Cell Stress and Chaperones

, Volume 23, Issue 4, pp 663–672 | Cite as

Genome-wide microRNA profiling of bovine milk-derived exosomes infected with Staphylococcus aureus

  • Mingcheng Cai
  • Hongbing He
  • Xianbo Jia
  • Shiyi Chen
  • Jie Wang
  • Yu Shi
  • Buwei Liu
  • Wudian Xiao
  • Songjia LaiEmail author
Original Article


Bovine milk is rich in exosomes, which contain abundant miRNAs and play important roles in the regulation of neonatal growth and development of adaptive immunity. Here, we analyzed miRNA expression profiles of bovine milk exosomes from three healthy and three mastitic cows, and then six miRNA libraries were constructed. Interestingly, we detected no scRNAs and few snRNAs in milk exosomes; this result indicated a potential preference for RNA packaging in milk exosomes. A total of 492 known and 980 novel exosomal miRNAs were detected, and the 10 most expressed miRNAs in the six samples accounted for 80–90% of total miRNA-associated reads. Expression analyses identified 18 miRNAs with significantly different expression between healthy and infected animals; the predicted target genes of differentially expressed miRNAs were significantly enriched in immune system process, response to stimulus, growth, etc. Moreover, target genes were significantly enriched in several Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways including inflammatory, immune, and cancer pathways. Our survey provided comprehensive information about milk exosomes and exosomal miRNAs involved in mastitis. Moreover, the differentially expressed miRNAs, especially miR-223 and miR-142-5p, could be considered as potential candidates for mastitis.


Bovine Milk Exosome Mastitis miRNA-sequencing 


Author contributions

SJL and MCC contributed to concept design. HBH and WDX performed the animal experiments. MCC, BWL, and YS performed the RNA and protein isolation and western blot. MCC, HBH, and XBJ performed data analysis. MCC, SYC, and JW prepared the manuscript. All authors read and approved the final manuscript.

Funding information

This research was supported by the Science and Technology Support Program in Sichuan (No. 2014NZ0032-A).

Compliance with ethical standards

All experiments were carried out according to the Regulations for the Administration of Affairs Concerning Experimental Animals published by the Ministry of Science and Technology, China in 2004 and approved by the Institutional Animal Care and Use Committee of Sichuan Agricultural University, China.

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

12192_2018_876_MOESM1_ESM.ppt (442 kb)
Fig S1. Distribution and classification of small RNA reads in the HH and HM. (PPT 442 kb)
12192_2018_876_MOESM2_ESM.ppt (159 kb)
Fig S2. Comparison of the results of miRNA-sequencing and qRT-PCR. (PPT 159 kb)
12192_2018_876_MOESM3_ESM.xlsx (10 kb)
Table S1. The SCC of six Holstein cows. (XLSX 9 kb)
12192_2018_876_MOESM4_ESM.xlsx (10 kb)
Table S2. Primer sequences for qRT-PCR. (XLSX 10 kb)
12192_2018_876_MOESM5_ESM.xlsx (10 kb)
Table S3. The length and expression of miRNAs. (XLSX 10 kb)
12192_2018_876_MOESM6_ESM.xlsx (70 kb)
Table S4. The read counts and miRNA family analysis of novel miRNAs (XLSX 69 kb)
12192_2018_876_MOESM7_ESM.xlsx (13 kb)
Table S5. The expression of differentially expressed miRNAs. (XLSX 12 kb)
12192_2018_876_MOESM8_ESM.xlsx (10 kb)
Table S6. KEGG pathways of the target genes. (XLSX 10 kb)


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Copyright information

© Cell Stress Society International 2018

Authors and Affiliations

  • Mingcheng Cai
    • 1
  • Hongbing He
    • 1
  • Xianbo Jia
    • 1
  • Shiyi Chen
    • 1
  • Jie Wang
    • 1
  • Yu Shi
    • 1
  • Buwei Liu
    • 1
  • Wudian Xiao
    • 1
  • Songjia Lai
    • 1
    Email author
  1. 1.Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan ProvinceSichuan Agricultural UniversityChengduChina

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