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Research Database PMU-SQQUID

Detection of bladder cancer from the urine using fluorescence in situ hybridization technique.
Riesz, P; Lotz, G; Paska, C; Szendrol, A; Majoros, A; Nemeth, Z; Torzsok, P; Szarvas, T; Kovalszky, I; Schaff, Z; Schaff, I; Romics, I; Kiss, A
Pathol Oncol Res. 2007; 13(3):187-194
Originalarbeiten (Zeitschrift)


Törzsök Peter


Claudins have been reported to be differentially regulated in malignancies and implicated in the process of carcinogenesis and tumor progression. Claudin-1 has been described as key factor in the entry of hepatitis C virus (HCV) into hepatocytes and as promoter of epithelial-mesenchymal transition in liver cells. The objective of the current study was to characterize claudin expression in hepatocellular carcinoma (HCC) as well as HCC-surrounding and normal liver samples with respect to cirrhosis and HCV infection. Expression of claudin-1, -2, -3, -4, and -7 was measured by morphometric analysis of immunohistochemistry, and Western blotting in 30 HCCs with 30 corresponding non-tumorous tissues and 6 normal livers. Claudin-1 and -7 protein expression was found significantly elevated in cirrhosis when compared with non-cirrhotic liver. HCCs developed in cirrhotic livers showed even higher expression of claudin-1 contrary to decreased claudin-7 expression when compared with cirrhosis. With reference to HCV status, HCCs or surrounding livers of HCV-infected samples did not show significant alterations in claudin expression when compared with HCV-negative specimens. Cirrhotic transformation associates with elevated claudin-1 and -7 expressions in both non-tumorous liver and HCC. The fact that no significant differences in claudin expression were found regarding HCV-positivity in our sample set suggests that HCV infection alone does not induce a major increase in the total amount of its entry co-factor claudin-1. Increased expression of claudin-1 seems to be a consequence of cirrhotic transformation and might contribute to a more effective HCV entry and malignant transformation.

Useful keywords (using NLM MeSH Indexing)

Case-Control Studies

Chromosome Aberrations

Chromosomes, Human, Pair 17

Chromosomes, Human, Pair 3

Chromosomes, Human, Pair 7


Diagnosis, Differential


In Situ Hybridization, Fluorescence/methods*

Sensitivity and Specificity

Urinary Bladder Diseases/diagnosis

Urinary Bladder Diseases/pathology

Urinary Bladder Neoplasms/diagnosis*

Urinary Bladder Neoplasms/pathology*



Find related publications in this database (Keywords)

bladder cancer
fluorescence in situ hybridization
molecular pathology