The influence of bio-behavioural factors on tumour biology: pathways and mechanisms

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Abstract
Stress does not cause cancer per se, but depression and a lack of social support might influence cancer progression and clinical outcome. Can identification of the molecular and biological mechanisms involved be used to improve patient treatment? Epidemiological studies indicate that stress, chronic depression and lack of social support might serve as risk factors for cancer development and progression. Recent cellular and molecular studies have identified biological processes that could potentially mediate such effects. This review integrates clinical, cellular and molecular studies to provide a mechanistic understanding of the interface between biological and behavioural influences in cancer, and identifies novel behavioural or pharmacological interventions that might help improve cancer outcomes.