PMID- 19184004 OWN - NLM STAT- MEDLINE DCOM- 20090731 LR - 20211020 IS - 1432-0851 (Electronic) IS - 0340-7004 (Print) IS - 0340-7004 (Linking) VI - 58 IP - 9 DP - 2009 Sep TI - Amyloid precursor-like protein 2 association with HLA class I molecules. PG - 1419-31 LID - 10.1007/s00262-009-0657-z [doi] AB - Amyloid precursor-like protein 2 (APLP2) is a ubiquitously expressed protein. The previously demonstrated functions for APLP2 include binding to the mouse major histocompatibility complex (MHC) class I molecule H-2K(d) and down regulating its cell surface expression. In this study, we have investigated the interaction of APLP2 with the human leukocyte antigen (HLA) class I molecule in human tumor cell lines. APLP2 was readily detected in pancreatic, breast, and prostate tumor lines, although it was found only in very low amounts in lymphoma cell lines. In a pancreatic tumor cell line, HLA class I was extensively co-localized with APLP2 in vesicular compartments following endocytosis of HLA class I molecules. In pancreatic, breast, and prostate tumor lines, APLP2 was bound to the HLA class I molecule. APLP2 was found to bind to HLA-A24, and more strongly to HLA-A2. Increased expression of APLP2 resulted in reduced surface expression of HLA-A2 and HLA-A24. Overall, these studies demonstrate that APLP2 binds to the HLA class I molecule, co-localizes with it in intracellular vesicles, and reduces the level of HLA class I molecule cell surface expression. FAU - Tuli, Amit AU - Tuli A AD - Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA. FAU - Sharma, Mahak AU - Sharma M FAU - Wang, Xiaojian AU - Wang X FAU - Simone, Laura C AU - Simone LC FAU - Capek, Haley L AU - Capek HL FAU - Cate, Steven AU - Cate S FAU - Hildebrand, William H AU - Hildebrand WH FAU - Naslavsky, Naava AU - Naslavsky N FAU - Caplan, Steve AU - Caplan S FAU - Solheim, Joyce C AU - Solheim JC LA - eng GR - R01 GM074876-03/GM/NIGMS NIH HHS/United States GR - GM74876/GM/NIGMS NIH HHS/United States GR - T32 CA009476-19A1/CA/NCI NIH HHS/United States GR - R01 GM057428/GM/NIGMS NIH HHS/United States GR - GM57428/GM/NIGMS NIH HHS/United States GR - R01 GM057428-09/GM/NIGMS NIH HHS/United States GR - P30 CA036727/CA/NCI NIH HHS/United States GR - P30CA036727/CA/NCI NIH HHS/United States GR - R01 GM074876/GM/NIGMS NIH HHS/United States GR - T32 CA009476/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20090131 PL - Germany TA - Cancer Immunol Immunother JT - Cancer immunology, immunotherapy : CII JID - 8605732 RN - 0 (APLP2 protein, human) RN - 0 (Amyloid beta-Protein Precursor) RN - 0 (HLA-A Antigens) RN - 0 (HLA-A2 Antigen) RN - 0 (HLA-A24 Antigen) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Nerve Tissue Proteins) SB - IM EIN - Cancer Immunol Immunother. 2010 Feb;59(2):339 MH - Amyloid beta-Protein Precursor/*metabolism MH - Blotting, Western MH - Cell Membrane/*metabolism MH - Flow Cytometry MH - Fluorescent Antibody Technique MH - HLA-A Antigens/*metabolism MH - HLA-A2 Antigen/*metabolism MH - HLA-A24 Antigen MH - Histocompatibility Antigens Class I/*metabolism MH - Humans MH - Immunoprecipitation MH - Neoplasms/*metabolism/pathology MH - Nerve Tissue Proteins/*metabolism MH - Tumor Cells, Cultured PMC - PMC2719714 MID - NIHMS101247 EDAT- 2009/02/03 09:00 MHDA- 2009/08/01 09:00 PMCR- 2009/01/31 CRDT- 2009/02/03 09:00 PHST- 2008/10/08 00:00 [received] PHST- 2009/01/02 00:00 [accepted] PHST- 2009/02/03 09:00 [entrez] PHST- 2009/02/03 09:00 [pubmed] PHST- 2009/08/01 09:00 [medline] PHST- 2009/01/31 00:00 [pmc-release] AID - 657 [pii] AID - 10.1007/s00262-009-0657-z [doi] PST - ppublish SO - Cancer Immunol Immunother. 2009 Sep;58(9):1419-31. doi: 10.1007/s00262-009-0657-z. Epub 2009 Jan 31.