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Wang Y, Dang H, Qiao H, Tian Y, Guan Q. PDP1 promotes the progression of breast cancer through STAT3 pathway. Cell Biochem Funct 2024; 42:e3994. [PMID: 38566355 DOI: 10.1002/cbf.3994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/27/2024] [Accepted: 03/11/2024] [Indexed: 04/04/2024]
Abstract
This study aimed to investigate the expression pattern and mechanisms of Pyruvate Dehydrogenase Phosphatase Catalytic Subunit 1 (PDP1) in the progression of breast cancer (BC). PDP1, known for its involvement in cell energy metabolism, was found to be overexpressed in BC tissues. Notably, low PDP1 expression aligns with improved overall survival (OS) in BC patients. In this study, we found that PDP1 was overexpressed among BC tissues and low PDP1 expression showed a better prognosis for the patients with BC. PDP1 knockdown suppressed cell amplification and migration and triggered cell apoptosis in BC cells. In vivo assessments through a xenograft model unveiled the pivotal role and underlying mechanisms of PDP1 knockdown. RNA sequencing and kyoto encyclopedia of genes and genomes analysis of RNAs from PDP1 knockdown and normal MCF7 cells revealed 1440 differentially expressed genes, spotlighting the involvement of the JAK/STAT3 signaling pathway in BC progression. Western blot results implied that PDP1 knockdown led to a loss of p-STAT3, whereas overexpression of PDP1 induced the p-STAT3 expression. Cell counting kit-8 assay showed that PDP1 overexpression significantly raised MDA-MB-231 and MCF7 cell viability while STAT3 inhibitor S3I-201 recovered the cell growth to normal level. To summarize, PDP1 promotes the progression of BC through STAT3 pathway by regulating p-STAT3. The findings contribute to understanding the molecular mechanisms underlying BC progression, and opening avenues for targeted therapeutic approaches.
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Affiliation(s)
- Yufeng Wang
- Department of the First Clinical Medical College, Lanzhou University, Lanzhou, China
- Department of Oncology, Tumor Hospital of Gansu Province, Lanzhou, China
| | - Huifen Dang
- Department of Oncology, Tumor Hospital of Gansu Province, Lanzhou, China
| | - Hui Qiao
- Department of Oncology Surgery, The First Hospital of Lanzhou University, Lanzhou, China
| | - Yinxia Tian
- Department of Oncology, Tumor Hospital of Gansu Province, Lanzhou, China
| | - Quanlin Guan
- Department of Oncology Surgery, The First Hospital of Lanzhou University, Lanzhou, China
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Karagiota A, Kanoura A, Paraskeva E, Simos G, Chachami G. Pyruvate dehydrogenase phosphatase 1 ( PDP1) stimulates HIF activity by supporting histone acetylation under hypoxia. FEBS J 2022; 290:2165-2179. [PMID: 36453802 DOI: 10.1111/febs.16694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 10/13/2022] [Accepted: 11/29/2022] [Indexed: 12/02/2022]
Abstract
Cancer cells, when exposed to the hypoxic tumour microenvironment, respond by activating hypoxia-inducible factors (HIFs). HIF-1 mediates extensive metabolic re-programming, and expression of HIF-1α, its oxygen-regulated subunit, is associated with poor prognosis in cancer. Here we analyse the role of pyruvate dehydrogenase phosphatase 1 (PDP1) in the regulation of HIF-1 activity. PDP1 is a key hormone-regulated metabolic enzyme that dephosphorylates and activates pyruvate dehydrogenase (PDH), thereby stimulating the conversion of pyruvate into acetyl-CoA. Silencing of PDP1 down-regulated HIF transcriptional activity and the expression of HIF-dependent genes, including that of PDK1, the kinase that phosphorylates and inactivates PDH, opposing the effects of PDP1. Inversely, PDP1 stimulation enhanced HIF activity under hypoxia. Alteration of PDP1 levels or activity did not have an effect on HIF-1α protein levels, nuclear accumulation or interaction with its partners ARNT and NPM1. However, depletion of PDP-1 decreased histone H3 acetylation of HIF-1 target gene promoters and inhibited binding of HIF-1 to the respective hypoxia-response elements (HREs) under hypoxia. Furthermore, the decrease of HIF transcriptional activity upon PDP1 depletion could be reversed by treating the cells with acetate, as an exogenous source of acetyl-CoA, or the histone deacetylase (HDAC) inhibitor trichostatin A. These data suggest that the PDP1/PDH/HIF-1/PDK1 axis is part of a homeostatic loop which, under hypoxia, preserves cellular acetyl-CoA production to a level sufficient to sustain chromatin acetylation and transcription of hypoxia-inducible genes.
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Affiliation(s)
- Angeliki Karagiota
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis, Larissa, Greece.,Laboratory of Physiology, Faculty of Medicine, University of Thessaly, Biopolis, Larissa, Greece
| | - Amalia Kanoura
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis, Larissa, Greece
| | - Efrosyni Paraskeva
- Laboratory of Physiology, Faculty of Medicine, University of Thessaly, Biopolis, Larissa, Greece
| | - George Simos
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis, Larissa, Greece.,Gerald Bronfman Department of Oncology, Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Georgia Chachami
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis, Larissa, Greece
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Feng X, Lu J, Wu Y, Xu H. MiR-18a-3p improves cartilage matrix remodeling and inhibits inflammation in osteoarthritis by suppressing PDP1. J Physiol Sci 2022; 72:3. [PMID: 35148687 PMCID: PMC10717587 DOI: 10.1186/s12576-022-00827-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 01/19/2022] [Indexed: 01/15/2023]
Abstract
Osteoarthritis (OA) is a degenerative disease characterized by synovial inflammation. MiR-18a-3p was reported to be downregulated in knee anterior cruciate ligament of OA patients. In the present study, the specific functions and mechanism of miR-18a-3p in OA were explored. An in vitro model of OA was established using 10 ng/ml IL-1β to treat ATDC5 cells, and medial meniscus instability surgery was performed on Wistar rats to establish in vivo rat model of OA. RT-qPCR revealed that miR-18a-3p was downregulated in IL-1β-stimulated ATDC5 cells. MiR-18a-3p overexpression inhibited secretion of inflammatory cytokines and concentration of matrix metalloproteinases, as shown by ELISA and western blotting. The binding relation between miR-18a-3p and pyruvate dehydrogenase phosphatase catalytic subunit 1 (PDP1) was detected by luciferase reporter assays. MiR-18a-3p targeted PDP1 and negatively regulated PDP1 expression. Results of rescue assays revealed that PDP1 upregulation reserved the suppressive effect of miR-18a-3p overexpression on levels of inflammatory cytokines and matrix metalloproteinases in IL-1β-stimulated ATDC5 cells. H&E staining was used to observe pathological changes of synovial tissues in the knee joint of Wistar rats. Safranin O-fast green/hematoxylin was used to stain cartilage samples of knee joints. MiR-18a-3p overexpression suppressed OA progression in vivo. Overall, miR-18a-3p improves cartilage matrix remodeling and suppresses inflammation in OA by targeting PDP1.
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Affiliation(s)
- Xiaoguang Feng
- Department of Orthopedics, Changzhou Cancer Hospital Affiliated to Soochow University, No.68 Honghe Road, Xinbei District, Changzhou, 213000, Jiangsu, China
| | - Jiajun Lu
- Department of Orthopedics, Changzhou Cancer Hospital Affiliated to Soochow University, No.68 Honghe Road, Xinbei District, Changzhou, 213000, Jiangsu, China
| | - Yixiong Wu
- Department of Orthopedics, Changzhou Cancer Hospital Affiliated to Soochow University, No.68 Honghe Road, Xinbei District, Changzhou, 213000, Jiangsu, China
| | - Haiyun Xu
- Department of Orthopedics, Changzhou Cancer Hospital Affiliated to Soochow University, No.68 Honghe Road, Xinbei District, Changzhou, 213000, Jiangsu, China.
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Bertolini E, Schubert FK, Zanini D, Sehadová H, Helfrich-Förster C, Menegazzi P. Life at High Latitudes Does Not Require Circadian Behavioral Rhythmicity under Constant Darkness. Curr Biol 2019; 29:3928-3936.e3. [PMID: 31679928 DOI: 10.1016/j.cub.2019.09.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 08/13/2019] [Accepted: 09/12/2019] [Indexed: 01/08/2023]
Abstract
Nearly all organisms evolved endogenous self-sustained timekeeping mechanisms to track and anticipate cyclic changes in the environment. Circadian clocks, with a periodicity of about 24 h, allow animals to adapt to day-night cycles. Biological clocks are highly adaptive, but strong behavioral rhythms might be a disadvantage for adaptation to weakly rhythmic environments such as polar areas [1, 2]. Several high-latitude species, including Drosophila species, were found to be highly arrhythmic under constant conditions [3-6]. Furthermore, Drosophila species from subarctic regions can extend evening activity until dusk under long days. These traits depend on the clock network neurochemistry, and we previously proposed that high-latitude Drosophila species evolved specific clock adaptations to colonize polar regions [5, 7, 8]. We broadened our analysis to 3 species of the Chymomyza genus, which diverged circa 5 million years before the Drosophila radiation [9] and colonized both low and high latitudes [10, 11]. C. costata, pararufithorax, and procnemis, independently of their latitude of origin, possess the clock neuronal network of low-latitude Drosophila species, and their locomotor activity does not track dusk under long photoperiods. Nevertheless, the high-latitude C. costata becomes arrhythmic under constant darkness (DD), whereas the two low-latitude species remain rhythmic. Different mechanisms are behind the arrhythmicity in DD of C. costata and the high-latitude Drosophila ezoana, suggesting that the ability to maintain behavioral rhythms has been lost more than once during drosophilids' evolution and that it might indeed be an evolutionary adaptation for life at high latitudes.
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Affiliation(s)
- Enrico Bertolini
- Neurobiology and Genetics, Theodor Boveri Institute, Biocentre, University of Würzburg, 97074 Würzburg, Germany
| | - Frank K Schubert
- Neurobiology and Genetics, Theodor Boveri Institute, Biocentre, University of Würzburg, 97074 Würzburg, Germany
| | - Damiano Zanini
- Neurobiology and Genetics, Theodor Boveri Institute, Biocentre, University of Würzburg, 97074 Würzburg, Germany
| | - Hana Sehadová
- Faculty of Science, Biology Centre of the Czech Academy of Sciences, Institute of Entomology and University of South Bohemia, 37005 Ceske Budejovice, Czech Republic
| | - Charlotte Helfrich-Förster
- Neurobiology and Genetics, Theodor Boveri Institute, Biocentre, University of Würzburg, 97074 Würzburg, Germany
| | - Pamela Menegazzi
- Neurobiology and Genetics, Theodor Boveri Institute, Biocentre, University of Würzburg, 97074 Würzburg, Germany.
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Bedoyan JK, Hecht L, Zhang S, Tarrant S, Bergin A, Demirbas D, Yang E, Shin HK, Grahame GJ, DeBrosse SD, Hoppel CL, Kerr DS, Berry GT. A novel null mutation in the pyruvate dehydrogenase phosphatase catalytic subunit gene ( PDP1) causing pyruvate dehydrogenase complex deficiency. JIMD Rep 2019; 48:26-35. [PMID: 31392110 PMCID: PMC6606986 DOI: 10.1002/jmd2.12054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/21/2019] [Accepted: 05/22/2019] [Indexed: 01/03/2023] Open
Abstract
Congenital lactic acidosis due to pyruvate dehydrogenase phosphatase (PDP) deficiency is very rare. PDP regulates pyruvate dehydrogenase complex (PDC) and defective PDP leads to PDC deficiency. We report a case with functional PDC deficiency with low activated (+dichloroacetate) and inactivated (+fluoride) PDC activities in lymphocytes and fibroblasts, normal activity of other mitochondrial enzymes in fibroblasts, and novel biallelic frameshift mutation in the PDP1 gene, c.575dupT (p.L192FfsX5), with absent PDP1 product in fibroblasts. Unexpectedly, the patient also had low branched-chain 2-ketoacid dehydrogenase (BCKDH) activity in fibroblasts with slight elevation of branched-chain amino acids in plasma and ketoacids in urine but with no pathogenic mutations in the enzymes of BCKDH, which could suggest shared regulatory function of PDC and BCKDH in fibroblasts, potentially in other tissues or cell types as well, but this remains to be determined. The clinical presentation of this patient overlaps that of other patients with primary-specific PDC deficiency, with neonatal/infantile and childhood lactic acidosis, normal lactate to pyruvate ratio, elevated plasma alanine, delayed psychomotor development, epileptic encephalopathy, feeding difficulties, and hypotonia. This patient exhibited marked improvement of overall development following initiation of ketogenic diet at 31 months of age. To the best of our knowledge, this is the fourth case of functional PDC deficiency with a defined mutation in PDP1. SYNOPSIS Pyruvate dehydrogenase phosphatase (PDP) regulates pyruvate dehydrogenase complex (PDC) and defective PDP due to PDP1 mutations leads to PDC deficiency and congenital lactic acidosis.
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Affiliation(s)
- Jirair K. Bedoyan
- Department of Genetics and Genome SciencesCase Western Reserve University (CWRU)ClevelandOhio
- PediatricsCase Western Reserve University (CWRU)ClevelandOhio
- Center for Human GeneticsUniversity Hospitals Cleveland Medical Center (UHCMC)ClevelandOhio
- Center for Inherited Disorders of Energy Metabolism (CIDEM)University Hospitals Cleveland Medical Center (UHCMC)ClevelandOhio
| | - Leah Hecht
- Division of Genetics and Genomics, The Manton Center for Orphan Disease ResearchBoston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Shulin Zhang
- Pathology and Laboratory MedicineUniversity of KentuckyLexingtonKentucky
| | - Stacey Tarrant
- Division of Genetics and Genomics, The Manton Center for Orphan Disease ResearchBoston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Ann Bergin
- Department of NeurologyBoston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Didem Demirbas
- Division of Genetics and Genomics, The Manton Center for Orphan Disease ResearchBoston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Edward Yang
- RadiologyBoston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
| | - Ha Kyung Shin
- School of MedicineCase Western Reserve University (CWRU)ClevelandOhio
| | - George J. Grahame
- Center for Inherited Disorders of Energy Metabolism (CIDEM)University Hospitals Cleveland Medical Center (UHCMC)ClevelandOhio
| | - Suzanne D. DeBrosse
- Department of Genetics and Genome SciencesCase Western Reserve University (CWRU)ClevelandOhio
- PediatricsCase Western Reserve University (CWRU)ClevelandOhio
- Center for Human GeneticsUniversity Hospitals Cleveland Medical Center (UHCMC)ClevelandOhio
| | - Charles L. Hoppel
- Center for Inherited Disorders of Energy Metabolism (CIDEM)University Hospitals Cleveland Medical Center (UHCMC)ClevelandOhio
- MedicineCase Western Reserve University (CWRU)ClevelandOhio
- PharmacologyCase Western Reserve University (CWRU)ClevelandOhio
| | - Douglas S. Kerr
- PediatricsCase Western Reserve University (CWRU)ClevelandOhio
- Center for Inherited Disorders of Energy Metabolism (CIDEM)University Hospitals Cleveland Medical Center (UHCMC)ClevelandOhio
| | - Gerard T. Berry
- Division of Genetics and Genomics, The Manton Center for Orphan Disease ResearchBoston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
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