Article

Hematologically important mutations: The autosomal recessive forms of chronic granulomatous disease (second update)

Sanquin Research, and Karl Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands. <>
Blood Cells Molecules and Diseases (Impact Factor: 2.33). 02/2010; 44(4):291-9. DOI: 10.1016/j.bcmd.2010.01.009
Source: PubMed

ABSTRACT Chronic granulomatous Disease (CGD) is an immunodeficiency disorder affecting about 1 in 250,000 individuals. The disease is caused by mutations in the genes encoding the components of the leukocyte NADPH oxidase. This enzyme produces superoxide, which is essential in the process of intracellular pathogen killing by phagocytic leukocytes. Four of the five genes involved in CGD are autosomal; these are CYBA, encoding p22-phox, NCF2, encoding p67-phox, NCF1, encoding p47-phox, and NCF4, encoding p40-phox. This article lists all mutations identified in these genes in the autosomal forms of CGD. Moreover, polymorphisms in these genes are also given, which should facilitate the recognition of future disease-causing mutations.

0 Bookmarks
 · 
258 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: Regulated transgene expression may improve safety and efficacy of hematopoietic stem cell (HSC) gene therapy. Clinical trials for X-linked Chronic Granulomatous Disease (X-CGD) employing gammaretroviral vectors were limited by insertional oncogenesis or lack of persistent engraftment. Our novel strategy, based on regulated lentiviral vectors (LV), targets gp91(phox) expression to the differentiated myeloid compartment while sparing HSC, to reduce the risk of genotoxicity and potential perturbation of reactive oxygen species levels. Targeting was obtained by a myeloid-specific promoter (MSP) and posttranscriptional, microRNA-mediated regulation. We optimized both components in human bone marrow HSC and their differentiated progeny in vitro and in a xenotransplantation model, and generated therapeutic gp91(phox) expressing LVs for CGD gene therapy. All vectors restored gp91(phox) expression and function in human X-CGD myeloid cell lines, primary monocytes and differentiated myeloid cells. While unregulated LVs ectopically expressed gp91(phox) in CD34(+) cells, transcriptionally and posttranscriptionally regulated LVs substantially reduced this off-target expression. X-CGD mice transplanted with transduced HSC restored gp91(phox) expression, and MSP-driven vectors maintained regulation during BM development. Combining transcriptional (SP146.gp91-driven) and posttranscriptional (miR-126-restricted) targeting, we achieved high levels of myeloid-specific transgene expression, entirely sparing the CD34+ HSC compartment. This dual-targeted LV construct represents a promising candidate for further clinical development.Molecular Therapy (2014); doi:10.1038/mt.2014.87.
    Molecular Therapy 05/2014; 22(8). DOI:10.1038/mt.2014.87 · 6.43 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Chronic granulomatous disease is a primary immunodeficiency caused by mutations in the genes encoding subunits of the phagocytic NADPH oxidase system. Patients can present with severe, recurrent infections and noninfectious conditions. Among the latter, inflammatory manifestations are predominant, especially granulomas and colitis. In this article, we systematically review the possible mechanisms of hyperinflammation in this rare primary immunodeficiency condition and their correlations with clinical aspects.
    Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas / Sociedade Brasileira de Biofisica ... [et al.] 08/2014; DOI:10.1590/1414-431X20143735 · 1.08 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Chronic granulomatous disease (CGD) is an inherited orphan disorder caused by mutations in one of the five genes encoding reduced nicotinamide-adenine-dinucleotide-phosphate oxidase subunits, which subsequently lead to impairment in the production of microbicidal reactive oxygen species (ROS). In order to offer several cell line models of CGD and therefore support research on pathophysiology and new therapeutic approaches, we optimized protocols to differentiate induced pluripotent stem cells (iPSCs) from wild-type, X 0 -, AR22 0 -and AR47 0 -CGD patient's fibroblasts into neutrophils and into macrophages. Aberrant genetic clones were dis-carded after chromosome karyotyping and array-comparative genomic hybridization analysis. All remaining iPSC lines showed human embryonic stem cell–like morphology, expressed all tested pluripotency markers and formed embryoid bodies that contained cells originating from all three primary germ layers. Furthermore, each CGD patient-specific iPSC line retained the gp91 phox , p47 phox , and p22 phox mutations found in the corre-sponding patient's neutrophils. The average production of CD34 + progenitors was of 1.5 · 10 6 cells after 10 days of differentiation of 10 · 10 6 iPSCs. They were terminally differentiated into about 3 · 10 5 neutrophils or into 3 · 10 7 macrophages. Based on morphological, phenotypical, and functional criteria both phagocyte types were mature and indistinguishable from the native human neutrophils and macrophages. However, neutrophils and macrophages derived from X 0 -, AR22 0 -, and AR47 0 -CGD patient-specific iPSC lines lacked ROS produc-tion and the corresponding mutated proteins. To simplify the phagocytes' production upon request, progenitors can be cryopreserved. In conclusion, we describe a reproducible, simple, and efficient way to generate neutro-phils and macrophages from iPSCs and provide a new cellular model for the AR22 0 -CGD genetic form that has not been described before.
    12/2014; DOI:10.1089/biores.2014.0045

Full-text

Download
118 Downloads
Available from
May 31, 2014