Effects of surgery on free and total 25 hydroxyvitamin D concentrations in dogs. (14th October 2020)

• Record Type: Journal Article
• Authors: Clements, Dylan N.; Bruce, Gemma; Ryan, John M.; Handel, Ian G.; Oikonomidis, Ioannis L.; Gow, Adam G.; Evans, Helen; Campbell, Susan; Hurst, Emma; Mellanby, Richard J.
• Is Part Of: Journal of veterinary internal medicine. Volume 34:Number 6(2020)
• Page Start: 2617
• Page End: 2621
• Publication Date: 2020-10-14
• Subjects: 25 hydroxyvitamin D -- cruciate rupture -- dog -- inflammation -- vitamin D; Veterinary medicine -- Periodicals; 636.0896
• DOI: 10.1111/jvim.15933
• Languages: English
• ISSNs: 0891-6640

Abstract

Abstract: Background: It is unclear whether a low total 25(OH)D concentration is a cause or consequence of illnesses. To address this knowledge gap, studies measuring free and total 25(OH)D during the evolution and resolution of an inflammatory process are required. Objectives: Serum total and free 25(OH)D concentrations would transiently decline after cruciate surgery in dogs. Animals: Seventeen client‐owned dogs with a spontaneous cranial cruciate ligament rupture (CCLR). Methods: A longitudinal cohort study involving the measurement of serum concentrations of total and free 25(OH)D, total calcium, creatinine, albumin, phosphate, C‐reactive protein and plasma ionized calcium, at 1 day before and a median time of 1 and 60 days after surgical treatment of CCLR. Results: Median serum concentrations of total 25(OH)D before surgery (80.3 nmoL/L [range, 43.5‐137.3]) significantly declined immediately after surgery; (64.8 nmoL/L [range, 36.3‐116.5] 1 day after surgery, P < .005) before increasing to become nonsignificantly different from concentrations before surgery at day 60 after surgery (median 78.0 nmoL/L [range, 24.2‐115.8], P = .14). In contrast, median free 25(OH)D concentrations before surgery (7.6 pg/mL [range, 3.8‐12.2]) significantly increased immediately after surgery (9.2 pg/mL [range, 5.2‐15.7], P < .05) before declining to become nonsignificantly different from before surgery concentrations at day 60 after surgery (median 6.2 pg/mL [range, 4.0‐15.8], P = .37). Conclusion and Clinical Importance: This study reveals the difficulties of assessing vitamin D status in dogs following elective surgery.