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Yan K, Liu X, Li L, Zhu S, Zheng L, He S, Jia X, Dong W, Liu Y, Lu Z, Yang F. Ultrasound-assisted deep eutectic solvents extraction of polysaccharides from Loquat leaf: Process optimization and bioactivity study. Int J Biol Macromol 2024; 274:133308. [PMID: 38908619 DOI: 10.1016/j.ijbiomac.2024.133308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 05/13/2024] [Accepted: 06/19/2024] [Indexed: 06/24/2024]
Abstract
Loquat leaves are the by-product of loquat fruit production. Polysaccharides are one of the main active ingredients in loquat leaves. In this study, polysaccharides were extracted from loquat leaves by ultrasonic-assisted deep eutectic solvents (DESs) extraction method. Further, the extracted crude loquat leaf polysaccharides (CLLP) were purified and separated via S-8 resin and DEAE-52 cellulose column chromatography, respectively. Additionally, the effects of polysaccharides on activity of sperm in boar semen preserved in medium at 17 °C, were evaluated preliminarily. DES, composed of choline chloride/ethylene glycol (1:6, molar ratio), was proved to be the suitable solvent for LLP extraction. The optimized extraction conditions were water content 44 %, liquid-solid ratio 1:29 (g/g), extraction temperature 61 °C and extraction time 98 min. Under these conditions, the LLP yield was 57.82 ± 1.50 mg/g. A homogeneous polysaccharide (LLP1-2, Mw: 2.17 × 104 Da) was isolated from CLLP. Its total sugar, uronic acid and protein contents were 76.31 ± 1.25 %, 14.19 ± 0.67 % and 3.28 ± 0.42 %, respectively. Further, 800 μg/mL LLP1-2 could effectively enhance the antioxidant activity of sperm. This study laid a foundation for DESs and column chromatography in the field of polysaccharide extraction and separation, proving that LLP can be used as a natural antioxidant for sperm preservation.
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Affiliation(s)
- Ke Yan
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xianglin Liu
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lin Li
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shuyu Zhu
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lijuan Zheng
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Shuyang He
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaomin Jia
- School of Life Sciences, Yan'an University, Yan'an, Shaanxi 716000, China
| | - Wuzi Dong
- Shaanxi Dayi Xunlong Biotechnology Co., LTD, Yangling, Shaanxi 712100, China
| | - Yupeng Liu
- National Engineering & Technology Research Center of Forest Chemical Industry, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu 210037, China
| | - Zhoumin Lu
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Fangxia Yang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China; Shaanxi Provincial Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Bolarin A, Berndtson J, Tejerina F, Cobos S, Pomarino C, D'Alessio F, Blackburn H, Kaeoket K. Boar semen cryopreservation: State of the art, and international trade vision. Anim Reprod Sci 2024:107496. [PMID: 38763787 DOI: 10.1016/j.anireprosci.2024.107496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/05/2024] [Accepted: 05/06/2024] [Indexed: 05/21/2024]
Abstract
Biosecurity is a major concern in the global pig production. The separation in time of semen collection, processing and insemination in the pig farm is a few days for chilled semen but it can be indefinite when using cryopreserved semen. Field fertility results of boar cryopreserved semen are close to chilled semen, which makes it a valuable resource for the establishment of semen genebanks, long-distance semen trade, and the implementation of other technologies such as the sex-sorted semen. But cryopreserved semen is far from being routine in pig farms. The most recent research efforts to facilitate its implementation include the use of additives before freezing, or in the thawing extender. Long-term preserved semen trade is a biosecurity challenge. To harmonize international trade of germplasm, the World Organization of Animal Health (WOAH) established a regulatory framework for all member countries. The present paper aims to review the latest advances of boar semen cryopreservation with special focus on the benefits of its inclusion as a routine tool in the pig industry. We also review recently reported field fertility results of cryopreserved semen, its international trade compared to chilled semen, and the regulatory framework involved. Boar cryopreserved semen is a valuable tool to control biosecurity risk, implement other technologies, and facilitate international trade. Research already demonstrated good field fertility results, but it still represents less than 0.1 % of the international trade. As boar cryopreserved semen gets closer to implementation, the correspondent authorities are reviewing the trade rules.
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Affiliation(s)
| | | | - F Tejerina
- Ministry of Agriculture, Fisheries and Food. General Sub-directorate of Livestock Inputs, Madrid, Spain
| | - S Cobos
- Ministry of Agriculture, Fisheries and Food. General Sub-directorate of Health Agreements and Border Control, Madrid, Spain
| | - C Pomarino
- Ministry of Agriculture, Fisheries and Food. General Sub-directorate of Animal Health and Hygiene and Traceability, Madrid, Spain
| | - F D'Alessio
- World Organization for Animal Health (OIE), Paris, France
| | - H Blackburn
- USDA-ARS, National Animal Germplasm Program, Fort Collins, CO, United States
| | - K Kaeoket
- Semen Laboratory, Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhon-Pathom 73170, Thailand
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Yang D, Yu X, Li X, Yu B, Peng H. Protective effects of l-cysteine and N-acetyl-l-cysteine on boar sperm quality during hypothermic liquid storage with bovine serum albumin as a protectant. Theriogenology 2024; 216:185-195. [PMID: 38194754 DOI: 10.1016/j.theriogenology.2023.12.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/11/2024]
Abstract
Hypothermic liquid storage at 4-5 °C has emerged as a novel approach for preserving boar semen, offering innovative possibilities for semen preservation. However, this method also presents challenges, including cold shock and excessive reactive oxygen species (ROS) production. Therefore, reducing oxidative damage induced by low temperatures becomes essential while supplementing appropriate protectants. In this study, we investigated the efficacy of Bovine Serum Albumin (BSA) compared to Polyvinylpyrrolidone (PVP) and Skim Milk Powder (SMP) in maintaining boar sperm motility and progressive motility using computer-assisted sperm analysis (CASA). Among the tested concentrations, 4 g/L of BSA exhibited the best protective effect. Subsequently, we supplemented different concentrations of l-cysteine (LC) and N-acetyl-l-cysteine (NAC) as additives in the presence of BSA as a protectant. Our results demonstrated that 1 mmol/L of LC and 0.5 mmol/L of NAC exhibited superior protection of sperm quality compared to other concentrations. Furthermore, the 1 mmol/L LC and 0.5 mmol/L NAC groups showed significantly improved plasma membrane integrity and acrosome integrity compared to the control group. These groups also exhibited enhanced antioxidant capacity, evidenced by increased mitochondrial membrane potential (MMP), ATP production, total superoxide dismutase (T-SOD) activity, total antioxidant capacity (T-AOC), glutathione (GSH), glutathione peroxidase (GSH-PX), and GPX-4 levels. Additionally, they demonstrated decreased reactive oxygen species (ROS) and malondialdehyde (MDA) levels, as well as reduced oxidized glutathione (GSSG) and glutathione reductase (GR) levels. Furthermore, LC and NAC treatment enhanced AMP-activated protein kinase (AMPK) phosphorylation. However, inhibiting AMPK using compound C did not inhibit the protective effects of LC and NAC on low-temperature preserved boar sperm. These findings suggest that 4 g/L BSA can serve as an effective protectant for hypothermic liquid storage of boar semen. Additionally, LC and NAC supplementation reduces oxidative damage by enhancing antioxidant capacity rather than through AMPK-mediated ATP supplementation. These results contribute to advancing the application of LC and NAC in hypothermic liquid storage of boar semen.
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Affiliation(s)
- Diqi Yang
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, PR China
| | - Xiaomei Yu
- College of Animal Science, Fujian Agriculture and Forestry University, Fujian, Fuzhou, 350002, PR China
| | - Xiaoping Li
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, PR China
| | - Beibei Yu
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, PR China
| | - Hui Peng
- School of Tropical Agriculture and Forestry, Hainan University, Hainan, Haikou, 570228, PR China.
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