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Autor:
J.E. Steele, E. Oguri
Publikováno v:
Pesticide Biochemistry and Physiology. 87:196-203
Several effects of hypertrehalosemic hormone (Peram-HTH) have been compared with the action of 1,2,3,4,5,6-hexachlorocyclohexane (γ-HCH) in the cockroach, Periplaneta americana . The data show that both agents stimulate respiration while maintaining
Publikováno v:
Archives of Insect Biochemistry and Physiology. 50:41-51
Protein kinase C and calmodulin play key roles in cockroach fat body during activation of phosphorylase and trehalose efflux by HTH-II. The data support the view that an increase in cytosolic Ca2+ is prerequisite for enhanced activity of protein kina
Autor:
J.E. Steele, Shigui Liu
Publikováno v:
Pesticide Biochemistry and Physiology. 49:146-154
Hyperglycemic hormone is released into the hemolymph of cockroaches ( Periplaneta americana ) that have been stressed by immobilization, starvation, or treatment with lindane. The release of hyperglycemic hormone is accompanied by a strong increase i
Autor:
J.E. Steele, M.A. Khan
Publikováno v:
Journal of Insect Physiology. 38:659-664
Using [ 3 H]tryptophan as a precursor, the rate of production and release of cardioacceleratory hormone-I and -II by isolated corpora cardiaca of Periplaneta americana was quantified in vitro . Striking differences in the rate of radiolabelled trypto
Autor:
J.E. Steele, D. Sun
Publikováno v:
Journal of insect physiology. 47(12)
Incubation of trophocytes from dissaggregated fat body of Periplaneta americana with either of the hypertrehalosemic hormones, HTH-I or HTH-II, leads to an increase in the cytosolic concentration of Ca(2+) from approximately 80 to approximately 310nM
Autor:
J.E. Steele, D. Sun
Publikováno v:
Journal of insect physiology. 48(5)
Phospholipase A(2) (PLA(2)) associated with the membrane fraction of trophocytes from Periplaneta americana fat body increases by as much as 100% when the cells are incubated with hypertrehalosemic hormone (HTH-II). Activation with HTH-II is approxim
Publikováno v:
Journal of insect physiology. 44(11)
The hypertrehalosemic hormones, HTH-I and HTH-II, activate trehalose synthesis and increase the rate of sugar efflux from Periplaneta americana fat body in vitro. These processes are unaffected by the diacylglycerol, 1-oleyl-2-acetyl-sn-glycerol, an