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Xu CB, Su SS, Yu J, Lei X, Lin PC, Wu Q, Zhou Y, Li YP. Risk factors and predicting nomogram for the clinical deterioration of non-severe community-acquired pneumonia. BMC Pulm Med 2024; 24:57. [PMID: 38280994 PMCID: PMC10821265 DOI: 10.1186/s12890-023-02813-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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 12/11/2023] [Indexed: 01/29/2024] Open
Abstract
BACKGROUND Currently, there remains insufficient focus on non-severe community-acquired pneumonia (CAP) patients who are at risk of clinical deterioration, and there is also a dearth of research on the related risk factors. Early recognition of hospitalized patients at risk of clinical deterioration will be beneficial for their clinical management. METHOD A retrospective study was conducted in The First Affiliated Hospital of Wenzhou Medical University, China, spanning from January 1, 2018 to April 30, 2022, and involving a total of 1,632 non-severe CAP patients. Based on whether their condition worsened within 72 h of admission, patients were divided into a clinical deterioration group and a non-clinical deterioration group. Additionally, all patients were randomly assigned to a training set containing 75% of patients and a validation set containing 25% of patients. In the training set, risk factors for clinical deterioration in patients with non-severe CAP were identified by using LASSO regression analysis and multivariate logistic regression analysis. A nomogram was developed based on identified risk factors. The effectiveness of the nomogram in both the training and validation sets was assessed using Receiver Operating Characteristic (ROC) curves, calibration curves, and decision curve analysis (DCA). RESULTS Age, body mass index (BMI), body temperature, cardiovascular comorbidity, respiratory rate, LDH level, lymphocyte count and D-dimer level were identified as risk factors associated with the clinical deterioration of non-severe CAP within 72 h of admission. The area under curve (AUC) value of the nomogram was 0.78 (95% CI: 0.74-0.82) in the training set and 0.75 (95% CI: 0.67-0.83) in the validation set. Furthermore, the calibration curves for both the training and validation sets indicated that the predicted probability of clinical deterioration aligned with the actual probability. Additionally, DCA revealed clinical utility for the nomogram at a specific threshold probability. CONCLUSION The study successfully identified the risk factors linked to the clinical deterioration of non-severe CAP and constructed a nomogram for predicting the probability of deterioration. The nomogram demonstrated favorable predictive performance and has the potential to aid in the early identification and management of non-severe CAP patients at elevated risk of deterioration.
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Affiliation(s)
- Cheng-Bin Xu
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou, Zhejiang Province, 325015, People's Republic of China
| | - Shan-Shan Su
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou, Zhejiang Province, 325015, People's Republic of China
| | - Jia Yu
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou, Zhejiang Province, 325015, People's Republic of China
| | - Xiong Lei
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou, Zhejiang Province, 325015, People's Republic of China
| | - Peng-Cheng Lin
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou, Zhejiang Province, 325015, People's Republic of China
| | - Qing Wu
- The Center of Laboratory and Diagnosis, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, 325015, People's Republic of China
| | - Ying Zhou
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou, Zhejiang Province, 325015, People's Republic of China.
| | - Yu-Ping Li
- The Key Laboratory of Interventional Pulmonology of Zhejiang Province, Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, South Baixiang, Ouhai District, Wenzhou, Zhejiang Province, 325015, People's Republic of China.
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Meng XL, Xue JS, Su SJ, Gou JM, Lu J, Chen CL, Xu CB. Total alkaloids from the seed embryo of Nelumbo nucifera Gaertn. improve cognitive impairment in APP/PS1 mice and protect Aβ-damaged PC12 cells. Nutr Neurosci 2023; 26:1243-1257. [PMID: 36370050 DOI: 10.1080/1028415x.2022.2145426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The seed embryo of Nelumbo nucifera Gaertn. is a famous traditional Chinese medicine and food which is considered conducive to the prevention of Alzheimer's disease (AD). In this study, the effect and mechanism of TASENN (total alkaloids from the seed embryo of Nelumbo nucifera Gaertn.) on AD mice and amyloid-β (Aβ) injured PC12 cells were evaluated. HPLC-UV analysis showed that the extracted TASENN (purity = 95.6%) mainly contains Liensinine, Isoliensinine, and Neferine (purity was 23.01, 28.02, and 44.57%, respectively). In vivo, oral treatment with TASENN (50 mg/kg/day for 28 days) improved the learning and memory functions of APP/PS1 transgenic mice, ameliorated the histopathological changes of cortical and hippocampal neurons, and inhibited neuronal apoptosis. We found that TASENN reduced the phosphorylation of Tau and the formation of neurofibrillary tangles (NFTs) in APP/PS1 mouse brain. Moreover, TASENN down-regulated the expression of APP and BACE1, ameliorated Aβ deposition, and inhibited microglial proliferation and aggregation. The elevated protein expression of CaM and p-CaMKII in APP/PS1 mouse brain was also reduced by TASENN. In vitro, TASENN inhibited the apoptosis of PC12 cells injured by Aβ25-35 and increased the cell viability. Aβ25-35-induced increase of cytosolic free Ca2+ level and high expression of CaM, p-CaMKII, and p-Tau were decreased by TASENN. Our findings indicate that TASENN has a potential therapeutic effect on AD mice and a protective effect on PC12 cells. The anti-AD activity of TASENN may be closely related to its negative regulation of the CaM pathway.
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Affiliation(s)
- Xue-Lian Meng
- School of Pharmaceutical Science, Liaoning University, Shenyang, People's Republic of China
- Research Center for Natural Product Pharmacy of Liaoning Province, Shenyang, People's Republic of China
| | - Jing-Su Xue
- School of Pharmaceutical Science, Liaoning University, Shenyang, People's Republic of China
| | - Shu-Jie Su
- School of Pharmaceutical Science, Liaoning University, Shenyang, People's Republic of China
| | - Jiang-Min Gou
- School of Pharmaceutical Science, Liaoning University, Shenyang, People's Republic of China
| | - Jing Lu
- School of Pharmaceutical Science, Liaoning University, Shenyang, People's Republic of China
- Research Center for Natural Product Pharmacy of Liaoning Province, Shenyang, People's Republic of China
| | - Chang-Lan Chen
- School of Pharmaceutical Science, Liaoning University, Shenyang, People's Republic of China
| | - Cheng-Bin Xu
- School of Environmental Science, Liaoning University, Shenyang, People's Republic of China
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Xue JS, Li JQ, Wang CC, Ma XH, Dai H, Xu CB, Meng XL. Dauricine alleviates cognitive impairment in Alzheimer's disease mice induced by D-galactose and AlCl 3 via the Ca 2+/CaM pathway. Toxicol Appl Pharmacol 2023; 474:116613. [PMID: 37414289 DOI: 10.1016/j.taap.2023.116613] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/23/2023] [Accepted: 06/30/2023] [Indexed: 07/08/2023]
Abstract
Alzheimer's disease (AD) is a common neurodegenerative disease in the elderly. Dysregulation of intracellular Ca2+ homeostasis plays a critical role in the pathological development of AD. Dauricine (DAU) is a bisbenzylisoquinoline alkaloid isolated from Menispermum dauricum DC., which can prevent the influx of extracellular Ca2+ and inhibit the release of Ca2+ from the endoplasmic reticulum. DAU has a potential for anti-AD. However, it is unclear whether DAU can exert its anti-AD effect in vivo by regulating the Ca2+ related signaling pathways. Here, we investigated the effect and mechanism of DAU on D-galactose and AlCl3 combined-induced AD mice based on the Ca2+/CaM pathway. The results showed that DAU (1 mg/kg and 10 mg/kg for 30 days) treatment attenuated learning and memory deficits and improved the nesting ability of AD mice. The HE staining assay showed that DAU could inhibit the histopathological alterations and attenuate neuronal damage in the hippocampus and cortex of AD mice. Studies on the mechanism indicated that DAU decreased the phosphorylation of CaMKII and Tau and reduced the formation of NFTs in the hippocampus and cortex. DAU treatment also reduced the abnormally high expression of APP, BACE1, and Aβ1-42, which inhibited the deposition of Aβ plaques. Moreover, DAU could decrease Ca2+ levels and inhibit elevated CaM protein expression in the hippocampus and cortex of AD mice. The molecular docking results showed that DAU may have a high affinity with CaM or BACE1. DAU has a beneficial impact on pathological changes in AD mice induced by D-galactose and AlCl3 and may act by negative regulation of the Ca2+/CaM pathway and its downstream molecules such as CaMKII and BACE1.
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Affiliation(s)
- Jing-Su Xue
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Jin-Qiu Li
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Cheng-Cheng Wang
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Xiao-Han Ma
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Hui Dai
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Cheng-Bin Xu
- School of Environmental Science, Liaoning University, Shenyang, China
| | - Xue-Lian Meng
- School of Pharmaceutical Science, Liaoning University, Shenyang, China.
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Meng XL, Liu SY, Xue JS, Gou JM, Wang D, Liu HS, Chen CL, Xu CB. Protective effects of Liensinine, Isoliensinine, and Neferine on PC12 cells injured by amyloid-β. J Food Biochem 2022; 46:e14303. [PMID: 35762411 DOI: 10.1111/jfbc.14303] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/24/2022] [Accepted: 06/02/2022] [Indexed: 12/14/2022]
Abstract
Excessive accumulation of amyloid-β (Aβ) is the leading cause of Alzheimer's disease (AD). Liensinine, Isoliensinine, and Neferine are main alkaloids in lotus seed embryos. In this paper, the protective effects of Liensinine, Isoliensinine, and Neferine on Aβ25-35 -injured PC12 cells were studied. It was found that Liensinine, Isoliensinine, and Neferine could improve the viability and reduce the apoptosis of PC12 cell induced by Aβ25-35 . These three alkaloids could also reduce the level of intracellular free Ca2+ and CaM expression in Aβ25-35 -treated cells, thereby inhibiting the phosphorylation of CaMKII and tau. In addition, these three compounds can inhibit the production of ROS in PC12 cells injured by Aβ25-35 . Our results suggest for the first time that Liensinine, Isoliensinine, and Neferine can inhibit hyperphosphorylation of tau protein by inhibiting the Ca2+ -CaM/CaMKII pathway, thereby reducing the apoptosis and death of PC12 cells damaged by Aβ25-35 . PRACTICAL APPLICATIONS: This study highlighted the protective effects and mechanisms of three main active ingredients (Liensinine, Isoliensinine, and Neferine) in the lotus embryo on a typical cell model of Alzheimer's disease (AD). The results revealed that three alkaloids in this healthy food might exert therapeutic potential for AD.
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Affiliation(s)
- Xue-Lian Meng
- School of Pharmaceutical Science, Liaoning University, Shenyang, China.,Key Laboratory of New Drug Research and Development of Liaoning Province, Shenyang, China
| | - Song-Yao Liu
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Jing-Su Xue
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Jiang-Min Gou
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Dan Wang
- School of Pharmaceutical Science, Liaoning University, Shenyang, China.,Key Laboratory of New Drug Research and Development of Liaoning Province, Shenyang, China
| | - Hong-Sheng Liu
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Chang-Lan Chen
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Cheng-Bin Xu
- School of Environmental Science, Liaoning University, Shenyang, China
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Wang KJ, Chen CH, Chen JJ(J, Ciou WS, Xu CB, Du YC. An Improved Sensing Method of a Robotic Ultrasound System for Real-Time Force and Angle Calibration. Sensors (Basel) 2021; 21:2927. [PMID: 33922012 PMCID: PMC8122492 DOI: 10.3390/s21092927] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/07/2021] [Accepted: 04/17/2021] [Indexed: 01/08/2023]
Abstract
An ultrasonic examination is a clinically universal and safe examination method, and with the development of telemedicine and precision medicine, the robotic ultrasound system (RUS) integrated with a robotic arm and ultrasound imaging system receives increasing attention. As the RUS requires precision and reproducibility, it is important to monitor the real-time calibration of the RUS during examination, especially the angle of the probe for image detection and its force on the surface. Additionally, to speed up the integration of the RUS and the current medical ultrasound system (US), the current RUSs mostly use a self-designed fixture to connect the probe to the arm. If the fixture has inconsistencies, it may cause an operating error. In order to improve its resilience, this study proposed an improved sensing method for real-time force and angle calibration. Based on multichannel pressure sensors, an inertial measurement unit (IMU), and a novel sensing structure, the ultrasonic probe and robotic arm could be simply and rapidly combined, which rendered real-time force and angle calibration at a low cost. The experimental results show that the average success rate of the downforce position identification achieved was 88.2%. The phantom experiment indicated that the method could assist the RUS in the real-time calibration of both force and angle during an examination.
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Affiliation(s)
- Kuan-Ju Wang
- Department of Biomedical Engineering, National Cheng Kung University, No.1, University Road, Tainan 70101, Taiwan; (K.-J.W.); (J.-J.C.); (C.-B.X.)
- Brain Navi Biotechnology Co., Ltd., No.66-1, Shengyi 5th Rd. Zhubei City, Hsinchu County 302041, Taiwan; (C.-H.C.); (W.-S.C.)
| | - Chieh-Hsiao Chen
- Brain Navi Biotechnology Co., Ltd., No.66-1, Shengyi 5th Rd. Zhubei City, Hsinchu County 302041, Taiwan; (C.-H.C.); (W.-S.C.)
- China Medical University Beigang Hospital, No.123, Xinde Road, Xinjia Village, Beigang Township, Yunlin County 65152, Taiwan
| | - Jia-Jin (Jason) Chen
- Department of Biomedical Engineering, National Cheng Kung University, No.1, University Road, Tainan 70101, Taiwan; (K.-J.W.); (J.-J.C.); (C.-B.X.)
| | - Wei-Siang Ciou
- Brain Navi Biotechnology Co., Ltd., No.66-1, Shengyi 5th Rd. Zhubei City, Hsinchu County 302041, Taiwan; (C.-H.C.); (W.-S.C.)
| | - Cheng-Bin Xu
- Department of Biomedical Engineering, National Cheng Kung University, No.1, University Road, Tainan 70101, Taiwan; (K.-J.W.); (J.-J.C.); (C.-B.X.)
| | - Yi-Chun Du
- Department of Biomedical Engineering, National Cheng Kung University, No.1, University Road, Tainan 70101, Taiwan; (K.-J.W.); (J.-J.C.); (C.-B.X.)
- Medical Device Innovation Center, National Cheng Kung University, No.1, University Road, Tainan 70101, Taiwan
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6
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Meng XL, Chen ML, Chen CL, Gao CC, Li C, Wang D, Liu HS, Xu CB. Bisbenzylisoquinoline alkaloids of lotus (Nelumbo nucifera Gaertn.) seed embryo inhibit lipopolysaccharide-induced macrophage activation via suppression of Ca2+-CaM/CaMKII pathway. FOOD AGR IMMUNOL 2019. [DOI: 10.1080/09540105.2019.1638889] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Affiliation(s)
- Xue-Lian Meng
- School of Pharmaceutical Science, Liaoning University, Shenyang, People’s Republic of China
- Research Center for Natural Product Pharmacy of Liaoning Province, Shenyang, China
| | - Man-Ling Chen
- School of Pharmaceutical Science, Liaoning University, Shenyang, People’s Republic of China
| | - Chang-Lan Chen
- School of Pharmaceutical Science, Liaoning University, Shenyang, People’s Republic of China
- Research Center for Natural Product Pharmacy of Liaoning Province, Shenyang, China
| | - Cheng-Cheng Gao
- School of Pharmaceutical Science, Liaoning University, Shenyang, People’s Republic of China
| | - Chao Li
- School of Pharmaceutical Science, Liaoning University, Shenyang, People’s Republic of China
| | - Dan Wang
- School of Pharmaceutical Science, Liaoning University, Shenyang, People’s Republic of China
- Research Center for Natural Product Pharmacy of Liaoning Province, Shenyang, China
| | - Hong-Sheng Liu
- Research Center for Computer Simulating and Information Processing of Bio-macromolecules of Liaoning Province, Shenyang, People’s Republic of China
| | - Cheng-Bin Xu
- School of Environmental Science, Liaoning University, Shenyang, People’s Republic of China
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Hui XJ, Yang T, Li FY, Hu C, Wang T, Xu CB, Hou W, Ma F. [Health assessment on aquatic ecosystem in Liaohe River of Liaoning Province]. Ying Yong Sheng Tai Xue Bao 2011; 22:181-188. [PMID: 21548306] [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: 05/30/2023]
Abstract
Based on the investigation of the hydrology, water quality, periphytic algae, and habitat conditions of 20 hydrologic sections in the Tieling, Shenyang, and Panjin reaches of Liaohe River from June to August 2009, the indicators and their weights for the health assessment of aquatic ecosystem in the River were screened and determined by the method of principal component analysis, and the River's health assessment indicator system and health assessment standard system were constructed. The modified gray correlative degree method was also used to evaluate the aquatic ecosystem health condition at six sections of the River. Among the sections evaluated, three of them had a fair health level, two were worse or worst, and only one reached sub-health degree, suggesting that the aquatic ecosystem in the River was seriously degraded. Special attention should be paid to the ecological recovery of the river system, and comprehensive measures should be taken to control the River' s water pollution.
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Affiliation(s)
- Xiu-Juan Hui
- School of Environmental Science, Liaoning University, Shenyang 110036, China.
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Xu CB. [Unique guideline for management of dyslipidemia in China]. Zhonghua Nei Ke Za Zhi 2007; 46:446-9. [PMID: 17663813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
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Zhu ZM, Xu CB. [Pay attention to the research and control for metabolic syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2005; 33:105-6. [PMID: 15924801] [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: 05/02/2023]
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10
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Zhao BH, Xu CB. [Cloning and expression of ScFv gene against alpha-toxin of Clostridium perfringens type A]. Sheng Wu Gong Cheng Xue Bao 2001; 17:543-7. [PMID: 11797218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The VH and VL genes from a hybridoma cell line producing mouse McAb against alpha-toxin of Clostridium perfringens type A were amplified by RT-PCR. The VH and VL genes were connected thought a flexible linker (Gly4Ser)3 and the VH-linker-VL (ScFv) gene was cloned into a vector pGEM-T. The ScFv gene consists of 726 bp encoding 242 amino acid residues. Both VH and VL genes were confirmed as functionally rearranged mouse immunoglobulin variable region. According to kabat classed method, the VH and VL gene segments belong to mouse Ig heavy chain subgroup II (B) and kappa light chain subgroup III respectively. The ScFv gene was amplified inserted the expression vector pHOG21 and transformed into E coli XL1-BLUE. The ScFv protein was highly expressed in recombinant strain XL1-BLUE (pHOG-2E3) and the expression level of the ScFv was about 25% of total bacteria protein by SDS-PAGE. The neutralization assay showed that the expressed ScFv protein could neutralize the phospholipase C activities of alpha-toxin.
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Affiliation(s)
- B H Zhao
- College of Life Science, Hebei Normal University, Shijiazhuang 050016, China
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11
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Saetrum Opgaard O, Adner M, Peters TH, Xu CB, Stavenow L, Gulbenkian S, Erlinge D, Edvinsson L, Sharma HS. Endocardial expression and functional characterization of endothelin-1. Mol Cell Biochem 2001; 224:151-8. [PMID: 11693192 DOI: 10.1023/a:1011952504093] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Endothelin-1 (ET-1), a 21 amino acid peptide exerts a wide range of biological activities including vasoconstriction, mitogenesis and inotropic effects on the heart. In this study, we examined whether endocardial endothelial cells express ET-1 and evaluated its functional properties. Using immunofluorescence localization method, we demonstrated cytoplasmic staining of ET-1 in the human endocardial endothelial cells from the right atrium and left ventricle. Employing reverse transcriptase polymerase chain reaction (RT-PCR) expression of ET-1 mRNA and its receptors ET(A) and ET(B) mRNAs were found in human myocardial as well as in endocardial endothelial cells. Biological activity of endocardial endothelial cells derived ET-1 was established as the conditioned media obtained from cultured porcine endocardial endothelial cells induced a slowly developing, strong and long-lasting contraction of circular rat aortic segments, with similar characteristics to that obtained with exogenous ET-1. Furthermore, the selective endothelin-A receptor antagonist, FR 139317, blocked the conditioned media induced contractions. Our results suggest that endocardial endothelial cells express and release biologically active ET-1 which could play a pivotal role in the regulation of myocardial contractility as well as a circulatory peptide may further act in other peripheral target organs.
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Yin CL, Xu CB, Wang SW. [Effect of aloe-emodin on c-myc gene expression of cultured vascular smooth muscle cells of injured artery]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:525-7, 537. [PMID: 12575400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To study the molecular mechanism of aloe-emodin (AE) in inhibiting smooth muscle cells' (SMC) proliferation. METHODS Deendothelialization was performed in abdominal aorta of Japanese white ear rabbits by using 3F Fogarty arterial embolectomy catheter. The media of abdominal aorta was isolated 48 hrs later for performing primary SMC culture. Cells were synchronized with G0/G1 phase by serum starvation, the AE was then added to the culture medium of experimental group, at a concentration of 20 micrograms/ml, and to the control group, equal volume of culture solution was added instead. The c-myc mRNA and protein expressions were examined 3 hrs later by using techniques of Northern blotting, Western blotting and immunocytochemistry respectively. RESULTS In comparing with the control group, neither the expression of c-myc mRNA nor the expression of c-myc protein was changed after addition of AE. CONCLUSION The inhibition of AE on SMC might not be due to influencing c-myc expression, but via other pathway.
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Affiliation(s)
- C L Yin
- Department of Cardiology, Xuanwu Hospital, Capital Medical University, Beijing, 100053
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Affiliation(s)
- N M Morel
- Microvascular Research Laboratory, Boston University, Massachusetts 02215, USA
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14
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Zhao RC, Huang W, Xu XY, Tong XM, Qu YZ, Xu CB, Xue P. Abnormal branching ratios in laser-excited Rydberg series of Yb+, Ba+, and Sr+. Phys Rev A 1996; 53:3994-3999. [PMID: 9913363 DOI: 10.1103/physreva.53.3994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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15
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Stavenow L, Lindblad B, Xu CB. Unfractionated heparin and low molecular weight heparin do not inhibit the growth of proliferating human arterial smooth muscle cells in culture. Eur J Vasc Endovasc Surg 1995; 10:215-9. [PMID: 7655975 DOI: 10.1016/s1078-5884(05)80115-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVES To clarify the effects of unfractionated heparin (UH) and low molecular weight heparin (LMWH) on proliferating human smooth muscle cells (SMC) compared to growth arrested SMC. DESIGN A cell culture study where proliferating SMC were exposed to different concentrations of UH and LMWH and the effect on proliferation and collagen secretion was studied. Growth arrested SMC were stimulated with serum and the effect of UH on proliferation was measured. SETTING Sections of Medical Angiology and Vascular Surgery, Malmö General Hospital, Sweden. MATERIALS Human SMC were established from arterial tissue obtained at vascular surgery or at organ donation. CHIEF OUTCOME MEASURES Effects of UH and LMWH on total cellular DNA, 3H-thymidine incorporation and collagen secretion using proliferating and growth arrested human SMC in culture. MAIN RESULTS In proliferating SMC that had not been growth arrested, 1 and 10 IU/ml UH and LMWH significantly increased total cellular DNA compared to controls while DNA synthesis was not influenced. The higher cellular DNA was probably not a consequence of increased proliferation as DNA synthesis was not affected by UH or LMWH. The increased total cellular DNA could instead be due to reduced cell death. Higher concentrations (10 IU/ml) of UH and LMWH also increased collagen secretion. In control experiments with UH DNA, synthesis was decreased in stimulated human SMC that had been growth arrested previously to heparin exposure. CONCLUSIONS The effects of UH and LMWH on SMC proliferation will depend on the proliferative state of the SMC. The results might be of relevance for the understanding of the atherosclerotic process and for pharmacologic interventions to prevent restenosis after angioplasty or surgery.
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Affiliation(s)
- L Stavenow
- Department of Surgery, University Hospital of Malmö, University of Lund, Sweden
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16
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Xu CB, Stavenow L, Pessah-Rasmussen H. Interactions between cultured bovine arterial endothelial and smooth muscle cells; effects of modulated low density lipoproteins on cell proliferation and prostacyclin release. Scand J Clin Lab Invest 1994; 54:191-8. [PMID: 8036444 DOI: 10.1080/00365519409088424] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We exposed bovine aortic endothelial cells in culture to native LDL (n-LDL) and LDL modulated by dimethylsulfoxide (DMSO-LDL), dimethylsulfoxide-soluble particles from cigarette smoke (DSP-LDL) or Cu2+ (Cu(2+)-LDL) to explore the hypothesis that these LDL-forms might influence interactions between endothelial and smooth muscle cells. It was shown that 3H-thymidine incorporation into endothelial cells was decreased by DMSO-LDL, DSP-LDL and Cu(2+)-LDL compared to n-LDL, while it was higher by DSP-LDL compared to its control i.e. DMSO-LDL. These effects could be transferred by conditioned medium to smooth muscle cell cultures. DSP-LDL or Cu(2+)-LDL decreased total cellular protein of endothelial cells. Initial (15 min) prostacyclin release from endothelial cells was increased by all LDL preparations compared to medium without LDL, most pronounced for Cu(2+)-LDL. If n-LDL was control, only Cu(2+)-LDL significantly increased the release of prostacyclin during 15 min and during 24 h. The release of prostacyclin assayed after 24 h was depressed by DSP-LDL compared to DMSO-LDL. This study demonstrated that interactions between endothelial and smooth muscle cells could be influenced by LDL treated by dimethylsulfoxide-soluble particles from cigarette smoke or by Cu2+, and their effects were not similar. DSP-LDL, in contrast to Cu(2+)-LDL, significantly decreased the release of prostacyclin by endothelial cells after 24 h incubations and via endothelial cell conditioned medium stimulated smooth muscle cell proliferation judged by increased 3H-thymidine incorporation. The results might be of relevance for atherogenesis.
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Affiliation(s)
- C B Xu
- Department of Medicine, University of Lund, Malmö General Hospital, Sweden
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17
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Huang W, Xu XY, Xu CB, Xue M, Li LQ, Chen DY. Observation of strong electronic correlation for highly excited double Rydberg states of ytterbium. Phys Rev A 1994; 49:R653-R656. [PMID: 9910398 DOI: 10.1103/physreva.49.r653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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18
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Xu CB, Jiang BQ, Wang WM, Chen H, Guo DJ, Shen D, Chen BX, Mehta SS. Percutaneous transluminal excimer laser coronary angioplasty. Clinical report of six cases. Chin Med J (Engl) 1994; 107:19-24. [PMID: 8187568] [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: 01/29/2023] Open
Abstract
Six patients with 95% to 100% occluded atherosclerotic lesions underwent percutaneous transluminal excimer laser coronary angioplasty (PTELCA). Among them, 5 were male and 1 was female; their age ranged from 28 to 66 years. Four patients had LAD stenosis and 2 LCX lesions. Acute angiographic and clinical success was achieved in all patients but one, with a success rate of 83.3%. It was demonstrated that PTELCA is a safe and effective therapy for selected patients with coronary artery disease.
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Affiliation(s)
- C B Xu
- Cardiovascular Institute, People's Hospital, Beijing Medical University
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19
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Pessah-Rasmussen H, Seidegård J, Stavenow L, Solem JO, Lindblad B, Xu CB. Glutathione transferase activity in human vessels and in cultured arterial smooth muscle cells. INT ANGIOL 1993; 12:348-54. [PMID: 8207312] [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: 01/29/2023]
Abstract
Glutathione transferases play an important role in the detoxification of many different endogeneous and exogenous compounds such as metabolites of polycyclic aromatic hydrocarbons (PAH) of cigarette tar. There is evidence that PAH may be atherogenic. The glutathione transferase activity towards trans-stilbene oxide (GST-tSBO) can be separated in blood in GST-positive and GST-negative phenotypes. We have previously suggested that the GST-negative phenotype may be associated with a higher morbidity in intermittent claudication among middle aged smokers. In the present study, GST-tSBO could easily be measured in human, rabbit and bovine arterial smooth muscle cells (SMC) in culture. The level of GST-tSBO was higher in rabbit than in bovine SMC. It was stable in bovine SMC during 5 cell passages and it could be induced twofold by long-time incubation with dimethylsulfoxide-soluble particulate matter from cigarette smoke or 3,4-benzo(a)pyrene. There was a positive correlation between the level of GST-tSBO in blood and in "healthy" arterial and venous tissue from individuals operated with coronary bypass. The enzyme levels in arterial tissue were lower than in venous tissue. GST-tSBO in atherosclerotic segments of human arteries was lower than in "healthy" segments from the same artery. These findings suggest that the arterial wall may have a low defense against toxic compounds that may decrease further as atherosclerosis proceeds. It is concluded that SMC are suitable for the study of the effects of PAH in relation to GST-tSBO and that the enzyme activity in blood will reflect the individual GST-tSBO phenotype also in vascular tissues.
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20
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Xu CB, Stavenow L, Liao W, Erlinge D, Edvinsson L. Interactions between cultured bovine arterial endothelial and smooth muscle cells: studies on uptake and degradation of low density lipoproteins by smooth muscle cells. Pharmacol Toxicol 1993; 73:269-73. [PMID: 8115309 DOI: 10.1111/j.1600-0773.1993.tb00583.x] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This study was designed to investigate the effects of substances released from non-injured and injured bovine arterial endothelial cells on 125I-low density lipoprotein uptake and degradation by smooth muscle cells in culture. It was demonstrated that endothelial cell-released non-dialysable (molecular weight cut off 12-14000) substances significantly stimulated 125I-low density lipoprotein uptake and degradation by smooth muscle cells. Endothelial cell-released dialysable substances and endothelin-1 did not cause this stimulation. The increase in 125I-low density lipoprotein uptake and degradation by smooth muscle cells could be dissociated from cell proliferation. However, in endothelial cell-smooth muscle cell co-culture 125I-low density lipoprotein uptake and degradation by smooth muscle cells were not stimulated. Injury to endothelial cells by lipid-soluble smoke particles or ultraviolet light, which reduced total cellular protein by 15-25%, enhanced the endothelial cell release of the substances stimulating 125I-low density lipoprotein uptake. The results are discussed in relation to atherogenesis.
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MESH Headings
- Animals
- Aorta, Thoracic/cytology
- Aorta, Thoracic/metabolism
- Azepines/pharmacology
- Blood Proteins/pharmacology
- Cattle
- Cells, Cultured
- Endothelin Receptor Antagonists
- Endothelins/pharmacology
- Endothelium, Vascular/cytology
- Endothelium, Vascular/metabolism
- Humans
- Indoles/pharmacology
- Lipoproteins, LDL/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Radiation Injuries, Experimental
- Smoke
- Thymidine/pharmacology
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Affiliation(s)
- C B Xu
- Department of Medicine, University of Lund, Malmö General Hospital, Sweden
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21
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Xu CB. [Percutaneous transluminal peripheral excimer-laser angioplasty: two successful cases report]. Zhonghua Xin Xue Guan Bing Za Zhi 1993; 21:161-2, 187-8. [PMID: 8243231] [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: 01/29/2023]
Abstract
The excimer-laser (XeC1) operating at 308 nm, ablates by means of photochemical mechanisms with minimal thermal injury. Two male patients, 53 years and 67 years, with symptomatic peripheral vascular disease underwent percutaneous transluminal excimer-laser angioplasty (PTPELA). Both of them experienced claudication at a short walking distance and had superficial femoral or initial segmental femoral occlusions from 4 cm to 7 cm in length. The laser emitted 120ns pulses at 20 Hz with delivering 16-18 mJ by 7F and 9F catheter, energy density was about 4mJ/mm. The irradiation time was 157 seconds and 185 seconds respectively. Successful recanalization occurred in our two cases, the residual stenosis were less than 20%. The acute outcome was good without any complications.
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Affiliation(s)
- C B Xu
- People's Hospital, Beijing Medical University
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22
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Xu CB, Verwaerde C, Gras-Masse H, Fontaine J, Bossus M, Trottein F, Wolowczuk I, Tartar A, Capron A. Schistosoma mansoni 28-kDa glutathione S-transferase and immunity against parasite fecundity and egg viability. Role of the amino- and carboxyl-terminal domains. J Immunol 1993; 150:940-9. [PMID: 8423348] [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: 01/30/2023]
Abstract
We have previously shown that a mAb that inhibits the enzymatic activity of the Schistosoma mansoni 28-kDa glutathione S-transferase (Sm28 GST) also reduces female worm fecundity and egg viability in vivo and in vitro. By peptidic epitope mapping and an activity reconstitution assay, the carboxyl terminus (CT) amino acid residues 190-211 and to a lesser extent the truncated amino terminus (NT) residues 10-43 of the enzyme were identified as mAb recognition sites. Sera from rats immunized with the NT (10-43) and CT (190-211) peptides showed a partial inhibitory effect on Sm28 GST activity in a late phase (6 to 7 wk) but not in an early phase (2 to 4 wk) after immunization. Passive transfer of Sm28 GST-inhibiting anti-N- and C-terminal sera, but not of the noninhibitory sera, protected the infected mice by reducing tissue egg deposition and the ability of eggs to hatch. In active immunization experiments, the CT peptide significantly decreased the worm burden (37 to 40%) in mice as did the rSm28 GST (28 to 52%). In terms of tissue egg deposition and egg-hatching ability, immunization with both the NT and CT peptides reproduced the reduction observed after immunization with rSm28 GST. A constant reduction in egg numbers was noted in the small intestines and the livers of the immunized mice. A clear reduction in the ability of intestinal or hepatic eggs to hatch was observed. The results are discussed in terms of the conformational participation of the NT and CT of Sm28 in the expression of GST activity.
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Affiliation(s)
- C B Xu
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
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23
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Xu CB, Verwaerde C, Gras-Masse H, Fontaine J, Bossus M, Trottein F, Wolowczuk I, Tartar A, Capron A. Schistosoma mansoni 28-kDa glutathione S-transferase and immunity against parasite fecundity and egg viability. Role of the amino- and carboxyl-terminal domains. The Journal of Immunology 1993. [DOI: 10.4049/jimmunol.150.3.940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
We have previously shown that a mAb that inhibits the enzymatic activity of the Schistosoma mansoni 28-kDa glutathione S-transferase (Sm28 GST) also reduces female worm fecundity and egg viability in vivo and in vitro. By peptidic epitope mapping and an activity reconstitution assay, the carboxyl terminus (CT) amino acid residues 190-211 and to a lesser extent the truncated amino terminus (NT) residues 10-43 of the enzyme were identified as mAb recognition sites. Sera from rats immunized with the NT (10-43) and CT (190-211) peptides showed a partial inhibitory effect on Sm28 GST activity in a late phase (6 to 7 wk) but not in an early phase (2 to 4 wk) after immunization. Passive transfer of Sm28 GST-inhibiting anti-N- and C-terminal sera, but not of the noninhibitory sera, protected the infected mice by reducing tissue egg deposition and the ability of eggs to hatch. In active immunization experiments, the CT peptide significantly decreased the worm burden (37 to 40%) in mice as did the rSm28 GST (28 to 52%). In terms of tissue egg deposition and egg-hatching ability, immunization with both the NT and CT peptides reproduced the reduction observed after immunization with rSm28 GST. A constant reduction in egg numbers was noted in the small intestines and the livers of the immunized mice. A clear reduction in the ability of intestinal or hepatic eggs to hatch was observed. The results are discussed in terms of the conformational participation of the NT and CT of Sm28 in the expression of GST activity.
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Affiliation(s)
- C B Xu
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - C Verwaerde
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - H Gras-Masse
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - J Fontaine
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - M Bossus
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - F Trottein
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - I Wolowczuk
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - A Tartar
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
| | - A Capron
- Centre d'Immunologie et de Biologie Parasitaire, Unité INSERM 167-CNRS 624, Institut Pasteur, Lille, France
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24
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Grzych JM, Grezel D, Xu CB, Neyrinck JL, Capron M, Ouma JH, Butterworth AE, Capron A. IgA antibodies to a protective antigen in human Schistosomiasis mansoni. J Immunol 1993; 150:527-35. [PMID: 8419485] [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: 01/30/2023]
Abstract
The specific IgA antibody responses to the protective recombinant Schistosoma mansoni 28-kDa glutathione-S-transferase (Sm28GST) Ag and to derived synthetic peptides have been evaluated before and 6 mo after chemotherapy in S. mansoni-infected patients from Kenya. These studies revealed a parallelism between the age-dependent evolution of IgA antibody levels to Sm28GST and to one synthetic peptide (115-131) and the acquisition of resistance to reinfection. Functional analysis revealed that IgA antibodies to Sm28GST displayed a potent neutralizing effect on the enzymatic properties of the molecule, and also markedly impaired schistosome fecundity, by limiting both the egg laying of mature worms and the hatching capacity of schistosome eggs into viable miracidia. These results suggest that, in addition to IgE, IgA antibodies might participate in the protective immune response against schistosomiasis.
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Affiliation(s)
- J M Grzych
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
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25
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Grzych JM, Grezel D, Xu CB, Neyrinck JL, Capron M, Ouma JH, Butterworth AE, Capron A. IgA antibodies to a protective antigen in human Schistosomiasis mansoni. The Journal of Immunology 1993. [DOI: 10.4049/jimmunol.150.2.527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
The specific IgA antibody responses to the protective recombinant Schistosoma mansoni 28-kDa glutathione-S-transferase (Sm28GST) Ag and to derived synthetic peptides have been evaluated before and 6 mo after chemotherapy in S. mansoni-infected patients from Kenya. These studies revealed a parallelism between the age-dependent evolution of IgA antibody levels to Sm28GST and to one synthetic peptide (115-131) and the acquisition of resistance to reinfection. Functional analysis revealed that IgA antibodies to Sm28GST displayed a potent neutralizing effect on the enzymatic properties of the molecule, and also markedly impaired schistosome fecundity, by limiting both the egg laying of mature worms and the hatching capacity of schistosome eggs into viable miracidia. These results suggest that, in addition to IgE, IgA antibodies might participate in the protective immune response against schistosomiasis.
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Affiliation(s)
- J M Grzych
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
| | - D Grezel
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
| | - C B Xu
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
| | - J L Neyrinck
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
| | - M Capron
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
| | - J H Ouma
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
| | - A E Butterworth
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
| | - A Capron
- Centre d'Immunologie et de Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
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26
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Xu CB, Stavenow L, Pessah-Rasmussen H. Interactions between cultured bovine arterial endothelial and smooth muscle cells; studies on the release of prostacyclin by endothelial cells. Artery 1992; 19:94-111. [PMID: 1580800] [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: 12/27/2022]
Abstract
The release of prostacyclin by endothelial cells (EC) in culture was studied after exposure to two toxic stimuli (UV light or dimethylsulfoxide-soluble smoke particles (DSP)) or to medium conditioned by smooth muscle cells (SMC), basically or after injury to the SMC. An activity stimulating the release of prostacyclin was found together with growth inhibiting activity from arterial SMC, but dissociated from growth stimulating activity. The prostacyclin stimulating activity was increased when SMC were exposed to UV light, while DSP caused a decrease. EC directly exposed to UV light or DSP generally released more prostacyclin than controls. One exception was very low concentrations of DSP. UV light induced a burst of release in contrast to DSP where a continuous release after a two hours lag period was seen. It is concluded that EC will increase the release of prostacyclin in response to injury but the release pattern will depend on the kind and doses of the stimulus. SMC release prostacyclin stimulating activity for EC, which can be modified by exposure to toxic stimuli. The results might have applications for atherogenesis.
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MESH Headings
- Animals
- Cattle
- Cell Communication/physiology
- Cell Division/drug effects
- Cells, Cultured
- Culture Media, Serum-Free
- DNA/biosynthesis
- Dimethyl Sulfoxide
- Endothelium, Vascular/cytology
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/radiation effects
- Epoprostenol/metabolism
- Models, Biological
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/radiation effects
- Plants, Toxic
- Proteins/analysis
- Smoke/analysis
- Nicotiana
- Ultraviolet Rays
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Affiliation(s)
- C B Xu
- Department of Medicine, University of Lund, Malmö General Hospital, Sweden
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27
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Xu CB, Pessah-Rasmussen H, Stavenow L. Interactions between cultured bovine arterial endothelial and smooth muscle cells: effects of injury on the release of growth stimulating and growth inhibiting substances. Pharmacol Toxicol 1991; 69:195-200. [PMID: 1796060 DOI: 10.1111/j.1600-0773.1991.tb01296.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Dimethylsulfoxide-soluble particles (DSP) from cigarette smoke and ultraviolet light caused a low degree (cell death less than 30%) and high degree (cell death 60-90%) injury to bovine arterial endothelial cells and smooth muscle cells in culture. Conditioned medium from low degree injured endothelial cells and smooth muscle cells generally inhibited DNA synthesis in new smooth muscle cells or endothelial cells while high degree injury increased DNA synthesis in new cells. Specifically, the growth stimulating activity from endothelial cells was decreased after low degree injury but increased after high degree. UV light released more growth stimulating substances from smooth muscle cells after both low and high degree injury. The release of growth inhibiting substances was dependent on both cell kind and degree of injury. In co-culture low and high degree DSP injury to endothelial cells inhibited smooth muscle cell proliferation, which was in contrast to the effect of conditioned medium from high degree injured endothelial cells. Conditioned medium from endothelial cells treated with LDL and glucose inhibited DNA synthesis in smooth muscle cells. It is concluded that injury to endothelial cells or smooth muscle cells will modify the release of growth inhibiting and growth stimulating activity and that this release will depend on cell kind as well as degree and kind of the injurious stimulus.
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Affiliation(s)
- C B Xu
- Department of Medicine, University of Lund, Malmö General Hospital, Sweden
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28
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Xu CB, Verwaerde C, Grzych JM, Fontaine J, Capron A. A monoclonal antibody blocking the Schistosoma mansoni 28-kDa glutathione S-transferase activity reduces female worm fecundity and egg viability. Eur J Immunol 1991; 21:1801-7. [PMID: 1868871 DOI: 10.1002/eji.1830210804] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [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: 12/29/2022]
Abstract
The protective effects of two different monoclonal antibodies (mAb) raised against the Schistosoma mansoni 28-kDa glutathione S-transferase (Sm 28 GST) were investigated. Two mAb of the same isotype (IgM) have been selected according to the blocking effect on Sm 28 GST enzymatic activity (S13) or the lack of blockade (H12). When passively transferred into Fischer rats, both S13 and H12 significantly reduced the worm burden. In BALB/c mice clear effects on female worm fecundity and egg viability were observed when the S13 mAb was transferred; these effects included significantly reduced loads of intestinal eggs, reduced egg hatching rates and an increased proportion of non-living eggs. No effect on egg production and egg hatching was observed in H12-treated mice. In addition, worm pairs recovered from S13-but not H12-treated mice laid significantly fewer eggs in vitro, and normal worm pairs incubated in vitro with the S13 mAb produced significantly fewer eggs than those incubated with H12 mAb. The impairment of egg hatching ability was also reproduced in vitro by the S13 mAb. These data suggest the existence of two different effector mechanisms induced by immunization with Sm 28 GST. The effect on the schistosome worm burden appears to be independent of GST activity whereas the effect on S. mansoni female fecundity and egg viability seems to be significantly linked to the inactivation of the enzymatic site.
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Affiliation(s)
- C B Xu
- Centre d'Immunologie et Biologie Parasitaire, Unité Mixte INSERM U 167-CNRS 624, Institut Pasteur, Lille, France
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29
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Xu CB, Farias L, Bennett W, Lockard V, Markov AK. Increasing survival and prevention of myocardial injury in rats subjected to chronic ethanol administration with fructose 1–6 diphosphate (FDP). J Am Coll Cardiol 1990. [DOI: 10.1016/0735-1097(90)92359-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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30
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Farias LA, Xu CB, Lehan PH, Markov AK. HALOTHANE-EPINEPHRINE-INDUCED VENTRICULAR ARRHYTHMIAS (VA) PREVENTED BY FRUCTOSE 1–6 DIPHOSPHATE (FDP). Anesthesiology 1989. [DOI: 10.1097/00000542-198909001-00286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Tang J, Xie CW, Xu CB, Jiang BQ, Xu YY, Zhang JY, Meng ZH, Wu HJ, Liu LS, Chang D. Therapeutic actions of alpha-human atrial natriuretic polypeptide in 16 clinical cases. Life Sci 1987; 40:2077-86. [PMID: 2953943 DOI: 10.1016/0024-3205(87)90100-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Alpha-human atrial natriuretic polypeptide (alpha-hANP) was applied to 16 clinical patients, 6 patients with essential hypertension, 7 patients with congestive heart failure and 3 patients with cirrhosis. Following intravenous bolus injection of 400 micrograms of synthetic alpha-hANP, a hypotensive effect of very rapid onset was found, which was more potent in the hypertensive patients than in the normotensive cases. Cardiac functions were improved significantly with a similar time course as the depressor response in the cases of heart failure or hypertension. Hemodynamic observations showed a marked increase in cardiac output, cardiac index, stroke volume, ejection fraction and ejection rate, and a concomitant decrease of the pressure in the right side of the heart and pulmonary circulation in these subjects. In addition, the renal response to alpha-hANP induced obvious increases in urine volume, electrolytes and creatinine excretions in all the subjects. Finally, plasma levels of aldosterone, Arg-vasopressin and noradrenaline were also altered by alpha-hANP. No significant side effects were registered. The above result confirms the therapeutic actions of alpha-hANP in human subjects and opens the possibility to research alpha-hANP as a powerful pharmacological tool as well as potential new medicine for human disorders.
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32
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Xu CB, Jiang BQ, Wang JY, Sun NL, Chen H, Liu XR, Tian YW, Chen SJ, Li DG, Xie CW. Hemodynamic and renal effects of human alpha atrial natriuretic peptide in two patients with congestive heart failure. A preliminary report. Chin Med J (Engl) 1986; 99:1-8. [PMID: 2942345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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