Clinical significance of a positive flow crossmatch on the outcomes of cadaveric renal transplants.
Pretransplantation crossmatching is an integral part of kidney transplantation. Flow cytometric crossmatch (FCXM) is more sensitive than complement-dependent cytotoxic crossmatch (CDC-XM). However, the clinical significance of positive FCXM with negative CDC-XM is controversial. We evaluated FCXM in 455 consecutive deceased donor renal transplants. All had a negative CDC-XM. There were 341 T-cell and B-cell FCXM negative and 38 T-cell and B-cell positive. There was a higher percentage of retransplantations and HLA mismatches (26.3% vs 8.2%, P= .002 and 2.45 vs 1.99, P= .02, respectively) in the FCXM-positive group compared with the FCXM-negative group; 65.8% of the FCXM-positive patients had rejection compared with 49.3% of the FCXM-negative patients (odds ratio [OR]=1.89, P= .06). FCXM-positive patients had a higher incidence of vascular rejection (28.9% vs 12.6%, OR=2.68, P= .008). One- and 5-year graft survivals were 84% and 66% in the FCXM-positive group vs 90% and 75% in the FCXM-negative group. Censoring for patient death, 1- and 5-year graft survivals were 84% and 73% in the FCXM-positive group vs 94% and 82% in the FCXM-negative group. There was no difference in renal function between the 2 groups. In conclusion, a positive T-cell and B-cell FCXM transplant with a negative CDC-XM is associated with a higher incidence of rejection, twice the risk of vascular rejection, and a trend toward poorer graft survival.
Ilham
M A
MA
Transplant Unit, University Hospital of Wales, Cardiff, Wales, United Kingdom. adel.ilham@cardiffandvale.wales.nhs.uk
Winkler
S
S
Coates
E
E
Rizzello
A
A
Rees
T J
TJ
Asderakis
A
A
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002102:Cadaver; D002648:Child; D002675:Child, Preschool; D004359:Drug Therapy, Combination; D005260:Female; D005434:Flow Cytometry / Q000379:methods; D006680:HLA Antigens / Q000276:immunology; D006650:Histocompatibility Testing / Q000379:methods*; D006801:Humans; D007136:Immunoglobulins / Q000276:immunology; D007165:Immunosuppression Therapy / Q000379:methods; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D016030:Kidney Transplantation / Q000276:immunology*; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D008875:Middle Aged; D012086:Reoperation / Q000706:statistics & numerical data; D012680:Sensitivity and Specificity; D014019:Tissue Donors; D016896:Treatment Outcome
D006680:HLA Antigens; D007136:Immunoglobulins; D007166:Immunosuppressive Agents