The role of talin2 in breast cancer tumorigenesis and metastasis

Liqing Li, Xiang Li, Lei Qi, Piotr Rychahou, Naser Jafari, Cai Huang

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Recent studies show that talin2 has a higher affinity to β-integrin tails and is indispensable for traction force generation and cell invasion. However, its roles in cell migration, cancer cell metastasis and tumorigenesis remain to be determined. Here, we used MDA-MB-231 human breast cancer cells as a model to define the roles of talin2 in cell migration, invasion, metastasis and tumorigenesis. We show here that talin2 knockdown (KD) inhibited cell migration and focal adhesion dynamics, a key step in cell migration, and that talin2 knockout (KO) inhibited cell invasion and traction force generation, the latter is crucial for cell invasion. Re-expression of talin2WT in talin2-KO cells restored traction force generation and cell invasion, but that of talin2S339C, a β-integrin-binding deficient mutant, did not. Moreover, talin2 KO (or KD) suppressed tumorigenesis and metastasis in mouse xenograft models. However, surprisingly, re-expression of talin2WT in talin2-KO cells did not rescue tumorigenesis. Thus, talin2 is required for breast cancer cell migration, invasion, metastasis and tumorigenesis, although exogenous expression of high levels of talin2 could inhibit tumorigenesis.

Original languageEnglish
Pages (from-to)106876-106887
Number of pages12
JournalOncotarget
Volume8
Issue number63
DOIs
StatePublished - 2017

Bibliographical note

Publisher Copyright:
© Li et al.

Keywords

  • Cell migration
  • Invasion
  • Metastasis
  • Talin2
  • Tumor growth

ASJC Scopus subject areas

  • Oncology

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