Health
Experts laud injection that reportedly offers 100% protection against HIV/AIDS
- Twice-yearly shots used to treat AIDS were 100% effective in preventing new infections in women, according to a new study.
- There were no infections among the young women and girls who received the shots in a study of about 5,000 participants in South Africa and Uganda.
- The shots, made by U.S. drugmaker Gilead and sold as Sunlenca, are currently approved as a treatment for HIV in several regions.
Twice-yearly shots used to treat AIDS were 100% effective in preventing new infections in women, according to study results published Wednesday.
There were no infections in the young women and girls that got the shots in a study of about 5,000 in South Africa and Uganda, researchers reported. In a group given daily prevention pills, roughly 2% ended up catching HIV from infected sex partners.
“To see this level of protection is stunning,” said Salim Abdool Karim of the injections. He is director of an AIDS research center in Durban, South Africa, who was not part of the research.
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The shots made by U.S. drugmaker Gilead and sold as Sunlenca are approved in the U.S., Canada, Europe and elsewhere, but only as a treatment for HIV. The company said it is waiting for results of testing in men before seeking permission to use it to protect against infection.
A pharmacist holds a vial of lenacapavir, the new HIV prevention injectable drug, at the Desmond Tutu Health Foundation’s Masiphumelele Research Site in Cape Town, South Africa, on July 23, 2024. The twice-yearly shots used to treat AIDS were 100% effective in preventing new infections in women, according to study results published on Wednesday. (AP Photo/Nardus Engelbrecht)
The results in women were published Wednesday in the New England Journal of Medicine and discussed at an AIDS conference in Munich. Gilead paid for the study and some of the researchers are company employees. Because of the surprisingly encouraging results, the study was stopped early and all participants were offered the shots, also known as lenacapavir.
While there are other ways to prevent HIV infection, like condoms or daily pills, consistent use has been a problem in Africa. In the new study, only about 30% of participants given Gilead’s Truvada or Descovy prevention pills actually took them — and that figure dropped over time.
The prospect of a twice-a-year shot is “quite revolutionary news” for our patients, said Thandeka Nkosi, who helped run the Gilead research at the Desmond Tutu Health Foundation in Masiphumelele, South Africa. “It gives participants a choice and it just eliminates the whole stigma around taking pills” to prevent HIV.
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Experts working to stop the spread of AIDS are excited about the Sunlenca shots but are concerned Gilead hasn’t yet agreed on an affordable price for those who need them the most. The company said it would pursue a “voluntary licensing program,” suggesting that only a select number of generic producers would be allowed to make them.
“Gilead has a tool that could change the trajectory of the HIV epidemic,” said Winnie Byanyima, executive director of the Geneva-based U.N. AIDS agency.
A pharmacist holds a vial of lenacapavir at the Desmond Tutu Health Foundation’s Masiphumelele Research Site in Cape Town, South Africa, on July 23, 2024. (AP Photo/Nardus Engelbrecht)
She said her organization urged Gilead to share Sunlenca’s patent with a U.N.-backed program that negotiates broad contracts allowing generic drugmakers to make cheap versions of drugs for poorer countries worldwide. As an HIV treatment, the drug costs more than $40,000 a year in the U.S., although what individuals pay varies.
Dr. Helen Bygrave of Doctors Without Borders said in a statement that the injections could “reverse the epidemic if it is made available in the countries with the highest rate of new infections.” She urged Gilead to publish a price for Sunlenca that would be affordable for all countries.
In a statement last month, Gilead said it was too early to say how much Sunlenca would cost for prevention in poorer countries. Dr. Jared Baeten, Gilead’s senior vice president of clinical development, said the company was already talking to generics manufacturers and understood how “deeply important it is that we move at speed.”
Another HIV prevention shot, Apretude, which is given every two months, is approved in some countries, including in Africa. It sells for about $180 per patient per year, which is still too pricey for most developing countries.
A lab technician works with vials of lenacapavir at the Desmond Tutu Health Foundation’s Masiphumelele Research Site in Cape Town, South Africa, on July 23, 2024. (AP Photo/Nardus Engelbrecht)
Byanyima said the people who need long-lasting protection the most include women and girls who are victims of domestic violence and gay men in countries where same-sex relationships are criminalized. According to UNAIDS, 46% of new HIV infections globally in 2022 were in women and girls, who were three times more likely to get HIV than males in Africa.
Byanyima compared the news about Sunlenca to the discovery decades ago of AIDS drugs that could turn HIV infection from a death sentence into a chronic illness. Back then, South African President Nelson Mandela suspended patents to allow wider access to the drugs; the price later dropped from about $10,000 per patient per year to about $50.
Olwethu Kemele, a health worker at the Desmond Tutu Health Foundation, predicted the shots could boost the number of people coming in for HIV prevention and slow the virus’ spread. She said young women often hide the pills to avoid questions from boyfriends and family members. “It makes it hard for the girls to continue,” she said.
In a report on the state of the global epidemic released this week, UNAIDS said that fewer people were infected with HIV in 2023 than at any point since the late 1980s. Globally, HIV infects about 1.3 million people every year and kills more than 600,000, mainly in Africa. While significant progress has been made in Africa, HIV infections are rising in Eastern Europe, Latin America and the Middle East.
In other research presented at the AIDS conference, Andrew Hill of the University of Liverpool and colleagues estimated that once production of Sunlenca is expanded to treat 10 million people, the price should fall to about $40 per treatment. He said it was critical that health authorities get access to Sunlenca as soon as possible.
“This is about as close as you can get to an HIV vaccine,” he said.
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An accidental lab discovery has opened the door to entirely new ways of preventing the flu.
While investigating how influenza replicates, researchers discovered that different flu strains use completely different strategies to infiltrate human cells, SWNS reported.
By targeting the specific molecules the viruses rely on, scientists found that they could block them from entering new cells and halt their replication altogether.
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Researchers say these “fundamental insights” into seasonal influenza highlight a clear path toward developing better preventive medications.
“The hope is that fundamental, curiosity-based research like this helps to pave the way for novel strategies to treat and prevent influenza infections,” principal investigator Dr. Emily Bruce, from the University of Vermont’s Larner College of Medicine, said in the SWNS report.
While investigating how influenza replicates, researchers discovered that different flu strains use completely different strategies to infiltrate human cells. (iStock)
While several flu strains cause illness, H1N1 and H3N2 influenza A viruses are the most common. However, current flu tests cannot differentiate between them, and clinical treatments are identical for both.
Although vaccines and antivirals are available, Bruce noted a “dire” need for better medications to stop the virus from spreading cell to xxcell.
“You don’t get sick when a virus is in one cell,” he noted. “You get sick because a virus replicates itself and goes into many more cells.”
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The study, which was published in The Journal of Virology, originally aimed to map how viral RNA segments are transported within cells to create new viral particles.
The team used H1N1 and H3N2 viruses isolated from the nasal passages of positive patients in 2022.
Clinical treatments remain identical for both primary strains of the flu virus. (iStock)
During the investigation, the team unexpectedly stumbled upon a cellular pathway that blocked the virus from entering lung cells, SWNS reported.
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The data revealed that when a specific human protein called Rab11B was depleted, H3N2 viruses failed to enter human lung cells. H1N1 viruses were completely unaffected.
Using reverse genetics, the team mapped this defect and uncovered a brand-new, H3N2-specific role for Rab11B during viral entry.
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This discovery challenged the scientific assumption that all flu viruses enter cells the same way.
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“Viruses are like pirates from different countries hijacking someone’s ship,” Bruce said. “Different viruses, like different types of pirates, use different methods to get onboard.”
This discovery challenged the scientific assumption that all flu viruses enter cells the same way. (iStock)
“We had previously thought that all flu viruses used the same way to get into a cell, but we discovered that this is not true,” she went on. “H1N1 and H3N2 need different proteins to get in, and if you get rid of the right protein, a specific virus can’t get in.”
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While these findings identify a critical cellular pathway for viral entry, the study was conducted using isolated cells, the researchers acknowledged.
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Further research is needed to determine whether blocking the protein is safe and effective within a live, complex human respiratory system.
Bruce and the team hope to conduct further research to determine whether this Rab11B-dependency is a fundamental property of H3N2, or if it’s a trait unique to currently circulating flu strains.
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Eating processed meat like ham, sausage and bacon may be linked to a higher risk of certain types of cancer, according to new research.
While health organizations have already confirmed that processed meat can contribute to colon cancer, this study looked closer at cancers in the upper digestive tract, where the link has historically been less clear.
To understand these connections, researchers from the European Prospective Investigation into Cancer and Nutrition (EPIC), one of the world’s largest long-term nutrition and cancer cohorts, tracked the health and diets of 450,112 people across Europe for an average of 14 years.
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The study group included 131,426 men and 318,686 women, according to the study’s press release.
During the follow-up period, 876 people developed stomach cancer and 215 people developed esophageal adenocarcinoma, which is cancer of the tube connecting the mouth to the stomach.
For female participants, eating both processed meat and white meat was linked to an increased risk of developing the disease. (iStock)
Researchers tracked where the stomach cancers grew, separating them into the upper part of the stomach near the throat and the lower part of the stomach.
The researchers also sorted the tumors into two categories based on how the cancer cells appeared under a microscope: intestinal, which forms more organized structures, and diffuse, in which the cells are more scattered throughout the tissue.
BACTERIA IN YOUR MOUTH MAY TRAVEL TO THE GUT AND TRIGGER STOMACH CANCER, RESEARCH FINDS
After adjusting for other lifestyle factors, the researchers found that for every extra 30 grams of processed meat a person ate per day, their overall risk of stomach cancer went up by 9%. Eating that same extra 30 grams a day was also linked to a 13% higher risk of esophageal adenocarcinoma.
A standard single slice of regular deli-sliced ham or lunch meat averages around 28 grams, according to USDA data and nutritional tracking databases.
An extra 20 grams of white meat, such as chicken and turkey, was linked to a 12% higher risk of cancer in the main body of the stomach. (iStock)
An extra 20 grams of white meat, such as chicken or turkey, was linked to a 12% higher risk of cancer in the main body of the stomach, the researchers noted.
The study also revealed differences between men and women. For male participants, only processed meat showed a clear, statistically significant link to a higher risk of stomach cancer. For female participants, however, eating both processed meat and white meat was linked to an increased risk.
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These findings align with global health benchmarks, particularly those established by the World Health Organization’s International Agency for Research on Cancer.
The agency has long classified processed meat as a known human carcinogen, primarily due to its strong, well-documented links to colorectal cancer.
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However, health organizations have also consistently pointed to a potential, yet less definitive, relationship between these meats and cancers of the stomach.
Eating 30 grams of processed meat a day, or the equivalent to one slice of ham, was linked to a 13% higher risk of esophageal adenocarcinoma. (iStock)
Further scientific investigation is needed to confirm the findings and to account for other underlying risk factors, such as certain stomach infections, which could interact with dietary habits.
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A key limitation of the study is its reliance on self-reported diets, which can sometimes lead to inaccuracies in how participants recall their meat consumption over time, the researchers noted.
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The findings were published in the International Journal of Cancer.
Fox News Digital reached out to the researchers requesting comment.
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