Uncovering Deletion/Insertion Mutations in Veno-Occlusive Disease with Immunodeficiency Syndrome in An Iranian Family: A Case Report.

Cell J

Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.

Published: October 2024

AI Article Synopsis

  • - Veno-occlusive disease with immunodeficiency (VODI) syndrome is a rare genetic disorder with immune system issues and high mortality, linked to mutations on chromosome 2q37.1, particularly concerning tuberculosis.
  • - A case study of a three-year-old girl with suspected immunodeficiency utilized whole-exome sequencing (WES) to find and confirm pathogenic mutations, revealing a novel deletion-insertion mutation affecting the SP110 protein.
  • - This research aims to improve the diagnosis of VODI syndrome by identifying various mutations in the SP110 gene, which could lead to targeted therapies and better treatment options.

Article Abstract

Veno-occlusive disease with immunodeficiency (VODI) syndrome is a rare genetic disorder characterized by immune system irregularities and a significant mortality rate, despite its infrequency. , situated on chromosome 2q37.1, plays a pivotal role in VODI syndrome, and its association with tuberculosis has been extensively studied. The identification of mutations holds promise for accelerating the diagnosis and treatment of VODI syndrome, by providing a comprehensive panel for diagnosis and potentially leading to targeted therapies. In this case study, we examined a three-year-old girl born to a consanguineous union who was suspected of having an immunodeficiency disorder. Whole-exome sequencing (WES) and clinical assessments were conducted to screen for and confirm potentially pathogenic mutations. The detected mutation was further analyzed using bioinformatics tools to forecast its impact on protein structure. WES analysis revealed a novel deletion-insertion mutation, , within . Protein analysis indicated substantial structural modifications in the SP110 protein. This study identified a novel deletion-insertion mutation as a potential contributor to VODI syndrome by affecting the functionality of the SP110 protein. By including various mutations associated with the gene, this study aimed to expedite diagnosis by creating a comprehensive panel for VODI syndrome.

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Source
http://dx.doi.org/10.22074/cellj.2024.2023359.1514DOI Listing

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Article Synopsis
  • - Veno-occlusive disease with immunodeficiency (VODI) syndrome is a rare genetic disorder with immune system issues and high mortality, linked to mutations on chromosome 2q37.1, particularly concerning tuberculosis.
  • - A case study of a three-year-old girl with suspected immunodeficiency utilized whole-exome sequencing (WES) to find and confirm pathogenic mutations, revealing a novel deletion-insertion mutation affecting the SP110 protein.
  • - This research aims to improve the diagnosis of VODI syndrome by identifying various mutations in the SP110 gene, which could lead to targeted therapies and better treatment options.
View Article and Find Full Text PDF
Article Synopsis
  • - Mutations in the SP110 gene cause veno-occlusive disease with immunodeficiency (VODI), a serious condition that requires early diagnosis and treatment to improve patient outcomes.
  • - Current diagnostic methods struggle to identify VODI due to factors like ineffective screening for T cell deficiencies, complex gene sequencing, and a lack of functional tests for new mutations.
  • - A new flow cytometric assay has been developed that is easy to use in labs, potentially allowing for quicker and more accurate diagnosis of VODI and further research into the SP110 gene’s function.
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Hepatic sinusoidal obstruction syndrome (SOS) is an obliterative venulitis of the terminal hepatic venules, which in its more severe forms imparts a high risk of mortality. SOS, also known as veno-occlusive disease (VOD), occurs as a result of cytoreductive therapy prior to hematopoietic stem cell transplantation (HSCT), following oxaliplatin-containing adjuvant or neoadjuvant chemotherapy for colorectal carcinoma metastatic to the liver and treated by partial hepatectomy, in patients taking pyrrolizidine alkaloid-containing herbal remedies, and in other particular settings such as the autosomal recessive condition of veno-occlusive disease with immunodeficiency (VODI). A central pathogenic event is toxic destruction of hepatic sinusoidal endothelial cells (SEC), with sloughing and downstream occlusion of terminal hepatic venules.

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Background: Veno-occlusive disease with immunodeficiency (VODI) is an autosomal recessive disorder of combined immunodeficiency (CID) and hepatic injury. Hematopoietic stem cell transplantation (HSCT) - the only definitive treatment for CID - appeared to have a high rate of complications in a previous report. In this study, we describe a new group of patients with VODI highlighting further clinical and immunologic aspects of this disease and re-evaluating the effectiveness of HSCT for the treatment of this disorder.

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