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Wahid HH, Anahar FN, Isahak NH, Mohd Zoharodzi J, Mohammad Khoiri SNL, Mohamad Zainal NH, Kamarudin N, Ismail H, Mustafa Mahmud MIA. Role of Platelet Activating Factor as a Mediator of Inflammatory Diseases and Preterm Delivery. THE AMERICAN JOURNAL OF PATHOLOGY 2024; 194:862-878. [PMID: 38403163 DOI: 10.1016/j.ajpath.2024.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/16/2024] [Accepted: 01/31/2024] [Indexed: 02/27/2024]
Abstract
Nearly 70% of preterm deliveries occur spontaneously, and the clinical pathways involved include preterm labor and preterm premature rupture of membranes. Prediction of preterm delivery is considered crucial due to the significant effects of preterm birth on health and the economy at both the personal and community levels. Although similar inflammatory processes occur in both term and preterm delivery, the premature activation of these processes or exaggerated inflammatory response triggered by infection or sterile factors leads to preterm delivery. Platelet activating factor (PAF) is a phosphoglycerylether lipid mediator of inflammation that is implicated in infections, cancers, and various chronic diseases and disorders including cardiovascular, renal, cerebrovascular, and central nervous system diseases. In gestational tissues, PAF mediates the inflammatory pathways that stimulate the effector mechanisms of labor, including myometrial contraction, cervical dilation, and fetal membrane rupture. Women with preterm labor and preterm premature rupture of membranes have increased levels of PAF in their amniotic fluid. In mice, the intrauterine or intraperitoneal administration of carbamyl PAF activates inflammation in gestational tissues, thereby eliciting preterm delivery. This review summarizes recent research on PAF as an important inflammatory mediator in preterm delivery and in other inflammatory disorders, highlighting its potential value for prediction, intervention, and prevention of these diseases.
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Affiliation(s)
- Hanan H Wahid
- Department of Basic Medical Sciences, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia.
| | - Fatin N Anahar
- Department of Basic Medical Sciences, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia
| | - Nurul H Isahak
- Department of Basic Medical Sciences, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia
| | - Juwairiyah Mohd Zoharodzi
- Department of Basic Medical Sciences, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia
| | - Siti N L Mohammad Khoiri
- Department of Basic Medical Sciences, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia
| | - Nurul H Mohamad Zainal
- Department of Human Anatomy, Faculty of Medicine and Health Sciences, University of Putra Malaysia, Selangor, Malaysia
| | - Norhidayah Kamarudin
- Department of Pathology, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia
| | - Hamizah Ismail
- Department of Obstetrics & Gynaecology, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia
| | - Mohammed I A Mustafa Mahmud
- Department of Basic Medical Sciences, Kulliyyah of Medicine, International Islamic University, Pahang, Malaysia
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2
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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.
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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
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3
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Detopoulou P, Fragopoulou E, Nomikos T, Antonopoulou S. Associations of phase angle with platelet-activating factor metabolism and related dietary factors in healthy volunteers. Front Nutr 2023; 10:1237086. [PMID: 38024339 PMCID: PMC10655008 DOI: 10.3389/fnut.2023.1237086] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 10/09/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Phase angle (PA) is derived from bioelectrical impedance analysis (BIA). It reflects cell membrane function and decreases in disease. It is affected by inflammation, oxidative stress, and diet. Platelet-activating factor (PAF) is a potent inflammatory lipid mediator. Its levels, along with the activity of its metabolic enzymes, including CDP-choline:1-alkyl-2-acetyl-sn-glycerol-cholinephosphotransferase, acetyl-CoA:lyso-PAF-acetyltransferases, and PAF-AH/Lp-PLA2 are also related to dietary factors, such as the dietary antioxidant capacity (DAC). The aim of the study was to estimate whether the PAF metabolic circuit and related dietary factors are associated with PA in healthy volunteers. Methods In healthy subjects, PAF, its metabolic enzyme activity, and erythrocyte fatty acids were measured, while desaturases were estimated. Food-frequency questionnaires and recalls were used, and food groups, macronutrient intake, MedDietScore, and DAC were assessed. Lifestyle and biochemical variables were collected. DXA and BIA measurements were performed. Results Lp-PLA2 activity was positively associated with PA (rho = 0.651, p < 0.001, total population; rho = 0.780, p < 0.001, women), while PAF levels were negatively associated with PA only in men (partial rho = -0.627, p = 0.012) and inversely related to DAC. Estimated desaturase 6 was inversely associated with PA (rho = -0.404, p = 0.01, total sample). Moreover, the DAC correlated positively with PA (rho = 0.513, p = 0.03, women). All correlations were adjusted for age, body mass index, and sex (if applicable). Conclusion PA is associated with PAF levels and Lp-PLA2 activity in a gender-dependent fashion, indicating the involvement of PAF in cell membrane impairment. The relationship of PA with DAC suggests a protective effect of antioxidants on cellular health, considering that antioxidants may inhibit PAF generation.
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Affiliation(s)
| | | | | | - Smaragdi Antonopoulou
- Department of Nutrition and Dietetics, School of Health Science and Education. Harokopio University, Athens, Greece
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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.
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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
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5
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Wu L, Huang X, Ouyang Q, Liu W, Liu S, Huang Y, Peng Y, Ning D, Tan C. Serum metabolomics study for acute attack of chronic pancreatitis. Clin Chim Acta 2023; 541:117251. [PMID: 36775008 DOI: 10.1016/j.cca.2023.117251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/02/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023]
Abstract
BACKGROUND & AIMS Chronic pancreatitis (CP) is an inflammatory disease characterized by irreversible changes. However, acute CP attacks can lead to various complications and affect patient prognosis. Therefore, this study aimed to identify reliable candidate metabolic biomarkers for diagnosing acute CP attacks and complement candidate diagnostic markers for CP. METHODS A total of 139 serum specimens were prospectively included in three consecutive exploratory, identification, and validation studies. All samples were analyzed for candidate diagnostic biomarkers and metabolic pathways using a liquid chromatography-mass spectrometer. RESULTS Serum metabolic profiles differed between patients with CP and non-pancreatic disease controls, and 239 potential metabolic biomarkers for diagnosing CP were identified. Based on identification and validation studies, Diacylglycerol(16:0/18:4), 16-F1-PhytoP, N-(hexacosanoyl)-tetradecasphing-4-enine, carnosic acid, and Auxin b were identified as biomarkers for distinguishing acute attacks from non-acute attacks in patients with CP. The area under the curve of the Diacylglycerol(16:0/18:4) was 0.969 (95% confidence interval, 0.869-1) in the validation study. CONCLUSIONS To the best of our knowledge, this is the first prospective cohort study to identify and validate a metabolomic signature in serum for diagnosing acute attacks of CP. In addition, our study identified 239 potential biomarkers for CP diagnosis.
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Affiliation(s)
- Ling Wu
- Department of Clinical Laboratory, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China
| | - Xiangping Huang
- Department of Clinical Laboratory, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China
| | - Qianhui Ouyang
- Department of Clinical Laboratory, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China
| | - Wen Liu
- Department of Pharmacy, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China
| | - Sixiang Liu
- Department of Emergency, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China
| | - Ying Huang
- Department of Emergency, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China
| | - Ya Peng
- Department of Gastroenterology, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China
| | - Ding Ning
- Department of Emergency Medical, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, China
| | - Chaochao Tan
- Department of Clinical Laboratory, The First Affiliated Hospital of Hunan Normal University (Hunan Provincial People's Hospital), Changsha, Hunan, China.
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Tremblay MÈ, Almsherqi ZA, Deng Y. Plasmalogens and platelet-activating factor roles in chronic inflammatory diseases. Biofactors 2022; 48:1203-1216. [PMID: 36370412 DOI: 10.1002/biof.1916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/10/2022] [Indexed: 11/13/2022]
Abstract
Fatty acids and phospholipid molecules are essential for determining the structure and function of cell membranes, and they hence participate in many biological processes. Platelet activating factor (PAF) and its precursor plasmalogen, which represent two subclasses of ether phospholipids, have attracted increasing research attention recently due to their association with multiple chronic inflammatory, neurodegenerative, and metabolic disorders. These pathophysiological conditions commonly involve inflammatory processes linked to an excess presence of PAF and/or decreased levels of plasmalogens. However, the molecular mechanisms underlying the roles of plasmalogens in inflammation have remained largely elusive. While anti-inflammatory responses most likely involve the plasmalogen signal pathway; pro-inflammatory responses recruit arachidonic acid, a precursor of pro-inflammatory lipid mediators which is released from membrane phospholipids, notably derived from the hydrolysis of plasmalogens. Plasmalogens per se are vital membrane phospholipids in humans. Changes in their homeostatic levels may alter cell membrane properties, thus affecting key signaling pathways that mediate inflammatory cascades and immune responses. The plasmalogen analogs of PAF are also potentially important, considering that anti-PAF activity has strong anti-inflammatory effects. Plasmalogen replacement therapy was further identified as a promising anti-inflammatory strategy allowing for the relief of pathological hallmarks in patients affected by chronic diseases with an inflammatory component. The aim of this Short Review is to highlight the emerging roles and implications of plasmalogens in chronic inflammatory disorders, along with the promising outcomes of plasmalogen replacement therapy for the treatment of various PAF-related chronic inflammatory pathologies.
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Affiliation(s)
- Marie-Ève Tremblay
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
- Axe Neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec City, Canada
- Department of Molecular Medicine, Université de Laval, Québec City, Canada
- Neurology and Neurosurgery Department, McGill University, Montréal, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, British Columbia, Canada
| | - Zakaria A Almsherqi
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yuru Deng
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
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7
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Sánchez Crespo M, Montero O, Fernandez N. The role of PAF in immunopathology: From immediate hypersensitivity reactions to fungal defense. Biofactors 2022; 48:1217-1225. [PMID: 36176024 PMCID: PMC10087027 DOI: 10.1002/biof.1888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/03/2022] [Indexed: 12/24/2022]
Abstract
Platelet-activating factor (PAF, 1-alkyl-2-acetyl-sn-glycero-3-phosphorylcholine) was discovered when the mechanisms involved in the deposition of immune complex in tissues were being scrutinized in the experimental model of rabbit serum sickness. The initial adscription of PAF to IgE-dependent anaphylaxis was soon extended after disclosing its release from phagocytes stimulated by calcium mobilizing agents, formylated peptides, and phagocytosable particles. This explains why ongoing research in the field turned to the analysis of immune cell types and stimuli involved in PAF production with the purpose of establishing its role in pathology. This was spurred by the identification of the chemical structure of PAF and the enzymic mechanisms involved in its biosynthesis and degradation, which showed commonalities with those involved in eicosanoid production and the Lands' cycle of phospholipid fatty acid remodeling. The reassignment of PAF function in immunopathology is explained by the finding that the most robust mechanisms leading to PAF production are associated with opsonic and non-opsonic phagocytosis, depending on the cell type. While polymorphonuclear leukocytes exhibit opsonic phagocytosis, monocyte-derived dendritic cells show a marked preference for non-opsonic phagocytosis associated with C-type lectin receptors. This is particularly relevant to the defense against fungal invasion and explains why PAF exerts an autocrine feed-forwarding mechanism required for the selective expression of some cytokines.
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Affiliation(s)
- Mariano Sánchez Crespo
- Unidad de Excelencia Instituto de Biología y Genética Molecular, CSIC-Universidad de Valladolid, Valladolid, Spain
| | - Olimpio Montero
- Unidad de Excelencia Instituto de Biología y Genética Molecular, CSIC-Universidad de Valladolid, Valladolid, Spain
| | - Nieves Fernandez
- Unidad de Excelencia Instituto de Biología y Genética Molecular, CSIC-Universidad de Valladolid, Valladolid, Spain
- Departamento de Bioquímica y Biología Molecular, y Fisiología, Facultad de Medicina, Universidad de Valladolid, Valladolid, Spain
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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.
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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,
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9
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Awoyemi AA, Borchers C, Liu L, Chen Y, Rapp CM, Brewer CA, Elased R, Travers JB. Acute ethanol exposure stimulates microvesicle particle generation in keratinocytes. Toxicol Lett 2022; 355:100-105. [PMID: 34801640 PMCID: PMC8702459 DOI: 10.1016/j.toxlet.2021.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/25/2021] [Accepted: 11/16/2021] [Indexed: 02/03/2023]
Abstract
Ethanol has been demonstrated to exert profound effects upon cells and tissues via multiple mechanisms. One recently appreciated means by which cells can communicate with other cells is via the production and release of extracellular vesicles. Though smaller exosomes have been demonstrated to be released in response to ethanol exposure, the ability of ethanol to modulate the generation and release of larger microvesicle particles (MVP) is lesser studied. The present studies examined the ability of exogenous ethanol to generate MVP with a focus on skin cells. Acute ethanol exposure resulted in augmented MVP release in keratinocytes and in the skin and blood of mice. Unlike other stimuli such as ultraviolet B radiation or thermal burn injury, ethanol-mediated MVP release was independent of the Platelet-activating Factor receptor (PAFR). However, ethanol pretreatment was found to augment thermal burn injury-induced MVP in a PAFR-dependent manner. These studies provide a novel mechanism for ethanol-mediated effects, that could be relevant in the significant toxicity associated with thermal burn injury in the setting of alcohol intoxication.
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Affiliation(s)
- Azeezat A. Awoyemi
- Departments of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Christina Borchers
- Departments of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Langni Liu
- Departments of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Yanfang Chen
- Departments of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Christine M. Rapp
- Departments of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Chad A. Brewer
- Departments of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Ramzi Elased
- Departments of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Jeffrey B. Travers
- Departments 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, M.D., Ph.D., Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, 3640 Col Glenn Hwy, Dayton, OH 46435,
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10
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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.
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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)
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11
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McGlone CL, Christian L, Schmeusser B, Liu L, Chalfant CE, Stephensen DJ, Sherwin CM, Rapp CM, Sattouf Z, Rohan CA, Morris C, Chen Y, Travers JB. Evidence for Systemic Reactive Oxygen Species in UVB-mediated Microvesicle Formation. Photochem Photobiol 2022; 98:242-247. [PMID: 34324712 PMCID: PMC8799769 DOI: 10.1111/php.13494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 01/03/2023]
Abstract
Recent studies have implicated subcellular microvesicle particles (MVP) in the ability of ultraviolet B radiation to exert both local and systemic effects. Indeed, UVB generates MVP (UVB-MVP) in human skin and systemically following phototherapy. The current studies were designed to test the hypothesis that the ability of UVB to generate MVP was dependent upon reactive oxygen species (ROS). To that end, we tested urine samples from subjects undergoing UVB phototherapy for the presence of isoprostanes as well as the oxidized guanosine derivative 8OHdG. We also conducted a clinical study in which volar forearms of subjects were treated with localized UVB and erythema/MVP measured. The same cohort was then treated with 7 days of vitamin C (2 g day-1 ) and vitamin E (1000 IU day-1 ), and UVB-induced MVPs tested on the contralateral forearm. Urine specimens from subjects undergoing phototherapy were found to have increased levels of isoprostanes and 8OHdG, with maximal levels noted 8-16 h post-treatment. Treatment with antioxidant vitamins resulted in diminished UVB-generated skin MVP to baseline levels. These studies suggest that whole-body UVB generates a systemic pro-oxidative response, and that antioxidants can attenuate localized skin UVB-MVPs.
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Affiliation(s)
- Cameron L. McGlone
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Lea Christian
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Benjamin Schmeusser
- 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
| | - Charles E. Chalfant
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA,Research Service, James A. Haley Veterans Hospital, Tampa, FL 33612, USA
| | - Daniel J. Stephensen
- Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL 33620, USA
| | - Catherine M. Sherwin
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435,Department of Pediatrics, 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
| | - Zafer Sattouf
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH 45435
| | - Craig A. Rohan
- 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
| | - Connor Morris
- 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
| | - 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)
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12
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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.
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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
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13
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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.
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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
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14
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Agobe F, DeLouise LA. The Role of Extracellular Vesicles in the Skin and Their Interactions with Nanoparticles. WORLD JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2020; 1:17-21. [PMID: 39045530 PMCID: PMC11265537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Extracellular vesicles (EVs) include exosomes and microvesicles. They are released from cells under both physiological and pathological conditions. EVs can be isolated from a host of biological mediums, such as blood plasma, saliva, and skin. The role of EVs and their contents including RNA, proteins, and signaling molecules, depends on the specific cells and organs from which they are derived and diseased state. EVs play a key role in cell-to-cell communication. Although the role of EVs in skin biology is a developing field, recent literature suggests they play an important role in skin homeostasis, disease, and transdermal drug delivery. EVs have been shown to modulate skin pigmentation, and aid in the cutaneous wound healing process and the secretion of nanoparticles. This paper reviews the basics of EV biogenesis, their isolation and their role in skin. We also review what is currently known about how nanoparticles may impact the contents of EVs in the skin.
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Affiliation(s)
- Francesca Agobe
- Department of Dermatology, University of Rochester Medical Center, Rochester, New York, USA
| | - Lisa A. DeLouise
- Department of Dermatology, University of Rochester Medical Center, Rochester, New York, USA
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, USA
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15
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Brand RM, Stottlemyer JM, Paglia MC, Carey CD, Falo LD. Ethanol consumption synergistically increases ultraviolet radiation induced skin damage and immune dysfunction. J Dermatol Sci 2020; 101:40-48. [PMID: 33213984 DOI: 10.1016/j.jdermsci.2020.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 10/08/2020] [Accepted: 11/01/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND Excessive UV radiation disrupts skin homeostasis by multiple mechanisms that extend beyond the simple erythema associated with sunburns including reduction of antioxidants, increased DNA damage, and impairment of skin immune responses. Recreational UV exposure frequently occurs concurrently with excessive ethanol (EtOH). Epidemiological studies suggest a harmful, dose-dependent impact of EtOH in the setting of high UV exposure, leading to increased severity of sunburns relative to those generated in the absence of EtOH. Furthermore, EtOH consumption and UV radiation have multiple overlapping effects on the skin that could account for the epidemiological association. OBJECTIVE To elucidate the relationship between excessive EtOH ingestion and UV exposures on early skin damage and downstream immune dysfunction. METHODS We examined the impact of UVB on local skin damage, including inflammation, sunburned cells, apoptotic cells, melanin and antioxidant levels, DNA damage and immune dysfunction in the presence or absence of EtOH ingestion by combining standard mouse models of EtOH consumption and UVB exposure models. To confirm that the observed changes in mouse skin were relevant to human skin, we investigated the effects of EtOH on UV-induced skin damage with human skin explants. RESULTS We demonstrated that EtOH consumption and UV exposure act synergistically to increase the severity of local skin damage resulting in impaired melanin responses, reduced antioxidants, greater DNA damage, and immune dysfunction as measured by reduced contact hypersensitivity. CONCLUSIONS The results support incorporation of the risks of combined UV exposure and excessive alcohol consumption into public health campaigns.
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Affiliation(s)
- Rhonda M Brand
- Department of Dermatology, University of Pittsburgh, Pittsburgh, PA, USA; Division of Gastroenterology and Hepatology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA; Magee Womens Research Institute, University of Pittsburgh, Pittsburgh, PA, USA.
| | | | - Melissa C Paglia
- Department of Dermatology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Cara Donahue Carey
- Department of Dermatology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Louis D Falo
- Department of Dermatology, University of Pittsburgh, Pittsburgh, PA, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA; The Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, PA, USA; The McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA; The UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA
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