Chitosan/Poly(2-ethyl-2-oxazoline) films with ciprofloxacin for application in vaginal drug delivery

Chitosan (CHI) and chitosan/poly(2-ethyl-2-oxazoline) (CHI/POZ)-based films were prepared by casting from aqueous solutions of polymer blends with different compositions. Ciprofloxacin was used as a model drug in these formulations. The weight, thickness, folding endurance and transparency of blend films were measured and characterised. All films had a uniform thickness (0.06 ± 0.01 mm) and exhibited sufficient flexibility. The surface pHs of films ranged from 3.76 ± 0.49 to 4.14 ± 0.32, which is within the pH range suitable for vaginal applications. The cumulative release of the drug from the films in experiments in vitro was found to be 42 ± 2% and 56 ± 1% for pure CHI and CHI/POZ (40:60) films, respectively. Drug-free chitosan/poly(2-ethyl-2-oxazoline) films showed weak antimicrobial activity against Escherichia coli. Drug-loaded CHI and CHI/POZ films showed good antimicrobial properties against both Gram-positive Staphylococcus aureus and Gram-negative bacteria Escherichia coli. Mucoadhesive properties of these films with respect to freshly excised sheep vaginal mucosa were evaluated using a tensile method. It was established that all films were mucoadhesive, but an increase in POZ content in the blend resulted in a gradual reduction of their ability to stick to vaginal mucosa. These films could potentially find applications in vaginal drug delivery

Screening mutation in RYR2 gene in a Kazakhstani idiopathic ventricular tachycardia study cohort: two novel mutations

The human ryanodine receptor 2 (RYR2) is one of the key players tightly regulating calcium efflux from the sarcoplasmic reticulum to the cytosol and found frequently mutated (<60%) in context of catecholaminergic polymorphic ventricular tachycardia (CPVT1) [1]

A targeted sequencing reveal overlapping pattern of genetic variants in patients with cardiomyopathy with cardiac arrhythmias in Kazakhstan

Ventricular tachycardia (VT) is a common symptom in cardiac disorders of different etiology. Abnormalities of ion channels are attributed to mutations in the genes encoding the channel protein and cause altered function of channels, which can predispose to arrhythmias. Due to the high incidence of cardiovascular disorders in Kazakhstan, we enrolled a study cohort of 95 patients of different clinical phenotypes of cardiomyopathies, including DCM, idiopathic VT but also patients with myocardial infarction as a consequence of coronary heart disease. The common denominator among the three main groups was the occurrence of severe episodes of VT in all patients. Using targeted resequencing, we investigated 96 cardiomyopathy associated candidate-genes in this cohort with the aim to detect rare and common variations in these genes associated with VT molecular basi

An association between TRP64ARG polymorphism of the B3 adrenoreceptor gene and some metabolic disturbances

<p>Abstract</p> <p>Backgrounds</p> <p>B3 adrenoreceptors (ADRB3) are abundant in adipose tissue and play the role in its metabolism and lipolysis. Some variants of the ADRB3 gene may predispose subjects for the development obesity and metabolic abnormalities in the setting of modern sedentary lifestyle. ADRB3 gene polymorphism association with metabolic disturbances has never been studied before in the ethnic Kyrgyz population.</p> <p>Aim</p> <p>To study an association between Trp64Arg polymorphism of the ADRB3 and metabolic syndrome (MS) components in an ethnic Kyrgyz group.</p> <p>Materials and methods</p> <p>213 Ethnic Kyrgyz volunteers over the age of 30 were enrolled in the study. The assessment plan for each individual comprised of general physical and anthropometric exams as well as laboratory tests (glucose, lipid panel, insulin) and genotyping by Trp64Arg polymorphism of the ADRB3. MS diagnosis was consistent with modified ATP III criteria (2005). Logistic regression analysis was performed to test the potential independent association between Arg64 allele with obesity, abdominal obesity (AO) and arterial hypertension (AH).</p> <p>Results</p> <p>Trp64Arg polymorphism of the ADRB3 was assessed in 213 individuals (145 men, 68 women) aged 30-73 (mean age 50.7 ± 7.6). Arg64 allele frequency was 0.239; ADRB3 genotype distribution among participants was: Trp64 homozygotes 54.5%, Trp64Arg 43.2% and Arg64 homozygotes 2.3%. There was an association between Trp64Arg и Arg64Arg genotypes and higher BMI, WC and obesity frequency (p < 0.00009), AO (p < 0.01), type 2 diabetes mellitus (DM) (p < 0.005) and lower high density cholesterol (HDL-C) level (p < 0.03). The logistic regression analysis showed the correlation of the Arg64 allele with obesity (OR 3.159; 95% CI 1.789-5.577) and AO (OR 1.973; 95% CI 1.118-3.481). The association between Arg64 allele and AH lost its significance after adjustment for obesity.</p> <p>Conclusion</p> <p>Arg64 allele of the ADRB3 gene in the studied group has an association with MS components such as obesity, AO and decreased HDL-C level.</p

Association of vitamin D receptor (FOKI, TAQI, APAI & BSMI) and IF-y genes' polymorphisms with risk of developing pulmonary TB (PTB) among Kazakhstani population

Almost one third of the world's population is infected with Mycobacterium tuberculosis (MTB) and only 10% of them will develop any active form of the disease. TB is second (1s t is HIV/AIDS) greatest killer worldwide due to a single infectious agent. In 2012, 8.6 million people developed active TB and 1.3 million died. Over 95% of TB deaths occur in developing countries. In 2012, an estimated more than half million children became ill with TB and 74 000 of them died. The TB cases are declining annually, but very slowly. Multi-drug resistant TB (MDR-TB) and extensively drug-resistant tuberculosis (XDRTB) is present in almost all surveyed countries. Kazakhstan is not highly burdened by TB. Kazakhstan is the list of MDR-TB and XDR-TB burden countries. Our aim is to investigate an association of Vitamin D receptor (FokI, TaqI, ApaI & BsmI) and IF-y genes" polymorphisms with risk of developing pulmonary TB (PTB) among Kazakhstani population

Whole genome sequencing of mycobacterium tuberculosis in Kazakhstan: first sequence results of two clinical isolates

The project is aimed to create the prerequisites for a personalized approach to the diagnosis and treatment of tuberculosis (TB) by identifying and comparing the whole genome sequences of M.tuberculosis strains isolated in Kazakhstan. Analysis for whole genome sequences obtained using the next generation sequencing technology will clarify the factors cause of the formation of highly virulent strains of M.tuberculosis, the evolution of local strains, and genetic markers of drug resistance

Exploring the Technology of Gluten-Free Bread

The article presents the main properties and characteristics of amaranth, flax, rice, buckwheat flour, as well as the results of obtaining gluten-free bread based on combined flour. The physicochemical properties of the combined flour have been determined and the formulation of gluten-free bakery products has been developed. The technology of gluten-free bakery products based on combined flour has been improved. The general patterns of changes in the nutritional value of a new product have been studied. Feeding patients with gluten intolerance, improving the adequacy of treatment, improving the quality of life of the patient and his family. The article is devoted to the expansion of the range and development of bakery products. Studies have confirmed the absence of toxicity of amaranth for patients with celiac disease, as well as a review of the physico-chemical parameters of amaranth, buckwheat, flax and rice flour, percentages of the content of substances necessary for the human body. This summary information is used in further research to develop special gluten-free bakery products with combined flour. The general patterns of changes in the nutritional value of a new product have been studied. Baking work was carried out practically. As a result, it was found that sample No. 3 meets the requirements of gluten-free bread. The color of the samples was uniform, the surface color was brown, soft, porous, breadcrumbs were elastic, odorless, and the taste harmoniously fit into gluten-free bread. Bread meets the requirements of the current regulatory documents

Comparison of different classification of metabolic syndrome in the Kyrgyz ethnic group

Goal: Comparison of different classification of metabolic syndrome (MS) in Kyrgyz ethnic group. Materials and methods: 183 women, 140 men of the ethnic Kyrgyz, mean age 52,5 ± 8,5 years, were included in the study. Clinical examination, blood pressure, anthropometric data (weight, height, waist circumference, hip circumference), measurament, the analiysis of fasting glucose, lipid profile, insulin were perfomed in all examined persons. Diagnosis of MS was made using the criteria of ATP III (2005), IDF for European and asian populations (2005), Russian criteria (2009) and criteria of MS IDF and AHA / NHLBI (2009). Results: The sensitivity of detection of insulin resistance (IR) was high enough and did not differ significantly between the diagnostic criteria. The highest specificity 0,77 (0,72-0,83) occurred when criteria ATP III was used. The difference of specificity was close to significant between criterias of ATP III and IDF criteria for Asian populations and criteria MS IDF and AHA / NHLBI (2009), and reached statistical significance between the parameters of the ATP III, and Russian criteria. Conclusion: Based on these data, in Kyrgyz ethnic group for diagnosis of MS is preferebale the use of ATP III criteria

Chitosan/poly(2-ethyl-2-oxazoline) films for ocular drug delivery: Formulation, miscibility, in vitro and in vivo studies

Polymeric films were prepared based on chitosan and its blends with poly(2-ethyl-2-oxazoline) by casting from aqueous solutions. These materials were characterised using a number of physicochemical techniques, including Fourier-transform infrared spectroscopy, thermal gravimetric analysis, differential scanning calorimetry, wide angle x-ray diffraction, tensile testing and scanning electron microscopy. All these studies indicate that there is a weak intermacromolecular hydrogen bonding between these polymers, which facilitates their complete miscibility in solid state. These films were formulated with sodium fluorescein as a model drug and were evaluated for their potential application in ocular drug delivery both in vitro and in vivo. It was established that the films are biocompatible and mucoadhesive; they are capable of providing a sustained drug release when administered topically on the cornea