PMID- 25591419 OWN - NLM STAT- MEDLINE DCOM- 20160229 LR - 20181202 IS - 1743-1328 (Electronic) IS - 0161-6412 (Linking) VI - 37 IP - 6 DP - 2015 Jun TI - Protective effect of telmisartan on neurovascular unit and inflammasome in stroke-resistant spontaneously hypertensive rats. PG - 491-501 LID - 10.1179/1743132815Y.0000000002 [doi] AB - OBJECTIVES: Hypertension is a crucial risk factor for both stroke and dementia, including Alzheimer's disease (AD). We inspected the effect of telmisartan on the neurovascular unit (NVU) and related inflammatory responses in spontaneously hypertensive rat stroke resistant (SHR-SR) by observing the components of NVU such as N-acetyl glucosamine oligomer (NAGO), collagen IV, astrocytes, and matrix metalloproteinase-9 (MMP-9), as well as inflammasome NOD-like receptors family protein 3 (NLRP3). METHODS: In the present study, we examined the effect of a highly selective angiotensin type 1 (AT-1) antagonist of angiotensin 2 receptor with high lipid solubility, telmisartan, on NVU and related inflammatory responses in SHR-SR with a low dose (0.3 mg/kg/day) only for improving metabolic syndrome, and a high dose (3 mg/kg/day) for improving both metabolic syndrome and SHR-SR hypertension. RESULTS: Compared to normotensive Wistar rats, long-lasting hypertension in SHR-SR disrupted NVU by changing immunohistological components such as NAGO, collagen IV, astrocytes, and MMP-9. SHR-SR also strongly induced AD-related inflammasome NLRP3 in neuronal cells with age. However, such NVU disruption and inflammasome activation were greatly improved with dose-dependent telmisartan treatments. DISCUSSION: These results suggest that telmisartan comprehensively protected the NVU components by reducing inflammatory reactions relative to AD in hypertensive rats, which could also preclude the risk of AD under hypertension. FAU - Liu, Wentao AU - Liu W FAU - Yamashita, Toru AU - Yamashita T FAU - Kurata, Tomoko AU - Kurata T FAU - Kono, Syoichiro AU - Kono S FAU - Hishikawa, Nozomi AU - Hishikawa N FAU - Deguchi, Kentaro AU - Deguchi K FAU - Zhai, Yun AU - Zhai Y FAU - Abe, Koji AU - Abe K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150116 PL - England TA - Neurol Res JT - Neurological research JID - 7905298 RN - 0 (Angiotensin II Type 1 Receptor Blockers) RN - 0 (Anti-Inflammatory Agents) RN - 0 (Benzimidazoles) RN - 0 (Benzoates) RN - 0 (Carrier Proteins) RN - 0 (Glial Fibrillary Acidic Protein) RN - 0 (Inflammasomes) RN - 0 (NLR Family, Pyrin Domain-Containing 3 Protein) RN - 0 (Nlrp3 protein, rat) RN - 9007-34-5 (Collagen) RN - EC 3.4.24.35 (Matrix Metalloproteinase 9) RN - EC 3.4.24.35 (Mmp9 protein, rat) RN - U5SYW473RQ (Telmisartan) SB - IM MH - Aging/drug effects/metabolism MH - Angiotensin II Type 1 Receptor Blockers/*pharmacology MH - Animals MH - Anti-Inflammatory Agents/*pharmacology MH - Benzimidazoles/*pharmacology MH - Benzoates/*pharmacology MH - Carrier Proteins/metabolism MH - Cerebral Cortex/blood supply/drug effects/metabolism MH - Collagen/metabolism MH - Disease Models, Animal MH - Dose-Response Relationship, Drug MH - Glial Fibrillary Acidic Protein/metabolism MH - Hypertension/*drug therapy/metabolism MH - Immunohistochemistry MH - Inflammasomes/*drug effects/metabolism MH - Male MH - Matrix Metalloproteinase 9/metabolism MH - NLR Family, Pyrin Domain-Containing 3 Protein MH - Neurovascular Coupling/*drug effects/physiology MH - Rats, Inbred SHR MH - Rats, Wistar MH - Telmisartan OTO - NOTNLM OT - AD, OT - Hypertension, OT - Inflammasome, OT - Neurovascular unit, OT - SHR-SR, OT - Telmisartan EDAT- 2015/01/17 06:00 MHDA- 2016/03/02 06:00 CRDT- 2015/01/17 06:00 PHST- 2015/01/17 06:00 [entrez] PHST- 2015/01/17 06:00 [pubmed] PHST- 2016/03/02 06:00 [medline] AID - 10.1179/1743132815Y.0000000002 [doi] PST - ppublish SO - Neurol Res. 2015 Jun;37(6):491-501. doi: 10.1179/1743132815Y.0000000002. Epub 2015 Jan 16.