A Japanese herbal medicine, Chujo-to, has a beneficial effect on osteoporosis in rats.
The inhibitory effects of a Japanese herbal medicine, Chujo-to, on the progress of bone loss induced by ovariectomy in rats were investigated. Ovariectomized rats were administered with Chujo-to during weeks 7-14 after ovariectomy. At 14 weeks, the bone mineral density of the tibia from ovariectomized (OVX) rats had decreased by 27% compared with those in the sham-operated rats, and by a 18%-21% and 16% decrease after the administration of Chujo-to and 17 beta-oestradiol, respectively. The surface of a trabecular bone of the tibia in ovariectomized rats had a porous and fibrous appearance, while that of the same bone in sham-operated rats was composed of fine particles. After the administration of Chujo-to or 17 beta-oestradiol, the surface of trabecular bone maintained the porous and fibrous appearance. The uterine weight was not restored by Chujo-to but by 17 beta-oestradiol. These results suggest that Chujo-to has an efficacy on the osteoporosis of rats similar to 17 beta-oestradiol, but with a different mechanism.
Hidaka
S
S
Department of Dental Hygiene, Fukuoka College of Health Sciences, Japan.
Okamoto
Y
Y
Yamada
Y
Y
Kon
Y
Y
Kimura
T
T
D000818:Animals; D015519:Bone Density / Q000187:drug effects; D001842:Bone and Bones / Q000378:metabolism / Q000473:pathology; D004365:Drugs, Chinese Herbal / Q000627:therapeutic use*; D005260:Female; D007564:Japan; D008855:Microscopy, Electron, Scanning; D009929:Organ Size; D010024:Osteoporosis / Q000188:drug therapy* / Q000473:pathology; D010052:Ovariectomy; D051381:Rats; D017207:Rats, Sprague-Dawley
D004365:Drugs, Chinese Herbal; C118722:chujo-to