抄録
The localization of four biologically active peptides was studied by immunohistochemistry in the coeliac plexus and in the first ganglion of the frog sympathetic chain. Perineuronal preganglionic apparatuses reacting with anti-LH-RH were found in both ganglia. Counts of neurons provided with such an apparatus and of neurons devoid of it led to the conclusion that almost all small neurons (diameter<35μm) have a positive apparatus, while the larger ones (diameter>35μm) must be divided into two groups: about 25% are provided with an apparatus, and the others not. In the coeliac plexus the distribution of certain peptides is different from that of the paravertebral ganglion. The coeliac plexus contains more neurons provided with a pericellular reacting with anti-substance P than Paravertebral ganglia. Moreover, the coeliac plexus contains numerous SIF cell reactive with anti-met enkephalin and anti-neuropeptide Y, and some reactive with anti-LH-RH and anti-substance P, which were not encountered in other ganglia.
