Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (2): 711-721.doi: 10.11843/j.issn.0366-6964.2025.02.022

• Animal Nutrition and Feeds • Previous Articles     Next Articles

Effects of Ursolic Acid on Breast Meat Quality and Wooden Breast of Broilers

ZHANG Xiwen(), YIN Yue, LI Xiang, WANG Min, WANG Yongfang, JIN Shuning, FENG Xinhui, ZHAO Yurong*()   

  1. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China
  • Received:2024-03-25 Online:2025-02-23 Published:2025-02-26
  • Contact: ZHAO Yurong E-mail:2516528679@qq.com;1335434506@qq.com

Abstract:

The purpose of this study was to investigate the effect of 450 mg·kg-1 ursolic acid(UA) on breast muscle quality of broilers and to explore its possible mechanism of action on wooden breast (WB). A total of 120 Arbor Acres (AA) broilers with similar initial body weight were selected as experimental animals and randomly divided into 2 groups with 6 replicates in each group and 10 chickens in each replicate. One group was fed a basal diet (CON group), and the other group was fed a basal diet added with 450 mg·kg-1 UA (UA group). The results of this experiment showed that: 1) UA significantly reduced the incidence of wooden breast and had the most significant effect in slightly or moderately WB (P<0.05). 2) UA could improve the breast muscle quality of broilers, which showed a significant decrease in shear force, yellowness and drip loss, but a significant increase in pH45min (P<0.05). 3) The results of tissue section observation showed that UA significantly reduced muscle fiber diameter, muscle fiber cross-sectional area and collagen volume ratio, and significantly increased muscle fiber density (P<0.01).4) UA significantly decreased the contents of CK and HYP in serum (P<0.01), significantly decreased the activities of PFK and LDH in breast muscle, and significantly increased the content of glycogen in breast muscle (P<0.01), but had no significant effect on the content of GLU in serum (P>0.05). 5) UA not only significantly increased T-AOC level, GSH-Px activity and decreased MDA content in breast muscle (P<0.05), but also significantly decreased the contents of TNF-α, IL-6 and TGF-β1 in breast muscle (P<0.05). 6) At the gene expression level, UA significantly reduced the expression of TGF-β1, IL-6, TNF-α, LDHA, PFK1, PI3K, HIF-1α, Akt1, P65 genes in breast muscle tissue (P<0.05), and significantly increased the expression of Smad7 gene (P<0.01). In summary, UA can improve the quality of breast muscle in broilers, inhibit glycolysis, increase muscle glycogen content, reduce the adverse effects of oxidative stress and inflammation of breast muscle on broilers, and effectively reduce the incidence of WB in broilers. This result may be achieved by inhibiting the PI3K/Akt/HIF-1α signaling pathway and enhancing the negative feedback regulation of the TGF-β1/Smads signaling pathway. Therefore, adding 450 mg·kg-1 UA to the basal diet of broilers is expected to be an effective strategy to alleviate the occurrence of WB.

Key words: chicken, ursolic acid, meat quality, wooden breast, oxidative stress, inflammatory response, hypoxia-inducible factor-1α

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