More Evidence Stress and Cancer are Linkedhttp://articles.mercola.com/sites/articles/archive/2006/11/25/more-evidence-stress-and-are-cancer-linked.aspxNorepinephrine, a hormone produced during periods of stress, may increase the growth rate of cancer. The norepinephrine can stimulate tumor cells to produce two compounds (matrix metalloproteinases called MMP-2 and MMP-9) that break down the tissue aroundenCommunityServer 2008.5 SP1 (Build: 31106.3070)