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排序方式: 共有94条查询结果,搜索用时 15 毫秒
1.
H Boyd J Kaste E Hovi U M Ritanen-Mohammed H Kriinen A de la Chapelle A E Lehesjoki 《Journal of medical genetics》1994,31(3):201-205
We describe two families in whom a pericentric inversion, inv(8)(p23q11), is segregating. No examples of unbalanced karyotypes were encountered. The families originated from neighbouring parishes in western Finland. In one family a mild form of mental retardation segregated. However, this phenotype did not cosegregate with the inversion karyotype. There was no evidence of a higher than average abortion rate in the inversion carriers. Carrier matings produced 19 children with a balanced inversion and 14 children with a normal karyotype, concordant with a 1:1 segregation ratio. Of 13 karyotyped men at risk, 10 were inversion carriers. However, this difference was not statistically different from the expected 1:1 ratio. In females, the inversion carrier to normal ratio was 10:11. 相似文献
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Hemophilia A: genetic prediction and linkage studies in all available families in Finland 总被引:1,自引:0,他引:1
Anna-Elina Lehesjoki Pertti Sistonen Vesa Rasi Albert de la Chapelle 《Clinical genetics》1991,39(3):199-209
RFLP studies were done in 82 (75%) of all known hemophilia A families in the Finnish population (approximately 5 million). Two intragenic RFLPs (Bc1I/F8A, XbaI/p482.6) and two extragenic markers (TaqI/St14, Bg1II/DX13) were used. Among 263 females at risk, carriership could be evaluated with an intragenic marker in 47% and with an extragenic marker in 26%. In 27% of the females, carriership could be neither excluded nor confirmed; 68% of these females were relatives of an isolated patient. Eight recombinations between the factor VIII gene (F8C) and DXS52 (lod 25.02 at theta max 0.06), eight recombinations between F8C and DXS15 (lod 21.91 at theta max 0.05), and two recombinations between DXS52 and DXS15 (lod 33.56 at theta max 0.01) were found. Using multipoint linkage analysis, the most likely order of loci supported by the data was: F8C-DXS15-DXS52-DXS134. RFLP segregation analysis provides a highly useful method of carrier detection and prenatal diagnosis of hemophilia A, but its limitations must be carefully taken into account. 相似文献
4.
X linked neonatal myotubular myopathy: one recombination detected with four polymorphic DNA markers from Xq28. 总被引:4,自引:2,他引:4
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A E Lehesjoki E M Sankila J Miao M Somer R Salonen J Rapola A de la Chapelle 《Journal of medical genetics》1990,27(5):288-291
A three generation family with X linked myotubular myopathy (MTM1) was studied with several polymorphic markers from the distal long arm of the X chromosome. A recombination between the disease gene and four markers (loci DXS52, DXS134, DXS15, F8C) from the Xq28 cluster was detected. A new polymorphic marker (U6.2) defining the locus DXS304 in the Xq27-28 region proximal to the Xq28 cluster did not show any recombination with MTM1. These results suggest the following order of loci in distal Xq: cen-DXS42-DXS105-(DXS304, MTM1)-(DXS52, DXS134, DXS15, F8C)-tel. 相似文献
5.
The neuronal ceroid lipofuscinosis CLN8 membrane protein is a resident of the endoplasmic reticulum 总被引:5,自引:0,他引:5
Progressive epilepsy with mental retardation (EPMR) is a new member of the neuronal ceroid lipofuscinoses (NCLs). The CLN8 gene underlying EPMR was recently identified. It encodes a novel 286 amino acid transmembrane protein that contains an endoplasmic reticulum (ER)-retrieval signal (KKRP) in its C-terminus. A homozygous mutation in the orthologous mouse gene (Cln8) underlies the phenotype of a naturally occurring NCL model, the motor neuron degeneration mouse (mnd). To characterize the product of the CLN8 gene and to determine its intracellular localization, we expressed CLN8 cDNA in BHK, HeLa and CHO cell lines. In western blotting and pulse-chase analyses an approximately 33 kDa protein that does not undergo proteolytic processing steps was detected. Using CLN8 and cell organelle specific antibodies with confocal immunofluorescence microscopy the CLN8 protein was shown to localize in the ER. Partial localization to the ER-Golgi intermediate compartment (ERGIC) was also observed. The ER-ERGIC localization was not altered in the CLN8 protein representing the EPMR mutation. However, mnd mutant protein was only found in the ER. Mutations in the ER retrieval signal KKRP resulted in localization of CLN8 to the Golgi apparatus. Taken together, these data strongly suggest that CLN8 is an ER resident protein that recycles between ER and ERGIC. 相似文献
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Doğanc T Yüksel Konuk BE Alpan N Konuk O Hämäläinen RH Lehesjoki AE Tekin M 《Clinical dysmorphology》2007,16(3):173-176
Mulibrey nanism is a rare autosomal-recessive disorder characterized by prenatal onset severe growth retardation and pericardial constriction associated with abnormalities of muscle, liver, brain and eye. More than 80% of previously reported patients are of Finnish origin in whom a founder mutation in the TRIM37 gene have been described. We report on a 7-year-old Turkish boy who presented with classical phenotypic features of mulibrey nanism. Mutation screening of the TRIM37 gene revealed that the proband had a homozygous two base pair deletion, c.1894_1895delGA, resulting in a frame-shift and a premature termination codon. Our proband is one of the rare examples of mulibrey nanism outside Finland and extends the mutation spectrum in this disorder. 相似文献
8.
Felicitas Becker Julian Schubert Pasquale Striano Anna-Kaisa Anttonen Elina Liukkonen Eija Gaily Christian Gerloff Stephan Müller Nicole Heußinger Christoph Kellinghaus Angela Robbiano Anne Polvi Simone Zittel Tim J. von Oertzen Kevin Rostasy Ludger Schöls Tom Warner Alexander Münchau Anna-Elina Lehesjoki Federico Zara Holger Lerche Yvonne G. Weber 《Journal of neurology》2013,260(5):1234-1244
Recent studies reported mutations in the gene encoding the proline-rich transmembrane protein 2 (PRRT2) to be causative for paroxysmal kinesigenic dyskinesia (PKD), PKD combined with infantile seizures (ICCA), and benign familial infantile seizures (BFIS). PRRT2 is a presynaptic protein which seems to play an important role in exocytosis and neurotransmitter release. PKD is the most common form of paroxysmal movement disorder characterized by recurrent brief involuntary hyperkinesias triggered by sudden movements. Here, we sequenced PRRT2 in 14 sporadic and 8 familial PKD and ICCA cases of Caucasian origin and identified three novel mutations (c.919C>T/p.Gln307*, c.388delG/p.Ala130Profs*46, c.884G>A/p.Arg295Gln) predicting two truncated proteins and one probably damaging point mutation. A review of all published cases is also included. PRRT2 mutations occur more frequently in familial forms of PRRT2-related syndromes (80–100 %) than in sporadic cases (33-46 %) suggesting further heterogeneity in the latter. PRRT2 mutations were rarely described in other forms of paroxysmal dyskinesias deviating from classical PKD, as we report here in one ICCA family without kinesigenic triggers. Mutations are exclusively found in two exons of the PRRT2 gene at a high rate across all syndromes and with one major mutation (c.649dupC) in a mutational hotspot of nine cytosines, which is responsible for 57 % of all cases in all phenotypes. We therefore propose that genetic analysis rapidly performed in early stages of the disease is highly cost-effective and can help to avoid further unnecessary diagnostic and therapeutic interventions. 相似文献
9.
Kinga Karlinger Ádám Domonkos Tárnoki Dávid László Tárnoki Anne Polvi Anna-Elina Lehesjoki Andrea Kelemen László Szegedi Eszter Turányi Anita Kamondi Anna Szűcs 《Journal of neurology》2014,261(10):1911-1916
We present a clinical, neuro-radiological and genetic study on a family with members suffering from an autosomal dominantly inherited syndrome characterised by epilepsy, cerebral calcifications and cysts, bone abnormalities; progressive neuro-cognitive deterioration and paranasal sinusitis. This syndrome shares several features with leukoencephalopathy with calcifications and cysts also called Labrune syndrome and the condition of cerebroretinal microangiopathy with calcifications and cysts (CRMCC; Coats plus syndrome). Genetic studies in this family did not reveal mutations in the CTC1 gene defected in CRMCC. We interpret our results as those supporting recent findings that despite clinical similarities, late-onset Labrune and Coats plus syndrome might be distinct entities. This family may have Labrune syndrome or a yet unclassified entity; exploration of similar cases could help classifying this one, and related conditions. 相似文献