Groundbreaking Nature Study Links Male Hormones to Growth of Lethal and Previously Untreatable Pediatric Brain Tumors

New research in Nature links androgens to the growth of PFA ependymoma, revealing why boys are more vulnerable and suggesting anti-androgen therapy as a cure.

By: AXL Media

Published: Mar 26, 2026, 8:57 AM EDT

Source: Information for this report was sourced from Baylor College of Medicine

Decoding the Mystery of Sex Disparities in Pediatric Oncology

For years, clinicians have observed that boys are significantly more vulnerable to Posterior Fossa Type A (PFA) ependymoma than girls, often facing lower survival rates. Despite this known disparity, the underlying biological mechanism remained a mystery due to the tumor's lack of clear genetic drivers. A new study published in the journal Nature has finally provided an answer, pointing to androgens—commonly known as male hormones—as the specific fuel for this lethal cancer. Researchers from Baylor College of Medicine and Texas Children's Hospital shifted their focus from genetics to hormonal influences, discovering that sex specific factors are the primary engine for tumor progression in male patients.

Hormonal Influence on Cellular Maturation and Proliferation

The research team found that PFA ependymoma cells in male patients exist in a significantly less developed state compared to those found in females. This developmental delay is directly driven by androgen activity, which effectively traps the tumor cells in a growth prone, immature phase. Dr. Jiao Zhang, assistant professor at Baylor, noted that while female brain cells typically advance further in their development at the same embryonic stage, the presence of male hormones in boys prevents this maturation. By keeping the cells "young" and unspecialized, androgens allow the cancer to proliferate more aggressively, explaining the increased susceptibility observed in male infants and children.

Isolating Hormones Over Chromosomal Factors

To determine the exact cause of the sex disparity, the international team utilized animal models and laboratory grown cancer cells to test several variables. They investigated whether the growth was influenced by sex chromosomes—XX for females versus XY for males—or by specific hormones like estradiol, progesterone, and androgens. The results were definitive: chromosomal factors played no measurable role in tumor acceleration, and female sex hormones did not alter cell growth compared to control groups. Only the introduction of androgens was shown to promote tumor expansion and reinforce the primitive, dangerous properties of the PFA ependymoma cells.