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He F, Gao B, Cheng X, Zhai J, Zhang X, Yang C, Jiewei T. High-level production of poly-γ-glutamic acid by a newly isolated Bacillus sp. YJY-8 and potential use in increasing the production of tomato. Prep Biochem Biotechnol 2024; 54:637-646. [PMID: 37768129 DOI: 10.1080/10826068.2023.2261058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
Strain YJY-8, a new γ-polyglutamic acid producer, was separated from fermented soybean paste samples. The strain was identified as a genus of Bacillus by morphological and 16S rDNA sequence analysis and was named Bacillus sp. YJY-8. The optimal medium composition and cultural conditions were studied using a single-factor experiment and a response surface experiment. The optimized medium consisted of monosodium glutamate 70 g/L, glucose 54.3 g/L, glycerol 31.8 g/L, ammonium sulfate 11.1 g/L, yeast extract 3.2 g/L, tryptone 1.5 g/L, L-glutamic acid 6.8 g/L, MgSO4 7H2O 0.5 g/L, FeCl3 6H2O 0.02 g/L, KH2PO4 0.9 g/L, CaCl2 0.03 g/L, MnSO4 H2O 0.3 g/L, ammonium molybdate 0.02 g/L, pH 7.0. The optimal cultivation conditions were 35 °C and pH 7.0. Under the optimized conditions, after 48 hr of cultivation, the highest shaking flask fermentation level of γ-PGA reached 65.2 ± 0.36 g/L. In addition, through fed-batch fermentation in 30 L fermenters, the fermentation level of γ-PGA reached its highest level at 88.42 g/L and productivity was 1.23 g/(L hr) after 72 hr. Then, the effect of γ-PGA on tomato yield was investigated. At the seedling stage, the plant height and stem diameter of γ-PGA treated plants increased by 5.69 and 15.735% after spraying γ-PGA for 19 days. During the flowering and fruiting period, the stem diameter of the γ-PGA treatment group increased by 6.74%, with a maximum increase of 11.65%. The number of fruit branches increased by 0.56-16.29% and the number of fruit sets increased by 1.01-28.47%. At the fruit maturation stage, the yield of tomatoes increased by 10.51, 14.27, and 5.83%.
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Affiliation(s)
- Fuming He
- Chambroad Chemical Industry Research Institute Co., Ltd, Binzhou, P.R. China
| | - Baojun Gao
- Chambroad Chemical Industry Research Institute Co., Ltd, Binzhou, P.R. China
| | - Xin Cheng
- Chambroad Chemical Industry Research Institute Co., Ltd, Binzhou, P.R. China
| | - Jiao Zhai
- Chambroad Chemical Industry Research Institute Co., Ltd, Binzhou, P.R. China
| | - Xinqing Zhang
- Chambroad Chemical Industry Research Institute Co., Ltd, Binzhou, P.R. China
| | - Chuanlun Yang
- Chambroad Chemical Industry Research Institute Co., Ltd, Binzhou, P.R. China
| | - Tian Jiewei
- Chambroad Chemical Industry Research Institute Co., Ltd, Binzhou, P.R. China
- Shan Dong Chambroad Holding Group Co., Ltd, Binzhou, P.R. China
- Key Laboratory of Leather Chemistry and Engineering, Ministry of Education and College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu, P.R. China
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Xie X, Zhai J, Zhou X, Guo Z, Lo PC, Zhu G, Chan KWY, Yang M. Magnetic Particle Imaging: From Tracer Design to Biomedical Applications in Vasculature Abnormality. Adv Mater 2024; 36:e2306450. [PMID: 37812831 DOI: 10.1002/adma.202306450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/14/2023] [Indexed: 10/11/2023]
Abstract
Magnetic particle imaging (MPI) is an emerging non-invasive tomographic technique based on the response of magnetic nanoparticles (MNPs) to oscillating drive fields at the center of a static magnetic gradient. In contrast to magnetic resonance imaging (MRI), which is driven by uniform magnetic fields and projects the anatomic information of the subjects, MPI directly tracks and quantifies MNPs in vivo without background signals. Moreover, it does not require radioactive tracers and has no limitations on imaging depth. This article first introduces the basic principles of MPI and important features of MNPs for imaging sensitivity, spatial resolution, and targeted biodistribution. The latest research aiming to optimize the performance of MPI tracers is reviewed based on their material composition, physical properties, and surface modifications. While the unique advantages of MPI have led to a series of promising biomedical applications, recent development of MPI in investigating vascular abnormalities in cardiovascular and cerebrovascular systems, and cancer are also discussed. Finally, recent progress and challenges in the clinical translation of MPI are discussed to provide possible directions for future research and development.
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Affiliation(s)
- Xulin Xie
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Jiao Zhai
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Xiaoyu Zhou
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Zhengjun Guo
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
- Department of Oncology, the Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Pui-Chi Lo
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
| | - Guangyu Zhu
- Department of Chemistry, City University of Hong Kong, Hong Kong SAR, 999077, China
| | - Kannie W Y Chan
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong SAR, 999077, China
| | - Mengsu Yang
- Department of Precision Diagnostic and Therapeutic Technology, City University of Hong Kong Shenzhen Futian Research Institute, Shenzhen, 518057, China
- Department of Biomedical Sciences, and Tung Biomedical Sciences Centre, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China
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Guo R, Zhai J, Zou YX, Wang XL, Bi Y. [Interventional bronchoscopic treatment for post-infectious bronchitis obliterans]. Zhonghua Er Ke Za Zhi 2024; 62:374-376. [PMID: 38527510 DOI: 10.3760/cma.j.cn112140-20231208-00420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Affiliation(s)
- R Guo
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University)Machang District, Tianjin Key Laboratory of Birth Defects for Prevetion and Treatment, Tianjin 300074, China
| | - J Zhai
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University)Machang District, Tianjin Key Laboratory of Birth Defects for Prevetion and Treatment, Tianjin 300074, China
| | - Y X Zou
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University)Machang District, Tianjin Key Laboratory of Birth Defects for Prevetion and Treatment, Tianjin 300074, China
| | - X L Wang
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University)Machang District, Tianjin Key Laboratory of Birth Defects for Prevetion and Treatment, Tianjin 300074, China
| | - Y Bi
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University)Machang District, Tianjin Key Laboratory of Birth Defects for Prevetion and Treatment, Tianjin 300074, China
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Yang X, Li R, Zhai J, Fan Y, Gong S, Li L, Nie X, Li W. Effects of early enteral nutrition in patients with severe burns: A systematic review. Medicine (Baltimore) 2024; 103:e37023. [PMID: 38363893 PMCID: PMC10869067 DOI: 10.1097/md.0000000000037023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/02/2024] [Indexed: 02/18/2024] Open
Abstract
BACKGROUND Nutritional problems in the early stages of severe burns are prominent and seriously affect the clinical outcomes of patients. Our aim is to analyze the effects of early enteral nutrition (EEN) in patients with severe burns. METHODS In this study, relevant articles were searched in 8 English and Chinese data, with a time limit from the creation of the database to June 2023. Two researchers independently completed the search, screening and quality assessment of the articles. We conducted a systematic review and meta-analysis of randomized controlled trials that examined EEN therapy in people with severe burns. We compared the effects of EEN and non-EEN therapy in severely burned patients. The outcomes were mortality, gastrointestinal complications, nutritional indicators, gastrointestinal hormones, sepsis, length of hospital stay and wound healing time. Categorical variables were expressed as OR and 95% CI was calculated, and continuous variables were expressed as MD and 95% CI was calculated. The protocol for this systematic review was registered in PROSPERO on May 12, 2023 (identifier CRD42023422895). RESULTS Nineteen studies with a total of 1066 participants met the inclusion criteria. When comparing EEN therapy with non-EEN therapy, the experiment group had significantly lower mortality [OR = 0.39, 95% CI (0.20, 0.74), P = .004], lower wound healing time [MD = -10.77, 95% CI (-13.66,-7.88), P < .00001], fewer gastrointestinal complications [OR = 0.18, 95% CI (0.09, 0.36), P < .00001], lower rates of gastrointestinal hemorrhage [OR = 0.12, 95% CI (0.04, 0.36), P = .0001], lower rates of sepsis [OR = 0.40, 95% CI (0.24, 0.66), P = .0005], shorter length of hospital stay [MD = -12.08, 95% CI (-13.61, 9.19-10.56), P < .00001], and higher prealbumin levels [MD = 29.04, 95% CI (21.98, 36.10), P < .00001], higher total albumin levels [MD = 6.74, 95% CI (4.29, 9.19), P < .00001], and gastrin levels [MD = 15.93, 95% CI (10.12, 21.73), P < .00001]. However, there was no significant difference in albumin between the 2 groups [MD = 2.62, 95% CI (-0.30, 5.55), P = .08] or motilin levels [MD = 12.48, 95% CI (-43.59, 68.56), P = .66]. CONCLUSIONS EEN plays an important role in the rehabilitation of patients with severe burns. EEN is beneficial to reduce complications and the length of hospital stay, maintain organ function, optimize the nutritional status of patients, promote wound healing, and improve the survival rate of patients.
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Affiliation(s)
- Xiaojuan Yang
- Department of Burns, Sichuan Provincial People’s Hospital, Chengdu, Sichuan Province, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
| | - Rong Li
- Department of Maternity, Sichuan Provincial People’s Hospital, Chengdu, Sichuan Province, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
| | - Jiao Zhai
- Department of Pediatric Surgery, Sichuan Provincial People’s Hospital, Chengdu, Sichuan Province, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
| | - Yu Fan
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
| | - Shuangying Gong
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
| | - Linzhang Li
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
- Department of Respiratory, Wenjiang district people’s Hospital of Chengdu, Sichuan Province, China
| | - Xinyue Nie
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
| | - Wei Li
- Department of Burns, Sichuan Provincial People’s Hospital, Chengdu, Sichuan Province, China
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
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Li C, Zhai J, Jia Y. Digital Microfluidics with an On-Chip Drug Dispenser for Single or Combinational Drug Screening. Methods Mol Biol 2023; 2679:25-39. [PMID: 37300607 DOI: 10.1007/978-1-0716-3271-0_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Rapid and accurate cancer drug screening is of great importance in precision medicine. However, the limited amount of tumor biopsy samples has hindered the application of traditional drug screening methods with microwell plates for individual patients. A microfluidic system provides an ideal platform for handling trace amounts of samples. This emerging platform has a good role in nucleic acid-related and cell related assays. Nevertheless, convenient drug dispensing remains a challenge for clinical on-chip cancer drug screening. Similar sized droplets are merged to add drugs for a desired screened concentration which significantly complicated the on-chip drug dispensing protocols. Here, we introduce a novel digital microfluidic system with a specially structured electrode (a drug dispenser) to dispense drugs by droplet electro-ejection under a high-voltage actuation signal, which can be conveniently adjusted by external electric controls. With this system, the screened drug concentrations span up to four orders of magnitude with small sample consumption. Various amounts of drugs can be delivered to the cell sample with desired amount in a flexible electric control. Moreover, single drug or combinatorial multidrug on-chip screening can be readily achieved. The drug response of normal MCF-10A breast cells and MDA-MB-231 breast tumor cells to two chemotherapeutic substances, cisplatin (Cis) and epirubicin (EP), was tested individually and in combination for proof-of-principle verification. The comparable on-chip and off-chip results confirmed the feasibility of our innovative DMF system for cancer drug screening.
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Affiliation(s)
- Caiwei Li
- State Key Laboratory of Analog- and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China
- Faculty of Science and Technology - DECE, University of Macau, Macau, China
| | - Jiao Zhai
- State Key Laboratory of Analog- and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China
| | - Yanwei Jia
- State Key Laboratory of Analog- and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
- Faculty of Science and Technology - DECE, University of Macau, Macau, China.
- Faculty of Health Sciences, University of Macau, Macau, China.
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Macau, China.
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Wang XL, Zhai J, Zou YX. [Clinical characteristics and vaccination status of SARS-CoV-2 Omicron variant infected children]. Zhonghua Er Ke Za Zhi 2022; 60:671-675. [PMID: 35750640 DOI: 10.3760/cma.j.cn112140-20220506-00417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the clinical characteristics and vaccination status of SARS-CoV-2 Omicron variant infected children. Methods: A total of 105 children infected with Omicron variant admitted to Tianjin Haihe Hospital (designated referral hospital for SARS-CoV-2 infection in Tianjin) from January 8, 2022 to February 3 were included for a retrospective study. The cases were divided into pneumonia group and non-pneumonia group according to chest imaging. Based on the doses of inactivated SARS-CoV-2 vaccine, the children who completed SARS-CoV-2 antibody test within 3 days after hospitalization were divided into 2 dose group and<2 dose group.Rank sum test and Chi-square test were used for the comparison between the groups. Results: The age of these 105 children was 10 (8, 11) years on admission, 53 children were males and 52 were females. Eighty-seven cases (82.9%) had mild symptoms, 13 cases (12.4%) had common symptoms and 5 cases (4.8%) were asymptomatic. Ninety-one cases (86.7%) completed 2 doses vaccination. The clinical symptoms were characterized by cough (74 cases, 70.5%), fever (58 cases, 55.2%), sore or dry throat (34 cases, 32.4%), nasal congestion (28 cases, 26.7%), rhinorrhea (23 cases, 21.9%). None of the children received antivirals, steroids, immunosuppressant or oxygen therapy. Seventy-six cases(72.4%) received traditional Chinese medicine treatment. The pneumonia group had a higher rate of positive SARS-CoV-2 IgG within 1 day after admission (13/13 vs. 87.0% (80/92), χ2=42.81, P<0.001) than the non-pneumonia group. Among the 62 children who had serial SARS-CoV-2 antibody tests within 3 days after hospitalization, Compared to the<2 dose group, the 2 dose group had a higher rate of nucleic acid conversion within 16 days after onset and a higher rate of positive SARS-CoV-2 IgG 1 day after admission and 3 days after hospitalization (96.4% (54/56) vs. 4/6, 100.0% (56/56) vs. 2/6, 100.0% (56/56) vs. 3/6, all P<0.05). Conclusions: Most children infected with Omicron variant have mild symptoms, mainly respiratory infection symptoms. The proportion of SARS-CoV-2 antibody IgG positive in children who have received 2 doses of inactivated SARS-CoV-2 vaccines is higher,and the time of whose nucleic acid conversion may be shortened.
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Affiliation(s)
- X L Wang
- Department of Infection,Tianjin Children's Hospital (Children's Hospital of Tianjin University) Machang Campus, Tianjin 300074, China
| | - J Zhai
- Department of Infection,Tianjin Children's Hospital (Children's Hospital of Tianjin University) Machang Campus, Tianjin 300074, China
| | - Y X Zou
- Department of Infection,Tianjin Children's Hospital (Children's Hospital of Tianjin University) Machang Campus, Tianjin 300074, China
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Zhai J, Li C, Li H, Yi S, Yang N, Miao K, Deng C, Jia Y, Mak PI, Martins RP. Cancer drug screening with an on-chip multi-drug dispenser in digital microfluidics. Lab Chip 2021; 21:4749-4759. [PMID: 34761772 DOI: 10.1039/d1lc00895a] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Microfluidics has been the most promising platform for drug screening with a limited number of cells. However, convenient on-chip preparation of a wide range of drug concentrations remains a large challenge and has restricted wide acceptance of microfluidics in precision medicine. In this paper, we report a digital microfluidic system with an innovative control structure and chip design for on-chip drug dispensing to generate concentrations that span three to four orders of magnitude, enabling single drug or combinatorial multi-drug screening with simple electronic control. Specifically, we utilize droplet ejection from a drug drop sitting on a special electrode, named a drug dispenser, under high-voltage pulse actuation to deliver the desired amount of drugs to be picked up by a cell suspension drop driven by low-voltage sine wave actuation. Our proof-of-principle validation for this technique as a convenient single and multi-drug screening involved testing of the drug toxicity of two chemotherapeutics, cisplatin (Cis) and epirubicin (EP), towards MDA-MB-231 breast cancer cells and MCF-10A normal breast cells. The results are consistent with those screened based on traditional 96-well plates. These findings demonstrate the reliability of the drug screening system with an on-chip drug dispenser. This system with fewer cancer cells, less drug consumption, a small footprint, and high scalability with regard to concentration could pave the way for drug screening on biopsied primary tumor cells for precision medicine or any concentration-related research.
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Affiliation(s)
- Jiao Zhai
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
- Department of Biomedical Sciences/Tung Biomedical Sciences Centre, City University of Hong Kong, Hong Kong, China
| | - Caiwei Li
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
- Faculty of Science and Technology - DECE, University of Macau, Macau, China
| | - Haoran Li
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
- Faculty of Science and Technology - DECE, University of Macau, Macau, China
| | - Shuhong Yi
- Liver Transplantation Center, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ning Yang
- Department of Electronic Information Engineering, Jiangsu University, Zhenjiang, China
| | - Kai Miao
- Faculty of Health Sciences, University of Macau, Macau, China
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Macau, China
| | - Chuxia Deng
- Faculty of Health Sciences, University of Macau, Macau, China
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Macau, China
| | - Yanwei Jia
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
- Faculty of Science and Technology - DECE, University of Macau, Macau, China
- Faculty of Health Sciences, University of Macau, Macau, China
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Macau, China
| | - Pui-In Mak
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
- Faculty of Science and Technology - DECE, University of Macau, Macau, China
| | - Rui P Martins
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
- Faculty of Science and Technology - DECE, University of Macau, Macau, China
- On leave from Instituto Superior Tecnico, Universidade de Lisboa, Portugal
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Song N, Zhang J, Zhai J, Hong J, Yuan C, Liang M. Ferritin: A Multifunctional Nanoplatform for Biological Detection, Imaging Diagnosis, and Drug Delivery. Acc Chem Res 2021; 54:3313-3325. [PMID: 34415728 DOI: 10.1021/acs.accounts.1c00267] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Ferritins are spherical iron storage proteins within cells that are composed of a combination of 24 subunits of two types, heavy-chain ferritin (HFn) and light-chain ferritin (LFn). They autoassemble naturally into a spherical hollow nanocage with an outer diameter of 12 nm and an interior cavity that is 8 nm in diameter. In recent years, with the constantly emerging safety issues and the concerns about unfavorable uniformity and indefinite in vivo behavior of traditional nanomedicines, the characteristics of native ferritin nanocages, such as the unique nanocage structure, excellent safety profile, and definite in vivo behavior, make ferritin-based formulations uniquely attractive for nanomedicine development. To date, a variety of cargo molecules, including therapeutic drugs (e.g., cisplatin, carboplatin, paclitaxel, curcumin, atropine, quercetin, gefitinib, daunomycin, epirubicin, doxorubicin, etc.), imaging agents (e.g., fluorescence dyes, radioisotopes, and MRI contrast agents), nucleic acids (e.g., siRNA and miRNA), and metal nanoparticles (e.g., Fe3O4, CeO2, AuPd, CuS, CoPt, FeCo, Ag, etc.) have been loaded into the interior cavity of ferritin nanocages for a broad range of biomedical applications from in vitro biosensing to targeted delivery of cargo molecules in living systems with the aid of modified targeting ligands either genetically or chemically. We reported that human HFn could selectively deliver a large amount of cargo into tumors in vivo via transferrin receptor 1 (TfR1)-mediated tumor-cell-specific targeting followed by rapid internalization. By the use of the intrinsic tumor-targeting property and unique nanocage structure of human HFn, a broad variety of cargo-loaded HFn formulations have been developed for biological analysis, imaging diagnosis, and medicine development. In view of the intrinsic tumor-targeting property, unique nanocage structure, lack of immunogenicity, and definite in vivo behavior, human HFn holds promise to promote therapeutic drugs, diagnostic imaging agents, and targeting moieties into multifunctional nanomedicines.Since the report of the intrinsic tumor-targeting property of human HFn, we have extensively explored human HFn as an ideal nanocarrier for tumor-targeted delivery of anticancer drugs, MRI contrast agents, inorganic nanoparticles, and radioisotopes. In particular, by the use of genetic tools, we also have genetically engineered human HFn nanocages to recognize a broader range of disease biomarkers. In this Account, we systematically review human ferritins from characterizing their tumor-binding property and understanding their mechanism and kinetics for cargo loading to exploring their biomedical applications. We finally discuss the prospect of ferritin-based formulations to become next-generation nanomedicines. We expect that ferritin formulations with unique physicochemical characteristics and intrinsic tumor-targeting property will attract broad interest in fundamental drug research and offer new opportunities for nanomedicine development.
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Affiliation(s)
- Ningning Song
- Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Jianlin Zhang
- Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Jiao Zhai
- Tung Foundation Biomedical Sciences Centre/Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Juanji Hong
- Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Chang Yuan
- Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Minmin Liang
- Experimental Center of Advanced Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
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Sobotka D, Zhai J, Makinia J. Generalized temperature dependence model for anammox process kinetics. Sci Total Environ 2021; 775:145760. [PMID: 33631594 DOI: 10.1016/j.scitotenv.2021.145760] [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] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/06/2021] [Accepted: 02/06/2021] [Indexed: 06/12/2023]
Abstract
Temperature is a key operational factor influencing the anammox process kinetics. In particular, at temperatures below 15 °C, the specific anammox activity (SAA) considerably decreases. This study aimed to describe the temperature dependence of the anammox process kinetics in the temperature range from 10 to 55 °C, including the specific characteristics of "cold anammox". The commonly used Arrhenius and extended and modified Ratkowsky equations were examined. The Ratkowsky equations yielded a strong correlation (coefficient of determination, R2 = 0.93-0.96) between the measured and predicted data over the analyzed temperature range (10-55 °C). However, these equations could not correctly reflect the anammox temperature dependence at temperatures below 15 °C (R2 = 0.36-0.48). Therefore, a new generalized temperature model was proposed. The generalized temperature equation (GTE) considered the division of the analyzed temperature range into three temperature ranges: 10-15 °C, 15-35 °C and 35-55 °C. The ranges correspond to "cold anammox", "(low) mesophilic anammox" and "thermophilic anammox". The applied approach yielded a strong correlation between the measured and predicted SAA (R2 = 0.97) over the temperature range from 10 to 55 °C and over the low-temperature range from 10 to 15 °C (R2 = 0.99). Overall, the GTE could enhance the predictions of the temperature dependence of the anammox process kinetics. The GTE can help examine anammox-based bioaugmentation systems operating at both high temperatures (sidestream reactors) and low temperatures (mainstream reactors).
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Affiliation(s)
- D Sobotka
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland.
| | - J Zhai
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, School of Urban Construction and Environmental Engineering - Chongqing University, 400045 Chongqing, PR China
| | - J Makinia
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
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Ross L, Adams E, Parrish A, Zhai J, Chithriki M, Magner D, Johnson P. Coccygectomy a novel and definitive approach to surgical treatment of a tailgut cyst. Interdisciplinary Neurosurgery 2021. [DOI: 10.1016/j.inat.2021.101093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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11
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Heft Neal ME, Gensterblum-Miller E, Bhangale AD, Kulkarni A, Zhai J, Smith J, Brummel C, Foltin SK, Thomas D, Jiang H, McHugh JB, Brenner JC. Integrative sequencing discovers an ATF1-motif enriched molecular signature that differentiates hyalinizing clear cell carcinoma from mucoepidemoid carcinoma. Oral Oncol 2021; 117:105270. [PMID: 33827033 DOI: 10.1016/j.oraloncology.2021.105270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 03/16/2021] [Accepted: 03/20/2021] [Indexed: 12/27/2022]
Abstract
OBJECTIVES Salivary gland tumors are comprised of a diverse group of malignancies with widely varying prognoses. These cancers can be difficult to differentiate, especially in cases with limited potential for immunohistochemistry (IHC)-based characterization. Here, we sought to define the molecular profile of a rare salivary gland cancer called hyalinizing clear cell carcinoma (HCCC), and identify a molecular gene signature capable of distinguishing between HCCC and the histopathologically similar disease, mucoepidermoid carcinoma (MEC). MATERIALS AND METHODS We performed the first integrated full characterization of five independent HCCC cases. RESULTS We discovered insulin-like growth factor alterations and aberrant IGF2 and/or IGF1R expression in HCCC tumors, suggesting a potential dependence on this pathway. Further, we identified a 354 gene signature that differentiated HCCC from MEC, and was significantly enriched for genes with an ATF1 binding motif in their promoters, supporting a transcriptional pathogenic mechanism of the characteristic EWSR1-ATF1 fusion found in these tumors. Of the differentially expressed genes, IGF1R, SGK1 and SGK3 were found to be elevated in the HCCCs relative to MECs. Finally, analysis of immune checkpoints and subsequent IHC demonstrated that CXCR4 protein was elevated in several of the HCCC cases. CONCLUSION Collectively, our data identify an ATF1-motif enriched gene signature that may have clinical utility for molecular differentiation of HCCCs from other salivary gland tumors and discover potential actionable alterations that may benefit the clinical care of recurrent HCCC patients.
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Affiliation(s)
- M E Heft Neal
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - E Gensterblum-Miller
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - A D Bhangale
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - A Kulkarni
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - J Zhai
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI, United States
| | - J Smith
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - C Brummel
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - S K Foltin
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States
| | - D Thomas
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - H Jiang
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI, United States; Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, United States
| | - J B McHugh
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - J C Brenner
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, MI, United States; Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, United States; Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, United States.
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Shi X, Dong X, Zhai J, Liu X, Lu D, Ni Z, Chen A, Cai K. P58.01 Systematic Identification of Methylation Sites Associated with Lung Adenocarcinoma Prognosis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.949] [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: 10/21/2022]
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Shi X, Dong X, Zhai J, Liu X, Lu D, Ni Z, Chen A, Cai K. P66.02 A Novel Risk Model of Lung Adenocarcinoma Based on Lung Cancer Susceptibility Genes. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1001] [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: 10/21/2022]
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14
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Shi X, Dong X, Zhai J, Liu X, Lu D, Ni Z, Chen A, Cai K. P54.01 Development and Validation of a Novel Nomogram Integrated with Lung Cancer Susceptibility Genes for Squamous Cell Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.937] [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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Chen JM, Wan Q, Zhu HY, Ge YQ, Wu LL, Zhai J, Ding ZM. [The value of conventional magnetic resonance imaging based radiomic model in predicting the texture of pituitary macroadenoma]. Zhonghua Yi Xue Za Zhi 2020; 100:3626-3631. [PMID: 33333688 DOI: 10.3760/cma.j.cn112137-20200511-01511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the value of conventional magnetic resonance imaging (MRI) based radiomic model in predicting the texture of pituitary macroadenoma. Methods: The complete data of 101 patients with pituitary macroadenoma confirmed by surgery and pathology in Yijishan Hospital of Wannan Medical College from December 2014 to December 2019 were retrospectively analyzed. According to the texture of the intraoperative pituitary tumor, patients were divided into soft group (n=58) and hard group (n=43). They were randomly divided into training group (n=72) and validation group (n=29) at a ratio of 7∶3. All patients underwent conventional MRI scan of the pituitary gland. Itk-snap software was used to manually outline the T(1)-weighted image (T(1)WI), T(2)-weighted image (T(2)WI) and enhanced T(1)WI image section by section on tumor area of interest (ROI) and perform three-dimensional fusion. Then AK software was imported to extract texture features. The regression analysis methods of minimum redundancy maximum relevance (mRMR) and least absolute shrinkage and selection operator (LASSO) were used for feature selection and radiomic signature establishment. The reliability of the model was verified by 100 leave-group-out cross validation (LGOCV), and the predictive ability of the model was evaluated by drawing the receiver operating characteristic (ROC) curve. The decision curve analysis (DCA) was used to evaluate the clinical application value of the model. Results: The AUC (Area Under the ROC Curve) (95%CI) values of T1WI, T2WI, enhanced T1WI, and the combined sequence model to predict the texture of pituitary macroadenomas in the training and validation groups were 0.91 (0.84-0.98) and 0.90 (0.78-1.00), 0.86 (0.78-0.95) and 0.83 (0.64-1.00), 0.90 (0.83-0.97) and 0.89 (0.77-1.00),0.92 (0.85-0.98) and 0.91 (0.79-1.00), respectively. DCA demonstrated that T(1)WI, T(2)WI, enhanced T(1)WI, and combined sequence model all had good net benefits in clinical practice. Conclusions: T(1)WI, T(2)WI, enhanced T(1)WI, and combined sequence model of conventional MRI all had high efficacy in predicting the texture of pituitary macroadenoma, which provided a new quantitative method for predicting the texture of pituitary macroadenoma.
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Affiliation(s)
- J M Chen
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - Q Wan
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - H Y Zhu
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - Y Q Ge
- GE health care, Shanghai 200000, China
| | - L L Wu
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - J Zhai
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - Z M Ding
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
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Song Y, Liu W, Niu Y, Cisternas G, Huang F, Garcia-Vargas J, Childs B, Mehra A, Li T, Hiemeyer F, Zhai J, Reschke S, Granvil C, Zhu J. 260P A phase I study of copanlisib, a pan-class I phosphatidylinositol 3-kinase (PI3K) inhibitor, in Chinese patients with relapsed indolent non-Hodgkin lymphoma (iNHL). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Zhai J, Li H, Wong AHH, Dong C, Yi S, Jia Y, Mak PI, Deng C, Martins RP. A Novel and Robust Single-cell Trapping Method on Digital Microfluidics. Bio Protoc 2020; 10:e3769. [PMID: 33659427 PMCID: PMC7842684 DOI: 10.21769/bioprotoc.3769] [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] [Received: 05/24/2020] [Revised: 07/29/2020] [Accepted: 07/22/2020] [Indexed: 11/02/2022] Open
Abstract
Due to cell heterogeneity, the differences among individual cells are averaged out in bulk analysis methods, especially in the analysis of primary tumor biopsy samples from patients. To deeply understand the cell-to-cell variation in a primary tumor, single-cell culture and analysis with limited amount of cells are in high demand. Microfluidics has been an optimum platform to address the issue given its small reaction volume requirements. Digital microfluidics, which utilizes an electric signal to manipulate individual droplets has shown promise in cell-culture with easy controls. In this work, we realize single cell trapping on digital microfluidic platform by fabricating 3D microstructures on-chip to form semi-closed micro-wells. With this design, 20% of 30 x 30 array can be occupied by isolated single cells. We also use a low evaporation silicon oil and a fluorinated surfactant to lower the droplet actuation voltage and prevent the drop from evaporation, while allowing cell respiration during the long term of culture (24 h). The main steps for single cell trapping on digital microfluidics, as illustrated in this protocol, include 3D microstructures design, 3D microstructures construction on chip and oil film with surfactant for single cell trapping on chip.
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Affiliation(s)
- Jiao Zhai
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao SAR, China
| | - Haoran Li
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
| | - Ada Hang-Heng Wong
- Cancer Center, Faculty of Health Sciences, University of Macau, Macau, China
| | - Cheng Dong
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao SAR, China
| | - Shuhong Yi
- Liver Transplantation Center, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510000, China
| | - Yanwei Jia
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
- Cancer Center, Faculty of Health Sciences, University of Macau, Macau, China
| | - Pui-In Mak
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
| | - Chuxia Deng
- Cancer Center, Faculty of Health Sciences, University of Macau, Macau, China
| | - Rui P. Martins
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
- Instituto Superior Técnico, Universidade de Lisboa, Portugal
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Michmerhuizen NL, Owen JH, Heft Neal ME, Mann JE, Leonard E, Wang J, Zhai J, Jiang H, McHugh JB, Brenner JC, Prince MEP. Rationale for the advancement of PI3K pathway inhibitors for personalized chordoma therapy. J Neurooncol 2020; 147:25-35. [PMID: 32067197 DOI: 10.1007/s11060-020-03418-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/30/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE Chordomas are rare and serious tumors with few effective treatments outside of aggressive surgery and radiation. Targeted therapies may present a more effective option for a subset of patients with lesions possessing certain genetic biomarkers. METHODS A small molecule inhibitor library was tested in patient-derived UM-Chor1 cells to identify targeted therapies with potential efficacy. Targeted exome sequencing of UM-Chor1 and UM-Chor2 cells was performed to investigate genetic aberrations in relevant pathways. Chordoma cell lines were treated with inhibitors of the phosphotidylinositol 3-kinase (PI3K), epidermal growth factor receptor (EGFR), and cyclin dependent kinase (CDK) pathways, and responses were determined using resazurin cell viability assays, Annexin V apoptosis assays, and western blotting. Pan-PI3K inhibitor BKM120 was also tested in five chordoma xenograft models. RESULTS Unbiased small molecule profiling nominated PI3K-AKT-mTOR pathway inhibitors as a promising therapy in chordoma, and genetic analyses of UM-Chor1 and UM-Chor2 cell lines revealed aberrations in PTEN, EGFR, and CDKN2A. Treatment of UM-Chor1 and UM-Chor2 with targeted PI3K, EGFR, and CDK inhibitors inhibited growth and proliferation and induced apoptosis more robustly than imatinib, a currently used chordoma therapy. Furthermore, BKM120 significantly inhibited tumor growth in a subset of the xenograft models tested. CONCLUSION Targeted therapies, especially those inhibiting PI3K, display promising effects in multiple chordoma cell line and xenograft models. Nevertheless, the limited effects of PI3K, EGFR, and CDK targeting agents in other models reveal the presence of resistance mechanisms, which motivates future research to both identify biomarkers of response and develop combination therapies.
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Affiliation(s)
- N L Michmerhuizen
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - J H Owen
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA
| | - M E Heft Neal
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA
| | - J E Mann
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - E Leonard
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA
| | - J Wang
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - J Zhai
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - H Jiang
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI, USA
- Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, USA
| | - J B McHugh
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
- Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, USA
| | - J C Brenner
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA.
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA.
- Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, USA.
| | - M E P Prince
- Department of Otolaryngology - Head and Neck Surgery, University of Michigan Medical School, 1150 E. Medical Center Dr., 9301B MSRB3, Ann Arbor, MI, 48109-0602, USA
- Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI, USA
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He MF, Jiang ZW, Hao ZW, An J, Zhai J, Shen JK. [Diagnostic value of optical imaging combined with indocyanine green-guided sentinel lymph node biopsy in gastric cancer: a meta-analysis]. Zhonghua Wei Chang Wai Ke Za Zhi 2020; 22:1196-1204. [PMID: 31874538 DOI: 10.3760/cma.j.issn.1671-0274.2019.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To systematically evaluate the diagnostic value of optical imaging combined with indocyanine green (ICG)-guided sentinel lymph node (SLN) biopsy in gastric cancer, and to identify potential factors that would influence diagnostic accuracy. Methods: Study was carried out by searching the electronic database of PubMed, Embase, Medline, Web of Science, and the Cochrane Library with keywords as "gastric/stomach" and "cancer/carcinoma/tumor/tumour/adenocarcinoma/neoplasm" and "sentinel lymph node" and "near-infrared/NIR or fluorescent imaging" and "indocyanine green/ICG" . Literature inclusion criteria: (1) gastric cancer clinical stage was cT0-3; (2) clinical stage determined by at least 2 kinds of imaging modalities; (3) optical imaging (near-infrared or fluorescence imaging) combined with ICG-guided SLN biopsy; (4) prospective study to predict lymph node metastasis; (5) intraoperative or postoperative pathology for all lymph nodes removed; (6) patients number in the literature >10 cases. Exclusion criteria: (1) patients with a history of ICG allergy or chemoradiotherapy; (2) previous history of endoscopic mucosal resection or endoscopic submucosal dissection; (3) patients with a variety of gastrointestinal tumor; (4) case reports, conference abstracts, clinical guidelines, editorials, reviews, meta-analysis and correspondence letters; (5) in vitro or animal experiments; (6) insufficient diagnostic efficacy data. The meta-analysis was performed in the Stata12.0 software using the "bivariate mixed-effects model" combined with the "midas" command to pool the data. Information such as true positive value, false positive value, false negative value, and true negative value of each included articles were extracted. The literature quality assessment map was drawn to describe the overall quality of the articles; the heterogeneity analysis was performed with the forest map, with P<0.01 considered as statistical significance; the funnel plot was used to describe publication bias, with P<0.1 considered as statistically significant. Area under curve (AUC) of summary receiver operator characteristic (SROC) was used to describe the diagnostic accuracy and the AUC closer to 1 indicated higher diagnostic accuracy. If there was heterogeneity (I(2)>50%) among studies, regression analysis and subgroup analysis were performed. P<0.05 was considered as statistically significant. Results: A total of 15 studies (1020 patients) were included. The optical imaging contained near-infrared (NIR) and fluorescent imaging (FI). The diagnostic value of optical imaging combined with ICG-guided SLN biopsy in gastric cancer was as follows: the pooled sensitivity (Sen) was 0.95 (95% CI: 0.82 to 0.99), specificity (Spe) was 1.00 (95% CI: 0.92 to 1.00), positive likelihood ratio (PLR) was 30.39 (95% CI: 9.14 to 101.06), negative likelihood ratio (NLR) was 0.05 (95% CI:0.01 to 0.20), diagnostic odds ratio (DOR) was 225.54 (95% CI: 88.81 to 572.77), AUC was 1.00 (95% CI: 0.99 to 1.00), threshold value was sensitivity=0.95 (95% CI: 0.82 to 0.99) and specificity=1.00 (95% CI: 0.92 to 1.00). Deeks method revealed DOR funnel plot of SLN biopsy was not asymmetrical obviously with significant difference (P=0.01), which indicated remarkable publishing bias. Meta-subgroup analysis showed that compared to FI, NIR imaging had higher sensitivity (0.98 vs. 0.73); compared to 0 minutes, optical imaging performed 20 minutes after ICG injection had higher sensitivity (0.98 vs. 0.70); compared to mean detected number of SLN of 4, mean detected number≥4 had higher sensitivity (0.96 vs. 0.68); compared to HE stain, immunohistochemistry + HE had higher sensitivity (0.99 vs. 0.84); compared to subserous injection of ICG, submucosa injection of ICG had higher sensitivity (0.98 vs. 0.40); compared to injection of 5 g/L ICG, 0.5 g/L and 0.05 g/L had higher sensitivity (0.98 vs. 0.83); compared to cT2-3 tumor, early stage (cT1) tumor had higher sensitivity (0.96 vs. 0.72); compared to ≤ enrolled 26 cases in the study, > 26 cases had higher sensitivity (0.96 vs. 0.65); compared to papers before 2010, papers after 2010 had higher sensitivity (0.97 vs. 0.81); whose differences were all significant. Sensitivity differences between mean tumor diameter of ≤30 cm and >30 cm, open surgery and laparoscopic surgery, lymph node regional dissection and retrieved dissection were not significant (all P>0.05). Conclusions: Optical imaging combined with ICG-guided SLN biopsy is clinically feasible, and especially suitable for early gastric cancer. However, the ICG being used in current studies may be overdosed. Higher sensitivity may be achieved from NIR imaging when compared with FI method.
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Affiliation(s)
- M F He
- Department of Graduate School, Chengde Medical University, Hebei Chengde 067000, China
| | - Z W Jiang
- The Second Department of General Surgery, Baoding First Central Hospital, Hebei Baoding 071000, China
| | - Z W Hao
- The Second Department of General Surgery, Baoding First Central Hospital, Hebei Baoding 071000, China
| | - J An
- The Second Department of General Surgery, Baoding First Central Hospital, Hebei Baoding 071000, China
| | - J Zhai
- The Second Department of General Surgery, Baoding First Central Hospital, Hebei Baoding 071000, China
| | - J K Shen
- The Second Department of General Surgery, Baoding First Central Hospital, Hebei Baoding 071000, China
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Xu C, Zhai J, Fu Y. LncRNA CDKN2B-AS1 promotes the progression of ovarian cancer by miR-143-3p/SMAD3 axis and predicts a poor prognosis. Neoplasma 2020; 67:782-793. [DOI: 10.4149/neo_2020_190617n515] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 10/08/2019] [Indexed: 11/08/2022]
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Zhai J, Li H, Wong AHH, Dong C, Yi S, Jia Y, Mak PI, Deng CX, Martins RP. A digital microfluidic system with 3D microstructures for single-cell culture. Microsyst Nanoeng 2020; 6:6. [PMID: 34567621 PMCID: PMC8433300 DOI: 10.1038/s41378-019-0109-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 08/12/2019] [Accepted: 09/30/2019] [Indexed: 05/12/2023]
Abstract
Despite the precise controllability of droplet samples in digital microfluidic (DMF) systems, their capability in isolating single cells for long-time culture is still limited: typically, only a few cells can be captured on an electrode. Although fabricating small-sized hydrophilic micropatches on an electrode aids single-cell capture, the actuation voltage for droplet transportation has to be significantly raised, resulting in a shorter lifetime for the DMF chip and a larger risk of damaging the cells. In this work, a DMF system with 3D microstructures engineered on-chip is proposed to form semi-closed micro-wells for efficient single-cell isolation and long-time culture. Our optimum results showed that approximately 20% of the micro-wells over a 30 × 30 array were occupied by isolated single cells. In addition, low-evaporation-temperature oil and surfactant aided the system in achieving a low droplet actuation voltage of 36V, which was 4 times lower than the typical 150 V, minimizing the potential damage to the cells in the droplets and to the DMF chip. To exemplify the technological advances, drug sensitivity tests were run in our DMF system to investigate the cell response of breast cancer cells (MDA-MB-231) and breast normal cells (MCF-10A) to a widely used chemotherapeutic drug, Cisplatin (Cis). The results on-chip were consistent with those screened in conventional 96-well plates. This novel, simple and robust single-cell trapping method has great potential in biological research at the single cell level.
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Affiliation(s)
- Jiao Zhai
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau SAR, China
| | - Haoran Li
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
| | - Ada Hang-Heng Wong
- Cancer Center, Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Cheng Dong
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau SAR, China
| | - Shuhong Yi
- Liver Transplantation Center, the Third Affiliated Hospital, Sun Yat-sen University, 510000 Guangzhou, China
| | - Yanwei Jia
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
- Cancer Center, Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Pui-In Mak
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
| | - Chu-Xia Deng
- Cancer Center, Faculty of Health Sciences, University of Macau, Macau SAR, China
| | - Rui P. Martins
- State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau SAR, China
- Faculty of Science and Technology-ECE, University of Macau, Macau SAR, China
- on leave from Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
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Li J, Wu B, Wang Y, Sun YP, Liu D, Zhai J, Lai H, Sun YX, Wang C. P6499Genetic screening in 109 adult Chinese patients with thoracic aortic aneurysm and dissection. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.1089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Thoracic aortic aneurysm and dissection (TAAD) comprises a heterogenous group of cardiovascular urgencies, which could be further categorized into syndromic and non-syndromic entities. The accurate and timely identification of culprit genetic variants is of grave importance for TAAD patients, since different genetic defects have been associated with different risks for aortic dissection, thus different thresholds for preventive aortic intervention.
Purpose
With the advent of next-generation sequencing (NGS) techniques, accumulating records of rare variants have been found in TAAD patients, while inadequate functional validation also makes it difficult to give proper counsel for individual TAAD patients. Therefore, it is necessary for us to start re-evaluating clinical applications of genetic screening strategies in specific patient populations.
Methods
From June 2016 to July 2017, genetic screening using an NGS-based panel of 18 candidate genes (FBN1, FBN2, TGFBR1, TGFBR2, TGFB2, TGFB3, SMAD3, COL1A1, COL3A1, COL5A2, COL5A1, PLOD1, ACTA2, MYH11, MYLK, PRKG1, MFAP5, and SKI) was applied in 109 adult TAAD patients from our institution. Patients with bicuspid aortic valve disease, complex congenital cardiac defect, aortic root infection, aortitis, pregnancy, and an age older than 70 years were excluded from the present study.
Results
Among 109 TAAD patients, 36 harboured an FBN1 variant, including 2 splicing site, 6 frame shift, 5 non-sense, and 23 mis-sense variants. The pathogenicity of mis-sense variants was further categorized into 10 disease-causing variants via database survey, 5 disease-causing variants via family survey, and 8 variants of uncertain significance (VUS). On the other hand, 25 patients harboured a non-FBN1 variant, including 3 established pathogenic variants on TGFBR1, TGFB2, and ACTA2 genes, as well as 22 VUS. Patients with an FBN1 variant displayed younger age, lower rate of hypertension, higher rate of aortic root aneurysm, and more frequent mitral valve prolapse, while an extreme male predominance (24/25) was observed in patients with a non-FBN1 variant.
Conclusion
In an adult Chinese TAAD cohort, disease-causing genetic variants were found in 28.4% (31/109) of patients, with FBN1 mutations still being the single leading cause of disease. The present study advocated a genetic screening strategy emphasizing the detection of FBN1 mutations in adult Chinese TAAD patients, and further studies should address the pathogenicity and clinical relevance of non-FBN1 VUS in TAAD patients.
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Affiliation(s)
- J Li
- Zhongshan Hospital, Fudan University, Department of Cardiac Surgery, Shanghai, China
| | - B Wu
- Fudan Univerisity, Zhongshan Hospital-Department of Transfusion, Shanghai, China
| | - Y Wang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital-Fudan Univerisity, Shanghai, China
| | - Y P Sun
- Zhongshan Hospital, Fudan University, Department of Cardiac Surgery, Shanghai, China
| | - D Liu
- Zhongshan Hospital, Fudan University, Department of Cardiac Surgery, Shanghai, China
| | - J Zhai
- Zhongshan Hospital, Fudan University, Department of Cardiac Surgery, Shanghai, China
| | - H Lai
- Zhongshan Hospital, Fudan University, Department of Cardiac Surgery, Shanghai, China
| | - Y X Sun
- Zhongshan Hospital, Fudan University, Department of Cardiac Surgery, Shanghai, China
| | - C Wang
- Zhongshan Hospital, Fudan University, Department of Cardiac Surgery, Shanghai, China
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Wang XY, Wang JT, Guo T, Kong XY, Chen L, Zhai J, Gao YQ, Fang Y, Wang J. Risk factors and a predictive nomogram for non-sentinel lymph node metastases in Chinese breast cancer patients with one or two sentinel lymph node macrometastases and mastectomy. ACTA ACUST UNITED AC 2019; 26:e210-e215. [PMID: 31043829 DOI: 10.3747/co.26.4295] [Citation(s) in RCA: 10] [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] [Indexed: 01/31/2023]
Abstract
Background Two ongoing prospective randomized trials are evaluating whether omitting axillary lymph node dissection (alnd) in patients with breast cancer (bca) and sentinel lymph node (sln) macrometastases undergoing mastectomy is safe. Determining predictive risk factors for non-sln metastases and developing a model to predict the probability of those patients having non-sln metastases is also important. Methods This retrospective study enrolled 396 patients with bca and 1-2 slns with macrometastases who underwent alnd and mastectomy between January 2012 and December 2016. Factors influencing the non-sln metastases were determined, and a predictive nomogram was formulated. Performance of the nomogram was evaluated by its area under the curve (auc). Results We developed a predictive nomogram with an auc of 0.81 (cross-validation 95% confidence interval: 0.75 to 0.86) that included 4 factors (tumour size, histologic grade, and number of negative slns and axillary lymph nodes on imaging). Conclusions Our predictive nomogram assesses the risk of non-sln metastases in patients with bca and 1-2 sln macrometastases undergoing mastectomy.
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Affiliation(s)
- X Y Wang
- Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R.C
| | - J T Wang
- Department of Biostatistics, School of Public Health, Shandong University, Shandong, P.R.C
| | - T Guo
- Department of Breast Surgery, The First Hospital of Qiqihar, Qiqihar, P.R.C
| | - X Y Kong
- Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R.C
| | - L Chen
- Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R.C
| | - J Zhai
- Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R.C
| | - Y Q Gao
- Department of Oncology, Beijing Electric Power Hospital, Capital Medical University, Beijing, P.R.C
| | - Y Fang
- Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R.C
| | - J Wang
- Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R.C
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Fang T, Lu D, Liu X, Feng S, Dong X, Shi X, Zhai J, Cai K. ESTABLISHMENT AND MEANING OF ESOPHAGEAL SQUAMOUS CELL CARCINOMA CELL LINES OF KNOCKDOWN AND OVEREXPRESSION DEMETHYLASE ALKBH5 GENERATED BY LENTIVIRUS. Chest 2019. [DOI: 10.1016/j.chest.2019.02.042] [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] Open
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25
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Zhao ZQ, Zhai J. [A meta-analysis of prognosis after bipolar umbilical cord coagulation or radiofrequency ablation to reduce complicated monochorionic multiple pregnancies]. Zhonghua Yi Xue Za Zhi 2018; 98:2832-2837. [PMID: 30248788 DOI: 10.3760/cma.j.issn.0376-2491.2018.35.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the prognosis and complications after reduction of monochorionic multifetal pregnancies using bipolar umbilical cord coagulation (BCC) or radiofrequency ablation (RFA). Methods: A literature search were performed by using online databases including PubMed, Embase, and COCHRANE.The publications that described prognosis and complications after selective reduction of monochorionic twin pregnancies using either BCC or RFA for studies with clear outcome data were identified. Results: We identified five retrospective cohort studies for the meta-analysis and 231 cases of BCC and 174 cases of RFA.There was no statistical difference in overall survival after reduction between BCC group (79.2%) and RFA groups (76.4%) (RR=0.96; 95%CI: 0.86~1.08; P=0.48). Neonatal mortality was similar in both groups (8.2% vs 11.1%, respectively; RR=1.34; 95%CI: 0.60~2.99; P=0.48). However, intrauterine fetal death (IUFD) in the RFA group was 13.6%, and it significantly higher than that in the BCC group 7.7% (RR=2.15; 95%CI: 1.10~4.21; P=0.03). In contrast, after reduction, those in the RFA group had less preterm premature rupture of membranes (PPROM) compared with the BCC group (17.1% vs 27.5%, RR=0.58; 95%CI: 0.39~0.86; P=0.007). Conclusions: RFA and BCC groups have similar overall survival for complicated monochromic multiple pregnancies, but RFA was more prone to IUFD, and BCC tended to have more PPROM.Thus, procedures should be chosen according to specific clinical situations and pregnancy conditions.
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Affiliation(s)
- Z Q Zhao
- Center for Reproductive Medicine, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
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Zhai J, Wang J, Chang Z, Ma L. Metformin regulates key micrornas to increase implantation marker gene expression in the uterus of PCOS patients. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zhai J, Jia Y, Zhao L, Yuan Q, Gao F, Zhang X, Cai P, Gao L, Guo J, Yi S, Chai Z, Zhao Y, Gao X. Turning On/Off the Anti-Tumor Effect of the Au Cluster via Atomically Controlling Its Molecular Size. ACS Nano 2018; 12:4378-4386. [PMID: 29667812 DOI: 10.1021/acsnano.8b00027] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We reported two Au clusters with precisely controlled molecular size (Au5Peptide3 and Au22Peptide10) showing different antitumor effects. In vitro, both Au5Peptide3 and Au22Peptide10 were well taken up by human nasopharyngeal cancer cells (CNE1 cells). However, only Au5Peptide3 significantly induced CNE1 cell apoptosis. Further studies showed that CNE1 cells took up Au5Peptide3 (1.98 × 10-15 mol/cell), and 9% of them entered mitochondria (0.186 × 10-15 mol/cell). As a comparison, the uptake of Au22Peptide10 was only half the amount of Au5Peptide3 (1.11 × 10-15 mol/cell), and only 1% of them entered mitochondria (0.016 × 10-15 mol/cell). That gave 11.6-fold more Au5Peptide3 in mitochondria of CNE1 cells than Au22Peptide10. Further cell studies revealed that the antitumor effect may be due to the enrichment of Au5Peptide3 in mitochondria. Au5Peptide3 slightly decreased the Mcl-1 (antiapoptotic protein of mitochondria) and significantly increased the Puma (pro-apoptotic protein of mitochondria) expression level in CNE1 cells, which resulted in mitochondrial transmembrane potential change and triggered the caspase 9-caspase 3-PARP pathway to induce CNE1 cell apoptosis. In vivo, CNE1 tumor growth was significantly suppressed by Au5Peptide3 in the xenograft model after 3 weeks of intraperitoneal injection. The TUNEL and immuno-histochemical studies of tumor tissue verified that CNE1 cell apoptosis was mainly via the Puma and Mcl-1 apoptosis pathway in the xenograft model, which matched the aforementioned CNE1 cell studies in vitro. The discovery of Au5 but not Au22 suppressing tumor growth via the mitochondria target was a breakthrough in the nanomedical field, as this provided a robust approach to turn on/off the nanoparticles' medical properties via atomically controlling their sizes.
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Affiliation(s)
- Jiao Zhai
- State Key Laboratory of Analog and Mixed Signal VLSI , University of Macau , Macao , SAR, China
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Yanwei Jia
- State Key Laboratory of Analog and Mixed Signal VLSI , University of Macau , Macao , SAR, China
| | - Lina Zhao
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Qing Yuan
- Department of Chemistry and Chemical Engineering , Beijing University of Technology , Beijing 100124 , China
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Fuping Gao
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Xiangchun Zhang
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Pengju Cai
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Liang Gao
- Department of Chemistry and Chemical Engineering , Beijing University of Technology , Beijing 100124 , China
| | - Juanjuan Guo
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Shuhong Yi
- Liver Transplantation Center, the Third Affiliated Hospital , Sun Yat-sen University , Guangzhou 510000 , China
| | - Zhifang Chai
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Yuliang Zhao
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Xueyun Gao
- Department of Chemistry and Chemical Engineering , Beijing University of Technology , Beijing 100124 , China
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
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Zhang P, Zhai J, Gao X, Zhao H, Su W, Zhao L. Targeted peptide-Au cluster binds to epidermal growth factor receptor (EGFR) in both active and inactive states: a clue for cancer inhibition through dual pathways. Sci Bull (Beijing) 2018; 63:349-355. [PMID: 36658871 DOI: 10.1016/j.scib.2018.02.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/13/2018] [Accepted: 01/18/2018] [Indexed: 01/21/2023]
Abstract
The epidermal growth factor receptor (EGFR) has become an important target protein in anticancer drug development. Meanwhile, peptide-Au cluster has been proposed as potential targeted nano-drug assembled by targeting peptide. Here, we designed and synthesized a novel peptide-Au cluster as Au10Peptide5 to target to EGFR. We found Au10Peptide5 could target to the natural binding sites of all EGFRs at membrane in both active and inactive states by molecular simulations. Its targeted ability was further verified by the co-localization and blocking experiments. We also study the configuration modifications of both active and inactive EGFRs after binding by Au10Peptide5. For active EGFR, the absorbed Au10Peptide5 might replace the natural ligand in EGFR endocytosis process. Then, the peptide-Au cluster in endochylema could inhibit the cancer relating enzyme activity including thioredoxin reductase1 (TrxR1) and induce the oxidative stress mediated apoptosis in tumor cells. For inactive EGFR, it was retained in inactive state by Au10Peptide5 binding to inhibit dimerization of EGFR for anticancer. Both pathways might be applied in anticancer drug development based on the theoretical and experimental study here.
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Affiliation(s)
- Peng Zhang
- School of Physics, Beijing Institute of Technology, Beijing 100081, China; Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jiao Zhai
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Xueyun Gao
- Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing 100124, China
| | - Hongkang Zhao
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Wenyong Su
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Lina Zhao
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
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Bian YY, Wu H, Huang Z, Zhai J, Liu Y, Weng XS. Surgical treatment of a giant iliopsoas haemophilic pseudotumour with adjacent structure compressions: A case report. Haemophilia 2017; 23:e507-e512. [PMID: 28869681 DOI: 10.1111/hae.13299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Y Y Bian
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing, China
| | - H Wu
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing, China
| | - Z Huang
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing, China
| | - J Zhai
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing, China
| | - Y Liu
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing, China
| | - X S Weng
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Beijing, China
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Wang JY, Zhai J. [Systematic evaluation of the influence of endometrial stimulation on pregnancy outcome in the patients with artificial insemination]. Zhonghua Yi Xue Za Zhi 2017; 96:3680-3685. [PMID: 27978907 DOI: 10.3760/cma.j.issn.0376-2491.2016.45.015] [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: The association between endometrial stimulation and the intrauterine insemination outcome remains to be a controversial issue, for there being all kinds of conflicting data in the existing literatures. We conducted a Meta-analysis case to verify the relations between endometrial stimulation and intrauterine insemination (IUI). Methods: The articles had been searched in the following online databases: MEDLINE, CNKI, VIP, Wan Fang, EMBASE and the Cochrane Library. All of the statistics quoted for our studies have been published in English or Chinese from Jan, 2000 to May, 2016. Among the 6 studies included in this Meta-analysis, all of them used a case - control design. All the 6 studies evaluated a total of 1349 participants, including 734 cases of endometrial injury. Results: The results of the Meta-analysis showed that patients with endometrial stimulation were more likely to receive clinical pregnancy than those who did not. Compared with the control group, the clinical pregnancy rate of experiment group was higher (RR=0.88, 95% CI: 0.82-0.95, P=0.001), while the differences between their abortion rate (RR=0.72, 95% CI: 0.37-1.4, P=0.33) and multiple pregnancies rate (RR=0.78, 95% CI: 0.3-2.01, P=0.60) were insignificant. Conclusions: Endometrial stimulation could help increase the pregnancy rate in IUI cycles, while the abortion rate and multiple pregnancies rate would not be raised.
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Affiliation(s)
- J Y Wang
- Reproductive Medicine Department, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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Zhai J, Zhao L, Zheng L, Gao F, Gao L, Liu R, Wang Y, Gao X. Peptide-Au Cluster Probe: Precisely Detecting Epidermal Growth Factor Receptor of Three Tumor Cell Lines at a Single-Cell Level. ACS Omega 2017; 2:276-282. [PMID: 30023515 PMCID: PMC6044707 DOI: 10.1021/acsomega.6b00390] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 01/10/2017] [Indexed: 05/29/2023]
Abstract
Alterations in protein (e.g., biomarkers) expression levels have a significant correlation with tumor development and prognosis; therefore, it is desired to develop precise methods to differentiate the expression level of proteins in tumor cell lines, especially at the single-cell level. Here, we report a precise and versatile approach of quantifying the protein expression levels of three tumor cell lines in situ using a peptide-Au cluster probe. The probe (Au5Peptide3) consists of a peptide with a specific cell membrane epidermal growth factor receptor (EGFR) targeting ability and an Au cluster for both cell membrane EGFR imaging using confocal microscopy and cell membrane EGFR counting by laser ablation inductively coupled plasma mass spectrometry. Utilizing the peptide-Au cluster probe, we successfully quantify the EGFR expression levels of SMMC-7721, KB, and HeLa cells at a single-cell level and differentiate the EGFR expression levels among these cell lines. The peptide-Au cluster probe, with the ability to differentiate the protein expression level of different cell lines, shows exceptional promise for providing reliable predictive and prognostic information of tumors at a single-cell level.
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Affiliation(s)
- Jiao Zhai
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
| | - Lina Zhao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
| | - Lingna Zheng
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
| | - Fuping Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
| | - Liang Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
| | - Ru Liu
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
| | - Yaling Wang
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
| | - Xueyun Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy
of Sciences, Beijing 100049, China
- Department
of Chemistry and Chemical Engineering, Beijing
University of Technology, Beijing 100124, China
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Sun D, Yao G, Wu L, Wang J, Zhao Z, Zhai J. The effect of metformin on pregnancy outcome, endometrial receptivity & miRNAs in endometrium of patients with PCOS undergoing IVF/ICSI. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.749] [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: 10/21/2022]
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Schreiber E, Berosik S, Wenz M, Chang S, Jackson S, Zhai J, Schneider S, Brzoska P. Confirming variants discovered by Next Generation Sequencing (NGS) with Sanger sequencing using innovative bioinformatics tools. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61054-7] [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: 10/21/2022]
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Wang H, Li X, Gao L, Zhai J, Liu R, Gao X, Wang D, Zhao L. Atomic structure of a peptide coated gold nanocluster identified using theoretical and experimental studies. Nanoscale 2016; 8:11454-11460. [PMID: 27193193 DOI: 10.1039/c5nr08727a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Peptide coated gold nanoclusters (AuNCs) have a precise molecular formula and atomic structure, which are critical for their unique applications in targeting specific proteins either for protein analysis or drug design. To date, a study of the crystal structure of peptide coated AuNCs is absent primarily due to the difficulty of obtaining their crystalline phases in an experiment. Here we study a typical peptide coated AuNC (Au24Peptide8, Peptide = H2N-CCYKKKKQAGDV-COOH, Anal. Chem., 2015, 87, 2546) to figure out its atomic structure and electronic structure using a theoretical method for the first time. In this work, we identify the explicit configuration of the essential structure of Au24Peptide8, Au24(Cys-Cys)8, using density functional theory (DFT) computations and optical spectroscopic experiments, where Cys denotes cysteine without H bonded to S. As the first multidentate ligand binding AuNC, Au24(Cys-Cys)8 is characterized as a distorted Au13 core with Oh symmetry covered by two Au(Cys-Cys) and three Au3(Cys-Cys)2 staple motifs in its atomic structure. The most stable configuration of Au24(Cys-Cys)8 is confirmed by comparing its UV-vis absorption spectrum from time-dependent density-functional theory (TDDFT) calculations with optical absorption measurements, and these results are consistent with each other. Furthermore, we carry out frontier molecular orbital (FMO) calculations to elucidate that the electronic structure of Au24(Cys-Cys)8 is different from that of Au24(SR)20 as they have a different Au/S ratio, where SR represents alkylthiolate. Importantly, the different ligand coatings, Cys-Cys and SR, in Au24(Cys-Cys)8 and Au24(SR)20 cause the different Au/S ratios in the coated Au24. The reason is that the Au/S ratio is crucial in determining the size of the Au core of the ligand protected AuNC, and the size of the Au core corresponds to a specific electronic structure. By the adjustment of ligand coatings from alkylthiolate to peptide, the Au/S ratio could be controlled to generate different AuNCs with versatile electronic structures, optical properties and reaction stabilities. Therefore, we propose a universal approach to obtain a specific Au/S ratio of ligand coated AuNCs by adjusting the ligand composition, thus controlling the chemicophysical properties of AuNCs with ultimately the same number of Au atoms.
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Affiliation(s)
- Hui Wang
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Xu Li
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China. and Department of Mechanical and Electrical Engineering, North China Institute of Science and Technology, Hebei 065201, China
| | - Liang Gao
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jiao Zhai
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Ru Liu
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Xueyun Gao
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Dongqi Wang
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Lina Zhao
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
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Boccitto M, Doshi S, Newton IP, Nathke I, Neve R, Dong F, Mao Y, Zhai J, Zhang L, Kalb R. Opposing actions of the synapse-associated protein of 97-kDa molecular weight (SAP97) and Disrupted in Schizophrenia 1 (DISC1) on Wnt/β-catenin signaling. Neuroscience 2016; 326:22-30. [PMID: 27026592 DOI: 10.1016/j.neuroscience.2016.03.048] [Citation(s) in RCA: 7] [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] [Received: 05/14/2014] [Revised: 02/29/2016] [Accepted: 03/21/2016] [Indexed: 11/28/2022]
Abstract
It has been suggested that synapse-associated protein of 97-kDa molecular weight (SAP97) is a susceptibility factor for childhood and adult neuropsychiatric disorders. SAP97 is a scaffolding protein that shares direct and indirect binding partners with the Disrupted in Schizophrenia 1 (DISC1) gene product, a gene with strong association with neuropsychiatric disorders. Here we investigated the possibility that these two proteins converge upon a common molecular pathway. Since DISC1 modifies Wnt/β-catenin signaling via changes in glycogen synthase kinase 3 beta (GSK3β) phosphorylation, we asked if SAP97 impacts Wnt/β-catenin signaling and GSK3β phosphorylation. We find that SAP97 acts as inhibitor of Wnt signaling activity and can suppress the stimulatory effects of DISC1 on β-catenin transcriptional activity. Reductions in SAP97 abundance also decrease GSK3β phosphorylation. In addition, we find that over expression of DISC1 leads to an increase in the abundance of SAP97, by inhibiting its proteasomal degradation. Our findings suggest that SAP97 and DISC1 contribute to maintaining Wnt/β-catenin signaling activity within a homeostatic range by regulating GSK3β phosphorylation.
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Affiliation(s)
- M Boccitto
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, Room 814, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA; Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - S Doshi
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, Room 814, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA; Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - I P Newton
- Cell & Developmental Biology, School of Life Sciences, University of Dundee, Dundee, DD15EH, UK
| | - I Nathke
- Cell & Developmental Biology, School of Life Sciences, University of Dundee, Dundee, DD15EH, UK
| | - R Neve
- Department of Brain and Cognitive Sciences, McGovern Institute for Brain Research at the Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - F Dong
- Department of Biology, Penn State University, 214 Life Sciences Building, University Park, PA 16802, USA
| | - Y Mao
- Department of Biology, Penn State University, 214 Life Sciences Building, University Park, PA 16802, USA
| | - J Zhai
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, Room 814, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - L Zhang
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, Room 814, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - R Kalb
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, Room 814, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA; Department of Neurology, Perelman School of Medicine University of Pennsylvania, Philadelphia, PA 19104, USA
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Zhao L, Zhai J, Zhang X, Gao X, Fang X, Li J. Computational design of peptide-Au cluster probe for sensitive detection of α(IIb)β3 integrin. Nanoscale 2016; 8:4203-4208. [PMID: 26831577 DOI: 10.1039/c5nr09175f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We have designed a novel peptide-Au cluster probe to specifically bind to αIIbβ3 integrin. As indicated by molecular dynamics (MD) simulations, the binding mode of the native ligand of αIIbβ3 integrin, γC peptide, can be realized by the designed probe. More importantly, the peptide-Au probe can provide multiple coating peptides to form additional salt bridges with protein, and the binding stability of the probe is comparable to the native ligand. The designed probe was then successfully synthesized. The specific binding in a cellular environment was validated by colocalization analysis of confocal microscopy. In addition, the binding affinity was confirmed by atomic force microscopy (AFM) based single molecule force spectroscopy. Our results suggest the combination of computational design and experimental verification can be a useful strategy for the development of nanoprobes.
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Affiliation(s)
- Lina Zhao
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jiao Zhai
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Xuejie Zhang
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China. and Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Xueyun Gao
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
| | - Xiaohong Fang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Jingyuan Li
- Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
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37
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Gao L, Liu M, Ma G, Wang Y, Zhao L, Yuan Q, Gao F, Liu R, Zhai J, Chai Z, Zhao Y, Gao X. Peptide-Conjugated Gold Nanoprobe: Intrinsic Nanozyme-Linked Immunsorbant Assay of Integrin Expression Level on Cell Membrane. ACS Nano 2015; 9:10979-90. [PMID: 26434981 DOI: 10.1021/acsnano.5b04261] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Precisely quantifying the membrane protein expression level on cell surfaces is of vital importance for early cancer diagnosis and efficient treatment. We demonstrate that gold nanoparticle bioconjugated by a rationally designed peptide as nanoprobe possesses selective labeling and accurate quantification capacity of integrin GPIIb/IIIa on the human erythroleukemia cell line. Through selective recognition and marking of integrin, two-photon photoluminescence of the nanoprobe is exploited for direct observation of protein spatial distribution on cell membrane. More importantly, utilizing intrinsic enzyme-like catalysis property of the nanoprobe, the expression level of integrin on human erythroleukemia cells can be quantitatively counted in an amplified and reliable colorimetric assay without cell lysis and protein extraction process. In addition, the analysis of the correlation between the gold nanoparticle and the membrane protein via relevant inductively coupled plasma mass spectrometry measurement verifies the reliability of the new analytical method. It is anticipated that this facile and efficient strategy holds a great promise for a rapid, precise, and reliable quantification of interested functional membrane proteins on the cell surface.
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Affiliation(s)
- Liang Gao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Meiqing Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Guifu Ma
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Yaling Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Lina Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Qing Yuan
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Fuping Gao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Ru Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Jiao Zhai
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Zhifang Chai
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Yuliang Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
| | - Xueyun Gao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, China
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Hong H, Xiao H, Yuan H, Zhai J, Huang X. Cloning and characterisation of JAZ gene family in Hevea brasiliensis. Plant Biol (Stuttg) 2015; 17:618-24. [PMID: 25399518 DOI: 10.1111/plb.12288] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 06/08/2014] [Accepted: 11/10/2014] [Indexed: 05/11/2023]
Abstract
Mechanical wounding or treatment with exogenous jasmonates (JA) induces differentiation of the laticifer in Hevea brasiliensis. JA is a key signal for latex biosynthesis and wounding response in the rubber tree. Identification of JAZ (jasmonate ZIM-domain) family of proteins that repress JA responses has facilitated rapid progress in understanding how this lipid-derived hormone controls gene expression and related physiological processes in plants. In this work, the full-length cDNAs of six JAZ genes were cloned from H. brasiliensis (termed HbJAZ). These HbJAZ have different lengths and sequence diversity, but all of them contain Jas and ZIM domains, and two of them contain an ERF-associated amphiphilic repression (EAR) motif in the N-terminal. Real-time RT-PCR analyses revealed that HbJAZ have different expression patterns and tissue specificity. Four HbJAZ were up-regulated, one was down-regulated, while two were less effected by rubber tapping treatment, suggesting that they might play distinct roles in the wounding response. A yeast two-hybrid assay revealed that HbJAZ proteins interact with each other to form homologous or heterogeneous dimer complexes, indicating that the HbJAZ proteins may expand their function through diverse JAZ-JAZ interactions. This work lays a foundation for identification of the JA signalling pathway and molecular mechanisms of latex biosynthesis in rubber trees.
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Affiliation(s)
- H Hong
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University, Haikou, China
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Zhang L, Hsu FC, Mojsilovic-Petrovic J, Jablonski AM, Zhai J, Coulter DA, Kalb RG. Structure-function analysis of SAP97, a modular scaffolding protein that drives dendrite growth. Mol Cell Neurosci 2015; 65:31-44. [PMID: 25701814 DOI: 10.1016/j.mcn.2015.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 02/10/2015] [Accepted: 02/17/2015] [Indexed: 10/24/2022] Open
Abstract
Activation of AMPA receptors assembled with the GluA1 subunit can promote dendrite growth in a manner that depends on its direct binding partner, SAP97. SAP97 is a modular scaffolding protein that has at least seven recognizable protein-protein interaction domains. Several complementary approaches were employed to show that the dendrite branching promoting action of full length SAP97 depends on ligand(s) that bind to the PDZ3 domain. Ligand(s) to PDZ1, PDZ2 and I3 domains also contribute to dendrite growth. The ability of PDZ3 ligand(s) to promote dendrite growth depends on localization at the plasma membrane along with GluA1 and SAP97. These results suggest that the assembly of a multi-protein complex at or near synapses is vital for the translation of AMPA-R activity into dendrite growth.
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Affiliation(s)
- L Zhang
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Philadelphia, PA 19104, United States.
| | - F-C Hsu
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Philadelphia, PA 19104, United States.
| | - J Mojsilovic-Petrovic
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Philadelphia, PA 19104, United States.
| | - A M Jablonski
- Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, United States.
| | - J Zhai
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Philadelphia, PA 19104, United States.
| | - D A Coulter
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Philadelphia, PA 19104, United States; Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, United States; Department of Neurology, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, United States.
| | - R G Kalb
- Department of Pediatrics, Division of Neurology, Research Institute, Children's Hospital of Philadelphia, 3615 Civic Center Boulevard, Philadelphia, PA 19104, United States; Department of Neurology, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, United States.
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40
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Zhai J, Wang Y, Xu C, Zheng L, Wang M, Feng W, Gao L, Zhao L, Liu R, Gao F, Zhao Y, Chai Z, Gao X. Facile Approach To Observe and Quantify the αIIbβ3 Integrin on a Single-Cell. Anal Chem 2015; 87:2546-9. [DOI: 10.1021/ac504639u] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jiao Zhai
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yaling Wang
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Chao Xu
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- College
of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China
| | - Lingna Zheng
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Meng Wang
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Weiyue Feng
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Liang Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Lina Zhao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Ru Liu
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Fuping Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuliang Zhao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhifang Chai
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- School
of Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, Jiangsu 215123, China
| | - Xueyun Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
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41
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Cantó-Pastor A, Mollá-Morales A, Ernst E, Dahl W, Zhai J, Yan Y, Meyers BC, Shanklin J, Martienssen R. Efficient transformation and artificial miRNA gene silencing in Lemna minor. Plant Biol (Stuttg) 2015; 17 Suppl 1:59-65. [PMID: 24989135 PMCID: PMC4458260 DOI: 10.1111/plb.12215] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 04/19/2014] [Indexed: 05/21/2023]
Abstract
Despite rapid doubling time, simple architecture and ease of metabolic labelling, a lack of genetic tools in the Lemnaceae (duckweed) has impeded the full implementation of this organism as a model for biological research. Here, we present technologies to facilitate high-throughput genetic studies in duckweed. We developed a fast and efficient method for producing Lemna minor stable transgenic fronds via Agrobacterium-mediated transformation and regeneration from tissue culture. Additionally, we engineered an artificial microRNA (amiRNA) gene silencing system. We identified a Lemna gibba endogenous miR166 precursor and used it as a backbone to produce amiRNAs. As a proof of concept we induced the silencing of CH42, a magnesium chelatase subunit, using our amiRNA platform. Expression of CH42 in transgenic L. minor fronds was significantly reduced, which resulted in reduction of chlorophyll pigmentation. The techniques presented here will enable tackling future challenges in the biology and biotechnology of Lemnaceae.
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Affiliation(s)
- A Cantó-Pastor
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA
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42
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Wang Y, Xu C, Zhai J, Gao F, Liu R, Gao L, Zhao Y, Chai Z, Gao X. Label-Free Au Cluster Used for in Vivo 2D and 3D Computed Tomography of Murine Kidneys. Anal Chem 2014; 87:343-5. [DOI: 10.1021/ac503887c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yaling Wang
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Chao Xu
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- College
of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China
| | - Jiao Zhai
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Fuping Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Ru Liu
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Liang Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuliang Zhao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhifang Chai
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- School
of Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, Jiangsu 215123, China
| | - Xueyun Gao
- Key
Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
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43
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Bian Y, Weng XS, Zhai J. Multiple intraosseous pseudotumours of distal radius and hands in a patient with haemophilia A: case report. Haemophilia 2014; 20:e432-5. [PMID: 25354774 DOI: 10.1111/hae.12542] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Y Bian
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Dongcheng, Beijing, China
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44
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Liu R, Zhai J, Liu L, Wang Y, Wei Y, Jiang X, Gao L, Zhu H, Zhao Y, Chai Z, Gao X. Spatially marking and quantitatively counting membrane immunoglobulin M in live cells via Ag cluster-aptamer probes. Chem Commun (Camb) 2014; 50:3560-3. [PMID: 24563906 DOI: 10.1039/c3cc49036j] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A probe composed of an aptamer and a silver cluster, where the aptamer targets mIgM of live cells and the silver cluster provides fluorescent imaging and mass quantification of mIgM of live cells, is presented. This new probe simultaneously provides accurate spatial and mass information of mIgM in live cells.
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Affiliation(s)
- Ru Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
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45
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Bu Z, Guo Y, Su Y, Zhai J, Sun Y. Thin endometrial thickness adversely affects pregnancy rate in patients with different ovarian response undergoing in vitro fertilizatioin (IVF): an analysis of 10,406 transfer cycles. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.109] [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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46
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Yang M, Xu M, Pan X, Hu Z, Li Q, Wei Y, Zhang Y, Rong J, Zhai J, He P, Hu S, Song H, Wu H, Zhan F, Liu S, Gao G, Liu Z, Li Y, Shen L, Huang A, Lin Z, Liao Z, Cao S, Wei Q, Li Q, Lv Q, Qi J, Li T, Jin O, Pan Y, Gu J. Epidemiological comparison of clinical manifestations according to HLA-B*27 carrier status of Chinese ankylosing spondylitis patients. ACTA ACUST UNITED AC 2014; 82:338-43. [PMID: 24131020 DOI: 10.1111/tan.12186] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 07/14/2013] [Accepted: 07/22/2013] [Indexed: 02/04/2023]
Abstract
The aim of the study was to investigate and compare the clinical manifestations between HLA-B27(+) and HLA-B27(-) ankylosing spondylitis (AS) patients in order to obtain knowledge of the impact of HLA-B27 status on AS, and to inform clinical treatment. A nationwide epidemiological investigation was performed from November 2008 to October 2010. The demographic data and clinical characteristics, and the status of HLA-B27 were collected using questionnaires and laboratory assay, respectively. A total of 2144 patients (78.5% males and 78.4% HLA-B27(+) AS patients) participated in this study. The percentages of males, patients with family history, and involvement of lumbar spine, thoracic spine and hip joints, were observed to be significantly higher in the HLA-B27(+) AS patients than in their HLA-B27(-) AS peers.
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Affiliation(s)
- M Yang
- Department of Rheumatology and Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Li Q, Jiao B, Zhou F, Tan Q, Ma Y, Luo L, Zhai J, Luan Q, Li C, Wang G, Gao T. Comparative study of photodynamic therapy with 5%, 10% and 20% aminolevulinic acid in the treatment of generalized recalcitrant facial verruca plana: a randomized clinical trial. J Eur Acad Dermatol Venereol 2013; 28:1821-6. [PMID: 24267796 DOI: 10.1111/jdv.12319] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 10/11/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND Generalised recalcitrant facial verruca plana responds poorly to current therapeutic options, including cryotherapy, topical drugs and carbon dioxide (CO2 ) laser. Case reports and uncontrolled studies suggested that topical photodynamic therapy (PDT) is effective choice of treatment free from potential complications associated with invasive therapies. AIMS To investigate the efficacy and safety of PDT with different concentrations of photosensitiser in the treatment of verruca plana. MATERIALS & METHODS The two sides of a subject's face were separately randomized to receive aminolevulinic acid (ALA) of 5%, 10% or 20% concentration. All patients were irradiated with 633-nm red light for 339 J/cm(2) total dose. Complete response (CR) rate was assessed on Week 4, 8, and 16 respectively. RESULTS The mean overall clearance rate was 74.1%, 68.8%, and 64.6% on Week 4, 8, and 12, respectively, in the 110 treated sides. The CR rate was lower in the 5%-ALA group than in the 10%-ALA group (14.3% vs. 33.3%, p < 0.05) and 20%-ALA group (14.3% vs. 26.3%, p < 0.05) after 12 weeks. The mean severity of pain measured by visual analogue scale (VAS) scoring was 3.8 (range: 2 to 10, depending on the lesion location). The overall recurrence rate was 16.7% (4/24) on Week 12. Hyperpigmentation was observed in 61% (67/110) of all treated sides. On Week 4, 8, and 16, hyperpigmentation was more developed in the 20%-ALA group than in the other two groups (p < 0.05). DISCUSSION In terms of complete clearance rate, the 5% ALA-PDT group was significantly inferior to the 10% and 20% ALA-PDT groups at each follow-up. In contrast, the 20% ALA group showed a higher incidence rate of transient hyperpigmentation than the other two groups. CONCLUSIONS This randomised clinical trial suggests that PDT with ALA of 10% concentration offers better efficacy and safety than 5% or 20% concentration for generalised recalcitrant facial verruca plana.
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Affiliation(s)
- Q Li
- Department of Dermatology at Xijing Hospital, Fourth Military Medical University, Xi'an, China
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Luboz V, Zhang Y, Johnson S, Song Y, Kilkenny C, Hunt C, Woolnough H, Guediri S, Zhai J, Odetoyinbo T, Littler P, Fisher A, Hughes C, Chalmers N, Kessel D, Clough PJ, Ward J, Phillips R, How T, Bulpitt A, John NW, Bello F, Gould D. ImaGiNe Seldinger: first simulator for Seldinger technique and angiography training. Comput Methods Programs Biomed 2013; 111:419-434. [PMID: 23787028 DOI: 10.1016/j.cmpb.2013.05.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [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: 04/27/2011] [Revised: 01/07/2013] [Accepted: 05/23/2013] [Indexed: 06/02/2023]
Abstract
In vascular interventional radiology, procedures generally start with the Seldinger technique to access the vasculature, using a needle through which a guidewire is inserted, followed by navigation of catheters within the vessels. Visual and tactile skills are learnt in a patient apprenticeship which is expensive and risky for patients. We propose a training alternative through a new virtual simulator supporting the Seldinger technique: ImaGiNe (imaging guided interventional needle) Seldinger. It is composed of two workstations: (1) a simulated pulse is palpated, in an immersive environment, to guide needle puncture and (2) two haptic devices provide a novel interface where a needle can direct a guidewire and catheter within the vessel lumen, using virtual fluoroscopy. Different complexities are provided by 28 real patient datasets. The feel of the simulation is enhanced by replicating, with the haptics, real force and flexibility measurements. A preliminary validation study has demonstrated training effectiveness for skills transfer.
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Affiliation(s)
- V Luboz
- Collaborators in Radiological Interventional Virtual Environments (CRaIVE), UK.
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Abstract
microRNAs (miRNAs) function via targeting of messenger RNAs, suppressing protein levels, and playing important roles in biological processes of plants and animals. The pathway for miRNA biogenesis is well established, but less is known about miRNA turnover, largely because of difficulties in capturing miRNAs during the process of decay, in which they are both rare and ephemeral. The HEN1 protein methylates the 3' terminus of small RNAs (sRNAs), protecting them from poly-urydilation and degradation. Recent progress using deep sequencing to study sRNAs in hen1 reveals the potential for hen1 mutants to serve as a platform for studies of miRNA turnover, with the sequencing data providing unprecedented precision and detail in the characterization of 3' modifications.
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Affiliation(s)
- J Zhai
- Department of Plant & Soil Sciences, and Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19711, USA
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50
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Gu H, Liu C, Liu C, Chen M, Zhang Q, Zhai J, Wang K, Ji F, Xu Z, Shen Q, Bao X, Chen X, Li J, Dong Q, Chen C. The combined effects of the 5- HTTLPR and HTR1A rs6295 polymorphisms modulate decision making in schizophrenia patients. Genes, Brain and Behavior 2012; 12:133-9. [DOI: 10.1111/j.1601-183x.2012.00866.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 09/03/2012] [Accepted: 09/27/2012] [Indexed: 12/16/2022]
Affiliation(s)
- H. Gu
- State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing; 100875; P.R. China
| | - C. Liu
- Key Laboratory for Mental Health; Ministry of Health; Beijing; 100083; P.R. China
| | | | - M. Chen
- School of Mental Health; Jining Medical University; Jining; 272013; Shandong Province; P.R. China
| | - Q. Zhang
- School of Mental Health; Jining Medical University; Jining; 272013; Shandong Province; P.R. China
| | - J. Zhai
- School of Mental Health; Jining Medical University; Jining; 272013; Shandong Province; P.R. China
| | - K. Wang
- School of Mental Health; Jining Medical University; Jining; 272013; Shandong Province; P.R. China
| | - F. Ji
- School of Mental Health; Jining Medical University; Jining; 272013; Shandong Province; P.R. China
| | - Z. Xu
- State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing; 100875; P.R. China
| | - Q. Shen
- State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing; 100875; P.R. China
| | - X. Bao
- State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing; 100875; P.R. China
| | - X. Chen
- State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing; 100875; P.R. China
| | - J. Li
- State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing; 100875; P.R. China
| | - Q. Dong
- State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing; 100875; P.R. China
| | - C. Chen
- Department of Psychology and Social Behavior; University of California; Irvine; CA; 92697; USA
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