[Endogenous opioid peptides in physiologic and pathologic states with particular regard to kidneys].

The paper describes the endogenous opioid system: opioid peptides and opioid receptors as well as their participation to various physiological and pathological processes of the body. The special stress is put on the role of endogenous opioids in the pathogenesis of the uremic syndrome in connection with the results of author's own investigations.