Cyclosporine uses are all except –
**Core Concept**
Cyclosporine is a calcineurin inhibitor that suppresses the immune system by inhibiting T-cell activation. It is used to prevent organ rejection in transplant patients and to treat autoimmune diseases such as psoriasis and rheumatoid arthritis.
**Why the Correct Answer is Right**
Cyclosporine works by binding to cyclophilin, which then inhibits the phosphatase activity of calcineurin. This inhibition prevents the dephosphorylation and subsequent activation of nuclear factor of activated T-cells (NFAT), a critical transcription factor involved in T-cell activation. The suppression of T-cell activation leads to a reduction in the immune response and prevents organ rejection.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because cyclosporine is not used to treat hypertension. While cyclosporine can cause hypertension as a side effect, it is not used to treat it.
**Option B:** This option is incorrect because cyclosporine is not used to treat bacterial infections. Cyclosporine is an immunosuppressant and is used to treat conditions caused by an overactive immune response, not bacterial infections.
**Option C:** This option is incorrect because cyclosporine is not used to treat cancer. While cyclosporine has been used to treat certain types of cancer, it is not a primary treatment for cancer and is not used to treat all types of cancer.
**Clinical Pearl / High-Yield Fact**
It is essential to monitor cyclosporine levels and renal function in patients taking this medication, as high levels can cause nephrotoxicity and kidney damage.
**Correct Answer: A. Cyclosporine is not used to treat hypertension.**