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Al Yafei Z, Hajjej A, Alvares M, Al Mahri A, Nasr A, Mirghani R, Al Obaidli A, Al Seiari M, Mack SJ, Askar M, Edinur HA, Almawi WY, ElGhazali G. Analysis of the Origin of Emiratis as Inferred from a Family Study Based on HLA-A, -C, -B, - DRB1, and -DQB1 Genes. Genes (Basel) 2023; 14:1159. [PMID: 37372339 DOI: 10.3390/genes14061159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023] Open
Abstract
In this study, we investigated HLA class I and class II allele and haplotype frequencies in Emiratis and compared them to those of Asian, Mediterranean, and Sub-Saharan African populations. METHODS Two-hundred unrelated Emirati parents of patients selected for bone marrow transplantation were genotyped for HLA class I (A, B, C) and class II (DRB1, DQB1) genes using reverse sequence specific oligonucleotide bead-based multiplexing. HLA haplotypes were assigned with certainty by segregation (pedigree) analysis, and haplotype frequencies were obtained by direct counting. HLA class I and class II frequencies in Emiratis were compared to data from other populations using standard genetic distances (SGD), Neighbor-Joining (NJ) phylogenetic dendrograms, and correspondence analysis. RESULTS The studied HLA loci were in Hardy-Weinberg Equilibrium. We identified 17 HLA-A, 28 HLA-B, 14 HLA-C, 13 HLA-DRB1, and 5 HLA-DQB1 alleles, of which HLA-A*02 (22.2%), -B*51 (19.5%), -C*07 (20.0%), -DRB1*03 (22.2%), and -DQB1*02 (32.8%) were the most frequent allele lineages. DRB1*03~DQB1*02 (21.2%), DRB1*16~DQB1*05 (17.3%), B*35~C*04 (11.7%), B*08~DRB1*03 (9.7%), A*02~B*51 (7.5%), and A*26~C*07~B*08~DRB1*03~DQB1*02 (4.2%) were the most frequent two- and five-locus HLA haplotypes. Correspondence analysis and dendrograms showed that Emiratis were clustered with the Arabian Peninsula populations (Saudis, Omanis and Kuwaitis), West Mediterranean populations (North Africans, Iberians) and Pakistanis, but were distant from East Mediterranean (Turks, Albanians, Greek), Levantine (Syrians, Palestinians, Lebanese), Iranian, Iraqi Kurdish, and Sub-Saharan populations. CONCLUSIONS Emiratis were closely related to Arabian Peninsula populations, West Mediterranean populations and Pakistanis. However, the contribution of East Mediterranean, Levantine Arab, Iranian, and Sub-Saharan populations to the Emiratis' gene pool appears to be minor.
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Affiliation(s)
- Zain Al Yafei
- Sheikh Khalifa Medical City-Union71-Purehealth, Abu Dhabi P.O. Box 51900, United Arab Emirates
- United Arab Emirates University, Al Ain P.O. Box 51900, United Arab Emirates
| | - Abdelhafidh Hajjej
- Department of Immunogenetics, National Blood Transfusion Center, Tunis P.O. Box 1006, Tunisia
| | - Marion Alvares
- Sheikh Khalifa Medical City-Union71-Purehealth, Abu Dhabi P.O. Box 51900, United Arab Emirates
- United Arab Emirates University, Al Ain P.O. Box 51900, United Arab Emirates
| | - Ayeda Al Mahri
- Sheikh Khalifa Medical City-Union71-Purehealth, Abu Dhabi P.O. Box 51900, United Arab Emirates
- United Arab Emirates University, Al Ain P.O. Box 51900, United Arab Emirates
| | - Amre Nasr
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh P.O. Box 22490, Saudi Arabia
| | - Rajaa Mirghani
- Higher College of Technology, Abu Dhabi P.O. Box 25026, United Arab Emirates
| | - Ali Al Obaidli
- SEHA Kidney Care, SEHA, Abu Dhabi P.O. Box 92900, United Arab Emirates
| | - Mohamed Al Seiari
- SEHA Kidney Care, SEHA, Abu Dhabi P.O. Box 92900, United Arab Emirates
| | - Steven J Mack
- Department of Pediatrics, University of California, San Francisco, Oakland, CA 94609, USA
| | | | - Hisham A Edinur
- School of Health Sciences, Universiti Sains Malaysia, Health Campus, Kubang Kerian 16150, Kelantan, Malaysia
| | - Wassim Y Almawi
- Faculty of Sciences, El-Manar University, Tunis P.O. Box 94, Tunisia
| | - Gehad ElGhazali
- Sheikh Khalifa Medical City-Union71-Purehealth, Abu Dhabi P.O. Box 51900, United Arab Emirates
- United Arab Emirates University, Al Ain P.O. Box 51900, United Arab Emirates
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2
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Alvares M, Anwar S, Hashmi SK, Zaman MB, Al Mahri A, Alvares C, Al Katheeri L, Purushothaman A, Ralonya ME, Sangalang MG, Jannang R, Abdulle A, Al Qubaisi A, Al Ahmed M, Khamis AH, Al Seiari M, Al Obaidli A, Al Yafei Z, ElGhazali G. Development of a calculated panel reactive antibody calculator for the United Arab Emirates: a proof of concept study. Sci Rep 2023; 13:8468. [PMID: 37231090 DOI: 10.1038/s41598-023-34860-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 05/09/2023] [Indexed: 05/27/2023] Open
Abstract
Calculated panel reactive antibody (CPRA) is used to help increase sensitized patient's access to transplantation. United Arab Emirates (UAE) has a diverse resident population hence we developed a UAE-CPRA calculator based on HLA antigen frequencies of the different ethnic groups that represent the UAE population. HLA antigen frequencies at serological split antigen level for HLA-A, -B, -C, -DRB1 and -DQB1 of 1002 healthy unrelated donors were performed. We subsequently compared the performance of the UAE CPRA calculator with the Organ Procurement and Transplantation Network (OPTN) and the Canadian CPRA calculators in 110 Kidney Transplant waitlist patients from January 2016 to December 2018. Lin's concordance correlation coefficient showed a moderate agreement between the UAE and OPTN calculator (Rc = 0.949, 95% CI 0.929-0.963) and the UAE and Canadian calculators (Rc = 0.952, 95% CI 0.932-0.965). While there continued to be a moderate agreement (Rc = 0.937, UAE versus OPTN calculator) in the lower sensitized group, a poor agreement (Rc = 0.555, UAE versus OPTN calculator) was observed in the higher sensitized group. In this study, we provide a template for countries to develop their own population-specific CPRA calculator. Implementation of the CPRA algorithm based on HLA frequencies of the multi-ethnic UAE population will be more fitting to increase access to transplantation and improve transplant outcomes. Our study demonstrates that the CPRA calculators developed using the data from the western population had poor correlation in our higher sensitized patients disadvantaging them in potential organ allocations systems. We plan to further refine this calculator by using high resolution HLA typing to address the problem of a genetically diverse population.
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Affiliation(s)
- Marion Alvares
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Siddiq Anwar
- Department of Medicine, Sheikh Shakbout Medical City, Abu Dhabi, United Arab Emirates
| | - Shahrukh K Hashmi
- Department of Medicine, Sheikh Shakbout Medical City, Abu Dhabi, United Arab Emirates
- Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA
- Clinical Affairs, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Muhammad Badar Zaman
- Renal Transplant Department, Sheikh Khalifa Medical City, Abu Dhabi, United Arab Emirates
| | - Ayeda Al Mahri
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | | | - Layla Al Katheeri
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | | | - Mesele Emily Ralonya
- Renal Transplant Department, Sheikh Khalifa Medical City, Abu Dhabi, United Arab Emirates
| | - Marie Glo Sangalang
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Raysha Jannang
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Abdulkadir Abdulle
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Alyazia Al Qubaisi
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Maitha Al Ahmed
- Renal Transplant Department, Sheikh Khalifa Medical City, Abu Dhabi, United Arab Emirates
| | - Amar Hassan Khamis
- Mohamed Bin Rashed University of Medicine and Medical Sciences, Dubai, United Arab Emirates
| | - Mohamed Al Seiari
- Renal Transplant Department, Sheikh Khalifa Medical City, Abu Dhabi, United Arab Emirates
| | | | - Zain Al Yafei
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Gehad ElGhazali
- Transplant Immunology section, Sheikh Khalifa Medical City, Union71 - Purehealth, Abu Dhabi and College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates.
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Kulski JK, AlSafar HS, Mawart A, Henschel A, Tay GK. HLA class I allele lineages and haplotype frequencies in Arabs of the United Arab Emirates. Int J Immunogenet 2019; 46:152-159. [PMID: 30892829 DOI: 10.1111/iji.12418] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 11/29/2018] [Accepted: 01/03/2019] [Indexed: 12/18/2022]
Abstract
The high degree of polymorphism of the HLA system provides suitable genetic markers to study the diversity and migration of different world populations and is beneficial for forensic identification, anthropology, transplantation and disease associations. Although the United Arab Emirates (UAE) population of about nine million people is heterogeneous, information is limited for the HLA class I allele and haplotype frequencies of the Bedouin ethnic group. We performed low-resolution PCR-SSP genotyping of three HLA class I loci at HLA-A, -B and -C for 95 unrelated healthy Bedouins from the cities of Al Ain and Abu Dhabi in the UAE. A total of 54 HLA allele lineages were detected; the most frequent low-resolution allele lineages at each HLA locus were A*02 (0.268), B*51 (0.163) and C*07 (0.216). The inferred estimates for the two most frequent HLA-A and HLA-B haplotypes were HLA-A*02 ~ HLA-B*50 (0.070) and HLA-A*02 ~ HLA-B*51 (0.051), and the most frequent 3-locus haplotype was HLA-A*02 ~ HLA-B*50 ~ HLA-C*06 (0.068). The HLA allele lineage frequencies of the UAE Arabs were compared to those previously reported for 70 other world populations, and a strong genetic similarity was detected between the UAE Arabs and the Saudi Arabians from the west with evidence of a limited gene flow between the UAE Arabs and Pakistani across the Gulf from the east, and the UAE Arabs and Omani from the south of the Gulf Peninsula.
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Affiliation(s)
- Jerzy K Kulski
- School of Psychiatry and Clinical Neurosciences, The University of Western Australia, Crawley, Western Australia, Australia
| | - Habiba S AlSafar
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.,Department of Biomedical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Aurelie Mawart
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Andreas Henschel
- Department of Electrical Engineering and Computer Science, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Guan K Tay
- School of Psychiatry and Clinical Neurosciences, The University of Western Australia, Crawley, Western Australia, Australia.,Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.,Department of Biomedical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
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Kone A, Diarra B, Cohen K, Diabate S, Kone B, Diakite MT, Diarra H, Sanogo M, Togo ACG, Sarro YDS, Baya B, Coulibaly N, Kodio O, Achenbach CJ, Murphy RL, Holl JL, Siddiqui S, Doumbia S, Bishai WR, Diallo S, Maiga M. Differential HLA allele frequency in Mycobacterium africanum vs Mycobacterium tuberculosis in Mali. HLA 2019; 93:24-31. [PMID: 30516034 DOI: 10.1111/tan.13448] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 10/22/2018] [Accepted: 11/28/2018] [Indexed: 11/28/2022]
Abstract
Tuberculosis (TB) is caused by Mycobacterium tuberculosis complex (MTBC), however, the distribution and frequency of MTBC lineages and sublineages vary in different parts of the globe. Mycobacterium africanum, a member of MTBC is responsible for a large percentage of TB cases in West Africa, however, it is rarely identified outside of this part of the World. Whether or not differential HLA polymorphism (an important host factor) is contributing to the geographic restriction of M. africanum to West Africa is unknown. Here, we conducted a cohort study in Mali of newly diagnosed individuals with active pulmonary TB and normal healthy controls. The MTBC isolates were spoligotyped to determine the TB study groups (M. tuberculosis sensu stricto LAM10 and M. africanum), and HLA typing was performed on peripheral blood. Unlike previous reports on other populations, we found that HLA class-I alleles were significantly associated with active TB disease in this population. HLA-B alleles (B*07:02, B*08:01, B*14:02, B*15:03, B*15:10, B*18:01, B*42:01, B*42:02, B*51:01 and B*81:01) were significantly associated with M. africanum (40%-45%) and M. tuberculosis (75%) compared with healthy controls. Many HLA-A alleles (A*02:05, A*34:02, A*66:01 and A*68:02) were also associated with both TB groups (65%-70%). However, many class II HLA-DR variants were found to be associated with M. tuberculosis but not M. africanum with the exception of the DRB1*03:01, which was associated with both groups. The differential HLA distribution observed in this study might be at least partially responsible for the geographical restriction of M. africanum infections to West Africa.
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Affiliation(s)
- Amadou Kone
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Bassirou Diarra
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Keira Cohen
- Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Seydou Diabate
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Bourahima Kone
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Mahamane T Diakite
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Hawa Diarra
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Moumine Sanogo
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Antieme C G Togo
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Yeya Dit Sadio Sarro
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Bocar Baya
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Nadie Coulibaly
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Ousmane Kodio
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | | | | | | | - Sophia Siddiqui
- National Institute of Allergic and Infectious Diseases, Rockville, Maryland
| | - Seydou Doumbia
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - William R Bishai
- Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Souleymane Diallo
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali
| | - Mamoudou Maiga
- University of Sciences, Techniques and Technologies of Bamako (USTTB), Bamako, Mali.,Northwestern University, Chicago, Illinois
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5
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Ikhtiar AM, Jazairi B, Khansa I, Othman A. HLA class I alleles frequencies in the Syrian population. BMC Res Notes 2018; 11:324. [PMID: 29784010 PMCID: PMC5963146 DOI: 10.1186/s13104-018-3427-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 05/10/2018] [Indexed: 11/27/2022] Open
Abstract
Objective The HLA system is known to be the most polymorphic genetic loci in humans. Distribution and frequencies of HLA alleles are highly variable among different human ethnic groups. The HLA system has an important role in disease susceptibility and resistance, especially in autoimmune diseases and cancer. This study is the first report about HLA genetic variability and haplotypes among Syrians. Frequency of the HLA class I (A, B and C) alleles was determined in 105 healthy unrelated Syrian individuals from different regions in Syria. We also studied the associated haplotypes frequencies. Alleles frequencies were compared with those reported for other populations. Results Fifty-eight HLA class I alleles were observed in Syrians including 15 for HLA-A, 28 for HLA-B and 15 for HLA-C. We observed 37 HLA-A/C haplotypes, 32 B/C, and 31 A/B haplotypes. The most frequent haplotypes were A*01/C*04, A*02/C*07, A*02/B*35, and B*35/C*04. In conclusions, our preliminary study suggests a high variability in HLA class I alleles in the Syrian population. This study also gives a general reference database about the genetic pool distribution of HLA class I alleles among Syrians and can be consulted for HLA related diseases.
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Affiliation(s)
- Adnan M Ikhtiar
- FCM Lab., Molecular Biology & Biotechnology Department, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syrian Arab Republic.
| | - Batoul Jazairi
- FCM Lab., Molecular Biology & Biotechnology Department, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syrian Arab Republic
| | - Issam Khansa
- FCM Lab., Molecular Biology & Biotechnology Department, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syrian Arab Republic
| | - Ahmad Othman
- FCM Lab., Molecular Biology & Biotechnology Department, Atomic Energy Commission of Syria (AECS), P.O. Box 6091, Damascus, Syrian Arab Republic.,Department of Anatomy, Histology and Embryology, Medicine College, Damascus University, Damascus, Syria
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Ravazzi-Gauch C, Bajay MM, Caldas HC, Abbud-Filho M. HLA-A, -B, and -DRB1 allele and haplotype diversity in a cohort of Brazilian renal transplant candidates. Hum Immunol 2016; 77:464-9. [PMID: 27108963 DOI: 10.1016/j.humimm.2016.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 04/20/2016] [Accepted: 04/20/2016] [Indexed: 01/18/2023]
Abstract
The distribution of organs for renal transplant depends on HLA matching between donor and recipient. This study aimed to characterize the allele and haplotype frequencies of HLA-A, -B, and -DRB1 in a cohort of renal transplant candidates populations in the region of Sao José do Rio Preto (State of São Paulo), to compare the allele frequencies between Caucasian and Black in that region, as well as to compare these frequencies with different Brazilian populations reported. The HLA-A, -B, and -DRB1 allele and haplotypes frequencies were analyzed in a sample of 2.624 individuals and classified according to the ethnic group (2.347 Caucasians and 277 Blacks). The HLA class I (A, B) and class II (DRB1) specificities were determined by complement-dependent microlymphocytotoxic (CDC) and Polymerase Chain Reaction/Sequence Specific Priming (PCR-SSP) methods, respectively. Twenty-one HLA-A, 34 HLA-B and 13 HLA-DRB1 allelic groups were identified. The most frequent alleles for each locus were HLA-A(∗)02, HLA-B(∗)35, and HLA-DRB1(∗)11. The most frequent haplotypes found were A(∗)01 B(∗)08 DRB1(∗)03 among Caucasians and A(∗)29 B(∗)15 DRB1(∗)04 among Blacks. The most common alleles for each locus among RTx were HLA-A(∗)02, HLA-B(∗)35 and HLA-DRB1(∗)11. The haplotypes A(∗)01 B(∗)08 DRB1(∗)03 and A(∗)29 B(∗)44 DRB1(∗)07 prevailed among Caucasians and Blacks, respectively. This study provides the first data on the HLA-A, HLA-B and HLA-DRB1 allele and haplotype frequencies of renal transplant candidates populations in the region of Sao José do Rio Preto.
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Affiliation(s)
- Camila Ravazzi-Gauch
- Laboratory of Immunology and Experimental Transplantation-LITEX, Medical School of São José do Rio Preto - FAMERP, SP, Brazil; Laboratory of Immunology of Transplantation, Institute of Urology and Nephrology, São José do Rio Preto, SP, Brazil
| | | | - Heloisa Cristina Caldas
- Laboratory of Immunology and Experimental Transplantation-LITEX, Medical School of São José do Rio Preto - FAMERP, SP, Brazil
| | - Mario Abbud-Filho
- Laboratory of Immunology and Experimental Transplantation-LITEX, Medical School of São José do Rio Preto - FAMERP, SP, Brazil; Laboratory of Immunology of Transplantation, Institute of Urology and Nephrology, São José do Rio Preto, SP, Brazil.
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Nassar MY, Al-Shamahy HA, Masood HAA. The Association between Human Leukocyte Antigens and Hypertensive End-Stage Renal Failure among Yemeni Patients. Sultan Qaboos Univ Med J 2015; 15:e241-e249. [PMID: 26052458 PMCID: PMC4450788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 08/18/2014] [Accepted: 10/19/2014] [Indexed: 06/04/2023] Open
Abstract
OBJECTIVES Many studies have attempted to locate a connection between various genetic factors and the pathogenesis of certain diseases. A number of these have found human leukocyte antigens (HLAs) to be the most significant genetic factors affecting the susceptibility of an individual to a certain disease. The present case-control study aimed to determine the connection between class I and class II HLAs and cases of hypertensive end-stage renal failure (HESRF), as contrasted with healthy controls, in Yemen. METHODS The study was carried out between March 2013 and March 2014 and included 50 HESRF patients attending the Urology & Nephrology Center at Al-Thawra University Hospital in Sana'a, Yemen, and 50 healthy controls visiting the same centre for kidney donation. Among both patients and controls, HLA class I (A, B and C) and class II (DRB1) genotypes were determined by polymerase chain reactions. RESULTS There was an association (odds ratio: 4.0) with HLA-A9(24) and HESRF, although this was not statistically significant. A significant protective function was found for the HLA-CW3 and DRB1-8 genes against the development of HESRF. Although HLA-B14 was present in some patients (0.06) and not in the controls, this difference was not statistically significant enough to conclude that HLA-B14 plays a role in the genetic predisposition for end-stage renal disease development. There was a high frequency of HLA-A2, B5, CW6, DRB1-3, DRB1-4 and DRB1-13 in both patients and controls. CONCLUSION Although no HLAs were found to play a highly significant role in genetic predisposition to HESRF, certain HLA genes could be considered as protective genes against HESRF development.
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Affiliation(s)
- Mogahid Y. Nassar
- Department of Clinical Pathology & Immunology, Faculty of Medical Sciences, University of Sciences & Technology, Sana’a, Yemen
| | - Hassan A. Al-Shamahy
- Department of Medical Microbiology & Clinical Immunology, Faculty of Medicine & Health Sciences, Sana’a University, Sana’a, Yemen
| | - Haitham A. A. Masood
- Department of Clinical Immunology, Al-Thorah University Hospital, Sana’a, Yemen
- Yemen Ministry of Public Health, Sana’a, Yemen
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Hajeer AH, Al Balwi MA, Aytül Uyar F, Alhaidan Y, Alabdulrahman A, Al Abdulkareem I, Al Jumah M. HLA-A, -B, -C, -DRB1 and -DQB1 allele and haplotype frequencies in Saudis using next generation sequencing technique. ACTA ACUST UNITED AC 2014; 82:252-8. [PMID: 24461004 DOI: 10.1111/tan.12200] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Revised: 08/01/2013] [Accepted: 08/24/2013] [Indexed: 11/30/2022]
Abstract
Next generation sequencing (NGS) is a promising technique that can reveal the entire gene sequences and to the highest possible resolution without any phase ambiguities. We have used this technique to investigate the frequencies of HLA-A, -B, -C, -DRB1 and -DQB1 in a Saudi cohort of healthy individuals. We used NGS using the 454 genome sequence (GS) FLX System and Conexio assign atf 454 software to human leukocyte antigen (HLA) genotype eight class I and class II loci. A total of 158 healthy Saudi adults were analyzed. The most frequently observed allele for HLA-A was HLA-A*02:01:01:01 (13.6%); for HLA-B, HLA-B*50:01:01 (15.8%); for HLA-C, HLA-C*06:02:01:01 (18.7%); for HLA-DRB1, HLA-DRB1*07:01:01:01 (26.6%); and for HLA-DQB1, HLA-DQB1*02:01:01 (20.3%). The most common four loci haplotypes in the Saudi population were HLA-A*24:02:01:01-B*08:01:01-C*07:02:01:01-DRB1*03:01:01:01 and HLA-A*23:01:01-B*50:01:01-C*06:02:01:01-DRB1*07:01:01:01.. We have used a highly informative technique for HLA typing of a Saudi healthy cohort to establish allele and haplotype frequencies. These results should prove useful for population studies, disease associations and future planning of the unrelated bone marrow donor registry.
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Affiliation(s)
- A H Hajeer
- Department of Pathology & Laboratory Medicine, King Abdulaziz Medical City, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia; College of Medicine, King Saud bin Abdulaziz University for Health Sciences, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia
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Devasundaram S, Deenadayalan A, Raja A. In silicoanalysis of potential human T Cell antigens fromMycobacterium tuberculosisfor the development of subunit vaccines against tuberculosis. Immunol Invest 2014; 43:137-59. [DOI: 10.3109/08820139.2013.857353] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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10
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Jawdat D, Al-Hamad B, Al-Jumah M, Hajeer A. HLA-B50 polymorphism in the Saudi population. Int J Immunogenet 2013; 41:95-7. [PMID: 24256064 DOI: 10.1111/iji.12096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 09/05/2013] [Accepted: 09/22/2013] [Indexed: 11/27/2022]
Abstract
The HLA-B50 serologic family is very frequent in people of Arabic origin. In Saudi Arabia, HLA-B50 is the most frequent HLA-B allele. The aim of this study was to investigate the distribution of HLA-B50 alleles in healthy Saudi individuals. A total of 162 healthy Saudi individuals were selected based on low-resolution HLA typing. DNA samples were typed by sequence-based typing method for exons 2, 3 and 4 of the HLA-B locus (Genome Diagnostics B.V.). The HLA-B*50 alleles were analysed using SBT engine software. HLA-B*50:01:01 was found in 161 of 162 individuals (99.4%), while HLA-B*50:09 was found in one individual (0.6%). HLA-B*50:01:01 is the most common HLA-B50 allele in Saudi Arabia.
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Affiliation(s)
- D Jawdat
- King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia; College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
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United Arab Emirates: phylogenetic relationships and ancestral populations. Gene 2013; 533:411-9. [PMID: 24120897 DOI: 10.1016/j.gene.2013.09.092] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 09/22/2013] [Accepted: 09/25/2013] [Indexed: 11/23/2022]
Abstract
In the current report, 109 unrelated individuals from the United Arab Emirates (UAE) were typed across 15 autosomal short tandem repeat (STR) loci (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D149S433, vWA, TPOX, D18S51, D5S818 and FGA) routinely employed in population genetics analyses and compared across a set of ethnically and geographically targeted reference collections. UAE, located at the southeastern most portion of the Arabian Peninsula, in the tri-continental crossroads connecting Africa, Europe and Asia, has been influenced by a number of human dispersal waves from a plethora of sources including the Paleolithic "Out of Africa" migrations, the exodus of Neolithic pastoral agriculturalists from the Fertile Crescent and Northern Africa, as well as more recent migrations from Asia and the Middle East. We found that despite the high levels of consanguinity that characterize UAE, this population is genetically highly heterogeneous. When compared to various world-wide biogeographical regions, the Arabian Peninsula exhibits the highest intra-population variance. Admixture analyses indicate that UAE and Bahrain uniquely in Arabia share 23.7% and 22.9%, respectively, of their DNA with Southwest Asian populations. Similar and complex Structure profiles are seen among Arabian Peninsula populations underscoring the high genetic diversity of the region. Although UAE shares a number of genetic characteristics in common with the rest of the populations in the Arabian Peninsula, it is unique in terms of its relative high Asian genetic component, likely the result of geographical proximity to Southwest Asia, west-bound waves of migration and socio-political ties with territories to the east.
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Shaykholeslam Esfahani M, Vallian S. Characterization and specification of microsatellite markers in the HLA-DRB1 gene region: A revision to major histocompatibility complex database. Hum Immunol 2013; 74:965-9. [DOI: 10.1016/j.humimm.2013.04.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 02/27/2013] [Accepted: 04/10/2013] [Indexed: 10/26/2022]
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Khansa S, Hoteit R, Shammaa D, Khalek RA, El Halas H, Greige L, Abbas F, Mahfouz RA. HLA Class I allele frequencies in the Lebanese population. Gene 2013; 512:560-5. [DOI: 10.1016/j.gene.2012.09.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 08/07/2012] [Accepted: 09/12/2012] [Indexed: 11/26/2022]
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Einollahi B, Rostami Z, Teimoori M. Human leukocyte antigen variation among Iranian renal transplant recipients. J Nephropathol 2012; 1:164-9. [PMID: 24475410 DOI: 10.5812/nephropathol.8114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 05/27/2012] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND HLA typing analysis is important in renal transplant patients. OBJECTIVES We made a plan to determine the most frequent HLA antigens in Iranian kidney transplant patients. PATIENTS AND METHODS In a retrospective cross sectional study, HLA patterns were defined in 512 kidney transplant recipients (67% male and 33% female) from different transplant centers of Tehran, Iran between 2008 and 2011 by microcytotoxicity assay. RESULTS The studies samples were of different ethnic groups of the Iranian kidney transplants. Considerable variations were observed in each HLA sub class. A2, A1, A3, A24 and A26 were the most frequent HLA-A antigens. Among HLA-B, the predominant antigens were B35; B13, B15, B13 and B18. The most frequent HLA-DR antigens were DR 4, DR11, DR1, DR3 and DR15. DQ1 showed the highest frequency and followed by DQ3 and DQ2. CONCLUSIONS These results showed considerable heterogeneity in both HLA class I and class II antigens, which reflects recent admixture of this group with neighboring Middle East populations.
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Affiliation(s)
- Behzad Einollahi
- Nephrology and Urology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Zohreh Rostami
- Nephrology and Urology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mojtaba Teimoori
- Nephrology and Urology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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MUSTAFA KHADERN, HAMMOUDEH MOHAMMED, KHAN MUHAMMADASIM. HLA-B27 Prevalence in Arab Populations and Among Patients with Ankylosing Spondylitis: Table 1. J Rheumatol 2012; 39:1675-7. [DOI: 10.3899/jrheum.120403] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Objective.To investigate prevalence of HLA-B27 among general Arab populations and among patients with ankylosing spondylitis (AS), and to review published data.Methods.The prevalence of HLA-B27 was studied among 2579 unrelated healthy Jordanians, almost equally divided among Palestinian refugees and natives of Jordan, reflecting the general population of Jordan. The prevalence of HLA-B27 was also studied among 129 patients with AS, 70 from Jordan, and the remaining 59 from Qatar. HLA typing was performed by standard 2-stage micro-lymphocytotoxicity method. We also reviewed published English language studies of HLA-B27 in Arab patients with AS and general populations retrieved through Medline and cross-reference search.Results.We observed that the general prevalence of HLA-B27 among Jordanians is 2.4%; while the reported prevalence ranges between 2% and 5% among major Arab populations. The prevalence of HLA-B27 among patients with AS is 71% in Jordan and 73% in Qatar, while the reported prevalence from pooled published data from various Arab populations is 64%.Conclusion.From these data one can conclude that HLA-B27 is present in about 2% to 5% among major Arab populations and that its prevalence in Arab patients with AS is closer to 70%.
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de Menthon M, Lavalley MP, Maldini C, Guillevin L, Mahr A. HLA-B51/B5 and the risk of Behçet's disease: a systematic review and meta-analysis of case-control genetic association studies. ACTA ACUST UNITED AC 2009; 61:1287-96. [PMID: 19790126 DOI: 10.1002/art.24642] [Citation(s) in RCA: 291] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVE To quantify by meta-analysis the genetic effect of the HLA-B5 or HLA-B51 (HLA-B51/B5) allele on the risk of developing Behçet's disease (BD) and to look for potential effect modifiers. METHODS Relevant studies were identified using the PubMed Medline database and manual searches of the literature. Pooled odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated by using the random-effects model. Subgroup meta-analyses and meta-regression analyses were undertaken to investigate the effects of selected study-level parameters on the pooled OR. Heterogeneity was assessed using the I2 statistic. Pooled results were used to calculate population-attributable risks (PAR) for BD in relationship to HLA-B51/B5. RESULTS A total of 4,800 patients with BD and 16,289 controls from 78 independent studies (published 1975-2007) were selected. The pooled OR of HLA-B51/B5 allele carriers to develop BD compared with noncarriers was 5.78 (95% CI 5.00-6.67), with moderate between-study heterogeneity (I2 = 61%). The subgroup analyses stratifying studies by geographic locations (Eastern Asia, Middle East/North Africa, Southern Europe, Northern/Eastern Europe) yielded consistent OR ranges (5.31-7.20), with I2 ranges of 52-70%. Univariate random-effects meta-regression indicated the percentage of male BD cases (P = 0.008) as a source of heterogeneity. The PAR within the various geographic areas were estimated at 32-52%. CONCLUSION The strength of the association between BD and HLA-B51/B5, and its consistency across populations of various ethnicities, lends further support to this allele being a primary and causal risk determinant for BD. Variations according to sex support an interaction of this allele with BD characteristics.
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Affiliation(s)
- Mathilde de Menthon
- Hôpital Cochin; Université Paris-René Descartes, Assistance Publique Hôpitaux de Paris, Paris, France
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Al Attia HM, Santhosh A. A probe into the HLA-DR and DQ of Arab patients with primary antiphospholipid (Hughes) syndrome. Rheumatol Int 2007; 28:193-5. [PMID: 17609949 DOI: 10.1007/s00296-007-0387-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Accepted: 05/19/2007] [Indexed: 10/23/2022]
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Vijaya Lakshmi V, Rakh SS, Anu Radha B, Hari Sai Priya V, Pantula V, Jasti S, Suman Latha G, Murthy KJR. Role of HLA-B51 and HLA-B52 in susceptibility to pulmonary tuberculosis. INFECTION GENETICS AND EVOLUTION 2006; 6:436-9. [PMID: 16563877 DOI: 10.1016/j.meegid.2006.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2005] [Revised: 12/21/2005] [Accepted: 02/12/2006] [Indexed: 11/23/2022]
Abstract
MHC class I-restricted CD8+ T cells are important for the generation of protective immune responses in MTB infection. CD8+ CTL (cytotoxic T-lymphocyte)-derived IFN-g may be especially important both for cells lacking MHC class II molecules, e.g. in the lung and for macrophages where mycobacteria can evade recognition during chronic infection by sequestering their antigens away from sensitized CD4+ T cells. This study was designed to detect any association of MHC class I (HLA-B) molecules with pulmonary tuberculosis. A total of 75 individuals, comprising of 33 patients with pulmonary tuberculosis; 12 HIV patients who developed tuberculosis and 30 healthy controls, were included in the study. They were typed for HLA-B by the PCR-SSP method. The results of only HLA-B alleles, which are highly significant, are presented here. The number of healthy individuals with HLA-B52 was significantly high when compared to the patient groups (healthy versus TB: 21.2% versus 0.0%, OR=0.0, P<0.0001, P(c)=0.003; healthy versus HIV-TB: 21.2% versus 16.7%; OR=0.74; P<0.001; P(c)=0.003). In contrast, the number of patients, both TB- and HIV-TB-positive, with HLA-B51 was significantly high when compared to the healthy group of individuals (TB versus healthy: 36.7% versus 3%; OR=18.53; P<0.0001; P(c)=0.001; HIV-TB versus healthy: 41.7% versus 3%; OR=22.86; P<0.0001; P(c)=0.001). Only one healthy control was positive to HLA-B51; however this individual also had HLA-B52. The results of this study suggest that HLA-B52(5) has a negative, i.e. a protective association and HLA-B51(5) has a positive (susceptible) association, for pulmonary tuberculosis. Studies on HLA-B51 and HLA-B52 in a larger population to assess their role in tuberculosis may be useful for TB-vaccination strategies, since HLA profiles are likely to be related to vaccine efficacy.
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Affiliation(s)
- V Vijaya Lakshmi
- Global Hospitals, Road No. 1, Banjara Hills, Hyderabad 500034, India.
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Al Attia HM, Santosh A, Zalzala M. Is There Predilection for Nonnodular Rheumatoid Arthritis in Arabs With HLA-DR 1? J Clin Rheumatol 2005; 11:342-4. [PMID: 16371811 DOI: 10.1097/01.rhu.0000191151.57188.a4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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