PMID- 31438528 OWN - NLM STAT- MEDLINE DCOM- 20200305 LR - 20240109 IS - 1660-3397 (Electronic) IS - 1660-3397 (Linking) VI - 17 IP - 9 DP - 2019 Aug 21 TI - Indole-4-carboxaldehyde Isolated from Seaweed, Sargassum thunbergii, Attenuates Methylglyoxal-Induced Hepatic Inflammation. LID - 10.3390/md17090486 [doi] LID - 486 AB - Glucose degradation is aberrantly increased in hyperglycemia, which causes various harmful effects on the liver. Glyoxalase-1 (Glo-1) is a ubiquitous cellular enzyme that participates in the detoxification of methylglyoxal (MGO), a cytotoxic byproduct of glycolysis that induces protein modification (advanced glycation end-products, AGEs) and inflammation. Here, we investigated the anti-inflammatory effect of indole-4-carboxaldehyde (ST-I4C), which was isolated from the edible seaweed Sargassum thunbergii, on MGO-induced inflammation in HepG2 cells, a human hepatocyte cell line. ST-I4C attenuated the MGO-induced expression of inflammatory-related genes, such as tumor necrosis factor (TNF)-alpha and IFN-gamma by activating nuclear factor-kappa B (NF-kappaB) without toxicity in HepG2 cells. In addition, ST-I4C reduced the MGO-induced AGE formation and the expression of the receptor for AGE (RAGE). Interestingly, both the mRNA and protein expression levels of Glo-1 increased following ST-I4C treatment, and the decrease in Glo-1 mRNA expression caused by MGO exposure was rescued by ST-I4C pretreatment. These results suggest that ST-I4C shows anti-inflammatory activity against MGO-induced inflammation in human hepatocytes by preventing an increase in the pro-inflammatory gene expression and AGE formation. Therefore, it represents a potential therapeutic agent for the prevention of hepatic steatosis. FAU - Cha, Seon-Heui AU - Cha SH AUID- ORCID: 0000-0002-5004-3223 AD - Department of Marine Biomedical Sciences, Hanseo University, Chungcheongnam-do 31962, Korea. FAU - Hwang, Yongha AU - Hwang Y AD - Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21999, Korea. AD - College of Pharmacy, Gachon University, Incheon 21999, Korea. FAU - Heo, Soo-Jin AU - Heo SJ AD - Jeju International Marine Science Center for Research & Education, Korea Institute of Ocean Science & Technology (KIOST), Jeju 63349, Korea. FAU - Jun, Hee-Sook AU - Jun HS AUID- ORCID: 0000-0002-1166-4932 AD - Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21999, Korea. hsjun@gachon.ac.kr. AD - College of Pharmacy, Gachon University, Incheon 21999, Korea. hsjun@gachon.ac.kr. AD - Gachon Medical and Convergence Institute, Gachon Gil Medical Center, Incheon 21999, Korea. hsjun@gachon.ac.kr. LA - eng GR - HI14C1135/Ministry of Health and Welfare of Korea/ PT - Journal Article DEP - 20190821 PL - Switzerland TA - Mar Drugs JT - Marine drugs JID - 101213729 RN - 0 (AGER protein, human) RN - 0 (Anti-Inflammatory Agents) RN - 0 (Glycation End Products, Advanced) RN - 0 (Indoles) RN - 0 (NF-kappa B) RN - 0 (Receptor for Advanced Glycation End Products) RN - 722KLD7415 (Pyruvaldehyde) RN - EC 4.4.1.5 (GLO1 protein, human) RN - EC 4.4.1.5 (Lactoylglutathione Lyase) SB - IM MH - Anti-Inflammatory Agents/isolation & purification/*pharmacology/therapeutic use MH - Drug Evaluation, Preclinical MH - Glycation End Products, Advanced/metabolism MH - Glycolysis/drug effects MH - Hep G2 Cells MH - Humans MH - Indoles/isolation & purification/*pharmacology/therapeutic use MH - Lactoylglutathione Lyase/antagonists & inhibitors/metabolism MH - NF-kappa B/metabolism MH - Non-alcoholic Fatty Liver Disease/chemically induced/*prevention & control MH - Pyruvaldehyde/*toxicity MH - Receptor for Advanced Glycation End Products/metabolism MH - Sargassum/*chemistry MH - Seaweed/chemistry MH - Signal Transduction/drug effects PMC - PMC6780312 OTO - NOTNLM OT - AGEs OT - Sargassum thunbergii OT - hepatic steatosis OT - metabolic disease OT - seaweed COIS- The authors declare that there are no conflicts of interest. EDAT- 2019/08/24 06:00 MHDA- 2020/03/07 06:00 PMCR- 2019/09/01 CRDT- 2019/08/24 06:00 PHST- 2019/06/05 00:00 [received] PHST- 2019/07/19 00:00 [revised] PHST- 2019/08/16 00:00 [accepted] PHST- 2019/08/24 06:00 [entrez] PHST- 2019/08/24 06:00 [pubmed] PHST- 2020/03/07 06:00 [medline] PHST- 2019/09/01 00:00 [pmc-release] AID - md17090486 [pii] AID - marinedrugs-17-00486 [pii] AID - 10.3390/md17090486 [doi] PST - epublish SO - Mar Drugs. 2019 Aug 21;17(9):486. doi: 10.3390/md17090486.