Publications by authors named "S I Kovalchuk"

Introduction: WhiA is a conserved protein found in numerous bacteria. It consists of an HTH DNA-binding domain linked with a homing endonuclease (HEN) domain. WhiA is one of the most conserved transcription factors in reduced bacteria of the class Mollicutes.

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Puromycin (Puro) is a natural aminonucleoside antibiotic that inhibits protein synthesis by its incorporation into elongating peptide chains. The unique mechanism of Puro finds diverse applications in molecular biology, including the selection of genetically engineered cell lines, in situ protein synthesis monitoring, and studying ribosome functions. However, the key step of Puro biosynthesis remains enigmatic.

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Article Synopsis
  • The study focuses on the role of mobile genetic elements in spreading biocide and antibiotic resistance among bacteria, specifically the qacEΔ1 gene that provides resistance to quaternary ammonium compounds (QACs).
  • Researchers developed a TaqMan real-time PCR assay to detect the qacEΔ1 gene in Gram-negative bacteria, which can accurately identify even low quantities (as few as 80 copies) without false results.
  • This assay serves as a rapid, sensitive, and specific method for monitoring QAC resistance, tracking the spread of class 1 integrons, and predicting multidrug-resistant (MDR) traits in Gram-negative bacteria.
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Adhesive-invasive has been suggested to be associated with the development of Crohn's disease (CD). It is assumed that they can provoke the onset of the inflammatory process as a result of the invasion of intestinal epithelial cells and then, due to survival inside macrophages and dendritic cells, stimulate chronic inflammation. In previous reports, we have shown that passage of the CD isolate ZvL2 on minimal medium M9 supplemented with sodium propionate (PA) as a carbon source stimulates and inhibits the adherent-invasive properties and the ability to survive in macrophages.

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Concern has emerged about the prevalence of second cancers among patients with hairy cell leukemia (HCL) treated with purine analogs. We investigated 513 patients with HCL treated with cladribine over the last 30 years at 18 Italian centers and calculated their standardized incidence ratios (SIRs). We identified 24 patients with a second cancer diagnosed at a median time from treatment with cladribine of 59.

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