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Bui HH, Nguyen STB, Phan ST, Nguyen KM, Nguyen CD. Evaluating M2BPGi as a Marker for Liver Fibrosis in Patients with Chronic Hepatitis B. Dig Dis Sci 2023; 68:4407-4417. [PMID: 37861877 PMCID: PMC10635958 DOI: 10.1007/s10620-023-08143-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 10/02/2023] [Indexed: 10/21/2023]
Abstract
BACKGROUND The accurate evaluation of liver fibrosis is crucial for the treatment and follow up of chronic hepatitis B (CHB) patients. AIM We examined the efficiency of serum Mac-2 Binding Protein Glycosylation isomer (M2BPGi) in diagnosing liver fibrosis stages in CHB patients. METHODS A cross-sectional study was conducted on 177 adult CHB patients visiting the University Medical Center Ho Chi Minh City, Vietnam between October 2019 and December 2021. M2BPGi, ARFI, APRI, and FIB-4 were tested against FibroScan® for sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). The optimal M2BPGi cut-off values were identified based on the area under the receiver operating characteristic (AUROC) curve. RESULTS There was a strong agreement between M2BPGi and FibroScan® (r = 0.77, P < 0.001). The optimal M2BPGi cut-off index (C.O.I) for detecting significant fibrosis (F ≥ 2) was 0.79 with an AUROC of 0.77, 67.3% sensitivity, 70% specificity, 60.6% NPV, and 75.3% PPV. Compared with APRI (61%) and FIB-4 (47%), M2BPGi had the greatest sensitivity for diagnosing F ≥ 2. M2BPGi combined with APRI yielded highest diagnosis performance for F ≥ 2 with an AUROC of 0.87. The optimal cut-off index of M2BPGi for diagnosing cirrhosis (F4) was 1.3 with an AUROC of 0.91, 88% sensitivity, 87.4% specificity, 97% NPV, and 61% PPV. The AUROC of M2BPGi for diagnosing F4 was comparable to that of ARFI (0.93). CONCLUSIONS With cut-off values of 0.79 C.O.I and 1.3 C.O.I, M2BPGi could be an effective method for diagnosing significant fibrosis and cirrhosis in CHB patients, respectively.
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Affiliation(s)
- Hoang Huu Bui
- Department of Gastroenterology, University Medical Center Ho Chi Minh City, 215 Hong Bang Street, Ward 11, District 5, Ho Chi Minh City, 70000, Vietnam
- Department of Internal Medicine, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | - Suong Thi-Bang Nguyen
- Department of Clinical Laboratory, University Medical Center Ho Chi Minh City, 215 Hong Bang Street, Ward 11, District 5, Ho Chi Minh City, 70000, Vietnam
- Department of Biochemistry, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | - Sang The Phan
- Department of Gastroenterology, University Medical Center Ho Chi Minh City, 215 Hong Bang Street, Ward 11, District 5, Ho Chi Minh City, 70000, Vietnam
| | - Khue Minh Nguyen
- Vietnam National University, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, 700000, Vietnam
| | - Chuong Dinh Nguyen
- Department of Gastroenterology, University Medical Center Ho Chi Minh City, 215 Hong Bang Street, Ward 11, District 5, Ho Chi Minh City, 70000, Vietnam.
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2
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Cao NH, Ho PT, Bui HH, Vo TD. Non-Invasive Methods for the Prediction of Spontaneous Bacterial Peritonitis in Patients with Cirrhosis. Gastroenterology Insights 2023. [DOI: 10.3390/gastroent14020013] [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: 04/07/2023] Open
Abstract
Spontaneous bacterial peritonitis (SBP) is a potentially fatal complication in patients with liver cirrhosis. Early diagnosis and prompt treatment of SBP are vital to shorten hospital stays and reduce mortality. According to society guidelines, patients with cirrhosis and ascites who are admitted to the hospital should have diagnostic paracentesis. However, for various reasons, paracentesis may be delayed or not performed. Therefore, recent research has focused on identifying non-invasive parameters useful in SBP prediction which require urgent antibiotic therapy if rapid and secure paracentesis is not possible or there is insufficient experience with this method. In this review, we discuss the non-invasive methods available to predict SBP.
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Affiliation(s)
- Ngoc Huynh Cao
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City 72714, Vietnam
| | - Phat Tan Ho
- Department of Gastroenterology, Cho Ray Hospital, Ho Chi Minh City 72713, Vietnam
| | - Hoang Huu Bui
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City 72714, Vietnam
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City 72714, Vietnam
| | - Thong Duy Vo
- Department of Internal Medicine, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City 72714, Vietnam
- Department of Gastroenterology, Cho Ray Hospital, Ho Chi Minh City 72713, Vietnam
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3
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Bui HH, Dang LM, Thi-Ngoc Vo D, Nguyen CD. Colonic Dilatation Complicating Acute Severe Ulcerative Colitis Managed Successfully with Accelerated Infliximab Dosing. Case Rep Gastroenterol 2023; 17:82-88. [PMID: 36760465 PMCID: PMC9906040 DOI: 10.1159/000529152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 01/09/2023] [Indexed: 02/10/2023] Open
Abstract
Lately, emerging data suggest an association between the development of inflammatory bowel disease and anti-interleukin-17 therapy. Megacolon is a life-threatening complication of acute severe ulcerative colitis (ASUC), but its treatment has not yet been established in current practice guidelines. We report a rare case of known psoriasis treated by secukinumab in a patient who presented with ASUC and colonic dilatation. Neither steroids nor standard infliximab regimen was effective. Finally, rescue therapy with accelerated infliximab strategy resulted in excellent recovery. In certain cases of steroid-refractory ASUC complicated by megacolon, accelerated infliximab regimen can be an alternative to surgery.
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Affiliation(s)
- Hoang Huu Bui
- Department of Gastroenterology, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam,Department of Internal Medicine, University Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Luan Minh Dang
- Department of Gastroenterology, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam,Department of Internal Medicine, University Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Diem Thi-Ngoc Vo
- Department of Pathology, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam,Department of Pathology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Chuong Dinh Nguyen
- Department of Gastroenterology, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
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4
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Quach DT, Mai BH, Tran MK, Dao LV, Tran HV, Vu KT, Vu KV, Pham HTT, Bui HH, Ho DDQ, Trinh DT, Nguyen VT, Duong TH, Tran TTK, Nguyen HTV, Nguyen TT, Nguyen TD, Nguyen LC, Dao HV, Thai KD, Phan NT, Le LT, Vo CHM, Ho PT, Nguyen TL, Le QD, Le NV, Phan HQ, Nguyen BC, Tran TT, Tran TV, Ta L. Vietnam Association of Gastroenterology (VNAGE) consensus on the management of Helicobacter pylori infection. Front Med (Lausanne) 2023; 9:1065045. [PMID: 36714104 PMCID: PMC9878302 DOI: 10.3389/fmed.2022.1065045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 12/21/2022] [Indexed: 01/15/2023] Open
Abstract
Helicobacter pylori (H. pylori) infection is prevalent and has a rapidly increasing antibiotic resistance rate in Vietnam. Reinfection is quite common, and gastric carcinoma remains one of the most common malignancies, which is not uncommon to develop after successful eradication. The purpose of this consensus is to provide updated recommendations on the management of H. pylori infection in the country. The consensus panel consisted of 32 experts from 14 major universities and institutions in Vietnam who were invited to review the evidence and develop the statements using the Delphi method. The process followed the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system. The consensus level was defined as ≥80% for agreement on the proposed statements. Due to the limited availability of high-quality local evidence, this consensus was also based on high-quality evidence from international studies, especially those conducted in other populations in the Asia-Pacific region. The panel finally reached a consensus on 27 statements after two voting rounds, which consisted of four sections (1) indications for testing and selection of diagnostic tests (2), treatment regimens, (3) post-treatment confirmation of H. pylori status, and (4) reinfection prevention methods and follow-up after eradication. Important issues that require further evidence include studies on third-line regimens, strategies to prevent H. pylori reinfection, and post-eradication follow-up for precancerous gastric lesions. We hope this consensus will help guide the current clinical practice in Vietnam and promote multicenter studies in the country and international collaborations.
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Affiliation(s)
- Duc Trong Quach
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam,Nhan Dan Gia Dinh Hospital, Ho Chi Minh City, Vietnam,*Correspondence: Duc Trong Quach, ; orcid.org/0000-0003-0141-921X
| | - Bang Hong Mai
- 108 Military Central Hospital, Hanoi, Vietnam,Bang Hong Mai,
| | - Mien Kieu Tran
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Long Van Dao
- Internal Medicine Faculty, Hanoi Medical University, Hanoi, Vietnam
| | - Huy Van Tran
- Hue University of Medicine and Pharmacy, Hue, Vietnam
| | | | | | - Ho Thi-Thu Pham
- Internal Medicine Faculty, Hanoi Medical University, Hanoi, Vietnam
| | - Hoang Huu Bui
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | | | | | - Vinh Thuy Nguyen
- Department of Internal Medicine, Hanoi National University, Hanoi, Vietnam
| | - Thai Hong Duong
- Department of Internal Medicine, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen, Vietnam
| | - Tuong Thi-Khanh Tran
- Department of Internal Medicine, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
| | | | | | | | | | - Hang Viet Dao
- Internal Medicine Faculty, Hanoi Medical University, Hanoi, Vietnam
| | | | | | | | | | | | | | - Quang Dinh Le
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Nho Viet Le
- Department of Internal Medicine, Da Nang University of Medical Technology and Pharmacy, Da Nang, Vietnam
| | | | | | - Trung Thien Tran
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | | | - Long Ta
- 108 Military Central Hospital, Hanoi, Vietnam
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5
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Bui HH, Vo VH, Nguyen CD, Phan ST, Quach PT, Nguyen DB. Diagnostic Performance of Acoustic Radiation Force Impulse Imaging in Evaluating Liver Fibrosis in Patients with Chronic Hepatitis B Infection: A Cross-Sectional Study. Indian J Radiol Imaging 2022; 32:287-293. [PMID: 36177272 PMCID: PMC9514909 DOI: 10.1055/s-0042-1755251] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background
Acoustic radiation force impulse point shear wave elastography (ARFI-pSWE), measuring shear-wave velocity (SWV), has been utilized to examine the liver stiffness caused by different etiologies. However, information on its reliability in staging liver fibrosis in chronic hepatitis B (CHB) patients is scarce.
Purpose
The aim of the study is to examine the diagnostic performance of ARFI-pSWE and determine the optimal SWV cut-off values to predict significant fibrosis (
F
≥2) and cirrhosis (F4) in CHB patients.
Material and Methods
All 114 adult CHB patients visiting the University Medical Center, Ho Chi Minh City, Vietnam between February 2019 and March 2021 underwent liver stiffness measurement using ARFI-pSWE and FibroScan. SWV results were tested against FibroScan for sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). The area under the receiver operating characteristic (AUROC) curve was used to identify the optimal SWV cut-off values.
Results
There was a strong agreement between ARFI-pSWE and FibroScan (
r
= 0.92,
p
<0.001). The optimal SWV cut-off value for detecting significant fibrosis was 1.37 m/s with an AUROC of 0.975, sensitivity of 83.3%, specificity of 100%, PPV of 100%, and NPV of 81%. The optimal cut-off value for predicting cirrhosis was 1.70 m/s with an AUROC of 0.986, sensitivity of 97%, specificity of 93%, PPV of 95%, and NPV of 96%.
Conclusion
ARFI-pSWE could be an effective technique for evaluating liver fibrosis in CHB patients. SWV cut-off values of 1.37 and 1.70 m/s could be used to diagnose significant fibrosis and cirrhosis, respectively.
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Affiliation(s)
- Hoang Huu Bui
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
- Department of Internal Medicine, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | - Van Huy Vo
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
| | - Chuong Dinh Nguyen
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
| | - Sang The Phan
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
| | - Phong Tien Quach
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
| | - Dung Bich Nguyen
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
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6
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Thi Cam Huong N, Trung NQ, Luong BA, Tram DB, Vu HA, Bui HH, Pham Thi Le H. Mutations in the HBV PreS/S gene related to hepatocellular carcinoma in Vietnamese chronic HBV-infected patients. PLoS One 2022; 17:e0266134. [PMID: 35390033 PMCID: PMC8989215 DOI: 10.1371/journal.pone.0266134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Accepted: 03/15/2022] [Indexed: 12/23/2022] Open
Abstract
Background Chronic hepatitis B virus (CHB) infection is a major health problem and leading cause of hepatocellular carcinoma (HCC) worldwide. Several point and deletion mutations on the PreS/S gene have been intensively considered associated with HCC. This study aimed to describe the characteristics of HBV PreS/S mutations in Vietnamese CHB-infected patients and their association with HCC. Methods This cross-sectional study was conducted from 02/2020 to 03/2021, recruited Vietnamese CHB-infected patients with HBV-DNA >3 log10-copies/mL and successful PreS/S gene sequencing. Mutations were detected by direct Sanger sequencing. Results 247 CHB-infected patients were recruited, characterized by 68.8% males, 54.7% HBV genotype B, 57.5% HBeAg positive, 23.1% fibrosis score ≥F3 and 19.8% HCC. 61.8% amino acid replacements were detected throughout the PreS1/PreS2/S genes. The most common point-mutations included N/H51Y/T/S/Q/P (30.4%), V68T/S/I (44.9%), T/N87S/T/P (46.2%) on PreS1 gene; T125S/N/P (30.8%), I150T (42.5%) on PreS2 gene; S53L (37.7%), A184V/G (39.3%), S210K/N/R/S (39.3%) on S gene. The rates of case(s) with any point-mutation on the Major Hydrophylic Region (MHR) and the "a" determinant region were 63.6% and 39.7%, respectively. Most of S point-mutations were presented with low rates such as T47A/E/V/K (9.3%), P120S/T (8.5%), G145R (2%). On multivariable analysis, males (OR = 4.51, 95%CI 1.78–11.4, p = 0.001), age≥40 (OR = 5.5, 95%CI 2.06–14.68, p = 0.001), W4P/R/Y on PreS1 (OR = 11.56, 95%CI 1.99–67.05, p = 0.006) and 4 S point-mutations as: T47A/E/V/K (OR = 3.67, 95%CI 1.19–11.29, p = 0.023), P120S/T (OR = 3.38, 95%CI 1.09–10.49, p = 0.035), S174N (OR = 29.73, 95%CI 2.12–417.07, p = 0.012), P203R (OR = 8.45, 95%CI 1.43–50.06, p = 0.019) were associated with HCC. Conclusions We detected 61% amino acid changes on PreS/S regions in Vietnamese CHB patients. One point-mutation at amino acid 4 on PreS1 gene and 4 point-mutations at amino acids 47, 120, 174, and 203 on S gene were associated with HCC. Further investigations are recommended to further clarify the relationship and interaction between mutations in HBV genome and HCC progression.
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Affiliation(s)
- Nguyen Thi Cam Huong
- Department of Infectious Diseases, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
- * E-mail:
| | - Nguyen Quang Trung
- Department of Infectious Diseases, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
| | - Bac An Luong
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Duong Bich Tram
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoang Anh Vu
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoang Huu Bui
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
| | - Hoa Pham Thi Le
- Department of Infectious Diseases, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Department of Gastroenterology, University Medical Center, Ho Chi Minh City, Vietnam
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7
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de Carvalho Ferreira HC, Pauszek SJ, Ludi A, Huston CL, Pacheco JM, Le VT, Nguyen PT, Bui HH, Nguyen TD, Nguyen T, Nguyen TT, Ngo LT, Do DH, Rodriguez L, Arzt J. An Integrative Analysis of Foot-and-Mouth Disease Virus Carriers in Vietnam Achieved Through Targeted Surveillance and Molecular Epidemiology. Transbound Emerg Dis 2015; 64:547-563. [PMID: 26301461 DOI: 10.1111/tbed.12403] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Indexed: 11/28/2022]
Abstract
Foot-and-mouth disease (FMD) is a major constraint to transboundary trade in animal products, yet much of its natural ecology and epidemiology in endemic regions is still poorly understood. To address this gap, a multidisciplinary, molecular and conventional epidemiological approach was applied to an investigation of endemic FMD in Vietnam. Within the study space, it was found that 22.3% of sampled ruminants had previously been infected with FMD virus (FMDV), of which 10.8% were persistent, asymptomatic carriers (2.4% of the total population). Descriptive data collected from targeted surveillance and a farm questionnaire showed a significantly lower prevalence of FMDV infection for dairy farms. In contrast, farms of intermediate size and/or history of infection in 2010 were at increased risk of FMD exposure. At the individual animal level, buffalo had the highest exposure risk (over cattle), and there was spatial heterogeneity in exposure risk at the commune level. Conversely, carrier prevalence was higher for beef cattle, suggesting lower susceptibility of buffalo to persistent FMDV infection. To characterize virus strains currently circulating in Vietnam, partial FMDV genomic (VP1) sequences from carrier animals collected between 2012 and 2013 (N = 27) and from FMDV outbreaks between 2009 and 2013 (N = 79) were compared by phylogenetic analysis. Sequence analysis suggested that within the study period, there were two apparent novel introductions of serotype A viruses and that the dominant lineage of serotype O in Vietnam shifted from SEA/Mya-98 to ME-SA/PanAsia. FMDV strains shared close ancestors with FMDV from other South-East Asian countries indicating substantial transboundary movement of the predominant circulating strains. Close genetic relationships were observed between carrier and outbreak viruses, which may suggest that asymptomatic carriers of FMDV contribute to regional disease persistence. Multiple viral sequences obtained from carrier cattle over a 1-year period had considerable within-animal genetic variation, indicating within-host virus evolution.
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Affiliation(s)
- H C de Carvalho Ferreira
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Greenport, NY, USA.,Oak Ridge Institute for Science and Education, PIADC Research Participation Program, Oak Ridge, TN, USA
| | - S J Pauszek
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Greenport, NY, USA
| | - A Ludi
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Greenport, NY, USA.,Oak Ridge Institute for Science and Education, PIADC Research Participation Program, Oak Ridge, TN, USA
| | - C L Huston
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, USA
| | - J M Pacheco
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Greenport, NY, USA
| | - V T Le
- Regional Animal Health Office No. 6, Department of Animal Health, Ministry of Agriculture and Rural Development, Ho Chi Minh City, Vietnam
| | - P T Nguyen
- Regional Animal Health Office No. 6, Department of Animal Health, Ministry of Agriculture and Rural Development, Ho Chi Minh City, Vietnam
| | - H H Bui
- Regional Animal Health Office No. 6, Department of Animal Health, Ministry of Agriculture and Rural Development, Ho Chi Minh City, Vietnam
| | - T D Nguyen
- National Centre for Veterinary Diagnostics, Hanoi, Vietnam
| | - T Nguyen
- National Centre for Veterinary Diagnostics, Hanoi, Vietnam
| | - T T Nguyen
- Department of Animal Health, Ministry of Agriculture and Rural Development, Hanoi, Vietnam
| | - L T Ngo
- Regional Animal Health Office No. 6, Department of Animal Health, Ministry of Agriculture and Rural Development, Ho Chi Minh City, Vietnam
| | - D H Do
- Department of Animal Health, Ministry of Agriculture and Rural Development, Hanoi, Vietnam
| | - L Rodriguez
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Greenport, NY, USA
| | - J Arzt
- Foreign Animal Disease Research Unit, Plum Island Animal Disease Center, Agricultural Research Service, United States Department of Agriculture, Greenport, NY, USA
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8
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Affiliation(s)
- T Gurlo
- University of Southern California, School of Pharmacy, Department of Pharmaceutical Sciences, Los Angeles 90033, USA
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9
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Abstract
In this report, the quantitative structure-activity relationship (QSAR) analyses of substituted phenols, vitamin E derivatives and flavonoids are presented. Two models have been derived using calculated parameters such as the heat of formation (Hf), the energy of the lowest unoccupied molecular orbital of radicals (E(lumo-r)) the energy of the highest occupied molecular orbital of the parent compounds (E(homo)) and the number of hydroxyl groups (OH). These models can be used to estimate the redox potentials or antioxidant activities of new substituted phenolic compounds or vitamin E derivatives. The Trolox equivalent antioxidant capacities (TEACs) of 42 different flavonoids are found to be mainly governed by the number and location of hydroxyl groups on the flavonoid ring system.
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Affiliation(s)
- E J Lien
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles 90033, USA
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