Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 7 de 7
Filtrar
Mais filtros











Base de dados
Intervalo de ano de publicação
1.
Biochem Genet ; 2024 Sep 21.
Artigo em Inglês | MEDLINE | ID: mdl-39304639

RESUMO

The aim of this study was to explore the molecular mechanisms underlying cerebellar transcranial direct current stimulation (ctDCS) as a rehabilitation intervention for patients with ischemic stroke, focusing on the role of microRNAs (miRNAs). Whole-transcriptome sequencing was employed to obtain circulating expression profiles of miRNAs, long non-coding RNAs (lncRNAs), circular RNAs (circRNAs), and mRNAs in patients with ischemic stroke before and after 3-week ctDCS. miRanda software was used to predict the target genes of miRNAs, while Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were conducted to identify biological functions and signaling pathways. Subsequently, competing endogenous RNA (ceRNA) regulatory networks comprising circRNA-miRNA-mRNA and lncRNA-miRNA-mRNA interactions were constructed. Key miRNAs in blood samples were validated through quantitative RT-PCR. In total, 43 miRNAs, 807 lncRNAs, 1,111 circRNAs, and 201 mRNAs were differentially expressed after ctDCS compared with before ctDCS. Bioinformatics analyses revealed significant enrichment of target genes regulated by differentially expressed miRNAs across multiple biological pathways. CeRNA regulatory networks implied that several miRNAs were closely related to the ctDCS. Among them, hsa-miR-181a-5p, hsa-miR-224-5p, and hsa-miR-340-3p showed significantly downregulated expression levels as confirmed by qRT-PCR. This study conducted the first-ever assessment of miRNA expression patterns in patients with ischemic stroke undergoing ctDCS. The findings revealed that ctDCS induces alterations in miRNA levels, suggesting their potential utility as therapeutic markers.

2.
Bioorg Med Chem Lett ; 18(11): 3344-9, 2008 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-18442905

RESUMO

Optimization of a series of uracils bearing a 2-fluoro- or 2-chloro-3-methoxyphenyl group at the 5-position resulted in compounds such as 3d and 3f with subnanomolar binding affinity at the human GnRH receptor. While the 2-fluoro-3-methoxyphenyl compound 3a was characterized as a mixture of interchangeable atropisomers, the diastereoisomers of 2-chloro-3-methoxyphenyl analogs were separated. It was found that the aR-atropisomer was much more potent than the aS-isomer based on the X-ray crystal structure of 3h-II.


Assuntos
Receptores LHRH/antagonistas & inibidores , Uracila/análogos & derivados , Uracila/síntese química , Uracila/farmacologia , Cristalografia por Raios X , Humanos , Conformação Molecular , Estrutura Molecular , Estereoisomerismo , Relação Estrutura-Atividade , Uracila/química
3.
Bioorg Med Chem Lett ; 17(14): 3845-50, 2007 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-17521908

RESUMO

A novel series of 2-(4,5,6,7-tetrahydro-1H-pyrrolo[3,2-c]pyridin-3-yl)-ethylamine derivatives were designed and synthesized as GnRH receptor antagonists. SAR studies led to a series of highly active molecules against both the rat and human receptors. Furthermore, one potent compound, 17j, demonstrated dose-dependent LH suppression in castrated rats.


Assuntos
Piridinas/farmacologia , Receptores LHRH/antagonistas & inibidores , Animais , Células Cultivadas , Humanos , Piridinas/química , Ratos , Relação Estrutura-Atividade
5.
J Med Chem ; 49(13): 3753-6, 2006 Jun 29.
Artigo em Inglês | MEDLINE | ID: mdl-16789729

RESUMO

Melanin-concentrating hormone receptor antagonists containing thieno- and a benzopyridazinone cores were designed and tested as potential anorectic agents. These ligands showed high affinity for the receptor, potent functional activity in vitro, and good oral bioavailabilty in rats. The thiophene analogue exhibited low iv clearance, long half-life, and high brain penetration. In obese rats, the thienopyridazinone demonstrated a dose-dependent reduction in feeding and body weight with doses between 1 and 10 mg kg-1.


Assuntos
Depressores do Apetite/síntese química , Piridazinas/síntese química , Receptores de Somatostatina/antagonistas & inibidores , Tiofenos/síntese química , Animais , Depressores do Apetite/farmacocinética , Depressores do Apetite/farmacologia , Disponibilidade Biológica , Peso Corporal/efeitos dos fármacos , Encéfalo/metabolismo , Ingestão de Alimentos/efeitos dos fármacos , Meia-Vida , Masculino , Obesidade/tratamento farmacológico , Permeabilidade , Piridazinas/química , Piridazinas/farmacologia , Ratos , Ratos Sprague-Dawley , Estereoisomerismo , Relação Estrutura-Atividade , Tiofenos/farmacocinética , Tiofenos/farmacologia
6.
Bioorg Med Chem Lett ; 15(14): 3439-45, 2005 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-15950467

RESUMO

A novel series of bis-aminopyrrolidine ureas containing either a 4-biphenylcarboxmide or 5-phenyl-2-thiophenecarboxamide group have been identified as potent and functional antagonists of the melanin-concentrating hormone receptor-1. Syntheses and SAR are described, which led to the discovery of compounds with high binding affinity (Ki = 1 nM) for the receptor. Preliminary in vitro metabolic stability data are also reported for key compounds.


Assuntos
Amidas , Pirrolidinas , Receptores de Somatostatina/antagonistas & inibidores , Ureia , Amidas/síntese química , Amidas/farmacologia , Animais , Desenho de Fármacos , Conformação Molecular , Peso Molecular , Pirrolidinas/síntese química , Pirrolidinas/farmacologia , Ratos , Relação Estrutura-Atividade , Ureia/análogos & derivados , Ureia/síntese química , Ureia/farmacologia
7.
Bioorg Med Chem Lett ; 15(4): 999-1004, 2005 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-15686900

RESUMO

Ureas derived from two substituted 3-aminopyrrolidine subunits were prepared as constrained analogs of a linear lead compound and tested as antagonists of the MCH(1) receptor. The series was optimized for substitution and stereochemistry to generate a functional antagonist with a K(i) of 3.3 nM and IC(50) of 12 nM (GTPgammaS).


Assuntos
Receptores do Hormônio Hipofisário/antagonistas & inibidores , Ureia/química , Ureia/farmacologia , Relação Dose-Resposta a Droga , Desenho de Fármacos , Humanos , Pirrolidinas/química , Pirrolidinas/farmacologia , Estereoisomerismo , Relação Estrutura-Atividade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA