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Wanapat M, Dagaew G, Sommai S, Matra M, Suriyapha C, Prachumchai R, Muslykhah U, Phupaboon S. The application of omics technologies for understanding tropical plants-based bioactive compounds in ruminants: a review. J Anim Sci Biotechnol 2024; 15:58. [PMID: 38689368 PMCID: PMC11062008 DOI: 10.1186/s40104-024-01017-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 02/29/2024] [Indexed: 05/02/2024] Open
Abstract
Finding out how diet impacts health and metabolism while concentrating on the functional qualities and bioactive components of food is the crucial scientific objective of nutritional research. The complex relationship between metabolism and nutrition could be investigated with cutting-edge "omics" and bioinformatics techniques. This review paper provides an overview of the use of omics technologies in nutritional research, with a particular emphasis on the new applications of transcriptomics, proteomics, metabolomics, and genomes in functional and biological activity research on ruminant livestock and products in the tropical regions. A wealth of knowledge has been uncovered regarding the regulation and use of numerous physiological and pathological processes by gene, mRNA, protein, and metabolite expressions under various physiological situations and guidelines. In particular, the components of meat and milk were assessed using omics research utilizing the various methods of transcriptomics, proteomics, metabolomics, and genomes. The goal of this review is to use omics technologies-which have been steadily gaining popularity as technological tools-to develop new nutritional, genetic, and leadership strategies to improve animal products and their quality control. We also present an overview of the new applications of omics technologies in cattle production and employ nutriomics and foodomics technologies to investigate the microbes in the rumen ecology. Thus, the application of state-of-the-art omics technology may aid in our understanding of how species and/or breeds adapt, and the sustainability of tropical animal production, in the long run, is becoming increasingly important as a means of mitigating the consequences of climate change.
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Affiliation(s)
- Metha Wanapat
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Gamonmas Dagaew
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Sukruthai Sommai
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Maharach Matra
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Chaichana Suriyapha
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Rittikeard Prachumchai
- Department of Animal Science, Faculty of Agricultural Technology, University of Technology Thanyaburi, Rajamangala Pathum Thani, 12130, Thailand
| | - Uswatun Muslykhah
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Srisan Phupaboon
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.
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Liao CC, Chien CH, Hsu TJ, Li JM. Advancing breastfeeding promotion: leveraging integrative natural galactagogues and unveiling their potential roles-Insights from a 19-year Taiwan nationwide registry to address lactation insufficiency in postpartum women. Front Nutr 2024; 11:1293735. [PMID: 38371501 PMCID: PMC10869601 DOI: 10.3389/fnut.2024.1293735] [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: 09/13/2023] [Accepted: 01/15/2024] [Indexed: 02/20/2024] Open
Abstract
Background Lactation insufficiency is a prevalent challenge for nursing mothers globally. There is a growing interest in the use of herbal galactagogues for enhancing lactation, but their therapeutic efficacy and underlying mechanisms need thorough investigation. This study aims to investigate the efficacy and mechanisms of action of herbal galactagogues in addressing lactation insufficiency by utilizing real-world data and employing a network analysis approach. Methods Our retrospective study used Taiwan's Longitudinal Health Insurance Database 2000 (LHID2000) to identify 490 patients diagnosed with lactation insufficiency from 2000 to 2018. We analyzed demographic characteristics, co-existing diseases, and prescription patterns for both users and non-users of Chinese herbal products (CHP). Additionally, we utilized a network analysis approach to explore potential compounds and targets in the most frequently used CHP, the Wang Bu Liu Xing and Lu Lu Tong herb pair (WLHP) combination. Results Out of 490 patients, 81% were CHP users. There were no significant differences in demographic characteristics between CHP users and non-users, but we observed a notable divergence in the prevalence of co-existing diseases. A detailed examination of CHP prescriptions revealed the predominance of WLHP, prompting further investigation. Comprehensive analysis identified 29 major compounds in WLHP, which were associated with 215 unique targets. Intersection analysis revealed 101 overlapping targets between WLHP and lactation, suggesting their potential as therapeutic targets for lactation insufficiency treatment. Topological analysis of the protein-protein interaction (PPI) network identified 13 hub genes potentially crucial for the therapeutic effect of WLHP. Functional enrichment analysis showed that these targets were involved in critical lactation regulation pathways, including the PI3K-Akt signaling pathway, prolactin signaling pathway, estrogen signaling pathway, and AMPK signaling pathway. Discussion This study emphasizes the potential of CHP, specifically the WLHP combination, in managing lactation insufficiency. The multi-compound, multi-target approach of WLHP and its interaction with key biological processes and signaling pathways offer valuable insights into the underlying mechanisms of its therapeutic effects. These findings warrant further experimental validation and can guide future research and clinical applications of CHP in lactation insufficiency treatment.
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Affiliation(s)
- Chung-Chih Liao
- Department of Post-Baccalaureate Veterinary Medicine, College of Medical and Health Science, Asia University, Taichung, Taiwan
- Chuyuan Chinese Medicine Clinic, Taichung, Taiwan
| | - Chi-Hsien Chien
- Department of Post-Baccalaureate Veterinary Medicine, Asia University, Taichung, Taiwan
| | - Tzu-Ju Hsu
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
| | - Jung-Miao Li
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan
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Sahito JZA, Deng S, Qin L, Xiao L, Zhang D, Huang B. CeRNA Network Reveals the Circular RNA Characterization in Goat Ear Fibroblasts Reprogramming into Mammary Epithelial Cells. Genes (Basel) 2023; 14:1831. [PMID: 37895180 PMCID: PMC10606430 DOI: 10.3390/genes14101831] [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: 07/27/2023] [Revised: 08/18/2023] [Accepted: 08/22/2023] [Indexed: 10/29/2023] Open
Abstract
Circular RNAs (circRNAs) are a type of non-coding RNA that play a crucial role in the development and lactation of mammary glands in mammals. A total of 107 differentially expressed circRNAs (DE circRNAs) were found, of which 52 were up-regulated and 55 were down-regulated. We also found that DE circRNA host genes were mainly involved in GO terms related to the development process of mammary epithelial cells and KEGG pathways were mostly related to mammary epithelial cells, lactation, and gland development. Protein network analysis found that DE circRNAs can competitively bind to miRNAs as key circRNAs by constructing a circRNA-miRNA-mRNA network. CircRNAs competitively bind to miRNAs (miR-10b-3p, miR-671-5p, chi-miR-200c, chi-miR-378-3p, and chi-miR-30e-5p) involved in goat mammary gland development, mammary epithelial cells, and lactation, affecting the expression of core genes (CDH2, MAPK1, ITGB1, CAMSAP2, and MAPKAPK5). Here, we generated CiMECs and systematically explored the differences in the transcription profile for the first time using whole-transcriptome sequencing. We also analyzed the interaction among mRNA, miRNA, and cirRNA and predicted that circRNA plays an important role in the maintenance of mammary epithelial cells.
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Affiliation(s)
- Jam Zaheer Ahmed Sahito
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (J.Z.A.S.); (S.D.); (L.Q.); (L.X.); (D.Z.)
| | - Shan Deng
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (J.Z.A.S.); (S.D.); (L.Q.); (L.X.); (D.Z.)
| | - Liangshan Qin
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (J.Z.A.S.); (S.D.); (L.Q.); (L.X.); (D.Z.)
| | - Lianggui Xiao
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (J.Z.A.S.); (S.D.); (L.Q.); (L.X.); (D.Z.)
| | - Dandan Zhang
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (J.Z.A.S.); (S.D.); (L.Q.); (L.X.); (D.Z.)
- Guangxi Key Laboratory of Eye Health, The People’s Hospital of Guangxi Zhuang Autonomous Region, Guangxi Academy of Medical Sciences, Nanning, 530021, China
| | - Ben Huang
- College of Animal Science and Technology, Guangxi University, Nanning 530004, China; (J.Z.A.S.); (S.D.); (L.Q.); (L.X.); (D.Z.)
- Guangxi Key Laboratory of Eye Health, The People’s Hospital of Guangxi Zhuang Autonomous Region, Guangxi Academy of Medical Sciences, Nanning, 530021, China
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Differences in the microRNAs Levels of Raw Milk from Dairy Cattle Raised under Extensive or Intensive Production Systems. Vet Sci 2022; 9:vetsci9120661. [PMID: 36548822 PMCID: PMC9783024 DOI: 10.3390/vetsci9120661] [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: 09/16/2022] [Revised: 11/15/2022] [Accepted: 11/21/2022] [Indexed: 11/29/2022] Open
Abstract
Studying microRNA (miRNAs) in certain agri-food products is attractive because (1) they have potential as biomarkers that may allow traceability and authentication of such products; and (2) they may reveal insights into the products' functional potential. The present study evaluated differences in miRNAs levels in fat and cellular fractions of tank milk collected from commercial farms which employ extensive or intensive dairy production systems. We first sequenced miRNAs in three milk samples from each production system, and then validated miRNAs whose levels in the cellular and fat fraction differed significantly between the two production systems. To accomplish this, we used quantitative PCR with both fractions of tank milk samples from another 20 commercial farms. Differences in miRNAs were identified in fat fractions: overall levels of miRNAs, and, specifically, the levels of bta-mir-215, were higher in intensive systems than in extensive systems. Bovine mRNA targets for bta-miR-215 and their pathway analysis were performed. While the causes of these miRNAs differences remain to be elucidated, our results suggest that the type of production system could affect miRNAs levels and potential functionality of agri-food products of animal origin.
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Critical Review on Physiological and Molecular Features during Bovine Mammary Gland Development: Recent Advances. Cells 2022; 11:cells11203325. [PMID: 36291191 PMCID: PMC9600653 DOI: 10.3390/cells11203325] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/09/2022] [Accepted: 10/12/2022] [Indexed: 11/16/2022] Open
Abstract
The mammary gland is a unique organ with the ability to undergo repeated cyclic changes throughout the life of mammals. Among domesticated livestock species, ruminants (cattle and buffalo) constitute a distinct class of livestock species that are known milk producers. Cattle and buffalo contribute to 51 and 13% of the total milk supply in the world, respectively. They also play an essential role in the development of the economy for farming communities by providing milk, meat, and draft power. The development of the ruminant mammary gland is highly dynamic and multiphase in nature. There are six developmental stages: embryonic, prepubertal, pubertal, pregnancy, lactation, and involution. There has been substantial advancement in our understanding of the development of the mammary gland in both mouse and human models. Until now, there has not been a thorough investigation into the molecular processes that underlie the various stages of cow udder development. The current review sheds light on the morphological and molecular changes that occur during various developmental phases in diverse species, with a particular focus on the cow udder. It aims to explain the physiological differences between cattle and non-ruminant mammalian species such as humans, mice, and monkeys. Understanding the developmental biology of the mammary gland in molecular detail, as well as species-specific variations, will facilitate the researchers working in this area in further studies on cellular proliferation, differentiation, apoptosis, organogenesis, and carcinogenesis. Additionally, in-depth knowledge of the mammary gland will promote its use as a model organ for research work and promote enhanced milk yield in livestock animals without affecting their health and welfare.
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Methionine Supplementation during Pregnancy of Goats Improves Kids' Birth Weight, Body Mass Index, and Postnatal Growth Pattern. BIOLOGY 2022; 11:biology11071065. [PMID: 36101442 PMCID: PMC9312974 DOI: 10.3390/biology11071065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/01/2022] [Accepted: 07/13/2022] [Indexed: 11/21/2022]
Abstract
The last third of gestation is a period of high energy and protein demand for the dam to support fetal growth and the following onset of lactation. Methionine is an essential amino acid that contributes to protein formation, fetal development, and milk synthesis; thus, is likely to have positive effects on the weight and size of the newborn and, afterward, milk yield and milk composition, which may improve growth patterns of the progeny. To test these hypotheses, we used 60 pregnant multiparous Alpine goats with similar live weights and gestational ages (~Day 100 of pregnancy; Mean ± SD; 1410 ± 14 days old and 50.4 ± 6.6 kg) and were separated into two groups: control and supplemented with the delivery. Treatments were T-MET (n = 30; received 1% herbal methionine Optimethione® dry matter based on from Day 100 of the pregnancy to delivery) or T-CTL (n = 30; served as the control and did not receive methionine). The methionine powder provided individual supplementation and was adjusted every week as the live weight and dry matter intake changed. At birth, the weight, body mass index (BMI), birth type, and sex of the kids were determined. Subsequently, the progeny was weighed weekly up to weaning. Two weeks after parturition, the milk composition was recorded weekly, and the milk yield was recorded monthly. The maternal live weight at the start (Mean ± SEM; T-CTL: 50.5 ± 1.1 vs. T-MET: 50.3 ± 1.3 kg) and end (T-CTL: 54.2 ± 1.3 vs. T-MET: 52.8 ± 1.4 kg) of the experiment did not differ statistically among treatments (p > 0.05); however, daily live weight changes tended to differ between groups (T-CTL: 73 ± 10 vs. T-MET: 51 ± 7 g day−1; p = 0.06). The birth weight (T-CTL: 3.1 ± 0.1 vs. T-MET: 3.5 ± 0.1 kg; p < 0.001), daily live weight change (T-CTL: 121 ± 6 vs. T-MET: 141 ± 6 g day−1; p < 0.01), and weaning weight (T-CTL: 8.3 ± 0.2 vs. T-MET: 9.3 ± 0.3 kg; p < 0.01) differed between treatments. The BMI at birth (T-CTL: 0.28 ± 0.01 vs. T-MET: 0.3 ± 0.01 units kg m−2; p < 0.01) and at weaning (T-CTL: 0.85 ± 0.1 kg vs. T-MET: 1.00 ± 0.06 units kg m−2; p < 0.05) differed between treatments. Milk components (protein, fat, lactose, and solids non-fat) and milk yield were similar between treatments (p > 0.05). It is concluded that the inclusion of methionine in the maternal goat diet during the last third of gestation increases the birth and growth variables of the progeny but without significant influence on the milk yield and composition.
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MAPK1 Is Regulated by LOC102188416/miR-143-3p Axis in Dairy Goat Mammary Epithelial Cells. Genes (Basel) 2022; 13:genes13061013. [PMID: 35741775 PMCID: PMC9222919 DOI: 10.3390/genes13061013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/08/2022] [Accepted: 05/25/2022] [Indexed: 02/05/2023] Open
Abstract
MicroRNA-143-3p (miR-143-3p) is one of the miRNAs involved in the growth of goat mammary epithelial cells (GMECs). In this study, Illumina/Solexa sequencing was performed to establish the lncRNA database in Laoshan dairy goats. Using the lncRNA database, long noncoding RNAs (lncRNAs) regulated by miR-143-3p were screened. In total, 4899 lncRNAs were identified, with 173 lncRNAs being differentially expressed in all three replicates. The target genes of the differentially expressed lncRNAs were annotated in GO terms and KEGG pathways. Among the differentially expressed lncRNAs, lncRNA LOC102188416 was predicted to sponge miR-143-3p and share MAPK1 as a common target gene with miR-143-3p, which was validated by dual luciferase reporter assay system and qRT-PCR. The miR-143-3p mimic significantly lowered the relative luciferase activity of psiCHECK2-LOC102188416 wildtype vector but not mutated vector, suggesting that lncRNA LOC102188416 might be a sponge of miR-143-3p, which was verified by the promotion role of lncRNA LOC102188416 siRNA (siR-LOC102188416) in the expression of miR-143-3p. It was shown that the expression of MAPK1 was downregulated by either miR-143-3p mimic or siR-LOC102188416, indicating that miR-143-3p and lncRNA LOC102188416 had a coregulatory effect on MAPK1 expression. The co-transfection of miR-143-3p inhibitor with siR-LOC102188416 reversed the decrease of MAPK1 expression regulated by siR-LOC102188416 alone, strengthening the existence of lncRNA LOC102188416/miR-143-3p/MAPK1 axis in GMECs of Laoshan dairy goats.
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Wu X, Ayalew W, Chu M, Pei J, Liang C, Bao P, Guo X, Yan P. Characterization of RNA Editome in the Mammary Gland of Yaks during the Lactation and Dry Periods. Animals (Basel) 2022; 12:ani12020207. [PMID: 35049829 PMCID: PMC8773173 DOI: 10.3390/ani12020207] [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: 11/17/2021] [Revised: 01/01/2022] [Accepted: 01/14/2022] [Indexed: 12/03/2022] Open
Abstract
Simple Summary In order to study the influence of RNA editing sites on lactation and mammary gland development process in yaks, we comprehensively characterized the RNA editome of the yak mammary gland during the lactation period and dry period by using the transcriptome and genome sequencing data. The results revealed 82,872 nonredundant RNA editing sites, 14,159 of which were differentially edited between the lactation period and dry period. Enrichment analysis showed that the genes harboring differential editing sites were mainly associated with mammary gland development-related pathways, such as MAPK pathway, PI3K-Akt pathway, FoxO signaling pathway, GnRH signaling pathway, and focal adhesion pathway. Our findings offer some novel insights into the RNA editing function in the mammary gland of yaks. Abstract The mammary gland is a complicated organ comprising several types of cells, and it undergoes extensive morphogenetic and metabolic changes during the female reproductive cycle. RNA editing is a posttranscriptional modification event occurring at the RNA nucleotide level, and it drives transcriptomic and proteomic diversities, with potential functional consequences. RNA editing in the mammary gland of yaks, however, remains poorly understood. Here, we used REDItools to identify RNA editing sites in mammary gland tissues in yaks during the lactation period (LP, n = 2) and dry period (DP, n = 3). Totally, 82,872 unique RNA editing sites were identified, most of which were detected in the noncoding regions with a low editing degree. In the coding regions (CDS), we detected 5235 editing sites, among which 1884 caused nonsynonymous amino acid changes. Of these RNA editing sites, 486 were found to generate novel possible miRNA target sites or interfere with the initial miRNA binding sites, indicating that RNA editing was related to gene regulation mediated by miRNA. A total of 14,159 RNA editing sites (involving 3238 common genes) showed a significant differential editing level in the LP when compared with that in the DP through Tukey’s Honest Significant Difference method (p < 0.05). According to the Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis, genes that showed different RNA editing levels mainly participated in pathways highly related to mammary gland development, including MAPK, PI3K-Akt, FoxO, and GnRH signaling pathways. Collectively, this work demonstrated for the first time the dynamic RNA editome profiles in the mammary gland of yaks and shed more light on the mechanism that regulates lactation together with mammary gland development.
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Affiliation(s)
- Xiaoyun Wu
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
| | - Wondossen Ayalew
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
- Department of Animal Production and Technology, Wolkite University, Wolkite P.O. Box 07, Ethiopia
| | - Min Chu
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
| | - Jie Pei
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
| | - Chunnian Liang
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
| | - Pengjia Bao
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
| | - Xian Guo
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
- Correspondence: (X.G.); (P.Y.)
| | - Ping Yan
- Key Laboratory of Yak Breeding Engineering, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (X.W.); (W.A.); (M.C.); (J.P.); (C.L.); (P.B.)
- Correspondence: (X.G.); (P.Y.)
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Silva JVV, Ganesan S, Wickramasinghe HKJP, Stepanchenko N, Kaya CA, Beitz DC, Appuhamy JADRN. Effects of branched-chain amino acids on glucose uptake and lactose synthesis rates in bovine mammary epithelial cells and lactating mammary tissue slices. J Dairy Sci 2021; 105:1717-1730. [PMID: 34802743 DOI: 10.3168/jds.2021-20950] [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: 07/01/2021] [Accepted: 10/15/2021] [Indexed: 11/19/2022]
Abstract
Even though supplementations of essential AA (EAA) are often related to increased lactose yields in dairy cows, underlying mechanisms connecting EAA availability to the mammary glands and lactose synthesis are poorly understood. The objective of this study was to examine the effects of branched-chain AA (BCAA) including Leu, Ile, and Val on (1) glucose transporter (GLUT1) abundance and glucose uptake, (2) the abundance of proteins regulating lactose synthesis pathway, and (3) fractional synthesis rates of lactose (FSR) using bovine mammary epithelial cells (BMEC) and mammary tissues slices (MTS). The BMEC (n = 4) were allocated randomly to regular Dulbecco's Modified Eagle Medium with Ham's F12 (DMEM/F12) media (+EAA) or +EAA deficient (by 90%) in all EAA (-EAA), all BCAA (-BCAA), only Leu (-Leu), only Ile (-Ile) or only Val (-Val). Western immunoblotting analyses, depletion of glucose in media, and a proteomic analysis were performed to determine the abundance of GLUT1 in the cell membrane, net glucose uptake, and the abundance of enzymes involved in lactose synthesis pathway in BMEC, respectively. The MTS (n = 6) were allocated randomly to DMEM/F12 media having all EAA and 13C-glucose at concentrations similar to plasma concentrations of cows (+EAAp), and +EAAp deprived of all BCAA (-BCAAp) or only Leu (-Leup) for 3 h. The 13C enrichments of free glucose pool in MTS (EGlu-free) and the enrichments of glucose incorporated into lactose in MTS and media [ELactose-bound (T&M)] were determined and used in calculating FSR. In BMEC, -BCAA increased the fraction of total GLUT1 translocated to the cell membrane and the fraction that was potentially glycosylated compared with +EAA. Among individual BCAA, only -Leu was associated with a 63% increase in GLUT1 translocated to the cell membrane and a 40% increase in glucose uptake of BMEC. The -BCAA tended to be related to a 75% increase in the abundance of hexokinase in BMEC. Deprivation of Leu tended to increase glucose uptake of MTS but did not affect EGlu-free, ELactose-bound (T&M), or FSR relative to +EAAp. On the other hand, -BCAAp did not affect glucose uptake of MTS but was related to lower ELactose-bound (T&M), or FSR relative to +EAAp. Considering together, decreasing Leu supply to mammary tissues enhances GLUT1 and thus glucose uptake, which, however, does not affect lactose synthesis rates. Moreover, the deficiency of other BCAA, Ile, and Val alone or together with the deficiency of Leu seemed to decrease lactose synthesis rates without affecting glucose uptake. The data also emphasize the importance of addressing the effect of the supply of other nutrients to the mammary glands than the precursor supply in describing the synthesis of a milk component.
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Affiliation(s)
- J V V Silva
- Department of Animal Science, Iowa State University, Ames 50011
| | - S Ganesan
- Department of Animal Science, Iowa State University, Ames 50011
| | | | - N Stepanchenko
- Department of Animal Science, Iowa State University, Ames 50011
| | - C A Kaya
- Department of Livestock and Crop Production, Dicle University, Diyarbakir, 21280, Turkey
| | - D C Beitz
- Department of Animal Science, Iowa State University, Ames 50011
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Supplementing conjugated and non-conjugated L-methionine and acetate alters expression patterns of CSN2, proteins and metabolites related to protein synthesis in bovine mammary cells. J DAIRY RES 2021; 87:70-77. [PMID: 32114997 DOI: 10.1017/s0022029919000979] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The experiments reported in this research paper aimed to determine the effect of supplementing different forms of L-methionine (L-Met) and acetate on protein synthesis in immortalized bovine mammary epithelial cell line (MAC-T cells). Treatments were Control, L-Met, conjugated L-Met and acetate (CMA), and non-conjugated L-Met and Acetate (NMA). Protein synthesis mechanism was determined by omics method. NMA group had the highest protein content in the media and CSN2 mRNA expression levels (P < 0.05). The number of upregulated and downregulated proteins observed were 39 and 77 in L-Met group, 62 and 80 in CMA group and 50 and 81 in NMA group from 448 proteins, respectively (P < 0.05). L-Met, NMA and CMA treatments stimulated pathways related to protein and energy metabolism (P < 0.05). Metabolomic analysis also revealed that L-Met, CMA and NMA treatments resulted in increases of several metabolites (P < 0.05). In conclusion, NMA treatment increased protein concentration and expression level of CSN2 mRNA in MAC-T cells compared to control as well as L-Met and CMA treatments through increased expression of milk protein synthesis-related genes and production of the proteins and metabolites involved in energy and protein synthesis pathways.
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Islam S, Reddy UK, Natarajan P, Abburi VL, Bajwa AA, Imran M, Zahoor MY, Abdullah M, Bukhari AM, Iqbal S, Ashraf K, Nadeem A, Rehman H, Rashid I, Shehzad W. Population demographic history and population structure for Pakistani Nili-Ravi breeding bulls based on SNP genotyping to identify genomic regions associated with male effects for milk yield and body weight. PLoS One 2020; 15:e0242500. [PMID: 33232358 PMCID: PMC7685427 DOI: 10.1371/journal.pone.0242500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 11/03/2020] [Indexed: 11/20/2022] Open
Abstract
The domestic Nili-Ravi water buffalo (Bubalus bubalis) is the best dairy animal contributing 68% to total milk production in Pakistan. In this study, we identified genome-wide single nucleotide polymorphisms (SNPs) to estimate various population genetic parameters such as diversity, pairwise population differentiation, linkage disequilibrium (LD) distribution and for genome-wide association study for milk yield and body weight traits in the Nili-Ravi dairy bulls that they may pass on to their daughters who are retained for milking purposes. The genotyping by sequencing approach revealed 13,039 reference genome-anchored SNPs with minor allele frequency of 0.05 among 167 buffalos. Population structure analysis revealed that the bulls were grouped into two clusters (K = 2), which indicates the presence of two different lineages in the Pakistani Nili-Ravi water buffalo population, and we showed the extent of admixture of these two lineages in our bull collection. LD analysis revealed 4169 significant SNP associations, with an average LD decay of 90 kb for these buffalo genome. Genome-wide association study involved a multi-locus mixed linear model for milk yield and body weight to identify genome-wide male effects. Our study further illustrates the utility of the genotyping by sequencing approach for identifying genomic regions to uncover additional demographic complexity and to improve the complex dairy traits of the Pakistani Nili-Ravi water buffalo population that would provide the lot of economic benefits to dairy industry.
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Affiliation(s)
- Saher Islam
- Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Umesh K. Reddy
- Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Purushothaman Natarajan
- Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Venkata Lakshmi Abburi
- Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Amna Arshad Bajwa
- Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Imran
- Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Yasir Zahoor
- Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Abdullah
- Department of Livestock Production, University of Veterinary and Animal Sciences, Pattoki, Pakistan
| | - Aamir Mehmood Bukhari
- Semen Production Unit, Qadirabad, District Sahiwal, Pakistan
- Livestock and Dairy Development Department, Government of the Punjab, Lahore, Pakistan
| | - Sajid Iqbal
- Semen Production Unit, Qadirabad, District Sahiwal, Pakistan
- Livestock and Dairy Development Department, Government of the Punjab, Lahore, Pakistan
| | - Kamran Ashraf
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Asif Nadeem
- Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Habibur Rehman
- Department of Physiology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Imran Rashid
- Department of Parasitology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Wasim Shehzad
- Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
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12
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In-depth proteome analysis of more than 12,500 proteins in buffalo mammary epithelial cell line identifies protein signatures for active proliferation and lactation. Sci Rep 2020; 10:4834. [PMID: 32179766 PMCID: PMC7075962 DOI: 10.1038/s41598-020-61521-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 02/25/2020] [Indexed: 12/14/2022] Open
Abstract
The mature mammary gland is made up of a network of ducts that terminates in alveoli. The innermost layer of alveoli is surrounded by the differentiated mammary epithelial cells (MECs), which are responsible for milk synthesis and secretion during lactation. However, the MECs are in a state of active proliferation during pregnancy, when they give rise to network like structures in the mammary gland. Buffalo (Bubalus bubalis) constitute a major source of milk for human consumption, and the MECs are the major precursor cells which are mainly responsible for their lactation potential. The proteome of MECs defines their functional state and suggests their role in various cellular activities such as proliferation and lactation. To date, the proteome profile of MECs from buffalo origin is not available. In the present study, we have profiled in-depth proteome of in vitro cultured buffalo MECs (BuMECs) during active proliferation using high throughput tandem mass spectrometry (MS). MS analysis identified a total of 8330, 5970, 5289, 4818 proteins in four sub-cellular fractions (SCFs) that included cytosolic (SCF-I), membranous and membranous organelle’s (SCF-II), nuclear (SCF-III), and cytoskeletal (SCF-IV). However, 792 proteins were identified in the conditioned media, which represented the secretome. Altogether, combined analysis of all the five fractions (SCFs- I to IV, and secretome) revealed a total of 12,609 non-redundant proteins. The KEGG analysis suggested that these proteins were associated with 325 molecular pathways. Some of the highly enriched molecular pathways observed were metabolic, MAPK, PI3-AKT, insulin, estrogen, and cGMP-PKG signalling pathway. The newly identified proteins in this study are reported to be involved in NOTCH signalling, transport and secretion processes.
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13
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Liu Y, Hou J, Zhang M, Seleh-Zo E, Wang J, Cao B, An X. circ-016910 sponges miR-574-5p to regulate cell physiology and milk synthesis via MAPK and PI3K/AKT-mTOR pathways in GMECs. J Cell Physiol 2019; 235:4198-4216. [PMID: 31663119 PMCID: PMC7028128 DOI: 10.1002/jcp.29370] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 10/07/2019] [Indexed: 12/20/2022]
Abstract
Incremental proofs demonstrate that miRNAs, the essential regulators of gene expression, are implicated in various biological procedures, including mammary development and milk synthesis. Here, the role of miR-574-5p in milk synthesis, apoptosis, and proliferation of goat mammary epithelial cells (GMECs) are explored without precedent, and the molecular mechanisms for the impacts are elucidated. Small RNA libraries were constructed using GMECs transfected with miR-574-5p mimics and negative control followed by sequencing via Solexa technology. Overall, 332 genes were distinguishingly expressed entre two libraries, with 74 genes upregulated and 258 genes downregulated. This approach revealed mitogen-activated protein kinase kinase kinase 9 (MAP3K9), an upstream activator of MAPK signaling, as a differentially expressed unigene. miR-574-5p targeted seed sequences of the MAP3K9 3'-untranslated region and suppressed its messenger RNA (mRNA) and protein levels, correspondingly. GMECs with miR-574-5p overexpression and MAP3K9 inhibition showed increased cell apoptosis and decreased cell proliferation resulting from sustained suppression of MAPK pathways, while MAP3K9 elevation manifested the opposite results. miR-574-5p repressed the phosphorylation of members of protein kinase B (AKT)-mammalian target of rapamycin pathway via downregulating MAP3K9 and AKT3, resulting in reducing the secretion of β-casein and triglycerides in GMECs. Finally, according to the constructed circular RNA (circRNA) libraries and bioinformatics prediction approach, we selected circ-016910 and found it acted as a sponge for miR-574-5p and blocked its relevant behaviors to undertake biological effects in GMECs. The circRNA-miRNA-mRNA network facilitates further probes on the function of miR-574-5p in mammary development and milk synthesis.
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Affiliation(s)
- Yuhan Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Jinxing Hou
- Animal Engineering Branch, Yangling Vocational and Technical College, Yangling, Shaanxi, China
| | - Meng Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Emeline Seleh-Zo
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Jiangang Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Binyun Cao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiaopeng An
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
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14
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Oliveira HR, Lourenco DAL, Masuda Y, Misztal I, Tsuruta S, Jamrozik J, Brito LF, Silva FF, Cant JP, Schenkel FS. Single-step genome-wide association for longitudinal traits of Canadian Ayrshire, Holstein, and Jersey dairy cattle. J Dairy Sci 2019; 102:9995-10011. [PMID: 31477296 DOI: 10.3168/jds.2019-16821] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 07/08/2019] [Indexed: 11/19/2022]
Abstract
Estimating single nucleotide polymorphism (SNP) effects over time is essential to identify and validate candidate genes (or quantitative trait loci) associated with time-dependent variation of economically important traits and to better understand the underlying mechanisms of lactation biology. Therefore, in this study, we aimed to estimate time-dependent effects of SNP and identifying candidate genes associated with milk (MY), fat (FY), and protein (PY) yields, and somatic cell score (SCS) in the first 3 lactations of Canadian Ayrshire, Holstein, and Jersey breeds, as well as suggest their potential pattern of phenotypic effect over time. Random regression coefficients for the additive direct genetic effect were estimated for each animal using single-step genomic BLUP, based on 2 random regression models: one considering MY, FY, and PY in the first 3 lactations and the other considering SCS in the first 3 lactations. Thereafter, SNP solutions were obtained for random regression coefficients, which were used to estimate the SNP effects over time (from 5 to 305 d in lactation). The top 1% of SNP that showed a high magnitude of SNP effect in at least 1 d in lactation were selected as relevant SNP for further analyses of candidate genes, and clustered according to the trajectory of their SNP effects over time. The majority of SNP selected for MY, FY, and PY increased the magnitude of their effects over time, for all breeds. In contrast, for SCS, most selected SNP decreased the magnitude of their effects over time, especially for the Holstein and Jersey breeds. In general, we identified a different set of candidate genes for each breed, and similar genes were found across different lactations for the same trait in the same breed. For some of the candidate genes, the suggested pattern of phenotypic effect changed among lactations. Among the lactations, candidate genes (and their suggested phenotypic effect over time) identified for the second and third lactations were more similar to each other than for the first lactation. Well-known candidate genes with major effects on milk production traits presented different suggested patterns of phenotypic effect across breeds, traits, and lactations in which they were identified. The candidate genes identified in this study can be used as target genes in studies of gene expression.
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Affiliation(s)
- H R Oliveira
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada; Department of Animal Sciences, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil.
| | - D A L Lourenco
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - Y Masuda
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - I Misztal
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - S Tsuruta
- Department of Animal and Dairy Science, University of Georgia, Athens 30602
| | - J Jamrozik
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada; Canadian Dairy Network, Guelph, ON, N1K 1E5, Canada
| | - L F Brito
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada; Department of Animal Sciences, Purdue University, West Lafayette, IN 47907
| | - F F Silva
- Department of Animal Sciences, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-000, Brazil
| | - J P Cant
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - F S Schenkel
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada
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15
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Xu L, Shi L, Liu L, Liang R, Li Q, Li J, Han B, Sun D. Analysis of Liver Proteome and Identification of Critical Proteins Affecting Milk Fat, Protein, and Lactose Metabolism in Dariy Cattle with iTRAQ. Proteomics 2019; 19:e1800387. [DOI: 10.1002/pmic.201800387] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 03/12/2019] [Indexed: 02/02/2023]
Affiliation(s)
- Lingna Xu
- Department of Animal GeneticsBreeding and ReproductionCollege of Animal Science and TechnologyKey Laboratory of Animal GeneticsBreeding and Reproduction of Ministry of Agriculture and Rural AffairsNational Engineering Laboratory for Animal BreedingChina Agricultural University Beijing 100193 China
| | - Lijun Shi
- Department of Animal GeneticsBreeding and ReproductionCollege of Animal Science and TechnologyKey Laboratory of Animal GeneticsBreeding and Reproduction of Ministry of Agriculture and Rural AffairsNational Engineering Laboratory for Animal BreedingChina Agricultural University Beijing 100193 China
| | - Lin Liu
- Beijing Dairy Cattle Center Beijing 100192 China
| | - Ruobing Liang
- Department of Animal GeneticsBreeding and ReproductionCollege of Animal Science and TechnologyKey Laboratory of Animal GeneticsBreeding and Reproduction of Ministry of Agriculture and Rural AffairsNational Engineering Laboratory for Animal BreedingChina Agricultural University Beijing 100193 China
| | - Qian Li
- Department of Animal Production and Environmental ControlCollege of Animal Science and TechnologyHebei Agricultural University Baoding 071001 China
| | - Jianguo Li
- Department of Animal Production and Environmental ControlCollege of Animal Science and TechnologyHebei Agricultural University Baoding 071001 China
| | - Bo Han
- Department of Animal GeneticsBreeding and ReproductionCollege of Animal Science and TechnologyKey Laboratory of Animal GeneticsBreeding and Reproduction of Ministry of Agriculture and Rural AffairsNational Engineering Laboratory for Animal BreedingChina Agricultural University Beijing 100193 China
| | - Dongxiao Sun
- Department of Animal GeneticsBreeding and ReproductionCollege of Animal Science and TechnologyKey Laboratory of Animal GeneticsBreeding and Reproduction of Ministry of Agriculture and Rural AffairsNational Engineering Laboratory for Animal BreedingChina Agricultural University Beijing 100193 China
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16
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Cecchinato A, Macciotta NPP, Mele M, Tagliapietra F, Schiavon S, Bittante G, Pegolo S. Genetic and genomic analyses of latent variables related to the milk fatty acid profile, milk composition, and udder health in dairy cattle. J Dairy Sci 2019; 102:5254-5265. [PMID: 30904297 DOI: 10.3168/jds.2018-15867] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 03/04/2019] [Indexed: 12/31/2022]
Abstract
The aim of this study was to perform genetic, genome-wide association (GWAS), and gene-set enrichment analyses with latent variables related to milk fatty acid profile (i.e., fatty acids factor scores; FAF), milk composition, and udder health in a cohort of 1,158 Italian Brown Swiss cows. The phenotypes under study were 12 FAF previously identified through factor analysis and classified as follows: de novo FA (F1), branched-chain FA-milk yield (F2), biohydrogenation (F3), long-chain fatty acids (F4), desaturation (F5), short-chain fatty acids (F6), milk protein and fat contents (F7), odd fatty acids (F8), conjugated linoleic acids (F9), linoleic acid (F10), udder health (F11) and vaccelenic acid (F12). (Co)variance components were estimated for factor scores using a Bayesian linear animal model via Gibbs sampling. The animals were genotyped with the Illumina BovineSNP50 BeadChip v.2 (Illumina Inc., San Diego, CA). A single marker regression model was fitted for GWAS analysis. The gene-set enrichment analysis was run on the GWAS results using the Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes pathway databases to identify the ontologies and pathways associated with the FAF. Marginal posterior means of the heritabilities of the aforementioned FAF ranged from 0.048 for F12 to 0.310 for F5. Factors F1 and F6 had the highest number of relevant genetic correlations with the other traits. The genomic analysis detected a total of 39 significant SNP located on 17 Bos taurus autosomes. All latent variables produced signals except for F2 and F10. The traits with the highest number of significant associations were F11 (17) and F12 (7). Gene-set enrichment analyses identified significant pathways (false discovery rate 5%) for F3 and F7. In particular, systemic lupus erythematosus was enriched for F3, whereas the MAPK (mitogen-activated protein kinase) signaling pathway was overrepresented for F7. The results support the existence of important and exploitable genetic and genomic variation in these latent explanatory phenotypes. Information acquired might be exploited in selection programs and when designing further studies on the role of the putative candidate genes identified in the regulation of milk composition and udder health.
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Affiliation(s)
- A Cecchinato
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy.
| | - N P P Macciotta
- Dipartimento di Agraria, Sezione Scienze Zootecniche, Università di Sassari, Via de Nicola 9, 07100 Sassari, Italy
| | - M Mele
- Dipartimento di Scienze Agrarie, Alimentari, Agro-ambientali, Università di Pisa, Via del Borghetto, 80, 56124 Pisa, Italy
| | - F Tagliapietra
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - S Schiavon
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - G Bittante
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - S Pegolo
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
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Salama AAK, Duque M, Wang L, Shahzad K, Olivera M, Loor JJ. Enhanced supply of methionine or arginine alters mechanistic target of rapamycin signaling proteins, messenger RNA, and microRNA abundance in heat-stressed bovine mammary epithelial cells in vitro. J Dairy Sci 2019; 102:2469-2480. [PMID: 30639019 DOI: 10.3168/jds.2018-15219] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 11/13/2018] [Indexed: 12/15/2022]
Abstract
Heat stress (HS) causes reductions in milk production, but it is unclear whether this effect is due to reduced number or functional capacity (or both) of mammary cells. Methionine supplementation improves milk protein, whereas Arg is taken up in excess by mammary cells to produce energy and nonessential AA that can be incorporated into milk protein. To evaluate molecular mechanisms by which mammary functional capacity is affected by HS and Met or Arg, mammary alveolar (MAC-T) cells were incubated at thermal-neutral (37°C) or HS (42°C) temperatures. Treatments were optimal AA profiles (control; Lys:Met = 2.9:1.0; Lys:Arg = 2.1:1.0), control plus Met (Lys:Met = 2.5:1.0), or control plus Arg (Lys:Arg = 1.0:1.0). After incubation for 6 h, cells were harvested and RNA and protein were extracted for quantitative real-time PCR and Western blotting. Protein abundance of mechanistic target of rapamycin (MTOR), eukaryotic initiation factor 2a, serine-threonine protein kinase (AKT), 4E binding protein 1 (EIF4EBP1), and phosphorylated EIF4EBP1 was lower during HS. The lower phosphorylated EIF4EBP1 with HS would diminish translation initiation and reduce protein synthesis. Both Met and Arg had no effect on MTOR proteins, but the phosphorylated EIF4EBP1 decreased by AA, especially Arg. Additionally, Met but not Arg decreased the abundance of phosphorylated eukaryotic elongation factor 2, which could be positive for protein synthesis. Although HS upregulated the heat shock protein HSPA1A, the apoptotic gene BAX, and the translation inhibitor EIF4EBP1, the mRNA abundance of PPARG, FASN, ACACA (lipogenesis), and BCL2L1 (antiapoptotic) decreased. Greater supply of Met or Arg reversed most of the effects of HS occurring at the mRNA level and upregulated the abundance of HSPA1A. In addition, compared with the control, supply of Met or Arg upregulated genes related to transcription and translation (MAPK1, MTOR, SREBF1, RPS6KB1, JAK2), insulin signaling (AKT2, IRS1), AA transport (SLC1A5, SLC7A1), and cell proliferation (MKI67). Upregulation of microRNA related to cell growth arrest and apoptosis (miR-34a, miR-92a, miR-99, and miR-184) and oxidative stress (miR-141 and miR-200a) coupled with downregulation of fat synthesis-related microRNA (miR-27ab and miR-221) were detected with HS. Results suggest that HS has a direct negative effect on synthesis of protein and fat, mediated in part by coordinated changes in mRNA, microRNA, and protein abundance of key networks. The positive responses with Met and Arg raise the possibility that supplementation with these AA during HS might have a positive effect on mammary metabolism.
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Affiliation(s)
- A A K Salama
- Group of Research in Ruminants (G2R), Department of Animal and Food Sciences, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - M Duque
- Grupo de Investigación Biogénesis, Facultad de Ciencias Agrarias, Universidad de Antioquia, Carrera 75 # 65-87, Medellín, Colombia
| | - L Wang
- Department of Animal Science, Southwest University, Rongchang, Chongqing 402460, China
| | - K Shahzad
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - M Olivera
- Grupo de Investigación Biogénesis, Facultad de Ciencias Agrarias, Universidad de Antioquia, Carrera 75 # 65-87, Medellín, Colombia
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
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RagD regulates amino acid mediated-casein synthesis and cell proliferation via mTOR signalling in cow mammary epithelial cells. J DAIRY RES 2018; 85:204-211. [DOI: 10.1017/s0022029918000146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This research paper addresses the hypothesis that RagD is a key signalling factor that regulates amino acid (AA) mediated-casein synthesis and cell proliferation in cow mammary epithelial cells (CMECs). The expression of RagD was analysed at different times during pregnancy and lactation in bovine mammary tissue from dairy cows. We showed that expression of RagD at lactation period was higher (P < 0·05) than that at pregnancy period. When CMECs were treated with methionine (Met) or lysine (Lys), expression of RagD, β-casein (CSN2), mTOR and p-mTOR, and cell proliferation were increased. Further, when CMECs were treated to overexpress RagD, expression of CSN2, mTOR and p-mTOR, and cell proliferation were up-regulated. Furthermore, the increase in expression of CSN2, mTOR and p-mTOR, and cell proliferation in response to Met or Lys supply was inhibited by inhibiting RagD, and those effects were reversed in the overexpression model. When CMECs were treated with RagD overexpression together with mTOR inhibition or conversely with RagD inhibition together with mTOR overexpression, results showed that the increase in expression of CSN2 and cell proliferation in response to RagD overexpression was prevented by inhibiting mTOR, and those effects were reversed by overexpressing mTOR. The interaction of RagD with subunit proteins of mTORC1 was analysed, and the result showed that RagD interacted with Raptor. CMECs were treated with Raptor inhibition, and the result showed that the increase in expression of mTOR and p-mTOR in response to RagD overexpression was inhibited by inhibiting Raptor.In conclusion, our study showed that RagD is an important activation factor of mTORC1 in CMECs, activating AA-mediated casein synthesis and cell proliferation, potentially acting via Raptor.
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19
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Zhang Y, Wang P, Lin S, Mercier Y, Yin H, Song Y, Zhang X, Che L, Lin Y, Xu S, Feng B, De Wu, Fang Z. mTORC1 signaling-associated protein synthesis in porcine mammary glands was regulated by the local available methionine depending on methionine sources. Amino Acids 2017; 50:105-115. [PMID: 28983783 DOI: 10.1007/s00726-017-2496-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 09/21/2017] [Indexed: 10/18/2022]
Abstract
Mechanistic target of rapamycin complex1 (mTORC1) activation and protein synthesis varied with methionine sources; however, the related mechanisms are largely unknown. Porcine mammary epithelial cells (PMEC) and mammary tissue slices (MTS) were used to test whether methionine precursors differ in providing the available methionine and thus differ in mTORC1 signaling-associated protein synthesis. PMEC with methionine deprivation for 8 h and MTS from lactating sows were cultured for 24 and 2 h, respectively, with treatment media without methionine (negative control, NC) or supplemented with 0.6 mM (for PMEC) and 0.1 mM (for MTS) of L-methionine (L-MET), D-methionine (D-MET), DL-2-hydroxy-4-(methylthio) butyric acid (HMTBA), or keto-methyl(thio)butanoic acid (KMB). The measurements included: phosphorylation of mTORC1 signaling, fractional protein synthesis rate (FSR), amino acids (AA) profile, and enzyme activities. Compared with the NC treatment, activated mTORC1 signaling as manifested by higher (P < 0.05) protein abundance of phosphorylated-S6 Kinase 1 (P-S6K1) and phosphorylated-4E-binding Protein 1 (P-4E-BP1) in PMEC and MTS, and increased protein synthesis as indicated by higher (P < 0.05) FSR in MTS occurred in L-MET and HMTBA treatments rather than in D-MET treatment. Compared with the NC treatment, methionine concentration and ratio of methionine to lysine in MTS increased (P < 0.05) in L-MET and HMTBA treatments but not in D-MET treatment, and activities of enzymes responsible for conversion of D-MET and HMTBA to keto-methionine in mammary tissues were about 10 and 50%, respectively, of that in liver. Taken together, mTORC1 signaling-associated protein synthesis in porcine mammary glands was regulated by the local available methionine depending on methionine sources.
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Affiliation(s)
- Yalin Zhang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Peng Wang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Sen Lin
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | | | - Huajun Yin
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Yumo Song
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Xiaoling Zhang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Lianqiang Che
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Yan Lin
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Shengyu Xu
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Bin Feng
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - De Wu
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China
| | - Zhengfeng Fang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China.
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20
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Hillreiner M, Müller NI, Koch HM, Schmautz C, Küster B, Pfaffl MW, Kliem H. Establishment of a 3D cell culture model of primary bovine mammary epithelial cells extracted from fresh milk. In Vitro Cell Dev Biol Anim 2017. [PMID: 28643224 DOI: 10.1007/s11626-017-0169-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
For the investigation of molecular processes underlying diseases of the bovine mammary gland, primary bovine mammary epithelial cells (pbMEC) are used. They are known to contribute to the innate immune system of the bovine mammary gland. The functionality of pbMEC depends on the maintenance of in vivo characteristics. So far, the optimization of pbMEC culture conditions was intended in a variety of experiments. For this purpose, most of the studies used stable cell lines or primary cells obtained from udder biopsies of slaughtered animals. By contrast, within our study, pbMEC of healthy and first lactating Brown Swiss cows were non-invasively isolated from fresh milk. The non-invasively isolated pbMEC were cultivated on the extracellular matrix-like scaffold Matrigel®. Further, they were challenged with different compositions of proliferation media, containing lactogenic hormones and/or the essential amino acid L-lysine. Changes in expression levels of genes coding for milk proteins and for components of the janus kinase/signal transducers and activators of transcription (JAK-STAT) and mTOR pathways were analyzed by RT-qPCR. The secreted proteins were analyzed by LC-MS/MS measurements. We showed for the first time the establishment of a physiologically functional 3D cell culture model of pbMEC isolated from fresh milk. This represents a primary cell culture model system, based on non-invasive cell collection, that can be used to unravel physiological processes in an unbiased manner.
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Affiliation(s)
- Maria Hillreiner
- Chair of Animal Physiology and Immunology, Technische Universität München, Freising, Germany
| | - Nadine I Müller
- Chair of Animal Physiology and Immunology, Technische Universität München, Freising, Germany
| | - Heiner M Koch
- Chair of Proteomics and Bioanalytics, Technische Universität München, Freising, Germany
| | - Christiane Schmautz
- Chair of Animal Physiology and Immunology, Technische Universität München, Freising, Germany
| | - Bernhard Küster
- Chair of Proteomics and Bioanalytics, Technische Universität München, Freising, Germany.,Bavarian Biomolecular Mass Spectrometry Center, Technische Universität München, Freising, Germany
| | - Michael W Pfaffl
- Chair of Animal Physiology and Immunology, Technische Universität München, Freising, Germany
| | - Heike Kliem
- Chair of Animal Physiology and Immunology, Technische Universität München, Freising, Germany.
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21
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Li SS, Loor JJ, Liu HY, Liu L, Hosseini A, Zhao WS, Liu JX. Optimal ratios of essential amino acids stimulate β-casein synthesis via activation of the mammalian target of rapamycin signaling pathway in MAC-T cells and bovine mammary tissue explants. J Dairy Sci 2017; 100:6676-6688. [PMID: 28571990 DOI: 10.3168/jds.2017-12681] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 04/17/2017] [Indexed: 12/26/2022]
Abstract
Amino acids are the building blocks of proteins and serve as key molecular components upstream of the signaling pathways that regulate protein synthesis. The objective of this study was to systematically investigate the effect of essential AA ratios on milk protein synthesis in vitro and to elucidate some of the underlying mechanisms. Triplicate cultures of MAC-T cells and bovine mammary tissue explants (MTE) were incubated with the optimal AA ratio (OPAA; Lys:Met, 2.9:1; Thr:Phe, 1.05:1; Lys:Thr, 1.8:1; Lys:His, 2.38:1; and Lys:Val, 1.23:1) in the presence of rapamycin (control), OPAA, a Lys:Thr ratio of 2.1:1, a Lys:Thr ratio of 1.3:1, a Lys:His ratio of 3.05:1, or a Lys:Val ratio of 1.62:1 for 12 h; the other AA concentrations were equal to OPAA. In some experiments, the cells were cultured with OPAA with or without rapamycin (100 ng/mL) or with mammalian target of rapamycin (mTOR) small interference RNA, and the MTE were exposed to OPAA with rapamycin for β-casein expression. Among the treatments, the expression of β-casein was greatest in the MTE cultured with OPAA. In MAC-T cells, the OPAA upregulated the mRNA expression of SLC1A5 and SLC7A5 but downregulated the expression of IRS1, AKT3, EEF1A1, and EEF2 compared with the control. The OPAA had no effect on the mTOR phosphorylation status but increased the phosphorylation of S6K1 and RPS6. When the MTE were treated with rapamycin in the presence of OPAA, the expression of β-casein was markedly decreased. The phosphorylation of RPS6 and 4EBP1 also was reduced in MAC-T cells. A similar negative effect on the expression of RPS6KB1 and EIF4EBP1 was detected when the cells were cultured with either rapamycin or mTOR small interference RNA. The optimal AA ratio stimulated β-casein expression partly by enhancing the transport of AA into the cells, cross-talk with insulin signaling and a subsequent enhancement of mTOR signaling, or translation elongation in both MAC-T cells and bovine MTE.
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Affiliation(s)
- S S Li
- Institute of Dairy Science, College of Animal Sciences, MoE Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, P. R. China
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
| | - H Y Liu
- Institute of Dairy Science, College of Animal Sciences, MoE Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, P. R. China
| | - L Liu
- Institute of Dairy Science, College of Animal Sciences, MoE Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, P. R. China
| | - A Hosseini
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - W S Zhao
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - J X Liu
- Institute of Dairy Science, College of Animal Sciences, MoE Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, P. R. China.
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22
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Li S, Wang Q, Lin X, Jin X, Liu L, Wang C, Chen Q, Liu J, Liu H. The Use of "Omics" in Lactation Research in Dairy Cows. Int J Mol Sci 2017; 18:ijms18050983. [PMID: 28475129 PMCID: PMC5454896 DOI: 10.3390/ijms18050983] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 04/17/2017] [Accepted: 04/25/2017] [Indexed: 02/07/2023] Open
Abstract
“Omics” is the application of genomics, transcriptomics, proteomics, and metabolomics in biological research. Over the years, tremendous amounts of biological information has been gathered regarding the changes in gene, mRNA and protein expressions as well as metabolites in different physiological conditions and regulations, which has greatly advanced our understanding of the regulation of many physiological and pathophysiological processes. The aim of this review is to comprehensively describe the advances in our knowledge regarding lactation mainly in dairy cows that were obtained from the “omics” studies. The “omics” technologies have continuously been preferred as the technical tools in lactation research aiming to develop new nutritional, genetic, and management strategies to improve milk production and milk quality in dairy cows.
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Affiliation(s)
- Shanshan Li
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Quanjuan Wang
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Xiujuan Lin
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Xiaolu Jin
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Lan Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Caihong Wang
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Qiong Chen
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Jianxin Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Hongyun Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
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23
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Yu C, Luo C, Gu X, Zang Y, Qu B, Khudhair N, Li Q, Gao X. 14-3-3γaffects eIF5 to regulateβ-casein synthesis in bovine mammary epithelial cells. CANADIAN JOURNAL OF ANIMAL SCIENCE 2016. [DOI: 10.1139/cjas-2016-0038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The 14-3-3γ protein participates in many biological processes; however, its regulatory mechanism in milk protein synthesis is not well studied. We hypothesized that 14-3-3γ might affect eIF5 (an initiation factor) to regulate β-casein synthesis in dairy cows. In this study, a possible interaction between 14-3-3γ and eIF5 was investigated using bovine mammary epithelial cells (BMECs). The expression levels of 14-3-3γ and eIF5 in the mammary gland tissues from cows producing higher quality milk were higher than those from cows producing low-quality milk. Moreover, the expression of 14-3-3γ, eIF5, and β-casein were increased at both mRNA and protein levels in BMECs cultured in vitro with methionine (Met) supplementation. Coimmunoprecipitation, colocalization, and FRET analysis further showed the evidences that 14-3-3γ physically bound to eIF5 in BMECs. Gene function studies revealed that 14-3-3γ positively regulated eIF5 through alteration of eIF2α/p-eIF2α ratio. Collectively, our data suggest that 14-3-3γ regulates β-casein translation in BMECs through interaction with eIF5.
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Affiliation(s)
- Cuiping Yu
- School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, People’s Republic of China
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
| | - Chaochao Luo
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
| | - Xinyu Gu
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
| | - Yanli Zang
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
| | - Bo Qu
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
| | - Nagam Khudhair
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
| | - Qingzhang Li
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
| | - Xuejun Gao
- Key Laboratory of Agricultural Biologically Functional Genes, Northeast Agricultural University, Harbin 150030, People’s Republic of China
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24
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Liu L, Lin Y, Liu L, Wang L, Bian Y, Gao X, Li Q. Regulation of peroxisome proliferator-activated receptor gamma on milk fat synthesis in dairy cow mammary epithelial cells. In Vitro Cell Dev Biol Anim 2016; 52:1044-1059. [DOI: 10.1007/s11626-016-0059-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 05/18/2016] [Indexed: 12/26/2022]
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25
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Osorio JS, Lohakare J, Bionaz M. Biosynthesis of milk fat, protein, and lactose: roles of transcriptional and posttranscriptional regulation. Physiol Genomics 2016; 48:231-56. [DOI: 10.1152/physiolgenomics.00016.2015] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The demand for high-quality milk is increasing worldwide. The efficiency of milk synthesis can be improved by taking advantage of the accumulated knowledge of the transcriptional and posttranscriptional regulation of genes coding for proteins involved in the synthesis of fat, protein, and lactose in the mammary gland. Research in this area is relatively new, but data accumulated in the last 10 years provide a relatively clear picture. Milk fat synthesis appears to be regulated, at least in bovines, by an interactive network between SREBP1, PPARγ, and LXRα, with a potential role for other transcription factors, such as Spot14, ChREBP, and Sp1. Milk protein synthesis is highly regulated by insulin, amino acids, and amino acid transporters via transcriptional and posttranscriptional routes, with the insulin-mTOR pathway playing a central role. The transcriptional regulation of lactose synthesis is still poorly understood, but it is clear that glucose transporters play an important role. They can also cooperatively interact with amino acid transporters and the mTOR pathway. Recent data indicate the possibility of nutrigenomic interventions to increase milk fat synthesis by feeding long-chain fatty acids and milk protein synthesis by feeding amino acids. We propose a transcriptional network model to account for all available findings. This model encompasses a complex network of proteins that control milk synthesis with a cross talk between milk fat, protein, and lactose regulation, with mTOR functioning as a central hub.
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Affiliation(s)
| | - Jayant Lohakare
- Oregon State University, Corvallis, Oregon; and
- Kangwon National University, Chuncheon, South Korea
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26
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Liu L, Zhang LI, Lin YE, Bian Y, Gao X, Qu BO, Li Q. 14-3-3γ regulates cell viability and milk fat synthesis in lipopolysaccharide-induced dairy cow mammary epithelial cells. Exp Ther Med 2016; 11:1279-1287. [PMID: 27073437 PMCID: PMC4812431 DOI: 10.3892/etm.2016.3029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 12/22/2015] [Indexed: 12/27/2022] Open
Abstract
Our previous study demonstrated that 14-3-3γ overexpression was able to inhibit the production of lipopolysaccharide (LPS)-induced cytokines in dairy cow mammary epithelial cells (DCMECs) by inhibiting the activation of nuclear factor-κB (NF-κB) signaling pathways. However, the association between 14-3-3γ overexpression and milk fat synthesis in LPS-induced DCMECs remains unclear. Therefore, the present study investigated the effect of 14-3-3γ on cell viability and milk fat synthesis in LPS-induced DCMECs. The results of the MTT assay and lactate dehydrogenase activity assay demonstrated that 14-3-3γ overexpression was able to attenuate LPS-induced cytotoxicity in DCMECs, and increase the viability of the cells. In addition, the results of reverse transcription-quantitative polymerase chain reaction suggested that mRNA expression levels of genes associated with milk fat synthesis, including sterol regulatory element binding protein (SREBP1), peroxisome proliferator-activated receptor-γ (PPARG), cluster of differentiation 36, acetyl-coA carboxylase (ACC), fatty acid synthase (FAS) and fatty acid binding protein-3, were significantly upregulated in cells overexpressing the 14-3-3γ protein. In addition, as compared with the LPS-treated group, the activities of FAS and ACC were significantly increased. Furthermore, western blotting demonstrated that 14-3-3γ overexpression enhanced the protein expression levels of phosphorylated SREBP1 and PPARG. These results suggested that high levels of 14-3-3γ protein were able to attenuate LPS-induced cell damage and promote milk fat synthesis in LPS-induced DCMECs by increasing the cell viability and upregulating the expression levels of transcription factors associated with milk fat synthesis.
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Affiliation(s)
- Lixin Liu
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China; College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, P.R. China
| | - L I Zhang
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Y E Lin
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Yanjie Bian
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Xuejun Gao
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - B O Qu
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Qingzhang Li
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
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27
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Jiang N, Hu L, Liu C, Gao X, Zheng S. 60S ribosomal protein L35 regulates β-casein translational elongation and secretion in bovine mammary epithelial cells. Arch Biochem Biophys 2015; 583:130-9. [PMID: 26297660 DOI: 10.1016/j.abb.2015.08.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 08/13/2015] [Accepted: 08/16/2015] [Indexed: 11/18/2022]
Abstract
60S ribosomal protein L35 (RPL35) is an important component of the 60S ribosomal subunit and has a role in protein translation and endoplasmic reticulum (ER) docking. However, few studies have investigated RPL35 in eukaryotes and much remains to be learned. Here, we analyzed the function of RPL35 in β-casein (CSN2) synthesis and secretion in bovine mammary epithelial cells (BMECs). We found that methionine (Met) could promote the expressions of CSN2 and RPL35. Analysis of overexpression and inhibition of RPL35 confirmed that it could mediate the Met signal and regulate CSN2 expression. The mechanism of CSN2 regulation by RPL35 was analyzed by coimmunoprecipitation (Co-IP), colocalization, fluorescence resonance energy transfer (FRET) and gene mutation. We found that RPL35 could control ribosome translational elongation during synthesis of CSN2 by interacting with eukaryotic translational elongation factor 2 (eEF2), and that eEF2 was the signaling molecule downstream of RPL35 controlling this process. RPL35 could also control the secretion of CSN2 by locating it to the ER. Taken together, these results revealed that, RPL35 was an important positive regulatory factor involving in the Met-mediated regulation of CSN2 translational elongation and secretion.
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Affiliation(s)
- Nan Jiang
- College of Life Science and Technology, Dalian University, Dalian Economic Technological Development Zone, Liaoning, 116622, China; The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultura University, Xiangfang District, Harbin, 150030, China.
| | - Lijun Hu
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultura University, Xiangfang District, Harbin, 150030, China.
| | - Chaonan Liu
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultura University, Xiangfang District, Harbin, 150030, China.
| | - Xueli Gao
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultura University, Xiangfang District, Harbin, 150030, China.
| | - Shimin Zheng
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultura University, Xiangfang District, Harbin, 150030, China.
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28
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Jiang N, Wang Y, Yu Z, Hu L, Liu C, Gao X, Zheng S. WISP3 (CCN6) Regulates Milk Protein Synthesis and Cell Growth Through mTOR Signaling in Dairy Cow Mammary Epithelial Cells. DNA Cell Biol 2015; 34:524-33. [DOI: 10.1089/dna.2015.2829] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Nan Jiang
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Yu Wang
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Zhiqiang Yu
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Lijun Hu
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Chaonan Liu
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Xueli Gao
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Shimin Zheng
- The Laboratory of Pathophysiology in College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
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29
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Liu L, Lin Y, Liu L, Bian Y, Zhang L, Gao X, Li Q. 14-3-3γ Regulates Lipopolysaccharide-Induced Inflammatory Responses and Lactation in Dairy Cow Mammary Epithelial Cells by Inhibiting NF-κB and MAPKs and Up-Regulating mTOR Signaling. Int J Mol Sci 2015. [PMID: 26204835 PMCID: PMC4519969 DOI: 10.3390/ijms160716622] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
As a protective factor for lipopolysaccharide (LPS)-induced injury, 14-3-3γ has been the subject of recent research. Nevertheless, whether 14-3-3γ can regulate lactation in dairy cow mammary epithelial cells (DCMECs) induced by LPS remains unknown. Here, the anti-inflammatory effect and lactation regulating ability of 14-3-3γ in LPS-induced DCMECs are investigated for the first time, and the molecular mechanisms responsible for their effects are explored. The results of qRT-PCR showed that 14-3-3γ overexpression significantly inhibited the mRNA expression of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), interleukin-1β (IL-1β) and inducible nitric oxide synthase (iNOS). Enzyme-linked immunosorbent assay (ELISA) analysis revealed that 14-3-3γ overexpression also suppressed the production of TNF-α and IL-6 in cell culture supernatants. Meanwhile, CASY-TT Analyser System showed that 14-3-3γ overexpression clearly increased the viability and proliferation of cells. The results of kit methods and western blot analysis showed that 14-3-3γ overexpression promoted the secretion of triglycerides and lactose and the synthesis of β-casein. Furthermore, the expression of genes relevant to nuclear factor-κB (NF-κB) and mitogen-activated protein kinase (MAPKs) and lactation-associated proteins were assessed by western blot, and the results suggested that 14-3-3γ overexpression inactivated the NF-κB and MAPK signaling pathways by down-regulating extracellular signal regulated protein kinase (ERK), p38 mitogen-activated protein kinase (p38MAPK) and inhibitor of NF-κB (IκB) phosphorylation levels, as well as by inhibiting NF-κB translocation. Meanwhile, 14-3-3γ overexpression enhanced the expression levels of β-casein, mammalian target of rapamycin (mTOR), ribosomal protein S6 kinase 1 (S6K1), serine/threonine protein kinase Akt 1 (AKT1), sterol regulatory element binding protein 1 (SREBP1) and peroxisome proliferator-activated receptor gamma (PPARγ). These results suggest that 14-3-3γ was able to attenuate the LPS-induced inflammatory responses and promote proliferation and lactation in LPS-induced DCMECs by inhibiting the activation of the NF-κB and MAPK signaling pathways and up-regulating mTOR signaling pathways to protect against LPS-induced injury.
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Affiliation(s)
- Lixin Liu
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin 150030, China.
| | - Ye Lin
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin 150030, China.
| | - Lili Liu
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin 150030, China.
| | - Yanjie Bian
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin 150030, China.
| | - Li Zhang
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin 150030, China.
| | - Xuejun Gao
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin 150030, China.
| | - Qingzhang Li
- Key Laboratory of Dairy Science of Education Ministry, Northeast Agricultural University, Harbin 150030, China.
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30
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Li SS, Shen JS, Ren DX, Liu JX. Effects of the processing methods of corn grain and soybean meal on milk protein expression profiles in dairy cows. Animal 2015; 9:267-74. [PMID: 25230338 DOI: 10.1017/s1751731114002225] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
A proteomic approach was used to investigate the effects of the processing method of corn grain and soybean meal on the milk protein expression profile in lactating dairy cows. A total of 12 multiparous Holstein dairy cows were used in a 4×4 Latin square design with a 2×2 factorial arrangement. The primary factors examined were corn (finely ground (FGC) v. steam-flaked (SFC)) and soybean meal (solvent-extracted (SSBM) v. heat-treated (HSBM)), which were used to formulate four diets with the same basal ingredient: 27% FGC and 9% SSBM; 27% SFC and 9% SSBM; 27% FGC and 9% HSBM; and 27% SFC and 9% HSBM. Each period lasted for 21 days. Milk samples were collected on days 18, 19 and 20 of each period. Changes in the milk proteins were assessed by two-dimensional (2D) electrophoresis and ImageMaster 2D Platinum 6.0 software. A total of 13 spots displayed variations in protein spot abundance according to the statistical analysis. These spots were identified by a matrix-assisted laser desorption/ionization-time of flight/time of flight MS. According to the gels, the relative abundance of α(s2)-casein (CN) fragments was higher in the cows fed the SFC-HSBM than that for SFC-SSBM, whereas β-CN, α-lactalbumin and zinc-alpha-2-glycoprotein fragments were down-regulated in HSBM-fed cows. The relative decrease of β-CN expression was validated by western blot and agreed with the MS data. These results suggested that the method used to process soybean meal modified the synthesis and secretion of milk proteins in lactating dairy cows' mammary glands.
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Affiliation(s)
- S S Li
- Institute of Dairy Science,College of Animal Sciences,Zhejiang University,Yuhangtang Road 866,Hangzhou,Zhejiang 310058,P. R. China
| | - J S Shen
- Institute of Dairy Science,College of Animal Sciences,Zhejiang University,Yuhangtang Road 866,Hangzhou,Zhejiang 310058,P. R. China
| | - D X Ren
- Institute of Dairy Science,College of Animal Sciences,Zhejiang University,Yuhangtang Road 866,Hangzhou,Zhejiang 310058,P. R. China
| | - J X Liu
- Institute of Dairy Science,College of Animal Sciences,Zhejiang University,Yuhangtang Road 866,Hangzhou,Zhejiang 310058,P. R. China
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31
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Yu C, Luo C, Qu B, Khudhair N, Gu X, Zang Y, Wang C, Zhang N, Li Q, Gao X. Molecular network including eIF1AX, RPS7, and 14-3-3γ regulates protein translation and cell proliferation in bovine mammary epithelial cells. Arch Biochem Biophys 2014; 564:142-55. [DOI: 10.1016/j.abb.2014.09.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 09/21/2014] [Accepted: 09/23/2014] [Indexed: 02/07/2023]
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32
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Function of SREBP1 in the milk fat synthesis of dairy cow mammary epithelial cells. Int J Mol Sci 2014; 15:16998-7013. [PMID: 25250914 PMCID: PMC4200870 DOI: 10.3390/ijms150916998] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Revised: 08/23/2014] [Accepted: 09/04/2014] [Indexed: 02/07/2023] Open
Abstract
Sterol regulatory element-binding proteins (SREBPs) belong to a family of nuclear transcription factors. The question of which is the most important positive regulator in milk fat synthesis in dairy cow mammary epithelial cells (DCMECs) between SREBPs or other nuclear transcription factors, such as peroxisome proliferator-activated receptor γ (PPARγ), remains a controversial one. Recent studies have found that mTORC1 (the mammalian target of rapamycin C1) regulates SREBP1 to promote fat synthesis. Thus far, however, the interaction between the SREBP1 and mTOR (the mammalian target of rapamycin) pathways in the regulation of milk fat synthesis remains poorly understood. This study aimed to identify the function of SREBP1 in milk fat synthesis and to characterize the relationship between SREBP1 and mTOR in DCMECs. The effects of SREBP1 overexpression and gene silencing on milk fat synthesis and the effects of stearic acid and serum on SREBP1 expression in the upregulation of milk fat synthesis were investigated in DCMECs using immunostaining, Western blotting, real-time quantitative PCR, lipid droplet staining, and detection kits for triglyceride content. SREBP1 was found to be a positive regulator of milk fat synthesis and was shown to be regulated by stearic acid and serum. These findings indicate that SREBP1 is the key positive regulator in milk fat synthesis.
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Zhang X, Zhao F, Si Y, Huang Y, Yu C, Luo C, Zhang N, Li Q, Gao X. GSK3β regulates milk synthesis in and proliferation of dairy cow mammary epithelial cells via the mTOR/S6K1 signaling pathway. Molecules 2014; 19:9435-52. [PMID: 24995926 PMCID: PMC6271057 DOI: 10.3390/molecules19079435] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 06/22/2014] [Accepted: 06/27/2014] [Indexed: 01/01/2023] Open
Abstract
Glycogen synthase kinase 3 (GSK3) is a serine/threonine kinase, whose activity is inhibited by AKT phosphorylation. This inhibitory phosphorylation of GSK3β can in turn play a regulatory role through phosphorylation of several proteins (such as mTOR, elF2B) to promote protein synthesis. mTOR is a key regulator in protein synthesis and cell proliferation, and recent studies have shown that both GSK3β and mTORC1 can regulate SREBP1 to promote fat synthesis. Thus far, however, the cross talk between GSK3β and the mTOR pathway in the regulation of milk synthesis and associated cell proliferation is not well understood. In this study the interrelationship between GSK3β and the mTOR/S6K1 signaling pathway leading to milk synthesis and proliferation of dairy cow mammary epithelial cells (DCMECs) was analyzed using techniques including GSK3β overexpression by transfection, GSK3β inhibition, mTOR inhibition and methionine stimulation. The analyses revealed that GSK3β represses the mTOR/S6K1 pathway leading to milk synthesis and cell proliferation of DCMECs, whereas GSK3β phosphorylation enhances this pathway. Conversely, the activated mTOR/S6K1 signaling pathway downregulates GSK3β expression but enhances GSK3β phosphorylation to increase milk synthesis and cell proliferation, whereas inhibition of mTOR leads to upregulation of GSK3β and repression of GSK3β phosphorylation, which in turn decreases milk synthesis, and cell proliferation. These findings indicate that GSK3β and phosphorylated GSK3β regulate milk synthesis and proliferation of DCMECs via the mTOR/S6K1 signaling pathway. These findings provide new insight into the mechanisms of milk synthesis.
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Affiliation(s)
- Xia Zhang
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Feng Zhao
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Yu Si
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Yuling Huang
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Cuiping Yu
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Chaochao Luo
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Na Zhang
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Qingzhang Li
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Xuejun Gao
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
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Liang MY, Hou XM, Qu B, Zhang N, Li N, Cui YJ, Li QZ, Gao XJ. Functional analysis of FABP3 in the milk fat synthesis signaling pathway of dairy cow mammary epithelial cells. In Vitro Cell Dev Biol Anim 2014; 50:865-73. [DOI: 10.1007/s11626-014-9780-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 05/15/2014] [Indexed: 12/22/2022]
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Wang L, Lin Y, Bian Y, Liu L, Shao L, Lin L, Qu B, Zhao F, Gao X, Li Q. Leucyl-tRNA synthetase regulates lactation and cell proliferation via mTOR signaling in dairy cow mammary epithelial cells. Int J Mol Sci 2014; 15:5952-69. [PMID: 24722568 PMCID: PMC4013607 DOI: 10.3390/ijms15045952] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 03/28/2014] [Accepted: 03/28/2014] [Indexed: 01/06/2023] Open
Abstract
The role of LeuRS, an aminoacyl-tRNA synthetase, as an intracellular l-leucine sensor for the mTORC1 pathway has been the subject of much research recently. Despite this, the association between LeuRS and lactation in dairy cow mammary epithelial cells (DCMECs) remains unknown. In this study, we found that LeuRS expression in mammary gland tissue was significantly higher during lactation than pregnancy. Moreover, our data demonstrates that LeuRS is localized in the cytoplasm. Treatment with leucine increased DCMECs viability and proliferation, as well as mammalian target of rapamycin (mTOR), p-mTOR, ribosomal protein S6 kinase 1 (S6K1), p-S6K1, β-Casein, sterol regulatory element binding protein 1c (SREBP-1c), glucose transporter 1 (GLUT1), and Cyclin D1 mRNA and protein expression. Secretion of lactose and triglyceride were also increased. siRNA-mediated knockdown of LeuRS led to reduction in all of these processes. Based on these data, LeuRS up-regulates the mTOR pathway to promote proliferation and lactation of DCMECs in response to changes in the intracellular leucine concentration.
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Affiliation(s)
- Lina Wang
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Ye Lin
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Yanjie Bian
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Lili Liu
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Li Shao
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Lin Lin
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Bo Qu
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Feng Zhao
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Xuejun Gao
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
| | - Qingzhang Li
- Key Laboratory of Dairy Science of Ministry of Education, Northeast Agricultural University, Harbin 150030, China.
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SOCS3-mediated blockade reveals major contribution of JAK2/STAT5 signaling pathway to lactation and proliferation of dairy cow mammary epithelial cells in vitro. Molecules 2013; 18:12987-3002. [PMID: 24141248 PMCID: PMC6270101 DOI: 10.3390/molecules181012987] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/21/2013] [Accepted: 09/30/2013] [Indexed: 12/27/2022] Open
Abstract
Suppressor of cytokine signaling 3 (SOCS3) is a cytokine-induced negative feedback-loop regulator of cytokine signaling. More and more evidence has proved it to be an inhibitor of signal transducers and activators of transcription 5 (STAT5). Here, we used dairy cow mammary epithelial cells (DCMECs) to analyze the function of SOCS3 and the interaction between SOCS3 and STAT5a. The expression of SOCS3 was found in cytoplasm and nucleus of DCMECs by fluorescent immunostaining. Overexpression and inhibition of SOCS3 brought a remarkable milk protein synthesis change through the regulation of JAK2/STAT5a pathway activity, and SOCS3 expression also decreased SREBP-1c expression and fatty acid synthesis. Inhibited STAT5a activation correlated with reduced SOCS3 expression, which indicated that SOCS3 gene might be one of the targets of STAT5a activation, DCMECs treated with L-methionine (Met) resulted in a decrease of SOCS3 expression. SOCS3 could also decrease cell proliferation and viability by CASY-TT detection. Together, our findings indicate that SOCS3 acts as an inhibitor of JAK2/STAT5a pathway and disturbs fatty acid synthesis by decreasing SREBP-1c expression, which validates its involvement in both milk protein synthesis and fat synthesis. In aggregate, these results reveal that low SOCS3 expression is required for milk synthesis and proliferation of DCMECs in vitro.
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