The investigators will obtain the residual renal tissues with different etiologies and check the expression of LTBP4. The location and quantitation of LTBP4 in renal tissues will be checked. It will be great to understand the association between the severity of fibrosis and the expression of LTBP4 and other matrix proteins.
This project is to understand the LTBP4 expression in human renal fibrotic tissues. The investigators will exam major location of LTBP4 expression and check any similar or discrepancy in renal fibrosis with different etiologies.