Identification of MΦ specific POTEE expression: Its role in mTORC2 activation via protein-protein interaction in TAMs

Cell Immunol. 2019 Jan:335:30-40. doi: 10.1016/j.cellimm.2018.10.010. Epub 2018 Nov 3.

Abstract

POTE is known as cancer antigen, expressed in many cancers, along with very few normal tissues like prostate, ovary, testes and embryo. Till date, POTEE identified as majorly expressed POTE paralog. Functionally, POTEF regulates TLR signaling which play important role in innate immunity provided clue about expression of POTE in immune cells. We have chosen three Thp1monocytes, Jurkat T1 and MΦ cells as a model. Here, first time we report expression of POTEE in immune cells specifically only in MΦ but not in monocytes or T-cells. In addition, expression level remains unaltered in MΦ subtypes M1 and M2 and MΦ subjected to various stresses, except MΦs treated with Hyp-CM where MΦs acquires properties of TAMs. In TAMs, POTEE was involved differential protein-protein interaction with mTOR, RICTOR, and Rad51 indicating its biological role in cell invasion through mTORC2 activation. siRNA mediated knockdown of POTEE suggests its importance in cell survival of MΦs as well as TAMs.

Keywords: MΦs; POTEE; Protein-protein interaction; TAMs; mTORC2 activation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antigens, Neoplasm / biosynthesis*
  • Antigens, Neoplasm / immunology
  • Cell Movement / immunology
  • Cells, Cultured
  • Humans
  • Immunity, Innate
  • Jurkat Cells
  • Macrophages / immunology
  • Macrophages / metabolism*
  • Mechanistic Target of Rapamycin Complex 2 / immunology
  • Mechanistic Target of Rapamycin Complex 2 / metabolism*
  • Monocytes / immunology
  • Monocytes / metabolism
  • Neoplasms / metabolism
  • Signal Transduction
  • T-Lymphocytes / immunology
  • T-Lymphocytes / metabolism
  • THP-1 Cells
  • Transcriptome

Substances

  • Antigens, Neoplasm
  • POTEE protein, human
  • Mechanistic Target of Rapamycin Complex 2