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Nguyen UD, Le Do Q, Vu QAN, Trieu NT, Dao TT, Van Le N, Nguyen ST, Hoang TT, Nguyen CT, Nguyen TH, Van Nguyen D, Ho TH. Selective detection of HBV pre-genomic RNA in chronic hepatitis B patients using a novel RT-PCR assay. Clin Exp Med 2023; 23:5281-5289. [PMID: 37572154 DOI: 10.1007/s10238-023-01162-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 07/31/2023] [Indexed: 08/14/2023]
Abstract
In chronic hepatitis B (CHB) patients, quantification of HBV pgRNA in plasma has the potential to provide information on disease prognosis and liver injury or histopathology. However, current methods for detecting HBV pgRNA present technical difficulties due to the co-existence of HBV DNA in plasma samples. We have successfully established a novel one-step RT-PCR assay that allows selective quantification of HBV pgRNA. Two cohorts of participants were recruited for assay validation, including treatment-naïve patients with CHB and HBeAg-positive CHB patients who were treated with Tenofovir and monitored for 6 months to assess the predictive value of baseline HBV RNA for HBeAg seroclearance. Statistical analysis was performed using MedCalc version 20.019 software. The novel selective one-step RT-PCR assay for detecting HBV pgRNA was validated with a limit of detection of 100 copies/mL. The assay was able to selectively measure HBV pgRNA even in the presence of excess HBV rcDNA. In treatment-naïve CHB patients, HBV pgRNA levels were significantly lower than HBV DNA concentration. Serum HBV DNA levels and HBeAg status were positively associated with HBV pgRNA. Baseline serum HBV pgRNA levels were found to be strong predictors of HBeAg seroclearance after 6 months of Tenofovir treatment. The study presents a novel RT-PCR assay that allows accurate measurement of plasma HBV pgRNA in chronic hepatitis B patients, even in the presence of excess HBV DNA. The assay is highly selective and represents a significant advancement with potential for further breakthroughs in understanding the clinical significance of HBV pgRNA.
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Affiliation(s)
- Ung Dinh Nguyen
- Department of Genomics and Cytogenetics, Institute of Biomedicine and Pharmacy (IBP), Vietnam Military Medical University, Hanoi, Vietnam
| | - Quyen Le Do
- Department of Infectious Disease, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Quynh Anh Nguyen Vu
- Department of Genomics and Cytogenetics, Institute of Biomedicine and Pharmacy (IBP), Vietnam Military Medical University, Hanoi, Vietnam
| | - Nguyet Thi Trieu
- Department of Genomics and Cytogenetics, Institute of Biomedicine and Pharmacy (IBP), Vietnam Military Medical University, Hanoi, Vietnam
| | - Trang Thuy Dao
- Department of Genomics and Cytogenetics, Institute of Biomedicine and Pharmacy (IBP), Vietnam Military Medical University, Hanoi, Vietnam
| | - Nam Van Le
- Department of Infectious Disease, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Son Thai Nguyen
- Department of Microbiology, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
- Medical Testing Center, Medlatec Group, Hanoi, Vietnam
| | - Tuyen Tien Hoang
- Department of Infectious Disease, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Chinh Trong Nguyen
- Department of Infectious Disease, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Thang Hong Nguyen
- Outpatient Department, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Dien Van Nguyen
- Department of Infectious Disease, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
- Systems Immunity Research Institute, School of Medicine, Cardiff University, Cardiff, UK
| | - Tho Huu Ho
- Department of Genomics and Cytogenetics, Institute of Biomedicine and Pharmacy (IBP), Vietnam Military Medical University, Hanoi, Vietnam.
- Department of Microbiology, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam.
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Bonilla ED, Hayashi M, Pameijer CH, Le NV, Morrow BR, Garcia-Godoy F. The effect of two composite placement techniques on fracture resistance of MOD restorations with various resin composites. J Dent 2020; 101:103348. [PMID: 32417397 DOI: 10.1016/j.jdent.2020.103348] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 04/13/2020] [Accepted: 04/15/2020] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVE The aim of this in vitro study was to compare the effect of two restorative placement techniques, centripetal incremental technique (CIT) and bulk-fill technique (BT) on the fracture resistance of Class II MOD restorations with various resin composites in molar teeth. MATERIALS AND METHODS Fifty-six extracted, caries free third molars were prepared with MOD preparations and restored with resin composites. The specimens were divided into two groups by placement technique, centripetal incremental technique (CIT) and bulk-fill technique (BT). Each group was subdivided into four groups according to resin composite: hybrid (Aelite LS), nano-hybrid (Virtuoso Universal), bulk fill (Filtek One Bulk Fill) and the micro-hybrid (Herculite XRV) as the control. RESULTS Two-way analysis of variance test (ANOVA) followed by the multiple comparison procedure, Student-Newman-Keuls Method showed no a statistically significant difference between placement techniques and fracture resistance of Class II resin composite restorations (P > 0.05). Herculite XRV resisted a significantly higher load before fracture than the other three materials at a 0.05 level of significance, while Virtuoso Universal scored the lowest load. CONCLUSIONS There was no significant effect of the two placement techniques on the fracture resistance of Class II resin composite restorations CLINICAL SIGNIFICANCE: Resin composite restorations in Class II MODs using a simplified bulk fill placement technique showed no significant difference in fracture resistance with the centripetal technique in molar teeth.
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Affiliation(s)
- E D Bonilla
- University of California, Los Angeles, School of Dentistry, Los Angeles, CA, USA
| | - M Hayashi
- Researcher and Vice Chair of the Section of Restorative, Dentistry, University of California, Los Angeles, CA, USA.
| | - C H Pameijer
- Department of Reconstructive Sciences, University of Connecticut School of Dental Medicine, CT, USA
| | - N V Le
- University of California, Los Angeles, School of Dentistry, Los Angeles, CA, USA
| | - B R Morrow
- Department of Bioscience Research, University of Tennessee Health, Science Center, Memphis, TN, USA
| | - F Garcia-Godoy
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, TN, USA; The Forsyth Center, Cambridge, MA, USA
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Le TK, Bach KH, Ho ML, Le NV, Nguyen TN, Chevrier D, Guesdon JL. Molecular fingerprinting of Mycobacterium tuberculosis strains isolated in Vietnam using IS6110 as probe. Tuber Lung Dis 2000; 80:75-83. [PMID: 10912282 DOI: 10.1054/tuld.2000.0234] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
SETTING Northern and Southern areas of Vietnam. OBJECTIVE To study the correlation between DNA fingerprinting of 168 Mycobacterium tuberculosis strains isolated from patients with a particular historical past (political separation of Vietnam for 20 years) and data about geographical origin, drug susceptibility, HIV infection and BCG vaccination status. METHODS Comparison of restriction fragment length polymorphism (RFLP) patterns produced by Southern hybridization of Pvull-digested chromosomal DNA. RESULTS The number of IS6110 copies for the 168 strains ranges from 0 to 23. Strains originating from the North or the South differ strongly with respect to the number of copies of IS6110. Indeed, the strains originating from the north have predominantly from 3 to 14 IS6110 copies while the southern strains have predominantly from 15 to 23 IS6110 copies. Furthermore, strains isolated in the North are dispersed into 6 groups whereas 80% of the strains isolated in the South form a single group. Moreover, the prevalence of drug resistance is higher in strains isolated in the South than in the North. No noticeable correlation is observed between RFLP patterns, drug susceptibility, or HIV infection. CONCLUSION The IS6110 fingerprints of 168 M. tuberculosis strains isolated in Vietnam showed a high range of polymorphism. Only a few strains have been found with no IS6110 (1.8%). The differences between the strains from the North and South, having more than six IS6110, suggests that they derived from ancestral strains that would be distinguishable by the number of IS6110 and their transposition sites throughout the genome. The genomic structure of the population of strains from South Vietnam resembles that of the Beijing strain population. This could account for a similar evolution of M. tuberculosis due to a selection by BCG-induced immunity in the two populations.
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Affiliation(s)
- T K Le
- National Institute of Hygiene and Epidemiology, Hanoi
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Thierry D, Chavarot P, Marchal G, Le Thi KT, Ho ML, Nguyen NL, Le NV, Ledru S, Fumoux F, Guesdon JL. Mycobacterium tuberculosis strains unidentified using the IS6110 probe can be detected by oligonucleotides derived from the Mt308 sequence. Res Microbiol 1995; 146:325-8. [PMID: 7569326 DOI: 10.1016/0923-2508(96)81055-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- D Thierry
- Laboratoire de Prédéveloppement des Sondes, Institut Pasteur, Paris
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