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Abstract Germline ATM gene variations result in phenotypic heterogeneity characterized by a variable degree of disease severity. We retrospectively collected clinical, genetic, and immunological data of 26 cases with A-T. Clinical manifestations included oculocutaneous telangiectasia (100%), ataxia (100%), fever, loose stools or infection (67%), cerebellar atrophy (50%), nystagmus (8%), dysarthria (15.38%), and visual impairment (8%). Genetic analysis confirmed ATM gene variations in 16 unrelated cases. The most common type of variation was stopgain variants (56%). Immunoglobulin profile indicated reduced IgA, IgG, and IgM in 94%, 50%, and 20% cases, respectively. T cell lymphopenia was observed in 80% of cases among those investigated. Unusual presentations included an EBV-associated smooth muscle tumour located in the liver in one case and Hyper IgM syndrome-like presentation in two cases. Increased immunosenescence was observed in T-cell subsets (CD4+CD57+ and CD8+CD57+). T-cell receptor excision circles (TRECs) were reduced in 3/8 (37.50%) cases.

Introduction: Inborn errors of immunity (IEI) are a group of genetically heterogeneous disorders with a wide-ranging clinical phenotype, varying from increased predisposition to infections to dysregulation of the immune system, including autoimmune phenomena, autoinflammatory disorders, lymphoproliferation, and malignancy. Lymphoproliferative disorder (LPD) in IEI refers to the nodal or extra-nodal and persistent or recurrent clonal or non-clonal proliferation of lymphoid cells in the clinical context of an inherited immunodeficiency or immune dysregulation. The Epstein-Barr virus (EBV) plays a significant role in the etiopathogenesis of LPD in IEIs. In patients with specific IEIs, lack of immune surveillance can lead to an uninhibited proliferation of EBV-infected cells that may result in chronic active EBV infection, hemophagocytic lymphohistiocytosis, and LPD, particularly lymphomas. Areas covered: We intend to discuss the pathogenesis, diagnosis, and treatment modalities directed toward EBV-associated LPD in patients with distinct IEIs. Expert opinion: EBV-driven lymphoproliferation in IEIs presents a diagnostic and therapeutic problem that necessitates a comprehensive understanding of host–pathogen interactions, immune dysregulation, and personalized treatment approaches. A multidisciplinary approach involving immunologists, hematologists, infectious disease specialists, and geneticists is paramount to addressing the diagnostic and therapeutic challenges posed by this intriguing yet formidable clinical entity. [ABSTRACT FROM AUTHOR]

Aim: To assess distress, insomnia, and psychosocial impact of SARS-CoV-2 outbreak on children with SLE and their caregivers. Methods: Patients with pSLE undergoing treatment in the Department of Pediatrics, PGIMER, Chandigarh, and their caregivers were enrolled. Questionnaires were sent to eligible patients and their parents through email or WhatsApp and telephonic interviews were conducted. Self-designed SLE-COVID-19 stress questionnaire; Peritraumatic Distress Inventory; Insomnia Severity Index, Positive and Negative Affect Schedule were used. Ethical approval was sought from Institutes Ethics Committee (IEC/2020/000583). Results: Telephonic connection was possible with 80 families (160 participants). Telephonic contact was possible with 80 families (160 participants); off these 61 children with pSLE (78.2%) and 55 caregivers (70.5%) responded to the questionnaire. Among participants, 23% patients, and 21.8% caregivers were severely stressed about SARS-CoV-2 infection; 78.7% patients and 80% caregivers had heard about hydroxychloroquine (HCQ) being used for the treatment of COVID-19; 52.7% caregivers exhibited moderate concern about shortage of HCQ; and 52.5% patients, and 43.6% caregivers were worried about side effects of HCQ. We found that 20 (32.8%) patients and 18 (32.7%) caregivers experienced significant distress. Majority of participants reported sleep disturbances. High positive affect scores were seen in 40 (65.5%) patients and 43 (78.2%) caregivers, low positive affect scores were noted in 21 (34.5%) patients and 12 (21.8%) caregivers. Conclusion: Patients with pSLE and their caregivers are at risk of psychosocial problems during the COVID-19 pandemic. Psychological interventions can be very helpful.

Kimura's disease (KD) is a chronic inflammatory disorder characterized by nontender lymphadenopathy involving the head and neck region. Renal involvement in KD is rare, especially in children. We report a 12‐year‐old boy who had been previously treated for classical KD and had presented with anasarca and oliguria after 4 years. There were no swellings or lymphadenopathy. The kidney biopsy revealed membranous nephropathy. Remission was achieved with oral prednisolone and tacrolimus therapy. This patient highlights the need to regularly monitor patients with KD for the evolution of renal diseases, even if lymphadenopathy regresses. Serial monitoring for eosinophilia, inflammatory markers, and urine examination is needed to help identify subclinical disease early and prompt initiation of specific therapy. [ABSTRACT FROM AUTHOR]

This article discusses a rare genetic disorder called hereditary fibrosing poikiloderma (HFP) that affects two siblings. HFP is characterized by childhood poikiloderma, muscle contractures, and pulmonary fibrotic defects. The siblings presented with pigmented cheek rash, eczematous lesions, and recurrent skin and ear infections. Genetic testing revealed a novel variation in the FAM111B gene, confirming a diagnosis of HFP. Treatment includes prophylactic antibiotics, photoprotection, and vitamin D supplementation. The article also explores the differential diagnoses and management approaches for HFP. [Extracted from the article]

Introduction: Hyper-IgE Syndrome (HIES) is a rare inborn error of immunity (IEI) characterized by a constellation of symptoms related to susceptibility to Staphylococcal skin and pulmonary infections, eczema, raised serum IgE (>2,000 IU/ml), craniofacial anomalies, and recurrent bone fractures. Data on HIES from the Indian subcontinent is scarce and restricted to small case series and case reports. This is the first compilation of national data on HIES.Materials and Methods: A total 103 cases clinically diagnosed and treated as HIES were analyzed from nine centers. Cases with clinical and/or molecular diagnosis of DOCK8 deficiency were not included. Patients were divided into two groups: group I for whom a heterozygous rare variant of STAT3 was identified, and group II, with clinical features similar to those of AD STAT3 deficiency, but without any genetic diagnosis.Results: Genetic diagnosis was available in 27 patients (26.2%) and all harbored rare variants in the STAT3 gene. Majority of these STAT3 HIES patients presented with recurrent skin abscesses (77.7%) or pneumonia (62.9%) or both (59.2%). Other features included eczema (37%), candidiasis (55.5%), facial dysmorphism (55.5%), recurrent fractures (11.1%), and retained primary teeth (7.4%). Mycobacterial infections were seen in a significant 18.5%. Mortality was seen in three subjects (11.1%). A similar trend in the clinical presentation was observed when all the 103 patients were analyzed together. Twenty percent of patients without a rare variant in the STAT3 gene had an NIH score of ≥40, whereas, 51.9% of STAT3 HIES subjects had scores below the cut off of ≥40. TH17 cell numbers were low in 10/11 (90.9%) STAT3 HIES tested. Rare variants observed were 8 in exon 21; 8 in exon 13; 3 in exon 10; 2 in exon 15, and one each in exon 6, 16, 17, 19, 22, and splice site downstream of exon 12. Seven variants were novel and included F174S, N567D, L404Sfs*8, G419 =, M329K, T714I, R518X, and a splice site variant downstream of exon 12.Conclusions: The report includes seven novel STAT3 variants, including a rare linker domain nonsense variant and a CC domain variant. Mycobacterial diseases were more frequent, compared to western literature.

Prolidase deficiency (PD) is a rare autosomal recessive disorder associated with recurrent infections, immune dysregulation, and autoimmunity. PD is characterized by persistent dermatitis, skin fragility, and non‐healing ulcerations on the lower limbs as its main dermatologic characteristics. Herein, we report a boy with PD due to a novel variant in PEPD who had abnormal facies, cognitive impairment, corneal opacity, recurrent infections, and persistent non‐healing leg ulcers. Th17 lymphocyte counts and phosphorylated‐STAT5 expression following IL‐2 stimulation were reduced in our patient as compared to healthy control. [ABSTRACT FROM AUTHOR]

This article examines the role of B cells in the development and treatment of primary podocytopathies, specifically minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS). The study focuses on adults with new-onset nephrotic syndrome (NS) caused by primary podocytopathy and compares them to healthy controls. The findings indicate that B cell proportions differ between children and adults, and specific B cell subsets are associated with disease activity and predict response to steroid treatment. These findings have implications for targeted therapies for primary podocytopathies. However, more research is needed to confirm these results. [Extracted from the article]