Word: Cluster of Differentiation 4 (CD4)
Part of Speech: Noun
Simple Explanation:"Cluster of Differentiation 4," often shortened to CD4, is a special protein found on the surface of certain white blood cells called helper T cells. These cells are important for the immune system, which helps our body fight infections. CD4 acts like a doorbell for the HIV virus, allowing it to enter these cells, which can lead to health problems.
Usage Instructions: - Use "CD4" when discussing immune system cells or HIV. - In scientific discussions or health-related conversations, this term is commonly used.
Example Sentence: "The CD4 count is an important test for people with HIV, as it shows how well their immune system is functioning."
Advanced Usage: In medical research or discussions about immunology, you might hear about "CD4 T cells" or "CD4 receptor." These terms refer to the specific role of CD4 in helping the immune system work effectively, and its interaction with viruses like HIV.
Word Variants: - CD4 T Cells: Refers specifically to the T cells that have the CD4 protein on their surface. - CD4 Count: A medical test that measures the number of CD4 cells in a blood sample.
Different Meaning: In a non-medical context, the term "CD4" does not have other meanings. It is primarily used in immunology and virology.
Synonyms:There are no direct synonyms for "Cluster of Differentiation 4," but related terms include: - Helper T cells - T lymphocytes
Idioms and Phrasal Verbs:There are no idioms or phrasal verbs specifically related to "CD4." However, in medical contexts, you might hear phrases like "keep track of" (monitoring CD4 counts) or "fight off" (referring to how the immune system uses CD4 cells to combat infections).
Recap: So, "Cluster of Differentiation 4" or CD4 is a vital protein found on helper T cells that plays a crucial role in the immune system and is significant in the context of HIV and other infections.