Long acting corticosteroid is –
**Core Concept**
Long-acting corticosteroids are a class of medications that belong to the glucocorticoid family. They are used to treat various inflammatory and autoimmune conditions by mimicking the effects of cortisol, a naturally occurring steroid hormone produced by the adrenal gland.
**Why the Correct Answer is Right**
Long-acting corticosteroids exert their effects by binding to glucocorticoid receptors in the cytoplasm of cells, which then translocate to the nucleus and alter gene expression. This leads to the suppression of inflammatory responses, including the inhibition of phospholipase A2, lipoxygenase, and cyclooxygenase enzymes, which are involved in the production of pro-inflammatory mediators. Examples of long-acting corticosteroids include dexamethasone, betamethasone, and triamcinolone.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because short-acting corticosteroids, such as prednisolone, have a shorter duration of action and are metabolized more quickly than long-acting corticosteroids.
**Option B:** Incorrect because anabolic steroids, such as oxandrolone, have a different mechanism of action and are not classified as corticosteroids.
**Option C:** Incorrect because antisteroids, such as mifepristone, are actually used to block the effects of corticosteroids, rather than mimicking them.
**Clinical Pearl / High-Yield Fact**
When selecting a corticosteroid, it's essential to consider the duration of action, potency, and potential side effects to ensure optimal treatment outcomes.
**Correct Answer:** D. Triamcinolone