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Nguyen CN, Nguyen DT, Tran HA, Mac DH, Nguyen TTT, Retailleau P, Nguyen TB. Base- and sulfur-promoted oxidative lactonization of chalcone-acetate Michael adducts: access to pyran-2-ones. Org Biomol Chem 2024. [PMID: 38651649 DOI: 10.1039/d4ob00479e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
A cost-effective, practical, straightforward and scalable synthesis of α-pyrones via base- and sulfur-promoted annulation of phenylacetates and chalcones is reported. Generated in situ from the starting components by using dbu as a base catalyst, the Michael adducts underwent a smooth oxidative cyclization into 3,4,6-triaryl-2-pyranones upon heating with DABCO and sulfur in DMSO. Extension to malonate in place of phenylacetates led to 4,6-diaryl-2-pyranone-2-carboxylates.
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Affiliation(s)
- Cao Nguyen Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Duc Toan Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Ha An Tran
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Dinh Hung Mac
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam.
| | - Thi Thu Tram Nguyen
- Department of Chemistry, Faculty of Basic Science, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
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Tran VK, Cao MH, Nguyen TTH, Le PT, Tran HA, Vu DC, Nguyen HT, Nguyen MTP, Bui TH, Nguyen TB, Ta TV, Tran TH. A novel IGHMBP2 variant and clinical diversity in Vietnamese SMARD1 and CMT2S patients. Front Pediatr 2024; 12:1165492. [PMID: 38415210 PMCID: PMC10896978 DOI: 10.3389/fped.2024.1165492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 01/26/2024] [Indexed: 02/29/2024] Open
Abstract
Background Pathogenic variants in the IGHMBP2 gene are associated with two distinct autosomal recessive neuromuscular disorders: spinal muscular atrophy with respiratory distress type 1 (SMARD1; OMIM #604320) and Charcot-Marie-Tooth type 2S (CMT2S; OMIM #616155). SMARD1 is a severe and fatal condition characterized by infantile-onset respiratory distress, diaphragmatic palsy, and distal muscular weakness, while CMT2S follows a milder clinical course, with slowly progressive distal muscle weakness and sensory loss, without manifestations of respiratory disorder. Methods Whole-exome sequencing of the IGHMBP2 gene was performed for eight Vietnamese patients with IGHMBP2-related neuromuscular disorders including five patients with SMARD1 and the others with CMT2S. Results We identified one novel IGHMBP2 variant c.1574T > C (p.Leu525Pro) in a SMARD1 patient. Besides that, two patients shared the same pathogenic variants (c.1235 + 3A > G/c.1334A > C) but presented completely different clinical courses: one with SMARD1 who deceased at 8 months of age, the other with CMT2S was alive at 3 years old without any respiratory distress. Conclusion This study is the first to report IGHMBP-2-related neuromuscular disorders in Vietnam. A novel IGHMBP2 variant c.1574T > C (p.Leu525Pro) expressing SMARD1 phenotype was detected. The presence of three patients with the same genotype but distinct clinical outcomes suggested the interaction of variants and other factors including relating modified genes in the mechanism of various phenotypes.
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Affiliation(s)
- Van Khanh Tran
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
- Department of Molecular Pathology, Faculty of Medical Laboratory Technology, Hanoi Medical University, Hanoi, Vietnam
| | - My Ha Cao
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | | | - Phuong Thi Le
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Hai Anh Tran
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Dung Chi Vu
- Department of Endocrinology, Metabolism and Genetics, National Hospital of Pediatrics, Hanoi, Vietnam
| | - Ha Thu Nguyen
- Department of Endocrinology, Metabolism and Genetics, National Hospital of Pediatrics, Hanoi, Vietnam
| | | | - The-Hung Bui
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
- Center for Molecular Medicine, Clinical Genetics Unit, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
| | - Thanh Binh Nguyen
- Center for Gene and Protein Research, Hanoi Medical University, Hanoi, Vietnam
| | - Thanh Van Ta
- Department of Biochemistry, Hanoi Medical University, Hanoi, Vietnam
- Clinical Laboratory, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
| | - Thinh Huy Tran
- Department of Biochemistry, Hanoi Medical University, Hanoi, Vietnam
- Clinical Laboratory, Hanoi Medical University Hospital, Hanoi Medical University, Hanoi, Vietnam
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Le DL, Nguyen LA, Vo NB, Nguyen TTT, Ngo QA, Retailleau P, Nguyen TB. Sodium sulfide-promoted regiodefined redox condensation of o-nitroanilines with aryl ketones to benzo[ a]phenazines and quinoxalines. Org Biomol Chem 2024; 22:1167-1171. [PMID: 38226902 DOI: 10.1039/d3ob02028b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
Inexpensive sodium sulfide trihydrate was found to promote unprecedented 6e-regio-predefined redox condensation of o-nitroanilines with α-tetralones to benzo[a]phenazines. The method was also successfully extended to acetophenones and higher homologs as reducing partners to provide 2-phenylquinoxalines. Compared to traditional approaches toward benzo[a]phenazine and quinoxaline cores starting with o-phenylenediamines, the present strategy could afford these heterocycles with well-defined regiochemistry based on the structure of starting o-nitroanilines.
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Affiliation(s)
- Duc Long Le
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
| | - Le Anh Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
| | - Ngoc Binh Vo
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
| | - Thi Thu Tram Nguyen
- Department of Chemistry, Faculty of Basic Science, Can Tho University of Medicine and Pharmacy, Vietnam
| | - Quoc Anh Ngo
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
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Phaenok S, Nguyen LA, Soorukram D, Nguyen TTT, Retailleau P, Nguyen TB. Sulfur- and Amine- Promoted Multielectron Autoredox Transformation of Nitromethane: Multicomponent Access to Thiourea Derivatives. Chemistry 2024; 30:e202303703. [PMID: 37953668 DOI: 10.1002/chem.202303703] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 11/12/2023] [Accepted: 11/13/2023] [Indexed: 11/14/2023]
Abstract
Thiourea derivatives are in-demand motifs in organic synthesis, medicinal chemistry and material science, yet redox methods for the synthesis that start from safe, simple, inexpensive and readily available feedstocks are scarce. In this article, we disclose the synthesis of these motifs using elemental sulfur and nitromethane as the starting materials. The method harnesses the multi-electron auto-redox property of nitromethane in the presence of sulfur and amines, delivering thiourea products without any added oxidant or reductant. Extension of this reaction to cyclizable amines and/or higher homologues of nitromethane led to a wide range of nitrogen heterocycles and thioamides. Operationally simple, the reactions are scalable, tolerate a wide range of functional groups, and can be employed for the direct functionalization of natural products. Mechanistically, the nitro group was found to act as an oxidant leaving group, being reduced to ammonia whereas sulfur, along with the role of a sulfur building block for the thiocarbonyl group, behaved as a complementary reductant, being oxidized to sulfate.
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Affiliation(s)
- Supasorn Phaenok
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301 Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198, Gif-sur-Yvette, France
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand
| | - Le Anh Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand
| | - Thi Thanh Tam Nguyen
- Univ Paris Est Creteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 rue Henri Dunant, 94320, Thiais, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301 Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301 Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198, Gif-sur-Yvette, France
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Pham TM, Cao DV, Dang HHQ, Mai PMT, Nguyen TB, Dinh NBN, Nguyen TKG, Le TMH, Doan VD, Nguyen DT, Le VT. 153Sm-labeled Fe 3O 4@lapatinib nanoparticles as a potential therapeutic agent for breast cancer: synthesis, quality control, and in vivo evaluation. J Mater Chem B 2024; 12:678-690. [PMID: 38116646 DOI: 10.1039/d3tb01957h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The present study introduces Fe3O4-coated lapatinib-labeled 153Sm nanoparticles (denoted as Fe3O4@lapatinib-153Sm) as a promising avenue for advancing breast cancer treatment. The radiolabeled nanoparticles combine various attributes, offering enhanced therapeutic precision. The integration of lapatinib confers therapeutic effects and targeted delivery. The inherent magnetic characteristics of Fe3O4 nanoparticles contribute to improved imaging contrast and targeted localization. Incorporating the gamma-emitting 153Sm isotope permits single-photon emission computed tomography imaging and radiation dose evaluation, while its beta-emitting nature ensures targeted cancer cell eradication. The synthesis of Fe3O4@lapatinib-153Sm was meticulously optimized by investigating the effects of parameters on radiolabeling efficiency. Physicochemical attributes were scrutinized using several analytical techniques. In-depth in vivo assessment evaluated the biocompatibility, toxicity, and biodistribution in a murine model, illuminating clinical utility. Optimal conditions (153SmCl3 concentration of 10 mCi mL-1, pH 7.4, a reaction time of 30 min, and a temperature of 25 °C) achieved >99% labeling efficiency and radiochemical purity. The TEM analysis indicated that the diameter of Fe3O4@lapatinib-153Sm nanoparticles ranged from 10 to 40 nm. Vibrating-sample magnetometry verified their superparamagnetic behaviour with a saturation magnetization of 41.4 emu g-1. The synthesized radiopharmaceutical exhibited high sterility and in vitro stability. Acute toxicity studies showed the mild effects of Fe3O4@lapatinib-153Sm at a dose of 20 mCi kg-1, with no observed mortality. Notably, lesions from Fe3O4@lapatinib-153Sm use recovered naturally over time. Radiation doses below 20 mCi kg-1 were recommended for clinical trials. The biodistribution study in BT474 xenograft mice revealed rapid clearance of Fe3O4@lapatinib-153Sm within 48 h. Significant accumulation occurred in the liver, spleen, and tumor tissue, while minimal accumulation was found in other tissues. Future steps involve studying biocorona formation and therapeutic efficacy on tumour models, refining its clinical potential.
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Affiliation(s)
- Thanh Minh Pham
- Dalat Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat, 670000, Vietnam.
| | - Dong Vu Cao
- Dalat Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat, 670000, Vietnam.
| | - Ho Hong Quang Dang
- Dalat Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat, 670000, Vietnam.
| | | | - Thanh Binh Nguyen
- Dalat Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat, 670000, Vietnam.
| | - Ngoc Bao Nam Dinh
- Dalat Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat, 670000, Vietnam.
| | | | - Thi Mai Huong Le
- Nuclear Training Center, Vietnam Atomic Energy Institute, 140 Nguyen Tuan Street, Thanh Xuan District, Hanoi, 110430, Vietnam
| | - Van Dat Doan
- The Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, 70000, Vietnam
| | - Duc Thuan Nguyen
- Lam Dong Department of Health, 36 Tran Phu, Lam Dong, 670000, Vietnam
| | - Van Thuan Le
- Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, 550000, Vietnam.
- Faculty of Natural Sciences, Duy Tan University, 03 Quang Trung, Da Nang, 550000, Vietnam
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Pham BD, Kim BG, Esterman A, Brodaty H, Kurrle S, Nguyen TB, Nguyen TH, Roughead E, Hinton L, Dang TH, Nguyen TDH, Tran K, Crotty M, Du D, Nguyen TA. Knowledge, attitudes and self-confidence with skills required for providing dementia care in physicians at primary healthcare settings in Vietnam. BMC Health Serv Res 2024; 24:86. [PMID: 38233921 PMCID: PMC10792887 DOI: 10.1186/s12913-023-10460-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 12/08/2023] [Indexed: 01/19/2024] Open
Abstract
BACKGROUND Dementia is a global public health priority. The World Health Organization adopted a Global Action Plan on Dementia, with dementia awareness a priority. This study examined the knowledge, attitudes, and self-confidence with skills required for providing dementia care among primary health care providers in Vietnam. METHODS A cross-sectional study was conducted with 405 primary health care providers who worked at commune health stations and district health centers in eight provinces across Vietnam. RESULTS The results showed that primary health care providers had poor knowledge and little confidence but more positive attitudes toward dementia care and management. CONCLUSIONS The results suggest the training needs for building capacity amongst primary health care providers, which will be critical as Vietnam's population ages.
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Affiliation(s)
- Bich Diep Pham
- School of Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Bao Giang Kim
- School of Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam.
| | - Adrian Esterman
- UniSA: Allied Health & Human Performance, University of South Australia, Adelaide, SA, Australia
| | - Henry Brodaty
- Centre for Healthy Brain Ageing (CHeBA), School of Clinical Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Susan Kurrle
- The University of Sydney, Sydney, NSW, Australia
| | | | | | - Elizabeth Roughead
- UniSA: Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
| | - Ladson Hinton
- University of California, Davis, Sacramento, CA, USA
| | - Thu Ha Dang
- Swinburne University of Technology, Melbourne, VIC, Australia
- National Ageing Research Institute, Melbourne, VIC, Australia
| | - Thi Diem Huong Nguyen
- School of Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Kham Tran
- National Ageing Research Institute, Melbourne, VIC, Australia
- Flinders University, Adelaide, SA, Australia
- UniSA: Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
| | | | - Duc Du
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Tuan Anh Nguyen
- Swinburne University of Technology, Melbourne, VIC, Australia
- National Ageing Research Institute, Melbourne, VIC, Australia
- Health Strategy and Policy Institute, Ministry of Health of Vietnam, Hanoi, Vietnam
- UniSA: Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
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Phi DL, Dao TL, To MM, Nguyen TB, Nguyen DC, Gautret P, Hoang VT. Clinical and Laboratory Characteristics of Kawasaki Disease and COVID-19-Related Multisystem Inflammatory Syndrome in Children. J Korean Med Sci 2023; 38:e410. [PMID: 38111281 PMCID: PMC10727921 DOI: 10.3346/jkms.2023.38.e410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 09/14/2023] [Indexed: 12/20/2023] Open
Abstract
Geographical and racial factors constitute important distinctions between Kawasaki disease (KD) and multisystem inflammatory syndrome in children (MIS-C), but no study has been conducted in Vietnam. Forty-one children with KD from January 2018 to July 2020 and 42 with KD/MIS-C from August 2020 to December 2022 were included in this study. Of the patients, 52.3% were aged between 12 and 35 months. Only two were aged over 5 years, and both were belong to the KD/MIS-C group. A 59.5% of the patients were male. Apart from fever, all symptoms tended to be more frequent in patients with KD/MIS-C. The prevalence of diffuse skin rash, hand and foot edema or erythema and gastrointestinal signs was significantly higher in patients hospitalized with KD/MIS-C. There was no significant difference in laboratory findings between the two groups. Coronary artery dilation was more frequently observed in patients with KD/MIS-C compared to those with KD (40.5% vs. 14.6%, P = 0.009).
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Affiliation(s)
- Duc Long Phi
- Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Thi Loi Dao
- Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Minh Manh To
- Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | | | - Duy Cuong Nguyen
- Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
| | - Philippe Gautret
- Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam
- IHU-Méditerranée Infection, Marseille, France
- Aix Marseille University, IRD, AP-HM, SSA, VITROME, Marseille, France
| | - Van Thuan Hoang
- Thai Binh University of Medicine and Pharmacy, Thai Binh, Vietnam.
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Pan Q, Portelli S, Nguyen TB, Ascher DB. Characterization on the oncogenic effect of the missense mutations of p53 via machine learning. Brief Bioinform 2023; 25:bbad428. [PMID: 38018912 PMCID: PMC10685404 DOI: 10.1093/bib/bbad428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 10/13/2023] [Accepted: 11/05/2023] [Indexed: 11/30/2023] Open
Abstract
Dysfunctions caused by missense mutations in the tumour suppressor p53 have been extensively shown to be a leading driver of many cancers. Unfortunately, it is time-consuming and labour-intensive to experimentally elucidate the effects of all possible missense variants. Recent works presented a comprehensive dataset and machine learning model to predict the functional outcome of mutations in p53. Despite the well-established dataset and precise predictions, this tool was trained on a complicated model with limited predictions on p53 mutations. In this work, we first used computational biophysical tools to investigate the functional consequences of missense mutations in p53, informing a bias of deleterious mutations with destabilizing effects. Combining these insights with experimental assays, we present two interpretable machine learning models leveraging both experimental assays and in silico biophysical measurements to accurately predict the functional consequences on p53 and validate their robustness on clinical data. Our final model based on nine features obtained comparable predictive performance with the state-of-the-art p53 specific method and outperformed other generalized, widely used predictors. Interpreting our models revealed that information on residue p53 activity, polar atom distances and changes in p53 stability were instrumental in the decisions, consistent with a bias of the properties of deleterious mutations. Our predictions have been computed for all possible missense mutations in p53, offering clinical diagnostic utility, which is crucial for patient monitoring and the development of personalized cancer treatment.
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Affiliation(s)
- Qisheng Pan
- School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane Queensland 4072, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne Victoria 3004, Australia
| | - Stephanie Portelli
- School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane Queensland 4072, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne Victoria 3004, Australia
| | - Thanh Binh Nguyen
- School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane Queensland 4072, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne Victoria 3004, Australia
| | - David B Ascher
- School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane Queensland 4072, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne Victoria 3004, Australia
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Nguyen TB, Nguyen TTH, Huynh SQ, Phu TV, Taha AM, Nguyen D, Le HM, Nguyen HN, Nguyen LTK, Tran NT. Seroprevalence of Toxocara at Tra Vinh University Hospital in Vietnam. Eur Rev Med Pharmacol Sci 2023; 27:10334-10341. [PMID: 37975357 DOI: 10.26355/eurrev_202311_34308] [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: 11/19/2023]
Abstract
OBJECTIVE The study aims to assess the seroprevalence of Toxocariasis and its associated risk factors among individuals attending the outpatient department at Tra Vinh University Hospital, Vietnam, in 2022. SUBJECTS AND METHODS A cross-sectional survey was conducted among outpatients of Tra Vinh University Hospital. Toxocariasis diagnosis was based on the Enzyme-Linked Immunosorbent Assay (ELISA) performed at the hospital's laboratory department. We assessed the seroprevalence of Toxocariasis and evaluated associated risk factors, including demographics and certain behaviors. RESULTS Of the 249 participants surveyed, 165 tested positive for Toxocariasis, yielding a seroprevalence of 66.3% (95% CI: 60.4-72.1). Multivariate analysis revealed that age groups up to 30 and 30-60 years had higher odds of Toxocariasis infection, with adjusted odds ratios (aOR) of 2.52 (95% CI: 1.04-6.11) and 3.21 (95% CI: 1.44-7.15) respectively. Additionally, individuals residing in rural areas and those in contact with dogs or cats had increased risks, with aORs of 2.21 (95% CI: 1.21-4.01) and 2.04 (95% CI: 1.10-3.79), respectively. Notably, hand washing before eating emerged as a protective factor against Toxocariasis, presenting an aOR of 0.38 (95% CI: 0.19-0.76). CONCLUSIONS Our findings underscore a significant seroprevalence (66.3%) of Toxocara spp. among outpatients at Tra Vinh University Hospital. Proactive measures, including hand hygiene before meals and after pet interactions, are advocated. There is a pronounced need for community-level epidemiological surveillance for human Toxocariasis.
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Affiliation(s)
- T B Nguyen
- Faculty of Medicine and Pharmacy, Tra Vinh University, Tra Vinh, Vietnam.
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Nguyen TMC, Hoang LDC, Nguyen TKG, Nguyen TN, Nguyen QC, Nguyen TB, Dang HHQ, Bui VC, Pham TM, Nguyen TT. Safety assessment, radioiodination and preclinical evaluation of antinuclear antibody as novel medication for prostate cancer in mouse xenograft model. Sci Rep 2023; 13:18753. [PMID: 37907691 PMCID: PMC10618443 DOI: 10.1038/s41598-023-45984-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 10/26/2023] [Indexed: 11/02/2023] Open
Abstract
This study aims to provide in vitro and in vivo data to support the utilization of antinuclear antibodies (ANAs) as novel tools for the diagnosis and treatment of prostate cancers. The hematological, biochemical, and histological toxicities of ANAs were assessed at the doses of 5 and 50 μg per mouse. Radiolabeling study was then conducted with ANA and 131I using the chloramine T method, and the biodistribution and treatment efficacy were subsequently investigated in a PC3 xenograft model. No changes in clinical behavior or signs of intoxication, necrosis, or malignancy were observed in ANA-treated mice. 131I-ANA was obtained in very high yield and radiochemical purity, at 94.97 ± 0.98% and 98.56 ± 0.29%, respectively. They achieved immunoreactivity fraction of 0.841 ± 0.17% with PC-3 cells. Levels of radiolabeled ANAs were 1.15-10.14 times higher in tumor tissues than in other examined organs at 24 h post-injection. The tumor growth inhibition rates were 28.33 ± 5.01% in PC3 xenografts mice treated with 131I-ANAs compared with controls and a nearly twofold improvement in median survival was observed. These results demonstrate that radioimmunotherapy of radiolabeled natural ANAs may be an effective treatment for prostate tumors.
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Affiliation(s)
- Thu Minh Chau Nguyen
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam
- Hanoi Medical University, Hanoi, Vietnam
| | | | - Thi Khanh Giang Nguyen
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam
| | - Thi Ngoc Nguyen
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam
| | - Quang Chien Nguyen
- Department of Hematology and Blood Transfusion, Vietnam Military Medical University, Military Hospital 103, Hanoi, Vietnam
| | - Thanh Binh Nguyen
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam
| | - Ho Hong Quang Dang
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam
| | - Van Cuong Bui
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam
| | - Thanh Minh Pham
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam
| | - Thi Thu Nguyen
- Center for Research and Production of Radioisotopes, Nuclear Research Institute, 01 Nguyen Tu Luc Street, Dalat, Lam-Dong, Vietnam.
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Tran TMC, Lai ND, Bui TTT, Mac DH, Nguyen TTT, Retailleau P, Nguyen TB. DABCO-Catalyzed DMSO-Promoted Sulfurative 1,2-Diamination of Phenylacetylenes with Elemental Sulfur and o-Phenylenediamines: Access to Quinoxaline-2-thiones. Org Lett 2023; 25:7225-7229. [PMID: 37738043 DOI: 10.1021/acs.orglett.3c02835] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
The oxidative amination of alkynes typically requires transition metal catalysts and strong oxidants. Herein, we alternatively utilize DABCO as a sulfur-activating catalyst to achieve the sulfurative 1,2-diamination of phenylacetylenes with elemental sulfur and o-phenylenediamines. DMSO was found to be particularly suitable for use as a terminal oxidant for this three-component process. A mechanistic study has shown that this cascade reaction is triggered by the addition of active sulfur species to the triple bond of phenylacetylenes.
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Affiliation(s)
- Thi Minh Chau Tran
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Nang Duy Lai
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Thai Thanh Thu Bui
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Dinh Hung Mac
- Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Thi Thu Tram Nguyen
- Department of Chemistry, Faculty of Basic Science, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
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12
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Innes AL, Nguyen ST, Lebrun V, Nguyen TTH, Huynh TP, Quach VL, Hoang GL, Nguyen TB, Nguyen TBP, Pham HM, Martinez A, Dinh N, Dinh VL, Nguyen BH, Truong TTH, Nguyen VC, Nguyen VN, Mai TH. Tuberculin skin testing and QuantiFERON™-TB Gold Plus positivity among household contacts in Vietnam. Public Health Action 2023; 13:83-89. [PMID: 37736581 PMCID: PMC10446657 DOI: 10.5588/pha.23.0020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 05/31/2023] [Indexed: 09/23/2023] Open
Abstract
SETTING TB infection (TBI) is diagnosed using the technique-dependent tuberculin skin test (TST) or costly, more accurate interferon-gamma release assays. The TST (⩾10 mm) threshold was indicated by previous research among household contacts in Vietnam, but routine implementation with a different tuberculin reagent showed unexpectedly low TST positivity. OBJECTIVE TST (⩾5 mm and ⩾10 mm) results were compared to QuantiFERON™-TB Gold Plus (QFT) results in household contacts during community campaigns in 2020 and 2021. DESIGN This was a cross-sectional multi-center implementation study. RESULTS Among 1,330 household contacts in 2020, we found a TBI prevalence of 38.6% (QFT), similar to TST ⩾5 mm (37.4%) and higher than TST ⩾10 mm (13.1%). QFT+/TST+ was higher for TST ⩾5 mm (20.7%) than TST ⩾10 mm (9.4%). QFT was not discordant with TST ⩾5 mm (McNemar's test = 0.6, P = 0.5) but was discordant with TST ⩾10 mm (McNemar's test = 263.9, P < 0.01). Older age and Southern region increased odds for positive TST ⩾5 mm and QFT with weaker associations for TST ⩾10 mm. Agreement and discordance were similar in 2021 for 1,158 household contacts. CONCLUSION Tuberculin reagents affect TST positivity rates. High TB burden countries should monitor reliability of TBI diagnosis, including tuberculin potency, cold chain, and TST technique to optimize eligibility for TB preventive treatment.
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Affiliation(s)
- A L Innes
- FHI 360 Asia Pacific Regional Office, Bangkok, Thailand
| | - S T Nguyen
- University of California, San Francisco, CA, USA
| | | | | | | | | | | | | | | | - H M Pham
- United States Agency for International Development Vietnam, Hanoi, Vietnam
| | | | | | - V L Dinh
- Vietnam National Lung Hospital/National Tuberculosis Programme Hanoi, Vietnam
| | - B H Nguyen
- Vietnam National Lung Hospital/National Tuberculosis Programme Hanoi, Vietnam
| | - T T H Truong
- Vietnam National Lung Hospital/National Tuberculosis Programme Hanoi, Vietnam
| | - V C Nguyen
- Vietnam National Lung Hospital/National Tuberculosis Programme Hanoi, Vietnam
| | - V N Nguyen
- Vietnam National Lung Hospital/National Tuberculosis Programme Hanoi, Vietnam
| | - T H Mai
- FHI 360 Vietnam, Hanoi, Vietnam
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13
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Nguyen VP, Nguyen NNH, Lai ND, Mac DH, Retailleau P, Nguyen TB. Sulfur-Promoted Oxidative Cyclization of Pentan-1-ones: Direct Access to Tetrasubstituted Furans from Deoxybenzoins and Chalcones. Org Lett 2023; 25:6419-6423. [PMID: 37606266 DOI: 10.1021/acs.orglett.3c02447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Furan is an important heterocyclic scaffold in natural product, bioorganic, and medicinal chemistry as well as in materials science. The system S8/DABCO/DMSO was found to efficiently mediate the oxidative cyclization of 1,2,3,5-tetraarylpentan-1-ones A, which were obtained in situ as the Michael adducts of chalcones 1 and deoxybenzoins 2, to furan 3. The strategy provided convenient and direct access to tetrasubstituted furans 3 from readily available starting materials with high functional group tolerance.
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Affiliation(s)
- Van Phu Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Nhu Ngan Ha Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Nang Duy Lai
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Dinh Hung Mac
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Vietnam
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette France
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14
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Do TH, Phaenok S, Soorukram D, Modjinou T, Grande D, Nguyen TTT, Nguyen TB. Synthesis of Thioureas, Thioamides, and Aza-Heterocycles via Dimethyl-Sulfoxide-Promoted Oxidative Condensation of Sulfur, Malonic Acids, and Amines. Org Lett 2023; 25:6322-6327. [PMID: 37606344 DOI: 10.1021/acs.orglett.3c02247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Malonic acid and derivatives have been well-known to undergo monodecarboxylation under relatively mild conditions and have been exclusively used as a C2 synthon. We report herein their new application as a C1 synthon via double decarboxylation promoted by sulfur and dimethyl sulfoxide. In the presence of amines as nucleophiles, a wide range of thioureas and thioamides as well as N-heterocycles were obtained in good to excellent yields under mild heating conditions.
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Affiliation(s)
- Trung Hieu Do
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Supasorn Phaenok
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Tina Modjinou
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Daniel Grande
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Thi Thanh Tam Nguyen
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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15
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Le DC, Vu TB, Tran TN, Nguyen TL, Nguyen TB, Nguyen DC, Hoang VT. The Effectiveness of Lifestyle Changes in Glycemic Control among Pregnant Women with Gestational Diabetes Mellitus. Medicina (Kaunas) 2023; 59:1587. [PMID: 37763706 PMCID: PMC10537217 DOI: 10.3390/medicina59091587] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/26/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023]
Abstract
Background and Objectives: Gestational diabetes mellitus (GDM) is a type of diabetes that develops during pregnancy and affects approximately 10% of pregnant women worldwide. Understanding the impact of lifestyle changes on glycemic control in GDM is important for improving maternal and fetal outcomes and reducing the risk of diabetes in both the mother and child. The aim of this study is to evaluate the effectiveness as well as the factors affecting glycemic control by lifestyle changes in pregnant women with GDM. Materials and Methods: A descriptive cross-sectional study was conducted at three hospitals in the Thai Binh Province from June 2021 to May 2022. All pregnant women at 24-28 weeks of gestation, aged 18 years or older, were enrolled. GDM was diagnosed according to the guidelines of the International Association of the Diabetes and Pregnancy Study Groups. Lifestyle changes including diet and physical exercise were carried out for two weeks. The main outcome measured was successful glycemic control according to the 2018 ADA Recommendations for the Management and Treatment of GDM. Results: 1035 women were included and 20.2% diagnosed with GDM. After two weeks of lifestyle change intervention, 82.6% of the pregnant women with GDM had successful glycemic control. Pregnant women aged under 35 years had a 3.2 times higher rate of gestational glycemic control than those older than 35 (aOR = 3.22, p-value = 0.004). Women with a pre-pregnancy BMI of less than 25 had a higher rate of gestational glycemic control than those with a BMI of over 25 (aOR = 10.84, p-value < 0.001). Compared to women who had all three diagnostic criteria for gestational diabetes, those with two diagnostic criteria and one criterion were 3.8 times and 3 times more likely to have successful blood sugar control (aOR = 3.78, p-value = 0.01 and aOR = 3.03, p-value = 0.03, respectively). Conclusion: Lifestyle changes can be an effective measure for achieving glycemic control in women with GDM. Healthcare providers should consider individualized treatment plans based on the specific needs of each patient.
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Affiliation(s)
| | | | | | | | | | | | - Van Thuan Hoang
- Thai Binh University of Medicine and Pharmacy, Thai Binh 410000, Vietnam; (D.C.L.); (T.B.V.); (T.N.T.); (T.L.N.); (T.B.N.); (D.C.N.)
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16
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Nguyen BN, Tran MH, Bui TTT, Mac DH, Pham VP, Retailleau P, Nguyen TB. Sulfur-Promoted Oxidative Condensation of Chalcones with Unsubstituted Cyanoacetamide in DMSO: Access to 3-Cyanopyrid-2-ones. J Org Chem 2023. [PMID: 37470501 DOI: 10.1021/acs.joc.3c01207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
Elemental sulfur and DABCO were found to be an excellent combination to promote a one-pot cascade of condensation-oxidative cyclization of chalcones and unsubstituted cyanoacetamide in DMSO to provide 3-cyanopyrid-2-ones.
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Affiliation(s)
- Bich Ngoc Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam
| | - Minh Hieu Tran
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam
| | - Thai Thanh Thu Bui
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam
| | - Dinh Hung Mac
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam
| | - Van Phong Pham
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Av de la Terrasse, Gif-sur-Yvette 91198, France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, Av de la Terrasse, Gif-sur-Yvette 91198, France
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17
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Nguyen LA, Phaenok S, Le DL, Nguyen TTT, Ngo QA, Nguyen TB. Fe/S-Catalyzed Redox Condensation of o-Nitrophenols with Isothiocyanates to 2-Aminobenzoxazoles. Org Lett 2023. [PMID: 37393601 DOI: 10.1021/acs.orglett.3c01897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
As frequently encountered byproducts of isocyanate chemistry, hydrogen sulfide and related sulfur containing compounds should be treated in a safe way to lower their adverse health and environmental effects, especially in large scale syntheses. As a proof of concept, we report herein an example of in situ recycling of sulfur byproduct to reductant in the synthesis of bioactive 2-aminobenzoxazoles 3. Using an Fe/S catalytic system, this heterocyclic scaffold could be obtained from o-nitrophenols 1 with isothiocyates 2 via direct redox condensation consisting of reduction of the nitro group of 1 by the sulfur moiety of 2.
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Affiliation(s)
- Le Anh Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Supasorn Phaenok
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Duc Long Le
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Thi Thu Tram Nguyen
- Department of Chemistry, Faculty of Basic Science, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - Quoc Anh Ngo
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
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18
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Nguyen TB, de Sá AGC, Rodrigues CHM, Pires DEV, Ascher DB. LEGO-CSM: a tool for functional characterisation of proteins. Bioinformatics 2023:btad402. [PMID: 37382560 DOI: 10.1093/bioinformatics/btad402] [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] [Received: 09/05/2022] [Revised: 02/22/2023] [Accepted: 06/27/2023] [Indexed: 06/30/2023]
Abstract
MOTIVATION With the development of sequencing techniques, the discovery of new proteins significantly exceeds the human capacity and resources for experimentally characterising protein functions. LEGO-CSM is a comprehensive web-based resource that fills this gap by leveraging the well-established and robust graph-based signatures to supervised learning models using both protein sequence and structure information to accurately model protein function in terms of Subcellular Localisation, Enzyme Commission (EC) numbers and Gene Ontology (GO) terms. RESULTS We show our models perform as well as or better than alternative approaches, achieving Area Under the Receiver Operating Characteristic Curve (ROC AUC) of up to 0.93 for subcellular localisation, up to 0.93 for EC and up to 0.81 for GO terms on independent blind tests. AVAILABILITY LEGO-CSM's web server is freely available at https://biosig.lab.uq.edu.au/lego_csm. In addition, all datasets used to train and test LEGO-CSM's models can be downloaded at https://biosig.lab.uq.edu.au/lego_csm/data. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Thanh Binh Nguyen
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, Parkville, Victoria 3052, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
| | - Alex G C de Sá
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, Parkville, Victoria 3052, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
- Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Carlos H M Rodrigues
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, Parkville, Victoria 3052, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
| | - Douglas E V Pires
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, Parkville, Victoria 3052, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
- School of Computing and Information Systems, University of Melbourne, Parkville, Victoria 3052, Australia
| | - David B Ascher
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, Parkville, Victoria 3052, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
- Baker Department of Cardiometabolic Health, University of Melbourne, Parkville, Victoria 3010, Australia
- School of Computing and Information Systems, University of Melbourne, Parkville, Victoria 3052, Australia
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Puac-Polanco P, Zakhari N, Miller J, McComiskey D, Thornhill RE, Jansen GH, Nair VJ, Nguyen TB. Diagnostic Accuracy of Centrally Restricted Diffusion Sign in Cerebral Metastatic Disease: Differentiating Radiation Necrosis from Tumor Recurrence. Can Assoc Radiol J 2023; 74:100-109. [PMID: 35848632 DOI: 10.1177/08465371221115341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Purpose: The centrally restricted diffusion sign of diffusion-weighted imaging (DWI) is associated with radiation necrosis (RN) in treated gliomas. Our goal was to evaluate its diagnostic accuracy to distinguish RN from tumor recurrence (TR) in treated brain metastases. Methods: Retrospective study of consecutive patients with brain metastases who developed a newly centrally necrotic lesion after radiotherapy (RT). One reader placed regions of interest (ROI) in the enhancing solid lesion and the non-enhancing central necrosis on the apparent diffusion coefficient (ADC) map. Two readers qualitatively assessed the presence of the centrally restricted diffusion sign. The final diagnosis was made by histopathology (n = 39) or imaging follow-up (n = 2). Differences between groups were assessed by Fisher's exact or Mann-Whitney U tests. Diagnostic accuracy and inter-reader agreement were evaluated using receiver operating characteristic (ROC) curve analysis and kappa scores. Results: Forty-one lesions (32 predominant RN; 9 predominant TR) were analyzed. An ADC value ≤ 1220 × 10-6 mm2/s (sensitivity 74%, specificity 89%, area under the curve [AUC] .85 [95% confidence interval {CI}, .70-.94] P < .0001) from the necrosis and an ADC necrosis/enhancement ratio ≤1.37 (sensitivity 74%, specificity 89%, AUC .82 [95% CI, .67-.93] P < .0001) provided the highest performance for RN diagnosis. The qualitative centrally restricted diffusion sign had a sensitivity of 69% (95% CI, .50-.83), specificity of 77% (95% CI, .40-.96), and a moderate (k = .49) inter-reader agreement for RN diagnosis. Conclusions: Radiation necrosis is associated with lower ADC values in the central necrosis than TR. A moderate interobserver agreement might limit the qualitative assessment of the centrally restricted diffusion sign.
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Affiliation(s)
- Paulo Puac-Polanco
- Department of Radiology, Radiation Oncology and Medical Physics, 6363University of Ottawa, Ottawa, ON, Canada
| | - Nader Zakhari
- Department of Radiology, Radiation Oncology and Medical Physics, 6363University of Ottawa, Ottawa, ON, Canada
| | - Jacob Miller
- Department of Radiology, Radiation Oncology and Medical Physics, 6363University of Ottawa, Ottawa, ON, Canada
| | - David McComiskey
- Department of Radiology, Radiation Oncology and Medical Physics, 6363University of Ottawa, Ottawa, ON, Canada
| | - Rebecca E Thornhill
- Department of Radiology, Radiation Oncology and Medical Physics, 6363University of Ottawa, Ottawa, ON, Canada
| | - Gerard H Jansen
- Department of Pathology and Laboratory Medicine, The Ottawa Hospital, 6363University of Ottawa, Ottawa, ON, Canada
| | - Vimoj J Nair
- Department of Radiology, Radiation Oncology and Medical Physics, 6363University of Ottawa, Ottawa, ON, Canada.,The Ottawa Hospital Research Institute (OHRI)
| | - Thanh Binh Nguyen
- Department of Radiology, Radiation Oncology and Medical Physics, 6363University of Ottawa, Ottawa, ON, Canada.,The Ottawa Hospital Research Institute (OHRI)
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20
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Nguyen TB, Zakhari N, Velasco Sandoval S, Guarnizo-Capera A, Alexios Gulak M, Woulfe J, Jansen G, Thornhill R, Majtenyi N, Cron GO. Diagnostic Accuracy of Arterial Spin-Labeling, Dynamic Contrast-Enhanced, and DSC Perfusion Imaging in the Diagnosis of Recurrent High-Grade Gliomas: A Prospective Study. AJNR Am J Neuroradiol 2023; 44:134-142. [PMID: 36702501 PMCID: PMC9891339 DOI: 10.3174/ajnr.a7771] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 12/30/2022] [Indexed: 01/27/2023]
Abstract
BACKGROUND AND PURPOSE For patients with high-grade gliomas, the appearance of a new, enhancing lesion after surgery and chemoradiation represents a diagnostic dilemma. We hypothesized that MR perfusion without and with contrast can differentiate tumor recurrence from radiation necrosis. MATERIALS AND METHODS In this prospective study, we performed 3 MR perfusion methods: arterial spin-labeling, DSC, and dynamic contrast enhancement. For each lesion, we measured CBF from arterial spin-labeling, uncorrected relative CBV, and leakage-corrected relative CBV from DSC imaging. The volume transfer constant and plasma volume were obtained from dynamic contrast-enhanced imaging without and with T1 mapping using modified Look-Locker inversion recovery (MOLLI). The diagnosis of tumor recurrence or radiation necrosis was determined by either histopathology for patients who underwent re-resection or radiologic follow-up for patients who did not have re-resection. RESULTS There were 26 patients with 32 lesions, 19 lesions with tumor recurrence and 13 lesions with radiation necrosis. Compared with radiation necrosis, lesions with tumor recurrence had higher CBF (P = .033), leakage-corrected relative CBV (P = .048), and plasma volume using MOLLI T1 mapping (P = .012). For differentiating tumor recurrence from radiation necrosis, the areas under the curve were 0.81 for CBF, 0.80 for plasma volume using MOLLI T1 mapping, and 0.71 for leakage-corrected relative CBV. A correlation was found between CBF and leakage-corrected relative CBV (r s = 0.54), volume transfer constant, and plasma volume (0.50 < r s< 0.77) but not with uncorrected relative CBV (r s = 0.20, P = .29). CONCLUSIONS In the differentiation of tumor recurrence from radiation necrosis in a newly enhancing lesion, the diagnostic value of arterial spin-labeling-derived CBF is similar to that of DSC and dynamic contrast-enhancement-derived blood volume.
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Affiliation(s)
- T B Nguyen
- From the Department of Radiology (T.B.N., N.Z., R.T.), Radiation Oncology and Medical Physics
- University of Ottawa (T.B.N., N.Z., J.W., G.J., R.T.), Ottawa, Ontario, Canada
- The Ottawa Hospital Research Institute (T.B.N., J.W., G.J., R.T.), Ottawa, Ontario, Canada
| | - N Zakhari
- From the Department of Radiology (T.B.N., N.Z., R.T.), Radiation Oncology and Medical Physics
- University of Ottawa (T.B.N., N.Z., J.W., G.J., R.T.), Ottawa, Ontario, Canada
| | - S Velasco Sandoval
- Division of Neuroradiology (S.V.S., A.G.-C.), Department of Radiology, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, D.C., Colombia
| | - A Guarnizo-Capera
- Division of Neuroradiology (S.V.S., A.G.-C.), Department of Radiology, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, D.C., Colombia
| | - M Alexios Gulak
- Department of Anesthesiology and Pain Medicine (M.A.G.), University of Toronto, Toronto, Ontario, Canada
| | - J Woulfe
- Department of Pathology and Laboratory Medicine (J.W., G.J.), The Ottawa Hospital, Ottawa, Ontario, Canada
- University of Ottawa (T.B.N., N.Z., J.W., G.J., R.T.), Ottawa, Ontario, Canada
- The Ottawa Hospital Research Institute (T.B.N., J.W., G.J., R.T.), Ottawa, Ontario, Canada
| | - G Jansen
- Department of Pathology and Laboratory Medicine (J.W., G.J.), The Ottawa Hospital, Ottawa, Ontario, Canada
- University of Ottawa (T.B.N., N.Z., J.W., G.J., R.T.), Ottawa, Ontario, Canada
- The Ottawa Hospital Research Institute (T.B.N., J.W., G.J., R.T.), Ottawa, Ontario, Canada
| | - R Thornhill
- From the Department of Radiology (T.B.N., N.Z., R.T.), Radiation Oncology and Medical Physics
- University of Ottawa (T.B.N., N.Z., J.W., G.J., R.T.), Ottawa, Ontario, Canada
- The Ottawa Hospital Research Institute (T.B.N., J.W., G.J., R.T.), Ottawa, Ontario, Canada
| | - N Majtenyi
- Department of Medical Physics (N.M.), Grand River Regional Cancer Centre, Kitchener, Ontario, Canada
| | - G O Cron
- Stanford University (G.O.C.), Stanford, California
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21
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Nguyen HY, Tran TMC, Nguyen VH, Retailleau P, Mac DH, Nguyen TB. Reaction of 1-acetonaphthones with anilines and elemental sulfur: rapid construction of 1-anilinonaphtho[2,1- b]thiophenes. Org Biomol Chem 2023; 21:503-507. [PMID: 36519810 DOI: 10.1039/d2ob01898e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
1-Anilinonaphtho[2,1-b]thiophenes could be conveniently synthesized from a three-component reaction of 1-acetonaphthones with anilines and elemental sulfur under catalyst-free simple heating conditions.
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Affiliation(s)
- Hoang Yen Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam.
| | - Thi Minh Chau Tran
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam.
| | - Van Ha Nguyen
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam.
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
| | - Dinh Hung Mac
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam.
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
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22
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Nguyen TB, Nguyen TTN, Dang TH, Nguyen BN, Truong TMH, Le TH, Le ND. Clinical characteristics and Laboratory tests in full-term Neonates with Sepsis in Vietnam National Children's Hospital. Russian Journal of Infection and Immunity 2023. [DOI: 10.15789/2220-7619-cca-1861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
ABSTRACT
Background: Sepsis is a life-threatening condition responding to an infectious agent causes damage to organs. Sepsis causes serious consequences in neonates due to high rates of mortality and sequelae and disability. Vietnam is a country in Southeast Asia, where the rate of infectious diseases is high in the world with high rates of infection, disability and mortality, as well as a middle-income country with a stratification health care system.
Aim: Evaluate the clinical and laboratory characteristics of patients at the Vietnam National Childrens Hospital.
Material and methods: A descriptive study was conducted on 85 full-term infants admitted to Vietnam National Children's Hospital in the period from 12/2019 to 4/2021.
Results: Common clinical symptoms in neonates with sepsis included poor feeding (89.4 %), respiratory failure (69.4 %), fever (51.8 %), tachycardia (52.8 %), shock (25 %). Anemic patients account for a high rate (72.9 %). Patients with increased white blood count accounted for 41.2 %, newborns with low white blood count accounted for 15.4 %. There were 49.6 % patients with low thrombocytopenia. Most patients had elevated CRP (88.3%). The mean value of nCD64 was 10167.1 6136.9 molecules bound/cell, mHLA-DR was 9898.4 14173.9 molecules bound/cell, Sepsis Index was 274.6 287.5.
Conclusions: We recorded differences in clinical characteristics and Laboratory tests in full-term Neonates with Sepsis in National Children's Hospital. Of which, nCD64, mHLA-DR and Sepsis Index should be further investigated and referred as a prospective routine biomarker in diagnosis of neonatal sepsis.
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23
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Zhou Y, Al‐Jarf R, Alavi A, Nguyen TB, Rodrigues CHM, Pires DEV, Ascher DB. kinCSM: Using graph-based signatures to predict small molecule CDK2 inhibitors. Protein Sci 2022; 31:e4453. [PMID: 36305769 PMCID: PMC9597374 DOI: 10.1002/pro.4453] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 07/31/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 11/20/2022]
Abstract
Protein phosphorylation acts as an essential on/off switch in many cellular signaling pathways. This has led to ongoing interest in targeting kinases for therapeutic intervention. Computer‐aided drug discovery has been proven a useful and cost‐effective approach for facilitating prioritization and enrichment of screening libraries, but limited effort has been devoted providing insights on what makes a potent kinase inhibitor. To fill this gap, here we developed kinCSM, an integrative computational tool capable of accurately identifying potent cyclin‐dependent kinase 2 (CDK2) inhibitors, quantitatively predicting CDK2 ligand–kinase inhibition constants (pKi) and classifying different types of inhibitors based on their favorable binding modes. kinCSM predictive models were built using supervised learning and leveraged the concept of graph‐based signatures to capture both physicochemical properties and geometry properties of small molecules. CDK2 inhibitors were accurately identified with Matthew's Correlation Coefficients (MCC) of up to 0.74, and inhibition constants predicted with Pearson's correlation of up to 0.76, both with consistent performances of 0.66 and 0.68 on a nonredundant blind test, respectively. kinCSM was also able to identify the potential type of inhibition for a given molecule, achieving MCC of up to 0.80 on cross‐validation and 0.73 on the blind test. Analyzing the molecular composition of revealed enriched chemical fragments in CDK2 inhibitors and different types of inhibitors, which provides insights into the molecular mechanisms behind ligand–kinase interactions. kinCSM will be an invaluable tool to guide future kinase drug discovery. To aid the fast and accurate screening of CDK2 inhibitors, kinCSM is freely available at https://biosig.lab.uq.edu.au/kin_csm/.
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Affiliation(s)
- Yunzhuo Zhou
- School of Chemistry and Molecular BiosciencesUniversity of QueenslandBrisbaneQueenslandAustralia,Structural Biology and Bioinformatics, Department of BiochemistryUniversity of MelbourneMelbourneVictoriaAustralia,Systems and Computational Biology, Bio21 InstituteUniversity of MelbourneMelbourneVictoriaAustralia,Computational Biology and Clinical InformaticsBaker Heart and Diabetes InstituteMelbourneVictoriaAustralia
| | - Raghad Al‐Jarf
- Structural Biology and Bioinformatics, Department of BiochemistryUniversity of MelbourneMelbourneVictoriaAustralia,Systems and Computational Biology, Bio21 InstituteUniversity of MelbourneMelbourneVictoriaAustralia,Computational Biology and Clinical InformaticsBaker Heart and Diabetes InstituteMelbourneVictoriaAustralia
| | - Azadeh Alavi
- Structural Biology and Bioinformatics, Department of BiochemistryUniversity of MelbourneMelbourneVictoriaAustralia,Systems and Computational Biology, Bio21 InstituteUniversity of MelbourneMelbourneVictoriaAustralia,Computational Biology and Clinical InformaticsBaker Heart and Diabetes InstituteMelbourneVictoriaAustralia
| | - Thanh Binh Nguyen
- School of Chemistry and Molecular BiosciencesUniversity of QueenslandBrisbaneQueenslandAustralia,Structural Biology and Bioinformatics, Department of BiochemistryUniversity of MelbourneMelbourneVictoriaAustralia,Systems and Computational Biology, Bio21 InstituteUniversity of MelbourneMelbourneVictoriaAustralia,Computational Biology and Clinical InformaticsBaker Heart and Diabetes InstituteMelbourneVictoriaAustralia
| | - Carlos H. M. Rodrigues
- School of Chemistry and Molecular BiosciencesUniversity of QueenslandBrisbaneQueenslandAustralia,Structural Biology and Bioinformatics, Department of BiochemistryUniversity of MelbourneMelbourneVictoriaAustralia,Systems and Computational Biology, Bio21 InstituteUniversity of MelbourneMelbourneVictoriaAustralia,Computational Biology and Clinical InformaticsBaker Heart and Diabetes InstituteMelbourneVictoriaAustralia
| | - Douglas E. V. Pires
- School of Chemistry and Molecular BiosciencesUniversity of QueenslandBrisbaneQueenslandAustralia,Structural Biology and Bioinformatics, Department of BiochemistryUniversity of MelbourneMelbourneVictoriaAustralia,Systems and Computational Biology, Bio21 InstituteUniversity of MelbourneMelbourneVictoriaAustralia,Computational Biology and Clinical InformaticsBaker Heart and Diabetes InstituteMelbourneVictoriaAustralia,School of Computing and Information SystemsUniversity of MelbourneMelbourneVictoriaAustralia
| | - David B. Ascher
- School of Chemistry and Molecular BiosciencesUniversity of QueenslandBrisbaneQueenslandAustralia,Structural Biology and Bioinformatics, Department of BiochemistryUniversity of MelbourneMelbourneVictoriaAustralia,Systems and Computational Biology, Bio21 InstituteUniversity of MelbourneMelbourneVictoriaAustralia,Computational Biology and Clinical InformaticsBaker Heart and Diabetes InstituteMelbourneVictoriaAustralia
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24
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Nguyen TQN, Tran TTT, Mai VXH, Nguyen TB, Ton NMN, Le VVM. Corncob powder and transglutaminase addition in pasta: Effects on proximate composition, physical and cooking properties, and overall acceptability of the product. Cereal Chem 2022. [DOI: 10.1002/cche.10615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Thi Quynh Ngoc Nguyen
- Department of Food TechnologyHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet street, District 10Ho Chi Minh CityVietnam
- Vietnam National University – Ho Chi Minh City (VNU‐HCM)Linh Trung Ward, Thu DucHo Chi Minh CityVietnam
| | - Thi Thu Tra Tran
- Department of Food TechnologyHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet street, District 10Ho Chi Minh CityVietnam
- Vietnam National University – Ho Chi Minh City (VNU‐HCM)Linh Trung Ward, Thu DucHo Chi Minh CityVietnam
| | - Van Xuan Hoang Mai
- Department of Food TechnologyHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet street, District 10Ho Chi Minh CityVietnam
- Vietnam National University – Ho Chi Minh City (VNU‐HCM)Linh Trung Ward, Thu DucHo Chi Minh CityVietnam
| | - Thanh Binh Nguyen
- Department of Food TechnologyHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet street, District 10Ho Chi Minh CityVietnam
- Vietnam National University – Ho Chi Minh City (VNU‐HCM)Linh Trung Ward, Thu DucHo Chi Minh CityVietnam
| | - Nu Minh Nguyet Ton
- Department of Food TechnologyHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet street, District 10Ho Chi Minh CityVietnam
- Vietnam National University – Ho Chi Minh City (VNU‐HCM)Linh Trung Ward, Thu DucHo Chi Minh CityVietnam
| | - Van Viet Man Le
- Department of Food TechnologyHo Chi Minh City University of Technology (HCMUT)268 Ly Thuong Kiet street, District 10Ho Chi Minh CityVietnam
- Vietnam National University – Ho Chi Minh City (VNU‐HCM)Linh Trung Ward, Thu DucHo Chi Minh CityVietnam
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25
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Nguyen TB, Mac DH, Tran TMC, Nguyen BN, Cao HT. Base-catalyzed multicomponent access to quinoxalin-2-thiones from o-phenylenediamines, aryl ketones and sulfur. Org Biomol Chem 2022; 20:7226-7231. [PMID: 36053547 DOI: 10.1039/d2ob01343f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3-Arylquinoxaline-2-thiones were conveniently synthesized via three-component oxidative condensation of acetophenones with o-phenylenediamines and sulfur in DMSO in the presence of piperidine as a catalyst. The products could be readily isolated from the reaction mixture by simple precipitation and washing with methanol. This set of reaction conditions applied to higher homologs of acetophenones as well as benzyl phenyl ketones led to 2,3-di-C-substituted quinoxalines. Further functionalization of 3-phenylquinoxaline-2-thione via reaction on the thione group could be readily performed to provide quinoxaline derivatives in good yields.
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Affiliation(s)
- Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
| | - Dinh Hung Mac
- Faculty of chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam.
| | - Thi Minh Chau Tran
- Faculty of chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam.
| | - Bich Ngoc Nguyen
- Faculty of chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi, Viet Nam. .,Le Quy Don Technical University, 236 Hoang Quoc Viet, Ha Noi, Vietnam
| | - Hai Thuong Cao
- Le Quy Don Technical University, 236 Hoang Quoc Viet, Ha Noi, Vietnam
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26
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Nguyen TB, Retailleau P. DABCO-Catalyzed Reaction of 2-Naphthols with Aryl Isothiocyanates: Access to 2-Iminonaphtho-1,3-oxathioles. Org Lett 2022; 24:6676-6680. [PMID: 36048584 DOI: 10.1021/acs.orglett.2c02736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2-Naphthols 1 were found to react with aryl isothiocyanates 2 to provide 2-iminonaphtho-1,3-oxathioles 3 in the presence of DABCO as a catalyst. When elemental sulfur was used, moderate to good yields of 3 could be achieved from a nearly equimolar mixture of two starting materials 1 and 2. Products 3 could also be formed in the absence of sulfur or an external oxidant. In the latter case, an additional equivalent of 2 was found to act as a dehydrogenating agent.
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Affiliation(s)
- Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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27
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Ngo HL, Bui TH, Van Thuan D, Pham HP, Cao XT, Sharma AK, Nguyen TB, Le CL, Anh TH, Hoang SMT, Anh TDT, Quang QK, Nguyen TT, Chung NTK. Polydopamine-modified MWCNT/graphene oxide hybrid 3D carbon nano-structure for flexible symmetric supercapacitor electrodes. Appl Nanosci 2022. [DOI: 10.1007/s13204-022-02585-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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28
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Nguyen DC, Dao TL, Truong TMD, Nguyen TH, Phan TN, Nguyen HM, Pham TD, Nguyen XB, Nguyen TB, Hoang VT. Short-Term Adverse Effects Immediately after the Start of COVID-19 Booster Vaccination in Vietnam. Vaccines (Basel) 2022; 10:vaccines10081325. [PMID: 36016213 PMCID: PMC9414515 DOI: 10.3390/vaccines10081325] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 12/20/2022] Open
Abstract
Background: Risk communication is necessary to improve the booster vaccination rate, but Vietnam does not have a system to collect and disclose such information. Therefore, the purpose of this study was to clarify adverse reactions and their frequency in the early period after booster vaccination, and to obtain primary data for improving the booster vaccination rate. Methods: A cross-sectional survey was conducted among adults aged ≥18 years. Clinical data were collected 14 days after booster vaccination by using a standard questionnaire. Results: A total of 1322 participants were included with median age = 23 and sex ratio (Male/Female) = 0.53. AstraZeneca was the most commonly used vaccine for the first and second doses, while Pfizer was the most commonly used vaccine for booster shots. Injection site pain, fatigue, and myalgia were the most common side effect reported (71.9%, 28.1%, and 21.8%, respectively). Compared to previous COVID-19 vaccine injections, 81.9% of participants reported that their symptoms were similar or milder after receiving the booster dose. They were more likely to present injection site pain (OR = 1.43, p < 0.0001) and lymphadenopathy (OR = 4.76, p < 0.0001) after receiving the booster shot. Fever (OR = 0.33, p < 0.0001) and fatigue (OR = 0.77, p = 0.002) were less often reported after booster shots compared to the first and second injections. The severity of symptoms occurring after booster dose versus first and second doses increased significantly with each additional year of age and among participants receiving the Pfizer and Moderna vaccines. Conclusion: Adverse reactions to booster vaccination are minor and their incidence is the same as for the first or the second vaccination. Multicenter studies with larger sample sizes on the side effects and safety of COVID-19 vaccine booster shots need to be conducted to make the population less worried, in order to increase the vaccination rate, to protect individuals’ and communities’ health.
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29
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Nguyen LA, Nguyen TTT, Ngo QA, Nguyen TB. Sulfur‐Catalyzed Oxidative Condensation of Aryl Alkyl Ketones with o‐Phenylenediamines: Access to Quinoxalines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Quoc Anh Ngo
- Vietnam Academy of Science and Technology VIET NAM
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30
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Hoang VT, Pham TD, Nguyen QT, Nguyen DC, Nguyen DT, Nguyen TB, Tran TKT, Phan TL, Vo PLN, Dao TL, Fenollar F, Gautret P. Seroprevalence of SARS-CoV-2 among high-density communities and hyper-endemicity of COVID-19 in Vietnam. Trop Med Int Health 2022; 27:515-521. [PMID: 35303386 PMCID: PMC9115418 DOI: 10.1111/tmi.13744] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To assess the magnitude of active and recovering COVID-19 patients among at-risk communities and to identify the factors associated with positive serology. METHODS Four hundred and eighty-three close contacts of COVID-19 patients residing in Ho Chi Minh City, Vietnam, during the fourth wave of the COVID-19 epidemic (September and October 2021) were included. Five weeks after exposure to a COVID-19 patient, they underwent a serology test using the BIOSYNEX COVID-19 BSS kit. RESULTS The median age of participants was 37 years. A total of 34.6% individuals presented at least one clinical symptom between the time of contact with the COVID-19 patient and inclusion in study. A total of 1.7% unvaccinated individuals tested positive for SARS-CoV-2 using real-time PCR, and 9.5% had evidence of recent infection (positive PCR and/or IgM). A further 26.7% unvaccinated individuals presented evidence of a past infection (positive IgG only). Socio-demographic characteristics, vaccination status and clinical symptoms were not associated with a positive IgM test. CONCLUSION This is the first serosurvey conducted during the fourth wave of the epidemic in Vietnam. It revealed a seropositivity rate higher than in previous studies and confirmed the hyperendemicity of SARS-CoV-2. Testing using rapid serological tests proved to be a reliable, easy-to-use method and enabled a rapid estimation of the burden of COVID-19.
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Affiliation(s)
- Van Thuan Hoang
- Thai Binh University of Medicine and PharmacyThai BinhVietnam
| | - Thi Dung Pham
- Thai Binh University of Medicine and PharmacyThai BinhVietnam
| | | | | | | | | | | | - Trong Lan Phan
- General Department of Preventive MedicineMinistry of HealthHa NoiVietnam
| | | | - Thi Loi Dao
- Thai Binh University of Medicine and PharmacyThai BinhVietnam
| | - Florence Fenollar
- Aix Marseille UnivIRDAP‐HMSSA, VITROMEMarseilleFrance
- IHU‐Méditerranée InfectionMarseilleFrance
| | - Philippe Gautret
- Aix Marseille UnivIRDAP‐HMSSA, VITROMEMarseilleFrance
- IHU‐Méditerranée InfectionMarseilleFrance
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31
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Stephenson SE, Costain G, Blok LE, Silk MA, Nguyen TB, Dong X, Alhuzaimi DE, Dowling JJ, Walker S, Amburgey K, Hayeems RZ, Rodan LH, Schwartz MA, Picker J, Lynch SA, Gupta A, Rasmussen KJ, Schimmenti LA, Klee EW, Niu Z, Agre KE, Chilton I, Chung WK, Revah-Politi A, Au PB, Griffith C, Racobaldo M, Raas-Rothschild A, Ben Zeev B, Barel O, Moutton S, Morice-Picard F, Carmignac V, Cornaton J, Marle N, Devinsky O, Stimach C, Wechsler SB, Hainline BE, Sapp K, Willems M, Bruel AL, Dias KR, Evans CA, Roscioli T, Sachdev R, Temple SE, Zhu Y, Baker JJ, Scheffer IE, Gardiner FJ, Schneider AL, Muir AM, Mefford HC, Crunk A, Heise EM, Millan F, Monaghan KG, Person R, Rhodes L, Richards S, Wentzensen IM, Cogné B, Isidor B, Nizon M, Vincent M, Besnard T, Piton A, Marcelis C, Kato K, Koyama N, Ogi T, Goh ESY, Richmond C, Amor DJ, Boyce JO, Morgan AT, Hildebrand MS, Kaspi A, Bahlo M, Friðriksdóttir R, Katrínardóttir H, Sulem P, Stefánsson K, Björnsson HT, Mandelstam S, Morleo M, Mariani M, Scala M, Accogli A, Torella A, Capra V, Wallis M, Jansen S, Waisfisz Q, de Haan H, Sadedin S, Lim SC, White SM, Ascher DB, Schenck A, Lockhart PJ, Christodoulou J, Tan TY, Christodoulou J, Tan TY. Germline variants in tumor suppressor FBXW7 lead to impaired ubiquitination and a neurodevelopmental syndrome. Am J Hum Genet 2022; 109:601-617. [PMID: 35395208 DOI: 10.1016/j.ajhg.2022.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/28/2022] [Indexed: 11/01/2022] Open
Abstract
Neurodevelopmental disorders are highly heterogenous conditions resulting from abnormalities of brain architecture and/or function. FBXW7 (F-box and WD-repeat-domain-containing 7), a recognized developmental regulator and tumor suppressor, has been shown to regulate cell-cycle progression and cell growth and survival by targeting substrates including CYCLIN E1/2 and NOTCH for degradation via the ubiquitin proteasome system. We used a genotype-first approach and global data-sharing platforms to identify 35 individuals harboring de novo and inherited FBXW7 germline monoallelic chromosomal deletions and nonsense, frameshift, splice-site, and missense variants associated with a neurodevelopmental syndrome. The FBXW7 neurodevelopmental syndrome is distinguished by global developmental delay, borderline to severe intellectual disability, hypotonia, and gastrointestinal issues. Brain imaging detailed variable underlying structural abnormalities affecting the cerebellum, corpus collosum, and white matter. A crystal-structure model of FBXW7 predicted that missense variants were clustered at the substrate-binding surface of the WD40 domain and that these might reduce FBXW7 substrate binding affinity. Expression of recombinant FBXW7 missense variants in cultured cells demonstrated impaired CYCLIN E1 and CYCLIN E2 turnover. Pan-neuronal knockdown of the Drosophila ortholog, archipelago, impaired learning and neuronal function. Collectively, the data presented herein provide compelling evidence of an F-Box protein-related, phenotypically variable neurodevelopmental disorder associated with monoallelic variants in FBXW7.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - John Christodoulou
- Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia; Department of Paediatrics, University of Melbourne, Melbourne, VIC 3052, Australia; Victorian Clinical Genetics Services, Melbourne, VIC 3052, Australia
| | - Tiong Yang Tan
- Murdoch Children's Research Institute, Melbourne, VIC 3052, Australia; Department of Paediatrics, University of Melbourne, Melbourne, VIC 3052, Australia; Victorian Clinical Genetics Services, Melbourne, VIC 3052, Australia.
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Pan Q, Nguyen TB, Ascher DB, Pires DEV. Systematic evaluation of computational tools to predict the effects of mutations on protein stability in the absence of experimental structures. Brief Bioinform 2022; 23:bbac025. [PMID: 35189634 PMCID: PMC9155634 DOI: 10.1093/bib/bbac025] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 01/13/2022] [Accepted: 01/30/2022] [Indexed: 12/26/2022] Open
Abstract
Changes in protein sequence can have dramatic effects on how proteins fold, their stability and dynamics. Over the last 20 years, pioneering methods have been developed to try to estimate the effects of missense mutations on protein stability, leveraging growing availability of protein 3D structures. These, however, have been developed and validated using experimentally derived structures and biophysical measurements. A large proportion of protein structures remain to be experimentally elucidated and, while many studies have based their conclusions on predictions made using homology models, there has been no systematic evaluation of the reliability of these tools in the absence of experimental structural data. We have, therefore, systematically investigated the performance and robustness of ten widely used structural methods when presented with homology models built using templates at a range of sequence identity levels (from 15% to 95%) and contrasted performance with sequence-based tools, as a baseline. We found there is indeed performance deterioration on homology models built using templates with sequence identity below 40%, where sequence-based tools might become preferable. This was most marked for mutations in solvent exposed residues and stabilizing mutations. As structure prediction tools improve, the reliability of these predictors is expected to follow, however we strongly suggest that these factors should be taken into consideration when interpreting results from structure-based predictors of mutation effects on protein stability.
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Affiliation(s)
- Qisheng Pan
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3052, Australia
| | - Thanh Binh Nguyen
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3052, Australia
| | - David B Ascher
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3052, Australia
- Department of Biochemistry, University of Cambridge, 80 Tennis Ct Rd, Cambridge CB2 1GA, UK
| | - Douglas E V Pires
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane City, Queensland 4072, Australia
- Systems and Computational Biology, Bio21 Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3052, Australia
- School of Computing and Information Systems, University of Melbourne, Melbourne, Victoria 3053, Australia
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Luu T, Verhallen M, Tran DD, Sea WB, Nguyen TB, Nguyen HQ. Statistically examining the connection between dike development and human perceptions in the floodplains' socio-hydrology system of Vietnamese Mekong Delta. Sci Total Environ 2022; 810:152207. [PMID: 34890660 DOI: 10.1016/j.scitotenv.2021.152207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 11/30/2021] [Accepted: 12/02/2021] [Indexed: 06/13/2023]
Abstract
Efforts on socio-hydrology science have been promoted to solve challenges faced by contemporary water management. This study aims to better understand the co-evolution of human-water systems in floodplains. Specifically, farmers' opinions on flooding, dike effects, and living conditions in different dike systems in the Vietnamese Mekong Delta floodplain are compared to explore possible connections between human perceptions and dike development processes by employing in-depth interviews of 7 officials and oral surveys of 100 farmers supported by a literature review. Local specific contexts have resulted in various dike systems. One mixed-low-dike-dominant, two mixed-high-dike-dominant, and one only-high-dike zones are found in the research area. High dikes have been operating in an ad hoc response to short-term demands in the mixed-dike zones while strictly following a provincial schedule in the only-high-dike zone. The Fisher-Freeman-Halton test was used to compare the farmers' opinions on diverse questions between the zones. Dike development processes are suggested to influence livelihood, transportation, perceived flood peak changes and perceived causes for declining fish stocks. Although it remains challenging to directly attribute these differences to the dike development processes themselves, a new interrelated dike-flood-livelihood feedback loop is proposed for floodplains. Insights obtained are expected to support decision makers formulating tailored climate change adaptation policies to the different socio-hydrological zones. Our findings also contribute to the current understanding of international scientific communities on the human-water system and provide materials to further develop socio-hydrological models that strengthen our predictive capability on how the complex system evolves in floodplains.
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Affiliation(s)
- Tang Luu
- Center of Water Management and Climate Change, Institute for Environment and Resources, Vietnam National University, Ho Chi Minh City (VNU - HCM), Viet Nam.
| | | | - Dung Duc Tran
- Center of Water Management and Climate Change, Institute for Environment and Resources, Vietnam National University, Ho Chi Minh City (VNU - HCM), Viet Nam.
| | - William B Sea
- Center for Sustainability Studies, Bemidji State University, Bemidji, MN, USA.
| | - Thanh Binh Nguyen
- Mekong Delta Development Research Institute, Can Tho University, Viet Nam.
| | - Hong Quan Nguyen
- Center of Water Management and Climate Change, Institute for Environment and Resources, Vietnam National University, Ho Chi Minh City (VNU - HCM), Viet Nam; Institute for Circular Economy Development, VNU - HCM, Viet Nam.
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Vo TT, Cashin A, Superchi C, Tu PHT, Nguyen TB, Boutron I, MacKinnon D, Vanderweele T, Lee H, Vansteelandt S. Quality assessment practice in systematic reviews of mediation studies: results from an overview of systematic reviews. J Clin Epidemiol 2022; 143:137-148. [PMID: 34915117 DOI: 10.1016/j.jclinepi.2021.12.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/28/2021] [Accepted: 12/07/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To describe the bias assessment practice in recently published systematic reviews of mediation studies and to evaluate the quality of different bias assessment tools for mediation analysis proposed in the literature. METHOD We conducted an overview of systematic reviews by searching MEDLINE (OvidSP), PsycINFO (OvidSP), Cochrane Database of Systematic Reviews (OvidSP), and PubMed databases for systematic reviews of mediation studies published from 2007 to 2020. Two reviewers independently screened the title, abstracts, and full texts of the identified reports and extracted the data. The publications of all mediation-specific quality assessment tools used in these reviews were also identified for the evaluation of the tools' development and validation. RESULT Among 103 eligible reviews, 24 (23%) reviews did not assess the risk of bias of eligible studies, and 48 (47%) assessed risk of bias using a tool that was not specifically designed to evaluate mediation analysis. 31 (30.1%) reviews assessed the risk of mediation-specific biases, either narratively or by using specific tools for mediation studies. However, none of these tools were consensus-based, rigorously developed or validated. CONCLUSION The quality assessment practice in recently published systematic reviews of mediation studies is suboptimal. To improve the quality and consistency of risk of bias assessments for mediation studies, a consensus-based bias assessment tool is needed.
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Affiliation(s)
- Tat-Thang Vo
- Department of Statistics and Data Science, The Wharton School, University of Pennsylvania, Philadelphia.
| | - Aidan Cashin
- Centre for Pain IMPACT, Neuroscience Research Australia, Sydney, Australia
| | | | - Pham Hien Trang Tu
- Department of Family Medicine and Population Health, University of Antwerp, Antwerp, Belgium
| | - Thanh Binh Nguyen
- Department of Pharmacy, Vietnam National Cancer Hospital, Hanoi, Vietnam
| | | | | | - Tyler Vanderweele
- Departments of Epidemiology and Biostatistics, Harvard School of Public Health, Harvard University, Boston
| | - Hopin Lee
- Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Stijn Vansteelandt
- Department of Applied Mathematics, Computer Science and Statistics, Faculty of Science, Ghent University, Ghent, Belgium
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Nehru R, Dong CD, Chen CW, Nguyen TB, Li MF. Green and low-cost synthesis of yttrium oxide/graphene oxide binary sheets as a highly efficient electrocatalyst for voltammetric determination of 3-nitro-L-tyrosine. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128089] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Truong TS, Retailleau P, Nguyen TB. TFA/DMSO‐Promoted Cross‐Dehydrogenative Coupling of Hetaryl Thiols with Indoles: Access to 3‐(Hetarylsulfenyl)indole under Mild Conditions. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100751] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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)
- Tan Sang Truong
- Institut de Chimie des Substances Naturelles chemistry FRANCE
| | | | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles Chemistry 1 avenue de la Terrasse 91198 Gif-sur-Yvette FRANCE
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Nguyen TTT, Duong VD, Pham TNN, Duong QT, Nguyen TB. Sulfur–DMSO promoted oxidative coupling of active methylhetarenes with amines: access to amides. Org Biomol Chem 2022; 20:8054-8058. [DOI: 10.1039/d2ob01709a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The sulfur–DMSO couple was found to promote the coupling of active methylhetarenes with amines to yield amides under heating conditions. When 2-methylquinoline was used as the methylhetarene component, the reaction could be catalyzed by Fe, Co and Ni salts.
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Affiliation(s)
- Thi Thu Tram Nguyen
- Faculty of Basic Sciences, Can Tho University of Medicine and Pharmacy, Vietnam
| | - Viet Dung Duong
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Thi Ngoc Nga Pham
- Faculty of Basic Sciences, Can Tho University of Medicine and Pharmacy, Vietnam
| | - Quoc Thanh Duong
- Faculty of Basic Sciences, Can Tho University of Medicine and Pharmacy, Vietnam
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France
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38
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Doan THY, Pham HA, Nguyen NH, Le TD, Nguyen TB, Le TS. Adsorptive Removal of Azo Dye New Coccine Using High-Performance Adsorbent-Based Polycation-Modified Nano-Alpha Alumina Particles. J Anal Methods Chem 2022; 2022:9425334. [PMID: 35178271 PMCID: PMC8844390 DOI: 10.1155/2022/9425334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/06/2022] [Accepted: 01/15/2022] [Indexed: 05/12/2023]
Abstract
The azo dyes new coccine (NCC) were successfully removed through the adsorption onto PVBTAC-modified α-Al2O3 particles. The optimal conditions of both the surface modification by PVBTAC adsorption and the NCC adsorption were thoroughly investigated. Formerly, polycations PVBTAC were adsorbed onto the nanosized α-Al2O3 particles at pH 8, NaCl 100 mM, with a contact time of 2 h, and initial concentration of 1000 ppm to modify the α-Al2O3 surface. Latterly, the NCC adsorptive removal was conducted at pH 8, NaCl 10 mM, α-Al2O3 adsorbent dosage of 3 mg mL-1, and a contact time of 45 min. Interestingly, the optimal pH of 8 potentially applies to treat real wastewater as the environmental pH range is often about 7-8. High removal efficiency and adsorption capacity of the NCC azo dyes were, respectively, found to be approximately 95% and 3.17 mg g-1 with an initial NCC concentration of 10 ppm. The NCC adsorption on the modified α-Al2O3 particles was well fitted with a Freundlich model isotherm. A pseudo-second kinetic was more suitable for the NCC adsorption on the PVBTAC-modified α-Al2O3 surface than a pseudo-first kinetic. The NCC adsorptive removal kinetic was also affirmed by the FT-IR spectra, based especially on the changes of functional group stretch vibrations of -SO3 - group in the NCC molecules and -N+(CH3)3 group in the PVBTAC molecules. The high reusability of the α-Al2O3 particles was proved to be higher than 50% after four generation times.
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Affiliation(s)
- Thi Hai Yen Doan
- Faculty of Chemistry, University of Science, Vietnam National University, Hanoi-19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
| | - Hong Anh Pham
- Nguyen Sieu High School, Yen Hoa, Cau Giay, Hanoi, Vietnam
| | | | - Thi Dung Le
- Faculty of Chemistry, University of Science, Vietnam National University, Hanoi-19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
| | - Thanh Binh Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Hanoi-19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
| | - Thanh Son Le
- Faculty of Chemistry, University of Science, Vietnam National University, Hanoi-19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
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Lai ND, Nguyen TT, Nguyen NNH, Retailleau P, Mac HD, Nguyen TB. Direct Access to 2-Aryl-3-Cyanothiophenes by Base-Catalyzed One-pot Two-step Three-component Reaction of Chalcones with Benzoylacetonitriles and Elemental Sulfur. Org Chem Front 2022. [DOI: 10.1039/d2qo00526c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3-Cyanothiophene is an important heterocyclic scaffold in bioorganic and medicinal chemistry as a useful synthetic intermediate as well as in material sciences as a privilege motif for photovoltaic development. Herein,...
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40
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Nguyen TB, Retailleau P. Direct Access to Thieno[3,4-b]thiophenes via Elemental Sulfur-Promoted Sulfurative Tetramerization of Acetophenones. Chem Commun (Camb) 2022; 58:13333-13336. [DOI: 10.1039/d2cc05539b] [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: 11/09/2022]
Abstract
Thieno[3,4-b]thiophene core could be conveniently obtained via one-pot sulfurative tetramerization of acetophenones using a ternary system comprised of elemental sulfur, base and DMSO under simple heating conditions. The structure of...
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41
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Nguyen TB, Pires DEV, Ascher DB. CSM-carbohydrate: protein-carbohydrate binding affinity prediction and docking scoring function. Brief Bioinform 2021; 23:6457169. [PMID: 34882232 DOI: 10.1093/bib/bbab512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 11/06/2021] [Accepted: 11/08/2021] [Indexed: 12/29/2022] Open
Abstract
Protein-carbohydrate interactions are crucial for many cellular processes but can be challenging to biologically characterise. To improve our understanding and ability to model these molecular interactions, we used a carefully curated set of 370 protein-carbohydrate complexes with experimental structural and biophysical data in order to train and validate a new tool, cutoff scanning matrix (CSM)-carbohydrate, using machine learning algorithms to accurately predict their binding affinity and rank docking poses as a scoring function. Information on both protein and carbohydrate complementarity, in terms of shape and chemistry, was captured using graph-based structural signatures. Across both training and independent test sets, we achieved comparable Pearson's correlations of 0.72 under cross-validation [root mean square error (RMSE) of 1.58 Kcal/mol] and 0.67 on the independent test (RMSE of 1.72 Kcal/mol), providing confidence in the generalisability and robustness of the final model. Similar performance was obtained across mono-, di- and oligosaccharides, further highlighting the applicability of this approach to the study of larger complexes. We show CSM-carbohydrate significantly outperformed previous approaches and have implemented our method and make all data freely available through both a user-friendly web interface and application programming interface, to facilitate programmatic access at http://biosig.unimelb.edu.au/csm_carbohydrate/. We believe CSM-carbohydrate will be an invaluable tool for helping assess docking poses and the effects of mutations on protein-carbohydrate affinity, unravelling important aspects that drive binding recognition.
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Affiliation(s)
- Thanh Binh Nguyen
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Systems and Computational Biology, Bio21 Institute, University of Melbourne, Melbourne, Victoria, Australia.,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Douglas E V Pires
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Systems and Computational Biology, Bio21 Institute, University of Melbourne, Melbourne, Victoria, Australia.,School of Computing and Information Systems, University of Melbourne, Melbourne, Victoria, Australia
| | - David B Ascher
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Systems and Computational Biology, Bio21 Institute, University of Melbourne, Melbourne, Victoria, Australia.,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia.,Department of Biochemistry, University of Cambridge, Cambridge, UK
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42
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Nguyen TB, Myung Y, de Sá AGC, Pires DEV, Ascher DB. mmCSM-NA: accurately predicting effects of single and multiple mutations on protein-nucleic acid binding affinity. NAR Genom Bioinform 2021; 3:lqab109. [PMID: 34805992 PMCID: PMC8600011 DOI: 10.1093/nargab/lqab109] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 09/20/2021] [Accepted: 10/27/2021] [Indexed: 02/02/2023] Open
Abstract
While protein-nucleic acid interactions are pivotal for many crucial biological processes, limited experimental data has made the development of computational approaches to characterise these interactions a challenge. Consequently, most approaches to understand the effects of missense mutations on protein-nucleic acid affinity have focused on single-point mutations and have presented a limited performance on independent data sets. To overcome this, we have curated the largest dataset of experimentally measured effects of mutations on nucleic acid binding affinity to date, encompassing 856 single-point mutations and 141 multiple-point mutations across 155 experimentally solved complexes. This was used in combination with an optimized version of our graph-based signatures to develop mmCSM-NA (http://biosig.unimelb.edu.au/mmcsm_na), the first scalable method capable of quantitatively and accurately predicting the effects of multiple-point mutations on nucleic acid binding affinities. mmCSM-NA obtained a Pearson's correlation of up to 0.67 (RMSE of 1.06 Kcal/mol) on single-point mutations under cross-validation, and up to 0.65 on independent non-redundant datasets of multiple-point mutations (RMSE of 1.12 kcal/mol), outperforming similar tools. mmCSM-NA is freely available as an easy-to-use web-server and API. We believe it will be an invaluable tool to shed light on the role of mutations affecting protein-nucleic acid interactions in diseases.
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Affiliation(s)
- Thanh Binh Nguyen
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia,Systems and Computational Biology, Bio21 Institute, University of Melbourne, Melbourne, Victoria, Australia
| | - Yoochan Myung
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia,Systems and Computational Biology, Bio21 Institute, University of Melbourne, Melbourne, Victoria, Australia
| | - Alex G C de Sá
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia,Systems and Computational Biology, Bio21 Institute, University of Melbourne, Melbourne, Victoria, Australia
| | | | - David B Ascher
- To whom correspondence should be addressed. Tel: +61 90354794;
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Nguyen TA, Tran K, Esterman A, Brijnath B, Xiao LD, Schofield P, Bhar S, Wickramasinghe N, Sinclair R, Dang TH, Cullum S, Turana Y, Hinton L, Seeher K, Andrade AQ, Crotty M, Kurrle S, Freel S, Pham T, Nguyen TB, Brodaty H. Empowering Dementia Carers With an iSupport Virtual Assistant (e-DiVA) in Asia-Pacific Regional Countries: Protocol for a Pilot Multisite Randomized Controlled Trial. JMIR Res Protoc 2021; 10:e33572. [PMID: 34783660 PMCID: PMC8663455 DOI: 10.2196/33572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 12/04/2022] Open
Abstract
Background Dementia is a global public health priority with an estimated prevalence of 150 million by 2050, nearly two-thirds of whom will live in the Asia-Pacific region. Dementia creates significant care needs for people with the disease, their families, and carers. iSupport is a self-help platform developed by the World Health Organization (WHO) to provide education, skills training, and support to dementia carers. It has been adapted in some contexts (Australia, India, the Netherlands, and Portugal). Carers using the existing adapted versions have identified the need to have a more user-friendly version that enables them to identify solutions for immediate problems quickly in real time. The iSupport virtual assistant (iSupport VA) is being developed to address this gap and will be evaluated in a randomized controlled trial (RCT). Objective This paper reports the protocol of a pilot RCT evaluating the iSupport VA. Methods Seven versions of iSupport VA will be evaluated in Australia, Indonesia, New Zealand, and Vietnam in a pilot RCT. Feasibility, acceptability, intention to use, and preliminary impact on carer-perceived stress of the iSupport VA intervention will be assessed. Results This study was funded by the e-ASIA Joint Research Program in November 2020. From January to July 2023, we will enroll 140 dementia carers (20 carers per iSupport VA version) for the pilot RCT. The study has been approved by the Human Research Committee, University of South Australia, Australia (203455). Conclusions This protocol outlines how a technologically enhanced version of the WHO iSupport program—the iSupport VA—will be evaluated. The findings from this intervention study will provide evidence on the feasibility and acceptability of the iSupport VA intervention, which will be the basis for conducting a full RCT to assess the effectiveness of the iSupport VA. The study will be an important reference for countries planning to adapt and enhance the WHO iSupport program using digital health solutions. Trial Registration Australian New Zealand Clinical Trials Registry ACTRN12621001452886; https://tinyurl.com/afum5tjz International Registered Report Identifier (IRRID) PRR1-10.2196/33572
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Affiliation(s)
- Tuan Anh Nguyen
- Social Gerontology Division, National Ageing Research Institute, Melbourne, Australia.,UniSA Clinical and Health Sciences, University of South Australia, Adelaide, Australia.,Health Strategy and Policy Institute, Ministry of Health, Hanoi, Vietnam
| | - Kham Tran
- Social Gerontology Division, National Ageing Research Institute, Melbourne, Australia.,UniSA Clinical and Health Sciences, University of South Australia, Adelaide, Australia
| | - Adrian Esterman
- UniSA Clinical and Health Sciences, University of South Australia, Adelaide, Australia
| | - Bianca Brijnath
- Social Gerontology Division, National Ageing Research Institute, Melbourne, Australia
| | - Lily Dongxia Xiao
- College of Nursing and Health Sciences, Flinders University, Adelaide, Australia
| | - Penelope Schofield
- Department of Psychology, School of Health Sciences, Swinburne University of Technology, Melbourne, Australia
| | - Sunil Bhar
- Department of Psychology, School of Health Sciences, Swinburne University of Technology, Melbourne, Australia
| | - Nilmini Wickramasinghe
- Department of Psychology, School of Health Sciences, Swinburne University of Technology, Melbourne, Australia
| | - Ronald Sinclair
- Faculty of Sciences, University of Adelaide, Adelaide, Australia
| | - Thu Ha Dang
- Department of Psychology, School of Health Sciences, Swinburne University of Technology, Melbourne, Australia
| | - Sarah Cullum
- Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Yuda Turana
- School of Medicine, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia
| | - Ladson Hinton
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, CA, United States
| | - Katrin Seeher
- Department of Mental Health and Substance Use, World Health Organization, Geneva, Switzerland
| | - Andre Q Andrade
- Quality Use of Medicines and Pharmacy Research Centre, University of South Australia, Adelaide, Australia
| | - Maria Crotty
- College of Medicine and Public Health, Flinders University, Adelaide, Australia
| | - Susan Kurrle
- Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Stefanie Freel
- Department of Germanic Languages and Literature, University of Toronto, Toronto, ON, Canada
| | - Thang Pham
- Department of Neurology and Alzheimer Disease, Vietnam National Geriatric Hospital, Hanoi, Vietnam
| | - Thanh Binh Nguyen
- Department of Neurology and Alzheimer Disease, Vietnam National Geriatric Hospital, Hanoi, Vietnam
| | - Henry Brodaty
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, Australia
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Nguyen LA, Nguyen TTT, Ngo QA, Nguyen TB. Fe/S-Catalyzed synthesis of 2-benzoylbenzoxazoles and 2-quinolylbenzoxazoles via redox condensation of o-nitrophenols with acetophenones and methylquinolines. Org Biomol Chem 2021; 19:6015-6020. [PMID: 34156054 DOI: 10.1039/d1ob00976a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An Fe/S catalyst generated in situ from FeCl2·4H2O and elemental sulfur S8 in the presence of a tertiary amine as a base was found to catalyze efficiently a 6e- redox condensation of o-nitrophenols with acetophenones and methylquinolines. The condensed products 2-benzoylbenzoxazoles and 2-quinolylbenzoxazoles were obtained in reasonable yields with water as the only byproduct at a temperature as low as 80 °C.
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Affiliation(s)
- Le Anh Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Thi Thu Tram Nguyen
- Department of Chemistry, Faculty of Science, Can Tho University of Medicine and Pharmacy, Vietnam
| | - Quoc Anh Ngo
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
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Nguyen TB, Lane DP, Verma CS. Can Glycosylation Mask the Detection of MHC Expressing p53 Peptides by T Cell Receptors? Biomolecules 2021; 11:biom11071056. [PMID: 34356680 PMCID: PMC8301869 DOI: 10.3390/biom11071056] [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] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/28/2021] [Accepted: 07/07/2021] [Indexed: 12/02/2022] Open
Abstract
Proteins of the major histocompatibility complex (MHC) class I, or human leukocyte antigen (HLA) in humans interact with endogenous peptides and present them to T cell receptors (TCR), which in turn tune the immune system to recognize and discriminate between self and foreign (non-self) peptides. Of especial importance are peptides derived from tumor-associated antigens. T cells recognizing these peptides are found in cancer patients, but not in cancer-free individuals. What stimulates this recognition, which is vital for the success of checkpoint based therapy? A peptide derived from the protein p53 (residues 161–169 or p161) was reported to show this behavior. T cells recognizing this unmodified peptide could be further stimulated in vitro to create effective cancer killing CTLs (cytotoxic T lymphocytes). We hypothesize that the underlying difference may arise from post-translational glycosylation of p161 in normal individuals, likely masking it against recognition by TCR. Defects in glycosylation in cancer cells may allow the presentation of the native peptide. We investigate the structural consequences of such peptide glycosylation by investigating the associated structural dynamics.
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Affiliation(s)
- Thanh Binh Nguyen
- Division of Biomolecular Structure to Mechanism, Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), Singapore 138671, Singapore;
| | - David P. Lane
- p53 Laboratory, Agency for Science, Technology and Research (A*STAR), Singapore 138648, Singapore;
| | - Chandra S. Verma
- Division of Biomolecular Structure to Mechanism, Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), Singapore 138671, Singapore;
- School of Biological Sciences, College of Science, Nanyang Technological University, Singapore 637551, Singapore
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore 117543, Singapore
- Correspondence: ; Tel.: +65-6478-8273; Fax: +65-6478-9048
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Nguyen TB, Retailleau P. Base-Catalyzed Three-Component Reaction between Chalcones, Isothiocyanates, and Sulfur: Access to Thiazole-2-thiones. Org Lett 2021; 23:5344-5348. [PMID: 34227811 DOI: 10.1021/acs.orglett.1c01653] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A convenient synthesis of thiazole-2-thiones was developed based on base-catalyzed three-component reactions between chalcones, isothiocyanates, and elemental sulfur.
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Affiliation(s)
- Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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Nguyen TB, Mac DH, Retailleau P. Base-Catalyzed Three-Component Reaction of α-Cyanoacetates with Chalcones and Elemental Sulfur: Access to 2-Aminothiophenes Unobtainable via the Gewald Reaction. J Org Chem 2021; 86:9418-9427. [PMID: 34197118 DOI: 10.1021/acs.joc.1c00740] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although the Gewald reaction was well-known for more than half a century as an excellent method providing bioactive 2-aminothiophenes from reactions of α-cyanoacetates and carbonyl compounds and elemental sulfur, its application to dibenzoylmethanes as the carbonyl substrates was, however, unknown and experimentally proven unsuccessful. We propose here a convenient approach to such a series of compounds by a DABCO-catalyzed, one-pot, two-step, three-component reaction of α-cyanoacetate with chalcones and elemental sulfur. This catalytic strategy is highlighted by its excellent atom/step efficiency and high degree of structural diversification by simply choosing the suitable starting chalcones, which are unarguably much more readily available than dibenzoylmethanes.
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Affiliation(s)
- Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Dinh Hung Mac
- Faculty of Chemistry, VNU University of Science, Vietnam National University in Hanoi, 19 Le Thanh Tong, Hanoi 10000, Vietnam
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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Nguyen LA, Ngo QA, Retailleau P, Nguyen TB. Break‐and‐Build Strategy for the Synthesis of 2‐Benzoylbenzoxazoles from
o
‐Aminophenols and Acetophenones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100150] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Le Anh Nguyen
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
- Graduate University of Science and Technology Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Quoc Anh Ngo
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
- Graduate University of Science and Technology Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles CNRS UPR 2301 Université Paris-Sud Université Paris-Saclay 1 avenue de la Terrasse 91198 Gif-sur-Yvette France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles CNRS UPR 2301 Université Paris-Sud Université Paris-Saclay 1 avenue de la Terrasse 91198 Gif-sur-Yvette France
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Tran TH, Nguyen THT, Nguyen MH, Pham NH, Ngac AB, Mai HH, Pham VT, Nguyen TB, Ho KH, Nguyen TT, Nguyen VT. Synthesis of ZnO/Au Nanorods for Self Cleaning Applications. J Nanosci Nanotechnol 2021; 21:2621-2625. [PMID: 33500084 DOI: 10.1166/jnn.2021.19110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Zinc oxide (ZnO) is a well-known semiconductor with valuable characteristics: wide direct band gap of ˜3.3 eV, large exciton binding energy of 60 meV at room temperature, high efficient photocatalyst, etc. which have been applied in many fields such as optical devices (LEDs, laser), solar cells and sensors. Besides, various low dimensional structures of ZnO in terms of nanoparticles, nanorods, nanoneedles, nanotetrapods find applications in technology and life. This material is also appealing due to the diversity of available processing methods including both chemical and physical approaches such as: hydrothermal, sol-gel, chemical vapor deposition and sputtering. In this report, ZnO nanorods are prepared by hydrothermal method assisted with galvanic-cell effect. The effect of counter electrode materials on the morphology and structure of obtained product was studied. Scanning electron microscopy (SEM) images of the product showed that counter electrodes made of aluminum offers nanorods of higher quality than other materials in terms of uniform size, high density and good preferred orientation. The as-prepared nanorods were then sputtered with gold (Au). ZnO/Au nanostructures show excellent photocatalyst activities which were demonstrated by complete photodegradation of methylene blue (Mb) under UV irradiation and high decomposition rate k of 0.011 min-1.
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Affiliation(s)
- Thi Ha Tran
- Department of Physics, Faculty of Basic Science, University of Mining and Geology, Duc Thang, Tu Liem, 11910, Hanoi
| | - Thi Huyen Trang Nguyen
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
| | - Manh Hong Nguyen
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
| | - Nguyen Hai Pham
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
| | - An Bang Ngac
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
| | - Hanh Hong Mai
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
| | - Van Thanh Pham
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
| | - Thanh Binh Nguyen
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
| | - Khac Hieu Ho
- Institute of Research and Development, Duy Tan University, 03 Quang Trung, Hai Chau, Da Nang 550000, Vietnam
| | - Trong Tam Nguyen
- Department of Physics, Faculty of Basic-Fundamental Sciences, Vietnam Maritime University, 484 Lach Tray - Le Chan - 182582, Hai Phong
| | - Viet Tuyen Nguyen
- Faculty of Physics, VNU-University of Science, Vietnam National University Hanoi, 334 Nguyen Trai, Thanh Xuan, 120000, Hanoi
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Kannan S, Aronica PGA, Nguyen TB, Li J, Verma CS. Computational Design of Macrocyclic Binders of S100B(ββ): Novel Peptide Theranostics. Molecules 2021; 26:721. [PMID: 33573254 PMCID: PMC7866529 DOI: 10.3390/molecules26030721] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 01/25/2021] [Accepted: 01/26/2021] [Indexed: 01/08/2023] Open
Abstract
S100B(ββ) proteins are a family of multifunctional proteins that are present in several tissues and regulate a wide variety of cellular processes. Their altered expression levels have been associated with several human diseases, such as cancer, inflammatory disorders and neurodegenerative conditions, and hence are of interest as a therapeutic target and a biomarker. Small molecule inhibitors of S100B(ββ) have achieved limited success. Guided by the wealth of available experimental structures of S100B(ββ) in complex with diverse peptides from various protein interacting partners, we combine comparative structural analysis and molecular dynamics simulations to design a series of peptides and their analogues (stapled) as S100B(ββ) binders. The stapled peptides were subject to in silico mutagenesis experiments, resulting in optimized analogues that are predicted to bind to S100B(ββ) with high affinity, and were also modified with imaging agents to serve as diagnostic tools. These stapled peptides can serve as theranostics, which can be used to not only diagnose the levels of S100B(ββ) but also to disrupt the interactions of S100B(ββ) with partner proteins which drive disease progression, thus serving as novel therapeutics.
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Affiliation(s)
- Srinivasaraghavan Kannan
- Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, Singapore 138671, Singapore; (P.G.A.A.); (T.B.N.); (J.L.)
| | - Pietro G. A. Aronica
- Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, Singapore 138671, Singapore; (P.G.A.A.); (T.B.N.); (J.L.)
| | - Thanh Binh Nguyen
- Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, Singapore 138671, Singapore; (P.G.A.A.); (T.B.N.); (J.L.)
| | - Jianguo Li
- Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, Singapore 138671, Singapore; (P.G.A.A.); (T.B.N.); (J.L.)
- Singapore Eye Research Institute, Singapore 169856, Singapore
| | - Chandra S. Verma
- Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, Singapore 138671, Singapore; (P.G.A.A.); (T.B.N.); (J.L.)
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore
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