The expression of β-adrenergic receptors has been correlated with the over-expression of the arachidonic acid-metabolizing enzymes cyclooxygenase-2 (COX-2) and lipoxygenases (LOX) in adenocarcinomas of lungs [17], colon [18], prostate [19], and pancreas [15]. This evidence concerns the gene PTGS2 and lung adenocarcinoma.