Plasma-Mediated Gut Protection After Hemorrhagic Shock is Lessened in Syndecan-1-/- Mice.
We have shown in a rodent model of hemorrhagic shock (HS) that fresh frozen plasma (FFP) reduces lung inflammation and injury that are correlated with restitution of syndecan-1. As the gut is believed to contribute to distant organ injury and inflammation after shock, the current study sought to determine if the protective effects of plasma would extend to the gut and to elucidate the contribution of syndecan-1 to this protective effect. We also examined the potential role of TNFα, and a disintegrin and metalloproteinase (ADAM)-17, both intestinal sheddases of syndecan-1. Wild-type (WT) and syndecan-1 (KO) mice were subjected to HS followed by resuscitation with lactated Ringer's (LR) or FFP and compared with shock alone and shams. Small bowel and blood were obtained after 3  h for analysis of mucosal injury and inflammation and TNFα and ADAM-17 protein expression and activity. After HS, gut injury and inflammation were significantly increased compared with shams. Resuscitation with LR decreased both injury and inflammation that were further lessened by FFP. KO mice displayed worsened gut injury and inflammation after HS compared with WT mice, and LR and FFP equivalently inhibited injury and inflammation. Both systemic and intestinal TNFα and ADAM-17 followed similar trends, with increases after HS, reduction by LR, and a further decrease by FFP in WT but not KO mice. In conclusion, FFP decreased gut injury and inflammation after hemorrhagic shock, an effect that was abrogated in syndecan-1 mice. Plasma also decreased TNFα and ADAM-17, representing a potential mechanistic link to its protection via syndecan-1.
*Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas †Shock Trauma Center, University of Maryland, Baltimore, Maryland ‡Blood Systems Research Institute §Department of Surgery, University of California, San Francisco, California ||University of Texas Health Science Center at Houston, Houston, Texas ¶Division of Respiratory Diseases, Children's Hospital, Harvard Medical School, Boston, Massachusetts.
Kechen
K
Ban
Zhanglong
Z
Peng
Shibani
S
Pati
Richard B
RB
Witkov
Pyong Woo
PW
Park
Rosemary A
RA
Kozar
D051722:ADAM Proteins / Q000378:metabolism; D000072198:ADAM17 Protein; D000818:Animals; D004195:Disease Models, Animal; D004751:Enteritis / Q000209:etiology / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control; D007410:Intestinal Diseases / Q000209:etiology / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control*; D007413:Intestinal Mucosa / Q000378:metabolism / Q000473:pathology; D007421:Intestine, Small / Q000378:metabolism / Q000473:pathology; D008297:Male; D018345:Mice, Knockout; D010949:Plasma; D012771:Shock, Hemorrhagic / Q000150:complications / Q000378:metabolism / Q000628:therapy*; D053668:Syndecan-1 / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
C508242:Sdc1 protein, mouse; D053668:Syndecan-1; D014409:Tumor Necrosis Factor-alpha; D051722:ADAM Proteins; D000072198:ADAM17 Protein; C000606463:Adam17 protein, mouse