title: Modulatory influence of juvenile hormone analogue (JHa) and 20-hydroxyecdysone on lipophorin synthesis in red cotton bug, Dysdercus cingulatus Fabr.
abstract: Topical supply of methoprene, a juvenile hormone analogue (JHa) caused notable morphological disturbance in insects. Topical supply of methoprene to newly emerged adult female D. cingulatus caused notable disturbance and induced a dramatic reduction in the total haemolymph protein pattern and lipophorin production in tissues like fat body, ovary and haemolymph. Total protein concentration in haemolymph also showed significant reduction in 1 day old insects but increased slightly as age advanced. Application of 20-hydroxyecdysone (20-HE) to 2-day-old adult female stimulated protein synthesis intensively. Lipophorin levels in fat body and ovary also simultaneously increased. Densitometric analysis revealed that methoprene inhibits while 20-HE stimulates lipophorin production in D. cingulatus.
authors.affiliation: Department of Zoology, University of Kerala, Trivandrum 695 581, India.
authors.forename: K G
authors.initials: KG
authors.lastname: Mohan
authors.forename: D
authors.initials: D
authors.lastname: Muraleedharan
mesh_terms: D000367:Age Factors; D000375:Aging / Q000502:physiology; D000818:Animals; D001798:Blood Proteins / Q000378:metabolism; D004441:Ecdysterone / Q000031:analogs & derivatives / Q000494:pharmacology*; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D006458:Hemolymph / Q000187:drug effects; D007313:Insecta / Q000187:drug effects*; D007605:Juvenile Hormones / Q000502:physiology; D008074:Lipoproteins / Q000096:biosynthesis*; D008726:Methoprene / Q000494:pharmacology*
chemical_list: C466606:20-hydroxyecdysone 2-acetate; D001798:Blood Proteins; D007605:Juvenile Hormones; D008074:Lipoproteins; C032830:lipophorin; D004441:Ecdysterone; D008726:Methoprene