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Open AccessJournal ArticleDOI

Impact of microbiota on central nervous system and neurological diseases: the gut-brain axis.

TLDR
The biological interplay between gut-brain axis is discussed, and how this communication may be dysregulated in neurological diseases is explored, and new insights in modification of gut microbiota composition are highlighted.
Abstract
Development of central nervous system (CNS) is regulated by both intrinsic and peripheral signals. Previous studies have suggested that environmental factors affect neurological activities under both physiological and pathological conditions. Although there is anatomical separation, emerging evidence has indicated the existence of bidirectional interaction between gut microbiota, i.e., (diverse microorganisms colonizing human intestine), and brain. The cross-talk between gut microbiota and brain may have crucial impact during basic neurogenerative processes, in neurodegenerative disorders and tumors of CNS. In this review, we discuss the biological interplay between gut-brain axis, and further explore how this communication may be dysregulated in neurological diseases. Further, we highlight new insights in modification of gut microbiota composition, which may emerge as a promising therapeutic approach to treat CNS disorders.

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Toxicity of Microplastics and Nanoplastics in Mammalian Systems

TL;DR: The prevailing data suggest that micro- and nanoplastic accumulation in mammalian and human tissues would likely have negative, yet unclear long-term consequences, and there is a need for cellular and systemic toxicity due to micro-and nanoplastics to be better illuminated, and the underlying mechanisms defined by further work.
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The Gut-Brain Axis: How Microbiota and Host Inflammasome Influence Brain Physiology and Pathology.

TL;DR: The status of the knowledge and the open questions in the field focusing on the function of intestinal microbial metabolites or products on CNS cells during healthy and inflammatory conditions, such as multiple sclerosis, Alzheimer's and Parkinson’s diseases, and also neuropsychiatric disorders are discussed.
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Role of gut-brain axis, gut microbial composition, and probiotic intervention in Alzheimer's disease.

TL;DR: As aging together with poor diet and gut-derived inflammatory response due to dysbiosis contributes to the pathogenesis of AD, modification of gut microbial composition by uptake of probiotic-rich food can act as a preventive/therapeutic option for AD.
Journal ArticleDOI

Current and Future Trends on Diagnosis and Prognosis of Glioblastoma: From Molecular Biology to Proteomics.

TL;DR: Both benefits and pitfalls of molecular biology and proteomics analyses are discussed, including the different mass spectrometry-based analytical techniques, highlighting how these investigation strategies are powerful tools to study the biology of glioblastoma, as well as to develop advanced methods for the management of this pathology.
Journal ArticleDOI

Gut microbial molecules in behavioural and neurodegenerative conditions.

TL;DR: Bacterial metabolites with known or suspected neuromodulatory activity are described, mechanisms of signalling pathways from the gut microbiota to the brain are defined and direct effects that gut bacterial molecules are likely exerting on specific brain cells are discussed.
References
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Journal ArticleDOI

Structural and functional features of central nervous system lymphatic vessels

TL;DR: In searching for T-cell gateways into and out of the meninges, functional lymphatic vessels lining the dural sinuses are discovered, which may call for a reassessment of basic assumptions in neuroimmunology and sheds new light on the aetiology of neuroinflammatory and neurodegenerative diseases associated with immune system dysfunction.
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Ingestion of Lactobacillus strain regulates emotional behavior and central GABA receptor expression in a mouse via the vagus nerve.

TL;DR: Chronic treatment with L. rhamnosus induced region-dependent alterations in GABAB1b mRNA in the brain with increases in cortical regions and concomitant reductions in expression in the hippocampus, amygdala, and locus coeruleus, in comparison with control-fed mice, highlighting the important role of bacteria in the bidirectional communication of the gut–brain axis.
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Commensal Bifidobacterium promotes antitumor immunity and facilitates anti–PD-L1 efficacy

TL;DR: Comparison of melanoma growth in mice harboring distinct commensal microbiota and observed differences in spontaneous antitumor immunity, suggests that manipulating the microbiota may modulate cancer immunotherapy.
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An immunomodulatory molecule of symbiotic bacteria directs maturation of the host immune system.

TL;DR: During colonization of animals with the ubiquitous gut microorganism Bacteroides fragilis, a bacterial polysaccharide (PSA) directs the cellular and physical maturation of the developing immune system.
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Normal gut microbiota modulates brain development and behavior

TL;DR: It is demonstrated that germ free (GF) mice display increased motor activity and reduced anxiety, compared with specific pathogen free (SPF) mice with a normal gut microbiota, suggesting that the microbial colonization process initiates signaling mechanisms that affect neuronal circuits involved in motor control and anxiety behavior.
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