title: Herbal extract prevents bone loss in ovariectomized rats.
abstract: This research aims to test a new drug candidate based on a traditional medicinal herb, F1, an herbal extract obtained from Astragalus membranaceus and its main ingredient, 1-monolinolein that may have fewer side effects and less uterine hypertrophy. In vitro experiments, human osteoblast-like cell lines, MG-63 and Saos-2, were analyzed by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) and an alkaline phosphatase (ALP) assays. Mouse osteoclasts were induced through a calcium-deficient diet and inhibition effects were measured. In vivo experiments were done using ovariectomized (OVX) rats for 9 weeks. At necropsy, uterus weights were measured, trabecular bone area (TBA) of tibia and lumbar vertebra were measured bone histomorphology. In results, cell proliferation and ALP activity in Saos-2 by ether F1 or 1-monolinolein did not increased significantly compared to the control. The F1 inhibited osteoclast development (IC25 = 3.37 x 10(-5) mg/mL) less than 17beta-estradiol. The OVX rats administered F1 (2 mg/kg/day and 10 mg/kg/day) showed an increase in TBA of the tibia significantly (136.3 +/- 4.2% and 138.5 +/- 10.3% of control). In conclusions, the herbal extract, F1 inhibited tibia and lumbar bone loss and did not cause uterine hypertrophy. However, 1-monolinolein, the main ingredient of the herbal extract, did not inhibit bone loss.
authors.affiliation: Drug Research and Development Team, Korea Institute of Oriental Medicine, 129-11 Chungdam-dong, Kangnam-ku, Seoul 135-100, Korea. cskim@kiom.re.kr
authors.forename: Chungsook
authors.initials: C
authors.lastname: Kim
authors.forename: Hyekyung
authors.initials: H
authors.lastname: Ha
authors.forename: Je-Hyun
authors.initials: JH
authors.lastname: Lee
authors.forename: Jin-Sook
authors.initials: JS
authors.lastname: Kim
authors.forename: Kyeyong
authors.initials: K
authors.lastname: Song
authors.forename: Sie Won
authors.initials: SW
authors.lastname: Park
mesh_terms: D000818:Animals; D027885:Astragalus propinquus; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D002460:Cell Line; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D051379:Mice; D008813:Mice, Inbred ICR; D010010:Osteoclasts / Q000166:cytology / Q000187:drug effects / Q000502:physiology; D015663:Osteoporosis, Postmenopausal / Q000473:pathology / Q000517:prevention & control*; D010052:Ovariectomy / Q000706:statistics & numerical data; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use; D028321:Plant Preparations / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D018517:Plant Roots; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D010936:Plant Extracts; D028321:Plant Preparations