Rabbit Anti-Human NCF4 (a.a. 1-348) Polyclonal antibody

Chronic granulomatous disease (CGD) is a primary immunodeficiency characterized by susceptibility to bacterial and fungal infections resulting from the inadequacy of phagocytic leucocytes to produce reactive oxygen radicals. CGD is a genetically heterogeneous disease with an X-linked recessive (XR-CGD) form caused by mutations in the CYBB (OMIM #300481) gene encoding the gp91(phox) protein, and an autosomal recessive (AR-CGD) form caused by mutations in the CYBA (OMIM #608508), NCF1 (OMIM #608512), NCF2 (OMIM #608515) and NCF4 (OMIM #601488) genes encoding p22(phox), p47(phox), p67(phox) and p40(phox), respectively. The genetic mutation of one of the cytosolic p47phox/p67phox proteins and membrane-bound gp91phox/p22phox proteins, which constitutes the NADPH oxidase enzyme complex, causes the disease. In this study, we evaluated the clinical, laboratory and genetic findings and the prognostic effects of molecular inheritance of our 24 CGD cases (14 XR, 10 autosomal recessive-AR). Consanguinity (three XR and all AR cases) showed statistically significant relationship with the type of hereditary inheritance (P < 0.001). 83% patients had an infection since early infancy. The mean age of initiation of symptoms was earlier in XR cases, and 78% patients had respiratory tract infections. Bone marrow transplantation was performed in five XR cases (two ex) and four AR (one ex) cases. Three of nine XR and two of six AR cases deceased on medical follow-up. In countries especially with high consanguinity rates, the early diagnosis for appropriate prophylactic treatment of CGD is quietly important to avoid from recurrent severe infections, early death and fatal complications of late transplantation.

Chronic granulomatous disease (CGD) is a rare primary immunodeficiency caused by defects in the genes encoding any of the NADPH oxidase components responsible for the respiratory burst of phagocytic leukocytes. CGD is a genetically heterogeneous disease with an X-linked recessive (XR-CGD) form caused by mutations in the CYBB gene encoding the gp91(phox) protein, and an autosomal recessive (AR-CGD) form caused by mutations in the CYBA, NCF1, NCF2, or NCF4 genes encoding p22(phox), p47(phox), p67(phox), and p40(phox), respectively. Patients suffering from this disease are susceptible to severe life-threatening bacterial and fungal infections and excessive inflammation characterized by granuloma formation in any organ, for instance, the gastrointestinal and genitourinary tract. An early diagnosis of and the prompt treatment for these conditions are crucial for an optimal outcome of affected patients. To prevent infections, CGD patients should receive lifelong antibiotics and antifungal prophylaxis. These two measures, as well as newer more effective antimicrobials, have significantly modified the natural history of CGD, resulting in a remarkable change in overall survival, which is now around 90%, reaching well into adulthood. At present, hematopoietic stem cell transplantation (HSCT) is the only definitive treatment that can cure CGD and reverse organ dysfunction. Timing, donor selection, and conditioning regimens remain the key points of this therapy. In recent years, gene therapy (GT) for XR-CGD has been proposed as an alternative to HSCT for CGD patients without a matched donor. After the failure of the first trials performed with retroviral vectors, some groups have proposed the use of regulated SIN-lentiviral vectors targeting gp91(phox) expression in myeloid cells to increase the safety and efficacy of the GT protocols.