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Endogenous Nitric Oxide Production in Canine Osteoarthritis: Detection in Urine, Serum, and Synovial Fluid Specimens
Author(s) -
Spreng David,
Sigrist Nadja,
Schweighauser Ariane,
Busato André,
Schawalder Peter
Publication year - 2001
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1053/jvet.2001.21397
Subject(s) - medicine , creatinine , osteoarthritis , synovial fluid , urine , nitrite , nitric oxide , cruciate ligament , urinary system , population , urology , clinical significance , gastroenterology , pathology , surgery , anterior cruciate ligament , nitrate , ecology , alternative medicine , environmental health , biology
Objective— To measure nitric oxide (NO) concentrations in serum, urine, and synovial fluid (SF) of dogs with naturally occurring cranial cruciate ligament (CCL) rupture and normal dogs, and to compare these with clinical and histologic changes of osteoarthritis (OA). Study Design— Prospective clinical study including 2 groups of animals selected from the hospital population. Animals— Forty‐three dogs (CCL group) with OA secondary to CCL rupture; 30 healthy dogs (control group) without CCL rupture. Methods— Serum, urine, and SF were collected before and during surgery in the CCL group or immediately after euthanasia in the control group. Articular cartilage and synovial membrane tissue specimens were prepared for routine histologic examination. The stable end products of NO, total nitrite and nitrate (NOt) activity, were measured in body fluids and compared with macroscopic and histologic degrees of OA. Urinary NOt concentration was compared with urinary creatinine concentration and stated as urinary NOt:creatinine ratio (UNCR). Results— SF NOt concentrations were not significantly different between the 2 groups. Serum NOt concentrations (45.6 vs 28.9 μmol/L; P = .042 ) and the UNCR ( 0.007 vs 0.004; P = .035 ) were significantly higher in dogs of the CCL group compared with the control population. An association between UNCR and histologic and macroscopical OA grades could be demonstrated. Conclusion— UNCR might be a useful indicator of nitrite and nitrate production and, therefore, osteoarthritic changes in joints. Clinical Relevance— UNCR could be used as a tool to evaluate the NOt production by joint tissues over time and might therefore provide a method of evaluating the effects of drugs in the control of osteoarthritis.