Increased calcium deposits and decreased Ca(2+)-ATPase in erythrocytes of ascitic broiler chickens.
Summary of "Increased calcium deposits and decreased Ca(2+)-ATPase in erythrocytes of ascitic broiler chickens."
The decrease of erythrocyte deformability may be one of the predisposing factors for pulmonary hypertension and ascites in broiler chickens. In mammals, the cytoplasmic calcium is a major regulator of erythrocyte deformability. In this study, the erythrocyte deformability was measured, and the precise locations of Ca(2+) and Ca(2+)-ATPase in the erythrocytes were investigated in chickens with ascites syndrome induced by low ambient temperature. The results showed that ascitic broilers had higher filtration index of erythrocyte compared with control groups, indicating a decrease in erythrocyte deformability in ascitic broilers. The more calcium deposits were observed in the erythrocytes of ascitic broilers compared with those of the age-matched control birds. The Ca(2+)-ATPase reactive grains were significantly decreased on the erythrocyte membranes of ascitic broilers. Our data suggest that accumulation of intracellular calcium and inhibition of Ca(2+)-ATPase might be important factors for the reduced deformability of the erythrocytes of ascitic broilers.
Affiliation
Department of Animal Physiopathology, College of Veterinary Medicine, China Agricultural University, Beijing 100193, PR China; Department of Veterinary Medicine, College of Animal Science, Hebei North University, Hebei Province 075000, PR China.
Journal Details
This article was published in the following journal.
Name: Research in veterinary science
ISSN: 1532-2661
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20728193
- DOI: http://dx.doi.org/10.1016/j.rvsc.2010.07.002
Medical and Biotech [MESH] Definitions
Ryanodine
A methylpyrrole-carboxylate from RYANIA that disrupts the RYANODINE RECEPTOR CALCIUM RELEASE CHANNEL to modify CALCIUM release from SARCOPLASMIC RETICULUM resulting in alteration of MUSCLE CONTRACTION. It was previously used in INSECTICIDES. It is used experimentally in conjunction with THAPSIGARGIN and other inhibitors of CALCIUM ATPASE uptake of calcium into SARCOPLASMIC RETICULUM.
Intracranial Arteriosclerosis
Vascular diseases characterized by thickening and hardening of the walls of ARTERIES inside the SKULL. There are three subtypes: (1) atherosclerosis with fatty deposits in the ARTERIAL INTIMA; (2) Monckeberg's sclerosis with calcium deposits in the media and (3) arteriolosclerosis involving the small caliber arteries. Clinical signs include HEADACHE; CONFUSION; transient blindness (AMAUROSIS FUGAX); speech impairment; and HEMIPARESIS.
Intermediate-conductance Calcium-activated Potassium Channels
A major class of calcium-activated potassium channels that were originally discovered in ERYTHROCYTES. They are found primarily in non-excitable CELLS and set up electrical gradients for PASSIVE ION TRANSPORT.
Thapsigargin
A sesquiterpene lactone found in roots of THAPSIA. It inhibits CA(2+)-TRANSPORTING ATPASE mediated uptake of CALCIUM into SARCOPLASMIC RETICULUM.
Ca(2+) Mg(2+)-atpase
An enzyme that catalyzes the hydrolysis of ATP and is activated by millimolar concentrations of either Ca(2+) or Mg(2+). Unlike CA(2+)-TRANSPORTING ATPASE it does not require the second divalent cation for its activity, and is not sensitive to orthovanadate. (Prog Biophys Mol Biol 1988;52(1):1). A subgroup of EC 3.6.1.3.
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