Rhus parviflora and its biflavonoid constituent, rhusflavone, induce sleep through the positive allosteric modulation of GABA(A)-benzodiazepine receptors

Journal of Ethnopharmacology
Sabina ShresthaNam-In Baek

Abstract

Rhus parviflora is referred as 'Tintidikah' in traditional medicinal system of south Asia (Ayurveda). It is used in treatment of Vāta vikāra, a condition related to neurological complications as well as cure for stomach disorders. Dried and powdered fruits of R. parviflora were extracted with 80% aqueous methanol (RPME). The concentrated extract was successively partitioned with distilled water (DW), ethyl acetate (EtOAc), and n-butanol (n-BuOH). All extracts, as well as isolated biflavonoids from R. parviflora, were evaluated for their affinity to the benzodiazepine binding site of GABA(A) receptor. The sedative-hypnotic effects of the fractions were evaluated by measuring sleep latency and sleep duration during pentobarbital-induced sleep in mice after oral administration of the extract fractions. Oral administration of RPME (125 mg/kg, 250 mg/kg, 500 mg/kg, and 1000 mg/kg) produced a dose-dependent decrease in sleep latency and an increase in sleep duration in mice treated with pentobarbital. The methanol extract produced a hypnotic effect that was fully blocked by ³H-Ro 15-1788 flumazenil (FLU). Further, among the solvent fractions, the ethyl acetate fraction exhibited significant activity. Among the isolated compounds, bif...Continue Reading

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Citations

Sep 26, 2013·BMC Complementary and Alternative Medicine·Manoj ModiSatish Gupta
Feb 6, 2015·Oxidative Medicine and Cellular Longevity·Tâmara Coimbra DinizJackson Roberto Guedes da Silva Almeida
Jun 23, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Serhat Sezai Çiçek
Apr 26, 2019·IUBMB Life·Muhammad Torequl IslamRazina Rouf
Feb 13, 2020·Natural Product Reports·Marjorie BruderDaniela B B Trivella
Sep 20, 2019·Drug Discoveries & Therapeutics·Xiaochun ZhangYuemao Shen
Jul 1, 2020·Evidence-based Complementary and Alternative Medicine : ECAM·Beauty E OmoruyiGraeme Bradley

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