EVIDENCE THAT ECDYSIS IN THE LARVAL COCKROACH,Periplaneta americanaL. IS TRIGGERED BY AN INCREASE IN THE CONCENTRATION OF HEMOLYMPH SUGAR

2016 ◽  
Vol 92 (3) ◽  
pp. 159-172 ◽  
Author(s):  
John E. Steele
Keyword(s):  
Hemolymph Sugar

Appetite is correlated with octopamine and hemolymph sugar levels in forager honeybees

2019 ◽  
Vol 205 (4) ◽  
pp. 609-617 ◽  
Author(s):  
Christopher Mayack ◽  
Nicole Phalen ◽  
Kathleen Carmichael ◽  
Helen K. White ◽  
Frank Hirche ◽  
...  
Keyword(s):  
Sugar Levels ◽  
Hemolymph Sugar

Hyperglycemia in Freshwater Field Crab (Oziotelphusa senex senex) Produced by Pesticides

1985 ◽  
Vol 40 (7-8) ◽  
pp. 592-594
Author(s):  
K. S. Jagannatha Rao
Keyword(s):  
Hyperglycemic Hormone ◽  
Intact Crab ◽  
Hemolymph Sugar

Abstract DDT, Dieldrin DDT and Dieldrin produced a significant increase in the hemolymph sugar level of intact crab of Oziotelphusa senex senex apparently by triggering the release of hyperglycemic hormone (HGH).

scholarly journals Glucose-mediated expansion of a gut commensal bacterium promotes Plasmodium infection through alkalizing mosquito midgut

2020 ◽  
Author(s):  
Mengfei Wang ◽  
Yanpeng An ◽  
Shengzhang Dong ◽  
Yuebiao Feng ◽  
Li Gao ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Malaria Parasite ◽  
Commensal Bacterium ◽  
Mosquito Midgut ◽  
Major Energy Source ◽  
Metabolic Interactions ◽  
Dietary Sugar ◽  
Ph Increase ◽  
Midgut Ph ◽  
Hemolymph Sugar

SUMMARYDietary sugar is the major energy source for mosquitoes, but its influence on mosquitoes’ capability to transmit malaria parasite remains unclear. Here we show that Plasmodium berghei infection changes global metabolism of Anopheles stephensi with the most significant impact on glucose metabolism. Supplementation of glucose or trehalose (the main hemolymph sugar) to mosquito increases Plasmodium infection by alkalizing the mosquito midgut. The glucose/trehalose diets promote rapid growth of a commensal bacterium, Asaia bogorensis, which remodels glucose metabolism and consequently increases midgut pH. The pH increase in turn promotes Plasmodium gametogenesis. We also demonstrate the sugar composition from different natural plants influences A. bogorensis growth and Plasmodium infection is associated with their capability to expand A. bogorensis. Altogether, our results demonstrate that dietary glucose is an important factor that determines mosquito’s competency to transmit Plasmodium and further highlight a key role for mosquito-microbiota metabolic interactions in regulating development of malaria parasite.

scholarly journals Organotin-Induced Hyperglycemia in the Crab, Oziotelphusa senex senex Fabricius

2001 ◽  
Vol 56 (3-4) ◽  
pp. 315-318 ◽  
Author(s):  
G. Purna Chandra Nagaraju ◽  
Md. Riyaz Basha ◽  
P. Sreenivasula Reddy
Keyword(s):  
Organotin Compounds ◽  
Hyperglycemic Hormone ◽  
Hemolymph Sugar

AbstractInjection of three different organotin compounds such as tripalmitin, fentin and fenbutatin produced a significant increase in the hemolymph sugar level of intact crabs at Oziotelphusa senex senex apparently by stimulating release of the hyperglycemic hormone (HGH).

scholarly journals Physiological Alterations in Deletion Mutants of Two Insulin-Like Peptides Encoded in Maruca vitrata Using CRISPR/Cas9

2021 ◽  
Vol 12 ◽  
Author(s):  
Md. Abdullah Al Baki ◽  
Jin Kyo Jung ◽  
Yonggyun Kim
Keyword(s):  
Larval Development ◽  
Expression Patterns ◽  
Maruca Vitrata ◽  
Deletion Mutants ◽  
Altered Expression ◽  
Knock Out ◽  
Reduced Body ◽  
Physiological Processes ◽  
Sugar Levels ◽  
Hemolymph Sugar

Most insect species encode multiple insulin-like peptides (ILPs) that exhibit functional overlaps in mediating physiological processes such as development and reproduction. Why do they need multiple ILPs? To address this question, we tested a hypothesis of the requirement of multiple ILPs by generating mutants lacking individual ILP genes using the CRISPR/Cas9 technology. Two ILPs (ILP1 and ILP2) in the legume pod borer, Maruca vitrata, mediate similar physiological processes such as hemolymph sugar level, larval development, and adult reproduction. Individual knock-out mutants (ΔILP1 and ΔILP2) were generated. They showed successful development from larvae to adults. However, they suffered from high hemolymph sugar levels by enhancing trehalose titers in the hemolymph. The hyperglycemic effect was more evident in ΔILP2 mutants than in ΔILP1 mutants. Both mutants showed increased expression of trehalose-6-phosphate synthase but suppressed expression of trehalase. These mutants also showed altered expression patterns of insulin signaling components. Expression levels of insulin receptor and Akt genes were upregulated, while those of FOXO and Target of rapamycin genes were downregulated in these mutants. These alterations of signal components resulted in significant retardation of immature development and reduced body sizes. ΔILP1 or ΔILP2 females exhibited poor oocyte development. Bromo-uridine incorporation was much reduced at the germarium of ovarioles of these mutants compared with wild females. Expression of the vitellogenin gene was also reduced in these mutants. Furthermore, males of these deletion mutants showed impaired reproductive activities when they mated with wild-type females. These results suggest that both ILPs are required for mediating larval development and adult reproduction in M. vitrata.

Notizen: Hyperglycemia in the Fresh Water Field Crab (Oziotelphusa senex senex) Produced by a Pesticide (BHC)

1982 ◽  
Vol 37 (5-6) ◽  
pp. 545-546 ◽  
Author(s):  
P. Sreenivasula Reddy ◽  
S. B. Ramesh Babu ◽  
R. Ramamurthi
Keyword(s):  
Fresh Water ◽  
Hyperglycemic Hormone ◽  
Water Field ◽  
Benzene Hexachloride ◽  
Hemolymph Sugar

Abstract Hyperglycemia, Oziotelphusa senex senex, Hyperglycemic Hormone, Hexachlorocyclohexane (BHC) Benzene hexachloride (1,2,3,4,5,6-hexachlorocyclohe-xane) (BHC) produced a significant increase in the hemolymph sugar level of intact crabs. Oziotelphusa senex senex, apparantly by triggering release of the hypergly­ cemic hormone (HGH).

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