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Pavletić B, Runzheimer K, Siems K, Koch S, Cortesão M, Ramos-Nascimento A, Moeller R. Spaceflight Virology: What Do We Know about Viral Threats in the Spaceflight Environment? ASTROBIOLOGY 2022; 22:210-224. [PMID: 34981957 PMCID: PMC8861927 DOI: 10.1089/ast.2021.0009] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Viruses constitute a significant part of the human microbiome, so wherever humans go, viruses are brought with them, even on space missions. In this mini review, we focus on the International Space Station (ISS) as the only current human habitat in space that has a diverse range of viral genera that infect microorganisms from bacteria to eukaryotes. Thus, we have reviewed the literature on the physical conditions of space habitats that have an impact on both virus transmissibility and interaction with their host, which include UV radiation, ionizing radiation, humidity, and microgravity. Also, we briefly comment on the practices used on space missions that reduce virus spread, that is, use of antimicrobial surfaces, spacecraft sterilization practices, and air filtration. Finally, we turn our attention to the health threats that viruses pose to space travel. Overall, even though efforts are taken to ensure safe conditions during human space travel, for example, preflight quarantines of astronauts, we reflect on the potential risks humans might be exposed to and how those risks might be aggravated in extraterrestrial habitats.
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Affiliation(s)
- Bruno Pavletić
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology Research Group, Linder Hoehe, Cologne (Köln), Germany
| | - Katharina Runzheimer
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology Research Group, Linder Hoehe, Cologne (Köln), Germany
| | - Katharina Siems
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology Research Group, Linder Hoehe, Cologne (Köln), Germany
| | - Stella Koch
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology Research Group, Linder Hoehe, Cologne (Köln), Germany
| | - Marta Cortesão
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology Research Group, Linder Hoehe, Cologne (Köln), Germany
| | - Ana Ramos-Nascimento
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology Research Group, Linder Hoehe, Cologne (Köln), Germany
| | - Ralf Moeller
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology Research Group, Linder Hoehe, Cologne (Köln), Germany
- Address correspondence to: Ralf Moeller, German Aerospace Center (DLR), Institute of Aerospace Medicine, Radiation Biology Department, Aerospace Microbiology, Linder Hoehe, Building 24, Room 104, D-51147 Köln, Germany
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Berry G, Parsons A, Morgan M, Rickert J, Cho H. A review of methods to reduce the probability of the airborne spread of COVID-19 in ventilation systems and enclosed spaces. ENVIRONMENTAL RESEARCH 2022; 203:111765. [PMID: 34331921 PMCID: PMC8317458 DOI: 10.1016/j.envres.2021.111765] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/22/2021] [Accepted: 07/23/2021] [Indexed: 05/19/2023]
Abstract
COVID-19 forced the human population to rethink its way of living. The threat posed by the potential spread of the virus via an airborne transmission mode through ventilation systems in buildings and enclosed spaces has been recognized as a major concern. To mitigate this threat, researchers have explored different technologies and methods that can remove or decrease the concentration of the virus in ventilation systems and enclosed spaces. Although many technologies and methods have already been researched, some are currently available on the market, but their effectiveness and safety concerns have not been fully investigated. To acquire a broader view and collective perspective of the current research and development status, this paper discusses a comprehensive review of various workable technologies and methods to combat airborne viruses, e.g., COVID-19, in ventilation systems and enclosed spaces. These technologies and methods include an increase in ventilation, high-efficiency air filtration, ionization of the air, environmental condition control, ultraviolet germicidal irradiation, non-thermal plasma and reactive oxygen species, filter coatings, chemical disinfectants, and heat inactivation. Research gaps have been identified and discussed, and recommendations for applying such technologies and methods have also been provided in this article.
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Affiliation(s)
- Gentry Berry
- Institute for Clean Energy Technology, Mississippi State University, 205 Research Blvd, Starkville, MS, 39759, USA
| | - Adam Parsons
- Institute for Clean Energy Technology, Mississippi State University, 205 Research Blvd, Starkville, MS, 39759, USA
| | - Matthew Morgan
- Institute for Clean Energy Technology, Mississippi State University, 205 Research Blvd, Starkville, MS, 39759, USA
| | - Jaime Rickert
- Institute for Clean Energy Technology, Mississippi State University, 205 Research Blvd, Starkville, MS, 39759, USA
| | - Heejin Cho
- Institute for Clean Energy Technology, Mississippi State University, 205 Research Blvd, Starkville, MS, 39759, USA.
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3
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Mukherjee SB, Gorohovski A, Merzon E, Levy E, Mukherjee S, Frenkel‐Morgenstern M. Seasonal UV exposure and vitamin D: association with the dynamics of COVID-19 transmission in Europe. FEBS Open Bio 2022; 12:106-117. [PMID: 34608759 PMCID: PMC8653358 DOI: 10.1002/2211-5463.13309] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 09/12/2021] [Accepted: 10/04/2021] [Indexed: 12/23/2022] Open
Abstract
Several recent studies have demonstrated that low plasma 25(OH) vitamin D levels are associated with the risk of COVID-19 infection. The primary source of vitamin D production in humans is environmental UV radiation. In many viral respiratory diseases, peak infection rates are observed during winter due to reduced UV exposure and low temperatures. In Europe, the second wave of COVID-19 began early in the winter of 2020. Investigating the impact of seasonal temperature and UV exposure on COVID-19 transmission could thus aid in prevention and intervention. As such, we first performed a comprehensive meta-analysis of all related published literature based on the association between vitamin D and COVID-19, which supported the hypothesis that the low vitamin D level is a critical risk factor for COVID-19 infection. Next, to understand the potential impact of seasonal UV and temperature levels on COVID-19 cases, we analyzed meteorological data and daily COVID-19 cases per million in the populations of 26 European countries. We observed that low temperature, UV index, and cloud-free vitamin D UV dose (UVDVF) levels are negatively correlated with COVID-19 prevalence in Europe. Furthermore, a distributed lag nonlinear model was used to assess the nonlinear delayed effects of individual seasonal factors on COVID-19 cases. Such analysis highlighted the significantly delayed impact of UVDVF on the cumulative relative risk of COVID-19 infection. The findings of this study suggest that low UV exposure can affect the required production of vitamin D in the body, which substantially influences the dynamics of COVID-19 transmission and severity.
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Affiliation(s)
- Sunanda Biswas Mukherjee
- Cancer Genomics and BioComputing of Complex Diseases LabAzrieli Faculty of MedicineBar‐Ilan UniversitySafedIsrael
| | - Alessandro Gorohovski
- Cancer Genomics and BioComputing of Complex Diseases LabAzrieli Faculty of MedicineBar‐Ilan UniversitySafedIsrael
| | - Eugene Merzon
- Leumit Health ServicesTel AvivIsrael
- Department of Family MedicineSackler School of MedicineTel Aviv UniversityIsrael
| | - Eliad Levy
- Cancer Genomics and BioComputing of Complex Diseases LabAzrieli Faculty of MedicineBar‐Ilan UniversitySafedIsrael
| | - Sumit Mukherjee
- Cancer Genomics and BioComputing of Complex Diseases LabAzrieli Faculty of MedicineBar‐Ilan UniversitySafedIsrael
| | - Milana Frenkel‐Morgenstern
- Cancer Genomics and BioComputing of Complex Diseases LabAzrieli Faculty of MedicineBar‐Ilan UniversitySafedIsrael
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4
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Farah N, Chin VK, Chong PP, Lim WF, Lim CW, Basir R, Chang SK, Lee TY. Riboflavin as a promising antimicrobial agent? A multi-perspective review. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100111. [PMID: 35199072 PMCID: PMC8848291 DOI: 10.1016/j.crmicr.2022.100111] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 02/05/2022] [Accepted: 02/07/2022] [Indexed: 12/29/2022] Open
Abstract
Riboflavin demonstrates antioxidant and photosensitizing properties. Riboflavin is able to induce ROS and modulate immune response. Riboflavin possesses potent antimicrobial activity when used alone or combined with other anti-infectives. The riboflavin biosynthesis pathway serves as an ideal drug target against microbes. UVA combination with riboflavin exhibits remarkable antimicrobial effects.
Riboflavin, or more commonly known as vitamin B2, forms part of the component of vitamin B complex. Riboflavin consisting of two important cofactors, flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), which are involved in multiple oxidative-reduction processes and energy metabolism. Besides maintaining human health, different sources reported that riboflavin can inhibit or inactivate the growth of different pathogens including bacteria, viruses, fungi and parasites, highlighting the possible role of riboflavin as an antimicrobial agent. Moreover, riboflavin and flavins could produce reactive oxygen species (ROS) when exposed to light, inducing oxidative damage in cells and tissues, and thus are excellent natural photosensitizers. Several studies have illustrated the therapeutic efficacy of photoactivated riboflavin against nosocomial infections and multidrug resistant bacterial infections as well as microbial associated biofilm infections, revealing the potential role of riboflavin as a promising antimicrobial candidate, which could serve as one of the alternatives in fighting the global crisis of the emergence of antimicrobial resistance seen in different pathogenic microbes. Riboflavin could also be involved in modulating host immune responses, which might increase the pathogen clearance from host cells and increase host defense against microbial infections. Thus, the dual effects of riboflavin on both pathogens and host immunity, reflected by its potent bactericidal effect and alleviation of inflammation in host cells further imply that riboflavin could be a potential candidate for therapeutic intervention in resolving microbial infections. Hence, this review aimed to provide some insights on the promising role of riboflavin as an antimicrobial candidate and also a host immune-modulator from a multi-perspective view as well as to discuss the application and challenges on using riboflavin in photodynamic therapy against various pathogens and microbial biofilm-associated infections.
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Affiliation(s)
- Nuratiqah Farah
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, UPM, 43400, Serdang, Selangor, Malaysia
| | - Voon Kin Chin
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, UPM, 43400, Serdang, Selangor, Malaysia
| | - Pei Pei Chong
- School of Biosciences, Taylor's University, No 1, Jalan Taylor's, 47500 Subang Jaya, Selangor, Malaysia
| | - Wai Feng Lim
- Integrative Pharmacogenomics Institute (iPROMISE), Universiti Teknologi MARA, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor, Malaysia
| | - Chee Woei Lim
- Department of Medicine, Faculty of Medicine and Health Sciences, UPM, 43400, Serdang, Selangor, Malaysia
| | - Rusliza Basir
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, UPM, 43400, Serdang, Selangor, Malaysia
| | - Sui Kiat Chang
- Department of Horticulture, Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture. South China Botanical Garden, Chinese Academy of Sciences. Guangzhou, 510650 China
| | - Tze Yan Lee
- Perdana University School of Liberal Arts, Science and Technology (PUScLST), Suite 9.2, 9th Floor, Wisma Chase Perdana, Changkat Semantan, Damansara Heights, 50490 Kuala Lumpur, Malaysia
- Corresponding author.
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5
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Ng JQ, Chia SY, Koh MJA. Vesicular eruption in a teenager on oral isotretinoin for acne. Pediatr Dermatol 2021; 38:1318-1319. [PMID: 34750875 DOI: 10.1111/pde.14744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing Qi Ng
- Dermatology Service, KK Women's and Children's Hospital, Singapore, Singapore
| | - Shi Yun Chia
- Dermatology Service, KK Women's and Children's Hospital, Singapore, Singapore.,General Pediatrics Service, KK Women's and Children's Hospital, Singapore, Singapore
| | - Mark Jean Aan Koh
- Dermatology Service, KK Women's and Children's Hospital, Singapore, Singapore
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6
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Gorman S, Weller RB. Investigating the Potential for Ultraviolet Light to Modulate Morbidity and Mortality From COVID-19: A Narrative Review and Update. Front Cardiovasc Med 2020; 7:616527. [PMID: 33426009 PMCID: PMC7786057 DOI: 10.3389/fcvm.2020.616527] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 11/26/2020] [Indexed: 12/16/2022] Open
Abstract
During the COVID-19 (coronavirus disease of 2019) pandemic, researchers have been seeking low-cost and accessible means of providing protection from its harms, particularly for at-risk individuals such as those with cardiovascular disease, diabetes and obesity. One possible way is via safe sun exposure, and/or dietary supplementation with induced beneficial mediators (e.g., vitamin D). In this narrative review, we provide rationale and updated evidence on the potential benefits and harms of sun exposure and ultraviolet (UV) light that may impact COVID-19. We review recent studies that provide new evidence for any benefits (or otherwise) of UV light, sun exposure, and the induced mediators, vitamin D and nitric oxide, and their potential to modulate morbidity and mortality induced by infection with SARS-CoV-2 (severe acute respiratory disease coronavirus-2). We identified substantial interest in this research area, with many commentaries and reviews already published; however, most of these have focused on vitamin D, with less consideration of UV light (or sun exposure) or other mediators such as nitric oxide. Data collected to-date suggest that ambient levels of both UVA and UVB may be beneficial for reducing severity or mortality due to COVID-19, with some inconsistent findings. Currently unresolved are the nature of the associations between blood 25-hydroxyvitamin D and COVID-19 measures, with more prospective data needed that better consider lifestyle factors, such as physical activity and personal sun exposure levels. Another short-coming has been a lack of measurement of sun exposure, and its potential to influence COVID-19 outcomes. We also discuss possible mechanisms by which sun exposure, UV light and induced mediators could affect COVID-19 morbidity and mortality, by focusing on likely effects on viral pathogenesis, immunity and inflammation, and potential cardiometabolic protective mechanisms. Finally, we explore potential issues including the impacts of exposure to high dose UV radiation on COVID-19 and vaccination, and effective and safe doses for vitamin D supplementation.
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Affiliation(s)
- Shelley Gorman
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Richard B. Weller
- Centre for Inflammation Research, University of Edinburgh, Edinburgh, United Kingdom
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7
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Raeiszadeh M, Adeli B. A Critical Review on Ultraviolet Disinfection Systems against COVID-19 Outbreak: Applicability, Validation, and Safety Considerations. ACS PHOTONICS 2020; 7:2941-2951. [PMID: 37556269 PMCID: PMC7571309 DOI: 10.1021/acsphotonics.0c01245] [Citation(s) in RCA: 156] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Indexed: 05/19/2023]
Abstract
The global health-threatening crisis from the COVID-19 pandemic, caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), highlights the scientific and engineering potentials of applying ultraviolet (UV) disinfection technologies for biocontaminated air and surfaces as the major media for disease transmission. Nowadays, various environmental public settings worldwide, from hospitals and health care facilities to shopping malls and airports, are considering implementation of UV disinfection devices for disinfection of frequently touched surfaces and circulating air streams. Moreover, the general public utilizes UV sterilization devices for various surfaces, from doorknobs and keypads to personal protective equipment, or air purification devices with an integrated UV disinfection technology. However, limited understanding of critical UV disinfection aspects can lead to improper use of this promising technology. In this work, fundamentals of UV disinfection phenomena are addressed; furthermore, the essential parameters and protocols to guarantee the efficacy of the UV sterilization process in a human-safe manner are systematically elaborated. In addition, the latest updates from the open literature on UV dose requirements for incremental log removal of SARS-CoV-2 are reviewed remarking the advancements and existing knowledge gaps. This study, along with the provided illustrations, will play an essential role in the design and fabrication of effective, reliable, and safe UV disinfection systems applicable to preventing viral contagion in the current COVID-19 pandemic, as well as potential future epidemics.
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Affiliation(s)
- Milad Raeiszadeh
- Department of Chemical and Biological
Engineering, The University of British
Columbia, Vancouver, BC V6T 1Z4,
Canada
- Department of Research and
Development, Acuva Technologies, Burnaby,
BC V5J 5G5, Canada
| | - Babak Adeli
- Department of Research and
Development, Acuva Technologies, Burnaby,
BC V5J 5G5, Canada
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8
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Elmasry MF, Youssef R, Elbendary A, Helmy K, Abdelkader HA. Cutaneous lymphomas and COVID-19: What is known so far? Dermatol Ther 2020; 34:e14463. [PMID: 33112053 DOI: 10.1111/dth.14463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/13/2020] [Accepted: 10/23/2020] [Indexed: 01/08/2023]
Abstract
The Coronavirus disease 2019 (COVID-19) pandemic spreads quickly all over the world. There are no sufficient data in the literature about COVID-19 infection and cutaneous lymphomas. This review sheds the light on what is known so far about COVID-19 with a cutaneous lymphoma perspective. Cutaneous T-cell lymphoma (CTCL) diagnosis does not represent a predisposing factor to viral infections and most of CTCL patients have indolent disease. However, physicians should be cautious with patients with aggressive primary cutaneous lymphomas and advanced CTCL. Different treatment strategies for cutaneous lymphomas should be taken into consideration during the COVID-19 pandemic. Thus, it is highly needed to estimate the benefit-to-risk ratio on a case-by-case basis.
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Affiliation(s)
- Maha Fathy Elmasry
- Faculty of Medicine, Department of Dermatology, Cutaneous Lymphoma Clinic, Cairo University, Egypt
| | - Randa Youssef
- Faculty of Medicine, Department of Dermatology, Cutaneous Lymphoma Clinic, Cairo University, Egypt
| | - Amira Elbendary
- Faculty of Medicine, Department of Dermatology, Cutaneous Lymphoma Clinic, Cairo University, Egypt
| | - Kholoud Helmy
- Faculty of Medicine, Department of Dermatology, Cutaneous Lymphoma Clinic, Cairo University, Egypt
| | - Heba Ahmed Abdelkader
- Faculty of Medicine, Department of Dermatology, Cutaneous Lymphoma Clinic, Cairo University, Egypt
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9
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Mai ZM, Lin JH, Ngan RKC, Kwong DLW, Ng WT, Ng AWY, Ip KM, Chan YH, Lee AWM, Ho SY, Lung ML, Lam TH. Solar Ultraviolet Radiation and Vitamin D Deficiency on Epstein-Barr Virus Reactivation: Observational and Genetic Evidence From a Nasopharyngeal Carcinoma-Endemic Population. Open Forum Infect Dis 2020; 7:ofaa426. [PMID: 33134413 PMCID: PMC7585328 DOI: 10.1093/ofid/ofaa426] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/11/2020] [Indexed: 12/22/2022] Open
Abstract
Background We investigated the relationship of Epstein-Barr virus viral capsid antigen (EBV VCA-IgA) serostatus with ambient and personal ultraviolet radiation (UVR) and vitamin D exposure. Methods Using data from a multicenter case-control study, we included 1026 controls subjects in 2014–2017 in Hong Kong, China. Odds ratios (ORs) and 95% confidence intervals (CIs) of the association between UVR exposure and EBV VCA-IgA (seropositivity vs seronegativity) were calculated using unconditional logistic regression models adjusted for potential confounders. Results We observed a large increase in seropositivity of EBV VCA-IgA in association with duration of sunlight exposures at both 10 years before recruitment and age 19–30 years (adjusted OR = 3.59, 95% CI = 1.46–8.77; and adjusted OR = 2.44, 95% CI = 1.04–5.73 for ≥8 vs <2 hours/day; P for trend = .005 and .048, respectively). However, no association of EBV VCA-IgA serostatus with other indicators of UVR exposure was found. In addition, both circulating 25-hydroxyvitamin D (25OHD) and genetic predicted 25OHD were not associated with EBV VCA-IgA serostatus. Conclusions Our results suggest that personal UVR exposure may be associated with higher risk of EBV reactivation, but we did not find clear evidence of vitamin D exposure (observational or genetic), a molecular mediator of UVR exposure. Further prospective studies in other populations are needed to confirm this finding and to explore the underlying biological mechanisms. Information on photosensitizing agents, and serological markers of EBV, and biomarkers related to systemic immunity and inflammation should be collected and are also highly relevant in future studies.
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Affiliation(s)
- Zhi-Ming Mai
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region (SAR), China.,Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China
| | - Jia-Huang Lin
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region (SAR), China.,Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China
| | - Roger Kai-Cheong Ngan
- Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China.,Department of Clinical Oncology, The University of Hong Kong, Hong Kong SAR, China.,Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong SAR, China
| | - Dora Lai-Wan Kwong
- Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China.,Department of Clinical Oncology, The University of Hong Kong, Hong Kong SAR, China
| | - Wai-Tong Ng
- Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China.,Department of Clinical Oncology, Pamela Youde Nethersole Eastern Hospital, Hong Kong SAR, China
| | - Alice Wan-Ying Ng
- Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China.,Department of Clinical Oncology, Tuen Mun Hospital, Hong Kong SAR, China
| | - Kai-Ming Ip
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region (SAR), China.,Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China
| | - Yap-Hang Chan
- Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China.,Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong SAR, China
| | - Anne Wing-Mui Lee
- Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China.,Department of Clinical Oncology, The University of Hong Kong, Hong Kong SAR, China
| | - Sai-Yin Ho
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region (SAR), China
| | - Maria Li Lung
- Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China.,Department of Clinical Oncology, The University of Hong Kong, Hong Kong SAR, China
| | - Tai-Hing Lam
- School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region (SAR), China.,Centre for Nasopharyngeal Carcinoma Research, Research Grants Council Area of Excellence Scheme, The University of Hong Kong, Hong Kong SAR, China
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10
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Seasonality of herpes zoster and herpes zoster ophthalmicus. J Clin Virol 2020; 126:104306. [PMID: 32151977 DOI: 10.1016/j.jcv.2020.104306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 02/19/2020] [Accepted: 02/25/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND Herpes zoster (HZ) and herpes zoster ophthalmicus (HZO) are common and debilitating diseases. There is no consensus in the literature whether HZ and HZO exhibit seasonal patterns. OBJECTIVES To determine whether HZ and HZO are seasonal. STUDY DESIGN All patients in the OptumLabs® Data Warehouse (OLDW), a longitudinal, insurance claims database with de-identified lives between January 1, 2006 and December 31, 2017 with 365 days or more of continuous enrollment were considered in the study. The database was queried for patients reporting a new ICD-9/ICD-10 code for HZ or HZO and monthly counts of each administrative code were modeled using Morelet wavelets and analyzed for annual periodicity using Fisher's g test. RESULTS There were a total of 513,911 new cases of HZ during this time period; 40,166 cases (7.8 %) were reported as HZO. Administrative coding for new cases of HZ exhibited annual periodicity (P < .001) with a peak in the summer. No periodicity was evident for HZO. CONCLUSIONS These results contribute to a growing body of evidence suggesting that HZ may be seasonal and help characterize the epidemiology of this common, painful disease.
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11
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Grandi C, D’Ovidio MC. Balance between Health Risks and Benefits for Outdoor Workers Exposed to Solar Radiation: An Overview on the Role of Near Infrared Radiation Alone and in Combination with Other Solar Spectral Bands. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E1357. [PMID: 32093162 PMCID: PMC7068431 DOI: 10.3390/ijerph17041357] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/13/2020] [Accepted: 02/15/2020] [Indexed: 12/31/2022]
Abstract
Near infrared or infrared A (IRA) accounts for over 40% of the solar spectrum (SS) and is able to reach subcutaneous tissue as well as the retina. Outdoor workers are occupationally exposed to solar radiation (SR), but the level of exposure may differ widely depending on the job performed, time spent outdoors, latitude, altitude, season, personal protection, etc. Until now, risk assessment and management for outdoor workers has focused on the prevention of both acute and long-term effects on the eye and the skin due to solar ultraviolet radiation (UVR) with little consideration of the other components of the SS (a possible exception is represented by visible radiation with reference to the eye). A growing body of evidence coming from in vitro studies indicates that IRA is involved in cellular reactive oxygen species (ROS) production and may interfere with the respiratory chain in the mitochondria. Moreover, it can modulate gene expression and some metabolic pathways. The biological action of IRA is only partly attributable to a thermal mechanism, should it be also involved in photochemical ones. The cellular and molecular pathways affected by IRA are partly similar and partly different with respect to those involved in the case of visible ultraviolet A (UVA) and ultraviolet B (UVB) radiation. Consequently, the net effect of the SS is very difficult to predict at different levels of the biological organization, making more difficult the final balance of health risk and benefits (for the skin, eye, immune system, blood pressure, etc.) in a given exposure situation. Moreover, few in vivo studies and no epidemiological data are presently available in this regard. Investigating this topic may contribute to better defining the individual exposome. More practically, it is expected to bring benefits to the risk assessment and management for outdoor workers exposed to SS, contributing to: (1) better definition of the individual profiles of susceptibility, (2) more focused preventive and protective measures, (3) better implementation of the health surveillance and (4) a more effective information and training.
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Affiliation(s)
- Carlo Grandi
- Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers’ Compensation Authority (INAIL), 00078 Monte Porzio Catone, Rome, Italy;
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12
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Kawai K, VoPham T, Drucker A, Curhan SG, Curhan GC. Ultraviolet Radiation Exposure and the Risk of Herpes Zoster in Three Prospective Cohort Studies. Mayo Clin Proc 2020; 95:283-292. [PMID: 31883695 PMCID: PMC7007833 DOI: 10.1016/j.mayocp.2019.08.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 06/25/2019] [Accepted: 08/09/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To examine the association between ultraviolet radiation (UVR) exposure and the risk of herpes zoster (HZ) in 3 prospective cohorts. PATIENTS AND METHODS We included 205,756 participants from the Health Professionals Follow-up Study (HPFS; 1986-2008), Nurses' Health Study (NHS; 1996-2012), and Nurses' Health Study II (NHS II; 1991-2013). Ambient UVR exposure was based on updated geocoded address histories linked with a high-resolution spatiotemporal ultraviolet model. Incident HZ cases were identified by self-reported clinician diagnosis. Sunburn history and medical, lifestyle, and dietary factors were assessed using biennial questionnaires. Multivariable Cox proportional hazards models were used. RESULTS A total of 24,201 cases of HZ occurred during 3,626,131 person-years. Ambient UVR exposure was associated with a higher risk of HZ in men (HPFS: multivariable-adjusted hazard ratio [MVHR] comparing highest vs lowest quintiles, 1.14; 95% CI, 1.02-1.29; P=.03 for trend) but not in women (NHS: MVHR, 0.99; 95% CI, 0.93-1.05; NHS II: MVHR, 0.96; 95% CI, 0.90-1.03). A higher lifetime number of severe sunburns was associated with a higher risk of HZ in all cohorts (HPFS: MVHR for ≥10 sunburns vs none, 1.08; 95% CI, 0.96-1.20; P=.02 for trend; NHS: MVHR, 1.14; 95% CI, 1.05-1.22; P=.01 for trend; NHS II: MVHR, 1.13; 95% CI, 1.00-1.28; P<.001 for trend). CONCLUSION Ambient UVR exposure was associated with a higher risk of HZ in men but not in women. A history of severe sunburn was associated with a modest increased risk of HZ in men and women, possibly because of immunosuppression from overexposure to the sun.
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Affiliation(s)
- Kosuke Kawai
- Institutional Centers for Clinical and Translational Research, Boston Children's Hospital, Boston, MA; Harvard Medical School, Boston, MA.
| | - Trang VoPham
- Epidemiology Program, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Aaron Drucker
- Department of Medicine, University of Toronto, Ontario, Canada; Women's College Research Institute, Toronto, Ontario, Canada; Department of Medicine, Division of Dermatology, Women's College Hospital, Toronto, Ontario, Canada
| | - Sharon G Curhan
- Harvard Medical School, Boston, MA; Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, MA
| | - Gary C Curhan
- Harvard Medical School, Boston, MA; Department of Medicine, Renal Division, Brigham and Women's Hospital, Boston, MA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA
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Hart PH, Norval M, Byrne SN, Rhodes LE. Exposure to Ultraviolet Radiation in the Modulation of Human Diseases. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2018; 14:55-81. [PMID: 30125148 DOI: 10.1146/annurev-pathmechdis-012418-012809] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This review focuses primarily on the beneficial effects for human health of exposure to ultraviolet radiation (UVR). UVR stimulates anti-inflammatory and immunosuppressive pathways in skin that modulate psoriasis, atopic dermatitis, and vitiligo; suppresses cutaneous lesions of graft-versus-host disease; and regulates some infection and vaccination outcomes. While polymorphic light eruption and the cutaneous photosensitivity of systemic lupus erythematosus are triggered by UVR, polymorphic light eruption also frequently benefits from UVR-induced immunomodulation. For systemic diseases such as multiple sclerosis, type 1 diabetes, asthma, schizophrenia, autism, and cardiovascular disease, any positive consequences of UVR exposure are more speculative, but could occur through the actions of UVR-induced regulatory cells and mediators, including 1,25-dihydroxy vitamin D3, interleukin-10, and nitric oxide. Reduced UVR exposure is a risk factor for the development of several inflammatory, allergic, and autoimmune conditions, including diseases initiated in early life. This suggests that UVR-induced molecules can regulate cell maturation in developing organs.
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Affiliation(s)
- Prue H Hart
- Telethon Kids Institute, University of Western Australia, Perth, Western Australia 6008, Australia;
| | - Mary Norval
- University of Edinburgh Medical School, Edinburgh EH8 9AG, United Kingdom;
| | - Scott N Byrne
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales 2006, Australia; .,Westmead Institute for Medical Research, Westmead, New South Wales 2145, Australia
| | - Lesley E Rhodes
- Centre for Dermatology Research, Division of Musculoskeletal and Dermatological Sciences, School of Biological Sciences, and Faculty of Biology, Medicine, and Health, The University of Manchester and Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9PL, United Kingdom;
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Colston JM, Ahmed T, Mahopo C, Kang G, Kosek M, de Sousa Junior F, Shrestha PS, Svensen E, Turab A, Zaitchik B. Evaluating meteorological data from weather stations, and from satellites and global models for a multi-site epidemiological study. ENVIRONMENTAL RESEARCH 2018; 165:91-109. [PMID: 29684739 PMCID: PMC6024078 DOI: 10.1016/j.envres.2018.02.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 02/07/2018] [Accepted: 02/19/2018] [Indexed: 05/03/2023]
Abstract
BACKGROUND Longitudinal and time series analyses are needed to characterize the associations between hydrometeorological parameters and health outcomes. Earth Observation (EO) climate data products derived from satellites and global model-based reanalysis have the potential to be used as surrogates in situations and locations where weather-station based observations are inadequate or incomplete. However, these products often lack direct evaluation at specific sites of epidemiological interest. METHODS Standard evaluation metrics of correlation, agreement, bias and error were applied to a set of ten hydrometeorological variables extracted from two quasi-global, commonly used climate data products - the Global Land Data Assimilation System (GLDAS) and Climate Hazards Group InfraRed Precipitation with Stations (CHIRPS) - to evaluate their performance relative to weather-station derived estimates at the specific geographic locations of the eight sites in a multi-site cohort study. These metrics were calculated for both daily estimates and 7-day averages and for a rotavirus-peak-season subset. Then the variables from the two sources were each used as predictors in longitudinal regression models to test their association with rotavirus infection in the cohort after adjusting for covariates. RESULTS The availability and completeness of station-based validation data varied depending on the variable and study site. The performance of the two gridded climate models varied considerably within the same location and for the same variable across locations, according to different evaluation criteria and for the peak-season compared to the full dataset in ways that showed no obvious pattern. They also differed in the statistical significance of their association with the rotavirus outcome. For some variables, the station-based records showed a strong association while the EO-derived estimates showed none, while for others, the opposite was true. CONCLUSION Researchers wishing to utilize publicly available climate data - whether EO-derived or station based - are advised to recognize their specific limitations both in the analysis and the interpretation of the results. Epidemiologists engaged in prospective research into environmentally driven diseases should install their own weather monitoring stations at their study sites whenever possible, in order to circumvent the constraints of choosing between distant or incomplete station data or unverified EO estimates.
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Affiliation(s)
- Josh M Colston
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
| | - Tahmeed Ahmed
- Nutrition & Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B), Dhaka, Bangladesh.
| | - Cloupas Mahopo
- Department of Nutrition, University of Venda, South Africa.
| | | | - Margaret Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
| | | | - Prakash Sunder Shrestha
- Department of Child Health, Institute of Medicine of Tribhuvan University, Kathmandu, Nepal.
| | | | - Ali Turab
- Research and Development, Maternal and Child Health (MCH) Program, Karachi, Pakistan.
| | - Benjamin Zaitchik
- Department of Earth and Planetary Sciences, Johns Hopkins Krieger School of Arts and Sciences, Baltimore, MD, USA.
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15
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Reichrath J, Saternus R, Vogt T. Challenge and perspective: the relevance of ultraviolet (UV) radiation and the vitamin D endocrine system (VDES) for psoriasis and other inflammatory skin diseases. Photochem Photobiol Sci 2018; 16:433-444. [PMID: 28054069 DOI: 10.1039/c6pp00280c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
During evolution, the ability of many organisms to synthesize vitamin D photochemically represented, and still represents, a major driving factor for the development of life on earth. In humans because not more than 10-20% of the requirement of vitamin D can be satisfied by the diet (under most living conditions in the US and Europe), the remaining 80-90% need to be photochemically synthesized in the skin through the action of solar or artificial ultraviolet-B (UV-B) radiation. The skin is a key organ of the human body's vitamin D endocrine system (VDES), representing both the site of vitamin D synthesis and a target tissue for biologically active vitamin D metabolites. Human keratinocytes contain the enzymatic machinery (CYP27B1) for the synthesis of the biologically most active natural vitamin D metabolite 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), representing an autonomous vitamin D3 pathway. Cutaneous production of 1,25(OH)2D3 may mediate intracrine, autocrine and paracrine effects on keratinocytes and on neighboring cells. Many skin cells (including keratinocytes, sebocytes, fibroblasts, melanocytes, macrophages and other skin immune cells) express the vitamin D receptor (VDR), an absolute pre-requisite for exerting genomic effects of 1,25(OH)2D3 and analogs. The VDR is a member of the superfamily of trans-acting transcriptional regulatory factors, which also contains the steroid and thyroid hormone receptors as well as the retinoid-X receptors (RXR) and retinoic acid receptors (RAR). A large body of evidence, including cDNA microarray analyses of mRNAs, indicates that as many as 500-1000 genes may be controlled by VDR ligands that regulate a broad variety of cellular functions including growth, differentiation, and apoptosis. Clinical and laboratory investigations, including the observation that 1,25(OH)2D3 is very effective in inducing the terminal differentiation and in inhibiting the proliferation of cultured human keratinocytes have resulted in the use of 1,25(OH)2D3 and analogs for the treatment of psoriasis. Focussing on the UV-induced cutaneous synthesis of vitamin D, this review gives an update on the relevance of the VDES and of UV radiation for the management of psoriasis and other inflammatory skin diseases.
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Affiliation(s)
- Jörg Reichrath
- Center for Clinical and Experimental Photo-Dermatology, The Saarland University Hospital, 66421 Homburg, Germany and Department of Dermatology, The Saarland University Hospital, 66421 Homburg, Germany.
| | - Roman Saternus
- Center for Clinical and Experimental Photo-Dermatology, The Saarland University Hospital, 66421 Homburg, Germany and Department of Dermatology, The Saarland University Hospital, 66421 Homburg, Germany.
| | - Thomas Vogt
- Center for Clinical and Experimental Photo-Dermatology, The Saarland University Hospital, 66421 Homburg, Germany and Department of Dermatology, The Saarland University Hospital, 66421 Homburg, Germany.
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16
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Atia R, Jouve L, Knoeri J, Georgeon C, Laroche L, Borderie V, Bouheraoua N. [Corneal collagen cross-linking to treat infectious keratitis]. J Fr Ophtalmol 2018; 41:560-568. [PMID: 29903589 DOI: 10.1016/j.jfo.2017.12.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 12/06/2017] [Accepted: 12/07/2017] [Indexed: 11/24/2022]
Abstract
Infectious keratitis are a frequent cause of ocular morbidity. Today, new treatments are necessary to combat the emergence of antibiotic resistant germs. Corneal collagen cross-linking has been suggested to treat corneal infectious (PACK-CXL). Its action would be both antimicrobial and protective for the cornea, increasing its biochemical resistence to proteolytic enzymes. In vivo, PACK-CXL might demonstrate good efficacy against bacterial keratitis, contrary to herpetic keratitis for which it is contraindicated. For fungal or amoebic keratitis, results are uncertain regarding its safety and efficacy. The purpose of this paper is to clarify the use of corneal collagen cross-linking to treat infectious keratitis.
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Affiliation(s)
- R Atia
- Service d'ophtalmologie 5, centre hospitalier national d'ophtalmologie des Quinze-Vingts, 28, rue de Charenton, 75012 Paris, France
| | - L Jouve
- Service d'ophtalmologie 5, centre hospitalier national d'ophtalmologie des Quinze-Vingts, 28, rue de Charenton, 75012 Paris, France
| | - J Knoeri
- Service d'ophtalmologie 5, centre hospitalier national d'ophtalmologie des Quinze-Vingts, 28, rue de Charenton, 75012 Paris, France
| | - C Georgeon
- Service d'ophtalmologie 5, centre hospitalier national d'ophtalmologie des Quinze-Vingts, 28, rue de Charenton, 75012 Paris, France
| | - L Laroche
- Service d'ophtalmologie 5, centre hospitalier national d'ophtalmologie des Quinze-Vingts, 28, rue de Charenton, 75012 Paris, France; Inserm UMR S 968, université Pierre-et-Marie-Curie-Paris-VI, institut de la vision, 75012 Paris, France
| | - V Borderie
- Service d'ophtalmologie 5, centre hospitalier national d'ophtalmologie des Quinze-Vingts, 28, rue de Charenton, 75012 Paris, France; Inserm UMR S 968, université Pierre-et-Marie-Curie-Paris-VI, institut de la vision, 75012 Paris, France
| | - N Bouheraoua
- Service d'ophtalmologie 5, centre hospitalier national d'ophtalmologie des Quinze-Vingts, 28, rue de Charenton, 75012 Paris, France; Inserm UMR S 968, université Pierre-et-Marie-Curie-Paris-VI, institut de la vision, 75012 Paris, France.
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Abstract
Preclinical infection model systems are extremely valuable tools to aid in our understanding of Human Papillomavirus (HPV) biology, disease progression, prevention, and treatments. In this context, rodent papillomaviruses and their respective infection models are useful tools but remain underutilized resources in the field of papillomavirus biology. Two rodent papillomaviruses, MnPV1, which infects the Mastomys species of multimammate rats, and MmuPV1, which infects laboratory mice, are currently the most studied rodent PVs. Both of these viruses cause malignancy in the skin and can provide attractive infection models to study the lesser understood cutaneous papillomaviruses that have been frequently associated with HPV-related skin cancers. Of these, MmuPV1 is the first reported rodent papillomavirus that can naturally infect the laboratory strain of mice. MmuPV1 is an attractive model virus to study papillomavirus pathogenesis because of the ubiquitous availability of lab mice and the fact that this mouse species is genetically modifiable. In this review, we have summarized the knowledge we have gained about PV biology from the study of rodent papillomaviruses and point out the remaining gaps that can provide new research opportunities.
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19
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Hong TS, Gray PJ, Allen JN, Shellito PC, Lowry KP, Zukerberg LR. Case 39-2016. A 74-Year-Old Man with Rectal Bleeding and a History of Prostate Cancer. N Engl J Med 2016; 375:2481-2488. [PMID: 28002705 DOI: 10.1056/nejmcpc1613458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Theodore S Hong
- From the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Massachusetts General Hospital, and the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Harvard Medical School - both in Boston
| | - Phillip J Gray
- From the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Massachusetts General Hospital, and the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Harvard Medical School - both in Boston
| | - Jill N Allen
- From the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Massachusetts General Hospital, and the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Harvard Medical School - both in Boston
| | - Paul C Shellito
- From the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Massachusetts General Hospital, and the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Harvard Medical School - both in Boston
| | - Kathryn P Lowry
- From the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Massachusetts General Hospital, and the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Harvard Medical School - both in Boston
| | - Lawrence R Zukerberg
- From the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Massachusetts General Hospital, and the Departments of Radiation Oncology (T.S.H., P.J.G.), Hematology (J.N.A.), Surgery (P.C.S.), Radiology (K.P.L.), and Pathology (L.R.Z.), Harvard Medical School - both in Boston
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Moshammer H, Simic S, Haluza D. UV "Indices"-What Do They Indicate? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13101041. [PMID: 27783061 PMCID: PMC5086780 DOI: 10.3390/ijerph13101041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 10/14/2016] [Accepted: 10/18/2016] [Indexed: 12/11/2022]
Abstract
Ultra-Violet (UV) radiation covers the spectrum of wavelengths from 100 to 400 nm. The potency and biological activity for a variety of endpoints differ by wavelength. For monitoring and communication purposes, different UV action spectra have been developed. These spectra use different weighting functions. The action spectrum for erythemal dose is the most widely used one. This erythemal dose per time or dose-rate has been further simplified into a “UV index”. Following this example, in our review we use the term “index” or (plural) “indices” in a more general description for all simplified single-value measures for any biologically effective UV dose, e.g., for human non-melanoma skin cancer and for previtamin D production rate. Ongoing discussion about the existence of an increased melanoma risk due to UV-A exposure underscores the uncertainties inherent in current weighting functions. Thus, we performed an online literature search to review the data basis for these indices, to understand their relevance for an individual, and to assess the applicability of the indices for a range of exposure scenarios. Even for natural (solar) UV, the spectral composition varies spatially and temporally. Artificial UV sources and personal protection introduce further variation to the spectral composition. Many biological effects are proposed for UV radiation. Only few endpoints have been studied sufficiently to estimate a reliable index. Weighting functions for chronic effects and most importantly for cancer endpoints have been developed in animal models, and often for proxy endpoints only. Epidemiological studies on biological effects of UV radiation should not only depend on single-value weighted UV dose estimates (indexes) but should strive for a more detailed description of the individual exposure. A better understanding of the adverse and beneficial effects of UV radiation by wavelength would also improve medical counseling and health communication regarding individual health-supportive behavior.
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Affiliation(s)
- Hanns Moshammer
- Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Vienna 1090, Austria.
| | - Stana Simic
- Institute for Meteorology, University of Natural Resources and Life Sciences, Vienna 1180, Austria.
| | - Daniela Haluza
- Institute for Environmental Health, Center for Public Health, Medical University of Vienna, Vienna 1090, Austria.
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Brummer GC, Bowen AR, Bowen GM. Merkel Cell Carcinoma: Current Issues Regarding Diagnosis, Management, and Emerging Treatment Strategies. Am J Clin Dermatol 2016; 17:49-62. [PMID: 26596990 DOI: 10.1007/s40257-015-0163-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Merkel cell carcinoma (MCC) is a rare but aggressive cutaneous tumor with a predilection for the head and neck of elderly Caucasian patients. Although much less common than melanoma, MCC has higher rates of sentinel lymph node involvement, local and regional recurrences, and mortality. The majority of MCC cases have been linked to the relatively newly discovered Merkel cell polyomavirus, which is a ubiquitous constituent of the skin flora. Recent discoveries regarding viral integration and carcinogenesis and the immunologic features of MCC have expanded the understanding of MCC. These discoveries have led to the development and application of emerging therapies such as somatostatin analogs, immune checkpoint inhibition, adoptive cell therapy, and other exciting possibilities for targeted therapy.
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Ludema C, Cole SR, Poole C, Smith JS, Schoenbach VJ, Wilhelmus KR. Association between unprotected ultraviolet radiation exposure and recurrence of ocular herpes simplex virus. Am J Epidemiol 2014; 179:208-15. [PMID: 24142918 DOI: 10.1093/aje/kwt241] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Studies have suggested that exposure to ultraviolet (UV) light may increase risk of herpes simplex virus (HSV) recurrence. Between 1993 and 1997, the Herpetic Eye Disease Study (HEDS) randomized 703 participants with ocular HSV to receipt of acyclovir or placebo for prevention of ocular HSV recurrence. Of these, 308 HEDS participants (48% female and 85% white; median age, 49 years) were included in a nested study of exposures thought to cause recurrence and were followed for up to 15 months. We matched weekly UV index values from the National Oceanic and Atmospheric Administration to each participant's study center and used marginal structural Cox models to account for time-varying psychological stress and contact lens use and selection bias from dropout. There were 44 recurrences of ocular HSV, yielding an incidence of 4.3 events per 1,000 person-weeks. Weighted hazard ratios comparing persons with ≥8 hours of time outdoors to those with less exposure were 0.84 (95% confidence interval (CI): 0.27, 2.63) and 3.10 (95% CI: 1.14, 8.48) for weeks with a UV index of <4 and ≥4, respectively (ratio of hazard ratios = 3.68, 95% CI: 0.43, 31.4). Though results were imprecise, when the UV index was higher (i.e., ≥4), spending 8 or more hours per week outdoors was associated with increased risk of ocular HSV recurrence.
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Grant WB. Roles of solar UV radiation and vitamin D in human health and how to obtain vitamin D. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/17469872.2.5.563] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Felton S, Navid F, Schwarz A, Schwarz T, Gläser R, Rhodes LE. Ultraviolet radiation-induced upregulation of antimicrobial proteins in health and disease. Photochem Photobiol Sci 2013; 12:29-36. [DOI: 10.1039/c2pp25158b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Abstract
Background: Vitamin D deficiency is associated with cardiovascular disease such as coronary artery disease, heart failure, and hypertension. Vitamin D deficiency activates the renin–angiotensin–aldosterone system, which affects the cardiovascular system. For this reason, it could be suggested that there is a relationship between vitamin D deficiency and atrial fibrillation (AF). In our study, we compared 25-hydroxyvitamin D (25-OHD) levels between nonvalvular AF, valvular AF, and control groups in sinus rhythm. Method: A total of 102 patients with nonvalvular chronic AF without any other cardiovascular disease (mean age 62.51 ± 5.88; group I) and 96 patients with AF, which is associated with mitral valve disease (mean age 61.51 ± 5; group II) were included in our study. Of all, 100 age-matched healthy people with sinus rhythm were accepted as control groups (mean age 61.35 ± 5.44). Routine biochemical parameters, 25-OHD and parathormone levels were performed. Results: Baseline characteristics of the study groups were comparable. Group I patients had a lower vitamin D level than group II and the control group (6.51 ± 4.89, 9.24 ± 7.39, and 11.18 ± 6.98 ng/mL, P < .001, respectively). In groups I and II, the patients’ left atrium diameter and systolic pulmonary artery pressure are higher than the control group. Conclusion: As a result, our study revealed a relationship between vitamin D deficiency and nonvalvular AF.
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The mechanisms and consequences of ultraviolet-induced immunosuppression in the skin and eye. Eye Contact Lens 2011; 37:176-84. [PMID: 21709488 DOI: 10.1097/icl.0b013e31821d7573] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Ultraviolet radiation (UVR) of the skin results in immune suppression to antigens encountered shortly after the exposure. The pathways leading to the downregulation in immunity are complex, initiated by chromophores located at the surface of the skin and ending with the generation of immunosuppressive mediators and regulatory cells. Ultraviolet-induced immunosuppression can be considered not only as beneficial, such as in preventing chronic inflammatory responses and allergic and automimmune reactions, but it can also be detrimental, such as in the lack of control of skin tumors and infectious diseases. The eye is an immune privileged site through a wide variety of mechanisms that allow selected immune responses without causing inflammation. The role of UVR in altering immune responses in the eye is not clear and is discussed in relation to photokeratitis, herpetic stromal keratitis, and pterygium.
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27
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Modulation of the immune system by UV radiation: more than just the effects of vitamin D? Nat Rev Immunol 2011; 11:584-96. [PMID: 21852793 DOI: 10.1038/nri3045] [Citation(s) in RCA: 294] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Humans obtain most of their vitamin D through the exposure of skin to sunlight. The immunoregulatory properties of vitamin D have been demonstrated in studies showing that vitamin D deficiency is associated with poor immune function and increased disease susceptibility. The benefits of moderate ultraviolet (UV) radiation exposure and the positive latitude gradients observed for some immune-mediated diseases may therefore reflect the activities of UV-induced vitamin D. Alternatively, other mediators that are induced by UV radiation may be more important for UV-mediated immunomodulation. Here, we compare and contrast the effects of UV radiation and vitamin D on immune function in immunopathological diseases, such as psoriasis, multiple sclerosis and asthma, and during infection.
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Abstract
Increased ultraviolet light exposure and hypoxia at altitude along with the body's physiological adaptation to altitude can lead to problems with the visual system. The problems that occur can be at the time of the exposure or delayed. The article provides an overview of the ways which the different components of the visual system can be affected following such exposure.
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Affiliation(s)
- A Gibson
- James Cook University Hospital, Middlesbrough.
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Verneuil L, Gouarin S, Comoz F, Agbalika F, Creveuil C, Varna M, Vabret A, Janin A, Leroy D. Epstein-Barr virus involvement in the pathogenesis of hydroa vacciniforme: an assessment of seven adult patients with long-term follow-up. Br J Dermatol 2010; 163:174-82. [DOI: 10.1111/j.1365-2133.2010.09789.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fumagalli M, Pozzoli U, Cagliani R, Comi GP, Bresolin N, Clerici M, Sironi M. Genome-wide identification of susceptibility alleles for viral infections through a population genetics approach. PLoS Genet 2010; 6:e1000849. [PMID: 20174570 PMCID: PMC2824813 DOI: 10.1371/journal.pgen.1000849] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Accepted: 01/18/2010] [Indexed: 12/29/2022] Open
Abstract
Viruses have exerted a constant and potent selective pressure on human genes throughout evolution. We utilized the marks left by selection on allele frequency to identify viral infection-associated allelic variants. Virus diversity (the number of different viruses in a geographic region) was used to measure virus-driven selective pressure. Results showed an excess of variants correlated with virus diversity in genes involved in immune response and in the biosynthesis of glycan structures functioning as viral receptors; a significantly higher than expected number of variants was also seen in genes encoding proteins that directly interact with viral components. Genome-wide analyses identified 441 variants significantly associated with virus-diversity; these are more frequently located within gene regions than expected, and they map to 139 human genes. Analysis of functional relationships among genes subjected to virus-driven selective pressure identified a complex network enriched in viral products-interacting proteins. The novel approach to the study of infectious disease epidemiology presented herein may represent an alternative to classic genome-wide association studies and provides a large set of candidate susceptibility variants for viral infections. Viruses have represented a constant threat to human communities throughout their history, therefore, human genes involved in anti-viral response can be thought of as targets of virus-driven selective pressure. Here we utilized the marks left by selection to identify viral infection-associated allelic variants. We analyzed more than 660,000 single nucleotide polymorphisms (SNPs) genotyped in 52 human populations, and we used virus diversity (the number of different viruses in a geographic region) to measure virus-driven selective pressure. Results showed that genes involved in immune response and in the biosynthesis of glycan structures functioning as viral receptors display more variants associated with virus diversity than expected by chance. The same holds true for genes encoding proteins that directly interact with viral components. Genome-wide analysis identified 441 variants, mapping to 139 human genes, significantly associated with virus-diversity. We analyzed the functional relationships among genes subjected to virus-driven selective pressure and identified a complex interaction network enriched in viral products-interacting proteins. Therefore, we describe a novel approach for the identification of gene variants that may be involved in the susceptibility to viral infections.
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Affiliation(s)
- Matteo Fumagalli
- Scientific Institute IRCCS E. Medea, Bioinformatic Lab, Bosisio Parini (LC), Italy
- Bioengineering Department, Politecnico di Milano, Milan, Italy
| | - Uberto Pozzoli
- Scientific Institute IRCCS E. Medea, Bioinformatic Lab, Bosisio Parini (LC), Italy
| | - Rachele Cagliani
- Scientific Institute IRCCS E. Medea, Bioinformatic Lab, Bosisio Parini (LC), Italy
| | - Giacomo P. Comi
- Dino Ferrari Centre, Department of Neurological Sciences, University of Milan, IRCCS Ospedale Maggiore Policlinico, Mangiagalli and Regina Elena Foundation, Milan, Italy
| | - Nereo Bresolin
- Scientific Institute IRCCS E. Medea, Bioinformatic Lab, Bosisio Parini (LC), Italy
- Dino Ferrari Centre, Department of Neurological Sciences, University of Milan, IRCCS Ospedale Maggiore Policlinico, Mangiagalli and Regina Elena Foundation, Milan, Italy
| | - Mario Clerici
- Department of Biomedical sciences and Technologies LITA Segrate, University of Milan, Milan, Italy
- Don C. Gnocchi ONLUS Foundation IRCCS, Milan, Italy
| | - Manuela Sironi
- Scientific Institute IRCCS E. Medea, Bioinformatic Lab, Bosisio Parini (LC), Italy
- * E-mail:
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Gläser R, Navid F, Schuller W, Jantschitsch C, Harder J, Schröder JM, Schwarz A, Schwarz T. UV-B radiation induces the expression of antimicrobial peptides in human keratinocytes in vitro and in vivo. J Allergy Clin Immunol 2009; 123:1117-23. [PMID: 19342087 DOI: 10.1016/j.jaci.2009.01.043] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2008] [Revised: 12/17/2008] [Accepted: 01/14/2009] [Indexed: 11/17/2022]
Affiliation(s)
- Regine Gläser
- Department of Dermatology and Allergology, University Kiel, Kiel, Germany
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