Nav: Home

TSRI anti-heroin vaccine found effective in non-human primates

June 06, 2017

LA JOLLA, CA - June 6, 2017 - A vaccine developed at The Scripps Research Institute (TSRI) to block the "high" of heroin has proven effective in non-human primates. This is the first vaccine against an opioid to pass this stage of preclinical testing.

"This validates our previous rodent data and positions our vaccine in a favorable light for anticipated clinical evaluation," said study leader Kim Janda, the Ely R. Callaway Jr. Professor of Chemistry and member of the Skaggs Institute for Chemical Biology at TSRI.

This research was published recently in the Journal of the American Chemical Society. The primate experiments were led by researchers at Virginia Commonwealth University.

The vaccine works by exposing the immune system to a part of the heroin molecule's telltale structure. This teaches the immune system to produce antibodies against heroin and its psychoactive products. The antibodies neutralize heroin molecules, blocking them from reaching the brain to cause a feeling of euphoria.

Researchers believe that blocking the high of heroin will help eliminate the motivation for many recovering addicts to relapse into drug use. In recent years, public health officials around the world have labeled heroin use as an epidemic.

The Janda Laboratory at TSRI has been working on their heroin vaccine for over eight years; the researchers had previously tested vaccine candidates under laboratory conditions and in rodents, where the strategy proved effective for neutralizing heroin.

For the new study in rhesus monkeys, the researchers redesigned their vaccine candidate to more closely resemble heroin, with the goal of better stimulating the immune system to attack this opioid.

The researchers found that the four primates that were given three doses of this vaccine showed an effective immune response and could neutralize varying doses of heroin. This effect was most acute in the first month after vaccination but lasted for over eight months. The researchers also found no negative side effects from the vaccine.

"We believe this vaccine candidate will prove safe for human trials," Janda said. He pointed out that the components of the vaccine have either already been approved by the FDA or have passed safety tests in previous clinical trials.

Interestingly, two of the four primates tested had been pre-vaccinated with the same vaccine candidate for a more basic pilot study seven months prior to the experiment in this study. The researchers found that these two primates showed a much higher response to the vaccine in the second round of experiments. This suggested their antibody-producing cells held an immunological "memory" of the vaccine. If this effect holds true in humans, a recovering addict would have long-term immunity to heroin.

"We were really encouraged to see the vaccine produce such lasting effects in non-human primate models," said Bremer.

This is the first vaccine against heroin to succeed in primate models. Vaccines against other drugs of abuse have been tested in humans without first completing non-human primate trials--and failed. Bremer said the new heroin vaccine is different because the researchers took a closer look at the chemistry of the vaccine, studying how well antibodies elicited by the vaccine could bind to drug molecules. "These steps let us put our best foot forward when we went into the primate study," Bremer said.

The researchers noted that this vaccine candidate works only against heroin and not other opioid-based pain killers or medications for treating opioid addiction or overdose, leaving those open for use in emergency medical situations and for prescription medicines and substance use disorders.

The next step in this research will be to license the vaccine to an outside company for partnering in clinical trials.
-end-
In addition to Janda and Bremer, authors of the study, "Development of a Clinically Viable Heroin Vaccine," were Bin Zhou of TSRI; and Joel E. Schlosburg, Matthew L. Banks, Floyd F. Steele and Justin L. Poklis of Virginia Commonwealth University.

The study was supported by the National Institutes of Health (grants UH2DA041146, R01DA026625, K99DA037344 and F31DA037709) and the Skaggs Institute for Chemical Biology.

About The Scripps Research Institute

The Scripps Research Institute (TSRI) is one of the world's largest independent, not-for-profit organizations focusing on research in the biomedical sciences. TSRI is internationally recognized for its contributions to science and health, including its role in laying the foundation for new treatments for cancer, rheumatoid arthritis, hemophilia, and other diseases. An institution that evolved from the Scripps Metabolic Clinic founded by philanthropist Ellen Browning Scripps in 1924, the institute now employs more than 2,500 people on its campuses in La Jolla, CA, and Jupiter, FL, where its renowned scientists--including two Nobel laureates and 20 members of the National Academies of Science, Engineering or Medicine--work toward their next discoveries. The institute's graduate program, which awards PhD degrees in biology and chemistry, ranks among the top ten of its kind in the nation. In October 2016, TSRI announced a strategic affiliation with the California Institute for Biomedical Research (Calibr), representing a renewed commitment to the discovery and development of new medicines to address unmet medical needs. For more information, see http://www.scripps.edu.

Scripps Research Institute

Related Immune System Articles:

Too much salt weakens the immune system
A high-salt diet is not only bad for one's blood pressure, but also for the immune system.
Parkinson's and the immune system
Mutations in the Parkin gene are a common cause of hereditary forms of Parkinson's disease.
How an immune system regulator shifts the balance of immune cells
Researchers have provided new insight on the role of cyclic AMP (cAMP) in regulating the immune response.
Immune system upgrade
Theoretically, our immune system could detect and kill cancer cells.
Using the immune system as a defence against cancer
Research published today in the British Journal of Cancer has found that a naturally occurring molecule and a component of the immune system that can successfully target and kill cancer cells, can also encourage immunity against cancer resurgence.
First impressions go a long way in the immune system
An algorithm that predicts the immune response to a pathogen could lead to early diagnosis for such diseases as tuberculosis
Filming how our immune system kill bacteria
To kill bacteria in the blood, our immune system relies on nanomachines that can open deadly holes in their targets.
Putting the break on our immune system's response
Researchers have discovered how a tiny molecule known as miR-132 acts as a 'handbrake' on our immune system -- helping us fight infection.
Decoding the human immune system
For the first time ever, researchers are comprehensively sequencing the human immune system, which is billions of times larger than the human genome.
Masterswitch discovered in body's immune system
Scientists have discovered a critical part of the body's immune system with potentially major implications for the treatment of some of the most devastating diseases affecting humans.
More Immune System News and Immune System Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Climate Mindset
In the past few months, human beings have come together to fight a global threat. This hour, TED speakers explore how our response can be the catalyst to fight another global crisis: climate change. Guests include political strategist Tom Rivett-Carnac, diplomat Christiana Figueres, climate justice activist Xiye Bastida, and writer, illustrator, and artist Oliver Jeffers.
Now Playing: Science for the People

#562 Superbug to Bedside
By now we're all good and scared about antibiotic resistance, one of the many things coming to get us all. But there's good news, sort of. News antibiotics are coming out! How do they get tested? What does that kind of a trial look like and how does it happen? Host Bethany Brookeshire talks with Matt McCarthy, author of "Superbugs: The Race to Stop an Epidemic", about the ins and outs of testing a new antibiotic in the hospital.
Now Playing: Radiolab

Speedy Beet
There are few musical moments more well-worn than the first four notes of Beethoven's Fifth Symphony. But in this short, we find out that Beethoven might have made a last-ditch effort to keep his music from ever feeling familiar, to keep pushing his listeners to a kind of psychological limit. Big thanks to our Brooklyn Philharmonic musicians: Deborah Buck and Suzy Perelman on violin, Arash Amini on cello, and Ah Ling Neu on viola. And check out The First Four Notes, Matthew Guerrieri's book on Beethoven's Fifth. Support Radiolab today at Radiolab.org/donate.