Abstract:
BACKGROUND:Obese patients are more prone to post-injury multiple organ failure (MOF). Obesity pathophysiology includes an adipose-tissue-derived, renin-angiotensin-aldosterone system affecting inflammatory responses via leukocyte angiotensin receptors. We hypothesized that obese patients receiving pre-injury angiotensin-converting enzyme inhibitor (ACE) or angiotensin receptor blocker (ARB) therapy would have decreased MOF and differences in immune cell frequencies. STUDY DESIGN:We analyzed the Inflammation and the Host Response to Injury trauma-related database. Patients receiving pre-injury ACE or ARB were stratified as obese (BMI >30 kg/m(2)) or nonobese (BMI <30 kg/m(2)). Groups were age, sex, and Injury Severity Score matched against patients not receiving this therapy. Primary end points were Marshall Multiple Organ Dysfunction Score, Denver-2 Postinjury MOF Score, leukocyte markers on T cells, and monocytes measured by flow cytometry. RESULTS:We evaluated 1,932 patients. One hundred and ten were receiving pre-injury ACE/ARB; 94 patients had data available to calculate BMI. Obese patients receiving ACE/ARB showed maximum Marshall (5.83 ± 2.87) and Denver-2 (2.45 ± 2.32) scores similar to nonobese patients receiving or not receiving ACE/ARB, and obese patients not receiving ACE/ARB had significantly higher Marshall (6.49 ± 2.57; p = 0.009) and Denver-2 (3.33 ± 2.21; p = 0.006) scores. Leukocyte analysis suggested improved T-cell function and monocyte maturation in obese patients on ACE/ARB. CONCLUSIONS:Obese patients receiving preinjury ACE/ARB therapy demonstrate post-injury MOF scores similar to nonobese patients; obese patients not receiving these medications have greater post-injury MOF. Leukocyte analysis demonstrates improved immune regulation. Modulation of the renin-angiotensin-aldosterone system pathway might represent a novel therapeutic target in severely injured obese patients.
journal_name
J Am Coll Surgjournal_title
Journal of the American College of Surgeonsauthors
Winfield RD,Southard RE,Turnbull IR,Bochicchio K,Reese S,Freeman BD,Bochicchio GVdoi
10.1016/j.jamcollsurg.2015.03.051subject
Has Abstractpub_date
2015-08-01 00:00:00pages
486-94.e4issue
2eissn
1072-7515issn
1879-1190pii
S1072-7515(15)00273-2journal_volume
221pub_type
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