A researcher investigates osteoarthritis progression by analyzing synovial fluid samples. If IL-1β cytokine levels are chronically elevated, which effect dominates cartilage degradation?

💡 Explanation

Elevated IL-1β promotes cartilage degradation because it upregulates matrix metalloproteinase (MMP) expression. MMPs degrade collagen and proteoglycans, which are essential components of cartilage; therefore, increased MMP expression accelerates breakdown, rather than chondrocyte matrix synthesis, inhibitor activity, or collagen production.

• A patient with chronic dehydration and gout develops kidney stones. Which mechanism explains why uric acid precipitation leads to calcium oxalate stones rather than isolated uric acid stones?
• If a patient's heart rate increases significantly due to exercise, what compensatory mechanism helps maintain stable blood pressure despite the increase in cardiac output?
• Which adaptation occurs when bone growth obstructs ossicles-oval window interface?
• If a patient with chronic kidney disease experiences increased calcium oxalate supersaturation despite increased fluid intake, which mechanism best explains why crystallization continues?
• Why does anaphylactic shock rapidly decrease blood pressure during a severe allergic reaction to peanuts?
• What happens to immune system function when regulatory T cells fail in the thymus during negative selection?