Background The present study reports the antibacterial potential of phyto-nano-hybrid particles Ag-CuO (silver-copper oxide) against drug-resistant pathogens isolated from a Russian hospital in Krasnoyarsk, Siberia. The synthesis of nano-hybrid was achieved by phytogenic source by using leaves of Murraya koenigii. The nano-hybrid particles were well characterized using hyphenated techniques and results of the antibacterial assay was tabulated. Results The UV-visible spectra displayed absorption at 420 nm with the shoulder peak at 355 nm indicating the hybridization. The FTIR analysis revealed the presence of phenol, amine, methyl, carbohydrate and aromatic as major functional groups. The XRD analysis revealed the presence of Bragg’s intensities at 2 theta angle depicting the crystalline nature of Ag-CuO nano-hybrid. The TEM analysis displayed the polydispered properties of Ag-CuO nano-hybrid with the size in the range of 60–80 nm exhibiting different shapes ranging from spherical, rod and oval. The antibacterial activity of Ag-CuO nano-hybrid was tested against multidrug-resistant pathogens that resulted in highest activity against P. aeruginosa strain with an inhibition zone of 14 mm in diameter. The MIC concentrations ranged from 0.3125 to 2.5 μg/ml and broth dilution assay displayed dose-dependent properties of Ag-CuO nano-hybrid particles. Conclusion The obtained results are interesting to report the preliminary insight to develop biocompatible hybrid particles to combat drug-resistant pathogens. The developed nano-hybrid particles displayed activity against all the test pathogens investigated against both Gram-positive and Gram-negative bacteria. Thus, the study forms preliminary investigation to report nano-hybrid particles as broad spectrum antibacterial agents.

Inhibition of the apical sodium-dependent bile acid transporter (ASBT, also known as IBAT — ileal bile acid transporter, SLC10A2) leads to disruption of the enterohepatic circulation of bile acids and their excretion with fecal masses. This is accompanied by cholesterol utilization for synthesis of new bile acids. ASBT inhibitors are promising drugs for the treatment of such diseases as non-alcoholic fatty liver disease, non-alcoholic steatohepatitis, type 2 diabetes mellitus, necrotic enterocolitis, chronic constipation, atherosclerosis. To date the most known chemically synthesized inhibitors are: A3309, SHP626, A4250, 264W94, GSK2330672, SC-435. All of them are at different stages of clinical trials, which confirm the high efficacy and good tolerance of these inhibitors. Current trends in this field also include directed chemical synthesis of ASBT inhibitors, as well as their search among substances of plant origin.

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Introduction. Rhinosinusitis polyposa consists in a chronic inflammation of the mucous membrane of the nose and paranasal sinuses, followed by recurrent growth of polyps and characterised by a high prevalence. Nasal polyps may be associated with the presence of viscous mucin; their characteristic CT signs are hyperostosis of the walls of the affected sinuses and thinning cavity walls until the bone is destroyed, this being a sign of aseptic osteomyelitis. The same sign is typical for inverted papilloma, the most common benign tumour of the nose and sinuses.Materials and methods. The present article presents a clinical observation. What makes it interesting is that a benign tumour was diagnosed against the background of bilateral rhinosinusitis polyposa. The clinical picture did not have nasal bleeding, which is typical for inverted papilloma; this was most likely due to the initial growth of the tumour. Thickening bone structures (hyperostosis) was balanced due to the pathogenetic peculiarities of the rhinosinusitis polyposa development with viscous mucin. Inverted papilloma was suspected during rhinoscopy, which revealed asymmetric growth of polyps. Final verification of the clinical diagnosis was carried out following computerised tomography of the nose and paranasal sinuses and histological examination of biopsy material.Results and discussion. This clinical case is of interest due to rhinocytogram data suggesting a viral and inflammatory etiology of the development of inverted papilloma. Therefore, the observed nucleoli of the nuclei of the columnar epithelium are characteristic of intracellular infection — in particular, viral. Remodelling of cells of the cylindrical epithelium is a sign of chronic inflammatory process.Conclusion. Thus, accurate performance of the diagnostic algorithm with histological verification of all removed material allows the identification of a neoplasm of the nasal cavity even in difficult cases, along with other diseases of the nasal cavity. Rhinocytogram data can help suggest the etiology of the intracellular type of infection in the epithelial cell and pathogenesis of inverted papilloma in a particular case.