Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Anti-HIV drug use during pregnancy does not affect infant size, birth weight

02.05.2012
NIH study indicates drug safe during pregnancy, but infants smaller at first birthday

Infants born to women who used the anti-HIV drug tenofovir as part of an anti-HIV drug regimen during pregnancy do not weigh less at birth and are not of shorter length than infants born to women who used anti-HIV drug regimens that do not include tenofovir during pregnancy, according to findings from a National Institutes of Health network study.

However, at 1 year of age, children born to the tenofovir-treated mothers were slightly shorter and had slightly smaller head circumference—about 1 centimeter each, on average—than were infants whose mothers did not take tenofovir.

The study authors described the findings as reassuring, noting that the study did not identify any serious safety concerns during pregnancy for tenofovir. In combination with other anti-HIV drugs, tenofovir is the first line of treatment for adults with HIV. The researchers called for additional studies to follow the children as they grow and develop, to identify any potential long term effects of the treatment. Information on Tenofovir and formulations containing tenofovir is available at http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0000198/.

The study was undertaken because earlier studies had shown laboratory animals exposed to tenofovir in the womb were smaller at birth than were their unexposed peers.

Because of its safety and effectiveness, many women who have HIV take the drug for their health, often before they become pregnant. Similarly, because the drug is so effective for adult use and because there have been no problems reported in human infants related to their mother's use of tenofovir, many physicians will prescribe it for pregnant women, both to safeguard the women's health and to prevent the virus from being passed on to their infants. However, before the current research, the drug had not been specifically studied for its potential effects on infants whose mothers took it during pregnancy.

"Physicians treating pregnant women for HIV face a dilemma: do they continue treating a pregnant woman with a drug that is highly effective for adults but which has not been studied for its effects on infants, or do they switch the woman to another therapy, which may not be as effective and well-tolerated?" said first author George K. Siberry, M.D., of the Pediatric, Adolescent and Maternal AIDS Branch of the NIH's Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), the NIH institute that conducted the study. "Our findings indicate that tenofovir does not affect the growth of the fetus."

Over the seven years of the study, the number of participants being treated with tenofovir increased sharply, the study authors noted. In 2003, 14 percent of mothers in the study had been prescribed the drug, compared with 43 percent in 2010.

"The priority has been to treat mothers and prevent an infant's infection," said co-author Paige L. Williams, Ph.D., of the Harvard School of Public Health, Boston. "However, it's important to monitor the effects of these drugs on the infant."

The research was conducted as part of the Pediatric HIV/AIDS Cohort Study (PHACS), which is supported by the NICHD, the National Institute of Allergy and Infectious Diseases, the National Institute on Drug Abuse, the National Institute of Mental Health, the National Institute on Deafness and other Communication Disorders, the National Heart, Lung, and Blood Institute, the National Institute of Neurological Disorders and Stroke, and the National Institute on Alcohol Abuse and Alcoholism.

Dr. Siberry and Dr. Williams collaborated with colleagues at the State University of New York Downstate, Brooklyn; University of Miami School of Medicine; Indiana University School of Medicine, Indianapolis; Harvard; and the NICHD.

Their findings appear online in the journal AIDS.

The study included 2,000 U.S. infants born to HIV-positive mothers between 2003 and 2010. The researchers collected data for the infants' size relative to their gestational age (time they had spent in the womb), their birth weight, length at birth, and the circumference of their head. The researchers recorded similar measurements when the child was 1 year old.

They found that mothers taking tenofovir in combination with other anti-HIV medications and mothers on anti-HIV drug combinations that did not include tenofovir gave birth to infants who were smaller, on average, than infants born to HIV-negative mothers. However, they did not find significant differences between infants from the two groups of HIV-positive mothers.

The tenofovir-exposed infant's smaller average size and head circumference at one year of age suggests tenofovir could have a delayed effect on growth. Further research on this and other classes of anti-HIV drugs is ongoing in the PHACS.

"Overall, this study produced reassuring information regarding the use of tenofovir," said Dr. Siberry. "Although further research is needed, on balance, our findings favor the use of tenofovir in pregnancy to ensure good outcomes in the mother and prevent transmission of HIV to the infant."

About the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD): The NICHD sponsors research on development, before and after birth; maternal, child, and family health; reproductive biology and population issues; and medical rehabilitation. For more information, visit the Institute's website at http://www.nichd.nih.gov/.

About the National Institutes of Health (NIH): NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit http://www.nih.gov.

Robert Bock | EurekAlert!
Further information:
http://www.nih.gov

More articles from Health and Medicine:

nachricht Laser activated gold pyramids could deliver drugs, DNA into cells without harm
24.03.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences

nachricht What does congenital Zika syndrome look like?
24.03.2017 | University of California - San Diego

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>