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Zhao YQ, Li ZP, Dong SC, Wang H, Zhao YM, Dong LY, Zhao ZY, Wang XH. Preparation of micron-sized benzamidine-modified magnetic agarose beads for trypsin purification from fish viscera. Talanta 2024; 280:126745. [PMID: 39180874 DOI: 10.1016/j.talanta.2024.126745] [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: 02/05/2024] [Revised: 07/09/2024] [Accepted: 08/21/2024] [Indexed: 08/27/2024]
Abstract
The effective method for trypsin purification should be established because trypsin has important economic value. In this work, a novel and simple strategy was proposed for fabricating micron-sized magnetic Fe3O4@agarose-benzamidine beads (MABB) with benzamidine as a ligand, which can efficiently and selectively capture trypsin. The micro-sized MABB, with clear spherical core-shell structure and average particle size of 6.6 μm, showed excellent suspension ability and magnetic responsiveness in aqueous solution. The adsorption capacity and selectivity of MABB towards target trypsin were significantly better than those of non-target lysozyme. According to the Langmuir equation, the maximum adsorption capacity of MABB for trypsin was 1946 mg g-1 at 25 °C, and the adsorption should be a physical sorption process. Furthermore, the initial adsorption rate and half equilibrium time of MABB toward trypsin were 787.4 mg g-1 min-1 and 0.71 min, respectively. To prove the practicability, MABB-based magnetic solid-phase extraction (MSPE) was proposed, and the related parameters were optimized in detail to improve the purification efficiency. With Tris-HCl buffer (50 mM, 10 mM CaCl2, pH 8.0) as extraction buffer, Tris-HCl buffer (50 mM, 100 mM CaCl2, pH 8.0) as rinsing buffer, acidic eluent (0.01 M HCl, 0.5 M NaCl, pH 2.0) as eluent buffer and alkaline buffer (1 M Tris-HCl buffer, pH 10.0) as neutralization solution, the MABB-based MSPE was successfully used for trypsin purification from the viscera of grass carp (Ctenopharyngodon idella). The molecular weight of purified trypsin was determined as approximate 23 kDa through sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The purified trypsin was highly active from 30 °C to 60 °C, with an optimum temperature of 50 °C, and was tolerant to pH variation, exhibiting 85 % of maximum enzyme activity from pH 7.0 to 10.0. The results demonstrated that the proposed MABB-based MSPE could effectively purify trypsin and ensure the biological activity of purified trypsin. Therefore, we believe that the novel MABB could be applicable for efficient purification of trypsin from complex biological systems.
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Affiliation(s)
- Ya-Qi Zhao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China; NHC Key Laboratory of Hormones and Development / Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital / Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Zhi-Peng Li
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Shi-Chao Dong
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Hao Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Yi-Mei Zhao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China; NHC Key Laboratory of Hormones and Development / Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital / Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China
| | - Lin-Yi Dong
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China.
| | - Zhen-Yu Zhao
- NHC Key Laboratory of Hormones and Development / Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital / Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China.
| | - Xian-Hua Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China.
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Wu N, Wen H, Xu P, Chen J, Xue M, Li J, Wang M, Song C, Li H. PPAR Signaling Maintains Metabolic Homeostasis under Hypothermia in Freshwater Drum ( Aplodinotus grunniens). Metabolites 2023; 13:102. [PMID: 36677027 PMCID: PMC9865675 DOI: 10.3390/metabo13010102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/02/2023] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Aplodinotus grunniens, known as freshwater drum, is a kind of eurythermal freshwater fish that is widely distributed in North America. In 2019, our research group reached a milestone on its artificial breeding and cultivation and have investigated its physiological adaption to the environment, providing a breakthrough and prospects for aquaculture. However, its adaptability and metabolic homeostasis to hypothermia is not fully understood. In this experiment, cold stress was conducted at 18 °C (LT18) and 10 °C (LT10) with 25 °C as control (Con) for 8 days to explore the effects of short-term hypothermia on the physiology and metabolism of freshwater drum. From the results, the level of free essential amino acids in LT18 and LT10 decreased significantly after 2 days cold stress compared with Con. Furthermore, plasma total triglyceride (TG) content and lipase (LPS) activity were decreased at LT10 for 2d. With RNA-seq in the liver, metabolic-related signaling, especially amino acid synthesis and lipid metabolism, was inhibited by hypothermia. Specifically, the PPAR signaling pathway is correlated with the inhibition of lipid and amino acid metabolism induced by hypothermia. These data confirmed that PPAR signaling maintains lipid and amino acid metabolic homeostasis during cold stress. These results give a theoretical foundation for hypothermia resistance in the area of metabolic homeostasis for freshwater drum.
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Affiliation(s)
- Ningyuan Wu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, No. 9 Shanshui East Road, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Haibo Wen
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, No. 9 Shanshui East Road, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Pao Xu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, No. 9 Shanshui East Road, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Jianxiang Chen
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Miaomiao Xue
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Jianlin Li
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, No. 9 Shanshui East Road, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Meiyao Wang
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, No. 9 Shanshui East Road, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Changyou Song
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, No. 9 Shanshui East Road, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
| | - Hongxia Li
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, No. 9 Shanshui East Road, Wuxi 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
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Frolova TV, Izvekova GI. A Comparative Analysis of the Effect of Intestinal Cestodes in Different Fish Species on Proteolytic Enzyme Activity. J EVOL BIOCHEM PHYS+ 2022. [DOI: 10.1134/s0022093022030024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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