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1.
Nucleic Acids Res ; 52(W1): W29-W38, 2024 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-38795068

RESUMO

Gene therapy of dominantly inherited genetic diseases requires either the selective disruption of the mutant allele or the editing of the specific mutation. The CRISPR-Cas system holds great potential for the genetic correction of single nucleotide variants (SNVs), including dominant mutations. However, distinguishing between single-nucleotide variations in a pathogenic genomic context remains challenging. The presence of a PAM in the disease-causing allele can guide its precise targeting, preserving the functionality of the wild-type allele. The AlPaCas (Aligning Patients to Cas) webserver is an automated pipeline for sequence-based identification and structural analysis of SNV-derived PAMs that satisfy this demand. When provided with a gene/SNV input, AlPaCas can: (i) identify SNV-derived PAMs; (ii) provide a list of available Cas enzymes recognizing the SNV (s); (iii) propose mutational Cas-engineering to enhance the selectivity towards the SNV-derived PAM. With its ability to identify allele-specific genetic variants that can be targeted using already available or engineered Cas enzymes, AlPaCas is at the forefront of advancements in genome editing. AlPaCas is open to all users without a login requirement and is freely available at https://schubert.bio.uniroma1.it/alpacas.


Assuntos
Alelos , Sistemas CRISPR-Cas , Edição de Genes , Edição de Genes/métodos , Humanos , Polimorfismo de Nucleotídeo Único , Mutação , Software , Internet , Motivos de Nucleotídeos , Camelídeos Americanos/genética
2.
N Engl J Med ; 385(24): 2264-2270, 2021 12 09.
Artigo em Inglês | MEDLINE | ID: mdl-34881838

RESUMO

Inherited junctional epidermolysis bullosa is a severe genetic skin disease that leads to epidermal loss caused by structural and mechanical fragility of the integuments. There is no established cure for junctional epidermolysis bullosa. We previously reported that genetically corrected autologous epidermal cultures regenerated almost an entire, fully functional epidermis on a child who had a devastating form of junctional epidermolysis bullosa. We now report long-term clinical outcomes in this patient. (Funded by POR FESR 2014-2020 - Regione Emilia-Romagna and others.).


Assuntos
Epiderme/transplante , Epidermólise Bolhosa Juncional/terapia , Queratinócitos/transplante , Transdução Genética , Transgenes , Autorrenovação Celular , Células Cultivadas/transplante , Criança , Células Clonais , Epiderme/patologia , Epidermólise Bolhosa Juncional/genética , Epidermólise Bolhosa Juncional/patologia , Seguimentos , Doenças Genéticas Inatas/patologia , Doenças Genéticas Inatas/terapia , Terapia Genética , Vetores Genéticos , Humanos , Queratinócitos/citologia , Queratinócitos/fisiologia , Masculino , Regeneração , Células-Tronco/fisiologia , Transplante Autólogo
3.
Anal Chem ; 96(15): 5790-5797, 2024 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-38452224

RESUMO

Nanoplastic particles are emerging as an important class of environmental pollutants in the atmosphere that have adverse effects on our ecosystems and human health. While many methods have been developed to quantitatively detect nanoplastics; however, sensitive detection at low concentrations in a complex environment remains elusive. Herein, we demonstrate a greener method to fabricate a surface-enhanced Raman spectroscopy (SERS) substrate consisting of self-assembled plasmonic Ag-Au bimetallic nanoparticle (NP) films for quantitative SERS detection of nanoplastics in complex media. The self-assembly of Ag-Au bimetallic NPs was achieved through thermal evaporation onto a vapor-phase compatible ionic liquid based on deep eutectic solvent over the growth substrate. The finite-difference time-domain simulation revealed that the localized field enhancement is strong in the gaps, which generate uniform SERS "hotspots" in the obtained substrate. Benefiting from highly accessible SERS "hotspots" at the gaps, the SERS substrate exhibits excellent sensitivity for detecting crystal violet with a limit of detection (LOD) as low as 10-14 M and excellent reproducibility (RSD of 5.8%). The SERS substrate is capable of detecting PET nanoplastics with LOD as low as 1 µg/mL and about 100 µg/mL in real samples such as tap water, lake water, diluted milk, and wine. Moreover, we also validated the feasibility of the designed SERS substrate for the practical detection of PET nanoplastics collected from commercial drinking water bottles, and it showed great potential applications for sensitive detection in actual environments.

4.
Plant Biotechnol J ; 2024 Apr 04.
Artigo em Inglês | MEDLINE | ID: mdl-38572508

RESUMO

Climate change may result in a drier climate and increased salinization, threatening agricultural productivity worldwide. Quinoa (Chenopodium quinoa) produces highly nutritious seeds and tolerates abiotic stresses such as drought and high salinity, making it a promising future food source. However, the presence of antinutritional saponins in their seeds is an undesirable trait. We mapped genes controlling seed saponin content to a genomic region that includes TSARL1. We isolated desired genetic variation in this gene by producing a large mutant library of a commercial quinoa cultivar and screening the library for specific nucleotide substitutions using droplet digital PCR. We were able to rapidly isolate two independent tsarl1 mutants, which retained saponins in the leaves and roots for defence, but saponins were undetectable in the seed coat. We further could show that TSARL1 specifically controls seed saponin biosynthesis in the committed step after 2,3-oxidosqualene. Our work provides new important knowledge on the function of TSARL1 and represents a breakthrough for quinoa breeding.

5.
Eur J Clin Microbiol Infect Dis ; 43(3): 489-499, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38195783

RESUMO

INTRODUCTION: Dead space management following debridement surgery in chronic osteomyelitis or septic non-unions is one of the most crucial and discussed steps for the success of the surgical treatment of these conditions. In this retrospective clinical study, we described the efficacy and safety profile of surgical debridement and local application of S53P4 bioactive glass (S53P4 BAG) in the treatment of bone infections. METHODS: A consecutive single-center series of 38 patients with chronic osteomyelitis (24) and septic non-unions (14), treated with bioactive glass S53P4 as dead space management following surgical debridement between May 2015 and November 2020, were identified and evaluated retrospectively. RESULTS: Infection eradication was reached in 22 out of 24 patients (91.7%) with chronic osteomyelitis. Eleven out of 14 patients (78.6%) with septic non-union achieved both fracture healing and infection healing in 9.1 ± 4.9 months. Three patients (7.9%) developed prolonged serous discharge with wound dehiscence but healed within 2 months with no further surgical intervention. Average patient follow-up time was 19.8 months ± 7.6 months. CONCLUSION: S53P4 bioactive glass is an effective and safe therapeutic option in the treatment of chronic osteomyelitis and septic non-unions because of its unique antibacterial properties, but also for its ability to generate a growth response in the remaining healthy bone at the bone-glass interface.


Assuntos
Substitutos Ósseos , Osteomielite , Humanos , Estudos Retrospectivos , Substitutos Ósseos/uso terapêutico , Antibacterianos/uso terapêutico , Infecção Persistente , Osteomielite/tratamento farmacológico , Osteomielite/cirurgia , Osteomielite/microbiologia
6.
Neurol Sci ; 2024 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-38607533

RESUMO

BACKGROUND: SPG18 is caused by mutations in the endoplasmic reticulum lipid raft associated 2 (ERLIN2) gene. Autosomal recessive (AR) mutations are usually associated with complicated hereditary spastic paraplegia (HSP), while autosomal dominant (AD) mutations use to cause pure SPG18. AIM: To define the variegate clinical spectrum of the SPG18 and to evaluate a dominant negative effect of erlin2 (encoded by ERLIN2) on oligomerization as causing differences between AR and AD phenotypes. METHODS: In a four-generation pedigree with an AD pattern, a spastic paraplegia multigene panel test was performed. Oligomerization of erlin2 was analyzed with velocity gradient assay in fibroblasts of the proband and healthy subjects. RESULTS: Despite the common p.V168M mutation identified in ERLIN2, a phenoconversion to amyotrophic lateral sclerosis (ALS) was observed in the second generation, pure HSP in the third generation, and a complicated form with psychomotor delay and epilepsy in the fourth generation. Erlin2 oligomerization was found to be normal. DISCUSSION: We report the first AD SPG18 family with a complicated phenotype, and we ruled out a dominant negative effect of V168M on erlin2 oligomerization. Therefore, our data do not support the hypothesis of a relationship between the mode of inheritance and the phenotype, but confirm the multifaceted nature of SPG18 on both genetic and clinical point of view. Clinicians should be aware of the importance of conducting an in-depth clinical evaluation to unmask all the possible manifestations associated to an only apparently pure SPG18 phenotype. We confirm the genotype-phenotype correlation between V168M and ALS emphasizing the value of close follow-up.

7.
Pediatr Cardiol ; 45(2): 300-308, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38167967

RESUMO

 In neonatal, symptomatic tetralogy of Fallot (sTOF), data are lacking on whether high-risk groups would benefit from staged (SR) or complete repair (CR). We studied the association of gestational age (GA) at birth and z-score for birth weight (BWz), with management strategy and outcomes in sTOF. California population-based cohort study (2011-2017) of infants with sTOF (defined as catheter or surgical intervention prior to 44 weeks corrected GA) was performed, comparing management strategy and timing by GA and BWz categories. Multivariable models evaluated composite outcomes and days alive and out of hospital (DAOOH) in the first year of life. Among 345 patients (SR = 194; CR = 151), management strategy did not differ by GA or BWz with complete repair defined as prior to 44 weeks corrected gestational age; however, did differ by GA with regard to complete/timely repair (defined as complete repair within first 30 days of life). Full-term and early-term neonates underwent CR 20 (95%CI: - 27.1, - 14.1; p < 0.001) and 15 days (95%CI: - 22.1, - 8.2; p < 0.001) sooner than preterm neonates. Prematurity and major anomaly were associated with mortality or non-cardiac morbidity, while only major anomaly was associated with mortality or cardiac morbidity (OR = 3.5, 95%CI: 1.8,6.7, p < .0001). Full-term infants had greater DAOOH compared to preterm infants (35.2 days, 95%CI: 4.0, 66.5, p = 0.03). LGA infants and those with major anomaly had significantly lower DAOOH. In sTOF, patient specific risk factors such as prematurity and major anomaly were more associated with outcomes than management strategy.


Assuntos
Tetralogia de Fallot , Lactente , Recém-Nascido , Humanos , Tetralogia de Fallot/cirurgia , Recém-Nascido Prematuro , Idade Gestacional , Estudos de Coortes , Peso ao Nascer
8.
Cardiol Young ; : 1-8, 2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38653722

RESUMO

INTRODUCTION: Disparities in CHD outcomes exist across the lifespan. However, less is known about disparities for patients with CHD admitted to neonatal ICU. We sought to identify sociodemographic disparities in neonatal ICU admissions among neonates born with cyanotic CHD. MATERIALS & METHODS: Annual natality files from the US National Center for Health Statistics for years 2009-2018 were obtained. For each neonate, we identified sex, birthweight, pre-term birth, presence of cyanotic CHD, and neonatal ICU admission at time of birth, as well as maternal age, race, ethnicity, comorbidities/risk factors, trimester at start of prenatal care, educational attainment, and two measures of socio-economic status (Special Supplemental Nutrition Program for Women, Infants, and Children [WIC] status and insurance type). Multivariable logistic regression models were fit to determine the association of maternal socio-economic status with neonatal ICU admission. A covariate for race/ethnicity was then added to each model to determine if race/ethnicity attenuate the relationship between socio-economic status and neonatal ICU admission. RESULTS: Of 22,373 neonates born with cyanotic CHD, 77.2% had a neonatal ICU admission. Receipt of WIC benefits was associated with higher odds of neonatal ICU admission (adjusted odds ratio [aOR] 1.20, 95% CI 1.1-1.29, p < 0.01). Neonates born to non-Hispanic Black mothers had increased odds of neonatal ICU admission (aOR 1.20, 95% CI 1.07-1.35, p < 0.01), whereas neonates born to Hispanic mothers were at lower odds of neonatal ICU admission (aOR 0.84, 95% CI 0.76-0.93, p < 0.01). CONCLUSION: Maternal Black race and low socio-economic status are associated with increased risk of neonatal ICU admission for neonates born with cyanotic CHD. Further work is needed to identify the underlying causes of these disparities.

9.
Aesthetic Plast Surg ; 2024 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-38862660

RESUMO

This response letter answers a query regarding our study on the use of the Midjourney app in aesthetic surgery. The original study questioned the utility of Midjourney in enhancing surgical skills, patient understanding, and communication effectiveness. The response highlights the challenges and potential of AI in medical visualization, advocating for meticulous development and evaluation. It stresses the importance of the scientific community's role in educating the public about the reliability and appropriate use of new technologies to avoid misconceptions and ensure the safe integration of AI in advancing medical fields like aesthetic surgery. The authors advocate for ongoing research and thoughtful application of AI tools, acknowledging both their benefits and limitations in the medical context.Level of Evidence V This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

10.
Evol Dev ; 25(6): 418-429, 2023 11.
Artigo em Inglês | MEDLINE | ID: mdl-37243316

RESUMO

While niche construction theory and developmental approaches to evolution have brought to the front the active role of organisms as ecological and developmental agents, respectively, the role of agents in reproduction has been widely neglected by organismal perspectives of evolution. This paper addresses this problem by proposing an agential view of reproduction and shows that such a perspective has implications for the explanation of the origin of modes of reproduction, the evolvability of reproductive modes, and the coevolution between reproduction and social behavior. After introducing the two prevalent views of agency in evolutionary biology, namely those of organismal agency and selective agency, I contrast these two perspectives as applied to the evolution of animal reproduction. Taking eutherian pregnancy as a case study, I wonder whether organismal approaches to agency forged in the frame of niche construction and developmental plasticity theories can account for the goal-directed activities involved in reproductive processes. I conclude that the agential role of organisms in reproduction is irreducible to developmental and ecological agency, and that reproductive goals need to be included into our definitions of organismal agency. I then explore the evolutionary consequences of endorsing an agential approach to reproduction, showing how such an approach might illuminate our understanding of the evolutionary origination and developmental evolvability of reproductive modes. Finally, I analyze recent studies on the coevolution between viviparity and social behavior in vertebrates to suggest that an agential notion of reproduction can provide unforeseen links between developmental and ecological agency.


Assuntos
Evolução Biológica , Vertebrados , Animais , Comportamento Social , Reprodução , Biologia do Desenvolvimento
11.
Naturwissenschaften ; 110(6): 52, 2023 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-37889338

RESUMO

Anthropogenic land use and climate change are the greatest threats to biodiversity, especially for many globally endangered reptile species. Earth snakes (Conopsis spp.) are a poorly studied group endemic to Mexico. They have limited dispersal abilities and specialized niches, making them particularly vulnerable to anthropogenic threats. Species distribution models (SDMs) were used to assess how future climate and land-cover change scenarios might influence the distribution and habitat connectivity of three earth snakes: Conopsis biserialis (Taylor and Smith), C. lineata (Kennicott), and C. nasus (Günther). Two climate models, CNRM-CM5 (CN) and MPI-ESM-LR (MP) (Representative Concentration Pathway 85), were explored with ENMeval Maxent modelling. Important SDM environmental variables and environmental niche overlap between species were also examined. We found that C. biserialis and C. lineata were restricted by maximum temperatures whereas C. nasus was restricted by minimum ones and was more tolerant to arid vegetation. C. biserialis and C. lineata were primarily distributed in the valleys and mountains of the highlands of the TMBV, while C. nasus was mainly distributed in the Altiplano Sur (Zacatecano-Potosino). C. lineata had the smallest potential distribution and suffered the greatest contraction in the future whereas C. nasus was the least affected species in future scenarios. The Sierra de las Cruces and the Sierra Chichinautzin were identified as very important areas for connectivity. Our results suggest that C. lineata may be the most vulnerable of the three species to anthropogenic and climate changes whereas C. nasus seems to be less affected by global warming than the other species.


Assuntos
Biodiversidade , Ecossistema , México , Mudança Climática
12.
Nature ; 551(7680): 327-332, 2017 11 16.
Artigo em Inglês | MEDLINE | ID: mdl-29144448

RESUMO

Junctional epidermolysis bullosa (JEB) is a severe and often lethal genetic disease caused by mutations in genes encoding the basement membrane component laminin-332. Surviving patients with JEB develop chronic wounds to the skin and mucosa, which impair their quality of life and lead to skin cancer. Here we show that autologous transgenic keratinocyte cultures regenerated an entire, fully functional epidermis on a seven-year-old child suffering from a devastating, life-threatening form of JEB. The proviral integration pattern was maintained in vivo and epidermal renewal did not cause any clonal selection. Clonal tracing showed that the human epidermis is sustained not by equipotent progenitors, but by a limited number of long-lived stem cells, detected as holoclones, that can extensively self-renew in vitro and in vivo and produce progenitors that replenish terminally differentiated keratinocytes. This study provides a blueprint that can be applied to other stem cell-mediated combined ex vivo cell and gene therapies.


Assuntos
Células Epidérmicas , Epidermólise Bolhosa Juncional/terapia , Regeneração , Células-Tronco/citologia , Células-Tronco/metabolismo , Transgenes/genética , Moléculas de Adesão Celular/genética , Moléculas de Adesão Celular/metabolismo , Diferenciação Celular , Linhagem da Célula , Autorrenovação Celular , Rastreamento de Células , Criança , Células Clonais/citologia , Células Clonais/metabolismo , Derme/citologia , Derme/patologia , Epiderme/patologia , Epidermólise Bolhosa Juncional/genética , Epidermólise Bolhosa Juncional/metabolismo , Epidermólise Bolhosa Juncional/patologia , Humanos , Queratinócitos/citologia , Queratinócitos/metabolismo , Queratinócitos/transplante , Masculino , Provírus/genética , Calinina
13.
Pediatr Cardiol ; 44(6): 1232-1241, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36797379

RESUMO

Right ventricular (RV) dysfunction early after tetralogy of Fallot (TOF) increases post-operative morbidity. We investigated associations of circulating biomarkers and socioeconomic factors with early post-operative RV systolic function. Single-center prospective cohort study of infants undergoing TOF repair. Six serologic biomarkers of myocardial fibrosis and wall stress collected at the time of surgery were measured with immunoassay. Geocoding was performed for socioeconomic factors. Multivariate adaptive regression splines (MARS) models identified factors associated with RV function parameters: fractional area change (FAC), global longitudinal strain and strain rate, and free wall strain and strain rate. Seventy-one patients aged 3.5 months (IQR 2.4, 5.2) were included. Galectin-3 was the highest ranked predictor for FAC, global longitudinal strain, and free wall strain, and procollagen type-I carboxy-terminal propeptide (PICP) was the highest ranked predictor for global longitudinal strain rate and free wall strain rate. Several neighborhood characteristics were also highly ranked. Models adjusted R2 ranged from 0.71 to 0.85 (FAC, global longitudinal strain/strain rate), and 0.55-0.57 (RV free wall strain/strain rate). A combination of serologic biomarkers, socioeconomic, and clinical variables explain a significant proportion of the variability in RV function after TOF repair. These factors may inform pre-operative risk-stratification for these patients.


Assuntos
Tetralogia de Fallot , Disfunção Ventricular Direita , Lactente , Humanos , Função Ventricular Direita , Estudos Prospectivos , Biomarcadores , Fatores Socioeconômicos
14.
Cardiol Young ; 33(8): 1471-1473, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36636921

RESUMO

INTRODUCTION: Racial and ethnic disparities in resource use among children with CHD remain understudied. We sought to evaluate associations between race, ethnicity, and resource utilisation in children with CHD. MATERIALS AND METHODS: Annual data from the National Health Interview Survey were collected for years 2010-2018. Children with self-reported CHD and Non-Hispanic White race, Non-Hispanic Black race, or Hispanic ethnicity were identified. Resource use in the preceding year was identified with four measures: primary place of care visited when sick, receiving well-child checkups, number of emergency department visits, and number of office visits. Cohort characteristics were compared across racial and ethnic groups using Kruskal-Wallis and Fisher's exact tests. Multivariable logistic regression was used to determine the association of race and ethnicity with likelihood of having an emergency department visit. RESULTS: We identified 209 children for the primary analysis. Non-Hispanic Black children had significantly more emergency department visits in the prior year, with 11.1% having ≥6 emergency department visits compared to 0.7% and 5.6% of Non-Hispanic White and Hispanic children. Further, 35.2% of Hispanic children primarily received care at clinics/health centres, compared to 17% of Non-Hispanic White children and 11.1% of Non-Hispanic Black children (p = 0.03). On multivariable analysis, Black race was associated with higher odds of emergency department visit compared to White race (odds ratio = 4.19, 95% confidence interval = 1.35 to 13.04, p = 0.01). CONCLUSION: In a nationally comprehensive, contemporary cohort of children with CHD, there were some significant racial and ethnic disparities in resource utilisation. Further work is needed to consider the role of socio-economics and insurance status in perpetuating these disparities.


Assuntos
Serviço Hospitalar de Emergência , Utilização de Instalações e Serviços , Cardiopatias Congênitas , Humanos , Negro ou Afro-Americano/estatística & dados numéricos , Serviço Hospitalar de Emergência/estatística & dados numéricos , Etnicidade/estatística & dados numéricos , Utilização de Instalações e Serviços/estatística & dados numéricos , Cardiopatias Congênitas/epidemiologia , Cardiopatias Congênitas/etnologia , Cardiopatias Congênitas/terapia , Hispânico ou Latino/estatística & dados numéricos , Razão de Chances , Fatores Raciais , Estados Unidos/epidemiologia , Brancos/estatística & dados numéricos
15.
Semin Cancer Biol ; 73: 76-85, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-32805396

RESUMO

Cholesterol is a crucial component of membrane bilayers that determines their physical and functional properties. Cells largely satisfy their need for cholesterol through the novo synthesis from acetyl-CoA and this demand is particularly critical for cancer cells to sustain dysregulated cell proliferation. However, the association between serum or tissue cholesterol levels and cancer development is not well established as epidemiologic data do not consistently support this link. While most preclinical studies focused on the role of total celular cholesterol, the specific contribution of the mitochondrial cholesterol pool to alterations in cancer cell biology has been less explored. Although low compared to other bilayers, the mitochondrial cholesterol content plays an important physiological function in the synthesis of steroid hormones in steroidogenic tissues or bile acids in the liver and controls mitochondrial function. In addition, mitochondrial cholesterol metabolism generates oxysterols, which in turn, regulate multiple pathways, including cholesterol and lipid metabolism as well as cell proliferation. In the present review, we summarize the regulation of mitochondrial cholesterol, including its role in mitochondrial routine performance, cell death and chemotherapy resistance, highlighting its potential contribution to cancer. Of particular relevance is hepatocellular carcinoma, whose incidence in Western countries had tripled in the past decades due to the obesity and type II diabetes epidemic. A better understanding of the role of mitochondrial cholesterol in cancer development may open up novel opportunities for cancer therapy.


Assuntos
Colesterol/metabolismo , Metabolismo dos Lipídeos/fisiologia , Mitocôndrias/metabolismo , Neoplasias , Animais , Humanos , Neoplasias/metabolismo , Neoplasias/patologia
16.
Am J Physiol Cell Physiol ; 323(3): C896-C906, 2022 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-35912986

RESUMO

Cell therapy, gene therapy, and tissue engineering have the potential to revolutionize the field of regenerative medicine. In particular, gene therapy is understood as the therapeutical correction of mutated genes by addition of a correct copy of the gene or site-specific gene modifications. Gene correction of somatic stem cells sustaining renewing tissues is critical to ensure long-term clinical success of ex vivo gene therapy. To date, remarkable clinical outcomes arose from combined ex vivo cell and gene therapy of different genetic diseases, such as immunodeficiencies and genodermatoses. Despite the efforts of researchers around the world, only a few of these advanced approaches have yet made it to routine therapy. In fact, gene therapy poses one of the greatest technical challenges in modern medicine, spanning safety and efficacy issues, regulatory constraints, registration and market access, all of which need to be addressed to make the therapy available to patients with rare disease. In this review, we survey some of the main challenges in the development of combined cell and gene therapy of genetic skin diseases.


Assuntos
Edição de Genes , Terapia Genética , Terapia Baseada em Transplante de Células e Tecidos , Terapia Genética/efeitos adversos , Humanos , Medicina Regenerativa , Engenharia Tecidual
17.
Int J Mol Sci ; 23(9)2022 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-35563194

RESUMO

A set of guanine-rich aptamers able to preferentially recognize full-length huntingtin with an expanded polyglutamine tract has been recently identified, showing high efficacy in modulating the functions of the mutated protein in a variety of cell experiments. We here report a detailed biophysical characterization of the best aptamer in the series, named MS3, proved to adopt a stable, parallel G-quadruplex structure and show high nuclease resistance in serum. Confocal microscopy experiments on HeLa and SH-SY5Y cells, as models of non-neuronal and neuronal cells, respectively, showed a rapid, dose-dependent uptake of fluorescein-labelled MS3, demonstrating its effective internalization, even in the absence of transfecting agents, with no general cytotoxicity. Then, using a well-established Drosophila melanogaster model for Huntington's disease, which expresses the mutated form of human huntingtin, a significant improvement in the motor neuronal function in flies fed with MS3 was observed, proving the in vivo efficacy of this aptamer.


Assuntos
Doença de Huntington , Animais , Modelos Animais de Doenças , Drosophila melanogaster/genética , Drosophila melanogaster/metabolismo , Proteína Huntingtina/genética , Proteína Huntingtina/metabolismo , Doença de Huntington/genética , Doença de Huntington/metabolismo , Proteínas do Tecido Nervoso/metabolismo , Proteínas Nucleares/metabolismo
18.
Int J Mol Sci ; 23(20)2022 Oct 17.
Artigo em Inglês | MEDLINE | ID: mdl-36293267

RESUMO

Two analogues of the MS3 aptamer, which was previously shown to have an exquisite capability to selectively bind and modulate the activity of mutant huntingtin (mHTT), have been here designed and evaluated in their physicochemical and biological properties. Featured by a distinctive propensity to form complex G-quadruplex structures, including large multimeric aggregates, the original 36-mer MS3 has been truncated to give a 33-mer (here named MS3-33) and a 17-mer (here named MS3-17). A combined use of different techniques (UV, CD, DSC, gel electrophoresis) allowed a detailed physicochemical characterization of these novel G-quadruplex-forming aptamers, tested in vitro on SH-SY5Y cells and in vivo on a Drosophila Huntington's disease model, in which these shorter MS3-derived oligonucleotides proved to have improved bioactivity in comparison with the parent aptamer.


Assuntos
Aptâmeros de Nucleotídeos , Quadruplex G , Doença de Huntington , Neuroblastoma , Humanos , Aptâmeros de Nucleotídeos/farmacologia , Aptâmeros de Nucleotídeos/química , Proteína Huntingtina/genética
19.
Molecules ; 27(10)2022 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-35630629

RESUMO

Tree nuts are rich in polar (phenolic compounds) and non-polar (tocols) antioxidants, with recognized effects in the prevention of diseases such as cancer. These biomolecules possess antiproliferative activity on cancer cells; however, the combined effect of both types of compounds has been scarcely studied, and this approach could give valuable information on the real anticancer potential of tree nuts. In the present study, the antiproliferative activity of pure tocols and phenolic compounds, tocol- and phenolic-rich extracts (TRE and PRE, respectively) from tree nuts and the extracts combinations, was evaluated in four cancer (HeLa, MCF7, PC3, A549) and one control (ARPE) cell lines. The most sensible cell lines were HeLa and MCF7. TRE and PRE from nuts were chemically characterized; γ and δ tocopherols, total tocols, total tocopherols and total phenolic compounds were negatively correlated with cell viability in MCF7 cells. In HeLa cells, only δ and total tocopherols were negatively correlated with cell viability. TRE and PRE had a low effect in reducing cell viability of the cancer cell lines, the most effective extracts were those of emory oak acorn (EOA), pecan nut (PEC) and walnut (WAL), and these were further studied for their pharmacological interactions, using the combination index and the isobologram methods. Combinations of both extracts showed a synergistic and strongly synergistic behavior in the three nuts (EOA, PEC and WAL), with combination indexes between 0.12 and 0.55. These results highlight the need to understand the interactions among components found in complex natural extracts or food products in order to fully understand their bioactivities.


Assuntos
Neoplasias , Nozes , Células HeLa , Humanos , Nozes/química , Fenóis/análise , Fenóis/farmacologia , Extratos Vegetais/análise , Extratos Vegetais/farmacologia , Tocoferóis/análise
20.
J Clin Psychol Med Settings ; 29(4): 798-807, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-35064863

RESUMO

The current study aimed at exploring the relationship between objective disability, illness perceptions, resilience, fear of COVID-19, and psychological distress (i.e., anxiety, depression, and stress) in people with multiple sclerosis (pwMS) during the second wave of the COVID-19 outbreak. A group of 122 pwMS recruited in an Italian university hospital took part in this cross-sectional monocentric study. Hierarchical multiple linear regression analyses were performed to assess the strength of the hypothesized associations. Results indicated that, differently from cognitive impairment, motor disability was positively associated with anxiety. However, accounting for subjective illness perception, such association was no longer significant. Moreover, accounting for both protective and risk factors in the models, even illness perception was no longer significant, highlighting the central role of resilience and fear of COVID-19 in explaining the negative emotional outcomes. Implications for clinical interventions and psychoeducational trainings are discussed.


Assuntos
COVID-19 , Pessoas com Deficiência , Transtornos Motores , Esclerose Múltipla , Humanos , Saúde Mental , SARS-CoV-2 , Esclerose Múltipla/complicações , Esclerose Múltipla/epidemiologia , Estudos Transversais , Transtornos Motores/epidemiologia , Medo/psicologia , Surtos de Doenças , Ansiedade/epidemiologia , Ansiedade/psicologia , Depressão/epidemiologia , Depressão/psicologia
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