TY - JOUR
T1 - Amplification of the proinflammatory transcription factor cascade increases with severity of uncontrolled hemorrhage in swine
AU - Brundage, Susan I.
AU - Schreiber, Martin A.
AU - Holcomb, John B.
AU - Zautke, Nathan
AU - Mastrangelo, Mary Ann
AU - Xq, Xu
AU - Macaitis, Joe
AU - Tweardy, David J.
N1 - Funding Information:
Supported by National Institutes of Health Grant K12 HD01426-01/05 and The American Association for the Surgery of Trauma Research and Education Foundation Scholarship Award.
PY - 2003/7
Y1 - 2003/7
N2 - Introduction. Hypotension causes diffuse liver injury accompanied by increased local production of interleukin-6 (IL-6) in swine models of uncontrolled hemorrhagic shock (HS). IL-6 is transcriptionally up-regulated by nuclear factor (NF)-κB and results in activation of signal transducer and activator of transcription-3 (Stat3) in a murine model of controlled HS. Our objectives were: 1) to determine if increased IL-6 production and NF-κB and Stat3 activation occurs in a swine model of uncontrolled HS, and 2) to assess whether or not levels of IL-6 mRNA and activity of NF-κB and Stat3 correlate with shock severity. Materials and methods. Swine were assigned to four groups: 1) control animals (n = 6): no intervention, 2) sham operation (n = 6): celiotomy and splenectomy, 3) uncontrolled hemorrhagic shock (UHS) (n = 6): sham plus grade V vascular liver injury and resuscitation, 4) profound uncontrolled hemorrhagic shock (PUHS) (n = 8): UHS after dilutional hypothermia. Following euthanasia at 2 h, livers were harvested, total RNA isolated, and IL-6 mRNA levels quantified by Q-RT-PCR (ABI Prism 7700, Applied Biosystems International, Foster City, CA). Protein was extracted for measurement of NF-κB and Stat3 activity by electrophoretic mobility shift assay (EMSA). Results. Compared to shams, IL-6 mRNA levels increased 4.5-fold in UHS and 90-fold in PUHS (P < 0.001). Compared with shams; NF-κB activity increased 2-fold in both UHS and PUHS (P < 0.05). Stat3 activity was equivalent (not significant) in UHS when compared with shams but increased 5.3-fold in PUHS. (P < 0.05). Conclusion. These findings suggest that regional proinflammatory cytokine production results from and perpetuates a proinflammatory transcription factor cascade in a swine model of uncontrolled hemorrhagic shock and indicate that this process is proportional to the severity of shock.
AB - Introduction. Hypotension causes diffuse liver injury accompanied by increased local production of interleukin-6 (IL-6) in swine models of uncontrolled hemorrhagic shock (HS). IL-6 is transcriptionally up-regulated by nuclear factor (NF)-κB and results in activation of signal transducer and activator of transcription-3 (Stat3) in a murine model of controlled HS. Our objectives were: 1) to determine if increased IL-6 production and NF-κB and Stat3 activation occurs in a swine model of uncontrolled HS, and 2) to assess whether or not levels of IL-6 mRNA and activity of NF-κB and Stat3 correlate with shock severity. Materials and methods. Swine were assigned to four groups: 1) control animals (n = 6): no intervention, 2) sham operation (n = 6): celiotomy and splenectomy, 3) uncontrolled hemorrhagic shock (UHS) (n = 6): sham plus grade V vascular liver injury and resuscitation, 4) profound uncontrolled hemorrhagic shock (PUHS) (n = 8): UHS after dilutional hypothermia. Following euthanasia at 2 h, livers were harvested, total RNA isolated, and IL-6 mRNA levels quantified by Q-RT-PCR (ABI Prism 7700, Applied Biosystems International, Foster City, CA). Protein was extracted for measurement of NF-κB and Stat3 activity by electrophoretic mobility shift assay (EMSA). Results. Compared to shams, IL-6 mRNA levels increased 4.5-fold in UHS and 90-fold in PUHS (P < 0.001). Compared with shams; NF-κB activity increased 2-fold in both UHS and PUHS (P < 0.05). Stat3 activity was equivalent (not significant) in UHS when compared with shams but increased 5.3-fold in PUHS. (P < 0.05). Conclusion. These findings suggest that regional proinflammatory cytokine production results from and perpetuates a proinflammatory transcription factor cascade in a swine model of uncontrolled hemorrhagic shock and indicate that this process is proportional to the severity of shock.
KW - Hemorrhage
KW - Inflammatory cascade
KW - Interleukin-6
KW - Nuclear factor-κB
KW - Proinflammatory cytokines
KW - Shock, ischemia/reperfusion injury
KW - Signal transducer and activator of transcription-3 (Stat3)
KW - Signal transduction
KW - Transcription factors
KW - Trauma
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U2 - 10.1016/S0022-4804(03)00129-X
DO - 10.1016/S0022-4804(03)00129-X
M3 - Article
C2 - 12943813
AN - SCOPUS:0042736093
SN - 0022-4804
VL - 113
SP - 74
EP - 80
JO - Journal of Surgical Research
JF - Journal of Surgical Research
IS - 1
ER -