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  • pancreatic cancer  (15)
  • DUCTAL ADENOCARCINOMA  (13)
  • CANCER CELLS  (11)
  • PROTEIN  (10)
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  • 1
    Keywords: CANCER ; EXPRESSION ; SURVIVAL ; tumor ; CELL ; Germany ; human ; COHORT ; PROTEIN ; PROTEINS ; cell line ; TISSUE ; TUMORS ; LINES ; PATIENT ; FAMILY ; CARCINOGENESIS ; TISSUES ; CELL-LINES ; LESIONS ; PROGRESSION ; immunohistochemistry ; CELL-LINE ; LINE ; LOCALIZATION ; POLYMERASE-CHAIN-REACTION ; adenocarcinoma ; ADENOCARCINOMAS ; pathology ; OVEREXPRESSION ; cell lines ; pancreatic cancer ; protein expression ; chemoresistance ; SUBCELLULAR-LOCALIZATION ; SUBSET ; pancreas ; PANCREATIC-CANCER ; FAMILIES ; DUCTAL ADENOCARCINOMA ; polymerase chain reaction ; TUMOR TISSUE ; LEVEL ; analysis ; methods ; pancreatic ; RARE ; SURVIVAL-DATA ; Reverse Transcriptase Polymerase Chain Reaction
    Abstract: AIMS: To determine the role of two antiapoptotic proteins of the IAP family, cIAP1 and cIAP2, in human pancreatic carcinogenesis. METHODS: mRNA levels were measured in pancreatic tissues and pancreatic cancer cell lines by quantitative reverse-transcriptase polymerase chain reaction (QRT-PCR). Protein expression was assessed in pancreatic cancer cell lines by immunoblotting and in pancreatic tissues by immunohistochemistry and correlated with pathological and survival data. RESULTS: cIAP1 expression was constantly high in non-neoplastic pancreatic tissues, in PanIN lesions, as well as in a subset of primary and metastatic pancreatic ductal adenocarcinomas (PDAC), and a preferential cytoplasmatic localization was observed in the tumor tissues. cIAP1 expression was rare in a cohort of cystic tumors. cIAP2 mRNA levels were significantly higher (2.4 fold) in PDAC than in the normal tissues. cIAP2 protein was overexpressed in PDAC and was detectable in low-grade and high-grade PanIN lesions. Moreover, cIAP2 was frequently expressed in pancreatic cystic tumors. cIAP1 and cIAP2 mRNA and protein were detected in all the examined cell lines. Survival analysis revealed a shorter survival in patients with cIAP1/cIAP2-positive tumors. CONCLUSIONS: cIAP1 might contribute to the regulation of the apoptotic process in the normal and in the neoplastic pancreas, depending on its subcellular localization. cIAP2 overexpression is a frequent and early event in pancreatic cancer progression and could therefore potentially influence important pathophysiological aspects of PDAC, such as anoikis or chemoresistance
    Type of Publication: Journal article published
    PubMed ID: 16775116
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  • 2
    Keywords: RECEPTOR ; CANCER ; CANCER CELLS ; CELLS ; EXPRESSION ; GROWTH ; GROWTH-FACTOR ; CELL ; Germany ; TISSUE ; LINES ; TIME ; FAMILY ; INDUCTION ; TISSUES ; CONTRAST ; CELL-LINES ; DOWN-REGULATION ; MEMBER ; MEMBERS ; PHOSPHORYLATION ; BREAST-CANCER ; antibodies ; antibody ; immunohistochemistry ; ASSAY ; CARCINOMA CELLS ; CELL-LINE ; LINE ; CANCER-CELLS ; BETA ; RT-PCR ; adenocarcinoma ; p21 ; CELL-SURFACE ; RECEPTORS ; DIFFERENTIAL EXPRESSION ; cell lines ; pancreatic cancer ; CELL-GROWTH ; signaling ; PANCREATIC-CANCER ; FAMILIES ; DUCTAL ADENOCARCINOMA ; independent growth ; ENHANCED EXPRESSION ; TGF-beta 1 ; HEPARAN-SULFATE PROTEOGLYCANS ; LEVEL ; pancreatic ; ASSAYS ; SULFATE ; downregulation ; lymph node ; LYMPH-NODE ; correlation ; VIEW ; DECREASED SURVIVAL ; activin ; bone morphogenic protein ; CONTROLS CELLULAR-RESPONSES ; glypican ; heparan sulfate proteoglycans ; SMAD PROTEINS
    Abstract: Glypican 1 (GPC1) is a cell surface heparan sulfate proteoglycan that acts as a co-receptor for heparin-binding growth factors as well as for members of the TGF-beta family. GPC1 plays a role in pancreatic cancer by regulating growth factor responsiveness. In view of the importance of members of the TGF-beta family in pancreatic cancer, in the present study, the role of GPC1 in TGF-beta, BMP and activin signaling was analyzed. Quantitative RT-PCR and immunohistochemistry were utilized to analyze GPC1 and TGF-beta, BMP and activin receptor expression levels. Panc-1 and T3M4 pancreatic cancer cells were transfected in a stable manner with a GPC1 antisense expression construct. Anchorage-dependent and -independent growth was determined by MTT and soft agar assays. TGF-beta 1, activin-A and BMP-2 responsiveness was determined by MTT assays and immunoblotting with p21, p-Smad1, and p-Smad2 antibodies. QRT-PCR demonstrated increased GPC1 mRNA levels in pancreatic ductal adenocarcinoma (PDAC) compared to normal pancreatic tissues (NPT), as described previously. There was a significant correlation between GPC1 mRNA levels and T beta RII, act-R1a, act-R1b, act-R2a, BMP-R1a, and BMP-R2 mRNA expression in NPT. In contrast, GPC1 mRNA expression correlated directly with act-R1a and BMP-R1a in NO PDAC cases and with act-R2a and BMP-R1a in lymph node positive cases. Down-regulation of GPC1 resulted in increased doubling time in Panc-1 but not in T3M4 cells, and decreased anchorage-independent growth in both cell lines. GPC1 down-regulation resulted in a slightly altered response towards TGF-beta 1, activin-A and BMP-2 in terms of growth, p21 induction and Smad2 phosphorylation. In conclusion, enhanced GPC1 expression correlates with BMP and activin receptors in pancreatic cancer. GPC1 down-regulation suppresses pancreatic cancer cell growth and slightly modifies signaling of members of the TGF-beta family of growth factors
    Type of Publication: Journal article published
    PubMed ID: 17016645
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  • 3
    Keywords: CANCER ; CELLS ; EXPRESSION ; tumor ; TUMOR-CELLS ; carcinoma ; CELL ; Germany ; neoplasms ; DIAGNOSIS ; NEW-YORK ; microarray ; transcription ; TISSUE ; DNA ; MICROARRAY DATA ; MUTATIONS ; Jun ; PHENOTYPE ; vimentin ; HEAD ; adenocarcinoma ; pathology ; BEHAVIOR ; MICROARRAY ANALYSIS ; expression profiling ; TUMOR CELLS ; DIFFERENTIAL-DIAGNOSIS ; CELL CARCINOMA ; OF-THE-LITERATURE ; pancreas ; review ; DUCTAL ADENOCARCINOMA ; AUTOPSY ; analysis ; pancreatic ; TUMOR-CELL ; GENOTYPE ; DNA-MICROARRAY ; USA ; pancreatic ductal adenocarcinoma ; MYOEPITHELIAL CARCINOMA ; pancreatic neoplasm ; PSEUDOPAPILLARY TUMORS
    Abstract: Pancreatic neoplasms have been reliably classified on the basis of their histopathology and immunophenotype. In this study, we report on a pancreatic tumor whose phenotype and genotype could not be assigned to any known tumor entity. The tumor was observed in the pancreatic head of a 54-year-old woman. It was found to be a solid infiltrating carcinoma with abundant clear cells. Apart from cytokeratin, the tumor cells expressed vimentin, S100, and MUC-1. DNA microarray analysis revealed a transcription profile clearly differing from that of normal pancreatic tissue and pancreatic ductal adenocarcinoma. Despite metastatic behavior, the tumor displayed a more favorable course than conventional pancreatic ductal adenocarcinoma. We suggest that this tumor be called solid type clear cell carcinoma of the pancreas
    Type of Publication: Journal article published
    PubMed ID: 17453235
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  • 4
    Keywords: CANCER ; CANCER CELLS ; CELLS ; EXPRESSION ; tumor ; CELL ; Germany ; human ; DISTINCT ; GENES ; HYBRIDIZATION ; PROTEIN ; SAMPLE ; SAMPLES ; transcription ; TISSUE ; TUMORS ; COMPLEX ; COMPLEXES ; primary ; renal ; colon ; RATS ; TISSUES ; CONTRAST ; DOWN-REGULATION ; BREAST ; BREAST-CANCER ; IDENTIFICATION ; IN-SITU ; immunohistochemistry ; MALIGNANCIES ; UP-REGULATION ; BRCA1 ; metastases ; CANCER-CELLS ; COLON-CANCER ; LOCALIZATION ; RT-PCR ; TRACT ; RECEPTORS ; pancreatic cancer ; chronic pancreatitis ; protein expression ; HUMAN TISSUES ; F ; in situ hybridization ; colon cancer ; TGF-BETA ; gastric cancer ; MAC30 ; PRIMARY TUMORS
    Abstract: Meningioma-associated protein, MAC30, is a protein with unknown function and cellular localization that is differentially expressed in certain malignancies. In the present study, the expression of MAC30 in a variety of normal and cancerous human gastrointestinal tissues, with special emphasis on pancreatic tissues was analyzed. Quantitative RT-PCR was utilized to compare MAC30 expression levels. In situ hybridization and immunohistochemistry were carried out to localize MAC30 mRNA and protein expression in normal and cancerous tissue samples of the esophagus, stomach, colon and pancreas. Furthermore, the effects of TGF-beta on the transcription of MAC30 mRNA were examined in pancreatic cancer cells. MAC30 mRNA was expressed in a wide variety of normal human tissues, being most abundant in testicular and gastric tissue samples. MAC30 mRNA levels were significantly increased in breast and colon cancer, but significantly decreased in pancreatic and renal cancer. TGF-beta down-regulated MAC30 mRNA levels in certain pancreatic cancer cells. MAC30 protein was localized in normal pancreatic tissues, mainly in acinar and islet cells, and in normal colon, gastric and esophageal tissues especially in the mucosal cells. MAC30 was strongly present in tubular complexes in pancreatic cancer tissues but weak to absent in pancreatic cancer cells of primary tumors and metastases. In contrast, esophageal, gastric and colon tumors displayed strong MAC30 immunoreactivity in the cancer cells. In conclusion, MAC30 is expressed in various normal and diseased human tissues. MAC30 up-regulation in certain tumors and down-regulation in others suggests that this protein plays a distinct role in human malignancies
    Type of Publication: Journal article published
    PubMed ID: 15375745
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  • 5
    Keywords: APOPTOSIS ; CANCER ; CANCER CELLS ; CELLS ; EXPRESSION ; GROWTH ; INVASION ; proliferation ; SURVIVAL ; tumor ; carcinoma ; CELL-PROLIFERATION ; Germany ; human ; FOLLOW-UP ; DISEASE ; liver ; PROTEIN ; MOLECULES ; TISSUE ; TUMORS ; TIME ; PATIENT ; MARKER ; DONOR ; prognosis ; TISSUES ; MOLECULE ; BREAST-CANCER ; GLYCOPROTEIN ; IDENTIFICATION ; MALIGNANCIES ; METASTASIS ; metastases ; PCR ; CANCER-CELLS ; ADHESION ; MIGRATION ; CANCER-PATIENTS ; adenocarcinoma ; LIVER METASTASES ; CANCER PATIENTS ; HEALTHY ; pancreatic cancer ; chronic pancreatitis ; SERUM ; ELISA ; MALIGNANCY ; RECOMBINANT ; PANCREATIC-CANCER ; TUMOR-GROWTH ; DUCTAL ADENOCARCINOMA ; INCREASE ; extracellular matrix ; REAL-TIME ; cell adhesion ; cell proliferation ; LEVEL ; OSTEOPONTIN ; SERUM-LEVELS ; downregulation ; function ; BLOCKADE ; IMMUNOHISTOCHEMICAL ANALYSIS ; INVASIVENESS ; lymph node ; LYMPH-NODE ; PLASMA OSTEOPONTIN ; restricting ; serum marker
    Abstract: Pancreatic ductal adenocarcinoma ( PDAC) is one of the most aggressive malignancies, with an overall 5-year survival rate of less than 5%. Invasive tumor growth and early metastasis are two important reasons for this dismal prognosis. Osteopontin ( OPN) is a secretory protein with a variety of functions, for example in cell adhesion and migration, inflammatory reaction and apoptosis. In this study the functional role of OPN in human pancreatic cancer and its potential use as a disease marker were analyzed. By real time quantitative PCR, there was a 2.2- fold and 1.6- fold increase of OPN mRNA in pancreatic cancers (n = 23) and chronic pancreatitis samples (n = 22), respectively, compared to normal pancreatic tissues (n = 20). Immunohistochemical analysis demonstrated OPN staining in 60% of the primary pancreatic tumors and in 72% of the lymph node and liver metastases. ELISA analysis of serum samples obtained from pancreatic cancer patients (n = 70), chronic pancreatitis patients (n = 12), and healthy donors (n = 20) showed a 1.6-fold increase in OPN serum levels in patients with tumors and a 1.9-fold increase in patients with chronic pancreatitis. Recombinant human OPN significantly increased the invasiveness of pancreatic cancer cells, without having any impact on cell proliferation. In addition, downregulation of OPN by specific siRNA molecules decreased pancreatic cancer cell invasion. In conclusion, OPN serum levels in pancreatic cancer and chronic pancreatitis patients are not significantly different, thereby restricting its role as a prognostic or follow-up marker. Our results do suggest, however, that blockade of OPN might be useful as a therapeutic approach to inhibit invasion and metastasis of pancreatic cancer cells
    Type of Publication: Journal article published
    PubMed ID: 15970685
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  • 6
    Keywords: CANCER ; CANCER CELLS ; CELLS ; EXPRESSION ; GROWTH ; tumor ; carcinoma ; FACTOR RECEPTOR ; Germany ; GENES ; HYBRIDIZATION ; microarray ; PROTEIN ; TISSUE ; MICE ; TIME ; PATIENT ; COMPLEX ; COMPLEXES ; DONOR ; DOMAIN ; TISSUES ; 5-FLUOROURACIL ; TRANSPORT ; IN-SITU ; LESIONS ; immunohistochemistry ; MALIGNANCIES ; ASSAY ; UP-REGULATION ; PROSTATE-CANCER ; NUDE-MICE ; chemotherapy ; CANCER-CELLS ; LOCALIZATION ; adenocarcinoma ; sensitivity ; CISPLATIN ; MICROARRAY ANALYSIS ; OVEREXPRESSION ; expression profiling ; microdissection ; pancreatic cancer ; REGULATOR ; chronic pancreatitis ; CELL-GROWTH ; in situ hybridization ; MALIGNANCY ; GEMCITABINE ; PANCREATIC-CANCER ; DUCTAL ADENOCARCINOMA ; INCREASE ; independent growth ; TRANSFECTION ; ENHANCED EXPRESSION ; LEVEL ; ASSAYS ; downregulation ; PROLIFERATIVE ACTIVITY ; CHLORIDE ; chloride channel ; COLO-357 CELLS ; DECREASED SURVIVAL ; NA+/K+-ATPASE ; TGF-BETA RESPONSIVENESS ; TGFP
    Abstract: The expression and localization of FXYD domain containing ion transport regulator 3 (FXYD3), a transmembrane protein that acts as a chloride channel or chloride channel regulator, was analyzed in pancreatic tissues derived from donors and patients suffering from chronic pancreatitis (CP) or pancreatic ductal adenocarcinoma (PDAC) as well as in pancreatic cancer cells using QRT-PCR, laser-capture microdissection and microarray analysis, in situ hybridization and immunohistochemistry. FXYD3 antisense expressing T3M4 pancreatic cancer cells were generated and compared to control cells using anchorage-dependent and independent growth assays, and xenotransplantation into nude mice. FXYD3 mRNA levels were 3.4-fold increased in PDAC tissues compared to donor specimens (p = 0.006), and 3.9-fold increased in microdissected cancer cells compared to normal pancreatic ductal cells (p = 0.02). FXYD3 was localized in the tubular complexes and PanIN lesions of both CP and PDAC, as well as in pancreatic cancer cells. Downregulation of FXYD3 by stable antisense transfection increased significantly the doubling time of T3M4 pancreatic cancer cells from 44 +/- 2 hr to 55 +/- 12 hr (p = 0.02). Nude mice transplanted with antisense transfected cells displayed a significant increase in tumor doubling time from 3.3 days +/- 1.0 to 4.3 days +/- 0.43 (p = 0.058). Anchorage-independent growth and sensitivity to 5-fluorouracil, gemcitabine and cisplatin as well as to MgCl2 were not dependent on the level of FXYD3 expression. In conclusion, overexpression of FXYD3 in pancreatic cancer may contribute to the proliferative activity of this malignancy. (c) 2005 Wiley-Liss, Inc
    Type of Publication: Journal article published
    PubMed ID: 16003754
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  • 7
    Keywords: RECEPTOR ; CANCER ; CANCER CELLS ; EXPRESSION ; tumor ; Germany ; DISEASE ; GENE ; GENES ; GENOME ; PROTEIN ; RNA ; TUMORS ; IDENTIFICATION ; LESIONS ; immunohistochemistry ; MICROARRAY DATA ; expression profiling ; pancreatic cancer ; pancreatic carcinoma ; review ; PANCREATIC-CANCER ; DUCTAL ADENOCARCINOMA ; MEDIATED APOPTOSIS ; development ; CYSTIC LESIONS ; pancreatic tumor ; EXPERIMENT ANNOTATIONS ; Fas-activated serine/threonine kinase ; PAPILLARY MUCINOUS NEOPLASMS ; siRNA silencing
    Abstract: Aim: The diversity in the aggressiveness of cystic tumors of the pancreas - ranging from the usually benign serous cystadenoma to lesions of variable degrees of malignancy - was utilized for the identification of molecular factors that are involved in the occurrence of malignancy. Methods: We analyzed the transcript profiles of different cystic tumor types. The results were confirmed at the protein level by immunohistochemistry. Also, functional studies with siRNA silencing were performed. Results: Expression variations at the RNA and protein level were identified that are closely correlated with the degree of malignancy. Besides, all tumors could be classified effectively by this means. Many of the identified factors had not previously been known to be associated with malignant cystic lesions. siRNA silencing of the gene with the most prominent variation - the anti-apoptotic factor FASTK (Fas-activated serine/threonine kinase) - revealed a regulative effect on several genes known to be relevant to the development of tumors. Conclusion: By a molecular analysis of rare types of pancreatic cancer, which are less frequent in terms of disease, variations could be identified that could be critical for the regulation of malignancy and thus relevant to the treatment of also the majority of pancreatic tumors. Copyright (C) 2008 S. Karger AG, Basel and IAP
    Type of Publication: Journal article published
    PubMed ID: 19077453
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  • 8
    Keywords: CANCER ; CANCER CELLS ; EXPRESSION ; tumor ; IN-VIVO ; GENES ; PROTEIN ; DIFFERENTIAL EXPRESSION ; SPARC ; HUMAN PROSTATE ; TARGET GENES ; OSTEOPONTIN ; liver metastasis ; bone sialoprotein ; pancreatic ductal adenocarcinoma ; osteonectin ; Hoxc8 ; HOMEOBOX GENE-EXPRESSION
    Abstract: BACKGROUND: The transcription factor HOXC8 regulates many genes involved in tumour progression. This study was to investigate the role of HOXC8 in pancreatic ductal adenocarcinoma (PDAC) growth and metastasis. METHODS: The Hoxc8 expression was determined in 15 PDAC cell lines and human specimens by RT-polymerase chain reaction and/or immunohistochemistry. The effects of HOXC8 silencing by RNA interference were investigated by functional tests. RESULTS: The Hoxc8 mRNA expression in PDAC cell lines was negatively related to their growth in vivo. Except for Suit2-007 cells, only those with low Hoxc8 mRNA expression grew in nude rats. Successful down-regulation of HOXC8 expression caused increased proliferation, migration (P 〈= 0.05) and colony formation (P 〈= 0.05) in Suit2-007, Panc-1 and MIA PaCa-2 PDAC cells, respectively. The Hoxc8 mRNA levels in diseased human pancreas tissues were significantly increased over normal in PDAC and autoimmune chronic pancreatitis specimens (P〈0.01, respectively), but negatively related to tumour stage (P = 0.09). In primary and metastatic tumour samples, immunohistochemical staining for HOXC8 was stronger in surrounding than in neoplastic tissues. Furthermore, grading of primary carcinomas was negatively associated with HOXC8 staining (P = 0.03). Liver metastases showed the lowest HOXC8 expression of all neoplastic lesions. CONCLUSION: These data indicate that HOXC8 expression is inversely related to PDAC progression and metastasis.
    Type of Publication: Journal article published
    PubMed ID: 21712827
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  • 9
    Keywords: EXPRESSION ; tumor ; carcinoma ; Germany ; NEW-YORK ; GENE ; TISSUE ; TUMORS ; TISSUES ; DELETION ; LESIONS ; MICROARRAY DATA ; MUTATION ; METASTASIS ; inactivation ; MUTATIONS ; HEAD ; adenocarcinoma ; ADENOCARCINOMAS ; beta-catenin ; MICROARRAY ANALYSIS ; point mutation ; CLUSTER ; MASSES ; molecular ; FEATURES ; pancreas ; DUCTAL ADENOCARCINOMA ; ACINAR-CELL-CARCINOMA ; AUTOPSY ; CLUSTER-ANALYSIS ; DPC4/SMAD4 ; p16(INK4A)
    Abstract: An unusual pancreatic tumor with microcystic and tubulopapillary features was observed in a 53-year-old woman. The tumor presented as a large, focally cystic mass in the head of the pancreas, which compressed the surrounding structures. The histological and immunohistochemical analysis revealed a neoplasm that could not be assigned to any of the known pancreatic tumor types. At the molecular level, the tumor showed inactivation of the DPC4/SMAD4 gene, deletion of exon 1 of the p16(INK4A) gene and a point mutation at codon 34 (GGA〉AGA) of beta-catenin. Transcriptional profiling analyses and subsequent correspondence cluster analysis demonstrated that the transcriptional profile of the tumor differed distinctly from that of ductal adenocarcinomas, pancreatic cystic tumors and normal pancreatic tissues. These data suggest that the neoplasm most likely represents a new pancreatic tumor entity, which we would like to refer to as microcystic tubulopapillary tumor
    Type of Publication: Journal article published
    PubMed ID: 15014986
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  • 10
    Keywords: EXPRESSION ; IDENTIFICATION ; fibrosis ; DUCTAL ADENOCARCINOMA ; EXONS ; ALPHA-1(XI) COLLAGEN GENE ; CHONDROGENESIS ; COL11A1 ; FIBROGENESIS ; MARSHALL-SYNDROME
    Abstract: ABSTRACT: BACKGROUND: Tissue fibrosis is an integral component of chronic inflammatory (liver and pancreas) diseases and pancreatic cancer. Activated pancreatic- (PSC) and hepatic- (HSC) stellate cells play a key role in fibrogenesis. To identify organ- and disease-specific stellate cell transcriptional fingerprints, we employed genome-wide transcriptional analysis of primary human PSC and HSC isolated from patients with chronic inflammation or cancer. METHODS: Stellate cells were isolated from patients with chronic pancreatitis (n=6), pancreatic ductal adenocarcinoma (n=5), liver cirrhosis (n=5) and liver metastasis of pancreatic ductal adenocarcinoma (n=6). Genome-wide transcriptional profiles of stellate cells were generated using our 51K human cDNA microarray platform. The identified organ- and disease specific genes were validated by quantitative RT-PCR, immunoblot, ELISA, immunocytochemistry and immunohistochemistry. RESULTS: Expression profiling identified 160 organ- and 89 disease- specific stellate cell transcripts. Collagen type 11a1 (COL11A1) was discovered as a novel PSC specific marker with up to 65-fold higher expression levels in PSC compared to HSC (p〈0.0001). Likewise, the expression of the cytokine CCL2 and the cell adhesion molecule VCAM1 were confined to HSC. PBX1 expression levels tend to be increased in inflammatory- vs. tumor- stellate cells. Intriguingly, tyrosine kinase JAK2 and a member of cell contact-mediated communication CELSR3 were found to be selectively up-regulated in tumor stellate cells. CONCLUSIONS: We identified and validated HSC and PSC specific markers. Moreover, novel target genes of tumor- and inflammation associated stellate cells were discovered. Our data may be instrumental in developing new tailored organ- or disease-specific targeted therapies and stellate cell biomarkers.
    Type of Publication: Journal article published
    PubMed ID: 20416094
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