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Zhang N, Prasad S, Huyghues Despointes CE, Young J, Kima PE. Leishmania parasitophorous vacuole membranes display phosphoinositides that create conditions for continuous Akt activation and a target for miltefosine in Leishmania infections. Cell Microbiol 2018; 20:e12889. [PMID: 29993167 DOI: 10.1111/cmi.12889] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 06/22/2018] [Accepted: 06/25/2018] [Indexed: 12/13/2022]
Abstract
Miltefosine is an important drug for the treatment of leishmaniasis; however, its mechanism of action is still poorly understood. In these studies, we tested the hypothesis that like in cancer cells, miltefosine's efficacy in leishmaniasis is due to its inhibition of Akt activation in host cells. We show using pharmacologic agents that block Akt activation by different mechanisms and also using an inducible knockdown approach that miltefosine loses its efficacy when its access to Akt1 is limited. Interestingly, limitation of Akt activation results in clearance of established Leishmania infections. We then show, using fluorophore-tagged probes that bind to phosphoinositides, that Leishmania parasitophorous vacuole membranes (LPVMs) display the relevant phosphoinositides to which Akt can be recruited and activated continuously. Taken together, we propose that the acquisition of PI(4) P and the display of PI (3,4)P2 on LPVMs initiate the machinery that supports continuous Akt activation and sensitivity to miltefosine.
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Affiliation(s)
- Naixin Zhang
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA
| | - Samiksha Prasad
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA
| | | | - Jeffrey Young
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA
| | - Peter E Kima
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA
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Ramello MC, Haura EB, Abate-Daga D. CAR-T cells and combination therapies: What's next in the immunotherapy revolution? Pharmacol Res 2017; 129:194-203. [PMID: 29203440 DOI: 10.1016/j.phrs.2017.11.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 12/13/2022]
Abstract
Cancer immunotherapies are dramatically reshaping the clinical management of oncologic patients. For many of these therapies, the guidelines for administration, monitoring, and management of associated toxicities are still being established. This is especially relevant for adoptively transferred, genetically-modified T cells, which have unique pharmacokinetic properties, due to their ability to replicate and persist long-term, following a single administration. Furthermore, in the case of CAR-T cells, the use of synthetic immune receptors may impact signaling pathways involved in T cell function and survival in unexpected ways. We, herein, comment on the most salient aspects of CAR-T cell design and clinical experience in the treatment of solid tumors. In addition, we discuss different possible scenarios for combinations of CAR-T cells and other treatment modalities, with a special emphasis on kinase inhibitors, elaborating on the strategies to maximize synergism. Finally, we discuss some of the technologies that are available to explore the molecular events governing the success of these therapies. The young fields of synthetic and systems biology are likely to be major players in the advancement of CAR-T cell therapies, providing the tools and the knowledge to engineer patients' T lymphocytes into intelligent cancer-fighting micromachines.
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Affiliation(s)
- Maria C Ramello
- Dept. of Immunology, H. Lee Moffitt Cancer Center and Research Institute. Tampa, FL, United States
| | - Eric B Haura
- Dept. of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, United States
| | - Daniel Abate-Daga
- Dept. of Immunology, H. Lee Moffitt Cancer Center and Research Institute. Tampa, FL, United States; Dept. of Cutaneous Oncology, H. Lee Moffitt Cancer Center and Research Institute, United States; Dept. of Oncological Sciences, Morsani School of Medicine, University of South Florida, United States
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Becher OJ, Millard NE, Modak S, Kushner BH, Haque S, Spasojevic I, Trippett TM, Gilheeney SW, Khakoo Y, Lyden DC, De Braganca KC, Kolesar JM, Huse JT, Kramer K, Cheung NKV, Dunkel IJ. A phase I study of single-agent perifosine for recurrent or refractory pediatric CNS and solid tumors. PLoS One 2017; 12:e0178593. [PMID: 28582410 PMCID: PMC5459446 DOI: 10.1371/journal.pone.0178593] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 05/13/2017] [Indexed: 12/19/2022] Open
Abstract
The PI3K/Akt/mTOR signaling pathway is aberrantly activated in various pediatric tumors. We conducted a phase I study of the Akt inhibitor perifosine in patients with recurrent/refractory pediatric CNS and solid tumors. This was a standard 3+3 open-label dose-escalation study to assess pharmacokinetics, describe toxicities, and identify the MTD for single-agent perifosine. Five dose levels were investigated, ranging from 25 to 125 mg/m2/day for 28 days per cycle. Twenty-three patients (median age 10 years, range 4-18 years) with CNS tumors (DIPG [n = 3], high-grade glioma [n = 5], medulloblastoma [n = 2], ependymoma [n = 3]), neuroblastoma (n = 8), Wilms tumor (n = 1), and Ewing sarcoma (n = 1) were treated. Only one DLT occurred (grade 4 hyperuricemia at dose level 4). The most common grade 3 or 4 toxicity at least possibly related to perifosine was neutropenia (8.7%), with the remaining grade 3 or 4 toxicities (fatigue, hyperglycemia, fever, hyperuricemia, and catheter-related infection) occurring in one patient each. Pharmacokinetics was dose-saturable at doses above 50 mg/m2/day with significant inter-patient variability, consistent with findings reported in adult studies. One patient with DIPG (dose level 5) and 4 of 5 patients with high-grade glioma (dose levels 2 and 3) experienced stable disease for two months. Five subjects with neuroblastoma (dose levels 1 through 4) achieved stable disease which was prolonged (≥11 months) in three. No objective responses were noted. In conclusion, the use of perifosine was safe and feasible in patients with recurrent/refractory pediatric CNS and solid tumors. An MTD was not defined by the 5 dose levels investigated. Our RP2D is 50 mg/m2/day.
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Affiliation(s)
- Oren J. Becher
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- Department of Pediatrics, Northwestern University, Chicago, Illinois, United States of America
| | - Nathan E. Millard
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Shakeel Modak
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Brian H. Kushner
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Sofia Haque
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- Department of Radiology, Weill Cornell Medical College, New York, New York, United States of America
| | - Ivan Spasojevic
- Department of Medicine, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Tanya M. Trippett
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Stephen W. Gilheeney
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Yasmin Khakoo
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- Departments of Pediatrics, Weill Cornell Medical College, New York, New York, United States of America
| | - David C. Lyden
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- Departments of Pediatrics, Weill Cornell Medical College, New York, New York, United States of America
| | - Kevin C. De Braganca
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Jill M. Kolesar
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Jason T. Huse
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Kim Kramer
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Nai-Kong V. Cheung
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
| | - Ira J. Dunkel
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York, United States of America
- Departments of Pediatrics, Weill Cornell Medical College, New York, New York, United States of America
- * E-mail:
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Gu X, Hua Z, Dong Y, Zhan Y, Zhang X, Tian W, Liu Z, Thiele CJ, Li Z. Proteome and Acetylome Analysis Identifies Novel Pathways and Targets Regulated by Perifosine in Neuroblastoma. Sci Rep 2017; 7:42062. [PMID: 28165023 PMCID: PMC5292702 DOI: 10.1038/srep42062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 01/03/2017] [Indexed: 12/16/2022] Open
Abstract
Perifosine, an Akt inhibitor, has been shown to be effective in controlling neuroblastoma tumor growth. However, studies indicate that in addition to the ability to inhibit Akt, other mechanisms contribute to perifosine’s anti-tumor activity. To gain insight into perifosine anti-tumor activity in neuroblastoma we have studied changes in the proteome and acetylome after perifosine treatment in SK-N-AS neuroblastoma cells using SILAC labeling, affinity enrichment, high-resolution and LC-MS/MS analysis. Bioinformatic analysis indicates that, a total of 5,880 proteins and 3,415 lysine acetylation sites were quantified in SK-N-AS cells and 216 differentially expressed proteins and 115 differentially expressed lysine acetylation sites were obtained. These differentially expressed proteins and lysine acetylated proteins were involved in a number of different biological functions, metabolic pathways and pathophysiological processes. This study details the impact of perifosine on proteome and lysine acetylome in SK-N-AS cells and expands our understanding of the mechanisms of perifosine action in neuroblastoma.
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Affiliation(s)
- Xiao Gu
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Zhongyan Hua
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Yudi Dong
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Yue Zhan
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Xiaowen Zhang
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Wei Tian
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Zhihui Liu
- Cellular &Molecular Biology Section, Pediatric Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, 20892, USA
| | - Carol J Thiele
- Cellular &Molecular Biology Section, Pediatric Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, 20892, USA
| | - Zhijie Li
- Medical Research Center, Shengjing Hospital of China Medical University, Shenyang, 110004, China
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Jiang F, Jin K, Huang S, Bao Q, Shao Z, Hu X, Ye J. Liposomal C6 Ceramide Activates Protein Phosphatase 1 to Inhibit Melanoma Cells. PLoS One 2016; 11:e0159849. [PMID: 27631768 PMCID: PMC5025141 DOI: 10.1371/journal.pone.0159849] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 07/09/2016] [Indexed: 02/02/2023] Open
Abstract
Melanoma is one common skin cancer. In the present study, the potential anti-melanoma activity by a liposomal C6 ceramide was tested in vitro. We showed that the liposomal C6 (ceramide) was cytotoxic and anti-proliferative against a panel of human melanoma cell lines (SK-Mel2, WM-266.4 and A-375 and WM-115). In addition, liposomal C6 induced caspase-dependent apoptotic death in the melanoma cells. Reversely, its cytotoxicity was attenuated by several caspase inhibitors. Intriguingly, liposomal C6 was non-cytotoxic to B10BR mouse melanocytes and primary human melanocytes. Molecularly, liposomal C6 activated protein phosphatase 1 (PP1) to inactivate Akt-mammalian target of rapamycin (mTOR) signaling in melanoma cells. On the other hand, PP1 shRNA knockdown or exogenous expression of constitutively activate Akt1 (CA-Akt1) restored Akt-mTOR activation and significantly attenuated liposomal C6-mediated cytotoxicity and apoptosis in melanoma cells. Our results suggest that liposomal C6 activates PP1 to inhibit melanoma cells.
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Affiliation(s)
- Fangzhen Jiang
- Department of Plastic and Reconstructive Surgery, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Kai Jin
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
- * E-mail:
| | - Shenyu Huang
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Qi Bao
- Department of Plastic and Reconstructive Surgery, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Zheren Shao
- Department of Plastic and Reconstructive Surgery, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Xueqing Hu
- Department of Plastic and Reconstructive Surgery, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
| | - Juan Ye
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, 310009, China
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