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Nano-chromium picolinate and heat stress enhance insulin sensitivity in cross-bred sheep

Animal Nutrition 2023年第2期13卷 173-184页

作者： Alex T.Hung Brian J.Leury Matthew A.Sabin Fahri Fahri Kristy DiGiacomo Tu-Fa Lien frank r.dunshea Faculty of Veterinary and Agricultural Sciences The University of MelbourneParkvilleVIC 3010Australia Murdoch Children's research Institute The University of MelbourneParkvilleVIC 3010Australia Department of Animal Science National Chiayi UniversityChiayiChina Faculty of Biological Sciences The University of LeedsLeeds LS29JTUnited Kingdom

This study evaluated the effects of heat stress(HS)and dietary nano chromium picolinate(nCrPic)on metabolic responses of sheep to an intravenous glucose tolerance test(IVGTT),an intravenous insulin tolerance test(ITT)and an intramuscular adrenocorticotropin hormone(ACTH)challenge in ***-six sheep housed in metabolic cages were randomly allocated within 3 dietary groups(0,400 and 800 mg/kg supplemental nCrPic)to either thermoneutral(22℃)or cyclic HS(22 to 40℃)conditions for 3 *** plasma glucose tended to be increased during HS(P=0.052)and decreased by dietary nCrPic(P=0.013)while plasma non-esterified fatty acid concentrations were decreased(P=0.010)by ***-etary nCrPic reduced the plasma glucose area under the curve(P=0.012)while there were no significant effects of HS on plasma glucose area under the curve in response to the *** plasma insulin response over the first 60 min after the IVGTT was decreased by HS(P=0.013)and dietary nCrPic(P=0.022)with the effects being *** response to the ITT plasma glucose reached a nadir sooner(P=0.005)in sheep exposed to HS,although there was no effect on the depth of the *** nCrPic decreased(P=0.007)the plasma glucose nadir after *** the duration of the ITT plasma insulin concentrations were lower in sheep exposed to HS(P=0.013)whereas there was no significant effect of supplemental *** was no effect of either HS or nCrPic on cortisol response to *** nCrPic supple-mentation decreased(P=0.013)mitogen-activated protein kinase-8(JNK)and increased(P=0.050)carnitine palmitoyltransferase 1B(CPT1B)mrNA expression in skeletal *** of this experiment demonstrated that animals under HS and supplemented with nCrPic had greater insulin sensitivity.

关键词： Chromium picolinate Sheep Heat stress Insulin sensitivity

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Effect of processing on bioaccessibility and bioavailability of bioactive compounds in coffee beans

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Food Bioscience 2022年第2期46卷 1-13页

作者： Hanjing Wu Jingyu Gu Amrit BK Malik A.Nawaz Colin J.Barrow frank r.dunshea Hafiz A.r.Suleria School of Agriculture and Food Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkville3010VICAustralia Commonwealth Scientific and Industrial research Organisation(CSIrO) Agriculture and Food671 Sneydes RoadPrivate Bag 16WerribeeVictoria3030Australia Centre for Chemistry and Biotechnology School of Life and Environmental SciencesDeakin UniversityWaurn PondsVIC3217Australia Faculty of Biological Sciences The University of LeedsLeedsLS29JTUK

Coffee is one of the most prevalent and functional beverages around world owing to its rich content of bioactive *** compounds and alkaloids are two primary groups of bioactive compounds in coffee beans,which have been proven healthy benefits in regular and suitable daily *** have been recognized as protective factors,especially phenolic compounds,to perform high antioxidant capacities and potential to relieve the occurrence of chronic diseases and partial *** content and composition of bioactive and anti-nutritional compounds in coffee beans can be mainly influenced by variety,processing and storage *** cultivar of Arabica coffee beans(***)exhibits lower content of phenolic compounds but similar anti-nutritional substances with the comparison to robusta(***).Comparing to green coffee beans,reasonable roasting contributes to the improvement of phenolic content and its total antioxidant activity because of the liberation of bound phenolic compounds and the generation of novel compounds with antioxidant *** intensive roasting will not only decrease the number of bioactive compounds within the coffee beans but also stimulate the generation of endogenous anti-nutritional compounds,which consequently reduce the coffee nutritional *** fluctuations of moisture content during storage would be the primary reason of the changes in the content of bioactive *** compounds in coffee beans perform outstanding bioaccessibility but relatively lower absorption efficiency because of the combination with other *** roasting would improve the bioavailability of bioactive *** interaction between phenolic compounds and proteins would also influence the bioavailability and bioactivity of bioactive compounds and final nutritional value after consumption.

关键词： Coffee beans Phenolic compounds Alkaloids Anti-nutritional compounds roasting Bioavailability

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Screening of phenolic compounds in australian grown grapes and their potential antioxidant activities

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Food Bioscience 2022年第3期47卷 544-556页

作者： Gia Toan Vo Ziyao Liu Osbert Chou Biming Zhong Colin J.Barrow frank r.dunshea Hafiz A.r.Suleria School of Agriculture and Food Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVIC3010Australia CAS Key Laboratory of Quantitative Engineering Biology Synthetic Biochemistry CenterShenzhen Institute of Synthetic BiologyShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China Centre for Chemistry and Biotechnology School of Life and Environmental SciencesDeakin UniversityWaurn PondsVIC3217Australia Faculty of Biological Sciences The University of LeedsLeedsLS2 9JTUK

Grapes(Vitis Vinifera)are one of the world's most utilised and prized *** are a great source of antioxidants due to the abundance of phenolic *** pulp is the main part of the grape being *** pulp of five Australian grown grapes–Dawn Seedless(DS),Calmeria(CG),Golden Globe(GG),Menindee Seedless(MS),and Thompson Seedless(TS)will be qualitatively and quantitatively analysed for its phenolic composition and antioxidant *** general trend followed:GG>TS>MS>DS>CG,and the phenolic content of the pulp also presented a significant positive correlation with the antioxidant *** revealing the highest levels of TPC(4.31±0.11 mg GAE/g)and TFC(0.48±0.09 mg QE/g)while TS were highest in TTC(0.94±0.12 mg CE/g).Similarly,GG exhibited higher antioxidant capacity in DPPH(5.84±0.17 mg AAE/g),FrAP(4.91±0.14 mg AAE/g),and TAC(6.78±0.12 mg AAE/g),while TS revealed highest radical scavenging ability for ABTS(4.56±0.19 mg AAE/g).The LC-ESI-QTOF-MS/MS tentatively identified 78 phenolic compounds consisting of flavonoids(36),phenolic acids(31),lignans(3),stilbenes(1),and other polyphenols(7)in five grapes *** most abundant fruit-based targeted polyphenols were *** had a higher phenolic concentration in HPLC-PDA quantification,particularly for phenolic acids(gallic acid and chlorogenic acid)and flavonoids(kaempferol).Our study provides relatively adequate information on grape pulp's phenolic content and antioxidant capacity,providing confidence and research prospects to promote grape pulp use in different food,pharmaceutical and supplement industries,and even influencing grape cultivation.

关键词： Australian grown grapes Phenolic compounds LC-ESI-QTOF-MS/MS Antioxidant activity HPLC-PDA

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Gestational heat stress alters skeletal muscle gene expression profiles and vascularity in fetal pigs in a sexually dimorphic manner

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Journal of Animal Science and Biotechnology 2022年第6期13卷 1785-1798页

作者： Weicheng Zhao Mark P.Green Christina D.Marth Fan Liu Hieu H.Le Gordon S.Lynch Alan W.Bell Brian J.Leury frank r.dunshea Jeremy J.Cottrell School of Agriculture and Food Faculty of Veterinary and Agricultural SciencesThe University of MelbourneParkvilleVIC 3010Australia School of BioSciences Faculty of ScienceThe University of MelbourneParkvilleVIC 3010Australia Melbourne Veterinary School Faculty of Veterinary and Agricultural SciencesThe University of MelbourneWerribeeVIC 3030Australia rivalea Australia Pty Ltd CorowaNSW 2646Australia Centre for Muscle research Department of Anatomy and PhysiologyThe University of MelbourneParkville 3010Australia Department of Animal Science Cornell UniversityIthacaNY 14853-4801USA Faculty of Biological Sciences The University of LeedsLeeds LS29JTUK

Background: There is evidence that sow heat stress(HS) during gestation affects fetal development with implications for impaired muscle growth. We have previously demonstrated that maternal HS during early to midgestation compromised muscle fibre hyperplasia in developing fetal pigs. Thus, we hypothesised these phenotypic changes are associated with a change in expression of genes regulating fetal skeletal muscle development and metabolism. To test this, at d 60 of gestation, rNA sequencing and immunohistochemistry were performed on fetal longissimus dorsi(LD) muscle biopsies collected from pregnant gilts that had experienced either thermoneutral control(CON, 20 ℃, n = 7 gilts, 18 LD samples) or controlled HS(cyclic 28 to 33 ℃, n = 8 gilts, 23 LD samples)conditions for 3 ***: A total of 282 genes were differentially expressed between the HS and CON groups in female LD muscles(false discovery rate(FDr) ≤ 0.05), whereas no differentially expressed genes were detected in male LD muscles between the two groups(FDr > 0.05). Gestational HS increased the expression of genes associated with transcription corepressor activity, adipogenesis cascades, negative regulation of angiogenesis and pro-inflammatory signalling in female LD muscles. Immunohistochemical analyses revealed a decreased muscle vascularity density in fetuses from HS group for both sexes compared to those from the CON group(P = 0.004).Conclusions: These results reveal gilt HS during early to mid-gestation altered gene expression profiles in fetal LD muscles in a sexually dimorphic manner. The molecular responses, including transcription and angiogenesis repressions and enhanced adipogenesis cascades, were exclusively observed in females. However, the associated reductions in muscle vascularity were observed independently of sexes. Collectively this may indicate female fetal pigs are more adaptive to gestational HS in terms of gene expression changes, and/or there may be sexually dimorphic differences

关键词： Adipogenesis Angiogenesis Fetal pig Gestation Heat stress Sexual dimorphism Skeletal muscle Sows

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Acid-insoluble ash is a better indigestible marker than chromic oxide to measure apparent total tract digestibility in pigs

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Animal Nutrition 2021年第1期7卷 64-71页

作者： Susanto Prawirodigdo Neil J.Gannon Brian J.Leury frank r.dunshea Faculty of Veterinary and Agricultural Sciences The University of MelbourneParkvilleVictoria3010Australia Balai Pengkajian Teknologi Pertanian Central Java SemarangCentral Java50552Indonesia Biomin Singapore PO Box 2419ToowoombaQLD4350Australia Faculty of Biological Sciences The University of LeedsLeedsLS29JTUnited Kingdom

The aim of this study was to determine the apparent total tract digestibility(ATTD)of nutrients in cottonseed meal(CSM)and soybean meal(SBM)in simple carbohydrate and more complex wheat-based diets using 2 indigestible markers and total faecal ***-five Large White×Landrace boars(57.8 kg)were randomly allocated to either a pure wheat diet,40%CSM or SBM in either a sugar-starch-(1∶1)or wheat-based diet for 18 ***-insoluble ash(AIA)and chromic oxide(Cr2O3)were included in all diets as indigestible *** were offered(1,800 g/d per pig)in 3 meals/d from d 1 to 11 and 8 meals/d from d 12 to *** d 9,the pigs were moved to individual metabolism cages to allow total faecal *** d 18,the pigs were fed hourly for 8 *** the 8th meal,pigs were anaesthetized and digesta sampled from the terminal ileum and rectum before lethal *** were no differences between ATTD of nitrogen(N)determined using AIA as a marker and measured by total faecal *** the other hand,the ATrD of N of diets containing CSM in sugar-starch-or wheat-based diets and the pure wheat diet determined using Cr2O3 as a marker was less(-3.11%,-4.46%and-6.59%;Pred by total faecal *** ATTD of N determined using AIA as a marker was highly correlated with that measured using total faecal collection(Pr2=0.95).Similarly,the ATTD of N determined using Cr2O3 as a marker was correlated with that measured using total faecal collection,although the correlation was not quite as strong as using AIA(Pr2=0.87).Also,the slope of the regression line and the intercept were closer to unity and zero for the relationship when the ATTD of N was determined using AIA compared to Cr2O3 as an indigestible *** ATTD of organic and dry matter behaved *** data demonstrate that the basal diet and choice of indigestible marker can substantially influence the ATTD and that the use of AIA as an indigestible marker is more suita

关键词： Organic matter Pig Wheat Cottonseed meal Soybean meal Digestibility Nitrogen

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Basal diet and indigestible marker influence apparent digestibilities of nitrogen and amino acids of cottonseed meal and soybean meal in pigs

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Animal Nutrition 2019年第3期5卷 234-240页

作者： Susanto Prawirodigdo Neil J.Gannon Brian J.Leury frank r.dunshea Faculty of Veterinary and Agricultural Sciences The University of MelbourneParkvilleVictoria3010Australia BPTP Central Java SemarangCentral Java50552Indonesia Biomin Singapore PO Box 2419ToowoombaQLD4350Australia

This study was to determine the apparent ileal nitrogen(N)and amino acid digestibilities of cottonseed meal(CSM)and soybean meal(SBM)in simple carbohydrate-based and more complex wheat-based *** five Large White × Landrace boars(40.9 kg)were randomly allocated to one of 5 dietary treatments:a wheat diet,40% CSM in either a sugar:starch(1:1)or wheat-based diet,or 40% SBM in either a sugar:starch or wheat-based diet for 14 *** diets contained vitamins,minerals,and contained acid-insoluble ash(AIA)and Cr2 O3 as indigestible *** were offered(1,800 g/pig per d)in3 meals/d on d 1-11 and 8 meals/d on d *** d 14,the pigs were fed hourly for 8 *** the 8 th meal,pigs were anaesthetised with isoflurothane,and ileal and faecal digesta sampled from the terminal ileum and rectum before lethal injection of *** ileal digestibility(AID)of N was greater(12.1%)when CSM was fed in the wheat-based diet as compared to the simple carbohydrate-based diet,whereas apparent ileal N digestibility of SBM was slightly lower(-4.5%)in the wheat-based diet as compared to the sugar:starch-based *** ileal amino acid digestibility generally respondeds similarly to ***,while there was a wide difference in apparent N and amino acid digestibilities of SBM and CSM when they were fed in the sugar:starch-based diets,these differences were less apparent when they were fed the wheat-based *** was an apparent net release of N into the hindgut of pigs fed CSM in both base ***,there was quite substantial apparent digestion of N in the hindgut of pigs fed SBM in both base *** use of Cr2 O3 as an indigestible marker resulted in lower apparent ileal and faecal digestibilities than using AIA,particularly for diets containing *** data demonstrate that the basal diet and choice of indigestible marker can substantially influence the estimate of apparent N digestibility,this response can differ for different protein meals.

关键词： Organic matter Pig Wheat Cottonseed meal Soybean meal Digestibility

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Dietary nano chromium picolinate can ameliorate some of the impacts of heat stress in cross-bred sheep

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Animal Nutrition 2021年第1期7卷 198-205页

作者： Alex T.Hung Brian J.Leury Matthew A.Sabin Fahri Fahri Kristy DiGiacomo Tu-Fa Lien frank r.dunshea Faculty of Veterinary and Agricultural Sciences The University of MelbourneParkvilleVIC3010Australia Murdoch Children's research Institute The University of MelbourneParkvilleVIC3010Australia Department of Animal Science National Chiayi UniversityChina Faculty of Biological Sciences The University of LeedsLeeds LS29JTUnited Kingdom

Two studies were conducted to evaluate the effect of nano chromium picolinate(nCrPic)during heat stress(HS)in *** the initial study,36 Merino×Poll cross-bred sheep were individually penned and allocated to 3 dietary treatments(0,400 and 800μg/kg nCrPic)for 8 *** composition was determined at the beginning and end of the experiment using dual energy X-ray *** sheep remained in their dietary groups but were then placed in metabolic cages and randomly allocated within the dietary group to differing ambient temperature regimes,i.e.,thermo-neutral(TN)(n=18)and HS(n=18),for 3 *** nCrPic had no effect on growth performance and body composition during the initial study conducted under TN *** stress decreased average daily feed intake(ADFI)(P=0.002)whereas sheep under HS had reduced average daily gain(ADG)and indeed lost weight(Pry nCrPic increased both ADFI(P=0.041)and ADG(P=0.049)under both TH and HS conditions such that the performance of sheep receiving supplemental nCrPic and exposed to HS was similar to that of control sheep maintained under TN *** stress increased rectal temperature(Prespiration rate(Prticularly during the hottest parts of the day as indicated by interactions(Prmal *** temperature was lower in sheep fed nCrPic(P=0.050),particularly under peak HS conditions during the afternoon as indicated by the interactions between dietary nCrPic and time of day(Pry nCrPic,thermal treat-ment and time of day(P=0.010).Similarly,respiration rate was lower in sheep fed nCrPic under peak HS conditions during the afternoon as indicated by the interactions between dietary nCrPic and thermal treatment(Pry nCrPic and time of day(P=0.030).In conclusion,dietary nCrPic can partially ameliorate the negative effects of HS as indicated by the maintenance of ADFI and decreased physiological responses,such as elevatio

关键词： Chromium picolinate Sheep Heat stress Nanotechnology Physiology

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Dietary stimulation of the endogenous somatotropic axis in weaner and growerfinisher pigs using medium chain triglycerides and cysteamine hydrochloride

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Journal of Animal Science and Biotechnology 2017年第2期8卷 405-416页

作者： David W.Miller Zoe Prosser Edward Y.W.Chee Christian F.Hansen frank r.dunshea Bruce P.Mullan John r.Pluske School of Veterinary and Life Sciences Murdoch UniversityMurdochWA6150Australia Department of Large Animal Sciences Faculty of Health and Medical SciencesUniversity of CopenhagenGroennegaardsvej 21870 Frederiksberg CDenmark Melbourne School of Land and Environment University of MelbourneParkvilleVlC 3051Australia Department of Agriculture and Food Western Australia Bentley Delivery CenterLocked Bag4BentleyWA 6983Australia

Background： Three experiments were conducted to examine the overall hypothesis that addition of medium chain triglycerides（MCT） and cysteamine hydrochloride（CSH） into the diets of young and growing pigs would stimulate the endogenous somatotropic axis to improve growth and ***： In Experiment 1, weaner pigs were given either a 5 d dietary supplement of 5 % MCT（n = 8） or a control diet（n = 8）. MCT increased the plasma concentration of growth hormone（GH; P ＆lt; 0.05） and the GH secretagogue,ghrelin（P ＆lt; 0.05）. Additionally, the MCT treatment reduced scouring（P ＆lt; 0.05）, maintained villous height in the small intestine（P ＆lt; 0.05） and stabilised daily weight gain（P ＆lt; 0.05）, compared to the controls. Experiment 2compared the effects of 4 levels（0, 1, 3 and 6 % v/v） of MCT supplementation in grower-finisher male pigs, of approximately 35 kg live weight（n = 15 per treatment）. Blood samples taken after 7 wk of treatment showed that the MCT supplementation increased circulating ghrelin（P ＆lt; 0.001）, GH（P ＆lt; 0.01） and insulin（P ＆lt; 0.05）concentrations in a dose-dependent manner. Daily weight gain, feed intake and feed conversion ratio were not affected by the MCT diets. In Experiment 3, 64 female pigs of approximately 60 kg live weight were allocated to one of three dietary treatments： control（n = 20）; 6 % MCT（n = 21）; and 70 mg/kg CSH（n = 21）. After 3 wk of supplementation, the MCT treated pigs had a higher plasma concentration of ghrelin compared to the control and CSH pigs（P ＆lt; 0.05）. Plasma concentrations of GH and weight were not affected by any of the dietary ***： Evidence is provided in Experiment 1 to support the use of dietary MCT supplements, perhaps acting via stimulation of somatotropic endocrine pathways, to minimise weaning-associated disorders such as slowing of growth and diarrhoea. In Experiments 2 and 3, although there was no effect on weight gain or feed conversion ratio in either experiment, MCT and CSH incr

关键词： Ghrelin Growth Pig Somatotropin

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Post-weaning and whole-of-life performance of pigs is determined by live weight at weaning and the complexity of the diet fed after weaning

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Animal Nutrition 2017年第4期3卷 372-379页

作者： Cherie L.Collins John r.Pluske rebecca S.Morrison Trevor N.McDonald robert J.Smits David J.Henman Ingunn Stensland frank r.dunshea rivalea Australia Pty Ltd School of Veterinary and Life Sciences Murdoch University Faculty of Veterinary and Agricultural Sciences The University of Melbourne

The production performance and financial outcomes associated with weaner diet complexity for pigs of different weight classes at weaning were examined in this experiment. A total of 720 weaner pigs(360 entire males and 360 females) were selected at weaning(27 ± 3 d) and allocated to pens of 10 based on individual weaning weight(light weaning weight: pigs below 6.5 kg; medium weaning weight: 6.5 to8 kg; heavy weaning weight: above 8.5 kg). Pens were then allocated in a 3 x 2 x 2 factorial arrangement of treatments with the respective factors being weaning weight(heavy, medium and light; H, M and L,respectively), weaner diet complexity(high complexity/cost, HC; low complexity/cost, LC), and gender(male and female). Common diets were fed to both treatment groups during the final 4 weeks of the weaner period(a period of 39 days). In the first 6 d after weaning, pigs offered the HC diets gained weight faster and used feed more efficiently than those offered the LC diets(P = 0.031). Pigs fed a HC diet after weaning tended to be heavier at the sale live weight of 123 d of age compared with pigs fed the LC diet(P = 0.056). There were no other main effects of the feeding program on growth performance through to slaughter. Weaning weight had a profound influence on lifetime growth performance and weight at 123 d of age, with H pigs at weaning increasing their weight advantage over the M and L pigs(101.3,97.1, 89.6 kg respectively, P re was a minimal benefit in terms of cost per unit live weight gain over lifetime when pigs were offered a HC feeding program to L,with a lower feed cost/kg gain. The results from this investigation confirm the impact of weaning weight on lifetime growth performance, and suggest that a HC feeding program should be focused on L weaner pigs(i.e., weaning weight less than 6.5 kg at 27 d of age) in order to maximise financial returns.

关键词： Pigs Performance Diet complexity Weaning weight Carcass characteristics Cost benefit analyses

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日粮中添加中链甘油三酯和半胱胺酸盐对断奶仔猪和生长育肥猪内源性生长轴的影响

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猪业科学 2016年第12期33卷 24-26页

作者：孟春春(译) david w.miller zoe prosser edward y.w.chee christian f.hansen frank r.dunshea bruce p.mullan john r.pluske 北京百迈客生物科技有限公司北京101300 不详

该文通过3个试验来检验总体假设,即在仔猪和生长猪的日粮中添加中链甘油三酯(MCT)和半胱胺酸盐(CSH)将会刺激其内源性生长轴,从而改善其生长和性能。试验1结果显示:日粮中添加MCT增加了断奶仔猪血浆中生长激素(GH)(P<0.05)和生长激素促... 详细信息

该文通过3个试验来检验总体假设,即在仔猪和生长猪的日粮中添加中链甘油三酯(MCT)和半胱胺酸盐(CSH)将会刺激其内源性生长轴,从而改善其生长和性能。试验1结果显示:日粮中添加MCT增加了断奶仔猪血浆中生长激素(GH)(Prelin)的浓度(Prelin)(Prelin浓度明显升高(P<0.05),而血浆GH浓度和体重则不受任何处理的影响。结论:试验1的结果表明日粮中添加MCT,可能是通过刺激生长激素内分泌途径将断奶相关病症(例如生长迟缓和腹泻)降到最低。在试验2和试验3中,尽管MCT和CSH的添加对猪只的增重或饲料转化率没有影响,但是增加了其生长轴的内分泌组分。

关键词： Ghrelin 生长猪促生长激素细胞

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