Serum interleukin-6 concentrations in endotoxin-infused neonatal foals
1993
Robinson, J.A. | Allen, G.K. | Green, E.M. | Garner, H.E. | Loch, W.E. | Walsh, D.M.
Serum interleukin-6 (IL-6) concentration was measured in 11 colostrum-fed (CF) and 8 colostrum. deprived (CD) 2- to 3-day-old foals after foals were infused with lipopolysaccharide LPS; Escherichia coli O55:B5 endotoxin, 0.5 micrograms/kg of body weight in sterile saline [0.9% NaCl] solution. Four CF and 2 CD foals were given saline solution alone. Serum IL-6 concentration was estimated by use of an in vitro proliferative bioassay, using the IL-6 dependent B.13.29 clone 9 cells. Interleukin-6 concentration increased in all LPS-infused foals, and geometric mean serum IL-6 concentration was significantly higher in CF than CD foals 30 and 90 minutes after infusion. Both LPS-infused. groups had multiple spikes of mean IL-6 concentration that peaked at 120 minutes in CF foals and 150 minutes in CD foals. Results indicated that IL-6 is produced in neonatal foals in response to LPS infusion. Furthermore, colostrum deprivation resulted in longer times to peak mean serum IL-6 concentration and tended to reduce serum IL-6 concentration in neonatal foals.
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