Delay of photoreceptor degeneration in tubby mouse by sulforaphane

被引:62
作者
Kong, Li
Tanito, Masaki
Huang, Zhong
Li, Feng
Zhou, Xiaohong
Zaharia, Alexander
Yodoi, Junkie
McGinnis, James F.
Cao, Wei
机构
[1] Univ Oklahoma, Hlth Sci Ctr, Dept Ophthalmol, Oklahoma City, OK 73104 USA
[2] Univ Oklahoma, Hlth Sci Ctr, Dean A McGee Eye Inst, Oklahoma City, OK 73104 USA
[3] Dalian Med Univ, Dept Histoembryol, Dalian, Liaoning, Peoples R China
[4] Kyoto Univ, Inst Virus Res, Dept Biol Responses, Kyoto 606, Japan
[5] Univ Oklahoma, Hlth Sci Ctr, Dept Cell Biol, Oklahoma City, OK 73104 USA
[6] Univ Oklahoma, Hlth Sci Ctr, Oklahoma Ctr Neurosci, Oklahoma City, OK 73104 USA
[7] Univ Oklahoma, Hlth Sci Ctr, Dept Physiol, Oklahoma City, OK 73104 USA
关键词
extracellular signal-regulated kinases; hereditary retinal degeneration; nuclear factor E2 p45-related factor 2; sulforaphane; thioredoxin; tubby mouse;
D O I
10.1111/j.1471-4159.2007.04481.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
In this study, the homozygous tubby (tub/tub) mutant mouse, with an early progressive hearing loss and photoreceptor degeneration, was used as a model system to examine the effects of systemic administration of a naturally occurring isothiocyanate, sulforaphane (SF), on photoreceptor degeneration. Several novel observations have been made: (i) the mRNA and protein expression of thioredoxin (Trx), thioredoxin reductase (TrxR) and NF-E2-related factor-2 (Nrf2) were significantly reduced even prior to photoreceptor cell degeneration in the retinas of tub/tub mice, suggesting that retinal expression of the Trx system is impaired and that Trx regulation is involved in the pathogenesis of retinal degeneration in this model, (ii) intraperitoneal injection with SF significantly up-regulated retinal levels of Trx, TrxR, and Nrf2, and effectively protected photoreceptor cells in tub/tub mice as evaluated functionally by electroretinography and morphologically by quantitative histology, and (iii) treatment with PD98059, an inhibitor of extracellular signal-regulated kinases (ERKs), blocked SF-mediated ERKs activation and up-regulation of Trx/TrxR/Nrf2 in the retinas of tub/tub mice. This suggests that ERKs and Nrf2 are involved in the mechanism of SF-mediated up-regulation of the Trx system to protect photoreceptor cells in this model. These novel findings are significant and could provide important information for the development of a unique strategy to prevent sensorineural deafness/retinal dystrophic syndromes and also other forms of inherited neurological disorders.
引用
收藏
页码:1041 / 1052
页数:12
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