Ig V region hypermutation in B cell hybrids mimics in vivo mutation and allows for isolation of clonal variants.
Ig V region hypermutation in B cell hybrids mimics in vivo mutation and allows for isolation of clonal variants.
复制标题
B 细胞杂交体中的 Ig V 区超突变模拟体内突变,并允许分离克隆变体。
DOI:
10.1016/s0161-5890(97)00131-4
复制
发表时间:
1997
影响因子:
3.6
通讯作者:
Scharft,MD
中科院分区:
文献类型:
--
作者:
Green,NS;Verdugo,G;Getman,ME;Scharft,MD
In order to investigate the regulation of Ig hypermutation, we have established a cell culture system in which reversion of a V region stop codon in a stably transfected Ig gene permits the quantitation of mutation rates by fluctuation analysis. Transfected heavy chain V regions associated with the μ constant region undergo low rates of mutation in the NSO plasmacytoma cell line and a moderate rate of mutation in the 18.81 pre-B cell line. Most of the hybrids created by fusing these two cell lines resembled the non-permissive NSO cell line, though a few hybrids had constitutive V region mutation rates that were even higher than 18.81 and similar to the high rates of mutation that occur in vivo (Green, N. S., Rabinowitz, J. L., Zhu, M., Kobrin, B. J. and Scharff, M. D. (1995) Proc. Nat. Acad. Sci. (USA)92, 6304–6308). Characterization of these hybrids now demonstrates that the transfected genes were integrated outside of the Ig locus. Mutation was due to multiple single base pair replacements in the V region and not the C region, was ongoing and often arose in hot spot motifs described by V region hypermutation in vivo. Subcloning of unstable hybrids allowed for the isolation of highly related clones with 44–70-fold different mutation rates. These results suggest that V region hypermutation in this mode in vitro systems is under both positive and negative regulation.
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DOI:
10.1016/0167-4781(92)90134-l
发表时间:
1992-11-15
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
ROGOZIN, IB;KOLCHANOV, NA
通讯作者:
KOLCHANOV, NA
DOI:
10.1073/pnas.92.14.6304
发表时间:
1995
影响因子:
11.1
作者:
Green,NS;Rabinowitz,JL;Zhu,M;Kobrin,BJ;Scharff,MD
通讯作者:
Scharff,MD
影响因子:
4.4
作者:
Insel,RA;Varade,WS
通讯作者:
Varade,WS
影响因子:
64.5
作者:
BETZ, AG;MILSTEIN, C;NEUBERGER, MS
通讯作者:
NEUBERGER, MS
影响因子:
4.4
作者:
Diana S. Smith;G. Creadon;Prasanna K. Jena;Joseph P. Portanova;Brian L. Kotzin;L. Wysocki
通讯作者:
L. Wysocki