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Metabolism of juvenile hormone in cultures of ovaries and fat body in the cockroach periplaneta americana






In Vitro (Rockville) 14(11): 956-960

Metabolism of juvenile hormone in cultures of ovaries and fat body in the cockroach periplaneta americana

Time course of juvenile hormone (JH) metabolism is examined in cultures of [newly emerged] P. americana fat body and ovaries in medium containing Manduca sexta carrier protein or cockroach hemolymph. In the absence of M. sexta carrier protein or cockroach hemolymph, both tissues extensively catabolize exogenous [3H]JH in the medium. Addition of the carrier protein or hemolymph to the culture system prevents the hydrolysis of the hormone in the medium. JH is degraded within the tissues whether or not carrier protein or hemolymph is present, suggesting that the protective role of these molecules is exclusively extracellular. Incubation of [3H]JH in medium preconditioned with tissue results in destruction of the hormone. The fat body may secrete esterases into the medium. The ovarioles hydrolyze the hormone by means of cell-associated enzymes. The relationship of these phenomena to insect development is discussed.


Accession: 005884330

DOI: 10.1007/bf02616127



Related references

Sarojini, S.; Chakko, T.V., 1975: Incorporation of acetate-1-12C into lipids of the ovaries & the fat body of the cockroach Periplaneta americana (Linn.) during oocyte development. The incorporation of acetate labelled with 14C into the lipids of the fat-body and ovaries of Periplaneta americana (L.) was studied in females during early and late oogenesis and in vitro and fat-body and ovaries dissected from such females. The...

Sarojini, S.C.akko, T., 1975: Incorporation of acetate-1-14C into lipidsof the ovaries & the fat body of the cockroach Periplaneta americana (Linn.) during oocyte development. Indian journal of experimental biology: 13 (3) 306-307

D.K.rt S.; Koopmanschap B., 1989: Binding of juvenile hormone iii to lipophorin from the american cockroach periplaneta americana. Whole hemolymph from the American cockroach, Periplaneta americana, efficiently binds juvenile hormone (JH) III and to a lesser extent JH-I and 10,11-epoxyfarnesyl diazoacetate (EFDA). The dissociation constants for racemic JH-III and EFDA are 30...

Pau R.N.; Weaver R.J.; Edwards Jones K., 1986: Regulation of cockroach periplaneta americana oothecin synthesis by juvenile hormone. Archives of Insect Biochemistry & Physiology (SUPPL 1): 59-74

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Shaaya, E., 1978: Ecdysone and juvenile hormone activity in the larvae of the cockroach Periplaneta americana. Changes in ecdysone and juvenile hormone titre during the sixth nymphal instar of Periplaneta americana (L.) were studied. Juvenile hormone was secreted mainly in the second quarter of the instar, while the ecdysone titre increased gradually in th...

Richter, K.; Gronert, M., 2003: Neurotropic effect of juvenile hormone III in larvae of the cockroach, Periplaneta americana. Juvenile hormone III and juvenile hormone analogs (methoprene, farnesyl methyl ether) cause a short-term depression of spike activity in last instar larvae of the cockroach Periplaneta americana, specifically in the prothoracic gland nerves, both...

Brooks, G.T.; Pratt, G.E.; Ottridge, A.P.; Mace, D.W., 1984: The inhibition of juvenile hormone III biosynthesis in corpora allata of the cockroach, Periplaneta americana L., in vitro. The spontaneous biosynthesis of juvenile hormone III [methyl 9-(3,3-dimethyloxiranyl)-3,7-dimethyl-2,6-nonadienoate] in excised corpora allata of Periplaneta americana was inhibited by a number of 2-propynyl ethers and 1,3-benzodioxole derivatives...

Brooks, G.T.; Pratt, G.E.; Mace, D.W.; Cocks, J.A., 1985: Inhibitors of juvenile hormone biosynthesis in corpora allata of the cockroach Periplaneta americana (L.) in vitro. The spontaneous biosynthesis of JH-III [methyl 9-(3,3-dimethyloxiranyl)-3,7-dimethyl-2,6-nonadienoate] in excised corpora allata of Periplaneta americana was inhibited by a number of synthetic 2-propynyl ethers and 1,3-benzodioxole derivatives. On...

Sams, G.; Bell, W., 1977: Juvenile hormone initiation of yolk deposition in vitro in the ovary of the cockroach, Periplaneta americana. Advances in invertebrate reproduction: 404-413