A New Trial to Measure ABO Antibodies Using Complement-Dependent Cytotoxicity.
Medicina (Kaunas)
; 58(6)2022 Jun 20.
Article
en En
| MEDLINE
| ID: mdl-35744093
ABSTRACT
Background and objectives:
The ABO antibody (Ab) titration tests are used in monitoring in ABO-incompatible (ABOi) solid organ transplantation (SOT). However, currently developed ABO Ab tests show Ab binding reactions. This study attempted to measure ABO Ab level using complement-dependent cytotoxicity (CDC). Materials andmethods:
We studied 93 blood group O serum samples from patients who underwent ABOi SOT from January 2019 to May 2021. Patients' sera were incubated with A1 or B cells and added to a human complement solution. Supernatants were collected after centrifugation, and free hemoglobin (Hb) was measured by spectrophotometry. We converted plasma Hb value to hemolysis (%), which were compared with ABO Ab titer.Results:
We found a mild correlation between hemolysis and ABO Ab titers. In simple regression analysis, the correlation coefficients were within 0.3660−0.4968 (p < 0.0001) before transplantation. In multiple linear regression analysis, anti-A hemolysis (%) was higher in immunoglobulin M (IgM) (ß = 12.9) than in immunoglobulin G (IgG) (ß = −3.4) (R2 = 0.5216). Anti-B hemolysis was higher in IgM (ß = 8.7) than in IgG (ß = 0.0) (R2 = 0.5114). There was a large variation in hemolysis within the same Ab titer.Conclusions:
CDC can be used in a new trial for ABO Ab measurement. Furthermore, IgM rather than IgG seems to play a significant role in vivo activity, consistent with previous knowledge. Thus, this study may help in the development of the ABO Ab titration supplement test for post-transplant treatment policy establishment and pre-transplant desensitization.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sistema del Grupo Sanguíneo ABO
/
Trasplante de Riñón
Límite:
Humans
Idioma:
En
Revista:
Medicina (Kaunas)
Asunto de la revista:
MEDICINA
Año:
2022
Tipo del documento:
Article