Efficiency of microsurgical subinguinal varicocelectomy in patients with increased level of sperm DNA fragmentation

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Aim. To evaluate the effect of microsurgical subinguinal varicocelectomy on sperm DNA fragmentation (SDF) in patients with elevated SDF levels (more than 15%) and clinical varicocele.

Materials and methods. A single-center, retrospective, observational, uncontrolled study was carried out. The results of a survey of 33 patients with clinical varicocele, infertility or recurrent miscarriage and sperm DNA fragmentation of more than 15% were analyzed. All patients in 2021–2022 underwent microsurgical subinguinal varicocelectomy at the clinic «Mother and Child Yaroslavl». The level of sperm DNA fragmentation was assessed before and 3 months after varicocelectomy using TUNEL assay based on flow cytometry.

Results. The level of SDF before surgery ranged from 17 to 73% (Me [Q1–Q3]: 32% [21–42]). After 3 months, it ranged from 1 to 27% (14,4% [7,5–17,4]). The differences between the groups were significant (p <0.001). In all patients, SDF levels after varicocelectomy were lower compared to baseline. The differences ranged from 4 to 55% (19,1% [9,5–25,7]). In 21 patients (63.6%) SDF level after treatment did not exceed the upper limit of the reference interval (15%), and in 11 (35.4%) patients the postoperative values were higher than 15%. A significant (p<0.001) positive correlation (r=0.626) was revealed between the preoperative SDF level and the degree of reduction in sperm DNA fragmentation. However, no correlation was found with other preoperative indicators (varicocele degree, patient age, body mass index, side of varicocele).

Conclusion. Performing microsurgical subinguinal varicocelectomy in patients with an increased SDF level (more than 15%) allows reducing SDF within 3 months by an average of 19.1% and achieving normative values in 63.6% of men. The degree of reduction in SDF after varicocelectomy positively correlates with preoperative values.

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作者简介

A. Ryzhkov

FGBU VO «Yaroslavl State Medical University» of the Ministry of Healthcare of the Russian Federation; LLC «Mother and Child Yaroslavl»

编辑信件的主要联系方式.
Email: 1129682@gmail.com
ORCID iD: 0000-0001-7919-9830

Ph.D., associate professor of the Department of Urology and Nephrology of FGBU VO «Yaroslavl State Medical University», urologist at the LLC «Mother and Child Yaroslavl»

俄罗斯联邦, Yaroslavl; Yaroslavl

S. Sokolova

LLC «Mother and Child Yaroslavl»

Email: ntvbyfntnrf@mail.ru
ORCID iD: 0000-0002-3673-0713

urologist 

俄罗斯联邦, Yaroslavl

I. Shormanov

FGBU VO «Yaroslavl State Medical University» of the Ministry of Healthcare of the Russian Federation

Email: i-s-shormanov@yandex.ru
ORCID iD: 0000-0002-2062-0421

Ph.D., MD, professor, Head of the Department of Urology and Nephrology 

俄罗斯联邦, Yaroslavl

参考

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2. Fig. 1. FDS level before surgery and 3 months after surgery

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3. Fig. 2. Difference in pre- and postoperative values ​​of sperm DNA fragmentation

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4. Fig. 3. The number of patients with FDS values ​​up to 15%, 15-30% and more than 30% and after surgery

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5. Fig. 4. Correlation of preoperative FDS values ​​with the difference between pre- and postoperative FDS values

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