1
|
Guan WC, Chai RN, Xu C, Wang XZ, Huang HH, Zhao YM, Zou HM. [Analysis on the management of type 2 inflammatory asthma from the guideline of Global Strategy for Asthma Management and Prevention]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:1964-1971. [PMID: 38186143 DOI: 10.3760/cma.j.cn112150-20230726-00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Bronchial asthma is a common chronic respiratory disease, which is involved in a variety of cells and cellular components. In 2019, the guidelines for the diagnosis and treatment of asthma issued by the Global Initiative for Asthma (GINA) Committee put forward the concept of type 2 inflammatory asthma for the first time. The updated evolution of GINA guidelines has promoted the development of biological agents and disease treatment, providing effective prevention and treatment for patients with severe asthma and improving disease outcome. This paper expounds the disease mechanism and management suggestions of type 2 inflammatory asthma in GINA guidelines, and analyzes the relevant clinical studies on targeted treatment of type 2 inflammatory asthma in recent years, in order to provide reference for in-depth understanding of level 3 prevention and management of patients with type 2 inflammatory asthma.
Collapse
Affiliation(s)
- W C Guan
- Department of Respiratory Medicine, General Hospital of the Northern Theater Command of the Chinese People's Liberation Army, Shenyang 110016, China
| | - R N Chai
- Department of Respiratory Medicine, General Hospital of the Northern Theater Command of the Chinese People's Liberation Army, Shenyang 110016, China
| | - C Xu
- Department of Respiratory Medicine, General Hospital of the Northern Theater Command of the Chinese People's Liberation Army, Shenyang 110016, China
| | - X Z Wang
- Department of Respiratory Medicine, General Hospital of the Northern Theater Command of the Chinese People's Liberation Army, Shenyang 110016, China
| | - H H Huang
- Department of Respiratory Medicine, General Hospital of the Northern Theater Command of the Chinese People's Liberation Army, Shenyang 110016, China
| | - Y M Zhao
- Department of Respiratory Medicine, General Hospital of the Northern Theater Command of the Chinese People's Liberation Army, Shenyang 110016, China
| | - H M Zou
- Department of Respiratory Medicine, General Hospital of the Northern Theater Command of the Chinese People's Liberation Army, Shenyang 110016, China
| |
Collapse
|
2
|
Shen LJ, Zhuansun SY, Ni BW, Zhang MY, Lu SS, Hua YN, Xiao D, Huang HH, Han XF, Zhong L, Zhong H, Wang T, Hou J. [Effect of autologous hematopoietic stem cell transplantation on minimal residual disease in patients with multiple myeloma]. Zhonghua Yi Xue Za Zhi 2022; 102:2861-2867. [PMID: 36153871 DOI: 10.3760/cma.j.cn112137-20211224-02889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Objective: To evaluate the effect of autologous hematopoietic stem cell transplantation (ASCT) on minimal residual disease (MRD) in patients with multiple myeloma (MM). Method: From August 2018 to August 2021, 92 patients newly diagnosed with MM who had received either the bortezomib combined with cyclophosphamide and dexamethasone (VCD) or the bortezomib, lenalidomide and dexamethasone (VRD) induction regimens followed by sequential ASCT were assessed for overall survival (OS) and the MRD negative rate. The differences in efficacy at 100 days after transplantation were assessed according to factors, including age, risk stratification, target organ damage, and pre-transplant regimen, etc. Results: Among the 92 patients, there were 45 males and 47 females, with a median age of 57.3 (35-67) years. Fifty-seven patients received the VCD regimen, and 35 received VRD as induction regimen. Forty-three patients received busulphan combined with cyclophosphamide and etoposide (BCV), and 49 patients received high-dose melphan (HDM) regimen as pre-transplantation treatment. After transplantation, the total complete remission (CR) rate of 92 patients increased from 23.9% (22/92) to 58.7% (54/92), and the MRD negative rate increased from 4.4% (4/92) to 33.7% (31/92), and the differences were statistically significant (all P<0.05). After transplantation, the MRD negative rates of patients with PR, VGPR and ≥CR before transplantation were 17.6% (6/34), 33.3% (12/36) and 59.1% (13/22), respectively (P=0.006). The CR rates of patients with or without plasmacytoma at initial diagnosis were 36.4% (4/11) and 65.4% (53/81), respectively (P=0.029), and the MRD negative rates were 18.2% (2/11) and 39.5% (32/81), respectively (P=0.037), and the differences were statistically significant. The MRD negative rates in high-risk patients and standard-risk group were 30.5% (12/28) and 42.9% (18/59), respectively (P=0.258). For patients who achieved efficacy above VGPR before transplantation, the MRD negative rates after transplantation in VCD-induced group and VRD group were 29% (9/31) and 59.3% (16/27), respectively (P=0.033), and in BCV group and HDM group were 24% (6/25) and 57.6% (19/33), respectively (P=0.016), the differences between the groups were both statistically significant. Conclusion: ASCT can overcome the adverse factors such as high-risk cytogenetic abnormalities, and significantly improve the CR rate and MRD negative rate of MM patients. However, the benefit for patients with plasmacytoma at initial diagnosis is not as good as that of patients without.
Collapse
Affiliation(s)
- L J Shen
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - S Y Zhuansun
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - B W Ni
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - M Y Zhang
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - S S Lu
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Y N Hua
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - D Xiao
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - H H Huang
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - X F Han
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - L Zhong
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - H Zhong
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - T Wang
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - J Hou
- Department of Hematology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| |
Collapse
|
3
|
Kai F, Ou G, Tourdot RW, Stashko C, Gaietta G, Swift MF, Volkmann N, Long AF, Han Y, Huang HH, Northey JJ, Leidal AM, Viasnoff V, Bryant DM, Guo W, Wiita AP, Guo M, Dumont S, Hanein D, Radhakrishnan R, Weaver VM. ECM dimensionality tunes actin tension to modulate endoplasmic reticulum function and spheroid phenotypes of mammary epithelial cells. EMBO J 2022; 41:e109205. [PMID: 35880301 PMCID: PMC9434103 DOI: 10.15252/embj.2021109205] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 06/17/2022] [Accepted: 06/22/2022] [Indexed: 12/11/2022] Open
Abstract
Patient-derived organoids and cellular spheroids recapitulate tissue physiology with remarkable fidelity. We investigated how engagement with a reconstituted basement membrane in three dimensions (3D) supports the polarized, stress resilient tissue phenotype of mammary epithelial spheroids. Cells interacting with reconstituted basement membrane in 3D had reduced levels of total and actin-associated filamin and decreased cortical actin tension that increased plasma membrane protrusions to promote negative plasma membrane curvature and plasma membrane protein associations linked to protein secretion. By contrast, cells engaging a reconstituted basement membrane in 2D had high cortical actin tension that forced filamin unfolding and endoplasmic reticulum (ER) associations. Enhanced filamin-ER interactions increased levels of PKR-like ER kinase effectors and ER-plasma membrane contact sites that compromised calcium homeostasis and diminished cell viability. Consequently, cells with decreased cortical actin tension had reduced ER stress and survived better. Consistently, cortical actin tension in cellular spheroids regulated polarized basement membrane membrane deposition and sensitivity to exogenous stress. The findings implicate cortical actin tension-mediated filamin unfolding in ER function and underscore the importance of tissue mechanics in organoid homeostasis.
Collapse
Affiliation(s)
- FuiBoon Kai
- Department of Surgery, Center for Bioengineering and Tissue RegenerationUniversity of California San FranciscoSan FranciscoCAUSA
| | - Guanqing Ou
- Department of Surgery, Center for Bioengineering and Tissue RegenerationUniversity of California San FranciscoSan FranciscoCAUSA
| | - Richard W Tourdot
- Department of BioengineeringUniversity of PennsylvaniaPhiladelphiaPAUSA
- Department of Chemical and Biomolecular EngineeringUniversity of PennsylvaniaPhiladelphiaPAUSA
| | - Connor Stashko
- Department of Surgery, Center for Bioengineering and Tissue RegenerationUniversity of California San FranciscoSan FranciscoCAUSA
| | | | | | - Niels Volkmann
- Scintillon InstituteSan DiegoCAUSA
- Structural Image Analysis Unit, Department of Structural Biology and Chemistry, Institut PasteurUniversité Paris Cité, CNRS UMR3528ParisFrance
| | - Alexandra F Long
- Tetrad Graduate ProgramUniversity of California San FranciscoSan FranciscoCAUSA
- Department of Bioengineering and Therapeutic SciencesDepartment of Cell & Tissue Biology, University of California San FranciscoSan FranciscoCAUSA
| | - Yulong Han
- Department of Mechanical EngineeringMassachusetts Institute of TechnologyCambridgeMAUSA
| | - Hector H Huang
- Department of Laboratory MedicineUniversity of California San FranciscoSan FranciscoCAUSA
| | - Jason J Northey
- Department of Surgery, Center for Bioengineering and Tissue RegenerationUniversity of California San FranciscoSan FranciscoCAUSA
| | - Andrew M Leidal
- Department of PathologyUniversity of California San FranciscoSan FranciscoCAUSA
| | - Virgile Viasnoff
- Mechanobiology InstituteNational University of SingaporeSingapore CitySingapore
| | | | - Wei Guo
- Department of BiologyUniversity of PennsylvaniaPhiladelphiaPAUSA
| | - Arun P Wiita
- Department of Laboratory MedicineUniversity of California San FranciscoSan FranciscoCAUSA
| | - Ming Guo
- Department of Mechanical EngineeringMassachusetts Institute of TechnologyCambridgeMAUSA
| | - Sophie Dumont
- Department of Bioengineering and Therapeutic SciencesDepartment of Cell & Tissue Biology, University of California San FranciscoSan FranciscoCAUSA
- Chan Zuckerberg BiohubSan FranciscoCAUSA
| | - Dorit Hanein
- Scintillon InstituteSan DiegoCAUSA
- Structural Studies of Macromolecular Machines in Cellulo Unit, Department of Structural Biology and Chemistry, Institut PasteurUniversité Paris Cité, CNRS UMR3528ParisFrance
| | - Ravi Radhakrishnan
- Department of BioengineeringUniversity of PennsylvaniaPhiladelphiaPAUSA
- Department of Chemical and Biomolecular EngineeringUniversity of PennsylvaniaPhiladelphiaPAUSA
| | - Valerie M Weaver
- Department of Surgery, Center for Bioengineering and Tissue RegenerationUniversity of California San FranciscoSan FranciscoCAUSA
- Departments of Radiation Oncology and Bioengineering and Therapeutic Sciences, Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell ResearchUniversity of California San FranciscoSan FranciscoCAUSA
- UCSF Helen Diller Family Comprehensive Cancer CenterUniversity of California San FranciscoSan FranciscoCAUSA
| |
Collapse
|
4
|
Huang HH, Xu C, Liu L, Chai RN. [Efficacy comparison and safety analysis of subcutaneous specific immunotherapy with standardized house dust mite allergen in patients with single and multiple allergic rhinitis]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:774-783. [PMID: 35785859 DOI: 10.3760/cma.j.cn112150-20220120-00071] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the efficacy and safety of house dust mite (HDM) allergen subcutaneous specific immunotherapy (SCIT) in patients with allergic rhinitis (AR) with single dust mite allergy and multiple allergen allergy. Methods: A retrospective study was conducted. A total of 372 patients with allergic rhinitis induced by house dust mite were diagnosed in the allergy clinic of General Hospital of North Theater Command from January 2013 to January 2018.They were treated with house dust mite allergen preparation for standardized SCIT for 3 years or more, and had complete follow-up data. The age ranged from 5 to 55 years, the median age was 13 years, and the average age was (19.4±14.7) years; 216 males and 156 females. According to their age, they were divided into the older group (age >14 years) and younger group (age ≤ 14 years). According to the number of allergens, they were divided into single group (only HDM group allergic to house dust mites) and multi recombination (including 2 or more allergens including house dust mites). The multi recombination was further divided into HDM+1 group, HDM+2 group, HDM+3 group, HDM+4 and above group. Before treatment (T0), 1 year (T1) and 3 years (T2) after SCIT treatment, the patients in each group established files, analyzed and compared the average total nasal symptoms score (TNSS), total non nasal symptoms score (TNNSS), visual analogue scale (VAS), total medicine score (TMS) and rhinoconjunctivitis quality of life questionnaire (RQLQ), and evaluated the clinical efficacy of the treatment and the comparison of various scores in the efficacy of SCIT with different allergens and ages. Record the occurrence of local and systemic adverse reactions of all patients during treatment, and evaluate the safety of SCIT. All scores are measurement data that do not conform to normal distribution. Mann-Whitney U and Kruskai-Wallis test of independent samples are used for inter group comparison, and Bonferroni correction is used for further pairwise comparison; Chi square test and continuity correction method were used for the comparison between count data groups such as the incidence of adverse reactions and the effective rate of TNSS, and a-division method was used for further pairwise comparison. Results: After SCIT treatment, the scores of TNSS, TNNSS, TMS, VAS and RQLQ in T1 and T2 were significantly lower than those in T0, and the scores in T2 were significantly lower than those in T1 (Z=-11.168, -4.786, -6.639, -13.012, -10.652 in T0 vs T1; Z=-13.527, -8.746, -13.397, -14.477, -11.833 in T0 vs T2; Z=-4.721, -4.607, -10.020, -7.180, -5.721 in T1 vs T2; P<0.05). In T1 and T2, compared with the older group, the scores of TNSS, TNNSS, TMS, VAS and RQLQ in younger group were lower, and the differences of various indexes were statistically significant(the median scores of T1: Myounger=3.0, 1.0, 2.0, 4.0, 2.6, Molder=5.0, 2.0, 3.0, 5.0, 3.2; the median scores of T2: Myounger=3.0, 1.0, 0, 2.0, 1.3, Molder=4.0, 1.0, 1.5, 3.0, 2.3; ZT1=-4.525, -5.830, -4.061, -3.608, -2.785; ZT2=-3.847, -4.055, -2.820, -2.998, -3.418; P<0.05). In T1 and T2, the scores of TNSS, VAS and RQLQ in a single group after SCIT treatment were lower than those in multiple recombination(the median scores of T1:Msingle=4.0, 4.0, 2.6, Mmultiple=5.0, 5.0, 3.2; the median scores of T2: Msingle=3.0, 2.0, 1.4, Mmultiple=4.0, 3.0, 2.1), and the difference was statistically significant (ZT1=-3.002, -2.092, -1.977; ZT2=-3.354, -2.469, -2.116; P<0.05). There was no significant difference in TMS (the median score during T1 period: Msingle=2.0, Mmultiple=3.0, ZT1=-1.130; the median score during T2 period: Msingle=1.0, Mmultiple=1.0, ZT2=-1.544; P>0.05). Further comparison within the group showed that there was no significant difference in the improvement rate of TNSS during T2 period among HDM group, HDM+1 group, HDM+2 group and HDM+3 group (HDM vs HDM+1 group χ2=0.277, HDM vs HDM+2 group χ2=0.78, HDM vs HDM+3 group χ2=0.075, HDM+1 vs HDM+2 group χ2=0.057, HDM+1 vs HDM+3 group χ2=0.019, HDM+2 vs HDM+3 group χ2=0.003; P>0.005), the improvement rates were 92.5%, 90.3%, 89.1% and 89.5%. Respectively in HDM group,HDM+1 group, HDM+2 group, HDM+3 group, compared with HDM+4 and above group, the difference was statistically significant (χ2=26.144, 13.254, 15.144, 8.808; P<0.005). The improvement rate of TNSS in HDM+4 and above group was 60.9%. 122 patients had local adverse reactions during the treatment of SCIT, accounting for 32.8%. The local adverse reactions were 759 injections (15 336 injections in total), accounting for 4.95%. Most of them were swelling, dizziness, induration and pruritus at the injection site, which could be relieved by oral antihistamines or within 2 hours. There were 2 cases of local urticaria, once for each case. The symptoms were relieved within 1 week after oral antihistamine. No serious systemic adverse reactions occurred. Conclusion: Standardized SCIT may be a safe and effective treatment for AR patients, and the type of allergen may be one of the important factors affecting the efficacy of SCIT. The efficacy of SCIT was significant in AR patients with three or less allergens other than house dust mite.
Collapse
Affiliation(s)
- H H Huang
- Jinzhou Medical University Northern Theater Command General Hospital Postgraduate Training Base, Shenyang 110000, China
| | - C Xu
- Jinzhou Medical University Northern Theater Command General Hospital Postgraduate Training Base, Shenyang 110000, China
| | - L Liu
- Jinzhou Medical University Northern Theater Command General Hospital Postgraduate Training Base, Shenyang 110000, China
| | - R N Chai
- Department of Respiration,General Hospital of North Theater Command, Shenyang 110000, China
| |
Collapse
|
5
|
Ramachandran P, Xu G, Huang HH, Rice R, Zhou B, Lindpaintner K, Serie D. Serum Glycoprotein Markers in Nonalcoholic Steatohepatitis and Hepatocellular Carcinoma. J Proteome Res 2022; 21:1083-1094. [PMID: 35286803 PMCID: PMC8981307 DOI: 10.1021/acs.jproteome.1c00965] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Fatty liver disease progresses through stages of fat accumulation and inflammation to nonalcoholic steatohepatitis (NASH), fibrosis and cirrhosis, and eventually hepatocellular carcinoma (HCC). Currently available diagnostic tools for HCC lack sensitivity and specificity. In this study, we investigated the use of circulating serum glycoproteins to identify a panel of potential prognostic markers that may be indicative of progression from the healthy state to NASH and further to HCC. Serum samples were processed and analyzed using a novel high-throughput glycoproteomics platform. Our initial dataset contained healthy, NASH, and HCC serum samples. We analyzed 413 glycopeptides, representing 57 abundant serum proteins, and compared among the three phenotypes. We studied the normalized abundance of common glycoforms and found 40 glycopeptides with statistically significant differences in abundances in NASH and HCC compared to controls. Summary level relative abundances of core-fucosylated, sialylated, and branched glycans containing glycopeptides were higher in NASH and HCC as compared to controls. We replicated some of our findings in an independent set of samples of individuals with benign liver conditions and HCC. Our results may be of value in the management of liver diseases. Data generated in this work can be downloaded from MassIVE (https://massive.ucsd.edu) with identifier MSV000088809.
Collapse
Affiliation(s)
| | - Gege Xu
- InterVenn Biosciences, South San Francisco, California 94080, United States
| | - Hector H Huang
- InterVenn Biosciences, South San Francisco, California 94080, United States
| | - Rachel Rice
- InterVenn Biosciences, South San Francisco, California 94080, United States
| | - Bo Zhou
- InterVenn Biosciences, South San Francisco, California 94080, United States
| | - Klaus Lindpaintner
- InterVenn Biosciences, South San Francisco, California 94080, United States
| | - Daniel Serie
- InterVenn Biosciences, South San Francisco, California 94080, United States
| |
Collapse
|
6
|
Liu JY, Lin YHT, Leidal AM, Huang HH, Ye J, Wiita AP, Debnath J. GRASP55 restricts early-stage autophagy and regulates spatial organization of the early secretory network. Biol Open 2021; 10:272216. [PMID: 34533192 PMCID: PMC8524720 DOI: 10.1242/bio.058736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 09/07/2021] [Indexed: 02/04/2023] Open
Abstract
There is great interest in understanding the cellular mechanisms controlling autophagy, a tightly regulated catabolic and stress-response pathway. Prior work has uncovered links between autophagy and the Golgi reassembly stacking protein of 55 kDa (GRASP55), but their precise interrelationship remains unclear. Intriguingly, both autophagy and GRASP55 have been functionally and spatially linked to the endoplasmic reticulum (ER)-Golgi interface, broaching this compartment as a site where GRASP55 and autophagy may intersect. Here, we uncover that loss of GRASP55 enhances LC3 puncta formation, indicating that GRASP55 restricts autophagosome formation. Additionally, using proximity-dependent biotinylation, we identify a GRASP55 proximal interactome highly associated with the ER-Golgi interface. Both nutrient starvation and loss of GRASP55 are associated with coalescence of early secretory pathway markers. In light of these findings, we propose that GRASP55 regulates spatial organization of the ER-Golgi interface, which suppresses early autophagosome formation. Summary: The Golgi protein GRASP55 restricts early-stage autophagy and regulates spatial organization of the early secretory network. We also identify a GRASP55 proximal interactome enriched at the ER-Golgi interface.
Collapse
Affiliation(s)
- Jennifer Y Liu
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA 94143, USA
| | - Yu-Hsiu Tony Lin
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - Andrew M Leidal
- Department of Pathology, University of California San Francisco, San Francisco, CA 94143, USA
| | - Hector H Huang
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - Jordan Ye
- Department of Pathology, University of California San Francisco, San Francisco, CA 94143, USA
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - Jayanta Debnath
- Department of Pathology, University of California San Francisco, San Francisco, CA 94143, USA
| |
Collapse
|
7
|
Abstract
The objective in this study was to enhance osteogenic responses (in vitro and in vivo) to roughened titanium (Ti) dental implants through the formation of superhydrophilic TiO2 nanonetwork surface structure. Sandblasting and acid etching (SLA) was used to roughen the Ti surface. An electrochemical anodization process was then used to form a superhydrophilic TiO2 nanonetwork on the SLA Ti surfaces. The pore size of the nanonetwork structure ranged from a few nanometers to more than 100 nm, which is on the same scale as many biological species. Human bone marrow mesenchymal stem cells were used as an in vitro test model. The TiO2 nanonetwork structure was shown to have a significantly positive effect on hydrophilicity, protein adsorption, cell adhesion, cell migration, cell mineralization, and the gene and protein expression of osteogenic markers. The osseointegration of an anodized SLA screw-type Ti dental implant was investigated in vivo via implantation in the femur of New Zealand white rabbits for durations of 4 or 12 wk. The presence of a superhydrophilic surface TiO2 nanonetwork was shown to significantly enhance the bone-to-implant contact of the roughened SLA screw-type Ti dental implants. Overall, the proposed superhydrophilic TiO2 nanonetwork structure on the roughened SLA Ti surface proved highly effective in enhancing osteogenic responses in vitro and in vivo.
Collapse
Affiliation(s)
- W E Yang
- Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan.,Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - H H Huang
- Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Institute of Oral Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Bioinformatics and Medical Engineering, Asia University, Taichung, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.,Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Education and Research, Taipei City Hospital, Taipei, Taiwan
| |
Collapse
|
8
|
Wu Y, Lu JX, Yan ZZ, Liu YX, Gu WP, Fu XQ, Xu YC, Wu AH, Huang HH, Zong ZY, Jin DZ, Zhao JH, Chen Y, Liu WP, Li WG. [Interpretation of group standard for Clostridioides difficile infection diagnosis]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:64-67. [PMID: 33503698 DOI: 10.3760/cma.j.cn112338-20201026-01272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Clostridioides difficile is a key pathogen of antibiotic related diarrhea and hospital associated infection, causing several outbreaks in Europe and North Americans and resulting in severe disease burden. However, the standardized diagnostic principle and detection specifications in C. difficile infection (CDI) survey are limited in China, and the infection rate and disease burden of CDI in China are unclear. Therefore, National Institute for Communicable Disease Control and Prevention,National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, together with another 11 institutions, draft the group standard entitled "Diagnosis of Clostridium difficile infection (T/CPMA 008-2020)" of Chinese Preventive Medicine Association. Based on the principle of "legality, scientificity, advancement, and feasibility", this standard clarifies risk factors, diagnosis principles, diagnoses and differential diagnoses in order to improve the accuracy of CDI diagnosis in clinical practice, guide the surveillance for CDI, and understand the infection rate and disease burden of CDI in China.
Collapse
Affiliation(s)
- Y Wu
- National Institute for Communicable Disease Control and Prevention, Chines Center for Disease Control and Prevention, Beijing 102206, China
| | - J X Lu
- National Institute for Communicable Disease Control and Prevention, Chines Center for Disease Control and Prevention, Beijing 102206, China
| | - Z Z Yan
- Chinese People' s Liberation Army General Hospital, Beijing 100853, China
| | - Y X Liu
- Chinese People' s Liberation Army General Hospital, Beijing 100853, China
| | - W P Gu
- Yunnan Provincial Center for Disease Control and Prevention, Kunming 650022, China
| | - X Q Fu
- Yunnan Provincial Center for Disease Control and Prevention, Kunming 650022, China
| | - Y C Xu
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730,China
| | - A H Wu
- Xiangya Hospital of Central South University, Changsha 410008, China
| | - H H Huang
- Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Z Y Zong
- West China Hospital, Sichuan University, Chengdu 610041,China
| | - D Z Jin
- Hangzhou Medical College, Hangzhou 310053, China
| | - J H Zhao
- The Second Hospital of Hebei Medical University, Shijiazhuang 050061, China
| | - Y Chen
- Southern Hospital of Southern Medical University, Guangzhou 510515, China
| | - W P Liu
- Inner Mongolia Autonomous Region People' s Hospital, Hohhot 010017, China
| | - W G Li
- Shandong Provincial Hospital, Ji'nan 250021, China
| |
Collapse
|
9
|
Liu C, Jiang ZC, Shao CX, Zhang HG, Yue HM, Chen ZH, Ma BY, Liu WY, Huang HH, Yang J, Wang Y, Liu HY, Xu D, Wang JT, Yang JY, Pan HQ, Zou SQ, Li FJ, Lei JQ, Li X, He Q, Gu Y, Qi XL. [Preliminary study of the relationship between novel coronavirus pneumonia and liver function damage: a multicenter study]. Zhonghua Gan Zang Bing Za Zhi 2020; 28:107-111. [PMID: 32077660 DOI: 10.3760/cma.j.issn.1007-3418.2020.02.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Objective: To analyze the clinical characteristics of cases of novel coronavirus pneumonia and a preliminary study to explore the relationship between different clinical classification and liver damage. Methods: Consecutively confirmed novel coronavirus infection cases admitted to seven designated hospitals during January 23, 2020 to February 8, 2020 were included. Clinical classification (mild, moderate, severe, and critical) was carried out according to the diagnosis and treatment program of novel coronavirus pneumonia (Trial Fifth Edition) issued by the National Health Commission. The research data were analyzed using SPSS19.0 statistical software. Quantitative data were expressed as median (interquartile range), and qualitative data were expressed as frequency and rate. Results: 32 confirmed cases that met the inclusion criteria were included. 28 cases were of mild or moderate type (87.50%), and four cases (12.50%) of severe or critical type. Four cases (12.5%) were combined with one underlying disease (bronchial asthma, coronary heart disease, malignant tumor, chronic kidney disease), and one case (3.13%) was simultaneously combined with high blood pressure and malignant tumor. The results of laboratory examination showed that the alanine aminotransferase (ALT), aspartate aminotransferase (AST), albumin (ALB), and total bilirubin (TBil) for entire cohort were 26.98 (16.88 ~ 46.09) U/L and 24.75 (18.71 ~ 31.79) U/L, 39.00 (36.20 ~ 44.20) g/L and 16.40 (11.34 ~ 21.15) μmol/L, respectively. ALT, AST, ALB and TBil of the mild or moderate subgroups were 22.75 (16.31 ~ 37.25) U/L, 23.63 (18.71 ~ 26.50) U/L, 39.70 (36.50 ~ 46.10) g/L, and 15.95 (11.34 ~ 20.83) μmol/L, respectively. ALT, AST, ALB and TBil of the severe or critical subgroups were 60.25 (40.88 ~ 68.90) U/L, 37.00 (20.88 ~ 64.45) U/L, 35.75 (28.68 ~ 42.00) g/L, and 20.50 (11.28 ~ 25.00) μmol/L, respectively. Conclusion: The results of this multicenter retrospective study suggests that novel coronavirus pneumonia combined with liver damage is more likely to be caused by adverse drug reactions and systemic inflammation in severe patients receiving medical treatment. Therefore, liver function monitoring and evaluation should be strengthened during the treatment of such patients.
Collapse
Affiliation(s)
- C Liu
- COVID-19 study group, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Z C Jiang
- COVID-19 study group, Ankang Central Hospital, Ankang 725000, China
| | - C X Shao
- COVID-19 study group, Lishui Central Hospital, Lishui 323000, China
| | - H G Zhang
- COVID-19 study group, The Affiliated Third Hospital of Jiangsu University, Zhenjiang 212021, China
| | - H M Yue
- Department of Respiratory and Critical Care Medicine, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Z H Chen
- COVID-19 study group, The People's Hospital of Baoding, Baoding 071000, China
| | - B Y Ma
- COVID-19 study group, The People's Hospital of LinXia Hui Prefecture, Linxia 731100, China
| | - W Y Liu
- COVID-19 study group, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - H H Huang
- COVID-19 study group, Ankang Central Hospital, Ankang 725000, China
| | - J Yang
- COVID-19 study group, Lishui Central Hospital, Lishui 323000, China
| | - Y Wang
- COVID-19 study group, The Sixth People's Hospital of Shenyang, Shenyang 110006, China
| | - H Y Liu
- COVID-19 study group, The Sixth People's Hospital of Shenyang, Shenyang 110006, China
| | - D Xu
- COVID-19 study group, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - J T Wang
- COVID-19 study group, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - J Y Yang
- COVID-19 study group, The Sixth People's Hospital of Shenyang, Shenyang 110006, China
| | - H Q Pan
- COVID-19 study group, The Affiliated Third Hospital of Jiangsu University, Zhenjiang 212021, China
| | - S Q Zou
- COVID-19 study group, The Affiliated Third Hospital of Jiangsu University, Zhenjiang 212021, China
| | - F J Li
- COVID-19 study group, The People's Hospital of Baoding, Baoding 071000, China
| | - J Q Lei
- COVID-19 study group, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - X Li
- COVID-19 study group, The First Hospital of Lanzhou University, Lanzhou 730000, China
| | - Q He
- COVID-19 study group, The Third People's Hospital of Shenzhen, Shenzhen 518100, China
| | - Y Gu
- COVID-19 study group, The Sixth People's Hospital of Shenyang, Shenyang 110006, China
| | - X L Qi
- COVID-19 study group, The First Hospital of Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
10
|
Huang HH, Ferguson ID, Thornton AM, Bastola P, Lam C, Lin YHT, Choudhry P, Mariano MC, Marcoulis MD, Teo CF, Malato J, Phojanakong PJ, Martin TG, Wolf JL, Wong SW, Shah N, Hann B, Brooks AN, Wiita AP. Proteasome inhibitor-induced modulation reveals the spliceosome as a specific therapeutic vulnerability in multiple myeloma. Nat Commun 2020; 11:1931. [PMID: 32321912 PMCID: PMC7176739 DOI: 10.1038/s41467-020-15521-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [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: 02/15/2019] [Accepted: 03/13/2020] [Indexed: 02/06/2023] Open
Abstract
Enhancing the efficacy of proteasome inhibitors (PI) is a central goal in myeloma therapy. We proposed that signaling-level responses after PI may reveal new mechanisms of action that can be therapeutically exploited. Unbiased phosphoproteomics after treatment with the PI carfilzomib surprisingly demonstrates the most prominent phosphorylation changes on splicing related proteins. Spliceosome modulation is invisible to RNA or protein abundance alone. Transcriptome analysis after PI demonstrates broad-scale intron retention, suggestive of spliceosome interference, as well as specific alternative splicing of protein homeostasis machinery components. These findings lead us to evaluate direct spliceosome inhibition in myeloma, which synergizes with carfilzomib and shows potent anti-tumor activity. Functional genomics and exome sequencing further support the spliceosome as a specific vulnerability in myeloma. Our results propose splicing interference as an unrecognized modality of PI mechanism, reveal additional modes of spliceosome modulation, and suggest spliceosome targeting as a promising therapeutic strategy in myeloma.
Collapse
Affiliation(s)
- Hector H Huang
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Ian D Ferguson
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Alexis M Thornton
- Department of Biomolecular Engineering, University of California, Santa Cruz, CA, USA
| | - Prabhakar Bastola
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Christine Lam
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Yu-Hsiu T Lin
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Priya Choudhry
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Margarette C Mariano
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Makeba D Marcoulis
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Chin Fen Teo
- Department of Physiology, University of California, San Francisco, CA, USA
| | - Julia Malato
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA
| | - Paul J Phojanakong
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA
| | - Thomas G Martin
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.,Department of Medicine, University of California, San Francisco, CA, USA
| | - Jeffrey L Wolf
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.,Department of Medicine, University of California, San Francisco, CA, USA
| | - Sandy W Wong
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.,Department of Medicine, University of California, San Francisco, CA, USA
| | - Nina Shah
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.,Department of Medicine, University of California, San Francisco, CA, USA
| | - Byron Hann
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA
| | - Angela N Brooks
- Department of Biomolecular Engineering, University of California, Santa Cruz, CA, USA
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA. .,Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA, USA.
| |
Collapse
|
11
|
Leidal AM, Huang HH, Marsh T, Solvik T, Zhang D, Ye J, Kai F, Goldsmith J, Liu JY, Huang YH, Monkkonen T, Vlahakis A, Huang EJ, Goodarzi H, Yu L, Wiita AP, Debnath J. The LC3-conjugation machinery specifies the loading of RNA-binding proteins into extracellular vesicles. Nat Cell Biol 2020; 22:187-199. [PMID: 31932738 PMCID: PMC7007875 DOI: 10.1038/s41556-019-0450-y] [Citation(s) in RCA: 246] [Impact Index Per Article: 61.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 12/03/2019] [Indexed: 12/11/2022]
Abstract
Traditionally viewed as an autodigestive pathway, autophagy also facilitates cellular secretion; however, the mechanisms underlying these processes remain unclear. Here, we demonstrate that components of the autophagy machinery specify secretion within extracellular vesicles (EVs). Using a proximity-dependent biotinylation proteomics strategy, we identify 200 putative targets of LC3-dependent secretion. This secretome consists of a highly interconnected network enriched in RNA-binding proteins (RBPs) and EV cargoes. Proteomic and RNA profiling of EVs identifies diverse RBPs and small non-coding RNAs requiring the LC3-conjugation machinery for packaging and secretion. Focusing on two RBPs, heterogeneous nuclear ribonucleoprotein K (HNRNPK) and scaffold-attachment factor B (SAFB), we demonstrate that these proteins interact with LC3 and are secreted within EVs enriched with lipidated LC3. Furthermore, their secretion requires the LC3-conjugation machinery, neutral sphingomyelinase 2 (nSMase2) and LC3-dependent recruitment of factor associated with nSMase2 activity (FAN). Hence, the LC3-conjugation pathway controls EV cargo loading and secretion.
Collapse
Affiliation(s)
- Andrew M Leidal
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Hector H Huang
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Timothy Marsh
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Tina Solvik
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Dachuan Zhang
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Jordan Ye
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - FuiBoon Kai
- Department of Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Juliet Goldsmith
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Jennifer Y Liu
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Yu-Hsin Huang
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Teresa Monkkonen
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Ariadne Vlahakis
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Eric J Huang
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA
| | - Hani Goodarzi
- Department of Biochemistry and Biophysics, Department of Urology, and Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA, USA
| | - Li Yu
- State Key Laboratory of Membrane Biology, Tsinghua University-Peking University Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Jayanta Debnath
- Department of Pathology and Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, USA.
| |
Collapse
|
12
|
Abstract
Transition metal dichalcogenides (TMDs) show wide ranges of electronic properties ranging from semiconducting, semi-metallic to metallic due to their remarkable structural differences. To obtain 2D TMDs with specific properties, it is extremely important to develop particular strategies to obtain specific phase structures. Phase engineering is a traditional method to achieve transformation from one phase to another controllably. Control of such transformations enables the control of properties and access to a range of properties, otherwise inaccessible. Then extraordinary structural, electronic and optical properties lead to a broad range of potential applications. In this review, we introduce the various electronic properties of 2D TMDs and their polymorphs, and strategies and mechanisms for phase transitions, and phase transition kinetics. Moreover, the potential applications of 2D TMDs in energy storage and conversion, including electro/photocatalysts, batteries/supercapacitors and electronic devices, are also discussed. Finally, opportunities and challenges are highlighted. This review may further promote the development of TMD phase engineering and shed light on other two-dimensional materials of fundamental interest and with potential ranges of applications.
Collapse
Affiliation(s)
- H H Huang
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun, 130012, China.
| | - Xiaofeng Fan
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun, 130012, China.
| | - David J Singh
- Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211-7010, USA and Department of Chemistry, University of Missouri, Columbia, Missouri 65211, USA
| | - W T Zheng
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun, 130012, China. and State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130012, China.
| |
Collapse
|
13
|
Huang HH, Liu FB, Ruan Z, Zheng J, Su YJ, Wang J. Tetramethylpyrazine (TMPZ) triggers S-phase arrest and mitochondria-dependent apoptosis in lung cancer cells. Neoplasma 2019; 65:367-375. [PMID: 29788725 DOI: 10.4149/neo_2018_170112n26] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 07/19/2017] [Indexed: 01/18/2023]
Abstract
Tetramethylpyrazine (TMPZ) is one of the active compounds extracted from the traditional Chinese herb Chuanxiong. Several studies have shown its anti-cancer properties. However, its functions in lung cancer and the underlying cellular mechanisms are relatively unknown. Our present study aimed to investigate the effects of TMPZ on A549 and 95D cells. The MTT assay showed that TMPZ decreased cell viability in a dose- and time-dependent manner. The results of the colony formation assay indicated that TMPZ strongly suppressed colony formation ability in A549 and 95D cells. Flow cytometric analysis revealed that TMPZ induced S phase arrest in lung cancer cells. In addition, TMPZ induced apoptosis, as shown by the results of propidium iodide/Annexin V double-staining. Furthermore, TMPZ decreased mitochondrial membrane potential (∆Ψm) in a dose-dependent manner. Finally, western blot analysis of TMPZ-treated cells revealed the activation of Caspase-3 and the increase of the ratio of Bax/Bcl-2. These results demonstrated that TMPZ could suppress carcinogenesis of lung cancer cells through blocking cell cycle and inducing mitochondria-dependent apoptosis by regulating Caspase-3 and Bax/Bcl-2, suggesting that TMPZ may be a promising drug to treat lung cancer.
Collapse
Affiliation(s)
- H H Huang
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - F B Liu
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - Z Ruan
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - J Zheng
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - Y J Su
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - J Wang
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| |
Collapse
|
14
|
Abstract
Zirconia (ZrO2) dental implants provide good biocompatibility, have good corrosion resistance, and have a color that is similar to that of natural teeth. Unfortunately, ZrO2 is a bioinert material and therefore achieves osseointegration difficultly. In this study, we sought to enhance osseointegration by producing rough ZrO2 surfaces that contain hydroxyl groups (designated ZSA) through the use of sandblasting in conjunction with alkaline treatment. We immobilized type I collagen on ZSA surfaces using the natural cross-linker, procyanidin. Our results further showed that surfaces produced in ZSA-P/C featured more and steadier type I collagen than surfaces produced in ZSA-C. The ZSA-P/C also presented superior cell responses in terms of adhesion, proliferation, and mineralization of human bone marrow mesenchymal stem cells. The enhanced cell responses in the ZSA-P/C were induced through the prolonged activation of focal adhesion kinase, AKT (the phosphoinositide 3-kinase pathway), and p38 (the mitogen-activated protein kinase pathway). The simple and novel approach to immobilize type I collagen on roughened ZrO2 surfaces presented in this article can likely benefit dental implant applications.
Collapse
Affiliation(s)
- C M Hsu
- 1 Department of Dentistry, National Yang-Ming University, Taipei, Taiwan
| | - Y S Sun
- 1 Department of Dentistry, National Yang-Ming University, Taipei, Taiwan
| | - H H Huang
- 1 Department of Dentistry, National Yang-Ming University, Taipei, Taiwan.,2 Institute of Oral Biology, National Yang-Ming University, Taipei, Taiwan.,3 Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan.,4 Department of Education and Research, Taipei City Hospital, Taipei, Taiwan.,5 Department of Bioinformatics and Medical Engineering, Asia University, Taichung, Taiwan.,6 Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,7 Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
| |
Collapse
|
15
|
Zhang HF, Huang HH, Zhao YJ, Li QR, Qi YZ, Zhou H. [Effects of benzo(a)pyrene on expressions of insulin-degrading enzyme and neprilysin in neuroglia cells]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:401-407. [PMID: 29930405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To investigate effects of benzo(a)pyrene (BaP) on expressions of insulin-degrading enzyme (IDE) and neprilysin (NEP) which have the ability to degrade β-amyloid (Aβ) in neuroglia cells. METHODS Primary mix-neuroglia cells were cultured from newborn SD rats. After exposure to BaP, Aβ1-42 oligomer or Aβ1-42 fiber individually or jointly for 24 h, the cell survival rate was measured by cell counting kit-8 (CCK-8). Afterwards, the primary mix-neuroglia cells were divided randomly into six groups: Control group, BaP group (2.00 μmol/L), Aβ1-42 oligomer group (20.00 mg/L), BaP plus Aβ1-42 oligomer group, Aβ1-42 fiber group (20.00 mg/L) and BaP plus Aβ1-42 fiber group, of which BaP was pretreated for 12 h followed by cotreatment with different aggregated Aβ1-42. The expressions of IDE and NEP were measured by quantitative real-time polymerase chain reaction (qRT-PCR) for mRNA level and Western blotting for protein level. RESULTS The cell survival rate showed no significant differences after treatment with BaP (≤20.00 μmol/L), Aβ1-42 oligomer (20.00, 40.00 mg/L), Aβ1-42 fiber (20.00, 40.00 mg/L) or cotreatment with BaP and Aβ1-42 oligomer or BaP and Aβ1-42 fiber. Compared with the control group, expressions of IDE and NEP in BaP-treated alone group had no obvious change; however, exposure to Aβ1-42 oligomer alone significantly increased the mRNA and protein level of IDE (P<0.05), and the BaP pretreatment could significantly inhibit the up-regulated expressions of IDE by Aβ1-42 oligomer (P<0.05); on the other hand, exposure either to Aβ1-42 fiber alone or under the BaP pretreatment did not change the mRNA and protein level of IDE and NEP obviously. CONCLUSION On the premise of no significant change of cell survival rate, BaP pretreatment inhibited the up-regulated expressions of IDE in primary mixed neuroglia cells under cotreatment with Aβ oligomer, indicating that BaP may disturb degradation of Aβ oligomer and cause deposition of β-amyloid and further induce cognitive decline and acceleration of Alzheimer.
Collapse
Affiliation(s)
- H F Zhang
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - H H Huang
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - Y J Zhao
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - Q R Li
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - Y Z Qi
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| | - H Zhou
- Department of Occupational and Environmental Health, Peking University School of Public Health, Beijing 100191, China
| |
Collapse
|
16
|
Gnanapragasam VJ, Bratt O, Muir K, Lee LS, Huang HH, Stattin P, Lophatananon A. The Cambridge Prognostic Groups for improved prediction of disease mortality at diagnosis in primary non-metastatic prostate cancer: a validation study. BMC Med 2018; 16:31. [PMID: 29490658 PMCID: PMC5831573 DOI: 10.1186/s12916-018-1019-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 02/08/2018] [Indexed: 03/16/2023] Open
Abstract
BACKGROUND The purpose of this study is to validate a new five-tiered prognostic classification system to better discriminate cancer-specific mortality in men diagnosed with primary non-metastatic prostate cancer. METHODS We applied a recently described five-strata model, the Cambridge Prognostic Groups (CPGs 1-5), in two international cohorts and tested prognostic performance against the current standard three-strata classification of low-, intermediate- or high-risk disease. Diagnostic clinico-pathological data for men obtained from the Prostate Cancer data Base Sweden (PCBaSe) and the Singapore Health Study were used. The main outcome measure was prostate cancer mortality (PCM) stratified by age group and treatment modality. RESULTS The PCBaSe cohort included 72,337 men, of whom 7162 died of prostate cancer. The CPG model successfully classified men with different risks of PCM with competing risk regression confirming significant intergroup distinction (p < 0.0001). The CPGs were significantly better at stratified prediction of PCM compared to the current three-tiered system (concordance index (C-index) 0.81 vs. 0.77, p < 0.0001). This superiority was maintained for every age group division (p < 0.0001). Also in the ethnically different Singapore cohort of 2550 men with 142 prostate cancer deaths, the CPG model outperformed the three strata categories (C-index 0.79 vs. 0.76, p < 0.0001). The model also retained superior prognostic discrimination in the treatment sub-groups: radical prostatectomy (n = 20,586), C-index 0.77 vs. 074; radiotherapy (n = 11,872), C-index 0.73 vs. 0.69; and conservative management (n = 14,950), C-index 0.74 vs. 0.73. The CPG groups that sub-divided the old intermediate-risk (CPG2 vs. CPG3) and high-risk categories (CPG4 vs. CPG5) significantly discriminated PCM outcomes after radical therapy or conservative management (p < 0.0001). CONCLUSIONS This validation study of nearly 75,000 men confirms that the CPG five-tiered prognostic model has superior discrimination compared to the three-tiered model in predicting prostate cancer death across different age and treatment groups. Crucially, it identifies distinct sub-groups of men within the old intermediate-risk and high-risk criteria who have very different prognostic outcomes. We therefore propose adoption of the CPG model as a simple-to-use but more accurate prognostic stratification tool to help guide management for men with newly diagnosed prostate cancer.
Collapse
Affiliation(s)
- V J Gnanapragasam
- Academic Urology Group, Department of Surgery and Oncology, University of Cambridge, Box 279 (S4), Cambridge Biomedical Campus, Cambridge, CB2 0QQ, UK. .,Addenbrookes Hospital, Department of Urology, Addenbrooke's Hospital, Cambridge, UK.
| | - O Bratt
- Department of Translational Medicine, Division of Urological Cancers, Lund University, Lund, Sweden
| | - K Muir
- Institute of Population Health, University of Manchester, Manchester, UK
| | - L S Lee
- Department of Urology, Singapore General Hospital, Singapore, Singapore
| | - H H Huang
- Department of Urology, Singapore General Hospital, Singapore, Singapore
| | - P Stattin
- Department of Surgical and Perioperative Science, Urology and Andrology, Umeå University, Umeå, Sweden.,Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - A Lophatananon
- Institute of Population Health, University of Manchester, Manchester, UK
| |
Collapse
|
17
|
Liu TY, Huang HH, Wheeler D, Xu Y, Wells JA, Song YS, Wiita AP. Time-Resolved Proteomics Extends Ribosome Profiling-Based Measurements of Protein Synthesis Dynamics. Cell Syst 2017; 4:636-644.e9. [PMID: 28578850 DOI: 10.1016/j.cels.2017.05.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [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: 11/14/2016] [Revised: 02/17/2017] [Accepted: 05/05/2017] [Indexed: 10/19/2022]
Abstract
Ribosome profiling is a widespread tool for studying translational dynamics in human cells. Its central assumption is that ribosome footprint density on a transcript quantitatively reflects protein synthesis. Here, we test this assumption using pulsed-SILAC (pSILAC) high-accuracy targeted proteomics. We focus on multiple myeloma cells exposed to bortezomib, a first-line chemotherapy and proteasome inhibitor. In the absence of drug effects, we found that direct measurement of protein synthesis by pSILAC correlated well with indirect measurement of synthesis from ribosome footprint density. This correlation, however, broke down under bortezomib-induced stress. By developing a statistical model integrating longitudinal proteomic and mRNA-sequencing measurements, we found that proteomics could directly detect global alterations in translational rate caused by bortezomib; these changes are not detectable by ribosomal profiling alone. Further, by incorporating pSILAC data into a gene expression model, we predict cell-stress specific proteome remodeling events. These results demonstrate that pSILAC provides an important complement to ribosome profiling in measuring proteome dynamics.
Collapse
Affiliation(s)
- Tzu-Yu Liu
- Computer Science Division, University of California, Berkeley, Berkeley, CA 94720, USA; Departments of Mathematics and Biology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hector H Huang
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA 94107, USA
| | - Diamond Wheeler
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA 94107, USA; Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Yichen Xu
- Department of Urology, University of California, San Francisco, San Francisco, CA 94158, USA
| | - James A Wells
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Yun S Song
- Computer Science Division, University of California, Berkeley, Berkeley, CA 94720, USA; Departments of Mathematics and Biology, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Statistics, University of California, Berkeley, Berkeley, CA 94720, USA.
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA 94107, USA.
| |
Collapse
|
18
|
Chai H, Huang HH, Jiang HK, Liang Y, Xia LY. Protein-protein interaction network construction for cancer using a new L1/2-penalized Net-SVM model. Genet Mol Res 2016; 15:gmr8794. [PMID: 27525863 DOI: 10.4238/gmr.15038794] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Identifying biomarker genes and characterizing interaction pathways with high-dimensional and low-sample size microarray data is a major challenge in computational biology. In this field, the construction of protein-protein interaction (PPI) networks using disease-related selected genes has garnered much attention. Support vector machines (SVMs) are commonly used to classify patients, and a number of useful tools such as lasso, elastic net, SCAD, or other regularization methods can be combined with SVM models to select genes that are related to a disease. In the current study, we propose a new Net-SVM model that is different from other SVM models as it is combined with L1/2-norm regularization, which has good performance with high-dimensional and low-sample size microarray data for cancer classification, gene selection, and PPI network construction. Both simulation studies and real data experiments demonstrated that our proposed method outperformed other regularization methods such as lasso, SCAD, and elastic net. In conclusion, our model may help to select fewer but more relevant genes, and can be used to construct simple and informative PPI networks that are highly relevant to cancer.
Collapse
Affiliation(s)
- H Chai
- State Key Laboratory of Quality Research in Chinese Medicines & Faculty of Information Technology, Macau University of Science and Technology, Taipa, Macau, China
| | - H H Huang
- State Key Laboratory of Quality Research in Chinese Medicines & Faculty of Information Technology, Macau University of Science and Technology, Taipa, Macau, China
| | - H K Jiang
- State Key Laboratory of Quality Research in Chinese Medicines & Faculty of Information Technology, Macau University of Science and Technology, Taipa, Macau, China
| | - Y Liang
- State Key Laboratory of Quality Research in Chinese Medicines & Faculty of Information Technology, Macau University of Science and Technology, Taipa, Macau, China
| | - L Y Xia
- State Key Laboratory of Quality Research in Chinese Medicines & Faculty of Information Technology, Macau University of Science and Technology, Taipa, Macau, China
| |
Collapse
|
19
|
Wang J, Huang HH, Liu FB. ZNF185 inhibits growth and invasion of lung adenocarcinoma cells through inhibition of the akt/gsk3β pathway. J BIOL REG HOMEOS AG 2016; 30:683-691. [PMID: 27655485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Zinc finger (ZNF) proteins, a diverse family of proteins, have multiple biological functions in cancer. Increased expression of ZNF185 has been involved in the regulation of tumor growth and metastasis. However, the function and underlying mechanisms of ZNF185 in the tumorigenesis of lung adenocarcinoma (LAC) remain unclear. The protein expression of ZNF185 was examined in human LAC tissues by immunohistochemical assay. After lentiviral vector-mediated ZNF185 overexpression was infected into the LAC cell lines (A549 and LETPα-2), cell growth and invasive potential were respectively evaluated by MTT and Transwell assays. We found that the protein expression of ZNF185 was significantly downregulated in LAC tissues compared with the adjacent non-cancerous tissues (ANCT) (37.10% vs 58.06%, P=0.015), and was negatively correlated with the lymph node metastasis of the LAC patients (P=0.005). Furthermore, overexpression of ZNF185 reduced cell proliferation and invasion in LAC cells, followed by the downregulation of p-AKT, p-GSK3β, VEGF and MMP-9 expression. Taken together, our findings indicate that the decreased expression of ZNF185 is linked to the tumor metastasis in human LAC patients, and ZNF185 overexpression inhibits the growth and invasion of LAC cells through inhibition of the AKT/GSK3β signaling, suggesting that ZNF185 may represent a potential therapeutic target for the treatment of LAC.
Collapse
Affiliation(s)
- J Wang
- Department of Thoracic Surgery, The First Peoples Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - H H Huang
- Department of Thoracic Surgery, The First Peoples Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - F B Liu
- Department of Thoracic Surgery, The First Peoples Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| |
Collapse
|
20
|
Ori-McKenney KM, McKenney RJ, Huang HH, Li T, Meltzer S, Jan LY, Vale RD, Wiita AP, Jan YN. Phosphorylation of β-Tubulin by the Down Syndrome Kinase, Minibrain/DYRK1a, Regulates Microtubule Dynamics and Dendrite Morphogenesis. Neuron 2016; 90:551-63. [PMID: 27112495 DOI: 10.1016/j.neuron.2016.03.027] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 02/02/2016] [Accepted: 03/16/2016] [Indexed: 12/31/2022]
Abstract
Dendritic arborization patterns are consistent anatomical correlates of genetic disorders such as Down syndrome (DS) and autism spectrum disorders (ASDs). In a screen for abnormal dendrite development, we identified Minibrain (MNB)/DYRK1a, a kinase implicated in DS and ASDs, as a regulator of the microtubule cytoskeleton. We show that MNB is necessary to establish the length and cytoskeletal composition of terminal dendrites by controlling microtubule growth. Altering MNB levels disrupts dendrite morphology and perturbs neuronal electrophysiological activity, resulting in larval mechanosensation defects. Using in vivo and in vitro approaches, we uncover a molecular pathway whereby direct phosphorylation of β-tubulin by MNB inhibits tubulin polymerization, a function that is conserved for mammalian DYRK1a. Our results demonstrate that phosphoregulation of microtubule dynamics by MNB/DYRK1a is critical for dendritic patterning and neuronal function, revealing a previously unidentified mode of posttranslational microtubule regulation in neurons and uncovering a conserved pathway for a DS- and ASD-associated kinase.
Collapse
Affiliation(s)
- Kassandra M Ori-McKenney
- Department of Physiology and Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Richard J McKenney
- Department of Cellular and Molecular Pharmacology and Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Hector H Huang
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Tun Li
- Department of Physiology and Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Shan Meltzer
- Department of Physiology and Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Lily Yeh Jan
- Department of Physiology and Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Ronald D Vale
- Department of Cellular and Molecular Pharmacology and Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Yuh Nung Jan
- Department of Physiology and Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158, USA.
| |
Collapse
|
21
|
Affiliation(s)
- Adam W. Smith
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Department
of Chemistry, University of Akron, Akron, Ohio 44303, United States
| | - Hector H. Huang
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Howard
Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, United States
| | - Nicholas F. Endres
- Howard
Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, United States
| | - Christopher Rhodes
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Jay T. Groves
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| |
Collapse
|
22
|
Huang HH, Fan X, Hu CQ, Singh DJ, Jiang Q, Zheng WT. Transformation of electronic properties and structural phase transition from HfN to Hf3N4. J Phys Condens Matter 2015; 27:225501. [PMID: 25985389 DOI: 10.1088/0953-8984/27/22/225501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report investigation of the structural phase transition and electronic properties of Hf(1-x)N (0 ⩽ x ⩽ 0.25) using first principles calculations. The defective NaCl-type structure with Hf vacancies (V(Hf)) is found to be stable over a large phase region. Hf3N4 with the Zr3N4-type structure is only stable in relative small region and readily destabilized when the stoichiometric ratio of N to Hf deviates from 4/3. The electronic and optic properties of Hf(1-x)N are controlled by the concentration of V(Hf). The full depletion of excess free electrons from Hf atoms results in the structural phase transition of Hf3N4.
Collapse
Affiliation(s)
- H H Huang
- College of Materials Science and Engineering, Jilin University, Changchun 130012, People's Republic of China
| | | | | | | | | | | |
Collapse
|
23
|
Zhou FF, Wu S, Klena JD, Huang HH. Clinical characteristics of Clostridium difficile infection in hospitalized patients with antibiotic-associated diarrhea in a university hospital in China. Eur J Clin Microbiol Infect Dis 2014; 33:1773-9. [PMID: 24820293 DOI: 10.1007/s10096-014-2132-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [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] [Received: 03/03/2014] [Accepted: 04/21/2014] [Indexed: 12/12/2022]
Abstract
The purpose of this study was to identify clinical characteristics of Clostridium difficile infection (CDI) in patients with antibiotic-associated diarrhea (AAD). A prospective study was conducted among patients hospitalized in Fudan University Hospital Huashan from August 1, 2012 to July 31, 2013. Toxigenic C. difficile isolates were characterized by PCR ribotyping and multilocus sequence typing. AAD developed in 1.0 % (206/20437) of the antibiotic-treated hospitalized patients and toxigenic C. difficile was isolated from 30.6 % (63/206) of patients with AAD. The frequency of AAD was highest in the intensive care unit (10.7 %); however the proportion of CDI in AAD was highest in the Geriatric Unit (38 %). AAD ranged in severity from mild to moderate. One case with pseudomembranous colitis was identified. Use of carbapenems was found to significantly increase the risk of CDI (OR, 2.31; 95 % CI, 1.22-4.38; p = 0.011). Patient demographics, presumed risk factors, clinical manifestations and laboratory findings revealed no significant difference between patients with CDI and non-C. difficile AAD. Over 90 % of the patients with CDI or non-C. difficile AAD were cured. Two patients had CDI recurrence. Ribotype H was the dominant (18.8 %) genotype, followed by ribotype 012 and ribotype 017. C. difficile plays a significant role in AAD in our setting in China. Because the severity of diarrhea ranges from mild to moderate, it is difficult for Chinese clinicians to identify CDI from AAD patients, therefore CDI should be included in the routine differential diagnoses for hospitalized patients presenting with AAD.
Collapse
Affiliation(s)
- F F Zhou
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | | | | | | |
Collapse
|
24
|
Wu WL, Huang YD, Hsu KE, Wang YH, Huang HH, Hsiung WC, Chen SM, Chang HS, Chu CP, Chung YJ, Huang YT. A health risk assessment of reclaimed municipal wastewater for industrial and miscellaneous use. Water Sci Technol 2014; 70:750-756. [PMID: 25116508 DOI: 10.2166/wst.2014.291] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The study evaluated the safety of reclaimed water using health risk assessment and biotoxicity tests. The reclaimed water was produced from reverse osmosis and used in industrial and miscellaneous purposes. The health risk assessment was conducted based on the concentrations of detectable pollutants in reclaimed water in a hypothetical scenario. The estimated carcinogenic and non-carcinogenic risks are lower than the generally accepted level. Biotoxicity evaluation included three genotoxicity tests, a chronic toxicity test using medaka fishes, and a subchronic toxicity test using mice. The reclaimed water is not genetically toxic, and does not cause significant chronic effects on these model organisms. These results confirm the safety of using reclaimed water from municipal wastewater treatment plants.
Collapse
Affiliation(s)
- W L Wu
- Environment Engineering Research Center, Sinotech Engineering Consultants, Inc., 6F, 280, Xinhu 2nd Rd., Neihu Dist., Taipei, 114, Taiwan (R.O.C.) E-mail:
| | - Y D Huang
- Environment Engineering Research Center, Sinotech Engineering Consultants, Inc., 6F, 280, Xinhu 2nd Rd., Neihu Dist., Taipei, 114, Taiwan (R.O.C.) E-mail:
| | - K E Hsu
- Environment Engineering Research Center, Sinotech Engineering Consultants, Inc., 6F, 280, Xinhu 2nd Rd., Neihu Dist., Taipei, 114, Taiwan (R.O.C.) E-mail:
| | - Y H Wang
- Environment Engineering Research Center, Sinotech Engineering Consultants, Inc., 6F, 280, Xinhu 2nd Rd., Neihu Dist., Taipei, 114, Taiwan (R.O.C.) E-mail:
| | - H H Huang
- Environment Engineering Research Center, Sinotech Engineering Consultants, Inc., 6F, 280, Xinhu 2nd Rd., Neihu Dist., Taipei, 114, Taiwan (R.O.C.) E-mail:
| | - W C Hsiung
- Department of Aquatic Sciences, National Chiayi University, 300, Syuefu Rd., Chiayi, 600, Taiwan (R.O.C.)
| | - S M Chen
- Department of Aquatic Sciences, National Chiayi University, 300, Syuefu Rd., Chiayi, 600, Taiwan (R.O.C.)
| | - H S Chang
- Program for Translation Medicine, College of Medical Science and Technology, Taipei Medical University, 250 Wu-Hsing Street, Taipei, 110, Taiwan (R.O.C.)
| | - C P Chu
- Environment Engineering Research Center, Sinotech Engineering Consultants, Inc., 6F, 280, Xinhu 2nd Rd., Neihu Dist., Taipei, 114, Taiwan (R.O.C.) E-mail:
| | - Y J Chung
- Environment Engineering Research Center, Sinotech Engineering Consultants, Inc., 6F, 280, Xinhu 2nd Rd., Neihu Dist., Taipei, 114, Taiwan (R.O.C.) E-mail:
| | - Y T Huang
- Water Resource Planning Institute, Water Resource Agency, 1340, Jhong-Jheng Rd., Wu-Fong, Taichung, 413, Taiwan (R.O.C.)
| |
Collapse
|
25
|
Huang HH, Sun CT. Anomalous wave propagation in a one-dimensional acoustic metamaterial having simultaneously negative mass density and Young's modulus. J Acoust Soc Am 2012; 132:2887-2895. [PMID: 23039555 DOI: 10.1121/1.4744977] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A mechanical model representing an acoustic metamaterial that exhibits simultaneously negative mass density and negative Young's modulus was proposed. Wave propagation was studied in the frequency range of double negativity. In view of positive energy flow, it was found that the phase velocity in this range is negative. This phenomenon was also observed using transient wave propagation finite-element analyses of a transient sinusoidal wave and a transient wave packet. In contrast to wave propagation in the region of positive mass and modulus, the peculiar backward wave motion in the region of double negativity was clearly displayed.
Collapse
Affiliation(s)
- H H Huang
- Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei 10617, Taiwan
| | | |
Collapse
|
26
|
Abstract
This study examines the dynamic co-localization of lipid-anchored fluorescent proteins in living cells using pulsed-interleaved excitation fluorescence cross-correlation spectroscopy (PIE-FCCS) and fluorescence lifetime analysis. Specifically, we look at the pairwise co-localization of anchors from lymphocyte cell kinase (LCK: myristoyl, palmitoyl, palmitoyl), RhoA (geranylgeranyl), and K-Ras (farnesyl) proteins in different cell types. In Jurkat cells, a density-dependent increase in cross-correlation among RhoA anchors is observed, while LCK anchors exhibit a more moderate increase and broader distribution. No correlation was detected among K-Ras anchors or between any of the different anchor types studied. Fluorescence lifetime data reveal no significant Förster resonance energy transfer in any of the data. In COS 7 cells, minimal correlation was detected among LCK or RhoA anchors. Taken together, these observations suggest that some lipid anchors take part in anchor-specific co-clustering with other existing clusters of native proteins and lipids in the membrane. Importantly, these observations do not support a simple interpretation of lipid anchor-mediated organization driven by partitioning based on binary lipid phase separation.
Collapse
Affiliation(s)
- Sara B Triffo
- Howard Hughes Medical Institute, Department of Chemistry, University of California, Berkeley, California 94720, USA
| | | | | | | | | |
Collapse
|
27
|
Huang HH, Triffo SB, Smith AW, Groves JT. Differential Clustering of Membrane Anchors Observed by FCCS in Live Cells. Biophys J 2011. [DOI: 10.1016/j.bpj.2010.12.317] [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] Open
|
28
|
Triffo SB, Huang HH, Smith AW, Groves JT. Concentration Dependent Membrane Anchor Colocalization Study by Fluorescence Cross-Correlation Spectroscopy in Live Cells. Biophys J 2011. [DOI: 10.1016/j.bpj.2010.12.3624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
29
|
Lay CH, Chang FY, Chu CY, Chen CC, Chi YC, Hsieh TT, Huang HH, Lin CY. Enhancement of anaerobic biohydrogen/methane production from cellulose using heat-treated activated sludge. Water Sci Technol 2011; 63:1849-1854. [PMID: 21902022 DOI: 10.2166/wst.2011.390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Anaerobic digestion is an effective technology to convert cellulosic wastes to methane and hydrogen. Heat-treatment is a well known method to inhibit hydrogen-consuming bacteria in using anaerobic mixed cultures for seeding. This study aims to investigate the effects of heat-treatment temperature and time on activated sludge for fermentative hydrogen production from alpha-cellulose by response surface methodology. Hydrogen and methane production was evaluated based on the production rate and yield (the ability of converting cellulose into hydrogen and methane) with heat-treated sludge as the seed at various temperatures (60-97 degrees C) and times (20-60 min). Batch experiments were conducted at 55 degrees C and initial pH of 8.0. The results indicate that hydrogen and methane production yields peaked at 4.3 mmol H2/g cellulose and 11.6 mmol CH4/g cellulose using the seed activated sludge that was thermally treated at 60 degrees C for 40 min. These parameter values are higher than those of no-treatment seed (HY 3.6 mmol H2/g cellulose and MY 10.4 mmol CH4/g cellulose). The maximum hydrogen production rate of 26.0 mmol H2/L/d and methane production rate of 23.2 mmol CH4/L/d were obtained for the seed activated sludge that was thermally treated at 70 degrees C for 50 min and 60 degrees C for 40 min, respectively.
Collapse
Affiliation(s)
- C H Lay
- Department of Environmental Engineering and Science, Feng Chia University, Taichung, Chinese Taiwan.
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Huang HH, Pesavento JB, Rozovsky S, Downing KH, Groves JT. A Platform to Study Curvature Effects of Proteins on Membranes. Biophys J 2010. [DOI: 10.1016/j.bpj.2009.12.3674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|
31
|
Triffo SB, Huang HH, Smith AW, Groves JT. Membrane Anchor Dependent Colocalization in Cellular Membranes Observed by Fluorescence Cross-Correlation Spectroscopy. Biophys J 2010. [DOI: 10.1016/j.bpj.2009.12.1657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
32
|
Wang H, Huang HH, Ding J, Wang YH. Embryotoxicity and teratogenicity of pesticide indoxacarb to sea urchin (Strongylocentrotus intermedius). Water Sci Technol 2010; 61:2733-9. [PMID: 20489245 DOI: 10.2166/wst.2010.053] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Sperm cell and embryo toxicity tests using the sea urchin Strongylocentrotus intermedius (S. intermedius) were performed to assess the toxicity of indoxacarb, a new widely used insecticide. New toxicity data for indoxacarb expressed as median effective concentration (EC(50)) were reported for the sea urchin species. When sperms and cells were exposed to the pesticide before fertilization, no significant inhibition in the fertilization success of S. intermedius (up to 40 mg/L) was observed. Developmental toxicity of the pesticide displayed a significant dose-related increase of larval malformations and differentiation arrest at concentrations of 0.1 mg/L to 40.0 mg/L at each cleavage, including the 2-cell stage, 4-cell, blastula, gastrula, prism and 4-arm pluteus stages. It seems that 4-arm pluteus is the most sensitive to indoxacarb with the EC(50) of 3.73 mg/L, two times less than that of the first cleavage stage. All these results indicate that more attentions should be paid to the potential marine pollutions caused by this pesticide indoxacarb.
Collapse
Affiliation(s)
- H Wang
- College of Life Science, Northwest A & F University, Yangling Shaanxi 712100, China
| | | | | | | |
Collapse
|
33
|
Chuang MS, Huang HH, Dixon KM, Chen KS, Mao CL, Chen CL. Detection of urine and blood clenbuterol following short-term oral administration in the horse. Immunopharmacol Immunotoxicol 2009; 32:171-6. [PMID: 19821644 DOI: 10.3109/08923970903179688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND AND AIM The pharmacokinetics of clenbuterol in equine urine and blood was investigated. MATERIAL AND METHODS Urine and blood samples were collected following 3-day multiple oral administrations. The samples were examined using enzyme-linked immunosorbent assay and further confirmed by solid phase extraction and capillary electrophoresis. RESULTS Urinary clenbuterol was detectable until day 14 after the last dose. The urinary excretion of clenbuterol was characterized by a biphasic pattern. The half-lives of the bi-exponential elimination (t(1/2alpha) and t(1/2beta)) for urinary clenbuterol were about 12.1 and 48 hours. After a single oral administration (4 microg/kg) of clenbuterol, the half-life of serum clenbuterol was approximately 11.4 hours.
Collapse
Affiliation(s)
- M S Chuang
- Department of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
| | | | | | | | | | | |
Collapse
|
34
|
Abstract
Central (hypothalamic) control of bone mass is proposed to be mediated through beta2-adrenergic receptors (beta2-ARs). While investigations in mouse bone cells suggest that epinephrine enhances both RANKL and OPG mRNA via both beta-ARs and alpha-ARs, whether alpha-ARs are expressed in human bone cells is controversial. The current study investigated the expression of alpha1-AR and beta2-AR mRNA and protein and the functional role of adrenergic stimulation in human osteoblasts (HOBs). Expression of alpha1B- and beta2-ARs was examined by RT-PCR, immunofluorescence microscopy and Western blot (for alpha1B-ARs). Proliferation in HOBs was assessed by (3)H-thymidine incorporation and expression of RANKL and OPG was determined by quantitative RT-PCR. RNA message for alpha1B- and beta2-ARs was expressed in HOBs and MG63 human osteosarcoma cells. alpha1B- and beta2-AR immunofluorescent localization in HOBs was shown for the first time by deconvolution microscopy. alpha1B-AR protein was identified in HOBs by Western blot. Both alpha1-agonists and propranolol (beta-blocker) increased HOB replication but fenoterol, a beta2-agonist, inhibited it. Fenoterol nearly doubled RANKL mRNA and this was inhibited by propranolol. The alpha1-agonist cirazoline increased OPG mRNA and this increase was abolished by siRNA knockdown of alpha1B-ARs in HOBs. These data indicate that both alpha1-ARs and beta2-ARs are present and functional in HOBs. In addition to beta2-ARs, alpha1-ARs in human bone cells may play a role in modulation of bone turnover by the sympathetic nervous system.
Collapse
Affiliation(s)
- H H Huang
- Department of Physiology, School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
| | | | | | | |
Collapse
|
35
|
Abstract
To investigate the biotransformation of pantoprazole, a proton-pump inhibitor, by filamentous fungus and further to compare the similarities between microbial transformation and mammalian metabolism of pantoprazole, four strains of Cunninghamella (C. blakesleeana AS 3.153, C. echinulata AS 3.2004, C. elegans AS 3.156, and AS 3.2028) were screened for the ability to catalyze the biotransformation of pantoprazole. Pantoprazole was partially metabolized by four strains of Cunninghamella, and C. blakesleeana AS 3.153 was selected for further investigation. Three metabolites produced by C. blakesleeana AS 3.153 were isolated using semi-preparative HPLC, and their structures were identified by a combination analysis of LC/MS(n) and NMR spectra. Two further metabolites were confirmed with the aid of synthetic reference compounds. The structure of a glucoside was tentatively assigned by its chromatographic behavior and mass spectroscopic data. These six metabolites were separated and quantitatively assayed by liquid chromatography-ion trap mass spectrometry. After 96h of incubation with C. blakesleeana AS 3.153, approximately 92.5% of pantoprazole was metabolized to six metabolites: pantoprazole sulfone (M1, 1.7%), pantoprazole thioether (M2, 12.4%), 6-hydroxy-pantoprazole thioether (M3, 1.3%), 4'-O-demethyl-pantoprazole thioether (M4, 48.1%), pantoprazole thioether-1-N-beta-glucoside (M5, 20.6%), and a glucoside conjugate of pantoprazole thioether (M6, 8.4%). Among them, M5 and M6 are novel metabolites. Four phase I metabolites of pantoprazole produced by C. blakesleeana were essentially similar to those obtained in mammals. C. blakesleeana could be a useful tool for generating the mammalian phase I metabolites of pantoprazole.
Collapse
Affiliation(s)
- Z Y Xie
- Laboratory of Drug Metabolism and Pharmacokinetics, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang 110016, PR China
| | | | | |
Collapse
|
36
|
Ainavarapu SRK, Wiita AP, Huang HH, Fernandez JM. A Single-Molecule Assay to Directly Identify Solvent-Accessible Disulfide Bonds and Probe Their Effect on Protein Folding. J Am Chem Soc 2007; 130:436-7. [DOI: 10.1021/ja077851s] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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)
| | - Arun P. Wiita
- Department of Biological Sciences, Columbia University, New York, New York 10027
| | - Hector H. Huang
- Department of Biological Sciences, Columbia University, New York, New York 10027
| | - Julio M. Fernandez
- Department of Biological Sciences, Columbia University, New York, New York 10027
| |
Collapse
|
37
|
Lin PL, Huang HH, Fan SZ, Tsai MC, Lin CH, Huang CH. Effect of ropivacaine on endothelium-dependent phenylephrine-induced contraction in guinea pig aorta. Acta Anaesthesiol Scand 2007; 51:1388-93. [PMID: 17944643 DOI: 10.1111/j.1399-6576.2007.01443.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Previous studies have shown that ropivacaine has biphasic vascular effects, causing vasoconstriction at low concentrations and vasorelaxation at high concentrations. This study was designed to examine the role of the endothelium during accidental intravascular absorption of ropivacaine, and to elucidate the mechanisms responsible. METHODS Isolated guinea pig aortic rings were suspended for isometric tension recording. The effects of ropivacaine on endothelium-intact and endothelium-denuded aortic rings were assessed. Endothelium-intact aortic rings were pre-contracted with phenylephrine before being exposed to ropivacaine and acetylcholine, in order to generate and compare concentration-response curves. In the absence and presence of yohimbine, propranolol, atropine, indometacin, N(G)-nitro-l-arginine methyl ester (l-NAME), 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ) or methylene blue, the contractile response induced by ropivacaine was assessed on endothelium-intact aortic rings pre-contracted with phenylephrine. RESULTS Ropivacaine (3 x 10(-4) to 10(-2) mol/l) produced vasoconstriction in endothelium-denuded aortic rings, whereas no such response was observed in aortic rings with intact endothelium. In phenylephrine pre-contracted intact aortic rings, ropivacaine induced a greater degree of vasorelaxation than did acetylcholine. Yohimbine, propranolol and atropine all failed to affect the relaxation responses induced by ropivacaine. However, pre-treatment with indometacin (cyclo-oxygenase inhibitor), l-NAME (nitric oxide synthase inhibitor), methylene blue (soluble guanylyl cyclase inhibitor) or ODQ (soluble guanylyl cyclase inhibitor), significantly decreased the ropivacaine-induced relaxation of endothelium-intact aortic rings (3 x 10(-4) to 10(-2) mol/l). CONCLUSIONS Ropivacaine elicits an endothelium-dependent vasorelaxation in phenylephrine pre-contracted aortic rings via the nitric oxide-cyclic guanosine 3',5'-monophosphate pathway and the prostaglandin system.
Collapse
Affiliation(s)
- P L Lin
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | | | | | | | | | | |
Collapse
|
38
|
Abstract
The phase II metabolite of acetaminophen in filamentous fungi and actinomycetes separated from soil was investigated. Fifty-four filamentous fungi and twenty-seven actinomycetes were screened to transform acetaminophen. The metabolites of acetaminophen were assayed using liquid chromatography-tandem mass spectrometry. The only metabolite was subject to enzymatic hydrolysis to confirm its structure. Acetaminophen was converted into glucoside conjugate, by filamentous fungi JX1-60, LN17-2, LN20-1 and the yield of the conjugate was 60.01%, 44.27%, 100%, respectively, and no phase I metabolites were detected. Glucoside conjugation of acetaminophen in filamentous fungi differs from the phase II metabolism of glucuronidation in humans. The fungus LN20-1 could be a suitable model to synthesize glucoside conjugate of acetaminophen.
Collapse
Affiliation(s)
- H H Huang
- Shanghai Drug-Metab Biotech Co., Ltd, People's Republic of China
| | | | | | | | | |
Collapse
|
39
|
Chen B, Doucleff M, Wemmer DE, De Carlo S, Huang HH, Nogales E, Hoover TR, Kondrashkina E, Guo L, Nixon BT. ATP ground- and transition states of bacterial enhancer binding AAA+ ATPases support complex formation with their target protein, sigma54. Structure 2007; 15:429-40. [PMID: 17437715 PMCID: PMC2680074 DOI: 10.1016/j.str.2007.02.007] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [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: 10/03/2006] [Revised: 11/01/2006] [Accepted: 02/22/2007] [Indexed: 11/28/2022]
Abstract
Transcription initiation by the sigma54 form of bacterial RNA polymerase requires hydrolysis of ATP by an enhancer binding protein (EBP). We present SAS-based solution structures of the ATPase domain of the EBP NtrC1 from Aquifex aeolicus in different nucleotide states. Structures of apo protein and that bound to AMPPNP or ADP-BeF(x) (ground-state mimics), ADP-AlF(x) (a transition-state mimic), or ADP (product) show substantial changes in the position of the GAFTGA loops that contact polymerase, particularly upon conversion from the apo state to the ADP-BeF(x) state, and from the ADP-AlF(x) state to the ADP state. Binding of the ATP analogs stabilizes the oligomeric form of the ATPase and its binding to sigma54, with ADP-AlF(x) having the largest effect. These data indicate that ATP binding promotes a conformational change that stabilizes complexes between EBPs and sigma54, while subsequent hydrolysis and phosphate release drive the conformational change needed to open the polymerase/promoter complex.
Collapse
Affiliation(s)
- Baoyu Chen
- Integrative Biosciences Graduate Degree Program – Chemical Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Michaeleen Doucleff
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - David E. Wemmer
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Sacha De Carlo
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California at Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Hector H. Huang
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California at Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Eva Nogales
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California at Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Timothy R. Hoover
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA
| | - Elena Kondrashkina
- BioCAT at APS/Argonne National Lab, Illinois Institute of Technology, 9700 S. Cass Ave, Argonne, IL 60439, USA
| | - Liang Guo
- BioCAT at APS/Argonne National Lab, Illinois Institute of Technology, 9700 S. Cass Ave, Argonne, IL 60439, USA
| | - B. Tracy Nixon
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA
| |
Collapse
|
40
|
Yen YH, Lin TF, Huang HH, Chan WH, Yeh HM, Lau HP. Apnoea and consciousness disturbance following inadvertent inthrathecal injection of autologous blood during epidural labor analgesia. Anaesth Intensive Care 2006; 34:827-8. [PMID: 17183909] [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: 05/13/2023]
|
41
|
Ainavarapu SRK, Brujic J, Huang HH, Wiita AP, Lu H, Li L, Walther KA, Carrion-Vazquez M, Li H, Fernandez JM. Contour length and refolding rate of a small protein controlled by engineered disulfide bonds. Biophys J 2006; 92:225-33. [PMID: 17028145 PMCID: PMC1697845 DOI: 10.1529/biophysj.106.091561] [Citation(s) in RCA: 227] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The introduction of disulfide bonds into proteins creates additional mechanical barriers and limits the unfolded contour length (i.e., the maximal extension) measured by single-molecule force spectroscopy. Here, we engineer single disulfide bonds into four different locations of the human cardiac titin module (I27) to control the contour length while keeping the distance to the transition state unchanged. This enables the study of several biologically important parameters. First, we are able to precisely determine the end-to-end length of the transition state before unfolding (53 Angstrom), which is longer than the end-to-end length of the protein obtained from NMR spectroscopy (43 Angstrom). Second, the measured contour length per amino acid from five different methods (4.0 +/- 0.2 Angstrom) is longer than the end-to-end length obtained from the crystal structure (3.6 Angstrom). Our measurement of the contour length takes into account all the internal degrees of freedom of the polypeptide chain, whereas crystallography measures the end-to-end length within the "frozen" protein structure. Furthermore, the control of contour length and therefore the number of amino acids unraveled before reaching the disulfide bond (n) facilitates the test of the chain length dependence on the folding time (tau(F)). We find that both a power law scaling tau(F) lambda n(lambda) with lambda = 4.4, and an exponential scaling with n(0.6) fit the data range, in support of different protein-folding scenarios.
Collapse
|
42
|
Huang HH, Zhang YY, Xiu QY, Zhou X, Huang SG, Lu Q, Wang DM, Wang F. Community-acquired pneumonia in Shanghai, China: microbial etiology and implications for empirical therapy in a prospective study of 389 patients. Eur J Clin Microbiol Infect Dis 2006; 25:369-74. [PMID: 16767484 DOI: 10.1007/s10096-006-0146-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [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: 10/24/2022]
Abstract
The aim of this multicenter study was to identify the causative pathogens of community-acquired pneumonia (CAP) in Shanghai, China, and to determine their susceptibility to antimicrobial agents. Pathogens obtained from 389 patients with documented CAP during 2001-2003 were identified by multiple diagnostic tools that included bacterial culture, polymerase chain reaction (PCR), and specific immunological assays. Susceptibility of the bacterial isolates was tested by the broth microdilution method. A specific pathogen was identified in 39.8% (155/389) of the patients: Haemophilus influenzae (n=80), Klebsiella spp. (n=15), Streptococcus pneumoniae (n=12), Staphylococcus aureus (n=6), Moraxella catarrhalis (n=1), other gram-negative organisms (n=9), and atypical pathogens that comprised Mycoplasma pneumoniae (n=42), Chlamydia pneumoniae (n=17), and Legionella pneumophila (n=2). Most H. influenzae isolates were susceptible to ampicillin (88.3%), and all were susceptible to macrolides. Of the S. pneumoniae isolates, 75% (9/12) were susceptible to penicillin, while 25% (3/12) were intermediately susceptible. H. influenzae and atypical pathogens are among the most important pathogens of CAP. Ampicillin, cephalosporins, and the newer fluoroquinolones can be used as empirical therapy for CAP in the Shanghai area. The efficacy of monotherapy with newer macrolides for CAP caused by S. pneumoniae requires further evaluation.
Collapse
Affiliation(s)
- H H Huang
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China.
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Wiita AP, Ainavarapu SRK, Huang HH, Fernandez JM. Force-dependent chemical kinetics of disulfide bond reduction observed with single-molecule techniques. Proc Natl Acad Sci U S A 2006; 103:7222-7. [PMID: 16645035 PMCID: PMC1464324 DOI: 10.1073/pnas.0511035103] [Citation(s) in RCA: 281] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The mechanism by which mechanical force regulates the kinetics of a chemical reaction is unknown. Here, we use single-molecule force-clamp spectroscopy and protein engineering to study the effect of force on the kinetics of thiol/disulfide exchange. Reduction of disulfide bonds through the thiol/disulfide exchange chemical reaction is crucial in regulating protein function and is known to occur in mechanically stressed proteins. We apply a constant stretching force to single engineered disulfide bonds and measure their rate of reduction by DTT. Although the reduction rate is linearly dependent on the concentration of DTT, it is exponentially dependent on the applied force, increasing 10-fold over a 300-pN range. This result predicts that the disulfide bond lengthens by 0.34 A at the transition state of the thiol/disulfide exchange reaction. Our work at the single bond level directly demonstrates that thiol/disulfide exchange in proteins is a force-dependent chemical reaction. Our findings suggest that mechanical force plays a role in disulfide reduction in vivo, a property that has never been explored by traditional biochemistry. Furthermore, our work also indicates that the kinetics of any chemical reaction that results in bond lengthening will be force-dependent.
Collapse
Affiliation(s)
- Arun P. Wiita
- *Department of Biological Sciences and
- Graduate Program in Neurobiology and Behavior, Columbia University, New York, NY 10027
| | | | | | - Julio M. Fernandez
- *Department of Biological Sciences and
- To whom correspondence should be addressed at:
Department of Biological Sciences, Columbia University, 1011 Fairchild Center, 1212 Amsterdam Avenue, MC 2449, New York, NY 10027. E-mail:
| |
Collapse
|
44
|
Kwong KYC, Literat A, Zhu NL, Huang HH, Li C, Jones CA, Minoo P. Expression of transforming growth factor beta (TGF-beta1) in human epithelial alveolar cells: a pro-inflammatory mediator independent pathway. Life Sci 2004; 74:2941-57. [PMID: 15051419 DOI: 10.1016/j.lfs.2003.08.048] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2003] [Accepted: 08/25/2003] [Indexed: 10/26/2022]
Abstract
Regulation of transforming growth factor beta 1 (TGF-beta1) expression remains unclear. Inflammation has been inferred to play a major role in stimulating TGF-beta1 production since high concentrations of TGF-beta1 have been found in the lungs of patients with various diffuse inflammatory lung diseases. To establish an association between inflammation and TGF-beta1 expression, human alveolar epithelial (A549) cells were co-cultured with lipopolysaccharide (LPS), Tumor necrosis factor alpha (TNFalpha), Interleukin 1 beta (IL-1beta) and Interleukin 8 (IL-8) for 12 hours. Total and bioactive TGF-beta1 protein were then measured. A549 cells transiently transfected with a plasmid containing the TGF-beta1 promoter linked to a luciferase reported gene were then co-cultured with the same inflammatory peptides for 12 hours and TGF-beta1 promoter activity determined. Nuclear transcription factors AP-1 (c-jun) or NF-kappa (p65, p50 and p105) were over expressed in A549 cells transiently transfected with the TGF-beta1 promoter and TGF-beta1 promoter activity subsequently measured. Stimulation with inflammatory signals LPS, TNFalpha, IL-1beta, IL-8 resulted in no increase of total or bioactive TGF-beta1 activity above constitutive concentrations in vitro. TGF-beta1 promoter activity was also unchanged from baseline levels in response to the same inflammatory peptides. Expression of c-jun however led to significant increases of TGF-beta1 promoter activity over constitutive levels. In contrast p65 and p105 expression resulted in inhibition of TGF-beta1 promoter activity below baseline levels. We conclude that in a human alveolar epithelial cell line, inflammation does not regulate TGF-beta1 expression. These studies suggest that in lung pathologies such as asthma, lung fibrosis and CLD, TGF-beta1 production may involve pathways independent of inflammatory mediators LPS, TNFalpha, IL-1beta and IL-8.
Collapse
Affiliation(s)
- K Y C Kwong
- Division of Allergy-Immunology, Department of Pediatrics, LAC+USC Medical Center, Room 1G1 General Labs Building, 1801 E Marengo St, Los Angeles, CA 90033, USA.
| | | | | | | | | | | | | |
Collapse
|
45
|
Karpowich NK, Huang HH, Smith PC, Hunt JF. Crystal structures of the BtuF periplasmic-binding protein for vitamin B12 suggest a functionally important reduction in protein mobility upon ligand binding. J Biol Chem 2003; 278:8429-34. [PMID: 12468528 DOI: 10.1074/jbc.m212239200] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BtuF is the periplasmic binding protein (PBP) for the vitamin B12 transporter BtuCD, a member of the ATP-binding cassette (ABC) transporter superfamily of transmembrane pumps. We have determined crystal structures of Escherichia coli BtuF in the apo state at 3.0 A resolution and with vitamin B12 bound at 2.0 A resolution. The structure of BtuF is similar to that of the FhuD and TroA PBPs and is composed of two alpha/beta domains linked by a rigid alpha-helix. B12 is bound in the "base-on" or vitamin conformation in a wide acidic cleft located between these domains. The C-terminal domain shares structural homology to a B12-binding domain found in a variety of enzymes. The same surface of this domain interacts with opposite surfaces of B12 when comparing ligand-bound structures of BtuF and the homologous enzymes, a change that is probably caused by the obstruction of the face that typically interacts with this domain by the base-on conformation of vitamin B12 bound to BtuF. There is no apparent pseudo-symmetry in the surface properties of the BtuF domains flanking its B12 binding site even though the presumed transport site in the previously reported crystal structure of BtuCD is located in an intersubunit interface with 2-fold symmetry. Unwinding of an alpha-helix in the C-terminal domain of BtuF appears to be part of conformational change involving a general increase in the mobility of this domain in the apo structure compared with the B12-bound structure. As this helix is located on the surface likely to interact with BtuC, unwinding of the helix upon binding to BtuC could play a role in triggering release of B12 into the transport cavity. Furthermore, the high mobility of this domain in free BtuF could provide an entropic driving force for the subsequent release of BtuF required to complete the transport cycle.
Collapse
Affiliation(s)
- Nathan K Karpowich
- Department of Biological Sciences, Columbia University, New York, New York 10027, USA
| | | | | | | |
Collapse
|
46
|
Abstract
The presence of HLA-B27 in patients affected with ankylosing spondylitis (AS) was well established prior to the advent of DNA typing of various genes within the major histocompatibility complex (MHC) in humans. However, molecular typing of the MHC genes revealed that B27 comprises a motley assortment of alleles, some of which are strongly positively associated with the disease and some of which are negatively associated with the disease. B*2706 was reported to have a negative association with AS in the Thai population and in Chinese Singaporeans. We report here our finding of an absence of B*2706 in 184 Taiwanese AS patients.
Collapse
Affiliation(s)
- I-H Chen
- Tzu Chi Medical Center, Buddhist Compassion Relief Tzu Chi Foundation, Hualien, Taiwan
| | | | | | | | | | | |
Collapse
|
47
|
Abstract
The spectral characteristics of heart rate variability (HRV) are related to the modulation of the autonomic nervous system. As the physiological condition is changed by such external stimuli such as drugs, postural changes, and anesthesia, or by internal deregulation such as in syncope, adjective autonomic responses could alter HRV characteristics. Time-frequency analysis is commonly used to investigate the time-related HRV characteristics. An alteration of the autonomic regulation resulting in a change in mean heart rate induces a transient component in heart rate, which, with any analysis method based on signals from multiple beats, results in the apparent spread of the spectrum of frequencies. This obscures the spectral components related to the autonomic function. In this paper we investigated the influence of the transient component in several time-frequency methods including the short-time Fourier transform, the Choi-Williams distribution, the smoothed pseudo Wigner-Ville distribution (SPWVD), the filtering SPWVD compensation, and the discrete wavelet transform. One simulated signal and two heart rate signals during general anesthesia and postural change were used for this assessment. The result demonstrates that the filtering SPWVD compensation and the discrete wavelet transform have small spectrum interference from the transient component.
Collapse
Affiliation(s)
- H L Chan
- Department of Electrical Engineering, Chang-Gung University, Kwei-Shan, Tao-Yuan, Taiwan,.
| | | | | |
Collapse
|
48
|
Abstract
BACKGROUND Febrile ulceronecrotic Mucha-Habermann's disease (FUMHD) is a severe and very rare variant of pityriasis lichenoides et varilioformis acuta, which is characterized by large coalescing, and ulceronecrotic maculopapules or plaques. Morphological changes of the skin accompanied by persistent high fever and several constitutional symptoms have suggested virus infection in patients with FUMHD. However, the available information of viral origin is limited. In this study we investigated the relationship of cytomegalovirus (CMV), Epstein-Barr virus (EBV), human herpesvirus 8 (HHV8), type I human T-cell lymphotropic virus (HTLV-I), and parvovirus B19 (PVB19) with FUMHD in a Taiwanese patient. METHODS The existence of CMV, EBV, HHV8, HTLV-I, and PVB19 was determined by polymerase chain reaction (PCR). The presence of CMV in the endothelial cells was characterized by in situ hybridization (ISH) and immunohistochemistry (IHC). RESULTS Serologic immunoglobulin to CMV and IHC identification of CMV late gene in the biopsy specimen indicated that the patient was infected with CMV. Detection of CMV was confirmed by PCR and ISH. CONCLUSIONS These results indicate that FUMHD is associated with dermal CMV manifestation. Nonetheless, the induction mechanism of FUMHD with CMV infection has yet to be determined.
Collapse
Affiliation(s)
- K S Tsai
- Departments of Dermatology, Medical Research and Pathology, China Medical College Hospital and China Medical College, Taichung, Taiwan
| | | | | | | | | | | |
Collapse
|
49
|
Kao WF, Kuo CC, Chang H, Chen WL, Wei CH, Huang HH, Yen DH, Wu JK, Miao S, Lee CH. Characteristics of patients at a Taipei summer rock concert festival. Zhonghua Yi Xue Za Zhi (Taipei) 2001; 64:525-30. [PMID: 11768283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
BACKGROUND Rock concerts are popular mass gatherings in Taiwan. Millions of fans participate in rock concerts in Taiwan each year. However, there were no reports on the characteristics of the patients seen in rock concerts in Taiwan. METHODS Medical care for a summer rock concert festival held in an outdoor stadium in Taipei was coordinated by emergency physicians of a medical center. About 50,000 attendees participated in the two-night concert. Three stations were set up to provide advanced medical care. A standardized form was used to collect information about patients. RESULTS A total of 28 cases visited the medical stations, fourteen cases each day. They were aged from 13 to 40 years, with an average of 20.8 +/- 6.4. Twenty-one cases were female and seven were male. Twenty-two (79%) were spectators, five (18%) were on-duty staff, and one was a by-stander. Based on an estimation of totally 50,000 participants in the stadium for this two-night festival, the medical use rate was roughly 5.6 PPTT (patients per ten thousand attendees). The most common major problem was fainting which accounted for 13 cases (46%). Of these 13 cases, three cases (23%) lost consciousness and 12 cases (92%) were female. Sixteen cases (57%) were classified as requiring ALS (advanced life support) and 12 cases (43%) as requiring BLS (basic life support). Most cases improved and were discharged after onsite treatment. Only one case was transferred by ambulance due to persistent chest pain. However, she recovered several hours later. CONCLUSIONS By this preliminary data, first reported in Taiwan, we found that the most common problem was fainting. More than half of the cases seen at the concert required advanced life support. A well-designed emergency medical service (EMS) system is mandatory to provide services for these events.
Collapse
Affiliation(s)
- W F Kao
- Department of Emergency Medicine, Taipei Veterans General Hospital, Taiwan, ROC.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Lin PL, Wang YP, Chou YM, Chan HL, Huang HH. Lack of intravenous lidocaine effects on HRV changes of tracheal intubation during induction of general anesthesia. Acta Anaesthesiol Sin 2001; 39:77-82. [PMID: 11475179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
BACKGROUND Intravenous lidocaine has been widely used for suppressing the autonomic activation from tracheal intubation during induction of general anesthesia. Conventionally, researches of its effectiveness through assessment of heart rate and blood pressure changes obtained by common clinical methods result in the conclusions deduced of much controversy. Heart rate variability is a noninvasive measurement of autonomic regulation and is suitable for the study of this subject. METHODS 36 ASA class I-II patients undergoing general anesthesia were divided into 3 groups. Besides induction agents, intravenous lidocaine was given 5 min before tracheal intubation in group A, 3 min before intubation in group B and nothing in group C. HRV spectral powers were measured at awake state, anesthetized state before tracheal intubation and anesthetized state after tracheal intubation by time frequency spectral analysis method and comparison was made between the three groups. RESULTS The HRV spectral power in high frequency (HF) and mid-frequency (MF) power bands and their ratios (MF/HF) were not significantly different among the 3 groups during the 3 observation periods. CONCLUSIONS There was no evidence to indicate the effectiveness of intravenous lidocaine on the autonomic regulation during tracheal intubation under the influence of induction agents used in general anesthesia.
Collapse
Affiliation(s)
- P L Lin
- Department of Anesthesiology, National Taiwan University Hospital, 7 Chung-Shan S. Rd., Taipei, Taiwan
| | | | | | | | | |
Collapse
|