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Updated: May 23, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
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No difference in 5-HTTLPR and Stin2 polymorphisms frequency between premature ejaculation patients and controls.

Daniela Zuccarello1, Marco Ghezzi, Manuel Pengo

  • 1Department of Histology, Microbiology and Medical Biotechnologies, Section of Clinical Pathology and Centre for Male Gamete Cryopreservation, University of Padova, Padova, Italy.

The Journal of Sexual Medicine
|April 12, 2012
PubMed
Summary

Genetic variations in the serotonin transporter gene (SLC6A4) are not linked to premature ejaculation (PE). This study found no significant differences in SLC6A4 polymorphisms between PE patients and controls.

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Area of Science:

  • Genetics
  • Neuroscience
  • Urology

Background:

  • Premature ejaculation (PE) is a common male sexual dysfunction with complex neurobiological underpinnings.
  • The serotoninergic (5-hydroxytryptamine [5-HT]) system, particularly the 5-HT transporter (5-HTT or SERT) encoded by the SLC6A4 gene, is implicated in ejaculation control.
  • Genetic polymorphisms in SLC6A4 have been inconsistently associated with PE pathogenesis and treatment response.

Purpose of the Study:

  • To investigate the potential pathogenetic link between PE and specific SLC6A4 gene polymorphisms.
  • To analyze the 5-HTT-linked polymorphic region (5-HTTLPR), rs25531, and STin2 polymorphisms in patients with lifelong and acquired PE.

Main Methods:

  • Utilized polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) analysis to genotype SLC6A4 polymorphisms.
  • Diagnosed PE by measuring intravaginal ejaculatory latency time using a stopwatch.
  • Compared genotype frequencies of SLC6A4 polymorphisms between PE patients and a control group.

Main Results:

  • Genotype frequencies for all analyzed SLC6A4 polymorphisms (5-HTTLPR, rs25531, STin2) were in Hardy-Weinberg equilibrium in both patients and controls.
  • No statistically significant differences were observed in the frequencies of SLC6A4 polymorphisms between PE patients and controls.
  • No significant differences were found when comparing lifelong PE, acquired PE, or lifelong PE versus acquired PE patients to controls.

Conclusions:

  • The study findings indicate no association between SLC6A4 gene polymorphisms and premature ejaculation.
  • Results contradict some previous reports, highlighting the need for further research in this area.
  • The frequency of SLC6A4 polymorphisms does not differ between individuals with PE and healthy controls.