- 著者
- Atsushi Watanabe Shigeki Yoneyama Mikio Nakajima Norihiro Sato Ryoko Takao-Kawabata Yukihiro Isogai Aki Sakurai-Tanikawa Kazuhiro Higuchi Akihito Shimoi Hideyuki Yamatoya Kenji Yoshida Terutomo Kohira
- 出版者
- The Japanese Society of Toxicology
- 雑誌
- The Journal of Toxicological Sciences (ISSN:03881350)
- 巻号頁・発行日
- vol.37, no.3, pp.617-629, 2012-06-01 (Released:2012-06-01)
- 参考文献数
- 14
- 被引用文献数
- 57 69
Teriparatide, a therapeutic agent for osteoporosis, has been reported to increase the incidences of bone neoplasms such as osteosarcoma when administered subcutaneously to Fischer 344 (F344) rats for a long term, but its non-carcinogenic dose level following 2-year daily administration has not been established. Here we report detailed studies on the carcinogenicity of teriparatide following long-term administration. When teriparatide was administered subcutaneously to male and female Sprague-Dawley (SD) rats daily for 2 years, the incidence of osteosarcoma was increased at 13.6 μg/kg/day. The non-carcinogenic dose level was 4.5 μg/kg/day for both males and females. The development of osteosarcoma in SD rats depends on the dose level of, and treatment duration with, teriparatide. Responses of the bones to teriparatide were similar between F344 and SD rats in many aspects. These results suggested that the carcinogenic potential of teriparatide in SD rats is essentially the same as in F344 rats.
- 著者
- Masayoshi Furushiro Satoru Suzuki Yoshiyuki Shishido Masashi Sakai Hideyuki Yamatoya Satoshi Kudo Shusuke Hashimoto Teruo Yokokura
- 出版者
- The Japanese Pharmacological Society
- 雑誌
- The Japanese Journal of Pharmacology (ISSN:00215198)
- 巻号頁・発行日
- vol.75, no.4, pp.447-450, 1997 (Released:2006-03-27)
- 参考文献数
- 15
- 被引用文献数
- 20 21
Soybean lecithin transphosphatidylated phosphatidylserine (SB-tPS) was investigated for its effect on the impaired learning of a passive avoidance task by mice induced by scopolamine or cycloheximide. SB-tPS (240, 360, 480 mg/kg) administered orally significantly prolonged the step-through latency shortened by scopolamine. SB-tPS (240 mg/kg) administered orally also prolonged the step-through latency shortened by cycloheximide. These results suggest that the effect of SB-tPS on the impaired learning behavior may be related not only to the cholinergic system but also the serotonergic system.