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Mohammadi A, Chiang S, Li F, Wei F, Lau CS, Aziz M, Ibarrondo FJ, Fulcher JA, Yang OO, Chia D, Kim Y, Wong DT. Direct Detection of 4-Dimensions of SARS-CoV-2: Infection (vRNA), Infectivity (Antigen), Binding Antibody, and Functional Neutralizing Antibody in Saliva. Res Sq 2023:rs.3.rs-3745787. [PMID: 38234820 PMCID: PMC10793499 DOI: 10.21203/rs.3.rs-3745787/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
We developed a 4-parameter clinical assay using Electric Field Induced Release and Measurement (EFIRM) technology to simultaneously assess SARS-CoV-2 RNA (vRNA), nucleocapsid antigen, host binding (BAb) and neutralizing antibody (NAb) levels from a drop of saliva with performance that equals or surpasses current EUA-approved tests. The vRNA and antigen assays achieved lower limit of detection (LOD) of 100 copies/reaction and 3.5 TCID₅₀/mL, respectively. The vRNA assay differentiated between acutely infected (n=10) and infection-naïve patients (n=33) with an AUC of 0.9818, sensitivity of 90%, and specificity of 100%. The antigen assay similarly differentiated these patient populations with an AUC of 1.000. The BAb assay detected BAbs with an LOD of 39 pg/mL and distinguished acutely infected (n=35), vaccinated with prior infection (n=13), and vaccinated infection-naïve patients (n=13) from control (n=81) with AUC of 0.9481, 1.000, and 0.9962, respectively. The NAb assay detected NAbs with an LOD of 31.6 Unit/mL and differentiated between COVID-19 recovered or vaccinated patients (n=31) and pre-pandemic controls (n=60) with an AUC 0.923, sensitivity of 87.10%, and specificity of 86.67%. Our multiparameter assay represents a significant technological advancement to simultaneously address SARS-CoV-2 infection and immunity, and it lays the foundation for tackling potential future pandemics.
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Affiliation(s)
- Aida Mohammadi
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | - Samantha Chiang
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | - Feng Li
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | - Fang Wei
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | | | - Mohammad Aziz
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | - Francisco J. Ibarrondo
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Jennifer A. Fulcher
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Otto O. Yang
- Division of Infectious Diseases, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - David Chia
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | - Yong Kim
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | - David T.W. Wong
- School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
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2
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Cheng J, Swarup N, Li F, Kordi M, Lin CC, Yang SC, Huang WL, Aziz M, Kim Y, Chia D, Yeh YM, Wei F, Zheng D, Zhang L, Pellegrini M, Su WC, Wong DT. Distinct Features of Plasma Ultrashort Single-Stranded Cell-Free DNA as Biomarkers for Lung Cancer Detection. Clin Chem 2023; 69:1270-1282. [PMID: 37725931 PMCID: PMC10644908 DOI: 10.1093/clinchem/hvad131] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 08/01/2023] [Indexed: 09/21/2023]
Abstract
BACKGROUND Using broad range cell-free DNA sequencing (BRcfDNA-Seq), a nontargeted next-generation sequencing (NGS) methodology, we previously identified a novel class of approximately 50 nt ultrashort single-stranded cell-free DNA (uscfDNA) in plasma that is distinctly different from 167 bp mononucleosomal cell-free DNA (mncfDNA). We hypothesize that uscfDNA possesses characteristics that are useful for disease detection. METHODS Using BRcfDNA-Seq, we examined both cfDNA populations in the plasma of 18 noncancer controls and 14 patients with late-stage nonsmall cell lung carcinoma (NSCLC). In comparison to mncfDNA, we assessed whether functional element (FE) peaks, fragmentomics, end-motifs, and G-Quadruplex (G-Quad) signatures could be useful features of uscfDNA for NSCLC determination. RESULTS In noncancer participants, compared to mncfDNA, uscfDNA fragments showed a 45.2-fold increased tendency to form FE peaks (enriched in promoter, intronic, and exonic regions), demonstrated a distinct end-motif-frequency profile, and presented with a 4.9-fold increase in G-Quad signatures. Within NSCLC participants, only the uscfDNA population had discoverable FE peak candidates. Additionally, uscfDNA showcased different end-motif-frequency candidates distinct from mncfDNA. Although both cfDNA populations showed increased fragmentation in NSCLC, the G-Quad signatures were more discriminatory in uscfDNA. Compilation of cfDNA features using principal component analysis revealed that the first 5 principal components of both cfDNA subtypes had a cumulative explained variance of >80%. CONCLUSIONS These observations indicate that the distinct biological processes of uscfDNA and that FE peaks, fragmentomics, end-motifs, and G-Quad signatures are uscfDNA features with promising biomarker potential. These findings further justify its exploration as a distinct class of biomarker to augment pre-existing liquid biopsy approaches.
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Affiliation(s)
- Jordan Cheng
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Neeti Swarup
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Feng Li
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Misagh Kordi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Chien-Chung Lin
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Szu-Chun Yang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wei-Lun Huang
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan, Taiwan
| | - Mohammad Aziz
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Yong Kim
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - David Chia
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Yu-Min Yeh
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan, Taiwan
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Fang Wei
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - David Zheng
- Department of Molecular, Cell and Developmental Biology, Life Sciences Division, University of California, Los Angeles, Los Angeles, CA, United States
| | - Liying Zhang
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Matteo Pellegrini
- Department of Molecular, Cell and Developmental Biology, Life Sciences Division, University of California, Los Angeles, Los Angeles, CA, United States
| | - Wu-Chou Su
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan, Taiwan
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - David T.W. Wong
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, United States
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Swarup N, Cheng J, Choi I, Heo YJ, Kordi M, Li F, Aziz M, Chia D, Wei F, Elashoff D, Zhang L, Kim S, Kim Y, Wong DT. Multi-Faceted Attributes of Salivary Cell-free DNA as Liquid Biopsy Biomarkers for Gastric Cancer Detection. Res Sq 2023:rs.3.rs-3154388. [PMID: 37503289 PMCID: PMC10371094 DOI: 10.21203/rs.3.rs-3154388/v1] [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] [Indexed: 07/29/2023]
Abstract
Background Recent advances in circulating cell-free DNA (cfDNA) analysis from biofluids have opened new avenues for liquid biopsy (LB). However, current cfDNA LB assays are limited by the availability of existing information on established genotypes associated with tumor tissues. Certain cancers present with a limited list of established mutated cfDNA biomarkers, and thus, nonmutated cfDNA characteristics along with alternative biofluids are needed to broaden the available cfDNA targets for cancer detection. Saliva is an intriguing and accessible biofluid that has yet to be fully explored for its clinical utility for cancer detection. Methods In this report, we employed a low-coverage single stranded (ss) library NGS pipeline "Broad-Range cell-free DNA-Seq" (BRcfDNA-Seq) using saliva to comprehensively investigate the characteristics of salivary cfDNA (ScfDNA). The identification of cfDNA features has been made possible by applying novel cfDNA processing techniques that permit the incorporation of ultrashort, ss, and jagged DNA fragments. As a proof of concept using 10 gastric cancer (GC) and 10 noncancer samples, we examined whether ScfDNA characteristics, including fragmentomics, end motif profiles, microbial contribution, and human chromosomal mapping, could differentiate between these two groups. Results Individual and integrative analysis of these ScfDNA features demonstrated significant differences between the two cohorts, suggesting that disease state may affect the ScfDNA population by altering nuclear cleavage or the profile of contributory organism cfDNA to total ScfDNA. We report that principal component analysis integration of several aspects of salivary cell-free DNA fragmentomic profiles, genomic element profiles, end-motif sequence patterns, and distinct oral microbiome populations can differentiate the two populations with a p value of < 0.0001 (PC1). Conclusion These novel features of ScfDNA characteristics could be clinically useful for improving saliva-based LB detection and the eventual monitoring of local or systemic diseases.
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Affiliation(s)
- Neeti Swarup
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jordan Cheng
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Irene Choi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - You Jeong Heo
- The Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06355, Republic of Korea
| | - Misagh Kordi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Feng Li
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Mohammad Aziz
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David Chia
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Fang Wei
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David Elashoff
- Department of Medicine, Biostatistics and Computational Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Liying Zhang
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Sung Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06355, South Korea
| | - Yong Kim
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - David T.W. Wong
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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4
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Salfer B, Li F, Zhu Y, Deng FM, Wong DT, Zhang L. Novel Urinary Liquid Biopsy Biomarkers and Their Role in Detecting Genitourinary Cancers. J Clin Transl Pathol 2023; 000:000-000. [DOI: 10.14218/jctp.2022.00030] [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: 07/03/2023]
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5
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Thiruvenkatarajan V, Sekhar V, Wong DT, Currie J, Van Wijk R, Ludbrook GL. Effect of high-flow nasal oxygen on hypoxaemia during procedural sedation: a systematic review and meta-analysis. Anaesthesia 2023; 78:81-92. [PMID: 36044543 PMCID: PMC10087848 DOI: 10.1111/anae.15845] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2022] [Indexed: 12/13/2022]
Abstract
We conducted a systematic review to evaluate the effect of high-flow nasal oxygen and conventional oxygen therapy during procedural sedation amongst adults and children. We searched MEDLINE, EMBASE and CINAHL for randomised controlled trials that reported the effects of high-flow nasal oxygen during procedural sedation. The primary outcome measure was hypoxaemia and the secondary outcomes were minimum oxygen saturation; hypercarbia; requirement for airway manoeuvres; and procedure interruptions. The quality of evidence was assessed using the revised Cochrane risk-of bias tool and grading of recommendations, assessment, development and evaluation (GRADE). Nineteen randomised controlled trials (4121 patients) including three in children were included. Administration of high-flow nasal oxygen reduced hypoxaemia, risk ratio (95%CI) 0.37 (0.24-0.56), p < 0.001; minor airway manoeuvre requirements, risk ratio (95%CI) 0.26 (0.11-0.59), p < 0.001; procedural interruptions, risk ratio (95%CI) 0.17 (0.05-0.53), p = 0.002; and increased minimum oxygen saturation, mean difference (95%CI) 4.1 (2.70-5.50), p < 0.001; as compared with the control group. High-flow nasal oxygen had no impact on hypercarbia, risk ratio (95%CI) 1.24 (0.97-1.58), p = 0.09, I2 = 0%. High-flow nasal oxygen reduced the incidence of hypoxaemia regardless of the procedure involved, degree of fractional inspired oxygen, risk-profile of patients and mode of propofol administration. The evidence was ascertained as moderate for all outcomes except for procedure interruptions. In summary, high-flow nasal oxygen compared with conventional oxygenation techniques reduced the risk of hypoxaemia, increased minimum oxygen saturation and reduced the requirement for airway manoeuvres. High-flow nasal oxygen should be considered in patients at risk of hypoxaemia during procedural sedation.
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Affiliation(s)
- V Thiruvenkatarajan
- Department of Anaesthesia, Queen Elizabeth Hospital, Woodville, Adelaide, SA, Australia.,Discipline of Acute Care Medicine, University of Adelaide, SA, Australia
| | - V Sekhar
- Department of Anaesthesia, Queen Elizabeth Hospital, Woodville, Adelaide, SA, Australia
| | - D T Wong
- Department of Anesthesiology and Pain Medicine, Toronto Western Hospital, University of Toronto, ON, Canada
| | - J Currie
- Department of Anaesthesia, Queen Elizabeth Hospital, Woodville, Adelaide, SA, Australia
| | - R Van Wijk
- Discipline of Acute Care Medicine, University of Adelaide, SA, Australia.,Department of Anaesthesia, Queen Elizabeth Hospital, Woodville, Adelaide, SA, Australia
| | - G L Ludbrook
- Discipline of Acute Care Medicine, University of Adelaide, SA, Australia
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Abstract
BACKGROUND The current methodology used to detect, diagnose, and monitor many types of cancers requires invasive tissue biopsy testing. Recently, liquid biopsy using blood, plasma, urine, saliva, and various other bodily fluids has shown utility to solve many issues associated with tissue biopsy. Blood/plasma has received most of the attention within the liquid biopsy field, however, obtaining blood samples from patients is still somewhat invasive and requires trained professionals. Using urine to detect cell-free DNA cancer biomarkers offers a truly non-invasive sampling method that can be easily and reproducibly conducted by patients. CONTENT Novel technologies and approaches have made the detection of small quantities of cell-free tumor DNA of varying lengths possible. Recent studies using urine circulating tumor DNA to detect cancer mutations and other biomarkers have shown sensitivity comparable to blood/plasma cell-free DNA liquid biopsy for many cancer types. Thus, urine cell-free DNA liquid biopsy may replace or provide supplementary information to tissue/blood biopsies. Further investigation with larger patient cohorts and standardization of pre-analytical factors is necessary to determine the utility of urine cell-free DNA liquid biopsy for cancer detection, diagnosis, and monitoring in a clinical setting. SUMMARY In this mini-review we discuss the biological aspects of cell-free DNA in urine, numerous studies using urine cell-free DNA to detect urological cancers, and recent studies using urine cell-free DNA to detect and monitor non-urological cancers including lung, breast, colorectal, and other cancers.
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Affiliation(s)
- Blake Salfer
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Feng Li
- School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - David T.W. Wong
- School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Liying Zhang
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
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7
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Li F, Wei F, Grogan TR, Elashoff DE, Vu D, Vigerust DJ, Gupta R, Wong DT. Proficiency Testing of Epidermal Growth Factor Receptor Mutations Detection in Saliva Using Spectrum Saliva Collector (SDNA-1000) and Preservative Solution Detected by Electric Field-Induced Release and Measurement. Biopreserv Biobank 2022; 20:461-464. [PMID: 35878053 PMCID: PMC9603249 DOI: 10.1089/bio.2022.0093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Feng Li
- School of Dentistry, Division of Oral and Systemic Health Sciences, University of California Los Angeles, California, USA
| | - Fang Wei
- School of Dentistry, Division of Oral and Systemic Health Sciences, University of California Los Angeles, California, USA
| | - Tristan R. Grogan
- Department of Medicine Statistics Core, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA
| | - David E. Elashoff
- Department of Medicine Statistics Core, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA
| | - David Vu
- Spectrum Solutions LLC, Draper, Utah, USA
| | | | | | - David T.W. Wong
- School of Dentistry, Division of Oral and Systemic Health Sciences, University of California Los Angeles, California, USA
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8
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Liu Z, Li T, Wang Z, Liu J, Huang S, Min BH, An JY, Kim KM, Kim S, Chen Y, Liu H, Kim Y, Wong DT, Huang TJ, Xie YH. Gold Nanopyramid Arrays for Non-Invasive Surface-Enhanced Raman Spectroscopy-Based Gastric Cancer Detection via sEVs. ACS Appl Nano Mater 2022; 5:12506-12517. [PMID: 36185166 PMCID: PMC9513748 DOI: 10.1021/acsanm.2c01986] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/12/2022] [Indexed: 05/05/2023]
Abstract
Gastric cancer (GC) is one of the most common and lethal types of cancer affecting over one million people, leading to 768,793 deaths globally in 2020 alone. The key for improving the survival rate lies in reliable screening and early diagnosis. Existing techniques including barium-meal gastric photofluorography and upper endoscopy can be costly and time-consuming and are thus impractical for population screening. We look instead for small extracellular vesicles (sEVs, currently also referred as exosomes) sized ⌀ 30-150 nm as a candidate. sEVs have attracted a significantly higher level of attention during the past decade or two because of their potentials in disease diagnoses and therapeutics. Here, we report that the composition information of the collective Raman-active bonds inside sEVs of human donors obtained by surface-enhanced Raman spectroscopy (SERS) holds the potential for non-invasive GC detection. SERS was triggered by the substrate of gold nanopyramid arrays we developed previously. A machine learning-based spectral feature analysis algorithm was developed for objectively distinguishing the cancer-derived sEVs from those of the non-cancer sub-population. sEVs from the tissue, blood, and saliva of GC patients and non-GC participants were collected (n = 15 each) and analyzed. The algorithm prediction accuracies were reportedly 90, 85, and 72%. "Leave-a-pair-of-samples out" validation was further performed to test the clinical potential. The area under the curve of each receiver operating characteristic curve was 0.96, 0.91, and 0.65 in tissue, blood, and saliva, respectively. In addition, by comparing the SERS fingerprints of individual vesicles, we provided a possible way of tracing the biogenesis pathways of patient-specific sEVs from tissue to blood to saliva. The methodology involved in this study is expected to be amenable for non-invasive detection of diseases other than GC.
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Affiliation(s)
- Zirui Liu
- Department
of Materials Science and Engineering, University
of California Los Angeles, Los Angeles, California 90095, United States
| | - Tieyi Li
- Department
of Materials Science and Engineering, University
of California Los Angeles, Los Angeles, California 90095, United States
| | - Zeyu Wang
- Department
of Mechanical Engineering and Material Science, Duke University, Durham, North Carolina 27708, United States
| | - Jun Liu
- Department
of Materials Science and Engineering, University
of California Los Angeles, Los Angeles, California 90095, United States
| | - Shan Huang
- Department
of Materials Science and Engineering, University
of California Los Angeles, Los Angeles, California 90095, United States
| | - Byoung Hoon Min
- Department
of Medicine, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul 135-710, Korea
| | - Ji Young An
- Department
of Medicine, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul 135-710, Korea
| | - Kyoung Mee Kim
- Department
of Pathology and Translational Genomics, Sungkyunkwan University School
of Medicine, Samsung Medical Center, Seoul 135-710, Korea
| | - Sung Kim
- Department
of Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul 135-710, Korea
| | - Yiqing Chen
- Department
of Bioengineering, University of California, Riverside, Riverside, California 92521, United States
| | - Huinan Liu
- Department
of Bioengineering, University of California, Riverside, Riverside, California 92521, United States
| | - Yong Kim
- UCLA
School of Dentistry, 10833 Le Conte Ave. Box 951668, Los Angeles, California 90095-1668, United States
| | - David T.W. Wong
- UCLA
School of Dentistry, 10833 Le Conte Ave. Box 951668, Los Angeles, California 90095-1668, United States
| | - Tony Jun Huang
- Department
of Mechanical Engineering and Material Science, Duke University, Durham, North Carolina 27708, United States
| | - Ya-Hong Xie
- Department
of Materials Science and Engineering, University
of California Los Angeles, Los Angeles, California 90095, United States
- . Phone: (310) 259-6946
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9
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Mateescu B, Jones JC, Alexander RP, Alsop E, An JY, Asghari M, Boomgarden A, Bouchareychas L, Cayota A, Chang HC, Charest A, Chiu DT, Coffey RJ, Das S, De Hoff P, deMello A, D’Souza-Schorey C, Elashoff D, Eliato KR, Franklin JL, Galas DJ, Gerstein MB, Ghiran IH, Go DB, Gould S, Grogan TR, Higginbotham JN, Hladik F, Huang TJ, Huo X, Hutchins E, Jeppesen DK, Jovanovic-Talisman T, Kim BY, Kim S, Kim KM, Kim Y, Kitchen RR, Knouse V, LaPlante EL, Lebrilla CB, Lee LJ, Lennon KM, Li G, Li F, Li T, Liu T, Liu Z, Maddox AL, McCarthy K, Meechoovet B, Maniya N, Meng Y, Milosavljevic A, Min BH, Morey A, Ng M, Nolan J, De Oliveira Junior GP, Paulaitis ME, Phu TA, Raffai RL, Reátegui E, Roth ME, Routenberg DA, Rozowsky J, Rufo J, Senapati S, Shachar S, Sharma H, Sood AK, Stavrakis S, Stürchler A, Tewari M, Tosar JP, Tucker-Schwartz AK, Turchinovich A, Valkov N, Van Keuren-Jensen K, Vickers KC, Vojtech L, Vreeland WN, Wang C, Wang K, Wang Z, Welsh JA, Witwer KW, Wong DT, Xia J, Xie YH, Yang K, Zaborowski MP, Zhang C, Zhang Q, Zivkovic AM, Laurent LC. Phase 2 of extracellular RNA communication consortium charts next-generation approaches for extracellular RNA research. iScience 2022; 25:104653. [PMID: 35958027 PMCID: PMC9358052 DOI: 10.1016/j.isci.2022.104653] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The extracellular RNA communication consortium (ERCC) is an NIH-funded program aiming to promote the development of new technologies, resources, and knowledge about exRNAs and their carriers. After Phase 1 (2013-2018), Phase 2 of the program (ERCC2, 2019-2023) aims to fill critical gaps in knowledge and technology to enable rigorous and reproducible methods for separation and characterization of both bulk populations of exRNA carriers and single EVs. ERCC2 investigators are also developing new bioinformatic pipelines to promote data integration through the exRNA atlas database. ERCC2 has established several Working Groups (Resource Sharing, Reagent Development, Data Analysis and Coordination, Technology Development, nomenclature, and Scientific Outreach) to promote collaboration between ERCC2 members and the broader scientific community. We expect that ERCC2's current and future achievements will significantly improve our understanding of exRNA biology and the development of accurate and efficient exRNA-based diagnostic, prognostic, and theranostic biomarker assays.
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Affiliation(s)
- Bogdan Mateescu
- Brain Research Institute, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
- Institute for Chemical and Bioengineering, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland
| | - Jennifer C. Jones
- Laboratory of Pathology Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | | | - Eric Alsop
- Neurogenomics Division, TGen, Phoenix, AZ 85004, USA
| | - Ji Yeong An
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Mohammad Asghari
- Institute for Chemical and Bioengineering, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland
| | - Alex Boomgarden
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Laura Bouchareychas
- Department of Surgery, Division of Vascular and Endovascular Surgery, University of California, San Francisco, San Francisco, CA 94143, USA
- Northern California Institute for Research and Education, San Francisco, CA 94121, USA
| | - Alfonso Cayota
- Functional Genomics Unit, Institut Pasteur de Montevideo, Montevideo 11400, Uruguay
- University Hospital, Universidad de la República, Montevideo 11600, Uruguay
| | - Hsueh-Chia Chang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Al Charest
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Daniel T. Chiu
- Department of Chemistry and Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Robert J. Coffey
- Department of Medicine/Gastroenterology and Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37235, USA
| | - Saumya Das
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
| | - Peter De Hoff
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, San Diego, CA 92093, USA
| | - Andrew deMello
- Institute for Chemical and Bioengineering, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland
| | | | - David Elashoff
- Statistics Core, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Kiarash R. Eliato
- Department of Molecular Medicine, Beckman Research Institute of the City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA
| | - Jeffrey L. Franklin
- Department of Medicine/Gastroenterology and Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37235, USA
| | - David J. Galas
- Pacific Northwest Research Institute, Seattle, WA 98122, USA
| | - Mark B. Gerstein
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA
- Program in Computational Biology & Bioinformatics, Yale University, New Haven, CT 06520, USA
- Department of Computer Science, Yale University, New Haven, CT 06520, USA
| | - Ionita H. Ghiran
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - David B. Go
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Stephen Gould
- Department of Biological Chemistry, The Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA
| | - Tristan R. Grogan
- Department of Medicine Statistics Core, David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, CA, USA
| | - James N. Higginbotham
- Department of Medicine/Gastroenterology and Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Florian Hladik
- Departments of Obstetrics and Gynecology, and Medicine, University of Washington, Seattle, WA, USA
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Tony Jun Huang
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
| | - Xiaoye Huo
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | | | - Dennis K. Jeppesen
- Department of Medicine/Gastroenterology and Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Tijana Jovanovic-Talisman
- Department of Molecular Medicine, Beckman Research Institute of the City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA
| | - Betty Y.S. Kim
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Sung Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Kyoung-Mee Kim
- Department of Pathology & Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Yong Kim
- Department of Oral Biology and Medicine, UCLA School of Dentistry, Los Angeles, CA 90095, USA
| | - Robert R. Kitchen
- Corrigan Minehan Heart Center and Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Vaughan Knouse
- Laboratory of Pathology Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Emily L. LaPlante
- Bioinformatics Research Laboratory, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | | | - L. James Lee
- Department of Chemical and Biomolecular Engineering and Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Kathleen M. Lennon
- Department of Molecular Medicine, Beckman Research Institute of the City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA
| | - Guoping Li
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
| | - Feng Li
- Department of Oral Biology and Medicine, UCLA School of Dentistry, Los Angeles, CA 90095, USA
| | - Tieyi Li
- Department of Materials Science & Engineering, University of California Los Angeles, Los Angeles, CA 90095-1595, USA
| | - Tao Liu
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Zirui Liu
- Department of Materials Science & Engineering, University of California Los Angeles, Los Angeles, CA 90095-1595, USA
| | - Adam L. Maddox
- Department of Molecular Medicine, Beckman Research Institute of the City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA
| | - Kyle McCarthy
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | | | - Nalin Maniya
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Yingchao Meng
- Institute for Chemical and Bioengineering, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland
| | - Aleksandar Milosavljevic
- Bioinformatics Research Laboratory, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
- Program in Quantitative and Computational Biosciences Baylor College of Medicine, Houston, TX 77030, USA
| | - Byoung-Hoon Min
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Seoul, South Korea
| | - Amber Morey
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, San Diego, CA 92093, USA
| | - Martin Ng
- Northern California Institute for Research and Education, San Francisco, CA 94121, USA
| | - John Nolan
- Scintillon Institute, San Diego, CA, USA
| | | | - Michael E. Paulaitis
- Center for Nanomedicine at the Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Tuan Anh Phu
- Northern California Institute for Research and Education, San Francisco, CA 94121, USA
| | - Robert L. Raffai
- Department of Surgery, Division of Vascular and Endovascular Surgery, University of California, San Francisco, San Francisco, CA 94143, USA
- Northern California Institute for Research and Education, San Francisco, CA 94121, USA
- Department of Veterans Affairs, Surgical Service (112G), San Francisco VA Medical Center, San Francisco, CA 94121, USA
| | - Eduardo Reátegui
- Department of Chemical and Biomolecular Engineering and Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Matthew E. Roth
- Bioinformatics Research Laboratory, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | | | - Joel Rozowsky
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA
| | - Joseph Rufo
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
| | - Satyajyoti Senapati
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Sigal Shachar
- Meso Scale Diagnostics, LLC, Rockville, MD 20850, USA
| | - Himani Sharma
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Anil K. Sood
- Department of Gynecologic Oncology & Reproductive Medicine, University of Texas MD Aderson Cancer Center, Houston, TX 77030, USA
| | - Stavros Stavrakis
- Institute for Chemical and Bioengineering, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland
| | - Alessandra Stürchler
- Brain Research Institute, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
- Institute for Chemical and Bioengineering, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland
| | - Muneesh Tewari
- Department of Internal Medicine, Hematology/Oncology Division, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
- Rogel Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
| | - Juan P. Tosar
- Functional Genomics Unit, Institut Pasteur de Montevideo, Montevideo 11400, Uruguay
- Analytical Biochemistry Unit, School of Science, Universidad de la República, Montevideo 11400, Uruguay
| | | | - Andrey Turchinovich
- Cancer Genome Research (B063), German Cancer Research Center DKFZ, Heidelberg 69120, Germany
- Heidelberg Biolabs GmbH, Heidelberg 69120, Germany
| | - Nedyalka Valkov
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
| | | | - Kasey C. Vickers
- Department of Medicine, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Lucia Vojtech
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA 98195, USA
| | - Wyatt N. Vreeland
- Bioprocess Measurement Group, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Ceming Wang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Kai Wang
- Institute for Systems Biology, Seattle, WA 98109, USA
| | - ZeYu Wang
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
| | - Joshua A. Welsh
- Laboratory of Pathology Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Kenneth W. Witwer
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - David T.W. Wong
- Department of Oral Biology and Medicine, UCLA School of Dentistry, Los Angeles, CA 90095, USA
| | - Jianping Xia
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
| | - Ya-Hong Xie
- Department of Materials Science & Engineering, University of California Los Angeles, Los Angeles, CA 90095-1595, USA
| | - Kaichun Yang
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA
| | - Mikołaj P. Zaborowski
- Department of Gynecology, Obstetrics and Gynecologic Oncology, Division of Gynecologic Oncology, Poznan University of Medical Sciences, 60-535 Poznań, Poland
| | - Chenguang Zhang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Qin Zhang
- Department of Medicine/Gastroenterology and Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | | | - Louise C. Laurent
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, La Jolla, San Diego, CA 92093, USA
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10
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Cheng J, Morselli M, Huang WL, Heo YJ, Pinheiro-Ferreira T, Li F, Wei F, Chia D, Kim Y, He HJ, Cole KD, Su WC, Pellegrini M, Wong DT. Plasma contains ultrashort single-stranded DNA in addition to nucleosomal cell-free DNA. iScience 2022; 25:104554. [PMID: 35800774 PMCID: PMC9254344 DOI: 10.1016/j.isci.2022.104554] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 04/25/2022] [Accepted: 06/02/2022] [Indexed: 12/28/2022] Open
Abstract
Plasma cell-free DNA is being widely explored as a biomarker for clinical screening. Currently, methods are optimized for the extraction and detection of double-stranded mononucleosomal cell-free DNA of ∼160bp in length. We introduce uscfDNA-seq, a single-stranded cell-free DNA next-generation sequencing pipeline, which bypasses previous limitations to reveal a population of ultrashort single-stranded cell-free DNA in human plasma. This species has a modal size of 50nt and is distinctly separate from mononucleosomal cell-free DNA. Treatment with single-stranded and double-stranded specific nucleases suggests that ultrashort cell-free DNA is primarily single-stranded. It is distributed evenly across chromosomes and has a similar distribution profile over functional elements as the genome, albeit with an enrichment over promoters, exons, and introns, which may be suggestive of a terminal state of genome degradation. The examination of this cfDNA species could reveal new features of cell death pathways or it can be used for cell-free DNA biomarker discovery.
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Affiliation(s)
- Jordan Cheng
- School of Dentistry, University of California, Los Angeles, CA 90095, USA
| | - Marco Morselli
- Department of Molecular, Cellular & Developmental Biology, University of California, Los Angeles, CA 90095, USA
| | - Wei-Lun Huang
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 704, Taiwan
| | - You Jeong Heo
- School of Dentistry, University of California, Los Angeles, CA 90095, USA
- The Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06355, Republic of Korea
| | | | - Feng Li
- School of Dentistry, University of California, Los Angeles, CA 90095, USA
| | - Fang Wei
- School of Dentistry, University of California, Los Angeles, CA 90095, USA
| | - David Chia
- Department of Pathology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
| | - Yong Kim
- School of Dentistry, University of California, Los Angeles, CA 90095, USA
| | - Hua-Jun He
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Kenneth D. Cole
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Wu-Chou Su
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 704, Taiwan
| | - Matteo Pellegrini
- Department of Molecular, Cellular & Developmental Biology, University of California, Los Angeles, CA 90095, USA
| | - David T.W. Wong
- School of Dentistry, University of California, Los Angeles, CA 90095, USA
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11
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Lin A, Manral N, McElhinney P, Killekar A, Matsumoto H, Cadet S, Achenbach S, Nicholls SJ, Wong DT, Berman D, Dweck M, Newby DE, Williams MC, Slomka PJ, Dey D. Deep learning-based plaque quantification from coronary computed tomography angiography: external validation and comparison with intravascular ultrasound. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0161] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Atherosclerotic plaque quantification from coronary computed tomography angiography (CTA) enables accurate assessment of coronary artery disease burden, progression, and prognosis. However, quantitative plaque analysis is time-consuming and requires high expertise. We sought to develop and externally validate an artificial intelligence (AI)-based deep learning (DL) approach for CTA-derived measures of plaque volume and stenosis severity. We compared the performance of DL to expert readers and the gold standard of intravascular ultrasound (IVUS).
Methods
This was a multicenter study of patients undergoing coronary CTA at 11 sites, with software-based quantitative plaque measurements performed at a per-lesion level by expert readers. AI-based plaque analysis was performed by a DL novel convolutional neural network which automatically segmented the coronary artery wall, lumen, and plaque for the computation of plaque volume and stenosis severity. Using expert measurements as ground truth, the DL algorithm was trained on 887 patients (4,686 lesions). Thereafter, the algorithm was applied to an independent test set of 221 patients (1,234 lesions), which included an external validation cohort of 171 patients from the SCOT-HEART (Scottish Computed Tomography of the Heart) trial as well as 50 patients who underwent IVUS within one month of CTA. We report the performance of AI-based plaque analysis in the independent test set.
Results
Within the external validation cohort, there was excellent agreement between DL and expert reader measurements of total plaque volume (intraclass correlation coefficient [ICC] 0.876), noncalcified plaque volume (ICC 0.869), and percent diameter stenosis (ICC 0.850; all p<0.001). When compared with IVUS, there was excellent agreement for DL total plaque volume (ICC 0.945), total plaque burden (ICC 0.853), minimal luminal area (ICC 0.864), and percent area stenosis (ICC 0.805; all p<0.001); with strong correlation between DL and IVUS for total plaque volume (r=0.915; p<0.001; Figure). The average DL plaque analysis time was 20 seconds per patient, compared with 25–30 minutes taken by experts.
Conclusions
AI-based plaque quantification from coronary CTA using an externally validated DL approach enables rapid measurements of plaque volume and stenosis severity in close agreement with expert readers and IVUS.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): National Heart, Lung, and Blood Institute, United States
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Affiliation(s)
- A Lin
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - N Manral
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - P McElhinney
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - A Killekar
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - H Matsumoto
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - S Cadet
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - S Achenbach
- Friedrich Alexander University, Erlangen, Germany
| | | | - D T Wong
- Monash Heart, Melbourne, Australia
| | - D Berman
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - M Dweck
- University of Edinburgh, Edinburgh, United Kingdom
| | - D E Newby
- University of Edinburgh, Edinburgh, United Kingdom
| | - M C Williams
- University of Edinburgh, Edinburgh, United Kingdom
| | - P J Slomka
- Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - D Dey
- Cedars-Sinai Medical Center, Los Angeles, United States of America
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12
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Abstract
We used a noninvasive electrochemical quantitative assay for IgG antibodies to SARS-CoV-2 S1 in saliva to investigate the kinetics of antibody response in a community-based population who had received either the Pfizer or Moderna mRNA-based vaccines. Samples were received from a total of 97 individuals including a subset of 42 individuals who collected samples twice-weekly for 3 months or longer. In all, 840 samples were collected and analyzed. In all individuals, salivary antibody levels rose sharply in the 2-week period following their second vaccination, with peak antibody levels being at 10–20 days post-vaccination. We observed that 20%, 10% and 2.4% of individuals providing serial samples had a 90%, 95%, and 99% drop respectively from peak levels during the duration of monitoring and two patients fell to pre-vaccination levels (5%). The use of non-invasive quantitative salivary antibody measurement can allow widespread, cost-effective monitoring of vaccine response. COVID-19 antibodies were measured in saliva and 20% of vaccinated subjects experienced a 90% drop in peak antibody levels over the course of monitoring.
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13
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Boucher MC, Qian J, Brent MH, Wong DT, Sheidow T, Duval R, Kherani A, Dookeran R, Maberley D, Samad A, Chaudhary V. Evidence-based Canadian guidelines for tele-retina screening for diabetic retinopathy: recommendations from the Canadian Retina Research Network (CR2N) Tele-Retina Steering Committee. Can J Ophthalmol 2021; 55:14-24. [PMID: 32089161 DOI: 10.1016/j.jcjo.2020.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/27/2019] [Accepted: 01/02/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The purpose of this report is to develop a consensus for Canadian national guidelines specific to a tele-medicine approach to screening for diabetic retinopathy (DR) using evidence-based and clinical data. METHODS Canadian Tele-Screening Grading Scales for DR and diabetic macular edema (DME) were created primarily based on severity grading scales outlined by the International Clinical Diabetic Retinopathy Disease Severity Scale (ICDR) and the Scottish DR Grading Scheme 2007. Other grading scales used in international screening programs and the clinical expertise of the Canadian Retina Research Network members and retina specialists nationwide were also used in the creation of the guidelines. RESULTS National Tele-Screening Guidelines for DR and DME with and without optical coherence tomography (OCT) images are proposed. These outline a diagnosis and management algorithm for patients presenting with different stages of DR and/or DME. General guidelines detailing the requirements for imaged retina fields, image quality, quality control, and follow-up care and the role of visual acuity, pupil dilation, OCT, ultra-wide-field imaging, and artificial intelligence are discussed. CONCLUSIONS Tele-retina screening can help to address the need for timely and effective screening for DR, whose prevalence continues to rise. A standardized and evidence-based national approach to DR tele-screening has been proposed, based on DR/DME grading using two 45° image fields or a single widefield or ultra-wide-field image, preferable use of OCT imaging, and a focus on local quality control measures.
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Affiliation(s)
- M C Boucher
- Centre universitaire d'ophtalmologie (CUO)-Hôpital Maisonneuve-Rosemont, Département d'ophtalmologie, Université de Montréal, Montréal, Qué
| | - J Qian
- Hamilton Regional Eye Institute, St. Joseph's Healthcare Hamilton, Division of Ophthalmology, Department of Surgery, McMaster University, Hamilton, Ont.; Department of Ophthalmology & Vision Sciences, University of Toronto, Toronto, Ont
| | - M H Brent
- Department of Ophthalmology & Vision Sciences, University of Toronto, Toronto, Ont.; Department of Ophthalmology, University Health Network-Donald K. Johnson Eye Institute, Toronto Western Hospital, Toronto, Ont
| | - D T Wong
- Department of Ophthalmology & Vision Sciences, University of Toronto, Toronto, Ont.; Department of Ophthalmology, Unity Health Toronto-St. Michael's Hospital, Toronto, Ont
| | - T Sheidow
- Department of Ophthalmology, Ivey Eye Institute-St. Joseph's Hospital, London, Ont
| | - R Duval
- Centre universitaire d'ophtalmologie (CUO)-Hôpital Maisonneuve-Rosemont, Département d'ophtalmologie, Université de Montréal, Montréal, Qué
| | - A Kherani
- Southern Alberta Eye Center, Calgary Retina Consultants, Calgary, Alta
| | - R Dookeran
- Misericordia Health Centre, University of Manitoba, Winnipeg, Man
| | - D Maberley
- Department of Ophthalmology & Visual Sciences, Eye Care Centre-Vancouver General Hospital, Vancouver, B.C
| | - A Samad
- Department of Ophthalmology & Visual Sciences, Dalhousie University, Halifax, N.S
| | - V Chaudhary
- Hamilton Regional Eye Institute, St. Joseph's Healthcare Hamilton, Division of Ophthalmology, Department of Surgery, McMaster University, Hamilton, Ont..
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14
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Xiao H, Langerman A, Zhang Y, Khalid O, Hu S, Cao CX, Lingen MW, Wong DT. Quantitative proteomic analysis of microdissected oral epithelium for cancer biomarker discovery. Oral Oncol 2015; 51:1011-1019. [DOI: 10.1016/j.oraloncology.2015.08.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 08/11/2015] [Accepted: 08/13/2015] [Indexed: 10/23/2022]
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15
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Schafer CA, Schafer JJ, Yakob M, Lima P, Camargo P, Wong DT. Saliva Diagnostics: Utilizing Oral Fluids to Determine Health Status. Monographs in Oral Science 2014; 24:88-98. [DOI: 10.1159/000358791] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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16
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Psaltis PJ, Spoon DB, Wong DT. Utility of mesenchymal stromal cells for myocardial infarction. Transitioning from bench to bedside. Minerva Cardioangiol 2013; 61:639-663. [PMID: 24253457] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Amongst experimental therapies being evaluated for myocardial infarction (MI), the field of cellular cardiomyoplasty still provokes much excitement, well into its second decade of investigation. Mesenchymal stromal/stem cells (MSCs) have held a particularly enduring place as one of the mainstays of adult-derived stem cell research in cardiovascular disease. These rare, non-hematopoietic cells are natively present throughout different postnatal tissues, most famously bone marrow, where they typically participate in perivascular stem cell niches and play key supportive and trophic roles. Their application for exogenous stem cell delivery is made attractive by their ease of isolation, proclivity for ex vivo expansion and potential for allogeneic use. There is now a remarkable wealth of in vitro and animal-based evidence attesting to the ability of MSCs to safely augment cardiac repair post-MI through pleiotropic mechanisms that continue to be delineated and in turn, optimised. However, despite such preclinical promise and the encouraging results of preliminary experience in human patients, the broader translation of MSCs to the clinical cardiovascular realm requires much more refinement to overcome fundamental limitations, not to mention rigorous validation to resolve lingering areas of uncertainty. Here we review the basic biological properties that have made MSCs so widely investigated for cardiovascular repair, discuss the preclinical evidence for their efficacy and purported mechanisms of action and consider the practicalities and evidence for their use in human patients with MI and cardiomyopathy.
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Affiliation(s)
- P J Psaltis
- Department of Medicine University of Adelaide, Adelaide South Australia, Australia -
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17
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Richardson JD, Bertaso AG, Frost L, Psaltis PJ, Carbone A, Koschade B, Wong DT, Nelson AJ, Paton S, Williams K, Azarisman S, Worthley MI, Teo KS, Gronthos S, Zannettino ACW, Worthley SG. Cardiac magnetic resonance, transthoracic and transoesophageal echocardiography: a comparison of in vivo assessment of ventricular function in rats. Lab Anim 2013; 47:291-300. [PMID: 23836849 DOI: 10.1177/0023677213494373] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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: 11/15/2022]
Abstract
In vivo assessment of ventricular function in rodents has largely been restricted to transthoracic echocardiography (TTE). However 1.5 T cardiac magnetic resonance (CMR) and transoesophageal echocardiography (TOE) have emerged as possible alternatives. Yet, to date, no study has systematically assessed these three imaging modalities in determining ejection fraction (EF) in rats. Twenty rats underwent imaging four weeks after surgically-induced myocardial infarction. CMR was performed on a 1.5 T scanner, TTE was conducted using a 9.2 MHz transducer and TOE was performed with a 10 MHz intracardiac echo catheter. Correlation between the three techniques for EF determination and analysis reproducibility was assessed. Moderate-strong correlation was observed between the three modalities; the greatest between CMR and TOE (intraclass correlation coefficient (ICC) = 0.89), followed by TOE and TTE (ICC = 0.70) and CMR and TTE (ICC = 0.63). Intra- and inter-observer variations were excellent with CMR (ICC = 0.99 and 0.98 respectively), very good with TTE (0.90 and 0.89) and TOE (0.87 and 0.84). Each modality is a viable option for evaluating ventricular function in rats, however the high image quality and excellent reproducibility of CMR offers distinct advantages even at 1.5 T with conventional coils and software.
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Affiliation(s)
- J D Richardson
- Cardiovascular Research Centre, Royal Adelaide Hospital and Department of Medicine, University of Adelaide, South Australia, Australia
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18
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Wei F, Yang J, Wong DT. Detection of exosomal biomarker by electric field-induced release and measurement (EFIRM). Biosens Bioelectron 2013; 44:115-21. [PMID: 23402739 PMCID: PMC3809103 DOI: 10.1016/j.bios.2012.12.046] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [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: 09/18/2012] [Revised: 12/04/2012] [Accepted: 12/20/2012] [Indexed: 12/30/2022]
Abstract
Exosomes biomarkers mediating important biological process, especially in the systemic disease diagnostics and therapeutics, yet the protective exosomal vesicle structure hinders rapid, simple detection of the harbored molecules. We have established a new method, the electric field-induced release and measurement (EFIRM), which can simultaneously disrupt exosomes to release the contents and on-site monitoring the harbored exosomal RNA/proteins biomarkers. When exposed to a non-uniform electrical field, exosomal RNA and proteins are rapidly released. Bio-recognition of these biomolecules is carried out concurrently. We tested the hypothesis that the lung cancer cell line, H460 stably transfected with hCD63-GFP, would shed hCD63-GFP expressing exosomes that could be detected in serum and saliva. We confirmed in vivo that H460-CD63-GFP shed exosomes were transported to blood and saliva. This result demonstrates for the first time tumor-shed exosomes were detected in saliva, in addition to blood, presenting a new translational utility of exosome-based biomarker detection in saliva.
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Affiliation(s)
| | | | - David T.W. Wong
- UCLA School of Dentistry, UCLA Dental Research Institute, 73-017 Center for Health Sciences, 10833 Le Conte Ave., University of California, Los Angeles, CA 90095-1668, USA
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Wong DT, Tam AD, Van Zundert TCRV. The usage of the Boussignac continuous positive airway pressure system in acute respiratory failure. Minerva Anestesiol 2013; 79:564-570. [PMID: 23419338] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Traditionally, continuous positive airway pressure (CPAP) and bilevel positive airway pressure (BiPAP) devices have been used to treat patients in acute respiratory failure. However they require an electric power source, are relatively large in size, and may be difficult to use in prehospital settings. The recently introduced Boussignac CPAP system is capable of delivering 10 cmH2O of CPAP, is compact, portable and requires only an oxygen source. This paper reviews the efficacy of using Boussignac CPAP as a treatment for acute respiratory failure in both prehospital and hospital settings. All studies mainly focused on patients treated for cardiogenic pulmonary edema. In the prehospital setting, Boussigac CPAP significantly improved respiratory parameters and oxygenation from baseline values. In the emergency department setting, Boussignac CPAP was more effective than standard oxygen delivery and just as effective as BiPAP in improving patient oxygenation and respiration. In one study, implementing Boussignac CPAP reduced intubation rate and hospital stay. Most hospital staff found Boussignac CPAP easy to use and complication rates were low. Boussigac CPAP is a useful device in the treatment of patients with acute respiratory failure, especially in the prehospital setting.
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Affiliation(s)
- D T Wong
- Department of Anesthesia, Toronto Western Hospital, University of Toronto, ON, M5T 2S8, Canada.
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Ye L, Wong DT, Liu J, Zhu T. Mallampati class does not affect the success rate of intubation through an intubating laryngeal mask airway with reverse tracheal tube direction. Minerva Anestesiol 2013; 79:227-231. [PMID: 23174918] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND The aim of this paper was to assess whether the Mallampati class can affect the success rate of intubation through an intubating laryngeal mask airway (ILMA) with a reverse conventional tracheal tube direction. METHODS Two-hundred ASA I-II adults, 100 patients with Mallampati class 1 or 2 (MP12) and 100 with Mallampati class 3 or 4 (MP34) undergoing elective surgery under general anesthesia were enrolled. All the patients were intubated through the ILMA with a reverse conventional tracheal tube direction. Tracheal intubation was considered successful if proper tracheal positioning was attained within three attempts. Chi-Square analysis was used to compare categorical variables between the two groups. RESULTS Tracheal intubation was successful in 186 of 200 patients (93.0%): 169 (84.5%) at the first attempt. Fourteen (7.0%) had to be intubated using direct laryngoscope. Both the first attempt success rate and overall success rate were similar between the MP12 and MP34 groups (84.0 vs. 85.0%, P=0.845 and 93.0 vs. 93.0%, respectively). CONCLUSION Tracheal intubation was successful in 93.0% of patients through an ILMA with a reverse conventional tracheal tube. Mallampati class did not affect the success rate of intubation.
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Affiliation(s)
- L Ye
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
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21
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Halgand F, Zabrouskov V, Bassilian S, Souda P, Loo JA, Faull KF, Wong DT, Whitelegge JP. Defining intact protein primary structures from saliva: a step toward the human proteome project. Anal Chem 2012; 84:4383-95. [PMID: 22509742 DOI: 10.1021/ac203337s] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Top-down mass spectrometry has been used to investigate structural diversity within some abundant salivary protein families. In this study, we report the identification of two isoforms of protein II-2 which differed in mass by less than 1 Da, the determination of a sequence for protein IB8a that was best satisfied by including a mutation and a covalent modification in the C-terminal part, and the assignment of a sequence of a previously unreported protein of mass 10433 Da. The final characterization of Peptide P-J was achieved, and the discovery of a truncated form of this peptide was reported. The first sequence assignment was done at low resolution using a hybrid quadrupole time-of-flight instrument to quickly identify and characterize proteins, and data acquisition was switched to Fourier-transform ion cyclotron resonance (FTICR) for proteins that required additional sequence coverage and certainty of assignment. High-resolution and high mass accuracy mass spectrometry on a FTICR-mass spectrometry (MS) instrument combined with electron-capture dissociation (ECD) provided the most informative data sets, with the more frequent presence of "unique" ions that unambiguously define the primary structure. A mixture of predictable and unusual post-translational modifications in the protein sequence precluded the use of shotgun-annotated databases at this stage, requiring manual iterations of sequence refinement in many cases. This led us to propose guidelines for an iterative processing workflow of MS and MSMS data sets that allow researchers to completely assign the identity and the structure of a protein.
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Affiliation(s)
- F Halgand
- NPI-Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California 90024, United States.
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Xiao H, Wong DT. Method development for proteome stabilization in human saliva. Anal Chim Acta 2012; 722:63-9. [DOI: 10.1016/j.aca.2012.02.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 01/18/2012] [Accepted: 02/12/2012] [Indexed: 12/22/2022]
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Xiao H, Wong DT. Proteomic analysis of microvesicles in human saliva by gel electrophoresis with liquid chromatography-mass spectrometry. Anal Chim Acta 2012; 723:61-7. [DOI: 10.1016/j.aca.2012.02.018] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 02/07/2012] [Accepted: 02/11/2012] [Indexed: 01/13/2023]
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Abstract
In all, 350,000 new cases of oral cancer are reported annually worldwide, 35,000 of these occur in the United States. For decades, the 5-year survival rate has remained low at only 60%, which is mainly due to cancer diagnosis at late and progressed stage. Using saliva as a diagnostic medium could be the key for early detection and thus improved survival rates. Among all salivary constituents, the transcriptome has turned out to be a highly promising biomarker source. So far, seven mRNA and two microRNA markers were found to be discriminatory in saliva of oral cancer patients. This review will give an overview on the field of salivary transcriptome research with focus on oral cancer detection as well as the translation of salivary diagnostics into clinical reality.
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Abstract
For the past two decades, salivary diagnostic approaches have been developed to monitor oral diseases such as periodontal diseases and to assess caries risk. Recently, the combination of emerging biotechnologies and salivary diagnostics has extended the range of saliva-based diagnostics from the oral cavity to the whole physiologic system as most compounds found in blood are also present in saliva. Accordingly, saliva can reflect the physiologic state of the body, including emotional, endocrinal, nutritional and metabolic variations and acts as a source for the monitoring of oral and also systemic health. This review presents an update on the status of saliva diagnostics and delves into their applications to the discovery of biomarkers for cancer detection and therapeutic applications. Translating scientific findings of nucleic acids, proteins and metabolites in body fluids to clinical applications is a cumbersome and challenging journey. Our research group is pursuing the biology of salivary analytes and the development of technologies for detection of distinct biomarkers with high sensitivity and specificity. The avenue of saliva diagnostics incorporating transcriptomic, proteomic and metabolomic findings will enable us to connect salivary molecular analytes to monitor therapies, therapeutic outcomes, and finally disease progression in cancer.
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Affiliation(s)
- N Spielmann
- School of Dentistry and Dental Research Institute, University of California at Los Angeles, Los Angeles, CA, USA.
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Abstract
The protein compositions, or the proteomes, found in human salivary and plasma fluids are compared. From recent experimental work by many laboratories, a catalogue of 2290 proteins found in whole saliva has been compiled. This list of salivary proteins is compared with the 2698 proteins found in plasma. Approximately 27% of the whole-saliva proteins are found in plasma. However, despite this apparent low degree of overlap, the distribution found across Gene Ontological categories, such as molecular function, biological processes, and cellular components, shows significant similarities. Moreover, nearly 40% of the proteins that have been suggested to be candidate markers for diseases such as cancer, cardiovascular disease, and stroke can be found in whole saliva. These comparisons and correlations should encourage researchers to consider the use of saliva to discover new protein markers of disease and as a diagnostic non-proximal fluid to detect early signs of disease throughout the body.
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Affiliation(s)
- J A Loo
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, CA, USA
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Vermelis AM, Mateijsen N, Giebelen D, Meeusen V, Wong DT, van Zundert AAJ. Successful use of videolaryngoscopy in an adult patient with acute epiglottitis: a case report. Acta Anaesthesiol Belg 2010; 61:67-70. [PMID: 21155440] [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: 05/30/2023]
Abstract
Acute epiglottitis is a potentially life-threatening infection of the supraglottic structures, which can lead to sudden, fatal airway obstruction. Different techniques have been described to facilitate tracheal intubation in acute epiglottitis. We describe the successful intubation, with the help of the videolaryngoscope, of a 60-year-old female with acute epiglottitis. On admission the patient was ill and severely distressed, sitting in the upright position, drooling saliva, showing severe inspiratory stridor, hyperventilation, but no trismus. Intubation was performed in OR conditions with difficult intubation equipment including fiberoptic bronchoscope, videolaryngscope, laryngeal mask airway and surgical tracheostomy ready for use. After pre-oxygenation for three minutes with 100% oxygen with the patient still in the sitting position, induction was performed with 250 mg propofol i.v. The patient was subsequently positioned supine. Face mask ventilation was successful with capnographic tracing and 100 mg succinylcholine was administered. Videolaryngoscopy was performed and a red, swollen epiglottitis with pin point lumen was seen. Intubation with a 5 mm microlarynx tube was successful at the first attempt. This is the first case describing intubation using videolaryngoscopy in an adult patient with acute epiglottitis. Videolaryngoscopy has already proven to be an excellent intubation device in normal and difficult airways. Direct laryngoscopy in patients with epiglottitis may be difficult due to the swelling and distortion of the airway. This case report shows that videolaryngoscopy is a good alternative intubation device option in adults with acute epiglottitis. Nevertheless, all other precautions (difficult airway trolley, surgical tracheostomy) need to be ready for immediate use.
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Affiliation(s)
- A M Vermelis
- Department of Anesthesiology, Intensive Care and Pain Therapy, Catharina Hospital-Brabant Medical School, Eindhoven, The Netherlands
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Abstract
The ability to monitor health status, disease onset and progression, and treatment outcome through non-invasive means is a most desirable goal in the health care promotion and delivery. There are three prerequisites to materialize this goal: specific biomarkers associated with a health or disease state; a non-invasive approach to detect and monitor the biomarkers; and the technologies to discriminate the biomarkers. A national initiative catalyzed by the National Institute of Dental & Craniofacial Research (NIDCR) has created a roadmap to achieve these goals through the use of oral fluids as the diagnostic medium to scrutinize the health and/or disease status of individuals. Progress has shown this is an ideal opportunity to bridge state of the art saliva-based biosensors, optimized to disease discriminatory salivary biomarkers, for diagnostic applications. Oral fluid being the 'mirror of body' is a perfect medium to be explored for health and disease surveillance. The translational applications and opportunities are enormous.
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Affiliation(s)
- J M Lee
- UCLA Lung Cancer Research Program, Division of Cardiothoracic Surgery, University of California Los Angeles, Los Angeles, CA 90095, USA
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29
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Arellano-Garcia ME, Hu S, Wang J, Henson B, Zhou H, Chia D, Wong DT. Multiplexed immunobead-based assay for detection of oral cancer protein biomarkers in saliva. Oral Dis 2009; 14:705-12. [PMID: 19193200 DOI: 10.1111/j.1601-0825.2008.01488.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [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
OBJECTIVE For clinical applications of biomarkers, there is a need for multiplex assays using high throughput platforms. The objective of this study was to determine the efficacy of Luminex Multianalyte Profiling (xMAP) technology for measurement of salivary proteins and to evaluate whether multiplex assays are as effective as single-plex assays and enzyme-linked immunosorbent assay (ELISA). RESULTS The average levels of interleukin-8 (IL-8) from the single-plex assay were 3313.2 +/- 3759.8 pg ml(-1) [oral squamous cell carcinoma (OSCC), n = 20] and 1061.7 +/- 1978.8 pg ml(-1) (control, n = 20). The IL-1beta average levels from the single-plex assay were 945.2 +/- 1134.8 pg ml(-1) (OSCC, n = 20) and 314.2 +/- 444.8 pg ml(-1) (control, n = 20). The average levels of IL-8 from the multiplex assay were 2834.9 +/- 3385.6 pg ml(-1) (OSCC, n = 20) and 947.3 +/- 2036.8 pg ml(-1) (control, n = 20). The IL-1beta average levels from the multiplex assay were 1013.5 +/- 1221.1 pg ml(-1) (OSCC, n = 20) and 376.3 +/- 576.3 pg ml(-1) (control, n = 20). The correlation coefficient between Luminex and ELISA assay for IL-8 (n = 19) and IL-1beta (n = 19) was 0.91 and 0.84, respectively. CONCLUSION Luminex xMAP single-plex and multiplex assays are as effective as ELISA assays for quantification of proteins in saliva. Both IL-8 and IL-1beta were expressed at significantly higher levels in OSCC subjects than in the matched healthy control subjects.
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Affiliation(s)
- M E Arellano-Garcia
- School of Dentistry, Oral Biology and Medicine Division and Dental Research Institute, University of California Los Angeles, Los Angeles, CA, USA
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Ye L, Liu J, Wong DT, Zhu T. Effects of tracheal tube orientation on the success of intubation through an intubating laryngeal mask airway: study in Mallampati class 3 or 4 patients. Br J Anaesth 2009; 102:269-72. [PMID: 19151052 DOI: 10.1093/bja/aen365] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND We evaluated the effects of conventional tracheal tube orientation on success of intubation through an intubating laryngeal mask airway (ILMA) in Mallampati class 3 or 4 patients. METHODS Two hundred adults, ASA I-II, Mallampati class 3 or 4, undergoing elective surgery under general anaesthesia were enrolled. All the patients were randomly allocated to either normal or reverse group based on the orientation of the tracheal tube as it was initially inserted into the ILMA. Tracheal intubation was considered successful, if proper tracheal positioning was attained within three insertion attempts. chi(2) analysis was used to compare categorical variables. RESULTS Tracheal intubation through the ILMA was successful in 183 of 200 patients (91.5%): 157 (78.5%) on the first attempt. Seventeen (8.5%) were intubated using direct laryngoscopy. The first-attempt success rate was higher in the reverse than in the normal group (85.0% vs 72.0%, P=0.025), although the overall success rate was similar between the reverse and the normal groups (93.0% vs 90.0%). The incidence of sore throat was comparable in the normal group and the reverse group (22.0% vs 12.0%, NS). CONCLUSIONS Overall, tracheal intubation was successful in 91.5% of patients through an ILMA with a conventional tracheal tube in Mallampati class 3 or 4 patients. The first-attempt success rate was higher in the reverse group compared with the normal group, but the overall success rate was similar between the reverse and the normal groups.
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Affiliation(s)
- L Ye
- Department of Anaesthesiology, West China Hospital, Sichuan University, Chengdu Sichuan Province 610041, People's Republic of China
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31
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Abstract
Human saliva contains thousands of mRNAs, some of which have translational value as diagnostic markers for human diseases. We have found that more than 30% of the mRNAs detected in human saliva contain AU-rich elements (ARE) in their 3' untranslated regions (3'UTR). Since AREs are known to contribute to RNA turnover by forming complexes with ARE-binding proteins, we hypothesized that salivary mRNA stability is mediated by ARE-binding proteins in human saliva. To test this hypothesis, we monitored the in vitro degradation of a radiolabeled ARE-containing salivary mRNA (IL-8) in salivary protein extracts. The degradation of IL-8 mRNA was accelerated by competition for saliva ARE-binding proteins through the addition of excess unlabeled IL-8 mRNA fragments containing 4 tandem AREs. UV cross-linking and immunoprecipitation experiments revealed 2 ARE-binding proteins, AUF1 and HuR, associated with IL-8 mRNA in saliva. These results demonstrate that ARE-binding proteins contribute to the stability of ARE mRNAs in human saliva.
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Affiliation(s)
- V Palanisamy
- School of Dentistry and Dental Research Institute, University of California Los Angeles, Los Angeles, CA 90095-1668, USA
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32
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Abstract
The dysregulation of the molecular events governing cell cycle control is emerging as a central theme of oral carcinogenesis. Regulatory pathways responding to extracellular signaling or intracellular stress and DNA damage converge on the cell cycle apparatus. Abrogation of mitogenic and anti-mitogenic response regulatory proteins, such as the retinoblastoma tumor suppressor protein (pRB), cyclin D1, cyclin-dependent kinase (CDK) 6, and CDK inhibitors (p21(WAF1/CIP1), p27(KIP1), and p16(INK4a)), occur frequently in human oral cancers. Cellular responses to metabolic stress or genomic damage through p53 and related pathways that block cell cycle progression are also altered during oral carcinogenesis. In addition, new pathways and cell cycle regulatory proteins, such as p12(DOC-1), are being discovered. The multistep process of oral carcinogenesis likely involves functional alteration of cell cycle regulatory members combined with escape from cellular senescence and apoptotic signaling pathways. Detailing the molecular alterations and understanding the functional consequences of the dysregulation of the cell cycle apparatus in the malignant oral keratinocyte will uncover novel diagnostic and therapeutic approaches.
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Affiliation(s)
- R Todd
- Department of Oral & Maxillofacial Surgery, Massachusetts General Hospital/Harvard School of Dental Medicine, Boston, MA 02115, USA.
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Li YL, Wong DT, Wei W, Liu J. A novel acoustic window for trans-oesophageal echocardiography by using a saline-filled endotracheal balloon. Br J Anaesth 2006; 97:624-9. [PMID: 16973645 DOI: 10.1093/bja/ael244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 02/05/2023] Open
Abstract
BACKGROUND The main structures anterior to the trachea are frequently poorly visualized by trans-oesophageal echocardiography (TEE) because of the tracheal air column. We studied a new acoustic window for TEE imaging of large vessels anterior to the trachea by using a saline-filled endotracheal balloon. METHODS Cardiac surgery patients were studied. After ventilation was discontinued at the beginning of cardiopulmonary bypass, a saline-filled latex balloon was inserted into the trachea through the tracheal tube. The structures anterior to the trachea were imaged with and without the endotracheal balloon. TEE images of the proximal aortic arch and innominate artery were classified into three grades according to the quality of images: 1, vessel not visible; 2, part of vessel wall visible; 3, entire vessel wall visible. Grade 3 was categorized as good visualization while grades 1 and 2 were categorized as inadequate. TEE images with and without balloon were compared using the Mann-Whitney U-test and Chi-square analysis. P<0.05 was considered statistically significant. RESULTS In 20 patients, 84% had good visualization of proximal aortic arch with presence of endotracheal balloon compared with 11% without (P<0.001). A total of 94% had good visualization of the proximal innominate artery with presence of endotracheal balloon compared with 0% without (P<0.001). CONCLUSIONS A new 'TEE trans-tracheal acoustic window' was established by usage of a saline-filled endotracheal balloon. This window partially eliminates the TEE blind zone and provides improved visualization of the proximal aortic arch and innominate artery.
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Affiliation(s)
- Y-L Li
- Department of Anaesthesiology, West China Hospital Sichuan University, PR China
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Li Y, Denny P, Ho CM, Montemagno C, Shi W, Qi F, Wu B, Wolinsky L, Wong DT. The Oral Fluid MEMS/NEMS Chip (OFMNC): diagnostic and translational applications. Adv Dent Res 2005; 18:3-5. [PMID: 16000263 DOI: 10.1177/154407370501800102] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The ability to monitor health status, disease onset and progression, and treatment outcome through non-invasive means is a most desirable goal in health-care promotion and delivery. There are three prerequisites for this goal to be realized: specific biomarkers associated with a health or disease state, a non-invasive approach to detect and monitor the biomarkers, and the technologies to discriminate between and among the biomarkers. We present a roadmap to achieve these goals using oral fluids as the diagnostic medium to scrutinize the health and/or disease status of individuals. This is an ideal opportunity to bridge state-of-the-art micro-/nano-electromechanical system (MEMS/NEMS) sensors to oral fluid for diagnostic applications. As the "mirror of body", oral fluid is a perfect medium to be explored for health and disease surveillance. The translational applications and opportunities are enormous.
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Affiliation(s)
- Y Li
- University of California, Los Angeles, School of Dentistry and Dental Research Institute, 73-017 CHS, 10833 Le Conte Ave, Los Angeles, CA 90095, USA
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35
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Abstract
Duloxetine is a potent inhibitor of serotonin (5-hydroxytryptamine, 5-HT) and noradrenaline (NE) uptake in vitro and in vivo and is 3- to 5-times more effective at inhibiting 5-HT uptake. Duloxetine is a weak inhibitor of dopamine (DA) uptake and the binding of radioligands to neurotransmitter receptors. Upon administration of duloxetine in vivo, the inhibitory effects on uptake of 5-HT and NE persist for up to 8 h. Desmethylduloxetine, a potential metabolite, is also an inhibitor of 5-HT and NE uptake. Consistent with the ability to inhibit the uptake of 5-HT, duloxetine blocks p-chloroamphetamine induced depletion of mouse and rat brain 5-HT. Duloxetine also blocks the 6-hydroxydopamine induced depletion of mouse heart NE and 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) induced depletion of NE in frontal cortex but does not block the MPTP induced depletion of DA in rat striatum. Electrophysiological studies show that duloxetine decreases the activity of 5-HT neurones in dorsal raphe and at a 5-times higher dose also decreases the activity of NE neurones in the locus coeruleus. Microdialysis techniques have demonstrated that duloxetine effectively elevates extracellular 5-HT and NE levels in rat frontal cortex and hypothalamus. Antagonists at somatodendritic 5-HT(1A) autoreceptors or at presynaptic alpha(2)-adrenergic receptors could augment the duloxetine induced elevation of extracellular 5-HT, NE and DA levels. Duloxetine produces behavioural responses consistent with the enhancement of 5-HT and NE neurotransmission. Pharmacokinetic studies in healthy human volunteers show that duloxetine has a half-life of 10 - 15 h without the influence of food. In preliminary clinical trials, duloxetine has shown antidepressive effects in patients with major depression. Duloxetine offers an opportunity to utilise combined central 5-HT and NE neuronal pathways to improve the treatment of patients with major depression.
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Affiliation(s)
- D T Wong
- Lilly Neuroscience, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA
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Bymaster FP, Beedle EE, Findlay J, Gallagher PT, Krushinski JH, Mitchell S, Robertson DW, Thompson DC, Wallace L, Wong DT. Duloxetine (Cymbalta™), a dual inhibitor of serotonin and norepinephrine reuptake. Bioorg Med Chem Lett 2003; 13:4477-80. [PMID: 14643350 DOI: 10.1016/j.bmcl.2003.08.079] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A series of naphthalenyloxy-arylpropylamines have been prepared and are demonstrated to be inhibitors of both serotonin and norepinephrine reuptake. One member of this series, duloxetine (Cymbalta) has proven to be effective in clinical trials for the treatment of depression.
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Affiliation(s)
- F P Bymaster
- Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA
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Bymaster FP, Dreshfield-Ahmad LJ, Threlkeld PG, Shaw JL, Thompson L, Nelson DL, Hemrick-Luecke SK, Wong DT. Comparative affinity of duloxetine and venlafaxine for serotonin and norepinephrine transporters in vitro and in vivo, human serotonin receptor subtypes, and other neuronal receptors. Neuropsychopharmacology 2001; 25:871-80. [PMID: 11750180 DOI: 10.1016/s0893-133x(01)00298-6] [Citation(s) in RCA: 366] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The blockade of serotonin (5-HT) and norepinephrine (NE) transporters in vitro and in vivo by the dual 5-HT/NE reuptake inhibitors duloxetine and venlafaxine was compared. Duloxetine inhibited binding to the human NE and 5-HT transporters with K(i) values of 7.5 and 0.8 nM, respectively, and with a K(i) ratio of 9. Venlafaxine inhibited binding to the human NE and 5-HT transporters with K(i) values of 2480 and 82 nM, respectively, and with a K(i) ratio of 30. Duloxetine inhibited ex vivo binding to rat 5-HT transporters and NE transporters with ED(50) values of 0.03 and 0.7 mg/kg, respectively, whereas venlafaxine had ED(50) values of 2 and 54 mg/kg, respectively. The depletion of rat brain 5-HT by p-chloramphetamine and depletion of rat hypothalamic NE by 6-hydroxydopamine was blocked by duloxetine with ED(50) values of 2.3 and 12 mg/kg, respectively. Venlafaxine had ED(50) values of 5.9 and 94 mg/kg for blocking p-chloramphetamine- and 6-hydroxydopamine-induced monoamine depletion, respectively. Thus, duloxetine more potently blocks 5-HT and NE transporters in vitro and in vivo than venlafaxine.
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Affiliation(s)
- F P Bymaster
- Neuroscience Research Division, Lilly Research Laboratories, Lilly Corporate Center, Indianapolis, IN 46285-0510, USA.
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Alevizos I, Mahadevappa M, Zhang X, Ohyama H, Kohno Y, Posner M, Gallagher GT, Varvares M, Cohen D, Kim D, Kent R, Donoff RB, Todd R, Yung CM, Warrington JA, Wong DT. Oral cancer in vivo gene expression profiling assisted by laser capture microdissection and microarray analysis. Oncogene 2001; 20:6196-204. [PMID: 11593428 DOI: 10.1038/sj.onc.1204685] [Citation(s) in RCA: 174] [Impact Index Per Article: 7.6] [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: 02/28/2001] [Revised: 05/23/2001] [Accepted: 05/31/2001] [Indexed: 01/28/2023]
Abstract
Large scale gene expression profiling was carried out on laser capture microdissected (LCM) tumor and normal oral epithelial cells and analysed on high-density oligonucleotide microarrays. About 600 genes were found to be oral cancer associated. These oral cancer associated genes include oncogenes, tumor suppressors, transcription factors, xenobiotic enzymes, metastatic proteins, differentiation markers, and genes that have not been implicated in oral cancer. The database created provides a verifiable global profile of gene expression during oral carcinogenesis, revealing the potential role of known genes as well as genes that have not been previously implicated in oral cancer.
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Affiliation(s)
- I Alevizos
- Department of Oral Medicine and Diagnostic Sciences, Division of Oral Pathology, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
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Suliman Y, Opitz OG, Avadhani A, Burns TC, El-Deiry W, Wong DT, Rustgi AK. p63 expression is associated with p53 loss in oral-esophageal epithelia of p53-deficient mice. Cancer Res 2001; 61:6467-73. [PMID: 11522642] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The p53 gene family, comprising p53, p63, and p73, has overlapping and distinctive functional roles. These members share structural similarities allowing for dynamic interplay in the activation of genes that are important in development and key cellular functions, such as the induction of apoptosis. Whereas p53 is a classical tumor suppressor gene, p63 and p73 do not share this feature in cancer formation and progression. The compensation in the expression level of these members in a background that is deficient for one of them has not been examined previously. Given the importance of p63 in the development and differentiation of oral-esophageal stratified squamous epithelia and the absence of oral-esophageal tumors in p53-null mice, we postulated and describe herein that p63 expression is associated with the loss of p53 in a p53-deficient background. Both full-length and amino-truncated forms of p63 are expressed and increased in oral-esophageal epithelia of p53-null mice when compared with wild-type mice, and the induction of p21 may potentially be preserved through the increase of p63.
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Affiliation(s)
- Y Suliman
- Division of Gastroenterology, Abramson Family Cancer Research Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6144, USA
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Shintani S, Mihara M, Terakado N, Nakahara Y, Matsumura T, Kohno Y, Ohyama H, McBride J, Kent R, Todd R, Tsuji T, Wong DT. Reduction of p12DOC-1 expression is a negative prognostic indicator in patients with surgically resected oral squamous cell carcinoma. Clin Cancer Res 2001; 7:2776-82. [PMID: 11555592] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
PURPOSE p12DOC-1 is a growth suppressor that negatively regulates cyclin-dependent kinase 2 (CDK2) activities. Expression of p12DOC-1 is reduced and/or lost in tumor tissues. The purpose of this study is to correlate in vivo the expression of p12DOC-1 in oral cancer tissues by immunohistochemistry with clinical and pathological parameters. EXPERIMENTAL DESIGN Twenty-five cases of normal oral mucosa and 127 cases of oral squamous cell carcinomas were evaluated. Patients' charts were reviewed for clinical, pathological, and 10-year survival data. Because p12DOC-1 is a growth suppressor and associates with CDK2, parallel immunostaining was done for proliferating cell nuclear antigen and CDK2 to evaluate cell proliferation and potential correlation with CDK2. RESULTS Our results showed that strong p12DOC-1 staining was uniformly seen in normal oral mucosa. p12DOC-1 staining was reduced or absent in 81 cases (63.8%) of oral squamous cell carcinomas. Decreased p12DOC-1 staining (<25% of cells stained) correlated with tumor mode of invasion (P = 0.001) and higher proliferating cell nuclear antigen (P = 0.0028) and CDK2 (P = 0.0020) expression. Survival analysis showed significant correlation of low p12DOC-1 expression with the risk of cervical lymph node metastasis (P = 0.001) and patients' 10-year survival status (P = 0.0214). CONCLUSIONS These results allow us to conclude that reduction of p12DOC-1 protein expression is a frequent event in oral cancers. Intratumor immunohistochemical evaluation of p12DOC-1 expression can be an adjunctive prognostic indicator for patients with oral cancer.
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Affiliation(s)
- S Shintani
- Laboratory of Molecular Pathology, Division of Oral Pathology, Department of Oral Medicine and Diagnostic Sciences, Harvard School of Dental Medicine, Boston, MA 02115, USA
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Shintani S, Mihara M, Ueyama Y, Matsumura T, Wong DT. Cyclin D1 overexpression associates with radiosensitivity in oral squamous cell carcinoma. Int J Cancer 2001; 96:159-65. [PMID: 11410884 DOI: 10.1002/ijc.1014] [Citation(s) in RCA: 30] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Overexpression of cyclin D1, a G1 cell cycle regulator, is often found in many different tumor types, including oral squamous cell carcinomas (SCC). Recent laboratory experiments have demonstrated that cyclin D1 levels can influence radiosensitivity in various cell lines. This study evaluated the relationship between cyclin D1 expression levels and radiosensitivity in nine oral SCC cell lines (HSC2, HSC3, HSC4, SCC15, SCC25, SCC66, SCC111, Ca9-22, and NAN2) and 41 clinical patients with oral SCC who underwent preoperative radiation therapy. Radiosensitivity of the nine oral SCC cell lines differed greatly in their response to radiation, assessed by a standard colony formation assay. Likewise, the expression of cyclin D1 varied, and the magnitude of the cyclin D1 expression correlated with increased tumor radiosensitivity. The similar significant association between the response to preoperative radiation therapy and cyclin D1 overexpression was observed in the oral SCC patients who were treated with preoperative radiation therapy. These results suggest that cyclin D1 expression levels correlate to radiosensitivity and could be used to predict the effectiveness of radiation therapy on oral SCC.
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Affiliation(s)
- S Shintani
- Department of Oral and Maxillofacial Surgery II, Okayama University Dental School, Okayama, Japan.
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42
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Todd R, Donoff RB, Kim Y, Wong DT. From the chromosome to DNA: Restriction fragment length polymorphism analysis and its clinical application. J Oral Maxillofac Surg 2001; 59:660-7. [PMID: 11381391 DOI: 10.1053/joms.2001.22707] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Understanding how chromosomal alterations contribute to acquired and inherited human disease requires the ability to manage the enormous physical and informational complexity of the deoxyribonucleic acid (DNA) packaged within. Important concepts and techniques involved in the analysis of DNA include restriction enzymes, Southern blotting, and restriction fragment length polymorphism/linkage analysis. These techniques have been essential in the understanding and diagnosis of several syndromes associated with the head and neck. The purpose of this article is to introduce DNA structure, describe some techniques fundamental to DNA analysis, and provide a brief overview of the clinical applications of this technology with respect to dentinogenesis imperfecta and oral field cancerization.
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Affiliation(s)
- R Todd
- Department of Oral and Maxillofacial Surgery, Harvard School of Dental Medicine, Boston, MA, USA.
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Cheng DC, Newman MF, Duke P, Wong DT, Finegan B, Howie M, Fitch J, Bowdle TA, Hogue C, Hillel Z, Pierce E, Bukenya D. The efficacy and resource utilization of remifentanil and fentanyl in fast-track coronary artery bypass graft surgery: a prospective randomized, double-blinded controlled, multi-center trial. Anesth Analg 2001; 92:1094-102. [PMID: 11323328 DOI: 10.1097/00000539-200105000-00004] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
UNLABELLED We compared (a) the perioperative complications; (b) times to eligibility for, and actual time of the following: extubation, less intense monitoring, intensive care unit (ICU), and hospital discharge; and (c) resource utilization of nursing ratio for patients receiving either a typical fentanyl/isoflurane/propofol regimen or a remifentanil/isoflurane/propofol regimen for fast-track cardiac anesthesia in 304 adults by using a prospective randomized, double-blinded, double-dummy trial. There were no differences in demographic data, or perioperative mortality and morbidity between the two study groups. The mini-mental status examination at postoperative Days 1 to 3 were similar between the two groups. The eligible and actual times for extubation, less intense monitoring, ICU discharge, and hospital discharge were not significantly different. Further analyses revealed no differences in times for extubation and resource utilization after stratification by preoperative risk scores, age, and country. The nurse/patient ratio was similar between the remifentanil/isoflurane/propofol and fentanyl/isoflu-rane/propofol groups during the initial ICU phase and less intense monitoring phase. Increasing preoperative risk scores and older age (>70 yr) were associated with longer times until extubation (eligible), ICU discharge (eligible and actual), and hospital discharge (eligible and actual). Times until extubation (eligible and actual) and less intense monitoring (eligible) were significantly shorter in Canadian patients than United States' patients. However, there was no difference in hospital length of stay in Canadian and United States' patients. We conclude that both anesthesia techniques permit early and similar times until tracheal extubation, less intense monitoring, ICU and hospital discharge, and reduced resource utilization after coronary artery bypass graft surgery. IMPLICATIONS An ultra-short opioid technique was compared with a standard fast-track small-dose opioid technique in coronary artery bypass graft patients in a prospective randomized, double-blinded controlled study. The postoperative recovery and resource utilization, including stratification of preoperative risk score, age, and country, were analyzed.
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Affiliation(s)
- D C Cheng
- Division of Cardiac Anesthesia & Intensive Care, Toronto General Hospital, University of Toronto, Toronto, Ontario
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Abstract
Electric interference by cautery on demand pacemakers can cause inhibition and loss of pacing. We report a case in which electrocautery induced a pacemaker in ventricle-paced, ventricle-sensed, inhibited, rate-responsive (VVIR) mode to pace at a programmed maximum rate of 130 pulses/min.
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Affiliation(s)
- D T Wong
- Department of Anesthesiology, University of Toronto, Canada.
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Abstract
Cyclins and cyclin-dependent kinases (CDKs) play key roles in cell cycle regulation, a process of which dysregulation can lead to uncontrolled cell growth and hence to cancer. We have already reported the alteration of CDK4 and cyclin D1 expression in oral cancer. In this study, we examined by immunohistochemistry the expression of CDK2, and cyclins A and E in 20 normal oral mucosa, 42 dysplastic epithelia, and 103 oral squamous cell carcinomas (SCCs). The expressions of CDK2, and cyclins A and E were not detected in the normal epithelium and significantly altered from epithelial dysplasia to SCC. While there were no significant correlations between the expression of cyclins A, E and the patients' survival, CDK2 expression was significantly correlated with lymph node involvement (P = 0.025), tumor differentiation (P = 0.032), mode of tumor invasion (P = 0.017), and shorter survival period (P = 0.0173). These results suggest that the elevated expression of CDK2 is a critical factor in oral cancer progression and can be used as a negative predictive marker of the patients' prognosis.
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Affiliation(s)
- M Mihara
- Department of Oral and Maxillofacial Surgery II, Okayama University Dental School, Okayama 700-8525, Japan.
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Tsuji T, Usui S, Aida T, Tachikawa T, Hu GF, Sasaki A, Matsumura T, Todd R, Wong DT. Induction of epithelial differentiation and DNA demethylation in hamster malignant oral keratinocyte by ornithine decarboxylase antizyme. Oncogene 2001; 20:24-33. [PMID: 11244502 DOI: 10.1038/sj.onc.1204051] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2000] [Revised: 10/19/2000] [Accepted: 10/23/2000] [Indexed: 11/09/2022]
Abstract
The hamster ornithine decarboxylase antizyme (ODC-Az) cDNA was transfected into the hamster malignant oral keratinocyte cell line, HCPC-1. Ectopic expression of ODC-Az resulted in the reversion of malignant phenotypes and alteration of DNA methylation status of CCGG sites. The phenotypes examined include ODC enzymatic activity, doubling time, morphological change, anchorage dependent growth, tumorigenicity in nude mice, induction of epithelial differentiation marker protein (involucrin), and change of cell cycle position. Comparison of CCGG DNA methylation status of the ODC-Az and control vector transfectants revealed a significant increase in demethylation of 5-methyl cytosines (m5C) of CCGG sites in the ODC-Az transfectants. Ectopic expression of ODC-Az gene in hamster malignant oral keratinocytes led to reduce ODC activity and the subsequent demethylation of 5-methyl cytosines, presumably via the ODC/ polyamines/ decarboxylated S-adenosylmethionine (dc-AdoMet) pathways. Our data suggest that ODC-Az shared the same pathway of polyamines/ dc-AdoMet/DNA methyltransferase (DNA MTase). We propose that ODC-Az mediates a novel mechanism in tumor suppression by DNA demethylation and presumably re-activation of key cellular genes silenced by DNA hypermethylation during cancer development. Oncogene (2001) 20, 24 - 33.
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Affiliation(s)
- T Tsuji
- Department of Oral Medicine and Diagnostic Sciences, Division of Oral Pathology, Harvard School of Dental Medicine, Boston, Massachusetts, MA 02115, USA
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Kiyota A, Shintani S, Mihara M, Nakahara Y, Ueyama Y, Matsumura T, Todd R, Wong DT. Expression of a truncated epidermal growth factor receptor in oral squamous cell carcinomas. Cancer Lett 2000; 161:9-15. [PMID: 11078908 DOI: 10.1016/s0304-3835(00)00573-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Epidermal growth factor receptor (EGFR) frequently overexpresses in cancers, including oral squamous cell carcinomas (OSCC). We previously identified a truncated EGFR (tEGFR) in human oral keratinocytes. In this study, we evaluated the prognostic value of tEGFR in 45 cases of OSCC. tEGFR expression inversely correlated with EGFR expression (r=-0.83, P<0.01), decreased with T-stage progression and lymph-node metastasis (P<0.05). The EGFR/tEGFR ratio correlated with the lymph-node metastasis (P<0.05) and survival outcome (hazard ratio =3.601; P<0.05). These results suggest that tEGFR may play an important roles in oral carcinogenesis and that the EGFR/tEGFR ratio may be a prognostic factor for OSCC.
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Affiliation(s)
- A Kiyota
- Department of Oral and Maxillofacial Surgery II, Okayama University Dental School, Okayama, Japan
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Shintani S, Ohyama H, Zhang X, McBride J, Matsuo K, Tsuji T, Hu MG, Hu G, Kohno Y, Lerman M, Todd R, Wong DT. p12(DOC-1) is a novel cyclin-dependent kinase 2-associated protein. Mol Cell Biol 2000; 20:6300-7. [PMID: 10938106 PMCID: PMC86104 DOI: 10.1128/mcb.20.17.6300-6307.2000] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Regulated cyclin-dependent kinase (CDK) levels and activities are critical for the proper progression of the cell division cycle. p12(DOC-1) is a growth suppressor isolated from normal keratinocytes. We report that p12(DOC-1) associates with CDK2. More specifically, p12(DOC-1) associates with the monomeric nonphosphorylated form of CDK2 (p33CDK2). Ectopic expression of p12(DOC-1) resulted in decreased cellular CDK2 and reduced CDK2-associated kinase activities and was accompanied by a shift in the cell cycle positions of p12(DOC-1) transfectants ( upward arrow G(1) and downward arrow S). The p12(DOC-1)-mediated decrease of CDK2 was prevented if the p12(DOC-1) transfectants were grown in the presence of the proteosome inhibitor clasto-lactacystin beta-lactone, suggesting that p12(DOC-1) may target CDK2 for proteolysis. A CDK2 binding mutant was created and was found to revert p12(DOC-1)-mediated, CDK2-associated cell cycle phenotypes. These data support p12(DOC-1) as a specific CDK2-associated protein that negatively regulates CDK2 activities by sequestering the monomeric pool of CDK2 and/or targets CDK2 for proteolysis, reducing the active pool of CDK2.
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Affiliation(s)
- S Shintani
- Laboratory of Molecular Pathology, Medical School, Harvard University, Boston, Massachusetts 02115, USA
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Zhang W, Perry KW, Wong DT, Potts BD, Bao J, Tollefson GD, Bymaster FP. Synergistic effects of olanzapine and other antipsychotic agents in combination with fluoxetine on norepinephrine and dopamine release in rat prefrontal cortex. Neuropsychopharmacology 2000; 23:250-62. [PMID: 10942849 DOI: 10.1016/s0893-133x(00)00119-6] [Citation(s) in RCA: 147] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To understand the mechanism of the clinical efficacy of olanzapine and fluoxetine combination therapy for treatment-resistant depression (TRD), we studied the effects of olanzapine and other antipsychotics in combination with the selective serotonin uptake inhibitors fluoxetine or sertraline on neurotransmitter release in rat prefrontal cortex (PFC) using microdialysis. The combination of olanzapine and fluoxetine produced robust, sustained increases of extracellular levels of dopamine ([DA](ex)) and norepinephrine ([NE](ex)) up to 361 +/- 28% and 272 +/- 16% of the baseline, respectively, which were significantly greater than either drug alone. This combination produced a slightly smaller increase of serotonin ([5-HT](ex)) than fluoxetine alone. The combination of clozapine or risperidone with fluoxetine produced less robust and persistent increases of [DA](ex) and [NE](ex). The combination of haloperidol or MDL 100907 with fluoxetine did not increase the monoamines more than fluoxetine alone. Olanzapine plus sertraline combination increased only [DA](ex). Therefore, the large, sustained increase of [DA](ex), [NE](ex), and [5-HT](ex) in PFC after olanzapine-fluoxetine treatment was unique and may contribute to the profound antidepressive effect of the olanzapine and fluoxetine therapy in TRD.
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Affiliation(s)
- W Zhang
- Neuroscience Research Division, Lilly Research Laboratories, Lilly Corporate Center, Indianapolis, IN 46285-0510, USA
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