PMID: 12770296May 29, 2003Paper

Effects of inhibitors and specific ion-free salines on segmental fluid secretion by the Malpighian tubules of the black field cricket Teleogryllus oceanicus

Journal of Insect Physiology
W Xu, Alan T Marshall

Abstract

The effects of inhibitors and specific ion-free salines on fluid secretion rates in the distal and main segments showed that there were major differences in secretory mechanisms in the two segments. Both main and distal segments of the Malpighian tubules were sensitive to DIDs, SITS and acetazolamide but in different ways. The evidence suggests that the main segment does not contain a Cl(-)/HCO(3)(-) exchanger in the basal membrane, whereas the distal segment may do so. Secretion in both segments was K(+) dependent. Ba(2+) markedly reduced fluid secretion by the main segment and K(+) entry into the cells of the main segment is suggested to be predominantly via K(+) channels. Entry of K(+) may be primarily by other routes, such as Na K ATPase, in the distal segment. In the distal segment secretion was highly Mg(2+) dependent. Both segments were sensitive to amiloride analogs suggesting the presence of apical cation/H(+) exchangers.

References

May 13, 1976·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J A Ramsay
Apr 1, 1992·The American Journal of Physiology·Z I Cabantchik, R Greger
Sep 1, 1991·The American Journal of Physiology·J L HegartyK W Beyenbach
Oct 1, 1988·The Journal of Membrane Biology·T R Kleyman, E J Cragoe
Jan 1, 1985·The Journal of Membrane Biology·D F Moffett, A R Koch
Nov 1, 1969·The American Journal of Physiology·H B Irvine
Sep 1, 1994·Pflügers Archiv : European journal of physiology·S DijkstraR Greger
May 13, 1997·Proceedings of the National Academy of Sciences of the United States of America·M A SözenJ A Dow

❮ Previous
Next ❯

Citations

Jan 1, 2010·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Peter M PiermariniKlaus W Beyenbach
Sep 25, 2003·The Journal of Experimental Biology·Klaus W Beyenbach
Sep 1, 2009·The Journal of Experimental Biology·Alan T Marshall, Peta L Clode

❮ Previous
Next ❯

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.