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1.
Fitoterapia ; 169: 105615, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37454778

RESUMO

Fifteen unreported prenylated C6-C3 derivatives (1-15) were isolated from the stems and branches of Illicium ternstroemioides A. C. Smith, including one bis-prenylated C6-C3 derivative (1), three prenylated C6-C3 derivative-shikimic acid ester hybrids (2-4) and 11 prenylated C6-C3 monomers (5-15). The structures of compounds 1-15 were elucidated by spectroscopic analysis (UV, IR, 1D and 2D NMR, and HRESIMS). The absolute configurations of the compounds were determined using electronic circular dichroism (ECD), induced circular dichroism (ICD), and the modified Mosher's method. Among the isolates, compounds 11, 12, and 15 exhibited significant anti-inflammatory activities by inhibiting the nitric oxide with IC50 values ranging from 1.89 to 24.83 µM in lipopolysaccharide-stimulated murine RAW 264.7 macrophages and murine BV2 microglial cells; compounds 2, 3, and 7 exhibited antiviral activitives against Coxsackievirus B3 with an IC50 value of 33.3, 25.9, and 27.8 µM, respectively.


Assuntos
Illicium , Camundongos , Animais , Illicium/química , Estrutura Molecular , Anti-Inflamatórios , Macrófagos , Dicroísmo Circular
2.
Artigo em Inglês | MEDLINE | ID: mdl-34281118

RESUMO

Little is known about family medicine academic workforce in Taiwan, and basic data on this may aid healthcare decision-makers and contribute to the limited literature. We analyzed data from 13 medical schools in Taiwan collected by the Taiwan Association of Family Medicine from June to September 2019, regarding characteristics of medical schools, and total staff, gender, age, degree, working title (adjunct/full-time), academic level, and subspecialty of each current family medicine faculty member. Total 13 medical schools in Taiwan with an undergraduate education program in family medicine, but only nine of the 13 medical schools had family medicine departments, while four still do not. A total of 116 family medicine faculty members ranging from 33-69 years. Of these, most were male (n = 85, 73.3%), with a mean age of 43.3 years. Most faculty members possessed a master's degree (n = 49, 42.2%), were academic lecturers (n = 49, 42.2%), were located in northern Taiwan (n = 79, 68.1%), and subspecialize in gerontology and geriatrics (n = 55, 47.4%) and hospice palliative care (n = 53, 45.7%). Additionally, most family medicine faculty in medical schools were adjunct faculty (n = 90, 77.6%), with only about one-fourth (n = 26, 22.4%) working full-time. Our study provides the most holistic census to date on academic family medicine faculty from all medical schools in Taiwan. The novel information can provide educational leaders, health policy managers, and decision-makers about the current developments of the family medicine departments in Taiwan's medical schools. The basic data will help formulate an effective medical school family medicine education plan and improve the establishment and development of the family medicine faculty workforce to help medical education and national health policy development in the future in Taiwan.


Assuntos
Medicina de Família e Comunidade , Faculdades de Medicina , Adulto , Docentes de Medicina , Humanos , Masculino , Taiwan , Estados Unidos , Recursos Humanos
3.
Bioorg Med Chem ; 19(18): 5596-604, 2011 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-21840724

RESUMO

A series of novel curcumin analogues were designed, synthesized, and evaluated as potential multifunctional agents for the treatment of AD. The in vitro studies showed that these compounds had better inhibitory properties against Aß aggregation than curcumin. Superior anti-oxidant properties (better than the reference compound Trolox) of these compounds were observed by the oxygen radical absorbance capacity (ORAC) method and a cell-based assay using DCFH-DA as a probe. In addition they were able to chelate metals such as iron and copper and decrease metal-induced Aß aggregation. The structure-activity relationships were discussed. The results suggested that our curcumin analogues could be selected as multifunctional agents for further investigation of AD treatment.


Assuntos
Doença de Alzheimer/tratamento farmacológico , Peptídeos beta-Amiloides/antagonistas & inibidores , Curcumina/síntese química , Curcumina/farmacologia , Desenho de Fármacos , Fragmentos de Peptídeos/antagonistas & inibidores , Doença de Alzheimer/metabolismo , Peptídeos beta-Amiloides/metabolismo , Antioxidantes/metabolismo , Linhagem Celular Tumoral , Quelantes/química , Quelantes/farmacologia , Curcumina/análogos & derivados , Curcumina/química , Relação Dose-Resposta a Droga , Humanos , Estrutura Molecular , Fragmentos de Peptídeos/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Estereoisomerismo , Relação Estrutura-Atividade
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