Molecular genetic analysis of 16 XP‐C patients from Germany: environmental factors predominately contribute to phenotype variations
Molecular genetic analysis of 16 XP‐C patients from Germany: environmental factors predominately contribute to phenotype variations
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德国16例XPâC患者的分子遗传学分析:环境因素是导致表型变异的主要原因
DOI:
10.1111/exd.12052
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发表时间:
2012
影响因子:
3.6
通讯作者:
S. Emmert
中科院分区:
文献类型:
--
作者:
A. Schäfer;L. Hofmann;A. Gratchev;P. Laspe;S. Schubert;A. Schürer;A. Ohlenbusch;M. Tzvetkov;C. Hallermann;J. Reichrath;M. P. Schön;S. Emmert
Patients belonging to xeroderma pigmentosum (XP) complementation group C comprise one‐third of all XP patients. Only four major reports compiled larger groups of XP‐C patients from southern Europe (12 pts), North America (16 pts) and Africa (14 and 56 pts) as well as their genetic background (46XPCmutations). We identified 16 XP‐C patients from Germany. Interestingly, only five patients exhibited severe sun sensitivity. The mean age of XP diagnosis was 9.4 years, and the median age of the first skin cancer was 7 years. Neurological symptoms were absent in all but two patients. Primary fibroblasts from all 16 patients showed reduced post‐UV cell survival (mean: 50% vs 93% in normal cells) and reduced reactivation of an UV‐treated luciferase reporter gene (mean: 6.4% vs 30.7% in normal cells).XPCmRNA expression was also greatly reduced compared with normal cells (mean: 14.3%; range 8.3–25.7%) except in XP47MA (274.1%). All patients carried homozygousXPCmutations. Four mutations have been described previously: c.1747_1748delTG (found in 4/16), c.567 C>T (4/16), c.1839 C>T (1/16) and a complex insertion/deletion mutation in exon 9 (1/16). The novel frameshift mutations c.446_447delAG (2/16), c.1525insA (1/16) and c.2271delC (1/16) lead to truncated XPC proteins as does the novel nonsense mutation c.843C>T (1/16). XP47MA carries an interesting mutation (c.2538_2540delATC; p.Ile812del) resulting in an in‐frame single amino acid deletion. This mutation results in a classical XP phenotype, a non‐functional XPC protein, but elevatedXPCmRNA expression. Our study indicates that extrinsic factors may contribute to XP‐C symptom severity due to nonsense‐mediated message decay.
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DOI:
10.1038/sj.jid.5700452
发表时间:
2006
期刊:
The Journal of investigative dermatology
影响因子:
--
作者:
Emmert,Steffen;Wetzig,Tino;Imoto,Kyoko;Khan,SikandarG;Oh,Kyu-Seon;Laspe,Petra;Zachmann,Karolin;Simon,JanC;Kraemer,KennethH
通讯作者:
Kraemer,KennethH
DOI:
10.1016/0921-8777(90)90071-c
发表时间:
1990
期刊:
Mutation research
影响因子:
--
作者:
Kantor,GJ;Barsalou,LS;Hanawalt,PC
通讯作者:
Hanawalt,PC
影响因子:
4
作者:
Bradford PT;Goldstein AM;Tamura D;Khan SG;Ueda T;Boyle J;Oh KS;Imoto K;Inui H;Moriwaki S;Emmert S;Pike KM;Raziuddin A;Plona TM;DiGiovanna JJ;Tucker MA;Kraemer KH
通讯作者:
Kraemer KH
影响因子:
3.5
作者:
Ridley, AJ;Colley, J;Jones, CJ
通讯作者:
Jones, CJ
影响因子:
6.5
作者:
Emmert, S;Slor, H;Kraemer, KH
通讯作者:
Kraemer, KH