当前位置： SCI文献检索 > INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY期刊下所有文献 > Vasopressin-like peptide and its receptor function in an indirect diuretic signaling pathway in the red flour beetle.

Vasopressin-like peptide and its receptor function in an indirect diuretic signaling pathway in the red flour beetle.

Abstract：

:The insect arginine vasopressin-like (AVPL) peptide is of special interest because of its potential function in the regulation of diuresis. Genome sequences of the red flour beetle Tribolium castaneum yielded the genes encoding AVPL and AVPL receptor, whereas the homologous sequences are absent in the genomes of the fruitfly, malaria mosquito, silkworm, and honeybee, although a recent genome sequence of the jewel wasp revealed an AVPL sequence. The Tribolium receptor for the AVPL, the first such receptor identified in any insect, was expressed in a reporter system, and showed a strong response (EC(50)=1.5 nM) to AVPL F1, the monomeric form having an intramolecular disulfide bond. In addition to identifying the AVPL receptor, we have demonstrated that it has in vivo diuretic activity, but that it has no direct effect on Malpighian tubules. However, when the central nervous system plus corpora cardiaca and corpora allata are incubated along with the peptide and Malpighian tubules, the latter are stimulated by the AVPL peptide, suggesting it acts indirectly. Summing up all the results from this study, we conclude that AVPL functions as a monomer in Tribolium, indirectly stimulating the Malpighian tubules through the central nervous system including the endocrine organs corpora cardiaca and corpora allata. RNA interference in the late larval stages successfully suppressed mRNA levels of avpl and avpl receptor, but with no mortality or abnormal phenotype, implying that the AVPL signaling pathway may have been near-dispensable in the early lineage of holometabolous insects.

journal_name

Insect Biochem Mol Biol

journal_title

Insect biochemistry and molecular biology

authors

Aikins MJ,Schooley DA,Begum K,Detheux M,Beeman RW,Park Y

doi

10.1016/j.ibmb.2008.04.006

subject

Has Abstract

pub_date

2008-07-01 00:00:00

pages

740-8

issue

7

eissn

0965-1748

issn

1879-0240

pii

S0965-1748(08)00072-6

journal_volume

38

pub_type

杂志文章

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