Publications by authors named "Olga Yu Glyzina"
Article Synopsis
- The study examines how juvenile Baikal whitefish, both preadapted and non-adapted, respond at the genetic level to heat shock after being exposed to temperature changes during their development.
- Preadapted fish experienced a controlled thermal rise during their growth, while both groups were tested under standard and increased temperature conditions to measure gene expression responses.
- The findings show that preadapted fish had heightened expression in genes related to immune response and growth, while non-adapted fish showed increased activity in metabolism-related genes, highlighting differences in how these two groups handle thermal stress.
Acclimation during Embryogenesis Remodulates Telomerase Activity and Gene Expression in Baikal Whitefish Larvae, Mitigating the Effects of Acute Temperature Stress.
Animals (Basel)
October 2024
Article Synopsis
- Acclimation through the hormesis effect enhances flexibility in organisms, which has been confirmed in various ectothermic species, including the Baikal whitefish, by examining telomere length and gene expression.
- The study found that while acclimation and acute temperature stress did not affect telomere length, they did influence telomerase activity, with acclimated larvae showing decreased activity and stressed larvae showing increased activity.
- Acclimated larvae exhibited increased expression of genes involved in antioxidant defense, indicating a better ability to manage oxidative stress compared to non-acclimated larvae, along with changes in telomere-related gene expression under stress.
One of the little-studied ways that climate warming or temperature increases in aquaculture could affect aquatic animals is through accelerated aging. This study is dedicated to understanding the principles of molecular and cellular aging in the target tissues of juvenile whitefishes (Yenisei hump-snout whitefish and its hybrid) under the influence of acute heat stress (up to 26 °C), and the effects of thermal preconditioning as pre-adaptation. Non-adapted stressed hump-snout whitefish showed a higher induction threshold for functionally active mitochondria in the blood and a decrease in telomerase activity in the liver after heat shock exposure as a long-term compensatory response to prevent telomere shortening.
View Article and Find Full Text PDFThis work simulates the consequences of HIREC using stone sculpins as model organisms. Sex-dependent effects of long-term noise exposure at mean sound pressure levels of 160-179 dB re 1 μPa (SPL) were measured. We applied a multilevel approach to testing the stress response: a comparative analysis of the macula sacculi and an assessment of hematological and molecular stress responses.
View Article and Find Full Text PDFThis research examined the impacts of acoustic stress in peled (Coregonus peled Gmelin, 1788), a species commonly cultivated in Russia. This study presents a comparative analysis of the macula sacculi and otoliths, as well as primary hematological and secondary telomere stress responses, in control and sound-exposed peled. The authors measured the effects of long-term (up to 18 days) exposure to a 300 Hz tone at mean sound pressure levels of 176-186 dB re 1 μPa (SPL); the frequency and intensity were selected to approximate loud acoustic environments associated with cleaning equipment in aquaculture settings.
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