Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (7): 3244-3251.doi: 10.11843/j.issn.0366-6964.2025.07.018

• Animal Biotechnology and Reproduction • Previous Articles     Next Articles

Effect of Luteolin on Semen Cryopreservation of Qinchuan Bull

WU Silin1(), YANG Benshun1, YE Miaomiao1, LIANG Entang1, LI Fuqiang2, MA Weidong3, ZAN Linsen1, ZHAO Chunping1, YANG Wucai1,*()   

  1. 1. College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
    2. Hunan Tianhua Industrial Co., Ltd., Loudi 417100, China
    3. Shaanxi Province's High-Quality Agricultural and Pastoral Farms, Baoji 722203, China
  • Received:2024-12-16 Online:2025-07-23 Published:2025-07-25
  • Contact: YANG Wucai E-mail:wsliiiing@163.com;yangwucai111@163.com

Abstract:

The aim of this experiment was to investigate the effect of adding luteolin (LUT) to the diluent on the cryopreservation effect of semen from Qinchuan cattle. In this study, fresh semen was collected from 6 Qinchuan breeding bulls aged 3-5 years, weighing (586±20) kg and in good health. The tested semen was mixed, diluted with freeze-diluent with different concentrations of LUT added, and frozen for preservation. According to the different concentrations of LUT added in the cryodilution solution, this experiment was divided into 5 groups: 0 mg·mL-1 LUT group (control group), 0.02 mg·mL-1 LUT group, 0.04 mg·mL-1 LUT group, 0.08 mg·mL-1 LUT group and 0.1 mg·mL-1 LUT group, with 3 replicates set in each group. After thawing, sperm motility was measured using a bovine automatic sperm quality analyser; plasma membrane integrity was detected using the sperm hypotonic swelling test; sperm acrosome integrity and mitochondrial viability were detected using fluorescent staining; and spermatozoa were tested for catalase (CAT) activity, glutathione peroxidase (GSH-Px) activity, and malondialdehyde (MDA) content using a kit. Compared with the control group, sperm viability, linear motility speed, plasma membrane integrity and acrosome integrity were significantly increased in the 0.02 mg·mL-1 LUT and 0.04 mg·mL-1 LUT groups (P < 0.05). Meanwhile, sperm mitochondrial viability, CAT and GSH-Px activity in the 0.02 mg·mL-1 LUT group, 0.04 mg·mL-1 LUT group and 0.08 mg·mL-1 LUT group were significantly increased (P < 0.05), and MDA content was significantly decreased (P < 0.05) in all experimental groups. The optimum amount of LUT added was 0.02 mg·mL-1. The addition of LUT to the diluent could significantly improve the antioxidant capacity of spermatozoa in bovine semen, protect the structural integrity of spermatozoa, alleviate the damage to spermatozoa caused by the freezing-thawing process, and then enhance the motility of spermatozoa after thawing, thus effectively improving the quality of the frozen semen.

Key words: Qinchuan cattle, luteolin, semen, cryopreservation

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