Up-regulation and co-expression of fibroblast growth factor receptors in human gastric cancer

Fibroblast growth factor (FGF), a key regulatory factor of cell growth and differentiation, is involved in embryonic development, angiogenesis, and tumorigenesis. To date, four different FGF receptors (FGFRs) have been cloned and characterized. We examined the expression of four FGFRs in human gastr...

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Veröffentlicht in:Journal of cancer research and clinical oncology 2000-09, Vol.126 (9), p.519-528
Hauptverfasser: SHIN, E.-Y, LEE, B.-H, YANG, J.-H, SHIN, K.-S, LEE, G.-K, YUN, H.-Y, SONG, Y.-J, PARK, S. C, KIM, E.-G
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container_issue 9
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container_title Journal of cancer research and clinical oncology
container_volume 126
creator SHIN, E.-Y
LEE, B.-H
YANG, J.-H
SHIN, K.-S
LEE, G.-K
YUN, H.-Y
SONG, Y.-J
PARK, S. C
KIM, E.-G
description Fibroblast growth factor (FGF), a key regulatory factor of cell growth and differentiation, is involved in embryonic development, angiogenesis, and tumorigenesis. To date, four different FGF receptors (FGFRs) have been cloned and characterized. We examined the expression of four FGFRs in human gastric cancer tissues and cell lines using Northern analysis, ribonuclease protection assay, and immunohistochemistry. The mRNAs of FGFR-1 (10/14), FGFR-2 (9/14), and FGFR-4 (9/14) were up-regulated in cancer compared with normal tissues. FGFR-3 mRNAs were barely detectable in both normal and cancer tissues. These FGFR mRNAs were co-expressed in various combinations of two or three in the same tissue. Immunohistochemistry confirmed specific staining of multiple FGFRs, except FGFR-3, in the cancer specimens. To investigate the functional significance of FGFR co-expression we examined the invasive property of SNU-16 cells, which exhibited gene amplification of FGFR-2, -3, and -4 as well as over-expression of keratinocyte growth factor receptor (KGFR), a splice variant of FGFR-2, and FGFR-4 mRNA. KGF plus acidic FGF (aFGF), KGF, and aFGF treatment enhanced the invasive potential of SNU-16 cells over the control by 100%, 107%, and 47%, respectively, indicating that neither additive nor synergistic effect was induced by stimulation with aFGF plus KGF. These results suggest that co-expression of FGFRs in various combinations may cause subtle changes in the progression of gastric cancer.
doi_str_mv 10.1007/s004320000128
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To investigate the functional significance of FGFR co-expression we examined the invasive property of SNU-16 cells, which exhibited gene amplification of FGFR-2, -3, and -4 as well as over-expression of keratinocyte growth factor receptor (KGFR), a splice variant of FGFR-2, and FGFR-4 mRNA. KGF plus acidic FGF (aFGF), KGF, and aFGF treatment enhanced the invasive potential of SNU-16 cells over the control by 100%, 107%, and 47%, respectively, indicating that neither additive nor synergistic effect was induced by stimulation with aFGF plus KGF. 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These results suggest that co-expression of FGFRs in various combinations may cause subtle changes in the progression of gastric cancer.</abstract><cop>Berlin</cop><pub>Springer</pub><pmid>11003564</pmid><doi>10.1007/s004320000128</doi><tpages>10</tpages></addata></record>
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subjects Alternative Splicing
Biological and medical sciences
Blotting, Northern
Fibroblast Growth Factor 1 - pharmacology
Fibroblast Growth Factor 10
Fibroblast Growth Factor 7
Fibroblast Growth Factors
Gastroenterology. Liver. Pancreas. Abdomen
Gene Amplification
Growth Substances - pharmacology
Humans
Immunohistochemistry
Medical sciences
Protein Isoforms
Receptor Protein-Tyrosine Kinases - biosynthesis
Receptor Protein-Tyrosine Kinases - genetics
Receptor, Fibroblast Growth Factor, Type 1
Receptor, Fibroblast Growth Factor, Type 2
Receptors, Fibroblast Growth Factor - biosynthesis
Receptors, Fibroblast Growth Factor - genetics
Receptors, Fibroblast Growth Factor - metabolism
Receptors, Growth Factor - metabolism
RNA, Messenger - biosynthesis
RNA, Messenger - genetics
Stomach Neoplasms - genetics
Stomach Neoplasms - metabolism
Stomach. Duodenum. Small intestine. Colon. Rectum. Anus
Tumors
Up-Regulation
title Up-regulation and co-expression of fibroblast growth factor receptors in human gastric cancer
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