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Questions tagged [hiv]

The Human Immunodeficiency Virus (HIV) is a single-stranded RNA virus which reproduces in human CD4-positive cells, which are primarily T-helper lymphocytes and macrophages. HIV is the causative pathogen of Acquired Immunodeficiency Syndrome (AIDS).

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What are the potential dangers (if any) facing the twin girls recently born in China with their CCR5 gene modified?

According to this Nature news article, a Chinese researcher claims to have made the world's first genome-edited baby using the popular CRISPR–Cas9 genome-editing tool. A gene called CCR5 was modified ...
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Can people with AIDS/HIV be vaccinated?

If there is no immune system,it seems like vaccines wouldn't do much since there is no adaptive immune system to develop antibodies and memory cells. But can people with AIDS/HIV still be vaccinated? ...
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How do opportunistic infections affect an immunocompromised or AIDS patient?

I mean, everyone knows that AIDS patients don't die of the HIV infection, rather the opportunistic infections. But if HIV only affects T lymphocytes, and destroys them, then that means only cell ...
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How long does HIV take to penetrate the mucosae?

In articles, such as this, the biology of the HIV infection is explained. However, i haven't been able to find any research explaining how long the virus takes to penetrate the cell layer. The article ...
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Do we know that PrEP actually prevents infection, rather than masking it?

Pre-exposure prophylactic treatment (PrEP) for HIV is commonly said to reduce infection rates by more than 75%. Similar treatments for already-infected patient treatments do not cure HIV, but reduce ...
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Finding difference amongst system of equations for HIV

Given the following figure and the following variables and parameters, I have been able to come up with the set of differential equation below the image. My question is how does the system of ...
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CD4+ as Monocytes cell surface receptors

Today in class, our teacher was discussing about the pathogenecity of the HIV virus. He said that the binding between HIV virus and macrophages is done by the interaction between the GP120 of the ...
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Why does HIV chooses the Macrophage cells to infect first?

Upon entering our body HIV directs the macrophage cells to manufacture more virus particles. It injects the Viral RNA into the Macrophages. With the help of the enzyme reverse transcriptase the Viral ...
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why hiv genome not attacked by lysosome in macrophage

HIV cells lifecycle in macrophages suggests the early phase with naked genome entering the macrophage along with reverse trancriptase enzyme. i am thinking that macrophages are abundant with lysosomes ...
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Are these statements about the effectiveness of condoms in preventing HIV transmission reconcilable? [closed]

Can the following statements be reconciled: Condoms form an essentially impermeable barrier to HIV Sexual activities other than penetration carry a very low risk of transmission The consistent use of ...
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T lymphocytes and HIV-AIDS

in studying maturation of lymphocytes into two different types-T LYMPHOCYTES and B LYMPHOCYTES. it is mentioned that if a lymphocyte matures in thymus gland it becomes T LYMPHOCYTE and becomes B ...
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Why HIV need integrase enzyme to integrate their DNA into host cell?

In gene transfer by microinjection, the gene of interest is injected into the nucleus of host cell without using integrase enzyme. So why does HIV need that enzyme? Why they not just place their DNA ...
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Can we detect rabies during its incubation period?

Although some diseases are almost fatal and have a near 100% mortality, their incubation period can be very long. For example, rabies' incubation period can be days to years. I wonder when the ...
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How did scientists discover HIV?

Imagining that we're now in 1983 (when HIV was discovered), there were no modern machines at that time to sequence massive genome extracted from blood. There was a strange disease and no one know what ...
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Meaning of “U” in “Viral Protein U”

What does U mean in Viral protein U? Viral protein U (Vpu) is a unique gene product of human immunodeficiency virus (HIV) type 1 (HIV-1) with two well-described functions... So does U in this case ...
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Is Berlin patient immune to HIV after bone marrow transplant? [closed]

Is the Berlin patient here : https://biology.stackexchange.com/a/39364 become immune to HIV after bone marrow transplant? Or in other words: Can he get HIV infection again?
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Can HIV be automatically cured by waiting until CD4 T cells count drop to 0?

As I know, HIV needs host cell, CD4 T cell to repicate itself, and at late stage of AIDS, count of this cell in patient will drop to 0, my question is, if we can provide a sterilised environment for ...
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Does body compensate for T-cell death caused by HIV

Some Chemotherapy drugs targets and kills White Blood Cells too. But after a few weeks, WBCs level up. My question is, doesn't body compensate for CD4+ T cells death caused by HIV ?
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How is TB harmful in HIV patients?

The mycobacterium of TB doesn't secrete any toxins. The cause of disease in the immunocompetent is the collateral damage due to the immune response against disseminated infection. But then, when HIV ...
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How much time does HIV live outside the body? [closed]

I'm wondering HIV viability outside the body of an infected person, for example in a knife that contains blood of an infected person, with N virus cells. (N could be for example, 1000). Some virus ...
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Do HIV particles die without host cells?

When a person is on antiretroviral therapy (ART) which blocks HIV particles from infecting cells, where do those particles go? Do they die out while floating in the bloodstream? I particularly want to ...
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Effect of HIV on T-cells

When HIV infects macrophages, it doesn't kill or destroy them immediately, but once it infects T-cells, they're destroyed. Why is that? As in why does it destroy T-cells and not macrophages or other ...
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Can HIV be transmitted via mosquitos?

It is known that HIV is usually transmitted by direct blood or body fluid contact between an infected individual and a healthy person (like blood transfusion or needle sharing): Suppose a mosquito ...
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Why is HIV so large compared to other viruses?

The HIV-1 virus is about 120-150 nm in size and has a genome only about 10,000 base pairs long. Other viruses are far more efficient, for example lambda phage has something like a tenth the volume ...
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Why is HIV associated with weight loss/being underweight? [closed]

It seems that people with HIV are often underweight, is there something (or multiple things) which cause HIV sufferers to lose weight? What is happening within the body as a direct effect of HIV that ...
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In the life-cycle of the HIV virus, how does the created DNA enter the nuclear membrane?

I am in a high school biology class, so I cannot truly attest to how accurate the information I am given is, but as far as I know only RNA and very small molecules can enter the nuclear membrane ...
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Why is AIDS not a congenital disease?

AIDS can easily pass from mother to the newborn, then why do we not consider it to be a congenital disease (or syndrome)
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How is HIV evolutionarily viable despite its extreme virulence?

How does HIV survive natural selection? And how has it managed to kill far more than any non-airborne virus in recorded history?
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Engineered CD8 T-cell therapy for HIV infection

CD8 T-cells are effective in controlling HIV during the early phase of the infection. However by the time, the virus mutates and develops an evasion mechanism against CD8 T-cells. Since cancer cells ...
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What are the effects of removing CD4 receptors?

If the gene for the CD4 receptor was removed, would the person's immune system work normally? Could a new artificial receptor be substituted in place of CD4? Could HIV infection be prevented in this ...
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HIV and open reading frames

In Wilk et al. 2001 I saw that HIV has 3 open reading frames. In the Watts et al. 2009, I noticed they mentioned HIV has 9 open reading frames. I don't understand this very well. e.g. ...
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Why does HIV belong to a group of retroviruses called lentiviruses?

HIV is an enveloped retrovirus. Each virus particle contains two copies of an RNA genome. The virus also has a number of enzymes: reverse transcriptase, integrase and viral protease. But, once I also ...
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Transmission of HIV from Mother-to-Child Through Breastfeeding

If a mother is HIV+ and was on medications which would help her deliver a HIV negative baby, can the baby contract the HIV through her breast milk?
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Can people with AIDS get a fever?

It's my understanding that fevers are an immune system response to infection. Like the body's cells can take more heat than most viruses or bacteria. So if that's the case then can you even get a ...
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An alternate cure for AIDS?

Is is possible to cure AIDS patients by using white blood cells of blood cancer, by fooling HIV to attack a false target? Is it possible to wrap HIV in a physical boundary, such that it has no ...
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Why is an HIV infection considered “incurable”?

My biology teacher told me that if one caught HIV, they cannot be cured because it was near to impossible to be completely virus-free. She said this was because HIV keeps on changing its glycoprotein ...
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Why do doctors still advise HIV+ couples to wear a condom during sex?

HIV infected people already have HIV, but why do doctors still advise condom use for HIV+ couples?
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Is there a way to prevent an HIV infection after exposure to HIV infected Blood?

If a person is accidentally injected with blood from an HIV+ person, is there a treatment option that can keep the person from developing an HIV infection?
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Can people with AIDS get tattoos?

When I do a Google search, most of the results are about whether or not people can get HIV / AIDS from getting a tattoo through dirt needles. I am, however, curious whether or not it is possible to ...
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Can HIV mutate to become airborne?

HIV has a very high mutation rate due to its inability to correct errors in DNA replication and it is very adaptable to its environment. Hence I wonder whether is it possible for it to mutate such ...
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Can we use the HIV antibody test to detect HIV in newborns? [closed]

Adults and elder children can use HIV rapid test to test HIV infection. Can we use the HIV antibody test to detect HIV in newborns too?
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Reasons for the HIV-1 epidemic

So, the HIV-1 jump to humans occurred as early as the 1920s, but the AIDS epidemic didn't start until the early 1980s. Some things I don't understand about this: Why the delay? What is needed for a ...
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Why AZT is selective towards HIV and doesn't impair human DNA replication?

I've found this article, which is a very old one (from the time when nucleoside analogs where researched as a possible way to prevent replication of virus genetic material, before the HIV epidemics). ...
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How does HIV mutate into other strains while keeping their virulent phenotype?

How does a virus like HIV mutate into so many strains, and yet all of them are harmful to our immune system? What gives this virus the ability to mutate so efficiently?