Ijiri Moe, Odo Kenji, Sato Motohiko, Kawaguchi Maiko, Fujimoto Yoshikazu, Miura Naoki, Matsuo Tomohide, Hou De-Xing, Yamato Osamu, Tanabe Takashi, Kawaguchi Hiroaki
Joint Faculty of Veterinary Medicine, Kagoshima University, 890-0065 Kagoshima, Japan.
Kagoshima City Meat Inspection Center, 891-0144 Kagoshima, Japan.
J Vet Res. 2022 May 31;66(2):209-214. doi: 10.2478/jvetres-2022-0024. eCollection 2022 Jun.
Potential biomarkers for chronic seasonal heat stress in Kagoshima Berkshire pigs reared in the subtropical region were investigated by comparing the biomarker changes in the summer (a period of chronic heat stress) and winter (a thermoneutral period) seasons.
Pigs were allocated to summer- and winter-finishing cohorts, 12 each. The evaluations included assessment of carcass traits and internal organs' normality carried out at the time of slaughter, and measurement of biomarkers in whole blood: derivatives of reactive oxygen metabolites (d-ROMs) and biological antioxidant potential as markers of oxidative stress, and serum amyloid A and albumin/globulin (A/G) ratio as markers of acute and chronic inflammation, respectively.
The summer-finished pigs reared under subtropical field conditions showed lower carcass quality than the winter-finished pigs, indicating a potential adverse effect of summer temperatures on the swine industry. Marginal changes were observed in d-ROMs and the A/G ratio between the summer- and winter-finishing cohorts.
The results demonstrate that d-ROMs and the A/G ratio could be used as sensitive markers for heat stress under field conditions.
通过比较亚热带地区饲养的鹿儿岛伯克夏猪在夏季（慢性热应激期）和冬季（热中性期）的生物标志物变化，研究了慢性季节性热应激的潜在生物标志物。
将猪分为夏季和冬季育肥组，每组12头。评估包括屠宰时对胴体性状和内脏正常性的评估，以及全血中生物标志物的测量：活性氧代谢产物衍生物（d-ROMs）和生物抗氧化潜力作为氧化应激标志物，血清淀粉样蛋白A和白蛋白/球蛋白（A/G）比值分别作为急性和慢性炎症标志物。
在亚热带田间条件下饲养的夏季育肥猪的胴体质量低于冬季育肥猪，表明夏季温度对养猪业有潜在不利影响。夏季和冬季育肥组之间的d-ROMs和A/G比值有轻微变化。
结果表明，d-ROMs和A/G比值可作为田间条件下热应激的敏感标志物。
