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1.
Int J Mol Sci ; 24(10)2023 May 09.
Artigo em Inglês | MEDLINE | ID: mdl-37239834

RESUMO

By the end of 2020, there were more than 8 million women alive who had received a breast cancer diagnosis in the previous 5 years, making it the most prevalent neoplasia in the world. About 70% of breast-cancer cases present positivity for estrogen and/or progesterone receptors and a lack of HER-2 overexpression. Endocrine therapy has traditionally been the standard of care for ER-positive and HER-2-negative metastatic breast cancer. In the last 8 years, the advent of CDK4/6 inhibitors has shown that adding them to endocrine therapy doubles PFS. As a result, this combination has become the gold standard in this setting. Three CDK4/6 inhibitors have been approved by the EMA and the FDA: abemaciclib, palbociclib, and ribociclib. They all have the same indications, and it is at each physician's discretion to choose one or the other. The aim of our study was to perform a comparative efficacy analysis of the three CDK4/6i using real-world data. We selected patients diagnosed with endocrine-receptor-positive and HER2-negative breast cancer who were treated with all three CDK4/6i as first-line therapy at a reference center. After 42 months of retrospective follow up, abemaciclib was associated with a significant benefit in terms of progression-free survival in endocrine-resistant patients and in the population without visceral involvement. In our real-world cohort, we found no other statistically significant differences among the three CDK4/6 inhibitors.


Assuntos
Neoplasias da Mama , Humanos , Feminino , Neoplasias da Mama/patologia , Estudos Retrospectivos , Quinase 4 Dependente de Ciclina , Inibidores de Proteínas Quinases/farmacologia , Quinase 6 Dependente de Ciclina , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico
2.
Mod Pathol ; 28(11): 1492-503, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26381823

RESUMO

Although TAZ, the final effector of the Hippo pathway that modulates epithelial to mesenchymal transition and stemness, has been implicated in the development of different types of cancer, its role in endometrial cancer has not yet been studied. Thus, we evaluated the expression of TAZ in different types of endometrial cancer by immunohistochemistry. TAZ expression was detected in 76% of undifferentiated endometrial carcinomas, 54% of endometrial carcinosarcomas, 46% of endometrial serous carcinomas, 36% of grade 3 endometrioid carcinomas, and 18% of grade 1-2 endometrioid carcinomas, with statistically significant differences. We analyzed the WWTR1 gene that encodes TAZ by FISH and MassARRAY spectrometry, ruling out gene amplification and differential promoter methylation as the main mechanisms that modulate TAZ expression in endometrial tumors. However, we did detect a significant association between Scribble hypoexpression and delocalization with TAZ expression. Moreover, we demonstrated that TAZ promoted invasiveness, and it favored cell motility and tumor growth, in endometrial cancer cell lines. In addition, TAZ expression was associated with the transition from an epithelial to mesenchymal phenotype, both in vitro and in human tumors. Together, these data reveal a previously unknown role for TAZ and the Hippo pathway in the progression of aggressive subtypes of endometrial cancer.


Assuntos
Carcinoma/patologia , Neoplasias do Endométrio/patologia , Transição Epitelial-Mesenquimal/fisiologia , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Animais , Western Blotting , Carcinoma/metabolismo , Movimento Celular/fisiologia , Proliferação de Células/fisiologia , Neoplasias do Endométrio/metabolismo , Feminino , Imunofluorescência , Xenoenxertos , Via de Sinalização Hippo , Humanos , Imuno-Histoquímica , Hibridização in Situ Fluorescente , Espectrometria de Massas , Camundongos , Análise de Sequência com Séries de Oligonucleotídeos , Reação em Cadeia da Polimerase , Proteínas Serina-Treonina Quinases/metabolismo , Transativadores , Fatores de Transcrição , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional
3.
J Pathol ; 232(3): 319-29, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24122292

RESUMO

Although it is becoming clear that certain miRNAs fulfil a fundamental role in the regulation of the epithelial-to-mesenchymal transition (EMT), a comprehensive study of the miRNAs associated with this process has yet to be performed. Here, we profiled the signature of miRNA expression in an in vitro model of EMT, ectopically expressing in MDCK cells one of seven EMT transcription factors (SNAI1, SNAI2, ZEB1, ZEB2, TWIST1, TWIST2 or E47) or the EMT inducer LOXL2. In this way, we identified a core subset of deregulated miRNAs that were further validated in vivo, studying endometrial carcinosarcoma (ECS), a tumour entity that represents an extreme example of phenotypic plasticity. Moreover, epigenetic silencing through DNA methylation of miRNA genes of the miR-200 family and miR-205 that are down-regulated during EMT was evident in both the in vitro (MDCK transfectants) and in vivo (ECS) models of EMT. The strong correlation between expression and DNA methylation suggests a major role for this epigenetic mark in the regulation of the miR-141-200c locus.


Assuntos
Carcinossarcoma/genética , Neoplasias do Endométrio/genética , Transição Epitelial-Mesenquimal/genética , MicroRNAs/genética , Transcriptoma/genética , Animais , Western Blotting , Linhagem Celular Tumoral , Metilação de DNA/genética , Cães , Feminino , Humanos , Reação em Cadeia da Polimerase em Tempo Real , Transfecção
4.
Cir Pediatr ; 28(3): 137-141, 2015 Jul 20.
Artigo em Espanhol | MEDLINE | ID: mdl-27775308

RESUMO

INTRODUCTION: Appendicular actinomycosis is a rare disease produced by cecal appendix invasion by Actinomyces gender bacteria after a predisposing cause that disrupts mucosal barrier, such as acute appendicitis. The highest frequency appears in adults; however, there are cases in paediatric age described in literature. The aim of this article is to introduce a case of appendicular actinomycosis in a child with atypical presentation and to review the literature. CLINICAL CASE: 10-year-old boy transferred to our hospital due to intraoperative finding at a different centre of a right flank tumor, without identification of cecal appendix. After completing the study with image tests, the patient was re-intervened with the diagnosis of complicated acute appendicitis. Intraoperatively, an organized plastron lacking of acute inflammatory signs was found. Post-surgical evolution was positive with conventional antibiotic treatment. Histological study of the specimen revealed an appendicular actinomycosis, so antibiotic treatment was widened in an outpatient basis and predisposing diseases were ruled out. COMMENTS: Appendicular actinomycosis is an infrequent cause of appendicitis that can simulate an intra-abdominal tumor in children and adults. It is necessary to rule out predisposing diseases and to administer an adequate antibiotic treatment.


INTRODUCCION: La actinomicosis apendicular es una patología rara producida por la invasión del apéndice cecal por bacterias del género Actinomyces al alterarse la barrera mucosa después de una causa predisponente, como podría ser una apendicitis aguda. Se presenta con mayor frecuencia en adultos, aunque en la literatura se han descrito algunos casos en edad pediátrica. En este artículo se presenta un nuevo caso pediátrico de actinomicosis apendicular de presentación atípica y se revisa la literatura al respecto. CASO CLINICO: Paciente varón de 10 años de edad derivado a nuestro hospital por el hallazgo intraoperatorio en otro centro de una tumoración en flanco derecho, sin identificación del apéndice cecal. Tras completar el estudio con pruebas de imagen, el paciente fue reintervenido bajo la orientación diagnóstica de apendicitis aguda complicada. Intraoperatoriamente, se identifica un plastrón organizado y con escasos signos inflamatorios agudos. La evolución postquirúrgica fue favorable con tratamiento antibiótico convencional. El estudio anatomopatológico de la pieza reveló una actinomicosis apendicular, por lo que se amplió el tratamiento antibiótico de forma ambulatoria y se descartó patología predisponente. COMENTARIOS: La actinomicosis apendicular es una causa infrecuente de apendicitis que puede simular una tumoración intraabdominal en niños y adultos. Es necesario descartar patología predisponente y realizar un tratamiento antibiótico adecuado.

5.
Mod Pathol ; 26(11): 1514-24, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23743934

RESUMO

Undifferentiated endometrial carcinomas are very aggressive high-grade endometrial carcinomas that are frequently under-recognized. This study aimed to analyze the molecular alterations underlying the development of these endometrial carcinomas, focusing on those related to dedifferentiation. We assessed a series of 120 tumors: 57 grade 1 and 2 endometrioid endometrial carcinomas, 15 grade 3 endometrioid endometrial carcinomas, 27 endometrial serous carcinomas, and 21 undifferentiated endometrial carcinomas. We found a high frequency of DNA mismatch repair deficiency (38%) and moderate rate of p53 overexpression (∼33%) in undifferentiated carcinomas. In contrast to the characteristic endometrioid phenotype, there was a dramatic downregulation of E-cadherin expression in the undifferentiated subtype. Quantitative methylation studies dismissed CDH1 promoter hypermethylation as the mechanism responsible for this change in gene expression, while immunohistochemistry revealed that the E-cadherin repressor ZEB1 was frequently overexpressed (62%) in undifferentiated endometrial carcinomas. This finding was accompanied by a sharp downregulation in the expression of the miR-200 family of microRNAs, well-known targets of ZEB1. Furthermore, there was enhanced expression of epithelial-to-mesenchymal transition markers in undifferentiated endometrial carcinomas, such as N-cadherin, cytoplasmic p120, and osteonectin. In addition, HMGA2, a regulator of epithelial-to-mesenchymal transition that is expressed in aggressive endometrial tumors, such as endometrial serous carcinomas and carcinosarcomas, was expressed in >20% of undifferentiated carcinomas. These results suggest that ZEB1 overexpression, associated with E-cadherin and miR-200s downregulation, and the expression of mesenchymal markers might enhance the metastatic potential of undifferentiated endometrial carcinomas, leading to a poor prognosis. In addition, our observations suggest that the immnohistochemical analysis of E-cadherin and ZEB1 can aid in the differential diagnosis of the more agressive undifferentiated endometrial carcinomas from grade 3 endometrioid carcinomas.


Assuntos
Biomarcadores Tumorais/análise , Caderinas/análise , Carcinoma/química , Diferenciação Celular , Neoplasias do Endométrio/química , Proteínas de Homeodomínio/análise , MicroRNAs/análise , Fatores de Transcrição/análise , Antígenos CD , Biomarcadores Tumorais/genética , Caderinas/genética , Carcinoma/genética , Carcinoma/patologia , Metilação de DNA , Reparo de Erro de Pareamento de DNA , Regulação para Baixo , Neoplasias do Endométrio/genética , Neoplasias do Endométrio/patologia , Transição Epitelial-Mesenquimal , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Imuno-Histoquímica , Gradação de Tumores , Valor Preditivo dos Testes , Prognóstico , Regiões Promotoras Genéticas , Espanha , Proteína Supressora de Tumor p53/análise , Estados Unidos , Regulação para Cima , Homeobox 1 de Ligação a E-box em Dedo de Zinco
6.
Rev Neurol ; 72(10): 352-356, 2021 May 16.
Artigo em Espanhol | MEDLINE | ID: mdl-33978229

RESUMO

INTRODUCTION: Minor strokes are considered to be those that present with few symptoms, although up to 40% of them entail long-term disability. The rate of thrombolysis in these patients is also lower than in other strokes. The aim of this study is to explore whether there are any differences in intravenous thrombolysis care times in minor strokes. PATIENTS AND METHODS: We conducted a retrospective review of strokes treated with intravenous thrombolysis at our centre and a comparative analysis of the care times in minor strokes and in the other types. RESULTS: Longer times were found in minor strokes in terms of door-to-CT scan and door-to-needle time. This was not the case, however, for the time from the onset of symptoms to arrival at the hospital. CONCLUSIONS: The presence of few symptoms in minor strokes can make them difficult to recognise and could be a reason for delaying treatment. Training among staff caring for these patients is essential to improve this aspect.


TITLE: Retraso en la administración de tratamiento trombolítico en el ictus minor.Introducción. Se considera ictus minor a aquel que se presenta con escasos síntomas; sin embargo, hasta un 40% presenta discapacidad a largo plazo. La tasa de trombólisis en estos pacientes también es inferior a la del resto de ictus. En este estudio se pretende explorar si existen diferencias en los tiempos de atención en la trombólisis intravenosa en los pacientes con ictus minor. Material y métodos. Revisión retrospectiva de los ictus tratados con trombólisis intravenosa en nuestro centro y análisis comparativo de los tiempos de asistencia entre ictus minor y el resto. Resultados. Se encontraron tiempos más alargados en los casos de ictus minor en cuanto al tiempo puerta-tomografía computarizada y puerta-aguja. No fue así, sin embargo, para el tiempo desde el inicio de los síntomas hasta la llegada al hospital. Conclusiones. La presencia de escasos síntomas en el ictus minor puede hacer difícil su reconocimiento y podría ser un motivo de retraso en el tratamiento. La formación entre el personal que atiende a estos pacientes es fundamental para mejorar este aspecto.


Assuntos
Fibrinolíticos/administração & dosagem , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica , Tempo para o Tratamento , Administração Intravenosa , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Índice de Gravidade de Doença
7.
ISA Trans ; 99: 454-464, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31662184

RESUMO

Temperature control in buildings is usually driven by energy conservation although the occupants' comfort is also important considering its impact on productivity and health. However, energy efficiency and comfort are opposing objectives and therefore this type of problem can be resolved by means of a multiobjective optimization approach. The simulations we carried out indicate that set points optimization has the potential to reduce energy consumption in the order of 10% while also providing a comfortable work environment for the occupants.

8.
Rev Enferm ; 32(6): 36-42, 2009 Jun.
Artigo em Espanhol | MEDLINE | ID: mdl-19653527

RESUMO

Health professional daily confront the pain and suffering persons who need our help undergo. From a nurse's methodology this article describes a new perspective about nurses' role regarding total pain, employing as a tool to deal with this topic the AREA holistic pain model, a model which centers on the person and his/her family permanently seeking results derived from a plan which joins together all treatments and based on the creation of a reasoning network that will provide prioritized nursing diagnoses.


Assuntos
Dor/enfermagem , Humanos , Processo de Enfermagem
9.
Br J Oral Maxillofac Surg ; 57(2): 169-173, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30712958

RESUMO

Our aim was to evaluate neurosensory symptoms after lateralisation of the inferior alveolar nerve (IAN). We studied a retrospective case series with one-year follow up that included 139 procedures in 123 patients. After the IAN had been located it was deflected from the mandibular body and the implant placed. Sensitivity was mapped 24hours, one month, six months, and one year after the intervention by gently pressing the skin and lips with the tip of a probe. A total of 337 implants were placed in 123 patients aged between 44 and 68 years. There were 33 men and 90 women and they all recovered. The IAN was mobilised by one of two procedures, one that involves the nerve directly (transposition) and one that does not (lateralisation). During lateralisation the nerve is deflected laterally through a mandibular osteotomy, while the mental nerve and mental foramen are not manipulated. The resulting hypoaesthetic area was drawn on a graph to assess its extension. Although different techniques are available for placing implants in atrophic jaws, mobilisation of the IAN is indicated in certain cases in which other techniques are not feasible or have a high risk of complications.


Assuntos
Prótese Ancorada no Osso , Nervo Mandibular , Adulto , Idoso , Implantação Dentária Endóssea , Feminino , Humanos , Masculino , Mandíbula , Pessoa de Meia-Idade , Estudos Retrospectivos , Traumatismos do Nervo Trigêmeo
10.
Pathobiology ; 75(2): 85-94, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18544963

RESUMO

Hereditary breast cancer arising in carriers of mutations in the BRCA1 and BRCA2 genes differs from sporadic breast cancer and from non-BRCA1/2 familial breast carcinomas. Most BRCA1 carcinomas have the basal-like phenotype and are high-grade, highly proliferating, estrogen receptor-negative and HER2-negative breast carcinomas, characterized by the expression of basal markers such as basal keratins, P-cadherin and epidermal growth factor receptor. BRCA1 carcinomas frequently carry p53 mutations. The basal-like phenotype is only occasionally found in BRCA2 carcinomas, which tend to be estrogen and progesterone receptor positive. BRCA1 and BRCA2 loss of heterozygosity is found in almost all BRCA1 and BRCA2 carcinomas, respectively. Both genotypes have a low frequency of HER2 expression/amplification. In addition, comparative genomic hybridization and array expression studies have revealed differences in chromosomal gains and losses as well as expression patterns between genotypes. Several studies have shown that hereditary carcinomas that are not attributable to BRCA1/2 mutations are heterogeneous and have phenotypic similarities to BRCA2 tumors. A small group of cases are secondary to mutations in other breast cancer susceptibility genes, such as p53, PTEN or CDH1. As a result of the low frequency of breast carcinomas attributable to mutations in these genes, it is very difficult to establish a specific phenotype for each genotype, other than the association of lobular carcinomas with CDH1 germline mutations. The pathological and molecular features of hereditary breast cancer can drive specific treatments and influence the process of mutation screening.


Assuntos
Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Predisposição Genética para Doença , Proteína BRCA1/genética , Proteína BRCA2/genética , Feminino , Humanos , Mutação/genética
11.
Rev Esp Anestesiol Reanim (Engl Ed) ; 65(2): 90-95, 2018 Feb.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-29110890

RESUMO

INTRODUCTION: The extracorporeal oxygenation membrane (ECMO) is a system that provides circulatory and respiratory assistance to patients in cardiac or respiratory failure refractory to conventional treatment. It is a therapy with numerous associated complications and high mortality. Multidisciplinary management and experienced teams increase survival. OBJECTIVE: Our purpose is to evaluate and analyse the effect of the learning curve on mortality. METHODS: Retrospective and observational study of 31 patients, from January 2012 to December 2015. Patients were separated into 2periods. These periods were divided by the establishment of an ECMO protocol. We compared the quantitative variables by performing the Mann-Whitney U test. For the categorical qualitative variables we performed the chi-square test or Fisher exact statistic as appropriate. The survival curve was computed using the Kaplan-Meier method, and the analysis of statistical significance using the Log-rank test. Data analysis was performed with the STATA programme 14. RESULTS: Survival curves show the tendency to lower mortality in the subsequent period (P=0.0601). The overall mortality rate in the initial period was higher than in the subsequent period (P=0.042). In another analysis, we compared the characteristics of the 2groups and concluded that they were homogeneous. CONCLUSION: The degree of experience is an independent factor for mortality. The application of a care protocol is fundamental to facilitate the management of ECMO therapy.


Assuntos
Oxigenação por Membrana Extracorpórea/mortalidade , Adulto , Protocolos Clínicos , Oxigenação por Membrana Extracorpórea/efeitos adversos , Oxigenação por Membrana Extracorpórea/educação , Oxigenação por Membrana Extracorpórea/métodos , Feminino , Insuficiência Cardíaca/mortalidade , Insuficiência Cardíaca/terapia , Hemorragia/etiologia , Hemorragia/mortalidade , Mortalidade Hospitalar , Humanos , Estimativa de Kaplan-Meier , Curva de Aprendizado , Masculino , Pessoa de Meia-Idade , Insuficiência Respiratória/mortalidade , Insuficiência Respiratória/terapia , Estudos Retrospectivos , Fatores de Risco
12.
Arch Soc Esp Oftalmol ; 92(11): 521-527, 2017 Nov.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-28601375

RESUMO

OBJECTIVE: To assess the quality of life in glaucoma patients and normal subjects, and to assess its relationship with the severity of damage in each eye. METHODS: A cross-sectional study was conducted with prospective selection of cases. The study included 464 subjects and were distributed into 4categories. Subjects included in group 1 had both eyes normal, that is with a normal intraocular pressure (IOP), optic disk and visual fields (VF), or mild glaucoma, defined as untreated IOP>21mmHg and abnormal VF with mean defect (MD) over -6dB. Group 2 consisted of patients with both eyes with mild or moderate glaucoma, defined as untreated IOP>21mmHg and abnormal VF with MD between -6 and -12dB. Group 3 included patients with moderate to severe glaucoma, that is, untreated IOP>21mmHg and abnormal VF with MD of less than -12dB in both eyes. Group 4 consisted of patients with asymmetric glaucoma damage, that is, they had one eye with severe glaucoma and the other eye normal or with mild glaucoma. All subjects completed 3 different questionnaires. Global quality of life was evaluated with EuroQol-5D (EQ-5D). Vision related quality of life was assessed with Visual Function Questionnaire (VFQ-25). Quality of life related to ocular surface disease was measured with Ocular Surface Disease Index (OSDI). RESULTS: VFQ-25 showed that group 3 had significantly lower scores than group 1 in mental health (P=.006), dependence (P=.006), colour vision (P=.002), and peripheral vision (P=.002). EQ-5D showed no significant differences between any group, but a trend was found to greater difficulty in group 3 than in groups 1 and 2, and in all dimensions. OSDI showed a higher score, or which was the same as a major disability, in groups 2 and 3 than group 1 (P=.021 and P=.014, respectively). VFQ-25 only found significant differences between group 1 and group 4. Dimensions with significant differences were found between group 1 and 3 (both eyes with advanced or moderate glaucoma). These were not found between group 1 and group 4 (the group in which one eye has only mild glaucoma or no glaucoma). This finding confirms that the eye with less glaucoma damage determines the quality of life. CONCLUSIONS: Our results demonstrate that quality of life is impaired in patients with glaucoma, and this alteration is greater the more advanced is glaucoma damage in the best or both eyes.


Assuntos
Glaucoma , Qualidade de Vida , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Feminino , Glaucoma/diagnóstico , Humanos , Masculino , Pessoa de Meia-Idade , Índice de Gravidade de Doença , Adulto Jovem
13.
Circ Res ; 91(3): 202-9, 2002 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-12169645

RESUMO

The relative importance of cyclophilin (CyP) versus calcineurin (Cn)-mediated mechanisms in the effect of cyclosporin A (CsA) on endothelial cells (ECs) is largely unknown. In cultured ECs, CsA was cytotoxic/proapoptotic or cytoprotective/antiapoptotic at high or low concentrations, respectively. CsA analogs (MeVal-4-CsA and MeIle-4-CsA), which bind to CyP but do not inhibit Cn, closely reproduced the CsA effects. Based on our previous data, the role of vascular endothelial growth factor (VEGF) as a mediator of CsA-induced cytoprotection was further analyzed. The actions of CsA and CsA analogs were shifted from a protective to a cell-damaging pattern in the presence of a specific anti-VEGF monoclonal antibody (mAb). This positive interaction was further supported by a transient increase in cytosolic free calcium concentration ([Ca(2+)](i)) by VEGF after pretreatment with either CsA or MeVal-4-CsA and an increase in the expression and synthesis of VEGF receptor 2 (VEGFR2). Of functional importance, blockade of the interaction between VEGF and VEGFR2 by a VEGFR2 mAb abolished the cytoprotective effect of CsA. In addition, preconditioning with low concentrations of CsA or CsA analogs increased both cytoprotection and VEGFR2 mRNA expression when EC were exposed to higher concentrations of CsA. In summary, our results reveal that (1) the biphasic responses to CsA in EC are related to the interaction of CsA with CyP rather than with Cn and (2) VEGF is a critical factor in the cytoprotective effect of CsA, by a mechanism that involves VEGFR2.


Assuntos
Ciclofilinas/fisiologia , Ciclosporina/farmacologia , Fatores de Crescimento Endotelial/fisiologia , Endotélio Vascular/efeitos dos fármacos , Linfocinas/fisiologia , Proteínas Nucleares , Transdução de Sinais , Animais , Calcineurina/fisiologia , Cálcio/metabolismo , Bovinos , Células Cultivadas , Ciclosporina/toxicidade , Citoproteção , Proteínas de Ligação a DNA/metabolismo , Relação Dose-Resposta a Droga , Fatores de Crescimento Endotelial/genética , Fatores de Crescimento Endotelial/farmacologia , Endotélio Vascular/metabolismo , Cinética , Linfocinas/genética , Linfocinas/farmacologia , Fatores de Transcrição NFATC , RNA Mensageiro/biossíntese , Receptores Proteína Tirosina Quinases/genética , Receptores Proteína Tirosina Quinases/fisiologia , Receptores de Fatores de Crescimento/genética , Receptores de Fatores de Crescimento/fisiologia , Receptores de Fatores de Crescimento do Endotélio Vascular , Fatores de Transcrição/metabolismo , Fator A de Crescimento do Endotélio Vascular , Fatores de Crescimento do Endotélio Vascular
14.
Arch Soc Esp Oftalmol ; 81(9): 509-16, 2006 Sep.
Artigo em Espanhol | MEDLINE | ID: mdl-17016782

RESUMO

OBJECTIVE: The prevalence of cataracts has increased due to the progressive ageing of the population and the fact that cataracts affect a wide and increasing proportion of the population. The goal of the present study was to describe the prevalence of cataracts through a systematic and exhaustive review of population-based studies. METHODS: A systematic review of population-based studies of the prevalence and incidence of cataracts was performed. Inclusion criteria were: a healthy non- institutionalised population, older than 40 years of age, of white race, with a sample size of greater than 1,000 and published between 1980 and 2002. RESULTS: Ten studies met the inclusion criteria (3 European, 5 from the United States and 2 from Australia), and were performed between 1984 and 2001. The cataract prevalence, according to lens opacity criteria, ranged between 15% and 19%. When the cataract was defined as a lens opacity combined with a decreased visual acuity, the prevalence ranged from 15% to 30%. The overall prevalence increased with age, reaching 40% and more than 60% in populations older than 70 and 75 years respectively. The prevalence among women was higher than that among men, with a more marked increase being evident at older ages than for men. CONCLUSIONS: There were variations among the criteria used to measure the prevalence of cataract, which made it difficult to compare all the studies. Overall the prevalence was higher in the older population, especially among women. The increasing prevalence associated with age predicts an increasing burden of cataract to health services, this being particularly related to the ageing of the population.


Assuntos
Catarata/epidemiologia , Adulto , Distribuição por Idade , Idoso , Idoso de 80 Anos ou mais , Estudos Epidemiológicos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência , Distribuição por Sexo
15.
Cancer Res ; 46(12 Pt 1): 6246-9, 1986 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-3096557

RESUMO

alpha-Difluoromethylornithine (DFMO) and methyl acetylene putrescine (MAP) are inhibitors of the rate limiting enzyme in polyamine synthesis, ornithine decarboxylase. We studied the effects of these compounds on the formation of retrovirus transformed erythroid colonies. DFMO was able to effectively reduce the number of transformed colonies at a concentration of 10(-3) M, whereas MAP achieved total inhibition at 10(-4) M. Putrescine, the product of ornithine decarboxylase, did not alter colony number by itself but it was able to overcome the inhibitory effects of both DFMO and MAP. Addition of DFMO at times after the initiation of culture decreased its effectiveness in reducing transformed colony numbers, while the converse was true for the erythroid stimulant, erythropoietin. We concluded from these data that DFMO and MAP probably diminished colony formation by inhibiting proliferation of the target cells for the retroviruses.


Assuntos
Transformação Celular Viral/efeitos dos fármacos , Eflornitina/farmacologia , Eritrócitos/efeitos dos fármacos , Células-Tronco Hematopoéticas/efeitos dos fármacos , Inibidores da Ornitina Descarboxilase , Putrescina/análogos & derivados , Animais , Divisão Celular/efeitos dos fármacos , Eritropoetina/farmacologia , Camundongos , Putrescina/farmacologia , Retroviridae
16.
Trop Biomed ; 33(2): 375-382, 2016 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-33579106

RESUMO

Dengue disease statistics is mainly based on consulting patients with febrile illness, but misdiagnosed and asymptomatic cases are important to measure dengue epidemiology in endemic areas. The main objective of this work was to determine the prevalence of IgM and IgG antibodies or NS1 antigen and viral RNA in a group of healthy volunteers from an isolated village in Colombian Chocó rain forest. It found 51.7% of virologically PCR confirmed asymptomatic cases, despite low IgM seroprevalence. It was confirmed that all four serotypes are in the circulation and in 17.2% of individuals it detected natural coinfections of two or three different serotypes simultaneously. This is the first report in Colombia evaluating viremia in asymptomatic volunteers. These findings pose a big concern about the transmission of dengue virus by asymptomatic individuals because they can spread the virus without take appropriate control measures.

17.
Oncogene ; 35(21): 2777-88, 2016 05.
Artigo em Inglês | MEDLINE | ID: mdl-26387546

RESUMO

The spinophilin (Spn, PPP1R9B) gene is located at 17q21.33, a region frequently associated with microsatellite instability and loss of heterozygosity, especially in breast tumors. Spn is a regulatory subunit of phosphatase1a (PP1), which targets the catalytic subunit to distinct subcellular locations. Spn downregulation reduces PPP1CA activity against the retinoblastoma protein, pRb, thereby maintaining higher levels of phosphorylated pRb. This effect contributes to an increase in the tumorigenic properties of cells in certain contexts. Here, we explored the mechanism of how Spn downregulation contributes to the malignant phenotype and poor prognosis in breast tumors and found an increase in the stemness phenotype. Analysis of human breast tumors showed that Spn mRNA and protein are reduced or lost in 15% of carcinomas, correlating with a worse prognosis, a more aggressive tumor phenotype and triple-negative tumors, whereas luminal tumors showed high Spn levels. Downregulation of Spn by shRNA increased the stemness properties along with the expression of stem-related genes (Sox2, KLF4, Nanog and OCT4), whereas ectopic overexpression of Spn cDNA reduced these properties. Breast tumor stem cells appeared to have low levels of Spn mRNA, and Spn loss correlated with increased stem-like cell appearance in breast tumors as indicated by an increase in CD44+/CD24- cells. A reduction of the levels of PPP1CA mimicked the cancer stem-like cell phenotype of Spn downregulation, suggesting that the mechanism of Spn involves PP1a. These increased cancer stem cell-like properties with reduced Spn might account for the malignant phenotype observed in Spn-loss tumors and may contribute to a worse patient prognosis.


Assuntos
Neoplasias da Mama/patologia , Proteínas dos Microfilamentos/deficiência , Células-Tronco Neoplásicas/patologia , Proteínas do Tecido Nervoso/deficiência , Animais , Neoplasias da Mama/metabolismo , Linhagem Celular Tumoral , Estudos de Coortes , Feminino , Humanos , Fator 4 Semelhante a Kruppel , Proteínas dos Microfilamentos/genética , Proteínas dos Microfilamentos/metabolismo , Células-Tronco Neoplásicas/metabolismo , Proteínas do Tecido Nervoso/genética , Proteínas do Tecido Nervoso/metabolismo , Prognóstico
18.
Burns ; 42(8): 1861-1866, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27364090

RESUMO

Electrical injuries and especially those of high voltage still remain a source of high morbidity. Over the past few years, a change in the epidemiologic profile of these lesions was noticed at the Vall d'Hebron University Hospital Burn Unit, corresponding to an increase in cases out of the legal framework. It is our aim to describe this particular subset, to determine the extent of their injuries and to understand the reason for their increased incidence. We think this was favoured by the rise in the unemployment rate, along with higher copper prices.


Assuntos
Acidentes Domésticos/estatística & dados numéricos , Queimaduras por Corrente Elétrica/epidemiologia , Recessão Econômica , Traumatismos Ocupacionais/epidemiologia , Roubo/estatística & dados numéricos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Amputação Cirúrgica , Queimaduras por Corrente Elétrica/complicações , Queimaduras por Corrente Elétrica/cirurgia , Criança , Pré-Escolar , Síndromes Compartimentais/etiologia , Síndromes Compartimentais/cirurgia , Cobre , Desbridamento , Fasciotomia , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Distribuição por Sexo , Transplante de Pele , Espanha/epidemiologia , Desemprego/estatística & dados numéricos , Adulto Jovem
19.
Rev. chil. neuro-psiquiatr ; 59(3): 218-224, sept. 2021.
Artigo em Espanhol | LILACS | ID: biblio-1388391

RESUMO

INTRODUCCIÓN: La enfermedad cerebrovascular es un conjunto de alteraciones atribuidas a lesiones agudas y focales en el sistema nervioso central, en su mayoría secundaria a aterosclerosis DESARROLLO: En la prevención de la enfermedad cerebrovascular, existen dos grandes grupos farmacológicos, los antitromboticos y los anti plaquetarios, los cuales impactan en la calidad de vida de estos pacientes mejorando el pronóstico de los mismos. CONCLUSIONES: La enfermedad cerebrovascular comparte factores de riesgo de enfermedad tromboembólica, por lo que se recomienda iniciar profilaxis.


INTRODUCTION: Cerebrovascular disease is a group of alterations attributed to acute and focal lesions in the central nervous system, mostly secondary to atherosclerosis. DEVELOPMENT: In the prevention of cerebrovascular disease, there are two major pharmacological groups, antithrombotics and antiplatelet drugs. , which impact the quality of life of these patients, improving their prognosis. CONCLUSIONS: Cerebrovascular disease shares risk factors for thromboembolic disease, so it is recommended to start prophylaxis.


Assuntos
Humanos , Tromboembolia/prevenção & controle , Transtornos Cerebrovasculares/prevenção & controle , Antibioticoprofilaxia/métodos , Tromboembolia/etiologia , Inibidores da Agregação Plaquetária/administração & dosagem , Acidente Vascular Cerebral , Embolia , Aterosclerose/complicações , Anticoagulantes/administração & dosagem
20.
Rev. neurol. (Ed. impr.) ; 72(10): 352-356, May 16, 2021. tab
Artigo em Espanhol | IBECS (Espanha) | ID: ibc-227877

RESUMO

Introducción: Se considera ictus minor a aquel que se presenta con escasos síntomas; sin embargo, hasta un 40% presenta discapacidad a largo plazo. La tasa de trombólisis en estos pacientes también es inferior a la del resto de ictus. En este estudio se pretende explorar si existen diferencias en los tiempos de atención en la trombólisis intravenosa en los pacientes con ictus minor. Material y métodos. Revisión retrospectiva de los ictus tratados con trombólisis intravenosa en nuestro centro y análisis comparativo de los tiempos de asistencia entre ictus minor y el resto. Resultados: Se encontraron tiempos más alargados en los casos de ictus minor en cuanto al tiempo puerta-tomografía computarizada y puerta-aguja. No fue así, sin embargo, para el tiempo desde el inicio de los síntomas hasta la llegada al hospital. Conclusiones: La presencia de escasos síntomas en el ictus minor puede hacer difícil su reconocimiento y podría ser un motivo de retraso en el tratamiento. La formación entre el personal que atiende a estos pacientes es fundamental para mejorar este aspecto.(AU)


Introduction: Minor strokes are considered to be those that present with few symptoms, although up to 40% of them entail long-term disability. The rate of thrombolysis in these patients is also lower than in other strokes. The aim of this study is to explore whether there are any differences in intravenous thrombolysis care times in minor strokes. Patients and methods: We conducted a retrospective review of strokes treated with intravenous thrombolysis at our centre and a comparative analysis of the care times in minor strokes and in the other types. Results: Longer times were found in minor strokes in terms of door-to-CT scan and door-to-needle time. This was not the case, however, for the time from the onset of symptoms to arrival at the hospital. Conclusions: The presence of few symptoms in minor strokes can make them difficult to recognise and could be a reason for delaying treatment. Training among staff caring for these patients is essential to improve this aspect.(AU)


Assuntos
Humanos , Masculino , Feminino , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica/métodos , Administração Intravenosa , Tempo para o Tratamento , Neurologia , Doenças do Sistema Nervoso , Estudos Retrospectivos , Epidemiologia Descritiva
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