MMP9 and influenza: Jin Yaqing et al. [21], in their study on the mechanism of Elsholtzia splendens in treating influenza, utilized databases such as TCMSP, GeneCards, OMIM, DAVID, and STRING to identify nine core proteins including Akt serine/threonine kinase 1 (Akt1), non-receptor tyrosine kinase (SRC), heat shock protein (HSP) 90AA1, epidermal growth factor receptor (EGFR), matrix metalloproteinase 9 (MMP9), prostaglandin–endoperoxide synthase 2 (PTGS2), and mechanistic target of rapamycin (mTOR).