A proposed role for silicates and protein in the proliferative effects of saccharin on the male rat urothelium |
| |
Authors: | S M Cohen M Cano R A Earl S D Carson E M Garland |
| |
Affiliation: | Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha 68198-3135. |
| |
Abstract: | High doses of sodium saccharin, a non-genotoxic chemical, lead to the formation of silicate-containing precipitate and microcrystals in urine of male rats. Differences in urinary protein, pH, sodium and other factors affect silicate-containing precipitate and microcrystal formation as well as the bladder effects of sodium saccharin. Total urinary silicon concentration (mostly soluble) in sodium saccharin-fed rats is similar to or lower than the concentration in control rats. Binding of saccharin to male rat urinary proteins was demonstrated by equilibrium-gel filtration. We propose that by binding to urinary proteins under appropriate conditions, saccharin produces a nidus for the formation of silicate-containing precipitate and crystals. These appear to be cytotoxic to the superficial bladder epithelium, with cell death resulting in regenerative hyperplasia. Factors that influence the formation of these silicate-containing materials might provide a rationale for sex, species, dose and dietary differences in response to sodium saccharin. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|