Peptides in the Treatment of Gastric Ulcer.

A promising area in the search for effective and safe methods of pharmacotherapy for gastric ulcers is the study of bioactive substances of natural origin and derivatives synthesized on the basis of these substances. The review presents modern information on various peptide-based substances that are pharmacologically active against gastric ulcer, including analogues of natural neuropeptides, synthetic substances with a specific amino acid sequence, as well as drugs derived from biological peptide complexes. Based on the results of the analysis, we have assessed the prospects of this pharmacological approach and outlined the areas for further research.

Mechanical retardation of actinide-bearing colloid migration from an underground repository: Theory and experiment.

A necessary condition for the sustainable development of nuclear power is the safe disposal of vitrified high-level radioactive waste from the processing of spent nuclear fuel in underground repositories. Their safety depends on the rate of radionuclide transport by groundwater from the repository to the biosphere. A significant fraction of the radionuclides is carried by groundwater in colloidal form.

Preparation of Antimicrobial Agents: From Interpolyelectrolyte Complexes to Silver-Containing Metal-Polymer Complexes and Nanocomposites.

In order to control pathogenic microorganisms, three polymer compositions were prepared and tested. First, a water-soluble positively charged polycomplex was synthesized via the electrostatic binding of anionic polyacrylic acid to an excess of polyethylenimine to enhance the biocidal activity of the polycation. Second, an aqueous solution of AgNO was added to the polycomplex, thus forming a ternary polycation-polyanion-Ag complex with an additional antimicrobial effect.

Transient exposure to rotenone causes degeneration and progressive parkinsonian motor deficits, neuroinflammation, and synucleinopathy.

Individuals with Parkinson's disease (PD) typically receive a diagnosis once they have developed motor symptoms, at which point there is already significant loss of substantia nigra dopamine neurons, α-synuclein accumulation in surviving neurons, and neuroinflammation. Consequently, the point of clinical presentation may be too late to initiate disease-modifying therapy. In contrast to this clinical reality, animal models often involve acute neurodegeneration and potential therapies are tested concurrently or shortly after the pathogenic insult has begun rather than later when diagnostic clinical symptoms emerge.

Effect of Carnosine on the Activity of Matrix Metalloproteinase-2 and Oxidative Stress in the Kidneys in Experimental Urate Nephrolithiasis.

The effect of carnosine on MMP-2 activity and oxidative stress in the kidneys in experimental urate nephrolithiasis was studied. Urate nephrolithiasis was modeled in Wistar rats by intragastric administration of a mixture of oxonic and uric acids. Carnosine was administered intragastrically through a tube in a dose of 15 mg/kg.