Pituitary-testicular axis dysfunction in spinal cord injury

Area of Science:

• Endocrinology
• Neuroscience
• Urology

Background:

• Spinal cord injury (SCI) can disrupt hormonal balance.
• The hypothalamic-pituitary-gonadal (HPG) axis is crucial for reproductive health and hormone regulation.

Purpose of the Study:

• To investigate the impact of spinal cord injury on serum hormone levels (testosterone, LH, FSH) and urinary 17-ketosteroids.
• To compare hormonal changes in paraplegic versus quadriplegic individuals post-injury.

Main Methods:

• Serum and urine samples were collected weekly for 4 months from newly injured paraplegic and quadriplegic subjects.
• Hormone concentrations were compared to age-matched healthy controls.
• Chronic SCI patients (1-6 years post-injury) were also assessed.

Main Results:

• Paraplegic subjects showed transient decreases in LH, FSH, and testosterone post-injury, with levels normalizing within weeks.
• Quadriplegic subjects exhibited significantly lower serum testosterone throughout the 4-month study period.
• Chronic quadriplegic subjects had depressed serum LH levels compared to controls.

Conclusions:

• Quadriplegia leads to a prolonged disruption of the hypothalamic-pituitary-gonadal axis.
• The severity and duration of hormonal disturbances differ between paraplegia and quadriplegia.
• Urinary 17-ketosteroid levels fluctuated and were generally lower in paraplegic subjects.