Table 2.

Studies assessing the role of KIR-ligand mismatch in cord blood transplantation

ReferenceWillemze 200928 Brunstein 200994 Tanaka 201392 Garfall 201391 Rocha 201693 Sekine 201697 
No. of patients 218 155 102 357 AML) 80 199 204 
Conditioning (%) MA (83) MA (100) RIC (100) MA (62) MA (27) MA (100) MA (72) 
ATG/ALG (%) 82 40 28 100 70 100 
Single-CBT (%) 100 61 100 100 — 
KIR-ligand mismatched (GvH direction) (%) 32 26 32 81 44 43 HLA C1/x patients who receive CB unit with HLA-C1-KIR2DL2, KIR2DL3, or KIR2DS2 vs all other 
aGVHD (2-4) NS NS Higher in KIR-ligand mismatch NS NS NS NS 
Risk   79% vs 57%     
95% CI   59%-99% vs 44%-70%     
P   .01     
TRM NS NS Higher in KIR-ligand mismatch NS — NS NS 
Risk   27% vs 12% at 2
years 
    
95% CI   12%-42% vs 5%-19%     
P   .03     
Relapse Lower in KIR-ligand mismatch NS NS NS NS NS Lower in HLA-C1/x recipients who received an HLA-C1-KIR2DL2, KIR2DL3, or KIR2DS2 CB unit 
Risk RR, 0.53      HR, 0.04 
95% CI 0.28-0.99      1.57-31.47 
P .05      .002 
OS Higher in KIR-ligand mismatch NS Lower in KIR-ligand mismatch NS NS NS Higher in HLA-C1/x recipients who received an HLA-C1-KIR2DL2, KIR2DL3, or KIR2DS2 CB unit 
Risk RR, 2  32% vs 52% at 3 years    HR, 3.46 
95% CI 1.24-3.22  15%-59% vs 47%-67%    1.46-8.20 
P .004  .03    .005 
ReferenceWillemze 200928 Brunstein 200994 Tanaka 201392 Garfall 201391 Rocha 201693 Sekine 201697 
No. of patients 218 155 102 357 AML) 80 199 204 
Conditioning (%) MA (83) MA (100) RIC (100) MA (62) MA (27) MA (100) MA (72) 
ATG/ALG (%) 82 40 28 100 70 100 
Single-CBT (%) 100 61 100 100 — 
KIR-ligand mismatched (GvH direction) (%) 32 26 32 81 44 43 HLA C1/x patients who receive CB unit with HLA-C1-KIR2DL2, KIR2DL3, or KIR2DS2 vs all other 
aGVHD (2-4) NS NS Higher in KIR-ligand mismatch NS NS NS NS 
Risk   79% vs 57%     
95% CI   59%-99% vs 44%-70%     
P   .01     
TRM NS NS Higher in KIR-ligand mismatch NS — NS NS 
Risk   27% vs 12% at 2
years 
    
95% CI   12%-42% vs 5%-19%     
P   .03     
Relapse Lower in KIR-ligand mismatch NS NS NS NS NS Lower in HLA-C1/x recipients who received an HLA-C1-KIR2DL2, KIR2DL3, or KIR2DS2 CB unit 
Risk RR, 0.53      HR, 0.04 
95% CI 0.28-0.99      1.57-31.47 
P .05      .002 
OS Higher in KIR-ligand mismatch NS Lower in KIR-ligand mismatch NS NS NS Higher in HLA-C1/x recipients who received an HLA-C1-KIR2DL2, KIR2DL3, or KIR2DS2 CB unit 
Risk RR, 2  32% vs 52% at 3 years    HR, 3.46 
95% CI 1.24-3.22  15%-59% vs 47%-67%    1.46-8.20 
P .004  .03    .005 

ALG, anti-lymphocyte globulin; CB, cord blood; MA, myeloablative; RIC, reduced-intensity conditioning; TRM, treatment-related mortality.

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