The Importance of Testing Anti‐IL‐17 Antibodies From Different Suppliers

With great interest, we have read the study by Loverre et al. The authors show by means of immunostaining that numerous IL-17+CD4+ cells are present in renal biopsies during T-cell-mediated rejection (TCMR) and demonstrate that tubular epithelial cells (TECs) represent a significant source for IL-17 in antibody-mediated rejection (ABMR; Ref. 1). We have some concerns regarding the specificity of the immunostaining.