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Introduction: Various cytokines mediate the inflammatory reaction of the body during surgical interventions. Following invasive abdominal surgery the cytokines Interleukin-1 (IL-1) and Tumor Necrosis Factor-α (TNF-α) are the first that are released from the traumatized tissues. Subsequently, these cytokines stimulate the production of further cytokines and by this means diminishes surgery-induced stress. Alterations in the cytokine pattern after surgery can generally point on possibly arising post-surgical complications. The Heat Shock proteins (Hsp) are useful indicators for cellular stress, since they maintain cellular homeostasis, protect the cells from different stress stimuli and exert influence on the immune system. In case of additional stress, patients who underwent invasive surgery are not able to elicit an adequate Hsp70-response, resulting in a disturbed immune defense and increased infection rate. The present study investigates the cytokine expression and cellular stress response following laparoscopic and laparotomic surgery on cows with abomasal displacement. Methods: Cows admitted to the clinic for cattle diseases with abomasal displacement were included in this study. Surgery was carried out either by omentopexy (Hannover method) or laparoscopy (Janowitz method). Samples of venous blood were drawn from each cow, immediately before and after surgery as well as 2, 4, 6, 24 and 48 hours later, respectively. Different expressions of Hsp70 and selected cytokines (IL-1ß, IL-2, IL-4, IL-6, IL-10, TNF-α) were calculated using Real Time-PCR.
Conclusion: Comparison between laparoscopic and laparotomic techniques showed significant differences in cytokine and Hsp gene-expression, indicating increased cell stress after laparotomy.