NRF2 and p53 gene dysregulation, driven by oxidative stress and inflammation, linked to male infertility
Background
Male infertility is a complex condition often stemming from oxidative stress and apoptosis, processes influenced by hormonal and inflammatory pathways. Current diagnostic and therapeutic approaches often overlook the integrated molecular mechanisms. While NRF2 (nuclear factor erythroid 2-related factor 2) is a master regulator of antioxidant defense and p53 is a critical mediator of cell cycle arrest and apoptosis, their combined role in the etiology of male infertility has remained largely unexplored. Understanding this interplay could reveal novel diagnostic biomarkers and therapeutic targets.
Study Design
A case-control study was conducted on 300 males, comprising 150 infertile men and 150 fertile controls. Gene expression levels of NRF2 and p53 were quantified using RT-PCR. Concurrently, hormonal markers (FSH, testosterone, estradiol), inflammatory markers (IL-6), and biochemical markers (SOD, PSA) were measured via ELISA. Statistical analyses, including t-tests, ROC curves, scatter plots, and multiple regression, were employed to assess associations and predictive power between these markers and infertility status.
Results
Infertile men demonstrated significantly reduced NRF2 expression and superoxide dismutase (SOD) levels, alongside elevated FSH, estradiol, IL-6, PSA, and p53 expression. All these differences were statistically significant (p<0.001). ROC analysis identified FSH and NRF2 expression as strong predictors for male infertility. Multiple regression analysis further revealed that IL-6 and PSA were significant positive predictors of p53 expression, while SOD levels positively correlated with NRF2 expression. Scatterplots visually highlighted the contrasting associations of various biomarkers with NRF2 and p53 activity. This comprehensive analysis underscores a profound and integrated dysregulation of these key molecular pathways in infertile individuals.
Infertile men showed significantly reduced NRF2 expression and SOD levels, with elevated FSH, estradiol, IL-6, PSA, and p53 expression (p<0.001 for all markers).
Key Findings
- Infertile men exhibited significantly reduced NRF2 gene expression (p<0.001).
- Infertile men showed significantly elevated p53 gene expression (p<0.001).
- FSH and NRF2 expression were identified as strong predictors of male infertility.
- IL-6 and PSA positively predicted p53 expression, while SOD positively correlated with NRF2.
Why It Matters
This study provides compelling evidence that the combined dysregulation of NRF2 and p53 is a critical factor in male infertility, moving beyond single-factor explanations. Understanding these integrated pathways could lead to more precise diagnostic tools and targeted therapies. For clinicians, NRF2 and p53 gene expression, alongside FSH, could serve as novel diagnostic biomarkers, potentially improving early identification of men at risk. For future research, this work highlights the potential of modulating these pathways, perhaps through antioxidant or anti-inflammatory interventions, to restore fertility. This is a foundational step, and clinical translation into usable protocols will require extensive further research, including interventional studies.
male-infertility
nrf2
p53
oxidative-stress
inflammation
hormonal-dysregulation