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Title: Microenvironment rigidity modulates responses to the HER2 receptor tyrosine kinase inhibitor lapatinib via YAP and TAZ transcription factors

Journal Article · · Molecular Biology of the Cell
 [1];  [2];  [3];  [4];  [4];  [3];  [5]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems and Engineering Division; Univ. of California, Berkeley, CA (United States). Program in Comparative Biochemistry
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems and Engineering Division; Bergen Univ. (Norway). Dept. of Biomedicine
  3. Univ. of California, San Francisco, CA (United States).Dept. of Radiation Oncology
  4. Univ. of California, San Francisco, CA (United States). Dept. of Surgery. Center for Bioengineering, Tissue Regeneration
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems and Engineering Division

Stiffness is a biophysical property of the extracellular matrix that modulates cellular functions, including proliferation, invasion, and differentiation, and it also may affect therapeutic responses. Therapeutic durability in cancer treatments remains a problem for both chemotherapies and pathway-targeted drugs, but the reasons for this are not well understood. Tumor progression is accompanied by changes in the biophysical properties of the tissue, and we asked whether matrix rigidity modulated the sensitive versus resistant states in HER2-amplified breast cancer cell responses to the HER2-targeted kinase inhibitor lapatinib. The antiproliferative effect of lapatinib was inversely proportional to the elastic modulus of the adhesive substrata. Down-regulation of the mechanosensitive transcription coactivators YAP and TAZ, either by siRNA or with the small-molecule YAP/TEAD inhibitor verteporfin, eliminated modulus-dependent lapatinib resistance. Reduction of YAP in vivo in mice also slowed the growth of implanted HER2-amplified tumors, showing a trend of increasing sensitivity to lapatinib as YAP decreased. Thus we address the role of stiffness in resistance to and efficacy of a HER2 pathway–targeted therapeutic via the mechanotransduction arm of the Hippo pathway.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; National Inst. of Health (NIH) (United States); Anita Tarr Turk Fund for Breast Cancer Research (United States)
Contributing Organization:
Univ. of California, Berkeley, CA (United States); Bergen Univ. (Norway)
Grant/Contract Number:
AC02-05CH11231; R00AG033176; R01AG040081; 20IB-0109
OSTI ID:
1378635
Journal Information:
Molecular Biology of the Cell, Vol. 26, Issue 22; ISSN 1059-1524
Publisher:
American Society for Cell BiologyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 93 works
Citation information provided by
Web of Science

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Cited By (20)

A time for YAP1: Tumorigenesis, immunosuppression and targeted therapy: A time for YAP1 journal July 2018
Tumor mechanosensing and its therapeutic potential journal February 2018
Cirrhotic stiffness affects the migration of hepatocellular carcinoma cells and induces sorafenib resistance through YAP journal August 2018
Role of YAP/TAZ transcriptional regulators in resistance to anti-cancer therapies journal November 2016
Cancer-associated fibroblasts as key regulators of the breast cancer tumor microenvironment journal November 2018
Tissue engineering the cancer microenvironment—challenges and opportunities journal November 2018
Biomaterials and engineered microenvironments to control YAP/TAZ-dependent cell behaviour journal October 2018
YAP and TAZ: a signalling hub of the tumour microenvironment journal July 2019
Dynamically stiffened matrix promotes malignant transformation of mammary epithelial cells via collective mechanical signaling journal February 2019
Expression of phosphorylated Hippo pathway kinases (MST1/2 and LATS1/2) in HER2-positive and triple-negative breast cancer patients treated with neoadjuvant therapy journal April 2017
Intravital imaging reveals new ancillary mechanisms co-opted by cancer cells to drive tumor progression journal January 2016
Phenotypic Basis for Matrix Stiffness-Dependent Chemoresistance of Breast Cancer Cells to Doxorubicin journal September 2018
Fructus mume Extracts Alleviate Diarrhea in Breast Cancer Patients Receiving the Combination Therapy of Lapatinib and Capecitabine journal May 2018
Targeting the Hippo Pathway for Breast Cancer Therapy journal November 2018
Melatonin and Hippo Pathway: Is There Existing Cross-Talk? journal September 2017
Mechanobiology of YAP and TAZ in physiology and disease journal September 2017
A one-step tRNA-CRISPR system for genome-wide genetic interaction mapping in mammalian cells journal October 2019
YAP enhances the pro‐proliferative transcriptional activity of mutant p53 proteins journal December 2015
Role of Integrins in Resistance to Therapies Targeting Growth Factor Receptors in Cancer journal May 2019
YAP/TAZ upstream signals and downstream responses journal July 2018

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