• Asada Leelahavanichkul, Navaporn Worasilchai, Surat Wannalerdsakun, Kamonwon Jutivorakool, Poorichaya Somparn, Jiraphorn Issara-Amphorn, Sasipha Tachaboon, Nattachai Srisawat, Malcolm Finkelman, and Ariya Chindamporn.
• *Department of Microbiology, Chulalongkorn University, Bangkok, Thailand †Division of Nephrology, Chulalongkorn University, Bangkok, Thailand ‡Center of Excellence in Immunology and Immune-Mediated Diseases, Department of Microbiology, Faculty of Medicine and STAR on Craniofacial and Skeletal Disorders, Faculty of Dentistry, Bangkok, Thailand §Division of Infectious Diseases, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand ||Research Affairs, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand ¶Excellent Center for Critical Care Nephrology, King Chulalongkorn Memorial Hospital, Bangkok, Thailand #Associates of Cape Cod, Inc., East Falmouth, Massachusetts.
• Shock. 2016 Nov 1; 46 (5): 506-518.

AbstractGastrointestinal (GI) leakage is believed to exacerbate sepsis and new, validated markers of GI barrier performance might benefit clinical decision-making. Serum (1→3)-β-D-glucan (BG) was evaluated as a potential GI leakage marker. Serum BG was tested in several mouse models of GI leakage, including dextran sulfate solution (DSS) administration, endotoxin (LPS) injection, and cecal ligation and puncture sepsis (CLP). Serum BG titer was also evaluated in patients with sepsis and septic shock, for comparison.With 0.75% DSS administration, BG increased only after oral administration of heat-killed C. albicans, but increased spontaneously with 1.5% DSS. In the LPS and CLP models, BG increased as early as 1 h and at 12 h after LPS administration and surgery, respectively. GI leakage was confirmed by orthogonal validation methods including FITC-dextran oral administration in the DSS, LPS, and CLP models and, in the DSS model, with urine sucralose after oral administration and serum endotoxemia. IL-6 increased in parallel with serum BG. Serum BG or IL-6, at 18 h, anticipated sepsis mortality in the CLP model.Analysis of serum BG from patients with febrile neutropenic sepsis (N = 49) and febrile non-neutropenic sepsis (N = 39) demonstrated BG elevation. Patients with bacterial septic shock had serum BG titers similar to levels observed in invasive fungal disease, regardless of febrile neutropenia. Serum BG was lower in less severe cases of bacterial sepsis. Elevated serum IL-6 was associated with GI leakage and elevated serum BG.Serum BG may have potential as a sepsis/septic shock biomarker and further study in this context is warranted.

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