Published in:
Open Access
01-12-2009 | Research article
Elevation of Bombina variegata peptide 8 in mice with collagen-induced arthritis
Authors:
Daitaro Kurosaka, Kentaro Noda, Ken Yoshida, Kazuhiro Furuya, Taro Ukichi, Eigo Takahashi, Maimi Yanagimachi, Isamu Kingetsu, Saburo Saito, Akio Yamada
Published in:
BMC Musculoskeletal Disorders
|
Issue 1/2009
Login to get access
Abstract
Background
Bombina variegate peptide 8 (Bv8) is a small protein secreted by frog skin. Recently it has been shown to contribute to tumor angiogenesis in mouse model. The purpose of this study was to investigate Bv8 in mice with type II collagen-induced arthritis (CIA).
Methods
We induced CIA in male DBA/1J mice. The severity of arthritis was evaluated based on an arthritis score. RNA was extracted from the joint, and examined for Bv8 mRNA expression by RT-PCR and real-time RT-PCR. Synovial tissue and bone marrow were immunohistochemically examined using anti-Bv8 antibody.
Results
The level of Bv8 mRNA expression in the joint was below the detection limit in the control group, but was elevated in the CIA group, and was correlated with the arthritis score. In addition, an increase in Bv8-positive cells was observed in the synovium and bone marrow in the CIA group.
Conclusion
Bv8 was elevated in the synovium and bone marrow of CIA mice, suggesting that Bv8 plays an important role in the pathogenesis of arthritis.