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1.
Chem Biodivers ; 17(2): e1900473, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31961474

RESUMO

Veratrum plant contains a family of compounds called steroidal alkaloids which have been previously reported to cause DNA damage and blood pressure decrease in vivo. In this study, the antihypertensive effects and DNA damage in brain cells of 12 steroidal alkaloids separated from Veratrum plant were all evaluated to develop a relationship among chemical structure, antihypertensive activity and neurotoxicity by utilization of chemical principal component analysis (PCA) and hierarchical cluster analysis (HCA). Twelve steroidal alkaloids markedly reduced high blood pressure of hypertensive mice and also similarly induced varying degrees of DNA single-strand breaks in mouse cerebellum and cerebral cortex after oral administration. On the basis of the PCA and HCA results, it was suggested that the 3-carboxylic esters and benzene group play a core role in the DNA damage of brain cells, while more hydroxy groups in the A-ring and B-ring structure of jervine-type alkaloid led to stronger antihypertensive activity. The primary structure, activity and neurotoxicity relationship were discussed briefly.


Assuntos
Anti-Hipertensivos/química , Alcaloides de Veratrum/química , Veratrum/química , Administração Oral , Animais , Anti-Hipertensivos/farmacologia , Pressão Sanguínea/efeitos dos fármacos , Córtex Cerebral/efeitos dos fármacos , Córtex Cerebral/metabolismo , Análise por Conglomerados , Dano ao DNA/efeitos dos fármacos , Camundongos , Extratos Vegetais/química , Análise de Componente Principal , Relação Estrutura-Atividade , Veratrum/metabolismo , Alcaloides de Veratrum/farmacologia
2.
ACS Chem Neurosci ; 9(7): 1616-1624, 2018 07 18.
Artigo em Inglês | MEDLINE | ID: mdl-29708326

RESUMO

Ethanol is a principle ingredient of alcoholic beverages with potential neurotoxicity and genotoxicity, and the ethanol-associated oxidative DNA damage in the central nervous system is well documented. Natural source compounds may offer new options to protect the brain against ethanol-induced genotoxicity. Veratrum maackii Regel is a toxic rangeland plant linked to teratogenicity which is also used in traditional Chinese medicine as "Lilu" and is reported to contain a family of compounds called stilbenes that can have positive biological activity. In this study, nine stilbenes were isolated from the aerial parts of V. maackii Regel, and their structures were identified as cis-mulberroside A (1), resveratrol-4,3'- O-ß-d-diglucopyranoside (2), mulberroside A (3), gentifolin K (4), resveratrol-3,5- O-ß-d-diglucopyranoside (5), oxyresveratrol- 4'- O-ß-d-glucopyranoside (6), oxyresveratrol-3- O-ß-d-glucopyranoside (7), oxyresveratrol (8), and resveratrol (9) using ESI-MS and NMR techniques. The total concentration of extracted compounds 2-9 was 2.04 mg/g, suggesting that V. maackii Regel is a novel viable source of these compounds. In an in vivo comet assay, compounds 1-9 were observed to decrease DNA damage in mouse cerebellum and cerebral cortex caused by acute ethanol administration. Histological observation also revealed decreased brain injury in mice administered with compounds 1-9 after acute ethanol administration. The protective effects of compound 6 were associated with increasing T-SOD and GSH-PX activities and a decrease in NO and MDA concentrations. These findings suggest that these compounds are potent inhibitors of ethanol-induced brain injury possibly via the inhibition of oxidative stress and may be valuable leads for future therapeutic development.


Assuntos
Depressores do Sistema Nervoso Central/efeitos adversos , Dano ao DNA/efeitos dos fármacos , Etanol/efeitos adversos , Substâncias Protetoras/farmacologia , Estilbenos/farmacologia , Veratrum , Transtornos Relacionados ao Uso de Álcool/tratamento farmacológico , Transtornos Relacionados ao Uso de Álcool/metabolismo , Transtornos Relacionados ao Uso de Álcool/patologia , Animais , Cerebelo/efeitos dos fármacos , Cerebelo/metabolismo , Cerebelo/patologia , Córtex Cerebral/efeitos dos fármacos , Córtex Cerebral/metabolismo , Córtex Cerebral/patologia , Masculino , Camundongos , Estrutura Molecular , Neurônios/efeitos dos fármacos , Neurônios/metabolismo , Neurônios/patologia , Fototerapia , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação , Extratos Vegetais/farmacologia , Substâncias Protetoras/química , Substâncias Protetoras/isolamento & purificação , Distribuição Aleatória , Estilbenos/química , Estilbenos/isolamento & purificação
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