KDR and lung cancer: In vitro, TLR8 agonist stimulation of lung cancer cells resulted in the activation of NF‐κB, increased expression of proinflammatory factors (IL‐6, IL‐8, GM‐CSF, IL‐1α, and IL‐12), and increased expression of antiapoptotic proteins Bcl‐2, VEGFR2, and chemokine receptors [48].