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Abdullahi AD, Unban K, Saenjum C, Kodchasee P, Kangwan N, Thananchai H, Shetty K, Khanongnuch C. Antibacterial activities of Miang extracts against selected pathogens and the potential of the tannin-free extracts in the growth inhibition of Streptococcus mutans. PLoS One 2024; 19:e0302717. [PMID: 38718045 PMCID: PMC11078415 DOI: 10.1371/journal.pone.0302717] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 04/08/2024] [Indexed: 05/12/2024] Open
Abstract
Bacterial pathogens have remained a major public health concern for several decades. This study investigated the antibacterial activities of Miang extracts (at non-neutral and neutral pH) against Bacillus cereus TISTR 747, Escherichia coli ATCC 22595, Salmonella enterica serovar Typhimurium TISTR 292 and Streptococcus mutans DMST 18777. The potential of Polyvinylpolypyrrolidone (PVPP)-precipitated tannin-free Miang extracts in growth-inhibition of the cariogenic Streptococcus mutans DMST 18777 and its biofilms was also evaluated. The tannin-rich fermented extracts had the best bacterial growth inhibition against S. mutans DMST 18777 with an MIC of 0.29 and 0.72 mg/mL for nonfilamentous fungi (NFP) Miang and filamentous-fungi-processed (FFP) Miang respectively. This observed anti-streptococcal activity still remained after PVPP-mediated precipitation of bioactive tannins especially, in NFP and FFP Miang. Characterization of the PVPP-treated extracts using High performance liquid chromatography quadrupole-time of flight-mass spectrometry (HPLC-QToF-MS) analysis, also offered an insight into probable compound classes responsible for the activities. In addition, Crystal violet-staining also showed better IC50 values for NFP Miang (4.30 ± 0.66 mg/mL) and FFP Miang (12.73 ± 0.11 mg/mL) against S. mutans DMST 18777 biofilms in vitro. Homology modeling and molecular docking analysis using HPLC-MS identified ligands in tannin-free Miang supernatants, was performed against modelled S. mutans DMST 18777 sortase A enzyme. The in silico analysis suggested that the inhibition by NFP and FFP Miang might be attributed to the presence of ellagic acid, flavonoid aglycones, and glycosides. Thus, these Miang extracts could be optimized and explored as natural active pharmaceutical ingredients (NAPIs) for applications in oral hygienic products.
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Affiliation(s)
- Aliyu Dantani Abdullahi
- Interdisciplinary Program in Biotechnology, The Graduate School, Chiang Mai University, Muang, Chiang Mai, Thailand
| | - Kridsada Unban
- Faculty of Agro-Industry, Division of Food Science and Technology, School of Agro-Industry, Chiang Mai University, Muang, Chiang Mai, Thailand
| | - Chalermpong Saenjum
- Faculty of Pharmacy, Department of Pharmaceutical Sciences, Chiang Mai University, Muang, Chiang Mai, Thailand
| | - Pratthana Kodchasee
- Research Center for Multidisciplinary Approaches to Miang, Multidisciplinary Research Institute (MDRI), Chiang Mai University, Muang, Chiang Mai, Thailand
| | - Napapan Kangwan
- Division of Physiology, School of Medical Sciences, University of Phayao, Phayao, Thailand
| | - Hathairat Thananchai
- Faculty of Medicine, Department of Microbiology, Chiang Mai University, Muang, Chiang Mai, Thailand
| | - Kalidas Shetty
- Faculty of Agriculture, Department of Plant Sciences, North Dakota State University, Fargo, North Dakota, United States of America
| | - Chartchai Khanongnuch
- Research Center for Multidisciplinary Approaches to Miang, Multidisciplinary Research Institute (MDRI), Chiang Mai University, Muang, Chiang Mai, Thailand
- Faculty of Science, Department of Biology, Chiang Mai University, Chiang Mai, Thailand
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai, Thailand
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Pakdeerat S, Boonklang P, Angchagun K, Chomkatekaew C, Apichaidejudom N, Dokket Y, Faosap A, Wongsuwan G, Wuthiekanun V, Aramrueung P, Khamnoi P, Thananchai H, Siriboon S, Chamnan P, Peacock SJ, Day NPJ, Thomson NR, Uttamapinant C, Wongpalee SP, Chewapreecha C. Benchmarking CRISPR-BP34 for point-of-care melioidosis detection in low-income and middle-income countries: a molecular diagnostics study. Lancet Microbe 2024; 5:e379-e389. [PMID: 38493790 PMCID: PMC10990966 DOI: 10.1016/s2666-5247(23)00378-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 10/17/2023] [Accepted: 11/16/2023] [Indexed: 03/19/2024]
Abstract
BACKGROUND Melioidosis is a neglected but often fatal tropical disease. The disease has broad clinical manifestations, which makes diagnosis challenging and time consuming. To improve diagnosis, we aimed to evaluate the performance of the CRISPR-Cas12a system (CRISPR-BP34) to detect Burkholderia pseudomallei DNA across clinical specimens from patients suspected to have melioidosis. METHODS We conducted a prospective, observational cohort study of adult patients (aged ≥18 years) with melioidosis at Sunpasitthiprasong Hospital, a tertiary care hospital in Thailand. Participants were eligible for inclusion if they had culture-confirmed B pseudomallei infection from any clinical samples. Data were collected from patient clinical records and follow-up telephone calls. Routine clinical samples (blood, urine, respiratory secretion, pus, and other body fluids) were collected for culture. We documented time taken for diagnosis, and mortality at day 28 of follow-up. We also performed CRISPR-BP34 detection on clinical specimens collected from 330 patients with suspected melioidosis and compared its performance with the current gold-standard culture-based method. Discordant results were validated by three independent qualitative PCR tests. This study is registered with the Thai Clinical Trial Registry, TCTR20190322003. FINDINGS Between Oct 1, 2019, and Dec 31, 2022, 876 patients with culture-confirmed melioidosis were admitted or referred to Sunpasitthiprasong Hospital, 433 of whom were alive at diagnosis and were enrolled in this study. Median time from sample collection to diagnosis by culture was 4·0 days (IQR 3·0-5·0) among all patients with known survival status at day 28, which resulted in delayed treatment. 199 (23%) of 876 patients died before diagnosis and 114 (26%) of 433 patients in follow-up were treated, but died within 28 days of admission. To test the CRISPR-BP34 assay, we enrolled and collected clinical samples from 114 patients with melioidosis and 216 patients without melioidosis between May 26 and Dec 31, 2022. Application of CRISPR-BP34 reduced the median sample-to-diagnosis time to 1·1 days (IQR 0·7-1·5) for blood samples, 2·3 h (IQR 2·3-2·4) for urine, and 3·3 h (3·1-3·4) for respiratory secretion, pus, and other body fluids. The overall sensitivity of CRISPR-BP34 was 93·0% (106 of 114 samples [95% CI 86·6-96·9]) compared with 66·7% (76 of 114 samples [57·2-75·2]) for culture. The overall specificity of CRISPR-BP34 was 96·8% (209 of 216 samples [95% CI 93·4-98·7]), compared with 100% (216 of 216 samples [98·3-100·0]) for culture. INTERPRETATION The sensitivity, specificity, speed, and window of clinical intervention offered by CRISPR-BP34 support its prospective use as a point-of-care diagnostic tool for melioidosis. Future development should be focused on scalability and cost reduction. FUNDING Chiang Mai University Thailand and Wellcome Trust UK.
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Affiliation(s)
- Sukripong Pakdeerat
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Phumrapee Boonklang
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Kesorn Angchagun
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Chalita Chomkatekaew
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Navaporn Apichaidejudom
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Yaowaret Dokket
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Areeya Faosap
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Gumphol Wongsuwan
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Vanaporn Wuthiekanun
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Panatda Aramrueung
- Central Laboratory, Sunpasitthiprasong Hospital, Ubon Ratchathani, Thailand
| | - Phadungkiat Khamnoi
- Diagnostic Laboratory, Maharaj Nakorn Chiang Mai Hospital, Chiang Mai, Thailand
| | - Hathairat Thananchai
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Suwattiya Siriboon
- Department of Infectious Medicine, Sunpasitthiprasong Hospital, Ubon Ratchathani, Thailand
| | - Parinya Chamnan
- Cardiometabolic Research Group, Department of Social Medicine, Sunpasitthiprasong Hospital, Ubon Ratchathani, Thailand
| | | | - Nicholas P J Day
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Nicholas R Thomson
- Parasites and Microbes Programme, Wellcome Sanger Institute, Hinxton, UK
| | - Chayasith Uttamapinant
- School of Biomolecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, Thailand
| | - Somsakul Pop Wongpalee
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
| | - Claire Chewapreecha
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand; Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand; Parasites and Microbes Programme, Wellcome Sanger Institute, Hinxton, UK.
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Kaewrakmuk J, Chusri S, Hortiwakul T, Kawila S, Patungkaro W, Jariyapradub B, Limvorapan P, Chiewchanyont B, Thananchai H, Duangsonk K, Tuanyok A. Under-Reporting Cases and Deaths from Melioidosis: A Retrospective Finding in Songkhla and Phatthalung Province of Southern Thailand, 2014-2020. Trop Med Infect Dis 2023; 8:tropicalmed8050286. [PMID: 37235334 DOI: 10.3390/tropicalmed8050286] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
Melioidosis, caused by Burkholderia pseudomallei, is a notifiable disease associated with a high mortality rate in Thailand. The disease is highly endemic in northeast Thailand, while its prevalence in other parts of the country is poorly documented. This study aimed at improving the surveillance system for melioidosis in southern Thailand, where the disease was believed to be underreported. Two adjacent southern provinces, Songkhla and Phatthalung, were selected as the model provinces to study melioidosis. There were 473 individuals diagnosed with culture-confirmed melioidosis by clinical microbiology laboratories at four tertiary care hospitals in both provinces from January 2014 to December 2020. The median age was 54 years (IQR 41.5-64), 284 (60%) of the patients were adults ≥50 years of age, and 337 (71.2%) were male. We retrospectively analyzed 455 patients treated at either Songklanarind Hospital, Hatyai Hospital, Songkhla Provincial Hospital, or Phatthalung Provincial Hospital, of whom 181 (39.8%) patients died. The median duration from admission to death was five days (IQR 2-17). Of the 455 patients, 272 (57.5%) had at least one clinical risk factor, and 188 (39.8%) had diabetes. Two major clinical manifestations, bacteremia and pneumonia, occurred in 274 (58.1%) and 166 (35.2%) patients, respectively. In most cases, 298 (75%) out of 395 local patients were associated with rainfall. Over the seven years of the study, the average annual incidence was 2.87 cases per 100,000 population (95% CI, 2.10 to 3.64). This study has confirmed that these two provinces of southern Thailand are endemic to melioidosis; even though the incidence rate is much lower than that of the Northeast, the mortality rate is comparably high.
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Affiliation(s)
- Jedsada Kaewrakmuk
- Faculty of Medical Technology, Prince of Songkla University, Hatyai, Songkhla 90110, Thailand
- Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Sarunyou Chusri
- Faculty of Medicine, Prince of Songkla University, Hatyai, Songkhla 90110, Thailand
| | - Thanaporn Hortiwakul
- Faculty of Medicine, Prince of Songkla University, Hatyai, Songkhla 90110, Thailand
| | - Soontara Kawila
- Faculty of Medicine, Prince of Songkla University, Hatyai, Songkhla 90110, Thailand
| | | | | | | | | | | | - Kwanjit Duangsonk
- Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Apichai Tuanyok
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, Gainesville, FL 32608, USA
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Piyajaroenkij T, Tantiworawit A, Khikhuntod J, Piriyakhuntorn P, Rattanathammethee T, Hantrakool S, Chai-Adisaksopha C, Rattarittamrong E, Norasetthada L, Fanhchaksai K, Charoenkwan P, Thananchai H. Alteration of monocyte subsets and their functions in thalassemia patients. Int J Hematol 2023; 117:188-197. [PMID: 36323999 PMCID: PMC9889407 DOI: 10.1007/s12185-022-03484-9] [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: 08/24/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 11/07/2022]
Abstract
Infection is one of the leading causes of mortality in thalassemia patients. This study aimed to examine qualitative and quantitative changes in monocytes in thalassemia patients. Monocytes were isolated from peripheral blood mononuclear cells and separated into subpopulations by flow cytometry. Cytokine levels were measured using quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) and sandwich enzyme-linked immunosorbent assay (ELISA). The primary endpoint was monocyte-derived TNF-α expression. A total of 78 patients and 26 controls were included. The mean log (TNF-α fold-change) by qRT-PCR was significantly lower in all thalassemia groups, at 1.27 in controls, versus 0.97 (p = 0.0014) in non-transfusion-dependent thalassemia (NTDT), 0.96 (p = 0.0004) in non-splenectomized transfusion-dependent thalassemia (TDT-NS), and 0.87 (p < 0.0001) in splenectomized transfusion-dependent thalassemia (TDT-S). Similarly, the mean 2-h TNF-α level measured by sandwich ELISA assay was significantly lower in all thalassemia groups, at 98.16 pg/mL in controls, versus 56.45 pg/mL (p = 0.0093) in NTDT, 39.05 pg/mL (p = 0.0001) in TDT-NS and 32.37 pg/mL (p < 0.0001) in TDT-S. Likewise, TDT patients had a significantly decreased percentage of non-classical monocytes, by approximately half compared to controls. Our results show that thalassemia major patients have clearly impaired monocyte counts and function.
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Affiliation(s)
- Thanakrit Piyajaroenkij
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand ,grid.10223.320000 0004 1937 0490Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Adisak Tantiworawit
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand
| | - Jeeraphong Khikhuntod
- grid.7132.70000 0000 9039 7662Division of Immunology, Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Pokpong Piriyakhuntorn
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand
| | - Thanawat Rattanathammethee
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand
| | - Sasinee Hantrakool
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand
| | - Chatree Chai-Adisaksopha
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand
| | - Ekarat Rattarittamrong
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand
| | - Lalita Norasetthada
- grid.7132.70000 0000 9039 7662Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, 110 Intravaroros Road, A. Muang50200, Chiang Mai, Thailand
| | - Kanda Fanhchaksai
- grid.7132.70000 0000 9039 7662Division of Hematology and Oncology, Department of Pediatrics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Pimlak Charoenkwan
- grid.7132.70000 0000 9039 7662Division of Hematology and Oncology, Department of Pediatrics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Hathairat Thananchai
- grid.7132.70000 0000 9039 7662Division of Immunology, Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
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Wongpalee SP, Thananchai H, Chewapreecha C, Roslund HB, Chomkatekaew C, Tananupak W, Boonklang P, Pakdeerat S, Seng R, Chantratita N, Takarn P, Khamnoi P. Highly specific and sensitive detection of Burkholderia pseudomallei genomic DNA by CRISPR-Cas12a. PLoS Negl Trop Dis 2022; 16:e0010659. [PMID: 36037185 PMCID: PMC9423629 DOI: 10.1371/journal.pntd.0010659] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 07/12/2022] [Indexed: 11/18/2022] Open
Abstract
Detection of Burkholderia pseudomallei, a causative bacterium for melioidosis, remains a challenging undertaking due to long assay time, laboratory requirements, and the lack of specificity and sensitivity of many current assays. In this study, we are presenting a novel method that circumvents those issues by utilizing CRISPR-Cas12a coupled with isothermal amplification to identify B. pseudomallei DNA from clinical isolates. Through in silico search for conserved CRISPR-Cas12a target sites, we engineered the CRISPR-Cas12a to contain a highly specific spacer to B. pseudomallei, named crBP34. The crBP34-based detection assay can detect as few as 40 copies of B. pseudomallei genomic DNA while discriminating against other tested common pathogens. When coupled with a lateral flow dipstick, the assay readout can be simply performed without the loss of sensitivity and does not require expensive equipment. This crBP34-based detection assay provides high sensitivity, specificity and simple detection method for B. pseudomallei DNA. Direct use of this assay on clinical samples may require further optimization as these samples are complexed with high level of human DNA. Melioidosis is a fatal infectious disease caused by a Gram-negative bacterium called Burkholderia pseudomallei. The bacteria can be found in many parts of the world, especially in the tropical and subtropical regions. Infection displays a variety of symptoms such as pneumonia, organ abscess and septicemia. The latter can lead to death within 24–48 hours if not properly diagnosed and treated. Rapid and accurate diagnosis, consequently, are essential for saving patients’ lives. Currently, culturing B. pseudomallei is a gold standard diagnostic method, but the assay turnaround time is 2–4 days, and the result could be of low sensitivity. Other detection methods such as real-time PCR and serological assays are limited by availability of equipment and by low specificity in endemic areas, respectively. For these reasons, in this study we developed a specific, sensitive and rapid detection assay for B. pseudomallei DNA, that is based on CRISPR-Cas12a system. The CRISPR-Cas12a is a protein-RNA complex that recognizes DNA. The RNA can be reprogramed to guide the detection of any DNA of interest, which in our case B. pseudomallei genomic DNA. Our data showed that this assay exhibited a 100% specificity to B. pseudomallei while discriminating against 10 other pathogens and human. The assay can detect B. pseudomallei DNA in less than one hour and does not require sophisticated equipment.
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Affiliation(s)
- Somsakul Pop Wongpalee
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
- * E-mail:
| | - Hathairat Thananchai
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Claire Chewapreecha
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Parasites and Microbes Programme, Wellcome Sanger Institute, Hinxton, United Kingdom
| | - Henrik B. Roslund
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Chalita Chomkatekaew
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Warunya Tananupak
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Phumrapee Boonklang
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Sukritpong Pakdeerat
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Rathanin Seng
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Narisara Chantratita
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Piyawan Takarn
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Phadungkiat Khamnoi
- Microbiology Unit, Diagnostic Laboratory, Maharaj Nakorn Chiang Mai Hospital, Chiang Mai, Thailand
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Aronthippaitoon Y, Samer W, Atuntee T, Thananchai H, Thongkorn K, Pongsopawijit P, Inoue S, Noguchi A, Park ES, Kawai A, Petsophonsakul W. A Cost Effective Easy Competitive Enzyme-Linked Immunosorbent Assay Suitable for Monitoring Protective Immunity against the Rabies Virus in the Serum of Humans and Dogs. Jpn J Infect Dis 2018; 72:99-105. [PMID: 30381684 DOI: 10.7883/yoken.jjid.2018.248] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 11/17/2022]
Abstract
The coverage of rabies vaccinations has been reported at 70-80% of dogs in annual reports. However, there are still outbreaks of rabies among humans and dogs in Thailand, thus indicating the necessity of ensuring seroprevalence in vaccinated dogs and efficacy of human immunization. A cost effective easy competitive enzyme-linked immunosorbent assay (CEE-cELISA) was developed here for monitoring protective immunity against the rabies virus in human and dog serum samples using monoclonal antibody clone 1-46-12, which recognizes a conformational epitope of the rabies G protein. The ELISA plate is coated with the whole viral antigen from a commercial vaccine. The serotiter measured by the CEE-cELISA and by the gold standard assay (rapid fluorescent focus inhibition test), detecting the neutralizing antibody, showed a strong correlation, with an R value of 0.958 and 0.931 in humans and dogs, respectively. These correlations were detected in the serum samples from humans and dogs at antibody concentrations up to 100 and 10 IU/ml, respectively. This CEE-cELISA could be an alternative assay for evaluating mass rabies vaccination rapidly at a low cost as well as for detecting antirabies antibodies in the serum of not only humans but also other animal species.
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Affiliation(s)
| | - Waraporn Samer
- Faculty of Associated Medical Sciences, Chiang Mai University
| | - Thitima Atuntee
- Faculty of Associated Medical Sciences, Chiang Mai University
| | | | | | | | - Satoshi Inoue
- Department of Veterinary Science, National Institute of Infectious Diseases
| | - Akira Noguchi
- Department of Veterinary Science, National Institute of Infectious Diseases
| | - Eun-Sil Park
- Department of Veterinary Science, National Institute of Infectious Diseases
| | | | - Wilaiwan Petsophonsakul
- Department of Microbiology, Faculty of Medicine, Chiang Mai University.,Lanna Dog Welfare, Humane Education Center
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Bhoopat L, Srichairatanakool S, Kanjanapothi D, Taesotikul T, Thananchai H, Bhoopat T. Hepatoprotective effects of lychee (Litchi chinensis Sonn.): a combination of antioxidant and anti-apoptotic activities. J Ethnopharmacol 2011; 136:55-66. [PMID: 21540102 DOI: 10.1016/j.jep.2011.03.061] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 03/16/2011] [Accepted: 03/26/2011] [Indexed: 05/23/2023]
Abstract
AIM OF THE STUDY Gimjeng and Chakapat lychee (Litchi chinensis Sonn.) were evaluated for hepatoprotective activity on CCl(4)-induced hepatotoxicity in rats. MATERIALS AND METHODS Fruit pulp extracts of the lychees were examined for vitamin C, phenolic contents, anti-lipid peroxidation activity and hepatoprotective effect. Male Wistar albino rats were intraperitoneally injected (ip) with CCl(4) (2 ml/kg), then were orally administered (po) with silymarin (100mg/kg), and Gimjeng or Chakapat extracts (100 and 500 mg/kg). After ten days, the rats were sacrificed and their livers were examined histopathologically and immunohistochemically. Their serum glutamate-pyruvate transaminase, glutamate-oxalate transaminase, and alkaline phosphatase activities were analyzed. Apoptotic activity of the livers was assessed quantitatively. RESULTS The Gimjeng and Chakapat extracts showed the contents of vitamin C (1.2±0.6 and 4.3±0.1mg/100g) and phenolics like trans-cinnamic acid and pelargonidin-3-O-glucoside (9.80±0.21 and 19.56±0.4 mg GAE/g extract, respectively), and trolox equivalent antioxidant capacity (TEAC) values (11.64 and 9.09 g/mg trolox), respectively. The Gimjeng as compared to the Chakapat demonstrated a better antioxidant activity as revealed by anti-lipid peroxidation activity with the TEAC values. Administration of CCl(4) in rats elevated the serum GPT, GOT, and ALP level whereas silymarin, Gimjeng and Chakapat extracts prevented these increases significantly. Significant decrease of apoptotic cells together with restoration of morphological changes confirmed the hepatoprotective effect in the CCl(4)-induced rats pretreated with the extracts. CONCLUSION Antioxidant properties of the Gimjeng and Chakapat lychees as evidenced by the vitamin C and phenolic compounds, anti-lipid peroxidation and anti-apoptosis could explain the hepatoprotective effects in CCl(4)-induced hepatotoxicity.
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Affiliation(s)
- Lertlakana Bhoopat
- Department of Pathology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
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Sharma D, Bastard K, Guethlein LA, Norman PJ, Yawata N, Yawata M, Pando M, Thananchai H, Dong T, Rowland-Jones S, Brodsky FM, Parham P. Dimorphic motifs in D0 and D1+D2 domains of killer cell Ig-like receptor 3DL1 combine to form receptors with high, moderate, and no avidity for the complex of a peptide derived from HIV and HLA-A*2402. J Immunol 2009; 183:4569-82. [PMID: 19752231 PMCID: PMC2827337 DOI: 10.4049/jimmunol.0901734] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Comparison of mutant killer cell Ig-like receptor (KIR) 3DL1*015 substituted at natural positions of variation showed that tryptophan/leucine dimorphism at position 283 uniquely changes receptor conformation and can strongly influence binding of the A24nef tetramer. Dimorphic motifs at positions 2, 47, and 54 in D0 and 182 and 283 in D1+D2 distinguish the two 3DL1 lineages, typified by 3DL1*005 and 3DL1*015. The interlineage recombinant, KIR3DL1*001, combines D0 of 3DL1*005 with D1+D2 of 3DL1*015 and binds A24nef more strongly than either parent. In contrast, the reciprocal recombinant with D0 from 3DL1*015 and D1+D2 from 3DL1*005 cannot bind A24nef. Thus, D0 polymorphism directly affects the avidity of the KIR3DL1 ligand binding site. From these observations, multiple sequence alignment, and homology modeling, we constructed structural models for KIR3DL1 and its complex with A24nef. In these models, D0, D1, and D2 come together to form a binding surface for A24nef, which is contacted by all three Ig-like domains. A central pocket binds arginine 83, the only Bw4 motif residue essential for KIR3DL1 interaction, similar to the binding of lysine 80 in HLA-C by KIR2DL1. Central to this interaction is a salt bridge between arginine 83 of Bw4 and glutamate 282 of 3DL1, which juxtaposes the functionally influential dimorphism at position 283. Further 3DL1 mutants were tested and shown to have A24nef-binding properties consistent with the models. A24nef was not bound by KIR3DS1, the activating counterpart of KIR3DL1. Moreover, introducing any one of three residues specific to KIR3DS1, serine 163, arginine 166, or leucine 199, into 3DL1*015, abrogated A24nef binding.
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MESH Headings
- Amino Acid Motifs/genetics
- Amino Acid Motifs/immunology
- Amino Acid Sequence
- Amino Acid Substitution/genetics
- Amino Acid Substitution/immunology
- Antibody Affinity/genetics
- Gene Products, nef/genetics
- Gene Products, nef/metabolism
- HLA-A Antigens/genetics
- HLA-A Antigens/metabolism
- HLA-A24 Antigen
- HLA-B Antigens/genetics
- HLA-B Antigens/metabolism
- Humans
- Jurkat Cells
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Killer Cells, Natural/virology
- Leucine/genetics
- Leucine/metabolism
- Membrane Proteins/genetics
- Membrane Proteins/metabolism
- Molecular Sequence Data
- Mutagenesis, Site-Directed
- Polymorphism, Genetic/immunology
- Protein Binding/genetics
- Protein Binding/immunology
- Protein Structure, Tertiary/genetics
- Receptors, KIR3DL1/genetics
- Receptors, KIR3DL1/immunology
- Receptors, KIR3DL1/metabolism
- Tryptophan/genetics
- Tryptophan/metabolism
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Affiliation(s)
- Deepti Sharma
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Karine Bastard
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
- UMR CNRS 6204, Faculté des Sciences et des Techniques, Université de Nantes, France
| | - Lisbeth A. Guethlein
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Paul J. Norman
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Nobuyo Yawata
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Makoto Yawata
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Marcelo Pando
- Histocompatibility, Immunogenetics & Disease Profiling Laboratory, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Hathairat Thananchai
- Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, Oxford, United Kingdom
| | - Tao Dong
- Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, Oxford, United Kingdom
| | - Sarah Rowland-Jones
- Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, Oxford, United Kingdom
| | - Frances M. Brodsky
- Departments of Bioengineering and Therapeutic Sciences, and Microbiology and Immunology, University of California San Francisco, San Francisco, USA
| | - Peter Parham
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
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Thananchai H, Gillespie G, Martin MP, Bashirova A, Yawata N, Yawata M, Easterbrook P, McVicar DW, Maenaka K, Parham P, Carrington M, Dong T, Rowland-Jones S. Cutting Edge: Allele-specific and peptide-dependent interactions between KIR3DL1 and HLA-A and HLA-B. J Immunol 2007; 178:33-7. [PMID: 17182537 DOI: 10.4049/jimmunol.178.1.33] [Citation(s) in RCA: 191] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although it is clear that KIR3DL1 recognizes Bw4(+) HLA-B, the role of Bw4(+) HLA-A allotypes as KIR3DL1 ligands is controversial. We therefore examined the binding of tetrameric HLA-A and -B complexes, including HLA*2402, a common Bw4(+) HLA-A allotype, to KIR3DL1*001, *005, *007, and *1502 allotypes. Only Bw4(+) tetramers bound KIR3DL1. Three of four HLA-A*2402 tetramers bound one or more KIR3DL1 allotypes and all four KIR3DL1 allotypes bound to one or more HLA-A*2402 tetramers, but with different binding specificities. Only KIR3DL1*005 bound both HLA-A*2402 and HLA-B*5703 tetramers. HLA-A*2402-expressing target cells were resistant to lysis by NK cells expressing KIR3DL1*001 or *005. This study shows that HLA-A*2402 is a ligand for KIR3DL1 and demonstrates how the binding of KIR3DL1 to Bw4(+) ligands depends upon the bound peptide as well as HLA and KIR3DL1 polymorphism.
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Affiliation(s)
- Hathairat Thananchai
- Medical Research Council Human Immunology Unit, Weatherall Institute of Molecular Medicine, Oxford, United Kingdom
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Hansasuta P, Dong T, Thananchai H, Weekes M, Willberg C, Aldemir H, Rowland-Jones S, Braud VM. Recognition of HLA-A3 and HLA-A11 by KIR3DL2 is peptide-specific. Eur J Immunol 2004; 34:1673-9. [PMID: 15162437 DOI: 10.1002/eji.200425089] [Citation(s) in RCA: 248] [Impact Index Per Article: 12.4] [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
The recognition of MHC class I molecules by killer cell immunoglobulin-like receptors (KIR) is central to the control of NK cell function and can also modulate the CTL activation threshold. Among KIR receptors, KIR3DL2 is thought to interact with HLA-A3 and -A11, although direct evidence has been lacking. In this study, we show that HLA-A3 and -A11 tetramers specifically bind to KIR3DL2*001 transfectants and that this recognition is peptide-specific. Single amino acid substitutions in the nonamer peptide underline a critical role for residue 8 in recognition of KIR3DL2. However, the role of this interaction in vivo still remains to be established.
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Affiliation(s)
- Pokrath Hansasuta
- Faculty of Medicine, King Chulalongkorn Memorial Hospital, Chulalongkorn University, Bangkok, Thailand
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