A new human immunoglobulin VH family preferentially rearranged in immature B-cell tumours

A new human immunoglobulin VH family preferentially rearranged in immature B-cell tumours
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一个新的人免疫球蛋白VH家族在未成熟B细胞肿瘤中优先重排

DOI:
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发表时间:
1988
期刊:
影响因子:
64.8
通讯作者:
P. Tucker
P. Tucker
中科院分区:
综合性期刊1区
文献类型:
--
作者:
C. Humphries;A. Shen;W. Kuziel;J. Capra;F. Blattner;P. Tucker

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成人和儿童B细胞瘤形成的流行形式是慢性淋巴细胞性(CLL)和急性淋巴细胞性(ALL)白血病,并且以表达单个重(H)和轻(L)链可变(V)区的细胞的几乎单克隆积累为典型。如果疾病或转化细胞的发育状态以某种方式影响了DNA重排,那么V基因选择可能是随机的,或者是相当有偏见的。我们克隆并测序了三个种系VH基因片段,它们构成了一个新的人VH家族(亚组V),该家族在DH-JH复合物的160个酶对内连接。在约30%的CLL和ALL患者中,一个VH(V)成员重排,但在来自外周血的表达IgM的B细胞系中不重排。在某些肿瘤中,我们检测到缺乏恒定区的截短(VH(V)RNA,其来源于未重排的VH(V)基因。在其他肿瘤和静息脾细胞中,我们检测到大量正常大小的VH(V)相关mRNA,尽管脾B细胞的有丝分裂原刺激导致VH(V)杂交RNA的丢失。这些特点表明,有偏见的重排亚组V可能是在发展选择。
The prevalent forms of adult and childhood B-cell neoplasia are chronic lymphocytic (CLL) and acute lymphocytic (ALL) leukaemia, and are typified by a nearly monoclonal accumulation of cells expressing a single heavy (H) and light (L) chain variable (V) region. V gene selection could be random, or quite biased if the disease or the developmental status of the transformed cell somehow influenced DNA rearrangement. We have cloned and sequenced three germ-line VH gene segments that constitute a new human VH family (subgroup V) linked within 160 kilobase pairs of the DH-JH complex. One VH(V) member is rearranged in about 30% of patients with CLL and ALL, but not in IgM-expressing B-cell lines from peripheral blood. In some tumours, we detect a truncated ( VH(V) RNA devoid of constant regions that originates from unrearranged VH(V) genes. In other tumours and in resting splenocytes, we detect large amounts of normally sized VH(V)-associated mRNA, although stimulation by mitogen of splenic B cells results in loss of VH(V)-hybridizing RNA. These features suggest that biased rearrangement of subgroup V may be under developmental selection.
DOI: --
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影响因子: --
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