1
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Liu Z, Lyu X, Chen J, Zhang B, Xie S, Yuan Y, Sun L, Yuan S, Yu H, Ding J, Yang M. Arnicolide C Suppresses Tumor Progression by Targeting 14-3-3θ in Breast Cancer. Pharmaceuticals (Basel) 2024; 17:224. [PMID: 38399439 PMCID: PMC10892132 DOI: 10.3390/ph17020224] [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: 12/24/2023] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Background: Arnicolide C, which is isolated from Centipeda minima, has excellent antitumor effects. However, the potential impacts and related mechanisms of action of arnicolide C in breast cancer remain unknown. Methods: The viability of breast cancer cells was measured using MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and colony formation assays. For analysis of apoptosis and the cell cycle, flow cytometry was used. A molecular docking approach was used to explore the possible targets of arnicolide C. Western blot analysis was used to detect changes in the expression of 14-3-3θ and proteins in related pathways after arnicolide C treatment in breast cancer cells. The anti-breast cancer effect of arnicolide C in vivo was evaluated by establishing cell-derived xenograft (CDX) and patient-derived xenograft (PDX) models. Results: Arnicolide C inhibited proliferation, increased apoptosis, and induced G1 arrest. In particular, molecular docking analysis indicated that arnicolide C binds to 14-3-3θ. Arnicolide C reduced 14-3-3θ expression and inhibited its downstream signaling pathways linked to cell proliferation. Similar results were obtained in the CDX and PDX models. Conclusion: Arnicolide C can have an anti-breast cancer effect both in vitro and in vivo and can induce cell cycle arrest and increase apoptosis in vitro. The molecular mechanism may be related to the effect of arnicolide C on the expression level of 14-3-3θ. However, the specific mechanism through which arnicolide C affects 14-3-3θ protein expression still needs to be determined.
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Affiliation(s)
- Zhengrui Liu
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaodan Lyu
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Jiaxu Chen
- College of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Benteng Zhang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Siman Xie
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Yan Yuan
- Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Li Sun
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Shengtao Yuan
- Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
| | - Hong Yu
- Department of Pathology, The Affiliated Taizhou People’s Hospital of Nanjing Medical University, Taizhou 225300, China
| | - Jian Ding
- Jiangsu Center for Pharmacodynamics Research and Evaluation, China Pharmaceutical University, Nanjing 210009, China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Mei Yang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
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2
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Zhang Y, Yan M, Yu Y, Wang J, Jiao Y, Zheng M, Zhang S. 14-3-3ε: a protein with complex physiology function but promising therapeutic potential in cancer. Cell Commun Signal 2024; 22:72. [PMID: 38279176 PMCID: PMC10811864 DOI: 10.1186/s12964-023-01420-w] [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: 08/25/2023] [Accepted: 12/02/2023] [Indexed: 01/28/2024] Open
Abstract
Over the past decade, the role of the 14-3-3 protein has received increasing interest. Seven subtypes of 14-3-3 proteins exhibit high homology; however, each subtype maintains its specificity. The 14-3-3ε protein is involved in various physiological processes, including signal transduction, cell proliferation, apoptosis, autophagy, cell cycle regulation, repolarization of cardiac action, cardiac development, intracellular electrolyte homeostasis, neurodevelopment, and innate immunity. It also plays a significant role in the development and progression of various diseases, such as cardiovascular diseases, inflammatory diseases, neurodegenerative disorders, and cancer. These immense and various involvements of 14-3-3ε in diverse processes makes it a promising target for drug development. Although extensive research has been conducted on 14-3-3 dimers, studies on 14-3-3 monomers are limited. This review aimed to provide an overview of recent reports on the molecular mechanisms involved in the regulation of binding partners by 14-3-3ε, focusing on issues that could help advance the frontiers of this field. Video Abstract.
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Affiliation(s)
- Yue Zhang
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Man Yan
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Yongjun Yu
- Department of Colorectal Surgery, Tianjin Union Medical Center, Tianjin, 300121, People's Republic of China
| | - Jiangping Wang
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Yuqi Jiao
- Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, People's Republic of China
| | - Minying Zheng
- Department of Pathology, Tianjin Union Medical Center, Tianjin, 300071, People's Republic of China
| | - Shiwu Zhang
- Department of Pathology, Tianjin Union Medical Center, Tianjin, 300071, People's Republic of China.
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3
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Kamayirese S, Maity S, Dieckman LM, Hansen LA, Lovas S. Optimizing Phosphopeptide Structures That Target 14-3-3ε in Cutaneous Squamous Cell Carcinoma. ACS OMEGA 2024; 9:2719-2729. [PMID: 38250398 PMCID: PMC10795040 DOI: 10.1021/acsomega.3c07740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 01/23/2024]
Abstract
14-3-3ε is involved in various types of malignancies by increasing cell proliferation, promoting cell invasion, or inhibiting apoptosis. In cutaneous squamous cell carcinoma (cSCC), 14-3-3ε is overexpressed and mislocalized from the nucleus to the cytoplasm where it interacts with the cell division cycle 25 A (CDC25A) and suppresses apoptosis. Hence, inhibition of the 14-3-3ε-CDC25A interaction is an attractive target for promoting apoptosis in cSCC. In this work, we optimized the structure of our previously designed inhibitor of the 14-3-3ε-CDC25A interaction, pT, a phosphopeptide fragment corresponding to one of the two binding regions of CDC25A to 14-3-3ε. Starting from pT, we developed peptide analogs that bind 14-3-3ε with nanomolar affinities. Peptide analogs were designed by shortening the pT peptide and introducing modifications at position 510 of the pT(502-510) analog. Both molecular dynamics (MD) simulations and biophysical methods were used to determine peptide binding to 14-3-3ε. Shortening the pT peptide from 14 to 9 amino acid residues resulted in a peptide (pT(502-510)) that binds 14-3-3ε with a KD value of 45.2 nM. Gly to Phe substitution in position 510 of pT(502-510) led to further improvement in affinity (KD: 22.0 nM) of the peptide for 14-3-3ε. Our results suggest that the designed peptide analogs are potential candidates for inhibiting 14-3-3ε-CDC25A interactions in cSCC cells and thus inducing their apoptosis.
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Affiliation(s)
- Seraphine Kamayirese
- Department
of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, United States
| | - Sibaprasad Maity
- Department
of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, United States
| | - Lynne M. Dieckman
- Department
of Chemistry and Biochemistry, Creighton
University, Omaha, Nebraska 68178, United States
| | - Laura A. Hansen
- Department
of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, United States
| | - Sándor Lovas
- Department
of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, United States
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4
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Kamayirese S, Maity S, Dieckman LM, Hansen LA, Lovas S. Optimizing Phosphopeptide Structures That Target 14-3-3ε in Cutaneous Squamous Cell Carcinoma. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.03.560749. [PMID: 37873379 PMCID: PMC10592926 DOI: 10.1101/2023.10.03.560749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
14-3-3ε is involved in various types of malignancies by increasing cell proliferation, promoting cell invasion or inhibiting apoptosis. In cutaneous squamous cell carcinoma (cSCC), 14-3-3ε is over expressed and mislocalized from the nucleus to the cytoplasm where it interacts with the cell division cycle 25 A (CDC25A) and suppresses apoptosis. Hence inhibition of the 14-3-3ε - CDC25A interaction is an attractive target for promoting apoptosis in cSCC. In this work, we optimized the structure of our previously designed inhibitor of 14-3-3ε - CDC25A interaction, pT, a phosphopeptide fragment corresponding to one of the two binding regions of CDC25A to 14-3-3ε. Starting from pT, we developed peptide analogs that bind 14-3-3ε with nanomolar affinities. Peptide analogs were designed by shortening the pT peptide, and introducing modifications at position 510 of the pT(502-510) analog. Both molecular dynamics (MD) simulations and biophysical methods were used to determine peptides binding to 14-3-3ε. Shortening the pT peptide from 14 to 9 amino acid residues resulted in a peptide (pT(502-510)) that binds 14-3-3ε with a KD value of 45.2 nM. Gly to Phe substitution in position 510 of pT(502-510) led to further improvement in affinity (KD: 22.0 nM) of the peptide for 14-3-3ε. Our results suggest that the designed peptide analogs are potential candidates for inhibiting 14-3-3ε -CDC25A interactions in cSCC cells; thus, inducing their apoptosis.
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Affiliation(s)
- Seraphine Kamayirese
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, Unites States
| | - Sibaprasad Maity
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, Unites States
| | - Lynne M. Dieckman
- Department of Chemistry and Biochemistry, Creighton University, Omaha, Nebraska 68178, Unites States
| | - Laura A. Hansen
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, Unites States
| | - Sándor Lovas
- Department of Biomedical Sciences, Creighton University, Omaha, Nebraska 68178, Unites States
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5
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Javed A, Yarmohammadi M, Korkmaz KS, Rubio-Tomás T. The Regulation of Cyclins and Cyclin-Dependent Kinases in the Development of Gastric Cancer. Int J Mol Sci 2023; 24:ijms24032848. [PMID: 36769170 PMCID: PMC9917736 DOI: 10.3390/ijms24032848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/23/2023] [Accepted: 01/28/2023] [Indexed: 02/05/2023] Open
Abstract
Gastric cancer predominantly occurs in adenocarcinoma form and is characterized by uncontrolled growth and metastases of gastric epithelial cells. The growth of gastric cells is regulated by the action of several major cell cycle regulators including Cyclins and Cyclin-dependent kinases (CDKs), which act sequentially to modulate the life cycle of a living cell. It has been reported that inadequate or over-activity of these molecules leads to disturbances in cell cycle dynamics, which consequently results in gastric cancer development. Manny studies have reported the key roles of Cyclins and CDKs in the development and progression of the disease in either in vitro cell culture studies or in vivo models. We aimed to compile the evidence of molecules acting as regulators of both Cyclins and CDKs, i.e., upstream regulators either activating or inhibiting Cyclins and CDKs. The review entails an introduction to gastric cancer, along with an overview of the involvement of cell cycle regulation and focused on the regulation of various Cyclins and CDKs in gastric cancer. It can act as an extensive resource for developing new hypotheses for future studies.
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Affiliation(s)
- Aadil Javed
- Department of Bioengineering, Faculty of Engineering, Cancer Biology Laboratory, Ege University, Izmir 35040, Turkey
- Correspondence: (A.J.); (T.R.-T.)
| | - Mahdieh Yarmohammadi
- Department of Biology, Faculty of Sciences, Central Tehran Branch, Islamic Azad University, Tehran 33817-74895, Iran
| | - Kemal Sami Korkmaz
- Department of Bioengineering, Faculty of Engineering, Cancer Biology Laboratory, Ege University, Izmir 35040, Turkey
| | - Teresa Rubio-Tomás
- School of Medicine, University of Crete, 70013 Herakleion, Crete, Greece
- Correspondence: (A.J.); (T.R.-T.)
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6
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Casazza A, Van Helleputte L, Van Renterghem B, Pokreisz P, De Geest N, De Petrini M, Janssens T, Pellens M, Diricx M, Riera-Domingo C, Wozniak A, Mazzone M, Schöffski P, Defert O, Reyns G, Kindt N. PhAc-ALGP-Dox, a Novel Anticancer Prodrug with Targeted Activation and Improved Therapeutic Index. Mol Cancer Ther 2022; 21:568-581. [PMID: 35149549 PMCID: PMC9377749 DOI: 10.1158/1535-7163.mct-21-0518] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/13/2021] [Accepted: 02/08/2022] [Indexed: 01/07/2023]
Abstract
Clinical use of doxorubicin (Dox) is limited by cumulative myelo- and cardiotoxicity. This research focuses on the detailed characterization of PhAc-ALGP-Dox, a targeted tetrapeptide prodrug with a unique dual-step activation mechanism, designed to circumvent Dox-related toxicities and is ready for upcoming clinical investigation. Coupling Dox to a phosphonoacetyl (PhAc)-capped tetrapeptide forms the cell-impermeable, inactive compound, PhAc-ALGP-Dox. After extracellular cleavage by tumor-enriched thimet oligopeptidase-1 (THOP1), a cell-permeable but still biologically inactive dipeptide-conjugate is formed (GP-Dox), which is further processed intracellularly to Dox by fibroblast activation protein-alpha (FAPα) and/or dipeptidyl peptidase-4 (DPP4). In vitro, PhAc-ALGP-Dox is effective in various 2D- and 3D-cancer models, while showing improved safety toward normal epithelium, hematopoietic progenitors, and cardiomyocytes. In vivo, these results translate into a 10-fold higher tolerability and 5-fold greater retention of Dox in the tumor microenvironment compared with the parental drug. PhAc-ALGP-Dox demonstrates 63% to 96% tumor growth inhibition in preclinical models, an 8-fold improvement in efficacy in patient-derived xenograft (PDX) models, and reduced metastatic burden in a murine model of experimental lung metastasis, improving survival by 30%. The current findings highlight the potential clinical benefit of PhAc-ALGP-Dox, a targeted drug-conjugate with broad applicability, favorable tissue biodistribution, significantly improved tolerability, and tumor growth inhibition at primary and metastatic sites in numerous solid tumor models.
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Affiliation(s)
- Andrea Casazza
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | | | - Britt Van Renterghem
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Peter Pokreisz
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Natalie De Geest
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Marzia De Petrini
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Tom Janssens
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Marijke Pellens
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Marjan Diricx
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Carla Riera-Domingo
- Laboratory of Tumor Inflammation and Angiogenesis, Vesalius Research Center, VIB, Leuven, Belgium.,Laboratory of Tumor Inflammation and Angiogenesis, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Agnieszka Wozniak
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Massimiliano Mazzone
- Laboratory of Tumor Inflammation and Angiogenesis, Vesalius Research Center, VIB, Leuven, Belgium.,Laboratory of Tumor Inflammation and Angiogenesis, Department of Oncology, KU Leuven, Leuven, Belgium
| | - Patrick Schöffski
- Laboratory of Experimental Oncology, Department of Oncology, KU Leuven, Leuven, Belgium.,Department of General Medical Oncology, University Hospitals Leuven, Leuven Cancer Institute, Leuven, Belgium
| | - Olivier Defert
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Geert Reyns
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium
| | - Nele Kindt
- CoBioRes NV, Campus Gasthuisberg University of Leuven, Leuven, Belgium.,Corresponding Author: Nele Kindt, CoBioRes NV, Campus Gasthuisberg, CDG, bus 913 Herestraat 49, Leuven, Flanders B-3000, Belgium. E-mail:
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7
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Integrative Role of 14-3-3ε in Sleep Regulation. Int J Mol Sci 2021; 22:ijms22189748. [PMID: 34575915 PMCID: PMC8467329 DOI: 10.3390/ijms22189748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/30/2021] [Accepted: 09/02/2021] [Indexed: 11/21/2022] Open
Abstract
Sleep is a crucial factor for health and survival in all animals. In this study, we found by proteomic analysis that some cancer related proteins were impacted by the circadian clock. The 14-3-3ε protein, expression of which is activated by the circadian transcription factor Clock, regulates adult sleep of Drosophila independent of circadian rhythm. Detailed analysis of the sleep regulatory mechanism shows that 14-3-3ε directly targets the Ultrabithorax (Ubx) gene to activate transcription of the pigment dispersing factor (PDF). The dopamine receptor (Dop1R1) and the octopamine receptor (Oamb), are also involved in the 14-3-3ε pathway, which in 14-3-3ε mutant flies causes increases in the dopR1 and OAMB, while downregulation of the DopR1 and Oamb can restore the sleep phenotype caused by the 14-3-3ε mutation. In conclusion, 14-3-3ε is necessary for sleep regulation in Drosophila.
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8
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Jin M, Wu L, Chen S, Cai R, Dai Y, Yang H, Tang L, Li Y. Arsenic trioxide enhances the chemotherapeutic efficiency of cisplatin in cholangiocarcinoma cells via inhibiting the 14-3-3ε-mediated survival mechanism. Cell Death Discov 2020; 6:92. [PMID: 33024577 PMCID: PMC7505839 DOI: 10.1038/s41420-020-00330-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/31/2020] [Accepted: 09/06/2020] [Indexed: 12/19/2022] Open
Abstract
Cholangiocarcinoma (CCA) is the second most frequent primary liver carcinoma with high degrees of malignancy and mortality. Chemotherapy plays a key role in the treatment of CCA, however, the low chemotherapeutic efficiency leads to a bottleneck. So unraveling the potential mechanisms to enhance the efficiency (reduced the dosage and enhanced the effects of chemotherapy drugs) and identifying alternative therapeutic strategies in CCA are urgently needed. Here, we found that, in CCA cells, when cisplatin (CDDP) displayed anti-tumor effects, it activated 14-3-3ε simultaneously, which in turn formed a survival mechanism via the phosphorylation of phosphatidylinositol 3-kinase/protein kinase B (PI-3K/Akt). However, low concentrations of arsenic trioxide (ATO) could disrupt such survival mechanism and enhanced the efficiency. For the molecular mechanisms, ATO attenuated 14-3-3ε at both transcriptional and post-transcriptional (ubiquitination degradation) levels. Such repressive effect blocked the activation of PI-3K/Akt, and its downstream anti-apoptotic factors, B-cell lymphoma 2 (Bcl-2), and survivin. Collectively, our present study revealed that the synergistic effects of ATO and CDDP could be a novel approach for enhancing the efficiency, which provides an innovative therapeutic vision for the treatment of CCA.
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Affiliation(s)
- Ming Jin
- The Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 211166 Nanjing, China
| | - Liunan Wu
- The Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 211166 Nanjing, China
| | - Shuai Chen
- Department of General Surgery, The Affiliated Changzhou No. 2 Hospital of Nanjing Medical University, 213003 Changzhou, China
| | - Rong Cai
- The Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 211166 Nanjing, China
| | - Yi Dai
- Department of General Surgery, The Affiliated Changzhou No. 2 Hospital of Nanjing Medical University, 213003 Changzhou, China
| | - Haojun Yang
- Department of General Surgery, The Affiliated Changzhou No. 2 Hospital of Nanjing Medical University, 213003 Changzhou, China
| | - Liming Tang
- Department of General Surgery, The Affiliated Changzhou No. 2 Hospital of Nanjing Medical University, 213003 Changzhou, China
| | - Yuan Li
- The Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, 211166 Nanjing, China
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9
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Fan X, Cui L, Zeng Y, Song W, Gaur U, Yang M. 14-3-3 Proteins Are on the Crossroads of Cancer, Aging, and Age-Related Neurodegenerative Disease. Int J Mol Sci 2019; 20:ijms20143518. [PMID: 31323761 PMCID: PMC6678932 DOI: 10.3390/ijms20143518] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/15/2019] [Accepted: 07/16/2019] [Indexed: 12/14/2022] Open
Abstract
14-3-3 proteins are a family of conserved regulatory adaptor molecules which are expressed in all eukaryotic cells. These proteins participate in a variety of intracellular processes by recognizing specific phosphorylation motifs and interacting with hundreds of target proteins. Also, 14-3-3 proteins act as molecular chaperones, preventing the aggregation of unfolded proteins under conditions of cellular stress. Furthermore, 14-3-3 proteins have been shown to have similar expression patterns in tumors, aging, and neurodegenerative diseases. Therefore, we put forward the idea that the adaptor activity and chaperone-like activity of 14-3-3 proteins might play a substantial role in the above-mentioned conditions. Interestingly, 14-3-3 proteins are considered to be standing at the crossroads of cancer, aging, and age-related neurodegenerative diseases. There are great possibilities to improve the above-mentioned diseases and conditions through intervention in the activity of the 14-3-3 protein family.
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Affiliation(s)
- Xiaolan Fan
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Lang Cui
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Yao Zeng
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Wenhao Song
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Uma Gaur
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Mingyao Yang
- Institute of Animal Genetics and Breeding, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
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10
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Xia Q, Zhao Y, Wang J, Qiao W, Zhang D, Yin H, Xu D, Chen F. Proteomic analysis of cell cycle arrest and differentiation induction caused by ATPR, a derivative of all-trans retinoic acid, in human gastric cancer SGC-7901 cells. Proteomics Clin Appl 2017; 11. [PMID: 28164444 DOI: 10.1002/prca.201600099] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 12/31/2016] [Accepted: 02/02/2017] [Indexed: 12/16/2022]
Abstract
PURPOSE 4-amino-2-trifluoromethyl-phenyl retinate (ATPR) was reported to potentially inhibit proliferation and induce differentiation activity in some tumor cells. In this study, a proteomics approach was used to investigate the possible mechanism by screening the differentially expressed protein profiles of SGC-7901 cells before and after ATPR-treatment in vitro. EXPERIMENTAL DESIGN Peptides digested from the total cellular proteins were analyzed by reverse phase LC-MS/MS followed by a label-free quantification analysis. The SEQUEST search engine was used to identify proteins and bioinformatics resources were used to investigate the involved pathways for the differentially expressed proteins. RESULTS Thirteen down-regulated proteins were identified in the ATPR-treated group. Bioinformatics analysis showed that the effects of ATPR on 14-3-3ε might potentially involve the PI3K-AKT-FOXO pathway and P27Kip1 expression. Western blot and RT-PCR analysis showed that ATPR could inhibit AKT phosphorylation, up-regulate the expression of FOXO1A and P27Kip1 at both the protein and mRNA levels, and down-regulate the cytoplasmic expression of cyclin E and CDK2. ATPR-induced G0/G1 phase arrest and differentiation can be ablated if the P27kip1 gene is silenced with sequence-specific siRNA or in 14-3-3ε overexpression of SGC-7901 cells. CONCLUSION AND CLINICAL RELEVANCE ATPR might cause cell cycle arrest and differentiation in SGC-7901 cells by simultaneously inhibiting the phosphorylation of AKT and down-regulating 14-3-3ε. This change would then enhance the inhibition of cyclin E/CDK2 by up-regulating FOXO1A and P27Kip1. Our findings could be of value for finding new drug targets and for developing more effective differentiation inducer.
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Affiliation(s)
- Quan Xia
- School of Pharmacy, Anhui Medical University, Hefei, China
| | - Yingli Zhao
- Department of Pharmacy, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jiali Wang
- School of Pharmacy, Anhui Medical University, Hefei, China
| | - Wenhao Qiao
- School of Pharmacy, Anhui Medical University, Hefei, China
| | - Dongling Zhang
- School of Pharmacy, Anhui Medical University, Hefei, China
| | - Hao Yin
- Chromatography and Mass Spectrometry Lab Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei, China
| | - Dujuan Xu
- Department of Pharmacy, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Feihu Chen
- School of Pharmacy, Anhui Medical University, Hefei, China
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11
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Function of Translationally Controlled Tumor Protein in Organ Growth: Lessons from Drosophila Studies. Results Probl Cell Differ 2017; 64:173-191. [PMID: 29149408 DOI: 10.1007/978-3-319-67591-6_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Regulation of cell growth and proliferation is crucial for development and function of organs in all animals. Genetic defects in growth control can lead to developmental disorders and cancers. Translationally controlled tumor protein (TCTP) is a family of evolutionarily conserved proteins implicated in cancer. Recent studies have revealed multiple roles of TCTP in diverse cellular events, but TCTP functions in vivo are poorly understood in vertebrate systems. We have used Drosophila melanogaster, the fruit fly, as a model organism for genetic dissection of Tctp function. Our studies have shown that Tctp is essential for organ development by regulating growth signaling. Furthermore, it is required for genome stability by promoting DNA repair and chromatin remodeling in the nucleus. Thus, Tctp acts as a multifaceted cytosolic and nuclear factor for regulating organ growth and genome stability. In this chapter, we describe an overview of our findings on Tctp functions in Drosophila and discuss their implications in cancer.
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Xie N, Huang YS, Luo ZF, Xue FG. RNA interference based silencing of YWHAE suppresses proliferation of colon cancer cells. Shijie Huaren Xiaohua Zazhi 2015; 23:4643-4651. [DOI: 10.11569/wcjd.v23.i29.4643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the correlation between YWHAE overexpression and colon cancer proliferation.
METHODS: We conducted immunohistochemical analysis of YWHAE overexpression in 87 colon carcinoma specimens and analyzed its relationship with clinical and pathological parameters. YWHAE expression was then silenced by RNA interference in colon cancer cell line HT-29, and the expression levels of YWHAE protein and mRNA were assayed by Western blot and reverse transcription-PCR, respectively. Cell proliferation was evaluated using the MTT method, and cell cycle and apoptosis were examined by flow cytometry. Colony formation assay was used to determine the growth properties of transfected cells.
RESULTS: YWHAE was highly expressed in colon carcinoma, and negative or low expression was observed in colon mucosal epithelial cells (P < 0.001). The expression intensity of YWHAE was significantly higher in colon cancer with metastasis than in colon cancer without metastasis (P < 0.05). The proliferation and colony formation ability of colon cancer cells were significantly reduced after silencing of YWHAE expression. Additional results showed that reduced YWHAE expression in colon cells led to an increased cell apoptosis rate and cell cycle G1 arrest.
CONCLUSION: YWHAE is overexpressed in colon cancer, which may be related to metastasis in colon carcinoma. Silencing of YWHAE inhibited the proliferation ability of colon cancer cells, which may be associated with cell apoptosis and cell cycle arrest.
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