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Gandia D, Gandarias L, Rodrigo I, Robles-García J, Das R, Garaio E, García JÁ, Phan MH, Srikanth H, Orue I, Alonso J, Muela A, Fdez-Gubieda ML. Unlocking the Potential of Magnetotactic Bacteria as Magnetic Hyperthermia Agents. Small 2019; 15:e1902626. [PMID: 31454160 DOI: 10.1002/smll.201902626] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/24/2019] [Indexed: 05/19/2023]
Abstract
Magnetotactic bacteria are aquatic microorganisms that internally biomineralize chains of magnetic nanoparticles (called magnetosomes) and use them as a compass. Here it is shown that magnetotactic bacteria of the strain Magnetospirillum gryphiswaldense present high potential as magnetic hyperthermia agents for cancer treatment. Their heating efficiency or specific absorption rate is determined using both calorimetric and AC magnetometry methods at different magnetic field amplitudes and frequencies. In addition, the effect of the alignment of the bacteria in the direction of the field during the hyperthermia experiments is also investigated. The experimental results demonstrate that the biological structure of the magnetosome chain of magnetotactic bacteria is perfect to enhance the hyperthermia efficiency. Furthermore, fluorescence and electron microscopy images show that these bacteria can be internalized by human lung carcinoma cells A549, and cytotoxicity studies reveal that they do not affect the viability or growth of the cancer cells. A preliminary in vitro hyperthermia study, working on clinical conditions, reveals that cancer cell proliferation is strongly affected by the hyperthermia treatment, making these bacteria promising candidates for biomedical applications.
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Affiliation(s)
- David Gandia
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
| | - Lucía Gandarias
- Departamento de Inmunología, Microbiología y Parasitología, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - Irati Rodrigo
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
| | - Joshua Robles-García
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Raja Das
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Eneko Garaio
- Departamento de Física Aplicada II, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
- Departamento de Ciencias, Universidad Pública de Navarra (UPN), Pamplona, 31006, Spain
| | - José Ángel García
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
- Departamento de Física Aplicada II, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - Manh-Huong Phan
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Hariharan Srikanth
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Iñaki Orue
- SGIker Medidas Magnéticas, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - Javier Alonso
- Departamento CITIMAC, Universidad de Cantabria (UC), Santander, 39005, Spain
| | - Alicia Muela
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
- Departamento de Inmunología, Microbiología y Parasitología, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - M Luisa Fdez-Gubieda
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
- Departamento de Electricidad y Electrónica, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
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Gandia D, Gandarias L, Rodrigo I, Robles-García J, Das R, Garaio E, García JÁ, Phan MH, Srikanth H, Orue I, Alonso J, Muela A, Fdez-Gubieda ML. Unlocking the Potential of Magnetotactic Bacteria as Magnetic Hyperthermia Agents. Small 2019; 15:e1902626. [PMID: 31454160 DOI: 10.1002/smll.201970222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/24/2019] [Indexed: 05/25/2023]
Abstract
Magnetotactic bacteria are aquatic microorganisms that internally biomineralize chains of magnetic nanoparticles (called magnetosomes) and use them as a compass. Here it is shown that magnetotactic bacteria of the strain Magnetospirillum gryphiswaldense present high potential as magnetic hyperthermia agents for cancer treatment. Their heating efficiency or specific absorption rate is determined using both calorimetric and AC magnetometry methods at different magnetic field amplitudes and frequencies. In addition, the effect of the alignment of the bacteria in the direction of the field during the hyperthermia experiments is also investigated. The experimental results demonstrate that the biological structure of the magnetosome chain of magnetotactic bacteria is perfect to enhance the hyperthermia efficiency. Furthermore, fluorescence and electron microscopy images show that these bacteria can be internalized by human lung carcinoma cells A549, and cytotoxicity studies reveal that they do not affect the viability or growth of the cancer cells. A preliminary in vitro hyperthermia study, working on clinical conditions, reveals that cancer cell proliferation is strongly affected by the hyperthermia treatment, making these bacteria promising candidates for biomedical applications.
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Affiliation(s)
- David Gandia
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
| | - Lucía Gandarias
- Departamento de Inmunología, Microbiología y Parasitología, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - Irati Rodrigo
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
| | - Joshua Robles-García
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Raja Das
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Eneko Garaio
- Departamento de Física Aplicada II, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
- Departamento de Ciencias, Universidad Pública de Navarra (UPN), Pamplona, 31006, Spain
| | - José Ángel García
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
- Departamento de Física Aplicada II, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - Manh-Huong Phan
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Hariharan Srikanth
- Materials Institute, Department of Physics, University of South Florida (USF), Tampa, FL, 33620, USA
| | - Iñaki Orue
- SGIker Medidas Magnéticas, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - Javier Alonso
- Departamento CITIMAC, Universidad de Cantabria (UC), Santander, 39005, Spain
| | - Alicia Muela
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
- Departamento de Inmunología, Microbiología y Parasitología, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
| | - M Luisa Fdez-Gubieda
- Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, 48940, Spain
- Departamento de Electricidad y Electrónica, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain
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