Calpain Activity in Rat Renal Proximal Tubules: An In Situ Assay
互联网
585
Although considerable information about calpain has been obtained from studies using isolated enzyme preparations, this does
not permit the dynamic assessment of intracellular protease activity during changes in intracellular Ca2+
and pH. Intracellular calpain activity is regulated by complex interactions with the specific inhibitory protein (calpastatin),
Ca2+
and phospholipids, conditions which are difficult to duplicate in isolated systems. Thus a method to measure calpain activity
over time in living cells would be helpful in studying its regulation and physiological roles.
