CAMP and oral cavity squamous cell carcinoma: Cathelicidin LL-37 shows multidirectional tissue-specific actions: increased expression of the cathelicidin antimicrobial peptide (CAMP) gene and its secretion are associated with the progression of lung epithelial adenocarcinoma (A549), breast cancer (MCF-7, MDA-MB-435s, MDA-MB-231), and pancreas, colon, hepatoma, and oral squamous cell carcinoma cells [18,19,20,21,22,23].