Inhibitory effect of metalloporphyrins in conjunction with cholesterol on hepatic phospholipase A2 activityin vivo in rats |
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| Authors: | Ramesh Chandra Manisha Tiwari Ritu Aneja Sujata K Dass Archana Sharma |
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| Institution: | (1) Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Post Box No. 2148, 110007 Delhi, India |
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| Abstract: | We investigated the effect of cholesterol and the metalloporphyrins cobalt mesoporphyrin (CoMP) and chromium protoporphyrin
(CrPP) on phospholipase A2 (PLA2) activity and the consequent hepatic mitochondrial stability as well as on lipid concentrations. Our studies revealed that
on administration of cholesterol, CrPP, CoMP as well as simultaneous adminstration of cholesterol and CrPP, there was an inhibition
of PLA2 activity. These moieties may therefore, be agents for preventing destabilisation of the mitochondrial membrane and the consequent
pathological conditions which may arise due to membrane lysis. Our results revealed that cholesterol administration increased
phospholipid concentration, albeit by modest amounts. Although the independent administration of metalloporphyrins led only
to minor elevations in phospholipid concentration, the simultaneous administration of cholesterol and CrPP generated a steep
elevation in the concentration of total phospholipid. Since cholesterol inhibits PLA2 activity it has the potential of being therapeutic agent for preventing the pathological conditions which may arise due to
membrane lysis. |
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| Keywords: | Metalloporphyrins Phospholipase A2 (PLA2) Cholesterol Phosphatidyl choline (PC) Lysophosphatidyl choline (LPC) Glyceride Phospholipids |
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