Androgen Receptor Gene Variants and PFS Symptoms
Living with PFS and wondering why symptoms differ between people? What one small study of the androgen receptor gene found.
Can your genes shape which post-finasteride syndrome (PFS) symptoms you have? One study of 66 men suggests they may. The length of repeated stretches in the androgen receptor (AR) gene was linked to differences in sex drive, orgasm, skin dryness and muscle spasms.
PFS is the name for lasting side effects in men who have used finasteride, mostly for hair loss (androgenic alopecia).
What did the researchers look at, and what did they find?
The Role of Androgen Receptor (AR) Gene Polymorphisms
Finasteride functions by inhibiting the enzyme 5α-reductase, which is responsible for converting testosterone into its more potent form, dihydrotestosterone (DHT). However, some individuals experience persistent adverse effects after discontinuing finasteride. This study investigates two specific polymorphisms in the AR gene, denoted as (CAG)n and (GGN)n, to determine their association with the symptoms reported by PFS patients.
Study Overview and Methodology
The study analyzed AR gene polymorphisms in 66 white male participants, including individuals from Italy, the United States, and other countries. The participants were assessed using three different questionnaires: the Arizona Sexual Experience Scale (ASEX), the Aging Male Symptom Scale (AMS), and a 100-item ad hoc questionnaire specifically designed for this study.
The (CAG)n and (GGN)n repeats in the AR gene were categorized as short, medium, or long. The researchers then examined the correlation between these repeat lengths and the symptoms reported by the participants.
Key Findings
The study revealed several important findings related to the AR gene polymorphisms:
- Sexual Dysfunction: Participants with short (CAG)9-19 repeats experienced a greater decrease in sexual desire and libido compared to those with medium repeats. Long (CAG)25-37 repeats were associated with worse orgasm satisfaction.
- Skin Dryness: The study identified a U-shaped curve in skin dryness symptoms, with both short and long (CAG)n repeats associated with higher frequencies of skin dryness compared to medium repeats.
- Scrotal Discomfort and Muscle Spasms: Scrotal discomfort was less common in participants with short (CAG)9-19 repeats, while involuntary muscle spasms were more frequent in those with long (CAG)25-37 repeats.
Implications for Understanding PFS
The findings suggest that the length of (CAG)n and (GGN)n repeats in the AR gene may influence the severity and type of symptoms experienced by PFS patients. This study provides valuable insights into the complex genetic factors that may contribute to PFS and highlights the need for further research in this area.
Conclusion
This study represents an important step in understanding the genetic underpinnings of PFS. By identifying specific genetic variations associated with symptoms, researchers can better understand the mechanisms behind PFS and potentially develop targeted therapies to alleviate the condition.
For more detailed information, you can read the original study: Androgen Receptor (AR) Gene (CAG)n and (GGN)n Length Polymorphisms and Symptoms in Young Males With Long-Lasting Adverse Effects After Finasteride Use Against Androgenic Alopecia.
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