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Inflammatory cytokine and chemokine expression is associated with heterotopic ossification in high-energy penetrating war injuries.

Abstract：

OBJECTIVE:Heterotopic ossification (HO) develops frequently after modern high-energy penetrating war injuries. The purpose of this prospective study was to identify and characterize the unique cytokine and chemokine profile associated with the development of HO as it pertained to the systemic inflammatory response after penetrating combat-related trauma. METHODS:Patients with high-energy penetrating extremity wounds were prospectively enrolled. Surgical debridement along with the use of a pulse lavage and vacuum-assisted-closure device was performed every 48-72 hours until definitive wound closure. Wound bed tissue biopsy, wound effluent, and serum were collected before each debridement. Effluent and serum were analyzed for 22 relevant cytokines and chemokines. Tissue was analyzed quantitatively for bacterial colonization. Correlations between specific wound and patient characteristics were also analyzed. The primary clinical outcome measure was the formation of HO as confirmed by radiographs at a minimum of 2 months of follow-up. RESULTS:Thirty-six penetrating extremity war wounds in 24 patients were investigated. The observed rate of HO in the study population was 38%. Of the 36 wounds, 13 (36%) demonstrated HO at a minimum follow-up of 2 months. An elevated injury severity score was associated with the development of HO (P = 0.006). Wound characteristics that correlated with the development of HO included impaired healing (P = 0.005) and bacterial colonization (P < 0.001). Both serum (interleukin-6, interleukin-10, and MCP-1) and wound effluent (IP-10 and MIP-1α) cytokine and chemokine bioprofiles were individually associated and suggestive of the development of HO (P < 0.05). CONCLUSIONS:A severe systemic and wound-specific inflammatory state as evident by elevated levels of inflammatory cytokines, elevated injury severity score, and bacterial wound colonization is associated with the development of HO. These findings suggest that the development of HO in traumatic combat-related wounds is associated with a hyper-inflammatory systemic response to injury. LEVEL OF EVIDENCE:Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence.

journal_name

J Orthop Trauma

journal_title

Journal of orthopaedic trauma

authors

Evans KN,Forsberg JA,Potter BK,Hawksworth JS,Brown TS,Andersen R,Dunne JR,Tadaki D,Elster EA

doi

10.1097/BOT.0b013e31825d60a5

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

e204-13

issue

eissn

0890-5339

issn

1531-2291

journal_volume

pub_type

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Inflammatory cytokine and chemokine expression is associated with heterotopic ossification in high-energy penetrating war injuries.