Ectopic Expression of a Truncated Isoform of Hair Keratin 81 in Breast Cancer Alters Biophysical Characteristics to Promote Metastatic Propensity.

Ectopic Expression of a Truncated Isoform of Hair Keratin 81 in Breast Cancer Alters Biophysical Characteristics to Promote Metastatic Propensity.
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DOI:
10.1002/advs.202300509
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发表时间:
2024-02
期刊:
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子:
--
通讯作者:
Yu M
Yu M
中科院分区:
其他
文献类型:
--
作者:
Kang DS;Moriarty A;Wang YJ;Thomas A;Hao J;Unger BA;Klotz R;Ahmmed S;Amzaleg Y;Martin S;Vanapalli S;Xu K;Smith A;Shen K;Yu M

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Keratins are an integral part of cell structure and function. Here, it is shown that ectopic expression of a truncated isoform of keratin 81 (tKRT81) in breast cancer is upregulated in metastatic lesions compared to primary tumors and patient‐derived circulating tumor cells, and is associated with more aggressive subtypes. tKRT81 physically interacts with keratin 18 (KRT18) and leads to changes in the cytosolic keratin intermediate filament network and desmosomal plaque formation. These structural changes are associated with a softer, more elastically deformable cancer cell with enhanced adhesion and clustering ability leading to greater in vivo lung metastatic burden. This work describes a novel biomechanical mechanism by which tKRT81 promotes metastasis, highlighting the importance of the biophysical characteristics of tumor cells. Herein, a novel biomechanical mechanism is described by which ectopic expression of a truncated isoform of keratin 81 (tKRT81) promotes breast cancer metastasis. tKRT81 interacts with keratin 18, altering the cytosolic keratin intermediate filament network and desmosomal plaque formation, which is associated with a softer, more elastically deformable cell, enhanced adhesion and clustering ability, and greater in vivo lung metastasis.
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