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Hanigan MD, Souza VC, Martineau R, Lapierre H, Feng X, Daley VL. A meta-analysis of the relationship between milk protein production and absorbed amino acids and digested energy in dairy cattle. J Dairy Sci 2024; 107:5587-5615. [PMID: 38490550 DOI: 10.3168/jds.2024-24230] [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: 09/24/2023] [Accepted: 02/09/2024] [Indexed: 03/17/2024]
Abstract
Milk protein production is the largest draw on AA supplies for lactating dairy cattle. Prior NRC predictions of milk protein production have been absorbed protein (MP)-based and used a first-limiting nutrient concept to integrate the effects of energy and protein, which yielded poor accuracy and precision (root mean squared error [RMSE] >21%). Using a meta-data set gathered, various alternative equation forms considering MP, absorbed total EAA, absorbed individual EAA, and digested energy (DE) supplies as additive drivers of production were evaluated, and all were found to be superior in statistical performance to the first limitation approach (RMSE = 14%-15%). Inclusion of DE intake and a quadratic term for MP or absorbed EAA supplies were found to be necessary to achieve intercept estimates (nonproductive protein use) that were similar to the factorial estimates of the National Academies of Sciences, Engineering, and Medicine (2021). The partial linear slope for MP was found to be 0.409, which is consistent with the observed slope bias of -0.34 g/g when a slope of 0.67 was used for MP efficiency in a first-limiting nutrient system. Replacement of MP with the supplies of individual absorbed EAA expressed in grams per day and a common quadratic across the EAA resulted in unbiased predictions with improved statistical performance as compared with MP-based models. Based on Akaike's information criterion and biological consistency, the best equations included absorbed His, Ile, Lys, Met, Thr, the NEAA, and individual DE intakes from fatty acids, NDF, residual OM, and starch. Several also contained a term for absorbed Leu. These equations generally had RMSE of 14.3% and a concordance correlation of 0.76. Based on the common quadratic and individual linear terms, milk protein response plateaus were predicted at approximately 320 g/d of absorbed His, Ile, and Lys; 395 g/d of absorbed Thr; 550 g/d of absorbed Met; and 70 g/d of absorbed Leu. Therefore, responses to each except Leu are almost linear throughout the normal in vivo range. De-aggregation of the quadratic term and parsing to individual absorbed EAA resulted in nonbiological estimates for several EAA indicating over-parameterization. Expression of the EAA as g/100 g total absorbed EAA or as ratios of DE intake and using linear and quadratic terms for each EAA resulted in similar statistical performance, but the solutions had identifiability problems and several nonbiological parameter estimates. The use of ratios also introduced nonlinearity in the independent variables which violates linear regression assumptions. Further screening of the global model using absorbed EAA expressed as grams per day with a common quadratic using an all-models approach, and exhaustive cross-evaluation indicated the parameter estimates for BW, all 4 DE terms, His, Ile, Lys, Met, and the common quadratic term were stable, whereas estimates for Leu and Thr were known with less certainty. Use of independent and additive terms and a quadratic expression in the equation results in variable efficiencies of conversion. The additivity also provides partial substitution among the nutrients. Both of these prevent establishment of fixed nutrient requirements in support of milk protein production.
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Affiliation(s)
- M D Hanigan
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061.
| | - V C Souza
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061
| | - R Martineau
- Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8
| | - H Lapierre
- Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8
| | - X Feng
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061
| | - V L Daley
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061
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Guo Y, Fan Z, Li M, Xie H, Peng L, Yang C. Effects of Sodium Nitrate and Coated Methionine on Lactation Performance, Rumen Fermentation Characteristics, Amino Acid Metabolism, and Microbial Communities in Lactating Buffaloes. Microorganisms 2023; 11:675. [PMID: 36985248 PMCID: PMC10057408 DOI: 10.3390/microorganisms11030675] [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: 01/11/2023] [Revised: 02/11/2023] [Accepted: 03/02/2023] [Indexed: 03/09/2023] Open
Abstract
Sodium nitrate is used as a non-protein nitrogen supplement while methionine is considered as a common methionine additive for ruminants. This study investigated the effects of sodium nitrate and coated methionine supplementation on milk yield, milk composition, rumen fermentation parameters, amino acid composition, and rumen microbial communities in lactating buffaloes. Forty mid-lactation multiparous Murrah buffaloes within the initial days in milk (DIM) = 180.83 ± 56.78 d, milk yield = 7.63 ± 0.19 kg, body weight = 645 ± 25 kg were selected and randomly allocated into four groups (N = 10). All of animals received the same total mixed ratio (TMR) diet. Furthermore, the groups were divided into the control group (CON), 70 g/d sodium nitrate group (SN), 15 g/d palmitate coated L-methionine group (MET), and 70 g/d sodium nitrate +15 g/d palmitate coated L-methionine group (SN+MET). The experiment lasted for six weeks, including two weeks of adaption. The results showed that most rumen-free amino acids, total essential amino acids, and total amino acids in Group SN increased (p < 0.05), while the dry matter intake (DMI) and rumen acetate, propionate, valerate, and total volatile fatty acids (TVFA) in Group MET decreased (p < 0.05). However, there was no significant difference in milk yield, milk protein, milk fat, lactose, total solid content, and sodium nitrate residue in milk among groups (p > 0.05). Group SN+MET had a decreased rumen propionate and valerate (p < 0.05), while increasing the Ace, Chao, and Simpson indices of alpha diversity of rumen bacteria. Proteobacteria and Actinobacteriota were significantly increased (p < 0.05) in Group SN+MET, but Bacteroidota, and Spirochaetota were decreased (p < 0.05). In addition, Group SN+MET also increased the relative abundance of Acinetobacter, Lactococcus, Microbacterium, Chryseobacterium, and Klebsiella, which were positively correlated with cysteine and negatively correlated with rumen acetate, propionate, valerate, and TVFA. Rikenellaceae_RC9_gut_group was identified as a biomarker in Group SN. Norank_f__UCG-011 was identified as a biomarker in Group MET. Acinetobacter, Kurthia, Bacillus, and Corynebacterium were identified as biomarkers in Group SN+MET. In conclusion, sodium nitrate increased rumen free amino acids, while methionine decreased dry matter intake (DMI) and rumen volatile fatty acids. The combined use of sodium nitrate and methionine enriched the species abundance of microorganisms in the rumen and affected the composition of microorganisms in the rumen. However, sodium nitrate, methionine, and their combination had no significant effect on the milk yield and milk composition. It was suggested that the combined use of sodium nitrate and methionine in buffalo production was more beneficial.
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Affiliation(s)
| | | | | | | | | | - Chengjian Yang
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Guangxi, Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning 530001, China
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Redifer CA, Loy DD, Youngs CR, Wang C, Meyer AM, Tucker HA, Gunn PJ. Evaluation of peripartum supplementation of methionine hydroxy analogue on beef cow-calf performance. Transl Anim Sci 2023; 7:txad046. [PMID: 37256190 PMCID: PMC10226683 DOI: 10.1093/tas/txad046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 05/05/2023] [Indexed: 06/01/2023] Open
Abstract
The objective was to evaluate the effects of peripartum supplementation of a methionine hydroxy analogue (MHA) to primiparous, spring-calving beef females on dam and progeny performance. Angus heifers (n = 60) were blocked by expected parturition date, stratified by body weight (BW) and body condition score (BCS), and randomized to 1 of 15 pens. Pens were randomly assigned to 1 of 3 dietary treatments: a basal diet supplemented with 0 (M0), 15 (M15), or 30 (M30) g/animal/d of MHA (provided as MFP feed supplement, Novus International Inc., St. Charles, MO). Diets were fed from 45 ± 13 (SD) d pre-calving through 81 ± 13 d postpartum (DPP), after which all cow-calf pairs were managed as a single group on pasture until weaning (199 ± 13 DPP). Dam BW, BCS, and blood samples were taken at 6 predetermined timepoints. Progeny data were collected at birth, 2 intermediate timepoints, and at weaning. Milk samples were collected for composition analysis at 7 ± 2 DPP and at 55 ± 5 DPP. Serial progesterone samples were analyzed to establish resumption of cyclicity, and ultrasonography was performed at 55 ± 5 DPP to evaluate ovarian function. Cows were bred via artificial insemination at 82 ± 13 DPP and subsequently exposed to bulls for a 55-d breeding season. Pen was the experimental unit, and preplanned orthogonal contrasts were tested (linear effect and M0 vs. M15 + M30). Dam BW and BCS were not affected by treatment (P ≥ 0.29) throughout the study. Week 1 milk fat concentration increased linearly (P = 0.05) and total solids tended to increase linearly (P = 0.07) as MHA increased; however, no other milk components were affected (P ≥ 0.16). Treatment did not affect (P ≥ 0.16) dam reproductive parameters or progeny growth from birth until weaning. Post-calving, circulating methionine equivalents tended to linearly increase (P = 0.10) with increasing MHA supplementation. At breeding, plasma urea N linearly decreased (P = 0.03) with increased supplementation of MHA, and plasma non-esterified fatty acids were less (P = 0.04) in MHA-supplemented dams compared with dams receiving no MHA. Maternal circulating glucose, glutathione peroxidase, and thiobarbituric acid-reactive substances were not affected (P ≥ 0.15) by treatment at any point. These data indicate that peripartum supplementation of MHA may increase milk fat composition shortly after calving, but MHA supplementation did not improve progeny growth or dam reproductive performance in the current study.
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Affiliation(s)
- Colby A Redifer
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA
| | - Daniel D Loy
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA
| | - Curtis R Youngs
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA
| | - Chong Wang
- Department of Statistics, Iowa State University, Ames, IA 50011, USA
- Department of Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA 50011, USA
| | - Allison M Meyer
- Division of Animal Sciences, University of Missouri, Columbia, MO 65211, USA
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Chesini RG, Takiya CS, Dias MS, Silva TB, Nunes AT, Grigoletto NT, da Silva GG, Vittorazzi PC, Rennó LN, Rennó FP. Dietary replacement of soybean meal with heat-treated soybean meal or high-protein corn distillers grains on nutrient digestibility and milk composition in mid-lactation cows. J Dairy Sci 2022; 106:233-244. [DOI: 10.3168/jds.2022-21904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022]
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Regulation of Milk Protein Synthesis by Free and Peptide-Bound Amino Acids in Dairy Cows. BIOLOGY 2021; 10:biology10101044. [PMID: 34681143 PMCID: PMC8533557 DOI: 10.3390/biology10101044] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 11/17/2022]
Abstract
Milk protein (MP) synthesis in the mammary gland of dairy cows is a complex biological process. As the substrates for protein synthesis, amino acids (AAs) are the most important nutrients for milk synthesis. Free AAs (FAAs) are the main precursors of MP synthesis, and their supplies are supplemented by peptide-bound AAs (PBAAs) in the blood. Utilization of AAs in the mammary gland of dairy cows has attracted the great interest of researchers because of the goal of increasing MP yield. Supplying sufficient and balanced AAs is critical to improve MP concentration and yield in dairy cows. Great progress has been made in understanding limiting AAs and their requirements for MP synthesis in dairy cows. This review focuses on the effects of FAA and PBAA supply on MP synthesis and their underlying mechanisms. Advances in our knowledge in the field can help us to develop more accurate models to predict dietary protein requirements for dairy cows MP synthesis, which will ultimately improve the nitrogen utilization efficiency and lactation performance of dairy cows.
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Kihal A, Rodriguez-Prado M, Calsamiglia S. Relative bioavailability of 3 rumen-undegradable methionine sources in dairy cows using the area under the curve technique. JDS COMMUNICATIONS 2021; 2:182-185. [PMID: 36338446 PMCID: PMC9623782 DOI: 10.3168/jdsc.2020-0045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 03/21/2021] [Indexed: 12/31/2022]
Abstract
Plasma kinetics of 3 sources of metabolizable Met were tested. The two 2-hydroxy-4-(methylthio)butanoic isopropyl ester products (Kessent, Kemin Animal Nutrition and Health, KES; Metasmart, Adisseo SAS, MtS) had a similar pattern. Smartamine (Adisseo SAS, SmT) peaked later and had a greater area under the curve.
The objective of this study was to evaluate the relative bioavailability of two 2-hydroxy-4-(methylthio)butanoic isopropyl esters (HMBi) obtained through different production processes and an encapsulated rumen-protected Met using the area under the curve (AUC) method. The new HMBi product (Kessent MF Liquid, Kemin Animal Nutrition and Health) was compared with an existing HMBi product (Metasmart, Adisseo SAS) and a pH-sensitive coated Met (Smartamine, Adisseo SAS). Nine multiparous lactating cows (30 kg of milk/d and 227 d in milk) fed a 45:55 forage:concentrate diet were randomly assigned within square to a triplicate 3 × 3 Latin square design. Each period consisted of a 3-d sampling period and a 3-d washout period. Treatments were dosed on d 1 of each period, and blood samples were collected from the coccygeal vein at 0, 1, 2, 3, 4, 6, 9, 12, 24, 30, and 48 h thereafter. The daily dose was 50 g of Met equivalent of each treatment. The HMBi treatments were administered directly into the cow's mouth, whereas Smartamine was fed mixed with 0.5 kg of concentrate and fully consumed within 15 min. Nonlinear models were fitted to raw data, and the basal concentration at time 0 h, time at peak (Tmax), concentration at peak, and AUC of plasma Met were determined. The Met basal concentration at t = 0 h (26.7 ± 7.67 µM) and concentration at peak (210 ± 22.2 µM) were similar among treatments, but the Tmax (11.3 vs. 1.4 h) was delayed and the AUC was 1.8-fold larger (3,457 vs. 1,868 arbitrary units) in Smartamine compared with HMBi. Results of this study indicate that the 2 HMBi products have similar plasma kinetics and bioavailability. Smartamine had different kinetics compared with HMBi products, with delayed Tmax and larger AUC and relative bioavailability.
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Toledo MZ, Stangaferro ML, Gennari RS, Barletta RV, Perez MM, Wijma R, Sitko EM, Granados G, Masello M, Van Amburgh ME, Luchini D, Giordano JO, Shaver RD, Wiltbank MC. Effects of feeding rumen-protected methionine pre- and postpartum in multiparous Holstein cows: Lactation performance and plasma amino acid concentrations. J Dairy Sci 2021; 104:7583-7603. [PMID: 33865588 DOI: 10.3168/jds.2020-19021] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 02/18/2021] [Indexed: 12/16/2022]
Abstract
Objectives were to evaluate the effect of feeding rumen-protected methionine (RPM) in pre- and postpartum total mix ration (TMR) on lactation performance and plasma AA concentrations in dairy cows. A total of 470 multiparous Holstein cows [235 cows at University of Wisconsin (UW) and 235 cows at Cornell University (CU)] were enrolled approximately 4 wk before parturition, housed in close-up dry cow and replicated lactation pens. Pens were randomly assigned to treatment diets (pre- and postpartum, respectively): UW control (CON) diet = 2.30 and 2.09% of Met as percentage of metabolizable protein (MP) and RPM diet = 2.83 and 2.58% of Met as MP; CU CON = 2.22 and 2.19% of Met as percentage of MP, and CU RPM = 2.85 and 2.65% of Met as percentage of MP. Treatments were evaluated until 112 ± 3 d in milk (DIM). Milk yield was recorded daily. Milk samples were collected at wk 1 and 2 of lactation, and then every other week, and analyzed for milk composition. For lactation pens, dry matter intake (DMI) was recorded daily. Body weight and body condition score were determined from 4 ± 3 DIM and parturition until 39 ± 3 and 49 DIM, respectively. Plasma AA concentrations were evaluated within 3 h after feeding during the periparturient period [d -7 (±4), 0, 7 (±1), 14 (±1), and 21 (±1); n = 225]. In addition, plasma AA concentrations were evaluated (every 3 h for 24 h) after feeding in cows at 76 ± 8 DIM (n = 16) and within 3 h after feeding in cows at 80 ± 3 DIM (n = 72). The RPM treatment had no effect on DMI (27.9 vs. 28.0 kg/d) or milk yield (48.7 vs. 49.2 kg/d) for RPM and CON, respectively. Cows fed the RPM treatment had increased milk protein concentration (3.07 vs. 2.95%) and yield (1.48 vs. 1.43 kg/d), and milk fat concentration (3.87 vs. 3.77%), although milk fat yield did not differ. Plasma Met concentrations tended to be greater for cows fed RPM at 7 d before parturition (25.9 vs. 22.9 µM), did not differ at parturition (22.0 vs. 20.4 µM), and were increased on d 7 (31.0 vs. 21.2 µM) and remained greater with consistent concentrations until d 21 postpartum (d 14: 30.5 vs. 19.0 µM; d 21: 31.0 vs. 17.8 µM). However, feeding RPM decreased Leu, Val, Asn, and Ser (d 7, 14, and 21) and Tyr (d 14). At a later stage in lactation, plasma Met was increased for RPM cows (34.4 vs. 16.7 µM) consistently throughout the day, with no changes in other AA. Substantial variation was detected for plasma Met concentration (range: RPM = 8.9-63.3 µM; CON = 7.8-28.8 µM) among cows [coefficient of variation (CV) > 28%] and within cow during the day (CV: 10.5-27.1%). In conclusion, feeding RPM increased plasma Met concentration and improved lactation performance via increased milk protein production.
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Affiliation(s)
- Mateus Z Toledo
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison 53706
| | | | - Rodrigo S Gennari
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison 53706
| | - Rafael V Barletta
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison 53706
| | - Martin M Perez
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - Robert Wijma
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - Emily M Sitko
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - German Granados
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | | | | | | | - Julio O Giordano
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - Randy D Shaver
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison 53706
| | - Milo C Wiltbank
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison 53706.
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8
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Park JK, Yeo JM, Bae GS, Kim EJ, Kim CH. Effects of supplementing limiting amino acids on milk production in dairy cows consuming a corn grain and soybean meal-based diet. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2020; 62:485-494. [PMID: 32803181 PMCID: PMC7416151 DOI: 10.5187/jast.2020.62.4.485] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/31/2020] [Accepted: 06/02/2020] [Indexed: 11/25/2022]
Abstract
Limiting amino acids (AAs) for milk production in dairy cows fed on a concentrate
diet of corn grain and soybean meal was evaluated in this study. Four lactating
and multiparous Holstein cows (in third or fourth parities, with an average body
weight of 633 ± 49.2 kg), 8 to 9 weeks into their lactation period, were
used in a 4 × 4 Latin square design. The experiment comprised four
dietary treatments: (1) no intravenous infusion (control); (2) control plus
intravenous infusion of an AA mixture of 6 g/d methionine, 19.1 g/d lysine, 13.8
g/d isoleucine, and 15.4 g/d valine (4AA); (3) control plus intravenous infusion
of the AA mixture without methionine (no-Met); and (4) control plus intravenous
infusion of the AA mixture without lysine (no-Lys). All animals were fed on a
controlled diet (1 kg/d alfalfa hay, 10 kg/d silage, 14 kg/d concentrate
mixture, ad libitum timothy hay). The AA composition of the
diet and blood were determined using an automatic AA analyzer. Milk composition
(protein, fat, lactose, urea nitrogen, and somatic cell counts) was determined
using a MilkoScan. The results showed that feed intake for milk production did
not differ from that of intravenous infusion using a limiting AA mixture. The
4AA treatment numerically had the highest milk yield (32.4 kg/d), although there
was no difference when compared with the control (31.2 kg/d), no-Met (31.3
kg/d), and no-Lys (31.7 kg/d) treatments. The concentration of AAs in blood
plasma of cows in all treatments, mainly isoleucine and valine, increased
significantly compared with that of control. The no-Met treatment increased
(p < 0.05) the concentration of lysine in the blood
relative to the control and no-Lys treatments, whereas the no-Lys treatment
increased (p < 0.05) the concentration of methionine
relative to the control and no-Met treatments. In conclusion, milk production
increased when feeding 10 g/d methionine to the cows, together with their
concentrate diet of corn grain and soybean meal.
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Affiliation(s)
- Joong Kook Park
- School of Animal Life Convergence Science, Hankyong National University, Anseong 17579, Korea
| | - Joon-Mo Yeo
- Department of Dairy Science, Korean National College of Agriculture and Fisheries, Jeonju 54874, Korea
| | - Gui-Seck Bae
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea
| | - Eun Joong Kim
- Department of Animal Science, Kyungpook National University, Sangju 37224, Korea
| | - Chang-Hyun Kim
- School of Animal Life Convergence Science, Hankyong National University, Anseong 17579, Korea
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Seryl-tRNA synthetase is involved in methionine stimulation of β-casein synthesis in bovine mammary epithelial cells. Br J Nutr 2019; 123:489-498. [PMID: 31711551 PMCID: PMC7015878 DOI: 10.1017/s0007114519002885] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Despite the well-characterised mechanisms of amino acids (AA) regulation of milk protein synthesis in mammary glands (MG), the underlying specific AA regulatory machinery in bovine MG remains further elucidated. As methionine (Met) is one of the most important essential and limiting AA for dairy cows, it is crucial to expand how Met exerts its regulatory effects on dairy milk protein synthesis. Our previous work detected the potential regulatory role of seryl-tRNA synthetase (SARS) in essential AA (EAA)-stimulated bovine casein synthesis. Here, we investigated whether and how SARS participates in Met stimulation of casein production in bovine mammary epithelial cells (BMEC). With or without RNA interference against SARS, BMEC were treated with the medium in the absence (containing all other EAA and devoid of Met alone)/presence (containing 0·6 mm of Met in the medium devoid of Met alone) of Met. The protein abundance of β-casein and members of the mammalian target of rapamycin (mTOR) and general control nonderepressible 2 (GCN2) pathways was determined by immunoblot assay after 6 h treatment, the cell viability and cell cycle progression were determined by cell counting and propidium iodide-staining assay after 24 h treatment, and protein turnover was determined by l-[ring-3H5]phenylalanine isotope tracing assay after 48 h treatment. In the absence of Met, there was a general reduction in cell viability, total protein synthesis and β-casein production; in contrast, total protein degradation was enhanced. SARS knockdown strengthened these changes. Finally, SARS may work to promote Met-stimulated β-casein synthesis via affecting mTOR and GCN2 routes in BMEC.
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Fleming AJ, Lapierre H, White RR, Tran H, Kononoff PJ, Martineau R, Weiss WP, Hanigan MD. Predictions of ruminal outflow of essential amino acids in dairy cattle. J Dairy Sci 2019; 102:10947-10963. [PMID: 31704011 DOI: 10.3168/jds.2019-16301] [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: 01/14/2019] [Accepted: 05/29/2019] [Indexed: 11/19/2022]
Abstract
The objective of this work was to update and evaluate predictions of essential AA (EAA) outflows from the rumen. The model was constructed based on previously derived equations for rumen-undegradable (RUP), microbial (MiCP), and endogenous (EndCP) protein outflows from the rumen, and revised estimates of ingredient composition and EAA composition of the protein fractions. Corrections were adopted to account for incomplete recovery of EAA during 24-h acid hydrolysis. The predicted ruminal protein and EAA outflows were evaluated against a data set of observed values from the literature. Initial evaluations indicated a minor mean bias for non-ammonia, non-microbial nitrogen flow ([RUP + EndCP]/6.25) of 16 g of N per day. Root mean squared errors (RMSE) of EAA predictions ranged from 26.8 to 40.6% of observed mean values. Concordance correlation coefficients (CCC) of EAA predictions ranged from 0.34 to 0.55. Except for Leu, all ruminal EAA outflows were overpredicted by 3.0 to 32 g/d. In addition, small but significant slope biases were present for Arg [2.2% mean squared error (MSE)] and Lys (3.2% MSE). The overpredictions may suggest that the mean recovery of AA from acid hydrolysis across laboratories was less than estimates encompassed in the recovery factors. To test this hypothesis, several regression approaches were undertaken to identify potential causes of the bias. These included regressions of (1) residual errors for predicted EAA flows on each of the 3 protein-driven EA flows, (2) observed EAA flows on each protein-driven EAA flow, including an intercept, (3) observed EAA flows on the protein-driven EAA flows, excluding an intercept term, and (4) observed EAA flows on RUP and MiCP. However, these equations were deemed unsatisfactory for bias adjustment, as they generated biologically unfeasible predictions for some entities. Future work should focus on identifying the cause of the observed prediction bias.
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Affiliation(s)
- A J Fleming
- Department of Dairy Science, Virginia Tech, Blacksburg 24061
| | - H Lapierre
- Agricultural and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8
| | - R R White
- Department of Dairy Science, Virginia Tech, Blacksburg 24061; National Animal Nutrition Program, National Research Support Project, USDA, Washington, DC 20250
| | - H Tran
- National Animal Nutrition Program, National Research Support Project, USDA, Washington, DC 20250; Department of Animal Science, University of Nebraska, Lincoln 68583
| | - P J Kononoff
- Department of Animal Science, University of Nebraska, Lincoln 68583
| | - R Martineau
- Agricultural and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8
| | - W P Weiss
- Department of Animal Sciences, The Ohio State University, Columbus 43210
| | - M D Hanigan
- Department of Dairy Science, Virginia Tech, Blacksburg 24061.
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Min L, Li D, Tong X, Nan X, Ding D, Xu B, Wang G. Nutritional strategies for alleviating the detrimental effects of heat stress in dairy cows: a review. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2019; 63:1283-1302. [PMID: 31218396 DOI: 10.1007/s00484-019-01744-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 03/29/2019] [Accepted: 06/05/2019] [Indexed: 06/09/2023]
Abstract
Heat stress responses negatively impact production performance, milk quality, body temperature, and other parameters in dairy cows. As global warming continues unabated, heat stress in dairy cows is likely to become more widespread in the future. To address this challenge, researchers have evaluated a number of potentially available nutritional strategies, including dietary fat, dietary fiber, dietary microbial additives, minerals, vitamins, metal ion buffer, plant extracts, and other anti-stress additives. In this paper, we discuss the evidence for the efficacy of these nutritional strategies aimed at alleviating the detrimental effects of heat stress in dairy cows. It was comprised of the treatment (dosage and usage), animal information (lactation stage and number of dairy cows), THI value (level of heat stress), duration of exposure, the changes of feed intake and milk yield (production performance), the changes of milk protein and milk fat (milk quality), the changes of rectal temperature and respiration rate (body temperature), other indices, and reference resources. The results of these studies are presented with statistical justification in the tables. In total, the 49 kinds of dietary interventions derived from these eight types of nutritional strategies may provide an appropriate means of mitigating heat stress on a particular dairy farm based on the explanation of the results.
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Affiliation(s)
- Li Min
- State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
- Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
| | - Dagang Li
- State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
- Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
| | - Xiong Tong
- State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
- Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
| | - Xuemei Nan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, People's Republic of China
| | - Diyun Ding
- State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
- Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
| | - Bin Xu
- State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
- Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China
| | - Gang Wang
- State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China.
- Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, People's Republic of China.
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Ayyat MS, Al-Sagheer A, Noreldin AE, Abd El-Hack ME, Khafaga AF, Abdel-Latif MA, Swelum AA, Arif M, Salem AZM. Beneficial effects of rumen-protected methionine on nitrogen-use efficiency, histological parameters, productivity and reproductive performance of ruminants. Anim Biotechnol 2019; 32:51-66. [PMID: 31443628 DOI: 10.1080/10495398.2019.1653314] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Providing essential amounts of balanced nutrients is one of the most vital aspects of livestock production. Among nutrients, protein has an essential role in many physiological functions of animals. Amino acids in needs for both high and medium yielding ruminant animals are not fully covered by microbial degraded feed sources in the rumen of animals, and they must be met by protecting the proteins from being broken down in the rumen; hence, the dietary supplementation of rumen-protected proteins (RPP), including mainly rumen-protected methionine (RPM), became imperative. Many researchers are interested in studying the role of (RPM) in ruminant animals concerning its effect on milk yield, growth performance, digestibility, dry matter intake and nitrogen utilization efficiency. Unfortunately, results obtained from several investigations regarding RPM indicated great fluctuation between its useful and useless effects in ruminant nutrition particularly during early and late lactation period; therefore, this review article may be helpful for ruminant farm owners when they decide to supplement RPM in animal's diet. Conclusively, supplementation of RPM often has a balanced positive influence, without any reported negative impact on milk yield, growth performance and blood parameters especially in early lactating ruminant animals and when used with the low crude protein diet.
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Affiliation(s)
- Mohamed S Ayyat
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Adham Al-Sagheer
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Ahmed E Noreldin
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | | | - Asmaa F Khafaga
- Department of Pathology, Faculty of Veterinary Medicine, Alexandria University, Edfina, Egypt
| | - Mervat A Abdel-Latif
- Department of Nutrition and Veterinary Clinical Nutrition, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Ayman A Swelum
- Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.,Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Muhammad Arif
- Department of Animal Sciences, University College of Agriculture, University of Sargodha, Sargodha, Pakistan
| | - Abdelfattah Z M Salem
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Toluca, México
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13
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Leal Yepes FA, Mann S, Overton TR, Ryan CM, Bristol LS, Granados GE, Nydam DV, Wakshlag JJ. Effect of rumen-protected branched-chain amino acid supplementation on production- and energy-related metabolites during the first 35 days in milk in Holstein dairy cows. J Dairy Sci 2019; 102:5657-5672. [PMID: 30928273 DOI: 10.3168/jds.2018-15508] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 02/09/2019] [Indexed: 12/27/2022]
Abstract
Essential AA are critical for multiple physiological processes. Branched-chain AA (BCAA) supplementation has beneficial effects on body weight, lipogenesis, and insulin resistance in several species. The BCAA are used for milk and body protein synthesis as well as being oxidized by the tricarboxylic acid cycle to produce ATP during catabolic states. The objective was to evaluate the effect of rumen-protected BCAA (375 g of 27% l-Leu, 85 g of 48% l-Ile, and 91 g of 67% l-Val) with or without propylene glycol (PG) oral administration on milk production, dry matter intake, nonesterified fatty acids, β-hydroxybutyrate, and plasma urea nitrogen during the first 35 d in milk (DIM) in dairy cattle. Multiparous Holstein cows were enrolled in blocks of three 28 d before expected calving and assigned randomly to either the control or 1 of 2 treatments. The control (n = 26) received 200 g/d of dry molasses, the BCAA treatment (n = 23) received BCAA mixed with 200 g/d of dry molasses from calving until 35 DIM, and the BCAA plus PG (BCAAPG) treatment (n = 25) received BCAA mixed with 200 g/d of dry molasses from calving until 35 DIM plus 300 mL of PG once daily from calving until 7 DIM. Postpartum, dry matter intake least squares means (LSM; 95% confidence interval) were 20.7 (19.9, 21.7), 21.3 (20.4, 22.3), and 21.9 (20.9, 22.8) kg for control, BCAA, and BCAAPG, respectively. Milk yield (1-35 DIM) LSM were 41.7 (39.4, 44.0), 42.7 (40.3, 45.0), and 43.7 (41.4, 46.0) kg for control, BCAA, and BCAAPG, respectively. Energy-corrected milk LSM were 50.3 (46.8, 53.7), 52.4 (48.9, 55.8), and 52.9 (49.5, 56.4) kg for control, BCAA, and BCAAPG, respectively. Milk urea nitrogen LSM in milk for control, BCAA, and BCAAPG were 8.60 (8.02, 9.22), 9.70 (9.01, 10.45), and 9.75 (9.08, 10.47) mg/dL. Plasma urea nitrogen concentrations LSM for control, BCAA, and BCAAPG were 8.3 (7.7, 8.9), 10.1 (9.4, 10.9), and 9.6 (9.4, 10.3) mg/dL, respectively. The numbers of plasma samples classified as hyperketonemia were 77, 44, and 57 in control, BCAA, and BCAAPG, respectively. The BCAA supplementation increased plasma urea nitrogen and milk urea nitrogen, free valine concentration in plasma, and decreased hyperketonemia events during the postpartum period.
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Affiliation(s)
- F A Leal Yepes
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - S Mann
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
| | - T R Overton
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - C M Ryan
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - L S Bristol
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
| | - G E Granados
- Department of Animal Science, Cornell University, Ithaca, NY 14853
| | - D V Nydam
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
| | - J J Wakshlag
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
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14
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Fagundes M, Yang S, Eun JS, Hall J, Moon J, Park J. Influence of supplementing a methionine derivative, N-acetyl-l-methionine, in dairy diets on production and ruminal fermentation by lactating cows during early to mid lactation. J Dairy Sci 2018; 101:7082-7094. [DOI: 10.3168/jds.2017-14130] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 03/25/2018] [Indexed: 01/06/2023]
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15
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Feng X, White R, Tucker H, Hanigan M. Meta-analysis of 2-hydroxy-4-methylthio-butanoic acid supplementation on ruminal fermentation, milk production, and nutrient digestibility. J Dairy Sci 2018; 101:7182-7189. [DOI: 10.3168/jds.2017-13847] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 04/13/2018] [Indexed: 12/16/2022]
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16
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Toledo MZ, Baez GM, Garcia-Guerra A, Lobos NE, Guenther JN, Trevisol E, Luchini D, Shaver RD, Wiltbank MC. Effect of feeding rumen-protected methionine on productive and reproductive performance of dairy cows. PLoS One 2017; 12:e0189117. [PMID: 29261700 PMCID: PMC5738048 DOI: 10.1371/journal.pone.0189117] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 11/20/2017] [Indexed: 01/29/2023] Open
Abstract
The objectives of this study were to evaluate the effects of daily top-dressing (individually feeding on the top of the total mixed ration) with rumen-protected methionine (RPM) from 30 ± 3 until 126 ± 3 Days in milk on productive and reproductive performance in lactating dairy cows. A total of 309 lactating dairy Holstein cows (138 primiparous and 171 multiparous) were randomly assigned to treatment diets containing either RPM (21.2 g of RPM + 38.8 g of dried distillers grain; 2.34% Methionine [Met] of metabolizable protein [MP]) or Control (CON; 60 g of dried distillers grain; 1.87% Met of MP). Plasma amino acids were evaluated at the time of artificial insemination (AI) and near pregnancy diagnosis. Milk production and milk composition were evaluated monthly. Pregnancy was diagnosed on Day 28 (by Pregnancy-specific protein B [PSPB]), 32, 47, and 61 (by ultrasound) and sizes of embryonic and amniotic vesicle were determined by ultrasound on Day 33 after AI. Feeding RPM increased plasma Met at 6, 9, 12, and 18 hours after top-dressing with a peak at 12 hours (52.4 vs 26.0 μM; P < 0.001) and returned to basal by 24 hours. Cows fed RPM had a small increase in milk protein percentage (3.08 vs 3.00%; P = 0.04) with no differences on milk yield and milk protein yield. Additionally, in multiparous cows, RPM feeding increased milk protein (3.03 vs 2.95%; P = 0.05) and fat (3.45 vs 3.14%; P = 0.01) percentages, although no effects were observed in primiparous cows. In multiparous cows fed RPM, pregnancy loss was lower between Days 28 to 61 (19.6 [10/51] vs. 6.1% [3/49]; P = 0.03) or between Days 32 to 61 (8.9 [4/45] vs. 0 [0/0] %; P = 0.03), although, there was no effect of treatment on pregnancy loss in primiparous cows. Consistent with data on pregnancy loss, RPM feeding increased embryonic abdominal diameter (P = 0.01) and volume (P = 0.009) and amniotic vesicle volume (P = 0.04) on Day 33 of pregnancy in multiparous cows but had no effect on embryonic size in primiparous cows. Thus, the increase in plasma Met concentrations after feeding RPM was sufficient to produce a small increase in milk protein percentage and to improve embryonic size and pregnancy maintenance in multiparous cows. Further studies are needed to confirm these responses and understand the biological mechanisms that underlie these responses as well as the timing and concentrations of circulating Met that are needed to produce this effect.
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Affiliation(s)
- Mateus Z. Toledo
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Giovanni M. Baez
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Alvaro Garcia-Guerra
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
- Endocrinology and Reproductive Physiology Program, University of Wisconsin-Madison, Madison, WI, United States of America
| | - Nelson E. Lobos
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Jerry N. Guenther
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Eduardo Trevisol
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Daniel Luchini
- Adisseo USA Inc., Alpharetta, Georgia, Unites States of America
| | - Randy D. Shaver
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Milo C. Wiltbank
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
- Endocrinology and Reproductive Physiology Program, University of Wisconsin-Madison, Madison, WI, United States of America
- * E-mail:
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17
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Dong X, Zhou Z, Saremi B, Helmbrecht A, Wang Z, Loor JJ. Varying the ratio of Lys:Met while maintaining the ratios of Thr:Phe, Lys:Thr, Lys:His, and Lys:Val alters mammary cellular metabolites, mammalian target of rapamycin signaling, and gene transcription. J Dairy Sci 2017; 101:1708-1718. [PMID: 29248224 DOI: 10.3168/jds.2017-13351] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 10/26/2017] [Indexed: 12/14/2022]
Abstract
Amino acids are not only precursors for but also signaling molecules regulating protein synthesis. Regulation of protein synthesis via AA occurs at least in part by alterations in the phosphorylation status of mammalian target of rapamycin (mTOR) pathway proteins. Although the ideal profile of Lys:Met to promote milk protein synthesis during established lactation in dairy cows has been proposed to be 3:1, aside from being the most-limiting AA for milk protein synthesis, the role of Met in other key biologic pathways such as methylation is not well characterized in the bovine. The objective of this study was to determine the influence of increasing supplemental Met, based on the ideal 3:1 ratio of Lys to Met, on intracellular metabolism related to protein synthesis and mTOR pathway phosphorylation status. MAC-T cells, an immortalized bovine mammary epithelial cell line, were incubated (n = 5 replicates/treatment) for 12 h with 3 incremental doses of Met while holding Lys concentration constant to achieve the following: Lys:Met 2.9:1 (ideal AA ratio; IPAA), Lys:Met 2.5:1 (LM2.5), and Lys:Met 2.0:1 (LM2.0). The ratios of Thr:Phe (1.05:1), Lys:Thr (1.8:1), Lys:His (2.38:1), and Lys:Val (1.23:1) were the same across the 3 treatments. Applying gas chromatography-mass spectrometry metabolomics revealed distinct clusters of differentially concentrated metabolites in response to Lys:Met. Lower Phe, branched-chain AA, and putrescine concentrations were observed with LM2.5 compared with IPAA. Apart from greater intracellular Met concentrations, further elevations in Met level (LM2.0) led to greater intracellular concentrations of nonessential AA (Pro, Glu, Gln, and Gly) compared with IPAA and greater essential AA (EAA; Met, Ile, and Leu) and nonessential AA (Pro, Gly, Ala, Gln, and Glu) compared with LM2.5. However, compared with IPAA, mRNA expression of β-casein and AA transporters (SLC7A5, SLC36A1, SLC38A2, SLC38A9, and SLC43A1) and mTOR phosphorylation were lower in response to LM2.5 and LM2.0. Overall, the results of this study provide evidence that increasing Met while Lys and the ratios of Phe, Thr, His, and Val relative to Lys were held constant could increase the concentration and utilization of intracellular EAA, in particular branched-chain AA, potentially through improving the activity of AA transporters partly controlled by mTOR signaling. Because EAA likely are metabolized by other tissues upon absorption, a question for future in vivo studies is whether formulating diets for optimal ratios of EAA in the metabolizable protein is sufficient to provide the desired levels of these AA to the mammary cells.
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Affiliation(s)
- X Dong
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Animal Nutrition Institute of Sichuan Agricultural University, Ya'an, 625014, Sichuan Province, P.R. China; Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801
| | - Z Zhou
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801; Department of Animal and Veterinary Sciences, Clemson University, Clemson, SC 29634
| | - B Saremi
- Evonik Nutrition and Care GmbH, 63457 Hanau-Wolfgang, Germany
| | - A Helmbrecht
- Evonik Nutrition and Care GmbH, 63457 Hanau-Wolfgang, Germany
| | - Z Wang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Animal Nutrition Institute of Sichuan Agricultural University, Ya'an, 625014, Sichuan Province, P.R. China.
| | - J J Loor
- Mammalian NutriPhysioGenomics, Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana 61801.
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18
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Titi HH. Effect of long-term rumen-protected methionine supplementation on performance of Shami goats and growth performance of their kids. ANIMAL PRODUCTION SCIENCE 2017. [DOI: 10.1071/an14862] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An experiment was conducted to study the effect of supplementing the diets of Shami goats with rumen-protected methionine (RPM) in late pregnancy (last 60 days) and early lactation on milk production, composition, fatty acid profile in the first 60 days of lactation, and on growth performance of their kids. Three groups were used (25 goats/group) in a completely randomised design. Groups were a control with no supplements (0RPM) or supplemented with either 2.5 (2.5RPM), or 5.0 g/head.day RPM (5RPM). Birth and weaning weights for kids were recorded and analysed. Milk production was measured and sampled biweekly from each dam and analysed for milk composition. Results showed that RPM had no effect on birth and weaning weights, or average daily gain of Shami kids. However, milk to gain ratio of kids was significantly (P < 0.05) improved. Milk production increased significantly (P < 0.05) in 5RPM group compared with 0RPM and 2.5RPM groups. Milk protein content was the highest (P < 0.05) in the 2.5RPM group, followed by the 5RPM and 0RPM groups, whereas milk fat content was not different among the groups. Meanwhile, yields of both components were significantly (P < 0.05) higher in milk of treated groups. Casein and energy-corrected milk were increased (P < 0.05) with treatment. No effect on dry-matter intake was recorded, while feed to milk ratio was better (P < 0.05) for RPM groups than for 0RPM group. Milk fatty acids composition did not show significant changes after RPM treatment. In conclusion, results showed that supplementing RPM to Shami goats in late pregnancy did not affect birthweight or growth of suckling kids but improved milk production and milk protein, although no clear dose response to RPM was detected.
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Baghbanzadeh-Nobari B, Taghizadeh A, Khorvash M, Parnian-Khajehdizaj F, Maloney SK, Hashemzadeh-Cigari F, Ghaffari AH. Digestibility, ruminal fermentation, blood metabolites and antioxidant status in ewes supplemented with DL-methionine or hydroxy-4 (methylthio) butanoic acid isopropyl ester. J Anim Physiol Anim Nutr (Berl) 2016; 101:e266-e277. [DOI: 10.1111/jpn.12600] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 08/17/2016] [Indexed: 01/06/2023]
Affiliation(s)
| | - A. Taghizadeh
- Department of Animal Science; Faculty of Agriculture; University of Tabriz; Tabriz Iran
| | - M. Khorvash
- Department of Animal Science; College of Agriculture; Isfahan University of Technology; Isfahan Iran
| | | | - S. K. Maloney
- Faculty of Life and Physical Sciences; School of Anatomy, Physiology and Human Biology (M311); University of Western Australia; Crawley WA Australia
| | - F. Hashemzadeh-Cigari
- Department of Animal Science; Faculty of Agriculture Science; University of Guilan; Rasht Iran
| | - A. H. Ghaffari
- Department of Animal Science; College of Agriculture; Ferdowsi University of Mashhad; Mashhad Iran
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20
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Zhang Q, Bertics SJ, Luchini N, White HM. The effect of increasing concentrations of dl-methionine and 2-hydroxy-4-(methylthio) butanoic acid on hepatic genes controlling methionine regeneration and gluconeogenesis. J Dairy Sci 2016; 99:8451-8460. [DOI: 10.3168/jds.2016-11312] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 06/16/2016] [Indexed: 12/21/2022]
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21
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Liu G, Ma Z, Shan A, Wang L, Bi Z. Effects of dietary rumen-protected lysine on milk yield and composition in lactating cows fed diets containing double-low rapeseed meal. INT J DAIRY TECHNOL 2016. [DOI: 10.1111/1471-0307.12270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gang Liu
- Institute of Animal Nutrition; Northeast Agricultural University; No. 59 Mucai Street Xiangfang District Harbin 150030 China
| | - Zhi Ma
- Institute of Animal Nutrition; Northeast Agricultural University; No. 59 Mucai Street Xiangfang District Harbin 150030 China
| | - Anshan Shan
- Institute of Animal Nutrition; Northeast Agricultural University; No. 59 Mucai Street Xiangfang District Harbin 150030 China
| | - Lin Wang
- Institute of Animal Nutrition; Northeast Agricultural University; No. 59 Mucai Street Xiangfang District Harbin 150030 China
| | - Zhongpeng Bi
- Institute of Animal Nutrition; Northeast Agricultural University; No. 59 Mucai Street Xiangfang District Harbin 150030 China
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22
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Han Z, Yang B, Yang Z, Xi Y. Effects of 2-hydroxy-4-(methylthio) butanoic acid isopropyl ester on growth and blood components in growing Holstein steers. Anim Sci J 2016; 88:286-293. [DOI: 10.1111/asj.12648] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Revised: 03/08/2016] [Accepted: 03/15/2016] [Indexed: 01/14/2023]
Affiliation(s)
- Zhaoyu Han
- College of Animal Science and Technology; Nanjing Agricultural University; Nanjing Jiangsu China
| | - Baokui Yang
- College of Animal Science and Technology; Nanjing Agricultural University; Nanjing Jiangsu China
| | - Zhen Yang
- College of Animal Science and Technology; Nanjing Agricultural University; Nanjing Jiangsu China
| | - Yumeng Xi
- College of Animal Science and Technology; Nanjing Agricultural University; Nanjing Jiangsu China
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23
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Giallongo F, Hristov AN, Oh J, Frederick T, Weeks H, Werner J, Lapierre H, Patton RA, Gehman A, Parys C. Effects of slow-release urea and rumen-protected methionine and histidine on performance of dairy cows. J Dairy Sci 2015; 98:3292-308. [PMID: 25726096 DOI: 10.3168/jds.2014-8791] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 01/10/2015] [Indexed: 11/19/2022]
Abstract
This experiment was conducted with the objective to investigate the effects of slow-release urea and rumen-protected (RP) Met and His supplementation of a metabolizable protein (MP)-deficient diet (according to NRC, 2001) on lactation performance of dairy cows. Sixty lactating Holstein cows were used in a 10-wk randomized complete block-design trial. Cows were fed a covariate diet for 2 wk and then assigned to one of the following treatments for an 8-wk experimental period: (1) MP-adequate diet [AMP; 107% of MP requirements, based on the National Research Council (NRC, 2001)]; (2) MP-deficient diet (DMP; 95% of MP requirements); (3) DMP supplemented with slow-release urea (DMPU); (4) DMPU supplemented with RPMet (DMPUM); and (5) DMPUM supplemented with RPHis (DMPUMH). Total-tract apparent digestibility of dry matter, organic matter, neutral detergent fiber, and crude protein, and urinary N and urea-N excretions were decreased by DMP, compared with AMP. Addition of slow-release urea to the DMP diet increased urinary urea-N excretion. Dry matter intake (DMI) and milk yield (on average 44.0±0.9kg/d) were not affected by treatments, except DMPUMH increased DMI and numerically increased milk yield, compared with DMPUM. Milk true protein concentration and yield were increased and milk fat concentration tended to be decreased by DMPUMH, compared with DMPUM. Cows gained less body weight on the DMP diet, compared with AMP. Plasma concentrations of His and Lys were not affected by treatments, whereas supplementation of RPMet increased plasma Met concentration. Plasma concentration of 3-methylhistidine was or tended to be higher for DMP compared with AMP and DMPU, respectively. Addition of RPHis to the DMPUM diet tended to increase plasma glucose and creatinine. In conclusion, feeding a 5% MP-deficient diet (according to NRC, 2001) did not decrease DMI and yields of milk and milk components, despite a reduction in nutrient digestibility. Supplementation of RPHis increased DMI and milk protein concentration and yield. These results are in line with our previous data and suggest that His may have a positive effect on voluntary feed intake and milk production and composition in high-yielding dairy cows fed MP-deficient diets.
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Affiliation(s)
- F Giallongo
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - A N Hristov
- Department of Animal Science, The Pennsylvania State University, University Park 16802.
| | - J Oh
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - T Frederick
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - H Weeks
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - J Werner
- Animal Resource Program, The Pennsylvania State University, University Park 16802
| | - H Lapierre
- Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8
| | - R A Patton
- Nittany Dairy Nutrition Inc., Mifflinburg, PA 17844
| | - A Gehman
- Alltech Inc., Nicholasville, KY, 40356
| | - C Parys
- Evonik Industries AG, 63457 Hanau, Germany
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Lee C, Oh J, Hristov A, Harvatine K, Vazquez-Anon M, Zanton G. Effect of 2-hydroxy-4-methylthio-butanoic acid on ruminal fermentation, bacterial distribution, digestibility, and performance of lactating dairy cows. J Dairy Sci 2015; 98:1234-47. [DOI: 10.3168/jds.2014-8904] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Accepted: 10/26/2014] [Indexed: 12/15/2022]
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Zanton G, Bowman G, Vázquez-Añón M, Rode L. Meta-analysis of lactation performance in dairy cows receiving supplemental dietary methionine sources or postruminal infusion of methionine. J Dairy Sci 2014; 97:7085-101. [DOI: 10.3168/jds.2014-8220] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 08/07/2014] [Indexed: 11/19/2022]
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Křížová L, Třináctý J, Svobodová J, Richter M, Černý V, Jarošová A. Effect of supplemental rumen-protected lysine, methionine or both added to diet of lactating dairy cows on milk fatty acids profile. ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS 2014. [DOI: 10.11118/actaun201058010087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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27
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Lactation performance and mammary amino acid metabolism in lactating dairy goats when complete or met lacking amino acid mixtures were infused into the jugular vein. Small Rumin Res 2014. [DOI: 10.1016/j.smallrumres.2014.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Osorio JS, Ji P, Drackley JK, Luchini D, Loor JJ. Supplemental Smartamine M or MetaSmart during the transition period benefits postpartal cow performance and blood neutrophil function. J Dairy Sci 2013; 96:6248-63. [PMID: 23910549 DOI: 10.3168/jds.2012-5790] [Citation(s) in RCA: 143] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 06/10/2013] [Indexed: 12/20/2022]
Abstract
The onset of lactation in dairy cows is characterized by severe negative energy and protein balance. Methionine availability during this time for milk production, hepatic lipid metabolism, and immune function may be limiting. Supplementing Met to peripartal diets with adequate Lys in metabolizable protein (MP) to fine-tune the Lys:Met ratio may be beneficial. Fifty-six multiparous Holstein cows were fed the same basal diet from 50 d before expected calving to 30 d in milk. From -50 to -21 d before expected calving, all cows received the same diet [1.24 Mcal/kg of dry matter (DM), 10.3% rumen-degradable protein, and 4% rumen-undegradable protein] with no Met supplementation. From -21 d to expected calving, the cows received diets (1.54 Mcal/kg of DM, 10% rumen-degradable protein, and 5.1% rumen-undegradable protein) with no added Met (control, CON; n=14), CON plus MetaSmart (MS; Adisseo Inc., Antony, France; n=12), or CON plus Smartamine M (SM; Adisseo Inc.; n=12). From calving through 30 d in milk, the cows received the same postpartum diet (1.75 Mcal/kg of DM and 17.5% CP; CON), or the CON plus MS or CON plus SM. The Met supplements were adjusted daily and top-dressed over the total mixed ration at a rate of 0.19 or 0.07% (DM) of feed for MS or SM. Liver tissue was collected on -10, 7, and 21 d, and blood samples more frequently, from -21 through 21 d. Data were analyzed using the MIXED procedure of SAS (SAS Institute Inc., Cary, NC) with the preplanned contrasts CON versus SM + MS and SM versus MS. No differences in prepartal DM intake (DMI) or body condition score were observed. After calving, body condition score was lower (2.6 vs. 2.8), whereas DMI was greater (15.4 vs. 13.3 kg/d) for Met-supplemented cows. Postpartal diet × time interactions were observed for milk fat percentage, milk fat yield, energy-corrected milk:DMI ratio, and energy balance. These were mainly due to changes among time points across all treatments. Cows supplemented with either Met source increased milk yield, milk protein percentage, energy-corrected milk, and milk fat yield by 3.4 kg/d, 0.18% units, 3.9 kg/d, and 0.18 kg/d, respectively. Those responses were associated with greater postpartum concentration of growth hormone but not insulin-like growth factor 1. There was a diet × time effect for nonesterified fatty acid concentration due to greater values on d 7 for MS; however, liver concentration of triacylglycerol was not affected by diet or diet × time but increased postpartum. Blood neutrophil phagocytosis at 21 d was greater with Met supplementation, suggesting better immune function. Supplemental MS or SM resulted in a tendency for lower incidence of ketosis postpartum. Although supplemental MS or SM did not decrease liver triacylglycerol, it improved milk production-related traits by enhancing voluntary DMI.
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Affiliation(s)
- J S Osorio
- Mammalian NutriPhysioGenomics, and University of Illinois, 1207 West Gregory Drive, Urbana 61801; Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, 1207 West Gregory Drive, Urbana 61801
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Liu YG, Peng HH, Schwab CG. Enhancing the productivity of dairy cows using amino acids. ANIMAL PRODUCTION SCIENCE 2013. [DOI: 10.1071/an13203] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Since the revision of the National Research Council’s Nutrient Requirements of Dairy Cattle in 2001, significant progress has been made in balancing the amino acid composition of dairy cow diets. In formulating such diets, it is important not only to satisfy requirements for rumen degradable protein and rumen undegradable protein, but also to ensure a balanced ratio between the first two limiting amino acids, lysine and methionine, as well as with other amino acids. A lysine to methionine ratio of 3 : 1 in metabolisable protein (when using the NRC model) increases the cost-efficiency of diets and milk yield, and renders milk production more predictable. Moreover, balancing amino acids gives the opportunity to formulate diets with less rumen-undegradable protein, improves the cow’s health and reproductive performance, and decreases nitrogen excretion.
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Whelan S, Pierce K, Flynn B, Mulligan F. Effect of supplemental concentrate type on milk production and metabolic status in early-lactation dairy cows grazing perennial ryegrass-based pasture. J Dairy Sci 2012; 95:4541-9. [DOI: 10.3168/jds.2011-5292] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 04/13/2012] [Indexed: 01/27/2023]
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Xia K, Xi WB, Wang ZB, Wang Y, Zhang YG. Effects of feeding methylthio butyric Acid isopropyl ester on postpartum performance and metabolism in dairy cows. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2012; 25:659-64. [PMID: 25049611 PMCID: PMC4093103 DOI: 10.5713/ajas.2011.11405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Revised: 01/17/2012] [Accepted: 12/28/2011] [Indexed: 11/27/2022]
Abstract
The present experiment aimed to evaluate the effect of HMBi on the production performance and metabolism in dairy cows. Thirty multiparous Holstein dairy cows under similar conditions were randomly assigned to three dietary treatments; i) Control, a basal diet; ii) T1, a basal diet plus HMBi (0 g prepartum and 18 g postpartum); and iii) T2, a basal diet plus HMBi (10 g prepartum and 18 g postpartum). Treatments were initiated 21 d before expected calving and continued through 91 d postpartum. HMBi was top-dressed onto the total mixed ration of each cow. Treatments did not affect dry matter intake, plasma urea nitrogen, peak milk yield, days to peak milk yield, nonesterified fatty acid, glutamate pyruvate transaminase, glutamic oxalaetic transaminase, milk fat content, milk protein content, milk lactose content, and milk solid non-fat content. The milk composition yields were increased by the HMBi-supplemented treatment. The T1 and T2 treatments increased the yields of 4% fat-corrected milk yield, milk fat, milk protein, and milk lactose compared with the control. Although there was no difference in the milk composition of the control and T2-treated cows, the T2-treated cows exhibited higher milk fat yield (increased by 74 g/d), lower milk urea nitrogen (reduced by 3.41%), and plasma β-hydroxy butyrate than the control cows. The results indicate that HMBi supplementation to diet has beneficial effects, and that there is no difference between supplementation at prepartum and starting only at parturition.
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Affiliation(s)
- K Xia
- College of Animal Husbandry and Veterinary, Shenyang Agriculture University, Shenyang, 110866, China
| | - W B Xi
- College of Animal Husbandry and Veterinary, Shenyang Agriculture University, Shenyang, 110866, China
| | - Z B Wang
- College of Animal Husbandry and Veterinary, Shenyang Agriculture University, Shenyang, 110866, China
| | - Y Wang
- College of Animal Husbandry and Veterinary, Shenyang Agriculture University, Shenyang, 110866, China
| | - Y G Zhang
- College of Animal Husbandry and Veterinary, Shenyang Agriculture University, Shenyang, 110866, China
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Scientific Opinion on DL‐methionine, DL‐methionine sodium salt, the hydroxy analogue of methionine and the calcium salt of methionine hydroxy analogue in all animal species; on the isopropyl ester of methionine hydroxy analogue and DL‐methionine technically pure protected with copolymer vinylpyridine/styrene in dairy cows; and on DL‐methionine technically pure protected with ethylcellulose in ruminants. EFSA J 2012. [DOI: 10.2903/j.efsa.2012.2623] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Dalbach K, Larsen M, Raun B, Kristensen N. Effects of supplementation with 2-hydroxy-4-(methylthio)-butanoic acid isopropyl ester on splanchnic amino acid metabolism and essential amino acid mobilization in postpartum transition Holstein cows. J Dairy Sci 2011; 94:3913-27. [DOI: 10.3168/jds.2010-3724] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Accepted: 04/06/2011] [Indexed: 11/19/2022]
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Wang C, Liu HY, Wang YM, Yang ZQ, Liu JX, Wu YM, Yan T, Ye HW. Effects of dietary supplementation of methionine and lysine on milk production and nitrogen utilization in dairy cows. J Dairy Sci 2010; 93:3661-70. [PMID: 20655436 DOI: 10.3168/jds.2009-2750] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 05/06/2010] [Indexed: 11/19/2022]
Abstract
The effect of the content of lysine and methionine in metabolizable protein (MP) on lactation performance and N utilization in Chinese Holstein cows was determined. A control diet (C) was formulated to be adequate in energy but slightly limiting in MP. The concentration of Met and Lys in MP was 1.87 and 5.93%, respectively. The treatments were as follows (% of Met or Lys in MP): L=diet C supplemented with L-lysine-HCl at 0.49% on a dry matter (DM) basis (Met, 1.87; Lys, 7.00); M=diet C supplemented with 2-hydroxy-4-(methylthio)-butanoic acid (HMB) at 0.15% (Met, 2.35; Lys, 5.93); ML=diet C supplemented with 0.49% L-lysine HCl and 0.15% HMB (Met, 2.39; Lys, 7.10). The diets were fed to 60 Chinese Holsteins in mid-lactation (average days in milk=120, and milk yield=32.0 kg/d) for 8 wk. Milk yield was increased by supplementation of either Lys (1.5 kg/d) or Met (2.0 kg/d), and supplementation of both Lys and Met further increased milk yield (3.8 kg/d). There was no significant difference in dry matter intake across treatment groups. Cows on treatments M (3.95%) and ML (3.90%) had higher milk fat content than those on C (3.60%) and L (3.67%), but there were no significant differences in milk protein and lactose contents or somatic cell count among treatments. Supplementation of Met or Lys significantly increased Met or Lys concentration in arterial plasma. Treatment ML had a higher conversion of intake N to milk N and lower urea N concentrations in serum, urine, and milk than did treatment C. Supplementing HMB and L-lysine-HCl to provide approximately 2.3% Met and 7.0% Lys of the MP in diets slightly limiting in MP increased milk production, milk protein yield, and N utilization efficiency.
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Affiliation(s)
- C Wang
- Institute of Dairy Science, Zhejiang University, Hangzhou 310029, PR China
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Patton R. Effect of rumen-protected methionine on feed intake, milk production, true milk protein concentration, and true milk protein yield, and the factors that influence these effects: A meta-analysis. J Dairy Sci 2010; 93:2105-18. [DOI: 10.3168/jds.2009-2693] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Accepted: 01/21/2010] [Indexed: 01/23/2023]
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Ordway R, Boucher S, Whitehouse N, Schwab C, Sloan B. Effects of providing two forms of supplemental methionine to periparturient Holstein dairy cows on feed intake and lactational performance. J Dairy Sci 2009; 92:5154-66. [DOI: 10.3168/jds.2009-2259] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Weiss W, St-Pierre N. A method to quantify changes in supply of metabolizable methionine to dairy cows using concentrations of selenium in milk. J Dairy Sci 2009; 92:2835-42. [DOI: 10.3168/jds.2008-1882] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Cho J, Overton TR, Schwab CG, Tauer LW. Determining the Amount of Rumen-Protected Methionine Supplement That Corresponds to the Optimal Levels of Methionine in Metabolizable Protein for Maximizing Milk Protein Production and Profit on Dairy Farms. J Dairy Sci 2007; 90:4908-16. [PMID: 17881714 DOI: 10.3168/jds.2007-0314] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The profitability of feeding rumen-protected Met (RPMet) sources to produce milk protein was estimated using a 2-step procedure: First, the effect of Met in metabolizable protein (MP) on milk protein production was estimated by using a quadratic Box-Cox functional form. Then, using these estimation results, the amounts of RPMet supplement that corresponded to the optimal levels of Met in MP for maximizing milk protein production and profit on dairy farms were determined. The data used in this study were modified from data used to determine the optimal level of Met in MP for lactating cows in the Nutrient Requirements of Dairy Cattle (NRC, 2001). The data used in this study differ from that in the NRC (2001) data in 2 ways. First, because dairy feed generally contains 1.80 to 1.90% Met in MP, this study adjusts the reference production value (RPV) from 2.06 to 1.80 or 1.90%. Consequently, the milk protein production response is also modified to an RPV of 1.80 or 1.90% Met in MP. Second, because this study is especially interested in how much additional Met, beyond the 1.80 or 1.90% already contained in the basal diet, is required to maximize farm profits, the data used are limited to concentrations of Met in MP above 1.80 or 1.90%. This allowed us to calculate any additional cost to farmers based solely on the price of an RPMet supplement and eliminated the need to estimate the dollar value of each gram of Met already contained in the basal diet. Results indicated that the optimal level of Met in MP for maximizing milk protein production was 2.40 and 2.42%, where the RPV was 1.80 and 1.90%, respectively. These optimal levels were almost identical to the recommended level of Met in MP of 2.40% in the NRC (2001). The amounts of RPMet required to increase the percentage of Met in MP from each RPV to 2.40 and 2.42% were 21.6 and 18.5 g/d, respectively. On the other hand, the optimal levels of Met in MP for maximizing profit were 2.32 and 2.34%, respectively. The amounts of RPMet required to increase the percentage of Met in MP from each RPV to 2.32 and 2.34% were 18.7 and 15.6 g/d, respectively. In each case, the additional daily profit per cow was estimated to be $0.38 and $0.29. These additional profit estimates were $0.02 higher than the additional profit estimates for maximizing milk protein production.
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Affiliation(s)
- J Cho
- Department of Applied Economics and Management, Cornell University, Ithaca, NY 14853, USA
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