Planned studies during pregnancy
Vani Vannappagari, MBBS, MPH, PhD, global head of epidemiology and real-world evidence at ViiV Healthcare and study coauthor, said in an interview that the initial results are spurring promising new research.
“We are working with an external IMPAACT [International Maternal Pediatric Adolescent AIDS Clinical Trials Network] group on a clinical trial ... to try to determine the appropriate dose of long-acting cabotegravir-rilpivirine during pregnancy,” Dr. Vannappagari said. “The clinical trial will give us the immediate safety, dose information, and viral suppression rates for both the mother and the infant. But long-term safety, especially birth defects and any adverse pregnancy and neonatal outcomes, will come from our antiretroviral pregnancy registry and other noninterventional studies.
“In the very small cohort studied, [in] pregnancies that were continued after exposure to long-acting cabotegravir and rilpivirine in the first trimester, there were no significant adverse fetal outcomes identified,” he said. “That’s reassuring, as is the fact that at the time these patients were switched in early pregnancy, their viral loads were all undetectable at the time that their pregnancies were diagnosed.”
Neil Silverman, MD, professor of clinical obstetrics and gynecology and director of the Infections in Pregnancy Program at the University of California, Los Angeles, Medical Center, who was not associated with the study, provided a comment to this news organization.
“The larger question still remains why pregnant women were so actively excluded from the original study design when this trial was evaluating a newer long-acting preparation of two anti-HIV medications that otherwise would be perfectly fine to use during pregnancy?”
Dr. Silverman continued, “In this case, it’s particularly frustrating since the present study was simply evaluating established medications currently being used to manage HIV infection, but in a newer longer-acting mode of administration by an injection every 2 months. If a patient had already been successfully managed on an oral antiviral regimen containing an integrase inhibitor and a non-nucleoside reverse transcriptase inhibitor, like the two drugs studied here, it would not be considered reasonable to switch that regimen simply because she was found to be pregnant.”
Dr. Patel and Dr. Vannappagari are employees of ViiV Healthcare and stockholders of GlaxoSmithKline.
This analysis was funded by ViiV Healthcare, and all studies were cofunded by ViiV Healthcare and Janssen Research & Development. Dr. Silverman reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.