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Wang Y, Li T, Yang C, Wu Y, Liu Y, Yang X. Eurotium cristatum from Fu Brick Tea Promotes Adipose Thermogenesis by Boosting Colonic Akkermansia muciniphila in High-Fat-Fed Obese Mice. Foods 2023; 12:3716. [PMID: 37893609 PMCID: PMC10606327 DOI: 10.3390/foods12203716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/23/2023] [Accepted: 10/07/2023] [Indexed: 10/29/2023] Open
Abstract
This study investigated the potential fat-thermogenic effects of Eurotium cristatum, and elucidated the underlying mechanisms. The 12-week administration of E. cristatum in HFD-fed obese mice reduced body weight and improved glucolipid metabolism disorders. The administration of E. cristatum also efficiently promoted thermogenesis by increasing the expression of UCP1 and PRDM16 in both interscapular brown adipose tissue (iBAT) and inguinal white adipose tissue (iWAT) of HFD-fed mice. Furthermore, E. cristatum shaped the gut microbiome by increasing the abundance of Parabacteroides and Akkermansia muciniphila, and also elevated the levels of cecal short-chain fatty acids, particularly propionate and acetate. Of note, A. muciniphila was highly negatively correlated with body weight gain (r = -0.801, p < 0.05) and the iWAT index (r = -0.977, p < 0.01), suggesting that A. muciniphila may play an important role in the thermogenic mobilization induced by E. cristatum. Continuous supplementation with A. muciniphila suppressed adipose accumulation, improved glucolipid metabolism, and enhanced the thermogenic activity of iWAT and iBAT. Collectively, our results propose that boosted A. muciniphila acts as a key microbe in tea-derived probiotic E. cristatum-mediated fat-thermogenic and anti-obesity effects.
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Affiliation(s)
| | | | | | | | | | - Xingbin Yang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710119, China (T.L.)
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Wang Y, Li T, Liu Y, Yang C, Liu L, Zhang X, Yang X. Heimao tea polysaccharides ameliorate obesity by enhancing gut microbiota-dependent adipocytes thermogenesis in mice fed with high fat diet. Food Funct 2022; 13:13014-13027. [PMID: 36449351 DOI: 10.1039/d2fo02415b] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Heimao tea (HMT) is a kind of fermented dark tea that has various health benefits. However, the available information regarding the anti-obesity effect of HMT and its active ingredients is still limited. Herein, we extracted the polysaccharides from Heimao tea (HMTP) and evaluated the anti-obesity effect and the underlying mechanism of HMTP. 12-Week administration of HMTP ameliorated lipid accumulation in the adipose tissue and improved glucolipid metabolism in high-fat diet (HFD)-fed mice. HMTP also induced browning of inguinal white adipose tissue (iWAT) and enhanced the thermogenic activity of interscapular brown adipose tissue (iBAT) by upregulating the expression of a series of thermogenic genes, such as Ucp1, Prdm16, and Pgc1α. Interestingly, the anti-obesity effect of HMTP was closely associated with altered relative abundance of the gut microbes, especially Dubosiella and Romboutsia, with significant increases, in which the abundance of Dubosiella and Romboutsia was negatively correlated with the body weight (r = -0.567, p < 0.05; r = -0.407, p < 0.05) and positively correlated with the iBAT index (r = 0.520, p < 0.05; r = 0.315, p < 0.05). Our data suggest that the alteration of the gut microbiota may play a critical role in HMTP-induced iWAT browning and iBAT activation, and our findings may provide a promising way for preventing obesity.
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Affiliation(s)
- Yu Wang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
| | - Ting Li
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
| | - Yueyue Liu
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
| | - Chengcheng Yang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
| | - Lei Liu
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
| | - Xiangnan Zhang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
| | - Xingbin Yang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
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Qi L, Yang M, Chang D, Zhao W, Zhang S, Du Y, Li Y. A DNA Nanoflower-Assisted Separation-Free Nucleic Acid Detection Platform with a Commercial Pregnancy Test Strip. Angew Chem Int Ed Engl 2021; 60:24823-24827. [PMID: 34432346 DOI: 10.1002/anie.202108827] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/06/2021] [Indexed: 12/16/2022]
Abstract
There is a constant drive for affordable point-of-care testing (POCT) technologies for the detection of infectious human diseases. Herein, we report a simple platform for DNA detection that takes advantage of four techniques: commercially available pregnancy test strips (PTS), amplicon generation via loop-mediated isothermal amplification (LAMP), toehold-mediated strand displacement, and noncovalent immobilization of DNA on paper surface with DNA nanoflowers. This simple, separation-free platform is highly specific, as demonstrated with the detection of rtL180M, a single-nucleotide polymorphism observed in hepatitis B virus (HBV) associated with antiviral drug resistance. It is very sensitive, capable of detecting the targeted mutation at 2 copies μL-1 . It is able to correctly identify the unmutated and rtL180M genome types of HBV in clinical samples. Given its wide adaptability, we expect this platform can be easily modified for the detection of genetic variations associated with various pathogens and human diseases.
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Affiliation(s)
- Lijuan Qi
- State key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, P. R. China
- Department of Chemistry, University of Science and Technology of China, Anhui, P. R. China
| | - Meiting Yang
- State key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, P. R. China
| | - Dingran Chang
- Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, Ontario, L8S4K1, Canada
| | - Wenjing Zhao
- Hepatobiliary Disease Hospital of Jilin Province, Jilin, P. R. China
| | - Sicai Zhang
- State key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, P. R. China
| | - Yan Du
- State key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, P. R. China
- Department of Chemistry, University of Science and Technology of China, Anhui, P. R. China
| | - Yingfu Li
- Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, Ontario, L8S4K1, Canada
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Qi L, Yang M, Chang D, Zhao W, Zhang S, Du Y, Li Y. A DNA Nanoflower‐Assisted Separation‐Free Nucleic Acid Detection Platform with a Commercial Pregnancy Test Strip. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108827] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lijuan Qi
- State key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Jilin P. R. China
- Department of Chemistry University of Science and Technology of China Anhui P. R. China
| | - Meiting Yang
- State key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Jilin P. R. China
| | - Dingran Chang
- Department of Biochemistry and Biomedical Sciences McMaster University 1280 Main Street West Hamilton Ontario L8S4K1 Canada
| | - Wenjing Zhao
- Hepatobiliary Disease Hospital of Jilin Province Jilin P. R. China
| | - Sicai Zhang
- State key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Jilin P. R. China
| | - Yan Du
- State key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Jilin P. R. China
- Department of Chemistry University of Science and Technology of China Anhui P. R. China
| | - Yingfu Li
- Department of Biochemistry and Biomedical Sciences McMaster University 1280 Main Street West Hamilton Ontario L8S4K1 Canada
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Chu SV, Vu ST, Nguyen HM, Le NT, Truong PT, Vu VTT, Phung TTB, Nguyen ATV. Fast and Sensitive Real-Time PCR Detection of Major Antiviral-Drug Resistance Mutations in Chronic Hepatitis B Patients by Use of a Predesigned Panel of Locked-Nucleic-Acid TaqMan Probes. J Clin Microbiol 2021; 59:e0093621. [PMID: 34319801 PMCID: PMC8451437 DOI: 10.1128/jcm.00936-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/19/2021] [Indexed: 11/20/2022] Open
Abstract
We developed a novel real-time PCR assay that simultaneously evaluates 11 major nucleos(t)ide antiviral (NA) drug resistance mutations (mt) in chronic hepatitis B patients (CHB), including L180M, M204I/V, and V207M (lamivudine [LMV] resistance), N/H238A/T (adefovir [ADF] resistance), which are circulating in Vietnam; and T184G/L, S202I, and M250V (entecavir [ETV] resistance) and A194T (tenofovir resistance), which have been recently reported in several studies across the globe. We detected drug-resistant mt in hepatitis B virus (HBV) samples using our predesigned panel of allele-specific locked-nucleic acid (LNA) probes. Our assay had a high sensitivity of 5% in a low-HBV DNA population of ≥5 × 103 IU/ml and was validated in a cohort of 130 treatment-naive children and 98 NA-experienced adults with CHB. Single-point mt for LMV and ADF resistance were detected in 57.7% and 54.1% of the child and adult samples, respectively, with rtV207M (children, 42.3%; adults, 36.7%) and rtN238T/A (children, 15.4%; adults, 16.3%) being the most frequent mt in these populations. Multiple-point mt, including rtL180M-rtM204V- rtN238A and rtL180M-rtM204I, were identified in only two children, resulting in LMV-ADF resistance and reduced ETV susceptibility. In conclusion, this assay accurately identified the mt profile of children (98.4%) and adults (91.2%) with CHB, which is comparable to established methods. This fast and sensitive screening method can be used for the detection of major NA-resistant mt circulating in developing countries, as well as providing a model for the development of similar mt-detection assays, especially for use in nonhospitalized patients who need their results within half a day, before starting treatment.
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Affiliation(s)
- Son V. Chu
- Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National University, Hanoi, Hanoi, Vietnam
| | - Son T. Vu
- Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National University, Hanoi, Hanoi, Vietnam
| | - Hang M. Nguyen
- Department of Research in Molecular Biology for Infectious Diseases, National Children’s Hospital, Hanoi, Vietnam
| | - Ngan T. Le
- Department of Microbiology, Bach Mai Hospital, Hanoi, Vietnam
| | | | - Van T. T. Vu
- Department of Microbiology, Bach Mai Hospital, Hanoi, Vietnam
| | - Thuy T. B. Phung
- Department of Research in Molecular Biology for Infectious Diseases, National Children’s Hospital, Hanoi, Vietnam
| | - Anh T. V. Nguyen
- Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National University, Hanoi, Hanoi, Vietnam
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Phung TTB, Chu SV, Vu ST, Pham HT, Nguyen HM, Nguyen HD, Le NT, Nguyen DV, Truong PT, Vu VTT, Nguyen ATV. COLD-PCR Method for Early Detection of Antiviral Drug-Resistance Mutations in Treatment-Naive Children with Chronic Hepatitis B. Diagnostics (Basel) 2020; 10:diagnostics10070491. [PMID: 32708399 PMCID: PMC7400161 DOI: 10.3390/diagnostics10070491] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 02/06/2023] Open
Abstract
We investigated Nucleos(t)ide-analogue (NA)-resistance mutations (mt) in 142 treatment-naive children with Chronic Hepatitis B (CHB), using a sensitive co-amplification at lower denaturation temperature (COLD)-PCR with Sanger DNA sequencing. An NA resistance-associated mt in the hepatitis B virus (HBV) reverse transcriptase (RT) was found in 66.2% of the patients, with nonclassical mt contributing the most (64.8%). Significantly higher frequencies of Lamivudine (LMV) and Adefovir dipivoxil (ADF) resistance-associated mt were found in genotypes B and C, respectively (ORLMV/ADF: 1495.000; 95% CI: 89.800–24,889.032; p < 0.001). Single-point mt associated to LMV and ADF resistance were detected in 59.9% of the tested children with rtV207M (38.0%) and rtN238T (9.9%) being the most frequent. Multiple-point mt were found only in 8 cases (5.6%): 6 children carried double mt (rtV207M + rtL229V; rtV207M + rtI233V; rtV207I + rtV207M × 2 cases; rtV207M + rtS213T; rtN238A + rtS256G) relating to LMV or/and ADF resistance and 3 children carried triple mt (rtL180M + rtM204I + rtN238T; rtV207M + rtS213T + rtS256G) or quadruple mt (rtL180M + rtM204V + rtV207I/M) for LMV-ADF resistance and Entecavir-reduced susceptibility. Our data indicate that significantly higher frequencies of LMV and ADF-associated mutations were found in treatment-naïve children infected with HBV genotypes B and C, respectively. The developed COLD-PCR method and obtained data may contribute to the development of suitable treatments for children with CHB.
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Affiliation(s)
- Thuy Thi Bich Phung
- Department of Research in Molecular Biology for Infectious Diseases, National Children’s Hospital, Hanoi 10, Vietnam; (T.T.B.P.); (H.M.N.)
| | - Son Van Chu
- Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National University Hanoi, Hanoi 10, Vietnam; (S.V.C.); (S.T.V.); (H.T.P.)
| | - Son Thien Vu
- Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National University Hanoi, Hanoi 10, Vietnam; (S.V.C.); (S.T.V.); (H.T.P.)
| | - Hanh Thi Pham
- Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National University Hanoi, Hanoi 10, Vietnam; (S.V.C.); (S.T.V.); (H.T.P.)
| | - Hang Minh Nguyen
- Department of Research in Molecular Biology for Infectious Diseases, National Children’s Hospital, Hanoi 10, Vietnam; (T.T.B.P.); (H.M.N.)
| | - Hoan Dang Nguyen
- Department of Pediatric Gastroenterology-Nutrition-Infectious Diseases, Saint-Paul Hospital, Hanoi 10, Vietnam;
| | - Ngan Thi Le
- Department of Microbiology, Bach Mai Hospital, Hanoi 10, Vietnam; (N.T.L.); (P.T.T.); (V.T.T.V.)
| | - Dung Van Nguyen
- Center for Tropical Diseases, Bach Mai Hospital, Hanoi 10, Vietnam;
| | - Phuong Thai Truong
- Department of Microbiology, Bach Mai Hospital, Hanoi 10, Vietnam; (N.T.L.); (P.T.T.); (V.T.T.V.)
| | - Van Thi Tuong Vu
- Department of Microbiology, Bach Mai Hospital, Hanoi 10, Vietnam; (N.T.L.); (P.T.T.); (V.T.T.V.)
| | - Anh Thi Van Nguyen
- Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National University Hanoi, Hanoi 10, Vietnam; (S.V.C.); (S.T.V.); (H.T.P.)
- Correspondence:
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Mauger F, How-Kit A, Tost J. COLD-PCR Technologies in the Area of Personalized Medicine: Methodology and Applications. Mol Diagn Ther 2018; 21:269-283. [PMID: 28101802 DOI: 10.1007/s40291-016-0254-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Somatic mutations bear great promise for use as biomarkers for personalized medicine, but are often present only in low abundance in biological material and are therefore difficult to detect. Many assays for mutation analysis in cancer-related genes (hotspots) have been developed to improve diagnosis, prognosis, prediction of drug resistance, and monitoring of the response to treatment. Two major approaches have been developed: mutation-specific amplification methods and methods that enrich and detect mutations without prior knowledge on the exact location and identity of the mutation. CO-amplification at Lower Denaturation temperature Polymerase Chain Reaction (COLD-PCR) methods such as full-, fast-, ice- (improved and complete enrichment), enhanced-ice, and temperature-tolerant COLD-PCR make use of a critical temperature in the polymerase chain reaction to selectively denature wild-type-mutant heteroduplexes, allowing the enrichment of rare mutations. Mutations can subsequently be identified using a variety of laboratory technologies such as high-resolution melting, digital polymerase chain reaction, pyrosequencing, Sanger sequencing, or next-generation sequencing. COLD-PCR methods are sensitive, specific, and accurate if appropriately optimized and have a short time to results. A large variety of clinical samples (tumor DNA, circulating cell-free DNA, circulating cell-free fetal DNA, and circulating tumor cells) have been studied using COLD-PCR in many different applications including the detection of genetic changes in cancer and infectious diseases, non-invasive prenatal diagnosis, detection of microorganisms, or DNA methylation analysis. In this review, we describe in detail the different COLD-PCR approaches, highlighting their specificities, advantages, and inconveniences and demonstrating their use in different fields of biological and biomedical research.
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Affiliation(s)
- Florence Mauger
- Laboratory for Epigenetics and Environment, Centre National de Génotypage, CEA-Institut de Génomique, Batiment G2, 2 rue Gaston Crémieux, 91000, Evry, France
| | - Alexandre How-Kit
- Laboratory for Genomics, Fondation Jean Dausset-CEPH, 75010, Paris, France
| | - Jörg Tost
- Laboratory for Epigenetics and Environment, Centre National de Génotypage, CEA-Institut de Génomique, Batiment G2, 2 rue Gaston Crémieux, 91000, Evry, France.
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Huh HJ, Kim JY, Lee MK, Lee NY, Kim JW, Ki CS. Analytical and clinical evaluation of the Abbott RealTime hepatitis B sequencing assay. J Clin Virol 2016; 85:27-30. [PMID: 27816021 DOI: 10.1016/j.jcv.2016.10.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 10/22/2016] [Accepted: 10/26/2016] [Indexed: 02/06/2023]
Abstract
BACKGROUND Long-term nucleoside analogue (NA) treatment leads to selection for drug-resistant mutations in patients undergoing hepatitis B virus (HBV) therapy. The Abbott RealTime HBV Sequencing assay (Abbott assay; Abbott Molecular Inc., Des Plaines, IL, USA) targets the reverse transcriptase region of the polymerase gene and as such has the ability to detect NA resistance-associated mutations in HBV. OBJECTIVES We evaluated the analytical performance of the Abbott assay and compared its diagnostic performance to that of a laboratory-developed nested-PCR and sequencing method. STUDY DESIGN The analytical sensitivity of the Abbott assay was determined using a serially-diluted WHO International Standard. To validate the clinical performances of the Abbott assay and the laboratory-developed assay, 89 clinical plasma samples with various levels of HBV DNA were tested using both assays. RESULTS The limit of detection of the Abbott assay, was 210IU/ml and it successfully detected mutations when the mutant types were present at levels ≥20%. Among 89 clinical specimens, 43 and 42 were amplification positive in the Abbott and laboratory-developed assays, respectively, with 87.6% overall agreement (78/89; 95% confidence interval [CI], 78.6-93.4). The Abbott assay failed to detect the minor mutant populations in two specimens, and therefore overall concordance was 85.3% (76/89), and the kappa value was 0.79 (95% CI, 0.67-0.90). CONCLUSIONS The Abbott assay showed comparable diagnostic performance to laboratory-developed nested PCR followed by direct sequencing, and may be useful as a routine method for detecting HBV NA resistance-associated mutations in clinical laboratory settings.
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Affiliation(s)
- Hee Jae Huh
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ji-Youn Kim
- Center for Clinical Medicine, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Republic of Korea
| | - Myoung-Keun Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Nam Yong Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jong-Won Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Chang-Seok Ki
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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Detection of Anti-Hepatitis B Virus Drug Resistance Mutations Based on Multicolor Melting Curve Analysis. J Clin Microbiol 2016; 54:2661-2668. [PMID: 27535686 DOI: 10.1128/jcm.00439-16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 08/05/2016] [Indexed: 02/06/2023] Open
Abstract
Detection of anti-hepatitis B virus (HBV) drug resistance mutations is critical for therapeutic decisions for chronic hepatitis B virus infection. We describe a real-time PCR-based assay using multicolor melting curve analysis (MMCA) that could accurately detect 24 HBV nucleotide mutations at 10 amino acid positions in the reverse transcriptase region of the HBV polymerase gene. The two-reaction assay had a limit of detection of 5 copies per reaction and could detect a minor mutant population (5% of the total population) with the reverse transcriptase M204V amino acid mutation in the presence of the major wild-type population when the overall concentration was 104 copies/μl. The assay could be finished within 3 h, and the cost of materials for each sample was less than $10. Clinical validation studies using three groups of samples from both nucleos(t)ide analog-treated and -untreated patients showed that the results for 99.3% (840/846) of the samples and 99.9% (8,454/8,460) of the amino acids were concordant with those of Sanger sequencing of the PCR amplicon from the HBV reverse transcriptase region (PCR Sanger sequencing). HBV DNA in six samples with mixed infections consisting of minor mutant subpopulations was undetected by the PCR Sanger sequencing method but was detected by MMCA, and the results were confirmed by coamplification at a lower denaturation temperature-PCR Sanger sequencing. Among the treated patients, 48.6% (103/212) harbored viruses that displayed lamivudine monoresistance, adefovir monoresistance, entecavir resistance, or lamivudine and adefovir resistance. Among the untreated patients, the Chinese group had more mutation-containing samples than did the Pakistani group (3.3% versus 0.56%). Because of its accuracy, rapidness, wide-range coverage, and cost-effectiveness, the real-time PCR assay could be a robust tool for the detection if anti-HBV drug resistance mutations in resource-limited countries.
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