[Preliminary study on conversion of RhD positive red blood cells to RhD negative by modification with methoxy polyethylene glycol].
Rh is a very important blood group like ABO blood system in transfusion medicine. It causes severe transfusion reaction and hemolytic disease of the newborn (HDN) if RhD blood group does not match between the donor and the recipient. The population of RhD negative is only about 0.2% - 0.5% in Chinese. Conversion of RhD positive RBCs to RhD negative is very important in clinical transfusion. This study was to try to modify RhD antigen located on the surface of A, B, O and AB red blood cells in order to convert RhD positive to RhD negative by the modification of four kinds of methoxypolyethylene glycol (mPEG) derivatives and to observe the effect of mPEG modification on cell morphology, structure and function. The result demonstrated that modification efficiency of mPEG-BTC (mPEG-benzotriazole carbonate) was better than other three kinds of mPEG derivatives. It could camouflage RhD antigen efficiently when the concentration reached to 1 mmol/L. The result also showed that there were no harmful effects of mPEG modification on cell morphology, osmotic fragility, hemolysis, AchE, cholesterol, ATP, 2,3-DPG and deformability. It is suggested that success in converting RhD positive RBCs to RhD negative was preliminarily achieved.
Li
Li-Li
LL
Institute of Blood Transfusion, Academy of Military Medical Sciences, Beijing 100850, China.
Wang
Jie-Xi
JX
Tan
Ying-Xia
YX
Zhang
Yang-Pei
YP
D004912:Erythrocytes / Q000187:drug effects* / Q000276:immunology / Q000502:physiology; D006801:Humans; D011092:Polyethylene Glycols / Q000494:pharmacology*; D012204:Rh-Hr Blood-Group System / Q000276:immunology*
D012204:Rh-Hr Blood-Group System; D011092:Polyethylene Glycols; C028210:monomethoxypolyethylene glycol