• Filter By:
• Specialty
• Source
• Condition
• Cancer
• Infectious Disease
• Drug
• Training
• Management
• Procedure
• Therapy
• Vaccine
• Nutrition
• Country

STAT3 signaling promotes cardiac injury by upregulating NCOA4-mediated ferritinophagy and ferroptosis in high-fat-diet fed mice
In this study, we found that oleic acid/palmitic acid (OA/PA) increased the level of ferroptotic events including iron and ROS accumulation, upregulation of PTGS2 mRNA and protein levels, reduced SOD and GSH levels, and significant mitochondrial damage in H9C2 cells, which could be reversed by the ferroptosis inhibitor ferrostatin-1 (Fer-1). Intriguingly, we found that the autophagy inhibitor 3-methyladenine mitigated OA/PA-induced ferritin downregulation, iron overload and ferroptosis. OA/PA increased the protein level of NCOA4. Knockdown of NCOA4 by SiRNA partly reversed the reduction in ferritin, mitigated iron overload...
Source: Free Radical Biology and Medicine - March 20, 2023 Category: Biology Authors: Mengying Zhu Lulu Peng Shengqi Huo Dewei Peng Junyi Gou Wei Shi Jingwen Tao Tao Jiang Yue Jiang Qian Wang Bingyu Huang Lintong Men Sheng Li Jiagao Lv Li Lin Source Type: research

Regulation of mitochondrial cristae remodelling by acetylcholine alleviates palmitate-induced cardiomyocyte hypertrophy.
This study investigated the role of cristae remodelling in palmitate (PA)-induced neonatal rat cardiomyocyte hypertrophy and explored the beneficial effects of ACh. We found loose, fragmented and even lysed cristae in PA-treated neonatal cardiomyocytes along with declines in mitochondrial network and complex expression and overproduction of mitochondrial reactive oxygen species (ROS); these changes ultimately resulted in increased myocardial size. Overexpression of mitofilin by adenoviral infection partly improved cristae shape, mitochondrial network, and ATP content and attenuated cell hypertrophy. Interestingly, siRNA-me...
Source: Free Radical Biology and Medicine - September 21, 2019 Category: Biology Authors: Xue RQ, Zhao M, Wu Q, Yang S, Cui YL, Yu XJ, Liu JK, Zang WJ Tags: Free Radic Biol Med Source Type: research

FoxO6-mediated IL-1β induces hepatic insulin resistance and age-related inflammation via the TF/PAR2 pathway in aging and diabetic mice
Publication date: Available online 3 April 2019Source: Redox BiologyAuthor(s): Dae Hyun Kim, Bonggi Lee, Jaewon Lee, Mi Eun Kim, Jun Sik Lee, Jae Heun Chung, Byung Pal Yu, H. Henry Dong, Hae Young ChungAbstractFoxO has been proposed to play a role in the promotion of insulin resistance, and inflammation. FoxO is a pro-inflammatory transcription factor that is a key mediator of generation of inflammatory cytokines such as IL-1β in the liver. However, the detailed association of FoxO6 with insulin resistance and age-related inflammation has not been fully documented. Here, we showed that FoxO6 was elevated in the livers of ...
Source: Redox Biology - April 4, 2019 Category: Biology Source Type: research

Activated Kupffer cells inhibit insulin sensitivity in obese mice Research Communication
Obesity promotes insulin resistance associated with liver inflammation, elevated glucose production, and type 2 diabetes. Although insulin resistance is attenuated in genetic mouse models that suppress systemic inflammation, it is not clear whether local resident macrophages in liver, denoted Kupffer cells (KCs), directly contribute to this syndrome. We addressed this question by selectively silencing the expression of the master regulator of inflammation, NF-B, in KCs in obese mice. We used glucan-encapsulated small interfering RNA particles (GeRPs) that selectively silence gene expression in macrophages in vivo. Followin...
Source: FASEB Journal - June 30, 2015 Category: Biology Authors: Tencerova, M., Aouadi, M., Vangala, P., Nicoloro, S. M., Yawe, J. C., Cohen, J. L., Shen, Y., Garcia-Menendez, L., Pedersen, D. J., Gallagher-Dorval, K., Perugini, R. A., Gupta, O. T., Czech, M. P. Tags: Research Communication Source Type: research

Cineromycin B isolated from Streptomyces cinerochromogenes inhibits adipocyte differentiation of 3T3-L1 cells via Krüppel-like factors 2 and 3
In this study, we sought to identify a unique anti-adipogenesis agent from microorganisms and to examine its mechanism of action to gain knowledge and create a tool and/or seed compound for anti-obesity drug discovery research. Main method Screening for anti-adipogenesis agents from microorganisms was performed using a 3T3-L1 cell differentiation system, and an active compound was isolated. The inhibitory mechanism of the compound was investigated by measuring the expression of key regulators using quantitative real-time PCR and Western blot analysis. Key findings The compound with anti-adipogenic activity in 3T3-L1 cell...
Source: Life Sciences - June 27, 2015 Category: Biology Source Type: research

Essential role of NRF2 in the protective effect of lipoic acid against lipoapoptosis in hepatocytes.
In conclusion, our work has revealed that in hepatocytes, Nrf2 is an essential early player in the rescue of oxidative stress by LA leading to protection against PA-mediated lipoapoptosis. PMID: 25841776 [PubMed - as supplied by publisher]
Source: Free Radical Biology and Medicine - April 1, 2015 Category: Biology Authors: Pilar Valdecantos M, Prieto-Hontoria PL, Pardo V, Módol T, Santamaría B, Weber M, Herrero L, Serra D, Muntané J, Cuadrado A, Moreno-Aliaga MJ, Alfredo Martínez J, Valverde ÁM Tags: Free Radic Biol Med Source Type: research

Adipose tissue regulates hepatic cholesterol metabolism via adiponectin
In this study, we examined the direct effects of adipocytes on hepatic cholesterol metabolic factors and investigated the role of potential adipocytokines in it. Main methods Male SD rats were induced by a high-fat diet (HFD) and hepatic cholesterol metabolic factors, 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGR) and ATP-binding cassette transporter A1 (ABCA1) were measured by immunoblotting. Then the effects of adipocytes on the expressions of hepatic cholesterol metabolism proteins were examined in the co-culture system. Finally, the concentrations of several adipocytokines were detected by ELISA and the effect of ad...
Source: Life Sciences - November 4, 2014 Category: Biology Source Type: research