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Leśniak RK, Nichols RJ, Schonemann M, Zhao J, Gajera CR, Lam G, Nguyen KC, Langston JW, Smith M, Montine TJ. Discovery of 1 H-Pyrazole Biaryl Sulfonamides as Novel G2019S-LRRK2 Kinase Inhibitors. ACS Med Chem Lett 2022; 13:981-988. [DOI: 10.1021/acsmedchemlett.2c00116] [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] [Received: 03/16/2022] [Accepted: 05/18/2022] [Indexed: 11/29/2022] Open
Affiliation(s)
- Robert K. Leśniak
- Medicinal Chemistry Knowledge Center, Sarafan ChEM-H, Stanford University, Stanford, California 94305, United States
- Department of Pathology, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
| | - R. Jeremy Nichols
- Department of Pathology, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
| | - Marcus Schonemann
- Department of Pathology, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
| | - Jing Zhao
- Department of Pathology, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
| | - Chandresh R. Gajera
- Department of Pathology, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
| | - Grace Lam
- Departments of Medicine and Microbiology and Immunology, Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Khanh C. Nguyen
- Departments of Medicine and Microbiology and Immunology, Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, California 94305, United States
| | - J. William Langston
- Department of Pathology, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
- Department of Neurology and Neuroscience, Stanford University, 300 Pasteur Drive, Stanford, California 94304, United States
| | - Mark Smith
- Medicinal Chemistry Knowledge Center, Sarafan ChEM-H, Stanford University, Stanford, California 94305, United States
| | - Thomas J. Montine
- Department of Pathology, Stanford University, 300 Pasteur Drive, Stanford, California 94305, United States
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2
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Meier MJ, Nguyen KC, Crosthwait J, Kawata A, Rigden M, Leingartner K, Wong A, Holloway A, Shwed PS, Beaudette L, Navarro M, Wade M, Tayabali AF. Low dose antibiotic ingestion potentiates systemic and microbiome changes induced by silver nanoparticles. NanoImpact 2021; 23:100343. [PMID: 35559844 DOI: 10.1016/j.impact.2021.100343] [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] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/29/2021] [Accepted: 07/12/2021] [Indexed: 06/15/2023]
Abstract
Changes in the mammalian gut microbiome are linked to the impairment of immunological function and numerous other pathologies. Antimicrobial silver nanoparticles (AgNPs) are incorporated into numerous consumer products (e.g., clothing, cosmetics, food packaging), which may directly impact the gut microbiome through ingestion. The human health impact of chronic AgNP ingestion is still uncertain, but evidence from exposure to other antimicrobials provides a strong rationale to assess AgNP effects on organ function, immunity, metabolism, and gut-associated microbiota. To investigate this, mice were gavaged daily for 5 weeks with saline, AgNPs, antibiotics (ciprofloxacin and metronidazole), or AgNPs combined with antibiotics. Animals were weighed daily, assessed for glucose tolerance, organ function, tissue and blood cytokine and leukocyte levels. At the end of the study, we used 16S rDNA amplicon and whole-metagenome shotgun sequencing to assess changes in the gut microbiome. In mice exposed to both AgNPs and antibiotics, silver was found in the stomach, and small and large intestines, but negligible amounts were present in other organs examined. Mice exposed to AgNPs alone showed minimal tissue silver levels. Antibiotics, but not AgNPs, altered glucose metabolism. Mice given AgNPs and antibiotics together demonstrated slower weight gain, reduced peripheral lymphocytes, and elevated splenic, but not circulatory markers of inflammation. 16S rDNA profiling of cecum and feces and metagenomic sequencing of fecal DNA demonstrated that combined AgNP-antibiotic treatment also significantly altered the structure and function of the gut microbiota, including depletion of the indicator species Akkermansia muciniphila. This study provides evidence for possible biological effects from repeated ingestion of AgNP-containing consumer products when antibiotics are also being used and raises concern that an impaired gut microbiome (e.g., through antibiotic use) can potentiate the harm from chemical exposures such as AgNPs.
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Affiliation(s)
- Matthew J Meier
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada
| | - K C Nguyen
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada; New Substances Assessment and Control Bureau, Health Canada, Ottawa, Canada
| | - J Crosthwait
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada
| | - A Kawata
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada
| | - M Rigden
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada
| | - K Leingartner
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada
| | - A Wong
- Department of Biology, Carleton University, Ottawa, Canada
| | - A Holloway
- Department of Obstetrics and Gynecology, McMaster University, Hamilton, Canada
| | - P S Shwed
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada
| | - Lee Beaudette
- Ecotoxicology and Wildlife Health Division, Environment and Climate Change Canada, Ottawa, Canada
| | - M Navarro
- Bureau of Chemical Safety, Health Canada, Ottawa, Canada
| | - M Wade
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada
| | - A F Tayabali
- Environmental Health, Science and Research Bureau, Health Canada, Ottawa, Canada.
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3
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Nguyen TBP, Nguyen TA, Luu BK, Le TTO, Nguyen VS, Nguyen KC, Duong KD, Nguyen HB, Nguyen NL, Fox GJ, Nguyen NV, Marks GB. A comparison of digital chest radiography and Xpert ® MTB/RIF in active case finding for tuberculosis. Int J Tuberc Lung Dis 2020; 24:934-940. [PMID: 33156761 DOI: 10.5588/ijtld.19.0764] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE: To compare two community screening tests for TB: sputum examination using Xpert® MTB/RIF and chest radiography (CXR).METHOD: Men aged ≥15 years and women aged >45 years living in 96 sub-communes in Ca Mau, Viet Nam, were invited to provide a single sputum specimen that was tested using Xpert. Participants were also invited to attend a nearby location for digital radiography. Participants whose sputum was Xpert MTB-positive or whose CXR was reported as 'consistent with TB´ were requested to provide two further sputum specimens for culture. The sensitivities of the two tests for detecting TB (defined as sputum culture-positive for Mycobacterium tuberculosis) were compared.RESULTS: There were 72 985 eligible participants, of whom 57 597 (78.9%) participated in Xpert screening, 12 752 (17.5%) had CXR and 11 235 (15.4%) had both tests. We estimated that there were 59 cases of TB, of whom 20 were Xpert MTB-positive (programmatic sensitivity 34.0%) and 47 had CXR reported as 'consistent with TB´ (sensitivity 80.0%, P < 0.0001).CONCLUSION: In community-wide screening for TB, CXR is more sensitive than a single spontaneously expectorated sputum sample tested using Xpert, but it has a substantially lower participation rate.
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Affiliation(s)
- T B P Nguyen
- Woolcock Institute of Medical Research, Hanoi, Viet Nam
| | - T A Nguyen
- Woolcock Institute of Medical Research, Hanoi, Viet Nam, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - B K Luu
- Woolcock Institute of Medical Research, Hanoi, Viet Nam
| | - T T O Le
- Woolcock Institute of Medical Research, Hanoi, Viet Nam
| | - V S Nguyen
- National TB Control Programme, Hanoi, Centre for Social Disease Control, Ca Mau
| | - K C Nguyen
- National Lung Hospital, Hanoi, Hanoi Medical University, Hanoi
| | - K D Duong
- University of Medicine and Pharmacy, Ho Chi Minh city, Viet Nam
| | - H B Nguyen
- National TB Control Programme, Hanoi, National Lung Hospital, Hanoi, Centre for Operational Research, International Union Against Tuberculosis and Lung Disease, Paris, France
| | - N L Nguyen
- Global Tuberculosis Program, World Health Organization, Geneva, Switzerland
| | - G J Fox
- Woolcock Institute of Medical Research, Hanoi, Viet Nam, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - N V Nguyen
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia, National TB Control Programme, Hanoi, National Lung Hospital, Hanoi, Hanoi Medical University, Hanoi
| | - G B Marks
- Woolcock Institute of Medical Research, Hanoi, Viet Nam, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia, South Western Sydney Clinical School, University of NSW, Sydney, NSW, Australia
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4
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Fox GJ, Nguyen VN, Dinh NS, Nghiem LPH, Le TNA, Nguyen TA, Nguyen BH, Nguyen HD, Tran NB, Nguyen TL, Le TN, Nguyen VH, Phan TL, Nguyen KC, Ho J, Pham DC, Britton WJ, Bestrashniy JRBM, Marks GB. Post-treatment Mortality Among Patients With Tuberculosis: A Prospective Cohort Study of 10 964 Patients in Vietnam. Clin Infect Dis 2020; 68:1359-1366. [PMID: 30202910 DOI: 10.1093/cid/ciy665] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 08/14/2018] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Tuberculosis is the leading infectious cause of death. Steep reductions in tuberculosis-related mortality are required to realize the World Health Organization's "End Tuberculosis Strategy." However, accurate mortality estimates are lacking in many countries, particularly following discharge from care. This study aimed to establish the mortality rate among patients with pulmonary tuberculosis in Vietnam and to quantify the excess mortality in this population. METHODS We conducted a prospective cohort study among adult patients treated for smear-positive pulmonary tuberculosis in 70 clinics across Vietnam. People living in the same households were recruited as controls. Participants were re-interviewed and their survival was established at least 2 years after their treatment with an 8-month standardized regimen. The presence of relapse was established by linking identifying data on patients and controls to clinic registries. Verbal autopsies were performed. The cumulative mortality among patients was compared to that among a control population, adjusting for age and gender. RESULTS We enrolled 10964 patients and 25707 household controls. Among enrolled tuberculosis patients, 9% of patients died within a median follow-up period of 2.9 years: 342 (3.1%) during treatment and 637 (5.8%) after discharge. The standardized mortality ratio was 4.0 (95% confidence interval 3.7-4.2) among patients with tuberculosis, compared to the control population. Tuberculosis was the likely cause of death for 44.7% of these deceased patients. CONCLUSIONS Patients treated for tuberculosis had a markedly elevated risk of death, particularly in the post-treatment period. Interventions to reduce tuberculosis mortality must enhance the early detection of drug-resistance, improve treatment effectiveness, and address non-communicable diseases.
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Affiliation(s)
- G J Fox
- Faculty of Medicine and Health, University of Sydney, Australia.,Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - V N Nguyen
- National Lung Hospital, Ba Dinh, Hanoi, Vietnam
| | - N S Dinh
- National Lung Hospital, Ba Dinh, Hanoi, Vietnam
| | - L P H Nghiem
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - T N A Le
- National Lung Hospital, Ba Dinh, Hanoi, Vietnam
| | - T A Nguyen
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - B H Nguyen
- National Lung Hospital, Ba Dinh, Hanoi, Vietnam.,Centre for Operational Research, International Union Against Tuberculosis and Lung Disease, Paris, France
| | - H D Nguyen
- Pham Ngoc Thach Hospital, Ho Chi Minh City, Vietnam
| | - N B Tran
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - T L Nguyen
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - T N Le
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - V H Nguyen
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - T L Phan
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - K C Nguyen
- National Lung Hospital, Ba Dinh, Hanoi, Vietnam.,Hanoi Medical University, Hanoi, Vietnam
| | - J Ho
- Faculty of Medicine and Health, University of Sydney, Australia
| | - D C Pham
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia
| | - W J Britton
- Faculty of Medicine and Health, University of Sydney, Australia.,Centenary Institute of Cancer Medicine and Cell Biology, University of Sydney, Camperdown, New South Wales, Australia
| | | | - G B Marks
- Woolcock Institute of Medical Research, Glebe, New South Wales, Australia.,South Western Sydney Clinical School, University of New South Wales, Kensington, New South Wales, Australia
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5
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Le YH, Nguyen KC, Coleman KK, Nguyen TT, Than ST, Phan HH, Nguyen MD, Ngu ND, Phan DT, Hoang PVM, Trieu LP, Bailey ES, Warkentien TE, Gray GC. Virus detections among patients with severe acute respiratory illness, Northern Vietnam. PLoS One 2020; 15:e0233117. [PMID: 32396550 PMCID: PMC7217455 DOI: 10.1371/journal.pone.0233117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 04/28/2020] [Indexed: 01/02/2023] Open
Abstract
Severe acute respiratory illness (SARI) is a major cause of death and morbidity in low- and middle-income countries, however, the etiologic agents are often undetermined due to the lack of molecular diagnostics in hospitals and clinics. To examine evidence for select viral infections among patients with SARI in northern Vietnam, we studied 348 nasopharyngeal samples from military and civilian patients admitted to 4 hospitals in the greater Hanoi area from 2017–2019. Initial screening for human respiratory viral pathogens was performed in Hanoi, Vietnam at the National Institute of Hygiene and Epidemiology (NIHE) or the Military Institute of Preventative Medicine (MIPM), and an aliquot was shipped to Duke-NUS Medical School in Singapore for validation. Patient demographics were recorded and used to epidemiologically describe the infections. Among military and civilian cases of SARI, 184 (52.9%) tested positive for one or more respiratory viruses. Influenza A virus was the most prevalent virus detected (64.7%), followed by influenza B virus (29.3%), enterovirus (3.8%), adenovirus (1.1%), and coronavirus (1.1%). Risk factor analyses demonstrated an increased risk of influenza A virus detection among military hospital patients (adjusted OR, 2.0; 95% CI, 1.2–3.2), and an increased risk of influenza B virus detection among patients enrolled in year 2017 (adjusted OR, 7.9; 95% CI, 2.7–22.9). As influenza A and B viruses were commonly associated with SARI and are treatable, SARI patients entering these hospitals would benefit if the hospitals were able to adapt onsite molecular diagnostics.
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Affiliation(s)
- Yen H. Le
- Military Institute of Preventive Medicine, Hanoi, Vietnam
| | - Khanh C. Nguyen
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Kristen K. Coleman
- Emerging Infectious Diseases Programme, Duke-National University of Singapore, Singapore
| | - Tham T. Nguyen
- Emerging Infectious Diseases Programme, Duke-National University of Singapore, Singapore
| | - Son T. Than
- Emerging Infectious Diseases Programme, Duke-National University of Singapore, Singapore
| | - Hai H. Phan
- Hai Phong Provincial Preventive Medicine Center, Hai Phong, Vietnam
| | - Manh D. Nguyen
- Military Institute of Preventive Medicine, Hanoi, Vietnam
| | - Nghia D. Ngu
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Dan T. Phan
- Military Institute of Preventive Medicine, Hanoi, Vietnam
| | | | - Long P. Trieu
- Military Institute of Preventive Medicine, Hanoi, Vietnam
| | - Emily S. Bailey
- Division of Infectious Diseases, Global Health Institute, Duke University, Durham, North Carolina, United States of America
| | | | - Gregory C. Gray
- Emerging Infectious Diseases Programme, Duke-National University of Singapore, Singapore
- Division of Infectious Diseases, Global Health Institute, Duke University, Durham, North Carolina, United States of America
- Global Health Center, Duke Kunshan University, Kunshan, China
- * E-mail:
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6
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Huang W, Masureel M, Qu Q, Janetzko J, Inoue A, Kato HE, Robertson MJ, Nguyen KC, Glenn JS, Skiniotis G, Kobilka BK. Structure of the neurotensin receptor 1 in complex with β-arrestin 1. Nature 2020; 579:303-308. [PMID: 31945771 PMCID: PMC7100716 DOI: 10.1038/s41586-020-1953-1] [Citation(s) in RCA: 209] [Impact Index Per Article: 52.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 01/08/2020] [Indexed: 01/14/2023]
Abstract
Arrestin proteins bind to active, phosphorylated G-protein-coupled receptors (GPCRs), thereby preventing G-protein coupling, triggering receptor internalization and affecting various downstream signalling pathways1,2. Although there is a wealth of structural information detailing the interactions between GPCRs and G proteins, less is known about how arrestins engage GPCRs. Here we report a cryo-electron microscopy structure of full-length human neurotensin receptor 1 (NTSR1) in complex with truncated human β-arrestin 1 (βarr1(ΔCT)). We find that phosphorylation of NTSR1 is critical for the formation of a stable complex with βarr1(ΔCT), and identify phosphorylated sites in both the third intracellular loop and the C terminus that may promote this interaction. In addition, we observe a phosphatidylinositol-4,5-bisphosphate molecule forming a bridge between the membrane side of NTSR1 transmembrane segments 1 and 4 and the C-lobe of arrestin. Compared with a structure of a rhodopsin-arrestin-1 complex, in our structure arrestin is rotated by approximately 85° relative to the receptor. These findings highlight both conserved aspects and plasticity among arrestin-receptor interactions.
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Affiliation(s)
- Weijiao Huang
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA
| | - Matthieu Masureel
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA
| | - Qianhui Qu
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - John Janetzko
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA
| | - Asuka Inoue
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | - Hideaki E Kato
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA
- Komaba Institute for Science, The University of Tokyo, Tokyo, Japan
| | - Michael J Robertson
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Khanh C Nguyen
- Departments of Medicine and Microbiology & Immunology, Stanford University, Stanford, CA, USA
| | - Jeffrey S Glenn
- Departments of Medicine and Microbiology & Immunology, Stanford University, Stanford, CA, USA
| | - Georgios Skiniotis
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA.
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA.
- Department of Photon Science, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, USA.
| | - Brian K Kobilka
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA, USA.
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7
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Carozza JA, Böhnert V, Nguyen KC, Skariah G, Shaw KE, Brown JA, Rafat M, von Eyben R, Graves EE, Glenn JS, Smith M, Li L. Extracellular cGAMP is a cancer cell-produced immunotransmitter involved in radiation-induced anti-cancer immunity. Nat Cancer 2020; 1:184-196. [PMID: 33768207 PMCID: PMC7990037 DOI: 10.1038/s43018-020-0028-4] [Citation(s) in RCA: 162] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 01/15/2020] [Indexed: 12/18/2022]
Abstract
2'3'-cyclic GMP-AMP (cGAMP) is an intracellular second messenger that is synthesized in response to cytosolic double-stranded DNA and activates the innate immune STING pathway. Our previous discovery of its extracellular hydrolase ENPP1 hinted at the existence of extracellular cGAMP. Here, we detected that cGAMP is continuously exported but then efficiently cleared by ENPP1, explaining why it has previously escaped detection. By developing potent, specific, and cell impermeable ENPP1 inhibitors, we found that cancer cells continuously export cGAMP in culture at steady state and at higher levels when treated with ionizing radiation (IR). In mouse tumors, depletion of extracellular cGAMP decreased tumor-associated immune cell infiltration and abolished the curative effect of IR. Boosting extracellular cGAMP with ENPP1 inhibitors synergized with IR to delay tumor growth. In conclusion, extracellular cGAMP is an anti-cancer immunotransmitter that could be harnessed to treat cancers with low immunogenicity.
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Affiliation(s)
- Jacqueline A Carozza
- Department of Chemistry, Stanford University, Stanford, CA, USA
- Stanford ChEM-H, Stanford University, Stanford, CA, USA
| | - Volker Böhnert
- Stanford ChEM-H, Stanford University, Stanford, CA, USA
- Department of Biochemistry, Stanford University, School of Medicine, Stanford, CA, USA
| | - Khanh C Nguyen
- Departments of Medicine and Microbiology & Immunology, Stanford University, School of Medicine, Stanford, CA, USA
| | - Gemini Skariah
- Stanford ChEM-H, Stanford University, Stanford, CA, USA
- Department of Biochemistry, Stanford University, School of Medicine, Stanford, CA, USA
| | - Kelsey E Shaw
- Stanford ChEM-H, Stanford University, Stanford, CA, USA
- Department of Biochemistry, Stanford University, School of Medicine, Stanford, CA, USA
| | - Jenifer A Brown
- Stanford ChEM-H, Stanford University, Stanford, CA, USA
- Biophysics Program, Stanford University, Stanford, CA, USA
| | - Marjan Rafat
- Department of Radiation Oncology, Stanford University, School of Medicine, Stanford, CA, USA
| | - Rie von Eyben
- Department of Radiation Oncology, Stanford University, School of Medicine, Stanford, CA, USA
| | - Edward E Graves
- Department of Radiation Oncology, Stanford University, School of Medicine, Stanford, CA, USA
| | - Jeffrey S Glenn
- Departments of Medicine and Microbiology & Immunology, Stanford University, School of Medicine, Stanford, CA, USA
| | - Mark Smith
- Stanford ChEM-H, Stanford University, Stanford, CA, USA
| | - Lingyin Li
- Stanford ChEM-H, Stanford University, Stanford, CA, USA.
- Department of Biochemistry, Stanford University, School of Medicine, Stanford, CA, USA.
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8
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Nguyen TD, Nguyen TN, Nguyen KC, Tran QN, Hoang AN, Egorova NS, Starkov VG, Tsetlin VI, Utkin YN. Encapsulation of Neurotoxins, Blockers of Nicotinic Acetylcholine Receptors, in Nanomaterials Based on Sulfated Polysaccharides. DOKL BIOCHEM BIOPHYS 2019; 487:251-255. [PMID: 31559591 DOI: 10.1134/s1607672919040021] [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] [Received: 03/06/2019] [Indexed: 11/22/2022]
Abstract
Three-finger snake neurotoxins are selective antagonists of some nicotinic acetylcholine receptor subtypes and are widely used to study these receptors. The peptide neurotoxin azemiopsin, recently isolated from the venom of Azemipos feae, is a selective blocker of muscle-type nicotinic acetylcholine receptor. In order to reduce their toxicity and increase resistance under physiological conditions, we have encapsulated these toxins into nanomaterials. The study of nanomaterials after interaction with neurotoxins by the methods of transmission electron microscopy and dynamic light scattering revealed an increase in the size of nanoparticles, which indicates the inclusion of neurotoxins in nanomaterials.
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Affiliation(s)
- Tr D Nguyen
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - T N Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam.,Tra Vinh University, Tra Vinh City, Vietnam
| | - K C Nguyen
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Q N Tran
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - A N Hoang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - N S Egorova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997, Moscow, Russia
| | - V G Starkov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997, Moscow, Russia
| | - V I Tsetlin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997, Moscow, Russia
| | - Yu N Utkin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997, Moscow, Russia.
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9
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Katona LB, Rosen JM, Vu NC, Nguyen CK, Dang LT, Thiem VD, Nguyen KC, Ratner KG, Gan K, Katona P. A New Paradigm for Disease Surveillance in Vietnam. Telemed J E Health 2014; 20:493-5. [DOI: 10.1089/tmj.2013.0250] [Citation(s) in RCA: 10] [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: 11/12/2022] Open
Affiliation(s)
- Lindsay B. Katona
- University of New England College of Osteopathic Medicine, Biddeford, Maine
- Columbia University Mailman School of Public Health, New York, New York
| | - Joseph M. Rosen
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire
| | - Nguyen C. Vu
- Institute of Population, Health, and Development, Hanoi, Vietnam
| | - Cuong K. Nguyen
- Institute of Population, Health, and Development, Hanoi, Vietnam
| | - Linh T. Dang
- Institute of Population, Health, and Development, Hanoi, Vietnam
| | - Vu D. Thiem
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Khanh C. Nguyen
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Kevin Gan
- University of California, Los Angeles, Los Angeles, California
| | - Peter Katona
- University of California, Los Angeles, Los Angeles, California
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10
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Nguyen KC, Seligy VL, Massarsky A, Moon TW, Rippstein P, Tan J, Tayabali AF. Comparison of toxicity of uncoated and coated silver nanoparticles. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/429/1/012025] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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