[Tissue-specific regulation of rat liver mitochondrial oxidative phosphorylation by a soluble phase of cells from that organ].

Tissue specificity of mitochondrial respiration stimulation under the effect of a soluble phase of liver cells (SPC) is preserved by addition to dinitrophenol but is reserved in the presence of oligomycin. Addition of rotenon in the presence of SPC entails a tissue-specific increase in respiration that is proportional to the respective increase in respiration of intact mitochondria in the presence of the inhibitor mentioned. SPC tissue-specifically inhibits ATPase activity of liver mitochondria. This fraction of SPC is capable of recovering the coupling of oxidative phosphorylation of mitochondria whose respiration is inhibited by adding ADP. A conclusion is made that SPC is capable not only to decrease tissue-specifically the coupling of intact mitochondria but also to raise it in mitochondria with deranged oxidative phosphorylation. This assures intratissue organization of liver metabolism by means of tissue-specific stabilization of liver cell energy metabolism.