title: CEMP1 Induces Transformation in Human Gingival Fibroblasts.
abstract: Cementum Protein 1 (CEMP1) is a key regulator of cementogenesis. CEMP1 promotes cell attachment, differentiation, deposition rate, composition, and morphology of hydroxyapatite crystals formed by human cementoblastic cells. Its expression is restricted to cementoblasts and progenitor cell subpopulations present in the periodontal ligament. CEMP1 transfection into non-osteogenic cells such as adult human gingival fibroblasts results in differentiation of these cells into a "mineralizing" cell phenotype. Other studies have shown evidence that CEMP1 could have a therapeutic potential for the treatment of bone defects and regeneration of other mineralized tissues. To better understand CEMP1's biological effects in vitro we investigated the consequences of its expression in human gingival fibroblasts (HGF) growing in non-mineralizing media by comparing gene expression profiles. We identified several mRNAs whose expression is modified by CEMP1 induction in HGF cells. Enrichment analysis showed that several of these newly expressed genes are involved in oncogenesis. Our results suggest that CEMP1 causes the transformation of HGF and NIH3T3 cells. CEMP1 is overexpressed in cancer cell lines. We also determined that the region spanning the CEMP1 locus is commonly amplified in a variety of cancers, and finally we found significant overexpression of CEMP1 in leukemia, cervix, breast, prostate and lung cancer. Our findings suggest that CEMP1 exerts modulation of a number of cellular genes, cellular development, cellular growth, cell death, and cell cycle, and molecules associated with cancer.
authors.affiliation: Laboratorio de Biología Periodontal, Facultad de Odontología, Universidad Nacional Autónoma de México, Mexico City, México.
authors.forename: Mercedes
authors.initials: M
authors.lastname: Bermúdez
authors.affiliation: Instituto Nacional de Medicina Genomica, SSA, Mexico City, México.
authors.forename: Ivan
authors.initials: I
authors.lastname: Imaz-Rosshandler
authors.affiliation: Instituto Nacional de Medicina Genomica, SSA, Mexico City, México.
authors.forename: Claudia
authors.initials: C
authors.lastname: Rangel-Escareño
authors.affiliation: Ostrow School of Dentistry, University of Southern California, Los Angeles, California, United States of America.
authors.forename: Margarita
authors.initials: M
authors.lastname: Zeichner-David
authors.affiliation: Laboratorio de Biología Periodontal, Facultad de Odontología, Universidad Nacional Autónoma de México, Mexico City, México.
authors.forename: Higinio
authors.initials: H
authors.lastname: Arzate
authors.affiliation: Instituto Nacional de Medicina Genomica, SSA, Mexico City, México.
authors.forename: Gabriela E
authors.initials: GE
authors.lastname: Mercado-Celis
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000378:metabolism / Q000473:pathology; D063646:Carcinogenesis / Q000235:genetics / Q000378:metabolism; D002454:Cell Differentiation / Q000235:genetics; D002460:Cell Line; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000235:genetics; D002471:Cell Transformation, Neoplastic / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*; D005347:Fibroblasts / Q000378:metabolism* / Q000473:pathology*; D005881:Gingiva / Q000378:metabolism* / Q000473:pathology*; D006801:Humans; D051379:Mice; D041681:NIH 3T3 Cells; D011506:Proteins / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics; D012038:Regeneration / Q000235:genetics; D059467:Transcriptome / Q000235:genetics
chemical_list: C510886:CEMP1 protein, human; D011506:Proteins; D012333:RNA, Messenger