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Kondo N. DNA damage and biological responses induced by Boron Neutron Capture Therapy (BNCT). Enzymes 2022; 51:65-78. [PMID: 36336409 DOI: 10.1016/bs.enz.2022.08.005] [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: 06/16/2023]
Abstract
Boron Neutron Capture Therapy (BNCT) is a tumor cell selective high LET (linear energy transfer) particle beam therapy. The patient is administrated a boron (10B) compound via intravenous injection or infusion, and when 10B is sufficiently accumulated in the tumor, neutron beams containing epithermal neutrons as the main component are irradiated. Epithermal neutrons lose energy in the body and become thermal neutrons. The captured 10B undergoes a (n, α) reaction with thermal neutrons, and the resulting α particles and 7Li nuclei have short ranges of 9-10μm and 4-5μm, respectively, and do not reach the surrounding cells in normal tissues. Therefore, these high LET-heavy charged particles can selectively kill cancer cells. The cell-killing effect of these heavy charged particles is thought to be triggered by DNA damage. It is known that DNA damage caused by heavy charged particles is more serious and difficult to repair than DNA damage caused by Low LET radiation such as X-rays and γ-rays. This review focuses on DNA damage, e.g., DNA strand breaks and DNA damage repair caused by BNCT and describes the resulting biological response.
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Affiliation(s)
- Natsuko Kondo
- Particle Radiation Oncology Research Center, Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka, Japan.
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Nakase I, Katayama M, Hattori Y, Ishimura M, Inaura S, Fujiwara D, Takatani-Nakase T, Fujii I, Futaki S, Kirihata M. Intracellular target delivery of cell-penetrating peptide-conjugated dodecaborate for boron neutron capture therapy (BNCT). Chem Commun (Camb) 2019; 55:13955-13958. [PMID: 31617510 DOI: 10.1039/c9cc03924d] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this study, we designed and synthesized organelle-targeted cell-penetrating peptide (CPP)-conjugated boron compounds to increase their cellular uptake and to control the intracellular locations for the induction of sophisticated anticancer biological activity in boron neutron capture therapy (BNCT), leading to anticancer effects with ATP reduction and apoptosis when irradiated with neutrons in an in vitro BNCT assay.
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Affiliation(s)
- Ikuhiko Nakase
- Graduate School of Science, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
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4
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Cirrone GAP, Manti L, Margarone D, Petringa G, Giuffrida L, Minopoli A, Picciotto A, Russo G, Cammarata F, Pisciotta P, Perozziello FM, Romano F, Marchese V, Milluzzo G, Scuderi V, Cuttone G, Korn G. First experimental proof of Proton Boron Capture Therapy (PBCT) to enhance protontherapy effectiveness. Sci Rep 2018; 8:1141. [PMID: 29348437 PMCID: PMC5773549 DOI: 10.1038/s41598-018-19258-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 12/27/2017] [Indexed: 01/16/2023] Open
Abstract
Protontherapy is hadrontherapy's fastest-growing modality and a pillar in the battle against cancer. Hadrontherapy's superiority lies in its inverted depth-dose profile, hence tumour-confined irradiation. Protons, however, lack distinct radiobiological advantages over photons or electrons. Higher LET (Linear Energy Transfer) 12C-ions can overcome cancer radioresistance: DNA lesion complexity increases with LET, resulting in efficient cell killing, i.e. higher Relative Biological Effectiveness (RBE). However, economic and radiobiological issues hamper 12C-ion clinical amenability. Thus, enhancing proton RBE is desirable. To this end, we exploited the p + 11B → 3α reaction to generate high-LET alpha particles with a clinical proton beam. To maximize the reaction rate, we used sodium borocaptate (BSH) with natural boron content. Boron-Neutron Capture Therapy (BNCT) uses 10B-enriched BSH for neutron irradiation-triggered alpha particles. We recorded significantly increased cellular lethality and chromosome aberration complexity. A strategy combining protontherapy's ballistic precision with the higher RBE promised by BNCT and 12C-ion therapy is thus demonstrated.
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Affiliation(s)
- G A P Cirrone
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy.
| | - L Manti
- Physics Department, University of Naples Federico II, Naples, Italy
- INFN Naples Section, Complesso Universitario di Monte S. Angelo, Via Cintia, Naples, Italy
| | - D Margarone
- Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, Na Slovance 2, Prague, 18221, Czech Republic
| | - G Petringa
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
- Physics Department, University of Catania, via S. Sofia, 64, Catania, Italy
| | - L Giuffrida
- Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, Na Slovance 2, Prague, 18221, Czech Republic
| | - A Minopoli
- Physics Department, University of Naples Federico II, Naples, Italy
| | - A Picciotto
- Fondazione Bruno Kessler, Micro-Nano Facility, Via Sommarive 18, 38123, Povo-Trento, Italy
| | - G Russo
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
- Institute of Molecular Bioimaging and Physiology - National Research Council - (IBFM-CNR), Cefalù, (PA), Italy
| | - F Cammarata
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
- Institute of Molecular Bioimaging and Physiology - National Research Council - (IBFM-CNR), Cefalù, (PA), Italy
| | - P Pisciotta
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
- Physics Department, University of Catania, via S. Sofia, 64, Catania, Italy
| | - F M Perozziello
- Physics Department, University of Naples Federico II, Naples, Italy
- INFN Naples Section, Complesso Universitario di Monte S. Angelo, Via Cintia, Naples, Italy
| | - F Romano
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
- National Physical Laboratory, Acoustic and Ionizing Radiation Division, Teddington, TW11 0LW, Middlesex, United Kingdom
| | - V Marchese
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
| | - G Milluzzo
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
- Physics Department, University of Catania, via S. Sofia, 64, Catania, Italy
| | - V Scuderi
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
- Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, Na Slovance 2, Prague, 18221, Czech Republic
| | - G Cuttone
- Istituto Nazionale di Fisica Nucleare- Laboratori Nazionali dei Sud, via S. Sofia, 62, Catania, Italy
| | - G Korn
- Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, Na Slovance 2, Prague, 18221, Czech Republic
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γ-H2AX/53BP1/pKAP-1 foci and their linear tracks induced by in vitro exposure to radon and its progeny in human peripheral blood lymphocytes. Sci Rep 2016; 6:38295. [PMID: 27922110 PMCID: PMC5138821 DOI: 10.1038/srep38295] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 11/07/2016] [Indexed: 02/06/2023] Open
Abstract
The biodosimetric information is critical for evaluating the human health hazards caused by radon and its progeny. Here, we demonstrated that the formation of phosphorylated histone variant H2AX (γ-H2AX), p53-binding protein 1 (53BP1) and phosphorylated KRAB-associated protein 1 (pKAP-1) foci and their linear tracks in human peripheral blood lymphocytes (HPBLs) in vitro exposed to radon and its progeny were dependent on the cumulative absorbed dose of radon exposure but was unrelated to the concentration of radon. Among them, γ-H2AX foci and its linear tracks were the most sensitive indicators with the lowest estimable cumulative absorbed dose of 1.74 mGy from their linear dose-response curves and sustained for 12 h after termination of radon exposure. In addition, three types of foci showed an overdispersed non-Poisson distribution in HPBLs. The ratios of pKAP-1/γ-H2AX foci co-localization, 53BP1/γ-H2AX foci co-localization and 53BP1/pKAP-1 foci co-localization were significantly increased in HPBLs exposed to radon while they were unrelated to the cumulative dose of radon exposure, suggesting that γ-H2AX, pKAP-1 and 53BP1 play an important role in the repair of heterochromatic double-strand breaks. Altogether, our findings provide an experimental basis for estimating the biological dose of internal α-particle irradiation from radon and its progeny exposure in humans.
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