Abstract：
:In the human, most IgM+IgD+ as well as CD5+ peripheral blood B cells express unmutated V genes and thus can be assigned to a pre-germinal centre (GC) stage of development. The memory B-cell compartment generated in the GC reaction and characterized by cells bearing somatically mutated V-region genes consists not only of class-switched cells, but also of IgM-only B cells and perhaps a subset of IgM+IgD+B cells expressing the CD27 antigen. Comparison of the rearranged V-region genes of human B-cell lymphomas with those of the normal B-cell subsets allows the identification of the progenitor cells of these tumours in terms of their stage of maturation. On this basis, most B-cell non-Hodgkin lymphomas, and in addition Hodgkin and Reed-Sternberg (HRS) cells in Hodgkin's disease (HD), are derived from B cells at a GC or post-GC stage of development. The mutation pattern indicates that the precursors of the tumour clones have been stringently selected for expression of a functional antigen receptor with one notable exception: HRS cells in classical (but not lymphocyte-predominant) HD appear to be derived from "crippled" GC B cells. Sequence analysis of rearranged V genes amplified from single tonsillar GC B cells revealed that the somatic hypermutation process introduces deletions and/or insertions into V-region genes more frequently than indicated by previous investigations. Presumably, this feature of the hypermutation mechanism is often responsible for the generation of heavy chain disease, and also several types of chromosomal translocations of oncogenes into immunoglobulin loci in human B-cell lymphomas.
journal_name
Immunol Revjournal_title
Immunological reviewsauthors
Klein U,Goossens T,Fischer M,Kanzler H,Braeuninger A,Rajewsky K,Küppers Rdoi
10.1111/j.1600-065x.1998.tb01447.xsubject
Has Abstractpub_date
1998-04-01 00:00:00pages
261-80eissn
0105-2896issn
1600-065Xjournal_volume
162pub_type
杂志文章,评审abstract：:The precise mechanisms that govern memory T-cell lineage commitment during an immune response continue to be the subject of intense scrutiny. The existence of memory T-cell subsets defined by location, function, and phenotype adds an additional layer of complexity to the overall memory T-cell population. In this revie...
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更新日期：2012-01-01 00:00:00
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journal_title：Immunological reviews
pub_type： 杂志文章,评审
doi：10.1111/j.1600-065x.1997.tb01014.x
更新日期：1997-10-01 00:00:00
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更新日期：1999-12-01 00:00:00
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pub_type： 杂志文章,评审
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更新日期：1999-02-01 00:00:00
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更新日期：2001-08-01 00:00:00
