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Karaatmaca B, Cagdas D, Esenboga S, Erman B, Tan C, Turul Ozgur T, Boztug K, van der Burg M, Sanal O, Tezcan I. Heterogeneity in RAG1 and RAG2 deficiency: 35 cases from a single-centre. Clin Exp Immunol 2024; 215:160-176. [PMID: 37724703 PMCID: PMC10847812 DOI: 10.1093/cei/uxad110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 09/03/2023] [Accepted: 09/17/2023] [Indexed: 09/21/2023] Open
Abstract
Recombination activating genes (RAG)1 and RAG2 deficiency leads to combined T/B-cell deficiency with varying clinical presentations. This study aimed to define the clinical/laboratory spectrum of RAG1 and RAG2 deficiency. We retrospectively reviewed the clinical/laboratory data of 35 patients, grouped them as severe combined immunodeficiency (SCID), Omenn syndrome (OS), and delayed-onset combined immunodeficiency (CID) and reported nine novel mutations. The male/female ratio was 23/12. Median age of clinical manifestations was 1 months (mo) (0.5-2), 2 mo (1.25-5), and 14 mo (3.63-27), age at diagnosis was 4 mo (3-6), 4.5 mo (2.5-9.75), and 27 mo (14.5-70) in SCID (n = 25; 71.4%), OS (n = 5; 14.3%), and CID (n = 5; 14.3%) patients, respectively. Common clinical manifestations were recurrent sinopulmonary infections 82.9%, oral moniliasis 62.9%, diarrhea 51.4%, and eczema/dermatitis 42.9%. Autoimmune features were present in 31.4% of the patients; 80% were in CID patients. Lymphopenia was present in 92% of SCID, 80% of OS, and 80% of CID patients. All SCID and CID patients had low T (CD3, CD4, and CD8), low B, and increased NK cell numbers. Twenty-eight patients underwent hematopoietic stem cell transplantation (HSCT), whereas seven patients died before HSCT. Median age at HSCT was 7 mo (4-13.5). Survival differed in groups; maximum in SCID patients who had an HLA-matched family donor, minimum in OS. Totally 19 (54.3%) patients survived. Early molecular genetic studies will give both individualized therapy options, and a survival advantage because of timely diagnosis and treatment. Further improvement in therapeutic outcomes will be possible if clinicians gain time for HSCT.
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Affiliation(s)
- Betul Karaatmaca
- Hacettepe University School of Medicine, Department of Pediatrics, Division of Pediatric Immunology, Ankara, Turkey
- Department of Pediatric Allergy and Immunology, University of Health Sciences, Ankara Bilkent City Hospital, Ankara, Turkey
| | - Deniz Cagdas
- Hacettepe University School of Medicine, Department of Pediatrics, Division of Pediatric Immunology, Ankara, Turkey
- Section of Pediatric Immunology, Institute of Child Health, Hacettepe University, Ankara, Turkey
| | - Saliha Esenboga
- Hacettepe University School of Medicine, Department of Pediatrics, Division of Pediatric Immunology, Ankara, Turkey
| | - Baran Erman
- Section of Pediatric Immunology, Institute of Child Health, Hacettepe University, Ankara, Turkey
| | - Cagman Tan
- Section of Pediatric Immunology, Institute of Child Health, Hacettepe University, Ankara, Turkey
| | - Tuba Turul Ozgur
- Hacettepe University School of Medicine, Department of Pediatrics, Division of Pediatric Immunology, Ankara, Turkey
| | - Kaan Boztug
- St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Medical University of Vienna, Department of Pediatrics and Adolescent Medicine, Vienna, Austria
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, Austria
- St. Anna Children's Hospital, Vienna, Austria
| | - Mirjam van der Burg
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Ozden Sanal
- Hacettepe University School of Medicine, Department of Pediatrics, Division of Pediatric Immunology, Ankara, Turkey
| | - Ilhan Tezcan
- Hacettepe University School of Medicine, Department of Pediatrics, Division of Pediatric Immunology, Ankara, Turkey
- Section of Pediatric Immunology, Institute of Child Health, Hacettepe University, Ankara, Turkey
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Lev A, Somech R, Somekh I. Newborn screening for severe combined immunodeficiency and inborn errors of immunity. Curr Opin Pediatr 2023; 35:692-702. [PMID: 37707504 DOI: 10.1097/mop.0000000000001291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
PURPOSE OF REVIEW Severe combined immune deficiency (SCID) is the most devastating genetic disease of the immune system with an unfavorable outcome unless diagnosed early in life. Newborn screening (NBS) programs play a crucial role in facilitating early diagnoses and timely interventions for affected infants. RECENT FINDINGS SCID marked the pioneering inborn error of immunity (IEI) to undergo NBS, a milestone achieved 15 years ago through the enumeration of T-cell receptor excision circles (TRECs) extracted from Guthrie cards. This breakthrough has revolutionized our approach to SCID, enabling not only presymptomatic identification and prompt treatments (including hematopoietic stem cell transplantation), but also enhancing our comprehension of the global epidemiology of SCID. SUMMARY NBS is continuing to evolve with the advent of novel diagnostic technologies and treatments. Following the successful implementation of SCID-NBS programs, a call for the early identification of additional IEIs is the next step, encompassing a broader spectrum of IEIs, facilitating early diagnoses, and preventing morbidity and mortality.
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Affiliation(s)
- Atar Lev
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center; Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Affiliated to the Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
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Yakıcı N, Oskay Halaçlı S, Tan Ç, Gür Çetinkaya P, Akar HT, Çavdarlı B, Özbek B, Çağdaş D, Tezcan İ. A Novel Interleukin 17 Receptor A Mutation in a Child with Chronic Mucocutaneous Candidiasis and Staphylococcal Skin Infections. Turk Arch Pediatr 2023; 58:442-447. [PMID: 37317577 PMCID: PMC10441147 DOI: 10.5152/turkarchpediatr.2023.22311] [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: 12/18/2022] [Accepted: 03/16/2023] [Indexed: 06/16/2023]
Abstract
OBJECTIVE Chronic mucocutaneous candidiasis leads to persistent or recurrent fungal infections of the nail, skin, oral, and genital mucosa. Impaired interleukin 17-mediated immunity is a cause of chronic mucocutaneous candidiasis. We aimed to show the pathogenicity of a novel interleukin 17 receptor A mutation through functional studies. MATERIALS AND METHODS After next-generation sequencing analysis showed the interleukin 17 receptor A variant, we confirmed the variant by Sanger sequencing and functional validation of the variant by flow cytometry. RESULTS We present the case of a 6-year-old male patient who presented with recurrent oral and genital Candida infections and eczema. He had staphylococcal skin lesions, fungal susceptibility, and eczema. The patient carried a novel homozygous nonsense [(c.787C> T) (p.Arg263Ter)] mutation in the interleukin 17 receptor A gene. Sanger sequencing confirmed the variant and revealed the segregation of the variant in the family. We used flow cytometry to detect interleukin 17 receptor A protein expression in peripheral blood mononuclear cells from patients and measured Th17 cell percentage. We observed low interleukin 17 receptor A protein expression in patient peripheral blood mononuclear cells, decreased CD4+ interleukin 17+ cell percentage, and decreased interleukin 17F expression in CD4+ cells compared to healthy controls. CONCLUSIONS Innate immune defects may lead to chronic recurrent fungal and bacterial infections of the skin, mucosa, and nails. Generally, genetic and functional analysis is needed in addition to basic immunological tests.
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Affiliation(s)
- Nalan Yakıcı
- Department of Pediatric Immunology and Allergy, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Sevil Oskay Halaçlı
- Department of Pediatric Immunology, Hacettepe University Faculty of Medicine, İhsan Doğramacı Children's Hospital, Ankara, Turkey
| | - Çağman Tan
- Department of Pediatric Immunology, Hacettepe University Faculty of Medicine, İhsan Doğramacı Children's Hospital, Ankara, Turkey
| | - Pınar Gür Çetinkaya
- Department of Pediatric Immunology, Hacettepe University Faculty of Medicine, İhsan Doğramacı Children's Hospital, Ankara, Turkey
| | - Halil T. Akar
- Department of Pediatric Immunology, Hacettepe University Faculty of Medicine, İhsan Doğramacı Children's Hospital, Ankara, Turkey
| | - Büşra Çavdarlı
- Department of Medical Genetics, Ankara City Hospital, Ankara, Turkey
| | - Begüm Özbek
- Department of Pediatric Immunology, Hacettepe University Faculty of Medicine, İhsan Doğramacı Children's Hospital, Ankara, Turkey
| | - Deniz Çağdaş
- Department of Pediatric Immunology, Hacettepe University Faculty of Medicine, İhsan Doğramacı Children's Hospital, Ankara, Turkey
| | - İlhan Tezcan
- Department of Pediatric Immunology, Hacettepe University Faculty of Medicine, İhsan Doğramacı Children's Hospital, Ankara, Turkey
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Blom M, Bredius RGM, van der Burg M. Efficient screening strategies for severe combined immunodeficiencies in newborns. Expert Rev Mol Diagn 2023; 23:815-825. [PMID: 37599592 DOI: 10.1080/14737159.2023.2244879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 08/02/2023] [Indexed: 08/22/2023]
Abstract
INTRODUCTION Severe combined immunodeficiency (SCID) is one of the most severe forms of inborn errors of immunity (IEI), affecting both cellular and humoral immunity. Without curative treatment such as hematopoietic stem cell transplantation or gene therapy, affected infants die within the first year of life. Due to the severity of the disease, asymptomatic status early in life, and improved survival in the absence of pretransplant infections, SCID was considered a suitable candidate for newborn screening (NBS). AREAS COVERED Many countries have introduced SCID screening based on T-cell receptor excision circle (TREC) detection in their NBS programs. Screening an entire population is a radical departure from previous paradigms in the field of immunology. Efficient screening strategies are cost-efficient and balance high sensitivity while preventing high numbers of referrals. NBS for SCID is accompanied by (actionable) secondary findings, but many NBS programs have optimized their screening strategy by adjusting algorithms or including second-tier tests. Harmonization of screening terminology is of great importance for international shared learning. EXPERT OPINION The expansion of NBS is driven by the development of new test modalities and treatment options. In the near future, other techniques such as next-generation sequencing will pave the way for NBS of other IEI. Exciting times await for population-based screening programs.
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Affiliation(s)
- Maartje Blom
- Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Robbert G M Bredius
- Department of Pediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Miriam van der Burg
- Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
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Al-Mousa H, Barbouche MR. Genetics of Inborn Errors of Immunity in highly consanguineous Middle Eastern and North African populations. Semin Immunol 2023; 67:101763. [PMID: 37075586 DOI: 10.1016/j.smim.2023.101763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
Consanguineous marriages in Middle Eastern and North African (MENA) countries are deeply-rooted tradition and highly prevalent resulting into increased prevalence of autosomal recessive diseases including Inborn Errors of Immunity (IEIs). Molecular genetic testing is an important diagnostic tool for IEIs since it provides a definite diagnosis, genotype-phenotype correlation, and guide therapy. In this review, we will discuss the current state and challenges of genomic and variome studies in MENA region populations, as well as the importance of funding advanced genome projects. In addition, we will review the MENA underlying molecular genetic defects of over 2457 patients published with the common IEIs, where autosomal recessive mode of inheritance accounts for 76% of cases with increased prevalence of combined immunodeficiency diseases (50%). The efforts made in the last three decades in terms of international collaboration and of in situ capacity building in MENA region countries led to the discovery of more than 150 novel genes involved in IEIs. Expanding sequencing studies within the MENA will undoubtedly be a unique asset for the IEI genetics which can advance research, and support precise genomic diagnostics and therapeutics.
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Affiliation(s)
- Hamoud Al-Mousa
- Section of Allergy and Immunology, Department of Pediatrics, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia; College of Medicine, Alfaisal University, Riyadh, Saudi Arabia.
| | - Mohamed-Ridha Barbouche
- Department of Microbiology, Immunology and Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain.
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Baris S, Abolhassani H, Massaad MJ, Al-Nesf M, Chavoshzadeh Z, Keles S, Reisli I, Tahiat A, Shendi HM, Elaziz DA, Belaid B, Al Dhaheri F, Haskologlu S, Dogu F, Ben-Mustapha I, Sobh A, Galal N, Meshaal S, Elhawary R, El-Marsafy A, Alroqi FJ, Al-Saud B, Al-Ahmad M, Al Farsi T, Al Sukaiti N, Al-Tamemi S, Mehawej C, Dbaibo G, ElGhazali G, Kilic SS, Genel F, Kiykim A, Musabak U, Artac H, Guner SN, Boukari R, Djidjik R, Kechout N, Cagdas D, El-Sayed ZA, Karakoc-Aydiner E, Alzyoud R, Barbouche MR, Adeli M, Wakim RH, Reda SM, Ikinciogullari A, Ozen A, Bousfiha A, Al-Mousa H, Rezaei N, Al-Herz W, Geha RS. The Middle East and North Africa Diagnosis and Management Guidelines for Inborn Errors of Immunity. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2023; 11:158-180.e11. [PMID: 36265766 DOI: 10.1016/j.jaip.2022.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/07/2022] [Accepted: 10/03/2022] [Indexed: 11/09/2022]
Abstract
Human inborn errors of immunity (IEI) are a group of 485 distinct genetic disorders affecting children and adults. Signs and symptoms of IEI are heterogeneous, and accurate diagnosis can be challenging and depends on the available human expertise and laboratory resources. The Middle East and North Africa (MENA) region has an increased prevalence of IEI because of the high rate of consanguinity with a predominance of autosomal recessive disorders. This area also exhibits more severe disease phenotypes compared with other regions, probably due to the delay in diagnosis. The MENA-IEI registry network has designed protocols and guidelines for the diagnosis and treatment of IEI, taking into consideration the variable regional expertise and resources. These guidelines are primarily meant to improve the care of patients within the region, but can also be followed in other regions with similar patient populations.
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Affiliation(s)
- Safa Baris
- Faculty of Medicine, Division of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey; The Isil Berat Barlan Center for Translational Medicine, Istanbul Jeffrey Modell Foundation Diagnostic Center for Primary Immune Deficiencies, Istanbul, Turkey.
| | - Hassan Abolhassani
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran; Division of Clinical Immunology, Department of Biosciences and Nutrition, Karolinska Institute, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Michel J Massaad
- Department of Experimental Pathology, Immunology, and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon; Department of Pediatrics and Adolescent Medicine, Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon; Center for Infectious Diseases Research (CIDR) and WHO Collaborating Center for Reference and Research on Bacterial Pathogens, American University of Beirut, Beirut, Lebanon
| | - Maryam Al-Nesf
- Allergy and Immunology Division, Department of Medicine, Hamad Medical Corporation, Doha, Qatar
| | - Zahra Chavoshzadeh
- Allergy and Clinical Immunology Department, Mofid Children Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sevgi Keles
- Division of Pediatric Allergy and Immunology, Meram Faculty of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Ismail Reisli
- Division of Pediatric Allergy and Immunology, Meram Faculty of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Azzeddine Tahiat
- Laboratory of Immunology, Department of Medical Biology, University of Algiers, Rouiba Hospital, Algiers, Algeria
| | - Hiba Mohammad Shendi
- Division of Pediatric Allergy and Immunology, Tawam Hospital, Abu Dhabi, United Arab Emirates
| | - Dalia Abd Elaziz
- Department of Pediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Brahim Belaid
- Department of Medical Immunology, Beni Messous University Hospital Center, Faculty of Pharmacy, University of Algiers, Algiers, Algeria
| | - Fatima Al Dhaheri
- Department of Pediatrics, Pediatric Infectious Diseases, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Sule Haskologlu
- Department of Pediatric Immunology and Allergy, Ankara University School of Medicine, Ankara, Turkey
| | - Figen Dogu
- Department of Pediatric Immunology and Allergy, Ankara University School of Medicine, Ankara, Turkey
| | - Imen Ben-Mustapha
- Department of Immunology, Institut Pasteur de Tunis and University Tunis El Manar, Tunis, Tunisia
| | - Ali Sobh
- Department of Pediatrics, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Nermeen Galal
- Department of Pediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Safa Meshaal
- Clinical Pathology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Rabab Elhawary
- Clinical Pathology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Aisha El-Marsafy
- Department of Pediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Fayhan J Alroqi
- King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Bandar Al-Saud
- Department of Pediatrics, Division of Allergy and Immunology, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia; College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Mona Al-Ahmad
- Department of Microbiology, College of Medicine, Kuwait University, Kuwait
| | - Tariq Al Farsi
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Nashat Al Sukaiti
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Salem Al-Tamemi
- Department of Child Health, Sultan Qaboos University Hospital, Muscat, Oman
| | - Cybel Mehawej
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos, Lebanon
| | - Ghassan Dbaibo
- Department of Pediatrics and Adolescent Medicine, Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon; Center for Infectious Diseases Research (CIDR) and WHO Collaborating Center for Reference and Research on Bacterial Pathogens, American University of Beirut, Beirut, Lebanon
| | - Gehad ElGhazali
- Department of Immunology, Sheikh Khalifa Medical City-Union 71-Purehealth, Abu Dhabi, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Sara Sebnem Kilic
- Department of Pediatric Immunology and Rheumatology, Faculty of Medicine, Bursa Uludag University, Bursa, Turkey
| | - Ferah Genel
- Department of Pediatric Immunology and Allergy, University of Health Sciences Dr. Behcet Uz Children's Hospital, İzmir, Turkey
| | - Ayca Kiykim
- Division of Pediatric Allergy and Immunology, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ugur Musabak
- Department of Internal Medicine, Division of Immunology and Allergy, Faculty of Medicine, Baskent University, Ankara, Turkey
| | - Hasibe Artac
- Division of Immunology and Allergy, Department of Pediatrics, Faculty of Medicine, Selcuk University, Konya, Turkey
| | - Sukru Nail Guner
- Division of Pediatric Allergy and Immunology, Meram Faculty of Medicine, Necmettin Erbakan University, Konya, Turkey
| | - Rachida Boukari
- Department of Pediatrics, Mustapha Pacha Faculty of Medicine, Algiers University, Algeria
| | - Reda Djidjik
- Department of Medical Immunology, Beni Messous University Hospital Center, Faculty of Pharmacy, University of Algiers, Algiers, Algeria
| | - Nadia Kechout
- Department of Immunology, Pasteur Institute of Algeria, Faculty of Medicine, Algiers, Algeria
| | - Deniz Cagdas
- Department of Pediatrics, Section of Pediatric Immunology, Ihsan Dogramaci Children's Hospital, Institute of Child Health, Hacettepe University Medical School, Ankara, Turkey
| | - Zeinab Awad El-Sayed
- Pediatric Allergy, Immunology and Rheumatology Unit, Department of Pediatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Elif Karakoc-Aydiner
- Faculty of Medicine, Division of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey; The Isil Berat Barlan Center for Translational Medicine, Istanbul Jeffrey Modell Foundation Diagnostic Center for Primary Immune Deficiencies, Istanbul, Turkey
| | - Raed Alzyoud
- Section of Immunology, Allergy and Rheumatology, Queen Rania Children Hospital, Amman, Jordan
| | - Mohamed Ridha Barbouche
- Department of Immunology, Institut Pasteur de Tunis and University Tunis El Manar, Tunis, Tunisia
| | - Mehdi Adeli
- Department of Immunology, Sidra Medicine, Ar-Rayyan, Qatar
| | - Rima Hanna Wakim
- Department of Pediatrics and Adolescent Medicine, Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon; Center for Infectious Diseases Research (CIDR) and WHO Collaborating Center for Reference and Research on Bacterial Pathogens, American University of Beirut, Beirut, Lebanon
| | - Shereen M Reda
- Pediatric Allergy, Immunology and Rheumatology Unit, Department of Pediatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Aydan Ikinciogullari
- Department of Pediatric Immunology and Allergy, Ankara University School of Medicine, Ankara, Turkey
| | - Ahmet Ozen
- Faculty of Medicine, Division of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey; The Isil Berat Barlan Center for Translational Medicine, Istanbul Jeffrey Modell Foundation Diagnostic Center for Primary Immune Deficiencies, Istanbul, Turkey
| | - Aziz Bousfiha
- Laboratory of Clinical Immunology, Inflammation and Allergy, Faculty of Medicine and Pharmacy of Casablanca, Department of pediatric infectious and immunological diseases, Ibn Rushd Children Hospital, King Hassan II University, Casablanca, Morocco
| | - Hamoud Al-Mousa
- Department of Pediatrics, Division of Allergy and Immunology, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia; College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran; Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Waleed Al-Herz
- Department of Pediatrics, Faculty of Medicine, Kuwait University, Safat, Kuwait City, Kuwait; Allergy and Clinical Immunology Unit, Pediatric Department, Al-Sabah Hospital, Kuwait City, Kuwait
| | - Raif S Geha
- Division of Immunology, Boston Children's Hospital and Harvard Medical School, Boston, Mass
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Al-Herz W, Ziyab AH, Adeli M, Al Farsi T, Al-Hammadi S, Al Kuwaiti AA, Al-Nesf M, Al Sukaiti N, Al-Tamemi S, Shendi H. Predictors of early death risk among untransplanted patients with combined immunodeficiencies affecting cellular and humoral immunity: A multicenter report. Pediatr Allergy Immunol 2022; 33:e13901. [PMID: 36564872 DOI: 10.1111/pai.13901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 12/02/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND There is an increased demand for hematopoietic stem cell transplant (HSCT) to treat various diseases including combined immunodeficiencies (CID), with limited worldwide availability. Variables affecting the decision regarding CID patients' prioritization for HSCT are not known. We aimed to determine general, clinical, and immunologic factors associated with the higher risk of early death (≤6 months after diagnosis) in untransplanted CID patients. METHODS Data collection was done retrospectively from five centers and included general patients' information, and clinical and laboratory variables. Inclusion criteria were untransplanted patients who are either dead or alive with a follow-up period ≥6 months after diagnosis. RESULTS Two hundred and thirty-six CID patients were reported by participating centers, of whom 111 were included in the study with a cumulative follow-up period of 278.6 years. Seventy-two patients died with the median age of death of 10.5 months. 35.1% of the patients succumbed within 6 months after the diagnosis. Having a history of Candida infections, sepsis or hepatomegaly was associated with an increased risk of early death. None of the other general or clinical variables was associated with such risk. Bivariate analysis of lymphocyte subsets showed that patients with the following counts: CD3+ < 100, CD4+ < 200, CD8+ < 50, or CD16+ CD56+ <200 cells/μl had increased risk of early death. In adjusted analysis, increased risk of early death was observed among patients with CD3+ count <100 cells/μl. CONCLUSION Combined immunodeficiencies patients with a history of Candida infections, sepsis, hepatomegaly, or severe T-lymphopenia should be given priority for HSCT to avoid early death.
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Affiliation(s)
- Waleed Al-Herz
- Department of Pediatrics, College of Medicine, Kuwait University, Kuwait City, Kuwait.,Allergy and Clinical Immunology Unit, Pediatric Department, Al-Sabah Hospital, Kuwait City, Kuwait
| | - Ali H Ziyab
- Department of Community Medicine and Behavioral Sciences, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Mehdi Adeli
- Division of Immunology and Allergy, Sidra Medicine and Hamad Medical Corporation, Doha, Qatar
| | - Tariq Al Farsi
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Suleiman Al-Hammadi
- College of Medicine, Mohammed Bin Rashid University for Medicine and Health Sciences, Dubai, United Arab Emirates.,Al Jalila Children's Hospital, Dubai, United Arab Emirates
| | | | - Maryam Al-Nesf
- Division of Allergy and Immunology, Internal Medicine, Hamad Medical Corporation, Doha, Qatar
| | - Nashat Al Sukaiti
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Salem Al-Tamemi
- Department of Child Health, Sultan Qaboos University Hospital, Muscat, Oman
| | - Hiba Shendi
- Department of Pediatrics, Tawam Hospital, Al-Ain, United Arab Emirates
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8
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Lev A, Sharir I, Simon AJ, Levy S, Lee YN, Frizinsky S, Daas S, Saraf-Levy T, Broides A, Nahum A, Hanna S, Stepensky P, Toker O, Dalal I, Etzioni A, Stein J, Adam E, Hendel A, Marcus N, Almashanu S, Somech R. Lessons Learned From Five Years of Newborn Screening for Severe Combined Immunodeficiency in Israel. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2022; 10:2722-2731.e9. [PMID: 35487367 DOI: 10.1016/j.jaip.2022.04.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 03/03/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Implementation of newborn screening (NBS) programs for severe combined immunodeficiency (SCID) have advanced the diagnosis and management of affected infants and undoubtedly improved their outcomes. Reporting long-term follow-up of such programs is of great importance. OBJECTIVE We report a 5-year summary of the NBS program for SCID in Israel. METHODS Immunologic and genetic assessments, clinical analyses, and outcome data from all infants who screened positive were evaluated and summarized. RESULTS A total of 937,953 Guthrie cards were screened for SCID. A second Guthrie card was requested on 1,169 occasions (0.12%), which resulted in 142 referrals (0.015%) for further validation tests. Flow cytometry immune-phenotyping, T cell receptor excision circle measurement in peripheral blood, and expression of TCRVβ repertoire for the validation of positive cases revealed a specificity and sensitivity of 93.7% and 75.9%, respectively, in detecting true cases of SCID. Altogether, 32 SCID and 110 non-SCID newborns were diagnosed, making the incidence of SCID in Israel as high as 1:29,000 births. The most common genetic defects in this group were associated with mutations in DNA cross-link repair protein 1C and IL-7 receptor α (IL-7Rα) genes. No infant with SCID was missed during the study time. Twenty-two SCID patients underwent hematopoietic stem cell transplantation, which resulted in a 91% survival rate. CONCLUSIONS Newborn screening for SCID should ultimately be applied globally, specifically to areas with high rates of consanguineous marriages. Accumulating data from follow-up studies on NBS for SCID will improve diagnosis and treatment and enrich our understanding of immune development in health and disease.
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Affiliation(s)
- Atar Lev
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel; Mina and Everard Goodman Faculty of Life Sciences, Advanced Materials and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan, Israel
| | - Idan Sharir
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Amos J Simon
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel; Hemato-Immunology Unit, Hematology Lab, Sheba Medical Center, Tel HaShomer, Israel
| | - Shiran Levy
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Yu Nee Lee
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Shirly Frizinsky
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Suha Daas
- National Newborn Screening Program, Ministry of Health, Tel-HaShomer, Israel
| | - Talia Saraf-Levy
- National Newborn Screening Program, Ministry of Health, Tel-HaShomer, Israel
| | - Arnon Broides
- Pediatric Immunology, Soroka University Medical Center, Beer-Sheva, Israel; Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY
| | - Amit Nahum
- Pediatric Immunology, Soroka University Medical Center, Beer-Sheva, Israel; Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; Primary Immunodeficiency Research Laboratory, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Suhair Hanna
- Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; Ruth Children Hospital, Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Polina Stepensky
- Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; Department of Bone Marrow Transplantation, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ori Toker
- Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; Faculty of Medicine, Hebrew University of Jerusalem, Israel; Allergy and Immunology Unit, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Ilan Dalal
- Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; Department of Pediatrics, Pediatric Allergy Unit, E. Wolfson Medical Center, Holon, Israel, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Amos Etzioni
- Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; Ruth Children Hospital, Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Jerry Stein
- Department for Hemato-Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Etai Adam
- Division of Pediatric Hematology and Oncology, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Ramat-Gan, Israel
| | - Ayal Hendel
- Mina and Everard Goodman Faculty of Life Sciences, Advanced Materials and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan, Israel
| | - Nufar Marcus
- Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; Allergy and Immunology Unit, Schneider Children's Medical Center of Israel, Felsenstein Medical Research Center, Kipper Institute of Immunology, Petach Tikva, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
| | - Shlomo Almashanu
- National Newborn Screening Program, Ministry of Health, Tel-HaShomer, Israel.
| | - Raz Somech
- Pediatric Department A and the Immunology Service, Jeffrey Modell Foundation Center, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, affiliated to the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel; Jeffrey Modell Foundation Israeli Network for Primary Immunodeficiency, New York, NY; National Lab for Confirming Primary Immunodeficiency in Newborn Screening Center for Newborn Screening, Ministry of Health, Tel HaShomer, Israel.
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9
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Boyarchuk O, Yarema N, Kravets V, Shulhai O, Shymanska I, Chornomydz I, Hariyan T, Volianska L, Kinash M, Makukh H. Newborn screening for severe combined immunodeficiency: The results of the first pilot TREC and KREC study in Ukraine with involving of 10,350 neonates. Front Immunol 2022; 13:999664. [PMID: 36189201 PMCID: PMC9521488 DOI: 10.3389/fimmu.2022.999664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 08/29/2022] [Indexed: 11/21/2022] Open
Abstract
Severe combined immunodeficiency (SCID) is a group of inborn errors of immunity (IEI) characterized by severe T- and/or B-lymphopenia. At birth, there are usually no clinical signs of the disease, but in the first year of life, often in the first months the disease manifests with severe infections. Timely diagnosis and treatment play a crucial role in patient survival. In Ukraine, the expansion of hemostatic stem cell transplantation and the development of a registry of bone marrow donors in the last few years have created opportunities for early correction of IEI and improving the quality and life expectancy of children with SCID. For the first time in Ukraine, we initiated a pilot study on newborn screening for severe combined immunodeficiency and T-cell lymphopenia by determining T cell receptor excision circles (TRECs) and kappa-deleting recombination excision circles (KRECs). The analysis of TREC and KREC was performed by real-time polymerase chain reaction (RT-PCR) followed by analysis of melting curves in neonatal dry blood spots (DBS). The DBS samples were collected between May 2020 and January 2022. In total, 10,350 newborns were screened. Sixty-five blood DNA samples were used for control: 25 from patients with ataxia-telangiectasia, 37 - from patients with Nijmegen breakage syndrome, 1 – with X-linked agammaglobulinemia, 2 – with SCID (JAK3 deficiency and DCLRE1C deficiency). Retest from the first DBS was provided in 5.8% of patients. New sample test was needed in 73 (0.7%) of newborns. Referral to confirm or rule out the diagnosis was used in 3 cases, including one urgent abnormal value. CID (TlowB+NK+) was confirmed in a patient with the urgent abnormal value. The results of a pilot study in Ukraine are compared to other studies (the referral rate 1: 3,450). Approbation of the method on DNA samples of children with ataxia-telangiectasia and Nijmegen syndrome showed a high sensitivity of TRECs (a total of 95.2% with cut-off 2000 copies per 106 cells) for the detection of these diseases. Thus, the tested method has shown its effectiveness for the detection of T- and B-lymphopenia and can be used for implementation of newborn screening for SCID in Ukraine.
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Affiliation(s)
- Oksana Boyarchuk
- Department of Children's Diseases and Pediatric Surgery, I.Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
- *Correspondence: Oksana Boyarchuk,
| | - Nataliia Yarema
- Department of Children's Diseases and Pediatric Surgery, I.Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Volodymyr Kravets
- Department of the Research and Biotechnology of Scientific Medical Genetic Center "Leogene, LTD", Lviv, Ukraine
| | - Oleksandra Shulhai
- Department of Children's Diseases and Pediatric Surgery, I.Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Ivanna Shymanska
- Department of the Research and Biotechnology of Scientific Medical Genetic Center "Leogene, LTD", Lviv, Ukraine
| | - Iryna Chornomydz
- Department of Children's Diseases and Pediatric Surgery, I.Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Tetyana Hariyan
- Department of Children's Diseases and Pediatric Surgery, I.Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Liubov Volianska
- Department of Children's Diseases and Pediatric Surgery, I.Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Maria Kinash
- Department of Children's Diseases and Pediatric Surgery, I.Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Halyna Makukh
- Department of the Research and Biotechnology of Scientific Medical Genetic Center "Leogene, LTD", Lviv, Ukraine
- Department of the Diagnostics of Hereditary Pathology, Institute of Hereditary Pathology of the Ukrainian National Academy of Medical Sciences, Lviv, Ukraine
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Yilmaz M, Potts DE, Geier C, Walter JE. Can we identify WHIM in infancy? Opportunities with the public newborn screening process. AMERICAN JOURNAL OF MEDICAL GENETICS. PART C, SEMINARS IN MEDICAL GENETICS 2022; 190:215-221. [PMID: 36210583 DOI: 10.1002/ajmg.c.32002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
Newborn screening (NBS) for severe combined immunodeficiency (SCID) utilizing T-cell receptor excision circles (TRECs) has been implemented in all 50 states as of December 2018 and has been transformative for the clinical care of SCID patients. Though having high sensitivity for SCID, NBS-SCID has low specificity, therefore is able to detect other causes of lymphopenia in newborns including many inborn errors of immunity (IEIs). In a recent study, three of six newborns later diagnosed with Warts, Hypogammaglobulinemia, Infections, and Myelokathexis (WHIM) syndrome were found to have a low TRECs and lymphopenia at birth. This presents an opportunity to increase the detection and diagnosis of WHIM syndrome by NBS-SCID with immunological follow-up along with a combination of flow cytometry for immune cell subsets, absolute neutrophil count, and genetic testing, extending beyond the conventional bone marrow studies. Coupled with emerging technologies such as next-generation sequencing, transcriptomics and proteomics, dried blood spots used in NBS-SCID will promote earlier detection, diagnosis, and therefore treatment of IEIs such as WHIM syndrome.
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Affiliation(s)
- Melis Yilmaz
- Division of Allergy and Immunology, Department of Pediatrics and Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
- Division of Allergy and Immunology, Department of Pediatrics, Johns Hopkins All Children's Hospital, St Petersburg, Florida, USA
| | - David Evan Potts
- Division of Allergy and Immunology, Department of Pediatrics and Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
- Division of Allergy and Immunology, Department of Pediatrics, Johns Hopkins All Children's Hospital, St Petersburg, Florida, USA
| | - Christoph Geier
- Department of Rheumatology and Clinical Immunology, University Medical Center Freiburg, Freiburg, Germany
- Center for Chronic Immunodeficiency (CCI), University Medical Center Freiburg, Freiburg, Germany
| | - Jolan E Walter
- Division of Allergy and Immunology, Department of Pediatrics and Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
- Division of Allergy and Immunology, Department of Pediatrics, Johns Hopkins All Children's Hospital, St Petersburg, Florida, USA
- Division of Allergy and Immunology, Massachusetts General Hospital for Children, Boston, Massachusetts, USA
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11
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Al Farsi T, Ahmed K, Alshekaili J, Al Kindi M, Cook M, Al-Hosni A, Ansari Z, Nasr I, Al Sukaiti N. Immune Dysregulation in Monogenic Inborn Errors of Immunity in Oman: Over A Decade of Experience From a Single Tertiary Center. Front Immunol 2022; 13:849694. [PMID: 35464432 PMCID: PMC9019296 DOI: 10.3389/fimmu.2022.849694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
Background Inborn errors of immunity (IEIs) are being recognized as an important cause of morbidity and mortality in communities with a high frequency of consanguinity, such as Oman, and thus recessively inherited conditions. Various monogenic causes of IEI have been recently discovered; however, the disease phenotype may be variable and does not always include infection at presentation, leading to a delay in diagnosis and a poor outcome. It is now well recognized that immune dysregulation manifestations are observed in a significant proportion of patients with IEI and occasionally precede infection. Methods Here, we retrospectively report the epidemiological, clinical, immunological, and molecular findings and outcomes from 239 patients with IEI who were diagnosed and managed at the Royal Hospital, Oman, from January 2010 to October 2021. Results The estimated annual cumulative mean incidence of IEI was 25.5 per 100,000 Omani live births with a total prevalence of 15.5 per 100,000 Omani population. Both the high incidence and prevalence are attributed to the high rate of consanguinity (78.2%). Defects affecting cellular and humoral immunity including severe combined immunodeficiency (SCID), combined immunodeficiency (CID), and CID with syndromic features were the predominant defects in IEI (36%). Immune dysregulation was a prominent manifestation and occurred in approximately a third of all patients with IEI (32%), with a mean age of onset of 81 months and a mean diagnostic delay of 50.8 months. The largest percentage of patients who showed such clinical signs were in the category of diseases of immune dysregulation (41%), followed by predominantly antibody deficiency (18%). The overall mortality rate in our cohort was 25.1%, with higher death rates seen in CID including SCID and diseases of immune dysregulation. Conclusion Immune dysregulation is a frequent manifestation of Omani patients with IEI. Early detection through raising awareness of signs of IEI including those of immune dysregulation and implementation of newborn screening programs will result in early intervention and improved overall outcome.
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Affiliation(s)
- Tariq Al Farsi
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Khwater Ahmed
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Jalila Alshekaili
- Department of Microbiology and Immunology, Sultan Qaboos University Hospital, Muscat, Oman
| | - Mahmood Al Kindi
- Department of Microbiology and Immunology, Sultan Qaboos University Hospital, Muscat, Oman
| | - Matthew Cook
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, NSW, Australia.,Translational Research Unit, Department of Immunology, The Canberra Hospital, Canberra, NSW, Australia.,Centre for Personalized Immunology (National Health and Medical Research Council (NHMRC) Centre of Research Excellence), John Curtin School of Medical Research, Australian National University, Canberra, NSW, Australia
| | - Aliya Al-Hosni
- Molecular Genetics, National Genetics Center, Muscat, Oman
| | - Zainab Ansari
- Department of Adult Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Iman Nasr
- Department of Adult Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Nashat Al Sukaiti
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
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12
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Aykut A, Durmaz A, Karaca N, Gülez N, Genel F, Celmeli F, Ozturk G, Atay D, Aydogmus C, Kiykim A, Aksu G, Kutukculer N. Severe Combined immunodeficiencies: Expanding the mutation spectrum in Turkey and identification of 12 novel variants. Scand J Immunol 2022; 95:e13163. [PMID: 35303369 DOI: 10.1111/sji.13163] [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: 10/18/2021] [Revised: 03/08/2022] [Accepted: 03/13/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Human Inborn Errors of Immunity (IEIs) are clinically and genetically heterogeneous group of diseases, with relatively mild clinical course or severe types that can be life-threatening. Severe combined immunodeficiency (SCID) is the most severe form of IEIs, which is caused by monogenic defects that impair the proliferation and function of T, B, and NK cells. According to the most recent report by the International Union of Immunological Societies (IUIS), SCID caused by mutations in IL2RG, JAK3, FOXN1, CORO1A, PTPRC, CD3D, CD3E, CD247, ADA, AK2, NHEJ1, LIG4, PRKDC, DCLRE1C, RAG1 and RAG2 genes. METHODS The targeted next-generation sequencing (TNGS) workflow based on Ion AmpliSeq™ Primary Immune Deficiency Research Panel was designed for sequencing 264 IEI related genes on Ion S5™ Sequencer. RESULTS Herein, we present 21 disease-causing variants (12 novel) which were identified in 22 patients in 8 different SCID genes. CONCLUSION Next generation sequencing allowed a rapid and an accurate diagnosis SCID patients.
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Affiliation(s)
- Ayca Aykut
- Ege University, Faculty of Medicine Department of Medical Genetics
| | - Asude Durmaz
- Ege University, Faculty of Medicine Department of Medical Genetics
| | - Neslihan Karaca
- Ege University, Faculty of Medicine, Department of Pediatric Health and Diseases, Department of Pediatric Immunology
| | - Nesrin Gülez
- Saglık Bilimleri University Dr. Behcet Uz Pediatric Diseases and Surgery Training and Research Hospital Pediatric Immunology and Allergy Diseases
| | - Ferah Genel
- Saglık Bilimleri University Dr. Behcet Uz Pediatric Diseases and Surgery Training and Research Hospital Pediatric Immunology and Allergy Diseases
| | - Fatih Celmeli
- Ministry of Health Antalya Training and Research Hospital Pediatric Immunology and Allergy Diseases, Turkey
| | - Gulyuz Ozturk
- Acıbadem Mehmet Ali Aydınlar University, Department of Pediatric Hematology /Oncology/BMT unit
| | - Didem Atay
- Acıbadem Mehmet Ali Aydınlar University, Department of Pediatric Hematology /Oncology/BMT unit
| | - Cigdem Aydogmus
- Saglık Bilimleri University Basaksehir Cam and Sakura City Hospital Pediatric Immunology
| | - Ayca Kiykim
- Istanbul University-Cerrahpasa, Cerrahpasa Medical School, Department of Pediatrics, Division of Pediatric Allergy and Immunology
| | - Guzide Aksu
- Ege University, Faculty of Medicine, Department of Pediatric Health and Diseases, Department of Pediatric Immunology
| | - Necil Kutukculer
- Ege University, Faculty of Medicine, Department of Pediatric Health and Diseases, Department of Pediatric Immunology
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13
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Implementation of TREC/KREC detection protocol for newborn SCID screening in Bulgaria: a pilot study. Cent Eur J Immunol 2022; 47:339-349. [PMID: 36817401 PMCID: PMC9901256 DOI: 10.5114/ceji.2022.124396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 12/16/2022] [Indexed: 02/04/2023] Open
Abstract
Neonatal screening for inborn errors of immunity (IEI), based on quantification of T-cell-receptor- excision circles (TRECs) and kappa-deleting recombination-excision circles (KRECs) from dried blood spots (DBS), allows early diagnosis and improved outcomes for the affected children. Determination of TREC/KREC levels from prospectively collected newborns' Guthrie cards and from DBS samples of patients with confirmed IEI was done using a commercial kit. Retrospective assessment of flow cytometry evaluation of TREC/KREC correspondence with lymphocyte subpopulations and evaluation of the correlations between TREC and KREC with immune cells, based on the data from patients with suspected or confirmed immune disorders, were conducted. 2,228 Guthrie cards were tested, 1276 for TREC only and 952 for both TREC and KREC. Eight newborns (0.36%) were TREC positive and 10 (1.05%) had KREC below the cut-off. The re-testing rate was 1.88%. Retrospective analysis demonstrated that the TREC/KREC assay identifies 100% of severe combined immune deficiencies (SCID) cases when DBS were collected at birth. Correlation analysis showed moderate significant correlations between TREC and the absolute numbers of CD4 cells (r = 0.634, p < 0.01) and total T cells (r = 0.536, p < 0.01). The ability of KREC levels to predict abnormal absolute (AUC of 0.772) and relative (AUC 0.731) levels of B cells was demonstrated.
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14
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Blom M, Bredius RGM, van der Burg M. Future Perspectives of Newborn Screening for Inborn Errors of Immunity. Int J Neonatal Screen 2021; 7:ijns7040074. [PMID: 34842618 PMCID: PMC8628921 DOI: 10.3390/ijns7040074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/10/2021] [Accepted: 10/15/2021] [Indexed: 11/16/2022] Open
Abstract
Newborn screening (NBS) programs continue to expand due to innovations in both test methods and treatment options. Since the introduction of the T-cell receptor excision circle (TREC) assay 15 years ago, many countries have adopted screening for severe combined immunodeficiency (SCID) in their NBS program. SCID became the first inborn error of immunity (IEI) in population-based screening and at the same time the TREC assay became the first high-throughput DNA-based test in NBS laboratories. In addition to SCID, there are many other IEI that could benefit from early diagnosis and intervention by preventing severe infections, immune dysregulation, and autoimmunity, if a suitable NBS test was available. Advances in technologies such as KREC analysis, epigenetic immune cell counting, protein profiling, and genomic techniques such as next-generation sequencing (NGS) and whole-genome sequencing (WGS) could allow early detection of various IEI shortly after birth. In the next years, the role of these technical advances as well as ethical, social, and legal implications, logistics and cost will have to be carefully examined before different IEI can be considered as suitable candidates for inclusion in NBS programs.
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Affiliation(s)
- Maartje Blom
- Laboratory for Pediatric Immunology, Department of Pediatrics, Willem-Alexander Children’s Hospital, Leiden University Medical Center, 2300 RC Leiden, The Netherlands;
- Correspondence:
| | - Robbert G. M. Bredius
- Department of Pediatrics, Willem-Alexander Children’s Hospital, Leiden University Medical Center, 2300 RC Leiden, The Netherlands;
| | - Mirjam van der Burg
- Laboratory for Pediatric Immunology, Department of Pediatrics, Willem-Alexander Children’s Hospital, Leiden University Medical Center, 2300 RC Leiden, The Netherlands;
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15
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DInur-Schejter Y, Stepensky P. Social determinants of health and primary immunodeficiency. Ann Allergy Asthma Immunol 2021; 128:12-18. [PMID: 34628007 DOI: 10.1016/j.anai.2021.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 10/01/2021] [Accepted: 10/04/2021] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Inborn errors of immunity (IEI) are rare genetic conditions affecting the immune system. The rate of IEI and their presentation, course, and treatment are all affected by a multitude of social determinants, eventually affecting prognosis. This review summarizes the current knowledge of the social determinants affecting infectious susceptibility, genetic predisposition, diagnosis, and treatment of IEI. DATA SOURCES PubMed. STUDY SELECTIONS Search terms included "consanguinity," "social determinants," and "founder effect." Further studies were selected based on relevant citations. RESULTS Changes in climate and human behavior have modulated the spread of disease vectors and infectious organisms. Consanguinity increases the rate of autosomal recessive conditions, changes the distribution, and affects the severity of IEI. Access to sophisticated genetic and immunologic diagnostic modalities affects genetic counseling and timely diagnosis. Effective genetic counseling should address to the patient's genetic background and ethical code. Access to appropriate and timely treatment of immunodeficiencies is scarce in some regions of the world. CONCLUSION High consanguinity rate and reduced access to prophylactic measures increase the burden of immunodeficiencies in many low- and medium-income countries. Furthermore, poor access to diagnostic and treatment modalities in these regions adversely affects patients' prognosis. Increased awareness among health care professionals and the public and increased collaboration with Western countries aid in diagnosis of these conditions. Further advancements require improved public funding to the prevention, diagnosis, and treatment of IEI.
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Affiliation(s)
- Yael DInur-Schejter
- Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel; Department of Bone Marrow Transplantation and Cancer Immunotherapy, Hadassah Ein Kerem Medical Center, Jerusalem, Israel.
| | - Polina Stepensky
- Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel; Department of Bone Marrow Transplantation and Cancer Immunotherapy, Hadassah Ein Kerem Medical Center, Jerusalem, Israel
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16
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Blom M, Zetterström RH, Stray-Pedersen A, Gilmour K, Gennery AR, Puck JM, van der Burg M. Recommendations for uniform definitions used in newborn screening for severe combined immunodeficiency. J Allergy Clin Immunol 2021; 149:1428-1436. [PMID: 34537207 DOI: 10.1016/j.jaci.2021.08.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/06/2021] [Accepted: 08/23/2021] [Indexed: 01/31/2023]
Abstract
BACKGROUND Public health newborn screening (NBS) programs continuously evolve, taking advantage of international shared learning. NBS for severe combined immunodeficiency (SCID) has recently been introduced in many countries. However, comparison of screening outcomes has been hampered by use of disparate terminology and imprecise or variable case definitions for non-SCID conditions with T-cell lymphopenia. OBJECTIVES This study sought to determine whether standardized screening terminology could overcome a Babylonian confusion and whether improved case definitions would promote international exchange of knowledge. METHODS A systematic literature review highlighted the diverse terminology in SCID NBS programs internationally. While, as expected, individual screening strategies and tests were tailored to each program, we found uniform terminology to be lacking in definitions of disease targets, sensitivity, and specificity required for comparisons across programs. RESULTS The study's recommendations reflect current evidence from literature and existing guidelines coupled with opinion of experts in public health screening and immunology. Terminologies were aligned. The distinction between actionable and nonactionable T-cell lymphopenia among non-SCID cases was clarified, the former being infants with T-cell lymphopenia who could benefit from interventions such as protection from infections, antibiotic prophylaxis, and live-attenuated vaccine avoidance. CONCLUSIONS By bringing together the previously unconnected public health screening community and clinical immunology community, these SCID NBS deliberations bridged the gaps in language and perspective between these disciplines. This study proposes that international specialists in each disorder for which NBS is performed join forces to hone their definitions and recommend uniform registration of outcomes of NBS. Standardization of terminology will promote international exchange of knowledge and optimize each phase of NBS and follow-up care, advancing health outcomes for children worldwide.
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Affiliation(s)
- Maartje Blom
- Department of Pediatrics, Laboratory for Pediatric Immunology, Leiden University Medical Center, Leiden, The Netherlands
| | - Rolf H Zetterström
- Centre for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm, Sweden; Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Asbjørg Stray-Pedersen
- Norwegian National Unit for Newborn Screening, Division of Pediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway; Department of Pediatrics, Division of Pediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Kimberly Gilmour
- University College London Great Ormond Street Institute of Child Health, London, United Kingdom; Great Ormond Street Hospital for Children National Health Service Foundation Trust, London, United Kingdom; National Institute for Health Research-Great Ormond Street Hospital Biomedical Research Center, London, United Kingdom
| | - Andrew R Gennery
- Children's Bone Marrow Transplant Unit, Great North Children's Hospital, Newcastle upon Tyne, United Kingdom; Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Jennifer M Puck
- Division of Allergy, Immunology, and Blood and Marrow Transplantation, Department of Pediatrics, University of California, San Francisco School of Medicine, San Francisco, Calif; University of California, San Francisco Benioff Children's Hospital San Francisco, San Francisco, Calif
| | - Mirjam van der Burg
- Department of Pediatrics, Laboratory for Pediatric Immunology, Leiden University Medical Center, Leiden, The Netherlands.
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Blom M, Pico-Knijnenburg I, Imholz S, Vissers L, Schulze J, Werner J, Bredius R, van der Burg M. Second Tier Testing to Reduce the Number of Non-actionable Secondary Findings and False-Positive Referrals in Newborn Screening for Severe Combined Immunodeficiency. J Clin Immunol 2021; 41:1762-1773. [PMID: 34370170 PMCID: PMC8604867 DOI: 10.1007/s10875-021-01107-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/20/2021] [Indexed: 11/30/2022]
Abstract
Purpose Newborn screening (NBS) for severe combined immunodeficiency (SCID) is based on the detection of T-cell receptor excision circles (TRECs). TRECs are a sensitive biomarker for T-cell lymphopenia, but not specific for SCID. This creates a palette of secondary findings associated with low T-cells that require follow-up and treatment or are non-actionable. The high rate of (non-actionable) secondary findings and false-positive referrals raises questions about the harm-benefit-ratio of SCID screening, as referrals are associated with high emotional impact and anxiety for parents. Methods An alternative quantitative TREC PCR with different primers was performed on NBS cards of referred newborns (N = 56) and epigenetic immune cell counting was used as for relative quantification of CD3 + T-cells (N = 59). Retrospective data was used to determine the reduction in referrals with a lower TREC cutoff value or an adjusted screening algorithm. Results When analyzed with a second PCR with different primers, 45% of the referrals (25/56) had TREC levels above cutoff, including four false-positive cases in which two SNPs were identified. With epigenetic qPCR, 41% (24/59) of the referrals were within the range of the relative CD3 + T-cell counts of the healthy controls. Lowering the TREC cutoff value or adjusting the screening algorithm led to lower referral rates but did not prevent all false-positive referrals. Conclusions Second tier tests and adjustments of cutoff values or screening algorithms all have the potential to reduce the number of non-actionable secondary findings in NBS for SCID, although second tier tests are more effective in preventing false-positive referrals. Supplementary Information The online version contains supplementary material available at 10.1007/s10875-021-01107-2.
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Affiliation(s)
- Maartje Blom
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Ingrid Pico-Knijnenburg
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Sandra Imholz
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Lotte Vissers
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Janika Schulze
- Department of Research and Development, Epimune GmbH, Belin, Germany
| | - Jeannette Werner
- Department of Research and Development, Epimune GmbH, Belin, Germany
| | - Robbert Bredius
- Department of Pediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, the Netherlands
| | - Mirjam van der Burg
- Department of Pediatrics, Laboratory for Pediatric Immunology, Willem-Alexander Children's Hospital, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands.
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Newborn Screening for Severe Combined Immunodeficiency Using the Multiple of the Median Values of T-Cell Receptor Excision Circles. Int J Neonatal Screen 2021; 7:ijns7030043. [PMID: 34287245 PMCID: PMC8293254 DOI: 10.3390/ijns7030043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/29/2021] [Accepted: 07/08/2021] [Indexed: 02/05/2023] Open
Abstract
All newborn screening programs screen for severe combined immunodeficiency by measurement of T-cell receptor excision circles (TRECs). Herein, we report our experience of reporting TREC assay results as multiple of the median (MoM) rather than using conventional copy numbers. This modification simplifies the assay by eliminating the need for standards with known TREC copy numbers. Furthermore, since MoM is a measure of how far an individual test result deviates from the median, it allows normalization of TREC assay data from different laboratories, so that individual test results can be compared regardless of the particular method, assay, or reagents used.
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Newborn Screening for Severe Combined Immunodeficiency: Do Preterm Infants Require Special Consideration? Int J Neonatal Screen 2021; 7:ijns7030040. [PMID: 34287233 PMCID: PMC8293075 DOI: 10.3390/ijns7030040] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/01/2021] [Accepted: 07/05/2021] [Indexed: 11/17/2022] Open
Abstract
The Wisconsin Newborn Screening (NBS) Program began screening for severe combined immunodeficiency (SCID) in 2008, using real-time PCR to quantitate T-cell receptor excision circles (TRECs) in DNA isolated from dried blood NBS specimens. Prompted by the observation that there were disproportionately more screening-positive cases in premature infants, we performed a study to assess whether there is a difference in TRECs between full-term and preterm newborns. Based on de-identified SCID data from 1 January to 30 June 2008, we evaluated the TRECs from 2510 preterm newborns (gestational age, 23-36 weeks) whose specimens were collected ≤72 h after birth. The TRECs from 5020 full-term newborns were included as controls. The relationship between TRECs and gestational age in weeks was estimated using linear regression analysis. The estimated increase in TRECs for every additional week of gestation is 9.60%. The 95% confidence interval is 8.95% to 10.25% (p ≤ 0.0001). Our data suggest that TRECs increase at a steady rate as gestational age increases. These results provide rationale for Wisconsin's existing premature infant screening procedure of recommending repeat NBS following an SCID screening positive in a premature infant instead of the flow cytometry confirmatory testing for SCID screening positives in full-term infants.
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Cagdas D, Halacli SO, Tan C, Esenboğa S, Karaatmaca B, Cetinkaya PG, Balcı-Hayta B, Ayhan A, Uner A, Orhan D, Boztug K, Özen S, Topaloğlu R, Sanal O, Tezcan İ. Diversity in STK4 Deficiency and Review of the Literature. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2021; 9:3752-3766.e4. [PMID: 34146746 DOI: 10.1016/j.jaip.2021.05.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 05/23/2021] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Serine-threonine kinase-4 (STK4) deficiency is an autosomal recessive (AR) combined immunodeficiency (CID). OBJECTIVE We aimed to define characteristic clinical and laboratory features to aid the differential diagnosis and determine the most suitable therapy. METHODS In addition to nine patients diagnosed, we reviewed 15 patients from medical literature. We compared B lymphocyte subgroups of our cohort with age-matched healthy controls. RESULTS In our cohort, the median age at symptom onset and age of diagnosis are 6years-8months (mo)(6-248mo) and 7years-5mo (6-260mo), respectively. The main clinical findings were infections (9/9), autoimmune/inflammatory diseases (7/9), and atopy (4/9). CD4 lymphopenia (9/9), lymphopenia (7/9), intermittent eosinophilia (4/9), transient neutropenia (3/9), low immunoglobulin (Ig) M (4/9), and high IgE (4/9) were common. Decreased recent thymic emigrants, naive and central memory T cells, albeit increased effector memory T cells were present. The increase in plasmablasts (p=0.003) and the decrease in switched memory B cells (p=0.022) were significant. Out of a total of 24 patients, cutaneous viral infections (n=20), recurrent pneumonia (n=18), Epstein Barr Virus (EBV)-associated lymphoproliferation (n=11), atopic dermatitis (n=10), autoimmune cytopenia (n=7), and lymphoma (n=6) were frequently seen. Lymphopenia, CD4 lymphopenia, high Ig G, A, and E were the most common laboratory characteristics. CONCLUSION The differential diagnosis with AR-hyperimmunoglobulin E syndrome is crucial as atopy and CD4 lymphopenia are prominent in both diseases. Immunoglobulins and antibacterial/antiviral prophylaxis are the mainstays of treatment. Clinicians may use immunomodulatory therapies during inflammatory/autoimmune complications. However, more data is needed to recommend hematopoietic stem cell transplantation (HSCT) as a safe therapy.
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Affiliation(s)
- Deniz Cagdas
- Hacettepe University Medical School, Department of Pediatric Immunology; Hacettepe University Medical School, Institute of Child Health, Department of Pediatric Immunology.
| | - Sevil Oskay Halacli
- Hacettepe University Medical School, Institute of Child Health, Department of Pediatric Immunology
| | - Cagman Tan
- Hacettepe University Medical School, Institute of Child Health, Department of Pediatric Immunology
| | - Saliha Esenboğa
- Hacettepe University Medical School, Department of Pediatric Immunology
| | - Betül Karaatmaca
- Hacettepe University Medical School, Department of Pediatric Immunology
| | | | | | - Arzu Ayhan
- Hacettepe University Medical School, Department of Pediatric Pathology
| | - Aysegul Uner
- Hacettepe University Medical School, Department of Pediatric Pathology
| | - Diclehan Orhan
- Hacettepe University Medical School, Department of Pediatric Pathology
| | - Kaan Boztug
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences
| | - Seza Özen
- Hacettepe University Medical School, Department of Pediatric Rheumatology
| | - Rezan Topaloğlu
- Hacettepe University Medical School, Department of Pediatric Nephrology
| | - Ozden Sanal
- Hacettepe University Medical School, Department of Pediatric Immunology; Hacettepe University Medical School, Institute of Child Health, Department of Pediatric Immunology
| | - İlhan Tezcan
- Hacettepe University Medical School, Department of Pediatric Immunology; Hacettepe University Medical School, Institute of Child Health, Department of Pediatric Immunology
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21
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Vignesh P, Rawat A, Kumrah R, Singh A, Gummadi A, Sharma M, Kaur A, Nameirakpam J, Jindal A, Suri D, Gupta A, Khadwal A, Saikia B, Minz RW, Sharma K, Desai M, Taur P, Gowri V, Pandrowala A, Dalvi A, Jodhawat N, Kambli P, Madkaikar MR, Bhattad S, Ramprakash S, Cp R, Jayaram A, Sivasankaran M, Munirathnam D, Balaji S, Rajendran A, Aggarwal A, Singh K, Na F, George B, Mehta A, Lashkari HP, Uppuluri R, Raj R, Bartakke S, Gupta K, Sreedharanunni S, Ogura Y, Kato T, Imai K, Chan KW, Leung D, Ohara O, Nonoyama S, Hershfield M, Lau YL, Singh S. Clinical, Immunological, and Molecular Features of Severe Combined Immune Deficiency: A Multi-Institutional Experience From India. Front Immunol 2021; 11:619146. [PMID: 33628209 PMCID: PMC7897653 DOI: 10.3389/fimmu.2020.619146] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 12/17/2020] [Indexed: 01/04/2023] Open
Abstract
Background Severe Combined Immune Deficiency (SCID) is an inherited defect in lymphocyte development and function that results in life-threatening opportunistic infections in early infancy. Data on SCID from developing countries are scarce. Objective To describe clinical and laboratory features of SCID diagnosed at immunology centers across India. Methods A detailed case proforma in an Excel format was prepared by one of the authors (PV) and was sent to centers in India that care for patients with primary immunodeficiency diseases. We collated clinical, laboratory, and molecular details of patients with clinical profile suggestive of SCID and their outcomes. Twelve (12) centers provided necessary details which were then compiled and analyzed. Diagnosis of SCID/combined immune deficiency (CID) was based on 2018 European Society for Immunodeficiencies working definition for SCID. Results We obtained data on 277 children; 254 were categorized as SCID and 23 as CID. Male-female ratio was 196:81. Median (inter-quartile range) age of onset of clinical symptoms and diagnosis was 2.5 months (1, 5) and 5 months (3.5, 8), respectively. Molecular diagnosis was obtained in 162 patients - IL2RG (36), RAG1 (26), ADA (19), RAG2 (17), JAK3 (15), DCLRE1C (13), IL7RA (9), PNP (3), RFXAP (3), CIITA (2), RFXANK (2), NHEJ1 (2), CD3E (2), CD3D (2), RFX5 (2), ZAP70 (2), STK4 (1), CORO1A (1), STIM1 (1), PRKDC (1), AK2 (1), DOCK2 (1), and SP100 (1). Only 23 children (8.3%) received hematopoietic stem cell transplantation (HSCT). Of these, 11 are doing well post-HSCT. Mortality was recorded in 210 children (75.8%). Conclusion We document an exponential rise in number of cases diagnosed to have SCID over the last 10 years, probably as a result of increasing awareness and improvement in diagnostic facilities at various centers in India. We suspect that these numbers are just the tip of the iceberg. Majority of patients with SCID in India are probably not being recognized and diagnosed at present. Newborn screening for SCID is the need of the hour. Easy access to pediatric HSCT services would ensure that these patients are offered HSCT at an early age.
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Affiliation(s)
- Pandiarajan Vignesh
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Amit Rawat
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Rajni Kumrah
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Ankita Singh
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Anjani Gummadi
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Madhubala Sharma
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Anit Kaur
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Johnson Nameirakpam
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Ankur Jindal
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Deepti Suri
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Anju Gupta
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Alka Khadwal
- Bone Marrow Transplantation Unit, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Biman Saikia
- Department of Immunopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Ranjana Walker Minz
- Department of Immunopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Kaushal Sharma
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Mukesh Desai
- Department of Immunology, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Prasad Taur
- Department of Immunology, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Vijaya Gowri
- Department of Immunology, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Ambreen Pandrowala
- Bone Marrow Transplantation Unit, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Aparna Dalvi
- ICMR-National Institute of Immunohematology, Mumbai, India
| | - Neha Jodhawat
- ICMR-National Institute of Immunohematology, Mumbai, India
| | | | | | - Sagar Bhattad
- Pediatric Immunology and Rheumatology, Aster CMI hospital, Bengaluru, India
| | - Stalin Ramprakash
- Pediatric Hemat-oncology and BMT Unit, Aster CMI Hospital, Bengaluru, India
| | - Raghuram Cp
- Pediatric Hemat-oncology and BMT Unit, Aster CMI Hospital, Bengaluru, India
| | | | | | | | - Sarath Balaji
- Institute of Child Health, Madras Medical College, Chennai, India
| | - Aruna Rajendran
- Institute of Child Health, Madras Medical College, Chennai, India
| | - Amita Aggarwal
- Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Komal Singh
- Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Fouzia Na
- Christian Medical College, Vellore, India
| | | | | | | | | | | | | | - Kirti Gupta
- Department of Histopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Sreejesh Sreedharanunni
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Yumi Ogura
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
| | - Tamaki Kato
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
| | - Kohsuke Imai
- Department of Pediatrics, National Defense Medical College, Saitama, Japan.,Department of Community Pediatrics, Perinatal and Maternal Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Koon Wing Chan
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Daniel Leung
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | | | - Shigeaki Nonoyama
- Department of Pediatrics, National Defense Medical College, Saitama, Japan
| | | | - Yu-Lung Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Surjit Singh
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Al Sukaiti N, Ahmed K, Alshekaili J, Al Kindi M, Cook MC, Farsi TA. A Decade Experience on Severe Combined Immunodeficiency Phenotype in Oman, Bridging to Newborn Screening. Front Immunol 2021; 11:623199. [PMID: 33519828 PMCID: PMC7844122 DOI: 10.3389/fimmu.2020.623199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 12/02/2020] [Indexed: 11/13/2022] Open
Abstract
Introduction Severe combined immunodeficiency (SCID) results from various monogenic defects that impair immune function and brings on early severe and life-threatening infections. The main stay of treatment for SCID is hematopoietic stem cell transplant (HSCT) with near normal survival at 5 years for an early transplant done at or before the age of 3.5 months of life and the patient is maintained free of infections. Although overall rare, it constitutes a major burden on affected children, their families and on the health system especially in communities with a high rate of consanguinity where incidence and prevalence of recessive inborn errors of immunity (IEI) are expected to be high. Method Here, we report the clinical, immunological, and molecular findings in 36 children diagnosed with SCID from a single tertiary center in Oman for the last decade. Results We observed a median annual incidence rate of 4.5 per 100,000 Omani live births, and 91.7% of affected children were born to consanguineous parents. Twenty-three children (63.9%) fulfilled the criteria for typical SCID. The median age at onset, diagnosis and diagnostic delay were 54, 135, and 68 days, respectively. The most common clinical manifestations were pneumonia, septicemia, and chronic diarrhea. Eleven children (30.6%) have received hematopoietic stem cell transplant (HSCT) with a survival rate of 73%. The most frequent genetic cause of SCID in this cohort (n = 36) was (RAG-1), encoding for recombination activating gene (n = 5, 13.9%). Similarly, Major histocompatibility complex type II deficiency accounted for (n = 5, 13.9%) of our cohort. Conclusion Our report broadens the knowledge of clinical and molecular manifestations in children with SCID in the region and highlights the need to initiate newborn based screening program (NBS) program.
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Affiliation(s)
- Nashat Al Sukaiti
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Khwater Ahmed
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
| | - Jalila Alshekaili
- Department of Microbiology and Immunology, Sultan Qaboos University Hospital, Muscat, Oman
| | - Mahmood Al Kindi
- Department of Microbiology and Immunology, Sultan Qaboos University Hospital, Muscat, Oman
| | - Matthew C. Cook
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, NSW, Australia
- Translational Research Unit, Department of Immunology, The Canberra Hospital, Canberra, NSW, Australia
- Centre for Personalized Immunology (NHMRC Centre of Research Excellence), John Curtin School of Medical Research, Australian National University, Canberra, NSW, Australia
| | - Tariq Al Farsi
- Department of Pediatric Allergy and Clinical Immunology, The Royal Hospital, Muscat, Oman
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Severe Combined Immunodeficiency Disorder due to a Novel Mutation in Recombination Activation Gene 2: About 2 Cases. Case Reports Immunol 2021; 2021:8819368. [PMID: 33505738 PMCID: PMC7808801 DOI: 10.1155/2021/8819368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 12/07/2020] [Accepted: 12/26/2020] [Indexed: 11/26/2022] Open
Abstract
Severe combined immunodeficiency (SCID) comprises a heterogeneous group of inherited immunologic disorders with profound defects in cellular and humoral immunity. SCID is the most severe PID and constitutes a pediatric emergency. Affected children are highly susceptible to bacterial, viral, fungal, and opportunistic infections with life-threatening in the absence of hematopoietic stem cell transplantation. We report here two cases of SCID. The first case is a girl diagnosed with SCID at birth based on her family history and lymphocyte subpopulation typing. The second case is a 4-month-old boy with a history of recurrent opportunistic infections, BCGitis, and failure to thrive, and the immunology workup confirms a SCID phenotype. The genetic study in the two cases revealed a novel mutation in the RAG2 gene, c.826G > A (p.Gly276Ser), in a homozygous state. The novel mutation in the RAG2 gene identified in our study may help the early diagnosis of SCID.
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Clinical and Immunological Features of 96 Moroccan Children with SCID Phenotype: Two Decades' Experience. J Clin Immunol 2021; 41:631-638. [PMID: 33411152 DOI: 10.1007/s10875-020-00960-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Accepted: 12/28/2020] [Indexed: 10/22/2022]
Abstract
Severe combined immunodeficiency (SCID) is a heterogeneous group of primary immunodeficiency diseases (PIDs) characterized by a lack of autologous T lymphocytes. This severe PID is rare, but has a higher prevalence in populations with high rates of consanguinity. The epidemiological, clinical, and immunological features of SCIDs in Moroccan patients have never been reported. The aim of this study was to provide a clinical and immunological description of SCID in Morocco and to assess changes in the care of SCID patients over time. This cross-sectional retrospective study included 96 Moroccan patients referred to the national PID reference center at Casablanca Children's Hospital for SCID over two decades, from 1998 to 2019. The case definition for this study was age < 2 years, with a clinical phenotype suggestive of SCID, and lymphopenia, with very low numbers of autologous T cells, according to the IUIS Inborn Errors of Immunity classification. Our sample included 50 male patients, and 66% of the patients were born to consanguineous parents. The median age at onset and diagnosis were 3.3 and 6.5 months, respectively. The clinical manifestations commonly observed in these patients were recurrent respiratory tract infection (82%), chronic diarrhea (69%), oral candidiasis (61%), and failure to thrive (65%). The distribution of SCID phenotypes was as follows: T-B-NK+ in 44.5%, T-B-NK- in 32%, T-B+NK- in 18.5%, and T-B+NK+ in 5%. An Omenn syndrome phenotype was observed in 15 patients. SCID was fatal in 84% in the patients in our cohort, due to the difficulties involved in obtaining urgent access to hematopoietic stem cell transplantation, which, nevertheless, saved 16% of the patients. The autosomal recessive forms of the clinical and immunological phenotypes of SCID, including the T-B-NK+ phenotype in particular, were more frequent than those in Western countries. A marked improvement in the early detection of SCID cases over the last decade was noted. Despite recent progress in SCID diagnosis, additional efforts are required, for genetic confirmation and particularly for HSCT.
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Translating Molecular Technologies into Routine Newborn Screening Practice. Int J Neonatal Screen 2020; 6:ijns6040080. [PMID: 33124618 PMCID: PMC7712315 DOI: 10.3390/ijns6040080] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/12/2020] [Accepted: 10/14/2020] [Indexed: 01/20/2023] Open
Abstract
As biotechnologies advance and better treatment regimens emerge, there is a trend toward applying more advanced technologies and adding more conditions to the newborn screening (NBS) panel. In the current Recommended Uniform Screening Panel (RUSP), all conditions but one, congenital hypothyroidism, have well-defined genes and inheritance patterns, so it is beneficial to incorporate molecular testing in NBS when it is necessary and appropriate. Indeed, the applications of molecular technologies have taken NBS to previously uncharted territory. In this paper, based on our own program experience and what has been reported in the literature, we describe current practices regarding the applications of molecular technologies in routine NBS practice in the era of genomic and precision medicine.
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Chinn IK, Orange JS. A 2020 update on the use of genetic testing for patients with primary immunodeficiency. Expert Rev Clin Immunol 2020; 16:897-909. [DOI: 10.1080/1744666x.2020.1814145] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ivan K. Chinn
- Department of Pediatrics, Section of Immunology, Allergy, and Retrovirology, Baylor College of Medicine, Houston, TX, USA
- Center for Human Immunobiology, Texas Children’s Hospital, Houston, TX, USA
| | - Jordan S. Orange
- Department of Pediatrics, Columbia University College of Physicians and Surgeons, New York, NY, USA
- NewYork-Presbyterian Morgan Stanley Children's Hospita, New York, USA
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Shinwari K, Bolkov M, Tuzankina IA, Chereshnev VA. Newborn Screening through TREC, TREC/KREC System for Primary Immunodeficiency with limitation of TREC/KREC. Comprehensive Review. Antiinflamm Antiallergy Agents Med Chem 2020; 20:132-149. [PMID: 32748762 DOI: 10.2174/1871523019999200730171600] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 06/11/2020] [Accepted: 06/21/2020] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Newborn screening (NBS) by quantifying T cell receptor excision circles (TRECs) and Kappa receptor excision circles in neonatal dried blood spots (DBS) enables early diagnosis of different types of primary immune deficiencies. Global newborn screening for PID, using an assay to detect T-cell receptor excision circles (TREC) in dried blood spots (DBS), is now being performed in all states in the United States. In this review, we discuss the development and outcomes of TREC, TREC/KREC combines screening, and continued challenges to implementation. OBJECTIVE To review the diagnostic performance of published articles for TREC and TREC/ KREC based NBS for PID and its different types. METHODS Different research resources were used to get an approach for the published data of TREС and KREC based NBS for PID like PubMed, Scopus, Google Scholar, Research gate EMBASE. We extracted TREC and KREC screening Publisher with years of publication, content and cut-off values, and a number of retests, repeat DBS, and referrals from the different published pilot, pilot cohort, Case series, and cohort studies. RESULTS We included the results of TREC, combined TREC/KREC system based NBS screening from different research articles, and divided these results between the Pilot studies, case series, and cohort. For each of these studies, different parameter data are excluded from different articles. Thirteen studies were included, re-confirming 89 known SCID cases in case series and reporting 53 new SCID cases in 3.15 million newborns. Individual TREC contents in all SCID patients were <25 TRECs/μl (except in those evaluated with the New York State assay). CONCLUSION TREC and KREC sensitivity for typical SCID and other types of PID was 100 %. It shows its importance and anticipating the significance of implementation in different undeveloped and developed countries in the NBS program in upcoming years. Data adapting the screening algorithm for pre-term/ill infants reduce the amount of false-positive test results.
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Affiliation(s)
- Khyber Shinwari
- Department of Immunochemistry, Institute of Chemical Engineering, Ural Federal University, Yekaterinburg, Russian Federation
| | - Mikhail Bolkov
- Department of Immunochemistry, Institute of Chemical Engineering, Ural Federal University, Yekaterinburg, Russian Federation
| | - Irina A Tuzankina
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation
| | - Valery A Chereshnev
- Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation
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Nonsevere combined immunodeficiency T-cell lymphopenia identified through newborn screening. Curr Opin Allergy Clin Immunol 2020; 19:586-593. [PMID: 31490207 DOI: 10.1097/aci.0000000000000586] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE OF REVIEW Although severe combined immunodeficiency (SCID) is the primary target condition for newborn screening (NBS), over 25 secondary targets, conditions other than SCID, have been identified. There is no standard method for evaluating neonates with non-SCID T-cell lymphopenia (TCL) and no standard approaches to treatment. We will describe these conditions and discuss recommendations for evaluating and follow-up of non-SCID TCL detected by NBS. RECENT FINDINGS The birth prevalence of non-SCID TCL detected through SCID NBS is higher than SCID and can be a burden on NBS programs. We will present some publications discussing outcomes and comorbidities in these patients. SUMMARY NBS for SCID has been very successful in identifying infants with SCID at birth to institute early life saving therapies. TCL due to other conditions can cause significant immune deficiency and treatment is dependent on the cause of the defect, as well as the magnitude of the immunodeficiency. Data collection from NBS programs should include assessment of various therapies and clinical outcomes. Better systems for recording long-term outcomes of SCID NBS including both SCID and non-SCID conditions should become a priority for NBS programs. This will help to advance the goal of NBS programs: improve outcomes in the most cost-effective manner.
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Dasouki M, Jabr A, AlDakheel G, Elbadaoui F, Alazami AM, Al-Saud B, Arnaout R, Aldhekri H, Alotaibi I, Al-Mousa H, Hawwari A. TREC and KREC profiling as a representative of thymus and bone marrow output in patients with various inborn errors of immunity. Clin Exp Immunol 2020; 202:60-71. [PMID: 32691468 DOI: 10.1111/cei.13484] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 06/11/2020] [Accepted: 06/14/2020] [Indexed: 12/13/2022] Open
Abstract
Primary immune deficiency (PID) disorders are clinically and molecularly heterogeneous diseases. T cell receptor excision circles (TRECs) and κ (kappa)-deleting excision circles (KRECs) are markers of T and B cell development, respectively. They are useful tools to assess T and B cell function and immune reconstitution and have been used for newborn screening for severe combined immunodeficiency disease (SCID) and agammaglobulinemia, respectively. Their profiles in several genetically confirmed PIDs are still lacking. The objective of this study was to determine TREC and KREC genomic profiling among various molecularly confirmed PIDs. We used real-time-quantitative polymerase chain reaction (RT-qPCR)-based triplex analysis of TRECs, KRECs and β-actin (ACTB) in whole blood genomic DNA isolated from 108 patients with molecularly confirmed PIDs. All agammaglobulinemia patients had low KREC counts. All SCIDs and Omenn syndrome patients secondary to mutations in RAG1, RAG2, DCLRE1C and NHEJ1 had low TREC and KREC counts. JAK3-deficient patients had normal KREC and the TREC count was influenced by the type of mutation. Early-onset ADA patients had low TREC and KREC counts. Four patients with zeta-chain-associated protein kinase 70 (ZAP70) had low TREC. All purine nucleoside phosphorylase (PNP) patients had low TREC. Combined immunodeficiency (CID) patients secondary to AK2, PTPRC, CD247, DCLREC1 and STAT1 had normal TREC and KREC counts. Most patients with ataxia-telangiectasia (AT) patients had low TREC and KREC, while most DOCK8-deficient patients had low TRECs only. Two of five patients with Wiskott-Aldrich syndrome (WAS) had low TREC counts as well as one patient each with bare lymphocyte syndrome (BLS) and chronic granulomatous disease. All patients with Griscelli disease, Chediak-Higashi syndrome, hyper-immunoglobulin (Ig)M syndrome and IFNGR2 had normal TREC and KREC counts. These data suggest that, in addition to classical SCID and agammaglobulinemia, TREC/KREC assay may identify ZAP70 patients and secondary target PIDs, including dedicator of cytokinesis 8 (DOCK8) deficiency, AT and some individuals with WAS and BLS.
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Affiliation(s)
- M Dasouki
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - A Jabr
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - G AlDakheel
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - F Elbadaoui
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - A M Alazami
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - B Al-Saud
- Department of Pediatrics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - R Arnaout
- Department of Pediatrics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - H Aldhekri
- Department of Pediatrics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - I Alotaibi
- Department of Pediatrics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - H Al-Mousa
- Department of Pediatrics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.,College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - A Hawwari
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.,King Abdullah International Medical Research Center (KAIMRC), King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City Hospital, Ministry of National Guard Health Affairs, Al-Ahsa, Saudi Arabia
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30
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Parad RB, Kaler SG, Mauceli E, Sokolsky T, Yi L, Bhattacharjee A. Targeted next generation sequencing for newborn screening of Menkes disease. Mol Genet Metab Rep 2020; 24:100625. [PMID: 32714836 PMCID: PMC7378272 DOI: 10.1016/j.ymgmr.2020.100625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/18/2020] [Indexed: 11/17/2022] Open
Abstract
Purpose Population-based newborn screening (NBS) allows early detection and treatment of inherited disorders. For certain medically-actionable conditions, however, NBS is limited by the absence of reliable biochemical signatures amenable to detection by current platforms. We sought to assess the analytic validity of an ATP7A targeted next generation DNA sequencing assay as a potential newborn screen for one such disorder, Menkes disease. Methods Dried blood spots from control or Menkes disease subjects (n = 22) were blindly analyzed for pathogenic variants in the copper transport gene, ATP7A. The analytical method was optimized to minimize cost and provide rapid turnaround time. Results The algorithm correctly identified pathogenic ATP7A variants, including missense, nonsense, small insertions/deletions, and large copy number variants, in 21/22 (95.5%) of subjects, one of whom had inconclusive diagnostic sequencing previously. For one false negative that also had not been detected by commercial molecular laboratories, we identified a deep intronic variant that impaired ATP7A mRNA splicing. Conclusions Our results support proof-of-concept that primary DNA-based NBS would accurately detect Menkes disease, a disorder that fulfills Wilson and Jungner screening criteria and for which biochemical NBS is unavailable. Targeted next generation sequencing for NBS would enable improved Menkes disease clinical outcomes, establish a platform for early identification of other unscreened disorders, and complement current NBS by providing immediate data for molecular confirmation of numerous biochemically screened condition.
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Affiliation(s)
- Richard B Parad
- Department of Pediatric Newborn Medicine, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, United States of America
| | - Stephen G Kaler
- Section on Translational Neuroscience, Molecular Medicine Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, United States of America.,Center for Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH, United States of America
| | - Evan Mauceli
- Parabase Genomics, Inc., Boston, MA, United States of America
| | - Tanya Sokolsky
- Parabase Genomics, Inc., Boston, MA, United States of America.,Baebies, Inc., Durham, NC, United States of America
| | - Ling Yi
- Section on Translational Neuroscience, Molecular Medicine Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, United States of America
| | - Arindam Bhattacharjee
- Parabase Genomics, Inc., Boston, MA, United States of America.,Baebies, Inc., Durham, NC, United States of America
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31
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Kwok JSY, Cheung SKF, Ho JCY, Tang IWH, Chu PWK, Leung EYS, Lee PPW, Cheuk DKL, Lee V, Ip P, Lau YL. Establishing Simultaneous T Cell Receptor Excision Circles (TREC) and K-Deleting Recombination Excision Circles (KREC) Quantification Assays and Laboratory Reference Intervals in Healthy Individuals of Different Age Groups in Hong Kong. Front Immunol 2020; 11:1411. [PMID: 32765500 PMCID: PMC7378446 DOI: 10.3389/fimmu.2020.01411] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 06/02/2020] [Indexed: 01/10/2023] Open
Abstract
The clinical experience gathered throughout the years has raised awareness of primary immunodeficiency diseases (PIDD). T cell receptor excision circles (TREC) and kappa-deleting recombination excision circles (KREC) assays for thymic and bone marrow outputs measurement have been widely implemented in newborn screening (NBS) programs for Severe Combined Immunodeficiency. The potential applications of combined TREC and KREC assay in PIDD diagnosis and immune reconstitution monitoring in non-neonatal patients have been suggested. Given that ethnicity, gender, and age can contribute to variations in immunity, defining the reference intervals of TREC and KREC levels in the local population is crucial for setting up cut-offs for PIDD diagnosis. In this retrospective study, 479 healthy Chinese sibling donors (240 males and 239 females; age range: 1 month-74 years) from Hong Kong were tested for TREC and KREC levels using a simultaneous quantitative real-time PCR assay. Age-specific 5th-95th percentile reference intervals of TREC and KREC levels (expressed in copies per μL blood and copies per 106 cells) were established in both pediatric and adult age groups. Significant inverse correlations between age and both TREC and KREC levels were observed in the pediatric age group. A significant higher KREC level was observed in females than males after 9-12 years of age but not for TREC. Low TREC or KREC levels were detected in patients diagnosed with mild or severe PIDD. This assay with the established local reference intervals would allow accurate diagnosis of PIDD, and potentially monitoring immune reconstitution following haematopoietic stem cell transplantation or highly active anti-retroviral therapy in the future.
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Affiliation(s)
- Janette S. Y. Kwok
- Division of Transplantation and Immunogenetics, Department of Pathology, Queen Mary Hospital, Hong Kong, Hong Kong
| | - Stephen K. F. Cheung
- Division of Transplantation and Immunogenetics, Department of Pathology, Queen Mary Hospital, Hong Kong, Hong Kong
| | - Jenny C. Y. Ho
- Division of Transplantation and Immunogenetics, Department of Pathology, Queen Mary Hospital, Hong Kong, Hong Kong
| | - Ivan W. H. Tang
- Division of Transplantation and Immunogenetics, Department of Pathology, Queen Mary Hospital, Hong Kong, Hong Kong
| | - Patrick W. K. Chu
- Division of Transplantation and Immunogenetics, Department of Pathology, Queen Mary Hospital, Hong Kong, Hong Kong
| | - Eric Y. S. Leung
- Division of Transplantation and Immunogenetics, Department of Pathology, Queen Mary Hospital, Hong Kong, Hong Kong
| | - Pamela P. W. Lee
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Daniel K. L. Cheuk
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Vincent Lee
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Patrick Ip
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
| | - Y. L. Lau
- Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong, Hong Kong
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32
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Strand J, Gul KA, Erichsen HC, Lundman E, Berge MC, Trømborg AK, Sørgjerd LK, Ytre-Arne M, Hogner S, Halsne R, Gaup HJ, Osnes LT, Kro GAB, Sorte HS, Mørkrid L, Rowe AD, Tangeraas T, Jørgensen JV, Alme C, Bjørndalen TEH, Rønnestad AE, Lang AM, Rootwelt T, Buechner J, Øverland T, Abrahamsen TG, Pettersen RD, Stray-Pedersen A. Second-Tier Next Generation Sequencing Integrated in Nationwide Newborn Screening Provides Rapid Molecular Diagnostics of Severe Combined Immunodeficiency. Front Immunol 2020; 11:1417. [PMID: 32754152 PMCID: PMC7381310 DOI: 10.3389/fimmu.2020.01417] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/02/2020] [Indexed: 12/15/2022] Open
Abstract
Severe combined immunodeficiency (SCID) and other T cell lymphopenias can be detected during newborn screening (NBS) by measuring T cell receptor excision circles (TRECs) in dried blood spot (DBS) DNA. Second tier next generation sequencing (NGS) with an amplicon based targeted gene panel using the same DBS DNA was introduced as part of our prospective pilot research project in 2015. With written parental consent, 21 000 newborns were TREC-tested in the pilot. Three newborns were identified with SCID, and disease-causing variants in IL2RG, RAG2, and RMRP were confirmed by NGS on the initial DBS DNA. The molecular findings directed follow-up and therapy: the IL2RG-SCID underwent early hematopoietic stem cell transplantation (HSCT) without any complications; the leaky RAG2-SCID received prophylactic antibiotics, antifungals, and immunoglobulin infusions, and underwent HSCT at 1 year of age. The child with RMRP-SCID had complete Hirschsprung disease and died at 1 month of age. Since January 2018, all newborns in Norway have been offered NBS for SCID using 1st tier TRECs and 2nd tier gene panel NGS on DBS DNA. During the first 20 months of nationwide SCID screening an additional 88 000 newborns were TREC tested, and four new SCID cases were identified. Disease-causing variants in DCLRE1C, JAK3, NBN, and IL2RG were molecularly confirmed on day 8, 15, 8 and 6, respectively after birth, using the initial NBS blood spot. Targeted gene panel NGS integrated into the NBS algorithm rapidly delineated the specific molecular diagnoses and provided information useful for management, targeted therapy and follow-up i.e., X rays and CT scans were avoided in the radiosensitive SCID. Second tier targeted NGS on the same DBS DNA as the TREC test provided instant confirmation or exclusion of SCID, and made it possible to use a less stringent TREC cut-off value. This allowed for the detection of leaky SCIDs, and simultaneously reduced the number of control samples, recalls and false positives. Mothers were instructed to stop breastfeeding until maternal cytomegalovirus (CMV) status was determined. Our limited data suggest that shorter time-interval from birth to intervention, may prevent breast milk transmitted CMV infection in classical SCID.
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Affiliation(s)
- Janne Strand
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Kiran Aftab Gul
- Paediatric Research Institute, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Hans Christian Erichsen
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
- Division of Paediatric and Adolescent Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Emma Lundman
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Mona C. Berge
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Anette K. Trømborg
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Linda K. Sørgjerd
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Mari Ytre-Arne
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Silje Hogner
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Ruth Halsne
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
- Department of Forensic Biology, Oslo University Hospital, Oslo, Norway
| | - Hege Junita Gaup
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Liv T. Osnes
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway
| | - Grete A. B. Kro
- Department of Microbiology, Oslo University Hospital, Oslo, Norway
| | - Hanne S. Sorte
- Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | - Lars Mørkrid
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
| | - Alexander D. Rowe
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Trine Tangeraas
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Jens V. Jørgensen
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Charlotte Alme
- Department of Paediatric Haematology, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | | | - Arild E. Rønnestad
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Astri M. Lang
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Terje Rootwelt
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
- Division of Paediatric and Adolescent Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Jochen Buechner
- Department of Paediatric Haematology, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Torstein Øverland
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Tore G. Abrahamsen
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
- Division of Paediatric and Adolescent Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Rolf D. Pettersen
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Asbjørg Stray-Pedersen
- Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
- Department of Paediatrics, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
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Bidla G, Watkins D, Chéry C, Froese DS, Ells C, Kerachian M, Saskin A, Christensen KE, Gilfix BM, Guéant JL, Rosenblatt DS. Biochemical analysis of patients with mutations in MTHFD1 and a diagnosis of methylenetetrahydrofolate dehydrogenase 1 deficiency. Mol Genet Metab 2020; 130:179-182. [PMID: 32414565 DOI: 10.1016/j.ymgme.2020.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 10/24/2022]
Abstract
MTHFD1 is a trifunctional protein containing 10-formyltetrahydrofolate synthetase, 5,10-methenyltetrahydrofolate cyclohydrolase and 5,10-methylenetetrahydrofolate dehydrogenase activities. It is encoded by MTHFD1 and functions in the cytoplasmic folate cycle where it is involved in de novo purine synthesis, synthesis of thymidylate and remethylation of homocysteine to methionine. Since the first reported case of severe combined immunodeficiency resulting from MTHFD1 mutations, seven additional patients ascertained through molecular analysis have been reported with variable phenotypes, including megaloblastic anemia, atypical hemolytic uremic syndrome, hyperhomocysteinemia, microangiopathy, infections and autoimmune diseases. We determined the level of MTHFD1 expression and dehydrogenase specific activity in cell extracts from cultured fibroblasts of three previously reported patients, as well as a patient with megaloblastic anemia and recurrent infections with compound heterozygous MTHFD1 variants that were predicted to be deleterious. MTHFD1 protein expression determined by Western blotting in fibroblast extracts from three of the patients was markedly decreased compared to expression in wild type cells (between 4.8 and 14.3% of mean control values). MTHFD1 expression in the fourth patient was approximately 44% of mean control values. There was no detectable methylenetetrahydrofolate dehydrogenase specific activity in extracts from any of the four patients. This is the first measurement of MTHFD1 function in MTHFD1 deficient patients and confirms the previous molecular diagnoses.
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Affiliation(s)
- Gawa Bidla
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - David Watkins
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.; Division of Medical Genetics, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada.; Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada..
| | - Céline Chéry
- Inserm-U954, National reference centre for inherited metabolic diseases, University Hospital Centre, Nancy, France
| | - D Sean Froese
- Division of Metabolism and Children's Research Center, University Children's Hospital, Steinwiesstrasse 75, CH-8032 Zürich, Switzerland
| | - Courtney Ells
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Matin Kerachian
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Avi Saskin
- Division of Medical Genetics, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Karen E Christensen
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.; Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Brian M Gilfix
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.; Division of Medical Biochemistry, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada
| | - Jean-Louis Guéant
- Inserm-U954, National reference centre for inherited metabolic diseases, University Hospital Centre, Nancy, France
| | - David S Rosenblatt
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.; Division of Medical Genetics, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada.; Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.; Division of Medical Biochemistry, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada
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Watkins D, Rosenblatt DS. Immunodeficiency and inborn disorders of vitamin B12 and folate metabolism. Curr Opin Clin Nutr Metab Care 2020; 23:241-246. [PMID: 32412981 DOI: 10.1097/mco.0000000000000668] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
PURPOSE OF REVIEW Immune dysfunction, including severe combined immunodeficiency, has been described in genetic disorders affecting the metabolism of the vitamins cobalamin (vitamin B12) and folate. We have reviewed reports of clinical findings in patients with a number of inborn errors of cobalamin or folate metabolism, specifically looking for immune problems. RECENT FINDINGS There is little evidence that immune function is affected in most of the disorders. Exceptions are Imerslund-Gräsbeck syndrome and hereditary folate malabsorption (affecting intestinal absorption of cobalamin and folate, respectively), transcobalamin deficiency (affecting transport of cobalamin in blood and cellular cobalamin uptake), and methylenetetrahydrofolate dehydrogenase 1 deficiency (catalyzing cytoplasmic interconversion of reduced folate coenzyme derivatives). SUMMARY Although some inborn errors of cobalamin or folate can be associated with immune dysfunction, the degree and type of immune dysfunction vary with no obvious pattern.
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Affiliation(s)
- David Watkins
- Department of Human Genetics, McGill University
- Department of Specialized Medicine, Division of Medical Genetics, McGill University Health Centre
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - David S Rosenblatt
- Department of Human Genetics, McGill University
- Department of Specialized Medicine, Division of Medical Genetics, McGill University Health Centre
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
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Abstract
The misuse of sport-related gene transfer methods in elite athletes is a real and growing concern. The success of gene therapy in the treatment of hereditary diseases has been most evident since targets in gene therapy products can be used in healthy individuals to improve sports performance. Performing these practices threatens the sporting character of competitions and may pose potential health hazards. Since the World Anti-Doping Agency pronouncement on the prohibition of such practices in 2003, several researchers have been trying to address the challenge of developing an effective method for the detection of genetic doping. This review presents an overview of the published methods developed for this purpose, the advantages and limitations of technologies and the putative target genes. At last, we present the perspective related to the application of the detection methods in the doping control field.
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El-Sayed ZA, Radwan N. Newborn Screening for Primary Immunodeficiencies: The Gaps, Challenges, and Outlook for Developing Countries. Front Immunol 2020; 10:2987. [PMID: 32082296 PMCID: PMC7002357 DOI: 10.3389/fimmu.2019.02987] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 12/05/2019] [Indexed: 01/04/2023] Open
Abstract
Primary immunodeficiency diseases (PIDs) are genetically inherited diseases characterized by an increased susceptibility to infections, autoimmunity, lymphoproliferation, and malignancies. PIDs are under-diagnosed and the registered cases and reported prevalence are far below the estimated numbers especially in countries with large population and high consanguinity rates. Delays in diagnosis yield major morbidities and mortalities with resultant increased economic burden. Newborn screening using TRECs and KRECs, currently being implemented in some countries, is aimed through early diagnosis, to overcome the delays in the diagnosis and hence the poor outcome of some of the severe PIDs. However, the limited resources in developing countries challenges the implementation of newborn PID screening programs. There are considerable gaps in our knowledge that must be bridged. Setting the norms of TRECs and KRECs for each country is needed. Furthermore, some PIDs that might present in the neonatal period could not be detected by the current screening programs, and their diagnosis requires clinical expertise. Not to mention, local guidelines for the management of patients diagnosed by NBS should be set forth. Also, in the absence of NBS, clinicians should be aware of the early manifestations of PID. All these mandate conducting studies genuine to each country, developing programs for raising public awareness and clinical training of physicians to attain the required immunological skills.
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Affiliation(s)
- Zeinab A El-Sayed
- Pediatric Allergy and Immunology Unit, Children's Hospital, Ain Shams University, Cairo, Egypt
| | - Nesrine Radwan
- Pediatric Allergy and Immunology Unit, Children's Hospital, Ain Shams University, Cairo, Egypt
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Global perspectives on primary immune deficiency diseases. STIEHM'S IMMUNE DEFICIENCIES 2020. [PMCID: PMC7258797 DOI: 10.1016/b978-0-12-816768-7.00054-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Cagdas D, Halaçlı SO, Tan Ç, Lo B, Çetinkaya PG, Esenboğa S, Karaatmaca B, Matthews H, Balcı-Hayta B, Arıkoğlu T, Ezgü F, Aladağ E, Saltık-Temizel İN, Demir H, Kuşkonmaz B, Okur V, Gümrük F, Göker H, Çetinkaya D, Boztuğ K, Lenardo M, Sanal Ö, Tezcan İ. A Spectrum of Clinical Findings from ALPS to CVID: Several Novel LRBA Defects. J Clin Immunol 2019; 39:726-738. [PMID: 31432443 PMCID: PMC11090043 DOI: 10.1007/s10875-019-00677-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 07/25/2019] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Autosomal recessively inherited lipopolysaccharide-responsive beige-like anchor (LRBA) protein deficiency was shown to be responsible for different types of inborn errors of immunity, such as common variable immunodeficiency (CVID) and autoimmune lymphoproliferative syndrome (ALPS). The aim of this study was to compare patients with LRBA-related ALPS and LRBA-related CVID, to describe their clinical and laboratory phenotypes, and to prepare an algorithm for their diagnosis and management. METHODS Fifteen LRBA-deficient patients were identified among 31 CVID and 14 possible ALPS patients with Western blotting (WB), primary immunodeficiency disease (PIDD) gene, next-generation panel screening (NGS), and whole exome sequencing (WES). RESULTS The median age on admission and age of diagnosis were 7 years (0.3-16.5) and 11 years (5-44), respectively. Splenomegaly was seen in 93.3% (14/15) of the patients on admission. Splenectomy was performed to 1/5. Recurrent upper respiratory tract infections (93.3% (14/15)), autoimmune cytopenia (80% (12/15)), chronic diarrhea (53.3% (8/15)), lower respiratory tract infections (53.3% (8/15)), lymphoma (26.6% (4/15)), Evans syndrome (26.6% (4/15)), and autoimmune thyroiditis (20% (3/15)) were common clinical findings and diseases. Lymphopenia (5/15), intermittant neutropenia (4/15), eosinophilia (4/15), and progressive hypogammaglobulinemia are recorded in given number of patients. Double negative T cells (TCRαβ+CD4-CD8-) were increased in 80% (8/10) of the patients. B cell percentage/numbers were low in 60% (9/15) of the patients on admission. Decreased switched memory B cells, decreased naive and recent thymic emigrant (RTE) Thelper (Th) cells, markedly increased effector memory/effector memory RA+ (TEMRA) Th were documented. Large PD1+ population, increased memory, and enlarged follicular helper T cell population in the CD4+ T cell compartment was seen in one of the patients. Most of the deleterious missense mutations were located in the DUF1088 and BEACH domains. Interestingly, one of the two siblings with the same homozygous LRBA defect did not have any clinical symptom. Hematopoietic stem cell transplantation (HSCT) was performed to 7/15 (46.6%) of the patients. Transplanted patients are alive and well after a median of 2 years (1-3). In total, one patient died from sepsis during adulthood before HSCT. CONCLUSION Patients with LRBA deficiency may initially be diagnosed as CVID or ALPS in the clinical practice. Progressive decrease in B cells as well as IgG in ALPS-like patients and addition of IBD symptoms in the follow-up should raise the suspicion for LRBA deficiency. Decreased switched memory B cells, decreased naive and recent thymic emigrant (RTE) Th cells, and markedly increased effector memory/effector memory RA+ Th cells (TEMRA Th) cells are important for the diagnosis of the patients in addition to clinical features. Analysis of protein by either WB or flow cytometry is required when the clinicians come across especially with missense LRBA variants of uncertain significance. High rate of malignancy shows the regulatory T cell's important role of immune surveillance. HSCT is curative and succesful in patients with HLA-matched family donor.
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Affiliation(s)
- Deniz Cagdas
- Department of Pediatrics, Division of Pediatric Immunology, Hacettepe University Medical School, Ankara, Turkey.
| | | | - Çağman Tan
- Institute of Child Health, Immunology, Hacettepe University, Ankara, Turkey
| | - Bernice Lo
- Sidra Medical and Research Center, Al Rayyan, Qatar
| | - Pınar Gür Çetinkaya
- Department of Pediatrics, Division of Pediatric Immunology, Hacettepe University Medical School, Ankara, Turkey
| | - Saliha Esenboğa
- Department of Pediatrics, Division of Pediatric Immunology, Hacettepe University Medical School, Ankara, Turkey
| | - Betül Karaatmaca
- Department of Pediatrics, Division of Pediatric Immunology, Hacettepe University Medical School, Ankara, Turkey
| | - Helen Matthews
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Burcu Balcı-Hayta
- Department of Medical Biology, Hacettepe University Medical School, Ankara, Turkey
| | - Tuba Arıkoğlu
- Department of Pediatrics, Division of Allergy and Immunology, Mersin University Medical School, Mersin, Turkey
| | - Fatih Ezgü
- Department of Pediatrics, Division of Pediatric Inborn Metabolic Disorders, Metabolism and Genetics, Gazi University Medical School, Ankara, Turkey
| | - Elifcan Aladağ
- Department of Internal Medicine, Division of Hematology, Hacettepe University Medical School, Ankara, Turkey
| | - İnci N Saltık-Temizel
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hacettepe University Medical School, Ankara, Turkey
| | - Hülya Demir
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hacettepe University Medical School, Ankara, Turkey
| | - Barış Kuşkonmaz
- Department of Pediatrics, Division of Pediatric Hematology, Hacettepe University Medical School, Ankara, Turkey
| | - Visal Okur
- Department of Pediatrics, Division of Pediatric Hematology, Hacettepe University Medical School, Ankara, Turkey
| | - Fatma Gümrük
- Department of Pediatrics, Division of Pediatric Hematology, Hacettepe University Medical School, Ankara, Turkey
| | - Hakan Göker
- Department of Internal Medicine, Division of Hematology, Hacettepe University Medical School, Ankara, Turkey
| | - Duygu Çetinkaya
- Department of Pediatrics, Division of Pediatric Hematology, Hacettepe University Medical School, Ankara, Turkey
| | - Kaan Boztuğ
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Michael Lenardo
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Özden Sanal
- Department of Pediatrics, Division of Pediatric Immunology, Hacettepe University Medical School, Ankara, Turkey
| | - İlhan Tezcan
- Department of Pediatrics, Division of Pediatric Immunology, Hacettepe University Medical School, Ankara, Turkey
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van der Burg M, Mahlaoui N, Gaspar HB, Pai SY. Universal Newborn Screening for Severe Combined Immunodeficiency (SCID). Front Pediatr 2019; 7:373. [PMID: 31620409 PMCID: PMC6759820 DOI: 10.3389/fped.2019.00373] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 08/30/2019] [Indexed: 11/22/2022] Open
Abstract
Patients with severe combined immunodeficiency (SCID) are born with profound deficiency of functional T-lymphocytes. Early detection and diagnosis would allow for prompt institution of isolation from infection and referral for definitive treatment with allogeneic hematopoietic stem cell transplantation. Universal newborn screening for SCID, using an assay to detect T-cell receptor excision circles (TREC) in dried blood spots (DBS), is now being performed in all states in the United States. In this review, we discuss the development and outcomes of TREC screening, and continued challenges to implementation.
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Affiliation(s)
- Mirjam van der Burg
- Laboratory for Immunology, Department of Pediatrics, Leiden University Medical Center, Leiden, Netherlands
| | - Nizar Mahlaoui
- Centre de Référence Déficits Immunitaires Héréditaires, Hôpital Universitaire Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Hubert Bobby Gaspar
- Molecular and Cellular Immunology, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Sung-Yun Pai
- Division of Hematology-Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, MA, United States
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, United States
- Department of Pediatrics, Harvard Medical School, Boston, MA, United States
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Özen S, Batu ED, Taşkıran EZ, Özkara HA, Ünal Ş, Güleray N, Erden A, Karadağ Ö, Gümrük F, Çetin M, Sönmez HE, Bilginer Y, Ayvaz DÇ, Tezcan I. A Monogenic Disease with a Variety of Phenotypes: Deficiency of Adenosine Deaminase 2. J Rheumatol 2019; 47:117-125. [PMID: 31043544 DOI: 10.3899/jrheum.181384] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2019] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Deficiency of adenosine deaminase 2 (DADA2) is an autosomal recessive autoinflammatory disorder associated with ADA2 mutations. We aimed to investigate the characteristics and ADA2 enzyme activities of patients with DADA2 compared to non-DADA2 patients. METHODS This is a descriptive study of 24 patients with DADA2 who were admitted to the Adult and Pediatric Rheumatology, Pediatric Haematology, and Pediatric Immunology Departments of Hacettepe University. All ADA2 exons were screened by Sanger sequencing. Serum ADA2 enzyme activity was measured by modified spectrophotometric method. RESULTS Twenty-four patients with DADA2 were included: 14 with polyarteritis nodosa (PAN)-like phenotype (Group 1); 9 with Diamond-Blackfan anemia (DBA)-like features, and 1 with immunodeficiency (Group 2). Fourteen PAN-like DADA2 patients did not have the typical thrombocytosis seen in classic PAN. Inflammatory attacks were evident only in Group 1 patients. Serum ADA2 activity was low in all patients with DADA2 except one, who was tested after hematopoietic stem cell transplantation. There was no significant difference in ADA2 activities between PAN-like and DBA-like patients. In DADA2 patients with one ADA2 mutation, serum ADA2 activities were as low as those of patients with homozygote DADA2. ADA2 activities were normal in non-DADA2 patients. ADA2 mutations were affecting the dimerization domain in Group 1 patients and the catalytic domain in Group 2 patients. CONCLUSION We suggest assessing ADA2 activity along with genetic analysis because there are patients with one ADA2 mutation and absent enzyme activity. Our data suggest a possible genotype-phenotype correlation in which dimerization domain mutations are associated with PAN-like phenotype, and catalytic domain mutations are associated with hematological manifestations.
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Affiliation(s)
- Seza Özen
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey. .,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study.
| | - Ezgi Deniz Batu
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Ekim Z Taşkıran
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Hatice Asuman Özkara
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Şule Ünal
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Naz Güleray
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Abdulsamet Erden
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Ömer Karadağ
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Fatma Gümrük
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Mualla Çetin
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Hafize Emine Sönmez
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Yelda Bilginer
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Deniz Çağdaş Ayvaz
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
| | - Ilhan Tezcan
- From the Division of Rheumatology, Department of Pediatrics, Division of Immunology, Department of Internal Medicine, Department of Medical Genetics, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes, Ankara, Turkey.,S. Özen, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; Y. Bilginer, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.D. Batu, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; E.Z. Taşkıran, PhD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; H.A. Özkara, MD, PhD, Department of Medical Biochemistry, Hacettepe University Faculty of Medicine; Ş. Ünal, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; N. Güleray, MD, Department of Medical Genetics, Hacettepe University Faculty of Medicine; A. Erden, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; Ö. Karadağ, MD, Division of Rheumatology, Department of Internal Medicine, Hacettepe University Faculty of Medicine; F. Gümrük, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes; M. Çetin, MD, Hacettepe University Center for Fanconi Anemia and Other Inherited Bone Marrow Failure Syndromes (retired); H.E. Sönmez, MD, Division of Rheumatology, Department of Pediatrics, Hacettepe University Faculty of Medicine; D.Ç. Ayvaz, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine; I. Tezcan, MD, Division of Immunology, Department of Pediatrics, Hacettepe University Faculty of Medicine. E.D. Batu and E.Z. Taşkıran contributed equally to this study
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Now Is the Time to Use Molecular Gene Testing for the Diagnosis of Primary Immune Deficiencies. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2019; 7:833-838. [PMID: 30639929 DOI: 10.1016/j.jaip.2018.12.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/26/2018] [Accepted: 12/26/2018] [Indexed: 12/11/2022]
Abstract
The discovery of chromosomes, genes, and DNA in the early 20th century paved the way for the development of techniques to examine the role of these elements in disease pathogenesis. Since the start of the 21st century, genetic testing and particularly next-generation sequencing has allowed for a rapid rate of gene disease associations for a broad range of primary immunodeficiency patients. At the same time, biologic and small molecule-based therapies targeting specific molecular pathways have been developed and are being applied clinically and in research settings to treat genetically defined immunodeficiencies. In recent years, both the American Academy of Allergy Asthma and Immunology and the Clinical Immunology Society have recommended the use of genetic testing for diagnosis, therapy guidance, and genetic counseling in patients with clinical symptoms of primary immunodeficiency.
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Mogensen TH. IRF and STAT Transcription Factors - From Basic Biology to Roles in Infection, Protective Immunity, and Primary Immunodeficiencies. Front Immunol 2019; 9:3047. [PMID: 30671054 PMCID: PMC6331453 DOI: 10.3389/fimmu.2018.03047] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 12/10/2018] [Indexed: 12/11/2022] Open
Abstract
The induction and action of type I interferon (IFN) is of fundamental importance in human immune defenses toward microbial pathogens, particularly viruses. Basic discoveries within the molecular and cellular signaling pathways regulating type I IFN induction and downstream actions have shown the essential role of the IFN regulatory factor (IRF) and the signal transducer and activator of transcription (STAT) families, respectively. However, the exact biological and immunological functions of these factors have been most clearly revealed through the study of inborn errors of immunity and the resultant infectious phenotypes in humans. The spectrum of human inborn errors of immunity caused by mutations in IRFs and STATs has proven very diverse. These diseases encompass herpes simplex encephalitis (HSE) and severe influenza in IRF3- and IRF7/IRF9 deficiency, respectively. They also include Mendelian susceptibility to mycobacterial infection (MSMD) in STAT1 deficiency, through disseminated measles infection associated with STAT2 deficiency, and finally staphylococcal abscesses and chronic mucocutaneous candidiasis (CMC) classically described with Hyper-IgE syndrome (HIES) in the case of STAT3 deficiency. More recently, increasing focus has been on aspects of autoimmunity and autoinflammation playing an important part in many primary immunodeficiency diseases (PID)s, as exemplified by STAT1 gain-of-function causing CMC and autoimmune thyroiditis, as well as a recently described autoinflammatory syndrome with hypogammaglobulinemia and lymphoproliferation as a result of STAT3 gain-of-function. Here I review the infectious, inflammatory, and autoimmune disorders arising from mutations in IRF and STAT transcription factors in humans, highlightning the underlying molecular mechanisms and immunopathogenesis as well as the clinical/therapeutic perspectives of these new insights.
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Affiliation(s)
- Trine H Mogensen
- Department of Infectious diseases, Aarhus University Hospital, Aarhus, Denmark.,Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
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Dorsey MJ, Puck JM. Newborn Screening for Severe Combined Immunodeficiency in the United States: Lessons Learned. Immunol Allergy Clin North Am 2018; 39:1-11. [PMID: 30466767 DOI: 10.1016/j.iac.2018.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In the United States, significant improvement in diagnosis and outcomes for children affected with severe combined immunodeficiency has followed institution of newborn screening using an assay to measure T-cell receptor excision circles in newborn dried blood spot specimens. Key to this outcome is the avoidance of infectious complications in infants with severe combined immunodeficiency.
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Affiliation(s)
- Morna J Dorsey
- Department of Pediatrics, University of California San Francisco, 555 Mission Bay Boulevard South, San Francisco, CA 94158, USA.
| | - Jennifer M Puck
- Department of Pediatrics, University of California San Francisco, Box 3118, 555 Mission Bay Boulevard South, Rm SC-252K, San Francisco, CA 94143, USA
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Development of a Population-Based Newborn Screening Method for Severe Combined Immunodeficiency in Manitoba, Canada. Int J Neonatal Screen 2018; 4:19. [PMID: 33072942 PMCID: PMC7548909 DOI: 10.3390/ijns4020019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 06/11/2018] [Indexed: 11/28/2022] Open
Abstract
The incidence of Severe Combined Immunodeficiency (SCID) in Manitoba, (1/15,000), is at least three to four times higher than the national average and that reported from other jurisdictions. It is overrepresented in two population groups: Mennonites (ZAP70 founder mutation) and First Nations of Northern Cree ancestry (IKBKB founder mutation). We have previously demonstrated that in these two populations the most widely utilized T-cell receptor excision circle (TREC) assay is an ineffective newborn screening test to detect SCID as these patients have normal numbers of mature T-cells. We have developed a semi-automated, closed tube, high resolution DNA melting procedure to simultaneously genotype both of these mutations from the same newborn blood spot DNA extract used for the TREC assay. Parallel analysis of all newborn screening specimens utilizing both TREC analysis and the high-resolution DNA procedure should provide as complete ascertainment as possible of SCID in the Manitoba population.
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