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Malpighian tubules of larval Aedes aegypti are hormonally stimulated by 5-hydroxytryptamine in response to increased salinity


, : Malpighian tubules of larval Aedes aegypti are hormonally stimulated by 5-hydroxytryptamine in response to increased salinity. Archives of Insect Biochemistry & Physiology 34(2): 123-141

Two environmental parameters, feeding status and salinity, are expected to affect water and ion balance of the aquatic larvae of Aedes aegypti. Evidence was obtained for regulation of Malpighian tubule fluid secretion rates in response to changes in each of these parameters. Exposure to increased salinity induces release into the hemolymph of material with diuretic effects on Malpighian tubules. Diuretic material is present in hemolymph of larvae raised in higher salinities, rapidly appears in the hemolymph of larvae following transfer from dilute water to higher salinity, and rapidly disappears from the hemolymph following transfer from higher salinity to dilute water. Feeding status affects diuretic properties of both hemolymph and Malpighian tubules. Feeding causes hemolymph to become diuretic relative to hemolymph from nonfeeding larvae. Malpighian tubules removed from feeding larvae have greater basal fluid secretion rates and also appear to have greater maximal fluid secretion capacity than do tubules removed from nonfeeding larvae. Larval hemolymph (5-HT) was found to increase fivefold in response to elevated salinity but was unaffected by feeding status. Methiothepin, a 5-HT receptor antagonist, inhibited stimulation of fluid secretion by 5-HT and blocked the diuretic effects of hemolymph from larvae exposed to higher salinity but was without effect on stimulation of fluid secretion by diuretic peptide. During the course of this investigation, a preliminary pharmacological characterization of the 5-HT receptor on Aedes Malpighian tubules, suggesting that this receptor may be pharmacologically distinct from other described insect 5-HT receptors, was obtained.

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Accession: 002889555

DOI: 10.1002/(sici)1520-6327(1997)34:2<123::aid-arch1>3.0.co;2-y

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Linder, J.; Shelburne, J.D.; Sorge, J.P.; Whalen, R.E.; Hackel, D.B., 1984: Congenital endodermal heterotopia of the atrioventricular node: evidence for the endodermal origin of so-called mesotheliomas of the atrioventricular node. A case of so-called mesothelioma of the atrioventricular node is presented. Controversy exists as to whether this lesion is of mesodermal or endodermal origin. The light and electron microscopic morphologic characteristics in this case were identi...

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Palladina, O.K.; Anoshkina, A.A., 1958: Stabel and highly active ferments for lactic acid products. Laboratory cultures of lactic acid bacteria degenerate rapidly under industrial conditions, whereas the natural lactic acid ferments have great stability. A large part of the lactic acid micro-flora of products of spontaneous lactic acid fermentat...

Chu, V.Trung.; Graf, R.; Wirtz, T.; Weber, T.; Favret, J.; Li, X.; Petsch, K.; Tran, N.Tung.; Sieweke, M.H.; Berek, C.; Kühn, R.; Rajewsky, K., 2016: Efficient CRISPR-mediated mutagenesis in primary immune cells using CrispRGold and a C57BL/6 Cas9 transgenic mouse line. NlmCategory="UNASSIGNED">Applying clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR associated protein 9 (Cas9)-mediated mutagenesis to primary mouse immune cells, we used high-fidelity single guide RNAs (sgRNA...

Groninger, H.S.; Tappel, A.L.; Knapp, F.W., 1956: Some chemical and organoleptic changes in gamma irradiated meats. Chemical and organoleptic quality changes were studied in irradiated meats. In all irradiated meats analyzed thiamine was very labile. The carotenoid pigment of salmon was extensively destroyed. Hematin pigments of irradiated fresh meat were gener...

Lelkes, Z.; Alfoldi, F.J.O.al P.; Erdos, A.; Rubicsek, G.; Benedek, G., 1994: Effects of acute and chronic treatment with trazodone, and antidepressant, on the sleep-wake activity in rats. Rats were treated with trazodone (2.5 or 10 mg kg-1) twice a day (at light and dark onset) for 11 days, after chronic injection of physiological saline. The steep-wake activity was recorded for 24 h on the baseline day (saline), on trazodone days...

Wheat, J.D.; Spies, H.G.; Tran, C.T.; Koch, B.A., 1962: Response of guinea pig inbred lines to two protein levels. Jour Animal Sci 21(4): 977

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