Objective To investigate the correlation between orexin A and the serine proteinase inhibitor vaspin in obese rats with insulin resistance(IR)induced by high-fat diet and elaborate the possible action mechanism of orexin involvement in fat metabolism in IR pathological process. Methods A total of 75 4-week-old male Sprague-Dawley rats were randomly divided into the normal dietary group(NC group,n =20)and the high-fat dietary group(HF group,n =55)to establish the model of obese rats with IR,the euglycemic in...