Drug used to prevent miscarriage increases risk of cancer in offspring


Date:
November 9, 2021
Source:
University of Texas Health Science Center at Houston
Summary:
Exposure in utero to a drug used to prevent miscarriage can lead
to an increased risk of developing cancer, according to researchers.



FULL STORY ========================================================================== Exposure in utero to a drug used to prevent miscarriage can lead to an increased risk of developing cancer, according to researchers at The
University of Texas Health Science Center at Houston (UTHealth Houston).


==========================================================================
The study was published today in the American Journal of Obstetrics
and Gynecology.

The drug, 17a-hydroxyprogesterone caproate (17-OHPC), is a synthetic progestogen that was frequently used by women in the 1950s and
1960s, and is still prescribed to women today to help prevent preterm
birth. Progesterone helps the womb grow during pregnancy and prevents
a woman from having early contractions that may lead to miscarriage.

"Children who were born to women who received the drug during pregnancy
have double the rate of cancer across their lifetime compared to children
born to women who did not take this drug," said Caitlin C. Murphy, PhD,
MPH, lead author on the study and associate professor in the Department
of Health Promotion and Behavioral Sciences at UTHealth School of
Public Health in Houston. "We have seen cancers like colorectal cancer, pancreatic cancer, thyroid cancer, and many others increasing in people
born in and after the 1960s, and no one really knows why." Researchers reviewed data from the Kaiser Foundation Health Plan on women who received prenatal care between June 1959 and June 1967, and the California Cancer Registry, which traced cancer in offspring through 2019.

Out of more than 18,751 live births, researchers discovered 1,008 cancer diagnoses were made in offspring ages 0 to 58 years. Additionally, a
total of 234 offspring were exposed to 17-OHPC during pregnancy. Offspring exposed in the womb had cancer detected in adulthood more than twice as
often as offspring not exposed to the drug -- 65% of cancers occurred
in adults younger than 50.

"Our findings suggest taking this drug during pregnancy can disrupt early development, which may increase risk of cancer decades later," Murphy said "With this drug, we are seeing the effects of a synthetic hormone. Things
that happened to us in the womb, or exposures in utero, are important
risk factors for developing cancer many decades after we're born."
A new randomized trial shows there is no benefit of taking 17-OHPC, and
that it does not reduce the risk of preterm birth, according to Murphy.

The U.S. Food and Drug Administration proposed in October 2020 that this particular drug be withdrawn from the market.

This work was supported by two National Institutes of Health: The National Cancer Institute (R01CA242558) and the National Institute of Child Health
and Development (HHSN275201100020C).

Additional authors include Piera M. Cirillo, MPH; Nickilou Y. Krigbaum,
MPH; and Barbara A. Cohn, PhD, all with Child Health and Development
Studies at the Public Health Institute.

========================================================================== Story Source: Materials provided by University_of_Texas_Health_Science_Center_at_Houston.

Original written by Jeannette Sanchez. Note: Content may be edited for
style and length.


========================================================================== Journal Reference:
1. Caitlin C. Murphy, Piera M. Cirillo, Nickilou Y. Krigbaum,
Barbara A.

Cohn. In utero exposure to 17a-hydroxyprogesterone caproate and
risk of cancer in offspring. American Journal of Obstetrics and
Gynecology, 2021; DOI: 10.1016/j.ajog.2021.10.035 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2021/11/211109120334.htm

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