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  1. Article ; Online: Coronary artery-bronchial artery fistula imaging characteristics and its correlation with pulmonary disease severity.

    Chen, Yonghua / Lin, Liaoyi / Deng, Qingshan / Li, Na / Wang, Zhenzhang / Liu, Jinjin / Sun, Houzhang

    Heart and vessels

    2022  Volume 37, Issue 12, Page(s) 2101–2106

    Abstract: Hemoptysis is a common clinical emergency, bronchial arterial embolization is considered to be an effective treatment. The presence of coronary artery-bronchial artery fistula (CBF) may lead to recurrence of hemoptysis after treatment. It is necessary to ...

    Abstract Hemoptysis is a common clinical emergency, bronchial arterial embolization is considered to be an effective treatment. The presence of coronary artery-bronchial artery fistula (CBF) may lead to recurrence of hemoptysis after treatment. It is necessary to investigate the imaging characteristics of a CBF and its correlation with the severity of pulmonary disease. With the development of multi-detector computed tomography, our study used the 320-slice CT bronchial artery angiography technology to observe and visualize blood vessels. The image and clinical data of 2015 hemoptysis patients with 320-slice CT bronchial artery angiography were retrospectively reviewed from January 2015 to December 2019. The axial and three-dimensional CT images were analyzed. The incidence, anatomical characteristics of CBF and pulmonary disease severity score were evaluated. A total of 12 CBF vessels were detected in 11 patients. We found that the incidence of CBF in this group was 0.55% (11/2015). Mean CBF diameter was 1.9 mm (1.2-2.5 mm). The course of CBF usually was relatively fixed. The proportions of CBF originated from the left circumflex artery, right coronary artery, and left anterior descending artery were 75%, 16.7% and 8.3%, respectively. Preliminarily analysis of the correlation between the trend of CBF and the pulmonary diseases severity score showed that CBF was more likely to communicate with a bronchial artery on the side with a higher severity score. CBF may occur in patients with chronic pulmonary disease and hemoptysis, and its origin, course and trend are characteristic. Detailed and comprehensive computed tomography angiography image analysis is helpful to improve the clinical treatment of hemoptysis with CBF.
    MeSH term(s) Humans ; Bronchial Arteries/diagnostic imaging ; Hemoptysis/diagnosis ; Hemoptysis/etiology ; Hemoptysis/therapy ; Coronary Vessels/diagnostic imaging ; Retrospective Studies ; Multidetector Computed Tomography ; Lung Diseases/complications ; Lung Diseases/therapy ; Embolization, Therapeutic ; Fistula/complications ; Fistula/therapy ; Pulmonary Artery/diagnostic imaging
    Language English
    Publishing date 2022-06-21
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 89678-0
    ISSN 1615-2573 ; 0910-8327 ; 0935-736X
    ISSN (online) 1615-2573
    ISSN 0910-8327 ; 0935-736X
    DOI 10.1007/s00380-022-02106-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Modification of neutralizing epitopes of hemagglutinin for the development of broadly protective H9N2 vaccine

    Poh, Zhong Wee / Wang, Zhenzhang / Kumar, Subaschandrabose Rajesh / Yong, Hui Yee / Prabakaran, Mookkan

    Vaccine. 2020 Feb. 05, v. 38, no. 6

    2020  

    Abstract: The H9N2 avian influenza viruses cause significant economic losses in poultry worldwide and could potentially cause human pandemic. Currently, the available vaccines have limited efficacy due to antigenic drift of H9N2. To improve vaccine efficacy, we ... ...

    Abstract The H9N2 avian influenza viruses cause significant economic losses in poultry worldwide and could potentially cause human pandemic. Currently, the available vaccines have limited efficacy due to antigenic drift of H9N2. To improve vaccine efficacy, we developed monovalent vaccine strain via the modification of neutralizing epitopes on hemagglutinin (HA) to broaden the protection against H9N2 viruses. In this study, single and multiple mutation were introduced to amino acid at position 148, 150 (site I) and 183, 186, 188 (site II) on the full-length HA gene of H9N2 strain (A/Hong Kong/33982/2009). These mutant HA constructs were displayed on the baculovirus surface (BacH9), and evaluated for their cross-protective efficacy against H9N2 viruses in a mouse model. Our findings indicate that mice immunized with multiple BacH9 mutant constructs (148–150 183 and 186) induced cross-protective immunity against circulating H9N2 in the viral challenge study and prove to be a promising vaccine candidate for H9N2.
    Keywords Baculoviridae ; Influenza A virus ; amino acids ; animal models ; antigenic variation ; cross immunity ; epitopes ; financial economics ; genes ; hemagglutinins ; humans ; mutants ; mutation ; neutralization ; pandemic ; poultry ; vaccines ; viruses ; China
    Language English
    Dates of publication 2020-0205
    Size p. 1286-1290.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 605674-x
    ISSN 1873-2518 ; 0264-410X
    ISSN (online) 1873-2518
    ISSN 0264-410X
    DOI 10.1016/j.vaccine.2019.11.080
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Modification of neutralizing epitopes of hemagglutinin for the development of broadly protective H9N2 vaccine.

    Poh, Zhong Wee / Wang, Zhenzhang / Kumar, Subaschandrabose Rajesh / Yong, Hui Yee / Prabakaran, Mookkan

    Vaccine

    2020  Volume 38, Issue 6, Page(s) 1286–1290

    Abstract: The H9N2 avian influenza viruses cause significant economic losses in poultry worldwide and could potentially cause human pandemic. Currently, the available vaccines have limited efficacy due to antigenic drift of H9N2. To improve vaccine efficacy, we ... ...

    Abstract The H9N2 avian influenza viruses cause significant economic losses in poultry worldwide and could potentially cause human pandemic. Currently, the available vaccines have limited efficacy due to antigenic drift of H9N2. To improve vaccine efficacy, we developed monovalent vaccine strain via the modification of neutralizing epitopes on hemagglutinin (HA) to broaden the protection against H9N2 viruses. In this study, single and multiple mutation were introduced to amino acid at position 148, 150 (site I) and 183, 186, 188 (site II) on the full-length HA gene of H9N2 strain (A/Hong Kong/33982/2009). These mutant HA constructs were displayed on the baculovirus surface (BacH9), and evaluated for their cross-protective efficacy against H9N2 viruses in a mouse model. Our findings indicate that mice immunized with multiple BacH9 mutant constructs (148-150 183 and 186) induced cross-protective immunity against circulating H9N2 in the viral challenge study and prove to be a promising vaccine candidate for H9N2.
    MeSH term(s) Animals ; Antibodies, Viral/immunology ; Chickens ; Cross Protection ; Epitopes/genetics ; Epitopes/immunology ; Hemagglutinin Glycoproteins, Influenza Virus/genetics ; Hemagglutinin Glycoproteins, Influenza Virus/immunology ; Influenza A Virus, H9N2 Subtype/genetics ; Influenza A Virus, H9N2 Subtype/immunology ; Influenza Vaccines/genetics ; Influenza Vaccines/immunology ; Influenza in Birds/prevention & control ; Mice ; Mutation ; Orthomyxoviridae Infections/prevention & control
    Chemical Substances Antibodies, Viral ; Epitopes ; Hemagglutinin Glycoproteins, Influenza Virus ; Influenza Vaccines
    Language English
    Publishing date 2020-01-08
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 605674-x
    ISSN 1873-2518 ; 0264-410X
    ISSN (online) 1873-2518
    ISSN 0264-410X
    DOI 10.1016/j.vaccine.2019.11.080
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Incorporating G-C Pair-Recognizing Guanidinium into PNAs for Sequence and Structure Specific Recognition of dsRNAs over dsDNAs and ssRNAs.

    Krishna, Manchugondanahalli S / Wang, Zhenzhang / Zheng, Liangzhen / Bowry, Jogesh / Ong, Alan Ann Lerk / Mu, Yuguang / Prabakaran, Mookkan / Chen, Gang

    Biochemistry

    2019  Volume 58, Issue 36, Page(s) 3777–3788

    Abstract: Recognition of RNAs under physiological conditions is important for the development of chemical probes and therapeutic ligands. Nucleobase-modified dsRNA-binding PNAs (dbPNAs) are promising for the recognition of dsRNAs in a sequence and structure ... ...

    Abstract Recognition of RNAs under physiological conditions is important for the development of chemical probes and therapeutic ligands. Nucleobase-modified dsRNA-binding PNAs (dbPNAs) are promising for the recognition of dsRNAs in a sequence and structure specific manner under near-physiological conditions. Guanidinium is often present in proteins and small molecules for the recognition of G bases in nucleic acids, in cell-penetrating carriers, and in bioactive drug molecules, which might be due to the fact that guanidinium is amphiphilic and has unique hydrogen bonding and stacking properties. We hypothesized that a simple guanidinium moiety can be directly incorporated into PNAs to facilitate enhanced molecular recognition of G-C pairs in dsRNAs and improved bioactivity. We grafted a guanidinium moiety directly into a PNA monomer (designated as R) using a two-carbon linker as guided by computational modeling studies. The synthetic scheme of the PNA R monomer is relatively simple compared to that of the previously reported L monomer. We incorporated the R residue into various dbPNAs for binding studies. dbPNAs incorporated with R residues are excellent in sequence specifically recognizing G-C pairs in dsRNAs over dsDNA and ssRNAs. We demonstrated that the R residue is compatible with unmodified T and C and previously developed modified L and Q residues in dbPNAs for targeting model dsRNAs, the influenza A viral panhandle duplex structure, and the HIV-1 frameshift site RNA hairpin. Furthermore, R residues enhance the cellular uptake of PNAs.
    MeSH term(s) Animals ; Base Pairing ; Biological Transport ; DNA/genetics ; DNA/metabolism ; Guanidines/chemistry ; HIV-1/chemistry ; Hydrogen Bonding ; Hydrogen-Ion Concentration ; Models, Molecular ; Nucleic Acid Conformation ; Orthomyxoviridae/chemistry ; Peptide Nucleic Acids/chemistry ; Peptide Nucleic Acids/genetics ; Peptide Nucleic Acids/metabolism ; RNA, Double-Stranded/genetics ; RNA, Double-Stranded/metabolism ; RNA, Viral/genetics ; RNA, Viral/metabolism ; Spodoptera/chemistry
    Chemical Substances Guanidines ; Peptide Nucleic Acids ; RNA, Double-Stranded ; RNA, Viral ; DNA (9007-49-2)
    Language English
    Publishing date 2019-08-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1108-3
    ISSN 1520-4995 ; 0006-2960
    ISSN (online) 1520-4995
    ISSN 0006-2960
    DOI 10.1021/acs.biochem.9b00608
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Incorporating G-C Pair-Recognizing Guanidinium into PNAs for Sequence and Structure Specific Recognition of dsRNAs over dsDNAs and ssRNAs

    Krishna, Manchugondanahalli S / Wang, Zhenzhang / Zheng, Liangzhen / Bowry, Jogesh / Ong, Alan Ann Lerk / Mu, Yuguang / Prabakaran, Mookkan / Chen, Gang

    Biochemistry. 2019 Aug. 19, v. 58, no. 36

    2019  

    Abstract: Recognition of RNAs under physiological conditions is important for the development of chemical probes and therapeutic ligands. Nucleobase-modified dsRNA-binding PNAs (dbPNAs) are promising for the recognition of dsRNAs in a sequence and structure ... ...

    Abstract Recognition of RNAs under physiological conditions is important for the development of chemical probes and therapeutic ligands. Nucleobase-modified dsRNA-binding PNAs (dbPNAs) are promising for the recognition of dsRNAs in a sequence and structure specific manner under near-physiological conditions. Guanidinium is often present in proteins and small molecules for the recognition of G bases in nucleic acids, in cell-penetrating carriers, and in bioactive drug molecules, which might be due to the fact that guanidinium is amphiphilic and has unique hydrogen bonding and stacking properties. We hypothesized that a simple guanidinium moiety can be directly incorporated into PNAs to facilitate enhanced molecular recognition of G-C pairs in dsRNAs and improved bioactivity. We grafted a guanidinium moiety directly into a PNA monomer (designated as R) using a two-carbon linker as guided by computational modeling studies. The synthetic scheme of the PNA R monomer is relatively simple compared to that of the previously reported L monomer. We incorporated the R residue into various dbPNAs for binding studies. dbPNAs incorporated with R residues are excellent in sequence specifically recognizing G-C pairs in dsRNAs over dsDNA and ssRNAs. We demonstrated that the R residue is compatible with unmodified T and C and previously developed modified L and Q residues in dbPNAs for targeting model dsRNAs, the influenza A viral panhandle duplex structure, and the HIV-1 frameshift site RNA hairpin. Furthermore, R residues enhance the cellular uptake of PNAs.
    Keywords DNA ; RNA ; bioactive properties ; drugs ; guanidinium ; hydrogen bonding ; influenza ; ligands ; models ; moieties ; proteins ; therapeutics
    Language English
    Dates of publication 2019-0819
    Size p. 3777-3788.
    Publishing place American Chemical Society
    Document type Article
    Note NAL-light
    ZDB-ID 1108-3
    ISSN 1520-4995 ; 0006-2960
    ISSN (online) 1520-4995
    ISSN 0006-2960
    DOI 10.1021/acs.biochem.9b00608
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  6. Article: [Application of Gemstone Spectrum Imaging for anterior spinal artery in patients with cervical spinal injury].

    Zhu, Min-Yu / Tian, Ji-Wei / Teng, Hong-Lin / Wu, Shi-Yang / Wang, Yu / Wang, Jing / Wang, Zhen-Zhang

    Zhongguo gu shang = China journal of orthopaedics and traumatology

    2018  Volume 31, Issue 5, Page(s) 425–430

    Abstract: Objective: To discuss the value of Gemstone Spectrum Imaging (GSI) CT anterior spinal artery angiography in the patients with cervical spinal cord injury, and to evaluate the correlation between the change of the blood flow of the anterior spinal artery ...

    Abstract Objective: To discuss the value of Gemstone Spectrum Imaging (GSI) CT anterior spinal artery angiography in the patients with cervical spinal cord injury, and to evaluate the correlation between the change of the blood flow of the anterior spinal artery and the postoperative recovery of nerve function.
    Methods: From January 2014 to June 2016, thirty patients who underwent cervical open door laminoplasty for spinal cord injury were retrospective analyzed and included 21 males and 9 females with an average age of (46.4±9.7) years old ranging from 33 to 59 years. Within 2 weeks after injury, open door laminoplasty was performed through cervical posterior approach. Among them, there were 8 cases of 3 segments of open door decompression, 18 cases of 4 segments, 4 cases of 5 segments. GSI CT were performed at 3 days before operation and 5 days after operation. The anterior spinal artery was reconstructed and evaluated the improvement of blood flow after operation. The cervical JOA score was calculated at 1 day before operation, 5 days after operation and 1, 6 and 12 months after operation, and the JOA score improvement rate of the corresponding follow-up points was calculated.
    Results: All patients were followed up for 12 to 30 months with an average of (17.4±7.6) months. The iodine content ratio (ASA/VA) of the anterior spinal artery before and after operation was 0.75±0.20 and 0.89±0.02 respectively, the postoperative improvement was significantly higher than that before operation(
    Conclusions: GSI CT anterior spinal artery angiography is safe and feasible, the imaging is satisfactory, it can quantitatively evaluated the blood flow of the anterior spinal artery. There was a positive linear correlation between the improvement of blood flow in anterior spinal artery and the recovery of neurological function. Early postoperative improvement of blood flow in the anterior spinal artery can be used as a reference index for predicting the recovery of neurological function in patients.
    MeSH term(s) Adult ; Cervical Vertebrae ; Decompression, Surgical ; Female ; Humans ; Laminoplasty ; Male ; Middle Aged ; Retrospective Studies ; Spinal Injuries/diagnosis
    Language Chinese
    Publishing date 2018-06-12
    Publishing country China
    Document type Journal Article
    ISSN 1003-0034
    ISSN 1003-0034
    DOI 10.3969/j.issn.1003-0034.2018.05.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Is the Cervical Anterior Spinal Artery Compromised in Cervical Spondylotic Myelopathy Patients? Dual-Energy Computed Tomography Analysis of Cervical Anterior Spinal Artery.

    Wu, Shiyang / Chandoo, Suraj / Zhu, Minyu / Huang, Kelun / Wang, Yu / Wang, Zhenzhang / Teng, Hong Lin

    World neurosurgery

    2018  Volume 115, Page(s) e152–e159

    Abstract: Objective: Cervical myelopathy is a common, acquired cause of spinal cord dysfunction in older patients. It is postulated that a hypoxic or ischemic environment secondary to chronic spinal cord compression plays an important role in the pathogenesis of ... ...

    Abstract Objective: Cervical myelopathy is a common, acquired cause of spinal cord dysfunction in older patients. It is postulated that a hypoxic or ischemic environment secondary to chronic spinal cord compression plays an important role in the pathogenesis of myelopathy. This study aims to use dual-energy computed tomography (DECT) to assess the altered blood flow to the spinal cord in patients with cervical spondylotic myelopathy (CSM). To our knowledge, this study is the first to use DECT in identifying comprised anterior spinal artery blood flow in patients with CSM.
    Methods: Fifty patients with single disc level CSM and 10 volunteers without CSM underwent DECT of the cervical spine to analyze and compare the ASA. The neurologic status of each patient was evaluated preoperatively and postoperatively at 5 days, 1 month, and 6 months using the Japanese Orthopedic Association (JOA) score. All the patients with CSM underwent single-level anterior cervical discectomy and fusion, and at postoperative day 5, each patient underwent repeated DECT. The anterior spinal artery before and after surgery was compared in patients with CSM. The blood flow in terms of iodine content at a specific region of interest was measured in the axial CT of the volunteers group and in the preoperative and postoperative axial CT of patients with CSM. Correlations between change in blood flow and clinical improvement at each follow-up point were analyzed statistically.
    Results: Iodine content (100 mg/mL) was 14.2800 ± 1.89527 at the C3/C4 disc level, 14.8280 ± 1.83820 at the C4/C5 disc level, and 15.5000 ± 2.41048 at the C5/C6 level. In patients with CSM, the preoperative iodine content (100 mg/mL) measured was 10.2621 ± 2.37396 in C3/C4 disc-level compression, 12.1438 ± 1.63447 in C4/C5 disc-level compression, and 14.0620 ± 2.44390 in C5/C6 disc-level compression. Postoperative iodine content (100 mg/mL) measurement changed to 13.78 ± 2.77 for the C3/C4 disc level, 14.16 ± 1.90 for the C4/C5 disc level, and 15.14 ± 2.62 for the C5/C6 disc level. The JOA score was 13.650 preoperatively, 14.010 at 5 days postoperatively, 14.630 at 1 month postoperatively, and 15.000 at 6 months postoperatively. The 1- and 6-month correlation ratios between the JOA and change in blood flow were statistically significant, with an r value of 0.746 (P < 0.05) and 0.760 (P < 0.05), respectively.
    Conclusions: This study provided evidence for the benefit of DECT as a radiographic tool for identifying the compromised cervical anterior spinal artery in patients with CSM. We believe that DECT is the one of the best radiographic tools available to provide an objective screening tool to detect compromised blood flow in patients with CSM.
    MeSH term(s) Adult ; Aged ; Cervical Vertebrae/blood supply ; Cervical Vertebrae/diagnostic imaging ; Cervical Vertebrae/surgery ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Prospective Studies ; Spinal Cord Diseases/diagnostic imaging ; Spinal Cord Diseases/surgery ; Spondylosis/diagnostic imaging ; Spondylosis/surgery ; Tomography, X-Ray Computed/methods ; Vertebral Artery/diagnostic imaging ; Vertebral Artery/surgery
    Language English
    Publishing date 2018-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2018.03.217
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Sequence- And Structure-Specific Probing of RNAs by Short Nucleobase-Modified dsRNA-Binding PNAs Incorporating a Fluorescent Light-up Uracil Analog.

    Krishna, Manchugondanahalli S / Toh, Desiree-Faye Kaixin / Meng, Zhenyu / Ong, Alan Ann Lerk / Wang, Zhenzhang / Lu, Yunpeng / Xia, Kelin / Prabakaran, Mookkan / Chen, Gang

    Analytical chemistry

    2019  Volume 91, Issue 8, Page(s) 5331–5338

    Abstract: RNAs are emerging as important biomarkers and therapeutic targets. The strategy of directly targeting double-stranded RNA (dsRNA) by triplex-formation is relatively underexplored mainly due to the weak binding at physiological conditions for the ... ...

    Abstract RNAs are emerging as important biomarkers and therapeutic targets. The strategy of directly targeting double-stranded RNA (dsRNA) by triplex-formation is relatively underexplored mainly due to the weak binding at physiological conditions for the traditional triplex-forming oligonucleotides (TFOs). Compared to DNA and RNA, peptide nucleic acids (PNAs) are chemically stable and have a neutral peptide-like backbone, and thus, they show significantly enhanced binding to natural nucleic acids. We have successfully developed nucleobase-modified dsRNA-binding PNAs (dbPNAs) to facilitate structure-specific and selective recognition of dsRNA over single-stranded RNA (ssRNA) and dsDNA regions at near-physiological conditions. The triplex formation strategy facilitates the targeting of not only the sequence but also the secondary structure of RNA. Here, we report the development of novel dbPNA-based fluorescent light-up probes through the incorporation of A-U pair-recognizing 5-benzothiophene uracil (
    MeSH term(s) Base Sequence ; Binding Sites ; Fluorescence ; Molecular Structure ; Nucleic Acid Conformation ; Peptide Nucleic Acids/chemistry ; RNA/chemistry ; Spectrometry, Fluorescence ; Uracil/analogs & derivatives ; Uracil/chemistry
    Chemical Substances Peptide Nucleic Acids ; Uracil (56HH86ZVCT) ; RNA (63231-63-0)
    Language English
    Publishing date 2019-03-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.9b00280
    Database MEDical Literature Analysis and Retrieval System OnLINE

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