Syuzan Marutyan

Yerevan State University | YSU · Faculty of Biology

In recent years, nanotechnology has revolutionized various sectors, particularly in nanomedicine, where nanomaterials are used for diagnosis, monitoring, control, prevention, and treatment. Among these, silver nanoparticles (AgNPs) stand out due to their remarkable antimicrobial and cytotoxic properties. Traditional chemical synthesis of AgNPs pose...

The effect of silver nanoparticles (Ag NPs) obtained in the presence of royal jelly (RJ) on the growth of yeast Candida guilliermondii NP-4, on the total and H⁺-ATPase activity, as well as lipid peroxidation process and antioxidant enzymes (superoxide dismutase (SOD), catalase) activity was studied. It has been shown that RJ-mediated Ag NPs have a...

Cancer poses a significant challenge in the medical field, requiring thorough investigation into its mechanisms and the development of effective treatments. Recently, there has been increasing interest in integrating drugs with metal nanoparticles, which are notable for their unique size and physicochemical properties, aiming to enhance anticancer...

This study investigates the effects of X-radiation on ATPase activity and antioxidant enzyme activity, particularly enzymes involved in proline biosynthesis, in yeast C. guilliermondii NP-4. Moreover, the study examined the post-irradiation repair processes in these cells. Results showed that X-irradiation at a dose of 300 Gy led to an increase in...

This study aimed to investigate the effect of X-radiation on the ATPase activity and the activity of antioxidant enzymes, including enzymes of proline biosynthesis, in C. guilliermondii NP-4 yeast cells after X-irradiation and the post-irradiation repair of cells. It has been shown that the X-irradiation of yeasts C. guilliermondii NP-4 at a dose o...

A preliminary evaluation of ATPase was performed in an experimental model of breast cancer. Total and mitochondrial ATPase activities were studied in the breast and liver of rats with DMBA-induced breast cancer. It has been shown that during the development of breast cancer in these tissues there is a significant increase in ATPase activity. At the...

Under the influence of electromagnetic waves of millimeter range with the frequency of 51.8 GHz, changes in the morphology, growth parameters and mitotic activity of yeasts C. guilliermondii NP-4 are revealed. Filamentous and giant cells appeared in a population of exposed yeasts. The sigmoid shape of the growth curve remained but the lag phase dur...

As a result of electron microscopic studies of morphogenesis in yeasts Candida guilliermondii NP‐4, the formation of new structures of volutin acidocalcisomes has been established within the cell cytoplasm. Under influence of X‐irradiation the changes in morphometric and electron‐dense properties of yeast cells were identified: in yeast cytoplasm,...

В метаболизме живых клеток ключевую роль играют пуриновые нуклеотиды, которыми клетка может быть снабжена либо путем синтеза de novo из более низкомолекулярных предшественников, либо посредством запасных путей синтеза нуклеотидов или так называемых “механизмов спасения нуклеотидов”. Пути спасения нуклеотидов позволяют переиспользовать промежуточные...

The use of mobile telephones and other telecommunication systems has dangerous consequences for human health, leading to various diseases [1,2]. Under the influence of electromagnetic radiation of extremely high frequencies (EMR EHF) changes in membrane-bound mechanisms in cells, and at high powers - also thermal action on cells, are observed [3]....

In metabolism of living cells a key role play purine nucleotides which cells can be supplied either by de novo synthesis from lower molecular weight precursors, or by alternate ways of nucleotide synthesis or so-called "nucleotide salvage pathways", which allow reusing of intermediate products of nucleotide metabolism in nucleotide synthesis. This...

The aim of this work was the investigation of colony forming ability of yeasts Candida guilliermondii NP-4 and changes in deamination of purine nucleotides and ATPase activity under influence of electromagnetic radiation of extremely high frequencies and upon repаir processes of irradiated cells. It has been shown that there is a decrease of colony...