Peroxisome Deficiency Impairs BDNF Signaling and Memory.

Peroxisome Deficiency Impairs BDNF Signaling and Memory.
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DOI:
10.3389/fcell.2020.567017
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发表时间:
2020
影响因子:
5.5
通讯作者:
Fujiki Y
Fujiki Y
中科院分区:
生物学2区
文献类型:
--
作者:
Abe Y;Nishimura Y;Nakamura K;Tamura S;Honsho M;Udo H;Yamashita T;Fujiki Y

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过氧化物酶体是一种细胞内的细胞器,其在包括极长链脂肪酸的β-氧化和缩醛磷脂的生物合成的基本代谢途径中起作用。过氧化物酶体生物合成障碍(Peroxisome biogenesis disorders,PBDs)是一种严重的多器官功能障碍,包括中枢神经系统(central nervous system,CNS),其发病机制尚不清楚。我们最近报道过,过氧化物酶体缺陷的神经细胞分泌的脑源性神经营养因子(BDNF)的水平增加,导致小脑畸形。过氧化物酶体在成年脑中的功能研究较少。为了诱导成年期脑内过氧化物酶体缺乏,我们建立了他莫昔芬诱导的条件性Pex 2基因敲除小鼠。Pex 2基因敲除成年小鼠脑内过氧化物酶体缺乏可诱导海马BDNF及其失活受体TrkB-T1表达上调,从而导致记忆障碍。我们的研究结果表明,过氧化物酶体缺乏引起的海马电路功能障碍,通过受损的BDNF信号转导。
Peroxisome is an intracellular organelle that functions in essential metabolic pathways including β-oxidation of very-long-chain fatty acids and biosynthesis of plasmalogens. Peroxisome biogenesis disorders (PBDs) manifest severe dysfunction in multiple organs including central nervous system (CNS), whilst the pathogenic mechanisms are largely unknown. We recently reported that peroxisome-deficient neural cells secrete an increased level of brain-derived neurotrophic factor (BDNF), resulting in the cerebellar malformation. Peroxisomal functions in adulthood brain have been little investigated. To induce the peroxisome deficiency in adulthood brain, we here established tamoxifen-inducible conditional Pex2-knockout mouse. Peroxisome deficiency in the conditional Pex2-knockout adult mouse brain induces the upregulated expression of BDNF and its inactive receptor TrkB-T1 in hippocampus, which notably results in memory disturbance. Our results suggest that peroxisome deficiency gives rise to the dysfunction of hippocampal circuit via the impaired BDNF signaling.
DOI: 10.1016/j.bbamcr.2008.05.018
发表时间: 2008-10-01
影响因子: 5.1
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影响因子: 2.7
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