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Mothersill C, Seymour C, Cocchetto A, Williams D. Factors Influencing Effects of Low-dose Radiation Exposure. HEALTH PHYSICS 2024; 126:296-308. [PMID: 38526248 DOI: 10.1097/hp.0000000000001816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
ABSTRACT It is now well accepted that the mechanisms induced by low-dose exposures to ionizing radiation (LDR) are different from those occurring after high-dose exposures. However, the downstream effects of these mechanisms are unclear as are the quantitative relationships between exposure, effect, harm, and risk. In this paper, we will discuss the mechanisms known to be important with an overall emphasis on how so-called "non-targeted effects" (NTE) communicate and coordinate responses to LDR. Targeted deposition of ionizing radiation energy in cells causing DNA damage is still regarded as the dominant trigger leading to all downstream events whether targeted or non-targeted. We regard this as an over-simplification dating back to formal target theory. It ignores that last 100 y of biological research into stress responses and signaling mechanisms in organisms exposed to toxic substances, including ionizing radiation. We will provide evidence for situations where energy deposition in cellular targets alone cannot be plausible as a mechanism for LDR effects. An example is where the energy deposition takes place in an organism not receiving the radiation dose. We will also discuss how effects after LDR depend more on dose rate and radiation quality rather than actual dose, which appears rather irrelevant. Finally, we will use recent evidence from studies of cataract and melanoma induction to suggest that after LDR, post-translational effects, such as protein misfolding or defects in energy metabolism or mitochondrial function, may dominate the etiology and progression of the disease. A focus on such novel pathways may open the way to successful prophylaxis and development of new biomarkers for better risk assessment after low dose exposures.
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Affiliation(s)
- Carmel Mothersill
- Department of Biology, McMaster University, 1280 Main St., Hamilton, ON, Canada L8S 4L8
| | - Colin Seymour
- Department of Biology, McMaster University, 1280 Main St., Hamilton, ON, Canada L8S 4L8
| | - Alan Cocchetto
- The National CFIDS Foundation, 285 Beach Ave., Hull, MA 02045
| | - David Williams
- Cambridge University, The Old Schools, Trinity Lane, Cambridge CB2 1TN, United Kingdom
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2
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Haley B, Zander A, Popović J, Paunesku T, Woloschak GE. Findings from international archived data: Fractionation reduces mortality risk of ionizing radiation for total doses below 4 Gray in rodents. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2022; 882:503537. [PMID: 36155139 DOI: 10.1016/j.mrgentox.2022.503537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 06/16/2023]
Abstract
Ionizing radiation is omnipresent and unavoidable on Earth; nevertheless, the range of doses and modes of radiation delivery that represent health risks remain controversial. Radiation protection policy for civilians in US is set at 1 mSv per year. Average persons from contemporary populations are exposed to several hundred milliSieverts (mSv) over their lifetimes from both natural and human made sources such as radon, cosmic rays, CT-scans (20-50 mSv partial body exposure per scan), etc. Health risks associated with these and larger exposures are focus of many epidemiological studies, but uncertainties of these estimates coupled with individual and environmental variation make it is prudent to attempt to use animal models and tightly controlled experimental conditions to supplement our evaluation of radiation risk question. Data on 11,528 of rodents of both genders exposed to x-ray or gamma-ray radiation in facilities in US and Europe were used for this analysis; animal mortality data argue that fractionated radiation exposures have about 2 fold less risk per Gray than acute radiation exposures in the range of doses between 0.25 and 4 Gy.
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Affiliation(s)
- Benjamin Haley
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA; ClassDojo, 735 Tehama Street, San Francisco CA 94103, USA
| | - Alia Zander
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA; Chicago-Tempus Headquarters and Lab, 600 West Chicago Avenue, Suite 510, Chicago, IL 60654, USA
| | - Jelena Popović
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | - Tatjana Paunesku
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA
| | - Gayle E Woloschak
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL 60611, USA.
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3
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Wang X, Liu Y, He J, Wang J, Chen X, Yang R. Regulation of signaling pathways in hair follicle stem cells. BURNS & TRAUMA 2022; 10:tkac022. [PMID: 35795256 PMCID: PMC9250793 DOI: 10.1093/burnst/tkac022] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 02/07/2022] [Indexed: 11/21/2022]
Abstract
Hair follicle stem cells (HFSCs) reside in the bulge region of the outer root sheath of the hair follicle. They are considered slow-cycling cells that are endowed with multilineage differentiation potential and superior proliferative capacity. The normal morphology and periodic growth of HFSCs play a significant role in normal skin functions, wound repair and skin regeneration. The HFSCs involved in these pathophysiological processes are regulated by a series of cell signal transduction pathways, such as lymphoid enhancer factor/T-cell factor, Wnt/β-catenin, transforming growth factor-β/bone morphogenetic protein, Notch and Hedgehog. The mechanisms of the interactions among these signaling pathways and their regulatory effects on HFSCs have been previously studied, but many mechanisms are still unclear. This article reviews the regulation of hair follicles, HFSCs and related signaling pathways, with the aims of summarizing previous research results, revealing the regulatory mechanisms of HFSC proliferation and differentiation and providing important references and new ideas for treating clinical diseases.
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Affiliation(s)
| | | | - Jia He
- Department of Burn Surgery, The First People’s Hospital of Foshan, Foshan 528000, China
| | - Jingru Wang
- Department of Burn Surgery, The First People’s Hospital of Foshan, Foshan 528000, China
| | - Xiaodong Chen
- Correspondence. Xiaodong Chen, E-mail: ; Ronghua Yang,
| | - Ronghua Yang
- Correspondence. Xiaodong Chen, E-mail: ; Ronghua Yang,
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4
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Song WS, Lee JS, Lim JW, Kim J, Jo SH, Kwon JE, Park JH, Choi SH, Jang D, Kim IW, Jeong JH, Kim YG. Multiomics characterization of dose- and time-dependent effects of ionizing radiation on human skin keratinocytes. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1095-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Kaur L, Sohal HS, Kaur M, Malhi DS, Garg S. A Mini-Review on Nano Technology in the Tumour Targeting Strategies: Drug Delivery to Cancer Cells. Anticancer Agents Med Chem 2021; 20:2012-2024. [PMID: 32753024 DOI: 10.2174/1871520620666200804103714] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/20/2020] [Accepted: 07/16/2020] [Indexed: 01/17/2023]
Abstract
BACKGROUND Recently, the application of cancer nanotechnology-based drug delivery to cancer cells has arisen as an important method to resolve multiple molecular, biophysical, and biochemical obstacles, which the body is preparing to resist against the productive implementation of chemotherapeutic medications. Drug delivery technologies focused on nanoparticles, which have resolved some of the drawbacks of conventional chemotherapy as, decreased drug viscosity, chemo-resistance, precise malignity, limited medicative measures with low oral bioactivity. Due to their adjustable size and surface properties, the half-life period of a drug can be increased in the bloodstream. OBJECTIVE The aim of the current study is to collect and document the data available on the drug delivery system for anticancer drugs. The present study includes some of the drug carriers like liposomes, carbon dots, micelles, carbon nanotubes, magnetic nanoparticles, etc. Methods: To write this review, an exhaustive literature survey was carried out using relevant work published in various SCI, Scopus, and non-SCI indexed journals. The different search engines used to download the research/ review papers are Google search, PubMed, Science Direct, Google Scholar, Scientific Information Database and Research Gate, etc. Results: Nanotechnology offers better pharmacokinetics, reduces the systematic toxicities related to the chemotherapies and a better route of drug administration. In the analysis, we critically highlight recent studies on carcinoma-fighting nanotechnology. CONCLUSION In the present study, different kinds of nano-based drug delivery systems have been discussed along with their characteristic features, the encapsulation of anticancer agents into different types of nanometresized vehicles and their general mechanism.
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Affiliation(s)
- Loveleen Kaur
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
| | - Harvinder S Sohal
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
| | - Manvinder Kaur
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
| | - Dharambeer S Malhi
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
| | - Sonali Garg
- Medicinal and Natural Product Laboratory, Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
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Barnard SGR, McCarron R, Mancuso M, De Stefano I, Pazzaglia S, Pawliczek D, Dalke C, Ainsbury EA. Radiation-induced DNA Damage and Repair in Lens Epithelial Cells of both Ptch1(+/-) and Ercc2(+/-) Mutated Mice. Radiat Res 2021; 197:36-42. [PMID: 33652474 DOI: 10.1667/rade-20-00264.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/22/2021] [Indexed: 11/03/2022]
Abstract
Epidemiological studies suggest an increased incidence and risk of cataract after low-dose (<2 Gy) ionizing radiation exposures. However, the biological mechanism(s) of this process are not fully understood. DNA damage and repair are thought to have a contributing role in radiation-induced cataractogenesis. Recently we have reported an inverse dose-rate effect, as well as the low-dose response, of DNA damage and repair in lens epithelial cells (LECs). Here, we present further initial findings from two mutated strains (Ercc2+/- and Ptch1+/-) of mice, both reportedly susceptible to radiation-induced cataract, and their DNA damage and repair response to low-dose and low-dose-rate gamma rays. Our results support the hypothesis that the lens epithelium responds differently to radiation than other tissues, with reported radiation susceptibility to DNA damage not necessarily translating to the LECs. Genetic predisposition and strain(s) of mice have a significant role in radiation-induced cataract susceptibility.
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Affiliation(s)
- S G R Barnard
- Public Health England, Centre for Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxon, United Kingdom.,Department of Biosciences, University of Durham, Mountjoy Science Site, Durham DH13LE, United Kingdom
| | - R McCarron
- Public Health England, Centre for Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxon, United Kingdom
| | - M Mancuso
- Laboratory of Biomedical Technologies, Agenzia Nazionale per le Nuove Tecnologie, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), Rome, Italy
| | - I De Stefano
- Laboratory of Biomedical Technologies, Agenzia Nazionale per le Nuove Tecnologie, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), Rome, Italy
| | - S Pazzaglia
- Laboratory of Biomedical Technologies, Agenzia Nazionale per le Nuove Tecnologie, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), Rome, Italy
| | - D Pawliczek
- Helmholtz Zentrum München GmbH - German Research Center for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - C Dalke
- Helmholtz Zentrum München GmbH - German Research Center for Environmental Health, Institute of Developmental Genetics, Neuherberg, Germany
| | - E A Ainsbury
- Public Health England, Centre for Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxon, United Kingdom
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7
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Purohit E, Karimipour D, Madder RD. Multiple Cutaneous Cancers in an Interventional Cardiologist: Predominance in Unprotected Skin Nearest the Radiation Source. CARDIOVASCULAR REVASCULARIZATION MEDICINE 2021; 28S:206-207. [PMID: 33549498 DOI: 10.1016/j.carrev.2021.01.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 11/18/2022]
Abstract
A 70 year-old interventional cardiologist, who worked in the cardiac catheterization laboratory for >35 years, developed multiple skin cancers in regions not conventionally covered by protective lead apparel. The majority of lesions were left-sided, representing cutaneous regions in closest proximity to the radiation source. Although skin not covered by lead apparel often receives frequent sun exposure, a known risk factor for skin cancer, malignancies resulting exclusively from sun exposure would not in most cases be expected to have a left-sided predominance. Additional research is warranted to study the potential link between occupational radiation exposure and skin cancer risk.
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Affiliation(s)
- Eesha Purohit
- Frederik Meijer Heart & Vascular Institute, Spectrum Health, Grand Rapids, MI, United States of America
| | - Darius Karimipour
- Department of Internal Medicine, Division of Dermatology, Oakland University - William Beaumont School of Medicine, United States of America
| | - Ryan D Madder
- Frederik Meijer Heart & Vascular Institute, Spectrum Health, Grand Rapids, MI, United States of America.
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8
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Liu Y, Wang J, Chen D, Kam WR, Sullivan DA. The Role of Hypoxia-Inducible Factor 1α in the Regulation of Human Meibomian Gland Epithelial Cells. Invest Ophthalmol Vis Sci 2020; 61:1. [PMID: 32150252 PMCID: PMC7401459 DOI: 10.1167/iovs.61.3.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Purpose We recently discovered that a hypoxic environment is beneficial for meibomian gland (MG) function. The mechanisms underlying this effect are unknown, but we hypothesize that it is due to an increase in the levels of hypoxia-inducible factor 1α (HIF1α). In other tissues, HIF1α is the primary regulator of cellular responses to hypoxia, and HIF1α expression can be induced by multiple stimuli, including hypoxia and hypoxia-mimetic agents. The objective of this study was to test our hypothesis. Methods Human eyelid tissues were stained for HIF1α. Immortalized human MG epithelial cells (IHMGECs) were cultured for varying time periods under normoxic (21% O2) or hypoxic (1% O2) conditions, in the presence or absence of the hypoxia-mimetic agent roxadustat (Roxa). IHMGECs were then processed for the analysis of cell number, HIF1α expression, lipid-containing vesicles, neutral and polar lipid content, DNase II activity, and intracellular pH. Results Our results show that HIF1α protein is present in human MG acinar epithelial cells in vivo. Our findings also demonstrate that exposure to 1% O2 or to Roxa increases the expression of HIF1α, the number of lipid-containing vesicles, the content of neutral lipids, and the activity of DNase II and decreases the pH in IHMGECs in vitro. Conclusions Our data support our hypothesis that the beneficial effect of hypoxia on the MG is mediated through an increased expression of HIF1α.
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9
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Averbeck D, Candéias S, Chandna S, Foray N, Friedl AA, Haghdoost S, Jeggo PA, Lumniczky K, Paris F, Quintens R, Sabatier L. Establishing mechanisms affecting the individual response to ionizing radiation. Int J Radiat Biol 2020; 96:297-323. [PMID: 31852363 DOI: 10.1080/09553002.2019.1704908] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Purpose: Humans are increasingly exposed to ionizing radiation (IR). Both low (<100 mGy) and high doses can cause stochastic effects, including cancer; whereas doses above 100 mGy are needed to promote tissue or cell damage. 10-15% of radiotherapy (RT) patients suffer adverse reactions, described as displaying radiosensitivity (RS). Sensitivity to IR's stochastic effects is termed radiosusceptibility (RSu). To optimize radiation protection we need to understand the range of individual variability and underlying mechanisms. We review the potential mechanisms contributing to RS/RSu focusing on RS following RT, the most tractable RS group.Conclusions: The IR-induced DNA damage response (DDR) has been well characterized. Patients with mutations in the DDR have been identified and display marked RS but they represent only a small percentage of the RT patients with adverse reactions. We review the impacting mechanisms and additional factors influencing RS/RSu. We discuss whether RS/RSu might be genetically determined. As a recommendation, we propose that a prospective study be established to assess RS following RT. The study should detail tumor site and encompass a well-defined grading system. Predictive assays should be independently validated. Detailed analysis of the inflammatory, stress and immune responses, mitochondrial function and life style factors should be included. Existing cohorts should also be optimally exploited.
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Affiliation(s)
| | - Serge Candéias
- CEA, CNRS, LCMB, University of Grenoble Alpes, Grenoble, France
| | - Sudhir Chandna
- Division of Radiation Biosciences, Institute of Nuclear Medicine & Allied Sciences, Delhi, India
| | - Nicolas Foray
- Inserm UA8 Unit Radiations: Defense, Health and Environment, Lyon, France
| | - Anna A Friedl
- Department of Radiation Oncology, University Hospital, LMU, Munich, Germany
| | - Siamak Haghdoost
- Cimap-Laria, Advanced Resource Center for HADrontherapy in Europe (ARCHADE,), University of Caen Normandy, France.,Centre for Radiation Protection Research, Department of Molecular Bioscience, Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Penelope A Jeggo
- Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Brighton, UK
| | - Katalin Lumniczky
- Department of Radiation Medicine, Division of Radiobiology and Radiohygiene, National Public Health Center, Budapest, Hungary
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10
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Tharmalingam S, Sreetharan S, Brooks AL, Boreham DR. Re-evaluation of the linear no-threshold (LNT) model using new paradigms and modern molecular studies. Chem Biol Interact 2019; 301:54-67. [PMID: 30763548 DOI: 10.1016/j.cbi.2018.11.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/13/2018] [Accepted: 11/22/2018] [Indexed: 02/06/2023]
Abstract
The linear no-threshold (LNT) model is currently used to estimate low dose radiation (LDR) induced health risks. This model lacks safety thresholds and postulates that health risks caused by ionizing radiation is directly proportional to dose. Therefore even the smallest radiation dose has the potential to cause an increase in cancer risk. Advances in LDR biology and cell molecular techniques demonstrate that the LNT model does not appropriately reflect the biology or the health effects at the low dose range. The main pitfall of the LNT model is due to the extrapolation of mutation and DNA damage studies that were conducted at high radiation doses delivered at a high dose-rate. These studies formed the basis of several outdated paradigms that are either incorrect or do not hold for LDR doses. Thus, the goal of this review is to summarize the modern cellular and molecular literature in LDR biology and provide new paradigms that better represent the biological effects in the low dose range. We demonstrate that LDR activates a variety of cellular defense mechanisms including DNA repair systems, programmed cell death (apoptosis), cell cycle arrest, senescence, adaptive memory, bystander effects, epigenetics, immune stimulation, and tumor suppression. The evidence presented in this review reveals that there are minimal health risks (cancer) with LDR exposure, and that a dose higher than some threshold value is necessary to achieve the harmful effects classically observed with high doses of radiation. Knowledge gained from this review can help the radiation protection community in making informed decisions regarding radiation policy and limits.
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Affiliation(s)
- Sujeenthar Tharmalingam
- Northern Ontario School of Medicine, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON, P3E 2C6, Canada.
| | - Shayenthiran Sreetharan
- Department of Medical Physics and Applied Radiation Sciences, McMaster University, 1280 Main Street W, Hamilton ON, L8S 4K1, Canada
| | - Antone L Brooks
- Environmental Science, Washington State University, Richland, WA, USA
| | - Douglas R Boreham
- Northern Ontario School of Medicine, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON, P3E 2C6, Canada; Bruce Power, Tiverton, ON(3), UK.
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11
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Squillaro T, Galano G, De Rosa R, Peluso G, Galderisi U. Concise Review: The Effect of Low-Dose Ionizing Radiation on Stem Cell Biology: A Contribution to Radiation Risk. Stem Cells 2018; 36:1146-1153. [DOI: 10.1002/stem.2836] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/22/2018] [Accepted: 04/06/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Tiziana Squillaro
- Department of Experimental Medicine; Campania University “Luigi Vanvitelli,”; Naples Italy
| | | | | | - Gianfranco Peluso
- Institute of Agro-Environmental and Forest Biology, CNR; Naples Italy
| | - Umberto Galderisi
- Department of Experimental Medicine; Campania University “Luigi Vanvitelli,”; Naples Italy
- Institute of Agro-Environmental and Forest Biology, CNR; Naples Italy
- Genome and Stem Cell Center (GENKOK), Erciyes University; Kayseri Turkey
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, Temple University; Philadelphia Pennsylvania USA
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12
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Olusanya TOB, Haj Ahmad RR, Ibegbu DM, Smith JR, Elkordy AA. Liposomal Drug Delivery Systems and Anticancer Drugs. Molecules 2018; 23:E907. [PMID: 29662019 PMCID: PMC6017847 DOI: 10.3390/molecules23040907] [Citation(s) in RCA: 297] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 03/29/2018] [Accepted: 04/09/2018] [Indexed: 12/27/2022] Open
Abstract
Cancer is a life-threatening disease contributing to ~3.4 million deaths worldwide. There are various causes of cancer, such as smoking, being overweight or obese, intake of processed meat, radiation, family history, stress, environmental factors, and chance. The first-line treatment of cancer is the surgical removal of solid tumours, radiation therapy, and chemotherapy. The systemic administration of the free drug is considered to be the main clinical failure of chemotherapy in cancer treatment, as limited drug concentration reaches the tumour site. Most of the active pharmaceutical ingredients (APIs) used in chemotherapy are highly cytotoxic to both cancer and normal cells. Accordingly, targeting the tumour vasculatures is essential for tumour treatment. In this context, encapsulation of anti-cancer drugs within the liposomal system offers secure platforms for the targeted delivery of anti-cancer drugs for the treatment of cancer. This, in turn, can be helpful for reducing the cytotoxic side effects of anti-cancer drugs on normal cells. This short-review focuses on the use of liposomes in anti-cancer drug delivery.
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Affiliation(s)
- Temidayo O B Olusanya
- School of Pharmacy and Pharmaceutical Sciences, University of Sunderland, Sunderland SR1 3SD, UK.
| | - Rita Rushdi Haj Ahmad
- School of Pharmacy and Pharmaceutical Sciences, University of Sunderland, Sunderland SR1 3SD, UK.
| | - Daniel M Ibegbu
- Department of Medical Biochemistry, College of Medicine, University of Nigeria Enugu Campus, Nigeria.
| | - James R Smith
- School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth PO1 2DT, UK.
| | - Amal Ali Elkordy
- School of Pharmacy and Pharmaceutical Sciences, University of Sunderland, Sunderland SR1 3SD, UK.
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13
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Schuler N, Timm S, Rübe CE. Hair Follicle Stem Cell Faith Is Dependent on Chromatin Remodeling Capacity Following Low-Dose Radiation. Stem Cells 2018; 36:574-588. [PMID: 29282803 DOI: 10.1002/stem.2768] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 11/21/2017] [Accepted: 12/03/2017] [Indexed: 12/17/2022]
Abstract
The main function of the skin, to protect against the environment, is supported by the activity of different stem cell populations. The main focus of this study was elucidating the coping mechanisms of stem cells against the stimulation of constant exposure to genotoxic stresses, both endogenous and exogenous, to ensure long-term function. Investigation of various mouse strains, differing in their DNA repair capacity, enables us to clarify fractionated low-dose irradiation (LDR)-induced consequences for different stem cell populations of the murine hair follicle (HF) in their physiological stem cell niche. Using microscopic techniques combined with flow cytometry, we could show that LDR induces accumulation of persisting; pKu70-independent 53BP1-foci ("chromatin-alterations") in heterochromatic regions of the HF stem cells (HFSCs). These remaining chromatin-alterations result in varying stem cell consequences. CD34-positive HFSCs react by ataxia telangiectasia mutated-dependent, premature senescence, which correlates with global chromatin compaction, whereby apoptosis is prevented by the activity of DNA-dependent protein kinase catalytic subunit. However, distinctively highly damaged HFSCs seem to be sorted out of the niche by differentiation, transferring their chromatin-alterations to more proliferative G protein-coupled receptor 5-positive stem cells. Consequentially, the loss of basal HFSCs is compensated by increased proliferation within the stem cell pool. Despite the initial success of these mechanisms in stem cell population maintenance, the combined effect of the chromatin-alterations and the modification in stem cell pool composition may lead to downstream long-term functional loss of tissue or organs. Stem Cells 2018;36:574-588.
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Affiliation(s)
- Nadine Schuler
- Department of Radiation Oncology, Saarland University, Homburg/Saar, Germany
| | - Sara Timm
- Department of Radiation Oncology, Saarland University, Homburg/Saar, Germany
| | - Claudia E Rübe
- Department of Radiation Oncology, Saarland University, Homburg/Saar, Germany
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14
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Nolta JA. Research Leads to Approved Therapies in the New Era of Living Medicine. Stem Cells 2017; 36:1-3. [PMID: 29210150 DOI: 10.1002/stem.2748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 11/28/2017] [Indexed: 11/08/2022]
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15
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Eagan JT, Jones CT, Roubin GS. Interventional cardiologists: Beware and be aware: An updated report of radiation-induced cutaneous cancers. Catheter Cardiovasc Interv 2017; 91:475-477. [DOI: 10.1002/ccd.27258] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/27/2017] [Accepted: 08/03/2017] [Indexed: 11/07/2022]
Affiliation(s)
- John T. Eagan
- Cardiovascular Associates of the Southeast, LLC; Birmingham Alabama
| | | | - Gary S. Roubin
- Cardiovascular Associates of the Southeast, LLC; Birmingham Alabama
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16
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Weeden CE, Asselin-Labat ML. Mechanisms of DNA damage repair in adult stem cells and implications for cancer formation. Biochim Biophys Acta Mol Basis Dis 2017; 1864:89-101. [PMID: 29038050 DOI: 10.1016/j.bbadis.2017.10.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/06/2017] [Accepted: 10/11/2017] [Indexed: 02/06/2023]
Abstract
Maintenance of genomic integrity in tissue-specific stem cells is critical for tissue homeostasis and the prevention of deleterious diseases such as cancer. Stem cells are subject to DNA damage induced by endogenous replication mishaps or exposure to exogenous agents. The type of DNA lesion and the cell cycle stage will invoke different DNA repair mechanisms depending on the intrinsic DNA repair machinery of a cell. Inappropriate DNA repair in stem cells can lead to cell death, or to the formation and accumulation of genetic alterations that can be transmitted to daughter cells and so is linked to cancer formation. DNA mutational signatures that are associated with DNA repair deficiencies or exposure to carcinogenic agents have been described in cancer. Here we review the most recent findings on DNA repair pathways activated in epithelial tissue stem and progenitor cells and their implications for cancer mutational signatures. We discuss how deep knowledge of early molecular events leading to carcinogenesis provides insights into DNA repair mechanisms operating in tumours and how these could be exploited therapeutically.
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Affiliation(s)
- Clare E Weeden
- ACRF Stem Cells and Cancer Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia; Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Marie-Liesse Asselin-Labat
- ACRF Stem Cells and Cancer Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia; Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia.
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DiCarlo AL, Tamarat R, Rios CI, Benderitter M, Czarniecki CW, Allio TC, Macchiarini F, Maidment BW, Jourdain JR. Cellular Therapies for Treatment of Radiation Injury: Report from a NIH/NIAID and IRSN Workshop. Radiat Res 2017; 188:e54-e75. [PMID: 28605260 DOI: 10.1667/rr14810.1] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In recent years, there has been increasing concern over the possibility of a radiological or nuclear incident occurring somewhere in the world. Intelligence agencies frequently report that terrorist groups and rogue nations are seeking to obtain radiological or nuclear weapons of mass destruction. In addition, there exists the real possibility that safety of nuclear power reactors could be compromised by natural (such as the tsunami and subsequent Fukushima accident in Japan in March, 2011) or accidental (Three Mile Island, 1979 and Chernobyl, 1986) events. Although progress has been made by governments around the world to prepare for these events, including the stockpiling of radiation countermeasures, there are still challenges concerning care of patients injured during a radiation incident. Because the deleterious and pathological effects of radiation are so broad, it is desirable to identify medical countermeasures that can have a beneficial impact on several tissues and organ systems. Cellular therapies have the potential to impact recovery and tissue/organ regeneration for both early and late complications of radiation exposure. These therapies, which could include stem or blood progenitor cells, mesenchymal stromal cells (MSCs) or cells derived from other tissues (e.g., endothelium or placenta), have shown great promise in treating other nonradiation injuries to and diseases of the bone marrow, skin, gastrointestinal tract, brain, lung and heart. To explore the potential use of these therapies in the treatment of victims after acute radiation exposure, the National Institute of Allergy and Infectious Diseases co-sponsored an international workshop in July, 2015 in Paris, France with the Institut de Radioprotection et de Sûreté Nucléaire. The workshop included discussions of data available from testing in preclinical models of radiation injury to different organs, logistics associated with the practical use of cellular therapies for a mass casualty incident, as well as international regulatory requirements for authorizing such drug products to be legally and readily used in such incidents. This report reviews the data presented, as well as key discussion points from the meeting.
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Affiliation(s)
- Andrea L DiCarlo
- a Radiation and Nuclear Countermeasures Program (RNCP), Division of Allergy, Immunology and Transplantation (DAIT), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville, Maryland
| | - Radia Tamarat
- b Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Fontenay-aux-Roses, France
| | - Carmen I Rios
- a Radiation and Nuclear Countermeasures Program (RNCP), Division of Allergy, Immunology and Transplantation (DAIT), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville, Maryland
| | - Marc Benderitter
- b Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Fontenay-aux-Roses, France
| | | | | | - Francesca Macchiarini
- e Previously -RNCP, DAIT, NIAID, NIH; now National Institute on Aging (NIA), NIH, Bethesda, Maryland
| | | | - Jean-Rene Jourdain
- b Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Fontenay-aux-Roses, France
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