Biological activities of skin secretions of the salamander Tylototriton verrucosus.
Water-soluble skin secretions of salamander Tylototriton verrucosus, first described by Anderson in 1871, were studied for their biological and enzymatic activities. They were found to be toxic to mice with an intraperitoneal LD50 of 11.5 mg/kg. Using Sephadex G-75 gel filtration, it was proven that the toxic components of the secretions are proteins with molecular weights ranging from 30,000 to 50,000 Da. The secretions of T. verrucosus display a wide spectrum of antimicrobial activities and also contain both proteolytic activity and trypsin inhibitory activity. In contrast, neither hemolytic nor hemorrhagic activities were found. The secretions were determined to have phospholipase A2 activity; however, no acetylcholine esterase activity was detectable under the assay conditions.
Lai
Ren
R
Yang
Dong-Ming
DM
Lee
Wen-Hui
WH
Zhang
Yun
Y
D000818:Animals; D005260:Female; D007928:Lethal Dose 50; D008297:Male; D051379:Mice; D010741:Phospholipases A / Q000494:pharmacology; D054467:Phospholipases A2; D012867:Skin / Q000737:chemistry* / Q000378:metabolism*; D014562:Caudata
D010741:Phospholipases A; D054467:Phospholipases A2