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Xu H, Wang Y, Fu X, Wang D, Luan Q. Urban Flood Modeling and Risk Assessment with Limited Observation Data: The Beijing Future Science City of China. Int J Environ Res Public Health 2023; 20:4640. [PMID: 36901653 PMCID: PMC10002264 DOI: 10.3390/ijerph20054640] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/24/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
The frequency of urban storms has increased, influenced by the climate changing and urbanization, and the process of urban rainfall runoff has also changed, leading to severe urban waterlogging problems. Against this background, the risk of urban waterlogging was analyzed and assessed accurately, using an urban stormwater model as necessary. Most studies have used urban hydrological models to assess flood risk; however, due to limited flow pipeline data, the calibration and the validation of the models are difficult. This study applied the MIKE URBAN model to build a drainage system model in the Beijing Future Science City of China, where the discharge of pipelines was absent. Three methods, of empirical calibration, formula validation, and validation based on field investigation, were used to calibrate and validate the parameters of the model. After the empirical calibration, the relative error range between the simulated value and the measured value was verified by the formula as within 25%. The simulated runoff depth was consistent with a field survey verified by the method of validation based on field investigation, showing the model has good applicability in the study area. Then, the rainfall scenarios of different return periods were designed and simulated. Simulation results showed that, for the 10-year return period, there are overflow pipe sections in northern and southern regions, and the number of overflow pipe sections in the northern region is more than that in the southern region. For the 20-year return period and 50-year return period, the number of overflow pipe sections and nodes in the northern region increased, while for the 100-year return period, the number of overflow nodes both increased. With the increase in the rainfall return period, the pipe network load increased, the points and sections prone to accumulation and waterlogging increased, and the regional waterlogging risk increased. The southern region is prone to waterlogging because the pipeline network density is higher than that in the northern region and the terrain is low-lying. This study provides a reference for the establishment of rainwater drainage models in regions with similar database limitations and provides a technical reference for the calibration and validation of stormwater models that lack rainfall runoff data.
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Affiliation(s)
- Huan Xu
- College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056021, China
| | - Ying Wang
- North China Municipal Engineering Design and Research Institute Co., Ltd., Tianjin 300074, China
| | - Xiaoran Fu
- College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056021, China
- National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China
| | - Dong Wang
- Hebei Provincial Research Center of Water Ecological Civilization & Social Governance, Handan 056021, China
| | - Qinghua Luan
- Key Laboratory of Flood Disaster Prevention and Control of the Ministry of Emergency Management in China, Hohai University, Nanjing 210024, China
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Gao X, Sun M, Luan Q, Zhao X, Wang J, He G, Zhao Y. The spatial and temporal evolution of the actual evapotranspiration based on the remote sensing method in the Loess Plateau. Sci Total Environ 2020; 708:135111. [PMID: 31810704 DOI: 10.1016/j.scitotenv.2019.135111] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 10/16/2019] [Accepted: 10/20/2019] [Indexed: 06/10/2023]
Abstract
Due to the joint impact of climate change and human activities, vegetation cover area in Loess Plateau has been tremendously improved. However, vegetation restoration will lead to high water use, which might pose a great threat to the water sustainability of regional ecosystems. In order to analyze the spatiotemporal characteristics of water consumption, this study estimated the actual evapotranspiration (AET) based on the SEBAL model. The study found that precipitation and AET increased significantly (5% confidence level) with the rising of vegetation coverage in the period of 1990-2015. The increase rate of precipitation was 1.91 mm/a, higher than that of AET (1.68 mm/a). From a spatial perspective, the AET of Loess Plateau is increasing from northwest to southeast. The high-AET area (AET > 400 mm) was also extremely enlarged from 39% (1990) to 73% (2015) with the vegetation recovery. In terms of the intra-annual variability, the AET from March to April is usually much higher than the precipitation in different hydrological years, which suggests that the spring drought is a potential threat for vegetation growth in Loess Plateau. At last, this study introduced an index of rainwater utilization potential indicator (IRUP) to analyze the water supply and demand in Loess Plateau. It found that IRUP values are positively correlated with NDVI (Normalized Difference Vegetation Index), indicating that the available water for vegetation growth is seemingly increasing with the vegetation cover area enlarged in the whole region.
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Affiliation(s)
- Xuerui Gao
- Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Miao Sun
- College of water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Qinghua Luan
- College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan, Hebei 056038, China.
| | - Xining Zhao
- Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Jichao Wang
- College of water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Guohua He
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
| | - Yong Zhao
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
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Xing SG, Zhang KJ, Qu JH, Ren YD, Luan Q. Propofol induces apoptosis of non-small cell lung cancer cells via ERK1/2-dependent upregulation of PUMA. Eur Rev Med Pharmacol Sci 2019; 22:4341-4349. [PMID: 30024623 DOI: 10.26355/eurrev_201807_15431] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Propofol is one of the most commonly used intravenous anesthetic agents used in cancer resections, but the effect of propofol on non-small cell lung cancer (NSCLC) remains unclear. Previous researches have reported that propofol can inhibit extracellular signal-regulated kinase (ERK) 1/2 phosphorylation or activate p53-upregulated modulator of apoptosis (PUMA) signaling, resulting in apoptosis. In addition, PUMA is negatively regulated by ERK1/2 activation. In the present work, we determined the effect of propofol on NSCLC A549 cells and explored its signaling pathway. MATERIALS AND METHODS A549 cells were treated with different concentrations of propofol (1-10 μg/mL) for 6 h. After washing, cells were cultured in Dulbecco's Modified Eagle Medium supplemented with 10% fetal bovine serum and antibiotics for another 72 h. Cell survival and apoptosis were determined by MTT, flow cytometry, and TUNEL analyses. To assess whether propofol functions via ERK1/2 and PUMA signaling pathways, A549 cells were transfected with small interfering RNA (siRNA) to target PUMA, or treated with human recombinant ERK1/2 (hrERK1/2) to activate ERK1/2. RESULTS Propofol treatment inhibited viability and induced apoptosis of A549 cells in a dose-dependent manner in vitro. Propofol inhibited phosphorylation of ERK1/2 (pERK1/2) and increased ERK1/2-dependent PUMA expression. Knockdown of PUMA by siRNA or treatment with hrERK1/2 to activate ERK1/2 blocked propofol-induced apoptosis and cell viability. Upregulation of PUMA expression by propofol requires pERK1/2 inactivation. CONCLUSIONS Propofol inhibits viability and induces apoptosis of A549 cells via an ERK1/2-dependent PUMA signaling.
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Affiliation(s)
- S-G Xing
- Department of Respiratory, the Central Hospital of Linyi, Yishui, Linyi, Shandong, China.
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Abstract
This is the first comprehensive study of the genetic analysis of the majority of oleoresin components of slash pine (Pinus elliottii). Pine oleoresin, the resin secreted from the pine tree, is a raw material widely used in industrial products. The objective of this study was to explore the genetic variation and correlation between the major oleoresin components of 50 open pollinated families of slash pine. The individual narrow-sense heritability of the 23 oleoresin components and genetic correlations between them were estimated using the residual maximum likelihood in the flexible mixed modeling program, ASReml-R. A high heritability of 0.424 was observed for β-pinene. Moderate levels of heritability were estimated for β-phellandrene, methyl abietate, estragole, 15-hydroxy-dehydroabietic acid, and isopimaric acid methyl ester at 0.303, 0.294, 0.27, 0.258, and 0.2, respectively. The heritabilities for pimaric acid methyl ester, abieta-8, 13-diene-18-oic acid methyl ester, sandaracopimaric acid, methyl ester, and camphene were relatively low and ranged from 0.11 to 0.17. Many negative genetic correlations were observed as unfavorable while the corresponding phenotypic correlations presented no significant relationships or positive phenotypic correlations. However, the heritabilities and genetic correlations showed that single or multiple component selections and improvement, directly or indirectly, were effective. We postulate that genetic parameters estimated in this study will work as a reference in breeding programs of oleoresin components, especially in slash pine.
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Affiliation(s)
- S Zhang
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
| | - J Jiang
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
| | - Q Luan
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
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Gao W, Wang X, Wang X, Cai Y, Luan Q. Association of cognitive function with tooth loss and mitochondrial variation in adult subjects: a community-based study in Beijing, China. Oral Dis 2016; 22:697-702. [PMID: 27353124 DOI: 10.1111/odi.12529] [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: 02/17/2016] [Revised: 06/12/2016] [Accepted: 06/21/2016] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Cognitive impairment is a common neurological problem in elderly people. In this study, we investigated whether tooth loss, periodontal parameters, and gene variations in the mitochondrial DNA displacement loop region are potential influencing factors on cognitive function. DESIGN We employed a linear regression model to estimate cross-sectional association between number of teeth lost, periodontal parameters and Mini-mental State Examination score, adjusting for demographic factors, socioeconomic factors, general health status, smoking, drinking, and life habits. PARTICIPANTS A total of 905 Han Chinese people, ≥50 years of age, with complete data, were enrolled. Blood samples of 567 of the subjects were analyzed for correlation between mitochondrial DNA variants and Mini-mental State Examination score. RESULTS The number of teeth lost (β = -0.042, 95% CI: -0.061, -0.024, P < 0.001), two single nucleotide polymorphism (SNP) points: A189G (β = -1.540, 95% CI: -2.818, -0.263, P = 0.018) and A16164G (β = -1.053, 95% CI: -2.054, -0.052, P = 0.039) in the mitochondrial DNA displacement loop region, and haplogroup Y (β = -2.152, 95% CI: -4.062, -0.242, P = 0.027) were found to be negatively associated with Mini-mental State Examination scores in the fully adjusted model. No correlation was found between periodontal parameters and Mini-mental State Examination scores. CONCLUSION Number of teeth lost, mitochondrial SNPs, and haplogroup Y were correlated with cognitive function in this study population.
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Affiliation(s)
- W Gao
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - X Wang
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - X Wang
- Department of Genetics, Beijing Hypertension League Institute, Beijing, China
| | - Y Cai
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Q Luan
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China.
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Shi Q, Wang H, Guo W, Yang Y, Zhang W, Guo S, Zhao T, Liu L, Jian Z, Luan Q, Liu L, Wang G, Gao T, Li C. 621 Down-regulated mir-23a contributes to invasion and metastasis of cutaneous melanoma by promoting autophagy. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ge R, Liu L, Dai W, Zhang W, Yang Y, Wang H, Shi Q, Guo S, Yi X, Wang G, Gao T, Luan Q, Li C. 652 XPA promotes autophagy to facilitate cisplatin resistance in melanoma cells through the activation of PARP1. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.693] [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] [Indexed: 11/28/2022]
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Wang G, Wang Y, Zhang J, Luan Q, Ma Y, Hao H. Modeling and Simulation of Thermodynamic Properties of l-Alanyl-l-Glutamine in Different Solvents. Ind Eng Chem Res 2014. [DOI: 10.1021/ie404081c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [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)
- Guan Wang
- School of Chemical Engineering and Technology, and ‡Tianjin Key Laboratory
of Modern
Drug Delivery and High-Efficiency, Tianjin University, Tianjin 300072, China
| | - Yongli Wang
- School of Chemical Engineering and Technology, and ‡Tianjin Key Laboratory
of Modern
Drug Delivery and High-Efficiency, Tianjin University, Tianjin 300072, China
| | - Jie Zhang
- School of Chemical Engineering and Technology, and ‡Tianjin Key Laboratory
of Modern
Drug Delivery and High-Efficiency, Tianjin University, Tianjin 300072, China
| | - Qinghua Luan
- School of Chemical Engineering and Technology, and ‡Tianjin Key Laboratory
of Modern
Drug Delivery and High-Efficiency, Tianjin University, Tianjin 300072, China
| | - Youguang Ma
- School of Chemical Engineering and Technology, and ‡Tianjin Key Laboratory
of Modern
Drug Delivery and High-Efficiency, Tianjin University, Tianjin 300072, China
| | - Hongxun Hao
- School of Chemical Engineering and Technology, and ‡Tianjin Key Laboratory
of Modern
Drug Delivery and High-Efficiency, Tianjin University, Tianjin 300072, China
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Li Q, Jiao B, Zhou F, Tan Q, Ma Y, Luo L, Zhai J, Luan Q, Li C, Wang G, Gao T. Comparative study of photodynamic therapy with 5%, 10% and 20% aminolevulinic acid in the treatment of generalized recalcitrant facial verruca plana: a randomized clinical trial. J Eur Acad Dermatol Venereol 2013; 28:1821-6. [PMID: 24267796 DOI: 10.1111/jdv.12319] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 10/11/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND Generalised recalcitrant facial verruca plana responds poorly to current therapeutic options, including cryotherapy, topical drugs and carbon dioxide (CO2 ) laser. Case reports and uncontrolled studies suggested that topical photodynamic therapy (PDT) is effective choice of treatment free from potential complications associated with invasive therapies. AIMS To investigate the efficacy and safety of PDT with different concentrations of photosensitiser in the treatment of verruca plana. MATERIALS & METHODS The two sides of a subject's face were separately randomized to receive aminolevulinic acid (ALA) of 5%, 10% or 20% concentration. All patients were irradiated with 633-nm red light for 339 J/cm(2) total dose. Complete response (CR) rate was assessed on Week 4, 8, and 16 respectively. RESULTS The mean overall clearance rate was 74.1%, 68.8%, and 64.6% on Week 4, 8, and 12, respectively, in the 110 treated sides. The CR rate was lower in the 5%-ALA group than in the 10%-ALA group (14.3% vs. 33.3%, p < 0.05) and 20%-ALA group (14.3% vs. 26.3%, p < 0.05) after 12 weeks. The mean severity of pain measured by visual analogue scale (VAS) scoring was 3.8 (range: 2 to 10, depending on the lesion location). The overall recurrence rate was 16.7% (4/24) on Week 12. Hyperpigmentation was observed in 61% (67/110) of all treated sides. On Week 4, 8, and 16, hyperpigmentation was more developed in the 20%-ALA group than in the other two groups (p < 0.05). DISCUSSION In terms of complete clearance rate, the 5% ALA-PDT group was significantly inferior to the 10% and 20% ALA-PDT groups at each follow-up. In contrast, the 20% ALA group showed a higher incidence rate of transient hyperpigmentation than the other two groups. CONCLUSIONS This randomised clinical trial suggests that PDT with ALA of 10% concentration offers better efficacy and safety than 5% or 20% concentration for generalised recalcitrant facial verruca plana.
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Affiliation(s)
- Q Li
- Department of Dermatology at Xijing Hospital, Fourth Military Medical University, Xi'an, China
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Wang X, Luan Q, Chen Q, Zhao L, Guo Y. Mitochondrial polymorphisms and dysfunction related to aggressive periodontitis: a pilot study. Oral Dis 2013; 20:490-8. [PMID: 23902412 DOI: 10.1111/odi.12163] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/27/2013] [Accepted: 06/18/2013] [Indexed: 11/28/2022]
Affiliation(s)
- X Wang
- Department of Periodontology Peking University School and Hospital of Stomatology Beijing China
| | - Q Luan
- Department of Periodontology Peking University School and Hospital of Stomatology Beijing China
| | - Q Chen
- State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Chaoyang District Beijing China
| | - L Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Chaoyang District Beijing China
| | - Y Guo
- Department of Periodontology Peking University School and Hospital of Stomatology Beijing China
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Zhang N, Wang L, Zhu GN, Sun DJ, He H, Luan Q, Liu L, Hao F, Li CY, Gao TW. The association between trauma and melanoma in the Chinese population: a retrospective study. J Eur Acad Dermatol Venereol 2013; 28:597-603. [PMID: 23465057 DOI: 10.1111/jdv.12141] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Accepted: 02/18/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND The association between trauma and melanoma has been a controversial issue. OBJECTIVES To analyse the profiles of melanoma, and to determine whether trauma is associated with development of acral melanoma in the Chinese population. PATIENTS AND METHODS Retrospective analysis of 685 cases of cutaneous melanoma in the dermatology departments of Xijing Hospital in northwestern China and Xinan Hospital in southwestern China from 1982 to 2011. RESULTS Of the 685 patients included in the study, 437 (63.8%) suffered from melanoma on the extremities. A total of 104 patients (15.2%) exhibited an association between trauma and melanoma. The primary anatomic sites of the tumours were the upper extremities (17, 16.3%), lower extremities (74, 71.2%) and other sites (13, 12.5%). Among these cases, the extremities were with remarkably higher risks of post-trauma melanoma than the other sites [adjusted odds ratio (OR) 3.968; 95% confidence interval (CI) 2.267-5.592]. Notably, patients in the south part of China were with a stronger risk of post-trauma melanoma on the lower extremities than those in the north (adjusted OR 1.764; 95% CI 1.192-2.666) part. In addition, a significant higher risk of post-trauma melanoma on the extremities was observed in the male gender (adjusted OR 1.848; 95% CI 1.186-2.887). CONCLUSIONS Our findings provide epidemiological evidence for a potential association between traumatic events and melanoma of the extremities, especially the lower limbs, where a history of trauma is more likely.
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Affiliation(s)
- N Zhang
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
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Abstract
BACKGROUND Vitamin D and its metabolites play an important role in calcium homeostasis, bone remodelling, hormone secretion, cell proliferation and differentiation. Recent studies also suggest a beneficial role of vitamin D in slowing the progression of tissue fibrosis. However, their effects on dermal fibrosis and keloids are unknown. Objectives To investigate the effect of 1,25-dihydroxyvitamin D3 (1,25D) in the pathogenesis of tissue fibrosis by keloid fibroblasts (KFs). METHODS KFs were cultured and exposed to different concentrations of 1,25D in the presence or absence of transforming growth factor (TGF)-β1. KF phenotypes and protein production were analysed by real-time reverse transcriptase-polymerase chain reaction, Western blot, immunofluorescence and multiplex enzyme-linked immunosorbent assay techniques. Collagen synthesis was evaluated by measuring (3) H-proline incorporation. The effect of 1,25D on cell proliferation and viability was evaluated by Formazan assay, proliferating cell nuclear antigen expression and the colorimetric conversion of 3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide. RESULTS We confirmed the presence of vitamin D receptors (VDRs) in cultured keloid fibroblasts. Fibroblasts transfected with a vitamin D response element reporter construct and exposed to the active vitamin D metabolite 1,25D showed increased promoter activity indicating VDR functionality in these cells. Incubation of KFs with 1,25D suppressed TGF-β1-induced collagen type I, fibronectin and α-smooth muscle actin expression. 1,25D also modulated plasminogen activator inhibitor-1 and matrix metalloproteinase-9 expression induced by TGF-β1. Interestingly, 1,25D induced hepatocyte growth factor mRNA expression and protein secretion in keloid fibroblasts. CONCLUSIONS This study highlights key mechanistic pathways through which vitamin D decreases fibrosis, and provides a rationale for studies to test vitamin D supplementation as a preventive and/or early treatment strategy for keloid and related fibrotic disorders.
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Affiliation(s)
- G Y Zhang
- Department of Hand and Plastic Surgery, the 2nd Affiliated Hospital of Wenzhou Medical College, Xueyuan West Road 109, Wenzhou 325027, Zhejiang Province, China.
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Lv YJ, Liao WJ, Luan Q, Wang H, Wang L, Li Q. The polymorphism of catalase T/C codon 389 in exon 9 and vitiligo susceptibility: a meta-analysis. J Eur Acad Dermatol Venereol 2010; 25:955-8. [PMID: 21054578 DOI: 10.1111/j.1468-3083.2010.03897.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND The exact aetiology of vitiligo has not yet been established. Oxidative stress is involved in the pathophysiology of vitiligo. It has been described that some polymorphisms in the catalase (CAT) gene may affect the risk of vitiligo. However, the results were inconsistent. OBJECTIVE We performed a meta-analysis of the published studies to derive a more precise estimate of the association between CAT T/C at codon 389 in exon 9 polymorphisms and vitiligo risk. METHODS The PubMed, Medline, Cochrane Library, China National Knowledge Infrastructure (CNKI) databases were searched to identify relevant published studies. RESULTS Four case-control studies (cases, 645; controls, 689) that investigated the association between C/T polymorphisms of CAT exon 9 and the risk of vitiligo were retrieved and analysed. Our findings suggested a significant association between the CAT T/C exon 9 polymorphism and vitiligo risk (CT + TT vs. CC pooled odds ratio, 1.43; 95% confidence interval, 1.14-1.80; P = 0 .002). CONCLUSION We found a significant correlation between the CAT T/C exon 9 polymorphism and the risk of vitiligo.
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Affiliation(s)
- Y J Lv
- Department of Dermatology, Xijing Hospital, Fourth Military Medical University, Shaanxi Province, China
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14
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Abstract
Innate immunity plays an important role in psoriasis. The possible role of Toll-like receptors (TLRs) in the activation of innate immunity in psoriasis remains unknown. Serum antikeratin 16 (anti-K16) autoantibody levels are raised in patients with psoriasis. The aim of this study was to investigate the effects of anti-K16 antibodies on TLR2 and TLR4 expression in keratinocytes. Keratinocytes were incubated with mouse anti-K16 monoclonal antibodies. Levels of TLR2 and TLR4 were measured by quantitative real-time PCR and flow cytometry. TLR2 mRNA level was increased by 1.73-fold, 1.60-fold and 2.52-fold at 6, 24 and 36 h after incubation, respectively. TLR4 mRNA level was increased by 3.62-fold and 2.21-fold at 12 and 36 h, respectively. TLR2 protein expression was increased by 1.73-fold on the cell membrane and 2.22-fold in cell membrane and intracytoplasmic locations. There was no change in TLR4. The results of this study indicate that anti-K16 antibodies may be a modulator of TLRs.
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Affiliation(s)
- C Wu
- Department of Dermatology, Huashan Hospital, Medical College, Fudan University, Shanghai, China
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15
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Luan Q, Desta T, Chehab L, Sanders V, Plattner J, Graves D. Inhibition of Experimental Periodontitis by a Topical Boron-based Antimicrobial. J Dent Res 2008; 87:148-52. [DOI: 10.1177/154405910808700208] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AN0128 is a boron-containing compound with antibacterial and anti-inflammatory properties. To test its potential effectiveness in treating periodontal disease, we induced experimental periodontitis in the rat by placing ligatures and assessed the impact of AN0128 and positive and negative controls by micro-CT and histologic measurements. The formation of an inflammatory infiltrate was measured in hematoxylin-and-eosin-stained sections. Daily application of AN0128 (1%) compared with controls reduced bone loss by 38 to 44% (P < 0.05), while vehicle alone had no effect (P > 0.05). The reduction in bone loss with AN0128 was similar to that achieved with a NSAID, ketorolac, and Total toothpaste containing triclosan. AN0128 also reduced the level of gingival inflammation 42% compared with the ligature only (P < 0.05), whereas vehicle alone had no effect (P > 0.05). The results indicate that AN0128 significantly reduces the formation of an inflammatory infiltrate and reduces bone loss, measured histologically and by micro-CT.
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Affiliation(s)
- Q. Luan
- Department of Periodontology and Oral Biology, Boston University School of Dental Medicine, Boston, MA 02118, USA
- Anacor Pharmaceuticals, Inc., Palo Alto, CA 94303, USA
- Department of Periodontology, Peking University School of Stomatology, Beijing, China 100081
| | - T. Desta
- Department of Periodontology and Oral Biology, Boston University School of Dental Medicine, Boston, MA 02118, USA
- Anacor Pharmaceuticals, Inc., Palo Alto, CA 94303, USA
- Department of Periodontology, Peking University School of Stomatology, Beijing, China 100081
| | - L. Chehab
- Department of Periodontology and Oral Biology, Boston University School of Dental Medicine, Boston, MA 02118, USA
- Anacor Pharmaceuticals, Inc., Palo Alto, CA 94303, USA
- Department of Periodontology, Peking University School of Stomatology, Beijing, China 100081
| | - V.J. Sanders
- Department of Periodontology and Oral Biology, Boston University School of Dental Medicine, Boston, MA 02118, USA
- Anacor Pharmaceuticals, Inc., Palo Alto, CA 94303, USA
- Department of Periodontology, Peking University School of Stomatology, Beijing, China 100081
| | - J. Plattner
- Department of Periodontology and Oral Biology, Boston University School of Dental Medicine, Boston, MA 02118, USA
- Anacor Pharmaceuticals, Inc., Palo Alto, CA 94303, USA
- Department of Periodontology, Peking University School of Stomatology, Beijing, China 100081
| | - D.T. Graves
- Department of Periodontology and Oral Biology, Boston University School of Dental Medicine, Boston, MA 02118, USA
- Anacor Pharmaceuticals, Inc., Palo Alto, CA 94303, USA
- Department of Periodontology, Peking University School of Stomatology, Beijing, China 100081
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Liu R, Bal H, Desta T, Krothapalli N, Alyassi M, Luan Q, Graves D. Diabetes enhances periodontal bone loss through enhanced resorption and diminished bone formation. J Dent Res 2006; 85:510-4. [PMID: 16723646 PMCID: PMC2253683 DOI: 10.1177/154405910608500606] [Citation(s) in RCA: 193] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Using a ligature-induced model in type-2 Zucker diabetic fatty (ZDF) rat and normoglycemic littermates, we investigated whether diabetes primarily affects periodontitis by enhancing bone loss or by limiting osseous repair. Diabetes increased the intensity and duration of the inflammatory infiltrate (P < 0.05). The formation of osteoclasts and percent eroded bone after 7 days of ligature placement was similar, while four days after removal of ligatures, the type 2 diabetic group had significantly higher osteoclast numbers and activity (P < 0.05). The amount of new bone formation following resorption was 2.4- to 2.9-fold higher in normoglycemic vs. diabetic rats (P < 0.05). Diabetes also increased apoptosis and decreased the number of bone-lining cells, osteoblasts, and periodontal ligament fibroblasts (P < 0.05). Thus, diabetes caused a more persistent inflammatory response, greater loss of attachment and more alveolar bone resorption, and impaired new bone formation. The latter may be affected by increased apoptosis of bone-lining and PDL cells.
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Shibutani T, Inuduka A, Horiki I, Luan Q, Iwayama Y. Bisphosphonate inhibits alveolar bone resorption in experimentally-induced peri-implantitis in dogs. Clin Oral Implants Res 2001; 12:109-14. [PMID: 11251659 DOI: 10.1034/j.1600-0501.2001.012002109.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to determine the effect of bisphosphonate on alveolar bone resorption in experimentally-induced peri-implantitis in beagle dogs. Experimental peri-implantitis was induced by ligation around the abutments, 6 months after placement of a fixture. Pamidronate (0.6 mg/kg) was injected intramuscularly every 3 days into each of 5 dogs. Another 5 dogs served as the control group and were injected with saline only. Peripheral blood and urine samples were collected every week up to 12 weeks after placement of the ligature. Standard X-rays were taken every week. Urinary deoxypyridinoline (DPD) and serum osteocalcin (OC) were evaluated by ELISA as markers of alveolar bone remodeling. X-ray films were analyzed with a computer image analyzer. After 12 weeks, the bone level was measured after removal of the gingival flap. The distance between the top surface of the fixture and the fundus of the defect was significantly lower in the Pamidronate group (1.59+/-0.55 mm, mean+/-SD) than in the control group (2.41+/-0.48 mm). Bone density analyzed from the X-ray films was significantly higher in the bisphosphonate group (69.2+/-8.7%, mean+/-SD) than in the control group (50.3+/-12.8%) after 2 to 8 weeks compared with the baseline value (100%). OC and DPD levels fluctuated during the experimental period. These findings suggest that bisphosphonate inhibits the progression of alveolar bone resorption during ligature-induced peri-implantitis in dogs.
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Affiliation(s)
- T Shibutani
- Department of Periodontology, Asahi University, Gifu, Japan.
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Luan Q, Toshiaki S, Katsunori M. [The chemotactic response of gingival fibroblasts and periodontal ligament cells to interleukin-8]. Zhonghua Kou Qiang Yi Xue Za Zhi 2001; 36:40-1. [PMID: 11812302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To evaluate the chemotactic response of gingival fibroblasts and periodontal ligament cells to interleukin-8. METHODS The passage 6 cultured gingival fibroblasts and periodontal ligament cells (2.5 x 10(8) cell/L, respective) were placed in the upper compartment of the Transwell cell culture chamber. The lower compartment contained IL-8 with the concentrations of 10(-10), 10(-9), 10(-8), 10(-7) mol/L, respectively. Incubation was at 37 degrees C in an atmosphere of 95% air and 5% CO2 for 24 h. The number of migrated cells were counted under high power fields. RESULTS IL-8 at concentrations ranged from 10(-9)-10(-7) mol/L promoted the chemotactic movement of gingival fibroblasts in a dose-dependent manner. However, at the same IL-8 concentrations the chemotactic movement of periodontal ligament cells was not elevated. CONCLUSION IL-8 may play its role in regulating chemotaxis of gingival fibroblast.
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Affiliation(s)
- Q Luan
- Department of Periodontology, Peking University School of Stomatology, Beijing 100081, China
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Luan Q, Cao C. [Clinical evaluation of gingival sulcus temperature in healthy subjects]. Zhonghua Kou Qiang Yi Xue Za Zhi 1999; 34:154-6. [PMID: 11776927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To evaluate gingival sulcus temperature in healthy subjects. METHODS Small size, high sensitivity and rapid response thermocouple was used to measure the gingival sulcus temperature in seven dental students with healthy periodontium. 28 teeth in each subject were tested. RESULTS For an individual subject, the gingival sulcus temperatures in all sites were always lower than sublingual temperature. There was obviously increased temperature gradient from anterior teeth to posterior teeth. The mean gingival sulcus temperatures on buccal sites were lower than that on lingual sites. There was no significant difference between maxillary and mandibular corresponding sites on lingual side. However, mandibular temperature was significantly lower than maxillary temperature on buccal side. Mandibular buccal temperature was the lowest in all tooth surfaces. CONCLUSION Gingival sulcus temperature in subjects with healthy periodontium is easily influenced by environmental factors.
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Affiliation(s)
- Q Luan
- School of Stomatology, Beijing Medical University, Beijing 100081
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