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A 28-year-old male asked:

What is the definition or description of: cd4?

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Dr. Alan Ali
Dr. Alan Alianswered
Psychiatry 32 years experience
CD4: Is a glyco protein found on surface of immune cells such as monocytes, macrophages & dendritic cells. It assists t-cell receptors in communicating with an antigen-presenting cell, hewnce facilitating entry of HIV virus into the cell. Measuring the CD4 count is used to determine prognosis in HIV treatment.

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Last updated Feb 13, 2015

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