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Majed OAK, Majed FO, Almoamen NJ, Alsatrawi HB, Shehabi SD, Hrbková J, Libik M, Macek M. Distribution of pathogenic variants in the CFTR gene in a representative cohort of people with cystic fibrosis in the Kingdom of Bahrain. Mol Genet Genomics 2024; 299:52. [PMID: 38744777 PMCID: PMC11093839 DOI: 10.1007/s00438-024-02119-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 01/25/2024] [Indexed: 05/16/2024]
Abstract
BACKGROUND Cystic fibrosis (CF) is a rare multi-systemic recessive disorder. The spectrum and the frequencies of CFTR mutations causing CF vary amongst different populations in Europe and the Middle East. In this study, we characterised the distribution of CF-causing mutations (i.e. pathogenic variants in the CFTR gene) in a representative CF cohort from the Kingdom of Bahrain based on a three-decade-long analysis at a single tertiary centre. We aim to improve CF genetic diagnostics, introduce of CF neonatal screening and provide CFTR modulator therapy (CFTRm). METHODS CFTR genotyping and associated clinical information were drawn from a longitudinal cohort. We sequenced 56 people with CF (pwCF) that had one or both CFTR mutations unidentified and carried out comprehensive bioinformatic- and family-based segregation analyses of detected variants, including genotype-phenotype correlations and disease incidence estimates. The study methodology could serve as a basis for other non-European CF populations with a high degree of consanguinity. RESULTS Altogether 18 CF-causing mutations were identified, 15 of which were not previously detected in Bahrain, accounting for close to 100% of all population-specific alleles. The most common alleles comprise c.1911delG [2043delG; 22.8%], c.2988+1G > A [3120+1G>A; 16.3%], c.2989-1G>A [3121-1G>A; 14.1%], c.3909C>G [N1303K; 13.0%], and c.1521_1523delCTT [p.PheF508del; 7.6%]. Although the proportion of 1st cousin marriages has decreased to 50%, the frequency of homozygosity in our pwCF is 67.4%, thereby indicating that CF still occurs in large, often related, families. pwCF in Bahrain present with faltering growth, pancreatic insufficiency and classical sino-pulmonary manifestations. Interestingly, two pwCF also suffer from sickle cell disease. The estimated incidence of CF in Bahrain based on data from the last three decades is 1 in 9,880 live births. CONCLUSION The most commonCF-causing mutations in Bahraini pwCF were identified, enabling more precise diagnosis, introduction of two-tier neonatal screening and fostering administration of CFTRm.
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Affiliation(s)
- Osama A Karim Majed
- Salmaniya Medical Complex, Rd. No. 2904, Manama, Kingdom of Bahrain.
- Royal University of Surgeons in Ireland, Medical University of Bahrain, Al Sayh Muharraq Governorate, Busaiteen, Kingdom of Bahrain.
| | - Fatema Osama Majed
- Royal University of Surgeons in Ireland, Medical University of Bahrain, Al Sayh Muharraq Governorate, Busaiteen, Kingdom of Bahrain
| | | | | | - Salma Dawood Shehabi
- Department of Pediatrics, University Hospital in Coventry and Warwickshire, Coventry, United Kingdom
| | - Jana Hrbková
- Department of Biology and Medical Genetics, 2nd Faculty of Medicine and Motol University Hospital, Charles University, Prague, Czechia
| | - Malgorzata Libik
- Department of Biology and Medical Genetics, 2nd Faculty of Medicine and Motol University Hospital, Charles University, Prague, Czechia
| | - Milan Macek
- Department of Biology and Medical Genetics, 2nd Faculty of Medicine and Motol University Hospital, Charles University, Prague, Czechia
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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] [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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Reporting Two Novel Mutations in Two Iranian Families with Cystic Fibrosis, Molecular and Bioinformatic Analysis. IRANIAN BIOMEDICAL JOURNAL 2022; 26:398-405. [PMID: 35468710 PMCID: PMC9763878 DOI: 10.52547/ibj.3713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Cystic fibrosis (CF) is the most common heredity disease among the Caucasian population. More than 350 known pathogenic variations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene (NM_000492.4) cause CF. Herein, we report the outcome of our investigation in two unrelated Iranian families with CF patients. Methods We conducted phenotypic examination, segregation, linkage analysis, and CFTR gene sequencing to define causative mutations. Results We found two novel mutations in the present study. The first one was a deletion causing frameshift, c.299delT p.(Leu100Profs*7), and the second one was a missense mutation, c.1857G>T, at nucleotide binding domain 1 of the CFTR protein. Haplotype segregation data supported our new mutation findings. Conclusion Findings of this study expand the spectrum of CFTR pathogenic variations and can improve prenatal diagnosis and genetic counseling for CF.
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Alibakhshi R, Mohammadi A, Khamooshian S, Kazeminia M, Moradi K. CFTR gene mutation spectrum among 735 Iranian patients with cystic fibrosis: A comprehensive systematic review. Pediatr Pulmonol 2021; 56:3644-3656. [PMID: 34525262 DOI: 10.1002/ppul.25647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 08/06/2021] [Accepted: 08/25/2021] [Indexed: 01/17/2023]
Abstract
In this study, the spectrum and frequency of cystic fibrosis transmembrane conductance regulator (CFTR) gene mutations previously reported among Iranian cystic fibrosis (CF) patients have been reviewed and discussed. Using the keywords of Cystic Fibrosis, CF, CFTR, and Iran, along with their Persian equivalents, a comprehensive search was performed on the online databases. After applying the inclusion and exclusion criteria, 16 articles with an overall sample of 735 Iranian patients with CF, were included in this systematic review. A total of 101 different CFTR gene variants had been reported. The mutation of p.Phe508del (c.1521_1523delCTT) (21.22%) was the most frequent one among Iranian patients with CF. In conclusion, due to the fact that in many provinces of Iran no specific study has been done so far, it seems that the CFTR gene mutation spectrum in patients with CF from Iran is much wider.
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Affiliation(s)
- Reza Alibakhshi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Aboozar Mohammadi
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Sahand Khamooshian
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohsen Kazeminia
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Keivan Moradi
- Department of Biochemistry, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Kringel D, Malkusch S, Kalso E, Lötsch J. Computational Functional Genomics-Based AmpliSeq™ Panel for Next-Generation Sequencing of Key Genes of Pain. Int J Mol Sci 2021; 22:ijms22020878. [PMID: 33467215 PMCID: PMC7830224 DOI: 10.3390/ijms22020878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/27/2020] [Accepted: 01/12/2021] [Indexed: 11/16/2022] Open
Abstract
The genetic background of pain is becoming increasingly well understood, which opens up possibilities for predicting the individual risk of persistent pain and the use of tailored therapies adapted to the variant pattern of the patient's pain-relevant genes. The individual variant pattern of pain-relevant genes is accessible via next-generation sequencing, although the analysis of all "pain genes" would be expensive. Here, we report on the development of a cost-effective next generation sequencing-based pain-genotyping assay comprising the development of a customized AmpliSeq™ panel and bioinformatics approaches that condensate the genetic information of pain by identifying the most representative genes. The panel includes 29 key genes that have been shown to cover 70% of the biological functions exerted by a list of 540 so-called "pain genes" derived from transgenic mice experiments. These were supplemented by 43 additional genes that had been independently proposed as relevant for persistent pain. The functional genomics covered by the resulting 72 genes is particularly represented by mitogen-activated protein kinase of extracellular signal-regulated kinase and cytokine production and secretion. The present genotyping assay was established in 61 subjects of Caucasian ethnicity and investigates the functional role of the selected genes in the context of the known genetic architecture of pain without seeking functional associations for pain. The assay identified a total of 691 genetic variants, of which many have reports for a clinical relevance for pain or in another context. The assay is applicable for small to large-scale experimental setups at contemporary genotyping costs.
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Affiliation(s)
- Dario Kringel
- Institute of Clinical Pharmacology, Goethe-University, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany; (D.K.); (S.M.)
| | - Sebastian Malkusch
- Institute of Clinical Pharmacology, Goethe-University, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany; (D.K.); (S.M.)
| | - Eija Kalso
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, P.O. Box 440, 00029 HUS Helsinki, Finland;
| | - Jörn Lötsch
- Institute of Clinical Pharmacology, Goethe-University, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany; (D.K.); (S.M.)
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor-Stern-Kai 7, 60596 Frankfurt am Main, Germany
- Correspondence: ; Tel.: +49-69-6301-4589; Fax: +49-69-6301-4354
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Ziyaee F, Dehghani SM, Hosseini S, Zohalinezhad ME, Aleyasin S, Javaherizadeh H. Clinical manifestation, laboratory findings, and outcome of children with cystic fibrosis over a 10-year period in South Iran. EGYPTIAN PEDIATRIC ASSOCIATION GAZETTE 2020. [DOI: 10.1186/s43054-020-00045-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Cystic fibrosis (CF) is a monogenic hereditary disease with diverse complications, which substantially reduce the quality of life and longevity of patients. With regard to the scarcity of information on epidemiological aspects of this disease in Iran, we aimed to examine the current status of pediatric CF patients in a tertiary referral center in south Iran.
Results
Medical records of 105 patients (51% female) with the mean age of 16.3 ± 34.4 months were reviewed. Twelve patients (13.3%) had siblings with CF. Failure to thrive and respiratory symptoms were the most common presentations. Elevated liver enzymes and steatorrhea were detected in over half of tested patients, while abnormal serum albumin level, urinalysis, positive urine cultures, and positive acute phase reactants were noticed in less than half of the patients. Mild increase in pulmonary artery blood pressure was the most common finding of echocardiography. Increased liver echogenicity was the top finding of abdominopelvic sonography. Out of 42 available patients, 19 (45.2%) died with the mean age of 54.4 ± 101.8 months. The highest rate of mortality was observed in the 2–6 years old age group (42.9%).
Conclusion
Increased liver echogenicity was the most common finding in hepatobiliary evaluation. Mild increase in pulmonary artery blood pressure was the most common finding of echocardiography.
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Oliaei F, Batebi B, Tabaripour R, Akhavan Niaki H. Finding a very rare mutation in non-Caucasian LCAT patients from Southwest Asia for the first time. J Cell Biochem 2019; 120:7096-7100. [PMID: 30506915 DOI: 10.1002/jcb.27981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 10/04/2018] [Indexed: 01/24/2023]
Abstract
INTRODUCTION Lecithin cholesterol acyltransferase (LCAT) deficiency is an autosomal recessive disorder occurred by different mutations in the LCAT gene that cause two extremely rare syndromes including familial LCAT deficiency (FLD) and fish-eye disease (FED). Unlike FED in FLD renal failure is the most important defect due to deposition of abnormal lipoproteins in the renal stroma. In this study, FLD patients from the North of Iran were investigated for mutations in the LCAT gene. MATERIALS AND METHODS Eight patients with corneal opacification and renal defect were analyzed for mutations in the LCAT gene by PCR sequencing. RESULTS Sequencing analysis revealed a missense pathogenic variation c.301 G>A in exon 2 of LCAT gene in all patients changing the amino acid aspartate to asparagine at the conserved position of amino acid 101 of LCAT protein. CONCLUSION In this study, a very rare variation was reported for the first time in this part of the world. Investigation of a larger number of LCAT patients in different parts of Iran can provide availability of mutations panel that is useful for phenotype prediction and also prenatal diagnosis programming in families with a previous history of the disease.
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Affiliation(s)
- Farshid Oliaei
- Cellular and Molecular Biology Research Center, Health Research Institute. Clinical Research Center, Shahid Beheshti Hospital, Department of Internal Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Behdokht Batebi
- Department of Cellular and Molecular Biology, Islamic Azad University, Babol Branch, Iran
| | - Reza Tabaripour
- Department of Cellular and Molecular Biology, Islamic Azad University, Babol Branch, Iran
| | - Haleh Akhavan Niaki
- Genetic laboratory of Amirkola Children's Hospital, Babol University of Medical Sciences, Babol, Iran
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Molecular analysis of exon 13 of cystic fibrosis patients in Middle East: High frequency of K710X mutation. Meta Gene 2017. [DOI: 10.1016/j.mgene.2016.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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