Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine.
The inflammatory response to severe traumatic injury results in significant morbidity and mortality. Lymphocytes have recently been identified as critical mediators of the early innate immune response to ischemia-reperfusion injury. Experimental manipulation of lymphocytes following hemorrhagic shoc...
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doaj-862957ef589e44449a31c286dffead692020-11-25T02:15:41ZengPublic Library of Science (PLoS)PLoS ONE1932-62032012-01-0174e3422410.1371/journal.pone.0034224Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine.Jason S HawksworthJ Christopher GraybillTrevor S BrownShannon M WallaceThomas A DavisDoug K TadakiEric A ElsterThe inflammatory response to severe traumatic injury results in significant morbidity and mortality. Lymphocytes have recently been identified as critical mediators of the early innate immune response to ischemia-reperfusion injury. Experimental manipulation of lymphocytes following hemorrhagic shock may prevent secondary immunologic injury in surgical and trauma patients. The objective of this study is to evaluate the lymphocyte sequestration agent FTY720 as an immunomodulator following experimental hemorrhagic shock in a swine liver injury model. Yorkshire swine were anesthetized and underwent a grade III liver injury with uncontrolled hemorrhage to induce hemorrhagic shock. Experimental groups were treated with a lymphocyte sequestration agent, FTY720, (n = 9) and compared to a vehicle control group (n = 9). Animals were observed over a 3 day survival period after hemorrhage. Circulating total leukocyte and neutrophil counts were measured. Central lymphocytes were evaluated with mesenteric lymph node and spleen immunohistochemistry (IHC) staining for CD3. Lung tissue infiltrating neutrophils were analyzed with myeloperoxidase (MPO) IHC staining. Relevant immune-related gene expression from liver tissue was quantified using RT-PCR. The overall survival was 22.2% in the vehicle control and 66.7% in the FTY720 groups (p = 0.081), and reperfusion survival (period after hemorrhage) was 25% in the vehicle control and 75% in the FTY720 groups (p = 0.047). CD3(+) lymphocytes were significantly increased in mesenteric lymph nodes and spleen in the FTY720 group compared to vehicle control, indicating central lymphocyte sequestration. Lymphocyte disruption significantly decreased circulating and lung tissue infiltrating neutrophils, and decreased expression of liver immune-related gene expression in the FTY720 treated group. There were no observed infectious or wound healing complications. Lymphocyte sequestration with FTY720 improves survival in experimental hemorrhagic shock using a porcine liver injury model. These results support a novel and clinically relevant lymphocyte immunomodulation strategy to ameliorate secondary immune injury in hemorrhagic shock.http://europepmc.org/articles/PMC3340389?pdf=render |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jason S Hawksworth J Christopher Graybill Trevor S Brown Shannon M Wallace Thomas A Davis Doug K Tadaki Eric A Elster |
spellingShingle |
Jason S Hawksworth J Christopher Graybill Trevor S Brown Shannon M Wallace Thomas A Davis Doug K Tadaki Eric A Elster Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine. PLoS ONE |
author_facet |
Jason S Hawksworth J Christopher Graybill Trevor S Brown Shannon M Wallace Thomas A Davis Doug K Tadaki Eric A Elster |
author_sort |
Jason S Hawksworth |
title |
Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine. |
title_short |
Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine. |
title_full |
Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine. |
title_fullStr |
Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine. |
title_full_unstemmed |
Lymphocyte modulation with FTY720 improves hemorrhagic shock survival in swine. |
title_sort |
lymphocyte modulation with fty720 improves hemorrhagic shock survival in swine. |
publisher |
Public Library of Science (PLoS) |
series |
PLoS ONE |
issn |
1932-6203 |
publishDate |
2012-01-01 |
description |
The inflammatory response to severe traumatic injury results in significant morbidity and mortality. Lymphocytes have recently been identified as critical mediators of the early innate immune response to ischemia-reperfusion injury. Experimental manipulation of lymphocytes following hemorrhagic shock may prevent secondary immunologic injury in surgical and trauma patients. The objective of this study is to evaluate the lymphocyte sequestration agent FTY720 as an immunomodulator following experimental hemorrhagic shock in a swine liver injury model. Yorkshire swine were anesthetized and underwent a grade III liver injury with uncontrolled hemorrhage to induce hemorrhagic shock. Experimental groups were treated with a lymphocyte sequestration agent, FTY720, (n = 9) and compared to a vehicle control group (n = 9). Animals were observed over a 3 day survival period after hemorrhage. Circulating total leukocyte and neutrophil counts were measured. Central lymphocytes were evaluated with mesenteric lymph node and spleen immunohistochemistry (IHC) staining for CD3. Lung tissue infiltrating neutrophils were analyzed with myeloperoxidase (MPO) IHC staining. Relevant immune-related gene expression from liver tissue was quantified using RT-PCR. The overall survival was 22.2% in the vehicle control and 66.7% in the FTY720 groups (p = 0.081), and reperfusion survival (period after hemorrhage) was 25% in the vehicle control and 75% in the FTY720 groups (p = 0.047). CD3(+) lymphocytes were significantly increased in mesenteric lymph nodes and spleen in the FTY720 group compared to vehicle control, indicating central lymphocyte sequestration. Lymphocyte disruption significantly decreased circulating and lung tissue infiltrating neutrophils, and decreased expression of liver immune-related gene expression in the FTY720 treated group. There were no observed infectious or wound healing complications. Lymphocyte sequestration with FTY720 improves survival in experimental hemorrhagic shock using a porcine liver injury model. These results support a novel and clinically relevant lymphocyte immunomodulation strategy to ameliorate secondary immune injury in hemorrhagic shock. |
url |
http://europepmc.org/articles/PMC3340389?pdf=render |
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