AMPK activator O304 protects against kidney aging through promoting energy metabolism and autophagy
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA791683 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Energy homeostasis plays a key role in retarding aging, and mitochondria are responsible for energy production.AMPK plays a central role in maintaining energy homeostasis and mitochondrial homeostasis, and commands autophagy, a clearing and recycling process to maintain cellular homeostasis. However, the effect of AMPK activators on kidney aging has not been fully elucidated. We testified the effects of O304, a novel direct AMPK activator, in naturally aging mice model and D-galactose (D-gal)-treated renal tubular cell culture. We identified that O304 perfectly protects against cellular senescence and aged-related fibrosis in kidneys. Also, O304 restored energy metabolism, promoted autophagy, and preserved mitochondrial homeostasis. Transcriptomic sequencing also proved that O304 induced fatty acid metabolism, mitochondrial biogenesis and ATP process, and downregulated cell aging, DNA damage response and collagen organization. All these results suggest that O304 has a strong potential to retard aged kidney injury through regulating AMPK-induced multiple pathways.
2022-01-27 | GSE192512 | GEO
Project description:AMP-activated protein kinase (AMPK) stabilizes tubular cell metabolism and protects against renal fibrosis through promoting autophagy and mitochondrial homeostasis. Liver kinase B1 (LKB1) is the key regulator for AMPK activation. However, the direct activators of LKB1 are scarce in commercial. In this study, we report a novel LKB1 activator, the piericidin analogue S14 (PA-S14), which was isolated from the culture broth of a marine-derived Streptomyces strain by our group. PA-S14 binds with residue D176 in LKB1 kinase domain, and then induces LKB1 phosphorylated activation and its complex formation with MO25 and STRADα. Furthermore, PA-S14 promotes AMPK activation to enhance LC3B-II/LC3B-I ratio, trigger autophagosome formation and increase autophagic flux. PA-S14 exhibits perfect protective effects on stabilizing mitochondrial homeostasis, inhibiting tubular cell senescence, and retarding fibrogenesis in various CKD models (UUO, UIRI and adriamycin nephropathy models) and TGF-β-stimulated tubular cell culture. Transcriptomics sequencing and site-specific mutation analysis further prove that PA-S14 is a novel lead compound of LKB1 activator, which perfectly protects against renal fibrosis through inducing AMPK-mediated autophagy and mitochondrial homeostasis.
2022-10-26 | GSE193072 | GEO
Project description:AMP-activated protein kinase (AMPK) stabilizes tubular cell metabolism and protects against renal fibrosis through promoting autophagy and mitochondrial homeostasis. Liver kinase B1 (LKB1) is the key regulator for AMPK activation. However, the direct activators of LKB1 are scarce in commercial. In this study, we report a novel LKB1 activator, the piericidin analogue S14 (PA-S14), which was isolated from the culture broth of a marine-derived Streptomyces strain by our group. PA-S14 binds with residue D176 in LKB1 kinase domain, and then induces LKB1 phosphorylated activation and its complex formation with MO25 and STRADα. Furthermore, PA-S14 promotes AMPK activation to enhance LC3B-II/LC3B-I ratio, trigger autophagosome formation and increase autophagic flux. PA-S14 exhibits perfect protective effects on stabilizing mitochondrial homeostasis, inhibiting tubular cell senescence, and retarding fibrogenesis in various CKD models (UUO, UIRI and adriamycin nephropathy models) and TGF-β-stimulated tubular cell culture. Transcriptomics sequencing and site-specific mutation analysis further prove that PA-S14 is a novel lead compound of LKB1 activator, which perfectly protects against renal fibrosis through inducing AMPK-mediated autophagy and mitochondrial homeostasis.
2022-10-26 | GSE193067 | GEO
Project description:The AMP-activated protein kinase (AMPK) is a master sensor of the cellular energy status and is crucial for the adaptive response to limited energy availability. AMPK is implicated in the regulation of many cellular processes, including autophagy. However, the precise mechanisms by which AMPK controls these processes and the identities of relevant substrates are not fully understood. With a protein microarrays we identified Cyclin Y as novel AMPK substrate that is phosphorylated at S326 both in vitro and in cells. Phosphorylation of Cyclin Y at S326 promotes its interaction with the cyclin-dependent kinase 16 (CDK16), thereby stimulating its catalytic activity. When expressed in cells, Cyclin Y/CDK16 is sufficient to promote autophagy. Moreover, Cyclin Y/CDK16 is necessary for efficient AMPK-dependent activation of autophagy. This functional interaction is mediated by AMPK phosphorylating S326 of Cyclin Y. Collectively, we define Cyclin Y/CDK16 as downstream effector of AMPK for inducing autophagy.
2020-02-17 | PXD009968 | Pride
Project description:To investigate the functions of AMPK activation on maturation of hiPSC derived cardiomyocytes, we treated 3D hiPSC derived cardiomyocytes with AMPK activator EX229 at 10 µM for 7 days. Transcriptomic analyse was performed to identify molecular actions of AMPK activation.
2022-05-27 | GSE203480 | GEO
Project description:Background & Aims: Other than hepatitis B or C virus infection, Hepatitis E virus (HEV) infection is generally asymptomatic or leads to acute and self-limiting hepatitis. However, the mechanism of host cell defense against HEV is unclear. Viruses are known to perturb host cellular metabolism to enable their replication and spread. AMP-activated protein kinase (AMPK) activation is crucial for the regulation of cell homeostasis. We thus investigated the role of AMPK in HEV infection. Methods: Huh7, THP1 and HepG2 cells inoculated with infectious HEV viral particle or Huh7 and organoids transfected with in vitro generated subgenomic or full-length GT3 (Kernow-C1 p6 strain) HEV RNA, namely, p6Luc or p6 were used to model HEV infection. Viral replication and genes expression were quantified. Activation of AMPK, innate immune response and autophagy process were assessed. Results: We found HEV infection can trigger AMPK activation by phosphorylation of AMPK at threonine 172 by transfecting HEV viral RNA into host cells or inoculating host cells with infectious HEV viral particle. The activation of AMPK is associated with HEV induced mitochondrial damage and ATP deficiency. Pharmacological activation of AMPK using 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR) attenuated HEV replication, which was reversed by an AMPK inhibitor (compound C). Lentivirus-mediated knockdown of AMPK provided further evidence that AMPK has an antiviral effect on HEV replication. These results suggested that AMPK activation is a potent strategy of host cells for HEV clearance. Consistent with its antiviral effect, AMPK activation potentiated the expression of genes with antiviral properties (e.g., IFNs, ISG15, and IRF9) and inhibited inflammatory response (e.g., NF-KB NLRP3 and IL-1β). Meanwhile, HEV and activated AMPK also decreased autophagosome accumulation by decreasing induction of autophagy and autophagic degradation. Consistently, we found inhibition of AMPK efficiently augmented HEV induced autophagosome accumulation, evidenced by a marked increase in LC3II. Our previous study showed that rapamycin, an activator of autophagic induction by inhibiting mTOR, and Bafilomycin A1, an inhibitor of autophagic degradation, has a potent pro-HEV effect under AICAR treatment. Moreover, Wortmannin inhibiting autophagic induction recover AMPK inhibitor induced HEV replication. Together, these results suggested that HEV induced AMPK activation can serve to protect HEV infected cells from HEV infection by attenuating autophagosome and promoting innate immunity. Conclusions: Here we show that HEV infection can activate AMPK phosphorylation, which attenuates autophagosome accumulation and increases innate immune signaling. Thus, the AMPK activation in response to HEV infection is critical in host cells for rapid viral clearance by coordinating autophagic process and establishing persistent antiviral immunity.
2024-03-31 | GSE262469 | GEO
Project description:Autophagy is essential for cellular survival and energy homeostasis under nutrient deprivation. Despite the emerging importance of nuclear events in autophagy regulation, epigenetic control of autophagy gene transcription remains unclear. Here, we identify Jumonji-D3 (JMJD3/KDM6B) histone demethylase as a key epigenetic activator of hepatic autophagy. Upon fasting-induced fibroblast growth factor-21 (FGF21) signaling, JMJD3 epigenetically upregulated global autophagy-network genes, including Tfeb, Atg7, Atgl, and Fgf21, through demethylation of histone H3K27-me3, resulting in autophagy-mediated lipid degradation. Mechanistically, phosphorylation of JMJD3 at Thr-1044 by FGF21 signal-activated PKA increased its nuclear localization and interaction with the nuclear receptor PPARa to transcriptionally activate autophagy. Chronic administration of FGF21 in obese mice improved defective autophagy and hepatosteatosis in a JMJD3-dependent manner. Remarkably, in non-alcoholic fatty liver disease patients, hepatic expression of JMJD3, ATG7, LC3, and bKL were substantially decreased. These findings demonstrate that FGF21-JMJD3 signaling epigenetically links nutrient deprivation with hepatic autophagy and lipid degradation in mammals.
2019-09-18 | GSE137555 | GEO
Project description:<p>Energy stress depletes ATP and induces cell death. Here we identify an unexpected inhibitory role of energy stress on ferroptosis, a form of regulated cell death induced by iron-dependent lipid peroxidation. We found that ferroptotic cell death and lipid peroxidation can be inhibited by treatments that induce or mimic energy stress. Inactivation of AMP-activated protein kinase (AMPK), a sensor of cellular energy status, largely abolishes the protective effects of energy stress on ferroptosis in vitro and on ferroptosis-associated renal ischaemia-reperfusion injury in vivo. Cancer cells with high basal AMPK activation are resistant to ferroptosis and AMPK inactivation sensitizes these cells to ferroptosis. Functional and lipidomic analyses further link AMPK regulation of ferroptosis to AMPK-mediated phosphorylation of acetyl-CoA carboxylase and polyunsaturated fatty acid biosynthesis. Our study demonstrates that energy stress inhibits ferroptosis partly through AMPK and reveals an unexpected coupling between ferroptosis and AMPK-mediated energy-stress signalling.</p>
2023-01-31 | MTBLS1399 | MetaboLights
Project description:AMP-activated protein kinase (AMPK) is a major regulator of cellular energy homeostasis that coordinates metabolic pathways in order to balance nutrient supply with energy demand. AMPK elicits acute and diverse metabolic effects by directly phosphorylating various targets. AMPK activation also promotes metabolic reprogramming in longer term via effects on gene expression. The aim of this study is to elucidate molecular mechanism(s) by which AMPK activation modulates metabolic adaptation through its impact on gene regulation.
2019-03-04 | GSE104170 | GEO
Project description:We investigated the role of AMPK activation in the progression of senescence in HFDPCs. The anti-senescence effects of adenine, a recently identified AMPK activator, were determined in a comparison with AICAR, a pharmacological AMPK activator, in HFDPCs. The results showed that either adenine or AICAR induced phosphorylation of Thr172 of AMPK in HFDPCs. As revealed by microarray analysis, significant changes of gene expression pattern were observed in the high-passage HFDPCs compared with that at lower passage level. A chip study using total RNA recovered from three separate wild-type cultures of Human follicle dermal papilla cells (HFDPCs) and three separate cultures of a triple adenine-treated cells.
2014-11-01 | E-GEOD-62798 | biostudies-arrayexpress