| First Author | Helwig BG | Year | 2011 |
| Journal | Physiol Genomics | Volume | 43 |
| Issue | 19 | Pages | 1096-104 |
| PubMed ID | 21828249 | Mgi Jnum | J:177742 |
| Mgi Id | MGI:5295918 | Doi | 10.1152/physiolgenomics.00076.2011 |
| Citation | Helwig BG, et al. (2011) Tissue and circulating expression of IL-1 family members following heat stroke. Physiol Genomics 43(19):1096-104 |
| abstractText | Interleukin-1 (IL-1) is thought to have a significant role in the pathophysiology of heat stroke (HS), although little is known regarding the actions or expression patterns of the IL-1 family. This study tested the hypotheses that following HS IL-1 family gene expression is dynamic, while loss of IL-1 signaling enhances recovery. IL-1 family expression was determined in plasma, spleen, and liver from C57BL/6J mice (n=24 control, n=20 HS) at maximum core temperature (Tc,Max), hypothermia, and 24 h post-HS (24 h). Soluble IL-1 receptor subtype I (sIL-1RI) protein expression peaked at 24 h (14,659.01+/-2,016.28 pg/ml, P<0.05), while sIL-1RII peaked at hypothermia (19,099.30+/-1,177.07 pg/ml). IL-1alpha gene expression in the spleen (ninefold) and liver (fourfold) along with IL-1RI (threefold spleen and fivefold liver) were maximal at hypothermia. Spleen IL-1beta gene expression peaked at Tc,Max (fourfold) but at hypothermia (fourfold) in liver. Gene expression of the IL-1 family member IL-18 peaked (2.5-fold) at Tc,Max but was similar at all other time points. Subsequent studies revealed that despite accruing a greater heating area (298+/-16 vs. 247+/-13 degrees C.min, P<0.05), IL-1RI knockout (KO) mice (n=14) showed an attenuated hypothermia depth (28.5+/-0.2 vs. 27.3+/-0.5 degrees C, P<0.05) and duration (675+/-82 vs. 1,283+/-390 min, P<0.05) with a higher 24 h Tc (36.9 vs. 34.1 degrees C, P<0.05) compared with C57BL/6J mice (n=8). The current results demonstrate that following HS IL-1 family gene expression is altered and IL-1RI KO mice display Tc responses consistent with a more rapid recovery. |
