Haptoglobin Reduces Inflammatory Cytokine INF-γ and Facilitates Clot Formation in Acute Severe Burn Rat Model

Journal of Nippon Medical School = Nippon Ika Daigaku Zasshi
Hiroyuki KoamiSatoshi Inoue

Abstract

Haptoglobin exerts renal protective function by scavenging free hemoglobin from the urine and blood stream in patients with hemolytic disorders. Recent studies elucidate the relationships between haptoglobin and inflammation. In addition, coagulopathy is often induced by systemic inflammation characterized by the presence of vascular endothelial damage. We hypothesize that haptoglobin might have an anti-inflammatory effect and affect hypercoagulability using rat burn model. Thirty anesthetized rats of six-weeks of age received over 30% full-thickness scald burn on the dorsal skin surface. All rats were injected with either haptoglobin (Hpt) or normal saline (NS) intraperitoneally. The rats were divided into three groups: 1) control group (NS 20 mL/kg); 2) low concentration of Hpt group, L-Hpt, (Hpt 4 mL (80 U) /kg+NS 16 mL/kg); and 3) high concentration of Hpt group, H-Hpt, (Hpt 20 mL (400 U) /kg). While under anesthesia, all rats were euthanized by exsanguination at 6 hours (N=5) and 24 hours (N=5). Inflammatory and anti-inflammatory cytokines were measured and whole-blood viscoelastic tests were performed by thromboelastometry (ROTEM). Haptoglobin significantly reduced free hemoglobin 24 hours after the injury. Improvement of...Continue Reading

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Citations

May 1, 2020·Journal of Nippon Medical School = Nippon Ika Daigaku Zasshi·Toru MiikeSatoshi Inoue
Dec 12, 2019·Acta Cirúrgica Brasileira·Taís Amadio MenegatLydia Masako Ferreira

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