Publications by authors named "Mayya P Razgonova"

2 Publications

  • Page 1 of 1

Simultaneous Determination of 78 Compounds of Extract by Supercritical CO-Extraction and HPLC-ESI-MS/MS Spectrometry.

Biochem Res Int 2021 6;2021:9957490. Epub 2021 Jul 6.

N. I. Vavilov All-Russian Institute of Plant Genetic Resources, B. Morskaya 42-44, Saint-Petersburg 190000, Russia.

The plant L. of family was extracted using the supercritical CO-extraction method. Several experimental conditions were investigated in the pressure range of 200-500 bar, with the used volume of cosolvent ethanol in the amount of 1% in the liquid phase at a temperature in the range of 31-70°C. The most effective extraction conditions are pressure 350 bar and temperature 60°C. The extracts were analyzed by HPLC with MS/MS identification. 78 target analytes were isolated from (Russia) using a series of column chromatography and mass spectrometry experiments. The results of the analysis showed a spectrum of the main active ingredients : salidroside, rhodiolosides (B and C), rhodiosin, luteolin, catechin, quercetin, quercitrin, herbacetin, sacranoside A, vimalin, and others. In addition to the reported metabolites, 29 metabolites were newly annotated in There were flavonols: dihydroquercetin, acacetin, mearnsetin, and taxifolin-O-pentoside; flavones: apigenin-O-hexoside derivative, tricetin trimethyl ether 7-O-hexosyl-hexoside, tricin 7-O-glucoronyl-O-hexoside, tricin O-pentoside, and tricin-O-dihexoside; flavanones: eriodictyol-7-O-glucoside; flavan-3-ols: gallocatechin, hydroxycinnamic acid caffeoylmalic acid, and di-O-caffeoylquinic acid; coumarins: esculetin; esculin: fraxin; and lignans: hinokinin, pinoresinol, L-ascorbic acid, glucaric acid, palmitic acid, and linolenic acid. The results of supercritical CO-extraction from roots and rhizomes of , in particular, indicate that the extract contained all biologically active components of the plant, as well as inert mixtures of extracted compositions.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
July 2021

Telomerase and telomeres in aging theory and chronographic aging theory (Review).

Mol Med Rep 2020 Sep 25;22(3):1679-1694. Epub 2020 Jun 25.

Laboratory of Toxicology, Medical School, University of Crete, 71003 Heraklion, Greece.

The current review focuses on the connection of telomerase and telomeres with aging. In this review, we describe the changes in telomerase and telomere length (TEL) during development, their role in carcinogenesis processes, and the consequences of reduced telomerase activity. More specifically, the connection of TEL in peripheral blood cells with the development of aging‑associated diseases is discussed. The review provides systematic data on the role of telomerase in mitochondria, the biology of telomeres in stem cells, as well as the consequences of the forced expression of telomerase (telomerization) in human cells. Additionally, it presents the effects of chronic stress exposure on telomerase activity, the effect of TEL on fertility, and the effect of nutraceutical supplements on TEL. Finally, a comparative review of the chronographic theory of aging, presented by Olovnikov is provided based on currently available scientific research on telomere, telomerase activity, and the nature of aging by multicellular organisms.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
September 2020