CXCL8 and periodontal disorder: Along with OSCC patients, higher values of pro-inflammatory cytokines (IL-1, IL-6, IL-8, TNF-α) have been discovered in saliva samples from patients with premalignant lesions (with moderate or severe epithelial dysplasia) (27), and cytokine IL-8 in patients with periodontal disease and autoimmune diseases (6).