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The distribution and location of atrial natriuretic peptides(ANP) in the cochlear stria vaseularis of normal guinea pigswere studied to find out regional regulating factors of cochlearblood flow (CBF) and productive foundation of cochlearendolymph by ABC immunocytochemistry and immunoele-ctronmicroscopy. The ANP-IR products were seen in the striavascularis of the 1-4 turns of the lateral wall of the cochlea,more markedly along its margin; and were negative in the spi-ral ligaments. Immunoelectronmicroscopically, a plenty ofsphericals of 250-350nm in diameter were noted in thecytoplasm of marginal and intermediate cells, but few in thebasal cells. The results suggest that the cochlear striavascularis had the function of secreting ANP in the guinea pig.
The distribution and location of atrial natriuretic peptides (ANP) in the cochlear stria vaseularis of normal guinea pigswere studied to find out regional regulatory factors of cochlear flow (CBF) and productive foundation of cochlearendolymph by ABC immunocytochemistry and immunoele-ctron microscopy. The ANP-IR products were seen in the striavascularis of the 1-4 turns of the lateral wall of the cochlea, more markedly along its margin; and were negative in the spi-ral ligaments. Immunoelectronmicroscopically, a plenty of spheres of 250-350 nm in diameter were noted in thecytoplasm of marginal and intermediate cells, but few in the basal cells. The results suggest that the cochlear striavascularis had the function of secreting ANP in the guinea pig.