God, AIDS, Africa & HOPE

Reflections / Gedanken

POZ Magazine: Therapeutic Vaccine Achieves “Functional Cure” in Monkeys

Therapeutic Vaccine Achieves “Functional Cure” in Monkeys

The monkey version of a therapeutic vaccine by VIRxSYS Corporation achieved a “functional cure”—fully controlling simian immunodeficiency virus (SIV) production and halting disease progression in a subset of vaccinated monkeys.
VIRxSYS has been pursuing gene therapy against HIV for several years, but it has been exploring a therapeutic vaccine as well. Its technology involves packaging HIV’s genetic material within a molecular delivery vehicle, commonly known as a vector. The company is using a lentivirus as the vector for its current vaccine, dubbed VRX1273.
As a step before human testing, VIRxSYS scientists gave a simian version of its VRX1273 vaccine or a placebo to several monkeys in their laboratory. After the monkeys were vaccinated, they were infected with a virulent strain of SIV. Gary McGarrity, PhD, executive vice president of scientific and clinical affairs at VIRxSYS, in Gaithersberg, Maryland, reported the results of this experiment at the AIDS Vaccine 2010 conference, which was held September 28 to October 1 in Atlanta.
Two of the five monkeys that received VRX1273 were able to maintain full control of SIV. In the placebo group, several of the monkeys died, providing evidence that VRX1273 both controls SIV reproduction in infected monkeys and provides a survival benefit.
“We and HIV key opinion leaders are very optimistic about these long-term results showing viral suppression, protection of the immune system and survival in this prophylactic study,” McGarrity said. “In addition, the full control of SIV replication following infection of two of our monkeys is a significant milestone in our research to develop effective therapeutic and prophylactic vaccines for HIV.”

Source:  http://www.poz.com/articles/hiv_virxsys_vaccine_761_19211.shtml

Filed under: HIV and AIDS, HIV Treatment, Medical and Research, Uncategorized, , ,

POZ Magazine: New Computer Modeling System Predicts Which HIV Combos Are Best

Researchers in London announced October 6 the launch of a free-of-charge, online computer modeling system to help providers choose the antiretroviral (ARV) combinations that will most likely work for their patients.

For people starting their first ARV regimen, the choices are usually pretty clear. Given that all of the combinations recommended by the Department of Health and Human Services HIV treatment guidelines panel have proved effective at controlling HIV, the choice usually comes down to which combination will be easiest to take and have the least troubling side effects.

For people who are on their third, forth or fifth regimens, however—or those who are infected with drug-resistant HIV—treatment decisions can be challenging. Currently, providers must sort through the often complex results of genotype tests, which identify the drug-resistant mutations a person’s HIV carries, along with a person’s treatment history to determine what combinations are most likely to work. In the most complex cases, providers often consult with resistance experts at university academic centers.

Now, a group of researchers belonging to a non-profit group called the Response Database Initiative has launched a new online computer modeling program to help providers make more accurate predictions about the best regimens for their patients. Called the HIV Treatment Response Prediction System (HIV-TRePS), the system uses computer simulations based on the medical records of over 70,000 people with HIV around the world to determine which treatments will be best for a specific individual.

To use the system, a provider enters a person’s genotypic test results, viral load, CD4 count and treatment history. Within seconds, the system returns to the provider a list of potential combinations, sorted by their potency and tolerability.

“This is a very exciting development—the system literally puts the experience of treating thousands of different patients at the doctor’s fingertips,” commented Julio Montaner, MD, from the BC Centre for Excellence in HIV & AIDS in Vancouver. “This has the potential to improve outcomes for people living with HIV and AIDS around the world, particularly where resources and expertise are scarce.”

HIV-TRePS is only about 78 percent accurate in its predictions, and its developers caution that it should not be substituted for expert medical guidance. It has, nevertheless, proven more effective than other available methods, which have about 54 percent accuracy, for predicting which regimens will be most likely to work.

“We are really excited about the launch of this system, which is a milestone for us, our research partners around the world and also for the use of bioinformatics in medicine,” said Brendan Larder, PhD, scientific chair of RDI. “We believe this approach can make a significant difference in a variety of settings and diseases.”

Source: http://www.poz.com/rssredir/articles/hiv_resistance_treps_761_19217.shtml

Filed under: HIV and AIDS, HIV Treatment, Medical and Research, , , ,

POZ Magazine: Considering Cannabis – e.g. USA

In states where it is legal, medical marijuana helps some HIV-positive people cope with living their lives.

In the states of California and Washington, since 1996 and 1998, respectively, medical marijuana has been legally available for people with HIV, cancer and other serious health challenges. Heading west this past spring from my home in Connecticut, I set out to learn about the states’ medi-pot programs. Okay, I admit it. I also hoped to score a bit of medicine, too.
Nationally, 14 states plus the District of Columbia allow medical marijuana use. Most of these consider anyone with HIV/AIDS eligible for medical pot. Many HIV-positive people use marijuana to treat nausea, appetite loss, the pain of neuropathy, chronic bowel problems and even anxiety. “When appropriately prescribed and monitored,” the American Academy of HIV Medicine stated in 2007, “marijuana/cannabis can provide immeasurable benefits for the health and well-being of our patients.”

So it is not surprising that some people with HIV use marijuana for medical purposes, whether it’s legal or not. And a whopping 89 percent of the men participating in the long-term Multicenter AIDS Cohort Study (MACS) acknowledged using pot, though they weren’t asked whether it was legally obtained.  In Seattle, I interviewed Robert Wood, MD, recently retired AIDS chief for the Seattle/King County public health department. Based on his experience, which dates to the early 1980s, Wood said pot helps many positive people in the aforementioned ways. And while it seems to help some people sleep, he noted, it can have the opposite effect for others.  John Moore, a San Francisco man living with HIV since 2004, told me his doctor recommended pot to treat lipoatrophy. “Weed does not help lipoatrophy [a condition that results in loss of body fat], OK?” he said, fairly winking. But it can alleviate the emotional impact of lipo and other HIV side effects. “It provides a sense of well-being and allows me to get away temporarily from anxieties,” Moore said. “Some would say it’s an illusion, but so what? I think we should be looking at it like any other medicinal substance.”

Indeed, the placebo effect can be useful. As Josiah Rich, MD, professor of medicine and community health at Brown Medical School at Providence, Rhode Island, said: “Whether the benefit is from marijuana or from the belief that it is helping, it has a real effect for some people suffering from symptoms related to HIV or HIV meds.”  The road to legalization has been long. In 1999, the Institute of Medicine, which advises the federal government on scientific matters, asserted “the potential therapeutic value for cannabinoid drugs.” But it took until last year for the American Medical Association to sign on. Moreover, federal law still outlaws marijuana. But in 2009, the justice department directed prosecutors to lay off people using medical cannabis in states where it’s legal. In San Francisco, the city instructed the police department not to arrest people for having medical marijuana. Apparently, the directive worked. “I get on the bus in the morning,” Moore said, “and the whole thing reeks of weed because so many people are carrying it.”
Unfortunately for me, California, like all the other medical pot states, limits the use of legal marijuana to state residents. Only a few states offer reciprocity for visitors from other legal-marijuana states who run out of medicine.
Obtaining medical pot is a pretty standard process for residents of the states offering it. First, you need a doctor’s medical recommendation (not a prescription). If having HIV isn’t enough, your doctor will want to know what specific ailments you are trying to address.
The referral—and a fee, ranging from $100 in Michigan to $150 in Nevada—will get you a one-year, state-issued ID card, usually from the state health department. Some states have dedicated medical pot offices, such as Vermont’s Marijuana Registry. The ID card allows you to avoid arrest and—important for people with compromised immune systems—avoid low-quality marijuana, possibly mixed with mystery compounds. You might pick up your new medicine in a state-licensed dispensary or “compassion center,” as Rhode Island calls them. In most states, a license also entitles you to grow a limited amount of pot. (See sidebar for further details.) Moore described the San Francisco dispensary he uses as a trailer-type building—like a teashop, but with bulletproof glass. “Behind [that] glass,” he explains, “is a woman sitting with a cash register. A white board on the wall lists what they have. Then there are big jars with different types [of cannabis]”—bearing names such as Purple Haze and White Widow. “Everything is priced by an eighth of an ounce,” Moore said. Prices are as high as $60 for high-quality grass, to a mere $20 for what’s commonly called “shake,” the stems and seeds that can be added to melted butter to make a spread. Insurance companies and third-party payers won’t (yet?) pay for medical marijuana, so it’s all out of pocket.

I didn’t see the dispensary, but Moore did take me into a smoke shop on 18th Street, half a block from the intersection of Castro, and pointed out the shelf of vaporizers. Instead of smoking, he uses one of these. “You put the weed in this little mesh chamber at the end of a short hose,” he said. “And you attach that above a heating element that heats but does not burn the herb, then inhale from the other end.“  Smoking pot can harm the lungs, the Institute of Medicine first warned in 1999. In contrast, vaporizers produce “little or no exposure” to the unhealthy chemicals smoking generates, including carbon monoxide and benzene, according to University of California at San Francisco researchers, led by longtime HIV and cancer doctor Donald Abrams, MD. What’s more, they found that a vaporizer produced higher plasma levels of THC (tetrahydrocannabinol, marijuana’s 
active ingredient) than smoking. Back in Providence, in his HIV clinic, Josiah Rich recommends a vaporizer to avoid lung damage. “But,” he adds, “smoking small amounts is not unreasonable.” In the name of research, I tried a vaporizer. As promised, the device eliminates the coughing and irritation associated with smoking weed. Beyond the known risks of smoking, there’s been at least a squeak of a warning about cannabis for people with HIV—from a “humanized” mouse. Researchers at UCLA infected a specially engineered mouse with an HIV-like virus, then gave it THC. They concluded the cellular damage they observed could mean that THC might slightly speed up the progress of untreated HIV. But Abrams found that neither smoked nor synthetic THC—dronabinol, in prescription Marinol tablets—affects viral load or interacts with HIV meds. In fact, he said, the research shows that marijuana “actually improved immune function after 21 days of smoking three times a day.” And so far, no other research has confirmed those mousy data. All medications have side effects and trade-offs. For example, the side effects of the HIV meds I take are diarrhea, headache, nausea, stomach pain or upset, tiredness, vomiting and weakness. By contrast, marijuana, whose most common side effect is “euphoric mood,” stacks up amazingly well.
Source: http://www.poz.com/articles/Medical_Marijuana_HIV_2521_18907.shtml

Filed under: HIV and AIDS, HIV Treatment, Medical and Research, Politics and Society, , , , , ,

POZ Magazine: NIH Awards $2.5 Million to Study Latent HIV

The National Institute on Drug Abuse (NIDA) in the USA, part of the National Institutes of Health (NIH), has announced Eric M. Verdin, MD, as the winner of the Avant-Garde Award for HIV/AIDS Research, according to an NIH statement. Verdin’s research will focus on developing new technology to explain how HIV latency is established and maintained and how it becomes reactivated. The goal is to eliminate latent HIV infection. The award grants Verdin, of the J. David Gladstone Institutes in San Francisco, $500,000 per year for five years.

To read the NIH statement, click here.

Source: http://www.poz.com/rssredir/articles/Latent_HIV_Study_1_19096.shtml

Filed under: HIV and AIDS, HIV Treatment, Medical and Research, , , ,

E-Health News: Strike threatens lives’ of AIDS patients

Source: http://www.health-e.org.za/news/article.php?uid=20032909

People taking life-long antiretroviral therapy have been left stranded and are being forced to skip crucial treatment as the public sector strike continues. Hospitals and clinics administering anti-retroviral and tuberculosis treatment have been empty this week, with doors being closed on patients needing the medication. Without this life-saving medication they could easily become sick again. A patient who did not want to be named told Health-e News Service that close to 60 patients on ARVs at the Koos Beukes clinic, in Soweto, were turned away earlier this week. She was among that group. “I was due to fetch my treatment. When I went there it was locked. How can they do that? The nurses always tell us that we should not skip our treatment, now they are the ones’ doing this to us, making us skip our medicine for two weeks. What do they expect us to do? They just want money and they don’t care about us, they need to help us”. The patient’s fear is almost palpable. “I feel very bad. I can’t live without my treatment. It will be a draw-back because it means that my CD4 count will reduce. Then, I’ll die. I don’t want to die. I want to continue living like I am”, she says. Two blood sisters also came for their treatment and could not find it. Luckily, they decided to go to the nearby Chris Hani Baragwanath Hospital’s HIV/AIDS unit where they received help, said one of the sisters. “When we arrived, they told us that they are not working because they are afraid of being threatened by striking nurses since they had been intimidated the day before. They told us to go and didn’t even suggest an alternative place to go to. We decided to come here because without the tablets we won’t survive. A lot of people didn’t get their treatment because only the 3 of us came to Bara. I can only imagine what happened to the others”. The other sister was also relieved that they managed to get their ARV treatment, saying without them the chances of surviving become slim. “This is very hard because when you skip your treatment, even for one day, it becomes very tough. The experience we had there at the other clinic was not good, especially because no one even advised us of an alternative place. We rely on these pills”, she explained. ARV medication is a life-long intervention. A doctor from the Clinical HIV Research Unit at Helen Joseph Hospital says the effects of defaulting on treatment could be detrimental to ones’ life. Dr Francesca Conradie says the danger of skipping treatment may result in making medicines the patients are currently taking useless when they resume taking treatment. “Antiretroviral therapy reverses the damage done to the immune system. It is a very effective therapy. But because the virus mutates so quickly, you have to make sure that our patients don’t miss any tablets. One of the questions asked is: ‘Does a day or two make any difference’? It is very possible that it does. Once a person becomes resistant to a drug, you lose it. It cannot be used again. And if the virus starts to replicate, you lose that drug and the immune system damage can occur. The stakes are very high”. Conradie also expressed concern for pregnant women who have to protect their unborn babies from HIV infection. “The stakes are high for pregnant women because if their virus goes out of control they can transmit their virus to the baby, which is very difficult to treat. I’d say for both her and her unborn baby. We’ve got good medication in this country and an outstanding ARV programme… the biggest in the world…very successful…and we’re going to blow this all into the water by drug interruption”, she says. She has also warned that the strike may have crippling effects on TB patients who may develop drug-resistant tuberculosis if they default on treatment. “It consists of four 4 medicines for the first two months and two medicines for the next four months. If you don’t adhere to that, it’s possible that drug resistance will occur and we call those organisms multi-drug resistant TB. This is more expensive and the cure rate is poorer”.

Filed under: HIV and AIDS, HIV Prevention, HIV Treatment, Medical and Research, Politics and Society, Society and living environment, , , , ,

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