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Lin T, Peng S, Lu S, Fu S, Zeng D, Li J, Chen T, Fan T, Lang C, Feng S, Ma J, Zhao C, Antony B, Cicuttini F, Quan X, Zhu Z, Ding C. Prediction of knee pain improvement over two years for knee osteoarthritis using a dynamic nomogram based on MRI-derived radiomics: a proof-of-concept study. Osteoarthritis Cartilage 2023; 31:267-278. [PMID: 36334697 DOI: 10.1016/j.joca.2022.10.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 09/26/2022] [Accepted: 10/19/2022] [Indexed: 11/05/2022]
Abstract
OBJECTIVES To develop and validate a nomogram to detect improved knee pain in osteoarthritis (OA) by integrating magnetic resonance imaging (MRI) radiomics signature of subchondral bone and clinical characteristics. METHODS Participants were selected from the Vitamin D Effects on Osteoarthritis (VIDEO) study. The primary outcome was 20% improvement of knee pain score over 2 years in participants administrated either vitamin D or placebo. Radiomics features of subchondral bone and clinical characteristics from 216 participants were extracted and analyzed. The participants were randomly split into the training and validation cohorts at a ratio of 8:2. Least absolute shrinkage and selection operator (LASSO) regression was used to select features and generate radiomics signatures. The optimal radiomics signature and clinical indicators were fitted into a nomogram using multivariable logistic regression model. RESULTS The nomogram showed favorable discrimination performance [AUCtraining, 0.79 (95% CI: 0.72-0.79), AUCvalidation, 0.83 (95% CI: 0.70-0.96)] as well as a good calibration. Additional contributing value of fusion radiomics signature to the nomogram was statistically significant (NRI, 0.23; IDI, 0.14, P < 0.001 in training cohort and NRI, 0.29; IDI, 0.18, P < 0.05 in validating cohort). Decision curve analysis confirmed the clinical usefulness of nomogram. CONCLUSION The radiomics-based nomogram comprising the MR radiomics signature and clinical variables achieves a favorable predictive efficacy and accuracy in differentiating improvement in knee pain among OA patients. This proof-of-concept study provides a promising way to predict clinically meaningful outcomes.
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Affiliation(s)
- T Lin
- Department of Radiology, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - S Peng
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
| | - S Lu
- Department of Radiology, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - S Fu
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
| | - D Zeng
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
| | - J Li
- Division of Orthopaedic Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - T Chen
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - T Fan
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - C Lang
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - S Feng
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, 999077, Hong Kong, China.
| | - J Ma
- School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.
| | - C Zhao
- Philips China, Beijing, 100000, China.
| | - B Antony
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, 7000, Australia.
| | - F Cicuttini
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, 3800, Australia.
| | - X Quan
- Department of Radiology, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - Z Zhu
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China.
| | - C Ding
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, 510282, China; Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, 7000, Australia.
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Wang X, Chen T, Liang W, Fan T, Zhu Z, Cao P, Ruan G, Zhang Y, Chen S, Wang Q, Li S, Huang Y, Zeng M, Hunter DJ, Li J, Ding C. Synovitis mediates the association between bone marrow lesions and knee pain in osteoarthritis: data from the Foundation for the National Institute of Health (FNIH) Osteoarthritis Biomarkers Consortium. Osteoarthritis Cartilage 2022; 30:1270-1277. [PMID: 35750239 DOI: 10.1016/j.joca.2022.06.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 05/16/2022] [Accepted: 06/13/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Although subchondral bone marrow lesions (BMLs) and synovitis have been well acknowledged as important sources of pain in knee osteoarthritis (KOA), it is unclear if synovitis plays the mediating role in the relationship between BMLs and knee pain. METHODS We analyzed 600 subjects with magnetic resonance imaging (MRI) in the Foundation for National Institutes of Health Osteoarthritis Biomarkers Consortium (FNIH) cohort at baseline and 24-month. BMLs and synovitis were measured according to the MRI Osteoarthritis Knee Score (MOAKS) scoring system. BMLs were scored in five subregions. A summary synovitis score of effusion and Hoffa-synovitis was calculated. Knee pain was evaluated using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). Linear regression models were applied to analyze the natural direct effect (NDE) of BMLs and synovitis with knee pain, respectively, and natural indirect effect (NIE) mediated by synovitis. RESULTS 590 participants (58.8% females, with a mean age of 61.5) were included in the present analyses. For NDE, knee pain was cross-sectionally associated with medial femorotibial BMLs (β = 0.23, 95% CI: 0.09, 0.38) and synovitis (β = 0.40, 95% CI: 0.20, 0.60). Longitudinal associations retained significant [medial femorotibial BMLs (β = 0.37, 95% CI: 0.21, 0.53); synovitis (β = 0.72, 95% CI: 0.45, 0.99)]. In the NIE analyses, synovitis mediated the association between medial femorotibial BML and knee pain at baseline (β = 0.051, 95% CI: 0.01, 0.09) and over 24 months (β = 0.079, 95% CI: 0.023, 0.15), with the mediating proportion of 17.8% and 22.4%, respectively. CONCLUSION Synovitis partially mediates the association between medial femorotibial BMLs and knee pain.
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Affiliation(s)
- X Wang
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Orthopedics, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - T Chen
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong, China.
| | - W Liang
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China.
| | - T Fan
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - Z Zhu
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - P Cao
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - G Ruan
- Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China.
| | - Y Zhang
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - S Chen
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - Q Wang
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - S Li
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - Y Huang
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, China.
| | - M Zeng
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - D J Hunter
- Department of Rheumatology, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Australia.
| | - J Li
- Division of Orthopaedic Surgery, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - C Ding
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia.
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Zhao J, Tian M, Li Y, Su W, Fan T. Construction of tissue-engineered human corneal endothelium for corneal endothelial regeneration using a crosslinked amniotic membrane scaffold. Acta Biomater 2022; 147:185-197. [PMID: 35358736 DOI: 10.1016/j.actbio.2022.03.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 03/18/2022] [Accepted: 03/23/2022] [Indexed: 11/01/2022]
Abstract
Descemet's membrane endothelial keratoplasty (DMEK) may provide fast visual rehabilitation in the therapy of corneal endothelial disorders. However, due to shortage of donated corneas, how to construct a corneal endothelial substitute with powerful functions that can be used for DMEK is still unsolved. Herein, we introduced the method of corneal crosslinking (CXL) and conjugated the components of native Descemet's membrane (DM) to improve the mechanical properties and the biocompatibility of denuded amniotic membrane (dAM), further assessed their effects on cell adhesion, proliferation, YAP translocation, and metabolic activity in human corneal endothelial (HCE) cells. Using modified crosslinked dAM (mcdAM) and non-transfected HCE cells, we constructed a tissue-engineered HCE (TE-HCE) and evaluated its functions in cat and monkey models as well. Our results showed that the mechanical properties of mcdAM were improved effectively by CXL, and the adhesion, proliferation, and YAP translocation of HCE cells were dose-dependently improved after ECM modification. The combination of 0.01 mg/mL laminin with 0.1 mg/mL fibronectin showed the highest efficacy. Then, the TE-HCE was constructed in vitro, with a high density of 3612 ± 243 cells/mm2. Results of DMEK in animal models showed that corneal transparency was maintained, accompanied with normal morphology and histological structure of the regenerated corneal endothelium. Therefore, CXL combined with DM-mimic-coating methods could effectively improve the mechanical properties of dAM and enhance the biocompatibility with HCE cells. The constructed TE-HCE had normal histological structure and functioned well in animal models via DMEK, which could be used as a promising powerful equivalent of HCE. STATEMENT OF SIGNIFICANCE: Using high-quality corneal endothelium and an appropriate endothelial keratoplasty is the most effective way for the treatment of corneal endotheliopathy. Descemet's membrane endothelial keratoplasty (DMEK) which can provide better visual acuity, lower immunological rejection rates, and improved graft survival is an ideal surgery at present. However, due to the shortage of donated corneas, it is urgent to find an equivalent substitute of corneal endothelial donor which is suitable for the DMEK surgery to solve the problem of corneal endothelial regeneration. Herein, we introduced the clinical cornea-crosslinking and Descemet's membrane-mimic-coating methods to build the modified crosslinked denuded amniotic membrane scaffold and further constructed a high-quality corneal endothelial functional substitute that can be used in DMEK surgery.
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Affiliation(s)
- Jun Zhao
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Meng Tian
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Yun Li
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Wen Su
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China; Present address: Department of traditional Chinese Medicine and Immunizations, Institute of Chinese Medicine and Pharmacy, Shandong University of traditional Chinese Medicine, Jinan 250355, Shandong Province, China
| | - Tingjun Fan
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China.
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Zhang Y, Hu Z, Qu J, Xie H, Zhao J, Fan T, Liu X, Zhang M. Tissue-Engineered Corneal Endothelial Sheets Using Ultrathin Acellular Porcine Corneal Stroma Substrates for Endothelial Keratoplasty. ACS Biomater Sci Eng 2022; 8:1301-1311. [PMID: 35229601 DOI: 10.1021/acsbiomaterials.2c00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tissue-engineered cornea endothelial sheets (TECES), created using a biocompatible thin and transparent carrier with corneal endothelial cells, could alleviate the shortage of donor corneas and provide abundant functional endothelial cells. In our previous clinical trials, the effectiveness and safety of the acellular porcine corneal stroma (APCS) applied in lamellar keratoplasty have been confirmed. In this study, we optimized the method to cut APCS into multiple 20 μm ultrathin lamellae by a cryostat microtome and investigated the feasibility of TECES by seeding rabbit corneal endothelial cells (RCECs) on ultrathin APCS. Cell adhesion, proliferation, and functional gene expression of RCECs on tissue-culture plastic and APCS of different thicknesses were compared. The results indicated that ultrathin lamellae were superior in increasing cell viability and maintaining cell functions. Analyzing with histology, electron microscopy, and immunofluorescence, we found that RCECs cultured on 20 μm ultrathin APCS for 5 days grew into a confluent monolayer with a density of 3726 ± 223 cells/mm2 and expressed functional biomarkers Na+/K+-ATPase and zonula occludens. After 14 days, RCECs formed an early stage of Descemet's membrane-like structure by synthesizing collagen IV and laminin. Human corneal endothelial cells were also used to further validate the supportive effect of ultrathin APCS on cells. The resulting constructs were flexible and tough enough to implant into rabbits' anterior chambers through small incisions. TECES adhered to the posterior corneal stroma, and the thickness of cornea gradually reduced to normal after grafting. These results indicate that the ultrathin APCS can serve as a tissue engineering carrier and might be a suitable alternative for endothelial cells expansion in endothelial keratoplasty.
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Affiliation(s)
- Yingying Zhang
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Zhixin Hu
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Jingyu Qu
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Huatao Xie
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Jun Zhao
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Tingjun Fan
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, Shandong Province, China
| | - Xin Liu
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Mingchang Zhang
- Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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Ji X, Zheng M, Fan T, Xu B. Commentary: Novel Cell Culture Paradigm Prolongs Mouse Corneal Epithelial Cell Proliferative Activity In Vitro and In Vivo. Front Cell Dev Biol 2022; 10:822728. [PMID: 35252189 PMCID: PMC8894700 DOI: 10.3389/fcell.2022.822728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 01/19/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Xiuna Ji
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Mingyue Zheng
- Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Tingjun Fan
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Bin Xu
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
- *Correspondence: Bin Xu,
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Mullins D, Jiang J, Chen L, Fan T, Goodwin B, Lu M, Chen S, Boules M. P158 HEALTHCARE RESOURCE UTILIZATION AND ECONOMIC BURDEN OF EOSINOPHILIC ESOPHAGITIS: A US-BASED RETROSPECTIVE MATCHED COHORT STUDY. Ann Allergy Asthma Immunol 2021. [DOI: 10.1016/j.anai.2021.08.146] [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: 11/24/2022]
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Fan T, Ruan G, Antony B, Cao P, Li J, Han W, Li Y, Yung SN, Wluka AE, Winzenberg T, Cicuttini F, Ding C, Zhu Z. The interactions between MRI-detected osteophytes and bone marrow lesions or effusion-synovitis on knee symptom progression: an exploratory study. Osteoarthritis Cartilage 2021; 29:1296-1305. [PMID: 34216729 DOI: 10.1016/j.joca.2021.06.008] [Citation(s) in RCA: 3] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 06/17/2021] [Accepted: 06/22/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To investigate the longitudinal association between MRI-detected osteophyte scores and progression of knee symptoms, and whether the association was modified in the presence of bone marrow lesions (BMLs) or effusion-synovitis. METHODS Data from Vitamin D Effects on Osteoarthritis (VIDEO) study, a randomized, double-blinded and placebo-controlled clinical trial in symptomatic knee osteoarthritis (OA) patients, were analyzed as an exploratory study. Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) was used to assess knee symptoms. Osteophytes, BMLs and effusion-synovitis were measured using MRI. RESULTS 334 participants with MRI information and WOMAC score (baseline and follow-up) were included in the analyses, with 24.3% of them having knee pain increased 2 years later. Statistically significant interactions were found between MRI-detected osteophytes and BMLs or effusion-synovitis on increased knee symptoms. In participants with BMLs, higher baseline scores of MRI-detected osteophytes in most compartments were significantly associated with increased total knee pain, weight-bearing pain, stiffness, and physical dysfunction, after adjustment for age, sex, body mass index, intervention and effusion-synovitis. In participants with effusion-synovitis, higher baseline scores of MRI-detected osteophytes in almost all the compartments were significantly associated with increased total knee pain, weight-bearing pain, stiffness, and physical dysfunction, after adjustment for age, sex, body mass index, intervention and BMLs. In contrast, MRI-detected osteophyte scores were generally not associated with knee symptom progression in participants without baseline BMLs or effusion-synovitis. CONCLUSIONS MRI-detected OPs are associated with increased total knee pain, weight-bearing knee pain, stiffness and physical dysfunction in participants presenting BMLs or effusion-synovitis, but not in participants lacking BMLs or effusion-synovitis. This suggests they could interact with bone or synovial abnormalities to induce symptoms in knee OA.
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Affiliation(s)
- T Fan
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - G Ruan
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - B Antony
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia.
| | - P Cao
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - J Li
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - W Han
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Orthopaedics, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - Y Li
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - S N Yung
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - A E Wluka
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.
| | - T Winzenberg
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia.
| | - F Cicuttini
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.
| | - C Ding
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia; Department of Orthopaedics, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.
| | - Z Zhu
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Orthopaedics, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
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Deng TT, Song EH, Zhou YY, Chen JY, Cheng YF, Yuan J, Fan T. The use of a single ammonium acidic salt towards simple green co-precipitation synthesis for Mn4+-activated fluorides. Dalton Trans 2020; 49:5823-5831. [DOI: 10.1039/d0dt00986e] [Citation(s) in RCA: 7] [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] [Indexed: 11/21/2022]
Abstract
Simply using acidic salt NH4HF2 contributes to the green co-precipitation synthesis of Mn4+-doped fluorides for W-LED applications.
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Affiliation(s)
- T. T. Deng
- School of Physics and Optoelectronic Engineering
- Foshan University
- Foshan 528000
- China
- State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials
| | - E. H. Song
- State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials
- South China University of Technology
- Guangzhou 510641
- China
| | - Y. Y. Zhou
- State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials
- South China University of Technology
- Guangzhou 510641
- China
| | - J. Y. Chen
- School of Physics and Optoelectronic Engineering
- Foshan University
- Foshan 528000
- China
| | - Y. F. Cheng
- School of Physics and Optoelectronic Engineering
- Foshan University
- Foshan 528000
- China
| | - J. Yuan
- School of Physics and Optoelectronic Engineering
- Foshan University
- Foshan 528000
- China
| | - T. Fan
- School of Physics and Optoelectronic Engineering
- Foshan University
- Foshan 528000
- China
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Zhao J, Fan T, Ma X, Hu X. Construction of a high cell density human corneal endothelial equivalent and its transplantation in primate models. Xenotransplantation 2019; 26:e12514. [PMID: 30989737 DOI: 10.1111/xen.12514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 03/09/2019] [Accepted: 03/22/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Recently, many patients with corneal blindness caused by endothelial dysfunction have no opportunity to receive keratoplasty therapy because of the extremely limited number of donor corneas. Corneal tissue engineering opens a new path for in vitro reconstruction of tissue-engineered HCE which will cure the corneal endotheliopathy by clinical corneal transplantation. In this study, we construct a human corneal endothelium (HCE) equivalent with non-transfected monoclonal HCE (mcHCE) cells and modified denuded amniotic membrane (mdAM), and evaluate its functions in monkey models. METHODS Tissue-engineered HCE (TE-HCE) was constructed by culturing DiI-labeled mcHCE cells on mdAMs in 20% fetal bovine serum-containing DMEM/Ham's Nutrient Mixture F12 (1:1) medium and 5% CO2 at 37°C on a 24-well culture plate. The constructed TE-HCE was transplanted into monkey corneas via penetrating keratoplasty with Descemet's membrane and endothelium stripped. The corneal transparency, thickness, and intraocular pressure were monitored in vivo, and the corneal morphology and histological structure were examined ex vivo 181 days after surgery. RESULTS The constructed TE-HCE, with an average density of 3602.22 ± 45.22 cells/mm2 , mimicked its natural counterpart both in morphology and histological structure. In vivo, corneal transparency was maintained, and the corneal thickness gradually decreased to 567.33 ± 72.77 μm at day 181 after TE-HCE transplanted into monkey eyes, while intense corneal edema and turbid were found in mdAM-transplanted eyes with their corneal thicknesses maintained over 1000 μm during the monitoring period. Ex vivo, a monolayer of corneal endothelium, consisting of mcHCE cells at a density of 2795.65 ± 156.83 cells/mm2 , was reconstructed in transplanted monkey eyes. The cells in the transplanted area had the hexagonal or polygonal morphology and normal ultrastructure, and established plenty of cell-cell and cell-stromal matrix junctions. Besides, huge membrane-bounded flat stacks with electric dense inclusions were found in mcHCE cells beneath the plasma membrane at the stromal side. CONCLUSIONS The constructed TE-HCE has normal histological property and functions well in monkey models. The TE-HCE could be used as a promising HCE equivalent in therapy of corneal endothelium dysfunction and corneal regenerative medicine.
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Affiliation(s)
- Jun Zhao
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Tingjun Fan
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Xiya Ma
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - Xiuzhong Hu
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, China
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Chen X, Li Y, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Xie Y. Associations between RAD51D germline mutations and breast cancer risk and survival in BRCA1/2-negative breast cancers. Ann Oncol 2018; 29:2046-2051. [DOI: 10.1093/annonc/mdy338] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Su L, Zhang J, Meng H, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Xie Y. Prevalence of BRCA1/2 large genomic rearrangements in Chinese women with sporadic triple-negative or familial breast cancer. Clin Genet 2018; 94:165-169. [PMID: 29582426 DOI: 10.1111/cge.13256] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/09/2018] [Accepted: 03/23/2018] [Indexed: 11/29/2022]
Abstract
The prevalence of BRCA1/2 large genomic rearrangements (LGRs) and their underlying mechanisms have not been fully evaluated in Chinese women with breast cancer. In this study, we determined the prevalence of BRCA1/2 LGRs in 834 patients with familial breast cancer (FBC) and 660 patients with sporadic triple-negative breast cancer (TNBC) who were negative for BRCA1/2 small-range mutations using the multiplex ligation-dependent probe amplification method. We found that 20 index patients (2.4%) in the FBC group carried a BRCA1 or BRCA2 LGR, and the frequencies of BRCA1 and BRCA2 LGRs were 1.6% and 0.8%, respectively. Seven index patients (1.1%) carried a BRCA1 LGR in 660 sporadic TNBC patients, whereas no BRCA2 LGRs were found in these patients. Among the BRCA1/2 LGRs, 48.1% (13/27) were novel, and the breakpoints of the majority of the LGRs were identified. ΨBRCA1-mediated homologous recombination (HR) and Alu-mediated HR/non-homologous end-joining (NHEJ) accounted for 40% and 30% of the BRCA1 LGRs, respectively. Alu-mediated HR accounted for 71.4% of the BRCA2 LGRs, and the remaining one-third was generated through Long interspersed nuclear elements (LINE)-mediated NHEJ. Our findings suggest that both FBC patients and sporadic TNBC patients should be tested for BRCA1/2 LGRs.
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Affiliation(s)
- L Su
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - J Zhang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - H Meng
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - T Ouyang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - J Li
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - T Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - Z Fan
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - T Fan
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - B Lin
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
| | - Y Xie
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Centre, Peking University Cancer Hospital & Institute, Beijing, China
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Zhou R, Zang G, Yu Q, Pang K, Zhou X, He H, Liang Q, Fan T, Han C. Transurethral fluorescence cystoscopy guidance for total resection of bladder tumor. J BIOL REG HOMEOS AG 2018; 32:669-672. [PMID: 29921397] [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: 06/08/2023]
Abstract
The purpose of this work is to investigate the total resection of bladder tumor under transurethral fluorescence cystoscopy. Nineteen patients with bladder tumor, from which we resected a total of 26 tumors, including 16 single tumors with diameters of 0.5~2 cm, were enrolled in the study. All tumors were located in the posterior wall or neck of the bladder. For the surgery, the size and location of tumors in the bladder were observed by fluorescence cystoscopy. Then, plasma electrocision was used to cut the full-thickness of the bladder to the fat outside of the bladder along the near-end of the tumor, then along the left and right side of bladder (to the far-end), and the full-thickness of the tumor was resected. Finally, the far-end tumor was removed and the full-thickness of the bladder at the bottom was completely resected. All operations were completed successfully within 10-40 min. There was little bleeding during surgery and no secondary bleeding after surgery. Tumor staging found 17 patients at T1 stage (20 tumors) and 2 patients at T2 stage (6 tumors). Patients were followed up for 6~12 months without any recurrence. We show here that total resection of bladder tumor can be accomplished under transurethral fluorescence cystoscopy and preventative resection can be conducted on the suspicious bladder wall with precision to eliminate tumor residue that promotes recurrence.
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Affiliation(s)
- R Zhou
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
| | - G Zang
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
| | - Q Yu
- The Peoples Hospital of Shu Yang County, Wu Jieping Urinary Surgery Center, Shuyang, Jiangsu, China
| | - K Pang
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
| | - X Zhou
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
| | - H He
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
| | - Q Liang
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
| | - T Fan
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
| | - C Han
- Xuzhou Central Hospital Urinary Surgery, Southeast University Xuzhou Reproduction Institute, Xuzhou, Jiangsu, China
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13
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Xu B, Song Z, Fan T. Construction of Anterior Hemi-Corneal Equivalents Using Nontransfected Human Corneal Cells and Transplantation in Dog Models. Artif Organs 2017. [PMID: 28621916 DOI: 10.1111/aor.12878] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Tissue-engineered human anterior hemi-cornea (TE-aHC) is a promising equivalent for treating anterior lamellar keratopathy to surmount the severe shortage of donated corneas. This study was intended to construct a functional TE-aHC with nontransfected human corneal stromal (ntHCS) and epithelial (ntHCEP) cells using acellular porcine corneal stromata (aPCS) as a carrier scaffold, and evaluate its biological functions in a dog model. To construct a TE-aHC, ntHCS cells were injected into an aPCS scaffold and cultured for 3 days; then, ntHCEP cells were inoculated onto the Bowman's membrane of the scaffold and cultured for 5 days under air-liquid interface condition. After its morphology and histological structure were characterized, the constructed TE-aHC was transplanted into dog eyes via lamellar keratoplasty. The corneal transparency, thickness, intraocular pressure, epithelial integrity, and corneal regeneration were monitored in vivo, and the histological structure and histochemical property were examined ex vivo 360 days after surgery, respectively. The results showed that the constructed TE-aHC was highly transparent and composed of a corneal epithelium of 7-8 layer ntHCEP cells and a corneal stroma of regularly aligned collagen fibers and well-preserved glycosaminoglycans with sparsely distributed ntHCS cells, mimicking a normal anterior hemi-cornea (aHC). Moreover, both ntHCEP and ntHCS cells maintained positive expression of their marker and functional proteins. After transplantation into dog eyes, the constructed TE-aHC acted naturally in terms of morphology, structure and inherent property, and functioned well in maintaining corneal clarity, thickness, normal histological structure, and composition in dog models by reconstructing a normal aHC, which could be used as a promising aHC equivalent in corneal regenerative medicine and aHC disorder therapy.
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Affiliation(s)
- Bin Xu
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, China
| | - Zhan Song
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, China
| | - Tingjun Fan
- Key Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong Province, China
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Xu B, Zhang Y, Jing Z, Fan T. Molecular characteristics of hemoglobins in blood clam and their immune responses to bacterial infection. Int J Biol Macromol 2017; 99:375-383. [DOI: 10.1016/j.ijbiomac.2017.02.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 02/05/2017] [Accepted: 02/22/2017] [Indexed: 10/20/2022]
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15
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Wang ZJ, He YJ, Li JF, Xie YT, Wang TF, Fan ZQ, Fan T, Ouyang T. [Impact of the response of primary tumor to preoperative chemotherapy and anti-HER2 therapy on survival of HER2-positive breast cancer patients]. Zhonghua Yi Xue Za Zhi 2016; 96:2578-82. [PMID: 27596555 DOI: 10.3760/cma.j.issn.0376-2491.2016.32.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To study the impact of anti-HER2 therapy and response of primary tumor on distant disease free survival (DDFS) of the patients with HER2-positive breast cancer. METHODS The clinical data of the patients with HER2-positive breast cancer treated with neoadjuvant systemic therapy were analyzed retrospectively. RESULTS Patients treated with preoperative anti-HER2 therapy and chemotherapy had a significant improved pathological complete response (pCR) rate (48.4%) compared with those treated with preoperative chemotherapy (17.2%) (P=0.000). The median follow-up period was 62(6-160) months. The 5-year DDFS in patients with anti-HER2 therapy and patients without anti-HER2 therapy was 93.5% and 83.3% respectively (P=0.006). The 5-year DDFS in patients achieving a pCR and patients not achieving a pCR was 94.7% and 82.6% respectively(P=0.001). Among patients achieving a pCR, anti-HER2 therapy did not improve DDFS significantly (P=0.960). Benefits of anti-HER2 therapy in DDFS among patients without a pCR achieved statistical significance (P=0.028). CONCLUSIONS Combination of neoadjuvant anti-HER2 therapy and chemotherapy resulted in a higher pCR rate in HER2-overexpressing primary breast cancer. Patients treated with neoadjuvant systemic therapy who achieved a pCR have excellent outcome regardless of whether they received anti-HER2 therapy.
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Affiliation(s)
- Z J Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Cancer Prevention & Treatment Center, Peking University Cancer Hospital & Institute, Beijing 100142, China
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Barger A, Graca R, Bailey K, Messick J, de Lorimier LP, Fan T, Hoffmann W. Use of Alkaline Phosphatase Staining to Differentiate Canine Osteosarcoma from Other Vimentin-positive Tumors. Vet Pathol 2016; 42:161-5. [PMID: 15753469 DOI: 10.1354/vp.42-2-161] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [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: 11/19/2022]
Abstract
Aspiration of lytic bone lesions is an excellent diagnostic test in the initial evaluation of primary bone neoplasia. However, cytologically, it can be difficult to differentiate osteosarcoma (OSA) from other bone neoplasms, including fibrosarcoma, chondrosarcoma, synovial cell sarcoma, and plasma cell myeloma. The purpose of this study is to determine the sensitivity and specificity of alkaline phosphatase (ALP) staining to differentiate OSA from other tumors that express vimentin by immunocytochemistry or immunohistochemistry. ALP is a hydrolytic enzyme present in multiple tissues including liver, kidney, intestine, placenta, and bone. Hypothetically, neoplasms actively producing bone should be specifically positive for ALP staining. Unstained, cytologic specimens were incubated for 8-10 minutes with nitroblue tetrazolium chloride/5-bromo-4-chloro-3-indolyl phosphate toluidine salt-phosphatase substrate. A positive reaction stains the membrane of the cells gray to black. Samples were counterstained with a Romanowsky's stain to determine whether the sample was of representative cellularity. A total of 61 vimentin-positive neoplasms have been evaluated and confirmed histopathologically. Tumors that expressed vimentin and were positive for ALP included 33 OSAs, one multilobular tumor of bone, one amelanotic melanoma, and one chondrosarcoma. Tumors that expressed vimentin and were negative for ALP included chondrosarcomas (three of four), multiple fibrosarcomas, and multiple synovial cell sarcomas. The sensitivity is 100%, and the specificity is 89%. In conclusion, ALP appears to be a highly sensitive and fairly specific marker in the diagnosis of OSA.
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Affiliation(s)
- A Barger
- Department of Venterinary Pathology, College of Veterinary Medicine, University of Illinois, 288 SAC, 1008 Hazelwood Drive, Urbana, IL, USA.
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Fan T, Paramo J, Mesko T, Poppiti R, Ruiz A, Rodriguez E. Abstract P6-10-04: Factors determining underutilization of core biopsy prior to breast surgery. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p6-10-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
BACKGROUND:
The American College of Surgeons National Accreditation Program for Breast Centers, Standard 2.9, requires a palpation-guided or image-guided needle biopsy as the initial diagnostic approach for breast cancer rather than an open biopsy. In replacing excisional biopsies, this minimally invasive technique demonstrates accuracy and precision in determining tumor characteristics and allows for more optimal breast cancer care. Recent studies have suggested that needle biopsy is underused in the United States. In a recently published analysis of U.S. Medicare data from 2003-2007, needle biopsy was used in 68.4% of all patients with breast cancer surgery. In this single-institution study, we analyzed the utilization of image-guided preoperative breast biopsies and which patient and system related factors contributed to the underutilization of image-guided breast biopsies and clinical outcomes.
MATERIALS AND METHODS:
In this retrospective study, we analyzed all breast cancer cases diagnosed over a four year period at Mount Sinai Medical Center (MSMC) from January 1, 2009 to December 31, 2013 (n=485). We performed a detailed chart review of the surgical cases that did not meet breast biopsy standards to identify contributing patient and surgeon level factors. Descriptive statistics and univariate analysis were used to characterize breast biopsy patterns and outcomes as well as delineate the associations between patient and surgical covariates with needle biopsy receipt.
RESULTS:
Needle biopsy was used in 86% (n=419) of all breast cancer surgeries. The median age for the cohort of patients without needle biopsy was 68.0 years (range 35-94). There was no significant variation in utilization of needle biopsy by race or surgeon. The proportion of patients without needle biopsy decreased significantly over time from 2009-2013. The most common reason for the lack of preoperative breast biopsy was the surgeon's preference to proceed with surgery because of very suspicious imaging studies (including mammograms and MRI) (n=9). There were an additional nine cases where the biopsy was attempted but was non-diagnostic. The most common patient-related factors for lack of needle biopsy were advanced age, use of anticoagulation and noncompliance due to a psychiatric diagnosis and patient discomfort. Other factors identified include lack of surgeon consultation before biopsy, biopsy of axillary lymph nodes as a means of diagnosis and patient's inpatient status.
CONCLUSIONS:
In this single institution, the rate of needle biopsy for breast cancer diagnosis was above national benchmarks. The most common reason for lack of a preoperative breast biopsy was the surgeon's preference to proceed with surgery because of very suspicious imaging studies. Patients with advanced age, psychiatric history, and inpatient workup were also more likely to lack a preoperative breast biopsy.
Citation Format: Fan T, Paramo J, Mesko T, Poppiti R, Ruiz A, Rodriguez E. Factors determining underutilization of core biopsy prior to breast surgery. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P6-10-04.
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Affiliation(s)
- T Fan
- Creighton University School of Medicine, Omaha, NE; Mount Sinai Medical Center, Miami Beach, FL
| | - J Paramo
- Creighton University School of Medicine, Omaha, NE; Mount Sinai Medical Center, Miami Beach, FL
| | - T Mesko
- Creighton University School of Medicine, Omaha, NE; Mount Sinai Medical Center, Miami Beach, FL
| | - R Poppiti
- Creighton University School of Medicine, Omaha, NE; Mount Sinai Medical Center, Miami Beach, FL
| | - A Ruiz
- Creighton University School of Medicine, Omaha, NE; Mount Sinai Medical Center, Miami Beach, FL
| | - E Rodriguez
- Creighton University School of Medicine, Omaha, NE; Mount Sinai Medical Center, Miami Beach, FL
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Deng HP, Chen L, Fan T, Zhang B, Xu Y, Geng Q. Long non-coding RNA HOTTIP promotes tumor growth and inhibits cell apoptosis in lung cancer. Cell Mol Biol (Noisy-le-grand) 2015; 61:34-40. [PMID: 26265284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/07/2015] [Indexed: 06/04/2023]
Abstract
Lung cancer is one of the leading causes of cancer-related deaths worldwide. Early diagnosis is the best defense against this threat and is therefore of vital importance. In this study, we investigated the role of long non-coding RNA HOTTIP in the tumor growth of lung cancer. Initially, we found that expression of HOTTIP was significantly elevated in 20 cases of lung cancer. HOTTIP was also differentially expressed in a consecutive of lung cancer cell lines. Furthermore, specific shRNA against HOTTIP was employed to deplete expression of HOTTIP in A549 cells and NCI-H446 cells. After successfully depletion of HOTTIP, cell proliferation and colony formation were significantly inhibited in vitro. Tumor growth in vivo was also suppressed after depletion of HOTTIP in a mouse model of lung cancer. Moreover, depletion of HOTTIP caused cell cycle arrest in G0/G1 phase and induced significant cell apoptosis. Cell cycle regulators Cdc25C, Cyclin B1 and Cyclin D1 were decreased upon depletion of HOTTIP. Pro-apoptotic factor Bad was up-regulated, whereas anti-apoptotic factors Bcl-2 and Bcl-xL were down-regulated after HOTTIP ablation. These data suggest that lncRNA HOTTIP contributes to tumor growth in vivo and in vitro and inhibits cell apoptosis in lung cancer.
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Affiliation(s)
- H-P Deng
- Renmin Hospital of Wuhan University Department of Cardiothoracic Surgery Hubei China
| | - L Chen
- Renmin Hospital of Wuhan University Department of Cardiothoracic Surgery Hubei China
| | - T Fan
- Renmin Hospital of Wuhan University Department of Cardiothoracic Surgery Hubei China
| | - B Zhang
- Renmin Hospital of Wuhan University Department of Cardiothoracic Surgery Hubei China
| | - Y Xu
- Renmin Hospital of Wuhan University Department of Cardiothoracic Surgery Hubei China
| | - Q Geng
- Renmin Hospital of Wuhan University Department of Cardiothoracic Surgery Hubei China szgqing@126.com
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Gao M, Fan T, Duan J. SU-E-E-16: The Application of Texture Analysis for Differentiation of Central Cancer From Atelectasis. Med Phys 2015. [DOI: 10.1118/1.4923936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Lyu R, Ding Q, Govoni M, Makin C, Korn J, Fan T, Ogbonnaya A, Black C, Kachroo S. THU0435 Treatment Persistence with Subcutaneous Biologic Therapies in Patients with Psoriatic Arthritis (PSA). Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1543] [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: 11/04/2022]
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21
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Lyu R, Ding Q, Govoni M, Makin C, Korn J, Fan T, Ogbonnaya A, Black C, Kachroo S. AB0754 Persistence Rate with Subcutaneous Biologic Therapies in Patients with Ankylosing Spondylitis (AS). Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1456] [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: 11/04/2022]
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Gao M, Liu H, Fan T. SU-E-I-89: The Role of Reflectance Confocal Microscopy in the Screening of Hypo-Pigmented Mycosis Fungoides. Med Phys 2015. [DOI: 10.1118/1.4924086] [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: 11/07/2022] Open
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Xu B, Zhao J, Jing Z, Zhang Y, Shi Y, Fan T. Role of hemoglobin from blood clam Scapharca kagoshimensis beyond oxygen transport. Fish Shellfish Immunol 2015; 44:248-256. [PMID: 25700784 DOI: 10.1016/j.fsi.2015.02.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 02/06/2015] [Accepted: 02/09/2015] [Indexed: 06/04/2023]
Abstract
The evolutionary race between hosts and pathogens has led to a variety of adaptations. Little is known about the immunological role of hemoglobin (Hb) in antimicrobial immune responses. Results showed that a 31.2 kDa monodimer Hb (skHbI) and a 57.8 kDa heterotetramer Hb (skHbII) from the blood clam, Scapharca kagoshimensis, had phenoloxidase (PO)-like activities and antimicrobial activities. Both were found capable of oxidizing l-DOPA, catechol and hydroquinone. Their PO-like activities were visibly greatly inhibited by oxidase inhibitors, EDTA, and divalent metal ions, and greatly enhanced by isopropanol and Fe(2+), indicating that they have the properties of a metalloenzyme and a catecholase-type PO as well. They also showed obvious anti-bacterial activities against gram-positive bacteria but not against either gram-negative bacteria nor fungi. The anti-bacterial activities levels were a result of the generation of reactive oxygen species (ROS) of superoxide anions. These results indicate that skHbI and skHbII, not only function as iron-containing oxygen carriers, but also exert anti-bacterial activities and catecholase-type oxidizing activities. The fact that skHbII exerts high level of PO-like activity indicates different roles in the innate immunodefense system. These results may improve understanding of the multiple functions of invertebrate Hbs beyond serving as oxygen carriers and may provide insight into how the fundamental and universal mode of the innate immune system has persisted in respiratory proteins throughout the course of evolution.
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Affiliation(s)
- Bin Xu
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Jun Zhao
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Zhao Jing
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Department of Histology and Embryology, Medical College, Qingdao University, Qingdao 266021, China
| | - Yanan Zhang
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Department of Biology, Medical College, Qingdao University, Qingdao 266021, China
| | - Ying Shi
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Tingjun Fan
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
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Affiliation(s)
- Qian Wen
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
| | - Tingjun Fan
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
| | - Suran Bai
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
| | - Yunlong Sui
- Laboratory for Corneal Tissue Engineering, College of Marine Life Sciences, Ocean University of China, China
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Wang C, Zhang J, Wang Y, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Xie Y. Prevalence of BRCA1 mutations and responses to neoadjuvant chemotherapy among BRCA1 carriers and non-carriers with triple-negative breast cancer. Ann Oncol 2014; 26:523-8. [PMID: 25480878 DOI: 10.1093/annonc/mdu559] [Citation(s) in RCA: 43] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The frequency of BRCA1 germline mutations among Chinese women with triple-negative breast cancer is unclear, and the association between BRCA1 mutations and the response to neoadjuvant chemotherapy in women with triple-negative breast cancer has not been determined. PATIENTS AND METHODS Nine hundred and fifty-six triple-negative breast cancer patients were treated at our institute between 2003 and 2012; we tested the BRCA1/2 mutations for 956 patients and 953 patients in this cohort, respectively. Among the 956 patients, 652 patients received neoadjuvant chemotherapy. RESULTS In this cohort, 7.1% (68/956) and 2.3% (22/953) of patients carried a BRCA1 or BRCA2 mutation, respectively. The BRCA1/2 mutation rates were 10.5% and 3.0% among the patients who were diagnosed at or before the age of 50 in this cohort, respectively. The pCR (pathologic complete response) rate was 31.6% in the 652 patients who received neoadjuvant chemotherapy. BRCA1 carriers had a significantly higher pCR rate than non-carriers (BRCA1 carriers versus non-carriers, 53.8% versus 29.7%, P < 0.001). Among women treated with anthracycline with or without taxane regimens, the pCR rate was 57.1% for BRCA1 carriers, 29.0% for non-carriers (P < 0.001); among women treated with taxane regimens, the pCR rate was 40.0% for BRCA1 carriers, 32.9% for non-carriers (P = 0.73). At a median follow-up of 43 months, the recurrence-free survival was similar between BRCA1 carriers and non-carriers among the 947 patients of this study (adjusted hazard ratio = 0.92; 95% confidence interval: 0.45-1.90; P = 0.82). CONCLUSIONS Chinese women with triple-negative breast cancer who are diagnosed at or before age of 50 are candidates for BRCA1 genetic testing. Among triple-negative breast cancer patients, BRCA1 carriers are more likely to respond to neoadjuvant anthracycline-based regimens than are non-carriers.
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Affiliation(s)
- C Wang
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - J Zhang
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - Y Wang
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - T Ouyang
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - J Li
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - T Wang
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - Z Fan
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - T Fan
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - B Lin
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
| | - Y Xie
- Breast Center, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, PR China
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Perreault ML, Shen MYF, Fan T, George SR. Regulation of c-fos expression by the dopamine D1-D2 receptor heteromer. Neuroscience 2014; 285:194-203. [PMID: 25446350 DOI: 10.1016/j.neuroscience.2014.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 07/18/2014] [Revised: 11/03/2014] [Accepted: 11/10/2014] [Indexed: 11/24/2022]
Abstract
The dopamine D1 and D2 receptors form the D1-D2 receptor heteromer in a subset of neurons and couple to the Gq protein to regulate intracellular calcium signaling. In the present study the effect of D1-D2 heteromer activation and disruption on neuronal activation in the rat brain was mapped. This was accomplished using the dopamine agonist SKF 83959 to activate the D1-D2 heteromer in combination with a TAT-D1 disrupting peptide we developed, and which has been shown to disrupt the D1/D2 receptor interaction and antagonize D1-D2 heteromer-induced cell signaling and behavior. Acute SKF 83959 administration to rats induced significant c-fos expression in the nucleus accumbens that was significantly inhibited by TAT-D1 pretreatment. No effects of SKF 83959 were seen in caudate putamen. D1-D2 heteromer disruption by TAT-D1 did not have any effects in any striatal subregions, but induced significant c-fos immunoreactivity in a number of cortical regions including the orbitofrontal cortex, prelimbic and infralimbic cortices and piriform cortex. The induction of c-fos by TAT-D1 was also evident in the anterior olfactory nucleus, as well as the lateral habenula and thalamic nuclei. These findings show for the first time that the D1-D2 heteromer can differentially regulate c-fos expression in a region-dependent manner either through its activation or through tonic inhibition of neuronal activity.
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Affiliation(s)
- M L Perreault
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - M Y F Shen
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - T Fan
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - S R George
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada; Department of Medicine, University of Toronto, Toronto, ON, Canada.
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Lyu R, Ding Q, Govoni M, Fan T. Treatment Persistence With Subcutaneous Biologic Therapies in Patients With Psoriatic Arthritis (Psa). Value Health 2014; 17:A384-A385. [PMID: 27200865 DOI: 10.1016/j.jval.2014.08.2638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- R Lyu
- Merck & Co., Inc, Whitehouse Station, NJ, USA
| | - Q Ding
- Temple University, Philadelphia, PA, USA
| | - M Govoni
- Merck Sharp & Dohme Limited, Rome, Italy
| | - T Fan
- Merck & Co., Inc, Whitehouse Station, NJ, USA
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Xufei X, Nocente M, Bonomo F, Franzen P, Fröschle M, Grosso G, Grünauer F, Pasqualotto R, Tardocchi M, Fan T, Gorini G. Neutron measurements from beam-target reactions at the ELISE neutral beam test facility. Rev Sci Instrum 2014; 85:11D864. [PMID: 25430277 DOI: 10.1063/1.4896177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Measurements of 2.5 MeV neutron emission from beam-target reactions performed at the ELISE neutral beam test facility are presented in this paper. The measurements are used to study the penetration of a deuterium beam in a copper dump, based on the observation of the time evolution of the neutron counting rate from beam-target reactions with a liquid scintillation detector. A calculation based on a local mixing model of deuterium deposition in the target up to a concentration of 20% at saturation is used to evaluate the expected neutron yield for comparison with data. The results are of relevance to understand neutron emission associated to beam penetration in a solid target, with applications to diagnostic systems for the SPIDER and MITICA Neutral Beam Injection prototypes.
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Affiliation(s)
- X Xufei
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - M Nocente
- Dipartimento di Fisica "G. Occhialini", Università di Milano-Bicocca, Milano 20216, Italy
| | - F Bonomo
- Consorzio RFX, Padova 35100, Italy
| | - P Franzen
- Max-Planck-Institut für Plasmaphysik, Garching 84518, Germany
| | - M Fröschle
- Max-Planck-Institut für Plasmaphysik, Garching 84518, Germany
| | - G Grosso
- Istituto di Fisica del Plasma "P. Caldirola", Milano 20216, Italy
| | - F Grünauer
- Physics Consulting, Zorneding 85604, Germany
| | | | - M Tardocchi
- Istituto di Fisica del Plasma "P. Caldirola", Milano 20216, Italy
| | - T Fan
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - G Gorini
- Dipartimento di Fisica "G. Occhialini", Università di Milano-Bicocca, Milano 20216, Italy
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Lyu R, Ding Q, Govoni M, Fan T. Persistence Rate With Subcutaneous Biologic Therapies in Patients With Rheumatoid Arthritis (Ra). Value Health 2014; 17:A384. [PMID: 27200864 DOI: 10.1016/j.jval.2014.08.2634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- R Lyu
- Merck & Co., Inc, Whitehouse Station, NJ, USA
| | - Q Ding
- Temple University, Philadelphia, PA, USA
| | - M Govoni
- Merck Sharp & Dohme Limited, Rome, Italy
| | - T Fan
- Merck & Co., Inc, Whitehouse Station, NJ, USA
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Govoni M, Lyu R, Ding Q, Fan T. Persistence Rate With Subcutaneous Biologic Therapies in Patients With Ankylosing Spondylitis (As). Value Health 2014; 17:A384. [PMID: 27200867 DOI: 10.1016/j.jval.2014.08.2635] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- M Govoni
- Merck Sharp & Dohme Limited, Rome, Italy
| | - R Lyu
- Merck & Co., Inc, Whitehouse Station, NJ, USA
| | - Q Ding
- Temple University, Philadelphia, PA, USA
| | - T Fan
- Merck & Co., Inc, Whitehouse Station, NJ, USA
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Li F, Li J, Fan T, Shao Q, Xu M, Zhang Y, Qi H, Wang J. Evaluation of Movement of Peripheral Non-Small Cell Lung Cancer Using 4-Dimensional CT. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2482] [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: 10/24/2022]
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Lyu R, Govoni M, Ding Q, Fan T, Ogbonnaya A, Donga P, Korn J, Makin C. AB1091 Treatment Persistence with Subcutaneous Biologic Therapies in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4656] [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: 11/04/2022]
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Govoni M, Lyu R, Ding Q, Fan T, Ogbonnaya A, Donga P, Korn J, Makin C. AB1077 Treatment Patterns and Persistence with Subcutaneous Biologic Therapies in Patients with Ankylosing Spondylitis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3843] [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: 11/04/2022]
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Han X, Diao L, Xu Y, Xue W, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Xie Y. Association between the HER2 Ile655Val polymorphism and response to trastuzumab in women with operable primary breast cancer. Ann Oncol 2014; 25:1158-64. [DOI: 10.1093/annonc/mdu111] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zhang X, Källne J, Gorini G, Nocente M, Fan T, Yuan X, Xie X, Chen Z. Second generation fusion neutron time-of-flight spectrometer at optimized rate for fully digital data acquisition. Rev Sci Instrum 2014; 85:043503. [PMID: 24784603 DOI: 10.1063/1.4869804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The progress on high-rate event recording of data is taken as starting point to revisit the design of fusion neutron spectrometers based on the TOF (time-of-flight) technique. The study performed was aimed at how such instruments for optimized rate (TOFOR) can be further developed to enhance the plasma diagnostic capabilities based on measurement of the 2.5 MeV dd neutron emission from D plasmas, especially the weak spectral components that depend on discrimination of extraneous events. This paper describes a design (TOFOR II) adapted for use with digital wave form recording of all detector pulses providing information on both amplitude (pulse height) and timing. The results of simulations are presented and the performance enhancement is assessed in comparison to the present.
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Affiliation(s)
- X Zhang
- School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - J Källne
- Department of Engineering Sciences, Uppsala University, Uppsala, Sweden
| | - G Gorini
- Dipartimento di Fisica "G. Occhialini," Università di Milano-Bicocca, Piazza della Scienza 3, 20126 Milan, Italy
| | - M Nocente
- Dipartimento di Fisica "G. Occhialini," Università di Milano-Bicocca, Piazza della Scienza 3, 20126 Milan, Italy
| | - T Fan
- School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - X Yuan
- School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - X Xie
- School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - Z Chen
- School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing 100871, China
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Ruan Q, Wang P, Wang T, Qi J, Wei M, Wang S, Fan T, Johnson D, Wan X, Shi W, Sun H, Chen YH. MicroRNA-21 regulates T-cell apoptosis by directly targeting the tumor suppressor gene Tipe2. Cell Death Dis 2014; 5:e1095. [PMID: 24577093 PMCID: PMC3944261 DOI: 10.1038/cddis.2014.47] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 12/30/2013] [Accepted: 01/17/2014] [Indexed: 01/03/2023]
Abstract
MicroRNAs (MiRs) are short noncoding RNAs that can regulate gene expression. It has been reported that miR-21 suppresses apoptosis in activated T cells, but the molecular mechanism remains undefined. Tumor suppressor Tipe2 (or tumor necrosis factor-α-induced protein 8 (TNFAIP8)-like 2 (TNFAIP8L2)) is a newly identified anti-inflammatory protein of the TNFAIP8 family that is essential for maintaining immune homeostasis. We report here that miR-21 is a direct target of nuclear factor-κB and could regulate Tipe2 expression in a Tipe2 coding region-dependent manner. In activated T cells and macrophages, Tipe2 expression was markedly downregulated, whereas miR-21 expression was upregulated. Importantly, Tipe2-deficient T cells were significantly less sensitive to apoptosis. Conversely, overexpression of Tipe2 in EL-4 T cells increased their susceptibility to activation-induced apoptosis. Therefore, Tipe2 provides a molecular bridge between miR-21 and cell apoptosis; miR-21 suppresses apoptosis in activated T cells at least in part through directly targeting tumor suppressor gene Tipe2.
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Affiliation(s)
- Q Ruan
- 1] Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, People's Republic of China [2] 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - P Wang
- 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - T Wang
- 1] 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA [2] Shandong Eye Institute, Qingdao 266071, People's Republic of China
| | - J Qi
- 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - M Wei
- 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - S Wang
- Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, People's Republic of China
| | - T Fan
- Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, People's Republic of China
| | - D Johnson
- 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - X Wan
- Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, People's Republic of China
| | - W Shi
- Shandong Eye Institute, Qingdao 266071, People's Republic of China
| | - H Sun
- 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Y H Chen
- 713 Stellar-Chance Laboratories, Department of Pathology and Laboratory of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
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Zhou XJ, Zhou RS, Fan T, Han CH. Experience with the treatment of testicular yolk sac tumor in children: a report of 14 cases. Eur Rev Med Pharmacol Sci 2014; 18:3831-3833. [PMID: 25555873] [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: 06/04/2023]
Abstract
OBJECTIVE This paper discusses the optimal treatment for testicular yolk sac tumor at stage I in children. PATIENTS AND METHODS Fourteen children with testicular yolk sac tumor (including 10 cases of stage I and 4 cases of stage II) underwent high ligation of internal spermatic cord vein and orchiectomy. Among these, seven cases of stage I were below 1 year of age. Retroperitoneal lymph node dissection without postoperative systemic chemotherapy was implemented in 9 cases (5 cases of stage I and 4 cases of stage II), and only one was positive. RESULTS Among the 12 cases followed, 9 cases were alive (of these, 5 children < 1 year old, in stage I, underwent high ligation of internal spermatic cord vein and orchiectomy, with a survival time of 25 months to 10 years and 4 cases with radical retroperitoneal lymph node dissection). Three cases older than 1 year died of retroperitoneal lymph node and lung metastases. CONCLUSIONS For the high ligation of internal spermatic cord vein, orchiectomy is a kind of simple and effective treatment for children younger than 1 year with stage I, without recurrence and metastases. However, attention to the accuracy of staging and close observation are important aspects of the treatment.
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Affiliation(s)
- X-J Zhou
- Department of Urological Surgery, Central Hospital of Xuzhou, Xuzhou, Jiangsu, China.
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Qi H, Li J, Shao Q, Xu M, Fan T, Ma Z. Comparative Study of the Position and Volume of Related Anatomical Structures Between Quiet End-Inspiration and End-Expiration 3-Dimensional CT-Assisted With Active Breathing Control and Corresponding Phases in 4-Dimensional CT. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1351] [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: 11/16/2022]
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Ding Y, Li J, Wang W, Wang S, Fan T, Xu M, Shao Q, Ma Z. Displacement of the lumpectomy cavity defined by surgical clips and seroma based on 4D-CT scan for external-beam partial breast irradiation after breast-conserving surgery: a comparative study. Br J Radiol 2013; 86:20130416. [PMID: 23995875 DOI: 10.1259/bjr.20130416] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To compare the displacements of the lumpectomy cavity delineated by the surgical clips and the seroma based on four-dimensional CT (4D-CT) for external-beam partial breast irradiation (EB-PBI) after breast-conserving surgery (BCS). METHODS 14 breast cancer patients after BCS were recruited for EB-PBI and undertook 4D-CT simulation. On the 10 sets of the 4D-CT images, all the surgical clips in the cavity were delineated. The gross tumour volume (GTV) formed by the clips, the seroma, and both the clips and the seroma were defined as GTVc, GTVs and GTVc+s, respectively. The displacements of the centre of mass (COM) of the clips, GTVc, GTVs, GTVc+s and the selected clips in the three-dimensional (3D) directions were recorded and compared. RESULTS In the left-right, anterior-posterior and superior-inferior directions, the displacements were 2.20, 1.80 and 2.70 mm for the clip COM; 0.90, 1.05 and 1.20 mm for GTVc; 0.80, 1.05 and 0.80 mm for GTVs; and 0.90, 1.20 and 1.40 mm for GTVc+s, respectively. In the 3D directions, the displacements of the clip COM were greater than the GTVc, GTVs, GTVc+s, and the displacements of the clip COM, GTVc+s, GTVc and GTVs were significantly greater than the displacements of the selected clips (p<0.05). CONCLUSION The displacements of the clip COM were greater than that of the GTVc, GTVs, GTVc+s and the four selected clips. The optimal internal target volume should be defined based on the boundary displacements. ADVANCES IN KNOWLEDGE When the GTV was delineated using the clips and/or the seroma, there was displacement difference between the lumpectomy cavity centre and the boundary for the EB-PBI. The optimal internal target volume should be defined based on the boundary displacements of the lumpectomy cavity.
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Affiliation(s)
- Y Ding
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, China
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Wang W, Li J, Zhang Y, Li F, Xu M, Fan T, Shao Q, Shang D. Comparison of patient-specific internal gross tumor volume for radiation treatment of primary esophageal cancer based separately on three-dimensional and four-dimensional computed tomography images. Dis Esophagus 2013; 27:348-54. [PMID: 23796234 DOI: 10.1111/dote.12089] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
To compare the target volume, position and matching index of the patient-specific internal gross tumor volume (IGTV) based on three-dimensional (3D) and four-dimensional (4D) computed tomography (CT) images for primary esophageal cancer. Twenty-nine patients with primary thoracic esophageal cancer underwent 3DCT and 4DCT scans during free breathing. IGTVs were constructed using three approaches: combining the gross target volumes from the 10 respiratory phases of the 4DCT dataset to produce IGTV10 ; IGTV2 was acquired by combining the two extreme phases; and IGTV3D was created from the 3DCT-based gross target volume by enlarging the 95th percentile of motion in each direction measured by the 4DCT. 0.16 cm lateral (LR), 0.14 cm anteroposterior (AP) and 0.29 cm superoinferior (SI) in the upper; 0.18 cm LR, 0.10 cm AP and 0.63 cm SI in the middle; and 0.40 cm LR, 0.58 cm AP and 0.82 cm in the lower thoracic esophagus could account for 95% of respiratory-induced tumor motion. The centroid position shift between IGTV10 and IGTV2 was all below 0.10 cm, and less than 0.20 cm between IGTV10 and IGTV3D . IGTV10 was bigger than IGTV2 ; the mean value of matching index for IGTV2 to IGTV10 was 0.87 ± 0.05, 0.85 ± 0.06 and 0.83 ± 0.05 for upper, middle and distal thoracic esophageal tumors, respectively, and just 0.57 ± 0.11, 0.56 ± 0.13 and 0.40 ± 0.03 between IGTV3D and IGTV10 . 4DCT-based IGTV10 is a reasonable patient-specific IGTV for primary thoracic esophageal cancer, and IGTV2 is considered as an acceptable alternative to IGTV10 . However, it seems unreasonable to use IGTV3D substitute IGTV10 .
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Affiliation(s)
- W Wang
- Department of Radiation Oncology, Shandong Tumor Hospital, Jinan, Shandong, China
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Fan T, Ma X, Zhao J, Wen Q, Hu X, Yu H, Shi W. Transplantation of tissue-engineered human corneal endothelium in cat models. Mol Vis 2013; 19:400-7. [PMID: 23441111 PMCID: PMC3580986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 02/15/2013] [Indexed: 11/05/2022] Open
Abstract
PURPOSE To evaluate the performance of reconstructed tissue-engineered human corneal endothelium (TE-HCE) by corneal transplantation in cat models. METHODS TE-HCE reconstruction was performed by culturing 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI)-labeled monoclonal HCE cells on denuded amniotic membranes (dAMs) in 20% fetal bovine serum-containing Dulbecco's Modified Eagle's Medium/Ham's Nutrient Mixture F12 (1:1) medium and 5% CO(2) at 37 ° C on a 24-well culture plate. The reconstructed TE-HCE was transplanted into cat corneas via lamellar keratoplasty with all of the endothelium and part of Descemet's membrane stripped. Postsurgical corneas were monitored daily with their histological properties examined during a period of 104 days after transplantation. RESULTS The reconstructed TE-HCE at a density of 3,413.33 ± 111.23 cells/mm(2) in average established intense cell-cell and cell-dAM junctions. After lamellar keratoplasty surgery, no obvious edema was found in TE-HCE-transplanted cat corneas, which were transparent throughout the monitoring period. In contrast, intense corneal edema developed in dAM-transplanted cat corneas, which were turbid. The corneal thickness gradually decreased to 751.33 ± 11.37 μm on day 104 after TE-HCE transplantation, while that of dAM eye was over 1,000 μm in thickness during the monitoring period. A monolayer of endothelium consisting of TE-HCE-originated cells at a density of 2,573.33 ± 0.59 cells/mm(2) attached tightly to the surface of remnant Descemet's membrane over 104 days; this was similar to the normal eye control in cell density. CONCLUSIONS The reconstructed TE-HCE was able to function as a corneal endothelium equivalent and restore corneal function in cat models.
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Affiliation(s)
- Tingjun Fan
- Key Laboratory for Corneal Tissue Engineering, Ocean University of China, Qingdao, Shandong Province, China
| | - Xiya Ma
- Key Laboratory for Corneal Tissue Engineering, Ocean University of China, Qingdao, Shandong Province, China
| | - Jun Zhao
- Key Laboratory for Corneal Tissue Engineering, Ocean University of China, Qingdao, Shandong Province, China
| | - Qian Wen
- Key Laboratory for Corneal Tissue Engineering, Ocean University of China, Qingdao, Shandong Province, China
| | - Xiuzhong Hu
- Key Laboratory for Corneal Tissue Engineering, Ocean University of China, Qingdao, Shandong Province, China
| | - Haoze Yu
- Key Laboratory for Corneal Tissue Engineering, Ocean University of China, Qingdao, Shandong Province, China
| | - Weiyun Shi
- Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong Academy of Medical Sciences, Qingdao, Shandong Province, China
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Xu Y, Diao L, Chen Y, Liu Y, Wang C, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Deng D, Narod SA, Xie Y. Promoter methylation of BRCA1 in triple-negative breast cancer predicts sensitivity to adjuvant chemotherapy. Ann Oncol 2013; 24:1498-505. [PMID: 23406733 DOI: 10.1093/annonc/mdt011] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND BRCA1 function is inactivated through BRCA1 promoter methylation in a substantial number of triple-negative breast cancers. We investigated the impact of BRCA1-methylation status on the efficacy of adjuvant chemotherapy in patients with triple-negative breast cancer or with non-triple-negative breast cancer. METHODS BRCA1 promoter methylation was assessed in 1163 unselected breast cancer patients. Methylation was evaluated using a methylation-specific PCR (MSP) assay. RESULTS In the subgroup of 167 triple-negative breast cancer patients who received adjuvant chemotherapy, patients with BRCA1-methylated tumors had a superior 10-year disease-free survival (DFS)(78% versus 55%, P = 0.009) and 10-year disease-specific survival (DSS) (85% versus 69%, P = 0.024) than those with BRCA1-unmethylated tumors, and BRCA1 methylation was an independent favorable predictor of DFS and DSS in a multivariate analysis in this subgroup [DFS: hazard ratio (HR) = 0.45; 95% confidence interval (CI) 0.24-0.84; P = 0.019; DSS: HR = 0.43; 95% CI = 0.19-0.95; P = 0.044]. In contrast, in 675 non-triple-negative breast cancer patients who received adjuvant chemotherapy, BRCA1 methylation was an unfavorable predictor of DFS and DSS in univariate analysis (DFS: HR = 1.56; 95% CI 1.16-2.12; P = 0.003; DSS: HR = 1.53; 95% CI = 1.05-2.21; P = 0.026). CONCLUSIONS Triple-negative breast cancer patients with BRCA1-methylated tumors are sensitive to adjuvant chemotherapy and have a favorable survival compared with patients with BRCA1-unmethylated triple-negative tumors.
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Affiliation(s)
- Y Xu
- Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, Breast Center, Peking University Cancer Hospital & Institute, Beijing, PR China
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Wang W, Li J, Hu H, Fan T, Xu M, Shao Q. 4DCT-based Target Motion and Treatment Planning Variance for Whole Breast Radiation Therapy Account for Breathing Motion. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.620] [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: 10/27/2022]
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Wang W, Li J, Zhang Y, Fan T, Qi H, Xing J. Comparison of the Planning Target Volume Based on 3-dimensional CT and 4-dimensional CT Images of Thoracic Esophageal Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.819] [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: 10/27/2022]
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Fan T, Wang L, Fan X, Xu B, Yu M, Jiang G. A prophenoloxidase from Artemia sinica: cDNA cloning, expression and activity analysis during early development. Fish Shellfish Immunol 2011; 31:1059-1064. [PMID: 21963856 DOI: 10.1016/j.fsi.2011.09.006] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 09/06/2011] [Accepted: 09/09/2011] [Indexed: 05/31/2023]
Abstract
To understand the defense mechanisms of Crustacean animals, brine shrimp Artemia sinica prophenoloxidase (AsproPO) cDNA was cloned and its expression at early developmental stages was examined by reverse-transcription PCR (RT-PCR) and semi-quantitative RT-PCR, and activity of phenoloxidase (PO) at different developmental stages was further detected by using l-3,4-dihydroxyphenylalanine (l-DOPA) as a specific substrate in this study. It was found that the full-length of AsproPO cDNA is 2125 bp and it contains an open reading frame of 2100 bp encoding a protein of 699 amino acids. The deduced amino acid sequence of AsproPO has two putative copper binding sites highly conserved in Arthropods. Semi-quantitative RT-PCR analyses showed that the gene of AsproPO expressed at Emergence, Instar I and Instar II stages but did not at 0 h and 6 h stages. Activity measurement showed that PO activity could only be detected at Instar II stage but the other measured stages. All these implied that Artemia proPO immune system was complexly modulated during early development.
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Affiliation(s)
- Tingjun Fan
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Yushan Road 5, Qingdao 266003, People's Republic of China.
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Li F, Li J, Zhang Y, Xu M, Shao Q, Fan T, Tian S. Comparison of the Planning Target Volume Based on Three-dimensional CT and Four-dimensional CT Images of Non-small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1382] [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]
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Fan T, Jing Z, Fan X, Yu M, Jiang G. Purification and characterization of phenoloxidase from brine shrimp Artemia sinica. Acta Biochim Biophys Sin (Shanghai) 2011; 43:722-8. [PMID: 21757454 DOI: 10.1093/abbs/gmr061] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Phenoloxidase from Artemia sinica (AsPO) was purified by Superdex 200 gel-filtration and Q Sepharose fast flow ion-exchange chromatography, and its properties were characterized biochemically and enzymatically by using L-dihydroxyphenylalanine (L-DOPA) as the specific substrate. Results showed that AsPO was isolated as a monomeric protein of 125.5 kDa in molecular mass. The optimal pH value and temperature are 7.0 and 50°C, respectively, for its PO activity. The AsPO had an apparent K(m) value of 4.2 mM on L-DOPA, and 10.9 mM on catechol, respectively. Oxidase inhibitor on PO activity showed that the AsPO was extremely sensitive to ascorbic acid, sodium sulfite, and citric acid; and was very sensitive to cysteine, benzoic acid, and 1-phenyl-2-thiourea. Combined with its specific enzyme activity on L-DOPA and catechol, it can be concluded that AsPO is most probably a typical catechol-type O-diphenoloxidase. Its PO activity was also sensitive to metal ions and chelators, and 20 mM DETC-inhibited PO activity was obviously recovered by 15 mM Cu(2+), indicating that AsPO is most probably a copper-containing metalloenzyme. All these data about specific substrate, sensitivity to oxidase inhibitor metal ions and chelators indicate that the AsPO has the properties of a catechol-type copper-containing O-diphenoloxidase that functions as a vital humoral factor in host defense via melaninization as in other Crustaceans.
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Affiliation(s)
- Tingjun Fan
- Department of Marine Biology, College of Marine Life Sciences, Ocean University of China, Qingdao.
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Yao L, Liu Y, Li Z, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Xie Y. HER2 and response to anthracycline-based neoadjuvant chemotherapy in breast cancer. Ann Oncol 2011; 22:1326-1331. [DOI: 10.1093/annonc/mdq612] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jiang G, Xu X, Jing Y, Wang R, Fan T. Comparative studies on sorting cells from Artemia sinica at different developmental stages for in vitro cell culture. In Vitro Cell Dev Biol Anim 2011; 47:341-5. [PMID: 21512890 DOI: 10.1007/s11626-011-9389-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Accepted: 01/26/2011] [Indexed: 11/30/2022]
Abstract
Cell growth in primary cell culture of the brine shrimp (Artemia sinica) embryo at 12 and 20 h after rehydration at 25°C was examined comparatively in modified Leibovitz-15 medium. The cells from A. sinica embryo at 12 h after rehydration were dispersed, and the cells disseminated but did not attach to the surface of wells and multiply at 2 d of culture, and 12 d later, the cells were degenerated and dead. The best growth of the brine shrimp cells was obtained from the prenauplii of A. sinica at 20 h after dormant embryo rehydration. The fibroblast-like cells attached to the well surface and multiplied at 15 d after the primary culture was set up. Confluent monolayer was formed at 50 d. The prenauplii cells have been subcultured up to passage 3 and maintained for approximately 200 d. The reasons for cell growth potential at the different developmental stages of Artemia embryo were discussed.
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Affiliation(s)
- Guojian Jiang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
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Lauder A, Cima M, Sachs E, Fan T. Three Dimensional Printing: Surface Finish and Microstructure of Rapid Prototyped Components. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-249-331] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThree Dimensional Printing is a process for rapid prototyping of functional components. Thin layers of powder are bound in selected areas by ink-jet printing of a liquid binder. Layers are added sequentially until a three dimensional part is completed. The unbound powder is then removed. The raster scan pattern and layering used in forming has an observable effect on the surface finish and microstructure of the part, as does the chemistry of the particular materials system used. Important phenomena include ballistic interaction of the jet with the powder bed and wicking of the binder. Process parameters such as layer height, flow rate, and powder density were studied. Microstructural examination of the printed components is also reported.
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