Abstract:
:Following bone marrow stem cell transplantation allo-responses against haemopoietic progenitor cells (HPC), causing graft rejection and graft-versus-leukaemia effects, can be induced by donor T cells recognizing peptides derived from polymorphic endogenous proteins present in HPC. Since CD33 and CD34 are both expressed on HPC, we looked for genetic polymorphisms that might be the source of minor histocompatibility antigens (mHA) on such cells. Bone marrow from 14 donors and their HLA-identical recipients undergoing BMT for haematological malignancies were studied. Using non-radioactive single-strand conformation polymorphism analysis (cold SSCP) of complementary DNA encoding CD33 and CD34, three DNA polymorphisms, two in CD33 and one in CD34 were found and sequenced. Two were in non-coding regions, but in CD33, ATA or ATG at codon 183 resulted in an Ile or Met in the protein sequence. Nonapeptides derived from both alleles were predicted to bind to HLA A68.1. Thus two alleles of CD33 protein exist that could be mHA. With an alternate allele frequency of < 10%, allo-responses against CD33 would be uncommon after marrow transplantation. However, donors homozygous for this allele could be used to generate cytotoxic T cells against the frequent CD33 allele, for adoptive therapy of leukaemia.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Raptis A,Clave E,Mavroudis D,Molldrem J,Van Rhee F,Barrett AJdoi
10.1046/j.1365-2141.1998.00906.xsubject
Has Abstractpub_date
1998-09-01 00:00:00pages
1354-8issue
5eissn
0007-1048issn
1365-2141journal_volume
102pub_type
杂志文章abstract::During treatment of human red cells with phospholipase A2 from bee venom, a linear increase of the MCV and of the osmotic fragility occurs in parallel with the cleavage of the accessible phospholipids. However, even after maximal hydrolysis, i.e. degradation of up to 65% of the phosphatidylcholines and up to 6% of the...
journal_title:British journal of haematology
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journal_title:British journal of haematology
pub_type: 杂志文章
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