| Steroidal regulation of hydrolyzing activity of the dietary carbohydrates in the silkworm, Bombyx mori. | |
| | |
MedLine Citation:
|
PMID: 21708163 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Blood sugar is an essential energy source for growth and development and is maintained at a constant level through precise regulation of formation and utilization. Sugars are produced from dietary carbohydrates by enzymatic hydrolysis in the digestive tract, which are under the homeostatic control of paracrine and prandial mechanisms in mammals. Here, we show that dietary carbohydrates hydrolyzing activity of the digestive tract is developmentally regulated by the steroid hormone ecdysone in the silkworm, Bombyx mori. The dietary carbohydrates hydrolyzing activity remained high throughout the last larval period and then decreased to negligible levels until the pupal period. However, dietary carbohydrates digestive activities were constitutively high when the steroidogenic organ, prothoracic glands were ablated. The prothoracic glands produced and released a large amount of ecdysone at the end of the larval period, suggesting that ecdysone is responsible for the decrease in dietary carbohydrates hydrolyzing activity. In fact, ecdysone decreased the activity to negligible levels in silkworms lacking the prothoracic glands. The present results indicate that the dietary carbohydrates hydrolyzing activity is regulated by ecdysone and that an increase in ecdysone titer decreases that activity at the end of the larval period, suggesting that ecdysone is essential for metabolic coordination during development. |
| | |
Authors:
|
Takumi Suzuki; Sho Sakurai; Masafumi Iwami |
Related Documents
:
|
16936363 - Effect of counseling on nutritional status during pregnancy. 1102573 - Variability in mineral and trace element content of dairy cattle feeds. 8451803 - Yield of embryos in pmsg-superovulated cows treated with anti-pmsg six or 18 hours afte... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-6-14 |
Journal Detail:
|
Title: Journal of insect physiology Volume: - ISSN: 1879-1611 ISO Abbreviation: - Publication Date: 2011 Jun |
Date Detail:
|
Created Date: 2011-6-28 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 2985080R Medline TA: J Insect Physiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011. Published by Elsevier Ltd. |
Affiliation:
|
Division of Life Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Turn the temperature to turquoise: Cues for colour change in the male chameleon grasshopper (Koscius...
Next Document: Subterranean termite prophylactic secretions and external antifungal defenses.