[Endoscopic methods for the correction of ureteral strictures].

The comprehensive examination and treatment of 80 patients aged 19 to 63 years with strictures of the ureteropelvic junction (UPJ) and ureter obstruction was performed. 23 patients underwent probing with ureteral stenting, 30 patients underwent balloon dilation of strictures under fluoroscopic guidance, 18 patients--endoureteropielotomy with "cold" knife, 9 patients underwent endoureteropielotomy using holmium laser. Correction of ureteral stricture with the removal of the stone was performed in 6 patients.

[Epigenetic aspects of peptide regulation of aging].

Endogenous short peptides presented in the cyto- and nucleoplasm, are products of specific proteolysis of nuclear proteins in the proteasome. They are short blocks in sequence of amino acid residues with charged side groups and are characterized by a high local concentration of electrostatic charges of opposite signs. The peptides are capable of complementarily binding to specific short sequences of nucleotides in DNA strands.