Soluble CD40 ligand in morbidly obese patients: effect of body mass index on recovery to normal levels after gastric bypass surgery.

Abstract:

IMPORTANCE:In recent years, the CD40/CD40L system has been implicated in the pathophysiology of severe chronic inflammatory diseases. Recently, obesity has been described as a low chronic inflammatory disease, so this system could also be involved in the inflammatory process. OBJECTIVE:To study soluble CD40 ligand (sCD40L) and other factors implicated in coagulation (plasminogen activator inhibitor 1, antithrombin III, and fibrinogen) and inflammation (C-reactive protein) in patients with morbid obesity and different body mass indexes (BMIs) (calculated as weight in kilograms divided by height in meters squared), before and after weight loss induced by bariatric surgery. DESIGN:Plasma samples were obtained before and after a bariatric surgery intervention. Several inflammatory markers were then studied (sCD40L, plasminogen activator inhibitor 1, antithrombin III, and C-reactive protein). The values obtained were compared with a control group of nonobese persons. PARTICIPANTS:Thirty-four morbidly obese patients undergoing gastric bypass surgery and 22 normal-weight controls matched for age and sex. INTERVENTIONS:A Roux-en-Y gastric bypass was performed in morbidly obese patients. MAIN OUTCOME MEASURES:Levels of sCD40L, plasminogen activator inhibitor 1, antithrombin III, fibrinogen, and C-reactive protein 12 months after bariatric surgery. RESULTS:Obese men showed a tendency for decreased plasma sCD40L levels 1 year after surgery (mean [SEM], 246.5 [70.4] pg/mL before vs 82.2 [23.2] pg/mL after surgery; P < .05), whereas there were not any significant changes in obese women (285.9 [67.5] pg/mL before vs 287.0 [56.9] pg/mL after surgery). Levels of the other markers studied decreased significantly with weight loss in both sexes. However, all other studied markers tend to have higher concentrations in patients with higher BMIs, except for sCD40L, which tended to have lower concentrations in patients with BMIs higher than 55. The decreases with weight loss were lower with higher BMIs for all measurements, except for antithrombin III. CONCLUSIONS AND RELEVANCE:Increased BMI, but not sex, influences recovery to normal levels for the markers studied, possibly indicating a worse prognosis.

journal_name

JAMA Surg

journal_title

JAMA surgery

authors

Baena-Fustegueras JA,Pardina E,Balada E,Ferrer R,Catalán R,Rivero J,Casals I,Lecube A,Fort JM,Vargas V,Peinado-Onsurbe J

doi

10.1001/jamasurgery.2013.419

subject

Has Abstract

pub_date

2013-02-01 00:00:00

pages

151-6

issue

2

eissn

2168-6254

issn

2168-6262

pii

1654851

journal_volume

148

pub_type

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