Which biomarker is commonly used to monitor disease activity in sarcoidosis?

Which biomarker is commonly used to monitor disease activity in sarcoidosis?

• A. ACE level
• B. CRP
• C. ESR
• D. Troponin

Answer: (A)

In sarcoidosis, active disease tends to correlate with the amount of granulomatous inflammation. Serum ACE level rises as granulomas form and expand because the epithelioid cells within these granulomas produce ACE. Because of this link to granuloma burden, ACE levels are commonly used to gauge disease activity over time and to monitor response to therapy, though they’re not perfect and can be normal in active disease or elevated for other reasons. Inflammatory markers like CRP and ESR are nonspecific; they rise with many infections and inflammatory conditions and don’t specifically track sarcoid activity. Troponin indicates cardiac injury, not overall sarcoidosis activity, and is used when there’s concern for cardiac involvement rather than as a general activity marker. So the biomarker most commonly used to monitor disease activity in sarcoidosis is ACE level.

In sarcoidosis, active disease tends to correlate with the amount of granulomatous inflammation. Serum ACE level rises as granulomas form and expand because the epithelioid cells within these granulomas produce ACE. Because of this link to granuloma burden, ACE levels are commonly used to gauge disease activity over time and to monitor response to therapy, though they’re not perfect and can be normal in active disease or elevated for other reasons.

Inflammatory markers like CRP and ESR are nonspecific; they rise with many infections and inflammatory conditions and don’t specifically track sarcoid activity. Troponin indicates cardiac injury, not overall sarcoidosis activity, and is used when there’s concern for cardiac involvement rather than as a general activity marker.

So the biomarker most commonly used to monitor disease activity in sarcoidosis is ACE level.