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What is the function of CD4?

Updated: 4/28/2022
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CD4 is a surface receptor expressed by helper T lymphocytes, known as CD4+ T cells. Its purpose is to stablize the interaction between the T cell receptor (on the T cell) and an antigen-bearing MHC Class II molecule (on an antigen presenting cell).

Under the right circumstances, this interaction activates CD4+ T cells that recognize an invading pathogen. Activated CD4+ T cells do many things, and are required for a robust adaptive immune response.

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Q: What is the function of CD4?
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Related questions

Is a CD4 molecule also a type of antigen?

CD4 is a glycoprotien expressed on the surface of Helper T Cell


Why only cd4 ceels are damaged in hiv n cd8 remain safe?

coz CD8 and CD4 are two diffrent types of proteins .. n HIV requires cd4 to fuse for replicatin


How do you calculate and absolute cell count?

The CD4 count is the result of the most important test used to monitor HIV. The 'absolute' count is the same as the CD4 count. This is the result you get back from your doctor. The term 'absolute' is used to differentiate it from CD4 percentage (CD4%) which can also be used for clinical management.


How many CD4 T cells do we have?

500 cells/mm3 to 1,000 cells/mm3 CD4 T cells


What causes low CD4 counts?

Your CD4 count is a marker of the strength of your immune system. Many immune related diseases can cause your CD4 count to drop, as can medications that are designed to suppress your immune system. With HIV, the CD4 count falls because it is unable to keep up with the pressure from the virus replicating.


What does the viral load and CD4 count indicate?

The viral load is a measure of how much HIV is present in the blood. A high viral load count would indicate the person has many copies of the virus in their body. The CD4 count, on the other hand, indicates how many CD4 or T-helper cells the person has. CD4 cells are part of the immune system. When they are destroyed, their numbers drop. This is what the HIV virus does--it destroys CD4 cells. Therefore, if a person has a low CD4 count, that means that their immune system is not functioning well, if at all.


CD4 full words of this abriviation CD4?

The CD stands for 'cluster of differentiation' and is way to categorise some of the cells that are part of your immune system. CD4 is T-cell and is the most important immune marker for monitoring HIV.


What is the best prescribed nedicatin for an HIV positive person with 512 cd4 count?

Person with 512 cd4 count he or she HIV positive


Can my CD4 count increase without mediction?

That is unlikely, since the HIV virus directly attacks the CD4 cells. In time, the virus will destroy all CD4 cells. Without medications, that will happen sooner rather than later.


What is the role of CD4 receptores in HIV infections?

The role of the CD4 receptors in HIV is so that the virus fuses with the T helper cells.


What does HIV target the production of?

helper T cells


What a low cd4 cell count?

A low CD4 cell count typically indicates a weakened immune system, often due to conditions like HIV or other infections. CD4 cells play a critical role in the immune response, so a low count can make the body more vulnerable to opportunistic infections and illnesses. Monitoring CD4 cell counts is important in managing conditions that affect the immune system.