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Pethybridge SJ, Rea M, Gadoury DM, Murphy S, Hay F, Skinner NP, Kikkert JR. Nighttime Applications of Germicidal UV Light to Suppress Cercospora Leaf Spot in Table Beet. PLANT DISEASE 2024; 108:2518-2529. [PMID: 38549272 DOI: 10.1094/pdis-12-23-2715-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
Cercospora leaf spot (CLS), caused by the hemibiotrophic fungus Cercospora beticola, is a destructive disease affecting table beet. Multiple applications of fungicides are needed to reduce epidemic progress to maintain foliar health and enable mechanized harvest. The sustainability of CLS control is threatened by the rapid development of fungicide resistance, the need to grow commercially acceptable yet CLS-susceptible cultivars, and the inability to manipulate agronomic conditions to mitigate disease risk. Nighttime applications of germicidal UV light (UV-C) have recently been used to suppress several plant diseases, notably those caused by ectoparasitic biotrophs such as powdery mildews. We evaluated the efficacy of nighttime applications of UV-C for suppression of CLS in table beet. In vitro lethality of UV-C to germinating conidia increased with increasing dose, with complete suppression at 1,000 J/m2. Greenhouse-grown table beet tolerated relatively high doses of UV-C without lethal effects despite some bronzing on the leaf blade. A UV-C dose >1,500 J/m2 resulted in phytotoxicity severities greater than 50%. UV-C exposure to ≤750 J/m2 resulted in negligible phytotoxicity. Older (6-week-old) greenhouse-grown plants were more susceptible to UV-C damage than younger (2- and 4-week-old) plants. Suppression of CLS by UV-C was greater when applied within 6 days of C. beticola inoculation than if delayed until 13 days after infection in greenhouse-grown plants. In field trials, there were significant linear relationships between UV-C dose and CLS control and phytotoxicity severity, and a significant negative linear relationship between phytotoxicity and CLS severity at the final assessment. Significant differences between UV-C doses on the severity of CLS and phytotoxicity indicated an efficacious dose near 800 J/m2. Collectively, these findings illustrate significant and substantial suppression by nighttime applications of UV-C for CLS control on table beet, with potential for incorporation in both conventional and organic table beet broadacre production systems.
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Affiliation(s)
- Sarah J Pethybridge
- Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell AgriTech, Cornell University, Geneva, NY 14456
| | - Mark Rea
- Light and Health Research Center, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - David M Gadoury
- Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell AgriTech, Cornell University, Geneva, NY 14456
| | - Sean Murphy
- Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell AgriTech, Cornell University, Geneva, NY 14456
| | - Frank Hay
- Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell AgriTech, Cornell University, Geneva, NY 14456
| | - Nicholas P Skinner
- Light and Health Research Center, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Julie R Kikkert
- Cornell Vegetable Program, Cornell Cooperative Extension, Canandaigua, NY 14424
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Girardi C, Benato F, Massironi M, Vindigni V, Stuhlmann D, Massironi M. Evaluation of human skin response to solar-simulated radiation in an ex vivo model: Effects and photoprotection of L-Carnosine. Photochem Photobiol 2024; 100:733-745. [PMID: 37675862 DOI: 10.1111/php.13850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/28/2023] [Accepted: 08/16/2023] [Indexed: 09/08/2023]
Abstract
Sunlight, and more specifically the UV component, induces several skin damages, including sunburns, erythema and photoaging. The purpose of this work is to set up an ex vivo human skin model to assess the capacity of active principles in protecting skin from the deleterious effects of solar radiation. Ex vivo human skin biopsies were cultured in an air-liquid interface and exposed to solar-simulated radiation (SSR, 300-750 nm). L-Carnosine (0.2% and 2%) was applied topically to be tested as photoprotective compound. The effect on oxidative stress induction, photoaging and skin transcriptional profile was assessed by evaluating reactive oxygen species, advanced glycosylation end products formation and gene expression changes. In our model, SSR increases ROS production and AGE accumulation and affects the expression of genes related to oxidative stress, pigmentation, immunity, inflammation and photoaging. Among these pathways, 11 genes were selected as biomarkers to evaluate the skin solar radiation response. Results showed that L-Carnosine provides effective prevention against solar radiation damages reducing ROS, AGEs and mitigating the modulation of the selected biomarker genes. In conclusion, we report that our ex vivo skin model is a valuable system to assess the consequences of solar light exposure and the capacity of topically applied L-Carnosine to counteract them.
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Affiliation(s)
| | | | | | - Vincenzo Vindigni
- Clinic of Plastic and Reconstructive Surgery, University of Padova, Padova, Italy
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3
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Slominski RM, Chen JY, Raman C, Slominski AT. Photo-neuro-immuno-endocrinology: How the ultraviolet radiation regulates the body, brain, and immune system. Proc Natl Acad Sci U S A 2024; 121:e2308374121. [PMID: 38489380 PMCID: PMC10998607 DOI: 10.1073/pnas.2308374121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024] Open
Abstract
Ultraviolet radiation (UVR) is primarily recognized for its detrimental effects such as cancerogenesis, skin aging, eye damage, and autoimmune disorders. With exception of ultraviolet B (UVB) requirement in the production of vitamin D3, the positive role of UVR in modulation of homeostasis is underappreciated. Skin exposure to UVR triggers local responses secondary to the induction of chemical, hormonal, immune, and neural signals that are defined by the chromophores and extent of UVR penetration into skin compartments. These responses are not random and are coordinated by the cutaneous neuro-immuno-endocrine system, which counteracts the action of external stressors and accommodates local homeostasis to the changing environment. The UVR induces electrical, chemical, and biological signals to be sent to the brain, endocrine and immune systems, as well as other central organs, which in concert regulate body homeostasis. To achieve its central homeostatic goal, the UVR-induced signals are precisely computed locally with transmission through nerves or humoral signals release into the circulation to activate and/or modulate coordinating central centers or organs. Such modulatory effects will be dependent on UVA and UVB wavelengths. This leads to immunosuppression, the activation of brain and endocrine coordinating centers, and the modification of different organ functions. Therefore, it is imperative to understand the underlying mechanisms of UVR electromagnetic energy penetration deep into the body, with its impact on the brain and internal organs. Photo-neuro-immuno-endocrinology can offer novel therapeutic approaches in addiction and mood disorders; autoimmune, neurodegenerative, and chronic pain-generating disorders; or pathologies involving endocrine, cardiovascular, gastrointestinal, or reproductive systems.
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Affiliation(s)
- Radomir M. Slominski
- Departments of Genetics, the University of Alabama at Birmingham, Birmingham, AL35294
| | - Jake Y. Chen
- Department of Biomedical Informatics and Data Science, the University of Alabama at Birmingham, Birmingham, AL35294
- Comprehensive Cancer Center, Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, AL35294
| | - Chander Raman
- Department of Dermatology, the University of Alabama at Birmingham, Birmingham, AL35294
| | - Andrzej T. Slominski
- Comprehensive Cancer Center, Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, AL35294
- Department of Dermatology, the University of Alabama at Birmingham, Birmingham, AL35294
- Veteran Administration Medical Center, Birmingham, AL35294
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4
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Logesh R, Prasad SR, Chipurupalli S, Robinson N, Mohankumar SK. Natural tyrosinase enzyme inhibitors: A path from melanin to melanoma and its reported pharmacological activities. Biochim Biophys Acta Rev Cancer 2023; 1878:188968. [PMID: 37657683 DOI: 10.1016/j.bbcan.2023.188968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 09/03/2023]
Abstract
The skin containing melanin pigment acts as a protective barrier and counteracts the UVR and other environmental stressors to maintain or restore disrupted cutaneous homeostasis. The production of melanin pigment is dependent on tyrosine levels. L-tyrosine and L-dihydroxyphenylalanine (L-DOPA) can serve both as a substrates and intermediates of melanin synthetic pathway and as inducers and positive regulators of melanogenesis. The biosynthesis of melanin is stimulated upon exposure to UVR, which can also stimulate local production of hormonal factors, which can stimulate melanoma development by altering the chemical properties of eu- and pheomelanin. The process of melanogenesis can be altered by several pathways. One involves activation of POMC, with the production of POMC peptides including MSH and ACTH, which increase intracellular cAMP levels, which activates the MITF, and helps to stimulate tyrosinase (TYR) expression and activity. Defects in OCA1 to 4 affects melanogenic activity via posttranslational modifications resulting in proteasomal degradation and reducing pigmentation. Further, altering, the MITF factor, helps to regulate the expression of MRGE in melanoma, and helps to increase the TYR glycosylation in ER. CRH stimulates POMC peptides that regulate melanogenesis and also by itself can stimulate melanogenesis. The POMC, P53, ACTH, MSH, MC1R, MITF, and 6-BH4 are found to be important regulators for pigmentation. Melanogenesis can affect melanoma behaviour and inhibit immune responses. Therefore, we reviewed natural products that would alter melanin production. Our special focus was on targeting melanin synthesis and TYR enzyme activity to inhibit melanogenesis as an adjuvant therapy of melanotic melanoma. Furthermore, this review also outlines the current updated pharmacological studies targeting the TYR enzyme from natural sources and its consequential effects on melanin production.
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Affiliation(s)
- Rajan Logesh
- Department of Pharmacognosy, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Mysuru 570015, Karnataka, India.
| | - Sagar Rajendra Prasad
- Department of Pharmacognosy, Varadaraja Institute of Pharmaceutical Education and Research, Tumkur 572102, Karnataka, India
| | - Sandhya Chipurupalli
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Ooty, India
| | - Nirmal Robinson
- Cellular Stress and Immune Response Laboratory, Centre for Cancer Biology, University of South Australia, Adelaide, Australia
| | - Suresh Kumar Mohankumar
- Pharmacy, Swansea University Medical School, Singleton Park, Swansea University, Wales SA2 8PP, United Kingdom
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Pihl C, Bendtsen KMS, Jensen HE, Andersen F, Bjerring P, Haedersdal M, Lerche CM. Oral phytochemicals as photoprotectants in UVR exposed hairless mice: A study of hesperidin methyl chalcone, phloroglucinol, and syringic acid. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 246:112760. [PMID: 37535996 DOI: 10.1016/j.jphotobiol.2023.112760] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 07/21/2023] [Indexed: 08/05/2023]
Abstract
Ultraviolet radiation is the primary risk factor for keratinocyte carcinoma. Because of increasing incidence rates, new methods of photoprotection must be explored. Oral supplementation with photoprotective compounds presents a promising alternative. Phytochemical compounds like hesperidin methyl chalcone, phloroglucinol, and syringic acid are particularly of interest because of their antioxidant properties. Our primary outcome was to evaluate the effects of oral phytochemicals on photocarcinogenesis with time until tumour onset as the primary endpoint. A total of 125 hairless C3.Cg-Hrhr/TifBom Tac mice were randomised to receive tap water supplemented with either 100 mg/kg hesperidin methyl chalcone, phloroglucinol, or syringic acid, 600 mg/kg nicotinamide as a positive control, or no supplementation. The mice were irradiated with 3.5 standard erythema doses thrice weekly to induce photocarcinogenesis. Supplementation with the phytochemicals phloroglucinol and syringic acid and nicotinamide delayed tumour onset from a median of 140 days to 151 (p = 0.036), 157 days (p = 0.02), and 178 (p = 2.7·10-5), respectively. Phloroglucinol and nicotinamide supplementation reduced tumour number. Nicotinamide increased UV-induced pigmentation and reduced oedema formation, while phloroglucinol supplementation reduced epidermal thickness. These results indicate that oral supplementation with phloroglucinol and syringic acid protects against photocarcinogenesis in hairless mice, but not to the same extent as nicotinamide.
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Affiliation(s)
- Celina Pihl
- Dept of Dermatology, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark; Dept of Pharmacy, University of Copenhagen, 2400 Copenhagen, Denmark.
| | - Katja M S Bendtsen
- Dept of Veterinary and Animal Sciences, Copenhagen University, 1870 Frederiksberg, Denmark.
| | - Henrik E Jensen
- Dept of Veterinary and Animal Sciences, Copenhagen University, 1870 Frederiksberg, Denmark.
| | - Flemming Andersen
- Dept of Dermatology, Private Hospital Molholm, 7100 Vejle, Denmark; Dept of Dermatology, Aalborg University Hospital, 9100 Aalborg, Denmark.
| | - Peter Bjerring
- Dept of Dermatology, Aalborg University Hospital, 9100 Aalborg, Denmark.
| | - Merete Haedersdal
- Dept of Dermatology, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark; Dept of Clinical Medicine, University of Copenhagen, 2400 Copenhagen, Denmark.
| | - Catharina M Lerche
- Dept of Dermatology, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark; Dept of Pharmacy, University of Copenhagen, 2400 Copenhagen, Denmark.
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Long Y, Wang W, Zhang Y, Du F, Zhang S, Li Z, Deng J, Li J. Photoprotective Effects of Dendrobium nobile Lindl. Polysaccharides against UVB-Induced Oxidative Stress and Apoptosis in HaCaT Cells. Int J Mol Sci 2023; 24:ijms24076120. [PMID: 37047098 PMCID: PMC10094248 DOI: 10.3390/ijms24076120] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
Acute ultraviolet (UV)-B radiation is the major external factor causing photodamage. In this study, we aimed to determine the effects of Dendrobium nobile Lindl. polysaccharides (DNPs) on photodamage in HaCaT keratinocytes after UVB irradiation and the underlying mechanisms. We found that DNPs significantly attenuated the decline in the viability and proliferation of HaCaT cells after UVB irradiation. Moreover, DNPs scavenged reactive oxygen species (ROS), improved the activities of endogenous antioxidant enzymes, including superoxide dismutase, catalase, and glutathione peroxidase, and reduced the levels of malondialdehyde, while partially attenuating cell cycle arrest, suggesting their antioxidant and anti-apoptotic properties. The mitogen-activated protein kinase (MAPK) pathway was found to be important for the attenuation of UVB-induced photodamage in the HaCaT cells. Furthermore, DNPs exerted cytoprotective effects by downregulating UVB-induced ROS-mediated phosphorylation of MAPKs, including p38, c-Jun N-terminal kinase, and extracellular signal-regulated kinase, and by inhibiting p53 expression as well as the apoptotic cascade response. Therefore, DNPs ameliorated UVB-induced oxidative damage and apoptosis in HaCaT cells via the regulation of MAPKs. Our findings thus highlight the Dendrobium nobile Lindl polysaccharides as promising therapeutic candidates for UVB-induced photodamage.
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Affiliation(s)
- Yunluan Long
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Wuji Wang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Yanyan Zhang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Fanpan Du
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Shiqian Zhang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Zheng Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Jiang Deng
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Jingjie Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563006, China
- Key Laboratory of Basic Pharmacology of Guizhou Province, Zunyi Medical University, Zunyi 563006, China
- Department of Pharmacology, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
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Milich KA, Griffin CE, Dong C. Comparison of three canine nose guards for reduction of ultraviolet (UVA and UVB) solar radiation. Vet Dermatol 2023; 34:64-69. [PMID: 36250244 DOI: 10.1111/vde.13132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 05/23/2022] [Accepted: 06/06/2022] [Indexed: 01/05/2023]
Abstract
BACKGROUND Protection from solar ultraviolet (UV) radiation is paramount for some dermatological conditions, yet there are no studies assessing UV nose guards for dogs. OBJECTIVES Compare the ability of three nasal guards to block solar UV radiation (UVR) from the canine nose, using two commercial products and one created by the authors. ANIMALS Four fabric model dogs were used in this prospective controlled trial. MATERIALS AND METHODS Each model had a UV dosimeter applied to the dorsal nose and anterior nasal planum. Three models had nose protectors applied: (1) a mesh hood (OutFox Field Guard, OutFox For Dogs); (2) a fabric nose shield (Nose Protector, Dog Nose Protectors); or (3) a basket muzzle with ultraviolet protection factor (UPF) 50+ fabric developed by the authors. The control had no protective device applied. All the models were placed in direct sunlight and measurements taken over nine 2 h time periods. Total cumulative UVR was analysed for each location and type of guard or control. RESULTS All guards provided statistically significant UV protection compared to control at all time points (p < 0.001). The basket muzzle with UPF 50+ guard was consistent in protecting the dorsal and anterior nose, blocking 94.2% and 94.3% UVR, respectively. The fabric nose protector blocked 99.2% UVR from the dorsal and 82.9% anterior. The mesh hood blocked 72.5% of UVR dorsal and 71.4% anterior. CONCLUSIONS AND CLINICAL RELEVANCE Two guards were superior in blocking UVR; however, the choice of UV guard in a clinical setting depends on an individual's disease location and tolerance of the device.
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Affiliation(s)
| | | | - Charli Dong
- Animal Dermatology Clinic, Pasadena, California, USA
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Slominski AT, Slominski RM, Raman C, Chen JY, Athar M, Elmets C. Neuroendocrine signaling in the skin with a special focus on the epidermal neuropeptides. Am J Physiol Cell Physiol 2022; 323:C1757-C1776. [PMID: 36317800 PMCID: PMC9744652 DOI: 10.1152/ajpcell.00147.2022] [Citation(s) in RCA: 68] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 10/21/2022] [Accepted: 10/21/2022] [Indexed: 11/07/2022]
Abstract
The skin, which is comprised of the epidermis, dermis, and subcutaneous tissue, is the largest organ in the human body and it plays a crucial role in the regulation of the body's homeostasis. These functions are regulated by local neuroendocrine and immune systems with a plethora of signaling molecules produced by resident and immune cells. In addition, neurotransmitters, endocrine factors, neuropeptides, and cytokines released from nerve endings play a central role in the skin's responses to stress. These molecules act on the corresponding receptors in an intra-, juxta-, para-, or autocrine fashion. The epidermis as the outer most component of skin forms a barrier directly protecting against environmental stressors. This protection is assured by an intrinsic keratinocyte differentiation program, pigmentary system, and local nervous, immune, endocrine, and microbiome elements. These constituents communicate cross-functionally among themselves and with corresponding systems in the dermis and hypodermis to secure the basic epidermal functions to maintain local (skin) and global (systemic) homeostasis. The neurohormonal mediators and cytokines used in these communications regulate physiological skin functions separately or in concert. Disturbances in the functions in these systems lead to cutaneous pathology that includes inflammatory (i.e., psoriasis, allergic, or atopic dermatitis, etc.) and keratinocytic hyperproliferative disorders (i.e., seborrheic and solar keratoses), dysfunction of adnexal structure (i.e., hair follicles, eccrine, and sebaceous glands), hypersensitivity reactions, pigmentary disorders (vitiligo, melasma, and hypo- or hyperpigmentary responses), premature aging, and malignancies (melanoma and nonmelanoma skin cancers). These cellular, molecular, and neural components preserve skin integrity and protect against skin pathologies and can act as "messengers of the skin" to the central organs, all to preserve organismal survival.
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Affiliation(s)
- Andrzej T Slominski
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
- Comprehensive Cancer Center, Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, Alabama
- VA Medical Center, Birmingham, Alabama
| | - Radomir M Slominski
- Graduate Biomedical Sciences Program, University of Alabama at Birmingham, Birmingham, Alabama
| | - Chander Raman
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jake Y Chen
- Informatics Institute, University of Alabama at Birmingham, Birmingham, Alabama
| | - Mohammad Athar
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
- VA Medical Center, Birmingham, Alabama
| | - Craig Elmets
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama
- Comprehensive Cancer Center, Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, Alabama
- VA Medical Center, Birmingham, Alabama
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Targeting Melanin in Melanoma with Radionuclide Therapy. Int J Mol Sci 2022; 23:ijms23179520. [PMID: 36076924 PMCID: PMC9455397 DOI: 10.3390/ijms23179520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/13/2022] [Accepted: 08/20/2022] [Indexed: 11/17/2022] Open
Abstract
Nearly 100,000 individuals are expected to be diagnosed with melanoma in the United States in 2022. Treatment options for late-stage metastatic disease up until the 2010s were few and offered only slight improvement to the overall survival. The introduction of B-RAF inhibitors and anti-CTLA4 and anti-PD-1/PD-L1 immunotherapies into standard of care brought measurable increases in the overall survival across all stages of melanoma. Despite the improvement in the survival statistics, patients treated with targeted therapies and immunotherapies are subject to very serious side effects, the development of drug resistance, and the high costs of treatment. This leaves room for the development of novel approaches as well as for the exploration of novel combination therapies for the treatment of metastatic melanoma. One such approach is targeting melanin pigment with radionuclide therapy. Advances in melanin-targeting radionuclide therapy of melanoma can be viewed from two spheres: (1) radioimmunotherapy (RIT) and (2) radiolabeled small molecules. The investigation of mechanisms of the action and efficacy of targeting melanin in melanoma treatment by RIT points to the involvement of the immune system such as complement dependent cytotoxicity. The combination of RIT with immunotherapy presents synergistic killing in mouse melanoma models. The field of radiolabeled small molecules is focused on radioiodinated compounds that have the ability to cross the cellular membranes to access intracellular melanin and can be applied in both therapy and imaging as theranostics. Clinical applications of targeting melanin with radionuclide therapies have produced encouraging results and clinical work is on-going. Continued work on targeting melanin with radionuclide therapy as a monotherapy, or possibly in combination with standard of care agents, has the potential to strengthen the current treatment options for melanoma patients.
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Xeroderma Pigmentosum C: A Valuable Tool to Decipher the Signaling Pathways in Skin Cancers. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6689403. [PMID: 34630850 PMCID: PMC8495593 DOI: 10.1155/2021/6689403] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 03/24/2021] [Accepted: 04/19/2021] [Indexed: 12/13/2022]
Abstract
Xeroderma pigmentosum (XP) is a rare autosomal genodermatosis that manifests clinically with pronounced sensitivity to ultraviolet (UV) radiation and the high probability of the occurrence of different skin cancer types in XP patients. XP is mainly caused by mutations in XP-genes that are involved in the nucleotide excision repair (NER) pathway that functions in the removal of bulky DNA adducts. Besides, the aggregation of DNA lesions is a life-threatening event that might be a key for developing various mutations facilitating cancer appearance. One of the key players of NER is XPC that senses helical distortions found in damaged DNA. The majority of XPC gene mutations are nonsense, and some are missense leading either to the loss of XPC protein or to the expression of a truncated nonfunctional version. Given that no cure is yet available, XPC patients should be completely protected and isolated from all types of UV radiations (UVR). Although it is still poorly understood, the characterization of the proteomic signature of an XPC mutant is essential to identify mediators that could be targeted to prevent cancer development in XPC patients. Unraveling this proteomic signature is fundamental to decipher the signaling pathways affected by the loss of XPC expression following exposure to UVB radiation. In this review, we will focus on the signaling pathways disrupted in skin cancer, pathways modulating NER's function, including XPC, to disclose signaling pathways associated with XPC loss and skin cancer occurrence.
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11
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Mu J, Ma H, Chen H, Zhang X, Ye M. Luteolin Prevents UVB-Induced Skin Photoaging Damage by Modulating SIRT3/ROS/MAPK Signaling: An in vitro and in vivo Studies. Front Pharmacol 2021; 12:728261. [PMID: 34526903 PMCID: PMC8436182 DOI: 10.3389/fphar.2021.728261] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/12/2021] [Indexed: 02/03/2023] Open
Abstract
The aim of this study was to investigate the role of luteolin in the mechanism of ultraviolet radiation B (UVB)-induced photoaging. An in vivo photoaging model was established using UVB irradiation of bare skin on the back of rats, and an in vitro photoaging model was established using UVB irradiation of human dermal fibroblasts (HDF). Skin damage was observed using hematoxylin-eosin (HE) and Masson staining, skin and cellular reactive oxygen species (ROS) levels were detected by DHE and DCF fluorescent probes, mitochondrial membrane potential was detected by JC-1 staining, and protein expressions were detected by immunofluorescence and Western Blot. Results from animal experiments showed that luteolin reduced UVB-induced erythema and wrinkle formation. Results from cellular assays showed that luteolin inhibited UVB-induced decrease in cell viability. In addition, in vitro and in vivo experiments showed that luteolin reduced oxidative stress levels, decreased activation of matrix metalloproteinases (MMPs) and increased collagen expression. Continued cellular experiments using 3-TYP, an inhibitor of Sirtuin 3 (SIRT3), revealed a loss of cellular protection by luteolin and a decrease in collagen, suggesting that luteolin acts by targeting and promoting SIRT3. luteolin is involved in the protection of skin cells against UVB radiation-induced ageing via the SIRT3/ROS/mitogen-activated protein kinases (MAPK) axis and it may be a promising therapeutic agent for the prevention of UVB photoaging.
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Affiliation(s)
- Jing Mu
- School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China
| | - Huisheng Ma
- School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China
| | - Hong Chen
- School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China
| | - Xiaoxia Zhang
- School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China
| | - Mengyi Ye
- School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China
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12
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Li Y, Xia C, Yao G, Zhang X, Zhao J, Gao X, Yong J, Wang H. Protective effects of liquiritin on UVB-induced skin damage in SD rats. Int Immunopharmacol 2021; 97:107614. [PMID: 33892299 DOI: 10.1016/j.intimp.2021.107614] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 03/14/2021] [Accepted: 03/22/2021] [Indexed: 12/24/2022]
Abstract
Overexposure to ultraviolet B (UVB) rays can cause damage to the skin. Liquiritin has a variety of pharmacological effects, such as anti-inflammatory and antioxidant. In the present study, the effect of liquiritin on UVB irradiated rat skin was investigated. Results showed that UVB irradiation caused erythema and wrinkles on the skin surface, as well as thickening and loss of elasticity of the epidermis and a significant increase in the level of ROS in the skin tissue. At the same time, western blot detected an increase in nuclear factor kappa-B (NF-κB) and matrix metalloproteinases (MMPs) and Elisa also detected an increase in pro-inflammatory factors. Therefore, we hypothesized that UVB irradiation-induced damage is associated with inflammation. Interestingly, application of liquiritin to exposed skin of rats reduced the increase in ROS, pro-inflammatory factors, and MMPs caused by UVB irradiation and increased the levels of Sirtuin3 (SIRT3) and Collagen α1. In addition, after intraperitoneal injection of the SIRT3 inhibitor 3-TYP in rats, the protective effect of liquiritin against UVB damage was found to be diminished. These results suggested that promotion of SIRT3 with liquiritin inhibits UVB-induced production of pro-inflammatory mediators, possibly acting through the SIRT3/ROS/NF-κB pathway. In conclusion, this study suggests that liquiritin is an effective drug candidate for the prevention of UVB damage.
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Affiliation(s)
- Yuanjie Li
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China
| | - Changbo Xia
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China
| | - Guangda Yao
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China
| | - Xia Zhang
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China
| | - Jianjun Zhao
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China
| | - Xiaojuan Gao
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China
| | - Jingjiao Yong
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China
| | - Hanqing Wang
- College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan 750004 Ningxia, China; Ningxia Engineering and Technology Research Center for Modernization of Regional Characteristic Traditional Chinese Medicine, Ningxia Medical University, Yinchuan, China; Key Laboratory of Hui Ethnic Medicine Modernisation, Ministry of Education, Ningxia Medical University, Yinchuan, China.
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13
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Abstract
Melanogenesis is a highly regulated process through which the pigment melanin is produced in skin cells. Irregularities in the molecular events that govern the process of skin pigmentation can cause disorders like vitiligo. In order to understand the biology of disease progression, it is important to have an in depth understanding of intracellular events. Mathematical models provide an integrated view of intracellular signalling. There are very few models to date that incorporate intracellular processes relevant to melanogenesis and only one to our knowledge that simulates the dynamics of response to varying levels of input. Here, we report the formulation of the largest Boolean model (265 nodes) for melanogenesis to date. The model was built on the basis of a detailed interaction network graph published by Raghunath et al. Through additional manual curation of the reported interactions, we converted the graph into a set of Boolean rules, following the procedure of the first Boolean model (62 nodes) for melanogenesis published by Lee et al. Simulations show that the predicted response to varying UV levels for most of the nodes is similar to the predictions of the existing model. The greater complexity allows investigation of the sensitivity of melanin to additional nodes. We carried out perturbation analysis of the network through node deletion and constitutive activation to identify sensitivity of outcomes, and compared the nodes identified as sensitive to previous reports.
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Affiliation(s)
- Pooja Dnyane
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411008, India. Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Ghaziabad 201002, India
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14
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Sun X, Zhang N, Yin C, Zhu B, Li X. Ultraviolet Radiation and Melanomagenesis: From Mechanism to Immunotherapy. Front Oncol 2020; 10:951. [PMID: 32714859 PMCID: PMC7343965 DOI: 10.3389/fonc.2020.00951] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/14/2020] [Indexed: 12/13/2022] Open
Abstract
Melanoma is the deadliest form of skin cancer, and nearly 90% of melanomas are believed to be caused by ultraviolet radiation (UVR), mainly from sunlight. UVR induces DNA damage, forming products such as cyclobutane pyrimidine dimers (CPD) and 6-4-pyrimidone photoproducts (6-4PP) in a wavelength-dependent manner and causes oxidative DNA damage. These DNA lesions lead to DNA mutations and contribute to the formation of melanoma. In this review, we discuss the protective role of melanocytes against UV-induced DNA damage and how genetic variations, including those in p53 and melanocortin-1 receptor (MC1R), or epigenetic histone modifications in melanocytes result in a tendency toward melanoma. We also provide a summary of prevention and treatment strategies against melanoma, including the most recent immunotherapies. Collectively, this work contributes to the understanding of the molecular pathogenesis of UV-induced melanoma.
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Affiliation(s)
- Xiaoying Sun
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
| | - Na Zhang
- Department of Cardiology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chengqian Yin
- Department of Dermatology, Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Bo Zhu
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, United States
| | - Xin Li
- Department of Dermatology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Dermatology, Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
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15
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Han C, Yang H, Li B, Wang Z. Exogenous pyruvate facilitates ultraviolet B-induced DNA damage repair by promoting H3K9 acetylation in keratinocytes and melanocytes. Biomed Pharmacother 2020; 126:110082. [PMID: 32163747 DOI: 10.1016/j.biopha.2020.110082] [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: 12/12/2019] [Revised: 03/03/2020] [Accepted: 03/05/2020] [Indexed: 01/22/2023] Open
Abstract
Ultraviolet radiation (UVR) is the major cause of numerous skin diseases, including sunburn, skin aging, and skin cancers. Pyruvate is a key intermediate in cellular metabolic pathways, which has shown protective effects against oxidative stress and apoptosis, but its role in UV protection remains unclear. Here we established human and mice in vivo model and found that pyruvate protects both human and mouse skin from UVB-induced DNA damage. Moreover, assays in primary keratinocytes and melanocytes further supported the protective role of exogenous pyruvate against UVB-induced DNA damage. Mechanically, pyruvate stimulates the activation of Histone H3 Lysine 9 (H3K9) acetylation, which is an essential step for nucleotide excision repair (NER) pathway. In conclusion, our results suggest that treatment of pyruvate might be an effective strategy to prevent UVB-induced skin diseases.
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Affiliation(s)
- Changpeng Han
- Institute of TCM Surgery, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
| | - Haojie Yang
- Institute of TCM Surgery, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
| | - Bin Li
- Institute of TCM Surgery, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
| | - Zhenyi Wang
- Institute of TCM Surgery, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China.
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16
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Brożyna AA, Hoffman RM, Slominski AT. Relevance of Vitamin D in Melanoma Development, Progression and Therapy. Anticancer Res 2020; 40:473-489. [PMID: 31892603 PMCID: PMC6948187 DOI: 10.21873/anticanres.13976] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/22/2019] [Accepted: 10/30/2019] [Indexed: 12/11/2022]
Abstract
Melanoma is one of the most lethal types of skin cancer, with a poor prognosis once the disease enters metastasis. The efficacy of currently available treatment schemes for advanced melanomas is low, expensive, and burdened by significant side-effects. Therefore, there is a need to develop new treatment options. Skin cells are able to activate vitamin D via classical and non-classical pathways. Vitamin D derivatives have anticancer properties which promote differentiation and inhibit proliferation. The role of systemic vitamin D in patients with melanoma is unclear as epidemiological studies are not definitive. In contrast, experimental data have clearly shown that vitamin D and its derivatives have anti-melanoma properties. Furthermore, molecular and clinicopathological studies have demonstrated a correlation between defects in vitamin D signaling and progression of melanoma and disease outcome. Therefore, adequate vitamin D signaling can play a role in the treatment of melanoma.
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Affiliation(s)
- Anna A Brożyna
- Department of Human Biology, Institute of Biology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Toruń, Poland
| | | | - Andrzej T Slominski
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, U.S.A. .,Comprehensive Cancer Center, Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, AL, U.S.A.,VA Medical Center, Birmingham, AL, U.S.A
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17
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Slominski AT, Brożyna AA, Zmijewski MA, Janjetovic Z, Kim TK, Slominski RM, Tuckey RC, Mason RS, Jetten AM, Guroji P, Reichrath J, Elmets C, Athar M. The Role of Classical and Novel Forms of Vitamin D in the Pathogenesis and Progression of Nonmelanoma Skin Cancers. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1268:257-283. [PMID: 32918223 PMCID: PMC7490773 DOI: 10.1007/978-3-030-46227-7_13] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nonmelanoma skin cancers including basal and squamous cell carcinomas (SCC and BCC) represent a significant clinical problem due to their relatively high incidence, imposing an economic burden to healthcare systems around the world. It is accepted that ultraviolet radiation (UVR: λ = 290-400 nm) plays a crucial role in the initiation and promotion of BCC and SCC with UVB (λ = 290-320 nm) having a central role in this process. On the other hand, UVB is required for vitamin D3 (D3) production in the skin, which supplies >90% of the body's requirement for this prohormone. Prolonged exposure to UVB can also generate tachysterol and lumisterol. Vitamin D3 itself and its canonical (1,25(OH)2D3) and noncanonical (CYP11A1-intitated) D3 hydroxyderivatives show photoprotective functions in the skin. These include regulation of keratinocyte proliferation and differentiation, induction of anti-oxidative responses, inhibition of DNA damage and induction of DNA repair mechanisms, and anti-inflammatory activities. Studies in animals have demonstrated that D3 hydroxyderivatives can attenuate UVB or chemically induced epidermal cancerogenesis and inhibit growth of SCC and BCC. Genomic and non-genomic mechanisms of action have been suggested. In addition, vitamin D3 itself inhibits hedgehog signaling pathways which have been implicated in many cancers. Silencing of the vitamin D receptor leads to increased propensity to develop UVB or chemically induced epidermal cancers. Other targets for vitamin D compounds include 1,25D3-MARRS, retinoic orphan receptors α and γ, aryl hydrocarbon receptor, and Wnt signaling. Most recently, photoprotective effects of lumisterol hydroxyderivatives have been identified. Clinical trials demonstrated a beneficial role of vitamin D compounds in the treatment of actinic keratosis. In summary, recent advances in vitamin D biology and pharmacology open new exciting opportunities in chemoprevention and treatment of skin cancers.
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Affiliation(s)
- Andrzej T Slominski
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA.
- Comprehensive Cancer Center, Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, AL, USA.
- VA Medical Center, Birmingham, AL, USA.
| | - Anna A Brożyna
- Department of Human Biology, Institute of Biology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Toruń, Poland
| | | | - Zorica Janjetovic
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Tae-Kang Kim
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Radomir M Slominski
- Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Robert C Tuckey
- School of Molecular Sciences, The University of Western Australia, Perth, WA, Australia
| | - Rebecca S Mason
- Physiology & Bosch Institute, School of Medical Sciences, Faculty of Medicine & Health, The University of Sydney, Sydney, NSW, Australia
| | - Anton M Jetten
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Purushotham Guroji
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jörg Reichrath
- Center for Clinical and Experimental Photodermatology and Department of Dermatology, Saarland University Medical Center, Homburg, Germany
| | - Craig Elmets
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Mohammad Athar
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, USA
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18
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Eickelbeck D, Rudack T, Tennigkeit SA, Surdin T, Karapinar R, Schwitalla JC, Mücher B, Shulman M, Scherlo M, Althoff P, Mark MD, Gerwert K, Herlitze S. Lamprey Parapinopsin ("UVLamP"): a Bistable UV-Sensitive Optogenetic Switch for Ultrafast Control of GPCR Pathways. Chembiochem 2019; 21:612-617. [PMID: 31468691 PMCID: PMC7079062 DOI: 10.1002/cbic.201900485] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Indexed: 12/17/2022]
Abstract
Optogenetics uses light‐sensitive proteins, so‐called optogenetic tools, for highly precise spatiotemporal control of cellular states and signals. The major limitations of such tools include the overlap of excitation spectra, phototoxicity, and lack of sensitivity. The protein characterized in this study, the Japanese lamprey parapinopsin, which we named UVLamP, is a promising optogenetic tool to overcome these limitations. Using a hybrid strategy combining molecular, cellular, electrophysiological, and computational methods we elucidated a structural model of the dark state and probed the optogenetic potential of UVLamP. Interestingly, it is the first described bistable vertebrate opsin that has a charged amino acid interacting with the Schiff base in the dark state, that has no relevance for its photoreaction. UVLamP is a bistable UV‐sensitive opsin that allows for precise and sustained optogenetic control of G protein‐coupled receptor (GPCR) pathways and can be switched on, but more importantly also off within milliseconds via lowintensity short light pulses. UVLamP exhibits an extremely narrow excitation spectrum in the UV range allowing for sustained activation of the Gi/o pathway with a millisecond UV light pulse. Its sustained pathway activation can be switched off, surprisingly also with a millisecond blue light pulse, minimizing phototoxicity. Thus, UVLamP serves as a minimally invasive, narrow‐bandwidth probe for controlling the Gi/o pathway, allowing for combinatorial use with multiple optogenetic tools or sensors. Because UVLamP activated Gi/o signals are generally inhibitory and decrease cellular activity, it has tremendous potential for health‐related applications such as relieving pain, blocking seizures, and delaying neurodegeneration.
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Affiliation(s)
- Dennis Eickelbeck
- Department of General Zoology and Neurobiology, Ruhr University Bochum, ND7/31, Universitätsstasse 150, 44780, Bochum, Germany
| | - Till Rudack
- Biospectroscopy, Center for Protein Diagnostics (ProDi), Ruhr University Bochum, Gesundheitscampus 4, 44801, Bochum, Germany.,Department of Biophysics, Ruhr University Bochum, ND04/596, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Stefan Alexander Tennigkeit
- Biospectroscopy, Center for Protein Diagnostics (ProDi), Ruhr University Bochum, Gesundheitscampus 4, 44801, Bochum, Germany.,Department of Biophysics, Ruhr University Bochum, ND04/596, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Tatjana Surdin
- Department of General Zoology and Neurobiology, Ruhr University Bochum, ND7/31, Universitätsstasse 150, 44780, Bochum, Germany
| | - Raziye Karapinar
- Department of General Zoology and Neurobiology, Ruhr University Bochum, ND7/31, Universitätsstasse 150, 44780, Bochum, Germany
| | - Jan-Claudius Schwitalla
- Department of General Zoology and Neurobiology, Ruhr University Bochum, ND7/31, Universitätsstasse 150, 44780, Bochum, Germany
| | - Brix Mücher
- Department of General Zoology and Neurobiology, Ruhr University Bochum, ND7/31, Universitätsstasse 150, 44780, Bochum, Germany
| | - Maiia Shulman
- Biospectroscopy, Center for Protein Diagnostics (ProDi), Ruhr University Bochum, Gesundheitscampus 4, 44801, Bochum, Germany.,Department of Biophysics, Ruhr University Bochum, ND04/596, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Marvin Scherlo
- Biospectroscopy, Center for Protein Diagnostics (ProDi), Ruhr University Bochum, Gesundheitscampus 4, 44801, Bochum, Germany.,Department of Biophysics, Ruhr University Bochum, ND04/596, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Philipp Althoff
- Biospectroscopy, Center for Protein Diagnostics (ProDi), Ruhr University Bochum, Gesundheitscampus 4, 44801, Bochum, Germany.,Department of Biophysics, Ruhr University Bochum, ND04/596, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Melanie D Mark
- Department of General Zoology and Neurobiology, Ruhr University Bochum, ND7/31, Universitätsstasse 150, 44780, Bochum, Germany
| | - Klaus Gerwert
- Biospectroscopy, Center for Protein Diagnostics (ProDi), Ruhr University Bochum, Gesundheitscampus 4, 44801, Bochum, Germany.,Department of Biophysics, Ruhr University Bochum, ND04/596, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Stefan Herlitze
- Department of General Zoology and Neurobiology, Ruhr University Bochum, ND7/31, Universitätsstasse 150, 44780, Bochum, Germany
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19
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Jamil MU, Kim J, Yum HW, Kim SH, Kim SJ, Kim DH, Cho NC, Na HK, Surh YJ. 17-Oxo-docosahexaenoic acid induces Nrf2-mediated expression of heme oxygenase-1 in mouse skin in vivo and in cultured murine epidermal cells. Arch Biochem Biophys 2019; 679:108156. [PMID: 31629711 DOI: 10.1016/j.abb.2019.108156] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 10/09/2019] [Accepted: 10/16/2019] [Indexed: 12/14/2022]
Abstract
Recently, growing attention has been given to new classes of bioactive lipid mediators derived from ω-3 polyunsaturated fatty acids, such as docosahexaenoic acid (DHA), especially in the context of their role as endogenous signal modulators. One such molecule is 17-oxo-DHA, generated from DHA by the action of COX2 and a dehydrogenase. The redox-sensitive transcription factor, Nrf2 plays a key role in cellular stress responses. In the present study, the effects of 17-oxo-DHA on Nrf2-mediated expression of cytoprotective enzymes were examined in mouse skin in vivo and cultured murine epidermal JB6 cells. Topical application of 17-oxo-DHA markedly elevated the nuclear localization of Nrf2 and expression of heme oxygenase-1 (HO-1) and NAD(P)H:quinone oxidoreductase-1 in hairless mouse skin. In contrast to 17-oxo-DHA, the non-electrophilic metabolic precursor 17-hydroxy-DHA was a much weaker inducer of Nrf2 activation and its target protein expression. Likewise, 17-oxo-DHA significantly enhanced nuclear translocation and transcriptional activity of Nrf2 with concomitant upregulation of HO-1 expression in cultured JB6 cells. 17-Oxo-DHA was a much stronger inducer of Nrf2-mediated antioxidant response than its parent molecule, DHA. HO-1 expression was abolished in Nrf2 knockdown JB6 cells or embryo fibroblasts from Nrf2 knock out mice. 17-Oxo-DHA also markedly reduced the level of Keap1 protein by inducing ubiquitination. Mutation of Cys151 and Cys273 in Keap1 abrogated 17-oxo-DHA-induced ubiquitination and proteasome-mediated degradation of Keap1 as well as HO-1 expression, suggesting that these cysteine residues are putative sites for 17-oxo-DHA binding. Further, Keap1 degradation stimulated by 17-oxo-DHA coincided with accumulation of the autophagy substrate, p62/SQSTM1.
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Affiliation(s)
- Muhammad Usman Jamil
- Department of Molecular Medicine and Biopharmaceutical Science, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, 08826, South Korea
| | - Jimin Kim
- Department of Molecular Medicine and Biopharmaceutical Science, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, 08826, South Korea
| | - Hye-Won Yum
- Tumor Microenvironment Global Core Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea
| | - Seong Hoon Kim
- Tumor Microenvironment Global Core Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea
| | - Su-Jung Kim
- Tumor Microenvironment Global Core Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea; Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, South Korea
| | - Do-Hee Kim
- Department of Molecular Medicine and Biopharmaceutical Science, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, 08826, South Korea; Tumor Microenvironment Global Core Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea
| | - Nam-Chul Cho
- C&C Research Laboratories, DRC, Sungyunkwan University, Suwon, 16419, South Korea
| | - Hye-Kyung Na
- Department of Food Science and Biotechnology, College of Knowledge-based Services Engineering, Sungshin Women's University, Seoul, 01133, South Korea
| | - Young-Joon Surh
- Department of Molecular Medicine and Biopharmaceutical Science, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, 08826, South Korea; Tumor Microenvironment Global Core Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea; Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826, South Korea; Cancer Research Institute, Seoul National University, Seoul, 03080, South Korea.
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20
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San-Jose LM, Roulin A. Toward Understanding the Repeated Occurrence of Associations between Melanin-Based Coloration and Multiple Phenotypes. Am Nat 2018; 192:111-130. [PMID: 30016163 DOI: 10.1086/698010] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Melanin is the most widespread pigment in organisms. Melanin-based coloration has been repeatedly observed to be associated with the same traits and in the same direction in different vertebrate and insect species. However, whether any factors that are common to different taxa account for the repeated evolution of melanin-phenotype associations remains unclear. We propose to approach this question from the perspective of convergent and parallel evolution to clarify to what extent different species have evolved the same associations owing to a shared genetic basis and being subjected to similar selective pressures. Our current understanding of the genetic basis of melanin-phenotype associations allows for both convergent and parallel evolution, but this understanding is still limited. Further research is needed to clarify the generality and interdependencies of the different proposed mechanisms (supergenes, pleiotropy based on hormones, or neural crest cells). The general ecological scenarios whereby melanin-based coloration is under selection-protection from ultraviolet radiation, thermoregulation in cold environments, or as a signal of social status-offer a good opportunity to study how melanin-phenotype associations evolve. Reviewing these scenarios shows that some traits associated with melanin-based coloration might be selected together with coloration by also favoring adaptation but that other associated traits might impede adaptation, which may be indicative of genetic constraints. We therefore encourage further research on the relative roles that selection and genetic constraints play in shaping multiple melanin-phenotype associations. Placed into a phylogenetic context, this will help clarify to what extent these associations result from convergent or parallel evolutionary processes and why melanin-phenotype associations are so common across the tree of life.
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21
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Slominski AT, Zmijewski MA, Plonka PM, Szaflarski JP, Paus R. How UV Light Touches the Brain and Endocrine System Through Skin, and Why. Endocrinology 2018; 159:1992-2007. [PMID: 29546369 PMCID: PMC5905393 DOI: 10.1210/en.2017-03230] [Citation(s) in RCA: 293] [Impact Index Per Article: 48.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 02/16/2018] [Indexed: 12/15/2022]
Abstract
The skin, a self-regulating protective barrier organ, is empowered with sensory and computing capabilities to counteract the environmental stressors to maintain and restore disrupted cutaneous homeostasis. These complex functions are coordinated by a cutaneous neuro-endocrine system that also communicates in a bidirectional fashion with the central nervous, endocrine, and immune systems, all acting in concert to control body homeostasis. Although UV energy has played an important role in the origin and evolution of life, UV absorption by the skin not only triggers mechanisms that defend skin integrity and regulate global homeostasis but also induces skin pathology (e.g., cancer, aging, autoimmune responses). These effects are secondary to the transduction of UV electromagnetic energy into chemical, hormonal, and neural signals, defined by the nature of the chromophores and tissue compartments receiving specific UV wavelength. UV radiation can upregulate local neuroendocrine axes, with UVB being markedly more efficient than UVA. The locally induced cytokines, corticotropin-releasing hormone, urocortins, proopiomelanocortin-peptides, enkephalins, or others can be released into circulation to exert systemic effects, including activation of the central hypothalamic-pituitary-adrenal axis, opioidogenic effects, and immunosuppression, independent of vitamin D synthesis. Similar effects are seen after exposure of the eyes and skin to UV, through which UVB activates hypothalamic paraventricular and arcuate nuclei and exerts very rapid stimulatory effects on the brain. Thus, UV touches the brain and central neuroendocrine system to reset body homeostasis. This invites multiple therapeutic applications of UV radiation, for example, in the management of autoimmune and mood disorders, addiction, and obesity.
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Affiliation(s)
- Andrzej T Slominski
- Department of Dermatology, Comprehensive Cancer Center Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, Alabama
- VA Medical Center, Birmingham, Alabama
- Correspondence: Andrzej T. Slominski, MD, PhD, Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama 35294. E-mail:
| | | | - Przemyslaw M Plonka
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Jerzy P Szaflarski
- Departments of Neurology and Neurobiology and the UAB Epilepsy Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Ralf Paus
- Centre for Dermatology Research, University of Manchester, Manchester, United Kingdom
- Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida
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22
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Śniegocka M, Podgórska E, Płonka PM, Elas M, Romanowska-Dixon B, Szczygieł M, Żmijewski MA, Cichorek M, Markiewicz A, Brożyna AA, Słominski AT, Urbańska K. Transplantable Melanomas in Hamsters and Gerbils as Models for Human Melanoma. Sensitization in Melanoma Radiotherapy-From Animal Models to Clinical Trials. Int J Mol Sci 2018; 19:E1048. [PMID: 29614755 PMCID: PMC5979283 DOI: 10.3390/ijms19041048] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 12/18/2022] Open
Abstract
The focus of the present review is to investigate the role of melanin in the radioprotection of melanoma and attempts to sensitize tumors to radiation by inhibiting melanogenesis. Early studies showed radical scavenging, oxygen consumption and adsorption as mechanisms of melanin radioprotection. Experimental models of melanoma in hamsters and in gerbils are described as well as their use in biochemical and radiobiological studies, including a spontaneously metastasizing ocular model. Some results from in vitro studies on the inhibition of melanogenesis are presented as well as radio-chelation therapy in experimental and clinical settings. In contrast to cutaneous melanoma, uveal melanoma is very successfully treated with radiation, both using photon and proton beams. We point out that the presence or lack of melanin pigmentation should be considered, when choosing therapeutic options, and that both the experimental and clinical data suggest that melanin could be a target for radiosensitizing melanoma cells to increase efficacy of radiotherapy against melanoma.
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Affiliation(s)
- Martyna Śniegocka
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University in Kraków, 31-007 Kraków, Poland.
| | - Ewa Podgórska
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University in Kraków, 31-007 Kraków, Poland.
| | - Przemysław M Płonka
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University in Kraków, 31-007 Kraków, Poland.
| | - Martyna Elas
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University in Kraków, 31-007 Kraków, Poland.
| | - Bożena Romanowska-Dixon
- Department of Ophthalmology and Ocular Oncology, Medical College of Jagiellonian University in Kraków, 31-007 Kraków, Poland.
| | - Małgorzata Szczygieł
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University in Kraków, 31-007 Kraków, Poland.
| | - Michał A Żmijewski
- Department of Histology, Medical University of Gdansk, 80-210 Gdańsk, Poland.
| | - Mirosława Cichorek
- Department of Embryology, Medical University of Gdansk, 80-210 Gdańsk, Poland.
| | - Anna Markiewicz
- Department of Ophthalmology and Ocular Oncology, Medical College of Jagiellonian University in Kraków, 31-007 Kraków, Poland.
| | - Anna A Brożyna
- Department of Tumor Pathology and Pathomorphology, Faculty of Health Sciences, Nicolaus Copernicus University Collegium Medicum in Bydgoszcz, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital, 85-796 Bydgoszcz, Poland.
- Department of Dermatology, Comprehensive Cancer Center Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
| | - Andrzej T Słominski
- Department of Dermatology, Comprehensive Cancer Center Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
- VA Medical Center, Birmingham, AL 35294, USA.
| | - Krystyna Urbańska
- Department of Biophysics, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University in Kraków, 31-007 Kraków, Poland.
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23
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Yum HW, Park J, Park HJ, Shin JW, Cho YY, Kim SJ, Kang JX, Surh YJ. Endogenous ω-3 Fatty Acid Production by fat-1 Transgene and Topically Applied Docosahexaenoic Acid Protect against UVB-induced Mouse Skin Carcinogenesis. Sci Rep 2017; 7:11658. [PMID: 28912452 PMCID: PMC5599646 DOI: 10.1038/s41598-017-11443-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 08/24/2017] [Indexed: 01/18/2023] Open
Abstract
The present study was intended to explore the effects of endogenously produced ω-3 polyunsaturated fatty acids (PUFAs) on ultraviolet B (UVB)-induced skin inflammation and photocarcinogenesis using hairless fat-1 transgenic mice harboring ω-3 desaturase gene capable of converting ω-6 to ω-3 PUFAs. Upon exposure to UVB irradiation, fat-1 transgenic mice exhibited a significantly reduced epidermal hyperplasia, oxidative skin damage, and photocarcinogenesis as compared to wild type mice. The transcription factor, Nrf2 is a master regulator of anti-inflammatory and antioxidant gene expression. While the protein expression of Nrf2 was markedly enhanced, the level of its mRNA transcript was barely changed in the fat-1 transgenic mouse skin. Topical application of docosahexaenoic acid (DHA), a representative ω-3 PUFA, in wild type hairless mice induced expression of the Nrf2 target protein, heme oxygenase-1 in the skin and protected against UVB-induced oxidative stress, inflammation and papillomagenesis. Furthermore, transient overexpression of fat-1 gene in mouse epidermal JB6 cells resulted in the enhanced accumulation of Nrf2 protein. Likewise, DHA treated to JB6 cells inhibited Nrf2 ubiquitination and stabilized it. Taken together, our results indicate that functional fat-1 and topically applied DHA potentiate cellular defense against UVB-induced skin inflammation and photocarcinogenesis through elevated activation of Nrf2 and upregulation of cytoprotective gene expression.
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Affiliation(s)
- Hye-Won Yum
- Tumor Microenvironment Global Core Research Center, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea.,Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea
| | - Jin Park
- Tumor Microenvironment Global Core Research Center, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Sciences and Technology, Seoul National University, Seoul, 08826, South Korea
| | - Hyun-Jung Park
- Cancer Research Institute, Seoul National University, Seoul, 03080, South Korea
| | - Jun Wan Shin
- Tumor Microenvironment Global Core Research Center, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea.,Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea
| | - Yong-Yeon Cho
- Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea, Bucheon, Gyeonggi-do, 420-743, South Korea
| | - Su-Jung Kim
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Sciences and Technology, Seoul National University, Seoul, 08826, South Korea
| | - Jing X Kang
- Laboratory for Lipid Medicine and Technology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02129, USA
| | - Young-Joon Surh
- Tumor Microenvironment Global Core Research Center, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea. .,Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, South Korea. .,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Sciences and Technology, Seoul National University, Seoul, 08826, South Korea. .,Cancer Research Institute, Seoul National University, Seoul, 03080, South Korea.
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24
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Lupu M, Caruntu A, Caruntu C, Papagheorghe LML, Ilie MA, Voiculescu V, Boda D, Constantin C, Tanase C, Sifaki M, Drakoulis N, Mamoulakis C, Tzanakakis G, Neagu M, Spandidos DA, Izotov BN, Tsatsakis AM. Neuroendocrine factors: The missing link in non‑melanoma skin cancer (Review). Oncol Rep 2017; 38:1327-1340. [PMID: 28713981 PMCID: PMC5549028 DOI: 10.3892/or.2017.5817] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/29/2017] [Indexed: 02/06/2023] Open
Abstract
Non‑melanoma skin cancer (NMSC) is the most common form of cancer worldwide, comprising 95% of all cutaneous malignancies and approximately 40% of all cancers. In spite of intensive efforts aimed towards awareness campaigns and sun‑protective measures, epidemiological data indicate an increase in the incidence of NMSC. This category of skin cancers has many common environmental triggers. Arising primarily on sun‑exposed skin, it has been shown that ultraviolet radiation is, in the majority of cases, the main trigger involved in the pathogenesis of NMSC. Aside from the well‑known etiopathogenic factors, studies have indicated that several neuroactive factors are involved in the carcinogenesis of two of the most common types of NMSC, namely basal cell carcinoma (BCC) and squamous cell carcinoma (SCC), with the exception of penile SCC, for which a paucity of specific data on their pathogenic role exists. The complex interaction between the peripheral nervous system and target cells in the skin appears to be mediated by locally released neuroendocrine factors, such as catecholamines, substance P, calcitonin gene‑related peptide and somatostatin, as well as neurohormones, such as proopiomelanocortin and its derived peptides, α‑melanocyte‑stimulating hormone and adrenocorticotropin. All these factors have been, at least at some point, a subject of debate regarding their precise role in the pathogenesis of NMSC. There is also a significant body of evidence indicating that psychological stress is a crucial impact factor influencing the course of skin cancers, including SCC and BCC. Numerous studies have suggested that neuroendocrine factor dysregulation, as observed in stress reactions, may be involved in tumorigenesis, accelerating the development and progression, and suppressing the regression of NMSC. Further studies are required in order to elucidate the exact mechanisms through which neuroactive molecules promote or inhibit cutaneous carcinogenesis, as this could lead to the development of more sophisticated and tailored treatment protocols, as well as open new perspectives in skin cancer research.
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Affiliation(s)
- Mihai Lupu
- Department of Dermatology, MEDAS Medical Center, 030442 Bucharest, Romania
| | - Ana Caruntu
- Department of Oral and Maxillofacial Surgery, ‘Carol Davila’ Central Military Emergency Hospital, 010825 Bucharest, Romania
- ‘Titu Maiorescu’ University, Faculty of Medicine, 031593 Bucharest, Romania
| | - Constantin Caruntu
- Department of Physiology, ‘Carol Davila’ University of Medicine and Pharmacy, 050474 Bucharest, Romania
- Department of Dermatology, ‘Prof. N. Paulescu’ National Institute of Diabetes, Nutrition and Metabolic Diseases, 011233 Bucharest, Romania
| | | | - Mihaela Adriana Ilie
- Dermatology Research Laboratory, ‘Carol Davila’ University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Vlad Voiculescu
- Department of Dermatology and Allergology, Elias Emergency University Hospital, 011461 Bucharest, Romania
| | - Daniel Boda
- Dermatology Research Laboratory, ‘Carol Davila’ University of Medicine and Pharmacy, 050474 Bucharest, Romania
| | - Carolina Constantin
- ‘Victor Babes’ National Institute of Pathology, 050096 Bucharest, Romania
- Colentina University Hospital, 020125 Bucharest, Romania
| | - Cristiana Tanase
- ‘Titu Maiorescu’ University, Faculty of Medicine, 031593 Bucharest, Romania
- ‘Victor Babes’ National Institute of Pathology, 050096 Bucharest, Romania
| | - Maria Sifaki
- Laboratory of Toxicology, Faculty of Medicine, University of Crete, 71003 Heraklion, Greece
| | - Nikolaos Drakoulis
- Research Group of Clinical Pharmacology and Pharmacogenomics, Faculty of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Charalampos Mamoulakis
- Department of Urology, University General Hospital of Heraklion, University of Crete Medical School, 71003 Heraklion, Greece
| | - George Tzanakakis
- Laboratory of Anatomy-Histology-Embryology, School of Medicine, University of Crete, 71003 Heraklion, Greece
| | - Monica Neagu
- ‘Victor Babes’ National Institute of Pathology, 050096 Bucharest, Romania
- Colentina University Hospital, 020125 Bucharest, Romania
| | - Demetrios A. Spandidos
- Laboratory of Clinical Virology, Medical School, University of Crete, 71003 Heraklion, Greece
| | - Boris N. Izotov
- Department of Analytical Toxicology, Pharmaceutical Chemistry and Pharmacognosy, Sechenov University, 119991 Moscow, Russia
| | - Aristides M. Tsatsakis
- Laboratory of Toxicology, Faculty of Medicine, University of Crete, 71003 Heraklion, Greece
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25
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Antibacterial Properties of Visible-Light-Responsive Carbon-Containing Titanium Dioxide Photocatalytic Nanoparticles against Anthrax. NANOMATERIALS 2016; 6:nano6120237. [PMID: 28335365 PMCID: PMC5302719 DOI: 10.3390/nano6120237] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/28/2016] [Accepted: 12/06/2016] [Indexed: 01/12/2023]
Abstract
The bactericidal activity of conventional titanium dioxide (TiO2) photocatalyst is effective only on irradiation by ultraviolet light, which restricts the applications of TiO2 for use in living environments. Recently, carbon-containing TiO2 nanoparticles [TiO2(C) NP] were found to be a visible-light-responsive photocatalyst (VLRP), which displayed significantly enhanced antibacterial properties under visible light illumination. However, whether TiO2(C) NPs exert antibacterial properties against Bacillus anthracis remains elusive. Here, we evaluated these VLRP NPs in the reduction of anthrax-induced pathogenesis. Bacteria-killing experiments indicated that a significantly higher proportion (40%–60%) of all tested Bacillus species, including B. subtilis, B. cereus, B. thuringiensis, and B. anthracis, were considerably eliminated by TiO2(C) NPs. Toxin inactivation analysis further suggested that the TiO2(C) NPs efficiently detoxify approximately 90% of tested anthrax lethal toxin, a major virulence factor of anthrax. Notably, macrophage clearance experiments further suggested that, even under suboptimal conditions without considerable bacterial killing, the TiO2(C) NP-mediated photocatalysis still exhibited antibacterial properties through the reduction of bacterial resistance against macrophage killing. Our results collectively suggested that TiO2(C) NP is a conceptually feasible anti-anthrax material, and the relevant technologies described herein may be useful in the development of new strategies against anthrax.
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26
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Wataha JC, Lewis JB, Lockwood PE, Hsu S, Messer RL, Rueggeberg FA, Bouillaguet S. Blue Light Differentially Modulates Cell Survival and Growth. J Dent Res 2016; 83:104-8. [PMID: 14742645 DOI: 10.1177/154405910408300204] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Previous studies have reported that blue light (400–500 nm) inhibits cell mitochondrial activity. We investigated the hypothesis that cells with high energy consumption are most susceptible to blue-light-induced mitochondrial inhibition. We estimated cell energy consumption by population doubling time, and cell survival and growth by succinate dehydrogenase (SDH) activity. Six cell types were exposed to 5 or 60 J/cm2 of blue light from quartz-tungsten-halogen (QTH), plasma-arc (PAC), or argon laser sources in monolayer culture. Post-light SDH activity correlated positively with population doubling time (R2 = 0.91 for PAC, 0.76 for QTH, 0.68 for laser); SDH activity increased for cell types with the longest doubling times and was suppressed for cell types with shorter doubling times. Thus, light-induced exposure differentially affects SDH activity, cell survival, and growth, depending on cell energy consumption. Blue light may be useful as a therapeutic modulator of cell growth and survival.
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Affiliation(s)
- J C Wataha
- Department of Oral Rehabilitation, Medical College of Georgia School of Dentistry, Augusta, GA 30912-1260, USA.
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27
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Kleszczyński K, Zillikens D, Fischer TW. Melatonin enhances mitochondrial ATP synthesis, reduces reactive oxygen species formation, and mediates translocation of the nuclear erythroid 2-related factor 2 resulting in activation of phase-2 antioxidant enzymes (γ-GCS, HO-1, NQO1) in ultraviolet radiation-treated normal human epidermal keratinocytes (NHEK). J Pineal Res 2016; 61:187-97. [PMID: 27117941 DOI: 10.1111/jpi.12338] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 04/21/2016] [Indexed: 12/20/2022]
Abstract
Melatonin is an ubiquitous molecule with a variety of functions including potent antioxidative properties. Due to its lipophilic character, it easily crosses cellular and intracellular membranes and reaches all subcellular organelles. Because of its ability to scavenge free radicals, melatonin protects against oxidative stress, for example, induced by ultraviolet radiation (UVR). Here, we investigated, in a dose-dependent (0, 10, 25, and 50 mJ/cm(2) ) and time-dependent (0, 4, 24, 48 hr post-UVR) manner, whether melatonin prevents the UVR-mediated alterations in ATP synthesis and the generation of reactive oxygen species (ROS) in normal human epidermal keratinocytes (NHEK). Additionally, we evaluated the molecular mechanism of action of melatonin with regard to activation of phase-2 antioxidative enzymes via nuclear erythroid 2-related factor (Nrf2). We found that (i) melatonin counteracted UVR-induced alterations in the ATP synthesis and reduced free radical formation; (ii) melatonin induced the translocation of Nrf2 transcription factor from the cytosol into the nucleus resulting in, (iii) melatonin enhanced gene expression of phase-2 antioxidative enzymes including γ-glutamylcysteine synthetase (γ-GCS), heme oxygenase-1 (HO-1), and NADPH: quinone dehydrogenase-1 (NQO1) representing an elevated antioxidative response of keratinocytes. These results suggest that melatonin not only directly scavenges ROS, but also significantly induces the activation of phase-2 antioxidative enzymes via the Nrf2 pathway uncovering a new action mechanism that supports the ability of keratinocytes to protect themselves from UVR-mediated oxidative stress.
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Affiliation(s)
| | - Detlef Zillikens
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Tobias W Fischer
- Department of Dermatology, University of Lübeck, Lübeck, Germany
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28
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Zhou J, Ling J, Wang Y, Shang J, Ping F. Cross-talk between interferon-gamma and interleukin-18 in melanogenesis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 163:133-43. [PMID: 27567084 DOI: 10.1016/j.jphotobiol.2016.08.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 08/13/2016] [Accepted: 08/13/2016] [Indexed: 10/21/2022]
Abstract
Skin is the largest organ in our body and strategically placed to provide a metabolically active biological barrier against a range of noxious stressors. A lot of inflammatory cytokines, which are increased after ultraviolet (UV) irradiation produced by keratinocytes or other immunocytes, are closely related to pigmentary changes, including interleukin-18 (IL-18) and interferon-γ (IFN-γ). In this study, the effect of cross-talk between IL-18 and IFN-γ on melanogenesis was investigated. Treatment with IL-18 resulted in a dose-dependent increase of melanogenesis, while IFN-γ made an opposite effect. This influence of IL-18 and IFN-γ was mediated by regulations of microphthalmia-associated transcription factor (MITF) and its downstream enzymatic cascade expressions. Furthermore, IFN-γ inhibited basal and IL-18-induced melanogenesis. IFN-γ increased signal transducer and activator of transcription-1 (STAT-1) phosphorylation to play its position in regulating melanin pigmentation, and its inhibitory effect could be prevented by Janus Kinase 1 (JAK 1) inhibitor. IFN-γ could inhibit melanogenesis by decreasing melanocyte dendrite formation. In addition, IFN-γ inhibited the expressions of Rab Pases to suppress the mature and transport of melanosomes. IL-18 could rapidly induce Akt and PTEN phosphorylation and p65 expression in B16F10 cells. When treatment with IL-18 and IFN-γ together, the phosphorylation level of Protein Kinase B (Akt) and phosphatase and tensin homolog deleted on chromosome ten (PTEN) and expression of p65 NF-κB were inhibited, compared with treated with IL-18 only. Our studies indicated that IFN-γ could directly induce B16F10 cells apoptosis in vitro. Furthermore, we demonstrated that IFN-γ markedly up-regulated IL-18 binding protein (BP) production in normal human foreskin-derived epidermal keratinocytes in dose-dependent manner. UVB irradiation induced protease-activated receptor-2 (PAR-2) expression in NHEK, IFN-γ could inhibit this enhancement in a dose-dependent manner. These data suggest that IFN-γ plays a role in regulating inflammation- or UV-induced pigmentary changes, in direct/indirect manner.
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Affiliation(s)
- Jia Zhou
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, PR China; School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, PR China
| | - Jingjing Ling
- Wuxi People's Hospital affiliated to Nanjing Medical University, Wuxi 214023, PR China
| | - Yong Wang
- Wuxi People's Hospital affiliated to Nanjing Medical University, Wuxi 214023, PR China
| | - Jing Shang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China; Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, PR China
| | - Fengfeng Ping
- Wuxi People's Hospital affiliated to Nanjing Medical University, Wuxi 214023, PR China.
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29
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Yadav HM, Kolekar TV, Pawar SH, Kim JS. Enhanced photocatalytic inactivation of bacteria on Fe-containing TiO2 nanoparticles under fluorescent light. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:57. [PMID: 26787489 DOI: 10.1007/s10856-016-5675-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 01/12/2016] [Indexed: 05/26/2023]
Abstract
In this paper, the photocatalytic activity of Fe-TiO2 nanoparticles (NPs) under fluorescent light was studied using Escherichia coli and Staphylococcus aureus. Fe-TiO2 NPs were synthesized using a sol-gel method and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (UV-vis DRS) and transmission electron microscopy. The efficiency of photocatalytic inactivation towards E. coli was studied under different physicochemical parameters. The photocatalytic inactivation rate increased with increasing Fe content in TiO2 NPs and the highest inactivation was achieved for 3.0 mol% Fe-TiO2 NPs under fluorescent light. These results demonstrate that the presence of an optimum concentration of Fe in TiO2 matrix enhances the photocatalytic inactivation of TiO2 NPs under fluorescent light.
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Affiliation(s)
- Hemraj M Yadav
- Department of Materials Science and Engineering, University of Seoul, Seoul, 130743, South Korea.
| | - Tanaji V Kolekar
- Rajarambapu Institute of Technology, Islampur, Sangli, MS, 415414, India
| | - Shivaji H Pawar
- Center for Interdisciplinary Research, D.Y. Patil University, Kolhapur, MS, 416006, India
| | - Jung-Sik Kim
- Department of Materials Science and Engineering, University of Seoul, Seoul, 130743, South Korea.
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30
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Slominski AT, Manna PR, Tuckey RC. On the role of skin in the regulation of local and systemic steroidogenic activities. Steroids 2015; 103:72-88. [PMID: 25988614 PMCID: PMC4631694 DOI: 10.1016/j.steroids.2015.04.006] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 04/21/2015] [Accepted: 04/21/2015] [Indexed: 01/08/2023]
Abstract
The mammalian skin is a heterogeneous organ/tissue covering our body, showing regional variations and endowed with neuroendocrine activities. The latter is represented by its ability to produce and respond to neurotransmitters, neuropeptides, hormones and neurohormones, of which expression and phenotypic activities can be modified by ultraviolet radiation, chemical and physical factors, as well as by cytokines. The neuroendocrine contribution to the responses of skin to stress is served, in part, by local synthesis of all elements of the hypothalamo-pituitary-adrenal axis. Skin with subcutis can also be classified as a steroidogenic tissue because it expresses the enzyme, CYP11A1, which initiates steroid synthesis by converting cholesterol to pregnenolone, as in other steroidogenic tissues. Pregnenolone, or steroidal precursors from the circulation, are further transformed in the skin to corticosteroids or sex hormones. Furthermore, in the skin CYP11A1 acts on 7-dehydrocholesterol with production of 7-dehydropregnolone, which can be further metabolized to other Δ7steroids, which after exposure to UVB undergo photochemical transformation to vitamin D like compounds with a short side chain. Vitamin D and lumisterol, produced in the skin after exposure to UVB, are also metabolized by CYP11A1 to several hydroxyderivatives. Vitamin D hydroxyderivatives generated by action of CYP11A1 are biologically active and are subject to further hydroxylations by CYP27B1, CYP27A1 and CP24A. Establishment of which intermediates are produced in the epidermis in vivo and whether they circulate on the systemic level represent a future research challenge. In summary, skin is a neuroendocrine organ endowed with steroid/secosteroidogenic activities.
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Affiliation(s)
- Andrzej T Slominski
- Department of Dermatology, University of Alabama at Birmingham, VA Medical Center, Birmingham, AL, USA.
| | - Pulak R Manna
- Department of immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Robert C Tuckey
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, WA, Australia
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Slominski AT. Ultraviolet radiation (UVR) activates central neuro-endocrine-immune system. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2015; 31:121-3. [PMID: 25660238 DOI: 10.1111/phpp.12165] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/28/2015] [Indexed: 02/06/2023]
Affiliation(s)
- Andrzej T Slominski
- Department of Pathology and Laboratory Medicine, University of Tennessee, Memphis, TN, USA; Department of Dermatology, University of Alabama Birmingham, Birmingham, AL, USA
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Schmitz MK, Botte DA, Sotto MN, Borba EF, Bonfa E, de Mello SBV. Increased corticotropin-releasing hormone (CRH) expression in cutaneous lupus lesions. Lupus 2015; 24:854-61. [DOI: 10.1177/0961203315569335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 12/18/2014] [Indexed: 01/09/2023]
Abstract
Objective Corticotropin-releasing hormone (CRH) and pro-opiomelanocortin (POMC) axis activation leads to the production of hormones, such as adrenocorticotrophic hormone (ACTH) and the α-melanocyte stimulating hormone (α-MSH). Data regarding the role of these hormones in systemic lupus erythematosus (SLE) are scarce. In the present study we aim to evaluate the participation of this axis in the cutaneous involvement of SLE. Methods Seventeen SLE patients were clinically evaluated, and biopsies from affected and unaffected skin of these patients were compared with 17 healthy control individuals. Immunohistochemical analyses for CRH, ACTH, α-MSH, and MC-1R were performed, and the serum levels of α-MSH, IL-1, IL-1ra, IL-6, IL-10, IL-12p70, IL-17, TNF-α, and IFN-γ were measured. Results The affected skin of the SLE patients exhibited higher CRH expression in the deep dermis compared to the skin of the controls ( p = 0.024), whereas the tissue expression of ACTH, cortisol, α-MSH and its receptor MC-1R were comparable in SLE patients and controls. Higher serum levels of IFN-γ ( p = 0.041), TNF-α ( p = 0.001) and IL-6 ( p = 0.049) were observed in SLE patients compared with controls, while α-MSH levels were similar in both groups. Conclusion The novel finding of elevated CRH expression solely in the affected skin deep dermis supports the notion of a cutaneous local dysfunction of the CRH-POMC axis in the pathogenesis of cutaneous SLE lesions.
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Affiliation(s)
- M K Schmitz
- Department of Internal Medicine, Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - D A Botte
- Department of Internal Medicine, Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - M N Sotto
- Department of Dermatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - E F Borba
- Department of Internal Medicine, Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - E Bonfa
- Department of Internal Medicine, Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - S B V de Mello
- Department of Internal Medicine, Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
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Yamate Y, Hiramoto K, Kasahara E, Sato EF. UVA irradiation of the eye modulates the contact hypersensitivity of the skin and intestines by affecting mast cells in mice. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2015; 31:129-40. [PMID: 25495784 DOI: 10.1111/phpp.12157] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/07/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND Ultraviolet A (UVA) irradiation before allergic sensitization induces immunosuppression, but the precise mechanism remained unclear. In this study, we examined the influence of UVA irradiation of the eye on contact hypersensitivity (CHS) and the role of mast cells in CHS. METHODS We used two types of haptens, fluorescein isothiocyanate (FITC: a Th2 type hapten) and 4-ethoxymethylene-2-phenyl-2-oxazolin-5-one (oxazolone: a Th1 type hapten). A 300 kJ/m(2) dose of UVA irradiation was delivered to the eyes. After UVA irradiation, we sensitized abdominal shaved skin and challenged the ear epidermis and colons of these mice with each hapten. RESULTS After UVA irradiation, the CHS of the skin and colon were not inhibited in the FITC-sensitized mice. However, in the oxazolone-sensitized mice, only the CHS of the skin was inhibited by UVA irradiation. The inflammation of the colon became more severe after UVA irradiation. In mast cell-deficient (W/Wv) mice sensitized to FITC, the CHS was weaker than that in WT mice. Moreover, the reduction of immunosuppression in ear swelling was seen for one of the two models they used. CONCLUSIONS These results suggest that the mast cells induced by UVA irradiation of the eye have different roles in the epidermis and colon and have different responses to different haptens.
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Affiliation(s)
- Yurika Yamate
- Department of Physiology, Osaka City University Graduate School of Medicine, Osaka, Japan; Department of Pharmaceutical Science, Suzuka University of Medical Science, Mie, Japan
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Skobowiat C, Slominski AT. UVB Activates Hypothalamic-Pituitary-Adrenal Axis in C57BL/6 Mice. J Invest Dermatol 2014; 135:1638-1648. [PMID: 25317845 PMCID: PMC4398592 DOI: 10.1038/jid.2014.450] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 09/04/2014] [Accepted: 09/25/2014] [Indexed: 12/12/2022]
Abstract
To test the hypothesis that ultraviolet B (UVB) can activate the hypothalamic-pituitary-adrenal (HPA) axis, the shaved back skin of C57BL/6 mice was exposed to 400 mJ/cm2 of UVB or was shame irradiated. After 12 and 24 h of exposure, plasma, skin, brain, and adrenals were collected and processed to measure corticotropin-releasing hormone (CRH), urocortin (Ucn), β-endorphin (β-END), ACTH and corticosterone (CORT) or brain was fixed for immunohistochemical detection of CRH. UVB stimulated plasma levels of CRH, Ucn, β-END, ACTH and CORT, and increased skin expression of Ucn, β-END and CORT at the gene and protein/peptide levels. UVB stimulated CRH gene and protein expression in the brain that was localized to the paraventricular nucleus of the hypothalamus. In adrenal glands it increased mRNAs of melanocortin receptor type 2, StAR and CYP11B1. Hypophysectomy abolished UVB stimulation of plasma but not of skin CORT levels, and had no effect on UVB stimulation of CRH and Ucn levels in the plasma, demonstrating the requirement of an intact pituitary for the systemic effect. In conclusion, we identify mechanism of the regulation of body homeostasis by UVB through activation of the HPA axis that originates in the skin and requires pituitary for the systemic effect.
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Affiliation(s)
- Cezary Skobowiat
- Department of Pathology and Laboratory Medicine, Center for Cancer Research, University of Tennessee Health Science Center (UTHSC), Memphis, Tennessee, USA
| | - Andrzej T Slominski
- Department of Pathology and Laboratory Medicine, Center for Cancer Research, University of Tennessee Health Science Center (UTHSC), Memphis, Tennessee, USA; Division of Rheumatology, Department of Medicine, University of Tennessee Health Science Center (UTHSC), Memphis, Tennessee, USA.
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Grichnik JM, Ross AL, Schneider SL, Sanchez MI, Eller MS, Hatzistergos KE. How, and from which cell sources, do nevi really develop? Exp Dermatol 2014; 23:310-3. [DOI: 10.1111/exd.12363] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2014] [Indexed: 12/16/2022]
Affiliation(s)
- James M. Grichnik
- Department of Dermatology and Cutaneous Surgery; University of Miami; Miller School of Medicine; Miami FL USA
- Sylvester Comprehensive Cancer Center; University of Miami; Miller School of Medicine; Miami FL USA
- Interdisciplinary Stem Cell Institute; University of Miami Miller School of Medicine; Miami FL USA
| | - Andrew L. Ross
- Department of Dermatology and Cutaneous Surgery; University of Miami; Miller School of Medicine; Miami FL USA
| | - Samantha L. Schneider
- Department of Dermatology and Cutaneous Surgery; University of Miami; Miller School of Medicine; Miami FL USA
| | - Margaret I. Sanchez
- Department of Dermatology and Cutaneous Surgery; University of Miami; Miller School of Medicine; Miami FL USA
- Sylvester Comprehensive Cancer Center; University of Miami; Miller School of Medicine; Miami FL USA
| | - Mark S. Eller
- Sylvester Comprehensive Cancer Center; University of Miami; Miller School of Medicine; Miami FL USA
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Randhawa M, Sangar V, Tucker-Samaras S, Southall M. Metabolic signature of sun exposed skin suggests catabolic pathway overweighs anabolic pathway. PLoS One 2014; 9:e90367. [PMID: 24603693 PMCID: PMC3946127 DOI: 10.1371/journal.pone.0090367] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 01/31/2014] [Indexed: 11/18/2022] Open
Abstract
Skin chronically exposed to sun results in phenotypic changes referred as photoaging. This aspect of aging has been studied extensively through genomic and proteomic tools. Metabolites, the end product are generated as a result of biochemical reactions are often studied as a culmination of complex interplay of gene and protein expression. In this study, we focused exclusively on the metabolome to study effects from sun-exposed and sun-protected skin sites from 25 human subjects. We generated a highly accurate metabolomic signature for the skin that is exposed to sun. Biochemical pathway analysis from this data set showed that sun-exposed skin resides under high oxidative stress and the chains of reactions to produce these metabolites are inclined toward catabolism rather than anabolism. These catabolic activities persuade the skin cells to generate metabolites through the salvage pathway instead of de novo synthesis pathways. Metabolomic profile suggests catabolic pathways and reactive oxygen species operate in a feed forward fashion to alter the biology of sun exposed skin.
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Affiliation(s)
- Manpreet Randhawa
- Johnson & Johnson Skin Research Center, CPPW, a Division of Johnson & Johnson Consumer Companies, Inc., Skillman, New Jersey, United States of America
- * E-mail:
| | - Vineet Sangar
- Institute for Systems Biology, Seattle, Washington, United States of America
| | - Samantha Tucker-Samaras
- Johnson & Johnson Skin Research Center, CPPW, a Division of Johnson & Johnson Consumer Companies, Inc., Skillman, New Jersey, United States of America
| | - Michael Southall
- Johnson & Johnson Skin Research Center, CPPW, a Division of Johnson & Johnson Consumer Companies, Inc., Skillman, New Jersey, United States of America
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Caballero L, Whitehead K, Allen N, Verran J. Photocatalytic inactivation of Escherichia coli using doped titanium dioxide under fluorescent irradiation. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2013.11.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Jiang H, Wortsman J, Matsuoka L, Granese J, Carlson JA, Mihm M, Slominski A. Molecular spectrum of pigmented skin lesions: from nevus to melanoma. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/17469872.1.5.679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Slominski AT, Zmijewski MA, Zbytek B, Tobin DJ, Theoharides TC, Rivier J. Key role of CRF in the skin stress response system. Endocr Rev 2013; 34:827-84. [PMID: 23939821 PMCID: PMC3857130 DOI: 10.1210/er.2012-1092] [Citation(s) in RCA: 282] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 08/02/2013] [Indexed: 02/08/2023]
Abstract
The discovery of corticotropin-releasing factor (CRF) or CRH defining the upper regulatory arm of the hypothalamic-pituitary-adrenal (HPA) axis, along with the identification of the corresponding receptors (CRFRs 1 and 2), represents a milestone in our understanding of central mechanisms regulating body and local homeostasis. We focused on the CRF-led signaling systems in the skin and offer a model for regulation of peripheral homeostasis based on the interaction of CRF and the structurally related urocortins with corresponding receptors and the resulting direct or indirect phenotypic effects that include regulation of epidermal barrier function, skin immune, pigmentary, adnexal, and dermal functions necessary to maintain local and systemic homeostasis. The regulatory modes of action include the classical CRF-led cutaneous equivalent of the central HPA axis, the expression and function of CRF and related peptides, and the stimulation of pro-opiomelanocortin peptides or cytokines. The key regulatory role is assigned to the CRFR-1α receptor, with other isoforms having modulatory effects. CRF can be released from sensory nerves and immune cells in response to emotional and environmental stressors. The expression sequence of peptides includes urocortin/CRF→pro-opiomelanocortin→ACTH, MSH, and β-endorphin. Expression of these peptides and of CRFR-1α is environmentally regulated, and their dysfunction can lead to skin and systemic diseases. Environmentally stressed skin can activate both the central and local HPA axis through either sensory nerves or humoral factors to turn on homeostatic responses counteracting cutaneous and systemic environmental damage. CRF and CRFR-1 may constitute novel targets through the use of specific agonists or antagonists, especially for therapy of skin diseases that worsen with stress, such as atopic dermatitis and psoriasis.
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Affiliation(s)
- Andrzej T Slominski
- MD, PhD, Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center; 930 Madison Avenue, Suite 500, Memphis, Tennessee 38163.
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Kim HJ, Son ED, Jung JY, Choi H, Lee TR, Shin DW. Violet light down-regulates the expression of specific differentiation markers through Rhodopsin in normal human epidermal keratinocytes. PLoS One 2013; 8:e73678. [PMID: 24069221 PMCID: PMC3775733 DOI: 10.1371/journal.pone.0073678] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/19/2013] [Indexed: 01/09/2023] Open
Abstract
Several recent reports have demonstrated that photoreceptors are expressed in human skin. The rod and cone photoreceptor-like proteins are expressed in human skin and rhodopsin, long wavelength-opsin, and short wavelength-opsin are also present in cultured murine melanocytes. Furthermore, the photopigment rhodopsin is expressed in human melanocytes and is involved in ultraviolet A phototransduction which induces early melanin synthesis. In this study, we investigated whether rhodopsin is expressed and plays any physiological roles in the normal human epidermal keratinocytes (NHEKs). We found that rhodopsin was expressed and localized on the plasma membrane in NHEKs, and only violet light among several wavelengths within the visible range significantly increased the expression of rhodopsin mRNA. We further found that rhodopsin over-expression decreased the mRNA expression levels of keratinocyte differentiation markers, such as keratin-1 and keratin-10, and violet light also decreased the mRNA expression levels of keratinocyte differentiation markers and these decreased expression levels were recovered by a rhodopsin-directed siRNA. Moreover, we further demonstrated that violet light significantly decreased the phosphorylation levels of cAMP responsive element-binding protein (CREB) and that it more effectively decreased the phosphorylation of CREB when rhodopsin was over-expressed. In addition, we observed that pertussis toxin, a Gαi protein inhibitor, restored the rhodopsin-induced decrease in the differentiation markers in NHEKs. Taken together, these results suggest that rhodopsin down-regulates the expression levels of specific keratinocyte differentiation markers via the Gαi signaling pathway in NHEKs.
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Affiliation(s)
- Hyoung-June Kim
- Bioscience Research Institute, Amorepacific Corporation R&D Center, Yongin-city, Gyeonggi-do, Republic of Korea
- Department of Biological Sciences, Sungkyunkwan University, Suwon-city, Republic of Korea
| | - Eui Dong Son
- Bioscience Research Institute, Amorepacific Corporation R&D Center, Yongin-city, Gyeonggi-do, Republic of Korea
| | - Ji-Yong Jung
- Bioscience Research Institute, Amorepacific Corporation R&D Center, Yongin-city, Gyeonggi-do, Republic of Korea
| | - Hyun Choi
- Bioscience Research Institute, Amorepacific Corporation R&D Center, Yongin-city, Gyeonggi-do, Republic of Korea
| | - Tae Ryong Lee
- Bioscience Research Institute, Amorepacific Corporation R&D Center, Yongin-city, Gyeonggi-do, Republic of Korea
- * E-mail: (DWS); (TRL)
| | - Dong Wook Shin
- Bioscience Research Institute, Amorepacific Corporation R&D Center, Yongin-city, Gyeonggi-do, Republic of Korea
- * E-mail: (DWS); (TRL)
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Iyengar B. The melanocyte photosensory system in the human skin. SPRINGERPLUS 2013; 2:158. [PMID: 23807911 PMCID: PMC3685707 DOI: 10.1186/2193-1801-2-158] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 03/21/2013] [Indexed: 11/18/2022]
Abstract
The pigment cells form the largest population of neural crest cells to migrate into the epidermis and hair follicle along each dermatomic area from the neural folds. The melanopsin system responsible for photoentrainment, was isolated from the photosensitive dermal melanophores of frogs Xenopus laevis responding to light. Melanocytes form a photoresponsive network which reads the environmental seasonal variations in the light cycles in the same manner. The present work was undertaken to study the organization of this system by: I. Experimental assessment of photoresponse and II. Evidence of an organized system of photoreception in the skin. Melanocytes, in whole skin organ cultures and epidermal strips, from margin of vitiligo in G2 phase show prominent dendricity, and express pigment, biogenic amines and hormones on UV exposure. The photoresponse depends on the photosensitive enzymes NAT/HIOMT and dopaoxidase. Melanocytes interact with adjacent keratinocytes, dermal capillaries, and nerve endings. The melanocyte network reads the diurnal and seasonal photophase by the melatonin/serotonin switch like the pineal. Sleep disorders and winter depression are corrected by phototherapy utilising this mechanism. Melanocytes showing photoactivity, aplasia, hypoplasia and hyperplasia, and interactive keratinocytes occupy the trigeminal, brachial and lumbosacral dermatomes, zones of high embryonic induction, forming an ectodermal placodal system. Melanin units and hair follicles serve as photoreceptors. Migration of active melanocytes to defined areas is evident in pigment patterns in guinea pigs. This study identifies defined photoreceptor melanocyte/epidermal domains which read the seasonal photophase and control the sleep waking cycle in response to the environmental light. I. Whole skin organ cultures, and epidermal strips from margin of vitiligo in G2 phase are exposed to UV and IR to study sequential and dose response of marginal melanocytes, using histochemistry, immunohistochemistry to assess pigment, biogenic amines and hormones on UV exposure. II. Dermatomic Distributions: Detailed maps of melanocyte photoresponse in 356 biopsies, lesions in 297 vitiligo, 100 melanosis, 165 melanomas 142 leprosy and 442 basal cell/keratinocytes lesions were assessed for patterns of dermatomic distribution. Embryonal melanocyte migration along dermatomes was assessed in 285 guinea pigs from an inbred colony having black, brown and white patches.
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Affiliation(s)
- Bhanu Iyengar
- Pigment Cell Centre, Iyengar Farm, Brijwasan Road, PO Kapshera, New Delhi, 110037 India
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Fischer TW, Kleszczyński K, Hardkop LH, Kruse N, Zillikens D. Melatonin enhances antioxidative enzyme gene expression (CAT, GPx, SOD), prevents their UVR-induced depletion, and protects against the formation of DNA damage (8-hydroxy-2'-deoxyguanosine) in ex vivo human skin. J Pineal Res 2013; 54:303-12. [PMID: 23110400 DOI: 10.1111/jpi.12018] [Citation(s) in RCA: 232] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 09/21/2012] [Indexed: 12/16/2022]
Abstract
UV radiation (UVR) induces serious structural and functional alterations in human skin leading to skin aging and carcinogenesis. Reactive oxygen species are key players in UVR-mediated photodamage and induce the DNA-base-oxidized, intermediate 8-hydroxy-2'-deoxyguanosine (8-OHdG). Herein, we report the protective action of melatonin against UVR-induced 8-OHdG formation and depletion of antioxidative enzymes using ex vivo human full-thickness skin exposed to UVR in a dose (0, 100, 300 mJ/cm(2))- and time-dependent manner (0, 24, 48 hr post-UVR). Dynamics of depletion of antioxidative enzymes including catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD), or 8-OHdG formation were studied by real-time PCR and immunofluorescence/immunohistochemical staining. UVR-treated skin revealed significant and immediate (0 hr 300 mJ/cm(2)) reduction of gene expression, and this effect intensified within 24 hr post-UVR. Simultaneous increase in 8-OHdG-positive keratinocytes occurred already after 0 hr post-UVR reaching 71% and 99% up-regulation at 100 and 300 mJ/cm(2), respectively (P < 0.001). Preincubation with melatonin (10(-3) M) led to 32% and 29% significant reductions in 8-OHdG-positive cells and the prevention of antioxidative enzyme gene and protein suppression. Thus, melatonin was shown to play a crucial role as a potent antioxidant and DNA protectant against UVR-induced oxidative damage in human skin.
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Affiliation(s)
- Tobias W Fischer
- Department of Dermatology, Allergology and Venerology, University of Lübeck, Lübeck, Germany.
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Budden T, Bowden NA. The role of altered nucleotide excision repair and UVB-induced DNA damage in melanomagenesis. Int J Mol Sci 2013; 14:1132-51. [PMID: 23303275 PMCID: PMC3565312 DOI: 10.3390/ijms14011132] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 11/29/2012] [Accepted: 12/26/2012] [Indexed: 01/12/2023] Open
Abstract
UVB radiation is the most mutagenic component of the UV spectrum that reaches the earth's surface and causes the development of DNA damage in the form of cyclobutane pyrimidine dimers and 6-4 photoproducts. UV radiation usually results in cellular death, but if left unchecked, it can affect DNA integrity, cell and tissue homeostasis and cause mutations in oncogenes and tumour-suppressor genes. These mutations, if unrepaired, can lead to abnormal cell growth, increasing the risk of cancer development. Epidemiological data strongly associates UV exposure as a major factor in melanoma development, but the exact biological mechanisms involved in this process are yet to be fully elucidated. The nucleotide excision repair (NER) pathway is responsible for the repair of UV-induced lesions. Patients with the genetic disorder Xeroderma Pigmentosum have a mutation in one of eight NER genes associated with the XP complementation groups XP-A to XP-G and XP variant (XP-V). XP is characterized by diminished repair capacity, as well as a 1000-fold increase in the incidence of skin cancers, including melanoma. This has suggested a significant role for NER in melanoma development as a result of UVB exposure. This review discusses the current research surrounding UVB radiation and NER capacity and how further investigation of NER could elucidate the role of NER in avoiding UV-induced cellular death resulting in melanomagenesis.
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Affiliation(s)
- Timothy Budden
- Centre for Information Based Medicine, Hunter Medical Research Institute, and School of Biomedical Sciences & Pharmacy, Faculty of Health, University of Newcastle, Newcastle, NSW 2289, Australia.
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Slominski AT, Zmijewski MA, Skobowiat C, Zbytek B, Slominski RM, Steketee JD. Sensing the environment: regulation of local and global homeostasis by the skin's neuroendocrine system. ADVANCES IN ANATOMY EMBRYOLOGY AND CELL BIOLOGY 2012; 212:v, vii, 1-115. [PMID: 22894052 DOI: 10.1007/978-3-642-19683-6_1] [Citation(s) in RCA: 407] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Skin, the body's largest organ, is strategically located at the interface with the external environment where it detects, integrates, and responds to a diverse range of stressors including solar radiation. It has already been established that the skin is an important peripheral neuro-endocrine-immune organ that is tightly networked to central regulatory systems. These capabilities contribute to the maintenance of peripheral homeostasis. Specifically, epidermal and dermal cells produce and respond to classical stress neurotransmitters, neuropeptides, and hormones. Such production is stimulated by ultraviolet radiation (UVR), biological factors (infectious and noninfectious), and other physical and chemical agents. Examples of local biologically active products are cytokines, biogenic amines (catecholamines, histamine, serotonin, and N-acetyl-serotonin), melatonin, acetylocholine, neuropeptides including pituitary (proopiomelanocortin-derived ACTH, beta-endorphin or MSH peptides, thyroid-stimulating hormone) and hypothalamic (corticotropin-releasing factor and related urocortins, thyroid-releasing hormone) hormones as well as enkephalins and dynorphins, thyroid hormones, steroids (glucocorticoids, mineralocorticoids, sex hormones, 7-delta steroids), secosteroids, opioids, and endocannabinoids. The production of these molecules is hierarchical, organized along the algorithms of classical neuroendocrine axes such as hypothalamic-pituitary-adrenal axis (HPA), hypothalamic-thyroid axis (HPT), serotoninergic, melatoninergic, catecholaminergic, cholinergic, steroid/secosteroidogenic, opioid, and endocannbinoid systems. Dysregulation of these axes or of communication between them may lead to skin and/ or systemic diseases. These local neuroendocrine networks are also addressed at restricting maximally the effect of noxious environmental agents to preserve local and consequently global homeostasis. Moreover, the skin-derived factors/systems can also activate cutaneous nerve endings to alert the brain on changes in the epidermal or dermal environments, or alternatively to activate other coordinating centers by direct (spinal cord) neurotransmission without brain involvement. Furthermore, rapid and reciprocal communications between epidermal and dermal and adnexal compartments are also mediated by neurotransmission including antidromic modes of conduction. In conclusion, skin cells and skin as an organ coordinate and/or regulate not only peripheral but also global homeostasis.
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Affiliation(s)
- Andrzej T Slominski
- University of Tennessee Health Science Center, Department of Pathology and Laboratory Medicine, Memphhis, TN, USA.
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Visible light–responsive core-shell structured In2O3@CaIn2O4 photocatalyst with superior bactericidal properties and biocompatibility. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2012; 8:609-17. [DOI: 10.1016/j.nano.2011.09.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 09/12/2011] [Accepted: 09/25/2011] [Indexed: 11/18/2022]
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Lin HY, Lin HM. Visible-light photocatalytic inactivation of Escherichia coli by K4Nb6O17 and Ag/Cu modified K4Nb6O17. JOURNAL OF HAZARDOUS MATERIALS 2012; 217-218:231-237. [PMID: 22480703 DOI: 10.1016/j.jhazmat.2012.03.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 02/20/2012] [Accepted: 03/06/2012] [Indexed: 05/31/2023]
Abstract
Ag/Cu modified K(4)Nb(6)O(17) thin film, a novel type of photocatalyst for photocatalytic inactivation of Escherichia coli under visible light irradiation was developed. The effects of loading method of Cu species on the characteristics of Ag-Cu nanocomposites and photocatalytic antibacterial activity were studied. Samples were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible spectroscopy (UV-Vis). Irrespective of the preparation method, loading Ag, Cu and Ag-Cu composite as cocatalyst led to an increase in antibacterial activity as compared to bare K(4)Nb(6)O(17). In comparison with conventional impregnation method, well dispersed Ag-Cu nanocomposites were obtained on the K(4)Nb(6)O(17) surface by a sodium borohydride reduction method in the presence PVP. In this case, markedly improvement of photocatalytic activity was observed. The significant enhancement was ascribed to the high efficiency of electron hole pair separation related to the Ag-Cu nanocomposite on K(4)Nb(6)O(17) surface and the synergistic effects of coexisting Ag and Cu ions on antibacterial activity.
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Affiliation(s)
- Hsin-yu Lin
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 974, Taiwan.
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Fernandez TL, Dawson RA, Van Lonkhuyzen DR, Kimlin MG, Upton Z. A tan in a test tube -in vitro models for investigating ultraviolet radiation-induced damage in skin. Exp Dermatol 2012; 21:404-10. [DOI: 10.1111/j.1600-0625.2012.01485.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Chen YL, Chen YS, Chan H, Tseng YH, Yang SR, Tsai HY, Liu HY, Sun DS, Chang HH. The use of nanoscale visible light-responsive photocatalyst TiO2-Pt for the elimination of soil-borne pathogens. PLoS One 2012; 7:e31212. [PMID: 22384003 PMCID: PMC3285157 DOI: 10.1371/journal.pone.0031212] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 01/04/2012] [Indexed: 12/02/2022] Open
Abstract
Exposure to the soil-borne pathogens Burkholderia pseudomallei and Burkholderia cenocepacia can lead to severe infections and even mortality. These pathogens exhibit a high resistance to antibiotic treatments. In addition, no licensed vaccine is currently available. A nanoscale platinum-containing titania photocatalyst (TiO2-Pt) has been shown to have a superior visible light-responsive photocatalytic ability to degrade chemical contaminants like nitrogen oxides. The antibacterial activity of the catalyst and its potential use in soil pathogen control were evaluated. Using the plating method, we found that TiO2-Pt exerts superior antibacterial performance against Escherichia coli compared to other commercially available and laboratory prepared ultraviolet/visible light-responsive titania photocatalysts. TiO2-Pt-mediated photocatalysis also affectively eliminates the soil-borne bacteria B. pseudomallei and B. cenocepacia. An air pouch infection mouse model further revealed that TiO2-Pt-mediated photocatalysis could reduce the pathogenicity of both strains of bacteria. Unexpectedly, water containing up to 10% w/v dissolved soil particles did not reduce the antibacterial potency of TiO2-Pt, suggesting that the TiO2-Pt photocatalyst is suitable for use in soil-contaminated environments. The TiO2-Pt photocatalyst exerted superior antibacterial activity against a broad spectrum of human pathogens, including B. pseudomallei and B. cenocepacia. Soil particles (<10% w/v) did not significantly reduce the antibacterial activity of TiO2-Pt in water. These findings suggest that the TiO2-Pt photocatalyst may have potential applications in the development of bactericides for soil-borne pathogens.
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Affiliation(s)
- Ya-Lei Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Yao-Shen Chen
- Division of Infectious Diseases, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- Department of Internal Medicine, National Yung-Ming University, Taipei, Taiwan
| | - Hao Chan
- Graduate Institute of Medical Science, Tzu-Chi University, Hualien, Taiwan
| | - Yao-Hsuan Tseng
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Shu-Ru Yang
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Hsin-Ying Tsai
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Hong-Yi Liu
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Der-Shan Sun
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
| | - Hsin-Hou Chang
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien, Taiwan
- * E-mail:
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López-Camarillo C, Ocampo EA, Casamichana ML, Pérez-Plasencia C, Álvarez-Sánchez E, Marchat LA. Protein kinases and transcription factors activation in response to UV-radiation of skin: implications for carcinogenesis. Int J Mol Sci 2011; 13:142-72. [PMID: 22312244 PMCID: PMC3269678 DOI: 10.3390/ijms13010142] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Revised: 12/14/2011] [Accepted: 12/16/2011] [Indexed: 12/18/2022] Open
Abstract
Solar ultraviolet (UV) radiation is an important environmental factor that leads to immune suppression, inflammation, photoaging, and skin carcinogenesis. Here, we reviewed the specific signal transduction pathways and transcription factors involved in the cellular response to UV-irradiation. Increasing experimental data supporting a role for p38, MAPK, JNK, ERK1/2, and ATM kinases in the response network to UV exposure is discussed. We also reviewed the participation of NF-κB, AP-1, and NRF2 transcription factors in the control of gene expression after UV-irradiation. In addition, we discussed the promising chemotherapeutic intervention of transcription factors signaling by natural compounds. Finally, we focused on the review of data emerging from the use of DNA microarray technology to determine changes in global gene expression in keratinocytes and melanocytes in response to UV treatment. Efforts to obtain a comprehensive portrait of the transcriptional events regulating photodamage of intact human epidermis after UV exposure reveals the existence of novel factors participating in UV-induced cell death. Progress in understanding the multitude of mechanisms induced by UV-irradiation could lead to the potential use of protein kinases and novel proteins as specific targets for the prevention and control of skin cancer.
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Affiliation(s)
- César López-Camarillo
- Genomics Sciences Program, Oncogenomics and Cancer Proteomics Laboratory, University Autonomous of Mexico City, Av. San Lorenzo 290, 03100, Mexico; E-Mails: (M.L.-C.); (E.Á.-S.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-5488-6661 ext. 15307
| | - Elena Aréchaga Ocampo
- Carcinogenesis Laboratory, National Institute of Cancerology, Av. Saint Fernando 22, 14080, México; E-Mail:
| | - Mavil López Casamichana
- Genomics Sciences Program, Oncogenomics and Cancer Proteomics Laboratory, University Autonomous of Mexico City, Av. San Lorenzo 290, 03100, Mexico; E-Mails: (M.L.-C.); (E.Á.-S.)
| | - Carlos Pérez-Plasencia
- Massive Sequencing Unit, National Institute of Cancerology, Av. Saint Fernando 22, 14080, México; E-Mail:
- Genomics Laboratory, FES-I, UBIMED, National Autonomous University of Mexico, Av. De los Barrios 1, 54090, México
| | - Elizbeth Álvarez-Sánchez
- Genomics Sciences Program, Oncogenomics and Cancer Proteomics Laboratory, University Autonomous of Mexico City, Av. San Lorenzo 290, 03100, Mexico; E-Mails: (M.L.-C.); (E.Á.-S.)
| | - Laurence A. Marchat
- Biotechnology Program, Institutional Program of Molecular Biomedicine, National School of Medicine and Homeopathy of the National Polytechnic Institute, Guillermo Massieu Helguera 239, 07320, Mexico; E-Mail:
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Skobowiat C, Dowdy JC, Sayre RM, Tuckey RC, Slominski A. Cutaneous hypothalamic-pituitary-adrenal axis homolog: regulation by ultraviolet radiation. Am J Physiol Endocrinol Metab 2011; 301:E484-93. [PMID: 21673307 PMCID: PMC3174533 DOI: 10.1152/ajpendo.00217.2011] [Citation(s) in RCA: 161] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The hypothalamic-pituitary-adrenal (HPA) axis maintains basal and stress-related homeostasis in vertebrates. Skin expresses all elements of the HPA axis including corticotropin-releasing hormone (CRH), proopiomelanocortin (POMC), ACTH, β-endorphin (β-END) with corresponding receptors, the glucocorticoidogenic pathway, and the glucocorticoid receptor (GR). To test the hypothesis that cutaneous responses to environmental stressors follow the organizational structure of the central response to stress, the activity of the "cutaneous HPA" axis homolog was investigated after exposure to ultraviolet radiation (UVR) wavelengths of UVA (320-400 nm), UVB (280-320 nm), and UVC (100-280 nm) in human skin organ culture and in co-cultured keratinocytes/melanocytes. The level of stimulation of CRH, POMC, MC1R, MC2R, CYP11A1, and CYP11B1 genes was dependent on UV wavelengths and doses, with the highest effects observed for highly energetic UVC and UVB. ELISA and Western assays showed significant production of CRH, POMC, ACTH, and CYP11A1 proteins and of cortisol, with a decrease in GR expression only after UVB and UVC. However, β-END expression was also stimulated by UVA. Immunocytochemistry localized the deposition of the aforesaid antigens predominantly to the epidermis with additional accumulation of CRH, β-END, and ACTH in the dermis. UVR-stimulated CYP11A1 expression was seen in the basal layer of the epidermis and cells of adjacent dermis. Thus, the capacity to activate or change the spatial distribution of the cutaneous HPA axis elements is dependent on highly energetic wavelengths (UVC and UVB), implying a dependence of a local stress response on their noxious activity with overlapping or alternative mechanisms activated by UVA.
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Affiliation(s)
- Cezary Skobowiat
- Dept. of Pathology and Laboratory Medicine, Univ. of Tennessee Health Science Center, Memphis, TN 38163, USA
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