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Immunomodulation and Anticancer Immunity: Reviewing the Potential of Probiotics and Their Delivery with Macromolecular Carriers.

Probiotics colonize in the gastrointestinal tract and regulate the homeostasis in healthy human hosts. These protect the host against putrefactive organisms and secrete soluble factors exhibiting important transductive roles. However, constitutive processes in human host are deregulated following dysbiosis caused during prolonged exposure to cytotoxic agents and pollutants. Apart from restoring the homeostasis, probiotic administration has shown to minimize carcinogenesis and post-surgery complications in cancer patients. Moreover, ability of microbial cells to colonize at tumor foci can be harnessed to deliver genes, therapeutic proteins and antibodies in a selective manner. In this review, we have discussed immunomodulatory roles of probiotics in context to cancer prevention. The article further proposes the use of dietary interventions for boosting anticancer immunity and as an alternative to detrimental chemotherapeutic agents. After summarizing clinical evidences on probiotic efficacy, formulation approaches have been described for effective delivery of the microorganisms. The literature shows that polysaccharide matrices can be employed to achieve the survivability of probiotics. Formulation approaches have been reviewed together with the risks associated with the migration of live microorganisms to systemic circulation and their ability of transmitting antibiotic resistance factors into human pathogens.