Soy Sauce Compound Shows Promise To Fight HIV

Soy Sauce Compound Shows Promise To Fight HIV

For HIV patients, resistance to drug therapies such as Tenofovir is commonplace. A compound in soy sauce, however, can be 70 times more potent and it works better on drug-resistant HIV.

“Patients who are treated for HIV infections with Tenofovir eventually develop resistance to the drugs that prevent an effective or successful defense against the virus,” says Stefan Sarafianos, associate professor of molecular microbiology and immunology in the University of Missouri School of Medicine.

“EFdA, the molecule we are studying, is less likely to cause resistance in HIV patients because it is more readily activated and is less quickly broken down by the body as similar existing drugs.”

Surprise Discovery

In 2001, a Japanese soy sauce company inadvertently discovered the EFdA molecule while trying to enhance the flavor of their product. The flavor enhancer is part of the family of compounds called “nucleoside analogues,” which is very similar to existing drugs for the treatment of HIV and other viruses. EFdA samples were sent for further testing, which confirmed EFdA’s potential usefulness against HIV and started more than a decade of research.


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EFdA, along with eight existing HIV drugs, is part of the class of compounds called nucleoside reverse transcriptase inhibitors (NRTIs). NRTIs “hijack” the HIV replicating process by “tricking” building blocks inside the virus. Since EFdA appears similar to those building blocks, the virus is misled into using the imposter, which prevents HIV replication and halts the spread of the virus.

Lock And Key

In their latest study published in the International Journal of Pharmaceutics, Sarafianos and his colleagues, including researchers from the University of Pittsburgh and the National Institutes of Health, helped define how EFdA works on a molecular level.

Using virology techniques and nuclear magnetic resonance spectroscopy (NMR), they pieced together the exact structure and configuration of the molecule.

Compounds developed by Sarafianos and his team currently are being tested for usefulness as potential HIV-halting drugs with pharmaceutical company Merck.

“The structure of this compound is very important because it is a lock-and-key kind of mechanism that can be recognized by the target,” Sarafianos says. “EFdA works extremely well on HIV that is not resistant to anti-AIDS drugs, it also works even better on HIV that’s become resistant to Tenofovir.”

Grants from the National Institutes of Health funded the research.

Source: University of Missouri

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