Effects of treatment with a single intra-peritoneal (i.p.) injection (0.84mgCd/kg body weight) of cadmium (Cd) on lipid/phospholipids profiles of rat brain microsomes and mitochondria were examined. At the end of one-week following treatment with Cd the microsomal total phospholipids (TPL) content was unchanged but the cholesterol (CHL) content increased. In one-month Cd-treated group both TPL and CHL contents increased. In one-week Cd-treated group the content of phosphatidylinositol (PI) decreased whereas that of lysophospholipid and phosphatidic acid (PA) increased. In one-month Cd-treated group the sphinghomyelin (SPM) and phosphatidycholine (PC) components increased whereas phosphatidyethanolamine (PE) and PA decreased. In mitochondria, CHL content increased in both Cd-treated groups. The content of TPL decreased only in one-month Cd-treated group. In one-week Cd-treated group the lysophospholipids increased whereas PI and phosphatidylserine (PS) decreased. In one-month group the lysophospholipids, PI and diphosphatidylglycerol (DPG) components decreased whereas PS and PE component increased. The results suggest that exposure to a single dose of Cd has differential and long-lasting effects on lipid/phospholipids profiles of rat brain microsomes and mitochondria.
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