title: Monoclonal analysis of fine-needle aspiration biopsy in kidney allografts.
abstract: To evaluate changes in T-lymphocyte subsets and DR expression on tubular cells, 74 fine-needle allograft aspirates (FNAB) were evaluated in 31 patients with cadaver kidney transplants. Monoclonal antibodies against T helper CD4+, cytotoxic/suppressor CD8+, and HLA-DR were used with an indirect alkaline-phosphatase-staining technique. Cases with acute rejection (n = 11) showed a significant increase of CD8+: CD4+ ratio versus those with stable function (n = 21), acute tubular necrosis (n = 10) or CsA toxicity (n = 7) (ANOVA F = 10; P less than 0.01). Cases with chronic rejection or CMV infection showed no differences in the CD8+: CD4+ ratio with the other groups. DR expression on tubular cells was frequently found in cases of acute rejection, chronic rejection and CMV (73%, 66%, and 43% respectively), occasionally found in CsA toxicity (14%), but never seen in controls or ATN. Both tests, the CD8+: CD4+ ratio and the DR expression on tubular cells, had a high sensitivity and specificity in differentiating acute rejection versus controls, acute tubular necrosis, and CsA toxicity. When both tests are taken together no case without rejection showed a CD8+:CD4+ ratio greater than 1.6 and DR expression on tubular cells. Cases with acute rejection who lost the graft (n = 6) had a CD8+:CD4+ ratio significantly greater than those who responded to antirejection therapy (n = 5) (t = 2.9; P less than 0.05).
authors.affiliation: Servicio de Nefrologia, Hospital Universitario de Canarias, Tenerife, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Gonzalez-Posada
authors.forename: C
authors.initials: C
authors.lastname: Garcia Castro
authors.forename: M
authors.initials: M
authors.lastname: Losada
authors.forename: V
authors.initials: V
authors.lastname: Lorenzo
authors.forename: A
authors.initials: A
authors.lastname: Torres
authors.forename: D
authors.initials: D
authors.lastname: Hernandez
authors.forename: B
authors.initials: B
authors.lastname: Maceira
authors.forename: E
authors.initials: E
authors.lastname: Salido
mesh_terms: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D001707:Biopsy, Needle; D003937:Diagnosis, Differential; D005260:Female; D006084:Graft Rejection; D006684:HLA-DR Antigens / Q000032:analysis; D006801:Humans; D007150:Immunohistochemistry; D016030:Kidney Transplantation; D008297:Male; D014184:Transplantation, Homologous
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D006684:HLA-DR Antigens