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001-es BibID:	BIBFORM099925
035-os BibID:	(WOS)000516267700001 (Scopus)85079528822
Első szerző:	Kiss Tamás (vegyész)
Cím:	Nicotinamide mononucleotide (NMN) supplementation promotes neurovascular rejuvenation in aged mice : transcriptional footprint of SIRT1 activation, mitochondrial protection, anti-inflammatory, and anti-apoptotic effects / Kiss Tamas, Nyúl-Tóth Ádám, Balasubramanian Priya, Tarantini Stefano, Ahire Chetan, Yabluchanskiy Andriy, Csipo Tamas, Farkas Eszter, Wren Jonathan D., Garman Lori, Csiszar Anna, Ungvari Zoltan
Dátum:	2020
ISSN:	2509-2715 2509-2723
Megjegyzések:	Aging-induced structural and functional alterations of the neurovascular unit lead to impairment of neurovascular coupling responses, dysregulation of cerebral blood flow, and increased neuroinflammation, all of which contribute importantly to the pathogenesis of age-related vascular cognitive impairment (VCI). There is increasing evidence showing that a decrease in NAD+ availability with age plays a critical role in age-related neurovascular and cerebromicrovascular dysfunction. Our recent studies demonstrate that restoring cellular NAD+ levels in aged mice rescues neurovascular function, increases cerebral blood flow, and improves performance on cognitive tasks. To determine the effects of restoring cellular NAD+ levels on neurovascular gene expression profiles, 24-month-old C57BL/6 mice were treated with nicotinamide mononucleotide (NMN), a key NAD+ intermediate, for 2 weeks. Transcriptome analysis of preparations enriched for cells of the neurovascular unit was performed by RNA-seq. Neurovascular gene expression signatures in NMN-treated aged mice were compared with those in untreated young and aged control mice. We identified 590 genes differentially expressed in the aged neurovascular unit, 204 of which are restored toward youthful expression levels by NMN treatment. The transcriptional footprint of NMN treatment indicates that increased NAD+ levels promote SIRT1 activation in the neurovascular unit, as demonstrated by analysis of upstream regulators of differentially expressed genes as well as analysis of the expression of known SIRT1-dependent genes. Pathway analysis predicts that neurovascular protective effects of NMN are mediated by the induction of genes involved in mitochondrial rejuvenation, anti-inflammatory, and anti-apoptotic pathways. In conclusion, the recently demonstrated protective effects of NMN treatment on neurovascular function can be attributed to multifaceted sirtuin-mediated anti-aging changes in the neurovascular transcriptome. Our present findings taken together with the results of recent studies using mitochondria-targeted interventions suggest that mitochondrial rejuvenation is a critical mechanism to restore neurovascular health and improve cerebral blood flow in aging.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Aging Geroscience Mitochondria dysfunction Transcriptomics Vascular cognitive impairment
Megjelenés:	GeroScience. - 42 : 2 (2020), p. 527-546. -
További szerzők:	Nyúl-Tóth Ádám Balasubramanian, Priya Tarantini, Stefano Ahire, Chetan Yabluchanskiy, Andriy Csípő Tamás (1990-) Farkas Eszter Wren, Jonathan D. Garman, Lori Csiszár Anna Ungvári Zoltán
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