The expression of TIPE1 in murine tissues and human cell lines

Mol Immunol. 2011 Jul;48(12-13):1548-55. doi: 10.1016/j.molimm.2011.04.023. Epub 2011 May 20.


Members of the tumor necrosis factor-alpha-induced protein-8 (TNFAIP8 or TIPE) family play important roles in immune homeostasis and cancer. TIPE1 (TNFAIP8-like 1) is a new member of the TIPE family that may regulate cell death. However, due to the lack of a suitable antibody, the nature of cells and tissues that express TIPE1 protein has not been determined. In this study, we generated a highly specific antibody to TIPE1 and examined TIPE1 expression in various murine tissues and human cell lines by immunohistochemistry, reverse transcription real-time PCR, and Western blot. We found that TIPE1 protein was detected in a wide variety of tissues in C57BL/6 mice, such as neurons in brain, hepatocytes, germ cells of female and male reproductive organs, muscular tissues, and a variety of cells of the epithelial origin, particularly those with secretory functions. TIPE1 protein was not expressed in mature T or B lymphocytes, but detectable in human B lymphoblast cell line HMy2.CIR and murine T cell line EL4. Furthermore, high levels of TIPE1 mRNA were detected in most human carcinoma cell lines, especially in cells transformed with viral genomes. These results indicate that TIPE1 may perform functions in cell secretion and carcinogenesis, but not in immunity.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibodies, Monoclonal / immunology
  • Blotting, Western
  • Cell Line
  • Cell Line, Tumor
  • Central Nervous System / metabolism
  • Endocrine System / metabolism
  • Epithelial Cells / metabolism*
  • Female
  • Gastrointestinal Tract / metabolism
  • Genitalia, Female / metabolism
  • Genitalia, Male / metabolism
  • Humans
  • Intracellular Signaling Peptides and Proteins / genetics*
  • Intracellular Signaling Peptides and Proteins / metabolism*
  • Lymphoid Tissue / metabolism
  • Male
  • Mice
  • Mice, Inbred C57BL
  • RNA, Messenger / biosynthesis
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Respiratory System / metabolism
  • Reverse Transcriptase Polymerase Chain Reaction
  • Spermatozoa / metabolism
  • Urinary Tract / metabolism


  • Antibodies, Monoclonal
  • Intracellular Signaling Peptides and Proteins
  • RNA, Messenger
  • TIPE1 protein, mouse
  • TNFAIP8L1 protein, human