| Literature DB >> 15033329 |
Márcia Renata Mortari1, Elisabeth N Ferroni Schwartz, Carlos Alberto Schwartz, Osmindo Rodrigues Pires, Marcello Moreira Santos, Carlos Bloch, Antonio Sebben.
Abstract
Epipedobates flavopictus, Dendrobatidae, is a small aposematic frog found in Brazilian Cerrado bioma. In the present work, we isolated and characterized chemically the most abundant alkaloids present in the cutaneous extract of E. flavopictus. The specimens were collected in Pirenópolis (Goiás, Brazil), their skins were removed and extracted with methanol, and submitted to purification by HPLC and identification by gas chromatography and mass spectrometry. Pumiliotoxin 251D, histrionicotoxin 285Da and two decahydroquinolines, 219A and 243A, were identified. The pumiliotoxin 251D was tested on isolated frog sciatic nerve and on isolated guinea pig ileum muscle. The pumiliotoxin 251D slightly reduced the action potentials amplitude of frog sciatic nerve. The crude skin extract of E. flavopictus and the pumiliotoxin 251D produced rhythmic contractions and increased the muscular tension on isolated guinea pig ileum.Entities:
Mesh：
Substances：
Year: 2004 PMID： 15033329 DOI： 10.1016/j.toxicon.2004.01.001
Source DB: PubMed Journal: Toxicon ISSN： 0041-0101 Impact factor: 3.033