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Specialty: Biology
Condition: Diabetes
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Total 42 results found since Jan 2013.
Metformin protects against retinal ischemia/reperfusion injury through AMPK-mediated mitochondrial fusion
This study aims to evaluate the protective effect of metformin against retinal I/R injury and its underlying mechanism. I/R induced reduction in retina thickness and cell number in ganglion cell layer, and metformin alleviated I/R-induced retinal injury. Both retinal I/R and simulated ischemia/reperfusion (SIR) in R28 cells down-regulated expression of mitochondrial fusion protein Mfn2 and OPA1, which led to mitochondrial fission. Metformin also alleviated damage in R28 cells, and reversed the alteration in Mfn2 and OPA1, mitochondrial fission and mitochondrial membrane potential (MMP) disruption-induced by I/R or SIR as w...
Source: Free Radical Biology and Medicine - May 30, 2023 Category: Biology Authors: Kun Zhang Tao Wang Gui-Feng Sun Jin-Xing Xiao Li-Ping Jiang Fang-Fang Tou Xin-Hui Qu Xiao-Jian Han Source Type: research
P2X7R/AKT/mTOR signaling mediates high glucose-induced decrease in podocyte autophagy
We examined the expression of all purinergic receptors in the renal cortex and found that only purinergic P2X7 receptor (P2X7R) expression was significantly increased in the renal cortex of wild-type diabetic mice and that the P2X7R protein partially co-localized with podocytes. Compared with P2X7R(-/-) non-diabetic mice, P2X7R(-/-) diabetic mice showed stable expression of the podocyte marker protein podocin in the renal cortex. The renal expression of microtubule associated protein 1A/1B light chain 3 (LC-3II) in wild-type diabetic mice was significantly lower than in wild-type controls, whereas the expression of LC-3II ...
Source: Free Radical Biology and Medicine - May 28, 2023 Category: Biology Authors: Cheng Qian Jiayue Lu Xiajing Che Lulin Min Minzhou Wang Ahui Song Renhua Lu Leyi Gu Kewei Xie Source Type: research
Astragaloside IV attenuates podocyte apoptosis through ameliorating mitochondrial dysfunction by up-regulated Nrf2-ARE/TFAM signaling in diabetic kidney disease
In this study, using molecular docking we found that Astragaloside IV (AS-IV), an active ingredient from traditional formula of Huangqi decoction (HQD), exerted a higher potential to promote Nrf2 escape from Keap1-Nrf2 interaction via competitively bind to amino acid sites in Keap1. When podocyte exposed to high glucose (HG) stimulation, mitochondrial morphological alterations and podocyte apoptosis were presented and accompanied by Nrf2 and mitochondrial transcription factor A (TFAM) downregulation. Mechanistically, HG promoted a decrease in mitochondria-specific electron transport chain (ETC) complexes, ATP synthesis and...
Source: Free Radical Biology and Medicine - April 8, 2023 Category: Biology Authors: Qian Shen Ji Fang Hengjiang Guo Xue Su Bingbing Zhu Xingmei Yao Yunman Wang Aili Cao Hao Wang Li Wang Source Type: research
ZnT8 Exerts Anti-apoptosis of Kidney Tubular Epithelial Cell in Diabetic Kidney Disease Through TNFAIP3-NF- κB Signal Pathways
Biol Trace Elem Res. 2022 Jul 23. doi: 10.1007/s12011-022-03361-w. Online ahead of print.ABSTRACTApoptosis of kidney tubular epithelial cells contributes to diabetic kidney disease (DKD) pathophysiology, but the mechanisms are not fully understood. Zinc transporter protein member 8 (ZnT8, SLC30A8) is a susceptive gene in diabetes. Here, we aim to investigate whether ZnT8 has effects on pathophysiology of DKD. The animal groups include control, ZnT8KO mice, STZ-induced, and ZnT8-KO-STZ. STZ-induced DKD was performed in male C57BL/6 J mice and in ZnT8-KO mice. High glucose (HG)-induced apoptosis in a normal rat kidney tubula...
Source: Biological Trace Element Research - July 23, 2022 Category: Biology Authors: Yinmao Chi Xiuli Zhang Dan Liang Yue Wang Xiaoyi Cai Jiqiu Dong Lingzhi Li Zhihong Chi Source Type: research
The stress response protein REDD1 as a causal factor for oxidative stress in diabetic retinopathy.
Abstract
Diabetic Retinopathy (DR) is a major cause of visual dysfunction, yet much remains unknown regarding the specific molecular events that contribute to diabetes-induced retinal pathophysiology. Herein, we review the impact of oxidative stress on DR, and explore evidence that supports a key role for the stress response protein regulated in development and DNA damage (REDD1) in the development of diabetes-induced oxidative stress and function defects in vision. It is well established that REDD1 mediates the cellular response to a number of diverse stressors through repression of the central metabolic regulato...
Source: Free Radical Biology and Medicine - January 29, 2021 Category: Biology Authors: Miller WP, Sunilkumar S, Dennis MD Tags: Free Radic Biol Med Source Type: research
Angelica dahurica promoted angiogenesis and accelerated wound healing in db/db mice via the HIF-1 α/PDGF-β signaling pathway.
In this study, we found that Angelica dahurica (A. dahurica) stimulated angiogenesis and benefited wound healing in genetic mouse models of diabetes. In HUVECs, A. dahurica promoted cell proliferation and tube formation, which was accompanied by increased nuclear translocation of HIF-1α under hypoxic conditions and led to elevated PDGF-β protein expression. A. dahurica activated the PI3K/AKT signaling pathway in human umbilical vein endothelial cells (HUVECs), which was abrogated by the PI3K inhibitor LY294002. Furthermore, the cellular expression of PDGF-β decreased significantly after treatment with a HIF-1α-siRNA, a...
Source: Free Radical Biology and Medicine - August 23, 2020 Category: Biology Authors: Guo J, Hu Z, Yan F, Lei S, Li T, Li X, Xu C, Sun B, Pan C, Chen L Tags: Free Radic Biol Med Source Type: research
HMGB1 upregulates NF-kB by inhibiting IKB-α and associates with diabetic retinopathy
This study aimed to investigate the effect of high-mobility group box 1 (HMGB1) protein and its mechanism in diabetic retinopathy (DR) were investigated.Main methodsHuman retinal endothelial cells (HREC) were uesd for chip-seq. Sprague Dawley (SD) rats were randomly divided into control group, HMGB1 group, diabetes mellitus (DM) combined with HMGB1 siRNA group, and DM group. Next, eyeballs were removed and retinas were detached for western blot. The DM model of cell was built by increasing the glucose concentration in cell culture medium. The regulation of HMGB1 was achieved by short hairpin (sh)-HMGB1 transfection, then, ...
Source: Life Sciences - December 7, 2019 Category: Biology Source Type: research
HMGB1/TLR4 promotes apoptosis and reduces autophagy of hippocampal neurons in diabetes combined with OSA
In conclusion, IH aggravated apoptosis and autophagy defects in T2DM mice, and increased the protein expression of HMGB1 and TLR4. This was also confirmed in HG +IH-treated hippocampal HT22 cells. HMGB1 siRNA can significantly reduce the protein expression of HMGB1 and TLR4, reverse neuronal apoptosis and enhance autophagy.SignificanceWe believe that HMGB1 is a key factor in the regulation of hippocampal neuronal apoptosis and autophagy defects in T2DM combined with OSA. Targeting HMGB1/TLR4 signaling as a novel approach may delay or prevent the increased apoptosis and decreased autophagy induced by T2DM combined with OSA,...
Source: Life Sciences - November 1, 2019 Category: Biology Source Type: research
Mitochondrial pyruvate carrier 2 mediates mitochondrial dysfunction and apoptosis in high glucose-treated podocytes
Publication date: Available online 10 October 2019Source: Life SciencesAuthor(s): Jun Feng, Yiqiong Ma, Zhaowei Chen, Jijia Hu, Qian Yang, Guohua DingAbstractAimsPodocytes play an important role in the development of diabetic kidney disease (DKD). Mitochondria are the source of energy for cell survival, and mitochondrial abnormalities have been shown to contribute to podocyte injury in DKD. In high glucose (HG)-treated podocytes, mitochondrial function and dynamics are abnormal, and intracellular metabolism is often disrupted. However, the molecular mechanism is still unclear. Mitochondrial pyruvate carrier 2 (MPC2) mediat...
Source: Life Sciences - October 10, 2019 Category: Biology Source Type: research
Klotho improves diabetic cardiomyopathy by suppressing the NLRP3 inflammasome pathway
Publication date: Available online 15 August 2019Source: Life SciencesAuthor(s): Xuelian Li, Zhiyang Li, Bingong Li, Xianjie Zhu, Xingjun LaiAbstractAimsNLRP3 inflammasome activation is essential for the development and prognosis of diabetic cardiomyopathy (DCM). The anti-aging protein Klotho is suggested to modulate tissue inflammatory responses. The aim of the present study was to examine the protective effects of Klotho on DCM.Main methodsA streptozotocin-induced diabetes mouse model was established to assess the effects of Klotho in vivo, which was administered for 12 weeks. The characteristics of type 1 DCM were eva...
Source: Life Sciences - August 18, 2019 Category: Biology 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
