共查询到19条相似文献，搜索用时 921 毫秒
1.
猪脂肪沉积相关的MicroRNA研究进展 总被引：1，自引：0，他引：1
随着人民生活水平的提高,人民需要更高品质的猪肉。而脂肪沉积与肉品质息息相关。MicroRNA(miRNA)是一类长度约为22nt的内源性非编码的小分子RNA,miRNA可靶向目的基因从而实现对猪脂肪沉积进行调控。研究表明,miR-27、miR-34、miR-125以及miR-130等miRNA家族参与猪脂肪沉积的调控。鉴于目前鲜有关于miRNA调控脂肪沉积的相关研究报道,故笔者就4个miRNA家族对脂肪沉积的调控展开重点论述,以期为今后开展miRNA调控脂肪沉积的研究提供理论依据和参考,进而有效地改善猪肉品质。 相似文献
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为了研究miRNA表达量与肉质风味表型指标的相关性,试验采用荧光定量PCR技术(Q-PCR)检测了4个猪种背最长肌中miR-27a和miR-378的差异表达。结果表明:背最长肌组织中2种miRNA的表达水平在4个猪种中趋于一致。相关性分析显示,2种miRNA在背最长肌中的表达水平与肌内脂肪含量和硫胺素含量呈正相关,与肌纤维直径、眼肌面积和瘦肉率呈负相关。表明miR-27a和miR-378对猪肉品质具有正调控作用,而对猪胴体品质具有负调控作用。该研究可为阐明miRNA在猪肌肉生长和脂肪沉积过程中的调控机制提供基础数据。 相似文献
3.
miR-1、miR-27a、miR-369和miR-378在7个地方猪种背最长肌中的表达与肉质性状的关系研究 总被引：1，自引：0，他引：1
实验采用荧光定量PCR技术(q-PCR)检测藏猪、成华猪、雅南猪、丫杈猪、青峪猪、内江猪和乌金猪7个地方猪种背最长肌中miR-1、miR-27a、miR-369、miR-378的差异表达,旨在研究miRNA表达量与肉质风味表型指标的相关性。结果表明:背最长肌组织中4种miRNA的表达水平在7个猪种中趋于一致,在藏猪、内江猪、雅南猪和成华猪中相对表达量较高,在丫杈猪和乌金猪中相对表达量较低;相关性分析显示,4种miRNA在背最长肌中的表达水平与肌内脂肪含量和硫胺素含量呈正相关,与肌纤维直径、眼肌面积和瘦肉率呈负相关,表明miR-1、miR-27a、miR-369和miR-378对猪肉品质具有正调控作用,而对猪胴体品质具有负调控作用。本研究可为阐明miRNA在猪肌肉生长和脂肪沉积过程中的调控机制提供基础数据。 相似文献
4.
《养猪》2019,(6)
为研究miRNA表达量与肉质风味的相关性,试验采用荧光定量PCR技术(Q-PCR)检测了4个猪种背最长肌中miR-23a、miR-151、miR-299、miR-199a和miR-497的差异表达。结果表明,miR-23a、miR-151在藏猪背最长肌中表达最高,miR-299、miR-199a和miR-497在约克夏猪背最长肌中表达最高;相关性分析显示,miR-23a、mi R-151在背最长肌中的表达水平与肌内脂肪含量和硫胺素含量呈正相关,与肌纤维面积、眼肌面积和瘦肉率呈负相关,miR-299、miR-199a和miR-497在背最长肌中的表达水平与肌内脂肪含量和硫胺素含量呈负相关,与肌纤维面积、眼肌面积和瘦肉率呈正相关。综上表明,miR-23a、miR-151对猪肉品质具有正调控作用,miR-299、miR-199a和miR-497对猪胴体品质具有正调控作用。 相似文献
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在人们日益提高的生活水平下,高品质猪肉逐渐成为消费者追求的目标。肌内脂肪的含量（IMF）是鉴别猪肉品质非常关键的参数,它能显著的改善猪肉的多汁性、嫩度和风昧等性状。怎样抑制脂肪组织中的脂肪含量增加的同时,促进肌肉组织中的脂肪含量增加,达到既能提高瘦肉率,减少脂肪含量,同时又能增加肌内脂肪含量的目标成为今后猪的育种工作重点。肌内脂肪沉积的影响因素有很多,最重要的因素是遗传因素。当前,国内外研究的热点是对控制猪IMF沉积相关基因的研究,其中的脂肪细胞定向和分化因子1（ADDI）基因直接或者间接影响着IMF的高低。ADDI基因是脂肪细胞定向和分化因子1（Adipocyto Detemination sad Differentiation factor-1）,又称固醇调节元件结合蛋白（Sterol Regulatory Blement-binging Protoins-lc, SREBPI-c）,作为固醇调节元件结合蛋白家族的一员,是脂肪细胞分化过程中重要的核转录因子,与SREBP-1a和SREBP-2-起调控脂肪酸和胆固醇的合成,且与脂肪分化相关的基因存在相互调控作用,是甘油三酯代谢、脂肪生成以及胰岛素敏感性之间连结的关键。众多关于猪ADD1基因的实验研究表明,ADD基因多态性与猪肌内脂肪、皮脂率和屠宰率等性状显著相关,ADDI基因很可能是影响猪肉质、胴体性状的候选基因。 相似文献
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猪肌纤维性状形成和肌内脂肪沉积的遗传机制 总被引：1，自引：0，他引：1
近年来,通过改变肌纤维性状和肌内脂肪含量改善猪肌肉品质成为科学家们研究的热点。肌纤维性状形成和肌内脂肪沉积是内因与外因共同作用的结果。作者对猪肌纤维性状形成和和肌内脂肪沉积的遗传机制进行了综述,以期寻求调控及改善猪肌肉品质的方法。猪肌纤维性状形成和肌内脂肪沉积的遗传机制非常复杂,受基因、转录因子及信号通路的复杂网络调控。猪肌纤维的生长发育主要受生肌决定因子（myogenic determinant,MyoD）基因家族和肌肉生长抑制素（myostatin,MSTN）基因一正一负协同调控。能量感应网络AMPK/SIRT1/PGC-1α在猪肌纤维类型转化中起重要作用。脂肪沉积相关基因的表达量与猪肌内脂肪沉积有密切关系。随着分子生物技术的不断发展,许多与肌纤维性状形成和肌内脂肪沉积的相关基因已被鉴定出来,有助于进一步揭示猪肌纤维性状形成和肌内脂肪沉积的遗传机制。 相似文献
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本研究旨在分析miR-199a-5p对猪肌内脂肪细胞脂质生成的影响及作用机制。采集淮南猪不同育肥时期（育肥前期、中期和后期）的背最长肌和皮下脂肪组织,通过实时荧光定量PCR分析其表达变化趋势;合成miR-199a-5p的mimics,转染猪原代肌内脂肪细胞,诱导分化后通过油红O染色观察过表达miR-199a-5p对脂质生成的影响;结合之前筛选到的脂肪型和瘦肉型猪差异表达mRNAs、lncRNAs和circRNAs,使用miRanda软件筛选miR-199a-5p的靶分子,并用GO和KEGG富集分析法对这些mRNAs、lncRNAs的共表达基因和circRNAs的来源基因进行功能分析。结果显示,随着育肥进程,miR-199a-5p在背最长肌中表达量持续上调,而在皮下脂肪组织中表达量先下调后上调;过表达miR-199a-5p可抑制肌内脂肪细胞的脂质生成。共筛选到9个mRNAs、5个lncRNAs和1 258个circRNAs包含miR-199a-5p结合位点,GO分析主要富集于内质网和肌动蛋白结合,KEGG分析发现主要富集于糖、脂质和蛋白质代谢。提示miR-199a-5p可能通过与lncRNAs和circRNAs互作间接调控靶基因,参与调控肌肉发育、脂质生成和代谢,可作为影响肉质性状的候选miRNA。 相似文献
9.
肌间脂肪含量与肉品质密切相关,决定着猪肉的风味、多汁性和嫩度等感官指标,因此,提高肌间脂肪沉积量对改善肉品质有重要作用。肌间脂肪沉积是一个复杂的生物学过程,受多种调控因子和成脂相关信号通路的影响,其中非编码RNA(non-coding RNA,ncRNA)对猪肌间脂肪沉积的调控作用引起了研究者的广泛关注。ncRNA是一类不编码蛋白质的RNA分子,在细胞增殖、分化、凋亡等多种生物学过程中发挥着调控作用。近年来研究表明,ncRNA中微小RNA(microRNA,miRNA)、长链非编码RNA(long non-coding RNA,lncRNA)和环状RNA(circular RNA,circRNA)均是肌间脂肪沉积的潜在调节因子,参与调控动物脂肪沉积过程。作者概述了ncRNA的生物学特性,介绍了肌间脂肪细胞的来源,总结了现阶段ncRNA在猪肌间脂肪沉积中的研究进展,以期为猪肉品质改良提供基础数据。 相似文献
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Jing Wang Youbing Yang Baosong Xing Junfeng Chen Qingxia Lu Jiaqing Zhang Qiaoling Ren Qiang Ma Hongxia Guo Hai Cao 《Animal Science Journal》2021,92(1):e13648
Circular RNAs (circRNAs) participated in regulation of lipid metabolism; however, its functional role on castration-induced lipid deposition has not been deeply researched. So in this research, we firstly compared circRNAs expressional differences in subcutaneous adipose tissue between intact and castrated male Huainan pigs. A total of 6116 differentially expressed circRNAs (DECs) were detected between these two groups (|log2foldchange| ≥ 1 and padj ≤ 0.05); GO and KEGG analysis showed that their parent genes were mainly enriched in metabolism-related pathway. And TGF-beta, insulin, AMPK, and MAPK pathways might play vital role in castration-induced lipid deposition. The miRNAs enriched in the constructed circRNA–miRNA network were mainly participated in adipogenesis and lipid metabolism, such as miR-143a-3p, miR-378, and miR-195. And it was verified that testosterone upregulated miR-181a but downregulated circ_0005912 expression in a dose-dependent manner in porcine intramuscular adipocytes, and overexpression of miR-181a inhibited circ_0005912. Taken together, these DECs may participate in the regulation of lipid metabolism after castration by reaction with miRNAs, which indicated the novel role of circRNAs in castration-induced lipid deposition. 相似文献
12.
本研究旨在分析miR-199a-5p对猪肌内脂肪细胞脂质生成的影响及作用机制。采集淮南猪不同育肥时期(育肥前期、中期和后期)的背最长肌和皮下脂肪组织,通过实时荧光定量PCR分析其表达变化趋势;合成miR-199a-5p的mimics,转染猪原代肌内脂肪细胞,诱导分化后通过油红O染色观察过表达miR-199a-5p对脂质生成的影响;结合之前筛选到的脂肪型和瘦肉型猪差异表达mRNAs、lncRNAs和circRNAs,使用miRanda软件筛选miR-199a-5p的靶分子,并用GO和KEGG富集分析法对这些mRNAs、lncRNAs的共表达基因和circRNAs的来源基因进行功能分析。结果显示,随着育肥进程,miR-199a-5p在背最长肌中表达量持续上调,而在皮下脂肪组织中表达量先下调后上调;过表达miR-199a-5p可抑制肌内脂肪细胞的脂质生成。共筛选到9个mRNAs、5个lncRNAs和1258个circRNAs包含miR-199a-5p结合位点,GO分析主要富集于内质网和肌动蛋白结合,KEGG分析发现主要富集于糖、脂质和蛋白质代谢。提示miR-199a-5p可能通过与lncRNAs和circRNAs互作间接调控靶基因,参与调控肌肉发育、脂质生成和代谢,可作为影响肉质性状的候选miRNA。 相似文献
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试验旨在挖掘高肌内脂肪（IMF）含量和低IMF含量鸡胸肌中差异表达的microRNA（miRNA）（DEM）,以期从miRNA角度探究鸡IMF沉积的分子调控机制。以120只沐川乌骨黑鸡为研究对象,采用高通量测序分别完成3个IMF含量极高（H组）和极低（L组）鸡胸肌组织的miRNA测序,测序结果经生物信息学分析,鉴定H和L组中差异表达的miRNAs,随机选择6个miRNAs进行实时荧光定量PCR验证。IMF含量测定结果表明,每只鸡平均100 g胸肌中IMF含量为4.08 g,H和L组IMF含量存在极显著差异（P<0.01）;6个测序文库结果表明,每个测序文库获得Clean reads均超过10 000 000条,Clean reads占Raw reads的百分比>93%,21~23 nt的small RNA（sRNA）数量占总sRNA的百分比>50%,其中22 nt长度的sRNA所占比例最高,平均GC碱基含量为48.95%,获得的测序数据可靠;6个测序文库中sRNA注释为rRNA、tRNA、snRNA、snoRNA以及重复序列的比例较低,分别为2.74%、1.85%、6.21%、1.58%、2.82%和2.81%;6个测序文库共鉴定已知miRNAs成熟体578个,miRNAs前体500个,鉴定差异表达的miRNAs 23个,其中H组中上调表达的miRNAs有16个,下调表达的miRNAs有7个;miRNA靶基因预测分析结果表明,23个差异表达miRNAs共预测靶基因628个;GO分析结果表明,共鉴定了30个显著富集GO条目,包括6个细胞成分、13个生物学过程和11个分子功能;KEGG富集分析表明,差异表达miRNA的靶基因显著富集于胰岛素信号通路、半乳糖代谢、脂肪细胞因子信号通路、鞘糖脂生物合成、糖酵解及淀粉和蔗糖代谢;实时荧光定量PCR结果表明,gga-miR-124a-3p、gga-let-7a-5p在H组中表达量极显著或显著高于L组（P<0.01;P<0.05）;gga-miR-19a-3p在H组中表达量极显著低于L组（P<0.01）,gga-miR-6553-3p和gga-miR-128-3p在H组中的表达量显著低于L组（P<0.05）,其表达趋势与测序结果一致。以上结果表明,差异表达的miRNA gga-miR-124a-3p、gga-let-7a-5p、gga-miR-6553-3p、gga-miR-128-3p和gga-miR-19a-3p参与脂肪生成,是鸡IMF含量调控重要的候选miRNAs,为阐释miRNA调控鸡IMF沉积分子机制提供理论基础。 相似文献
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microRNA（miRNA）是一类在真核生物中广泛存在的非编码小RNA，通过与目标基因的3'端非编码序列结合，在转录后水平上调控基因的表达，参与许多生物学过程，包括细胞生长、分化、增殖和凋亡等。miRNA的生物合成始于细胞核，分为3个阶段，即pri-miRNA、pre-miRNA、成熟的miRNA分子。前两个阶段在细胞核中完成，第三阶段转移到细胞质中完成。miRNA具有在真核细胞中广泛存在、长度21~24 nt、序列具有高度保守性3个特点。研究表明，miRNA参与调控猪胚胎期肌肉发育、胚后期肌肉生长及肉质性状形成，猪前体脂肪细胞分化和脂质沉积，猪体的免疫应答，以及影响病原与机体的相互作用等过程。因此，了解更多的猪miRNA研究进展，可以加深对猪肌肉发育、脂肪代谢、疾病免疫等分子机制的理解，为生猪的健康养殖提供参考。 相似文献
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研究旨在从香猪卵巢small RNA测序数据中挖掘调控香猪繁殖的microRNA （miRNA）,解析miRNA调控香猪卵巢功能及繁殖性状的分子机制,对于猪的遗传选育具有重要意义。研究选取发情期和间情期的香猪各4头,屠宰后取其卵巢组织,提取总RNA进行small RNA测序,利用生物信息学方法检测miRNA表达谱,筛选差异表达的miRNA,预测差异表达miRNA靶基因,并对靶基因进行GO功能富集和KEGG通路富集分析。结果显示,香猪卵巢组织中miRNA在染色体上呈不均匀分布,主要分布于1号染色体和X染色体上。香猪卵巢中共有627个已知猪miRNAs表达,其中有34个差异表达miRNAs,表达量前五的分别是miR-23、let-7i-5p、miR-103、miR-30e-5p和miR-1271-5p。GO功能分析结果显示,靶基因主要参与的生物学过程是细胞过程（cellular process）,主要分布于细胞（cell）,主要分子功能是结合（binding）;KEGG显著富集通路中,促性腺激素释放激素受体通路（gonadotropin-releasing hormone receptor pathway）、胰岛素样生长因子通路（IGF pathway）和表皮生长因子受体信号通路（EGF receptor signaling pathway）与卵母细胞的发育成熟相关,因此推测miR-23b、let-7i-5p、miR-103、miR-30e-5p和miR-1271-5p可能参与了香猪繁殖调控。本研究初步筛选出5个可能调控香猪繁殖性能的miRNAs,可为从分子水平提高香猪产仔数提供理论基础。 相似文献
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Xiaoli Xu Junchen Leng Xiao Zhang Terence D. Capellini Yuan Chen Liu Yang Zitong Chen Shuailong Zheng Xujia Zhang Siyuan Zhan Linjie Wang Tao Zhong Jiazhong Guo Lili Niu Yan Wang Dinghui Dai Hongping Zhang Li Li Jiaxue Cao 《Animal Science Journal》2021,92(1):e13631
Insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1) plays essential roles in the proliferation of skeletal muscle satellite cells (MuSCs). Increasing evidence has shown that IGF2BP1 regulates the expression of noncoding RNAs and mRNAs. However, the related molecular network remains to be fully understood. Therefore, we performed RNA sequencing and analyzed the microRNAs (miRNAs), long noncoding RNAs (lncRNAs), and mRNAs differentially expressed in goat MuSCs treated with IGF2BP1 overexpressing and empty vectors. A total of 36 miRNAs, 59 lncRNAs, and 44 mRNAs were differentially expressed caused by IGF2BP1. Expectedly, they were enriched in muscle development-related Rap1, PI3K-AKT, and FoxO signaling pathways. Finally, we constructed a lncRNA-miRNA-mRNA interaction network containing 30 lncRNAs, 15 miRNAs, and 34 mRNAs, in which several miRNAs, including miR-133a-3p, miR-204-5p, miR-125a-3p, miR-145-3p, and miR-423-5p, relate with cell growth and participate in muscle development. Overall, we constructed an IGF2BP1-related network, which provides new insight into the myogenic proliferation of goat. 相似文献
17.
Osamu Ichii Saori Otsuka Hiroshi Ohta Akira Yabuki Taro Horino Yasuhiro Kon 《Research in veterinary science》2014
MicroRNAs (miRNAs) play a role in the pathogenesis of certain diseases and may serve as biomarkers. Here, we present the first analysis of miRNA expression in the kidneys of healthy cats and dogs. Kidneys were divided into renal cortex (CO) and medulla (MD), and RNA sequence analysis was performed using the mouse genome as a reference. A total of 277, 276, 295, and 297 miRNAs were detected in cat CO, cat MD, dog CO, and dog MD, respectively. By comparing the expression ratio of CO to MD, we identified highly expressed miRNAs in each tissue as follows: 41 miRNAs including miR-192-5p in cat CO; 45 miRNAs including miR-323-3p in dog CO; 78 miRNAs including miR-20a-5p in cat MD; and 11 miRNAs including miR-132-5p in dog MD. Further, the target mRNAs of these miRNAs were identified. These data provide veterinary medicine critical information regarding renal miRNA expression. 相似文献
18.
Dilda F Gioia G Pisani L Restelli L Lecchi C Albonico F Bronzo V Mortarino M Ceciliani F 《Veterinary journal (London, England : 1997)》2012,192(3):514-516
MicroRNAs (miRNAs) are a family of regulatory molecules involved in many physiological processes, including activation of cells of the immune system. This study investigated the effect of Escherichia coli lipopolysaccharide (LPS) and Staphylococcus aureus enterotoxin B (SEB) on the expression of five miRNAs involved in the inflammatory response, including miR-9, miR-125 b, miR-155, miR-146 a and miR-223, in bovine CD14(+) cells (monocytes). Incubation of monocytes with SEB induced down-regulation of miR-155, miR-223 and miR-125 b, but not the anti-inflammatory miRNA miR-146 a. Conversely, incubation with LPS upregulated both miR-155 and miR-146 a. In vitro incubation of isolated CD14(+) bovine monocytes with LPS and SEB elicited different and opposite expression of miRNAs reportedly involved in inflammatory reactions. 相似文献
19.
Wangsheng Zhao Tajmal Hussain Solangi Yitao Wu Xiankang Yang Chuanfei Xu Hongmei Wang Xuxin Zheng Xin Cai Jiangjiang Zhu 《Reproduction in domestic animals》2021,56(4):555-576
The epididymis is the site of post-testicular sperm maturation, which constitutes the acquisition of sperm motility and the ability to recognize and fertilize oocytes. The role of miRNA in male reproductive system, including the control of different steps leading to proper fertilization such as gametogenesis, sperm maturation and maintenance of male fertility where the deletion of Dicer in mouse germ cells led to infertility, has been demonstrated. The identification of miRNA expression in a region-specific manner will therefore provide valuable insight into the functional differences between the regions of the epididymis. In this study, we employed RNA-seq technology to explore the expression pattern of miRNAs and establish some miRNAs of significant interest with regard to epididymal sperm maturation in the CY epididymis. We identified a total of 431 DE known miRNAs; 119, 185 and 127 DE miRNAs were detected for caput versus corpus, corpus versus cauda and caput versus cauda region pairs, respectively. Our results demonstrate region-specific miRNA expression in the CY epididymis. The GO and KEGG enrichment for the predicted target genes indicated the functional values of miRNAs. Furthermore, we observed that the expression of miR-200a was downregulated in the caput, compared with cauda. Since the family of miR-200 has previously been suggested to contribute to the distinct physiological function of sperm maturation in epididymis of adult rat, we speculate that the downregulation of miR-200a in CY caput epididymis may play an important role of sperm maturation in the epididymis of CY. Therefore, our findings may not only increase our understanding of the molecular mechanisms regulated by the miRNA functions in region-specific miRNA expression in the CY epididymis, it could provide a valuable information to understand the mechanism of male infertility of CY. 相似文献