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Shi P, Wang Y, Liang H, Hou Y, Chen D, Zhao G, Dai P, Xia Y, Feng Y, Cram DS, Kong X. The potential of expanded noninvasive prenatal screening for detection of microdeletion and microduplication syndromes. Prenat Diagn 2021; 41:1332-1342. [PMID: 34181751 DOI: 10.1002/pd.6002] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 06/11/2021] [Accepted: 06/14/2021] [Indexed: 11/10/2022]
Abstract
OBJECTIVES To evaluate the clinical potential of a higher resolution noninvasive prenatal screening (NIPS-Plus) test for detection of microdeletion/microduplication syndromes (MMS) in addition to common aneuploidies. METHODS In a multicenter prospective study, 37,002 pregnant women with unremarkable first-trimester ultrasound scans had a NIPS-Plus test. Ultrasound screen positive women were not included in this study. RESULTS Of 36,970 ultrasound negative women there were 291 NIPS-Plus screen positive results indicating 237 aneuploidies and 54 MMS. Following amniocentesis, 171 (72%) were confirmed as genuine, comprising 3 T13s, 10 T18s, 61 T21s, 70 SCAs and 27 MMS. The PPV for MMS with unremarkable ultrasound findings was 50%. Routine clinical examination of children born from NIPS-Plus negative pregnancies revealed no obvious signs of chromosome disease syndromes at one year of age. CONCLUSIONS NIPS-Plus has the potential for clinical utility not only for routine aneuploid screening but also for MMS that do not show overt signs during early pregnancy ultrasound screening. We suggest that ultrasound with NIPS-Plus in combination with appropriate counselling could be considered as a comprehensive first-tier prenatal screening approach for all pregnant women.
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Affiliation(s)
- Panlai Shi
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yuan Wang
- Berry Genomics Corporation, Beijing, China
| | | | - Yaqin Hou
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Duo Chen
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ganye Zhao
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Peng Dai
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yanjie Xia
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yin Feng
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | | | - Xiangdong Kong
- Genetic and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Lin X, Hua Y, Gu S, Lv L, Li X, Chen P, Dai P, Hu Y, Liu A, Li J. kataegis: an R package for identification and visualization of the genomic localized hypermutation regions using high-throughput sequencing. BMC Genomics 2021; 22:440. [PMID: 34118871 PMCID: PMC8196519 DOI: 10.1186/s12864-021-07696-x] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 05/10/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Genomic localized hypermutation regions were found in cancers, which were reported to be related to the prognosis of cancers. This genomic localized hypermutation is quite different from the usual somatic mutations in the frequency of occurrence and genomic density. It is like a mutations "violent storm", which is just what the Greek word "kataegis" means. RESULTS There are needs for a light-weighted and simple-to-use toolkit to identify and visualize the localized hypermutation regions in genome. Thus we developed the R package "kataegis" to meet these needs. The package used only three steps to identify the genomic hypermutation regions, i.e., i) read in the variation files in standard formats; ii) calculate the inter-mutational distances; iii) identify the hypermutation regions with appropriate parameters, and finally one step to visualize the nucleotide contents and spectra of both the foci and flanking regions, and the genomic landscape of these regions. CONCLUSIONS The kataegis package is available on Bionconductor/Github ( https://github.com/flosalbizziae/kataegis ), which provides a light-weighted and simple-to-use toolkit for quickly identifying and visualizing the genomic hypermuation regions.
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Affiliation(s)
- Xue Lin
- Department of Bioinformatics, School of Biomedical Engineering and Informatics, Nanjing Medical University, 211166, Nanjing, People's Republic of China.
| | - Yingying Hua
- Traditional Chinese Medicine Department, Fuxing Hospital, Capital Medical University, 100038, Beijing, People's Republic of China
| | - Shuanglin Gu
- Key Laboratory of DGHD, MOE, School of Life Science and Technology, Southeast University, 210096, Nanjing, People's Republic of China
| | - Li Lv
- Key Laboratory of DGHD, MOE, School of Life Science and Technology, Southeast University, 210096, Nanjing, People's Republic of China
| | - Xingyu Li
- Key Laboratory of DGHD, MOE, School of Life Science and Technology, Southeast University, 210096, Nanjing, People's Republic of China
| | - Pin Chen
- Key Laboratory of DGHD, MOE, School of Life Science and Technology, Southeast University, 210096, Nanjing, People's Republic of China
| | - Peng Dai
- Department of Bioinformatics, School of Biomedical Engineering and Informatics, Nanjing Medical University, 211166, Nanjing, People's Republic of China
| | - Yunyun Hu
- Key Laboratory of DGHD, MOE, School of Life Science and Technology, Southeast University, 210096, Nanjing, People's Republic of China
| | - Anna Liu
- Key Laboratory of DGHD, MOE, School of Life Science and Technology, Southeast University, 210096, Nanjing, People's Republic of China
| | - Jian Li
- Key Laboratory of DGHD, MOE, School of Life Science and Technology, Southeast University, 210096, Nanjing, People's Republic of China.
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103
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Dai P, Feng Y, Zhu C, Kong X. [Analysis of gene inversion in Hemophilia A by Nanopore sequencing]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2021; 38:521-525. [PMID: 34096017 DOI: 10.3760/cma.j.cn511374-20200630-00481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To detect gene inversion in two pedigrees affected with Hemophilia A by using Nanopore sequencing technology. METHODS Peripheral blood samples were taken from members of the two pedigrees. Following extraction of genome DNA, genetic variants of the carriers were detected by Nanopore sequencing and subjected to bioinformatic analysis. RESULTS Nanopore sequencing has identified the niece of the proband of the pedigree 1 as carrier of Hemophilia A Inv22, and the mother of the proband of the pedigree 2 as carrier of Hemophilia A Inv1, which was consistent with clinical findings. Breakpoint sites in both pedigrees were accurately mapped. Statistical analysis of the sequencing results revealed a large number of variations in the carriers' genomes including deletions, duplications, insertions, inversions and translocations. CONCLUSION Nanopore sequencing can be used to analyze gene inversions associated with Hemophilia A, which also provided a powerful tool for the diagnosis of diseases caused by gene inversions.
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Affiliation(s)
- Peng Dai
- Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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104
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Li S, Wen Z, Ghalandari B, Zhou T, Warden AR, Zhang T, Dai P, Yu Y, Guo W, Liu M, Xie H, Ding X. Single-Cell Immunoblotting based on a Photoclick Hydrogel Enables High-Throughput Screening and Accurate Profiling of Exogenous Gene Expression. Adv Mater 2021; 33:e2101108. [PMID: 33899289 DOI: 10.1002/adma.202101108] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Fast and accurate profiling of exogenous gene expression in host cells is crucial for studying gene function in cellular and molecular biology, but still faces the challenge of incomplete co-expression of reporter genes and target genes. Here, a single-cell transfection analysis chip (scTAC) is presented, which is based on the in situ microchip immunoblotting method, for rapid and accurate analysis of exogenous gene expression in thousands of individual host cells. scTAC not only can assign information of exogenous gene activity to specific transfected cells, but enables the acquisition of continuous protein expression even in low co-expression scenarios. It is demonstrated that scTAC can reveal the relationship of expression level between reporter genes and target genes, which is helpful for evaluating transient transfection strategy efficiency. The advantages of this method for the study of fusion protein expression and downstream protein expression in signaling pathway in rare cells are shown. Empirically, an EGFP-TSPAN8 fusion plasmid is transfected into MCF-7 breast cancer cells and the expressions of two cancer stemness biomarkers (ALDHA1 and SOX2) are analyzed. The scTAC method clearly reveals an interesting phenomenon that transfected adherent MCF-7 cells exhibit some stem cell characteristics, but they do not have stem cell appearance.
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Affiliation(s)
- Shanhe Li
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Ze Wen
- State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Behafarid Ghalandari
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Tianhao Zhou
- Department of Oncology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Antony R Warden
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Ting Zhang
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Peng Dai
- Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Youyi Yu
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Wenke Guo
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Mofang Liu
- State Key Laboratory of Molecular Biology, State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, 200031, China
| | - Haiyang Xie
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Xianting Ding
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China
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Mo J, Zheng T, Lei L, Dai P, Liu J, He H, Shi J, Chen X, Guo T, Yuan B, Ji G. MicroRNA-1253 Suppresses Cell Proliferation Migration and Invasion of Osteosarcoma by Targeting MMP9. Technol Cancer Res Treat 2021; 20:1533033821995278. [PMID: 34036868 PMCID: PMC8161890 DOI: 10.1177/1533033821995278] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Purpose: MicroRNAs play an important role in osteosarcoma (OS) development and progress. Although miR-1253 was considered as a tumor-inhibitor in some cancers, it’s function in the OS is not clear. Methods: In our study, we examined the expression of miR-1253 in OS cells and osteoblast cells using quantitative real-time PCR. The proliferation of OS cells was measured by BrdU assay, and we performed transwell to detect migration and invasion of OS cells. Meanwhile, EMT proteins were tested by western blot. We used Bioinformatics to predict the target genes of miR-1253 and found out Matrix metalloproteinases9 (MMP9) was one of that. The direct combination between miR-1253 and MMP9 was verified by double luciferase reporting experiment. Quantitative real-time PCR and western blot were used to detect the expression of MMP9. Results: We found that the expression level of miR-1253 in OS cells was significantly lower than that in osteoblast cells. Overexpression of miR-1253 could significantly inhibit OS cell proliferation, migration, invasion and EMT. And then, MMP9 was predicted as a downstream target of miR-1253 by Bioinformatics analysis. Further experiments showed that miR-1253 could reduce the protein level of MMP9 by directly binding to the 3’-UTR of MMP9. Afterward, we performed a rescue experiment, in which both MMP9 and miR-1253 were overexpressed. Compared with the groups overexpressed miR-1253 alone, cell proliferation, migration and invasion in co-overexpression groups were improved. Conclusions: In summary, these results suggested that miR-1253 down-regulated in OS cells, and could suppress the proliferation, migration and invasion of OS cells. Its molecular regulatory mechanism was that inhibits the expression of the downstream target gene MMP9 by directly binding, thus affect OS cell functions. Therefore, miR-1253 has the potential to become a biomarker and therapeutic target for OS therapy.
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Affiliation(s)
- Jianwen Mo
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Tiansheng Zheng
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Li Lei
- Department of Dental, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Peng Dai
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Jun Liu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Huabin He
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Jin Shi
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Xi Chen
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Tianting Guo
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Bin Yuan
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
| | - Guanglin Ji
- Department of Orthopedic Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, People's Republic of China
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106
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Su Y, Shen WD, Liu J, Liu MB, Xie YL, Wang WJ, Dai P. [Reconstruction of complex tissue defects in temporal region: report of 3 cases]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:487-492. [PMID: 34011003 DOI: 10.3760/cma.j.cn115330-20200622-00522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To discuss the techniques and repairing methods of various degree of compound tissue defects in the auriculotemporal region. Methods: Retrospective analysis was conducted on three cases of different repairing methods for huge compound tissue defects in different degrees in the auriculotemporal region after the resection of the malignant tumor or sinus tract due to repeated infection in our hospital. Results: Following total removal of the tumors or sinus tract in all patients, we applied retroauricular lingual flap transfer repairing, latissimus dorsi flap free transfer repairing and vascular anastomosis, scalp tissue expansion in stage Ⅰ, then repairing the lesion with expanded scalp and filling the huge mastoid cavity with abdominal fat in stage Ⅱ, respectively, according to the characteristics of compound tissue defects in the auriculotemporal region. All free flaps survived well. Conclusions: The anatomy of the auricular-temporal area is complex and involves important vascular and neural structures of head and neck and lateral skull base. The huge composite tissue defect following auriculotemporal region surgery, which is composed of skin, muscle and bone tissue, needs to be repaired in one stage. Therefore, flexible repairing methods should be chosen based on different situations, for attaining the goal of completely removing tumor and lesions, and then, covering the operation cavity.
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Affiliation(s)
- Y Su
- Department of Otorhinolaryngology Head and Neck Surgery, Hainan Hospital of PLA General Hospital, Sanya 572013, China Clinical Research Center for Otolaryngologic Diseases, Hainan 572013, China Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China National Clinical Research Center for Otolaryngologic Diseases, Beijing 100853, China
| | - W D Shen
- Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China National Clinical Research Center for Otolaryngologic Diseases, Beijing 100853, China
| | - J Liu
- Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China National Clinical Research Center for Otolaryngologic Diseases, Beijing 100853, China
| | - M B Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Hainan Hospital of PLA General Hospital, Sanya 572013, China Clinical Research Center for Otolaryngologic Diseases, Hainan 572013, China Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China National Clinical Research Center for Otolaryngologic Diseases, Beijing 100853, China
| | - Y L Xie
- Department of Otorhinolaryngology Head and Neck Surgery, Hainan Hospital of PLA General Hospital, Sanya 572013, China Clinical Research Center for Otolaryngologic Diseases, Hainan 572013, China Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China National Clinical Research Center for Otolaryngologic Diseases, Beijing 100853, China
| | - W J Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Hainan Hospital of PLA General Hospital, Sanya 572013, China Clinical Research Center for Otolaryngologic Diseases, Hainan 572013, China Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China National Clinical Research Center for Otolaryngologic Diseases, Beijing 100853, China
| | - P Dai
- Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China National Clinical Research Center for Otolaryngologic Diseases, Beijing 100853, China
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Gao N, Chang J, Dai P, Zhu Z, You H. One-sampling and Rapid Analysis of Cancer Biomarker on A Power-free and Low-cost Microfluidic Chip. ANAL SCI 2021; 37:1695-1700. [PMID: 34024865 DOI: 10.2116/analsci.21p098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Alpha-fetoprotein (AFP) is an important disease biomarker, relating to cancers such as hepatocarcinomas and gastric cancer. However, traditional methods are time-consuming, relied on bulky instruments and trained professionals, cannot satisfy the demand for low cost and point-of-care testing (POCT). In this study, a power-free POCT device was developed for the rapid and low-cost detection of AFP via one-sampling. Based on the principle of sandwich immunofluorescence, the chip is capable of automatically accomplishing on-chip mixing, labeling and capturing procedures, which only require that operator add 40 μL sample into the chip one time. The proposed device is capable of sensitively detecting human AFP in FBS with a dynamic range of 10 - 1000 ng/mL and LOD (1.88 ng/mL) within a short time of 3 min. Predictably, our method holds a great potential to be applied in the POC diagnostics of proteins, especially for some regions that are resource-limited.
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Affiliation(s)
- Nailong Gao
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China.,Institute of Intelligent Machines, Chinese Academy of Sciences
| | - Jianguo Chang
- Institute of Intelligent Machines, Chinese Academy of Sciences
| | - Peng Dai
- School of Mechanical Engineering, Guangxi University
| | - Ziming Zhu
- School of Mechanical Engineering, Guangxi University
| | - Hui You
- School of Mechanical Engineering, Guangxi University
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108
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Chen S, Dai P, Zhao G, Zhang F, Guo W, Gao S, Kong X. [Results of non-invasive prenatal testing for 2473 women with twin pregnancy]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2021; 38:313-316. [PMID: 33834454 DOI: 10.3760/cma.j.cn511374-20200521-00368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To assess the value of non-invasive prenatal testing (NIPT) for the detection of fetal chromosomal aneuploidies in women with twin pregnancy. METHODS A total of 2473 women with twin pregnancy underwent the NIPT test to assess the risk for fetal chromosomal aneuploidies from January 2016 to September 2019. Those with a high risk by NIPT were confirmed by amniocentesis or chorionic villus sampling. All cases were followed up to evaluate the positive prediction value of NIPT for twin pregnancies. RESULTS Among the 2473 women, the NIPT test has identified 31 cases (1.25%) with a high risk for fetal chromosomal aneuploidies, which included 5 cases of trisomy 21, 1 case of chromosome 21 deletion, 4 cases of trisomy 18, 7 cases of sex chromosome abnormality and 14 cases of microdeletion and microduplication. By invasive prenatal diagnosis or chromosomal karyotyping analysis of neonates, 5 cases of trisomy 21, 3 cases of trisomy 18, 1 case of sex chromosome abnormality, and 2 cases of microdeletion and microduplication were confirmed, which yielded a positive predictive value of 100%, 75%, 25% and 25%, respectively. CONCLUSION NIPT can be used for the screening of fetal chromosomal aneuploidies in women with twin pregnancy with high accuracy. The method is non-invasive, safe and effective for the screening of fetal chromosomal aneuploidies, in particular trisomy 21.
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Affiliation(s)
- Shaoning Chen
- Genetic and Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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109
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Ren Y, Dai P, Chen C, Duan H, Kong X. [Genetic testing and prenatal diagnosis of two pedigrees affected with Huntington disease]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2021; 38:446-449. [PMID: 33974252 DOI: 10.3760/cma.j.cn511374-20200323-00192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To explore the genetic basis for two Chinese pedigrees affected with Huntington disease and provide prenatal diagnosis for them. METHODS Peripheral venous blood samples were collected from the probands. PCR and capillary gel electrophoresis were used to determine the number of CAG repeats in their IT15 gene. Pre-symptomatic testing was offered to their children and relatives, and prenatal diagnosis was provided to three pregnant women from the two pedigrees. RESULTS The two probands, in addition with three asymptomatic members, were found to have a (CAG)n repeat number greater than 40. Upon prenatal diagnosis, the numbers of CAG repeats in two fetuses from pedigree 1 were determined as (16, 19) and (18, 19), both were within the normal range. A fetus from pedigree 2 was found to have a CAG repeat number of (15, 41), which exceeded the normal range. CONCLUSION Genetic testing can facilitate the diagnosis of Huntington disease and avoid further birth of affected children.
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Affiliation(s)
- Yilin Ren
- Center of Genetics and Prenatal Diagnosis, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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Zhao Y, Zhao CL, Yang X, Chi H, Dai P, Desneux N, Benelli G, Zang LS. Yacon as an alternative host plant for Encarsia formosa mass-rearing: validating a multinomial theorem for bootstrap technique in life table research. Pest Manag Sci 2021; 77:2324-2336. [PMID: 33423378 DOI: 10.1002/ps.6259] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/14/2020] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Yacon (Smallanthus sonchifolius) is a broadleaf host plant suitable for rearing the greenhouse whitefly, Trialeurodes vaporariorum (Westwood). Here, the possibility of using yacon as an alternative host plant for production of the parasitoid, Encarsia formosa Gahan, one of the most important natural enemies of whiteflies, was explored. Data on the demographic characteristics, parasitism rate, and host-feeding rate were collected and analyzed using the TWOSEX-MSChart, CONSUME-MSChart, and TIMING-MSChart computer programs, and then contrasted with comparable data from the more commonly utilized host plant, tobacco. RESULTS Higher fecundity (F) (190.13 eggs/female) and more oviposition days (Od ) (16.60 days) were observed in E. formosa when yacon was used as the host plant for rearing T. vaporariorum, compared with when tobacco was used (F = 150.13 eggs/female, Od = 15.27 days). The intrinsic rate of increase (r), finite rate of increase (λ), and net reproduction rate (R0 ) were significantly higher in E. formosa parasitizing T. vaporariorum reared on yacon compared with those parasitizing tobacco-reared T. vaporariorum. Furthermore, the net host-feeding rate (C0 = 40.87 prey/parasitoid), net killing rate (Z0 = 239.73 prey/parasitoid), and finite killing rate ( υ = 0.2560/day) for E. formosa on yacon-reared whiteflies were significantly higher than those from tobacco-reared whiteflies. CONCLUSION Our results showed that yacon is more suitable than tobacco as a host plant for mass-rearing E. formosa for biological control programs to manage whiteflies. An innovative application of the multinomial theorem for calculating the exact probability of bootstrap samples in life table research was also introduced. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Yue Zhao
- Jilin Agricultural University, Changchun, China
| | | | | | - Hsin Chi
- College of Plant Protection, Shandong Agricultural University, Taian, China
| | - Peng Dai
- Jilin Agricultural University, Changchun, China
| | | | - Giovanni Benelli
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
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111
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Tuang S, Dieppa-Matos D, Zhang C, Shugrue CR, Dai P, Loas A, Pentelute BL. A reactive peptide interface for site-selective cysteine bioconjugation. Chem Commun (Camb) 2021; 57:3227-3230. [PMID: 33645592 DOI: 10.1039/d1cc00095k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We report aqueous, site-selective modification of proteins using a reactive peptide interface comprising a nine-residue sequence. This interface is the fastest (second-order rate constant of 152 M-1 s-1) catalyst-free, cysteine-based method for modifying proteins available to date, and enables near-quantitative labeling of antibodies in cell lysate.
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Affiliation(s)
- Suan Tuang
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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Yu X, Chen Y, Luo Q, Li Y, Dai P, Xia Q, Liu F, Zhang W. Selective Radical N−H Activation: the Unprecedented Harnessing of Formamide with S
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for N−S−N Bonds Construction. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiang Yu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Yu Chen
- State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Qian Luo
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Yufei Li
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Peng Dai
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Qing Xia
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Fang Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Wei‐Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
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113
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Xia Y, Shi P, Hou Y, Chen D, Dai P, Zhao X, Kong X. [Analysis of genetic variants in five pedigrees affected with Dysferlinopathy]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2021; 38:205-209. [PMID: 33751525 DOI: 10.3760/cma.j.cn511374-20200228-00112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
OBJECTIVE To analyze the clinical phenotype and genetic variants in five Chinese pedigrees affected with Dysferlinopathy. METHODS Next generation sequencing (NGS) was carried out for the probands from the five pedigrees. Suspected variants were validated by Sanger sequencing. Pathogenicity of the variants was assessed based on the standards and guidelines by the American College of Medical Genetics and Genomics (ACMG). RESULTS Ten DYSF gene variants (including 5 frameshift variants, 3 splicing variants, 1 missense variant and 1 nonsense variant) were detected. Among these, c.1375dupA (p.Met459Asnfs*15), c.610C>T (p.Arg204X), c.1180+5G>A and c.1284+2T>C were known to be pathogenic, while c.4008_4010delCCTinsAC (p.Leu1337Argfs*8), c.1137_1169del (p.379_390del), c.754A>G(p.Thr252Ala), c.1175_1176insGCAGAGTG (p.Met394Serfs*7), c.3114_3115insCGGC (p.Arg1040Profs*74) and c.1053+3G>C were unreported previously. Of the six novel variants, c.1137_1169del, c.1175_1176insGCAGAGTG and c.3114_3115insCGGC were predicted as pathogenic (PVS1+PM2+PM3), c.4008_4010delCCTinsAC as likely pathogenic (PVS1+PM2), c.754A>G and c.1053+3G>C as variants of uncertain significance based on the ACMG standards and guidelines. CONCLUSION Variants of the DYSF gene probably underlay Dysferlinopathy in the patients among the five pedigrees. Above finding has enriched the spectrum of DYSF gene variants.
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Affiliation(s)
- Yanjie Xia
- Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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114
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Gu Y, Dai P, Zhang W, Su Z. Fish bone-derived interconnected carbon nanofibers for efficient and lightweight microwave absorption. SN Appl Sci 2021. [DOI: 10.1007/s42452-021-04204-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
AbstractIn this work, we demonstrated a simple method for preparing three-dimensional interconnected carbon nanofibers (ICNF) derived from fish bone as an efficient and lightweight microwave absorber. The as-obtained ICNF exhibits excellent microwave absorption performance with a maximum reflection loss of –59.2 dB at the filler content of 15 wt%. In addition, the effective absorption bandwidth can reach 4.96 GHz at the thickness of 2 mm. The outstanding microwave absorption properties can be mainly ascribed to its well-defined interconnected nanofibers architecture and the doping of nitrogen atoms, which are also better than most of the reported carbon-based absorbents. This work paves an attractive way for the design and fabrication of highly efficient and lightweight electromagnetic wave absorbers.
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115
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Abstract
Cochlear implantation is currently the most effective treatment for patients with severe-to-profound sensorineural hearing loss. How to achieve minimally invasive treatment, preserve the residual hearing, and further improve curative effect and reduce surgical complications is the goal of cochlear implantation practice. This article introduces the minimally invasive cochlear implantation technique in terms of the idea of minimally invasive operation, the advantages of electric acoustic stimulation, the key points of electrode implantation technique, the design of surgical incision, and the precise processing of perioperative period. This technique not only has the merits of less operative damage and better hearing and speech rehabilitation after surgery, but also reserves favorable structures and function for the future application of gene therapy and hair cell regeneration technique. Therefore, it is strongly recommended for further promotion in clinical practice.
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Affiliation(s)
- Y Y Yuan
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School/National Clinical Research Center for Otolaryngologic Diseases/State Key Lab of Hearing Science, Ministry of Education/Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
| | - P Dai
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School/National Clinical Research Center for Otolaryngologic Diseases/State Key Lab of Hearing Science, Ministry of Education/Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
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116
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Xia Q, Li Y, Cheng L, Liang X, Cao C, Dai P, Deng H, Zhang W, Wang Q. Electron Donor-Acceptor Complex-Initiated Photochemical Cyanation for the Preparation of α-Amino Nitriles. Org Lett 2020; 22:9638-9643. [PMID: 33285068 DOI: 10.1021/acs.orglett.0c03703] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An electron donor-acceptor complex-initiated α-cyanation of tertiary amines has been described. The reaction protocol provides a novel method to synthesize various α-amino nitriles under mild conditions. The reaction can proceed smoothly without the presence of photocatalysts and transition metal catalysts, and either oxidants are unnecessary or O2 is the only oxidant. The practicality of this method is showcased not only by the late-stage functionalization of natural alkaloid derivatives and pharmaceutical intermediate, but also by the applicability of a stop-flow microtubing reactor.
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Affiliation(s)
- Qing Xia
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yufei Li
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lan Cheng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xin Liang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Chenlin Cao
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Peng Dai
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Hongping Deng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Weihua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, China
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117
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Dai P, Liang M, Ma X, Luo Y, He M, Gu X, Gu Q, Hussain I, Luo Z. Highly Efficient, Environmentally Friendly Lignin-Based Flame Retardant Used in Epoxy Resin. ACS Omega 2020; 5:32084-32093. [PMID: 33344863 PMCID: PMC7745397 DOI: 10.1021/acsomega.0c05146] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 11/26/2020] [Indexed: 05/10/2023]
Abstract
We prepared novel flame retardants with concurrent excellent smoke-suppression properties based on lignin biomass modified by functional groups containing N and P. Each lignin-based flame retardant (Lig) was quantitatively added to a fixed amount of epoxy resin (EP), to make a Lig/EP composite. The best flame retardancy was achieved by a Lig-F/EP composite with elevated P content, achieving a V-0 rating of the UL-94 test and exhibiting excellent smoke suppression, with substantial reduction of total heat release and smoke production (by 46.6 and 53%, respectively). In this work, we characterized the flame retardants and the retardant/EP composites, evaluated their performances, and proposed the mechanisms of flame retardancy and smoke suppression. The charring layer of the combustion residual was analyzed using SEM and Raman spectroscopy to support the proposed mechanisms. Our work provides a feasible method for lignin modification and applications of new lignin-based flame retardants.
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Affiliation(s)
- Peng Dai
- College
of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
| | - Mengke Liang
- College
of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
| | - Xiaofeng Ma
- College
of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
- Institute
of Polymer Materials, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
| | - Yanlong Luo
- College
of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
- Institute
of Polymer Materials, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
| | - Ming He
- College
of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
- Institute
of Polymer Materials, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
| | - Xiaoli Gu
- College
of Chemical Engineering, Nanjing Forestry
University, 159 Longpan Road, Nanjing 210037, P. R. China
| | - Qun Gu
- Department
of Chemistry, Edinboro University of Pennsylvania, 230 Scotland Road, Edinboro, Pennsylvania 16444, United States
| | - Imtiaz Hussain
- College
of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
| | - Zhenyang Luo
- College
of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
- Institute
of Polymer Materials, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, P. R. China
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118
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Yi-Lin Gong, Dai P, Chen Y, Ding S, Liu J. Synthesis, Crystal Structure and Biological Activity of 7-(4-Methylpiperazin-1-Yl)-5-[4-(Trifluoromethyl)Phenyl]pyrazolo[1,5-a]Pyrimidine-3-Carbonitrile. CRYSTALLOGR REP+ 2020. [DOI: 10.1134/s1063774520070068] [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: 11/23/2022]
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119
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Zhao JH, Dai P, Zhu RN, Shi PL, Meng JJ, Kong XD. [Confirmation and analysis of 2 398 positive results of cell-free fetal DNA]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:679-684. [PMID: 33120479 DOI: 10.3760/cma.j.cn112141-20200307-00185] [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 explore the clinical application value and accuracy of cell-free fetal DNA (cff-DNA) technique in prenatal screening. Methods: The results of quantitative fluorescent PCR (QF-PCR) and karyotype of amniotic fluid cells were analyzed retrospectively in 2 398 monocyesis pregnant women who had been amniocentesis at the First Affiliated Hospital of Zhengzhou University from May 2013 to December 2019, and the results of 359 cases who had been examined by single-nucleotide polymorphism array (SNP array). Results: Cff-DNA test of 2, 398 cases indicated 987 cases of trisomy 21, 351 cases of trisomy 18, 135 cases of trisomy 13, 566 cases of sex chromosome abnormality, and 359 cases of other chromosome abnormality. Chromosome karyotype analysis detected 826 cases of trisomy 21, 213 cases of trisomy 18, 17 cases of trisomy 13, 221 cases of sex chromosome abnormality, and 26 cases of other chromosome abnormality. The detection rate were 83.69% (826/987), 60.68% (213/351), 12.59% (17/135), 39.04% (221/566) and 7.24% (26/359), respectively. QF-PCR detected 1 046 cases of trisomy and 188 cases of sex chromosomes abnormality, and the detection rate was 99.05% (1 046/1 056) and 85.07% (188/221), respectively. Compared with the abnormal number detected by chromosome karyotype analysis, 10 cases of trisomeric chimerism and 24 cases of sex chromosome were missed by QF-PCR. Among the 359 other chromosomal abnormalities detected by SNP array, 64 cases were consistent with the results of cff-DNA, and the detection rate was 17.83% (64/359), which was 10.59% higher than the karyotype result. Conclusions: Karyotype analysis is the gold standard for diagnosing chromosomal abnormalities. QF-PCR could diagnose common chromosome aneuploidy rapidly and accurately, and it could be used as an auxiliary detection technique for karyotype analysis. The incidence of sex chromosome chimerism is high, so missed diagnosis should be warned. SNP array could be given priority to verify chromosome microdeletion or microduplication detected by cff-DNA.
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Affiliation(s)
- J H Zhao
- The Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - P Dai
- The Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - R N Zhu
- The Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - P L Shi
- The Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - J J Meng
- The Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - X D Kong
- The Genetics and Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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120
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Zhang P, Dai P, Deng G, Luo L, Huang Q, Cai L. Dosimetric Analysis of DVO and PO Algorithm in Pediatric Craniospinal Irradiation With Intensity-Modulated Radiotherapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2392] [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: 11/28/2022]
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121
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Dai P, Zhu C, Zhao G, Dong X. [Application of bionano optical mapping for the diagnosis of a 16p11.2-p12.2 microdeletion]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2020; 37:1167-1171. [PMID: 32924127 DOI: 10.3760/cma.j.cn511374-20190906-00458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To delineate chromosomal aberration caused by structural chromosomal abnormalities with bionano optical mapping. METHODS Chromosomal karyotyping, bionano optical mapping and copy number variation sequencing (CNV-seq) were used to delineate the chromosomal aberration carried by a patient. RESULTS The patient was found to have an anomalous chromosome 16 by karyotyping analysis, which was verified by bionano optical mapping and CNV-seq as loss of heterozygosity at 16p11.2-p12.2. CONCLUSION Bionano optical mapping has provided a novel tool for the detection and diagnosis of structural chromosomal aberrations.
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Affiliation(s)
- Peng Dai
- Genetic and Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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Affiliation(s)
- Peng Dai
- Jiangsu Key Laboratory of Pesticide Science College of Sciences Nanjing Agricultural University Nanjing 210095 China) E-mail address
| | - Chenxiao Li
- Jiangsu Key Laboratory of Pesticide Science College of Sciences Nanjing Agricultural University Nanjing 210095 China) E-mail address
| | - Yufei Li
- Jiangsu Key Laboratory of Pesticide Science College of Sciences Nanjing Agricultural University Nanjing 210095 China) E-mail address
| | - Qing Xia
- Jiangsu Key Laboratory of Pesticide Science College of Sciences Nanjing Agricultural University Nanjing 210095 China) E-mail address
| | - Mingzhi Zhang
- Jiangsu Key Laboratory of Pesticide Science College of Sciences Nanjing Agricultural University Nanjing 210095 China) E-mail address
| | - Yu‐Cheng Gu
- Syngenta Jealott's Hill International Research Centre Warfield RG42 6EY United Kingdom (UK
| | - Wei‐Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science College of Sciences Nanjing Agricultural University Nanjing 210095 China) E-mail address
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123
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Xia Q, Li Y, Wang X, Dai P, Deng H, Zhang WH. Visible Light-Driven α-Alkylation of N-Aryl tetrahydroisoquinolines Initiated by Electron Donor-Acceptor Complexes. Org Lett 2020; 22:7290-7294. [PMID: 32902295 DOI: 10.1021/acs.orglett.0c02631] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The visible light-driven α-alkylation of N-aryl tetrahydroisoquinolines was initiated through electron donor-acceptor complex photochemistry. The reaction can proceed smoothly without the addition of any photocatalysts, transition-metal catalysts, or additional oxidants. The proposed mechanism was supported by various mechanistic studies, and the reactive open-shell alkyl radicals were generally produced from an alkylamine and underwent radical coupling for alkylating a wide range of N-aryl tetrahydroisoquinolines.
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Affiliation(s)
- Qing Xia
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yufei Li
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xinmin Wang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Peng Dai
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Hongping Deng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
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Yang B, Niu Q, Yang Y, Dai P, Yuan T, Xu S, Pan X, Yang Y, Zhu G. Self-made Salmonella Pullorum agglutination antigen development and its potential practical application. Poult Sci 2020; 98:6326-6332. [PMID: 31399741 PMCID: PMC8913757 DOI: 10.3382/ps/pez453] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 07/25/2019] [Indexed: 12/12/2022] Open
Abstract
Pullorum disease caused by Salmonella Pullorum is one of the most important infectious diseases in the poultry industry worldwide, which leads to serious economic losses in many developing countries because of its high mortality rate in young chicks. The traditional slide agglutination test with low cost, fast reaction, and on-site detection has been widely used in the diagnosis of Pullorum disease. However, in practice, the test performance is with the disadvantages of false positive results and unstable detection results. In this paper, we developed self-made agglutination antigens prepared by local isolates in the poultry farm and compare the detection performance with commercial agglutination antigens (China Institute of Veterinary Drug Control) and Group D Salmonella ELISA kit (BioChek UK Ltd). The results of detecting 200 serum samples indicated that the consistency of commercial agglutination antigen detecting in 2 times was only 79.5%. Using the ELISA kit as the reference method, the commercial agglutination antigen detecting results of the Kappa test were only moderately consistent (0.58 ∼ 0.59). Meanwhile, positive and total coincidence rates of the self-made agglutination antigen test with more reliable repeat could reach 97.4 and 88%, respectively, and the result of Kappa test was highly consistent (0.75). The Receiver Operating Characteristic curve analysis clarified that the area under the receiver-operating-characteristic curve values of self-made and commercial agglutination antigen tests could reach 0.861 and 0.804, respectively. These results were coincident when detecting known positive serum from the infected chickens. It's worth mentioning that the visible positive reaction of self-made agglutination antigen test appeared faster and stronger than commercial antigen test. In conclusion, self-made Salmonella Pullorum agglutination antigen developed in this study was much better than commercial agglutination antigen and is expected to be a valuable tool in the diagnosis of the epidemiology of Salmonella Pullorum.
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Affiliation(s)
- B Yang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
| | - Q Niu
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
| | - Y Yang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
| | - P Dai
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
| | - T Yuan
- Yuan Feng animal husbandry, Qinzhou, Guangxi Autonomous Region 535400, China
| | - S Xu
- Yuan Feng animal husbandry, Qinzhou, Guangxi Autonomous Region 535400, China
| | - X Pan
- Yuan Feng animal husbandry, Qinzhou, Guangxi Autonomous Region 535400, China
| | - Y Yang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
| | - G Zhu
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
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Dai P, Li Z, Zhang Y, Liu S, Zeng B. PBR-Net: Imitating Physically Based Rendering using Deep Neural Network. IEEE Trans Image Process 2020; 29:5980-5992. [PMID: 32310770 DOI: 10.1109/tip.2020.2987169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Physically based rendering has been widely used to generate photo-realistic images, which greatly impacts industry by providing appealing rendering, such as for entertainment and augmented reality, and academia by serving large scale high-fidelity synthetic training data for data hungry methods like deep learning. However, physically based rendering heavily relies on ray-tracing, which can be computational expensive in complicated environment and hard to parallelize. In this paper, we propose an end-to-end deep learning based approach to generate physically based rendering efficiently. Our system consists of two stacked neural networks, which effectively simulates the physical behavior of the rendering process and produces photo-realistic images. The first network, namely shading network, is designed to predict the optimal shading image from surface normal, depth and illumination; the second network, namely composition network, learns to combine the predicted shading image with the reflectance to generate the final result. Our approach is inspired by intrinsic image decomposition, and thus it is more physically reasonable to have shading as intermediate supervision. Extensive experiments show that our approach is robust to noise thanks to a modified perceptual loss and even outperforms the physically based rendering systems in complex scenes given a reasonable time budget.
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126
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Wang Z, Zhu LM, Zhang X, Dai P, Lv GQ, Feng QB, Wang AT, Ming H. Computer-generated photorealistic hologram using ray-wavefront conversion based on the additive compressive light field approach. Opt Lett 2020; 45:615-618. [PMID: 32004265 DOI: 10.1364/ol.383508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
The conventional computer-generated hologram reconstructing photorealistic three-dimensional (3D) images based on ray-wavefront conversion has the disadvantage of spatio-angular resolution trade-off. In this Letter, we propose for the first time, to the best of our knowledge, a computer-generated photorealistic hologram without spatio-angular resolution trade-off based on the additive compressive light field (CLF) approach. The original light field is compressed into multiple layer images through numerical optimization based on the additive light field principle. Then, by independently calculating the wave propagation from each layer image to the hologram plane and adding them together, a CLF hologram is generated. Since the CLF information is presented through a holographic method, the advantage of high resolution in CLF is preserved while the limitation of the number of physically stacked layers (such as liquid crystal displays) is removed, leading to higher quality, larger depth of field, and higher brightness compared with a conventional CLF display. The proposed method is verified with a photorealistic optical experiment.
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127
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Dai P, Wang X, Liu MF. A dual role of the PIWI/piRNA machinery in regulating mRNAs during mouse spermiogenesis. Sci China Life Sci 2020; 63:447-449. [DOI: 10.1007/s11427-020-1632-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 01/15/2020] [Indexed: 11/24/2022]
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Dai P, Kong X. [Analysis for common chromosomal breakpoint regions among 586 carriers of reciprocal translocations from Henan Province]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2020; 37:37-40. [PMID: 31922593 DOI: 10.3760/cma.j.issn.1003-9406.2020.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To determine the frequency, common chromosomal karyotypes and breakpoints, and involved regions among carriers of reciprocal translocations from Henan Province, and to explore the influence of common breakpoint regions on pregnancy and fetal development. METHODS For 586 carriers of reciprocal translocations, the above features were retrospectively analyzed. RESULTS The 586 reciprocal translocations were identified among 62 477 subjects, which yielded a frequency of 0.94%. Among these, 572 (0.92%) had abnormal fertility, and 14 (0.02%) had a history of abnormal fetal development. Statistical analysis showed that chromosomes 1, 4, 7 and 11 were most frequently involved, with t(11;22)(q25;q13) being the most common type of translocation. In total 437 breakpoint regions were identified, with 11q23, 22q13 and 1p36 being most frequently involved, which resulted in infertility, abortion, embryo death, congenital malformation, development delay, mental retardation or a normal phenotype. CONCLUSION Above results indicated a 0.92% carrier rate for reciprocal chromosomal translocations in Henan. The location of breakpoint regions may affect the pregnancy and/or fetal development. Discovery of such regions may enable more accurate genetic, reproductive and developmental counseling for carriers, and provide reference for delineation of function and pathogenetic mechanism of the relevant genes.
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Affiliation(s)
- Peng Dai
- Genetic and Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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Dong Z, Zhao X, Li Q, Yang Z, Xi Y, Alexeev A, Shen H, Wang O, Ruan J, Ren H, Wei H, Qi X, Li J, Zhu X, Zhang Y, Dai P, Kong X, Kirkconnell K, Alferov O, Giles S, Yamtich J, Kermani BG, Dong C, Liu P, Mi Z, Zhang W, Xu X, Drmanac R, Choy KW, Jiang Y. Development of coupling controlled polymerizations by adapter-ligation in mate-pair sequencing for detection of various genomic variants in one single assay. DNA Res 2020; 26:313-325. [PMID: 31173071 PMCID: PMC6704401 DOI: 10.1093/dnares/dsz011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 12/10/2018] [Accepted: 05/07/2019] [Indexed: 12/17/2022] Open
Abstract
The diversity of disease presentations warrants one single assay for detection and delineation of various genomic disorders. Herein, we describe a gel-free and biotin-capture-free mate-pair method through coupling Controlled Polymerizations by Adapter-Ligation (CP-AL). We first demonstrated the feasibility and ease-of-use in monitoring DNA nick translation and primer extension by limiting the nucleotide input. By coupling these two controlled polymerizations by a reported non-conventional adapter-ligation reaction 3′ branch ligation, we evidenced that CP-AL significantly increased DNA circularization efficiency (by 4-fold) and was applicable for different sequencing methods but at a faction of current cost. Its advantages were further demonstrated by fully elimination of small-insert-contaminated (by 39.3-fold) with a ∼50% increment of physical coverage, and producing uniform genome/exome coverage and the lowest chimeric rate. It achieved single-nucleotide variants detection with sensitivity and specificity up to 97.3 and 99.7%, respectively, compared with data from small-insert libraries. In addition, this method can provide a comprehensive delineation of structural rearrangements, evidenced by a potential diagnosis in a patient with oligo-atheno-terato-spermia. Moreover, it enables accurate mutation identification by integration of genomic variants from different aberration types. Overall, it provides a potential single-integrated solution for detecting various genomic variants, facilitating a genetic diagnosis in human diseases.
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Affiliation(s)
- Zirui Dong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Xia Zhao
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- MGI, BGI-Shenzhen, Shenzhen, China
| | - Qiaoling Li
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- MGI, BGI-Shenzhen, Shenzhen, China
| | - Zhenjun Yang
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Yang Xi
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- MGI, BGI-Shenzhen, Shenzhen, China
| | | | - Hanjie Shen
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- MGI, BGI-Shenzhen, Shenzhen, China
| | - Ou Wang
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Jie Ruan
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Han Ren
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | | | - Xiaojuan Qi
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Jiguang Li
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- MGI, BGI-Shenzhen, Shenzhen, China
| | - Xiaofan Zhu
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | | | - Peng Dai
- Genetics and Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiangdong Kong
- Genetics and Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | | | | | | | | | | | - Chao Dong
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Pengjuan Liu
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- MGI, BGI-Shenzhen, Shenzhen, China
| | - Zilan Mi
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
| | - Wenwei Zhang
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- Guangdong High-Throughput Sequencing Research Center, Shenzhen, China
| | - Xun Xu
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- James D. Watson Institute of Genome Sciences, Hangzhou, China
| | - Radoje Drmanac
- BGI-Shenzhen, Shenzhen, China
- China National GeneBank, BGI-Shenzhen, Shenzhen, China
- MGI, BGI-Shenzhen, Shenzhen, China
- Complete Genomics Inc., San Jose, CA, USA
- To whom correspondence should be addressed. Tel. +1 4086482560 3079. Fax. +1 4086482549. (Y.J.); Tel. +852 35053099. Fax. +852 26360008. (K.W.C.); Tel. +1 4088389539. Fax. +1 4086482549. (R.D.)
| | - Kwong Wai Choy
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
- The Chinese University of Hong Kong—Baylor College of Medicine Joint Center for Medical Genetics, Hong Kong, China
- To whom correspondence should be addressed. Tel. +1 4086482560 3079. Fax. +1 4086482549. (Y.J.); Tel. +852 35053099. Fax. +852 26360008. (K.W.C.); Tel. +1 4088389539. Fax. +1 4086482549. (R.D.)
| | - Yuan Jiang
- Complete Genomics Inc., San Jose, CA, USA
- To whom correspondence should be addressed. Tel. +1 4086482560 3079. Fax. +1 4086482549. (Y.J.); Tel. +852 35053099. Fax. +852 26360008. (K.W.C.); Tel. +1 4088389539. Fax. +1 4086482549. (R.D.)
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Abstract
On a self-designed automatic diameter control system, large diameter (6 inch) LiNbO3 crystals without cracks are successfully grown by choosing a suitable temperature gradient, starting composition, and growth parameters with the Czochralski method.
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Affiliation(s)
- Shuai Wang
- State Key Laboratory of Material-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Cheng Ji
- Jiangnan Graphene Research Institute
- Changzhou
- P. R. China
| | - Peng Dai
- Jiangnan Graphene Research Institute
- Changzhou
- P. R. China
| | - Liming Shen
- State Key Laboratory of Material-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
| | - Ningzhong Bao
- State Key Laboratory of Material-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing
- P. R. China
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131
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Huang M, Jiang LJ, Dai P, Ronsheim M, Or YS. P44 - Tissue distribution of EDP-305, a highly selective and potent farnesoid X receptor (FXR) agonist, in preclinical species. Drug Metab Pharmacokinet 2020. [DOI: 10.1016/j.dmpk.2020.04.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhao G, Dai P, Gao S, Zhao X, Wang C, Liu L, Kong X. A case of prenatal diagnosis of 18p deletion syndrome following noninvasive prenatal testing. Mol Cytogenet 2019; 12:53. [PMID: 31890033 PMCID: PMC6925888 DOI: 10.1186/s13039-019-0464-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 12/06/2019] [Indexed: 12/21/2022] Open
Abstract
Background Chromosome 18p deletion syndrome is a disease caused by the complete or partial deletion of the short arm of chromosome 18, there were few cases reported about the prenatal diagnosis of 18p deletion syndrome. Noninvasive prenatal testing (NIPT) is widely used in the screening of common fetal chromosome aneuploidy. However, the segmental deletions and duplications should also be concerned. Except that some cases had increased nuchal translucency or holoprosencephaly, most of the fetal phenotype of 18p deletion syndrome may not be evident during the pregnancy, 18p deletion syndrome was always accidentally discovered during the prenatal examination. Case presentations In our case, we found a pure partial monosomy 18p deletion during the confirmation of the result of NIPT by copy number variation sequencing (CNV-Seq). The result of NIPT suggested that there was a partial or complete deletion of X chromosome. The amniotic fluid karyotype was normal, but result of CNV-Seq indicated a 7.56 Mb deletion on the short arm of chromosome 18 but not in the couple, which means the deletion was de novo deletion. Finally, the parents chose to terminate the pregnancy. Conclusions To our knowledge, this is the first case of prenatal diagnosis of 18p deletion syndrome following NIPT.NIPT combined with ultrasound may be a relatively efficient method to screen chromosome microdeletions especially for the 18p deletion syndrome.
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Affiliation(s)
- Ganye Zhao
- Genetics and Prenatal Diagnosis Center, The First Affiliated Hospital of Zhengzhou University, Henan Engineering Research Center for Gene Editing of Human Genetic Disease, Erqi District, Zhengzhou, China
| | - Peng Dai
- Genetics and Prenatal Diagnosis Center, The First Affiliated Hospital of Zhengzhou University, Henan Engineering Research Center for Gene Editing of Human Genetic Disease, Erqi District, Zhengzhou, China
| | - Shanshan Gao
- Genetics and Prenatal Diagnosis Center, The First Affiliated Hospital of Zhengzhou University, Henan Engineering Research Center for Gene Editing of Human Genetic Disease, Erqi District, Zhengzhou, China
| | - Xuechao Zhao
- Genetics and Prenatal Diagnosis Center, The First Affiliated Hospital of Zhengzhou University, Henan Engineering Research Center for Gene Editing of Human Genetic Disease, Erqi District, Zhengzhou, China
| | - Conghui Wang
- Genetics and Prenatal Diagnosis Center, The First Affiliated Hospital of Zhengzhou University, Henan Engineering Research Center for Gene Editing of Human Genetic Disease, Erqi District, Zhengzhou, China
| | - Lina Liu
- Genetics and Prenatal Diagnosis Center, The First Affiliated Hospital of Zhengzhou University, Henan Engineering Research Center for Gene Editing of Human Genetic Disease, Erqi District, Zhengzhou, China
| | - Xiangdong Kong
- Genetics and Prenatal Diagnosis Center, The First Affiliated Hospital of Zhengzhou University, Henan Engineering Research Center for Gene Editing of Human Genetic Disease, Erqi District, Zhengzhou, China
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133
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Dai P, Wang X, Gou LT, Li ZT, Wen Z, Chen ZG, Hua MM, Zhong A, Wang L, Su H, Wan H, Qian K, Liao L, Li J, Tian B, Li D, Fu XD, Shi HJ, Zhou Y, Liu MF. A Translation-Activating Function of MIWI/piRNA during Mouse Spermiogenesis. Cell 2019; 179:1566-1581.e16. [PMID: 31835033 PMCID: PMC8139323 DOI: 10.1016/j.cell.2019.11.022] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 08/01/2019] [Accepted: 11/14/2019] [Indexed: 01/05/2023]
Abstract
Spermiogenesis is a highly orchestrated developmental process during which chromatin condensation decouples transcription from translation. Spermiogenic mRNAs are transcribed earlier and stored in a translationally inert state until needed for translation; however, it remains largely unclear how such repressed mRNAs become activated during spermiogenesis. We previously reported that the MIWI/piRNA machinery is responsible for mRNA elimination during late spermiogenesis in preparation for spermatozoa production. Here we unexpectedly discover that the same machinery is also responsible for activating translation of a subset of spermiogenic mRNAs to coordinate with morphological transformation into spermatozoa. Such action requires specific base-pairing interactions of piRNAs with target mRNAs in their 3' UTRs, which activates translation through coupling with cis-acting AU-rich elements to nucleate the formation of a MIWI/piRNA/eIF3f/HuR super-complex in a developmental stage-specific manner. These findings reveal a critical role of the piRNA system in translation activation, which we show is functionally required for spermatid development.
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Affiliation(s)
- Peng Dai
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Xin Wang
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Lan-Tao Gou
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0651, USA
| | - Zhi-Tong Li
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Ze Wen
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Zong-Gui Chen
- College of Life Sciences, Institute of Advanced Studies, Wuhan University, Wuhan, Hubei 430072, China
| | - Min-Min Hua
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China; NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Pharmacy School, Fudan University, Shanghai, 200032, China
| | - Ai Zhong
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Lingbo Wang
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Pharmacy School, Fudan University, Shanghai, 200032, China; State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Haiyang Su
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Huida Wan
- Shanghai Key Laboratory of Regulatory Biology and Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Kun Qian
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Lujian Liao
- Shanghai Key Laboratory of Regulatory Biology and Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Jinsong Li
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China; School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China
| | - Bin Tian
- Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers New Jersey Medical School, Newark, New Jersey 07103, USA
| | - Dangsheng Li
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiang-Dong Fu
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0651, USA
| | - Hui-Juan Shi
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Pharmacy School, Fudan University, Shanghai, 200032, China.
| | - Yu Zhou
- College of Life Sciences, Institute of Advanced Studies, Wuhan University, Wuhan, Hubei 430072, China.
| | - Mo-Fang Liu
- State Key Laboratory of Molecular Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences-University of Chinese Academy of Sciences, Shanghai 200031, China; School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China.
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Wang Z, Dai P, Yang X, Ruan CC, Biondi A, Desneux N, Zang LS. Selectivity of novel and traditional insecticides used for management of whiteflies on the parasitoid Encarsia formosa. Pest Manag Sci 2019; 75:2716-2724. [PMID: 30784200 DOI: 10.1002/ps.5380] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/29/2019] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Encarsia formosa Gahan is the most important parasitoid exploited for the control of whitefly pests of vegetable crops. However, the non-target effects of recently developed insecticides for controlling whiteflies toward this biocontrol agent is little documented. Here we evaluated the susceptibility of E. formosa adults and juveniles to eight commonly used insecticides against whiteflies. RESULTS Residual toxicity tests on glass showed that E. formosa adults were susceptible (over 98% mortality after 6 h treated) to field concentrations of the tested neonicotinoids (imidacloprid, acetamiprid, nitenpyram and thiamethoxam), abamectin, cyantraniliprole, and sulfoxaflor at their field concentrations. Pyriproxyfen was harmless to both adult and pupae of E. formosa. A risk quotient analysis showed that toxicity of pyriproxyfen to E. formosa adults was the lowest, followed by acetamiprid and cyantraniliprole. In the leaf residues test, mortality of E. formosa adults under all insecticides decreased when the residue age increased. Interestingly, E. formosa experiencing contact with the residues of most insecticides, except pyriproxyfen and abamectin, parasitized significantly more hosts 5-days after treatment, suggesting a hormetic effect on parasitism. CONCLUSION The risk assessment of insecticides indicated that pyriproxyfen and cyantraniliprole were the least toxic to E. formosa. Our results suggest that the inclusion of the insecticides in sustainable integrated pest management programs of whiteflies should be carefully evaluated on a case-by-case basis. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Zhuo Wang
- Engineering Research Center of Natural Enemies, Institute of Biological Control, Jilin Agricultural University, Changchun, China
| | - Peng Dai
- Engineering Research Center of Natural Enemies, Institute of Biological Control, Jilin Agricultural University, Changchun, China
| | | | - Chang-Chun Ruan
- Engineering Research Center of Natural Enemies, Institute of Biological Control, Jilin Agricultural University, Changchun, China
| | - Antonio Biondi
- Department of Agriculture, Food and Environment, University of Catania, Catania, Italy
| | - Nicolas Desneux
- INRA (French National Institute for Agricultural Research), Université Côte d'Azur, CNRS, UMR 1355-7254, Institut Sophia Agrobiotech, Sophia-Antipolis, France
| | - Lian-Sheng Zang
- Engineering Research Center of Natural Enemies, Institute of Biological Control, Jilin Agricultural University, Changchun, China
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Abstract
Summary PTPN11 gene encodes tyrosine phosphatase SHP-2 which locates on chromosome 12(12q24.1), expresses in most embryonic and adult tissues, and plays pivotal roles in cell proliferation, differentiation, survival and cell death. SHP-2 apparently participates in signaling events downstream of RAS-MAPK and JAK/STAT. Diseases related to PTPN11 gene mutations include the Noonan syndrome(NS) and the NS with Multiple Lentigines(NSML). Both NS and NSML contain the phenotypes of deafness, craniofacial anomalies, short stature, congenital heart defects, skin disorders, ophthalmologic abnormalities and cancer predisposition.
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136
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Wang S, Dai P, Yan Z, Wang Y, Shao J, Wu Y, Deng C, Zhang W. Metal‐free, Visible‐Light‐Induced Radical Trifluoromethylation/Cyclization of N‐benzamides with CF
3
SO
2
Na to Synthesize CF
3
‐Containing Isoquinoline‐1,3‐diones. ChemistrySelect 2019. [DOI: 10.1002/slct.201902545] [Citation(s) in RCA: 11] [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: 11/08/2022]
Affiliation(s)
- Shaowei Wang
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
| | - Peng Dai
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
| | - Zhichao Yan
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
| | - Youjia Wang
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
| | - Jiaxuan Shao
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
| | - Yanhui Wu
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
| | - Weihua Zhang
- Jiangsu Key Laboratory of Pesticide Science and Department of ChemistryCollege of SciencesNanjing Agricultural University Nanjing 210095 P. R. China
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Huang SS, Huang BQ, Gao X, Yuan YY, Su Y, Wang GJ, Kang DY, Dai P. [Case report and diagnosis of Noonan syndrome with multiple lentigines with deafness as its main clinical feature]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:804-807. [PMID: 31446693 DOI: 10.13201/j.issn.1001-1781.2019.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Indexed: 06/10/2023]
Abstract
Summary Noonan syndrome with multiple lentigines(NSML) is a disorder with syndromic hearing loss. Abnormalities of other systems in NSML have received increasing attention, but hearing loss is rarely concerned. And due to the incomplete phenotype, some patients with NSML maybe missed or maybe confused with other syndromic deafness such as Waardenburg syndrome. Our study will familiarize more otolaryngologists with Leopard syndrome. A 5-year-old boy with bilateral sensorineural hearing loss and numerous symmetrically distributed dark brown macules that had good effect of cochlear implantation was collected in this study. And his father had bilateral sensorineural hearing loss and numerous symmetrically distributed dark brown macules. Waardenburg syndrome was initially diagnosed by clinical phenotype and its molecular etiology was confirmed by gene diagnosis. Waardenburg syndrome-related deafness genes and 131 known deafness genes were not identified by second-generation sequencing. Whole-exon sequencing was performed for 4 individuals in the family and the results were confirmed by Sanger sequencing. This study confirmed the diagnosis by identifying a disease-causing mutation in the PTPN11 gene, which was a heterozygous missense mutation at p. Tyr279Cys(c. 836A>G). The mutation co-segregated with hearing loss in the family. Our results demonstrated that hearing loss in this family was caused by heterozygous mutations in PTPN11. These cases will familiarize more otolaryngologists with NSML, and they emphasize the importance of considering NSML as a possible cause of hearing problems.
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Zheng S, Guo S, Sun G, Shi Y, Wei Z, Tang Y, He F, Shi C, Dai P, Chong H, Samuelson I, Zen K, Zhang CY, Zhang Y, Li J, Jiang X. Gain of Metabolic Benefit with Ablation of miR-149-3p from Subcutaneous Adipose Tissue in Diet-Induced Obese Mice. Mol Ther Nucleic Acids 2019; 18:194-203. [PMID: 31561124 PMCID: PMC6796689 DOI: 10.1016/j.omtn.2019.07.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 07/17/2019] [Accepted: 07/24/2019] [Indexed: 12/31/2022]
Abstract
The global rise in obesity has become a public health crisis. During the onset of obesity, disrupted catecholamine signals have been described to contribute to excess fat accumulation, however, the molecular and metabolic change of subcutaneous adipose tissue (SAT) upon chronic high-fat feeding has rarely been investigated. Here, we show that chronic high-fat feeding caused a significant decrease in the expression of thermogenic genes and acquisition of partial deleterious features of visceral fat in SAT. Upregulated miR-149-3p was involved in this obesity-induced "visceralization" of SAT via inhibiting PRDM16, a master regulator that promoted SAT thermogenesis. Reduction of miR-149-3p significantly increased PRDM16 expression in SAT, with improved whole-body insulin sensitivity, decreased SAT inflammation, and liver steatosis in high-fat fed mice. These findings provided direct evidence of the anti-obese and anti-diabetic effect of PRDM16 in the obese background for the first time and identified that miR-149-3p could serve as a therapeutic target to protect against diet-induced obesity and metabolic dysfunctions.
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Affiliation(s)
- Shasha Zheng
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Shanjun Guo
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Gongrui Sun
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Yanteng Shi
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Zhe Wei
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Yuhang Tang
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Fangfang He
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Chenke Shi
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Peng Dai
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Hoshun Chong
- Department of Thoracic and Cardiovascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Isabella Samuelson
- University of Cambridge Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK
| | - Ke Zen
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Chen-Yu Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Yujing Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China.
| | - Jing Li
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China.
| | - Xiaohong Jiang
- State Key Laboratory of Pharmaceutical Biotechnology, NJU Advanced Institute for Life Sciences (NAILS), School of Life Sciences, Nanjing University, Nanjing, Jiangsu 210093, China.
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139
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Dai P, Li J, Li W, Qin X, Wu X, Di W, Zhang Y. Genetic polymorphisms and pancreatic cancer risk: A PRISMA-compliant systematic review and meta-analysis. Medicine (Baltimore) 2019; 98:e16541. [PMID: 31393355 PMCID: PMC6708677 DOI: 10.1097/md.0000000000016541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/10/2019] [Accepted: 06/27/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUNDS Previous investigations yielded inconsistent results for the associations between pancreatic cancer (PC) risk and genetic polymorphisms. The study aimed to perform a systematic review and meta-analysis of studies exploring association of some genetic polymorphisms and PC risk. METHODS We systematically searched on PubMed and Web of Science for association of genetic polymorphisms and PC risk published from 1969 to January 2019. We computed the multivariate odd ratio (OR) and 95% confidence intervals (CI), comparing different genetic types. RESULTS The present meta-analysis showed significant associations between deoxyribonucleic acid (DNA) repair gene (X-ray repair cross-complementing group 1 (XRCC1) Arg399GIn and Arg194Trp, excision repair cross complementation 1 (ERCC1) rs11615 and rs3212986, ERCC2 rs13181) polymorphisms and PC risk. CONCLUSIONS Because of the limited sample size and ethnicity enrolled in the present meta-analysis, further larger scaled studies should be performed to demonstrate the association.
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Affiliation(s)
- Peng Dai
- Department of Hepato-Biliary-Pancreatic Surgery, Shanxi Provincial People's Hospital Affiliated to Shanxi Medical University
| | - Jing Li
- Department of Microbiology and Immunology, School of Basic Medical Sciences, Shanxi Medical University
| | - Weibin Li
- Department of General Surgery, Shanxi Academy of Medical Sciences, Shanxi Dayi Hospital, Taiyuan, Shanxi, China
| | - Xueliang Qin
- Department of Hepato-Biliary-Pancreatic Surgery, Shanxi Provincial People's Hospital Affiliated to Shanxi Medical University
| | - Xiaoyong Wu
- Department of Hepato-Biliary-Pancreatic Surgery, Shanxi Provincial People's Hospital Affiliated to Shanxi Medical University
| | - Weidong Di
- Department of Hepato-Biliary-Pancreatic Surgery, Shanxi Provincial People's Hospital Affiliated to Shanxi Medical University
| | - Yanzhong Zhang
- Department of Hepato-Biliary-Pancreatic Surgery, Shanxi Provincial People's Hospital Affiliated to Shanxi Medical University
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140
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Bi K, Liu H, Chen Y, Luo F, Shu Z, Lin J, Liu S, Liu H, Zeng Z, Dai P, Zhu M, Duan H. Short channel monolayer MoS 2 field-effect transistors defined by SiO x nanofins down to 20 nm. Nanotechnology 2019; 30:295301. [PMID: 30917350 DOI: 10.1088/1361-6528/ab13cc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Layered semiconductors such as transition metal dichalcogenides (TMDs) with proper bandgaps complement the zero-bandgap drawback of graphene, demonstrating great potential for post-silicon complementary metal-oxide-semiconductor technology. Among the TMD family, molybdenum disulfide (MoS2) is highly attractive for its atomically thin body, large bandgap and decent mechanical and chemical stability. However, current nanofabrication techniques hardly satisfy the requirements of short channel and convenient preparation simultaneously. Here, we demonstrate a simple and effective approach to fabricate short channel chemical vapor deposition (CVD) monolayer MoS2 field-effect transistors (FET) with channel length down to 20 nm. Electron-beam lithography based on high-resolution negative-tone hydrogen silsesquioxane electron resists were applied to create 20 nm wide SiO x lines, defining the short channel length. The 20 nm MoS2 FET displays ON-sate current in excess of 100 μA μm-1. The corresponding current ON/OFF ratio at room temperature reaches 105. We carefully studied the short channel effect of as-fabricated MoS2 FETs. Combining with the large-scale growth of CVD method, our results will pave a way for short channel device applications based on atomically thin two-dimensional semiconductors.
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Affiliation(s)
- Kaixi Bi
- School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, People's Republic of China
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141
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Zhang W, Wang X, You W, Chen J, Dai P, Zhang P. RESLS: Region and Edge Synergetic Level Set Framework for Image Segmentation. IEEE Trans Image Process 2019; 29:57-71. [PMID: 31331891 DOI: 10.1109/tip.2019.2928134] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The active contour models with level set evolution have been visited with a vast number of methods for image segmentation. They can be mainly classified into region-based and edge-based models, and it has been validated that the hybrid variants combining both region and edge information can improve the segmentation performance. However, to the best of our knowledge, the theoretical foundation of collaboration mechanism between the region and the edge information is limited. Specifically, most existing hybrid models are just combining all the energy terms together, resulting in great challenges of choosing an appropriate weight coefficient for each term and accommodating different modalities of imaging. To overcome these difficulties, this paper proposes a region and edge synergetic level set framework named RESLS. It provides an approach to construct new hybrid level set models using a normalized intensity indicator function that allows the region information easily embedding into the edge-based model. In this case, the energy weights of region and edge terms can be constrained by the global optimization condition deduced from the framework. Some representative as well as state-of-the-art models are taken as examples to demonstrate the generality of our method. The experiments validate that under the guidance of the optimization condition, the weighting parameter of each term can be reliably chosen. Meanwhile, the segmentation accuracy, robustness, and computational efficiency of RESLS can be improved compared with its component models.
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142
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Dai P, Tan X, Luo Q, Yu X, Zhang S, Liu F, Zhang WH. Synthesis of 3-Acyl-isoxazoles and Δ 2-Isoxazolines from Methyl Ketones, Alkynes or Alkenes, and tert-Butyl Nitrite via a Csp 3-H Radical Functionalization/Cycloaddition Cascade. Org Lett 2019; 21:5096-5100. [PMID: 31194561 DOI: 10.1021/acs.orglett.9b01683] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A novel metal-free tandem Csp3-H bond functionalization of ketones and 1,3-dipolar cycloaddition has been developed. An efficient approach to a variety of oxazole and isoxazoline derivatives is demonstrated using the 1,3-dipolar cycloaddition of alkynes and alkenes to nitrile oxides generated by reactions of methyl ketones with tert-butyl nitrite. This new protocol provides access to a variety of isoxazolines with diverse functionalities. An isoxazole generated in this way was found to have significant antifungal activity.
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Affiliation(s)
- Peng Dai
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Xin Tan
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Qian Luo
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Xiang Yu
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Shuguang Zhang
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Fang Liu
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
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143
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Wang B, Dai P, Ding D, Del Rosario A, Grant RA, Pentelute BL, Laub MT. Author Correction: Affinity-based capture and identification of protein effectors of the growth regulator ppGpp. Nat Chem Biol 2019; 15:756. [PMID: 31076737 DOI: 10.1038/s41589-019-0296-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In the version of the article originally published, two sets of labels on the x axis of the graph in Fig. 5b were in reverse order. In the 'PurF' row, the locations of 'N48A' and 'R45A' should be switched, and in the row below those of '4.1' and the minus sign should be switched. Shown below are the original and corrected versions of Fig. 5b. The error has been corrected in the HTML and PDF versions of the article.
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Affiliation(s)
- Boyuan Wang
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Peng Dai
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - David Ding
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Amanda Del Rosario
- Koch Institute for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Robert A Grant
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Bradley L Pentelute
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA.,Koch Institute for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.,Center for Environmental Health Sciences MIT, Massachusetts Institute of Technology, Cambridge, MA, USA.,Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Michael T Laub
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA. .,Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA, USA.
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144
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Sai N, Han WJ, Wang MM, Qin X, Zhang T, Shen WD, Liu J, Dai P, Yang SM, Han DY. [Clinical diagnosis and surgical management of 110 cases of facial nerve schwannomas]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 54:101-109. [PMID: 30776861 DOI: 10.3760/cma.j.issn.1673-0860.2019.02.002] [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] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To elucidate the clinical behavior, causes of misdiagnosis, surgical management, and outcomes of facial nerve schwannomas (FNS). Methods: A retrospective review in Chinese People's Liberation Army General Hospital from January 1, 2002 to December 31, 2015 was carried out and evaluated 110 patients with FNS, including 50 males and 60 females, aged 16-67 years old. The appropriate surgical strategy was selected based on each patient's clinical manifestations, facial nerve function, and imaging characteristics. After surgery, patients received follow-up visits to assess their facial nerve functions, with the effect of treatment compared to the reality before surgery. The Kruskal-Wallis H test was used to distinguish between the pre- and post-operation facial nerve functions in patients who had different facial nerve functions before the operations. Results: 110 cases of FNS mainly presented with facial paralysis, hearing loss, tinnitus, otalgia, dizziness, and facial spasm. 20 of the cases were misdiagnosed as Bell's Palsy, 6 were mistaken for chronic otitis media/cholesteatoma with radical mastoidectomy, 3 were mistaken for Meniere's disease, 1 was misdiagnosed as petrous bone cholesteatoma, and 4 were mistaken for acoustic neuroma. 81.8 % (90/110) of the patients had multiple segments of the facial nerve, including the vertical segment of the facial nerve, accounting for 65.5% (72/110), followed by the labyrinthine/geniculate segment, for 61.8% (68/110), and the horizontal segment, for 55.5% (61/110). The appropriate surgical approaches were chosed based on the sizes and scopes of the tumors evaluated by imaging: transmastoid approach in 73 cases, translabyrinthe approach in 14 cases, middle cranial fossa approach in 13 cases, retrosigmoid approach in 3 cases, transmastoid-middle cranial fossa approach in 3 cases, and transmastoid-neck approach in 4 cases, with all the patients undergoing a total/subtotal resection of the tumor. Eighty-seven patients had their facial nerves reconstructed. Among them, 6 received facial nerve end-to-end anastomosis, 55 received great auricular nerve graft, and 26 were subjected to facial nerve-hypoglossal nerve anastomosis. Because of long histories, facial muscle atrophies, or other reasons, the remaining patients were not received facial nerve reconstruction. The House-Brackmann(H-B) grading scale was used to evaluate the facial nerve function pre- and post-operation. Patients with better facial nerve functions and shorter history of facial paralysis before operation would get relatively better facial nerve function. The before and after operation comparisons revealed that the recovery of the facial nerve functions in patients with H-B Ⅰ-Ⅲ was better than the improvement in patients with H-B Ⅳ-Ⅴ. The difference was statistically significant (Kruskal-Wallis H test, H=8.508, P<0.05). Conclusions: The diagnosis of patients with unknown facial paralysis, hearing loss, and tinnitus should take into account the possibility of FNS. CT and other imaging examinations of the temporal bone can avoid misdiagnosis and determine the tumor size and extent of lesions, as well as provide the basis for the choice of the surgical approach. After tumors have been completely resected, facial nerve reconstruction can be performed simultaneously, according to the defect of the nerve.
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Affiliation(s)
- N Sai
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - W J Han
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - M M Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China; Department of Rheumatism and Immunology, Tianjin Fist Central Hospital, Tianjin 300192, China
| | - X Qin
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China; Nankai University, Tianjin 300071, China
| | - T Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - W D Shen
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - J Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - P Dai
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - S M Yang
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - D Y Han
- Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, China
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145
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Zhao D, Sun X, Lv S, Sun M, Guo H, Zhai Y, Wang Z, Dai P, Zheng L, Ye M, Wang X. Salidroside attenuates oxidized low‑density lipoprotein‑induced endothelial cell injury via promotion of the AMPK/SIRT1 pathway. Int J Mol Med 2019; 43:2279-2290. [PMID: 30942428 PMCID: PMC6488166 DOI: 10.3892/ijmm.2019.4153] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 08/29/2018] [Accepted: 03/12/2019] [Indexed: 02/07/2023] Open
Abstract
Oxidized low-density lipoprotein (ox-LDL)-induced endothelial damage contributes to the initiation and pathogenesis of atherosclerosis. Salidroside can alleviate atherosclerosis and attenuate endothelial cell injury induced by ox-LDL. However, the mechanisms involved in this process are not fully understood. Therefore, the purpose of the present study was to investigate the role of the adenosine monophosphate-activated protein kinase (AMPK)/sirtuin (SIRT)1 pathway in the protection of salidroside against ox-LDL-induced human umbilical vein endothelial cells (HUVECs) injuries. The results revealed that salidroside reverses ox-LDL-induced HUVECs injury as demonstrated by the upregulation of cell viability and downregulation of LDH release. In addition, salidroside increased the expression of the SIRT1 protein in ox-LDL-treated HUVECs. Next, it was demonstrated that SIRT1 knockdown induced by transfection with small interfering (si)RNA targeting SIRT1 (siSRT1) abolished the protection of salidroside against ox-LDL-induced HUVECs injuries. This was illustrated by a decrease in cell viability and an increase in LDH release, caspase-3 activity and apoptosis rate. Furthermore, salidroside mitigated ox-LDL-induced reactive oxygen species production, upregulated malondialdehyde content and NADPH oxidase 2 expression and decreased superoxide dismutase and glutathione peroxidase activities, while these effects were also reversed by siSIRT1 transfection. In addition, it was demonstrated that salidroside suppressed ox-LDL-induced mitochondrial dysfunction as demonstrated by the increase in mitochondrial membrane potential and decreases in cytochrome c expression, and Bax/Bcl-2 reductions. However, these effects were eliminated by SIRT1 knockdown. Finally, it was demonstrated that salidroside significantly upregulated the phosphorylated-AMPK expression in ox-LDL-treated HUVECs and AMPK knockdown induced by transfection with AMPK siRNA (siAMPK) leads to elimination of the salidroside-induced increase in cell viability and the decrease in LDH release. Notably, siAMPK transfection further decreased the expression of SIRT1. In conclusion, these results suggested that salidroside protects HUVECs against ox-LDL injury through inhibiting oxidative stress and improving mitochondrial dysfunction, which were dependent on activating the AMPK/SIRT1 pathway.
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Affiliation(s)
- Dongming Zhao
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Xinyi Sun
- Department of Endocrinology and Metabolism, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Shujie Lv
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Miying Sun
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Huatao Guo
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Yujia Zhai
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Zhi Wang
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Peng Dai
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Lina Zheng
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Mingzhe Ye
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
| | - Xinpeng Wang
- Department of Cardiovascular, Affiliated Hospital of Beihua University, Jilin, Jilin 132011, P.R. China
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146
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Dai P, Gao S, Hou Y, Kong X. [Analysis of cytogenetic characteristics and fertility of carriers of complex chromosomal rearrangements from Henan region]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2019; 36:161-164. [PMID: 30703238 DOI: 10.3760/cma.j.issn.1003-9406.2019.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To explore cytogenetic characteristics and fertility of carriers of complex chromosome rearrangements (CCR) from Henan region. METHODS G-banded karyotyping analysis was carried out on peripheral blood lymphocytes derived from 160 601 patients with reproductive abnormalities. Relevant literature was retrieved from domestic and overseas databases. Cytogenetic characteristics and clinical data of CCR carriers were analyzed. RESULTS Twenty-seven CCR carriers were identified among the 160 601 patients. In addition, 6 cases were identified from the database research. Among the 33 CCR carriers, there were 17 three- and four-way exchange cases (51.5%), 10 double two-way exchange cases (30.3%), and 6 unusual CCRs (18.2%). Infertility was noted in 14 (42.4%) of the CCR carries. A total of 38 pregnancies were achieved in the remaining 19 cases (57.6%), among which spontaneous abortions or embryonic losses have occurred in 89.5% (34/38), multiple congenital abnormalities have occurred in 7.9% (3/38), while phenotypically normal offspring have occurred in 2.6% (1/38). Chromosomes 1, 11, 2, 4, 5 and 12 were more frequently involved, with their breakpoints occurred more than 3 times at 1p22, 11q23, 12p13 and 22q11. CONCLUSION CCR carriers are at a higher risk for abnormal pregnancies. Even for those with normal pregnancy, prenatal diagnosis should be provided. Chromosomes and their breakpoints involved in CCR may affect the fertility of CCR carriers. Analyzing the types of CCR and involved chromosomes and breakpoints can facilitate genetic counseling for CCR carriers.
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Affiliation(s)
- Peng Dai
- Genetic and Prenatal Diagnosis Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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147
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Wang B, Dai P, Ding D, Del Rosario A, Grant RA, Pentelute BL, Laub MT. Affinity-based capture and identification of protein effectors of the growth regulator ppGpp. Nat Chem Biol 2018; 15:141-150. [PMID: 30559427 PMCID: PMC6366861 DOI: 10.1038/s41589-018-0183-4] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Accepted: 10/29/2018] [Indexed: 01/29/2023]
Abstract
The nucleotide ppGpp is a highly conserved regulatory molecule in prokaryotes that helps tune growth rate to nutrient availability. Despite decades of study, how ppGpp regulates growth remains poorly understood. Here, we develop and validate a capture-compound mass spectrometry approach that identifies >50 putative ppGpp targets in Escherichia coli. These targets control many key cellular processes and include 13 enzymes required for nucleotide synthesis. We demonstrate that ppGpp inhibits the de novo synthesis of all purine nucleotides by directly targeting the enzyme PurF. By solving a structure of PurF bound to ppGpp, we design a mutation that ablates ppGpp-based regulation, leading to a dysregulation of purine nucleotide synthesis following ppGpp accumulation. Collectively, our results provide new insights into ppGpp-based growth control and a nearly comprehensive set of targets for future exploration. The capture compounds developed will also now enable the rapid identification of ppGpp targets in any species, including pathogens.
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Affiliation(s)
- Boyuan Wang
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Peng Dai
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - David Ding
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Amanda Del Rosario
- Koch Institute for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Robert A Grant
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Bradley L Pentelute
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA.,Koch Institute for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.,Center for Environmental Health Sciences MIT, Massachusetts Institute of Technology, Cambridge, MA, USA.,Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Michael T Laub
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA. .,Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA, USA.
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148
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Dai P, Yu X, Teng P, Zhang WH, Deng C. Visible-Light- and Oxygen-Promoted Direct Csp2-H Radical Difluoromethylation of Coumarins and Antifungal Activities. Org Lett 2018; 20:6901-6905. [DOI: 10.1021/acs.orglett.8b02965] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Peng Dai
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiang Yu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Peng Teng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
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Liu F, Shi H, Zhu X, Dai P, Lin Z, Long Y, Xie Z, Zhou Y, Duan H. Tunable reflective color filters based on asymmetric Fabry-Perot cavities employing ultrathin Ge 2Sb 2Te 5 as a broadband absorber. Appl Opt 2018; 57:9040-9045. [PMID: 30461892 DOI: 10.1364/ao.57.009040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 09/24/2018] [Indexed: 06/09/2023]
Abstract
We demonstrated a tunable structural color filter based on an asymmetric Fabry-Perot cavity employing germanium antimony tellurium alloy Ge2Sb2Te5 (GST) as a switchable ultrathin lossy layer. The color tunability and switch mechanism of our designed structure were investigated by both simulation and analytical approaches. Both numerical simulations and analytical results show that the tunable reflective colors can be generated through the reversible phase transition of GST from amorphous to crystalline. Additionally, the generated colors possess high brightness, high saturation, and a wide gamut. Our designed structure will inspire phase-transition-based systems' potential applications in colorimetric sensing, smart windows, full-color printing and displays, anti-counterfeiting, and data encryption.
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Yu X, Dai P, Zhu Y, Teng P, Zhang W, Deng C. Metal‐free, Visible‐Light‐Mediated Direct Csp
2
−H Radical Mono‐ and Bis‐trifluoromethylation of Coumarins and Bioactivity Evaluation. ChemCatChem 2018. [DOI: 10.1002/cctc.201801332] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiang Yu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Peng Dai
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Yu‐Chuan Zhu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Peng Teng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Wei‐Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 P. R. China
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