1
|
Lu J, Zhu T, Dai Y, Xing L, Jinqi L, Zhou S, Kong C. The effect of heat treatment on the lactosylation of milk proteins. J Dairy Sci 2023; 106:8321-8330. [PMID: 37641337 DOI: 10.3168/jds.2023-23526] [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: 03/22/2023] [Accepted: 05/22/2023] [Indexed: 08/31/2023]
Abstract
Protein lactosylation is a significant modification that occurs during the heat treatment of dairy products, causing changes in proteins' physical-chemical and nutritional properties. Knowledge of the detailed lactosylation information on milk proteins under various heat treatments is important for selecting appropriate thermo-processing and identifying markers to monitor heat load in dairy products. In the present study, we used proteomics techniques to investigate lactosylated proteins under different heating temperatures. We observed a total of 123 lactosylated lysines in 65 proteins, with lactosylation even occurring in raw milk. The number of lactosylated lysines and proteins increased moderately at 75°C to 130°C, but dramatically at 140°C. We found that 6 out of 10, 9 out of 16, 6 out of 12, and 5 out of 15 lysine residues in κ-casein, β-lactoglobulin, α-lactalbumin, and αS1-casein, respectively, were lactosylated under the applied heating treatment. Moreover, different lactosylation states of individual lysines and proteins can indicate the intensity of heating processes. Lactosylation of K14 in β-lactoglobulin could distinguish pasteurized and UHT milk, while lactosylation of lactotransferrin can reflect moderate heat treatment of products.
Collapse
Affiliation(s)
- Jing Lu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China.
| | - Tong Zhu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Ying Dai
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Lina Xing
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Liu Jinqi
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Sumei Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Chunli Kong
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| |
Collapse
|
2
|
Babaker MA, Aljoud FA, Alkhilaiwi F, Algarni A, Ahmed A, Khan MI, Saadeldin IM, Alzahrani FA. The Therapeutic Potential of Milk Extracellular Vesicles on Colorectal Cancer. Int J Mol Sci 2022; 23:ijms23126812. [PMID: 35743255 PMCID: PMC9224713 DOI: 10.3390/ijms23126812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/16/2022] [Accepted: 06/16/2022] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer remains one of the leading prevalent cancers in the world and is the fourth most common cause of death from cancer. Unfortunately, the currently utilized chemotherapies fail in selectively targeting cancer cells and cause harm to healthy cells, which results in profound side effects. Researchers are focused on developing anti-cancer targeted medications, which is essential to making them safer, more effective, and more selective and to maximizing their therapeutic benefits. Milk-derived extracellular vesicles (EVs) from camels and cows have attracted much attention as a natural substitute product that effectively suppresses a wide range of tumor cells. This review sheds light on the biogenesis, methods of isolation, characterization, and molecular composition of milk EVs as well as the therapeutic potentials of milk EVs on colorectal cancer.
Collapse
Affiliation(s)
- Manal A. Babaker
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Department of Chemistry, Faculty of Science, Majmaah University, Al Majmaah 11952, Saudi Arabia
| | - Fadwa A. Aljoud
- Regenerative Medicine Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (F.A.A.); (F.A.)
| | - Faris Alkhilaiwi
- Regenerative Medicine Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (F.A.A.); (F.A.)
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Abdulrahman Algarni
- Department of Medical Laboratory Technology, College of Applied Medical Sciences, Northern Border University, Arar 73221, Saudi Arabia;
| | - Asif Ahmed
- MirZyme Therapeutics, Innovation Birmingham Campus, Faraday Wharf, Birmingham B7 4BB, UK;
- School of Health Sciences, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Mohammad Imran Khan
- Centre of Artificial Intelligence in Precision Medicines (CAIPM), King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Islam M. Saadeldin
- Research Institute of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
- Correspondence: (I.M.S.); (F.A.A.)
| | - Faisal A. Alzahrani
- MirZyme Therapeutics, Innovation Birmingham Campus, Faraday Wharf, Birmingham B7 4BB, UK;
- Centre of Artificial Intelligence in Precision Medicines (CAIPM), King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Embryonic Stem Cells Unit, Department of Biochemistry, Faculty of Science, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Correspondence: (I.M.S.); (F.A.A.)
| |
Collapse
|
3
|
Dai W, White R, Liu J, Liu H. Organelles coordinate milk production and secretion during lactation: Insights into mammary pathologies. Prog Lipid Res 2022; 86:101159. [PMID: 35276245 DOI: 10.1016/j.plipres.2022.101159] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 02/21/2022] [Accepted: 03/03/2022] [Indexed: 12/15/2022]
Abstract
The mammary gland undergoes a spectacular series of changes during its development and maintains a remarkable capacity to remodel and regenerate during progression through the lactation cycle. This flexibility of the mammary gland requires coordination of multiple processes including cell proliferation, differentiation, regeneration, stress response, immune activity, and metabolic changes under the control of diverse cellular and hormonal signaling pathways. The lactating mammary epithelium orchestrates synthesis and apical secretion of macromolecules including milk lipids, milk proteins, and lactose as well as other minor nutrients that constitute milk. Knowledge about the subcellular compartmentalization of these metabolic and signaling events, as they relate to milk production and secretion during lactation, is expanding. Here we review how major organelles (endoplasmic reticulum, Golgi apparatus, mitochondrion, lysosome, and exosome) within mammary epithelial cells collaborate to initiate, mediate, and maintain lactation, and how study of these organelles provides insight into options to maintain mammary/breast health.
Collapse
Affiliation(s)
- Wenting Dai
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Robin White
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA 24060, USA
| | - Jianxin Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Hongyun Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, China.
| |
Collapse
|
4
|
First Insight into the Variation of the Milk Serum Proteome within and between Individual Cows. DAIRY 2022. [DOI: 10.3390/dairy3010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Milk contains all nutrients needed for development of calves. One important group of components responsible for this are the milk proteins. Variation due to feed or animal health, has been studied for the most abundant milk proteins. The aim of this study was to determine the variation between and within cows for their milk serum proteome. Sample Set 1 was collected from Holstein Friesian (HF) cows between November 2011 and March 2012 and prepared using filter aided sample preparation (FASP) followed by LC-MS/MS for protein identification and quantification. The results showed that the milk serum proteome was very constant in mid lactation (four cows at five time points, p > 0.05) between 3 and 6 months in lactation. Sample Set 2 was collected from HF cows in Dec 2012 and analyzed using FASP and dimethyl labeling followed by LC-MS/MS. Significant variation in the milk serum proteome (p < 0.05) between 17 individual cows was found in Sample Set 2. The most variable proteins were immune-related proteins, which may reflect the health status of the individual cow. On the other hand, proteins related to nutrient synthesis and transport were relatively constant, indicating the importance of milk in providing a stable supply of nutrients to the neonate. In conclusion, the milk serum proteome was stable over mid lactation, but differed significantly between individuals, especially in immune-related proteins.
Collapse
|
5
|
Yu X, Fang C, Liu L, Zhao X, Liu W, Cao H, Lv S. Transcriptome study underling difference of milk yield during peak lactation of Kazakh horse. J Equine Vet Sci 2021; 102:103424. [PMID: 34119198 DOI: 10.1016/j.jevs.2021.103424] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 02/15/2021] [Accepted: 02/15/2021] [Indexed: 01/10/2023]
Abstract
This study was designed to provide a basis for further understanding of the mechanism of lactation based on mRNA expression differences in milk fat between different milk yields in Kazakh horses. Total RNA was extracted from the milk fat during the peak of lactation period. A total of 310 differentially expressed genes (DEGs) were identified by comparative transcriptome analysis of the high-yield and low-yield group. These DEGs regulate lactation by participated in AMPK signaling pathway, FoxO signaling pathway, ErbB signaling pathway, VEGF signaling pathway. In addition, we performed quantitative PCR to validated 5 selected DEGs and the results were in agreement with RNA-seq analysis. A new profile has been established for revealing the mechanism of equid's mammalian lactation.
Collapse
Affiliation(s)
- Xi Yu
- Xinjiang Agricultural University, Urumuqi, China
| | | | - Lingling Liu
- Xinjiang Agricultural University, Urumuqi, China
| | | | - Wujun Liu
- Xinjiang Agricultural University, Urumuqi, China.
| | - Hang Cao
- Xinjiang Agricultural University, Urumuqi, China
| | - Shipeng Lv
- Xinjiang Agricultural University, Urumuqi, China
| |
Collapse
|
6
|
Ma Y, Hou Y, Han B, Xie K, Zhang L, Zhou P. Peptidome comparison following gastrointestinal digesta of bovine versus caprine milk serum. J Dairy Sci 2020; 104:47-60. [PMID: 33162096 DOI: 10.3168/jds.2020-18471] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 08/23/2020] [Indexed: 12/31/2022]
Abstract
Infant formula is used as a supplement for newborns. Although bovine milk-based infant formulas dominate the market, caprine milk-based infant formula has attracted increasing attention because of its lower allergenicity. This study compared the digestive peptidome of bovine and caprine milk serum proteins by using in vitro infant simulating conditions. The result showed that the degradation pattern of milk proteins was similar, whereas the digestive rates of milk proteins differed between bovine and caprine milks. Several proteins, such as α-lactalbumin (LALBA), β-lactoglobulin (LGB), serum amyloid A protein (SAA1), glycosylation-dependent cell adhesion molecule 1 (GLYCAM1), and lactotransferrin (LTF), released more peptides during digestion of caprine milk serum than during digestion of bovine milk serum; however, more peptides derived from αS1-casein (CSN1S1) were found in bovine digesta. In addition, antimicrobial-related peptides were mostly only found in caprine intestinal digesta. The results of this study may be useful in understanding the digestion characteristics of milk serum proteins and providing guidance on the improvement of infant formula.
Collapse
Affiliation(s)
- Ying Ma
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yanmei Hou
- Ausnutria Hyproca Nutrition Co. Ltd., Changsha 410011, China
| | - Binsong Han
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Kui Xie
- Ausnutria Hyproca Nutrition Co. Ltd., Changsha 410011, China
| | - Lina Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Peng Zhou
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| |
Collapse
|
7
|
Sun Y, Wang C, Sun X, Guo M. Protein digestion properties of Xinong Saanen goat colostrum and mature milk using in vitro digestion model. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:5819-5825. [PMID: 31180140 DOI: 10.1002/jsfa.9852] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 06/06/2019] [Accepted: 06/06/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Xinong Saanen goat milk is a raw material for goat milk-based infant formula production. This study aims to analyze digestion properties of Xinong Saanen goat colostrum and mature milk by simulating infant gastrointestinal digestion. Zeta potential, particles size, protein profile and peptides composition of these two kinds of milk during the digestion process were studied. RESULTS Zeta-potential values of the digested colostrum were lower than those of mature milk through the whole digestion. Absolute zeta potential of colostrum duodenal digestion samples showed a decrease from 16.63 ± 2.08 to 11.80 ± 2.03 mV while that of mature milk decreased sharply and then increased (P < 0.05). Colostrum had a larger particle size than mature milk and both milks showed decreased particle size with increasing digestion time but an increase for the last 30 min. Colostrum showed more high molecular weight (MW) proteins which cannot be hydrolyzed completely compared with mature milk. Digested peptides (< 10 kDa) were characterized using liquid chromatography combined with tandem mass spectrometry (LC-MS/MS). The casein-derived peptides identified in digested colostrum and mature milk accounted for 76.67% and 59.53%, respectively. β-Casein was the most abundant in colostrum while that in mature milk was αs1 -casein. Enterotoxin-binding glycoprotein PP20K, butyrophilin subfamily 1 member A1 (BTN1A1) and perilipin (PLIN) were only detected in digested mature milk. CONCLUSION Differences in digestion properties between goat colostrum and mature milk were mainly shown in duodenal digestion phase. Data may provide useful information about utilization of goat milk for infant formula formulation. © 2019 Society of Chemical Industry.
Collapse
Affiliation(s)
- Yuxue Sun
- Department of Food Science, College of Food Science and Engineering, Jilin University, Jilin, China
| | - Cuina Wang
- Department of Food Science, College of Food Science and Engineering, Jilin University, Jilin, China
| | - Xiaomeng Sun
- Department of Food Science, College of Food Science and Engineering, Jilin University, Jilin, China
| | - Mingruo Guo
- Department of Nutrition and Food Sciences, College of Agriculture and Life Sciences, University of Vermont, Burlington, VT, USA
- College of Food Science, Northeast Agricultural University, Harbin, China
| |
Collapse
|
8
|
Zhang L, Ma Y, Yang Z, Jiang S, Liu J, Hettinga KA, Lai J, Zhou P. Geography and ethnicity related variation in the Chinese human milk serum proteome. Food Funct 2019; 10:7818-7827. [DOI: 10.1039/c9fo01591d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Human milk provides a range of nutrients and bioactive components, which can support the growth and development of infants.
Collapse
Affiliation(s)
- Lina Zhang
- State Key Laboratory of Food Science & Technology
- Jiangnan University
- Wuxi
- China
| | - Ying Ma
- State Key Laboratory of Food Science & Technology
- Jiangnan University
- Wuxi
- China
| | - Zhenyu Yang
- National Institute for Nutrition and Health
- Chinese Center for Disease Control and Prevention
- Beijing
- China
| | - Shan Jiang
- National Institute for Nutrition and Health
- Chinese Center for Disease Control and Prevention
- Beijing
- China
| | - Jun Liu
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University
- Wuxi
- China
| | - Kasper A. Hettinga
- Food Quality and Design Group
- Wageningen University & Research
- Wageningen
- The Netherlands
| | - Jianqiang Lai
- National Institute for Nutrition and Health
- Chinese Center for Disease Control and Prevention
- Beijing
- China
| | - Peng Zhou
- State Key Laboratory of Food Science & Technology
- Jiangnan University
- Wuxi
- China
- International Joint Research Laboratory for Functional Dairy Protein Ingredients
| |
Collapse
|
9
|
Zhang L, van Dijk ADJ, Hettinga K. An interactomics overview of the human and bovine milk proteome over lactation. Proteome Sci 2017; 15:1. [PMID: 28149201 PMCID: PMC5267443 DOI: 10.1186/s12953-016-0110-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 12/20/2016] [Indexed: 01/07/2023] Open
Abstract
Background Milk is the most important food for growth and development of the neonate, because of its nutrient composition and presence of many bioactive proteins. Differences between human and bovine milk in low abundant proteins have not been extensively studied. To better understand the differences between human and bovine milk, the qualitative and quantitative differences in the milk proteome as well as their changes over lactation were compared using both label-free and labelled proteomics techniques. These datasets were analysed and compared, to better understand the role of milk proteins in development of the newborn. Methods Human and bovine milk samples were prepared by using filter-aided sample preparation (FASP) combined with dimethyl labelling and analysed by nano LC LTQ-Orbitrap XL mass spectrometry. Results The human and bovine milk proteome show similarities with regard to the distribution over biological functions, especially the dominant presence of enzymes, transport and immune-related proteins. At a quantitative level, the human and bovine milk proteome differed not only between species but also over lactation within species. Dominant enzymes that differed between species were those assisting in nutrient digestion, with bile salt-activated lipase being abundant in human milk and pancreatic ribonuclease being abundant in bovine milk. As lactation advances, immune-related proteins decreased slower in human milk compared to bovine milk. Notwithstanding these quantitative differences, analysis of human and bovine co-expression networks and protein-protein interaction networks indicated that a subset of milk proteins displayed highly similar interactions in each of the different networks, which may be related to the general importance of milk in nutrition and healthy development of the newborn. Conclusions Our findings promote a better understanding of the differences and similarities in dynamics of human and bovine milk proteins, thereby also providing guidance for further improvement of infant formula. Electronic supplementary material The online version of this article (doi:10.1186/s12953-016-0110-0) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Lina Zhang
- Dairy Science and Technology, Food Quality and Design Group, Wageningen University, Postbox 8129, 6700EV Wageningen, The Netherlands
| | - Aalt D J van Dijk
- Biometris, Wageningen University and Research Centre, P.O. Box 16, 6700 AA Wageningen, The Netherlands.,Bioinformatics Group, Wageningen University, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands.,Bioscience, cluster Applied Bioinformatics, Wageningen University and Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - Kasper Hettinga
- Dairy Science and Technology, Food Quality and Design Group, Wageningen University, Postbox 8129, 6700EV Wageningen, The Netherlands
| |
Collapse
|
10
|
Comparative proteomics of milk fat globule membrane in goat colostrum and mature milk. Food Chem 2016; 209:10-6. [DOI: 10.1016/j.foodchem.2016.04.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 04/09/2016] [Accepted: 04/12/2016] [Indexed: 12/20/2022]
|
11
|
Verma A, Ambatipudi K. Challenges and opportunities of bovine milk analysis by mass spectrometry. Clin Proteomics 2016; 13:8. [PMID: 27095950 PMCID: PMC4836106 DOI: 10.1186/s12014-016-9110-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 03/18/2016] [Indexed: 12/11/2022] Open
Abstract
Bovine milk and its products (e.g. cheese, yoghurt) are an important part of human diet with beneficial effects for all ages. Although analyses of different milk components (e.g. proteins, lipids) pose huge challenges, the use of mass spectrometric (MS)-based techniques is steadily improving our understanding of the complexity of the biological traits that effect milk yield and its components to meet the global demand arising from population growth. In addition, different milk constituents have various applications in veterinary research and medicine, including early disease diagnosis. The aim of the review is to present an overview of the progress made in MS-based analysis of milk, and suggest a multi-pronged MS strategy to better explore different milk components for translational and clinical utilities.
Collapse
Affiliation(s)
- Aparna Verma
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| | - Kiran Ambatipudi
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667 India
| |
Collapse
|
12
|
Proteomic study on the stability of proteins in bovine, camel, and caprine milk sera after processing. Food Res Int 2016. [DOI: 10.1016/j.foodres.2016.01.023] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
13
|
Milk fat globule is an alternative to mammary epithelial cells for gene expression analysis in buffalo. J DAIRY RES 2016; 83:202-8. [PMID: 27032540 DOI: 10.1017/s0022029916000133] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Owing to the difficulty in obtaining mammary gland tissue from lactating animals, it is difficult to test the expression levels of genes in mammary gland. The aim of the current study was to identify if milk fat globule (MFG) in buffalo milk was an alternative to mammary gland (MG) and milk somatic cell (MSC) for gene expression analysis. Six buffalos in late lactation were selected to collect MFG and MSC, and then MG was obtained by surgery. MFG was stained with acridine orange to successfully visualise RNA and several cytoplasmic crescents in MFG. The total RNA in MFG was successfully isolated and the integrity was assessed by agarose gel electrophoresis. We analysed the cellular components in MFG, MG and MSC through testing the expression of cell-specific genes by qRT-PCR. The results showed that adipocyte-specific gene (AdipoQ) and leucocyte-specific genes (CD43, CSF1 and IL1α) in MFG were not detected, whereas epithelial cell marker genes (Keratin 8 and Keratin 18) in MFG were higher than in MSC and lower than in MG, fibroblast marker gene (vimentin) in MFG was significantly lower than in MG and MSC, milk protein genes (LALBA, BLG and CSN2) and milk fat synthesis-related genes (ACC, BTN1A1, FABP3 and FAS) in MFG were higher than in MG and MSC. In conclusion, the total RNA in MFG mainly derives from mammary epithelial cells and can be used to study the functional gene expression of mammary epithelial cells.
Collapse
|
14
|
The evolution of analytical chemistry methods in foodomics. J Chromatogr A 2016; 1428:3-15. [DOI: 10.1016/j.chroma.2015.09.007] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/26/2015] [Accepted: 09/02/2015] [Indexed: 12/18/2022]
|
15
|
Lu J, Wang X, Zhang W, Liu L, Pang X, Zhang S, Lv J. Comparative proteomics of milk fat globule membrane in different species reveals variations in lactation and nutrition. Food Chem 2015; 196:665-72. [PMID: 26593540 DOI: 10.1016/j.foodchem.2015.10.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/29/2015] [Accepted: 10/01/2015] [Indexed: 10/23/2022]
Abstract
In present study, 312, 554, 175 and 143 proteins were identified and quantified by label-free quantitative proteomics in human, cow, goat and yak milk fat globule membrane (MFGM), respectively. Fifty proteins involved in vesicle mediate transport and milk fat globule secretion were conserved among species. Moreover, proteins involved in lipid synthesis and secretion (xanthine dehydrogenase/oxidase, stomatin and CD36), showed different expression pattern and the host defense proteins exhibited various profiles within species. Notably, the content and activity of lipid catabolic enzymes were significantly higher in human MFGM, which could be indicative of the superior fat utilization in breast fed infants. Our findings unraveled the significant differences in protein composition of human milk and conventionally used substitutes of it. The in-depth study of lipid metabolic enzymes in human MFGM will probably contribute to the improvement of the fat utilization through modulation of lipid catabolic enzymes in infant formula.
Collapse
Affiliation(s)
- Jing Lu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xinyu Wang
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, China; Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Weiqing Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lu Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaoyang Pang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shuwen Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jiaping Lv
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China.
| |
Collapse
|
16
|
Shi HB, Yu K, Luo J, Li J, Tian HB, Zhu JJ, Sun YT, Yao DW, Xu HF, Shi HP, Loor JJ. Adipocyte differentiation-related protein promotes lipid accumulation in goat mammary epithelial cells. J Dairy Sci 2015; 98:6954-64. [PMID: 26298750 DOI: 10.3168/jds.2015-9452] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 05/21/2015] [Indexed: 12/16/2022]
Abstract
Milk fat originates from the secretion of cytosolic lipid droplets (CLD) synthesized within mammary epithelial cells. Adipocyte differentiation-related protein (ADRP; gene symbol PLIN2) is a CLD-binding protein that is crucial for synthesis of mature CLD. Our hypothesis was that ADRP regulates CLD production and metabolism in goat mammary epithelial cells (GMEC) and thus plays a role in determining milk fat content. To understand the role of ADRP in ruminant milk fat metabolism, ADRP (PLIN2) was overexpressed or knocked down in GMEC using an adenovirus system. Immunocytochemical staining revealed that ADRP localized to the surface of CLD. Supplementation with oleic acid (OA) enhanced its colocalization with CLD surface and enhanced lipid accumulation. Overexpression of ADRP increased lipid accumulation and the concentration of triacylglycerol in GMEC. In contrast, morphological examination revealed that knockdown of ADRP decreased lipid accumulation even when OA was supplemented. This response was confirmed by the reduction in mass of cellular TG when ADRP was knocked down. The fact that knockdown of ADRP did not completely eliminate lipid accumulation at a morphological level in GMEC without OA suggests that some other compensatory factors may also aid in the process of CLD formation. The ADRP reversed the decrease of CLD accumulation induced by adipose triglyceride lipase. This is highly suggestive of ADRP promoting triacylglycerol stability within CLD by preventing access to adipose triglyceride lipase. Collectively, these data provide direct in vitro evidence that ADRP plays a key role in CLD formation and stability in GMEC.
Collapse
Affiliation(s)
- H B Shi
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100; College of Life Science, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, P. R. China 310018
| | - K Yu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - J Luo
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100.
| | - J Li
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - H B Tian
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - J J Zhu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - Y T Sun
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - D W Yao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - H F Xu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - H P Shi
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P.R. China 712100
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
| |
Collapse
|
17
|
Genes regulating lipid and protein metabolism are highly expressed in mammary gland of lactating dairy goats. Funct Integr Genomics 2014; 15:309-21. [PMID: 25433708 DOI: 10.1007/s10142-014-0420-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 11/17/2014] [Accepted: 11/20/2014] [Indexed: 10/24/2022]
Abstract
Dairy goats serve as an important source of milk and also fulfill agricultural and economic roles in developing countries. Understanding the genetic background of goat mammary gland is important for research on the regulatory mechanisms controlling tissue function and the synthesis of milk components. We collected tissue at four different stages of goat mammary gland development and generated approximately 25 GB of data from Illumina de novo RNA sequencing. The combined reads were assembled into 51,361 unigenes, and approximately 60.07 % of the unigenes had homology to other proteins in the NCBI non-redundant protein database (NR). Functional classification through eukaryotic Ortholog Groups of Protein (KOG), gene ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) revealed that the unigenes from goat mammary glands are involved in a wide range of biological processes and metabolic pathways, including lipid metabolism and lactose metabolism. The results of qPCR revealed that genes encoding FABP3, FASN, SCD, PLIN2, whey proteins (LALBA and BLG), and caseins (CSN1S1, CSN1S2, CSN2 and CSN3) at 100 and 310 days postpartum increased significantly compared with the non-lactating period. In addition to their role in lipid and protein synthesis, the higher expression at 310 days postpartum could contribute to mammary cell turnover during pregnancy. In conclusion, this is the first study to characterize the complete transcriptome of goat mammary glands and constitutes a comprehensive genomic resource available for further studies of ruminant lactation.
Collapse
|