Journal
CELLULAR AND MOLECULAR LIFE SCIENCES
Volume 74, Issue 15, Pages 2761-2771Publisher
SPRINGER BASEL AG
DOI: 10.1007/s00018-017-2496-y
Keywords
Acidosis; Tumor microenvironment; Dormancy
Categories
Funding
- Istituto Toscano Tumori, Ente Cassa di Risparmio di Firenze
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Although surgical excision, chemo-, and radiotherapy are clearly advanced, tumors may relapse due to cells of the so-called minimal residual disease. Indeed, small clusters of tumor cells persist in host tissues after treatment of the primary tumor elaborating strategies to survive and escape from immunological attacks before their relapse: this variable period of remission is known as cancer dormancy. Therefore, it is crucial to understand and consider the major concepts addressing dormancy, to identify new targets and disclose potential clinical strategies. Here, we have particularly focused the relationships between tumor microenvironment and cancer dormancy, looking at a re-appreciated aspect of this compartment that is the low extracellular pH. Accumulating evidences indicate that acidity of tumor microenvironment is associated with a poor prognosis of tumor-bearing patients, stimulates a chemo-and radio-therapy resistant phenotype, and suppresses the tumoricidal activity of cytotoxic lymphocytes and natural killer cells, and all these aspects are useful for dormancy. Therefore, this review discusses the possibility that acidity of tumor microenvironment may provide a new, not previously suggested, adequate milieu for dormancy of tumor cells.
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