title: Expression of monocarboxylate transporters 1, 2, and 4 in human tumours and their association with CD147 and CD44.
abstract: Monocarboxylate transporters (MCTs) are important cellular pH regulators in cancer cells; however, the value of MCT expression in cancer is still poorly understood. In the present study, we analysed MCT1, MCT2, and MCT4 protein expression in breast, colon, lung, and ovary neoplasms, as well as CD147 and CD44. MCT expression frequency was high and heterogeneous among the different tumours. Comparing with normal tissues, there was an increase in MCT1 and MCT4 expressions in breast carcinoma and a decrease in MCT4 plasma membrane expression in lung cancer. There were associations between CD147 and MCT1 expressions in ovarian cancer as well as between CD147 and MCT4 in both breast and lung cancers. CD44 was only associated with MCT1 plasma membrane expression in lung cancer. An important number of MCT1 positive cases are negative for both chaperones, suggesting that MCT plasma membrane expression in tumours may depend on a yet nonidentified regulatory protein.
authors.affiliation: Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal.
authors.forename: Céline
authors.initials: C
authors.lastname: Pinheiro
authors.forename: Rui M
authors.initials: RM
authors.lastname: Reis
authors.forename: Sara
authors.initials: S
authors.lastname: Ricardo
authors.forename: Adhemar
authors.initials: A
authors.lastname: Longatto-Filho
authors.forename: Fernando
authors.initials: F
authors.lastname: Schmitt
authors.forename: Fátima
authors.initials: F
authors.lastname: Baltazar
mesh_terms: D051926:Basigin / Q000378:metabolism*; D015153:Blotting, Western; D045744:Cell Line, Tumor; D006801:Humans; D018960:Hyaluronan Receptors / Q000378:metabolism*; D007150:Immunohistochemistry; D027501:Monocarboxylic Acid Transporters / Q000378:metabolism*; D009124:Muscle Proteins / Q000378:metabolism*; D009369:Neoplasms / Q000378:metabolism* / Q000473:pathology; D027981:Symporters / Q000378:metabolism*; D000099233:Monocarboxylate Transport Protein 1
chemical_list: D051926:Basigin; D018960:Hyaluronan Receptors; D027501:Monocarboxylic Acid Transporters; D009124:Muscle Proteins; D027981:Symporters; D000099233:Monocarboxylate Transport Protein 1; C406962:SLC16A4 protein, human; C490427:SLC16A7 protein, human
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