19 results on '"CHEN, Xing-Wu"'
Search Results
2. High‐resolution Fast Ferroelectric Liquid Crystal Displays on Gen 4.5
- Author
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Yuan, Zhengnan, Zhao, Ying Ming, Pan, Su, Li, Yan Fen, Sun, Zhibo, Huo, Yipeng, Tseng, Man Chun, Lu, Lei, Vashchenko, Valerii, Srivastava, Abhishek Kumar, Chen, Xing Wu, Zhang, Xin, Zhang, Sheng Dong, Chen, Li Xuan, Kwok, Hoi Sing, Yuan, Zhengnan, Zhao, Ying Ming, Pan, Su, Li, Yan Fen, Sun, Zhibo, Huo, Yipeng, Tseng, Man Chun, Lu, Lei, Vashchenko, Valerii, Srivastava, Abhishek Kumar, Chen, Xing Wu, Zhang, Xin, Zhang, Sheng Dong, Chen, Li Xuan, and Kwok, Hoi Sing
- Abstract
A successful test of Ferroelectric Liquid Crystal Displays (FLCD) on Gen 4.5 is realized in this paper. A new polyimide (PI) that can replace Nylon 6 (N6) is synthesized and tested on the production line. This used to be the barrier in the commercialization of FLCD. Apart from that, a new FLC for mass production is synthesized. To investigate the surface energy and relative performance, various materials are compared. This proof of the feasibility on the production line is a significant step towards the commercialization of field-sequential-color high-resolution FLCDs.
- Published
- 2024
3. P‐96: Alignment Optimization on Gen. 4.5 G for High‐framerate Ultra‐high‐resolution Ferroelectric Liquid Crystal Displays.
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YUAN, Zheng-Nan, ZHAO, Ying-Ming, PAN, Su, LI, Yan-Fen, SUN, Zhi-Bo, HUO, Yi-Peng, TSENG, Man-Chun, LU, Lei, VASHCHENKO, Valerii, SRIVASTAVA, Abhishek Kumar, CHEN, Xing-Wu, ZHANG, Xin, ZHANG, Sheng-Dong, CHEN, Li-Xuan, and KWOK, Hoi-Sing
- Subjects
FERROELECTRIC liquid crystals ,LIQUID crystal displays ,MASS production ,SURFACE energy ,COMMERCIALIZATION - Abstract
We achieve high‐framerate (< 100 μs) high‐contrast‐ratio ferroelectric liquid crystal displays (FLCD) on Gen 4.5. Innovatively, a new polyimide (PI) that is suitable for ferroelectric liquid crystal (FLC) alignment is synthesized and tested on the production line. It replaces Nylon 6 (N6), which was the barrier to the commercialization of FLCD. Moreover, a new FLC is synthesized to match requirements in mass production. Additionally, various materials were studied to investigate the surface energy and relative performance. It is not only proof of the feasibility on the production line, but also a significant step towards the commercialization of field‐sequential‐color high‐resolution FLCDs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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4. 12‐1: High‐resolution Fast Ferroelectric Liquid Crystal Displays on Gen 4.5.
- Author
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YUAN, Zhengnan-Nan, ZHAO, Ying-Ming, PAN, Su, LI, Yan-Fen, SUN, Zhi-Bo, HUO, Yi-Peng, TSENG, Man-Chun, LU, Lei, VASHCHENKO, Valerii, SRIVASTAVA, Abhishek Kumar, CHEN, Xing-Wu, ZHANG, Xin, ZHANG, Sheng-Dong, CHEN, Li-Xuan, and KWOK, Hoi-Sing
- Subjects
FERROELECTRIC liquid crystals ,LIQUID crystal displays ,POLYIMIDES ,MASS production ,SURFACE energy - Abstract
A successful test of Ferroelectric Liquid Crystal Displays (FLCD) on Gen 4.5 is realized in this paper. A new polyimide (PI) that can replace Nylon 6 (N6) is synthesized and tested on the production line. This used to be the barrier in the commercialization of FLCD. Apart from that, a new FLC for mass production is synthesized. To investigate the surface energy and relative performance, various materials are compared. This proof of the feasibility on the production line is a significant step towards the commercialization of field‐sequential‐color high‐resolution FLCDs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
5. Global dynamics of a planar Filippov system with a regular-SN.
- Author
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LI Jia-Hao and CHEN Xing-Wu
- Subjects
BIFURCATION diagrams - Abstract
Copyright of Journal Of Sichuan University (Natural Sciences Division) / Sichuan Daxue Xuebao-Ziran Kexueban is the property of Editorial Department of Journal of Sichuan University Natural Science Edition and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
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6. Bioactivity and safety of chimeric switch receptor T cells in glioblastoma patients
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Peng-Fei Wang, Zhi-Xiong Lin, Jun-Xiu Guo, Zhong-Jun Li, Song Han, Wen Jin, and Chen-Xing Wu
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0301 basic medicine ,Adult ,Male ,medicine.medical_treatment ,Kaplan-Meier Estimate ,Immunotherapy, Adoptive ,Cell therapy ,03 medical and health sciences ,Interferon-gamma ,0302 clinical medicine ,In vivo ,medicine ,Humans ,Adverse effect ,Receptor ,Aged ,Receptors, Chimeric Antigen ,business.industry ,Brain Neoplasms ,Interleukin-6 ,Biological activity ,Immunotherapy ,Middle Aged ,Radiation therapy ,Clinical trial ,030104 developmental biology ,Treatment Outcome ,030220 oncology & carcinogenesis ,Cancer research ,Female ,Neoplasm Recurrence, Local ,business ,Glioblastoma - Abstract
Experimental evidence has shown that chimeric switch receptor T (CSR-T) cells, activated by binding programmed death-ligand 1 on the tumor cell surface, lead to tumor regression in experimental animals. In this phase I clinical study, we evaluated the safety and bioactivity of CSR-T cell therapy in 14 patients with recurrent glioblastoma who were unresponsive to surgical resection and standard radiotherapy. Patients who received 108 CSR-T cells either intravenously or intracranially showed an increase in the levels of IFN-gamma and IL-6, respectively, in peripheral blood or cerbrospinal fluid (CSF). Moreover, the number of T cells present in CSF significantly increased after the treatment. Patients did not show grade 3 or 4 adverse effects. The evidence of in vivo biological activity and lack of adverse effects of treatment with CSR-T cells suggest that such treatment can be subjected to further analysis to show the efficacy of this new treatment strategy in the treatment of cancers that are not responsive to traditional therapeutic regimens.
- Published
- 2019
7. COLLECTION OF MATERIALS of the International scientific-practical conference 'ORGANIC AGRICULTURE - THE BASIS OF PRODUCTION OF ECOLOGICALLY FRIENDLY PRODUCTS' (28-29 June 2018, Almalybak)
- Author
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LEI Jun-Jie, SAI Li Han, Sai, LIANG Yu-Chao, ZHANG Yong-Qiang, CHEN Xing-Wu, XUE Li-Hua, Ankhtuya Mijiddorj, Lantuu, Galt, Ninj Badam, Saljnikov, E., Cakmak, D., Stajkovic-Srbinovic, Olivera, Mrvic, Vesna, Sikiric, Biljana, Омбаев A., M., Humphries, A., Gan-Erdene, G., and Tsolmon A., P.
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- 2018
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8. Peritumoral edema on magnetic resonance imaging predicts a poor clinical outcome in malignant glioma
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Wen‑Long Tang, Shui‑Yuan Liu, Long Chen, Chen‑Xing Wu, Xian‑Xin Qiu, Zhi‑Xiong Lin, Guo‑Shi Lin, Jian‑Dong Zhang, and Chang-Fu Zhou
- Subjects
Cancer Research ,Pathology ,medicine.medical_specialty ,survival ,Glioma ,Edema ,peritumoral edema ,magnetic resonance imaging ,Medicine ,Pathological ,Univariate analysis ,medicine.diagnostic_test ,business.industry ,Proportional hazards model ,glioblastoma ,Cancer ,Magnetic resonance imaging ,Articles ,malignant glioma ,medicine.disease ,Oncology ,prognosis ,Radiology ,medicine.symptom ,business ,Chemoradiotherapy - Abstract
Peritumoral edema (PTE), one of the main characteristics of malignant glioma, is a significant contributor to the morbidity and mortality from glioma, however, a recent systematic review suggested that controversy remains with regard to its prognostic value. To further determine whether PTE was a potential prognostic factor on routine pre-operative magnetic resonance imaging (MRI) for malignant glioma, the association between survival and PTE was investigated in the present retrospective review of 109 patients with newly diagnosed supratentorial malignant glioma using MRI data from these routine scans. The Kaplan-Meier method was used to calculate overall survival (OS) in univariate analysis, and COX proportional hazards model was applied to evaluate the effect of pre-operative MRI features on OS in multivariate analysis. The PTE extent, edema shape, degree of necrosis, enhancement extent, pathological grade, patient age, Karnofsky performance status (KPS) and post-operative chemoradiotherapy were associated with OS in the patients with malignant glioma on univariate analysis. Multivariate analysis indicated that the extent of PTE and degree of necrosis shown by pre-operative MRI were independent predictors of OS, in addition to pathological grade, patient age, KPS and post-operative chemoradiotherapy. Moreover, patients with two unfavorable factors (major edema and severe necrosis) exhibited a poorer OS compared with the remainder. In summary, PTE and degree of necrosis, which are easily determined from routine MRI, can be useful for predicting a poor clinical outcome in patients with newly diagnosed malignant glioma.
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- 2015
- Full Text
- View/download PDF
9. Template effect on reconstruction of blue phase liquid crystal
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Hu, De‐Chun, primary, Li, Wei‐Huan, additional, Chen, Xing‐Wu, additional, Ma, Xiao‐Long, additional, Lee, Yung‐Jui, additional, and Lu, Jian‐Gang, additional
- Published
- 2016
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10. Research progress of cholesteric liquid crystals with broadband reflection characteristics in application of intelligent optical modulation materials
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Zhang, Lan-Ying, primary, Gao, Yan-Zi, additional, Song, Ping, additional, Wu, Xiao-Juan, additional, Yuan, Xiao, additional, He, Bao-Feng, additional, Chen, Xing-Wu, additional, Hu, Wang, additional, Guo, Ren-Wei, additional, Ding, Hang-Jun, additional, Xiao, Jiu-Mei, additional, and Yang, Huai, additional
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- 2016
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11. P-123: Reconstruction Research of Blue Phase Liquid Crystal
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Hu, De-Chun, primary, Li, Wei-Huan, additional, Chen, Xing-Wu, additional, Ma, Xiao-Long, additional, Lee, Yung-Jui, additional, and Lu, Jian-Gang, additional
- Published
- 2016
- Full Text
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12. Fractionated resection on low grade gliomas involving Broca's area and insights to brain plasticity
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Chen-xing, Wu, Song, Pu, Yi, Lin, Yong-zhi, Wang, Tao, Jiang, Jian, Xie, Miao, Wei, Xiao-li, Yi, and Xiao-yi, Wang
- Subjects
Adult ,Male ,Neuronal Plasticity ,Brain Neoplasms ,Humans ,Female ,Glioma ,Neuropsychological Tests ,Magnetic Resonance Imaging ,Frontal Lobe - Abstract
Recent advances on functional mapping have enabled us to conduct surgery on gliomas within the eloquent area. The objective of the article is to discuss the feasibility of a planned fractionated strategy of resection on low-grade gliomas (LGGs) involving Broca's area. We report the first surgical series of planned fractionated resections on LGGs within Broca's area, focusing on language functional reshaping.Four patients were treated with fractionated operations for LGGs involving Broca's area. All cases underwent conventional magnetic resonance (MR) scanning, language functional MR and diffusion tensor imaging (DTI) before operation. The resections were then performed on patients under awake anesthesia using intraoperative electrical stimulation (IES) for functional mapping. Pre- and post-operative neuro-psychological examinations were evaluated.Total resections were achieved in all cases as confirmed by the postoperative control MR. After transient language worsening, all patients recovered to normal 3-6 months later. Language functional MR scannings have shown language functional cortical and subcortical pathway reorganization (in the perilesion or contra-lateral hemisphere) after the operation. All patients returned to a normal socioprofessional life.By utilizing the dynamic interaction between brain plasticity and fractionated resections, we can totally remove the tumor involving Broca's structure without inducing permanent postoperative deficits and even improve the quality of life.
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- 2008
13. Peritumoral edema on magnetic resonance imaging predicts a poor clinical outcome in malignant glioma.
- Author
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CHEN-XING WU, GUO-SHI LIN, ZHI-XIONG LIN, JIAN-DONG ZHANG, LONG CHEN, SHUI-YUAN LIU, WEN-LONG TANG, XIAN-XIN QIU, and CHANG-FU ZHOU
- Subjects
- *
MAGNETIC fields , *MAGNETIC moments , *MAGNETIC resonance , *NUCLEAR spin , *MAGNETIC resonance imaging - Abstract
Peritumoral edema (PTE), one of the main characteristics of malignant glioma, is a significant contributor to the morbidity and mortality from glioma, however, a recent systematic review suggested that controversy remains with regard to its prognostic value. To further determine whether PTE was a potential prognostic factor on routine pre-operative magnetic resonance imaging (MRI) for malignant glioma, the association between survival and PTE was investigated in the present retrospective review of 109 patients with newly diagnosed supratentorial malignant glioma using MRI data from these routine scans. The Kaplan-Meier method was used to calculate overall survival (OS) in univariate analysis, and COX proportional hazards model was applied to evaluate the effect of pre-operative MRI features on OS in multivariate analysis. The PTE extent, edema shape, degree of necrosis, enhancement extent, pathological grade, patient age, Karnofsky performance status (KPS) and post-operative chemoradiotherapy were associated with OS in the patients with malignant glioma on univariate analysis. Multivariate analysis indicated that the extent of PTE and degree of necrosis shown by pre-operative MRI were independent predictors of OS, in addition to pathological grade, patient age, KPS and post-operative chemoradiotherapy. Moreover, patients with two unfavorable factors (major edema and severe necrosis) exhibited a poorer OS compared with the remainder. In summary, PTE and degree of necrosis, which are easily determined from routine MRI, can be useful for predicting a poor clinical outcome in patients with newly diagnosed malignant glioma. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
14. Peritumoral edema shown by MRI predicts poor clinical outcome in glioblastoma.
- Author
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Chen-Xing Wu, Guo-Shi Lin, Zhi-Xiong Lin, Jian-Dong Zhang, Shui-Yuan Liu, and Chang-Fu Zhou
- Subjects
- *
RETINOBLASTOMA , *EDEMA , *METABOLIC disorder treatment , *BODY fluid disorders , *MAGNETIC resonance imaging , *GLIOMAS , *PREOPERATIVE care , *GLIOBLASTOMA multiforme - Abstract
Background: Magnetic resonance imaging (MRI) plays an irreplaceable role in the preoperative diagnosis of glioma, and its imaging features are the base of making treatment decisions in patients with glioma, but it is still controversial whether peritumoral edema shown by MRI from preoperative routine scans are associated with patient survival. The aim of this study was to assess the prognostic value of preoperative MRI features in patients with glioblastoma. Methods: A retrospective review of 87 patients with newly diagnosed supratentorial glioblastoma was performed using medical records and MRI data from routine scans. The Kaplan-Meier method and COX proportional hazard model were applied to evaluate the prognostic impact on overall survival of pretreatment MRI features (including peritumoral edema, edema shape, necrosis, cyst, enhancement, tumor crosses midline, edema crosses midline, and tumor size). Results: In addition to patient age, Karnofsky performance status (KPS) and postoperative chemoradiotherapy, peritumoral edema extent and necrosis on preoperative MRI were independent prognostic indicator for poor survival. Furthermore, patients with two unfavorable conditions (major edema and necrosis) had a shorter overall survival compared with the remainder. Conclusions: Our data confirm that peritumoral edema extent and necrosis are helpful for predicting poor clinical outcome in glioblastoma. These features were easy to determine from routine MRI scans postoperatively and therefore could provide a certain instructive significance for clinical activities. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
15. Reconstruction Research of Blue Phase Liquid Crystal.
- Author
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Hu, De-Chun, Li, Wei-Huan, Chen, Xing-Wu, Ma, Xiao-Long, Lee, Yung-Jui, and Lu, Jian-Gang
- Subjects
IMAGE reconstruction ,POLYMERS ,LIQUID crystals - Abstract
The anchoring energy of blue phase polymer template containing different concentration of conventional polymer has been studied. The lower bound of polymer concentration to form the chiral three-dimensional template of blue phase is confirmed. And it was demonstrated that the template anchoring energy has a threshold value to reassemble the double twist cylinder structure of blue phase liquid crystal by either refilling same-handed chiral materials or reverse-handed chiral materials which may help to improve the driving capacity of the polymer stabilized blue phase liquid crystal. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
16. Peritumoral edema shown by MRI predicts poor clinical outcome in glioblastoma
- Author
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Jian-Dong Zhang, Guo-Shi Lin, Shui-Yuan Liu, Chen-Xing Wu, Chang-Fu Zhou, and Zhi-Xiong Lin
- Subjects
Adult ,Male ,medicine.medical_specialty ,Brain Edema ,Necrosis ,Surgical oncology ,Glioma ,Edema ,medicine ,Humans ,Cyst ,Survival rate ,Aged ,Neoplasm Staging ,Retrospective Studies ,medicine.diagnostic_test ,Proportional hazards model ,business.industry ,Brain Neoplasms ,Research ,Magnetic resonance imaging ,Retrospective cohort study ,Middle Aged ,medicine.disease ,Prognosis ,Magnetic Resonance Imaging ,Surgery ,Survival Rate ,Oncology ,Peritumoral edema ,Female ,Radiology ,medicine.symptom ,business ,Glioblastoma ,MRI ,Follow-Up Studies - Abstract
Background Magnetic resonance imaging (MRI) plays an irreplaceable role in the preoperative diagnosis of glioma, and its imaging features are the base of making treatment decisions in patients with glioma, but it is still controversial whether peritumoral edema shown by MRI from preoperative routine scans are associated with patient survival. The aim of this study was to assess the prognostic value of preoperative MRI features in patients with glioblastoma. Methods A retrospective review of 87 patients with newly diagnosed supratentorial glioblastoma was performed using medical records and MRI data from routine scans. The Kaplan-Meier method and COX proportional hazard model were applied to evaluate the prognostic impact on overall survival of pretreatment MRI features (including peritumoral edema, edema shape, necrosis, cyst, enhancement, tumor crosses midline, edema crosses midline, and tumor size). Results In addition to patient age, Karnofsky performance status (KPS) and postoperative chemoradiotherapy, peritumoral edema extent and necrosis on preoperative MRI were independent prognostic indicator for poor survival. Furthermore, patients with two unfavorable conditions (major edema and necrosis) had a shorter overall survival compared with the remainder. Conclusions Our data confirm that peritumoral edema extent and necrosis are helpful for predicting poor clinical outcome in glioblastoma. These features were easy to determine from routine MRI scans postoperatively and therefore could provide a certain instructive significance for clinical activities.
- Full Text
- View/download PDF
17. [Response of grain-filling properties and quality of winter wheat to drip irrigation in Xinjiang, China].
- Author
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Lei JJ, Zhang YQ, Chen XW, Zhang YH, Xue LH, Qiao X, and Wang ZM
- Subjects
- Biomass, China, Edible Grain, Water, Agricultural Irrigation, Triticum
- Abstract
To provide theoretical basis for the water-saving, high-yield and good quality cultivation techniques of drip-irrigated winter wheat, the wheat cultivar 'Xindong 22' was adopted as the test material, and five irrigation amounts including 3150 (W
1 ), 3900 (W2 ), 4650 (W3 ), 5400 (W4 ) and 0 (CK) m3 ·hm-2 were adopted to investigate effects of drip irrigation amount on grain filling dynamics and quality traits in 2012-2013 and 2013-2014 wheat growing seasons in Xinjiang. Results indicated that the grain-filling dynamics of drip-irrigated winter wheat in different treatments presented the "S" shape curve, and accorded with the Logistic model with high fitting degree. The fast increase period of wheat grain-filling was measured at 12-20 days after anthesis. The maximum filling rate (Vm ) increased at first and decreased later with the increase of drip irrigation amount, and was obtained in the treatment W3 in the two seasons, which was 2.16 g·d-1 and 2.59 g·d-1 , respectively. With the increase in drip irrigation amount, the bulk mass, protein content, flour extraction rate, wet gluten content, dough stability time, degree of softening, dough extension resis-tance and draw ratio of the drip-irrigated wheat firstly increased and decreased later, and the maxima of these indexes were measured in W3 . However, the water absorption rate and extensibility of dough initially decreased and then increased, and the minimum was obtained in the treatment of W3 . The sedimentation value increased gradually and the dough development time decreased progressively. Treatment W3 had the highest grain yield of 8913 kg·hm-2 in 2013 and 8602 kg·hm-2 in 2014, which was 25.0%, 14.8%, 4.4%, 35.6% and 12.4%, 2.8%, 1.1%, 33.0% higher than the treatments of W1 , W2 , W4 and CK in 2013 and 2014, respectively. In conclusion, drip irrigation of 4650 m3 ·hm-2 during the whole growing season of winter wheat could realize the target of high-yield and good quality in local natural condition.- Published
- 2017
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18. [The pathologic significance and ionic mechanism of injured airway epithelium induced transdifferentiation of airway fibroblasts].
- Author
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Chen XW and Xu J
- Subjects
- Cell Transdifferentiation, Cells, Cultured, Epithelial Cells cytology, Epithelium metabolism, Fibroblasts cytology, Humans, Transforming Growth Factor beta1 metabolism, Cell Differentiation, Epithelial Cells pathology, Fibroblasts pathology, Respiratory Mucosa pathology
- Abstract
Objective: To investigate the effects of injured airway epithelial cells on the transdifferentiation of sub-epithelial fibroblasts, thus addressing the mechanisms of characteristic airway remodeling in asthmatic airway., Methods: Human sub-epithelial fibroblasts (SEF) or SEF in collagen gels were co-cultured with culture dishes which containing or not containing bronchial epithelial cells (16HBE) for 4 days. The experiments were divided into 7 groups according to different treatment to 16HBE; Group A: culture dishes not containing 16HBE; Group B: culture dishes containing normal 16HBE; Group C: culture dishes containing 16HBE treated with mechanical scrape; Group D: culture dishes containing 16HBE treated with mechanical scrape plus LPS stimulation; Group E: culture dishes containing 16HBE pre-added with endothelin receptor A inhibitor (BQ123) followed by treatment with mechanical scrape plus LPS stimulation; Group F: culture dishes containing 16HBE pre-added with TGF-beta(1) neutralizing antibody followed by treatment with mechanical scrape plus LPS stimulation; Group G: culture dishes containing 16HBE pre-added with BQ123 plus TGF-beta(1) neutralizing antibody followed by treatment with mechanical scrape plus LPS stimulation. The expression of alpha-smooth muscle actin (alpha-SMA) in the SEF was assessed by immunofluorescence or Western blotting. The diameters of the collagen gels containing SEF (8 samples in each group) were measured. Moreover, SEF in group A, B or D were selected, and the dynamic changes of intracellular calcium concentration [Ca(2+)]i were observed (at least 6 cells were analyzed in each group) by laser co-focal microscopy in the transdifferentiated SEF in response to the stimulation of the supernatant of 16HBE treated with mechanical scrape plus LPS stimulation for 24 h., Results: alpha-SMA expression in SEF was most abundant in group D compared with other groups. Relative contraction percentage was also significantly higher in group D [(53 +/- 8)%] than that in group B [(10 +/- 10)%], group C [(24 +/- 8)%], group E [(36 +/- 9)%], group F [(37 +/- 3)%] or group G [(31 +/- 7)%], respectively (F = 24.80, 38.10, all P < 0.01). Increased fluorescence intensity of [Ca(2+)]i was observed in the SEF stimulated with the supernatant of the injured 16HBE in all groups, which was significant in group D (F = 16.60, 8.97; all P < 0.01)., Conclusions: Injured airway epithelial cells induced the transdifferentiation of SEF towards alpha-SMA-expressing and elevated contractile myofibroblasts, in which both ET-1 and TGF-beta(1) may play crucial roles. The supernatant of injured airway epithelial cells-induced influx of [Ca(2+)]i may be an early signal for initiating the increased contractility in the transdifferentiated SEF.
- Published
- 2007
19. [Effects of airway epithelium injury on the transdifferentiation of sub-epithelial fibroblasts and its role in the development of airway hyperresponsiveness in asthma].
- Author
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Chen XW and Xu J
- Subjects
- Actins metabolism, Asthma metabolism, Cell Line, Transformed, Cell Proliferation, Cell Transdifferentiation, Coculture Techniques, Endothelin-1 metabolism, Epithelial Cells cytology, Epithelial Cells metabolism, Humans, Lipopolysaccharides pharmacology, Mitogen-Activated Protein Kinase 3 antagonists & inhibitors, Mitogen-Activated Protein Kinase 3 metabolism, Peptides, Cyclic pharmacology, Phosphorylation, Protein Kinase Inhibitors pharmacology, Respiratory Mucosa metabolism, Transfection, Transforming Growth Factor beta1 antagonists & inhibitors, Transforming Growth Factor beta1 metabolism, p38 Mitogen-Activated Protein Kinases antagonists & inhibitors, p38 Mitogen-Activated Protein Kinases metabolism, Asthma pathology, Cell Differentiation, Fibroblasts cytology, Respiratory Mucosa pathology
- Abstract
Objective: To address the possible role of injured airway epithelium in initiating transdifferentiation of sub-epithelial fibroblasts into myofibroblasts and accelerating cell proliferation in sub-epithelial fibroblasts, which may be involved in airway hyperresponsiveness in asthma., Methods: Human primary cultured sub-epithelial fibroblasts were co-cultured with human bronchial epithelial cells (16HBE) which were treated with lipopolysaccharide (LPS) plus mechanical scratch prior to co-culture. The procedure was also performed in the presence or absence of endothelin (ET) receptor A inhibitor (BQ123), transforming growth factor-beta(1) (TGF-beta(1)) neutralized antibody, respectively or simultaneously, followed by immunostaining, Western blotting and bromodeoxyuridine (BrdU) incorporation respectively to detect alpha-SMA expression and cell proliferation in the co-cultured sub-epithelial fibroblasts. Using the inhibitors specific for mitogen-activated protein kinases (MAPKs) pathways, the role of MAPKs pathways in activating the expression of alpha-SMA was evaluated. In addition, the interaction between matrix metalloproteinases (MMPs) and ET-1 was investigated by cell transfection with anti-ET-1 converting enzyme (anti-ECE) mRNA expression plasmid followed by gelatin zymography analysis., Results: 16HBE treated with LPS plus mechanical injury induced alpha-SMA expression in sub-epithelial fibroblasts and accelerated BrdU incorporation in the cells. BQ123, TGF-beta(1) neutralized antibody, specific inhibitors for p38 MAPK and extracellular signal-regulated kinase 1/2 (ERK1/2) were able to block the induction respectively to a certain extent. Phosphorylated p38 MAPK and ERK1/2 were detected in the sub-epithelial fibroblasts 10 min after being co-cultured with injured 16HBE. Compared to normal control (16HBE transfected with pEGFPN(2)) or those cells transfected with anti-ECE mRNA expression plasmids, ET-1 released from the 16HBE cells transfected with pEGFPN(2) into supernatants were increased significantly after the treatment described as above: 16HBE pre-transfected with pEGFP-N(2) expression plasmid before being treated with mechanical scrape plus LPS stimulation: (15.00 +/- 0.86) pg/ml; 16HBE pre-transfected with anti-ECE expression plasmid before being treated with mechanical scrape plus LPS stimulation: (7.57 +/- 0.94) pg/ml (all P < 0.01). At the same time, the activities of MMP-2 and MMP-9 were enhanced., Conclusions: Injured airway epithelial cells induced the transdifferentiation of sub-epithelial fibroblasts into myofibroblasts, which may be mediated by ET-1 and TGF-beta(1) through MARKs pathways such as p38 MAPK and ERK 1/2.
- Published
- 2005
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