Furthermore, testosterone supplementation along with exercise in patients with IBM led to an additional decrease in inflammatory response when compared to exercise alone . Preclinical models have demonstrated decreased adipose infiltration in DMD muscles and improved muscle function in female mice treated with oral selective AR modulators . Spinal and bulbar muscular atrophy (SBMA), also known as Kennedy disease, is an X-linked neuromuscular disease characterized by loss of lower motor neurons located in the brainstem and spinal cord. Some neuromuscular conditions exhibit a higher prevalence in men, suggesting a potential pathological role of sex hormones . Androgens additionally inhibit pathways involved in homocysteine metabolism, and exogenous use can result in elevated homocysteine levels. Supraphysiologic TRT use is being evaluated as a risk factor when evaluating young patients with Embolic Stroke of Undetermined Source (ESUS) . The American Urological Association and Endocrine Society recommends TRT use only for management of symptomatic hypogonadism in men 14, 15. In 2006, a Canadian study reported that total and bioavailable testosterone were significantly lower in middle-aged depressed men (40–65 years) who had considerably higher BDI and Hamilton depression scores than men enrolled in the Rancho Bernardo Study . Several studies have shown that certain chronic medical disorders, especially type 2 diabetes, may be more important in promoting testosterone decline than increasing age 2, 16, 19, 20. Although most studies on testosterone decline during aging have involved older men, a recent longitudinal study of young, healthy men (average age 34) found that the age at baseline did not predict changes in the trajectories of testosterone, dihydrotestosterone, androstenedione, and estradiol measured by LC–MS/MS mass spectrometry over a twelve-year period . Other cross-sectional research found that free testosterone levels decreased more rapidly at a rate of 1.5–2.0% in older men due to the age-dependent upregulation of SHBG . Other men, however, experience a substantial age-related decline in total testosterone into the clinical hypogonadal range below 280–300 ng/dl (9.7–10.4 nmol/L SI units). D-Aspartic Acid is an amino acid that plays a crucial role in the production and release of hormones in the body. These ingredients work synergistically to support the body’s natural testosterone production. Prime Male, a popular testosterone booster, contains all of these ingredients, along with others like Korean red ginseng, luteolin, and nettle root. These supplements contain ingredients that support the body’s natural testosterone production. The SNS and testosterone are intricately linked, with each influencing the other in a complex interplay. Furthermore, it can inform the use of interventions, such as testosterone boosters, to potentially enhance physical performance and stress resilience. Androgen receptor expression has been found to be decreased by 2.7-fold in hypothalamus of men with major depressive disorder compared to male controls . Testosterone and DHT binding to the ligand binding domain stimulates the androgen receptor protein to assume an active conformation. The androgen receptor protein consists of a transcriptional regulation domain at the N-terminus that activates or represses target genes, the highly conserved DNA binding domain with two zinc fingers that bind promoter or enhancer DNA consensus sequences of target genes, a small hinge region, and a ligand binding domain at the C-terminus 88, 89. Furthermore, meta-analyses have shown that TRT has a more consistent antidepressant effect in men with less severe, subclinical depression 20, 75, 78, 79, 87. It is important to note that the Testosterone Trials found that TRT improved mood and decreased depressive symptoms in hypogonadal men. This includes ongoing research exploring the potential therapeutic targets involving the androgen signaling pathway for management of neurological disorders. Despite the above findings, there is no established indication of TRT or androgen-blocking medication in neurological disorders. Additionally, androgen-blocking agents could increase the risk of neurodegenerative conditions, such as Parkinson disease and Alzheimer disease. On the other hand, androgen-blocking treatments may help alter disease progression in spinal and bulbar muscular atrophy. Although limited to experimental use, testosterone replacement therapy (TRT) may serve potential benefits in the management of multiple sclerosis, epilepsy, headache, Duchenne muscular dystrophy, amyotrophic lateral sclerosis, and Parkinson disease. This interplay between testosterone and the SNS could have significant implications for how individuals respond to stress and engage in risk-taking behaviors. However, there are no guidelines advocating the use of TRT in men with hypogonadism for stroke prevention. Testosterone at therapeutic level leads to protective effects against ischemic stroke and cardiovascular events. The higher incidence of ischemic stroke in men, especially with hypogonadism, as well as in post-menopausal women suggests involvement of sex hormones in the pathogenesis of ischemic stroke. Additionally, it has been shown to increase neurogenic output of excitatory progenitors in human brain organoids 10–12. Neuroplasticity is the ability of the brain to adapt in response to stimuli and is of distinct interest in stroke rehabilitation and cognitive recovery . Elevations in prenatal testosterone have additionally demonstrated an inverse relationship with the development of pathways responsible for social communication and cognition 6, 7. ARs are also found in the dorsal horn of the spinal cord and various brain stem locations, predominating in the area postrema, motor nucleus of the vagus nerve, dorsal raphe nucleus, periaqueductal gray, retrorubral nucleus, retrotrapezoid nucleus, and substantia nigra.
