Add time:08/23/2019         Source:sciencedirect.com

The effects of PANTETHINE (cas 138148-35-3) on LDL peroxidation in vitro are reported. LDL isolation by density gradient ultracentrifugation from 12 normal subjects were dialyzed 48 h under conditions allowing oxidation. The LDL peroxides were assayed for the presence of malondialdehyde (MDA) on the lipoprotein. The effect of peroxidation on the LDL protein moiety (apo B) was studied by SDS-gel electrophoresis. The presence in the dialysis buffer of 1 mM reduced glutathione or of an equimolar concentration of pantethine markedly inhibited the MDA formation in LDL. Less effective were 0.5 and 2 mM pantethine, while 10 mM pantethine did not prevent the LDL peroxidation. Both glutathione and pantethine (1 or 2 mM) preserved the original LDL electrophoretic mobility. The electronegative charge of LDL was correlated to the MDA production during the dialysis procedures. Freshly prepared LDL showed a single apo B band by SDS-gel electrophoresis (apo B-100). Following peroxidation 2 or 3 bands with higher molecular weight appeared. Both glutathione and pantethine (1 or 2 mM) strongly inhibited the appearance of higher molecular weight peptides. In appropriate concentrations therefore pantethine inhibits the LDL peroxidation in vitro, thus preserving the molecular integrity of apo B.

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