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Stastna M. Advances in separation and identification of biologically important milk proteins and peptides. Electrophoresis 2024; 45:101-119. [PMID: 37289082 DOI: 10.1002/elps.202300084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/30/2023] [Accepted: 05/30/2023] [Indexed: 06/09/2023]
Abstract
Milk is a rich source of biologically important proteins and peptides. In addition, milk contains a variety of extracellular vesicles (EVs), including exosomes, that carry their own proteome cargo. EVs are essential for cell-cell communication and modulation of biological processes. They act as nature carriers of bioactive proteins/peptides in targeted delivery during various physiological and pathological conditions. Identification of the proteins and protein-derived peptides in milk and EVs and recognition of their biological activities and functions had a tremendous impact on food industry, medicine research, and clinical applications. Advanced separation methods, mass spectrometry (MS)-based proteomic approaches and innovative biostatistical procedures allowed for characterization of milk protein isoforms, genetic/splice variants, posttranslational modifications and their key roles, and contributed to novel discoveries. This review article discusses recently published developments in separation and identification of bioactive proteins/peptides from milk and milk EVs, including MS-based proteomic approaches.
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Affiliation(s)
- Miroslava Stastna
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Brno, Czech Republic
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Zhu J, Wang J, Zhong H, Hu Y, Hu L, Rao P, Liu R, Zhu J, Li G. New method for measuring the pore sizes and pore size distributions of filter membranes-the fluorescence probe method. Mikrochim Acta 2023; 190:469. [PMID: 37971627 DOI: 10.1007/s00604-023-06043-z] [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: 08/31/2023] [Accepted: 10/26/2023] [Indexed: 11/19/2023]
Abstract
A novel, simple, and rapid method is demonstrated for measuring the pore size and pore size distribution of filtration membranes (FMs) used in aqueous applications with fluorescence probes. Because the selected fluorescent probes are mixable and have strong signals, combined with the operation of dead-end filtration, this method only requires small amounts of reagents; additionally, it is time-efficient by avoiding multiple rounds of filtration. This method detects the size of a FM pore throat (i.e., the narrowest position of a pore tunnel), which is more consistent with the actual filtration situation. The conditions, such as probe concentration, temperature, transmembrane pressure difference, and types of surfactants, have been optimized. The experimental results show that the fluorescence probe method has good accuracy and reproducibility for measuring the pore size and pore size distribution of both organic and inorganic FMs. The method is particularly suitable for rapid testing of the filtration performance (nominal pore size≥0.02 μm) of purchased or synthetic membranes in the laboratory.
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Affiliation(s)
- Jiaying Zhu
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
- Petroleum and Chemical Industry Key Laboratory of Silicon Carbide Ceramic Membrane, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
| | - Jinjie Wang
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China.
- Petroleum and Chemical Industry Key Laboratory of Silicon Carbide Ceramic Membrane, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China.
| | - Hui Zhong
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
- Petroleum and Chemical Industry Key Laboratory of Silicon Carbide Ceramic Membrane, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
| | - Yue Hu
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
- Petroleum and Chemical Industry Key Laboratory of Silicon Carbide Ceramic Membrane, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
| | - Liqun Hu
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
- Petroleum and Chemical Industry Key Laboratory of Silicon Carbide Ceramic Membrane, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
| | - Pinhua Rao
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
| | - Rui Liu
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
- Petroleum and Chemical Industry Key Laboratory of Silicon Carbide Ceramic Membrane, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China
| | - Jun Zhu
- National Engineering Research Center for Nanotechnology, 28 East Jiangchuan Road, Shanghai, 200241, People's Republic of China
| | - Guanghui Li
- School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China.
- Petroleum and Chemical Industry Key Laboratory of Silicon Carbide Ceramic Membrane, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620, People's Republic of China.
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Sergius-Ronot M, Suwal S, Pitino MA, Shama S, Unger S, O'Connor DL, Pouliot Y, Doyen A. Development of a human milk protein concentrate from donor milk: Impact of the pasteurization method on static in vitro digestion in a preterm newborn model. Food Res Int 2023; 164:112385. [PMID: 36737969 DOI: 10.1016/j.foodres.2022.112385] [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: 09/16/2022] [Revised: 12/08/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022]
Abstract
The impact of high temperature short time (HTST, 72 °C, 15 s), Holder pasteurization- (63 °C, 30 min) and high hydrostatic pressure (HHP, 600 MPa-10 min) was evaluated on the digestibility of human milk protein concentrate (HMPC) by using a static in vitro gastrointestinal digestion system. The results showed that the processing steps used to produce the HMPC induced a decrease in readily available nitrogen (non-protein nitrogen and peptides). Overall, digestibility was similar between pasteurized and raw HMPC (degree of hydrolysis ranged from 26 to 34 %). Lactoferrin was more susceptible to gastric and intestinal digestion after thermal pasteurization. Additionally, the resistance of β-casein to digestion increased after HHP and Holder pasteurization due to aggregation and changes in protein structure. During intestinal digestion, Holder pasteurization induced a higher release of arginine, phenylalanine and tyrosine from HMPC compared to raw and HHP-treated HMPC. Overall, protein structural changes induced by human milk (HM) processing (freeze-thawing and filtration) and pasteurization treatments affected HMPC proteolysis during in vitro digestion. However, protein digestion behaviors were quite similar for raw and HHP-treated HMPC compared to the thermal-treated HMPC, with no effect on lactoferrin digestion. Consequently, pasteurization of HMPC by HHP represents an interesting non-thermal process that preserves the HM bioactive proteins during digestion.
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Affiliation(s)
- Mélanie Sergius-Ronot
- Departement of Food Science, Institute for Nutrition and Functional Foods (INAF) and Dairy Research Centre (STELA), Laval University, Quebec, Canada
| | - Shyam Suwal
- Arla Foods Amba, Agro Food Park 19, Aarhus 8200, Denmark
| | - Michael A Pitino
- Department of Nutritional Sciences, University of Toronto, Toronto, Canada; Translational Medicine Program, The Hospital for Sick Children, Toronto, Canada
| | - Sara Shama
- Department of Nutritional Sciences, University of Toronto, Toronto, Canada; Translational Medicine Program, The Hospital for Sick Children, Toronto, Canada
| | - Sharon Unger
- Department of Nutritional Sciences, University of Toronto, Toronto, Canada; Department of Pediatrics, University of Toronto, Toronto, Canada; Department of Neonatology, The Hospital for Sick Children, Toronto, Canada; Department of Pediatrics, Mount Sinai Hospital, Toronto, Canada; Rogers Hixon Ontario Human Milk Bank, Mount Sinai Hospital, Toronto, Canada
| | - Deborah L O'Connor
- Department of Nutritional Sciences, University of Toronto, Toronto, Canada; Translational Medicine Program, The Hospital for Sick Children, Toronto, Canada; Department of Pediatrics, Mount Sinai Hospital, Toronto, Canada; Rogers Hixon Ontario Human Milk Bank, Mount Sinai Hospital, Toronto, Canada
| | - Yves Pouliot
- Departement of Food Science, Institute for Nutrition and Functional Foods (INAF) and Dairy Research Centre (STELA), Laval University, Quebec, Canada
| | - Alain Doyen
- Departement of Food Science, Institute for Nutrition and Functional Foods (INAF) and Dairy Research Centre (STELA), Laval University, Quebec, Canada.
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Gharbi N, Marciniak A, Perreault V, Stone D, Fittipaldi N, Unger S, O'Connor DL, Pouliot Y, Doyen A. The effect of pasteurization treatment and skimming conditions on human milk proteins. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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