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Kociemba J, Jørgensen ACS, Tadić N, Harris A, Sideri T, Chan WY, Ibrahim F, Ünal E, Skehel M, Shahrezaei V, Argüello-Miranda O, van Werven FJ. Multi-signal regulation of the GSK-3β homolog Rim11 controls meiosis entry in budding yeast. EMBO J 2024; 43:3256-3286. [PMID: 38886580 PMCID: PMC11294583 DOI: 10.1038/s44318-024-00149-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 04/22/2024] [Accepted: 05/27/2024] [Indexed: 06/20/2024] Open
Abstract
Starvation in diploid budding yeast cells triggers a cell-fate program culminating in meiosis and spore formation. Transcriptional activation of early meiotic genes (EMGs) hinges on the master regulator Ime1, its DNA-binding partner Ume6, and GSK-3β kinase Rim11. Phosphorylation of Ume6 by Rim11 is required for EMG activation. We report here that Rim11 functions as the central signal integrator for controlling Ume6 phosphorylation and EMG transcription. In nutrient-rich conditions, PKA suppresses Rim11 levels, while TORC1 retains Rim11 in the cytoplasm. Inhibition of PKA and TORC1 induces Rim11 expression and nuclear localization. Remarkably, nuclear Rim11 is required, but not sufficient, for Rim11-dependent Ume6 phosphorylation. In addition, Ime1 is an anchor protein enabling Ume6 phosphorylation by Rim11. Subsequently, Ume6-Ime1 coactivator complexes form and induce EMG transcription. Our results demonstrate how various signaling inputs (PKA/TORC1/Ime1) converge through Rim11 to regulate EMG expression and meiosis initiation. We posit that the signaling-regulatory network elucidated here generates robustness in cell-fate control.
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Affiliation(s)
- Johanna Kociemba
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Andreas Christ Sølvsten Jørgensen
- Department of Mathematics, Imperial College London, London, SW7 2BX, UK
- I-X Centre for AI In Science, Imperial College London, White City Campus, 84 Wood Lane, London, W12 0BZ, UK
| | - Nika Tadić
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, 27695-7612, USA
| | - Anthony Harris
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Theodora Sideri
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Wei Yee Chan
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Fairouz Ibrahim
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Elçin Ünal
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Mark Skehel
- The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Vahid Shahrezaei
- Department of Mathematics, Imperial College London, London, SW7 2BX, UK.
| | - Orlando Argüello-Miranda
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, 27695-7612, USA.
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2
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Wang T, Wang G, Shan D, Fang Y, Zhou F, Yu M, Ju L, Li G, Xiang W, Qian K, Zhang Y, Xiao Y, Wang X. ACAT1 promotes proliferation and metastasis of bladder cancer via AKT/GSK3β/c-Myc signaling pathway. J Cancer 2024; 15:3297-3312. [PMID: 38817856 PMCID: PMC11134450 DOI: 10.7150/jca.95549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 04/08/2024] [Indexed: 06/01/2024] Open
Abstract
Acetyl-CoA acetyltransferase 1 (ACAT1) plays a significant role in the regulation of gene expression and tumorigenesis. However, the biological role of ACAT1 in bladder cancer (BLCA) has yet to be elucidated. This research aimed to elucidate the bioinformatics features and biological functions of ACAT1 in BLCA. Here, we demonstrate that ACAT1 is elevated in BLCA tissues and is correlated with specific clinicopathological features and an unfavorable prognosis for survival in BLCA patients. ACAT1 was identified as an independent risk factor in BLCA. Phenotypically, both in vitro and in vivo, ACAT1 knockdown suppressed BLCA cell proliferation and migration, while ACAT1 overexpression had the opposite effect. Mechanistic assays revealed that ACAT1 enhances BLCA cell proliferation and metastasis through the AKT/GSK3β/c-Myc signaling pathway by modulating the cell cycle and EMT. Taken together, the results of our study reveal that ACAT1 is an oncogenic driver in BLCA that enhances tumor proliferation and metastasis, indicating its potential as a diagnostic and therapeutic target for this disease.
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Affiliation(s)
- Tingjun Wang
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Gang Wang
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Danni Shan
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yayun Fang
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Fenfang Zhou
- Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Mengxue Yu
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Lingao Ju
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Gang Li
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wan Xiang
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Kaiyu Qian
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yi Zhang
- Euler Technology, ZGC Life Sciences Park, Beijing, China
- Center for Quantitative Biology, School of Life Sciences, Peking University, Beijing, China
| | - Yu Xiao
- Department of Biological Repositories, Human Genetic Resources Preservation Center of Hubei Province, Hubei Key Laboratory of Urological Diseases, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xinghuan Wang
- Department of Urology, Laboratory of Precision Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
- Medical Research Institute, Frontier Science Center for Immunology and Metabolism, Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan, China
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3
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Nicolás-Morala J, Alonso-Juarranz M, Barahona A, Terrén S, Cabezas S, Falahat F, Gilaberte Y, Gonzalez S, Juarranz A, Mascaraque M. Comparative response to PDT with methyl-aminolevulinate and temoporfin in cutaneous and oral squamous cell carcinoma cells. Sci Rep 2024; 14:7025. [PMID: 38528037 DOI: 10.1038/s41598-024-57624-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 03/20/2024] [Indexed: 03/27/2024] Open
Abstract
Cutaneous and Head and Neck squamous cell carcinoma (CSCC, HNSCC) are among the most prevalent cancers. Both types of cancer can be treated with photodynamic therapy (PDT) by using the photosensitizer Temoporfin in HNSCC and the prodrug methyl-aminolevulinate (MAL) in CSCC. However, PDT is not always effective. Therefore, it is mandatory to correctly approach the therapy according to the characteristics of the tumour cells. For this reason, we have used cell lines of CSCC (A431 and SCC13) and HNSCC (HN5 and SCC9). The results obtained indicated that the better response to MAL-PDT was related to its localization in the plasma membrane (A431 and HN5 cells). However, with Temoporfin all cell lines showed lysosome localization, even the most sensitive ones (HN5). The expression of mesenchymal markers and migratory capacity was greater in HNSCC lines compared to CSCC, but no correlation with PDT response was observed. The translocation to the nucleus of β-catenin and GSK3β and the activation of NF-κβ is related to the poor response to PDT in the HNSCC lines. Therefore, we propose that intracellular localization of GSK3β could be a good marker of response to PDT in HNSCC. Although the molecular mechanism of response to PDT needs further elucidation, this work shows that the most MAL-resistant line of CSCC is more sensitive to Temoporfin.
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Affiliation(s)
- J Nicolás-Morala
- Department of Biology, Universidad Autónoma de Madrid, Madrid, Spain
- Department of Experimental Dermatology and Skin Biology, Instituto Ramón y Cajal de Investigación Sanitaria, IRYCIS, 28034, Madrid, Spain
| | - M Alonso-Juarranz
- Oral and Maxillofacial Surgery Service, Hospital Clínico San Carlos, 28040, Madrid, Spain
- Surgery Department, Faculty of Medicine, Universidad Complutense, 28040, Madrid, Spain
| | - A Barahona
- Department of Biology, Universidad Autónoma de Madrid, Madrid, Spain
| | - S Terrén
- Department of Biology, Universidad Autónoma de Madrid, Madrid, Spain
| | - S Cabezas
- Oncology Service, Hospital Clínico San Carlos, 28040, Madrid, Spain
| | - F Falahat
- Oral and Maxillofacial Surgery Service, Hospital Clínico San Carlos, 28040, Madrid, Spain
- Surgery Department, Faculty of Medicine, Universidad Complutense, 28040, Madrid, Spain
| | - Y Gilaberte
- Department of Dermatology, Miguel Servet University Hospital, Instituto Investigación Sanitaria (IIS), Zaragoza, Aragón, Spain
| | - S Gonzalez
- Department of Experimental Dermatology and Skin Biology, Instituto Ramón y Cajal de Investigación Sanitaria, IRYCIS, 28034, Madrid, Spain
- Department of Medicine and Medical Specialties, Universidad de Alcalá, Madrid, Spain
| | - A Juarranz
- Department of Biology, Universidad Autónoma de Madrid, Madrid, Spain.
- Department of Experimental Dermatology and Skin Biology, Instituto Ramón y Cajal de Investigación Sanitaria, IRYCIS, 28034, Madrid, Spain.
| | - M Mascaraque
- Department of Biology, Universidad Autónoma de Madrid, Madrid, Spain.
- Department of Experimental Dermatology and Skin Biology, Instituto Ramón y Cajal de Investigación Sanitaria, IRYCIS, 28034, Madrid, Spain.
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Rafiq A, Aashaq S, Jan I, Ali M, Rakshan R, Bashir A, Haq E, Beigh MA. GSK3β phosphorylates Six1 transcription factor and regulates its APC/C Cdh1 mediated proteosomal degradation. Cell Signal 2024; 115:111030. [PMID: 38163577 DOI: 10.1016/j.cellsig.2023.111030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/19/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
Sine oculis homeobox homolog 1 (Six1) is a developmentally important transcription factor that regulates cellular proliferation, apoptosis, and dissemination during embryogenesis. Six1 overexpression as reported in multiple cancers modulates expression of a repertoire of its target genes causing an increase in proliferation, metastasis and survival of cancer cells. Six1 exists as a cell cycle regulated nuclear phosphoprotein and its cellular turnover is regulated by APC/C (Anaphase promoting complex / Cyclosome) complex mediated proteolysis. However, the kinases that regulate Six1 proteolysis have not been identified and the mechanistic details that cause its overproduction in various cancers are lacking. Here, we report that Six1 is a physiological GSK3β substrate. GSK3β interacts with Six1 and phosphorylates it at Ser221 within the conserved consensus sequence in its carboxy terminus. Using pharmacological inhibition, siRNA mediated knockdown and protein overexpression of GSK3β; we show that GSK3β regulates Six1 protein stability. Pulse chase analysis of Six1 revealed that GSK3β regulates its ubiquitin proteolysis such that Six1 phosphomimicking mutant (Six1S221E) for Ser221 site had dramatically increased half-life than its phosphodeficient (Six1S221A) and wild type variants. Furthermore, we demonstrate that GSK3β rescues Six1 from APC dependent proteolysis by regulating its binding with APC/C co-activator protein Cdh1. Importantly, strong positive correlation exists between GSK3β and Six1 protein levels throughout the cell cycle and in multiple cancers indicating that GSK3β activation may in part contribute to Six1 overproduction in a subset of human cancers.
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Affiliation(s)
- Asma Rafiq
- Department of Nanotechnology, School of Biological Sciences, University of Kashmir-, Srinagar 190006, India
| | - Sabreena Aashaq
- Department of Nanotechnology, School of Biological Sciences, University of Kashmir-, Srinagar 190006, India; Department of Immunology and Molecular Medicine, SKIMS, Srinagar 190011, India
| | - Iqra Jan
- Department of Nanotechnology, School of Biological Sciences, University of Kashmir-, Srinagar 190006, India
| | - Mahvish Ali
- Department of Nanotechnology, School of Biological Sciences, University of Kashmir-, Srinagar 190006, India
| | - Rabia Rakshan
- Department of Nanotechnology, School of Biological Sciences, University of Kashmir-, Srinagar 190006, India
| | - Asma Bashir
- Faculty of Biology, Fatima College of Health Sciences, Al-Raqaib 2, Ajman 3798, United Arab Emirates
| | - Ehtishamul Haq
- Department of Biotechnology, School of Biological Sciences, University of Kashmir-, Srinagar 190006, India
| | - Mushtaq A Beigh
- Department of Nanotechnology, School of Biological Sciences, University of Kashmir-, Srinagar 190006, India.
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5
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Zhu F, Crombie JL, Ni W, Hoang NM, Garg S, Hackett L, Chong SJF, Collins MC, Rui L, Griffin J, Davids MS. Hypomethylating agent decitabine sensitizes diffuse large B-cell lymphoma to venetoclax. Haematologica 2024; 109:186-199. [PMID: 37534528 PMCID: PMC10772509 DOI: 10.3324/haematol.2023.283245] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 07/25/2023] [Indexed: 08/04/2023] Open
Abstract
Despite recent advances in the therapy of diffuse large B-cell lymphoma (DLBCL), many patients are still not cured. Therefore, new therapeutic strategies are needed. The anti-apoptotic B-cell lymphoma 2 (BCL2) gene is commonly dysregulated in DLBCL due to various mechanisms such as chromosomal translocation t(14;18)(q32;q21) and copy number alterations; however, targeting BCL-2 with the selective inhibitor, venetoclax, led to response in only a minority of patients. Thus, we sought to identify a rational combination partner of venetoclax to improve its activity against DLBCL cells. Utilizing a functional assay, dynamic BH3 profiling, we found that the DNA hypomethylating agent decitabine increased mitochondrial apoptotic priming and BCL-2 dependence in DLBCL cells. RNA-sequencing analysis revealed that decitabine suppressed the pro-survival PI3K-AKT pathway and altered the mitochondria membrane composition in DLBCL cell lines. Additionally, it induced a DNA damage response and increased BAX and BAK activities. The combination of decitabine and venetoclax synergistically suppressed proliferation of DLBCL cells both in vitro and in vivo in a DLBCL cell line-derived xenograft mouse model. Our study suggests that decitabine plus venetoclax is a promising combination to explore clinically in DLBCL.
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Affiliation(s)
- Fen Zhu
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Jennifer L Crombie
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Wei Ni
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Nguyet-Minh Hoang
- Department of Medicine and Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Swati Garg
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Liam Hackett
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Stephen J F Chong
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Mary C Collins
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Lixin Rui
- Department of Medicine and Carbone Cancer Center, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - James Griffin
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Matthew S Davids
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA.
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6
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Centola CL, Dasso ME, Soria JD, Riera MF, Meroni SB, Galardo MN. Glycolysis as key regulatory step in FSH-induced rat Sertoli cell proliferation: Role of the mTORC1 pathway. Biochimie 2023; 214:145-156. [PMID: 37442535 DOI: 10.1016/j.biochi.2023.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/09/2023] [Accepted: 07/08/2023] [Indexed: 07/15/2023]
Abstract
The definitive number of Sertoli cells (SCs), achieved during the proliferative periods, defines the spermatogenic capacity in adulthood. It is recognized that FSH is the main mitogen targeting SC and that it exerts its action, at least partly, through the activation of the PI3K/Akt/mTORC1 pathway. mTORC1 controls a large number of cellular functions, including glycolysis and cell proliferation. Interestingly, recent evidence revealed that the glycolytic flux might modulate mTORC1 activity and, consequently, cell cycle progression. Although mature SC metabolism has been thoroughly studied, several aspects of metabolism regulation in proliferating SC are still to be elucidated. The objective of this study was to explore whether aerobic glycolysis is regulated by FSH through mTORC1 pathway in proliferating SC, and to assess the involvement of glycolysis in the regulation of SC proliferation. The present study was carried out utilizing 8-day-old rat SC cultures. The results obtained show that FSH enhances glycolytic flux through the induction of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3 (PFKFB3) and lactate dehydrogenase A (LDHA) in an mTORC1 dependent manner. In addition, PFKFB3 and LDH inhibitors prevent FSH from activating mTORC1 and stimulating SC proliferation and glycolysis, presumably through mTORC1 pathway inhibition. In summary, FSH simultaneously regulates SC proliferation and glycolysis in an mTORC1 dependent manner, and glycolysis seems to cooperate with FSH in the stimulation of both cellular functions through the modulation of the same signalling pathway. Therefore, a positive feedback between the mTORC1 pathway and glycolysis triggered by FSH is hypothesized.
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Affiliation(s)
- Cecilia Lucia Centola
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Marina Ercilia Dasso
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Julio Daniel Soria
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Maria Fernanda Riera
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Silvina Beatriz Meroni
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Maria Noel Galardo
- Centro de Investigaciones Endocrinológicas "Dr. César Bergadá" (CEDIE) CONICET - FEI - División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD, Ciudad Autónoma de Buenos Aires, Argentina.
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7
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Venit T, Sapkota O, Abdrabou WS, Loganathan P, Pasricha R, Mahmood SR, El Said NH, Sherif S, Thomas S, Abdelrazig S, Amin S, Bedognetti D, Idaghdour Y, Magzoub M, Percipalle P. Positive regulation of oxidative phosphorylation by nuclear myosin 1 protects cells from metabolic reprogramming and tumorigenesis in mice. Nat Commun 2023; 14:6328. [PMID: 37816864 PMCID: PMC10564744 DOI: 10.1038/s41467-023-42093-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/29/2023] [Indexed: 10/12/2023] Open
Abstract
Metabolic reprogramming is one of the hallmarks of tumorigenesis. Here, we show that nuclear myosin 1 (NM1) serves as a key regulator of cellular metabolism. NM1 directly affects mitochondrial oxidative phosphorylation (OXPHOS) by regulating mitochondrial transcription factors TFAM and PGC1α, and its deletion leads to underdeveloped mitochondria inner cristae and mitochondrial redistribution within the cell. These changes are associated with reduced OXPHOS gene expression, decreased mitochondrial DNA copy number, and deregulated mitochondrial dynamics, which lead to metabolic reprogramming of NM1 KO cells from OXPHOS to aerobic glycolysis.This, in turn, is associated with a metabolomic profile typical for cancer cells, namely increased amino acid-, fatty acid-, and sugar metabolism, and increased glucose uptake, lactate production, and intracellular acidity. NM1 KO cells form solid tumors in a mouse model, suggesting that the metabolic switch towards aerobic glycolysis provides a sufficient carcinogenic signal. We suggest that NM1 plays a role as a tumor suppressor and that NM1 depletion may contribute to the Warburg effect at the onset of tumorigenesis.
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Affiliation(s)
- Tomas Venit
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Oscar Sapkota
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Wael Said Abdrabou
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
- Center for Genomics and Systems Biology, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Palanikumar Loganathan
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Renu Pasricha
- Core Technology Platforms, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Syed Raza Mahmood
- Center for Genomics and Systems Biology, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Nadine Hosny El Said
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Shimaa Sherif
- Translational Medicine Department, Research Branch, Sidra Medicine, Doha, Qatar
| | - Sneha Thomas
- Core Technology Platforms, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Salah Abdelrazig
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Shady Amin
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Davide Bedognetti
- Translational Medicine Department, Research Branch, Sidra Medicine, Doha, Qatar
- Department of Internal Medicine and Medical Specialties (DiMI), University of Genoa, Genoa, Italy
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Youssef Idaghdour
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
- Center for Genomics and Systems Biology, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Mazin Magzoub
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates
| | - Piergiorgio Percipalle
- Program in Biology, Division of Science and Mathematics, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates.
- Center for Genomics and Systems Biology, New York University Abu Dhabi (NYUAD), P.O. Box, 129188, Abu Dhabi, United Arab Emirates.
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91, Stockholm, Sweden.
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8
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Dedert CJ, Bagdady KR, Fisher JS. Prior Treatment with AICAR Causes the Selective Phosphorylation of mTOR Substrates in C2C12 Cells. Curr Issues Mol Biol 2023; 45:8040-8052. [PMID: 37886951 PMCID: PMC10605383 DOI: 10.3390/cimb45100508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/05/2023] [Accepted: 09/27/2023] [Indexed: 10/28/2023] Open
Abstract
Metabolic stress in skeletal muscle cells causes sustained metabolic changes, but the mechanisms of the prolonged effects are not fully known. In this study, we tested C2C12 cells with the AMP-activated protein kinase (AMPK) stimulator AICAR and measured the changes in the metabolic pathways and signaling kinases. AICAR caused an acute increase in the phosphorylation of the AMPK target ULK1, the mTORC1 substrate S6K, and the mTORC2 target Akt. Intriguingly, prior exposure to AICAR only decreased glucose-6 phosphate dehydrogenase activity when it underwent three-hour recovery after exposure to AICAR in a bicarbonate buffer containing glucose (KHB) instead of Dulbecco's Minimum Essential Medium (DMEM). The phosphorylation of the mTORC1 target S6K was increased after recovery in DMEM but not KHB, although this appeared to be specific to S6K, as the phosphorylation of the mTORC1 target site on ULK1 was not altered when the cells recovered in DMEM. The phosphorylation of mTORC2 target sites was also heterogenous under these conditions, with Akt increasing at serine 473 while other targets (SGK1 and PKCα) were unaffected. The exposure of cells to rapamycin (an mTORC1 inhibitor) and PP242 (an inhibitor of both mTOR complexes) revealed the differential phosphorylation of mTORC2 substrates. Taken together, the data suggest that prior exposure to AICAR causes the selective phosphorylation of mTOR substrates, even after prolonged recovery in a nutrient-replete medium.
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9
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Dedert C, Salih L, Xu F. Progranulin Protects against Hyperglycemia-Induced Neuronal Dysfunction through GSK3β Signaling. Cells 2023; 12:1803. [PMID: 37443837 PMCID: PMC10340575 DOI: 10.3390/cells12131803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/20/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023] Open
Abstract
Type II diabetes affects over 530 million individuals worldwide and contributes to a host of neurological pathologies. Uncontrolled high blood glucose (hyperglycemia) is a major factor in diabetic pathology, and glucose regulation is a common goal for maintenance in patients. We have found that the neuronal growth factor progranulin protects against hyperglycemic stress in neurons, and although its mechanism of action is uncertain, our findings identified Glycogen Synthase Kinase 3β (GSK3β) as being potentially involved in its effects. In this study, we treated mouse primary cortical neurons exposed to high-glucose conditions with progranulin and a selective pharmacological inhibitor of GSK3β before assessing neuronal health and function. Whole-cell and mitochondrial viability were both improved by progranulin under high-glucose stress in a GSK3β-dependent manner. This extended to autophagy flux, indicated by the expressions of autophagosome marker Light Chain 3B (LC3B) and lysosome marker Lysosome-Associated Membrane Protein 2A (LAMP2A), which were affected by progranulin and showed heterogeneous changes from GSK3β inhibition. Lastly, GSK3β inhibition attenuated downstream calcium signaling and neuronal firing effects due to acute progranulin treatment. These data indicate that GSK3β plays an important role in progranulin's neuroprotective effects under hyperglycemic stress and serves as a jumping-off point to explore progranulin's protective capabilities in other neurodegenerative models.
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Affiliation(s)
- Cass Dedert
- Department of Biology, College of Arts and Sciences, Saint Louis University, Saint Louis, MO 63103, USA; (C.D.); (L.S.)
- Institute for Translational Neuroscience, Saint Louis University, Saint Louis, MO 63103, USA
| | - Lyuba Salih
- Department of Biology, College of Arts and Sciences, Saint Louis University, Saint Louis, MO 63103, USA; (C.D.); (L.S.)
- Institute for Translational Neuroscience, Saint Louis University, Saint Louis, MO 63103, USA
| | - Fenglian Xu
- Department of Biology, College of Arts and Sciences, Saint Louis University, Saint Louis, MO 63103, USA; (C.D.); (L.S.)
- Institute for Translational Neuroscience, Saint Louis University, Saint Louis, MO 63103, USA
- Department of Pharmacology and Physiology, School of Medicine, Saint Louis University, Saint Louis, MO 63103, USA
- Department of Biomedical Engineering, School of Science and Engineering, Saint Louis University, Saint Louis, MO 63103, USA
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10
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Wei PL, Prince GMSH, Batzorig U, Huang CY, Chang YJ. ALDH2 promotes cancer stemness and metastasis in colorectal cancer through activating β-catenin signaling. J Cell Biochem 2023. [PMID: 37183314 DOI: 10.1002/jcb.30418] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/29/2023] [Accepted: 04/21/2023] [Indexed: 05/16/2023]
Abstract
Colorectal cancer (CRC) is the primary cause of death from gastrointestinal cancers. Aldehyde dehydrogenase 2 (ALDH2), a crucial mitochondrial enzyme for the oxidative pathway of alcohol metabolism, plays a dual role in cancer progression. In some cancers, it is tumor suppressive; in others, it drives cancer progression. However, whether targeting ALDH2 has any therapeutic implications or prognostic value in CRC is still unclear. Here, we investigated the role of ALDH2 in CRC progression by targeting its enzymatic activity rather than gene expression. We found that inhibiting ALDH2 by CVT-10216 and daidzein significantly decrease migration and stemness properties of both DLD-1 and HCT 116 cells, whereas activating ALDH2 by Alda-1 enhances migration rate. Concomitantly, ALDH2 inhibition by both CVT-10216 and daidzein downregulates the mRNA levels of fibronectin, snail, twist, MMP7, CD44, c-Myc, SOX2, and OCT-4, which are oncogenic in the advanced stage of CRC. Furthermore, Gene Set Enrichment Analysis (GSEA) on ALDH2 co-expressed genes from The Cancer Genome Atlas (TCGA) revealed that MYC target gene sets are upregulated. We found that ALDH2 inhibition decreased the nuclear protein levels of pGSK3β serine 9 and c-Myc. This suggests that ALDH2 probably targets β-catenin signaling in CRC cells. Together, our results demonstrate the prognostic value of ALDH2 in CRC as it regulates both CRC stemness and migration. Our findings also propose that the plant-derived isoflavone daidzein could be a potential chemotherapeutic drug targeting ALDH2 in CRC.
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Affiliation(s)
- Po-Li Wei
- Division of Colorectal Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
- Department of Surgery, College of Medicine, School of Medicine, Taipei Medical University, Taipei, Taiwan
- Cancer Research Center and Translational Laboratory, Department of Medical Research, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Cancer Biology and Drug Discovery, Taipei Medical University, Taipei, Taiwan
| | - G M Shazzad Hossain Prince
- Graduate Institute of Clinical Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Uyanga Batzorig
- Department of Dermatology, University of California, San Diego, La Jolla, California, USA
| | - Chien-Yu Huang
- School of Medicine, National Tsing Hua University, Hsinchu, Taiwan
- Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan
- Department of Pathology, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Yu-Jia Chang
- Cancer Research Center and Translational Laboratory, Department of Medical Research, Taipei Medical University Hospital, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Clinical Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Pathology, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
- Cell Physiology and Molecular Image Research Center, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
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11
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Zhang H, Zhang K, Qiu L, Yue J, Jiang H, Deng Q, Zhou R, Yin Z, Ma S, Ke Y. Cancer-associated fibroblasts facilitate DNA damage repair by promoting the glycolysis in non-small cell lung cancer. Biochim Biophys Acta Mol Basis Dis 2023; 1869:166670. [PMID: 36822449 DOI: 10.1016/j.bbadis.2023.166670] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/28/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023]
Abstract
Radiotherapy is an essential treatment modality for the management of non-small cell lung cancer (NSCLC) patients. Tumor radioresistance is the major factor limiting the efficacy of radiotherapy in NSCLC patients. Our study aimed to reveal whether cancer-associated fibroblasts (CAFs), one main component of the tumor microenvironment, regulated DNA damage response of NSCLC cells following irradiation and clarify the involved mechanisms. We found CAFs inhibited irradiation-induced DNA damage while promoted DNA repair of NSCLC cells and caused cell cycle arrest in the radioresistant S phase. CAFs have the ability of up-regulating and stabilizing c-Myc, leading to the transcription activation of HK2 kinase, a key rate-limiting enzyme in glycolysis by activating Wnt/β-catenin pathway. Attenuation of glycolysis significantly reversed the effect of CAFs on DNA damage response of NSCLC cells. By high-throughput screening of human cytokines/chemokines array, we found CAFs-secreted midkine led to the promotion of glycolysis by activating Wnt/β-catenin pathway in NSCLC cells. In vivo, CAFs caused the radioresistance of NSCLC cells also by promoting the glycolysis in a β-catenin signaling-dependent manner. These findings may provide novel strategies for reversing the radioresistance of NSCLC cells.
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Affiliation(s)
- Hongfang Zhang
- Hangzhou Cancer Institution, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou 310002, China; Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Ke Zhang
- Department of Radiation Oncology, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou 310002, China
| | - Liqing Qiu
- Hangzhou Cancer Institution, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou 310002, China
| | - Jing Yue
- Hangzhou Cancer Institution, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou 310002, China
| | - Hong Jiang
- Department of Cardiothoracic Surgery, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Qinghua Deng
- Department of Radiation Oncology, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou 310002, China
| | - Rongjing Zhou
- Department of Pathology, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou 310002, China
| | - Zihao Yin
- Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Shenglin Ma
- Hangzhou Cancer Institution, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou 310002, China; Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China; Zhejiang University Cancer Center, Hangzhou 310058, China.
| | - Yuehai Ke
- Department of Pathology and Pathophysiology and Department of Respiratory Medicine at Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China.
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12
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Wada R, Fujinuma S, Nakatsumi H, Matsumoto M, Nakayama KI. Phosphorylation of PBX2, a novel downstream target of mTORC1, is determined by GSK3 and PP1. J Biochem 2023; 173:129-138. [PMID: 36477205 DOI: 10.1093/jb/mvac094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/01/2022] [Accepted: 11/03/2022] [Indexed: 12/12/2022] Open
Abstract
Mechanistic target of rapamycin complex 1 (mTORC1) is a serine-threonine kinase that is activated by extracellular signals, such as nutrients and growth factors. It plays a key role in the control of various biological processes, such as protein synthesis and energy metabolism by mediating or regulating the phosphorylation of multiple target molecules, some of which remain to be identified. We have here reanalysed a large-scale phosphoproteomics data set for mTORC1 target molecules and identified pre-B cell leukemia transcription factor 2 (PBX2) as such a novel target that is dephosphorylated downstream of mTORC1. We confirmed that PBX2, but not other members of the PBX family, is dephosphorylated in an mTORC1 activity-dependent manner. Furthermore, pharmacological and gene knockdown experiments revealed that glycogen synthase kinase 3 (GSK3) and protein phosphatase 1 (PP1) are responsible for the phosphorylation and dephosphorylation of PBX2, respectively. Our results thus suggest that the balance between the antagonistic actions of GSK3 and PP1 determines the phosphorylation status of PBX2 and its regulation by mTORC1.
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Key Words
- glycogen synthase kinase 3 (GSK3)
Abbreviations: DAPI, 4′,6-diamidino-2-phenylindole; DMSO, dimethyl sulfoxide; ERK, extracellular signal–regulated kinase; FOXK1, forkhead box K1;
GSK3, glycogen synthase kinase 3; HA, hemagglutinin; LARP1, La-related protein 1; MEK, ERK kinase; mTORC1, mechanistic target of rapamycin complex 1; PBS, phosphate-buffered saline; PBX2, pre–B cell leukemia transcription factor 2; PI3K, phosphoinositide 3-kinase; PDK1, phosphoinositide-dependent protein kinase 1; PP1, protein phosphatase 1;
PP2A, protein phosphatase 2A; RAG, RAS-related GTP-binding protein; RHEB, Ras homolog enriched in Brain; shRNA, short hairpin RNA; siRNA, small interfering RNA; TBC1D7, TBC1 (TRE2-BUB2-CDC16) domain family member 7; TSC2, tuberous sclerosis complex 2; WT, wild-type
- mechanistic target of rapamycin complex 1 (mTORC1)
- phosphorylation
- pre–B cell leukemia transcription factor 2 (PBX2)
- protein phosphatase 1 (PP1)
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Affiliation(s)
- Reona Wada
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan
| | - Shun Fujinuma
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan
| | - Hirokazu Nakatsumi
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan
| | - Masaki Matsumoto
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan.,Department of Omics and Systems Biology, Graduate School of Medical and Dental Sciences, Niigata University, 757 Ichibancho, Asahimachi-dori, Chuo-ku, Niigata City, Niigata 951-8510, Japan
| | - Keiichi I Nakayama
- Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan
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13
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Pirzada RH, Ahmad B, Qayyum N, Choi S. Modeling structure-activity relationships with machine learning to identify GSK3-targeted small molecules as potential COVID-19 therapeutics. Front Endocrinol (Lausanne) 2023; 14:1084327. [PMID: 36950681 PMCID: PMC10025526 DOI: 10.3389/fendo.2023.1084327] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 02/20/2023] [Indexed: 03/08/2023] Open
Abstract
Coronaviruses induce severe upper respiratory tract infections, which can spread to the lungs. The nucleocapsid protein (N protein) plays an important role in genome replication, transcription, and virion assembly in SARS-CoV-2, the virus causing COVID-19, and in other coronaviruses. Glycogen synthase kinase 3 (GSK3) activation phosphorylates the viral N protein. To combat COVID-19 and future coronavirus outbreaks, interference with the dependence of N protein on GSK3 may be a viable strategy. Toward this end, this study aimed to construct robust machine learning models to identify GSK3 inhibitors from Food and Drug Administration-approved and investigational drug libraries using the quantitative structure-activity relationship approach. A non-redundant dataset consisting of 495 and 3070 compounds for GSK3α and GSK3β, respectively, was acquired from the ChEMBL database. Twelve sets of molecular descriptors were used to define these inhibitors, and machine learning algorithms were selected using the LazyPredict package. Histogram-based gradient boosting and light gradient boosting machine algorithms were used to develop predictive models that were evaluated based on the root mean square error and R-squared value. Finally, the top two drugs (selinexor and ruboxistaurin) were selected for molecular dynamics simulation based on the highest predicted activity (negative log of the half-maximal inhibitory concentration, pIC50 value) to further investigate the structural stability of the protein-ligand complexes. This artificial intelligence-based virtual high-throughput screening approach is an effective strategy for accelerating drug discovery and finding novel pharmacological targets while reducing the cost and time.
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Affiliation(s)
- Rameez Hassan Pirzada
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
- S&K Therapeutics, Ajou University Campus Plaza, Suwon, Republic of Korea
| | - Bilal Ahmad
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Naila Qayyum
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Sangdun Choi
- Department of Molecular Science and Technology, Ajou University, Suwon, Republic of Korea
- S&K Therapeutics, Ajou University Campus Plaza, Suwon, Republic of Korea
- *Correspondence: Sangdun Choi,
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14
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Orofiamma LA, Vural D, Antonescu CN. Control of cell metabolism by the epidermal growth factor receptor. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119359. [PMID: 36089077 DOI: 10.1016/j.bbamcr.2022.119359] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 08/24/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
The epidermal growth factor receptor (EGFR) triggers the activation of many intracellular signals that control cell proliferation, growth, survival, migration, and differentiation. Given its wide expression, EGFR has many functions in development and tissue homeostasis. Some of the cellular outcomes of EGFR signaling involve alterations of specific aspects of cellular metabolism, and alterations of cell metabolism are emerging as driving influences in many physiological and pathophysiological contexts. Here we review the mechanisms by which EGFR regulates cell metabolism, including by modulation of gene expression and protein function leading to control of glucose uptake, glycolysis, biosynthetic pathways branching from glucose metabolism, amino acid metabolism, lipogenesis, and mitochondrial function. We further examine how this regulation of cell metabolism by EGFR may contribute to cell proliferation and differentiation and how EGFR-driven control of metabolism can impact certain diseases and therapy outcomes.
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Affiliation(s)
- Laura A Orofiamma
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada; Graduate Program in Molecular Science, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada
| | - Dafne Vural
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada; Graduate Program in Molecular Science, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada
| | - Costin N Antonescu
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada; Graduate Program in Molecular Science, Toronto Metropolitan University, Toronto, Ontario M5B 2K3, Canada.
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15
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STIL Promotes Tumorigenesis of Bladder Cancer by Activating PI3K/AKT/mTOR Signaling Pathway and Targeting C-Myc. Cancers (Basel) 2022; 14:cancers14235777. [PMID: 36497260 PMCID: PMC9739707 DOI: 10.3390/cancers14235777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/19/2022] [Accepted: 11/20/2022] [Indexed: 11/25/2022] Open
Abstract
SCL/TAL1 interrupting locus (STIL) regulates centriole replication and causes chromosome instability, which is closely related to malignant tumors. The purpose of our study was to investigate the role of STIL in bladder cancer (BC) tumorigenesis for the first time. The public database indicated that STIL is highly expressed and correlated with the cell cycle in BC. Immunohistochemistry staining showed that STIL expression is significantly elevated in BC tissues compared with paracancer tissues. CRISPR-Cas9 gene editing technology was used to induce BC cells to express STIL-specific sgRNA, revealing a significantly delayed growth rate in STIL knockout BC cells. Moreover, cell cycle arrest in the G0/G1 phase was triggered by decreasing STIL, which led to delayed BC cell growth in vitro and in vivo. Mechanically, STIL knockout inhibited the PI3K/AKT/mTOR pathway and down-regulated the expression of c-myc. Furthermore, SC79 (AKT activating agent) partially reversed the inhibitory effects of STIL knockout on the proliferation and migration of BC cells. In conclusion, STIL enhanced the PI3K/AKT/mTOR pathway, resulting in increased expression of c-myc, ultimately promoting BC occurrence and progression. These results indicate that STIL might be a potential target for BC patients.
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16
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Chatterjee D, Beaulieu JM. Inhibition of glycogen synthase kinase 3 by lithium, a mechanism in search of specificity. Front Mol Neurosci 2022; 15:1028963. [PMID: 36504683 PMCID: PMC9731798 DOI: 10.3389/fnmol.2022.1028963] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 10/24/2022] [Indexed: 11/25/2022] Open
Abstract
Inhibition of Glycogen synthase kinase 3 (GSK3) is a popular explanation for the effects of lithium ions on mood regulation in bipolar disorder and other mental illnesses, including major depression, cyclothymia, and schizophrenia. Contribution of GSK3 is supported by evidence obtained from animal and patient derived model systems. However, the two GSK3 enzymes, GSK3α and GSK3β, have more than 100 validated substrates. They are thus central hubs for major biological functions, such as dopamine-glutamate neurotransmission, synaptic plasticity (Hebbian and homeostatic), inflammation, circadian regulation, protein synthesis, metabolism, inflammation, and mitochondrial functions. The intricate contributions of GSK3 to several biological processes make it difficult to identify specific mechanisms of mood stabilization for therapeutic development. Identification of GSK3 substrates involved in lithium therapeutic action is thus critical. We provide an overview of GSK3 biological functions and substrates for which there is evidence for a contribution to lithium effects. A particular focus is given to four of these: the transcription factor cAMP response element-binding protein (CREB), the RNA-binding protein FXR1, kinesin subunits, and the cytoskeletal regulator CRMP2. An overview of how co-regulation of these substrates may result in shared outcomes is also presented. Better understanding of how inhibition of GSK3 contributes to the therapeutic effects of lithium should allow for identification of more specific targets for future drug development. It may also provide a framework for the understanding of how lithium effects overlap with those of other drugs such as ketamine and antipsychotics, which also inhibit brain GSK3.
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Affiliation(s)
| | - Jean Martin Beaulieu
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
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17
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Donati G, Amati B. MYC and therapy resistance in cancer: risks and opportunities. Mol Oncol 2022; 16:3828-3854. [PMID: 36214609 PMCID: PMC9627787 DOI: 10.1002/1878-0261.13319] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/08/2022] [Accepted: 10/06/2022] [Indexed: 12/24/2022] Open
Abstract
The MYC transcription factor, encoded by the c-MYC proto-oncogene, is activated by growth-promoting signals, and is a key regulator of biosynthetic and metabolic pathways driving cell growth and proliferation. These same processes are deregulated in MYC-driven tumors, where they become critical for cancer cell proliferation and survival. As other oncogenic insults, overexpressed MYC induces a series of cellular stresses (metabolic, oxidative, replicative, etc.) collectively known as oncogenic stress, which impact not only on tumor progression, but also on the response to therapy, with profound, multifaceted consequences on clinical outcome. On one hand, recent evidence uncovered a widespread role for MYC in therapy resistance in multiple cancer types, with either standard chemotherapeutic or targeted regimens. Reciprocally, oncogenic MYC imparts a series of molecular and metabolic dependencies to cells, thus giving rise to cancer-specific vulnerabilities that may be exploited to obtain synthetic-lethal interactions with novel anticancer drugs. Here we will review the current knowledge on the links between MYC and therapeutic responses, and will discuss possible strategies to overcome resistance through new, targeted interventions.
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Affiliation(s)
- Giulio Donati
- European Institute of Oncology (IEO) – IRCCSMilanItaly
| | - Bruno Amati
- European Institute of Oncology (IEO) – IRCCSMilanItaly
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18
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Arif T. Lysosomes and Their Role in Regulating the Metabolism of Hematopoietic Stem Cells. BIOLOGY 2022; 11:1410. [PMID: 36290314 PMCID: PMC9598322 DOI: 10.3390/biology11101410] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/22/2022] [Accepted: 09/23/2022] [Indexed: 11/26/2022]
Abstract
Hematopoietic stem cells (HSCs) have the capacity to renew blood cells at all stages of life and are largely quiescent at a steady state. It is essential to understand the processes that govern quiescence in HSCs to enhance bone marrow transplantation. It is hypothesized that in their quiescent state, HSCs primarily use glycolysis for energy production rather than mitochondrial oxidative phosphorylation (OXPHOS). In addition, the HSC switch from quiescence to activation occurs along a continuous developmental path that is driven by metabolism. Specifying the metabolic regulation pathway of HSC quiescence will provide insights into HSC homeostasis for therapeutic application. Therefore, understanding the metabolic demands of HSCs at a steady state is key to developing innovative hematological therapeutics. Lysosomes are the major degradative organelle in eukaryotic cells. Catabolic, anabolic, and lysosomal function abnormalities are connected to an expanding list of diseases. In recent years, lysosomes have emerged as control centers of cellular metabolism, particularly in HSC quiescence, and essential regulators of cell signaling have been found on the lysosomal membrane. In addition to autophagic processes, lysosomal activities have been shown to be crucial in sustaining quiescence by restricting HSCs access to a nutritional reserve essential for their activation into the cell cycle. Lysosomal activity may preserve HSC quiescence by altering glycolysis-mitochondrial biogenesis. The understanding of HSC metabolism has significantly expanded over the decade, revealing previously unknown requirements of HSCs in both their dividing (active) and quiescent states. Therefore, understanding the role of lysosomes in HSCs will allow for the development of innovative treatment methods based on HSCs to fight clonal hematopoiesis and HSC aging.
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Affiliation(s)
- Tasleem Arif
- Department of Cell, Developmental & Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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19
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Liu Y, Li X, Wu X, Luo X, Yan B, Mo C, Guo H, Yang S, Wang Y, Lai Y, Puno P, Li L. Sis-25, a meroditerpenoid derivative with a cyclobutane scaffold, inhibits activated T cell proliferation by targeting GSK3β in vitro and in vivo. Eur J Pharmacol 2022; 929:175151. [PMID: 35841942 DOI: 10.1016/j.ejphar.2022.175151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 07/03/2022] [Accepted: 07/07/2022] [Indexed: 11/03/2022]
Abstract
A series of novel scopariusicide derivatives were designed and synthesized starting from the main diterpenoid from the aerial parts of Isodon scoparius. Sis-25 was the most effective compound among them. The potential mechanism(s) of its immunosuppressive activity in vitro, as well as its effects on delayed type hypersensitivity (DTH) reaction and imiquimod-induced dermatitis in vivo were investigated in this study. Sis-25 inhibited anti-CD3/anti-CD28 mAbs, PHA or alloantigen-induced T cell proliferation without obvious cytotoxicity. Sis-25 was a highly selective inhibitor of GSK3-β and inhibited the mTOR/p70S6K pathway but not the PI3K/Akt, p38 MAPK/ERK 1/2 and JAK3/STAT5 pathways. Furthermore, Sis-25 significantly inhibited IFN-γ, IL-6 and IL-17 expression but not IL-10 expression in activated T cells. Finally, Sis-25 treatment mitigated the DNFB-induced DTH reaction and ameliorated imiquimod-induced dermatitis. In summary, Sis-25 exerted significant immunosuppressive activity by targeting GSK3β in vitro and in vivo. Sis-25 may guide the design of new drugs for more effective and safer treatments of autoimmune diseases and provide new insight into developing utilizations of Isodon scoparius.
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Affiliation(s)
- Yang Liu
- Department of Gastroenterology, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610500, Sichuan, PR China; Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Xingren Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, PR China
| | - Xiuyin Wu
- Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Xingyan Luo
- Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Bingchao Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, PR China
| | - Chunfen Mo
- Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Huijie Guo
- Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Shuxia Yang
- Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Yantang Wang
- Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Yi Lai
- Research Center, Chengdu Medical College, Chengdu, 610500, Sichuan, PR China
| | - Pematenzin Puno
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, PR China.
| | - Limei Li
- College of Pharmacy, Southwest Minzu University, Chengdu, 610225, Sichuan, PR China.
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20
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Benhammou JN, Sinnett-Smith J, Pisegna JR, Rozengurt EJ. Interplay Between Fatty Acids, Stearoyl-Co-A Desaturase, Mechanistic Target of Rapamycin, and Yes-Associated Protein/Transcriptional Coactivator With PDZ-Binding Motif in Promoting Hepatocellular Carcinoma. GASTRO HEP ADVANCES 2022; 2:232-241. [PMID: 39132609 PMCID: PMC11308718 DOI: 10.1016/j.gastha.2022.07.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/17/2022] [Indexed: 08/13/2024]
Abstract
Nonalcoholic fatty liver disease has reached pandemic proportions with one of its most consequential complications being hepatocellular carcinoma (HCC). Nonalcoholic fatty liver disease-related HCC is becoming the leading indication for liver transplantation in the United States. Given the scarcity of available organs, early detection and prevention remain key in prevention and management of the disease. Over the years, the yes-associated protein (YAP)/transcriptional coactivator with PDZ-binding motif (TAZ) pathway emerged as a key signal transduction pathway in the pathogenesis of HCC. In this review, we explore the interplay between the YAP/TAZ pathway as a point of convergence in HCC pathogenesis. We review the evidence of how lipid reprogramming and key lipid pathways, saturated and monounsaturated fatty acids (through the rate-limiting enzyme stearoyl Co-A desaturase), the mevalonic acid pathway (the role of statins), and mechanistic target of rapamycin all play critical roles in intricate and complex networks that tightly regulate the YAP/TAZ pro-oncogenic pathway.
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Affiliation(s)
- Jihane N. Benhammou
- Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, California
- Division of Gastroenterology, Hepatology and Parenteral Nutrition, Greater Los Angeles Veterans Affairs Healthcare System, Los Angeles, California
| | - Jim Sinnett-Smith
- Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, California
| | - Joseph R. Pisegna
- Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, California
- Division of Gastroenterology, Hepatology and Parenteral Nutrition, Greater Los Angeles Veterans Affairs Healthcare System, Los Angeles, California
| | - Enrique J. Rozengurt
- Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at the University of California, Los Angeles, California
- Division of Gastroenterology, Hepatology and Parenteral Nutrition, Greater Los Angeles Veterans Affairs Healthcare System, Los Angeles, California
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21
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He L, Endress J, Cho S, Li Z, Zheng Y, Asara JM, Blenis J. Suppression of nuclear GSK3 signaling promotes serine/one-carbon metabolism and confers metabolic vulnerability in lung cancer cells. SCIENCE ADVANCES 2022; 8:eabm8786. [PMID: 35594343 PMCID: PMC9122323 DOI: 10.1126/sciadv.abm8786] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 04/05/2022] [Indexed: 05/02/2023]
Abstract
Serine/one-carbon metabolism provides critical resources for nucleotide biosynthesis and epigenetic maintenance and is thus necessary in cancer cell growth, although the detailed regulatory mechanisms remain unclear. We uncover a critical role of glycogen synthase kinase 3 (GSK3) in regulating the expression of serine/one-carbon metabolic enzymes. Nuclear enrichment of GSK3 significantly suppresses genes that mediate de novo serine synthesis, including PHGDH, PSAT1, PSPH, and one-carbon metabolism, including SHMT2 and MTHFD2. FRAT1 promotes nuclear exclusion of GSK3, enhances serine/one-carbon metabolism, and, as a result, confers cell vulnerability to inhibitors that target this metabolic process such as SHIN1, a specific SHMT1/2 inhibitor. Furthermore, pharmacological or genetic suppression of GSK3 promotes serine/one-carbon metabolism and exhibits a significant synergistic effect in combination with SHIN1 in suppressing cancer cell proliferation in cultured cells and in vivo. Our observations indicate that inhibition of nuclear GSK3 signaling creates a vulnerability, which results in enhanced efficacy of serine/one-carbon metabolism inhibitors for the treatment of cancer.
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Affiliation(s)
- Long He
- Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
| | - Jennifer Endress
- Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
- Weill Cornell Graduate School of Medical Sciences, Cornell University, New York, NY, USA
| | - Sungyun Cho
- Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
| | - Zhongchi Li
- Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
| | - Yuxiang Zheng
- Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
| | - John M. Asara
- Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - John Blenis
- Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, USA
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22
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Cabral-Dias R, Lucarelli S, Zak K, Rahmani S, Judge G, Abousawan J, DiGiovanni LF, Vural D, Anderson KE, Sugiyama MG, Genc G, Hong W, Botelho RJ, Fairn GD, Kim PK, Antonescu CN. Fyn and TOM1L1 are recruited to clathrin-coated pits and regulate Akt signaling. J Cell Biol 2022; 221:213045. [PMID: 35238864 PMCID: PMC8899389 DOI: 10.1083/jcb.201808181] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 12/15/2021] [Accepted: 01/24/2022] [Indexed: 12/24/2022] Open
Abstract
The epidermal growth factor (EGF) receptor (EGFR) controls many aspects of cell physiology. EGF binding to EGFR elicits the membrane recruitment and activation of phosphatidylinositol-3-kinase, leading to Akt phosphorylation and activation. Concomitantly, EGFR is recruited to clathrin-coated pits (CCPs), eventually leading to receptor endocytosis. Previous work uncovered that clathrin, but not receptor endocytosis, is required for EGF-stimulated Akt activation, and that some EGFR signals are enriched in CCPs. Here, we examine how CCPs control EGFR signaling. The signaling adaptor TOM1L1 and the Src-family kinase Fyn are enriched within a subset of CCPs with unique lifetimes and protein composition. Perturbation of TOM1L1 or Fyn impairs EGF-stimulated phosphorylation of Akt2 but not Akt1. EGF stimulation also triggered the TOM1L1- and Fyn-dependent recruitment of the phosphoinositide 5-phosphatase SHIP2 to CCPs. Thus, the recruitment of TOM1L1 and Fyn to a subset of CCPs underlies a role for these structures in the support of EGFR signaling leading to Akt activation.
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Affiliation(s)
- Rebecca Cabral-Dias
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - Stefanie Lucarelli
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - Karolina Zak
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - Sadia Rahmani
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - Gurjeet Judge
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - John Abousawan
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - Laura F DiGiovanni
- Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.,Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Dafne Vural
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - Karen E Anderson
- Signalling Programme, Babraham Institute, Babraham Research Campus, Cambridge, UK
| | - Michael G Sugiyama
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Gizem Genc
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Wanjin Hong
- Institute of Molecular and Cell Biology, A*STAR, Singapore
| | - Roberto J Botelho
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada
| | - Gregory D Fairn
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Peter K Kim
- Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.,Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Costin N Antonescu
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada.,Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, Canada.,Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, Ontario, Canada
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23
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Pan HY, Valapala M. Regulation of Autophagy by the Glycogen Synthase Kinase-3 (GSK-3) Signaling Pathway. Int J Mol Sci 2022; 23:1709. [PMID: 35163631 PMCID: PMC8836041 DOI: 10.3390/ijms23031709] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/25/2022] [Accepted: 01/26/2022] [Indexed: 12/14/2022] Open
Abstract
Autophagy is a vital cellular mechanism that benefits cellular maintenance and survival during cell stress. It can eliminate damaged or long-lived organelles and improperly folded proteins to maintain cellular homeostasis, development, and differentiation. Impaired autophagy is associated with several diseases such as cancer, neurodegenerative diseases, and age-related macular degeneration (AMD). Several signaling pathways are associated with the regulation of the autophagy pathway. The glycogen synthase kinase-3 signaling pathway was reported to regulate the autophagy pathway. In this review, we will discuss the mechanisms by which the GSK-3 signaling pathway regulates autophagy. Autophagy and lysosomal function are regulated by transcription factor EB (TFEB). GSK-3 was shown to be involved in the regulation of TFEB nuclear expression in an mTORC1-dependent manner. In addition to mTORC1, GSK-3β also regulates TFEB via the protein kinase C (PKC) and the eukaryotic translation initiation factor 4A-3 (eIF4A3) signaling pathways. In addition to TFEB, we will also discuss the mechanisms by which the GSK-3 signaling pathway regulates autophagy by modulating other signaling molecules and autophagy inducers including, mTORC1, AKT and ULK1. In summary, this review provides a comprehensive understanding of the role of the GSK-3 signaling pathway in the regulation of autophagy.
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Affiliation(s)
| | - Mallika Valapala
- School of Optometry, Indiana University, Bloomington, IN 47405, USA;
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24
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Fazil MHUT, Prasannan P, Wong BHS, Kottaiswamy A, Salim NSBM, Sze SK, Verma NK. GSK3β Interacts With CRMP2 and Notch1 and Controls T-Cell Motility. Front Immunol 2021; 12:680071. [PMID: 34975828 PMCID: PMC8718691 DOI: 10.3389/fimmu.2021.680071] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 11/30/2021] [Indexed: 11/22/2022] Open
Abstract
The trafficking of T-cells through peripheral tissues and into afferent lymphatic vessels is essential for immune surveillance and an adaptive immune response. Glycogen synthase kinase 3β (GSK3β) is a serine/threonine kinase and regulates numerous cell/tissue-specific functions, including cell survival, metabolism, and differentiation. Here, we report a crucial involvement of GSK3β in T-cell motility. Inhibition of GSK3β by CHIR-99021 or siRNA-mediated knockdown augmented the migratory behavior of human T-lymphocytes stimulated via an engagement of the T-cell integrin LFA-1 with its ligand ICAM-1. Proteomics and protein network analysis revealed ongoing interactions among GSK3β, the surface receptor Notch1 and the cytoskeletal regulator CRMP2. LFA-1 stimulation in T-cells reduced Notch1-dependent GSK3β activity by inducing phosphorylation at Ser9 and its nuclear translocation accompanied by the cleaved Notch1 intracellular domain and decreased GSK3β-CRMP2 association. LFA-1-induced or pharmacologic inhibition of GSK3β in T-cells diminished CRMP2 phosphorylation at Thr514. Although substantial amounts of CRMP2 were localized to the microtubule-organizing center in resting T-cells, this colocalization of CRMP2 was lost following LFA-1 stimulation. Moreover, the migratory advantage conferred by GSK3β inhibition in T-cells by CHIR-99021 was lost when CRMP2 expression was knocked-down by siRNA-induced gene silencing. We therefore conclude that GSK3β controls T-cell motility through interactions with CRMP2 and Notch1, which has important implications in adaptive immunity, T-cell mediated diseases and LFA-1-targeted therapies.
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Affiliation(s)
| | - Praseetha Prasannan
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
| | - Brandon Han Siang Wong
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
- Interdisciplinary Graduate Programme, NTU Institute for Health Technologies (HealthTech NTU), Nanyang Technological University Singapore, Singapore, Singapore
| | - Amuthavalli Kottaiswamy
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
| | | | - Siu Kwan Sze
- School of Biological Sciences, Nanyang Technological University Singapore, Singapore, Singapore
| | - Navin Kumar Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
- *Correspondence: Navin Kumar Verma,
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25
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Abstract
Lysosomes are the main degradative organelles of almost all eukaryotic cells. They fulfil a crucial function in cellular homeostasis, and impairments in lysosomal function are connected to a continuously increasing number of pathological conditions. In recent years, lysosomes are furthermore emerging as control centers of cellular metabolism, and major regulators of cellular signaling were shown to be activated at the lysosomal surface. To date, >300 proteins were demonstrated to be located in/at the lysosome, and the lysosomal proteome and interactome is constantly growing. For the identification of these proteins, and their involvement in cellular mechanisms or disease progression, mass spectrometry (MS)-based proteomics has proven its worth in a large number of studies. In this review, we are recapitulating the application of MS-based approaches for the investigation of the lysosomal proteome, and their application to a diverse set of research questions. Numerous strategies were applied for the enrichment of lysosomes or lysosomal proteins and their identification by MS-based methods. This allowed for the characterization of the lysosomal proteome, the investigation of lysosome-related disorders, the utilization of lysosomal proteins as biomarkers for diseases, and the characterization of lysosome-related cellular mechanisms. While these >60 studies provide a comprehensive picture of the lysosomal proteome across several model organisms and pathological conditions, various proteomics approaches have not been applied to lysosomes yet, and a large number of questions are still left unanswered.
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Affiliation(s)
- Pathma Muthukottiappan
- Institute for Biochemistry and Molecular Biology, Medical Faculty, Rheinische Friedrich-Wilhelms-University of Bonn, Nussallee 11, 53115 Bonn, Germany.
| | - Dominic Winter
- Institute for Biochemistry and Molecular Biology, Medical Faculty, Rheinische Friedrich-Wilhelms-University of Bonn, Nussallee 11, 53115 Bonn, Germany.
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26
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Allosteric Modulation of GSK-3β as a New Therapeutic Approach in Limb Girdle Muscular Dystrophy R1 Calpain 3-Related. Int J Mol Sci 2021; 22:ijms22147367. [PMID: 34298987 PMCID: PMC8308041 DOI: 10.3390/ijms22147367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/28/2021] [Accepted: 07/06/2021] [Indexed: 12/28/2022] Open
Abstract
Limb-girdle muscular dystrophy R1 calpain 3-related (LGMDR1) is an autosomal recessive muscular dystrophy produced by mutations in the CAPN3 gene. It is a rare disease and there is no cure or treatment for the disease while the pathophysiological mechanism by which the absence of calpain 3 provokes the dystrophy in muscles is not clear. However, key proteins implicated in Wnt and mTOR signaling pathways, which regulate muscle homeostasis, showed a considerable reduction in their expression and in their phosphorylation in LGMDR1 patients' muscles. Finally, the administration of tideglusib and VP0.7, ATP non-competitive inhibitors of glycogen synthase kinase 3β (GSK-3β), restore the expression and phosphorylation of these proteins in LGMDR1 cells, opening the possibility of their use as therapeutic options.
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27
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De Bem THC, Tinning H, Vasconcelos EJR, Wang D, Forde N. Endometrium On-a-Chip Reveals Insulin- and Glucose-induced Alterations in the Transcriptome and Proteomic Secretome. Endocrinology 2021; 162:6167824. [PMID: 33693651 PMCID: PMC8143652 DOI: 10.1210/endocr/bqab054] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Indexed: 12/28/2022]
Abstract
The molecular interactions between the maternal environment and the developing embryo are key for early pregnancy success and are influenced by factors such as maternal metabolic status. Our understanding of the mechanism(s) through which these individual nutritional stressors alter endometrial function and the in utero environment for early pregnancy success is, however, limited. Here we report, for the first time, the use of an endometrium-on-a-chip microfluidics approach to produce a multicellular endometrium in vitro. Isolated endometrial cells (epithelial and stromal) from the uteri of nonpregnant cows in the early luteal phase (Days 4-7) were seeded in the upper chamber of the device (epithelial cells; 4-6 × 104 cells/mL) and stromal cells seeded in the lower chamber (1.5-2 × 104 cells/mL). Exposure of cells to different concentrations of glucose (0.5, 5.0, or 50 mM) or insulin (Vehicle, 1 or 10 ng/mL) was performed at a flow rate of 1 µL/minute for 72 hours. Quantitative differences in the cellular transcriptome and the secreted proteome of in vitro-derived uterine luminal fluid were determined by RNA-sequencing and tandem mass tagging mass spectrometry, respectively. High glucose concentrations altered 21 and 191 protein-coding genes in epithelial and stromal cells, respectively (P < .05), with a dose-dependent quantitative change in the protein secretome (1 and 23 proteins). Altering insulin concentrations resulted in limited transcriptional changes including transcripts for insulin-like binding proteins that were cell specific but altered the quantitative secretion of 196 proteins. These findings highlight 1 potential mechanism by which changes to maternal glucose and insulin alter uterine function.
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Affiliation(s)
- Tiago H C De Bem
- Discovery and Translational Sciences Department, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, UK
- Departamento de Medicina Veterinária, Faculdade de Zootecnia e Engenharia de Alimentos, Universidade de São Paulo, Pirassununga, SP, Brazil
| | - Haidee Tinning
- Discovery and Translational Sciences Department, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, UK
| | | | | | - Niamh Forde
- Discovery and Translational Sciences Department, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, UK
- LeedsOmics, University of Leeds, Leeds, UK
- Correspondence: Niamh Forde, PhD, University of Leeds, LIGHT Laboratories, Clarendon Way, LS2 9JT, Leeds, UK.
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28
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Therapeutically actionable signaling node to rescue AURKA driven loss of primary cilia in VHL-deficient cells. Sci Rep 2021; 11:10461. [PMID: 34002003 PMCID: PMC8128866 DOI: 10.1038/s41598-021-89933-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 05/04/2021] [Indexed: 12/30/2022] Open
Abstract
Loss of primary cilia in cells deficient for the tumor suppressor von Hippel Lindau (VHL) arise from elevated Aurora Kinase A (AURKA) levels. VHL in its role as an E3 ubiquitin ligase targets AURKA for degradation and in the absence of VHL, high levels of AURKA result in destabilization of the primary cilium. We identified NVP-BEZ235, a dual PI3K/AKT and mTOR inhibitor, in an image-based high throughput screen, as a small molecule that restored primary cilia in VHL-deficient cells. We identified the ability of AKT to modulate AURKA expression at the transcript and protein level. Independent modulation of AKT and mTOR signaling decreased AURKA expression in cells confirming AURKA as a new signaling node downstream of the PI3K cascade. Corroborating these data, a genetic knockdown of AKT in cells deficient for VHL rescued the ability of these cells to ciliate. Finally, inhibition of AKT/mTOR using NVP-BEZ235 was efficacious in reducing tumor burden in a 786-0 xenograft model of renal cell carcinoma. These data highlight a previously unappreciated signaling node downstream of the AKT/mTOR pathway via AURKA that can be targeted in VHL-null cells to restore ciliogenesis.
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29
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Papadopoli D, Pollak M, Topisirovic I. The role of GSK3 in metabolic pathway perturbations in cancer. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:119059. [PMID: 33989699 DOI: 10.1016/j.bbamcr.2021.119059] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/16/2021] [Accepted: 04/17/2021] [Indexed: 01/11/2023]
Abstract
Malignant transformation and tumor progression are accompanied by significant perturbations in metabolic programs. As such, cancer cells support high ATP turnover to construct the building blocks needed to fuel neoplastic growth. The coordination of metabolic networks in malignant cells is dependent on the collaboration with cellular signaling pathways. Glycogen synthase kinase 3 (GSK3) lies at the convergence of several signaling axes, including the PI3K/AKT/mTOR, AMPK, and Wnt pathways, which influence cancer initiation, progression and therapeutic responses. Accordingly, GSK3 modulates metabolic processes, including protein and lipid synthesis, glucose and mitochondrial metabolism, as well as autophagy. In this review, we highlight current knowledge of the role of GSK3 in metabolic perturbations in cancer.
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Affiliation(s)
- David Papadopoli
- Lady Davis Institute for Medical Research, 3755 Chemin de la Côte-Sainte-Catherine, Montréal, QC H3T 1E2, Canada; Gerald Bronfman Department of Oncology, McGill University, 5100 Maisonneuve Blvd West, Montréal, QC H4A 3T2, Canada.
| | - Michael Pollak
- Lady Davis Institute for Medical Research, 3755 Chemin de la Côte-Sainte-Catherine, Montréal, QC H3T 1E2, Canada; Gerald Bronfman Department of Oncology, McGill University, 5100 Maisonneuve Blvd West, Montréal, QC H4A 3T2, Canada; Department of Medicine, Division of Experimental Medicine, McGill University, 1001 Décarie Blvd, Montréal, QC H4A 3J1, Canada
| | - Ivan Topisirovic
- Lady Davis Institute for Medical Research, 3755 Chemin de la Côte-Sainte-Catherine, Montréal, QC H3T 1E2, Canada; Gerald Bronfman Department of Oncology, McGill University, 5100 Maisonneuve Blvd West, Montréal, QC H4A 3T2, Canada; Department of Medicine, Division of Experimental Medicine, McGill University, 1001 Décarie Blvd, Montréal, QC H4A 3J1, Canada; Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Montréal, QC H3G 1Y6, Canada
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30
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Sriram D, Dayma K, Devi AS, Raghawan AK, Rawat S, Radha V. Complex formation and reciprocal regulation between GSK3β and C3G. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:118964. [PMID: 33450305 DOI: 10.1016/j.bbamcr.2021.118964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 01/05/2021] [Accepted: 01/11/2021] [Indexed: 11/16/2022]
Abstract
GSK3β, a ubiquitously expressed Ser/Thr kinase, regulates cell metabolism, proliferation and differentiation. Its activity is spatially and temporally regulated dependent on external stimuli and interacting partners, and its deregulation is associated with various human disorders. In this study, we identify C3G (RapGEF1), a protein essential for mammalian embryonic development as an interacting partner and substrate of GSK3β. In vivo and in vitro interaction assays demonstrated that GSK3β and Akt are present in complex with C3G. Molecular modelling and mutational analysis identified a domain in C3G that aids interaction with GSK3β, and overlaps with its nuclear export sequence. GSK3β phosphorylates C3G on primed as well as unprimed sites, and regulates its subcellular localization. Over-expression of C3G resulted in activation of Akt and inactivation of GSK3β. Huntingtin aggregate formation, dependent on GSK3β inhibition, was enhanced upon C3G overexpression. Stable clones of C2C12 cells generated by CRISPR/Cas9 mediated knockdown of C3G, that cannot differentiate, show reduced Akt activity and S9-GSK3β phosphorylation compared to wild type cells. Co-expression of catalytically active GSK3β inhibited C3G induced myocyte differentiation. C3G mutant defective for GSK3β phosphorylation, does not alter S9-GSK3β phosphorylation and, is compromised for inducing myocyte differentiation. Our results show complex formation and reciprocal regulation between GSK3β and C3G. We have identified a novel function of C3G as a negative regulator of GSK3β, a property important for its ability to induce myogenic differentiation.
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Affiliation(s)
- Divya Sriram
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Kunal Dayma
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Ambure Sharada Devi
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | | | - Shivali Rawat
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - Vegesna Radha
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India.
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31
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Robles-Flores M, Moreno-Londoño AP, Castañeda-Patlán MC. Signaling Pathways Involved in Nutrient Sensing Control in Cancer Stem Cells: An Overview. Front Endocrinol (Lausanne) 2021; 12:627745. [PMID: 33828530 PMCID: PMC8020906 DOI: 10.3389/fendo.2021.627745] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 02/18/2021] [Indexed: 12/14/2022] Open
Abstract
Cancer cells characteristically have a high proliferation rate. Because tumor growth depends on energy-consuming anabolic processes, including biosynthesis of protein, lipid, and nucleotides, many tumor-associated conditions, including intermittent oxygen deficiency due to insufficient vascularization, oxidative stress, and nutrient deprivation, results from fast growth. To cope with these environmental stressors, cancer cells, including cancer stem cells, must adapt their metabolism to maintain cellular homeostasis. It is well- known that cancer stem cells (CSC) reprogram their metabolism to adapt to live in hypoxic niches. They usually change from oxidative phosphorylation to increased aerobic glycolysis even in the presence of oxygen. However, as opposed to most differentiated cancer cells relying on glycolysis, CSCs can be highly glycolytic or oxidative phosphorylation-dependent, displaying high metabolic plasticity. Although the influence of the metabolic and nutrient-sensing pathways on the maintenance of stemness has been recognized, the molecular mechanisms that link these pathways to stemness are not well known. Here in this review, we describe the most relevant signaling pathways involved in nutrient sensing and cancer cell survival. Among them, Adenosine monophosphate (AMP)-activated protein kinase (AMPK) pathway, mTOR pathway, and Hexosamine Biosynthetic Pathway (HBP) are critical sensors of cellular energy and nutrient status in cancer cells and interact in complex and dynamic ways.
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Affiliation(s)
- Martha Robles-Flores
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - Angela P Moreno-Londoño
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
| | - M Cristina Castañeda-Patlán
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
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Larsen LJ, Møller LB. Crosstalk of Hedgehog and mTORC1 Pathways. Cells 2020; 9:cells9102316. [PMID: 33081032 PMCID: PMC7603200 DOI: 10.3390/cells9102316] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/30/2020] [Accepted: 10/13/2020] [Indexed: 02/07/2023] Open
Abstract
Hedgehog (Hh) signaling and mTOR signaling, essential for embryonic development and cellular metabolism, are both coordinated by the primary cilium. Observations from cancer cells strongly indicate crosstalk between Hh and mTOR signaling. This hypothesis is supported by several studies: Evidence points to a TGFβ-mediated crosstalk; Increased PI3K/AKT/mTOR activity leads to increased Hh signaling through regulation of the GLI transcription factors; increased Hh signaling regulates mTORC1 activity positively by upregulating NKX2.2, leading to downregulation of negative mTOR regulators; GSK3 and AMPK are, as members of both signaling pathways, potentially important links between Hh and mTORC1 signaling; The kinase DYRK2 regulates Hh positively and mTORC1 signaling negatively. In contrast, both positive and negative regulation of Hh has been observed for DYRK1A and DYRK1B, which both regulate mTORC1 signaling positively. Based on crosstalk observed between cilia, Hh, and mTORC1, we suggest that the interaction between Hh and mTORC1 is more widespread than it appears from our current knowledge. Although many studies focusing on crosstalk have been carried out, contradictory observations appear and the interplay involving multiple partners is far from solved.
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Saftig P, Puertollano R. How Lysosomes Sense, Integrate, and Cope with Stress. Trends Biochem Sci 2020; 46:97-112. [PMID: 33012625 DOI: 10.1016/j.tibs.2020.09.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 12/17/2022]
Abstract
Lysosomes are in the center of the cellular control of catabolic and anabolic processes. These membrane-surrounded acidic organelles contain around 70 hydrolases, 200 membrane proteins, and numerous accessory proteins associated with the cytosolic surface of lysosomes. Accessory and transmembrane proteins assemble in signaling complexes that sense and integrate multiple signals and transmit the information to the nucleus. This communication allows cells to respond to changes in multiple environmental conditions, including nutrient levels, pathogens, energy availability, and lysosomal damage, with the goal of restoring cellular homeostasis. This review summarizes our current understanding of the major molecular players and known pathways that are involved in control of metabolic and stress responses that either originate from lysosomes or regulate lysosomal functions.
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Affiliation(s)
- Paul Saftig
- Biochemical Institute, Christian-Albrechts-Universität Kiel, Kiel, Germany.
| | - Rosa Puertollano
- Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health, Bethesda, MD 20892, USA.
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Lee MF, Trotman LC. PTEN: Bridging Endocytosis and Signaling. Cold Spring Harb Perspect Med 2020; 10:cshperspect.a036103. [PMID: 31818848 DOI: 10.1101/cshperspect.a036103] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The transduction of signals in the PTEN/PI3-kinase (PI3K) pathway is built around a phosphoinositide (PIP) lipid messenger, phosphatidylinositol trisphosphate, PI(3,4,5)P3 or PIP3 Another, more ancient role of this family of messengers is the control of endocytosis, where a handful of separate PIPs act like postal codes. Prominent among them is PI(3)P, which helps to ensure that endocytic vesicles, their cargo, and membranes themselves reach their correct destinations. Traditionally, the cancer and the endocytic functions of the PI3K signaling pathway have been studied by cancer and membrane biologists, respectively, with some notable but overall minimal overlap. Modern microscopy has enabled monitoring of the PTEN/PI3K pathway in action. Here, we explore the flurry of groundbreaking concepts emerging from those efforts. The discovery that PTEN contains an autonomous PI(3)P reader domain, fused to the catalytic PIP3 eraser domain has prompted us to explore the relationship between PI3K signaling and endocytosis. This revealed how PTEN can achieve signal termination in a precisely controlled fashion, because endocytosis can package the PIP3 signal into discrete units that PTEN will erase. We explore how PTEN can bridge the worlds of endocytosis and PI3K signaling and discuss progress on how PI3K/AKT signaling can be acting from internal membranes. We discuss how the PTEN/PI3K system for growth control may have emerged from principles of endocytosis, and how this development could have affected the evolution of multicellular organisms.
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Affiliation(s)
- Matthew F Lee
- Watson School of Biological Sciences, Cold Spring Harbor, New York 11724, USA
| | - Lloyd C Trotman
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
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Lee S, Choi EJ, Cho EJ, Lee YB, Lee JH, Yu SJ, Yoon JH, Kim YJ. Inhibition of PI3K/Akt signaling suppresses epithelial-to-mesenchymal transition in hepatocellular carcinoma through the Snail/GSK-3/beta-catenin pathway. Clin Mol Hepatol 2020; 26:529-539. [PMID: 32829570 PMCID: PMC7641573 DOI: 10.3350/cmh.2019.0056n] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 06/10/2020] [Indexed: 12/17/2022] Open
Abstract
Background/Aims Patients with advanced hepatocellular carcinoma (HCC) have a poor prognosis due to the lack of effective systemic therapies. Epithelial-to-mesenchymal transition (EMT) is a pivotal event in tumor progression, during which cancer cells acquire invasive properties. In this study, we investigated the effects of phosphatidylinositol 3-kinase (PI3K) inhibitors, including LY294002 and idelalisib, on the EMT features of HCC cells in vitro. Methods Human HCC cell lines, including Huh-BAT and HepG2, were used in this study. Cell proliferation was measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide, and cell cycle distributions were evaluated using a flow cytometer by propidium iodide staining. Immunofluorescence staining, quantitative real-time polymerase chain reaction, and immunoblotting were performed to detect EMT-associated changes. Results PI3K inhibitors suppressed the proliferation and invasion of HCC cells and deregulated the expression of EMT markers, as indicated by increased expression of E-cadherin, an epithelial marker, and decreased expression of N-cadherin, a mesenchymal marker, and Snail, a transcription factor implicated in EMT regulation. Furthermore, LY294002 and idelalisib inhibited the phosphorylation of GSK-3β and induced the nuclear translocation of GSK-3β, which corresponded to the downregulation of Snail and β-catenin expressions in Huh-BAT and HepG2 cells. Conclusions The inhibition of PI3K/Akt signaling decreases Snail expression by enhancing the nuclear translocation of GSK-3β, which suppresses EMT in HCC cells, suggesting the potential clinical application of PI3K inhibitors for HCC treatment.
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Affiliation(s)
- Seulki Lee
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Ji Choi
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Ju Cho
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yun Bin Lee
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jeong-Hoon Lee
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Su Jong Yu
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jung-Hwan Yoon
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yoon Jun Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
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36
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Acidic Compartment Size, Positioning, and Function during Myogenesis and Their Modulation by the Wnt/Beta-Catenin Pathway. BIOMED RESEARCH INTERNATIONAL 2020; 2020:6404230. [PMID: 32685512 PMCID: PMC7322607 DOI: 10.1155/2020/6404230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/07/2020] [Accepted: 05/12/2020] [Indexed: 02/06/2023]
Abstract
Lysosomes and acidic compartments are involved in breaking down of macromolecules, membrane recycling, and regulation of signaling pathways. Here, we analyzed the role of acidic compartments during muscle differentiation and the involvement of the Wnt/beta-catenin pathway in lysosomal function during myogenesis. Acridine orange was used to localize and quantify acidic cellular compartments in primary cultures of embryonic muscle cells from Gallus gallus. Our results show an increase in acidic compartment size and area, as well as changes in their positioning during the initial steps of myogenesis. The inhibition of lysosomal function by either the chloroquine Lys05 or the downregulation of LAMP-2 with siRNA impaired chick myogenesis, by inhibiting myoblast fusion. Two activators of the Wnt/beta-catenin pathway, BIO and Wnt3a, were able to rescue the inhibitory effects of Lys05 in myogenesis. These results suggest a new role for the Wnt/beta-catenin pathway in the regulation of acidic compartment size, positioning, and function in muscle cells.
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Temprine K, Campbell NR, Huang R, Langdon EM, Simon-Vermot T, Mehta K, Clapp A, Chipman M, White RM. Regulation of the error-prone DNA polymerase Polκ by oncogenic signaling and its contribution to drug resistance. Sci Signal 2020; 13:13/629/eaau1453. [PMID: 32345725 DOI: 10.1126/scisignal.aau1453] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The DNA polymerase Polκ plays a key role in translesion synthesis, an error-prone replication mechanism. Polκ is overexpressed in various tumor types. Here, we found that melanoma and lung and breast cancer cells experiencing stress from oncogene inhibition up-regulated the expression of Polκ and shifted its localization from the cytoplasm to the nucleus. This effect was phenocopied by inhibition of the kinase mTOR, by induction of ER stress, or by glucose deprivation. In unstressed cells, Polκ is continually transported out of the nucleus by exportin-1. Inhibiting exportin-1 or overexpressing Polκ increased the abundance of nuclear-localized Polκ, particularly in response to the BRAFV600E-targeted inhibitor vemurafenib, which decreased the cytotoxicity of the drug in BRAFV600E melanoma cells. These observations were analogous to how Escherichia coli encountering cell stress and nutrient deprivation can up-regulate and activate DinB/pol IV, the bacterial ortholog of Polκ, to induce mutagenesis that enables stress tolerance or escape. However, we found that the increased expression of Polκ was not excessively mutagenic, indicating that noncatalytic or other functions of Polκ could mediate its role in stress responses in mammalian cells. Repressing the expression or nuclear localization of Polκ might prevent drug resistance in some cancer cells.
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Affiliation(s)
- Kelsey Temprine
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.,Gerstner Sloan Kettering Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Nathaniel R Campbell
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.,Tri-Institutional M.D./Ph.D. Program, Weill Cornell Medical College, New York, NY 10065, USA
| | - Richard Huang
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Erin M Langdon
- University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Theresa Simon-Vermot
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Krisha Mehta
- Division of General Internal Medicine, Department of Medicine, Weill Cornell Medical College, New York, NY 10065, USA
| | | | - Mollie Chipman
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.,Gerstner Sloan Kettering Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Richard M White
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
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38
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Prossomariti A, Piazzi G, Alquati C, Ricciardiello L. Are Wnt/β-Catenin and PI3K/AKT/mTORC1 Distinct Pathways in Colorectal Cancer? Cell Mol Gastroenterol Hepatol 2020; 10:491-506. [PMID: 32334125 PMCID: PMC7369353 DOI: 10.1016/j.jcmgh.2020.04.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 04/05/2020] [Accepted: 04/09/2020] [Indexed: 02/07/2023]
Abstract
Wnt/β-catenin and phosphatidylinositol-3-kinase/protein kinase B/mammalian target of rapamycin complex 1 (PI3K/AKT/mTORC1) pathways both are critically involved in colorectal cancer (CRC) development, although they are implicated in the modulation of distinct oncogenic mechanisms. In homeostatic and pathologic conditions, these pathways show a fine regulation based mainly on feedback mechanisms, and are connected at multiple levels involving both upstream and downstream common effectors. The ability of the Wnt/β-catenin and PI3K/AKT/mTORC1 pathways to reciprocally control themselves represents one of the main resistance mechanisms to selective inhibitors in CRC, leading to the hypothesis that in specific settings, particularly in cancer driven by genetic alterations in Wnt/β-catenin signaling, the relationship between Wnt/β-catenin and PI3K/AKT/mTORC1 pathways could be so close that they should be considered as a unique therapeutic target. This review provides an update on the Wnt/β-catenin and PI3K/AKT/mTORC1 pathway interconnections in CRC, describing the main molecular players and the potential implications of combined inhibitors as an approach for CRC chemoprevention and treatment.
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Affiliation(s)
- Anna Prossomariti
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy,Center for Applied Biomedical Research, S. Orsola Hospital, University of Bologna, Bologna, Italy,Anna Prossomariti, PhD, Center for Applied Biomedical Research, S. Orsola Hospital, Via Massarenti 9, 40138, Bologna, Italy. fax: (39) 051-2143902.
| | - Giulia Piazzi
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy,Center for Applied Biomedical Research, S. Orsola Hospital, University of Bologna, Bologna, Italy
| | - Chiara Alquati
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy,Center for Applied Biomedical Research, S. Orsola Hospital, University of Bologna, Bologna, Italy
| | - Luigi Ricciardiello
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy,Center for Applied Biomedical Research, S. Orsola Hospital, University of Bologna, Bologna, Italy,Correspondence Address correspondence to: Luigi Ricciardiello, MD, Department of Medical and Surgical Sciences, Via Massarenti 9, 40138, Bologna, Italy. fax: (39) 051-2143381
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GSK3: A Kinase Balancing Promotion and Resolution of Inflammation. Cells 2020; 9:cells9040820. [PMID: 32231133 PMCID: PMC7226814 DOI: 10.3390/cells9040820] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 12/11/2022] Open
Abstract
GSK3 has been implicated for years in the regulation of inflammation and addressed in a plethora of scientific reports using a variety of experimental (disease) models and approaches. However, the specific role of GSK3 in the inflammatory process is still not fully understood and controversially discussed. Following a detailed overview of structure, function, and various regulatory levels, this review focusses on the immunoregulatory functions of GSK3, including the current knowledge obtained from animal models. Its impact on pro-inflammatory cytokine/chemokine profiles, bacterial/viral infections, and the modulation of associated pro-inflammatory transcriptional and signaling pathways is discussed. Moreover, GSK3 contributes to the resolution of inflammation on multiple levels, e.g., via the regulation of pro-resolving mediators, the clearance of apoptotic immune cells, and tissue repair processes. The influence of GSK3 on the development of different forms of stimulation tolerance is also addressed. Collectively, the role of GSK3 as a kinase balancing the initiation/perpetuation and the amelioration/resolution of inflammation is highlighted.
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40
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Kim JW, Yang JH, Kim EJ. SIRT1 and AROS suppress doxorubicin-induced apoptosis via inhibition of GSK3β activity in neuroblastoma cells. Anim Cells Syst (Seoul) 2020; 24:53-59. [PMID: 32158616 PMCID: PMC7048222 DOI: 10.1080/19768354.2020.1726461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/14/2020] [Accepted: 02/03/2020] [Indexed: 01/27/2023] Open
Abstract
SIRT1, the best-characterized member of the sirtuin family of deacetylases, is involved in cancer, apoptosis, inflammation, and metabolism. Active regulator of SIRT1 (AROS) was the first identified direct regulator of SIRT1. An increasing number of reports have indicated that SIRT1 plays an important role in controlling brain tumors. Here, we demonstrated that depletion of SIRT1 and AROS increases doxorubicin-mediated apoptosis in human neuroblastoma SH-SY5Y cells. Glycogen synthase kinase 3β (GSK3β) promoted doxorubicin-mediated apoptosis, but this effect was abolished by overexpression of SIRT1 and AROS. Interestingly, SIRT1 and AROS interacted with GSK3β and increased inhibitory phosphorylation of GSK3β on Ser9. Finally, we determined that AROS cooperates with SIRT1 to suppress GSK3β acetylation. Taken together, our results suggest that SIRT1 and AROS inhibit GSK3β activity and provide additional insight into drug resistance in the treatment of neuroblastoma.
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Affiliation(s)
- Jeong Woo Kim
- Department of Molecular Biology, Dankook University, Cheonan-si, Korea
| | - Ji Hye Yang
- Department of Molecular Biology, Dankook University, Cheonan-si, Korea
| | - Eun-Joo Kim
- Department of Molecular Biology, Dankook University, Cheonan-si, Korea
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41
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Evangelisti C, Chiarini F, Paganelli F, Marmiroli S, Martelli AM. Crosstalks of GSK3 signaling with the mTOR network and effects on targeted therapy of cancer. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1867:118635. [PMID: 31884070 DOI: 10.1016/j.bbamcr.2019.118635] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 12/18/2019] [Indexed: 02/06/2023]
Abstract
The introduction of therapeutics targeting specific tumor-promoting oncogenic or non-oncogenic signaling pathways has revolutionized cancer treatment. Mechanistic (previously mammalian) target of rapamycin (mTOR), a highly conserved Ser/Thr kinase, is a central hub of the phosphatidylinositol 3-kinase (PI3K)/Akt/mTOR network, one of the most frequently deregulated signaling pathways in cancer, that makes it an attractive target for therapy. Numerous mTOR inhibitors have progressed to clinical trials and two of them have been officially approved as anticancer therapeutics. However, mTOR-targeting drugs have met with a very limited success in cancer patients. Frequently, the primary impediment to a successful targeted therapy in cancer is drug-resistance, either from the very beginning of the therapy (innate resistance) or after an initial response and upon repeated drug treatment (evasive or acquired resistance). Drug-resistance leads to treatment failure and relapse/progression of the disease. Resistance to mTOR inhibitors depends, among other reasons, on activation/deactivation of several signaling pathways, included those regulated by glycogen synthase kinase-3 (GSK3), a protein that targets a vast number of substrates in its repertoire, thereby orchestrating many processes that include cell proliferation and survival, metabolism, differentiation, and stemness. A detailed knowledge of the rewiring of signaling pathways triggered by exposure to mTOR inhibitors is critical to our understanding of the consequences such perturbations cause in tumors, including the emergence of drug-resistant cells. Here, we provide the reader with an updated overview of intricate circuitries that connect mTOR and GSK3 and we relate them to the efficacy (or lack of efficacy) of mTOR inhibitors in cancer cells.
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Affiliation(s)
- Camilla Evangelisti
- CNR Institute of Molecular Genetics, 40136 Bologna, BO, Italy; IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, BO, Italy
| | - Francesca Chiarini
- CNR Institute of Molecular Genetics, 40136 Bologna, BO, Italy; IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, BO, Italy
| | - Francesca Paganelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, BO, Italy
| | - Sandra Marmiroli
- Department of Biomedical, Metabolical, and Neurological Sciences, University of Modena and Reggio Emilia, 41124 Modena, MO, Italy
| | - Alberto M Martelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, BO, Italy.
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Fekri F, Abousawan J, Bautista S, Orofiamma L, Dayam RM, Antonescu CN, Karshafian R. Targeted enhancement of flotillin-dependent endocytosis augments cellular uptake and impact of cytotoxic drugs. Sci Rep 2019; 9:17768. [PMID: 31780775 PMCID: PMC6882852 DOI: 10.1038/s41598-019-54062-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 11/07/2019] [Indexed: 12/23/2022] Open
Abstract
Cellular uptake is limiting for the efficacy of many cytotoxic drugs used to treat cancer. Identifying endocytic mechanisms that can be modulated with targeted, clinically-relevant interventions is important to enhance the efficacy of various cancer drugs. We identify that flotillin-dependent endocytosis can be targeted and upregulated by ultrasound and microbubble (USMB) treatments to enhance uptake and efficacy of cancer drugs such as cisplatin. USMB involves targeted ultrasound following administration of encapsulated microbubbles, used clinically for enhanced ultrasound image contrast. USMB treatments robustly enhanced internalization of the molecular scaffold protein flotillin, as well as flotillin-dependent fluid-phase internalization, a phenomenon dependent on the protein palmitoyltransferase DHHC5 and the Src-family kinase Fyn. USMB treatment enhanced DNA damage and cell killing elicited by the cytotoxic agent cisplatin in a flotillin-dependent manner. Thus, flotillin-dependent endocytosis can be modulated by clinically-relevant USMB treatments to enhance drug uptake and efficacy, revealing an important new strategy for targeted drug delivery for cancer treatment.
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Affiliation(s)
- Farnaz Fekri
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada
- Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, M5B 2K3, Canada
| | - John Abousawan
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada
- Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, M5B 2K3, Canada
| | - Stephen Bautista
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada
- Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, M5B 2K3, Canada
| | - Laura Orofiamma
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada
- Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, M5B 2K3, Canada
| | - Roya M Dayam
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada
- Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, M5B 2K3, Canada
| | - Costin N Antonescu
- Department of Chemistry and Biology, Ryerson University, Toronto, Canada.
- Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, M5B 2K3, Canada.
- Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, Ontario, Canada.
| | - Raffi Karshafian
- Graduate Program in Molecular Science, Ryerson University, Toronto, Ontario, M5B 2K3, Canada.
- Department of Physics, Ryerson University, Toronto, Ontario, M5B 2K3, Canada.
- Institute for Biomedical Engineering, Science and Technology (iBEST), a partnership between Ryerson University and St. Michael's Hospital, Toronto, Ontario, Canada.
- Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, Ontario, Canada.
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Xu K, Xie X, Qi G, Weng P, Hu Z, Han K, Yuan H, Li Y, Ran X, Lin G, Hu C. Grass carp STK38 regulates IFN I expression by decreasing the phosphorylation level of GSK3β. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 99:103410. [PMID: 31175887 DOI: 10.1016/j.dci.2019.103410] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/04/2019] [Accepted: 06/04/2019] [Indexed: 06/09/2023]
Abstract
As a member of NDR protein kinase family and a novel protein kinase of Hippo signal pathway, Serine/threonine kinase 38 (STK38) plays a very significant role in the innate immune. In mammals, STK38 performs its function by combining with GSK3β. Nowadays, there are few reports of STK38 in fish. In order to explain the function of fish STK38 in the innate immunity, we cloned the ORF of grass carp (Ctenopharyngodon idella) STK38 (CiSTK38) and the related kinase GSK3β (CiGSK3β). Phylogenetic trees revealed that CiSTK38 and CiGSK3β evolved closer kinship with sinocyclocheilus grahami STK38 and siniperca chuatsi GSK3β respectively. CiSTK38 and CiGSK3β can respond to the intradermal injection of poly (I:C) in grass carp different tissues and the transfection of poly I:C in CIK cells. Subcellular localization revealed the CiGSK3β were broadly distributed through the cytoplasm, whereas CiSTK38 were observed both in cytoplasm and nucleus. However, when they were co-transferred into cells, the two proteins were found to aggregate in the nucleus. GST-pulldown and co-immunoprecipitation analysis revealed that CiSTK38 can physically interact with CiGSK3β. Phos-tag PAGE illustrated CiSTK38 can decrease the phosphorylation and auto-phosphorylation level of CiGSK3β at Ser9 and at Tyr216. To investigate the functional correlation between CiSTK38 and CiGSK3β, we overexpressed CiSTK38 and CiGSK3β in CIK cells and found that they can up-regulate the expression of IFN I. In short, we demonstrated that CiSTK38 can confer CiGSK3β kinase activity by reducing its phosphorylation level. Result from this study strongly suggested that the anti-viral immune effects elicited by poly (I:C) in part were mediated through activation of CiGSK3β. The findings provided scientific basis for the anti-viral immune mechanism of STK38 and GSK3β in fish.
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Affiliation(s)
- Kang Xu
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Xiaofen Xie
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Guoqin Qi
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Panwei Weng
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Zhizhen Hu
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Kun Han
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Huiwen Yuan
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Yinping Li
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Xiaoqin Ran
- College of Life Science, Nanchang University, Nanchang, 330031, China
| | - Gang Lin
- College of Life Science, Nanchang University, Nanchang, 330031, China.
| | - Chengyu Hu
- College of Life Science, Nanchang University, Nanchang, 330031, China.
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Effect of Konjac Mannan Oligosaccharides on Glucose Homeostasis via the Improvement of Insulin and Leptin Resistance In Vitro and In Vivo. Nutrients 2019; 11:nu11081705. [PMID: 31344867 PMCID: PMC6723648 DOI: 10.3390/nu11081705] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 07/20/2019] [Accepted: 07/22/2019] [Indexed: 12/15/2022] Open
Abstract
Functional oligosaccharides, particularly konjac mannan oligosaccharides (KMOS), can regulate glucose metabolism. However, the molecular mechanisms involved in the hypoglycemic effect of KMOS remain largely unknown. Here, the effect of KMOS supplementation on glucose homeostasis was evaluated in both high-fat diet (HFD)-fed C57BL/6J mice and high-glucosamine-induced HepG2 cells. KMOS supplementation remarkably ameliorated the fasting blood glucose, glucose tolerance, and insulin tolerance of HFD-fed mice. Abnormalities of triglyceride and glycogen metabolism in the liver induced by the HFD were reversed by KMOS supplementation. The insulin signaling pathway was activated by KMOS, with stimulation of GLUT2 membrane translocation and glucose uptake in HepG2 cells via the AMPK pathway. Moreover, KMOS suppressed p-mTOR expression and stimulated the GSK-3β/CREB pathway via the AMPK pathway. KMOS significantly upregulated leptin receptor expression and downregulated PTP1B and SOCS3 levels in the liver and brain, with a decreased serum leptin concentration. Phosphorylation of JAK2 and STAT3 in the liver was activated by KMOS supplementation, while the expressions of Sirt1, Tfam, and Pgc1-α in the brain were elevated. Conclusively, KMOS attenuated HFD-induced glucose metabolism dysfunction through the regulation of insulin resistance and leptin resistance. This finding indicates that KMOS have potential value as an anti-hyperglycemic dietary supplement.
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Inpanathan S, Botelho RJ. The Lysosome Signaling Platform: Adapting With the Times. Front Cell Dev Biol 2019; 7:113. [PMID: 31281815 PMCID: PMC6595708 DOI: 10.3389/fcell.2019.00113] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 06/05/2019] [Indexed: 12/12/2022] Open
Abstract
Lysosomes are the terminal degradative compartment of autophagy, endocytosis and phagocytosis. What once was viewed as a simple acidic organelle in charge of macromolecular digestion has emerged as a dynamic organelle capable of integrating cellular signals and producing signal outputs. In this review, we focus on the concept that the lysosome surface serves as a platform to assemble major signaling hubs like mTORC1, AMPK, GSK3 and the inflammasome. These molecular assemblies integrate and facilitate cross-talk between signals such as amino acid and energy levels, membrane damage and infection, and ultimately enable responses such as autophagy, cell growth, membrane repair and microbe clearance. In particular, we review how molecular machinery like the vacuolar-ATPase proton pump, sestrins, the GATOR complexes, and the Ragulator, modulate mTORC1, AMPK, GSK3 and inflammation. We then elaborate how these signals control autophagy initiation and resolution, TFEB-mediated lysosome adaptation, lysosome remodeling, antigen presentation, inflammation, membrane damage repair and clearance. Overall, by being at the cross-roads for several membrane pathways, lysosomes have emerged as the ideal surveillance compartment to sense, integrate and elicit cellular behavior and adaptation in response to changing environmental and cellular conditions.
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Affiliation(s)
- Subothan Inpanathan
- Department of Chemistry and Biology, Graduate Program in Molecular Science, Ryerson University, Toronto, ON, Canada
| | - Roberto J Botelho
- Department of Chemistry and Biology, Graduate Program in Molecular Science, Ryerson University, Toronto, ON, Canada
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Sugiyama MG, Fairn GD, Antonescu CN. Akt-ing Up Just About Everywhere: Compartment-Specific Akt Activation and Function in Receptor Tyrosine Kinase Signaling. Front Cell Dev Biol 2019; 7:70. [PMID: 31131274 PMCID: PMC6509475 DOI: 10.3389/fcell.2019.00070] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/09/2019] [Indexed: 12/12/2022] Open
Abstract
The serine/threonine kinase Akt is a master regulator of many diverse cellular functions, including survival, growth, metabolism, migration, and differentiation. Receptor tyrosine kinases are critical regulators of Akt, as a result of activation of phosphatidylinositol-3-kinase (PI3K) signaling leading to Akt activation upon receptor stimulation. The signaling axis formed by receptor tyrosine kinases, PI3K and Akt, as well as the vast range of downstream substrates is thus central to control of cell physiology in many different contexts and tissues. This axis must be tightly regulated, as disruption of PI3K-Akt signaling underlies the pathology of many diseases such as cancer and diabetes. This sophisticated regulation of PI3K-Akt signaling is due in part to the spatial and temporal compartmentalization of Akt activation and function, including in specific nanoscale domains of the plasma membrane as well as in specific intracellular membrane compartments. Here, we review the evidence for localized activation of PI3K-Akt signaling by receptor tyrosine kinases in various specific cellular compartments, as well as that of compartment-specific functions of Akt leading to control of several fundamental cellular processes. This spatial and temporal control of Akt activation and function occurs by a large number of parallel molecular mechanisms that are central to regulation of cell physiology.
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Affiliation(s)
- Michael G. Sugiyama
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON, Canada
| | - Gregory D. Fairn
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON, Canada
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Costin N. Antonescu
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON, Canada
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