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Mukthavaram R, Jiang P, Pastorino S, Nomura N, Lin F, Kesari S. Evaluation of the EMulate Therapeutics Voyager's ultra-low radiofrequency energy in murine model of glioblastoma. Bioelectron Med 2024; 10:10. [PMID: 38594769 PMCID: PMC11005219 DOI: 10.1186/s42234-024-00143-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 02/20/2024] [Indexed: 04/11/2024] Open
Abstract
BACKGROUND Glioblastoma (GBM) presents as an aggressive brain cancer, notorious for its recurrence and resistance to conventional treatments. This study aimed to assess the efficacy of the EMulate Therapeutics Voyager®, a non-invasive, non-thermal, non-ionizing, battery-operated, portable experimental medical device, in treating GBM. Using ultra-low radiofrequency energy (ulRFE) to modulate intracellular activity, previous preliminary results in patients have been encouraging. Now, with a focus on murine models, our investigation seeks to elucidate the device's mechanistic impacts, further optimizing its therapeutic potential and understanding its limitations. METHODS The device employs a silicone over molded coil to deliver oscillating magnetic fields, which are believed to interact with and disrupt cellular targets. These fields are derived from the magnetic fluctuations of solvated molecules. Xenograft and syngeneic murine models were chosen for the study. Mice were injected with U-87 MG or GL261 glioma cells in their flanks and were subsequently treated with one of two ulRFE cognates: A1A, inspired by paclitaxel, or A2, based on murine siRNA targeting CTLA4 + PD1. A separate group of untreated mice was maintained as controls. RESULTS Mice that underwent treatments with either A1A or A2 exhibited significantly reduced tumor sizes when compared to the untreated cohort. CONCLUSION The EMulate Therapeutics Voyager® demonstrates promising potential in inhibiting glioma cells in vivo through its unique ulRFE technology and should be further studied in terms of biological effects in vitro and in vivo.
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Affiliation(s)
- Rajesh Mukthavaram
- Neuro-Oncology Program, Moores Cancer Center, UC San Diego, La Jolla, CA, USA
| | - Pengfei Jiang
- Neuro-Oncology Program, Moores Cancer Center, UC San Diego, La Jolla, CA, USA
| | - Sandra Pastorino
- Neuro-Oncology Program, Moores Cancer Center, UC San Diego, La Jolla, CA, USA
| | - Natsuko Nomura
- Neuro-Oncology Program, Moores Cancer Center, UC San Diego, La Jolla, CA, USA
- Department of Translational Neurosciences, Pacific Neuroscience Institute & Saint John's Cancer Institute at Providence Saint John's Health Center, 2200 Santa Monica Blvd., Santa Monica, CA, 90404, USA
| | - Feng Lin
- Curescience Institute, 5820 Oberlin Drive Ste 202, San Diego, CA, 92121, USA
| | - Santosh Kesari
- Department of Translational Neurosciences, Pacific Neuroscience Institute & Saint John's Cancer Institute at Providence Saint John's Health Center, 2200 Santa Monica Blvd., Santa Monica, CA, 90404, USA.
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Liu Y, Tang Q, Tao Q, Dong H, Shi Z, Zhou L. Low-frequency magnetic field therapy for glioblastoma: Current advances, mechanisms, challenges and future perspectives. J Adv Res 2024:S2090-1232(24)00125-5. [PMID: 38565404 DOI: 10.1016/j.jare.2024.03.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 03/10/2024] [Accepted: 03/29/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Glioblastoma (GBM) is the most common malignant tumour of the central nervous system. Despite recent advances in multimodal GBM therapy incorporating surgery, radiotherapy, systemic therapy (chemotherapy, targeted therapy), and supportive care, the overall survival (OS) remains poor, and long-term survival is rare. Currently, the primary obstacles hindering the effectiveness of GBM treatment are still the blood-brain barrier and tumor heterogeneity. In light of its substantial advantages over conventional therapies, such as strong penetrative ability and minimal side effects, low-frequency magnetic fields (LF-MFs) therapy has gradually caught the attention of scientists. AIM OF REVIEW In this review, we shed the light on the current status of applying LF-MFs in the treatment of GBM. We specifically emphasize our current understanding of the mechanisms by which LF-MFs mediate anticancer effects and the challenges faced by LF-MFs in treating GBM cells. Furthermore, we discuss the prospective applications of magnetic field therapy in the future treatment of GBM. Key scientific concepts of review: The review explores the current progress on the use of LF-MFs in the treatment of GBM with a special focus on the potential underlying mechanisms of LF-MFs in anticancer effects. Additionally, we also discussed the complex magnetic field features and biological characteristics related to magnetic bioeffects. Finally, we proposed a promising magnetic field treatment strategy for future applications in GBM therapy.
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Affiliation(s)
- Yinlong Liu
- Department of Neurosurgery, Huashan Hospital, Fudan University, China
| | - Qisheng Tang
- Department of Neurosurgery, Huashan Hospital, Fudan University, China; National Center for Neurological Disorders, China; Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, China; Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, China
| | - Quan Tao
- Shanghai Institute of Microsystem and Information Technology, China
| | - Hui Dong
- Shanghai Institute of Microsystem and Information Technology, China
| | - Zhifeng Shi
- Department of Neurosurgery, Huashan Hospital, Fudan University, China; National Center for Neurological Disorders, China; Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, China; Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, China.
| | - Liangfu Zhou
- Department of Neurosurgery, Huashan Hospital, Fudan University, China; National Center for Neurological Disorders, China; Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, China; Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, China.
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Barkhoudarian G, Badruddoja M, Blondin N, Chowdhary S, Cobbs C, Duic JP, Flores JP, Fonkem E, McClay E, Nabors LB, Salacz M, Taylor L, Vaillant B, Gill J, Kesari S. An expanded safety/feasibility study of the EMulate Therapeutics Voyager™ System in patients with recurrent glioblastoma. CNS Oncol 2023; 12:CNS102. [PMID: 37462385 PMCID: PMC10410686 DOI: 10.2217/cns-2022-0016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 07/06/2023] [Indexed: 08/08/2023] Open
Abstract
Aim: The EMulate Therapeutics Voyager™ is a simple, wearable, home-use device that uses an alternating electromagnetic field to alter biologic signaling within cells. Objective: To assess the safety/feasibility of the Voyager in the treatment of recurrent glioblastoma (rGBM). Methods: In this study, patients with rGBM were treated with Voyager as monotherapy or in combination with standard chemotherapy at the Investigator's discretion. Safety was assessed by incidence of adverse events associated with the Voyager. Patients were followed until death. Results: A total of 75 patients were enrolled and treated for at least one day with the Voyager (safety population). Device-related adverse events were uncommon and generally did not result in interruption or withdrawal from treatment. There were no serious adverse events associated with Voyager. A total of 60 patients were treated for at least one month (clinical utility population). The median progression-free survival (PFS) was 17 weeks (4.3 months) in the Voyager only group (n = 24) and 21 weeks (5.3 months) in the Voyager + concurrent therapy group (n = 36). The median overall survival (OS) was 7 months in the Voyager only group and 9 months in the Voyager + concurrent therapy group. In patients treated with Voyager + concurrent therapy, the median OS for patients enrolled with their 1st or 2nd recurrence (n = 26) was 10 months, while in patients enrolled with their 3rd or 4th recurrence (n = 10) OS was 7 months. Conclusion: The data support the safety and feasibility of the Voyager for the treatment of rGBM. Further prospective study of the device is warranted. Trial Registration Number: NCT02296580 (ClinicalTrials.gov).
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Affiliation(s)
- Garni Barkhoudarian
- Saint John's Cancer Institute & Pacific Neuroscience Institute at Providence St. John's Health Center, Santa Monica, CA 90404, USA
| | | | - Nicholas Blondin
- Associated Neurologists of Southern Connecticut, Fairfield, CT 06824, USA
| | | | - Charles Cobbs
- Swedish Medical Center, Ben and Catherine Ivy Center For Advanced Brain Tumor Treatment, Seattle, WA 98122, USA
| | | | | | | | - Edward McClay
- cCARE (California Cancer Associates for Research & Excellence), Encinitas, CA 92024, USA
| | - Louis Burt Nabors
- University of Alabama, Division of Neuro-Oncology, Birmingham, AL 35294-3410, USA
| | - Michael Salacz
- University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Lynn Taylor
- University of Washington, Seattle, WA 98195, USA
| | | | - Jaya Gill
- Saint John's Cancer Institute & Pacific Neuroscience Institute at Providence St. John's Health Center, Santa Monica, CA 90404, USA
| | - Santosh Kesari
- Saint John's Cancer Institute & Pacific Neuroscience Institute at Providence St. John's Health Center, Santa Monica, CA 90404, USA
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Current status of the preclinical evaluation of alternating electric fields as a form of cancer therapy. Bioelectrochemistry 2023; 149:108287. [DOI: 10.1016/j.bioelechem.2022.108287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 09/28/2022] [Accepted: 10/02/2022] [Indexed: 11/06/2022]
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Straiton J. Welcome to Volume 9 of CNS Oncology. CNS Oncol 2020; 9:CNS49. [PMID: 32118489 PMCID: PMC7163402 DOI: 10.2217/cns-2019-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Affiliation(s)
- Jennifer Straiton
- Future Science Group, Unitec House, 2 Albert Place, London, N3 1QB, UK
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Induction of apoptosis and ferroptosis by a tumor suppressing magnetic field through ROS-mediated DNA damage. Aging (Albany NY) 2020; 12:3662-3681. [PMID: 32074079 PMCID: PMC7066880 DOI: 10.18632/aging.102836] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/27/2020] [Indexed: 12/12/2022]
Abstract
Magnetic field (MF) is being used in antitumor treatment; however, the underlying biological mechanisms remain unclear. In this study, the potency and mechanism of a previously published tumor suppressing MF exposure protocol were further investigated. This protocol, characterized as a 50 Hz electromagnetic field modulated by static MF with time-average intensity of 5.1 mT, when applied for 2 h daily for over 3 consecutive days, selectively inhibited the growth of a broad spectrum of tumor cell lines including lung cancer, gastric cancer, pancreatic cancer and nephroblastoma. The level of intracellular reactive oxygen species (ROS) increased shortly after field exposure and persisted. Subsequently, pronounced DNA damage and activation of DNA repair pathways were identified both in vitro and in vivo. Furthermore, use of free radical scavenger alleviated DNA damage and partially reduced cell death. Finally, this field was found to inhibit cell proliferation, and simultaneously induced two types of programmed cell death, apoptosis and ferroptosis. In conclusion, this tumor suppressing MF could determine cell fate through ROS-induced DNA damage, inducing oxidative stress and activation of the DNA damage repair pathways, eventually lead to apoptosis and ferroptosis, as well as inhibition of tumor growth.
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Affiliation(s)
- Victor A Levin
- Department of Neuro-Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77005, USA.,Department of Neurosurgery, University of California San Francisco School of Medicine, San Francisco, CA, 94143, USA.,Department of Neurosurgery & Neuroscience, Kaiser Permanente Medical Center, Redwood City, CA, 94063, USA
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