2006 Fiscal Year Final Research Report Summary
Development of the new strategy in ABO blood group incompatible transplantation
| Project/Area Number |
17209044
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General surgery
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| Research Institution | KEIO UNIVERSITY |
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Principal Investigator |
KITAJIMA Masaki Keio University, School of Medicine, Professor, 医学部, 教授 (90112672)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMAZU Motohide Keio University, School of Medicine, Honorary Professor, 医学部, 客員教授 (70124948)
TANABE Minoru Keio University, School Medicine, Lecturer, 医学部, 講師 (50197513)
KAWACHI Shigeyuki Keio University, School of Medicine, Assistant, 医学部, 助手 (80234079)
NARIMATSU Hisashi National Institute of Advanced Industrial Science and Technology, Secondary center director, 糖鎖医工学研究センター, 副研究センター長 (40129581)
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| Project Period (FY) |
2005 – 2006
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| Keywords | living donor liver transplantation / ABO blood group incompatibility |
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| Research Abstract |
The major barrier to ABO-incompatible solid organ transplantation is the acute humoral rejection, leading to graft dysfunction. Humoral rejection associated with ABO-incompatible, transplantation is triggered by antidonor blood group A/B antibodies that bind to the endothelium of the donor's organ.
We tried to develop the new methods of neutralizing the blood group antigen to overcome ABO-incompatible transplantation, which were performed by (1) RNA interference or (2) glycosidases.
(1) Firstly, small interference RNA for the ABO blood group gene was created. When the cancer cell lines SW620, LoVo, and SW48 which express A or B antigen were transfected with the small interference RNA, the messenger RNA of the ABO blood group gene were reduced by 70-80%, detected by real time RT-PCR. However, expression of the ABO blood group antigen was not suppressed by small interference RNA, detected by flow cytometry and westernblotting.
(2) Blood group A antigen was not completely degraded by α-N-acetylgalactosaminidase. On the other hand, B antigen was degraded by α-galactosidase, and group B RBCs were converted to group B RBCs, which were detected by flow cytometry. The group AB RBCs reacted with α-galactosidase were converted to group A RBCs. The cancer cell line SW48 which have A and B antigens were also converted to the cells with only A antigens by α-galactosidase.
We succeeded in neutralizing the blood group B antigen by glycosidase.
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