ABSTRACT
The advent of clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR-associated nuclease 9 (Cas9) technology has revolutionized the field of genetic engineering, offering unprecedented potential for the targeted manipulation of DNA sequences. Advances in the mechanism of action of the CRISPR-Cas9 system allowed potential applicability for the treatment of genetic diseases. CRISPR-Cas9's mechanism of action involves the use of an RNA guide molecule to target-specific DNA sequences and the Cas9 enzyme to induce precise DNA cleavage. In the context of the CRISPR-Cas9 system, this review covers nonviral delivery methods for gene editing based on peptide internalization. Here, we describe critical areas of discussion such as immunogenicity, emphasizing the importance of safety, efficiency, and cost-effectiveness, particularly in the context of treating single-mutation genetic diseases using advanced editing techniques genetics as prime editor and base editor. The text discusses the versatility of cell-penetrating peptides (CPPs) in forming complexes for delivering biomolecules, particularly ribonucleoprotein for genome editing with CRISPR-Cas9 in human cells. In addition, it emphasizes the promise of combining CPPs with DNA base editing and prime editing systems. These systems, known for their simplicity and precision, hold great potential for correcting point mutations in human genetic diseases. In summary, the text provides a clear overview of the advantages of using CPPs for genome editing with CRISPR-Cas9, particularly in conjunction with advanced editing systems, highlighting their potential impact on clinical applications in the treatment of single-mutation genetic diseases. [Figure: see text].
Subject(s)
CRISPR-Cas Systems , Cell-Penetrating Peptides , Gene Editing , Genetic Diseases, Inborn , Genetic Therapy , Humans , Gene Editing/methods , Genetic Therapy/methods , Genetic Diseases, Inborn/therapy , Genetic Diseases, Inborn/genetics , Gene Transfer Techniques , AnimalsABSTRACT
Introdução: O trabalho conjunto da genética médica e da fonoaudiologia é essencial, contribuindo para o desenvolvimento de procedimentos que auxiliam no tratamento de pacientes com distúrbios da comunicação. Objetivo: Analisar as características fonoaudiológicas de pacientes pediátricos atendidos por um serviço de genética clínica. Método: Estudo transversal observacional, realizado com pacientes atendidos pelo serviço de genética de um hospital em Porto Alegre. Para a coleta de dados, aplicou-se um questionário relacionado as áreas de audição, deglutição, motricidade orofacial, voz e linguagem. Resultados: A amostra foi constituída por 54 participantes com idades entre 8 meses e 17 anos (média de idade 6 anos e 5 meses). 24,07% (n=13) dos pacientes apresentaram diagnóstico de síndrome, e 59,26% (n=32) tinham atraso no desenvolvimento neuropsicomotor. Com relação ao perfil fonoaudiológico, 81,48% (n=44) apresentaram algum hábito oral deletério durante a infância. 16,67% (n=9) percebiam alguma dificuldade para ouvir e 29,62% (n=16) para deglutir. 85,19% (n=46) dos participantes manifestaram a linguagem oral desenvolvida e, destes, 71,74% (n=33) apresentavam trocas na fala. 33,33% (n=18) já estavam em atendimento fonoaudiológico, e outros 24,07% (n=13) estavam na fila de espera para este atendimento. Conclusões: Uma parte significativa dos pacientes apresentou queixas e/ou manifestações nas áreas da comunicação humana, principalmente em relação à linguagem, à fala e aos hábitos orais deletérios. Esses dados destacam a importância do encaminhamento para a equipe de fonoaudiologia. (AU)
Introduction: The collaborative efforts of medical genetics and speech therapy are essential, contributing to the development of procedures that assist in treating patients with communication disorders. Objective: To analyze the speech therapy characteristics of pediatric patients seen by a clinical genetics service. Methods: Observational cross-sectional study conducted with patients seen at the genetics service of a hospital in Porto Alegre. A questionnaire related to hearing, swallowing, orofacial motricity, voice, and language areas was used for data collection. Results: The sample consisted of 54 participants aged between 8 months and 17 years, with an average age of 6 years and 5 months. 24.07% (n=13) of the patients had a diagnosis of syndrome, and 59.26% (n=32) had delayed neuropsychomotor development. Regarding the speech therapy profile, 81.48% (n=44) had some harmful oral habit during childhood. 16.67% (n=9) reported some difficulty in hearing, and 29.62% (n=16) in swallowing. 85.19% (n=46) of the participants showed developed oral language, and of these, 71.74% (n=33) made speech substitutions. 33.33% (n=18) of the patients were already undergoing speech therapy, and another 24.07% (n=13) were on the waiting list for this treatment. Conclusions: A significant portion of the patients presented complaints and/or manifestations in the areas of human communication, especially regarding language, speech, and harmful oral habits. These data highlight the importance of referral to the speech therapy team. (AU)
Introducción: La colaboración entre genética médica y foniatría es esencial para desarrollar procedimientos que ayuden en el tratamiento de pacientes con trastornos de la comunicación. Objetivo:Analizar las características de patología del habla y lenguaje de pacientes pediátricos atendidos por un servicio de genética clínica. Método: Estudio transversal observacional con pacientes atendidos por el servicio de genética de un hospital en Porto Alegre. Se aplicó un cuestionario sobre audición, deglución, motricidad orofacial, voz y lenguaje. Resultados: La muestra consistió en 54 participantes con edades comprendidas entre 8 meses y 17 años (media: 6 años y 5 meses). El 24,07% (n=13) de los pacientes tenían un diagnóstico de síndrome, y el 59,26% (n=32) presentaron retraso en el desarrollo neuropsicomotor. En cuanto al perfil foniatra, el 81,48% (n=44) presentaron algún hábito oral perjudicial durante la infancia. El 16,67% (n=9) reportaron dificultades para oír, y el 29,62% (n=16) para tragar. El 85,19% (n=46) manifestaron lenguaje oral desarrollado y, de ellos, el 71,74% (n=33) realizaban intercambios en el habla. El 33,33% (n=18) de los pacientes ya estaban en tratamiento foniatra y el 24,07% (n=13) estaban en lista de espera para este tratamiento. Conclusiones: Una parte significativa de los pacientes presentó quejas y/o manifestaciones en las áreas de la comunicación humana, especialmente en relación con el lenguaje, el habla y los hábitos orales perjudiciales, enfatizando la importancia de la derivación al equipo de foniatría. (AU)
Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Adolescent , Health Services , Language Development Disorders/genetics , Speech Therapy , Syndrome , Cross-Sectional Studies , Surveys and Questionnaires , Genetics, Medical , Genetic Diseases, InbornABSTRACT
Introducción: Las mujeres con predisposición genética-familiar presentan un riesgo más elevado de desarrollar cáncer de mama. La vigilancia es una de las estrategias más efectivas para ofrecer a este subgrupo de mujeres, sin embargo la adherencia a la misma puede ser dificultosa. Objetivo: Analizar la adherencia de las pacientes con Alto Riesgo Heredo-Familiar (ARHF) al programa específico de "Seguimiento de pacientes de Alto Riesgo" del Hospital Universitario Austral. Material y método: Se revisaron de forma retrospectiva datos de 104 mujeres sanas con ARHF que ingresaron al programa de vigilancia: "Seguimiento de pacientes de Alto Riesgo" del Hospital Universitario Austral en el período comprendido entre junio de 2016 a febrero de 2022. Resultados: La adherencia al programa fue total en 38 pacientes (36,54%) y parcial en 42 (40,38%). Se observó falta de adherencia en 24 pacientes (23,07%). La causa más prevalente fue la incomodidad al realizar la resonancia (54,16%). Analizando la adherencia según el año de ingreso al programa se observa una caída significativa a partir del 3er año de seguimiento y solo 48,98% completaron la sexta ronda. Conclusiones: La falta de adherencia observada fue significativa. Los datos demostrados apuntan a una necesidad de continuar desarrollando estrategias que faciliten el seguimiento(AU)
Introduction: Women with a genetic-familial predisposition have a higher risk of developing breast cancer. Surveillance is one of the most effective strategies to offer this subgroup of women, however adherence to it can be difficult. Objetive: To analize the adherence of patients with High Risk of Familial-Hereditary (HRFH) breast cancer to a specific program: "Follow-up in High Risk patients" of the Austral University Hospital. Material and method: Data from 104 women with HRFH who were admitted to the surveillance program: "Follow-up in High Risk patients" of the Austral University Hospital in the period from june 2016 to february 2022 were retrospectively reviewed. Results: Adherence to the program was complete in 38 patients (36,54%) and partial in 42 (40,38%). 24 (23,07%) patients had lack of adherence. The most prevalent cause was discomfort when performing the resonance (54,16%). When we analyze adherence according to the year of admission to the program, a significant drop is observed from de 3rd year of follow-up and only 48,98% completed round six. Conclusions: The observed lack of adherence was significant. The demonstrated data points to a need to continue developing strategies that facilitate monitoring(AU)
Subject(s)
Treatment Adherence and Compliance , Genetic Diseases, InbornABSTRACT
INTRODUÇÃO: A hipercolesterolemia familiar (HF) é um distúrbio genético bem reconhecido que se manifesta como níveis significativamente elevados de LDL-c sérico devido a aberrações no metabolismo das lipoproteínas. A maioria dos casos de HF, especificamente 85-90%, está associada a mutações patogênicas no gene do receptor de LDL (LDLR). Além disso, a presença de mutações de perda de função (LOF) no gene PCSK9 tem sido associada a um risco reduzido de doença cardiovascular, um fenômeno observado mesmo quando variantes patogênicas de LDLR coexistem. MÉTODOS: Este estudo incluiu um homem de 46 anos com dislipidemia e uso inconsistente de rosuvastatina. Na história familiar consta uma irmã (caso índice) e um sobrinho diagnosticados com HF portadores de variante patogênica de LDLR (c.313+1G>A, heterozigoto). RESULTADOS: O paciente relatou o aparecimento de dor precordial típica um mês antes da consulta. O exame físico revelou arco corneano. Os resultados laboratoriais iniciais mostraram colesterol total em 254 mg/dL, LDL-c em 191 mg/dL, HDL-c em 49 mg/dL e triglicerídeos em 69 mg/dL. Um escore Dutch MedPed de 11 confirmou HF. A ecocardiografia transtorácica indicou função ventricular esquerda normal. A angiografia coronária revelou calcificação significativa e estenose da artéria coronária direita (RCA) e da artéria circunflexa esquerda proximal (LCx). A intervenção incluiu angioplastia LCx e manejo conservador da RCA. Medicamentos pós-alta incluíram AAS 100mg/dia, Clopidogrel 75mg/dia, Rosuvastatina 40mg/ dia e Ezetimibe 10mg/dia. O nível de LDL-c diminuiu para 76 mg/dL no acompanhamento. A análise genética confirmou a variante familiar de LDLR e identificou uma mutação LOF coexistente de PCSK9 (R46L, heterozigoto). CONCLUSÃO: Este caso destaca a gravidade e complexidade da aterosclerose multivascular associada à HF. Embora a variante LOF de PCSK9 seja potencialmente protetora, sua influência nos resultados clínicos permanece incerta. Essa ambiguidade reforça a progressão multifatorial da aterosclerose e a resposta variável ao tratamento em pacientes com HF. Isso ressalta a importância de identificar fatores genéticos e não genéticos adicionais que contribuem para a doença, além dos loci genéticos conhecidos para entender e gerenciar melhor essa condição clínica.
Subject(s)
Genetic Loci , Proprotein Convertase 9 , Hyperlipoproteinemia Type II , Chest Pain , Genetic Diseases, InbornABSTRACT
In this pilot study, we aimed to evaluate the feasibility of whole genome sequencing (WGS) as a first-tier diagnostic test for infants hospitalized in neonatal intensive care units in the Brazilian healthcare system. The cohort presented here results from a joint collaboration between private and public hospitals in Brazil considering the initiative of a clinical laboratory to provide timely diagnosis for critically ill infants. We performed trio (proband and parents) WGS in 21 infants suspected of a genetic disease with an urgent need for diagnosis to guide medical care. Overall, the primary indication for genetic testing was dysmorphic syndromes (n = 14, 67%) followed by inborn errors of metabolism (n = 6, 29%) and skeletal dysplasias (n = 1, 5%). The diagnostic yield in our cohort was 57% (12/21) based on cases that received a definitive or likely definitive diagnostic result from WGS analysis. A total of 16 pathogenic/likely pathogenic variants and 10 variants of unknown significance were detected, and in most cases inherited from an unaffected parent. In addition, the reported variants were of different types, but mainly missense (58%) and associated with autosomal diseases (19/26); only three were associated with X-linked diseases, detected in hemizygosity in the proband an inherited from an unaffected mother. Notably, we identified 10 novel variants, absent from public genomic databases, in our cohort. Considering the entire diagnostic process, the average turnaround time from enrollment to medical report in our study was 53 days. Our findings demonstrate the remarkable utility of WGS as a diagnostic tool, elevating the potential of transformative impact since it outperforms conventional genetic tests. Here, we address the main challenges associated with implementing WGS in the medical care system in Brazil, as well as discuss the potential benefits and limitations of WGS as a diagnostic tool in the neonatal care setting.
Subject(s)
Genetic Testing , Intensive Care Units, Neonatal , Whole Genome Sequencing , Humans , Brazil/epidemiology , Infant, Newborn , Male , Female , Genetic Testing/methods , Pilot Projects , Infant , Genetic Diseases, Inborn/diagnosis , Genetic Diseases, Inborn/geneticsABSTRACT
Este estudo objetivou realizar uma revisão sistemática da literatura (RSL) sobre anomalias dentárias e craniofaciais em indivíduos com Anemia de Fanconi (AF), além de avaliar a ocorrência dessas alterações em um estudo transversal aprovado pelo Comitê de Ética em Pesquisa. A pesquisa foi realizada em parceria com o Hospital das Clínicas da Universidade Federal de Minas Gerais e o Hospital de Clínicas da Universidade Federal do Paraná, dois centros de referência no Brasil. A AF é uma doença genética rara e carece de estudos sobre características dentárias e craniofaciais. Para a RSL, foram realizadas buscas eletrônicas em seis bases de dados, complementadas por análise manual e da literatura cinzenta. Foram incluídos estudos transversais e relatos de casos. No total, 19 artigos com 158 casos de AF foram analisados. A prevalência estimada de anomalias dentárias variou de 13,3% a 71,4%. Dos 158 indivíduos, 130 apresentavam anormalidades dentárias e/ou radiculares, e 56 tinham maloclusão e/ou anomalias craniofaciais. O estudo transversal foi baseado em avaliação clínico-radiográfica e incluiu 46 pacientes diagnosticados com AF a partir de exames de pesquisa de quebras cromossômicas. Nosso estudo revelou que 93,5% dos pacientes apresentaram anomalias dentárias e/ou craniofaciais, especialmente anormalidades radiculares. Homens apresentaram predominantemente anomalias de erupção/exfoliação. Uma maior ocorrência de anomalias relacionadas ao tamanho do dente foi observada em indivíduos que passaram por transplante de células-tronco hematopoéticas com idade ≥14 anos. A literatura limitada e a variabilidade de anomalias dentárias e craniofaciais na AF destacam a necessidade de expandir e padronizar critérios de diagnóstico e o monitoramento destes indivíduos, o que pode ajudar a mitigar o impacto dessa condição na saúde geral e qualidade de vida dos indivíduos afetados.
The present study aimed to conduct a systematic review of the literature on dental and craniofacial anomalies in individuals with Fanconi Anemia, as well as to evaluate the occurrence of these alterations in a cross-sectional study approved by the Research Ethics Committee. The research was conducted in partnership with two Brazilian reference centers, the Hospital das Clínicas of the Federal University of Minas Gerais and the Hospital de Clínicas of the Federal University of Paraná. Fanconi Anemia (FA) is a rare genetic disease and lacks studies on dental and craniofacial characteristics. For the systematic literature review, electronic searches were conducted in six databases, complemented by manual analysis and gray literature. Cross-sectional studies and case reports were included. A total of 19 articles describing 158 cases of FA were analyzed. The estimated prevalence of dental anomalies ranged from 13.3% to 71.4%. Among the 158 individuals, 130 exhibited dental and/or root abnormalities, while 56 presented malocclusion and/or craniofacial anomalies. Our cross-sectional study was based on clinical-radiographic evaluation and included 46 patients diagnosed with FA through chromosomal breakage tests and/or genetic tests. Our study revealed that 93.5% of the patients presented dental and/or craniofacial anomalies, particularly root abnormalities. that 93.5% of patients presented dental/craniofacial anomalies, particularly radicular abnormalities. Males predominantly exhibited eruption/exfoliation anomalies. A higher occurrence of anomalies related to tooth size was observed in individuals who underwent hematopoietic stem cell transplantation at ≥14 years of age. The limited literature and variability of dental and craniofacial anomalies in FA highlight the need to expand and standardize diagnostic criteria for effective monitoring and mitigation of their impact on health and quality of life.
Subject(s)
Oral Manifestations , Tooth Abnormalities , Craniofacial Abnormalities , Fanconi Anemia , Genetic Diseases, Inborn , Systematic ReviewABSTRACT
El Hospital Garrahan ha sido pionero en el diagnóstico molecular de patologías pediátricas en Argentina. Los avances tecnológicos de las últimas décadas en el área de la biología molecular, sentaron las bases para la optimización y ampliación del diagnóstico molecular a partir de la secuenciación masiva en paralelo de múltiples genes. El presente trabajo describe el proceso de implementación de los estudios de secuenciación de nueva generación y el desarrollo de la Unidad de Genómica en un hospital público pediátrico de alta complejidad, así como su impacto en las capacidades diagnósticas de enfermedades poco frecuentes de origen genético. La creación del Grupo Interdisciplinario de Estudios Genómicos constituyó la vía institucional para la toma de decisiones que implican la implementación de nuevos estudios genómicos y el establecimiento de prioridades diagnósticas, extendiendo la disponibilidad del diagnóstico molecular a más disciplinas. La Unidad de Genómica trabaja en diseñar las estrategias que permitan la mayor optimización de los recursos con los que cuenta el hospital, teniendo en cuenta el equipamiento disponible, las prioridades establecidas y la frecuencia de las distintas patologías. Se demuestra el salto significativo operado en nuestras capacidades diagnósticas, tanto en la variedad de enfermedades como en el número de genes analizados, habiendo estudiado a la fecha alrededor de 2.000 pacientes, muchos de los cuales ven de este modo finalizada su odisea diagnóstica. Los estudios de NGS se han convertido en una herramienta de la práctica diaria para la atención de un número importante de pacientes de nuestro hospital. Continuaremos trabajando para ampliar su aplicación a la mayor cantidad de patologías, a través de los mecanismos institucionales ya existentes (AU)
The Garrahan Hospital has been a pioneer in the molecular diagnosis of pediatric diseases in Argentina. The technological advances of the last decades in the area of molecular biology have laid the foundations for the optimization and expansion of molecular diagnostics through massive parallel sequencing of multiple genes. This study describes the process of implementation of next-generation sequencing studies and the development of the Genomics Unit in a public pediatric tertiary hospital, and its impact on the capacity to diagnose rare diseases of genetic origin. The creation of the Interdisciplinary Group of Genomic Studies constituted the institutional pathway for decision-making involving the implementation of new genomic studies and the establishment of diagnostic priorities, extending the availability of molecular diagnostics to additional disciplines. The Genomics Unit is working to design strategies that allow for optimization of the resources available to the hospital, taking into account the equipment available, the priorities established, and the frequency of the different diseases. It demonstrates the significant leap in our diagnostic capabilities, both in the variety of diseases and in the number of genes analyzed. To date, around 2,000 patients have been studies, many of whom have thus completed their diagnostic odyssey. NGS studies have become a tool in daily practice for the care of a significant number of patients in our hospital. We will continue working to expand its application to as many diseases as possible, through the existing institutional mechanisms (AU)
Subject(s)
Humans , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Genomics/instrumentation , Molecular Diagnostic Techniques/methods , High-Throughput Nucleotide Sequencing , Genomic Medicine/trends , Genetic Diseases, Inborn/diagnosis , Laboratories, Hospital , Hospitals, PediatricABSTRACT
Introdução: A prematuridade é um fator de risco para o crescimento e o desenvolvimento dos neonatos. Objetivo: Analisar as características clinicas e fonoaudiológicas de neonatos hospitalizados na unidade de tratamento intensivo (UTI) neonatal com suspeita de doença genética. Material e Método:Estudo transversal descritivo, conduzido em um hospital na região sul do Brasil com coleta de dados entre novembro de 2020 e setembro de 2021. Todos os neonatos que se encontravam internados na UTI, atendidos pelo Sistema Único de Saúde e que apresentavam suspeita de etiologias genéticas foram acompanhados pela equipe de Fonoaudiologia. Foram analisados todos os prontuários dos recém-nascidos com suspeita de alteração genética, extraindo-se os dados médicos e fonoaudiológicos. Resultados:A amostra foi constituída por 14 neonatos prematuros com média de idade gestacional de 36 semanas e 5 dias e uma média de tempo de nascimento, no momento da avaliação fonoaudiológica, de 14,6 dias de vida. No que se refere às comorbidades, 71,4% dos recém-nascidos apresentavam alguma malformação, sendo múltiplas na maior parte dos casos (64,29%). Todos os neonatos estavam fazendo uso de via enteral de alimentação durante a avaliação fonoaudiológica. Na avaliação de reflexos orais, observou-se que houve um predomínio de pacientes com reflexo de procura débil, sendo que a maior parte apresentava reflexo de sucção presente. Conclusões: Pode-se afirmar que, neste estudo, a amostra foi composta por pacientes principalmente prematuros que apresentavam malformações múltiplas e que todos faziam uso de via alternativa de alimentação sugerindo, assim, a necessidade de atendimento fonoaudiológico como parte da assistência multidisciplinar desses neonatos. (AU)
Introduction: Prematurity is a risk factor for the growth and development of neonates. Objective: To analyze clinical and speech therapy characteristics of neonates hospitalized in the neonatal intensive care unit with suspected genetic disease. Method: Descriptive cross-sectional study conducted in a hospital in southern Brazil with data collection between November 2020 and September 2021. All neonates who were hospitalized in the ICU attended by the public health system and who were suspected of having genetic etiologies were followed up by the Speech-Language Pathology team. All newborn`s medical records with suspected genetic alterations were analyzed and the medical and the speech-language pathology data were analyzed. Results: The sample consisted of 14 premature neonates with a mean gestational age of 36 weeks and 5 days and a mean time of birth, at the time of the speech-language pathology assessment, of 14.6 days of life. Regarding to comorbidities, 71.4% of newborns had some malformation, being multiple in most cases (64.29%). All neonates were using enteral feeding at the time of the speech-language evaluation. At the oral reflexes evaluation it was observed that there was a predominance of patients with a weak rooting reflex and most of them had a present sucking reflex. Conclusions: In this study the sample consisted of mainly premature patients who had multiple malformations and all of them used an alternative feeding route, thus suggesting the demand for speech therapy as part of the multidisciplinary care of these neonates. (AU)
Introducción: La prematuridad es un factor de riesgo para el crecimiento y desarrollo de los recién nacidos. Objetivo: Analizar las características clinicas y de terapia del habla de recién nacidos hospitalizados en la unidad de cuidados intensivos neonatales (UCI) con sospecha de enfermedad genética. Método: Estudio transversal descriptivo realizado en un hospital en la región del Sur de Brasil. Todos los recién nacidos que fueron hospitalizados en la UTI y que tenían sospecha de tener etiologías genéticas, fueron atendidos por el equipo de Patología del Habla y Lenguaje. Se analizaron todas las historias clínicas de los recién nacidos con sospecha de alteraciones genéticas, extrayéndose datos médicos y de patología del habla y del lenguaje. Resultados: La muestra estuvo constituida por 14 neonatos prematuros con una edad gestacional media de 36 semanas. En cuanto a las comorbilidades, el 71,4% de los recién nacidos presentó alguna malformación, siendo múltiples en la mayoría de los casos (64,29%). Con respecto a los datos de la evaluación de la patología del habla y el lenguaje, todos los recién nacidos estaban usando alimentación enteral. En la evaluación de los reflejos orales, se observó que hubo un predominio de pacientes con reflejo de búsqueda débil, y la mayoría de ellos tenían presente el reflejo de succión. Conclusiones: Se puede decir que en este estudio la muestra estuvo compuesta principalmente por pacientes prematuros, que presentaban plurimalformaciones y que todos utilizaban una vía alternativa de alimentación, sugiriendo así, la necesidad de la fonoaudiología como parte del cuidado multidisciplinario de estos neonatos. (AU)
Subject(s)
Humans , Male , Female , Infant, Newborn , Infant, Premature , Intensive Care Units, Neonatal , Genetic Diseases, Inborn , Sucking Behavior , Abnormalities, Multiple , Cross-Sectional Studies , Enteral Nutrition , Speech, Language and Hearing Sciences , Electronic Health RecordsABSTRACT
El cáncer de mama es la causa más común de muerte por cáncer en el mundo, y la resistencia a los medicamentos es una de las barreras más importantes para el éxito de la terapia de la enfermedad. Es fundamental tener una comprensión sólida de los procesos moleculares que impulsan la resistencia al tratamiento en el cáncer de mama para diseñar terapias dirigidas con el potencial de superar esta resistencia. Estos mecanismos son complejos y multifacéticos e incluyen la activación de vías de señalización que promueven la supervivencia y proliferación celular, la regulación positiva de las bombas de salida de fármacos, la aparición de células madre cancerosas y cambios genéticos y epigenéticos. Esta revisión de la literatura brinda una descripción general de estos mecanismos y analiza las posibles estrategias para superar la resistencia a los medicamentos en el cáncer de mama, incluido el uso de terapias dirigidas que se dirigen específicamente a las vías y los mecanismos involucrados en la resistencia a los medicamentos. La revisión también destaca la necesidad de más investigación para identificar estrategias efectivas para superar la resistencia a los medicamentos y mejorar los resultados del tratamiento en pacientes con cáncer de mama.
Breast cancer is the most common cause of death from cancer in the world, and drug resistance is one of the most significant barriers to successful therapy for the disease. It is critical to have a solid understanding of the molecular processes driving treatment resistance in breast cancer to design targeted therapies with the potential to overcome this resistance. These complex and multifaceted mechanisms include the activation of signaling pathways that promote cell survival and proliferation, the upregulation of drug efflux pumps, the emergence of cancer stem cells, and genetic and epigenetic changes. This literature review provides an overview of these mechanisms. It discusses potential strategies for overcoming drug resistance in breast cancer, including targeted therapies that specifically target the pathways and mechanisms involved in drug resistance. The review also highlights the need for further research to identify effective strategies for overcoming drug resistance and improving treatment outcomes in breast cancer patients.
Subject(s)
Breast Neoplasms , Molecular Mechanisms of Pharmacological Action , Neoplastic Stem Cells , Signal Transduction , Genetic Diseases, InbornABSTRACT
Abstract Objective The present study evaluated the profile of germline mutations present in patients who underwent genetic counseling for risk assessment for breast cancer (BC), ovarian cancer (OC), and endometrial cancer (EC) with a possible hereditary pattern. Methods Medical records of 382 patients who underwent genetic counseling after signing an informed consent form were analyzed. A total of 55.76% of patients (213/382) were symptomatic (personal history of cancer), and 44.24% (169/382) were asymptomatic (absence of the disease). The variables analyzed were age, sex, place of birth, personal or family history of BC, OC, EC, as well as other types of cancer associated with hereditary syndromes. The Human Genome Variation Society (HGVS) nomenclature guidelines were used to name the variants, and their biological significance was determined by comparing 11 databases. Results We identified 53 distinct mutations: 29 pathogenic variants, 13 variants of undetermined significance (VUS), and 11 benign. The most frequent mutations were BRCA1 c.470_471delCT, BRCA1 c.4675 + 1G > T, and BRCA2 c.2T> G. Furthermore, 21 variants appear to have been described for the first time in Brazil. In addition to BRCA1/2 mutations, variants in other genes related to hereditary syndromes that predispose to gynecological cancers were found. Conclusion This study allowed a deeper understanding of the main mutations identified in families in the state of Minas Gerais and demonstrates the need to assess the family history of non-gynecological cancer for risk assessment of BC, OC, and EC. Moreover, it is an effort that contributes to population studies to evaluate the cancer risk mutation profile in Brazil.
Resumo Objetivo O presente estudo avaliou o perfil de mutações germinativas presentes em pacientes submetidas a aconselhamento genético para avaliação de risco para câncer de mama (CM), câncer de ovário (OC) e câncer de endométrio (CE) com possível padrão hereditário. Métodos Foram analisados os prontuários de 382 pacientes que realizaram aconselhamento genético após consentimento informado. Um total de 55,76% dos pacientes (213/382) eram sintomáticos (história pessoal de câncer), e 44,24% (169/382) eram assintomáticos (ausência da doença). As variáveis analisadas foram idade, sexo, naturalidade, história pessoal ou familiar de CM, OC, CE bem como outros tipos de câncer associados a síndromes hereditárias. As diretrizes de nomenclatura da Human Genome Variation Society (HGVS) foram usadas para nomear as variantes e seu significado biológico foi determinado pela comparação de 11 bancos de dados. Resultados Identificamos 53 mutações distintas: 29 variantes patogênicas, 13 variantes de significado indeterminado e 11 benignas. As mutações mais frequentes foram BRCA1 c.470_471delCT, BRCA1 c.4675 + 1G > T e BRCA2 c.2T > G. Além disso, 21 variantes parecem ter sido descritas pela primeira vez no Brasil. Além das mutações BRCA1/2, foram encontradas variantes em outros genes relacionados a síndromes hereditárias que predispõem a cânceres ginecológicos. Conclusão Este estudo permitiu conhecer melhor as principais mutações identificadas nas famílias do estado de Minas Gerais e demonstra a necessidade de avaliar a história familiar de câncer não ginecológico para avaliação do risco de CM, OC e CE. Além disso, é um esforço que contribui com estudos populacionais para avaliar o perfil de mutações de risco para câncer no Brasil.
Subject(s)
Humans , Female , Breast Neoplasms/prevention & control , Risk Factors , Endometrial Neoplasms/prevention & control , Genetic Counseling , Genital Neoplasms, Female/prevention & control , Genetic Diseases, InbornABSTRACT
Most genetic diseases affect purebred animals and are inherited as recessive genes. Cranioschisis refers to dysraphism, which occurs in the midline of the skull due to failure to close the cranial symphysis, which can lead to herniation of the meninges filled with cerebrospinal fluid (meningocele), where there is usually a projection of the meningeal tissue. Diagnosis is performed based on clinical examination, characteristic anatomopathological data, and complementary imaging tests. The surgical approach for correction of cranioschisis is the only described as a therapeutic solution and is indicated in cases in which the cranial synthesis defect does not allow for brain protrusion and there is only the occurrence of meningocele, in addition to the absence of severe signs of neurological alteration. This paper reports a case of the use of polymethylmethacrylate (PMMA) plaque to treat cranioschisis associated with meningocele in a Girolando heifer. The surgical opening of the frontonasal sacculation allowed draining a total liquid content of 488 mL, inspection, and suture of the envelope membrane. APMMA plaque, molded to the bone surface and anchored in the adjacent soft tissue, was used to cover the evidenced frontonasal bone opening. Despite the unfavorable prognosis of the disease, the cranioplasty surgery for the treatment of cranioschisis associated with meningocele using PMMA plaque obtained satisfactory results relative to the quality and maintenance of this animal's life, evaluated at 19 months postoperatively.(AU)
A maioria das doenças genéticas acometem animais de raça pura e herdados como genes recessivos.Acraniosquise refere-se à disrafia, que acontece na linha média do crânio pelo não fechamento da sínfise craniana, podendo levar a herniação das meninges repletas de líquido cefalorraquidiano (meningocele), onde geralmente existe projeção do tecido meningeal. O diagnóstico é realizado a partir do exame clínico, dados anatomopatológicos característicos e através da realização de exames complementares de imagem. Como solução terapêutica, a abordagem cirúrgica para correção das craniosquises é a única descrita, e é indicada em casos em que o defeito de síntese craniana não permita a protrusão encefálica e exista a ocorrência apenas da meningocele, além da inexistência de sinais graves de alteração neurológica. O artigo relata um caso de uso de placa de polimetilmetacrilato (PMMA) no tratamento de craniosquise associada à meningocele em uma bezerra Girolando. Instituiu-se a abertura cirúrgica da saculação fronto-nasal, permitindo a drenagem de conteúdo líquido total de 488 mL, inspeção e rafia de membrana envoltória. Para recobrimento da abertura óssea fronto-nasal evidenciada, utilizou-se uma placa de polimetilmetacrilato (PMMA), moldada à superfície óssea e ancorada em tecido mole adjacente. Concluiu-se que, apesar do prognóstico desfavorável da enfermidade, a cirurgia de cranioplastia para tratamento de craniosquise associada à meningocele, com a utilização de placa de PMMA, neste caso, obteve resultados satisfatórios em relação a qualidade e manutenção da vida deste animal, avaliando-se em 19 meses pós-operatório.(AU)
Subject(s)
Animals , Female , Cattle , Spinal Dysraphism/drug therapy , Polymethyl Methacrylate/therapeutic use , Meningocele/drug therapy , Genetic Diseases, Inborn/veterinaryABSTRACT
GallowayMowat syndrome (GAMOS) is a rare hereditary disease manifested as a combination of nephrotic syndrome and central nervous system impairment. To date, many GAMOS cases attributed to various gene mutations have been reported such as WHAMM, NUP107, WDR73, OSGEP, and TP53RK. We detected two novel homozygous mutations of WDR73 ''NM_032856:c.G287A:p.R96K'' and TP53RK ''NM_033550:c.A193O:p.K65Q'' in two female kids of the consanguineous parents from different families using whole exome sequencing. Both patients almost manifested similar neurodegenerative phenotypes, including developmental delay, microcephaly, hypotonia, and brain atrophy on magnetic resonance imaging during infancy. WDR73-positive GAMOS case manifested a lateonset minimal nephrotic syndrome at the age 4 years while TP53RK-positive case presented nephrotic syndrome at the age 1 which progressed to steroid-resistant nephrotic syndrome due to lack of remission after 4-6 weeks of initial treatment with prednisone. Despite the brain abnormalities and the onset time difference of renal abnormalities, both patients are still alive. Given the heterogeneity of the renal phenotype among GAMOS types, accurate recognition of expanding spectrum of phenotype findings and regular renal function screening are necessary for an early diagnosis and timely treatment
A síndrome de Galloway-Mowat (GAMOS) é uma doença hereditária rara que se manifesta como uma combinação de síndrome nefrótica e comprometimento do sistema nervoso central. Até o momento, foram relatados muitos casos de GAMOS atribuídos a várias mutações genéticas, como WHAMM, NUP107, WDR73, OSGEP e TP53RK. Detectamos duas novas mutações homozigóticas de WDR73 ''NM_032856:c.G287A:p.R96K'' e TP53RK ''NM_033550:c.A193O:p.K65Q'' em duas crianças do sexo feminino, de pais consanguíneos de diferentes famílias usando o exoma completo de sequenciamento. Ambos os pacientes manifestaram fenótipos neurodegenerativos semelhantes, incluindo atraso no desenvolvimento, microcefalia, hipotonia e atrofia cerebral por ressonância magnética durante a infância. O caso GAMOS positivo para WDR73 manifestou síndrome nefrótica mínima de início tardio aos quatro anos de idade, enquanto o caso positivo para TP53RK apresentou síndrome nefrótica com um ano de idade, que progrediu para síndrome nefrótica resistente a esteroides devido à falta de remissão após quatro a seis semanas de tratamento inicial com prednisona. Apesar das anormalidades cerebrais e da diferença de tempo de início das anormalidades renais, ambos os pacientes ainda estão vivos. Dada a heterogeneidade do fenótipo renal entre os tipos de GAMOS, o reconhecimento preciso do espectro em expansão dos achados fenótipos e a triagem regular da função renal são necessários para um diagnóstico precoce e tratamento oportuno
Subject(s)
Genetic Diseases, Inborn , Mutation/geneticsABSTRACT
El angioedema hereditario (AEH) es una enfermedad genética poco frecuente debida a una mutación de transmisión autosómica dominante que produce una alteración del gen que codifica la proteína inhibidora de la C1 esterasa activada (C1-INH), provoca un déficit o disfunción de la misma. Se caracteriza por episodios recurrentes y autolimitados con síntomas transitorios de hinchazón sin urticaria de tejidos subcutáneos, extremidades, pared intestinal, genitales y vías respiratorias superiores. La afectación de laringe y glotis puede ocasionar la muerte por asfixia. Se informa la conducción perioperatoria en una paciente portadora de AEH y un amplio historial de alergias donde las principales consideraciones están relacionadas con la prevención de una crisis aguda durante el perioperatorio. Para lograrlo se requirió de una preparación con plasma fresco congelado (PFC) y ácido tranexámico (ATX) con días de antelación a la cirugía que se continuó en el posoperatorio, además de un manejo cuidadoso durante el acto anestésico(AU)
Hereditary angioedema (HAE) is a rare genetic disease caused by an autosomal dominant mutation that results in an alteration of the gene encoding the activated C1 esterase inhibitor protein (C1-INH), causing deficiency or dysfunction of C1-INH. It is characterized by recurrent and self-limited episodes with transient symptoms of swelling without urticaria of subcutaneous tissues, extremities, intestinal wall, genitalia and upper respiratory tract. Involvement of the larynx and glottis may result in death by asphyxia. The perioperative managment is reported of a patient with HAE and a long history of allergies in which the main considerations are related to the prevention of an acute crisis during the perioperative period. This required a preparation with fresh frozen plasma and tranexamic acid days before surgery, which was continued postoperatively, in addition to careful management during the anesthetic procedure(AU)
Subject(s)
Humans , Female , Angioedemas, Hereditary , Genetic Diseases, Inborn , AnesthesiaABSTRACT
Introdução: Osteogênese Imperfeita (OI) é uma doença genética rara com fragilidade óssea. A classificação inclui muitos tipos. Além do risco de recorrência, o manejo pode variar com o tipo de OI. Relato do caso: Apresentamos um paciente do sexo masculino nascido com 39 semanas, de pais não consanguíneos e saudáveis. A hidrocefalia foi diagnosticada no pré-natal. Com 50 dias de vida, detectamos muitas fraturas e calos ósseos. O teste molecular identificou uma deleção em homozigose do éxon 4 do gene WNT1. Considerações finais: Concluímos que o caso apresentado tinha características clínicas de OI XV, e o teste molecular foi fundamental para o diagnóstico preciso e aconselhamento genético.
Introduction: Osteogenesis Imperfecta (OI) is a rare genetic disease with bone fragility. The classification includes many types. In addition, the risk of a recurrence, the management can vary with the kind of OI. Case report: We report a male patient born at 39 weeks from non-consanguineous healthy parents. The patient was diagnosed with Hydrocephalus at prenatal. At 50 days of life, we detected many fractures and bone calluses. The molecular test identified a homozygous deletion of exon 4 of the WNT1 gene. Final considerations: We conclude this case had clinical features of OI XV, and the molecular test was fundamental for the precise diagnosis and the genetic counseling.
Subject(s)
Humans , Male , Child, Preschool , Osteogenesis Imperfecta/diagnosis , Osteogenesis , Prenatal Care , Infant, Premature , Fractures, Bone , Genetic Counseling , Genetics , Genetic Diseases, Inborn , HydrocephalusABSTRACT
La distonía por mutación en el gen KMT2B es un subtipo recientemente descrito del inicio focal de la enfermedad en los miembros inferiores que, posteriormente, evoluciona a una forma generalizada con compromiso cervical y orofaríngeo, disartria, trastorno secundario de la deglución y discapacidad intelectual. Se describe el caso de una escolar de 10 años de edad, sin antecedentes de consanguinidad ni historia familiar de enfermedad neurológica, que presentó alteración de la marcha y distonía de inicio focal, de curso progresivo a una forma generalizada que afectó sus músculos orofaciales y bulbares con alteración significativa del lenguaje y la deglución. Los estudios metabólicos y sistémicos, incluidas las neuroimágenes, no evidenciaron anormalidades. Se hizo una secuenciación genómica completa y se identificó una nueva variante, probablemente patogénica heterocigota, en el gen KMT2B, la c.1205delC, p.(Pro402Hisfs*5), que causa desplazamiento en el marco de lectura. Este hallazgo explica el fenotipo de la paciente y la distonía de inicio temprano autosómica dominante. Se reporta una nueva mutación heterocigota del gen KMT2B como causa de distonía generalizada de inicio temprano, no reportada en la literatura especializada hasta el momento. El diagnóstico de esta afección tiene implicaciones en el tratamiento y el pronóstico de los pacientes, porque las estrategias terapéuticas tempranas pueden prevenir su rápido deterioro y un curso más grave de la enfermedad.
Introduction: KMT2B-related dystonia is a recently described subtype of focal-onset dystonia in the lower limbs, evolving into a generalized form with cervical, oropharyngeal involvement, dysarthria, swallowing disorder and intellectual disability. Clinical case: We describe the case of a 10-year-old female patient, without a history of consanguinity or neurological disease. She manifested abnormal gait and dystonia with focal onset and progressive course with evolution into generalized dystonia, affecting orofacial and bulbar muscles, significant alteration of language and swallowing. Metabolic and systemic studies, including neuroimaging, were found to be normal. A complete genomic sequencing study was performed identifying a new, probably pathogenic, heterozygous variant in the KMT2B gene, c.1205delC, p. (Pro402Hisfs*5), causing displacement in the reading frame, a finding that explains the patient's phenotype and it is associated to autosomal dominant childhood-onset dystonia-28. Conclusion: We report a new heterozygous mutation in the KMT2B gene as a cause of generalized early-onset dystonia not reported in the literature until the date. The diagnosis of this pathology has implications for the treatment and prognosis of patients, given that therapeutic strategies implemented early can prevent the fast deterioration and severe course of this disease.
Subject(s)
Dystonia , Genetic Diseases, Inborn , Dystonic Disorders , Deep Brain Stimulation , Intellectual Disability , Movement DisordersABSTRACT
La enfermedad de Rendu-Osler-Weber, también conocido como telangiectasia hemorrágica hereditaria, es una enfermedad genética de herencia autosómica dominante con penetrancia incompleta. Afecta por igual a ambos sexos y los síntomas se inician habitualmente entre los 20 y 40 años, pero se considera que la enfermedad está infradiagnosticada. Típicamente las formas clínicas y el debut de esta enfermedad se asocian a los órganos y tejidos que se afectan con mayor frecuencia: telangiectasias en mucosas y en piel, epistaxis, sangramiento gastrointestinal, pulmonar e intracerebral. En contraste, el caso clínico que se presenta se caracteriza porque las primeras manifestaciones clínicas que motivaron la consulta médica fueron crisis de dolores e inflamación ósea en el miembro superior derecho, lo cual es inusual y se inscribe como un elemento de novedad en la enfermedad. Es el objetivo de esta publicación exponer un caso de telangiectasia hemorrágica hereditaria con una forma de presentación atípica en una adolescente. Al alta hospitalaria, la paciente estaba estable, sin complicaciones. Se recomendó seguimiento hospitalario fundamentalmente por la especialidad de Neumología, por ser los pulmones los órganos más afectados(AU)
Rendu-Osler-Weber´s disease, also known as hereditary hemorrhagic telangiectasia, is a genetic disease of autosomal dominant inheritance with incomplete penetrance. It affects both sexes equally and symptoms usually begin between the ages of 20 and 40, but it is considered that the disease is underdiagnosed. Typically, the clinical forms and the onset of this disease are associated with the organs and tissues that are most frequently affected: mucosal and skin telangiectasias, epistaxis, gastrointestinal, pulmonary and intracerebral bleeding. In contrast, the clinical case that is presented is characterized because the first clinical manifestations that motivated the medical consultation were crises of pain and bone inflammation in the right upper limb, which is unusual and is inscribed as an element of novelty in the disease. The objective of this publication is to present a case of hereditary hemorrhagic telangiectasia with an atypical presentation in a female teenager(AU)
Subject(s)
Humans , Female , Adolescent , Genetic Diseases, Inborn/prevention & control , Telangiectasia, Hereditary Hemorrhagic/diagnosisABSTRACT
Introducción: La ecografía prenatal en el Programa de Prevención de Enfermedades Genéticas permite la detección precoz de malformaciones congénitas y mejora la calidad de vida de la madre y su familia. Objetivo: Conocer la frecuencia de malformaciones congénitas diagnosticadas en el Centro de Genética de Marianao y compararla con las estadísticas nacionales e internacionales. Métodos: Estudio retrospectivo, descriptivo y observacional. Se cuantificaron 203 malformaciones diagnosticadas entre 2007 y 2017 en el Centro de Genética de Marianao. Se consideraron como variables la edad materna, la edad gestacional del diagnóstico, la frecuencia por años y los tipos de malformaciones por sistemas. Resultados: En 13 307 nacimientos se diagnosticaron 203 fetos malformados (1,52 por ciento) a una edad gestacional media de 20,15 semanas. Las malformaciones más frecuentes fueron neurológicas (27,1 por ciento) y cardiovasculares (16,2 por ciento). En las madres adolescentes predominaron las cardiovasculares (27,3 por ciento) y digestivas (16,2 por ciento en las madres añosas, las cromosómicas (57,1 por ciento). Antes de la semana 17 se diagnosticaron malformaciones digestivas (41,7 por ciento) y neurológicas (40 por ciento); entre las 18 y 21 semanas, las esqueléticas (41,2 por ciento); entre las 22 y 26 semanas, cardiovasculares (66,7 por ciento) y cromosómicas (52,4 por ciento) y, después de la semana 27, las renales (9 por ciento. Conclusión: Predominaron las malformaciones neurológicas y cardiovasculares. La edad materna media fue superior en las malformaciones cromosómicas y menor en las digestivas y cardiovasculares. En el primer marcador del programa se diagnosticó la mayoría de las malformaciones digestivas y neurológicas; y en el segundo marcador, las cardiovasculares, cromosómicas y esqueléticas(AU)
Introduction: Prenatal ultrasound in the Genetic Disease Prevention Program allows early detection of congenital malformations and improves the quality of life of the mother and her family. Objective: To know the frequency of congenital malformations diagnosed at the Genetics Center of Marianao Municipality, Havana, Cuba, and to compare it with national and international statistics. Methods: Retrospective, descriptive and observational study. A total of 203 malformations diagnosed between 2007 and 2017 at the Genetics Center of Marianao were quantified. Maternal age, gestational age at diagnosis, frequency by years and types of malformations by systems were considered as variables. Results: In 13,307 births, 203 malformed fetuses were diagnosed (1.52 percent), at a mean gestational age of 20.15 weeks. The most frequent malformations were neurological (27.1 percent) and cardiovascular (16.2 percent). Cardiovascular (27.3 percent) and digestive (16.2 percent) malformations predominated in adolescent mothers, while chromosomal malformations predominated in older mothers (57.1 percent). Before the seventeenth week, digestive (41.7 percent) and neurological (40 percent) alformations were diagnosed; between the eighteenth and twenty-first weeks, skeletal (41.2 percent) malformations were diagnosed; between the twenty-second and twenty-sixth weeks, cardiovascular (66.7 percent) and chromosomal (52.4 percent) malformations were diagnosed; and after the twenty-seventh week, renal (9 percent) malformations were diagnosed. Conclusion: Neurological and cardiovascular malformations prevailed. The mean maternal age was higher in chromosomal malformations, and lower in digestive and cardiovascular malformations. Most of the digestive and neurological malformations were diagnosed in the first marker of the Program, while cardiovascular, chromosomal and skeletal malformations were diagnosed in the second marker(AU)
Subject(s)
Humans , Female , Pregnancy , Genetic Diseases, Inborn/prevention & control , Epidemiology, Descriptive , Retrospective Studies , Ultrasonography, Prenatal/methods , Observational StudyABSTRACT
A doença renal policística felina (DRP), comumente conhecida como PKD (Polycystic Kidney Disease), é uma enfermidade de caráter hereditário, congênita autossômica dominante, que se caracteriza pelo desenvolvimento de cistos renais com crescimento progressivo. Esses cistos também podem ser encontrados no pâncreas, fígado e baço, com tamanhos variados. É mais comumente diagnosticada em gatos, principalmente na raça persa ou mestiços, sem distinção por sexo e cor da pelagem. Os sinais clínicos variam de acordo com o comprometimento do parênquima renal e o diagnóstico precoce é significativo, para retirar pacientes acometidos da reprodução, evitando a disseminação da doença, visto que não há um tratamento específico.(AU)
The feline polycystic kidney disease, commonly known as PKD (Polycystic Kidney Disease) is a disease of hereditary character, congenital autosomal dominant character, which is characterized by the development of kidney cysts with progressive growth. These cysts can also be found in the pancreas, liver, and spleen, with varying sizes. It is most commonly diagnosed in cats, mainly in the Persian breed or mixed-breeds, without distinction for sex or coat color. The clinical signs vary according to the involvement of the renal parenchyma and early diagnosis is significant, to remove affected patients from breeding, avoiding the spread of the disease, since there is no specific treatment.(AU)