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Gu M, Yi X, Shang Z, Nong X, Lin M, Xia F. A fuel-initiated DNA molecular machine for microRNA detection in serum via poly-adenine-mediated spherical nucleic acids. J Mater Chem B 2023; 11:11052-11063. [PMID: 37946538 DOI: 10.1039/d3tb02361c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
MicroRNAs (miRNAs) have been identified as promising disease diagnostic biomarkers. However, it is challenging to sensitively detect miRNAs, especially in complex biological environments, due to their low abundance and small size. Herein, we have developed a DNA-fueled molecular machine for sensitive detection of miRNA-22 (miR-22) in undiluted serum by combining poly-adenine-mediated spherical nucleic acids (polyA-SNAs) with a toehold mediated strand displacement reaction (TMSDR). The polyA-SNAs are constructed by the assembly of diblock DNA probes on a AuNP surface through the high binding affinity of polyA to AuNPs. The surface density of the diblock DNA probe can be controlled by tuning the length of the polyA block, and the orientation of the diblock DNA probe can adopt an upright conformation, which is beneficial to target hybridization and TMSDRs. TMSDR is an enzyme-free target recycling amplification approach. Taking advantage of polyA-mediated SNAs and TMSDR, the operation of the molecular machine based on two successive TMSDRs on polyA20-SNAs is rapid and efficient, which can significantly amplify the fluorescence response for detection of miR-22 in an undiluted complex matrix. The developed sensor can detect as low as 10 pM of target miRNA/DNA in undiluted fetal bovine serum within 30 min. The synergetic effect of polyA-mediated SNAs and TMSDR presents a potential alternative tool for the detection of biomarkers in real biological samples.
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Affiliation(s)
- Menghan Gu
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China
| | - Xiaoqing Yi
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China
| | - Zhiwei Shang
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Xianliang Nong
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Meihua Lin
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China
| | - Fan Xia
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
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Shang Z, Li R, Zheng C, Li H, Cui Y. Relative Entropy Regularized Sample-Efficient Reinforcement Learning With Continuous Actions. IEEE Trans Neural Netw Learn Syst 2023; PP:1-11. [PMID: 37943648 DOI: 10.1109/tnnls.2023.3329513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
In this article, a novel reinforcement learning (RL) approach, continuous dynamic policy programming (CDPP), is proposed to tackle the issues of both learning stability and sample efficiency in the current RL methods with continuous actions. The proposed method naturally extends the relative entropy regularization from the value function-based framework to the actor-critic (AC) framework of deep deterministic policy gradient (DDPG) to stabilize the learning process in continuous action space. It tackles the intractable softmax operation over continuous actions in the critic by Monte Carlo estimation and explores the practical advantages of the Mellowmax operator. A Boltzmann sampling policy is proposed to guide the exploration of actor following the relative entropy regularized critic for superior learning capability, exploration efficiency, and robustness. Evaluated by several benchmark and real-robot-based simulation tasks, the proposed method illustrates the positive impact of the relative entropy regularization including efficient exploration behavior and stable policy update in RL with continuous action space and successfully outperforms the related baseline approaches in both sample efficiency and learning stability.
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Shang Z, Deng Z, Yi X, Yang M, Nong X, Lin M, Xia F. Construction and bioanalytical applications of poly-adenine-mediated gold nanoparticle-based spherical nucleic acids. Anal Methods 2023; 15:5564-5576. [PMID: 37861233 DOI: 10.1039/d3ay01618h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Owing to the versatile photophysical and chemical properties, spherical nucleic acids (SNAs) have been widely used in biosensing. However, traditional SNAs are formed by self-assembly of thiolated DNA on the surface of a gold nanoparticle (AuNP), where it is challenging to precisely control the orientation and surface density of DNA. As a new SNA, a polyadenine (polyA)-mediated SNA using the high binding affinity of consecutive adenines to AuNPs shows controllable surface density and configuration of DNA, which can be used to improve the performance of a biosensor. Herein, we first introduce the properties of polyA-mediated SNAs and fundamental principles regarding the polyA-AuNP interaction. Then, we provide an overview of current representative synthesis methods of polyA-mediated SNAs and their advantages and disadvantages. After that, we summarize the application of polyA-mediated SNAs in biosensing based on fluorescence and colorimetric methods, followed by discussion and an outlook of future challenges in this field.
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Affiliation(s)
- Zhiwei Shang
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Zixuan Deng
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Xiaoqing Yi
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, China
| | - Mengyu Yang
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Xianliang Nong
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Meihua Lin
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Fan Xia
- State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
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Du L, Cui T, Meng X, Yuan Y, Wang L, Shang Z, Chen H, Huang H. Analysis of scanning systematic errors for airborne laser bathymetry. Appl Opt 2023; 62:6939-6951. [PMID: 37707033 DOI: 10.1364/ao.494179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 08/14/2023] [Indexed: 09/15/2023]
Abstract
For the Palmer mechanical scanning pattern of an airborne laser bathymetry system, the potential errors of the scanning system are analyzed, and the associated error model is derived. The model composes the description of laser rays, water surface fluctuations, and refraction, and introduces certain simplifications concerning the water surface and column. Based on the scanning error model, the impact of each error source on the vertical and horizontal positioning accuracy is investigated and established through a numerical simulation. The quantitative impacts of each inaccuracy on the coordinates of the laser footprints on the sea surface and bottom were calculated, with a height of 100 m for the airborne platform and a water depth of 10 m. To verify the correctness of the simulation results and the error model based on a theoretical analysis, experiments are utilized with the system that we developed. Both the simulation analysis and experimental results show that this method can effectively obtain the systematic errors. The outcomes of the error model and analysis will give the theoretical foundations for lowering the effect brought on by each error source in the compensation scanning system and improving the point cloud accuracy in the ensuing data processing.
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Shang Z, Feng H, Xia L. The Suppression Effects of Fat Mass and Obesity Associated Gene on the Hair Follicle-Derived Neural Crest Stem Cells Differentiating into Melanocyte by N6-Methyladenosine Modifying Microphthalmia-Associated Transcription Factor. Int J Stem Cells 2023; 16:135-144. [PMID: 36823977 DOI: 10.15283/ijsc22106] [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: 06/30/2022] [Revised: 10/24/2022] [Accepted: 11/15/2022] [Indexed: 02/25/2023] Open
Abstract
Background and Objectives Melanocyte (MC), derived from neural crest stem cell (NCSC), are involved in the production of melanin. The mechanism by which NCSC differentiates to MC remains unclear. N6-methyladenosine (m6A) modification was applied to discuss the potential mechanism. Methods and Results NCSCs were isolated from hair follicles of rats, and were obtained for differentiation. Cell viability, tyrosinase secretion and activity, and transcription factors were combined to evaluated the MC differentiation. RT-qPCR was applied to determine mRNA levels, and western blot were used for protein expression detection. Total m6A level was measured using methylated RNA immunoprecipitation (MeRIP) assay, and RNA immunoprecipitation was used to access the protein binding relationship. In current work, NCSCs were successfully differentiated into MCs. Fat mass and obesity associated gene (FTO) was aberrant downregulated in MCs, and elevated FTO suppressed the differentiation progress of NCSCs into MCs. Furthermore, microphthalmia-associated transcription factor (Mitf), a key gene involved in MC synthesis, was enriched by FTO in a m6A modification manner and degraded by FTO. Meanwhile, the suppression functions of FTO in the differentiation of NCSCs into MCs were reversed by elevated Mitf. Conclusions In short, FTO suppressed the differentiating ability of hair follicle-derived NCSCs into MCs by m6A modifying Mitf.
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Affiliation(s)
- Zhiwei Shang
- Department of Dermatology, The First Affiliated Hospital, College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Haixia Feng
- Department of Dermatology, The First Affiliated Hospital, College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Liye Xia
- Department of Dermatology, The First Affiliated Hospital, College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
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Karanam N, Shang Z, Story M, Timmerman R, Saha D. Preclinical Evaluation of Tumor Treating Fields Combined with Personalized Ultra-Fractionated Stereotactic Adaptive Radiotherapy (PULSAR). Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.2115] [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: 10/31/2022]
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7
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Han Y, Lu S, Zhao R, Xu Y, Chen Y, Xiang C, Wu Q, Chen S, Pang J, Shang Z, Zhao J, Bao H, Shao Y. EP16.03-044 Genomic Evidence Depicting Clonal Evolution of Lung Adenosquamous Carcinoma. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.1105] [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: 10/14/2022]
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8
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Zhou J, Li X, Shang Z, Gao A, Ji S, He C. DNA Polymerase Iota (Pol ι) Promotes Radioresistance of Esophageal Squamous Cell Carcinoma through Blocking Ubiquitin-mediated RAD51 Degradation and Homologous Recombinational Repair after Radiation-induced DNA Damage. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2145] [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: 10/23/2022]
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9
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Zhang YF, Su R, Xie DY, Niu TJ, Xue S, Li Q, Shang Z, Ding J, Richter NA, Wang J, Wang H, Zhang X. Design of super-strong and thermally stable nanotwinned Al alloys via solute synergy. Nanoscale 2020; 12:20491-20505. [PMID: 33026022 DOI: 10.1039/d0nr05707j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Al alloys have widespread industrial applications. However, their mechanical strength is often much lower than steels. Here, we investigate the influence of solutes on achieving ultrahigh strength and thermal stability of nanotwinned Al alloys. In situ micropillar compression tests show the addition of a small amount of Ti can significantly increase the mechanical strength of Al-Ni alloys to 2 GPa. Deformation induced detwinning, Ni segregation and grain coarsening as discovered in binary Al-Ni alloys are mostly absent in the ternary Al-Ni-Ti alloys. Moreover, the ternary Al-Ni-Ti alloys have outstanding thermal stability. Density function theory calculations reveal the synergetic pinning effect of Ni-Ti solute pairs on incoherent twin boundaries. This study demonstrates that the proper selection of synergistic solute pairs is critical to improve the thermal stability and mechanical properties of nanotwinned Al alloys.
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Affiliation(s)
- Y F Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - R Su
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - D Y Xie
- Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - T J Niu
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - S Xue
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Q Li
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Z Shang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - J Ding
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - N A Richter
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Jian Wang
- Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - H Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. and School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - X Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
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Abstract
Limits of the available model have, in the long term, challenged the studies of cancer-associated fibroblasts (CAFs) and their interplay with cancer stem cells, one of the key driving forces of patients with oral squamous cell carcinoma (OSCC). In the present study, the 3-dimensional organoid model was employed to investigate whether co-culture with paralleled CAFs promotes stem-like properties of OSCC. Experimentally, tumor organoids and paralleled CAFs were generated from patients with OSCC. Then, the CD44+ cells in organoids were sorted out by flow cytometry and co-cultured with CAFs in Matrigel. The results showed that co-culture with CAFs enhances the organoid-forming ability of CD44+ cells and that this effect was blocked when production or uptake of lactate in CAFs or CD44+ cells was inhibited. Furthermore, the expression levels of CD44 and OCT-4 were detected in organoids incubated with lactate, via immunofluorescence or Western blot assay. The results demonstrated that treatments with lactate promote the organoid-forming ability of CD44+ cells, as well as the expression of CD44 and OCT-4 at the protein level in OSCC organoids.
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Affiliation(s)
- H Zhao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - E Jiang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Z Shang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China.,Department of Oral and Maxillofacial-Head and Neck Oncology, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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11
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Jiang Y, Tsui CKM, Ahmed SA, Hagen F, Shang Z, Gerrits van den Ende AHG, Verweij PE, Lu H, de Hoog GS. Intraspecific Diversity and Taxonomy of Emmonsia crescens. Mycopathologia 2020; 185:613-627. [PMID: 32710392 DOI: 10.1007/s11046-020-00475-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 07/06/2020] [Indexed: 12/24/2022]
Abstract
Emmonsia crescens is known as an environmental pathogen causing adiaspiromycosis in small rodents. As the generic name Emmonsia is no longer available for this species, its taxonomic position is re-evaluated. The intraspecific variation of Emmonsia crescens was analyzed using molecular, morphological, and physiological data, and the relationship between frequency of adiaspiromycosis and body temperature of host animals was explored. A North American and a pan-global lineage could be discerned, each with subclusters at low genetic distance. European strains produced the classical type of very large adiaspores, while in the North American lineage adiaspores relatively small, resembling the broad-based budding cells of Blastomyces. Members of the closely related genus Emergomyces may exhibit large, broad-based in addition to small, narrow-based budding cells. We conclude that the morphology of the pathogenic phase in these fungi differs gradationally between species and even populations, and is therefore less suitable as a diagnostic criterion for generic delimitation. Two Emmonsia species are reclassified in Emergomyces.
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Affiliation(s)
- Y Jiang
- Department of Dermatology, The Affiliated Hospital, Guizhou Medical University, Guiyang, China. .,Center of Expertise in Mycology of Radboud University Medical Center/Canisius Wilhelmina Hospital, Nijmegen, The Netherlands.
| | - C K M Tsui
- Department of Pathology, Sidra Medicine, Doha, Qatar.,Department of Pathology and Laboratory Medicine, Weill Cornell Medicine-Qatar, Doha, Qatar.,Division of Infectious Diseases, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - S A Ahmed
- Center of Expertise in Mycology of Radboud University Medical Center/Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - F Hagen
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands.,Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, The Netherlands.,Laboratory of Medical Mycology, Jining No. 1 People's Hospital, Jining, Shandong, China
| | - Z Shang
- Department of Immunology, Basic Medical School, Guizhou Medical University, Guiyang, China
| | | | - P E Verweij
- Center of Expertise in Mycology of Radboud University Medical Center/Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - H Lu
- Department of Dermatology, The Affiliated Hospital, Guizhou Medical University, Guiyang, China.
| | - G S de Hoog
- Center of Expertise in Mycology of Radboud University Medical Center/Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
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Ding J, Neffati D, Li Q, Su R, Li J, Xue S, Shang Z, Zhang Y, Wang H, Kulkarni Y, Zhang X. Thick grain boundary induced strengthening in nanocrystalline Ni alloy. Nanoscale 2019; 11:23449-23458. [PMID: 31799538 DOI: 10.1039/c9nr06843k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Grain refinement has been extensively used to strengthen metallic materials for decades. Grain boundaries act as effective barriers to the transmission of dislocations, consequently leading to strengthening. Conventional grain boundaries have a thickness of 1-2 atomic layers, typically ∼0.5 nm for most metallic materials. Here, we report, however, the formation of ∼3 nm thick grain boundaries in a nanocrystalline Ni alloy. In situ micropillar compression studies coupled with molecular dynamics simulations suggest that the thick grain boundaries are stronger barriers than conventional grain boundaries to the transmission of dislocations. This study provides a fresh perspective for the design of high strength, deformable nanostructured metallic materials.
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Affiliation(s)
- Jie Ding
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - D Neffati
- Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA
| | - Qiang Li
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - R Su
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Jin Li
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - S Xue
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Z Shang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Y Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - H Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. and School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Y Kulkarni
- Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA
| | - X Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.
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Cho J, Li J, Shang Z, Lopez JM, Jarosinski WJ, Gentleman M, Viswanathan V, Xue S, Wang H, Zhang X. Comparison of temperature dependent deformation mechanisms of 8YSZ thermal barrier coatings prepared by air-plasma-spray and D-gun thermal spray: An in situ study. Ann Ital Chir 2019. [DOI: 10.1016/j.jeurceramsoc.2019.04.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Liu Q, Shao Z, Shang Z. Mandibular reconstruction using the deep circumflex iliac artery free flap: effect of the length of bone harvested on donor site morbidity. Br J Oral Maxillofac Surg 2019; 57:778-781. [PMID: 31350030 DOI: 10.1016/j.bjoms.2019.07.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 07/10/2019] [Indexed: 11/17/2022]
Abstract
The aim of this study was to assess the amounts of pain and morbidity that are associated with the length of the harvested anterior iliac bone graft (cm), and their effect on the contour of the donor site and activities of daily life. A total of 62 patients who had mandibular reconstruction using an iliac bone graft were enrolled in this study at the Wuhan University Hospital. The same surgical standards were used throughout. We divided the patients into two groups depending to the length of the graft (<9cm or 9cm or more). The amount and duration of the pain, the time necessary to walk normally, abnormalities of sensation, contour of the donor site, length of the scar, and the patients' satisfaction with the donor site were evaluated, and outcomes in the two groups compared. The worst pain after operation (p=0.001) the length of the scar (p=0.001), and the time needed before the patients were able to walk (p=0.001) differed significantly between the two groups. There was no significant difference between the two groups regarding other complications. The anterior iliac crest might still be considered to be an ideal donor site for large mandibular defects.
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Affiliation(s)
- Q Liu
- Department of Oral and Maxillofacial and Head and Neck Oncology, School and Hospital of Stomatology, Wuhan University, #237 Luoyu Road, Wuhan, 430079, China
| | - Z Shao
- Department of Oral and Maxillofacial and Head and Neck Oncology, School and Hospital of Stomatology, Wuhan University, #237 Luoyu Road, Wuhan, 430079, China.
| | - Z Shang
- Department of Oral and Maxillofacial and Head and Neck Oncology, School and Hospital of Stomatology, Wuhan University, #237 Luoyu Road, Wuhan, 430079, China
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Li J, Zhang G, Shang Z, Fan X, Zhang H, Zhou L, Shi X. Enhanced electromagnetic interference shielding and mechanical properties of foamed epoxy nanocomposites containing carbon nanofiber treated with silicone surfactant. J Appl Polym Sci 2018. [DOI: 10.1002/app.46833] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- J. Li
- Department of Applied Chemistry, MOE Key Lab of Applied Physics and Chemistry in Space; College of Science, Northwestern Polytechnical University; Xi'an 710072 China
| | - G. Zhang
- Department of Applied Chemistry, MOE Key Lab of Applied Physics and Chemistry in Space; College of Science, Northwestern Polytechnical University; Xi'an 710072 China
| | - Z. Shang
- Department of Applied Chemistry, MOE Key Lab of Applied Physics and Chemistry in Space; College of Science, Northwestern Polytechnical University; Xi'an 710072 China
| | - X. Fan
- Department of Applied Chemistry, MOE Key Lab of Applied Physics and Chemistry in Space; College of Science, Northwestern Polytechnical University; Xi'an 710072 China
| | - H. Zhang
- Department of Applied Chemistry, MOE Key Lab of Applied Physics and Chemistry in Space; College of Science, Northwestern Polytechnical University; Xi'an 710072 China
| | - L. Zhou
- Department of Applied Chemistry, MOE Key Lab of Applied Physics and Chemistry in Space; College of Science, Northwestern Polytechnical University; Xi'an 710072 China
| | - X. Shi
- Department of Applied Chemistry, MOE Key Lab of Applied Physics and Chemistry in Space; College of Science, Northwestern Polytechnical University; Xi'an 710072 China
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16
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Tang YT, Wang D, Luo H, Xiao M, Zhou HS, Liu D, Ling SP, Wang N, Hu XL, Luo Y, Mao X, Ao QL, Huang J, Zhang W, Sheng LS, Zhu LJ, Shang Z, Gao LL, Zhang PL, Zhou M, Zhou KG, Qiu LG, Liu QF, Zhang HY, Li JY, Jin J, Fu L, Zhao WL, Chen JP, Du X, Huang G, Wang QF, Zhou JF, Huang L. Aggressive NK-cell leukemia: clinical subtypes, molecular features, and treatment outcomes. Blood Cancer J 2017; 7:660. [PMID: 29263371 PMCID: PMC5802497 DOI: 10.1038/s41408-017-0021-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/01/2017] [Accepted: 10/10/2017] [Indexed: 12/29/2022] Open
Affiliation(s)
- Y-T Tang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - D Wang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - H Luo
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - M Xiao
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - H-S Zhou
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - D Liu
- Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - S-P Ling
- Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - N Wang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - X-L Hu
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y Luo
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - X Mao
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Q-L Ao
- Department of Pathology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - J Huang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - W Zhang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L-S Sheng
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L-J Zhu
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Z Shang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L-L Gao
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - P-L Zhang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - M Zhou
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - K-G Zhou
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L-G Qiu
- Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjing, China
| | - Q-F Liu
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - H-Y Zhang
- Department of Hematology, Peking University Shenzhen Hospital, Shenzhen, China
| | - J-Y Li
- Department of Hematology, the First Affiliated Hospital of Nanjing Medical University and Jiangsu Province Hospital, Nanjing, China
| | - J Jin
- Department of Hematology, the First Affiliated Hospital, Zhejiang University College of Medicine, Hangzhou, China
| | - L Fu
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - W-L Zhao
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, Shanghai Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - J-P Chen
- Department of Hematology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - X Du
- Department of Hematology, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou, China
| | - G Huang
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Division of Pathology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Q-F Wang
- Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - J-F Zhou
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjing, China.,Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L Huang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. .,Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Zhang T, Song C, Song L, Shang Z, Yang S, Zhang D, Sun W, Shen Q, Zhao D. RNA Sequencing and Coexpression Analysis Reveal Key Genes Involved in α-Linolenic Acid Biosynthesis in Perilla frutescens Seed. Int J Mol Sci 2017; 18:ijms18112433. [PMID: 29144390 PMCID: PMC5713401 DOI: 10.3390/ijms18112433] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/09/2017] [Accepted: 11/15/2017] [Indexed: 12/24/2022] Open
Abstract
Perilla frutescen is used as traditional food and medicine in East Asia. Its seeds contain high levels of α-linolenic acid (ALA), which is important for health, but is scarce in our daily meals. Previous reports on RNA-seq of perilla seed had identified fatty acid (FA) and triacylglycerol (TAG) synthesis genes, but the underlying mechanism of ALA biosynthesis and its regulation still need to be further explored. So we conducted Illumina RNA-sequencing in seven temporal developmental stages of perilla seeds. Sequencing generated a total of 127 million clean reads, containing 15.88 Gb of valid data. The de novo assembly of sequence reads yielded 64,156 unigenes with an average length of 777 bp. A total of 39,760 unigenes were annotated and 11,693 unigenes were found to be differentially expressed in all samples. According to Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis, 486 unigenes were annotated in the “lipid metabolism” pathway. Of these, 150 unigenes were found to be involved in fatty acid (FA) biosynthesis and triacylglycerol (TAG) assembly in perilla seeds. A coexpression analysis showed that a total of 104 genes were highly coexpressed (r > 0.95). The coexpression network could be divided into two main subnetworks showing over expression in the medium or earlier and late phases, respectively. In order to identify the putative regulatory genes, a transcription factor (TF) analysis was performed. This led to the identification of 45 gene families, mainly including the AP2-EREBP, bHLH, MYB, and NAC families, etc. After coexpression analysis of TFs with highly expression of FAD2 and FAD3 genes, 162 TFs were found to be significantly associated with two FAD genes (r > 0.95). Those TFs were predicted to be the key regulatory factors in ALA biosynthesis in perilla seed. The qRT-PCR analysis also verified the relevance of expression pattern between two FAD genes and partial candidate TFs. Although it has been reported that some TFs are involved in seed development, more direct evidence is still needed to verify their function. However, these findings can provide clues to reveal the possible molecular mechanisms of ALA biosynthesis and its regulation in perilla seed.
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Affiliation(s)
- Tianyuan Zhang
- Rapeseed Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, China.
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Guiyang 550025, China.
| | - Chi Song
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Li Song
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Guiyang 550025, China.
| | - Zhiwei Shang
- Rapeseed Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, China.
| | - Sen Yang
- Rapeseed Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, China.
| | - Dong Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Wei Sun
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Qi Shen
- Rapeseed Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, China.
| | - Degang Zhao
- Rapeseed Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550008, China.
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou University, Guiyang 550025, China.
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Shang Z, Feng H, Cui L, Wang W, Fu H. Propofol promotes apoptosis and suppresses the HOTAIR-mediated mTOR/p70S6K signaling pathway in melanoma cells. Oncol Lett 2017; 15:630-634. [PMID: 29375720 DOI: 10.3892/ol.2017.7297] [Citation(s) in RCA: 5] [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: 12/07/2015] [Accepted: 06/29/2017] [Indexed: 01/29/2023] Open
Abstract
Propofol is an intravenous anesthetic, which is widely used in clinical anesthesia induction and maintenance and is critical in the sedation of patients. However, the functions and mechanisms of propofol on apoptosis of melanoma cells remain unclear. The present study investigated whether propofol promotes cell apoptosis and suppresses the HOX transcript antisense RNA (HOTAIR)-mediated mechanistic target of rapamycin (mTOR) pathway in melanoma cells. B16F10 cells were cultured with different concentrations (0-10 µM) of propofol for 24 or 48 h. Proliferation and apoptosis of B16F10 cells were detected using MTT assay and flow cytometry. The pcDNA 3.1(-)-HOTAIR and pcDNA 3.1(-)-control plasmids were transfected into B16F10 cells using Lipofectamine 2000. In the present study, treatment with propofol significantly reduced viability, and induced apoptosis and caspase-3 activity in melanoma cells. Propofol treatment significantly inhibited HOTAIR expression and the expression of phosphorylated (p)-mTOR and p- p70S6K protein in melanoma cells. Overexpression of HOTAIR significantly increased viability of melanoma cells, and increased HOTAIR, p-mTOR and p-p70S6K protein expression in melanoma cells. These results indicated that propofol promotes apoptosis and suppresses the HOTAIR-mediated mTOR signaling pathway in melanoma cells.
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Affiliation(s)
- Zhiwei Shang
- Department of Dermatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
| | - Haixia Feng
- Department of Dermatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
| | - Lisha Cui
- Department of Dermatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
| | - Weiping Wang
- Department of Dermatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
| | - Hongwei Fu
- Department of Dermatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, P.R. China
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19
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Wang L, Macri L, Ma B, Wang L, Ashley M, Cui X, Du F, Fu J, Feng L, Gong X, Hu Y, Li G, Li X, Li Z, Lawrence J, Luong-Van D, Pennypacker C, Shang Z, Storey J, Yang H, Yuan X, York D, Zhou X, Zhu Z, Zhu Z, Zhou J. Stellar variability from Dome A, Antarctica. EPJ Web Conf 2017. [DOI: 10.1051/epjconf/201715202010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Xiao Y, Deng T, Shang Z, Wang D. Adiponectin inhibits oxidization-induced differentiation of T helper cells through inhibiting costimulatory CD40 and CD80. ACTA ACUST UNITED AC 2017; 50:e6227. [PMID: 28513775 PMCID: PMC5479391 DOI: 10.1590/1414-431x20176227] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 03/27/2017] [Indexed: 12/19/2022]
Abstract
Adiponectin is a multifunctional adipokine that has several oligomeric forms in the blood stream, which broadly regulates innate and acquired immunity. Therefore, in this study, we aimed to observe the differentiation of T helper (Th) cells and expression of costimulatory signaling molecules affected by adiponectin. The mRNA and protein expression levels of adiponectin and its receptors in oxidized low density lipoprotein cholesterol-treated endothelial cells were assayed by real time PCR and immunofluorescence. The endothelial cells were then treated with adiponectin with or without adipoR1 or adipoR2 siRNA and co-cultured with T lymphocytes. The distribution of Th1, Th2 and Th17 subsets were assayed by flow cytometry. The effects of adiponectin on costimulatory signaling molecules HLA-DR, CD80, CD86 and CD 40 was also assayed by flow cytometry. The results showed that endothelial cells expressed adiponectin and its receptor adipoR1 and adipoR2, but not T-cadherin. Adiponectin suppressed Th1 and Th17 differentiation through adipoR1 receptor, contributed to the inhibition of CD80 and CD40, and inhibited differentiation of Th1 and Th17 by inhibiting antigen presenting action.
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Affiliation(s)
- Y Xiao
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - T Deng
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Z Shang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - D Wang
- Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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21
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Shang Z, Li H. Altered expression of four miRNA (miR-1238-3p, miR-202-3p, miR-630 and miR-766-3p) and their potential targets in peripheral blood from vitiligo patients. J Dermatol 2017; 44:1138-1144. [PMID: 28500632 DOI: 10.1111/1346-8138.13886] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 03/17/2017] [Indexed: 12/17/2022]
Abstract
Vitiligo is an acquired skin disease with pigmentary disorder. Autoimmune destruction of melanocytes is thought to be major factor in the etiology of vitiligo. miRNA-based regulators of gene expression have been reported to play crucial roles in autoimmune disease. Therefore, we attempt to profile the miRNA expressions and predict their potential targets, assessing the biological functions of differentially expressed miRNA. Total RNA was extracted from peripheral blood of vitiligo (experimental group, n = 5) and non-vitiligo (control group, n = 5) age-matched patients. Samples were hybridized to a miRNA array. Box, scatter and principal component analysis plots were performed, followed by unsupervised hierarchical clustering analysis to classify the samples. Quantitative reverse transcription polymerase chain reaction (RT-PCR) was conducted for validation of microarray data. Three different databases, TargetScan, PITA and microRNA.org, were used to predict the potential target genes. Gene ontology (GO) annotation and pathway analysis were performed to assess the potential functions of predicted genes of identified miRNA. A total of 100 (29 upregulated and 71 downregulated) miRNA were filtered by volcano plot analysis. Four miRNA were validated by quantitative RT-PCR as significantly downregulated in the vitiligo group. The functions of predicted target genes associated with differentially expressed miRNA were assessed by GO analysis, showing that the GO term with most significantly enriched target genes was axon guidance, and that the axon guidance pathway was most significantly correlated with these miRNA. In conclusion, we identified four downregulated miRNA in vitiligo and assessed the potential functions of target genes related to these differentially expressed miRNA.
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Affiliation(s)
- Zhiwei Shang
- Department of Dermatology, The First Affiliated Hospital, and College of Clinical Medicine of Zhengzhou University, Zhengzhou, China.,Department of Dermatology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, China
| | - Hongwen Li
- Department of Dermatology, The First Affiliated Hospital, and College of Clinical Medicine of Zhengzhou University, Zhengzhou, China
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22
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Shang Z, Dai T, Ren Y. Neurofibroma and lipoma in association with giant congenital melanocytic nevus coexisting in one nodule: a case report. Int J Clin Exp Med 2015; 8:11048-11051. [PMID: 26379904 PMCID: PMC4565287] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/04/2015] [Indexed: 06/05/2023]
Abstract
Giant congenital melanocytic nevi (GCMN) are rare conditions that defined as melanocytic lesion recognized at birth, which will reach a diameter larger than 20 cm, and they occur in about 1 per 500,000 newborns. Despite its rarity, they may associate with severe abnormalities like spina bifida occulta, meningocele, club foot and hypertrophy or atrophy of deeper structures of a limb, Carney complex, premature aging syndromes, neurofibroma, vitiligo, lipoma and dysplasia of bilateral hip impact on the patient. In this case, we report a 3-years-old male child presenting a GCMN with large, blackish, and thick nevus covering over the entire neck, back, and lower to the waist level. We highlight the importance of proper histopathological examination of the biopsy taken from the single huge nodule which revealed features of both neurofibroma and lipoma coexisting. The objective of this paper is to report a rare case with the clinical and pathologic findings.
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Affiliation(s)
- Zhiwei Shang
- Department of Dermatology, The First Affiliated Hospital of Henan University of Science and TechnologyLuoyang 471003, China
| | - Tao Dai
- Department of Plastic Surgery, The Third Affiliated Hospital of Henan University of Science and TechnologyLuoyang 471003, China
| | - Yongqiang Ren
- Department of Plastic Surgery, The First Affiliated Hospital of Henan University of Science and TechnologyLuoyang 471003, China
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23
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Lv W, Zheng J, Luan M, Shi M, Zhu H, Zhang M, Lv H, Shang Z, Duan L, Zhang R, Jiang Y. Comparing the evolutionary conservation between human essential genes, human orthologs of mouse essential genes and human housekeeping genes. Brief Bioinform 2015; 16:922-31. [DOI: 10.1093/bib/bbv025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Indexed: 12/31/2022] Open
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25
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Shang Z, Ren J, Tao L, Wang X. Assessment of heavy metals in surface sediments from Gansu section of Yellow River, China. Environ Monit Assess 2015; 187:79. [PMID: 25655129 DOI: 10.1007/s10661-015-4328-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 01/25/2015] [Indexed: 06/04/2023]
Abstract
The concentrations of Cu, Fe, Mn, Ni, Zn, Cr, Pb, and Cd in 28 samples collected from bottom sediments in the Gansu section of Yellow River, China, were investigated in order to evaluate their distribution and pollution level. The measured metals in the sediments were found to be in the range of Cu 15.52∼57.50 mg/kg, Fe 19593.24∼69963.42 mg/kg, Mn 472.70∼1491.67 mg/kg, Ni 5.10∼74.28 mg/kg, Zn 64.61∼173.83 mg/kg, Cr 57.68∼183.47 mg/kg, Pb 1.21∼28.36 mg/kg, and Cd 0.35∼4.25 mg/kg. The mean values of the heavy metal contents were arranged in the following decreasing order: Fe > Mn > Cr > Zn > Ni > Cu > Pb > Cd. There were significantly positive correlations between Cu, Fe, Mn, and Zn. However, principal component analysis (PCA) extracted two factors with Eigenvalues explaining 62.15 % of the total variance. Cu, Fe, Mn, Zn, and Cr had a natural origin controlled by the first factor. Ni and Pb could originate anthropogenic sources controlled by the second factor. Cd could be affected by natural geological background and human activity. It was attributed principally to anthropogenic activities that the geo-accumulation index, enrichment factor, and pollution load index of Cr were all higher than other measured metals. Zn appears to pose no risk at all of the sites of the system. The pollution class of sediment from the Gansu section in the upstream of Yellow River was 0∼1, from unpolluted to moderately polluted degree.
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Affiliation(s)
- Z Shang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, People's Republic of China
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Xia X, Liu K, Zhang H, Shang Z. Correlation between
CCR
7 expression and lymph node metastatic potential of human tongue carcinoma. Oral Dis 2014; 21:123-31. [DOI: 10.1111/odi.12228] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 01/01/2014] [Accepted: 02/03/2014] [Indexed: 12/26/2022]
Affiliation(s)
- X Xia
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education School & Hospital of Stomatology Wuhan University WuhanChina
| | - K Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education School & Hospital of Stomatology Wuhan University WuhanChina
- Department of Oral and Maxillofacial and Head and Neck Oncology School and Hospital of Stomatology Wuhan University Wuhan China
| | - H Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education School & Hospital of Stomatology Wuhan University WuhanChina
| | - Z Shang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of Education School & Hospital of Stomatology Wuhan University WuhanChina
- Department of Oral and Maxillofacial and Head and Neck Oncology School and Hospital of Stomatology Wuhan University Wuhan China
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27
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Guo L, Sun B, Shang Z, Leng L, Wang Y, Wang N, Li H. Comparison of adipose tissue cellularity in chicken lines divergently selected for fatness. Poult Sci 2011; 90:2024-34. [DOI: 10.3382/ps.2010-00863] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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28
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Zhou P, Tian F, Zou J, Shang Z. Rediscovery of Halogen Bonds in Protein-Ligand Complexes. Mini Rev Med Chem 2010; 10:309-14. [DOI: 10.2174/138955710791331016] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Accepted: 04/17/2010] [Indexed: 11/22/2022]
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Vandenhove H, Olyslaegers G, Sanzharova N, Shubina O, Reed E, Shang Z, Velasco H. Proposal for new best estimates of the soil-to-plant transfer factor of U, Th, Ra, Pb and Po. J Environ Radioact 2009; 100:721-32. [PMID: 19058886 DOI: 10.1016/j.jenvrad.2008.10.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2007] [Revised: 10/10/2008] [Accepted: 10/20/2008] [Indexed: 05/06/2023]
Abstract
There is increasing interest in radiological assessment of discharges of naturally occurring radionuclides into the terrestrial environment. Such assessments require parameter values for the pathways considered in predictive models. An important pathway for human exposure is via ingestion of food crops and animal products. One of the key parameters in environmental assessment is therefore the soil-to-plant transfer factor to food and fodder crops. The objective of this study was to compile data, based on an extensive literature survey, concerning soil-to-plant transfer factors for uranium, thorium, radium, lead, and polonium. Transfer factor estimates were presented for major crop groups (Cereals, Leafy vegetables, Non-leafy vegetables, Root crops, Tubers, Fruits, Herbs, Pastures/grasses, Fodder), and also for some compartments within crop groups. Transfer factors were also calculated per soil group, as defined by their texture and organic matter content (Sand, Loam, Clay and Organic), and evaluation of transfer factors' dependency on specific soil characteristics was performed following regression analysis. The derived estimates were compared with estimates currently in use.
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Affiliation(s)
- H Vandenhove
- Belgian Nuclear Research Centre, Biosphere Impact Studies, Mol, Belgium.
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Shang Z, Ren X, Zhang J, Zhu X, Qi H, Liu Q, Zhang K, Wu S, Zeng Y. Experimental study on in vitro tumor cell killing by focused bi-frequency ultrasound activated hematoporphyrin derivatives. ACTA ACUST UNITED AC 2006; 29:267-71. [PMID: 17058589 DOI: 10.1007/bf03178576] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE As ultrasound has become an important therapeutic technique on tumor, in order to find the cell-killing effect of focused bi-frequency ultrasound activated hematoporphyrin derivatives, experimental study was processed in vitro. METHODS Tumor cells K562 and SW-480 were killed by focused bi-frequency ultrasound activated hematoporphyrin (Hp) derivatives under optimized ultrasonic parameters and the cell-killing effect was tested by MTT (Thiazolyl blue: 3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide) technique. RESULTS The lower frequency (0.6 MHz) was better than the higher (1.1 MHz) in activating hematoporphyrin derivatives; the bi-frequency was better than mono-frequency, and the cell-killing efficiency was 2-3 times of sum of the two kinds of ultrasounds which constitute bi-frequency. Incubation for the 16 h was better than 4 h after the cells exposed to the ultrasound. CONCLUSION The method of killing tumor cells by focused bi-frequency ultrasound activated hematoporphyrin derivatives is presented and evaluated in this paper.
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Affiliation(s)
- Z Shang
- Biomedical Engineering Center, Beijing University of Technology, Beijing, China
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32
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Shang Z. [Kou Zongshi and his Amplification of classics of Shen Nong's Herbal] (Chi). Zhonghua Yi Shi Za Zhi 2001; 14:146-9. [PMID: 11611822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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33
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Shang Z. [Differentiation of Ziyi Bencao as an apocrypha]. Zhonghua Yi Shi Za Zhi 2001; 26:54-5. [PMID: 11613286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
It is generally believed that Ziyi Bencao is a book of the pre-Qin period. By studies on several aspects, including ancient bibliographical records, relics unearthed in Mawangdui Han tombs, nomenclature of ancient book titles, the date of appearance of ancient classics, contradictions between the time of activities of Bian Que and Ziyi, it is concluded that, in the pre-Qin period, there were no classic of herbology of any kind, even less Ziyi Bencao. The books entitled Ziyi Bencao recorded in bibliographies after Han Dynasty are all apocryphas made by Han authors.
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Shang Z. [Differential analyses on the historical relationship between Zhenglei bencao (herbology of classified syndromes) and Mingyi Bie Lu (appendant records of famous physicians)]. Zhonghua Yi Shi Za Zhi 2001; 24:38-40. [PMID: 11615227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
This author claims that, by using the approach of "inclusion of all canons", Tao Hongjing incorporated the 365 kinds of drugs from the earliest canon "Shen Nong's Herbological Canon" with another 365 kinds of "subordinated drugs from famous physicians", including Wu Pu and Li Dangzhi etc. to compile his 7-volume "Collected variorum of herbological canon". Owing to the changes and modifications made on the term "subordinated drugs from famous physicians" by the prefaces of herbological works of successive ages, the misunderstandings that the other 365 appendant kinds of drug were derived from an available Ming Yi Bie Lu and that the preface by Tao Yinju of the Liang Dynasty in Zhenglei Bencao was the preface of the book Mingyi Bielu were thuw formed.
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Zhang M, Wang J, Wang M, Shang Z, Zhang J. [Ultrasonic measurement of the elastic properties of goat condyles]. Hua Xi Kou Qiang Yi Xue Za Zhi 2001; 19:83-5. [PMID: 12539417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE The purpose of this experiment is to investigate the elastic properties of goat mandibular condyles and to provide basic constants for biomechanical study of temporomandibular joint. METHODS A fresh goat mandible was adopted and the standard condyle specimen of 4 mm x 6 mm x 10 mm was obtained from it. The structure density of the condyle was determined according to Archimede's principle. The transmitting velocities of ultrasonic wave in different directions of goat condyles were measured by using the ultrasonic system, which was composed of a transmitting transducer of 1.25 MHz, a receiving transducer of 2.5 MHz, an ultrasonic analyzer (5052UA) and a digital storage oscilloscope (HP54601A). The elastic coefficients and technical constants could be calculated by elastic equations. RESULTS The structural density of the sample and the wave velocities in different directions of the condyle were both obtained by direct measurement. And then, nine elastic coefficients and all of the technical constants of orthotropic condyles were calculated. CONCLUSION 1. It is practicable to measure elastic properties of the condyle by using ultrasonic technique. 2. Goat condyles of the mandible are a type of anisotropic and linearly elastic material. 3. The direction perpendicular to the transverse ridge of the goat condyle has the highest Young's modulus. As to shear modulus, the direction along the transverse ridge shows the highest value.
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Affiliation(s)
- M Zhang
- College of Stomatology, Fourth Military Medical University
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Wen Z, Li Z, Shang Z, Cheng JP. On the direction and magnitude of radical substituent effects: the role of polar interaction on thermodynamic stabilities of benzylic C-H bonds and related carbon radicals. J Org Chem 2001; 66:1466-72. [PMID: 11312981 DOI: 10.1021/jo001668z] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The C-H bond dissociation enthalpies (BDEs) of polarized benzylic molecules, i.e., para-substituted phenylacetonitriles (PANs), and the spin variations of the radicals of the general type p-GC6H4CH*-Y were investigated using density functional theory (DFT) calculations. In contrast to the commonly observed S-type substituent effect (see text), the present work shows that there should be three (rather than one) primary patterns (i.e., S, O, and counter-O) for remote G to affect spin and radical stability, depending upon the polarity of the alpha-Y group. Correlation analyses reveal that both the direction and magnitude of spin/radical effects are quantitatively related to the intensity of polar interaction in radical system, as registered by either the calculated group charges of the phenyl ring (C(Ph)) or by the polar constant sigma(+)s (Figures 1-4). A unified platform (Scheme 1) to rationalize the apparent differences of radical substituent effect is proposed.
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Affiliation(s)
- Z Wen
- Department of Chemistry, Nankai University, Tianjin 300071, China
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Abstract
In 1985 an analysis of the Escherichia coli 16 S rRNA covariation-based structure model revealed a strong bias for unpaired adenosines. The same analysis revealed that the majority of the G, C, and U bases were paired. These biases are (now) consistent with the high percentage of unpaired adenosine nucleotides in several structure motifs. An analysis of a larger set of bacterial comparative 16 S and 23 S rRNA structure models has substantiated this initial finding and revealed new biases in the distribution of adenosine nucleotides in loop regions. The majority of the adenosine nucleotides are unpaired, while the majority of the G, C, and U bases are paired in the covariation-based structure model. The unpaired adenosine nucleotides predominate in the middle and at the 3' end of loops, and are the second most frequent nucleotide type at the 5' end of loops (G is the most common nucleotide). There are additional biases for unpaired adenosine nucleotides at the 3' end of loops and adjacent to a G at the 5' end of the helix. The most prevalent consecutive nucleotides are GG, GA, AG, and AA. A total of 70 % of the GG sequences are within helices, while more than 70 % of the AA sequences are unpaired. Nearly 50 % of the GA sequences are unpaired, and approximately one-third of the AG sequences are within helices while another third are at the 3' loop.5' helix junction. Unpaired positions with an adenosine nucleotide in more than 50 % of the sequences at the 3' end of 16 S and 23 S rRNA loops were identified and arranged into the A-motif categories XAZ, AAZ, XAG, AAG, and AAG:U, where G or Z is paired, G:U is a base-pair, and X is not an A and Z is not a G in more than 50 % of the sequences. These sequence motifs were associated with several structural motifs, such as adenosine platforms, E and E-like loops, A:A and A:G pairings at the end of helices, G:A tandem base-pairs, GNRA tetraloop hairpins, and U-turns.
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MESH Headings
- Adenosine/genetics
- Adenosine/metabolism
- Bacteria/genetics
- Base Composition
- Base Pairing
- Base Sequence
- Computational Biology
- Introns/genetics
- Molecular Sequence Data
- RNA, Ribosomal/chemistry
- RNA, Ribosomal/genetics
- RNA, Ribosomal/metabolism
- RNA, Ribosomal, 16S/chemistry
- RNA, Ribosomal, 16S/genetics
- RNA, Ribosomal, 16S/metabolism
- RNA, Ribosomal, 23S/chemistry
- RNA, Ribosomal, 23S/genetics
- RNA, Ribosomal, 23S/metabolism
- Sequence Alignment
- Software
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Affiliation(s)
- R R Gutell
- Institute for Cellular and Molecular Biology, University of Texas, 2500 Speedway, Austin, TX, 78712-1095, USA.
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Shang Z. [Discussion on sources of texts of Meng Sheng's Herbology of dietotherapy cited in Jinling edition of Compendium of materia medica]. Zhonghua Yi Shi Za Zhi 2000; 30:166-8. [PMID: 11624691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Most of the citations of Meng Sheng's Herbology of Dietotherapy in Compendium of Materia Medica are originated from the Daguan Herbology and Zhenghe Herbology. When comparing these sources of citations in Compendium of Materia Medica with the texts in Daguan and Zhenghe, it can be found that there are differences, In Compendium of Materia Medica, it is indicated that these sources marked "Meng Sheng's Herbology of Dietotherapy" are actually derived from other sources, while citations from other sources are marked "Meng Sheng's Herbology of Dietotherapy" which are not found in Classified Herbology (Zhenglei ben cao). This might be due to the editions of Daguan and Zhenghe Li Shizhen applied are different.
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Affiliation(s)
- Z Shang
- Yi jishan Hospital, Anhui 241001
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39
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Shang Z. [Discassion on the date of appearance of the title Shen nong ben caojing (Shennong's Herbal Classic)]. Zhonghua Yi Shi Za Zhi 1999; 29:135-8. [PMID: 11624095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
It is said, in general literatures, that the title of shen nong ben cao jing appeared in pre- Qin period. It can be negated, through studies on Han shu yi wen zhi (Biblie - graphies in Book of Han Dynasty), relics unearthed from Han tombs in Mawangdui, the history of nomencleture for ancient books, and the date of appearance of ancient canons, that the said - title first appeared in the pre - Qin period. The name of "ben cao" was first appeared in western Han dynasty. There were officials of necromaneer (fan shi) and ben cao in western Han dynasty. During Chengdi Emperor of Han, some seventy such officials were dismissed and returned to their homelands. Pingdi Emperor re-summoned these officials. Several scores of officials responded to the edict, among them, those responsible for ben cao complied a book on ben cao (herbology) and alleged it to be written by shennong so as to win confidence with the authority and to acquire the official title of ben cao dai zhao (Herbal Attendant) for themselves. It is, therefore, natural that the title of shen nong ben cao jing can only have appeared at the time of Herbal Attendant in Western Han dynasty.
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Affiliation(s)
- Z Shang
- Yijishan Hospital, Wuhu 241001
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40
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Shang Z. Study on the difference between Shennong's drug nature quoted by Wu Puu and by Shennong's drug in material medical in classified syndromes (Zheng). Zhonghua Yi Shi Za Zhi 1998; 28:161-4. [PMID: 11620485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Several questions were mentioned through the analysis and comparison of "Shennong's drug nature" (DN) as quoted by Wu Pu's Meteria Madica (WP) and Materia Medica of Classified Syndrome (Zheng) (ZL). These include: (1) The DN in ZL are incomplete, the "toxic nontoxic" terms were absent here; (2) There were different editions of ancient "Shennong's Canon of Materia Medica", carrying different numbers of drugs, including 365 kinds, 595, 441, 319 kinds respectively; (3) some of the drugs indicated as DN were, strangely, indicated as "drugs of supplemented Records" in ZL.
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Affiliation(s)
- Z Shang
- Yijishan Hospital, Wuhu, Anhui, Wuhu
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Abstract
Endotoxin was removed by affinity membranes with histidine immobilized as affinity ligand. Macropore cellulose membrane was prepared from filter paper by alkaline treatment and chemical crosslinking, and was used as matrix for the immobilization of affinity ligand. The matrix membrane was derived by hexamethylenediamine and activated by glutaraldehyde before histidine was immobilized. Membrane cartridges containing 40 or 80 sheets of affinity membrane were also prepared, which can be used to remove pyrogen from aqueous solutions. Using a cartridge with 40 sheets of affinity membrane, the endotoxin content in solution can be reduced to a minimum of 0.12 EU/mL.
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Affiliation(s)
- W Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China
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Swapna GV, Rios CB, Shang Z, Montelione GT. Application of multiple-quantum line narrowing with simultaneous 1H and 13C constant-time scalar-coupling evolution in PFG-HACANH and PFG-HACA(CO)NH triple-resonance experiments. J Biomol NMR 1997; 9:105-111. [PMID: 20683762 DOI: 10.1023/a:1018683920602] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Many triple-resonance experiments make use of one-bond heteronuclear scalar couplings toestablish connectivities among backbone and/or side-chain nuclei. In medium-sized(15-30 kDa) proteins, short transverse relaxation times of Calpha single-quantum stateslimit signal-to-noise (S/N) ratios. These relaxation properties can be improved usingheteronuclear multiple-quantum coherences (HMQCs) instead of heteronuclear single-quantumcoherences (HSQCs) in the pulse sequence design. In slowly tumbling macromolecules, theseHMQCs can exhibit significantly better transverse relaxation properties than HSQCs.However, HMQC-type experiments also exhibit resonance splittings due to multiple two- andthree-bond homo- and heteronuclear scalar couplings. We describe here a family of pulsed-field gradient (PFG) HMQC-type triple-resonance experiments using simultaneous 1H and13C constant-time (CT) periods to eliminate the t1 dependence of these scalar couplingeffects. These simultaneous CT PFG-(HA)CANH and PFG-(HA)CA(CO)NH HMQC-typeexperiments exhibit sharper resonance line widths and often have better S/N ratios than thecorresponding HSQC-type experiments. Results on proteins ranging in size from 6 to 30 kDashow average methine CalphaH HMQC:HSQC enhancement factors of 1.10 +/- 0.15, withabout 40% of the cross peaks exhibiting better S/N ratios in the simultaneous CT-HMQCversions compared with the HSQC versions.
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Affiliation(s)
- G V Swapna
- Center for Advanced Biotechnology and Medicine and Department of Molecular Biology and Biochemistry, Rutgers University, 679 Hoes Lane, Piscataway, NJ, 08854-5638, U.S.A
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Rios CB, Feng W, Tashiro M, Shang Z, Montelione GT. Phase labeling of C-H and C-C spin-system topologies: application in constant-time PFG-CBCA(CO)NH experiments for discriminating amino acid spin-system types. J Biomol NMR 1996; 8:345-350. [PMID: 8953221 DOI: 10.1007/bf00410332] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Triple-resonance experiments facilitate the determination of sequence-specific resonance assignments of medium-sized 13C,15N-enriched proteins. Some triple-resonance experiments can also be used to obtain information about amino acid spin-system topologies by proper delay tuning. The constant-time PFG-CBCA(CO)NH experiment allows discrimination between five different groups of amino acids by tuning (phase labeling) independently the delays for proton-carbon refocusing and carbon-carbon constant-time frequency labeling. The proton-carbon refocusing delay allows discrimination of spin-system topologies based on the number of protons attached to C alpha and C beta atoms (i.e. C-H phase labeling). In addition, tuning of the carbon-carbon constant-time frequency-labeling delay discriminates topologies based on the number of carbons directly coupled to C alpha and C beta atoms (i.e. C-C phase labeling). Classifying the spin systems into these five groups facilitates identification of amino acid types, making both manual and automated analysis of assignments easier. The use of this pair of optimally tuned PFG-CBCA(CO)NH experiments for distinguishing five spin-system topologies is demonstrated for the 124-residue bovine pancreatic ribonuclease A protein.
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Affiliation(s)
- C B Rios
- Center for Advanced Biotechnology, Rutgers University, Piscataway, NJ 08854-5638, USA
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Shang Z, Liu X. [Investigation on the various species of bulb of fritillary and its application]. Zhonghua Yi Shi Za Zhi 1995; 25:38-42. [PMID: 11639635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Through studies on ancient herbological works, it is claimed that the fritillary recorded in the Classic of Poet, Shennong's Herbology is not identical with the fritillary applied today. It belongs to Balbostemma paiculatum (Maxim). Frang of Cucurbitacea. Ming Yi Bie Lu is the earliest book that includes the fritillary of Lilliae as a remedy, with its species Fritillaria thunbergii mig. It can be sure that this should include the latter species. The fritillaria of Sichuan makes its appearance in Ben Cao Hui Yan of the Ming dynasty. It is derived from F. unibracteata et K. C. Hsia and F. cirrkosa D. Don.
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Shang Z, Isaac VE, Li H, Patel L, Catron KM, Curran T, Montelione GT, Abate C. Design of a "minimAl" homeodomain: the N-terminal arm modulates DNA binding affinity and stabilizes homeodomain structure. Proc Natl Acad Sci U S A 1994; 91:8373-7. [PMID: 7915838 PMCID: PMC44608 DOI: 10.1073/pnas.91.18.8373] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
This report investigates the sequence specificity requirements for homeodomain structure and DNA binding activity by the design and synthesis of a "minimAl" homeodomain (for minimalist design and alanine scanning mutagenesis) which contains the consensus residues and in which all nonconsensus residues have been replaced with alanine. The murine homeodomain Msx served as the prototype for the minimAl homeodomain, Ala-Msx. We show that Ala-Msx binds to DNA specifically, albeit with lower affinity than Msx. A derivative of the minimAl homeodomain, Ala-Msx(NT), which contains a native rather than an alanine-substituted N-terminal arm, has similar DNA binding affinity as Msx. We show that the native N-terminal arm stabilizes the tertiary structure of the minimAl homeodomain. Although Ala-Msx resembles a molten-globule protein, the structure of Ala-Msx(NT) is similar to Msx. The requirement for an intact N-terminal arm is not unique to the minimAl homeodomain, since the N-terminal arm also promotes high-affinity binding activity and appropriate tertiary structure of Msx. Therefore, the homeodomain "scaffold" consists of consensus residues, which are sufficient for DNA recognition, and nonconsensus residues in the N-terminal arm, which are required for optimal DNA binding affinity and appropriate tertiary structure. MinimAl design provides a powerful strategy to probe homeodomain structure and function. This approach should be of general utility to study the sequence specificity requirements for structure and function of other DNA-binding domains.
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Affiliation(s)
- Z Shang
- Department of Neuroscience and Cell Biology, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway
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Abstract
A method for the preparation of a p-aminobenzene sulphonyl ethyl containing crosslinked Sepharose 4B (ABSE-Sepharose 4B-CL) is described, trypsin, bovine serum albumin (BSA) and concanavalin A (Con A) were immobilized onto this matrix by diazotization. Conditions for the coupling reaction were investigated. The activity of immobilized trypsin reached 1.4 x 10(4) U/g, and 25 mg BSA can be coupled onto 1 g ABSE-Sepharose 4B-CL under the optimal conditions. An affinity medium with immobilized Con A as ligand was prepared by this method, and was used in the separation of a human monoclonal antibody.
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Affiliation(s)
- W Guo
- Dalian Institute of Chemical Physics, Academia Sinica, China
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Shang Z, Ebright YW, Iler N, Pendergrast PS, Echelard Y, McMahon AP, Ebright RH, Abate C. DNA affinity cleaving analysis of homeodomain-DNA interaction: identification of homeodomain consensus sites in genomic DNA. Proc Natl Acad Sci U S A 1994; 91:118-22. [PMID: 7904065 PMCID: PMC42897 DOI: 10.1073/pnas.91.1.118] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
We have incorporated the DNA-cleaving moiety o-phenanthroline-copper at amino acid 10 of the Msx-1 homeodomain, and we have analyzed site-specific DNA cleavage by the resulting Msx-1 derivative. We show that amino acid 10 of the Msx-1 homeodomain is close to the 5' end of the consensus DNA site 5'-(C/G)TAATTG-3' in the Msx-1-DNA complex. Our results indicate that the orientation of the Msx-1 homeodomain relative to DNA is analogous to the orientation of the engrailed and Antennapedia homeodomains. We show further that DNA affinity cleaving permits identification of consensus DNA sites for Msx-1 in kilobase DNA substrates. The specificity of the approach enabled us to identify an Msx-1 consensus DNA site within the transcriptional control region of the developmental regulatory gene Wnt-1. We propose that incorporation of o-phenanthroline-copper at amino acid 10 of a homeodomain may provide a generalizable strategy to determine the orientation of a homeodomain relative to DNA and to identify homeodomain consensus DNA sites in genomic DNA.
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Affiliation(s)
- Z Shang
- Center for Advanced Biotechnology and Medicine, Piscataway, NJ 08854
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Abstract
Polysulphone (PS) was chemically modified by acrylation-amination and by chloromethylation-amination, respectively. An ultrafiltration membrane of chemically modified polysulphone (CMPS) was prepared by the phase inversion method. Trypsin was then covalently bonded onto the CMPS membrane by diazotization. The activity of immobilized trypsin reaches up to 10200 U/g; 15 mg trypsin was immobilized on 1 g CMPS membrane. Separation of soybean trypsin inhibitor was carried out on the affinity membrane, yielding 6.5 mg pure trypsin inhibitor in one run. The enzyme membrane has good activity and stability.
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Affiliation(s)
- W Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences
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49
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Abstract
Xenopus transcription factor IIIA (TFIIIA) contains two tightly bound intrinsic Zn2+ ions that are released through treatment with either p-(hydroxymercuri)benzenesulfonate (PMPS) or diethyl pyrocarbonate (DEP) as monitored by the metallochromic indicator 4-(2-pyridylazo)resorcinol (PAR). The inactivation of TFIIIA by DEP as detected by an in vitro 5S RNA gene transcription assay was correlated with the extent of modification of histidine residues and Zn2+ release. Following reaction with PMPS, the 7S particle was dissociated into free TFIIIA and 5S RNA. This dissociation could be correlated with the extent of modification of cysteine residues as well as the Zn2+ release. The dissociation of the 7S particle was reversed by the addition of excess thiol reagent. However, the reversibility could be inhibited by EDTA, suggesting that Zn2+ was required for the binding of TFIIIA to 5S RNA. In the presence of PMPS- or DEP-modified TFIIIA or Zn2+-depleted TFIIIA, the fluorescence emission maximum of the hydrophobic probe, 8-anilinonaphthalenesulfonate, was blue-shifted by 30 nm, while only less than a 10-nm blue shift was observed in the presence of either the 7S particle or TFIIIA. These results indicate that the two Zn2+ ions in TFIIIA are coordinated with the cysteine and histidine residues and are required for maintenance of the proper conformation of TFIIIA.
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Affiliation(s)
- Z Shang
- Department of Pharmacological Sciences, School of Medicine, State University of New York, Stony Brook 11794
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