Zinc in innate and adaptive tumor immunity

• Published in: Journal of translational medicine Vol. 8; no. 1; p. 118
• Main Authors: John, Erica, Laskow, Thomas C, Buchser, William J, Pitt, Bruce R, Basse, Per H, Butterfield, Lisa H, Kalinski, Pawel, Lotze, Michael T
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 18.11.2010; BioMed Central; BMC
• Subjects: Adaptive Immunity - immunology; Apoptosis; Cancer; Cancer cells; Health aspects; Humans; Immunity, Innate - immunology; Natural immunity; Neoplasms - immunology; Physiological aspects; Proteins; Review; Signal Transduction; Zinc; Zinc - deficiency; Zinc - immunology; Zinc - metabolism; Zinc in the body; United States
• ISSN: 1479-5876; 1479-5876
• DOI: 10.1186/1479-5876-8-118

Zinc is important. It is the second most abundant trace metal with 2-4 grams in humans. It is an essential trace element, critical for cell growth, development and differentiation, DNA synthesis, RNA transcription, cell division, and cell activation. Zinc deficiency has adverse consequences during embryogenesis and early childhood development, particularly on immune functioning. It is essential in members of all enzyme classes, including over 300 signaling molecules and transcription factors. Free zinc in immune and tumor cells is regulated by 14 distinct zinc importers (ZIP) and transporters (ZNT1-8). Zinc depletion induces cell death via apoptosis (or necrosis if apoptotic pathways are blocked) while sufficient zinc levels allows maintenance of autophagy. Cancer cells have upregulated zinc importers, and frequently increased zinc levels, which allow them to survive. Based on this novel synthesis, approaches which locally regulate zinc levels to promote survival of immune cells and/or induce tumor apoptosis are in order.