title: Prevention by tetrandrine of spontaneous development of diabetes mellitus in BB rats.
abstract: Treatment of BB rats with the plant alkaloid tetrandrine (20 mg.kg-1.day-1), a novel anti-inflammatory compound, from 35 to 120 days of age reduced the cumulative incidence of spontaneous diabetes from 75.5 to 10.9% (P less than 0.001). Dose-response studies with 0, 5, 10, and 20 mg.kg-1.day-1 of tetrandrine from 35 to 130 days resulted in spontaneous diabetes in 84.2, 63.1, 31.6, and 5.3% of the rats, respectively. When the start of treatment with 20 mg.kg-1.day-1 tetrandrine was delayed until 70 days of age, there was a significant reduction of the incidence of diabetes from 63.1 to 28.6% (P less than 0.01). Histological examination of the pancreases from tetrandrine-treated rats showed a lesser degree of insulitis than controls (P less than 0.01). Drug toxicity was not seen in the rats, as assessed by appearance, behavioral change, organ histology, and blood chemistry. These results provide some hope that tetrandrine may be of value in preventing diabetes and treating newly diagnosed diabetic subjects, either by itself or in combination with a more potent immunosuppressive agent.
authors.affiliation: Department of Anatomy and Cell Biology, University of Pittsburgh School of Medicine, Pennsylvania.
authors.forename: I
authors.initials: I
authors.lastname: Lieberman
authors.forename: D P
authors.initials: DP
authors.lastname: Lentz
authors.forename: G A
authors.initials: GA
authors.lastname: Trucco
authors.forename: W K
authors.initials: WK
authors.lastname: Seow
authors.forename: Y H
authors.initials: YH
authors.lastname: Thong
mesh_terms: D000470:Alkaloids / Q000009:adverse effects / Q000627:therapeutic use*; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects / Q000627:therapeutic use*; D044182:Benzylisoquinolines; D003922:Diabetes Mellitus, Type 1 / Q000150:complications / Q000473:pathology / Q000517:prevention & control*; D004305:Dose-Response Relationship, Drug; D005260:Female; D008297:Male; D010179:Pancreas / Q000473:pathology; D015995:Prevalence; D051381:Rats; D011913:Rats, Inbred BB
chemical_list: D000470:Alkaloids; D000894:Anti-Inflammatory Agents, Non-Steroidal; D044182:Benzylisoquinolines; C009438:tetrandrine