Investigating Chromosomal Radiosensitivity in Inborn Errors of Immunity: Insights from DNA Repair Disorders and Beyond

J Clin Immunol. 2025 Feb 13;45(1):75. doi: 10.1007/s10875-025-01858-2. ABSTRACT Human inborn errors of immunity (IEI) represent a diverse group of genetic disorders affecting the innate and/or adaptive immune system. Some IEI entities comprise defects in DNA repair factors, resulting in (severe) combined immunodeficiencies, bone marrow failure, predisposition to malignancies, and potentially resulting in radiosensitivity (RS). … Read more

Early Haploidentical Hematopoietic Stem Cell Transplantation Provides Rapid Leukocyte and Immune Reconstitution in AK2 Patient Identified by TREC Newborn Screening

J Clin Immunol. 2025 Feb 11;45(1):74. doi: 10.1007/s10875-025-01863-5. ABSTRACT Reticular dysgenesis (RD) is a rare inborn error of immune cell formation defined by severe combined immunodeficiency, agranulocytosis and sensorineural deafness. We report a case of successful haploidentical maternal hematopoietic stem cell transplantation (HSCT) in a boy with RD detected by TREC newborn screening. The patient … Read more

Pulmonary Aspergillosis and Low HIES Score in a Family with STAT3 N-Terminal Domain Mutation

J Clin Immunol. 2025 Feb 10;45(1):73. doi: 10.1007/s10875-025-01867-1. ABSTRACT Signal transducer and activator of transcription 3 (STAT3) plays a key role in leukocytic and non-leukocytic cells. Germ line mutations in STAT3, which are mainly found in the SH2, DNA binding and transactivation domains, can be loss- or gain-of-function (LOF and GOF). STAT3 N-terminal domain (NTD) … Read more

ATM Expression and Activation in Ataxia Telangiectasia Patients with and without Class Switch Recombination Defects

J Clin Immunol. 2025 Jan 24;45(1):67. doi: 10.1007/s10875-025-01857-3. ABSTRACT BACKGROUND: Ataxia telangiectasia mutated (ATM) kinase plays a critical role in DNA double-strand break (DSB) repair. Ataxia telangiectasia (A-T) patients exhibit abnormalities in immunoglobulin isotype expression and class switch recombination (CSR). This study investigates the role of residual ATM kinase expression and activity in the severity … Read more

Hypomorphic RAG2 Deficiency Promotes Selection of Self-Reactive B Cells

J Clin Immunol. 2025 Jan 15;45(1):66. doi: 10.1007/s10875-024-01849-9. ABSTRACT Reduced function or hypomorphic variants in recombination-activating genes (RAG) 1 or 2 result in a broad clinical phenotype including common variable immunodeficiency (CVID) and even adult-onset disease. Milder RAG variants are less characterized. Here we describe the longitudinal course of a milder combined RAG deficiency in … Read more

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