PMID- 28432486 OWN - NLM STAT- MEDLINE DCOM- 20180423 LR - 20181113 IS - 1573-7365 (Electronic) IS - 0885-7490 (Print) IS - 0885-7490 (Linking) VI - 32 IP - 4 DP - 2017 Aug TI - Cholesterol as a modifying agent of the neurovascular unit structure and function under physiological and pathological conditions. PG - 935-948 LID - 10.1007/s11011-017-0015-3 [doi] AB - The brain, demanding constant level of cholesterol, precisely controls its synthesis and homeostasis. The brain cholesterol pool is almost completely separated from the rest of the body by the functional blood-brain barrier (BBB). Only a part of cholesterol pool can be exchanged with the blood circulation in the form of the oxysterol metabolites such, as 27-hydroxycholesterol (27-OHC) and 24S-hydroxycholesterol (24S-OHC). Not only neurons but also blood vessels and neuroglia, constituting neurovascular unit (NVU), are crucial for the brain cholesterol metabolism and undergo precise regulation by numerous modulators, metabolites and signal molecules. In physiological conditions maintaining the optimal cholesterol concentration is important for the energetic metabolism, composition of cell membranes and myelination. However, a growing body of evidence indicates the consequences of the cholesterol homeostasis dysregulation in several pathophysiological processes. There is a causal relationship between hypercholesterolemia and 1) development of type 2 diabetes due to long-term high-fat diet consumption, 2) significance of the oxidative stress consequences for cerebral amyloid angiopathy and neurodegenerative diseases, 3) insulin resistance on progression of the neurodegenerative brain diseases. In this review, we summarize the current state of knowledge concerning the cholesterol influence upon functioning of the NVU under physiological and pathological conditions. FAU - Czuba, Ewelina AU - Czuba E AUID- ORCID: 0000-0003-1519-6897 AD - Department of Anatomy and Neurobiology, Medical University of Gdansk, 1 Debinki Str, 80-211, Gdansk, Poland. ewelina.czuba@gumed.edu.pl. FAU - Steliga, Aleksandra AU - Steliga A AD - Department of Health Sciences, Pomeranian University of Slupsk, 64 Bohaterow Westerplatte Str, 76-200, Slupsk, Poland. FAU - Lietzau, Grazyna AU - Lietzau G AD - Department of Anatomy and Neurobiology, Medical University of Gdansk, 1 Debinki Str, 80-211, Gdansk, Poland. FAU - Kowianski, Przemyslaw AU - Kowianski P AD - Department of Anatomy and Neurobiology, Medical University of Gdansk, 1 Debinki Str, 80-211, Gdansk, Poland. AD - Department of Health Sciences, Pomeranian University of Slupsk, 64 Bohaterow Westerplatte Str, 76-200, Slupsk, Poland. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20170421 PL - United States TA - Metab Brain Dis JT - Metabolic brain disease JID - 8610370 RN - 97C5T2UQ7J (Cholesterol) SB - IM MH - Animals MH - Blood-Brain Barrier/*metabolism/pathology MH - Brain Diseases/*metabolism/pathology MH - Cholesterol/*metabolism MH - Humans MH - Nerve Degeneration/*metabolism/pathology MH - Neurons/metabolism/pathology PMC - PMC5504126 OTO - NOTNLM OT - Alzheimer's disease OT - Blood brain barrier OT - Cholesterol homeostasis OT - Neurodegeneration OT - Neurovascular unit OT - Oxysterols COIS- The authors declare that they have no conflict of interest. EDAT- 2017/04/23 06:00 MHDA- 2018/04/24 06:00 PMCR- 2017/04/21 CRDT- 2017/04/23 06:00 PHST- 2017/01/12 00:00 [received] PHST- 2017/04/17 00:00 [accepted] PHST- 2017/04/23 06:00 [pubmed] PHST- 2018/04/24 06:00 [medline] PHST- 2017/04/23 06:00 [entrez] PHST- 2017/04/21 00:00 [pmc-release] AID - 10.1007/s11011-017-0015-3 [pii] AID - 15 [pii] AID - 10.1007/s11011-017-0015-3 [doi] PST - ppublish SO - Metab Brain Dis. 2017 Aug;32(4):935-948. doi: 10.1007/s11011-017-0015-3. Epub 2017 Apr 21.