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Yang D, Tan L, Wu Q, Tang A, Li Z. The impact of environmental regulation on renewable energy development in China from the perspective of spatial effects. Environ Sci Pollut Res Int 2024; 31:10234-10249. [PMID: 37831259 DOI: 10.1007/s11356-023-30237-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 09/29/2023] [Indexed: 10/14/2023]
Abstract
From a spatial perspective, this paper constructs a spatial Durbin model based on the adjacent weight matrix to analyze the impact of environmental regulation on the development of renewable energy in 30 provinces (autonomous regions and municipalities directly under the Central Government) in China from 2007 to 2020. The results show that (1) both environmental regulation and renewable energy development have positive spatial autocorrelation and form relatively similar spatial agglomeration areas, specifically showing the characteristics of "high-high" agglomeration in resource-rich areas and "low-low" agglomeration in resource-scarce areas. (2) Environmental regulation significantly promotes the development of local renewable energy and has a significant spatial spillover effect on the development of renewable energy in neighboring provinces. (3) The moderating effect results show that renewable energy installed capacity and electricity demand play an inverse moderating role between environmental regulation and renewable energy development. (4) From the perspective of different regions, the impact of environmental regulation on the development of renewable energy is heterogeneous. Based on the research conclusions, this paper finally provides corresponding policy suggestions from three aspects: regional cooperation, technical support, and differentiation.
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Affiliation(s)
- DongXiao Yang
- School of Economy & Trade, Hunan University of Technology and Business, Changsha, 410205, China
| | - Lin Tan
- School of Economy & Trade, Hunan University of Technology and Business, Changsha, 410205, China.
| | - QianGe Wu
- School of Economy & Trade, Hunan University of Technology and Business, Changsha, 410205, China
| | - AnYan Tang
- School of Economy & Trade, Hunan University of Technology and Business, Changsha, 410205, China
| | - ZhengYong Li
- School of Economy & Trade, Hunan University of Technology and Business, Changsha, 410205, China
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Sasse A, Saeed NA, Oh P, Housri N, Knowlton CA, Hayman TJ, Peters GW, Campbell AM, Yang DX, Park HSM. Dose-Escalated vs. Conventional Hypofractionated Radiotherapy for Lung Cancer Patients in Predominantly Central Locations. Int J Radiat Oncol Biol Phys 2023; 117:e55. [PMID: 37785692 DOI: 10.1016/j.ijrobp.2023.06.768] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Hypofractionated radiation therapy (HFRT) is an increasingly utilized treatment option for patients with lung cancers unamenable to stereotactic body radiotherapy (SBRT). Conventional HFRT (C-HFRT) is often prescribed to 60 Gy in 15 fractions, which has a lower biologically effective dose (BED10 of 84.0) than SBRT. We compared outcomes of patients treated with a dose-escalated HFRT regimen (DE-HFRT, 72 Gy in 18 fractions, BED10 of 100.8) to those treated with C-HFRT. We aimed to evaluate local control (LC), overall survival (OS), and grade 3+ toxicity between patients who received C-HFRT vs. DE-HFRT as we hypothesized DE-HFRT may be superior/equivalent to C-HFRT. MATERIALS/METHODS A database was created of all patients at our institution who received either thoracic C-HFRT or DE-HFRT between 2013 and 2020. Baseline variables were compared by chi-square analysis and logistic regression. We analyzed the association between treatment regimens with LC and OS (log-rank test and Cox proportional hazards regression), as well as grade 3+ toxicity. RESULTS A total of 107 patients were included, among whom 55 (51.4%) received C-HFRT and 52 (48.6%) received DE-HFRT. Median age was 73, 88.8% of patients had non-small cell lung cancer, 81.3% received lung-only treatment, and 52.3% had an ultra-central tumor location (within 1 cm of proximal tracheobronchial tree, esophagus, or heart). Patients with DE-HFRT were more likely to have lung-only treatment (92.3% vs. 70.9%, p = 0.005) and stage I disease (47.1% vs 24.1%, p = 0.01) than those with C-HFRT, but had a similar proportion of ultra-central tumors (57.1% vs. 54.9%, p = 0.82). Patients with DE-HFRT had a non-statistically significant trend towards higher LC (2-year 81.0% vs. 72.3%, 3-year 77.3% vs 52.3%, HR 0.53 [95% CI 0.26-1.09], p = 0.09) and OS (2-year 61.3% vs. 44.8%, 3-year 44.9% vs 33.9%, HR 0.68 [95% CI 0.41-1.11], p = 0.13) compared to those with C-HFRT. Similar findings were noted among those with lung-only treatment. Among those with ultra-central tumors, patients with DE-HFRT had statistically significantly higher LC (2-year 86.6% vs 71.2%, 3-year 86.6% vs 42.2%, HR 0.26 [95% CI 0.08-0.84] p = 0.02) and a non-statistically significant trend towards higher OS (2-year 63.8% vs 40.0%, 3-year 46.2% vs 31.1% HR 0.55 [95% CI 0.28-1.09] p = 0.09) compared to those with C-HFRT. There was no statistically significant difference in grade 3+ toxicities between DE-HFRT and C-HFRT (15.4% vs. 10.9%, OR 1.48 [95% CI 0.47-4.61], p = 0.49). CONCLUSION We noted promising local control and overall survival for patients treated with 72 Gy in 18 fractions compared to 60 Gy in 15 fractions, especially among those with ultra-central tumors. Grade 3+ toxicities were not significantly higher for patients undergoing dose escalation. Hence, our findings suggest that DE-HFRT to the lung is a safe and effective treatment regimen for highly selected patients who cannot undergo SBRT.
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Affiliation(s)
- A Sasse
- Yale School of Medicine, New Haven, CT
| | - N A Saeed
- Yale University School of Medicine, New Haven, CT
| | - P Oh
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
| | - N Housri
- Veterans Affairs, East Orange, NJ
| | | | - T J Hayman
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
| | - G W Peters
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
| | - A M Campbell
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
| | - D X Yang
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
| | - H S M Park
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
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Abstract
Immunotherapy has become the breakthrough strategies for treatment of cancer in recent years. The application of messenger RNA in cancer immunotherapy is gaining tremendous popularity as mRNA can function as an effective vector for the delivery of therapeutic antibodies on immune targets. The high efficacy, decreased toxicity, rapid manufacturing and safe administration of mRNA vaccines have great advantages over conventional vaccines. The unprecedent success of mRNA vaccines against infection has proved its effectiveness. However, the instability and inefficient delivery of mRNA has cast a shadow on the wide application of this approach. In the past decades, modifications on mRNA structure and delivery methods have been made to solve these questions. This review summarizes recent advancements of mRNA vaccines in cancer immunotherapy and the existing challenges for its clinical application, providing insights on the future optimization of mRNA vaccines for the successful treatment of cancer.
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Affiliation(s)
- Li-Juan Duan
- Medical School, Huanghe Science and Technology College, Zhengzhou, China
| | - Qian Wang
- Reproductive Medicine Center, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou, China
| | - Cuilian Zhang
- Reproductive Medicine Center, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou, China
| | - Dong-Xiao Yang
- Medical School, Huanghe Science and Technology College, Zhengzhou, China
| | - Xu-Yao Zhang
- Medical School, Huanghe Science and Technology College, Zhengzhou, China
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Liu B, Wang P, Yang DX, Xiong WN, Zhou M, Qu JM, Feng Y, Guo Y. [Development of multiple organ dysfunction syndrome in patients with Coronavirus Disease 2019: clinical characteristics and risk factors]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:435-442. [PMID: 34865363 DOI: 10.3760/cma.j.cn112147-20200605-00675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Objective: To explore the clinical characteristics and risk factors of patients with Coronavirus Disease 2019 (COVID-19) when developing multiple organ dysfunction syndrome (MODS). Methods: Data from 458 inpatients of confirmed COVID-19 in Wuhan, Shanghai and Tongling from December 29, 2019 to March 24, 2020 were retrospectively collected. COVID-19 was confirmed by real-time RT-PCR of throat swab samples. Data of demographics, clinical presentation, laboratory tests, imaging findings, treatment and prognosis were obtained from medical record and compared between COVID-19 patients with and without MODS. Risk factors for the development of MODS were analyzed by univariate and multivariate logistic regression analysis. Results: Of the 458 COVID-19 patients (266 from Wuhan, 208 from Shanghai, and 24 from Tongling), 103 developed transient or persistent MODS in the course. More male patients were found in those with MODS (72.8% vs 54.6%, P=0.001). And MODS patients were of older age (72.8% vs 54.6%, P=0.001), more chronic comorbidities (68.0% vs 43.4%, P<0.001), and longer onset-to-admission interval (9.0 vs 7.0 d, P<0.001). In addition, patients with MODS had more expectoration (45.6% vs 29.9%, P=0.003) and shortness of breath (52.4% vs 19.4%, P<0.001), dysfunction of various systems, decreased cellular immunity and elevated IL-6 (9.6 vs 7.6 g/L, P=0.015) in laboratory tests, isolation of other pathogens (18.4% vs 5.6%, P<0.001), and infiltration of all five lobes (75.3% vs 57.6%, P=0.003). During hospitalization, patients with MODS needed a higher proportion of comprehensive treatment and reached a mortality rate of 66.0%. Independents risk factors for development of MODS in COVID-19 patients were: onset-to-admission interval>7 days (OR=2.17, 95%CI: 1.11-4.22, P=0.023), shortness of breath (OR=3.19, 95%CI: 1.60-6.37, P=0.001), lymphocyte count<1×109/L (OR=2.67, 95%CI: 1.31-5.46, P=0.007), blood urea nitrogen>7mol/L (OR=6.27, 95%CI: 2.80-14.08, P<0.001), procalcitonin>0.1 ng/mL (OR=2.48, 95%CI: 1.20-5.13, P=0.014), and C-reactive protein>10 mg/L (OR=3.92, 95%CI: 1.41-10.89, P=0.009). Conclusions: COVID-19 patients with MODS were of higher severity and mortality. Early identification of high-risk groups with MODS according to risk factors may be helpful for early treatment.
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Affiliation(s)
- B Liu
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
| | - P Wang
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
| | - D X Yang
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
| | - W N Xiong
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
| | - M Zhou
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
| | - J M Qu
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
| | - Y Feng
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
| | - Y Guo
- Department of Respiratory and Critical Care Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine; Institute of Respiratory Diseases, Shanghai Jiaotong University School of Medicine,Shanghai 200025,China
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Liu R, Li Y, Yang DX, Xu M, Yan YX, Zhou FG, Liu YM, Xu C, Zhao K, Jiang GY, Liu MW. Serum metabolic markers and metabolic pathways in rats with metabolomic cecal ligation and puncture-induced sepsis. J BIOL REG HOMEOS AG 2021; 34:2069-2077. [PMID: 33325212 DOI: 10.23812/20-525-a] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The aim of this study was to explore the dynamic changes in characteristic serum metabolic markers and pathways during early sepsis in rats. By using cecal ligation and puncture (CLP), we made rat models of sepsis, which were randomly divided into 5 groups with 10 rats in each group: group A, group B, group C, group D, and group E. We collected 2 mL of arterial blood at 0, 6, 12, 24, and 48 hours from rats in group A-E respectively and isolated serum via centrifugation. Next, adopting metabolomics analysis methods, we screened for metabolites from the animal serum with statistically and biologically significant abundance changes, and used the KEGG database to analyze the respective metabolic pathways. In all, our findings reveal that D-glucosamine 6-phosphate, D-glucosamine phosphate, α-D-glucosamine 1-phosphate, D-glucosamine 1-phosphate, and 5-hydroxy isocyanate decline continuously from 12 hours, while L-phenylalanine, (S) -α-amino-β-phenylpropionic acid, 5-methoxy indole acetic acid salt, 5-methoxy indole acetic acid, goose deoxyglycolic acid salt, goose deoxyglycolic acid, and Chen's deoxygenated sugar alcohol started to decrease from 6 hours. Additionally, 3.2,3-Bis-O-(geranyl geranyl)-sn-glycerol- 1-phosphoric acid-L-serine levels rose continuously from 12 hours. We found 13 differentially regulated ions, primarily ones involved in pathways responsible for the metabolism of sugar, amino acids, and lipids, which are related to the disorder of energy metabolism. Our findings mark serum-derived D-glucosamine and its phosphorous derivatives as characteristic metabolic markers of sepsis in rats.
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Affiliation(s)
- R Liu
- ICU, The First Hospital Affiliated To Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Y Li
- Oral Medicine Center, The First People's Hospital of Yunnan Province, Kunming, Yunnan, P.R. China
| | - D X Yang
- Department of Emergency Medicine, The First People's Hospital of Yunnan Province, Kunming, Yunnan, P.R. China
| | - M Xu
- SICU, The Fuwai Cardiovascular Disease Hospital of Yunnan province, Kunming, Yunnan, P.R. China
| | - Y X Yan
- ICU, The Shenzhen Bao'an Hospital Affiliated To Southern Medical University, Shenzhen, Guangdong, P.R. China
| | - F G Zhou
- Department of Emergency Medicine, The First People's Hospital of Yunnan Province, Kunming, Yunnan, P.R. China
| | - Y M Liu
- Department of Gerontology, The People's Hospital of Chongqing, Chongqing, P.R. China
| | - C Xu
- ICU, The First Hospital Affiliated To Kunming Medical University, Kunming, Yunnan, P.R. China
| | - K Zhao
- ICU, The First Hospital Affiliated To Kunming Medical University, Kunming, Yunnan, P.R. China
| | - G Y Jiang
- ICU, The First Hospital Affiliated To Kunming Medical University, Kunming, Yunnan, P.R. China
| | - M W Liu
- Department of Emergency Medicine, The First Hospital Affiliated To Kunming Medical University, Kunming, Yunnan, P.R. China
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Wang SQ, Wang C, Chang LM, Zhou KR, Wang JW, Ke Y, Yang DX, Shi HG, Wang R, Shi XL, Ma LY, Liu HM. Geridonin and paclitaxel act synergistically to inhibit the proliferation of gastric cancer cells through ROS-mediated regulation of the PTEN/PI3K/Akt pathway. Oncotarget 2018; 7:72990-73002. [PMID: 27659528 PMCID: PMC5341958 DOI: 10.18632/oncotarget.12166] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 09/02/2016] [Indexed: 01/05/2023] Open
Abstract
Paclitaxel, a taxane, is a cytotoxic chemotherapeutic agent that targets microtubules. It has become a front-line therapy for a broad range of malignancies, including lung, breast, gastric, esophageal, and bladder carcinomas. Although paclitaxel can inhibit tumor development and improve survival, poor solubility, myelotoxicity, allergic reactions, and drug resistance have restricted its clinical application. Paclitaxel is frequently combined with other chemotherapeutics to enhance the antitumor effects and reduce side effects. We synthesized geridonin, a derivative of oridonin, and demonstrate that geridonin and paclitaxel act synergistically to inhibit the growth of gastric cancer cells. Importantly, geridonin enhanced the antitumor effects of paclitaxel without increasing toxicity in vivo. Mechanistic analysis revealed that administration of geridonin in combination with paclitaxel up-regulated the tumor suppressor PTEN and inhibited phosphorylation of Akt and MDM2. This led to the accumulation of p53 and induced apoptosis though the mitochondrial pathway. Thus, geridonin in combination with paclitaxel is a new treatment strategy for gastric cancer.
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Affiliation(s)
- Sai-Qi Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Cong Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Li-Ming Chang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Kai-Rui Zhou
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Jun-Wei Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Yu Ke
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Dong-Xiao Yang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Hong-Ge Shi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Ran Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Xiao-Li Shi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Li-Ying Ma
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Hong-Min Liu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, P.R. China
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Wang SQ, Wang C, Wang JW, Yang DX, Wang R, Wang CJ, Li HJ, Shi HG, Ke Y, Liu HM. Geridonin, a novel derivative of oridonin, inhibits proliferation of MGC 803 cells both in vitro and in vivo through elevating the intracellular ROS. J Pharm Pharmacol 2016; 69:213-221. [DOI: 10.1111/jphp.12678] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 11/12/2016] [Indexed: 12/27/2022]
Abstract
Abstract
Objectives
To study the antitumour activity of a novel derivative of oridonin named geridonin in vitro and in vivo.
Methods
MTT and colony formation assay were used to test the cytotoxicity of geridonin; apoptosis, cell cycle arrest and the levels of reactive oxygen species were measured by flow cytometry; JC-1 staining assay was used to examine the mitochondrial membrane potential; the MGC 803 xenograft model was established to evaluate the antitumour effect of geridonin in vivo; H&E staining was performed for the histological analysis.
Key findings
In vitro, geridonin remarkably inhibited proliferation of gastrointestinal cancer cells including oesophageal, gastric, liver and colon cancers. On oesophageal, gastric cancer cells, geridonin displayed strong cytotoxicity than that of oridonin. In gastric cancer MGC 803 cells, geridonin triggered apoptosis through the mitochondrial pathway depending on caspase. In addition, geridonin sharply reduced the formation of cell colony, increased the intracellular levels of ROS and induced cell cycle arrest at G2/M phase. In vivo, geridonin delayed the growth of MGC 803 xenograft in athymic mice without obvious loss of bodyweight.
Conclusions
The novel derivative of oridonin, geridonin, inhibited the growth of human gastric cancer cells MGC 803 both in vitro and in vivo mainly via triggering apoptosis depending on elevating intracellular level of ROS.
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Affiliation(s)
- Sai-Qi Wang
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Cong Wang
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Jun-Wei Wang
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Dong-Xiao Yang
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Ran Wang
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Chuan-Jin Wang
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Hui-Ju Li
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Hong-Ge Shi
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Yu Ke
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Hong-Min Liu
- Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
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Yu B, Wang SQ, Qi PP, Yang DX, Tang K, Liu HM. Design and synthesis of isatin/triazole conjugates that induce apoptosis and inhibit migration of MGC-803 cells. Eur J Med Chem 2016; 124:350-360. [DOI: 10.1016/j.ejmech.2016.08.065] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 08/25/2016] [Accepted: 08/26/2016] [Indexed: 10/21/2022]
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Li ZH, Yang DX, Geng PF, Zhang J, Wei HM, Hu B, Guo Q, Zhang XH, Guo WG, Zhao B, Yu B, Ma LY, Liu HM. Design, synthesis and biological evaluation of [1,2,3]triazolo[4,5- d ]pyrimidine derivatives possessing a hydrazone moiety as antiproliferative agents. Eur J Med Chem 2016; 124:967-980. [PMID: 27771599 DOI: 10.1016/j.ejmech.2016.10.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 10/08/2016] [Accepted: 10/12/2016] [Indexed: 12/17/2022]
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Zhang XY, Gu YF, Chen T, Yang DX, Wang XX, Jiang BL, Shao KP, Zhao W, Wang C, Wang JW, Zhang QR, Liu HM. Synthesis, in vitro and in vivo anticancer activities of novel 4-substituted 1,2-bis(4-chlorophenyl)-pyrazolidine-3,5-dione derivatives. Med Chem Commun 2015. [DOI: 10.1039/c5md00240k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To develop potent and selective anticancer agents, a series of novel 4-substituted 1,2-bis(4-chlorophenyl)-pyrazolidine-3,5-dione derivatives were designed and synthesized.
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Zhang WJ, Yang DX, Feng LL, Wang F, Wei G, Lu WY. [Modification by wheat germ agglutinin delays the ocular elimination of liposome]. Yao Xue Xue Bao 2014; 49:543-549. [PMID: 24974475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The purpose of this study is to explore the feasibility of wheat germ agglutinin (WGA) modified liposome as a vehicle for ophthalmic administration. Liposome loaded with 5-carboxyfluorescein (FAM) was prepared by lipid film hydration method. WGA was thiolated and then conjugated to the surface of the liposome via polyethylene glycol linker to constitute the WGA-modified and FAM-loaded liposome (WGA-LS/FAM). The amount of thiol groups on each WGA molecule was determined, and the bioactivity of WGA was estimated after it was modified to the surface of liposome. The physical and chemical features of the WGA-modified liposome were characterized and the ocular bioadhesive performance was evaluated in rats. The result showed that each thiolated WGA molecule was conjugated with 1.32 thiol groups. WGA-LS/FAM had a mean size of (97.40 +/- 1.39) nm, with a polydispersity index of 0.23 +/- 0.01. The entrapment efficacy of FAM was about (2.95 +/- 0.21)%, and only 4% of FAM leaked out of the liposome in 24 h. Erythrocyte agglutination test indicated that after modification WGA preserved the binding activity to glycoprotein. The in vivo ocular elimination of WGA-LS/FAM fitted first-order kinetics, and the elimination rate was significantly slower than that of the unmodified liposome, demonstrating WGA-modified liposome is bioadhesive and suitable for ophthalmic administration.
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Zhang D, Yang DX, Yang CX, Zhang GW, Gao HR, Zhai Y, Jiao RS, Zhang Y, Zhang H, Liang Y, Xu MY. Effects of norepinephrine on the electrical activities of pain-related neurons in the rat nucleus accumbens. Pharmacol Rep 2011; 63:417-22. [PMID: 21602596 DOI: 10.1016/s1734-1140(11)70507-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 07/30/2010] [Indexed: 11/28/2022]
Abstract
This study examined the effects of norepinephrine (NE) and phentolamine on the electrical activities of pain-excited neurons (PENs) and pain-inhibited neurons (PINs) in the nucleus accumbens (NAc) of Wistar rats. Trains of electric pulses applied to the right sciatic nerve were used to provide noxious stimulation, and the discharges of PENs and PINs were recorded using a glass microelectrode. Our results revealed that in response to noxious stimulation, NE decreases the evoked discharge frequency of PENs and increases the evoked discharge frequency of PINs in the NAc of healthy rats, whereas phentolamine produced opposite responses. These results demonstrate that NE is involved in the modulation of nociceptive information transmission in the NAc.
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Affiliation(s)
- Duo Zhang
- Laboratory of Neural Electrophysiology, Department of Physiology, Harbin Medical University, 194 Xuefu Road, Nangang District, Harbin, Heilongjiang, 150081, China
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Shi TF, Yang CX, Yang DX, Gao HR, Zhang GW, Zhang D, Jiao RS, Xu MY, Qiao HQ. L-364,718 potentiates electroacupuncture analgesia through cck-a receptor of pain-related neurons in the nucleus parafascicularis. Neurochem Res 2010; 36:129-38. [PMID: 20953702 DOI: 10.1007/s11064-010-0281-5] [Citation(s) in RCA: 5] [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] [Accepted: 09/21/2010] [Indexed: 12/31/2022]
Abstract
Electroacupuncture (EA) has been successfully used to alleviate pain produced by various noxious stimulus. Cholecystokinin-8 (CCK-8) is a neuropeptide involved in the mediation of pain. We have previously shown that CCK-8 could antagonize the analgesic effects of EA on pain-excited neurons (PENs) and pain-inhibited neurons (PINs) in the nucleus parafascicularis (nPf). However, its mechanism of action is not clear. In the present study, we applied behavioral and neuroelectrophysiological methods to determine whether the mechanisms of CCK-8 antagonism to EA analgesia are mediated through the CCK-A receptors of PENs and PINs in the nPf of rats. We found that focusing radiant heat on the tail of rats caused a simultaneous increase in the evoked discharge of PENs or a decrease in the evoked discharge of PINs in the nPf and the tail-flick reflex. This showed that radiant heat could induce pain. EA stimulation at the bilateral ST 36 acupoints in rats for 15 min resulted in an inhibition of the electrical activity of PEN, potentiation of the electrical activity of PIN, and prolongation in tail-flick latency (TFL), i.e. EA stimulation produced an analgesic effect. The analgesic effect of EA was antagonized when CCK-8 was injected into the intracerebral ventricle of rats. The antagonistic effect of CCK-8 on EA analgesia was reversed by an injection of CCK-A receptor antagonist L-364,718 (100 ng/μl) into the nPf of rats. Our results suggest that the pain-related neurons in the nPf have an important role in mediating EA analgesia. L-364,718 potentiates EA analgesia through the CCK-A receptor of PENs and PINs in the nPf.
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Affiliation(s)
- T F Shi
- Department of Surgery of Second Affiliated Hospital, Harbin Medical University, 150081 Harbin, Heilongjiang, People's Republic of China
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14
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Shen HL, Mou TS, Yang DX. [Estimation of spectral reflectance using color scanner]. Guang Pu Xue Yu Guang Pu Fen Xi 2007; 27:2160-2163. [PMID: 18260383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
To obtain accurate and device-independent color, the scanner needs to be characterized. Considering that the behavior of color scanner always deviates from linear reflectance model and that the color distribution of training samples has considerable effect on the color estimation accuracy, a new spectral characterization method is proposed. This method can estimate accurate high-dimensional spectral reflectance from low-dimensional scanner responses, based on limited sample selection and weighted training. Experimental results indicate that the performance of the proposed method is obviously better than that of previous method, in both color difference error and spectral reflectance error.
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Affiliation(s)
- Hui-Liang Shen
- Department of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
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15
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Yang CX, Xu MY, Liu FY, Yang DX, Wang SZ. L-365,260 reversed effect of sincalide against morphine on electrical and mechanical activities of rat duodenum in vitro. Acta Pharmacol Sin 2002; 23:582-6. [PMID: 12100748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
Abstract
AIM To study the antagonism of sincalide (CCK-8) to the effect of morphine and its mechanism. METHODS The electrical and mechanical activities of rat duodenum in vitro were recorded simultaneously. RESULTS Acetylcholine (ACh, 300 nmol/L) increased the spike potential amplitude (SPA) and the number (SPN) of rat duodenum in vitro, followed by an increase of duodenal contraction amplitudes (CA). The SPA, SPN, and CA of duodenum in vitro were not obviously affected by injection of morphine (330 nmol/L), but it could selectively inhibit the potentiation of ACh. After administration of CCK-8 (0.7 nmol/L), the SPA, SPN, and CA of duodenal segment did not exhibit obvious changes. But CCK-8 could selectively antagonize the effects of morphine, ie, the SPA and SPN were increased again, followed by an increase of CA. CCK-B receptor antagonist L-365,260 (30 nmol/L) reversed the antagonism of CCK-8 to the effect of morphine. CONCLUSION CCK-8 could selectively antagonize the effect of morphine which inhibited the potentiation of ACh on duodenal activities in vitro. The antagonistic effect of CCK-8 on morphine was mainly mediated by CCK-B receptor.
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Affiliation(s)
- Chun-Xiao Yang
- Department of Neurology of 2nd Affiliated Hospital, Harbin Medical University, Harbin 150086, China
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16
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Chi H, Tao XM, Yang DX, Chen KS. Simultaneous measurement of axial strain, temperature, and transverse load by a superstructure fiber grating. Opt Lett 2001; 26:1949-51. [PMID: 18059741 DOI: 10.1364/ol.26.001949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A novel and simple fiber-optic sensor based on a superstructure fiber grating for simultaneous measurement of temperature, axial strain, and transverse load is proposed and demonstrated. By measurement of the shift and split of broadband and narrow-band loss peaks, one can determine the temperature, axial strain, and transverse load simultaneously over the ranges 0-140 degrees , 0-1200muepsilon, and 0-0.3 kg/mm, respectively.
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Abstract
Rapid epithelial repair (restitution) after injury is required to maintain barrier function of the gastrointestinal mucosa and skin and is thought to be a highly ATP-dependent process that would be inhibited under hypoxic conditions. However, little is known about the metabolic pathways required for restitution. Thus, this study was undertaken to evaluate, in vitro, the role of oxidative respiration and glycolysis in restitution after injury. To this end, restitution of the bullfrog gastric mucosa was evaluated under the following conditions: 1) blockade of mitochondrial respiration; 2) blockade of glycolysis; or 3) absence of glucose. The extent of mucosal repair after injury was evaluated by electrophysiology and morphology. Cell migration, repolarization, and the formation of tight junctions after injury occurred during blockade of mitochondrial respiration, whereas the recovery of mucosal barrier function did not. In contrast, glycolytic inhibition completely blocked all aspects of restitution by inhibiting the migration of surface epithelial cells. Restitution occurred in tissues incubated with glucose-free solutions, suggesting that cells contain sufficient glucose (glycogen) to drive glycolysis for many hours. Our results demonstrate that the glycolytic pathway is essential for restitution after injury in the bullfrog gastric mucosa and that all but complete repair of barrier function occurs in the absence of mitochondrial respiration.
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Affiliation(s)
- A M Cheng
- Department of Surgery, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA
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Yamini S, West KP, Wu L, Dreyfuss ML, Yang DX, Khatry SK. Circulating levels of retinol, tocopherol and carotenoid in Nepali pregnant and postpartum women following long-term β-carotene and vitamin A supplementation. Eur J Clin Nutr 2001; 55:252-9. [PMID: 11360129 DOI: 10.1038/sj.ejcn.1601152] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2000] [Revised: 11/02/2000] [Accepted: 11/06/2000] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To characterize circulating carotenoid and tocopherol levels in Nepali women during pregnancy and post-partum and to determine the effects of beta-carotene and vitamin A supplementation on their concentration in serum. DESIGN Randomized community supplementation trial. SETTING The study was carried out from 1994 to 1997 in the Southern, rural plains District of Sarlahi, Nepal. SUBJECTS A total of 1431 married women had an ascertained pregnancy, of whom 1186 (83%) provided an analyzable serum sample during pregnancy; 1098 (77%) provided an analyzable 3-4 months post-partum serum sample. INTERVENTIONS Women received a weekly dose of vitamin A (7000 microg RE), beta-carotene (42 mg) or placebo before, during and after pregnancy. Serum was analyzed for retinol, alpha-tocopherol, gamma-tocopherol, beta-carotene, alpha-carotene, lycopene, lutein + zeaxanthin, and beta-cryptoxanthin concentrations during mid-pregnancy and at approximately 3 months post-partum. RESULTS Compared to placebo, serum retinol, beta-carotene, gamma-tocopherol, beta-cryptoxanthin and lutein + zeaxanthin concentrations were higher among beta-carotene recipients during pregnancy and, except for beta-cryptoxanthin, at postpartum. In the vitamin A group, serum retinol and beta-cryptoxanthin were higher during pregnancy, and retinol and gamma-tocopherol higher at postpartum. Lutein + zeaxanthin was the dominant carotenoid, regardless of treatment group, followed by serum beta-carotene. Serum lycopene level was lowest, and very low compared to the US population. Serum retinol was higher, and carotenoid and alpha-tocopherol lower, at postpartum than during pregnancy in all groups. CONCLUSIONS Pregnant and lactating Nepali women have lower serum carotenoid and tocopherol levels than well-nourished populations. beta-carotene supplementation appeared to increase levels of tocopherol and other carotenoids in this population.
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Affiliation(s)
- S Yamini
- Center for Human Nutrition, Department of International Health and the Sight and Life Institute, The Johns Hopkins School of Public Health, Baltimore, Maryland, USA
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O'Brien KO, Zavaleta N, Caulfield LE, Yang DX, Abrams SA. Influence of prenatal iron and zinc supplements on supplemental iron absorption, red blood cell iron incorporation, and iron status in pregnant Peruvian women. Am J Clin Nutr 1999; 69:509-15. [PMID: 10075338 DOI: 10.1093/ajcn/69.3.509] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND It is estimated that 60% of pregnant women worldwide are anemic. OBJECTIVE We aimed to examine the influence of iron status on iron absorption during pregnancy by measuring supplemental iron absorption, red blood cell iron incorporation, and iron status in pregnant women. DESIGN Subjects were 45 pregnant Peruvian women (33+/-1 wk gestation), of whom 28 received daily prenatal supplements containing 60 mg Fe and 250 microg folate without (Fe group, n = 14) or with (Fe+Zn group, n = 14) 15 mg Zn, which were were consumed from week 10 to 24 of gestation until delivery. The remaining 17 women (control) received no prenatal supplementation. Iron status indicators and isotopes were measured in maternal blood collected 2 wk postdosing with oral (57Fe) and intravenous (58Fe) stable iron isotopes. RESULTS Maternal serum ferritin and folate concentrations were significantly influenced by supplementation (P < 0.05). Serum iron was also significantly higher in the Fe than in the Fe+Zn (P < 0.03) or control (P < 0.001) groups. However, the supplemented groups had significantly lower serum zinc concentrations than the control group (8.4+/-2.3 and 10.9+/-1.8 micromol/L, respectively, P < 0.01). Although percentage iron absorption was inversely related to maternal serum ferritin concentrations (P = 0.036), this effect was limited and percentage iron absorption did not differ significantly between groups. CONCLUSIONS Because absorption of nonheme iron was not substantially greater in pregnant women with depleted iron reserves, prenatal iron supplementation is important for meeting iron requirements during pregnancy.
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Affiliation(s)
- K O O'Brien
- Center for Human Nutrition, The Johns Hopkins School of Hygiene and Public Health, Baltimore, MD 21205, USA.
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20
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Xu MY, Lu HM, Wang SZ, Shi WY, Wang XC, Yang DX, Yang CX, Yang LZ. Effect of devazepide reversed antagonism of CCK-8 against morphine on electrical and mechanical activities of rat duodenum in vitro. World J Gastroenterol 1998; 4:524-526. [PMID: 11819361 PMCID: PMC4723444 DOI: 10.3748/wjg.v4.i6.524] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the antagonism of cholecystokinin octapeptide (CCK-8) against the effect of morphine and its mechanism.
METHODS: The method and mechanical activities of rat duodenum in vitro were recorded simultaneously.
RESULTS: Acetylcholine (ACh) could increase the amplitude and the number of the spike potential (SPA and SPN) of rat duodenum in vitro, followed by the increase of the duodenal contraction amplitudes (CA), showing a positive correlation. Morphine, on the contrary, inhibited the potentiation of ACh, showing a negative correlation. CCK-8 could antagonize the effects of morphine, i.e. the SPA and SPN were increased again, followed by the increase of CA. CCK-A receptor antagonist Devazepide could reverse the antagonism of CCK-8 to the effect of morphine.
CONCLUSION: CCK-8 could antagonize the effect of morphine which inhibited the potentiation of ACh on the duodenal activities in vitro. The antagonistic effect of CCK-8 on morphine was mainly mediated by CCK-A receptor.
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Xu MY, Yang DX, Wang SZ, Jin HB, Zou XH, Yang XP, Han JS. Antagonistic effect of CCK-8 on morphine-inhibited electrical and contractile activities of rat jejunum in vitro. Sheng Li Xue Bao 1998; 50:469-73. [PMID: 11324560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
In the present investigation, antagonistic action of cholecystokinin octapeptide (CCK-8) against morphine on the electrical and contractile activity of rat jejunum in vitro was studied. The results showed that the potentiation of acetylcholine (ACh) on both the burst of spike and the contractility were inhibited by morphine, which could be completely antagonized by CCK-8. The CCK-8 effect, again, could be suppressed by CCK-A receptor antagonist devazepide (10 nmol/L), but partially by CCK-B receptor antagonist L-365, 260 at 10 nmol/L or completely at concentration of 30 nmol/L. The above results demonstrated that the antagonism of CCK-8 on morphine was mediated by both CCK-A and CCK-B receptors.
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Affiliation(s)
- M Y Xu
- Department of Physiology, Harbin Medical University, Harbin 150086
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Yang DX, He KQ, Cheng GF. [Effect of tremulacin on actions of SRS-A and histamine]. Yao Xue Xue Bao 1995; 30:254-257. [PMID: 7544944] [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: 05/21/2023]
Abstract
The effect of tremulacin (TRC) extracted from Mao Bai Yang (Folia Populus tomentosa Carr) on actions of SRS-A and histamine were investigated by using isolated guinea pig ileum and spectrofluorometric assay. TRC was found to inhibit the contraction of isolated guinea pig ileum induced by histamine and SRS-A, in a dose-dependent manner with IC50 of 1.78 x 10(-4) mol.L-1 and 2.51 x 10(-4) mol.L-1, respectively. TRC at the dose of 10(-4) mol.L-1 inhibited SRS-A release from sensitized isolated guinea pig lung. While at the dose of 10(-5) mol.L-1 inhibited histamine release from the peritoneal mast cells in sensitized rats. These results indicate that inhibition of the release of histamine and SRS-A may play an important role in the mechanism of antiinflammatory actions of TRC.
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Affiliation(s)
- D X Yang
- Department of Pharmacology, Chinese Academy of Medical Sciences, Beijing
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Cheng GF, Liu DP, Yang DX, He KQ, Bai JY, Zhu XY. Antiinflammatory effects of Tremulacin, a Salicin-related substance isolated from Populus tomentosa Carr. leaves. Phytomedicine 1994; 1:209-211. [PMID: 23195941 DOI: 10.1016/s0944-7113(11)80067-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Tremulacin was shown to inhibit carrageenan-induced paw edema in rats and croton oil-induced ear edema in mice. It was also found to inhibit peritoneal leucocyte migration in rats and acetic acid-induced writhing responses in mice. Experiments with isolated longitudinal muscle strips of sensitized guinea pig ileum showed that tremulacin decreased the biosynthesis of Slow Reaction Substance of Anaphylaxis. Tremulacin exerted inhibitory effects on leukotriene B4 biosynthesis in intrapleural leucocytes. These results suggest that the mechanism of antiinflammatory actions of tremulacin is relevant to inhibition of 5-lipoxygenase activity. This is quite different from non-steroid antiinflammatory drugs, such as aspirin, which inhibits prostaglandin synthesis and being a cyclooxygenase inhibitor.
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Affiliation(s)
- G F Cheng
- Institute of Materia Medica, Chinese Academy of Medical Sceinces, Beijing, China
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Yang DX. [232 cases of cholelithiasis and biliary ascariasis]. Zhonghua Bing Li Xue Za Zhi 1987; 16:107-9, 23. [PMID: 2962751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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