Psychoneuroimmunoendocrinology and immune homeostasis: gut-brain axis, obesity and cognitive function

The new competencies of psychoneuroimmunoendocrinology and psychoneuroimmunology play a strategic role in interdisciplinary science and interdisciplinary planning and decision-making. The introduction of multi-vector neurotechnologies of artificial intelligence and the principles of digital health care will contribute to the development of modern neuroscience and neuromarketing. The availability of innovative technologies, such as next-generation sequencing and correlated bioinformatics tools, allows deeper investigation of the cross-network relationships between the microbiota and human immune responses. Immune homeostasis is the balance between immunological tolerance and inflammatory immune responses - a key feature in the outcome of health or disease. A healthy microbiota is the qualitative and quantitative ratio of diverse microbes of individual organs and systems, maintaining the biochemical, metabolic and immune equilibrium of the macroorganism necessary to preserve human health. Functional foods, healthy biomicrobiota, healthy lifestyle and controlled protective environmental effects, artificial intelligence and electromagnetic information load/overload are responsible for the work of the human immune system and its ability to respond to pandemic attacks in a timely manner. Obesity continues to be one of the main problems of modern health care due to its high prevalence and polymorbidity. In addition to cardiometabolic diseases, lesions of the musculoskeletal system, obese individuals show impaired cognitive functions, have a high risk of developing depression and anxiety. The gut microbiota mediates between environmental influences (food, lifestyle) and the physiology of the host, and its change may partially explain the cross-link between the above pathologies. It is known that Western eating patterns are the main cause of the obesity epidemic, which also contributes to dysbiotic drift of the gut microbiota, which in turn contributes to the development of complications associated with obesity. Experimental studies in animal models and, to a lesser extent in humans, show that microbiota is associated with obesity and may contribute to the endocrine, neurochemical and development of systemic inflammation underlying obesity itself and related diseases. Nevertheless, a number of questions remain at present. Modeling the microbiota-gut-brain axis, provides the brain with information from the gut not only through the nervous system but also through a continuous stream of microbial, endocrine, metabolic and immune messages. The communication network provides important keys to understanding how obesity and diabetes can affect the brain by provoking neuropsychiatric diseases. The literature review is devoted to the analysis of data on the relationship of the gut-brain axis, obesity and cognitive functions, immune homeostasis and new competencies: psychoneuroimmunology and psychoneuroimmunoendocrinology.