1
|
Okiyama N, Nakamura Y, Ishitsuka Y, Inoue S, Kubota N, Saito A, Watanabe R, Fujisawa Y, Igawa K. Successful topical treatment with ketoconazole for facial rashes refractory to dupilumab in patients with atopic dermatitis: case reports. J Eur Acad Dermatol Venereol 2020; 34:e474-e476. [DOI: 10.1111/jdv.16383] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/29/2020] [Accepted: 03/16/2020] [Indexed: 12/20/2022]
Affiliation(s)
- N. Okiyama
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - Y. Nakamura
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - Y. Ishitsuka
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - S. Inoue
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - N. Kubota
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - A. Saito
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - R. Watanabe
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - Y. Fujisawa
- Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
| | - K. Igawa
- Department of Dermatology Dokkyo Medical University School of Medicine Tochigi Japan
| |
Collapse
|
2
|
Nakamura Y, Ishitsuka Y, Tanaka R, Okiyama N, Saito A, Watanabe R, Fujisawa Y. Acral lentiginous melanoma and mucosal melanoma expressed less programmed-death 1 ligand than cutaneous melanoma: a retrospective study of 73 Japanese melanoma patients. J Eur Acad Dermatol Venereol 2019; 33:e424-e426. [PMID: 31187906 DOI: 10.1111/jdv.15742] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/10/2019] [Accepted: 05/29/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Y Nakamura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Y Ishitsuka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - R Tanaka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - N Okiyama
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - A Saito
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - R Watanabe
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Y Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| |
Collapse
|
3
|
Ishitsuka Y, Inoue S, Furuta J, Koguchi-Yoshioka H, Nakamura Y, Watanabe R, Okiyama N, Fujisawa Y, Enokizono T, Fukushima H, Suzuki H, Nishino I, Kosaki K, Fujimoto M. Sweat retention anhidrosis associated with tubular aggregate myopathy. Br J Dermatol 2019; 181:1104-1106. [PMID: 31145807 DOI: 10.1111/bjd.18175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Y Ishitsuka
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| | - S Inoue
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| | - J Furuta
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| | | | - Y Nakamura
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| | - R Watanabe
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| | - N Okiyama
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| | - Y Fujisawa
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| | - T Enokizono
- Department of Paediatrics, University of Tsukuba, Tsukuba, Japan
| | - H Fukushima
- Department of Paediatrics, University of Tsukuba, Tsukuba, Japan
| | - H Suzuki
- Centre for Medical Genetics, Keio University, Tokyo, Japan
| | - I Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Centre of Neurology and Psychiatry, Tokyo, Japan
| | - K Kosaki
- Centre for Medical Genetics, Keio University, Tokyo, Japan
| | - M Fujimoto
- Department of Dermatology, University of Tsukuba, Tsukuba, Japan
| |
Collapse
|
4
|
Vo S, Watanabe R, Koguchi-Yoshioka H, Matsumura Y, Ishitsuka Y, Nakamura Y, Okiyama N, Fujisawa Y, Fujimoto M. CD8 resident memory T cells with interleukin 17A-producing potential are accumulated in disease-naïve nonlesional sites of psoriasis possibly in correlation with disease duration. Br J Dermatol 2019; 181:410-412. [PMID: 30737771 DOI: 10.1111/bjd.17748] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S Vo
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - R Watanabe
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - H Koguchi-Yoshioka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Y Matsumura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Y Ishitsuka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Y Nakamura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - N Okiyama
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Y Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - M Fujimoto
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| |
Collapse
|
5
|
Ogawa T, Ishitsuka Y, Roop D, Fujimoto M. 314 Loricrin protects against chemical carcinogenesis but affects cancer immunoediting. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
6
|
Nakamura Y, Watanabe R, Zhenjie Z, Koguchi-Yoshioka H, Vo S, Oya K, Matsumura Y, Tanaka R, Okiyama N, Ishitsuka Y, Fujimoto M, Fujisawa Y. CD103 negative memory T cells may play important roles in making regulatory T-cell-enriched environments in skin tumours. J Eur Acad Dermatol Venereol 2019; 33:e211-e214. [PMID: 30719755 DOI: 10.1111/jdv.15478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Y Nakamura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - R Watanabe
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Z Zhenjie
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - H Koguchi-Yoshioka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - S Vo
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - K Oya
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Y Matsumura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - R Tanaka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - N Okiyama
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Y Ishitsuka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - M Fujimoto
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Y Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| |
Collapse
|
7
|
Fujisawa Y, Otomo Y, Ogata Y, Nakamura Y, Fujita R, Ishitsuka Y, Watanabe R, Okiyama N, Ohara K, Fujimoto M. Deep learning surpasses dermatologists. Br J Dermatol 2019. [DOI: 10.1111/bjd.17470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
8
|
Fujisawa Y, Otomo Y, Ogata Y, Nakamura Y, Fujita R, Ishitsuka Y, Watanabe R, Okiyama N, Ohara K, Fujimoto M. 深度学习超越皮肤科医生. Br J Dermatol 2019. [DOI: 10.1111/bjd.17483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
9
|
Okiyama N, Inoue S, Saito A, Nakamura Y, Ishitsuka Y, Fujisawa Y, Watanabe R, Fujimoto M. Antihelix/helix violaceous macules in Japanese patients with anti-melanoma differentiation-associated protein 5 (MDA5) antibody-associated dermatomyositis. Br J Dermatol 2018; 180:1226-1227. [PMID: 30431155 DOI: 10.1111/bjd.17431] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- N Okiyama
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| | - S Inoue
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| | - A Saito
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| | - Y Nakamura
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| | - Y Ishitsuka
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| | - Y Fujisawa
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| | - R Watanabe
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| | - M Fujimoto
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575,, Japan
| |
Collapse
|
10
|
Koguchi-Yoshioka H, Watanabe R, Fujisawa Y, Ishitsuka Y, Nakamura Y, Okiyama N, Fujimoto M. Skin resident memory T-cell population is not constructed effectively in systemic sclerosis. Br J Dermatol 2018; 180:219-220. [PMID: 30120898 DOI: 10.1111/bjd.17100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H Koguchi-Yoshioka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - R Watanabe
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Y Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Y Ishitsuka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Y Nakamura
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - N Okiyama
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - M Fujimoto
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| |
Collapse
|
11
|
Inoue S, Okiyama N, Shobo M, Motegi S, Hirano H, Nakagawa Y, Saito A, Nakamura Y, Ishitsuka Y, Fujisawa Y, Watanabe R, Fujimoto M. Diffuse erythema with ‘angel wings’ sign in Japanese patients with anti-small ubiquitin-like modifier activating enzyme antibody-associated dermatomyositis. Br J Dermatol 2018; 179:1414-1415. [DOI: 10.1111/bjd.17026] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- S. Inoue
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - N. Okiyama
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - M. Shobo
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - S. Motegi
- Department of Dermatology, Graduate School of Medicine; Gunma University; Gunma Japan
| | - H. Hirano
- Department of Neurology; Kansai Electric Power Hospital; Osaka Japan
| | - Y. Nakagawa
- Department of Neurology; Shizuoka General Hospital; Shizuoka Japan
| | - A. Saito
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - Y. Nakamura
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - Y. Ishitsuka
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - Y. Fujisawa
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - R. Watanabe
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| | - M. Fujimoto
- Department of Dermatology, Faculty of Medicine; University of Tsukuba; Ibaraki Japan
| |
Collapse
|
12
|
Fujisawa Y, Otomo Y, Ogata Y, Nakamura Y, Fujita R, Ishitsuka Y, Watanabe R, Okiyama N, Ohara K, Fujimoto M. Deep-learning-based, computer-aided classifier developed with a small dataset of clinical images surpasses board-certified dermatologists in skin tumour diagnosis. Br J Dermatol 2018; 180:373-381. [PMID: 29953582 DOI: 10.1111/bjd.16924] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2018] [Indexed: 01/17/2023]
Abstract
BACKGROUND Application of deep-learning technology to skin cancer classification can potentially improve the sensitivity and specificity of skin cancer screening, but the number of training images required for such a system is thought to be extremely large. OBJECTIVES To determine whether deep-learning technology could be used to develop an efficient skin cancer classification system with a relatively small dataset of clinical images. METHODS A deep convolutional neural network (DCNN) was trained using a dataset of 4867 clinical images obtained from 1842 patients diagnosed with skin tumours at the University of Tsukuba Hospital from 2003 to 2016. The images consisted of 14 diagnoses, including both malignant and benign conditions. Its performance was tested against 13 board-certified dermatologists and nine dermatology trainees. RESULTS The overall classification accuracy of the trained DCNN was 76·5%. The DCNN achieved 96·3% sensitivity (correctly classified malignant as malignant) and 89·5% specificity (correctly classified benign as benign). Although the accuracy of malignant or benign classification by the board-certified dermatologists was statistically higher than that of the dermatology trainees (85·3% ± 3·7% and 74·4% ± 6·8%, P < 0·01), the DCNN achieved even greater accuracy, as high as 92·4% ± 2·1% (P < 0·001). CONCLUSIONS We have developed an efficient skin tumour classifier using a DCNN trained on a relatively small dataset. The DCNN classified images of skin tumours more accurately than board-certified dermatologists. Collectively, the current system may have capabilities for screening purposes in general medical practice, particularly because it requires only a single clinical image for classification.
Collapse
Affiliation(s)
- Y Fujisawa
- Dermatology Division, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8577
| | - Y Otomo
- Kyocera Communications System Co., Ltd, Kyoto, Japan
| | - Y Ogata
- KCCS Mobile Engineering Co., Ltd, Tokyo, Japan
| | - Y Nakamura
- Dermatology Division, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8577
| | - R Fujita
- Kyocera Communications System Co., Ltd, Kyoto, Japan
| | - Y Ishitsuka
- Dermatology Division, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8577
| | - R Watanabe
- Dermatology Division, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8577
| | - N Okiyama
- Dermatology Division, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8577
| | - K Ohara
- Dermatology, Akasaka Toranomon Clinic, Tokyo, Japan
| | - M Fujimoto
- Dermatology Division, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8577
| |
Collapse
|
13
|
Koguchi-Yoshioka H, Watanabe R, Fujisawa Y, Ishitsuka Y, Nakamura Y, Okiyama N, Clark R, Fujimoto M. 045 T cells in the skin of older individuals are diverse and highly functional. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
14
|
Ogawa T, Ishitsuka Y, Iwamoto K, Koguchi-Yoshioka H, Tanaka R, Watanabe R, Fujisawa Y, Fujimoto M. Programmed cell death 1 blockade-induced cutaneous sarcoid-like epithelioid granulomas in advanced melanoma: a case report. J Eur Acad Dermatol Venereol 2018; 32:e260-e261. [PMID: 29314333 DOI: 10.1111/jdv.14781] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- T Ogawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| | - Y Ishitsuka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| | - K Iwamoto
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| | - H Koguchi-Yoshioka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| | - R Tanaka
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| | - R Watanabe
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| | - Y Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| | - M Fujimoto
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki Prefecture, Japan
| |
Collapse
|
15
|
Ishitsuka Y, Roop D, Ogawa T, Okiyama N, Fujisawa Y, Fujimoto M. 602 The consequence of the loss of major cornified envelope protein in a mouse model of psoriasis. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
16
|
Ishitsuka Y, Rice R, Lianghua B, Leung D, Roop D. 312 Enhanced susceptibility of the epidermis to mechanical stress due to the loss of loricrin activates the Nrf2/Keap1 pathway and mediates an atopic response via direct regulation of the IL-33/ST2 pathway. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Nakamura Y, Fujisawa Y, Ishikawa M, Nakamura Y, Ishitsuka Y, Maruyama H, Furuta J, Kawachi Y, Otsuka F. Usefulness of sentinel lymph node biopsy for extramammary Paget disease. Br J Dermatol 2012; 167:954-6. [PMID: 22533523 DOI: 10.1111/j.1365-2133.2012.11017.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
18
|
Ishitsuka Y, Maniwa F, Koide C, Kato Y, Nakamura Y, Osawa T, Tanioka M, Miyachi Y. Increased halogenated tyrosine levels are useful markers of human skin ageing, reflecting proteins denatured by past skin inflammation. Clin Exp Dermatol 2012; 37:252-8. [PMID: 22409522 DOI: 10.1111/j.1365-2230.2011.04215.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Photoageing of skin is thought to be caused by protein denaturation, which can be induced by ultraviolet radiation. Previous studies have also reported that inflammation is related to protein denaturation; however, the influence of inflammation on skin ageing has not been explored in detail. AIM To investigate the possible connection between inflammation and protein denaturation, which might lead to skin ageing, we focused on halogenated tyrosine as a denatured substance produced during the inflammation process. METHODS We measured halogenated tyrosine in aged human skin. Inflammatory cells and halogenated tyrosine were detected by immunohistochemistry using antibodies to mast-cell tryptase, neutrophilic myeloperoxidase and halogenated tyrosine. Finally, using elastic van Gieson (EVG) staining, we investigated whether the sites of halogenated tyrosine coincided with the sites at which proteins were denatured. RESULTS Immunohistochemical analysis indicated that both inflammatory cells and halogenated tyrosines increased with ageing in both photoexposed and photoprotected skin. EVG staining confirmed that the localization of halogenated tyrosine was close to the sites at which protein was denatured. CONCLUSIONS Our investigations indicate a possible connection between skin ageing and inflammation, suggesting that halogenated tyrosine could be a useful marker of ageing skin.
Collapse
Affiliation(s)
- Y Ishitsuka
- Kosé Corporation Research Laboratories, Tokyo, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Nakamura Y, Nakamura Y, Ishitsuka Y, Maruyama H, Fujisawa Y, Kawachi Y, Otsuka F. Facial nerve morbidity following facial nerve preservation surgery for the treatment of skin cancer of the head and neck. J Eur Acad Dermatol Venereol 2011; 26:1323-5. [DOI: 10.1111/j.1468-3083.2011.04322.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|