The method of capillary electrophoresis for quantitative determination of hydrophobized hyaluronic acid in its micellar forms.

Micelles based on hydrophobized hyaluronic acid (HA) are frequently used in targeted drug delivery systems. Capillary zone electrophoresis (CZE) was utilized for the quantitative determination of hydrophobized and native HA. A universal methodology was developed, suitable for the quantitative analysis of amphiphilic derivatives of hyaluronan (oleyl hyaluronan and hyaluronan conjugate with naphthalimide fluorophore) and native HA with varying molecular weights (15, 150, and 800 kDa). Furthermore, methodologies were proposed for the simultaneous quantification of a drug substance and oleyl hyaluronan in micellar forms based on the latter. The CE technique was applied for analyzing oleyl-hyaluronan-based micellar forms of two poorly soluble drug substances with oppositely charged ionic forms (loperamide and rifabutin). The examples contained in the study demonstrate a range of analytical sensitivity (LOD) for hyaluronan from 11 to 40 µg/mL and for the drug substance from 0.4 to 0.6 µg/mL. The study also showcases the accurate quantitative determination of rifabutin and loperamide in oleyl-hyaluronan-based micellar forms without the need for sample preparation. Thus, the proposed methodologies can be used to quantify native HA or its amphiphilic derivatives and simultaneously determine drug substances of various nature.

[Phenotypes of patients with chronic obstructive pulmonary disease].

AIM: To study characteristics of phenotypes of chronic obstructive pulmonary disease (COPD) basing on the findings of modern clinical, functional and roentgenomorphological tests in the course of the disease. MATERIAL AND METHODS: Basing on the results of high performance computed tomography, 64 COPD patients aged 46-75 years (FEV1 51 +/- 24%) were divided into two groups: 53 patients with emphysematous phenotype (group 1) and 11 patients with bronchytic phenotype (group 2). The groups were compared by constitutional, clinical, functional and roentgenological parameters. RESULTS: Group 1 patients had significantly less body mass index, more severe edema by Borg's scale, low FEV1, FEV1/FLC, diffuse lung capacity and lung tissue density compared to group 2. Bronchoectases occurred more frequently in group 1 (33 and 9%, respectively). CONCLUSION: Heterogenous COPD phenotypes differ not only at the stage of chronic respiratory insufficiency but also at all stages of the disease.

[Herpes simplex infection in newborn infants]. / Kherpes simpleks infektsiia u novorodeni detsa.

Six cases of proven herpes simplex infection in newborn babies are reported. Different clinical forms are observed: three babies with multisystem disease that attacked viscera and other three with central nervous system localisation. All six mothers have negative history for being carrier of herpes simplex virus. The babies are treated with Herpesbulin, Pandavir and Zovirax. One of them died with meningoencephalitis. The outcome at the age of three months after birth of the other 5 babies is: 2 babies are healthy, three developed late sequelae.