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Antarctic freshwater microalga, Chloromonas reticulata, suppresses inflammation and carcinogenesis

Cited 1 time in wos
Cited 2 time in scopus
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Antarctic freshwater microalga, Chloromonas reticulata, suppresses inflammation and carcinogenesis
Other Titles
남극 담수미세조류 Chloromonas reticulata의 염증과 발암의 억제
Suh, Sung-Suk
Hong, Ju Mi
Kim, Eun Jae
Jung, Seung Won
Chae, Hyunsik
Kim, Jung Eun
Kim, Ji Hee
Kim, Il-Chan
Kim, Sanghee
General & Internal Medicine
Inflammation cancer; Chloromonas reticulata; pro-inflammatory cytokines; HCT116
Issue Date
Suh, Sung-Suk, et al. 2019. "Antarctic freshwater microalga, Chloromonas reticulata, suppresses inflammation and carcinogenesis". INTERNATIONAL JOURNAL OF MEDICAL SCIENCES, 16(2): 189-197.
Inflammation triggered by the innate immune system is a strategy to protect organisms from the risk of environmental infection. However, it has recently become clear that inflammation can cause a variety of human diseases, including cancer. In this study, we investigated the effects of an ethanol extract of the Antarctic freshwater microalgae, Chloromonas reticulata (ETCH), on inflammation and carcinogenesis in RAW 264.7 macrophages and HCT116 human colon cancer cells, respectively. ETCH exhibited significant anti-inflammatory activity through the dose-dependent modulation of major inflammatory markers such as COX-2, IL-6, iNOS, TNF-α, and NO production. For example, ETCH reduced LPS-induced upregulation of COX-2, IL-6, iNOS, and TNF- alpha mRNA levels, leading to a significant decrease in the levels of LPS-stimulated NO and IL-6 as well as TNF-alpha products. In contract, ETCH exhibited dose-dependent cytotoxic activity against HCT116 cells, yielding a profound reduction in the proliferation of the cancer cells. Furthermore, ETCH induced G2 phase cell cycle arrest by transcriptionally regulating of genes involved in G2 / M transition including p21 (CDKN1A), cyclin B1 (CCNB1), and CDK1; CDKN1A mRNA levels were upregulated in response to ETCH, whereas CCNB1 and CDK1 were downregulated. This study reports for the first time anti-inflammatory and anti-cancer effects of, C. reticulata and provides new insights into the molecular mechanisms of the linkage between inflammation and cancer.
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