Effects of Trans, Trans-2,4-decadienal on the Ions Currents of Cardiomyocytes: Possible Mechanisms of Arrhythmogenesis Induced by Cooking-oil Fumes

• Published in: Scientific reports Vol. 10; no. 1; p. 5771
• Main Authors: Jhuo, Shih-Jie, Liu, I-Hsin, Tsai, Wei-Chung, Lee, Kun-Tai, Wu, Bin-Nan, Lai, Wen-Ter
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01-04-2020; Nature Publishing Group
• Subjects: 631/443/592/75/29; 631/57/2270/1140; 82/80; 9/74; Air Pollutants - adverse effects; Air pollution; Air Pollution, Indoor - adverse effects; Aldehydes - adverse effects; Animals; Arrhythmias, Cardiac - etiology; Arrhythmias, Cardiac - metabolism; Calcium channels (voltage-gated); Calcium Channels, L-Type - metabolism; Cardiomyocytes; Cell Line; Cell Survival - drug effects; Cooking; Fumes; Heart; Humanities and Social Sciences; Humans; Ion currents; Ion Transport - drug effects; Linoleic acid; multidisciplinary; Myocytes, Cardiac - drug effects; Myocytes, Cardiac - metabolism; Oils & fats; Oils - adverse effects; Peroxidation; Pollutants; Potassium channels (voltage-gated); Rats; Science; Science (multidisciplinary); Shab Potassium Channels - metabolism
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-020-62733-1

Household air pollution has adverse effects on cardiovascular health. One of the major sources of household air pollutants is the combustion of cooking oils during cooking. Trans, trans-2,4-decadienal (tt-DDE) is a type of dienaldehyde that is present in a wide range of food and food products. It is a byproduct of the peroxidation of linoleic acid following the heating of oil during cooking. The mechanisms of the associations between household air pollution and cardiac arrhythmias are currently unclear. The purpose of this study was to determine effects of tt-DDE on the ion currents in H9c2 cells. The I
K
and I
Ca,L
in H9c2 cells treated with and without tt-DDE were measured using the whole-cell patch clamp method. Expressions of Kv2.1 and Cav1.2 in H9c2 cells treated with and without tt-DDE were measured by western blot analysis. After the H9c2 cells had been exposed to tt-DDE, the I
K
and I
Ca,L
were significantly decreased. The expression of Kv2.1, unlike that of Cav1.2, was also significantly decreased in these cells. These changes in I
K
and I
Ca,L
that were induced by tt-DDE may help to explain the association between cardiac arrhythmogenesis and cooking-oil fumes.