Deletion of Nampt in Projection Neurons of Adult Mice Leads to Motor Dysfunction, Neurodegeneration, and Death.
Deletion of Nampt in Projection Neurons of Adult Mice Leads to Motor Dysfunction, Neurodegeneration, and Death.
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DOI:
10.1016/j.celrep.2017.08.022
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发表时间:
2017-08-29
期刊:
影响因子:
8.8
通讯作者:
Ding S
中科院分区:
文献类型:
--
作者:
Wang X;Zhang Q;Bao R;Zhang N;Wang Y;Polo-Parada L;Tarim A;Alemifar A;Han X;Wilkins HM;Swerdlow RH;Wang X;Ding S
Intracellular nicotinamide phosphoribosyltransferase (iNAMPT) is the rate-limiting enzyme of the mammalian NAD+ biosynthesis salvage pathway. Using inducible and conditional knockout (cKO) mice, we show that Nampt gene deletion in adult projection neurons leads to a progressive loss of body weight, hypothermia, motor neuron (MN) degeneration, motor function deficits, paralysis, and death. Nampt deletion causes mitochondrial dysfunction, muscle fiber type conversion, and atrophy, as well as defective synaptic function at neuromuscular junctions (NMJs). When treated with nicotinamide mononucleotide (NMN), Nampt cKO mice exhibit reduced motor function deficits and prolonged lifespan. iNAMPT protein levels are significantly reduced in the spinal cord of amyotrophic lateral sclerosis (ALS) patients, indicating the involvement of NAMPT in ALS pathology. Our findings reveal that neuronal NAMPT plays an essential role in mitochondrial bioenergetics, motor function, and survival. Our study suggests that the NAMPT-mediated NAD+ biosynthesis pathway is a potential therapeutic target for degenerative MN diseases. Wang et al. find that projection neuron NAMPT is essential for mitochondrial bioenergetics, motor function, and survival of adult mice and that iNAMPT is reduced in ALS patients. NMN improves health and extends the lifespan of Nampt knockout mice. Their findings suggest therapeutic avenues for motor neuron degenerative diseases.
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影响因子:
29
作者:
Frederick DW;Loro E;Liu L;Davila A Jr;Chellappa K;Silverman IM;Quinn WJ 3rd;Gosai SJ;Tichy ED;Davis JG;Mourkioti F;Gregory BD;Dellinger RW;Redpath P;Migaud ME;Nakamaru-Ogiso E;Rabinowitz JD;Khurana TS;Baur JA
通讯作者:
Baur JA
影响因子:
4.6
作者:
Drougard A;Fournel A;Marlin A;Meunier E;Abot A;Bautzova T;Duparc T;Louche K;Batut A;Lucas A;Le-Gonidec S;Lesage J;Fioramonti X;Moro C;Valet P;Cani PD;Knauf C
通讯作者:
Knauf C
影响因子:
6.1
作者:
Choudhury GR;Ding S
通讯作者:
Ding S
DOI:
10.1111/dom.12171
发表时间:
2013-09
期刊:
Diabetes, obesity & metabolism
影响因子:
--
作者:
Imai S;Yoshino J
通讯作者:
Yoshino J
影响因子:
4.7
作者:
Bi J;Li H;Ye SQ;Ding S
通讯作者:
Ding S