ADMIN
(0 comments, 229 posts)
This user hasn't shared any profile information
Posts by ADMIN
Simulations Provide Valuable Insight for HIV Research
8 years ago
by ADMIN
in HIV Management
A new study has used simulations to follow how HIV infects the body.
It has become increasingly important for scientists to understand the life cycles of viruses such as HIV, Zika, and Ebola. Learning how these microbes develop aids researchers in their quest for effective vaccines and treatments. Interrupting the vital processes is one way to curb or halt infection. Efforts to probe deeper into the maturing of HIV has yielded helpful insight.
Watching HIV Mature Through Computer Simulations
Computer simulations of HIV were used to follow the maturing process of the virus to see how it infects the host. The biological system that was computer simulated broadened understanding, and possibly hastened the production of more effective antiviral drugs. While the simulations are not real life, scientists admit it comes very close to predicting actual events. Identifying stages of viral maturation is significant to researchers. With the computer-generated model, two main aspects of this process were identified.
Observing the Processes
The capsid is a protein-derived capsule that is crucial to viral development, and correlates to its ability to infect a host. They observed how it is formed, and that it contains the virus’ genetic material. When the virus infects a cell, a bud is formed on the surface of that cell. Within this particle are proteins and genetic material. This bud will break free and travel through the body. During this traveling time, the proteins are broken up. The resulting pieces pair up, and as they do, the capsid is formed and surrounds the RNA.
As this process occurs, there is constant motion and flipping around. According to researchers, this happens so that proteins are correctly oriented when they pair up, and it helps control the rate of the building process.
The complexity of these described processes had to be simplified for the simulations. However, the more information that can be gathered and programmed into the computer models, the more exact they become. Scientists are confident that similar models could be observed for other types of viruses that also have a capsid. The Ebola and Zika viruses are both included in this category. With enough information and understanding, developing ways to effectively treat these resilient infections may become possible in the future.
Using Antibodies in an Attempt to Find a Vaccine
8 years ago
by ADMIN
in HIV Vaccination
Scientists hope to develop a cure for HIV by researching successful antibodies.
The human immune system is a fascinating network capable of performing incredible feats. Even when HIV is involved, nearly one-third of individuals are capable of producing effective antibodies against the virus. Researchers have turned their attention to the antibodies produced during infection in order to facilitate the creation of an effective vaccine.
While some immune systems are adept at producing antibodies that act to neutralize a broad range of HIV strains, the process could, and often does, take up to a year before it is in full swing. Ideally, a vaccine should help a patient immediately combat the viral intrusion. This is one important goal for those developing vaccines. Efforts to speed up the process and make the antibodies available for everyone has prompted scientific study.
Certain effective antibodies were selected and closely examined. Of those, some had loop-like structures which, when they encountered the virus, were able to cling tightly and neutralize it. With the aid of computer modeling, modifications were made to the existing antibodies so as to maximize their efficiency. It is expected that such modifying will help increase the response time of the immune system, even if a person has never previously had contact with HIV.
Amino Acids Within Antibodies
Another aspect that was carefully reviewed was how the amino acids were sequenced in the antibodies that had proven most effective. Of the antibodies with a loop structure, certain ones had specific amino acid sequences that researchers tested and noted. A successful vaccine needs to provide adequate protection against more than just one or two strains of the tenacious virus. Those that were able to neutralize more strains were again plugged into the computer and modified. The re-engineering was to increase the capabilities of these powerhouse molecules.
Tests were also conducted to confirm that the alterations being made would, in fact, prove effective. The spectrum that the vaccine is designed to cover is wide, and when factoring in the potency of the design, researchers feel confident that if implemented, most people who are vaccinated would produce an effective response.
HIV and Bone Loss in Infected Young Men
8 years ago
by ADMIN
in HIV Research
New research shows that bone loss is prevalent in HIV positive young men.
Certain physiological occurrences are expected for patients who are infected with HIV. Bone loss is one of the effects that tops the list. It has been documented that those with the disease are more likely to present with fractures than someone who is not HIV-positive. High rates of osteoporosis and osteopenia are not new. However, recent research shows a discrepancy between the sexes in this matter. Further investigation revealed some information that could prove helpful for physicians as they treat HIV-positive individuals.
The most noticeable difference is the percentage of men versus the percentage of women who present with osteoporosis or osteopenia. Men actually have a much higher rate of the condition than women. It is estimated that 90% of HIV-infected men have bone loss while females with HIV come in around 60%.
HIV causes chronic inflammation due to disruption and dysfunction of the immune system. Antiretroviral therapies also add to the body’s burden of maintaining bone mass. These conditions are known to slowly erode bone. Studies show that in preteen and teenage males, there is an increase of what is called macrophages. These white blood cells, when found in the bone, are responsible for resorption during remodeling of the bone when it is continuous.
Predicting and Preventing Bone Loss
Digging a bit deeper, the more of these specialized cells there were, the less dense the bone material proved to be. If the production of the macrophages increases, it seems to indicate bone loss. It is hoped that with this information, newly infected patients can be watched for these types of changes, and thereby the amount of bone lost can be reduced.
For the feminine side, chronic inflammation generally is more prevalent in females. However, due to the presence of estrogen, the rate of bone loss is lessened. Estrogen acts as a shield against some of the inflammation. Estrogen is also effective at blocking the production of macrophages. These two properties together seem to account for the lower figures of bone loss in females when compared to males.
Link Between HIV and Zinc Deficiency
8 years ago
by ADMIN
in HIV Research
Living with HIV while on antiretroviral therapy usually means that an individual will have or will experience secondary conditions. Quality of life and overall life expectancy have continued to rise, yet there is room for improvement. This is especially the case when certain conditions can signal progression in the disease – such as zinc deficiency and inflammation.
Inflammation and HIV
Inflammation is an immune response that can become overactive with HIV treatment. Efforts to understand what causes this to happen, and how to reduce the inflammation, have been the focal point for a number of research projects around the world. One particular study linked a lack of zinc to higher rates of inflammation.
Zinc Deficiency and Inflammation
The study helped to link a deficiency in the nutrient zinc—a condition that is commonly found in those who are HIV-positive—and inflammation. Through a close examination of hundreds of patients with HIV who are on antiretroviral therapy, they were able to acquire information specific to this topic. Rigorous gathering of statistics, diet information, blood samples, interviews, and other samples was necessary to confirm the findings.
Certain biomarkers used to identify inflammation can be used to analyze the progression of the condition. One of those markers relates to zinc. The higher the concentration of the marker, the less zinc there was. This deficiency could help with gaining better control over the effects of the infection. If confirmed that this is the case, it could lead to relieving some symptoms from sufferers and improve quality of life. Scientists are also hoping that other groups would likewise benefit from these results.
More Questions About Zinc Deficiency Than Answers
While the link between the biomarker and the lack of zinc are clear, a few questions were raised. For one, researchers are not sure if the inflammation is caused or aided by the lack of zinc. It could be that zinc deficiency is the result of the inflammation. Along with these issues, there are some doubts that simply increasing zinc in one’s diet would help rectify the problem. In order to be conclusive, more information is needed.
How Viruses Working Together Affect Your Health
8 years ago
by ADMIN
in HIV Research
Much can be accomplished with a team effort. This is true for most of the natural world. By forming networks and through communication, teamwork is seen in all walks of life, even in microbes. Viruses are included in this phenomenon.
Some years back, it was discovered that viruses do interact with each other. Recent studies are showing that this interaction plays a large role in the success of treating the infection. Researchers are hoping that with further study and clarification on the details, new treatments could be developed that will prove even more effective.
How Viruses Use Colonies to Resist Treatment
One study recently published its findings on the subject of viral diversity and social interaction. For a viral infection to take hold, a colony is formed. With HIV, this is also true. Once formed, the colony that resists treatment is normally the one with the most genetic diversity. The more mutations found within the colony, the better chance the virus has of becoming immune to drug therapy. Basically, diversity leads to a stronger hold on the host.
This is not good for the patient or the medical professionals who are trying to treat him or her. It does, however, help to explain why some treatment does not work as effectively as expected. Before, a drug was designed to focus on a single cell. Trying to treat an infection this way leaves out the potential for variants within the infection.
This brings us to the next point. When the viruses interact with each other, they form certain connections. Understanding how and why they communicate could unlock certain secrets that, in turn, could lead to better treatments—or even an eventual cure.
Changing the perspective on how to treat a viral infection, whether HIV, hepatitis A, or others, could help researchers find even more effective ways of eradicating a virus. When taking into account the virus’s social abilities along with the diversity it promotes, scientists become better equipped to handle the problem. Further investigation on such matters is underway.
