Péter Tátrai

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Heparan sulfate (HS), due to its ability to interact with a multitude of HS-binding factors, is involved in a variety of physiological and pathological processes. Remarkably diverse fine structure of HS, shaped by non-exhaustive enzymatic modifications, influences the interaction of HS with its partners. Here we characterized the HS profile of normal human(More)
Claudins, known as major contributors in the formation of the tight junction, are differentially expressed in malignant tumors as compared to the corresponding healthy tissues. Therefore, they are thought to play a role in carcinogenesis and tumor progression. Altered expression of claudin-1 has been reported in several tumor types including endometrial,(More)
Enhancer of zeste homologue 2 (EZH2) is a polycomb group (PcG) family protein. Acting as a histone methyltransferase it plays crucial roles in maintaining epigenetic stem cell signature, while its deregulation leads to tumor development. EZH2 overexpression is commonly associated with poor prognosis in a variety of tumor types including carcinomas,(More)
Biliary tract cancers are relatively common malignant gastrointestinal tumors in the elderly. Claudins are integral components of tight junctions that play important roles in maintaining epithelial cell polarity, controlling paracellular diffusion, and regulating cell growth and differentiation. The expression profile of claudins has been extensively(More)
OBJECTIVE In this study, we investigated the presence of high-risk (HR) HPV types most prevalent in the Hungarian population in surgically removed cervical cancers and pelvic lymph nodes. The aim of our work was to determine the prognostic significance of HPV status in the lymph nodes draining the tumor. METHODS Primary tumor specimens from 150 patients(More)
Syndecan-1, a transmembrane proteoglycan, may exert anti-proliferative effects and promote cell growth by binding various growth factors. Malignant epithelial cells often down-regulate their own syndecan-1 production, and are capable of inducing an aberrant syndecan-1 expression in stromal fibroid cells. Decreased tumor cell syndecan-1 levels in human head(More)
In our earlier work, we demonstrated that agrin, a multifunctional heparan sulfate proteoglycan, accumulates in hepatocellular carcinoma (HCC) and cholangiocellular carcinoma (CCC). In addition, we proved the utility of agrin immumohistochemistry in discriminating between HCCs and benign parenchymal lesions. Here, we have examined the expression of agrin in(More)
Numerical centrosome aberrations underlie certain developmental abnormalities and may promote cancer. A cell maintains normal centrosome numbers by coupling centrosome duplication with segregation, which is achieved through sustained association of each centrosome with a mitotic spindle pole. Although the microcephaly- and primordial dwarfism-linked(More)
Human papillomavirus (HPV) is known as a strictly epitheliotropic pathogen. Our results raised the possibility that HPV 16 is present in neural cells and in the vascular endothelium. By in situ hybridization, we have detected HPV 16 E6 ORF sequence in small blood vessels and peripheral nerves adjacent to oral and cervical cancers. The same structures have(More)
Agrin is a recently identified proteoglycan component of vascular and bile duct basement membranes in the liver. The selective deposition of agrin in hepatocellular carcinoma (HCC) microvessels versus sinusoidal walls prompted us to investigate the utility of agrin immunohistochemistry (IHC) in detecting malignant hepatocellular lesions. We focused on the(More)