PMID: 12770311May 29, 2003Paper

Localization of the mosquito insulin receptor homolog (MIR) in reproducing yellow fever mosquitoes (Aedes aegypti)

Journal of Insect Physiology
P Helbling, R Graf

Abstract

The female mosquito takes a blood meal to produce a batch of eggs. Initiation of egg maturation and growth of oocytes is governed by several endocrine factors. Peptide factors from the brain are involved in this process and some are also responsible for the induction of ecdysone secretion. The latter appears to be required to maintain a high rate of vitellogenin synthesis. By analogy with the known functions of insulin-like molecules (e.g. bombyxins) which in insects activate the secretion of ecdysteroids, we have postulated that there is an insulin receptor homolog responsible for activation of endysone secretion in the ovary. We have recently cloned the mosquito homolog (MIR) and are now investigating its spatial and temporal distribution. Here, we have localized the insulin receptor (MIR) both at the mRNA and protein level using in situ-hybridization and immunocytochemistry. The receptor is expressed before a blood meal mainly in the nurse cells of ovaries. After a meal, follicle and nurse cells contain mRNA coding for the receptor. The intensity of expression rises in the follicle cells until they degenerate during choriogenesis. Immunocytochemical localization confirms the in situ data: the protein is present before and af...Continue Reading

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Citations

Oct 21, 1999·Insect Biochemistry and Molecular Biology·M A Riehle, M R Brown
Feb 4, 2011·Insect Biochemistry and Molecular Biology·R Parthasarathy, Subba R Palli
Dec 4, 2008·Insect Biochemistry and Molecular Biology·Shi-Hong GuChien-Hung Chen
Jun 4, 2015·Scientific Reports·Jingjing XuSubba Reddy Palli
May 17, 2005·Insect Biochemistry and Molecular Biology·Geoffrey M AttardoAlexander S Raikhel

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