Abstract
Abstract Persistent elevation of serum creatine kinase (CK) without any symptoms has been called idiopathic hyper CK-emia (IHCK). We examined a four-generation Japanese pedigree of familial IHCK. The multipoint linkage analysis of the pedigree showed seven clear peaks of logarithm of odds (LOD) scores (>1.4). By the exome sequencing followed by multiple filtering processes, we identified one novel heterozygous nonsynonymous single nucleotide variant (SNV), c.7034G>C, p.S2345T in the ryanodine receptor 1 gene, RYR1 cosegregated with IHCK in the pedigree. Mutation Taster predicted this substitution as "disease causing" (p = 0.999). The PolyPhen-2 and PANTHER subPSEC scores for the substitution are 0.911 (possibly damaging) and - 3.56 (probably damaging), respectively. We confirmed the absence of the SNV in 511 healthy Japanese individuals excluding the possibility of a normal variant with a very low frequency. Immunohistochemistry and Western blotting of biopsy samples consistently showed the expression level of RYR1 reduced in the patient. In real-time RT-PCR, the mRNA expression level of RYR1 was also significantly reduced in the patient (p = 0.009). These results suggest that the novel nonsynonymous SNV contribute to the vulnerability of the RYR1 protein through the dominant negative effect. We conclude that the SNV in the RYR1 gene is one of the responsible genes of IHCK.
| Original language | English |
|---|---|
| Article number | 13864 |
| Pages (from-to) | 142-147 |
| Number of pages | 6 |
| Journal | Journal of the Neurological Sciences |
| Volume | 356 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Sep 15 2015 |
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All Science Journal Classification (ASJC) codes
- Neurology
- Clinical Neurology
Cite this
A novel missense mutation of RYR1 in familial idiopathic hyper CK-emia. / Sano, Ken; Miura, Shiroh; Fujiwara, Toshiya; Fujioka, Ryuta; Yorita, Akiko; Noda, Kazuhito; Kida, Hiroshi; Azuma, Koichi; Kaieda, Shinjiro; Yamamoto, Ken; Taniwaki, Takayuki; Fukumaki, Yasuyuki; Shibata, Hiroki.
In: Journal of the Neurological Sciences, Vol. 356, No. 1-2, 13864, 15.09.2015, p. 142-147.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A novel missense mutation of RYR1 in familial idiopathic hyper CK-emia
AU - Sano, Ken
AU - Miura, Shiroh
AU - Fujiwara, Toshiya
AU - Fujioka, Ryuta
AU - Yorita, Akiko
AU - Noda, Kazuhito
AU - Kida, Hiroshi
AU - Azuma, Koichi
AU - Kaieda, Shinjiro
AU - Yamamoto, Ken
AU - Taniwaki, Takayuki
AU - Fukumaki, Yasuyuki
AU - Shibata, Hiroki
PY - 2015/9/15
Y1 - 2015/9/15
N2 - Abstract Persistent elevation of serum creatine kinase (CK) without any symptoms has been called idiopathic hyper CK-emia (IHCK). We examined a four-generation Japanese pedigree of familial IHCK. The multipoint linkage analysis of the pedigree showed seven clear peaks of logarithm of odds (LOD) scores (>1.4). By the exome sequencing followed by multiple filtering processes, we identified one novel heterozygous nonsynonymous single nucleotide variant (SNV), c.7034G>C, p.S2345T in the ryanodine receptor 1 gene, RYR1 cosegregated with IHCK in the pedigree. Mutation Taster predicted this substitution as "disease causing" (p = 0.999). The PolyPhen-2 and PANTHER subPSEC scores for the substitution are 0.911 (possibly damaging) and - 3.56 (probably damaging), respectively. We confirmed the absence of the SNV in 511 healthy Japanese individuals excluding the possibility of a normal variant with a very low frequency. Immunohistochemistry and Western blotting of biopsy samples consistently showed the expression level of RYR1 reduced in the patient. In real-time RT-PCR, the mRNA expression level of RYR1 was also significantly reduced in the patient (p = 0.009). These results suggest that the novel nonsynonymous SNV contribute to the vulnerability of the RYR1 protein through the dominant negative effect. We conclude that the SNV in the RYR1 gene is one of the responsible genes of IHCK.
AB - Abstract Persistent elevation of serum creatine kinase (CK) without any symptoms has been called idiopathic hyper CK-emia (IHCK). We examined a four-generation Japanese pedigree of familial IHCK. The multipoint linkage analysis of the pedigree showed seven clear peaks of logarithm of odds (LOD) scores (>1.4). By the exome sequencing followed by multiple filtering processes, we identified one novel heterozygous nonsynonymous single nucleotide variant (SNV), c.7034G>C, p.S2345T in the ryanodine receptor 1 gene, RYR1 cosegregated with IHCK in the pedigree. Mutation Taster predicted this substitution as "disease causing" (p = 0.999). The PolyPhen-2 and PANTHER subPSEC scores for the substitution are 0.911 (possibly damaging) and - 3.56 (probably damaging), respectively. We confirmed the absence of the SNV in 511 healthy Japanese individuals excluding the possibility of a normal variant with a very low frequency. Immunohistochemistry and Western blotting of biopsy samples consistently showed the expression level of RYR1 reduced in the patient. In real-time RT-PCR, the mRNA expression level of RYR1 was also significantly reduced in the patient (p = 0.009). These results suggest that the novel nonsynonymous SNV contribute to the vulnerability of the RYR1 protein through the dominant negative effect. We conclude that the SNV in the RYR1 gene is one of the responsible genes of IHCK.
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U2 - 10.1016/j.jns.2015.06.035
DO - 10.1016/j.jns.2015.06.035
M3 - Article
VL - 356
SP - 142
EP - 147
JO - Journal of the Neurological Sciences
JF - Journal of the Neurological Sciences
SN - 0022-510X
IS - 1-2
M1 - 13864
ER -