Publications by authors named "Valery Danilenko"

Agricultural and industrial activities are increasing pollution of water bodies with low doses of xenobiotics that have detrimental effects on aquaculture. The aim of this work was to determine the possibility of using 47f culture in fish aquaculture under the influence of low doses of xenobiotics as an adaptogen. An increase in the survival of individuals exposed to the xenobiotic bisphenol A solution and fed with the 47f was shown compared to control groups and, at the same time, the cytokine profile in the intestinal tissues of was also investigated.

View Article and Find Full Text PDF

In recent years, there has been an increasing tendency to create drugs based on certain commensal bacteria of the human microbiota and their ingredients, primarily focusing on live biotherapeutics (LBPs) and postbiotics. The creation of such drugs, termed pharmacobiotics, necessitates an understanding of their mechanisms of action and the identification of pharmacologically active ingredients that determine their target properties. Typically, these are complexes of biologically active substances synthesized by specific strains, promoted as LBPs or postbiotics (including vesicles): proteins, enzymes, low molecular weight metabolites, small RNAs, etc.

View Article and Find Full Text PDF
Article Synopsis
  • - The increasing global prevalence of depressive disorders is driving research into early diagnosis and treatment strategies, particularly focused on the microbiota-gut-brain axis.
  • - The review explores how gut microbes can influence mental health and evaluates their potential as biomarkers for depression through metagenomic signatures.
  • - Alternative treatments for depression, like dietary modifications and probiotics (including new candidates like specific bacteria), are being considered for their ability to balance gut microbiota and improve mental health.
View Article and Find Full Text PDF

In this study, the results of evaluating the acute toxicity of Bisphenol A on are presented, encompassing peripheral blood parameters, the composition of hematopoietic cells of erythroid and myeloid lines in the head kidney, and data from histological studies. The LC50 values of Bisphenol A for adult zebrafish individuals for 12, 24, and 48-96 h were determined, which were 18.04, 7.

View Article and Find Full Text PDF
Article Synopsis
  • This study investigates the ability of specific protein fragments (2D FN3 and CD FN3) from a bacterial strain, GT15, to bind to the inflammatory cytokine TNF-α, using a sandwich ELISA method for detection.
  • Results reveal that neither 2D FN3 nor CD FN3 can bind to TNF-α alone, however, the full ∆FN3.1 protein is capable of forming a binding pocket for TNF-α.
  • Additionally, the study analyzes genetic variations in the amino acid sequences of ∆FN3.1 and compares FN3 domains from human gut bacteria, highlighting those with cytokine receptor motifs and their structural similarities with human proteins.
View Article and Find Full Text PDF

The World Health Organization (WHO) reports that tuberculosis (TB) is one of the top 10 leading causes of global mortality. The increasing incidence of multidrug-resistant TB highlights the urgent need for an intensified quest to discover innovative anti-TB medications In this study, we investigated four new derivatives from the quinoxaline-2-carboxylic acid 1,4-dioxide class. New 3-methylquinoxaline 1,4-dioxides with a variation in substituents at positions 2 and 6(7) were synthesized via nucleophilic aromatic substitution with amines and assessed against a spp.

View Article and Find Full Text PDF

In the last few years, investigation of the gut-brain axis and the connection between the gut microbiota and the human nervous system and mental health has become one of the most popular topics. Correlations between the taxonomic and functional changes in gut microbiota and major depressive disorder have been shown in several studies. Machine learning provides a promising approach to analyze large-scale metagenomic data and identify biomarkers associated with depression.

View Article and Find Full Text PDF

is a predominant and important genus in the bacterial population of the human gut microbiota. Despite the increasing number of studies on the beneficial functionality of bifidobacteria for human health, knowledge about their antioxidant potential is still insufficient. Several in vivo and in vitro studies of strains and their cellular components have shown good antioxidant capacity that provided a certain protection of their own and the host's cells.

View Article and Find Full Text PDF

Background And Aim: Prolonged stress causes deleterious effects on both the organism and its microbiota. In this study, we examined the effects of exposure to variable frequency ultrasound (US) on the gut microbiota-liver-brain axis of mice.

Materials And Methods: This study was conducted on 20 mature clinically healthy sexually naive C57BL/6J male mice (42-45 days old).

View Article and Find Full Text PDF

In the present article, the possible mitigation of the toxic effect of imidacloprid low-concentration chronic exposure on by the probiotic strain 47f (1 × 10 CFU/g) was examined. It was found that even sublethal concentration (2500 µg/L) could lead to the death of some fish during the 60-day chronic experiment. However, the use of 47f partially reduced the toxic effects, resulting in an increased survival rate and a significant reduction of morphohistological lesions in the intestines and kidneys of .

View Article and Find Full Text PDF

Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by heterogeneous cognitive, behavioral and communication impairments. Disruption of the gut-brain axis (GBA) has been implicated in ASD although with limited reproducibility across studies. In this study, we developed a Bayesian differential ranking algorithm to identify ASD-associated molecular and taxa profiles across 10 cross-sectional microbiome datasets and 15 other datasets, including dietary patterns, metabolomics, cytokine profiles and human brain gene expression profiles.

View Article and Find Full Text PDF

Drug resistance (DR) in is the main problem in fighting tuberculosis (TB). This pathogenic bacterium has several types of DR implementation: acquired and intrinsic DR. Recent studies have shown that exposure to various antibiotics activates multiple genes, including genes responsible for intrinsic DR.

View Article and Find Full Text PDF

Apis cerana and Apis mellifera are important honey bee species in Asia. A. cerana populations are distributed from a cold, sharply continental climate in the north to a hot, subtropical climate in the south.

View Article and Find Full Text PDF

Major depressive disorder (MDD) is among the most prevalent mental disorders worldwide. Factors causing the pathogenesis of MDD include gut microbiota (GM), which interacts with the host through the gut-brain axis. In previous studies of GM in MDD patients, 16S rRNA sequencing was used, which provided information about composition but not about function.

View Article and Find Full Text PDF

In this study, the effect of three promising feed additives (chelated compounds of trace elements, butyric acid, lycopene) on changes in the culturable microbiota and histological parameters of two sections of the intestines of (zebrafish) was studied. The use of these feed additives can help to eliminate the deficiency of trace elements, modulate the composition of the microbiota due to the postbiotic properties of butyric acid, and reduce oxidative stress when using lycopene. Incorporation of the investigated supplements in the feed resulted in a significant change in the relative abundance of certain groups of microorganisms.

View Article and Find Full Text PDF

New complexes of zinc(ii) and copper(ii) with 2-furoic acid (Hfur), acetic acids and N-donor ligands with the compositions [Zn(fur)] (1), [Zn(fur)(NHpy)] (2, NHpy = 3-aminopyridine), [Zn(fur)(neoc)] (3, neoc = 2,9-dimethyl-1,10-phenantroline), [Zn(OAc)(neoc)] (4, OAc = acetat-anion), and [Cu(fur)(neoc)(HO)] (5) were synthesized. The structures of the compounds were established by single crystal X-ray diffraction analysis. Complexes 1 and 2 are binuclear; whereas 3-5 are mononuclear.

View Article and Find Full Text PDF

The human gut microbiome is associated with various diseases, including autism spectrum disorders (ASD). Variations of the taxonomical composition in the gut microbiome of children with ASD have been observed repeatedly. However, features and parameters of the microbiome CRISPR-Cas systems in ASD have not been investigated yet.

View Article and Find Full Text PDF

The emergence of drug resistance in pathogens leads to a loss of effectiveness of antimicrobials and complicates the treatment of bacterial infections. Quinoxaline 1,4-dioxides represent a prospective scaffold for search of new compounds with improved chemotherapeutic characteristics. Novel 2-acyl-3-trifluoromethylquinoxaline 1,4-dioxides with alteration of substituents at position 2 and 6 were synthesized via nucleophilic substitution with piperazine moiety and evaluated against a broad panel of bacteria and fungi by measuring their minimal inhibitory concentrations.

View Article and Find Full Text PDF

In the current era of a pandemic, infections of COVID-19 and Tuberculosis (TB) enhance the detrimental effects of both diseases in suffering individuals. The resistance mechanisms evolving in are limiting the efficiency of current therapeutic measures and pressurizing the stressed medical infrastructures. The bacterial efflux pumps enable the development of resistance against recently approved drugs such as bedaquiline and clofazimine.

View Article and Find Full Text PDF

Introduction: Depression is one of the most common mental illnesses. Impaired neurogenesis is observed in depression. Biomarkers of impaired neurogenesis in depression can act as a useful objective and diagnostic and prognostic tool to determine the severity of depression.

View Article and Find Full Text PDF

In the last decade, metagenomic studies have shown the key role of the gut microbiome in maintaining immune and neuroendocrine systems. Malfunction of the gut microbiome can induce inflammatory processes, oxidative stress, and cytokine storm. Dysfunction of the gut microbiome can be caused by short-term (virus infection and other infectious diseases) or long-term (environment, nutrition, and stress) factors.

View Article and Find Full Text PDF

Lactobacilli and bifidobacteria are an important part of human gut microbiota. Among numerous benefits, their antioxidant properties are attracting more and more attention. Multiple in vivo and in vitro studies have demonstrated that lactobacilli and bifidobacteria, along with their cellular components, possess excellent antioxidant capacity, which provides a certain degree of protection to the human body against diseases associated with oxidative stress.

View Article and Find Full Text PDF
Article Synopsis
  • Bifidobacteria have significantly influenced the immune systems of various animals throughout evolution, leading to ongoing research into their immunomodulatory effects in both animals and humans.
  • Recent discoveries reveal the PFNA cluster, containing five core genes, is present in all gut-dwelling bifidobacterial species in humans, potentially linking these bacteria to immune system interactions.
  • The FN3 protein within the PFNA cluster may interact with immune signals, specifically binding to TNF-α, suggesting potential applications in developing anti-inflammatory drugs to combat conditions like cytokine storms from SARS-CoV-2 infection.
View Article and Find Full Text PDF
Article Synopsis
  • Tuberculosis (TB) poses a significant health threat, with finding new drugs and treatments being crucial for its control.
  • Imidazo[1,2-][1,2,4,5]tetrazines have shown effectiveness against TB strains, but resistance arises from mutations that enhance operon expression, complicating treatment.
  • Research indicates that these compounds may disrupt mycobacterial iron metabolism by upregulating genes related to siderophore synthesis in response to different drug concentrations.
View Article and Find Full Text PDF

Probiotic bacteria are widely accepted as therapeutic agents against inflammatory bowel diseases for their immunostimulating effects. In the last decade, more evidence has emerged supporting the positive effects of probiotics on the course of neurodegenerative and psychiatric diseases. This brief review summarizes the data from clinical studies of probiotics possessing antidepressant properties and focuses on the potential genes and proteins underlying these mechanisms.

View Article and Find Full Text PDF