LOCATION AND SEQUENCE OF REARRANGED IMMUNOGLOBULIN GENES IN HUMAN THYMUS

被引：39

作者：

DUNNWALTERS, DK ^{[1
]}

HOWE, CJ ^{[1
]}

ISAACSON, PG ^{[1
]}

SPENCER, J ^{[1
]}

机构：

[1] UCLMS, DEPT HISTOPATHOL, LONDON WC1E 6JJ, ENGLAND

来源：

EUROPEAN JOURNAL OF IMMUNOLOGY | 1995年 / 25卷 / 02期

基金：

英国惠康基金;

关键词：

IMMUNOGLOBULIN; THYMUS; B CELL; V-H GENE; SEQUENCE;

D O I：

10.1002/eji.1830250231

中图分类号：

R392 [医学免疫学]; Q939.91 [免疫学];

学科分类号：

100102 ;

摘要：

Thymic B cells are a proliferating B cell population concentrated in normal thymic medulla. They are large cells, some with dendritic morphology, and are not associated with any organized follicular structure. Previous work in this laboratory has shown that most of these B cells are surrounded by tightly adherent thymocytes. The literature on human thymic B cells contains many inconsistencies. There is no consensus on whether they express CD5. Even the existence of thymic B cells has been questioned. In this study we have undertaken the first analysis of rearranged immunoglobulin (Ig) genes, looking in particular for evidence of affinity maturation. The Ig V-H genes of human thymic B cells in this study are those of the fetal repertoire, though the resemblence to fetal Ig genes is limited in other respects. They are mostly unmutated, but the presence of mutated sequences suggests that this is not a uniform population, as has been previously indicated by phenotypic studies.

引用

页码：513 / 519

页数：7

共 47 条

[1] THE USE OF CHROMOSOMAL TRANSLOCATIONS TO STUDY HUMAN-IMMUNOGLOBULIN GENE ORGANIZATION - MAPPING DH SEGMENTS WITHIN 35 KB OF THE C-MU GENE AND IDENTIFICATION OF A NEW DH LOCUS [J].