• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊
  • 中国农林核心期刊(A类)
  • 中国高校百佳科技期刊

鸡白痢沙门氏菌感染对雏鸡脾脏miRNA表达谱的影响

白潜, 陈远红, 陈曦, 江康峰, 叶玮琪, 向斌, 杨亮宇, 杨静

白潜, 陈远红, 陈曦, 等. 鸡白痢沙门氏菌感染对雏鸡脾脏miRNA表达谱的影响[J]. 云南农业大学学报(自然科学), 2023, 38(2): 220-227. DOI: 10.12101/j.issn.1004-390X(n).202205004
引用本文: 白潜, 陈远红, 陈曦, 等. 鸡白痢沙门氏菌感染对雏鸡脾脏miRNA表达谱的影响[J]. 云南农业大学学报(自然科学), 2023, 38(2): 220-227. DOI: 10.12101/j.issn.1004-390X(n).202205004
Qian BAI, Yuanhong CHEN, Xi CHEN, et al. Effects of Salmonella Pullorum Infection on miRNA Expression Profiles in Spleen of Chicks[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY(Natural Science), 2023, 38(2): 220-227. DOI: 10.12101/j.issn.1004-390X(n).202205004
Citation: Qian BAI, Yuanhong CHEN, Xi CHEN, et al. Effects of Salmonella Pullorum Infection on miRNA Expression Profiles in Spleen of Chicks[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY(Natural Science), 2023, 38(2): 220-227. DOI: 10.12101/j.issn.1004-390X(n).202205004

鸡白痢沙门氏菌感染对雏鸡脾脏miRNA表达谱的影响

基金项目: 云南省万人计划−产业技术领军人才(YNWR-CYJS-2019-020);国家蛋鸡产业技术体系(CARS-40-S25)。
详细信息
    作者简介:

    白潜(1996—),男,云南红河人,在读硕士研究生,主要从事禽病研究。E-mail:3114208967@qq.com

    通信作者:

    杨亮宇(1969—),男,云南大理人,博士,教授,主要从事禽病研究。E-mail:745863086@qq.com

    杨静(1993—),女,湖北武汉人,博士,讲师,主要从事人兽共患病的致病机理与防控技术研究。E-mail:17607193728@163.com

  • 中图分类号: S858.31

摘要:
目的鉴定感染鸡白痢沙门氏菌后雏鸡脾脏差异表达的miRNA,为阐明miRNA在鸡白痢沙门氏菌感染中的调控机制提供理论基础。
方法采集感染和未感染鸡白痢沙门氏菌的SPF雏鸡脾脏,提取脾脏RNA,构建6个miRNA文库;利用Illumina Hiseq 2500测序技术和生物信息学分析筛选差异表达miRNA,通过TargetScan和miRanda算法预测差异表达miRNA的靶基因,并进行GO功能富集和KEGG通路富集分析,最后利用RT-qPCR方法验证测序结果。
结果鉴定到29个差异表达miRNAs,其中15个显著上调、14个显著下调。GO分析表明:脂多糖介导的信号通路正调控以及NIK/NF-κB介导的信号通路负调控等免疫相关生物学过程显著富集;KEGG分析显示:差异表达的miRNA主要参与溶酶体和内吞作用等免疫相关通路。高通量测序结果与RT-qPCR结果一致。
结论成功鉴定到鸡白痢沙门氏菌感染雏鸡脾脏miRNA表达谱,获得29个鸡白痢沙门氏菌感染潜在相关miRNAs。

 

Effects of Salmonella Pullorum Infection on miRNA Expression Profiles in Spleen of Chicks

Abstract:
PurposeTo identify the differentially expressed miRNA in spleen of chicken infected with Salmonella Pullorum, providing a theoretical basis for clarifying the regulatory mechanism of miRNA in Salmonella Pullorum infection.
MethodsSpleens from SPF chicks infected and uninfected with Salmonella Pullorum were collected, spleen RNA was extracted, and six miRNA libraries were constructed. The differentially expressed miRNA were screened by Illumina Hiseq 2500 high-throughput sequencing technology and bioinformatics technology, the target genes were predicted by TargetScan and miRanda, and the predicted target genes were analyzed using GO functional enrichment and KEGG pathway enrichment. Finally, RT-qPCR was used to verify the sequencing results.
ResultsA total of 29 differentially expressed miRNAs were obtained, including 15 significantly up-regulated and 14 significantly down-regulated miRNAs. Immune-related biological processes such as positive regulation of lipopolysaccharide-mediated signaling pathways and negative regulation of NIK/NF-κB-mediated signaling pathways were significantly enriched in GO analysis. KEGG pathway enrichment showed that differentially expressed miRNA were mainly involved in immune-related pathways such as lysosome and endocytosis. In addition, the results of high-throughput sequencing were consistent with those of RT-qPCR.
ConclusionThe miRNA expression profile of chicks spleen infected with Salmonella Pullorum is successfully identified, and 29 potential miRNAs related to Salmonella Pullorum infection are obtained.

 

  • 在有光照、温度、氧气等条件都适宜的情况下,具有生理活力的种子能否萌发的决定因素是水分[1]。植物种子必须吸收足够的水分才能启动一系列酶的活动,由相对静止转为生理活动状态,呼吸作用开始增强,种子贮藏物质开始分解并转化,启动萌动状态;但不同植物种子吸水量不同,其吸水变化规律也不同。一般认为,含蛋白质较多的豆科种子吸水较多,而禾草类种子吸水较少。种子萌发时吸水量的差异是由种子所含成分不同引起的[2-3]

    植物种子在不同吸水环境下表现出不同的吸水速率及吸水能力[4]。SHAFAEI等[5]认为种子吸水能力其主要取决于浸种时间和水温,且水温提高加速水分扩散速度,导致种子吸水加快;RANJBARI等[6]发现随着浸种时间的延长,种子逐步吸收水分并最终趋向饱和。而对于种子吸水时间与种子吸水动态关系存在不同回归模型,如KASHANINEJAD等[7]发现水稻种子吸水与时间的最佳模型为Page模型;SHAFAEI等[8]发现鹰嘴豆种子吸水最佳模型为二项式函数;还有学者提出以经验模型应用最合适,即用试验得到的数据进行数理统计分析、按相关性最大归纳出该过程各参数和变量之间的数学关系式[9-11]

    对于不同作物种子萌发过程中的吸水规律已有较多报道[12-15]。然而,针对高羊茅种子的吸水规律及与形态特征相关性研究,国内外鲜见报道。本研究选择不同品种高羊茅种子进行控温下的吸水试验,并根据吸水时间和吸水率确定出种子的吸水模型,进一步探讨种子吸水量、吸水率和种子形态学特征之间的相关性,对高羊茅品种的选择具有一定的参考价值,为高羊茅种子发芽的水分管理提供理论基础。

    选取市场常见的7种高羊茅品种进行种子萌发吸水动态研究,即猎狗5号、黄金岛、勋章、宇宙星、家园、领域Ⅱ和交战Ⅱ。

    从7个高羊茅品种中选取籽粒大小基本一致的种子4 000粒,均匀摊铺在40 cm×30 cm的不锈钢盘中,置于25 m3密闭紫外线灭菌室消毒杀菌35 min。将每个品种的4 000粒种子在无菌操作台上分成4等份,即4个重复,每份分别称干重。称重后置入已用75%酒精消毒的有盖培养皿中,同时称取培养皿和1 000粒种子的总重量。

    采用游标卡尺测定高羊茅种子长度、厚度和宽度(最宽处),每个品种测量50粒,求平均值。种子千粒重采用电子天平称重法,利用亚甲蓝吸附法测定种子千粒表面积,排水法测定[16]种子千粒体积。

    每个品种随机选取1 000粒种子备用,分别取200粒种子用纱布包裹,4个重复,放入恒温水浴锅中进行浸泡试验,调控温度为30 ℃。试验期间的前6 h,每隔2 h取出种子;6 h后每隔3 h取出,用吸水纸将种子表皮的水分吸干、称重,直至42 h。然后计算不同高羊茅品种的吸水率[17-18]

    吸水率=(WhW0)/W0×100%,

    式中,Wh为种子湿重,W0为种子干重,h为吸水时间。

    对7个品种高羊茅种子的不同时间吸水率进行统计分析,并对不同高羊茅品种的吸水率与吸水时间的关系进行曲线估计。数据分析采用SPSS 13.0软件进行,用Excel作图。

    图1可知:不同品种高羊茅种子平均吸水率随吸水时间的延长而增加,种子吸水率从0增加到149.29%~153.70%,各品种的最终吸水量约为种子干重的1.5倍。参试高羊茅种子的吸水量都在39 h基本趋于饱和(水温30 ℃),同一时间各品种吸水率不存在差异(P>0.05)。高羊茅种子吸水率随吸水时间的延长而增加,呈现快—慢规律,并逐步趋于饱和,表现为第一阶段吸水速度较快(0~9 h),第二阶段吸水速度减慢(10~42 h)。综合各品种数值,吸水率增加值以9 h为最大(增加幅度为14.88%)。

    图  1  不同基因型高羊茅种子动态吸水特性
    Figure  1.  The dynamic absorption characteristics of tall fescue seed with different genotypes

    由吸水时间和吸水特性的散点图,不能确定何种函数模型更接近样本数据,故选择一元线性、对数函数、二次函数、三次函数、复合函数、幂函数、S形曲线、生长函数、指数函数、Logistic函数10种曲线进行拟合,最终确定具有R2统计量最大的三次函数模型作为最佳曲线回归模型。由表1可知:参试的高羊茅种子吸水率与吸水时间关系都是为三次函数,且二者显著相关,回归模型方程为高羊茅种子吸水量、吸水率提供数学预测,也为高羊茅种子发芽的水分管理提供理论基础。

    表  1  高羊茅种子吸水率(y)随吸水时间(x)变化的曲线估计 (三次函数)
    Table  1.  Curve estimate of seed water absorption rate (y) – time ( x) in F. arundinacea (cubic function)
    品种varieties 模型概括model summary 回归模型方程regression model
    R2 FF value 显著性 Sig.
    猎狗5号Hound V 0.936 43.538 0.000      y=0.007x3−0.421x2+10.356x+16.483
    黄金岛Golden Island 0.987 233.038 0.000      y=0.007x3−0.397x2+8.749x+15.089
    勋章Medal 0.977 130.023 0.000      y=0.005x3−0.273x2+6.792x+15.407
    宇宙星Cosmos 0.994 484.708 0.000      y=0.005x3−0.371x2+10.759x+22.821
    家园Home 0.980 148.795 0.000      y=0.004x3−0.272x2+6.584x+8.266
    领域Ⅱ FieldⅡ 0.971 100.154 0.000     y=0.008x3−0.503x2+10.875x+12.180
    交战Ⅱ Belligerent II 0.975 115.473 0.000     y=0.009x3−0.578x2+12.791x+15.697
    下载: 导出CSV 
    | 显示表格

    表2可知:参试7个高羊茅品种中,猎狗、黄金岛、领域Ⅱ的千粒重显著高于其他品种(P<0.05);粒长、粒宽、千粒表面积和千粒体积最大的均为勋章;粒厚之间无显著差异(P>0.05)。

    种子形态特征与种子吸水量、吸水率的相关性分析结果(表34)表明:高羊茅种子千粒重、粒长、粒宽、粒厚、千粒表面积和千粒体积与0~42 h内的吸水量呈极显著正相关,相关性大小顺序为千粒重>粒宽>千粒体积>千粒表面积>粒长>粒厚,这表明种子吸水量可以用上述指标来预测,以千粒重和粒宽为最好。高羊茅种子的粒宽、粒厚与0~42 h内的吸水率呈极显著负相关,相关性大小顺序为粒厚>粒宽,这表明高羊茅种子吸水率可以用粒厚和粒宽来预测,而其他形态特征与吸水率无显著相关。

    表  2  不同高羊茅品种的种子形态特征
    Table  2.  The seed morphological characters in F. arundinacea
    品种
    varieties
    千粒重/g
    1 000-seed weight
    粒长/mm
    seed length
    粒宽/mm
    seed width
    粒厚/mm
    seed thickness
    千粒表面积/cm2
    1 000-seed surface area
    千粒体积/cm3
    1 000-seed volume
    猎狗Hound 2.47±0.12 a 4.96±0.16 b 1.41±0.10 b 1.0±0.06 a 54.10±0.89 d 2.48±0.28 c
    黄金岛Golden Island 2.52±0.15 a 5.81±0.62 a 1.40±0.12 b 0.96±0.02 a 68.54±0.79 b 3.06±0.06 b
    勋章Medal 2.19±0.11 c 6.11±0.51 a 1.69±0.09 a 0.99±0.03 a 84.23±0.13 a 4.72±0.18 a
    宇宙星Cosmos 2.32±0.09 b 6.05±0.57 a 1.64±0.08 a 1.02±0.05 a 75.43±0.59 ab 4.22±0.08 a
    家园Home 2.18±0.10 c 5.22±0.58 b 1.41±0.13 b 0.94±0.06 a 60.14±1.29 c 2.61±0.07 c
    领域Ⅱ FieldⅡ 2.51±0.18 a 5.28±0.47 b 1.35±0.11 b 0.97±0.10 a 65.32±1.03 c 2.66±0.21 c
    交战Ⅱ Belligerent II 2.41±0.14 b 6.27±0.41 a 1.48±0.10 b 1.17±0.12 a 70.21±0.69 b 4.15±0.58 a
    注:同列不同字母表示0.05水平的显著性(P<0.05)。
    Note: Different letters in the same column indicate the 0.05 level of significance (P<0.05).
    下载: 导出CSV 
    | 显示表格
    表  3  高羊茅种子形态特征与种子吸水量的相关性
    Table  3.  Correlation between seed morphological characters and water absorption amounts of F. arundinacea
    处理时间/h
    treatment time
    千粒重/g
    1 000-seed weight
    粒长/mm
    seed length
    粒宽/mm
    seed width
    粒厚/mm
    seed thickness
    千粒表面积/cm2
    1 000-seed surface area
    千粒体积/cm3
    1 000-seed volume
    2 0.899** 0.592** 0.695** 0.615** 0.631** 0.616**
    4 0.886** 0.630** 0.667** 0.576* 0.644** 0.632**
    6 0.892** 0.661** 0.678** 0.594** 0.670** 0.659**
    9 0.892** 0.676** 0.682** 0.602** 0.681** 0.669**
    12 0.884** 0.688** 0.682** 0.600** 0.687** 0.673**
    15 0.883** 0.712** 0.691** 0.602** 0.705** 0.689**
    18 0.877** 0.713** 0.692** 0.596** 0.705** 0.690**
    21 0.875** 0.713** 0.689** 0.592** 0.703** 0.686**
    24 0.885** 0.716** 0.697** 0.593** 0.708** 0.693**
    27 0.915** 0.711** 0.712** 0.622** 0.710** 0.695**
    30 0.932** 0.721** 0.726** 0.647** 0.723** 0.706**
    33 0.937** 0.748** 0.744** 0.654** 0.750** 0.735**
    36 0.935** 0.757** 0.739** 0.646** 0.754** 0.739**
    39 0.932** 0.759 0.730** 0.642** 0.757** 0.742**
    42 0.930** 0.761 0.929** 0.639** 0.759** 0.744**
    注:*和**分别表示0.05和0.01水平的显著性;下同。
    Note: * and **indicates the significance of the 0.05 and 0.01 levels respectively; the same as below.
    下载: 导出CSV 
    | 显示表格
    表  4  高羊茅草坪种子形态特征与种子吸水率的相关性
    Table  4.  Correlation between seed morphological characters and water absorption ratio of F. arundinacea
    处理时间/h
    treatment time
    千粒重/g
    1 000-seed weight
    粒长/mm
    seed length
    粒宽/mm
    seed width
    粒厚/mm
    seed thickness
    千粒表面积/cm2
    1 000-seed surface area
    千粒体积/cm3
    1 000-seed volume
    2 −0.345 −0.478* −0.478* −0.562* −0.470* −0.426
    4 −0.380 −0.447 −0.513* −0.593** −0.457 −0.410
    6 −0.407 −0.448 −0.529* −0.594** −0.460 −0.412
    9 −0.435 −0.457 −0.546* −0.600** −0.471* −0.423
    12 −0.438 −0.445 −0.546* −0.603** −0.465 −0.419
    15 −0.439 −0.428 −0.543* −0.603** −0.454 −0.409
    18 −0.440 −0.426 −0.541* −0.604** −0.451 −0.407
    21 −0.437 −0.422 −0.539* −0.603** −0.449 −0.405
    24 −0.444 −0.432 −0.543* −0.604** −0.455 −0.409
    27 −0.421 −0.433 −0.531* −0.580* −0.450 −0.405
    30 −0.404 −0.422 −0.518* −0.561* −0.436 −0.391
    33 −0.420 −0.419 −0.523* −0.570* −0.433 −0.385
    36 −0.407 −0.402 −0.516* −0.566* −0.419 −0.371
    39 −0.421 −0.431 −0.523* −0.569* −0.427 −0.368
    42 −0.427 −0.412 −0.537* −0.572* −0.413 −0.369
    下载: 导出CSV 
    | 显示表格

    植物种子萌发过程中对水分的吸收量是长期适应环境的过程,探寻种子的吸水特性可以更好地了解其萌发特性。高羊茅种子的吸水率随吸水时间的延长而增加,各品种的高羊茅种子在39 h吸水基本趋于饱和(水温30 ℃),达到种子干重的1.5倍左右,说明参试高羊茅品种的种子吸水进程是一致的,不存在品种的区别,这与SHAFAEI等[5]研究不同大豆品种达到饱和吸水所用相同时间的结论是一致的。因此,39 h可作为高羊茅种子萌发吸水的关键时间。同一时间各品种高羊茅种子吸水率不存在差异(P>0.05),吸水率增加值随时间的延长先升后降,表现为9 h前升高和9 h后下降,因此,9 h可作为高羊茅种子吸水阶段的分界点,前9 h为种子快速吸水阶段,表现为较强吸水能力,平均每小时增加6.2%,9 h后高羊茅种子吸水强度降低,吸胀能力减弱,主要进行生理生化反应。小麦、高粱、水稻、花生等种子吸水的规律[19-22]也有相似的结论。此外,SHAFAEI等[5]认为后期种子吸水变慢其原因是后期种子内产生固体抑制物质有关,其具体的原因需要从种子微观结构及生理生化等进行进一步的研究。

    植物种子萌发吸水动态曲线常为典型“S”曲线,即吸水特性体现出“快—慢—快”规律[22-23]。但近年来的许多研究结果表明:植物种子萌发动态吸水拟合曲线是多样的,如鹰嘴豆种子动态吸水为二次函数[8]、玉米种子吸水特性为对数函数[24]等。本研究结果表明:高羊茅种子的动态吸水回归模型为三次函数,R2达到显著相关性(P<0.05),其拟合函数模型可以为高羊茅种子吸水机理研究奠定理论基础。高羊茅草坪草种子形态特征与0~42 h内的吸水量都呈极显著正相关,以千粒重和粒宽的相关性最大,高羊茅草坪草种子0~42 h吸水率与粒厚和粒宽呈显著负相关,其中与粒厚的相关性最大,这些结论与张冠初等[25]研究花生种子形态与种子吸水量、吸水率关系的结论一致。因此,在播种生产上,粒宽、千粒重大的高羊茅品种适当多灌溉,确保种子发芽水分的需要。当然,浸泡水温对高羊茅种子吸水影响及吸水量对种子发芽影响等问题有待于进一步研究。

  • 图  1   miRNA长度分布

    Figure  1.   Length distribution of miRNA

    图  2   差异表达miRNA的火山图

    Figure  2.   Volcano map of differentially expressed miRNA

    图  3   差异表达miRNA的聚类图

    Figure  3.   Hierarchical clustering of differentially expressed miRNA

    图  4   差异表达miRNA靶基因的GO功能

    Figure  4.   GO function of differentially expressed miRNA target genes

    图  5   差异表达靶基因的KEGG富集通路

    Figure  5.   KEGG pathways of differentially expressed miRNA target genes

    图  6   差异表达miRNA荧光定量验证

    注:RNA-seq. 高通量测序结果;RT-qPCR. 荧光定量结果。

    Figure  6.   Validation of the differentially expressed miRNA by RT-qPCR

    Note: RNA-seq. high throughput sequencing results; RT-qPCR. fluorescence quantitative results.

    表  1   miRNA RT-qPCR引物

    Table  1   Primers of miRNA RT-qPCR

    miRNA引物名称
    primer name
    引物序列 (5′→3′)
    primer sequence
    gga-let-7j-5p RTj5p GTCGTATCCAGTGCAGGGTCCGAGGTATTCGCACTGGATACGACAACTAT
    j5p-F GCGCGTGAGGTAGTAGGTTGT
    R1 AGTGCAGGGTCCGAGGTATT
    gga-miR-125b-3p
    RT125 GTCGTATCCAGTGCAGGGTCCGAGGTATTCGCACTGGATACGACAGGTCCCA
    125-F CCGCGACAAGTCAGGCTC
    R1 AGTGCAGGGTCCGAGGTATT
    gga-miR-130b-3p RT130 GTCGTATCCAGTGCAGGGTCCGAGGTATTCGCACTGGATACGACACGCCC
    130-F CGCGCAGTGCAATAATGAAA
    R1 AGTGCAGGGTCCGAGGTATT
    gga-let-7b RT7b GTCGTATCCAGTGCAGGGTCCGAGGTATTCGCACTGGATACGACAACCAC
    7b-F GCGCGTGAGGTAGTAGGTTGT
    R1 AGTGCAGGGTCCGAGGTATT
    gga-miR-451 RT451 GTCGTATCCAGTGCAGGGTCCGAGGTATTCGCACTGGATACGACAAACTC
    451-F CGCGAAACCGTTACCATTACT
    R1 AGTGCAGGGTCCGAGGTATT
    gga-miR-19b-3p RT19b GTCGTATCCAGTGCAGGGTCCGAGGTATTCGCACTGGATACGACTCAGTT
    19b-F CAGCGTGTGTGCAAATCCAT
    R1 AGTGCAGGGTCCGAGGTATT
    gga-miR-153-3p RT153 GTCGTATCCAGTGCAGGGTCCGAGGTATTCGCACTGGATACGACTCACTT
    153-F CCAGCGTGTTGCATAGTCAC
    R1 AGTGCAGGGTCCGAGGTATT
    gga-miR-21-3p RT21 CTCAACTGGTGTCGTGGAGTCGGCAATTCAGTTGAGGACAGC
    21-F CGCGCAACAACAGTCGGTAG
    R2 ACTGGTGTCGTGGAGTCGGC
    gga-miR-147 RT147 CTCAACTGGTGTCGTGGAGTCGGCAATTCAGTTGAGGCAGAA
    147-F GCGGTGTGCGGAAATGC
    R2 ACTGGTGTCGTGGAGTCGGC
    5S rRNA 5S-F CCATACCACCCTGGAAACGC
    5S-R TACTAACCGAGCCCGACCCT
    下载: 导出CSV

    表  2   有效数据统计结果

    Table  2   Statistical results of valid data

    样品
    samples
    原始序列
    raw reads
    筛选序列
    selected reads
    低质量序列
    junk reads
    过滤后序列
    clean reads
    Rfam数据库序列
    reads of Rfam database
    信使RNA
    mRNA
    重复序列
    repeats reads
    有效序列
    valid reads
    有效序列占比/%
    rate of valid reads
    C19380231498896998894381373844861229212321743337355235.96
    C2118840242433385122409438399852781158504387259848358971.39
    C3121814622560633125319608298962446177670390585852552069.99
    T12252988512411658102141010801344524922351372844813557361424.74
    T21137869151854186500618677321218511488411354775400600935.21
    T31143364852982732351061118651255664140035575972479096441.90
    下载: 导出CSV
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