In addition to its role in energy storage, adipose tissue contributes substantially to energy metabolism, endocrine regulation, and inflammatory processes. Sujiang pigs, a hybrid breed approved by the National Livestock and Poultry Genetic Resources Committee of China as a new national breed in 2013, possess a genetic predisposition for substantial fat deposition, making them an ideal model for investigating the mechanisms underlying adipose tissue accumulation. In this study, back fat (BF; subcutaneous adipose tissue), greater omentum (GOM; visceral adipose tissue), and mesenteric adipose tissue (MAD; visceral adipose tissue) were collected from three 6-month-old male Sujiang pigs for RNA-seq analysis. Comparative analyses identified 3005 differentially expressed genes (DEGs) between BF and GOM, 975 DEGs between BF and MAD, and 892 DEGs between GOM and MAD. To validate the reliability of the sequencing data, five DEGs were randomly selected for RT-qPCR verification. The DEGs were further subjected to Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses. By integrating protein-protein interaction (PPI) networks with bioinformatics analyses, we identified candidate genes potentially associated with lipid metabolism (e.g., WNT9A, WNT5A, and PDGFRA) and inflammatory responses in adipose tissue (e.g., CSF1R, C1QB, and CD4). These findings indicate potential molecular differences between porcine visceral and subcutaneous adipose tissues and may serve as a reference for further studies on the molecular regulation of adipose tissue metabolism.

Background:MicroRNAs (miRNAs) play a crucial role in regulating the development of backfat, yet their specific regulatory functions remain incompletely understood. The main objective of this study was to reveal the regulatory mechanism of miRNAs in porcine backfat development, and the molecular regulatory mechanisms of adipocyte hyperplasia and hypertrophy. Methods and results:In this study, we used high-throughput sequencing technology to construct miRNA expression profiles of backfat tissue from Sujiang pigs at four developmental stages: 1, 3, 6, and 8 months old. A total of 292 known miRNAs and 274 novel miRNAs were identified. Through a comprehensive analysis of the miRNA and messenger RNA (mRNA) transcriptomes, we discovered many important mRNA-miRNA pairs during porcine backfat development. Functional analysis revealed that the PI3K-Akt signaling pathway, signaling pathways regulating pluripotency of stem cells, and mTOR signaling pathway as pivotal pathways related to adipocyte differentiation and hyperplasia. Butanoate metabolism, fatty acid metabolism, and fatty acid degradation were identified as pivotal pathways related to adipocyte metabolism and hypertrophy. Ssc-miR-1343, ssc-miR-1307, ssc-miR-1249, ssc-miR-331-3p, ssc-miR-296-5p, ssc-miR-149, ssc-miR-361-3p, and ssc-miR-615, which were identified as hub miRNAs in the miRNA-mRNA regulatory network, may play crucial roles in regulating backfat development. Further validation revealed that ssc-miR-1343 can directly target the TCF3 and FASN genes at different backfat developmental stages, potentially regulating adipocyte hyperplasia and hypertrophy. Conclusion:The comparative miRNA and mRNA transcriptomes analysis of porcine backfat tissue revealed the molecular regulatory mechanisms involved in porcine backfat development, providing useful information for the future breeding of pigs.

Fengjing pigs are a Chinese native breed known for their high reproductive ability. Runs of homozygosity (ROHs) have emerged as an effective tool for evaluating inbreeding levels and identifying relevant genes in selection. However, the declining population of Fengjing pigs in recent years has raised concerns about inbreeding. Therefore, this study aimed to investigate the ROH patterns, estimate genomic inbreeding levels, and identify candidate genes associated with economic traits using whole-genome resequencing data from 105 Fengjing pigs. A total of 2448 ROHs were identified, with an average of 23.31 ROHs per individual and an average length of 9.50 Mb. The inbreeding coefficient, based on ROHs, was 0.098. Additionally, three genomic regions with a high frequency of ROHs were identified. These regions contained 64 unique genes, including 14 genes associated with important economic traits. Moreover, six overlapping quantitative trait loci (QTLs) and four candidate genes (HSPG2, CDC42, EPHB2, and GRHL3) were identified on Sus scrofa chromosome (SSC) 6. These QTLs are associated with birth traits (health and reproductive efficiency) and meat development traits (meat quality and growth). This study identified many candidate genes and QTLs that overlapped with ROHs and are associated with economically significant traits. These findings can be used in future breeding, conservation, and utilization of specific Chinese native pig breeds.

Chronic diabetic wounds are difficult to treat due to imbalanced inflammatory responses, high blood glucose levels, and bacterial infections. Novel therapeutic approaches based on nucleic acid analogues have been proposed, with unique advantages in improving angiogenesis, increasing collagen synthesis, and exerting anti-inflammatory effects. However, the inherent electronegativity of nucleic acids makes them less susceptible to cellular uptake. In this paper, a kind of near infrared (NIR)-responsive nanocomposite hydrogel loaded with nucleic acid vectors was proposed for promoting wound healing. The redox system composed of molybdenum disulphide nanosheets (MoS2 NSs) initiated the copolymerization of quaternized chitosan containing double bonds and N-isopropylacrylamide (NIPAAm) to form the matrix. In addition, MoS2 NSs with photothermal conversion performance endow the nanocomposite hydrogel to have NIR-response property and act as physical crosslinking points in the matrix. Polydeoxyribonucleotides (PDRN), which have the effect of promoting wound healing, were made into nucleic acid vectors, and loaded into the NIR-responsive hydrogel. MoS2 NSs can convert NIR irradiation into heat, causing phase transitions of temperature-sensitive segments that trigger volume contraction of the hydrogel to extrude the nucleic acid vector. Promoting angiogenesis, slowing inflammation, and guiding tissue regeneration were demonstrated in the diabetic wound model treated with the NIR-responsive nanocomposite hydrogel.

Porcine epidemic diarrhea (PED) is a highly contagious disease caused by the porcine epidemic diarrhea virus (PEDV), which results in significant economic losses. PEDV infection causes severe damage to the midgut barrier in the small intestine. YBX3, an important protein in tight junctions, promotes epithelial cell proliferation. However, its role in the process of PEDV infection remains unclear. In this study, we observed a significant increase in mRNA expression of YBX3 following PEDV infection. Additionally, the protein expression of YBX3 showed an initial increase followed by a decrease over time. Furthermore, treatment with 2% DSS resulted in a significant down-regulation of YBX3 mRNA and protein expression. Furthermore, we successfully generated knockout and overexpression cell lines of YBX3. Preliminary assays indicated that elevated expression of YBX3 inhibited the PEDV replication, while knockout of YBX3 had the opposite effect. In conclusion, our study has preliminarily revealed the functional role of YBX3 during PEDV infection. This finding lays the foundation for further investigation into its mechanism in future and also provides new insights into the mechanism of PEDV-host interactions.

A 47-year-old Asian woman was admitted with worsening chest tightness and dyspnea for 10 days. Computed tomography (CT) showed changes in the trachea and segmental bronchi. Pulmonary function results suggestive of severe obstructive ventilatory dysfunction. Bronchoscopic findings showed the presence of multiple nodular lesions in the patient’s trachea and left and right main bronchi. Bronchoscopic biopsy, lymph node biopsy and bone marrow aspiration flow cytometry test results led to a definitive diagnosis of chronic lymphocytic leukemia (CLL), staged as Binet stage B and Rai stage 2.

Idiopathic pulmonary fibrosis (IPF) is a fibrosing interstitial pneumonia of unknown cause. The most typical characteristic of IPF is gradual weakening of pulmonary elasticity and increase in hardness/rigidity with aging. This study aims to identify a novel treatment approach for IPF and explore mechanism of mechanical stiffness underlying human umbilical cord mesenchymal stem cells (hucMSCs) therapy. Target ability of hucMSCs was examined by labeling with cell membrane dye Dil. Anti-pulmonary fibrosis effect of hucMSCs therapy by reducing mechanical stiffness was evaluated by lung function analysis and MicroCT imaging system and atomic force microscope in vivo and in vitro. Results showed that stiff environment of fibrogenesis caused cells to establish a mechanical connection between cytoplasm and nucleus, initiating expression of related mechanical genes such as Myo1c and F-actin. HucMSCs treatment blocked force transmission and reduced mechanical force. For further exploration of mechanism, ATGGAG was mutated to CTTGCG (the binding site of miR-136-5p) in the full-length sequence of circANKRD42. Wildtype and mutant plasmids of circANKRD42 were packaged into adenovirus vectors and sprayed into lungs of mice. Mechanistic dissection revealed that hucMSCs treatment repressed circANKRD42 reverse splicing biogenesis by inhibiting hnRNP L, which in turn promoted miR-136-5p binds to 3′-Untranslated Region (3′-UTR) of YAP1 mRNA directly, thus inhibiting translation of YAP1 and reducing YAP1 protein entering nucleus. The condition repressed expression of related mechanical genes to block force transmission and reduce mechanical forces. The mechanosensing mechanism mediated directly by circANKRD42-YAP1 axis in hucMSCs treatment, which has potential general applicability in IPF treatment.

克隆姜曲海猪质膜钙转运ATP酶1(ATPase Plasma Membrane Ca2+Transporting1,ATP2B1)基因CDS区序列,对其进行生物信息学分析,并探究ATP2B1基因在不同日龄姜曲海猪子宫组织的表达水平,以期为研究ATP2B1基因在姜曲海猪繁殖性能方面的作用提供参考依据,采用RT-PCR技术扩增姜曲海猪子宫ATP2B1基因CDS区序列,利用生物信息学软件对其进行分析,利用实时荧光定量PCR检测ATP2B1基因在1月龄和8月龄姜曲海猪子宫组织中的表达量.结果显示,姜曲海猪ATP2B1基因CDS区全长3 663 bp,编码1 220个氨基酸,与野猪同源性最高、亲缘关系最近.姜曲海猪ATP2B1蛋白分子质量约为134 737.94 u,原子总数为19 102个,理论等电点(pI)为5.63,带正电荷、负电荷的氨基酸数分别为141、161个.该蛋白最可能位于细胞膜上,为跨膜、非分泌型疏水蛋白质,有159个磷酸化位点和5个N-糖基化位点,无规则卷曲在预测的二级结构中占比最大.实时荧光定量PCR结果显示,ATP2B1基因在8月龄姜曲海猪子宫组织中的表达量显著低于1月龄姜曲海猪子宫组织(P＜0.05).本试验为探明ATP2B1基因对猪繁殖性状的影响提供了分子理论依据.

为了研究高强度人工选育下杜洛克猪群的近交情况和鉴定与经济性状相关的基因,本研究采用"中芯一号"50K SNP芯片对 96 头杜洛克猪进行全基因组检测.利用全基因组单核苷酸多态性(Single Nucleotide Polymorphisms,SNP)数据,计算多态信息含量(Polymorphism Information Content,PIC)、基于SNP分子信息的近交系数(FGRM);统计长纯合片段(Runs of Homozygosity,ROH)长度、数量及分布,计算基于ROH的近交系数(FROH)、在高频ROH区域鉴定候选功能基因.结果显示:多态信息含量为 0.27,最小等位基因频率(Minor Allele Frequency,MAF)为 0.26,平均观察杂合度(Observed Heterozygosity,Ho)为0.35,平均期望杂合度(Expected Heterozygosity,He)为 0.34,FHOM为 0.023,FGRM为-0.023.共检测到ROH 3151 个,平均长度 4.08 Mb,FROH_tatol为 0.059.在杜洛克猪群体中检测到 7 个高频ROH区域,分布在5 条染色体上,鉴定到 79 个基因.其中RAG2、RAG1、IL4、IL9、IL13、TRAF6与免疫功能相关,NEU2、SLC25A48和猪肌肉肉质相关,GDF9与猪卵母细胞发育相关、NPPC与猪发育青春期延迟相关,SAG与猪肌肉肉质和繁殖性能相关,MFAP3与猪的乳头对数数量相关,GRIA1与胴体品质相关.本研究结果为选育抗病力强、肉质优良、高繁殖力的杜洛克种猪提供理论依据.

试验旨在研究芽孢杆菌制剂对弱仔猪的生长性能、免疫性能、粪便菌群的影响.选择遗传背景、胎次、营养相同的28日龄断奶苏姜仔猪42头(公、母各半),随机分为2组,每组7个重复,每个重复3头.对照组猪为基础日粮,芽孢杆菌制剂组在基础日粮中添加1 kg/t芽孢杆菌制剂.试验期35 d.结果显示,与对照组相比,芽孢杆菌制剂组的仔猪平均日增重极显著提高(P<0.01),平均日采食量显著提高(P<0.05),腹泻率极显著降低(P<0.01).与对照组相比,芽孢杆菌制剂组仔猪粪便菌群厚壁菌门的相对丰度降低,拟杆菌门和螺旋体门的相对丰度增加;芽孢杆菌制剂组仔猪粪便菌群普雷沃氏菌属(Prevotella)、密螺旋体属(Treponema)、未指明的拟杆菌目(Unspecified_Bacteroidales)、未指明的拟杆菌目S24-7菌属(Unspecified_S24_7)相对丰度显著增加,未指明的毛螺菌科(Unspecified_Lachnospiraceae)、链球菌属(Streptococcus)、未指明的梭菌目(Unspecified_Clostridiales)、瘤胃球菌属(Ruminococcus)、劳特氏菌属(Blautia)相对丰度明显减少.研究表明,日粮中添加芽孢杆菌能够改善弱仔猪的生长性能,促进肠道有益生菌群生长繁殖.

为了加强高职院校畜牧兽医专业人才的思政素养和职业道德,提高专业课程的教学质量,以猪生产课程为例,根据专业课程的教学内容及教学特点,充分挖掘蕴含在课程知识内容及教学过程中的思政元素,探索将思政元素有机融入课程教学的实施路径,提出如何高质量推进课程思政教学的保障措施,为其他专业课程思政教学改革提供参考.

Increasing circular RNAs (circRNAs) are involved in the progression of idiopathic pulmonary fibrosis (IPF). However, circRNA biogenesis and circRNA-mediated crosstalk between mechanical stiffness and biochemical signals in IPF remain obscure. In this study, a novel circRNA-ankyrin repeat domain 42 (ANKRD42) from peripheral blood of patients with IPF, which participated in pulmonary fibrosis through the close communication of mechanical stiffness and biochemical signals, was identified. Mechanistic studies revealed that the heterogeneous nuclear ribonucleoprotein L (hnRNP L) activated the circANKRD42 reverse splicing biogenesis. The biogenetic circANKRD42 sponged miR-324-5p to promote the AJUBA expression, which blocked the binding between phosphorylated yes-associated protein 1 (YAP1) and large tumor suppressor kinase 1/2 (LATS1/2), leading to increased YAP1 entering the nucleus. circANKRD42 also sponged miR-136-5p to promote the YAP1 translation. Accumulating YAP1 in nucleus bound to TEAD, which initiated the transcription of genes related to mechanical stiffness. Finally, the therapeutic effect of circANKRD42 was evaluated in mice and the association between circANKRD42 and clinicopathological features was analyzed in IPF patients. Our findings supported that circANKRD42 is a promising biomarker and a potential therapeutic target related to cytoskeleton tension for IPF treatment.

Pulmonary fibrosis is characterized by the destruction of alveolar architecture and the irreversible scarring of lung parenchyma, with few therapeutic options and effective therapeutic drugs. Here, we demonstrate the anti-pulmonary fibrosis of 3-(4-methoxyphenyl)-4-oxo-4H-1-benzopyran-7-yl(αS)-α,3,4-trihydroxybenzenepropanoate (MOBT) in mice and a cell model induced by bleomycin and transforming growth factor-β1. The anti-pulmonary fibrosis of MOBT was evaluated using a MicroCT imaging system for small animals, lung function analysis and H&E and Masson staining. The results of RNA fluorescence in situ hybridization, chromatin immunoprecipitation (ChIP)-PCR, RNA immunoprecipitation, ChIP-seq, RNA-seq, and half-life experiments demonstrated the anti-pulmonary fibrotic mechanism. Mechanistic dissection showed that MOBT inhibited lncITPF transcription by preventing p-Smad2/3 translocation from the cytoplasm to the nucleus, resulting in a reduction in the amount of the lncITPF–hnRNP L complex. The decreased lncITPF–hnRNP L complex reduced MEF2c expression by blocking its alternative splicing, which in turn inhibited the expression of MEF2c target genes, such as TAGLN2 and FMN1. Briefly, MOBT alleviated pulmonary fibrosis through the lncITPF–hnRNP-l-complex-targeted MEF2c signaling pathway. We hope that this study will provide not only a new drug candidate but also a novel therapeutic drug target, which will bring new treatment strategies for pulmonary fibrosis.

旨在探讨生殖细胞核因子(nuclear receptor subfamily 6 group A member 1,NR6A1)和椎体发育同源物(vertebrae development homolog,VRTN)基因的多态性对苏姜猪体重、体长、体高、胸围、胸宽、臀宽和背膘厚7个生产性状的影响.试验利用PCR扩增和酶切片段多态性技术检测苏姜猪及其亲本猪品种中NR6A1和VRTN基因的多态性,并将NR6A1和VRTN基因的多态性与苏姜猪的生产性状进行关联性分析.遗传多态性分析结果表明,NR6A1基因p.Pro192Leu(g.299084751 C＞T)位点在姜曲海猪、枫泾猪和杜洛克猪群体中已经纯合,分别为CC、CC和TT基因型;在苏姜猪群体中有TT、TC和CC3种基因型,基因型频率分别为0.397、0.482和0.121,基因型分布频率符合哈迪温伯格平衡(Hardy-Weinberg equilibrium,HWE,P＞0.05),处于中度多态(0.25＜PIC＜0.5).VRTN 基因 g.20311_20312ins291 位点在枫泾猪群体中已经纯合,为 Del/Del基因型;在苏姜猪、姜曲海猪和杜洛克猪群体中存在遗传变异.VRTN基因g.20311_20312ins291位点在苏姜猪群体内有Ins/Ins、Ins/Del和Del/Del3种基因型,基因型频率分别为0.241、0.603和0.156,基因型分布频率不符合HWE(P＜0.05),处于中度多态(0.25＜PIC＜0.5).性状关联分析结果表明,NR6A1基因对苏姜猪体长、体高、胸围和背膘厚均有显著影响(P＜0.05),对其他性状无显著影响(P＞0.05),VRTN基因对苏姜猪胸围、胸宽和臀宽均有显著影响(P＜0.05),对其他性状无显著影响(P＞0.05).合并基因型对苏姜猪体长、胸围和背膘厚均有显著影响(P＜0.05),对其他性状无显著影响(P＞0.05).综上可知,NR6A1和VRTN基因对苏姜猪的生产性状具有一定影响,为后续应用NR6A1和VRTN基因辅助选育苏姜猪提供参考.

Idiopathic pulmonary fibrosis (IPF) is characterized by lung scarring and has no effective treatment. Fibroblast-to-myofibroblast differentiation and myofibroblast proliferation and migration are major clinical manifestations of this disease; hence, blocking these processes is a practical treatment strategy. Here, highly upregulated LINC00941/lncIAPF was found to accelerate pulmonary fibrosis by promoting fibroblast-to-myofibroblast differentiation and myofibroblast proliferation and migration. Assay for transposase-accessible chromatin using sequencing and chromatin immunoprecipitation experiments elucidated that histone 3 lysine 27 acetylation (H3K27ac) activated the chromosome region opening in the LINC00941 promoter. As a consequence, the transcription factor ATF3 (activating transcription factor 3) bound to this region, and LINC00941 transcription was enhanced. RNA affinity isolation, RNA immunoprecipitation (RIP), RNase-RIP, half-life analysis, and ubiquitination experiments unveiled that LINC00941 formed a RNA-protein complex with ELAVL1/HuR (ELAV like RNA binding protein 1) to exert its pro-fibrotic function. Dual-fluorescence mRFP-GFP-MAP1LC3/LC3 (microtubule associated protein 1 light chain 3) adenovirus monitoring technology, human autophagy RT2 profiler PCR array, and autophagic flux revealed that the LINC00941-ELAVL1 axis inhibited autophagosome fusion with a lysosome. ELAVL1 RIP-seq, RIP-PCR, mRNA stability, and rescue experiments showed that the LINC00941-ELAVL1 complex inhibited autophagy by controlling the stability of the target genes EZH2 (enhancer of zeste 2 polycomb repressive complex 2 subunit), STAT1 (signal transducer and activators of transcription 1) and FOXK1 (forkhead box K1). Finally, the therapeutic effect of LINC00941 was confirmed in a mouse model and patients with IPF. This work provides a therapeutic target and a new effective therapeutic strategy related to autophagy for IPF. Abbreviations: ACTA2/a-SMA: actin alpha 2, smooth muscle; ATF3: activating transcription factor 3; ATG: autophagy related; Baf-A1: bafilomycin A1; BLM: bleomycin; CDKN: cyclin dependent kinase inhibitor; CLN3: CLN3 lysosomal/endosomal transmembrane protein, battenin; COL1A: collagen type I alpha; COL3A: collagen type III alpha; CXCR4: C-X-C motif chemokine receptor 4; DRAM2: DNA damage regulated autophagy modulator 2; ELAVL1/HuR: ELAV like RNA binding protein 1; EZH2: enhancer of zeste 2 polycomb repressive complex 2 subunit; FADD: Fas associated via death domain; FAP/FAPα: fibroblast activation protein alpha; FOXK1: forkhead box K1; FVC: forced vital capacity; GABARAP: GABA type A receptor-associated protein; GABARAPL2: GABA type A receptor associated protein like 2; IGF1: insulin like growth factor 1; IPF: idiopathic pulmonary fibrosis; LAMP: lysosomal associated membrane protein; lncRNA: long noncoding RNA; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; NPC1: NPC intracellular cholesterol transporter 1; RGS: regulator of G protein signaling; RPLP0: ribosomal protein lateral stalk subunit P0; ROC: receiver operating characteristic; S100A4: S100 calcium binding protein A4; SQSTM1/p62: sequestosome 1; STAT1: signal transducers and activators of transcription 1; TGFB1/TGF-β1: transforming growth factor beta 1; TNF: tumor necrosis factor; UIP: usual interstitial pneumonia; ULK1: unc-51 like autophagy activating kinase 1; VIM: vimentin.

Sujiang pigs are a synthetic breed derived from Jiangquhai, Fengjing, and Duroc pigs. In this study, we sequenced the genome of 62 pigs with a coverage depth of 10× to 20×, including 27 Sujiang and 35 founder breed pigs, and we collected 360 global pigs' genome sequence data from public databases including 39 Duroc pigs. We obtained a high-quality variant dataset of 365 Sujiang pigs by imputing the porcine 80 K single nucleotide polymorphism (SNP) Beadchip to the whole-genome scale with a total of 422 pigs as a reference panel. A dataset of 365 imputated Sujiang pigs was used to perform single-trait genome-wide association study (GWAS) and meta-analyses for growth and fatness traits. Single-trait GWAS identified 1 907, 18, and 14 SNPs surpassing the suggestively significant threshold for backfat thickness, chest circumference, and chest width, respectively. Meta-analyses identified 2 400 genome-wide significant SNPs and 520 suggestively significant SNPs for backfat thickness and chest circumference, and 719 genome-wide significant SNPs and 1 225 suggestively significant SNPs for all seven traits. According to the meta-analysis of backfat thickness and chest circumference, a remarkable region of 2.69 Mb on Sus scrofa chromosome 4 containing FAM110B, IMPAD1, LYN, MOS, PENK, PLAG1, SDR16C5 and XKR4 was identified as a candidate region. The haplotype heat map of the 2.69 Mb region verified that Sujiang pigs were derived from Duroc and Chinese indigenous pigs, especially Jiangquhai pigs. The Kruskal-Wallis test showed that haplotypes of the 2.69 Mb region significantly affected backfat thickness and chest circumference traits. We then focused on PLAG1, an important growth-related gene, and identified two synonymous SNPs with obvious differences among different breeds in the PLAG1 gene. We then performed genotyping of 365 Sujiang, 150 Duroc, 95 Jiangquhai, and 100 Fengjing pigs to confirm the above result and verified that the two variants significantly affected phenotypes of growth and fatness traits. Our findings not only provide insights into the genetic architecture of porcine growth and fatness traits but also provide potential markers for selective breeding of these traits in Sujiang pigs.

高水平高职院校升格开展本科层次职业教育是我国完善现代职业教育体系的重要举措。为了了解本科生源与专科生源学习能力的差异，做好新升格院校的本科教育，就江苏农牧科技职业学院与金陵科技学院联合培养应用型本科畜牧兽医（动物科学4+0）专业学生与江苏农牧科技职业学院畜牧兽医三年制专科学生自学能力差异进行分析。结果显示两类学生自主学习能力水平不高，本科生源自我学习能力极显著高于专科生源。分析结果为因材施教进一步做好本科教育，提升教学质量提供参考。

为探明姜曲海猪感染猪肺炎支原体(Mycoplasma hyopneumoniae,Mhp)后肺组织环状RNA (circular RNA,circRNA)差异性表达谱及其在抗Mhp感染中的作用,试验以姜曲海猪为研究对象,分为感染组和对照组,人工感染Mhp 28 d后,解剖采集肺组织,采用高通量测序和生物信息学软件分析circRNA的表达情况.测序数据比对参考猪基因组序列,共鉴定到23632个circRNAs,差异表达circRNAs为213个,其中97个上调,116个下调.随机选择4个差异表达circRNAs进行实时荧光定量PCR验证,检测结果与测序结果基本一致.差异表达circRNA来源基因可注释到包括抗原加工递呈、溶酶体、白细胞跨内皮迁移等免疫应答信号通路.circRNA-miRN A-mRNA靶标关系分析显示,筛选到海绵结合miRNA数量最多的3个差异表达circRNAs,分别为:circRNA-17284 (21个)、circRNA-04848(19个)和circRNA-17270(19个);预测到6个与免疫调控相关的靶向miRNAs,分别为:ssc-miR-4331、ssc-miR-370、ssc-miR-328、ssc-miR-30c-3p、ssc-miR-122和ssc-miR-125b.本研究测定了感染Mhp的猪肺组织circRNA表达谱,筛选到与免疫调控相关的差异表达circRNA,这有助于阐明姜曲海猪对Mhp的易感机制,为抗病育种研究提供了参考依据.

高职畜牧兽医专业实训教学传统的教学模式,由于各种因素的限制,实训教学效果并不理想.在"智能+教育"的背景下,通过采用新技术、线上资源,实训教学可实现进一步的改革创新,提高教学的质量.本文分析了高职畜牧兽医专业实训教学现状及问题,探讨目前信息技术、线上教学资源在实训教学的应用,以期为实训信息化教学模式的革新提供参考.