Quantcast
Connect with us

Could one shot every two months eradicate HIV?

Published

on

A two-drug injection may present the future of HIV prevention – a shot given every two months that would reduce a person’s risk of acquiring HIV by more than 90 percent.

In the latest trials, an injection once every eight weeks performed even better than daily pills, which currently are the gold standard of HIV treatment.

The two drugs — Johnson & Johnson’s rilpivirine and ViiV Healthcare’s cabotegravir – were found in October to reduce the HIV virus in infected patients to undetectable levels in 95 percent of cases when taking a shot every eight weeks. This compared to 91 percent of those taking an oral pill.

ADVERTISEMENT

Both are packaged as nanoparticles, which slowly dissipate in the blood over time. Cabotegravir has an exceptionally long half-life of 21-50 days, allowing for long dosing periods.

Scientists are now conducting Phase II clinical trials to see whether these two drugs may work individually as PrEP, or pre-exposure prophylaxis, a relatively new concept in which uninfected patients take medication to prevent HIV infection.

Two years ago, with little fanfare, scientists reported that cabotegravir protected monkeys from simian HIV. Eight monkeys were injected with the drug and eight were given a placebo. Challenged with rectal injections of simian HIV, all eight given the drug remained free of the virus, whereas all eight given a placebo became infected.

Currently, only Truvada – a two-drug combination pill – is approved for pre-exposure treatment. Approved in 2012, Truvada was originally found to reduce infection by 92 percent. Two real-world studies, however, recently found it 100 percent effective in preventing HIV in those who took the pill every day.

The trouble with Truvada is that many find it difficult to comply with a daily pill regimen. Many Truvada trials found poor adherence to a daily pill. Truvada only remains fully effective if it’s taken four or more times per week.

ADVERTISEMENT

Thus, clinicians – and the CDC – are excited about new treatments that don’t require daily adherence. This excitement carries over into treatment for HIV-infected patients as well. According to CDC estimates presented at the National HIV Prevention Conference in Atlanta early this month, only 30 percent of Americans with HIV have fully suppressed the virus. These individuals are considered “undetectable.”

Today, those on daily medication are often able to achieve “undetectable” status, in which the virus is not detectable by standard blood tests. Recent studies have shown those with undetectable viral loads are not able to pass on the HIV virus.

The reason injectables would be valuable for HIV treatment and prevention, then, is that experts believe medication adherence could dramatically improve, preventing those who are infected from passing on the virus. It could also increase adherence among those taking PrEP to prevent infection.

ADVERTISEMENT

Initially, scientists believed the injectable’s effectiveness period could be stretched to three months. According to Carl Dieffenbach, the Director for the Division of AIDS at the National Institutes of Health, however, trials have found the period of effectiveness is closer to two. Dieffenbach presented on future HIV prevention treatments at the National Conference for HIV Prevention in December.

Those who follow the HIV drug pipeline say the earliest they believe an injectable would come on the market would be 2020. This is because the FDA requires long-term testing of new treatments, and each clinical trial must be longer than the one before. Stage 3 clinical trials typically last several years.

ADVERTISEMENT

Tim Horn of Treatment Action Group in New York, who monitors the drug pipeline, cautioned Raw Story that it would be unwise for those who are skeptical of the current HIV prevention drug to wait for an injectable treatment.

“Folks who are sort of waiting on the sidelines for long-acting PrEP options will have a long wait before something is on the market and available,” added Jim Pickett of AIDS Foundation of Chicago, speaking to POZ Magazine. “No one should be under the illusion, or delusion, that this method is coming to a pharmacy near you anytime soon.”

Since the beginning of the HIV epidemic, which began in earnest in the early 1980s, nearly 75 million have been infected with the virus.

ADVERTISEMENT

The World Health Organization estimates about one-half percent of the population of the Americas is infected. In Sub-Saharan Africa, infection rates hover around 4 percent. Sub-Saharan Africa accounts for more than 70 percent of the world’s HIV cases.

Globally, nearly 1 percent of the world’s population lives with HIV.


Report typos and corrections to: [email protected].
READ COMMENTS - JOIN THE DISCUSSION
Continue Reading

Breaking Banner

Big turnout for protest in Texas town known as a ‘haven’ for the Ku Klux Klan

Published

on

Protesters gathered in Vidor, Texas on Saturday for a rally against racism and police violence.

https://twitter.com/JordanJamesTV/status/1269366486189080576

The East Texas town has long had a reputation for racism.

Vidor is a small city of about 11,000 people near the Texas Gulf Coast, not too far from the Louisiana border. Despite the fact that Beaumont, a much bigger city just 10 minutes away, is quite integrated, Vidor is not. There are very few blacks there; it's mostly white. That is in large part because of a history of racism in Vidor, a past that continues to haunt the present," Keith Oppenheim reported for CNN in 2006.

Continue Reading

Breaking Banner

BUSTED: Key Trump aide caught pushing racist vigilantism on social media

Published

on

Video of a chainsaw-wielding Texas man threatening protesters while shouting the n-word went viral on Friday.

While many people were shocked by the video, one of President Donald Trump's top advisors supported the racism and vigilantism in documented in the video, according to a new report.

"President Donald Trump and his allies for years have amplified racist messages on Twitter while simultaneously reaching out to black and Hispanic voters, a dissonant balancing act that’s now rocking the GOP amid nationwide racial-justice protests," Politico reported Saturday. "The two competing forces collided Saturday on the Twitter feed of Trump campaign senior adviser Mercedes Schlapp, when she boosted a tweet that lauded a man in Texas in a viral video as he yelled the n-word and wielded a chainsaw to chase away anti-racism demonstrators."

Continue Reading
 

2020 Election

Trump may ‘fatally wound’ his reelection by snubbing North Carolina: CNN analyst

Published

on

President Donald Trump risks alienating voters in the key swing state of North Carolina if he moves his RNC convention speech to another state, political analyst James C. Moore explained for CNN.

"Of all the institutions the Trump presidency is harming, it's likely no one suspected the Republican National Convention might be one of them. But President Donald Trump's refusal to fully acknowledge the risks associated with the pandemic is creating a new political threat to his own candidacy," he wrote. "The Republican National Convention was slated to take place in Charlotte, North Carolina, in August. But the pandemic struck, and the governor has insisted on a scaled down event with safety precautions that include social distancing and face masks. The President, who wants his huddled masses shoulder to shoulder as they shout their acclimations, is now looking to deliver his convention speech in another city."

Continue Reading
 
 
You need honest news coverage. Help us deliver it. Join Raw Story Investigates for $1. Go ad-free.
close-image