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Medina L, Kaehr B, Serda RE. Cancer Cell Silicification and Surface Functionalization to Create Microbial Mimetic Cancer Vaccines. Methods Mol Biol 2024; 2720:209-219. [PMID: 37775668 DOI: 10.1007/978-1-0716-3469-1_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2023]
Abstract
As cancer progresses, tumor cells adapt to evade immune cells. To counter this, cancer cells can be silicified ex vivo, creating surface masks that can be decorated with microbial-associated molecules that are readily recognized by antigen-presenting cells (APCs). The transformation process renders the tumor cells nonviable and preserves the integrity of the cell and associated tumor antigens. The resulting personalized cancer vaccine, when returned to the patient, engages molecules on the surface of APC, activating signaling pathways that lead to immune cell activation, vaccine internalization, processing of tumor antigens, and major histocompatibility complex peptide presentation to T cells. The cancer-specific T cells then circulate throughout the body, killing tumor cells. This chapter presents detailed methods for the cryogenic precipitation of silica on cellular structures (cryo-silicification), creating vaccines that are potent immune activators. Further, silicified cells can be dehydrated for shelf storage, eliminating the need for costly cryogenic storage.
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Affiliation(s)
- Lorél Medina
- Department of Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM, USA
| | - Bryan Kaehr
- Sandia National Laboratories, Albuquerque, NM, USA
| | - Rita E Serda
- Department of Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM, USA.
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Sharma R, Pahwa R, Ahuja M. Iodine‐loaded poly(silicic acid) gellan nanocomposite mucoadhesive film for antibacterial application. J Appl Polym Sci 2020. [DOI: 10.1002/app.49679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Rashmi Sharma
- Drug Delivery Research Laboratory, Department of Pharmaceutical Sciences Guru Jambheshwar University of Science and Technology Hisar India
| | - Rimpy Pahwa
- Drug Delivery Research Laboratory, Department of Pharmaceutical Sciences Guru Jambheshwar University of Science and Technology Hisar India
| | - Munish Ahuja
- Drug Delivery Research Laboratory, Department of Pharmaceutical Sciences Guru Jambheshwar University of Science and Technology Hisar India
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Casabianca S, Capellacci S, Penna A, Cangiotti M, Fattori A, Corsi I, Ottaviani MF, Carloni R. Physical interactions between marine phytoplankton and PET plastics in seawater. CHEMOSPHERE 2020; 238:124560. [PMID: 31437632 DOI: 10.1016/j.chemosphere.2019.124560] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/24/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
Plastics are the most abundant marine debris globally dispersed in the oceans and its production is rising with documented negative impacts in marine ecosystems. However, the chemical-physical and biological interactions occurring between plastic and planktonic communities of different types of microorganisms are poorly understood. In these respects, it is of paramount importance to understand, on a molecular level on the surface, what happens to plastic fragments when dispersed in the ocean and directly interacting with phytoplankton assemblages. This study presents a computer-aided analysis of electron paramagnetic resonance (EPR) spectra of selected spin probes able to enter the phyoplanktonic cell interface and interact with the plastic surface. Two different marine phytoplankton species were analyzed, such as the diatom Skeletonema marinoi and dinoflagellate Lingulodinium polyedrum, in absence and presence of polyethylene terephthalate (PET) fragments in synthetic seawater (ASPM), in order to in-situ characterize the interactions occurring between the microalgal cells and plastic surfaces. The analysis was performed at increasing incubation times. The cellular growth and adhesion rates of microalgae in batch culture medium and on the plastic fragments were also evaluated. The data agreed with the EPR results, which showed a significant difference in terms of surface properties between the diatom and dinoflagellate species. Low-polar interactions of lipid aggregates with the plastic surface sites were mainly responsible for the cell-plastic adhesion by S. marinoi, which is exponentially growing on the plastic surface over the incubation time.
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Affiliation(s)
- Silvia Casabianca
- Department of Biomolecular Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy; Conisma, Consorzio di Scienze Interuniversitario sul Mare, Piazzale Flaminio 6, 00136, Rome, Italy.
| | - Samuela Capellacci
- Department of Biomolecular Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy; Conisma, Consorzio di Scienze Interuniversitario sul Mare, Piazzale Flaminio 6, 00136, Rome, Italy
| | - Antonella Penna
- Department of Biomolecular Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy; Conisma, Consorzio di Scienze Interuniversitario sul Mare, Piazzale Flaminio 6, 00136, Rome, Italy
| | - Michela Cangiotti
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy
| | - Alberto Fattori
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy
| | - Ilaria Corsi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Italy
| | - Maria Francesca Ottaviani
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy
| | - Riccardo Carloni
- Department of Pure and Applied Sciences, Campus E. Mattei, Via Cà le Suore 2/4, 61029, Urbino, PU, Italy.
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Park YS, Kim G, Lee JS. Anisotropic Silicification of Nanostructured Surfaces by Local Liquid-Phase Deposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12656-12664. [PMID: 31490695 DOI: 10.1021/acs.langmuir.9b01998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Exploration of the bioinspired silicification of artificial scaffolds is crucial to understanding and engineering the hierarchically complex and elaborate three-dimensional (3D) frustules of diatoms, which have high porosity and mechanical stability with related gas diffusion and storage properties. Herein, we report on the bioinspired silicification of the nanostructured surfaces of hexagonally close-packed silica bead (hc-SB) arrays using a liquid-phase deposition (LPD) method. This process, governed by the kinetics of silicification, was controlled using the concentration of the reactants and the reaction temperature and monitored in real time using a quartz-crystal microbalance, which allowed the investigation of the silicification on the surface during the LPD reaction. These heterogeneous LPD reactions on hc-SB arrays were optimized to mimic natural 3D hierarchical structures. Anisotropic silicification of the nanostructures occurred owing to differences in the energy and local concentration of silicic acid on the nanostructured surface. A 3D hierarchical pore network was realized via a heterogeneous LPD reaction by controlling the size, location, and arrangement of the SBs. We believe that our silicification process on nanostructured surfaces can lead to great improvements in the bioinspired morphogenesis-based engineering of 3D hierarchical structures.
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Affiliation(s)
- Yi-Seul Park
- Materials and Life Science Research Division , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
- Department of Chemistry , Sookmyung Women's University , Seoul 04310 , Republic of Korea
| | - Gyuri Kim
- Department of Chemistry , Sookmyung Women's University , Seoul 04310 , Republic of Korea
| | - Jin Seok Lee
- Department of Chemistry , Sookmyung Women's University , Seoul 04310 , Republic of Korea
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Yew GY, Lee SY, Show PL, Tao Y, Law CL, Nguyen TTC, Chang JS. Recent advances in algae biodiesel production: From upstream cultivation to downstream processing. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100227] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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