THE MICROBIOTA-GUT-AXIS LECTURE BY CLÁUDIO IBANEZ скачать в хорошем качестве

THE MICROBIOTA-GUT-AXIS LECTURE BY CLÁUDIO IBANEZ

In recent years, the intricate and dynamic relationship between the gut microbiota and the brain—termed the microbiota-gut-brain axis—has emerged as a pivotal area of study in modern neuroscience. This bidirectional communication system encompasses neural, endocrine, immune, and metabolic pathways that enable constant dialogue between the gastrointestinal tract and the central nervous system (CNS). The human gut harbors trillions of microorganisms, including bacteria, viruses, fungi, and archaea, which collectively play essential roles in digestion, immune modulation, and metabolic homeostasis. Beyond these traditional functions, mounting evidence suggests that the gut microbiota significantly influences brain development, function, and behavior. This complex interaction is now recognized to be crucial in the pathophysiology of a wide range of neurological and psychiatric disorders, including but not limited to Alzheimer's disease, Parkinson's disease, multiple sclerosis, autism spectrum disorders, depression, and anxiety. At the core of the microbiota-gut-brain axis are several key mechanisms. First, microbial metabolites such as short-chain fatty acids (SCFAs), neurotransmitters (e.g., GABA, serotonin), and tryptophan metabolites can cross the blood-brain barrier or influence vagal afferent signaling, thereby modulating CNS function. Second, the immune system acts as a vital intermediary, with gut-derived cytokines and inflammatory mediators affecting neuroinflammatory pathways. Third, the enteric nervous system and the vagus nerve provide a direct neural route for bidirectional communication between the gut and brain. Disruptions in gut microbial diversity—often referred to as dysbiosis—have been associated with altered neurodevelopmental trajectories and disease progression. The microbiota-gut-brain axis represents a paradigm shift in our understanding of brain health and disease. As research continues to unravel the molecular underpinnings of this axis, a more integrated view of human biology—one that bridges microbiology, neuroscience, immunology, and psychiatry—is beginning to take shape. This holistic perspective not only enhances our understanding of neurological disorders but also opens up novel diagnostic and therapeutic possibilities. The future of neurology may well depend on our ability to decode and harness the signals originating from within our own gut.