Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 74
Filtrar
Mais filtros

País/Região como assunto
Intervalo de ano de publicação
1.
J Neurochem ; 168(3): 238-250, 2024 03.
Artigo em Inglês | MEDLINE | ID: mdl-38332572

RESUMO

Deciphering the molecular pathways associated with N-methyl-D-aspartate receptor (NMDAr) hypofunction and its interaction with antipsychotics is necessary to advance our understanding of the basis of schizophrenia, as well as our capacity to treat this disease. In this regard, the development of human brain-derived models that are amenable to studying the neurobiology of schizophrenia may contribute to filling the gaps left by the widely employed animal models. Here, we assessed the proteomic changes induced by the NMDA glutamate receptor antagonist MK-801 on human brain slice cultures obtained from adult donors submitted to respective neurosurgery. Initially, we demonstrated that MK-801 diminishes NMDA glutamate receptor signaling in human brain slices in culture. Next, using mass-spectrometry-based proteomics and systems biology in silico analyses, we found that MK-801 led to alterations in proteins related to several pathways previously associated with schizophrenia pathophysiology, including ephrin, opioid, melatonin, sirtuin signaling, interleukin 8, endocannabinoid, and synaptic vesicle cycle. We also evaluated the impact of both typical and atypical antipsychotics on MK-801-induced proteome changes. Interestingly, the atypical antipsychotic clozapine showed a more significant capacity to counteract the protein alterations induced by NMDAr hypofunction than haloperidol. Finally, using our dataset, we identified potential modulators of the MK-801-induced proteome changes, which may be considered promising targets to treat NMDAr hypofunction in schizophrenia. This dataset is publicly available and may be helpful in further studies aimed at evaluating the effects of MK-801 and antipsychotics in the human brain.


Assuntos
Antipsicóticos , Clozapina , Animais , Humanos , Clozapina/farmacologia , Haloperidol/farmacologia , Antagonistas de Aminoácidos Excitatórios/farmacologia , Maleato de Dizocilpina/farmacologia , Proteoma/metabolismo , N-Metilaspartato , Ácido Glutâmico/metabolismo , Receptores de N-Metil-D-Aspartato/metabolismo , Proteômica , Antipsicóticos/farmacologia , Encéfalo/metabolismo
2.
Acta Neuropsychiatr ; : 1-7, 2024 Mar 26.
Artigo em Inglês | MEDLINE | ID: mdl-38528655

RESUMO

BACKGROUND: Cannabidiol (CBD) is one of the main cannabinoids present in Cannabis sativa female flowers. Previous investigation has already provided insights into the CBD molecular mechanism; however, there is no transcriptome data for CBD effects on hippocampal subfields. Here, we investigate transcriptomic changes in dorsal and ventral CA1 of adult mice hippocampus after 100 mg/kg of CBD administration (i.p.) for one or seven consecutive days. METHODS: C57BL/6JUnib mice were treated with either vehicle or CBD for 1 or 7 days. The collected brains were sectioned, and the hippocampal sub-regions were laser microdissected for RNA-Seq analysis. RESULTS: The transcriptome analysis following 7 days of CBD administration indicates the differential expression of 1559 genes in dCA1 and 2924 genes in vCA1. Furthermore, GO/KEGG analysis identified 88 significantly enriched biological process and 26 significantly enriched pathways for dCBD7, whereas vCBD7 revealed 128 enriched BPs and 24 pathways. CONCLUSION: This dataset indicates a widespread decrease of electron transport chain and ribosome biogenesis transcripts in CA1, while chromatin modifications and synapse organization transcripts were increased following CBD administration for 7 days.

3.
Med Microbiol Immunol ; 211(5-6): 219-235, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35857104

RESUMO

Microcephalic children due congenital Zika virus syndrome (CZS) present neurological symptoms already well described. However, several other alterations can also be observed. Here, we aimed to evaluate the immune system of microcephaly CZS children. We showed that these patients have enlarged thymus, spleen and cervical lymph nodes, analysed by ultrasound and compared to the reference values for healthy children. In the periphery, they have an increase in eosinophil count and morphological alterations as hypersegmented neutrophils and atypical lymphocytes, even in the absence of urinary tract infections, parasitological infections or other current symptomatic infections. Microcephalic children due CZS also have high levels of IFN-γ, IL-2, IL-4, IL-5 and type I IFNs, compared to healthy controls. In addition, this population showed a deficient cellular immune memory as demonstrated by the low reactivity to the tuberculin skin test even though they had been vaccinated with BCG less than 2 years before the challenge with the PPD. Together, our data demonstrate for the first time that CZS can cause alterations in primary and secondary lymphoid organs and also alters the morphology and functionality of the immune system cells, which broadens the spectrum of CZS symptoms. This knowledge may assist the development of specific therapeutic and more efficient vaccination schemes for this population of patients.


Assuntos
Microcefalia , Complicações Infecciosas na Gravidez , Infecção por Zika virus , Zika virus , Criança , Gravidez , Feminino , Humanos , Microcefalia/diagnóstico , Microcefalia/etiologia , Infecção por Zika virus/complicações , Infecção por Zika virus/diagnóstico , Brasil/epidemiologia
4.
Eur Arch Psychiatry Clin Neurosci ; 272(7): 1311-1323, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35622101

RESUMO

Cannabinoid signaling, mainly via CB1 and CB2 receptors, plays an essential role in oligodendrocyte health and functions. However, the specific molecular signals associated with the activation or blockade of CB1 and CB2 receptors in this glial cell have yet to be elucidated. Mass spectrometry-based shotgun proteomics and in silico biology tools were used to determine which signaling pathways and molecular mechanisms are triggered in a human oligodendrocytic cell line (MO3.13) by several pharmacological stimuli: the phytocannabinoid cannabidiol (CBD); CB1 and CB2 agonists ACEA, HU308, and WIN55, 212-2; CB1 and CB2 antagonists AM251 and AM630; and endocannabinoids anandamide (AEA) and 2-arachidonoylglycerol (2-AG). The modulation of cannabinoid signaling in MO3.13 was found to affect pathways linked to cell proliferation, migration, and differentiation of oligodendrocyte progenitor cells. Additionally, we found that carbohydrate and lipid metabolism, as well as mitochondrial function, were modulated by these compounds. Comparing the proteome changes and upstream regulators among treatments, the highest overlap was between the CB1 and CB2 antagonists, followed by overlaps between AEA and 2-AG. Our study opens new windows of opportunities, suggesting that cannabinoid signaling in oligodendrocytes might be relevant in the context of demyelinating and neurodegenerative diseases. Proteomics data are available at ProteomeXchange (PXD031923).


Assuntos
Canabidiol , Canabinoides , Canabidiol/farmacologia , Canabinoides/farmacologia , Carboidratos , Proliferação de Células/fisiologia , Endocanabinoides/metabolismo , Endocanabinoides/farmacologia , Humanos , Oligodendroglia/metabolismo , Proteoma , Transdução de Sinais
5.
Parasite Immunol ; 43(4): e12821, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33449376

RESUMO

INTRODUCTION: Chagas disease (CD) is a global health concern with approximately 12 000 deaths per year worldwide. In the chronic phase, about 30% of patients develop the cardiac clinical form, which presents symptoms associated with the presence of inflammatory cells in the cardiac tissue. Neutrophils are inflammatory cells able to modulate the chronic immune response against pathogens. These cells are capable of interacting with Trypanosoma cruzi, the aetiological agent of CD, and perform several effector functions, such as NET release. However, few studies have been carried out to investigate the role of these cells in the disease. AIMS: To investigate the release of NETs by neutrophils from CD patients by measuring the amount of DNA and elastase released. METHODS AND RESULTS: Measurement of DNA release by neutrophils from chronic CD patients presenting the indeterminate (IND group; n = 18) and cardiac (CARD group; n = 15) clinical forms and nonchagasic subjects (n = 18) stimulated with soluble antigen of T. cruzi was quantified using the Quant-iT™ PicoGreen® dsDNA assay kit. Patients from CARD group release less DNA (117.3 ± 21.85 ng/mL; *P = .0131) than neutrophils from control (177.7 ± 58.41 ng/mL). Elastase enzyme degranulation was measured using the substrate N-methoxysuccinyl-Ala-Ala-Pro-Val p-nitroanilide (SAAVNA). Absorbance values of elastase degranulation activity showed that only cells from healthy individuals presented a high release profile of elastase. Also, we found a negative correlation between DNA released concentration and risk of death (r = -.6574; *P = .0173); the lower the neutrophil DNA release from chagasic patients with cardiac event, the higher the risk of death. CONCLUSION: These preliminary data show that patients with the cardiac form of CD release less NETs than nonchagasic individuals, raising the possibility that lower release of NETs enhances risk of death in CD patients with cardiac events.


Assuntos
Cardiomiopatia Chagásica/metabolismo , Grânulos Citoplasmáticos/enzimologia , Histonas/metabolismo , Neutrófilos/metabolismo , Elastase Pancreática/metabolismo , Peroxidase/metabolismo , Antígenos de Protozoários/imunologia , Cardiomiopatia Chagásica/enzimologia , Cardiomiopatia Chagásica/genética , Feminino , Humanos , Masculino , Neutrófilos/enzimologia , Trypanosoma cruzi/imunologia
6.
Adv Exp Med Biol ; 1286: 251-264, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33725358

RESUMO

Psychiatric and neurodegenerative disorders such as schizophrenia (SCZ), Parkinson's disease (PD), and Alzheimer's disease (AD) continue to grow around the world with a high impact on health, social, and economic outcomes for the patient and society. Despite efforts, the etiology and pathophysiology of these disorders remain unclear. Omics technologies have contributed to the understanding of the molecular mechanisms that underlie these complex disorders and have suggested novel potential targets for treatment and diagnostics. Here, we have highlighted the unique and common pathways shared between SCZ, PD, and AD and highlight the main proteomic findings over the last 5 years using in vitro models, postmortem brain samples, and cerebrospinal fluid (CSF) or blood of patients. These studies have identified possible therapeutic targets and disease biomarkers. Further studies including target validation, the use of large sample sizes, and the integration of omics findings with bioinformatics tools are required to provide a better comprehension of pharmacological targets.


Assuntos
Doença de Alzheimer , Doenças Neurodegenerativas , Doença de Parkinson , Doença de Alzheimer/diagnóstico , Doença de Alzheimer/genética , Biomarcadores , Humanos , Doenças Neurodegenerativas/genética , Proteômica
7.
Psychol Health Med ; 25(2): 160-170, 2020 02.
Artigo em Inglês | MEDLINE | ID: mdl-31522538

RESUMO

Chronic pain is a cause of morbidity, interference with daily functioning, decreased health and quality of life. Purpose in life acts as a protective factor and mitigates these consequences. This cross-sectional study aimed to determine whether purpose in life contributed to psychological morbidity and quality of life in patients with chronic pain by controlling psychological variables related to health (pain severity and interference, pain perceptions, pain catastrophizing and coping). The sample included 103 patients diagnosed with chronic pain. Results showed that purpose in life independently contributed to psychological morbidity and to mental quality of life, but not to physical quality of life, after controlling for pain-related variables. Results showed the relevance of purpose in life to identify patients at risk of developing psychological morbidity and decreased quality of life, suggestting the need to intervene in chronic pain, specifically on purpose in life, to prevent psychological morbidity and promote quality of life, in this population.


Assuntos
Adaptação Psicológica , Catastrofização/psicologia , Dor Crônica/psicologia , Qualidade de Vida/psicologia , Adulto , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
8.
Adv Exp Med Biol ; 1118: 191-206, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30747424

RESUMO

Major depressive disorder is a multifactorial disease, with molecular mechanisms not fully understood. A breakthrough could be reached with a panel of diagnostic biomarkers, which could be helpful to stratify patients and guide physicians to a better therapeutic choice, reducing the time between diagnostic and remission. This review brings the most recent works in proteomic biomarkers and highlights several potential proteins that could compose a panel of biomarkers to diagnostic and response to medication. These proteins are related to immune, inflammatory, and coagulatory systems and may also be linked to energy metabolism, oxidative stress, cell communication, and oligodendrogenesis.


Assuntos
Biomarcadores , Transtorno Depressivo Maior/diagnóstico , Proteômica , Humanos
9.
Proteomics ; 18(18): e1700270, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30070429

RESUMO

Interest in the modulation of endocannabinoid signaling has increased since the discovery of receptors for compounds of Cannabis sativa. Endocannabinoids are crucial neuromodulators of many brain functions and changes in the ligands and their receptors have been associated with psychiatric disorders, such as schizophrenia. Genetic, neuroimaging, and behavioral studies have reinforced the role of endocannabinoids in the pathobiology of schizophrenia. However, molecular pathways and biological processes involved in cannabinoid effects are not totally understood. Additionally, the endocannabinoid signaling network with other non-cannabinoid targets, and the effects of phytocannabinoids increase the complexity to understand their role in schizophrenia and homeostasis conditions. Thus, proteomic studies can provide evidence about the involvement of cannabinoid receptors, as well as the metabolic and synthetic enzymes of the endocannabinoids in these disorders. Additionally, quantification of endocannabinoids in the blood serum or cerebrospinal fluid can be a useful approach to identify new biomarkers in schizophrenia, and lipidomic techniques can be used to quantify these compounds. Herein, the authors review proteomic and lipidomic studies that have been used for analysis of the endocannabinoid system in healthy and schizophrenia function. The findings may contribute to understand the involvement of endocannabinoids in the brain and in the neurobiological basis of schizophrenia.


Assuntos
Encéfalo/metabolismo , Endocanabinoides/metabolismo , Lipídeos/análise , Proteômica/métodos , Receptores de Canabinoides/metabolismo , Esquizofrenia/diagnóstico , Animais , Endocanabinoides/análise , Humanos , Esquizofrenia/metabolismo , Transdução de Sinais
10.
Parasite Immunol ; 40(12): e12593, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30276823

RESUMO

Chagas disease (CD) is a public health problem in Latin America. The acute phase presents nonspecific symptoms and most patients recover from acute parasitemia and undergo a prolonged asymptomatic phase. Several years later, about 30% of infected individuals develop chronic cardiopathy with progressive cardiomegaly, arrhythmia, thromboembolic events and heart failure. These symptoms suggest a persistent association with the presence of inflammatory infiltrate and tissue, and cellular destruction in the heart muscle. Nevertheless, few research studies have attempted to understand the role of inflammatory cells, such as neutrophils, in establishing the pathology and progression of CD. Only recently have some studies been performed with this intention. Despite this effort, the role of neutrophils in CD is still considered controversial. This review discusses the morphological and functional characteristics of neutrophils that describes their participation in the establishment and progression of Trypanosoma cruzi infection, through the development of its effector functions, such as release of lithic components, production of oxidative agents and release of inflammatory mediators capable of modulating the host immune response.


Assuntos
Doença de Chagas/patologia , Neutrófilos/imunologia , Trypanosoma cruzi/imunologia , Animais , Doença de Chagas/imunologia , Doença de Chagas/parasitologia , Progressão da Doença , Humanos , Neutrófilos/patologia , Trypanosoma cruzi/genética , Trypanosoma cruzi/fisiologia
11.
Eur Arch Psychiatry Clin Neurosci ; 268(7): 727-737, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29392440

RESUMO

Clinical and neurobiological findings have reported the involvement of endocannabinoid signaling in the pathophysiology of schizophrenia. This system modulates dopaminergic and glutamatergic neurotransmission that is associated with positive, negative, and cognitive symptoms of schizophrenia. Despite neurotransmitter impairments, increasing evidence points to a role of glial cells in schizophrenia pathobiology. Glial cells encompass three main groups: oligodendrocytes, microglia, and astrocytes. These cells promote several neurobiological functions, such as myelination of axons, metabolic and structural support, and immune response in the central nervous system. Impairments in glial cells lead to disruptions in communication and in the homeostasis of neurons that play role in pathobiology of disorders such as schizophrenia. Therefore, data suggest that glial cells may be a potential pharmacological tool to treat schizophrenia and other brain disorders. In this regard, glial cells express cannabinoid receptors and synthesize endocannabinoids, and cannabinoid drugs affect some functions of these cells that can be implicated in schizophrenia pathobiology. Thus, the aim of this review is to provide data about the glial changes observed in schizophrenia, and how cannabinoids could modulate these alterations.


Assuntos
Canabinoides/farmacologia , Endocanabinoides/metabolismo , Neuroglia/imunologia , Neuroglia/metabolismo , Receptores de Canabinoides/metabolismo , Esquizofrenia/imunologia , Esquizofrenia/metabolismo , Animais , Humanos
12.
Molecules ; 22(11)2017 Nov 10.
Artigo em Inglês | MEDLINE | ID: mdl-29125561

RESUMO

Dimethylsulfoxide (DMSO) is an amphipathic molecule composed of a polar domain characterized by the sulfinyl and two nonpolar methyl groups, for this reason it is able to solubilize polar and nonpolar substances and transpose hydrophobic barriers. DMSO is widely used to solubilize drugs of therapeutic applications and studies indicated that 10% v/v concentration did not modify culture viability when used to treat human peripheral blood mononuclear cells (PBMC). However, some DMSO concentrations could influence lymphocyte activation and present anti-inflammatory effects. Therefore, the objective of this study was to evaluate the effect of DMSO on lymphocyte activation parameters. Cell viability analysis, proliferation, and cytokine production were performed on PBMC from six healthy subjects by flow cytometry. The results indicated that 2.5% v/v DMSO concentrations did not modify lymphocytes viability. DMSO at 1% and 2% v/v concentrations reduced the relative proliferation index of lymphocytes and at 5% and 10% v/v concentrations reduced the percentage of total lymphocytes, cluster of differentiation 4⁺ (CD4⁺) T lymphocytes and CD8⁺ T lymphocytes interferon-γ (IFN-γ), tumor necrosis factor-α (TNF-α) and interleukin-2 (IL-2) producers. Thus, it was concluded that DMSO has an in vitro anti-inflammatory effect by reducing lymphocyte activation demonstrated with proliferation reduction and the decrease of cytokine production.


Assuntos
Dimetil Sulfóxido/farmacologia , Interferon gama/biossíntese , Interleucina-2/biossíntese , Linfócitos/citologia , Linfócitos/metabolismo , Fator de Necrose Tumoral alfa/biossíntese , Morte Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Células Cultivadas , Hemólise/efeitos dos fármacos , Humanos , Linfócitos/efeitos dos fármacos
13.
Radiol Case Rep ; 19(8): 3529-3532, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38881623

RESUMO

Syphilis is a chronic infectious disease, which dates back to the XV century and is caused by the spirochete treponema pallidum, capable of invading the central nervous system in any of its stages- Its incidence has increased in parallel to the HIV/AIDS pandemic, and the synergism between both pathologies is such. that it has become a public health problem in recent years. Here we present the case of a 31-year-old female patient, who consulted for headache associated with decreased visual acuity and provided an unenhanced head CT showing hypodense lesions in both thalamic regions, serological tests for syphilis were reactive and those for HIV were not reactive. The brain MRI with spectroscopy was reported in favor of cerebral toxoplasmosis, which was later ruled out with a study of cerebrospinal fluid. Management with penicillin G sodium IV for 6 weeks was indicated, achieving complete imaging resolution of her lesions.

14.
JBRA Assist Reprod ; 28(1): 90-95, 2024 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-38091259

RESUMO

The new coronavirus pandemic resulted in millions of deaths in Brazil and around the world, and presented substantial challenges to society. The shortand long-term clinical manifestations tied to COVID-19 are still poorly understood, and may involve several organs and systems, including the male genital tract, which may lead to impaired fertility. The present study aimed to analyze, through an integrative literature review of articles available in databases, the effects of COVID-19 on parameters related to human semen quality. The analyzed studies reported significant decreases in sperm motility and morphology related to COVID-19. Reductions in concentration and volume were also observed. Inflammatory response is one of the leading mechanisms that may potentially explain the observed changes, although others may also be involved. More studies are needed to better understand the effects, modes of action, as well as other aspects involved in this complex phenomenon.


Assuntos
COVID-19 , Infertilidade Masculina , Masculino , Humanos , Sêmen , Análise do Sêmen , COVID-19/complicações , Motilidade dos Espermatozoides , Infertilidade Masculina/etiologia , Espermatozoides
15.
Asian Pac J Cancer Prev ; 25(4): 1195-1203, 2024 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-38679978

RESUMO

BACKGROUND: Osteosarcoma is the most common primary malignant bone tumor, mainly affecting children, young adults, and the elderly. It is an aggressive cancer with a poor prognosis, exhibiting low survival rates even with standard treatment. Recently, circular RNA molecules capable of influencing gene expression through various functions, with their main role being acting as microRNA sponges and reducing their intracellular expression, have been identified. Recent studies have linked circular RNAs to osteosarcoma development and progression. Therefore, the present study aimed to investigate the alteration in circular RNA expression during osteosarcoma development and progression. METHODS: An integrative literature review was conducted from September 10th to November 12th, 2021, using the following databases: PubMed/MEDLINE, SCOPUS, Web of Science, OVID, and EMBASE. 129 full articles were included in the review. The obtained data were organized using a standardized data collection instrument, which included the following information: altered expression profile of circular RNAs, associated cancer hallmarks, clinical-pathological relationships of circular RNAs, and perspectives on the studied circular RNAs. RESULTS: A total of 94 distinct circular RNAs were identified, predominantly showing an increased expression pattern. Approximately 91% of the studies that aimed to identify the mechanisms of action of circular RNAs highlighted the function of circular RNAs as microRNA sponges. The most associated cancer hallmarks with the identified circular RNAs were proliferative signaling induction, invasion and metastasis, and resistance to cell death. The altered expression of these circular RNAs generally correlated with a worse prognosis for patients, as evidenced by clinical features such as shorter survival, advanced Enneking and/or TNM stage, higher incidence of metastasis, larger tumor size, and increased chemoresistance. CONSLUSION: These findings indicate the significance of circular RNA molecules in osteosarcoma carcinogenesis, suggesting their potential as new prognostic and/or diagnostic biomarkers, as well as alternative therapeutic targets in the fight against osteosarcoma.


Assuntos
Neoplasias Ósseas , Progressão da Doença , Osteossarcoma , RNA Circular , Humanos , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Neoplasias Ósseas/genética , Neoplasias Ósseas/patologia , Neoplasias Ósseas/metabolismo , Regulação Neoplásica da Expressão Gênica , MicroRNAs , Osteossarcoma/genética , Osteossarcoma/patologia , Osteossarcoma/metabolismo , Osteossarcoma/mortalidade , Prognóstico , RNA Circular/genética
16.
Biomed Rep ; 20(5): 81, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38628629

RESUMO

The etiopathogenesis of type 1 diabetes mellitus (T1DM) is a complex multifactorial process that involves an intricate network of genetic, epigenetic, immunological, and environmental factors. Despite the advances in recent years, some aspects of the mechanisms involved in triggering the disease are still unclear. Infections with certain viruses have been suggested as possible environmental triggers for the autoimmune process that leads to selective and progressive destruction of pancreatic ß-cells and insufficiency of insulin production, which is its hallmark. In this review, advances in knowledge and evidence that suggest the participation of certain viruses in the mechanisms of disease initiation and progression are described. It has been accepted that environmental factors, including viruses, can initiate and possibly sustain, accelerate, or slow down the autoimmune process and consequently damage insulin-producing pancreatic ß-cells. Although the role of these agents, especially human enteroviruses, has been exhaustively studied as the most likely triggers of the activation of autoimmunity that destroys pancreatic islets and leads to T1DM, certain doubts remain. Clinical epidemiological and experimental studies in humans and animals provide consistent and increasing evidence that persistent viral infections, especially with human enteroviruses and rotavirus infections, are associated with an increased risk of the disease in individuals genetically predisposed to autoimmunity.

17.
bioRxiv ; 2024 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-38260577

RESUMO

Schizophrenia (SCZ) is a genetically heterogenous psychiatric disorder of highly polygenic nature. Correlative evidence from genetic studies indicate that the aggregated effects of distinct genetic risk factor combinations found in each patient converge onto common molecular mechanisms. To prove this on a functional level, we employed a reductionistic cellular model system for polygenic risk by differentiating induced pluripotent stem cells (iPSCs) from 104 individuals with high polygenic risk load and controls into cortical glutamatergic neurons (iNs). Multi-omics profiling identified widespread differences in alternative polyadenylation (APA) in the 3' untranslated region of many synaptic transcripts between iNs from SCZ patients and healthy donors. On the cellular level, 3'APA was associated with a reduction in synaptic density of iNs. Importantly, differential APA was largely conserved between postmortem human prefrontal cortex from SCZ patients and healthy donors, and strongly enriched for transcripts related to synapse biology. 3'APA was highly correlated with SCZ polygenic risk and affected genes were significantly enriched for SCZ associated common genetic variation. Integrative functional genomic analysis identified the RNA binding protein and SCZ GWAS risk gene PTBP2 as a critical trans-acting factor mediating 3'APA of synaptic genes in SCZ subjects. Functional characterization of PTBP2 in iNs confirmed its key role in 3'APA of synaptic transcripts and regulation of synapse density. Jointly, our findings show that the aggregated effects of polygenic risk converge on 3'APA as one common molecular mechanism that underlies synaptic impairments in SCZ.

18.
J Pediatr Urol ; 20(2): 220.e1-220.e9, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38097421

RESUMO

INTRODUCTION: Neurogenic bladder was first confirmed as a urological sequela of Congenital Zika Syndrome (CZS) in 2018. Further clinical-epidemiological evidence also confirmed neurogenic bowel dysfunction and cryptorchidism. To strengthen the care for these children, the Congenital Zika Virus Bladder and Bowel Sequelae Network (RASZ in Brazilian) was created, including six integrated centers in Brazil. This article represents the initial outcome of the efforts by RASZ. OBJECTIVE: To evaluate the prevalence of bladder and bowel dysfunction, cryptorchidism and other urological sequelae related to CZS in cohorts attended in six Brazilian states. STUDY DESIGN: Observational, prospective, multicenter study including children with CZS assisted in one of six RASZ collaborative centers between June 2016 and February 2023. Data were collected from patient's first assessment using the same protocols for urological and bowel evaluation. Categorical variables were analyzed by frequency of occurrence and numerical variables by mean, median, and standard deviation. The study was approved by the Research Ethics Committees of each center, all parents/caregivers provided written informed consent. RESULTS: The study included 414 children aged 2 months to 7 years (mean 2.77 years, SD 1.73), 227 (54.8 %) were male and 140 (33,8 %) referred urological and bowel symptoms on arrival. Prevalence of both urological and bowel sequelae was 66.7 %, 51 % of children aged 4 years and older had urinary incontinence (UI). UTI was confirmed in 23.4 % (two presented toxemia) and among males, 18.1 % had cryptorchidism. Renal ultrasonography, performed in 186 children, was abnormal in 25 (13.4 %), 7 had hydronephrosis. Among the 287 children who performed urodynamics, 283 (98.6 %) were altered: 232 had a lower bladder capacity, 144 a maximum bladder pressure of ≥40 cm H2O, and 127 did not satisfactorily empty their bladder. DISCUSSION: A higher prevalence of NLUTD, neurogenic bowel and cryptorchidism was confirmed in children with CZS. Early diagnosis and appropriate treatment, including a multidisciplinary approach, may reduce the risk of UTIs, UI and kidney damage. A limitation of the study was the inability of children to complete the protocol, specifically urodynamic evaluation, and ultrasonography. In both exams, the percentage of abnormal cases was higher than that expected in the normal population. CONCLUSION: A 66,7 % prevalence of combined urological sequelae and bladder-bowel dysfunction related to CZS was confirmed in patients evaluated in six Brazilian cohorts. The most frequent changes were related to NLUTD, neurogenic bowel, and cryptorchidism. Prevalence may be underestimated due to access restrictions to diagnostic tests.


Assuntos
Criptorquidismo , Enteropatias , Intestino Neurogênico , Bexiga Urinaria Neurogênica , Incontinência Urinária , Infecções Urinárias , Infecção por Zika virus , Zika virus , Criança , Humanos , Masculino , Feminino , Bexiga Urinária/diagnóstico por imagem , Infecção por Zika virus/complicações , Infecção por Zika virus/epidemiologia , Infecção por Zika virus/congênito , Estudos Prospectivos , Intestino Neurogênico/complicações , Criptorquidismo/complicações , Prevalência , Bexiga Urinaria Neurogênica/diagnóstico , Bexiga Urinaria Neurogênica/epidemiologia , Bexiga Urinaria Neurogênica/etiologia , Infecções Urinárias/complicações , Urodinâmica
19.
Glob Pediatr Health ; 10: 2333794X231201261, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37841637

RESUMO

Objective. To track the BP (blood pressure) trajectory of healthy infants during the first year of life of healthy infants born in Northeast Brazil. Methods. In this cohort study, BP was assessed by oscillometry at the first 24 hours of life and 12 months of age. Results. Systolic blood pressure (SBP) and diastolic blood pressure (DBP) increased with age (P < .001) and were not influenced by gender (SBP: P = .178 and DBP: P = .623) or type of delivery (SBP: P = .827 and DBP: P = .106), when compared between the first 24 hours of life and 12 months of age. Conclusion. The data from the present study increased knowledge about the trajectory of BP during the first year of life. The increase in BP between the first month and the first year of life was not influenced by gender or type of delivery.

20.
Artigo em Inglês | MEDLINE | ID: mdl-37772695

RESUMO

Human immunodeficiency virus (HIV) infection is still an important public health problem, which justifies the research of new therapies to combat it. Recent studies show that Extracellular Traps (ETs) are cellular mechanisms useful in the capture and destruction of some viruses, such as the HIV. Here, we show that neutrophils from peripheral blood, genital tissues, and placenta are activated when exposed to human immunodeficiency virus type 1 (HIV-1) and release Neutrophil Extracellular Traps (NETs). The NETs can capture, neutralize, and inactivate the virus and, also, protect other target cells from HIV infection, as long as the DNA and other constituents of the NETs remain intact. Further, the review indicates that the immunoprotective role of NETs in the context of HIV-1 infection is a promising finding for the development of new antiviral therapies. It is necessary, however, the development of studies that evaluate the tissue injury that NETs can cause and the biological relationships with other cells to improve them as therapeutic targets.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA