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Shojaei Z, Abiri M, Zafarghandi Motlagh F, Amini M, Dabbagh Bagheri S, Asnavandi S, Asadi S, Bagherian H, Zeinali S. First report of a patient with homozygous hemoglobin Ernz: Evidence to support a non-pathogenic variant. Blood Cells Mol Dis 2024; 104:102797. [PMID: 37826942 DOI: 10.1016/j.bcmd.2023.102797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023]
Abstract
Hemoglobin Ernz (Hb Ernz) is a missense variant in β-globin caused by a Threonine to Asparagine substitution at the 123rd amino acid position and HBB c.371C > A in gene level. Hb Ernz has been classified as Uncertain Significance (VUS) by ACMG due to limited reports and the absence of any homozygote genotypes. In our study, we found eight cases of Hb Ernz by DNA sequencing of the β-globin gene during >20 years of Thalassemia Screening in individuals with borderline hematological parameters who were possible carriers of thalassemia or their spouses. We also report the first homozygote variant of Hb Ernz. Our findings suggest that the changes in hematological parameters observed in individuals with Hb Ernz are likely due to α-globin gene mutations rather than Hb Ernz itself. These findings support the reclassification of Hb Ernz as a benign variant in variant classification.
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Affiliation(s)
- Zohreh Shojaei
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran
| | - Maryam Abiri
- Department of Medical Genetics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Fatemeh Zafarghandi Motlagh
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran
| | - Masoume Amini
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran
| | - Samira Dabbagh Bagheri
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran
| | - Sadaf Asnavandi
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran
| | - Sedighe Asadi
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran
| | - Hamideh Bagherian
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran
| | - Sirous Zeinali
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, 41 IRNA St., Vali Asr St., Tehran 1595645513, Iran..
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Hosseini Nami A, Kabiri M, Zafarghandi Motlagh F, Shirzadeh T, Fakhari N, Karimi A, Bagherian H, Jamali M, Younesikhah S, Shadman S, Zeinali R, Zeinali S. Genetic attributes of Iranian cystic fibrosis patients: the diagnostic efficiency of CFTR mutations in over a decade. Front Genet 2023; 14:1140034. [PMID: 37274793 PMCID: PMC10234504 DOI: 10.3389/fgene.2023.1140034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 04/10/2023] [Indexed: 06/07/2023] Open
Abstract
Objectives: Cystic fibrosis (CF) is the most prevalent autosomal recessive disorder among Caucasians. Mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene cause this pathology. We, therefore, aimed to describe the CFTR mutations and their geographical distribution in Iran. Method: The mutation spectrum for 87 families from all Iranian ethnicities was collected using ARMS PCR, Sanger sequencing, and MLPA. Results: Mutations were identified in 95.8% of cases. This dataset revealed that the most frequent mutations in the Iranian population were F508del, c.1000C>T, c.1397C>G, c.1911delG, and c.1393-1G>A. In addition, we found weak evidence for Turkey being the possible geographical pathway for introducing CFTR mutations into Iran by mapping the frequency of CFTR mutations. Conclusion: Our descriptive results will facilitate the genetic detection and prenatal diagnosis of cystic fibrosis within the Iranian population.
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Affiliation(s)
- Amin Hosseini Nami
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Mahboubeh Kabiri
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | | | - Tina Shirzadeh
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Negar Fakhari
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Ali Karimi
- Max Planck Institute for Brain Research, Frankfurt am Main, Germany
| | - Hamideh Bagherian
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Mojdeh Jamali
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Shahrzad Younesikhah
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Sara Shadman
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Razie Zeinali
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
- Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Sirous Zeinali
- Dr. Zeinali’s Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
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Jafari M, Karami F, Setoodeh A, Rahmanifar A, Bagherian H, Alaei MR, Rohani F, Zeinali S. Identification of Novel Mutations in the MMAA and MUT Genes among Methylmalonic Aciduria Families. Iran Biomed J 2023; 27:397-403. [PMID: 38158783 PMCID: PMC10826912 DOI: 10.61186/ibj.3782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 02/08/2023] [Indexed: 01/03/2024]
Abstract
Background Methylmalonic aciduria is a rare inherited metabolic disorder with autosomal recessive inheritance pattern. There are still MMA patients without known mutations in the responsible genes. This study aimed to identify mutations in Iranian MMA families using autozygosity mapping and NGS. Methods Multiplex PCR was performed on DNAs isolated from 12 unrelated MMA patients and their family members using 19 STR markers flanking MUT, MMAA, and MMAB genes, followed by Sanger sequencing. WES was carried out in the patients with no mutation. Results Haplotype analysis and Sanger sequencing revealed two novel, mutations, A252Vf*5 and G87R, within the MMAA and MUT genes, respectively. Three patients showed no mutations in either autozygosity mapping or NGS analysis. Conclusion High-frequency mutations within exons 2 and 3 of MUT gene and exon 7 of MMAB gene are consistent with the global expected frequency of genetic variations among MMA patients.
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Affiliation(s)
- Mahboobeh Jafari
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
- These authors were contributed equally in the present work
| | - Fatemeh Karami
- Department of Medical Genetics, Applied Biophotonics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
- These authors were contributed equally in the present work
| | - Aria Setoodeh
- Department of Pediatrics, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Rahmanifar
- Clinical and Research Unit, Iranian National Society for the Study of Inborn Errors of Metabolism, Tehran, Iran
| | | | - Mohammad Reza Alaei
- Department of Pediatric Endocrinology and Metabolism, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farzaneh Rohani
- Pediatric Growth and Development Research Center, Institute of Endocrinology and Metabolism, Iran University of Medical Science, Tehran, Iran
| | - Sirous Zeinali
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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Sardarpour N, Bagherian H, Zafarghandi Motlagh F, Shirzadeh T, Asnavandi S, Younesikhah S, Salehpour S, Setoodeh A, Alaei MR, Zeinali S. Mutational Analysis and Genotype Investigation of Less Known Gaucher Mutations through Haplotype Analysis in Iranian Gaucher Patients. Int J Mol Cell Med 2023; 12:40-50. [PMID: 37942259 PMCID: PMC10629722 DOI: 10.22088/ijmcm.bums.12.1.40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 11/10/2023]
Abstract
Gaucher's disease (GD) is the most frequent lysosomal storage disorder resulting from a deficiency of the enzyme glucocerebrosidase (GBA) which causes the accumulation of glucocerebroside. More than 500 mutations have been reported on the GBA gene so far. In this study, we aimed to investigate more on the genotype of less known mutations through haplotype analysis to explain their disease-causing inheritance. Eight patients and three carriers from nine different families were enrolled in the study. DNA sequencing of all GBA gene's exons was performed and pathogenicity of the mutations was investigated. Using GBA gene-linked STR markers, allele segregations were determined in some families. A total of six different mutations were determined. Five and three patients were identified to carry mutations in homozygous and compound heterozygote patterns respectively, three participants also were identified as carriers. The most prevalent mutations were c.1448 T>C and RecNcil, however, three less common mutations were identified (i.e., c.1223 C>T, c.1315 A>G, and c.1214 G>C). In conclusion, we evaluated six different mutations in Iranian patients and elucidated the inheritance of the three less-known mutations by linkage analysis.
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Affiliation(s)
- Negar Sardarpour
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran.
| | - Hamideh Bagherian
- Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, Iran.
| | | | - Tina Shirzadeh
- Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, Iran.
| | - Sadaf Asnavandi
- Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, Iran.
| | - Shahrzad Younesikhah
- Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, Iran.
| | - Shadab Salehpour
- Department of Pediatric Endocrinology and Metabolism, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Aria Setoodeh
- Growth and Development Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Mohammad Reza Alaei
- Department of Pediatric Endocrinology and Metabolism, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Sirous Zeinali
- Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, Iran.
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Keshvar Y, Sabeghi S, Sharifi Z, Fatemi KS, Fouladi P, Younesi Khah S, Rahiminejad F, Joudaki A, Amini M, Bagherian H, Ghaffari Novin M, Movahedin M, Mojbafan M, Zeinali S. A decade of molecular preimplantation genetic diagnosis of 350 blastomeres for beta-thalassemia combined with HLA typing, aneuploidy screening and sex selection in Iran. BMC Pregnancy Childbirth 2022; 22:330. [PMID: 35428248 PMCID: PMC9013130 DOI: 10.1186/s12884-022-04660-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 04/07/2022] [Indexed: 11/23/2022] Open
Abstract
Background Preimplantation genetic diagnosis (PGD) has been developed to detect genetic disorders before pregnancy which is usually done on blastomeres biopsied from 8-cell stage embryos obtained from in vitro fertilization method (IVF). Here we report molecular PGD results for diagnosing of beta thalassemia (beta-thal) which are usually accompanied with evaluating chromosomal aneuploidies, HLA typing and sex selection. Methods In this study, haplotype analysis was performed using short tandem repeats (STRs) in a multiplex nested PCR and the causative mutation was detected by Sanger sequencing. Results We have performed PGDs on 350 blastomeres from 55 carrier couples; 142 blastomeres for beta-thal only, 75 for beta-thal and HLA typing, 76 for beta-thal in combination with sex selection, and 57 for beta-thal and aneuploidy screening. 150 blastomeres were transferable, 15 pregnancies were happened, and 11 babies born. We used 6 markers for beta-thal, 36 for aneuploidy screening, 32 for sex selection, and 35 for HLA typing. To our knowledge combining all these markers together and the number of STR markers are much more than any other studies which have ever done. Conclusions PGD is a powerful diagnostic tool for carrier couples who desire to have a healthy child and wish to avoid medical abortion. Supplementary Information The online version contains supplementary material available at 10.1186/s12884-022-04660-9.
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Azadmehr S, Rahiminejad F, Zafarghandi Motlagh F, Jamali M, Ghazizadeh Tehrani P, Shirzadeh T, Bagherian H, Karimipoor M, Davoudi-Dehaghani E, Zeinali S. The Spectrum of Pathogenic Variants in Iranian Families with Hemophilia A. Arch Iran Med 2021; 24:887-896. [PMID: 35014236 DOI: 10.34172/aim.2021.133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 01/13/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND Hemophilia A (HA) is an X-linked recessive bleeding disorder with a high rate of genetic heterogeneity. The present study was conducted on a large cohort of Iranian HA patients and data obtained from databases. METHODS A total of 622 Iranian HA patients from 329 unrelated families who had been referred to a medical genetics laboratory in Tehran from 2005 to 2019, were enrolled in this retrospective, observational study. Genetic screening of pathogenic variants of the F8 gene was performed using inverse shifting PCR, direct sequencing, and multiplex ligation-dependent amplification (MLPA). Point mutation frequencies in different exons were analyzed for our samples as well as 6031 HA patients whose data were recorded in a database. RESULTS A total of 144 different pathogenic or likely pathogenic variants including 29 novel variants were identified. A strategy to decrease costs of genetic testing of HA was suggested based on this finding. CONCLUSION This study provides comprehensive information on F8 pathogenic/likely pathogenic variants in Iranian HA patients which improves the spectrum of causative mutations and can be helpful to clinicians and medical geneticists in counseling and molecular diagnosis of HA.
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Affiliation(s)
- Sarah Azadmehr
- Medical Genetics Lab of Dr. Zeinali, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Faezeh Rahiminejad
- Medical Genetics Lab of Dr. Zeinali, Kawsar Human Genetics Research Center, Tehran, Iran
| | | | - Mojdeh Jamali
- Medical Genetics Lab of Dr. Zeinali, Kawsar Human Genetics Research Center, Tehran, Iran
| | | | - Tina Shirzadeh
- Medical Genetics Lab of Dr. Zeinali, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Hamideh Bagherian
- Medical Genetics Lab of Dr. Zeinali, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Morteza Karimipoor
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Elham Davoudi-Dehaghani
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Sirous Zeinali
- Medical Genetics Lab of Dr. Zeinali, Kawsar Human Genetics Research Center, Tehran, Iran
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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7
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Tran TT, Keller RB, Guillemyn B, Pepin M, Corteville JE, Khatib S, Fallah MS, Zeinali S, Malfait F, Symoens S, Coucke P, Witters P, Levtchenko E, Bagherian H, Nickerson DA, Bamshad MJ, Chong JX, Byers PH. Biallelic variants in MESD, which encodes a WNT-signaling-related protein, in four new families with recessively inherited osteogenesis imperfecta. HGG Adv 2021; 2:100051. [PMID: 35047842 PMCID: PMC8756491 DOI: 10.1016/j.xhgg.2021.100051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 08/13/2021] [Indexed: 12/02/2022] Open
Abstract
The bone disorder osteogenesis imperfecta (OI) is genetically heterogeneous. Most affected individuals have an autosomal dominant disorder caused by heterozygous variants in either of the type I collagen genes (COL1A1 or COL1A2). To date, two reports have linked Mesoderm Development LRP Chaperone (MESD) to autosomal recessive OI type XX. Four different biallelic pathogenic variants in MESD were shown to cause a progressively deforming phenotype, associated with recurrent fractures and oligodontia in five individuals in five families. Recently, compound heterozygosity for a frameshift predicted to lead to a premature termination codon in exon 2 of the 3-exon gene and a second frameshift in the terminal exon in MESD were detected in three stillbirths in one family with severe OI consistent with the neonatal lethal phenotype. We have identified four additional individuals from four independent families with biallelic variants in MESD: the earlier reported c.632dupA (p.Lys212Glufs∗19) and c.676C>T (p.Arg226∗)-which are associated with a severe form of OI-and one new pathogenic variant, c.603-606delTAAA (p.Asn201Lysfs∗15), which causes a neonatal lethal form of OI. MESD acts in the WNT signaling pathway, where it is thought to play a role in the folding of the WNT co-receptors low-density lipoprotein receptor-related proteins 5 and 6 (LRP5/LRP6) and in chaperoning their transit to the cell surface. Our report broadens the phenotypic and genetic spectrum of MESD-related OI, provides additional insight into the pathogenic pathways, and underscores the necessity of MESD for normal WNT signaling in bone formation.
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Affiliation(s)
- Thao T. Tran
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
| | - Rachel B. Keller
- Department of Pathology, University of Washington, Seattle, WA 98195, USA
| | - Brecht Guillemyn
- Center for Medical Genetics Ghent, Ghent University Hospital, Department of Biomolecular Medicine, Ghent, Belgium
| | - Melanie Pepin
- Department of Pathology, University of Washington, Seattle, WA 98195, USA
| | - Jane E. Corteville
- Department of Reproductive Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Samir Khatib
- GMDC Al Quds University, P.O. Box 5100, Abu Dis, Palestine
| | | | - Sirous Zeinali
- Department of Medical Genetics, Kawsar Human Genetics Research Center, Tehran, Iran
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Fransiska Malfait
- Center for Medical Genetics Ghent, Ghent University Hospital, Department of Biomolecular Medicine, Ghent, Belgium
| | - Sofie Symoens
- Center for Medical Genetics Ghent, Ghent University Hospital, Department of Biomolecular Medicine, Ghent, Belgium
| | - Paul Coucke
- Center for Medical Genetics Ghent, Ghent University Hospital, Department of Biomolecular Medicine, Ghent, Belgium
| | - Peter Witters
- Center for Metabolic Diseases, University Hospital Leuven, Department of Paediatric Gastroenterology, Hepatology, and Nutrition, Leuven, Belgium
| | - Elena Levtchenko
- University Hospital Leuven, Departments of Pediatric Nephrology and Development and Regeneration, Leuven, Belgium
| | - Hamideh Bagherian
- GMDC Al Quds University, P.O. Box 5100, Abu Dis, Palestine
- Department of Medical Genetics, Kawsar Human Genetics Research Center, Tehran, Iran
| | | | - Michael J. Bamshad
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Jessica X. Chong
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | | | - Peter H. Byers
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
- Department of Medicine (Medical Genetics), University of Washington, Seattle, WA 98195, USA
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Ghadamyari F, Heidari MM, Zeinali S, Khatami M, Merat S, Bagherian H, Rejali L, Ghasemi F. Mutational screening through comprehensive bioinformatics analysis to detect novel germline mutations in the APC gene in patients with familial adenomatous polyposis (FAP). J Clin Lab Anal 2021; 35:e23768. [PMID: 33769591 PMCID: PMC8128300 DOI: 10.1002/jcla.23768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/10/2021] [Accepted: 03/11/2021] [Indexed: 12/17/2022] Open
Abstract
Background Familial adenomatous polyposis (FAP) as a colon cancer predisposition syndrome is an autosomal‐dominant inherited condition and is diagnosed by the progress of hundreds or thousands of adenomatous colonic polyps in the colon. This study aims at the nature and effect of Adenomatous Polyposis Coli (APC) gene mutations in FAP tumorigenesis. Methods The genetic screening of 59 FAP Iranian patients in 10 families was performed by polymerase chain reactions and the direct sequencing of the entire coding exons of the APC gene. To do linkage haplotype analysis and multiplex PCR‐based microsatellite examination, six short tandem repeat loci were selected in this gene. To evaluate and predict the potentially deleterious effects, comprehensive bioinformatics pathogenicity assays were used. Results A total of 12 germline heterozygous and homozygous nucleotide variations were identified. They included two missense mutations, four nonsense mutations, which would lead to the truncated and nonfunctional protein products, four synonymous or silent variations, and two nucleotide deletions of 1 to 5 bp or frameshift mutations. In addition, three novel heterozygous nonsense mutations were found in exons 10, 14, and 15 of the gene. There was also p.Arg653Met as a novel heterozygote mutation in exon 14 of the gene. Conclusions Bioinformatics analysis and three‐dimensional structural modeling predicted that these missense and nonsense mutations generally are associated with the deleted or truncated domains of APC and have functional importance and mainly affected the APC protein. These findings may provide evidence for the progress of potential biomarkers and help to understand the role of the APC gene in FAP.
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Affiliation(s)
| | | | - Sirous Zeinali
- Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mehri Khatami
- Department of Biology, Faculty of Science, Yazd University, Yazd, Iran
| | - Shahin Merat
- Digestive Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamideh Bagherian
- Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Leili Rejali
- Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Farzaneh Ghasemi
- Department of Biology, Faculty of Science, Yazd University, Yazd, Iran
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Sharifi Z, Taheri M, Fallah MS, Abiri M, Golnabi F, Bagherian H, Zeinali R, Farahzadi H, Alborji M, Tehrani PG, Amini M, Asnavandi S, Hashemi M, Forouzesh F, Zeinali S. Comprehensive Mutation Analysis and Report of 12 Novel Mutations in a Cohort of Patients with Spinal Muscular Atrophy in Iran. J Mol Neurosci 2021; 71:2281-2298. [PMID: 33481221 DOI: 10.1007/s12031-020-01789-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 12/30/2020] [Indexed: 12/17/2022]
Abstract
Spinal muscular atrophies (SMAs) are a heterogeneous group of neuromuscular diseases characterized by loss of motor neurons, muscle weakness, hypotonia and muscle atrophy, with different modes of inheritance; however, the survival motor neuron 1 (SMN1) gene is predominantly involved. The aims of the current study were to clarify the genetic basis of SMA and determine the mutation spectrum of SMN1 and other associated genes, in order to provide molecular information for more accurate diagnosis and future prospects for treatment. We performed a comprehensive analysis of 5q SMA in 1765 individuals including 528 patients from 432 unrelated families with at least one child with suspected clinical presentation of SMA. Copy number variations of the SMN1 and SMN2 genes and linkage analysis were performed using multiplex ligation-dependent probe amplification (MLPA) and short tandem repeat (STR) markers linked to the SMN1 gene. Cases without mutation in the SMA locus on 5q were analyzed for the DNAJB2, IGHMBP2, SIGMAR1 and PLEKHG5 genes using linked STR markers. Sanger sequencing of whole genes was performed for cases with homozygous haplotypes. Whole-genome sequencing (WGS) and whole-exome analysis was conducted for some of the remaining cases. Mutations in the SMN1 gene were identified in 287 (66.43%) families including 269 patients (62.26%) with homozygous deletion of the entire SMN1 gene. Only one of the patients had a homozygous point mutation in the SMN1 gene. Among the remaining families, three families showed mutations in either the DNAJB2, SIGMAR1 or PLEKHG5 genes, which were linked using STR analysis and Sanger sequencing. From 10 families who underwent WGS, we found six homozygous point mutations in six families for either the TNNT1, TPM3, TTN, SACS or COL6A2 genes. Two mutations in the PLA2G6 gene were also found in another patient as compound heterozygous. This rather large cohort allowed us to identify genotype patterns in Iranian 5q SMA patients. The process of identifying 11 mutations (9 novel) in 9 different genes among non-5q SMA patients shows the diversity of genes involved in non-5q SMA in Iranians. Genotyping of patients with SMA is essential for prenatal and preimplantation genetic diagnosis (PGD), and may be very helpful for guiding treatment, with the advent of new, more effective, albeit very expensive, therapies. Also, combining linkage analysis was shown to be beneficial in many ways, including sample authenticity and segregation analysis, and for ruling out maternal cell contamination during prenatal diagnosis (PND).
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Affiliation(s)
- Zohreh Sharifi
- Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.,Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Mohammad Taheri
- Urogenital Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad-Sadegh Fallah
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Maryam Abiri
- Department of Medical Genetics and Molecular Biology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Golnabi
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Hamideh Bagherian
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Razieh Zeinali
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Hossein Farahzadi
- Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Marjan Alborji
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | | | - Masoume Amini
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Sadaf Asnavandi
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Mehrdad Hashemi
- Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Flora Forouzesh
- Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Sirous Zeinali
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran. .,Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.
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Zafarghandi Motlagh F, Fallah MS, Bagherian H, Shirzadeh T, Ghasri S, Dabbagh S, Jamali M, Salehi Z, Abiri M, Zeinali S. Molecular genetic diagnosis of Glanzmann syndrome in Iranian population; reporting novel and recurrent mutations. Orphanet J Rare Dis 2019; 14:87. [PMID: 31029159 PMCID: PMC6487065 DOI: 10.1186/s13023-019-1042-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 03/05/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Glanzmann thrombasthenia (GT) is a rare autosomal recessive abnormality of platelet aggregation with quantitative and/or qualitative abnormality of αIIbβ3 integrin. The αIIbβ3 is a platelet fibrinogen receptor, which is required for platelet aggregation, firm adhesion, and also spreading. The disease is more prevalent in the populations with a higher rate of consanguineous marriages as in some Middle Eastern populations including Iraq, Jordan, and Iran. Different types of mutations in ITGA2B and ITGB3 genes have been previously reported to cause the disease. RESULT In this study, 16 patients with the clinical diagnosis of GT were studied. Direct sequencing of the exons and exon-intron boundaries of the above genes revealed mutations in 14 patients (detection rate: 87.5%). Briefly, out of fifteen types of identified mutations, 14 were novel. Seven mutations in the ITGB3 gene included 4 missense [c.2T > C, c.155 G > T, c. 538 G > A, c.1990 G > T], one nonsense mutation [c.1303 G > T], a small deletion [c.1656_1658delCTC] and a deletion of one nucleotide [c.401delA]. Mutations in the ITGA2B were 8 different mutations consisting 2 missense [c.286 T > A, c.842 C > T], 2 deletions [c.1899 del T, c.189-319_236del], an insertion [c.1071_1072insG] and one splice site mutations [c.409-3 C > G], one synonymous mutation that might alter the normal splicing process [c.1392 A > G] and a nonsense mutation [c.1555 C > T]. The causative mutation in 2 patients remained unknown. Using long-range PCR and sequencing, we found a rather large deletion. The break point of this deletion covers 319 nt from the last part of the first intron and 48 nt from the beginning of the second exon of ITGA2B gene. The deletion was also detected in two unrelated patients with the same ethnicity. In addition, in silico analyses of novel mutations were performed. CONCLUSION There was no recurrent mutation in the studied population. This may be due to either small sample size or the heterogeneity of the studied population.
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Affiliation(s)
- F Zafarghandi Motlagh
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran
| | - M S Fallah
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran
| | - H Bagherian
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran
| | - T Shirzadeh
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran
| | - S Ghasri
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran
| | - S Dabbagh
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran
| | - M Jamali
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran
| | - Z Salehi
- Department of Biology, Pardis International, University of Guilan, Rasht, Iran
| | - M Abiri
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran. .,Department of Medical Genetics and Molecular Biology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - S Zeinali
- Dr. Zeinali's Medical Genetics Lab, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St, Tehran, 1595645513, Iran. .,Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.
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11
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Zeinali S, Davoudi-Dehaghani E, Mahdieh N, Shirkavand A, Bagherian H, DabbaghBagheri S. SLC26A4 pathogenic variants as a third cause of hearing loss: Role of three exons in DFNB4 deafness in Iran. Indian J Otol 2019. [DOI: 10.4103/indianjotol.indianjotol_36_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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12
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Shirzadeh T, Saeidian AH, Bagherian H, Salehpour S, Setoodeh A, Alaei MR, Youssefian L, Samavat A, Touati A, Fallah MS, Vahidnezhad H, Karimipoor M, Azadmehr S, Raeisi M, Bandehi Sarhadi A, Zafarghandi Motlagh F, Jamali M, Zeinali Z, Abiri M, Zeinali S. Molecular genetics of a cohort of 635 cases of phenylketonuria in a consanguineous population. J Inherit Metab Dis 2018; 41:1159-1167. [PMID: 30159852 DOI: 10.1007/s10545-018-0228-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 06/09/2018] [Accepted: 06/26/2018] [Indexed: 11/28/2022]
Abstract
Phenylketonuria (PKU) is an inborn error of amino acid metabolism caused by mutations in the phenylalanine hydroxylase (PAH) gene, characterized by intellectual deficit and neuropsychiatric complications in untreated patients with estimated frequency of about one in 10,000 to 15,000 live births. PAH deficiency can be detected by neonatal screening in nearly all cases with hyperphenylalaninemia on a heel prick blood spot. Molecular testing of the PAH gene can then be performed in affected family members. Herein, we report molecular study of 635 patients genetically diagnosed with PKU from all ethnicities in Iran. The disease-causing mutations were found in 611 (96.22%) of cases. To the best of our knowledge, this is the most comprehensive molecular genetics study of PKU in Iran, identifying 100 distinct mutations in the PAH gene, including 15 previously unreported mutations. Interestingly, we found unique cases of PKU with uniparental disomy, germline mosaicism, and coinheritance with another Mendelian single-gene disorder that provides new insights for improving the genetic counseling, prenatal diagnosis (PND), and/or pre-implantation genetic diagnosis (PGD) for the inborn error of metabolism group of disorders.
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Affiliation(s)
- Tina Shirzadeh
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Amir Hossein Saeidian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
- Genetic, Genomics and Cancer Biology PhD Program, Thomas Jefferson University, Philadelphia, PA, USA
| | - Hamideh Bagherian
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Shadab Salehpour
- Department of Pediatric Endocrinology and Metabolism, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Genomic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Aria Setoodeh
- Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pediatrics, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Alaei
- Department of Pediatric Endocrinology and Metabolism, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Youssefian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
- Genetic, Genomics and Cancer Biology PhD Program, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ashraf Samavat
- Genetics Office, CDC, Ministry of Health of Iran, Tehran, Iran
| | - Andrew Touati
- Drexel University College of Medicine, Philadelphia, PA, USA
| | - Mohammad-Sadegh Fallah
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Hassan Vahidnezhad
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Morteza Karimipoor
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Sarah Azadmehr
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Marzieh Raeisi
- Research Institute for Endocrine Science, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of cellular and molecular biology, Islamic Azad University North Tehran branch, Tehran, Iran
| | - Ameneh Bandehi Sarhadi
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | | | - Mojdeh Jamali
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Zahra Zeinali
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Maryam Abiri
- Department of Medical Genetics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Sirous Zeinali
- Kawsar Human Genetics Research Center, 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran.
- Department of Molecular Medicine, Biotech Research Center, Pasteur Institute of Iran, Tehran, Iran.
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13
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Shafaat M, Alaee MR, Rahmanifar A, Setoodeh A, Razzaghy-Azar M, Bagherian H, Bagheri SD, Zafarghandi Motlagh F, Hashemi M, Abiri M, Zeinali S. Autozygosity mapping of methylmalonic acidemia associated genes by short tandem repeat markers facilitates the identification of five novel mutations in an Iranian patient cohort. Metab Brain Dis 2018; 33:1689-1697. [PMID: 30022420 DOI: 10.1007/s11011-018-0277-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 06/20/2018] [Indexed: 11/30/2022]
Abstract
Isolated Methylmalonic acidemia/aciduria (MMA) is a group of inborn errors of metabolism disease which is caused by defect in methylmalonyl-CoA mutase (MCM) enzyme. The enzyme has a key function in the catabolism of branched chain amino acids (BCAA, isoleucine, and valine), methionine, and threonine. MCM is encoded by a single gene named "MUT". Other subtypes of MMA are caused by mutations in cblA (encoded by MMAA) and cblB (encoded by MMAB), which is involved in the synthesis of methylmalonyl-coenzyme A cofactor. Different types of mutations have been identified as the cause of MMA. However, the mutation spectrum of MMA in Iran has not been studied so far. Here, we aimed to investigate the MMA causative mutations in the Iranian population. Using STR (Short Tandem Repeat) markers, we performed autozygosity mapping to identify the potential pathogenic variants in 11 patients with clinical diagnosis of MMA. Nineteen STR markers which are linked to the MUT, MMAA and MMAB genes (the genes with known causative mutations in MMA) were selected for PCR-amplification using two recently designed multiplex PCR panels. Next, the families that were diagnosed with homozygous haplotypes for the candidate genes were directly sequenced. Five novel mutations (c.805delG, c.693delC, c.223A > T, c.668A > G and c.976A > G in MUT) were identified beside other 4 recurrent mutations (c.361insT in MUT, c.571C > T and c.197-1 G > T in MMAB and c.1075C > T in MMAA). In silico analyses were also performed to predict the pathogenicity of the identified variants. The mutation c.571C > T in MMAB was the most common mutation in our study.
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Affiliation(s)
- Mehdi Shafaat
- Department of Genetics, Islamic Azad University, Tehran Medical Sciences Branch, Tehran, Iran
| | - Mohammad Reza Alaee
- Pediatric Endocrinology and Metabolism, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Rahmanifar
- Iranian National Society for Study of Inborn Metabolic Diseases, Tehran, Iran
| | - Aria Setoodeh
- Department of Pediatrics, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Razzaghy-Azar
- Metabolic Disorders Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
- Hazrat Aliasghar Childrens Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Hamideh Bagherian
- Medical Genetics Laboratory, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Samira Dabbagh Bagheri
- Medical Genetics Laboratory, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Fatemeh Zafarghandi Motlagh
- Medical Genetics Laboratory, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran
| | - Mehrdad Hashemi
- Department of Genetics, Islamic Azad University, Tehran Medical Sciences Branch, Tehran, Iran
| | - Maryam Abiri
- Medical Genetics Laboratory, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran.
- Department of Medical Genetics and Molecular Biology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Sirous Zeinali
- Medical Genetics Laboratory, Kawsar Human Genetics Research Center, No. 41 Majlesi St., Vali Asr St., Tehran, 1595645513, Iran.
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Pasteur St., Tehran, Iran.
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14
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Mojbafan M, Nilipour Y, Tonekaboni SH, Bagheri SD, Bagherian H, Sharifi Z, Zeinali Z, Tavakkoly-Bazzaz J, Zeinali S. A rare form of limb girdle muscular dystrophy (type 2E) seen in an Iranian family detected by autozygosity mapping. J Neurogenet 2017; 30:1-4. [PMID: 27276190 DOI: 10.3109/01677063.2016.1141208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Sarcoglycanopathies (SGPs) constitute a subgroup of autosomal recessive limb girdle muscular dystrophies (LGMDs) which are caused by mutations in sarcoglycan (SGs) genes. SG proteins form a core complex consisting of α, β, γ and δ sarcoglycans which are encoded by SGCA, SGCB, SGCG and SGCD genes, respectively. Genetic defect, in any of these SG proteins, results in instability of the whole complex. This effect can be helpful in interpreting muscle biopsy results. Autozygosity mapping is a gene mapping approach which can be applied in large consanguineous families for tracking the defective gene in most autosomal recessive disorders. In the present study, we used autozygosity mapping, to find the gene responsible for muscular dystrophy. Proband was a 10-year-old boy referred to our center for ruling out DMD (Duchenne muscular dystrophy). According to the pedigree and clinical reports, we assessed him for SGPs. Haplotyping, using the four short tandem repeat (STR) markers for each of the SG genes, showed that the phenotype may segregate with SGCB gene; and observing two crossing overs which occurred within the gene suggested that the mutation might be in the first two exons of SGCB gene. Mutation analysis showed a 26 bp duplication (10 bp before the initiation codon till 13 bp after the ATG start codon). This will cause a frameshift in protein synthesis.
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Affiliation(s)
- Marzieh Mojbafan
- a Department of Molecular Medicine , Biotechnology Research Center, Pasteur Institute of Iran , Tehran , Iran ;,b Department of Medical Genetics , School of Medicine, Tehran University of Medical Sciences , Tehran , Iran
| | - Yalda Nilipour
- c Pediatric Pathology Research Center, Mofid Children's Hospital, Shahid Beheshti Medical University [SBMU] , Tehran , Iran
| | - Seyed Hasan Tonekaboni
- d Pediatric Neurology Center of Excellence, Department of Pediatric Neurology , Mofid Children Hospital, Faculty of Medicine, ShahidBeheshti Medical university , Tehran , Iran
| | | | | | | | - Zahra Zeinali
- e Kawsar Human Genetics Research Center , Tehran , Iran
| | - Javad Tavakkoly-Bazzaz
- b Department of Medical Genetics , School of Medicine, Tehran University of Medical Sciences , Tehran , Iran
| | - Sirous Zeinali
- a Department of Molecular Medicine , Biotechnology Research Center, Pasteur Institute of Iran , Tehran , Iran ;,e Kawsar Human Genetics Research Center , Tehran , Iran
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15
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Vahidnezhad H, Youssefian L, Saeidian AH, Touati A, Sotoudeh S, Abiri M, Barzegar M, Aghazadeh N, Mahmoudi H, Norouz-Zadeh S, Hamid M, Zahabiyon M, Bagherian H, Zeinali S, Fortina P, Uitto J. Multigene Next-Generation Sequencing Panel Identifies Pathogenic Variants in Patients with Unknown Subtype of Epidermolysis Bullosa: Subclassification with Prognostic Implications. J Invest Dermatol 2017; 137:2649-2652. [PMID: 28830826 DOI: 10.1016/j.jid.2017.07.830] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 07/12/2017] [Accepted: 07/28/2017] [Indexed: 11/20/2022]
Affiliation(s)
- Hassan Vahidnezhad
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Leila Youssefian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Saeidian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Andrew Touati
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Soheila Sotoudeh
- Department of Dermatology, Children's Medical Center, Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Abiri
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Kawsar Human Genetics Research Center, Tehran, Iran
| | | | - Nessa Aghazadeh
- Department of Dermatology, Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamidreza Mahmoudi
- Department of Dermatology, Razi Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Norouz-Zadeh
- Kawsar Human Genetics Research Center, Tehran, Iran; Department of Biology, Islamic Azad University, Arsanjan Branch, Arsanjan, Iran
| | - Mohammad Hamid
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mahla Zahabiyon
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | | | - Sirous Zeinali
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran; Kawsar Human Genetics Research Center, Tehran, Iran
| | - Paolo Fortina
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Department of Molecular Medicine, Sapienza University, Rome, Italy
| | - Jouni Uitto
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Jefferson Institute of Molecular Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.
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16
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Malbin J, Fallah MS, Sharifi Z, Shafaei M, Bagherian H, Mostafaei TP, Aliev R, Zainal S. Cryptic de novo deletion at 2q23.3-q24.1 in a patient with intellectual disability. J Genet 2016; 95:441-5. [PMID: 27350689 DOI: 10.1007/s12041-016-0630-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jamileh Malbin
- Azerbaijan National Academy of Science (ANAS), Genetic Resources Institute, Baku AZ1005, Azerbaijan.
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17
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Abiri M, Karamzadeh R, Karimipoor M, Ghadami S, Alaei MR, Bagheri SD, Bagherian H, Setoodeh A, Noori-Daloii MR, Sirous Zeinali. Identification of six novel mutations in Iranian patients with maple syrup urine disease and their in silico analysis. Mutat Res 2016; 786:34-40. [PMID: 26901124 DOI: 10.1016/j.mrfmmm.2016.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Revised: 01/12/2016] [Accepted: 01/22/2016] [Indexed: 01/09/2023]
Abstract
Maple syrup urine disease (MSUD) is a rare inborn error of branched-chain amino acid metabolism. The disease prevalence is higher in populations with elevated rate of consanguineous marriages such as Iran. Different types of disease causing mutations have been previously reported in BCKDHA, BCKDHB, DBT and DLD genes known to be responsible for MSUD phenotype. In this study, two sets of multiplex polymorphic STR (Short Tandem Repeat) markers linked to the above genes were used to aid in homozygosity mapping in order to find probable pathogenic change(s) in the studied families. The families who showed homozygote haplotype for the BCKDHA gene were subsequently sequenced. Our findings showed that exons 2, 4 and 6 contain most of the mutations which are novel. The changes include two single nucleotide deletion (i.e. c. 143delT and c.702delT), one gross deletion covering the whole exon four c.(375+1_376-1)_(8849+1_885-1), two splice site changes (c.1167+1G>T, c. 288+1G>A), and one point mutation (c.731G>A). Computational approaches were used to analyze these two novel mutations in terms of their impact on protein structure. Computational structural modeling indicated that these mutations might affect structural stability and multimeric assembly of branched-chain α-keto acid dehydrogenase complex (BCKDC).
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Affiliation(s)
- Maryam Abiri
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Razieh Karamzadeh
- Department of Molecular Systems Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Biophysics, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Morteza Karimipoor
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Shirin Ghadami
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Reza Alaei
- Pediatric Endocrinology and Metabolism, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samira Dabagh Bagheri
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Hamideh Bagherian
- Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran
| | - Aria Setoodeh
- Department of Pediatrics, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Sirous Zeinali
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran; Dr. Zeinali's Medical Genetics Laboratory, Kawsar Human Genetics Research Center, Tehran, Iran.
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Foroozani H, Abiri M, Salehpour S, Bagherian H, Sharifi Z, Alaei MR, Khatami S, Azadmeh S, Setoodeh A, Rejali L, Rohani F, Zeinali S. Molecular Characterization of QDPR Gene in Iranian Families with BH4 Deficiency: Reporting Novel and Recurrent Mutations. JIMD Rep 2015; 21:123-8. [PMID: 26006720 DOI: 10.1007/8904_2015_441] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 04/08/2015] [Accepted: 04/10/2015] [Indexed: 04/03/2023] Open
Abstract
Newborn screening for PKU has been in practice in Iran since 2007. Some hyperphenylalaninemia cases have tetrahydrobiopterin (BH4) biosynthesis deficiency/disorder. Several genes including QDPR (encodes DHPR enzyme, the necessary cofactor for PAH activity) have been associated with the BH4. Mutations have been previously described in the QDPR gene. The incidence of BH4 deficiency is expected to be higher in Iran due to high rate of consanguineous marriages.We identified a total of 93 BH4-deficient families. A multiplex set of STR markers linked to 4 genes responsible for the BH4 deficiency (i.e., GCH1, PCBD1, PTS, and QDPR genes) was used to quickly determine which gene may be responsible to cause the disease. Mutation analysis of QDPR gene revealed some known and novel mutations. Our findings show that no common mutation predominates, and they are scattered in the gene in our population.
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Affiliation(s)
- Hannaneh Foroozani
- Department of Biology, Pharmaceutical Science Branch, Islamic Azad University, Tehran, Iran
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Davoudi-Dehaghani E, Fallah MS, Tavakkoly-Bazzaz J, Bagherian H, Zeinali S. Allelic heterogeneity among Iranian DFNB7/11 families: report of a new Iranian deaf family with TMC1 mutation identified by next-generation sequencing. Acta Otolaryngol 2015; 135:125-9. [PMID: 25423259 DOI: 10.3109/00016489.2014.969383] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSION Co-segregation of c.2030T>C mutation with hearing loss in an Iranian family and absence of this mutation in 100 Iranian controls confirms the pathogenicity of this mutation. Allelic heterogeneity among Iranian DFNB7/11 families has been shown by the identification of six different mutations in eight families. OBJECTIVES Transmembrane channel-like 1 (TMC1) gene encodes an integral membrane protein such that its mutations can cause DFNB7/11 hearing loss. To date, several TMC1 mutations have been reported from Iran. Here we report a new DFNB7/11 Iranian family with an unreported TMC1 mutation in Iran. METHODS A total of 66 genes related to hearing loss were analyzed using the OtoSCOPE platform in an affected member of an Iranian deaf family (Irn-Deaf-6866). Sanger sequencing was performed to confirm next-generation sequencing findings. RESULTS A mutation, c.2030T>C, was identified in exon 21 of the TMC1 gene in the investigated member of the family. Sequencing results in all members of the family confirmed association of this mutation with hearing loss. None of 100 ethnically matched healthy controls had this mutation.
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Davoudi-Dehaghani E, Fallah MS, Shirzad T, Tavakkoly-Bazzaz J, Bagherian H, Zeinali S. Reporting the presence of three different diseases causingGJB2mutations in a consanguineous deaf family. Int J Audiol 2013; 53:128-31. [DOI: 10.3109/14992027.2013.850748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Davoudi-Dehaghani E, Zeinali S, Mahdieh N, Shirkavand A, Bagherian H, Tabatabaiefar MA. A transversion mutation in non-coding exon 3 of the TMC1 gene in two ethnically related Iranian deaf families from different geographical regions; evidence for founder effect. Int J Pediatr Otorhinolaryngol 2013; 77:821-6. [PMID: 23523375 DOI: 10.1016/j.ijporl.2013.02.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 02/23/2013] [Accepted: 02/25/2013] [Indexed: 11/18/2022]
Abstract
OBJECTIVES Transmembrane channel-like 1 (TMC1) gene is a member of the transmembrane channel-like (TMC) gene family that encodes an integral membrane protein of the inner ear. It is suggested that mutation in this gene is one of the main causes of autosomal recessive non-syndromic hearing loss (ARNSHL) in different populations. The aim of this study was to determine the contribution of the TMC1 gene mutations in causing hearing loss in Iran. METHODS In total 54 unrelated Iranian families containing 159 affected individuals with ARNSHL detected by audiometric and otologic examinations were analyzed. Haplotype analysis of all members of 45 GJB2- & GJB6-negative families, using four microsatellite markers linked to DFNB7/11 was performed. RESULTS Co-segregation of hearing loss with all investigated markers for the DFNB7/11 locus was found in one family. DNA sequencing of all coding and non-coding exons and intron boundaries of the TMC1 gene identified c.-258A>C mutation in non-coding exon 3 only in individuals with hearing loss. This mutation has been previously reported in another Iranian family (G9) that share similar ethnicity. This variant was not detected in 300 ethnically matched healthy controls. CONCLUSIONS These results increase the probability that this nucleotide variation may be a pathogenic mutation. This study showed that the ethnicity may be more useful than geographical location to design research strategy for determining which genes should be considered when a heterogeneous disorder is under investigation.
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Affiliation(s)
- Elham Davoudi-Dehaghani
- Department of Molecular Medicine, Biotechnology Research Center, Pasteur Institute of Iran, Pasteur St., Tehran, Iran
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Zeinali S, Savadkoohi F, Farzad A, Bagherian H, Sarhadi S, Kianfar S, Azadmehr S, Valadi A, Sharifi Z. P-67 Early aneuploidy detection by means of QF-PCR using uterine fetal cell free DNA: A non-invasive approach. Reprod Biomed Online 2013. [DOI: 10.1016/s1472-6483(13)60130-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mahdieh N, Rabbani B, Shirkavand A, Bagherian H, Movahed ZS, Fouladi P, Rahiminejad F, Masoudifard M, Akbari MT, Zeinali S. Impact of Consanguineous Marriages in GJB2-Related Hearing Loss in the Iranian Population: A Report of a Novel Variant. Genet Test Mol Biomarkers 2011; 15:489-93. [DOI: 10.1089/gtmb.2010.0145] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Nejat Mahdieh
- Kawsar Human Genetic Research Center, Tehran, Iran
- Medical Genetic Group, Ilam University of Medical Sciences, Ilam, Iran
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Bahareh Rabbani
- Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Medical Genetic Group, Ghazvin University of Medical Sciences, Ghazvin, Iran
| | | | | | | | | | | | | | - Mohammad Taghi Akbari
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Sirous Zeinali
- Kawsar Human Genetic Research Center, Tehran, Iran
- Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
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Ahmadinejad Z, Bagherian H, Atarord L, Soodbakhsh A, Saheli G. Lymphocyte subsets, immunoglobulin levels, complement activity CH50, and phagocytic peroxide production in 19 Iranian patients with first episode of bacterial meningitis. J Microbiol Immunol Infect 2011; 44:83-7. [PMID: 21439508 DOI: 10.1016/j.jmii.2010.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 12/21/2009] [Accepted: 02/24/2010] [Indexed: 11/27/2022]
Abstract
BACKGROUND Despite the availability of potent antimicrobial drugs, bacterial meningitis remains a serious infection with significant morbidity and mortality. In many studies, pyogenic meningitis is reported in patients with immunoglobulin (Ig) and complement deficiencies. In the present study, a broad range of immunological tests were performed to determine the relative importance of primary immunodeficiency as a predisposing cause of first episode of pyogenic meningitis without any evidence of other major infections in past medical history. METHODS We studied 19 patients with bacterial meningitis confirmed by smear, culture, and cerebrospinal fluid parameters. Immunological tests were performed within 1 to 21 days of diagnosis. Twenty healthy adults served as controls. Serum Ig levels (IgA, IgG, IgM, IgE) and total hemolytic complement (CH5O) as screening tests were done. Lymphocytes, neutrophils, and T-cells were enumerated. Nitroblue tetrazolium test was used for the assessment of neutrophil function. RESULTS Thirteen patients were male and six were female. The mean age of the patients was 27.8 ± 19 years (range 5-73 years). One patient had subnormal IgA levels; five patients had subnormal IgE levels; one patient had lymphopenia and low CD4, CD3, and CD19; and one patient had subnormal IgM and IgE levels with lymphopenia and low CD4, CD3, CD8, and CD19 counts. All patients had normal complement components (C3 and C4), CH50, and nitroblue tetrazolium test. CONCLUSION The most common immunodeficiency in our study was Ig deficiency. Our results support the recommendation that immunological evaluation, especially Ig assay, should be used in patients with bacterial meningitis even in the first episode.
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Affiliation(s)
- Zahra Ahmadinejad
- Department of Infectious Diseases, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.
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Mahdieh N, Bagherian H, Shirkavand A, Sharafi M, Zeinali S. High level of intrafamilial phenotypic variability of non-syndromic hearing loss in a Lur family due to delE120 mutation in GJB2 gene. Int J Pediatr Otorhinolaryngol 2010; 74:1089-91. [PMID: 20609484 DOI: 10.1016/j.ijporl.2010.06.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2010] [Revised: 06/07/2010] [Accepted: 06/09/2010] [Indexed: 11/29/2022]
Abstract
Hearing loss is the most common sensory defect in the world. The genetic basis of this condition is very complex. Molecular variations in GJB2 gene are the common cause of hearing impairment in Caucasians. One expects that affected members of a family with same mutation have similar phenotype. Here, we report phenotypic variability in hearing loss among the members of a Lur family. Two brothers from a Lur family from Lurestan province in western Iran with variable degrees of nonsyndromic sensorineural hearing loss were evaluated for genetic counseling. Clinical examinations, audiological tests and molecular studies including GJB2 gene sequencing and detection of Delta(GJB6-D13S1830) deletion were performed. Sequencing analysis of GJB2 gene revealed delE120 mutation in both brothers in homozygous form. Since one of them was profoundly deaf and the other was mild hearing loss and had normal conversation, we were expecting different genotypes or other causative effects. Delta(GJB6-D13S1830) was not found. Phenotypic variability between members of different families with the same type of mutation can be expected which may be due to the role of different modifying factors, unrecognized gap junction isoforms, or polymorphism effects.
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Affiliation(s)
- Nejat Mahdieh
- Department of Medical Genetics, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Mahdieh N, Raeisi M, Shirkavand A, Bagherian H, Akbari MT, Zeinali S. Investigation of GJB6 large deletions in Iranian patients using quantitative real-time PCR. Clin Lab 2010; 56:467-471. [PMID: 21086793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND Hearing loss is a serious sensory defect in the world. Mutations in the GJB2 and GJB6 genes are the major causes of autosomal recessive nonsyndromic hearing loss (NSHL). Recently, three major large deletions in the GJB6 gene including del(GJB6-D13S1830), del(GJB6-D13S1854), and a > 920 kb deletion have been reported to form double heterozygosity with GJB2. This may suggest that deletions involving GJB6 may be responsible for some NSHL. METHODS We designed a real time SYBR green-based PCR to quantify a common deleted region in GJB6 gene. The amplified region covers the area which has been seen to be deleted in all of the above reports. We selected nine families heterozygous for different mutations in GJB2 gene to investigate the presence of deletions in the GJB6 gene. The samples were run along with controls for normal hearing and heterozygous and homozygous for GJB2 mutations to optimize our method. As a reference gene or external standard, a segment of the CLCN7 gene was also quantified as well. RESULTS We did not detect any deletion in the GJB6 gene. CONCLUSIONS Using this method, any deletion involving GJB6 gene can be detected in a rapid and sensitive way.
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Affiliation(s)
- Nejat Mahdieh
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Bagherian H, . ZA, . FAA. Hemorrhagic Pleural Effusion as a First Presentation of Chronic Lymphocytic Leukemia (A Case Report). J of Medical Sciences 2007. [DOI: 10.3923/jms.2007.710.712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Davoudi S, Amirzargar AA, Hajiabdolbaghi M, Rasoolinejad M, Soodbakhsh A, Jafari S, Piri H, Maleknejad P, Bagherian H, Madadi N, Nikbin B. Th-1 cytokines gene polymorphism in human brucellosis. Int J Immunogenet 2006; 33:355-9. [PMID: 16984280 DOI: 10.1111/j.1744-313x.2006.00626.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Brucellosis is a worldwide zoonosis. Infection with Brucella species results in the activation of cell-mediated immune response. The interaction between Th1and Th2 cytokines determines the outcome of disease. Production of each cytokine is in turn affected by genetic factors. In this study, we investigated the possible association between Th1 cytokines gene polymorphism and brucellosis. Different genotypes of TNF-alpha, IFN-gamma and IL-2 were determined by polymerase chain reaction-sequence-specific primer in 47 patients with brucellosis and in 166 healthy controls. Allele frequencies of these genotypes were compared using the chi2 test. The results showed a significant difference in the TNF-alpha genotype GG/GG in patients in comparison with controls (76.7% vs. 21%) (P = 0.001, OR = 12.42, 95%CI 5.7-27.7). There was no significant difference in the frequency distribution of the IFN-gamma genotypes between two groups. IL-2 GG genotype at position -330 was about two times more common in cases than in controls, but the difference was not significant (10.6 vs. 4.6 P value = 0.09). This study shows that genetically low producers of TNF-alpha are possibly susceptible to brucellosis and raise doubt about the role of gene polymorphism of INF-gamma in brucellosis which was demonstrated in previous studies. It seems that patients with brucellosis did not have a defect in producing IL-2 with even a trend towards producing higher amounts of this cytokine.
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Affiliation(s)
- S Davoudi
- Department of Infectious Diseases, Imam Hospital, Tehran University of Medical Sciences, Tehran, Iran
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