1
|
Christian L, Manjrekar P, Henkels KM, Rapp CM, Annamraju R, Lohade RP, Singh S, Carpenter MA, Khan S, Kemp MG, Chen Y, Sahu RP, Travers JB. Evidence for the involvement of keratinocyte-derived microvesicle particles in the photosensitivity associated with xeroderma pigmentosum type A deficiency. Photochem Photobiol 2024:10.1111/php.13915. [PMID: 38287748 PMCID: PMC11284252 DOI: 10.1111/php.13915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/16/2024] [Accepted: 01/16/2024] [Indexed: 01/31/2024]
Abstract
Photosensitivity can be due to numerous causes. The photosensitivity associated with deficiency of xeroderma pigmentosum type A (XPA) has been previously shown to be associated with excess levels of the lipid mediator platelet-activating factor (PAF) generated by the keratinocyte. As PAF has been reported to trigger the production of subcellular microvesicle particles (MVP) due to the enzyme acid sphingomyelinase (aSMase), the goal of these studies was to discern if PAF and aSMase could serve as therapeutic targets for the XPA deficiency photosensitivity. HaCaT keratinocytes lacking XPA generated greater levels of MVP in comparison to control cells. Mice deficient in XPA also generated enhanced MVP levels in skin and in plasma in response to UV radiation. Use of a genetic strategy with mice deficient in both XPA and PAF receptors revealed that these mice generated less MVP release as well as decreased skin erythema and cytokine release compared to XPA knockout mice alone. Finally, the aSMase inhibitor imipramine blocked UV-induced MVP release in HaCaT keratinocytes, as well as XPA knockout mice. These studies support the concept that the photosensitivity associated with XPA involves PAF- and aSMase-mediated MVP release and provides a potential pharmacologic target in treating this form of photosensitivity.
Collapse
Affiliation(s)
- Lea Christian
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Pranali Manjrekar
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Karen M. Henkels
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Christine M. Rapp
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Risha Annamraju
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Rushabh P. Lohade
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Shikshita Singh
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | | | - Saman Khan
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Michael G. Kemp
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
- The Dayton V.A. Medical Center, Dayton, OH
| | - Yanfang Chen
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Ravi P. Sahu
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
| | - Jeffrey B. Travers
- Department of Pharmacology & Toxicology, Wright State University, Dayton OH
- Department of Dermatology, Wright State University, Dayton OH
- The Dayton V.A. Medical Center, Dayton, OH
| |
Collapse
|
2
|
Shi T, Wang J, Dong J, Hu P, Guo Q. Periodontopathogens Porphyromonas gingivalis and Fusobacterium nucleatum and Their Roles in the Progression of Respiratory Diseases. Pathogens 2023; 12:1110. [PMID: 37764918 PMCID: PMC10535846 DOI: 10.3390/pathogens12091110] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/18/2023] [Accepted: 08/28/2023] [Indexed: 09/29/2023] Open
Abstract
The intricate interplay between oral microbiota and the human host extends beyond the confines of the oral cavity, profoundly impacting the general health status. Both periodontal diseases and respiratory diseases show high prevalence worldwide and have a marked influence on the quality of life for the patients. Accumulating studies are establishing a compelling association between periodontal diseases and respiratory diseases. Here, in this review, we specifically focus on the key periodontal pathogenic bacteria Porphyromonas gingivalis and Fusobacterium nucleatum and dissect their roles in the onset and course of respiratory diseases, mainly pneumonia, chronic obstructive pulmonary disease, lung cancer, and asthma. The mechanistic underpinnings and molecular processes on how P. gingivalis and F. nucleatum contribute to the progression of related respiratory diseases are further summarized and analyzed, including: induction of mucus hypersecretion and chronic airway inflammation; cytotoxic effects to disrupt the morphology and function of respiratory epithelial cells; synergistic pathogenic effects with respiratory pathogens like Streptococcus pneumoniae and Pseudomonas aeruginosa. By delving into the complex relationship to periodontal diseases and periodontopathogens, this review helps unearth novel insights into the etiopathogenesis of respiratory diseases and inspires the development of potential therapeutic avenues and preventive strategies.
Collapse
Affiliation(s)
- Tao Shi
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Jiale Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Jiajia Dong
- Department of Pulmonary and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Pingyue Hu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Qiang Guo
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| |
Collapse
|
3
|
Oyebanji OA, Brewer C, Bayless S, Schmeusser B, Corbin DA, Sulentic CEW, Sherwin CMT, Chen Y, Rapp CM, Cates EE, Long Y, Travers JB, Rohan CA. Topical Photodynamic Therapy Generates Bioactive Microvesicle Particles: Evidence for a Pathway Involved in Immunosuppressive Effects. J Invest Dermatol 2023; 143:1279-1288.e9. [PMID: 36708950 PMCID: PMC10293022 DOI: 10.1016/j.jid.2022.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 01/26/2023]
Abstract
Although effective in treating actinic damage, topical photodynamic therapy (PDT) has been shown to be immunosuppressive through unknown mechanisms, which could potentially limit its effectiveness. Multiple types of environmental stressors, including PDT, can produce the immunosuppressive lipid mediator platelet-activating factor (PAF). Because PAF can produce subcellular microvesicle particles (MVPs), these studies tested whether PDT can generate PAF and MVP release and whether these are involved in PDT-induced immunosuppression. Previously, topical PDT using blue light and 5-aminolevulinic acid was found to be a potent stimulus for PAF production in mice and human skin explants and human patients, and we show that experimental PDT also generates high levels of MVP. PDT-generated MVPs were independent of the PAF receptor but were dependent on the MVP-generating enzyme acid sphingomyelinase. Patients undergoing topical PDT treatment to at least 10% of body surface area showed local and systemic immunosuppression as measured by inhibition of delayed-type hypersensitivity reactions. Finally, using a murine model of contact hypersensitivity, PDT immunosuppression was blocked by genetic and pharmacologic inhibition of acid sphingomyelinase and genetic inhibition of PAF receptor signaling. These studies describe a mechanism involving MVP through which PDT exerts immunomodulatory effects, providing a potential target to improve its effectiveness.
Collapse
Affiliation(s)
- Oladayo A Oyebanji
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Chad Brewer
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Sharlo Bayless
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Benjamin Schmeusser
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Danielle A Corbin
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Courtney E W Sulentic
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Catherine M T Sherwin
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA; Department of Pediatrics, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA; Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yanfang Chen
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Christine M Rapp
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Elizabeth E Cates
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA
| | - Yuhan Long
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA; Department of Dermatology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA; Dayton V.A. Medical Center, Dayton, Ohio, USA.
| | - Craig A Rohan
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA; Department of Dermatology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, USA; Dayton V.A. Medical Center, Dayton, Ohio, USA
| |
Collapse
|
4
|
Zoanni B, Aiello G, Negre-Salvayre A, Aldini G, Carini M, D'Amato A. Lipidome Investigation of Carnosine Effect on Nude Mice Skin to Prevent UV-A Damage. Int J Mol Sci 2023; 24:10009. [PMID: 37373157 DOI: 10.3390/ijms241210009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
The lipid profile of skin is fundamental in the maintenance of the protective barrier against the external environment. Signaling and constitutive lipids of this large organ are involved in inflammation, metabolism, aging, and wound healing, such as phospholipids, triglycerides, FFA, and sphingomyelin. Skin exposure to ultraviolet (UV) radiation results in a photoaging process that is an accelerated form of aging. UV-A radiation deeply penetrates the dermis and promotes damage to DNA, lipids, and proteins by increasing the generation of reactive oxygen species (ROS). Carnosine, an endogenous β-alanyl-L-histidine dipeptide, demonstrated antioxidant properties that prevent photoaging and modification of skin protein profiling, making carnosine a compelling ingredient to consider for use in dermatology. The aim of this research was to investigate the modification of skin lipidome after UV-A treatment in presence or not of topic administration of carnosine. Quantitative analyses based on high-resolution mass spectrometry of nude mice skin-extracted lipids resulted in several modifications of barrier composition after UV-A radiation, with or without carnosine treatment. In total, 328 out of 683 molecules showed significant alteration-262 after UV-A radiation and 126 after UV-A and carnosine treatment versus controls. Importantly, the increased oxidized TGs after UV-A radiation, responsible of dermis photoaging, were completely reverted by carnosine application to prevent the UV-A damage. Network analyses also showed that the production of ROS and the calcium and TNF signaling were modulated by UV-A and carnosine. In conclusion, lipidome analyses attested the carnosine activity to prevent the UV-A damage, reducing the lipid oxidation, the inflammation, and the dysregulation of lipid skin barrier.
Collapse
Affiliation(s)
- Beatrice Zoanni
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| | - Gilda Aiello
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
- Department of Human Science and Quality of Life Promotion, Telematic University San Raffaele, 00166 Rome, Italy
| | - Anne Negre-Salvayre
- Faculty of Medicine, Department of Biochemistry, INSERM U1297 and University of Toulouse, 31432 Toulouse, France
| | - Giancarlo Aldini
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| | - Marina Carini
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| | - Alfonsina D'Amato
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| |
Collapse
|
5
|
Tse BCY, Ferguson AL, Koay YC, Grau GE, Don AS, Byrne SN. Exposure to solar ultraviolet radiation establishes a novel immune suppressive lipidome in skin-draining lymph nodes. Front Immunol 2023; 13:1045731. [PMID: 36741361 PMCID: PMC9895826 DOI: 10.3389/fimmu.2022.1045731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/22/2022] [Indexed: 01/21/2023] Open
Abstract
The ability of ultraviolet radiation to suppress the immune system is thought to be central to both its beneficial (protection from autoimmunity) and detrimental (carcinogenic) effects. Previous work revealed a key role for lipids particularly platelet-activating factor and sphingosine-1-phosphate in mediating UV-induced immune suppression. We therefore hypothesized that there may be other UV-induced lipids that have immune regulatory roles. To assess this, mice were exposed to an immune suppressive dose of solar-simulated UV (8 J/cm2). Lipidomic analysis identified 6 lipids (2 acylcarnitines, 2 neutral lipids, and 2 phospholipids) with significantly increased levels in the skin-draining lymph nodes of UV-irradiated mice. Imaging mass spectrometry of the lipids in combination with imaging mass cytometry identification of lymph node cell subsets indicated a preferential location of UV-induced lipids to T cell areas. In vitro co-culture of skin-draining lymph node lipids with lymphocytes showed that lipids derived from UV-exposed mice have no effect on T cell activation but significantly inhibited T cell proliferation, indicating that the lipids play an immune regulatory role. These studies are important first steps in identifying novel lipids that contribute to UV-mediated immune suppression.
Collapse
Affiliation(s)
- Benita C. Y. Tse
- The University of Sydney, School of Medical Sciences, Faculty of Medicine and Health, Sydney, NSW, Australia
| | - Angela L. Ferguson
- The University of Sydney, School of Medical Sciences, Faculty of Medicine and Health, Sydney, NSW, Australia
| | - Yen Chin Koay
- The University of Sydney, School of Medical Sciences, Faculty of Medicine and Health, Sydney, NSW, Australia,Heart Research Institute, The University of Sydney, Sydney, NSW, Australia
| | - Georges E. Grau
- The University of Sydney, School of Medical Sciences, Faculty of Medicine and Health, Sydney, NSW, Australia
| | - Anthony S. Don
- The University of Sydney, School of Medical Sciences, Faculty of Medicine and Health, Sydney, NSW, Australia
| | - Scott N. Byrne
- The University of Sydney, School of Medical Sciences, Faculty of Medicine and Health, Sydney, NSW, Australia,Westmead Institute for Medical Research, Centre for Immunology and Allergy Research, Sydney, NSW, Australia,*Correspondence: Scott N. Byrne,
| |
Collapse
|
6
|
An Epidemiological Update on Indoor Tanning and the Risk of Skin Cancers. Curr Oncol 2022; 29:8886-8903. [PMID: 36421352 PMCID: PMC9689757 DOI: 10.3390/curroncol29110699] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 11/10/2022] [Accepted: 11/15/2022] [Indexed: 11/19/2022] Open
Abstract
Indoor tanning (sunbeds, solarium) uses artificial ultraviolet radiation (UVR) to stimulate cosmetic tanning of the skin. Indoor tanning has been officially classified as a human carcinogen in 2009 by the International Agency for Research on Cancer of the World Health Organization (WHO). The differences in the prevalence of sunbed use across countries and over the years highlight underlying legislative, climatic, and cultural differences. Indoor tanning-seeking behaviors may be driven by motivations for an appealing appearance, largely influenced by gender and age, and several misconceptions that a prevacation tan safeguards the skin, that sunbeds can be used to treat acne or to increase vitamin D, or that tanning is a healthy habit. This review provides an epidemiological update on the prevalence of sunbed use, who tends to use sunbeds and why, and details the current evidence on the association of sunbeds with skin cancers, including cutaneous melanoma, basal cell carcinoma (BCC), and cutaneous squamous cell carcinoma (cSCC). A statistically significant higher risk of cutaneous melanoma, BCC and cSCC with the use of sunbeds has been consistently demonstrated. This risk of skin cancer is even higher with the more frequent use of sunbeds, underscoring a dose-response relationship, and in those first exposed to sunbeds at a younger age. Preventive measures against sunbed use include legislation restricting sunbed use, educational campaigns to inform and discourage from indoor tanning, as well as using the internet, online advertising messages and the social media to reach larger audiences and to promote an untanned appearance.
Collapse
|
7
|
Frommeyer TC, Gilbert MM, Brittain GV, Wu T, Nguyen TQ, Rohan CA, Travers JB. UVB-Induced Microvesicle Particle Release and Its Effects on the Cutaneous Microenvironment. Front Immunol 2022; 13:880850. [PMID: 35603177 PMCID: PMC9120817 DOI: 10.3389/fimmu.2022.880850] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 04/04/2022] [Indexed: 12/14/2022] Open
Abstract
Ultraviolet B radiation (UVB) has profound effects on human skin that results in a broad spectrum of immunological local and systemic responses and is the major cause of skin carcinogenesis. One important area of study in photobiology is how UVB is translated into effector signals. As the skin is exposed to UVB light, subcellular microvesicle particles (MVP), a subtype of bioactive extracellular vesicles, are released causing a variety of local and systemic immunological effects. In this review, we highlight keratinocyte MVP release in keratinocytes in response to UVB. Specifically, Platelet-activating factor receptor agonists generated by UVB result in MVP released from keratinocytes. The downstream effects of MVP release include the ability of these subcellular particles to transport agents including the glycerophosphocholine-derived lipid mediator Platelet-activating factor (PAF). Moreover, even though UVB is only absorbed in the epidermis, it appears that PAF release from MVPs also mediates systemic immunosuppression and enhances tumor growth and metastasis. Tumor cells expressing PAF receptors can use this mechanism to evade chemotherapy responses, leading to treatment resistance for advanced cancers such as melanoma. Furthermore, novel pharmacological agents provide greater insight into the UVB-induced immune response pathway and a potential target for pharmacological intervention. This review outlines the need to more clearly elucidate the mechanism linking UVB-irradiation with the cutaneous immune response and its pathological manifestations. An improved understanding of this process can result in new insights and treatment strategies for UVB-related disorders from carcinogenesis to photosensitivity.
Collapse
Affiliation(s)
- Timothy C. Frommeyer
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
| | - Michael M. Gilbert
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
| | - Garrett V. Brittain
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
| | - Tongfan Wu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
| | - Trang Q. Nguyen
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
| | - Craig A. Rohan
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
- Department of Dermatology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
- Department of Medicine, Dayton Veterans Administration Medical Center, Dayton, OH, United States
| | - Jeffrey B. Travers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
- Department of Dermatology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
- Department of Medicine, Dayton Veterans Administration Medical Center, Dayton, OH, United States
- *Correspondence: Jeffrey B. Travers,
| |
Collapse
|
8
|
Thapa P, Bhadri S, Borchers C, Liu L, Chen Y, Rapp CM, Travers JB. Low UVB Fluences Augment Microvesicle Particle Generation in Keratinocytes. Photochem Photobiol 2022; 98:248-253. [PMID: 34324709 PMCID: PMC8799755 DOI: 10.1111/php.13495] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 07/27/2021] [Indexed: 01/03/2023]
Abstract
Microvesicle particles (MVP) are bioactive subcellular particles which have been recently implicated in the keratinocyte response to many environmental stressors including ultraviolet B radiation (UVB). Previous studies have demonstrated that UVB generates high levels of MVP in a process involving the platelet-activating factor receptor (PAFR) and the enzyme acid sphingomyelinase (aSMase). Yet the fluences of UVB needed to generate MVP are usually above those commonly encountered. Using models including human epithelial cell lines in vitro, human skin explants ex vivo and murine studies in vivo, the present studies indicate that pretreatment of epithelial cells/skin with PAFR agonist/phorbol ester can synergize with low fluences of UVB to generate high levels of MVP. These studies indicate the possibility that MVP could play a role in combinatorial pathologic processes involving UVB.
Collapse
Affiliation(s)
- Pariksha Thapa
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Shweta Bhadri
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Christina Borchers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Langni Liu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Yanfang Chen
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Christine M. Rapp
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Jeffrey B. Travers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435,Department of Dermatology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435,The Dayton V.A. Medical Center, Dayton, OH 45428.,Corresponding author: (Jeffrey B. Travers)
| |
Collapse
|
9
|
Bhadri S, Thapa P, Chen Y, Rapp CM, Travers JB. Evidence for microvesicle particles in UVB-mediated IL-8 generation in keratinocytes. JOURNAL OF CLINICAL AND INVESTIGATIVE DERMATOLOGY 2021; 9. [PMID: 34950767 DOI: 10.13188/2373-1044.1000076] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recent studies have implicated bioactive microvesicle particles (MVP) in the keratinocyte response to many environmental stressors, in partricular ultraviolet B radiation (UVB). The generation of MVP in response to UVB involves the Platelet-activating factor receptor (PAFR) and the enzyme acid sphingomyelinase (aSMase). As UVB generates some cytokines such as interleukin-8 (IL-8) in a PAFR-dependent manner, one question is if the production and release of IL-8 and MVP could be linked. Using the human keratinocyte-derived cell line HaCaT, the present in vitro studies indicate that pretreatment of HaCaT keratinocytes with PAFR agonist ester can synergize with low fluences of UVB to generate high levels of MVP as well as IL-8 protein. Treatment of cells with an aSMase pharmacologic inhibitor blocked both processes. These studies indicate the possibility that MVP could be involved in pathologic processes involving UVB-generated production of pro-inflammatory cytokines such as IL-8.
Collapse
Affiliation(s)
- Shweta Bhadri
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Pariksha Thapa
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Yanfang Chen
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Christine M Rapp
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435.,Department of Dermatology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435.,The Dayton V.A. Medical Center, Dayton, OH 45428
| |
Collapse
|
10
|
Tse BCY, Ireland RA, Lee JY, Marsh-Wakefield F, Kok LF, Don AS, Byrne SN. Exposure to Systemic Immunosuppressive Ultraviolet Radiation Alters T Cell Recirculation through Sphingosine-1-Phosphate. THE JOURNAL OF IMMUNOLOGY 2021; 207:2278-2287. [PMID: 34561229 DOI: 10.4049/jimmunol.2001261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 08/25/2021] [Indexed: 11/19/2022]
Abstract
Systemic suppression of adaptive immune responses is a major way in which UV radiation contributes to skin cancer development. Immune suppression is also likely to explain how UV protects from some autoimmune diseases, such as multiple sclerosis. However, the mechanisms underlying UV-mediated systemic immune suppression are not well understood. Exposure of C57BL/6 mice to doses of UV known to suppress systemic autoimmunity led to the accumulation of cells within the skin-draining lymph nodes and away from non-skin-draining lymph nodes. Transfer of CD45.1+ cells from nonirradiated donors into CD45.2+ UV-irradiated recipients resulted in preferential accumulation of donor naive T cells and a decrease in activated T cells within skin-draining lymph nodes. A single dose of immune-suppressive UV was all that was required to cause a redistribution of naive and central memory T cells from peripheral blood to the skin-draining lymph nodes. Specifically, CD69-independent increases in sphingosine-1-phosphate (S1P) receptor 1-negative naive and central memory T cells occurred in these lymph nodes. Mass spectrometry analysis showed UV-mediated activation of sphingosine kinase 1 activity, resulting in an increase in S1P levels within the lymph nodes. Topical application of a sphingosine kinase inhibitor on the skin prior to UV irradiation eliminated the UV-induced increase in lymph node S1P and T cell numbers. Thus, exposure to immunosuppressive UV disrupts T cell recirculation by manipulating the S1P pathway.
Collapse
Affiliation(s)
- Benita C Y Tse
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Rachael A Ireland
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.,Westmead Institute for Medical Research, Centre for Immunology and Allergy Research, Westmead, New South Wales, Australia; and
| | - Jun Yup Lee
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Felix Marsh-Wakefield
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Lai Fong Kok
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Anthony S Don
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.,Centenary Institute, The University of Sydney, Sydney, New South Wales, Australia
| | - Scott N Byrne
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia; .,Westmead Institute for Medical Research, Centre for Immunology and Allergy Research, Westmead, New South Wales, Australia; and
| |
Collapse
|
11
|
Haak VM, Huang S, Panigrahy D. Debris-stimulated tumor growth: a Pandora's box? Cancer Metastasis Rev 2021; 40:791-801. [PMID: 34665387 PMCID: PMC8524220 DOI: 10.1007/s10555-021-09998-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 10/01/2021] [Indexed: 12/24/2022]
Abstract
Current cancer therapies aim at eradicating cancer cells from the body. However, killing cells generates cell “debris” which can promote tumor progression. Thus, therapy can be a double-edged sword. Specifically, injury and debris generated by cancer therapies, including chemotherapy, radiation, and surgery, may offset their benefit by promoting the secretion of pro-tumorigenic factors (e.g., eicosanoid-driven cytokines) that stimulate regrowth and metastasis of surviving cells. The debris produced by cytotoxic cancer therapy can also contribute to a tumor microenvironment that promotes tumor progression and recurrence. Although not well understood, several molecular mechanisms have been implicated in debris-stimulated tumor growth that we review here, such as the involvement of extracellular vesicles, exosomal miR-194-5p, Bax, Bak, Smac, HMGB1, cytokines, and caspase-3. We discuss the cases of pancreatic and other cancer types where debris promotes postoperative tumor recurrence and metastasis, thus offering a new opportunity to prevent cancer progression intrinsically linked to treatment by stimulating resolution of tumor-promoting debris.
Collapse
Affiliation(s)
- Victoria M Haak
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
- Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA.
| | - Sui Huang
- Institute for Systems Biology, Seattle, WA, USA
| | - Dipak Panigrahy
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| |
Collapse
|
12
|
Liu L, Awoyemi AA, Fahy KE, Thapa P, Borchers C, Wu BY, McGlone CL, Schmeusser B, Sattouf Z, Rohan CA, Williams AR, Cates EE, Knisely C, Kelly LE, Bihl JC, Cool DR, Sahu RP, Wang J, Chen Y, Rapp CM, Kemp MG, Johnson RM, Travers JB. Keratinocyte-derived microvesicle particles mediate ultraviolet B radiation-induced systemic immunosuppression. J Clin Invest 2021; 131:144963. [PMID: 33830943 DOI: 10.1172/jci144963] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 04/07/2021] [Indexed: 12/11/2022] Open
Abstract
A complete carcinogen, ultraviolet B (UVB) radiation (290-320 nm), is the major cause of skin cancer. UVB-induced systemic immunosuppression that contributes to photocarcinogenesis is due to the glycerophosphocholine-derived lipid mediator platelet-activating factor (PAF). A major question in photobiology is how UVB radiation, which only absorbs appreciably in the epidermal layers of skin, can generate systemic effects. UVB exposure and PAF receptor (PAFR) activation in keratinocytes induce the release of large numbers of microvesicle particles (MVPs; extracellular vesicles ranging from 100 to 1000 nm in size). MVPs released from skin keratinocytes in vitro in response to UVB (UVB-MVPs) are dependent on the keratinocyte PAFR. Here, we used both pharmacologic and genetic approaches in cells and mice to show that both the PAFR and enzyme acid sphingomyelinase (aSMase) were necessary for UVB-MVP generation. Our discovery that the calcium-sensing receptor is a keratinocyte-selective MVP marker allowed us to determine that UVB-MVPs leaving the keratinocyte can be found systemically in mice and humans following UVB exposure. Moreover, we found that UVB-MVPs contained bioactive contents including PAFR agonists that allowed them to serve as effectors for UVB downstream effects, in particular UVB-mediated systemic immunosuppression.
Collapse
Affiliation(s)
- Langni Liu
- Department of Pharmacology and Toxicology
| | | | | | | | | | | | | | | | | | - Craig A Rohan
- Department of Pharmacology and Toxicology.,Department of Dermatology, and
| | | | | | | | | | - Ji C Bihl
- Department of Pharmacology and Toxicology
| | | | | | - Jinju Wang
- Department of Pharmacology and Toxicology
| | | | | | | | - R Michael Johnson
- Department of Plastic Surgery, Wright State University, Dayton, Ohio, USA
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology.,Department of Dermatology, and.,Dayton VA Medical Center, Dayton, Ohio, USA
| |
Collapse
|
13
|
Gu HJ, Peng L, Jiang WC, Tan YM, Zhou GJ, Kan HD, Chen RJ, Zou Y. Impact of solar ultraviolet radiation on daily outpatient visits of atopic dermatitis in Shanghai, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:18081-18088. [PMID: 33405118 DOI: 10.1007/s11356-020-11907-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
The potential roles of solar ultraviolet radiation (UVR) as an environmental risk factor in inducing atopic dermatitis (AD) have not been well quantified. To determine the short-term associations between UVR and AD outpatient visits, we obtained daily outpatient visits of AD in Shanghai Skin Disease Hospital from 2013 to 2018. Data of hourly ground UVR were collected. We applied overdispersed generalized additive model to explore its associations. We found that daily exposure to UVR-A rather than UVR-B was positively associated with AD outpatient visits. The visits increased on the present day (lag 0 days) and decreased appreciably with longer lags and became insignificant at lag 4 days. For 10 w/m2 increase in daytime mean and noontime mean exposure to overall UVR and UVR-A from lag 0 to 6 days, the cumulative relative risk of AD was 1.12/1.13 and 1.08/1.08, respectively. Stronger effects of UVR exposure on AD occurred in patients aged 0-7 and > 45 years and in the cold seasons. This study contributed to the few epidemiological evidences that acute exposure to solar UVR may elevate the risks of AD.
Collapse
Affiliation(s)
- Hui-Jing Gu
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, 1278 Baode Road, Jingan District, Shanghai, 200443, China
| | - Li Peng
- Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, 166 Puxi Road, Xuhui District, Shanghai, 200030, China
| | - Wen-Cai Jiang
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, 1278 Baode Road, Jingan District, Shanghai, 200443, China
- NMPA Key Laboratory for Monitoring and Evaluation of Cosmetics, Zhangheng Road, Pudong New District, Shanghai, 201203, China
| | - Yi-Mei Tan
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, 1278 Baode Road, Jingan District, Shanghai, 200443, China
- NMPA Key Laboratory for Monitoring and Evaluation of Cosmetics, Zhangheng Road, Pudong New District, Shanghai, 201203, China
| | - Guo-Jiang Zhou
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, 1278 Baode Road, Jingan District, Shanghai, 200443, China
- Xiangya School of Public Health, Central South University, 238 Shang Ma Yuan Ling Lane, Changsha, 410078, China
| | - Hai-Dong Kan
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and NHC Key Laboratory of Health Technology Assessment, Fudan University, P.O. Box 249, 130 Dong-An Road, Shanghai, 200032, China
| | - Ren-Jie Chen
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and NHC Key Laboratory of Health Technology Assessment, Fudan University, P.O. Box 249, 130 Dong-An Road, Shanghai, 200032, China
| | - Ying Zou
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, 1278 Baode Road, Jingan District, Shanghai, 200443, China.
- NMPA Key Laboratory for Monitoring and Evaluation of Cosmetics, Zhangheng Road, Pudong New District, Shanghai, 201203, China.
| |
Collapse
|
14
|
Worrede A, Douglass SM, Weeraratna AT. The dark side of daylight: photoaging and the tumor microenvironment in melanoma progression. J Clin Invest 2021; 131:143763. [PMID: 33720046 DOI: 10.1172/jci143763] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Continued thinning of the atmospheric ozone, which protects the earth from damaging ultraviolet radiation (UVR), will result in elevated levels of UVR reaching the earth's surface, leading to a drastic increase in the incidence of skin cancer. In addition to promoting carcinogenesis in skin cells, UVR is a potent extrinsic driver of age-related changes in the skin known as "photoaging." We are in the preliminary stages of understanding of the role of intrinsic aging in melanoma, and the tumor-permissive effects of photoaging on the skin microenvironment remain largely unexplored. In this Review, we provide an overview of the impact of UVR on the skin microenvironment, addressing changes that converge or diverge with those observed in intrinsic aging. Intrinsic and extrinsic aging promote phenotypic changes to skin cell populations that alter fundamental processes such as melanogenesis, extracellular matrix deposition, inflammation, and immune response. Given the relevance of these processes in cancer, we discuss how photoaging might render the skin microenvironment permissive to melanoma progression.
Collapse
Affiliation(s)
- Asurayya Worrede
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Stephen M Douglass
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Ashani T Weeraratna
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.,Sidney Kimmel Cancer Center, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| |
Collapse
|
15
|
Rindler K, Krausgruber T, Thaler FM, Alkon N, Bangert C, Kurz H, Fortelny N, Rojahn TB, Jonak C, Griss J, Bock C, Brunner PM. Spontaneously Resolved Atopic Dermatitis Shows Melanocyte and Immune Cell Activation Distinct From Healthy Control Skin. Front Immunol 2021; 12:630892. [PMID: 33717163 PMCID: PMC7943477 DOI: 10.3389/fimmu.2021.630892] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 02/01/2021] [Indexed: 01/11/2023] Open
Abstract
Atopic dermatitis (AD) typically starts in infancy or early childhood, showing spontaneous remission in a subset of patients, while others develop lifelong disease. Despite an increased understanding of AD, factors guiding its natural course are only insufficiently elucidated. We thus performed suction blistering in skin of adult patients with stable, spontaneous remission from previous moderate-to-severe AD during childhood. Samples were compared to healthy controls without personal or familial history of atopy, and to chronic, active AD lesions. Skin cells and tissue fluid obtained were used for single-cell RNA sequencing and proteomic multiplex assays, respectively. We found overall cell composition and proteomic profiles of spontaneously healed AD to be comparable to healthy control skin, without upregulation of typical AD activity markers (e.g., IL13, S100As, and KRT16). Among all cell types in spontaneously healed AD, melanocytes harbored the largest numbers of differentially expressed genes in comparison to healthy controls, with upregulation of potentially anti-inflammatory markers such as PLA2G7. Conventional T-cells also showed increases in regulatory markers, and a general skewing toward a more Th1-like phenotype. By contrast, gene expression of regulatory T-cells and keratinocytes was essentially indistinguishable from healthy skin. Melanocytes and conventional T-cells might thus contribute a specific regulatory milieu in spontaneously healed AD skin.
Collapse
Affiliation(s)
- Katharina Rindler
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Thomas Krausgruber
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Felix M. Thaler
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Natalia Alkon
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Christine Bangert
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Harald Kurz
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Nikolaus Fortelny
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Thomas B. Rojahn
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Constanze Jonak
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Johannes Griss
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Christoph Bock
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Center for Medical Statistics, Informatics, and Intelligent Systems, Institute of Artificial Intelligence and Decision Support, Medical University of Vienna, Vienna, Austria
| | - Patrick M. Brunner
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| |
Collapse
|
16
|
Travers JB, Rohan JG, Sahu RP. New Insights Into the Pathologic Roles of the Platelet-Activating Factor System. Front Endocrinol (Lausanne) 2021; 12:624132. [PMID: 33796070 PMCID: PMC8008455 DOI: 10.3389/fendo.2021.624132] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/17/2021] [Indexed: 12/15/2022] Open
Abstract
Described almost 50 years ago, the glycerophosphocholine lipid mediator Platelet-activating factor (PAF) has been implicated in many pathologic processes. Indeed, elevated levels of PAF can be measured in response to almost every type of pathology involving inflammation and cell damage/death. In this review, we provide evidence for PAF involvement in pathologic processes, with focus on cancer, the nervous system, and in photobiology. Importantly, recent insights into how PAF can generate and travel via bioactive extracellular vesicles such as microvesicle particles (MVP) are presented. What appears to be emerging from diverse pathologies in different organ systems is a common theme where pro-oxidative stressors generate oxidized glycerophosphocholines with PAF agonistic effects, which then trigger more enzymatic PAF synthesis via the PAF receptor. A downstream consequence of PAF receptor activation is the generation and release of MVP which provide a mechanism to transmit PAF as well as other bioactive agents. The knowledge gaps which when addressed could result in novel therapeutic strategies are also discussed. Taken together, an enhanced understanding of the PAF family of lipid mediators is essential in our improved comprehension of the relationship amongst the diverse cutaneous, cancerous, neurologic and systemic pathologic processes.
Collapse
Affiliation(s)
- Jeffrey B. Travers
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
- Department of Dermatology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
- Dayton Veterans Administration Medical Center, Dayton, OH, United States
- *Correspondence: Jeffrey B. Travers, ; orcid.org/0000-0001-7232-1039
| | - Joyce G. Rohan
- Naval Medical Research Unit Dayton, Environmental Health Effects Directorate, Wright Patterson Air Force Base, OH, United States
| | - Ravi P. Sahu
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, United States
| |
Collapse
|
17
|
Vieyra-Garcia PA, Wolf P. A deep dive into UV-based phototherapy: Mechanisms of action and emerging molecular targets in inflammation and cancer. Pharmacol Ther 2020; 222:107784. [PMID: 33316286 DOI: 10.1016/j.pharmthera.2020.107784] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023]
Abstract
UV-based phototherapy (including psoralen plus UVA (PUVA), UVB and UVA1) has a long, successful history in the management of numerous cutaneous disorders. Photoresponsive diseases are etiologically diverse, but most involve disturbances in local (and occasionally systemic) inflammatory cells and/or abnormalities in keratinocytes that trigger inflammation. UV-based phototherapy works by regulating the inflammatory component and inducing apoptosis of pathogenic cells. This results in a fascinating and complex network of simultaneous events-immediate transcriptional changes in keratinocytes, immune cells, and pigment cells; the emergence of apoptotic bodies; and the trafficking of antigen-presenting cells in skin-that quickly transform the microenvironment of UV-exposed skin. Molecular elements in this system of UV recognition and response include chromophores, metabolic byproducts, innate immune receptors, neurotransmitters and mediators such as chemokines and cytokines, antimicrobial peptides, and platelet activating factor (PAF) and PAF-like molecules that simultaneously shape the immunomodulatory effects of UV and their interplay with the microbiota of the skin and beyond. Phototherapy's key effects-proapoptotic, immunomodulatory, antipruritic, antifibrotic, propigmentary, and pro-prebiotic-promote clinical improvement in various skin diseases such as psoriasis, atopic dermatitis (AD), graft-versus-host disease (GvHD), vitiligo, scleroderma, and cutaneous T-cell lymphoma (CTCL) as well as prevention of polymorphic light eruption (PLE). As understanding of phototherapy improves, new therapies (UV- and non-UV-based) are being developed that will modify regulatory T-cells (Treg), interact with (resident) memory T-cells and /or utilize agonists and antagonists as well as antibodies targeting soluble molecules such as cytokines and chemokines, transcription factors, and a variety of membrane-associated receptors.
Collapse
Affiliation(s)
- Pablo A Vieyra-Garcia
- Department of Dermatology, Medical University of Graz, Auenbruggerplatz 8, Graz A-8036, Austria.
| | - Peter Wolf
- Department of Dermatology, Medical University of Graz, Auenbruggerplatz 8, Graz A-8036, Austria.
| |
Collapse
|
18
|
Platelet-Activating Factor-Receptor Signaling Mediates Targeted Therapies-Induced Microvesicle Particles Release in Lung Cancer Cells. Int J Mol Sci 2020; 21:ijms21228517. [PMID: 33198218 PMCID: PMC7696385 DOI: 10.3390/ijms21228517] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 12/25/2022] Open
Abstract
Microvesicle particles (MVP) secreted by a variety of cell types in response to reactive oxygen species (ROS)-generating pro-oxidative stressors have been implicated in modifying the cellular responses including the sensitivity to therapeutic agents. Our previous studies have shown that expression of a G-protein coupled, platelet-activating factor-receptor (PAFR) pathway plays critical roles in pro-oxidative stressors-mediated cancer growth and MVP release. As most therapeutic agents act as pro-oxidative stressors, the current studies were designed to determine the role of the PAFR signaling in targeted therapies (i.e., gefitinib and erlotinib)-mediated MVP release and underlying mechanisms using PAFR-expressing human A549 and H1299 non-small cell lung cancer (NSCLC) cell lines. Our studies demonstrate that both gefitinib and erlotinib generate ROS in a dose-dependent manner in a process blocked by antioxidant and PAFR antagonist, verifying their pro-oxidative stressor’s ability, and the role of the PAFR in this effect. We observed that these targeted therapies induce MVP release in a dose- and time-dependent manner, similar to a PAFR-agonist, carbamoyl-PAF (CPAF), and PAFR-independent agonist, phorbol myristate acetate (PMA), used as positive controls. To confirm the PAFR dependency, we demonstrate that siRNA-mediated PAFR knockdown or PAFR antagonist significantly blocked only targeted therapies- and CPAF-mediated but not PMA-induced MVP release. The use of pharmacologic inhibitor strategy suggested the involvement of the lipid ceramide-generating enzyme, acid sphingomyelinase (aSMase) in MVP biogenesis, and observed that regardless of the stimuli used, aSMase inhibition significantly blocked MVP release. As mitogen-activated protein kinase (MAPK; ERK1/2 and p38) pathways crosstalk with PAFR, their inhibition also significantly attenuated targeted therapies-mediated MVP release. These findings indicate that PAFR signaling could be targeted to modify cellular responses of targeted therapies in lung cancer cells.
Collapse
|
19
|
Malavige GN, Jeewandara C, Ogg GS. Dysfunctional Innate Immune Responses and Severe Dengue. Front Cell Infect Microbiol 2020; 10:590004. [PMID: 33194836 PMCID: PMC7644808 DOI: 10.3389/fcimb.2020.590004] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/15/2020] [Indexed: 12/14/2022] Open
Abstract
Although infection with the dengue virus (DENV) causes severe dengue, it causes a mild self-limiting illness in the majority of individuals. There is emerging evidence that an aberrant immune response in the initial stages of infection lead to severe disease. Many inflammatory cytokines, chemokines, and lipid mediators are significantly higher in patients with severe dengue compared to those who develop mild infection, during febrile phase of illness. Monocytes, mast cells, and many other cells of the immune system, when infected with the DENV, especially in the presence of poorly neutralizing antibodies, leads to production of pro-inflammatory cytokines and inhibition of interferon signaling pathways. In addition, production of immunosuppressive cytokines such as IL-10 further leads to inhibition of cellular antiviral responses. This dysregulated and aberrant immune response leads to reduced clearance of the virus, and severe dengue by inducing a vascular leak and excessive inflammation due to high levels of inflammatory cytokines. Individuals with comorbid illnesses could be prone to more severe dengue due to low grade endotoxemia, gut microbial dysbiosis and an altered phenotype of innate immune cells. The immunosuppressive and inflammatory lipid mediators and altered phenotype of monocytes are likely to further act on T cells and B cells leading to an impaired adaptive immune response to the virus. Therefore, in order to identify therapeutic targets for treatment of dengue, it would be important to further characterize these mechanisms in order for early intervention. In this review, we discuss the differences in the innate immune responses in those who progress to develop severe dengue, compared to those with milder disease in order to understand the mechanisms that lead to severe dengue.
Collapse
Affiliation(s)
- Gathsaurie Neelika Malavige
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.,MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Chandima Jeewandara
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Graham S Ogg
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.,MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| |
Collapse
|
20
|
Nie J, Yang J, Wei Y, Wei X. The role of oxidized phospholipids in the development of disease. Mol Aspects Med 2020; 76:100909. [PMID: 33023753 DOI: 10.1016/j.mam.2020.100909] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 08/29/2020] [Accepted: 09/21/2020] [Indexed: 02/05/2023]
Abstract
Oxidized phospholipids (OxPLs), complex mixtures of phospholipid oxidation products generated during normal or pathological processes, are increasingly recognized to show bioactive effects on many cellular signalling pathways. There is a growing body of evidence showing that OxPLs play an important role in many diseases, so it is essential to define the specific role of OxPLs in different diseases for the design of disease therapies. In vastly diverse pathological processes, OxPLs act as pro-inflammatory agents and contribute to the progression of many diseases; in addition, they play a role in anti-inflammatory processes, promoting the dissipation of inflammation and inhibiting the progression of some diseases. In addition to participating in the regulation of inflammatory responses, OxPLs affect the occurrence and development of diseases through other pathways, such as apoptosis promotion. In this review, the different and even opposite effects of different OxPL molecular species are discussed. Furthermore, the specific effects of OxPLs in various diseases, as well as the receptor and cellular mechanisms involved, are summarized.
Collapse
Affiliation(s)
- Ji Nie
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China; Department of Respiration, First People's Hospital of Yunnan Province, Yunnan, 650032, China; The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, 650032, China
| | - Jing Yang
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China; Melanoma and Sarcoma Medical Oncology Unit, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 651 Dongfeng Road East, Guangzhou, 510060, China; State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Yuquan Wei
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Xiawei Wei
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, China.
| |
Collapse
|
21
|
Liu L, Fahy KE, Awoyemi AA, Thapa P, Kelly LE, Chen J, Bihl JC, Cool DR, Chen Y, Rapp CM, Johnson RM, Travers JB. Thermal Burn Injury Generates Bioactive Microvesicles: Evidence for a Novel Transport Mechanism for the Lipid Mediator Platelet-Activating Factor (PAF) That Involves Subcellular Particles and the PAF Receptor. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2020; 205:193-201. [PMID: 32434939 PMCID: PMC7342023 DOI: 10.4049/jimmunol.1901393] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 04/22/2020] [Indexed: 12/22/2022]
Abstract
Thermal burn injuries are an important environmental stressor that can result in considerable morbidity and mortality. The exact mechanism by which an environmental stimulus to skin results in local and systemic effects is an area of active research. One potential mechanism to allow skin keratinocytes to disperse bioactive substances is via microvesicle particles, which are subcellular bodies released directly from cellular membranes. Our previous studies have indicated that thermal burn injury of the skin keratinocyte in vitro results in the production of the lipid mediator platelet-activating factor (PAF). The present studies demonstrate that thermal burn injury to keratinocytes in vitro and human skin explants ex vivo, and mice in vivo generate microvesicle particles. Use of pharmacologic and genetic tools indicates that the optimal release of microvesicles is dependent upon the PAF receptor. Of note, burn injury-stimulated microvesicle particles do not carry appreciable protein cytokines yet contain high levels of PAF. These studies describe a novel mechanism involving microvesicle particles by which a metabolically labile bioactive lipid can travel from cells in response to environmental stimuli.
Collapse
Affiliation(s)
- Langni Liu
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Katherine E Fahy
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Azeezat A Awoyemi
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Pariksha Thapa
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Lisa E Kelly
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Jay Chen
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Ji C Bihl
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - David R Cool
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Yanfang Chen
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - Christine M Rapp
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435
| | - R Michael Johnson
- Department of Plastic Surgery, Wright State University, Dayton, OH 45435
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH 45435;
- Department of Dermatology, Wright State University, Dayton, OH 45435; and
- Dayton VA Medical Center, Dayton, OH 45428
| |
Collapse
|
22
|
Abstract
Phototherapeutic modalities induce apoptosis of keratinocytes and immune cells, impact cytokine production, downregulate the IL-23/Th17 axis, and induce regulatory T cells. As in anti-IL-17 or anti-IL-23 antibody treatment, the dual action of phototherapy on skin and the immune system is likely responsible for sustained resolution of lesions in diseases such as psoriasis. In cutaneous T cell lymphoma, phototherapy may function by causing tumor cell apoptosis and eliminating the neoplastic and inflammatory infiltrate. Further research on phototherapeutic mechanisms will help advance, optimize, and refine dermatologic treatments and may open up novel avenues for treatment strategies in dermatology and beyond.
Collapse
Affiliation(s)
- Zizi Yu
- Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA
| | - Peter Wolf
- Department of Dermatology, Research Unit for Photodermatology, Medical University of Graz, Auenbruggerplatz 8, Graz A-8036, Austria.
| |
Collapse
|
23
|
Liu F, Li S, Yu Y, Sun M, Xiang J, Li F. Effects of ammonia stress on the hemocytes of the Pacific white shrimp Litopenaeus vannamei. CHEMOSPHERE 2020; 239:124759. [PMID: 31518920 DOI: 10.1016/j.chemosphere.2019.124759] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 08/31/2019] [Accepted: 09/03/2019] [Indexed: 06/10/2023]
Abstract
Ammonia is an important environmental stress factor in aquaculture. Long-term ammonia stress could affect the normal growth, and also increase the risk for the occurrence of various diseases. In order to learn the mechanism that ammonia caused the outbreak of the shrimp disease, transcriptomics and metabolomics approaches were used to analyze the differential expressions of the genes in hemocytes and different metabolites in the serum of the Pacific white shrimp Litopenaeus vannamei under ammonia exposure. Transcriptional analysis showed that 17 cell apoptosis related genes, seven phagocytosis related genes, 10 immunity related genes and seven cell cycle and lipid metabolism related genes showed differential expressions after ammonia exposure. Metabolomics analysis on the serum showed that 25 differential metabolites were identified in positive and negative ion patterns. They are involved in purine metabolism, amino acids metabolism and lipid metabolism. Injection of two up-regulated metabolites triethanolamine and oxypurinol to normal shrimp could induce apoptosis in normal shrimp. The total hemocytes counts in shrimp showed a significant decrease and the apoptotic cell ratio increased significantly under ammonia exposure. These results suggested that ammonia exposure increased the apoptosis of hemocytes, which affected the immunity of shrimp, and thus caused susceptibility to pathogenic infection. These data will help us understand the mechanism of ammonia stress leading to the immunity decline of shrimp.
Collapse
Affiliation(s)
- Fei Liu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Shihao Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China
| | - Yang Yu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China
| | - Mingzhe Sun
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianhai Xiang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Fuhua Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China.
| |
Collapse
|
24
|
Tse BCY, Byrne SN. Lipids in ultraviolet radiation-induced immune modulation. Photochem Photobiol Sci 2020; 19:870-878. [DOI: 10.1039/d0pp00146e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Ultraviolet (UV) radiation modulates cutaneous lipids which in turn mediates immune suppression – a key mechanism conferring both detrimental and beneficial impacts of sun exposure on human health.
Collapse
Affiliation(s)
- Benita C. Y. Tse
- The University of Sydney
- School of Medical Sciences
- Faculty of Medicine and Health
- Sydney
- Australia
| | - Scott N. Byrne
- The University of Sydney
- School of Medical Sciences
- Faculty of Medicine and Health
- Sydney
- Australia
| |
Collapse
|
25
|
Abstract
Environmental stressors exert a profound effect on humans. Many environmental stressors have in common the ability to induce reactive oxygen species. The goal of this chapter is to present evidence that the potent lipid mediator platelet-activating factor (PAF) is involved in the effects of many stressors ranging from cigarette smoke to ultraviolet B radiation. These environmental stressors can generate PAF enzymatically as well as PAF-like lipids produced by free radical-mediated attack of glycerophosphocholines. Inasmuch as PAF exerts both acute inflammation and delayed immunosuppressive effects, involvement of the PAF system can provide an explanation for many consequences of environmental stressor exposures.
Collapse
Affiliation(s)
- Jeffrey B Travers
- Department of Pharmacology and Toxicology, Wright State University, Dayton, OH, USA.
- Dayton Veterans Administration Medical Center, Dayton, OH, USA.
| |
Collapse
|
26
|
Abstract
PURPOSE OF REVIEW Patients seen at pediatric rheumatology are at increased risk of immediate and long-term consequences from sun exposure. The objective of this review is to build awareness of the need of sun protection in pediatric rheumatology patients. RECENT FINDINGS Sun exposure can lead to disease exacerbations in many rheumatic diseases. There is well documented literature linking the chronic use of immunosuppressants with long-term risk of skin cancer. Although there is a lack of literature in pediatric rheumatology addressing the need of sun protection in this patient population, the young age of patients, the nature of their disease and the treatments they receive, make them a high-risk population for the effects of the sun. SUMMARY Sun protection recommendations are outlined in the following manuscript, backed up by the rationale and biology of why it is important for pediatric rheumatology patients to be protected from the sun. The information reviewed in this article should be part of the education that all pediatric rheumatology patients should receive as part of their care.
Collapse
|
27
|
Bernard JJ, Gallo RL, Krutmann J. Photoimmunology: how ultraviolet radiation affects the immune system. Nat Rev Immunol 2019; 19:688-701. [PMID: 31213673 DOI: 10.1038/s41577-019-0185-9] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2019] [Indexed: 02/07/2023]
Abstract
Ultraviolet (UV) radiation is a ubiquitous component of the environment that has important effects on a wide range of cell functions. Short-wavelength UVB radiation induces sunburn and is a potent immunomodulator, yet longer-wavelength, lower-energy UVA radiation also has effects on mammalian immunity. This Review discusses current knowledge regarding the mechanisms by which UV radiation can modify innate and adaptive immune responses and how this immunomodulatory capacity can be both beneficial in the case of inflammatory and autoimmune diseases, and detrimental in the case of skin cancer and the response to several infectious agents.
Collapse
Affiliation(s)
- Jamie J Bernard
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, USA. .,Division of Dermatology, Department of Medicine, Michigan State University, East Lansing, MI, USA.
| | - Richard L Gallo
- Department of Dermatology, University of California, San Diego, La Jolla, CA, USA
| | - Jean Krutmann
- IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany.,Medical Faculty, Heinrich Heine University, Duesseldorf, Germany
| |
Collapse
|
28
|
Mo X, Preston S, Zaidi MR. Macroenvironment-gene-microenvironment interactions in ultraviolet radiation-induced melanomagenesis. Adv Cancer Res 2019; 144:1-54. [PMID: 31349897 DOI: 10.1016/bs.acr.2019.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cutaneous malignant melanoma is one of the few major cancers that continue to exhibit a positive rate of increase in the developed world. A wealth of epidemiological data has undisputedly implicated ultraviolet radiation (UVR) from sunlight and artificial sources as the major risk factor for melanomagenesis. However, the molecular mechanisms of this cause-and-effect relationship remain murky and understudied. Recent efforts on multiple fronts have brought unprecedented expansion of our knowledge base on this subject and it is now clear that melanoma is caused by a complex interaction between genetic predisposition and environmental exposure, primarily to UVR. Here we provide an overview of the effects of the macroenvironment (UVR) on the skin microenvironment and melanocyte-specific intrinsic (mostly genetic) landscape, which conspire to produce one of the deadliest malignancies.
Collapse
Affiliation(s)
- Xuan Mo
- Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States
| | - Sarah Preston
- Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States
| | - M Raza Zaidi
- Fels Institute for Cancer Research and Molecular Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, United States.
| |
Collapse
|
29
|
Calzavara-Pinton P, Arisi M, Wolf P. Sunbeds and carcinogenesis: the need for new regulations and restrictions in Europe from the Euromelanoma perspective. J Eur Acad Dermatol Venereol 2019; 33 Suppl 2:104-109. [DOI: 10.1111/jdv.15314] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 09/20/2018] [Indexed: 12/27/2022]
Affiliation(s)
- P.G. Calzavara-Pinton
- Dermatology Department; University of Brescia; ASST Spedali Civili di Brescia; Brescia Italy
| | - M. Arisi
- Dermatology Department; University of Brescia; ASST Spedali Civili di Brescia; Brescia Italy
| | - P. Wolf
- Research Unit for Photodermatology; Department of Dermatology and Venereology; Medical University of Graz; Graz Austria
| |
Collapse
|
30
|
Travers JB, Weyerbacher J, Ocana JA, Borchers C, Rapp CM, Sahu RP. Acute Ethanol Exposure Augments Low-Dose UVB-Mediated Systemic Immunosuppression via Enhanced Production of Platelet-Activating Factor Receptor Agonists. J Invest Dermatol 2019; 139:1619-1622. [PMID: 30682347 DOI: 10.1016/j.jid.2018.11.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/27/2018] [Accepted: 11/28/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Jeffrey B Travers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, Ohio, USA; The Dayton Veterans Affairs Medical Center, Dayton, Ohio, USA.
| | - Jonathan Weyerbacher
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, Indianapolis, Indiana, USA
| | - Jesus A Ocana
- Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indianapolis, Indiana, USA
| | - Christina Borchers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, Ohio, USA
| | - Christine M Rapp
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, Ohio, USA
| | - Ravi P Sahu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, Ohio, USA
| |
Collapse
|
31
|
Lordan R, Tsoupras A, Zabetakis I. The Potential Role of Dietary Platelet-Activating Factor Inhibitors in Cancer Prevention and Treatment. Adv Nutr 2019; 10:148-164. [PMID: 30721934 PMCID: PMC6370273 DOI: 10.1093/advances/nmy090] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/11/2018] [Accepted: 10/10/2018] [Indexed: 12/11/2022] Open
Abstract
Cancer is the second leading cause of mortality worldwide. The role of unresolved inflammation in cancer progression and metastasis is well established. Platelet-activating factor (PAF) is a key proinflammatory mediator in the initiation and progression of cancer. Evidence suggests that PAF is integral to suppression of the immune system and promotion of metastasis and tumor growth by altering local angiogenic and cytokine networks. Interactions between PAF and its receptor may have a role in various digestive, skin, and hormone-dependent cancers. Diet plays a critical role in the prevention of cancer and its treatment. Research indicates that the Mediterranean diet may reduce the incidence of several cancers in which dietary PAF inhibitors have a role. Dietary PAF inhibitors such as polar lipids have demonstrated inhibitory effects against the physiological actions of PAF in cancer and other chronic inflammatory conditions in vitro and in vivo. In addition, experimental models of radiotherapy and chemotherapy demonstrate that inhibition of PAF as adjuvant therapy may lead to more favorable outcomes. Although promising, there is limited evidence on the potential benefits of dietary PAF inhibitors on cancer prevention or treatment. Therefore, further extensive research is required to assess the effects of various dietary factors and PAF inhibitors and to elucidate the mechanisms in prevention of cancer progression and metastasis at a molecular level.
Collapse
Affiliation(s)
- Ronan Lordan
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Alexandros Tsoupras
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| | - Ioannis Zabetakis
- Department of Biological Sciences, University of Limerick, Limerick, Ireland
| |
Collapse
|
32
|
da Silva Junior IA, Andrade LNDS, Jancar S, Chammas R. Platelet activating factor receptor antagonists improve the efficacy of experimental chemo- and radiotherapy. Clinics (Sao Paulo) 2018; 73:e792s. [PMID: 30328954 PMCID: PMC6157068 DOI: 10.6061/clinics/2018/e792s] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/16/2018] [Indexed: 12/12/2022] Open
Abstract
Platelet activating factor is a lipid mediator of inflammation, and in recent decades, it has emerged as an important factor in tumor outcomes. Platelet activating factor acts by specific binding to its receptor, which is present in both tumor cells and cells that infiltrate tumors. Pro-tumorigenic effects of platelet activating factor receptor in tumors includes promotion of tumor cell proliferation, production of survival signals, migration of vascular cells and formation of new vessels and stimulation of dendritic cells and macrophages suppressor phenotype. In experimental models, blocking of platelet activating factor receptor reduced tumor growth and increased animal survival. During chemotherapy and radiotherapy, tumor cells that survive treatment undergo accelerated proliferation, a phenomenon known as tumor cell repopulation. Work from our group and others showed that these treatments induce overproduction of platelet activating factor-like molecules and increase expression of its receptor in tumor cells. In this scenario, antagonists of platelet activating factor markedly reduced tumor repopulation. Here, we note that combining chemo- and radiotherapy with platelet activating factor antagonists could be a promising strategy for cancer treatment.
Collapse
Affiliation(s)
- Ildefonso Alves da Silva Junior
- Departamento de Imunologia, Instituto de Ciencias Biomedicas, Universidade de Sao Paulo, Laboratorio de Imunofarmacologia, Sao Paulo, SP, BR
- *Corresponding author. E-mail:
| | - Luciana Nogueira de Sousa Andrade
- Laboratorio de Oncologia Experimental, Centro de Investigacao Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| | - Sonia Jancar
- Departamento de Imunologia, Instituto de Ciencias Biomedicas, Universidade de Sao Paulo, Laboratorio de Imunofarmacologia, Sao Paulo, SP, BR
| | - Roger Chammas
- Laboratorio de Oncologia Experimental, Centro de Investigacao Translacional em Oncologia, Instituto do Cancer do Estado de Sao Paulo (ICESP), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR
| |
Collapse
|
33
|
Romer E, Thyagarajan A, Krishnamurthy S, Rapp CM, Liu L, Fahy K, Awoyemi A, Sahu RP. Systemic Platelet-Activating Factor-Receptor Agonism Enhances Non-Melanoma Skin Cancer Growth. Int J Mol Sci 2018; 19:ijms19103109. [PMID: 30314274 PMCID: PMC6212876 DOI: 10.3390/ijms19103109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/01/2018] [Accepted: 10/04/2018] [Indexed: 12/27/2022] Open
Abstract
Platelet-activating factor-receptor (PAF-R) agonists are pleiotropic lipid factors that influence multiple biological processes, including the induction and resolution of inflammation as well as immunosuppression. PAF-R agonists have been shown to modulate tumorigenesis and/or tumor growth in various skin cancer models by suppressing either cutaneous inflammation and/or anti-tumoral adaptive immunity. We have previously shown that a chronic systemic PAF-R agonist administration of mice enhances the growth of subcutaneously implanted melanoma tumors. Conversely, chronic topical applications of a PAF-R agonist suppressed non-melanoma skin cancer (NMSC) in a topical chemical carcinogenesis model (dimethylbenz[a]anthracene/phorbol 12-myristate 13-acetate (DMBA/PMA)) in-part via anti-inflammatory effects. These results indicate that the context of PAF-R agonist exposure via either chronic cutaneous or systemic administration, result in seemingly disparate effects on tumor promotion. To further dissect the contextual role of PAF-R agonism on tumorigenesis, we chronically administered systemic PAF-R agonist, carbamoyl-PAF (CPAF) to mice under a cutaneous chemical carcinogenesis protocol, recently characterized to initiate both NMSC and melanocytic nevus formation that can progress to malignant melanoma. Our results showed that while systemic CPAF did not modulate melanocytic nevus formation, it enhanced the growth of NMSC tumors.
Collapse
Affiliation(s)
- Eric Romer
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University; Dayton, OH 45435, USA.
| | - Anita Thyagarajan
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University; Dayton, OH 45435, USA.
| | - Smita Krishnamurthy
- Department of Pathology and Dermatology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA.
| | - Christine M Rapp
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University; Dayton, OH 45435, USA.
| | - Langni Liu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University; Dayton, OH 45435, USA.
| | - Katherine Fahy
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University; Dayton, OH 45435, USA.
| | - Azeezat Awoyemi
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University; Dayton, OH 45435, USA.
| | - Ravi P Sahu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University; Dayton, OH 45435, USA.
| |
Collapse
|
34
|
Vieyra-Garcia PA, Wolf P. From Early Immunomodulatory Triggers to Immunosuppressive Outcome: Therapeutic Implications of the Complex Interplay Between the Wavebands of Sunlight and the Skin. Front Med (Lausanne) 2018; 5:232. [PMID: 30250844 PMCID: PMC6139367 DOI: 10.3389/fmed.2018.00232] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/30/2018] [Indexed: 12/20/2022] Open
Abstract
Phototherapy is an efficient treatment for many cutaneous diseases that involve the activation of inflammatory pathways or the overgrowth of cells with aberrant phenotype. In this review, we discuss recent advances in photoimmunology, focusing on the effects of UV-based therapies currently used in dermatology. We describe the molecular responses to the main forms of photo(chemo)therapy such as UVB, UVA-1, and PUVA that include the triggering of apoptotic or immunosuppressive pathways and help to clear diseased skin. The early molecular response to UV involves DNA photoproducts, the isomerization of urocanic acid, the secretion of biophospholipids such as platelet activating factor (PAF), the activation of aryl hydrocarbon receptor and inflammasome, and vitamin D synthesis. The simultaneous and complex interaction of these events regulates the activity of the immune system both locally and systemically, resulting in apoptosis of neoplastic and/or benign cells, reduction of cellular infiltrate, and regulation of cytokines and chemokines. Regulatory T-cells and Langerhans cells, among other skin-resident cellular populations, are deeply affected by UV exposure and are therefore important players in the mechanisms of immunomodulation and the therapeutic value of UV in all its forms. We weigh the contribution of these cells to the therapeutic application of UV and how they may participate in transferring the direct impact of UV on the skin into local and systemic immunomodulation. Moreover, we review the therapeutic mechanisms revealed by clinical and laboratory animal investigations in the most common cutaneous diseases treated with phototherapy such as psoriasis, atopic dermatitis, vitiligo, and cutaneous T-cell lymphoma. Better understanding of phototherapeutic mechanisms in these diseases will help advance treatment in general and make future therapeutic strategies more precise, targeted, personalized, safe, and efficient.
Collapse
Affiliation(s)
| | - Peter Wolf
- Department of Dermatology, Medical University of Graz, Graz, Austria
| |
Collapse
|
35
|
Hyland IK, O'Toole RF, Smith JA, Bissember AC. Progress in the Development of Platelet-Activating Factor Receptor (PAFr) Antagonists and Applications in the Treatment of Inflammatory Diseases. ChemMedChem 2018; 13:1873-1884. [DOI: 10.1002/cmdc.201800401] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/08/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Isabel K. Hyland
- School of Natural Sciences Chemistry; University of Tasmania; Hobart Australia
| | | | - Jason A. Smith
- School of Natural Sciences Chemistry; University of Tasmania; Hobart Australia
| | - Alex C. Bissember
- School of Natural Sciences Chemistry; University of Tasmania; Hobart Australia
| |
Collapse
|
36
|
Galtier d'Auriac I, Quinn RA, Maughan H, Nothias LF, Little M, Kapono CA, Cobian A, Reyes BT, Green K, Quistad SD, Leray M, Smith JE, Dorrestein PC, Rohwer F, Deheyn DD, Hartmann AC. Before platelets: the production of platelet-activating factor during growth and stress in a basal marine organism. Proc Biol Sci 2018; 285:rspb.2018.1307. [PMID: 30111600 PMCID: PMC6111180 DOI: 10.1098/rspb.2018.1307] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/20/2018] [Indexed: 11/17/2022] Open
Abstract
Corals and humans represent two extremely disparate metazoan lineages and are therefore useful for comparative evolutionary studies. Two lipid-based molecules that are central to human immunity, platelet-activating factor (PAF) and Lyso-PAF were recently identified in scleractinian corals. To identify processes in corals that involve these molecules, PAF and Lyso-PAF biosynthesis was quantified in conditions known to stimulate PAF production in mammals (tissue growth and exposure to elevated levels of ultraviolet light) and in conditions unique to corals (competing with neighbouring colonies over benthic space). Similar to observations in mammals, PAF production was higher in regions of active tissue growth and increased when corals were exposed to elevated levels of ultraviolet light. PAF production also increased when corals were attacked by the stinging cells of a neighbouring colony, though only the attacked coral exhibited an increase in PAF. This reaction was observed in adjacent areas of the colony, indicating that this response is coordinated across multiple polyps including those not directly subject to the stress. PAF and Lyso-PAF are involved in coral stress responses that are both shared with mammals and unique to the ecology of cnidarians.
Collapse
Affiliation(s)
| | - Robert A Quinn
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, CA 92093, USA
| | | | - Louis-Felix Nothias
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, CA 92093, USA
| | - Mark Little
- Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA
| | - Clifford A Kapono
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, CA 92093, USA
| | - Ana Cobian
- Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA
| | - Brandon T Reyes
- Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA
| | - Kevin Green
- Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA
| | - Steven D Quistad
- Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA.,Laboratoire de Génétique de l'Evolution (LGE), Institute of Chemistry, Biology, and Innovation, ESPCI ParisTech/CNRS UMR 8231/PSL Research University, Paris, France
| | - Matthieu Leray
- Smithsonian Tropical Research Institute, Smithsonian Institution, Panama City, Republic of Panama
| | - Jennifer E Smith
- Scripps Institution of Oceanography, University of California, San Diego, CA 92093, USA
| | - Pieter C Dorrestein
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, CA 92093, USA
| | - Forest Rohwer
- Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA
| | - Dimitri D Deheyn
- Scripps Institution of Oceanography, University of California, San Diego, CA 92093, USA
| | - Aaron C Hartmann
- Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA .,National Museum of Natural History, Smithsonian Institution, Washington, DC, USA
| |
Collapse
|
37
|
Harrison KA, Romer E, Weyerbacher J, Ocana JA, Sahu RP, Murphy RC, Kelly LE, Smith TA, Rapp CM, Borchers C, Cool DR, Li G, Simman R, Travers JB. Enhanced Platelet-Activating Factor Synthesis Facilitates Acute and Delayed Effects of Ethanol-Intoxicated Thermal Burn Injury. J Invest Dermatol 2018; 138:2461-2469. [PMID: 29857067 DOI: 10.1016/j.jid.2018.04.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 04/06/2018] [Accepted: 04/20/2018] [Indexed: 02/07/2023]
Abstract
Thermal burn injuries in patients who are alcohol-intoxicated result in greater morbidity and mortality. Murine models combining ethanol and localized thermal burn injury reproduce the systemic toxicity seen in human subjects, which consists of both acute systemic cytokine production with multiple organ dysfunction, as well as a delayed systemic immunosuppression. However, the exact mechanisms for these acute and delayed effects are unclear. These studies sought to define the role of the lipid mediator platelet-activating factor in the acute and delayed effects of intoxicated burn injury. Combining ethanol and thermal burn injury resulted in increased enzymatic platelet-activating factor generation in a keratinocyte cell line in vitro, human skin explants ex vivo, as well as in murine skin in vivo. Further, the acute increase in inflammatory cytokines, such as IL-6, and the systemic immunosuppressive effects of intoxicated thermal burn injury were suppressed in mice lacking platelet-activating factor receptors. Together, these studies provide a potential mechanism and treatment strategies for the augmented toxicity and immunosuppressive effects of thermal burn injury in the setting of acute ethanol exposure, which involves the pleotropic lipid mediator platelet-activating factor.
Collapse
Affiliation(s)
- Kathleen A Harrison
- Department of Pharmacology, University of Colorado Health Sciences Center, Aurora, Colorado, USA
| | - Eric Romer
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA
| | - Jonathan Weyerbacher
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Jesus A Ocana
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Ravi P Sahu
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA
| | - Robert C Murphy
- Department of Pharmacology, University of Colorado Health Sciences Center, Aurora, Colorado, USA
| | - Lisa E Kelly
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA
| | - Townsend A Smith
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA
| | - Christine M Rapp
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA
| | - Christina Borchers
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA
| | - David R Cool
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA
| | - Gengxin Li
- Department of Mathematics and Statistics, Wright State University, Dayton, Ohio, USA
| | - Richard Simman
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA; Department of Dermatology, Wright State University, Dayton, Ohio, USA
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology, Wright State University, Dayton, Ohio, USA; Department of Dermatology, Wright State University, Dayton, Ohio, USA; The Dayton VA Medical Center, Dayton, OH.
| |
Collapse
|
38
|
Ocana JA, Romer E, Sahu R, Pawelzik SC, FitzGerald GA, Kaplan MH, Travers JB. Platelet-Activating Factor-Induced Reduction in Contact Hypersensitivity Responses Is Mediated by Mast Cells via Cyclooxygenase-2-Dependent Mechanisms. THE JOURNAL OF IMMUNOLOGY 2018; 200:4004-4011. [PMID: 29695417 DOI: 10.4049/jimmunol.1701145] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 04/05/2018] [Indexed: 12/15/2022]
Abstract
Platelet-activating factor (PAF) stimulates numerous cell types via activation of the G protein-coupled PAF receptor (PAFR). PAFR activation not only induces acute proinflammatory responses, but it also induces delayed systemic immunosuppressive effects by modulating host immunity. Although enzymatic synthesis and degradation of PAF are tightly regulated, oxidative stressors, such as UVB, chemotherapy, and cigarette smoke, can generate PAF and PAF-like molecules in an unregulated fashion via the oxidation of membrane phospholipids. Recent studies have demonstrated the relevance of the mast cell (MC) PAFR in PAFR-induced systemic immunosuppression. The current study was designed to determine the exact mechanisms and mediators involved in MC PAFR-mediated systemic immunosuppression. By using a contact hypersensitivity model, the MC PAFR was not only found to be necessary, but also sufficient to mediate the immunosuppressive effects of systemic PAF. Furthermore, activation of the MC PAFR induces MC-derived histamine and PGE2 release. Importantly, PAFR-mediated systemic immunosuppression was defective in mice that lacked MCs, or in MC-deficient mice transplanted with histidine decarboxylase- or cyclooxygenase-2-deficient MCs. Lastly, it was found that PGs could modulate MC migration to draining lymph nodes. These results support the hypothesis that MC PAFR activation promotes the immunosuppressive effects of PAF in part through histamine- and PGE2-dependent mechanisms.
Collapse
Affiliation(s)
- Jesus A Ocana
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Eric Romer
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435
| | - Ravi Sahu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435
| | - Sven-Christian Pawelzik
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA 19104
| | - Garret A FitzGerald
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA 19104
| | - Mark H Kaplan
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435; .,Department of Dermatology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435; and.,Dayton Veterans Affairs Medical Center, Dayton, OH 45428
| |
Collapse
|
39
|
Malavige GN, Wijewickrama A, Fernando S, Jeewandara C, Ginneliya A, Samarasekara S, Madushanka P, Punchihewa C, Paranavitane S, Idampitiya D, Wanigatunga C, Dissanayake H, Prathapan S, Gomes L, Aman SAB, John AS, Ogg GS. A preliminary study on efficacy of rupatadine for the treatment of acute dengue infection. Sci Rep 2018; 8:3857. [PMID: 29497121 PMCID: PMC5832788 DOI: 10.1038/s41598-018-22285-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 02/19/2018] [Indexed: 12/15/2022] Open
Abstract
Currently there are no specific treatments available for acute dengue infection. We considered that rupatadine, a platelet-activating factor receptor inhibitor, might modulate dengue-associated vascular leak. The effects of rupatadine were assessed in vitro, and in a dengue model, which showed that rupatadine significantly reduced endothelial permeability by dengue sera in vitro, and significantly inhibited the increased haematocrit in dengue-infected mice with dose-dependency. We conducted a randomised, placebo-controlled trial in 183 adult patients in Sri Lanka with acute dengue, which showed that rupatadine up to 40 mg daily appeared safe and well-tolerated with similar proportions of adverse events with rupatadine and placebo. Although the primary end-point of a significant reduction in fluid leakage (development of pleural effusions or ascites) was not met, post-hoc analyses revealed small but significant differences in several parameters on individual illness days - higher platelet counts and lower aspartate-aminotransferase levels on day 7 in the rupatadine group compared to the placebo group, and smaller effusions on day 8 in the subgroup of patients with pleural effusions. However, due to the small sample size and range of recruitment time, the potential beneficial effects of rupatadine require further evaluation in large studies focused on recruitment during the early febrile phase.
Collapse
Affiliation(s)
- Gathsaurie Neelika Malavige
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka.
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK.
| | | | - Samitha Fernando
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Chandima Jeewandara
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Anushka Ginneliya
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Supun Samarasekara
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Praveen Madushanka
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Chameera Punchihewa
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Shiran Paranavitane
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | | | - Chandanie Wanigatunga
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Harsha Dissanayake
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Shamini Prathapan
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Laksiri Gomes
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
| | - Siti A B Aman
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
| | - Ashley St John
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
- Department of Pathology, Duke University, Duke, USA
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Graham S Ogg
- Centre for Dengue Research, Faculty of Medical Sciences, University of Sri Jayawardenapura, Jayawardenapura, Sri Lanka
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK
| |
Collapse
|
40
|
Liu X, Huang H, Gao H, Wu X, Zhang W, Yu B, Dou X. Regulatory B cells induced by ultraviolet B through toll-like receptor 4 signalling contribute to the suppression of contact hypersensitivity responses in mice. Contact Dermatitis 2018; 78:117-130. [PMID: 29205369 DOI: 10.1111/cod.12913] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 09/23/2017] [Accepted: 09/24/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Ultraviolet (UV) B irradiation is known to suppress contact hypersensitivity (CHS) responses in mouse models by suppressing immune responses. However, the cellular mechanisms responsible for UVB-induced systemic suppression remain unclear. Regulatory B cells have been reported to play an inhibitory role during CHS. It is presently unknown whether regulatory B cells contribute to the effect of UVB phototherapy. OBJECTIVE To investigate the inductive effect of UVB on regulatory B cells and the underlying mechanisms by using a CHS mouse model. METHODS CHS was induced with oxazolone, and evaluated by histopathology, flow cytometry, and quantitative real-time polymerase chain reaction. RESULT We found that UVB irradiation induced regulatory B cell expansion and ameliorated CHS. UVB-induced regulatory B cells contribute to systemic immunosuppression by inhibiting the proliferation of T cells. Moreover, we determined that toll-like receptor (TLR) 4, the expression of which was upregulated in B cells after UVB exposure, played an essential role in the induction of regulatory B cells. CONCLUSION Our data identified regulatory B cells as regulators of UVB-induced immunosuppression in CHS, and suggest the importance of the UVB-TLR4 axis in the generation of regulatory B cells.
Collapse
Affiliation(s)
- Xiaoming Liu
- Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - the Hong Kong University of Science and Technology Medical Centre, Shenzhen, 518036, China
- Department of Dermatology and Venereology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Haiyan Huang
- Department of Dermatology and Venereology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Hongbin Gao
- Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - the Hong Kong University of Science and Technology Medical Centre, Shenzhen, 518036, China
- Department of Dermatology and Venereology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Xia Wu
- Department of Dermatology and Venereology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
- Postgraduate School, Guangzhou Medical University, Guangzhou, 511436, China
| | - Wei Zhang
- Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - the Hong Kong University of Science and Technology Medical Centre, Shenzhen, 518036, China
| | - Bo Yu
- Shenzhen Key Laboratory for Translational Medicine of Dermatology, Shenzhen Peking University - the Hong Kong University of Science and Technology Medical Centre, Shenzhen, 518036, China
- Department of Dermatology and Venereology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Xia Dou
- Department of Dermatology and Venereology, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| |
Collapse
|
41
|
Sahu RP, Harrison KA, Weyerbacher J, Murphy RC, Konger RL, Garrett JE, Chin-Sinex HJ, Johnston ME, Dynlacht JR, Mendonca M, McMullen K, Li G, Spandau DF, Travers JB. Radiation therapy generates platelet-activating factor agonists. Oncotarget 2018; 7:20788-800. [PMID: 26959112 PMCID: PMC4991492 DOI: 10.18632/oncotarget.7878] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 02/06/2016] [Indexed: 01/22/2023] Open
Abstract
Pro-oxidative stressors can suppress host immunity due to their ability to generate oxidized lipid agonists of the platelet-activating factor-receptor (PAF-R). As radiation therapy also induces reactive oxygen species, the present studies were designed to define whether ionizing radiation could generate PAF-R agonists and if these lipids could subvert host immunity. We demonstrate that radiation exposure of multiple tumor cell lines in-vitro, tumors in-vivo, and human subjects undergoing radiation therapy for skin tumors all generate PAF-R agonists. Structural characterization of radiation-induced PAF-R agonistic activity revealed PAF and multiple oxidized glycerophosphocholines that are produced non-enzymatically. In a murine melanoma tumor model, irradiation of one tumor augmented the growth of the other (non-treated) tumor in a PAF-R-dependent process blocked by a cyclooxygenase-2 inhibitor. These results indicate a novel pathway by which PAF-R agonists produced as a byproduct of radiation therapy could result in tumor treatment failure, and offer important insights into potential therapeutic strategies that could improve the overall antitumor effectiveness of radiation therapy regimens.
Collapse
Affiliation(s)
- Ravi P Sahu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, USA
| | - Kathleen A Harrison
- Department of Pharmacology, University of Colorado Health Sciences Center, Aurora, CO, USA
| | - Jonathan Weyerbacher
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Robert C Murphy
- Department of Pharmacology, University of Colorado Health Sciences Center, Aurora, CO, USA
| | - Raymond L Konger
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Joy Elizabeth Garrett
- Department of Radiation Oncology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Helen Jan Chin-Sinex
- Department of Radiation Oncology, Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Joseph R Dynlacht
- Department of Radiation Oncology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Marc Mendonca
- Department of Radiation Oncology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Kevin McMullen
- Department of Radiation Oncology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Gengxin Li
- Department of Biostatistics, Wright State University, Dayton, OH, USA
| | - Dan F Spandau
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Jeffrey B Travers
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, USA.,Department of Dermatology, Indiana University School of Medicine, Indianapolis, IN, USA.,The Dayton V.A. Medical Center, Dayton, OH, USA
| |
Collapse
|
42
|
Bochkov V, Gesslbauer B, Mauerhofer C, Philippova M, Erne P, Oskolkova OV. Pleiotropic effects of oxidized phospholipids. Free Radic Biol Med 2017; 111:6-24. [PMID: 28027924 DOI: 10.1016/j.freeradbiomed.2016.12.034] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/21/2016] [Accepted: 12/22/2016] [Indexed: 12/25/2022]
Abstract
Oxidized phospholipids (OxPLs) are increasingly recognized to play a role in a variety of normal and pathological states. OxPLs were implicated in regulation of inflammation, thrombosis, angiogenesis, endothelial barrier function, immune tolerance and other important processes. Rapidly accumulating evidence suggests that OxPLs are biomarkers of atherosclerosis and other pathologies. In addition, successful application of experimental drugs based on structural scaffold of OxPLs in animal models of inflammation was recently reported. This review briefly summarizes current knowledge on generation, methods of quantification and biological activities of OxPLs. Furthermore, receptor and cellular mechanisms of these effects are discussed. The goal of the review is to give a broad overview of this class of lipid mediators inducing pleiotropic biological effects.
Collapse
Affiliation(s)
- Valery Bochkov
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Austria.
| | - Bernd Gesslbauer
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Austria
| | - Christina Mauerhofer
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Austria
| | - Maria Philippova
- Signaling Laboratory, Department of Biomedicine, Basel University Hospital, Basel, Switzerland
| | - Paul Erne
- Signaling Laboratory, Department of Biomedicine, Basel University Hospital, Basel, Switzerland
| | - Olga V Oskolkova
- Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Austria.
| |
Collapse
|
43
|
Malavige GN, Ogg GS. Pathogenesis of vascular leak in dengue virus infection. Immunology 2017; 151:261-269. [PMID: 28437586 DOI: 10.1111/imm.12748] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 03/26/2017] [Accepted: 04/17/2017] [Indexed: 12/31/2022] Open
Abstract
Endothelial dysfunction leading to vascular leak is the hallmark of severe dengue. Vascular leak typically becomes clinically evident 3-6 days after the onset of illness, which is known as the critical phase. This critical phase follows the period of peak viraemia, and lasts for 24-48 hr and usually shows rapid and complete reversal, suggesting that it is likely to occur as a result of inflammatory mediators, rather than infection of the endothelium. Cytokines such as tumour necrosis factor-α, which are known to be elevated in the critical phase of dengue, are likely to be contributing factors. Dengue NS1, a soluble viral protein, has also been shown to disrupt the endothelial glycocalyx and thus contribute to vascular leak, although there appears to be a discordance between the timing of NS1 antigenaemia and occurrence of vascular leak. In addition, many inflammatory lipid mediators are elevated in acute dengue viral infection such as platelet activating factor (PAF) and leukotrienes. Furthermore, many other inflammatory mediators such as vascular endothelial growth factor and angiopoietin-2 have been shown to be elevated in patients with dengue haemorrhagic fever, exerting their action in part by inducing the activity of phospholipases, which have diverse inflammatory effects including generation of PAF. Platelets have also been shown to significantly contribute to endothelial dysfunction by production of interleukin-1β through activation of the NLRP3 inflammasome and also by inducing production of inflammatory cytokines by monocytes. Drugs that block down-stream immunological mediator pathways such as PAF may also be beneficial in the treatment of severe disease.
Collapse
Affiliation(s)
- Gathsaurie Neelika Malavige
- Centre for Dengue Research, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.,MRC Human Immunology Unit, Radcliffe Department of Medicine, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Graham S Ogg
- MRC Human Immunology Unit, Radcliffe Department of Medicine, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| |
Collapse
|
44
|
Fahy K, Liu L, Rapp CM, Borchers C, Bihl JC, Chen Y, Simman R, Travers JB. UVB-generated Microvesicle Particles: A Novel Pathway by Which a Skin-specific Stimulus Could Exert Systemic Effects. Photochem Photobiol 2017; 93:937-942. [PMID: 28039861 DOI: 10.1111/php.12703] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 11/03/2016] [Indexed: 12/29/2022]
Abstract
Ultraviolet B radiation (UVB) exerts profound effects on human skin. Much is known regarding the ability of UVB to generate a plethora of bioactive agents ranging from cytokines and other bioactive proteins, lipid mediators and microRNAs. It is presumed that these agents are in large part responsible for the effects of UVB, which is only absorbed appreciably in the epidermis. However, the exact mechanism by which these bioactive agents can leave the epidermis are as yet unclear. This review addresses the potential role of microvesicle particles (MVP) as UVB signaling agents through transmitting biologic mediators. New data are provided that UVB treatment of human skin explants also generates MVP production. We hypothesize that UVB production of MVPs (UVB-MVP) could serve this important function of transmitting keratinocyte-derived bioactive agents. Moreover, we propose that UVB-MVP formation involves the lipid mediator platelet-activating factor. This novel pathway has the potential to be exploited pharmacologically to modulate UVB effects.
Collapse
Affiliation(s)
- Katherine Fahy
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH
| | - Langni Liu
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH
| | - Christine M Rapp
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH
| | - Christina Borchers
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH
| | - Ji C Bihl
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH
| | - Yanfang Chen
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH
| | - Richard Simman
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH.,Department of Dermatology, Boonshoft School of Medicine, Wright State University, Dayton, OH
| | - Jeffrey B Travers
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH.,Department of Dermatology, Boonshoft School of Medicine, Wright State University, Dayton, OH.,Dayton V.A. Medical Center, Dayton, OH
| |
Collapse
|
45
|
Damiani E, Puebla-Osorio N, Lege BM, Liu J, Neelapu SS, Ullrich SE. Platelet activating factor-induced expression of p21 is correlated with histone acetylation. Sci Rep 2017; 7:41959. [PMID: 28157211 PMCID: PMC5291204 DOI: 10.1038/srep41959] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 12/30/2016] [Indexed: 02/07/2023] Open
Abstract
Ultraviolet (UV)-irradiated keratinocytes secrete the lipid mediator of inflammation, platelet-activating factor (PAF). PAF plays an essential role in UV-induced immune suppression and skin cancer induction. Dermal mast cell migration from the skin to the draining lymph nodes plays a prominent role in activating systemic immune suppression. UV-induced PAF activates mast cell migration by up-regulating mast cell CXCR4 surface expression. Recent findings indicate that PAF up-regulates CXCR4 expression via histone acetylation. UV-induced PAF also activates cell cycle arrest and disrupts DNA repair, in part by increasing p21 expression. Do epigenetic alterations play a role in p21 up-regulation? Here we show that PAF increases Acetyl-CREB-binding protein (CBP/p300) histone acetyltransferase expression in a time and dose-dependent fashion. Partial deletion of the HAT domain in the CBP gene, blocked these effects. Chromatin immunoprecipitation assays indicated that PAF-treatment activated the acetylation of the p21 promoter. PAF-treatment had no effect on other acetylating enzymes (GCN5L2, PCAF) indicating it is not a global activator of histone acetylation. This study provides further evidence that PAF activates epigenetic mechanisms to affect important cellular processes, and we suggest this bioactive lipid can serve as a link between the environment and the epigenome.
Collapse
Affiliation(s)
- Elisabetta Damiani
- Dipartimento di Scienze della Vita e dell'Ambiente, Universita' Politecnica delle Marche, Ancona, Italy
| | - Nahum Puebla-Osorio
- Department of Lymphoma and Myeloma, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Bree M Lege
- Department of Lymphoma and Myeloma, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Jingwei Liu
- Department of Lymphoma and Myeloma, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Sattva S Neelapu
- Department of Lymphoma and Myeloma, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| | - Stephen E Ullrich
- Department of Immunology and The Center for Cancer Immunology Research, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.,The University of Texas Graduate School for Biomedical Sciences at Houston, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
| |
Collapse
|
46
|
Noh KT, Jung ID, Cha GS, Han MK, Park YM. Platelet-activating Factor Mediates Endotoxin Tolerance by Regulating Indoleamine 2,3-Dioxygenase-dependent Expression of the Suppressor of Cytokine Signaling 3. J Biol Chem 2017; 292:3290-3298. [PMID: 28077574 DOI: 10.1074/jbc.m116.764464] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 12/25/2016] [Indexed: 11/06/2022] Open
Abstract
Indoleamine 2,3-dioxygenase (IDO) mediates immune tolerance, and suppressor of cytokine signaling 3 (SOCS3) negatively regulates the JAK/STAT signal transduction pathway. We determined previously that platelet-activating factor (PAF) protects mice against LPS-induced endotoxic shock, but its detailed mechanism of action was unknown. We performed survival experiments in IDO+/+ and IDO-/- mice using an LPS-induced endotoxemia model and rated organ injury (neutrophil infiltration and liver function). Using ELISA and Western blotting, we also investigated the mechanism of PAF-mediated endotoxin tolerance during endotoxemia. PAF-mediated endotoxin tolerance was dependent on IDO in vivo and in vitro and was not observed in IDO-/- mice. JAK/STAT signaling, crucial for SOCS3 expression, was also impaired in the absence of IDO. In an IDO- and STAT-dependent manner, PAF mediated a decrease in IL-12 and a dramatic increase in IL-10 and reduced mouse mortality. In addition, PAF attenuated LPS-mediated neutrophil infiltration into the lungs and interactions between neutrophil-like (THP-1) and endothelial cells (human umbilical vein endothelial cells). These results indicate that PAF-mediated endotoxin tolerance is initiated via IDO- and JAK/STAT-dependent expression of SOCS3. Our study has revealed a novel tolerogenic mechanism of IDO action and an important association between IDO and SOCS3 with respect to endotoxin tolerance.
Collapse
Affiliation(s)
- Kyung Tae Noh
- Department of Infectious Diseases, Armed Forces Medical Research Institute, 90bun, Jaunro, Yuseong-gu, Daejeon 305-878, South Korea
| | - In Duk Jung
- Department of Immunology, College of Medicine, Konkuk University, Seoul 143-701, South Korea
| | - Gil Sun Cha
- Department of Immunology, College of Medicine, Konkuk University, Seoul 143-701, South Korea
| | - Myung-Kwan Han
- Department of Microbiology, Chonbuk National University Medical School, Jeonju 561-182, South Korea.
| | - Yeong-Min Park
- Department of Immunology, College of Medicine, Konkuk University, Seoul 143-701, South Korea.
| |
Collapse
|
47
|
Christensen L, Suggs A, Baron E. Ultraviolet Photobiology in Dermatology. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 996:89-104. [PMID: 29124693 DOI: 10.1007/978-3-319-56017-5_8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
The effects of ultraviolet radiation on human skin have been studied for years, and both its harmful and therapeutic effects are well known. Exposure to UV light can lead to sunburn, immunosuppression, skin aging, and carcinogenesis, and photoprotection is strongly advocated. However, when used under controlled conditions, UV radiation can also be helpful in the diagnosis and treatment of many skin conditions.
Collapse
Affiliation(s)
- Luisa Christensen
- Department of Dermatology, UH Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, OH, 44106, USA.
| | - Amanda Suggs
- Department of Dermatology, UH Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Elma Baron
- Department of Dermatology, UH Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, OH, 44106, USA
| |
Collapse
|
48
|
Thyagarajan A, Sahu RP. Implications of Aspirin for Melanoma Treatment: A Short Perspective. JOURNAL OF MOLECULAR GENETICS AND MEDICINE 2017; 1:2. [PMID: 34927173 PMCID: PMC8681500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Several human cancers including melanoma exhibit increased expression of inflammatory cyclooxygenases (COX) enzymes that catalyze the conversion of arachidonic acid to prostaglandins (PGs) implicated in tumor growth. As aspirin has been used in the treatment of various ailments including inflammatory diseases, and cancers due to its anti-inflammatory property via inhibiting COX enzymes its significance particularly in reducing the risk of advanced stage or metastatic melanoma has yielded mixed responses. This mini review addresses some of the discrepancies of implications of aspirin from preclinical and clinical studies, and recent updates into its mechanisms of actions in melanoma treatment.
Collapse
|
49
|
Boosting Adaptive Immunity: A New Role for PAFR Antagonists. Sci Rep 2016; 6:39146. [PMID: 27966635 PMCID: PMC5155422 DOI: 10.1038/srep39146] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 11/18/2016] [Indexed: 02/02/2023] Open
Abstract
We have previously shown that the Platelet-Activating Factor Receptor (PAFR) engagement in murine macrophages and dendritic cells (DCs) promotes a tolerogenic phenotype reversed by PAFR-antagonists treatment in vitro. Here, we investigated whether a PAFR antagonist would modulate the immune response in vivo. Mice were subcutaneously injected with OVA or OVA with PAFR-antagonist WEB2170 on days 0 and 7. On day 14, OVA–specific IgG2a and IgG1 were measured in the serum. The presence of WEB2170 during immunization significantly increased IgG2a without affecting IgG1 levels. When WEB2170 was added to OVA in complete Freund’s adjuvant, enhanced IgG2a but not IgG1 production was also observed, and CD4+ FoxP3+ T cell frequency in the spleen was reduced compared to mice immunized without the antagonist. Similar results were observed in PAFR-deficient mice, along with increased Tbet mRNA expression in the spleen. Additionally, bone marrow-derived DCs loaded with OVA were transferred into naïve mice and their splenocytes were co-cultured with fresh OVA-loaded DCs. CD4+ T cell proliferation was higher in the group transferred with DCs treated with the PAFR-antagonist. We propose that the activation of PAFR by ligands present in the site of immunization is able to fine-tune the adaptive immune response.
Collapse
|
50
|
Kamaladasa A, Gomes L, Jeewandara C, Shyamali N, Ogg GS, Malavige GN. Lipopolysaccharide acts synergistically with the dengue virus to induce monocyte production of platelet activating factor and other inflammatory mediators. Antiviral Res 2016; 133:183-90. [DOI: 10.1016/j.antiviral.2016.07.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 07/24/2016] [Indexed: 01/19/2023]
|