Premature adrenarche differs from central puberty in that it does not involve activation of which axis?

Premature adrenarche differs from central puberty in that it does not involve activation of which axis?

• A. Hypothalamic-pituitary-gonadal axis
• B. Hypothalamic-pituitary-adrenal axis
• C. Sympathetic-adrenal-medullary axis
• D. Renin-angiotensin-aldosterone axis

Answer: (A)

Premature adrenarche is driven by early maturation of the adrenal glands, leading to increased adrenal androgens (like DHEA and DHEA-S) and features such as early pubic/axillary hair and body odor. This process does not involve activation of the gonadal axis. In contrast, central puberty (gonadarche) requires activation of the hypothalamic-pituitary-gonadal axis, with GnRH pulses prompting LH/FSH release and gonadal production of sex steroids that drive breast development or testicular enlargement. Therefore, the axis that is not activated in premature adrenarche is the hypothalamic-pituitary-gonadal axis.

Premature adrenarche is driven by early maturation of the adrenal glands, leading to increased adrenal androgens (like DHEA and DHEA-S) and features such as early pubic/axillary hair and body odor. This process does not involve activation of the gonadal axis. In contrast, central puberty (gonadarche) requires activation of the hypothalamic-pituitary-gonadal axis, with GnRH pulses prompting LH/FSH release and gonadal production of sex steroids that drive breast development or testicular enlargement. Therefore, the axis that is not activated in premature adrenarche is the hypothalamic-pituitary-gonadal axis.