Abstract：
:Previous studies have suggested that Interleukin-6 (IL-6) acts as a marker of vasculitis. To determine the role of IL-6 in vasculitis we utilized two models of immune complex induced vascular injury (dermal Arthus and acute pulmonary alveolitis) in IL-6 deficient (IL-6(-/-)) and IL-6 sufficient (IL-6(+/+)) mice. Plasma and bronchoalveolar lavage (BAL) levels of IL-6 were elevated in the injured IL-6(+/+) mice with acute alveolitis and in the plasma of IL-6(+/+) mice with dermal Arthus vasculitis. While, IL-6 levels in IL-6(-/-) mice were near or below the levels of detection. Histological examination of the intensity of vascular injury response demonstrated no significant differences between IL-6(-/-) and IL6(+/+) mice. More specifically, lung permeability (total protein in the BAL) in the lung injury model in IL-6(-/-) mice was the same as injured IL-6(+/+) mice. As a corollary, assessment of vascular permeability in both models was the same in the IL-6(-/-) as the IL-6(+/+) mice. Quantification of leukocyte influx into the injured tissues in both models also revealed no differences between the IL-6(-/-) and IL-6(+/+) mice. These data demonstrate that while IL-6 is upregulated in acute vascular injury it does not appear to be critical in the development of the vascular inflammatory response.
journal_name
Inflammationjournal_title
Inflammationauthors
McClintock SD,Barron AG,Olle EW,Deogracias MP,Warner RL,Opp M,Johnson KJdoi
10.1007/s10753-006-9011-1subject
Has Abstractpub_date
2005-12-01 00:00:00pages
154-62issue
4-6eissn
0360-3997issn
1573-2576journal_volume
29pub_type
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