Researchers describe first 'functional HIV cure' in an infant

March 3, 2013

A team of researchers from Johns Hopkins Children's Center, the University of Mississippi Medical Center and the University of Massachusetts Medical School describe the first case of a so-called "functional cure" in an HIV-infected infant. The finding, the investigators say, may help pave the way to eliminating HIV infection in children.

A report on the case is scheduled for presentation at a press conference on Sunday, March 3, at the 20th Conference on Retroviruses and Opportunistic Infections (CROI) in Atlanta. Johns Hopkins Children's Center Deborah Persaud, M.D., lead author on the report, and University of Massachusetts Medical School immunologist and professor Katherine Luzuriaga, M.D., headed a team of laboratory investigators. Pediatric HIV specialist Hannah Gay, M.D., associate professor of pediatrics at the University of Mississippi Medical Center provided treatment to the baby.

The infant described in the report underwent remission of after receiving antiretroviral therapy (ART) within 30 hours of birth. The investigators say the prompt administration of likely led to this infant's cure by halting the formation of hard-to-treat viral reservoirs—dormant cells responsible for reigniting the infection in most HIV patients within weeks of stopping therapy.

Read more: US baby 'cured' of HIV: The experts respond

"Prompt in newborns that begins within days of exposure may help infants clear the virus and achieve long-term remission without lifelong treatment by preventing such viral hideouts from forming in the first place," Persaud says.

The researchers say they believe this is precisely what happened in the child described in the report. That infant is now deemed "functionally cured," a condition that occurs when a patient achieves and maintains long-term viral remission without lifelong treatment and standard clinical tests fail to detect in the blood.

In contrast to a sterilizing cure—a complete eradication of all viral traces from the body—a functional cure occurs when viral presence is so minimal, it remains undetectable by standard clinical tests, yet discernible by ultrasensitive methods.

The child described in the current report was born to an HIV-infected mother and received combination antiretroviral treatment beginning 30 hours after birth. A series of tests showed progressively diminishing viral presence in the infant's blood, until it reached undetectable levels 29 days after birth. The infant remained on antivirals until 18 months of age, at which point the child was lost to follow-up for a while and, the researchers say, stopped treatment. Ten months after discontinuation of treatment, the child underwent repeated standard blood tests, none of which detected HIV presence in the blood. Test for HIV-specific antibodies—the standard clinical indicator of HIV infection—also remained negative throughout.

Currently, high-risk newborns—those born to mothers with poorly controlled infections or whose mothers' HIV status is discovered around the time of delivery—receive a combination of antivirals at prophylactic doses to prevent infection for six weeks and start therapeutic doses if and once infection is diagnosed. But this particular case, the investigators say, may change the current practice because it highlights the curative potential of very early ART.

Specialists say natural viral suppression without treatment is an exceedingly rare phenomenon observed in less than half a percent of HIV-infected adults, known as "elite controllers," whose immune systems are able to rein in viral replication and keep the virus at clinically undetectable levels. HIV experts have long sought a way to help all achieve elite-controller status. The new case, the researchers say, may be that long-sought game-changer because it suggests prompt ART in newborns can do just that.

The investigators caution they don't have enough data to recommend change right now to the current practice of treating high-risk infants with prophylactic, rather than therapeutic, doses but the infant's case provides the rationale to start proof-of-principle studies in all high-risk newborns.

"Our next step is to find out if this is a highly unusual response to very early antiretroviral therapy or something we can actually replicate in other high-risk newborns," says Persaud, who is also the scientific chair of the HIV Cure Committee of the International Maternal, Pediatric Adolescent AIDS Clinical (IMPAACT) network, a consortium of researchers and institutions that was critical in spearheading the earliest clinical trials of mother-to-child transmission and early treatment of infants 15 years ago.

A single case of sterilizing cure has been reported so far, the investigators note. It occurred in an HIV-positive man treated with a bone marrow transplant for leukemia. The bone marrow cells came from a donor with a rare genetic mutation of the white blood cells that renders some people resistant to HIV, a benefit that transferred to the recipient. Such a complex treatment approach, however, HIV experts agree, is neither feasible nor practical for the 33 million people worldwide infected with HIV.

"Complete viral eradication on a large scale is our long-term goal but, for now, remains out of reach, and our best chance may come from aggressive, timely and precisely targeted use of antiviral therapies in high-risk newborns as a way to achieve functional cure," says Luzuriaga.

Despite the promise this approach holds for infected newborns, the researchers say preventing mother-to-child transmission remains the primary goal.

"Prevention really is the best cure, and we already have proven strategies that can prevent 98 percent of newborn infections by identifying and treating HIV-positive pregnant women," says Gay, the HIV expert who treated the infant.

The research was funded by the National Institutes of Health and by the American Foundation for AIDS Research (amfAR).

Explore further: Early temporary treatment for HIV can delay the time to long-term treatment

More information: International Maternal, Pediatric, Adolescent AIDS Clinical Trials (IMPAACT) network

Conference on Retroviruses and Opportunistic Infections (CROI)

Related Stories

Early temporary treatment for HIV can delay the time to long-term treatment

March 27, 2012
A study in this week's PLoS Medicine suggests that when people are first infected with HIV (primary HIV infection), temporary treatment with antiretroviral drugs (cART) for 24 weeks can delay the need to restart treatment ...

Gene therapy reduces HIV levels in small trials

September 20, 2011
(Medical Xpress) -- This weekend at the Interscience Conference on Antimicrobial Agents and Chemotherapy in Chicago, Illinois, researchers from two different study groups, one on the east coast and one on the west coast, ...

Drug combo much better than AZT alone at preventing mother-to-infant HIV transmission

June 20, 2012
Non-breastfed babies born to HIV-positive mothers who didn't receive antiretroviral therapy during pregnancy are routinely given zidovudine, commonly known as AZT, shortly after birth to prevent mother-to-child transmission ...

Recommended for you

Scientists find where HIV 'hides' to evade detection by the immune system

October 19, 2017
In a decades-long game of hide and seek, scientists from Sydney's Westmead Institute for Medical Research have confirmed for the very first time the specific immune memory T-cells where infectious HIV 'hides' in the human ...

National roll-out of PrEP HIV prevention drug would be cost-effective

October 18, 2017
Providing pre-exposure prophylaxis (PrEP) medication to men who have sex with men who are at high risk of HIV infection (equivalent to less than 5% of men who have sex with men at any point in time) in England would be cost-effective, ...

Regulatory T cells harbor HIV/SIV virus during antiviral drug treatment

October 17, 2017
Scientists at Yerkes National Primate Research Center, Emory University have identified an additional part of the HIV reservoir, immune cells that survive and harbor the virus despite long-term treatment with antiviral drugs.

New research opens the door to 'functional cure' for HIV

October 17, 2017
In findings that open the door to a completely different approach to curing HIV infections, scientists from the Florida campus of The Scripps Research Institute (TSRI) have for the first time shown that a novel compound effectively ...

Researchers create molecule that could 'kick and kill' HIV

October 5, 2017
Current anti-AIDS drugs are highly effective at making HIV undetectable and allowing people with the virus to live longer, healthier lives. The treatments, a class of medications called antiretroviral therapy, also greatly ...

A sixth of new HIV patients in Europe 50 or older: study

September 27, 2017
People aged 50 and older comprise a growing percentage of HIV patients in Europe, accounting for one in six new cases in 2015, researchers said Wednesday.

1 comment

Adjust slider to filter visible comments by rank

Display comments: newest first

gmurphy
5 / 5 (2) Mar 03, 2013
Such a terrible thing for a child to inherit, it is heartening to see that it's possible to give them a chance at a decent life, with further research, perhaps these 'reservoirs' of the virus can be flushed out in adult patients.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.