IMMUNOCYTOCHEMICAL STUDY OF THE LUNG OF DOMESTIC-FOWL AND PIGEON - ENDOCRINE-CELLS AND NERVES

The presence of endocrine cells and nerves in the lung of 2 avian spec ies (Gallus gallus and Columba livia domestica) has been studied by pe roxidase-antiperoxidase (PAP) and avidin-biotin complex (ABC) immunocy tochemical methods at the light-microscopic level. Two immunoreactive cell-types have been identified in the epithelium of the primary and s econdary bronchi of chick lung: serotonin- and bombesin-immunoreactive cells; and 3 cell-types, namely, serotonin-, bombesin- and CGRP- (cal citonin gene related peptide) immunoreactive cells, have been located in the bronchial epithelium of pigeon lung. Co-localization of 2 diffe rent immunoreactivities within the same cell has not been detected. VI P-immunoreactive nerves have been observed in different locations in c hick lung.