Mechanism of action of amphotericin B:
**Core Concept**
The mechanism of action of **amphotericin B** involves interacting with **ergosterol**, a critical component of fungal cell membranes. This interaction is crucial for its antifungal effects. **Amphotericin B** binds to **ergosterol**, creating pores that disrupt the cell membrane.
**Why the Correct Answer is Right**
**Amphotericin B** forms a complex with **ergosterol**, leading to the formation of transmembrane pores. This pore formation disrupts the **fungal cell membrane**, causing leakage of essential ions and molecules, ultimately leading to cell death. The binding to **ergosterol** is specific to fungal cells, which is why **amphotericin B** has antifungal properties.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not involve **ergosterol**.
**Option B:** Incorrect as it does not describe pore formation.
**Option D:** Incorrect because it is unrelated to **amphotericin B**'s mechanism.
**Clinical Pearl / High-Yield Fact**
Remember, **amphotericin B**'s binding to **ergosterol** is key to its mechanism. This is a high-yield fact for exams, highlighting the drug's specificity to fungal cells.
**Correct Answer:** D. Binding to ergosterol.