1
|
Tian Y, Wang H, Han S, Fu Y, Lu F, Wang W, Li X, Ma S, Feng P, Shi Z, Chen H, Hou H. Liver toxicity in rats after subchronic exposure to HTP aerosol and cigarette smoke. Toxicol Res (Camb) 2024; 13:tfae002. [PMID: 38250585 PMCID: PMC10796213 DOI: 10.1093/toxres/tfae002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Revised: 12/13/2023] [Accepted: 01/03/2023] [Indexed: 01/23/2024] Open
Abstract
Background Heated tobacco product (HTP) considered to be a novel tobacco product which was reported safer than traditional cigarettes evidenced by lower potential harmful components released. Liver is an important detoxification organ of the body, the chemical components in aerosols are metabolized in the liver after absorbed, so it is necessary to explore the effect of HTP on the liver. Materials and Methods The potential effect of HTP and cigarette smoke (CS) on SD rats was explored according to OECD 413 subchronic inhalation. The rats were randomly divided into Sham (air), different dosage of HTP groups (HTP_10, 23 and 50 μg nicotine/L aerosol) and Cig_23 (23 μg nicotine/L aerosol) group. After exposure, the clinical pathology, inflammation and oxidative stress were measured. Results The clinical pathology results showed that both HTP_50 and Cig_23 led to abnormality of ALT for male rats. CS and HTP exposure reduced the expression of IL-1β, IL-6 and TNF-α and mitochondrial medicated oxidative stress. In addition, the ATP production was reduced in Cig_23 group. Although inflammation and oxidative stress were displayed, no apoptosis were observed by TUNEL assay and these existed obvious pathological changes only in HTP_50 group, while in CS group with equivalent nicotine, hepatocytes swelling were observed in liver. Conclusion CS exposure induced liver damage through mitochondrial mediated oxidative stress and inflammation, which was also observed in high concentration of HTP exposure group. For the same equivalent nicotine, HTP may show lower toxic effect on liver than CS.
Collapse
Affiliation(s)
- Yushan Tian
- Beijing Life Science Academy, Yingcai South 1st Street, Beijing 102209, China
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Hongjuan Wang
- Beijing Life Science Academy, Yingcai South 1st Street, Beijing 102209, China
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Shulei Han
- Beijing Life Science Academy, Yingcai South 1st Street, Beijing 102209, China
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Yaning Fu
- Beijing Life Science Academy, Yingcai South 1st Street, Beijing 102209, China
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Fengjun Lu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Wenming Wang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Xianmei Li
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Shuhao Ma
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Pengxia Feng
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Zhihao Shi
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Huan Chen
- Beijing Life Science Academy, Yingcai South 1st Street, Beijing 102209, China
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| | - Hongwei Hou
- Beijing Life Science Academy, Yingcai South 1st Street, Beijing 102209, China
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- Key Laboratory of Tobacco Biological Effects, Zhengzhou 450001, China
| |
Collapse
|
2
|
Gholami S, Mokhtari B, Badalzadeh R. Alpha-lipoic acid potentiates the anti-arrhythmic effects of ischemic postconditioning in the setting of cardiac ischemia/reperfusion injury in diabetic rats. J Diabetes Metab Disord 2022; 21:707-716. [PMID: 35673476 DOI: 10.1007/s40200-022-01034-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/15/2022] [Indexed: 01/13/2023]
Abstract
Background Prevention of lethal ventricular arrhythmias induced by myocardial ischemia/reperfusion (I/R) in diabetic patients is the major goal of cardioprotective strategies. Here, we aimed to examine the anti-arrhythmic effect of ischemic postconditioning (IPostC) and alpha-lipoic acid (ALA) in myocardial I/R injury of type-II diabetic rats, focusing on the involvement of connexin-43 and nitric oxide (NO) in this context. Methods Diabetes (duration of 12 weeks) was induced by high-fat diet and low dose of streptozotocin in thirty male Wistar rats (12 weeks old, 200-250 g). After mounting the hearts on the Langendorff apparatus, I/R was induced by the ligation of left anterior descending coronary artery for 35 min, and reperfusion for 60 min. ALA (100 mg/kg/day) was administered orally in diabetic rats for five weeks before I/R. IPostC was applied immediately at early reperfusion. The arrhythmias were evaluated according to the Lambeth convention. Connexin-43 expression and NO levels were assessed by western blotting and Griess calorimetric method, respectively. Results IPostC could not significantly decrease the number, duration, and incidence of premature ventricular contraction, ventricular tachycardia, and ventricular fibrillation, also the severity of arrhythmias in diabetic hearts. However, IPostC in combination with ALA-preconditioning significantly decreased the above mentioned parameters compared with untreated or monotherapies-received diabetic rats (P < 0.05 to P < 0.001). Furthermore, this combination therapy significantly increased connexin-43 expression and NO levels, compared with untreated diabetic rats (P < 0.01). Conclusion Preconditioning with ALA restored anti-arrhythmic effect of IPostC in diabetic hearts. Increased connexin-43 expression and NO levels may be the key players in this cardioprotection.
Collapse
Affiliation(s)
- Sanaz Gholami
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Behnaz Mokhtari
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran.,Department of Physiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Reza Badalzadeh
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran.,Department of Physiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran.,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| |
Collapse
|