Natalia Khokhlenkova

Dr. Natalia Khokhlenkova

orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 August 2017 in Asian Journal of Pharmaceutical and Clinical Research
Verified
Journal Article
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NKNatalia Khokhlenkova
Natalia Khokhlenkova
KSKovalenko Sm
Kovalenko Sm
AJAzarenko Jm
Azarenko Jm
BMBuryak Mv
Buryak Mv
The results of modern research on the creation of pharmacologically active bandage were generalized. The main components of the development of pharmacologically active dressing (choice of active ingredients, carrier substrate, the method of immobilization, etc.) were determined. Methodological approaches to the creation of pharmacologically active bandage were developed. The practical significance of the developed methodological approaches demonstrated by research and development of dressings with thick oak bark extract.

27 November 2024 in News of Pharmacy
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Journal Article
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OKO. S. Kaliuzhnaia
O. S. Kaliuzhnaia
NKNatalia Khokhlenkova
Natalia Khokhlenkova
MPM. V. Panenko
M. V. Panenko
Aim. To analyze current trends in insulin production and expression systems used to obtain recombinant proteins. Materials and methods. The specified goal was achieved using the methods of content analysis, comparative, logical, analytical and generalization of information. The research materials were publications in scientific periodicals, official websites of manufacturing companies. Results. It has been found that the following expression systems are traditionally used for the commercial production of recombinant human insulins: bacterial – Escherichia coli, and yeast – Saccharomyces cerevisiae. But to meet the global need for insulin, it is necessary to develop new effective expression systems. Therefore, the use of other eukaryotic insulin expression systems that would be suitable for large-scale production is currently being studied. Among such systems, transgenic plants, which are characterized by the absence of potential human pathogens and the presence of post-translational protein modification mechanisms similar to human ones, are promising for introduction into insulin production. Currently, studies using Arabidopsis thaliana, tobacco, lettuce and strawberry plants are successful. Stem cells – embryonic, mesenchymal and induced pluripotent are also considered promising. The methods used in the large-scale production of recombinant insulin based on the synthesis of proinsulin and the two-chain method have been characterized. The technological flowcharts of both technologies have been drawn up, the advantages and disadvantages of each are given. Conclusions. The analysis of data from the scientific literature has shown that the main methods of producing insulin preparations since the 1980s remain pro-insulin and two-chain methods, which are based on recombinant DNA technologies. The pro-insulin method is considered more efficient and cost-effective compared to the two-chain method since this technology consists of working with a single recombinant strain. The choice between these two methods depends on the specific needs of the manufacturer: for some cases a fast method with proinsulin synthesis is rational, for others – a more accurate and controlled two-chain method. The bacteria – Escherichia coli and yeast – Saccharomyces cerevisiae remain the expression systems used in the existing large-scale production technologies. But using E. coli, insulin precursors are produced in inclusion bodies, and fully functional polypeptides are obtained by solubilization and refolding steps. The yeast-based system yields a soluble insulin precursor that is secreted into the culture fluid, but requires prior humanization due to the risks of an immune response in humans. Thus, current production technologies cannot meet the growing demand for available insulin due to limited production capacity and high production costs, so research is being conducted to find new efficient expression systems, such as plant and mammalian cells, including Arabidopsis thaliana, tobacco, lettuce, strawberry, stem cells.

17 February 2023 in News of Pharmacy
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Journal Article
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OROlena Ruban
Olena Ruban
DPD. S. Puliaiev
D. S. Puliaiev
NKNatalia Khokhlenkova
Natalia Khokhlenkova
OIO. I. Ivanyuk
O. I. Ivanyuk
Aim. To analyze the scientific literature data on the use of three-dimensional technologies in pharmacy, in particular in the technology of oral solid dosage forms, the advantages and disadvantages of 3D printing, and current research on the development of drugs using 3D printing. Materials and methods. To achieve this goal, bibliosemantic and analytical methods were used. Results and discussion. Personalized medicine is currently a major area of development in the healthcare sector. Its goal is to adapt treatment to a specific person, taking into account the peculiarities of the physiology, drug reactions, and the genetic profile. There are technologies that contribute to the paradigm shift from the traditional “one-size-fits-all” approach to personalized medicine, the main one being three-dimensional (3D) printing. 3D printing involves the creation of a three-dimensional object using various computer programs. 3D printing can be used to create a wide range of dosage forms that differ in shape, release profile, and drug combination. The main 3D printing technology platforms under study in the pharmaceutical sector include inkjet printing, binder inkjet printing, fused filament manufacturing, selective laser sintering, stereolithography, and injection microsyringing. Conclusions. The article discusses various 3D printing technologies and the prospects for their application in research on the development of new medicines, in particular oral solid dosage forms, and highlights their advantages and disadvantages.

23 October 2023 in News of Pharmacy
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Journal Article
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ASA. V. Soloviova
A. V. Soloviova
OKO. S. Kalyuzhnaya
O. S. Kalyuzhnaya
NKNatalia Khokhlenkova
Natalia Khokhlenkova
NDN. V. Dvinskykh
N. V. Dvinskykh
The aim was conducted research to develop the composition and technology of a new soft preparation under the conventional name "Probioskin" for topical use with a probiotic component in the form of an emulgel. Materials and methods of work. The homogeneity was determined by visual inspection of the experimental samples, using a biological microscope XSP-128 ULAB. The rheological (structural and mechanical) properties of the samples were studied using a Rheolab QC rheoviscosimeter (Anton Paar, Austria) with a C-CC27/SS coaxial cylinder system. The Rheolab QC rheometer is equipped with RheoPlus software. Microbiological studies and biotesting on a biological model of infusoria were performed under aseptic conditions of a laminar flow box (biological safety cabinet AC2-4E1 "Esco", Indonesia) of the Department of Biotechnology of the National University of Pharmacy. The identification of lactobacilli and the number of live cells as critical indicators of a preparation containing live microorganisms were performed at each stage of the study. Bacterioscopic control was carried out by examining smears prepared from samples of the dissolved drug and stained by Gram stain. Bacteriological control was performed by inoculation on thick MRS-4 medium and liquid MRS-1 medium. The number of live lactobacilli (when lactobacilli were co-cultured with the drug components at the stages of development and in the finished product) was determined by surface sowing on Petri dishes with thick MRS-4 medium; after 48 h of incubation at (37±1)°C, colonies grown on the surface of the medium were counted and the number of live lactobacilli expressed in CFU was calculated in 1 ml of the drug. Results and discussion. Based on the conducted research, the composition of a soft preparation for topical use containing dexpanthenol, lactic acid, lyophilized lactobacillus biomass, propylene glycol, peach oil, polysorbate-80, aristoflex AVC, tocopherol, and purified water was developed. The production process of the developed Probioskin product is carried out according to a standardized scheme and consists 8 stages: preparation of raw materials, preparation of oil concentrate of the probiotic component, preparation of aqueous concentrate of active substances, preparation of gel base, preparation of emulsion, dosing into tubes, packaging of tubes into packs, packaging of packs into group containers. Conclusions. On the basis of a complex research, the composition and rational technology of a soft preparation for topical use under the conventional name "Probioskin" in the form of an emulsion was developed. Key words: pharmacological research, soft drug, emulgel, probiotics, dermatological diseases

7 February 2022 in News of Pharmacy
Verified
Journal Article
Open access
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OTO. I. Trembach
O. I. Trembach
NKNatalia Khokhlenkova
Natalia Khokhlenkova
Aim. To theoretically substantiate the composition of a wound healing ointment with active substances of plant origin for the therapy in the second and third phases of the wound process. Materials and methods. The study object was the generalization and analysis of scientific literature data on the use of medicinal plants in the treatment of the wound process. Results and discussion. Based on the analysis of scientific literature data on the chemical composition and pharmacological properties of medicinal plants used in the treatment of the wound process, the expediency of using the lipophilic extract of marigold flowers, amaranth oil, fennel essential oil as active ingredients in the wound healing ointment has been substantiated. Marigold flowers due to the presence of a large number of carotenoids and flavonoids will provide a high level of the antimicrobial, reparative action of the ointment. Due to the content of complex biologically active compounds, such as tocopherols, polyunsaturated fatty acids, vitamins, phytosterols and squalene, the amaranth oil has a pronounced antioxidant activity. The components that are part of the essential oil of fennel contribute to the connective tissue growth and the skin restoration, as well as provide a high level of the antifungal action. Conclusions. The analysis of scientific literature data has shown the possibility of using herbal medicines in the treatment of the wound process. The greatest advantage of herbal medicines is the high degree of assimilation of molecules of biologically active substances, which are part of natural compounds as the most physiological form, by skin cells. The expediency of using the lipophilic extract of marigold, amaranth oil and fennel essential oil when developing a wound-healing ointment has been proven. The composition selected will provide the predicted antibacterial, antifungal, antioxidant and reparative effect of the ointment, reduce the likelihood of resistance in pathogenic microorganisms, and accelerate granulation and epithelialization of tissues.

8 October 2022 in News of Pharmacy
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Journal Article
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MLM. А. Lavrentiev
M. А. Lavrentiev
OKO. S. Kaliuzhnaia
O. S. Kaliuzhnaia
NKNatalia Khokhlenkova
Natalia Khokhlenkova
NDN. V. Dvinskykh
N. V. Dvinskykh
Aim. To develop the composition of a functional fermented product for therapeutic and preventive nutrition based on propionic acid bacteria enriched with carbohydrate-containing component – honey. Materials and methods. The study objects were a lyophilized starter of propionic acid bacteria (Propionibacterium freudenreichii subsp. shermanii), milk, honey and samples of a functional fermented product made on the basis of these components. We used physico-chemical methods (determination of titrated acidity; pH determination), microbiological methods (Koch cup method; Gram stain), technological methods (determination of the syneresis degree), and organoleptic methods (the sensory profile) in our study. The statistical processing of results was carried out using the Excel software for Windows. Results and discussion. During the experimental studies it was found that the required amount of the sowing material (starter) to obtain a product of the proper quality should be 3.75 % of the amount of the raw material (propionic acid bacteria – 106 CFU/ ml). It was proven that the optimum parameters of the main biotechnological stage of the drink preparation process were: temperature – 30 °С, time – 12 h, conditions – anaerobic. It was shown that adding 5 % of honey improved the organoleptic, physico-chemical parameters of the product, increased its biological value and reduced the time of the technological process. Conclusions. According to the results of the technological, physico-chemical, microbiological tests the composition of the fermented product based on propionic acid bacteria enriched with honey has been developed. The product developed meets the nutritional needs and is an additional source of biologically active substances; it will increase the immune status of the body and contribute to improving its overall health.