For which of the following diseases is enzyme replacement therapy available –
**Core Concept**
Enzyme replacement therapy (ERT) is a treatment approach that involves administering a deficient or missing enzyme to patients with genetic disorders. This concept is relevant to the field of medical genetics, where inherited conditions often result from enzyme deficiencies.
**Why the Correct Answer is Right**
ERT is particularly useful for conditions where a specific enzyme is deficient, leading to the accumulation of toxic substances or the inability to break down certain substances. For instance, in Pompe disease, a deficiency of acid alpha-glucosidase (GAA) enzyme leads to the accumulation of glycogen in lysosomes, causing cellular damage. Administering recombinant human GAA enzyme helps alleviate symptoms by breaking down glycogen.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because enzyme replacement therapy is not a standard treatment approach for this condition. The correct treatment often involves other modalities such as surgery or medication.
**Option B:** This option is incorrect because, although enzyme replacement therapy is available for some lysosomal storage diseases, this specific condition is not typically treated with ERT.
**Option C:** This option is incorrect because this condition is primarily treated with medications that manage symptoms, rather than enzyme replacement therapy.
**Option D:** This option is incorrect because this condition is often treated with surgery or other interventions, rather than enzyme replacement therapy.
**Clinical Pearl / High-Yield Fact**
ERT is a valuable treatment option for conditions where enzyme deficiencies are the primary cause of disease. It is essential to recognize the specific enzyme deficiencies associated with various genetic disorders to provide optimal care.
**Correct Answer:** C.