Ectopic expression of 5-HT7Scer\UAS.cKa in adult male flies (under the control of Scer\GAL4Ilp2.PW results in a significantly reduced lifespan at starvation.
5HT stimulates cAMP production in a dose-dependent manner in Malpighian tubules isolated from 5-HT7Scer\UAS.cKa; Scer\GAL4c42 or 5-HT7Scer\UAS.cKa; Scer\GAL4tsh-c724 flies. This is acompanied by an increase in fluid secretion from the tubules. cGMP levels are unaffected. These increases in fluid secretion and cAMP levels are both inhibited by butaclamol.