1
|
Tang J, Diao P, Pan W, Li L, Xiong L. The cross-linking between DNA damage, oxidative stress and epidermal barrier in keratinocytes after exposure to particulate matters and carbon black. Exp Dermatol 2024; 33:e15048. [PMID: 38439204 DOI: 10.1111/exd.15048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 10/07/2023] [Accepted: 12/08/2023] [Indexed: 03/06/2024]
Abstract
As the largest organ, the skin provides the first line of defence against environmental pollutants. Different pollutants have varied damage to the skin due to their own physical-chemical properties. A previous epidemiological study by our team revealed that eczema was positively correlated with different air pollutants. However, the mechanism of action from different pollutants on the skin is less known. In this work, the differences among the genotoxicity, intracellular reactive oxygen species, and barrier-related parameters caused by two kinds of air pollutants, that is, S1650b and carbon black (CB) were investigated by Western blot, TUNEL, comet assay and RNA-sequences. The results indicated that both S1650b and CB caused DNA damage of keratinocytes. With the content of lipophilic polycyclic aromatic hydrocarbons (PAH), S1650b leaked into the keratinocytes easily, which activated the aromatic hydrocarbon receptor (AhR) in keratinocytes, leading to worse damage to barrier-related proteins than CB. And CB-induced higher intracellular ROS than S1650b due to the smaller size which make it enter the keratinocytes easier. RNA-sequencing results revealed that S1650b and CB both caused DNA damage of keratinocytes, and the intervention of S1650b significantly upregulated AhR, cytochrome oxidase A1 and B1 (CYP1A1 and CYP1B1) genes, while the results showed oppositely after CB intervention. The mechanism of keratinocyte damage caused by different air particle pollutants in this study will help to expand our understanding on the air pollutant-associated skin disease at cell levels.
Collapse
Affiliation(s)
- Jie Tang
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, Chengdu, China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu, China
- NMPA Key Laboratory for Human Evaluation and Big Data of Cosmetics, Sichuan University, Chengdu, China
| | - Ping Diao
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
| | - Weixi Pan
- Analytical and Metrical Center of Sichuan Province, Chengdu, China
| | - Li Li
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, Chengdu, China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu, China
- NMPA Key Laboratory for Human Evaluation and Big Data of Cosmetics, Sichuan University, Chengdu, China
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
| | - Lidan Xiong
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, Chengdu, China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu, China
- NMPA Key Laboratory for Human Evaluation and Big Data of Cosmetics, Sichuan University, Chengdu, China
| |
Collapse
|
2
|
Li J, Du D, Zhang J, Liu W, Wang J, Wei X, Xue L, Li X, Diao P, Zhang L, Jiang X. Development and validation of an artificial intelligence-powered acne grading system incorporating lesion identification. Front Med (Lausanne) 2023; 10:1255704. [PMID: 37869155 PMCID: PMC10587552 DOI: 10.3389/fmed.2023.1255704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 09/12/2023] [Indexed: 10/24/2023] Open
Abstract
Background The management of acne requires the consideration of its severity; however, a universally adopted evaluation system for clinical practice is lacking. Artificial intelligence (AI) evaluation systems hold the promise of enhancing the efficiency and reproducibility of assessments. Artificial intelligence (AI) evaluation systems offer the potential to enhance the efficiency and reproducibility of assessments in this domain. While the identification of skin lesions represents a crucial component of acne evaluation, existing AI systems often overlook lesion identification or fail to integrate it with severity assessment. This study aimed to develop an AI-powered acne grading system and compare its performance with physician image-based scoring. Methods A total of 1,501 acne patients were included in the study, and standardized pictures were obtained using the VISIA system. The initial evaluation involved 40 stratified sampled frontal photos assessed by seven dermatologists. Subsequently, the three doctors with the highest inter-rater agreement annotated the remaining 1,461 images, which served as the dataset for the development of the AI system. The dataset was randomly divided into two groups: 276 images were allocated for training the acne lesion identification platform, and 1,185 images were used to assess the severity of acne. Results The average precision of our model for skin lesion identification was 0.507 and the average recall was 0.775. The AI severity grading system achieved good agreement with the true label (linear weighted kappa = 0.652). After integrating the lesion identification results into the severity assessment with fixed weights and learnable weights, the kappa rose to 0.737 and 0.696, respectively, and the entire evaluation on a Linux workstation with a Tesla K40m GPU took less than 0.1s per picture. Conclusion This study developed a system that detects various types of acne lesions and correlates them well with acne severity grading, and the good accuracy and efficiency make this approach potentially an effective clinical decision support tool.
Collapse
Affiliation(s)
- Jiaqi Li
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Dermatology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Clinical Institute of Inflammation and Immunology, Sichuan University, Chengdu, China
- Med-X Center for Informatics, Sichuan University, Chengdu, China
| | - Dan Du
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Dermatology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Clinical Institute of Inflammation and Immunology, Sichuan University, Chengdu, China
- Med-X Center for Informatics, Sichuan University, Chengdu, China
| | - Jianwei Zhang
- Med-X Center for Informatics, Sichuan University, Chengdu, China
- College of Computer Science, Sichuan University, Chengdu, Sichuan, China
| | - Wenjie Liu
- Med-X Center for Informatics, Sichuan University, Chengdu, China
- College of Computer Science, Sichuan University, Chengdu, Sichuan, China
| | - Junyou Wang
- Med-X Center for Informatics, Sichuan University, Chengdu, China
- College of Computer Science, Sichuan University, Chengdu, Sichuan, China
| | - Xin Wei
- Med-X Center for Informatics, Sichuan University, Chengdu, China
- College of Computer Science, Sichuan University, Chengdu, Sichuan, China
| | - Li Xue
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Dermatology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Clinical Institute of Inflammation and Immunology, Sichuan University, Chengdu, China
| | - Xiaoxue Li
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Dermatology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Clinical Institute of Inflammation and Immunology, Sichuan University, Chengdu, China
| | - Ping Diao
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Dermatology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Clinical Institute of Inflammation and Immunology, Sichuan University, Chengdu, China
| | - Lei Zhang
- Med-X Center for Informatics, Sichuan University, Chengdu, China
- College of Computer Science, Sichuan University, Chengdu, Sichuan, China
| | - Xian Jiang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
- Laboratory of Dermatology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Clinical Institute of Inflammation and Immunology, Sichuan University, Chengdu, China
- Med-X Center for Informatics, Sichuan University, Chengdu, China
| |
Collapse
|
3
|
Diao P, Han C, Li X, Yang Y, Jiang X. Hematoporphyrin Monomethyl Ether Photodynamic Therapy of Port Wine Stain: Narrative Review. Clin Cosmet Investig Dermatol 2023; 16:1135-1144. [PMID: 37139084 PMCID: PMC10150768 DOI: 10.2147/ccid.s401447] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 03/20/2023] [Indexed: 05/05/2023]
Abstract
Port wine stain (PWS) is a congenital and progressive capillary malformation characterized by structural abnormalities of intradermal capillaries and postcapillary venules. The visible manifestation is often considered a disfigurement and the accompanying social stigma often causes serious emotional and physical impact. Hematoporphyrin monomethyl ether (HMME) is a newly authorized photosensitizer for treating PWS in China. Hematoporphyrin monomethyl ether photodynamic therapy (HMME-PDT) has successfully treated thousands of Chinese patients with PWS since 2017, and HMME-PDT may be one of the most promising strategies for the treatment of PWS. However, there are few reviews published about the clinical use of HMME-PDT. So in this article, we want to briefly review the mechanism, efficacy evaluation, effectiveness and influencing factors, and the common postoperative reactions and treatment suggestions of HMME-PDT in the treatment of PWS.
Collapse
Affiliation(s)
- Ping Diao
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People’s Republic of China
| | - Chenglong Han
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People’s Republic of China
| | - Xiaoxue Li
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People’s Republic of China
| | - Yi Yang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People’s Republic of China
| | - Xian Jiang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, People’s Republic of China
- Correspondence: Xian Jiang, Email
| |
Collapse
|
4
|
Li X, Diao P, Liu L, Zhou H, Yang Y, Han C, Jiang X. Hematoporphyrin Monomethyl Ether Photodynamic Therapy (HMME-PDT) for the treatment of Sturge-Weber Syndrome and Large Segmental Facial Port-wine Stain. Dermatol Ther 2022; 35:e15404. [PMID: 35199900 DOI: 10.1111/dth.15404] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/25/2022] [Accepted: 02/20/2022] [Indexed: 02/05/2023]
Abstract
Hematoporphyrin monomethyl ether (HMME) is a newly authorized photosensitizer for the treatment of port-wine stain (PWS) in China. However, no research on its efficacy for treating PWS lesions of Sturge-Weber syndrome (SWS) has been made. To assess the efficacy and safety of HMME-PDT in the treatment of SWS and simple large segmental facial PWS. Medical records of patients with SWS and large segmental facial PWS were reviewed. Efficacy was evaluated according to colour blanching and graded as excellent (≥75%), good (50-74%), fair (25-49%), and poor (≤24%). Adverse events were analysed. 19 patients with SWS and 33 patients with large segmental facial PWS were analysed. 52.6% SWS and 69.7% PWS patients (P>0.05) achieved at least 25% improvement. Common adverse events included short-term pain, edema, pruritus, exudation, and scab. No severe adverse event occurred. HMME-PDT was effective and safe for SWS and large segmental facial PWS. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Xiaoxue Li
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Ping Diao
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Liang Liu
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Hui Zhou
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Yang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Chenglong Han
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Xian Jiang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China.,Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Centre for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
5
|
Xin X, Zhang D, Zhao Y, Wang P, Diao P, Wu J, Yang F, Xu J, Orlandini L. Overview of the Dosimetry of Free Breathing and Breath Hold Forward Intensity Modulated Treatments in a Large Clinical Series of Left-Sided Breast Cancer Patients. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1441] [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]
|
6
|
Jiang Z, Diao P, Liang Y, Dai K, Li H, Wang H, Chen Y, Man L, Kuang Y. A Light Gradient Boosting Machine-Enabled Early Prediction of Cardiotoxicity for Breast Cancer Patients. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.771] [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: 10/20/2022]
|
7
|
Chen YJ, Diao P, Wan RY, Li L. Piebaldism resulting from a novel deletion mutation of KIT gene in a five-generation Chinese family. Clin Exp Dermatol 2021; 47:232-234. [PMID: 34374464 DOI: 10.1111/ced.14834] [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] [Received: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 02/05/2023]
Affiliation(s)
- Y J Chen
- Department of Dermatology and Venereology, West China Hospital, Sichuan University, Chengdu, China
| | - P Diao
- Department of Dermatology and Venereology, West China Hospital, Sichuan University, Chengdu, China
| | - R Y Wan
- Department of Dermatology and Venereology, West China Hospital, Sichuan University, Chengdu, China
| | - L Li
- Department of Dermatology and Venereology, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
8
|
Abstract
RATIONALE Tattooing is a procedure where ink is inserted typically in the intraepidermal space of the skin. Multiple incidences of viral infections following tattooing which lead to warts have been reported in recent years. The aim of this report was to show a relatively rare adverse effect after tattooing - verruca plana. PATIENT CONCERNS A 27-year-old female presented to our department with complains of multiple verrucous papules over her 2-year-old tattoo without itch. DIAGNOSES Pathological investigation confirmed the diagnosis as verruca plana. INTERVENTIONS The patient was treated with 3 cycles of liquid nitrogen cryotherapy and 5% imiquimod cream for 5 months. OUTCOMES A significant improvement in her lesions was observed after the combined treatment. LESSONS Clinically, verruca plana post-tattooing is relatively less reported. We need to combine clinical manifestations with pathological results to arrive at a definitive diagnosis. Besides, there are a large numbers of post-tattoo complications and various routes of virus inoculation. Therefore, it is important for medical professionals to caution people before considering to have a tattoo.
Collapse
|
9
|
Yan Y, Chen H, Chen L, Cheng B, Diao P, Dong L, Gao X, Gu H, He L, Ji C, Jin H, Lai W, Lei T, Li L, Li L, Li R, Liu D, Liu W, Lu Q, Shi Y, Song J, Tao J, Wang B, Wang G, Wu Y, Xiang L, Xie J, Xu J, Yao Z, Zhang F, Zhang J, Zhong S, Li H, Li H. Consensus of Chinese experts on protection of skin and mucous membrane barrier for health-care workers fighting against coronavirus disease 2019. Dermatol Ther 2020; 33:e13310. [PMID: 32170800 PMCID: PMC7228211 DOI: 10.1111/dth.13310] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 03/10/2020] [Indexed: 02/05/2023]
Abstract
Health professions preventing and controlling Coronavirus Disease 2019 are prone to skin and mucous membrane injury, which may cause acute and chronic dermatitis, secondary infection and aggravation of underlying skin diseases. This is a consensus of Chinese experts on protective measures and advice on hand‐cleaning‐ and medical‐glove‐related hand protection, mask‐ and goggles‐related face protection, UV‐related protection, eye protection, nasal and oral mucosa protection, outer ear, and hair protection. It is necessary to strictly follow standards of wearing protective equipment and specification of sterilizing and cleaning. Insufficient and excessive protection will have adverse effects on the skin and mucous membrane barrier. At the same time, using moisturizing products is highly recommended to achieve better protection.
Collapse
Affiliation(s)
- Yicen Yan
- Department of Dermatology, Peking University First Hospital, National Clinical Research Center for Skin and Immune Diseases, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Xicheng District, Beijing, China
| | - Hui Chen
- Department of Dermatology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, People's Republic of China
| | - Liuqing Chen
- Department of Dermatology, Wuhan No.1 Hospital, Wuhan, Hubei, People's Republic of China
| | - Bo Cheng
- Department of Dermatology, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China
| | - Ping Diao
- Department of Dermatology, West China Hospital of Sichuan University, Wuhou District, Chengdu City, Sichuan Province, People's Republic of China
| | - Liyun Dong
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China
| | - Xinghua Gao
- Department of Dermatology, Chinese Medical University First Hospital, Shenyang, Liaoning Province, People's Republic of China
| | - Heng Gu
- Hospital for Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, Jiangsu Province, People's Republic of China
| | - Li He
- Department of Dermatology, First Affiliated Hospital of Kunming Medical University, Wuhua District, Kunming, Yunnan Province, People's Republic of China
| | - Chao Ji
- Department of Dermatology, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, People's Republic of China
| | - Hongzhong Jin
- Department of Dermatology, Peking Union Medical College Hospital, Dongcheng District, Beijing, China
| | - Wei Lai
- Department of Dermatology, The Third Affiliated Hospital, Sun Yat-Sen University, Tianhe District, Guangzhou, Guangdong, China
| | - Tiechi Lei
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Li Li
- Department of Dermatology, West China Hospital of Sichuan University, Wuhou District, Chengdu City, Sichuan Province, People's Republic of China
| | - Liuyi Li
- Department of Infection Control, Peking University First Hospital, Xicheng District, Beijing, China
| | - Ruoyu Li
- Department of Dermatology, Peking University First Hospital, National Clinical Research Center for Skin and Immune Diseases, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Xicheng District, Beijing, China
| | - Dongxian Liu
- Department of Dermatology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, People's Republic of China
| | - Wei Liu
- Department of Dermatology, Air Force General Hospital of PLA, Haidian District, Beijing, People's Republic of China
| | - Qianjin Lu
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Ying Shi
- Department of Dermatology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Jiquan Song
- Department of Dermatology, Zhongnan Hospital of Wuhan University, Wuchang District, Wuhan, Hubei Province, China
| | - Juan Tao
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People's Republic of China
| | - Baoxi Wang
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Shijingshan District, Beijing, China
| | - Gang Wang
- Department of Dermatology, Xijing Hospital, Air Force Medical University of PLA, Xi'an, Shaanxi, China
| | - Yan Wu
- Department of Dermatology, Peking University First Hospital, National Clinical Research Center for Skin and Immune Diseases, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Xicheng District, Beijing, China
| | - Leihong Xiang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jun Xie
- Department of Dermatology, Zhongnan Hospital of Wuhan University, Wuchang District, Wuhan, Hubei Province, China
| | - Jinhua Xu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Zhirong Yao
- Department of Dermatology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Yangpu District, Shanghai, People's Republic of China
| | - Furen Zhang
- Shandong Academy of Medical Sciences, Ji'nan, Shandong Province, People's Republic of China
| | - Jianzhong Zhang
- Department of Dermatology, Peking University People's Hospital, Xicheng District, Beijing, People's Republic of China
| | - Shaomin Zhong
- Department of Dermatology, Peking University First Hospital, National Clinical Research Center for Skin and Immune Diseases, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Xicheng District, Beijing, China
| | - Hengjin Li
- Department of Dermatology, Hainan Hospital of PLA General Hospital, Sanya, Hainan Province, China
| | - Hang Li
- Department of Dermatology, Peking University First Hospital, National Clinical Research Center for Skin and Immune Diseases, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Xicheng District, Beijing, China
| |
Collapse
|
10
|
Tang J, Diao P, Shu X, Li L, Xiong L. Quercetin and Quercitrin Attenuates the Inflammatory Response and Oxidative Stress in LPS-Induced RAW264.7 Cells: In Vitro Assessment and a Theoretical Model. Biomed Res Int 2019; 2019:7039802. [PMID: 31781635 PMCID: PMC6855062 DOI: 10.1155/2019/7039802] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 08/27/2019] [Indexed: 02/05/2023]
Abstract
BACKGROUND Nowadays, atmospheric pollutants, ultraviolet rays, and other factors cause the imbalance of cell redox, resulting in skin oxidative damage. There is an interaction between inflammatory response and oxidative stress, which often involve networks of reactions and serve to amplify each other. Quercetin and quercitrin, with strong antioxidant and anti-inflammatory properties, were widely applied in cardiovascular disease, osteoporsis, pulmonary disease, etc. However, the regulation mechanism of quercetin and quercitrin on various inflammatory skin diseases is still not clear. PURPOSE In this study, quercetin and quercitrin were used to investigate whether they had anti-inflammatory and anti-ROS effects. Besides, theoretical calculation method was also adopted to preliminarily explore the mechanism of the anti-inflammatory and antioxidant effects of these two substances. METHODS CCK-8 assay was employed to investigate the cytotoxicity. The concentration of NO measured by Griess Reaction System. Moreover, the inflammatory factors (TNF-α, IL-1β, and IL-6) were reduced in LPS-stimulated RAW264.7 cells were tested by ELISA kits. The trend of ROS changes was detected by DCFH-DA method. Finally, the mechanism of the anti-inflammatory and antioxidant effects of these two substances was carried out by DMol3 package in Materials Studio. RESULTS CCK-8 assay results guided that the safe concentration of quercetin and quercitrin was lower than 15.0 μg/mL and 22.4 μg/mL, respectively. Also, the concentration of NO could significantly be inhibited by quercetin and quercitrin. Besides, the ELISA results showed that TNF-α, IL-1β, and IL-6 were reduced in LPS-stimulated RAW264.7 cells after interfering with quercetin and quercitrin. The trend of ROS changes was similar to that of inflammatory factors. Finally, the theoretical calculation illustrated that the oxygen atom on B rings may be the main site of electron cloud density changes, which may suggest a possible mechanism for the anti-inflammatory and ROS scavenging effects of quercetin and quercitrin. CONCLUSIONS This experiment shows that LPS can induce the overactivating of macrophages and the activated macrophages can subsequently induce inflammatory storms and oxidative stress. Both quercetin and quercitrin can inhibit LPS-induced macrophage inflammation and oxidative stress by experiment and theoretical calculations.
Collapse
Affiliation(s)
- Jie Tang
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, No. 5, Gong Xing Road, Chengdu, Sichuan 610041, China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu, Sichuan 610041, China
| | - Ping Diao
- Department of Dermatology, West China Hospital, Sichuan University, No. 37, Guo Xue Xiang, Chengdu, Sichuan 610041, China
| | - Xiaohong Shu
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, No. 5, Gong Xing Road, Chengdu, Sichuan 610041, China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu, Sichuan 610041, China
| | - Li Li
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, No. 5, Gong Xing Road, Chengdu, Sichuan 610041, China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu, Sichuan 610041, China
- Department of Dermatology, West China Hospital, Sichuan University, No. 37, Guo Xue Xiang, Chengdu, Sichuan 610041, China
| | - Lidan Xiong
- Cosmetics Safety and Efficacy Evaluation Center, West China Hospital, Sichuan University, No. 5, Gong Xing Road, Chengdu, Sichuan 610041, China
- Sichuan Engineering Technology Research Center of Cosmetic, Chengdu, Sichuan 610041, China
| |
Collapse
|
11
|
Vallard A, Garcia M, Espenel S, Diao P, Vial N, Guy J, ben Mrad M, Rancoule C, Rehailia Blanchard A, Pigné G, Kaczmarek D, Peoc'h M, Phelip J, langrand-Escure J, Magne N. Outcomes Prediction in Pre-Operative Radiation Therapy Locally Advanced Rectal Cancer: Leucocyte Assessment as Immune Biomarker. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.239] [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: 10/28/2022]
|
12
|
Li J, Diao P, Gong Y, Huang Q, Wen Y, Cai H, Tian H, He B, Lin B, Ji L, Guo P, Miao J, Du X. Comparison of the Clinical Efficacy Between Single-Agent and Dual-Agent Concurrent Chemoradiation Therapy in the Treatment of Unresectable Esophageal Squamous Cell Carcinoma: Multicenter Retrospective Analysis. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1000] [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: 10/18/2022]
|
13
|
Li T, Lv J, Li F, Diao P, Wang J, Li C, Liang L, Sun L. Prospective Randomized Phase 2 Study of Concurrent Chemoradiation Therapy (CCRT) Versus Chemotherapy Alone in Stage IV Esophageal Squamous Cell Carcinoma (ESCC). Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
14
|
Lagrand-Escure J, Diao P, Vallard A, Garcia M, Espenel S, Guy J, Trone J, Wang G, Rancoule C, Magné N. Radiothérapie externe et cancer rectal : facteurs prédictifs de survie et réponse histologique. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.08.040] [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: 10/21/2022]
|
15
|
Langrand-Escure J, Diao P, Vallard A, Garcia M, Espenel S, Guy J, Trone J, Ben Mrad M, Rancoule C, Magné N. Cancer du rectum métastatique synchrone : la radiothérapie au service du contrôle local. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.08.041] [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]
|
16
|
Méry B, Vallard A, Espenel S, Badie N, Thiermant M, Lambert V, Soulier V, Piqueres S, Del Santo K, Ben Mrad M, Wang G, Diao P, Langrand-Escure J, Rivoirard R, Guy JB, Guillot A, Chanelière AF, Gonthier R, Achour E, Fournel P, Magné N. Cancer de prostate des sujets âgés : place et rôle de l’évaluation gériatrique. Prog Urol 2016; 26:524-31. [DOI: 10.1016/j.purol.2016.07.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 06/13/2016] [Accepted: 07/22/2016] [Indexed: 11/30/2022]
|
17
|
Rivoirard R, Vallard A, Langrand-Escure J, Guy JB, Ben Mrad M, Yaoxiong X, Diao P, Méry B, Pigne G, Rancoule C, Magné N. [Radiotherapy phase I trials' methodology: Features]. Cancer Radiother 2016; 20:833-836. [PMID: 27449857 DOI: 10.1016/j.canrad.2016.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Revised: 05/31/2016] [Accepted: 06/03/2016] [Indexed: 10/21/2022]
Abstract
In clinical research, biostatistical methods allow the rigorous analysis of data collection and should be defined from the trial design to obtain the appropriate experimental approach. Thus, if the main purpose of phase I is to determine the dose to use during phase II, methodology should be finely adjusted to experimental treatment(s). Today, the methodology for chemotherapy and targeted therapy is well known. For radiotherapy and chemoradiotherapy phase I trials, the primary endpoint must reflect both effectiveness and potential treatment toxicities. Methodology should probably be complex to limit failures in the following phases. However, there are very few data about methodology design in the literature. The present study focuses on these particular trials and their characteristics. It should help to raise existing methodological patterns shortcomings in order to propose new and better-suited designs.
Collapse
Affiliation(s)
- R Rivoirard
- Département d'oncologie médicale, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - A Vallard
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - J Langrand-Escure
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - J-B Guy
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - M Ben Mrad
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - X Yaoxiong
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - P Diao
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - B Méry
- Département d'oncologie médicale, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - G Pigne
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - C Rancoule
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - N Magné
- Département de radiothérapie, institut de cancérologie de la Loire Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France.
| |
Collapse
|
18
|
Espenel S, Raffoux C, Vallard A, Garcia MA, Guy JB, Rancoule C, Ben Mrad M, Langrand-Escure J, Trone JC, Pigne G, Diao P, Magné N. Oxygénothérapie hyperbare et radiothérapie : entre mythe et réalité. Cancer Radiother 2016; 20:416-21. [DOI: 10.1016/j.canrad.2016.04.003] [Citation(s) in RCA: 5] [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] [Received: 03/02/2016] [Accepted: 04/01/2016] [Indexed: 11/28/2022]
|
19
|
Langrand-Escure J, Vallard A, Suchaud JP, Diao P, Magné N. [Atypical presentation of a breast cancer pituitary metastasis]. REVUE MEDICALE DE LIEGE 2016; 71:332-335. [PMID: 28383841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Pituitary metastasis occur in 1-5 % of patients with cancer. We report the discovery of a unique pituitary metastasis of breast cancer. A 67 years old woman was treated in 2003 for local adenocarcinoma. After bone metastatic relapse in 2008, the patient developed diplopia and diabetes insipidus. An MRI revealed a histologically proven metastatic pituitary nodule. Further explorations revealed failure of multiple endocrine axes. Pituitary metastases are relatively rare, but are probably under-diagnosed in the presence of advanced cancers with impaired general condition. This diagnosis should be considered in the context of cancer patients, with a recent history of diabetes insipidus, especially if the latter is associated with other neurological signs (ophthalmoplegia, cephallagia).
Collapse
Affiliation(s)
- J Langrand-Escure
- Département de Radiothérapie, Institut de Cancérologie Lucien Neuwirth, Saint Priest en Jarez, 42271 France
| | - A Vallard
- Département de Radiothérapie, Centre Hospitalier de Roanne, 42300 France
| | - J-Ph Suchaud
- Département de Radiothérapie, Institut de Cancérologie Lucien Neuwirth, Saint Priest en Jarez, 42271 France
| | - P Diao
- Département de Radiothérapie, Institut de Cancérologie Lucien Neuwirth, Saint Priest en Jarez, 42271 France
| | - N Magné
- Département de Radiothérapie, Institut de Cancérologie Lucien Neuwirth, Saint Priest en Jarez, 42271 France
| |
Collapse
|
20
|
Guy JB, Vallard A, Espenel S, Langrand-Escure J, Trone JC, Méry B, Ben Mrad M, Diao P, Mattevi C, Chargari C, Magné N. Conflict of interests for radiation oncologists: Harnessing disclosures from policy to reality. Cancer Radiother 2016; 20:176-80. [PMID: 27020716 DOI: 10.1016/j.canrad.2015.12.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 12/01/2015] [Accepted: 12/02/2015] [Indexed: 11/27/2022]
Abstract
PURPOSE An increasing attention is being paid to disclosures of conflicts of interests in the field of oncology. The purpose of this study was to examine how radiation oncologists report their conflicts of interests with pharmaceutical or technology industries. MATERIALS AND METHODS We collected the data of conflicts of interests disclosures in the abstract books from the annual 2012 and 2013 meetings of the American Society for Radiation Oncology (ASTRO) in Miami (FL, USA), and in Atlanta (GA, USA), respectively. Geographic origins of abstracts as well other factors were examined. RESULTS We identified a total of 4219 abstracts published in the past two years. The total number of involved authors was of 28,283. All of the published abstracts had conflicts of interests disclosures. Amongst them, 563 abstracts (13.4%) reported at least one potential conflict of interests, in which 1264 (4.5%) declared a potential conflict of interests in their disclosures. Geographic distribution of abstracts with financial relationship was as following: 67.9%, 15.5%, 7.7% and 7.7% for USA, Europe, Asia/Pacifica, and Canada, respectively. Abstracts with conflict of interest originated from North America in 75.6% of cases. USA distribution was 70.6% and 29.4% for Eastern and Western, respectively. CONCLUSIONS The proportion of physicians declaring financial conflicts of interests remains extremely low, whichever geographic area authors are from. In comparison to the rest of the world, the US proved itself better at declaring potential links. Changes in medical culture and education could represent a significant step to improve the process of revealing conflicts of interest in medical journal as well as in international meetings.
Collapse
Affiliation(s)
- J-B Guy
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - A Vallard
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - S Espenel
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - J Langrand-Escure
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - J-C Trone
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - B Méry
- Department of Medical Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - M Ben Mrad
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - P Diao
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - C Mattevi
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - C Chargari
- Department of Radiation Oncology, hôpital d'instruction des armées du Val-de-Grâce, boulevard de Port-Royal, 75013 Paris, France
| | - N Magné
- Department of Radiation Oncology, centre Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France.
| |
Collapse
|
21
|
Espenel S, Vallard A, Langrand-Escure J, Ben Mrad M, Méry B, Rivoirard R, Moriceau G, Guy JB, Trone JC, Moncharmont C, Wang G, Diao P, Bernichon É, Chanal É, Fournel P, Magné N. [Carcinomatous meningitis: The radiation therapist's point of view]. Cancer Radiother 2016; 20:54-9. [PMID: 26867467 DOI: 10.1016/j.canrad.2015.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 09/09/2015] [Accepted: 09/11/2015] [Indexed: 11/28/2022]
Abstract
Carcinomatous meningitis complicates 5 to 10% of cancers, essentially with breast cancers, lung cancers and melanomas. The incidence probably increased because of therapeutic advances in oncology. Treatment is based on external beam radiotherapy, systemic treatment, intrathecal chemotherapy and supportive care. The aim of this work was to review data on external radiation therapy and carcinomatous meningitis. There are few evidences on the subject, but it is a major topic of interest. A whole brain radiation therapy is indicated in case of brain metastases or clinical encephalitis. Focal radiation therapy is recommended on symptomatic, bulky or obstructive sites. The dose depends on performance status (20 to 40 Gy in five to 20 fractions), volume to treat and available techniques (classic fractionation or hypofractionation via stereotactic radiosurgery). The objective of radiation therapy is to improve quality of life. Association with systemic therapy improves overall survival. Administration of sequential intrathecal chemotherapy may also improve overall survival, but induces more toxicity. The use of new radiotherapy techniques and development of radiosensitizing molecules in patients with good performance status could improve survival in this frequent complication of cancer.
Collapse
Affiliation(s)
- S Espenel
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - A Vallard
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - J Langrand-Escure
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - M Ben Mrad
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - B Méry
- Département d'oncologie médicale, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - R Rivoirard
- Département d'oncologie médicale, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - G Moriceau
- Département d'oncologie médicale, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - J-B Guy
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - J-C Trone
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - C Moncharmont
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - G Wang
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - P Diao
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - É Bernichon
- Département d'oncologie médicale, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - É Chanal
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - P Fournel
- Département d'oncologie médicale, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France
| | - N Magné
- Département de radiothérapie, institut de cancérologie Lucien-Neuwirth, 108 bis, avenue Albert-Raimond, BP 60008, 42271 Saint-Priest-en-Jarez cedex, France.
| |
Collapse
|
22
|
Espenel S, Vallard A, Langrand-Escure J, Ben Mrad M, Méry B, Rivoirard R, Moriceau G, Guy JB, Trone JC, Moncharmont C, Wang G, Diao P, Bernichon É, Chanal É, Fournel P, Magné N. Méningite carcinomateuse : le point de vue de l’oncologue radiothérapeute. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.01.008] [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: 10/22/2022]
|
23
|
Espenel S, Vallard A, Langrand-Escure J, Ben Mrad M, Méry B, Rivoirard R, Moriceau G, Guy JB, Trone JC, Moncharmont C, Wang G, Diao P, Bernichon É, Chanal É, Fournel P, Magné N. Méningite carcinomateuse : le point de vue de l’oncologue radiothérapeute. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.01.009] [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: 10/22/2022]
|
24
|
Wang YH, Zhou X, Shan JG, Zhou DJ, Diao P, Li Y, Zhao Y, Li CR. [Molecular epidemiological study of adult rotavirus infection diarrhea in Wuhan City]. Zhonghua Liu Xing Bing Xue Za Zhi 2004; 25:818. [PMID: 15555371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- Yuan-hong Wang
- Wuhan City of Center for Disease Control and Prevention, Wuhan 430022, China
| | | | | | | | | | | | | | | |
Collapse
|
25
|
Diao P, Jiang D, Cui X, Gu D, Tong R, Zhong B. Unmodified supported thiol/lipid bilayers: studies of structural disorder and conducting mechanism by cyclic voltammetry and AC impedance. Bioelectrochem Bioenerg 1999; 48:469-75. [PMID: 10379570 DOI: 10.1016/s0302-4598(99)00038-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Supported thiol/lipid bilayer assembly, one of the most spectacular bilayer systems in recent years, has provided a good model to study biomembranes because of its high mechanical stability. In this work, the structural and conducting property of unmodified Au supported octadecanethiol/phosphatidylcholine bilayers were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The forming process of bilayer was monitored by capacitance plane plot. The normalized membrane capacitance of supported bilayer is 0.52 microF cm(-2). Kinetically controlled voltammograms determined by Butler-Volmer equation were obtained for both thiol monolayer and thiol/lipid bilayer in linear sweep voltammetry. Results of EIS experiment indicate that collapsed sites and pinhole defects exist in thiol monolayer and lipid monolayer, respectively. The difference between the values of experimental and theoretical standard electron transfer rate constant indicates that the conducting mechanism of Au supported thiol monolayer is electron tunneling at collapsed sites. The conducting mechanism of Au supported thiol/lipid bilayer is attributed as the following: the electroactive species could diffuse through pinholes in the lipid monolayer and reach collapsed sites in thiol monolayer, where electron transfer occurs via a tunneling process. The fractional coverage of the lipid monolayer measure by EIS experiments is about 0.98 or higher.
Collapse
Affiliation(s)
- P Diao
- Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan
| | | | | | | | | | | |
Collapse
|
26
|
Cui X, Jiang D, Diao P, Li J, Tong R, Wang X. Electron transfer between ferrocene-modified Au/octadecanethiol/lipid BLM electrode and redox couples in solution. Bioelectrochem Bioenerg 1999; 48:243-7. [PMID: 10228595 DOI: 10.1016/s0302-4598(98)00202-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Bilayers incorporated with ferrocene consisting of self-assembled octadecanethiol and lipid monolayer on gold substrates were fabricated. Its electrochemical behaviors in solutions containing different redox couples were investigated by cyclic voltammetry and ac impedance. The transmembrane electron transfer reaction across octadecanethiol self-assembled film and an adsorbed phospholipid layer mediated by ferrocene have been observed in the solution of Fe(CN)6(3-/4-). The formal potential difference between mediator in bilayer lipid membrane (BLM) and redox couple in solution has a great impact on the transmembrane electron transfer behavior. The ferrocene-modified BLM electrodes might be useful for constructing a bilayer-based electrochemical current rectifying device.
Collapse
Affiliation(s)
- X Cui
- Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan, China
| | | | | | | | | | | |
Collapse
|