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Xing W, Li S. LncRNA ENSGALG00000021686 regulates fat metabolism in chicken hepatocytes via miR-146b/AGPAT2 pathway. Anim Genet 2024; 55:420-429. [PMID: 38369771 DOI: 10.1111/age.13405] [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: 12/03/2023] [Revised: 01/10/2024] [Accepted: 01/31/2024] [Indexed: 02/20/2024]
Abstract
The liver contributes to lipid metabolism as the hub of fat synthesis. Long non-coding RNAs (lncRNAs) are considered the regulators of cellular processes. Since LncRNA ENSGALG00000021686 (lncRNA 21 686) has been described as a regulator of lipid metabolism, the present study aimed to clarify the role of lncRNA 21 686 in chicken hepatocytes' lipid metabolism. Thirty-two chickens were divided into four groups and were treated with diets containing different amounts of fat, and the hepatic expression of lncRNA 21 686 and miR-146b along with the levels of proteins involved in the regulation of fat metabolism, lipid indices and oxidative stress were measured. Moreover, primary chicken hepatocytes were transfected with lncRNA 21 686 small interfering RNA or microRNA (miRNA, miR)-146b mimics to measure the consequences of suppressing lncRNA or inducing miRNA expression on the levels of proteins involved in fat metabolism and stress markers. The results showed that the high-fat diet modulated the expression of lncRNA 21 686 and miR-146b (p-value < 0.001). Moreover, there was a significant increase in 1-acyl-sn-glycerol-3-phosphate acyltransferase 2 (AGPAT2) gene expression and protein levels and modulated fat-related markers. Furthermore, the results showed that lncRNA 21 686 suppression reduced the expression of AGPAT2 and its downstream proteins (p-value < 0.05). Overexpression of miR-146b regulated fat metabolism indicator expression. Transfection experiments revealed that lncRNA 21 686 suppression increased miR-146b expression. The findings suggested a novel mechanism containing lncRNA 21 686/miR-146b/AGPAT2 in the regulation of fat metabolism in chicken hepatocytes.
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Affiliation(s)
- Wenhao Xing
- State Key Laboratory of Animal Nutrition, Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shijie Li
- Dongying Jintengsheng Medical Device Sales Co., Ltd., Dongying, Shandong Province, China
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2
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Murugesan S, Nidamanuri AL. Role of leptin and ghrelin in regulation of physiological functions of chicken. WORLD POULTRY SCI J 2022. [DOI: 10.1080/00439339.2022.2119917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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3
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Shaikat AH, Ochiai M, Sasaki A, Takeda M, Arima A, Ohkubo T. Leptin Modulates the mRNA Expression of Follicle Development Markers in Post-hatch Chicks in an Age-Dependent Manner. Front Physiol 2021; 12:657527. [PMID: 34305632 PMCID: PMC8293390 DOI: 10.3389/fphys.2021.657527] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 06/10/2021] [Indexed: 11/13/2022] Open
Abstract
Leptin is involved in regulating reproductive function in chickens, and the development of the leptin system is initiated during the early embryonic stage; however, whether leptin has a specific role in regulating the ovarian development in early post-hatch days is still not fully understood. This study investigated the expression of ovarian functional markers in growing juvenile chickens, along with the effects of leptin on gene expression in the hypothalamus–pituitary–gonadal (HPG) axis on specific ovarian-remodeling days. Leptin receptor (LEPR), follicle-stimulating hormone receptor (FSHR), and the mRNA expression of aromatase (CYP19A1) tended to increase with age in the ovaries of growing chicks. In the ovaries of 7-day-old chicks, intraperitoneally injected leptin significantly increased the mRNA expressions of LEPR, FSHR, and CYP19A1, and this resulted in the increased serum estradiol levels. However, leptin had no effect on hypothalamic LEPR, gonadotropin-releasing hormone 1 (GnRH1), or gonadotropin-inhibitory hormone (GnIH) mRNAs; however, in the pituitary gland, leptin significantly increased the mRNA expression of luteinizing hormone beta subunit (LHB) but had no effect on the mRNA expression of follicle-stimulating hormone beta subunit (FSHB). In 28-day-old chicks, hypothalamic and pituitary mRNAs were unaffected by leptin administration, except hypothalamic LEPR mRNA that was upregulated by a high dose of leptin. In the ovary, leptin dose-dependently decreased the mRNA expression of LEPR; low doses of leptin significantly increased the mRNA expression of FSHR, whereas high doses significantly decreased this expression; leptin did not affect the mRNA expression of CYP19A1; and high leptin doses significantly reduced the serum estradiol levels. Collectively, the results of this study show that leptin modulates ovarian development and folliculogenesis marker genes by primarily acting on ovaries on the specific ovarian-remodeling days in post-hatch chicks, which may alter folliculogenesis and ovarian development toward puberty in chicken.
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Affiliation(s)
- Amir Hossan Shaikat
- College of Agriculture, Ibaraki University, Ami, Japan.,United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Masami Ochiai
- College of Agriculture, Ibaraki University, Ami, Japan
| | - Akari Sasaki
- College of Agriculture, Ibaraki University, Ami, Japan
| | - Misa Takeda
- College of Agriculture, Ibaraki University, Ami, Japan.,United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
| | - Akari Arima
- College of Agriculture, Ibaraki University, Ami, Japan
| | - Takeshi Ohkubo
- College of Agriculture, Ibaraki University, Ami, Japan.,United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
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4
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Santonocito S, Polizzi A, Palazzo G, Isola G. The Emerging Role of microRNA in Periodontitis: Pathophysiology, Clinical Potential and Future Molecular Perspectives. Int J Mol Sci 2021; 22:5456. [PMID: 34064286 PMCID: PMC8196859 DOI: 10.3390/ijms22115456] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/17/2021] [Accepted: 05/21/2021] [Indexed: 02/07/2023] Open
Abstract
During the last few decades, it has been established that messenger ribonucleic acid (mRNA) transcription does not inevitably lead to protein translation, but there are numerous processes involved in post-transcriptional regulation, which is a continuously developing field of research. MicroRNAs (miRNAs) are a group of small non-coding RNAs, which negatively regulate protein expression and are implicated in several physiological and pathological mechanisms. Aberrant expression of miRNAs triggers dysregulation of multiple cellular processes involved in innate and adaptive immune responses. For many years, it was thought that miRNAs acted only within the cell in which they were synthesised, but, recently, they have been found outside cells bound to lipids and proteins, or enclosed in extracellular vesicles, namely exosomes. They can circulate throughout the body, transferring information between cells and altering gene expression in the recipient cells, as they can fuse with and be internalised by the recipient cells. Numerous studies on miRNAs have been conducted in order to identify possible biomarkers that can be used in the diagnosis of periodontal disease. However, as therapeutic agents, single miRNAs can target several genes and influence multiple regulatory networks. The aim of this review was to examine the molecular role of miRNAs and exosomes in the pathophysiology of periodontal disease and to evaluate possible clinical and future implications for a personalised therapeutical approach.
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Affiliation(s)
| | | | | | - Gaetano Isola
- Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy; (S.S.); (A.P.); (G.P.)
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5
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Zhang Z, Wen H, Peng B, Weng J, Zeng F. HFD-induced TRAF6 upregulation promotes liver cholesterol accumulation and fatty liver development via EZH2-mediated miR-429/PPARα axis. MOLECULAR THERAPY-NUCLEIC ACIDS 2021; 24:711-727. [PMID: 33996254 PMCID: PMC8099485 DOI: 10.1016/j.omtn.2021.01.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 01/20/2021] [Indexed: 12/17/2022]
Abstract
Despite the increasing prevalence of fatty liver diseases worldwide, the molecular mechanism underlying their pathogenesis remains poorly defined. This study examines the expression and significance of tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6) in the high-fat diet (HFD)-induced mouse obesity model and the oleic acid/palmitic acid (OA/PA)-induced cell model. After developing these models, we measured the expressions of TRAF6, enhancer of the zeste homolog 2 (EZH2), and peroxisome proliferator activated receptor alpha (PPARα). The expression of TRAF6, EZH2, and PPARα was manipulated to investigate their roles in cholesterol accumulation through evaluating the plasma levels of total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C). Co-immunoprecipitation (coIP) assay was used to determine the interaction between TRAF6 and EZH2 and chromatin immunoprecipitation (ChIP) assay to detect the enrichment of EZH2 and H3K27me3 in microRNA-429 (miR-429) promoter. We found that HFD resulted in elevated TRAF6 and miR-429 in fatty liver and reduced EZH2 and PPARα. TRAF6 mediated the ubiquitination of EZH2 and increased miR-429 expression, and miR-429 targeted PPARα. TRAF6 increased cholesterol accumulation in liver cells in vitro via the EZH2/miR-429/PPARα axis. Collectively, HFD upregulates TRAF6 and ubiquitinates EZH2 to promote the miR-429-dependent inhibition of PPARα, leading to cholesterol accumulation in liver and the occurrence of fatty liver.
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Affiliation(s)
- Zhi Zhang
- Department of Hepatobiliary Surgery, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou 510900, Guangdong Province, P.R. China
| | - Huiqing Wen
- Department of Hepatobiliary Surgery, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou 510900, Guangdong Province, P.R. China
| | - Bangjian Peng
- Department of Hepatobiliary Surgery, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou 510900, Guangdong Province, P.R. China
| | - Jun Weng
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, P.R. China
| | - Fanhong Zeng
- Department of Hepatobiliary Surgery II, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, P.R. China
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6
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Givisiez PEN, Moreira Filho ALB, Santos MRB, Oliveira HB, Ferket PR, Oliveira CJB, Malheiros RD. Chicken embryo development: metabolic and morphological basis for in ovo feeding technology. Poult Sci 2020; 99:6774-6782. [PMID: 33248593 PMCID: PMC7705034 DOI: 10.1016/j.psj.2020.09.074] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/22/2020] [Accepted: 09/28/2020] [Indexed: 12/16/2022] Open
Abstract
Broiler embryonic development depends on the nutrients that are available in the egg, which includes mostly water, lipids, and proteins. Carbohydrates represent less than 1%, and free glucose only 0.3%, of the total nutrients. Considering that energy requirements increase during incubation and metabolism is shifted toward the use of glycogen stores and gluconeogenesis from amino acids, extensive muscle protein degradation in the end of incubation can compromise chick development in the initial days after hatch. Significant prehatch changes occur in embryonic metabolism to parallel the rapid embryonic development. Oral consumption of the amniotic fluid begins around 17 d of incubation and promotes rapid development of the intestinal mucosa, which is characterized by morphological changes and increased expression and activity of enzymes and transporters. Furthermore, ingested substrates are stored as nutritional reserves to be used during hatching and in the first week after hatch. At hatch, this limited-nutrient store is directed to the functional development of the gastrointestinal tract to enable assimilation of exogenous nutrients. In ovo feeding is an alternative to deliver essential nutrients to chick embryos at this critical and challenging phase. The improved nutritional status and physiological changes triggered by in ovo feeding can resonate throughout the entire rearing period with significant health and economic gains. The present review addresses the main changes in metabolism and intestinal development throughout incubation, and also addresses scientific advances, limitations and future perspectives associated with the use of in ovo feeding that has been regarded as an important technology by the poultry industry.
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Affiliation(s)
| | | | - Maylane R B Santos
- Department of Animal Science, Federal University of Paraiba, Areia, Brazil
| | - Heraldo B Oliveira
- Department of Animal Science, Federal University of Pernambuco, Recife, Brazil
| | - Peter R Ferket
- Prestage Department of Poultry Science, NC State University, Raleigh, USA
| | - Celso J B Oliveira
- Department of Animal Science, Federal University of Paraiba, Areia, Brazil
| | - Ramon D Malheiros
- Prestage Department of Poultry Science, NC State University, Raleigh, USA
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7
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Mir BA, Reyer H, Komolka K, Ponsuksili S, Kühn C, Maak S. Differentially Expressed miRNA-Gene Targets Related to Intramuscular Fat in Musculus Longissimus Dorsi of Charolais × Holstein F 2-Crossbred Bulls. Genes (Basel) 2020; 11:genes11060700. [PMID: 32630492 PMCID: PMC7348786 DOI: 10.3390/genes11060700] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 12/12/2022] Open
Abstract
Intramuscular fat (IMF) is a meat quality indicator associated with taste and juiciness. IMF deposition, influenced by genetic and non-genetic factors, occurs through a transcriptionally coordinated process of adipogenesis. MicroRNAs (miRNAs) are transcriptional regulators of vital biological processes, including lipid metabolism and adipogenesis. However, in bovines, limited data on miRNA profiling and association with divergent intramuscular fat content, regulated exclusively by genetic parameters, have been reported. Here, a microarray experiment was performed to identify and characterize the miRNA expression pattern in the Musculus longissimus dorsi of F2-cross (Charolais × German Holstein) bulls with high and low IMF. A total of 38 differentially expressed miRNAs (DE miRNAs), including 33 upregulated and 5 downregulated (corrected p-value ≤ 0.05, FC ≥ ±1.2), were reported. Among DE miRNAs, the upregulated miRNAs miR-105a/b, miR-695, miR-1193, miR-1284, miR-1287-5p, miR-3128, miR-3178, miR-3910, miR-4443, miR-4445 and miR-4745, and the downregulated miRNAs miR-877-5p, miR-4487 and miR-4706 were identified as novel fat deposition regulators. DE miRNAs were further analyzed, along with previously identified differentially expressed genes (DEGs) from the same samples and predicted target genes, using multiple bioinformatic approaches, including target prediction tools and co-expression networks, as well as Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment. We identified DE miRNAs and their gene targets associated with bovine intramuscular adipogenesis, and we provide a basis for further functional investigations.
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Affiliation(s)
- Bilal Ahmad Mir
- Institute of Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany; (K.K.); (S.M.)
- Correspondence: ; Tel.: +49-38208-68885
| | - Henry Reyer
- Institute of Genome Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany; (H.R.); (S.P.); (C.K.)
| | - Katrin Komolka
- Institute of Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany; (K.K.); (S.M.)
| | - Siriluck Ponsuksili
- Institute of Genome Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany; (H.R.); (S.P.); (C.K.)
| | - Christa Kühn
- Institute of Genome Biology, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany; (H.R.); (S.P.); (C.K.)
| | - Steffen Maak
- Institute of Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology (FBN), D-18196 Dummerstorf, Germany; (K.K.); (S.M.)
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8
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Wróblewski A, Strycharz J, Świderska E, Drewniak K, Drzewoski J, Szemraj J, Kasznicki J, Śliwińska A. Molecular Insight into the Interaction between Epigenetics and Leptin in Metabolic Disorders. Nutrients 2019; 11:nu11081872. [PMID: 31408957 PMCID: PMC6723573 DOI: 10.3390/nu11081872] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/07/2019] [Accepted: 08/09/2019] [Indexed: 12/16/2022] Open
Abstract
Nowadays, it is well-known that the deregulation of epigenetic machinery is a common biological event leading to the development and progression of metabolic disorders. Moreover, the expression level and actions of leptin, a vast adipocytokine regulating energy metabolism, appear to be strongly associated with epigenetics. Therefore, the aim of this review was to summarize the current knowledge of the epigenetic regulation of leptin as well as the leptin-induced epigenetic modifications in metabolic disorders and associated phenomena. The collected data indicated that the deregulation of leptin expression and secretion that occurs during the course of metabolic diseases is underlain by a variation in the level of promoter methylation, the occurrence of histone modifications, along with miRNA interference. Furthermore, leptin was proven to epigenetically regulate several miRNAs and affect the activity of the histone deacetylases. These epigenetic modifications were observed in obesity, gestational diabetes, metabolic syndrome and concerned various molecular processes like glucose metabolism, insulin sensitivity, liver fibrosis, obesity-related carcinogenesis, adipogenesis or fetal/early postnatal programming. Moreover, the circulating miRNA profiles were associated with the plasma leptin level in metabolic syndrome, and miRNAs were found to be involved in hypothalamic leptin sensitivity. In summary, the evidence suggests that leptin is both a target and a mediator of epigenetic changes that develop in numerous tissues during metabolic disorders.
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Affiliation(s)
- Adam Wróblewski
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Str., 92-215 Lodz, Poland.
| | - Justyna Strycharz
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Str., 92-215 Lodz, Poland
| | - Ewa Świderska
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Str., 92-215 Lodz, Poland
| | - Karolina Drewniak
- Student Scientific Society of the Civilization Diseases, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Józef Drzewoski
- Central Teaching Hospital of the Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Janusz Szemraj
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Str., 92-215 Lodz, Poland
| | - Jacek Kasznicki
- Department of Internal Diseases, Diabetology and Clinical Pharmacology, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Agnieszka Śliwińska
- Department of Nucleic Acid Biochemistry, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland.
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9
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Korošec T, Tomažin U, Horvat S, Keber R, Salobir J. The diverse effects of α- and γ-tocopherol on chicken liver transcriptome. Poult Sci 2017; 96:667-680. [PMID: 27587731 DOI: 10.3382/ps/pew296] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 07/11/2016] [Indexed: 01/11/2023] Open
Abstract
α-Tocopherol is the form of vitamin E with the highest biological value and is almost exclusively considered as vitamin E in feed and feed supplements. Because γ-tocopherol, the predominant form of vitamin E naturally present in chicken feed, is not considered as a source of vitamin E, its re-evaluation with newer methods might be important.Despite γ-tocopherol's lower estimated biological value, it has been shown to be effective in reducing reactive nitrogen species, regulating immune and inflammatory processes, and diminishing the risk of metabolic perturbations and associated diseases. A 30-day nutritional trial in broiler chickens (Ross 308) was conducted to investigate how specific forms of vitamin E (α- and γ-tocopherol) and their combination impact liver gene expression when oxidative susceptibility of the organism is induced by high n-3 polyunsaturated fatty acids (PUFA) intake (linseed oil). Thirty-six one-day-old male broilers were fed a diet enriched with 5% linseed oil. A control group (Cont; N = 10) was used as a reference group, Tα (N = 10) was supplemented with 67 mg/kg RRR-α-tocopherol, Tγ (N = 8) with 67 mg/kg RRR-γ-tocopherol, and Tαγ (N = 8) with a combination of 33.5 mg/kg of each tocopherol. Beside oxidative stress indicators, whole chicken genome microarray analysis was performed on liver RNA and selected differentially expressed genes were confirmed by real time quantitative PCR. α-Tocopherol alone and in combination with γ-tocopherol was able to prevent lipid oxidation, which was also supported by transcriptome analysis. The effect of γ-tocopherol was evident in the expression of genes involved in inflammatory processes and immune response, while α-tocopherol affected genes involved in lipid and cholesterol metabolism. Both isomers of vitamin E influenced the transcription of genes, which are related to improved fat oxidation and enhanced glucose sparing.
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Affiliation(s)
- Tamara Korošec
- University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Groblje 3, 1230 Domžale, Slovenia
| | - Urška Tomažin
- Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000 Ljubljana, Slovenia
| | - Simon Horvat
- University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Groblje 3, 1230 Domžale, Slovenia.,National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana, Slovenia
| | - Rok Keber
- Laboratory of Host Defense, WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
| | - Janez Salobir
- University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Groblje 3, 1230 Domžale, Slovenia
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10
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Yuan L, Wang Y, Hu Y, Zhao R. In ovo leptin administration modulates glucocorticoid receptor mRNA expression specifically in the hypothalamus of broiler chickens. Neurosci Lett 2016; 638:181-188. [PMID: 27979697 DOI: 10.1016/j.neulet.2016.12.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/02/2016] [Accepted: 12/12/2016] [Indexed: 01/01/2023]
Abstract
The glucocorticoid receptor (GR) is well documented to play a crucial role in the central control of energy homeostasis in mammals. However, the distribution and function of the GR in the chicken brain are less clear. Leptin is a key hormone regulating energy homeostasis in mammals, yet its action in the chicken is still under debate. In this study, the distribution of GR mRNA in the chicken brain and the effects of in ovo administration of leptin and its antagonist on early post-hatch growth and GR mRNA expression in different hypothalamic nuclei were investigated via in situ hybridization (ISH) and quantitative PCR. GR mRNA was widely expressed in the chicken brain, mainly in the corpus striatum, nucleus rotundus, dorsolateral nucleus, nucleus ovoidalis, nucleus reticularis superior and the hippocampus (Hp) and in the preoptic area of the hypothalamus. High doses of leptin (5.0μg) significantly promoted post-hatch growth, resulting in a significant high body weight increased by 24.64% at day (D) 21 of life. Meanwhile, hypothalamic expression of GR mRNA in the LL and HL groups was down-regulated significantly by 7.02% and 13.65% respectively (P<0.05). ISH revealed region-specific changes: GR mRNA was found to be significantly decreased (P<0.05) in the paraventricular nucleus, periventricular nucleus and ventromedial nucleus but not in the Hp, infundibular nucleus or lateral hypothalamus of D21 broiler chickens. The leptin antagonist was able to reverse the effect of leptin on the growth rate and hypothalamic GR mRNA expression. These results provide evidence that in ovo administration of leptin influences early post-hatch growth and the hypothalamic expression of GR mRNA in broiler chickens.
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Affiliation(s)
- Lixia Yuan
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yufeng Wang
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yan Hu
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China; Key Laboratory of Poultry Heredity & Breeding, Institute of Poultry Science of Jiangsu Province, Yangzhou, 225003, PR China
| | - Ruqian Zhao
- Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing 210095, PR China.
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11
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Ban Q, Hui W, Cheng F, Liu D, Liu X. Effect of chicken leptin recptor short hairpin RNA on expression ofJAK2,STAT3,SOCS3andCPT1genes in chicken preadipocytes. Anim Sci J 2016; 88:559-564. [DOI: 10.1111/asj.12722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 08/24/2016] [Accepted: 08/30/2016] [Indexed: 12/23/2022]
Affiliation(s)
- Qian Ban
- School of Life Science; Anhui University; Hefei China
- College of Animal Science and Technology; Shihezi University; Shihezi China
| | - Wenqiao Hui
- Institute of Animal Science and Veterinary Medicine; Anhui Academy of Agricultural Sciences; Hefei China
- College of Animal Science and Technology; Shihezi University; Shihezi China
| | - Fei Cheng
- School of Life Science; Anhui University; Hefei China
| | - Dahai Liu
- School of Life Science; Anhui University; Hefei China
| | - Xiaojun Liu
- College of Animal Science and Veterinary Medicine; Henan Agricultural University; Zhengzhou China
- College of Animal Science and Technology; Shihezi University; Shihezi China
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12
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Wu SR, Guo W, Li YL, Ren XC, Lei XY, Li XY, Yao JH, Yang XJ. miRNA and piRNA expression profiles of breeder cock testes detected by next-generation sequencing. Reprod Domest Anim 2016; 52:203-213. [PMID: 27862381 DOI: 10.1111/rda.12880] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 09/25/2016] [Indexed: 11/29/2022]
Abstract
miRNAs are small non-coding regulatory RNAs that play key roles in diverse biological processes. In this study, we used the Solexa sequencing technique to profile miRNAs in breeder cock testes to illustrate their functions. A total of 663 co-expressed miRNAs and 3,180 co-expressed piRNAs were detected in three libraries. Based on Mir-X™ miRNA qRT-PCR, three miRNAs representing low, medium and high expression levels according to the sequencing results were selected randomly to validate the miRNAs' expression profiles. Results suggested that the miRNA expression profiles data could represent actual miRNA expression levels. Moreover, target genes prediction of the co-expressed miRNAs and further Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analyses were performed, which revealed that some candidate miRNAs were involved in the regulation of the spermatogenesis process, spermatozoa function and testicular metabolism. In conclusion, we provided a useful resource for further elucidation of the miRNAs' regulatory role in spermatogenesis, contributing to a preliminary database for functional and molecular mechanistic studies in testicular metabolism, spermatogenesis and other testes functions.
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Affiliation(s)
- S R Wu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - W Guo
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Y L Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - X C Ren
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - X Y Lei
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - X Y Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - J H Yao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - X J Yang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
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Liu Y, Guo W, Pu Z, Li X, Lei X, Yao J, Yang X. Developmental changes of Insulin-like growth factors in the liver and muscle of chick embryos. Poult Sci 2016; 95:1396-402. [PMID: 26944971 DOI: 10.3382/ps/pew043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/18/2015] [Indexed: 01/09/2023] Open
Abstract
The insulin-like growth factors ( IGFS: ) are synthesized in tissues and play an important role in embryonic development of avian via autocrine/paracrine mechanisms. In the study, mRNA expression of IGFs were detected by real-time PCR in the muscle and liver from d 10 to 20 of chick embryo ( E10: to E20: ). Methylation of IGF1 promoter in the muscle was analyzed by bisulfite sequencing PCR as well as IGF2 promoter in the liver. These results showed that there was obviously IGF1 expression in liver at E19 and E20. The higher IGF1 expression in muscle was found during E15 to E18 with the peak on E17, and then declined. Correspondingly, the lowest methylation level of IGF1 promoter was detectable on the same embryonic d 17. Expression of IGF2 in muscle increased gradually during embryonic growth and showed higher level in the later stages (E17 to E20) when IGF1 expression began to decrease. IGF2 expression in liver reached the first peak on E14, then declined but gradually elevated from E17. IGF2 promoter methylation in liver showed gradual decline on d 12, 15, 17 and 19 of incubation, meanwhile IGF2 expression of liver increased gradually. These results suggested that IGF1 and IGF2 might separately be more important for muscle and liver growth in chick embryonic development. Variation of IGFs expression during the incubation might be concerned with the methylation of gene promoter. The profile of IGFs expression in chick embryonic tissues may be meaningful for understanding organ growth and embryonic development in chick.
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Affiliation(s)
- Yanli Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, China, 712100
| | - Wei Guo
- College of Animal Science and Technology, Northwest A&F University, Yangling, China, 712100
| | - Zhenyu Pu
- College of Animal Science and Technology, Northwest A&F University, Yangling, China, 712100
| | - Xueyuan Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, China, 712100
| | - Xinyu Lei
- College of Animal Science and Technology, Northwest A&F University, Yangling, China, 712100
| | - Junhu Yao
- College of Animal Science and Technology, Northwest A&F University, Yangling, China, 712100
| | - Xiaojun Yang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China, 712100
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Wen R, Hu S, Xiao Q, Han C, Gan C, Gou H, Liu H, Li L, Xu H, He H, Wang J. Leptin exerts proliferative and anti-apoptotic effects on goose granulosa cells through the PI3K/Akt/mTOR signaling pathway. J Steroid Biochem Mol Biol 2015; 149:70-9. [PMID: 25576904 DOI: 10.1016/j.jsbmb.2015.01.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 12/08/2014] [Accepted: 01/03/2015] [Indexed: 01/30/2023]
Abstract
Leptin was known as a pivotal regulator for the control of food intake and energy expenditure. However, leptin has also been found to be involved in the regulation of female reproductive system through interactions with pathways in the hypothalamic-hypophyseal axis and direct action at the ovarian level. In the present study, granulosa cells from goose ovarian preovulatory (F1-F3) follicles were cultured with leptin (0, 1, 10 or 100ng/ml). The proliferative and anti-apoptotic actions of leptin in granulosa cells were revealed by CCK-8, BrdU and TUNEL assays. Quantitative real-time PCR and Western blot analyses further indicated that leptin treatment led to increased expression of cyclin D1, cyclin D2, cyclin D3 and bcl-2, and decreased expression of p21 and caspase-3. The effects were involved in the activation of the PI3K/Akt/mTOR signaling pathway, as leptin treatment enhanced the expression of PI3K, Akt1, Akt2, Raptor, mTOR, S6K and p-S6K. Moreover, blockade of the PI3K/Akt/mTOR pathway attenuated the influences of leptin on proliferation and apoptosis of granulosa cells, considering that activated factors by leptin were inhibited in the presence of either 20μM LY294002 (a PI3K inhibitor) or 10μM rapamycin (an mTOR inhibitor). In addition, leptin had a modulatory effect on the expression of its receptor at the transcriptional and translational levels, and blockade of PI3K/Akt/mTOR inhibited both basal and leptin-induced Lepr gene and protein expression. These findings suggest that leptin exerts its proliferative and anti-apoptotic effects on goose granulosa cells through the PI3K/Akt/mTOR signaling pathway via interaction with its receptor.
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Affiliation(s)
- Rui Wen
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Shenqiang Hu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Qihai Xiao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Chunchun Han
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Chao Gan
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Hua Gou
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Hehe Liu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Liang Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Hengyong Xu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Hua He
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
| | - Jiwen Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China.
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Kalea AZ, Hoteit R, Suvan J, Lovering RC, Palmen J, Cooper JA, Khodiyar VK, Harrington Z, Humphries SE, D'Aiuto F. Upregulation of gingival tissue miR-200b in obese periodontitis subjects. J Dent Res 2015; 94:59S-69S. [PMID: 25630869 DOI: 10.1177/0022034514568197] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Increased local immune and inflammatory responses in obese individuals with periodontitis may explain the aggressive clinical presentation and altered treatment response when compared to that of normal weight subjects. Our goal was to identify any differences in microRNA (miRNA) expression profiles of gingival tissue in periodontitis when obesity is present, which may suggest novel molecular pathways that this miRNA network may affect. Total RNA was extracted from gingival tissue biopsies collected from normal weight and obese individuals with periodontitis; miRNA expression profiling was performed with Affymetrix GeneChip miRNA 3.0 arrays; and results were validated with quantitative reverse transcription polymerase chain reaction (qRT-PCR). In silico identification of previously confirmed miRNA gene targets was conducted through miRTarBase and miRWalk databases, and pathway enrichment analysis identified enriched miRNA gene sets. Expression of selected genes in the same biopsy samples was tested with qRT-PCR. The gingival tissue miRNA profile of obese patients, compared to that of normal weight patients, showed 13 upregulated and 22 downregulated miRNAs, among which miR-200b was validated by qRT-PCR to be significantly increased in obesity. Functional analysis of 51 experimentally validated miR-200b gene targets identified enrichment of genes involved in cell motility, differentiation, DNA binding, response to stimulus, and vasculature development pathways not previously identified in the obesity-specific disease profile. Furthermore, the expression of the miR-200b gene targets ZEB1/2, GATA2, and KDR was confirmed by qRT-PCR as being lower in obese patients with periodontitis versus normal weight patients, suggesting a role of miR-200b in regulation of a set of gene targets and biological pathways relevant to wound healing and angiogenesis. Functional studies to explore the role of miR-200b in the above processes may offer new insights on putative therapeutic targets for this group of patients.
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Affiliation(s)
- A Z Kalea
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - R Hoteit
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - J Suvan
- Unit of Periodontology, Eastman Dental Institute, University College London, London, UK
| | - R C Lovering
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - J Palmen
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - J A Cooper
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - V K Khodiyar
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - Z Harrington
- Peninsula School of Dentistry, Plymouth University, Plymouth, UK
| | - S E Humphries
- Centre for Cardiovascular Genetics, Institute of Cardiovascular Science, University College London, London, UK
| | - F D'Aiuto
- Unit of Periodontology, Eastman Dental Institute, University College London, London, UK
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Prediction of LDL cholesterol response to statin using transcriptomic and genetic variation. Genome Biol 2014; 15:460. [PMID: 25316374 PMCID: PMC4180544 DOI: 10.1186/s13059-014-0460-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 09/03/2014] [Indexed: 01/01/2023] Open
Abstract
Background Statins are widely prescribed for lowering LDL-cholesterol (LDLC) levels and risk of cardiovascular disease. There is, however, substantial inter-individual variation in the magnitude of statin-induced LDLC reduction. To date, analysis of individual DNA sequence variants has explained only a small proportion of this variability. The present study was aimed at assessing whether transcriptomic analyses could be used to identify additional genetic contributions to inter-individual differences in statin efficacy. Results Using expression array data from immortalized lymphoblastoid cell lines derived from 372 participants of the Cholesterol and Pharmacogenetics clinical trial, we identify 100 signature genes differentiating high versus low statin responders. A radial-basis support vector machine prediction model of these signature genes explains 12.3% of the variance in statin-mediated LDLC change. Addition of SNPs either associated with expression levels of the signature genes (eQTLs) or previously reported to be associated with statin response in genome-wide association studies results in a combined model that predicts 15.0% of the variance. Notably, a model of the signature gene associated eQTLs alone explains up to 17.2% of the variance in the tails of a separate subset of the Cholesterol and Pharmacogenetics population. Furthermore, using a support vector machine classification model, we classify the most extreme 15% of high and low responders with high accuracy. Conclusions These results demonstrate that transcriptomic information can explain a substantial proportion of the variance in LDLC response to statin treatment, and suggest that this may provide a framework for identifying novel pathways that influence cholesterol metabolism. Electronic supplementary material The online version of this article (doi:10.1186/s13059-014-0460-9) contains supplementary material, which is available to authorized users.
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Hu S, Gan C, Wen R, Xiao Q, Gou H, Liu H, Zhang Y, Li L, Wang J. Role of leptin in the regulation of sterol/steroid biosynthesis in goose granulosa cells. Theriogenology 2014; 82:677-85. [DOI: 10.1016/j.theriogenology.2014.05.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 05/19/2014] [Accepted: 05/22/2014] [Indexed: 01/08/2023]
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Abstract
BACKGROUND A LEP transcript up-regulated in lungs of ducks (Anas platyrhynchos) infected by avian influenza A virus was recently described in the Nature Genetics manuscript that reported the duck genome. In vertebrates, LEP gene symbol is reserved for leptin, the key regulator of energy balance in mammals. RESULTS Launching an extensive search for this gene in the genome data that was submitted to the public databases along with duck genome manuscript and extending this search to all avian genomes in the whole-genome shotgun-sequencing database, we were able to report the first identification of coding sequences capable of encoding the full leptin protein precursor in wild birds. Gene structure, synteny and sequence-similarity (up to 54% identity and 68% similarity) to reptilian leptin evident in falcons (Falco peregrinus and cherrug), tits (Pseudopodoces humilis), finches (Taeniopygia guttata) and doves (Columba livia) confirmed that the bird leptin was a true ortholog of its mammalian form. Nevertheless, in duck, like other domestic fowls the LEP gene was not identifiable. CONCLUSION Lack of the LEP gene in poultry suggests that birds that have lost it are particularly suited to domestication. Identification of an intact avian gene for leptin in wild birds might explain in part the evolutionary conservation of its receptor in leptin-less fowls.
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Affiliation(s)
| | - Eyal Seroussi
- Institute of Animal Science, The Volcani Center, Rishon Le-Zion, Israel.
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Niacin in pharmacological doses alters microRNA expression in skeletal muscle of obese Zucker rats. PLoS One 2014; 9:e98313. [PMID: 24847987 PMCID: PMC4029970 DOI: 10.1371/journal.pone.0098313] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 04/30/2014] [Indexed: 01/21/2023] Open
Abstract
Administration of pharmacological niacin doses was recently reported to have pronounced effects on skeletal muscle gene expression and phenotype in obese Zucker rats, with the molecular mechanisms underlying the alteration of gene expression being completely unknown. Since miRNAs have been shown to play a critical role for gene expression through inducing miRNA-mRNA interactions which results in the degradation of specific mRNAs or the repression of protein translation, we herein aimed to investigate the influence of niacin at pharmacological doses on the miRNA expression profile in skeletal muscle of obese Zucker rats fed either a control diet with 30 mg supplemented niacin/kg diet or a high-niacin diet with 780 mg supplemented niacin/kg diet for 4 wk. miRNA microarray analysis revealed that 42 out of a total of 259 miRNAs were differentially expressed (adjusted P-value <0.05), 20 being down-regulated and 22 being up-regulated, between the niacin group and the control group. Using a biostatistics approach, we could demonstrate that the most strongly up-regulated (log2 ratio ≥0.5) and down-regulated (log2 ratio ≤-0.5) miRNAs target approximately 1,800 mRNAs. Gene-term enrichment analysis showed that many of the predicted target mRNAs from the most strongly regulated miRNAs were involved in molecular processes dealing with gene transcription such as DNA binding, transcription regulator activity, transcription factor binding and in important regulatory pathways such as Wnt signaling and MAPK signaling. In conclusion, the present study shows for the first time that pharmacological niacin doses alter the expression of miRNAs in skeletal muscle of obese Zucker rats and that the niacin-regulated miRNAs target a large set of genes and pathways which are involved in gene regulatory activity indicating that at least some of the recently reported effects of niacin on skeletal muscle gene expression and phenotype in obese Zucker rats are mediated through miRNA-mRNA interactions.
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