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Luo L, Sun Z, You Y, Han X, Lan C, Pei S, Su P, Zhang Z, Li Y, Xu S, Guo S, Lin D, Lin G, Li C, Huang W, Wu S, Wang MS, Chen S. Solid-State Lithium Batteries with Ultrastable Cyclability: An Internal-External Modification Strategy. ACS Nano 2024; 18:2917-2927. [PMID: 38221729 DOI: 10.1021/acsnano.3c07306] [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] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
A commonly used strategy to tackle the unstable interfacial problem between Li1.3Al0.3Ti1.7(PO4)3 (LATP) and lithium (Li) is to introduce an interlayer. However, this strategy has a limited effect on stabilizing LATP during long-term cycling or under high current density, which is due in part to the negative impact of its internal defects (e.g., gaps between grains (GBs)) that are usually neglected. Here, control experiments and theoretical calculations show clearly that the GBs of LATP have higher electronic conductivity, which significantly accelerates its side reactions with Li. Thus, a simple LiCl solution immersion method is demonstrated to modify the GBs and their electronic states, thereby stabilizing LATP. In addition to LiCl filling, composite solid polymer electrolyte (CSPE) interlayering is concurrently introduced at the Li/LATP interface to realize the internal-external dual modifications for LATP. As a result, electron leakage in LATP can be strictly inhibited from its interior (by LiCl) and exterior (by CSPE), and such dual modifications can well protect the Li/LATP interface from side reactions and Li dendrite penetration. Notably, thus-modified Li symmetrical cells can achieve ultrastable cycling for more than 3500 h at 0.4 mA cm-2 and 1500 h at 0.6 mA cm-2, among the best cycling performance to date.
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Affiliation(s)
- Linshan Luo
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Zhefei Sun
- State Key Lab of Physical Chemistry of Solid Surfaces, College of Materials, Xiamen University, Xiamen 361005, China
| | - Yiwei You
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Xiang Han
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Chaofei Lan
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Shanpeng Pei
- Shandong Electric Power Engineering Consulting Institute Corp, Ltd., Jinan 250013, China
| | - Pengfei Su
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Zhiyong Zhang
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Yahui Li
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Shaowen Xu
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Shengshi Guo
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Dingqu Lin
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Guangyang Lin
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Cheng Li
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Wei Huang
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Shunqing Wu
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Ming-Sheng Wang
- State Key Lab of Physical Chemistry of Solid Surfaces, College of Materials, Xiamen University, Xiamen 361005, China
| | - Songyan Chen
- Key Laboratory of Low Dimensional Condensed Matter Physics (Department of Education of Fujian Province), College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
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Su P, Zhang Z, Luo L, Zhang Z, Lan C, Li Y, Xu S, Han X, Lin G, Li C, Huang W, Chen S. Silicon Nanowire Array Weaved by Carbon Chains for Stretchable Lithium-Ion Battery Anode. Small 2023:e2307716. [PMID: 38100292 DOI: 10.1002/smll.202307716] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/14/2023] [Indexed: 12/17/2023]
Abstract
To manufacture flexible batteries, it can be a challenge for silicon base anode materials to maintain structural integrity and electrical connectivity under bending and torsion conditions. In this work, 1D silicon nanowire array structures combined with flexible carbon chains consisting of short carbon nanofibers (CNFs) and long carbon nanotubes (CNTs) are proposed. The CNFs and CNTs serve as chain joints and separate chain units, respectively, weaving the well-ordered Si nanowire array into a robust and integrated configuration. The prepared flexible and stretchable silicon array anode exhibits excellent electrochemical performance during dynamic operation. A high initial specific capacity of 2856 mAh g-1 is achieved. After 1000 cycles, a capacity retention of 60% (1602 mAh g-1 ) is maintained. Additionally, the capacity attenuation is less than 1% after 100 bending cycles. This excellent cycling stability is obtained with a high Si loading of 6.92 mg cm-2 . This novel approach offers great promise for the development of high-loading flexible energy-storage devices.
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Affiliation(s)
- Pengfei Su
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Ziqi Zhang
- Science and Technology on Analog Integrated Circuit Laboratory, Chongqing, 400000, China
| | - Linshan Luo
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Zhiyong Zhang
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Chaofei Lan
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Yahui Li
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Shaowen Xu
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Xiang Han
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Guangyang Lin
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Cheng Li
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Wei Huang
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Songyan Chen
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, China
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Jouenne A, Hamici K, Varlet I, Sourdon J, Daudé P, Lan C, Kober F, Landrier JF, Bernard M, Desrois M. Relationship of cardiac remodeling and perfusion alteration with hepatic lipid metabolism in a prediabetic high fat high sucrose diet female rat model. Biochem Biophys Res Commun 2023; 682:207-215. [PMID: 37826944 DOI: 10.1016/j.bbrc.2023.09.089] [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: 07/07/2023] [Revised: 09/08/2023] [Accepted: 09/28/2023] [Indexed: 10/14/2023]
Abstract
BACKGROUND AND AIMS Cardiovascular disease (CVD) is known to be linked with metabolic associated fatty liver disease and type 2 diabetes, but few studies assessed this relationship in prediabetes, especially among women, who are at greater risk of CVD. We aimed to evaluate cardiac alterations and its relationship with hepatic lipid metabolism in prediabetic female rats submitted to high-fat-high-sucrose diet (HFS). METHODS AND RESULTS Wistar female rats were divided into 2 groups fed for 5 months with standard or HFS diet. We analyzed cardiac morphology, function, perfusion and fibrosis by Magnetic Resonance Imaging. Hepatic lipid contents along with inflammation and lipid metabolism gene expression were assessed. Five months of HFS diet induced glucose intolerance (p < 0.05), cardiac remodeling characterized by increased left-ventricular volume, wall thickness and mass (p < 0.05). No significant differences were found in left-ventricular ejection fraction and cardiac fibrosis but increased myocardial perfusion (p < 0.01) and reduced cardiac index (p < 0.05) were shown. HFS diet induced hepatic lipid accumulation with increased total lipid mass (p < 0.001) and triglyceride contents (p < 0.05), but also increased mitochondrial (CPT1a, MCAD; (p < 0.001; p < 0.05) and peroxisomal (ACO, LCAD; (p < 0.05; p < 0.001) β-oxidation gene expression. Myocardial wall thickness and perfusion were correlated with hepatic β-oxidation genes expression. Furthermore, myocardial perfusion was also correlated with hepatic lipid content and glucose intolerance. CONCLUSION This study brings new insights on the relationship between cardiac sub-clinical alterations and hepatic metabolism in female prediabetic rats. Further studies are warranted to explore its involvement in the higher CVD risk observed among prediabetic women.
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Affiliation(s)
- A Jouenne
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - K Hamici
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - I Varlet
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - J Sourdon
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - P Daudé
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - C Lan
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - F Kober
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - J F Landrier
- Aix-Marseille Univ, INSERM, INRAE, C2VN, Marseille, France.
| | - M Bernard
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
| | - M Desrois
- Aix-Marseille Univ, CNRS, CRMBM, Marseille, France.
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Wang JZ, Zheng CL, Zheng H, Liu XG, Lan C. [Effects on extravascular lung water of lung protective ventilation strategy applied on piglets with acute respiratory distress syndrome induced by paraquat]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2022; 40:7-11. [PMID: 35255554 DOI: 10.3760/cma.j.cn121094-20201224-00715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To study the effects on extravascular lung water of lung protective ventilation strategy applying on piglets with acute respiratory distress syndrome (ARDS) induced by paraquat (PQ) under pulse indicating continuous cardiac output (PiCCO) monitoring. Methods: The piglets models with ARDS induced by PQ were established in June 2020 and all of them were received mechanical ventilation and divided into three groups according to tidal volume (V(T)) : small V(T) group (6 ml/kg) , middle V(T) group (10 ml/kg) and large V(T) group (15 ml/kg) , there were 5 piglets in each group. The positive end expiratory pressure (PEEP) were all setup on 10 cmH(2)O. The indexes such as arterial blood gas analysis, oxygenation index (OI) , extravascular lung water index (ELWI) and pulmonary vascular permeability index (PVPI) were monitored at time of before the model was established (baseline) , time of the model was established (t(0)) and 2 h (t(2)) , 4 h (t(4)) , 6 h (t(6)) after mechanical ventilation. Lung tissue were punctured at time of baseline, t(0) and t(6) to be stained by Hematoxylin-eosin (HE) staining and pulmonary pathology were observed under light microscopy. Results: The heart rate (HR) , mean arterial pressure (MAP) and partial pressure of carbon dioxide (PaCO(2)) of all groups were higher than the base value while the pH values, partial pressure of oxygen (PaO(2)) and OI were lower than the base value when the models were established (P<0.05) . After mechanical ventilation, the HR and MAP values of all groups at t(2), t(4) and t(6) were lower than t(0) while the PaCO(2) of t(4) and t(6) were all higher than t(0), the differences were statistically significant (P<0.05) . The PaO(2) and OI of all groups showed a trend of rising at first and then decreasing after mechanical ventilation. The MAP, PaO(2), PaCO(2) and OI of the middle V(T) group and large V(T) group were apparently lower than that of the small V(T) group at t(2), t(4) and t(6) (P<0.05) . The ELWI and PVPI at t(0) of all groups were higher than that of baseline (P<0.05) . The ELWI of the small V(T) group at t(6) were lower than t(0) of the same group and t(6) of the middle V(T) group and large V(T) group (P<0.05) . HE staining showed congestion and edema of alveolar tissue, swelling of capillaries, exudation of red blood cells and widening of alveolar septum in piglets after successful modeling. And further widening of alveolar septum and rupture of alveolar septum could be seen in the lung tissues of each group at t(6), and the injury was the slightest in the small V(T) group. Conclusion: The lung protective ventilation strategy can alleviate the extravascular lung water and ARDS induced by PQ and improve oxygenation.
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Affiliation(s)
- J Z Wang
- Department of Intensive Care Unit, High Tech Zone, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450007, China
| | - C L Zheng
- Department of Intensive Care Unit, High Tech Zone, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450007, China
| | - H Zheng
- Department of Intensive Care Unit, High Tech Zone, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450007, China
| | - X G Liu
- Department of Intensive Care Unit, High Tech Zone, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450007, China
| | - C Lan
- Department of Emergency Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, China
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Xu N, Liu C, Feng Y, Li F, Meng X, Lv Q, Lan C. Influence of the Internet of Things management system on hand hygiene compliance in an emergency intensive care unit. J Hosp Infect 2020; 109:101-106. [PMID: 33346043 DOI: 10.1016/j.jhin.2020.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 05/07/2020] [Revised: 12/01/2020] [Accepted: 12/10/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND Hand hygiene is a critical strategy for infection prevention in all healthcare settings. Automated electronic monitoring systems are expected to improve hand hygiene performance. AIM To investigate the impact of the Internet of Things (IoT) management system on hand hygiene compliance among medical staff in an emergency intensive care unit (EICU). METHODS This retrospective observational study was conducted between July 1st, 2017 and February 28th, 2018 in a 19-bed EICU. The changes in hand hygiene compliance among 54 members of medical staff and the incidence of hospital infections were compared, counted, and analysed before and after implementing the IoT management system in the EICU that was initiated on November 1st, 2017. FINDINGS After the application of the IoT management system, the hand hygiene compliance rates among the members of the medical staff before (29.5% (3347/11,338) vs 57.9% (4690/8094), P < 0.001) and after (59.9% (9915/16,556) vs 73.8% (17,194/23 286), P < 0.001) the contact with patients and surrounding environment significantly improved. However, hand hygiene compliance among three cleaning staff did not significantly improve after the application. Moreover, there was no significant difference in healthcare-acquired infection rates (2.535% (9/355) vs 2.047% (7/342), P = 0.667) nor in the detection rates of the four major multidrug-resistant bacteria in the EICU before and after the application of the IoT management system (P > 0.05). CONCLUSION The IoT management system significantly improved hand hygiene compliance among medical staff, except cleaners, in the EICU of one provincial hospital; however, the rates of nosocomial infection did not significantly decrease. The quality of hand hygiene implementation needs to be improved.
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Affiliation(s)
- N Xu
- Emergency Intensive Care Unit, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, PR China
| | - C Liu
- Department of Infection Management, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, PR China
| | - Y Feng
- Department of Infection Management, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, PR China
| | - F Li
- Department of Infection Management, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, PR China
| | - X Meng
- Emergency Intensive Care Unit, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, PR China
| | - Q Lv
- Emergency Intensive Care Unit, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, PR China
| | - C Lan
- Emergency Intensive Care Unit, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, PR China.
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Liao C, Hu L, Lan C. Hashimoto's thyroiditis associated with an extra-thyroidal triad of pretibial myxedema, ophthalmopathy, and acropachy. J BIOL REG HOMEOS AG 2020; 34:1085-1090. [PMID: 32683842 DOI: 10.23812/19-494-l-16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- C Liao
- Department of Dermatology, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, Sichuan, China
| | - L Hu
- DDepartment of Dermatology, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, Sichuan, China
| | - C Lan
- DDepartment of Dermatology, The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, Sichuan, China
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Fourny N, Guilbert L, Lan C, Jouenne A, Bernard M, Desrois M. Greater impairment of energy metabolism and coronary flow in type 2 diabetic female rats than in male during myocardial ischemia-reperfusion injury. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2020.03.087] [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: 11/17/2022]
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Lan C, Huang S, Lai S. 620 UVB radiation with high photon density induces dendritic cell maturation and contributes to cutaneous immune suppression via Treg cell expansion. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.631] [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: 10/24/2022]
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Huang J, Li H, Lan C, Lin Q, Weng H. RETROSPECTIVE ANALYSIS OF 17 CHINESE PATIENTS WITH SEVERE PULMONARY TB CHARACTERIZED BY ACUTE RESPIRATORY FAILURE AND DIFFUSE LUNG DISEASE. Chest 2019. [DOI: 10.1016/j.chest.2019.02.355] [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: 10/27/2022] Open
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Huang J, Li H, Lan C, Zou S, Weng H. CONCOMITANT SEVERE INFLUENZA AND CRYPTOCOCCAL INFECTION: A CASE REPORT AND LITERATURE REVIEW. Chest 2019. [DOI: 10.1016/j.chest.2019.02.356] [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: 10/27/2022] Open
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Li C, Lan C, Zhang X, Yin L, Hao X, Tian J, Lin L, Sun H, Yao Z, Feng X, Jia J, Yang Y. Evaluation of Diffusional Kurtosis Imaging in Sub-acute Ischemic Stroke: Comparison with Rehabilitation Treatment Effect. Cell Transplant 2019; 28:1053-1061. [PMID: 30907127 PMCID: PMC6728709 DOI: 10.1177/0963689719837919] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Stroke is a serious worldwide medical condition that causes neurological function disability. Diffusional kurtosis imaging, which measures the non-Gaussianity of water diffusion, has been demonstrated to be a sensitive biomarker in many neuro-pathologies. This study explores the relationship between neural function recovery and transformation of the ischemic lesion and/or corticospinal tract during the sub-acute phase after stroke by using diffusional kurtosis imaging. We performed a prospective study of function recovery and K metrics of 43 patients with sub-acute ischemic stroke in the middle cerebral artery territory. The effect of rehabilitation treatment was evaluated using both the Fugl-Meyer motor function score and modified Barthel index score at post-treatment compared with admission, and patients were allocated to two groups: good and poor rehabilitation effect (GRE and PRE). Metrics of diffusional kurtosis imaging within ischemic lesion and along the corticospinal tract were acquired, respectively. All three relative axial diffusional kurtoses (rKas) along the corticospinal tract in the GRE group ( n = 21) were significantly larger than those of the PRE group ( n = 22), including rKa in the posterior limb of internal capsule, rKa in the cerebral peduncle, and rKa in the basal part of the pons ( p = 0.014, 0.005, and 0.021, respectively). This multi-parametric magnetic resonance imaging study showed that diffusional kurtosis imaging has the potential to complement existing stroke imaging techniques and revealed its own advantages in elucidating the possible biophysical mechanism of functional restoration underlying ischemic stroke.
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Affiliation(s)
- C. Li
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - C. Lan
- Department of Rehabilitation, Huashan Hospital, Fudan University, Shanghai, China
- Department of Rehabilitation, Shanxi Dayi Hospital, Taiyuan, China
| | - X. Zhang
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
- Department of Radiotherapy, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, China
| | - L. Yin
- Department of Radiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, China
| | - X. Hao
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - J. Tian
- Department of Radiology, Renji Hospital, Shanghai Jiao Tong University, China
| | - L. Lin
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - H. Sun
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - Z. Yao
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - X. Feng
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
| | - J. Jia
- Department of Rehabilitation, Huashan Hospital, Fudan University, Shanghai, China
- Both the authors contributed equally to this article
| | - Y. Yang
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China
- Both the authors contributed equally to this article
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Lan C, Li J, Huang X, Heindl A, Wang Y, Yan S, Yuan Y. Stromal cell ratio based on automated image analysis as a predictor for platinum-resistant recurrent ovarian cancer. BMC Cancer 2019; 19:159. [PMID: 30777045 PMCID: PMC6380057 DOI: 10.1186/s12885-019-5343-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 02/01/2019] [Indexed: 02/03/2023] Open
Abstract
Background Identifying high-risk patients for platinum resistance is critical for improving clinical management of ovarian cancer. We aimed to use automated image analysis of hematoxylin & eosin (H&E) stained sections to identify the association between microenvironmental composition and platinum-resistant recurrent ovarian cancer. Methods Ninety-one patients with ovarian cancer containing the data of automated image analysis for H&E histological sections were initially reviewed. Results Seventy-one patients with recurrent disease were finally identified. Among 30 patients with high stromal cell ratio, 60% of the patients had platinum-resistant recurrence, which was significantly higher than the rate in patients with low stromal cell ratio (9.80%, P < 0.001). Multivariate logistic regression analysis revealed elevated CA125 level after 3 cycles of chemotherapy (P < 0.001) and high stromal cell ratio (P = 0.002) were the negative predictors of platinum-resistant relapse. The area under the curve (AUC) of receiver operating characteristic (ROC) curves of the models for predicting platinum-resistant recurrence with stromal cell ratio, normalization of CA125 level, and the combination of two parameters were 0.78, 0.79, and 0.89 respectively. Conclusions Our results demonstrated stromal cell ratio based on automated image analysis may be a potential predictor for ovarian cancer patients at high risk of platinum-resistant recurrence, and it could improve the predictive value of model when combined with normalization of CA125 level after 3 cycles of chemotherapy.
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Affiliation(s)
- C Lan
- Department of Gynecologic Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Guangzhou, China
| | - J Li
- Department of Gynecologic Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Guangzhou, China
| | - X Huang
- Department of Gynecologic Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Guangzhou, China
| | - A Heindl
- Centre for Evolution and Cancer, The Institute of Cancer Research, London, UK.,Centre for Molecular Pathology, The Royal Marsden Hospital, London, UK.,Division of Molecular Pathology, The Institute of Cancer Research, London, UK
| | - Y Wang
- Department of Gynecologic Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Guangzhou, China
| | - S Yan
- Department of Pathology, Sun Yat-sen University Cancer Centre, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Guangzhou, China
| | - Y Yuan
- Centre for Evolution and Cancer, The Institute of Cancer Research, London, UK. .,Centre for Molecular Pathology, The Royal Marsden Hospital, London, UK. .,Division of Molecular Pathology, The Institute of Cancer Research, London, UK.
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Lan C, Huang S, Wu C. 1403 High-glucose environment induces M1 macrophage polarization that impairs keratinocyte migration via TNF-α: A novel therapeutic approach promoting diabetic wound healing. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.1421] [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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Mathieu C, Tran T, Desrois M, Kober F, Lan C, Fourny N, Iche-Torres M, Lê T, Singer M, Mege J, Lalevée N, Bernard M, Leone M. Sex-mediated response to landiolol, a ß1 selectif adrenergic blocker, in myocardial dysfunction during sepsis. Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2018.02.146] [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: 10/17/2022]
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Fourny N, Lan C, Kober F, Bernard M, Desrois M. Tolerance to ischemia-reperfusion injury in a metabolic syndrome model: Effect of gender? Archives of Cardiovascular Diseases Supplements 2018. [DOI: 10.1016/j.acvdsp.2018.02.123] [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: 10/17/2022]
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16
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Lan C, Song JL, Yan LN, Yang JY, Wen TF, Li B, Xu MQ. Pediatric Donor to Adult Recipients in Donation After Cardiac Death Liver Transplantation: A Single-Center Experience. Transplant Proc 2018; 49:1383-1387. [PMID: 28736011 DOI: 10.1016/j.transproceed.2017.01.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 01/11/2017] [Accepted: 01/24/2017] [Indexed: 02/05/2023]
Abstract
BACKGROUND The impact of using liver allografts from donors who are younger than 14 years at the time of donation after cardiac death (DCD) liver transplantation in terms of early allograft dysfunction (EAD) and graft survival is undefined. To determine if adults undergoing DCD liver transplantation who receive a graft from a donor age younger than or equal to 13 years have similar outcomes to recipients of organs from older than 18-year-old donors. METHODS Records from adult patients undergoing DCD liver transplantation between March 2012 and December 2015 who received whole grafts from donors after cardiac death were reviewed. Patients with donors younger than or equal to 13 years (group 1) and older than 18 years (group 2) were compared for EAD rates, hepatic artery thrombosis (HAT), and graft survival. RESULTS Records of 60 DCD liver transplantation patients were analyzed. The 90-day and 1-year graft survival rate of both groups was 90% versus 96% (P = .427) and 80% versus 84% (P = .668), respectively. The EAD rates of groups 1 and 2 were 30% versus 34% (P = .806). The incidence of HAT was 20% in group 1 compared with 12% in group 2 (P = .610). Also, 0.7% < graft to recipient weight ratio (GRWR) <0.8% was also usable for pediatric donor to adult recipients. CONCLUSIONS Whole liver grafts from donors younger than or equal to 13 years can potentially be used in selected size-matched (GRWR >0.7%) DCD adult recipients.
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Affiliation(s)
- C Lan
- Institute of Hepatobiliary, Pancreatic and Intestinal Diseases, North Sichuan Medical College, Nanchong, Sichuan, China; Department of Hepatobiliary Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China
| | - J L Song
- Liver Transplantation Center, Department of Liver Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan Province, China
| | - L N Yan
- Liver Transplantation Center, Department of Liver Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan Province, China
| | - J Y Yang
- Liver Transplantation Center, Department of Liver Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan Province, China
| | - T F Wen
- Liver Transplantation Center, Department of Liver Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan Province, China
| | - B Li
- Liver Transplantation Center, Department of Liver Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan Province, China
| | - M Q Xu
- Liver Transplantation Center, Department of Liver Surgery, West China Hospital of Sichuan University, Chengdu, Sichuan Province, China.
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Martin K, Iyengar S, Kalyan A, Lan C, Simon AL, Stosic M, Kobara K, Ravi H, Truong T, Ryan A, Demko ZP, Benn P. Clinical experience with a single-nucleotide polymorphism-based non-invasive prenatal test for five clinically significant microdeletions. Clin Genet 2017; 93:293-300. [PMID: 28696552 DOI: 10.1111/cge.13098] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [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: 05/17/2017] [Accepted: 06/30/2017] [Indexed: 01/06/2023]
Abstract
Single-nucleotide polymorphism (SNP)-based non-invasive prenatal testing (NIPT) can currently predict a subset of submicroscopic abnormalities associated with severe clinical manifestations. We retrospectively analyzed the performance of SNP-based NIPT in 80 449 referrals for 22q11.2 deletion syndrome and 42 326 referrals for 1p36, cri-du-chat, Prader-Willi, and Angelman microdeletion syndromes over a 1-year period, and compared the original screening protocol with a revision that reflexively sequenced high-risk calls at a higher depth of read. The prevalence of these microdeletion syndromes was also estimated in the referral population. The positive predictive value of the original test was 15.7% for 22q11.2 deletion syndrome, and 5.2% for the other 4 disorders combined. With the revised protocol, these values increased to 44.2% for 22q11.2 and 31.7% for the others. The 0.33% false-positive rate (FPR) for 22q11.2 deletion syndrome decreased to 0.07% with the revised protocol. Similarly, the FPR for the other 4 disorders combined decreased from 0.56% to 0.07%. Minimal prevalences were estimated to be 1 in 1255 for 22q11.2 deletion syndrome and 1 in 1464 for 1p36, cri-du-chat, and Angelman syndromes combined. Our results show that these microdeletions are relatively common in the referral population, and that the performance of SNP-based NIPT is improved with high-depth resequencing.
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Affiliation(s)
- K Martin
- Natera, Inc., San Carlos, California
| | - S Iyengar
- Natera, Inc., San Carlos, California
| | - A Kalyan
- Natera, Inc., San Carlos, California
| | - C Lan
- Natera, Inc., San Carlos, California
| | - A L Simon
- Natera, Inc., San Carlos, California
| | - M Stosic
- Natera, Inc., San Carlos, California
| | - K Kobara
- Natera, Inc., San Carlos, California
| | - H Ravi
- Natera, Inc., San Carlos, California
| | - T Truong
- Natera, Inc., San Carlos, California
| | - A Ryan
- Natera, Inc., San Carlos, California
| | - Z P Demko
- Natera, Inc., San Carlos, California
| | - P Benn
- Department of Genetics and Genome Sciences, University of Connecticut Health Center, Farmington, Connecticut
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Wang X, Lang M, Zhao T, Feng X, Zheng C, Huang C, Hao J, Dong J, Luo L, Li X, Lan C, Yu W, Yu M, Yang S, Ren H. Cancer-FOXP3 directly activated CCL5 to recruit FOXP3 +Treg cells in pancreatic ductal adenocarcinoma. Oncogene 2017; 36:3048-3058. [PMID: 27991933 PMCID: PMC5454319 DOI: 10.1038/onc.2016.458] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 10/18/2016] [Accepted: 10/31/2016] [Indexed: 12/15/2022]
Abstract
Forkheadbox protein 3 (FOXP3), initially identified as a key transcription factor for regulatory T cells (Treg cells), was also expressed in many tumors including pancreatic ductal adenocarcinoma (PDAC). However, its role in PDAC progression remains elusive. In this study, we utilized 120 PDAC tissues after radical resection to detect cancer-FOXP3 and Treg cells by immunohistochemistry and evaluated clinical and pathological features of these patients. Cancer-FOXP3 was positively correlated with Treg cells accumulation in tumor tissues derived from PDAC patients. In addition, high cancer-FOXP3 expression was associated with increased tumor volumes and poor prognosis in PDAC especially combined with high levels of Treg cells. Overexpression of cancer-FOXP3 promoted the tumor growth in immunocompetent syngeneic mice but not in immunocompromised or Treg cell-depleted mice. Furthermore, CCL5 was directly trans-activated by cancer-FOXP3 and promoted the recruitment of Treg cells from peripheral blood to the tumor site in vitro and in vivo. This finding has been further reinforced by the evidence that Treg cells recruitment by cancer-FOXP3 was impaired by neutralization of CCL5, thereby inhibiting the growth of PDAC. In conclusion, cancer-FOXP3 serves as a prognostic biomarker and a crucial determinant of immunosuppressive microenvironment via recruiting Treg cells by directly trans-activating CCL5. Therefore, cancer-FOXP3 could be used to select patients with better response to CCL5/CCR5 blockade immunotherapy.
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MESH Headings
- Adult
- Aged
- Animals
- Carcinoma, Pancreatic Ductal/genetics
- Carcinoma, Pancreatic Ductal/immunology
- Carcinoma, Pancreatic Ductal/metabolism
- Carcinoma, Pancreatic Ductal/pathology
- Cells, Cultured
- Chemokine CCL5/metabolism
- Chemokine CCL5/pharmacology
- Chemotaxis, Leukocyte/drug effects
- Chemotaxis, Leukocyte/genetics
- Female
- Forkhead Transcription Factors/genetics
- Forkhead Transcription Factors/physiology
- Humans
- Lymphocyte Activation/drug effects
- Lymphocyte Activation/genetics
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Nude
- Mice, SCID
- Middle Aged
- Pancreatic Neoplasms/genetics
- Pancreatic Neoplasms/immunology
- Pancreatic Neoplasms/metabolism
- Pancreatic Neoplasms/pathology
- T-Lymphocytes, Regulatory/drug effects
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/metabolism
- Tumor Microenvironment/genetics
- Pancreatic Neoplasms
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Affiliation(s)
- X Wang
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - M Lang
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - T Zhao
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - X Feng
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - C Zheng
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - C Huang
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - J Hao
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - J Dong
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China
| | - L Luo
- Department of Gynaecology, Hepingqu Gynaecology and Obsterics Hospital, Tianjin, China
| | - X Li
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - C Lan
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - W Yu
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
| | - M Yu
- Department of Nutrition and Food Hygiene, School of Public Health, Tianjin Medical University, Tianjin, China
| | - S Yang
- Penn State College of Medicine, Hershey, PA, USA
| | - H Ren
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer; Key Laboratory of Cancer Prevention and Therapy, Department of Pancreatic Cancer, Tianjin, China
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Fourny N, Lan C, Kober F, Bernard M, Desrois M. Intolerance to glucose and abdominal obesity in a diet-induced metabolic syndrome model were associated with modification of cardiac morphology and impaired myocardial function. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30469-x] [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: 10/19/2022]
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Yu S, Yu H, Wu C, Lan C. 598 Ultraviolet B (UVB) induces development of early melanocytic progenitors via increased oxidative stress in vitro - Implications for use of oral antioxidants in UVB phototherapy for vitiligo treatment. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.637] [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: 10/21/2022]
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Yin SL, Lan C, Pei H, Zu ZQ. Continuous plasma filtration adsorption in treatment of severe infection-induced multiple organ dysfunction syndrome. J BIOL REG HOMEOS AG 2016; 30:471-476. [PMID: 27358134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Multiple organ dysfunction syndrome (MODS), a high-risk disease, has a fatality rate of 70%. To improve treatment of this disease, in recent years many scholars have explored the pathological and physiological changes of MODS. To observe the curative effect of continuous plasma filtration adsorption (CPFA) in the treatment of MODS, we selected 96 patients who were diagnosed with severe infection-induced MODS and were treated in the First Affiliated Hospital of Zhengzhou University between February 2012 and October 2014 and divided them into an observation group and a control group. Besides conventional treatment, the observation group was also given CFPA in combination with high volume hemofiltration (HVHF), while the control group only received HVHF. Changes of blood routine index, balance of electrolyte and acid-base as well as vital signs were observed before and after treatment. Also, blood, kidney and blood gas were examined. For all patients, tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and C-reactive protein (CRP) were recorded at the start of treatment (0 h), and 5 h and 10 h after treatment. It was found that both therapies could lower blood urea nitrogen (BUN) and creatinine levels and maintain balance of electrolyte and acid-base, but had no obvious influence on leukocyte, blood platelet and hematocrit. In the observation group, PaO(2)/FiO(2) and mean arterial pressure (MAP) were significantly improved after surgery (P less than 0.05), while Acute Physiology and Chronic Health Evaluation (APACHE) II score had an obvious decrease (P less than 0.05). In contrast, the control group was observed with insignificantly changed PaO(2)/FiO(2), MAP and APACHE II score (P>0.05). TNF-α, IL-6 and CRP levels of the two groups had no statistically significant difference at the start of treatment (P>0.05), but TNF-α, IL-6 and CRP levels of the observation group became remarkably lower than those of the control group 5 h and 10 h after treatment (P less than 0.05). Therefore, CPFA is proved to be safe and effective in treating patients with severe infection-induced MODS as it can lower the level of proinflammatory cytokines and improve the level of anti-inflammatory cytokines; thus, it is worthy of clinical promotion.
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Affiliation(s)
- S L Yin
- Emergency Department, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - C Lan
- Emergency Department, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - H Pei
- Emergency Department, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Z Q Zu
- Emergency Department, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Basik M, Aguilar-Mahecha A, Lafleur J, Bareke E, Przybytkowski E, Alirezaie N, Discepola F, Légaré S, Kovacina B, Lan C, Mihalcioiu CL, Robidoux A, Marcus E, Roy JA, Pelmus M, Aleynikova O, Nabavi S, Tonellato P, Majewski J. Abstract P6-03-03: The Q-CROC-3 project reveals novel genomic alterations in triple negative breast cancers in residual tumors after neoadjuvant chemotherapy. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p6-03-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
The prognosis of triple negative breast cancer that shows resistance and/or incomplete response to cytotoxic chemotherapy is poor. In order to understand the mechanisms of resistance to chemotherapy and the genomic evolution of TNBCs treated with chemotherapy, an international multi-center biopsy-driven clinical trial was created for the collection and study of drug-resistant primary and metastatic freshly frozen tumors (Q-CROC-03: NCT01276899). We consented 60 patients with operable TNBC undergoing neoadjuvant Anthracycline/Taxane-based chemotherapy for pre and post-treatment biopsies as well as collection of residual tumor at the time of surgery and serial blood sampling. In 12-15 patients, adequate residual tumor material was available for genomic studies, which included whole exome sequencing, array CGH, gene expression microarray profiling and RNAseq of paired tumors. Whole exome sequencing revealed clonal shifts as well as the relatively infrequent appearance of novel mutations in individual tumors, without any recurrently detected variants. Array CGH revealed a remarkable stability in the number of DNA copy number alterations with a few functional alterations enriched for in the residual tumor, including an amplicon involving the NFIB gene. Finally, gene expression profiling showed shifts towards the immune-modulatory and basal TNBC subtypes after chemotherapy as well as an increase in the expression of several targetable genes, including DUSP1, a dual specificity phosphatase. In the 4 cases of primary and matching metastatic tumors, the post-NAC residual tumor had acquired changes many of which persisted in the metastatic sites, indicating that the analysis of the residual tumors can provide a partial picture of genomic changes present in metastases but not in the primary tumor. In summary, the genomic characterization of residual post-NAC tumor tissue provides important information for the development of novel therapeutic strategies for drug-resistant TNBCs as well as a portrait of genomic evolution of TNBCs subjected to chemotherapy.
Citation Format: Basik M, Aguilar-Mahecha A, Lafleur J, Bareke E, Przybytkowski E, Alirezaie N, Discepola F, Légaré S, Kovacina B, Lan C, Mihalcioiu CL, Robidoux A, Marcus E, Roy J-A, Pelmus M, Aleynikova O, Nabavi S, Tonellato P, Majewski J. The Q-CROC-3 project reveals novel genomic alterations in triple negative breast cancers in residual tumors after neoadjuvant chemotherapy. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P6-03-03.
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Affiliation(s)
- M Basik
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - A Aguilar-Mahecha
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - J Lafleur
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - E Bareke
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - E Przybytkowski
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - N Alirezaie
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - F Discepola
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - S Légaré
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - B Kovacina
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - C Lan
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - CL Mihalcioiu
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - A Robidoux
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - E Marcus
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - J-A Roy
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - M Pelmus
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - O Aleynikova
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - S Nabavi
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - P Tonellato
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
| | - J Majewski
- Lady Davis Institute, Segal Cancer Center, Montreal, QC, Canada; McGill University Hospital Center, Montreal, QC, Canada; Center for Medical Bioinformatics, Harvard Medical School, Boston, MA; McGill University and Genome Quebec Innovation Center, Montreal, QC, Canada; Hopital du Sacre Coeur, Montreal, QC, Canada; Centre Hospitalier de l'Universite de Montreal, Montreal, QC, Canada; John H. Stroger Jr. Hospital, Chicago, IL; Jewish General Hospital, Montreal, QC, Canada
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Desrois M, Piccardo A, Zogheib E, Dalmasso C, Lan C, Fourré D, Cozzone P, Caus T, Bernard M. Heart Donation After Cardiac Death: Preliminary Study on an Isolated, Perfused Swine Heart After 20 Minutes of Normothermic Ischemia. Transplant Proc 2014; 46:3314-8. [DOI: 10.1016/j.transproceed.2014.04.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 04/22/2014] [Indexed: 10/24/2022]
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Chang KV, Chiu HH, Wang SS, Lan C, Chen SY, Chou NK, Wu MH, Lai JS. Cardiac rehabilitation in a pediatric patient with heart retransplantation. A single case study. Eur J Phys Rehabil Med 2014; 50:199-205. [PMID: 23486299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Cardiac rehabilitation (CR) after heart transplantation is known to benefit physical capacity in adults, but the advantages of CR on pediatric patients with heart retransplantation remain undetermined. AIM The purpose of the present study was to report the effect of structured CR for a boy receiving heart transplantations twice. DESIGN Single case study. SETTING Inpatient and outpatient rehabilitation department. POPULATION A pediatric patient underwent heart transplantation due to dilated cardiomyopathy at 13.6 year-old and retransplantation owing to severe cardiac allograft vasculopathy at 16.2 year-old. METHODS CR was arranged after both transplantations. Bicycle or treadmill exercises were conducted three times weekly with the intensity adjusted to the ventilatory threshold. Serial cardiopulmonary exercise tests were performed to evaluate the sequential cardiorespiratory function changes using the peak oxygen uptake (VO₂peak) as the primary outcome. RESULTS The patient had undergone 10 times of exercise tests during rehabilitation. The VO₂peak increased from 12.27 to 15.63 mL·kg-1·min-1 within 6 months after the primary transplantation. However, the VO₂peak dropped intensively after a rejection episode and failed to improve since the development of cardiac allograft vasculopathy. Following retransplantation, the VO₂peak appeared worse initially but increased gradually with rehabilitation. One year subsequent to retransplantation, the VO₂peak reached 17.7 mL·kg-1·min-1 with a 7.22 mL·kg-1·min-1 improvement compared with his baseline value. CONCLUSION Structured CR improves aerobic capacity of a pediatric patient with heart retransplantation. CLINICAL REHABILITATION IMPACT CR is safe and beneficial for pediatrics with heart retransplantation. Cardiopulmonary exercise testing can be considered as an adjuvant tool for detecting rejection or cardiac allograft vasculopathy in pediatric heart transplantation recipients.
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Diaz Z, Przybytkowski E, Lan C, McNamara S, Aguilar-Mahecha A, Camlioglu E, Gologan A, Batist G, Basik M. MC13-0077 Array CGH analysis of paired metastatic biopsies obtained pre-treatment and at resistance to FOLFOX-bevacizumab in metastatic CRC patients. Eur J Cancer 2013. [DOI: 10.1016/s0959-8049(13)70183-7] [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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Tu X, Chen AR, Biondini F, Ma RJ, Lan C. Application of digital photogrammetry in wind tunnel test for bridge model. The Imaging Science Journal 2013. [DOI: 10.1179/1743131x11y.0000000034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Hsu CJ, Chen SY, Su S, Yang MC, Lan C, Chou NK, Hsu RB, Lai JS, Wang SS. The effect of early cardiac rehabilitation on health-related quality of life among heart transplant recipients and patients with coronary artery bypass graft surgery. Transplant Proc 2012; 43:2714-7. [PMID: 21911151 DOI: 10.1016/j.transproceed.2011.04.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Accepted: 04/19/2011] [Indexed: 01/13/2023]
Abstract
PURPOSE To investigate the effect of an early postoperative outpatient cardiac rehabilitation program to health-related quality of life among heart transplantation recipients (HTR) and patients with coronary artery bypass graft (CABG) surgery. METHODS The study included 45 clinically stable HTR (age: 47 ± 14 years; 36 men, 9 women) and 34 patients with CABG (age: 57.2 ± 12.5 years; 27 men, 7 women). HTR started rehabilitation 70 ± 33 days after transplantation; patients with CABG started training 36 ± 18 days after surgery. Patients participated in a 12-week supervised exercise training program three times per week. Each training session comprised 10 minutes of warm-up, 25 to 30 minutes of cycling or treadmill walking, and 10 minutes of cooldown. The exercise intensity was set at 50% to 80% of peak oxygen uptake (V̇O(2peak)) according to the patient's condition. The health-related quality of life of subjects was evaluated by the Medical Outcomes Trust 36-item health survey (SF-36) at baseline and upon the completion of rehabilitation. RESULTS At baseline, the HTR group showed lower V̇O(2peak) than the CABG group, but the health-related quality of life was similar between the two groups. After training, both groups exhibited an increase of 3.6 mL·kg(-1)·min(-1) in V̇O(2peak) and improvement of physical component in health-related quality of life. The HTR group showed a significant increase of SF-36 scores in physical functioning (59.7 ± 18.9 to 77.0 ± 14.0), physical role (21.1 ± 34.1 to 38.3 ± 37.9), bodily pain (57.4 ± 24.3 to 73.6 ± 21.5), social functioning (63.6 ± 23.4 to 72.8 ± 22.1), emotional role (59.2 ± 43.7 to 76.3 ± 37.4), and mental health (67.1 ± 17.9 to 73.4 ± 14.6). The CABG group only exhibited increased scores in physical functioning (60.0 ± 22.9 to 73.4 ± 18.0), physical role (19.1 ± 24.9 to 27.9 ± 38.3), bodily pain (57.1 ± 20.0 to 70.3 ± 16.1), and social functioning (54.0 ± 21.3 to 69.9 ± 21.1). CONCLUSIONS Early postoperative cardiac rehabilitation significantly improved physical capacity and quality of life among heart transplant recipients and patients with CABG. Additionally, HTR showed greater improvement in health-related quality of life than patients with CABG regardless of lower physical capacity.
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Affiliation(s)
- C-J Hsu
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan
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Lan C, Li C, Yang M, Mei X, He Z, Chen W, Chen H, Yan B, Chen Q. Pretibial myxoedema with autoimmunity and hyperplasia treated with glucocorticoids and surgery. Br J Dermatol 2011; 166:457-9. [PMID: 21848686 DOI: 10.1111/j.1365-2133.2011.10580.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Desrois M, Caus T, Dalmasso C, Lan C, Cozzone PJ, Bernard M. Expression of the three nitric oxide synthase isoforms and nitric oxide level in the rat heart during cold storage and blood reperfusion. Cell Mol Biol (Noisy-le-grand) 2009; 55 Suppl:OL1208-OL1214. [PMID: 20018145] [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] [Received: 05/06/2009] [Accepted: 09/19/2009] [Indexed: 05/28/2023]
Abstract
Maintenance of nitric oxide (NO) homeostasis is an important concept for myocardial protection. Here, we have investigated the NO pathway by analysing total nitrate concentration (NOx) and NO synthase (NOS) isoforms expression as well as the myocardial integrity by lactate dehydrogenase and creatine kinase contents in the rat heart graft arrested by CRMBM solution, submitted to 3 hr cold ischemia in the same solution and 24 hr blood reperfusion following heterotopic abdominal heart transplantation. NOx level was similar to baseline value after ischemia and significantly increased after 24 hr reperfusion. NOS isoforms expression was highly modulated after cold ischemia followed by blood reperfusion. Endothelial NOS expression was decreased after ischemia but restored after 24 hr reperfusion. Neuronal NOS expression was drastically decreased after ischemia and 24 hr reperfusion. Inducible NOS protein was present only after 24 hr reperfusion. Cold ischemia induced a severe loss of creatine kinase without any modification after blood reperfusion. In conclusion, we show here that CRMBM solution did not increase NO production during ischemia but induced an enhanced synthesis of NO during reperfusion which may be related to restoration of endothelial NOS expression and/or induction of inducible NOS expression.
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Affiliation(s)
- M Desrois
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR CNRS, Faculté de Médecine de Marseille, Université de la Méditerranée, Marseille Cedex 05, France.
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Dowell J, Taub R, Lan C, Xie Y, Dunphy F, Blake V, Kindler H. A multicenter phase II study of pemetrexed (P), cisplatin (C), and bevacizumab (B) in patients (pts) with advanced malignant mesothelioma (MM). J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.7578] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7578 Background: Vascular endothelial growth factor (VEGF) is a key growth factor for MM. In pre-clinical models, anti-VEGF antibodies inhibit MM proliferation. Standard chemotherapy for MM, pemetrexed + cisplatin, yields a response rate of 41%, progression-free survival (PFS) of 5.7 months (mo) and median overall survival (OS) of 12.1 mo. We added the anti-VEGF antibody B to PC in an ongoing phase II multi-center study in MM pts. Methods: Eligible pts have unresectable, histologically-confirmed MM, no prior chemotherapy, and PS 0–1. Pts receive C 75 mg/m2, P 500 mg/m2 and B 15 mg/kg Q21 days for 6 cycles, then B Q21 days until progression. CT scans are obtained Q 2 cycles. Primary endpoint: Progression-fere survival (PFS). Correlative studies include IHC for the VEGF/KDR complex and PCR for simian virus 40 (sv40) T antigen. Results: 43 pts enrolled at 4 centers from 3/06 to 12/08; currently, 34 are evaluable for PFS and 36 for toxicity. Pt characteristics: male 88%; median age 66 (range 24–81); histology: epithelial 62%, sarcomatoid 15%, biphasic 20%, unknown 3%; site of origin: pleural 85%, peritoneal 12%, tunica vaginalis 3%; PS 0 32%, PS 1 68%; thrombocytosis (>400) 32%. Cycles administered 229 (median 4, range 1–18). Grade 3/4 toxicity (%pts): neutropenia 8%; anemia 0%; thrombocytopenia 3%; thrombosis 11%; hypertension 8%; vomiting 8%; mucositis 6%; CVA 3%; proteinuria 0%; perforation 0%. Partial response: 41%, stable disease: 35%. Median PFS: 5.6 mo (95% CI: 4.1, 7.2). Median OS 11.5 mo (95% CI: 9.4, 24). Conclusions: These data suggest that the addition of B to PC does not improve PFS when compared with historical controls of PC in advanced MM pts. Correlative studies evaluating the VEGF/KDR complex and sv40 T antigen are pending. [Table: see text]
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Affiliation(s)
- J. Dowell
- UT Southwestern, Dallas, TX; Columbia University, New York, NY; Duke University, Durham, NC; University of Chicago, Chicago, IL
| | - R. Taub
- UT Southwestern, Dallas, TX; Columbia University, New York, NY; Duke University, Durham, NC; University of Chicago, Chicago, IL
| | - C. Lan
- UT Southwestern, Dallas, TX; Columbia University, New York, NY; Duke University, Durham, NC; University of Chicago, Chicago, IL
| | - Y. Xie
- UT Southwestern, Dallas, TX; Columbia University, New York, NY; Duke University, Durham, NC; University of Chicago, Chicago, IL
| | - F. Dunphy
- UT Southwestern, Dallas, TX; Columbia University, New York, NY; Duke University, Durham, NC; University of Chicago, Chicago, IL
| | - V. Blake
- UT Southwestern, Dallas, TX; Columbia University, New York, NY; Duke University, Durham, NC; University of Chicago, Chicago, IL
| | - H. Kindler
- UT Southwestern, Dallas, TX; Columbia University, New York, NY; Duke University, Durham, NC; University of Chicago, Chicago, IL
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Mense SM, Sengupta A, Zhou M, Lan C, Bentsman G, Volsky DJ, Zhang L. Gene expression profiling reveals the profound upregulation of hypoxia-responsive genes in primary human astrocytes. Physiol Genomics 2006; 25:435-49. [PMID: 16507782 DOI: 10.1152/physiolgenomics.00315.2005] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Oxygen is vital for the development and survival of mammals. In response to hypoxia, the brain initiates numerous adaptive responses at the organ level as well as at the molecular and cellular levels, including the alteration of gene expression. Astrocytes play critical roles in the proper functioning of the brain; thus the manner in which astrocytes respond to hypoxia is likely important in determining the outcome of brain hypoxia. Here, we used microarray gene expression profiling and data-analysis algorithms to identify and analyze hypoxia-responsive genes in primary human astrocytes. We also compared gene expression patterns in astrocytes with those in human HeLa cells and pulmonary artery endothelial cells (ECs). Remarkably, in astrocytes, five times as many genes were induced as suppressed, whereas in HeLa and pulmonary ECs, as many as or more genes were suppressed than induced. More genes encoding hypoxia-inducible functions, such as glycolytic enzymes and angiogenic growth factors, were strongly induced in astrocytes compared with HeLa cells. Furthermore, gene ontology and computational algorithms revealed that many target genes of the EGF and insulin signaling pathways and the transcriptional regulators Myc, Jun, and p53 were selectively altered by hypoxia in astrocytes. Indeed, Western blot analysis confirmed that two major signal transducers mediating insulin and EGF action, Akt and MEK1/2, were activated by hypoxia in astrocytes. These results provide a global view of the signaling and regulatory network mediating oxygen regulation in human astrocytes.
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Affiliation(s)
- S M Mense
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York 10032, USA
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Desrois M, Caus T, Belles PM, Dalmasso C, Lan C, Cozzone PJ, Bernard M. Nitric oxide pathway after long-term cold storage and reperfusion in a heterotopic rat heart transplantation model. Transplant Proc 2006; 37:4553-5. [PMID: 16387168 DOI: 10.1016/j.transproceed.2005.10.105] [Citation(s) in RCA: 5] [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] [Received: 01/31/2005] [Indexed: 10/25/2022]
Abstract
Recent studies have suggested the involvement of the nitric oxide (NO) pathway in ischemia-reperfusion injury related to cardiac transplantation. Herein, we assessed the NO pathway by quantifying endothelial (e) and inducible (i) nitric oxide synthase (NOS) expression and total NOS activity in a rat heart transplant model during cold ischemia with Celsior cardioplegia and reperfusion. Experiments were performed using a modified Lewis-Lewis heterotopic abdominal heart transplantation with 3 or 6 hours of ischemia with or without 1 hour of blood reperfusion. NOS expression and activity were determined using Western blotting and colorimetric assays, respectively, on freeze-clamped hearts after ischemia without (n = 10) or with reflow (n = 12) compared with basal values. Hearts submitted to 3 hours of ischemia and 1 hour of reperfusion showed a postischemic rate pressure product of 5190 +/- 3047 mm Hg/min (reversible ischemia), but no contractility was observed after 6 hours of ischemia. eNOS protein levels were lower after 3 hours of ischemia compared with the basal value (P = .0005) and were further decreased after 6 hours of ischemia (P < .0001 versus basal value and P = .0018 versus 3 hours of ischemia). Reperfusion did not further decrease eNOS protein levels. iNOS protein was not detected in any condition. NOS activity was increased after 3 hours of ischemia versus basal value (P = .0065) but not after 6 hours of ischemia without any effect of reperfusion. We concluded that eNOS expression was altered during ischemia and the amplitude of the alteration depended on the duration of ischemia. Reversible ischemia was associated with increased NOS activity at the end of ischemia with no variation at reperfusion.
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Affiliation(s)
- M Desrois
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), Faculté de Médecine, Marseille Cedex, France
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Gerbi A, Bernard M, Gleize B, Coste TC, Maixent JM, Lan C, Paganelli F, Pieroni G. Dose dependent accretion of docosahexaenoic acid (DHA) in cardiac membranes of rats fed egg yolk powder enriched in DHA. Cell Mol Biol (Noisy-le-grand) 2004; 50:855-60. [PMID: 15672470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
We tested the hypothesis that enrichment of the diet with docosahexaenoic acid (DHA) enriched egg yolk powder could modify specifically the (n-3) fatty acids content of rat plasma, red blood cells and heart membranes. Dose-dependent effect of DHA was studied in rats supplemented during 4 weeks. Three groups of adult male rats, DHA10, DHA35 and DHA60 (n = 5 each), had their diet supplemented with 10 mg, 35 mg or 60 mg DHA/kg body weight/day, respectively. Fatty acid composition of membranes and plasma lipids were determined. A significant dose-dependent increase in DHA was observed in all three types of samples. Arachidonic acid (AA) levels did not change in heart and red blood cell membranes whereas it increased significantly in plasma with the DHA35 diet. These results contrast with that previously reported for fish oil supplementation where a decrease in AA levels was reported. Hence, DHA enriched egg yolk supplementation leads to a specific accretion of DHA without competition on AA status.
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Affiliation(s)
- A Gerbi
- INSERM, U476, Faculté de Médecine Timone, Université Aix-Marseille, 27 Boulevard Jean Moulin, 13385 Marseille, France
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Desrois M, Durrans A, Caus T, Lan C, Clarke K, Cozzone PJ, Bernard M. Modulation of the NO pathway during short or prolonged blood reperfusion following ischaemia in a heterotopic rat heart transplantation model. Transplant Proc 2004; 36:1280-2. [PMID: 15251312 DOI: 10.1016/j.transproceed.2004.05.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ischemia-reperfusion injury plays a major role in graft dysfunction following transplantation. Extensive research has demonstrated that nitric oxide (NO) plays a fundamental role to protect the heart against this injury. Consequently, we quantified NO synthase (NOS) isoform protein levels in a rat heart transplant model during short and prolonged reperfusion following ischemia. Experiments were performed using a modified Lewis to Lewis heterotopic abdominal heart transplantation with a total ischemic time of 3 hours followed by 1 or 24 hours of blood reperfusion (n = 12). Heart function, as represented by the rate pressure product, increased from 7912 +/- 489 to 27067 +/- 9982 mm Hg/min (mean +/- SEM, short vs prolonged reperfusion, P = .0027). NOS isoform protein levels determined using Western blotting of freeze-clamped hearts were compared to baseline values. eNOS protein levels were significantly lower during short reperfusion compared to the basal value (P = .0077) or to prolonged reperfusion (P = .004), returning to the basal value after 24 hours of reflow. iNOS protein was not detected in the basal condition or after 1 hour of reflow, but was present after 24 hours of reflow (P = .0001 vs basal value and 1-hour reflow). nNOS protein was 69% lower after 1 hour of reflow compared with the baseline value (P = .0001), it was not restored after 24 hours of reflow (P = .002). These results suggest involvement of the NO pathway in ischemia-reperfusion injury with distinctive roles of NOS isoforms during short and prolonged reperfusion following ischemia.
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Affiliation(s)
- M Desrois
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR CNRS 6612, Faculté de Médecine, Marseille, France
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Desrois M, Sciaky M, Lan C, Cozzone PJ, Bernard M. Preservation of amino acids during long term ischemia and subsequent reflow with supplementation of L-arginine, the nitric oxide precursor, in the rat heart. Amino Acids 2004; 24:141-8. [PMID: 12624746 DOI: 10.1007/s00726-002-0321-9] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We investigated whether L-arginine, used in heart preservation to limit endothelial damage, may influence the pool of amino acids during long term ischemia and reflow. Isolated isovolumic rat hearts (n = 23) were submitted to 8 h of hypothermic ischemia after cardioplegic arrest with the Centre de Résonance Magnétique Biologique et Médicale (CRMBM) solution with or without L-arginine (Arg and No Arg groups respectively). Hearts were freeze-clamped after ischemia (n = 11) or submitted to 60 min of reflow (n = 12) and freeze-clamped. Eight hearts were perfused aerobically for 20 min and freeze-clamped (No ischemia group). Addition of L-arginine to the CRMBM solution limited aspartate depletion and decreased lysine level at the end of ischemia. After reflow, L-arginine supplementation increased the pool of glutamate and arginine and limited the depletion of serine, asparagine, glycine and taurine. We conclude that adding L-arginine to the CRMBM cardioplegic solution during long term ischemia preserved the amino acids pool.
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Affiliation(s)
- M Desrois
- Centre de Résonance Magnétique Biologique et Médicale, UMR CNRS 6612, Faculté de Médecine de Marseille, Marseille, France
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Chen W, Wu K, Lin M, Tang L, Gu Z, Wang S, Lan C, Lan X, Li H, Huang M, Chen X, Sheng H. [A pilot study on malaria control by using a new strategy of combining strengthening infection source treatment and health education in mountainous areas of Hainan province]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 17:1-4. [PMID: 12563805] [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
AIM To explore a new malaria control strategy that fits current epiodemiological condition and coincides with modern medicine model and the principle of cost-benefit. METHODS The new strategy highlights the risk villages and risk population as the focal point and integrates health education with behavioral intervention. The main anti-malaria measures consists of carrying out health education in risk villages, giving mass drug administrations in risk population staying overnight in the mountain, following up malaria cases for implementing radical cure, but without using traditional residual spraying or impregnating bednets with insecticides. RESULTS After having adopted the new strategy and taken the control measures, the people's knowledge about malaria increased to a higher level and the indices of malaria reduced to a lower level. The rate of bednet-using in the population was increased from 26.8% to 72.6%. The annual parasite incidence (API) of malaria was declined from 3.5% in 1994 to 1.1% in 1996 and 0.8% in 1997, and the API of falciparum malaria was declined from 1.0% to 0.3% and 0.3% respectively in the townships at the same time. The parasite rate(PR) of malaria was declined from 7.2% in May, 1995 to 2.1% in November, 1996 and 1.2% in October, 1997 and the PR of falciparum malaria was declined from 1.2% in May, 1995 to 0.1% in October, 1997. The proportion of villages without malaria cases was increased from 18.6% in 1994 to 54.2% in 1997, and the number of risk villages with a malaria incidence above 5% was reduced from 14 to 2 at the same time. The ratio of cost/benefit was 1:2.4 in 1995-1996 and 1:4.4 in 1997, showing a better economic benefit. CONCLUSION The expectant result has been obtained, thereby providing new experience for the malaria control in the mountainous areas of Hainan Province.
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Affiliation(s)
- W Chen
- Hainan Provincial Institute of Tropical Diseases, Haikou 570203
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Abstract
Tai Chi Chuan (TCC) is a popular Chinese conditioning exercise, however, its exercise intensity remains controversial. The objective of this study was to determine the exercise intensity of Yang TCC by measuring heart rate (HR) responses and oxygen consumption (VO2) during practice. Fifteen men aged 39.9 +/- 9.5 yrs (range 26-56 yrs) participated in this study. Subjects had practiced classical Yang TCC for 5.8 +/- 2.4 years. HR responses and VO2 were measured during practice of TCC by using a K4 telemetry system. Blood lactate was measured before and immediately after TCC practice. Additionally, breath-by-breath measurement of cardiorespiratory function and sequential determination of blood lactate were performed during the incremental exercise of leg cycling. Measurements obtained during the TCC practice and exercise testing were compared to determine the exercise intensity of TCC. While performing TCC, the mean HR of subjects was 140 +/- 10 bpm, and the mean VO2 was 21.4 +/- 1.5 mL x kg(-1) min(-1). Compared with the data of the exercise test, the HR during practice was 58% of the heart rate range. Meanwhile, the VO2 during TCC practice was 55% of the VO2peak. Additionally, the level of blood lactate immediately after TCC practice was 3.8 mM, which reflected the level of lactate during TCC, approximated the onset of blood lactate accumulation (OBLA). The results demonstrate that TCC is an exercise with moderate intensity, and is aerobic in nature.
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Affiliation(s)
- C Lan
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei
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Desrois M, Caus T, Lan C, Sciaky M, Cozzone PJ, Bernard M. Comparative effects of Celsior and a new cardioplegic solution on function, energy metabolism, and intracellular pH during long-term heart preservation. Transplant Proc 2002; 34:1259-61. [PMID: 12072333 DOI: 10.1016/s0041-1345(02)02806-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- M Desrois
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR CNRS 6612, Faculté de Médecine de Marseille, Marseille, France
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Abstract
This study aims to describe the national incidence rate and characteristics of lower limb amputations (LLA) in 1997 from an island-wide database of the national health insurance programme in Taiwan. Some 117,647 discharge records from a sampled database (1 in 20) of the National Health Insurance Research Database were analysed. This study included records (n=171) containing LLA procedures. The LLA procedure rates were obtained by multiplying the number of identified procedures by 20 as the numerator and mid-year total population of Taiwan in 1997 as the denominator. Each procedure was further analysed according to the demographic characteristics of the patients, cause and level of amputation. Summarised gender ratios of LLA procedure rates were obtained by Poisson regression analysis. The crude LLA procedure rate was 18.1 per 100,000 population per year and the crude major LLA procedure rate was 8.8 per 100,000 population per year in Taiwan in 1997. The major cause of LLA procedures was peripheral vascular disease (72%), and the toe was most frequently amputated (48%). The LLA procedure rates, which increased logarithmically with age of patients, were significantly higher in men with a summarised male to female rate ratio of 1.65. The age-standardised LLA procedure rate in Taiwan was lower than that reported in the United States, Finland, the Netherlands, the United Kingdom (Leeds, Middlesborough, and Newcastle), but higher than Spain, Italy, and Japan. The trend of an increasing proportion of PVD-related LLA procedures will prompt the health professionals to develop strategies for LLA prevention.
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Affiliation(s)
- S Y Chen
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei.
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Abstract
OBJECTIVE To evaluate cutaneous microcirculatory function in geriatric Tai Chi Chuan (TCC) practitioners. DESIGN Case-control study. SETTING Community setting. PARTICIPANTS Ten elderly male TCC practitioners (mean age, 69.9 +/- 1.5 yr) and 10 sedentary men with matched age and body size (mean age, 67.0 +/- 1.0 yr). INTERVENTION The TCC group had practiced TCC for 11.2 +/- 3.4 years (mean +/- standard error of the mean), with an exercise frequency of 5.1 +/- 1.8 times weekly. Each session included 20 minutes of warm-up, 24 minutes of TCC practice, and 10 minutes of cool down. MAIN OUTCOME MEASURES A graded exercise test with gas analysis was conducted on a bicycle ergometer for each subject. Skin blood flow (SkBF), cutaneous vascular conductance, and skin temperature were measured at rest and during exercise testing. Plasma nitric oxide metabolite was analyzed before and immediately after exercise. RESULTS The TCC group had a 34% higher VO(2)peak than the control group; it also had a higher SkBF, cutaneous vascular conductance, and skin temperature than the control group at rest and during exercise; and it also had a higher level of plasma nitric oxide metabolite than the sedentary group at rest and after exercise. CONCLUSION Older TCC practitioners had higher cutaneous microcirculatory function during exercise than did their sedentary counterparts. Moreover, this change may be partially mediated by enhancement of nitric oxide release.
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Affiliation(s)
- J S Wang
- Department of Physical Therapy, Chang Gung University, Taipei, Taiwan.
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Caus T, Izquierdo M, Lan C, Le Fur Y, Confort-Gouny S, Cozzone PJ, Bernard M. Simultaneous study of metabolism and function following cardioplegic arrest: a novel method of evaluation of the transplanted heart in the rat. J Heart Lung Transplant 2001; 20:575-82. [PMID: 11343985 DOI: 10.1016/s1053-2498(01)00237-6] [Citation(s) in RCA: 6] [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: 10/17/2022] Open
Abstract
BACKGROUND Limitations of the isolated perfused rat heart model for heart preservation studies include short study time due to the lack of stability of the preparation. We aimed to develop a new experimental model based on heterotopic heart transplantation in the rat to achieve simultaneous (31)P magnetic resonance spectroscopy (MRS) and functional study of the transplanted heart during early and late blood reperfusion. METHODS Twenty-five Lewis rats underwent heterotopic abdominal isograft heart transplantation and were randomized in two groups. Hearts were harvested after cardioplegic arrest induced with Centre de Résonance Magnétique Biologique et Médicale (CRMBM) solution and then stored at 4 degrees C for a total ischemic time of 3 hours. Graft contractility measurement and simultaneous (31)P MRS were performed after 1 hour and 24 hours of blood reperfusion, respectively, in groups I (n = 12) and II (n =13). RESULTS Contractility improved during reperfusion. The mean rate pressure product plus or minus standard error of mean increased from 11,373 +/- 1,377 mm Hg/min in group I to 24,363 +/- 3,860 mm Hg/min in group II (P = 0.003), while mean dP/dtmax increased from 1,642 +/- 173 mm Hg/sec to 2,571 +/- 333 mm Hg/sec, respectively (p = 0.03). Simultaneously, both the phosphocreatine/adenosine triphosphate (ATP) and inorganic phosphate/ATP ratios decreased from group I to group II (p = 0.025 and p = 0.015, respectively), suggesting regeneration of the intracellular pool of ATP in group II. CONCLUSIONS Simultaneous functional and metabolic studies of the transplanted heart are feasible in rats. Improvement in contractility during late reperfusion is contemporary with significant changes in energetic metabolism. Our model should be useful for the further improvement of heart preservation, which may result in significant clinical progress.
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Affiliation(s)
- T Caus
- Centre de Résonance Magnétique Biologique et Médicale (CRMBM), UMR CNRS 6612, Faculté de Médecine de Marseille, 27 Bd Jean Moulin, 13005 Marseille, France
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Shu W, Zhang Z, Lan C. [Acid producing potential of a lead/zinc mine tailings at Lechang, Guangdong Province]. Huan Jing Ke Xue 2001; 22:113-7. [PMID: 11507895] [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: 02/21/2023]
Abstract
The acid producing potential of a Pb/Zn mine tailings at Lechang City, Guangdong Province were studied using both net acid generation (NAG) and net acid production potential (NAPP) methods. The pyritic and total sulfur contents of the tailings were 12.57% and 18.68% respectively. The NAG and NAPP values were H2SO4 220 kg.t-1 and 326 kg.t-1, and both the NAG and NAPP results indicated that the tailings had high acid forming potential. NAG was more accurate than NAPP in predicting acid forming potential of the tailings due to the uncompleted oxidization of pyritic sulfur. Analysis of samples from two profiles test indicated that the acidification major occurred on the surface (0-20 cm) of the tailings because of limited oxygen diffusion and had little effects on the tailings at lower horizons. pH values were negatively related to EC, indicated that the acid released accelerate dissolution of the solid matrix and increase in both cations and actions in solution, the extractable Pb, Zn, Cu and Cd at the acidifying tailings surface.
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Affiliation(s)
- W Shu
- State Key Laboratory for Biocontrol of School of Life Sciences, Zhongshan University, Guangzhou 510275, China
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Huang L, Lan C, Shu W. [Leaf decomposition of two species in a mangrove community in Futian of Shenzhen]. Ying Yong Sheng Tai Xue Bao 2001; 12:35-8. [PMID: 11813429] [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
Using litter bags, the authors studied the dynamics of dry weight and organic C, N and P of leaves of two species (Kandelia candel, Aegiceras corniculatum) in a mangrove community in Shenzhen during their decomposition in situ. Leaves of K. candel degraded more rapidly than those of A. corniculatum. For A. corniculatum, it needed 35 days to lose half initial ash-free dry weights (AFDW) of the leaves, while for K. candel, only 12 days. Despite the difference in loss rate of litter bags with the two species, the dynamics of organic C, N and P of leaf detritus followed the same pattern. During decomposition, the N concentration of leaf detritus of both species rose up sharply, and then decreased gradually from the peak. The P level declined slightly, and then rose up slowly. The concentration of C remained fairly constant throughout the experiment. No significant difference in decomposition rates of the leaves of A. corniculatum was found when they degraded at different positions along tidal gradient within the mangrove ecosystem.
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Affiliation(s)
- L Huang
- Zhongshan University, Guangzhou 510275
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Wu YJ, Chen SY, Lin MC, Lan C, Lai JS, Lien IN. Energy expenditure of wheeling and walking during prosthetic rehabilitation in a woman with bilateral transfemoral amputations. Arch Phys Med Rehabil 2001; 82:265-9. [PMID: 11239324 DOI: 10.1053/apmr.2001.19019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To compare the energy expenditure of locomotion by wheelchair with that required for prosthetic ambulation in a person with bilateral transfemoral (TF) amputations. DESIGN Observational, single patient, descriptive. SETTING An 80-meter long rectangular hallway in a rehabilitation unit. PATIENT A 41-year-old woman with bilateral TF amputations that were performed 79 days before her admission to the rehabilitation unit. MAIN OUTCOME MEASURES The oxygen uptake, oxygen cost, heart rate, speed, cadence, and stride length of walking measured during a 4-month course of prosthetic rehabilitation. Five locomotion conditions were evaluated: (1) wheelchair propulsion, (2) walking with short-leg prostheses (stubbies) and a walker, (3) long-leg prostheses and a walker, (4) long-leg prostheses without knee mechanism and axillary crutches, and (5) long-leg prostheses with right polycentric knee and left locked knee and axillary crutches. A portable and telemetric system was used to measure the metabolic parameters. An arm ergometry graded exercise test was performed at the end of rehabilitation. RESULTS Oxygen cost (range, 466%--707% of that of wheeling) and heart rate (range, 106%--116% of that of wheeling) were higher during walking with various combinations of prostheses and walking aids. The speed of prosthetic walking was only 24% to 33% of that of wheeling. Our patient preferred using a wheelchair to prosthetic walking after discharge. CONCLUSIONS People with bilateral TF amputations require very high cardiorespiratory endurance to fulfill the energy demand during prosthetic rehabilitation. The high energy cost of prosthetic walking will limit its application in daily activities.
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Affiliation(s)
- Y J Wu
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan, ROC
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Bernard M, Cabanes E, Baetz D, El Banani H, Lan C, Izquierdo M, Cozzone P, Feuvray D. Intracellular sodium in the ischemic and reperfused heart and its role in injury. MAGMA 2000; 11:5-6. [PMID: 11186986 DOI: 10.1007/bf02678480] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M Bernard
- Centre de Resonance Magnétique Biologique et Médicale (CRMBM), UMR CNRS 6612, Faculté de Médecine, Marseille, France.
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Caus T, Izquierdo M, Lan C, Le Fur Y, Confort-Gouny S, Cozzone PJ, Bernard M. In vivo functional and MRS metabolic evaluation of the heart graft; application to improvements of cardiac preservation. MAGMA 2000; 11:20-2. [PMID: 11186975 DOI: 10.1007/bf02678484] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- T Caus
- Centre de Résonance Magnétique Biologique el Médicale (CRMBM), UMR CNRS 6612, Faculté de Médecine de Marseille, France
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Chen W, Lee T, Lan C, Cheng C. Characterization of halotolerant rhizobia isolated from root nodules of Canavalia rosea from seaside areas. FEMS Microbiol Ecol 2000; 34:9-16. [PMID: 11053731 DOI: 10.1111/j.1574-6941.2000.tb00749.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Twelve nodule isolates from Canavalia rosea, an indigenous leguminous halophyte growing in the seaside areas of southern Taiwan, were effective symbionts for the original host and able to grow at NaCl concentrations up to 3-3.5% (w/v). The taxonomy of these isolates was investigated using a polyphasic approach, including phenotypic characteristics, banding patterns of total proteins from sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), genomic fingerprint patterns from random amplified polymorphic DNA (RAPD) analysis, pulsed-field gel electrophoresis (PFGE) analysis, amplified 16S rDNA restriction analysis (ARDRA), 16S rRNA gene sequencing, and nifH gene sequencing. Based on the SDS-PAGE, RAPD, PFGE and ARDRA results, the 12 isolates are highly diverse. The 16S rRNA and nifH gene sequences were determined for isolates with distinct ARDRA patterns and compared with other members of the rhizobial species. We propose these isolates should be classified into the genus Sinorhizobium and distinguished from the current species of this genus.
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Abstract
OBJECTIVE To evaluate the training effect of a Tai Chi Chuan (TCC) program on knee extensor muscular strength and endurance in elderly individuals. DESIGN Before-after trial. SETTING Community setting. PARTICIPANTS Forty-one community dwelling subjects aged 61.1 +/- 9.8 years undertook a TCC program. Nine dropped out during the study. Pretraining and posttraining measurements were obtained from 15 men and 17 women. INTERVENTION Subjects participated in a 6-month TCC program. Each session consisted of 20 minutes of warm-up, 24 minutes of structured TCC training, and 10 minutes of cool-down exercises. MAIN OUTCOME MEASURES Peak torque of dominant and nondominant knee extensors was tested at speeds of 60 degrees , 180 degrees , and 240 degrees/sec concentrically and eccentrically. Muscular endurance of the knee extensor was tested at the speed of 180 degrees /sec. RESULTS In the group of men, concentric knee extensor peak torque increased by 15.1% to 20.0% and eccentric peak torque increased by 15.1% to 23.7%. The group of women also showed increases, ranging from 13.5% to 21.8% in concentric peak torque, and 18.3% to 23.8% in eccentric peak torque. In addition, the knee extensor endurance ratio increased by 9.6% to 18.8% in the men and 10.1% to 14.6% in the women. CONCLUSION TCC training may enhance muscular strength and endurance of knee extensors in elderly individuals.
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Affiliation(s)
- C Lan
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei
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Desrois M, Sciaky M, Lan C, Cozzone PJ, Bernard M. L-arginine during long-term ischemia: effects on cardiac function, energetic metabolism and endothelial damage. J Heart Lung Transplant 2000; 19:367-76. [PMID: 10775818 DOI: 10.1016/s1053-2498(00)00063-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [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: 11/30/2022] Open
Abstract
BACKGROUND We have evaluated the addition of L-arginine, a precursor of nitric oxide, to a cardioplegic solution (named CRMBM) designed for long-term heart preservation. METHODS Isolated isovolumic-perfused rat hearts (n = 22) were arrested with the CRMBM solution either with (Arg) or without L-arginine (2 mmol/L) (Arg group, n = 12, vs control group n = 10), submitted to 8 hours of cold storage (4 degrees C) in the solution, and then reperfused for 60 minutes at 37 degrees C. In 11 hearts, we evaluated the quality of cardiac preservation with P-31 magnetic resonance spectroscopy and the measure of function and cellular integrity. Endothelium-dependent and independent vasodilatations were measured in 11 other hearts, using 5-hydroxytryptamine and papaverine to assess endothelial and smooth muscle function. RESULTS Adding L-arginine to the cardioplegic solution improved functional recovery during reflow, as shown by the rate pressure product (31% +/- 3% for control vs 47% +/- 3% for Arg, p = 0.003) together with higher coronary flow and diminished contracture. Purine release in coronary effluents during reperfusion was lower in the Arg group. During ischemia and reflow kinetics of intracellular pH and high-energy phosphates were similar in both groups. Coronary endothelium-dependent vasodilatation was similarly impaired in both groups, but smooth muscle was less altered with L-arginine. CONCLUSIONS As an additive to the CRMBM cardioplegic solution, L-arginine provides a protective effect for long-term heart preservation. Our data do not show coronary endothelial protection as the prominent mechanism.
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Affiliation(s)
- M Desrois
- Centre de Résonance Magnétique Biologique et Médicale, Marseille, France
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