Mammary-specific expression of Trim24 establishes a mouse model of human metaplastic breast cancer.

Mammary-specific expression of Trim24 establishes a mouse model of human metaplastic breast cancer.
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DOI:
10.1038/s41467-021-25650-z
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发表时间:
2021-09-10
影响因子:
16.6
通讯作者:
Barton MC
Barton MC
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Shah VV;Duncan AD;Jiang S;Stratton SA;Allton KL;Yam C;Jain A;Krause PM;Lu Y;Cai S;Tu Y;Zhou X;Zhang X;Jiang Y;Carroll CL;Kang Z;Liu B;Shen J;Gagea M;Manu SM;Huo L;Gilcrease M;Powell RT;Guo L;Stephan C;Davies PJ;Parker-Thornburg J;Lozano G;Behringer RR;Piwnica-Worms H;Chang JT;Moulder SL;Barton MC

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小鼠乳腺上皮细胞(Trim 24 COE)中含有组蛋白阅读器三方基序的蛋白24(TRIM 24)的条件性过表达驱动缺乏ER、PR和HER 2的乳腺癌肉瘤肿瘤的自发发展。人类癌肉瘤或化生性乳腺癌(MpBC)是三阴性乳腺癌(TNBC)中一种罕见的、化学难治性的亚类。Trim 24 COE化生性癌肉瘤形态、TRIM 24蛋白水平和衍生的Trim 24 COE基因特征的比较揭示了与人MpBC肿瘤和MpBC患者衍生的异种移植物(PDX)模型的强相关性。整体和单细胞肿瘤分析显示Met是TRIM 24的直接致癌靶点,导致异常PI 3 K/mTOR激活。在这里,我们发现,在原代Trim 24 COE肿瘤细胞中这些途径的药理学抑制和MpBC TNBC PDX肿瘤球的TRIM 24-PROTAC处理降低了细胞活力,表明在TRIM 24表达的TNBC中治疗靶向TRIM 24及其调节途径的潜力。人化生性乳腺癌(MpBC)是三阴性乳腺癌的一种罕见的侵袭性亚型。在这里,作者表明组蛋白阅读器TRIM 24的过度表达足以在人类MpBC的小鼠模型中产生具有代谢功能障碍和EMT分子特征的肿瘤。
Conditional overexpression of histone reader Tripartite motif containing protein 24 (TRIM24) in mouse mammary epithelia (Trim24COE) drives spontaneous development of mammary carcinosarcoma tumors, lacking ER, PR and HER2. Human carcinosarcomas or metaplastic breast cancers (MpBC) are a rare, chemorefractory subclass of triple-negative breast cancers (TNBC). Comparison of Trim24COE metaplastic carcinosarcoma morphology, TRIM24 protein levels and a derived Trim24COE gene signature reveals strong correlation with human MpBC tumors and MpBC patient-derived xenograft (PDX) models. Global and single-cell tumor profiling reveal Met as a direct oncogenic target of TRIM24, leading to aberrant PI3K/mTOR activation. Here, we find that pharmacological inhibition of these pathways in primary Trim24COE tumor cells and TRIM24-PROTAC treatment of MpBC TNBC PDX tumorspheres decreased cellular viability, suggesting potential in therapeutically targeting TRIM24 and its regulated pathways in TRIM24-expressing TNBC. Human metaplastic breast cancers (MpBC) are a rare, aggressive subclass of triple-negative breast cancers. Here, the authors show over-expression of histone reader TRIM24 is sufficient to generate tumors with a molecular signature of metabolic dysfunction and EMT in a mouse model of human MpBC.
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