title: Blocking CD147 induces cell death in cancer cells through impairment of glycolytic energy metabolism.
abstract: CD147 is a multifunctional transmembrane protein and promotes cancer progression. We found that the anti-human CD147 mouse monoclonal antibody MEM-M6/1 strongly induces necrosis-like cell death in LoVo, HT-29, WiDr, and SW620 colon cancer cells and A2058 melanoma cells, but not in WI-38 and TIG-113 normal fibroblasts. Silencing or overexpression of CD147 in LoVo cells enhanced or decreased the MEM-M6/1 induced cell death, respectively. CD147 is known to form complex with proton-linked monocarboxylate transporters (MCTs), which is critical for lactate transport and intracellular pH (pHi) homeostasis. In LoVo cells, CD147 and MCT-1 co-localized on the cell surface, and MEM-M6/1 inhibited the association of these molecules. MEM-M6/1 inhibited lactate uptake, lactate release, and reduced pHi. Further, the induction of acidification was parallel to the decrease of the glycolytic flux and intracellular ATP levels. These effects were not found in the normal fibroblasts. As cancer cells depend on glycolysis for their energy production, CD147 inhibition might induce cell death specific to cancer cells.
authors.affiliation: Department of Pathology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Research Institute, 1-3-2 Nakamichi, Higashinari-ku, Osaka 537-8511, Japan. baba-mi@mc.pref.osaka.jp
authors.forename: Miyako
authors.initials: M
authors.lastname: Baba
authors.forename: Masahiro
authors.initials: M
authors.lastname: Inoue
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Itoh
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Nishizawa
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D019138:Antibodies, Blocking / Q000494:pharmacology; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D017209:Apoptosis; D051926:Basigin / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D045744:Cell Line, Tumor; D003110:Colonic Neoplasms / Q000378:metabolism*; D004734:Energy Metabolism; D006019:Glycolysis / Q000187:drug effects; D006801:Humans; D008545:Melanoma / Q000378:metabolism*; D051379:Mice; D027501:Monocarboxylic Acid Transporters / Q000378:metabolism; D034741:RNA, Small Interfering / Q000235:genetics; D027981:Symporters / Q000378:metabolism; D000099233:Monocarboxylate Transport Protein 1
chemical_list: D000255:Adenosine Triphosphate; D019138:Antibodies, Blocking; D000911:Antibodies, Monoclonal; D051926:Basigin; D027501:Monocarboxylic Acid Transporters; D034741:RNA, Small Interfering; D027981:Symporters; D000099233:Monocarboxylate Transport Protein 1