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Li J, Huang Y, Hou Y, Gu Y, Song C, Ge Z. High efficacy of azacitidine combined with homoharringtonine, idarubicin, and cytarabine in newly diagnosed patients with AML: A single arm, phase 2 trial. Front Oncol 2022; 12:1069246. [PMID: 36568250 PMCID: PMC9773133 DOI: 10.3389/fonc.2022.1069246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/25/2022] [Indexed: 12/13/2022] Open
Abstract
Introduction This study aims to evaluate the efficacy and safety of the novel combination of Aza and HIA as the frontline induction therapy in newly diagnosed AML patients eligible for intensive chemotherapy (IC) (registered on ClinicalTrials.gov, number NCT04248595). Methods Aza (75mg/m2/d on days1-5 subcutaneous) is administered in combination with HIA [HHT 2mg/m2/d on days 4-8 intravenous over 3 hours, idarubicin 6mg/m2/d on days 4-6 intravenous, and cytarabine 100mg/m2/d on days 4-10 intravenous]. The primary endpoint was complete remission (CR) or CR with incomplete blood count recovery (CRi). Secondary endpoints were overall survival (OS), relapse-free survival (RFS), and adverse events (AEs). Results A total of 20 AML patients (aged 18-70 years) were enrolled between Jan 2020 and Sep 2022. 95% (19/20) of patients achieved CR/CRi, and 89.5% (17/19) had undetectable MRD, in which 94.7% (18/19) reached CR/CRi, and 88.9% (16/18) obtained MRD negative after the 1st cycle of induction therapy. Median OS and RFS were both not reached during the follow-up. The estimated 2-year OS and RFS were 87.5% (95%CI, 58.6% to 96.7%) and 87.1% (95%CI, 57.3% to 96.6%), respectively. No patient discontinued the treatment for AEs. Discussion This study provides preliminary evidence for this novel combination therapy as the first-line induction therapy for young or older AML patients fit for IC.
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Affiliation(s)
- Jun Li
- Department of Hematology, Zhongda Hospital, School of Medicine, Southeast University, Institute of Hematology Southeast University, Nanjing, China
| | - Yanqing Huang
- Department of Hematology, Zhongda Hospital, School of Medicine, Southeast University, Institute of Hematology Southeast University, Nanjing, China
| | - Yue Hou
- Department of Hematology, Zhongda Hospital, School of Medicine, Southeast University, Institute of Hematology Southeast University, Nanjing, China
| | - Yan Gu
- Department of Hematology, Zhongda Hospital, School of Medicine, Southeast University, Institute of Hematology Southeast University, Nanjing, China
| | - Chunhua Song
- Hershey Medical Center, Pennsylvania State University Medical College, Hershey, PA, United States,Division of Hematology, The Ohio State University Wexner Medical Center, the James Cancer Hospital, Columbus, OH, United States
| | - Zheng Ge
- Department of Hematology, Zhongda Hospital, School of Medicine, Southeast University, Institute of Hematology Southeast University, Nanjing, China,*Correspondence: Zheng Ge,
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2
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Zhao J, Li Z, Puri R, Liu K, Nunez I, Chen L, Zheng S. Molecular profiling of individual FDA-approved clinical drugs identifies modulators of nonsense-mediated mRNA decay. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 27:304-318. [PMID: 35024243 PMCID: PMC8718828 DOI: 10.1016/j.omtn.2021.12.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 12/07/2021] [Indexed: 12/12/2022]
Abstract
Nonsense-mediated mRNA decay (NMD) degrades transcripts with premature stop codons. Given the prevalence of nonsense single nucleotide polymorphisms (SNPs) in the general population, it is urgent to catalog the effects of clinically approved drugs on NMD activity: any interference could alter the expression of nonsense SNPs, inadvertently inducing adverse effects. This risk is higher for patients with disease-causing nonsense mutations or an illness linked to dysregulated nonsense transcripts. On the other hand, hundreds of disorders are affected by cellular NMD efficiency and may benefit from NMD-modulatory drugs. Here, we profiled individual FDA-approved drugs for their impact on cellular NMD efficiency using a sensitive method that directly probes multiple endogenous NMD targets for a robust readout of NMD modulation. We found most FDA-approved drugs cause unremarkable effects on NMD, while many elicit clear transcriptional responses. Besides several potential mild NMD modulators, the anticancer drug homoharringtonine (HHT or omacetaxine mepesuccinate) consistently upregulates various endogenous NMD substrates in a dose-dependent manner in multiple cell types. We further showed translation inhibition mediates HHT's NMD effect. In summary, many FDA drugs induce transcriptional changes, and a few impact global NMD, and direct measurement of endogenous NMD substrate expression is robust to monitor cellular NMD.
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Affiliation(s)
- Jingrong Zhao
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 91709, USA
| | - Zhelin Li
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 91709, USA
| | - Ruchira Puri
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 91709, USA
| | - Kelvin Liu
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 91709, USA
| | - Israel Nunez
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 91709, USA
| | - Liang Chen
- Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA 90089, USA
| | - Sika Zheng
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 91709, USA
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3
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Yan J, Yao L, Li P, Wu G, Lv X. Long non-coding RNA MIR17HG sponges microRNA-21 to upregulate PTEN and regulate homoharringtonine-based chemoresistance of acute myeloid leukemia cells. Oncol Lett 2021; 23:24. [PMID: 34868361 PMCID: PMC8630824 DOI: 10.3892/ol.2021.13142] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 08/06/2021] [Indexed: 02/07/2023] Open
Abstract
Long non-coding (lnc)RNA MIR17HG has been identified as a oncogene whose roles in acute myeloid leukemia (AML) remain unclear. The present study aimed to investigate the role of lncRNA MIR17HG in AML. Differential expression of MIR17HG in AML was determined by reverse transcription-quantitative PCR. Overexpression assays and dual luciferase reporter assays were performed to determine the relationship between MIR17HG and microRNA (miR)-21, and apoptosis was analyzed by using an apoptosis assay. The results showed that the expression of MIR17HG was decreased in AML, which was further decreased following homoharringtonine (HHT)-based chemotherapy. Bioinformatics analysis predicted that miR-21 could bind with MIR17HG. However, miR-21 overexpression had no effect on the expression level of MIR17HG. Dual luciferase reporter assays were performed to verify the direct interaction between miR-21 and MIR17HG. In addition, overexpression of MIR17HG and miR-21 in AML cell lines up- and downregulated the expression level of PTEN, respectively. Furthermore, cell apoptosis showed that MIR17HG and PTEN overexpression enhanced cell apoptosis following cell treatment with HTT. However, miR-21 overexpression exerted the opposite effect, since it reversed the effects of MIR17HG and PTEN overexpression in AML cell apoptosis. In conclusion, the current study suggested that MIR17HG could regulate the miR-21/PTEN axis to modulate the chemoresistance of AML cells.
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Affiliation(s)
- Jinhua Yan
- Department of Hematology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330008, P.R. China
| | - Ling Yao
- Department of Gastroenterology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330008, P.R. China
| | - Ping Li
- Department of Hematology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330008, P.R. China
| | - Guohe Wu
- Department of Hematology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330008, P.R. China
| | - Xiaobin Lv
- Jiangxi Key Laboratory of Cancer Metastasis and Precision Treatment, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330008, P.R. China
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4
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Li L, Halpert G, Lerner MG, Hu H, Dimitrion P, Weiss MJ, He J, Philosophe B, Burkhart R, Burns WR, Wesson RN, MacGregor Cameron A, Wolfgang CL, Georgiades C, Kawamoto S, Azad NS, Yarchoan M, Meltzer SJ, Oshima K, Ensign LM, Bader JS, Selaru FM. Protein synthesis inhibitor omacetaxine is effective against hepatocellular carcinoma. JCI Insight 2021; 6:138197. [PMID: 34003798 PMCID: PMC8262474 DOI: 10.1172/jci.insight.138197] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/12/2021] [Indexed: 12/24/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the sixth most common and the fourth most deadly cancer worldwide. The development cost of new therapeutics is a major limitation in patient outcomes. Importantly, there is a paucity of preclinical HCC models in which to test new small molecules. Herein, we implemented potentially novel patient-derived organoid (PDO) and patient-derived xenografts (PDX) strategies for high-throughput drug screening. Omacetaxine, an FDA-approved drug for chronic myelogenous leukemia (CML), was found to be a top effective small molecule in HCC PDOs. Next, omacetaxine was tested against a larger cohort of 40 human HCC PDOs. Serial dilution experiments demonstrated that omacetaxine is effective at low (nanomolar) concentrations. Mechanistic studies established that omacetaxine inhibits global protein synthesis, with a disproportionate effect on short–half-life proteins. High-throughput expression screening identified molecular targets for omacetaxine, including key oncogenes, such as PLK1. In conclusion, by using an innovative strategy, we report — for the first time to our knowledge — the effectiveness of omacetaxine in HCC. In addition, we elucidate key mechanisms of omacetaxine action. Finally, we provide a proof-of-principle basis for future studies applying drug screening PDOs sequenced with candidate validation in PDX models. Clinical trials could be considered to evaluate omacetaxine in patients with HCC.
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Affiliation(s)
- Ling Li
- Division of Gastroenterology and Hepatology and
| | - Gilad Halpert
- Center for Nanomedicine at the Wilmer Eye Institute, Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Michael G Lerner
- Department of Physics and Astronomy, Earlham College, Richmond, Indiana, USA
| | - Haijie Hu
- Division of Gastroenterology and Hepatology and
| | - Peter Dimitrion
- Center for Nanomedicine at the Wilmer Eye Institute, Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Matthew J Weiss
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jin He
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Benjamin Philosophe
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Richard Burkhart
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - William R Burns
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Russell N Wesson
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | | | | | | | - Nilofer S Azad
- Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Mark Yarchoan
- Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Stephen J Meltzer
- Division of Gastroenterology and Hepatology and.,Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | - Laura M Ensign
- Center for Nanomedicine at the Wilmer Eye Institute, Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA
| | - Joel S Bader
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA
| | - Florin M Selaru
- Division of Gastroenterology and Hepatology and.,Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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5
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Ethnopharmacology, chemodiversity, and bioactivity of Cephalotaxus medicinal plants. Chin J Nat Med 2021; 19:321-338. [PMID: 33941338 DOI: 10.1016/s1875-5364(21)60032-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Indexed: 12/16/2022]
Abstract
Cephalotaxus is the only genus of Cephalotaxaceae family, and its natural resources are declining due to habitat fragmentation, excessive exploitation and destruction. In many areas of China, folk herbal doctors traditionally use Cephalotaxus plants to treat innominate swollen poison, many of which are cancer. Not only among Han people, but also among minority ethnic groups, Cephalotaxus is used to treat various diseases, e.g., cough, internal bleeding and cancer in Miao medicine, bruises, rheumatism and pain in Yao medicine, and ascariasis, hookworm disease, scrofula in She medicine, etc. Medicinal values of some Cephalotaxus species and compounds are acknowledged officially. However, there is a lack of comprehensive review summarizing the ethnomedicinal knowledge of Cephalotaxus, relevant medicinal phytometabolites and their bioactivities. The research progresses in ethnopharmacology, chemodiversity, and bioactivities of Cephalotaxus medicinal plants are reviewed and commented here. Knowledge gaps are pinpointed and future research directions are suggested. Classic medicinal books, folk medicine books, herbal manuals and ethnomedicinal publications were reviewed for the genus Cephalotaxus (Sanjianshan in Chinese). The relevant data about ethnobotany, phytochemistry, and pharmacology were collected as comprehensively as possible from online databases including Scopus, NCBI PubMed, Bing Scholar, and China National Knowledge Infrastructure (CNKI). "Cephalotaxus", and the respective species name were used as keywords in database search. The obtained articles of the past six decades were collated and analyzed. Four Cephalotaxus species are listed in the official medicinal book in China. They are used as ethnomedicines by many ethnic groups such as Miao, Yao, Dong, She and Han. Inspirations are obtained from traditional applications, and Cephalotaxus phytometabolites are developed into anticancer reagents. Cephalotaxine-type alkaloids, homoerythrina-type alkaloids and homoharringtonine (HHT) are abundant in Cephalotaxus, e.g., C. lanceolata, C. fortunei var. alpina, C. griffithii, and C. hainanensis, etc. New methods of alkaloid analysis and purification are continuously developed and applied. Diterpenoids, sesquiterpenoids, flavonoids, lignans, phenolics, and other components are also identified and isolated in various Cephalotaxus species. Alkaloids such as HHT, terpenoids and other compounds have anticancer activities against multiple types of human cancer. Cephalotaxus extracts and compounds showed anti-inflammatory and antioxidant activities, immunomodulatory activity, antimicrobial activity and nematotoxicity, antihyperglycemic effect, and bone effect, etc. Drug metabolism and pharmacokinetic studies of Cephalotaxus are increasing. We should continue to collect and sort out folk medicinal knowledge of Cephalotaxus and associated organisms, so as to obtain new enlightenment to translate traditional tips into great therapeutic drugs. Transcriptomics, genomics, metabolomics and proteomics studies can contribute massive information for bioactivity and phytochemistry of Cephalotaxus medicinal plants. We should continue to strengthen the application of state-of-the-art technologies in more Cephalotaxus species and for more useful compounds and pharmacological activities.
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6
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Wang F, Huang J, Guo T, Zheng Y, Zhang L, Zhang D, Wang F, Naren D, Cui Y, Liu X, Qu Y, Luo H, Yang Y, Wei H, Guo Y. Homoharringtonine synergizes with quizartinib in FLT3-ITD acute myeloid leukemia by targeting FLT3-AKT-c-Myc pathway. Biochem Pharmacol 2021; 188:114538. [PMID: 33831397 DOI: 10.1016/j.bcp.2021.114538] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/14/2021] [Accepted: 03/26/2021] [Indexed: 02/05/2023]
Abstract
Acute myeloid leukemia (AML) with FLT3 internal tandem duplication (FLT3-ITD) has a dismal prognosis. FLT3 inhibitors have been developed to treat patients with FLT3-ITD AML; however, when used alone, their efficacy is insufficient. FLT3 inhibitors combined with chemotherapy may be a promising treatment for FLT3-ITD AML. Homoharringtonine (HHT) is a classical anti-leukaemia drug with high sensitivity to FLT3-ITD AML cells. Here, we showed that HHT synergizes with a selective next-generation FLT3 inhibitor, quizartinib, to inhibit cell growth/viability and induce cell-cycle arrest and apoptosis in FLT3-ITD AML cells in vitro, significantly inhibit acute myeloid leukemia progression in vivo, and substantially prolong survival of mice-bearing human FLT3-ITD AML. Mechanistically, HHT and quizartinib cooperatively inhibit FLT3-AKT and its downstream targets GSK3β, c-Myc, and cyclin D1, cooperatively up-regulate the pro-apoptosis proteins Bim and Bax, and down-regulate the anti-apoptosis protein Mcl1. Most strikingly, HHT and quizartinib cooperatively reduce the numbers of side-population (SP) and aldehyde dehydrogenase (ALDH)-positive cells, which reportedly are rich in LSCs. In conclusion, HHT combined with quizartinib may be a promising treatment strategy for patients with FLT3-ITD AML.
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Affiliation(s)
- Fangfang Wang
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Jingcao Huang
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Tingting Guo
- Precision Medicine Research Laboratory, West China Hospital of Sichuan University, Chengdu, China
| | - Yuhuan Zheng
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Li Zhang
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Dan Zhang
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Fujue Wang
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Duolan Naren
- Department of Hematology, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yushan Cui
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Xiaoyan Liu
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Ying Qu
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Hongmei Luo
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Yan Yang
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Haichen Wei
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China
| | - Yong Guo
- Hematology Research Laboratory, Department of Hematology, West China Hospital of Sichuan University, Chengdu, China.
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7
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Wang LB, Wang DN, Wu LG, Cao J, Tian JH, Liu R, Ma R, Yu JJ, Wang J, Huang Q, Xiong WY, Zhang X. Homoharringtonine inhibited breast cancer cells growth via miR-18a-3p/AKT/mTOR signaling pathway. Int J Biol Sci 2021; 17:995-1009. [PMID: 33867824 PMCID: PMC8040299 DOI: 10.7150/ijbs.44907] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 02/03/2021] [Indexed: 02/06/2023] Open
Abstract
Homoharringtonine (HHT), a natural alkaloid derived from the cephalotaxus, exhibited its anti-cancer effects in hematological malignancies clinically. However, its pesticide effects and mechanisms in treating solid tumors remain unclear. In this study, we found that HHT was capable of inhibiting tumor growth after 5-days treatment of breast cancer cells, MCF-7, in vivo. Furthemore, HHT also significantly inhibited the cancer cell growth and induced cell apoptosis in vitro. miRNA sequencing proved miR-18a-3p was noticeably downregulated in the cells after HHT treatment. Moreover, downregulating miR-18a-3p increased HHT-induced cell apoptosis; our data supported that HHT suppressed miR-18a-3p expression and inhibited tumorigenesis might via AKT-mTOR signaling pathway. In conclusion: our study proved that HHT suppressed breast cancer cell growth and promoted apoptosis mediated by regulating of the miR-18a-3p-AKT-mTOR signaling pathway, HHT may be a promising antitumor agent in breast cancer treatment.
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Affiliation(s)
- Li-Bin Wang
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Dan-Ni Wang
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China.,Gansu Provincial Hospital, Clinical Laboratory Center, Lanzhou, 730000, China
| | - Li-Gang Wu
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Jia Cao
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Jin-Hai Tian
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Rong Liu
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Rong Ma
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Jing-Jing Yu
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Jia Wang
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Qi Huang
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
| | - Wen-Yong Xiong
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China.,Key Laboratory of Medicinal Chemistry for Natural Resource, Yunnan University, Kunming, 650091, China
| | - Xu Zhang
- The General Hospital of Ningxia Medical University, Biochip Research Center, Yinchuan, 750001, China
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8
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Wu CI, Wen H. Heightened protein-translation activities in mammalian cells and the disease/treatment implications. Natl Sci Rev 2020; 7:1851-1855. [PMID: 34691526 PMCID: PMC8288750 DOI: 10.1093/nsr/nwaa066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Chung-I Wu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, China
| | - Haijun Wen
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, China
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9
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Zhang Y, Huang N, Xu J, Zheng W, Cui X. Homoharringtonine Exerts an Antimyeloma Effect by Promoting Excess Parkin-Dependent Mitophagy. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:4749-4763. [PMID: 33177810 PMCID: PMC7652225 DOI: 10.2147/dddt.s279054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 10/07/2020] [Indexed: 12/13/2022]
Abstract
Purpose Homoharringtonine (HHT) has been used as an antileukemia agent in the clinic which processes a high-potential therapeutic efficacy against multiple myeloma (MM). In this study, we investigated the antimyeloma mechanism of HHT. Methods Three MM cell lines and a xenograft model were applied. Mitochondrial function was evaluated by detecting MitoTracker Green, the mtDNA copy number, mitochondrial protein and enzyme activity, the mitochondrial membrane potential and mitochondrial morphology. Mitophagy levels were assessed by monitoring autophagosomes, performing a colocalization analysis and determining the levels of related proteins. An shRNA was applied to knockdown Parkin. Results Based on the results of the in vitro experiments, HHT exerted a promising antiproliferative effect on the MM.1S, RPMI 8226 and H929 cell lines by increasing mitophagy. In addition, HHT markedly inhibited myeloma tumor growth and prolonged survival by promoting mitophagy in vivo. Furthermore, HHT treatment contributed to notable mitochondrial dysfunction and Parkin-dependent mitophagy, as evidenced by the destruction of mitochondria, the decrease in the mtDNA copy number, decrease in the Bcl-2/Bax ratio, and decrease in the levels of mitochondrial proteins and the optimal expression of Parkin and NDP52. However, the addition of rapamycin did not produce significant synergistic effect with HHT, indicating that HHT reached the threshold level to induce mitophagy. The colocalization analysis and assessment of mitochondrial function examination further confirmed that HHT triggered mitophagy and mitochondrial dysfunction. Moreover, the antiproliferative effect of HHT was reversed by an shRNA targeting Parkin, highlighting the indispensable role of Parkin-dependent mitophagy in the antimyeloma effect of HHT. Conclusion HHT exerts an antimyeloma effect by inducing excess mitophagy, providing new mechanistic insights into a therapeutic strategy for MM.
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Affiliation(s)
- Yanyu Zhang
- Department of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Ning Huang
- Clinical Laboratory Department, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Jie Xu
- Department of Hematology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Wei Zheng
- Department of Hematology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
| | - Xing Cui
- Department of Hematology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, People's Republic of China
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10
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Walker ZJ, Idler BM, Davis LN, Stevens BM, VanWyngarden MJ, Ohlstrom D, Bearrows SC, Hammes A, Smith CA, Jordan CT, Mark TM, Forsberg PA, Sherbenou DW. Exploiting Protein Translation Dependence in Multiple Myeloma with Omacetaxine-Based Therapy. Clin Cancer Res 2020; 27:819-830. [PMID: 33109736 DOI: 10.1158/1078-0432.ccr-20-2246] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/18/2020] [Accepted: 10/22/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE The prognosis of patients with multiple myeloma who are resistant to proteasome inhibitors, immunomodulatory drugs (IMiD), and daratumumab is extremely poor. Even B-cell maturation antigen-specific chimeric antigen receptor T-cell therapies provide only a temporary benefit before patients succumb to their disease. In this article, we interrogate the unique sensitivity of multiple myeloma cells to the alternative strategy of blocking protein translation with omacetaxine. EXPERIMENTAL DESIGN We determined protein translation levels (n = 17) and sensitivity to omacetaxine (n = 51) of primary multiple myeloma patient samples. Synergy was evaluated between omacetaxine and IMiDs in vitro, ex vivo, and in vivo. Underlying mechanism was investigated via proteomic analysis. RESULTS Almost universally, primary patient multiple myeloma cells exhibit >2.5-fold increased rates of protein translation compared with normal marrow cells. Ex vivo treatment with omacetaxine resulted in >50% reduction in viable multiple myeloma cells. In this cohort, high levels of translation serve as a biomarker for patient multiple myeloma cell sensitivity to omacetaxine. Unexpectedly, omacetaxine demonstrated synergy with IMiDs in multiple myeloma cell lines in vitro. In addition, in an IMiD-resistant relapsed patient sample, omacetaxine/IMiD combination treatment resensitized the multiple myeloma cells to the IMiD. Proteomic analysis found that the omacetaxine/IMiD combination treatment produced a double-hit on the IRF4/c-MYC pathway, which is critical to multiple myeloma survival. CONCLUSIONS Overall, protein translation inhibitors represent a potential new drug class for myeloma treatment and provide a rationale for conducting clinical trials with omacetaxine alone and in combination with IMiDs for patients with relapsed/refractory multiple myeloma.
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Affiliation(s)
- Zachary J Walker
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Beau M Idler
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Lorraine N Davis
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Brett M Stevens
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Michael J VanWyngarden
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Denis Ohlstrom
- Biomedical Sciences and Biotechnology, Graduate School, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Shelby C Bearrows
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Andrew Hammes
- Center for Innovative Design and Analysis, Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Clayton A Smith
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado.,University of Colorado Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Craig T Jordan
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado.,University of Colorado Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Tomer M Mark
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Peter A Forsberg
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Daniel W Sherbenou
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado. .,University of Colorado Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado
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11
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Paul B, Zhao Y, Loitsch G, Feinberg D, Mathews P, Barak I, Dupuis M, Li Z, Rein L, Wang E, Kang Y. The impact of bone marrow fibrosis and JAK2 expression on clinical outcomes in patients with newly diagnosed multiple myeloma treated with immunomodulatory agents and/or proteasome inhibitors. Cancer Med 2020; 9:5869-5880. [PMID: 32628819 PMCID: PMC7433821 DOI: 10.1002/cam4.3265] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 06/09/2020] [Accepted: 06/10/2020] [Indexed: 01/11/2023] Open
Abstract
We determined the impact of bone marrow fibrosis (BMF) on the clinical outcomes of newly diagnosed multiple myeloma (NDMM) patients in the current era of myeloma therapy. A total of 393 MM patients were included in the final analysis. The median followup was 83 months (range: 3.9 to 212 months). BMF was noted in 122 (48.2%) evaluable patients. Median progression free survival (PFS) in patients without BMF was 30.2 (95% CI: 24.7-38.0) months, and 21.1 (95% CI: 18.8-27.5) months in patients with BMF present (P = .024). Median overall survival (OS) was 61.2 (95% CI: 51.5-81.2) months in patients without BMF, and 45.1 (95% CI: 38.7-57.0) months in patients with BMF (P = .0048). A subset of 99 patients had their bone marrow biopsies stained for JAK1 and JAK2 by immunohistochemistry. Of these samples 67 (67.7%) patients had detectable JAK2 expression predominantly noted on bone marrow megakaryocytes. JAK2 expression correlated with myeloma disease stage (P = .0071). Our study represents the largest dataset to date examining the association of BMF with prognosis in the era of novel therapies and widespread use of hematopoietic stem cell transplant (HSCT). Our data suggest that MM patients with BMF (particularly those with extensive BMF) have a poorer prognosis even when treated with immunomodulatory agents and proteasome inhibitors.
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Affiliation(s)
- Barry Paul
- Division of Hematologic Malignancies and Cellular Therapy, Duke University Medical Center, Durham, NC, USA
| | - Yue Zhao
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Gavin Loitsch
- Division of Hematologic Malignancies and Cellular Therapy, Duke University Medical Center, Durham, NC, USA
| | - Daniel Feinberg
- Division of Hematologic Malignancies and Cellular Therapy, Duke University Medical Center, Durham, NC, USA
| | - Parker Mathews
- Division of Hematologic Malignancies and Cellular Therapy, Duke University Medical Center, Durham, NC, USA
| | - Ian Barak
- Biostatistics Shared Resource, Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA
| | - Megan Dupuis
- Hematology/Oncology Fellowship Program, MD Anderson Cancer Center, University of Texas, Houston, TX, USA
| | - Zhiguo Li
- Biostatistics Shared Resource, Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA
| | - Lindsay Rein
- Division of Hematologic Malignancies and Cellular Therapy, Duke University Medical Center, Durham, NC, USA
| | - Endi Wang
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Yubin Kang
- Division of Hematologic Malignancies and Cellular Therapy, Duke University Medical Center, Durham, NC, USA
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12
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Targeting the Human 80S Ribosome in Cancer: From Structure to Function and Drug Design for Innovative Adjuvant Therapeutic Strategies. Cells 2020; 9:cells9030629. [PMID: 32151059 PMCID: PMC7140421 DOI: 10.3390/cells9030629] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/28/2020] [Accepted: 03/02/2020] [Indexed: 12/12/2022] Open
Abstract
The human 80S ribosome is the cellular nucleoprotein nanomachine in charge of protein synthesis that is profoundly affected during cancer transformation by oncogenic proteins and provides cancerous proliferating cells with proteins and therefore biomass. Indeed, cancer is associated with an increase in ribosome biogenesis and mutations in several ribosomal proteins genes are found in ribosomopathies, which are congenital diseases that display an elevated risk of cancer. Ribosomes and their biogenesis therefore represent attractive anti-cancer targets and several strategies are being developed to identify efficient and specific drugs. Homoharringtonine (HHT) is the only direct ribosome inhibitor currently used in clinics for cancer treatments, although many classical chemotherapeutic drugs also appear to impact on protein synthesis. Here we review the role of the human ribosome as a medical target in cancer, and how functional and structural analysis combined with chemical synthesis of new inhibitors can synergize. The possible existence of oncoribosomes is also discussed. The emerging idea is that targeting the human ribosome could not only allow the interference with cancer cell addiction towards protein synthesis and possibly induce their death but may also be highly valuable to decrease the levels of oncogenic proteins that display a high turnover rate (MYC, MCL1). Cryo-electron microscopy (cryo-EM) is an advanced method that allows the visualization of human ribosome complexes with factors and bound inhibitors to improve our understanding of their functioning mechanisms mode. Cryo-EM structures could greatly assist the foundation phase of a novel drug-design strategy. One goal would be to identify new specific and active molecules targeting the ribosome in cancer such as derivatives of cycloheximide, a well-known ribosome inhibitor.
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13
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Gu X, Chen Y, Lou Y, Zheng J. Separation and characterization of forced degradation products in homoharringtonine injection by UHPLC-Q-TOF-MS. J Pharm Biomed Anal 2019; 176:112801. [PMID: 31430625 DOI: 10.1016/j.jpba.2019.112801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 07/31/2019] [Accepted: 08/02/2019] [Indexed: 10/26/2022]
Abstract
A rapid ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) method was developed for separation and characterization of the degradation products in HHT injection. Chromatographic separation was achieved on a ZORBAX Eclipse XDB-C18 HD column (2.1 × 100 mm, 1.8μm) using methanol- ammonium formate (pH 3.0; 30 mM) (30:70, v/v) as mobile phase in an isocratic mode of elution. Forced degradation studies were conducted under hydrolytic (acidic and alkaline), oxidative, photolytic and thermal stress conditions as described in ICH. A total of eleven forced degradation products were detected and the drug was found to be susceptible to all the tested stress conditions. The degradation products were characterized through Q-TOF fragmentation studies and their fragmentation pathways were proposed. Seven of them have not been reported or described as degradation product before, and one of them was further confirmed by reference substance. In addition, plausible mechanisms for the formation of the degradation products were proposed.
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Affiliation(s)
- Xiao Gu
- Zhejiang Institute for Food and Drug Control, Hangzhou 310004, Zhejiang, China
| | - Yue Chen
- Zhejiang Institute for Food and Drug Control, Hangzhou 310004, Zhejiang, China
| | - Yongjun Lou
- Zhejiang Institute for Food and Drug Control, Hangzhou 310004, Zhejiang, China
| | - Jinqi Zheng
- Zhejiang Institute for Food and Drug Control, Hangzhou 310004, Zhejiang, China.
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14
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Li S, Bo Z, Jiang Y, Song X, Wang C, Tong Y. Homoharringtonine promotes BCR‑ABL degradation through the p62‑mediated autophagy pathway. Oncol Rep 2019; 43:113-120. [PMID: 31789418 PMCID: PMC6908937 DOI: 10.3892/or.2019.7412] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 10/11/2019] [Indexed: 01/05/2023] Open
Abstract
Drug resistance to tyrosine kinase inhibitors (TKIs) is currently a clinical problem in patients with chronic myelogenous leukemia (CML). Homoharringtonine (HHT) is an approved treatment for adult patients with chronic- or accelerated-phase CML who are resistant to TKIs and other therapies; however, the underlying mechanisms remain unclear. In the present study, HHT treatment demonstrated induction of apoptosis in imatinib-resistant K562G cells by using MTS assay and western blotting, and BCR-ABL protein was reduced. CHX chase assay revealed that HHT induced degradation of the BCR-ABL protein, which could be reversed by autophagy lysosome inhibitors Baf-A1 and CQ. Next, HHT treatment confirmed the induction of autophagy in K562G cells, and silencing the key autophagic proteins ATG5 and Beclin-1 inhibited the degradation of the BCR-ABL protein and cytotoxicity. In addition, autophagic receptor p62/SQSTM1(p62) participated during the autophagic degradation of BCR-ABL induced by HHT, and this was confirmed by co-immunoprecipitation, in which HHT enhanced the ubiquitination of the BCR-ABL protein and promoted its binding to p62. In conclusion, HHT induced p62-mediated autophagy in imatinib-resistant CML K562G cells, thus promoting autophagic degradation of the BCR-ABL protein and providing a novel strategy for the treatment of TKI-resistant CML.
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Affiliation(s)
- Su Li
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Zhilei Bo
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Ying Jiang
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Xianmin Song
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Chun Wang
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Yin Tong
- Department of Hematology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
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15
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Park M, Kwon HJ, Kim SH. Homoharringtonine Induces Apoptosis in Human Colorectal Carcinoma HCT116 Cells Via Downregulation of Wnt/β‐Catenin Signaling Cascade. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mikyung Park
- Innovative Target Research Center, Bio & Drug Discovery DivisionKorea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
- Chemical Genomics GRL, Department of BiotechnologyYonsei University, College of Life Science & Biotechnology Seoul 03722 Republic of Korea
| | - Ho Jeong Kwon
- Chemical Genomics GRL, Department of BiotechnologyYonsei University, College of Life Science & Biotechnology Seoul 03722 Republic of Korea
| | - Seong Hwan Kim
- Innovative Target Research Center, Bio & Drug Discovery DivisionKorea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
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16
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Nguyen T, Parker R, Zhang Y, Hawkins E, Kmieciak M, Craun W, Grant S. Homoharringtonine interacts synergistically with bortezomib in NHL cells through MCL-1 and NOXA-dependent mechanisms. BMC Cancer 2018; 18:1129. [PMID: 30445933 PMCID: PMC6240231 DOI: 10.1186/s12885-018-5018-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 10/30/2018] [Indexed: 12/20/2022] Open
Abstract
Background Interactions between the protein synthesis inhibitor homoharringtonine (HHT) and the proteasome inhibitor bortezomib were investigated in DLBCL and mantle cell lymphoma cells (MCL). Methods Various DLBCL and MCL cells were exposed to HHT and bortezomib alone or together after which apoptosis and signaling pathway perturbations were monitored by flow cytometry and Western blot analysis. Xenograft mouse models were used to assess tumor growth and animal survival. Results HHT and bortezomib co-administration synergistically induced apoptosis in GC-, ABC- and double-hit DLBCL cells. Similar interactions were observed in MCL cells and in primary lymphoma cells. HHT/bortezomib co-administration diminished binding of MCL-1 to both BAK and NOXA. Knock-down of NOXA significantly diminished lethality whereas MCL-1 knock-down or ectopic NOXA expression increased cell death. Notably, HHT/bortezomib lethality was dramatically reduced in BAK knockout or knockdown cells. Finally, HHT/bortezomib co-administration significantly improved survival compared to single agents in GC- and ABC- xenograft models while exhibiting little toxicity. Conclusions These findings indicate that HHT and bortezomib cooperate to kill DLBCL and MCL cells through a process involving MCL-1 down-regulation, NOXA up-regulation, and BAK activation. They also suggest that a strategy combining HHT with bortezomib warrants attention in DLBCL and MCL. Electronic supplementary material The online version of this article (10.1186/s12885-018-5018-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tri Nguyen
- Division of Hematology/Oncology, Virginia Commonwealth University Richmond, Room 229 Goodwin Research Building, 401 College Street, Richmond, VA, 23229, USA.,Massey Cancer Center, Virginia Commonwealth University Richmond, Richmond, VA, USA
| | - Rebecca Parker
- Division of Hematology/Oncology, Virginia Commonwealth University Richmond, Room 229 Goodwin Research Building, 401 College Street, Richmond, VA, 23229, USA
| | - Yu Zhang
- Division of Hematology/Oncology, Virginia Commonwealth University Richmond, Room 229 Goodwin Research Building, 401 College Street, Richmond, VA, 23229, USA
| | - Elisa Hawkins
- Division of Hematology/Oncology, Virginia Commonwealth University Richmond, Room 229 Goodwin Research Building, 401 College Street, Richmond, VA, 23229, USA
| | - Maciej Kmieciak
- Massey Cancer Center, Virginia Commonwealth University Richmond, Richmond, VA, USA
| | - William Craun
- Division of Hematology/Oncology, Virginia Commonwealth University Richmond, Room 229 Goodwin Research Building, 401 College Street, Richmond, VA, 23229, USA
| | - Steven Grant
- Division of Hematology/Oncology, Virginia Commonwealth University Richmond, Room 229 Goodwin Research Building, 401 College Street, Richmond, VA, 23229, USA. .,Palliative Care, Virginia Commonwealth University Richmond, Richmond, VA, USA. .,Department of Biochemistry, Virginia Commonwealth University Richmond, Richmond, VA, USA. .,Human and Molecular Genetics, Virginia Commonwealth University Richmond, Richmond, VA, USA. .,Massey Cancer Center, Virginia Commonwealth University Richmond, Richmond, VA, USA.
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17
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Sun Q, Li S, Li J, Fu Q, Wang Z, Li B, Liu SS, Su Z, Song J, Lu D. Homoharringtonine regulates the alternative splicing of Bcl-x and caspase 9 through a protein phosphatase 1-dependent mechanism. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 18:164. [PMID: 29788973 PMCID: PMC5964699 DOI: 10.1186/s12906-018-2233-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 05/15/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND Homoharringtonine (HHT) is a natural alkaloid with potent antitumor activity, but its precise mechanism of action is still poorly understood. METHODS We examined the effect of HHT on alternative splicing of Bcl-x and Caspase 9 in various cells using semi-quantitative reverse transcriptase-polymerase chain reaction (RT-PCR). The mechanism of HHT-affected alternative splicing in these cells was investigated by treatment with protein phosphatase inhibitors and overexpression of a protein phosphatase. RESULTS Treatment with HHT downregulated the levels of anti-apoptotic Bcl-xL and Caspase 9b mRNA with a concomitant increase in the mRNA levels of pro-apoptotic Bcl-xS and Caspase 9a in a dose- and time-dependent manner. Calyculin A, an inhibitor of protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A), significantly inhibited the effects of HHT on the alternative splicing of Bcl-x and Caspase 9, in contrast to okadaic acid, a specific inhibitor of PP2A. Overexpression of PP1 resulted in a decrease in the ratio of Bcl-xL/xS and an increase in the ratio of Caspase 9a/9b. Moreover, the effects of HHT on Bcl-x and Caspase 9 splicing were enhanced in response to PP1 overexpression. These results suggest that HHT-induced alternative splicing of Bcl-x and Caspase 9 is dependent on PP1 activation. In addition, overexpression of PP1 could induce apoptosis and sensitize MCF7 cells to apoptosis induced by HHT. CONCLUSION Homoharringtonine regulates the alternative splicing of Bcl-x and Caspase 9 through a PP1-dependent mechanism. Our study reveals a novel mechanism underlying the antitumor activities of HHT.
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18
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Homoharringtonine targets Smad3 and TGF-β pathway to inhibit the proliferation of acute myeloid leukemia cells. Oncotarget 2018; 8:40318-40326. [PMID: 28454099 PMCID: PMC5522237 DOI: 10.18632/oncotarget.16956] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 03/29/2017] [Indexed: 12/21/2022] Open
Abstract
Homoharringtonine (HHT) has long and widely been used in China for the treatment of acute myeloid leukemia (AML), the clinical therapeutic effect is significant but the working mechanism is poorly understood. The purpose of this study is to screen the possible target for HHT with virtual screening and verify the findings by cell experiments. Software including Autodock, Python, and MGL tools were used, with HHT being the ligand and proteins from PI3K-Akt pathway, Jak-stat pathway, TGF-β pathway and NK-κB pathway as the receptors. Human AML cell lines including U937, KG-1, THP-1 were cultured and used as the experiment cell lines. MTT assay was used for proliferation detection, flowcytometry was used to detect apoptosis and cell cycle arrest upon HHT functioning, western blotting was used to detect the protein level changes, viral shRNA transfection was used to suppress the expression level of the target protein candidate, and viral mRNA transfection was used for over-expression. Virtual screening revealed that smad3 from TGF-β pathway might be the candidate for HHT binding. In AML cell line U937 and KG-1, HHT can induce the Ser423/425 phosphorylation of smad3, and this phosphorylation can subsequently activate the TGF-β pathway, causing cell cycle arrest at G1 phase in U937 cells and apoptosis in KG-1 cells, knockdown of smad3 can impair the sensitivity of U937 cell to HHT, and over-expression of smad3 can re-establish the sensitivity in both cell lines. We conclude that smad3 is the probable target protein of HHT and plays an important role in the functioning mechanism of HHT.
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19
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Pérard-Viret J, Quteishat L, Alsalim R, Royer J, Dumas F. Cephalotaxus Alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2017; 78:205-352. [PMID: 28838429 PMCID: PMC7110560 DOI: 10.1016/bs.alkal.2017.07.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cephalotaxus alkaloids represent a family of plant secondary metabolites known for 60 years. Significant activity against leukemia in mice was demonstrated for extracts of Cephalotaxus. Cephalotaxine (CET) (1), the major alkaloid of this series was isolated from Cephalotaxus drupacea species by Paudler in 1963. The subsequent discovery of promising antitumor activity among new Cephalotaxus derivatives reported by Chinese, Japanese, and American teams triggered extensive structure elucidation and biological studies in this family. The structural feature of this cephalotaxane family relies mainly on its tetracyclic alkaloid backbone, which comprises an azaspiranic 1-azaspiro[4.4]nonane unit (rings C and D) and a benzazepine ring system (rings A and B), which is linked by its C3 alcohol function to a chiral oxygenated side chain by a carboxylic function alpha to a tetrasubstituted carbon center. The botanical distribution of these alkaloids is limited to the Cephalotaxus genus (Cephalotaxaceae). The scope of biological activities of the Cephalotaxus alkaloids is mainly centered on the antileukemic activity of homoharringtonine (HHT) (2), which in particular demonstrated marked benefits in the treatment of orphan myeloid leukemia and was approved as soon as 2009 by European Medicine Agency and by US Food and Drug Administration in 2012. Its exact mechanism of action was partly elucidated and it was early recognized that HHT (2) inhibited protein synthesis at the level of the ribosome machinery. Interestingly, after a latency period of two decades, the topic of Cephalotaxus alkaloids reemerged as a prolific source of new natural structures. To date, more than 70 compounds have been identified and characterized. Synthetic studies also regained attention during the past two decades, and numerous methodologies were developed to access the first semisynthetic HHT (2) of high purity suitable for clinical studies, and then high grade enantiomerically pure CET (1), HHT (2), and analogs.
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Affiliation(s)
- Joëlle Pérard-Viret
- Université Paris Descartes, CNRS, Université Sorbonne Paris Cité, Paris, France
| | - Laith Quteishat
- Université Paris Sud, CNRS, Université Paris Saclay, Châtenay-Malabry, France
| | - Rana Alsalim
- Université Paris Sud, CNRS, Université Paris Saclay, Châtenay-Malabry, France
| | - Jacques Royer
- Université Paris Descartes, CNRS, Université Sorbonne Paris Cité, Paris, France
| | - Françoise Dumas
- Université Paris Sud, CNRS, Université Paris Saclay, Châtenay-Malabry, France
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20
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Riz I, Hawley RG. Increased expression of the tight junction protein TJP1/ZO-1 is associated with upregulation of TAZ-TEAD activity and an adult tissue stem cell signature in carfilzomib-resistant multiple myeloma cells and high-risk multiple myeloma patients. Oncoscience 2017; 4:79-94. [PMID: 28966941 PMCID: PMC5616201 DOI: 10.18632/oncoscience.356] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 06/23/2017] [Indexed: 02/07/2023] Open
Abstract
Tight junction protein 1 (TJP1) has recently been proposed as a biomarker to identify multiple myeloma (MM) patients most likely to respond to bortezomib- and carfilzomib-based proteasome inhibitor regimens. Herein we report increased expression of TJP1 during the adaptive response mediating carfilzomib resistance in the LP-1/Cfz MM cell line. Moreover, increased TJP1 expression delineated a subset of relapsed/refractory MM patients on bortezomib-based therapy sharing an LP-1/Cfz-like phenotype characterized by activation of interacting transcriptional effectors of the Hippo signaling cascade (TAZ and TEAD1) and an adult tissue stem cell signature. siRNA-mediated knockdown of TJP1 or TAZ/TEAD1 partially sensitized LP-1/Cfz cells to carfilzomib. Connectivity Map analysis identified translation inhibitors as candidate therapeutic agents targeting this molecular phenotype. We confirmed this prediction by showing that homoharringtonine (omacetaxine mepesuccinate) — the first translation inhibitor to be approved by the U.S. Food and Drug Administration — displayed potent cytotoxic activity on LP-1/Cfz cells. Homoharringtonine treatment reduced the levels of TAZ and TEAD1 as well as the MM-protective proteins Nrf2 and MCL1. Thus, our data suggest the importance of further studies evaluating translation inhibitors in relapsed/refractory MM. On the other hand, use of TJP1 as a MM biomarker for proteasome inhibitor sensitivity requires careful consideration.
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Affiliation(s)
- Irene Riz
- Department of Anatomy and Regenerative Biology, George Washington University, Washington, DC, USA
| | - Robert G Hawley
- Department of Anatomy and Regenerative Biology, George Washington University, Washington, DC, USA
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21
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Homoharringtonine enhances bortezomib antimyeloma activity in myeloma cells adhesion to bone marrow stromal cells and in SCID mouse xenografts. Leuk Res 2017; 57:119-126. [DOI: 10.1016/j.leukres.2017.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 04/20/2017] [Accepted: 04/24/2017] [Indexed: 01/05/2023]
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Rosshandler Y, Shen AQ, Cortes J, Khoury HJ. Omacetaxine Mepesuccinate for Chronic Myeloid Leukemia. Expert Rev Hematol 2016; 9:419-24. [PMID: 26853281 DOI: 10.1586/17474086.2016.1151351] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Omacetaxine mepesuccinate is approved by the Food and Drug Administration in the United States for the treatment of chronic myeloid leukemia in chronic or accelerated phase resistant to two or more tyrosine kinase inhibitors. This review summarizes the mode of action, pharmacokinetics, efficacy and safety of omacetaxine mepesuccinate. Omacetaxine mepesuccinate has activity in chronic myeloid leukemia, especially in the chronic phase, regardless of the presence of ABL1 kinase domain mutations. Omacetaxine mepesuccinate has distinct but manageable adverse events profile. Omacetaxine mepesuccinate is a treatment option for a subset of patients with refractory chronic myeloid leukemia.
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Affiliation(s)
- Yasmin Rosshandler
- a Department of Hematology and Medical Oncology , the Winship Cancer Institute of Emory University, Emory University School of Medicine , Atlanta , GA , USA
| | - Ann Q Shen
- a Department of Hematology and Medical Oncology , the Winship Cancer Institute of Emory University, Emory University School of Medicine , Atlanta , GA , USA
| | - Jorge Cortes
- b Department of Leukemia , the University of Texas M.D. Anderson Cancer Center , Houston , TX , USA
| | - Hanna Jean Khoury
- a Department of Hematology and Medical Oncology , the Winship Cancer Institute of Emory University, Emory University School of Medicine , Atlanta , GA , USA
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24
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Xiao F, Li Y, Xu W, You L, Yang C, Liu H, Qian W. Efficacy and safety of homoharringtonine plus cytarabine and aclarubicin for patients with myelodysplastic syndrome-RAEB. Oncol Lett 2015; 11:355-359. [PMID: 26870217 DOI: 10.3892/ol.2015.3876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 10/15/2015] [Indexed: 01/11/2023] Open
Abstract
The aim of the present study was to evaluate the treatment outcome of homoharringtonine, cytarabine (AraC) and aclarubicin combination therapy as induction treatment for myelodysplastic syndromes-refractory anemia with excess blasts (MDS-RAEB). A total of 24 patients with MDS-RAEB who were aged between 18 and 66 years were treated with homoharringtonine, AraC and aclarubicin (HAA regimen). The HAA regimen consisted of homoharringtonine (2 mg/m2 intramuscularly twice daily, days 1-3), AraC (75 mg/m2 injected subcutaneously twice daily, days 1-7) and aclarubicin (12 mg/m2, days 1-7). The overall response rate was 79% with a complete remission rate of 58.3% and partial remission rate of 20.7%. There was no evidence of early mortality in this group of patients. The median overall survival (OS) was 36.2 months (95% confidence interval, 24.6-47.4 months), and the estimated three year overall survival rate was 45.8%. In conclusion, HAA combination therapy is a suitable induction regimen for patients with MDS-RAEB, which may improve the outcome for de novo higher-risk MDS patients, particularly of those with favorable and intermediate cytogenetics.
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Affiliation(s)
- Feng Xiao
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Ying Li
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Weilai Xu
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Liangshun You
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Chunmei Yang
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Hui Liu
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
| | - Wenbin Qian
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
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Lee HE, Nam JS, Shin JA, Hong IS, Yang IH, You MJ, Cho SD. Convallaria keiskei as a novel therapeutic alternative for salivary gland cancer treatment by targeting myeloid cell leukemia-1. Head Neck 2015; 38 Suppl 1:E761-70. [PMID: 25914292 DOI: 10.1002/hed.24096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2015] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Various chemotherapeutic agents have been used largely for the treatment of salivary gland cancer. However, results are disappointing, and these agents can cause some serious side effects. Therefore, recent studies have focused on the possible roles of natural products to overcome these limitations. METHODS Salivary gland cancer cells treated with or without Convallaria keiskei (MECK) for 24 hours. Apoptotic changes were evaluated by live/dead assay, immunoblotting, and expression levels of caspase-3 and B-cell lymphoma-2 family member. RESULTS MECK significantly inhibited salivary gland cancer growth. At the molecular level, MECK dramatically reduced myeloid cell leukemia-1 (Mcl-1) in a translation-dependent manner and thereby induced apoptosis through Bax/Bid. Furthermore, we found that Mcl-1 could be a potential therapeutic target of MECK-induced apoptosis and its stability is regulated by extracellular signal-regulated kinases 1/2 (ERK1/2) signaling CONCLUSION MECK can be used as a safe and efficient therapeutic alternative for the treatment of salivary gland cancer. © 2015 Wiley Periodicals, Inc. Head Neck 38: E761-E770, 2016.
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Affiliation(s)
- Haeng-Eun Lee
- Department of Oral Pathology, School of Dentistry and Institute of Biodegradable Material, Institute of Oral Bioscience, Brain Korea 21 Project, Chonbuk National University, Jeonju, Republic of Korea
| | - Jeong-Seok Nam
- Laboratory of Tumor Suppressor, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, South Korea.,Department of Molecular Medicine, School of Medicine, Gachon University, Incheon, South Korea
| | - Ji-Ae Shin
- Department of Oral Pathology, School of Dentistry and Institute of Biodegradable Material, Institute of Oral Bioscience, Brain Korea 21 Project, Chonbuk National University, Jeonju, Republic of Korea
| | - In-Sun Hong
- Laboratory of Tumor Suppressor, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, South Korea.,Department of Molecular Medicine, School of Medicine, Gachon University, Incheon, South Korea
| | - In-Hyoung Yang
- Department of Oral Pathology, School of Dentistry and Institute of Biodegradable Material, Institute of Oral Bioscience, Brain Korea 21 Project, Chonbuk National University, Jeonju, Republic of Korea
| | - Myung-Jo You
- Laboratory of Veterinary Parasitology, College of Veterinary Medicine and Bio-Safety Research Centre, Chonbuk National University, Jeonju, Republic of Korea
| | - Sung-Dae Cho
- Department of Oral Pathology, School of Dentistry and Institute of Biodegradable Material, Institute of Oral Bioscience, Brain Korea 21 Project, Chonbuk National University, Jeonju, Republic of Korea
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Zhou X, Xu N, Li R, Xiao Y, Gao G, Lu Q, Ding L, Li L, Li Y, Du Q, Liu X. A comparative proteomic study of Homoharringtonine-induced apoptosis in leukemia K562 cells. Leuk Lymphoma 2015; 56:2162-9. [PMID: 25330443 DOI: 10.3109/10428194.2014.976818] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The objective of this study was to determine the changes in protein profiles of K562 chronic myeloid leukemia (CML) cells in response to Homoharringtonine (HHT). HHT treatment significantly increased apoptosis of K562 cells. Proteomic analyses indicated 32 differentially expressed proteins, 13 of which were identified by mass spectrometry (nine down-regulated and four up-regulated). Aside from alterations in apoptotic proteins and proteins associated with transcription and translation, our data also revealed changes in oxidative stress response and redox reaction-related proteins, such as heat shock proteins (Hsps), DJ-1 and thioredoxin. Specifically, these proteins were validated to decrease after HHT treatment in K562 cells and in primary CML cells by immunoblot analysis. Additionally, Hsps, DJ-1 and thioredoxin, which were also shown to decrease in primary cells from imatinib-resistant patients, may be promising potential targets for mechanistic research and new clinical treatments.
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Watari A, Hashegawa M, Yagi K, Kondoh M. Homoharringtonine increases intestinal epithelial permeability by modulating specific claudin isoforms in Caco-2 cell monolayers. Eur J Pharm Biopharm 2014; 89:232-8. [PMID: 25513955 DOI: 10.1016/j.ejpb.2014.12.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/29/2014] [Accepted: 12/08/2014] [Indexed: 10/24/2022]
Abstract
Homoharringtonine (HHT), a natural alkaloid produced by various Cephalotaxus species, has antileukemic activity in acute and chronic myelogenous leukemia. However, HHT can also induce unanticipated effects in the gastrointestinal tract, such as diarrhea and nausea/vomiting, but the mechanism behind these adverse effects has not been clarified. In the present study, we show that HHT affects the epithelial permeability of intestinal Caco-2 cell monolayers. HHT reduced the transepithelial electrical resistance (TER) of Caco-2 cells in a dose- and time-dependent manner. The HHT effect was reversible and no cytotoxicity was observed at the concentrations used. HHT simultaneously increased the paracellular flux of the 4 kDa and 40 kDa FITC-dextrans associated with the TER reduction. Immunoblotting analysis revealed that HHT decreased the protein expression of TJ components such as claudin-3, -5, and -7. However, the transcription levels of these claudins were not repressed by HHT treatment. HHT also disturbed the cellular localization of claudin-1 and -4. These changes coincided with the reduced barrier function. Our findings suggest that HHT enhances the paracellular permeability of Caco-2 cell monolayers by modulating the protein expression and localization of claudin isoforms; these actions might be responsible for the gastrointestinal effects of HHT.
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Affiliation(s)
- Akihiro Watari
- Laboratory of Bio-Functional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Japan.
| | - Maki Hashegawa
- Laboratory of Bio-Functional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Japan
| | - Kiyohito Yagi
- Laboratory of Bio-Functional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Japan
| | - Masuo Kondoh
- Laboratory of Bio-Functional Molecular Chemistry, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Japan.
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Subcutaneous omacetaxine mepesuccinate in patients with chronic myeloid leukemia in tyrosine kinase inhibitor-resistant patients: Review and perspectives. Leuk Res 2014; 38:1145-53. [DOI: 10.1016/j.leukres.2014.05.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 04/25/2014] [Accepted: 05/03/2014] [Indexed: 11/17/2022]
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Yu HJ, Shin JA, Jung JY, Nam JS, Hong IS, Cho NP, Cho SD. Inhibition of myeloid cell leukemia-1: Association with sorafenib-induced apoptosis in human mucoepidermoid carcinoma cells and tumor xenograft. Head Neck 2014; 37:1326-35. [PMID: 25043125 DOI: 10.1002/hed.23749] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 03/24/2014] [Accepted: 05/07/2014] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The purpose of our study was to investigate the anticancer effect of sorafenib on mucoepidermoid carcinoma (MEC) and find its new molecular mechanism. METHODS The apoptotic effects of sorafenib were performed using MTS assay, diamidino-phenylindole (DAPI) staining, Western blotting, reverse transcription-polymerase chain reaction (RT-PCR), siRNA, and xenograft. RESULTS Sorafenib had apoptotic effects on MC-3 and YD15 cells and decreased myeloid cell leukemia-1 (Mcl-1) through proteasome-dependent protein degradation and the inhibition of protein synthesis. Sorafenib significantly affected truncated bid (t-Bid) and siMcl-1 resulting in the upregulation of t-Bid to induce apoptosis. Signal transducer and activator of transcription 3 (STAT3) phosphorylation was also blocked by sorafenib and a potent STAT3 inhibitor, cryptotanshinone clearly induced poly ADP-ribose polymerase (PARP) cleavage by inhibiting Mcl-1 and increasing t-Bid. Finally, administration of sorafenib significantly suppressed tumor growth and induced apoptosis in tumor xenograft model in association with downregulation of Mcl-1 without any side effects. CONCLUSION Taken together, these findings suggest that sorafenib can be a good anticancer drug candidate for the treatment of MEC.
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Affiliation(s)
- Hyun-Ju Yu
- Department of Oral Pathology, School of Dentistry, and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - Ji-Ae Shin
- Department of Oral Pathology, School of Dentistry, and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - Ji-Youn Jung
- Department of Companion and Laboratory Animal Science, Kongju National University, Yesan, Republic of Korea
| | - Jeong-Seok Nam
- Lee Gil Ya Cancer and Diabetes Institute, Inchon, Republic of Korea
| | - In-Sun Hong
- Department of Molecular Medicine, Gachon University, Incheon, Republic of Korea
| | - Nam-Pyo Cho
- Department of Oral Pathology, School of Dentistry, and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
| | - Sung-Dae Cho
- Department of Oral Pathology, School of Dentistry, and Institute of Oral Bioscience, Chonbuk National University, Jeonju, Republic of Korea
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Synthetic approaches to the 2012 new drugs. Bioorg Med Chem 2014; 22:2005-32. [DOI: 10.1016/j.bmc.2014.02.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 02/11/2014] [Accepted: 02/13/2014] [Indexed: 12/19/2022]
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Chen Y, Li S. Omacetaxine mepesuccinate in the treatment of intractable chronic myeloid leukemia. Onco Targets Ther 2014; 7:177-86. [PMID: 24516334 PMCID: PMC3916637 DOI: 10.2147/ott.s41786] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
In a significant proportion of patients with chronic myeloid leukemia, resistance to BCR-ABL tyrosine kinase inhibitors develops due to acquisition of BCR-ABL kinase domain mutations and insensitivity of leukemia stem cells to tyrosine kinase inhibitors. Omacetaxine mepesuccinate (formerly called homoharringtonine) is a natural alkaloid that inhibits protein synthesis and induces cell death. Omacetaxine mepesuccinate has been recently approved by the US Food and Drug Administration to treat patients with chronic myeloid leukemia who failed to respond to multiple tyrosine kinase inhibitors and/or acquired the BCR-ABL-T315I mutation. In this review, we discuss the use and effectiveness of omacetaxine mepesuccinate in the treatment of chronic myeloid leukemia, with coverage of its pharmacology, mode of action, and pharmacokinetics. We believe that omacetaxine mepesuccinate will be beneficial to many patients with chronic myeloid leukemia who do not respond well to tyrosine kinase inhibitors.
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Affiliation(s)
- Yaoyu Chen
- Department of Oncology, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - Shaoguang Li
- Division of Hematology/Oncology, Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
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Lü S, Wang J. Homoharringtonine and omacetaxine for myeloid hematological malignancies. J Hematol Oncol 2014; 7:2. [PMID: 24387717 PMCID: PMC3884015 DOI: 10.1186/1756-8722-7-2] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 12/26/2013] [Indexed: 01/16/2023] Open
Abstract
Homoharringtonine (HHT), a plant alkaloid with antitumor properties originally identified nearly 40 years ago, has a unique mechanism of action by preventing the initial elongation step of protein synthesis. HHT has been used widely in China for the treatment of chronic myeloid leukemia (CML), acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). Omacetaxine, a semisynthetic form of HHT, with excellent bioavailability by the subcutaneous route, has recently been approved by FDA of the United States for the treatment of CML refractory to tyrosine kinase inhibitors. This review summarized preclinical and clinical development of HHT and omacetaxine for myeloid hematological malignancies.
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Affiliation(s)
| | - Jianmin Wang
- Department of Hematology, Changhai Hospital, Second Military Medical University, 168 Changhai Road, Shanghai 200433, China.
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Nazha A, Kantarjian H, Cortes J, Quintás-Cardama A. Omacetaxine mepesuccinate (synribo) - newly launched in chronic myeloid leukemia. Expert Opin Pharmacother 2013; 14:1977-86. [PMID: 23875628 DOI: 10.1517/14656566.2013.821464] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Omacetaxine mepesuccinate (formerly known as homoharringtonine [HHT]) is a natural alkaloid with significant anticancer activity partly through inhibition of protein synthesis and induction of apoptosis. Prior to the development of tyrosine kinase inhibitors (TKIs), HHT was the most active therapy in chronic myeloid leukemia (CML) after interferon failure. Subsequent trials showed that HHT and omacetaxine are active in patients failing several TKIs or carrying the T315I mutation. AREAS COVERED This review will discuss the preclinical development of HHT and omacetaxine mepesuccinate in CML and the clinical studies leading to its approval by the Food and Drug Administration (FDA). EXPERT OPINION A sizable number of patients with CML will develop TKI resistance, frequently through the acquisition of BCR-ABL1 kinase domain mutations. Omacetaxine is active in patients with CML after failure to multiple TKIs and in those carrying the T315I mutation, which is highly resistant to all FDA-approved TKIs except for ponatinib. Both ponatinib and omacetaxine have been recently approved by the FDA and represent useful treatment options for patients with CML who failed several TKIs and/or acquired the T315I mutation. The development of an oral formulation of omacetaxine would greatly facilitate its use and provide an attractive option for TKI-based combinatorial strategies.
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Affiliation(s)
- Aziz Nazha
- The University of Texas, M.D. Anderson Cancer Center, Department of Leukemia Unit , 428, 1515 Holcombe Blvd, Houston, TX 77030 , USA +1 713 745 4009 ;
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Nicolini FE, Khoury HJ, Akard L, Rea D, Kantarjian H, Baccarani M, Leonoudakis J, Craig A, Benichou AC, Cortes J. Omacetaxine mepesuccinate for patients with accelerated phase chronic myeloid leukemia with resistance or intolerance to two or more tyrosine kinase inhibitors. Haematologica 2013; 98:e78-9. [PMID: 23753022 DOI: 10.3324/haematol.2012.083006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
MESH Headings
- Antineoplastic Agents, Phytogenic/pharmacology
- Antineoplastic Agents, Phytogenic/therapeutic use
- Drug Resistance, Neoplasm/drug effects
- Drug Resistance, Neoplasm/physiology
- Follow-Up Studies
- Harringtonines/pharmacology
- Harringtonines/therapeutic use
- Homoharringtonine
- Humans
- Leukemia, Myeloid, Accelerated Phase/drug therapy
- Leukemia, Myeloid, Accelerated Phase/enzymology
- Leukemia, Myeloid, Accelerated Phase/mortality
- Protein Kinase Inhibitors/pharmacology
- Protein Kinase Inhibitors/therapeutic use
- Protein-Tyrosine Kinases/antagonists & inhibitors
- Protein-Tyrosine Kinases/metabolism
- Survival Rate/trends
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Cortes J, Digumarti R, Parikh P, Wetzler M, Lipton J, Hochhaus A, Craig A, Benichou AC, Nicolini F, Kantarjian H. Phase 2 study of subcutaneous omacetaxine mepesuccinate for chronic-phase chronic myeloid leukemia patients resistant to or intolerant of tyrosine kinase inhibitors. Am J Hematol 2013; 88:350-4. [PMID: 23468307 DOI: 10.1002/ajh.23408] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 01/28/2013] [Indexed: 02/04/2023]
Abstract
Omacetaxine mepesuccinate (omacetaxine) is a first-in-class cephalotaxine with a unique mode of action, independent of BCR-ABL, that has shown promising activity in patients with chronic myeloid leukemia (CML). This multicenter, noncomparative, open-label phase 2 study evaluated the efficacy and safety of subcutaneous omacetaxine in CML patients with resistance or intolerance to two or more tyrosine kinase inhibitors (TKIs); results in patients in chronic phase are reported here. Patients received subcutaneous omacetaxine 1.25 mg/m² twice daily days 1-14 every 28 days until hematologic response (up to a maximum of six cycles), then days 1-7 every 28 days as maintenance. Primary endpoints were rates of hematologic response lasting >8 weeks and major cytogenetic response (MCyR). Forty-six patients were enrolled: all had received imatinib, 83% had received dasatinib, and 57% nilotinib. A median 4.5 cycles of omacetaxine were administered (range, 1-36). Hematologic response was achieved or maintained in 31 patients (67%); median response duration was 7.0 months. Ten patients (22%) achieved MCyR, including 2 (4%) complete cytogenetic responses. Median progression-free survival was 7.0 months [95% confidence interval (CI), 5.9-8.9 months], and overall survival was 30.1 months (95% CI, 20.3 months-not reached). Grade 3/4 hematologic toxicity included thrombocytopenia (54%), neutropenia (48%), and anemia (33%). Nonhematologic adverse events were predominantly grade 1/2 and included diarrhea (44%), nausea (30%), fatigue (24%), pyrexia (20%), headache (20%), and asthenia (20%). Subcutaneous omacetaxine may offer clinical benefit to patients with chronic-phase CML with resistance or intolerance to multiple TKI therapies.
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Affiliation(s)
- J. Cortes
- Department of Leukemia; UT MD Anderson Cancer Center; Houston; Texas
| | - R. Digumarti
- Medical Oncology, Nizam's Institute of Medical Sciences; Hyderabad; India
| | - P.M. Parikh
- Indian Cooperative Oncology Network; Mumbai; India
| | - M. Wetzler
- Division of Leukemia, Roswell Park Cancer Institute; Buffalo; New York
| | - J.H. Lipton
- Chronic Myelogenous Leukemia Group, Department of Hematology/Medical Oncology, Princess Margaret Hospital; Toronto; Ontario; Canada
| | - A. Hochhaus
- Abteilung Hðmatologie/Onkologie, Klinik für Innere Medizin II; Universitätsklinikum Jena; Jena; Germany
| | - A.R. Craig
- Formerly of ChemGenex Pharmaceuticals; an indirect wholly owned subsidiary of Teva Pharmaceuticals; Petach Tikva; Israel
| | - A.-C. Benichou
- Formerly of ChemGenex Pharmaceuticals; an indirect wholly owned subsidiary of Teva Pharmaceuticals; Petach Tikva; Israel
| | - F.E. Nicolini
- Hematologie Clinique, Centre Hospitalier Lyon Sud; Pierre Bénite; France
| | - H.M. Kantarjian
- Department of Leukemia; UT MD Anderson Cancer Center; Houston; Texas
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Lindqvist LM, Vikström I, Chambers JM, McArthur K, Ann Anderson M, Henley KJ, Happo L, Cluse L, Johnstone RW, Roberts AW, Kile BT, Croker BA, Burns CJ, Rizzacasa MA, Strasser A, Huang DCS. Translation inhibitors induce cell death by multiple mechanisms and Mcl-1 reduction is only a minor contributor. Cell Death Dis 2012; 3:e409. [PMID: 23059828 PMCID: PMC3481137 DOI: 10.1038/cddis.2012.149] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
There is significant interest in treating cancers by blocking protein synthesis, to which hematological malignancies seem particularly sensitive. The translation elongation inhibitor homoharringtonine (Omacetaxine mepesuccinate) is undergoing clinical trials for chronic myeloid leukemia, whereas the translation initiation inhibitor silvestrol has shown promise in mouse models of cancer. Precisely how these compounds induce cell death is unclear, but reduction in Mcl-1, a labile pro-survival Bcl-2 family member, has been proposed to constitute the critical event. Moreover, the contribution of translation inhibitors to neutropenia and lymphopenia has not been precisely defined. Herein, we demonstrate that primary B cells and neutrophils are highly sensitive to translation inhibitors, which trigger the Bax/Bak-mediated apoptotic pathway. However, contrary to expectations, reduction of Mcl-1 did not significantly enhance cytotoxicity of these compounds, suggesting that it does not have a principal role and cautions that strong correlations do not always signify causality. On the other hand, the killing of T lymphocytes was less dependent on Bax and Bak, indicating that translation inhibitors can also induce cell death via alternative mechanisms. Indeed, loss of clonogenic survival proved to be independent of the Bax/Bak-mediated apoptosis altogether. Our findings warn of potential toxicity as these translation inhibitors are cytotoxic to many differentiated non-cycling cells.
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Affiliation(s)
- L M Lindqvist
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.
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Shimura Y, Kuroda J, Ri M, Nagoshi H, Yamamoto-Sugitani M, Kobayashi T, Kiyota M, Nakayama R, Mizutani S, Chinen Y, Sakamoto N, Matsumoto Y, Horiike S, Shiotsu Y, Iida S, Taniwaki M. RSK2(Ser227) at N-terminal kinase domain is a potential therapeutic target for multiple myeloma. Mol Cancer Ther 2012; 11:2600-9. [PMID: 23012246 DOI: 10.1158/1535-7163.mct-12-0605] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Multiple myeloma is an entity of cytogenetically and genetically heterogenous plasma cell neoplasms. Despite recent improvement in the treatment outcome of multiple myeloma by novel molecular-targeted chemotherapeutics, multiple myeloma remains incurable. The identification of a therapeutic target molecule in which various signaling for cell-survival converge is a core component for the development of new therapeutic strategies against multiple myeloma. RSK2 is an essential mediator of the ERK1/2 signaling pathway for cell survival and proliferation. In this study, we discovered that RSK2(Ser227), which is located at the N-terminal kinase domain and is one site responsible for substrate phosphorylation, is activated through phosphorylation regardless of the type of cytogenetic abnormalities or upstream molecular signaling in all 12 multiple myeloma-derived cell lines examined and 6 of 9 patient-derived CD138-positive primary myeloma cells. The chemical inhibition of RSK2(Ser227) by BI-D1870 or gene knockdown of RSK2 inhibits myeloma cell proliferation through apoptosis induction, and this anti-myeloma effect was accompanied by downregulation of c-MYC, cyclin D, p21(WAF1/CIP1), and MCL1. RSK2(Ser227) inhibition resulting from BI-D1870 treatment restored lenalidomide-induced direct cytotoxicity of myeloma cells from interleukin-6-mediated cell protection, showed no cross-resistance to bortezomib, and exerted additive/synergistic antiproliferative effects in conjunction with the mTOR, histone deacetylase, and BH3-mimicking BCL2/BCLX(L) inhibitors. These results suggest that RSK2(Ser227) is a potential therapeutic target not only for newly diagnosed but also for patients with later phase multiple myeloma who are resistant or refractory to currently available anti-myeloma therapies.
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Affiliation(s)
- Yuji Shimura
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Phase 2 study of subcutaneous omacetaxine mepesuccinate after TKI failure in patients with chronic-phase CML with T315I mutation. Blood 2012; 120:2573-80. [PMID: 22896000 DOI: 10.1182/blood-2012-03-415307] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Chronic myeloid leukemia (CML) patients with the BCR-ABL T315I mutation do not benefit from therapy with currently approved tyrosine kinase inhibitors. Omacetaxine mepesuccinate is a protein synthesis inhibitor that has demonstrated activity in cells harboring the T315I mutation. This phase 2 trial assessed the efficacy of omacetaxine in CML patients with T315I and tyrosine kinase inhibitor failure. Patients received subcutaneous omacetaxine 1.25 mg/m(2) twice daily, days 1-14, every 28 days until hematologic response or a maximum of 6 cycles, and then days 1-7 every 28 days as maintenance. Results for patients treated in chronic phase are reported here. Patients (n = 62) received a median of 7 (range, 1-41) cycles. Complete hematologic response was achieved in 48 patients (77%; 95% lower confidence limit, 65%); median response duration was 9.1 months. Fourteen patients (23%; 95% lower confidence limit, 13%) achieved major cytogenetic response, including complete cytogenetic response in 10 (16%). Median progression free-survival was 7.7 months. Grade 3/4 hematologic toxicity included thrombocytopenia (76%), neutropenia (44%), and anemia (39%) and was typically manageable by dose reduction. Nonhematologic adverse events were mostly grade 1/2 and included infection (42%), diarrhea (40%), and nausea (34%). Omacetaxine may provide a safe and effective treatment for CML patients with T315I mutation. This study is registered at www.clinicaltrials.gov as NCT00375219.
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Kim TD, Frick M, le Coutre P. Omacetaxine mepesuccinate for the treatment of leukemia. Expert Opin Pharmacother 2012; 12:2381-92. [PMID: 21916787 DOI: 10.1517/14656566.2011.613378] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
INTRODUCTION Omacetaxine mepesuccinate, formerly known as homoharringtonine, is a first-in-class cephalotaxine that has experienced phases of increasing and waning interest since its first use in traditional Chinese medicine. With activity being reported in patients with chronic myeloid leukemia (CML) resistant to currently available tyrosine kinase inhibitors, renewed interest has recently been generated. AREAS COVERED The development of omacetaxine mepesuccinate, with emphasis on synthesis and mode of administration, is addressed. An overview on current clinical results as a single agent or within combination regimens in patients with acute myeloid leukemia (AML) and CML is given. EXPERT OPINION Omacetaxine mepesuccinate has a unique mode of action and appreciable activity in AML and CML with generally mild nonhematologic toxicity. In patients with AML, results indicate a role within combination regimens in selected, possibly elderly patient populations. In CML, patients with resistance to tyrosine kinase inhibitors, especially due to the T315I mutation, are the most intensively studied. Despite successful results in some patients, single-agent therapy with omacetaxine mepesuccinate has resulted in modest results. However, upfront combination with tyrosine kinase inhibitor represents an attractive option due their differing mechanisms of action.
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Affiliation(s)
- Theo Daniel Kim
- Medizinische Klinik m.S. Hämatologie und Onkologie, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353 Berlin, Germany.
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Abdelkafi H, Nay B. Natural products from Cephalotaxus sp.: chemical diversity and synthetic aspects. Nat Prod Rep 2012; 29:845-69. [DOI: 10.1039/c2np20037f] [Citation(s) in RCA: 140] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yin S, Wang R, Zhou F, Zhang H, Jing Y. Bcl-xL is a dominant antiapoptotic protein that inhibits homoharringtonine-induced apoptosis in leukemia cells. Mol Pharmacol 2011; 79:1072-83. [PMID: 21415308 DOI: 10.1124/mol.110.068528] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Homoharringtonine (HHT) has been reported to be effective in a portion of patients with acute myeloid leukemia (AML) or chronic myeloid leukemia (CML). To investigate its mechanism of action, cell growth inhibition and cytotoxicity of HHT were investigated in three AML cell lines, HL-60, NB4, and U937, and in three CML cell lines, K562, KU812, and KCL22. AML cells were more sensitive than CML cells to HHT-induced cytotoxicity. Using HL-60 cells, it was revealed that HHT decreased the levels of myeloid cell leukemia 1 (Mcl-1), X-linked inhibitor of apoptosis protein (XIAP), survivin, and B-cell lymphoma 2 (Bcl-2)-homology domain 3 (BH3)-only proteins as well as the mitochondrial membrane potential. The levels of Bcl-2, Bcl-2-associated X protein (Bax), and Bcl-2 homologous antagonist/killer (Bak) proteins in HL-60 cells were not changed after HHT treatment. U937, K562, KU812, and KCL22 cells expressed B-cell lymphoma-extra large (Bcl-xL) and were less responsive to HHT-induced apoptosis than HL-60 cells. Silencing Mcl-1 or Bcl-xL, but not XIAP or survivin, enhanced HHT-induced apoptosis in U937 cells. The levels of HHT-induced apoptosis in K562, KCL22, and KU812 cells were inversely correlated with the levels of Bcl-xL but not those of Bcl-2 or Mcl-1. K562 cells expressing high levels of Bcl-xL but no Bcl-2 were less responsive to HHT-induced apoptosis than KCL22 cells that expressed lower levels of Bcl-xL and higher levels of Bcl-2 protein. In K562 cells, knockdown of Bcl-xL, but not of Mcl-1, enhanced HHT-induced apoptosis. Transfection of Bcl-xL into KCL22 cells attenuated HHT-induced apoptosis. These data suggest that Bcl-xL plays a more important role than Bcl-2 and Mcl-1 in protecting against HHT-induced apoptosis.
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Affiliation(s)
- Shiliang Yin
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
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Choi KH, Shim JH, Huong LD, Cho NP, Cho SD. Inhibition of myeloid cell leukemia-1 by tolfenamic acid induces apoptosis in mucoepidermoid carcinoma. Oral Dis 2010; 17:469-75. [DOI: 10.1111/j.1601-0825.2010.01774.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Galectin-9 exhibits anti-myeloma activity through JNK and p38 MAP kinase pathways. Leukemia 2010; 24:843-50. [PMID: 20200560 DOI: 10.1038/leu.2010.25] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Galectins constitute a family of lectins that specifically exhibit the affinity for beta-galactosides and modulate various biological events. Galectin-9 is a tandem-repeat type galectin with two carbohydrate recognition domains and has recently been shown to have an anti-proliferative effect on cancer cells. We investigated the effect of recombinant protease-resistant galectin-9 (hGal9) on multiple myeloma (MM). In vitro, hGal9 inhibited the cell proliferation of five myeloma cell lines examined, including a bortezomib-resistant subcell line, with IC(50) between 75.1 and 280.0 nM, and this effect was mediated by the induction of apoptosis with the activation of caspase-8, -9, and -3. hGal9-activated Jun NH(2)-terminal kinase (JNK) and p38 MAPK signaling pathways followed by H2AX phosphorylation. Importantly, the inhibition of either JNK or p38 MAPK partly inhibited the anti-proliferative effect of hGal9, indicating the crucial role of these pathways in the anti-MM effect of hGal9. hGal9 also induced cell death in patient-derived myeloma cells, some with poor-risk factors, such as chromosomal deletion of 13q or translocation t(4;14)(p16;q32). Finally, hGal9 potently inhibited the growth of human myeloma cells xenografted in nude mice. These suggest that hGal9 is a new therapeutic target for MM that may overcome resistance to conventional chemotherapy.
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Jin Y, Lu Z, Cao K, Zhu Y, Chen Q, Zhu F, Qian C, Pan J. The antitumor activity of homoharringtonine against human mast cells harboring the KIT D816V mutation. Mol Cancer Ther 2010; 9:211-23. [PMID: 20053766 DOI: 10.1158/1535-7163.mct-09-0468] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Gain-of-function mutations of the receptor tyrosine kinase KIT play a critical role in the pathogenesis of systemic mastocytosis (SM) and gastrointestinal stromal tumors. The various juxtamembrane type of KIT mutations, including V560G, are found in 60% to 70% of patients with gastrointestinal stromal tumors; loop mutant D816V, which exists in approximately 80% of SM patients, is completely resistant to imatinib. In the present study, we hypothesized that homoharringtonine (HHT), a protein synthesis inhibitor, would decrease the level of KIT protein by inhibiting translation, resulting in a decreased level of phospho-KIT and abrogating its constitutive downstream signaling. Imatinib-sensitive HMC-1.1 cells harboring the mutation V560G in the juxtamembrane domain of KIT, imatinib-resistant HMC-1.2 cells harboring both V560G and D816V mutations, and murine P815 cells were treated with HHT and analyzed in terms of growth, apoptosis, and signal transduction. The in vivo antitumor activity was evaluated by using the murine mast cell leukemia model. Our results indicated that HHT effectively inhibited the growth and induced apoptosis in cells bearing both V560G and D816V or D814Y KIT. Additionally, HHT inhibited the KIT-dependent phosphorylation of downstream signaling molecules Akt, signal transducer and activator of transcription 3 and 5, and extracellular signal-regulated kinase 1/2. Furthermore, HHT significantly prolonged the survival duration of mice with aggressive SM or mast cell leukemia by inhibiting the expansion and infiltration of imatinib-resistant mast tumor cells harboring imatinib-resistant D814Y KIT. Collectively, we show that HHT circumvents D816V KIT-elicited imatinib resistance. Our findings warrant a clinical trial of HHT in patients with SM harboring D816V or D814Y KIT.
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Affiliation(s)
- Yanli Jin
- Department of Pathophysiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, People's Republic of China
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Quintás-Cardama A, Kantarjian H, Cortes J. Homoharringtonine, omacetaxine mepesuccinate, and chronic myeloid leukemia circa 2009. Cancer 2009; 115:5382-93. [PMID: 19739234 DOI: 10.1002/cncr.24601] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Homoharringtonine (HHT) is a natural alkaloid that is obtained from various Cephalotaxus species. The mechanism of action by which HHT exerts its antitumor activity is through inhibition of protein synthesis and promotion of apoptosis. In the 1990s, HHT proved to be significantly active as salvage therapy for patients with chronic myeloid leukemia (CML) after failure on interferon-alpha therapy. However, the remarkable success of imatinib mesylate in the treatment of CML relegated HHT to oblivion. The development of omacetaxine mepesuccinate, a subcutaneously bioavailable semisynthetic form of HHT, and its activity in imatinib-resistant CML has established this agent for the second time as a valuable option in the management of this disease. Preliminary results appear to support the use of this agent for patients who have imatinib-resistant CML, including those who carry the tyrosine kinase inhibitor-insensitive mutation that exchanges the amino acids threonine and isoleucine at position 315 (the T315I mutation). In this article, the authors discuss the current data on omacetaxine and the prospects of this agent to be integrated into the state-of-the-art treatment algorithms for CML.
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Affiliation(s)
- Alfonso Quintás-Cardama
- Department of Leukemia, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
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Kuroda J, Taniwaki M. Involvement of BH3-only proteins in hematologic malignancies. Crit Rev Oncol Hematol 2008; 71:89-101. [PMID: 19022681 DOI: 10.1016/j.critrevonc.2008.10.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2008] [Revised: 09/18/2008] [Accepted: 10/09/2008] [Indexed: 12/25/2022] Open
Abstract
The interaction between anti-apoptotic and pro-apoptotic members of the Bcl-2 family proteins determines life or death for cancer cells. In this context, BH3-only proteins (such as Bim), members of the pro-apoptotic Bcl-2 family proteins, act as key initiators of apoptosis by activating Bax and Bak through liberating them from anti-apoptotic Bcl-2 members. This then leads to the disruption of mitochondrial outer membrane, and eventually promotes proteolytic cascades for cellular dismantling. We here review the growing evidence of how BH3-only proteins are involved in tumorigenesis and in apoptosis induced by anti-cancer agents in hematologic malignancies. A deeper understanding of the roles of BH3-only proteins in cell death regulation may yield crucial insights for the further development of more effective and rational cell killing strategies. Recent developments in the direct therapeutic manipulation of Bcl-2 proteins using BH3-mimicking agents, such as ABT-737 or GX15-070, for hematologic malignancies are also summarized.
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Affiliation(s)
- Junya Kuroda
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-ku, Kyoto 602-8566, Japan.
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