ZHOU Bo, et al. Pattern of protein kinase C isoforms expression in retinal vasculature of diabetic rats[J]. Journal of Chongqing Medical University, 2003,(3):267-269.
ZHOU Bo, et al. Pattern of protein kinase C isoforms expression in retinal vasculature of diabetic rats[J]. Journal of Chongqing Medical University, 2003,(3):267-269. DOI: 10.13406/j.cnki.cyxb.2003.03.004.
Objective:To clarify the characteristics of protein kinase C(PKC)activity and its isoforms expression pattern in retinal vessels in diabetic rats.Methods:Osmotic shock method was used to isolate the retinal vessels of rats;in situ PKC catalytic activity was determined after 2 mo follow-up;α?β?γ?δ?ε?ζ-PKC in the membrane and cytosolic fraction were determined by western blot.Results:Diabetes result in>180% elevation of PKC activity in the retinal vasculature.α?β?δ?ζ?except γ?ε distributed in the membrane and cytosolic fraction in retinal vessels in normal or diabetic rats
the expression of α?β?ζ-PKC significantly increase in the membrane pool OD Value 282%±32%?340%±26%?187%±14% respectively
but α?β?ζ-PKC expression significantly decrease in cytosolic pool in retinal vessels of diabetic rats compared with nondiabetic rats
OD value 71%±11%?63%±8%?84%±6%
respectively
however δ isoenzym expression in cytosolic pool significantly increase 208%±6%
compared with normal rats.Conclusion:Diabetes can induce the translocation of α?β?ζ-PKC from cytosol to membrane pool
but δ isoform translocated from membrane to cytosol pool in retinal vessels of diabetic rats.