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Lin HZ, Lin YF, Zheng YR. Comparison of neurally adjusted ventilatory assist and synchronized intermittent mandatory ventilation in preterm infants after patent ductus arteriosus ligation: a retrospective study. BMC Pediatr 2024; 24:277. [PMID: 38678190 PMCID: PMC11055325 DOI: 10.1186/s12887-024-04727-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 03/27/2024] [Indexed: 04/29/2024] Open
Abstract
OBJECTIVE This study aimed to compare the efficacy of neurally adjusted ventilatory assist (NAVA) to synchronized intermittent mandatory ventilation (SIMV) in preterm infants requiring mechanical ventilation after patent ductus arteriosus (PDA) ligation. METHODS A retrospective analysis was conducted on intubated preterm infants who underwent PDA ligation at our hospital from July 2021 to January 2023. Infants were divided into NAVA or SIMV groups based on the ventilation mode after surgery. RESULTS Fifty preterm infants were included. During treatment, peak inspiratory pressure (PIP) and mean airway pressure (MAP) were lower with NAVA compared to SIMV (PIP: 19.1 ± 2.9 vs. 22.4 ± 3.6 cmH2O, P < 0.001; MAP: 9.1 ± 1.8 vs. 10.9 ± 2.7 cmH2O, P = 0.002). PaO2 and PaO2/FiO2 were higher with NAVA (PaO2: 94.0 ± 11.7 vs. 84.8 ± 15.8 mmHg, P = 0.031; PaO2/FiO2: 267 [220-322] vs. 232 [186-290] mmHg, P = 0.025). Less sedation was required with NAVA (midazolam: 1.5 ± 0.5 vs. 1.1 ± 0.3 μg/kg/min, P < 0.001). CONCLUSION Compared to SIMV, early use of NAVA post PDA ligation in preterm infants was associated with decreased PIP and MAP. Early NAVA was also associated with reduced sedation needs and improved oxygenation. However, further studies are warranted to quantify the benefits of NAVA ventilation.
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Affiliation(s)
- Hui-Zi Lin
- Department of Neonatology, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fujian Children's Hospital (Fujian Branch of Shanghai Children's Medical Center), Fuzhou, China
- Department of Neonatology, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Women and Children's Hospital, Fuzhou, China
| | - Yun-Feng Lin
- Department of Neonatology, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fujian Children's Hospital (Fujian Branch of Shanghai Children's Medical Center), Fuzhou, China.
- Department of Neonatology, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China.
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Women and Children's Hospital, Fuzhou, China.
| | - Yi-Rong Zheng
- Department of Cardiac Surgery, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fujian Children's Hospital (Fujian Branch of Shanghai Children's Medical Center), Fuzhou, China.
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Women and Children's Hospital, Fuzhou, China.
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Cui YP, Shi XD, Liu J, Mi C, Wang B, Pan YX, Lin YF. [Percutaneous pedicle screw fixation combined expandable tubular retractor in the treatment of spinal metastases]. Beijing Da Xue Xue Bao Yi Xue Ban 2023; 55:530-536. [PMID: 37291930] [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: 06/10/2023]
Abstract
OBJECTIVE To investigate the effectiveness of percutaneous pedicle screw fixation combined expandable tubular retractor in the treatment of patients with spinal metastases. METHODS In the study, 12 patients of spinal metastases treated with percutaneous pedicle screw fixation combined expandable tubular retractor in our hospital were retrospectively reviewed between June 2017 and October 2019. Among the 12 patients, 9 were males and 3 were females; the median age was 62.5 years [(65.1±2.9) years]. The decompression segment of 7 patients was located at the lower thoracic spine (including 1 patient with incomplete paraplegia) and the decompression segment of 5 patients was located at the lumbar spine; Tomita score was 6.0±0.6. Perioperative data of the patients were reviewed. Visual analog scale (VAS score), Karnofsky score, and Eastern Cooperative Oncology Group (ECOG) score were compared before and after surgery. The patient's survival, adjuvant treatment, and internal fixation failure were observed in the follow-up period. RESULTS All the 12 patients had a successful operation with percuta-neous pedicle screw fixation combined expandable tubular retractor. The average operative time, blood loss, and blood transfused of the patients were (247.0±14.6) min, (804.2±222.3) mL and (500.0±100.0) mL, respectively. The average amount of drainage was (240.8±79.3) mL. Drainage tubes were pulled out early postoperative [(3.2±0.3) d], allowing early mobilization. The patients discharged (7.8±0.8) d postoperative. All the patients were followed up for 6-30 months, and the average overall survival time was (13.6±2.4) months. During the follow-up period, 2 patients experienced screw displacement, the internal fixation was stable after conservative treatment and no revision surgery was performed. The VAS of the patients was 7.1±0.2 before surgery, which decreased to 2.3±0.1 and 2.8±0.4 at 3 and 6 months after surgery (P < 0.05). The Karnofsky score of the patients was 59.2±1.9 before surgery, which increased to 75.0±1.9 and 74.2±3.1 at 3 and 6 months after surgery (P < 0.05). The ECOG of the patients was 2.3±0.2 before surgery, which decreased to 1.7±0.1 and 1.7±0.2 at 3 and 6 months after surgery (P < 0.05). CONCLUSION For selected patients with spinal metastases, minimally invasive surgical treatment of spinal metastases (percutaneous pedicle screw internal fixation combined with expandable tubular retractor) can effectively relieve the clinical symptoms and improve the quality of life, with satisfactory clinical outcome.
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Affiliation(s)
- Y P Cui
- Department of Orthopaedics, Peking University First Hospital, Beijing 100034, China
| | - X D Shi
- Department of Orthopaedics, Peking University First Hospital, Beijing 100034, China
| | - J Liu
- Department of Radiology, Peking University First Hospital, Beijing 100034, China
| | - C Mi
- Department of Orthopaedics, Peking University First Hospital, Beijing 100034, China
| | - B Wang
- Department of Orthopaedics, Peking University First Hospital, Beijing 100034, China
| | - Y X Pan
- Department of Orthopaedics, Peking University First Hospital, Beijing 100034, China
| | - Y F Lin
- Department of Orthopaedics, Peking University First Hospital, Beijing 100034, China
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Lin YF, Wu XY, Yang L, Cheng GQ, Huang Y, Zhuang DY. [A family with early onset myopathy caused by MEGF10 gene defect and literature review]. Zhonghua Er Ke Za Zhi 2023; 61:261-265. [PMID: 36849355 DOI: 10.3760/cma.j.cn112140-20221214-01046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Objective: To summarize the genetic and clinical phenotypic characteristics of patients with early-onset myopathy, areflexia, respiratory distress and dysphagia (EMARDD) caused by multiple epidermal growth factor 10 (MEGF10) gene defect. Methods: The clinical data of 3 infants in 1 family with EMARDD caused by MEGF10 gene defect diagnosed in the Department of Neonatology, Xiamen Children's Hospital in April 2022 were analyzed retrospectively. Using "multiple epidermal growth factor 10" "myopathy" or "MEGF10" "myopathy" as the key words, and searching the relevant literature reports of CNKI, Wanfang Database and PubMed Database from the establishment of the database to September 2022. Combined with this family, the main clinical information and genotype characteristics of EMARDD patients caused by MEGF10 gene defect were summarized. Results: The proband, male, first infant of monozygotic twins, was admitted to hospital 7 days after birth "due to intermittent cyanosis with weak sucking". The infant had dysphagia accompanied with cyanosis of lips during feeding and crying after birth. Physical examination on admission revealed reduced muscle tone of the extremities, flexion of the second to fifth fingers of both hands with limited passive extension of proximal interphalangeal joints, and limited abduction of both hips. He was diagnosed as dysphagia of newborn, congenital dactyly. After admission, he was given limb and oral rehabilitation training, breathing gradually became stable and oral feeding fully allowed, and discharged along with improvement. The younger brother of the proband was admitted to the hospital at the same time, and his clinical manifestations, diagnosis and treatment process were the same as those of the proband. The elder brother of the proband died at the age of 8 months due to the delayed growth and development, severe malnutrition, hypotonia, single palmoclal crease and weak crying. A whole exon sequencing of the family was done, and found that the 3 children were all compound heterozygous variations at the same site of MEGF10 gene, with 2 splicing variants (c.218+1G>A, c.2362+1G>A), which came from the father and mother respectively, and the new variation was consistent with the autosomal recessive inheritance model. Three children were finally diagnosed as EMARDD caused by MEGF10 gene defect. There are 0 Chinese literature and 18 English literature that met the search conditions. Totally 17 families including 28 patients were reported. There were 31 EMARDD patients including 3 infants from this family. Among them, there were 13 males and 18 females. The reported age of onset ranged from 0 to 61 years. Except for 5 patients with incomplete clinical data, 26 patients were included in the analysis of phenotypic and genotypic characteristics. The clinical features were mainly dyspnea (25 cases), scoliosis (22 cases), feeding difficulties (21 cases), myasthenia (20 cases), and other features including areflexia (16 cases) and cleft palate or high palatal arch(15 cases). Muscle biopsy showed non-specific changes, with histological characteristics ranging from slight muscle fiber size variation to minicores change which was seen in all 5 patients with at least 1 missense mutation of allele. In addition, the adult onset was found in patients with at least 1 missense variant of MEGF10 gene. Conclusions: MEGF10 gene defect related EMARDD can occur in the neonatal period, and the main clinical features are muscle weakness, breathing and feeding difficulties. Patients with myopathy who have at least 1 missense mutation and muscle biopsy indicating minicores change may be relatively mild.
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Affiliation(s)
- Y F Lin
- Department of Neonatology, Xiamen Hospital (Xiamen Children's Hospital), Children's Hospital of Fudan University, Xiamen 361000, China
| | - X Y Wu
- Department of Neonatology, Xiamen Hospital (Xiamen Children's Hospital), Children's Hospital of Fudan University, Xiamen 361000, China
| | - L Yang
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai 200020, China
| | - G Q Cheng
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai 200020, China
| | - Y Huang
- Department of Neonatology, Xiamen Hospital (Xiamen Children's Hospital), Children's Hospital of Fudan University, Xiamen 361000, China
| | - D Y Zhuang
- Department of Neonatology, Xiamen Hospital (Xiamen Children's Hospital), Children's Hospital of Fudan University, Xiamen 361000, China
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Gao S, Lin Y. Nucleic Acid Nanomaterials: Biostability and Applications. Curr Drug Metab 2023; 24:314. [PMID: 37728080 DOI: 10.2174/138920022405230824141125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Affiliation(s)
- Shaojingya Gao
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No.14. 3rd Sec, Ren Min Nan Road, Chengdu 610041 P.R. China
| | - YunFeng Lin
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No.14. 3rd Sec, Ren Min Nan Road, Chengdu 610041 P.R. China
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Zhang LX, Lin YF, Zhang L, Wang X, Song JH. First Report of Anthracnose Caused by Colletotrichum liaoningense on Trichosanthes kirilowii in China. Plant Dis 2022; 106:PDIS07211363PDN. [PMID: 34472965 DOI: 10.1094/pdis-07-21-1363-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- L X Zhang
- College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - Y F Lin
- College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - L Zhang
- College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - X Wang
- College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - J H Song
- College of Horticulture, Anhui Agricultural University, Hefei, 230036, China
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Lin YF, Lin WH, Lin SH, Zhang QL, Chen Q, Zheng YR. Using Human Milk Fortifiers to Improve the Preoperative Nutritional Status of Infants With Non-restricted Ventricular Septal Defect. Front Pediatr 2022; 10:900012. [PMID: 35832586 PMCID: PMC9271765 DOI: 10.3389/fped.2022.900012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 06/03/2022] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To explore the effects of human milk fortifier (HMF) on improving the preoperative nutritional status of infants with non-restricted ventricular septal defect (VSD). METHODS A prospective randomized controlled study was conducted in a provincial hospital in China. Participants were randomly divided into an intervention group (n = 29) and a control group (n = 29). HMFs were added proportionally to the infants' feeds in the intervention group based on breastfeeding status, and the infants in the control group received exclusive breastfeeding as needed. The nutritional status of the two groups was compared 1 month after the intervention. RESULTS Compared with the control group, the weight, head circumference, height, albumin level, and prealbumin level of the human milk fortifier group were significantly higher 1 month after the intervention (p < 0.05). The STRONGkids score of the HMF group was significantly lower than that of the non-HMF group (p < 0.05). There was no significant difference in pneumonia, liver insufficiency, feeding intolerance, or jaundice between the two groups. CONCLUSION The addition of HMFs based on the breastfeeding status of infants with non-restricted VSD can improve the preoperative nutritional status and does not increase the incidence of gastrointestinal complications. CLINICAL TRIAL REGISTRATION http://www.chictr.org.cn/index.aspx, identifier: ChiCTR2000041135.
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Affiliation(s)
- Yun-Feng Lin
- Department of Neonatology, Fujian Branch of Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Fuzhou, China.,Department of Neonatology, Fujian Children's Hospital, Fuzhou, China.,Department of Neonatology, Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics and Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Wen-Hao Lin
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Children's Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics and Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Shi-Hao Lin
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Children's Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics and Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Qi-Liang Zhang
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Children's Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics and Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Qiang Chen
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Children's Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics and Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
| | - Yi-Rong Zheng
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Children's Hospital, Fuzhou, China.,Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics and Gynecology and Pediatrics, Fujian Medical University, Fuzhou, China
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7
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Zhuang ZXD, Lin YF, Zhong XB, Zhang SZ, Liao XX. Identification of potential therapeutic targets for coronary artery disease based on protein array and Mendelian Randomization analysis. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Currently, coronary artery disease (CAD) is a main cause of mortality worldwide. Exposing the unknown pathogenic mechanism and exploring potential therapeutic targets of CAD is a critical issue in current CAD research. We aimed to identify potential therapeutic target for CAD using 2-sample Mendelian randomization (MR) approach among differential expression proteins between CAD and control group.
Methods
Serum samples from 16 first-onset CAD patients diagnosed by coronary angiography and 10 non-CAD controls were collected and detected using protein array. We identified differentially expressed proteins based on “DEseq2” R package and found the core module using MCODE plugin in Cytoscape. Proteins in core modules were used as candidate protein for causal inference. Genetic instrument variables (IV) of candidate proteins were extracted from Age, Gene/Environment Susceptibility-Reykjavik Study (AGES-RS). Two-sample MR was performed to detect the causal association between the candidate proteins and CAD. For the identified protein causally associated with CAD, sensitivity analyses were used to confirm the finding, including using other MR approach, using more stringent instrument variables, and external cohorts for verification. Network MR was performed to explore whether metabolic risk factors for CAD mediated the risk of identified proteins, including indices of lipid metabolism, glucose metabolism, obesity and blood pressure. Mediation analysis was used to measure the effect of mediation.
Results
A total of 81 differentially expressed protein were found in CAD group compare to control group, among which 3 core functional modules were found. In five candidate proteins with available instrumental variables, only GP73 was causally associated with CAD risk. Per 1 SD increment in genetically determined GP73 level was associated with 12% increased CAD risk (odds ratio: 1.12; 95% confidence interval: 1.06–1.18, FDR<0.001). Sensitivity analysis yielded consistent results. Network MR analysis shows that across metabolic risk factors profiles for CAD, GP73 level was causally associated with low-density lipoprotein cholesterol (LDL-c), glycated hemoglobin (HbA1c) and waist-to-hip ratio (WHR). Besides, LDL-c, HbA1c and WHR serves as mediators in the causal pathway from GP73 to CAD and transmitted 40.4%, 1.4%, and 5.5% of the total effects, respectively.
Conclusion
Based on protein array and bioinformatics analysis, this study screened out 3 modules that play core functions in the differential expressed proteins. Among the 19 proteins in the core module, there was a causal relationship between circulating GP73 levels and incident CAD, and the causal effect is mainly mediated by lipid metabolism. The results suggest that GP73 can not only be used as a novel biomarker of CAD, but also may provide a new potential therapeutic target for the management of CAD.
Funding Acknowledgement
Type of funding sources: None. Figure 1
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Affiliation(s)
- Z X D Zhuang
- First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Y F Lin
- First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - X B Zhong
- First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - S Z Zhang
- First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - X X Liao
- First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Lai SH, Xie YL, Chen ZQ, Chen R, Cai WH, Wu LC, Lin YF, Zheng YR. Non-invasive High-Frequency Oscillatory Ventilation as Initial Respiratory Support for Preterm Infants With Respiratory Distress Syndrome. Front Pediatr 2021; 9:792160. [PMID: 35096707 PMCID: PMC8793903 DOI: 10.3389/fped.2021.792160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 12/17/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives: The aim of this study was to investigate the safety and feasibility of nHFOV as initial respiratory support in preterm infants with RDS. Methods: This study retrospectively analyzed the clinical data of 244 premature infants with RDS who were treated in our hospital from January 2016 to January 2019 and divided into the nHFOV group (n = 115) and the BiPAP group (n = 129) based on the initial respiratory support method. Results: Respiratory outcomes showed that the rate of NIV failure during the first 72 hours of life in the nHFOV group was significantly lower than that in the BiPAP group. The time of NIV in the nHFOV group was significantly shorter than that in the BiPAP group. The time of supplemental oxygen in the nHFOV group was significantly shorter than that in the BiPAP group. The incidence of air leakage syndrome in the nHFOV group was significantly lower than that in the BiPAP group, and the length of hospital stay of the nHFOV group was also significantly shorter than that in the BiPAP group. Although the rate of infants diagnosed with BPD was similar between the two groups, the rate of severe BPD in the nHFOV group was significantly lower than that in the BiPAP group. Conclusion: This study showed that nHFOV as initial respiratory support for preterm infants with RDS was feasible and safe compared to BiPAP. Furthermore, nHFOV can reduce the need for IMV and reduce the incidence of severe BPD and air leak syndrome.
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Affiliation(s)
- Shu-Hua Lai
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Ying-Ling Xie
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Zhi-Qing Chen
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Rong Chen
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Wen-Hong Cai
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Luo-Cheng Wu
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Yun-Feng Lin
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Fujian Branch of Shanghai Children's Medical Center, Fuzhou, China.,Fujian Children's Hospital, Fuzhou, China
| | - Yi-Rong Zheng
- Department of Neonatology, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Fujian Branch of Shanghai Children's Medical Center, Fuzhou, China.,Fujian Children's Hospital, Fuzhou, China
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Karathanos A, Lin YF, Dannenberg L, Parco C, Schulze V, Brockmeyer M, Krieger T, Jung C, Heinen Y, Perings S, Zeymer U, Kelm M, Polzin A, Wolff G. P957Survival benefits of routine glycoprotein IIb/IIIa inhibitors during primary PCI in ST-segment elevation myocardial infarction: A meta-analysis of randomised controlled trials. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Cardiovascular guidelines recommend adjunct glycoprotein IIb/IIIa inhibitors (GPI) only in selected patients with acute ST-segment elevation myocardial infarction (STEMI).
Purpose
This study aimed to evaluate routine GPI use in STEMI treated with primary PCI.
Methods
Online databases were systematically searched for randomised controlled trials (RCTs) of routine GPI vs. control therapy in STEMI. Data from retrieved studies were abstracted and evaluated in a comprehensive meta-analysis using Mantel-Haenszel estimates of risk ratios (RR) as summary statistics.
Results
After systematic review, twenty-one RCTs with 8,585 patients were included: ten trials randomized tirofiban (T), nine abciximab (A), one eptifibatide (E), one trial used A+T; only one trial used DAPT with prasugrel/ ticagrelor. Routine GPI were associated with a significant reduction in all-cause mortality at 30 days (2.4% (GPI) vs. 3.2%; risk ratio (RR) 0.72; p=0.01) and 6 months (3.7% vs. 4.8%; RR 0.76; p=0.02), and a reduction in recurrent MI (1.1% vs. 2.1%; RR 0.55; p=0.0006), repeat revascularization (2.5% vs. 4.1%; RR 0.63; p=0.0001), TIMI flow <3 after PCI (5.4% vs. 8.2%; RR 0.61; p<0.0001) and ischemic stroke (RR 0.42; p=0.04). Major (4.7% vs. 3.4%; RR 1.35; p=0.005) and minor bleedings (7.2% vs. 5.1%; RR 1.39; p=0.006) but not intracranial bleedings (0.1% vs. 0%; RR 2.7; p=0.37) were significantly increased under routine GPI.
Conclusions
Routine GPI administration during primary PCI in STEMI resulted in mortality reduction, driven by reductions in recurrent ischemic events – however predominantly in trials pre-prasugrel/ticagrelor. Trials in contemporary STEMI management are needed to confirm these findings.
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Affiliation(s)
| | - Y F Lin
- University of Dusseldorf, Duesseldorf, Germany
| | | | - C Parco
- University of Dusseldorf, Duesseldorf, Germany
| | - V Schulze
- University of Dusseldorf, Duesseldorf, Germany
| | | | - T Krieger
- University of Dusseldorf, Duesseldorf, Germany
| | - C Jung
- University of Dusseldorf, Duesseldorf, Germany
| | - Y Heinen
- University of Dusseldorf, Duesseldorf, Germany
| | - S Perings
- University of Dusseldorf, Duesseldorf, Germany
| | - U Zeymer
- University of Dusseldorf, Duesseldorf, Germany
| | - M Kelm
- University of Dusseldorf, Duesseldorf, Germany
| | - A Polzin
- University of Dusseldorf, Duesseldorf, Germany
| | - G Wolff
- University of Dusseldorf, Duesseldorf, Germany
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Xiong BB, Lin CM, Lin YF, Liu J, Chen GG. [The clinical characteristics of the evoked nystagmus in the non-affected side during Dix-Hallpike test in the unilateral posterior semicircular canal benign paroxysmal positional vertigo]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:1451-1454. [PMID: 30550185 DOI: 10.13201/j.issn.1001-1781.2018.19.002] [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: 08/03/2018] [Indexed: 11/12/2022]
Abstract
Objective: To investigate the clinical characteristics of the evoked nystagmus in the non-affected side during Dix-Hallpike test(D-H test)in unilateral posterior semicircular canal benign paroxysmal positional vertigo(PC-BPPV). Method: Two hundred and thirty-six patients were diagnosed with unilateral PC-BPPV in the Tinnitus and Dizziness clinic.Among them,14 patients exhibited positive nystagmus when the non-affected side was stimulated by D-H test. The clinical data from this subgroup of patients were retrospectively analyzed. Result: The upbeat and torsional nystagmus of 14 patients were all evoked by D-H test in the affected side. 11 cases were right PC-BPPV and 3 cases were left PC-BPPV. Among these 14 patients, 5 patients exhibited the upbeat and torsional nystagmus during D-H test in the non-affected side, which was in the same direction as that evoked in the affected side. Among them, 4 cases were right PC-BPPV and 1 case was left PC-BPPV. However, the downbeat nystagmus of the remaining 9 patients were evoked by D-H test in the non-affected side, in which 7 cases were right PC-BPPV and 2 cases were left PC-BPPV.The nystagmus and vertigo of all patients completely disappeared after performing the Epley or Semont repositioning maneuvers on the affected side. Conclusion: The bilateral positive nystagmus of unilateral PC-BPPV can be evoked by D-H test. The form of nystagmus on the non-affected side is related with the initial position of otoconia in affected semicircular canal and the moving direction of otoconia during the positional test. It is effective to perform Epley or Semont repositioning maneuvers on the affected side. Meanwhile, both the effect of maneuvers and the type of nystagmus evoked by D-H test can verify which side is affected.
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Affiliation(s)
- B B Xiong
- Department of Otolaryngology Head and Neck Surgery, Zhuhai Hospital Affiliated with Ji'nan University,(Zhuhai People's Hospital), Zhuhai, 519000, China
| | - C M Lin
- Department of Otolaryngology Head and Neck Surgery, Zhuhai Hospital Affiliated with Ji'nan University,(Zhuhai People's Hospital), Zhuhai, 519000, China
| | - Y F Lin
- Department of Otolaryngology Head and Neck Surgery, Zhuhai Hospital Affiliated with Ji'nan University,(Zhuhai People's Hospital), Zhuhai, 519000, China
| | - J Liu
- Department of Otolaryngology Head and Neck Surgery, Zhuhai Hospital Affiliated with Ji'nan University,(Zhuhai People's Hospital), Zhuhai, 519000, China
| | - G G Chen
- Department of Otolaryngology Head and Neck Surgery, the First Hospital, Shanxi Medical University, Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, Key Institute and Laboratory of Otolaryngology Affiliated with Shanxi Province
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Zhou M, Liu NX, Shi SR, Li Y, Zhang Q, Ma QQ, Tian TR, Ma WJ, Cai XX, Lin YF. Effect of tetrahedral DNA nanostructures on proliferation and osteo/odontogenic differentiation of dental pulp stem cells via activation of the notch signaling pathway. Nanomedicine 2018; 14:1227-1236. [PMID: 29458214 DOI: 10.1016/j.nano.2018.02.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/23/2018] [Accepted: 02/08/2018] [Indexed: 02/05/2023]
Abstract
Dental pulp stem cells (DPSCs) derived from the human dental pulp tissue have multiple differentiation capabilities, such as osteo/odontogenic differentiation. Therefore, DPSCs are deemed as ideal stem cell sources for tissue regeneration. As new nanomaterials based on DNA, tetrahedral DNA nanostructures (TDNs) have tremendous potential for biomedical applications. Here, the authors aimed to explore the part played by TDNs in proliferation and osteo/odontogenic differentiation of DPSCs, and attempted to investigate if these cellular responses could be driven by activating the canonical Notch signaling pathway. Upon exposure to TDNs, proliferation and osteo/odontogenic differentiation of DPSCs were dramatically enhanced, accompanied by up regulation of Notch signaling. In general, our study suggested that TDNs can significantly promote proliferation and osteo/odontogenic differentiation of DPSCs, and this remarkable discovery can be applied in tissue engineering and regenerative medicine to develop a significant and novel method for bone and dental tissue regeneration.
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Affiliation(s)
- Mi Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Nan-Xin Liu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Si-Rong Shi
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yong Li
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou, China
| | - Qi Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Quan-Quan Ma
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Tao-Ran Tian
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wen-Juan Ma
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiao-Xiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yun-Feng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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Shao XR, Wei XQ, Zhang S, Fu N, Lin YF, Cai XX, Peng Q. Effects of Micro-environmental pH of Liposome on Chemical Stability of Loaded Drug. Nanoscale Res Lett 2017; 12:504. [PMID: 28836126 PMCID: PMC6890883 DOI: 10.1186/s11671-017-2256-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 07/28/2017] [Indexed: 02/05/2023]
Abstract
Liposome is a promising carrier system for delivering bioactive molecules. However, the successful delivery of pH-sensitive molecules is still limited by the intrinsic instability of payloads in physiological environment. Herein, we developed a special liposome system that possesses an acidic micro-environment in the internal aqueous chamber to improve the chemical stability of pH-sensitive payloads. Curcumin-loaded liposomes (Cur-LPs) with varied internal pH values (pH 2.5, 5.0, or 7.4) were prepared. These Cur-LPs have similar particle size of 300 nm, comparable physical stabilities and analogous in vitro release profiles. Interestingly, the chemical stability of liposomal curcumin in 50% fetal bovine serum and its anticancer efficacy in vitro are both micro-environmental pH-dependent (Cur-LP-2.5 > Cur-LP-5.0 > Cur-LP-7.4). This serum stability still has space to be further enhanced to improve the applicability of Cur-LP. In conclusion, creating an acidic micro-environment in the internal chamber of liposome is feasible and efficient to improve the chemical stability of pH-sensitive payloads.
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Affiliation(s)
- Xiao-Ru Shao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Block 3, Renmin Road South, Chengdu, 610041, China
| | - Xue-Qin Wei
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Block 3, Renmin Road South, Chengdu, 610041, China
| | - Shu Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Block 3, Renmin Road South, Chengdu, 610041, China
| | - Na Fu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Block 3, Renmin Road South, Chengdu, 610041, China
| | - Yun-Feng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Block 3, Renmin Road South, Chengdu, 610041, China
| | - Xiao-Xiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Block 3, Renmin Road South, Chengdu, 610041, China.
| | - Qiang Peng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, No. 14, Block 3, Renmin Road South, Chengdu, 610041, China.
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13
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Cui YP, Mi C, Shi XD, Wang B, Pan YX, Lin YF. [Clinical characteristics and prognosis of cultured negative pyogenic spondylitis]. Beijing Da Xue Xue Bao Yi Xue Ban 2017; 49:226-230. [PMID: 28416829] [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: 06/07/2023]
Abstract
OBJECTIVE There are limited data describing the clinical characteristics and prognosis of culture negative pyogenic spondylitis. The aim of this study was to investigate the treatment, prognosis and clinical characteristics of culture negative pyogenic spondylitis. METHODS A retrospective study reviewed 74 patients who were diagnosed with spondylitis in Peking University First Hospital from January 2010 to December 2015. A total of 27 patients suffered from pyogenic spondylitis. According to the pathogenic culture results, the patients were divided into two groups: culture negative group and culture positive group. The clinical characteristics and treatment outcomes between the two groups were compared. RESULTS The elder were more vulnerable to pyogenic spondylitis, and of the 27 patients, 12 patients were female and 15 male. All patients had no history of administration of antibiotics prior to obtaining culture samples. A causative germ was identified in 14/27 patients (51.9%) with Staphylococcus aureus being the most common pathogen. There was no significant difference between the two groups in the patient's age, gender, visual analogue score (VAS), predisposing factor, clinical symptom, sign and spinal segment (P>0.05). Erythrocyte sedimentation rate (ESR) (P=0.056) and C-reactive protein (CRP) (P=0.040) of culture negative group were lower in contrast to culture positive group. The incidence of vertebral abscess in culture negative group was higher than in culture positive group (P=0.046). After treatment, ESR dropped almost equally in both groups, and CRP dropped faster in the culture positive group (P=0.192). At last, there was no significant difference between the two groups in hospital stay, pain relief, open debridement operation rate, and recurrence rate of infection. CONCLUSION ESR and CRP of the culture negative patient were lower than those of the culture positive patient, and the incidence rate of paravertebral abscess was higher than that of the culture positive patient. After administration of antibiotics, there was no significant difference between the two groups in duration of antibiotics, open debridement operation rate and recurrence rate of infection. So, culture negative may not necessarily be a negative prognostic factor for pyogenic spondylitis. However, we should watch out for the drug resistant bacteria or double infection, due to the long term use of wide-spectrum antibiotic in culture negative patients.
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Affiliation(s)
- Y P Cui
- Department of Orthopaedic, Peking University First Hospital, Beijing 100034, China
| | - C Mi
- Department of Orthopaedic, Peking University First Hospital, Beijing 100034, China
| | - X D Shi
- Department of Orthopaedic, Peking University First Hospital, Beijing 100034, China
| | - B Wang
- Department of Orthopaedic, Peking University First Hospital, Beijing 100034, China
| | - Y X Pan
- Department of Orthopaedic, Peking University First Hospital, Beijing 100034, China
| | - Y F Lin
- Department of Orthopaedic, Peking University First Hospital, Beijing 100034, China
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Shao XR, Lin SY, Peng Q, Shi SR, Li XL, Zhang T, Lin YF. Effect of tetrahedral DNA nanostructures on osteogenic differentiation of mesenchymal stem cells via activation of the Wnt/β-catenin signaling pathway. Nanomedicine 2017; 13:1809-1819. [PMID: 28259801 DOI: 10.1016/j.nano.2017.02.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 02/10/2017] [Accepted: 02/15/2017] [Indexed: 02/05/2023]
Abstract
Adipose-derived stem cells (ADSCs) are considered to be ideal stem cell sources for bone regeneration owing to their ability to differentiate into osteo-like cells. Therefore, they have attracted increasing attention in recent years. Tetrahedral DNA nanostructures (TDNs), a new type of DNA-based biomaterials, have shown great potential for biomedical applications. In the present work, we aimed to investigate the role played by TDNs in osteogenic differentiation and proliferation of ADSCs and tried to explore if the canonical Wnt signal pathway could be the vital biological mechanism driving these cellular responses. Upon exposure to TDNs, ADSCs proliferation and osteogenic differentiation were significantly enhanced, accompanied by the up-regulation of genes correlated with the Wnt/β-catenin pathway. In conclusion, our results indicate that TDNs are crucial regulators of the increase in osteogenic potential and ADSCs proliferation, and this noteworthy discovery could provide a promising novel approach toward ADSCs-based bone defect regeneration.
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Affiliation(s)
- Xiao-Ru Shao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shi-Yu Lin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qiang Peng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Si-Rong Shi
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiao-Long Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Tao Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yun-Feng Lin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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Peng Q, Shao XR, Xie J, Shi SR, Wei XQ, Zhang T, Cai XX, Lin YF. Understanding the Biomedical Effects of the Self-Assembled Tetrahedral DNA Nanostructure on Living Cells. ACS Appl Mater Interfaces 2016; 8:12733-9. [PMID: 27153101 DOI: 10.1021/acsami.6b03786] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Qiang Peng
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-Ru Shao
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
| | - Jing Xie
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
| | - Si-Rong Shi
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xue-Qin Wei
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
| | - Tao Zhang
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-xiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
| | - Yun-Feng Lin
- State Key Laboratory of Oral Diseases, West China Hospital
of Stomatology, Sichuan University, Chengdu 610041, China
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16
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Chen YJ, Lin YF, Huang JH, Gong XH, Luo ZD, Huang YD. Efficient diode-pumped acousto-optic Q-switched Er:Yb:GdAl(3)(BO(3))(4) pulse laser at 1522 nm. Opt Lett 2015; 40:4927-4930. [PMID: 26512485 DOI: 10.1364/ol.40.004927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
End-pumped by a continuous-wave 976 nm diode laser, efficient 1522 nm laser operation was demonstrated in an Er:Yb:GdAl(3)(BO(3))(4) crystal when a sapphire crystal was used as a heat diffuser. A continuous-wave 1522 nm laser with a maximum output power of 750 mW and slope efficiency of 36% was realized at an absorbed pump power of 4.1 W. The pulse performances of an acousto-optic Q-switched laser with various repetition frequencies were investigated in detail. In a repetition frequency range of 1-10 kHz, 1522 nm pulse lasers with a slope efficiency of about 10%, peak output power at the kilowatt level, and width of about 50 ns were first obtained in an Er:Yb:GdAl(3)(BO(3))(4) crystal pumped by a continuous-wave diode laser. The results indicate that the crystal is a promising gain medium for an actively Q-switched 1.5 μm laser.
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Shao XR, Wei XQ, Song X, Hao LY, Cai XX, Zhang ZR, Peng Q, Lin YF. Independent effect of polymeric nanoparticle zeta potential/surface charge, on their cytotoxicity and affinity to cells. Cell Prolif 2015; 48:465-74. [PMID: 26017818 PMCID: PMC6496505 DOI: 10.1111/cpr.12192] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 03/01/2015] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES Up to now, little research has been focussed on discovering how zeta potential independently affects polymeric nanoparticle (NP) cytotoxicity. METHODS Polymeric nanoparticles of gradient zeta potential ranging from -30 mv to +40 mv were fabricated using the same poly-3-hydroxybutyrate-co-3-hydroxyhexanoate (PHBHHx) biopolymer. Interaction forces between nanoparticles and cells were measured by atomic force microscopy (AFM). Cytotoxicity of the nanoparticles to cells was investigated by using MTT (3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide) assay. RESULTS Four kinds of nanoparticle with similar sizes and gradient zeta potentials, were fabricated. Those with positive surface charges were found to be more toxic than those with negative surface charges. Positively charged nanoparticles or nanoparticles with higher 'like' charges, offered higher interaction force with cells. CONCLUSION This work proposes a novel approach for investigating interaction between NPs and cells, and discloses the importance of controlling zeta potential in developing NPs-based formulations in the future.
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Affiliation(s)
- Xiao-Ru Shao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xue-Qin Wei
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xu Song
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Li-Ying Hao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiao-Xiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Zhi-Rong Zhang
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Qiang Peng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yun-Feng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
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Yuan YM, Luo L, Guo Z, Yang M, Lin YF, Luo C. Smoking, aging, and expression of proteins related to the FOXO3 signaling pathway in lung tissues. Genet Mol Res 2015; 14:8547-54. [PMID: 26345785 DOI: 10.4238/2015.july.31.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We investigated the effects of smoking and aging on proteins involved in the forkhead box O3 (FOXO3) signaling pathways in the lungs. Sixteen senescence-accelerated mouse-resistant 1 (SAMR1) and senescence-accelerated mouse-prone 8 (SAMP8) mice at 3 months of age were divided into a normally aged, smoke-exposed group (4 SAMR1 mice), a normally aged, air-exposed group (4 SAMR1 mice), an aging-accelerated, smoke-exposed group (4 SAMP8 mice), and an aging-accelerated, air-exposed group (4 SAMP8 mice). Expression of genes and proteins related to the FOXO3 signaling pathways in each group was examined by western blot analysis and immunohistochemistry. FOXO3a expression was significantly increased in the normally aged, air-exposed group compared with the aging-accelerated, air-exposed group. FOXO3a expression was significantly reduced in the aging-accelerated, smoke-exposed group compared with the aging-accelerated, air-exposed group. Sirtuin 1, manganese superoxide dis-mutase, and phosphatidylinositol 3-kinase (PI3K)/Akt expression decreased significantly in the smoke-exposed groups compared with the air-exposed groups and in the aging-accelerated groups compared with the normally aged groups. Signal transduction pathways mediated by the transcription factor FOXO3a (such as the PI3K/Akt pathway) may be involved in the accelerated aging of lung tissues in chronic obstructive pulmonary disease. Smoking inactivates the transcription factor FOXO3, thus accelerating lung tissue aging during chronic obstructive pulmonary disease.
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Affiliation(s)
- Y M Yuan
- Department of Geriatric Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - L Luo
- Department of Geriatric Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Z Guo
- Ear, Nose and Throat Department, Pixian TCM Hospital, Chengdu, China
| | - M Yang
- Department of Geriatric Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Y F Lin
- West China School of Medicine, Sichuan University, Chengdu, China
| | - C Luo
- Department of Geriatric Medicine, West China Hospital, Sichuan University, Chengdu, China
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Wei XQ, Hao LY, Shao XR, Zhang Q, Jia XQ, Zhang ZR, Lin YF, Peng Q. Insight into the Interaction of Graphene Oxide with Serum Proteins and the Impact of the Degree of Reduction and Concentration. ACS Appl Mater Interfaces 2015; 7:13367-74. [PMID: 26029973 DOI: 10.1021/acsami.5b01874] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xue-Qin Wei
- State
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Li-Ying Hao
- State
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-Ru Shao
- State
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Quan Zhang
- Key
Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of
Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Xiao-Qin Jia
- State
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Zhi-Rong Zhang
- Key
Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of
Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yun-Feng Lin
- State
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Qiang Peng
- State
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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20
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Peng Q, Wei XQ, Yang Q, Zhang S, Zhang T, Shao XR, Cai XX, Zhang ZR, Lin YF. Enhanced biostability of nanoparticle-based drug delivery systems by albumin corona. Nanomedicine (Lond) 2015; 10:205-14. [PMID: 25600966 DOI: 10.2217/nnm.14.86] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Aims: The long-term efficacy of nanoparticles is limited by their rapid metabolism in tissues. In this work, we aim to enhance nanoparticle biostability by preforming a bovine serum albumin (BSA) corona. Materials & methods: A BSA corona was formed by incubating poly-3-hydroxybutyrate-co-3-hydroxyhexanoate nanoparticles with BSA solution and confirmed by SDS-PAGE and x-ray photoelectron spectroscopy. The impacts of the BSA corona on the drug release, biostability and biodistribution of nanoparticles were investigated. Results: In the presence of the BSA corona, the drug release (coumarin-6 was used as the model drug) of nanoparticles was significantly slower and their stability in liver homogenate and in organs was enhanced. Conclusion: Preformation of a BSA corona may be a promising approach for enhancing drug biostability and for developing long-acting nanoparticle formulations. Original submitted 25 February 2014; Revised submitted 10 April 2014
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Affiliation(s)
- Qiang Peng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xue-Qin Wei
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Qin Yang
- Key Laboratory of Drug Targeting & Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Shu Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Ting Zhang
- Key Laboratory of Drug Targeting & Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Xiao-Ru Shao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-Xiao Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Zhi-Rong Zhang
- Key Laboratory of Drug Targeting & Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yun-Feng Lin
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Peng Q, Wei XQ, Shao XR, Zhang T, Zhang S, Fu N, Cai XX, Zhang ZR, Lin YF. Nanocomplex Based on Biocompatible Phospholipids and Albumin for Long-Circulation Applications. ACS Appl Mater Interfaces 2014; 6:13730-7. [PMID: 25058846 DOI: 10.1021/am503179a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Qiang Peng
- State Key Laboratory
of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xue-Qin Wei
- State Key Laboratory
of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-Ru Shao
- State Key Laboratory
of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Ting Zhang
- Key Laboratory
of Drug Targeting and Drug Delivery Systems, Ministry of Education,
West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Shu Zhang
- State Key Laboratory
of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Na Fu
- State Key Laboratory
of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-Xiao Cai
- State Key Laboratory
of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Zhi-Rong Zhang
- Key Laboratory
of Drug Targeting and Drug Delivery Systems, Ministry of Education,
West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Yun-Feng Lin
- State Key Laboratory
of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Sun JJ, Zheng XH, Wang LY, Liu L, Jing W, Lin YF, Tian W, Tang W, Long J. New bone formation enhanced by ADSCs overexpressing hRunx2 during mandibular distraction osteogenesis in osteoporotic rabbits. J Orthop Res 2014; 32:709-20. [PMID: 24522890 DOI: 10.1002/jor.22590] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 01/14/2014] [Indexed: 02/04/2023]
Abstract
Promoting new bone formation during distraction osteogenesis (DO) in elderly patients with osteoporosis is still a challenge. In this study, we investigated the effect of gene therapy using local Runt-related gene 2 on new bone formation during osteoporotic mandibular DO in rabbits. First, we successfully established a mandibular osteoporotic animal model by ovariectomizing rabbits. Second, the right mandibles of the osteoporotic rabbits were distracted after corticotomy. The distraction gap of the rabbits in Group A2 and B2 were injected with Adv-hRunx2-GFP-transfected adipose-derived stromal cells (ADSCs) and Adv-GFP-transfected ADSCs, respectively. Rabbits in Groups C2 (ovariectomized control) and D2 (sham surgery control) were injected with physiologic saline. New-generation bone tissue in the distraction gap was analyzed via plain radiographic examinations, micro-computed tomography, histological examinations, and biomechanical testing at weeks 3, 6, and 9 of the consolidation period. Results of above examinations showed that no ideal new bone formation was observed in Groups B2 and C2, but obvious ideal new bone formation was observed in Group A2 and D2. The results suggested that gene therapy using rhRunx2-modified ADSCs promoted new bone formation during osteoporotic mandibular DO and effectively compensated for the detrimental effects of systemic osteoporosis on new bone formation.
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Affiliation(s)
- Jing-Jing Sun
- The State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, P.R, China; Department of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu, 610041, P.R, China
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Wang J, Jian F, Chen J, Ye NS, Huang YH, Wang S, Huang RH, Pei J, Liu P, Zhang L, Zhao ZH, Chen QM, Lai WL, Lin YF. Cognitive behavioral therapy for orthodontic pain control: a randomized trial. J Dent Res 2012; 91:580-5. [PMID: 22492277 DOI: 10.1177/0022034512444446] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The objective of this study was to evaluate the efficacy of cognitive behavioral therapy intervention for patients who experienced pain during orthodontic treatment. The baseline characteristics were assessed via questionnaires and oral examinations. Four hundred and fifty eligible individuals were recruited and randomized by computer-generated block randomization into three groups: cognitive behavioral therapy intervention (n = 150), ibuprofen intervention (n = 150), and no intervention (control; n = 150). Primary outcomes were the change from baseline in pain intensity measured with 100-mm Visual Analog Scale (VAS) scores at 1, 2, 3, 7, 14, and 30 days after initial archwire placement. Outcomes assessment was blinded and followed the intention-to-treat principle. One hundred forty-three (95.30%), 145 (96.70%), and 141 (94.00%) individuals in the cognitive behavioral therapy, the ibuprofen, and the control groups, respectively, completed the one-month follow-up evaluations. Those in the cognitive behavioral therapy group showed a greater decrease in mean VAS scores than did those in the control group over the previous five time-points (p < 0.001). Cognitive behavioral therapy was shown to be effective in pain control during the initial stage of orthodontic treatment. The study registration number was ChiCTR-TRC-00000556.
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Affiliation(s)
- J Wang
- State Key Laboratory of Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu, P.R. China
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Lin Y, Qian Z. Editorial [Hot Topic: Absorption, Pharmacokinetics and Disposition of Biodegradable Nanoscale Preparations (Guest Editors: ZhiYong Qian and YunFeng Lin)]. Curr Drug Metab 2012; 13:337. [DOI: 10.2174/138920012800166599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Grottkau BE, Chen XR, Friedrich CC, Yang XM, Jing W, Wu Y, Cai XX, Liu YR, Huang YD, Lin YF. DAPT enhances the apoptosis of human tongue carcinoma cells. Int J Oral Sci 2010; 1:81-9. [PMID: 20687300 PMCID: PMC3735796 DOI: 10.4248/ijos.08025] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Aim To investigate the effect of DAPT (γ-secretase inhibitor) on the growth of human tongue carcinoma cells and to determine the molecular mechanism to enable the potential application of DAPT to the treatment of tongue carcinoma. Methodology Human tongue carcinoma Tca8113 cells were cultured with DAPT. Cell growth was determined using Indigotic Reduction method. The cell cycle and apoptosis were analyzed by flow cytometry. Real-time PCR and Immuno-Fluorescence (IF) were employed to determine the intracellular expression levels. Results DAPT inhibited the growth of human tongue carcinoma Tca8113 cells by inducing G0–G1 cell cycle arrest and apoptosis. The mRNA levels of Hairy/Enhancer of Split-1 (Hes-1), a target of Notch activation, were reduced by DAPT in a dose-dependent manner. Coincident with this observation, DAPT induced a dose-dependent promotion of constitutive Caspase-3 in Tca8113 cells. Conclusion DAPT may have a therapeutic value for human tongue carcinoma. Moreover, the effects of DAPT in tumor inhibition may arise partly via the modulation of Notch-1 and Caspase-3.
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Affiliation(s)
- Brian E Grottkau
- Department of Orthopaedic Surgery, Mass General Hospital for Children, Pediatric Orthopaedic Laboratory for Tissue Engineering, Harvard Medical School, Boston, USA
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Lin YF, Wu ZY, Lin KC, Chen CC, Jian WB, Chen FR, Kai JJ. Nanocontact resistance and structural disorder induced resistivity variation in metallic metal-oxide nanowires. Nanotechnology 2009; 20:455401. [PMID: 19822926 DOI: 10.1088/0957-4484/20/45/455401] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Several systems of metallic metal-oxide nanowires (NWs), including pure RuO2 and as-implanted and annealed Ru(0.98)Cu(0.02)O2 and Ru(0.93)Cu(0.07)O2 NWs, have been employed in two-probe electrical characterizations by using a transmission electron microscope-scanning tunneling microscope technique with a gold tip. Thermal, mechanical, and electron beam exposing treatments are consecutively applied to reduce the electrical contact resistance, generated from the interface between the NW and the gold tip, so as to evaluate the intrinsic NW resistance. It is found that the residual contact resistance cannot be entirely removed. For each system of metallic metal-oxide NWs, several tens of NWs are applied to electrical characterizations and the total resistances unveil a linear dependence on the ratio of the length to the area of the NWs. As a result, the average resistivity and the contact resistance of the metallic metal-oxide NWs could be evaluated at room temperatures. The average resistivities of pure RuO2 NWs agree well with the results obtained from standard two- and four-probe electrical-transport measurements. In addition, the as-implanted Cu-RuO2 NWs reveal disordered crystalline structures in high-resolution TEM images and give higher resistivities in comparison with that of pure RuO2 NWs. The residual contact resistances of all kinds of metallic metal-oxide NWs unveil, more surprisingly, an approximation value of several kilohms, even though the average resistivities of these NWs change by more than one order of magnitude. It is argued that the ductile gold tip makes one or more soft contacts on the stiff metal-oxide NWs with nanometer roughness and the nanocontacts on the NWs contribute to the electrical contact resistance.
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Affiliation(s)
- Y F Lin
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
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Abstract
OBJECTIVES In this study, a group of cells that expressed both osteogenic and adipogenic characters was identified from murine adipose stromal cells. MATERIALS AND METHODS These cells could be enriched in the Sca-1-1 population and express both osteogenic and adipogenic genes. Osteogenic induction enhanced expression of osteogenic genes and inhibited expression of adipogenic genes, while adipogenic induction enhanced expression of adipogenic genes and inhibited expression of osteogenic genes. These cells have been called osteo-adipo progenitors (OAPs). RESULTS OAPs expressed transcription factor runt-related transcription factor 2 (RUNX2) and peroxisome proliferator-activated receptor-gamma (PPAR-gamma) proteins in cytoplasm. When OAPs were cultured in adipogenic medium, PPAR-gamma moved to the nucleus and the cells differentiated into adipocytes, while the RUNX2 remained in the cytoplasm. In contrast, when OAPs were cultured in osteogenic medium, RUNX2 moved to the nucleus and the cells differentiated to osteocytes, while the PPAR-gamma remained in the cytoplasm. CONCLUSIONS These experiments suggest that osteoblasts and adipocytes share a common predecessor, the OAP, in murine adipose stromal cells.
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Affiliation(s)
- Y F Lin
- State Key Laboratory of Oral Diseases, Department of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu, China
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Nie X, Jin Y, Long J, Wu L, Jing W, Lin YF, Tian WD. [Construction of tissue culture model in vitro and investigation of transforming growth factor promoting pulp fibroblast to differentiate into the odontoblast]. Sichuan Da Xue Xue Bao Yi Xue Ban 2008; 39:283-285. [PMID: 18630704] [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: 05/26/2023]
Abstract
OBJECTIVE To construct the tissue culture model in vitro, and investigate the potential of dental pulp fibroblast differentiating into the odontoblast and the promoting role of transforming growth factor beta1 (TGF-beta1) on it. METHODS Human pulps were cultured for 3, 7, 14 and 21 days on bone matrix gelatin (BMG) in DMEM cultural medium supplemented with TGF-beta1. The characteristics of matrix were studied through toluidine blue and Mallory stain. Meanwhile, the expression of dentin salivary protein (DSP) on the pulp cells was investigated with immunohistochemical staining. RESULTS This experiment found that the pulp tissue in vitro were able to develop into more progressive stage, and some pulp fibroblast cells to differentiate into odontoblast-like cells. Toluidine blue and Mallory staining analysis revealed the localized deposition of mineralized bone-dentin matrix that was detected at the site of dental pulp cells. Immunohistochemical analysis proved that the DSP synthesized in these cells with the presence of TGF-beta1. CONCLUSION The results demonstrate that this culture condition can maintain the phenotype of human pulp tissue. The model of organ culture is suitable to study the development of pulp tissue in vitro. TGF-beta1 can promote the potential of pulp cell into odontoblast, which provides an academic basis for tooth repair and regeneration.
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Affiliation(s)
- Xin Nie
- State Key Laboratory of Oral Diseases, West China Stomatological Hospital, Sichuan University, Chengdu 610041, China
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Nie X, Jin Y, Long J, Wu L, Jing W, Lin YF, Tian WD. [Experimental study on the development of tissue-engineered tooth germ with heterotopic allotransplantation]. Sichuan Da Xue Xue Bao Yi Xue Ban 2008; 39:279-282. [PMID: 18630703] [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: 05/26/2023]
Abstract
OBJECTIVE To compare the growth and development of tissue engineered tooth germ implanted into different tissues, and explore a suitable growing environment for the tissue engineered teeth in vivo. METHODS SD rat/porcine tooth germ cells from postnatal 4 days were used as seeding cells, which combined various scaffolding biomaterials to construct the compound with tissue engineered teeth. The allografts were implanted into renal subcapsule, the mesenteries and subcutaneous tissues. Then, the implants were retrieved at special time points for histological analysis. RESULTS Further developments were not observed in the graft implanted into mesenteries and subcutaneous tissues. Partial grafts were fallen off and lost from the subcutaneous tissues after implanted, and there were obvious lymphocyte infiltrations in the mesenteries. Moreover, the enamel and pulp-dentin complex were observed within the graft implanted in the subrenal capsule, which indicated there to be good condition. CONCLUSION The subrenal capsule can provide a promising implantation environment for the further growth of allogeneic tissue engineered tooth germ, and the subrenal capsule implantation can be used as a new alternative method for tissue-engineering tooth in vivo.
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Affiliation(s)
- Xin Nie
- Laboratory of Oral Diseases, West China Stomatological Hospital, Sichuan University, Chengdu 610041, China
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30
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Li ZY, Chen L, Liu L, Lin YF, Li SW, Tian WD. Odontogenic potential of bone marrow mesenchymal stem cells. J Oral Maxillofac Surg 2007; 65:494-500. [PMID: 17307598 DOI: 10.1016/j.joms.2006.09.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2005] [Revised: 07/22/2006] [Accepted: 09/28/2006] [Indexed: 12/30/2022]
Abstract
PURPOSE This study aimed to investigate the odontogenic potential of bone marrow mesenchymal stem cells (BM-MSCs) for seeding in tooth regeneration. MATERIALS AND METHODS In this study, BM-MSCs were co-cultured with oral epithelial cells derived from rat embryos. Expression of the odontogenic genes Pax9, DMP1, and DSPP was detected by the reverse-transcription polymerase chain reaction (RT-PCR) technique. To further characterize the odontogenic potential of BM-MSCs, the gold standard in vivo transplantation system was used. RESULTS The results revealed that Pax9, DMP1, and DSPP expression was detected by RT-PCR only after co-culture of BM-MSCs and oral epithelial cells derived from embryos age E11.5. Histological analyses of the BM-MSCs/epithelial cell mass demonstrated the presence of tooth-like structures. CONCLUSIONS The series of experiments both in vitro and in vivo demonstrated that BM-MSCs can differentiate into functional odontoblast-like cells. This implies that BM-MSCs may become a novel source of cells for seeding in tooth regeneration research.
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Affiliation(s)
- Zhi-Yong Li
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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Duan RP, Wu L, Lin YF, Liu L, Tian W. [The gene expression patterns of bone-marrow mesenchymal stem cells under different osteogenic induction]. Sichuan Da Xue Xue Bao Yi Xue Ban 2006; 37:856-9. [PMID: 17236579] [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: 05/13/2023]
Abstract
OBJECTIVE To investigate the molecular mechanism of osteogenetic differentiation of bone-marrow mesenchymal stem cells (BMSCs) and the probability using the BMSCs to gene therapy for bone fractures. METHODS By gradient centrifugation and adherence to the culture plastic, the MSCs were separated and purified from mouse bone marrow. The BMSCs then were cultured and sub-cultured in the osteogenetic medium (100 nmol/L Dexamethasone, 10 mmol/L beta-glycerophosphate and 50 mg/mL ascorbic acid, osteogenic supplements, OS-medium) or the recombinant human bone morphogenetic protein-2 (rhBMP-2, 500 ng/mL) for the mineralized inductions of osteogenesis, and stained by alizarin red in inducing week 1 and 2 for the identification of calcium nodule formed. The gene expressions of Runx2, Osx, OCN, and Col I were detected by RT-PCR on day 1, 2 and 3 after doing the osteogenetic inductions. RESULTS The BMSCs induced by OS-medium and rhBMP-2 were both of positive Ca nodules with alizarin red. However, the Ca nodule induced by OS-medium formed in 1 inducing week, but the one done by rhBMP-2 occurred in 2 inducing weeks, which meant it was a late for one week. In the OS-group, the mRNA of Runx2 could not be detected on inducing day 1, 2 and 3, but the Osx mRNA appeared on inducing day 2 and 3, and also the mRNAs of OCN and Col I could be detected in all the three inducing days. In rhBMP-2 group, the Runx2 gene expressed on inducing day 2, the Osx gene expressed on inducing day 2 and 3, the OCN and Col I genes expressed on inducing day 1, 2 and 3. CONCLUSION The BMSCs induced by OS-medium are more likely to form bone nodules than that of rhBMP-2, because of their simpler mechanisms to differentiate into osteoblasts.
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Affiliation(s)
- Rui-Ping Duan
- Department of Oral and Maxillofacial Surgery, West China Stomatological Hospital, Sichuan University, Chengdu 610041, China
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Wu CC, Liao TN, Lu KC, Chen JS, Chu P, Lin SH, Chuang CH, Lin YF. Apoptotic markers on lymphocytes and monocytes are unchanged during single hemodialysis sessions using either regenerated cellulose or polysulfone membranes. Clin Nephrol 2005; 64:198-204. [PMID: 16175944 DOI: 10.5414/cnp64198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND There is an increased rate of apoptosis of peripheral blood mononuclear cells (PBMCs) in patients undergoing hemodialysis (HD), but little is known about how different dialysis membranes may contribute to the process. We, therefore, studied the influence of two different dialysis membranes on apoptotic markers during HD. METHODS 8 healthy controls and 8 patients on regular HD 3 times per week were enrolled in this cross-controlled study. Patients received HD using polysulfone and then regenerated cellulose dialysis membranes for one week each, sequentially. Serum was collected for C-reactive protein (CRP) detection; flow cytometry with dual antibody staining was used to measure the apoptotic markers Fas (CD95), FasL (CD 178) and TNF-R2 (CD120b) in T cells (CD3+), B cells (CD19+), and monocytes (CD14+) at 0, 15, 120 and 240 min after starting HD. We also measured total leukocyte numbers and differential white cell counts. RESULTS Hemodialysis patients revealed lymphocytopenia, monocytopenia, higher CRP levels and higher Fas and TNF-R2 expression on lymphocytes and monocytes at baseline when compared with normal controls. Leukocyte numbers, including neutrophils, lymphocytes and monocytes, dropped significantly after 15 min of dialysis. There were no significant differences in Fas levels during hemodialysis on T and B lymphocytes or on monocytes. T lymphocyte FasL (CD 178) levels remained unchanged throughout the process. There was a significantly lower overall level of CD120b at 15 min of HD, whereas this marker was higher on monocytes after dialysis. There were no significant differences in the levels of apoptotic markers between the two membranes. CONCLUSION Our results suggest that uremia itself contributes to PBMC apoptosis. The two different dialysis membranes used in this study did not influence apoptotic markers on PBMCs significantly, but increased TNF-R2 expression on monocytes during a single dialysis session.
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Affiliation(s)
- C C Wu
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
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Lin YF, Chang SJ, Yang JR, Lee YP, Hsu AL. Effects of supplemental vitamin E during the mature period on the reproduction performance of Taiwan Native Chicken cockerels. Br Poult Sci 2005; 46:366-73. [PMID: 16050192 DOI: 10.1080/00071660500098186] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
One-day-old Taiwan native male chicks were fed with maize-soybean rearing diets without supplemental vitamin E to 23 weeks of age. From 23 to 52 weeks of age, the cockerels (n = 90) were assigned at random to 5 dietary treatments and fed with maize-soybean diets supplemented with 0, 20, 40, 80 and 160 mg/kg of vitamin E (dl-alpha-tocopherol acetate). Pullets (225) of the same age were fed with standard diets throughout. They were artificially inseminated with one dose of 0.04 ml/bird intact and 5-fold diluted pooled semen at 31 to 43 weeks of age and at 49 weeks of age, respectively. The criteria evaluated included: semen quality, fertility and maximum and effective duration of fertility, blood characteristics, body and testes weight. Supplemental vitamin E did not affect cockerels' effective duration of fertility and percentage of fertility. However, when pullets were inseminated with diluted semen, supplementing 160 mg/kg vitamin E increased the maximum duration of fertility at 49 weeks of age. Cockerels receiving 40 to 160mg/kg supplements had higher sperm viability and motility after 39 weeks of age and those fed 80 mg/kg had higher sperm concentration at 39 weeks of age. Cockerels receiving supplements of more than 40 mg/kg vitamin E had higher body weight gain. Plasma cholesterol and testosterone were not affected by supplemental vitamin E. However, plasma luteinising hormone (LH) concentration was lower in cockerels fed 160 mg/kg. Lack of supplemental vitamin E over 39 weeks was associated with lower semen quality but did not reduce the proportion of fertile eggs laid by inseminated hens, perhaps because the insemination dose compensated for low sperm quality. We found that the maximum duration of fertility might be improved by supplementing 160 mg/kg vitamin E at 49 weeks of age.
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Affiliation(s)
- Y F Lin
- The Livestock Research Institute, Council of Agriculture, Tainan, Taiwan
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Abstract
1. One-day-old Taiwan Native Breeder female chicks were fed on maize/soybean growing diets without supplemental vitamin E from hatch to 17 weeks of age. After 17 weeks the birds (n = 300) were randomly assigned to 5 dietary treatments and fed on maize/soybean laying diets supplemented with 0, 40, 80, 120 and 160 mg/kg of vitamin E (dl-alpha-tocopherol acetate), respectively, until 46 weeks of age. The variates measured included: age at first egg, feed consumption (FC), feed efficiency (FE), egg production (EP), egg weight (EW), egg specific gravity (ESG), eggshell strength (ESS), fertility and hatchability. 2. The addition of 120mg/kg of vitamin E lowered the first EW (P<0.05); however, there was no significant difference in the age or body weight (BW) of pullets at first egg or mortality rate to 46 weeks of age among the treatments. FE and egg mass were improved (P<0.05) in pullets fed 80 mg/kg of supplemental vitamin E. A significant increase in EP was observed after peak EP in pullets given 80 mg/kg of supplemental vitamin E. However, this favourable effect decreased as supplemental vitamin E exceeded 80 mg/kg. 3. From 17 to 46 weeks of age, egg quality (ESG and ESS) decreased with age. However, there was no correlation between age and fertility or hatchability during the experimental period, suggesting that egg quality is more age-sensitive than reproductive performance for breeder pullets. 4. Compared with the control, fertility and hatchability of all eggs set for the treatment with 80 mg/kg supplemental vitamin E increased by 7.7 and 13.4%, respectively. There was no difference in the hatchability of fertile eggs. 5. These results suggest that using supplemental vitamin E during the laying period can improve the reproductive performance of breeder pullets. The addition of 80 mg/kg of vitamin E obtained the best performance in EP, egg mass, FE (feed/egg), hatchability and fertility.
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Affiliation(s)
- Y F Lin
- Livestock Research Institute, Council of Agriculture, Tainan, Taiwan
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Li ZY, Tian WD, Liu L, Chen XZ, Lin YF, Yan ZB, Chen L, Li SW. [Study on multi-lineage potential of bone marrow mesenchymal stem cells derived from green fluorescent protein transgenic mice]. Hua Xi Kou Qiang Yi Xue Za Zhi 2005; 23:152-4. [PMID: 15952631] [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: 05/02/2023]
Abstract
OBJECTIVE To study the multi-lineage potential of bone marrow mesenchymal stem cells (MSCs) derived from transgenic mice with green fluorescent protein (GFP) gene in vitro. METHODS A 6-week-old GFP transgenic mouse was executed by dislocation of cervical vertebra, and the marrow in tibia and thighbone was washed out with asepsis. The limited cell strains of MSCs derived from GFP transgenic mice (GFP-MSCs) were obtained with density gradient centrifugation. The passage 3 GFP-MSCs were induced to differentiate into osteoblast, adippcyte, neuron with solution of calcium induction medium, adipogenic medium and neural induction medium respectively. After being calcium-induced, the activity of alkaline phosphatase on GFP-MSCs was determined by micro-plate reader, and alizarin red staining was performed to test the formation of calcium concentration. The adipo-induced MSCs were detected with oil red O staining. Immunocytochemical staining was performed to detect the expression of NSE on neuron-induced MSCs. RESULTS The ALP activity of GFP-MSCs heightened gradually along with being calcium-induced, and alizarin red staining showed positive. Oil red O staining of adipo-induced cells and NSE immunocytochemical staining of neuron-induced cells demonstrated positive. CONCLUSION The limited cell strain of GFP-MSCs possesses multi-lineage potential, which can be used as an efficient tracking facility for studying the mechanism of multi-lineage potential on the MSCs.
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Affiliation(s)
- Zhi-Yong Li
- Key Lab. of Oral Biomedical Engineering of Ministry of Education, Sichuan University, Chengdu 610041, China
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Chang YT, Shiao YM, Chin PJ, Liu YL, Chou FC, Wu S, Lin YF, Li LH, Lin MW, Liu HN, Tsai SF. Genetic polymorphisms of the HCR gene and a genomic segment in close proximity to HLA-C are associated with patients with psoriasis in Taiwan. Br J Dermatol 2004; 150:1104-11. [PMID: 15214895 DOI: 10.1111/j.1365-2133.2004.05972.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Although psoriasis vulgaris (PV) is strongly associated with HLA-Cw*0602, it has been proposed that the association of Cw*0602 is due to linkage disequilibrium and that other nearby genes are involved in PV susceptibility. The alpha-helix coiled-coil rod homologue (HCR) gene, located 110 kb telomeric to the HLA-C locus, is presumed to be one of the PV candidate genes. Recently, a 10-kb genomic segment, centromeric to HLA-C, defined by two new single nucleotide polymorphisms (SNPs) n.7*A and n.9*C, was found to have a stronger association with psoriasis than the HCR gene. Until now, no study of the association of the HCR gene, SNPs n.7, and n.9 has been conducted on Chinese patients with psoriasis. OBJECTIVES We aimed to determine whether the genetic polymorphisms of the HCR gene, SNPs n.7*A, and n.9*C were associated with an increased risk of psoriasis in Chinese patients. METHODS Using direct sequencing of the HCR gene and the genomic region containing SNPs n.7 and n.9, we investigated the HCR gene, SNPs n.7, and n.9 for disease association in 115 Chinese patients with psoriasis and 103 control subjects. The HCR SNPs were confirmed by denaturing high performance liquid chromatography. Genotyping for HLA-Cw*0602 was also carried out using sequence-based typing. RESULTS We observed a different allelic distribution between patient and control groups at nucleotide positions 386, 404, 1802 and 2406 of the HCR gene, and SNPs n.7, and n.9. The associations were much stronger in early onset PV patients (for HCR-386*T and HCR-404*T, odds ratio = 5.63, Pc < 0.0001). The HLA-Cw*0602 also displayed a similar association with PV (odds ratio = 5.4, Pc < 0.0001). Moreover, SNP n.7*A, SNP n.9*C, Cw*0602, HCR-386*T, HCR-404*T and HCR-1802*T were in linkage disequilibrium with each other. Haplotype-based association analysis showed SNP n.7*A-SNP n.9*C-Cw*0602-HCR-386*T-HCR-404*T-HCR-1802*T-HCR-2406*G as a major susceptibility haplotype in this Chinese population (for early onset patients, odds ratio = 5.15, Pc < 0.0001). CONCLUSIONS Our results indicate that the HCR gene, SNP n.7*A, and SNP n.9*C as well as Cw*0602 are major susceptibility markers for psoriasis in Chinese patients.
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Affiliation(s)
- Y T Chang
- Department of Dermatology, National Yang-Ming University, Taipei, Taiwan, Republic of China.
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Abstract
A young adult was diagnosed with steroid-resistant minimal change disease (MCD) without evidence of focal segmental glomerulosclerosis (FSGS) despite serial and detailed sectioning and screening of the renal biopsy. He received initial treatment with steroids and then cyclosporine plus low-dose steroids for 2 years. Renal function progressively deteriorated due to resistance to steroid and cyclosporine. Two months after initiation of hemodialysis, the patient received a living-related allogenic kidney transplant. However, recurrent nephrotic syndrome and renal insufficiency occurred after transplantation. In spite of aggressive treatment, renal function showed no significant improvement. The kidney graft was removed 2 weeks after transplantation. Serial sectioning and thorough sampling and screening revealed no evidence of FSGS, but light microscopy and electron microscopy showed the typical morphologic pattern of MCD, corresponding to the pretransplant diagnosis. We believe that this is the first reported case of recurrent MCD after renal transplant.
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Affiliation(s)
- C I Jan
- Department of Pathology, Tri-Service General Hospital, Cheng-Kung Road Sec, 2 No. 325, Taipei, Taiwan, R.O.C. 114.
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Tsai YT, Lin SH, Lee GC, Huen GG, Lin YF, Tsai CS. Arteriovenous fistula using transposed basilic vein in chronic hypotensive hemodialysis patients. Clin Nephrol 2002; 57:376-80. [PMID: 12036198 DOI: 10.5414/cnp57376] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIM Chronic hypotension is not uncommon in uremic patients on regular hemodialysis. This subset of patients often requires multiple operations to maintain their vascular access due to frequent thrombosis and occlusion of the arteriovenous fistula. Our aims was to assess whether surgical intervention with the brachial artery-transposed basilic vein fistula is effective in chronic hypotensive hemodialysis patients. MATERIALS AND METHODS Fifty-four hemodialysis patients with chronic hypotension were enrolled in this study. Most ofthem were referred from local hospitals. They were 23 men and 31 women. The brachial artery-transposed basilic vein arteriovenous fistula was performed in a period of 46 months at the teaching hospital. Primary patency was defined as the length of time from the fistula creation until the development of thrombosis or a complication that required operative revision ofthe fistula. Secondary patency was defined by whether the fistula could be salvaged by revision such that blood flow was maintained. RESULTS There was no technical failure and none of these patients died due to the surgical operation. The primary patency rate was 89.80% at 1 year, 73.08% at 2 years, and 64.710% at 3 years. The secondary patency rate was 95.92% at 1 year, 84.62% at 2 years, and 76.47% at 3 years. CONCLUSIONS Brachial artery-transposed basilic vein arteriovenous fistula may present good primary alternative vascular access in chronic hypotensive hemodialysis patients.
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Affiliation(s)
- Y T Tsai
- Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
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Lin SH, Hung YH, Lin YF. Severe hyponatremia as the presenting feature of clinically non-functional pituitary adenoma with hypopituitarism. Clin Nephrol 2002; 57:85-8. [PMID: 11837807 DOI: 10.5414/cnp57085] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hyponatremia can result from a wide range of causes. While hyponatremia is known to occur in patients with hypopituitarism, severe hyponatremia occurring as the presenting feature of hypopituitarism is very rare. We present two cases in which severe hyponatremia developed with weakness, light-headedness and seizure. The hyponatremia in these 2 cases mimicked the laboratory diagnostic criteria of a syndrome of inappropriate secretion of antidiuretic hormone (SIADH). However, the hormone studies displayed hypopituitarism. Hyponatremia was completely corrected after administering a supplement of prednisolone and L-thyroxine. Computerized tomography of the brain revealed an adenoma of the pituitary gland. These two cases illustrate that severe hyponatremia may be the presenting feature of clinically non-functional pituitary adenoma with hypopituitarism, which should be kept in mind in the differential diagnosis of hyponatremia mimicking SIADH.
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Affiliation(s)
- S H Lin
- Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC.
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Chu P, Lu KC, Lin YF. Acute correction of metabolic acidosis increases serum procollagen type I carboxyterminal propeptide in patients with chronic renal failure. J Formos Med Assoc 2001; 100:748-52. [PMID: 11802533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
BACKGROUND AND PURPOSE Previous in vitro study has shown that an acidic medium increases osteoclastic and inhibits osteoblastic activity. The present study sought to determine the role of alkali therapy in osteoblast function in patients with chronic renal failure by assessing the serum concentration of procollagen type I carboxyterminal propeptide (PICP), a marker of bone formation, before and after bicarbonate infusion. PATIENTS AND METHODS Eighteen patients with chronic renal failure (creatinine clearance 12 +/- 6.6 mL/min) associated with mild to moderate metabolic acidosis were enrolled in this study. None had undergone dialysis. Metabolic acidosis was corrected by continuous bicarbonate infusion while plasma ionized calcium was clamped at the preinfusion level by calcium gluconate infusion throughout the procedure. RESULTS After bicarbonate infusion, there were significant increases in plasma pH (7.31 +/- 0.04 to 7.40 +/- 0.03, p < 0.001), bicarbonate concentration (18.46 +/- 2.49 to 23.66 +/- 2.72, p < 0.001), serum total calcium concentration (2.01 +/- 0.24 to 2.12 +/- 0.24 mmol/L, p < 0.001), and PICP concentration (137.3 +/- 56.25 to 159.6 +/- 57.30 micrograms/L, p < 0.05), whereas serum parathyroid hormone concentrations assessed by radioimmunoassay decreased significantly (153.7 +/- 88.6 to 111.5 +/- 78.7, p < 0.001). Serum ionized calcium concentrations showed no significant difference before and after bicarbonate infusion. CONCLUSION These results suggest that acute correction of metabolic acidosis improves osteoblast function and appear to underline the importance of maintaining normal acid-base homeostasis in chronic renal failure.
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Affiliation(s)
- P Chu
- Division of Nephrology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
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Lin CH, Lin YF, Chang MC, Wu CH, Ho YS, Lee HM. Advanced glycosylation end products induce nitric oxide synthase expression in C6 glioma cells: involvement of a p38 MAP kinase-dependent mechanism. Life Sci 2001; 69:2503-15. [PMID: 11693258 DOI: 10.1016/s0024-3205(01)01330-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The mitogen-activated protein kinase (MAPK) pathway is believed to function as an important mediator of inducible nitric oxide synthase (iNOS) expression. In the present study, we investigated the role of the p38 MAPK signaling pathway in advanced glycosylation end products (AGEs)-induced iNOS expression in C6 glioma cells. AGEs caused a dose-dependent increase of nitrite accumulation in C6 glioma cells. The AGEs-stimulated nitrite production from C6 glioma cells was inhibited by actinomycin D, cyclohexamide, and the NO synthase inhibitor, Nomega-nitro-L-arginine methyl ester (L-NAME), suggesting that the increase of AGEs-induced nitrite release is due to iNOS up-regulation. Consistently, treatment of C6 glioma cells with AGEs induced iNOS protein expression. AGEs-stimulated nitrite production was inhibited by pretreatment of C6 glioma cells with anti-AGEs antibodies (1:100 or 1:50). The tyrosine kinase inhibitor (genistein and tyrphostin), the Ras-farnesyl transferase inhibitor (FPT inhibitor-II), or the p38 MAPK inhibitor (SB203580) suppressed AGEs-induced iNOS expression and nitrite release from C6 glioma cells. AGEs activated p38 MAPK in C6 glioma cells, and this effect was blocked by genistein (20 microM), tyrphostin (30 microM), FPT inhibitor-II (20 microM), and SB203580 (10 microM). Taken together, our data suggest that AGEs may activate the pathways of tyrosine kinase and Ras to induce p38 MAPK activation, which in turn induces iNOS expression and NO production in C6 glioma cells.
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Affiliation(s)
- C H Lin
- Graduate Institute of Biomedical Technology, Taipei Medical University, Taiwan, ROC
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Yi BA, Minor DL, Lin YF, Jan YN, Jan LY. Controlling potassium channel activities: Interplay between the membrane and intracellular factors. Proc Natl Acad Sci U S A 2001; 98:11016-23. [PMID: 11572962 PMCID: PMC58676 DOI: 10.1073/pnas.191351798] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Neural signaling is based on the regulated timing and extent of channel opening; therefore, it is important to understand how ion channels open and close in response to neurotransmitters and intracellular messengers. Here, we examine this question for potassium channels, an extraordinarily diverse group of ion channels. Voltage-gated potassium (Kv) channels control action-potential waveforms and neuronal firing patterns by opening and closing in response to membrane-potential changes. These effects can be strongly modulated by cytoplasmic factors such as kinases, phosphatases, and small GTPases. A Kv alpha subunit contains six transmembrane segments, including an intrinsic voltage sensor. In contrast, inwardly rectifying potassium (Kir) channels have just two transmembrane segments in each of its four pore-lining alpha subunits. A variety of intracellular second messengers mediate transmitter and metabolic regulation of Kir channels. For example, Kir3 (GIRK) channels open on binding to the G protein betagamma subunits, thereby mediating slow inhibitory postsynaptic potentials in the brain. Our structure-based functional analysis on the cytoplasmic N-terminal tetramerization domain T1 of the voltage-gated channel, Kv1.2, uncovered a new function for this domain, modulation of voltage gating, and suggested a possible means of communication between second messenger pathways and Kv channels. A yeast screen for active Kir3.2 channels subjected to random mutagenesis has identified residues in the transmembrane segments that are crucial for controlling the opening of Kir3.2 channels. The identification of structural elements involved in potassium channel gating in these systems highlights principles that may be important in the regulation of other types of channels.
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Affiliation(s)
- B A Yi
- Department of Physiology and Biochemistry, Howard Hughes Medical Institute, University of California, San Francisco, CA 94143, USA
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Lin YF, Jing SR. Characterization of denitrification and nitrification in a step-feed alternating anoxic-oxic sequencing batch reactor. Water Environ Res 2001; 73:526-533. [PMID: 11765988 DOI: 10.2175/106143001x139588] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study was conducted to characterize the denitrification and nitrification in a bench-scale sequencing batch reactor operating with a three-stage, alternating anoxic-oxic sequence and step feed (SAOSBR) for treating synthetic wastewater. The results of long-term operation and dynamic studies showed that the SAOSBR increased the availability of organic matter in wastewater for exogenous denitrification in anoxic periods, and subsequently allowed nitrification to occur under a lower organic loading in oxic periods. Comparatively high kinetic rates of 1.2 to 6.6 mg nitrate/g mixed liquor suspended solids (MLSS) x h for denitrification and 1.0 to 2.8 mg nitrogen/g MLSS x h for nitrification were found in dynamic studies. With sufficient influent organics and alkalinity, complete denitrification and full nitrification could be achieved sequentially in the alternating anoxic and oxic periods, resulting in an average total nitrogen removal efficiency up to approximately 90%. Alkalinity recovery because of exogenous denitrification was experienced, and a minimum influent alkalinity to total Kjeldahl nitrogen (TKN) ratio of 2.4 was required to reach complete TKN removal. The pH value would be a better parameter other than oxidation-reduction potential or dissolved oxgyen to determine the completeness of nitrification and denitrification in the SAOSBR.
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Affiliation(s)
- Y F Lin
- Department of Environmental Engineering and Health, Chia-Nan University of Pharmacy and Science, Tainan, Taiwan, Republic of China.
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Abstract
It is not uncommon for patients to present to the emergency room with severe weakness and a markedly low plasma potassium concentration. We attempted to identify useful clues to the diagnosis of hypokalaemic periodic paralysis (HPP), because its acute treatment aims are unique. We retrospectively reviewed charts over a 10-year period: HPP was the initial diagnosis in 97 patients. Mean patient age was 29+/-1.1 and the male:female ratio was 77:20. When the final diagnosis was HPP (n=73), the acid-base state was normal, the urine K(+) concentration was low, and the transtubular K(+) concentration gradient (TTKG) was <3. In patients with thyrotoxic periodic paralysis (TPP) (n=39), hypokalaemia was very commonly accompanied by hypophosphataemia (1.9+/-0.1 mg/dl). A clinical diagnosis of sporadic periodic paralysis (SPP) was made if hyperthyroidism and a family history of HPP were both absent (n=29). One subgroup of patients with HPP had a severe degree of hypernatraemia (167+/-5.0 mmol/l, n=3). There were only two patients with familial periodic paralysis (FPP). In 24 patients, the initial diagnosis was HPP, but subsequent studies failed to confirm this diagnosis. Each of these patients had an acid-base disorder, a high rate of renal K(+) excretion in the presence of hypokalaemia, and a TTKG of close to 7. With respect to therapy, much less K(+) was given to patients with HPP, yet 1:3 subsequently had a plasma K(+) concentration that eventually exceeded 5.0 mmol/l. Using plasma acid-base status, phosphate and K(+) excretion parameters allows a presumptive diagnosis of HPP with more confidence in the emergency room.
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Affiliation(s)
- S H Lin
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital National Defense National Center, Taipei, Taiwan.
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Abstract
GIRK2 is a major contributor to G protein-activated inward rectifier potassium channels in the mammalian brain. How GIRK channels open upon contact with Gbetagamma remains unknown. Using a yeast genetic screen to select constitutively active mutants from a randomly mutagenized GIRK2 library, we identified five gating mutations at four residues in the transmembrane domain. Further mutagenesis indicates that GIRK channel opening involves a rotation of the transmembrane segments, bringing one of these residues (V188) to a pore-lining position in the open conformation. Combined with double-mutant studies, these findings suggest that GIRK channels gate by moving from the open conformation inferred from our yeast study of Kir2.1 to a closed conformation perhaps resembling the known KcsA structure.
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Affiliation(s)
- B A Yi
- Departments of Physiology and Biochemistry, Howard Hughes Medical Institute, University of California, San Francisco, 533 Parnassus Avenue, San Francisco, CA 94143, USA
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Lin SH, Lin YF. Propranolol rapidly reverses paralysis, hypokalemia, and hypophosphatemia in thyrotoxic periodic paralysis. Am J Kidney Dis 2001; 37:620-3. [PMID: 11228188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Hypokalemia and hypophosphatemia are commonly encountered during paralysis in patients with thyrotoxic periodic paralysis (TPP) and may contribute to neuromuscular manifestations. Potassium and phosphate supplements have been recommended to hasten recovery and prevent cardiopulmonary complications. However, this recommendation has not yet proven efficacious. Hyperadrenergic activity has been implicated in the pathogenesis of TPP. We tested whether nonselective beta-blockers could terminate neuromuscular symptoms rapidly while reducing an intracellular shift of potassium and phosphate. We describe two patients who had an acute attack of TPP with characteristic hypokalemia and hypophosphatemia associated with low urinary potassium and phosphate excretion. After oral propranolol, 3 mg/kg, serum potassium and phosphate concentrations increased promptly in 2 hours in both patients, and there was complete amelioration of paralysis. No rebound hyperkalemia or hyperphosphatemia was detected. Given their efficacy in this pilot study, they should be considered as a first-line therapy for TPP.
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Affiliation(s)
- S H Lin
- Department of Medicine, Division of Nephrology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC.
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Abstract
Little is known about the identity of endoplasmic reticulum (ER) export signals and how they are used to regulate the number of proteins on the cell surface. Here, we describe two ER export signals that profoundly altered the steady-state distribution of potassium channels and were required for channel localization to the plasma membrane. When transferred to other potassium channels or a G protein-coupled receptor, these ER export signals increased the number of functional proteins on the cell surface. Thus, ER export of membrane proteins is not necessarily limited by folding or assembly, but may be under the control of specific export signals.
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Affiliation(s)
- D Ma
- Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94143-0725, USA
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Lin YF, Jing SR, Lee DY. Enhancing the dewaterability and amenability of sludge for subsequent stabilization processes by using organic waste solids as conditioners. J Environ Sci Health A Tox Hazard Subst Environ Eng 2001; 36:191-202. [PMID: 11382020 DOI: 10.1081/ese-100102617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Dual-material conditioning of sludge was evaluated using a chemical conditioner (either alum or ferric chloride), followed by a physical conditioner (either wood chips or wheat dregs). The combined effects of the conditioners on the dewaterability of the sludge with vacuum filtration and the amenability of the resulting sludge cake for subsequent stabilization processes were investigated. Results showed that the specific resistance of the conditioned sludge was effectively reduced when the dose of wood chips or wheat dregs was increased in each dual-material combination. From the results of analysis of solids in the cake, the filtered sludge cake with either wood chips or wheat dregs conditioning in higher dosage resulted in lower moisture and higher volatile combustible solids content. Accordingly, sludge conditioning with these two materials substantially increased the heating value of the dewatered sludge. In addition, wood chips are the most widely used bulking agent, and wheat dregs could be suitable to act as amendments in sludge composting. These results indicate that these two organic waste solids could replace a significant portion of the chemicals now used for sludge conditioning to improve the dewaterability of sludge and the amenability of the resulting sludge cake for incineration and composting processes.
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Affiliation(s)
- Y F Lin
- Department of Environmental Engineering and Health, Chia-Nan College of Pharmacy and Science, Tainan, Taiwan 71710, R.O.C.
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Abstract
A Buchner filtration study was conducted to investigate the effect on sludge dewatering of adding organic waste solids (wood chips or wheat dregs) to sludge after chemical preconditioning (with ferric chloride or alum). Increasing the dose of wood chips or wheat dregs enhanced sludge filtration performance and increased the energy content of the filter cake, but did not consistently increase the total filtrate removed. The additional filtrate removal was found to balance the inert solids load only when the chemical preconditioner used did not result in sufficient coagulation of the sludge and the skeleton builder dose was low (< or = 90%). Accordingly, various dose ranges of wood chips and wheat dregs are suggested for different sludge management schemes.
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Affiliation(s)
- Y F Lin
- Department of Environmental Engineering and Health, Chia-Nan University of Pharmacy and Science, Tainan 71710, Taiwan, ROC.
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