Following a pulmonary infection, why does alveolar inflammation resolve, rather than progressing into chronic fibrosis?

💡 Explanation

Resolution of inflammation involves a shift from pro-inflammatory prostaglandins and leukotrienes to specialized pro-resolving mediators (SPMs) like lipoxins and resolvins. These SPMs actively promote immune cell apoptosis and efferocytosis. Therefore, lipoxin and resolvin signaling drives resolution, rather than unchecked fibrosis stimulated by factors like TGF-beta.

• A patient reports chronic pain despite taking NSAIDs. Which mechanism explains why the pain persists when nociceptor sensitization has already lowered the activation threshold?
• Why does enteric nervous system dysfunction often disrupt small intestine nutrient absorption following bariatric surgery?
• Why does a Vitamin D deficiency increase fracture risk during falls?
• In erythrocytes, what causes hemolytic anemia when a G6PD deficiency exists during a malarial infection treated with primaquine?
• If a 60-year-old individual experiences increased difficulty reading small print despite using reading glasses, which mechanism explains this phenomenon in terms of lens curvature?
• Why does steatorrhea (excess fat in feces) occur in individuals with cystic fibrosis, despite normal dietary fat intake?