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Sinha S, Sardana K, Panesar S, Dorjay K, Malhotra P. Comparison of outcomes of azathioprine, leflunomide and allergen avoidance in patients with patch test-positive pigmented contact dermatitis: a randomized comparative study. Clin Exp Dermatol 2024; 49:247-254. [PMID: 37936305 DOI: 10.1093/ced/llad378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 10/19/2023] [Indexed: 11/09/2023]
Abstract
BACKGROUND Pigmented contact dermatitis (PCD) is a noneczematous form of allergic contact dermatitis characterized by dermal hyperpigmentation. Allergen avoidance is the cornerstone of therapy, but it is difficult to achieve. The use of immunosuppressives seems rational, but data are lacking. OBJECTIVES To compare outcomes with azathioprine (AZA), leflunomide and allergen avoidance (AA) in patients with PCD. METHODS A comparative study was conducted on 28 patients with patch test-positive PCD who were randomly allocated to one of three treatment groups: AZA 2 mg kg-1 daily for 24 weeks + AA (n = 10); leflunomide (LEF) 20 mg daily for 24 weeks + -AA (n = 8); AA alone (n = 10). Patients were followed up for an additional 24 weeks. The Dermal Pigmentation Area and Severity Index (DPASI) score and Hindi Melasma Quality of Life scale (MELASQOL) were used to assess hyperpigmentation and quality of life (QoL). respectively. RESULTS Hair colorants (n = 12) and paraphenylenediamine (n = 8) were the most common allergens. Mean (SD) DPASI score decreased from 30.97 (3.69), 32.35 (3.90) and 31.86 (3.47) to 13.78 (4.25), 21.67 (2.99) and 20.64 (3.82) at 48 weeks in the three groups, respectively (P < 0.001); the maximum percentage decline was seen with AZA (56%). Mean (SD) MELASQOL score was reduced in the three treatment groups from 48.0 (6.46), 46.75 (3.69) and 46.6 (4.65) to 19.6 (6.98), 24.5 (5.80) and 24.0 (5.49), respectively, at 48 weeks (P < 0.001). Reductions in DPASI and Hindi MELASQOL scores were significantly correlated. The most frequent adverse event was transaminitis in both the AZA and LEF groups. CONCLUSIONS Patients on AZA achieved a statistically significantly greater reduction in DPASI and MELASQOL score; therefore, AZA may fulfil an unmet need in PCD treatment. An objective reduction in hyperpigmentation was paralleled by an improvement in QoL score, reiterating the need for active management of this disease.
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Affiliation(s)
- Surabhi Sinha
- Department of Dermatology, Lady Hardinge Medical College and Associated Hospital, New Delhi, India
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Kim MS, Chung BY, Chang SE, Oh SH, Ryu HJ, Kim DH, Lee JH, Ko JY, Kim JE, Lee JH, Lee GY, Jeon J, Choi H, Roh MR, Bae JM, Na JI, Jung HJ, Bang CH, Kim HS, Lee SH, Shin MK, Lee SH, Park KY, Park CJ, Choi M, Yoon TJ, Suh KS, Park YL, Ryoo YW, Kim MH, Kim YC. Pigmented contact dermatitis and hair dyes: A retrospective case-control multicentre study in Korea. J Eur Acad Dermatol Venereol 2023; 37:2543-2549. [PMID: 37528459 DOI: 10.1111/jdv.19395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 06/26/2023] [Indexed: 08/03/2023]
Abstract
BACKGROUND Pigmented contact dermatitis (PCD), a rare variant of non-eczematous contact dermatitis, is clinically characterized by sudden-onset brown or grey pigmentation on the face and neck. It is hypothesized to be caused by repeated contact with low levels of allergens. OBJECTIVES This study evaluated the risk of using hair dyes in patients with PCD in Korea. METHODS A total of 1033 PCD patients and 1366 controls from 31 university hospitals were retrospectively recruited. We collected and analysed the data from the patient group, diagnosed through typical clinical findings of PCD and the control group, which comprised age/sex-matched patients who visited the participating hospitals with pre-existing skin diseases other than current allergic disease or PCD. RESULTS Melasma and photosensitivity were significantly more common in the control group, and a history of contact dermatitis was more common in the PCD group. There were significantly more Fitzpatrick skin type V participants in the PCD group than in the control group. There was no significant difference in sunscreen use between the groups. Using dermatologic medical history, Fitzpatrick skin type and sunscreen use as covariates, we showed that hair dye use carried a higher PCD risk (odds ratio [OR] before adjustment: 2.06, confidence interval [CI]: 1.60-2.65; OR after adjustment: 2.74, CI: 1.88-4.00). Moreover, henna users had a higher risk of PCD (OR before adjustment: 5.51, CI: 4.07-7.47; OR after adjustment: 7.02, CI: 4.59-10.74), indicating a significant increase in the risk of PCD with henna dye use. Contact dermatitis history was more prevalent in henna users than in those using other hair dyes in the PCD group (17.23% vs. 11.55%). CONCLUSION Hair dye use is a risk factor for PCD. The risk significantly increased when henna hair dye was used by those with a history of contact dermatitis.
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Affiliation(s)
- Myoung Shin Kim
- Department of Dermatology, Sanggye Paik Hospital, School of Medicine, Inje University, Seoul, South Korea
| | - Bo Young Chung
- Department of Dermatology, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea
| | - Sung Eun Chang
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Sang Ho Oh
- Department of Dermatology, Severance Hospital and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Hwa Jung Ryu
- Department of Dermatology, College of Medicine, Korea University, Ansan Hospital, Ansan, South Korea
| | - Dong Hyun Kim
- Department of Dermatology, Bundang Medical Center, School of Medicine, CHA University, Seongnam, South Korea
| | - June Hyunkyung Lee
- Department of Dermatology, Eulji Medical Center, College of Medicine, Eulji University, Seoul, South Korea
| | - Joo Yeon Ko
- Department of Dermatology, Hanyang University College of Medicine and Hanyang University Seoul Hospital, Seoul, South Korea
| | - Jeong Eun Kim
- Department of Dermatology, Hanyang University College of Medicine and Hanyang University Seoul Hospital, Seoul, South Korea
| | - Jong Hee Lee
- Department of Dermatology, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul, South Korea
| | - Ga Young Lee
- Department of Dermatology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Jiehyun Jeon
- Department of Dermatology, Guro Hospital, Korea University College of Medicine, Seoul, South Korea
| | - Hoon Choi
- Department of Dermatology, Chosun University Hospital, Gwangju, South Korea
| | - Mi Ryung Roh
- Department of Dermatology, Gangnam Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Jung Min Bae
- Department of Dermatology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Jung-Im Na
- Department of Dermatology, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Hye Jung Jung
- Department of Dermatology, National Medical Center, Seoul, South Korea
| | - Chul Hwan Bang
- Department of Dermatology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, South Korea
| | - Hei Sung Kim
- Department of Dermatology, Incheon St. Mary's Hospital, The Catholic University of Korea, Incheon, South Korea
| | - Seung Ho Lee
- Department of Dermatology, Dongguk University Ilsan Hospital, College of Medicine, Dongguk University, Goyang, South Korea
| | - Min Kyung Shin
- Department of Dermatology, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Si-Hyung Lee
- Department of Dermatology, Seoul National University Hospital, Seoul, South Korea
| | - Kui Young Park
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, South Korea
| | - Chul-Jong Park
- Department of Dermatology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Bucheon, South Korea
| | - Mira Choi
- Department of Dermatology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, South Korea
| | - Tae-Jin Yoon
- Department of Dermatology, School of Medicine, Gyeongsang National University & Hospital, Jinju, South Korea
| | - Kee Suck Suh
- Department of Dermatology, Kosin University College of Medicine, Busan, South Korea
| | - Young Lip Park
- Department of Dermatology, Soonchunhyang University Bucheon Hospital, Bucheon, South Korea
| | - Young Wook Ryoo
- Department of Dermatology, School of Medicine, Keimyung University, Daegu, South Korea
| | - Myung Hwa Kim
- Department of Dermatology, College of Medicine, Dankook University, Cheonan, South Korea
| | - You Chan Kim
- Department of Dermatology, Ajou University School of Medicine, Suwon, South Korea
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Riehl’s Melanosis: A Multimodality, In Vivo, Real-Time Skin Imaging Study with Cellular Resolution Optical Coherence Tomography and Advanced Skin Diagnosis System in a Tertiary Medical Center. Bioengineering (Basel) 2022; 9:bioengineering9090419. [PMID: 36134965 PMCID: PMC9495881 DOI: 10.3390/bioengineering9090419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/13/2022] [Accepted: 08/22/2022] [Indexed: 11/17/2022] Open
Abstract
Background: Riehl’s melanosis is a psychologically devastating hyperpigmentary disorder that typically occurs on the face and neck. The study of Riehl’s melanosis is limited due to its rarity, variable morphology, and lack of noninvasive diagnostic tools. Recent advances in skin imaging analysis and diagnostic systems improve diagnostic accuracy and enable the noninvasive, real-time evaluation of pigmentary disease. A comprehensive study of Riehl’s melanosis clinical morphology with multimodality and in vivo skin imaging systems has yet to be reported. Objectives: To investigate the clinical features and in vivo advanced skin imaging findings of Riehl’s melanosis. Methods: We retrospectively investigated the clinical characteristics, dermoscopic, and histopathological features of Riehl’s melanosis. We further utilized multimodality skin imaging analysis systems, including a cellular resolution optical coherence tomography (OCT) and new skin diagnosis system, to investigate the features of Riehl’s melanosis. In addition, we compared OCT findings with histopathological features and clinical assessment. Results: We evaluated 30 patients with Riehl’s melanosis at a tertiary medical center from 2010 to 2022. The average age was 47.7 ± 12.3 (mean ± SD) years, predominantly female patients (female: n = 23; male: n = 7). Cellular resolution OCT imaging from lesion skin shows increased melanocyte capping, disrupted basement membrane, telangiectatic blood vessels, and melanophages in the dermis. The advanced skin diagnosis system captured subclinical erythema of the skin, highlighting the inflammatory nature of the disease. The results correlated well with histopathological findings. Limitations: This is a single-center, cross-sectional study. Conclusions: We highlight the features of Riehl’s melanosis through a novel cellular resolution OCT and photographic skin diagnosis system. A multimodality skin diagnosis system can serve as a real-time, in vivo, noninvasive method for evaluating pigmentary disorders.
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Park BJ, Jung YJ, Ro YS, Chang SE, Kim JE. Therapeutic Effects of New Pulsed-Type Microneedling Radiofrequency for Refractory Facial Pigmentary Disorders. Dermatol Surg 2022; 48:327-333. [PMID: 34999602 DOI: 10.1097/dss.0000000000003367] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Numerous treatments for pigmentary disorders have been used with variable outcomes. Recently, a new radiofrequency (RF) device with minimal pulse duration has been introduced. OBJECTIVE The aim of this study was to evaluate the efficacy and safety of a pulsed-type microneedling RF device for treatment of facial pigmentary disorders. METHODS Forty-four patients diagnosed with facial melasma or Riehl melanosis received 5 treatments with RF at 2-week intervals, and evaluation was performed at each visits, including 4 and 8 weeks after the last treatment. Treatment outcomes were evaluated by investigator global assessment, patient global assessment score, and skin biophysical parameters of erythema index, melanin index (MI), and transepidermal water loss. Gene array and immunohistochemical staining including melan-A, Fontana silver, CD44, basic fibroblast growth factor (bFGF), and periodic acid-Schiff were performed. RESULTS Most of the patients showed clinical improvement. Erythema index, MI, and transepidermal water loss decreased after the first treatment. Histopathologic examination showed decrease of melanin pigment, melanophages, and blood vessel proliferation but thickened basement membrane after treatment. Expression of CD44 and b-FGF was decreased after treatment. There were no serious adverse events reported during the study. CONCLUSION Pulsed-type microneedling RF could be a treatment option for facial pigmentary disorders.
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Affiliation(s)
- Byeong Jin Park
- Department of Dermatology, Hanyang University College of Medicine, Seoul, Korea
| | - You Jin Jung
- Department of Dermatology, Hanyang University College of Medicine, Seoul, Korea
| | - Young Suck Ro
- Department of Dermatology, Hanyang University College of Medicine, Seoul, Korea
| | - Sung Eun Chang
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jeong Eun Kim
- Department of Dermatology, Hanyang University College of Medicine, Seoul, Korea
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Choi ME, Yoo H, Lee HR, Moon IJ, Lee WJ, Song Y, Chang SE. Carvedilol, an Adrenergic Blocker, Suppresses Melanin Synthesis by Inhibiting the cAMP/CREB Signaling Pathway in Human Melanocytes and Ex Vivo Human Skin Culture. Int J Mol Sci 2020; 21:ijms21228796. [PMID: 33233731 PMCID: PMC7699935 DOI: 10.3390/ijms21228796] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 11/17/2020] [Accepted: 11/18/2020] [Indexed: 12/02/2022] Open
Abstract
Catecholamines function via G protein-coupled receptors, triggering an increase in intracellular levels of 3′,5′-cyclic adenosine monophosphate (cAMP) in various cells. Catecholamine biosynthesis and the β-adrenergic receptor exist in melanocytes; thus, catecholamines may play critical roles in skin pigmentation. However, their action and mechanisms mediating melanogenesis in human skin have not yet been investigated. Therefore, we examined the potential anti-melanogenetic effect of carvedilol, a nonselective β-blocker with weak α1-blocking activities. Carvedilol reduced melanin content and cellular tyrosinase activity without compromising cellular viability in normal human melanocytes as well as in mel-Ab immortalized mouse melanocytes. Carvedilol downregulated microphthalmia-associated transcription factor (MITF), tyrosinase, tyrosinase-related protein (TRP)-1, and TRP-2. Carvedilol treatment led to the downregulation of phosphor-cAMP response element-binding protein (CREB). Moreover, the increase in cAMP levels upon treatment with forskolin reversed the anti-melanogenic action of carvedilol. In addition, carvedilol remarkably reduced the melanin index in ultraviolet-irradiated human skin cultures. Taken together, our results indicate that carvedilol effectively suppresses melanogenesis in human melanocytes and ex vivo human skin by inhibiting cAMP/protein kinase A/CREB signaling. The anti-melanogenic effects of carvedilol have potential significance for skin whitening agents.
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Affiliation(s)
- Myoung Eun Choi
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea; (M.E.C.); (H.Y.); (I.J.M.); (W.J.L.)
| | - Hanju Yoo
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea; (M.E.C.); (H.Y.); (I.J.M.); (W.J.L.)
- Bio-Medical Institute of Technology (BMIT), University of Ulsan College of Medicine, Ulsan 05505, Korea;
| | - Ha-Ri Lee
- Bio-Medical Institute of Technology (BMIT), University of Ulsan College of Medicine, Ulsan 05505, Korea;
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea
| | - Ik Joon Moon
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea; (M.E.C.); (H.Y.); (I.J.M.); (W.J.L.)
| | - Woo Jin Lee
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea; (M.E.C.); (H.Y.); (I.J.M.); (W.J.L.)
| | - Youngsup Song
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea
- Correspondence: (Y.S.); (S.E.C.); Tel.: +82-2-3010-2089 (Y.S.); +82-2-3010-3460 (S.E.C.)
| | - Sung Eun Chang
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea; (M.E.C.); (H.Y.); (I.J.M.); (W.J.L.)
- Correspondence: (Y.S.); (S.E.C.); Tel.: +82-2-3010-2089 (Y.S.); +82-2-3010-3460 (S.E.C.)
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Transient receptor potential vanilloid 1 (TRPV1) inhibition is related to the suppression of inflammation-associated hypermelanosis. J Dermatol Sci 2020; 98:65-68. [PMID: 32147196 DOI: 10.1016/j.jdermsci.2020.02.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 01/09/2020] [Accepted: 02/19/2020] [Indexed: 01/01/2023]
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Tao J, Champlain A, Weddington C, Moy L, Tung R. Treatment of burn scars in Fitzpatrick phototype III patients with a combination of pulsed dye laser and non-ablative fractional resurfacing 1550 nm erbium:glass/1927 nm thulium laser devices. Scars Burn Heal 2018; 4:2059513118758510. [PMID: 29799583 PMCID: PMC5965338 DOI: 10.1177/2059513118758510] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Introduction: Burn scars cause cosmetic disfigurement and psychosocial distress. We present two Fitzpatrick phototype (FP) III patients with burn scars successfully treated with combination pulsed dye laser (PDL) and non-ablative fractional lasers (NAFL). Case 1: A 30-year-old, FP III woman with a history of a second-degree burn injury to the bilateral arms and legs affecting 30% body surface area (BSA) presented for cosmetic treatment. The patient received three treatments with 595 nm PDL (7 mm, 8 J, 6 ms), six with the 1550 nm erbium:glass laser (30 mJ, 14% density, 4–8 passes) and five with the 1927 nm thulium laser (10 mJ, 30% density, 4–8 passes). Treated burn scars improved significantly in thickness, texture and colour. Case 2: A 33-year-old, FP III man with a history of a second-degree burn injury of the left neck and arm affecting 7% BSA presented for cosmetic treatment. The patient received two treatments with 595 nm PDL (5 mm, 7.5 J, 6 ms), four with the 1550 nm erbium:glass laser (30 mJ, 14% density, 4–8 passes) and two with the 1927 nm thulium laser (10 mJ, 30% density, 4–8 passes). The burn scars became thinner, smoother and more normal in pigmentation and appearance. Discussion: Our patients’ burn scars were treated with a combination of PDL and NAFL (two wavelengths). The PDL targets scar hypervascularity, the 1550 nm erbium:glass stimulates collagen remodelling and the 1927 nm thulium targets epidermal processes, particularly hyperpigmentation. This combination addresses scar thickness, texture and colour with a low side effect profile and is particularly advantageous in patients at higher risk of post-procedure hyperpigmentation. Conclusion: Our cases suggest the combination of 595nm PDL plus NAFL 1550 nm erbium:glass/1927 nm thulium device is effective and well-tolerated for burn scar treatment in skin of colour.
While all scars can be bothersome, burn scars can be particularly troubling. They can be large, itchy, painful and limit range of motion. Patients with medium and darker skin tones may be more likely to develop dark and discoloured scars due to burns and other scarring injuries. In our case series, we used two types of lasers to treat thick, darkly pigmented burn scars in two patients with medium and darker skin tones. While the pulsed dye laser targets the redness and thickened aspects of scars to restore a more normal appearance, the non-ablative fractional resurfacing laser creates microscopic zones of controlled injury to resurface scars, stimulate new collagen growth, improve texture and lighten excess pigmentation. Treatments were performed once a month for 6–12 months. Using these lasers in combination, our treatment method made our patients’ scars thinner, smoother and more evenly coloured over time, resulting in a more natural appearance. This multi-modal approach was a safe and effective no-downtime method for the improvement of scars in skin of colour patients.
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Affiliation(s)
- Joy Tao
- Division of Dermatology, Department of Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Amanda Champlain
- Division of Dermatology, Department of Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Charles Weddington
- Department of Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Lauren Moy
- Division of Dermatology, Department of Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
| | - Rebecca Tung
- Division of Dermatology, Department of Medicine, Loyola University Chicago Stritch School of Medicine, Maywood, IL, USA
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Mai W, Lu D, Liu X, Chen L. MCP-1 produced by keratinocytes is associated with leucocyte recruitment during elicitation of nickel-induced occupational allergic contact dermatitis. Toxicol Ind Health 2017; 34:36-43. [PMID: 29132256 DOI: 10.1177/0748233717738633] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
To investigate the expression profile of monocyte chemoattractant peptide-1 (MCP-1) by keratinocytes after nickel exposure and to identify its role for leucocyte migration during nickel-induced occupational allergic contact dermatitis (OACD), 26 workers diagnosed with nickel-induced OACD were enrolled. Skin biopsies from the positive nickel-challenged sites at different time points were assessed by immunohistochemistry (IHC) for MCP-1, CD68, CD45RO, and in situ hybridization (ISH) for MCP-1, using chronic periumbilical dermititis as controls. The expressions of MCP-1 in HaCaT cell culture after nickel treatment were quantified by enzyme-linked immunosorbent assay. The results showed that at positive nickel-challenged sites, strong expressions of MCP-1, both messenger RNA (mRNA) and protein, were detected in the basal keratinocytes during the early phase (24-48 h after nickel application), paralleled by the recruitment of CD68+ and CD45RO+ cells to the skin compartments. The expressions of MCP-1 declined gradually in the late phase (72-96 h after nickel application). Treatment with nickel sulfate at noncytotoxic concentrations (0.01-100 µM) induced a concentration-related elevation of MCP-1 expression by HaCaT cells compared to the untreated cells. The data indicated that a temporal expression pattern of MCP-1 produced by keratinocytes after nickel exposure was involved in the complex process of mononuclear cell infiltration during elicitation of nickel-induced OACD. Targeting MCP-1 might be a potential therapeutic strategy for OACD.
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Affiliation(s)
- Weihua Mai
- 1 Department of Preventive Medicine, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
| | - Dongqing Lu
- 2 Department of Dermatology, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
| | - Xingwei Liu
- 3 Department of General Surgery, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
| | - Ling Chen
- 4 Department of Medical Quality Control, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
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