Novel Regulation of Integrin Trafficking by Rab11-FIP5 in Aggressive Prostate Cancer

Molecular Cancer Research : MCR
Lipsa DasAnne E Cress

Abstract

The laminin-binding integrins, α3β1 and α6β1, are needed for tumor metastasis and their surface expression is regulated by endocytic recycling. β1 integrins share the Rab11 recycling machinery, but the trafficking of α3β1 and α6β1 are distinct by an unknown mechanism. Using a mouse PDX tumor model containing human metastatic prostate cancer, Rab11 family interacting protein 5 (Rab11-FIP5) was identified as a lead candidate for α6β1 trafficking. Rab11-FIP5 and its membrane-binding domain were required for α6β1 recycling, without affecting the other laminin-binding integrin (i.e., α3β1) or unrelated membrane receptors like CD44, transferrin receptor, or E-cadherin. Depletion of Rab11-FIP5 resulted in the intracellular accumulation of α6β1 in the Rab11 recycling compartment, loss of cell migration on laminin, and an unexpected loss of α6β1 recycling in cell-cell locations. Taken together, these data demonstrate that α6β1 is distinct from α3β1 via Rab11-FIP5 recycling and recycles in an unexpected cell-cell location.Implications: Rab11-FIP5-dependent α6β1 integrin recycling may be selectively targeted to limit migration of prostate cancer cells into laminin-rich tissues. Mol Cancer Res; 16(8); 1319-31. ©2018 AACR.

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Citations

Jan 31, 2019·Molecular Biology of the Cell·Mengdie WangAnne E Cress
Jan 4, 2019·Nature Cell Biology·Paulina Moreno-LaysecaJohanna Ivaska
Jun 26, 2020·Physiological Reviews·Paul J DavisHung-Yun Lin
Jan 20, 2021·Development·Jaeho YoonIra O Daar
Nov 17, 2020·Frontiers in Cell and Developmental Biology·Marte SneeggenCinzia Progida
Jan 8, 2021·Biology·Elsi FerroCarlo C Campa
Mar 2, 2021·The Chinese Journal of Physiology·Ling-Yi Kao, Wei-Ting Chao

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