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Iranian Journal of Medical Sciences، جلد ۵۱، شماره ۱، صفحات ۷۰-۷۶
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عنوان انگلیسی A Novel AP4M1 Variant in an Iranian Child with Spastic Paraplegia 50: A Case Report and Molecular Docking Approach
چکیده انگلیسی مقاله Spastic paraplegia 50 (SPG50) is a rare autosomal recessive disorder caused by mutations in the AP4M1 gene (OMIM 602296). It is characterized by spasticity, severe intellectual disability, and delayed or absent speech. The present study reported a case from consanguineous parents, where the affected child presented with intellectual disability, seizures, muscle weakness, and deep white matter hyperintensity. Whole exome sequencing (WES) of the proband identified a novel, homozygous frameshift variant, c.258delG:p.A87Pfs*44, in the AP4M1 gene, which was confirmed by Sanger sequencing. This variant is predicted to cause a large truncation of the protein, leading to a loss of function. Molecular modeling and docking analyses further revealed that the loss of a substantial protein segment disrupts proper intramolecular interactions. A review of the literature on Iranian families with SPG50 yielded few reports, consistent with the disease’s rarity. This study expanded the knowledge of the clinical and genetic features of SPG50 and underscored the importance of this variant for genetic diagnosis and counseling in affected families.
کلیدواژه‌های انگلیسی مقاله Hereditary spastic paraplegia,Frameshift mutation,Whole exome sequencing
نویسندگان مقاله Hamed Esmaeil Lashgarian |
Department of Medical Genetics and Biotechnology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran

Masumeh Jalalvand |
Department of Medical Biotechnology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran

Maryam Zand |
Department of Biotechnology and Molecular Medicine, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran

Amirmasoud Jalalvand |
Department of Medical Biotechnology, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran

Leila Abkhooie |
Department of Medical Biotechnology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Ira

Fatemeh Kazemisafa |
Clinical Research Development Center, Imam Khomeini and Mohammad Kermanshahi and Farabi Hospitals, Kermanshah University of Medical Sciences, Kermanshah, Iran

Hamidreza Khodadadi |
Department of Medical Biotechnology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran

نشانی اینترنتی https://ijms.sums.ac.ir/article_51466_523e920bf3797cc4f27ee258d6a785c9.pdf
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