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Lege Artis Medicinae

MAY 20, 2004

[IDENTIFYING HELICOBACTER PYLORI WITH DNA-BASED ASSAYS]

RUZSOVICS Ágnes, MOLNÁR Béla, TULASSAY Zsolt

[The DNA-based assays have the potential to be a powerful diagnostic tool given its ability to specifically identify H. pylori DNA. Markers used include general H. pylori structures and pathogenetic factors like ureaseA, cagA, vacA, iceA. DNA or bacterial RNA for polymerase chain reaction (PCR) assays can be collected from gastric biopsy, gastric juice, stool, buccal specimens. PCR can yield quantitative and genotyping results with sensitivity and specificity that approaches 100%. A clear trend in the direction of the determination of quantitative H. pylori infection by real-time PCR can be observed. Fluorescent in situ hybridisation (FISH) and restriction fragment length polymorphism (RFLP) are suggested for routine antibiotic resistance determination. To identify the DNA structure of organism and its virulence factors may be feasible by using oligonucleotide microarray specifically recognising and discriminating bacterial DNA and various virulence factors. DNA based H. pylori diagnosis yields higher sensitivity, however, specificity requires sophisticated labour environment and associated with higher costs.]

Lege Artis Medicinae

JANUARY 21, 2004

[A NEW DISCIPLINE IN THE CENTER OF MEDICAL RESEARCH AND CLINICAL PRACTICE - THOUGHTS ON BIOINFORMATICS]

FALUS ANDRÁS, BERKE Tamás, ORTUTAY Csaba Péter, SUHAI György

[Bioinformatics is one of the most important element of genomic research revolutionising biomedical science. This review describes the phenomena of genomic variance and comparative genomics. Briefly, the review summarises the identification procedure of new genes and gene expression patterns highly important in diagnostics. Bioinformatic procedures make possible the rapid detection of pathogens and have principal role in molecular drug design technologies.]

Lege Artis Medicinae

JULY 20, 2002

[Functional genomics - Potentials, hopes, and post genomic realism]

FALUS ANDRÁS, SZALAI Csaba, TÓTH Sára

[This paper provides an overview on major elements of the age of genomics: including the human genome programme, principles of gene chip technology and data management by bioinformatics. The manuscript provides examples from the fields of oncology, infectology and allergy. The possibility of ”in silico” research on computers is also presented with the shadows of the post-genomic era and the significance of changes in the biomedical paradigm.]