Introduction
The discovery that the brain has its own microbioma has accelerated a whole new research area in neuroscience. Previously, the brain was considered sterile, protected by the blood-brain barrier that effectively prevented microorganisms from penetrating. But recent research has shown that the brain is not only a biological network of nerve cells and synapses, but also houses its own society of microorganisms such as bacteria, viruses and fungi. This insight has groundbreaking implications on how we understand and treat neurological diseases, especially neurodegenerative disorders such as Alzheimer's, Parkinson's and Multiple Sclerosis. This article will explore the growing understanding of the brain's microbioma and its possible connection with health, including how the microbiota can affect the development of diseases, as well as potential therapeutic strategies to manipulate this microbioma to improve neurological health.
Nikki Schultek's History: A Turning Point
This story illustrates how infections and microorganisms can affect both body and mind, and have led to increased interest in how microbiomas can play a role in cognitive disorders.
Brain microbiom: a revolutionary discovery
Previously, scientists assumed that microorganisms were only able to affect the brain indirectly through the gut through the vagus nerve or the production of neuro -active substances. However, advanced microscopic techniques have revealed that microorganisms such as bacteria are found directly in the brain tissue. Bacteria from well -known groups such as Firmicutes, Proteobacteria and Bacteroidetes have been found in the brain, and they appear to gather around important cells such as astrocytes and neurons.
Astrocytes are especially important because they maintain the blood-brain barrier and regulate the brain tissue homeostasis. Microbes that accumulate around the astrocytes can interfere with this protective mechanism, which can potentially increase the risk of neurodegenerative disorders.
Microbiota-tarm-brain axis: Communication between intestine and brain
The intestinal microbioma plays a key role in how the body communicates with the brain. This compound, known as the microbiota-tong-brain axis, involves constant communication between microbes in the gut and brain cells. Via the vagus nerve and the immune system, the intestinal microbioma sends signals affecting mood, cognition and behavior.Short-chain fatty acids (SCFA) such as butyrat and propionate, produced by the intestinal microbiota, can cross the blood-brain barrier and reduce the inflammation of the brain. Disorders of this communication, known as dysbiosis, can lead to serious health problems, including anxiety, depression, Alzheimer's disease and Parkinson's disease.
Microbial infection and neurodegenerative diseases
Neurodegenerative diseases such as Alzheimer's and Parkinsons have been shown to be associated with increased levels of bacteria in the brain. Bacteria that Streptococcus and Staphylococcus is found in increased amounts in patients with Alzheimer's, suggesting that infections can contribute to disease progression by triggering inflammation and the formation of harmful proteins such as amyloid beta.Candida-Arts and other fungi have also been detected in the brain of people with neurological disorders, which has led researchers to assume that microbial infection can be an important but hitherto underrated, factor in the development of neurodegenerative disorders.
Neuroin flammation: brain response to microbial presence
Microglia and astrocytes are two types of glial cells in the brain that play a critical role in the brain's immune response. When the brain detects the presence of harmful microbes, microglia is activated to fight the infection. However, in chronic conditions, this activation can lead to a persistent inflammatory response, known as neuroin flammation. This can contribute to damage to neurons and aggravation of diseases such as Alzheimer's.
Astrocytes, which normally protect the neurons, can also become dysfunctional during chronic microbial exposure. This can weaken the blood-brain barrier, making it easier for bacteria and toxins to penetrate the brain and aggravate neurodegenerative processes.
Therapeutic Opportunities: Manipulation of the Microbioma
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Probiotics and prebiotics: Supplements with specific strains of bacteria, which Lactobacillus and Bifidobacterium, has been shown to reduce inflammation and improve cognitive function in people with Alzheimer's disease.
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Fecal Microbiota Transplantation (FMT): This treatment, which involves the transmission of microbiota from a healthy donor to a patient, has shown promising results in the treatment of intestinal -related disorders affecting the brain, including autism and Parkinson's disease.
- Diet: Dietary interventions such as increasing fiber intake and reducing intake of inflammatory foods have also been shown to support a healthy intestinal microbiota and reduce the risk of neurological diseases.
Conclusion
The discovery of brain microbioma has revolutionized our understanding of neurological health. This insight opens the door to new treatments for neurodegenerative diseases that can include anything from probiotic supplements to fecal microbiota transplant. Although much research remains to be fully understood how the microbioma in the brain affects our health, it is already clear that this knowledge will be crucial for future therapeutic interventions.
References
- Qin, J., et al. A Human Gut Microbial Gene Catalog Established by Metagenomic Sequencing.
- Bullmore, E., et al. The Microbiota-Gut-Brain Axis in Health and Disease.
- Nicholson, J.K., et al. Gut Microbiota and Health: Connecting Actinobacteria, Firmicutes, and Proteobacteria to Disease.
- Roberts, R., et al. Microbes in the Brain: Their Role in Neuro Inflammation.
- Rowland, I., et al. Gut Microbiota Functions: Metabolism of Nutriters and Other Food Components.
- Forsyth, C.B., et al. Increased Intestinal Permeability Correlates with Neuroinflammation in Parkinson's Disease.
- "Fecal Microbiota Transplantation for neurodegenerative Diseases." The Lancet Neurology.
- Hijtz, R.D., et al. Normal Gut Microbiota Modulates Brain Development and Behavior.
- Needham, B.D., et al.
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