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Sun CB, Han XQ, Wang H, Zhang YX, Wang MC, Liu YN. Effect of two surgical approaches on the lung function and prognosis of patients with combined esophagogastric cancer. World J Gastrointest Surg 2023; 15:1986-1994. [PMID: 37901732 PMCID: PMC10600760 DOI: 10.4240/wjgs.v15.i9.1986] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/04/2023] [Accepted: 07/31/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Adenocarcinoma of the esophagogastric junction has a center of origin within 5 cm of the esophagogastric junction. Surgical resection remains the main treatment. A transthoracic approach is recommended for Siewert I adenocarcinoma of the esophagogastric junction and a transabdominal approach is recommended for Siewert III adenocarcinoma of the esophagogastric junction. However, there is a need to determine the optimal surgical approach for Siewert II adenocarcinoma of the esophagogastric junction to improve lung function and the prognosis of patients. AIM To investigate and compare the surgical effects, postoperative changes in pulmonary function, and prognoses of two approaches to treating combined esophagogastric cancer. METHODS One hundred and thirty-eight patients with combined esophagogastric cancer treated by general and thoracic surgeries in our hospital were selected. They were divided into group A comprising 70 patients (transabdominal approach) and group B comprising 68 patients (transthoracic approach) based on the surgical approach. The indexes related to surgical trauma, number of removed lymph nodes, indexes of lung function before and after surgery, survival rate, and survival duration of the two groups were compared 3 years after surgery. RESULTS The duration of surgery, length of hospital stay, and postoperative drainage duration of the patients in group A were shorter than those of the patients in group B, and the volume of blood loss caused by surgery was lower for group A than for group B (P < 0.05). At the one-month postoperative review, the first second, maximum ventilation volume, forceful lung volume, and lung volume values were higher for group A than for group B (P < 0.05). Preoperatively, the QLQ-OES18 scale scores of the patients in group A were higher than those in group B on re-evaluation at 3 mo postoperatively (P < 0.05). The surgical complication rate of the patients in group A was 10.00%, which was lower than that of patients in group B, which was 23.53% (P < 0.05). CONCLUSION Transabdominal and transthoracic surgical approaches are comparable in treating combined esophagogastric cancer; however, the former results in lesser surgical trauma, milder changes in pulmonary function, and fewer complications.
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Affiliation(s)
- Chong-Bing Sun
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Xiao-Qing Han
- Department of Spinal Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Hao Wang
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Yi-Xuan Zhang
- Department of Medical, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Meng-Chun Wang
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Yong-Ning Liu
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
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Han XQ, Liu JY, Lu JB, Liang RX, Jia YX. Dearomatizing [2+2+1] Spiroannulation of Indoles with Alkynes. Org Lett 2023; 25:261-266. [PMID: 36546773 DOI: 10.1021/acs.orglett.2c04119] [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: 12/24/2022]
Abstract
A palladium-catalyzed dearomatizing [2+2+1] spiroannulation of indoles with two molecular internal alkynes is developed in the presence of Cu(OAc)2/O2 as the oxidant, in which a domino sequence including C-H activation of indole followed by consecutive Heck reactions is involved. A range of 3,3'-spiroindolines bearing tetrasubstituted cyclopentadiene moieties and exocyclic C═C bonds at C2 are obtained in moderate to excellent yields.
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Affiliation(s)
- Xiao-Qing Han
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road 18#, Hangzhou 310014, China
| | - Jing-Yuan Liu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road 18#, Hangzhou 310014, China
| | - Jin-Bo Lu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road 18#, Hangzhou 310014, China
| | - Ren-Xiao Liang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road 18#, Hangzhou 310014, China
| | - Yi-Xia Jia
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road 18#, Hangzhou 310014, China.,Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, Hangzhou 310024, China
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Han XQ, Wang L, Yang P, Liu JY, Xu WY, Zheng C, Liang RX, You SL, Zhang J, Jia YX. Enantioselective Dearomative Mizoroki–Heck Reaction of Naphthalenes. ACS Catal 2021. [DOI: 10.1021/acscatal.1c05008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiao-Qing Han
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road No. 18, Hangzhou 310014, China
| | - Lei Wang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
| | - Ping Yang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Jing-Yuan Liu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road No. 18, Hangzhou 310014, China
| | - Wei-Yan Xu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road No. 18, Hangzhou 310014, China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Ren-Xiao Liang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road No. 18, Hangzhou 310014, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
| | - Junliang Zhang
- Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
| | - Yi-Xia Jia
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Chaowang Road No. 18, Hangzhou 310014, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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Sun CB, Wang HY, Han XQ, Liu YN, Wang MC, Zhang HX, Gu YF, Leng XG. LINC00511 promotes gastric cancer cell growth by acting as a ceRNA. World J Gastrointest Oncol 2020; 12:394-404. [PMID: 32368318 PMCID: PMC7191338 DOI: 10.4251/wjgo.v12.i4.394] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 02/04/2020] [Accepted: 03/22/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Gastric cancer (GC) is one of the most aggressive malignancies, with a high incidence and poor prognosis worldwide. Recently, accumulating evidence has illustrated that long noncoding RNAs (lncRNAs) play pivotal roles in many cancers. It has been reported that LINC00511 contributes to tumorigenesis in various diseases. However, the role of LINC00511 in GC cell growth remains mostly unknown. AIM To determine whether the lncRNA LINC00511 exerted its carcinogenic function in GC via the miR-124-3p/PDK4 axis. METHODS Cell culture and transfection, RNA extraction and quantitative real-time PCR, CCK-8 assay, Colony formation assay, Luciferase reporter assay, RIP assay, RNA pull-down assay, and Western blot analysis were used to show expression and mechanisms of LINC00511 in GC progression and apoptosis. Rescue assays were performed to verify the relationships among LINC00511, miR-124-3p and PDK4 further. RESULTS The expression of LINC00511 was remarkably upregulated in GC cells compared to that in corresponding normal cell lines. Compared to the controls, cell proliferation was inhibited, and cell apoptosis was increased upon LINC00511 knockdown, demonstrating that LINC00511 influenced GC cell growth. An exploration of the molecular mechanism revealed that LINC00511 functioned as a molecular sponge of miR-124-3p and that PDK4 was a downstream target of miR-124-3p in GC. Rescue assays showed that the overexpression of PDK4 could partly restore the inhibitory function of si-LINC00511 in GC. CONCLUSION These data demonstrate that LINC00511 promotes gastric cancer cell growth by acting as a ceRNA to regulate the miR-124-3p/PDK4 axis, which may be a promising therapeutic target for GC.
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Affiliation(s)
- Chong-Bing Sun
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Hong-Yi Wang
- Department of Anorectal Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Xiao-Qing Han
- Department of Spine Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Yong-Ning Liu
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Meng-Chun Wang
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Hong-Xia Zhang
- Department of Anorectal Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - You-Feng Gu
- Department of Anorectal Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
| | - Xiao-Gang Leng
- Department of Anorectal Surgery, Weifang People's Hospital, Weifang 261041, Shandong Province, China
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Wang Y, Zhang PP, Han XQ, Wang L, Fu AS, Wang HY. [Effects of glutathione on oxidative stress, leptin and adiponectin in patients with obstructive sleep apnea complicated with metabolic syndrome]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:726-729. [PMID: 31446727 DOI: 10.13201/j.issn.1001-1781.2019.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to analyze the effects of glutathione on oxidative stress, leptin and adiponectin in patients with obstructive sleep apnea(OSA) complicated with metabolic syndrome. Method:One hundred and fifty-nine patients with OSA and MS were enrolled in the group A according to the exclusion criteria. One hundred and fifty-nine patients with MS group were not included in the OSA group, and 159 patients were included in the control group. Before and after treatment, the levels of serum malondialdehyde (MDA), superoxide dismutase (SOD), Leptin and ADP were respectively detected, and the clinical effects of the three groups were compared. Result:Compared with the control group, the contents of MDA and Leptin in the case A and B groups were significantly higher than that of the control group, and the contents of SOD and ADP were significantly lower than that of the control group, and the difference was statistically significant, especially in case group A. The level of SOD and ADP was significantly higher in the group after treatment than before treatment, and the level of MDA and Leptin was significantly lower than before treatment. The difference was statistically significant, especially in case group A, too. Conclusion:Patients with OSA and MS are associated with oxidative stress. Glutathione can effectively improve the body's ability to resist oxidative stress, reduce oxidative damage, reduce leptin, and increase ADP levels.
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Affiliation(s)
- Y Wang
- Department of Respiratory Medicine,Affiliated Hospital of North China University of Technology,Tangshan,063000,China
| | - P P Zhang
- Department of Respiratory Medicine,Affiliated Hospital of North China University of Technology,Tangshan,063000,China
| | - X Q Han
- Department of Respiratory Medicine,Affiliated Hospital of North China University of Technology,Tangshan,063000,China
| | - L Wang
- Department of Respiratory Medicine,Affiliated Hospital of North China University of Technology,Tangshan,063000,China
| | - A S Fu
- Department of Respiratory Medicine,Affiliated Hospital of North China University of Technology,Tangshan,063000,China
| | - H Y Wang
- Department of Respiratory Medicine,Affiliated Hospital of North China University of Technology,Tangshan,063000,China
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Lin XL, Sun QC, Lu Y, Han XQ, Zhao T, Zhou XH. [Proteomic analysis and verification of protein expression after upregulation of human CD99 in Hodgkin lymphoma cell line L428]. Zhonghua Xue Ye Xue Za Zhi 2019; 40:490-496. [PMID: 31340622 PMCID: PMC7342398 DOI: 10.3760/cma.j.issn.0253-2727.2019.06.008] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Indexed: 11/22/2022]
Abstract
Objective: To investigate the proteins expression difference after upregulation of human CD99 in Hodgkin Lymphoma cell line, L428 cell, and verify the function of differential proteins. Methods: The differential proteins were detected by two-dimensional fluorescence difference gel electrophoresis and mass spectrometry analysis, cluster analysis was done by GOfact. Results: There were 38 proteins screened out, of which 21 proteins were positively associated with CD99, while 17 proteins were negative. Among the 38 proteins, 32 proteins participated in biological process, and 35 proteins were involved in the composition and construction. And 28 proteins participated in multifaceted biological activities including antioxidation, protein binding, catalytic activity, regulation of enzyme, signal transduction, molecular structure, regulation of translation and ion transport. Conclusions: The changes of the differential proteins, correlated with cytoskeleton, cell differentiation, signal pathway and regulating gene expression, are closely relevant to the translation between Hodgkin/Reed-Sternberg and B lymphocyte cell.
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Affiliation(s)
- X L Lin
- Department of Pathology, Southern Medical University, Guangdong Province Key Laboratory of Molecular Tumor Pathology, Guangzhou 510515, China
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Zhang PP, Wang YH, Meng QL, Han XQ, Ge YL, Wang L, Liu C, Wang Y, Huang C, Wang HY. [Effects of butylphthalide on plasma nitric oxide and endothelin-1 in severe elderly OSAHS patients]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:242-245. [PMID: 30813694 DOI: 10.13201/j.issn.1001-1781.2019.03.014] [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] [Received: 09/19/2018] [Indexed: 06/09/2023]
Abstract
Objective:To investigate the effect of butylphthalide on plasma nitric oxide(NO) and endothelin-1(ET-1) in severe elderly OSAHS patients. Method:A total of 120 severe elderly OSAHS patients were chosen by PSG measurement. According to random number table method, OSAHS patients were randomly divided into non-invasive ventilation control group(n=40), butylphthalide treatment group(n=40) and butylphthalide combined with non-invasive ventilation group (n=40). Non-invasive ventilation control group was given double level airway positive pressure ventilation treatment for six months, butylphthalide treatment group accepted oral butylphthalide therapy for six months, butylphthalide combined with non-invasive ventilation group was given double level airway positive pressure ventilation treatment and accepted oral butylphthalide therapy for six months. The changes of plasma NO and ET-1 were detected by immunoenzyme adsorption before treatment and three and six months after treatment. Result:The difference of plasma NO and ET-1 before treatment in the three groups was not statistically significant (P>0.05). Compared with before treatment, the level of plasma NO decreased and the level of plasma ET-1 increased in the three groups after three and six months treatment (P<0.01). Compared with butylphthalide treatment group, the level of plasma NO increased and the level of plasma ET-1 decreased after 3 and 6 months of treatment in both non-invasive ventilation control group and butylphthalide combined with non-invasive ventilation group (P<0.05). Compared with non-invasive ventilation control group, the level of plasma NO increased and the level of plasma ET-1 decreased after 3 and 6 months of treatment in butylphthalide combined with non-invasive ventilation group (P<0.05). Conclusion:Butylphthalide may improve the vascular endothelial function of severe elderly OSAHS patients by increasing the level of NO and decreasing the level of ET-1 in plasma.
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Affiliation(s)
- P P Zhang
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
| | - Y H Wang
- Clinical Medicine College of North China University of Science and Technology
| | | | - X Q Han
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
| | - Y L Ge
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
| | - L Wang
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
| | - C Liu
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
| | - Y Wang
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
| | - C Huang
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
| | - H Y Wang
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Tangshan, 063000, China
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Li LR, Cui ZY, Wang HC, Song LX, Qi JH, Zhang PP, Han XQ, Wang HY. [Effects of ketotifen on fractional exhaled nitric oxide in patients with combined allergic rhinitis and asthma syndrome]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:1681-1683. [PMID: 29798127 DOI: 10.13201/j.issn.1001-1781.2017.21.014] [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: 07/07/2017] [Indexed: 11/12/2022]
Abstract
Objective:To study effects of ketotifen on fractional exhaled nitric oxide in patients with combined allergic rhinitis and asthma syndrome.Method:One hundred and twelve patients with asthma were selected from department of respiration, Affiliated Hospital of North China University of science and technology from January 2016 to 2017 in March. Eighty-four patients with allergic rhinitis were selected as the subjects, Randomly divided into two groups,including observed group(n=42) and control group(n=42).The control group was treated with antitussive,expectorant and inhaled corticosteroids, while the observed group in the control group combined with ketotifen 1 mg 2/ day oral treatment,the changes of FeNO and IL-17 in the two groups were compared after one month treament.Result:Before treatment, two groups of patients in general IL-17 and fractional exhaled nitric oxide ware no significant difference(P> 0.05).After treatment, compared to the control group, the observed group was significantly more effective,the difference was statistically significant(P <0.05);fractional exhaled nitric oxide in treatment group were lower than those in control group, the difference was statistically significant(P<0.05,P< 0.01).And the observed group was lower than the control group, and the differences were statistically significant,t(P<0.05).Conclusion:Ketotifen significantly reduce the FeNO of allergic rhinitis and asthma syndrome, reduce airway inflammation.
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Affiliation(s)
- L R Li
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
| | - Z Y Cui
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
| | - H C Wang
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
| | - L X Song
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
| | - J H Qi
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
| | - P P Zhang
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
| | - X Q Han
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
| | - H Y Wang
- Department of Respiration, Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000, China
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Han XQ, Zhang MY, Wu Y, Wang JW, Yu CL, Li QB, Yuan L, Li XR, Dong AY. [Pleural amoebic empyema: a case report]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2018; 31:567-569. [PMID: 31713398 DOI: 10.16250/j.32.1374.2018070] [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: 06/10/2023]
Abstract
In this paper, a case of pleural amoebic empyema and its diagnosis and treatment were reported.
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Affiliation(s)
- X Q Han
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - M Y Zhang
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - Y Wu
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - J W Wang
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - C L Yu
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - Q B Li
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - L Yuan
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - X R Li
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
| | - A Y Dong
- Department of Respiration, North China University of Science and Technology Affiliated Hospital, Hebei Province, Tangshan 063000, China
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Li LR, Qi JH, Cui ZY, Wang HC, Zhang PP, Han XQ, Wang HY. [The effect of monrustet on the exhalation of nitric oxide and inflammatory cytokines in patients with asthma combined with OSAHS]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:1589-1592. [PMID: 29797956 DOI: 10.13201/j.issn.1001-1781.2017.20.011] [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: 07/13/2017] [Indexed: 11/12/2022]
Abstract
Objective:To study the effect of monrustet on fractional exhaled nitric oxide and inflammatory cytokines in the elderly with bronchial asthma combined obstructive sleep apnea hypopnea syndrome.Method:150 cases diagnosed as asthma were enrolled in this study. The patients were divided into bronchial asthma combined with OSAHS (n=72)and bronchial asthma (n=78). According to the different treatment methods , patients were divided into observation group and control group. Two groups were given common treatment with inhaled corticosteroids, and the observation group was taken orally montrast 10mg/night additionally. The fractional exhaled nitric oxide was detected before and after treatment. Serum were collected for detection of tumor necrosis factor alpha (TNR-α), Creactive protein (CRP) and interleukin 6 (IL-6), according to the sleep monitoring results, the sleep apnea low ventilation index (AHI) was calculated, and the changes of FeNO level,CRP,TNR-α,IL-6 and AHI were analyzed in the two groups.Result:Before treatment, the gender, age, degree of disease, FeNO level,TNR-α, CRP,IL-6 and AHI differences were not statistically significant in the two groups (P>0.05).After treatment, both groups of FeNO, TNR-α,CRP,IL-6 and AHI decreased before treatment (P < 0.05).The observation group was lower than the control group, and the difference was statistically significant (FeNO level, AHIP< 0.01,TNR-α, CRP,IL-6 P< 0.05).Conclusion::Montelukast can reduce the FeNO level, the expression of TNR-α, CRP, and IL-6 of patients of bronchial asthma combined with OSAHS. Further improvement of the patient's condition, and provide reference value for the clinical medicine of patients with asthma.
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Affiliation(s)
- L R Li
- Department of Respiratory, the Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000,China
| | - J H Qi
- Department of Respiratory, the Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000,China
| | - Z Y Cui
- Department of Respiratory, the Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000,China
| | - H C Wang
- Department of Respiratory, the Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000,China
| | - P P Zhang
- Department of Respiratory, the Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000,China
| | - X Q Han
- Department of Respiratory, the Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000,China
| | - H Y Wang
- Department of Respiratory, the Affiliated Hospital of North China University of Science and Technology, Tangshan, 063000,China
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Han XQ, Xiao XY, Guo ZH, Xie YH, Zhu HW, Peng C, Liang YQ. Release of cadmium in contaminated paddy soil amended with NPK fertilizer and lime under water management. Ecotoxicol Environ Saf 2018; 159:38-45. [PMID: 29730407 DOI: 10.1016/j.ecoenv.2018.04.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 12/22/2017] [Revised: 04/19/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
Agricultural soils contaminated with cadmium (Cd) pose a risk to receiving surface water via drainage or runoff. A 90-day laboratory incubation experiment was conducted to investigate the release characteristics and transformation of Cd from contaminated paddy soil amended with agrochemical (NPK fertilizer) and lime (L) under water management regimes of continuous flooding (F) and drying-wetting cycles (DW). The result showed that the dissolved Cd concentrations in overlying water of the fertilizer treatment under flooding (NPK+F) and drying-wetting (NPK+DW) reached up to 81.0 μg/L and 276 μg/L, and were much higher than that from the corresponding controls without NPK fertilizer addition at the end of experiment. The Cd concentration showed significantly negative correlation with overlying water pH, but positive correlation with soil redox potential and concentrations of dissolved total nitrogen, sulfate and manganese in overlying water (P < 0.05), indicating that drying-wetting cycles and N fertilizer addition may enhance soil Cd release. The Cd concentrations in overlying water from all treatments except NPK+L+F treatment exceeded the Cd threshold limit of Chinese Environmental Quality Standards for Surface Water (10 μg/L Grade V) and poses potential risk to surface water quality. Meanwhile, the proportion of Cd in the acid-soluble fraction from all incubated soil except NPK+L+F treatment increased compared to before incubation. The results indicated that continuous flooding was a reasonable water management candidate coupled with lime addition for immobilizing soil Cd.
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Affiliation(s)
- Xiao-Qing Han
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xi-Yuan Xiao
- School of Metallurgy and Environment, Central South University, Changsha 410083, China.
| | - Zhao-Hui Guo
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Ye-Hua Xie
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hui-Wen Zhu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Chi Peng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Yu-Qin Liang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
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Zhang PP, Wang YH, Han XQ, Huang C, Ge YL, Wang Y, Zhao YN, Wang L, Wang JH, Wang HY. [Effect of butylphthalide on oxidative stress and cognitive function in old obstructive sleep apnea hypopnea syndrome patients]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:1422-1425. [PMID: 30550176 DOI: 10.13201/j.issn.1001-1781.2018.18.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Indexed: 11/12/2022]
Abstract
Objective:To explore the effect of butylphthalide on oxidative stress and cognitive function in old obstructive sleep apnea hypopnea syndrome (OSAHS)patients.Method:A total of 90 old OSAHS patients with cognitive impairment were choosed with Polysomnography(PSG). By random number table method OSAHS patients were randomly divided into non-invasive ventilator group (n=30), butylphthalide with non-invasive ventilator group(n=30) and treatment group of butylphthalide(n=30). Non-invasive ventilator group was given continuous positive airway pressure treatment for three months, butylphthalide with non-invasive ventilator group accepted oral butylphthalide therapy and continuous positive airway pressure treatment for three months, treatment group of butylphthalide only accepted oral butylphthalide therapy for three months. Cognitive function of three groups wered observed by the Montreal cognitive assessment scale (MoCA) before and after treatment, at the same time, the changes of serum superoxide dismutase(SOD) and malondialdehyde(MDA) were detected by immunoenzyme-linked adsorption.Result:The differences of serum SOD and MDA before treatment among the three groups were not statistically significant (P>0.05). Compared with before treatment, the level of serum SOD increased and the level of MDA decreased in the three groups (P<0.05). Compared with non-invasive ventilator group after treatment,the level of SOD increased and the level of MDA decreased in butylphthalide with non-invasive ventilator group (P<0.05), the level of SOD decreased and the level of MDA increased in treatment group of butylphthalide (P<0.05). Compared with treatment group of butylphthalide after treatment, the level of SOD increased and the level of MDA decreased in butylphthalide with non-invasive ventilator group (P<0.05); The scores of MoCA on cognitive function before treatment in the three groups was not statistically significant (P>0.05). After treatment the scores of MoCA on cognitive function in the three groups were higher than those before treatment (P<0.05). Compared with non-invasive ventilator group after treatment, the scores of MoCA increased in butylphthalide with non-invasive ventilator group (P<0.05),the the scores of MoCA decreased in treatment group of butylphthalide (P<0.05). Compared with treatment group of butylphthalide after treatment, the scores of MoCA increased in butylphthalide with non-invasive ventilator group (P<0.05).Conclution: Butylphthalide can improve the activity of antioxidant enzymes in the serum of old patients with OSAHS, inhibit the oxygen free radical and lipid peroxidation and to a certain extent improve the cognitive function.
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Affiliation(s)
- P P Zhang
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - Y H Wang
- Clinical Medicine College of North China University of Science and Technology
| | - X Q Han
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - C Huang
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - Y L Ge
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - Y Wang
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - Y N Zhao
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - L Wang
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - J H Wang
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
| | - H Y Wang
- Department of Respiration of North China University of Science and Technology Affiliated Hospital, 063000, China
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Feng WL, Guo ZH, Shi L, Xiao XY, Han XQ, Ran HZ, Xue QH. [Distribution and Accumulation of Cadmium in Paddy Soil and Rice Affected by Pollutant Sources Control and Improvement Measures]. Huan Jing Ke Xue 2018; 39:399-405. [PMID: 29965707 DOI: 10.13227/j.hjkx.201706233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objective of this study was to determine the effect of five scenarios on the accumulation of Cd in the soil-rice system, including the return of straw to the field and the lack of the return, atmospheric deposition control, use of clean water for irrigation, and the use of lime. For the field experiments, three typical paddies were selected and divided into five plots (5 m×6 m) in Xiangtan, Zhuzhou, and Liling in the Hunan province from April to October 2016. The results showed that the application of lime can increase pH by 0.87, while the available Cd concentration in the soil was decreased by 33.7%. The accumulations of Cd in roots, stems, and brown rice were decreased by 47.9%, 46.7%, and 54.8%, respectively, with a decrease in the corresponding bioconcentration factors. Irrigating with clean water and liming tended to increase the soil pH by 0.44 and 0.49, respectively, while the available Cd concentration in the soil was decreased by 18.2% and 14.5%, respectively. The Cd concentrations in roots, stems, and brown rice were decreased by 32.6%, 24.2%, and 18.0%, and 17.6%, 11.3%, and 25.4% with decreased bioconcentration factors under both treatments (irrigating with clean water and liming). The available Cd concentration in the soil was increased by 6.1% and the Cd accumulation in the rice plants also increased with the return of straw to the soil. The bioconcentration factors of the rice plants were also increased when the paddy straw was returned to the fields. The results showed that the measures, such as the use of lime, atmospheric deposition control, use of clean water for irrigation, and lack of the return of straw to the paddy soil, should be helpful for the safe production of brown rice. The possible long-term risks associated with returning straw to the paddy field should be evaluated scientifically.
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Affiliation(s)
- Wen-Li Feng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Zhao-Hui Guo
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Lei Shi
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xi-Yuan Xiao
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xiao-Qing Han
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hong-Zhen Ran
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Qing-Hua Xue
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
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Sun CB, Zhao AY, Ji S, Han XQ, Sun ZC, Wang MC, Zheng FC. Expression of annexin A5 in serum and tumor tissue of patients with colon cancer and its clinical significance. World J Gastroenterol 2017; 23:7168-7173. [PMID: 29093625 PMCID: PMC5656464 DOI: 10.3748/wjg.v23.i39.7168] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 06/20/2017] [Accepted: 08/08/2017] [Indexed: 02/07/2023] Open
Abstract
AIM To investigate the expression of annexin A5 in serum and tumor tissue of patients with colon cancer and to analyze its clinical significance.
METHODS Ninety-three patients with colon cancer treated at our hospital between February 2013 and March 2016 were included in an observation group, and 40 healthy individuals were included in a control group. Enzyme-linked immunosorbent assay was performed to determine the serum level of annexin A5, while immunohistochemistry was performed to determine the expression of annexin A5 in cancer tissues.
RESULTS The serum level of annexin A5 was 0.184 ± 0.043 ng/mL in the observation group, which was significantly higher than that in the control group (P < 0.05). Annexin A5 expression was detected in 79.31% of the patients with lymph node metastasis, which was significantly higher than that in patients without lymph node metastasis (P < 0.05). Moreover, annexin A5 expression was detected in 86.96% of the patients with stage III to IV disease, which was significantly higher than that in patients with stage I to II disease (P < 0.05). The serum level of annexin A5 was 0.215 ± 0.044 ng/mL in patients whose tumors were positive for annexin A5 expression, which was significantly higher than that in patients whose tumors were negative for annexin A5 expression (P < 0.05). The serum level of annexin A5 was correlated with annexin A5 expression in colon cancer tissues (r = 0.312, P < 0.05). When a cutoff value of > 0.148 ng/mL for serum level of annexin A5 was used in the diagnosis of colon cancer, the sensitivity was 83.90%, and the specificity was 57.50%.
CONCLUSION For patients with colon cancer, annexin A5 expression in cancer tissues is related to lymph node metastasis and tumor grade. Serum level of annexin A5 is related to annexin A5 expression in cancer tissues and is of diagnostic relevance.
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Affiliation(s)
- Chong-Bing Sun
- Department of General Surgery, Weifang People’s Hospital, Weifang 261000, Shandong Province, China
| | - Ai-Yan Zhao
- Department of General Surgery, Weifang People’s Hospital, Weifang 261000, Shandong Province, China
| | - Shuai Ji
- Department of Anorectal Surgery, Linqu People’s Hospital, Weifang 261000, Shandong Province, China
| | - Xiao-Qing Han
- Department of General Surgery, Weifang People’s Hospital, Weifang 261000, Shandong Province, China
| | - Zuo-Cheng Sun
- Department of General Surgery, Weifang People’s Hospital, Weifang 261000, Shandong Province, China
| | - Meng-Chun Wang
- Department of General Surgery, Weifang People’s Hospital, Weifang 261000, Shandong Province, China
| | - Fu-Chang Zheng
- Department of General Surgery, Weifang People’s Hospital, Weifang 261000, Shandong Province, China
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15
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Xiao XY, Wang MW, Zhu HW, Guo ZH, Han XQ, Zeng P. Response of soil microbial activities and microbial community structure to vanadium stress. Ecotoxicol Environ Saf 2017; 142:200-206. [PMID: 28411515 DOI: 10.1016/j.ecoenv.2017.03.047] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [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: 01/10/2017] [Revised: 03/26/2017] [Accepted: 03/28/2017] [Indexed: 05/28/2023]
Abstract
High levels of vanadium (V) have long-term, hazardous impacts on soil ecosystems and biological processes. In the present study, the effects of V on soil enzymatic activities, basal respiration (BR), microbial biomass carbon (MBC), and the microbial community structure were investigated through 12-week greenhouse incubation experiments. The results showed that V content affected soil dehydrogenase activity (DHA), BR, and MBC, while urease activity (UA) was less sensitive to V stress. The average median effective concentration (EC50) thresholds of V were predicted using a log-logistic dose-response model, and they were 362mgV/kg soil for BR and 417mgV/kg soil for DHA. BR and DHA were more sensitive to V addition and could be used as biological indicators for soil V pollution. According to a polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis, the structural diversity of the microbial community decreased for soil V contents ranged between 254 and 1104mg/kg after 1 week of incubation. As the incubation time increased, the diversity of the soil microbial community structure increased for V contents ranged between 354 and 1104mg/kg, indicating that some new V-tolerant bacterial species might have replicated under these conditions.
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Affiliation(s)
- Xi-Yuan Xiao
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Ming-Wei Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Hui-Wen Zhu
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Zhao-Hui Guo
- School of Metallurgy and Environment, Central South University, Changsha 410083, China.
| | - Xiao-Qing Han
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Peng Zeng
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
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16
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Chan BCL, Han XQ, Lui SL, Wong CW, Wang TBY, Cheung DWS, Cheng SW, Ip M, Han SQB, Yang XS, Jolivalt C, Lau CBS, Leung PC, Fung KP. Combating against methicillin-resistant Staphylococcus aureus - two fatty acids from Purslane (Portulaca oleracea L.) exhibit synergistic effects with erythromycin. ACTA ACUST UNITED AC 2014; 67:107-16. [PMID: 25212982 DOI: 10.1111/jphp.12315] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [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: 04/22/2014] [Accepted: 07/27/2014] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The aims of this study were to identify the active ingredients from Portulaca oleracea L. (PO) that could provide synergism with antibiotics against methicillin-resistant Staphylococcus aureus (MRSA) and their possible mechanisms of resistance inhibition. METHODS High-speed counter-current chromatography (HSCCC) coupled with gas chromatography-mass spectrometry and a panel of laboratory MRSA strains were used for checkerboard and efflux inhibitory assays. KEY FINDINGS Linoleic and oleic acids were identified from HSCCC fraction 18 of PO with synergistic antibacterial activity when combined with erythromycin against RN4220/pUL5054. Ethidium bromide efflux inhibitory studies revealed that linoleic and oleic acids may interfere the activity of MsrA pump. By comparing among a panel of linoleic and oleic acids analogues, unsaturated fatty acids in salt form with cis configuration and an increase in number of double bonds were found to further increase the antibacterial activity when used alone or in combination with antibiotics. CONCLUSION This study reported for the first time that two active ingredients, namely linoleic and oleic acids, were identified from PO with synergistic antibacterial activity when combined with erythromycin against MRSA RN4220/pUL5054 and possibly act by inhibiting the efflux pumps of the bacteria cells.
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Affiliation(s)
- Ben C L Chan
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Hong Kong, China; State Key Laboratory of Phytochemistry & Plant Resources in West China (CUHK), The Chinese University of Hong Kong, Hong Kong, China
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Ye L, Han XQ, Xu YY, Cai QH. Spatial analysis for spring bloom and nutrient limitation in Xiangxi bay of three Gorges Reservoir. Environ Monit Assess 2007; 127:135-45. [PMID: 17058009 DOI: 10.1007/s10661-006-9267-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2005] [Accepted: 04/18/2006] [Indexed: 05/12/2023]
Abstract
The spatial and temporal dynamics of physical variables, inorganic nutrients and phytoplankton chlorophyll a were investigated in Xiangxi Bay from 23 Feb. to 28 Apr. every six days, including one daily sampling site and one bidaily sampling site. The concentrations of nutrient variables showed ranges of 0.02-3.20 mg/L for dissolved silicate (Si); 0.06-2.40 mg/L for DIN (NH(4)N + NO(2)N + NO(3)N); 0.03-0.56 mg/L for PO(4)P and 0.22-193.37 microg/L for chlorophyll a, respectively. The concentration of chlorophyll a and inorganic nutrients were interpolated using GIS techniques. The results indicated that the spring bloom was occurred twice in space during the whole monitoring period (The first one: 26 Feb.-23 Mar.; the second one: 23 Mar.-28 Apr.). The concentration of DIN was always high in the mouth of Xiangxi Bay, and PO(4)P was high in the upstream of Xiangxi Bay during the whole bloom period. Si seems no obvious difference in space in the beginning of the spring bloom, but showed high heterogeneity in space and time with the development of spring bloom. By comparing the interpolated maps of chlorophyll a and inorganic variables, obvious consumptions of Si and DIN were found when the bloom status was serious. However, no obvious depletion of PO(4)P was found. Spatial regression analysis could explained most variation of Chl-a except at the begin of the first and second bloom. The result indicated that Si was the factor limiting Chl-a in space before achieved the max area of hypertrophic in the first and second bloom period. When Si was obviously exhausted, DIN became the factor limiting the Chl-a in space. Daily and bidaily monitoring of Site A and B, representing for high DIN: PO(4)P ratio and low DIN:PO(4)P ratio, indicated that the concentration of Si was decreased with times at both site A and B, and the dramatically drop of DIN was found in the end monitoring at site B. Multiple stepwise regression analysis indicated that Si was the most important factor affect the development of spring bloom both at site A and B in time series.
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Affiliation(s)
- L Ye
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan, 430072, P. R. China
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Qi BF, Liu YQ, Han XQ, Zhu XY, Chen LR. [Direct optical resolution of the enantiomers of biphenyl compounds by high performance liquid chromatography on amylose tris-(3,5-dimethylphenylcarbamate) stationary phase]. Se Pu 2001; 19:443-5. [PMID: 12545442] [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: 02/28/2023] Open
Abstract
A chiral stationary phase(CSP) was prepared by coating amylose tris-(3,5-dimethylphenylcarbamate) onto aminopropylated spherical silica gel. The enantioselective chromatographic separation of a series of biphenyl compounds with antihepatitis activity was performed for the first time on CSP. The effect of alcohol modifiers in mobile phase was investigated. The mobile phases used in the study were hexane modified by ethanol, 1-propanol, 1-butanol or 2-propanol. It was found that the retention times and the separation of the enantiomers of biphenyl compounds on the CSP were dramatically influenced by the nature of alcohols in the mobile phase, and the best alcohol modifier for some compounds was ethanol. The interaction between the stationary phase and samples was also discussed.
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Affiliation(s)
- B F Qi
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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19
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Hou JG, Han XQ, Liu HT, Wang YL, Gao JZ. Chiral separation of glycidyl selenide and glycidyl sulfide racemates on cellulose-based chiral stationary phases. J Chromatogr Sci 2001; 39:388-92. [PMID: 11565949 DOI: 10.1093/chromsci/39.9.388] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
In recent years, a growing interest has been paid to glycidyl selenide and glycidyl sulfide racemic compounds for their importance in the life science field. In this study, cellulose-based chiral stationary phases are employed for the separation of glycerin selenium and glycerin sulfur racemates. Most analytes obtain satisfactory separation. In order to optimize the resolution of racemates, mixtures of n-hexane with different alcohols are used as mobile phases. The structural features of these racemic compounds affecting chiral discrimination are discussed in detail. The results in this study suggest that the chiral recognition mechanism for these racemic compounds involve two factors: (a) the substitution residue on a nonchiral atom can play a direct or indirect effect during chiral discrimination and (b) the competition between hydrogen-bonding and pi-pi interaction exists for compounds containing both the hydroxyl and aromatic group at the same time. The two interactions play an opposite role in the chiral discrimination process.
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Affiliation(s)
- J G Hou
- Institute of Chemistry, Northwest Normal University, Lanzhou, China
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Abstract
Protease Q, a recently discovered subtilisin-like protease, exhibited unusual stability in 10% sodium dodecyl sulfate (SDS) and 8 M urea solutions. In 2% SDS it exhibited higher activity than the control, and in 10% SDS it retained 50% of its original activity when azocoll was used as substrate. Kinetic studies showed that the decrease in the activity of protease Q in SDS solutions followed a first order kinetics with a half-life of 446, 278, 78, and 24 h in 1%, 2%, 5%, and 10% SDS, respectively, at 25 degrees C. Protease Q was also stable against autolysis. In 20 mM Tris-HCl buffer (pH 8.3) containing 1.0 mM CaCl2, protease Q had a half life of 2822 h and 725 h at room temperature and at 37 degrees C, respectively. The enzyme was able to completely hydrolyze beta-lactoglobulin, beta-casein, and keratin in 8-10 M urea.
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Affiliation(s)
- X Q Han
- Department of Food Science, University of Wisconsin-Madison 53706, USA
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23
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Abstract
Microencapsulation is a relatively new technology that is used for protection, stabilization, and slow release of food ingredients. The encapsulating or wall materials used generally consist of starch, starch derivatives, proteins, gums, lipids, or any combination of them. Methods of encapsulation of food ingredients include spray-drying, freeze-drying, fluidized bed-coating, extrusion, cocrystallization, molecular inclusion, and coacervation. This paper reviews techniques for preparation of microencapsulated food ingredients and choices of coating material. Characterization of microcapsules, mechanisms of controlled release, and efficiency of protection/stabilization of encapsulated food ingredients are also presented.
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Affiliation(s)
- F Shahidi
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Canada
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Abstract
Catecholamines increase the amplitudes of oscillatory afterpotentials (OAP) and peak magnitude of the transient inward current (Iti) responsible for OAP. The objectives of this study were to determine whether beta-adrenoceptor stimulation can induce Iti, and to determine the mechanism by which beta-adrenoceptor stimulation increases the magnitude of Iti. Experiments were performed using standard two electrode voltage--clamp techniques in isolated rabbit Purkinje fibers. Holding potential was either -50 or -80 mV. The Iti was elicited by repolarizing steps, following 1.5 or 3 s activating steps to potentials near 0 mV. Isoproterenol (ISO) failed to induce the Iti at concentrations from 10(-8) to 10(-6)M. However ISO (10(-7)M) significantly increased peak magnitude of spontaneously occurring Iti (P less than 0.05), or Iti induced by acetylstrophanthidin (AS) (P less than 0.05). ISO also shifted the minimum activation voltage 10 mV more negative (P less than 0.05). The current-voltage relationship demonstrated that ISO significantly increased the range of potentials over which Iti greater than or equal to 5 nA occurred, but did not significantly shift the voltage at which maximum peak current was observed. Effects of ISO on Iti were blocked by 10(-7)M propranolol or atenolol. Mn2+ (2 mM) or verapamil (2 microM) blocked the slow inward current (Isi) more than 80% before substantially decreasing peak Iti. Either agent blocked stimulation of Isi but not Iti by ISO at 10(-7)M. In contrast, quinacrine (20 microM), an inhibitor of Na(+)-Ca2+ exchange, abolished stimulation of Iti by ISO while having no significant effect on Isi. Our results indicate that beta-adrenoceptor stimulation cannot induce Iti in rabbit Purkinje fibers, but can enhance the Iti induced by other means, by stimulating Na(+)-Ca2+ exchange.
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Affiliation(s)
- X Q Han
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
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Han XQ, Vohra MM. A sensitive method for simultaneous determination of histamine and noradrenaline with high-performance liquid chromatography/electrochemistry. Journal of Pharmacological Methods 1991; 25:29-40. [PMID: 2030584 DOI: 10.1016/0160-5402(91)90020-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A simple and reliable high-performance liquid chromatographic method is described for the simultaneous determination of histamine (His), which cannot be directly oxidized, and noradrenaline (NA), which can be directly oxidized within the useful working potential range. The isoindole products formed by precolumn derivatization of His and NA with o-phthalaldehyde (OPA) and 2-mercaptoethanol (2-ME) yielded a linear relationship of detection between the electrochemical signal and the compound content to a minimum detectable limit of 50 pg (signal-to-noise ratio = 3:1) for both compounds at 0.5 nA of detector range. Without 2-ME, OPA derivatives of both His and NA were not detectable electrochemically at the oxidation potential range from 0 to + 1 V. Although the peak potential was +0.85 V for both His and NA, we used +0.7 V for both compounds to keep background noise minimal. The capacity factors of some electrochemically interfering compounds were also determined. The significance of OPA/2-ME derivative of NA is discussed relative to the direct oxidation of catecholamines. An example of a practical application of the method to the determination of His and NA in rat cardiac tissue is presented.
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Affiliation(s)
- X Q Han
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
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26
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Han XQ, Tang SB, Zhang HY. [Effects of diazepam on the action potential and contractility of the rabbit papillary muscle]. Sheng Li Xue Bao 1987; 39:350-7. [PMID: 2825360] [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: 01/02/2023]
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27
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Han XQ. [Nursing for a patient with embolism of the cavernous sinus]. Zhonghua Hu Li Za Zhi 1984; 19:225-6. [PMID: 6568910] [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: 04/05/2023]
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