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Li W, Zeng W, Zhang Y, Ma Z, Fang X, Han Y, Sun Y, Jin X, Ma L. A comparative metabolomics analysis of domestic yak ( Bos grunniens) milk with human breast milk. Front Vet Sci 2023; 10:1207950. [PMID: 37841471 PMCID: PMC10570732 DOI: 10.3389/fvets.2023.1207950] [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: 04/18/2023] [Accepted: 09/08/2023] [Indexed: 10/17/2023] Open
Abstract
Yaks are tough animals living in Tibet's hypoxic stress environment. However, the metabolite composition of yak milk and its role in hypoxic stress tolerance remains largely unexplored. The similarities and differences between yak and human milk in hypoxic stress tolerance are also unclear. This study explored yak colostrum (YC) and yak mature milk (YMM) using GC-MS, and 354 metabolites were identified in yak milk. A comparative metabolomic analysis of yak and human milk metabolites showed that over 70% of metabolites were species-specific. Yak milk relies mainly on essential amino acids- arginine and essential branched-chain amino acids (BCAAs): L-isoleucine, L-leucine, and L-valine tolerate hypoxic stress. To slow hypoxic stress, human breast milk relies primarily on the neuroprotective effects of non-essential amino acids or derivates, such as citrulline, sarcosine, and creatine. In addition, metabolites related to hypoxic stress were significantly enriched in YC than in YMM. These results reveal the unique metabolite composition of yak and human milk and provide practical information for applying yak and human milk to hypoxic stress tolerance.
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Affiliation(s)
- Wenhao Li
- Institute of Animal Husbandry and Veterinary Science, Qinghai University, Xining, China
| | - Weike Zeng
- Center for Genomics, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Fujian Agriculture and Forestry University, Fuzhou, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yanping Zhang
- Institute of Animal Husbandry and Veterinary Science, Qinghai University, Xining, China
| | - Zhijie Ma
- Institute of Animal Husbandry and Veterinary Science, Qinghai University, Xining, China
| | - Xingyan Fang
- Center for Genomics, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Fujian Agriculture and Forestry University, Fuzhou, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yingcang Han
- Institute of Animal Husbandry and Veterinary Science, Qinghai University, Xining, China
| | - Yonggang Sun
- Institute of Animal Husbandry and Veterinary Science, Qinghai University, Xining, China
| | - Xiayang Jin
- Institute of Animal Husbandry and Veterinary Science, Qinghai University, Xining, China
| | - Liuyin Ma
- Center for Genomics, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Fujian Agriculture and Forestry University, Fuzhou, China
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Ning J, Li M, Chen W, Yang M, Chen J, Luo X, Yue X. Characterization and biological function analysis of endogenous peptides derived from donkey colostrum proteins. Food Funct 2023; 14:8261-8275. [PMID: 37602399 DOI: 10.1039/d3fo01703f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
Donkey colostrum, due to its abundance of active ingredients, including lysozyme, proteins, and peptides, is essential for the growth and immune defence of newborns. However, research on endogenous peptides in donkey colostrum is inadequate. This study analysed the profiles of endogenous peptides, their potential bioactivity, and the enzymes that generated these peptides using two different strategies. A total of 6202 endogenous peptides were characterised through a database search, while an additional 2997 peptides were identified de novo. Among the 1142 proteins identified, trypsin and plasmin demonstrated the highest bioactivities. Furthermore, a bioinformatics-based screening identified antioxidant peptides, angiotensin I-converting enzyme inhibitory peptides, and dipeptidyl peptidase IV inhibitory peptides as the three most active peptides. Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses were conducted. These findings enhance our knowledge of endogenous peptides in donkey colostrum and provide crucial information regarding these peptides as nutritional factors for the future development of functional foods derived from donkey sources.
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Affiliation(s)
- Jianting Ning
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Mohan Li
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Weiyan Chen
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Mei Yang
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Jiali Chen
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Xue Luo
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Xiqing Yue
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
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Differentially expressed whey proteins of donkey and bovine colostrum revealed with a label-free proteomics approach. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yue Y, Li L, Tong M, Li S, Zhao Y, Guo X, Guo Y, Shi B, Yan S. Effect of Varying Dietary Crude Protein Level on Milk Production, Nutrient Digestibility, and Serum Metabolites by Lactating Donkeys. Animals (Basel) 2022; 12:ani12162066. [PMID: 36009654 PMCID: PMC9405379 DOI: 10.3390/ani12162066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Donkey milk, a functional food, can be used as a milk replacement for newborn nutrition, due to its similar chemical composition to maternal breast milk and hypoallergenic property, and may be useful in the prevention of hypercholesterolemia and atherosclerosis. However, donkey milk yield is very low and cannot satisfy the demands of the market. Some research on dairy cows showed that increasing dietary crude protein levels can increase milk yield and milk component yields. Therefore, this study explored whether increasing dietary crude protein levels could promote the milk production of lactating donkeys. The results showed that increasing crude protein levels could improve milk performance and nutrient digestibility of lactating donkeys. The key finding of this study was that a diet containing 14.2% crude protein supplied adequate protein to improve milk production in lactating donkeys. Abstract Donkey milk is considered as a functional food due to its high levels of whey protein, and can be used in newborn nutrition, due to the nutritional similarities with human milk and its hypoallergenic property. However, donkey milk yield is very low and little is known about improving donkey milk yield by nutrition manipulation. The effect of dietary crude protein (CP) levels on milk production, nutrient digestibility, and serum metabolites was investigated in the current study. Twenty-four lactating donkeys were randomly assigned to one of the following three CP content diets: 15.3% (HP), 14.2% (MP), and 13.1% (LP) of dry matter, respectively. The experiment lasted for 10 weeks, with the first two weeks being used for adaptation. The results showed that milk yield and yields of protein, lactose, solid-not-fat, total solid, and contents of protein, total solid and milk urea nitrogen in the HP and MP groups were higher than the LP group. No significant changes were observed in dry-matter intake, contents of milk fat, lactose or solid-not-fat. The feed conversion ratio, milk protein synthesis efficiency, and the digestibility of dry matter, crude protein, ether extract, acid detergent fiber, neutral detergent fiber, calcium and phosphorous in the HP and MP groups were greater than the LP group. Serum total protein, albumin and urea nitrogen concentrations decreased, while concentrations of non-esterified fatty acids and β-hydroxybutyrate increased in the LP group compared with the HP and MP groups. In conclusion, the diet containing 14.2% CP supplied an adequate amount of protein for improving milk production in lactating donkeys, but milk production was not further increased by feeding the donkeys more than 14.2% CP.
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Metabolomics-based comparative study of breast colostrum and mature breast milk. Food Chem 2022; 384:132491. [DOI: 10.1016/j.foodchem.2022.132491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 11/23/2022]
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Xiao H, Jiang H, Tu H, Jia Y, Wang H, Lü X, Fang R, Xiao G. Extraction, Isolation and Identification of Low Molecular Weight Peptides in Human Milk. Foods 2022; 11:foods11131836. [PMID: 35804652 PMCID: PMC9265843 DOI: 10.3390/foods11131836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/17/2022] [Accepted: 06/20/2022] [Indexed: 11/30/2022] Open
Abstract
Human milk contains numerous free low molecular weight peptides (LMWPs), which may play an important role in infant health and growth. The bioactivities of LMWPs are determined by their structures, especially the amino acid sequences. In the present study, 81 human milk samples were collected and purified by cation-exchange solid-phase extraction (SPE). Ultra-high performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (UPLC-QTOF-MS) was used for the separation and detection of free LMWPs in human milk. A total of 56 LMWPs were identified and quantified. These LMWPs were mainly derived from 3 regions of β-casein, which were the amino acid fragments of 16–40, 85–110, and 205–226. The predominant LMWPs were RETIESLSSSEESITEYK, RETIESLSSSEESITEYKQKVEKVK, ETIESLSSSEESITEYK, TQPLAPVHNPIS, and QPLAPVHNPISV with molecular weights of 2247.9573, 2860.2437, 2091.8591, 1372.7666, and 1271.7212, respectively. The results indicated that the technique based on SPE and UPLC-QTOF-MS might greatly facilitate the analysis of LMWPs in human milk.
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Affiliation(s)
- Hailong Xiao
- Key Laboratory of Agricultural Products Chemical and Biological Processing Technology, Zhejiang University of Science and Technology, Hangzhou 310023, China; (H.X.); (R.F.)
- Hangzhou Institute for Food and Drug Control, Hangzhou 310017, China; (H.J.); (H.T.); (Y.J.); (H.W.)
- Zhejiang Market Bureau Supervision Key Laboratory of Dairy and Dairy Products, Hangzhou 310017, China
| | - He Jiang
- Hangzhou Institute for Food and Drug Control, Hangzhou 310017, China; (H.J.); (H.T.); (Y.J.); (H.W.)
- Zhejiang Market Bureau Supervision Key Laboratory of Dairy and Dairy Products, Hangzhou 310017, China
| | - Haiyun Tu
- Hangzhou Institute for Food and Drug Control, Hangzhou 310017, China; (H.J.); (H.T.); (Y.J.); (H.W.)
- Zhejiang Market Bureau Supervision Key Laboratory of Dairy and Dairy Products, Hangzhou 310017, China
| | - Yanbo Jia
- Hangzhou Institute for Food and Drug Control, Hangzhou 310017, China; (H.J.); (H.T.); (Y.J.); (H.W.)
- Zhejiang Market Bureau Supervision Key Laboratory of Dairy and Dairy Products, Hangzhou 310017, China
| | - Hongqing Wang
- Hangzhou Institute for Food and Drug Control, Hangzhou 310017, China; (H.J.); (H.T.); (Y.J.); (H.W.)
- Zhejiang Market Bureau Supervision Key Laboratory of Dairy and Dairy Products, Hangzhou 310017, China
| | - Xin Lü
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China;
| | - Ruosi Fang
- Key Laboratory of Agricultural Products Chemical and Biological Processing Technology, Zhejiang University of Science and Technology, Hangzhou 310023, China; (H.X.); (R.F.)
| | - Gongnian Xiao
- Key Laboratory of Agricultural Products Chemical and Biological Processing Technology, Zhejiang University of Science and Technology, Hangzhou 310023, China; (H.X.); (R.F.)
- Correspondence: ; Tel./Fax: +86-571-85070370
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Li M, Li Q, Song W, Liu Y, Zhang X, Zheng Y, Yue X. Discovery of lipid biomarkers between bovine colostrum and milk using UHPLC-Q-TOF-MS lipidomics. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2021.105091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Li M, Yu H, Chen J, Abdlla R, Liu A, Song W, Zhang J, Zhang X, Yue X, Li Q. Novel insights into whey protein differences between donkey and bovine milk. Food Chem 2021; 365:130397. [PMID: 34252618 DOI: 10.1016/j.foodchem.2021.130397] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/15/2021] [Accepted: 06/15/2021] [Indexed: 11/26/2022]
Abstract
In this study, we characterized and compared the whey proteins from donkey and bovine milk using HPLC-MS/MS-based proteomics. A total of 989 and 1534 whey proteins were characterized in donkey and bovine milk, respectively. Furthermore, 623 whey proteins were found in both groups, and 229 differentially expressed whey proteins (DEWPs) were identified. Among the common proteins, 66 DEWPs were upregulated and 163 were downregulated in donkey milk compared to those in bovine milk. Gene Ontology analysis revealed the cellular components, biological processes, and molecular functions of these DEWPs. Metabolic pathway analysis suggested that most DEWPs were associated with endocytosis, platelet activation, and phagocytosis. These results improve our understanding of the differences between donkey and bovine whey proteins and provide important information regarding these proteins as nutritional and functional factors in dairy product formulations from multiple milk sources.
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Affiliation(s)
- Mohan Li
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Haikun Yu
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Jiali Chen
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Rayhnigul Abdlla
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Aicheng Liu
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Wanying Song
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Juan Zhang
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Xiumin Zhang
- Beijing Academy of Food Sciences, Beijing 100068, China
| | - Xiqing Yue
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Qilong Li
- College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China.
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Liu Q, Yu J, Li M, Zhang R, Gao P, Cong G, Cui D, Ji C, Zeng S. Multivariate models for estimating jackass semen production and quality. Reprod Domest Anim 2020; 56:301-312. [PMID: 33068490 DOI: 10.1111/rda.13842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 10/13/2020] [Indexed: 12/22/2022]
Abstract
The purpose of this study was to analyse the effects of season, age, gonad and accessory sex glands on semen characteristics of jackass and to construct multivariate regression models to predict semen quality. In autumn, spring and summer, semen characteristics of 30 sexually mature donkeys (1,014 ejaculations) were analysed to investigate the effect of seasons on semen quality, and gonad and accessory sex gland parameters of 12 jackasses were measured immediately after ejaculation by ultrasonography to investigate the effect of seasons on reproductive organ size. Semen (598 ejaculates), gonad and accessory sex gland parameters of 40 jackasses aged between 3 and 7 years were analysed in autumn to investigate the effects of age and reproductive organ size on semen quality and to construct multivariate models. To verify the accuracy of the models, semen (476 ejaculates), gonad and accessory sex gland parameters of 20 jackasses were measured from March to June. Results revealed that semen, gonad and accessory sex gland parameters were not affected by season and age. Progressive motility (PM) was positively correlated with long axis of the spermatic cord (LASC) and negatively correlated with percentages of sperm abnormality (PSA). Total sperm count (TSC) was positively correlated with testis circumferences (TC) and cross-sectional area of cauda epididymis (CSACE). TC, CSACE, LASC and PSA were included into multivariate models to predict PM, TSC and functional sperm count (FSC) in 20 jackasses (PM = 72.332 + 0.428 LASC - 0.441 PSA; TSC = -169.929 + 8.728 TC + 0.253 CSACE; FSC = -206.645 + 8.788 TC + 0.258 CSACE). The predicted and observed values corresponded well. In conclusion, the tested models can be used for predicting semen quality of donkey.
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Affiliation(s)
- Qing Liu
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jie Yu
- College of Animal Science and Technology, Northwest Agriculture & Forestry University, Yangling, China.,National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong-E-E-Jiao Co. Ltd., Liaocheng, China
| | - Min Li
- National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong-E-E-Jiao Co. Ltd., Liaocheng, China
| | - Ruitao Zhang
- National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong-E-E-Jiao Co. Ltd., Liaocheng, China
| | - Peng Gao
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Guanglei Cong
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Daiyong Cui
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Chuanliang Ji
- National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong-E-E-Jiao Co. Ltd., Liaocheng, China
| | - Shenming Zeng
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Liu Q, Cui D, Cong G, Ma J, Yu J, Ji C, Zeng S. Timed Artificial Insemination by Combining Estrous Behavior Observation With Deslorelin Treatment in Jennies. J Equine Vet Sci 2020; 95:103279. [PMID: 33276933 DOI: 10.1016/j.jevs.2020.103279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/26/2020] [Accepted: 09/29/2020] [Indexed: 11/27/2022]
Abstract
The purpose of this study was to determine the optimal time for ovulation induction and artificial insemination (AI) based on the relationship between estrous behavior and ovulation in jennies. Thirty-two jennies were teased by one jackass for 1 hour per day during 46 days and estrous behaviors were recorded, while the follicular development and ovulation was examined by ultrasound. Furthermore, another 31 jennies were teased by one jackass as the teasing group (group T), which were injected with Deslorelin at 2 and 4 days after the onset of estrus, and AI was performed at 8 hours after each injection. Moreover, Ultrasound was performed on the follicle development of 23 jennies as the ultrasonography group (group U). Injection with Deslorelin when the follicle diameter ≥ 30 mm, and AI was performed at 8 hours later. The results showed that mouth clapping was the specific estrous behavior of jennies and indicated the beginning of estrus. The mean time for jennies to develop dominant follicles (≥30 mm) after the onset of estrus was 3.5 ± 1.3 days, and the mean time between the onset of estrus and ovulation was 5.1 ± 1.5 days. Estrous behaviors ended 0.5 ± 1.2 days after ovulation. After AI, there were no significant differences in ovulation (96.8% vs. 91.3%) and conception rates (40.0% vs. 38.1%) between group T and U. The optimal breeding time of jennies can be determined by jackass teasing and hastening ovulation by Deslorelin injection.
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Affiliation(s)
- Qing Liu
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Daiyong Cui
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Guanglei Cong
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jinliang Ma
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jie Yu
- National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong-E-E-Jiao Co. Ltd., Liaocheng, Shandong, China
| | - Chuanliang Ji
- National Engineering Research Center for Gelatin-based Traditional Chinese Medicine, Dong-E-E-Jiao Co. Ltd., Liaocheng, Shandong, China
| | - Shenming Zeng
- Key Laboratory for Animal Genetics, Breeding, Reproduction and Molecular Design, College of Animal Science and Technology, Yangzhou University, Yangzhou, China; National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China.
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Li M, Li Q, Kang S, Cao X, Zheng Y, Wu J, Wu R, Shao J, Yang M, Yue X. Characterization and comparison of lipids in bovine colostrum and mature milk based on UHPLC-QTOF-MS lipidomics. Food Res Int 2020; 136:109490. [PMID: 32846571 DOI: 10.1016/j.foodres.2020.109490] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 06/17/2020] [Accepted: 06/23/2020] [Indexed: 12/30/2022]
Abstract
Lipids in bovine milk have several biological activities, with implications for human health and the physical functionality of foods. However, alterations in the lipid profile of bovine milk during lactation are not well-studied. This study aimed to identify differences in lipids between bovine colostrum and mature milk, using a lipidomics approach. Using an advanced mass spectrometry-based quantitative lipidomics approach, 335 lipids assigned to 13 subclasses were characterized in bovine colostrum (BC) and mature milk (BM). In total, 63 significantly differential lipids (SDLs) were identified. Among the 63 SDLs, the levels of 21 lipids were significantly lower in BM than in BC, including 5 glycerophosphatidylethanolamines (PEs), 1 glycerophosphatidylglycerol (PG), and 15 triacylglycerols (TGs). The levels of the remaining 42 lipids increased in BM, including 1 cardiolipin (CL), 9 diacylglycerols (DGs), 9 dihexosylceramides (Hex2Cers), 3 hexosylceramides (HexCers), 3 glycerophosphatidic acids (PAs), 2 glycerophosphatidylcholines (PCs), 12 PEs, and 3 TGs. Furthermore, the correlations and related metabolic pathways of these 63 SDLs were analyzed to explore the mechanisms that alter bovine milk lipids during lactation. The seven most relevant pathways identified herein, ranked in accordance with their degree of influence on lactation, were glycerophospholipid metabolism, sphingolipid metabolism, glycerolipid metabolism, glycosylphosphatidylinositol-anchor biosynthesis, linoleic acid metabolism, alpha-linolenic acid metabolism, and arachidonic acid metabolism. Our results provide essential insights into mechanisms underlying alterations in bovine milk lipids during different lactation periods, along with practical information of specific nutrition and quality assessments for the dairy industry.
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Affiliation(s)
- Mohan Li
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Qilong Li
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Shimo Kang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Xueyan Cao
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Yan Zheng
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Junrui Wu
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Rina Wu
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Junhua Shao
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China
| | - Mei Yang
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China.
| | - Xiqing Yue
- College of Food Science, Shenyang Agricultural University, Shenyang, Liaoning Province, China.
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