Protective Effects of Ulinastatin on Proliferation and Cytokine Release of Splenocytes from Rats with Severe Acute PancreatitisMa T. · Kang C. · Shao H. · Qi Q. · Hu W.
Department of Surgery, General Hospital of the Tianjin Medical University, Tianjin, China
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Article / Publication Details
Aim: To clarify the contributions of ulinastatin to cellular immune responses in vivo, we examined the functional alterations of splenocytes and quantitatively evaluated the effects of ulinastatin on the splenocyte function during experimental severe acute pancreatitis. Methods: Severe acute pancreatitis was induced in rats by retrograde injection of 3% sodium deoxycholate. Thirty minutes after induction of pancreatitis, the rats were randomly assigned to four groups, receiving either saline or 50,000 U/kg of ulinastatin, respectively. Splenocytes were obtained aseptically and stimulated with concanavalin A for 24 h. Then the proliferative activity of cultured splenocytes was measured by using an MTT cellular proliferation assay, and the cytokine concentrations in the culture supernatants were measured by enzyme-linked immunosorbent assays. Results: Upon stimulation, the release of interleukin-2, interleukin-10, and interferon-γ was significantly decreased in the splenocytes from rats with pancreatitis as compared with those from sham operation and control groups. The splenocyte proliferation was also significantly suppressed in this group. In contrast, the proliferative as well as the cytokine-releasing capacities of the splenocytes from rats treated with ulinastatin were significantly increased as compared with those from rats with pancreatitis. Conclusions: The deficiencies in proliferation and cytokine release in response to antigen stimulation demonstrated an anergic state of splenocytes during severe acute pancreatitis. Treatment with ulinastatin contributed to the recovery of the immune function by improving proliferative responses and cytokine release of splenocytes. These data suggest that a protease-modulating therapy may be an effective strategy for the treatment of immunosuppression induced by severe acute pancreatitis.
© 2006 S. Karger AG, Basel
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