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Bresgen N, Kovacs M, Lahnsteiner A, Felder TK, Rinnerthaler M. The Janus-Faced Role of Lipid Droplets in Aging: Insights from the Cellular Perspective. Biomolecules 2023; 13:912. [PMID: 37371492 DOI: 10.3390/biom13060912] [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: 03/13/2023] [Revised: 05/22/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
It is widely accepted that nine hallmarks-including mitochondrial dysfunction, epigenetic alterations, and loss of proteostasis-exist that describe the cellular aging process. Adding to this, a well-described cell organelle in the metabolic context, namely, lipid droplets, also accumulates with increasing age, which can be regarded as a further aging-associated process. Independently of their essential role as fat stores, lipid droplets are also able to control cell integrity by mitigating lipotoxic and proteotoxic insults. As we will show in this review, numerous longevity interventions (such as mTOR inhibition) also lead to strong accumulation of lipid droplets in Saccharomyces cerevisiae, Caenorhabditis elegans, Drosophila melanogaster, and mammalian cells, just to name a few examples. In mammals, due to the variety of different cell types and tissues, the role of lipid droplets during the aging process is much more complex. Using selected diseases associated with aging, such as Alzheimer's disease, Parkinson's disease, type II diabetes, and cardiovascular disease, we show that lipid droplets are "Janus"-faced. In an early phase of the disease, lipid droplets mitigate the toxicity of lipid peroxidation and protein aggregates, but in a later phase of the disease, a strong accumulation of lipid droplets can cause problems for cells and tissues.
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Affiliation(s)
- Nikolaus Bresgen
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, 5020 Salzburg, Austria
| | - Melanie Kovacs
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, 5020 Salzburg, Austria
| | - Angelika Lahnsteiner
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, 5020 Salzburg, Austria
| | - Thomas Klaus Felder
- Department of Laboratory Medicine, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Mark Rinnerthaler
- Department of Biosciences and Medical Biology, Paris-Lodron University Salzburg, 5020 Salzburg, Austria
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Zhang BT, Xu JY, Wang W, Zeng Y, Jiang J. Obesity and cancer: Mouse models used in studies. Front Oncol 2023; 13:1125178. [PMID: 37007087 PMCID: PMC10061215 DOI: 10.3389/fonc.2023.1125178] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/07/2023] [Indexed: 03/18/2023] Open
Abstract
There is increasing evidence that obesity is associated with the occurrence and development of malignant tumors. When studying the relationship between obesity and malignant tumors, it is very important to choose an appropriate animal model. However, BALB/c nude mice and other animals commonly used to study tumor xenograft (human-derived tumor cell lines) transplantation models are difficult to induce obesity, while C57BL/6 mice and other model animals commonly used for obesity research are not suitable for tumor xenograft transplantation. Therefore, it is difficult to replicate both obesity and malignancy in animal models at the same time. This review summarizes several experimental animal models and protocols that can simultaneously induce obesity and tumor xenografts.
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Affiliation(s)
- Bo-Tao Zhang
- Department of General Surgery (Thyroid Surgery), the Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jia-Ying Xu
- Department of General Surgery (Thyroid Surgery), the Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Wei Wang
- Department of General Surgery (Thyroid Surgery), the Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yang Zeng
- Department of Orthodontic, the Affiliated Stomatological Hospital of Southwest Medical University, Luzhou Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Luzhou, China
- *Correspondence: Jun Jiang, ; Yang Zeng,
| | - Jun Jiang
- Department of General Surgery (Thyroid Surgery), the Affiliated Hospital of Southwest Medical University, Luzhou, China
- *Correspondence: Jun Jiang, ; Yang Zeng,
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Oh MJ, Lee HB, Yoo G, Park M, Lee CH, Choi I, Park HY. Anti-obesity effects of red pepper ( Capsicum annuum L.) leaf extract on 3T3-L1 preadipocytes and high fat diet-fed mice. Food Funct 2023; 14:292-304. [PMID: 36504043 DOI: 10.1039/d2fo03201e] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Patients with obesity mostly have metabolic syndrome and this can lead to multiple health problems. In the present study, we evaluated the anti-obesity effect of water-soluble red pepper (Capsicum annuum L.) leaf extract (PLE) on 3T3-L1 adipocytes and high-fat diet (HFD)-fed mice. The adipocyte lipid content was determined using Oil Red O staining, which revealed that 100 μg mL-1 PLE markedly reduced fat accumulation without affecting the cell viability. PLE exhibited high prebiotic activity scores by modulating probiotic strains, contributing to host health improvement. In vivo investigation in HFD-fed mice revealed that PLE supplementation significantly decreased the HFD-induced increases in the body weight, amount of white adipose tissue, and serum triglyceride, total cholesterol, leptin, and insulin levels. Consistent with its effects on reduced lipid droplet formation in the liver, PLE supplementation suppressed the expression of lipid synthesis-related proteins including SREBP-1, FAS, and PPAR-γ in the liver and increased that of PGC-1α, CPT1, and adiponectin in epididymal WAT. PLE treatment improved intestinal barrier function and inflammation and reduced harmful intestinal enzyme activities in the feces. Collectively, these results indicate that PLE inhibits fat accumulation in HFD-fed mice via the suppression of adipogenesis and lipogenesis, suggesting its potential in preventing obesity.
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Affiliation(s)
- Mi-Jin Oh
- Research Division of Food Functionality, Korea Food Research Institute, Jeollabuk-do 55365, Republic of Korea.
| | - Hye-Bin Lee
- Research Division of Food Functionality, Korea Food Research Institute, Jeollabuk-do 55365, Republic of Korea.
| | - Guijae Yoo
- Research Division of Food Functionality, Korea Food Research Institute, Jeollabuk-do 55365, Republic of Korea.
| | - Miri Park
- Research Division of Food Functionality, Korea Food Research Institute, Jeollabuk-do 55365, Republic of Korea.
| | - Chang-Hyun Lee
- Department of Anatomy, Woosuk University, Jeollabuk-do 55338, Republic of Korea
| | - Inwook Choi
- Research Division of Food Functionality, Korea Food Research Institute, Jeollabuk-do 55365, Republic of Korea.
| | - Ho-Young Park
- Research Division of Food Functionality, Korea Food Research Institute, Jeollabuk-do 55365, Republic of Korea.
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Calderón-Torres CM, Ortiz-Reyes AE, Murguía-Romero M. Oxidative Damage by 3-nitrotyrosine in Young Adults with Obesity: Its Implication in Chronic and Contagious Diseases. Curr Mol Med 2023; 23:358-364. [PMID: 35331110 DOI: 10.2174/1566524022666220324114027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/07/2022] [Accepted: 02/09/2022] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Cellular damage by oxidation occurs in numerous chronic diseases, such as obesity, type II diabetes, cardiovascular disease, nonalcoholic fatty liver, etc. The oxidized compound 3-nitrotyrosine is a marker of oxidative stress and protein oxidation damage. OBJECTIVE The article aims to assess whether 3-nitrotyrosine levels are higher in young people with obesity than in the same population without obesity. METHODS Anthropometry and blood chemistry analyses were performed on 24 young Mexican participants (18-30 years old), categorized into two groups based on their waist circumference: Withobesity (≥ 80 cm women; ≥ 90 cm men) and without-obesity (<80 cm women; <90 cm men). Additionally, 3-nitrotyrosine blood values were quantified by ELISA. RESULTS Except for HDL-cholesterol, the mean values of lipids increased in women and men with obesity (p<0.05), and 3-nitrotyrosine concentration (nM/μg total protein) was higher by 60% in the group with-obesity compared to the group without-obesity, both for women (66.21 ± 23.85 vs. 40.69 ± 16.25, p<0.05) and men (51.72 ± 20.56 vs. 30.52 ± 5.21, p<0.05). CONCLUSION Oxidative damage measured by compound 3-nitrotyrosine was higher in the group with obesity than in the group without obesity, which, if not controlled, could lead to a chronic oxidative condition and thereby to a degree of cellular aging with adverse health effects.
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Affiliation(s)
- Claudia Marissa Calderón-Torres
- Facultad de Estudios Superiores Iztacala, Unidad de Biomedicina, Universidad Nacional Autónoma de México. Ave. de Los Barrios #1, Tlalnepantla, 54090 Estado de México, Mexico
| | - Ana E Ortiz-Reyes
- Facultad de Estudios Superiores Iztacala, Unidad de Biomedicina, Universidad Nacional Autónoma de México. Ave. de Los Barrios #1, Tlalnepantla, 54090 Estado de México, Mexico
| | - Miguel Murguía-Romero
- Instituto de Biología, Universidad Nacional Autónoma de México, Circuito Zona Deportiva s/n, Ciudad Universitaria, Coyoacán, 04510 Ciudad de México, Mexico
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Histological changes induced by Piroxicam on the hepatic and renal tissues of mice with and without administration of Peppermint oil. CURRENT ISSUES IN PHARMACY AND MEDICAL SCIENCES 2022. [DOI: 10.2478/cipms-2022-0033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Abstract
Piroxicam is a popular anti-inflammatory drug that displays palliative and antipyretic activity. Peppermint oil is a common flavoring used in foods and drinks. To investigate the defensive action of Peppermint oil against the hepatic and renal histological damage induced by Piroxicam in mice.
Forty healthy adult Swiss albino mice of both sexes were categorized into 4 groups (10 mice in each group): Control group (I); Treatment group (II) – injected with Piroxicam 0.3 mg/kg/rat/day via intraperitoneal route for 28 days; Treatment group (III) – oral Peppermint oil 0.2 ml/kg/day by oral gavage 24 hours preceding each injection of Piroxicam; Treatment group (IV) oral Peppermint oil alone. Blood samples were withdrawn to estimate the hepatic and renal functions. Immediately after death, specimens of liver and kidney from the four groups were isolated and put in 10% concentration buffered formalin for 24 hours then prepared for light microscopic examination.
There was a highly significant rise in the serum level of hepatic enzymes (alanine aminotransferase, aspartate aminotransferase and alkaline phosphatase and total serum bilirubin) in the group treated with Piroxicam, as compared to the control group. These returned to near normal level in the group treated with Piroxicam and Peppermint oil. Liver samples of the treated mice showed ballooning degeneration of hepatocytes, small apoptotic hepatocytes and inflammatory cellular infiltration, whereas kidney sections revealed cystic dilatation of Bowman’s space, shrinkage of glomerular tuft and apoptosis of epithelial cells lining the tubules. In contrast, the addition of peppermint oil efficiently ameliorated the hepatic and renal tissue changes.
Piroxicam induces hepatorenal toxicity as exhibited by histological, histochemical and biochemical findings. Peppermint oil shows ameliorative properties against the hepatorenal toxic effects induced by Piroxicam.
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Li X, Cui W, Cui Y, Song X, Jia L, Zhang J. Stropharia rugoso-annulata acetylated polysaccharides alleviate NAFLD via Nrf2/JNK1/AMPK signaling pathways. Int J Biol Macromol 2022; 215:560-570. [PMID: 35772637 DOI: 10.1016/j.ijbiomac.2022.06.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/13/2022] [Accepted: 06/23/2022] [Indexed: 12/15/2022]
Abstract
The acetylated Stropharia rugoso-annulata polysaccharides (ASRP) was successfully characterized, and the effects and mechanism on alleviating NAFLD were investigated in HFD-induced mice models. The characterization showed that ASRP was successfully acetylated and rich in galactose. The animal studies demonstrated that ASRP at the dose of 400 mg/kg possessed hepatoprotective effects by potential antioxidation, anti-inflammation and improving hepatocellular histopathology, with the possible mechanisms on regulating the JNK1/AP-1 and activating the Nrf2 signaling pathways. Besides, ASRP could improve the fat metabolism by activating the AMPK/SREBP-1c signaling pathways. The results provided basal theories for the development of ASRP on treating the NAFLD and its complications.
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Affiliation(s)
- Xueping Li
- College of Life Science, Shandong Agricultural University, Taian 271018, PR China
| | - Weijun Cui
- College of Life Science, Shandong Agricultural University, Taian 271018, PR China
| | - Yanfei Cui
- College of Life Science, Shandong Agricultural University, Taian 271018, PR China
| | - Xinling Song
- College of Life Science, Shandong Agricultural University, Taian 271018, PR China
| | - Le Jia
- College of Life Science, Shandong Agricultural University, Taian 271018, PR China.
| | - Jianjun Zhang
- College of Life Science, Shandong Agricultural University, Taian 271018, PR China.
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Soldo AM, Soldo I, Karačić A, Konjevod M, Perkovic MN, Glavan TM, Luksic M, Žarković N, Jaganjac M. Lipid Peroxidation in Obesity: Can Bariatric Surgery Help? Antioxidants (Basel) 2022; 11:antiox11081537. [PMID: 36009256 PMCID: PMC9405425 DOI: 10.3390/antiox11081537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022] Open
Abstract
Obesity and chronic oxidative stress, often being associated with each other in a vicious circle, are important factors of chronic diseases. Although it was usually considered to accompany aging and wealth, global trends show the increase in obesity among children even in Third World countries. Being manifested by an imbalance between energy consumption and food intake, obesity is characterized by an excessive or abnormal fat accumulation, impaired redox homeostasis and metabolic changes often associated with the self-catalyzed lipid peroxidation generating 4-hydroxynonenal, pluripotent bioactive peroxidation product of polyunsaturated fatty acids. Conservative methods targeting obesity produced only modest and transient results in the treatment of morbid obesity. Therefore, in recent years, surgery, primarily bariatric, became an attractive treatment for morbid obesity. Since adipose tissue is well known as a stress organ with pronounced endocrine functions, surgery results in redox balance and metabolic improvement of the entire organism. The source of bioactive lipids and lipid-soluble antioxidants, and the complex pathophysiology of lipid peroxidation should thus be considered from the aspects of personalized and integrative biomedicine to treat obesity in an appropriate way.
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Affiliation(s)
- Ana Maria Soldo
- Department of Gastroenterology, General Hospital “Dr. Ivo Pedisic”, 44000 Sisak, Croatia
| | - Ivo Soldo
- Surgery Clinic, University Hospital Sveti Duh, 10000 Zagreb, Croatia
| | - Andrija Karačić
- Surgery Clinic, University Hospital Sveti Duh, 10000 Zagreb, Croatia
| | - Marcela Konjevod
- Division of Molecular Medicine, Ruder Boskovic Institute, 10000 Zagreb, Croatia
| | | | | | - Martina Luksic
- Department of Endocrinology, Diabetes and Metabolic Diseases, University Hospital Sveti Duh, 10000 Zagreb, Croatia
| | - Neven Žarković
- Division of Molecular Medicine, Ruder Boskovic Institute, 10000 Zagreb, Croatia
- Correspondence: (N.Ž.); (M.J.)
| | - Morana Jaganjac
- Division of Molecular Medicine, Ruder Boskovic Institute, 10000 Zagreb, Croatia
- Correspondence: (N.Ž.); (M.J.)
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Comparison of Five Oxidative Stress Biomarkers in Vegans and Omnivores from Germany and Finland. Nutrients 2022; 14:nu14142918. [PMID: 35889875 PMCID: PMC9323774 DOI: 10.3390/nu14142918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 07/13/2022] [Accepted: 07/13/2022] [Indexed: 02/01/2023] Open
Abstract
When the amount of reactive oxygen species produced by human metabolism cannot be balanced by antioxidants, this phenomenon is commonly referred to as oxidative stress. It is hypothesised that diets with high amounts of plant food products may have a beneficial impact on oxidative stress status. However, few studies have examined whether a vegan diet is associated with lower oxidative stress compared to an omnivorous diet. The present cross-sectional study aimed to compare the levels of five oxidative stress biomarkers in vegans and omnivores. Data of 36 vegans and 36 omnivores from Germany and of 21 vegans and 18 omnivores from Finland were analysed. HPLC coupled with mass spectrometry or fluorescence detection and ELISA methods were used to measure the oxidative stress biomarkers malondialdehyde (MDA), protein carbonyls and 3-nitrotyrosine in plasma and 8-hydroxy-2'-deoxyguanosine (8-OHdG) and 8-iso-prostaglandin F2α (8-iso-PGF2α) in 24 h urine. Analyses of variance and covariance, considering potential confounders, were used. Vegans and omnivores showed no differences in MDA and protein carbonyl concentrations. In Finnish but not in German vegans, the concentrations of 3-nitrotyrosine were lower compared to those in omnivores (p = 0.047). In Germany, vegans showed lower excretion levels of 8-iso-PGF2α than omnivores (p = 0.002) and with a trend also of 8-OHdG (p = 0.05). The sensitivity analysis suggests lower 8-iso-PGF2α excretion levels in women compared to men, independently of the dietary group. The present study contributes to expanding our knowledge of the relationship between diet and oxidative stress and showed that 3-nitrotyrosine, 8-OHdG and 8-iso-PGF2α tended to be lower in vegans. Furthermore, studies are recommended to validate the present findings.
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Peter Eckl: Research on the Pro-/Antioxidant Balance. Antioxidants (Basel) 2022; 11:antiox11061079. [PMID: 35739976 PMCID: PMC9219729 DOI: 10.3390/antiox11061079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 11/16/2022] Open
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HtrA2/Omi mitigates NAFLD in high-fat-fed mice by ameliorating mitochondrial dysfunction and restoring autophagic flux. Cell Death Dis 2022; 8:218. [PMID: 35449197 PMCID: PMC9023526 DOI: 10.1038/s41420-022-01022-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 11/08/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver metabolic syndrome which affects millions of people worldwide. Recently, improving mitochondrial function and autophagic ability have been proposed as a means to prevent NAFLD. It has been previously described that high-temperature requirement protein A2 (HtrA2/Omi) favors mitochondrial homeostasis and autophagy in hepatocytes. Thus, we explored the effects of HtrA2/Omi on regulating mitochondrial function and autophagy during NAFLD development. High-fat diet (HFD)-induced NAFLD in mice and free fatty acids (FFAs)-induced hepatocytes steatosis in vitro were established. Adeno-associated viruses (AAV) in vivo and plasmid in vitro were used to restore HtrA2/Omi expression. In this study, we reported that HtrA2/Omi expression considerably decreased in liver tissues from the HFD-induced NAFLD model and in L02 cells with FFA-treated. However, restoring HtrA2/Omi ameliorated hepatic steatosis, confirming by improved serum lipid profiles, glucose homeostasis, insulin resistance, histopathological lipid accumulation, and the gene expression related to lipid metabolism. Moreover, HtrA2/Omi also attenuated HFD-mediated mitochondrial dysfunction and autophagic blockage. TEM analysis revealed that liver mitochondrial structure and autophagosome formation were improved in hepatic HtrA2/Omi administration mice compared to HFD mice. And hepatic HtrA2/Omi overexpression enhanced mitochondrial fatty acid β-oxidation gene expression, elevated LC3II protein levels, induced LC3 puncta, and decreased SQSTM1/p62 protein levels. Furthermore, hepatic HtrA2/Omi increased respiratory exchange ratio and heat production in mice. Finally, HtrA2/Omi overexpression by plasmid significantly diminished lipid accumulation, mitochondrial dysfunction, and autophagic inhibition in FFA-treated L02 hepatocytes. Taken together, we demonstrated that HtrA2/Omi was a potential candidate for the treatment of NAFLD via improving mitochondrial functions, as well as restoring autophagic flux.
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2-Amino-3-Methylimidazo[4,5-f]quinoline Triggering Liver Damage by Inhibiting Autophagy and Inducing Endoplasmic Reticulum Stress in Zebrafish ( Danio rerio). Toxins (Basel) 2021; 13:toxins13110826. [PMID: 34822609 PMCID: PMC8620671 DOI: 10.3390/toxins13110826] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 12/16/2022] Open
Abstract
It is important to note that 2-Amino-3-methylimidazole[4,5-f]quinoline (IQ) is one of the most common heterocyclic amines (HCAs), which is a class of mutagenic/carcinogenic harmful compounds mainly found in high-protein thermal processed foods and contaminated environments. However, the pre-carcinogenic toxicity of IQ to the liver and its mechanism are poorly understood, further research is needed. In light of this, we exposed zebrafish to IQ (0, 8, 80, and 800 ng/mL) for 35 days, followed by comprehensive experimental studies. Histopathological and ultrastructural analysis showed that hepatocytes were damaged. TUNEL results showed that IQ induced apoptosis of liver cells, the expression of apoptosis factor gene was significantly increased, and the expression of Bcl-2 protein was significantly decreased. In addition, upregulated expression of the 78-kDa glucose-regulated protein (GRP78) and C/EBP homologous protein (CHOP) and endoplasmic reticulum stress (ERS)-related factors transcription levels were elevated obviously, suggesting that IQ induced ERS. Decreased protein expression of autophagy-related 5 (Atg5)-Atg12, Beclin1, and LC3-II, increased protein expression of p62, and autophagy-related factors transcription levels were significantly decreased, suggesting that IQ inhibited autophagy. Overall, our research showed that the potential harm of IQ to the liver before the occurrence of liver cancer was related to ERS and its mediated autophagy and apoptosis pathways.
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