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Mode of action studies on a Manduca sexta diuretic hormone
Author(s) -
Troetschler Ruth G.,
Kramer Steven J.
Publication year - 1992
Publication title -
archives of insect biochemistry and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.576
H-Index - 66
eISSN - 1520-6327
pISSN - 0739-4462
DOI - 10.1002/arch.940200105
Subject(s) - manduca sexta , sphingidae , biology , malpighian tubule system , endocrinology , manduca , medicine , mode of action , diuretic , hormone , in vivo , larva , biochemistry , botany , microbiology and biotechnology , midgut
Abstract The mode of action of a diuretic hormone from pharate adult Manduca Sexta heads, which triggers fluid loss in M. sexta larvae and Pieris rapae adults, was studied. In vivo, Mas‐DH ( M. sexta diuretic hormone) decreased fluid absorption from larval recta, and increased levels of the second messenger cAMP in recta and Malpighian tubules (Mt) from larvae, and in fat body of larvae and adult M. sexta . In vitro, Mas‐DH triggered minor changes in fluid loss from adult Mt, but did not affect levels of cAMP in Mt from larvae, pharate adults, or adults, though it elevated cAMP levels in fat body of these stages. © 1992 Wiley‐Liss, Inc.