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Interactions of Lipids, Lipoproteins, and Apolipoproteins with the Blood-Brain Barrier.

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Lipids and lipoproteins are a diverse group of substances and their interactions with the blood-brain barrier (BBB) is similarly diverse. Some lipoproteins such as high density lipoprotein (HDL), apolipoprotein (apo)… Click to show full abstract

Lipids and lipoproteins are a diverse group of substances and their interactions with the blood-brain barrier (BBB) is similarly diverse. Some lipoproteins such as high density lipoprotein (HDL), apolipoprotein (apo) A-I, apoJ, some free fatty acids, and triglycerides cross the BBB whereas others such as apoE do not. Some forms of cholesterol can cross the BBB and others do not. Lipids can have effects on BBB preservation and function: HDL may protect the BBB during multiple sclerosis, cholesterol can disrupt the BBB, and triglycerides inhibit the transport of leptin across the BBB and the activation of the hypothalamic leptin receptor. ApoE is associated with many effects on the BBB, with the specific isoform apoE4 having detrimental effects. In summary, the diverse ways in which lipids, lipoproteins, and apolipoproteins interact with the BBB is important in both health and disease.

Keywords: blood brain; lipids lipoproteins; lipoproteins apolipoproteins; brain barrier

Journal Title: Pharmaceutical research
Year Published: 2021

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