0000000000654436

AUTHOR

Kirsten Frerichs

showing 4 related works from this author

Coexpression of receptor-tyrosine-kinases in gastric adenocarcinoma-a rationale for a molecular targeting strategy?

2007

AIM: To define the (co-)expression pattern of target receptor-tyrosine-kinases (RTK) in human gastric adenocarcinoma. METHODS: The (co-)expression pattern of VEGFR1-3, PDGFRα/β and EGFR1 was analyzed by RT-PCR in 51 human gastric adenocarcinomas. In addition, IHC staining was applied for confirmation of expression and analysis of RTK localisation. RESULTS: The majority of samples revealed a VEGFR1 (98%), VEGFR2 (80%), VEGFR3 (67%), PDGFRα (82%) and PDGFRβ (82%) expression, whereas only 62% exhibited an EGFR1 expression. 78% of cancers expressed at least four out of six RTKs. While VEGFR1-3 and PDGFRα revealed a predominantly cytoplasmatic staining in tumor cells, accompanied by an additiona…

Pathologymedicine.medical_specialtyStromal cellAntineoplastic AgentsAdenocarcinomaReceptor tyrosine kinaseStomach NeoplasmsmedicineGastric mucosaHumansProtein Kinase InhibitorsbiologyReverse Transcriptase Polymerase Chain ReactionfungiGastroenterologyReceptor Protein-Tyrosine KinasesCancerGeneral Medicinemedicine.diseaseImmunohistochemistrydigestive system diseasesStainingmedicine.anatomical_structureGastric MucosaDrug Designbiology.proteinCancer researchAdenocarcinomaImmunohistochemistryDrug Therapy CombinationRapid CommunicationPlatelet-derived growth factor receptorWorld Journal of Gastroenterology
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High miR-196a levels promote the oncogenic phenotype of colorectal cancer cells.

2009

AIM: To analyze the relevance of the microRNA miR-196a for colorectal oncogenesis. METHODS: The impact of miR-196a on the restriction targets HoxA7, HoxB8, HoxC8 and HoxD8 was analyzed by reverse transcription polymerase chain reaction (RT-PCR) after transient transfection of SW480 cancer cells. The miR-196a transcription profile in colorectal cancer samples, mucosa samples and diverse cancer cell lines was quantified by RT-PCR. Transiently miR-196a-transfected colorectal cancer cells were used for diverse functional assays in vitro and for a xenograft lung metastasis model in vivo. RESULTS: HoxA7, HoxB8, HoxC8 and HoxD8 were restricted by miR-196a in a dose-dependent and gene-specific mann…

Transcription GeneticColorectal cancerColonTransplantation HeterologousMouse model of colorectal and intestinal cancerBiologymedicine.disease_causeMiceCell Line TumormicroRNAmedicineCell AdhesionAnimalsHumansProtein kinase BCell ProliferationAkt/PKB signaling pathwayGastroenterologyGeneral MedicineOriginal Articlesmedicine.diseaseReverse transcription polymerase chain reactionMicroRNAsPhenotypeCancer cellCancer researchCarcinogenesisColorectal NeoplasmsNeoplasm TransplantationSignal TransductionWorld journal of gastroenterology
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Co-expression of receptor tyrosine kinases in esophageal adenocarcinoma and squamous cell cancer.

2008

This study aimed to define the co-expression pattern of target receptor tyrosine kinases (RTKs) in human esophageal adenocarcinoma and squamous cell cancer. The co-expression pattern of vascular endothelial growth factor receptor (VEGFR)1-3, platelet-derived growth factor receptor (PDGFR)alpha/beta and epidermal growth factor receptor 1 (EGFR1) was analyzed by RT-PCR in 50 human esophageal cancers (35 adenocarcinomas and 15 squamous cell cancers). In addition, IHC staining was applied for the confirmation of the expression and analysis of RTK localisation. The adenocarcinoma samples revealed VEGFR1 (97%), VEGFR2 (94%), VEGFR3 (77%), PDGFRalpha (91%), PDGFRbeta (85%) and EGFR1 (97%) expressi…

Cancer ResearchPathologymedicine.medical_specialtyReceptor Platelet-Derived Growth Factor alphaEsophageal NeoplasmsAdenocarcinomaReceptor tyrosine kinaseReceptor Platelet-Derived Growth Factor betaGrowth factor receptormedicineHumansEpidermal growth factor receptorVascular Endothelial Growth Factor Receptor-1biologyOncogeneCancerReceptor Protein-Tyrosine KinasesGeneral Medicinemedicine.diseaseVascular Endothelial Growth Factor Receptor-3ImmunohistochemistryVascular Endothelial Growth Factor Receptor-2ErbB ReceptorsOncologyEpidermoid carcinomacardiovascular systembiology.proteinCancer researchCarcinoma Squamous CellAdenocarcinomaPlatelet-derived growth factor receptorOncology reports
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PDGFRa/β expression correlates with the metastatic behavior of human colorectal cancer: A possible rationale for a molecular targeting strategy

2008

As new multi-target tyrosine kinase inhibitors are emerging in the therapy of various malignancies, our aim was to define the co-expression pattern of receptor-tyrosine-kinase platelet-derived growth factor receptors alpha and beta (PDGFRalpha/beta) in human colorectal cancer. The co-expression pattern of PDGFRalpha/beta was analyzed by RT-PCR in 99 histologically confirmed human colorectal carcinomas and five colorectal cancer cell lines. In addition, immunohistochemical (IHC) staining was applied for confirmation of expression and analysis of receptor tyrosine kinase (RTK) localisation. The colorectal cancer cell lines that were analysed revealed varying expression intensities of PDGFRalp…

Cancer ResearchPathologymedicine.medical_specialtyStromal cellbiologyOncogeneColorectal cancerbusiness.industryCancerGeneral Medicinemedicine.diseaseMolecular medicineOncologyGrowth factor receptorCancer researchbiology.proteinmedicineImmunohistochemistrybusinessPlatelet-derived growth factor receptor
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