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Sexual maturation in hens is not associated with increases in serum leptin and the expression of leptin receptor mRNA in hypothalamus

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Journal of Animal Science and Biotechnology 2013年第4期4卷 271-277页

作者： yingdong ni Jinfang Lv Shaoqing Wang Ruqian Zhao Key Laboratory of Animal Physiology & Biochemistry Nanjing Agricultural University Animal Science College Anhui Science and Technology University

Background： In mammals, leptin is an attractive candidate for mediating the metabolic signal and the reproductive function via the specific receptor in hypothalamus. However, till now, the role of leptin on reproduction in birds is less well established. This experiment was conducted to elucidate the role of leptin on the onset of reproduction in bird, as a first step, to detect the changes of peripheral leptin and leptin receptor mRNA expression in hypothalamus between mature and immature hens at the same age. 120 ISA brown pullets at D60 were allocated randomly into two groups, long light （LL） group being raised under artificial light regimes with incrementally increased light phase （from 8 L：]6D to 14 L：]2D） and short light （SL） group raised on consistent light （8 L：16D） for 12 wk. Results： The results showed that pullets in LL group reached sexual maturation 15 d earlier than those in SL group. Serum E2 showed a significant increase with age, but no difference was observed between two groups. Serum leptin concentration decreased significantly from D112 to D136 in LL, and was markedly higher in LL group than that in SL at D112, while there was no significant difference between two groups at D136. Leptin receptor and GnRH-I mRNA expression in hypothalamus were significantly increased with age, yet there was no significant difference between SL and LL chickens at the same age. The expression of FSH-13 and LH-13 mRNA in pituitary was increased with age but did not show significant difference between LL and gland, and decreased from D112 to D136 in LL but not groups at the same age. SL group. GnfiH-I mRNA expression was very rich in pinea n SL group, and there was no difference between two Conclusions： These results indicate that the earlier sexual maturation in hens induced by long-light regime is not accompanied with an increase in serum leptin or leptin receptor gene expression in hypothalamus, or genes expression in HPG axis.

关键词： Gonadatrophin Releasing hormone (GnRH) Hens Hypothalamus Leptin Sexual maturation

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Sodium butyrate alleviates fructose-induced non-alcoholic fatty liver disease by remodeling gut microbiota to promoteγ-amino butyric acid production

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Food Science and Human Wellness 2024年第2期13卷 961-971页

作者： Qu Chen Lei Wu Aijia Zhang Chen Wu Liuping Cai Yingping Xiao yingdong ni Key Laboratory of Animal Physiology and Biochemistry Ministry of Agriculture and Rural AffairsNanjing Agricultural UniversityNanjing 210095China State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Institute of Agro-product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhou 310022China

Sodium butyrate(NaB)can regulate lipid metabolism and inhibit hepatic *** study aimed to investigate whether NaB can alleviate fructose-induced hepat ic steatosis via remodeling the gut microbiota and evaluate the anti-fatty liver *** results showed that NaB and NaB-remodeled gut microbiota significantly alleviated fructose-induced hepatic steatosis and increased plasma uric acid and fructose ***,both NaB and NaB-remodeled gut microbiota increased the abundance of Lactobacillus and altered the levels of plasma amino acids(upregulating gamma-amino butyric acid(GABA)and downregulating L-glutamic acid and L-arginine)in fructose-exposed *** correlation analysis showed that GABA levels positively correlated with Lactobacillus abundance,and increased GABA levels might promote the reduction of the hepatic triglyceride *** studies confirmed that GABA significantly reduced lipid deposition in mouse hepatocytes induced via fructose pretreatment in *** findings suggested that NaB could ameliorate fructose-induced hepatic steatosis by regulating gut microbiota.

关键词： Butyrate Fructose Gut microbiota Hepatic steatosis

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Whole transcriptome analysis of RNA expression profiles reveals the potential regulating action of long noncoding RNA in lactating cows fed a high concentrate diet

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Animal Nutrition 2021年第4期7卷 1315-1328页

作者： Qu Chen Chen Wu Zhihao Yao Liuping Cai yingdong ni Shengyong Mao Ruqian Zhao Key Laboratory of Animal Physiology&Biochemistry Nanjing Agricultural UniversityNanjing 210095China Laboratory of Gastrointestinal Microbiology Jiangsu Key Laboratory of Gastrointestinal Nutrition and Animal HealthCollege of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095China

Subacute ruminal acidosis(SARA)is a common metabolic disease in the dairy farming industry which is usually caused by an excessive amount of high concentrate *** not only threatens animal welfare but also leads to economic losses in the farming *** liver plays an important role in the distribution of nutritional substances and metabolism;however,a high concentrate diet can cause hepatic metabolic disorders and liver ***,noncoding RNA has been considered as a critical regulator of hepatic disease,however,its role in the bovine liver is *** this study,12 mid-lactating dairy cows were randomly assigned to a control(CON)group(40% concentrate of dry matter,n=6)and a SARA group(60% concentrate of dry matter,n=6).After 21 d of treatment,all cows were sacrificed,and liver tissue samples were *** dairy cows were randomly selected from the CON and SARA groups respectively to perform whole transcriptome *** than 20,000 messenger RNA(mRNA),10,000 long noncoding RNA(lncRNA),3,500 circular RNA(circRNA)and 1,000 micro RNA(miRNA)were ***,43 mRNA,121 lncRNA and 3 miRNA were differentially expressed,whereas no obvious differentially expressed circRNA were detected between the 2 *** Ontology(GO)annotation revealed that the differentially expressed genes were mainly enriched in oxidoreductase activity,stress,metabolism,the immune response,cell apoptosis,and cell *** Encyclopedia of Genes and Genomes(KEGG)enrichment analysis showed that the deferentially expressed genes were highly enriched in the phosphatidylinositol 3 kinase(PI3) K-serine/threonine kinase(AKT)signaling pathway(P<0.05).According to KEGG pathway analysis,the differentially expressed lncRNA(DElncRNA)target genes were mainly related to proteasomes,peroxisomes,and the hypoxia-inducible factor-1 signaling pathway(P<0.005).Further bioinformatics and integrative analyses revealed that the lncRNA were strongly correlated with mRN

关键词： Whole transcriptome sequencing Liver High concentrate diet Dairy cow

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Comparative proteomic analysis of the effects of high-concentrate diet on the hepatic metabolism and inflammatory response in lactating dairy goats

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Journal of Animal Science and Biotechnology 2016年第2期7卷 217-227页

作者： Yongqian Duanmu Rihua Cong Shiyu Tao Jing Tian Haibo Dong Yuanshu Zhang yingdong ni Ruqian Zhao Key Laboratory of Animal Physiology & Biochemistry Ministry of AgricultureNanjing Agricultural University College of Veterinary Medicine Northwest A & F University

Background： To understand the impact of feeding a high-concentrate diet to mid-lactating goats for a long time on liver metabolism and inflammatory response, two dimensional polyacrylamide gel electrophoresis（2-DE） and real-time PCR method were employed to detect proteins differentially expressed in liver and their m RNAs expression in goats fed high concentrate diet（HC） or low concentrate diet（LC）. Twelve lactating dairy goats were randomly assigned to either a HC diet group（65 % concentrate of dry matter; n = 6） or a LC diet group（35 % concentrate of dry matter; n = 6） for 10 ***： Twenty differentially expressed spots（≥2.0-fold changes） in the hepatic tissues were excised and successfully identified using MALDI TOF/TOF. Of these, 8 proteins were up-regulated, while the rest 12 proteins were down-regulated in HC goats compared to LC. Differential expressed proteins including alpha enolase 1（ENO1）, glutamate dehydrogenase 1（GLUD1）, glutathione S-transferase A1（GSTA1）, ATP synthase subunit 5β（ATP5β）, superoxide dismutase [Cu-Zn]（SOD1）, cytochrom c oxidase subunit Via（COX6A1） and heat shock protein 60（HSP60） were further verified by real-time PCR and/or western blot at m RNA or protein expression level. Consistent with the 2-DE results, a significant decrease of β-actin protein expression and SOD enzyme activity was observed in liver of HC goats（P 〈 0.05）, while ENO1 protein expression was significantly up-regulated in HC compared to LC goats（P 〈 0.05）. However, western blot analysis did not show a significant difference of hepatic HSP60 protein between HC and LC group, which did not match the decrease of HSP60 content detected by 2-DE analysis. Real-time PCR showed that glutathione S-transferase P1（GSTP1） and SOD1 m RNA expression was significantly decreased in liver of HC goats, while cytochrom c oxidase（COX3） and ATPase 8（ATP8） m RNAs expression were markedly increased compared to LC（P 〈 0.05）. Gene Ontology（GO） analysis revealed that HC diet resulted in alt

关键词： High concentrate diet Lactating goats Liver Mitochondria Proteomics

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Effects of chronic dexamethasone administration on hyperglycemia and insulin release in goats

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Journal of Animal Science and Biotechnology 2018年第3期9卷 585-594页

作者： Liqiong niu Qu Chen Canfeng Hua Yali Geng Liuping Cai Shiyu Tao yingdong ni Ruqian Zhao Key Laboratory of Animal Physiology & Biochemistry Nanjing Agricultural University

Background: Dexamethasone(Dex), a synthetic glucocorticoid, is among the most commonly used drugs worldwide in animals and humans as an anti-inflammatory and immunosuppressive agent. GC has profound effects on plasma glucose level and other metabolic conditions. However, the effect of prolonged use of Dex on glucose metabolism in ruminants is still ***: Ten goats were randomly assigned to two groups: the control goats were injected with saline, and the Dex-treated goats were intramuscularly injected daily for 21 d with 0.2 mg/kg Dex. The results showed that plasma glucose and insulin concentrations were significantly increased after Dex administration(P 0.05). The expression of several key genes, involved in blood glucose regulation, was detected by real-time PCR in the small intestine, skeletal muscle and liver. The expression of glucose transporter type 2(GLUT2), sodium-glucose transporter 1(SGLT1) and sodium-potassium ATPase(Na-K/ATPase) in the small intestine were generally increased by Dex, and GLUT2 m RNA expression was significantly up-regulated(P nit(G6 PC), cytosolic form of phosphoenolpyruvate carboxykinase(PCK1) and pyruvate carboxylase(PC), were significantly down-regulated by Dex. However, the protein expression levels of PCK1 & PCK2 were significantly increased by Dex, suggesting a post-transcriptional regulation. In dorsal longissimus, the m RNA expression of genes associated with gluconeogenesis and the insulin signaling pathway were generally upregulated by Dex, but the m RNA expression of two markers of muscle atrophy, namely F-box protein 32(FBXO32/Atrogin1) and muscle RING-finger protein 1(Mu RF1), was not altered by ***

关键词： Blood glucose Dexamethasone Gluconeogenesis Goat Liver

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Negative effects of long-term feeding of high-grain diets to lactating goats on milk fat production and composition by regulating gene expression and DNA methylation in the mammary gland

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Journal of Animal Science and Biotechnology 2018年第1期9卷 217-227页

作者： Ping Tian Yanwen Luo Xian Li Jing Tian Shiyu Tao Canfeng Hua Yali Geng yingdong ni Ruqian Zhao Key Laboratory of Animal Physiology&Biochemistry Nanjing Agricultural University College of Veterinary Medicine Northwest A and F University

Background： It is well known that feeding a high concentrate（HC） diet to lactating ruminants likely induces subacute ruminal acidosis（SARA） and leads to a decrease in milk fat production. However, the effects of feeding a HC diet for long periods on milk fatty acids composition and the mechanism behind the decline of milk fat still remains poorly understood. The aim of this study was to investigate the impact of feeding a HC diet to lactating dairy goats on milk fat yield and fatty acids composition with an emphasis on the mechanisms underlying the milk fat depression. Seventeen mid-lactating dairy goats were randomly allocated to three groups. The control treatment was fed a low-concentrate diet（35% concentrate, n = 5, LC） and there were two high-concentrate treatments（65% concentrate, HC）, one fed a high concentrate diet for a long period（19 wks, n = 7, HL）; one fed a high concentrate diet for a short period of time（4 wk, n = 5, HS）. Milk fat production and fatty acids profiles were measured. In order to investigate the mechanisms underlying the changes in milk fat production and composition,the gene expression involved in lipid metabolism and DNA methylation in the mammary gland were also ***： Milk production was increased by feeding the HC diet in the HS and HL groups compared with the LC diet（P 〈 0.01）, while the percentage of milk fat was lower in the HL（P 〈 0.05） but not in the HS group. The total amount of saturated fatty acids（SFA） in the milk was not changed by feeding the HC diet, whereas the levels of unsaturated fatty acids（UFA） and monounsaturated fatty acids（MUFA） were markedly decreased in the HL group compared with the LC group（P 〈 0.05）. Among these fatty acids, the concentrations of C15：0（P 〈 0.01）, C17：0（P 〈 0.01）, C17：1（P 〈 0.01）, C18：1 n-9 c（P 〈 0.05）, C18：3 n-3 r（P 〈 0.01） and C20：0（P 〈 0.01） were markedly lower in the HL group, and the concentrations of C20：0（P 〈 0.05） and C18：3 n-3 r（P 〈 0.01） were lower in the HS group compared

关键词： DNA methylation Gene expression Goat High concentrate diet Milk fat

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Early-age feed restriction affects viability and gene expression of satellite cells isolated from the gastrocnemius muscle of broiler chicks

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Journal of Animal Science and Biotechnology 2013年第1期4卷 49-57页

作者： Yue Li Xiaojing Yang yingdong ni Eddy Decuypere Johan Buyse Nadia Everaert Roland Grossmann Ruqian Zhao Key Laboratory of Animal Physiology & Biochemistry Nanjing Agricultural University Laboratory of Livestock Physiology Department of Functional Genomics & Bioregulation Institute of Animal Genetics Mariensee

Background： Muscle growth depends on the fusion of proliferate satellite cells to existing myofibers. We reported previously that 0-14 day intermittent feeding led to persistent retardation in myofiber hypertrophy. However, how satellite cells respond to such nutritional insult has not been adequately elucidated. Results： One-day-old broiler chicks were allocated to control （Con, ad libitum feeding）, intermittent feeding （IF, feed provided on alternate days） and re-feeding （RF, 2 days ad libitum feeding after 12 days of intermittent feeding） groups. Chickens were killed on Day 15 and satellite cells were isolated. When cultured, satellite cells from the IF group demonstrated significant retardation in proliferation and differentiation potential, while RF partly restored the proliferation rate and differentiation potential of the satellite cells. Significant up-regulation of insulin like growth factor I receptor （IGF-IR）（P〈O.05） and thyroid hormone receptor o （TRo）（P〈O.05）, and down-regulation of growth hormone receptor （GHR）（P〈O.01） and IGF-I （P〈O.01） mRNA expression was observed in freshly isolated IF satellite cells when compared with Con cells. In RF cells, the mRNA expression of IGF-I was higher （P〈O.05） and of TRa was lower （P〈O.01） than in IF cells, suggesting that RF restored the mRNA expression of TRa and IGF-I, but not of GHR and IGF-IR. The Bax/Bcl-2 ratio tended to increase in the IF group, which was reversed in the RF group （P〈O.05）, indicating that RF reduced the pro-apoptotic influence of iF. Moreover, no significant effect of T3 was detected on cell survival in IF cells compared with Con （P〈O.O01） or RF （P〈O.05） cells. Conclusions： These data suggest that early-age feed restriction inhibits the proliferation and differentiation of satellite cells, induces changes in mRNA expression of the GH/IGF-I and thyroid hormone receptors in satellite cells, as well as blunted sensitivity of satellite cells to T3, and that RF partially reverses these effects.

关键词： Feed restriction Satellite cells Proliferation Gene expression Chicken

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Embryonic exposure to corticosterone modifies the Chicks Aggressive Behavior Mediated by Serotogenic System

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畜牧与兽医 2012年第S1期44卷 300-300页

作者： Abdelkareem A. Ahmed Wenqiang Ma yingdong ni Zhou Qin Ruqian Zhao Key Laboratory of Animal Physiology and Biochemistry Ministry of Agriculture Nanjing Agricultural University

Expoure to maternal derived glucocorticoid during embryonic development influences offspring phenotypic and *** is thought to affects chicks behaviors including begging and aggressive ***(5-HT)regulates aggressive behavior via binding to its receptors such as 5-HT1A and *** has been reported that the aggressive behavior is associated with

关键词： exposure phenotypic maternal offspring aggressive glucocorticoid affects embryonic displayed suppressed

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Differences in egg deposition of corticosterone and embryonic expression of corticosterone metabolic enzymes between slow and fast growing broiler chickens

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畜牧与兽医 2012年第S1期44卷 224-224页

作者： Abdelkareem A. Ahmed Wenqiang Ma Feng Guo yingdong ni Roland Grossmann Ruqian Zhao Key Laboratory of Animal Physiology and Biochemistry Ministry of Agriculture Nanjing Agricultural University Department of Functional Genomics & Bioregulation Institute of Animal GeneticsFLI Mariensee

Glucocorticoids(GCs)is vital for embryonic development and their bioactivity is regulated by the intracellular metabolism involving 11β-hydroxysteroid dehydrogenases(11β-HSDs)and20-hydroxysteroid dehydrogenase(20HSD).Here we sought to reveal the differences in egg deposition of corticosterone and embryonic expression of corticosterone metabolic enzymes between slow and fast growing broiler *** of fast-growing breed contained significantly higher(P<0.05)

关键词： embryonic enzymes dehydrogenase metabolism sought vital contained bioactivity breed intracellular

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饲料中添加复合胆汁酸对皮质酮诱导的肉鸡脂肪肝综合征的缓解作用研究

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南京农业大学学报 2024年第1期47卷 44-51页

作者：胡丹郝燕青陈渠邬晓婷倪迎冬南京农业大学动物医学院/农业农村部动物生理生化重点实验室江苏南京210095

[目的]本试验旨在探究饲料中添加胆汁酸(bile acid,BA)对皮质酮(corticosterone,CORT)诱导的肉鸡脂肪肝综合征的缓解作用。[方法]试验选取了120只1日龄雄性AA肉鸡,随机分为2组,分别饲喂基础日粮和含BA日粮。BA添加分为前期、中期、后期... 详细信息

[目的]本试验旨在探究饲料中添加胆汁酸(bile acid,BA)对皮质酮(corticosterone,CORT)诱导的肉鸡脂肪肝综合征的缓解作用。[方法]试验选取了120只1日龄雄性AA肉鸡,随机分为2组,分别饲喂基础日粮和含BA日粮。BA添加分为前期、中期、后期3个阶段,剂量依次递增。28日龄时,从基础日粮组中选取肉鸡20只,随机分为对照组(control,CON)、皮质酮处理组(CORT);从胆汁添加组中随机选取10只设为皮质酮+胆汁酸组(CORT+BA)。CON组颈部皮下注射乙醇PBS溶液(15%乙醇),CORT组和CORT+BA组注射4 mg·kg^(-1) CORT,连续注射7 d。肉鸡40日龄屠宰采样,记录器官与组织质量,采集血清和肝脏组织以测定生化指标、脂代谢相关基因和蛋白表达水平。[结果]饲料中添加BA可显著缓解由CORT处理引起的腹脂率升高及腿肌重降低(P<0.05)。生化测定结果表明,CORT处理显著降低了40日龄肉鸡血清中高密度脂蛋白(HDLC)水平、增加游离脂肪酸(NEFA)水平,而BA处理显著升高血清HDLC水平(P<0.05)。与CON组相比,CORT组肉鸡肝脏内甘油三酯(TG)水平显著升高(P<0.01),肝细胞内脂滴显著富集且出现空泡化现象,而BA处理可显著缓解肝脏内的TG沉积(P<0.01)。CORT处理显著上调肝脏中硬脂酰辅酶A去饱和酶(scd1)和乙酰辅酶A羧化酶(acc)基因表达水平(P<0.05),显著上调ACC和脂肪酸合成酶(FASN)蛋白表达水平(P<0.05),同时下调过氧化物增殖激活受体(PPARα)蛋白的表达水平(P<0.05);BA处理可显著逆转皮质酮引起的以上基因和蛋白表达变化,并显著增加肉毒碱棕榈酰基转移酶1A(cpt1a)基因表达水平,显著降低脂肪酸转位酶(CD36)蛋白表达水平(P<0.05)。[结论]日粮中添加胆汁酸可减少肝脏内甘油三酯合成,促进其分解,抑制肝细胞对脂肪酸的摄取,从而缓解皮质酮诱导的肉鸡脂肪肝综合征。

关键词：胆汁酸皮质酮脂肪肝综合征肉鸡

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