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在转基因小鼠中,Ttg-1在胸腺中的过表达会导致T细胞急性淋巴细胞白血病/淋巴瘤。

Thymic overexpression of Ttg-1 in transgenic mice results in T-cell acute lymphoblastic leukemia/lymphoma.

作者信息

McGuire E A, Rintoul C E, Sclar G M, Korsmeyer S J

机构信息

Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110.

出版信息

Mol Cell Biol. 1992 Sep;12(9):4186-96. doi: 10.1128/mcb.12.9.4186-4196.1992.

DOI:10.1128/mcb.12.9.4186-4196.1992
PMID:1508213
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC360323/
Abstract

T-cell translocation gene 1 (Ttg-1), also called rhombotin, is deregulated upon translocation into the alpha/delta T-cell receptor loci in acute lymphoblastic leukemias bearing the t(11;14)(p15;q11). Ttg-1 encodes a nuclear protein, expressed predominantly in neuronal cells, which belongs to a novel family of transcription factors possessing LIM domains. We utilized the lck proximal promoter to overexpress this candidate oncogene in immature thymocytes of transgenic mice. lckPr Ttg-1 mice develop immature, aggressive T-cell leukemia/lymphomas. Tumor incidence is proportional to the level of Ttg-1 expression. Most tumors contain CD4+8+ cells as well as CD4-8+ cells, which have an immature rather than a mature peripheral phenotype. Ttg-1-induced tumorigenesis preferentially affects a minority population of thymocytes representing an immature CD4-8+ intermediate stage between double-negative CD4-8- cells and double-positive CD4+8+ cells. This model indicates that the aberrant expression of putative transcription factors plays a primary role in the genesis of T-cell acute lymphoblastic leukemias.

摘要

T细胞易位基因1(Ttg-1),也称为菱蛋白,在携带t(11;14)(p15;q11)的急性淋巴细胞白血病中,易位至α/δ T细胞受体基因座时会发生失调。Ttg-1编码一种主要在神经元细胞中表达的核蛋白,它属于一个拥有LIM结构域的新型转录因子家族。我们利用lck近端启动子在转基因小鼠的未成熟胸腺细胞中过表达这个候选癌基因。lckPr Ttg-1小鼠会发展出未成熟的侵袭性T细胞白血病/淋巴瘤。肿瘤发生率与Ttg-1的表达水平成正比。大多数肿瘤含有CD4+8+细胞以及CD4-8+细胞,这些细胞具有未成熟而非成熟的外周表型。Ttg-1诱导的肿瘤发生优先影响少数胸腺细胞群体,这些细胞代表双阴性CD4-8-细胞和双阳性CD4+8+细胞之间的未成熟CD4-8+中间阶段。该模型表明,假定转录因子的异常表达在T细胞急性淋巴细胞白血病的发生中起主要作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/2c7b35499a11/molcellb00132-0538-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/cb5e7c6739a1/molcellb00132-0532-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/e34068b27f93/molcellb00132-0535-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/f6802c699ee6/molcellb00132-0536-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/2c7b35499a11/molcellb00132-0538-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/cb5e7c6739a1/molcellb00132-0532-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/e34068b27f93/molcellb00132-0535-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/f6802c699ee6/molcellb00132-0536-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/932f/360323/2c7b35499a11/molcellb00132-0538-a.jpg

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