Regulation of bovine acute phase responses by recombinant interleukin-1 beta.
The acute phase response is a collection of physiologic changes initiated early in the inflammatory process. This response is comprised of both localized changes at the site of infection or injury and the initiation of systemic responses, such as the increase in production of acute phase proteins. Cytokines such as interleukin (IL)-1, IL-6, and tumor necrosis factor (TNF) play key roles in the regulation of acute phase response in the species studied to date. To better characterize the acute phase response of cattle, recombinant bovine (rBo). IL-1 beta was administered to cattle. A single administration of rBoIL-1 beta was able to induce a dose dependent increase in body temperature, circulating leukocytes, and serum haptoglobin and fibrinogen concentrations, as well as a decrease in plasma zinc concentration. Five daily administrations of rBoIL-1 beta resulted in heightened and prolonged elevations of haptoglobin and fibrinogen. In addition, alpha 1-acid glycoprotein levels were increased, a response not seen after a single administration of rBoIL-1 beta. These results indicate that IL-1 is an important regulator of the acute phase response in cattle.
Veterinary Infectious Disease Organization, University of Saskatchewan, Saskatoon.
D L
DL
Godson
M E
ME
Baca-Estrada
A G
AG
Van Kessel
H P
HP
Hughes
M A
MA
Morsy
J
J
Van Donkersgoed
R J
RJ
Harland
D E
DE
Shuster
M J
MJ
Daley
L A
LA
Babiuk
D000210:Acute-Phase Reaction / Q000097:blood / Q000139:chemically induced* / Q000150:complications; D000818:Animals; D001831:Body Temperature / Q000187:drug effects; D002417:Cattle / Q000502:physiology*; D005340:Fibrinogen / Q000032:analysis / Q000187:drug effects; D006242:Haptoglobins / Q000032:analysis / Q000187:drug effects; D007375:Interleukin-1 / Q000008:administration & dosage*; D007958:Leukocyte Count / Q000187:drug effects; D011994:Recombinant Proteins / Q000008:administration & dosage; D013997:Time Factors
D006242:Haptoglobins; D007375:Interleukin-1; D011994:Recombinant Proteins; D005340:Fibrinogen