1
|
Chen YW, Cheng PP, Yin YF, Cai H, Chen JZ, Feng MH, Guo W, Zhao P, Zhang C, Shan XL, Chen HH, Guo S, Lu Y, Xu M. Integrin αV mediated activation of myofibroblast via mechanoparacrine of transforming growth factor β1 in promoting fibrous scar formation after myocardial infarction. Biochem Biophys Res Commun 2024; 692:149360. [PMID: 38081108 DOI: 10.1016/j.bbrc.2023.149360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/17/2023] [Accepted: 12/04/2023] [Indexed: 01/06/2024]
Abstract
BACKGROUND Myocardial infarction (MI) dramatically changes the mechanical stress, which is intensified by the fibrotic remodeling. Integrins, especially the αV subunit, mediate mechanical signal and mechanoparacrine of transforming growth factor β1 (TGF-β1) in various organ fibrosis by activating CFs into myofibroblasts (MFBs). We investigated a possible role of integrin αV mediated mechanoparacrine of TGF-β1 in MFBs activation for fibrous reparation in mice with MI. METHODS Heart samples from MI, sham, or MI plus cilengitide (14 mg/kg, specific integrin αV inhibitor) treated mice, underwent functional and morphological assessments by echocardiography, and histochemistry on 7, 14 and 28 days post-surgery. The mechanical and ultrastructural changes of the fibrous scar were further evaluated by atomic mechanics microscope (AFM), immunofluorescence, second harmonic generation (SHG) imaging, polarized light and scanning electron microscope, respectively. Hydroxyproline assay was used for total collagen content, and western blot for protein expression profile examination. Fibroblast bioactivities, including cell shape, number, Smad2/3 signal and expression of extracellular matrix (ECM) related proteins, were further evaluated by microscopic observation and immunofluorescence in polyacrylamide (PA) hydrogel with adjustable stiffness, which was re-explored in fibroblast cultured on stiff matrix after silencing of integrin αV. The content of total and free TGF-β1 was tested by enzyme-linked immunosorbent assay (ELISA) in both infarcted tissue and cell samples. RESULT Increased stiffness with heterogeneity synchronized with integrin αV and alpha smooth muscle actin (α-SMA) positive MFBs accumulation in those less mature fibrous areas. Cilengitide abruptly reduced collagen content and disrupted collagen alignment, which also decreased TGF-β1 bioavailability, Smad2/3 phosphorylation, and α-SMA expression in the fibrous area. Accordingly, fibroblast on stiff but not soft matrix exhibited obvious MFB phenotype, as evidenced by enlarged cell, hyperproliferation, well-developed α-SMA fibers, and elevated ECM related proteins, while silencing of integrin αV almost abolished this switch via attenuating paracrine of TGF-β1 and nuclear translocation of Smad2/3. CONCLUSION This study illustrated that increased tissue stiffness activates CFs into MFBs by integrin αV mediated mechanoparacrine of TGF-β1, especially in immature scar area, which ultimately promotes fibrous scar maturation.
Collapse
Affiliation(s)
- Yu-Wen Chen
- School of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Pei-Pei Cheng
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuan-Feng Yin
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, China
| | - Hong Cai
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, China
| | - Jing-Zhi Chen
- School of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ming-Hui Feng
- Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wei Guo
- School of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Pei Zhao
- School of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chen Zhang
- School of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiao-Li Shan
- School of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hui-Hua Chen
- School of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shuo Guo
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, China
| | - Yi Lu
- Minhang Hospital, Fu Dan University, Shanghai, China.
| | - Ming Xu
- School of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| |
Collapse
|
2
|
Li R, Li WL, Yuan GS, Pang HJ, Li Q, Hu XY, Guo YB, Chen JZ, Zang MY. [Study on the comparison of postoperative liver injury caused by hepatic arterial perfusion chemotherapy combined with targeted immunotherapy with hepatic arterial chemoembolization combined with targeted immunotherapy for intermediate-and advanced-stage liver cancer]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:1163-1168. [PMID: 38238949 DOI: 10.3760/cma.j.cn501113-20230827-00070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Objective: To compare the postoperative liver function injury condition in patients with intermediate-and advanced-stage hepatocellular carcinoma (HCC) treated with hepatic artery infusion chemotherapy (HAIC) and hepatic artery chemoembolization (TACE) combined with immune checkpoint inhibitors (ICIs) and multi-target tyrosine kinase inhibitors (TKIs). Methods: Patients with intermediate-and advanced-stage HCC who were admitted and treated with HAIC/TACE+ICIs+TKIs therapy at Nanfang Hospital of Southern Medical University from January 2019 to November 2021, with follow-up up to July 2023, were retrospectively enrolled. The results of liver function tests within one week before interventional surgery and on the first day after surgery were recorded. The degree of postoperative liver injury was graded according to the common terminology criteria for adverse events 5.0 (CTCAE 5.0). The treatment efficacy was evaluated according to RECIST 1.1 criteria. Measurement data were compared between groups using a t-test or a non-parametric rank sum test. Enumeration data were compared between the groups using the χ(2) test or Fisher's exact probability method. The survival condition differences were analyzed by the log-rank method. Results: This study included 82 and 77 cases in the HAIC and TACE groups. There were no statistically significant differences between the two groups of patients in terms of gender, age, physical condition score, number of tumors, presence or absence of liver cirrhosis, Child-Pugh grade, albumin-bilirubin (ALBI) grade, and combined ICIs and TKIs . The HAIC group had later tumor staging, a greater tumor burden, poorer liver reserve function, and a larger proportion of patients in stage C (81.7% vs. 63.6%), χ(2)=6.573, P = 0.01). There were 53 cases (64.6% vs. 32.5%) with a maximum tumor diameter of ≥ 10cm, χ(2)=16.441, P < 0.001), and more patients had a retention rate of ≥ 10% for indocyanine green (ICG) at 15 minutes (68.3% vs. 51.9%, P = 0.035). The postoperative incidence rate of increased levels of alanine aminotransferase, aspartate aminotransferase, and total bilirubin was significantly lower in the HAIC group than that in the TACE group (28.0% vs. 63.6%, χ(2)=20.298, P < 0.001, 54.9% vs. 85.7%, χ(2)=17.917, P < 0.001;40.2% vs. 55.8%, χ(2)=3.873, P = 0.049). The number of patients with postoperative ALBI grade 3 was significantly lower in the HAIC group than that in the TACE group (6.1% vs. 16.9%, χ(2)=4.601, P = 0.032). There was no statistically significant difference in the incidence rate of postoperative hypoalbuminemia, activated partial thromboplastin time, or increased international standardized ratio between the two groups of patients. There was no statistically significant difference in median progression-free survival (7.3 months vs. 8.2 months, P = 0.296) or median overall survival (16.5 months vs. 21.9 months, P = 0.678) between the two groups of patients. Conclusion: The incidence rate of postoperative liver injury is higher in patients with intermediate-and advanced-stage HCC treated with TACE combined with ICIs and TKIs than in patients with HAIC combined with ICIs and TKIs.
Collapse
Affiliation(s)
- R Li
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - W L Li
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - G S Yuan
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - H J Pang
- Division of Vascular and Interventional Radiology, Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Q Li
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - X Y Hu
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Y B Guo
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Z Chen
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - M Y Zang
- Hepatology Unit and Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| |
Collapse
|
3
|
Dong SY, Deng SY, Fan R, Chen JZ, Cheng X, Hao X, Dai WC. [Predictive value of aMAP risk score for early recurrence of small hepatocellular carcinoma after microwave ablation]. Zhonghua Nei Ke Za Zhi 2023; 62:1329-1334. [PMID: 37935500 DOI: 10.3760/cma.j.cn112138-20221108-00835] [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: 11/09/2023]
Abstract
Objective: To explore the value of the aMAP risk score (age, male, albumin-bilirubin, and platelets) to predict early recurrence within one year after microwave ablation in patients with small hepatocellular carcinoma. Methods: This was a retrospective study that enrolled 142 patients diagnosed with hepatocellular carcinoma who were treated with microwave ablation in the Department of Hepatology Unit of Nanfang Hospital, Southern Medical University from July 2016 to July 2021. The cohort enrolled 121 male and 21 female patients, including 110 patients that were <60 years old. All the patients were followed-up after microwave ablation to evaluate residual tumor and recurrence of tumor by computed tomography or magnetic resonance imaging. The observation indices mainly included general data and imaging data of patients. Using the X-tile tools, patients were divided into two groups: a high aMAP score group and a low aMAP score group. Multivariate Cox regression analysis was conducted for comparison of independent risk factors. Results: Multivariate Cox regression showed that high aMAP score, maximum tumor diameter >20 mm, and high AFP were the independent risk factors of early recurrence (all P<0.05). Kaplan-Meier survival curves showed that the median recurrence-free survival was 25.5 months in the low aMAP score group and 6.1 months in the high aMAP score group (P=0.001). Conclusions: The aMAP score could predict the early recurrence within 1 year of small hepatocellular carcinoma after microwave ablation. Patients with high aMAP score should undergo rigorous postoperative follow-up evaluations..
Collapse
Affiliation(s)
- S Y Dong
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Southern Medical University, State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Guangdong Provincial Institute of Liver Diseases, Guangzhou 510515, China First Clinical Medical College, Southern Medical University, Guangzhou, Guangzhou, 510515, China
| | - S Y Deng
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Southern Medical University, State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Guangdong Provincial Institute of Liver Diseases, Guangzhou 510515, China
| | - R Fan
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Southern Medical University, State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Guangdong Provincial Institute of Liver Diseases, Guangzhou 510515, China
| | - J Z Chen
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Southern Medical University, State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Guangdong Provincial Institute of Liver Diseases, Guangzhou 510515, China
| | - X Cheng
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Southern Medical University, State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Guangdong Provincial Institute of Liver Diseases, Guangzhou 510515, China
| | - X Hao
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Southern Medical University, State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Guangdong Provincial Institute of Liver Diseases, Guangzhou 510515, China
| | - W C Dai
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Southern Medical University, State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Guangdong Provincial Institute of Liver Diseases, Guangzhou 510515, China
| |
Collapse
|
4
|
Bao HY, Wang W, Sun HB, Chen JZ. Binding modes of GDP, GTP and GNP to NRAS deciphered by using Gaussian accelerated molecular dynamics simulations. SAR QSAR Environ Res 2023; 34:65-89. [PMID: 36762439 DOI: 10.1080/1062936x.2023.2165542] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [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: 11/23/2022] [Accepted: 12/31/2022] [Indexed: 06/18/2023]
Abstract
Probing binding modes of GDP, GTP and GNP to NRAS are of significance for understanding the regulation mechanism on the activity of RAS proteins. Four separate Gaussian accelerated molecular dynamics (GaMD) simulations were performed on the apo, GDP-, GTP- and GNP-bound NRAS. Dynamics analyses suggest that binding of three ligands highly affects conformational states of the switch domains from NRAS, which disturbs binding of NRAS to its effectors. The analyses of free energy landscapes (FELs) indicate that binding of GDP, GTP and GNP induces more energetic states of NRAS compared to the apo NRAS but the presence of GNP makes the switch domains more ordered than binding of GDP and GNP. The information of interaction networks of ligands with NRAS reveals that the π-π interaction of residue F28 and the salt bridge interactions of K16 and D119 with ligands stabilize binding of GDP, GTP and GNP to NRAS. Meanwhile magnesium ion plays a bridge role in interactions of ligands with NRAS, which is favourable for associations of GDP, GTP and GNP with NRAS. This work is expected to provide useful information for deeply understanding the function and activity of NRAS.
Collapse
Affiliation(s)
- H Y Bao
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - W Wang
- School of Science, Shandong Jiaotong University, Jinan, China
| | - H B Sun
- School of Science, Shandong Jiaotong University, Jinan, China
| | - J Z Chen
- School of Science, Shandong Jiaotong University, Jinan, China
| |
Collapse
|
5
|
Chen K, Chang L, Chen JZ, Wei X, Guo GJ, Lu JR, Wang K, Kang LN, Wang L, Xu B. [A case of primary cardiac lymphoma diagnosed by intravenous right atrial catheter forceps biopsy]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:1105-1107. [PMID: 36418280 DOI: 10.3760/cma.j.cn112148-20220303-00143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Affiliation(s)
- K Chen
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - L Chang
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - J Z Chen
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - X Wei
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - G J Guo
- Department of Ultrasound, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - J R Lu
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - K Wang
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - L N Kang
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - L Wang
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Biao Xu
- Department of Cardiology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| |
Collapse
|
6
|
Huai B, Liang MJ, Bai M, He HJ, Chen JZ, Wu H. Localization of CgVPE1 in secondary cell wall formation during tracheary element differentiation in the pericarp of Citrus grandis 'Tomentosa' fruits. Planta 2022; 256:89. [PMID: 36169724 DOI: 10.1007/s00425-022-04001-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
CgVPE1 is important in the differentiation of TE cells in C. grandis 'Tomentosa' fruits as it may directly affects secondary cell wall construction while participating in PCD. The vacuolar processing enzyme (VPE) plays an important role in both developmental and environmentally inducible programmed cell death (PCD); it was originally identified as a cysteine protease localized in the vacuole to activate and mature vacuolar proteins in plants. Interestingly, we found a VPE called CgVPE1 to be associated with deposition of the secondary cell wall in tracheary element (TE) cells in the pericarp of Citrus grandis 'Tomentosa' fruits. We then used ultrathin sections and the TUNEL assay to verify that PCD is involved in TE development. Furthermore, CgVPE1 was found to be mainly expressed in secretory cavities and TEs in the pericarp of Citrus grandis 'Tomentosa' fruits. Immunolocalization of CgVPE1 in the pericarp indicated that CgVPE1 is mainly distributed in the central large vacuole, endoplasmic reticulum, Golgi vesicles, cytosol, and secondary wall before TE maturation. CgVPE1 appeared earlier in the endoplasmic reticulum and Golgi vesicles of TEs cells. The vesicles containing CgVPE1 near the large central vacuole and secondary wall were observed, respectively. CgVPE1 proteins content in the cytoplasm decreased sharply, while the CgVPE1 content in the secondary cell wall did not change significantly after vacuole rupture. CgVPE1 protein contents in the secondary cell wall were significantly reduced until the TE cells developed into hollow thick-walled cells. Furthermore, labeling of VPE homologues in Arabidopsis thaliana using immunoelectron microscopy with anti-CgVPE1 antibody revealed that VPE homologues were specifically distributed in the secondary cell wall of stem TEs. Overall, these results suggested that CgVPE1 is not only involved PCD during TE cell development; furthermore, it may directly participate in the construction of plant secondary cell walls.
Collapse
Affiliation(s)
- B Huai
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
| | - M J Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
| | - M Bai
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - H J He
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China
- Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - J Z Chen
- College of Horticulture, South China Agricultural University, Guangzhou, 510642, China
| | - H Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, 510642, China.
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
- Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine, South China Agricultural University, Guangzhou, 510642, China.
| |
Collapse
|
7
|
Cheng X, Huang J, Li WF, Zhong T, Cai LJ, Li H, Guo YB, Chen JZ. [Analysis of the effect of microwave ablation in the treatment of small liver cancer]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:1059-1062. [PMID: 34933423 DOI: 10.3760/cma.j.cn501113-20200411-00176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To explore the clinical effect of microwave ablation in the treatment of early small liver cancer (≤3 cm). Methods: 103 cases with small liver cancer (tumor number < 3 and maximum tumor diameter < 3 cm) who underwent microwave ablation from November 2016 to November 2018 were retrospectively collected. The rate of residual lesions, recurrence rate one-year after the operation, and surgical complications were observed and grouped according to tumor size (< 2 cm and≥2 cm group) and tumor numbers (solitary and 2 ~ 3 lesion groups). The therapeutic effects of each group were compared and analyzed. Results: The tumor residual rate and one-year recurrence rate of small liver cancer after microwave ablation were 11.7% and 35.0%, respectively. The post-ablation syndrome incidence rate was 52.4%, with no serious adverse events. Compared with tumors < 2 cm, patients with≥2 cm had a higher postoperative residual rate (χ(2) = 7.651, P = 0.006), and the one-year recurrence rate of more solitary nodular tumors was lower (χ(2) = 10.125, P = 0.001). Conclusion: Microwave ablation is a safe and effective treatment for early small liver cancer, and it is more effective for small solitary nodules (< 2 cm).
Collapse
Affiliation(s)
- X Cheng
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Huang
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - W F Li
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - T Zhong
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - L J Cai
- Health Management Center, Nanfang Hospital, Southern Medical University, Guangzhou510515, China
| | - H Li
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Y B Guo
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Z Chen
- Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| |
Collapse
|
8
|
Abstract
Molecular targeted drugs are the first choice for systemic treatment of liver cancer. In the past decade, several anti-liver cancer targeted drugs have been launched. More recently, immunotherapy has become a dazzling nova in the field of systemic treatment of liver cancer. Nivolumab and pembrolizumab have been approved as second-line treatments for patients with advanced hepatocellular carcinoma treated with sorafenib. However, the effect of single-agent treatment is always unsatisfactory in advanced liver cancer. An increasing number of evidences suggests that molecular targeted drugs have important immunomodulatory effects for liver cancer, and several targeted combined immunotherapies have also shown promising clinical effectiveness. This paper reviews the immunomodulatory effects of several molecular targeted drugs in the field of liver cancer.
Collapse
Affiliation(s)
- X Cheng
- Department of Infectious Diseases, Nanfang Hospital of Southern Medical University, Guangzhou 510515, China
| | - J Z Chen
- Department of Infectious Diseases, Nanfang Hospital of Southern Medical University, Guangzhou 510515, China
| | - Y B Guo
- Department of Infectious Diseases, Nanfang Hospital of Southern Medical University, Guangzhou 510515, China
| |
Collapse
|
9
|
Chen JZ, Lu X, Hu YQ, Guo HH, Ma XL, Guo X, Jiang ZB, Wang F. [Research progress on chemical constituents and pharmacological studies on root bark of Lycium barbarum]. Zhongguo Zhong Yao Za Zhi 2021; 46:3066-3075. [PMID: 34467697 DOI: 10.19540/j.cnki.cjcmm.20210223.601] [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: 11/18/2022]
Abstract
Lycii Cortex, the dry root bark of Lycium barbarum(Solanaceae), is rich in chemical compositions with unique structures, such as organic acids, lipids, alkaloids, cyclopeptides and other components, and plays an important role in traditional Chinese medicine. It has the effect of cooling blood and removing steam, clearing lung and reducing fire. It is mainly used in the treatment of hot flashes due to Yin deficiency, hectic fever with night sweat, cough, hemoptysis and internal heat and diabetes. Modern pharmacological studies have shown that the crude extract or monomer of Lycii Cortex has a variety of pharmacological activities, such as hypoglycemic, hypotensive, hypolipidemic, antibacterial, and antiviral effects. In this paper, the chemical constituents and pharmacological effects of Cortex Lycii were reviewed in order to further clarify its effective substances, promote the development of medical undertakings, and ensure the "Healthy China" plan.
Collapse
Affiliation(s)
- Jing-Zhi Chen
- Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, School of Chemistry and Chemical Engineering, North Minzu University Yinchuan 750021, China
| | - Xing Lu
- Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, School of Chemistry and Chemical Engineering, North Minzu University Yinchuan 750021, China
| | - Yun-Qi Hu
- Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, School of Chemistry and Chemical Engineering, North Minzu University Yinchuan 750021, China
| | - Huan-Huan Guo
- Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, School of Chemistry and Chemical Engineering, North Minzu University Yinchuan 750021, China
| | - Xiao-Li Ma
- Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, School of Chemistry and Chemical Engineering, North Minzu University Yinchuan 750021, China
| | - Xin Guo
- Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, School of Chemistry and Chemical Engineering, North Minzu University Yinchuan 750021, China
| | - Zhi-Bo Jiang
- Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, School of Chemistry and Chemical Engineering, North Minzu University Yinchuan 750021, China
| | - Fang Wang
- Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences Yinchuan 750002, China
| |
Collapse
|
10
|
Gu L, An YB, Ren MY, Wang Q, Zhang HY, Yu G, Chen JZ, Wu M, Xiao Y, Fu ZC, Zhang H, Tong WD, Ma D, Xu Q, Yao HW, Zhang ZT. [Incidence and risk factors of anastomotic leak after transanal total mesorectal excision in China: a retrospective analysis based on national database]. Zhonghua Wei Chang Wai Ke Za Zhi 2021; 24:505-512. [PMID: 34148315 DOI: 10.3760/cma.j.cn.441530-20210226-00084] [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: Transanal total mesorectal excision (taTME) was a very hot topic in the first few years since its appearance, but now more introspections and controversies on this procedure have emerged. One of the reasons why the Norwegian Ministry of Health stopped taTME was the high incidence of postoperative anastomotic leak. In current study, the incidence and risk factors of anastomotic leak after taTME were analyzed based on the data registered in the Chinese taTME Registry Collaborative (CTRC). Methods: A case-control study was carried out. Between November 15, 2017 and December 31, 2020, clinical data of 1668 patients undergoing taTME procedure registered in the CTRC database from 43 domestic centers were collected retrospectively. After excluding 98 cases without anastomosis and 109 cases without complete postoperative complication data, 1461 patients were finally enrolled for analysis. There were 1036 males (70.9%) and 425 females (29.1%) with mean age of (58.2±15.6) years and mean body mass index of (23.6±3.8) kg/m(2). Anastomotic leak was diagnosed and classified according to the International Study Group of Rectal Cancer (ISREC) criteria. The risk factors associated with postoperative anastomotic leak cases were analyzed. The impact of the cumulative number of taTME surgeries in a single center on the incidence of anastomotic leak was evaluated. As for those centers with the number of taTME surgery ≥ 40 cases, incidence of anastomic leak between 20 cases of taTME surgery in the early and later phases was compared. Results: Of 1461 patients undergoing taTME, 103(7.0%) developed anastomotic leak, including 71 (68.9%) males and 32 (31.1%) females with mean age of (59.0±13.9) years and mean body mass index of (24.5±5.7) kg/m(2). The mean distance between anastomosis site and anal verge was (2.6±1.4) cm. Thirty-nine cases (37.9%) were classified as ISREC grade A, 30 cases (29.1%) as grade B and 34 cases (33.0%) as grade C. Anastomotic leak occurred in 89 cases (7.0%,89/1263) in the laparoscopic taTME group and 14 cases (7.1%, 14/198) in the pure taTME group. Multivariate analysis showed that hand-sewn anastomosis (P=0.004) and the absence of defunctioning stoma (P=0.013) were independently associated with anastomotic leak after taTME. In the 16 centers (37.2%) which performed ≥ 30 taTME surgeries with cumulative number of 1317 taTME surgeries, 86 cases developed anastomotic leak (6.5%, 86/1317). And in the 27 centers which performed less than 30 taTME surgeries with cumulative number of 144 taTME surgeries, 17 cases developed anastomotic leak (11.8%, 17/144). There was significant difference between two kinds of center (χ(2)=5.513, P=0.019). Thirteen centers performed ≥ 40 taTME surgeries. In the early phase (the first 20 cases in each center), 29 cases (11.2%, 29/260) developed anastomotic leak, and in the later phase, 12 cases (4.6%, 12/260) developed anastomotic leak. The difference between the early phase and the later phase was statistically significant (χ(2)=7.652, P=0.006). Conclusion: The incidence of anastomotic leak after taTME may be reduced by using stapler and defunctioning stoma, or by accumulating experience.
Collapse
Affiliation(s)
- L Gu
- Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - Y B An
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory of Cancer Invasion and Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing 100050, China
| | - M Y Ren
- Department of Gastrointestinal Surgery, The Affiliated Nanchong Central Hospital of North Sichuan Medical College, Nanchong 637900, Sichuan Province, China
| | - Q Wang
- Department of Gastrointestinal Surgery, The First Hospital of Jilin University, Changchun 130021, China
| | - H Y Zhang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400042, China
| | - G Yu
- Department of Gastrointestinal Surgery, Linzi People's Hospital, Linzi 255200, Shandong Province, China
| | - J Z Chen
- Department of Surgery, Koo Foundation, Sun Yat-sen Cancer Center, Taipei, Taiwan 112, China
| | - M Wu
- Department of Gastrointestinal Hernial Surgery, Yibin Second People's Hospital, Yibin 644000, Sichuan Province, China
| | - Y Xiao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Z C Fu
- Department of Surgery, Mary Hospital, Hong Kong 999077, China
| | - H Zhang
- Department of Colorectal Cancer, Shengjing Hospital, China Medical University, Shenyang 110004, China
| | - W D Tong
- Department of General Surgery, Daping Hospital, Army Medical University, Chongqing 400042, China
| | - D Ma
- Department of General Surgery, Xinqiao Hospital, Army Medical University, Chongqing 400037, China
| | - Q Xu
- Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - H W Yao
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory of Cancer Invasion and Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing 100050, China
| | - Z T Zhang
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory of Cancer Invasion and Metastasis Research & National Clinical Research Center for Digestive Diseases, Beijing 100050, China
| |
Collapse
|
11
|
Liang SS, Liu XG, Cui YX, Zhang SL, Zhang QG, Chen JZ. Molecular mechanism concerning conformational changes of CDK2 mediated by binding of inhibitors using molecular dynamics simulations and principal component analysis. SAR QSAR Environ Res 2021; 32:1-22. [PMID: 34130570 DOI: 10.1080/1062936x.2021.1934896] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 05/23/2021] [Indexed: 06/12/2023]
Abstract
Cyclin-dependent kinase 2 (CDK2) has been regarded as a promising drug target for anti-tumour agents. In this study, molecular dynamics (MD) simulations and principal component (PC) analysis were used to explore binding mechanism of three inhibitors 1PU, CDK, 50Z to CDK2 and influences of their bindings on conformational changes of CDK2. The results show that bindings of inhibitors yield obvious impacts on internal dynamics, movement patterns and conformational changes of CDK2. In addition, molecular mechanics generalized Born surface area (MM-GBSA) was applied to calculate binding free energies between three inhibitors and CDK2 and evaluate their binding ability to CDK2. The results show that CDK has the strongest binding to CDK2 among the current three inhibitors. Residue-based free energy decomposition method was further utilized to decode the contributions of a single residue to binding of inhibitors, and it was found that three inhibitors not only produce hydrogen bonding interactions and hydrophobic interactions with key residues of CDK2, which promotes binding of three inhibitors to CDK2, but also share similar binding modes. This work is expected to be helpful for design of efficient drugs targeting CDK2.
Collapse
Affiliation(s)
- S S Liang
- School of Physics and Electronics, Shandong Normal University, Jinan, China
| | - X G Liu
- School of Physics and Electronics, Shandong Normal University, Jinan, China
| | - Y X Cui
- School of Physics and Electronics, Shandong Normal University, Jinan, China
| | - S L Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan, China
| | - Q G Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan, China
| | - J Z Chen
- School of Science, Shandong Jiaotong University, Jinan, China
| |
Collapse
|
12
|
Yuan GS, He WM, Hu XY, Li Q, Zang MY, Cheng X, Huang W, Ruan J, Wang JJ, Hou JL, Chen JZ. [Clinical efficacy and safety analysis of camrelizumab combined with apatinib as a second-line therapy for unresectable hepatocellular carcinoma: a multicenter retrospective study]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:326-331. [PMID: 33979958 DOI: 10.3760/cma.j.cn501113-20210329-00148] [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 clinical efficacy and safety of camrelizumab combined with apatinib as a second-line therapy for unresectable hepatocellular carcinoma (HCC). Methods: Ninety-four cases with mid-and advanced-stage HCC who received camrelizumab combined with apatinib as second-line treatment were enrolled. Routine blood test, blood biochemical indexes, tumor stage, tumor imaging characteristics, previous treatment strategies and other clinical data before treatment were documented. Imaging examination follow-up results and adverse reactions during treatment were followed up until the end of follow-up or loss of follow-up or death. Kaplan-Meier method was used to analyze the clinical efficacy. Results: As of the last follow-up, 94 cases with mid-and advanced-stage HCC had received camrelizumab combined with apatinib as second-line treatment. Among them, 15 cases were lost to follow-up, 31 cases died, and 48 cases survived. The overall remission rate was 31.9%. The overall disease control rate was 71.3%. The median time to disease-free progression was 6.6 months. The median time to disease progression was not yet available. The 1-year cumulative survival rate was 62.3%. Grade 3 and above adverse reactions mainly included were thrombocytopenia (7.4%), abdominal pain (4.3%), active hepatitis (4.3%), leukopenia (4.3%), diarrhea (3.2%), hand-foot syndrome (3.2%). All adverse reactions were effectively controlled. Conclusion: Camrelizumab combined with apatinib can effectively prolong the survival period of patients with mid-and advanced-stage HCC, and it is well tolerated.
Collapse
Affiliation(s)
- G S Yuan
- Department of Infectious Diseases and Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - W M He
- Department of Infectious Diseases and Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - X Y Hu
- Department of Infectious Diseases and Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Q Li
- Department of Infectious Diseases and Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - M Y Zang
- Department of Infectious Diseases and Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - X Cheng
- Department of Hepatology, Zengcheng Branch of Nanfang Hospital, Southern Medical University, Zengcheng 511300, China
| | - W Huang
- Department of Oncology, Shunde Hospital, Southern Medical University, Shunde 528300, China
| | - J Ruan
- Department of Medical Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310000, China
| | - J J Wang
- Department of Infectious Disease, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260, China
| | - J L Hou
- Department of Infectious Diseases and Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Z Chen
- Department of Infectious Diseases and Hepatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| |
Collapse
|
13
|
Jiang ZB, Chen JZ, Guo HH, Hu YQ, Guo X, Ma XL, Yang JL, Wang F, Zhang DZ, Wu XL. [A new 9,19-cycloartane glycoside from Asplenium ruprechtii]. Zhongguo Zhong Yao Za Zhi 2021; 46:1155-1159. [PMID: 33787110 DOI: 10.19540/j.cnki.cjcmm.20201222.602] [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: 11/18/2022]
Abstract
Chemical constituents of water extracts of Asplenium ruprechtii were investigated. Five compounds were isolated by silica gel, Sephadex LH-20 gel column chromatographies and preparative HPLC, and their structures were identified by various spectral analyses as aspleniumside G(1), trans-p-coumaric acid(2), trans-p-coumaric acid 4-O-β-D-glucoside(3), cis-p-coumaric acid 4-O-β-D-glucoside(4), and(E)-ferulic acid-4-O-β-D-glucoside(5). Among them, compound 1 is a new 9,19-cycloartane glycoside.
Collapse
Affiliation(s)
- Zhi-Bo Jiang
- School of Chemistry and Chemical Engineering,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission,North Minzu University Yinchuan 750021,China
| | - Jing-Zhi Chen
- School of Chemistry and Chemical Engineering,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission,North Minzu University Yinchuan 750021,China
| | - Huan-Huan Guo
- School of Chemistry and Chemical Engineering,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission,North Minzu University Yinchuan 750021,China
| | - Yun-Qi Hu
- School of Chemistry and Chemical Engineering,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission,North Minzu University Yinchuan 750021,China
| | - Xin Guo
- School of Chemistry and Chemical Engineering,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission,North Minzu University Yinchuan 750021,China
| | - Xiao-Li Ma
- School of Chemistry and Chemical Engineering,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission,North Minzu University Yinchuan 750021,China
| | - Jing-Ling Yang
- School of Chemistry and Chemical Engineering,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission,North Minzu University Yinchuan 750021,China
| | - Fang Wang
- Institute of Traditional Chinese Medicine,Shandong Academy of Pharmaceutical Sciences Ji'nan 250101,China
| | - Dai-Zhou Zhang
- Institute of Traditional Chinese Medicine,Shandong Academy of Pharmaceutical Sciences Ji'nan 250101,China
| | - Xiu-Li Wu
- College of Pharmacy,Ningxia Medical University Yinchuan 750004,China
| |
Collapse
|
14
|
Ma XL, Chen JZ, Lu X, Zhe YT, Jiang ZB. HPLC coupled with quadrupole time of flight tandem mass spectrometry for analysis of glycosylated components from the fresh flowers of two congeneric species: Robinia hispida L. and Robinia pseudoacacia L. J Sep Sci 2021; 44:1537-1551. [PMID: 33386775 DOI: 10.1002/jssc.202001068] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 12/29/2020] [Accepted: 12/30/2020] [Indexed: 11/07/2022]
Abstract
Developing methods for the systematic and rapid identification of the chemical compositions of fresh plant tissues has long attracted the attention of phytochemists and pharmacologists. In the present study, based on highly efficient sample pretreatment and high-throughput analysis of high-performance liquid chromatography coupled with quadrupole time of flight tandem mass spectrometry data using molecular networks, a method was developed for systematically analyzing the chemical constituents of the fresh flowers of Robinia hispida L. and Robina pseudoacacia L., two congeneric ornamental species that lack prior consideration. A total of 44 glycosylated structures were characterized. And on the basis of establishing of the fragmentation pathways of 11 known flavonoid glycosides, together with the molecular networking analysis, 18 other ions of flavonoid glycosides in five classes were clustered. Moreover, 15 soyasaponins/triterpenoid glycosides were tentatively identified by comparison of their tandem mass spectrometry characteristic ions with those reported in the literature or the online Global Natural Product Social Molecular Networking database. The water extracts were separated by flash chromatography, which resulted in the discovery of one new compound, named rohispidascopolin, along with five known entities. The pharmacological targets were predicted by SwissTargetPrediction.
Collapse
Affiliation(s)
- Xiao-Li Ma
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, P. R. China.,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, Yinchuan, P. R. China
| | - Jing-Zhi Chen
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, P. R. China
| | - Xing Lu
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, P. R. China
| | - Ya-Ting Zhe
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, P. R. China
| | - Zhi-Bo Jiang
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, P. R. China.,Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, Yinchuan, P. R. China
| |
Collapse
|
15
|
Jiang ZB, Lu X, Chen JZ, Ma XL, Ke YH, Guo X, Liu H, Li CL, Wang F, Wu XL, Zhang DZ, Cao S. Identification of active chemical constituents of Asplenium ruprechtii Sa. Kurata based on in vitro neuroprotective activity evaluation. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
16
|
Jiang ZB, Liu XX, Chen JZ, Guo HH, Hu YQ, Guo X, Ma XL, Wang F, Zhang DZ, Wu XL. Structural Determination of a New Cycloartane Glycoside from Asplenium ruprechtii. Chem Biodivers 2020; 17:e2000500. [PMID: 33078897 DOI: 10.1002/cbdv.202000500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 10/19/2020] [Indexed: 11/09/2022]
Abstract
We characterized a new cycloartane glycoside, herein known as aspleniumside F (1), along with five known compounds as kaempferol-3-O-[(6-O-(E)-feruloyl)-β-D-glucopyranosyl]-(1→2)-β-D-galacopyranoside (2), quercetin-3-O-[(6-O-(E)-feruloyl)-β-D-glucopyranosyl]-(1→2)-β-D-glucopyranoside (3), kaempferol-3-O-[(6-O-(E)-caffeoyl)-β-D-glucopyranosyl]-(1→2)-β-D-glucopyranoside (4), kaempferol-3-O-[(6-O-(E)-caffeoyl)-β-D-glucopyranosyl]-(1→2)-β-D-glucopyranosyl-7-O-β-D-glucopyranoside (5), and kaempferol-3-O-[(6-O-p-coumaroyl)-β-D-glucopyranosyl]-(1→2)-β-D-glucopyranosyl-7-O-β-D-glucopyranoside (6), from Asplenium ruprechtii Sa. Kurata, a folk medicine widely used to treat Thromboangiitis obliterans in China, Japan, and Korea. Based on spectroscopic, mainly 1D-, 2D-NMR and (+)-HR-ESI-MS, analyses as well as through comparisons with previous reports, its chemical structure was determined as 3β,24,30-tri-β-D-glucopyranosyl-23,25-dihydroxycycloartane (= (23R,24R)-3β,24-bis-(β-D-glucopyranosyloxy)-23,25-dihydroxy-9β-9,19-cyclolanostan-29-yl β-D-glucopyranoside). According to the 1 H coupling constant of anomeric protons and co-TLC of the acid hydrolysate with D-glucose, all three glycoside groups in 1 were revealed as β-D-glucopyranosyl. Furthermore, SOD-like antioxidant activity evaluation via IC50 of 12.43, 6.78, 9.12, 6.94 and 4.85 μM revealed that compounds 2-6 had bioactivity.
Collapse
Affiliation(s)
- Zhi-Bo Jiang
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, and Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, P. R. China
| | - Xiao-Xi Liu
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, P. R. China
| | - Jing-Zhi Chen
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, and Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, P. R. China
| | - Huan-Huan Guo
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, and Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, P. R. China
| | - Yun-Qi Hu
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, and Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, P. R. China
| | - Xin Guo
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, and Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, P. R. China
| | - Xiao-Li Ma
- Department of Pharmaceutical Engineering, School of Chemistry and Chemical Engineering, and Key Laboratory of Chemical Engineering and Technology of State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, P. R. China
| | - Fang Wang
- Institute of Traditional Chinese Medicine, Shandong Academy of Pharmaceutical Sciences, Jinan, 250101, P. R. China
| | - Dai-Zhou Zhang
- Institute of Traditional Chinese Medicine, Shandong Academy of Pharmaceutical Sciences, Jinan, 250101, P. R. China
| | - Xiu-Li Wu
- College of Pharmacy, Ningxia Medical University, Yinchuan, 750004, P. R. China
| |
Collapse
|
17
|
Jiang ZB, Chen YX, Chen JZ, Lu X, Guo X, Ma BZ, Li CL, Fang X, Tang YH, Ma XL. Exploring Chemical Structures From Cortex Lycii, Based on Manual and Automatic Analysis of the HPLC-Q-TOF-MS Data. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20911255] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Cortex Lycii, the root barks of Lycium barbarum and L. chinense, known as “di gu pi” in traditional Chinese herbal drugs, is an important ingredient of formulations used for treating a variety of diseases. During the last 3 decades, more than 70 chemical entities have been separated and purified from either the aqueous or aqueous ethyl alcohol extracts of Cortex Lycii. In this study, high-performance liquid chromatography together with quadrupole-time-of-flight mass spectrometry (MS) was employed to explore new analog structures from aqueous ethyl alcohol extracts (50%, v/v), which led us to discover 4 new phenolic amides and a new cyclic peptide. The structure-based manual screening method, on the basis of the analysis of the fragmentation pathway of the previously known compounds, was used to make a preliminary analysis of the negative total ion chromatography and negative extract ion spectra. Three ions at m/ z 472.1, 314.1, and 445.2 were assigned to phenolic amides, and by further analysis of their MS/MS data, the structure of 1, corresponding to one of them ( m/ z 314.1), was illustrated as an analog of the known compound KN1. A parent ion at m/ z 856.1 was assigned to a cyclic peptide analog (2) in the manual analysis procedure. Furthermore, the MS/MS data were profiled on the Global Natural Product Social Molecular Networking (GNPS, https://gnps.ucsd.edu/ProteoSAFe/static/gnps-splash.jsp ) workflow to weave a visualization molecular network. Three more new analog ions ( m/ z 604.3 [3], 597.3 [4], and 611.3 [5]) were found in the aggregation of KN5 and KN7, and their structures were all determined by comparisons with known compounds. This manual and networking automatic screening method may provide a sensitive and efficient procedure to facilitate the mining of novel trace components.
Collapse
Affiliation(s)
- Zhi-Bo Jiang
- Department of Bioengineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
- Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China
| | - Yong-Xin Chen
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- Key Laboratory of Petroleum Resources, Lanzhou, China
| | - Jing-Zhi Chen
- Department of Bioengineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
- Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China
| | - Xing Lu
- Department of Bioengineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
- Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China
| | - Xin Guo
- Department of Bioengineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
- Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China
| | - Bing-Zhen Ma
- Department of Bioengineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
- Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China
| | - Chong-Long Li
- Department of Bioengineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
- Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China
| | - Xuan Fang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- Key Laboratory of Petroleum Resources, Lanzhou, China
| | | | - Xiao-Li Ma
- Department of Bioengineering, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
- Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China
| |
Collapse
|
18
|
Du YX, Chen JZ, Wang J, Chen BQ. [Clinical analysis of delayed epistaxis after craniofacial trauma in 16 patients]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1343-1345;1351. [PMID: 29798453 DOI: 10.13201/j.issn.1001-1781.2016.17.001] [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] [Received: 06/23/2016] [Indexed: 11/12/2022]
Abstract
Objective:To investigate the etiology,clinical presentations,diagnosis and treatment of delayed epistaxis after craniocerebral trauma.Method:A retrospective analysis was made including 16 cases who had the traumatic carotid artery injury with massive delayed epistaxis.All of them were finally diagnosed by digital substraction angiography(DSA).Final clinical outcome,radiographic data and follow-up data were analyzed.Result:Two cases of traumatic pesudoaneurysm from internal maxillary artery were embolized with polyvinyl alcohol particles and gelatin sponge.Fourteen cases of traumatic pesudoaneurysm located in ICA cavernous segment was embolized by covered stent.The covered stent placement was successful in all 14 pseudoaneurysms.No procedure-related complications or deaths occurred during follow-up except one of the case with visual field defects and another case with vision loss.Conclusion:Patients with delayed massive epistaxis or recurrent epistaxis after craniofacial trauma which cause pesudoaneurysm should undergo CTA,MRA or DSA examination,and it is would help to get proper diagnosis and treatment as early as possible.No recurrence was found after successful endovascular techniques.
Collapse
Affiliation(s)
- Y X Du
- Department of Otolaryngology,General Hospital of Pingmei Shenma Medical Group,Pingdingshan,467000,China
| | - J Z Chen
- Department of Radiotherapy,General Hospital of Pingmei Shenma Medical Group
| | - J Wang
- Department of Otolaryngology,General Hospital of Pingmei Shenma Medical Group,Pingdingshan,467000,China
| | - B Q Chen
- Department of Otolaryngology,General Hospital of Pingmei Shenma Medical Group,Pingdingshan,467000,China
| |
Collapse
|
19
|
Zheng Y, Qiu LP, Meng SL, Fan LM, Song C, Li DD, Zhang C, Chen JZ. Effect of polychlorinated biphenyls on oxidation stress in the liver of juvenile GIFT, Oreochromis niloticus. Genet Mol Res 2016; 15:gmr8613. [PMID: 27706695 DOI: 10.4238/gmr.15038613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The present study clearly showed that chronic exposure to polychlorinated biphenyls (PCBs) at environmentally relevant concentrations can damage juvenile tilapia livers by modulating antioxidant enzyme activities and gene transcription, which affects toxic bioaccumulation and histological congestion. The results suggest that PCBs caused a decrease in the activity of some hepatic antioxidative and biotransformation enzymes (SOD, CAT, GST, T-GSH, and MDA) in tilapia at 7 days, as well as transcriptional changes (sod, cat, and gst). Except for some antioxidant parameters (T-GSH, GSH/GSSG, T-AOC, and MDA), significant declines and increases occurred at 14 and 21 days, respectively. Most of the antioxidant enzymatic signatures and genotoxicity significantly increased at 14 and 21 days. This study presented evidence that PCBs could result in hepatic toxicity through oxidative stress in the early growth stages of tilapia, and we speculated that oxidative stress plays an important role in embryonic developmental toxicity induced by PCBs.
Collapse
Affiliation(s)
- Y Zheng
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China .,Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China
| | - L P Qiu
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China
| | - S L Meng
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China
| | - L M Fan
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China
| | - C Song
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China
| | - D D Li
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China
| | - C Zhang
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China
| | - J Z Chen
- Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Wuxi, China.,Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China
| |
Collapse
|
20
|
Zheng Y, Chen JZ, Wang HP, Li M, Liang HW, Bing XW, Wang ZZ. Large-scale tissue-specific and temporal gene expression profiles in Pengze crucian carp. Genet Mol Res 2016; 15:gmr7642. [PMID: 27051032 DOI: 10.4238/gmr.15017642] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In the present study, the tissue-specific and temporal gene expression profiles of four catalogues of gonadal development-related genes (sex differentiation-related, steroid receptor, steroidogenic, and structural genes) were detected in nine tissues and during 11 successive developmental stages in the Pengze crucian carp (Pcc) (a triploid mono-female gynogenic fish). The results showed that these target genes exhibited overlapping distributions in various tissues, with the exception of Pcc-vasa and Pcc-cyp17a1. Gene expression profiling of the developmental stages showed that all of the target genes simultaneously reached peak expression levels at 40 and 48 days post hatching (dph). Both 40 and 48 dph appeared to be two key time points associated with the process of Pcc gonadal development. These data will provide a clear understanding of gene expression patterns associated with the gonadal development-related genes of this gynogenic teleost.
Collapse
Affiliation(s)
- Y Zheng
- Key Open Laboratory of Ecological Environment and Resources of Inland Fisheries, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences; Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Ministry of Agriculture, Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China.,College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, Shaanxi, China
| | - J Z Chen
- Key Open Laboratory of Ecological Environment and Resources of Inland Fisheries, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences; Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Ministry of Agriculture, Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China
| | - H P Wang
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, Shaanxi, China
| | - M Li
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, Shaanxi, China
| | - H W Liang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, China
| | - X W Bing
- Key Open Laboratory of Ecological Environment and Resources of Inland Fisheries, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences; Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Ministry of Agriculture, Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, China
| | - Z Z Wang
- College of Animal Science and Technology, Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, Shaanxi, China
| |
Collapse
|
21
|
Yen YC, Chen PH, Chen JZ, Chen JA, Lin KJ. Plasmon-induced efficiency enhancement on dye-sensitized solar cell by a 3D TNW-AuNP layer. ACS Appl Mater Interfaces 2015; 7:1892-1898. [PMID: 25548958 DOI: 10.1021/am507668j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A new 3D TNW-AuNP plasmonic electrode consists of antireflective (AR) TiO2 nanowires (TNWs) (∼600 nm thickness) serving as light-harvesting antennae coupling with Au nanoparticles (NPs). A huge red-shift of 55 nm is observed in surface plasmon spectra for the Au (11 nm) plasmonic electrode that has 11 nm size Au NPs, whereby (111) lattice planes have a specific bonding with the TiO2 (101) planes. Remarkable red-shift is mainly attributed to the localized electric field improvement resulting from the plasmonic coupling effect between the Au NPs and the Au-TiO2 hybrids. After TiCl4 treatment, this favorable Au (11 nm) nanostructure takes advantage of harvesting photons to increase the conversion efficiency of dye-sensitized solar cells (DSSCs) from 6.25% to 9.73%.
Collapse
Affiliation(s)
- Yin-Cheng Yen
- Department of Chemistry, National Chung Hsing University , Taichung 40227, Taiwan, Republic of China
| | | | | | | | | |
Collapse
|
22
|
Chen JZ, Ahn H, Yen SC, Tsai YJ. Thermally induced percolational transition and thermal stability of silver nanowire networks studied by THz spectroscopy. ACS Appl Mater Interfaces 2014; 6:20994-20999. [PMID: 25402346 DOI: 10.1021/am5057618] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Great demand toward flexible optoelectronic devices finds metal nanowires (NWs) the most promising flexible transparent conducting material with superior mechanical properties. However, ultrathin metal nanowires suffer from relatively poor thermal stability and sheet conductance, attributed to the poor adhesivity of the ohmic contact between nanowires. Thermal heating and annealing at 200 °C increase the conductivity of the metal network, but prolonged annealing accelerates the breakage of NWs near the NW junction and the formation of Ag droplets. In this study, the thermal stability of silver NW (AgNW) films is investigated through the in situ measurements of sheet resistance and terahertz (THz) conductivity. With the improved ohmic contact at the NW junctions by heating, a characteristic transition from the subpercolative to percolative network is observed by in situ THz spectroscopy. It is found that stamp-transferred graphene incorporated with a near-percolative AgNW network can dramatically enhance the thermal stability of the graphene-AgNW (GAgNW) hybrid film. In both in situ measurements, little variation of physical parameters in GAgNW film is observed for up to 3 h of annealing. The presented results offer the potential of graphene-incorporated metal nanowire film as a highly conductive electrode that also has high thermal stability and excellent transparency for next-generation electronics and optoelectronics on flexible substrates.
Collapse
Affiliation(s)
- Jing-Zhi Chen
- Department of Photonics, National Chiao-Tung University , Hsinchu 30010, Taiwan, Republic of China
| | | | | | | |
Collapse
|
23
|
Abstract
A 3-dimensional chain-network anatase/TiO2 (B) was obtained via the basic hydrothermal treatment of a sandwich Ti/TiO2/Ti film on a glass substrate that was prepared from 16 nm anatase TiO2 nanoparticles. The Ti film was converted to the TiO2 (B) phase in a Teflon vessel containing a 10 M NaOH aqueous solution that was encapsulated in a stainless-steel autoclave and heated at 130 °C for 2 h. The TiO2 (B) then served as a binder layer that enabled the formation of pearl-necklace chains made of anatase TiO2 nanoparticles, and these chain-like structures thoroughly interpenetrated into the textured layer. Decomposition tests using methylene blue indicated that the chain-network anatase/TiO2 (B) mixed-phase film had a photocatalytic half-life that was 0.84 and 0.69 times shorter than those of as-prepared anatase TiO2 and P25, respectively. In addition, the intensity of the room temperature photoluminescence spectra of anatase TiO2 was 2.55-fold higher than that of the chain-network anatase/TiO2 (B). We thus conclude that the remarkable photocatalytic activity of the chain-network anatase/TiO2 (B) is attributed to the chain-network structural characteristics and a synergistic effect of the matching band gap potentials, which increases the transfer of photogenerated electrons and reduces electron-hole recombination.
Collapse
Affiliation(s)
- Yin-Cheng Yen
- Department of Chemistry, National Chung Hsing University, Taichung 40227, Taiwan, Republic of China
| | | | | | | | | |
Collapse
|
24
|
|
25
|
Pan QF, Li WT, Dong HC, Chen YZ, Yin L, Liu W, Wang WW, Liu D, Li SG, Gu WY, Chen JZ, Yang L, Zhang WJ, Li F. PTEN hypermethylation profiles of Chinese Kazakh patients with esophageal squamous cell carcinoma. Dis Esophagus 2013; 27:396-402. [PMID: 23980519 DOI: 10.1111/dote.12106] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Aberrant DNA methylation of promoter region CpG islands may serve as an alternative mechanism to genetic defects in the inactivation of tumor suppressor genes (TSGs) in human malignancies. The aim of this study was to examine the promoter methylation status of the PTEN TSG and its association with esophageal squamous cell carcinoma (ESCC) carcinogenesis in a Chinese Kazakh population, which is known to have a relatively high ESCC incidence and mortality. The methylation status of the PTEN promoter region was determined in patients with ESCC (n = 95) and healthy individuals (n = 65) using highly sensitive Sequenom Epityper assays. The methylation level of the PTEN gene was significantly higher in patients with ESCC than in healthy controls. The median methylation level was 10.0% (interquartile range [IQR]: 7.0-11.0%) in patients with ESCC and 6.0% in controls (IQR: 4.0-9.0%; P = 0.001). PTEN methylation levels were higher in male patients with ESCC than in male controls, whereas a trend toward significance was observed between female patients with ESCC and female controls (P = 0.005 and P = 0.086, respectively). The PTEN methylation level was associated with histopathological grade and lymph node metastasis in patients with ESCC (P = 0.002 and P = 0.009, respectively). To our knowledge, this is the first report to show the presence of PTEN promoter CpG hypermethylation in ESCC and its association with tumor metastasis.
Collapse
Affiliation(s)
- Q F Pan
- Department of Pathology and Key Laboratory for Xinjiang Endemic and Ethnic Diseases, Shihezi University School of Medicine, Shihezi, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Yen YC, Ko WY, Chen JZ, Lin KJ. Enhancing the performance of dye-sensitized solar cells based on TiO2 nanotube/nanoparticle composite photoanodes. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.04.128] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
27
|
Fakir H, Gaede S, Mulligan M, Chen JZ. Development of a novel ArcCHECK(™) insert for routine quality assurance of VMAT delivery including dose calculation with inhomogeneities. Med Phys 2012; 39:4203-8. [PMID: 22830753 DOI: 10.1118/1.4728222] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To design a versatile, nonhomogeneous insert for the dose verification phantom ArcCHECK(™) (Sun Nuclear Corp., FL) and to demonstrate its usefulness for the verification of dose distributions in inhomogeneous media. As an example, we demonstrate it can be used clinically for routine quality assurance of two volumetric modulated arc therapy (VMAT) systems for lung stereotactic body radiation therapy (SBRT): SmartArc(®) (Pinnacle(3), Philips Radiation Oncology Systems, Fitchburg, WI) and RapidArc(®) (Eclipse(™), Varian Medical Systems, Palo Alto, CA). METHODS The cylindrical detector array ArcCHECK(™) has a retractable homogeneous acrylic insert. In this work, we designed and manufactured a customized heterogeneous insert with densities that simulate soft tissue, lung, bone, and air. The insert offers several possible heterogeneity configurations and multiple locations for point dose measurements. SmartArc(®) and RapidArc(®) plans for lung SBRT were generated and copied to ArcCHECK(™) for each inhomogeneity configuration. Dose delivery was done on a Varian 2100 ix linac. The evaluation of dose distributions was based on gamma analysis of the diode measurements and point doses measurements at different positions near the inhomogeneities. RESULTS The insert was successfully manufactured and tested with different measurements of VMAT plans. Dose distributions measured with the homogeneous insert showed gamma passing rates similar to our clinical results (∼99%) for both treatment-planning systems. Using nonhomogeneous inserts decreased the passing rates by up to 3.6% in the examples studied. Overall, SmartArc(®) plans showed better gamma passing rates for nonhomogeneous measurements. The discrepancy between calculated and measured point doses was increased up to 6.5% for the nonhomogeneous insert depending on the inhomogeneity configuration and measurement location. SmartArc(®) and RapidArc(®) plans had similar plan quality but RapidArc(®) plans had significantly higher monitor units (up to 70%). CONCLUSIONS A versatile, nonhomogeneous insert was developed for ArcCHECK(™) for an easy and quick evaluation of dose calculations with nonhomogeneous media and for comparison of different treatment planning systems. The device was tested for SmartArc(®) and RapidArc(®) plans for lung SBRT, showing the uncertainties of dose calculations with inhomogeneities. The new insert combines the convenience of the ArcCHECK(™) and the possibility of assessing dose distributions in inhomogeneous media.
Collapse
Affiliation(s)
- H Fakir
- Department of Physics, London Regional Cancer Program, London, Ontario N6A 4L6, Canada.
| | | | | | | |
Collapse
|
28
|
Chen JZ, Ko WY, Yen YC, Chen PH, Lin KJ. Hydrothermally processed TiO2 nanowire electrodes with antireflective and electrochromic properties. ACS Nano 2012; 6:6633-9. [PMID: 22757633 DOI: 10.1021/nn300787r] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Dual functionalities of antireflective and electrochromic properties-based anatase TiO(2) nanowire devices with a high-porosity cross-linked geometry directly grown onto transparent conductive glass was achieved for the first time through a simple one-step hydrothermal process under mild alkali conditions. Devices fashioned from these TiO(2) nanowires were found to display enhanced optical transparency in the visible range, better color contrast, and faster color-switching time in comparison to devices made from nanoparticles. These improvements can be attributed to the low refractive index and high porosity of the TiO(2) nanowires and their larger accessible surface area for Li(+) intercalation and deintercalation, leading to enhanced capabilities for transparent electrochromic smart windows.
Collapse
Affiliation(s)
- Jing-Zhi Chen
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
| | | | | | | | | |
Collapse
|
29
|
Fakir H, Hoover D, Chen JZ. Poster - Thur Eve - 64: Evaluation of SmartArc and RapidArc for lung SBRT treatment planning and delivery. Med Phys 2012; 39:4637. [DOI: 10.1118/1.4740172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
30
|
Liu XX, Li SH, Chen JZ, Sun K, Wang XJ, Wang XG, Hui RT. Effect of soy isoflavones on blood pressure: a meta-analysis of randomized controlled trials. Nutr Metab Cardiovasc Dis 2012; 22:463-70. [PMID: 21310599 DOI: 10.1016/j.numecd.2010.09.006] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 08/19/2010] [Accepted: 09/17/2010] [Indexed: 01/17/2023]
Abstract
BACKGROUND AND AIM The effect of soy isoflavones on blood pressure is controversial. The objective of this study was to evaluate the effect of dietary soy isoflavones on blood pressure. METHODS AND RESULTS Trials were searched in PubMed, the Cochrane Library, Embase and references cited in related reviews and studies. A total of eleven trials were reviewed. Meta-analysis results showed a mean decrease of 2.5 mm Hg (95% CIs, - 5.35 to 0.34 mm Hg; P = 0.08) for systolic blood pressure and 1.5 mm Hg (95% CIs, - 3.09 to 0.17 mm Hg; P = 0.08) for diastolic blood pressure in the soy isoflavones-treated group compared to placebo. Meta-regression and subgroup analyses indicated that blood pressure status was a significant predictor of heterogeneity for the effect of soy isoflavones on blood pressure. Subgroup analysis of hypertensive subjects revealed that a greater blood pressure reduction was identified in the soy isoflavone-treated group compared to placebo (5 trials; SBP: - 5.94, 95% CIs [- 10.55, - 1.34] mm Hg, P = 0.01; DBP: - 3.35, 95% CIs [- 6.52, - 0.19] mm Hg, P = 0.04). In contrast, treatment with soy isoflavones did not lead to a significant reduction in blood pressure in normotensive subjects (6 trials; SBP: 0.29, 95% CIs [- 2.39, 2.97] mm Hg, P = 0.83; DBP: - 0.43, 95% CIs [- 1.66, 0.81] mm Hg, P = 0.50). CONCLUSION Soy isoflavones had an effect of lowering blood pressure in hypertensive subjects, but not in normotensive subjects. Larger trials need to be carried out to confirm the present findings.
Collapse
Affiliation(s)
- X X Liu
- The Key Laboratory of Clinical Cardiovascular Genetics, Ministry of Education and Sino-German Laboratory for Molecular Medicine, Beijing, PR China
| | | | | | | | | | | | | |
Collapse
|
31
|
Chen JZ, Yen YC, Ko WY, Cheng CY, Lin KJ. The role of the fabrication of anatase-TiO2 chain-networked photoanodes. Adv Mater 2011; 23:3970-3973. [PMID: 21796685 DOI: 10.1002/adma.201101485] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 05/27/2011] [Indexed: 05/31/2023]
Affiliation(s)
- Jing-Zhi Chen
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
| | | | | | | | | |
Collapse
|
32
|
Chen JZ, Ye JY, Zhang HY, Jiang XJ, Zhang YX, Liu ZL. Freshwater toxic cyanobacteria induced DNA damage in apple (Malus pumila), rape (Brassica napus) and rice (Oryza sativa). J Hazard Mater 2011; 190:240-244. [PMID: 21497440 DOI: 10.1016/j.jhazmat.2011.03.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 02/21/2011] [Accepted: 03/10/2011] [Indexed: 05/30/2023]
Abstract
Cyanobacteria in freshwater ecosystems can present a harmful effect on growth and development of plants through irrigation with contaminated water. In this study, the effects of microcystins (MCs)-containing cyanobacteria extract (CE) on DNA damage of apple, rape and rice were investigated to explore the phytotoxic mechanism of MCs through DNA fragmentation and RAPD analysis. Determination of DNA fragmentation by fluorescent dye DAPI showed that significant DNA damage was observed in rice seedlings after exposure to CE while DNA fragmentation in rape seedlings and apple cultures did not differ significantly between treatment and control groups. Qualitative characterization of genomic DNA fragmentation by agarose gel electrophoresis supported the quantitative determination using DAPI. The main changes in RAPD profiles of rape seedlings following exposure of lower doses of CE were variation in band intensity for the primers F03 and S01, while higher doses of CE caused loss of normal bands and appearance of new bands except band intensity changes. The data presented here demonstrate that DNA damage in plants occurs following exposure of microcystins, and the polymorphic RAPDs may be used as an investigation tool for environmental toxicology and as a useful biomarker for the detection of genotoxic effects of microcystins on plants.
Collapse
Affiliation(s)
- J Z Chen
- School of Life Science, Huzhou University, Huzhou 313000, PR China.
| | | | | | | | | | | |
Collapse
|
33
|
Abstract
INTRODUCTION The diagnosis of long segment Hirschsprung's disease (LSHD) is frequently delayed. Our purpose was to: 1) summarize contrast enema (CE) findings in patients with LSHD, and 2) evaluate the utility of CE by comparing LSHD patients managed with/without pre-biopsy CE. METHODS All LSHD cases (transition zone [TZ] proximal to the splenic flexure) treated between 1984 and 2009 were stratified according to whether a pre-biopsy CE was done (Group 1) or not (Group 2). CE were reviewed by a single pediatric radiologist, and the original reports were categorized as "helpful", "inconclusive" or "misleading". Group comparisons included elapsed days from admission to diagnostic rectal biopsy/first operation and initial hospitalization length of stay (LOS). RESULTS 29 patients (16 in Group 1; 13 in Group 2) were identified. CE review revealed TZ in 7/16 (44%); and of these, 6 (86%) underestimated the actual aganglionic segment length. 6/16 (38%) original CE reports were "misleading". Overall, Group 1 patients experienced a significant delay in time to biopsy (p=0.047), first operation (p=0.005), and showed a trend towards prolonged LOS. CONCLUSIONS Pre-biopsy CE offers little to the diagnosis of LSHD and may contribute to diagnosis/treatment delays. Even if a TZ is recognized in biopsy proven HD, the predicted aganglionic segment length should not guide the operative planning.
Collapse
Affiliation(s)
- J Z Chen
- BC Children's Hospital, Pediatric General Surgery, Vancouver, Canada
| | | | | |
Collapse
|
34
|
Ferenczi K, Ohtola J, Aubert P, Kessler M, Sugiyama H, Somani AK, Gilliam AC, Chen JZ, Yeh I, Matsuyama S, McCormick TS, Cooper KD. Malignant T cells in cutaneous T-cell lymphoma lesions contain decreased levels of the antiapoptotic protein Ku70. Br J Dermatol 2010; 163:564-71. [PMID: 20408834 DOI: 10.1111/j.1365-2133.2010.09812.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Malignant T cells in primary cutaneous T-cell lymphoma (CTCL) are genetically unstable and exhibit prolonged lifespans potentially explained by dysregulation of apoptosis, yet are responsive to apoptosis-inducing therapies. The heterodimeric protein Ku70/80 is known to play a role in DNA repair (Ku70 and Ku80) and inhibition of apoptosis (Ku70 only). OBJECTIVES To investigate the expression of Ku70/80 in CD3+ T cells derived from skin and blood in patients with CTCL and normal samples, as well as benign dermatoses. METHODS Normal (n=10), CTCL (n=9) and benign dermatoses (n=13) skin samples were stained for confocal imaging of Ku70/80 and CD3 and analysed using imaging software. Circulating CD4+ T cells in normal and CTCL peripheral blood were analysed by flow cytometry and Western blot for Ku70/80 expression (n=6). RESULTS Ku70 and Ku80 were significantly diminished in T cells of CTCL lesions relative to T cells of control skin. Decreased T-cell Ku70 expression was not a feature of the benign dermatoses psoriasis and contact dermatitis, suggesting that loss of Ku70/80 in CTCL is not simply the result of cutaneous inflammation. Reduced Ku70 was also noted in circulating CD4+ T cells in patients with CTCL with peripheral blood involvement. CONCLUSIONS Deficient expression or lack of Ku70/80 may result in genomic instability and play a role in tumorigenesis, as well as account for the increased susceptibility of malignant T cells to apoptosis-inducing treatment modalities in the setting of intrinsic resistance to apoptosis.
Collapse
Affiliation(s)
- K Ferenczi
- Department of Dermatology, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, OH 44106, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Chen JZ, Lukas B, Dar AR, Bzdusek K, Karnas S, Yartsev S. Sci-Thurs PM: Planning-01: Evaluation of Real-Time Dose-Adaptation Process for Intensity-Modulated Radiation Therapy. Med Phys 2009. [DOI: 10.1118/1.3244172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
36
|
Wang XX, Zhang FR, Zhu JH, Xie XD, Chen JZ. Up-Regulation of CXC Chemokine Receptor 4 Expression in Chronic Atrial Fibrillation Patients with Mitral Valve Disease May Be Attenuated by Renin–Angiotensin System Blockers. J Int Med Res 2009; 37:1145-51. [PMID: 19761697 DOI: 10.1177/147323000903700419] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study characterized CXC chemokine receptor 4 (CXCR4) expression in patients with mitral valve disease and chronic atrial fibrillation (AF). Forty-eight patients with chronic AF formed two groups based on whether they were treated with or without renin–angiotensin system (RAS) blockers (AF + RAS group; n = 25, or AF – RAS group; n = 23). The controls comprised 17 mitral valve disease patients with sinus rhythm (SR group). CXCR4 mRNA and protein levels in the left atria were significantly higher in the AF – RAS and AF + RAS groups than in the SR group. CXCR4 expression was significantly lower in the AF + RAS group than the AF – RAS group. More CD34+ cells expressed CXCR4 in the AF – RAS and AF + RAS groups than in the SR group. Angiotensin II, collagen I and left atrial diameter significantly positively correlated with CXCR4 expression in the AF – RAS group. These results suggest that CXCR4 expression is up-regulated in chronic AF patients with mitral valve disease, is associated with atrial remodelling, and that these effects are attenuated by RAS blockers.
Collapse
Affiliation(s)
- XX Wang
- Department of Cardiology, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - FR Zhang
- Department of Cardiology, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - JH Zhu
- Department of Cardiology, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - XD Xie
- Department of Cardiology, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - JZ Chen
- Department of Cardiology, The First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China
| |
Collapse
|
37
|
Qie YQ, Wang JL, Liu W, Shen H, Chen JZ, Zhu BD, Xu Y, Zhang XL, Wang HH. More vaccine efficacy studies on the recombinant Bacille Calmette-Guerin co-expressing Ag85B, Mpt64 and Mtb8.4. Scand J Immunol 2009; 69:342-50. [PMID: 19284499 DOI: 10.1111/j.1365-3083.2009.02231.x] [Citation(s) in RCA: 22] [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: 11/29/2022]
Abstract
The immunogenicity of the recombinant Bacille Calmette-Guerin: rBCG-Ag85B-Mpt64(190-198)-Mtb8.4 (rBCG-AMM) was evaluated in our previous study. This paper compares the protective efficacy of rBCG-AMM, rBCG-A which overexpresses Ag85B and BCG in C57BL/6 mice. There was no significant difference in proliferation characteristics among rBCG-AMM, rBCG-A and BCG. The growth characteristics of rBCG-AMM in host tissue were identical to control BCG, suggesting the improved protective efficacy was directly related to the expression of the Ag85B-Mpt64(190-198)-Mtb8.4 fusion protein. The protective experiment demonstrated that rBCG-AMM could confer similar or even better protective efficacy against Mycobacterium tuberculosis infection compared with BCG or rBCG-A as evaluated by bacterial organ loads, lung histopathology and net weight gain or loss. The results suggested that the recombinant BCG: rBCG-Ag85B-Mpt64(190-198)-Mtb8.4 is a potential vaccine candidate for further study.
Collapse
Affiliation(s)
- Y Q Qie
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Science, Fudan University, Shanghai, China
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Xu ZX, Chen JZ, Yue YB, Zhang JQ, Li ZH, Feng DM, Ruan ZC, Tian L, Xue JL, Wang QJ, Jia W. A 16-bp RBE element mediated Rep-dependent site-specific integration in AAVS1 transgenic mice for expression of hFIX. Gene Ther 2009; 16:589-95. [DOI: 10.1038/gt.2009.9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
39
|
Xia L, Wang XX, Hu XS, Guo XG, Shang YP, Chen HJ, Zeng CL, Zhang FR, Chen JZ. Resveratrol reduces endothelial progenitor cells senescence through augmentation of telomerase activity by Akt-dependent mechanisms. Br J Pharmacol 2008; 155:387-94. [PMID: 18587418 DOI: 10.1038/bjp.2008.272] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Recent studies have shown that resveratrol increased endothelial progenitor cells (EPCs) numbers and functional activity. However, the mechanisms remain to be determined. Previous studies have demonstrated that increased EPC numbers and activity were associated with the inhibition of EPC senescence, which involves activation of telomerase. Therefore, we investigated whether resveratrol inhibits the onset of EPC senescence through telomerase activation, leading to potentiation of cellular activity. EXPERIMENTAL APPROACH After prolonged in vitro cultivation, EPCs were incubated with or without resveratrol. The senescence of EPCs were determined by acidic beta-galactosidase staining. The bromo-deoxyuridine incorporation assay or a modified Boyden chamber assay were employed to assess proliferative or migratory capacity, respectively. To further examine the underlying mechanisms of these effects, we measured telomerase activity and the phosphorylation of Akt by western blotting. KEY RESULTS Resveratrol dose dependently prevented the onset of EPCs senescence and increased the proliferation and migration of EPCs. The effect of resveratrol on senescence could not be abolished by eNOS inhibitor or by an oestrogenic receptor antagonist. Resveratrol significantly increased telomerase activity and Akt phosphorylation. Pre-treatment with the PI3K inhibitor, LY294002, significantly attenuated resveratrol-induced telomerase activity. CONCLUSIONS AND IMPLICATIONS Resveratrol delayed the onset of EPC senescence and this effect was accompanied by activation of telomerase through the PI3K-Akt signalling pathway. The inhibition of EPCs senescence by resveratrol might protect EPCs against dysfunction induced by pathological factors in vivo and improve EPC functional activities in a way that may be important for cell therapy.
Collapse
Affiliation(s)
- L Xia
- Department of Cardiovascular Diseases, the First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Zhu JH, Chen JZ, Wang XX, Xie XD, Sun J, Zhang FR. Homocysteine accelerates senescence and reduces proliferation of endothelial progenitor cells. J Mol Cell Cardiol 2006; 40:648-52. [PMID: 16600290 DOI: 10.1016/j.yjmcc.2006.01.011] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2005] [Revised: 01/01/2006] [Accepted: 01/12/2006] [Indexed: 12/13/2022]
Abstract
Our previous studies showed that homocysteine (Hcy) reduces endothelial progenitor cell (EPC) numbers and impairs functional activity. However, the mechanisms by which Hcy reduces EPCs numbers and activity remain to be determined. Recent studies have demonstrated that reduced EPCs numbers and activity was associated with EPCs senescence which involved telomerase activity. Therefore, we investigated whether Hcy accelerates the onset of EPCs senescence through telomerase inactivation, leading to cellular dysfunction. EPCs were isolated from peripheral blood and characterized. After ex vivo cultivation, EPCs became senescent as determined by acidic beta-galactosidase staining. Hcy dose-dependently accelerated the onset of EPCs senescence in culture. Moreover, Hcy decreased proliferation of EPCs as assessed by BrdU incorporation assay and colony-forming capacity. To get further insights into the underlying mechanisms of these effects induced by Hcy, we measured telomerase activity and determined the phosphorylation of Akt by using western blot. Hcy significantly diminished telomerase activity and Akt phosphorylation. Taken together, the results of the present study demonstrated that Hcy accelerated the onset of EPCs senescence, leading to cellular dysfunction. The effect of Hcy might be dependent on telomerase inactivation, and Akt dephosphorylation also appeared to play a major role. In addition, atorvastatin had a preventative effect against Hcy-induced EPCs senescence.
Collapse
Affiliation(s)
- J H Zhu
- Department of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | | | | | | | | | | |
Collapse
|
41
|
Abstract
The aim of this investigation is to determine whether rapamycin treatment has any effect on endothelial progenitor cells (EPCs). Total mononuclear cells (MNCs) were isolated from peripheral blood by Ficoll density gradient centrifugation, and then the cells were plated on fibronectin-coated culture dishes. After 7 days in culture, attached cells were stimulated with rapamycin (in a series of final concentrations: 0.1, 1.0, 2.0 and 5.0 g/ml) for 6, 12, 24 and 48 h. EPCs were characterized as adherent cells, double positive for DiLDL uptake and lectin binding by direct fluorescence staining. EPC proliferation and migration were determined using the MTT assay and a modified version of the Boyden chamber assay, respectively. An EPC adhesion assay was performed by replating the cells on fibronectin-coated dishes; adherent cells were then counted. Tube formation activity was assayed by using a tube formation assay kit and endothelial nitric oxide synthase (eNOS) was assayed by Western blot analysis. Incubation of isolated human MNCs with rapamycin decreased the number of EPCs present; rapamycin also decreased EPCs proliferative, migratory, adhesive, tube formation capacity and eNOS production in a concentration- and time-dependent manner. Rapamycin was found to decrease the number, proliferative, migratory, adhesive and tube formation capacities of the EPCs, and also was found to decreases eNOS in the EPCs.
Collapse
Affiliation(s)
- T-G Chen
- Department of Cardiovascular Disease, First Affiliated Hospital, Medical School of Zhejiang University, Hangzhou, China
| | | | | |
Collapse
|
42
|
Goldman SP, Chen JZ, Battista JJ. Feasibility of a fast inverse dose optimization algorithm for IMRT via matrix inversion without negative beamlet intensities. Med Phys 2005; 32:3007-16. [PMID: 16266115 DOI: 10.1118/1.2030427] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
A fast optimization algorithm is very important for inverse planning of intensity modulated radiation therapy (IMRT), and for adaptive radiotherapy of the future. Conventional numerical search algorithms such as the conjugate gradient search, with positive beam weight constraints, generally require numerous iterations and may produce suboptimal dose results due to trapping in local minima. A direct solution of the inverse problem using conventional quadratic objective functions without positive beam constraints is more efficient but will result in unrealistic negative beam weights. We present here a direct solution of the inverse problem that does not yield unphysical negative beam weights. The objective function for the optimization of a large number of beamlets is reformulated such that the optimization problem is reduced to a linear set of equations. The optimal set of intensities is found through a matrix inversion, and negative beamlet intensities are avoided without the need for externally imposed ad-hoc constraints. The method has been demonstrated with a test phantom and a few clinical radiotherapy cases, using primary dose calculations. We achieve highly conformal primary dose distributions with very rapid optimization times. Typical optimization times for a single anatomical slice (two dimensional) (head and neck) using a LAPACK matrix inversion routine in a single processor desktop computer, are: 0.03 s for 500 beamlets; 0.28 s for 1000 beamlets; 3.1 s for 2000 beamlets; and 12 s for 3000 beamlets. Clinical implementation will require the additional time of a one-time precomputation of scattered radiation for all beamlets, but will not impact the optimization speed. In conclusion, the new method provides a fast and robust technique to find a global minimum that yields excellent results for the inverse planning of IMRT.
Collapse
Affiliation(s)
- S P Goldman
- Department of Physics & Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada.
| | | | | |
Collapse
|
43
|
Abstract
In the present study, we examined the effect of interleukin-2 (IL-2) on cardiomyocyte Ca(2+) handling. The effects of steady-state and transient changes in stimulation frequency on the intracellular Ca(2+) transient were investigated in isolated ventricular myocytes by spectrofluorometry. In the steady state (0.2 Hz) IL-2 (200 U/ml) decreased the amplitude of Ca(2+) transients induced by electrical stimulation and caffeine. At 1.25 mM extracellular Ca(2+) concentration ([Ca(2+)](o)), when the stimulation frequency increased from 0.2 to 1.0 Hz, diastolic Ca(2+) level and peak intracellular Ca(2+) concentration ([Ca(2+)](i)), as well as the amplitude of the transient, increased. The positive frequency relationships of the peak and amplitude of [Ca(2+)](i) transients were blunted in the IL-2-treated myocytes. The effect of IL-2 on the electrically induced [Ca(2+)](i) transient was not normalized by increasing [Ca(2+)](o) to 2.5 mM. IL-2 inhibited the frequency relationship of caffeine-induced Ca(2+) release. Blockade of sarcoplasmic reticulum (SR) Ca(2+)-ATPase with thapsigargin resulted in a significant reduction of the amplitude-frequency relationship of the transient similar to that induced by IL-2. The restitutions were not different between control and IL-2 groups at 1.25 mM [Ca(2+)](o), which was slowed in IL-2-treated myocytes when [Ca(2+)](o) was increased to 2.5 mM. There was no difference in the recirculation fraction (RF) between control and IL-2-treated myocytes at both 1.25 and 2.5 mM [Ca(2+)](o). The effects of IL-2 on frequency relationship, restitution, and RF may be due to depressed SR functions and an increased Na(+)-Ca(2+) exchange activity, but not to any change in L-type Ca(2+) channels.
Collapse
Affiliation(s)
- C M Cao
- Department of Physiology, Zhejiang University School of Medicine, 353 Yan'an Road, Hangzhou 310031, China
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Darhuber AA, Chen JZ, Davis JM, Troian SM. A study of mixing in thermocapillary flows on micropatterned surfaces. Philos Trans A Math Phys Eng Sci 2004; 362:1037-1058. [PMID: 15306483 DOI: 10.1098/rsta.2003.1361] [Citation(s) in RCA: 7] [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: 05/24/2023]
Abstract
The recent introduction of actuation mechanisms for microfluidic transport based on free surface flows raises a number of interesting questions involving efficient mixing configurations, especially in systems with small aspect ratios. This work investigates the characteristics of convective and diffusive mixing in continuous-mode streaming of thermocapillary microflows on chemically micropatterned surfaces. Mixing times and mixing lengths relevant to chemical microreactors or gas sensors are investigated for various geometries and parameter ranges. Scaling arguments and full numerical solutions are presented to extract optimal operating conditions. Confocal fluorescence microscopy measurements of the interfacial diffusive broadening in adjacent flowing streams confirm numerical predictions. Three important mixing regimes, based on analogues of purely diffusive dynamics, Rhines-Young shear-augmented diffusion and Taylor-Aris dispersion are identified and investigated for use in free surface flows with large surface-to-volume ratios.
Collapse
Affiliation(s)
- A A Darhuber
- Microfluidic Research and Engineering Laboratory, Department of Chemical Engineering, Princeton University, Princeton, NJ 08544, USA.
| | | | | | | |
Collapse
|
45
|
Bauman G, Gete E, Chen JZ, Wong E. Simplified intensity-modulated arc therapy for dose escalated prostate cancer radiotherapy. Med Dosim 2004; 29:18-25. [PMID: 15023389 DOI: 10.1016/j.meddos.2003.09.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2003] [Accepted: 09/20/2003] [Indexed: 11/25/2022]
Abstract
Simplified intensity-modulated arc therapy (SIMAT) employs forward planned, conformal, and avoidance arc combinations with dynamic multileaf collimation (MLC) as a simpler alternative to other forms of intensity-modulated radiotherapy (IMRT). In this work, we compare SIMAT with 4-field (4F) and 6-field (6F) 3D conformal radiation therapy (CRT) for prostate cancer treatment. Prostate, seminal vesicle, bladder, and rectum were contoured on the CT images of 10 patients being planned for radiotherapy. Two planning target volumes (PTV) were defined: PTV1 (prostate + seminal vesicles + 1.0-cm margin) and PTV2 (prostate + 1.0-cm margin). SIMAT, 4F, and 6F plans were generated with a prescription dose of 78 Gy to prostate and 54 Gy to the seminal vesicles. Differences in the 3 techniques in terms of target and rectal coverage were compared. In addition, dose distributions of the SIMAT plans were verified with measurements in a phantom. Mean dose to PTV2 (4F, 76 Gy; 6F, 78 Gy; SIMAT, 76 Gy) and the dose delivered to 95% of the target volume (D(95)) were similar between the 3-techniques. Target conformity was better with SIMAT. Mean dose and calculated NTCP for the rectum were lower for SIMAT than those for 4F and 6F plans (4F 55.6 Gy vs. 6F 49.0 Gy vs. SIMAT 42.7 Gy). Mean dose to femoral heads was lower for the 4F technique vs. 6F and SIMAT techniques (4F 44.5 Gy vs. 6F 48.9 Gy vs. SIMAT 49.5 Gy). In-phantom measurement demonstrated good agreement between the plans and SIMAT treatments delivered in phantom. We concluded that SIMAT demonstrates advantages over 4F and 6F in terms of target conformity mean rectal dose and NTCP with good reproducibility in phantom. On the basis of this analysis, we have commenced a clinical pilot study of SIMAT for prostate cancer radiotherapy.
Collapse
Affiliation(s)
- G Bauman
- Departments of Radiation Oncology, London Regional Cancer Centre and the University of Western Ontario, London, Ontario, Canada.
| | | | | | | |
Collapse
|
46
|
Chen JZ, Zhu JH, Wang XX, Zhu JH, Xie XD, Sun J, Shang YP, Guo XG, Dai HM, Hu SJ. Effects of homocysteine on number and activity of endothelial progenitor cells from peripheral blood. J Mol Cell Cardiol 2004; 36:233-9. [PMID: 14871551 DOI: 10.1016/j.yjmcc.2003.10.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2003] [Revised: 09/23/2003] [Accepted: 10/14/2003] [Indexed: 10/26/2022]
Abstract
The aim of this study is to investigate whether homocysteine (Hcy) has influences on endothelial progenitor cells (EPCs) number and activity. Total mononuclear cells (MNCs) were isolated from peripheral blood by Ficoll density gradient centrifugation, and then the cells were plated on fibronectin-coated culture dishes. After 7 d cultured, attached cells were stimulated with Hcy (to make a series of final concentrations: 10, 50, 100 and 200 micromol/l) or vehicle control for the respective time points (6, 12, 24 and 48 h). EPCs were characterized as adherent cells double positive for DiLDL uptake and lectin binding by direct fluorescent staining under a laser scanning confocal microscope. EPCs proliferation, migration and in vitro vasculogenesis activity were assayed with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, modified Boyden chamber assay and in vitro vasculogenesis kit, respectively. EPCs adhesion assay was performed by replating those on fibronectin-coated dishes, and then adherent cells were counted. Incubation of isolated human MNCs with Hcy dose and time dependently decreased the number of EPCs, maximum at 200 micromol/l, 24 h (approximately 50% reduction, P < 0.01). In addition, Hcy dose and time dependently impaired EPC proliferative, migratory, adhesive and in vitro vasculogenesis capacity. In conclusion, hyperHcy may induce the reduction of EPCs with decreased functional activity.
Collapse
Affiliation(s)
- J Z Chen
- Department of Cardiovascular Diseases, First Affiliated Hospital, Medical School of Zhejiang University, No. 79 Qingchun Road, Hangzhou 310003, Zhejiang Province, PR China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Abstract
We examine a minimal model for helix-forming polymers. The monomer-monomer potential energy is based on the anisotropic potentials seen in proteins and is used in conjunction with a wormlike backbone. We show that the coil-helix transition involves four states. As the temperature is lowered, the first observed state is a coil state, the second a collapsed globular, the third a highly flexible helical state, and the fourth a crystalline helical state. We discuss in detail what effect the potential energy form has on these various states by systematically varying the potential from strongly anisotropic to isotropic. The data demonstrate that the foldability of a helix is strongly related to anisotropic nature of the potential. In the isotropic case, we show that the transition following a globular collapse is not first order as postulated for these systems. In the strongly anisotropic case the globular-helix transition is consistent with cooperative first-order-like behavior.
Collapse
Affiliation(s)
- J P Kemp
- Guelph-Waterloo Physics Institute, Department of Physics, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1
| | | |
Collapse
|
48
|
Leung KW, Liaw YC, Chan SC, Lo HY, Musayev FN, Chen JZ, Fang HJ, Chen HM. Significance of local electrostatic interactions in staphylococcal nuclease studied by site-directed mutagenesis. J Biol Chem 2001; 276:46039-45. [PMID: 11598114 DOI: 10.1074/jbc.m106620200] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In this paper, we show that amino acids Glu(73) and Asp(77) of staphylococcal nuclease cooperate unequally with Glu(75) to stabilize its structure located between the C-terminal helix and beta-barrel of the protein. Amino acid substitutions E73G and D77G cause losses of the catalytic efficiency of 24 and 16% and cause thermal stability losses of 22 and 26%, respectively, in comparison with the wild type (WT) protein. However, these changes do not significantly change global and local secondary structures, based on measurements of fluorescence and CD(222 nm). Furthermore, x-ray diffraction analysis of the E75G protein shows that the overall structure of mutant and WT proteins is similar. However, this mutation does cause a loss of essential hydrogen bonding and charge interactions between Glu(75) and Lys(9), Tyr(93), and His(121). In experiments using double point mutations, E73G/D77G, E73G/E75G, and E75G/D77G, significant changes are seen in all mutants in comparison with WT protein as measured by fluorescence and CD spectroscopy. The losses of thermal stability are 47, 59, and 58%, for E73G/D77G, E73G/E75G, and E75G/D77G, respectively. The triple mutant, E73G/E75G/D77G, results in fluorescence intensity and CD(222 nm) close to those of the denatured state and in a thermal stability loss of 65% relative to the WT protein. Based on these results, we propose a model in which significant electrostatic interactions result in the formation of a locally stable structure in staphylococcal nuclease.
Collapse
Affiliation(s)
- K W Leung
- Department of Biochemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Guo QL, Liang BL, Wei YH, Chen JZ. [Study of the reproducibility and sensitivity of laser microspectral analysis in argon atmosphere at reduced pressure]. Guang Pu Xue Yu Guang Pu Fen Xi 2001; 21:641-643. [PMID: 12945318] [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: 05/24/2023]
Abstract
In argon atmosphere at reduced pressure, the spectral analysis reproducibility and sensitivity are experimentally studied with the laser microprobe emission spectral analysis(LMESA) system for the metal alloy standard samples. For the atomic spectral analysis line, the relative standard deviation(RSD) in argon atmosphere at reduced pressure is better than that in air atmosphere. For the ionic spectral analysis line, the RSD is almost the same in both cases. The RSD is strongly affected by the composition of the sample and the concentration of elements. The measured slope of calibration curves for the determination of Cu, Zn and Mg in an aluminum alloy in argon atmosphere is about 1.5-2 times of that in the air atmosphere, which indicates an obvious improvement of the sensitivity and is helpful to expand the dynamic range of the spectral analysis.
Collapse
Affiliation(s)
- Q L Guo
- Department of Physics, Hebei University, Baoding 071002, China
| | | | | | | |
Collapse
|
50
|
Abstract
A two-source model for the calculation of relative output factors (ROF) for clinical applications of electron beams has been developed. The model consists of (1) an effective extended source above the final field-defining aperture (cutout) plane and (2) a source due to scattering from the aperture. Calculations are based on Fermi-Eyges theory and a pencil beam algorithm with parameters determined independently for each major scattering component. The model predicts a modified inverse square law for determining the dose rate for the electron beams. It also generalizes the "square-root method" and "one-dimensional method" that are often used clinically for ROF calculations. A computer program based on the model has been developed to calculate ROF for irregular fields. The predictions of ROF values have been compared with measurements on a Varian CLINAC 2100C/D accelerator for different cutout size, energies, applicators, and SSDs for square fields, rectangular fields, circular fields, and irregular fields. The agreement between prediction and measurement of the ROF for these wide range of conditions is generally within 1% for energies from 6 to 20 MeV. This two-source model can be used for clinical applications and it requires a minimal set of measured input data.
Collapse
Affiliation(s)
- J Z Chen
- Department of Oncology, University of Western Ontario and London Regional Cancer Center, Canada.
| | | | | | | |
Collapse
|