Treatment of multiple carboxylase deficiency –
**Core Concept**
Multiple carboxylase deficiency is a rare genetic disorder characterized by impaired activity of biotin-dependent carboxylases, leading to increased levels of propionic acid and other organic acids in the blood. This condition is often associated with biotinidase deficiency, a deficiency of the enzyme biotinidase, which is responsible for recycling biotin in the body.
**Why the Correct Answer is Right**
The treatment of multiple carboxylase deficiency involves administering high doses of biotin, which is a coenzyme for the affected carboxylases. Biotin supplementation helps to alleviate the symptoms of the disorder by increasing the levels of biotin in the body, thereby enhancing the activity of the biotin-dependent carboxylases. This treatment approach is based on the understanding that biotin is an essential cofactor for these enzymes, and supplementing with biotin can help to compensate for the deficiency.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because vitamin B12 is not directly involved in the treatment of multiple carboxylase deficiency.
**Option B:** This option is incorrect because folic acid is not a suitable replacement for biotin in the treatment of this disorder.
**Option C:** This option is incorrect because thiamine is not directly related to the treatment of multiple carboxylase deficiency.
**Clinical Pearl / High-Yield Fact**
It is essential to note that biotin supplementation is a crucial aspect of managing multiple carboxylase deficiency, and patients with this disorder require lifelong biotin therapy to manage their symptoms effectively.
**Correct Answer: D. Biotin supplementation is the recommended treatment for multiple carboxylase deficiency.**