title: Small integrin binding ligand N-linked glycoprotein gene family expression in different cancers.
abstract: OBJECTIVE
  Members of the small integrin binding ligand N-linked glycoprotein (SIBLING) gene family have the capacity to bind and modulate the activity of matrix metalloproteinases (MMPs). The expression levels of five SIBLING gene family members [bone sialoprotein (BSP), osteopontin (OPN), dentin matrix protein 1 (DMP1), matrix extracellular phosphoglycoprotein (MEPE), and dentin sialophosphoprotein (DSPP)] and certain MMPs were determined using a commercial cancer array.
  
  
  METHODS
  Cancer profiling arrays containing normalized cDNA from both tumor and corresponding normal tissues from 241 individual patients were used to screen for SIBLING and MMP expression in nine distinct cancer types.
  
  
  RESULTS
  Significantly elevated expression levels were observed for BSP in cancer of the breast, colon, stomach, rectum, thyroid, and kidney; OPN in cancer of the breast, uterus, colon, ovary, lung, rectum, and thyroid; DMP1 in cancer of the breast, uterus, colon, and lung; and dentin sialophosphoprotein in breast and lung cancer. The degree of correlation between a SIBLING and its partner MMP was found to be significant within a given cancer type (e.g., BSP and MMP-2 in colon cancer, OPN and MMP-3 in ovarian cancer; DMP1 and MMP-9 in lung cancer). The expression levels of SIBLINGs were distinct within subtypes of cancer (e.g., breast ductal tumors compared with lobular tumors). In general, SIBLING expression increased with cancer stage for breast, colon, lung, and rectal cancer.
  
  
  CONCLUSIONS
  These results suggest SIBLINGs as potential markers of early disease progression in a number of different cancer types, some of which currently lack vigorous clinical markers.
authors.affiliation: Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA.
authors.forename: Larry W
authors.initials: LW
authors.lastname: Fisher
authors.forename: Alka
authors.initials: A
authors.lastname: Jain
authors.forename: Matt
authors.initials: M
authors.lastname: Tayback
authors.forename: Neal S
authors.initials: NS
authors.lastname: Fedarko
mesh_terms: D015342:DNA Probes; D016326:Extracellular Matrix Proteins / Q000235:genetics* / Q000378:metabolism; D015870:Gene Expression; D006023:Glycoproteins / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D058574:Integrin-Binding Sialoprotein; D008024:Ligands; D020782:Matrix Metalloproteinases / Q000235:genetics* / Q000378:metabolism; D009369:Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D053495:Osteopontin; D010750:Phosphoproteins / Q000235:genetics* / Q000378:metabolism; D011485:Protein Binding; D011498:Protein Precursors / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012334:RNA, Neoplasm / Q000235:genetics / Q000378:metabolism; D012795:Sialoglycoproteins / Q000235:genetics* / Q000378:metabolism; D000099311:Dentin Sialophosphoprotein
chemical_list: D015342:DNA Probes; D016326:Extracellular Matrix Proteins; D006023:Glycoproteins; D058574:Integrin-Binding Sialoprotein; D008024:Ligands; D020782:Matrix Metalloproteinases; D053495:Osteopontin; D010750:Phosphoproteins; D011498:Protein Precursors; D012333:RNA, Messenger; D012334:RNA, Neoplasm; D012795:Sialoglycoproteins; D000099311:Dentin Sialophosphoprotein; C513309:DMP1 protein, human; C546871:IBSP protein, human; C546873:Ibsp protein, rat; C486579:MEPE protein, human; C506895:SPP1 protein, human; C506897:Spp1 protein, rat