RESUMEN
The specific mechanisms by which acupuncture affects the central nervous system are unclear. In the International Standard Scalp Acupuncture system, acupuncture needles are applied at the middle line of the vertex, anterior parietal-temporal oblique line, and the posterior parietal-temporal oblique line. We conducted a single-arm prospective clinical trial in which seven healthy elderly volunteers (three men and four women; 50-70 years old) received International Standard Scalp Acupuncture at MS5 (the mid-sagittal line between Baihui (DU20) and Qianding (DU21)), the left MS6 (line joining Sishencong (EX-HN1) and Xuanli (GB6)), and the left MS7 (line joining DU20 and Qubin (GB7)). After acupuncture, resting-state functional magnetic resonance imaging demonstrated changes in the fractional amplitude of low frequency fluctuations and regional homogeneity in various areas, showing remarkable enhancement of regional homogeneity in the bilateral anterior cingulate, left medial frontal gyrus, supramarginal gyrus, right middle frontal gyrus, and inferior frontal gyrus. Functional connectivity based on a seed region at the right middle frontal gyrus (42, 51, 9) decreased at the bilateral medial superior frontal gyrus. Our data preliminarily indicates that the international standard scalp acupuncture in healthy elderly participants specifcally enhances the correlation between the brain regions involved in cognition and implementation of the brain network regulation system and the surrounding adjacent brain regions. The study was approved by the Ethics Committee of the China-Japan Union Hospital at Jilin University, China, on July 18, 2016 (approval No. 2016ks043).
RESUMEN
A new dihydroisocoumarins, 6-methoxy-8-hydroxy-3-(4-hydroxyphenyl)isochroman-1-one, named as hongkongenin (1), and seven known flavonoids were isolated from the methanol extract whole plant of Polygala hongkongensis Hemsl. Their structures were established on the basis of UV, IR, NMR, and MS spectral data. It is the first report of the occurrence of isocoumarins in Polygala, and the known compounds 2-8 were isolated from this plant for the first time. Flavonoids showed potent antioxidant activities in vitro against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals, hydroxyl radicals, and reductive activity to Fe3+.
Asunto(s)
Antioxidantes/aislamiento & purificación , Isocumarinas/aislamiento & purificación , Polygala/química , Antioxidantes/química , Compuestos de Bifenilo/química , Flavonoides/química , Flavonoides/aislamiento & purificación , Depuradores de Radicales Libres/química , Depuradores de Radicales Libres/aislamiento & purificación , Hidrazinas/química , Radical Hidroxilo/química , Concentración 50 Inhibidora , Hierro/química , Isocumarinas/química , Resonancia Magnética Nuclear Biomolecular , Rotación Óptica , Picratos , Componentes Aéreos de las Plantas/química , Plantas Medicinales/química , Espectrometría de Masa por Ionización de Electrospray , Espectrofotometría Ultravioleta , Espectroscopía Infrarroja por Transformada de FourierRESUMEN
OBJECTIVE: To investigate the chemical constituents of the rhizomes of Actaea asiatica in order to obtain a more comprehensive understanding of its effective components. METHOD: Compounds were separated by silica gel chromatography, RP-C18 chromatography and semi-preparative high performance liquid chromatography, and their structures were established by spectral analysis and chemical evidence. RESULT: Six compounds were isolated from the ethyl acetate extract. Their structures were identified as 25-O-acetylcimigenol (1), 12beta-hydroxycimigenol (2), 23-epi-26-deoxyactein (3), 27-deoxyacetylacteol (4), 26-deoxycimicifugenin (5) and beta-sitosterol (6). CONCLUSION: All these compounds mentioned above were isolated from the plant for the first time.