Abstract
Catecholamines, which are involved in response to physical or emotional stress, have emerged as one of the main mediators of the relationship between chronic stress and cancer progression. The study in this issue of Cancer Research by Liu and colleagues reveals a new mechanism by which psychologic stress stimulates cancer progression through the D2 dopamine receptor and activation of the oxygen-independent HIF1α pathway. Although most investigations so far have focused on the action of the stress-related catecholamines norepinephrine and epinephrine on tumor cells, this study shows that dopamine and its receptor can be a potential therapeutic target. The findings broaden the understanding of the interaction of catecholamines with the tumor microenvironment and reinforces the need to look at psychologic stress as a modulator of cancer progression.See related article by Liu et al., p. 5353.
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