Identification and functional prediction of ceRNA networks regulating ATP levels in boar spermatozoa treated with non-thermal plasma.

Adenosine triphosphate (ATP) is essential for sperm motility. We previously found that optimized non-thermal dielectric barrier discharge (DBD) plasma treatment enhanced boar sperm quality by increasing ATP levels. However, the molecular mechanisms underlying this process, particularly the role of competing endogenous RNA (ceRNA) networks, remain unclear. In this study, a total of 266 mRNAs, 163 miRNAs, and 37 circRNAs were identified as differentially expressed in boar spermatozoa treated with optimized DBD plasma. Functional enrichment analysis revealed that ATP-related pathways, including AMPK, mTOR, and cAMP signaling, were significantly enriched. A circRNA-miRNA-mRNA regulatory network was constructed, and two key ceRNA axes, circRNA7761-miR-7-3p-TECRL/CYP24A1/LOC100515741 and circRNA7508-miR-202-5p-CYP2A19/HHIP/WNT2, were identified in the network. These axes are predicted to enhance ATP production by regulating mitochondrial function and energy homeostasis, thereby improving sperm quality. This study provides novel mechanistic insights into the modulation of sperm energy metabolism by DBD plasma through ceRNA networks, thereby offering new theoretical foundations and potential molecular targets for improving male fertility and treating male infertility.