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Fu D, Yang R, Wang Y, Guo X, Cheng C, Hua F. Nanocellulose-Enhanced, Easily Processable Cellulose-Based Flexible Pressure Sensor for Wearable Epidermal Sensing. ACS Appl Mater Interfaces 2024. [PMID: 38597296 DOI: 10.1021/acsami.4c03541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Flexible pressure sensors (FPSs) based on biomass materials have gained considerable attention for their potential in wearable electronics, human-machine interaction, and environmental protection. Herein, flexible silver nanowire-dual-cellulose paper (SNdCP) containing common cellulose fibers, cellulose nanofibers (CNFs), and silver nanowires (AgNWs) for FPSs was assembled by a facile papermaking strategy. Compared with bacterial cellulose (BC) and cellulose nanocrystals (CNCs), CNFs possess better dimensions and reinforcement, which enables the composite paper to exhibit better mechanical properties (tensile stress of 164.65 MPa) and electrical conductivity (11600 S·m-1), providing more possibilities for FPSs. Benefiting from these advantages, we construct an easily processable and sensitive human-interactive FPS based on a composite paper with high sensitivity (0.050 kPa-1), fast response/recovery time (158/95 ms), and exceptional stability (>1000 bending cycles), capable of responding to finger motions, voice recognition, and human pulses; through further employment as the array unit and a control circuit, the observed highly adaptive mechano-electric transformability and functions are well maintained. Overall, a facile and versatile strategy with the potential to provide clues for the fabrication of cellulose-based FPSs with outstanding performance was introduced.
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Affiliation(s)
- Danning Fu
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China
| | - Rendang Yang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China
| | - Yang Wang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Xiaohui Guo
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China
| | - Chen Cheng
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China
| | - Feiguo Hua
- Zhejiang Jinjiahao Green Nanomaterials Co., Ltd., Quzhou 324404, China
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Cao LY, Yan JR, Hua F, He H. [Research progress in the performance of clear aligner attachment materials]. Zhonghua Kou Qiang Yi Xue Za Zhi 2024; 59:105-109. [PMID: 38172070 DOI: 10.3760/cma.j.cn112144-20230804-00056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
For most patients undergoing clear aligner treatment, it could be necessary to bond multiple attachments on their tooth surfaces. The clear aligner attachment is designed to enhance aligner retention, transmit orthodontic forces, and make the programmed tooth movement more predictable. Materials such as restorative resin, orthodontic bonding adhesive, flowable resin, and resin-modified glass ionomer cement are currently used for attachment bonding. But there is currently no conclusion as to which material suits most. The objective of this review is to look into the studies published in recent years, in order to explore the optimal material option for making clear aligner attachments.
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Affiliation(s)
- L Y Cao
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - J R Yan
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - F Hua
- Center for Orthodontics and Pediatric Dentistry at Optics Valley Branch, School & Hospital of Stomatology, Wuhan University, Wuhan 430223, China
| | - H He
- Department of Orthodontics Division 1, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
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3
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Huang S, Wang X, Zhang Y, Meng Y, Hua F, Xia X. Water and oil-grease barrier properties of PVA/CNF/MBP/AKD composite coating on paper. Sci Rep 2023; 13:12292. [PMID: 37516731 PMCID: PMC10387061 DOI: 10.1038/s41598-023-38941-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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 07/17/2023] [Indexed: 07/31/2023] Open
Abstract
In this paper, three kinds of micro-nano bamboo powder (MBP) and alkyl ketene dimer (AKD) were added to the polyvinyl alcohol/cellulose nanofiber (PVA/CNF) coating to prepare PVA/CNF/MBP coated paper and PVA/CNF/M-MBP/AKD coated paper. The results showed that MBP improved the oleophobicity of PVA/CNF coating, and the grease resistance grade of PVA/CNF/B-MBP and PVA/CNF/M-MBP coated papers reached the highest level, with a kit number of 12. Among the PVA/CNF/MBP coated papers, the PVA/CNF/M-MBP coated paper has the best hydrophobic properties, with the water contact angle and Cobb value of 74° and 21.3 g/m2, respectively. In addition, when the AKD dosage was 0.2% in the PVA/CNF/M-MBP/AKD coating, the kit number of the coated paper was 11, the Cobb value was 15.2 g/m2, the water contact angle was 103°, and the tensile strength was found to increase slightly. Therefore, compared with PVA/CNF coated paper, PVA/CNF/M-MBP/AKD coated paper has good strength and excellent hydrophobic and oleophobic properties.
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Affiliation(s)
- Shancong Huang
- College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, 310000, Zhejiang, China
| | - Xiyun Wang
- College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, 310000, Zhejiang, China
| | - Yu Zhang
- Zhejiang Jinchang Specialty Paper Co., Ltd., Quzhou, 324404, Zhejiang, China
| | - Yu Meng
- Zhejiang Jinchang Specialty Paper Co., Ltd., Quzhou, 324404, Zhejiang, China
| | - Feiguo Hua
- Zhejiang Jinchang Specialty Paper Co., Ltd., Quzhou, 324404, Zhejiang, China
| | - Xinxing Xia
- College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, 310000, Zhejiang, China.
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4
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Huang S, Wang X, Zhang Y, Meng Y, Hua F, Xia X. Cellulose nanofibers/polyvinyl alcohol blends as an efficient coating to improve the hydrophobic and oleophobic properties of paper. Sci Rep 2022; 12:16148. [PMID: 36167752 PMCID: PMC9515203 DOI: 10.1038/s41598-022-20499-8] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 09/14/2022] [Indexed: 11/17/2022] Open
Abstract
The effect of cellulose nanofibers (CNFs)/polyvinyl alcohol (PVA) coating on the hydrophobic, oleophobic, and strength properties of paper were investigated. The results showed that the size of bamboo fibers (BFs) decreased significantly and the crystallinity increased significantly after biological enzyme treatment. The average length of CNFs obtained by high pressure homogenization was 2.4 µm, the diameter was 28.7 nm, and the crystallinity was 63.63%. When the coating weight of PVA/CNF was 2.0 g/m2 and the CNF dosage was increased from 0.0% to 3.0%, the paper grease resistance grade was increased from 7 to 9, the Cobb value was decreased from 22.68 ± 0.29 g/m2 to 18.37 ± 0.63 g/m2, the contact angle was increased from 67.82° to 93.56°, and the longitudinal and transverse tensile index were increased from 67.72 ± 0.21 N m/g and 37.63 ± 0.25 N m/g to 68.61 ± 0.55 N m/g and 40.71 ± 0.78 N m/g, respectively. When the CNF dosage was 3.0% and the coating weight of PVA/CNF was 4.0 g/m2, the grease resistance grade of the paper was 12, the Cobb value was 21.80 ± 0.39 g/m2, and the longitudinal and transverse tensile indices were 72.11 ± 0.43 N m/g and 42.58 ± 0.48 N m/g, respectively. In summary, the increase of CNFs can effectively improve the lipophobicity, hydrophobicity and tensile strength of the PVA coated paper.
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Affiliation(s)
- Shancong Huang
- College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China
| | - Xiyun Wang
- College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China
| | - Yu Zhang
- Zhejiang Jinchang Specialty Paper Co., Ltd., Quzhou, 324404, Zhejiang, China
| | - Yu Meng
- Zhejiang Jinchang Specialty Paper Co., Ltd., Quzhou, 324404, Zhejiang, China
| | - Feiguo Hua
- Zhejiang Jinchang Specialty Paper Co., Ltd., Quzhou, 324404, Zhejiang, China
| | - Xinxing Xia
- College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China.
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Wang W, Ma Y, Wang T, Ding K, Zhao W, Jiao L, Shu D, Li C, Hua F, Jiang H, Tong S, Yang S, Ni Y, Cheng B. Double-Layered Conductive Network Design of Flexible Strain Sensors for High Sensitivity and Wide Working Range. ACS Appl Mater Interfaces 2022; 14:36611-36621. [PMID: 35926517 DOI: 10.1021/acsami.2c08285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
For flexible strain sensors, the optimization between sensitivity and working range is a significant challenge due to the fact that high sensitivity and high working range are usually difficult to obtain at the same time. Herein, a breathable flexible strain sensor with a double-layered conductive network structure was designed and developed, which consists of a thermoplastic polyurethane (TPU)/carbon nanotube (CNT) layer (as a substrate layer) and a Ag nanowire (AgNW) layer. The TPU/CNT layer is made of electrospinning TPU with CNTs deposited onto the surface of TPU fibers, and the flexible TPU/CNT mat guarantees the integrity of the conductive path under a large strain. The AgNW layer was prepared by depositing different amounts of AgNWs on the surface of the TPU/CNT layer, and the high-conductivity AgNWs offer a low initial resistance. Benefitting from the synergistic two-layer structure, the as-obtained flexible strain sensor exhibits a very high sensitivity (up to 1477.7) and a very wide working range (up to 150%). Besides, the fabricated sensor exhibits fast response (88 ms), excellent dynamical stability (7000 cycles), and excellent breathability. The working mechanism of the strain sensor was further investigated using various techniques (microscopy, equivalent circuit, and thermal effects of current). Furthermore, the as-fabricated flexible strain sensors accurately detect the omnidirectional human motions, including subtle and large human motions. This work provides an efficient approach to achieve the optimization between high sensitivity and large working range of strain sensors, which may have great potential applications in health monitoring, body motion detection, and human-machine interactions.
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Affiliation(s)
- Wei Wang
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Yuying Ma
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Tianyi Wang
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Kai Ding
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Wei Zhao
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Long Jiao
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Dengkun Shu
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Chenyang Li
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Feiguo Hua
- Zhejiang Jinjiahao Green Nanomaterial Co., Ltd., Longyou 324404, China
- Zhejiang Jinchang Specialty Paper Co., Ltd., Longyou 324404, China
| | - Hong Jiang
- Jiangxi Changshuo Outdoor Leisured Articles Co.,Ltd, Shangrao 334000, China
| | - Shuhua Tong
- Zhejiang Jinchang Specialty Paper Co., Ltd., Longyou 324404, China
| | - Shuo Yang
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
- Zhejiang Jinchang Specialty Paper Co., Ltd., Longyou 324404, China
| | - Yonghao Ni
- Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
| | - Bowen Cheng
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin 300457, China
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Borazanci E, Schram AM, Garralda E, Brana I, Vieito Villar M, Spreafico A, Oliva M, Lakhani NJ, Hoffman K, Hallett RM, Maetzel D, Hua F, Hilbert J, Giblin P, Anido J, Kelly A, Vickers PJ, Wasserman R, Seoane J, Siu LL, Hyman DM, Hoff DV, Tabernero J. Phase I, first-in-human study of MSC-1 (AZD0171), a humanized anti-leukemia inhibitory factor monoclonal antibody, for advanced solid tumors. ESMO Open 2022; 7:100530. [PMID: 35921760 PMCID: PMC9434412 DOI: 10.1016/j.esmoop.2022.100530] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/26/2022] [Accepted: 06/09/2022] [Indexed: 11/17/2022] Open
Affiliation(s)
| | - A M Schram
- Memorial Sloan Kettering Cancer Center, New York, USA
| | - E Garralda
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona, Spain
| | - I Brana
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona, Spain
| | - M Vieito Villar
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona, Spain
| | - A Spreafico
- Princess Margaret Cancer Centre, Toronto, Canada
| | - M Oliva
- Princess Margaret Cancer Centre, Toronto, Canada
| | | | - K Hoffman
- Northern Biologics, Inc., Toronto, Canada
| | | | - D Maetzel
- Northern Biologics, Inc., Toronto, Canada
| | - F Hua
- Applied BioMath, Concord, USA
| | | | - P Giblin
- Northern Biologics, Inc., Toronto, Canada
| | - J Anido
- Northern Biologics, Inc., Toronto, Canada
| | - A Kelly
- Northern Biologics, Inc., Toronto, Canada
| | | | | | - J Seoane
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Universitat Autònoma de Barcelona (UAB), CIBERONC, Barcelona
| | - L L Siu
- Princess Margaret Cancer Centre, Toronto, Canada
| | - D M Hyman
- Memorial Sloan Kettering Cancer Center, New York, USA
| | | | - J Tabernero
- Vall d'Hebron Hospital Campus and Institute of Oncology (VHIO), Barcelona, Spain; UVic-UCC, IOB-Quiron, Barcelona, Spain
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7
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Fang X, Wu X, Levey C, Chen Z, Hua F, Zhang L. Spin in the Abstracts of Randomized Controlled Trials in Operative Dentistry: A Cross-sectional Analysis. Oper Dent 2022; 47:287-300. [PMID: 35776961 DOI: 10.2341/21-025-lit] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To assess the presence and characteristics of spin in recently published RCT abstracts in operative dentistry and to investigate potential factors associated with the presence of spin. METHODS AND MATERIALS The PubMed database was searched to identify parallel-group RCTs published between 2015 and 2019 in the field of operative dentistry, which compared two or more groups and had nonsignificant results for the primary outcome. Two authors evaluated independently the presence and characteristics of spin among these abstracts. Multivariable logistic regression analyses were conducted to identify factors associated with the presence of spin in the Results and the Conclusions sections, respectively. RESULTS A total of 77 RCT abstracts were included, among which 58 (75.3%) showed at least one type of spin. Spin was identified in the Results and Conclusions sections of 32 (41.6%) and 45 (58.4%) abstracts, respectively. 19 RCTs (24.7%) presented spin in both the Results and the Conclusions section of abstracts. The presence of spin in the Results section of abstracts was significantly associated with source of funding (OR=8.10; p=0.025) and number of treatment arms was associated with the presence of spin in the Conclusions section of abstracts (OR=5.66; p=0.005). CONCLUSION The occurrence rate of spin in the sample of operative dentistry RCTs abstracts is high.
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Affiliation(s)
- X Fang
- Xiaolin Fang, BDS, MSc, Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Department of Cariology and Endodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - X Wu
- Xinyu Wu, BDS, MSc, Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - C Levey
- Colin Levey, BMSc, BDS, PhD, School of Dentistry, University of Dundee, Dundee, UK
| | - Z Chen
- Zhi Chen, BDS, MSc, PhD, Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Department of Cariology and Endodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - F Hua
- *Fang Hua, BDS, MSc, PhD, Centre for Evidence-Based Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - L Zhang
- *Lu Zhang, BDS, MSc, PhD, Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China; Department of Cariology and Endodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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8
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Xiao L, Hua F, Knops JMH, Zhao X, Mishra C, Lovari S, Alexander JS, Weckworth B, Lu Z. Spatial separation of prey from livestock facilitates coexistence of a specialized large carnivore with human land use. Anim Conserv 2022. [DOI: 10.1111/acv.12769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L Xiao
- School of Life Sciences Peking University Beijing China
- Department of Health and Environmental Sciences Xi'an Jiaotong‐Liverpool University Suzhou China
| | - F Hua
- Institute of Ecology, College of Urban and Environmental Sciences Peking University Beijing China
| | - J M H Knops
- Department of Health and Environmental Sciences Xi'an Jiaotong‐Liverpool University Suzhou China
| | - X Zhao
- Shanshui Conservation Center Beijing China
| | - C Mishra
- Snow Leopard Trust Seattle WA USA
| | - S Lovari
- Department of Life Sciences University of Siena Siena Italy
| | | | | | - Z Lu
- School of Life Sciences Peking University Beijing China
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Zhao TT, Wang M, Yang Z, Zhang J, Hua F, He H. [Percentage of tonsil hypertrophy in orthodontic patients with different sagittal skeletal relationship]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:266-271. [PMID: 35280004 DOI: 10.3760/cma.j.cn112144-20210602-00279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the prevalence of tonsil hypertrophy in patients with different sagittal skeletal craniofacial patterns, as well as the correlation between tonsil hypertrophy and the type of skeletal pattern. Methods: Lateral cephalograms of patients who visited the Department of Orthodontics Division 1, School of Stomatology, Wuhan University during January to August, 2019 were retrospectively collected. Patients (children: age≥6 and ≤12 year; adults: age≥18 year) were divided into three groups according to the ANB (subspinale-nasion-supramental) angle: the skeletal class Ⅰ group (0°≤ANB≤4°), skeletal class Ⅱ group (ANB>4°) and skeletal class Ⅲ group (ANB<0°). Tonsil hypertrophy was diagnosed with lateral cephalogram by two specifically trained orthodontists independently, according to the Baroni's method. The between-group differences in tonsil hypertrophy prevalence were analyzed using chi-square tests with Bonferroni correction (α=0.017). Results: A total of 1 776 patients (593 children and 1 183 adults) were included, among which 672 (37.8%) were with class Ⅰ, 849 (47.8%) with class Ⅱ, and 255 (14.4%) with class Ⅲ skeletal pattern. The prevalence of tonsil hypertrophy in children was 66.3% (393/593). The proportion of children with tonsil hypertrophy in class Ⅲ group [87.0% (60/69)] were significantly higher than that in class Ⅰ [65.6% (145/221), χ²=11.56, P<0.017] and class Ⅱ [62.0% (188/303), χ²=15.69, P<0.017] groups. The prevalence of tonsil hypertrophy in adults was 23.2% (275/1 183). The proportion of adults with tonsil hypertrophy in class Ⅲ group [42.5% (79/186)] was significantly higher than that in class Ⅰ [19.1% (86/451), χ²=36.50, P<0.017] and class Ⅱ [20.2% (110/546), χ²=35.00, P<0.017] groups. However, there was no significant difference in the prevalence of tonsil hypertrophy between class Ⅰ and class Ⅱ groups for both children (χ²=0.70, P>0.017) and adults (χ²=0.18, P>0.017). Conclusions: The prevalence of tonsil hypertrophy in skeletal class Ⅲ patients was significantly higher than that in patients with skeletal class Ⅰ and Ⅱmalocclusion. Tonsil hypertrophy could be an important risk factor for skeletal class Ⅲ patients.
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Affiliation(s)
- T T Zhao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine Ministry of Education, School of Stomatology, Wuhan University, Wuhan 430079, China
| | - M Wang
- Department of Orthodontics Division 1, School of Stomatology, Wuhan University, Wuhan 430079, China
| | - Z Yang
- Department of Orthodontics Division 1, School of Stomatology, Wuhan University, Wuhan 430079, China
| | - J Zhang
- Department of Radiology, School of Stomatology, Wuhan University, Wuhan 430079, China
| | - F Hua
- Department of Orthodontics Division 1, School of Stomatology, Wuhan University, Wuhan 430079, China
| | - H He
- Department of Orthodontics Division 1, School of Stomatology, Wuhan University, Wuhan 430079, China
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10
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Yu J, Jin Y, Liu G, Hua F, Lv Y. Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption. J Appl Polym Sci 2022. [DOI: 10.1002/app.52130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jiangang Yu
- College of Chemical and Material Engineering Quzhou University Quzhou China
| | - Yi Jin
- College of Chemical and Material Engineering Quzhou University Quzhou China
| | - Guoqing Liu
- College of Chemical and Material Engineering Quzhou University Quzhou China
| | - Feiguo Hua
- Research and Development Center Zhejiang Jinjiahao Green Nanomaterial CO., Ltd. Quzhou China
| | - Yanwen Lv
- College of Chemical and Material Engineering Quzhou University Quzhou China
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Chen YH, Shen ZY, Huang HY, Yu YS, Ye WX, Hua F, Hu YQ, Yang BW, Shen H. [Comparison of early outcome between one-stage hybrid technique and frozen elephant thunk technique in the treatment of Stanford A aortic dissection involving the arch]. Zhonghua Yi Xue Za Zhi 2021; 101:3955-3960. [PMID: 34954998 DOI: 10.3760/cma.j.cn112137-20210531-01246] [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: 11/05/2022]
Abstract
Objective: To analyze the early outcome of one-stage hybrid technique in the treatment of Stanford type-A aortic dissection involving the arch and compare its therapeutic efficacy with the classical frozen elephant trunk technique (FET). Methods: A total of 106 patients with Stanford type-A aortic dissection involving the arch in Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University from October 2015 to October 2019 was collected. All patients in this group were treated with one-stage hybrid technique (modified arch debranching technique) without deep hypothermia circulation. Meanwhile, 30 patients with Stanford type A dissection involving the arch who underwent FET from January 2014 to September 2015 were collected. The therapeutic effects of the two surgical methods were analyzed and compared. Results: The age [M (Q1, Q3)] of 106 patients in hybrid group was 49.0 (40.0, 55.0) years, including 89 males and 17 females. The age [M(Q1, Q3)] of 30 patients in FET group was 49.5 (41.5, 65.3) years, including 24 males and 6 females. The time [M(Q1, Q3)] of using ventilator in hybrid group was 56.0 (38.0, 72.0) h, which was shorter than 127.0 (92.0, 145.0) h in FET group (P<0.001). The incidence of cerebral infarction in hybrid group was 2.8% (3 cases), which was lower than 13.3% (4 cases) in FET group (P=0.042); the incidence of postoperative renal insufficiency in hybrid group was 7.5% (8 cases), which was lower than 23.3% (7 cases) in FET group (P=0.023); the ICU time [M (Q1, Q3)] in hybrid group was 8.0 (6.0, 10.0) d, which was shorter than 14.0 (8.3, 24.0) d in FET group (P<0.001). Conclusion: Compared with FET, one-stage hybrid technology is safer and more effective in the treatment of Stanford type A aortic dissection involving the arch. Its short-term therapeutic efficacy appears good.
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Affiliation(s)
- Y H Chen
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Z Y Shen
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - H Y Huang
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Y S Yu
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - W X Ye
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - F Hua
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Y Q Hu
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - B W Yang
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - H Shen
- Department of Cardiac and Vascular Surgery, 1st Affiliated Hospital of Soochow University, Suzhou 215006, China
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Hua F, Jin L, Zhou XL, Cheng YQ. [Concomitant medullary and papillary thyroid carcinoma identified by fine needle aspiration: report of a case]. Zhonghua Bing Li Xue Za Zhi 2021; 50:1393-1395. [PMID: 34865435 DOI: 10.3760/cma.j.cn112151-20210330-00248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- F Hua
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
| | - L Jin
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
| | - X L Zhou
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
| | - Y Q Cheng
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
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Zhang W, Li Q, Hua F. Basal ganglia lesion and spinal dural granuloma caused by Treponema Pallidum: A case report. Rev Neurol (Paris) 2021; 178:271-273. [PMID: 34563379 DOI: 10.1016/j.neurol.2021.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 05/13/2021] [Accepted: 05/17/2021] [Indexed: 11/30/2022]
Affiliation(s)
- W Zhang
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221000 Jiangsu, China.
| | - Q Li
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221000 Jiangsu, China
| | - F Hua
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221000 Jiangsu, China
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Qin ZH, Huang XL, Tao LC, Hua F. [Diagnostic value of FNDC5 in patients with subclinical diabetic cardiomyopathy]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:687-693. [PMID: 34256436 DOI: 10.3760/cma.j.cn112148-20200624-00510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To estimate the diagnostic value of fibronectin type Ⅲ-domain containing protein 5 (FNDC5) in subclinical diabetic cardiomyopathy. Methods: A total of 94 patients with type 2 diabetes (T2DM), who were hospitalized from April 2018 to June 2019 in the Third Affiliated Hospital of Soochow University, were enrolled in this study. Patients were divided into T2DM with cardiac dysfunction (subclinical DCM) group (n=47) and T2DM without cardiac dysfunction (non-DCM) group (n=47) according to echocardiography and gated myocardial perfusion imaging results. Basic clinical data and serum FNDC5 level were compared between the two groups. Logistic regression analysis was used to establish predicting models and the diagnostic efficiency of established models was compared by ROC curve analysis. Results: Compared to non-DCM group, patients in subclinical DCM group were older, with longer duration of diabetes, and had higher levels of glycosylated hemoglobin A1c (HbA1c), total cholesterol (TC), triglyceride (TG) and low-density lipoprotein cholesterol (LDL-C) (all P<0.05). Serum FNDC5 level was significantly lower in subclinical DCM group than in non-DCM group (P<0.001). FNDC5 level was positively correlated with ventricular septal e'(r=0.451,P=0.005), mitral valve e'(r=0.291,P<0.001), the ratio of peak early diastolic trans-mitral flow velocity (E) to peak late diastolic trans-mitral flow velocity (A)(r=0.490,P=0.002), while negatively correlated with A(r=-0.399,P<0.001), the average ratio of E/e'(r=-0.490,P<0.001), tricuspid regurgitation velocity(r=-0.567,P<0.001), left atrial volume index(r=-0.491,P<0.001). Univariate ROC analysis showed that the diagnostic efficacy of FNDC5(AUC=0.940,95%CI 0.897-0.982)was superior to age(AUC=0.639,95%CI 0.523-0.752), diabetic duration(AUC=0.663,95%CI 0.555-0.772), HbA1c(AUC=0.740,95%CI 0.638-0.839), TG(AUC=0.661,95%CI 0.547-0.776), TC(AUC=0.675,95%CI 0.563-0.788)and LDL-C(AUC=0.644,95%CI 0.532-0.756). Model 1 was established with subclinical DCM as dependent variable, age, diabetic duration, TG, TC, LDL-C and HbA1c as independent variables. Model 2 was established by adding FNDC5 as independent variable on the basis of model 1. Diagnostic efficacy for subclinical DCM was compared between the two models by ROC analysis. The diagnostic efficiency was better with model 2 (AUC=0.980) than with model 1 (AUC=0.879, P<0.001). When sensitivity was set at 0.617, the specificity of model 2 was higher than that of model 1(0.979 vs. 0.936). When sensitivity was set at 0.532, the sensitivity of model 2 was higher than that of model 1 (1.000 vs. 0.915). Conclusions: Our findings suggest that serum FNDC5 could be used as a novel biomarker for the diagnosis of subclinical DCM.
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Affiliation(s)
- Z H Qin
- Department of Endocrinology, Third Affiliated Hospital of Soochow University, Suzhou 213000, China
| | - X L Huang
- Department of Endocrinology, Third Affiliated Hospital of Soochow University, Suzhou 213000, China
| | - L C Tao
- Department of Cardiology, Third Affiliated Hospital of Soochow University, Suzhou 213000, China
| | - F Hua
- Department of Endocrinology, Third Affiliated Hospital of Soochow University, Suzhou 213000, China
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Duan DM, Zhang L, Hua F. LncRNA UCA1 inhibits proliferation and promotes apoptosis of cervical cancer cells by regulating β-catenin/TCF-4. Eur Rev Med Pharmacol Sci 2021; 24:5963-5969. [PMID: 32572909 DOI: 10.26355/eurrev_202006_21489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of this study was to explore the regulatory effect of long non-coding ribonucleic acid (lncRNA) urothelial carcinoma antigen 1 (UCA1) on the proliferation and apoptosis of HeLa cells and to elucidate its potential regulatory mechanism. MATERIALS AND METHODS HeLa cells were cultured in vitro and randomly divided into three groups, including blank control group (Control group), lncRNA UCA1 negative control (NC) group, and lncRNA UCA1 interference group [lncRNA UCA1 small interfering RNA (siRNA) group]. The expression level of lncRNA UCA1 in HeLa cells was detected by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Methyl thiazolyl tetrazolium (MTT) assay was performed to determine the effect of lncRNA UCA1 on the proliferation of HeLa cells. The effect of lncRNA UCA1 on the apoptosis of HeLa cells was determined via Hoechst 33258 staining assay and flow cytometry. In addition, qRT-PCR and Western blotting were employed to measure the messenger RNA (mRNA) and protein expression levels of β-catenin and TCF-4 in HeLa cells, respectively. RESULTS There were no statistically significant differences in the proliferation and apoptosis of HeLa cells as well as the mRNA and protein levels of β-catenin and TCF-4 in HeLa cells between Control group and lncRNA UCA1 NC group (p>0.05). In comparison with lncRNA UCA1 NC group, lncRNA UCA1 siRNA group exhibited overtly reduced proliferation, enhanced apoptosis rate of HeLa cells and down-regulated mRNA and protein levels of β-catenin and TCF-4 in HeLa cells (p<0.05). CONCLUSIONS LncRNA UCA1 inhibits proliferation and promotes the apoptosis of HeLa cells. Furthermore, its mechanism of action may be related to the inhibition on the β-catenin/TCF-4 signaling pathway.
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Affiliation(s)
- D-M Duan
- Department of Gynecology and Obstetrics, Shandong Shanxian Central Hospital, Heze, China.
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Wei CJ, Hua F, Chen YH, Zhang ZW, Shen ZY. Muscone alleviates myocardial ischemia-reperfusion injury via inhibition of oxidative stress and enhancement of SIRT3. J BIOL REG HOMEOS AG 2021; 35:85-96. [PMID: 33480219 DOI: 10.23812/20-101-a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study aimed at probing into the function of muscone in ameliorating myocardial ischemiareperfusion (I/R) injury and exploring the underlying mechanism. To analyze the function of muscone, H9c2 cardiomyocytes were treated with hypoxia/reoxygenation (H/R) and Sprague-Dawley (SD) rats were treated with left anterior descending (LAD) of the coronary artery ligation for 30 min and reperfusion for 2 h to induce myocardial I/R injury. Quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot were used to detect the expression of SIRT3. MTT assay and TUNEL assay were performed to investigate H9c2 viability and apoptosis, respectively. ELISA was employed to determine the expressions of inflammatory cytokines TNF-α, IL-6 and IL-1β, and myocardial injury markers CK and LDH. Oxidative stress markers MDA and SOD, and ROS expression levels were also detected. SIRT3 inhibitor 3-TYP was used to further confirm whether muscone worked via the augmentation of SIRT3. Herein, we found that muscone significantly inhibited inflammation and oxidative stress in H9c2 cardiomyocytes in a dose-dependent manner. H9c2 viability was promoted by muscone while apoptosis was inhibited. In SD rats, pre-treatment of muscone alleviated I/R injury-induced cardiac function dysregulation and left ventricle remolding. Furthermore, muscone increased SIRT3 expression at both mRNA and protein levels. With 3-TYP inhibiting SIRT3, the protective effects of muscone in H9c2 cardiomyocytes and SD rats were all significantly alleviated. In summary, muscone can attenuate inflammation, oxidative stress and cardiomyocytes injury in H9c2 cells treated with H/R and alleviate myocardial I/R injury of SD rats, which are dependent on SIRT3.
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Affiliation(s)
- C J Wei
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Wansheng Street, Suzhou Industrial District, Suzhou, China
| | - F Hua
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Wansheng Street, Suzhou Industrial District, Suzhou, China
| | - Y H Chen
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Wansheng Street, Suzhou Industrial District, Suzhou, China
| | - Z W Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Z Y Shen
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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Abstract
The objectives of this study were to assess the reporting quality and methodological quality of split-mouth trials (SMTs) published during the past 2 decades and to determine whether there has been an improvement in their quality over time. We searched the MEDLINE database via PubMed to identify SMTs published in 1998, 2008, and 2018. For each included SMT, we used the CONsolidated Standards Of Reporting Trials (CONSORT) 2010 guideline, CONSORT for within-person trial (WPT) extension, and a new 3-item checklist to assess its trial reporting quality (TRQ), WPT-specific reporting quality (WRQ), and SMT-specific methodological quality (SMQ), respectively. Multivariable generalized linear models were performed to analyze the quality of SMTs over time, adjusting for potential confounding factors. A total of 119 SMTs were included. The mean overall score for the TRQ (score range, 0 to 32), WRQ (0 to 15), and SMQ (0 to 3) was 15.77 (SD 4.51), 6.06 (2.06), and 1.12 (0.70), respectively. The primary outcome was clearly defined in only 28 SMTs (23.5%), and only 27 (22.7%) presented a replicable sample size calculation. Only 45 SMTs (37.8%) provided the rationale for using a split-mouth design. The correlation between body sites was reported in only 5 studies (4.2%) for sample size calculation and 4 studies (3.4%) for statistical results. Only 2 studies (1.7%) performed an appropriate sample size calculation, and 46 (38.7%) chose appropriate statistical methods, both accounting for the correlation among treatment groups and the clustering/multiplicity of measurements within an individual. Results of regression analyses suggested that the TRQ of SMTs improved significantly with time ( P < 0.001), while there was no evidence of improvement in WRQ or SMQ. Both the reporting quality and methodological quality of SMTs still have much room for improvement. Concerted efforts are needed to improve the execution and reporting of SMTs.
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Affiliation(s)
- D. Qin
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - F. Hua
- Center for Evidence-Based Stomatology, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - H. He
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - S. Liang
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - H. Worthington
- Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - T. Walsh
- Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
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Fang X, Hua F, Riley P, Chen F, Zhang L, Walsh T, Chen Z. Abstracts of published randomised controlled trials in Endodontics: Reporting quality and spin. Int Endod J 2020; 53:1050-1061. [PMID: 32333794 DOI: 10.1111/iej.13310] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 04/21/2020] [Indexed: 01/10/2023]
Abstract
AIMS To assess the reporting quality of recently published randomised controlled trial (RCT) abstracts in Endodontics, to investigate factors associated with reporting quality, and to evaluate the existence and characteristics of spin. Spin refers to reporting strategies that distort study results and misguide readers. METHODOLOGY The PubMed database was searched to identify abstracts of RCTs in the field of Endodontics published during 2017 to 2018. Two authors assessed the reporting quality of each included abstract using the original 16-item CONSORT for Abstracts checklist, with the overall quality score (OQS, range: 0 to 16) being the primary outcome measure. For each individual item, a score of '1' was given if it was described adequately, and '0' if the description was inadequate. Linear regression analyses were conducted to identify factors associated with reporting quality. For the evaluation of spin, two authors selected parallel-group RCTs with a nonsignificant primary outcome from the included abstracts, and evaluated independently the existence and characteristics of spin among these abstracts. RESULTS A total of 162 abstracts were included for assessment of reporting, for which the mean OQS was 3.97 (SD, 1.30; 95 % CI, 3.77 to 4.17). According to multivariable analysis, origin from Europe (P=0.001) and reporting of the exact P value (P=0.020) were significantly associated with better reporting. Forty abstracts with statistically nonsignificant results for their primary outcome were included for spin evaluation, among which 34 (85.0%) had at least one type of spin. Thirty-two abstracts (94.1%) had spin in their conclusions section, and six abstracts (17.6%) had spin in the results section. CONCLUSIONS The reporting quality of RCT abstracts in Endodontics needs to be improved. The occurrence rate of spin in the sample of abstracts of RCTs in the field of Endodontics was high. Relevant stakeholders are recommended to be familiar with the CONSORT for Abstracts guideline and develop active strategies to ensure its implementation.
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Affiliation(s)
- X Fang
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Cariology and Endodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - F Hua
- Centre for Evidence-Based Stomatology, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - P Riley
- Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - F Chen
- Department of Cariology and Endodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - L Zhang
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Cariology and Endodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - T Walsh
- Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Z Chen
- Hubei-MOST KLOS & KLOBM, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- Department of Cariology and Endodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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Meng L, Hua F, Bian Z. Response to the Letter to the Editor: How to Deal with Suspended Oral Treatment during the COVID-19 Epidemic. J Dent Res 2020; 99:988. [PMID: 32282256 DOI: 10.1177/0022034520920166] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- L Meng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - F Hua
- Center for Evidence-Based Stomatology, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Z Bian
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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Abstract
The epidemic of coronavirus disease 2019 (COVID-19), originating in Wuhan, China, has become a major public health challenge for not only China but also countries around the world. The World Health Organization announced that the outbreaks of the novel coronavirus have constituted a public health emergency of international concern. As of February 26, 2020, COVID-19 has been recognized in 34 countries, with a total of 80,239 laboratory-confirmed cases and 2,700 deaths. Infection control measures are necessary to prevent the virus from further spreading and to help control the epidemic situation. Due to the characteristics of dental settings, the risk of cross infection can be high between patients and dental practitioners. For dental practices and hospitals in areas that are (potentially) affected with COVID-19, strict and effective infection control protocols are urgently needed. This article, based on our experience and relevant guidelines and research, introduces essential knowledge about COVID-19 and nosocomial infection in dental settings and provides recommended management protocols for dental practitioners and students in (potentially) affected areas.
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Affiliation(s)
- L Meng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - F Hua
- Center for Evidence-Based Stomatology, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Z Bian
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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22
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Huang JZ, Ren Y, Jiang Y, Shen SY, Ding J, Hua F. GluR1 protects hypoxic ischemic brain damage via activating Akt signaling pathway in neonatal rats. Eur Rev Med Pharmacol Sci 2019; 22:8857-8865. [PMID: 30575928 DOI: 10.26355/eurrev_201812_16654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To investigate the role of glutamic acid receptor 1 (GluR1) in hypoxic-ischemic brain damage (HIBD) in neonatal rats and its underlying mechanism. MATERIALS AND METHODS 7-day-old neonatal rats received right common carotid artery (CCA) ligation for the establishment of HIBD. After the operation, rats were sacrificed at different time points (0, 4, 6, 12, 24, 48, and 72 h), respectively. Meanwhile, rats in Sham group underwent similar procedures without ligation. Lentivirus-GLUR1-shRNA (LV-GLUR1 shRNA group) was constructed and then transfected into the right lateral ventricles of rats to inhibit GluR1 in vivo. Rats received LV-control injection were selected in the control group (LV-control group). After injection of Lentivirus-GLUR1-shRNA, CCA ligation was performed in rats for HIBD construction. Western blot was performed to detect the protein levels of GLUR1, Akt, p-Akt, and vascular endothelial growth factor (VEGF) in brain tissues. Cell apoptosis was measured by TUNEL staining assay. RESULTS After hypoxic ischemia (HI), GLUR1 expression increased gradually and reached a peak at 24 h. Meanwhile, p-Akt expression increased immediately and then gradually decreased. 24 h later, p-Akt expression increased again and peaked at 48 h. VEGF expression increased at 4 h after HI and reached a peak at 12 h. The expression levels of GLUR1, p-Akt, and VEGF in the brain tissues derived from rats transfected with LV-GLUR1 shRNA significantly decreased at both 4 h and 24 h after HI. In addition, results indicated that cell apoptosis was enhanced after LV-GLUR1 shRNA administration, suggesting the role of GLUR1 in protecting against HIBD. CONCLUSIONS GLUR1 exhibits a remarkable protective role in HIBD, which may be related to the activation of the Akt signaling pathway and the upregulation of VEGF after HI.
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Affiliation(s)
- J-Z Huang
- Department of Neurology, Department of Endocrinology; the Third Affiliated Hospital of Soochow University, Changzhou, China.
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Gruppo RA, Malan D, Kapocsi J, Nemes L, Hay CRM, Boggio L, Chowdary P, Tagariello G, von Drygalski A, Hua F, Scaramozza M, Arkin S. Phase 1, single-dose escalating study of marzeptacog alfa (activated), a recombinant factor VIIa variant, in patients with severe hemophilia. J Thromb Haemost 2018; 16:1984-1993. [PMID: 30151972 DOI: 10.1111/jth.14247] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Indexed: 11/29/2022]
Abstract
Essentials Marzeptacog alfa (activated) [MarzAA] is a novel variant of activated human factor VII. A phase 1 dose escalation trial of MarzAA was conducted in subjects with severe hemophilia. MarzAA was safe and tolerated at intravenous doses up to 30 μg kg-1 Data observed support further trials for hemophilia patients with inhibitors to factors VIII/IX. SUMMARY Background Marzeptacog alfa (activated) (MarzAA), a new recombinant activated human factor VII (rFVIIa) variant with four amino acid substitutions, was developed to provide increased procoagulant activity and a longer duration of action in people with hemophilia. Objectives To investigate the safety, tolerability, immunogenicity, pharmacokinetics (PK) and pharmacodynamics (PD) of single ascending intravenous bolus doses of MarzAA in non-bleeding patients with congenital hemophilia A or B with or without inhibitors. Methods This international, phase 1, open-label study (NCT01439971) enrolled males aged 18-64 years with severe hemophilia A or B, with or without FVIII or FIX inhibitors. Subjects were assigned to single-dose MarzAA cohorts (0.5, 4.5, 9, 18 or 30 μg kg-1 ). Blood sampling was performed predose and postdose, and subjects were monitored for 60 days postdose. Safety endpoints included adverse events, vital sign changes, electrocardiograms, laboratory abnormalities, and immunogenicity; secondary endpoints included evaluation of PK and PD. Results Overall, in 25 patients, MarzAA was well tolerated at all dose levels tested, and was not associated with dose-limiting toxicity. No treatment-emergent severe or serious adverse events occurred. MarzAA showed linear dose-response PK across the 4.5-30 μg kg-1 dose range, with a terminal half-life of ⁓ 3.5 h. Dose-dependent shortening of the activated partial thromboplastin time and prothrombin time, and evidence of an increase in peak thrombin as determined with a thrombin generation assay, were observed at all doses. Conclusions MarzAA was tolerated at doses up to 30 μg kg-1 . The safety profile and pharmacological effects observed support further clinical trials for the treatment of hemophilic patients with inhibitors.
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Affiliation(s)
- R A Gruppo
- Comprehensive Hemophilia and Thrombosis Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - D Malan
- Phoenix Pharma Pty Ltd, Mount Croix, Port Elizabeth, South Africa
| | - J Kapocsi
- Semmelweis University 1st Department of Medicine, Budapest, Hungary
| | - L Nemes
- National Hemophilia Center and Hemostasis Department, Medical Center of the Hungarian Defense Forces, Budapest, Hungary
| | - C R M Hay
- University Department of Haematology, Manchester Royal Infirmary, Manchester, UK
| | - L Boggio
- Hemophilia and Thrombophilia Center, Rush University Medical Center, Chicago, IL, USA
| | - P Chowdary
- KD Haemophilia and Thrombosis Centre, Royal Free Hospital, London, UK
| | - G Tagariello
- Department of Medicine, Hemophilia Center, Castelfranco Veneto Hospital, Castelfranco, Italy
| | | | - F Hua
- Applied BioMath, Concord, MA, USA
| | - M Scaramozza
- Early Clinical Development, Pfizer Worldwide R&D, Pfizer Inc., Cambridge, MA, USA
| | - S Arkin
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA, USA
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Abstract
Background Recent years have seen numerous efforts and resources devoted to the development of open access (OA), but the current OA situation of the oncology literature remains unknown. We conducted this cross-sectional study to determine the current share and provision methods of OA in the field of oncology, identify predictors of OA status (OA versus non-OA), and study the association between OA and citation counts. Materials and methods PubMed was searched for oncology-related, peer-reviewed journal articles published in December 2014. Google, Google Scholar, PubMed, ResearchGate, OpenDOAR and OAIster were manually checked to assess the OA status of each included article. Citation data were extracted from Web of Science, Scopus and Google Scholar. Descriptive statistics were used to summarize the OA proportion (primary outcome) and OA provision methods. Multivariable logistic regression and multilevel generalized linear model analyses were performed to study predictors of OA status and the association between OA and citation counts, respectively. Results In a random sample of 1000 articles, 912 were deemed eligible and therefore included. Of these, the full-texts of 530 articles (58.1%; 95% CI: 54.9-61.3) were freely available online: 314 (34.4%) were available from publishers ('Gold road' to OA), 424 (46.5%) were available via self-archiving ('Green road' to OA). According to multivariable regression analyses, impact factor, publisher type, language, research type, number of authors, continent of origin, and country income were significant predictors of articles' OA status; OA articles received a citation rate 1.24 times the incidence rate for non-OA articles (95% CI: 1.05-1.47; P = 0.012). Conclusions Based on our sample, in the field of oncology, 42% of recent journal articles are behind the pay-wall (non-OA) 1 year after publication; the 'Green road' of providing OA is more common than the 'Gold road'; OA is associated with higher citation counts.
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Affiliation(s)
- F Hua
- Cochrane Oral Health, Divisions of Dentistry
| | - H Sun
- Molecular and Clinical Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - T Walsh
- Cochrane Oral Health, Divisions of Dentistry
| | - A-M Glenny
- Cochrane Oral Health, Divisions of Dentistry
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Parsons-Rich D, Hua F, Li G, Kantaridis C, Pittman DD, Arkin S. Phase 1 dose-escalating study to evaluate the safety, pharmacokinetics, and pharmacodynamics of a recombinant factor Xa variant (FXa I16L ). J Thromb Haemost 2017; 15:931-937. [PMID: 28294526 DOI: 10.1111/jth.13673] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Indexed: 11/28/2022]
Abstract
Essentials FXaI16L is a recombinant zymogen-like variant of activated coagulation factor X (FXa). A phase 1 dose escalation clinical trial of FXaI16L was conducted in healthy adults. FXaI16L was safe and tolerated at doses up to 5 μg/kg; no dose-limiting toxicity was observed. Data support further development of FXaI16L for patients with acute hemorrhagic conditions. SUMMARY Background FXaI16L (PF-05230907) is a zymogen-like variant of activated factor X (FXa). It shows enhanced resistance to inactivation by endogenous inhibitors as compared with wild-type FXa, and restores hemostatic activity in non-clinical models of various bleeding conditions. Objectives To evaluate the safety, pharmacokinetics and pharmacodynamics of FXaI16L by performing a phase 1, first-in-human, dose-escalation clinical trial in healthy adult volunteers. Methods Participants were assigned to one of six ascending single-dose cohorts (0.1, 0.3, 1, 2, 3 or 5 μg kg-1 ), each planned to comprise six volunteers treated with FXaI16L and two treated with placebo. Assessments included safety monitoring, pharmacokinetic and pharmacodynamic (PD) analyses, and immunogenicity testing. Results The trial enrolled 49 male volunteers. Administration of a single intravenous bolus dose of FXaI16L was safe and tolerated at all dose levels tested, with no dose-limiting toxicity or serious adverse events. FXaI16L plasma levels appeared to increase dose-proportionally, with a half-life of ~ 4 min. Treatment-related PD changes were observed for activated partial thromboplastin time, thrombin generation assay, thrombin-antithrombin complexes, prothrombin fragment 1 + 2, and D-dimer. One volunteer had a weak and transient non-neutralizing antidrug antibody response, which did not cross-react with native FX or native FXa. Conclusions FXaI16L was safe and tolerated, and showed a pharmacologic effect in healthy adults when administered at doses up to 5 μg kg-1 . The safety profile, pharmacokinetics and pharmacodynamics observed in this clinical trial support the further development of FXaI16L for hemostatic treatment in individuals with acute hemorrhagic conditions.
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Affiliation(s)
- D Parsons-Rich
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
| | - F Hua
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
| | - G Li
- PharmaTherapeutics Clinical Research, Pfizer Inc., Collegeville, PA, USA
| | - C Kantaridis
- Pfizer Clinical Research Unit, Pfizer Inc., Brussels, Belgium
| | - D D Pittman
- Rare Disease Research, Pfizer Inc., Cambridge, MA, USA
| | - S Arkin
- Rare Disease Research, Pfizer Inc., Cambridge, MA, USA
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Lee D, Nayak S, Martin SW, Heatherington AC, Vicini P, Hua F. A quantitative systems pharmacology model of blood coagulation network describes in vivo biomarker changes in non-bleeding subjects. J Thromb Haemost 2016; 14:2430-2445. [PMID: 27666750 DOI: 10.1111/jth.13515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 09/01/2016] [Indexed: 01/03/2023]
Abstract
Essentials Baseline coagulation activity can be detected in non-bleeding state by in vivo biomarker levels. A detailed mathematical model of coagulation was developed to describe the non-bleeding state. Optimized model described in vivo biomarkers with recombinant activated factor VII treatment. Sensitivity analysis predicted prothrombin fragment 1 + 2 and D-dimer are regulated differently. SUMMARY Background Prothrombin fragment 1 + 2 (F1 + 2 ), thrombin-antithrombin III complex (TAT) and D-dimer can be detected in plasma from non-bleeding hemostatically normal subjects or hemophilic patients. They are often used as safety or pharmacodynamic biomarkers for hemostatis-modulating therapies in the clinic, and provide insights into in vivo coagulation activity. Objectives To develop a quantitative systems pharmacology (QSP) model of the blood coagulation network to describe in vivo biomarkers, including F1 + 2 , TAT, and D-dimer, under non-bleeding conditions. Methods The QSP model included intrinsic and extrinsic coagulation pathways, platelet activation state-dependent kinetics, and a two-compartment pharmacokinetics model for recombinant activated factor VII (rFVIIa). Literature data on F1 + 2 and D-dimer at baseline and changes with rFVIIa treatment were used for parameter optimization. Multiparametric sensitivity analysis (MPSA) was used to understand key proteins that regulate F1 + 2 , TAT and D-dimer levels. Results The model was able to describe tissue factor (TF)-dependent baseline levels of F1 + 2 , TAT and D-dimer in a non-bleeding state, and their increases in hemostatically normal subjects and hemophilic patients treated with different doses of rFVIIa. The amount of TF required is predicted to be very low in a non-bleeding state. The model also predicts that these biomarker levels will be similar in hemostatically normal subjects and hemophilic patients. MPSA revealed that F1 + 2 and TAT levels are highly correlated, and that D-dimer is more sensitive to the perturbation of coagulation protein concentrations. Conclusions A QSP model for non-bleeding baseline coagulation activity was established with data from clinically relevant in vivo biomarkers at baseline and changes in response to rFVIIa treatment. This model will provide future mechanistic insights into this system.
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Affiliation(s)
- D Lee
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
| | - S Nayak
- Pharmacometrics, Global Innovative Pharma Business, Pfizer Inc., Cambridge, MA, USA
| | - S W Martin
- Pharmacometrics, Global Innovative Pharma Business, Pfizer Inc., Cambridge, MA, USA
| | - A C Heatherington
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
| | - P Vicini
- Pharmacokinetics, Dynamics and Metabolism - New Biological Entities, Pfizer Inc., San Diego, CA, USA
| | - F Hua
- PharmaTherapeutics Clinical Research, Pfizer Inc., Cambridge, MA, USA
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Hua F, Wang L, Rong X, Hu Y, Zhang JM, He W, Zhang FC. Elevation of Vδ1 T cells in peripheral blood and livers of patients with primary biliary cholangitis. Clin Exp Immunol 2016; 186:347-355. [PMID: 27543908 DOI: 10.1111/cei.12852] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/25/2016] [Accepted: 08/16/2016] [Indexed: 12/26/2022] Open
Abstract
Primary biliary cholangitis (PBC), hitherto called primary biliary cirrhosis, is a cholestatic liver disease of unclear aetiology with autoimmune features. Accumulating evidence revealed that γδ T cells were involved in the development of autoimmune diseases. As one of γδ T cells subsets, however, the role of Vδ1 T cells in the immunopathogenesis of PBC is poorly understood. We analysed peripheral blood Vδ1 T cells in PBC patients in active stage (ASP, n = 18), adequate responders (AR, n = 10) and inadequate responders (IAR, n = 4) to ursodeoxycholic acid (UDCA) and an age-matched healthy control group (n = 16) by flow cytometric analysis. The ASP group exhibited a significantly higher proportion and absolute number of Vδ1 T cells, which were also observed in immunofluorescence staining of liver biopsy specimens of PBC patients. Moreover, these Vδ1 T cells expressed a series of activation markers and intracellular cytokines, which may contribute to the immunopathogenesis of PBC. Our study will help to clarify the role of Vδ1 T cells in the development of PBC.
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Affiliation(s)
- F Hua
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education
| | - L Wang
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education
| | - X Rong
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education
| | - Y Hu
- Department of Immunology, School of Basic Medicine, Peking Union Medical College and Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, National Key Laboratory of Medical Molecular Biology, Beijing, China
| | - J M Zhang
- Department of Immunology, School of Basic Medicine, Peking Union Medical College and Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, National Key Laboratory of Medical Molecular Biology, Beijing, China
| | - W He
- Department of Immunology, School of Basic Medicine, Peking Union Medical College and Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, National Key Laboratory of Medical Molecular Biology, Beijing, China
| | - F C Zhang
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education
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Abstract
The objectives of this study were 1) to find out if and how authors and peer reviewers for dental journals are encouraged to use reporting guidelines (RGs); 2) to identify factors related to RG endorsement; and 3) to assess the knowledge, opinions, and future plans of dental journal editors in chief (EICs) on RGs. A total of 109 peer-reviewed and original research-oriented dental journals that were indexed in the MEDLINE and/or SCIE database in 2015 were included. The "instructions to authors" and "instructions to reviewers" of these journals were identified and retrieved from journals' official websites. Any mention of RGs or other related policies were sought and extracted. In addition, an anonymous survey of the EICs of the included journals was conducted with a validated questionnaire. All 109 journals provided "instructions to authors," among which 55 (50.5%) mentioned RGs. Only the CONSORT (45.0%), PRISMA (13.8%), and STROBE (12.8%) guidelines were mentioned by >10% of the included journals. Statistical analyses suggest that RGs were more frequently mentioned by SCIE-indexed journals (P < 0.001), higher-impact journals (P = 0.002), and journals that endorsed the ICMJE recommendations (P < 0.001). "Instructions to reviewers" were available online for only 9 journals (8.3%), 3 of which mentioned RGs. For the EIC survey, the response rate was 32.1% (35 of 109). Twenty-six editors (74.3%) stated that they knew what RGs were before receiving our questionnaire. Twenty-four editors (68.6%) believed that RGs should be adopted by all refereed dental journals where appropriate. RGs are important tools for enhancing research reporting and reducing avoidable research waste, but currently they are not widely endorsed by dental journals. Joint efforts by all stakeholders to further promote RG usage in dentistry are needed.
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Affiliation(s)
- F Hua
- Cochrane Oral Health Group, School of Dentistry, The University of Manchester, Manchester, UK
| | - T Walsh
- Cochrane Oral Health Group, School of Dentistry, The University of Manchester, Manchester, UK
| | - A-M Glenny
- Cochrane Oral Health Group, School of Dentistry, The University of Manchester, Manchester, UK
| | - H Worthington
- Cochrane Oral Health Group, School of Dentistry, The University of Manchester, Manchester, UK
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Hu J, Liu B, Zhao Q, Jin P, Hua F, Zhang Z, Liu Y, Zan K, Cui G, Ye X. Bone marrow stromal cells inhibits HMGB1-mediated inflammation after stroke in type 2 diabetic rats. Neuroscience 2016; 324:11-9. [PMID: 26946264 DOI: 10.1016/j.neuroscience.2016.02.058] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/16/2016] [Accepted: 02/24/2016] [Indexed: 10/22/2022]
Abstract
High-mobility group box 1 (HMGB1), a ligand of receptor for advanced glycation endproducts (RAGE), functions as a proinflammatory factor. It is mainly involved in inflammatory activation and contributes to the initiation and progression of stroke. By using a model of transient middle cerebral artery occlusion (MCAo) in type 2 diabetic rats, we investigated the changes of pro-inflammation mediators, blood-brain barrier (BBB) leakage and functional outcome after stroke. Type 2 diabetic rats did not show an increased lesion volume, but exhibited significantly increased expression of HMGB1 and RAGE, BBB leakage, as well as decreased functional outcome after stroke compared with control rats. Injection of bone marrow stromal cells (BMSCs) into type 2 diabetic rats significantly reduced the expression of HMGB1 and RAGE, attenuated BBB leakage, and improved functional outcome after stroke. BMSCs-treated type 2 diabetic rats inhibited inflammation and improved functional outcome after stroke. Furthermore, in vitro data support the hypothesis that BMSCs-induced reduction of HMGB1 and RAGE in T2DM-MCAo rats contributed to attenuated inflammatory response in the ischemic brain, which may lead to the beneficial effects of BMSCs treatment. Further investigation of BMSCs treatment in type 2 diabetic stroke is warranted.
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Affiliation(s)
- J Hu
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
| | - B Liu
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China; Department of Geriatric Neurology, Nanjing Brain Hospital, Affiliated to Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Q Zhao
- Department of Neurology, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China
| | - P Jin
- Department of Plastic Surgery, Xuzhou Central Hospital, Xuzhou, Jiangsu Province, China
| | - F Hua
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
| | - Z Zhang
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
| | - Y Liu
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
| | - K Zan
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China
| | - G Cui
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China.
| | - X Ye
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical College, Xuzhou, Jiangsu Province, China.
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Wang XL, Huang HY, Li Z, Yu YS, Hu YQ, Ye WX, Hua F, Chen YH, Ni H, Ding QW, Shen ZY. Risk factors associated with aortic remodeling in patients with Stanford type B aortic dissection after thoracic endovascular aortic repair. Genet Mol Res 2015; 14:11692-9. [PMID: 26436493 DOI: 10.4238/2015.october.2.2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To determine the risk factors associated with adverse aortic remodeling after thoracic endovascular aortic repair (TEVAR) in patients with Stanford type B aortic dissection, we performed a retrospective analysis of 54 patients between January 2009 and June 2012 at the First Affiliated Hospital of Soochow University. All patients underwent TEVAR of the descending thoracic aorta. Multiple-logistic regression analyses were performed to identify risk factors associated with aortic remodeling. True-lumen and false-lumen volumes were increased (P < 0.001) and decreased (P < 0.001) after surgery, respectively. Therefore, the remodeling index increased after surgery (1.04 ± 0.6 to 2.06 ± 1.12, P < 0.001). Remodeling index and true-lumen volume were higher in the favorable aortic remodeling group compared to the adverse aortic remodeling group (P < 0.001), while the false-lumen volume was lower in the favorable aortic remodeling group (P < 0.001). Multivariate analyses revealed a branch originating from the false lumen (OR = 39.9, P < 0.01) and multiple tears (OR = 27.4, P < 0.01) to be independent risk factors for adverse aortic remodeling. Therefore, a branch originating from the false lumen and multiple tears were determined to be independent risk factors for adverse aortic remodeling after TEVAR in patients with Stanford type B aortic dissection.
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Affiliation(s)
- X L Wang
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - H Y Huang
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Z Li
- Department of Interventional Radiology, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Y S Yu
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Y Q Hu
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - W X Ye
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - F Hua
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Y H Chen
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - H Ni
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Q W Ding
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Z Y Shen
- Department of Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
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Zhu B, Hua F, Yang C. Disturbance of autophagic pathway may be involved in the diabetes-induced oxidative response in brain. Hum Exp Toxicol 2015; 35:793. [PMID: 26424771 DOI: 10.1177/0960327115597987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- B Zhu
- Department of Critical Care Medicine, The Third Affiliated Hospital of Soochow University, People's Republic of China
| | - F Hua
- Department of Endocrinology, The Third Affiliated Hospital of Soochow University, People's Republic of China
| | - C Yang
- Department of Anesthesiology, The Third Affiliated Hospital of Soochow University, People's Republic of China
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Nayak S, Lee D, Patel-Hett S, Pittman DD, Martin SW, Heatherington AC, Vicini P, Hua F. Using a Systems Pharmacology Model of the Blood Coagulation Network to Predict the Effects of Various Therapies on Biomarkers. CPT Pharmacometrics Syst Pharmacol 2015; 4:396-405. [PMID: 26312163 PMCID: PMC4544053 DOI: 10.1002/psp4.50] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 04/23/2015] [Indexed: 01/09/2023]
Abstract
A number of therapeutics have been developed or are under development aiming to modulate the coagulation network to treat various diseases. We used a systems model to better understand the effect of modulating various components on blood coagulation. A computational model of the coagulation network was built to match in-house in vitro thrombin generation and activated Partial Thromboplastin Time (aPTT) data with various concentrations of recombinant factor VIIa (FVIIa) or factor Xa added to normal human plasma or factor VIII-deficient plasma. Sensitivity analysis applied to the model revealed that lag time, peak thrombin concentration, area under the curve (AUC) of the thrombin generation profile, and aPTT show different sensitivity to changes in coagulation factors' concentrations and type of plasma used (normal or factor VIII-deficient). We also used the model to explore how variability in concentrations of the proteins in coagulation network can impact the response to FVIIa treatment.
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Affiliation(s)
- S Nayak
- Pharmacometrics, Global Innovative Pharma Business (GIPB), Pfizer Inc. Cambridge, Massachusetts, USA
| | - D Lee
- Quantitative Clinical Sciences, PharmaTherapeutics Clinical R&D, Pfizer Inc. Cambridge, Massachusetts, USA
| | - S Patel-Hett
- Rare Disease Research Unit Pfizer Inc. Cambridge, Massachusetts, USA
| | - D D Pittman
- Rare Disease Research Unit Pfizer Inc. Cambridge, Massachusetts, USA
| | - S W Martin
- Pharmacometrics, Global Innovative Pharma Business (GIPB), Pfizer Inc. Cambridge, Massachusetts, USA
| | - A C Heatherington
- Quantitative Clinical Sciences, PharmaTherapeutics Clinical R&D, Pfizer Inc. Cambridge, Massachusetts, USA
| | - P Vicini
- Pharmacokinetics, Dynamics and Metabolism, New Biological Entities, Pfizer Inc. Cambridge, Massachusetts, USA
| | - F Hua
- Quantitative Clinical Sciences, PharmaTherapeutics Clinical R&D, Pfizer Inc. Cambridge, Massachusetts, USA
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Dolff S, Quandt D, Feldkamp T, Jun C, Mitchell A, Hua F, Specker C, Kribben A, Witzke O, Wilde B. Increased percentages of PD-1 on CD4+ T cells is associated with higher INF-γ production and altered IL-17 production in patients with systemic lupus erythematosus. Scand J Rheumatol 2014; 43:307-13. [PMID: 25088926 DOI: 10.3109/03009742.2013.869830] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Programmed death (PD)-1 is a cell death receptor that, upon stimulation, leads to apoptosis. Previous studies have shown alteration of PD-1 expression on T cells and PD-1 genes in patients with systemic lupus erythematosus (SLE). The aim of this study was to assess the expression of this receptor on effector T cells in patients with SLE. METHOD In this study we enrolled 32 SLE patients and 31 healthy controls. T cells from peripheral blood were analysed by flow cytometry for the expression of PD-1. Interferon (IFN)-γ and interleukin (IL)-17-producing cells were investigated for the expression of this co-stimulatory marker. RESULTS Percentages of CD4(+) T cells expressing PD-1 were significantly increased in patients with SLE compared to healthy controls. The percentage of PD-1 expression was correlated with the production of INF-γ (r = 0.83, p < 0.0001). We also investigated the production of IL-17 by PD-1(+) CD3(+) T cells. Inactive patients (3.2 ± 1.2% vs. 5.9 ± 3.5%, p = 0.002) and patients without lupus nephritis (LN) (3.2 ± 1.5% vs. 5.9 ± 3.5%, p = 0.005) showed lower levels of IL-17 compared to healthy controls. CONCLUSION We have demonstrated increased expression of PD-1 on CD4(+) T cells in SLE patients and an association between PD-1 expression on CD4(+) T cells and IFN-γ expression on CD3(+) T cells. We have also shown that there is an altered subset of PD-1(+) T cells in inactive patients and patients without LN producing lower amounts of IL-17.
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Affiliation(s)
- S Dolff
- Department of Nephrology, University Hospital Essen, University Duisburg-Essen , Essen , Germany
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Su RN, Guo YD, Xie D, Peng YL, Cai JF, Hua F, Sheng LH. Identification of forensically important beetles (Coleoptera: Histeridae) in China based on 16S rRNA and Cyt b. Trop Biomed 2013; 30:375-387. [PMID: 24189669] [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: 06/02/2023]
Abstract
Exact identification of an insect sample is usually the first essential step in a forensic entomological analysis. However, the morphological similarity of beetles in the level of species usually poses a challenge for forensic scientists within their routine work. As a supplementary to traditional morphological method, molecular genetics identification turns out to be simple and time-saving. A molecular identification method involving a 288-bp segment of the 16S ribosomal RNA (16S rRNA) gene and a 334-bp segment of the cytochrome b (Cyt b) gene from 23 histerid beetles specimens, collected from 7 locations in 6 Chinese provinces, was evaluated. The 16S rRNA and Cyt b genes are sequenced to examine the ability of the region, resolve species identities and enrich the local databases. The monophyletic branches of the phylogenetic tree showed the potential of the markers in identifying beetles within families. Combined analysis is a more accurate approach for species identication than independent analysis.
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Affiliation(s)
- R N Su
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, Hunan, China
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Ishrat T, Sayeed I, Atif F, Hua F, Stein DG. Progesterone is neuroprotective against ischemic brain injury through its effects on the phosphoinositide 3-kinase/protein kinase B signaling pathway. Neuroscience 2012; 210:442-50. [PMID: 22450229 DOI: 10.1016/j.neuroscience.2012.03.008] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 02/20/2012] [Accepted: 03/07/2012] [Indexed: 12/18/2022]
Abstract
We tested the hypothesis that the phosphoinositide 3-kinase/protein kinase B (PI3K/Akt) pathway mediates some of the neuroprotective effects of progesterone (PROG) after ischemic stroke. We examined whether PROG acting through the PI3K/Akt pathway could affect the expression of vascular endothelial growth factor (VEGF) and brain-derived neurotrophic factor (BDNF). Rats underwent permanent focal cerebral ischemia by electrocoagulation and received intraperitoneal injections of PROG (8 mg/kg) or vehicle at 1 h post-occlusion and subcutaneous injections at 6, 24, and 48 h. PAkt/Akt levels, apoptosis and apoptosis-related proteins (phosphorylated Bcl-2-associated death promoter (pBAD), BAD, caspase-3, and cleaved caspase-3) were analyzed by TUNEL assays, Western blotting and immunohistochemistry at 24 h post-pMCAO. VEGF and BDNF were analyzed at 24, 72 h and 14 days post-pMCAO with Western blots. Following pMCAO, PROG treatment significantly (P<0.05) reduced ischemic lesion size and edema. Treatment with PROG significantly (P<0.05) decreased VEGF at 24 and 72 h but increased VEGF expression 14 days after injury. The treatment also increased BDNF, and attenuated apoptosis by increasing Akt phosphorylation compared with vehicle alone. The selective PI3K inhibitor wortmannin compromised PROG-induced neuroprotective effects and reduced the elevation of pAkt levels in the ischemic penumbra. Our findings lead us to suggest that the PI3K/Akt pathway can play a role in mediating the neuroprotective effects of PROG after stroke by altering the expression of trophic factors in the brain.
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Affiliation(s)
- T Ishrat
- Department of Emergency Medicine, Emory University School of Medicine, 1365 B Clifton Road, Suite 5100, Atlanta, GA 30322, USA
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Hongde H, Minxin Y, Shiyang Y, Hua F. Nutritional support for chronic heart failure. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Petralia R, Wang Y, Hua F, Yi Z, Zhou A, Ge L, Stephenson F, Wenthold R. Corrigendum to “organization of NMDA receptors at extrasynaptic locations”. Neuroscience 2011. [DOI: 10.1016/j.neuroscience.2010.12.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zheng J, Koh X, Hua F, Li G, Larrick JW, Bian JS. Cardioprotection induced by Na+/K+-ATPase activation involves extracellular signal-regulated kinase 1/2 and phosphoinositide 3-kinase/Akt pathway. Cardiovasc Res 2010; 89:51-9. [DOI: 10.1093/cvr/cvq263] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Petralia RS, Wang YX, Hua F, Yi Z, Zhou A, Ge L, Stephenson FA, Wenthold RJ. Organization of NMDA receptors at extrasynaptic locations. Neuroscience 2010; 167:68-87. [PMID: 20096331 DOI: 10.1016/j.neuroscience.2010.01.022] [Citation(s) in RCA: 159] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 12/14/2009] [Accepted: 01/13/2010] [Indexed: 12/14/2022]
Abstract
NMDA receptors are found in neurons both at synapses and in extrasynaptic locations. Extrasynaptic locations are poorly characterized. Here we used preembedding immunoperoxidase and postembedding immunogold electron microscopy and fluorescence light microscopy to characterize extrasynaptic NMDA receptor locations in dissociated hippocampal neurons in vitro and in the adult and postnatal hippocampus in vivo. We found that extrasynaptic NMDA receptors on neurons in vivo and in vitro were usually concentrated at points of contact with adjacent processes, which were mainly axons, axon terminals, or glia. Many of these contacts were shown to contain adhesion factors such as cadherin and catenin. We also found associations of extrasynaptic NMDA receptors with the membrane associated guanylate kinase (MAGUKs), postsynaptic density (PSD)-95 and SAP102. Developmental differences were also observed. At postnatal day 2 in vivo, extrasynaptic NMDA receptors could often be found at sites with distinct densities whereas dense material was seen only rarely at sites of extrasynaptic NMDA receptors in the adult hippocampus in vivo. This difference probably indicates that many sites of extrasynaptic NMDA receptors in early postnatal ages represent synapse formation or possibly sites for synapse elimination. At all ages, as suggested in both in vivo and in vitro studies, extrasynaptic NMDA receptors on dendrites or the sides of spines may form complexes with other proteins, in many cases, at stable associations with adjacent cell processes. These associations may facilitate unique functions for extrasynaptic NMDA receptors.
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Affiliation(s)
- R S Petralia
- Laboratory of Neurochemistry, National Institute on Deafness and Other Communication Disorders/National Institutes of Health (NIDCD/NIH), Bethesda, MD, USA.
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Heuer M, Reinhardt R, Kneiseler G, Würzinger P, Zou X, Hua F, Jian F, Paul A, Kaiser G. Liver Transplantation in Swine without Venovenous Bypass. Eur Surg Res 2010; 45:20-5. [DOI: 10.1159/000318001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 06/25/2010] [Indexed: 11/19/2022]
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Gaoyu C, Hua F, Kaizhi L, Yanli G, Yi H. Intraoperative fatal pulmonary embolism during resection of a parasagittal meningioma. Anaesth Intensive Care 2008; 36:753. [PMID: 18853607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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Zhang Q, Shin YJ, Hua F, Saraf LV, Matson DW. Fabrication of transparent capacitive structure by self-assembled thin films. J Nanosci Nanotechnol 2008; 8:3008-3012. [PMID: 18681039 DOI: 10.1166/jnn.2008.075] [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] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An approach to fabricating transparent electronic devices by using nanomaterial and nanofabrication is presented in this paper. A see-through capacitor is constructed from self-assembled silica nanoparticle layers that are stacked on the transparent substrate. The electrodes are made of indium tin oxide. Unlike the traditional processes used to fabricate such devices, the self-assembly approach enables one to synthesize the thin film layers at lower temperature and cost, and with a broader availability of nanomaterials. The vertical dimension of the self-assembled thin films can be precisely controlled, as well as the molecular order in the thin film layers. The shape of the capacitor is generated by planar micropatterning. The monitoring by quartz crystal demonstrates the steady growth of the silica nanoparticle multilayer. In addition, because the material synthesis and the device fabrication steps are separate, the fabrication is not affected by the harsh conditions required for the material synthesis. As a result, a clear pattern is allowed over a large area on the substrate. The prepared capacitive structure has an optical transparency higher than 92% over the visible spectrum. The capacitive impedance is measured at different frequencies and fit the theoretical results. As one of the fundamental components, this type of capacitive structure can serve in the transparent circuits, interactive media and sensors, as well as being applicable to other transparent devices.
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Affiliation(s)
- Q Zhang
- Electrical and Computer Engineering Department, Clarkson University, Potsdam, NY 13699, USA
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Hua F, Cornejo MG, Cardone MH, Stokes CL, Lauffenburger DA. Effects of Bcl-2 levels on Fas signaling-induced caspase-3 activation: molecular genetic tests of computational model predictions. J Immunol 2005. [DOI: 10.4049/jimmunol.175.9.6235-b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Feng J, Hua F, Shuo R, Chongfeng G, Huimian X, Nakajima T, Subao W, Tsuchida N. Upregulation of non-mutated H-ras and its upstream and downstream signaling proteins in colorectal cancer. Oncol Rep 2001; 8:1409-13. [PMID: 11605075 DOI: 10.3892/or.8.6.1409] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We analyzed H-ras protein expression in 38 human colon cancers and the paired normal tissues. H-ras levels were significantly higher in the malignant tumor (average 0.19+/-0.27) than in its normal adjacent tissues (average 0.06+/-0.15) (p<0.05). The H-ras protein expressed in colon carcinomas contained activated form of H-ras without mutation, based on the findings obtained by RBD-binding (ras binding domain of Raf protein) assay and PCR-SSCP analysis. In addition, we found that H-ras expression was higher in female patients than male, and in cancers with distant metastasis compared to those with non-distant metastasis. Good correlation between H-ras expression levels and those of the upstream and downstream signaling proteins of EGFR, MEK and ERK was found, suggesting that H-ras may play a significant role in carcinogenesis of colorectal cancer.
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Affiliation(s)
- J Feng
- Department of Molecular Oncology and Microbiology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113, Japan
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Lee JW, Hua F, Lee DS. Thermoreversible gelation of biodegradable poly(epsilon-caprolactone) and poly(ethylene glycol) multiblock copolymers in aqueous solutions. J Control Release 2001; 73:315-27. [PMID: 11516508 DOI: 10.1016/s0168-3659(01)00297-8] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.7] [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: 10/17/2022]
Abstract
The multiblock copolymers composed of poly(ethylene glycol)s (PEGs) and biodegradable poly(epsilon-caprolactone)s (PCLs) were synthesized through one-step condensation copolymerization with hexamethylene diisocyanate (HDI) as a coupling agent. The typical phase diagram of these multiblock copolymers in aqueous solution displayed a critical gel concentration (CGC) and an upper phase-transition temperature, which were mainly determined by the PEG/PCL block ratio, the PEG or PCL block lengths and the molecular weight. With decreasing PEG/PCL block ratio, the CGC decreased with an elevated sol-gel transition temperature on account of the enhanced hydrophobicity. The HDI/Diols ratio was used to control the molecular weight. At high molecular weights, the CGC decreased, related to the enhanced aggregation of PCL blocks and physical crosslinkage between PCL block domains due to the increased number of PCL blocks in each molecule. For the sample containing the long PCL(2000) block (M(n), 2000), the CGC dropped dramatically due to the high hydrophobicity and the poor compatibility between PCL and PEG. The dynamic phase transition process was observed by combining optical microscopy (OM) and differential scanning calorimetry (DSC) in a certain heating/cooling rate. Finally, a possible phase separation-induced gelation mechanism is suggested.
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Affiliation(s)
- J W Lee
- Center for Advanced Functional Polymers, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon, 440-746, Kyungki, South Korea
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Chen J, Hua F, Qiu J, Yang Y. [Study of "living" radical polymerization by FTIR in situ]. Guang Pu Xue Yu Guang Pu Fen Xi 2001; 21:47-53. [PMID: 12953576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Three types of living radical polymerization processes were monitored by means of FTIR spectrometer with handful diamond detector called as Dicomp in situ. It was found that both styrene and styrene/hydroxylpropyl methyacrylate (HPMA) could polymerize according to stable free radical polymerization (SFRP) mechanism in presence of 4-hydroxyl tetramethypiperidiyl-1-oxy(HTEMPO). For styrene/HPMA system, the styrene and HPMA conversion monitored by FTIR were linear with increase of molecular weight, but it gave longer induction period compared with that for St bulk polymerization. It was related to the hydrogen-transfer reaction between the propagating radicals with the end HPMA unit and HTEMPO. Furthermore, This following method in situ could be introduced into monitoring heterogeneous polymerization of styrene during atom transfer radical polymerization (ATRP). The apparent kinetics was found to be about zero order and not 1.0 order, due to propagating on the complex including radicals, CuX and bpy in heterogeneous interface. The polymerization rate will be not related to the St in bulk St phase.
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Affiliation(s)
- J Chen
- Department of Macromolecular Science, Key Lab of Molecular Engineering for Polymeric Materials, Fudan University, 200433 Shanghai
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Seishima M, Hua F. [Lipoprotein X]. Nihon Rinsho 2001; 59 Suppl 2:91-5. [PMID: 11351709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Affiliation(s)
- M Seishima
- Department of Laboratory Medicine, Gifu University School of Medicine
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Li Y, Hua F, Carraway KL, Carraway CA. The p185(neu)-containing glycoprotein complex of a microfilament-associated signal transduction particle. Purification, reconstitution, and molecular associations with p58(gag) and actin. J Biol Chem 1999; 274:25651-8. [PMID: 10464301 DOI: 10.1074/jbc.274.36.25651] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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: 11/06/2022] Open
Abstract
Microfilaments associate with the microvillar membrane of 13762 ascites mammary adenocarcinoma cells via a large transmembrane complex (TMC) comprising the major glycoproteins TMC-gp120, -110, -80, -65, and -55, the receptor kinase p185(neu), and the cytoplasmic proteins actin and p58(gag), linking the receptor with microfilaments in a signal transduction particle. Immunoblot screening with polyclonal antisera to TMC glycoproteins showed selective epithelial expression in normal rat tissues and epithelially derived tumor cells. The TMC glycoproteins were isolated by solubilization of microfilament core preparations in SDS, dilution, and separation on a concanavalin A-agarose affinity column. The large p185(neu)-containing complex was reconstituted from the column eluate after displacement of SDS with nonionic detergent, demonstrated by gel filtration and co-immunoprecipitation of the glycoproteins with anti-gp55 or anti-p185(neu). Exhaustive biotinylation of the glycoproteins gave a stoichiometry of gp120:gp110:gp80:gp65:gp55 of approximately 1:1:1:0.5:1. Overlay blots with biotinylated actin and in vitro translated, [(35)S]methionine-labeled p58(gag), respectively, showed specific interactions of actin with gp55 and gp120 and of p58(gag) with gp65 and gp55. These results provide evidence for a specific complex of microfilament-associated glycoproteins containing p185(neu) and p58(gag) and suggest a role for the complex in signal transduction scaffolding.
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Affiliation(s)
- Y Li
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, Miami, Florida 33101, USA
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