Question

Interferon-\(\alpha\)-2a protein is used for the treatment of :

• A. Hepatitis B
• B. Rheumatoid arthritis
• C. Stimulates production of platelets
• D. Stimulates red-blood-cell production

Hint:

To remember interferon therapies: Type I interferons (\(\alpha\) and \(\beta\)) are generally Antiviral.
IFN-\(\alpha\) is used for Hepatitis B and C. IFN-\(\beta\) is famously used to treat Multiple Sclerosis.

Answer 1

The Correct Option is A

Step 1: Concept:
The question requires identifying the primary clinical application of the recombinant therapeutic protein Interferon-\(\alpha\)-2a.

Step 2: Step-by-step Explanation:

• Interferons are a group of signaling proteins (cytokines) made and released by host cells in response to the presence of several viruses. They fundamentally "interfere" with viral replication.

• Interferon-\(\alpha\)-2a (Option A): This is a specifically engineered recombinant variant of Type I interferon. Clinically, it is heavily prescribed as an antiviral and antineoplastic agent.

• Its most prominent application is in the treatment of chronic viral hepatitis, specifically Hepatitis B virus (HBV) and Hepatitis C virus (HCV) infections.

• It acts by binding to specific cell surface receptors, triggering a complex intracellular cascade that induces the expression of enzymes like Protein Kinase R (PKR) and RNase L, which collectively halt viral RNA/DNA replication and degrade viral genomes.

• Rheumatoid arthritis (Option B): This is an autoimmune inflammatory condition. Treatments typically include immunosuppressants and TNF-alpha inhibitors (like Infliximab or Adalimumab), not antiviral interferons.

• Stimulates production of platelets (Option C): The protein used to stimulate platelet production (megakaryopoiesis) is primarily Thrombopoietin or drugs like Oprelvekin (IL-11).

• Stimulates red-blood-cell production (Option D): The hormone responsible for erythropoiesis is Erythropoietin (EPO), widely used in managing anemia.

• Therefore, only Option A correctly correlates with the medical use of Interferon-\(\alpha\)-2a.

Step 3: Final Answer:
Interferon-\(\alpha\)-2a is used clinically to treat Hepatitis B.