It was shown that chromatin contained in human lymphocytes has two stages of denaturation: with T(d)VII = 94.4 degrees C, Q(d)VII = 50.8 J/g DNA, and T(d)VIII = 105.1 degrees C Q(d)VIII = 44.9 J/g DNA. The peptide bioregulator prostamax causes a redistribution of heat among endotherms T(d)III and T(d)IV and a shift of both endotherms to low temperatures by 2.9 and 1.0 degrees C, respectively. It was supposed that the redistribution of heat among endotherms is connected with a partial relaxation of the 30-nm-thick fiber in the 10-nm filament. A weak decrease in T(d)VIII and T(d)VII of lymphocytes treated with prostamax compared to untreated ones is connected with small structural changes of nucleosomal organization in the 10-nm filament and 30-nm-thick fiber.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Effect of L. on Improving Insulin Secretory Capacity and Resistance in Elderly Patients Aged 80 Years Old or Older Who Develop Diabetes After COVID-19 Infection.
Nutrients
January 2025
Department of Bioregulation and Pharmacological Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima City 960-1295, Fukushima, Japan.
(1) Background: It has been reported that people affected by COVID-19, an infectious disease caused by SARS-CoV-2, suffer from various diseases, after infection. One of the most serious problems is the increased risk of developing diabetes after COVID-19 infection. However, a treatment for post-COVID-19 infection diabetes has not yet been established.
View Article and Find Full Text PDFDeletion of IRS-1 leads to growth failure and insulin resistance with downregulation of liver and muscle insulin signaling in rats.
Sci Rep
January 2025
Department of Bioregulation, Institute for Advanced Medical Sciences, Nippon Medical School, Kawasaki, Kanagawa, Japan.
Insulin receptor substrate (IRS)-1 and IRS-2 are major molecules that transduce signals from insulin and insulin-like growth factor-I receptors. The physiological functions of these proteins have been intensively investigated in mice, while little is known in other animals. Our previous study showed that the disruption of IRS-2 impairs body growth but not glucose tolerance or insulin sensitivity in rats, which led us to hypothesize that IRS-1 plays more pivotal roles in insulin functions than IRS-2.
View Article and Find Full Text PDF[Peptidergic regulation of expression of cellular aging marker proteins in buccal epithelium.].
Adv Gerontol
January 2025
Belgorod State National Research University, 85 build. 10 Pobedy str., Belgorod 308015, Russian Federation, e-mail:
Article Synopsis
- The review summarizes long-term research by the Saint-Petersburg Institute of Bioregulation and Gerontology on the biological activity of peptide bioregulators and compares findings from domestic and international studies.
- Russian scientists have taken the lead in using buccal epithelium as a diagnostic marker for age-related diseases, highlighting their significant contributions in this field.
- The research reveals that peptides from the epiphysis can enhance melatonin secretion and influence circadian rhythms in the elderly by regulating gene expression and reducing harmful protein synthesis, suggesting their potential as therapeutic agents for age-related issues.
[Peptide regulation of cellular aging.].
Adv Gerontol
January 2025
Saint-Petersburg Institute of Bioregulation and Gerontology, 3 Dinamo av., St. Petersburg 197110, Russian Federation, e-mail:
Cellular aging is the inability of structures to proliferate (further division) and repair damage while maintaining metabolic activity. The key well-known factors of cellular aging are the processes of DNA damage, telomere shortening, the development of oxidative stress and epigenetic changes. The above factors provoke the development of a pro-inflammatory environment, leading to errors in gene expression and metabolic dysregulation, thereby affecting the development of age-related diseases that contribute to pathological changes in the functions of tissues and organs.
View Article and Find Full Text PDF[Neuroprotective therapy for age-related macular degeneration].
Vestn Oftalmol
December 2024
West Siberian Institute of Postgraduate Medical Education, Tyumen, Russia.
Age-related macular degeneration (AMD) is a chronic multifactorial degenerative eye disease and one of the leading causes of irreversible blindness worldwide. Despite extensive research, there is no consensus on the predominant pathological mechanism leading to photoreceptor death. AMD is associated with molecular and cellular disruptions that ultimately result in photoreceptor degeneration.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!