Therapeutic properties of green tea against environmental insults

Lixia Chen, Huanbiao Mo, Ling Zhao, Weimin Gao, Shu Wang, Meghan M. Cromie, Chuanwen Lu, Jia Sheng Wang, Chwan Li Shen

Research output: Contribution to journalReview article

23 Scopus citations

Abstract

Pesticides, smoke, mycotoxins, polychlorinated biphenyls (PCBs), and arsenic are the most common environmental toxins and toxicants to humans. These toxins and toxicants may impact on human health at the molecular (DNA, RNA, or protein), organelle (mitochondria, lysosome, or membranes), cellular (growth inhibition or cell death), tissue, organ, and systemic levels. Formation of reactive radicals, lipid peroxidation, inflammation, genotoxicity, hepatotoxicity, embryotoxicity, neurological alterations, apoptosis, and carcinogenic events are some of the mechanisms mediating the toxic effects of the environmental toxins and toxicants. Green tea, the nonoxidized and nonfermented form of tea that contains several polyphenols, including green tea catechins, exhibits protective effects against these environmental toxins and toxicants in preclinical studies and to a much-limited extent, in clinical trials. The protective effects are collectively mediated by antioxidant, antiinflammatory, antimutagenic, hepatoprotective and neuroprotective, and anticarcinogenic activities. In addition, green tea modulates signaling pathway including NF-κB and ERK pathways, preserves mitochondrial membrane potential, inhibits caspase-3 activity, down-regulates proapoptotic proteins, and induces the phase II detoxifying pathway. The bioavailability and metabolism of green tea and its protective effects against environmental insults induced by pesticides, smoke, mycotoxins, PCBs, and arsenic are reviewed in this paper. Future studies with emphasis on clinical trials should identify biomarkers of green tea intake, examine the mechanisms of action of green tea polyphenols, and investigate potential interactions of green tea with other toxicant-modulating dietary factors.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalJournal of Nutritional Biochemistry
Volume40
DOIs
StatePublished - Feb 1 2017

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Keywords

  • Cigarette smoke
  • Green tea
  • Heavy metal
  • Mycotoxin
  • PCB
  • Pesticides

Cite this

Chen, L., Mo, H., Zhao, L., Gao, W., Wang, S., Cromie, M. M., Lu, C., Wang, J. S., & Shen, C. L. (2017). Therapeutic properties of green tea against environmental insults. Journal of Nutritional Biochemistry, 40, 1-13. https://doi.org/10.1016/j.jnutbio.2016.05.005