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Al-Tamemi S, Al-Zadjali S, Bruwer Z, Naseem SUR, Al-Siyabi N, ALRawahi M, Alkharusi K, Al-Thihli K, Al-Murshedi F, AlSayegh A, Al-Maawali A, Dennison D. Genetic Causes, Clinical Features, and Survival of Underlying Inborn Errors of Immunity in Omani Patients: a Single-Center Study. J Clin Immunol 2023; 43:452-465. [PMID: 36324046 DOI: 10.1007/s10875-022-01394-3] [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: 05/31/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022]
Abstract
PURPOSE Early identification of inborn errors of immunity (IEIs) is crucial due to the significant risk of morbidity and mortality. This study aimed to describe the genetic causes, clinical features, and survival rate of IEIs in Omani patients. METHODS A prospective study of all Omani patients evaluated for immunodeficiency was conducted over a 17-year period. Clinical features and diagnostic immunological findings were recorded. Targeted gene testing was performed in cases of obvious immunodeficiency. For cases with less conclusive phenotypes, a gene panel was performed, followed by whole-exome sequencing if necessary. RESULTS A total of 185 patients were diagnosed with IEIs during the study period; of these, 60.5% were male. Mean ages at symptom onset and diagnosis were 30.0 and 50.5 months, respectively. Consanguinity and a family history of IEIs were present in 86.9% and 50.8%, respectively. Most patients presented with lower respiratory infections (65.9%), followed by growth and development manifestations (43.2%). Phagocytic defects were the most common cause of IEIs (31.9%), followed by combined immunodeficiency (21.1%). Overall, 109 of 132 patients (82.6%) who underwent genetic testing received a genetic diagnosis, while testing was inconclusive for the remaining 23 patients (17.4%). Among patients with established diagnoses, 37 genes and 44 variants were identified. Autosomal recessive inheritance was present in 81.7% of patients with gene defects. Several variants were novel. Intravenous immunoglobulin therapy was administered to 39.4% of patients and 21.6% received hematopoietic stem cell transplantation. The overall survival rate was 75.1%. CONCLUSION This study highlights the genetic causes of IEIs in Omani patients. This information may help in the early identification and management of the disease, thereby improving survival and quality of life.
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Affiliation(s)
- Salem Al-Tamemi
- Clinical Immunology & Allergy Unit, Department of Child Health, Sultan Qaboos University Hospital, Muscat, Oman.
| | - Shoaib Al-Zadjali
- Molecular Hematology Unit, Department of Hematology, Sultan Qaboos University Hospital, Muscat, Oman
| | - Zandre Bruwer
- Department of Clinical Genetics, Sultan Qaboos University Hospital, Muscat, Oman
| | - Shafiq-Ur-Rehman Naseem
- Clinical Immunology & Allergy Unit, Department of Child Health, Sultan Qaboos University Hospital, Muscat, Oman
| | - Nabila Al-Siyabi
- Clinical Immunology & Allergy Unit, Directorate of Nursing, Sultan Qaboos University Hospital, Muscat, Oman
| | - Mohammed ALRawahi
- Molecular Hematology Unit, Department of Hematology, Sultan Qaboos University Hospital, Muscat, Oman
| | - Khalsa Alkharusi
- Department of Clinical Genetics, Sultan Qaboos University Hospital, Muscat, Oman
| | - Khalid Al-Thihli
- Department of Clinical Genetics, Sultan Qaboos University Hospital, Muscat, Oman
| | - Fathiya Al-Murshedi
- Department of Clinical Genetics, Sultan Qaboos University Hospital, Muscat, Oman
| | - Abeer AlSayegh
- Department of Clinical Genetics, Sultan Qaboos University Hospital, Muscat, Oman
| | - Almundher Al-Maawali
- Department of Clinical Genetics, Sultan Qaboos University Hospital, Muscat, Oman
- Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Oman
| | - David Dennison
- Molecular Hematology Unit, Department of Hematology, Sultan Qaboos University Hospital, Muscat, Oman
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Challenges in and ideas for diagnosing primary immunodeficiencies in Uganda. Curr Opin Pediatr 2022; 34:595-599. [PMID: 36165606 DOI: 10.1097/mop.0000000000001182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE OF REVIEW Primary immunodeficiencies (PIDs) lately referred to as inborn errors of immunity, are consequences of mutations that affect the immune integrity and function. Globally, severe PIDs are more common in infants and are fatal if not timely - appropriately diagnosed and managed. PID programmes and policies vary from country to country. The purpose of this review is to highlight PIDs initiatives and activities in Uganda with a focus on challenges and ideas for diagnosis. RECENT FINDINGS It is now established that appropriate PID diagnosis leads to best treatment options for quality of life for the patients. However, there are still global disparities with these great milestones. PID awareness remains a fundamental global challenge. Autoimmune cytopenia, haemogram and peripheral blood film may be critical PIDs diagnostic markers and tests, respectively, for low-income countries. SUMMARY As awareness is a master key to appropriate PID diagnosis and management, there is a need to design multidisciplinary and sustainable strategies. Complete blood counts and immunoglobulin profile tests may be less expensive alternatives for early diagnosis of PIDs in Uganda and other low-income countries.
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