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Xu F, Zhao X, Zhang J, Shen C. Halofuginone ameliorates the susceptibility to atrial fibrillation by activating the PI3K/Akt signaling pathway. J Mol Histol 2024:10.1007/s10735-024-10270-w. [PMID: 39317829 DOI: 10.1007/s10735-024-10270-w] [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: 09/07/2023] [Accepted: 09/10/2024] [Indexed: 09/26/2024]
Abstract
Atrial fibrillation (AF) is the most common cardiac arrhythmia in clinical practice. Halofuginone (HF) exerts beneficial effects on organ fibrosis, periodontitis, and cancer. However, the effect of HF against AF remains unknown. During the induction of AF, the rats were intragastrically administered HF (5 mg/kg and 10 mg/kg) daily for 7 consecutive days. Cardiac function was evaluated through echocardiographic analysis. The presence of pathological changes and interstitial fibrosis in the left atrial tissues were investigated. Intracellular Ca2+ homeostasis and mitochondrial function in atrial tissues were evaluated. The activation of the PI3K/Akt signaling pathway was examined, and an allosteric Akt inhibitor, MK-2206, was applied to confirm the involvement of the PI3K/Akt signaling pathway in the protection against AF by HF. The administration of HF resulted in a prolongation of the atrial effective refractory period (AERP), a reduction in both the duration and inducibility of AF, and a decrease in atrial weight, heart weight, atrial weight/body weight ratio, and heart weight/body weight ratio in rats with AF. In addition, the administration of HF resulted in a reduction in left atrial diameter (LAD) and an increase in left ventricular internal diameter diastolic (LVIDd), ejection fraction (EF), and fractional shortening (FS), while having no effect on left ventricular internal diameter systolic (LVIDs). The pathological changes and cardiac fibrosis observed in rats with AF were mitigated by HF. Moreover, HF enhanced mitochondrial function, suppressed cardiomyocyte apoptosis, and activated the PI3K/Akt pathway in AF rats. Furthermore, the protective effect against AF was also observed in an in vitro model. The effects of HF on fibrosis markers, intracellular Ca2+ homeostasis, mitochondrial function, and cardiac apoptosis were blocked by MK-2206. HF alleviated the susceptibility to AF in vivo and in vitro via the activation of the PI3K/Akt signaling pathway.
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Affiliation(s)
- Feng Xu
- Dalian Medical University, Dalian, 116044, China
| | | | - Jing Zhang
- Medical Department, The Second Hospital of Dalian Medical University, Dalian, 116022, China
| | - Chunjian Shen
- Department of Cardiothoracic Surgery, The Fourth People's Hospital of Shenyang, No. 20 Huanghe South Street, Shenyang, Liaoning Province, 110000, China.
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2
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Wu X, Sun Q, Li X, Jiang L, Chen L. Halofuginone Inhibits Osteoclastogenesis and Enhances Osteoblastogenesis by Regulating Th17/Treg Cell Balance in Multiple Myeloma Mice with Bone Lesions. Indian J Hematol Blood Transfus 2024; 40:407-414. [PMID: 39011260 PMCID: PMC11246324 DOI: 10.1007/s12288-024-01756-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 03/15/2024] [Indexed: 07/17/2024] Open
Abstract
Evidences shows that T helper 17 (Th17) and regulatory T (Treg) cells imbalance plays a critical role in bone lesions of MM patients. Therefore, regulating the Th17/Treg imbalance may be beneficial for bone lesions in MM. Ten MM mice complicated with bone lesions were established and divided into the halofuginone (HF) group and the PBS group. After treatment, tibia and fibula from both groups were scanned by micro-CT. Osteoclasts and osteoblasts were validated by histochemical staining and ELISA. Th17 and Treg cells were tested by flow cytometry. The correlations between Th17/Treg cell ratio and osteoclasts, osteoblasts and bone remodeling were analyzed using the Spearman relative analysis. After treatment, mice in the HF group had an increase in trabecular bone volume fraction and thickened cortex, but a decrease in trabecular separation compared to mice in the PBS group.Tartrate-resistant acid phosphase (TRAP) + osteoclasts and its biomarker TRACP5b in serum were reduced, while alkaline phosphatase (ALP) + osteoblasts and its biomarker N-terminal propeptide of type 1precollagen (P1NP) in serum were accreted in the HF group. Th17/Treg cell ratio in halofuginone-treated mice was 0.85 ± 0.05, and was significantly lower than that in PBS-treated mice, which was 1.51 ± 0.03. In addition, it showed that the Th17/Treg cell ratio was significantly and positively associated with osteoclasts, but was significantly and negatively associated with osteoblasts and bone remodeling. Halofuginone plays a critical role in the amelioration bone lesions in MM, as it can inhibit osteoclastogenesis and enhance osteoblastogenesis by regulating the Th17/Treg cell balance. Supplementary Information The online version contains supplementary material available at 10.1007/s12288-024-01756-4.
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Affiliation(s)
- Xiaofei Wu
- Department of Hematology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430014 China
| | - Qiong Sun
- Department of Hematology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430014 China
| | - Xiang Li
- Department of Hematology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430014 China
| | - Lin Jiang
- Department of Hematology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430014 China
| | - Li Chen
- Department of Hematology, The Central Hospital of Wuhan, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430014 China
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3
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Kurata K, James-Bott A, Tye MA, Yamamoto L, Samur MK, Tai YT, Dunford J, Johansson C, Senbabaoglu F, Philpott M, Palmer C, Ramasamy K, Gooding S, Smilova M, Gaeta G, Guo M, Christianson JC, Payne NC, Singh K, Karagoz K, Stokes ME, Ortiz M, Hagner P, Thakurta A, Cribbs A, Mazitschek R, Hideshima T, Anderson KC, Oppermann U. Prolyl-tRNA synthetase as a novel therapeutic target in multiple myeloma. Blood Cancer J 2023; 13:12. [PMID: 36631435 PMCID: PMC9834298 DOI: 10.1038/s41408-023-00787-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/23/2022] [Accepted: 01/05/2023] [Indexed: 01/13/2023] Open
Abstract
Multiple myeloma (MM) is a plasma cell malignancy characterised by aberrant production of immunoglobulins requiring survival mechanisms to adapt to proteotoxic stress. We here show that glutamyl-prolyl-tRNA synthetase (GluProRS) inhibition constitutes a novel therapeutic target. Genomic data suggest that GluProRS promotes disease progression and is associated with poor prognosis, while downregulation in MM cells triggers apoptosis. We developed NCP26, a novel ATP-competitive ProRS inhibitor that demonstrates significant anti-tumour activity in multiple in vitro and in vivo systems and overcomes metabolic adaptation observed with other inhibitor chemotypes. We demonstrate a complex phenotypic response involving protein quality control mechanisms that centers around the ribosome as an integrating hub. Using systems approaches, we identified multiple downregulated proline-rich motif-containing proteins as downstream effectors. These include CD138, transcription factors such as MYC, and transcription factor 3 (TCF3), which we establish as a novel determinant in MM pathobiology through functional and genomic validation. Our preclinical data therefore provide evidence that blockade of prolyl-aminoacylation evokes a complex pro-apoptotic response beyond the canonical integrated stress response and establish a framework for its evaluation in a clinical setting.
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Affiliation(s)
- Keiji Kurata
- grid.38142.3c000000041936754XJerome Lipper Multiple Myeloma Center, LeBow Institute for Myeloma Therapeutics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215 USA
| | - Anna James-Bott
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Mark A. Tye
- grid.32224.350000 0004 0386 9924Center for Systems Biology, Massachusetts General Hospital, Boston, MA 02114 USA ,Harvard Graduate School of Arts and Sciences, Cambridge, MA 02138 USA ,grid.38142.3c000000041936754XHarvard T.H. Chan School of Public Health, Boston, MA 02115 USA
| | - Leona Yamamoto
- grid.38142.3c000000041936754XJerome Lipper Multiple Myeloma Center, LeBow Institute for Myeloma Therapeutics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215 USA
| | - Mehmet K. Samur
- grid.38142.3c000000041936754XJerome Lipper Multiple Myeloma Center, LeBow Institute for Myeloma Therapeutics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215 USA ,grid.38142.3c000000041936754XDepartment of Biostatistics, Harvard T. H. Chan School of Public Health, Boston, MA 02115 USA ,grid.65499.370000 0001 2106 9910Department of Data Science, Dana-Farber Cancer Institute, Boston, MA 02215 USA
| | - Yu-Tzu Tai
- grid.38142.3c000000041936754XJerome Lipper Multiple Myeloma Center, LeBow Institute for Myeloma Therapeutics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215 USA
| | - James Dunford
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Catrine Johansson
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Filiz Senbabaoglu
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Martin Philpott
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Charlotte Palmer
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Karthik Ramasamy
- grid.4991.50000 0004 1936 8948Oxford Centre for Translational Myeloma Research, Botnar Research Centre, University of Oxford, Oxford, OX3 7LD UK ,grid.4991.50000 0004 1936 8948Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 7LD UK
| | - Sarah Gooding
- grid.4991.50000 0004 1936 8948Oxford Centre for Translational Myeloma Research, Botnar Research Centre, University of Oxford, Oxford, OX3 7LD UK ,grid.421962.a0000 0004 0641 4431Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 7LD UK
| | - Mihaela Smilova
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Giorgia Gaeta
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - Manman Guo
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK
| | - John C. Christianson
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK ,grid.4991.50000 0004 1936 8948Oxford Centre for Translational Myeloma Research, Botnar Research Centre, University of Oxford, Oxford, OX3 7LD UK
| | - N. Connor Payne
- grid.32224.350000 0004 0386 9924Center for Systems Biology, Massachusetts General Hospital, Boston, MA 02114 USA ,grid.38142.3c000000041936754XDepartment of Chemistry & Chemical Biology, Harvard University, Cambridge, MA 02138 USA
| | - Kritika Singh
- grid.32224.350000 0004 0386 9924Center for Systems Biology, Massachusetts General Hospital, Boston, MA 02114 USA ,grid.261112.70000 0001 2173 3359Department of Bioengineering, Northeastern University, Boston, MA 02115 USA
| | - Kubra Karagoz
- grid.419971.30000 0004 0374 8313Bristol Myers Squibb, Summit, NJ 07901 USA
| | - Matthew E. Stokes
- grid.419971.30000 0004 0374 8313Bristol Myers Squibb, Summit, NJ 07901 USA
| | - Maria Ortiz
- grid.419971.30000 0004 0374 8313Bristol Myers Squibb, Summit, NJ 07901 USA
| | - Patrick Hagner
- grid.419971.30000 0004 0374 8313Bristol Myers Squibb, Summit, NJ 07901 USA
| | - Anjan Thakurta
- grid.4991.50000 0004 1936 8948Oxford Centre for Translational Myeloma Research, Botnar Research Centre, University of Oxford, Oxford, OX3 7LD UK ,grid.419971.30000 0004 0374 8313Bristol Myers Squibb, Summit, NJ 07901 USA
| | - Adam Cribbs
- grid.4991.50000 0004 1936 8948Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD UK ,grid.4991.50000 0004 1936 8948Oxford Centre for Translational Myeloma Research, Botnar Research Centre, University of Oxford, Oxford, OX3 7LD UK
| | - Ralph Mazitschek
- grid.32224.350000 0004 0386 9924Center for Systems Biology, Massachusetts General Hospital, Boston, MA 02114 USA ,grid.38142.3c000000041936754XHarvard T.H. Chan School of Public Health, Boston, MA 02115 USA ,grid.66859.340000 0004 0546 1623Broad Institute of MIT and Harvard, Cambridge, MA 02142 USA
| | - Teru Hideshima
- Jerome Lipper Multiple Myeloma Center, LeBow Institute for Myeloma Therapeutics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, 02215, USA.
| | - Kenneth C. Anderson
- grid.38142.3c000000041936754XJerome Lipper Multiple Myeloma Center, LeBow Institute for Myeloma Therapeutics, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215 USA
| | - Udo Oppermann
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD, UK. .,Oxford Centre for Translational Myeloma Research, Botnar Research Centre, University of Oxford, Oxford, OX3 7LD, UK.
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4
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Nwosu GO, Powell JA, Pitson SM. Targeting the integrated stress response in hematologic malignancies. Exp Hematol Oncol 2022; 11:94. [DOI: 10.1186/s40164-022-00348-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/22/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractWhile numerous targeted therapies have been recently adopted to improve the treatment of hematologic malignancies, acquired or intrinsic resistance poses a significant obstacle to their efficacy. Thus, there is increasing need to identify novel, targetable pathways to further improve therapy for these diseases. The integrated stress response is a signaling pathway activated in cancer cells in response to both dysregulated growth and metabolism, and also following exposure to many therapies that appears one such targetable pathway for improved treatment of these diseases. In this review, we discuss the role of the integrated stress response in the biology of hematologic malignancies, its critical involvement in the mechanism of action of targeted therapies, and as a target for pharmacologic modulation as a novel strategy for the treatment of hematologic malignancies.
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5
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Mi L, Zhang Y, Su A, Tang M, Xing Z, He T, Wu W, Li Z. Halofuginone for cancer treatment: A systematic review of efficacy and molecular mechanisms. J Funct Foods 2022. [DOI: 10.1016/j.jff.2022.105237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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6
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K Zaidan R, Evans P. Stereoselective synthesis of analogues of deoxyfebrifugine. JOURNAL OF CHEMICAL RESEARCH 2022. [DOI: 10.1177/17475198211047209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The preparation of six new optically active analogues of the natural product febrifugine (1) is reported. These analogues, lacking the hydroxy group from the natural product, were prepared from optically active N-protected S-pelletierine (7) and differ in terms of the specific quinazolinone portion included. The required S-7 (80% enantiomeric excess) was prepared from an asymmetric Mannich reaction between piperideine (8) and acetone in the presence of l-proline. The differently substituted quinazolinone used in this study (10a–10g) was either commercially available or was prepared from the corresponding substituted anthranilic acid and were installed via a bromination–alkylation sequence. N-Deprotection of the subsequent adducts (12a–12g) gave target compounds 13a–13f and completed the synthetic sequence.
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Affiliation(s)
- Raed K Zaidan
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Dublin, Ireland
- Department of Chemistry, College of Science, University of Basra, Basra, Iraq
| | - Paul Evans
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Dublin, Ireland
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7
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Chen Y, Hu S, Shu Y, Qi Z, Zhang B, Kuang Y, Ma J, Cheng P. Antifibrotic Therapy Augments the Antitumor Effects of Vesicular Stomatitis Virus Via Reprogramming Tumor Microenvironment. Hum Gene Ther 2021; 33:237-249. [PMID: 34405694 DOI: 10.1089/hum.2021.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Solid tumors are characterized by abundant extracellular matrix originating from cancer-associated fibroblasts (CAFs). High collagen content can trigger the collapse of vascular system in the tumor and form physical barrier that eventually impedes the penetration of drug particles and cytotoxic immune cells. Moreover, CAFs is able to promote the enrichment of tumor-associated macrophages (TAMs) and differentiation of myeloid-derived suppressor cells (MDSCs) that work in concert to develop a highly immunosuppressive tumor microenvironment (TME). In this study, we investigated if halofuginone, an antifibrotic drug, can augment the therapeutic effects of oncolytic vesicular stomatitis virus (VSV). The results revealed that halofuginone significantly disrupts the collagen network in tumors and promotes the distribution of VSV and infiltration of CD8+ T cells (p < 0.0001). Combined treatment of VSV and halofuginone also modulates the immunosuppressive TME via deletion of TAM, MDSCs, and regulatory T cells (Tregs). Collectively, the combination therapy remarkably inhibits the tumor growth in multiple murine models and prolongs survival of mice. The results demonstrate the clinical potential of halofuginone in combination with oncolytic virus.
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Affiliation(s)
- Yanwei Chen
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Shichuan Hu
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Yongheng Shu
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Zhongbing Qi
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Bin Zhang
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Yueting Kuang
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Jinhu Ma
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Ping Cheng
- State Key Laboratory of Biotherapy and Cancer Center/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
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8
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Pang L, Weeks SD, Juhás M, Strelkov SV, Zitko J, Van Aerschot A. Towards Novel 3-Aminopyrazinamide-Based Prolyl-tRNA Synthetase Inhibitors: In Silico Modelling, Thermal Shift Assay and Structural Studies. Int J Mol Sci 2021; 22:ijms22157793. [PMID: 34360555 PMCID: PMC8346053 DOI: 10.3390/ijms22157793] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/08/2021] [Accepted: 07/17/2021] [Indexed: 11/16/2022] Open
Abstract
Human cytosolic prolyl-tRNA synthetase (HcProRS) catalyses the formation of the prolyl-tRNAPro, playing an important role in protein synthesis. Inhibition of HcProRS activity has been shown to have potential benefits in the treatment of fibrosis, autoimmune diseases and cancer. Recently, potent pyrazinamide-based inhibitors were identified by a high-throughput screening (HTS) method, but no further elaboration was reported. The pyrazinamide core is a bioactive fragment found in numerous clinically validated drugs and has been subjected to various modifications. Therefore, we applied a virtual screening protocol to our in-house library of pyrazinamide-containing small molecules, searching for potential novel HcProRS inhibitors. We identified a series of 3-benzylaminopyrazine-2-carboxamide derivatives as positive hits. Five of them were confirmed by a thermal shift assay (TSA) with the best compounds 3b and 3c showing EC50 values of 3.77 and 7.34 µM, respectively, in the presence of 1 mM of proline (Pro) and 3.45 µM enzyme concentration. Co-crystal structures of HcProRS in complex with these compounds and Pro confirmed the initial docking studies and show how the Pro facilitates binding of the ligands that compete with ATP substrate. Modelling 3b into other human class II aminoacyl-tRNA synthetases (aaRSs) indicated that the subtle differences in the ATP binding site of these enzymes likely contribute to its potential selective binding of HcProRS. Taken together, this study successfully identified novel HcProRS binders from our anti-tuberculosis in-house compound library, displaying opportunities for repurposing old drug candidates for new applications such as therapeutics in HcProRS-related diseases.
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Affiliation(s)
- Luping Pang
- Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Herestraat 49—Box 822, 3000 Leuven, Belgium; (L.P.); (S.D.W.); (S.V.S.)
- Medicinal Chemistry, Rega Institute for Medical Research, KU Leuven, Herestraat 49—Box 1041, 3000 Leuven, Belgium
| | - Stephen D. Weeks
- Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Herestraat 49—Box 822, 3000 Leuven, Belgium; (L.P.); (S.D.W.); (S.V.S.)
- Pledge Therapeutics, Gaston Geenslaan 1, 3001 Leuven, Belgium
| | - Martin Juhás
- Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05 Hradec Králové, Czech Republic;
| | - Sergei V. Strelkov
- Biocrystallography, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Herestraat 49—Box 822, 3000 Leuven, Belgium; (L.P.); (S.D.W.); (S.V.S.)
| | - Jan Zitko
- Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05 Hradec Králové, Czech Republic;
- Correspondence: (J.Z.); (A.V.A.)
| | - Arthur Van Aerschot
- Medicinal Chemistry, Rega Institute for Medical Research, KU Leuven, Herestraat 49—Box 1041, 3000 Leuven, Belgium
- Correspondence: (J.Z.); (A.V.A.)
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9
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Zuo R, Zhang J, Song X, Hu S, Gao X, Wang J, Ji H, Ji C, Peng L, Si H, Li G, Fang K, Zhang J, Jiang S, Guo D. Encapsulating Halofuginone Hydrobromide in TPGS Polymeric Micelles Enhances Efficacy Against Triple-Negative Breast Cancer Cells. Int J Nanomedicine 2021; 16:1587-1600. [PMID: 33664573 PMCID: PMC7924253 DOI: 10.2147/ijn.s289096] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 02/04/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Halofuginone hydrobromide (HF) is a synthetic analogue of the naturally occurring quinazolinone alkaloid febrifugine, which has potential therapeutic effects against breast cancer, however, its poor water solubility greatly limits its pharmaceutical application. D-α-tocopherol polyethylene glycol 1000 succinate (TPGS) is a water-soluble derivative of vitamin E, which can self-assemble to form polymeric micelles (PMs) for encapsulating insoluble anti-tumor drugs, thereby effectively enhancing their anti-cancer effects. METHODS HF-loaded TPGS PMs (HTPMs) were manufactured using a thin-film hydration technique, followed by a series of characterizations, including the hydrodynamic diameter (HD), zeta potential (ZP), stability, drug loading (DL), encapsulation efficiency (EE), and in vitro drug release. The anti-cancer effects and potential mechanism of HTPMs were investigated in the breast cell lines MDA-MB-231 and MCF-7, and normal breast epithelial cell line Eph-ev. The breast cancer-bearing BALB/c nude mouse model was successfully established by subcutaneous injection of MDA-MB-231 cells and used to evaluate the in vivo therapeutic effect and safety of the HTPMs. RESULTS The optimized HTPMs had an HD of 17.8±0.5 nm and ZP of 14.40±0.1 mV. These PMs exhibited DL of 12.94 ± 0.46% and EE of 90.6 ± 0.85%, along with excellent storage stability, dilution tolerance and sustained drug release in pH-dependent manner within 24 h compared to free HF. Additionally, the HTPMs had stronger inhibitory effects than free HF and paclitaxel against MDA-MB-231 triple-negative breast cancer cells, and little toxicity in normal breast epithelial Eph-ev cells. The HTPMs induced cell cycle arrest and apoptosis of MDA-MB-231 by disrupting the mitochondrial membrane potential and enhancing reactive oxygen species formation. Evaluation of in vivo anti-tumor efficacy demonstrated that HTPMs exerted a stronger tumor inhibition rate (68.17%) than free HF, and exhibited excellent biocompatibility. CONCLUSION The findings from this study indicate that HTPMs holds great clinical potential for treating triple-negative breast cancer.
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Affiliation(s)
- Runan Zuo
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Jingjing Zhang
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Xinhao Song
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Shiheng Hu
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Xiuge Gao
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Junqi Wang
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Hui Ji
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Chunlei Ji
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Lin Peng
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Hongbin Si
- College of Animal Science and Technology, Guangxi University, Nanning, 530004, People’s Republic of China
| | - Gonghe Li
- College of Animal Science and Technology, Guangxi University, Nanning, 530004, People’s Republic of China
| | - Kun Fang
- Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, 230001, People’s Republic of China
| | - Junren Zhang
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Shanxiang Jiang
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
| | - Dawei Guo
- Center for Veterinary Drug Research and Evaluation, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China
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10
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Wang C, Zhu JB, Yan YY, Zhang W, Gong XJ, Wang X, Wang XL. Halofuginone inhibits tumorigenic progression of 5-FU-resistant human colorectal cancer HCT-15/FU cells by targeting miR-132-3p in vitro. Oncol Lett 2020; 20:385. [PMID: 33154782 PMCID: PMC7607966 DOI: 10.3892/ol.2020.12248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 09/11/2020] [Indexed: 02/06/2023] Open
Abstract
5-Fluorouracil (5-FU)-based chemotherapy is the first-line option for patients with advanced colorectal cancer (CRC). However, the development of chemoresistance is the primary cause of treatment failure. Halofuginone (HF), a small molecule alkaloid derived from febrifugine, has been demonstrated to exert strong anti-proliferative effects. However, to the best of our knowledge, whether HF inhibits the progression of 5-FU-resistant human CRC HCT-15/FU cells, and the underlying mechanisms, remain unknown. In the present study, the effects of HF on HCT-15/FU cells were assessed in vitro. The results revealed that HF inhibited HCT-15/FU cell viability as demonstrated by the MTT and colony formation assays. Following treatment of HCT-15/FU cells with HF, the migratory and invasive capacities of the cells were significantly decreased. MicroRNA (miRNA/miR)-sequencing data, subsequent miRNA trend analysis and reverse transcription-quantitative PCR all demonstrated that miR-132-3p expression was increased following treatment with HF in a dose-dependent manner. Western blot analysis indicated that following treatment with HF, the expression levels of proteins associated with proliferation, invasion and metastasis in cells were markedly downregulated. These results suggested that HF inhibited the proliferation, invasion and migration of HCT-15/FU cells by upregulating the expression levels of miR-132-3p. Therefore, miR-132-3p may serve as a molecular marker, which may be used to predict CRC resistance to 5-FU, and HF may serve as a novel clinical treatment for 5-FU-resistant CRC.
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Affiliation(s)
- Chen Wang
- Department of Gastroenterology, Wuhai Municipal People's Hospital, Wuhai, Inner Mongolia Autonomous Region 016000, P.R. China
| | - Jian-Bin Zhu
- Department of Gastroenterology, Wuhai Municipal People's Hospital, Wuhai, Inner Mongolia Autonomous Region 016000, P.R. China
| | - Yan-Yan Yan
- Department of Pharmacology, Institute of Immunology and School of Medicine, Shanxi Datong University, Datong, Shanxi 037009, P.R. China
| | - Wei Zhang
- Department of Gastroenterology, Cancer Center of Datong, The Second People's Hospital of Datong, Datong, Shanxi 037005, P.R. China
| | - Xiao-Jie Gong
- Department of Gastroenterology, Wuhai Municipal People's Hospital, Wuhai, Inner Mongolia Autonomous Region 016000, P.R. China
| | - Xia Wang
- Department of Gastroenterology, Wuhai Municipal People's Hospital, Wuhai, Inner Mongolia Autonomous Region 016000, P.R. China
| | - Xiao-Liang Wang
- General Surgery Center, Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University, Shanghai 201700, P.R. China
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11
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Significance of halofuginone in esophageal squamous carcinoma cell apoptosis through HIF-1α-FOXO3a pathway. Life Sci 2020; 257:118104. [PMID: 32679143 DOI: 10.1016/j.lfs.2020.118104] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 07/07/2020] [Accepted: 07/12/2020] [Indexed: 12/19/2022]
Abstract
Halofuginone (HF) from Dichroa febrifuga has shown therapeutic potential in hepatocellular, lung and colorectal cancer cell models. Evidence has also indicated that HF plays roles in caustic induced esophageal strictures and oxidative injury. However, the role of HF in esophageal squamous carcinoma (ESCC) remains unclear. In this study, we investigated HF actions and mechanisms during ESCC cell apoptosis. We observed different HF concentrations (5, 10 and 20 nM) inhibited ESCC cell survival in a time and dose-dependent manner. HF treatment markedly induced KYSE-30 and TE-1 cell apoptosis, and caspase-3 activity. Apoptosis related protein Bax expression was dramatically increased, whereas Bcl-2 levels were reduced in KYSE-30 and TE-1 cells, after HF exposure. Also, we showed that HF treatment induced DNA damage by promoting γH2AX, pATM and pATR expression. HF treatment also reduced hypoxia-inducible factor-1α (HIF-1α) and forkhead box class O 3a (FOXO3a) expression in KYSE-30 and TE-1 cells. We also showed that HF inhibited FOXO3a expression, but this was dependent on HIF-1α inhibition. Finally, FOXO3a overexpression reversed HF induced cell survival inhibition, cell apoptosis and DNA damage. FOXO3a knockdown enhanced the effects of HF on cell survival, cell apoptosis and DNA damage. In summary, HF plays inhibitory roles in ESCC cell apoptosis, via HIF-1α-FOXO3a-dependent signaling. These data support the notion that HF could act as an effective therapeutic reagent towards ESCC.
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12
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Demiroglu-Zergeroglu A, Turhal G, Topal H, Ceylan H, Donbaloglu F, Karadeniz Cerit K, Odongo RR. Anticarcinogenic effects of halofuginone on lung-derived cancer cells. Cell Biol Int 2020; 44:1934-1944. [PMID: 32437065 DOI: 10.1002/cbin.11399] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 05/04/2020] [Accepted: 05/18/2020] [Indexed: 02/06/2023]
Abstract
Malignant mesothelioma is a rare but aggressive form of malignancy, which is difficult to diagnose and is resistant to current chemotherapeutic treatment options. Molecular techniques have been used to investigate the mechanisms of action and the beneficial therapeutic effects of halofuginone (HF) in several cancers but not malignant mesotheliomas. In this study, the antiproliferative and apoptotic effects of HF were investigated through its ability to deregulate EGFR downstream signalling cascade proteins in the pathologically aggressive malignant mesothelioma and non-small-cell lung cancer cells. We showed that administration of HF at nanomolar concentrations induced a dose-dependent reduction in the viability of cancer cells, made cell cycle arrest, inhibited proliferation of cancer cells via STAT3 and ERK1/2 pathways and triggered the apoptotic cascade via p38MAPK. We demonstrated that the apoptotic cell death mechanism was mediated by enhanced activation of caspase-3 and concomitant PARP cleavage, downregulation of Bcl-2 and upregulation of Bax in both malignant mesothelioma and lung cancer cells. In particular, we demonstrated that cancer cells were more sensitive to HF treatment than normal mesothelial cells. Taken together, this study suggests that HF exerts its anticancer effects in lung-derived cancers by targeting signal transduction pathways mainly through deregulation of ERK1/2, STAT3 and p38MAPK to reduce cancer cell viability, induce cell cycle arrest and apoptotic cell death. Thus, HF might be considered as a potential agent against malignant mesothelioma and/or lung cancer cells.
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Affiliation(s)
- Asuman Demiroglu-Zergeroglu
- Department of Molecular Biology & Genetics, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
| | - Gulseren Turhal
- Department of Molecular Biology & Genetics, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
| | - Halime Topal
- Department of Molecular Biology & Genetics, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
| | - Hurmuz Ceylan
- Department of Molecular Biology & Genetics, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
| | - Fadime Donbaloglu
- Department of Molecular Biology & Genetics, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
| | - Kivilcim Karadeniz Cerit
- Department of Pediatric Surgery, School of Medicine, Marmara University, Pendik, Istanbul, Turkey
| | - Ronald R Odongo
- Department of Molecular Biology & Genetics, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
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13
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D'Aniello C, Patriarca EJ, Phang JM, Minchiotti G. Proline Metabolism in Tumor Growth and Metastatic Progression. Front Oncol 2020; 10:776. [PMID: 32500033 PMCID: PMC7243120 DOI: 10.3389/fonc.2020.00776] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 04/21/2020] [Indexed: 12/15/2022] Open
Abstract
Cancer cells show a formidable capacity to survive under stringent conditions, to elude mechanisms of control, such as apoptosis, and to resist therapy. Cancer cells reprogram their metabolism to support uncontrolled proliferation and metastatic progression. Phenotypic and functional heterogeneity are hallmarks of cancer cells, which endow them with aggressiveness, metastatic capacity, and resistance to therapy. This heterogeneity is regulated by a variety of intrinsic and extrinsic stimuli including those from the tumor microenvironment. Increasing evidence points to a key role for the metabolism of non-essential amino acids in this complex scenario. Here we discuss the impact of proline metabolism in cancer development and progression, with particular emphasis on the enzymes involved in proline synthesis and catabolism, which are linked to pathways of energy, redox, and anaplerosis. In particular, we emphasize how proline availability influences collagen synthesis and maturation and the acquisition of cancer cell plasticity and heterogeneity. Specifically, we propose a model whereby proline availability generates a cycle based on collagen synthesis and degradation, which, in turn, influences the epigenetic landscape and tumor heterogeneity. Therapeutic strategies targeting this metabolic-epigenetic axis hold great promise for the treatment of metastatic cancers.
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Affiliation(s)
- Cristina D'Aniello
- Stem Cell Fate Laboratory, Institute of Genetics and Biophysics “Adriano Buzzati-Traverso”, CNR, Naples, Italy
| | - Eduardo J. Patriarca
- Stem Cell Fate Laboratory, Institute of Genetics and Biophysics “Adriano Buzzati-Traverso”, CNR, Naples, Italy
| | - James M. Phang
- Mouse Cancer Genetics Program, Center for Cancer Research, National Cancer Institute at Frederick, NIH, Frederick, MD, United States
| | - Gabriella Minchiotti
- Stem Cell Fate Laboratory, Institute of Genetics and Biophysics “Adriano Buzzati-Traverso”, CNR, Naples, Italy
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14
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Xia X, Wang X, Zhang S, Zheng Y, Wang L, Xu Y, Hang B, Sun Y, Lei L, Bai Y, Hu J. miR-31 shuttled by halofuginone-induced exosomes suppresses MFC-7 cell proliferation by modulating the HDAC2/cell cycle signaling axis. J Cell Physiol 2019; 234:18970-18984. [PMID: 30916359 DOI: 10.1002/jcp.28537] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 02/24/2019] [Accepted: 03/05/2019] [Indexed: 12/12/2022]
Abstract
Traditional Chinese medicine (TCM) are both historically important therapeutic agents and important source of new drugs. Halofuginone (HF), a small molecule alkaloid derived from febrifugine, has been shown to exert strong antiproliferative effects that differ markedly among various cell lines. However, whether HF inhibits MCF-7 cell growth in vitro and underlying mechanisms of this process are not yet clear. Here, we offer the strong evidence of the connection between HF treatment, exosome production and proliferation of MCF-7 cells. Our results showed that HF inhibits MCF-7 cell growth in both time- and dose-dependent manner. Further microRNA (miRNA) profiles analysis in HF treated and nontreated MCF-7 cell and exosomes observed that six miRNAs are particularly abundant and sorted in exosomes. miRNAs knockdown experiment in exosomes and the MCF-7 growth inhibition assay showed that exosomal microRNA-31 (miR-31) modulates MCF-7 cells growth by specially targeting the histone deacetylase 2 (HDAC2), which increases the levels of cyclin-dependent kinases 2 (CDK2) and cyclin D1 and suppresses the expression of p21. In conclusion, these data indicate that inhibition of exosome production reduces exosomal miR-31, which targets the HDAC2 and further regulates the level of cell cycle regulatory proteins, contributing to the anticancer functions of HF. Our data suggest a new role for HF and the exosome production in tumorigenesis and may provide novel insights into prevention and treatment of breast cancer.
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Affiliation(s)
- Xiaojing Xia
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China
| | - Xin Wang
- College of Agriculture and Forestry Science, Linyi University, Linyi, China
| | - Shouping Zhang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China
| | - Yi Zheng
- College of Basic Medical Sciences, Shandong University, Ji'nan, China
| | - Lei Wang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China
| | - Yanzhao Xu
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China
| | - Bolin Hang
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China
| | - Yawei Sun
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China
| | - Liancheng Lei
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - YueYu Bai
- Animal Health Supervision of Henan Province, Bureau of Animal Husbandry of Henan province, Zhengzhou, China
| | - Jianhe Hu
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, China
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15
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Chen G, Gong R, Shi X, Yang D, Zhang G, Lu A, Yue J, Bian Z. Halofuginone and artemisinin synergistically arrest cancer cells at the G1/G0 phase by upregulating p21Cip1 and p27Kip1. Oncotarget 2018; 7:50302-50314. [PMID: 27385212 PMCID: PMC5226584 DOI: 10.18632/oncotarget.10367] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 06/09/2016] [Indexed: 01/02/2023] Open
Abstract
Combinational drug therapy is one of the most promising strategies in modern anticancer research. Traditional Chinese medicine (TCM) formulas represent a wealth of complex combinations proven successful over centuries of clinical application. One such formula used to treat a variety of diseases, including cancer, contains two herbs, whose main active components are Halofuginone (HF) and Artemisinin (ATS). Here we studied the anticancer synergism of HF and ATS in various cancer cell lines and in a xenograft nude mice model. We found that the HF-ATS combination arrested more cells at the G1/G0 phase than either one alone, with the concomitant increased levels of CDK2 inhibitors, p21Cip1 and p27Kip1. By knocking down p21Cip1 and p27Kip1 separately or simultaneously in HCT116 cells and MCF-7 cells, we found that p21Cip1 was required for HF induced G1/G0 arrest, whereas p21Cip1 and p27Kip1 were both required for ATS or HF-ATS combination-mediated cell cycle arrest. Moreover, HF-ATS combination synergistically inhibited tumor growth in xenograft nude mice, and this was associated with the increased levels of p21Cip1 and p27Kip1. Collectively, these data indicate that the upregulation of p21Cip1 and p27Kip1 contributes to the synergistic anticancer effect of the HF-ATS combination.
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Affiliation(s)
- Guoqing Chen
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.,Chongqing Academy of Chinese Materia Medica, Chongqing, China
| | - Ruihong Gong
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Xianli Shi
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Dajian Yang
- Chongqing Academy of Chinese Materia Medica, Chongqing, China
| | - Ge Zhang
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Aiping Lu
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Jianbo Yue
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Zhaoxiang Bian
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
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16
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Discovery of a novel prolyl-tRNA synthetase inhibitor and elucidation of its binding mode to the ATP site in complex with l-proline. Biochem Biophys Res Commun 2017; 488:393-399. [PMID: 28501621 DOI: 10.1016/j.bbrc.2017.05.064] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 05/10/2017] [Indexed: 11/23/2022]
Abstract
Prolyl-tRNA synthetase (PRS) is a member of the aminoacyl-tRNA synthetase family of enzymes and catalyzes the synthesis of prolyl-tRNAPro using ATP, l-proline, and tRNAPro as substrates. An ATP-dependent PRS inhibitor, halofuginone, was shown to suppress autoimmune responses, suggesting that the inhibition of PRS is a potential therapeutic approach for inflammatory diseases. Although a few PRS inhibitors have been derivatized from natural sources or substrate mimetics, small-molecule human PRS inhibitors have not been reported. In this study, we discovered a novel series of pyrazinamide PRS inhibitors from a compound library using pre-transfer editing activity of human PRS enzyme. Steady-state biochemical analysis on the inhibitory mode revealed its distinctive characteristics of inhibition with proline uncompetition and ATP competition. The binding activity of a representative compound was time-dependently potentiated by the presence of l-proline with Kd of 0.76 nM. Thermal shift assays demonstrated the stabilization of PRS in complex with l-proline and pyrazinamide PRS inhibitors. The binding mode of the PRS inhibitor to the ATP site of PRS enzyme was elucidated using the ternary complex crystal structure with l-proline. The results demonstrated the different inhibitory and binding mode of pyrazinamide PRS inhibitors from preceding halofuginone. Furthermore, the PRS inhibitor inhibited intracellular protein synthesis via a different mode than halofuginone. In conclusion, we have identified a novel drug-like PRS inhibitor with a distinctive binding mode. This inhibitor was effective in a cellular context. Thus, the series of PRS inhibitors are considered to be applicable to further development with differentiation from preceding halofuginone.
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17
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Temporomandibular joint involvement in patients with multiple myeloma—a retrospective study. Int J Oral Maxillofac Surg 2016; 45:1545-1550. [DOI: 10.1016/j.ijom.2016.06.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 03/22/2016] [Accepted: 06/22/2016] [Indexed: 12/11/2022]
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18
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Lamora A, Mullard M, Amiaud J, Brion R, Heymann D, Redini F, Verrecchia F. Anticancer activity of halofuginone in a preclinical model of osteosarcoma: inhibition of tumor growth and lung metastases. Oncotarget 2016; 6:14413-27. [PMID: 26015407 PMCID: PMC4546476 DOI: 10.18632/oncotarget.3891] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 04/24/2015] [Indexed: 12/11/2022] Open
Abstract
Osteosarcoma is the main malignant primary bone tumor in children and adolescents for whom the prognosis remains poor, especially when metastases are present at diagnosis. Because we recently demonstrated that TGF-β/Smad cascade plays a crucial role in osteosarcoma metastatic progression, we investigated the effect of halofuginone, identified as an inhibitor of the TGF-β/Smad3 cascade, on osteosarcoma progression. A preclinical model of osteosarcoma was used to evaluate the impact of halofuginone on tumor growth, tumor microenvironment and metastasis development. In vivo experiments showed that halofuginone reduces primary tumor growth and lung metastases development. In vitro experiments demonstrated that halofuginone decreases cell viability mainly by its ability to induce caspase-3 dependent cell apoptosis. Moreover, halofuginone inhibits the TGF-β/Smad3 cascade and the response of TGF-β key targets involved in the metastases dissemination process such as MMP-2. In addition, halofuginone treatment affects the “vicious cycle” established between tumor and bone cells, and therefore the tumor-associated bone osteolysis. Together, these results demonstrate that halofuginone decreased primary osteosarcoma development and associated lung metastases by targeting both the tumor cells and the tumor microenvironment. Using halofuginone may be a promising therapeutic strategy against tumor progression of osteosarcoma specifically against lung metastases dissemination.
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Affiliation(s)
- Audrey Lamora
- INSERM, UMR 957, Equipe Labellisée Ligue contre le Cancer 2012, Nantes, France.,Université de Nantes, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes, France.,CHU Hôtel Dieu, Nantes, France.,Inserm Liliane Bettencourt School, France
| | - Mathilde Mullard
- INSERM, UMR 957, Equipe Labellisée Ligue contre le Cancer 2012, Nantes, France.,Université de Nantes, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes, France.,CHU Hôtel Dieu, Nantes, France
| | - Jérôme Amiaud
- INSERM, UMR 957, Equipe Labellisée Ligue contre le Cancer 2012, Nantes, France.,Université de Nantes, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes, France.,CHU Hôtel Dieu, Nantes, France
| | - Régis Brion
- INSERM, UMR 957, Equipe Labellisée Ligue contre le Cancer 2012, Nantes, France.,Université de Nantes, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes, France.,CHU Hôtel Dieu, Nantes, France
| | - Dominique Heymann
- INSERM, UMR 957, Equipe Labellisée Ligue contre le Cancer 2012, Nantes, France.,Université de Nantes, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes, France.,CHU Hôtel Dieu, Nantes, France
| | - Françoise Redini
- INSERM, UMR 957, Equipe Labellisée Ligue contre le Cancer 2012, Nantes, France.,Université de Nantes, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes, France.,CHU Hôtel Dieu, Nantes, France
| | - Franck Verrecchia
- INSERM, UMR 957, Equipe Labellisée Ligue contre le Cancer 2012, Nantes, France.,Université de Nantes, Laboratoire de Physiopathologie de la Résorption Osseuse et Thérapie des Tumeurs Osseuses Primitives, Nantes, France.,CHU Hôtel Dieu, Nantes, France
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19
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Koohestani F, Qiang W, MacNeill AL, Druschitz SA, Serna VA, Adur M, Kurita T, Nowak RA. Halofuginone suppresses growth of human uterine leiomyoma cells in a mouse xenograft model. Hum Reprod 2016; 31:1540-51. [PMID: 27130615 DOI: 10.1093/humrep/dew094] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 04/06/2016] [Indexed: 12/14/2022] Open
Abstract
STUDY QUESTION Does halofuginone (HF) inhibit the growth of human uterine leiomyoma cells in a mouse xenograft model? SUMMARY ANSWER HF suppresses the growth of human uterine leiomyoma cells in a mouse xenograft model through inhibiting cell proliferation and inducing apoptosis. WHAT IS KNOWN ALREADY Uterine leiomyomas are the most common benign tumors of the female reproductive tract. HF can suppress the growth of human uterine leiomyoma cells in vitro. The mouse xenograft model reflects the characteristics of human leiomyomas. STUDY DESIGN, SIZE, DURATION Primary leiomyoma smooth muscle cells from eight patients were xenografted under the renal capsule of adult, ovariectomized NOD-scid IL2Rγ(null) mice (NSG). Mice were treated with two different doses of HF or vehicle for 4 weeks with six to eight mice per group. PARTICIPANTS/MATERIALS, SETTING, METHODS Mouse body weight measurements and immunohistochemical analysis of body organs were carried out to assess the safety of HF treatment. Xenografted tumors were measured and analyzed for cellular and molecular changes induced by HF. Ovarian steroid hormone receptors were evaluated for possible modulation by HF. MAIN RESULTS AND THE ROLE OF CHANCE Treatment of mice carrying human UL xenografts with HF at 0.25 or 0.50 mg/kg body weight for 4 weeks resulted in a 35-40% (P < 0.05) reduction in tumor volume. The HF-induced volume reduction was accompanied by increased apoptosis and decreased cell proliferation. In contrast, there was no significant change in the collagen content either at the transcript or protein level between UL xenografts in control and HF groups. HF treatment did not change the expression level of ovarian steroid hormone receptors. No adverse pathological effects were observed in other tissues from mice undergoing treatment at these doses. LIMITATIONS, REASONS FOR CAUTION While this study did test the effects of HF on human leiomyoma cells in an in vivo model, HF was administered to mice whose tolerance and metabolism of the drug may differ from that in humans. Also, the longer term effects of HF treatment are yet unclear. WIDER IMPLICATIONS OF THE FINDINGS The results of this study showing the effectiveness of HF in reducing UL tumor growth by interfering with the main cellular processes regulating cell proliferation and apoptosis are in agreement with previous studies on the effects of HF on other fibrotic diseases. HF can be considered as a candidate for reducing the size of leiomyomas, particularly prior to surgery. STUDY FUNDING/COMPETING INTERESTS This project was funded by NIH PO1HD057877 and R01 HD064402. Authors report no competing interests.
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Affiliation(s)
- Faezeh Koohestani
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801, USA Present address: Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Wenan Qiang
- Division of Reproductive Science in Medicine, Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL 60611, USA Department of Pathology, Northwestern University, Chicago, IL 60611, USA Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA
| | - Amy L MacNeill
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana, IL 61801, USA Present address: Department of Microbiology, Immunology and Pathology, Colorado State University, Ft. Collins, CO 80523, USA
| | - Stacy A Druschitz
- Division of Reproductive Science in Medicine, Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL 60611, USA
| | - Vanida A Serna
- Division of Reproductive Science in Medicine, Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL 60611, USA Present address: Department of Molecular & Cellular Biochemistry, The Comprehensive Cancer Center, Ohio State University, Columbus, OH 43210, USA
| | - Malavika Adur
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801, USA
| | - Takeshi Kurita
- Division of Reproductive Science in Medicine, Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL 60611, USA Present address: Department of Molecular & Cellular Biochemistry, The Comprehensive Cancer Center, Ohio State University, Columbus, OH 43210, USA
| | - Romana A Nowak
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801, USA
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20
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Zaidan RK, Smullen S, Evans P. Asymmetric synthesis of (+)- and (−)-deoxyfebrifugine and deoxyhalofuginone. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.146] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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21
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Assis PA, De Figueiredo-Pontes LL, Lima ASG, Leão V, Cândido LA, Pintão CT, Garcia AB, Saggioro FP, Panepucci RA, Chahud F, Nagler A, Falcão RP, Rego EM. Halofuginone inhibits phosphorylation of SMAD-2 reducing angiogenesis and leukemia burden in an acute promyelocytic leukemia mouse model. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2015; 34:65. [PMID: 26099922 PMCID: PMC4486128 DOI: 10.1186/s13046-015-0181-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 06/11/2015] [Indexed: 01/09/2023]
Abstract
Background Halofuginone (HF) is a low-molecular-weight alkaloid that has been demonstrated to interfere with Metalloproteinase-2 (MMP-2) and Tumor Growth Factor-β (TGF-β) function and, to present antiangiogenic, antiproliferative and proapoptotic properties in several solid tumor models. Based on the fact that high levels of Vascular Endothelial Growth Factor (VEGF) and increased angiogenesis have been described in acute myeloid leukemia and associated with disease progression, we studied the in vivo effects of HF using an Acute Promyelocytic Leukemia (APL) mouse model. Methods NOD/SCID mice were transplanted with leukemic cells from hCG-PML/RARA transgenic mice (TM) and treated with HF 150 μg/kg/day for 21 days. The leukemic infiltration and the percentage of VEGF+ cells were evaluated by morphology and flow cytometry. The effect of HF on the gene expression of several pro- and antiangiogenic factors, phosphorylation of SMAD2 and VEGF secretion was assessed in vitro using NB4 and HUVEC cells. Results HF treatment resulted in hematological remission with decreased accumulation of immature cell and lower amounts of VEGF in BM of leukemic mice. In vitro, HF modulated gene expression of several pro- and antiangiogenic factors, reduced VEGF secretion and phosphorylation of SMAD2, blocking TGF-β-signaling. Conclusion Taken together, our results demonstrate that HF inhibits SMAD2 signaling and reduces leukemia growth and angiogenesis. Electronic supplementary material The online version of this article (doi:10.1186/s13046-015-0181-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Patricia A Assis
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Lorena L De Figueiredo-Pontes
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Ana Silvia G Lima
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Vitor Leão
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Larissa A Cândido
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Carolina T Pintão
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Aglair B Garcia
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Fabiano P Saggioro
- Pathology Department, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Rodrigo A Panepucci
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Fernando Chahud
- Pathology Department, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Arnon Nagler
- Hematology Division and Cord Blood Bank, Chaim Sheba Medical Center, Tel Aviv University, Tel Hashomer, 6997801, Israel.
| | - Roberto P Falcão
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
| | - Eduardo M Rego
- Hematology and Oncology Divisions of the Department of Internal Medicine, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049900, Brazil.
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Abstract
Halofuginone is an analog of febrifugine-an alkaloid originally isolated from the plant Dichroa febrifuga. During recent years, halofuginone has attracted much attention because of its wide range of beneficial biological activities, which encompass malaria, cancer, and fibrosis-related and autoimmune diseases. At present two modes of halofuginone actions have been described: (1) Inhibition of Smad3 phosphorylation downstream of the TGFβ signaling pathway results in inhibition of fibroblasts-to-myofibroblasts transition and fibrosis. (2) Inhibition of prolyl-tRNA synthetase (ProRS) activity in the blood stage of malaria and inhibition of Th17 cell differentiation thereby inhibiting inflammation and the autoimmune reaction by activation of the amino acid starvation and integrated stress responses. This review deals with the history and origin of this natural product, its synthesis, its known modes of action, and it's various biological activities in pre-clinical animal models and in humans.
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Affiliation(s)
- Mark Pines
- The Volcani Center, Institute of Animal Science, P.O. Box 6, Bet Dagan 50250, Israel.
| | - Itai Spector
- The Volcani Center, Institute of Animal Science, P.O. Box 6, Bet Dagan 50250, Israel.
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Reduction of burn scar formation by halofuginone-eluting silicone gel sheets: a controlled study on nude mice. Ann Plast Surg 2014; 72:489. [PMID: 24618743 DOI: 10.1097/sap.0b013e318281ad59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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JIN MEILING, PARK SUNYOUNG, KIM YOUNGHUN, PARK GEUNTAE, LEE SANGJOON. Halofuginone induces the apoptosis of breast cancer cells and inhibits migration via downregulation of matrix metalloproteinase-9. Int J Oncol 2013; 44:309-18. [DOI: 10.3892/ijo.2013.2157] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 10/14/2013] [Indexed: 11/06/2022] Open
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Chu TL, Guan Q, Nguan CY, Du C. Halofuginone suppresses T cell proliferation by blocking proline uptake and inducing cell apoptosis. Int Immunopharmacol 2013; 16:414-23. [DOI: 10.1016/j.intimp.2013.04.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 04/17/2013] [Accepted: 04/25/2013] [Indexed: 01/31/2023]
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26
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Al-Sadoon MK, Rabah DM, Badr G. Enhanced anticancer efficacy of snake venom combined with silica nanoparticles in a murine model of human multiple myeloma: Molecular targets for cell cycle arrest and apoptosis induction. Cell Immunol 2013; 284:129-38. [DOI: 10.1016/j.cellimm.2013.07.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Revised: 07/22/2013] [Accepted: 07/29/2013] [Indexed: 11/17/2022]
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27
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Saha MN, Qiu L, Chang H. Targeting p53 by small molecules in hematological malignancies. J Hematol Oncol 2013; 6:23. [PMID: 23531342 PMCID: PMC3614876 DOI: 10.1186/1756-8722-6-23] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 03/13/2013] [Indexed: 12/11/2022] Open
Abstract
p53 is a powerful tumor suppressor and is an attractive cancer therapeutic target. A breakthrough in cancer research came from the discovery of the drugs which are capable of reactivating p53 function. Most anti-cancer agents, from traditional chemo- and radiation therapies to more recently developed non-peptide small molecules exert their effects by enhancing the anti-proliferative activities of p53. Small molecules such as nutlin, RITA, and PRIMA-1 that can activate p53 have shown their anti-tumor effects in different types of hematological malignancies. Importantly, nutlin and PRIMA-1 have successfully reached the stage of phase I/II clinical trials in at least one type of hematological cancer. Thus, the pharmacological activation of p53 by these small molecules has a major clinical impact on prognostic use and targeted drug design. In the current review, we present the recent achievements in p53 research using small molecules in hematological malignancies. Anticancer activity of different classes of compounds targeting the p53 signaling pathway and their mechanism of action are discussed. In addition, we discuss how p53 tumor suppressor protein holds promise as a drug target for recent and future novel therapies in these diseases.
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Affiliation(s)
- Manujendra N Saha
- Division of Molecular and Cellular Biology, Toronto General Research Institute, Toronto, Canada
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Inhibition of matrix metalloproteinase-2 by halofuginone is mediated by the Egr1 transcription factor. Anticancer Drugs 2012; 23:1022-31. [DOI: 10.1097/cad.0b013e328357d186] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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29
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Juárez P, Mohammad KS, Yin JJ, Fournier PGJ, McKenna RC, Davis HW, Peng XH, Niewolna M, Javelaud D, Chirgwin JM, Mauviel A, Guise TA. Halofuginone inhibits the establishment and progression of melanoma bone metastases. Cancer Res 2012; 72:6247-56. [PMID: 23002206 DOI: 10.1158/0008-5472.can-12-1444] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
TGF-β derived from bone fuels melanoma bone metastases by inducing tumor secretion of prometastatic factors that act on bone cells to change the skeletal microenvironment. Halofuginone is a plant alkaloid derivative that blocks TGF-β signaling with antiangiogenic and antiproliferative properties. Here, we show for the first time that halofuginone therapy decreases development and progression of bone metastasis caused by melanoma cells through the inhibition of TGF-β signaling. Halofuginone treatment of human melanoma cells inhibited cell proliferation, phosphorylation of SMAD proteins in response to TGF-β, and TGF-β-induced SMAD-driven transcription. In addition, halofuginone reduced expression of TGF-β target genes that enhance bone metastases, including PTHrP, CTGF, CXCR4, and IL11. Also, cell apoptosis was increased in response to halofuginone. In nude mice inoculated with 1205 Lu melanoma cells, a preventive protocol with halofuginone inhibited bone metastasis. The beneficial effects of halofuginone treatment were comparable with those observed with other anti-TGF-β strategies, including systemic administration of SD208, a small-molecule inhibitor of TGF-β receptor I kinase, or forced overexpression of Smad7, a negative regulator of TGF-β signaling. Furthermore, mice with established bone metastases treated with halofuginone had significantly less osteolysis than mice receiving placebo assessed by radiography. Thus, halofuginone is also effective in reducing the progression of melanoma bone metastases. Moreover, halofuginone treatment reduced melanoma metastasis to the brain, showing the potential of this novel treatment against cancer metastasis.
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Affiliation(s)
- Patricia Juárez
- Division of Endocrinology and Metabolism, Department of Medicine, Indiana University-Purdue University Indianapolis, Walther Hall, C132 980 W Walnut Street, Indianapolis, IN 46202, USA
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