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Journal articles on the topic 'UVA exposure'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Turnbull, D. J., and P. W. Schouten. "Utilising polyphenylene oxide for high exposure solar UVA dosimetry." Atmospheric Chemistry and Physics 8, no. 10 (2008): 2759–62. http://dx.doi.org/10.5194/acp-8-2759-2008.

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Abstract. A personal UV dosimeter that can quantitatively assess high exposure solar UVA exposures has been developed. The chemical polyphenylene oxide has been previously reported on its ability to measure high UVB exposures. This current research has found that polyphenylene oxide, cast in thin film form, is responsive to both the UVA and UVB parts of the solar spectrum. Further to this, the UVB wavelengths were filtered out with the use of mylar. This combined system responded to the UVA wavelengths only and underwent a change in optical absorbance as a result of UVA exposure. Preliminary r

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2

Turnbull, D. J., and P. W. Schouten. "Utilising polyphenylene oxide for high exposure solar UVA dosimetry." Atmospheric Chemistry and Physics Discussions 8, no. 1 (2008): 2129–41. http://dx.doi.org/10.5194/acpd-8-2129-2008.

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Abstract. Researchers at the University of Southern Queensland have developed a personal UV dosimeter that can quantitatively assess high exposure solar UVA exposures. The chemical polyphenylene oxide has been previously reported on its ability to measure high UVB exposures. This current research has found that polyphenylene oxide, cast in thin film form, is responsive to both the UVA and UVB parts of the solar spectrum. Further to this, the UVB wavelengths were filtered out with the use of mylar. This combined system responded to the UVA wavelengths only and underwent a change in optical abso

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3

Belon, Ph E. "UVA EXPOSURE AND PITUITARY SECRETION. VARIATIONS OF HUMAN LIPOTROPIN CONCENTRATIONS (βLPH) AFTER UVA EXPOSURE". Photochemistry and Photobiology 42, № 3 (1985): 327–29. http://dx.doi.org/10.1111/j.1751-1097.1985.tb08948.x.

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4

Lucas, Robyn M., Rachel E. Neale, Sasha Madronich, and Richard L. McKenzie. "Are current guidelines for sun protection optimal for health? Exploring the evidence." Photochemical & Photobiological Sciences 17, no. 12 (2018): 1956–63. http://dx.doi.org/10.1039/c7pp00374a.

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At UVI < 3, sun protection is not recommended, but UVA irradiance may be high; even short exposures may incur health risks. Duration of exposure must be considered with UVI for risks and benefits of sun exposure.

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5

Wong, J. C. F., and A. V. Parisi. "Measurement of UVA Exposure to Solar Radiation." Photochemistry and Photobiology 63, no. 6 (1996): 807–10. http://dx.doi.org/10.1111/j.1751-1097.1996.tb09634.x.

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6

Gao, Meifang, Yamin Li, Haozhao Jiang, et al. "UVA-Radiation Exposure of Different Durations Promoted the Growth, Phytochemicals and Glucosinolate Biosynthesis of Chinese Kale." International Journal of Molecular Sciences 23, no. 14 (2022): 7619. http://dx.doi.org/10.3390/ijms23147619.

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Ultraviolet-A (UVA) (315–400 nm) is an essential environmental signal that regulates plant development and affects phytochemicals biosynthesis, including glucosinolate biosynthesis. The effects of different UVA (380 ± 10 nm, 40 μmol/m2/s) exposure durations, including 0 h/d (UV0), 6 h/d (UV6) and 12 h/d (UV12), on the growth and phytochemicals of Chinese kale (Brassica alboglabra) under white 250 μmol/m2/s LEDs were investigated. UVA exposure of different durations influenced the growth and phytochemicals biosynthesis of Chinese kale. Prolonging UVA irradiation throughout the growth cycle posi

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7

kandan, P. Veeramani, Agilan Balupillai, G. Kanimozhi, Haseeb A. Khan, Abdullah S. Alhomida, and Nagarajan Rajendra Prasad. "Opuntiol Prevents Photoaging of Mouse Skin via Blocking Inflammatory Responses and Collagen Degradation." Oxidative Medicine and Cellular Longevity 2020 (November 30, 2020): 1–12. http://dx.doi.org/10.1155/2020/5275178.

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In the present study, we investigated the potential of opuntiol, isolated from Opuntia ficus-indica, against UVA radiation-mediated inflammation and skin photoaging in experimental animals. The skin-shaved experimental mouse was subjected to UVA exposure at the dosage of 10 J/cm2 per day for ten consecutive days (cumulative UVA dose: 100 J/cm2). Opuntiol (50 mg/kg b.wt.) was topically applied one hour before each UVA exposure. UVA (100 J/cm2) exposure induces epidermal hyperplasia and collagen disarrangement which leads to the photoaging-associated molecular changes in the mouse skin. Opuntiol

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8

Baadsgaard, O., S. Lisby, G. L. Wantzin, H. C. Wulf, and K. D. Cooper. "Rapid recovery of Langerhans cell alloreactivity, without induction of autoreactivity, after in vivo ultraviolet A, but not ultraviolet B exposure of human skin." Journal of Immunology 142, no. 12 (1989): 4213–18. http://dx.doi.org/10.4049/jimmunol.142.12.4213.

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Abstract For therapeutic medical, cosmetic, and recreational reasons, humans expose themselves to increasing amounts of UVA. However, little is known of the photobiologic events associated with cutaneous carcinogenesis and photoaging that occur as a result of UVA exposure. UVB exposure of human skin abrogates the function of epidermal CD1+DR+ Langerhans cells and induces the appearance of CD1-DR+ non-Langerhans cell APC. This non-Langerhans cell APC population activates autoreactive immunoregulatory T cells that lead to suppressor-effector T cell function. In this report we show that, similarl

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Soule, Tanya, Ferran Garcia-Pichel, and Valerie Stout. "Gene Expression Patterns Associated with the Biosynthesis of the Sunscreen Scytonemin in Nostoc punctiforme ATCC 29133 in Response to UVA Radiation." Journal of Bacteriology 191, no. 14 (2009): 4639–46. http://dx.doi.org/10.1128/jb.00134-09.

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ABSTRACT Under exposure to UV radiation, some cyanobacteria synthesize sunscreen compounds. Scytonemin is a heterocyclic indole-alkaloid sunscreen, the synthesis of which is induced upon exposure to UVA (long-wavelength UV) radiation. We previously identified and characterized an 18-gene cluster associated with scytonemin biosynthesis in the cyanobacterium Nostoc punctiforme ATCC 29133; we now report on the expression response of these genes to a step-up shift in UVA exposure. Using quantitative PCR on cDNAs from the N. punctiforme transcriptome and primers targeting each of the 18 genes in th

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10

Tegner, E., and A. Björnberg. "Hydrogen peroxide cream for the prevention of white pressure areas in UVA sunbeds." Acta Dermato-Venereologica 70, no. 1 (1990): 75–76. http://dx.doi.org/10.2340/00015555707576.

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A single application of 1% hydrogen peroxide in a stabilized lipid cream during 2 min before UVA exposure prevents white spots in anoxic pressure areas in sunbed use, causing an almost normal pigmentation. During maintenance exposure with UVA once a week this pigmentation will remain unchanged if the pressure areas are pretreated with hydrogen peroxide before each irradiation. White spots will appear 3-4 weeks after finishing hydrogen peroxide pretreatment in the pressure areas thus exposed to UVA alone.

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11

Parisi, Alfio, Damien Igoe, Nathan Downs, Joanna Turner, Abdurazaq Amar, and Mustapha A Jebar. "Satellite Monitoring of Environmental Solar Ultraviolet A (UVA) Exposure and Irradiance: A Review of OMI and GOME-2." Remote Sensing 13, no. 4 (2021): 752. http://dx.doi.org/10.3390/rs13040752.

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Excessive exposure to solar ultraviolet (UV) radiation has damaging effects on life on Earth. High-energy short-wavelength ultraviolet B (UVB) is biologically effective, influencing a range of dermal processes, including the potentially beneficial production of vitamin D. In addition to the damaging effects of UVB, the longer wavelength and more abundant ultraviolet A (UVA) has been shown to be linked to an increased risk of skin cancer. To evaluate this risk requires the monitoring of the solar UVA globally on a time repetitive basis in order to provide an understanding of the environmental s

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12

Ann, Ling Chuo, Shahrom Mahmud, Siti Khadijah Mohd Bakhori, and Amna Sirelkhatim. "Photoconductivity of Pharma-Grade ZnO under UVA and White Light Exposure." Advanced Materials Research 1108 (June 2015): 73–78. http://dx.doi.org/10.4028/www.scientific.net/amr.1108.73.

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In this study, we investigated the photoconductivity of pharma-grade zinc oxide (ZnO) which was excited under ultraviolet - long wavelength (UVA) and white light illumination. The morphological structures of ZnO were studied using field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The ZnO sample was composed of micro/nanorods, slabs, tripods, tetrapods and irregular-shaped particles. The energy-dispersive X-ray spectroscopy (EDS) result revealed the high purity of ZnO, with the relative O/Zn atomic ratio lower than 1. The absorption spectrum of ZnO

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13

Sun, Congliang, Patrick A. Limbach, and Balasubrahmanyam Addepalli. "Characterization of UVA-Induced Alterations to Transfer RNA Sequences." Biomolecules 10, no. 11 (2020): 1527. http://dx.doi.org/10.3390/biom10111527.

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Ultraviolet radiation (UVR) adversely affects the integrity of DNA, RNA, and their nucleoside modifications. By employing liquid chromatography–tandem mass spectrometry (LC–MS/MS)-based RNA modification mapping approaches, we identified the transfer RNA (tRNA) regions most vulnerable to photooxidation. Photooxidative damage to the anticodon and variable loop regions was consistently observed in both modified and unmodified sequences of tRNA upon UVA (λ 370 nm) exposure. The extent of oxidative damage measured in terms of oxidized guanosine, however, was higher in unmodified RNA compared to its

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14

Larnac, Eloïse, Sébastien Méthot, Frédéric Pelchat, et al. "Synergistic Toxicity of Pollutant and Ultraviolet Exposure from a Mitochondrial Perspective." International Journal of Molecular Sciences 25, no. 17 (2024): 9146. http://dx.doi.org/10.3390/ijms25179146.

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Ultraviolet (UV) exposure and atmospheric pollution are both independently implicated in skin diseases such as cancer and premature aging. UVA wavelengths, which penetrate in the deep layers of the skin dermis, exert their toxicity mainly through chromophore photosensitization reactions. Benzo[a]pyrene (BaP), the most abundant polycyclic aromatic hydrocarbon originating from the incomplete combustion of organic matter, could act as a chromophore and absorb UVA. We and other groups have previously shown that BaP and UVA synergize their toxicity in skin cells, which leads to important oxidation.

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Yu, Szu-Chieh, Wan-Chun Chiu, Pei Yu Loe, and Yi-Wen Chien. "Effects of Hydroxysafflor Yellow A (HSYA) on UVA-Induced Damage in HaCaT Keratinocytes." International Journal of Molecular Sciences 25, no. 14 (2024): 7573. http://dx.doi.org/10.3390/ijms25147573.

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To assess the effects of hydroxysafflor yellow A (HSYA) on ultraviolet A (UVA)-induced damage in HaCaT keratinocytes. HaCaT keratinocytes were UVA-irradiated, and the effects of HSYA on cell viability, reactive oxygen species (ROS) generation, lipid peroxidation, and messenger (m)RNA expression were measured. mRNA expressions of matrix metalloproteinase (MMP)-1, MMP-2, MMP-9, and cyclooxygenase (COX)-2 were determined by a real-time polymerase chain reaction (RT-PCR). UVA exposure led to a decrease in cell viability and an increase in ROS generation in HaCaT keratinocytes. HSYA effectively inc

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16

Oh, Jung Hwan, Fatih Karadeniz, Jung Im Lee, Hye Ran Kim, Youngwan Seo, and Chang-Suk Kong. "Antiphotoaging Effect of (2′S)-Columbianetin from Corydalis heterocarpa in UVA-Irradiated Human Dermal Fibroblasts." Applied Sciences 10, no. 7 (2020): 2568. http://dx.doi.org/10.3390/app10072568.

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Ultraviolet A (UVA)-induced detrimental effects in the skin, also known as photoaging, are mediated with several pathways including oxidative stress generation and extracellular matrix (ECM) degradation. UVA irradiation results in excessive production of matrix metalloproteinases (MMPs), enzymes responsible for the degradation of ECM components such as collagen. In this study, the protective effects of (2′S)-columbianetin against UVA-induced changes in matrix metalloproteinase-1 (MMP-1) and collagen production were investigated in human dermal fibroblasts (HDFs). The (2′S)-columbianetin was is

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17

Turnbull, D. J., and A. V. Parisi. "Utilising shade to optimize UV exposure for vitamin D." Atmospheric Chemistry and Physics Discussions 8, no. 1 (2008): 781–96. http://dx.doi.org/10.5194/acpd-8-781-2008.

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Abstract. Numerous studies have stated that humans need to utilise full sun radiation, at certain times of the day, to assist the body in synthesising the required levels of vitamin D3. The time needed to be spent in the full sun depends on a number of factors, for example, age, skin type, latitude, solar zenith angle. Current Australian guidelines suggest exposure to approximately 1/6 to 1/3 of a minimum erythemal dose (MED), depending on age, would be appropriate to provide adequate vitamin D3 levels. The aim of the study was to determine the exposure times to diffuse solar UV to receive exp

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Turnbull, D. J., and A. V. Parisi. "Utilising shade to optimize UV exposure for vitamin D." Atmospheric Chemistry and Physics 8, no. 11 (2008): 2841–46. http://dx.doi.org/10.5194/acp-8-2841-2008.

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Abstract. Numerous studies have stated that humans need to utilise full sun radiation, at certain times of the day, to assist the body in synthesising the required levels of vitamin D3. The time needed to be spent in the full sun depends on a number of factors, for example, age, skin type, latitude, solar zenith angle. Current Australian guidelines suggest exposure to approximately 1/6 to 1/3 of a minimum erythemal dose (MED), depending on age, would be appropriate to provide adequate vitamin D3 levels. The aim of the study was to determine the exposure times to diffuse solar UV to receive exp

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19

Sjövall, P., and OB Christensen. "Local and systemic effect of ultraviolet irradiation (UVB and UVA) on human allergic contact dermatitis." Acta Dermato-Venereologica 66, no. 4 (1986): 290–94. http://dx.doi.org/10.2340/0001555566290294.

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In subjects hypersensitive to nickel we have investigated local and systemic effect of whole body exposure of cumulative suberythema UVB doses as well as solarium-UVA exposure. UVB possesses both locally and systemically a suppressive effect on human allergic contact dermatitis, but UVA has no such effect. The systemic suppressive effect of UVB might be of therapeutic importance in patients with severe chronic dermatitis of the hands when adding this effect to a local suppressive effect. Also, patch testing should not be performed during UVB and/or overt sun exposure.

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Sabburg, J., A. V. Parisi, and J. Wong. "Effect of Cloud on UVA and Exposure to Humans¶." Photochemistry and Photobiology 74, no. 3 (2007): 412–16. http://dx.doi.org/10.1562/0031-8655(2001)0740412eocoua2.0.co2.

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Sabburg, J., A. V. Parisi, and J. Wong. "Effect of Cloud on UVA and Exposure to Humans¶." Photochemistry and Photobiology 74, no. 3 (2001): 412. http://dx.doi.org/10.1562/0031-8655(2001)074<0412:eocoua>2.0.co;2.

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22

Ibuki, Y., T. Toyooka, and R. Goto. "Inhibition of apoptosis by menadione on exposure to UVA." Cell Biology and Toxicology 22, no. 5 (2006): 351–60. http://dx.doi.org/10.1007/s10565-006-0089-x.

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23

Brennan, Patrick J. "UVA-340 exposure of automotive materials: A status report." Journal of Vinyl and Additive Technology 12, no. 2 (1990): 73–77. http://dx.doi.org/10.1002/vnl.730120206.

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24

Pena, Ana-Maria, Shosuke Ito, Thomas Bornschlögl, Sébastien Brizion, Kazumasa Wakamatsu, and Sandra Del Bino. "Multiphoton FLIM Analyses of Native and UVA-Modified Synthetic Melanins." International Journal of Molecular Sciences 24, no. 5 (2023): 4517. http://dx.doi.org/10.3390/ijms24054517.

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To better understand the impact of solar light exposure on human skin, the chemical characterization of native melanins and their structural photo-modifications is of central interest. As the methods used today are invasive, we investigated the possibility of using multiphoton fluorescence lifetime (FLIM) imaging, along with phasor and bi-exponential fitting analyses, as a non-invasive alternative method for the chemical analysis of native and UVA-exposed melanins. We demonstrated that multiphoton FLIM allows the discrimination between native DHI, DHICA, Dopa eumelanins, pheomelanin, and mixed

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Maciel, Elisabete, Juliana Felgueiras, Eduarda M. P. Silva, et al. "Lipid remodelling in human melanoma cells in response to UVA exposure." Photochemical & Photobiological Sciences 16, no. 5 (2017): 744–52. http://dx.doi.org/10.1039/c7pp00025a.

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26

Cova, A., L. Breschi, F. Nato, et al. "Effect of UVA-activated Riboflavin on Dentin Bonding." Journal of Dental Research 90, no. 12 (2011): 1439–45. http://dx.doi.org/10.1177/0022034511423397.

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Recent studies have reported collagen cross-linking after exposure to riboflavin followed by ultraviolet-A (UVA) exposure. This study is the first to investigate the effect of a riboflavin-containing primer on adhesive interface stability and dentinal matrix metalloproteinase activity. Human dentin was etched with 35% phosphoric acid, treated with 0.1% riboflavin, exposed to UVA for 2 min, and bonded with a two-step etch-and-rinse adhesive. Adhesive was applied to control specimens without riboflavin/UVA. Specimens were subjected to microtensile bond strength tests and pulled to failure after

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27

Reeve, Vivienne E., and Diane Domanski. "Refractoriness of UVA-induced Protection from Photoimmunosuppression Correlates with Heme Oxygenase Response to Repeated UVA Exposure¶." Photochemistry and Photobiology 76, no. 4 (2007): 401–5. http://dx.doi.org/10.1562/0031-8655(2002)0760401rouipf2.0.co2.

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Reeve, Vivienne E., and Diane Domanski. "Refractoriness of UVA-induced Protection from Photoimmunosuppression Correlates with Heme Oxygenase Response to Repeated UVA Exposure¶." Photochemistry and Photobiology 76, no. 4 (2002): 401. http://dx.doi.org/10.1562/0031-8655(2002)076<0401:rouipf>2.0.co;2.

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29

Kelfkens, Gert, Frank R. de Gruijl, and Jan C. van der Leun. "The influence of ventral UVA exposure on subsequent tumorigenesis in mice by UVA or UVB irradiation." Carcinogenesis 13, no. 11 (1992): 2169–74. http://dx.doi.org/10.1093/carcin/13.11.2169.

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Mayangsari, Elly, Arifa Mustika, Nurdiana Nurdiana, and Nozlena Samad. "Comparison of UVA vs UVB Photoaging Rat Models in Short-term Exposure." Medical Archives 78, no. 2 (2024): 88. http://dx.doi.org/10.5455/medarh.2024.78.88-91.

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Background: Prolonged exposure to sunlight is known to induce photoaging of the skin, leading to various skin changes and disorders, such as dryness, wrinkles, irregular pigmentation, and even cancer. Ultraviolet A (UVA) and ultraviolet B (UVB) radiation are particularly responsible for causing photoaging. Objective: This study aims to identify and compare photoaging rat models exposed to UVA and UVB. Methods: This research method compared macroscopic (scoring degree of wrinkling) and microscopic (histology) signs and symptoms on skin samples of rat exposed to UVA and UVB for 4 weeks at a radi

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Vaughan, C., J. Schimmel, and M. Tapman. "Photoinstability of UVA Sun Protection Products." American Journal of Cosmetic Surgery 14, no. 1 (1997): 23–25. http://dx.doi.org/10.1177/074880689701400106.

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Thin films of leading commercial high-sun-protection-factor sun products with UVA (ultraviolet 340- to 380-nm radiation) claims were compared to a new, high-efficiency sunscreen product that was designed to resist breakdown from exposure to UV radiation. The relationship between the thickness of the topical application of sunscreen films and the durability and efficacy of the product has significant clinical implications for physicians.

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Bingham, B. L., and A. M. Reitzel. "Solar damage to the solitary ascidian, Corella inflata." Journal of the Marine Biological Association of the United Kingdom 80, no. 3 (2000): 515–21. http://dx.doi.org/10.1017/s0025315400002216.

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The ascidian Corella inflata (Chordata, Ascidiacea) is common in many areas of Puget Sound, Washington, USA. However, it occurs only in habitats where it is protected from direct sunlight. Previous experiments with artificial lights showed that UV irradiation kills all life stages of this animal. The effects of natural sunlight exposure (measuring survival of adults, juveniles, larvae, and embryos) were compared. We partitioned the light spectrum to separate the effects of UVB, UVA, and visible light (PAR). Natural sunlight severely damaged C. inflata. Adults and juveniles died after 2-5 d. Ex

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Qiu, Xiaoyun, George W. Sundin, Benli Chai, and James M. Tiedje. "Survival of Shewanella oneidensis MR-1 after UV Radiation Exposure." Applied and Environmental Microbiology 70, no. 11 (2004): 6435–43. http://dx.doi.org/10.1128/aem.70.11.6435-6443.2004.

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ABSTRACT We systematically investigated the physiological response as well as DNA damage repair and damage tolerance in Shewanella oneidensis MR-1 following UVC, UVB, UVA, and solar light exposure. MR-1 showed the highest UVC sensitivity among Shewanella strains examined, with D37 and D10 values of 5.6 and 16.5% of Escherichia coli K-12 values. Stationary cells did not show an increased UVA resistance compared to exponential-phase cells; instead, they were more sensitive at high UVA dose. UVA-irradiated MR-1 survived better on tryptic soy agar than Luria-Bertani plates regardless of the growth

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Fidrus, Ujhelyi, Fehér, et al. "Silymarin: Friend or Foe of UV Exposed Keratinocytes?" Molecules 24, no. 9 (2019): 1652. http://dx.doi.org/10.3390/molecules24091652.

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The application of natural plant extracts in UV-protection is popular and intensively studied. Silymarin (from Silibum marianum), a naturally occurring polyphenol, has recently received attention due to its antioxidant, anti-inflammatory and anti-apoptotic effects. However, its role in the UV-mediated keratinocyte cell response is still controversial. In this study, we investigated the effects of Silibum marianum extracts with different origins and formulations on UVA-exposed HaCaT keratinocytes in vitro. Our results show, that silymarin treatment caused an inverse dose-dependent photosensitiv

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Pezzoni, Magdalena, Ramón A. Pizarro, and Cristina S. Costa. "Role of quorum sensing in UVA-induced biofilm formation in Pseudomonas aeruginosa." Microbiology 166, no. 8 (2020): 735–50. http://dx.doi.org/10.1099/mic.0.000932.

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Pseudomonas aeruginosa , a versatile bacterium present in terrestrial and aquatic environments and a relevant opportunistic human pathogen, is largely known for the production of robust biofilms. The unique properties of these structures complicate biofilm eradication, because they make the biofilms very resistant to diverse antibacterial agents. Biofilm development and establishment is a complex process regulated by multiple regulatory genetic systems, among them is quorum sensing (QS), a mechanism employed by bacteria to regulate gene transcription in response to population density. In addit

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Ann, Ling Chuo, Shahrom Mahmud, Siti Khadijah Mohd Bakhori, et al. "Enhanced Photoconductivity and Antibacterial Response of Rubber-Grade ZnO upon UVA Illumination." Advanced Materials Research 925 (April 2014): 33–37. http://dx.doi.org/10.4028/www.scientific.net/amr.925.33.

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Ultraviolet-A (UVA) radiation is present in sunlight and have been associated with various types of human skin cancers. In this study, rubber-grade zinc oxide (ZnO) powder was used as the targeted materials to study its UVA photoresponse as well as its antibacterial function. ZnO powder was synthesized using French process. The morphological structures of the samples were investigated using field emission scanning electron microscopy and transmission electron microscopy. The dominant morphology of the sample was micro/nanoplate. The optical bandgap of the ZnO sample is 3.19 eV based on the UV-

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Kimlin, M. G., A. V. Parisi, J. Sabburg, and N. J. Downs. "Understanding the UVA environment at a sub-tropical site and its consequent impact on human UVA exposure." Photochemical & Photobiological Sciences 1, no. 7 (2002): 478–82. http://dx.doi.org/10.1039/b200844k.

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Ross, Hannah, Donna Parkin, and Jean Ayer. "PD11 Simultaneous development of photosensitivity in a father and daughter: de novo or exposure induced?" British Journal of Dermatology 191, Supplement_1 (2024): i86. http://dx.doi.org/10.1093/bjd/ljae090.175.

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Abstract Chronic actinic dermatitis and photoaggravated eczema are rare photosensitivity disorders that, while considered to be immunologically mediated, usually develop de novo. A 4-year-old White British girl and her 33-year-old White British father presented to a tertiary photobiology clinic with similar photodistributed eruptions that occurred acutely following exposure to an airborne glyphosate organophosphate-containing weedkiller. The eruptions persisted thereafter on exposure to sunlight. Approximately 15 min of sun exposure is sufficient to provoke a red, scaly and blistering eruption

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Baier, Jürgen, Tim Maisch, Max Maier, Eva Engel, Michael Landthaler, and Wolfgang Bäumler. "Singlet Oxygen Generation by UVA Light Exposure of Endogenous Photosensitizers." Biophysical Journal 91, no. 4 (2006): 1452–59. http://dx.doi.org/10.1529/biophysj.106.082388.

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Zigman, Seymour, Thurma McDaniel, Joanne Schultz, and John Reddan. "Effects of intermittent UVA exposure on cultured lens epithelial cells." Current Eye Research 20, no. 2 (2000): 95–100. http://dx.doi.org/10.1076/0271-3683(200002)2021-dft095.

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Antoniou, C., H. Schulpis, T. Michas, et al. "Vitiligo Therapy with Oral and Topical Phenylalanine with UVA Exposure." International Journal of Dermatology 28, no. 8 (1989): 545–47. http://dx.doi.org/10.1111/j.1365-4362.1989.tb04613.x.

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Linhart, C., M. Wolter, and R. Kaufmann. "Mid-dermal Elastolysis after UVA-Exposure in a Tanning Salon." American Journal of Dermatopathology 19, no. 4 (1997): 438. http://dx.doi.org/10.1097/00000372-199708000-00087.

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Wasan, Ellen K., Jinying Zhao, Joshua Poteet, et al. "Development of a UV-Stabilized Topical Formulation of Nifedipine for the Treatment of Raynaud Phenomenon and Chilblains." Pharmaceutics 11, no. 11 (2019): 594. http://dx.doi.org/10.3390/pharmaceutics11110594.

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Raynaud’s Phenomenon is a vascular affliction resulting in pain and blanching of the skin caused by excessive and prolonged constriction of arterioles, usually due to cold exposure. Nifedipine is a vasodilatory calcium channel antagonist, which is used orally as the first-line pharmacological treatment to reduce the incidence and severity of attacks when other interventions fail to alleviate the condition and there is danger of tissue injury. Oral administration of nifedipine, however, is associated with systemic adverse effects, and thus topical administration with nifedipine locally to the e

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Araujo, Paula Z., Oscar J. Oppezzo, Jorge A. Ibáñez, Miguel Blesa, and Ramón A. Pizarro. "Factors Capable of Modifying the Response of Pseudomonas aeruginosa to the Inactivation Induced by Heterogeneous Photocatalysis." International Journal of Chemical Reactor Engineering 11, no. 2 (2013): 773–79. http://dx.doi.org/10.1515/ijcre-2012-0037.

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Abstract The heterogeneous photocatalysis (HP) procedure has been demonstrated to be an interesting method for disinfecting water. It is effective for inactivating Pseudomonas aeruginosa, but its effectiveness may be reduced due to the action of several factors which are able to affect bacterial radio-sensitivity. The results reported here show the influence of nutritional stress and pre-exposure to sub-lethal UVA doses on the efficiency of the inactivation of P. aeruginosa by HP. Both previous exposures to low UVA fluencies and nutrient deprivation induce bacterial resistance to this process,

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Zhang, Yubin, Zhaoxin Li, Ning Zhang, and Xiujuan Chai. "The Effects of FR and UVA Irradiation Timing on Multi-Omics of Purple Lettuce in Plant Factories." Agriculture 14, no. 11 (2024): 2019. http://dx.doi.org/10.3390/agriculture14112019.

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The synergistic application of far-red (FR) and ultraviolet A (UVA) irradiation presents a promising approach for enhancing growth and the enrichment of secondary metabolites in plants. However, prolonged exposure to these combined light qualities imposes significant stress on plants, hindering their development. Therefore, an initial period of FR irradiation to promote plant growth, followed by a subsequent period of UVA irradiation to enhance the accumulation of plant quality, constitutes a viable strategy. Our study, focusing on purple lettuce, aims to elucidate the response mechanisms of t

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Wang, Wenlong, Chenglong Gao, Lili Ren, and Youqing Luo. "The Effect of Longwave Ultraviolet Light Radiation on Dendrolimus tabulaeformis Antioxidant and Detoxifying Enzymes." Insects 11, no. 1 (2019): 1. http://dx.doi.org/10.3390/insects11010001.

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Longwave ultraviolet (UVA) light, in the range of 315–400 nm, has been widely used as a light source in the light trapping of insect pests. Previous studies have demonstrated the oxidative stress and lethal effect of UV radiation on insects. In this study, we evaluated the influence of UVA radiation on the antioxidant and detoxifying enzymes of Dendrolimus tabulaeformis. We tested the contents of malondialdehyde (MDA), hydroxyl radical (·OH), hydrogen peroxide (H2O2), reduced glutathione (GSH), and oxidized glutathione (GSSH) following different exposure time periods of UVA light irradiation o

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Wang, Jinyun, Satoshi Yano, Kun Xie, Yoshihisa Ohata, and Taichi Hara. "Genome-Wide RNA Sequencing Analysis in Human Dermal Fibroblasts Exposed to Low-Dose Ultraviolet A Radiation." Genes 13, no. 6 (2022): 974. http://dx.doi.org/10.3390/genes13060974.

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Ultraviolet A (UVA) radiation can pass through the epidermis and reach the dermal skin layer, contributing to photoaging, DNA damage, and photocarcinogenesis in dermal fibroblasts. High-dose UVA exposure induces erythema, whereas low-dose, long-term UVA exposure causes skin damage and cell senescence. Biomarkers for evaluating damage caused by low-dose UVA in fibroblasts are lacking, making it difficult to develop therapeutic agents for skin aging and aging-associated diseases. We performed RNA-sequencing to investigate gene and pathway alterations in low-dose UVA-irradiated human skin-derived

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Serafini, Mairim Russo, Cassia Britto Detoni, Paula dos Passos Menezes, et al. "UVA-UVB Photoprotective Activity of Topical Formulations ContainingMorinda citrifoliaExtract." BioMed Research International 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/587819.

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Exposure to solar radiation, particularly its ultraviolet (UV) component, has a variety of harmful effects on human health. Some of these effects include sunburn cell formations, basal and squamous cell cancers, melanoma, cataracts, photoaging of the skin, and immune suppression. The beneficial photoprotective effects of topical formulations with the extract,Morinda citrifolia, have not been investigated. This present study aims to investigate the potential benefits ofM. citrifoliatopical application on the dorsal skin of mice, exposed to UVA-UVB light. Using 7 days of treatment, [before (base

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de Arriba, Susana Garcia, Belal Naser, and Klaus-Ulrich Nolte. "Risk Assessment of Free Hydroquinone Derived from Arctostaphylos Uva-ursi folium Herbal Preparations." International Journal of Toxicology 32, no. 6 (2013): 442–53. http://dx.doi.org/10.1177/1091581813507721.

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Uva-ursi folium (bearberry leaf) has been traditionally used to treat symptoms of lower urinary tract infections. The most representative constituent of this herbal drug is arbutin that is rapidly absorbed in the small intestine and undergoes hepatic conjugation to form hydroquinone (HQ) conjugates. As free HQ is crucial for the safety of the herbal preparation, we reviewed published and unpublished experimental and human studies to clarify some outdated assumptions and to support the safety of therapeutic daily doses of Uva-ursi folium extract. Specifically, data on pharmacokinetics and the h

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Budiawan, Gozi Ariq Ismail, Intan Cahaya Dani,, Sri Handayani, and Sunardi. "In-vitro STUDY OF ACRYLAMIDE AND TBHQ COMPOUNDS ON THE GENERATION OF DNA ADDUCT 8-HYDROXY-2’- DEOXYGUANOSINE AS BIOMARKER OF OXIDATIVE DNA DAMAGE." RASAYAN Journal of Chemistry 15, no. 04 (2022): 2334–41. http://dx.doi.org/10.31788/rjc.2022.1546770.

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The research on DNA adduct 8-OHdG formation is performed by reacting 2'-deoxyguanosine and H2O2 with acrylamide (AA) and TBHQ compounds that were exposed to UVA light. The 8-OHdG forming test was conducted at various incubation times (5 h and 7 h) and pH variations (7.4 and 8.4). The 8-OHdG formation was analyzed using a reversed-phase HPLC instrument using a buffer solution of sodium phosphate pH 6.7: methanol (85:15) as eluent. The results showed that samples containing TBHQ and acrylamide (AA) produced 8-OHdG and shows synergistic and antagonistic effects. The 8-OHdG level of mixing acrylam

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