Detection of normal B-cell precursors that give rise to colonies producing both kappa and lambda light immunoglobulin chains.
Detection of normal B-cell precursors that give rise to colonies producing both kappa and lambda light immunoglobulin chains.
复制标题
检测产生产生 kappa 和 lambda 轻免疫球蛋白链的集落的正常 B 细胞前体。
DOI：
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发表时间：
1987
影响因子：
11.1
通讯作者：
C. Paige
中科院分区：
文献类型：
--
作者：
H. Sauter;C. Paige
The pre-B-cell cloning assay is an in vitro differentiation system in which B-lymphocyte precursors expand and generate colonies containing immunoglobulin-secreting cells. Analysis of surface characteristics, growth requirements, and kinetics suggested that these cells represent early stages of the B-cell differentiation pathway. Here we describe a modification of the assay, which allowed us to determine the differentiative potential of these clonable pre-B cells. Using a nitrocellulose protein-transfer technique, we studied immunoglobulin light chain expression in colonies derived from fetal mouse liver B-cell precursors; in particular, we explored whether the B-cell precursors are already committed to the expression of a particular light chain gene at the initiation of culture. Our results show that fetal liver-derived B-cell progenitors generate colonies in vitro that secrete kappa and lambda light chains at a ratio similar to that found in colonies derived from adult splenic B cells. Further, we document the existence of colonies that are derived from single cells and that simultaneously secrete both types of light chains. This indicates that the progenitors of (kappa + lambda)-producing colonies are light chain-uncommitted at the initiation of culture. These cells are able to rearrange their light chain genes in vitro and differentiate along the B-cell pathway to form colonies secreting both kappa and lambda chains.
