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Abstract

Relative importance of CCR5 and antineutrophil cytoplasmic antibodies in patients with Wegener's granulomatosis.

Yihua Zhou, Deren Huang, Carol Farver and Gary S Hoffman
The Journal of Rheumatology July 2003, 30 (7) 1541-1547;
Yihua Zhou
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Deren Huang
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Carol Farver
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Gary S Hoffman
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Abstract

OBJECTIVE: Wegener's granulomatosis (WG) is an idiopathic inflammatory condition characterized by upper and lower airway involvement and often renal dysfunction. Sites of tissue injury include pleomorphic cell populations, and classically mononuclear cell infiltrates that may form granulomas. Vascular inflammation (i.e., vasculitis) is often but not always present. Because CCR5 and its ligands influence mononuclear cell trafficking, we sought to identify their expression in pulmonary lesions and to determine whether genetic variations in genes for CCR5 and its ligands influence susceptibility to WG. METHODS: Lung biopsies from 4 patients that had classical features of WG were examined for protein expression of CCR5, RANTES, MIP-1alpha and MIP-1beta using immunohistochemistry. One hundred eighteen Caucasian patients with WG and 127 ethnically matched healthy controls were included in the genetic analysis. Genomic DNA samples were amplified by PCR. CCR5 Delta32 and RANTES -28 and -401 polymorphisms were determined by either specific primers or direct sequencing. RESULTS: CCR5+ cells were enriched in lung lesions from patients with WG. Enhanced protein concentrations of RANTES, MIP-1alpha, and MIP-1beta were present in WG lung lesions, indicating redundancy of ligands for CCR5 in affected tissue. Genetic analyses revealed 3 subsets of patients with WG: (1) circulating antineutrophil cytoplasmic antibody (ANCA) positive and CCR5+/+ (58%); (2) CCR5+/+ and ANCA negative (22%); and (3) CCR5 Delta32 and ANCA positive (20%). Among patients in whom ANCA were repeatedly absent, none was found to carry the CCR5 Delta32 allele. Conversely, patients who possessed the CCR5 Delta32 allele were always ANCA positive. CONCLUSION: CCR5 and its ligands are abundantly present in pulmonary lesions in WG. The absence of a genetic deletion for CCR5 (CCR5 Delta32) in WG patients lacking ANCA suggests that CCR5 may exert a particularly important pathogenetic role in those patients. Another subset of patients (approximately 20%) with WG possessed a genetic deletion for CCR5. That each of these patients was ANCA positive implies that an alternative pathway to CCR5 may exist, for which ANCA may be especially important.

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The Journal of Rheumatology
Vol. 30, Issue 7
1 Jul 2003
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Relative importance of CCR5 and antineutrophil cytoplasmic antibodies in patients with Wegener's granulomatosis.
Yihua Zhou, Deren Huang, Carol Farver, Gary S Hoffman
The Journal of Rheumatology Jul 2003, 30 (7) 1541-1547;

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Relative importance of CCR5 and antineutrophil cytoplasmic antibodies in patients with Wegener's granulomatosis.
Yihua Zhou, Deren Huang, Carol Farver, Gary S Hoffman
The Journal of Rheumatology Jul 2003, 30 (7) 1541-1547;
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