The pathogenic role of the components of extracellular matrix as causative factor of diffuse connective diseases and vasculitis has been studied extensively. The pathogenesis of Takayasu´s arteritis is unknown, and many theories have been proposed to explain the etiology of this disease, involving disturbances of the humoral or cellular immune responses. OBJECTIVE: To research antibodies directed to components of the extracellular matrix and aorta extract. METHODS: Serum from thirteen patients with Takayasu´s arteritis and from eight normal patients was tested to show the presence of autoantibodies directed to anti types I, III, IV and V collagen and anti-aorta employing ELISA methodology. RESULTS: Serum from patients with Takayasu´s arteritis didn't show the presence of antibodies directed to types III and IV collagen and only one patient was positive for type I and V collagen. No serum was reactive with aorta extract in patients with Takayasu´s arteritis as well. CONCLUSIONS: Our results didn't show the presence of antibodies directed to types I, III, IV and V collagen, as well as against aorta extract, suggesting that cell immune mediated disturbance should be the mechanism involved in the etiopathogenesis of this form of vasculitis.
Takayasu´s arteritis; collagen; aorta extract; vasculitis