Abstract：
:Phagocytes from X-linked chronic granulomatous disease (X-CGD) patients are deficient in their ability to generate superoxide because of a defective gene that encodes a heavy chain of cytochrome b, a critical component in the superoxide-generating pathway. Previously we have shown that a single in vivo treatment of selected X-CGD patients with interferon-gamma (INF-gamma) resulted 14 days later in near-normal levels of superoxide generation by phagocytes. The effect persisted for 28 days. This prolonged effect suggested that the lymphokine affected progenitor cells. In this study, we examined progenitor-derived colonies from the peripheral blood from this unusual X-CGD kindred. Progenitor-derived colonies examined before treatment were unable to generate superoxide as visualized by lack of nitro blue tetrazolium (NBT) reduction compared with normal controls. By contrast, colonies derived 7 days after a single INF-gamma injection were able to generate superoxide as shown by increased NBT reduction. Colonies harvested 21 days after treatment contained only rare cells capable of NBT reduction. Our results indicate that INF-gamma can reprogram the myeloid progenitor cells to express a partially corrected phenotype. This corrected phenotype is later expressed in daughter cells.
journal_name
Bloodjournal_title
Bloodauthors
Ezekowitz RA,Sieff CA,Dinauer MC,Nathan DG,Orkin SH,Newburger PEsubject
Has Abstractpub_date
1990-12-15 00:00:00pages
2443-8issue
12eissn
0006-4971issn
1528-0020journal_volume
76pub_type
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