Increased hyperpolarized [1-¹³ C] lactate production in a model of joint inflammation is not accompanied by tissue acidosis as assessed using hyperpolarized ¹³ C-labelled bicarbonate.

ABSTRACT: Arthritic conditions are a major source of chronic pain. Furthering our understanding of disease mechanisms creates the opportunity to develop more targeted therapeutics. In rheumatoid arthritis (RA), measurements of pH in human synovial fluid suggest that acidosis occurs, but that this is highly variable between individuals. Here we sought to determine if tissue acidosis occurs in a widely used rodent arthritis model: complete Freund's adjuvant (CFA)-induced inflammation. CFA robustly evoked paw and ankle swelling, concomitant with worsening clinical scores over time. We used magnetic resonance spectroscopic imaging of hyperpolarized [1-¹³ C]pyruvate metabolism to demonstrate that CFA induces an increase in the lactate-to-pyruvate ratio. This increase is indicative of enhanced

SUBMITTER: Wright AJ 

PROVIDER: S-EPMC5887936 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature