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Related Experiment Videos

1,1,2,2-Tetrachloroethane-induced early decrease of dolichol levels in rat liver microsomes and Golgi apparatus

D Cottalasso1, A Bellocchio, C Domenicotti

  • 1Institute of General Pathology, University of Genoa, Italy. patgen@unige.it

Journal of Toxicology and Environmental Health. Part A
|July 4, 1998
PubMed
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1,1,2,2-tetrachloroethane (TTCE) exposure in rats significantly reduced dolichol phosphate levels, impacting glycosylation. TTCE also decreased total dolichol in the Golgi apparatus, suggesting disruption of glycoprotein processing.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Toxicology

Background:

  • Dolichols are vital lipids involved in protein glycosylation.
  • Dolichyl phosphate (Dol-P) levels are critical for N-glycosylation.
  • Previous research indicated dolichols are susceptible to radical damage.

Purpose of the Study:

  • To investigate the effect of 1,1,2,2-tetrachloroethane (TTCE) on dolichol metabolism in rat liver.
  • To determine if TTCE-induced free radicals impact dolichol levels and glycosylation.

Main Methods:

  • Rats were administered a single dose of TTCE.
  • Liver microsomes and Golgi apparatus were analyzed for dolichol forms (Dol-P, Free-Dol, Dol-FA).
  • Enzyme activities (AST, ALT, G6Pase) and triglyceride levels were measured.

Related Experiment Videos

Main Results:

  • TTCE increased serum AST, ALT, and hepatic triglycerides.
  • Microsomal dolichyl phosphate (Dol-P) levels significantly decreased 15 minutes post-TTCE.
  • Total dolichol content in the Golgi apparatus significantly decreased 5 minutes post-TTCE.

Conclusions:

  • TTCE exposure alters dolichol distribution and levels in rat liver.
  • The reduction in Dol-P suggests impaired N-glycosylation processes.
  • TTCE may disrupt glycoprotein maturation and secretion by affecting dolichol functions.