TFEB promotes prostate cancer progression via regulating ABCA2-dependent lysosomal biogenesis
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE163761 | GEO | 2021/02/25
REPOSITORIES: GEO
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Project description:TFEB promotes prostate cancer progression via regulating ABCA2-dependent lysosomal biogenesis
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Project description:Transcription factor EB (TFEB), a member of the MiT family, is dysregulated in different cancers and exerts specific biological functions within the tumor microenvironment. Downregulation of TFEB induces macrophage polarization in the TME and promotes tumor progression. However, the biological role and clinical significance of TFEB in prostate cancer (PCa) remain unknown. This study aimed to identify the role of TFEB in PCa and its potential clinical value. We explored TFEB expression in PCa using public databases and verified its prognostic value using immunohistochemistry in PCa tissue samples. The results revealed that TFEB expression was up-regulated in PCa tissues and was associated with cancer metastasis. Next, overexpression of TFEB promoted PCa cell malignant behavior in in vivo and in vitro experiments. RNA-sequencing and bioinformatics analysis showed high expression of TFEB promoted lysosomal biogenesis and knockdown of TFEB expression decreased the number of lysosomes. Furthermore, the ATP-binding cassette transporter A2 (ABCA2) was identified as a target gene of TFEB, which was verified using the cleavage under targets and release using nuclease (CUT&RUN) assay and qRT-PCR. Silencing of ABCA2 reduced lysosomal biogenesis and decreased matrix metalloproteinases expression, which reduced PCa cell invasion and migration in the tumor microenvironment. Our study suggests that TFEB promotes PCa progression by regulating ABCA2 through lysosomal biogenesis and may serve as a prognostic factor or as a potential therapeutic target of PCa.
| S-EPMC7959325 | biostudies-literature
Project description:Because injured mitochondria can accelerate cell death through the elaboration of oxidative free radicals and other mediators, it is somewhat paradoxical that proliferator gamma coactivator 1-alpha (PGC1a), a stimulator of increased mitochondrial abundance, protects stressed renal cells instead of potentiating injury. Here we report that PGC1a’s induction of lysosomes via transcription factor EB (TFEB) may be pivotal for kidney protection. CRISPR and stable gene transfer showed that PGC1a knockout tubular cells were sensitized to the genotoxic stressor cisplatin whereas transgenic cells were protected. The biosensor mtKeima unexpectedly revealed that cisplatin blunts mitophagy both in cells and mice. PGC1a not only counteracted this effect but also raised basal mitophagy, as did the downstream mediator nicotinamide adenine dinucleotide (NAD+). PGC1a did not consistent affect known autophagy pathways modulated by cisplatin. Instead RNA sequencing identified coordinated regulation of lysosomal biogenesis via TFEB. This effector pathway was sufficiently important that inhibition of TFEB or lysosomes unveiled a striking harmful effect of excess PGC1a in cells and conditional mice. These results uncover an unexpected effect of cisplatin on mitophagy and PGC1a’s exquisite reliance on lysosomes for kidney protection. Finally, the data illuminate TFEB as a novel target for renal tubular stress resistance.
2019-06-10 | GSE126259 | GEO
Project description:Cells respond to mitochondrial energetic stress with rapid activation of the AMP-activated protein kinase (AMPK), which acutely inhibits anabolism and stimulates catabolism. AMPK also induces sustained transcriptional reprogramming of metabolism. The TFEB transcription factor is a major effector of AMPK signals, inducing lysosome genes following energetic stress. Yet the molecular mechanism underlying how AMPK activates TFEB remains unresolved. We demonstrate here that AMPK directly phosphorylates five conserved serine residues in FNIP1, which suppresses the function of the FLCN/FNIP1 RagC GAP complex, in turn controlling TFEB lysosomal localization. We demonstrate that FNIP1 phosphorylation is required for AMPK to induce nuclear translocation of TFEB, which is fully separable from AMPK control of canonical mTORC1 signaling. Using a non-phosphorylatable allele of FNIP1, we show that in parallel to lysosomal biogenesis, AMPK induces mitochondrial biogenesis via TFEB-dependent induction of PGC1a mRNA. This signaling from mitochondrial stress is also independent of amino-acid control of the Rags and TFEB, which still proceed normally in cells bearing the AMPK-non phosphorylatable allele of FNIP1. Taken together, mitochondrial energetic stress triggers AMPK/FNIP1-dependent TFEB nuclear translocation, inducing transcriptional waves of lysosomal and mitochondrial biogenesis.
2023-05-08 | GSE218827 | GEO
Project description:Autophagy is a cellular catabolic process that relies on the cooperation of autophagosomes and lysosomes. During starvation, the cell expands both compartments to enhance degradation processes. We found that starvation activates a transcriptional program that controls major steps of the autophagic pathway, including autophagosome formation, autophagosome-lysosome fusion, and substrate degradation. The transcription factor EB (TFEB), a master gene for lysosomal biogenesis, coordinated this program by driving expression of autophagy and lysosomal genes. Nuclear localization and activity of TFEB were regulated by serine phosphorylation mediated by the extracellular signal-regulated kinase 2, whose activity was tuned by the levels of extracellular nutrients. Thus, a mitogen-activated protein kinase-dependent mechanism regulates autophagy by controlling the biogenesis and partnership of two distinct cellular organelles.
| S-EPMC3638014 | biostudies-literature
Project description:Under homeostatic conditions, NRF2 is repressed by Kelch-like ECH-associated protein 1 (KEAP1). Here, we demonstrate that Keap1 deficiency induces Nrf2 activation and post-developmental lethality in zebrafish larvae. Loss of viability is preceded by severe liver abnormalities characterized by an accumulation of lysosomes. Mechanistically, we demonstrate that loss of Keap1 promotes aberrant activation of transcription factor EB (TFEB)/transcription factor binding to IGHM Enhancer 3 (TFE3)-dependent lysosomal biogenesis. Importantly, we find that NRF2-dependent regulation of lysosomal biogenesis is cell autonomous and evolutionarily conserved.
2023-04-30 | GSE230610 | GEO
Project description:Under homeostatic conditions, NRF2 is repressed by Kelch-like ECH-associated protein 1 (KEAP1). Here, we demonstrate that Keap1 deficiency induces Nrf2 activation and post-developmental lethality in zebrafish larvae. Loss of viability is preceded by severe liver abnormalities characterized by an accumulation of lysosomes. Mechanistically, we demonstrate that loss of Keap1 promotes aberrant activation of transcription factor EB (TFEB)/transcription factor binding to IGHM Enhancer 3 (TFE3)-dependent lysosomal biogenesis. Importantly, we find that NRF2-dependent regulation of lysosomal biogenesis is cell autonomous and evolutionarily conserved.
2023-04-30 | GSE230607 | GEO
Project description:Under homeostatic conditions, NRF2 is repressed by Kelch-like ECH-associated protein 1 (KEAP1). Here, we demonstrate that Keap1 deficiency induces Nrf2 activation and post-developmental lethality in zebrafish larvae. Loss of viability is preceded by severe liver abnormalities characterized by an accumulation of lysosomes. Mechanistically, we demonstrate that loss of Keap1 promotes aberrant activation of transcription factor EB (TFEB)/transcription factor binding to IGHM Enhancer 3 (TFE3)-dependent lysosomal biogenesis. Importantly, we find that NRF2-dependent regulation of lysosomal biogenesis is cell autonomous and evolutionarily conserved.
2023-04-30 | GSE230609 | GEO
Project description:Under homeostatic conditions, NRF2 is repressed by Kelch-like ECH-associated protein 1 (KEAP1). Here, we demonstrate that Keap1 deficiency induces Nrf2 activation and post-developmental lethality in zebrafish larvae. Loss of viability is preceded by severe liver abnormalities characterized by an accumulation of lysosomes. Mechanistically, we demonstrate that loss of Keap1 promotes aberrant activation of transcription factor EB (TFEB)/transcription factor binding to IGHM Enhancer 3 (TFE3)-dependent lysosomal biogenesis. Importantly, we find that NRF2-dependent regulation of lysosomal biogenesis is cell autonomous and evolutionarily conserved.
2023-04-30 | GSE230608 | GEO
Project description:The KEAP1-NRF2 pathway regulates TFEB/TFE3-dependent lysosomal biogenesis
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