Spliceosome integrity is defective in the motor neuron diseases ALS and SMA.
Spliceosome integrity is defective in the motor neuron diseases ALS and SMA.
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DOI:
10.1002/emmm.201202303
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发表时间:
2013-02
影响因子:
11.1
通讯作者:
Yamanaka, Koji
中科院分区:
文献类型:
--
作者:
Tsuiji, Hitomi;Iguchi, Yohei;Furuya, Asako;Kataoka, Ayane;Hatsuta, Hiroyuki;Atsuta, Naoki;Tanaka, Fumiaki;Hashizume, Yoshio;Akatsu, Hiroyasu;Murayama, Shigeo;Sobue, Gen;Yamanaka, Koji
Two motor neuron diseases, amyotrophic lateral sclerosis (ALS) and spinal muscular atrophy (SMA), are caused by distinct genes involved in RNA metabolism, TDP-43 and FUS/TLS, and SMN, respectively. However, whether there is a shared defective mechanism in RNA metabolism common to these two diseases remains unclear. Here, we show that TDP-43 and FUS/TLS localize in nuclear Gems through an association with SMN, and that all three proteins function in spliceosome maintenance. We also show that in ALS, Gems are lost, U snRNA levels are up-regulated and spliceosomal U snRNPs abnormally and extensively accumulate in motor neuron nuclei, but not in the temporal lobe of FTLD with TDP-43 pathology. This aberrant accumulation of U snRNAs in ALS motor neurons is in direct contrast to SMA motor neurons, which show reduced amounts of U snRNAs, while both have defects in the spliceosome. These findings indicate that a profound loss of spliceosome integrity is a critical mechanism common to neurodegeneration in ALS and SMA, and may explain cell-type specific vulnerability of motor neurons.
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Cooper TA;Wan L;Dreyfuss G
通讯作者:
Dreyfuss G
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Chen-Plotkin, Alice S.;Lee, Virginia M. -Y.;Trojanowski, John Q.
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Trojanowski, John Q.
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Andres, C. R.
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Trojanowski, John Q.
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Coovert, DD;Le, TT;Burghes, AHM
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