Biological product, alpha-1 - antitrypsin is used for the treatment of which of the following diseases? - KPSC Staff Nurse - 2018

KPSC Staff Nurse - 2018

Pharmacology

Easy

Appeared in: KPSC Staff Nurse - 2018

Explanation

Alpha-1 antitrypsin (AAT) is a protein that functions as a protease inhibitor, primarily protecting lung tissue from the enzyme neutrophil elastase.
A genetic deficiency of AAT leads to unopposed elastase activity, which destroys the alveolar walls, causing panacinar emphysema.
Treatment for AAT deficiency-related lung disease is augmentation therapy, which involves intravenous administration of the AAT biological product.
This therapy slows the progression of lung destruction but does not reverse existing damage.

Option A: Cancer is a disease of uncontrolled cell growth. Its treatments (chemotherapy, radiation, immunotherapy) target malignant cells, a mechanism completely unrelated to the function of alpha-1 antitrypsin.
Option C: Cystic fibrosis is a genetic disorder affecting the CFTR protein, leading to thick mucus secretions. While it is a genetic lung disease, its pathophysiology is distinct from AAT deficiency and it is treated with CFTR modulators and airway clearance, not AAT.
Option D: Phenylketonuria (PKU) is an inborn error of metabolism where the amino acid phenylalanine cannot be broken down. The cornerstone of treatment is a lifelong low-phenylalanine diet. It has no connection to protease inhibitors or lung disease.

Clinical Relevance

Nursing practice connection: Knowing Pharmacological treatment for genetic disorders helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses administering AAT augmentation therapy must monitor patients for infusion-related reactions, including fever, chills, and potentially life-threatening anaphylaxis. Emergency medications should always be available.
Patient education is a critical nursing role. It is vital to counsel patients with AAT deficiency on the absolute necessity of smoking cessation, as smoking drastically accelerates the progression of emphysema.
Nurses should also ensure patients are up-to-date on vaccinations, particularly for influenza and pneumococcus, to prevent respiratory infections that can exacerbate lung damage.

How to Approach the Question

First, identify the key term in the question: 'alpha-1 - antitrypsin'.
Recall or deduce the function of this substance. The name 'anti-trypsin' suggests it is an inhibitor of a protease (an enzyme that breaks down proteins).
Consider the options provided. Emphysema is a disease characterized by the destruction of lung tissue.
Connect the function of a protease inhibitor (AAT) to a disease of tissue destruction (emphysema). A lack of the inhibitor would logically lead to tissue destruction.
Evaluate the other options. Cancer, cystic fibrosis, and PKU have well-known but distinct pathophysiologies that do not involve a primary deficiency of AAT.
Conclude that AAT is used to treat emphysema caused by its deficiency.

Concept Tested & Keywords

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