Polymer-Stabilized Elemental Boron Nanoparticles for Boron Neutron Capture Therapy: Initial Irradiation Experiments.

Sufficient boron-10 isotope (B) accumulation by tumor cells is one of the main requirements for successful boron neutron capture therapy (BNCT). The inability of the clinically registered B-containing borophenylalanine (BPA) to maintain a high boron tumor concentration during neutron irradiation after a single injection has been partially solved by its continuous infusion; however, its lack of persistence has driven the development of new compounds that overcome the imperfections of BPA. We propose using elemental boron nanoparticles (eBNPs) synthesized by cascade ultrasonic dispersion and destruction of elemental boron microparticles and stabilized with hydroxyethylcellulose (HEC) as a core component of a novel boron drug for BNCT.

Polycomplexes of Hyaluronic Acid and Borates in a Solid State and Solution: Synthesis, Characterization and Perspectives of Application in Boron Neutron Capture Therapy.

In this report, we propose a new polyborate fragment synthesis strategy along the whole chain of the polysaccharide hyaluronic acid (HA) to produce boron neutron capture therapy (BNCT) compounds. Under high pressure and deformatory solid-state conditions, polymolecular system formation takes place due to association of phase-specific transition components into a more or less distinct microscopic organization. Fourier transform infrared (FTIR) spectroscopy shows that HA and polyborates form a network of cyclic polychelate complexes.

[Biodegradablescaffolds based on chitosan: Preparation, properties, and use for the cultivation of animal cells].

The influence of the conditions of the formation of chitosan hydrogels crosslinked with glutaraldehyde (GA) or genipin (the polysaccharide molecular weight, pH level, and concentration of the chitosan solution) on the gel time and the properties of biopolymer scaffolds for tissue engineering obtained by the freeze-drying of hydrogels was studied. The resulting scaffolds had different structures (morphology, degree of anisotropy, average pore size) and moisture-retaining capacities. The cytotoxicity of biodegradable scaffolds based on chitosan with a low content of genipin and GA was studied for the first time.

Hyaluronic acid as a potential boron carrier for BNCT: Preliminary evaluation.

Hyaluronic acid (HA), a nonimmunogenic, biocompatible polymer found in different biological tissues, has the potential to attach to CD44 receptors on the surface of certain cancer cells, where the receptor is overexpressed compared with normal cells. Boron-hyaluronic acid (BHA) was tested for its feasibility as a potential agent for BNCT. BHA with low-viscosity 30 kDa HA could be administered by intravenous injection.

[Antioxidant effects of vetoron in flying personnel with arterial hypertension].

The purpose of the investigation was to assess the possibility to control free radical oxidation in patients with cardiovascular pathologies with the help of vetoron. This was the first attempt to study effects of a beta-carotene (vetoron) on lipid peroxidation and the activity of antioxidant defense enzymes in flying personnel with cardiovascular pathologies (hypertension and neurocirculatory dystonia). Therapeutic effect of the medicament was evaluated by its action on peroxide metabolism (malonic dialdehyde, acyl hydroperoxides and trien conjugates, Schiff bases) and stimulation of the antioxidant defense enzymes (catalase and glutathione reductase).

[Endoscopic peroral pancreatico-cholangioscopy in the diagnosis of diseases of bile ducts and the pancreas].

Till nowadays the diagnosis of biliary and pancreatic ducts disorders remains to be rather difficult. Cholangioscopy is the only method, that gives an opportunity of visual evaluation of the ducts. The results of 234 retrograde peroral pancreatico-cholangioscopies (RPCS) in 149 patients are analysed.