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The aim of this review is to explain fundamentals of DNA microarray technique and indicate possibilities of its use in veterinary sciences. DNA microarray technology is a powerful tool for functional and structural genomics. It allows the analysis of an entire genome expression (transcriptomic profile) on one glass or plastic slide in a short period of time. It gives the opportunity to establish genes expression patterns characteristic for different physiological and pathological conditions and allows its use as a diagnostic tool. The use of expression microarrays gives the possibility to examine the influence of new treatment strategies in particular diseases and enables the assessment of advantages and disadvantages of this type of therapy. It also allows finding new targets (key proteins, enzymes) for newly developed drugs and makes possible the adaptation of a drug therapy to individual patients. By using DNA microarray technique it is possible to make a new hypothesis and to validate current ones. In this review the origin of the DNA microarray technique, its molecular basics, different kinds of microarray slides and analysis platform as well as the methodology of labeling and hybridization were described. This review may be very useful for people who are planning to use or are have already begun using DNA microarray technique.
Campylobacter spp, gramnegative microorganisms, are currently recognized as a major cause of human acute bacterial enteritis. This bacterium frequently promotes a commensal lifestyle in the gastrointestinal tracts of many animals including birds. The main route of human infections is through improperly handled or undercooked poultry meat. This review article intends to present up-to-date research regarding knowledge of how the bacterium establishes commensalism. To date only a few genes that apparently contribute to avian-gut colonization have been identified by standard genetic techniques such as isogenic mutant construction by gene replacement methodology. The post-genomic era has resulted in new instruments for analyzing virulence and commensalism-related mechanisms. The review outlines some currently conducted Campylobacter transcriptome and proteome analyses aimed at the explanation of the adaptation of the bacterium to different environments. The last part of the review concentrates on mechanisms which regulate the chicken gut colonization process, mainly the new, recently described, two-component signal transduction systems.
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