Search results for blood-brain barrier

“Obesity - Obesity increases endotoxemia and toll-like receptor activation due to perturbed intestinal permeability and hyperglycemia,, disrupting blood-brain barrier function. Aerobic exercise - Exercise reduces age-related changes to the blood-brain barrier, increasing leakiness and neurodegeneration.”

“Fibrinogen also activates the microglia, the brain’s resident immune cells. When inflammatory signals activate microglial cells, they switch from protecting the blood-brain barrier to attacking it. This promotes a vicious cycle of blood-brain barrier dysfunction and neurotoxicity.”

“The blood-brain barrier is a collection of membranes that separate the central nervous system from the circulatory system. It permits the passage of nutrients and other beneficial molecules from the bloodstream into the brain while excluding harmful ones.”

“Alzheimer's patients have reduced GLUT1, the glucose transporter, at the blood-brain barrier, which may diminish neuronal activity. However, it is unclear which comes first, the breakdown of the blood-brain barrier or the reduced glucose transport, but it is likely a vicious cycle.”

“Pericytes play a crucial role in maintaining the blood-brain barrier by wrapping around the smallest blood vessels in the brain. However, these sensitive cells tend to detach from vessels and die early in the disease, compromising the integrity of the blood-brain barrier.”

“Fibrinogen deposition activates microglial cells leading to neuroinflammation. In animal models, reducing blood fibrinogen levels decreased how much fibrinogen crosses into the brain, reduced white matter damage, and partially restored vascular function and barrier integrity.”

“Chronic inflammation may cause pericytes – specialized cells that sit atop brain capillaries – to detach, allowing toxic compounds and immune cells to enter the brain, causing neuroinflammation. DHA, an omega-3 fatty acid, which might help protect the blood-brain barrier, relies on a protein called Mfsd2a to transport it to the brain.”

“People with at least one APOE4 allele are more susceptible to blood-brain barrier breakdown, which contributes to Alzheimer's disease development. APOE4 promotes the destruction of the blood-brain barrier by triggering the inflammatory cyclophilin A cascade.”

“Permeability of the blood-brain barrier is also modulated by the types of lipids used to create neurovascular membranes. For example, unsaturated fats make membranes less compact and more fluid, while saturated fats create rigid membranes that are less efficient at nutrient and waste exchange.”

“Previous research in animals demonstrates that chronic excessive alcohol exposure increases intestinal permeability, endotoxemia, and liver inflammation. Chronic mild endotoxemia increases inflammation in TLR4 sensing tissues, such as the blood vessels that comprise the blood-brain barrier.”