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<p>The gut microbiota, a diverse community of microorganisms residing in the gastrointestinal tract, plays a vital role in maintaining overall health through digestion, nutrient production, and immune modulation. Factors such as diet, lifestyle, and medication use significantly influence its composition. Concurrently, the blood–brain barrier (BBB) serves as a crucial protective barrier, regulating the passage of substances between the bloodstream and the brain. Disruption of the BBB is linked to various neurological disorders and cognitive decline. Neurodegenerative diseases, including Alzheimer’s, Parkinson’s, and Huntington’s, can be exacerbated by compromised BBB integrity, allowing harmful substances to penetrate the brain and accelerate neuronal degeneration. This review examines the complicated relationship between gut microbiota and BBB integrity, focusing on their collective impact on neurodegenerative diseases. Despite advancements in understanding these systems independently, there remains a critical gap in comprehending their interconnected roles in neurodegeneration. Addressing this gap is paramount for developing innovative therapeutic strategies. Specifically, this review suggests that modulating the gut microbiota offers a promising and actionable approach to preserve BBB integrity, thereby presenting a novel avenue for mitigating neurodegeneration and improving the prognosis and quality of life for affected individuals.</p>

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Mechanistic Interplay of Gut Microbiota and Blood–Brain Barrier Integrity in Neurodegenerative Diseases

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Suleiman Ibrahim Mohammad,
  • Yasir Mohammed Hammood,
  • Asokan Vasudevan,
  • Subasini Uthirapathy,
  • Suhas Ballal,
  • A. Sabarivani,
  • Swati Mishra,
  • Deepak Nathiya,
  • Zahraa Haleem Al-qaim,
  • Abed J. Kadhim

摘要

The gut microbiota, a diverse community of microorganisms residing in the gastrointestinal tract, plays a vital role in maintaining overall health through digestion, nutrient production, and immune modulation. Factors such as diet, lifestyle, and medication use significantly influence its composition. Concurrently, the blood–brain barrier (BBB) serves as a crucial protective barrier, regulating the passage of substances between the bloodstream and the brain. Disruption of the BBB is linked to various neurological disorders and cognitive decline. Neurodegenerative diseases, including Alzheimer’s, Parkinson’s, and Huntington’s, can be exacerbated by compromised BBB integrity, allowing harmful substances to penetrate the brain and accelerate neuronal degeneration. This review examines the complicated relationship between gut microbiota and BBB integrity, focusing on their collective impact on neurodegenerative diseases. Despite advancements in understanding these systems independently, there remains a critical gap in comprehending their interconnected roles in neurodegeneration. Addressing this gap is paramount for developing innovative therapeutic strategies. Specifically, this review suggests that modulating the gut microbiota offers a promising and actionable approach to preserve BBB integrity, thereby presenting a novel avenue for mitigating neurodegeneration and improving the prognosis and quality of life for affected individuals.