Dietary Sucrose Suppresses Midgut Sucrase Activity in Germfree, Fifth Instar Larvae of the Silkworm, <i>Bombyx mori</i>

DOI Web Site 2 Citations 28 References

Bibliographic Information

Other Title
  • Dietary sucrose suppresses midgut sucrase activity in germfree, fifth instar larvae of the silkworm, Bombyx mori

Search this article

Abstract

Effect of dietary sucrose on midgut sucrase activity in the 5th instar B. mori larvae was investigated in germfree conditions from day 1, the 5th instar until day 8, the 5th instar, i.e., the day of onset of spinning. Sucrase activity per midgut was suppressed throughout the development in a dose-dependent manner, by sucrose from 1.4% up to 6.9% in wet weight basis. Sucrase specific activity showed a similar profile. The results implicate that dietary sucrose functions as an effector molecule to midgut cells in the 5th instar B. mori larvae and as an output response, produces suppressed sucrase protein. When aminopeptidase activity was measured using the same midgut preparations, there were no effects of dietary sucrose. Within 24h after 4th ecdysis, a slightly different pattern was observed; the highest activity was observed with 3% sucrose diet and it was higher than the control, indicating apparent activation. This may be due to inherent physiological conditions of midgut cells in early fifth instar larvae.<br>

Journal

Citations (2)*help

See more

References(28)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top