title: [Localization of cystathionine beta-synthase in digestive tract of the masu salmon Onchorhynchus masou (Teleostei)].
abstract: By immunohistochemical method the hydrogen sulfide (H2S)-producing system was studied in digestive tract in fry and adult individuals of the masu salmon Onchorhynchus masou. The total and age-related peculiarities have been revealed in morphology, distribution, and the amount of enteral cystathionine beta-synthase (CBS)-immunopositive neurons. They have been established to be present in fry only in esophagus a stomach, while in adult fish--along the entire length of the digestive tract, the number of marked cells in esophagus, stomach, and distal intestine exceeding that in the proximal and middle intestines. In fry and in adult fish the neurons and nerve fibers are located in branches of vagus, in intermuscular and submucosal nerve plexuses, in serosal and muscle layers. There are detected uni-, bi-, and much seldom the multipolar neurons surrounded by numerous poorly and undifferentiated nerve cells. Besides, the CBS-immunopositive netve fibers were present in the subepithelial area of the duct of swim bladder.
authors.forename: E A
authors.initials: EA
authors.lastname: Pimenova
authors.forename: A A
authors.initials: AA
authors.lastname: Varaksin
mesh_terms: D000818:Animals; D003541:Cystathionine beta-Synthase / Q000378:metabolism*; D004947:Esophagus / Q000201:enzymology; D005260:Female; D041981:Gastrointestinal Tract / Q000201:enzymology*; D007150:Immunohistochemistry / Q000379:methods; D007422:Intestines / Q000201:enzymology; D008297:Male; D009412:Nerve Fibers / Q000201:enzymology; D012474:Salmon; D013270:Stomach / Q000201:enzymology; D014018:Tissue Distribution
chemical_list: D003541:Cystathionine beta-Synthase