Androgen deprivation therapy (ADT), often used to treat prostate cancer, is linked with greater risk of metabolic syndrome, which includes metabolic conditions like obesity, insulin resistance, hypertension, and dyslipidemia. However, it’s not clear how combining ADT with androgen receptor pathway inhibitors (ARPIs), a newer treatment also used for prostate cancer, changes this risk.
Understanding how ARPIs influence outcomes is especially important now that the therapy is increasingly used in patients with earlier stages of prostate cancer. “That means there are going to be a lot more patients who are exposed to this therapy for much, much longer periods,” says Grace Lu-Yao, PhD, MPH, a professor in Thomas Jefferson University’s Department of Medical Oncology.
A recent study, led by Amy L. Shaver, PhD, PharmD, MPH, a researcher in Thomas Jefferson University’s Department of Pharmacology, Physiology, and Cancer Biology, measured the timing and occurrence of metabolic syndrome in patients receiving ADT-ARPI who had no signs of the condition prior to treatment. Patients were followed for 12 months after starting concurrent ADT and ARPI treatment and were classified as having metabolic syndrome if they developed at least three of its component conditions or received a physician diagnosis of metabolic syndrome.
Results showed that nearly 40% of participants developed metabolic syndrome, with a median time of 2.6 months to onset. This indicates that metabolic syndrome is both very common in patients taking ADT-ARPI and develops rapidly after initiating treatment.
These findings suggest that patients receiving ADT-ARPI should be actively monitored for metabolic dysfunction. “When a person is being treated for cancer, the treatment for their cancer is critical, but we need to remember that there are other conditions that that person is dealing with,” says Dr. Shaver. “Holistic care and having a unified healthcare team involving the patient is important.” For example, a dietitian or endocrinologist could be included to monitor for changes to cardiometabolic health.
Dr. Shaver plans to conduct a follow-up study that includes a comparison group of patients receiving ADT without an ARPI. “I'd like to better understand the specific contribution of ARPIs to metabolic dysfunction and identify interventions that could best serve these patients,” she says.
By Zoe Cunniffe