What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected

step 1 Problem are first to discuss about how the acquired immunodeficiency syndrome or AIDS causes def

What is the mechanism by which the AIDS virus causes...

Key Concepts

Human Immunodeficiency Virus (HIV)

HIV is a retrovirus that specifically targets the human immune system. It integrates its genetic material into host cells, primarily affecting critical immune cells, and is responsible for the condition known as AIDS. The virus's specificity for immune cells is key to its ability to disrupt immune function.

CD4+ T Lymphocytes

CD4+ T cells, also known as helper T cells, are central to orchestrating the immune response. HIV preferentially infects these cells, leading to their depletion. Their loss undermines the immune system's ability to coordinate defenses, making the body more susceptible to opportunistic infections.

Viral Life Cycle and Replication Mechanism

The replication cycle of HIV involves binding to CD4 receptors, fusion with the host cell, reverse transcription of its RNA into DNA, integration of viral DNA into the host genome, replication, and eventual release of new virions. This cycle not only propagates the infection but also directly leads to cell death through lysis or apoptosis.

Immune System Impairment

The cumulative effect of CD4+ T cell depletion and widespread viral replication is a progressive impairment of the immune system. As key regulatory and effector cells are destroyed, the body's ability to fight off infections declines, leading to the immunodeficiency characteristic of AIDS.

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