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[The miR-184 level in the seminal plasma exosome of male infertility patients and its clinical significance].

Zhonghua Nan Ke Xue. 2020 Aug;26(8):686-694
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摘要


OBJECTIVE:To study the miR-184 level in the seminal plasma exosome of male infertility patients and its clinical significance. METHODS:Between 2015 and 2019, we collected 285 seminal plasma samples from 97 azoospermia (AS) and 96 asthenospermia (AZS) patients and 92 age-matched normal fertile controls in Jiangsu Provincial Hospital of Traditional Chinese Medicine, General Hospital of Eastern Theater Command and the First Hospital Affiliated to Wenzhou Medical University, identified the isolated seminal plasma exosomes by nanoparticle tracking analysis (NTA), transmission electron microscopy (TEM) and Western blot, and detected the miR-184 level in the seminal plasma exosomes by quantitative real-time PCR (qRT-PCR). We determined the clinical value of the miR-184 level and its correlation with semen parameters by multiple statistics, predicted the target genes and involved pathways of miR-184 by bioinformatic algorithms, and analyzed their relationship with male infertility. RESULTS:NTA, TEM and Western blot exhibited plenty of exosomes in the seminal plasma of the patients. The results of qRT-PCR showed that the miR-184 level in the seminal plasma exosome was dramatically decreased in the AS patients compared with that in the normal fertile controls (0.227 [0.092, 0.790] vs 0.650 [0.408, 1.061], P < 0.01), but increased in AZS males in comparison with that in the control group (1.176 [0.661, 1.946] vs 0.650 [0.408, 1.061], P < 0.01). The areas under the ROC curve (AUC) for differentiating the AS and AZS patients from the controls were 0.866 (95% CI: 0.815-0.916) and 0.724 (95% CI: 0.653-0.795), respectively, and that for differentiating the AS from the AZS group was 0.964 (95% CI: 0.943-0.985). The miR-184 level in the seminal plasma exosome of the AZS patients was correlated positively with the sperm count (r = 0.243, P = 0.017) but negatively with the percentage of progressively motile sperm (r = -0.407, P = 0.006). Bioinformatics analysis indicated that the downstream target genes of miR-184 were significantly enriched in the protein regulatory pathways closely related to male reproduction and spermatogenesis. CONCLUSIONS:The miR-184 level in the seminal plasma exosome of infertility patients is significantly different from that of normal fertile males, which may serve as a potential auxiliary marker for the diagnosis of and participate in the development and progression of male infertility.

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