In Gaucher’s diseases, there is deficiency of?
**Core Concept:**
Gaucher's disease is a group of inherited lysosomal storage disorders caused by deficiency of certain enzymes. In this case, we are focusing on the deficiency of glucocerebrosidase, also known as beta-glucosidase. This enzyme is responsible for breaking down ceramides, a type of fat molecule, in the lysosomes of cells.
**Why the Correct Answer is Right:**
Gaucher's disease is a result of mutations in the GBA gene, which codes for glucocerebrosidase enzyme. This enzyme is essential for the proper functioning of macrophages, specifically in the spleen, liver, and bone marrow. Its deficiency leads to the accumulation of ceramides, causing cellular dysfunction and tissue damage.
**Why Each Wrong Option is Incorrect:**
A. Glucosidase acid is another enzyme involved in lysosomal degradation but is not affected in Gaucher's disease.
B. Lysosomal storage disorders are caused by deficiency of multiple enzymes, not just one.
C. Lipid disorders are unrelated to Gaucher's disease, which is an enzyme deficiency disorder.
D. Acid phosphatase is another enzyme involved in lysosomal degradation but is not affected in Gaucher's disease.
**Clinical Pearl:**
Gaucher's disease can manifest in three main types: Type 1 is the most common and has non-neuronopathic features; Type 2 and 3 are severe and rapidly progressive forms with neuronopathic features. Early diagnosis and treatment are crucial in managing this disease and preventing severe complications.
**Correct Answer:** D. Glucocerebrosidase (beta-glucosidase)
**Why the Correct Answer is Right:**
In Gaucher's disease, the deficiency of glucocerebrosidase leads to the accumulation of glucosylceramide, which causes macrophage dysfunction and tissue damage. The correct answer is option D because it represents the enzyme that is deficient in Gaucher's disease.
**Why Each Wrong Option is Incorrect:**
A, B, and C are not the enzyme deficient in Gaucher's disease and thus are incorrect. Acid phosphatase is another enzyme involved in lysosomal degradation, but it is not affected in Gaucher's disease.