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Zhu MH, Zhao QL, Sun YK, Song E. [Experimental study on the therapeutic effect and mechanism of erlotinib on non-proliferative diabetic retinopathy]. Zhonghua Yan Ke Za Zhi 2023; 59:906-918. [PMID: 37936359 DOI: 10.3760/cma.j.cn112142-20230210-00053] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Objective: To investigate the therapeutic effect and mechanism of erlotinib, an epidermal growth factor receptor (EGFR) inhibitor, on non-proliferative diabetic retinopathy (NPDR). Methods: An experimental research was conducted. Human retinal Müller cells (RMC) were MIO-M1 cells from Moorfields Ophthalmology Hospital and the Institute of Ophthalmology at London University College. MIO-M1 cells were divided into normal, hypertonic, high glucose, high glucose+dimethyl sulfoxide (DMSO), high glucose+erlotinib 0.5 mmol/L, high glucose+erlotinib 1 mmol/L, and high glucose+erlotinib 2 mmol/L groups using a random number table method. Detection of the effect of erlotinib on the proliferation of MIO-M1 cells under high glucose conditions was performed by 5-ethynyl-2'-deoxyuridine (EdU) method. Western blotting (WB) was used to detect the effect of erlotinib on the activation markers of glial fibrillary acidic protein (GFAP) and glutamine synthetase (GS) protein levels in MIO-M1 cells under high glucose conditions. WB was used to detect the effect of erlotinib on the protein levels of nerve growth factor receptor (p75NTR), vimentin, and cell retinol binding protein (CRALBP) in RMC under high glucose conditions. MIO-M1 cells were divided into normal group, high glucose group, high glucose+DMSO group, and high glucose+erlotinib (1 mmol/L) group using random number table method. The effect of erlotinib on EGFR nuclear translocation under high glucose conditions was detected by cell immunofluorescence staining. Immunoprecipitation was used to detect the effect of erlotinib on the interaction between EGFR and transcription intermediate factor 2 (TIF2) in MIO-M1 cells under high glucose conditions. MIO-M1 cells were randomly divided into normal group, high glucose group, high glucose+DMSO group, high glucose+Myc-DDK empty body group, high glucose+erlotinib group, high glucose+erlotinib+human doublet protein group, high glucose+erlotinib+TIF2 plasmid group, and high glucose+erlotinib+human doublet protein+TIF2 plasmid group. Cell immunofluorescence staining was used to detect the effect of erlotinib on the binding of EGFR and TIF2 in MIO-M1 cells under high glucose conditions through the EGFR/TIF2 axis. Quantitative reverse transcription polymerase chain reaction (qRT-PCR) was used to detect the regulatory effect of EGFR and TIF2 binding on cyclin D1 transcription in MIO-M1 cells under high glucose conditions. The mouse model of diabetes retinopathy (DR) was constructed and divided into normal group, DR group, DR+DMSO group, DR+erlotinib 0.25 mg·kg-1·d-1 group, DR+erlotinib 0.5 mg·kg-1·d-1 group and DR+erlotinib 1 mg·kg-1·d-1 group. 25 mice in total, 5 in each group. Tissue immunofluorescence staining was used to detect the expression of RMC activation marker GFAP. The FITC-dextran injection experiment was used to detect the effect of erlotinib on retinal vascular leakage in a murine DR model. Results: Compared with the normal group (32.4%±3.0%), the proportion of EdU positive cells in RMC in the high glucose group (59.2%±3.8%) increased (P<0.001). Compared with the high glucose group (59.2%±3.8%), the proportion of EdU positive cells in the high glucose+1 mmol/L erlotinib group (37.6%±4.4%) decreased (P<0.001). Compared with the normal group, the expression of GFAP in RMC in the high glucose group increased (1 in the normal group, 2.27±0.11 in the high glucose group, P<0.001), while the expression of GS decreased (1 in the normal group, 0.32±0.03 in the high glucose group, P<0.001). 1 mmol/L erlotinib treatment reduced the expression of GFAP in RMC under high glucose conditions (1.32±0.13 and 2.27±0.11, respectively; P<0.001), and increased the expression of GS (0.71±0.06 and 0.32±0.03, respectively; P<0.001). The colocalization of EGFR and DAPI in RMC of the high glucose+1 mmol/L erlotinib group was lower than that of the high glucose group (52.2%±4.1% and 76.4%±5.7%, respectively; P<0.001). The expression of TIF2 or EGFR both increased while using EGF or TIF2 antibodies to precipitate TIF2 or EGFR under high glucose conditions compared to the normal group (1 in the normal group, 2.27±0.20 in the high glucose group, 2.17±0.21 in the EGFR, all P<0.05). And the expression of TIF2 (1.38±0.10) or EGFR (1.32±0.13) in the high glucose+erlotinib group was lower than that in the high glucose group (2.27±0.20) and the high glucose group (2.17±0.21) (all P<0.05). The colocalization of EGFR and TIF2 (17.2%±3.9%) and the mRNA level of Cyclin D1 (1.32±0.16) in the RMC of the high glucose+erlotinib group were lower than those in the high glucose group (54.6%±3.7% of EGFR and TIF2 colocalization ratio, 2.58±0.19 of Cyclin D1 mRNA level,all P<0.05). The high glucose+erlotinib+AREG (EGFR agonist) group, high glucose+erlotinib+Myc DDK-TIF2 plasmid group and high sugar+erlotinib+AREG+Myc-DDK-TIF2 plasmid group EGFR colocalization with TIF2 (colocalization ratios 24.1%±1.9%, 26.0%±2.3%, 35.3%±2.5%) and TIF2 mRNA levels (1.71±0.16, 1.72±0.18, 2.20±0.18). Compared with the high glucose+erlotinib group, The increases were statistically significant (all P<0.05). Compared to the normal group, the expression of GFAP in mouse retina tissue was increased in the DR group (1 in the normal group, 3.07±0.19 in the DR group, P<0.001), and 0.5 mg·kg-1·d-1 erlotinib (1.73±0.30) significantly reduced the expression of GFAP in the retina of DR group mice (P<0.05). Compared to the normal group (3.97±0.47), the DR group (23.13±2.15) showed an increase in fluorescein leakage, while the DR+erlotinib group (11.66±1.45) showed a significant decrease in leakage compared to the DR group (all P<0.05). Conclusions: Erlotinib inhibits the proliferation and activation of RMC induced by high glucose, inhibits the entry of EGFR into the nucleus, inhibits the binding of EGFR to TIF2 in RMC, and reduces the transcription of Cyclin D1 in RMC by inhibiting the interaction between EGFR and TIF2. At the same time, erlotinib inhibits the proliferation and activation of RMC in the mouse DR model, ameliorating retinal vascular leakage in mice. These results suggest that erlotinib inhibits the activation and proliferation of RMC by downregulating the EGFR/TIF2/Cyclin D1 pathway under high glucose conditions, thereby alleviating the progression of NPDR.
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Affiliation(s)
- M H Zhu
- Lixiang Eye Hospital of Soochow University, Suzhou 215123, China
| | - Q L Zhao
- Lixiang Eye Hospital of Soochow University, Suzhou 215123, China
| | - Y K Sun
- Lixiang Eye Hospital of Soochow University, Suzhou 215123, China
| | - E Song
- Lixiang Eye Hospital of Soochow University, Suzhou 215123, China
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Li J, Guo ZB, Tang K, Wan XL, Yang Y, Ni HJ, Zhu MH, Guo FL, Liu WH. [Clinical outcomes of endovascular therapy in acute stroke patients with anterior circulation tandem occlusions due to atherosclerosis and dissection]. Zhonghua Nei Ke Za Zhi 2023; 62:1317-1322. [PMID: 37935498 DOI: 10.3760/cma.j.cn112138-20230121-00032] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Objective: To compare the clinical outcomes of endovascular therapy in acute stroke patients with anterior circulation tandem occlusions caused by atherosclerosis or dissection. Methods: A retrospective cohort study. A total of 98 patients with anterior circulation tandem lesions undergoing endovascular therapy in the Wuhan NO.1 Hospital (March 2016 to March 2022) were analyzed. Median age was 64(55,71) years old, and 82.7% (81/98 cases) were males. According to the lesion etiology, the patients were divided into atherosclerosis and dissection groups. The differences in clinical outcomes between the two groups were investigated, including favorable 90-day functional outcome (modified Rankin Scale score of 0-2), successful reperfusion (modified Thrombolysis in Cerebrovascular Infarction score of 2b-3), symptomatic intracranial hemorrhage, stroke-associated pneumonia, 90-day all-cause mortality, and average hospitalization days. Logistic regression analysis was used to adjust for potential confounders affecting functional outcomes in both groups, and to determine odds ratios and 95% confidence intervals. Results: Seventy-one patients were grouped into the atherosclerotic cause and 27 into the dissection cause cohorts. The rate of favorable 90-day functional outcome was 43.7% (31/71 cases) in the atherosclerosis group versus 55.6% (15/27 cases) in the dissection group (adjusted odds ratio=1.339; 95% confidence interval, 0.374-4.798; P=0.654). No significant differences were found in other clinical outcomes between the two groups (all P>0.05). Conclusion: The clinical prognosis of patients with tandem lesions caused by atherosclerotic stenosis or artery dissection was similar after endovascular therapy. Future studies are still needed to verify our results.
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Affiliation(s)
- J Li
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - Z B Guo
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - K Tang
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - X L Wan
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - Y Yang
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - H J Ni
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - M H Zhu
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - F L Guo
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
| | - W H Liu
- Department of Neurology, Wuhan No.1 Hospital, Wuhan 430022, China
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Chen YC, Wang QM, Chen L, Zhu MH, Zhang J. [Arf6 regulates endometriotic epithelial-mesenchymal transition and mitochondrial distribution]. Zhonghua Fu Chan Ke Za Zhi 2022; 57:442-448. [PMID: 35775252 DOI: 10.3760/cma.j.cn112141-20220126-00050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the role of adenosine diphosphate ribosylation factor 6 (Arf6) in the pathogenesis of endometriosis. Methods: Endometrial tissues were sampled from women who were hospitalized in the Affiliated Hospital of Medical School of Ningbo University and Ningbo Women and Children's Hospital from November 2020 to May 2021 with endometriosis (n=44, endometriosis group) and without endometriosis (n=17, control group). The expression of Arf6 protein in the endometrial tissues was detected by western blot. Endometrial epithelial cells from both groups were primary cultured and the distribution of intracellular mitochondria was detected by immunofluorescence. The expression of Arf6 protein was down-regulated by small interference RNA (siRNA), the distribution of mitochondria in cells with decreased Arf6 protein expression was observed, and the expression of mitochondria-related proteins development and differentiation enhancing factor 1 (DDEF1, also called AMAP1), reactive oxygen species 1 (ROS1) and epithelial-mesenchymal transition (EMT)-related proteins E-cadherin, vimentin were detected. Transwell assay was used to detect the changes in the migration ability of the cells. Results: Compared with the control group, ectopic endometrial tissue of endometriosis group showed high expression of Arf6 protein (0.174±0.019 vs 0.423±0.033; t=29.630, P<0.01); and in ectopic endometrial epithelial cells, mitochondria were distributed near the edge of the cell membrane. While Arf6 expression was down-regulated by siRNA, the distribution of mitochondria in ectopic cells returned to natural, close to the control level. In addition, the expression levels of AMAP1 and ROS1 in ectopic cells after Arf6 protein knockdown were significantly decreased. Transwell assay results indicated that knockdown of Arf6 could reduce the migration ability of ectopic epithelial cells [migration cell count: (34.3±7.5) cells]; and immunofluorescence verified low expression of E-cadherin but high expression of vimentin in ectopic epithelial cells, whereas knockdown of Arf6 protein E-cadherin expression increased but vimentin expression decreased. Conclusions: High expression of Arf6 protein in ectopic endometrial epithelial cells leads to the distribution of mitochondria tending to membrane marginalization, while inducing EMT, which are involved in the mechanism of endoheterosis pathogenesis.
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Affiliation(s)
- Y C Chen
- Department of Obstetrics and Gynecology, Ningbo Women and Children's Hospital, Ningbo 315012, China
| | - Q M Wang
- Department of Obstetrics and Gynecology, Ningbo Women and Children's Hospital, Ningbo 315012, China
| | - L Chen
- Department of Obstetrics and Gynecology, Ningbo Women and Children's Hospital, Ningbo 315012, China
| | - M H Zhu
- Department of Obstetrics and Gynecology, the Affiliated Hospital of Medical School of Ningbo University, Ningbo 315020, China
| | - J Zhang
- Department of Obstetrics and Gynecology, Ningbo Women and Children's Hospital, Ningbo 315012, China
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Li M, Zheng HL, Chen SC, Zhu MH, Jiang H, Liu F, Gao YN, Wang W, Zhang CY, Chen MJ. [Clinical analysis of selective laryngeal reinnervation using upper root of phrenic nerve and hypoglossal nerve branch in the treatment of bilateral vocal fold paralysis]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2020; 55:1016-1021. [PMID: 33210879 DOI: 10.3760/cma.j.cn115330-20200526-00444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the airway and voice quality improvement in patients with bilateral vocal fold paralysis (BVFP) who underwent selective laryngeal reinnervation surgery. Methods: From January 2012 to December 2016, a retrospective study was conducted in 39 patients with BVFP who underwent selective laryngeal reinnervation surgery in Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University. All patients were examined by videostroboscopy, vocal function assessment, laryngeal electromyography and pulmonary function test before and after the surgery, and followed up for at least 2 years to evaluate the efficacy and safety of the surgery.Wilcoxon signed rank test was used to analyze the G score and VHI-10 score data. Paired t-test was used to analyze acoustic parameters, MPT values and pulmonary function parameters. Results: Postoperative infection and hemorrhage occurred in one patient separately.Videostroboscopic videos showed that at 4-8 months postoperatively, vocal folds in 35 patients achieved moderate or severe abduction during inspiration, 2 patients only achieved mild abduction, 2 patients showed no abduction,while all patients achieved adduction in bilateral vocal cords during phonation. The recovery rate of moderate-to-severe abduction was 89.7% (35/39), and these patients were decannulated successfully. At 12 months after operation, G score and VHI-10 score were significantly lower than those before operation (P<0.05), and the acoustic parameters jitter, shimmer, HNR and MPT were significantly improved (P<0.05). Most of the parameters of the pulmonary function test at 3 months postoperatively returned to the normal reference level, while the maximum inspiratory pressure (PImax) at 12 months after operation was still slightly lower than the normal level, but it was significantly improved compared with preoperative value (P<0.05). The EMG data at 12 months postoperatively showed full interference potentials in 37 patients in bilateral posterior cricoarytenoid muscles during inspiration, and full interference potentials in bilateralthyroarytenoid muscles during phonation. Obvious misdirected regeneration electric activitieswere found in two of them. Potentials in posterior cricoarytenoid muscle were weak in 2 cases with poor abduction. During long-term follow-up, only one case showed decreased abduction, but did not affect respiratory function. Conclusions: The selective laryngeal reinnervation procedure applied in the present study can restore physiological motion of vocal cords. The success rate was high, the curative effect was stable, and the complications were rare. It is worth of promotion.
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Affiliation(s)
- M Li
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - H L Zheng
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - S C Chen
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - M H Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - H Jiang
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - F Liu
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - Y N Gao
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - W Wang
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - C Y Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
| | - M J Chen
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Navy Medical University, Shanghai 200433, China
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Hou R, Hui XY, Xu GJ, Yang X, Wang HG, Xu N, Liu YL, Zhu MH, Zhou HZ. [Clinical observation of three-dimensional printing donor tooth model in peri-operative period of autotransplantation of tooth]. Zhonghua Kou Qiang Yi Xue Za Zhi 2020; 55:647-653. [PMID: 32878400 DOI: 10.3760/cma.j.cn112144-20200204-00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To prepare a three-dimensional (3D) printing donor tooth model and to observe its application in the peri-operative period. Methods: In part one, 192 cases (2017.9-2019.8) from Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University [107 males and 85 females, age (34.2±10.7) years] which need autotransplantation of teeth (ATT) were collected. Whether the donor teeth can be completely extracted was predicted through clinical and imaging examination (first prediction). The second prediction was supplemented by the three-dimensional printing model of the donor teeth. Each of the prediction was compared with the actual results and the coincidence rate was calculated. In part two, 64 cases (2017.9-2019.8) from Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University [28 males, 36 females, age (30.2±8.3) years] which need ATT were randomly divided into the model group and the donor group. The time of alveolar fossa preparation, time of donor tooth in vitro, times of trial implantation and time of pulptomy and root canal location were recorded respectively. Results: In part one, the coincidence rate between the second prediction and the actual results [97.4%(187/192)] was significantly higher than that of the first prediction [93.2%(179/192)] (P<0.05). In part two, the preparation time of the alveolar fossa in the maxillary and mandibular were (18.8±4.6) and (22.7±3.4) min, the time of the teeth in vitro were (3.0±0.6) and (2.1±0.6) min, the times of trial implantation were (1.3±0.8) and (1.0±0.9), and the time of pulpotomy and root canal location were (4.3±0.6) and (4.0±0.5) min. All values in the model groups were better than those in the donor group (P<0.05). Conclusions: The 3D printing model is accurate. It can be used in autogenous tooth transplantation to shorten the preparation time of alveolar fossa and time of donor tooth in vitro, and reduce the times of trial implantation of donor teeth, and to help to improve the prediction accuracy of complete extraction of donor teeth and the time of pulpotomy and root canal location.
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Affiliation(s)
- R Hou
- Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - X Y Hui
- Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - G J Xu
- Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - X Yang
- Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - H G Wang
- Department of Operative Dentistry & Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
| | - N Xu
- Department of Operative Dentistry & Endodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
| | - Y L Liu
- Department of General Dentistry and Emergency, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Xi'an 710032, China
| | - M H Zhu
- Department of General Dentistry and Emergency, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Xi'an 710032, China
| | - H Z Zhou
- Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
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Zhu QJ, Liang J, Xu CL, Wu X, Zhu MH, Ma L, Li MY, Ma QH, Song E. [Quantification of optical coherence tomographic angiography images in type 2 diabetic patients]. Zhonghua Yan Ke Za Zhi 2019; 55:273-279. [PMID: 30982289 DOI: 10.3760/cma.j.issn.0412-4081.2019.04.009] [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: 06/09/2023]
Abstract
Objective: To quantify optical coherence tomographic angiography (OCTA) images and to explore potential clinical values of each parameter in diabetic patients. Methods: A case-control and cross-sectional study of diabetic (129 eyes) and healthy (32 eyes) subjects was conducted. 3-mm OCTA scan, fundus photography and best corrected visual acuity measurement were performed. Image-pro plus was used to calculate microvascular and foveal avascular indices in nonsegmented and segmented OCTA images. Intraclass correlation coefficient and relative standard deviation were used to examine the reliability, reproducibility and accuracy. Correlation of each parameter was calculated, and so was the area under the receiver operating characteristic curve. Results: Vessel density (VD) of diabetic patients measured in the nonsegmented retinal layer (RL) and superficial retinal layer (SRL) was 49.146%±6.097%, 44.038%±5.641%, respectively, significantly lower than healthy subjects 52.212%±6.250%, 46.698%±5.417% (t=2.534, 2.405; P=0.012, 0.017), and vessel length (VL) was (19.905±2.285)mm, (17.596±2.149)mm, (14.479±2.091)mm in the three layers, which was significantly shorter than that in the healthy control group (21.037±2.185)mm, (18.739±1.994)mm, (15.343±2.266)mm (t=2.529, 2.731, 2.059; P=0.012, 0.007, 0.041). Compared with non-diabetes, foveal avascular zone (FAZ) in diabetes was (0.441±0.167)mm(2), larger compared to health eyes 0.352±0.109mm(2) (t=-2.831, P=0.005). FAZ demonstrated a negative correlation with VD and VL in RL or SRL(r=-0.227, -0.338; P<0.05) (r=-0.241, -0.332; P<0.05), while best corrected visual acuity showed a negative correlation with VL in each layer (r=-0.225, -0.201, -0.250; P=0.01, 0.022, 0.004), and VD in DRL (r=-0.197, P=0.026). All parameters showed high reproducibility between graders(intraclass correlation coefficient>0.965), while relative standard deviation was greater than 3.049%. AR had the highest area under the receiver operating characteristic curve (0.737), compared with AI (0.724). Conclusions: Our study demonstrates good reliability, reproducibility and accuracy of quantification of OCTA images and reveals changes of VD, VL and FAZ in diabetes, which may occur earlier than vision impairment. AR and AL may have great values in prompting early diabetic retinopathy in diabetic patients. (Chin J Ophthalmol, 2019, 55:273-279).
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Affiliation(s)
- Q J Zhu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, 215021, China
| | - J Liang
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, 215021, China
| | - C L Xu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, 215021, China; The First Hospital of Jilin University, Changchun 130000, China
| | - X Wu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, 215021, China
| | - M H Zhu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, 215021, China
| | - L Ma
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, 215021, China
| | - M Y Li
- Suzhou Gusu District Health And Family Planning Bureau, Suzhou 215000, China
| | - Q H Ma
- The Third People's Hospital of Xiangcheng District, Suzhou 215131, China
| | - E Song
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, 215021, China
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Chen W, Zhang Y, Cheng Y, Wang ZY, Wu MH, Zhu MH, Chen DH, Zheng HL. [The role of NF-κB signaling pathway in laryngeal leukoplakia recurrent with laryngeal reflux]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 53:597-603. [PMID: 30121998 DOI: 10.3760/cma.j.issn.1673-0860.2018.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the mechanism of vocal mucosal barrier damage mediated by NF-κB and NF-κB-regulated signaling pathway via probing the expression of inflammatory factors and essential proteins for node of NF-κB signaling pathway. Methods: The patients suffering from vocal leukoplakia accompanied with larygopharyngeal reflux(LPR) were treated with oral administration of proton pump inhibitor(PPI). Mucosal specimens of vocal cord were collected from all patients before PPI treatment. And the mucosal specimens of vocal cord were collected from the patients with suspected recurrence at 8 weeks after PPI treatment. HE staining was used to observe the histopathological changes of the mucosa. ELISA was utilized to detect the levels of inflammatory factors including tumor necrosis factor(TNF)-α, interleukin(IL)-1 and IL-6. Western blot was used to detect the expression of p-p65, p-IKK and p-IκB. Immunofluorescence method was adopted to detect the entrance of p65 to cell nucleus.Data was analyzed by SPSS 23.0 software. Results: In PPI untreated group, the expressions of IL-1β, TNF-α and IL-6 in the specimens of 8 weeks after operation were not different significantly from those obtained during operation.But in the PPI-treated group, the expressions were down-regulated.The expression of p-p65 in the middle and high grade heterogenous hyperplasia group was higher than that of low level heterogenous hyperplasia group.The difference of p65 and p-p65 expression between 8 weeks after surgery and surgery in PPI-untreated group was statistically insignificant (P>0.05). The difference of p65 expression between PPI-treated group and PPI pre-treatment group was statistically insignificant (P>0.05). The expression of p-p65 in the PPI-treated group was lower than that of the PPI pre-treatment group (P<0.05). The expressions of IL-1β, TNF-α and IL-6 were positively related with that of NF-κB-p65. Immun of luorescence method revealed the entrance of p65 to cell nucleus in PPI pre-treatment group, which meant that NF-κB was activated. In the PPI-treated group, few activated p65 could be observed in the cell nucleu. Conclusion: The possible mechanism of vocal mucosal barrier damage in vocal leukoplakia accompanied with LPR maybe the vocal mucosal inflammation mediated by NF-κB and NF-κB-regulated signaling pathway activated with refluxed materials.
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Affiliation(s)
- W Chen
- Department of Otorhinolaryngology Head and Neck Surgery, PLA Nanjing General Hospital, Nanjing 210002, China
| | - Y Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, PLA Nanjing General Hospital, Nanjing 210002, China
| | - Y Cheng
- Department of Otorhinolaryngology Head and Neck Surgery, PLA Nanjing General Hospital, Nanjing 210002, China
| | - Z Y Wang
- Department of Otorhinolaryngology Head and Neck Surgery, PLA Nanjing General Hospital, Nanjing 210002, China
| | - M H Wu
- Department of Otorhinolaryngology Head and Neck Surgery, PLA Nanjing General Hospital, Nanjing 210002, China
| | - M H Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - D H Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - H L Zheng
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
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8
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Min MK, Zhu MH, Zheng HL. [Recent advances in early diagnosis of head and neck cancer in precision medicine era]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1770-1774. [PMID: 29798197 DOI: 10.13201/j.issn.1001-1781.2017.22.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Indexed: 11/12/2022]
Abstract
Head and neck squamous cell carcinoma, HNSCC, has high morbidity and mortality. Even in America, more than 1/2 to 2/3 patients have been diagnosed at advanced stage. So, it's urgent to find ways to diagnose HNSCC earlier and foresee the curative effect. With the achievement of Next-Generation Sequencing, researchers are trying to develop early diagnostic technology from a new perspective, such as personal genomics, proteomics, metabolomics and other related personal information. Here we reviewed the recent research in early diagnosis of HNSCC.
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Affiliation(s)
- M K Min
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University
| | - M H Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University
| | - H L Zheng
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University
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Chen DH, Zheng HL, Zhang CY, Li M, Liu F, Zhu MH, Chen SC. [Coblation and silicon stent implantation for recurrent laryngeal papilloma with extensive lesions]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1711-1715. [PMID: 29798181 DOI: 10.13201/j.issn.1001-1781.2017.22.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Indexed: 11/12/2022]
Abstract
Objective:To evaluate the feasibility and long-term outcome of radiofrequency coblation combined with silicon stent implantation in the treatment of recurrent laryngeal papilloma with extensive lesions. Method:From March 2009 to April 2016, a total of 13 patients (8 males, 5 females; aged 28-67 years) who suffered recurrent laryngeal papilloma were enrolled in this retrospective study. All the cases had undergone at least one operation at other hospitals before this hospitalization. The recurrence interval (RI) of these cases ranged from 2 to 6 months. Video-laryngoscopy or stroboscopy were preformed preoperatively and postoperatively, as well as vocal function assessment. These cases underwent radiofrequency coblationin combination of different stent implantation (member, 7 cases; tube, 4 cases; T-shaped tube, 2 cases) under general anesthesia. The follow-up was 12 to 76 months. Result:Laryngoscopy revealed that the lesions mainly located in the vocal folds, anterior commissure, ventricular band, posterior commissure, epiglottis and even in subglottic area. Varying extent of mucosal adhesion of anterior or/and posterior commissure were observed in all cases, and two cases suffered mild subglottic tracheal stenosis. Two to six weeks after surgery, the silicon stent were removed and no mucosal adhesion were found except for 2 cases who suffered mucosal adhesion of anterior commissure again. Compared to preoperative scores, VHI-10 and G scores showed the significant improvement of voice quality postoperatively in all cases. The recurrence of papilloma was observed in 3 cases during 1-year follow-up, and 4 cases during 2-year follow-up, no recurrence in 6 cases. These recurrence lesions mainly located in ventricular band, subglottic area and trachea. However, no recurrence occurred in these cases who received ablation again. No serious complications were observed in these cases. Conclusion:Radiofrequency ablation may be an effective approach in the treatment of recurrent laryngeal papilloma with extensive lesions. One-stage application of suitable silicon stents can effectively prevent the adhesion of the wound and the onset oflaryngo-tracheal stenosis, and improve the quality of voice.
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Affiliation(s)
- D H Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
| | - H L Zheng
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
| | - C Y Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
| | - M Li
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
| | - F Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
| | - M H Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
| | - S C Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, 200433, China
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10
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Cobine CA, Hannah EE, Zhu MH, Lyle HE, Rock JR, Sanders KM, Ward SM, Keef KD. ANO1 in intramuscular interstitial cells of Cajal plays a key role in the generation of slow waves and tone in the internal anal sphincter. J Physiol 2017; 595:2021-2041. [PMID: 28054347 DOI: 10.1113/jp273618] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [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: 10/14/2016] [Accepted: 12/16/2016] [Indexed: 12/13/2022] Open
Abstract
KEY POINTS The internal anal sphincter develops tone important for maintaining high anal pressure and continence. Controversy exists regarding the mechanisms underlying tone development. We examined the hypothesis that tone depends upon electrical slow waves (SWs) initiated in intramuscular interstitial cells of Cajal (ICC-IM) by activation of Ca2+ -activated Cl- channels (ANO1, encoded by Ano1) and voltage-dependent L-type Ca2+ channels (CavL , encoded by Cacna1c). Measurement of membrane potential and contraction indicated that ANO1 and CavL have a central role in SW generation, phasic contractions and tone, independent of stretch. ANO1 expression was examined in wildtype and Ano1/+egfp mice with immunohistochemical techniques. Ano1 and Cacna1c expression levels were examined by quantitative PCR in fluorescence-activated cell sorting. ICC-IM were the predominant cell type expressing ANO1 and the most likely candidate for SW generation. SWs in ICC-IM are proposed to conduct to smooth muscle where Ca2+ entry via CavL results in phasic activity that sums to produce tone. ABSTRACT The mechanism underlying tone generation in the internal anal sphincter (IAS) is controversial. We examined the hypothesis that tone depends upon generation of electrical slow waves (SWs) initiated in intramuscular interstitial cells of Cajal (ICC-IM) by activation of Ca2+ -activated Cl- channels (encoded by Ano1) and voltage-dependent L-type Ca2+ channels (encoded by Cacna1c). Phasic contractions and tone in the IAS were nearly abolished by ANO1 and CavL antagonists. ANO1 antagonists also abolished SWs as well as transient depolarizations that persisted after addition of CavL antagonists. Tone development in the IAS did not require stretch of muscles, and the sensitivity of contraction to ANO1 antagonists was the same in stretched versus un-stretched muscles. ANO1 expression was examined in wildtype and Ano1/+egfp mice with immunohistochemical techniques. Dual labelling revealed that ANO1 expression could be resolved in ICC but not smooth muscle cells (SMCs) in the IAS and rectum. Ano1, Cacna1c and Kit gene expression were the same in extracts of IAS and rectum muscles. In IAS cells isolated with fluorescence-activated cell sorting, Ano1 expression was 26.5-fold greater in ICC than in SMCs while Cacna1c expression was only 2-fold greater in SMCs than in ICC. These data support a central role for ANO1 and CavL in the generation of SWs and tone in the IAS. ICC-IM are the probable cellular candidate for ANO1 currents and SW generation. We propose that ANO1 and CavL collaborate to generate SWs in ICC-IM followed by conduction to adjacent SMCs where phasic calcium entry through CavL sums to produce tone.
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Affiliation(s)
- C A Cobine
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - E E Hannah
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - M H Zhu
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - H E Lyle
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - J R Rock
- Department of Anatomy, UCSF School of Medicine, San Francisco, CA, 94143, USA
| | - K M Sanders
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - S M Ward
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - K D Keef
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
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11
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Gao YN, Zheng HL, Zhang CY, Chen SC, Li M, Chen DH, Zhu MH. [Comparing the free fasciocutaneous flap with free jejunium in reconstruction for hypopharyngeal and cervical esophageal defects]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1455-1458. [PMID: 29871115 DOI: 10.13201/j.issn.1001-1781.2016.18.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Indexed: 06/08/2023]
Abstract
Objective:To investigate the application of the reconstruction methods for hypopharyngeal and cervical esophageal defects due to the resection of hypopharyngeal cancer and advanced laryngeal cancer between free fasciocutaneous flaps and free jejunium transfer.We compared the superiorities and inferiorities of these two reconstruction methods. Method:Retrospective review of the archives of 56 patients from 2000 to 2010 who underwent pharyngoesophageal reconstruction with free flaps (n=32) or free jejunal transfer(n=24),comparison of indications,complications, hospitalization duration, swallowing function recovery and postoperative survival time. Result:The overall 3 year survival rate of free flap group and free jejunal transfer group was 59.3%,55.7% respectively; the overall 5 year survival rate was 38.5%,37.1% respectively. The overall rate of complication rate was 18.8%, 16.7% respectively. The patients with free flaps had higher incidence rate of fistula and scarring in the donor site and lower incidence rate of hues and stricture than the ones with free jejunal transfers. The mean hospitalization duration was (15.00±7.06) days and(13.00±6.75) days. The mean time of first oral food intake was(13.00±5.83)days and (11.00±6.67) days. The differences between two groups had no statistical significance(P>0.05). Conclusion:Free flaps and free jejunium transfer are the two most common reconstruction methods for the hypopharyngeal and cervical esophageal defects. Each has its own advantages and disadvantages respectively. We should choose reconstruction method according to the site and extent of the hypopharyngeal and cervical esophageal defects, preoperative and postoperative radiotherapy requirement.
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Affiliation(s)
- Y N Gao
- Department of Otorhinolaryngology Head and Neck Surgery,Changhai Hospital of the Second Military Medical University,Shanghai,200433,China
| | - H L Zheng
- Department of Otorhinolaryngology Head and Neck Surgery,Changhai Hospital of the Second Military Medical University,Shanghai,200433,China
| | - C Y Zhang
- Department of Otorhinolaryngology Head and Neck Surgery,Changhai Hospital of the Second Military Medical University,Shanghai,200433,China
| | - S C Chen
- Department of Otorhinolaryngology Head and Neck Surgery,Changhai Hospital of the Second Military Medical University,Shanghai,200433,China
| | - M Li
- Department of Otorhinolaryngology Head and Neck Surgery,Changhai Hospital of the Second Military Medical University,Shanghai,200433,China
| | - D H Chen
- Department of Otorhinolaryngology Head and Neck Surgery,Changhai Hospital of the Second Military Medical University,Shanghai,200433,China
| | - M H Zhu
- Department of Otorhinolaryngology Head and Neck Surgery,Changhai Hospital of the Second Military Medical University,Shanghai,200433,China
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12
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Cai Y, Huang JY, Wu HA, Zhu MH, Goddard WA, Luo SN. Tensile Strength of Liquids: Equivalence of Temporal and Spatial Scales in Cavitation. J Phys Chem Lett 2016; 7:806-810. [PMID: 26885747 DOI: 10.1021/acs.jpclett.5b02798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
It is well known that strain rate and size effects are both important in material failure, but the relationships between them are poorly understood. To establish this connection, we carry out molecular dynamics (MD) simulations of cavitation in Lennard-Jones and Cu liquids over a very broad range of size and strain rate. These studies confirm that temporal and spatial scales play equivalent roles in the tensile strengths of these two liquids. Predictions based on smallest-scale MD simulations of Cu for larger temporal and spatial scales are consistent with independent simulations, and comparable to experiments on liquid metals. We analyze these results in terms of classical nucleation theory and show that the equivalence arises from the role of both size and strain rate in the nucleation of a daughter phase. Such equivalence is expected to hold for a wide range of materials and processes and to be useful as a predictive bridging tool in multiscale studies.
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Affiliation(s)
- Y Cai
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China , Hefei, Anhui 230027, P. R. China
| | - J Y Huang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China , Hefei, Anhui 230027, P. R. China
| | - H A Wu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China , Hefei, Anhui 230027, P. R. China
| | - M H Zhu
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University , Chengdu, Sichuan 610031, P. R. China
| | - W A Goddard
- Materials and Process Simulation Center, California Institute of Technology , Pasadena, California 91125, United States
| | - S N Luo
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University , Chengdu, Sichuan 610031, P. R. China
- The Peac Institute of Multiscale Sciences , Chengdu, Sichuan 610031, P. R. China
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13
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Zhao F, Wang L, Fan D, Bie BX, Zhou XM, Suo T, Li YL, Chen MW, Liu CL, Qi ML, Zhu MH, Luo SN. Macrodeformation Twins in Single-Crystal Aluminum. Phys Rev Lett 2016; 116:075501. [PMID: 26943543 DOI: 10.1103/physrevlett.116.075501] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Indexed: 06/05/2023]
Abstract
Deformation twinning in pure aluminum has been considered to be a unique property of nanostructured aluminum. A lingering mystery is whether deformation twinning occurs in coarse-grained or single-crystal aluminum at scales beyond nanotwins. Here, we present the first experimental demonstration of macrodeformation twins in single-crystal aluminum formed under an ultrahigh strain rate (∼10^{6} s^{-1}) and large shear strain (200%) via dynamic equal channel angular pressing. Large-scale molecular dynamics simulations suggest that the frustration of subsonic dislocation motion leads to transonic deformation twinning. Deformation twinning is rooted in the rate dependences of dislocation motion and twinning, which are coupled, complementary processes during severe plastic deformation under ultrahigh strain rates.
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Affiliation(s)
- F Zhao
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People's Republic of China
| | - L Wang
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - D Fan
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - B X Bie
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
- School of Science, Wuhan Univiersity of Technology, Wuhan, Hubei 430070, People's Republic of China
| | - X M Zhou
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - T Suo
- School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Y L Li
- School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - M W Chen
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, People's Republic of China
| | - C L Liu
- Institute of Fluid Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - M L Qi
- School of Science, Wuhan Univiersity of Technology, Wuhan, Hubei 430070, People's Republic of China
| | - M H Zhu
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People's Republic of China
| | - S N Luo
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People's Republic of China
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14
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Cao XY, Liu J, Lian ZR, Clayton M, Hu JL, Zhu MH, Fan DM, Feitelson M. Differentially expressed genes in hepatocellular carcinoma induced by woodchuck hepatitis B virus in mice. World J Gastroenterol 2001; 7:575-8. [PMID: 11819834 PMCID: PMC4688678 DOI: 10.3748/wjg.v7.i4.575] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- X Y Cao
- Institute of Digestive Diseases, Xijing Hospital, Xi'an 710033, Shaanxi Province, China.
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15
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Cao XY, Liu J, Lian ZR, Clayton M, Hu JL, Zhu MH, Fan DM, Feitelson M. Cloning of differentially expressed genes in human hepatocellular carcinoma and nontumor liver. World J Gastroenterol 2001; 7:579-82. [PMID: 11819835 PMCID: PMC4688679 DOI: 10.3748/wjg.v7.i4.579] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2001] [Revised: 05/11/2001] [Accepted: 05/18/2001] [Indexed: 02/06/2023] Open
Affiliation(s)
- X Y Cao
- Institute of Digestive Diseases, Xijing Hospital, Xi'an 710033, Shaanxi Province, China.
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16
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Zhu MH, Zeng Y, Jiang L, Huang PH, Wu ZS, Fu XZ, Wang DQ, Lu JW. [Experimental safety study using rats and mice irradiated with the complex field cure instrument]. Zhongguo Yi Liao Qi Xie Za Zhi 2000; 24:29-32. [PMID: 12583110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The complex field cure instrument is a new medical instrument. The complex field is composed of several sorts of physical quantum fields. Mice and rats are continuously irradiated by the complex field for 20 days to 90 days. The result shows that WBC, Hb and PLT value of the animals irradiated with the instrument are more than the control group, and their biochemical index is normal. The internal organs of the experimental animals show no toxicity. The visceval coefficient (liver, spleen) of the experimental animals is more than the control group. The marrow micronucleas test is negative. The chromosome test show no distortion. All of the results have proved that the instrument produces no toxicity side effect. Application of the instrument is safe and reliable and it may increase immune function of the body.
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Affiliation(s)
- M H Zhu
- Biomaterial Inspection Center, Sichuan Province
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17
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Zhu MH, Berry JA, Russell SM, Leonard WJ. Delineation of the regions of interleukin-2 (IL-2) receptor beta chain important for association of Jak1 and Jak3. Jak1-independent functional recruitment of Jak3 to Il-2Rbeta. J Biol Chem 1998; 273:10719-25. [PMID: 9553136 DOI: 10.1074/jbc.273.17.10719] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Interleukin-2 (IL-2) induces heterodimerization of the IL-2 receptor beta (IL-2Rbeta) and gammac chains of its receptor and activates the Janus family tyrosine kinases, Jak1 and Jak3. Whereas Jak1 associates with IL-2Rbeta, Jak3 associates primarily with gammac but also with IL-2Rbeta. We analyzed four IL-2Rbeta mutations that diminish IL-2-induced proliferation and found that each also decreased IL-2-induced signal transducer and activator of transcription (STAT) activation. For this reason, and because the mutations were in the IL-2Rbeta membrane-proximal region, we investigated and found that each mutation diminished IL-2Rbeta association with both Jak1 and Jak3. This suggested that these Jaks might interact with the same region of IL-2Rbeta; however, certain IL-2Rbeta internal deletions and C-terminal truncations differentially affected the association of Jak1 and Jak3. Interestingly, just as Jak1-IL-2Rbeta association is Jak3-independent and functionally important, we show that Jak3-IL-2Rbeta association is Jak1-independent and implicate this association as being important for IL-2-induced Stat5 activation. Moreover, Jak1 and Jak3 could associate only in the presence of IL-2Rbeta, suggesting that these kinases can simultaneously bind to IL-2Rbeta. Thus, our data not only demonstrate that somewhat more distal as well as membrane-proximal cytoplasmic regions of a type I cytokine receptor are important for Jak kinase association but also suggest that two IL-2Rbeta-Jak kinase interactions are important for IL-2 signaling.
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Affiliation(s)
- M H Zhu
- Laboratory of Molecular Immunology, NHLBI, National Institutes of Health, Bethesda, Maryland 20892, USA
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18
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Liu J, Hu JL, Zhu MH. [The expression of mutant p53 gene in gastric carcinoma]. Zhonghua Nei Ke Za Zhi 1994; 33:370-2. [PMID: 7867423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Loss or inactivation of p53 gene--a suppressor oncogene has been considered to be one of the important mechanisms in the development of human tumors. One of the evidences for mutation of allelic gene of p53 is the identification of p53 protein concentrated in the nuclei of related cells. By using ABC immunohistochemical method, we studied the expression of p53 in cryostatic sections of the tumor tissue and adjacent mucosa resected from 38 patients with gastric cancer. p53 was found to be positive in the nuclei with intensive staining in 24 out of 38 cases with carcinoma (63.2%). p53 positive cells were distributed diffusively in the cancer tissue. All the adjacent mucosa specimens except 10 were negatively stained with p53 monoclonal antibody. These 10 specimens including 3 with dysplasia and 4 with metaplasia were only weakly stained. p53 was also found to be positive in 18 out of 23 cancer patients with metastasis in perigastric lymph nodes (78.3%). We also studied in the same section the nucleolar organizer region-associated proteins (AgNORs) with using silver staining technique to find if there is any relationship between p53 gene mutation and the activity of rRNA transcription of tumor cells. The number of AgNORs dots per nucleus detected in gastric cancer sections with positive staining of p53 (9.9 + 2.14) was greater than those with p53 negative staining (7.2 + 1.68). There was a significant statistical difference between the two groups (P < 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J Liu
- Department of Gastroenterology, Xijing Hospital, Xi'an
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19
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Zhu MH. [Relationship between mutation of tumor suppressor gene p53 and development of hepatocellular carcinoma]. Zhonghua Zhong Liu Za Zhi 1993; 15:245-7. [PMID: 7909744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Fourty-five cases of primary hepatocellular carcinoma (PHC) from areas of low aflatoxin B1 exposure but high risk of hepatitis B (HBV) were examined. Positive cases of HBV-DNA were determined in 40 of 45 cases by southern hybridization and polymerase chain reaction (PCR). Results of restriction fragment length polymorphism (RFLP) analysis showed that 1 of 33 informative cases revealed loss of heterozygosity at p53 gene locus. The point mutation of p53 exon 7 was detected by PCR and restriction enzyme digestion with RsaI, MspI and HaeIII, respectively. Only two of the 45 cases showed point mutation on codon 247 and 249, and sequence analysis showed that the changes were C-->G and G-->T, respectively. Frozen section examinations in 1 of 5 cases showed weak positive staining on nucleus by immunohistochemistry with anti-p53 monoclonal antibody (pAb1801). Our results provide evidence suggesting that HBV infection alone do not contribute to changes of p53 gene including allelic loss and point mutation. A multiple step process may exist and multiple genes may be involved in hepatocarcinogenesis.
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Affiliation(s)
- M H Zhu
- Department of Pathology, Fourth Military Medical University, Xi'an
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20
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Zhu MH. [Hepatitis B X antigen binding to p53 protein in the pathogenesis of primary hepatocellular carcinoma]. Zhonghua Yi Xue Za Zhi 1993; 73:325-8, 379. [PMID: 8258098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Much evidences have showed a close relation between HBV infection and the development of primary hepatocellular carcinoma (PHC). Molecular genetic study showed loss of heterozygosity in PHC and that point mutation of p53 exon 7 at codon 249 was important to PHC. But these changes of PHC associated with aflatoxin B1 and HBV were not apparent. Thirteen cases of PHC were examined to determine whether there were any relationship between HBxAg and p53 protein. HBV-DNA was integrated to PHC tissue in 9 of the 13 cases by southern blot; HBsAg, HBxAg or HBcAg was found in 8 by immunohistochemical staining. None had the point mutation of p53 exon 7 at codon 229, 247 and 249 by PCR and restriction enzymes. Immunoprecipitation analyses were carried out to test whether anti-X antibody was capable of precipitating p53 or anti-p53 could immunoprecipitate HBxAg polypeptides from HBV infected tissue. Specific band was detected at 53,000 in 7 of the 13 cases as precipitating with anti-HBxAg and western blotting using anti-p53, and specific band was detected at 13,000, 17,000 or 28,000 in 6 of the 13 cases as precipitating with anti-p53 and western blotting using anti-HBxAg. These results revealed that the binding of HBxAg to p53 may be analogous to that observed in tumor antigen encoded from selected papovaviruses, and adenoviruses, and may be a crucial step in the development of PHC among most HBV infected patients.
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Affiliation(s)
- M H Zhu
- Department of Pathology, Fourth Military Medical University, Xi'an
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