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Tian L, Li X, Ding Y, Li M, Tang Y, Li D. Corrigendum to "The CLOCK protein regulates insulin secretion related with L-type calcium channels in rat pancreatic beta cells". Biochem Biophys Res Commun 2022; 595:96. [PMID: 35101272 DOI: 10.1016/j.bbrc.2022.01.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Linlin Tian
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China; Tianjin Children's Hospital, Tianjin, 300134, China
| | - Xiaodong Li
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China
| | - Yi Ding
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China; Suzhou Kowloon Hospital, Shanghai Jiaotong University School of Medicine, Suzhou, 215028, China
| | - Minli Li
- The Second People's Hospital of Changsha County, Hunan Province, 410129, China
| | - Yunzhao Tang
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China.
| | - Daiqing Li
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China.
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Tian L, Li X, Ding Y, Li M, Tang Y, Li D. The CLOCK protein regulates insulin secretion related with L-type calcium channels in rat pancreatic beta cells. Biochem Biophys Res Commun 2022; 589:116-122. [PMID: 34906901 DOI: 10.1016/j.bbrc.2021.12.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 12/01/2021] [Accepted: 12/06/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND Circadian locomotor output cycles kaput protein (CLOCK) plays a crucial role in glucose homeostasis and controlling insulin secretion. However, the mechanism of the CLOCK regulating rhythmic insulin secretion has not been fully understood. METHODS Rhythmic expression of the CLOCK in rat pancreatic beta cell was detected. INS-1 cells were transfected with siRNAs to knockdown the CLOCK before the cells were incubated with different concentrations of glucose. Insulin secretion was analyzed by ELISA method. Expression of the L-type calcium channel protein (Cav1.2, Cacna1c) was determined both in the CLOCK-knockdown cells and the control cells. Calcium influx was probed by fluorescent. Chromatin immunoprecipitation (ChIP) test and dual-luciferase reporter gene experiments were applied to verify the relationship between the CLOCK and Cav1.2. RESULTS The CLOCK is abundantly expressed in rat pancreatic beta cells. Transcription level of the CLOCK showed rhythmicity in the beta cells. Compared to the control group, insulin release was significantly impaired with 25 mM glucose incubation in the CLOCK-knockdown group, but not showed with 2.5 mM glucose incubation. The expression of Cav1.2 and the influx of calcium were significantly decreased in the CLOCK-knockdown group with 25 mM glucose incubation. ChIP test indicted that the CLOCK bound to -444∼-454 region of the Cacna1c promoter of the INS-1 cells, but the binding was significantly reduced following the CLOCK-knockdown. Luciferase experiment was in accordance with the finding of ChIP. CONCLUSIONS The CLOCK mediating Cav1.2 expression may point out a potential pathway of circadian rhythm affecting insulin secretion.
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Affiliation(s)
- Linlin Tian
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China; Tianjin Children's Hospital, Tianjin, 300134, China
| | - Xiaodong Li
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China
| | - Yi Ding
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China; Suzhou Kowloon Hospital, Shanghai Jiaotong University School of Medicine, Suzhou, 215028, China
| | - Minli Li
- The Second People's Hospital of Changsha County, Hunan Province, 410129, China
| | - Yunzhao Tang
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China.
| | - Daiqing Li
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China.
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Wang TY, Yang ZZ, Chen JH, Liu Y, Kamar S, Chen QY, Yuan T, Yang XH, Zhang J, Wang C, Yadav SP, Shrestha S, Yang YH, Li DQ. [Clinical study of percutaneous vertebroplasty combined with (125)I seeds implantation in the treatment of patients with thoracic metastatic tumor complicated with posterior vertebral defect]. Zhonghua Zhong Liu Za Zhi 2021; 42:1056-1062. [PMID: 33342165 DOI: 10.3760/cma.j.cn112152-20200228-00145] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the safety and efficacy of percutaneous vertebroplasty combined with interstitial implantation (125)I of seeds (PVPI) in the treatment of thoracic vertebroplasty with posterior vertebra defect. Methods: A retrospective analysis of the clinical data of 64 patients with thoracic spine metastases admitted to Yunnan Cancer Hospital from November 2017 to May 2019 was conducted, including 32 patients with posterior vertebra defect (experimental group) and 32 cases without (control group). Forty-two vertebral bodies of 32 patients in the experimental group were treated with improved PVPI surgery, which performed with the secondary sealing method and inclined puncture needle injection bone cement rotary filling technology, to reduce leakage. The 54 vertebral bodies of 32 patients in control group underwent PVPI. The two groups of patients were followed up on the second day, one month, three months and six months after the operation, and the short-term efficacy, long-term efficacy and safety indicators of the two groups were compared. Results: All 64 patients successfully completed the surgical treatment. The visual analogue scores and Karnofsky scores of the experimental group and the control group were improved to varying degrees on the second day, 1 month, 3 months and 6 months after the operation. There was no statistically significant difference between the two groups (P>0.05). The amount of bone cement in the experimental group and control group was (2.36±0.20) ml and (2.39±0.17) ml, and the difference was not statistically significant (P=0.482). The amount of (125)I seed implantation was (30.63±0.91) and (32.56±0.68), respectively, the difference was not statistically significant (P=0.925). The partial response rates of the study group and the control group were 81.3% and 87.5%, the stable disease rates were 12.5% and 9.4%, the differences were not statistically significant (P>0.05). The median overall survival (mOS) of the study group was 13 months, and the median progression-free survival (mPFS) was 8 months. The mOS of the control group was 14 months, and the mPFS was 8 months. The differences were not statistically significant (P>0.05). In the experimental group, 6 (14.3%) vertebral bodies had cement leakage, of which 2 (4.8%) were cement leakage at posterior vertebra, 4 (9.5%) were paravertebral cement leakage. Seven (13.0%) paravertebral cement leakage occurred in the control group. There was no significant difference in bone cement leakage between the two groups (P=0.097). Bone cement leakage in both groups did not cause serious complications such as spinal cord injury and paraplegia. Conclusion: The application of PVPI in the treatment of thoracic metastatic tumor patients with posterior vertebra defect can acquire better clinical efficacy and safety through conduction of the improved intraoperative technology and paying more attention to the control of bone cement distribution and other issues.
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Affiliation(s)
- T Y Wang
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - Z Z Yang
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - J H Chen
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - Y Liu
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - S Kamar
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - Q Y Chen
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - T Yuan
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - X H Yang
- Department of Bone Tumor, Changzheng Hospital, Navy Medical University, Shanghai 200003, China
| | - J Zhang
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - C Wang
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - S P Yadav
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - S Shrestha
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - Y H Yang
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
| | - D Q Li
- Department of Orthopedics, the Third Affiliated Hospital of Kunming Medical University, Kunming 650118, China
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Zhao HY, Li DQ, Wang J, Hou Y, Sun L, Peng J, Hou M. [Effect and mechanism of low-dose chidamide on the treatment of primary immune thrombocytopenia]. Zhonghua Xue Ye Xue Za Zhi 2020; 41:292-296. [PMID: 32447932 PMCID: PMC7364928 DOI: 10.3760/cma.j.issn.0253-2727.2020.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
目的 探讨低剂量(0.1 mg/kg)西达本胺治疗原发免疫性血小板减少症(ITP)的作用及机制。 方法 ①应用C57BL/6J小鼠建立ITP被动模型,灌胃给予0、0.01、0.1、0.5、5.0 mg/kg西达本胺,观察治疗前后ITP小鼠模型外周血血小板计数。②应用C57BL/6J小鼠建立ITP主动模型,灌胃给予0.1 mg/kg西达本胺,观察治疗前后ITP小鼠模型外周血血小板计数;4周后处死小鼠,流式细胞术检测脾细胞中CD4+CD25+Foxp3+自然调节性T细胞(nTreg)比例并应用ELISA方法检测小鼠外周血IL-6水平。③分离ITP患者外周血单个核细胞,与低剂量西达本胺共培养72 h后检测nTreg细胞比例;免疫磁珠法分离CD4+CD25+调节性T细胞(Treg细胞)以及CD4+CD25−效应T细胞,将二者以1∶4比例混合共培养,加入低剂量西达本胺干预,检测Treg细胞对效应T细胞增殖的抑制作用。 结果 ①低剂量西达本胺可明显提高ITP被动模型鼠外周血血小板水平。②低剂量西达本胺可显著提高ITP动物模型外周血血小板水平,降低出血相关死亡率。③低剂量西达本胺可显著提高ITP动物模型脾细胞中nTreg比例、降低血清IL-6水平。④低剂量西达本胺可显著提高ITP患者外周血单个核细胞培养体系中nTreg细胞比例、增强Treg细胞对效应T细胞增殖的抑制作用。 结论 低剂量西达本胺可促进nTreg生成、增强Treg细胞的免疫抑制功能、降低IL-6水平,促进免疫耐受,对ITP有较好的治疗作用。
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Affiliation(s)
- H Y Zhao
- Department of Hematology, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan 250013
| | - D Q Li
- Department of Hematology, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan 250013
| | - J Wang
- Department of Hematology, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan 250013
| | - Y Hou
- Department of Hematology, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan 250013
| | - L Sun
- Department of Hematology, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan 250013
| | - J Peng
- Department of Hematology, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan 250013
| | - M Hou
- Department of Hematology, Jinan Central Hospital Affiliated to Shandong First Medical University, Jinan 250013
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Li J, Sun L, Wang Y, Guo L, Li D, Liu C, Sun N, Xu Z, Li S, Jiang Y, Wang Y, Zhang S, Chen L. A Mobile-Based Intervention for Glycemic Control in Patients With Type 2 Diabetes: Retrospective, Propensity Score-Matched Cohort Study. JMIR Mhealth Uhealth 2020; 8:e15390. [PMID: 32159518 PMCID: PMC7097724 DOI: 10.2196/15390] [Citation(s) in RCA: 8] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 09/11/2019] [Accepted: 02/09/2020] [Indexed: 01/12/2023] Open
Abstract
Background Mobile-based interventions appear to be promising in ameliorating huge burdens experienced by patients with type 2 diabetes. However, it is unclear how effective mobile-based interventions are in glycemic management of patients with type 2 diabetes based on real-world evidence. Objective This study aimed to evaluate the effectiveness of a mobile-based intervention on glycemic control in patients with type 2 diabetes based on real-world population data. Methods This retrospective, propensity score-matched cohort study analyzed longitudinal data from a clinical electronic health database. The study population included 37,913 patients with type 2 diabetes at cohort entry between October 1, 2016, and July 31, 2018. A total of 2400 patients were matched 1:1, using propensity score matching, into the usual care and mobile health (mHealth) groups. The primary outcomes of glycemic control included control rates of glycated hemoglobin (HbA1c), fasting blood glucose (FBG), and postprandial 2-hour blood glucose (P2BG). Mean values and variation trends of difference with 95% CI were the secondary outcomes. The general linear model was used to calculate repeated-measures analyses of variance to examine the differences between the two groups. Subgroup and sensitivity analyses were performed. Results Of the 2400 patients included in the analysis, 1440 (60.00%) were male and the mean age was 52.24 years (SD 11.56). At baseline, the control rates of HbA1c, FBG, and P2BG in the mHealth and usual care groups were 45.75% versus 47.00% (P=.57), 38.03% versus 32.76% (P=.07), and 47.32% versus 47.89% (P=.83), respectively. At the 3-, 6-, 9-, and 12-month follow-ups, the mHealth group reported higher control rates of HbA1c than did the usual care group: 69.97% versus 46.06% (P<.001), 71.89% versus 61.24% (P=.004), 75.38% versus 53.44% (P<.001), and 72.31% versus 46.70% (P<.001), respectively. At the four follow-up sessions, the control rates of FBG in the mHealth and usual care groups were statistically different: 59.24% versus 34.21% (P<.001), 56.61% versus 35.14% (P<.001), 59.54% versus 34.99% (P<.001), and 59.77% versus 32.83% (P<.001), respectively. At the four follow-up sessions, the control rates of P2BG in the mHealth group were statistically higher than in the usual care group: 79.72% versus 48.75% (P<.001), 80.20% versus 57.45% (P<.001), 81.97% versus 54.07% (P<.001), and 76.19% versus 54.21% (P=.001), respectively. At the four follow-up sessions, the percentages of HbA1c reduction in the mHealth group were 8.66% (95% CI 6.69-10.63), 10.60% (95% CI 8.66-12.54), 10.64% (95% CI 8.70-12.58), and 8.11% (95% CI 6.08-10.14), respectively. At the four follow-up sessions, the percentages of P2BG reduction in the mHealth group were 8.44% (95% CI 7.41-10.73), 17.77% (95% CI 14.98-20.23), 16.23% (95% CI 13.05-19.35), and 16.91% (95% CI 13.17-19.84), respectively. Starting from the sixth month, the mean HbA1c and P2BG values in the two groups increased slightly. Conclusions This mobile-based intervention delivered by a multidisciplinary team can better improve glycemic control rates of patients with type 2 diabetes than usual care. These effects were best sustained within the first 6 months. Starting from the sixth month, intensive management needs to be conducted to maintain long-term effectiveness of the mobile-based intervention.
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Affiliation(s)
- Jing Li
- National Health Commission Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Li Sun
- School of Nursing, Tianjin Medical University, Tianjin, China
| | - Yaogang Wang
- School of Public Health, Tianjin Medical University, Tianjin, China
| | - Lichuan Guo
- National Health Commission Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Daiqing Li
- National Health Commission Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Chang Liu
- Yiducloud Technologies Co, Ltd, Beijing, China
| | - Ning Sun
- Yu-Tang Department, iHealth Labs Inc, Beijing, China
| | - Zheng Xu
- Yu-Tang Department, iHealth Labs Inc, Beijing, China
| | - Shu Li
- School of Public Health, Tianjin Medical University, Tianjin, China
| | - Yunwen Jiang
- School of Public Health, Tianjin Medical University, Tianjin, China
| | - Yuan Wang
- School of Public Health, Tianjin Medical University, Tianjin, China
| | - Shunming Zhang
- School of Public Health, Tianjin Medical University, Tianjin, China
| | - Liming Chen
- National Health Commission Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
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Yu R, Tian L, Ding Y, Gao Y, Li D, Tang Y. Correlation between inflammatory markers and impaired circadian clock gene expression in type 2 diabetes mellitus. Diabetes Res Clin Pract 2019; 156:107831. [PMID: 31476346 DOI: 10.1016/j.diabres.2019.107831] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/11/2019] [Accepted: 08/29/2019] [Indexed: 02/08/2023]
Abstract
AIM Circadian rhythm controls a wide variety of physiological processes in the body. Disruption of the circadian clock in metabolic tissues may increase the risk of diabetes, obesity, and metabolic syndrome. The following study investigated whether the expression of clock genes of peripheral blood cells is impaired in type 2 diabetes (DT2) and whether inflammatory markers are associated with circadian clock gene expression in DT2 patients. MATERIALS AND METHODS Blood samples were obtained from 36 DT2 patients and 14 non-diabetic volunteers. Transcript levels of circadian clock genes were analyzed using real-time quantitative PCR; plasma inflammatory markers were measured by ELISA or clinical laboratory test. RESULTS The CLOCK, BMAL1, PER1, CRY1 and CRY2 mRNA levels were decreased in the diabetic patients. In addition, HbA1c levels were negatively correlated with BMAL1, PER1 and CRY1 mRNA levels. The levels of IL-6, TNF-α and CRP were higher in diabetic subjects compared to control subjects. Impaired expression of circadian clock gene was interrelated with the elevated levels of plasma IL-6 and TNF. Moreover, a multiple linear regression showed that plasma IL-6 level was correlated with impaired expression of circadian clock gene. CONCLUSIONS Circadian clock genes are reduced in peripheral leucocytes of DT2 patients. Furthermore, impaired expression of circadian clock gene are interrelated with the elevated levels of plasma inflammatory markers.
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Affiliation(s)
- Rongguo Yu
- Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin 300384, China
| | - Linlin Tian
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin 300134, China
| | - Yi Ding
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin 300134, China
| | - Yali Gao
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin 300134, China
| | - Daiqing Li
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin 300134, China
| | - Yunzhao Tang
- NHC Key Laboratory of Hormones and Development (Tianjin Medical University), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin 300134, China.
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Li Z, Gao J, Wen L, Zou C, Feng C, Li D, Xu D. Dynamics of Soil Respiration in Alpine Wetland Meadows Exposed to Different Levels of Degradation in the Qinghai-Tibet Plateau, China. Sci Rep 2019; 9:7469. [PMID: 31097739 PMCID: PMC6522552 DOI: 10.1038/s41598-019-43904-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 04/27/2019] [Indexed: 11/21/2022] Open
Abstract
The effects of degradation of alpine wetland meadow on soil respiration (Rs) and the sensitivity of Rs to temperature (Q10) were measured in the Napa Lake region of Shangri-La on the southeastern edge of the Qinghai-Tibet Plateau. Rs was measured for 24 h during each of three different stages of the growing season on four different degraded levels. The results showed: (1) peak Rs occurred at around 5:00 p.m., regardless of the degree of degradation and growing season stage, with the maximum Rs reaching 10.05 μmol·m-2·s-1 in non-degraded meadows rather than other meadows; (2) the daily mean Rs value was 7.14-7.86 μmol·m-2·s-1 during the mid growing season in non-degraded meadows, and declined by 48.4-62.6% when degradation increased to the severely degraded level; (3) Q10 ranged from 7.1-11.3 in non-degraded meadows during the mid growing season, 5.5-8.0 and 6.2-8.2 during the early and late growing seasons, respectively, and show a decline of about 50% from the non-degraded meadows to severely degraded meadows; (4) Rs was correlated significantly with soil temperature at a depth of 0-5 cm (p < 0.05) on the diurnal scale, but not at the seasonal scale; (5) significant correlations were found between Rs and soil organic carbon (SOC), between biomass and SOC, and between Q10 and Rs (p < 0.05), which indicates that biomass and SOC potentially impact Q10. The results suggest that vegetation degradation impact both Rs and Q10 significantly. Also, we speculated that Q10 of alpine wetland meadow is probable greater at the boundary region than inner region of the Qinghai-Tibet Plateau, and shoule be a more sensitive indicator in the studying of climate change in this zone.
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Affiliation(s)
- Zhongfei Li
- College of Ecology and Environment, Southwest Forestry University, Kunming, 650224, Yunnan, China
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, Jiangsu, China
| | - Jixi Gao
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, Jiangsu, China.
| | - Linqin Wen
- College of Ecology and Environment, Southwest Forestry University, Kunming, 650224, Yunnan, China
| | - Changxin Zou
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, Jiangsu, China
| | - Chaoyang Feng
- Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
- State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment, Beijing, 100012, China
| | - Daiqing Li
- Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
- State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment, Beijing, 100012, China
| | - Delin Xu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, Jiangsu, China
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Du YF, Chen N, Li DQ. [Application of robot-assisted surgery in the surgical treatment of head and neck cancer]. Zhonghua Kou Qiang Yi Xue Za Zhi 2019; 54:58-61. [PMID: 30630261 DOI: 10.3760/cma.j.issn.1002-0098.2019.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In recent years, robot-assisted surgery (RAS) has developed rapidly and become one of the hot topics in clinical research. Compared with traditional surgery, RAS has advantages in terms of minimal invasiveness, aesthetics, and functional preservation, and has been gradually applied in clinical practice such as neurosurgery, urology, and head and neck surgery. In the treatment of head and neck tumors, RAS can effectively minimize the surgical injury and accelerate postoperative recovery. This article reviews the application of RAS in the resection of primary lesions of head and neck tumors, neck dissection, and reconstruction of tissue defects.
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Affiliation(s)
- Y F Du
- Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University & Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China
| | - N Chen
- Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University & Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China
| | - D Q Li
- Department of Otorhinolaryngology Head & Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia 19104, PA, U S A
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Li M, Li D, Tang Y, Meng L, Mao C, Sun L, Chang B, Chen L. Effect of Diabetes Sleep Education for T2DM Who Sleep After Midnight: A Pilot Study from China. Metab Syndr Relat Disord 2018; 16:13-19. [PMID: 29356602 DOI: 10.1089/met.2017.0069] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Mingzhen Li
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Daiqing Li
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Yunzhao Tang
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Lingling Meng
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Cuixiu Mao
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Lirong Sun
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Baocheng Chang
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Liming Chen
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
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10
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Tan XG, Yang ZL, Miao XY, Liu ZR, Li DQ, Zou Q, Li JH, Liang LF. [Clinical significance of syndecan-1 and syndecan-2 expression in gallbladder squamous cell/adenosquamous carcinoma and adenocarcinoma]. Zhonghua Zhong Liu Za Zhi 2018; 40:28-34. [PMID: 29365414 DOI: 10.3760/cma.j.issn.0253-3766.2018.01.005] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the expression of syndecan-1 and syndecan-2 and their clinicopathological significance in patients with gallbladder squamous cell (SC)/adenosquamous carcinoma (ASC) and adenocarcinoma (AC). Methods: A total of 126 patients with SC/ASC (n=46) and AC (n=80) were included in this study. The expression levels of syndecan-1 and syndecan-2 were detected by Envison™ immunohistochemistry assay. The clinical and prognostic significance of syndecan-1 and syndecan-2 were analyzed. Results: In the 46 SC/ASC samples, syndecan-1 and syndecan-2 were positively expressed in 29 (63.0%) and 28 (60.9%) tumor tissues, respectively. (Positive expression was defined based on the staining in the component of squamous cell carcinoma. That is to say, the tissue which adenocarcinoma part was positively stained, but squamous cell carcinoma part was negatively stained is also regarded as negative.) In the 80 AC samples, 47 (58.8%) cases showed syndecan-1 positive expression, and 51 (63.8%) showed syndecan-2 positive expression. There was no significant difference in the positive rates of syndecan-1 and syndecan-2 between SC/ASC and AC groups (P>0.05 for all). The levels of syndecan-1 and syndecan-2 were associated with tumor size, TNM staging, lymph node metastasis, invasion of adjacent tissue, and surgical procedures in SC/ASC patients (P<0.05 for all). However, their expression was associated with tumor differentiation, tumor size, TNM staging, lymph node metastasis, invasion of adjacent tissue, and surgical procedures in AC patients (P<0.05 for all). The Kaplan-Meier survival analysis of SC/ASC and AC patients revealed that the average survival time for patients with positive syndecan-1 and syndecan-2 expression was significantly shorter than that of those with negative expression (P<0.01 for all). Cox multivariate analysis indicated that syndecan-1 and syndecan-2 expression were independent unfavorable prognostic factors for SC/ASC and AC patients (P<0.05 for all). Conclusion: The syndecan-1 and syndecan-2 expression are associated with the tumor progression and poor prognosis in patients with gallbladder SC/ASC and AC.
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Affiliation(s)
- X G Tan
- Department of Hepatobiliary Surgery, Yueyang Second People's Hospital, Yueyang 414000, China
| | - Z L Yang
- Research Laboratory of Hepatobiliary Diseases, the Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - X Y Miao
- Research Laboratory of Hepatobiliary Diseases, the Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - Z R Liu
- Research Laboratory of Hepatobiliary Diseases, the Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - D Q Li
- Department of Pathology, the Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - Q Zou
- Department of Pathology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - J H Li
- Department of Pathology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - L F Liang
- Department of Hepatobiliary and Pancreatic Surgery, People's Hospital of Hunan Province, Changsha 410005, China
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11
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Pang B, Kim S, Li D, Ma Z, Sun B, Zhang X, Wu Z, Chen L. Glucagon-like peptide-1 potentiates glucose-stimulated insulin secretion via the transient receptor potential melastatin 2 channel. Exp Ther Med 2017; 14:5219-5227. [PMID: 29201240 DOI: 10.3892/etm.2017.5136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 10/08/2016] [Accepted: 06/22/2017] [Indexed: 12/22/2022] Open
Abstract
The transient receptor potential melastatin 2 (TRPM2) channel, a Ca2+ permeable channel activated by cAMP, is expressed on pancreatic β-cells and is responsible for the regulation of insulin secretion. It is known that glucose-stimulated insulin secretion (GSIS) can be potentiated by glucagon like peptide-1 (GLP-1), and that the changes in the extracellular glucose concentration alter the levels of intracellular adenosine ATP and cAMP. The present study hypothesized that TRPM2 mediates the modulatory effect of GLP-1 on insulin secretion. The results demonstrated that silencing of TRPM2 eliminated GLP-1-enhanced insulin secretion, indicating the involvement of TRPM2 in this process. In addition, the results of current recordings of TRPM2 and measurement of the resulting insulin secretion in β-cells in the presence of GLP-1 and various concentrations of glucose suggest that GLP-1 regulates GSIS via the TRPM2 channel. Furthermore, inhibiting the activity or expression of TRPM2 attenuated GLP-1-induced GSIS. By using specific activators or inhibitors, the present study demonstrated that the two primary downstream effectors of the GLP-1 receptor, exchange protein directly activated by cAMP and protein kinase A, differentially influence GSIS and GLP-1-potentiated GSIS. In conclusion, the present study revealed the role of TRPM2 in GLP-1-regulated insulin secretion. The results of the present study provide a novel avenue for the prevention and treatment of diabetes and its complications.
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Affiliation(s)
- Bo Pang
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Sungjoon Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea.,Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Daiqing Li
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Zejun Ma
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Bei Sun
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Xiaona Zhang
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Zhongming Wu
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China
| | - Liming Chen
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, P.R. China
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12
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Mu L, Zhu N, Zhang J, Xing F, Li D, Wang X. Type 2 diabetes, insulin treatment and prognosis of breast cancer. Diabetes Metab Res Rev 2017; 33. [PMID: 27184049 DOI: 10.1002/dmrr.2823] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 04/21/2016] [Accepted: 05/09/2016] [Indexed: 12/29/2022]
Abstract
BACKGROUND The aim of our study was to investigate whether pre-existing type 2 diabetes and insulin therapy have an impact on the prognosis of breast cancer patients. METHODS We performed a retrospective analysis of 462 type 2 diabetic breast cancer patients and 1644 non-diabetic breast cancer patients treated in our institute from January 2005 to August 2010. Patients were divided by diabetes status and insulin use. The clinicopathological characteristics and clinical outcomes of patients within 5 years following breast cancer diagnosed were analysed. RESULTS Diabetic patients tended to have higher body mass index and higher histological grade tumours. Five-year disease-free survival and overall survival were reduced in diabetic patients (P < 0.001), and diabetes was an independent predictor for an increased risk of breast cancer relapse and death within 5 years (P < 0.001). Insulin treatment was associated with reduced 5-year disease-free survival and overall survival (P < 0.05); the risk of 5-year relapse and breast cancer mortality in the insulin group increased compared to that of non-insulin group after adjusting for age, tumour size, histological grade, oestrogen receptor, progesterone receptor, chemotherapy and hormone therapy (P < 0.05). After adjusting for age and other factors, the risk of breast cancer relapse was also increased in the insulin subgroup, while the risk of breast cancer mortality did not increase statistically. CONCLUSIONS Type 2 diabetes and insulin treatment might be independently associated with poorer prognosis of breast cancer. However, caution is needed when interpreting our results, and further investigations are needed. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Lan Mu
- First Department of Breast Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education, Tianjin, 300060, China
| | - Nannan Zhu
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital, Tianjin Medical University, Tianjin, China
| | - Jiao Zhang
- First Department of Breast Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education, Tianjin, 300060, China
| | - Fang Xing
- First Department of Breast Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education, Tianjin, 300060, China
| | - Daiqing Li
- 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital, Tianjin Medical University, Tianjin, China
| | - Xin Wang
- First Department of Breast Tumor, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education, Tianjin, 300060, China
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13
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Wu SQ, Ma SZ, Zhang C, Li DQ, Gao CZ. Effects of human parathyroid hormone on bone morphogenetic protein signal pathway following spinal fusion in diabetic rats. J BIOL REG HOMEOS AG 2017; 31:111-117. [PMID: 28337879] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Osteoporosis is a major complication in patients with diabetes mellitus. Thus, it is crucial to study the signal mechanisms responsible for enhancement of bone mass in diabetes. Administration of human parathyroid hormone (hPTH) has been reported to prevent osteoblast apoptosis and have anabolic effects on bone in animals and humans. In the present study, we examined the effects of hPTH on expression of bone morphogenetic protein type 2 (BMP-2) and its receptor BMPR2 in diabetic rats following spinal fusion. Our data show that hPTH amplified BMP-2 and BMPR2 in bone tissues of non-diabetic rats, but not in diabetic rats. Our data further demonstrate that hPTH plays a role in regulating BMP-2 and BMPR2 via mTOR-PI3K signal pathway. We suggest specific signaling pathways by which hPTH regulates BMP-2 via mTOR-PI3K mechanism in bone formation following spinal fusion. Notably, our data indicate under diabetic conditions this signal pathway is impaired, thereby likely affecting bone formation after spinal fusion. The subsequent induction of BMP-2 and BMPR2 are likely a part of the protective effects aimed at attenuating pathological bone damage as a result of diabetes.
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Affiliation(s)
- S Q Wu
- Department of Orthopedics, the Second Hospital of Shandong University, Jinan, Shandong, China
| | - S Z Ma
- Department of Orthopedics, the Second Hospital of Shandong University, Jinan, Shandong, China
| | - C Zhang
- Department of Orthopedics, the Second Hospital of Shandong University, Jinan, Shandong, China
| | - D Q Li
- Department of Orthopedics, the Second Hospital of Shandong University, Jinan, Shandong, China
| | - C Z Gao
- Department of Orthopedics, the Second Hospital of Shandong University, Jinan, Shandong, China
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14
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Yan RC, Wang J, Huang ZZ, Wang ZY, Wu XF, Huang JC, Chang LH, Li DQ, Zhang GH. [Mutant Rad50 enhances killing effects of radiation on nasopharyngeal carcinoma cell line CNE1]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 51:746-750. [PMID: 27765104 DOI: 10.3760/cma.j.issn.1673-0860.2016.10.007] [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: 11/05/2022]
Abstract
Objective: To investigate the killing effects of radiation and mutant Rad50 transfection on human nasopharyngeal carcinoma cell line CNE1. Methods: The experimental groups included: control group, Ad-Rad50-GFP group, Ad-EGFP group, irradiation group, Ad-Rad50-GFP combined with irradiation group, and Ad-EGFP combined with irradiation group. CNE1 cells were transfected with recombinant adenoviral vector Ad-Rad50-GFP carrying mutant Rad50 gene. The expressions of Mre11, Rad50, Nbs1, and relevant constituents composing MRN complex were detected by Western Blot. Neutral comet assay was used to detect the effect of mutant Rad50 on restoration process of DNA damage. Cell growth curve was used to evaluate the growth inhibition of CNE1 by mutant Rad50 and radiation. Results: Expressions of Mre11, Rad50, and Nbs1 in cells of Ad-Rad50-GFP group were less significantly than those in control group when irradiation was completed (0.48 vs 0.62, 0.42 vs 0.5, and 0.53 vs 0.69, respectively, P<0.05) and 24 hours after irradiation (0.41 vs 0.69, 0.46 vs 0.58, and 0.34 vs 0.78, respectively, P<0.05). The mean tail moment (MTM) in Ad-Rad50-GFP plus irradiation group was higher than that in irradiation group when irradiation was completed (16.06 vs 14.8, P<0.05), 24 hours after irradiation (58.23 vs 15.89, P<0.05) and 48 hours after irradiation: (45.12 vs 11.42, P<0.05). Seven days after irradiation, the cells in Ad-Rad50-GFP plus irradiation group was less than those in control group or irradiation group (both P<0.05). Conclusion: Mutant Rad50 enhances killing effects of radiation on nasopharyngeal carcinoma cell line CNE1.
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Affiliation(s)
- R C Yan
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - J Wang
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Z Z Huang
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Z Y Wang
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - X F Wu
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - J C Huang
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - L H Chang
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - D Q Li
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - G H Zhang
- Department of Otolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
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Li S, Yang H, Guo Y, Wei F, Yang X, Li D, Li M, Xu W, Li W, Sun L, Gao Y, Wang Y. Comparative efficacy and safety of urate-lowering therapy for the treatment of hyperuricemia: a systematic review and network meta-analysis. Sci Rep 2016; 6:33082. [PMID: 27605442 PMCID: PMC5015109 DOI: 10.1038/srep33082] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 08/19/2016] [Indexed: 12/22/2022] Open
Abstract
The prevalence of hyperuricemia and gout has been increasing, but the comparative effectiveness and safety of different treatments remain uncertain. We aimed to compare the effectiveness and safety of different treatments for hyperuricemia using network meta-analysis methodology. We systematically reviewed fifteen randomized controlled trials (involving 7,246 patients through January 2016) that compared the effects of different urate-lowering drugs (allopurinol, benzbromarone, febuxostat, pegloticase and probenecid) on hyperuricemia. Drug efficacy and safety, as outcomes, were measured by whether the target level of serum urate acid was achieved and whether any adverse events occurred, respectively. We derived pooled effect sizes expressed as odds ratios (ORs) and 95% confidence intervals (CIs). The efficacy and safety of the drugs were ranked by cumulative ranking probabilities. Our findings show that febuxostat, benzbromarone, probenecid, pegloticase, and allopurinol were all highly effective at reducing the risk of hyperuricemia compared to placebo. Febuxostat had the best efficacy and safety compared to the other drugs. Furthermore, febuxostat 120 mg QD was more effective at achieving urate-lowering targets (OR: 0.17, 95% CI: 0.12-0.24) and safer (OR: 0.72, 95% CI: 0.56-0.91) than allopurinol.
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Affiliation(s)
- Shu Li
- Department of Health Service & Care Management, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
- Metabolic Disease Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300070, China
| | - Hongxi Yang
- Department of Health Service & Care Management, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
- Metabolic Disease Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300070, China
| | - Yanan Guo
- Department of Health Service & Care Management, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
| | - Fengjiang Wei
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Xilin Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
| | - Daiqing Li
- Metabolic Disease Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300070, China
| | - Mingzhen Li
- Metabolic Disease Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300070, China
| | - Weili Xu
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
- Aging Research Center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Weidong Li
- Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, 300070, China
| | - Li Sun
- Department of Health Service & Care Management, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
| | - Ying Gao
- Department of Health Service & Care Management, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
| | - Yaogang Wang
- Department of Health Service & Care Management, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
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Zhang Z, Zhang RF, Legut D, Li DQ, Zhang SH, Fu ZH, Guo HB. Pinning effect of reactive elements on adhesion energy and adhesive strength of incoherent Al2O3/NiAl interface. Phys Chem Chem Phys 2016; 18:22864-73. [PMID: 27480916 DOI: 10.1039/c6cp03609k] [Citation(s) in RCA: 12] [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] [Indexed: 11/21/2022]
Abstract
The profound effects of reactive elements (REs) on the adhesion energy and adhesive strength of the α-Al2O3/β-NiAl interface in thermal barrier coating (TBC) systems have attracted increasing attention because RE-doping has played a significant role in improving the thermal cycling lifetime of TBCs. However, the fundamental mechanism is, so far, not well understood due to the experimental difficulty and theoretical complexity in interface modelling. For this purpose, in the present study we have performed comprehensive density functional theory calculations and information targeted experiments to underline the origin of the surprising enhancement of interface adhesion, stability and mechanical strength of the α-Al2O3/β-NiAl interface by different RE doping levels. Our results suggest that the interface failure firstly appears within the NiAl layer adjacent to the Al-terminated oxide under mechanical loading, while the formation of O-RE-Ni bond pairs at the interface can effectively hinder the interface de-cohesion, providing a higher mechanical strength. By comparing several typical REs, it is observed that Hf can emerge not only with the highest interface adhesion energy, but also the highest mechanical strength; in agreement with our experimental results. By continuously increasing the dopant concentration, the strengthening effect may increase correspondingly, but is limited by the solute solubility. These results shed light into the effect of REs on the stability and strength of the α-Al2O3/β-NiAl interface, providing theoretical guidance for interface design via a combinational analysis of bond topology and electronic structure.
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Affiliation(s)
- Z Zhang
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China. and Center for Integrated Computational Engineering, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, P. R. China
| | - R F Zhang
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China. and Center for Integrated Computational Engineering, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, P. R. China
| | - D Legut
- IT4 Innovations Center, VSB-Technical University of Ostrava, CZ-70833 Ostrava, Czech Republic
| | - D Q Li
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China.
| | - S H Zhang
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China. and Center for Integrated Computational Engineering, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, P. R. China
| | - Z H Fu
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China. and Center for Integrated Computational Engineering, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, P. R. China
| | - H B Guo
- School of Materials Science and Engineering, Beihang University, Beijing 100191, P. R. China.
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17
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Wang H, Zhang H, Zhang Z, Huang B, Cheng X, Wang D, Gahu ZL, Xue Z, Da Y, Li D, Yao Z, Gao F, Xu A, Zhang R. Erratum: Corrigendum: Adiponectin-derived active peptide ADP355 exerts anti-inflammatory and anti-fibrotic activities in thioacetamide-induced liver injury. Sci Rep 2016; 6:26729. [PMID: 27244245 PMCID: PMC4886576 DOI: 10.1038/srep26729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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18
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Wang H, Zhang H, Zhang Z, Huang B, Cheng X, Wang D, la Gahu Z, Xue Z, Da Y, Li D, Yao Z, Gao F, Xu A, Zhang R. Adiponectin-derived active peptide ADP355 exerts anti-inflammatory and anti-fibrotic activities in thioacetamide-induced liver injury. Sci Rep 2016; 6:19445. [PMID: 26777428 PMCID: PMC4725969 DOI: 10.1038/srep19445] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 12/14/2015] [Indexed: 12/23/2022] Open
Abstract
Adiponectin is an adipocyte-derived circulating protein with beneficial effects on injured livers. Adiponectin-deficient (adipo(−/−)) mice develop enhanced liver fibrosis, suggesting that adiponectin could be a therapeutic target for liver injury. In the present study, we investigated the protective role of ADP355, an adiponectin-based active short peptide, in thioacetamide (TAA)-induced acute injury and chronic liver fibrosis in mice. ADP355 remarkably reduced TAA-induced necroinflammation and liver fibrosis. ADP355 treatment increased liver glycogen, decreased serum alanine transaminase and alkaline phosphatase activity, and promoted body weight gain, hyper-proliferation and hypo-apoptosis. In addition, ADP355 administration suppressed the TAA-induced activation of hepatic stellate cells and macrophages in the liver. These were associated with the inactivation of TGF-β1/SMAD2 signaling and the promotion of AMPK and STAT3 signaling. Sensitivity of adipo(−/−) mice to chronic liver injury was decreased with ADP355. In conclusion, ADP355 could mimic adiponectin’s action and may be suitable for the preclinical or clinical therapy of chronic liver injury.
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Affiliation(s)
- Huafeng Wang
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.,Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China, Tianjin Medical University, Tianjin, China.,School of Life Science, Shanxi Normal University, Linfen, China
| | - Huan Zhang
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Zimu Zhang
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Biao Huang
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Xixi Cheng
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Dan Wang
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Zha la Gahu
- Department of Cell Biology, Logistic College of CAPF, Tianjin, China
| | - Zhenyi Xue
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.,Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China, Tianjin Medical University, Tianjin, China
| | - Yurong Da
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.,Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China, Tianjin Medical University, Tianjin, China
| | - Daiqing Li
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Zhi Yao
- Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China, Tianjin Medical University, Tianjin, China
| | - Fei Gao
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, PR China
| | - Aimin Xu
- State Key laboratory of Pharmaceutical Biotechnology, and Department of Medicine, University of Hong Kong, Hong Kong, China
| | - Rongxin Zhang
- Laboratory of Immunology and Inflammation, Department of Immunology and Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.,Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China, Tianjin Medical University, Tianjin, China.,Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
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Tang Y, Meng L, Li D, Yang M, Zhu Y, Li C, Jiang Z, Yu P, Li Z, Song H, Ni C. Interaction of sleep quality and sleep duration on glycemic control in patients with type 2 diabetes mellitus. Chin Med J (Engl) 2015. [PMID: 25316226 DOI: 10.3760/cma.j.issn.0366-6999.20141512] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Copious evidence from epidemiological and laboratory studies has revealed that sleep status is associated with glucose intolerance, insulin resistance, thus increasing the risk of developing type 2 diabetes. The aim of this study was to reveal the interaction of sleep quality and sleep quantity on glycemic control in patients with type 2 diabetes mellitus. METHODS From May 2013 to May 2014, a total of 551 type 2 diabetes patients in Tianjin Metabolic Diseases Hospital were enrolled. Blood samples were taken to measure glycosylated hemoglobin (HbA1c), and all the patients completed the Chinese version of the Pittsburgh Sleep Quality Index (PSQI) questionnaire to evaluate their sleep status. "Good sleep quality" was defined as PQSI <5, "average sleep quality" was defined as PQSI 6-8, and "poor sleep quality" was defined as PQSI >8. Poor glycemic control was defined as HbA1c ≥7%. Sleep quantity was categorized as <6, 6-8, and >8 hours/night. Short sleep time was defined as sleep duration <6 hours/night. RESULTS In the poor glycemic control group, the rate of patients who had insufficient sleep was much higher than that in the other group (χ(2) = 11.16, P = 0.037). The rate of poor sleep quality in poor glycemic control group was much greater than that in the average control group (χ(2) = 9.79, P = 0.007). After adjusted by gender, age, body mass index, and disease duration, the adjusted PSQI score's OR was 1.048 (95% CI 1.007-1.092, P = 0.023) for HbA1c level. The sleep duration's OR was 0.464 (95% CI 0.236-0.912, P = 0.026) for HbA1c level. One-way analysis of variance showed that the poor sleep quality group had the highest homeostasis model assessment-insulin resistance (P < 0.01). CONCLUSIONS Inadequate sleep, in both quality and quantity, should be regarded as a plausible risk factor for glycemic control in type 2 diabetes. Poor sleep might bring much more serious insulin resistance and could be the reason for bad glycemic control. A good night's sleep should be seen as a critical health component tool in the prevention and treatment of type 2 diabetes. It is important for clinicians to target the root causes of short sleep duration and/or poor sleep quality.
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Affiliation(s)
- Yunzhao Tang
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Lingling Meng
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Daiqing Li
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Min Yang
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Yanjuan Zhu
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Chenguang Li
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Zhenhuan Jiang
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Ping Yu
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Zhu Li
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Hongna Song
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Changlin Ni
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China. or
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Wu YJ, Guo X, Li CJ, Li DQ, Zhang J, Yang Y, Kong Y, Guo H, Liu DM, Chen LM. Dipeptidyl peptidase-4 inhibitor, vildagliptin, inhibits pancreatic beta cell apoptosis in association with its effects suppressing endoplasmic reticulum stress in db/db mice. Metabolism 2015; 64:226-35. [PMID: 25195070 DOI: 10.1016/j.metabol.2014.08.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 07/17/2014] [Accepted: 08/12/2014] [Indexed: 12/11/2022]
Abstract
AIMS Vildagliptin promotes beta cell survival by inhibiting cell apoptosis. It has been suggested that chronic ER (endoplasmic reticulum) stress triggers beta cell apoptosis. The objective of the study is to explore whether the pro-survival effect of vildagliptin is associated with attenuation of endoplasmic reticulum stress in islets of db/db mice. METHODS Vildagliptin was orally administered to db/db mice for 6 weeks, followed by evaluation of beta cell apoptosis by caspase3 activity and TUNEL staining method. Endoplasmic reticulum stress markers were determined with quantitative RT-PCR, immunohistochemistry and immunoblot analysis. RESULTS After 6 weeks of treatment, vildagliptin treatment increased plasma active GLP-1 levels (22.63±1.19 vs. 11.69±0.44, P<0.001), inhibited beta cell apoptosis as demonstrated by lower amounts of TUNEL staining nuclei (0.37±0.03 vs. 0.55±0.03, P<0.01) as well as decreased caspase3 activity (1.48±0.11 vs. 2.67±0.13, P<0.01) in islets of diabetic mice compared with untreated diabetic group. Further, vildagliptin treatment down-regulated several genes related to endoplasmic reticulum stress including TRIB3 (tribbles homolog 3) (15.9±0.4 vs. 33.3±1.7, ×10⁻³, P<0.001), ATF-4(activating transcription factor 4) (0.83±0.06 vs. 1.42±0.02, P<0.001) and CHOP(C/EBP homologous protein) (0.07±0.01 vs. 0.16±0.01, P<0.001). CONCLUSIONS Vildagliptin promoted beta cell survival in db/db mice in association with down-regulating markers of endoplasmic reticulum stress including TRIB3, ATF-4 as well as CHOP.
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Affiliation(s)
- Yan-ju Wu
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Xin Guo
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Chun-jun Li
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Dai-qing Li
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Jie Zhang
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Yiping Yang
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Yan Kong
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Hang Guo
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - De-min Liu
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Li-ming Chen
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China.
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22
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Xu N, Wu H, Li D, Wang J. Diagnostic accuracy of glycated hemoglobin compared with oral glucose tolerance test for diagnosing diabetes mellitus in Chinese adults: a meta-analysis. Diabetes Res Clin Pract 2014; 106:11-8. [PMID: 24857263 DOI: 10.1016/j.diabres.2014.04.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 04/09/2014] [Accepted: 04/18/2014] [Indexed: 10/25/2022]
Abstract
AIMS A meta-analysis was conducted to evaluate the diagnostic value of glycated hemoglobin (HbA1c) ≥6.5% (48mmol/mol) for diabetes in Chinese adults. METHODS Oral glucose tolerance test (OGTT) was selected as the reference standard. PubMed, EMBASE, CNKI, Wanfang Data, and VIP were searched to obtain all diagnostic tests with HbA1c ≥6.5% (48mmol/mol) for diabetes in Chinese adults published between January 2003 and October 2013. The qualities of the included studies were assessed by using the Quality Assessment of Diagnostic Accuracy Studies 2 tool. Meta-DiSc software was used to conduct a comprehensive quantitative assessment, and summary receiver operating characteristic (sROC) curves were obtained. RESULTS A total of 9 studies with 25,932 subjects were included. Pooled sensitivity was 0.518, pooled specificity 0.956, pooled positive likelihood ratio 19.007 and pooled negative likelihood ratio was 0.477. Pooled diagnostic odds ratio was 40.631. AUCsROC was 0.929. CONCLUSION Compared with OGTT, using HbA1c ≥6.5% (48mmol/mol) to diagnose diabetes in Chinese adults exhibited high specificity and low sensitivity and would have failed to diagnose 48.7% of newly diagnosed diabetes. The diagnostic HbA1c value could be reduced to improve sensitivity. Long-term prospective studies are required to establish an appropriate HbA1c value as a diagnostic criterion for diabetes in China.
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Affiliation(s)
- Na Xu
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Information Center, Tianjin Centers for Disease Control and Prevention, Tianjin, China
| | - Hongfang Wu
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Daiqing Li
- Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Jianhua Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin 300070, China.
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Li D, Zhang C, Pizzol L, Critto A, Zhang H, Lv S, Marcomini A. Regional risk assessment approaches to land planning for industrial polluted areas in China: the Hulunbeier region case study. Environ Int 2014; 65:16-32. [PMID: 24413251 DOI: 10.1016/j.envint.2013.12.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 05/24/2013] [Revised: 12/02/2013] [Accepted: 12/03/2013] [Indexed: 06/03/2023]
Abstract
The rapid industrial development and urbanization processes that occurred in China over the past 30years has increased dramatically the consumption of natural resources and raw materials, thus exacerbating the human pressure on environmental ecosystems. In result, large scale environmental pollution of soil, natural waters and urban air were recorded. The development of effective industrial planning to support regional sustainable economy development has become an issue of serious concern for local authorities which need to select safe sites for new industrial settlements (i.e. industrial plants) according to assessment approaches considering cumulative impacts, synergistic pollution effects and risks of accidental releases. In order to support decision makers in the development of efficient and effective regional land-use plans encompassing the identification of suitable areas for new industrial settlements and areas in need of intervention measures, this study provides a spatial regional risk assessment methodology which integrates relative risk assessment (RRA) and socio-economic assessment (SEA) and makes use of spatial analysis (GIS) methodologies and multicriteria decision analysis (MCDA) techniques. The proposed methodology was applied to the Chinese region of Hulunbeier which is located in eastern Inner Mongolia Autonomous Region, adjacent to the Republic of Mongolia. The application results demonstrated the effectiveness of the proposed methodology in the identification of the most hazardous and risky industrial settlements, the most vulnerable regional receptors and the regional districts which resulted to be the most relevant for intervention measures since they are characterized by high regional risk and excellent socio-economic development conditions.
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Affiliation(s)
- Daiqing Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Chen Zhang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Lisa Pizzol
- University Ca' Foscari Venice, Department of Environmental Sciences, Informatics and Statistics, Calle Larga S. Marta 2137, 30123 Venice, Italy
| | - Andrea Critto
- University Ca' Foscari Venice, Department of Environmental Sciences, Informatics and Statistics, Calle Larga S. Marta 2137, 30123 Venice, Italy
| | - Haibo Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Shihai Lv
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Antonio Marcomini
- University Ca' Foscari Venice, Department of Environmental Sciences, Informatics and Statistics, Calle Larga S. Marta 2137, 30123 Venice, Italy.
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Yuan Y, Yang ZL, Zou Q, Li JH, Li DQ, Liang LF, Zeng GX, Chen SL. Comparative study of clinicopathological significance, BIRC7, and STC2 expression between squamous cell/adenosquamous carcinomas and adenocarcinoma of gallbladder. Neoplasma 2013; 60:698-705. [PMID: 23906305 DOI: 10.4149/neo_2013_089] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Gallbladder cancers (GBCs) are uncommon, but highly aggressive cancers. The majority of GBCs are adenocarcinomas (ACs), but rare subtypes of GBCs such as squamous cell carcinoma (SC) and adenosquamous carcinoma (ASC) are observed as well. The clinicopathological characteristics of SC/ASC have not been well documented. Expressions of BIRC7 and STC2 were observed in some tumors. However, BIRC7 and STC2 expressions and clinical significances in gallbladder cancer have not been reported.In this study, the protein expressions of BIRC7 and STC2 in 46 SCs/ASCs and 80 ACs were measured using immunohistochemistry. We demonstrated that positive BIRC7 and STC2 expressions were significantly associated with large tumor mass (>3cm), high TNM stage and lymph node metastasis in SC/ASC and AC (p<0.05). Positive expression of BIRC7 was significantly associated with invasion of around tissues and organs in both SC/ASC and AC. Additionally, negative BIRC7 and STC2 expressions were significantly associated with surgical curability in AC. Univariate Kaplan-Meier analysis showed that BIRC7 and STC2 expressions, differentiation, tumor size, TNM stages, invasion, lymph node metastasis, and surgical curability were significantly associated with post-operative survival in both SC/ASC and AC patients(p < 0.001). Multivariate Cox regression analysis showed that positive BIRC7 and STC2 expressions are independent poor-prognostic factors in both SC/ASC and AC patients. Our study suggested that positive BIRC7 and STC2 expressions are closely correlated with clinical, pathological, and biological behaviors as well as poor-prognosis of gallbladder cancer.
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MESH Headings
- Adaptor Proteins, Signal Transducing/metabolism
- Adenocarcinoma/metabolism
- Adenocarcinoma/mortality
- Adenocarcinoma/secondary
- Adult
- Aged
- Aged, 80 and over
- Biomarkers, Tumor/metabolism
- Carcinoma, Adenosquamous/metabolism
- Carcinoma, Adenosquamous/mortality
- Carcinoma, Adenosquamous/secondary
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/mortality
- Carcinoma, Squamous Cell/secondary
- Female
- Follow-Up Studies
- Gallbladder Neoplasms/metabolism
- Gallbladder Neoplasms/mortality
- Gallbladder Neoplasms/pathology
- Glycoproteins/metabolism
- Humans
- Immunoenzyme Techniques
- Inhibitor of Apoptosis Proteins/metabolism
- Intercellular Signaling Peptides and Proteins/metabolism
- Lymphatic Metastasis
- Male
- Middle Aged
- Neoplasm Proteins/metabolism
- Neoplasm Recurrence, Local/metabolism
- Neoplasm Recurrence, Local/mortality
- Neoplasm Recurrence, Local/secondary
- Neoplasm Staging
- Prognosis
- Survival Rate
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Buda P, Reinbothe T, Nagaraj V, Mahdi T, Luan C, Tang Y, Axelsson AS, Li D, Rosengren AH, Renström E, Zhang E. Eukaryotic translation initiation factor 3 subunit e controls intracellular calcium homeostasis by regulation of cav1.2 surface expression. PLoS One 2013; 8:e64462. [PMID: 23737983 PMCID: PMC3667822 DOI: 10.1371/journal.pone.0064462] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2012] [Accepted: 04/15/2013] [Indexed: 01/09/2023] Open
Abstract
Inappropriate surface expression of voltage-gated Ca2+channels (CaV) in pancreatic ß-cells may contribute to the development of type 2 diabetes. First, failure to increase intracellular Ca2+ concentrations at the sites of exocytosis impedes insulin release. Furthermore, excessive Ca2+ influx may trigger cytotoxic effects. The regulation of surface expression of CaV channels in the pancreatic β-cells remains unknown. Here, we used real-time 3D confocal and TIRFM imaging, immunocytochemistry, cellular fractionation, immunoprecipitation and electrophysiology to study trafficking of L-type CaV1.2 channels upon β-cell stimulation. We found decreased surface expression of CaV1.2 and a corresponding reduction in L-type whole-cell Ca2+ currents in insulin-secreting INS-1 832/13 cells upon protracted (15–30 min) stimulation. This internalization occurs by clathrin-dependent endocytosis and could be prevented by microtubule or dynamin inhibitors. eIF3e (Eukaryotic translation initiation factor 3 subunit E) is part of the protein translation initiation complex, but its effect on translation are modest and effects in ion channel trafficking have been suggested. The factor interacted with CaV1.2 and regulated CaV1.2 traffic bidirectionally. eIF3e silencing impaired CaV1.2 internalization, which resulted in an increased intracellular Ca2+ load upon stimulation. These findings provide a mechanism for regulation of L-type CaV channel surface expression with consequences for β-cell calcium homeostasis, which will affect pancreatic β-cell function and insulin production.
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Affiliation(s)
- Pawel Buda
- Lund University Diabetes Center, Malmö, Sweden
| | | | | | - Taman Mahdi
- Lund University Diabetes Center, Malmö, Sweden
| | - Cheng Luan
- Lund University Diabetes Center, Malmö, Sweden
| | - Yunzhao Tang
- Lund University Diabetes Center, Malmö, Sweden
- Key Lab of Hormones and Development, Ministry of Health, and Metabolic Diseases Hospital, Tianjin Medical University, Tianjin, China
| | | | - Daiqing Li
- Key Lab of Hormones and Development, Ministry of Health, and Metabolic Diseases Hospital, Tianjin Medical University, Tianjin, China
| | | | - Erik Renström
- Lund University Diabetes Center, Malmö, Sweden
- * E-mail: (ER); (EZ)
| | - Enming Zhang
- Lund University Diabetes Center, Malmö, Sweden
- * E-mail: (ER); (EZ)
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Chen YY, Zhu TH, Liu RM, He BJ, Zhao X, Wang YZ, Li DQ, Xu Y. [The mechanism of inhibition of the increase in intracellular calcium concentration by the islet amyloid polypeptide in high glucose-stimulated INS-1 cells]. Zhonghua Nei Ke Za Zhi 2013; 52:407-411. [PMID: 23945308] [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: 06/02/2023]
Abstract
OBJECTIVE To explore the potential mechanism of the inhibition of increased intracellular free calcium concentration ([Ca²⁺]i) by short-term exposure to the islet amyloid polypeptide (IAPP) in high glucose-stimulated pancreatic β cells. METHODS The pancreatic β cells were loaded with calcium sensitive fluorescent indicator Fluo-4/AM. The fluorescence intensity, which represented [Ca²⁺]i, was measured in time by laser scanning confocal microscope before and after stimulated by glucose, KCl, caffeine and carbachol. RESULT The fluorescence intensity F/F₀ in INS-1 cells, increased to about 2 folds after glucose stimulation. After the exposure to the IAPP with different concentration, the fluorescence intensity F/F₀ was decreased slightly in the pretreated cells by 16.7 mmol/L glucose with 0.5 µmol/L IAPP. However, after the pretreatment of IAPP with the concentration of 1.0, 5.0, 10.0 µmol/L, the fluorescence intensity F/F₀ showed a dose-dependent decrease with statistical difference. The fluorescence intensity F/F₀ in the cells increased rapidly in a peak pattern after the stimulation of 30 mmol/L KCl. But with the pretreatment of 10.0 µmol/L IAPP, the fluorescence intensity F/F₀ decreased with statistical difference. With 20 mmol/L caffeine and 100 µmol/L carbachol which stimulated Ca²⁺ release respectively from internal ryanodine receptor (RYR) and inositol triphosphate (IP₃) Ca²⁺ storage, the fluorescence intensity F/F₀ curve presented a peak pattern. After 10 µmol/L IAPP pretreatment, the fluorescence intensity F/F₀ showed no statistical difference from the control group. CONCLUSIONS The short-term effect of IAPP on pancreatic β cells has no influence on the caffeine and carbachol stimulated Ca²⁺ release from endoplasmic reticulum RYR and IP₃ Ca²⁺ storage. The inhibition of calcium increase in INS-1 cells by short-term exposure to IAPP may mainly via inhibiting the voltage-gated L-calcium channels with intact release capacity of Ca²⁺ storage.
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Affiliation(s)
- Yan-yan Chen
- Department of Endocrinology, the Tianjin Medical University General Hospital, Tianjin 300052, China
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Ding Q, Li DQ, Wang PH, Chu YJ, Meng SY, Sun Q. [Risk factors for infections of methicillin-resistant Staphylococci in diabetic foot patients]. Zhonghua Yi Xue Za Zhi 2012; 92:228-231. [PMID: 22490791] [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: 05/31/2023]
Abstract
OBJECTIVE To examine the distribution patterns of pathogens isolated from the patients with diabetic foot ulcers and explore the risk factors for infections of methicillin-resistant S. aureus (MRSA) or methicillin-resistant S. epidermidis (MRSE). METHODS A total of 388 diabetic-foot patients hospitalized at Tianjin Metabolic Diseases Hospital between January 2008 and June 2010 were recruited. The distribution profiles of pathogens isolated from diabetic foot ulcers were summarized. The patients with S. aureus infections were divided into MRSA and MSSA groups while those with S. epidermidis infections into MRSE and MSSE groups. The clinical features of these patients were compared between all groups. Logistic regression was employed to identify the risk factors for the MRSA/MRSE infections. RESULTS A total of 362 pathogens were isolated from them. And the Gram-positive bacteria were the most predominant (57.2%, 207/362), followed by Gram-negative bacilli (39.2%, 142/362) and true fungi (3.6%, 13/362). The three most frequently isolated pathogens were S. aureus (27.1%), S. epidermidis (18.8%) and Pseudomonas aeruginosa (15.5%). Statistically significant differences existed in antibiotic usage in 6 months prior to hospitalization, course of ulcer, ulcer size, deep ulcer, osteomyelitis, hypertension, anemia, hypoproteinemia and erythrocyte sedimentation rate between the patients infected with MRSA and MSSA (P < 0.05). The MRSE infection was correlated with recurrent ulcer, osteomyelitis, hypoproteinemia, HbA1c and lower total serum protein (P < 0.05). Multiple Logistic regression analysis revealed that antibiotic usage in 6 months prior to hospitalization, long course of ulcer, osteomyelitis, hypertension and hypoproteinemia were risk factors for the MRSA infection. And HbA1c was a risk factor for the MRSE infection. CONCLUSION In the present study, the Gram-positive cocci are the main pathogens isolated from diabetic foot ulcers. And S. aureus and S. epidermidis are the most frequently isolated pathogens. Antibiotic usage in 6 months prior to hospitalization, long course of ulcer, osteomyelitis, hypertension and hypoproteinemia are risk factors for the MRSA infection. And HbA1c is a risk factor for the MRSE infection.
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Affiliation(s)
- Qun Ding
- Key Lab of Hormones & Development, Ministry of Health, Metabolic Diseases Hospital, Tianjin Medical University, China
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Chen L, Li DQ, Zhong J, Wu XL, Chen Q, Peng H, Liu SQ. IL-17RA aptamer-mediated repression of IL-6 inhibits synovium inflammation in a murine model of osteoarthritis. Osteoarthritis Cartilage 2011; 19:711-8. [PMID: 21310253 DOI: 10.1016/j.joca.2011.01.018] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Revised: 01/28/2011] [Accepted: 01/31/2011] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Generate DNA aptamers to inhibit IL-17RA-mediated synovial inflammation in an experimental mouse model of osteoarthritis (OA). METHODS A novel cell-SELEX method was applied to obtain DNA aptamers specific for IL-17RA. A single-stranded (ss) DNA library with four(30) probes was synthesised. By incubating this library with NIH3T3 cells, we collected DNA ligands that could bind the cell surface. The collected ligands were incubated with IL-17RA-deficient NIH3T3 cells, and unbound ssDNA was harvested from the supernatant for the next round of selection. After 12 cycles, specific aptamers against IL-17RA were generated. For animal experiments, a meniscectomy was performed on Balb/C mice to generate an animal model of OA. Mice received weekly intra-articular (i.a.) injections of aptamers or control treatments for 6 weeks. Synovial membranes were evaluated by histomorphology and the mRNAs of critical inflammatory cytokines were measured by quantitative reverse transcriptase-polymerase chain reaction (RT-PCR). RESULTS An aptamer termed RA10-6 was obtained that could efficiently block IL-17 binding to IL-17RA in a dose-dependent manner in vitro. Histological examination and quantitative RT-PCR results showed that OA mice that injected with RA10-6, especially in combination with celecoxib demonstrated inhibition of synovial thickening and reduction in IL-6 levels in the synovial tissue. CONCLUSION Our results suggest that RA10-6 can inhibit synovial inflammation by blocking IL-17/IL-17RA-mediated IL-6 expression. RA10-6 acted synergistically with celecoxib to inhibit IL-6 expression in synovial tissues. Thus, aptamers targeting IL-17RA might serve as potent adjunctive agents for the early treatment of OA.
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Affiliation(s)
- L Chen
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China.
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Chu Y, Yu D, Wang P, Xu J, Li D, Ding M. Nanotechnology promotes the full-thickness diabetic wound healing effect of recombinant human epidermal growth factor in diabetic rats. Wound Repair Regen 2010; 18:499-505. [DOI: 10.1111/j.1524-475x.2010.00612.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Li DQ. Wuling Capsule promotes hippocampal neurogenesis by improving expression of connexin 43 in rats exposed to chronic unpredictable mild stress. ACTA ACUST UNITED AC 2010; 8:662-9. [DOI: 10.3736/jcim20100710] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
Heat stress produces oxidative stress and affects the alternation of plasma K(+) and Na(+). Since Na(+),K(+)-ATPase is sensitive to oxidative stress and critical for maintaining the homeostasis of these two ions, we examined the genetic polymorphism of the ATP1A1 gene in 160 Holstein cows using polymerase chain reaction low ionic strength single-strand conformation polymorphism and DNA sequencing methods. G to A at position -14103 in exon 14 and C to T at position -14242 in intron 14 of the bovine ATP1A1 gene were identified, but the former single nucleotide polymorphism was silent with respect to the amino acid sequence of the protein. However, we found significant correlations between ATP1A1 gene polymorphism and the coefficient of heat tolerance (P<0.01) and with respiratory rate (P<0.01). Genotype AC was the most favorable genotype for heat tolerance. This polymorphism site has potential as a genetic marker for heat tolerance traits in dairy cattle breeding.
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Affiliation(s)
- Y X Liu
- Institute of Cattle Science, Nanjing Agricultural University, Nanjing, China
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Tang YZ, Li DQ, Sun FJ, Li L, Yu DM. P-glycoprotein regulating biphasic insulin secretion in rat pancreatic beta cells. Chin Med J (Engl) 2009; 122:2587-2592. [PMID: 19951574] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
BACKGROUND A 65-kD mdr1 (multi-drug resistance protein 1, P-glycoprotein)-like protein has been suggested to be the regulatory protein to the chloride channel protein 3 (ClC-3) mediating insulin granules acidification and release in mouse pancreatic beta cells. But the protein has not been deeply investigated. In this study, we identified existence of the 65-kda protein in rat islets and preliminarily explored its biological functions. METHODS Total RNAs of rat kidneys served as positive controls, and pancreas, islets and INS-1 cells were extracted for reverse-transcript PCR (RT-PCR), respectively. The cDNAs were run with specific primers selected from the mRNA of abcb1b encoding P-glycoprotein. All PCR products were visualized in agarose gel electrophoresis and sequenced. Homogenates of rat islets and INS-1 cells were applied to SDS-PAGE. P-glycoprotein was detected by a specific monoclonal antibody, C219. Biphasic insulin release was measured in static incubations of rat islets with radioimmunology assay. RESULTS Compared with positive control, expression of the P-glycoprotein mRNA segments were detected in the islets, INS-1 cells and pancreas. Sequence analysis confirmed that the PCR products were matched with mRNA of P-glycoprotein. A 65-kda protein was recognized by the antibody in the islets homogenate but not in that of INS-1 cells in Western-blotting. Instead, the homogenate of INS-1 cells contained a 160-kda protein recognized by the antibody. Insulin secretion of rat islets were stimulated by high glucose (16.7 mmol/L), and showed biphasic curve during 60-minute incubation. After co-incubation with cyclosporine A (CsA), specific inhibitor to P-glycoprotein, the second phase of insulin secretion was reduced significantly while the first phase was not influenced. CONCLUSIONS The 65-kda protein expressed in rat islets is most likely a mini-P-glycoprotein. It may play a key role regulating biphasic insulin release.
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Affiliation(s)
- Yun-zhao Tang
- Key Lab of Hormone and Development (Tianjin and Ministry of Health of the People's Republic of China), Institution of Endocrinology, Tianjin Metabolic Diseases Hospital, Tianjin Medical University, Tianjin 300070, China
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Wu N, Gao JX, Ennaanay D, Mendoza GF, Luo ZL, Li DQ, Tian MR. [Ecosystem service valuation of Ertan Reservoir watershed in mitigating reservoir sand sedimentation]. Ying Yong Sheng Tai Xue Bao 2009; 20:2225-2232. [PMID: 20030147] [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: 05/28/2023]
Abstract
By using software ArcGIS 9.2, an evaluation model was established to simulate the ecosystem service of Ertan Reservoir watershed in mitigating the sand sedimentation in the reservoir. In the meantime, sediment delivery ratio and universal soil loss equation were used to simulate the spatial patterns of the annual sediment yield and sediment retention in the watershed as well as the value during the service life period. In 2000, the total quantity of soil retention in the watershed was 12. 1 x 10(8) t x a(-1). The region with higher soil retention was near the main and branch streams of Yalong River, and that with higher sediment delivery ratio was near the streams and the Ertan Reservoir. The region with higher sediment yield and sediment retention was around the reservoir. The actual sediment yield in the study area was 629.3 x 10(4) t x a(-1), occupying 12.7% of the actual soil erosion volume. Farmland was the most important source of sediment yield, with its sediment yield occupying 62.9% of the total. The contribution of forestland to the mitigation of reservoir sand sedimentation was higher than that of the other lands on a per unit area basis. For the reservoir's designed operating life (100 a), the total value of the watershed in the service of mitigating Ertan Reservoir sand sedimentation was 2.75 billion yuan.
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Affiliation(s)
- Nan Wu
- Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.
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Xie Y, Wang SX, Sha WW, Zhou X, Wang WL, Han LP, Li DQ, Yu DM. Effects and mechanism of glucagon-like peptide-1 on injury of rats cardiomyocytes induced by hypoxia-reoxygenation. Chin Med J (Engl) 2008; 121:2134-2138. [PMID: 19080172] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND Although the insulinotropic role of glucagon-like peptide-1 (GLP-1) in type 2 diabetes mellitus has been substantiated, its role in cardioprotection remains largely unknown. This study aimed to determine the effects of GLP-1 on injury of rats cardiac myocytes induced by hypoxia-reoxygenation (H/R) and the possible mechanisms. METHODS The cultured neonatal rats cardiac myocytes were randomly divided into seven groups: the normal control group, the H/R group, the GLP-1 + H/R group, the GLP-1 + H/R + UO126 (the p42/44 mitogen-activated protein kinase (MAPK) inhibitor) group, the GLP-1 + H/R + LY294002 (phosphatidylinositol 3-kinase (PI3K) inhibitor) group, the H/R + UO126 group, and the H/R + LY294002 group. The lactate dehydrogenase (LDH) activity, apoptosis rate of cardiac myocytes, and caspase-3 activity were detected after the injury of H/R. RESULTS Compared with the normal control group, the activity of LDH, cardiac myocyte apoptosis rate, and caspase-3 activity all increased significantly in the H/R group (P < 0.01). Compared with the H/R group, these three indices all decreased in the H/R + GLP-1 group (P < 0.01). However, the changes of LDH activity, apoptosis rate, and caspase-3 activity were inhibited by LY294002 and UO126 respectively. CONCLUSIONS GLP-1 can directly act on cardiac myocytes and protect them from H/R injury mainly by inhibiting their apoptosis. Its mechanism may be through the PI3K-Akt pathway and the MAPK signaling pathway.
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Affiliation(s)
- Yun Xie
- Department of Diabetic Neurology, Metabolic Disease Hospital, Tianjin Medical University, Tianjin 300070, China
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Zhang HH, Li FB, Wu ZF, Li DQ, Xu DR, Yuan HX. Baseline concentrations and spatial distribution of trace metals in surface soils of Guangdong province, China. J Environ Qual 2008; 37:1752-1760. [PMID: 18689736 DOI: 10.2134/jeq2007.0531] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A total of 260 surface soil samples were collected to investigate the spatial distribution of trace metals in Guangdong province, one of the fast developing regions in China. The results show that the upper baseline concentrations of Cu, Pb, Zn, Cd, Ni, Cr, and Hg were 28.7, 57.6, 77.8, 0.13, 23.5, 87.0, and 0.15 mg kg(-1), respectively. Regional parent materials and pedogenesis are the primary factors influencing the concentrations of trace metals, and various anthropogenic activities are the second most important factors. The spatial distribution of trace metals is correlated to the geological characters with high concentrations of trace metals always located in regional fault areas, basins, and the Pearl River Delta alluvial plain and to the low concentrations associated with the other areas in Guangdong province.
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Affiliation(s)
- H H Zhang
- Guangdong Public Lab. of Environmental Science & Technology, Guangdong Inst. of Eco-Environmental and Soil Sciences, Guangzhou 510650, P. R. China
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Zhang HH, Yuan HX, Hu YG, Wu ZF, Zhu LA, Zhu L, Li FB, Li DQ. Spatial distribution and vertical variation of arsenic in Guangdong soil profiles, China. Environ Pollut 2006; 144:492-9. [PMID: 16563579 DOI: 10.1016/j.envpol.2006.01.029] [Citation(s) in RCA: 24] [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] [Subscribe] [Scholar Register] [Received: 10/25/2005] [Revised: 01/13/2006] [Accepted: 01/17/2006] [Indexed: 05/08/2023]
Abstract
Total of 260 soil profiles were reported to investigate the arsenic spatial distribution and vertical variation in Guangdong province. The arsenic concentration followed an approximately lognormal distribution. The arsenic geometric mean concentration of 10.4 mg/kg is higher than that of China. An upper baseline concentration of 23.4 mg/kg was estimated for surface soils. The influence of soil properties on arsenic concentration was not important. Arsenic spatial distributions presented similar patterns that high arsenic concentration mainly located in limestone, and sandshale areas, indicating that soil arsenic distribution was dependent on bedrock properties than anthropogenic inputs. Moreover, from A- to C-horizon arsenic geometric mean concentrations had an increasing tendency of 10.4, 10.7 to 11.3 mg/kg. This vertical variation may be related to the lower soil organic matter and soil degradation and erosion. Consequently, the soil arsenic export into surface and groundwaters would reach 1040 t year-1 in the study area.
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Affiliation(s)
- H H Zhang
- Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, 510650, China.
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Deng L, Huang H, Xu MX, Zhou SQ, Wang XW, Lu M, Ren F, Li DQ. [Structural modification and bioactivity of cyclovirobuxine D]. Yao Xue Xue Bao 2004; 39:434-8. [PMID: 15491100] [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: 05/01/2023]
Abstract
AIM To search for new compounds for the treatment of cardiovascular diseases by structural modification of cyclovirobuxine D. METHODS According to rational drug design principle, a series of cyclovirobuxine D analogues were prepared, and their bioactivities were tested. RESULTS Ten new compounds were syntheized and confirmed by spectra. CONCLUSION Endurance lacking oxygen activity and antiarrhythmia effects of some analogues of cyclovirobuxine D were tested. Some compounds showed better activity than cyclovirobuxine D.
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Affiliation(s)
- Lan Deng
- West China School of Pharmacy, Sichuan University, China.
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Li DQ, Wu HW. [Histomorphometric analysis in ovariectomized rat with osteoporosis]. Hunan Yi Ke Da Xue Xue Bao 2001; 26:428-30. [PMID: 12536489] [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: 02/28/2023]
Abstract
OBJECTIVE To establish the pattern of bone loss of Sprague-Dawley rats after ovariectomy, to investigate and assess the pattern of bone remodeling in ovariectomized rats and the therapeutic action of nilestriol and levenorgestrel. METHODS Histomorphometric analysis for bone tissues was performed with the instrument of computerized image analysis. RESULTS The trabecular bone volume, mean trabecular thickness, and trabecular bone perimeter were all significantly decreased (P < 0.01) in ovariectomized rats in the 14th week postsurgery compared to the sham operated group. But the osteoblastic index, osteoclastic index, resorptive surface of trabecular, and trabecular surface covered by osteoblast were significantly increased (P < 0.01). There was no significant difference between the treatment group and the sham operated group. CONCLUSIONS The pattern of bone loss of rats after ovariectomy has been established successfully. The study provides evidence that the cause of bone loss in the ovariectomized rats is attributable to the increase of bone turnover and negative imbalance in bone remodeling process. The treatment of nilestriol and levenorgestrel may decrease the bone turnover and correct the imbalance to cure the osteoporosis.
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Affiliation(s)
- D Q Li
- Department of Pathology, Second Xiangya Hospital, Central South University, Changsha 410011, China
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Abstract
The matrix metalloproteinases, MMP-2 and MMP-9, are known to be critical extracellular-remodeling enzymes in wound healing and other diseases of the ocular surface. This study investigated the regulation of MMP-2 and MMP-9 in human corneal epithelial cells by growth factors and pro-inflammatory cytokines (IL-1beta and TNF-alpha) they are exposed to, and by doxycycline, a medication used to treat ocular surface disease. Primary human corneal epithelial cell cultures were treated with one of the following cytokines (IL-1alpha, IL-1beta, IL-6, IL-8, TNF-alpha) or growth factors (EGF, HGF, KGF, PDGF-BB, TGF-alpha, TGF-beta), with or without their corresponding inhibitors. The conditioned media were collected after 24 hr for gelatin zymography and MMP-9 activity assay. Total RNA was extracted from the cells treated for 6 hr and was subjected to RT-PCR and Northern hybridization. Between the two gelatinases, MMP-2 and MMP-9, detected by zymography, the 92 kDa MMP-9 in the conditioned medium was markedly up-regulated by the pro-inflammatory cytokines, IL-1beta and TNF-alpha. The MMP-9 protein and activity were dose-dependently stimulated by IL-1beta or TNF-alpha at 0.1, 1.0 and 10 ng ml(-1). This up-regulation was nearly abolished by neutralizing antibodies (IL-1beta and TNF-alpha) and by IL-1 receptor antagonist. Semi-quantitative RT-PCR and Northern hybridization disclosed that the MMP-9 transcript was also markedly up-regulated in a dose-dependent manner by IL-1beta and TNF-alpha. Doxycycline (10 microg ml(-1)) suppressed MMP-9 protein level and activity, but not its mRNA, that was stimulated by IL-1beta and TNF-alpha (1 ng ml(-1)). In contrast, the 72 kDa MMP-2 was not significantly modulated by any of these cytokines. In conclusion, production of MMP-9 is stimulated by the pro-inflammatory cytokines, IL-1beta and TNF-alpha. These factors may play a role in the pathogenesis of MMP-9 mediated corneal matrix degradation. The efficacy of doxycycline in treating ocular surface diseases may be related to its ability to suppress MMP-9 production in the corneal epithelium.
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Affiliation(s)
- D Q Li
- Ocular Surface Center, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA
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Abstract
To hypothesise that Staphylococcus epidermidis may possess clusterin receptor(s), bacterial binding of human clusterin was determined. In a fluid phase, the binding was markedly influenced by culture medium and three out of 12 S. epidermidis strains grown on ISO-sensitest agar expressed clusterin-binding ability. S. epidermidis J9P, selected for further study, showed saturable binding of iodine-labelled clusterin, and the binding was only inhibited by unlabelled clusterin. The binding was sensitive to protease treatment. Scatchard plot indicated one single class of binding sites (K(d)=104.2 nM). None of the S. epidermidis strains bound immobilised clusterin. These data imply that ligand-receptor interaction exists between S. epidermidis and clusterin in fluid phase, but the domain(s) recognised by bacteria may have been occluded when clusterin was adsorbed on a surface.
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Affiliation(s)
- D Q Li
- Department of Medical Microbiology, Dermatology and Infection, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
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Li DQ, Lundberg F, Ljungh A. Binding of vitronectin and clusterin by coagulase-negative staphylococci interfering with complement function. J Mater Sci Mater Med 2001; 12:979-982. [PMID: 15348351 DOI: 10.1023/a:1012865200458] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Coagulase-negative staphylococci (CoNS) are commonly associated with infections of prosthetic devices mediated by adsorbed host factors on biomaterial surfaces. Complement activation is known to occur and induce unspecific inflammation around the biomaterials. Human vitronectin (Vn) and clusterin (Clu), two potent inhibitors of complement, can be bound by CoNS. With a hypothesis whether binding of Vn or Clu influences complement activation, two measurements were determined. For Vn, complement activation was measured with a mouse anti-activated human C9 antibody. In the presence of Vn-binding strain, Staphylococcus hemolyticus SM13I, complement activation on a surface pre-coated with Vn occurred as it did in the absence of Vn pre-coating. For S. epidermidis 3380, which does not express binding of Vn, complement activation on a Vn-presented surface was significantly decreased. For Clu, erythrocytes lysis was measured to reflect the end product of complement activation (membrane attack complex). The complement-induced hemolysis increased when human serum was pre-incubated with Clu-binding strains, S. epidermidis J9P. The enhancement of hemolysis by J9P decreased when serum was supplemented by exogenous Clu. The data imply that interaction between CoNS and Vn or Clu interferes with one of their physiological functions, complement inhibition.
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Affiliation(s)
- D Q Li
- Department of Medical Microbiology, Dermatology and Infection, Lund University Sölvegatan 23, S-223 62 Lund, Sweden
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Li DQ, Lundberg F. Characterization of vitronectin-binding proteins of Staphylococcus epidermidis. Curr Microbiol 2001; 42:361-7. [PMID: 11400058 DOI: 10.1007/s002840010230] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2000] [Accepted: 11/06/2000] [Indexed: 10/18/2022]
Abstract
Staphylococcus epidermidis is the most common microorganism that is isolated from the cerebrospinal fluid (CSF) shunt infection patients. Vitronectin adsorbed on the surface of implants may mediate bacterial adhesion and colonization. To characterize vitronectin-binding properties, we analyzed S. epidermidis BD5703 isolated from a CSF shunt infection. Expression of vitronectin-binding protein(s) depended on culture media. Two proteins (60 and 52 kDa) were purified from vitronectin affinity chromatography. Two other vitronectin-binding proteins (21 and 16 kDa) were purified from an ion-exchange column. All purified proteins blocked bacterial binding of immobilized vitronectin significantly except the 16-kDa protein. The N-terminal sequences of the 21- and 16-kDa proteins did not show any appreciable amino acid sequence homology. The 52-kDa protein was sequenced by mass spectrometry and identified as an autolysin. This report demonstrates that interaction of vitronectin with multiple recognition sites on BD5703 surface may contribute to bacterial colonization.
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Affiliation(s)
- D Q Li
- Department of Infectious Diseases and Medical Microbiology, Lund University Hospital, Sölvegatan 23, S-223 62 Lund, Sweden
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Abstract
The effect of potassium thiocyanate on the partitioning of lysozyme and BSA in polyethylene glycol 2000/ammonium sulfate aqueous two-phase system has been investigated. As a result of the addition of potassium thiocyanate to the PEG/ammonium sulfate system, the PEG/mixed salts aqueous two-phase system was formed. It was found that the potassium thiocyanate could alter the pH difference between the two phases, and, thus, influence the partition coefficients of the differently charged proteins. The relationship between partition coefficient of the proteins and pH difference between two phases has been discussed. It was proposed that the pH difference between two phases could be employed as the measurement of electrostatic driving force for the partitioning of charged proteins in polyethylene 2000/ammonium sulfate aqueous two-phase system.
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Affiliation(s)
- Y Xu
- Department of Chemical Engineering, Hebei Institute of Technology, PR China
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Li DQ, Lee SB, Gunja-Smith Z, Liu Y, Solomon A, Meller D, Tseng SC. Overexpression of collagenase (MMP-1) and stromelysin (MMP-3) by pterygium head fibroblasts. Arch Ophthalmol 2001; 119:71-80. [PMID: 11146729] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
BACKGROUND The balance between matrix metalloproteinases (MMPs) and the tissue inhibitors of metalloproteinases (TIMPs) determines the extent of connective tissue degradation and remodeling. OBJECTIVE To determine whether pterygium, characterized by fibrovascular invasion into the cornea, may in part be mediated by an increased activity of MMPs. MATERIALS AND METHODS Expression of transcripts and proteins of MMPs, TIMPs, and urokinase plasminogen activator (uPA) by cultured human pterygium head, body, and subconjunctival fibroblasts, and normal corneal and conjunctival fibroblasts were determined by Northern hybridization, enzyme-linked immunosorbent assay, Western blotting, zymography, and quantitative collagenase assay, respectively. RESULTS Compared with normal conjunctival fibroblasts from 6 subjects, the expression of MMP-1 and MMP-3 transcripts was dramatically increased in pterygium head fibroblasts of 8 patients, but not in pterygium body fibroblasts of 6 patients. The protein levels and collagenolytic and caseinolytic activities of MMP-1 and/or MMP-3 were also markedly increased in pterygium head fibroblasts. The MMP-1 and MMP-3 proteins and activity decreased in order from pterygium head to body to subconjunctival fibroblasts. There was no difference in the transcript and protein expression of MMP-2, TIMP-1, TIMP-2, and uPA among these groups. CONCLUSION Pterygium head fibroblasts express increased mRNA, protein, and activities of MMP-1 and MMP-3. CLINICAL RELEVANCE Overexpression of MMP-1 and MMP-3, a phenotype previously linked with UV exposure in dermal fibroblasts to explain the pathologic finding of elastotic degeneration, suggests that pterygium head fibroblasts might be intrinsically altered by UV, which might be responsible for corneal invasion.
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Affiliation(s)
- D Q Li
- Department of Ophthalmology, Bascom Palmer Eye Institute, Miami, FL, USA
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Meller D, Li DQ, Tseng SC. Regulation of collagenase, stromelysin, and gelatinase B in human conjunctival and conjunctivochalasis fibroblasts by interleukin-1beta and tumor necrosis factor-alpha. Invest Ophthalmol Vis Sci 2000; 41:2922-9. [PMID: 10967046] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
PURPOSE Overexpression and increased activities of matrix metalloproteinases (MMPs) have recently been reported in cultured conjunctival fibroblasts from patients with conjunctivochalasis. The role of inflammatory cytokines in modulating expression of MMPs, their tissue inhibitors (TIMPs), and urokinase plasminogen activator (uPA) as potential contributors to the pathogenesis of conjunctivochalasis was investigated. METHODS Interleukin-1beta (IL-1beta) or tumor necrosis factor-alpha (TNF-alpha) was added at 10 ng/ml to a serum-free medium. Expression of transcripts and proteins of MMPs, TIMPs, and uPA by cultured normal human conjunctival and conjunctivochalasis fibroblasts was determined by Northern hybridization, enzyme-linked immunosorbent assay (ELISA) and Western blot analysis, respectively. Gelatin and casein zymographies were performed in serum-free conditioned media with and without the respective enzyme inhibitors. RESULTS Without challenging the cells, conjunctivochalasis fibroblasts showed mRNA and protein overexpression of MMP-1 and MMP-3 compared with normal conjunctival fibroblasts, which showed minor or no expression of these enzymes. IL-1beta markedly and TNF-alpha to lesser extent increased mRNA and protein expression of MMP-1 and MMP-3 in conjunctivochalasis fibroblasts from 2 subjects when compared with normal conjunctival fibroblasts from 2 subjects and with their nonstimulated counterparts. In conjunctivochalasis fibroblasts and normal conjunctival fibroblasts, TNF-alpha, but not IL-1beta, induced a gelatinolytic activity of MMP-9, which was further confirmed by Western blot analysis and ELISA. Expression of MMP-2, TIMP-1, and TIMP-2 mRNA and protein was not influenced by IL-1beta or TNF-alpha, and no difference was found in the gelatinolytic activity of MMP-2 between both cell types. CONCLUSIONS Inflammatory cytokines such as IL-1beta and TNF-alpha, which can potentially be derived from the ocular surface and tears, may be responsible for increased expression of MMPs in cultured conjunctivochalasis fibroblasts. Ocular inflammation might be one important denominator in the pathogenesis of conjunctivochalasis.
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Affiliation(s)
- D Meller
- Ocular Surface and Tear Center, Department of Ophthalmology, Bascom Palmer Eye Institute, Miami, FL 33136, USA
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Solomon A, Rosenblatt M, Li DQ, Liu Z, Monroy D, Ji Z, Lokeshwar BL, Pflugfelder SC. Doxycycline inhibition of interleukin-1 in the corneal epithelium. Invest Ophthalmol Vis Sci 2000; 41:2544-57. [PMID: 10937565] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
PURPOSE To evaluate the effect of doxycycline on the regulation of interleukin (IL)-1 expression and activity in human cultured corneal epithelium. METHODS Human corneal limbal epithelium (HLE) was cultured from explants prepared from limbal rings of donor corneas. Primary cultured limbal epithelial cells were treated with either 10 microg/ml lipopolysaccharide (LPS), LPS with 10 microg/ml doxycycline, or LPS with 0.1 mg/ml methylprednisolone (MP) for 24 hours. The intracellular and supernatant protein amounts of IL-1alpha, the precursor and mature forms of IL-1beta, IL-1 receptor antagonist (IL-1 RA), and the intracellular level of IL-1beta-converting enzyme (ICE) were measured with enzyme-linked immunosorbent assays (ELISAs). Western blot analysis was performed to evaluate IL-1 RA protein. mRNA steady state amounts were determined by RNase protection assay (RPA) for IL-1alpha, IL-1beta, IL-1 RA, and ICE. RESULTS LPS increased the mRNA and protein amounts of intracellular and released IL-1alpha, mature IL-1beta, and IL-1 RA. Doxycycline inhibited the LPS-induced IL-1beta increase in the mRNA and protein amounts in the corneal epithelium and upregulated the expression of the anti-inflammatory IL-1 RA protein. In addition, doxycycline reduced the steady state level of the cellular ICE protein but did not affect the level of ICE transcripts. IL-1beta secreted to the conditioned media of HLE was functionally active in inducing matrix metalloproteinase (MMP)-1 and MMP-3 in cultured corneal fibroblasts. Doxycycline significantly decreased IL-1beta bioactivity in the supernatants from LPS-treated corneal epithelial cultures. These effects were comparable to those induced by the corticosteroid, MP. CONCLUSIONS Doxycycline can suppress the steady state amounts of mRNA and protein of IL-beta and decrease the bioactivity of this major inflammatory cytokine. These data may partially explain the clinically observed anti-inflammatory properties of doxycycline. The observation that doxycycline was equally potent as a corticosteroid, combined with the relative absence of adverse effects, makes it a potent drug for a wide spectrum of ocular surface inflammatory diseases.
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Affiliation(s)
- A Solomon
- Ocular Surface and Tear Center, Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami School of Medicine, Florida 33136, USA
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Solomon A, Li DQ, Lee SB, Tseng SC. Regulation of collagenase, stromelysin, and urokinase-type plasminogen activator in primary pterygium body fibroblasts by inflammatory cytokines. Invest Ophthalmol Vis Sci 2000; 41:2154-63. [PMID: 10892857] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
PURPOSE To examine the expression patterns of extracellular matrix degrading enzymes in cultured primary pterygium body fibroblasts activated by cytokines and growth factors potentially derived from ocular surface epithelial cells and tears. METHODS EGF, TGF-alpha, PDGF-BB, IL-1beta, bFGF, TGF-beta1, TNF-alpha, or IL-6 were added at 10 ng/ml to early passaged primary pterygium body fibroblasts (PBF) or normal human conjunctival fibroblasts (HJF) in a serum-free medium. Expression of transcripts and proteins of MMP-1, MMP-2, MMP-3, MMP-9, TIMP-1, TIMP-2, and uPA was determined by Northern hybridization, ELISA, and Western blotting, respectively. Gelatin and casein zymographies were performed in their serum-free conditioned media with or without enzyme inhibitors to determine the activity of MMP-2 and -3, respectively. RESULTS IL-1beta and TNF-alpha dramatically increased the mRNA and protein expression of MMP-1 and MMP-3 in cultured PBF when compared to normal HJF and to their nonstimulated counterparts cultured in a serum-free medium. EGF and TGF-alpha also upregulated MMP-3 in PBF when compared to HJF. The transcript levels of MMP-2 were high but stable for the two cell types regardless of the cytokine treatment. Both TIMP-1 and TIMP-2 expressions were not influenced by the cell type or the cytokine treatment. MMP-9 was not expressed in either of these two types of fibroblasts. Both IL-1beta and TNF-alpha induced a significant decrease in uPA expression in PBF, whereas bFGF induced a slight increase in both HJF and PBF. CONCLUSIONS Chronic inflammatory stimulation by IL-1beta and TNF-alpha, which potentially can be derived from the ocular surface and tears, may be responsible for increased expression of MMPs in cultured PBF. These data have clinical implications on progression of pterygium and recurrence associated with incomplete excision of primary PBF under the influence of ocular surface inflammation. Suppression of intraoperative and postoperative inflammation may be a new strategy to prevent pterygium recurrence.
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Affiliation(s)
- A Solomon
- Ocular Surface and Tear Center, Department of Ophthalmology, Bascom Palmer Eye Institute, Miami, Florida 33136, USA
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Pflugfelder SC, Liu Z, Monroy D, Li DQ, Carvajal ME, Price-Schiavi SA, Idris N, Solomon A, Perez A, Carraway KL. Detection of sialomucin complex (MUC4) in human ocular surface epithelium and tear fluid. Invest Ophthalmol Vis Sci 2000; 41:1316-26. [PMID: 10798646] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
PURPOSE To evaluate human ocular surface epithelium and tear fluid for the presence of sialomucin complex (MUC4), a high-molecular-weight heterodimeric glycoprotein composed of mucin (ASGP-1) and transmembrane (ASGP-2) subunits. METHODS Reverse transcription-polymerase chain reaction (RT-PCR) and Northern blot analysis assays were used to identify sialomucin complex RNA in ocular surface epithelia. Immunoprecipitation and immunoblot analysis were used to identify immunoreactive species in human tears and in the corneal and conjunctival epithelia using antibodies specific for carbohydrate and peptide epitopes on the sialomucin complex subunits. Immunofluorescence staining was used to detect sialomucin complex in frozen sections and impression cytology specimens of human cornea and conjunctival epithelia. RESULTS ASGP-1- and ASGP-2-specific sequences were amplified from RNA extracted from both conjunctival and corneal epithelial biopsies by RT-PCR. Sialomucin complex transcripts were also detected in these tissues by Northern blot analysis, with a greater level of RNA detected in the peripheral than the central corneal epithelium. Sialomucin complex was immunoprecipitated from tear fluid samples and both corneal and conjunctival epithelia and detected by immunoblot analysis with specific anti-ASGP-1 and anti-ASGP-2 antibodies. The ASGP-1 peptide antibody HA-1 stained the full thickness of the corneal and conjunctival epithelia. In contrast, antibody 15H10, which reacts against a carbohydrate epitope on ASGP-1, stained only the superficial epithelial layers of these tissues. No staining was observed in the conjunctival goblet cells. CONCLUSIONS Sialomucin complex was originally identified in rat mammary adenocarcinoma cells and has recently been shown to be produced by the ocular surface epithelia of rats. Furthermore, it has been identified as the rat homologue of human MUC4 mucin. The present studies show that it is expressed in the stratified epithelium covering the surface of the human eye and is present in human tear fluid. Expression of a carbohydrate-dependent epitope on the mucin subunit (ASGP-1) of sialomucin complex occurs in a differentiation-dependent fashion. Sialomucin complex joins MUC1 as another membrane mucin produced by the human ocular surface epithelia but is also found in the tear fluid, presumably in a soluble form, as found on the rat ocular surface.
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Affiliation(s)
- S C Pflugfelder
- Ocular Surface and Tear Center, Bascom Palmer Eye Institute, University of Miami School of Medicine, Florida 33136, USA.
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Lee SB, Li DQ, Tan DT, Meller DC, Tseng SC. Suppression of TGF-beta signaling in both normal conjunctival fibroblasts and pterygial body fibroblasts by amniotic membrane. Curr Eye Res 2000; 20:325-34. [PMID: 10806447] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
PURPOSE When used as an alternative substrate following bare sclera removal of pterygium and other ocular surface diseases, amniotic membrane transplantation can reduce scarring on the reconstructed conjunctival surface. This study was carried out to determine if the amniotic membrane (AM) suppresses the expression of the TGFb signaling system in cultured normal conjunctival (HCF) and pterygial body fibroblasts (PBF). METHODS HCF and PBF were cultured on AM and plastic wells in serum-containing and serum-free DMEM with or without TGF-beta1. Total RNA was extracted and subjected to Northern hybridization with probes of TGF-beta1, b2 and b3; TGF-beta receptors (TGF- beta R) type I, II and III; a-smooth muscle actin (alpha-SM), b1-integrin, CD44, fibroblast growth factor receptor 1 (FGF-R1/ flg) and platelet-derived growth factor receptor b (PDGFR-beta); and GAPDH as a loading control. MTT assay was used for cell proliferation. RESULTS Amniotic membrane markedly suppressed the transcript expression of TGF-beta2, b3 and all three types of TGF-beta receptors by both fibroblasts as compared to their cultures on plastic surface. In addition, expression of CD44 transcript was also markedly suppressed while that of b1 integrin, a-SM actin, and FGFR1/flg was mildly suppressed. In contrast, expression of TGF-beta1 and PDGFR-beta remained largely unchanged. The cell proliferation of HCF and PBF grown on AM was also significantly suppressed. CONCLUSIONS Amniotic membrane matrix uniquely suppresses TGF- beta signaling in both types of fibroblasts. It may also suppress signaling via CD44, b1 integrin and FGFR1/flg. As a result, the phenotype may become less mitogenic, contractile and fibrogenic. These data support in part why amniotic membrane transplantation has an anti-scarring effect for conjunctival surface reconstruction.
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Affiliation(s)
- S B Lee
- Bascom Palmer Eye Institute, Department of Ophthalmology, Ocular Surface and Tear Center, University of Miami School of Medicine, Miami, Florida, USA
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Sakurai T, Kim JG, Suzuki N, Matsuo T, Li DQ, Yao Y, Masunaga S, Nakanishi J. Polychlorinated dibenzo-p-dioxins and dibenzofurans in sediment, soil, fish, shellfish and crab samples from Tokyo Bay area, Japan. Chemosphere 2000; 40:627-640. [PMID: 10705539 DOI: 10.1016/s0045-6535(99)00324-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Concentrations of tetra- to octa-chlorinated dibenzo-p-dioxins and dibenzofurans in samples collected in or near Tokyo Bay, Japan, with a densely inhabited catchment area, were congener-specifically determined and discussed. Analyzed in this study were samples of surface sediment covering the whole bay area, reference soil representing atmospheric impact, and fish, shellfish and crab commonly consumed as food. The range of concentrations were comparable to or higher than those in other parts of Japan. The origins of these compounds in the catchment area of the bay were investigated in terms of homolog and isomeric compositions in the sediment samples. Biota-sediment accumulation factors for benthic species declined as the degree of chlorination increased.
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Affiliation(s)
- T Sakurai
- Department of Urban Engineering, University of Tokyo, Japan.
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