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Kansuttiviwat C, Lertwilaiwittaya P, Roothumnong E, Nakthong P, Dungort P, Meesamarnpong C, Tansa-Nga W, Pongsuktavorn K, Wiboonthanasarn S, Tititumjariya W, Phuphuripan N, Lertbussarakam C, Wattanarangsan J, Sritun J, Punuch K, Kammarabutr J, Mutirangura P, Thongnoppakhun W, Limwongse C, Pithukpakorn M. Germline mutations of 4567 patients with hereditary breast-ovarian cancer spectrum in Thailand. NPJ Genom Med 2024; 9:9. [PMID: 38355628 PMCID: PMC10866978 DOI: 10.1038/s41525-024-00400-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 01/29/2024] [Indexed: 02/16/2024] Open
Abstract
Multi-gene panel testing has led to the detection of pathogenic/likely pathogenic (P/LP) variants in many cancer susceptibility genes in patients with breast-ovarian cancer spectrum. However, the clinical and genomic data of Asian populations, including Thai cancer patients, was underrepresented, and the clinical significance of multi-gene panel testing in Thailand remains undetermined. In this study, we collected the clinical and genetic data from 4567 Thai patients with cancer in the hereditary breast-ovarian cancer (HBOC) spectrum who underwent multi-gene panel testing. Six hundred and ten individuals (13.4%) had germline P/LP variants. Detection rates of germline P/LP variants in breast, ovarian, pancreatic, and prostate cancer were 11.8%, 19.8%, 14.0%, and 7.1%, respectively. Non-BRCA gene mutations accounted for 35% of patients with germline P/LP variants. ATM was the most common non-BRCA gene mutation. Four hundred and thirty-two breast cancer patients with germline P/LP variants (80.4%) met the current NCCN genetic testing criteria. The most common indication was early-onset breast cancer. Ten patients harbored double pathogenic variants in this cohort. Our result showed that a significant proportion of non-BRCA P/LP variants were identified in patients with HBOC-related cancers. These findings support the benefit of multi-gene panel testing for inherited cancer susceptibility among Thai HBOC patients. Some modifications of the testing policy may be appropriate for implementation in diverse populations.
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Affiliation(s)
- Chalermkiat Kansuttiviwat
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pongtawat Lertwilaiwittaya
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Ekkapong Roothumnong
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Panee Nakthong
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Peerawat Dungort
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chutima Meesamarnpong
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Warisara Tansa-Nga
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Khontawan Pongsuktavorn
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Supakit Wiboonthanasarn
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Warunya Tititumjariya
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nannipa Phuphuripan
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Jantanee Wattanarangsan
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Jiraporn Sritun
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kittiporn Punuch
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Jirayu Kammarabutr
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pornthira Mutirangura
- Department of Medicine, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Wanna Thongnoppakhun
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Manop Pithukpakorn
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Kulsirichawaroj P, Suksangkharn Y, Nam DE, Pho-iam T, Limwongse C, Chung KW, Sanmaneechai O, Zuchner SL, Choi BO. Gene Distribution in Pediatric-Onset Inherited Peripheral Neuropathy: A Single Tertiary Center in Thailand. J Neuromuscul Dis 2024; 11:191-199. [PMID: 37927275 PMCID: PMC10789325 DOI: 10.3233/jnd-230174] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND Inherited peripheral neuropathy presents a diagnostic and therapeutic challenge due to its association with mutations in over 100 genes. This condition leads to long-term disability and poses a substantial healthcare burden on society. OBJECTIVE This study aimed to investigate the distribution of genes and establish the genotype-phenotype correlations, focusing on pediatric-onset cases. METHODS Exome sequencing and other analytical techniques were employed to identify pathogenic variants, including duplication analysis of the PMP22 gene. Each patient underwent physical examination and electrophysiological studies. Genotypes were correlated with phenotypic features, such as age at disease onset and ulnar motor nerve conduction velocity. RESULTS We identified 35 patients with pediatric-onset inherited peripheral neuropathy. Pathogenic or likely pathogenic variants were confirmed in 24 out of 35 (68.6%) patients, with 4 of these variants being novel. A confirmed molecular diagnosis was achieved in 90.9% (10/11) of patients with demyelinating Charcot-Marie-Tooth disease (CMT) and 56.3% (9/16) of patients with axonal CMT. Among patients with infantile-onset CMT (≤2 years), the most common causative genes were MFN2 and NEFL, while GDAP1 and MFN2 were frequent causes among patients with childhood- or adolescent-onset CMT (3-9 years). CONCLUSIONS The MFN2 gene was the most commonly implicated gene, and the axonal type was predominant in this cohort of Thai patients with pediatric-onset inherited peripheral neuropathy.
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Affiliation(s)
- Pimchanok Kulsirichawaroj
- Department of Pediatrics, Faculty of Medicine, Siriraj Hospital, Mahidol University, Nakhon Pathom, Thailand
| | - Yanin Suksangkharn
- Institute of Cognitive Neurology and Dementia Research, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
| | - Da Eun Nam
- Department of Biological Sciences, Kongju National University, Gongju, Korea
| | - Theeraphong Pho-iam
- Siriraj Genomics, Office of the Dean, Faculty of Medicine, Siriraj Hospital, Mahidol University, Nakhon Pathom, Thailand
| | - Chanin Limwongse
- Siriraj Genomics, Office of the Dean, Faculty of Medicine, Siriraj Hospital, Mahidol University, Nakhon Pathom, Thailand
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Nakhon Pathom, Thailand
| | - Ki Wha Chung
- Department of Biological Sciences, Kongju National University, Gongju, Korea
| | - Oranee Sanmaneechai
- Department of Pediatrics, Faculty of Medicine, Siriraj Hospital, Mahidol University, Nakhon Pathom, Thailand
- Center of Research Excellence for Neuromuscular Diseases, Faculty of Medicine, Siriraj Hospital, Mahidol University, Nakhon Pathom, Thailand
| | - Stephan L. Zuchner
- Department of Human Genetics, University of Miami Health System, Miami, FL, USA
| | - Byung-Ok Choi
- Department of Neurology, Samsung Medical Center, and Samsung Advanced Institute for Health Science & Tech, Sungkyunkwan University School of Medicine, Seoul, Korea
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Hantaweepant C, Suktitipat B, Pithukpakorn M, Chinthammitr Y, Limwongse C, Tansiri N, Sawatnatee S, Takpradit C, Rotchanapanya W, Pongudom S, Charoenprasert K, Paiboonsukwong K, Thamprasert W, Nolwachai N, Rattanasawat W, Sae-Aeng B, Khorwanichakij N, Saetow P, Saengboon S, Kamjornpreecha K, Pholmoo W, Dujjawan B, Siritanaratkul N. Whole exome sequencing and rare variant association study to identify genetic modifiers, KLF1 mutations, and a novel double mutation in Thai patients with hemoglobin E/beta-thalassemia. Hematology 2023; 28:2187155. [PMID: 36939018 DOI: 10.1080/16078454.2023.2187155] [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] [Subscribe] [Scholar Register] [Indexed: 03/21/2023] Open
Abstract
OBJECTIVES Clinical manifestations of patients with Hemoglobin E/beta-thalassemia vary from mild to severe phenotypes despite exhibiting the same genotype. Studies have partially identified genetic modifiers. We aimed to study the association between rare variants in protein-coding regions and clinical severity in Thai patients. METHODS From April to November 2018, a case-control study was conducted based on clinical information and DNA samples collected from Thai patients with hemoglobin E/beta-thalassemia over the age of four years. Cases were patients with severe symptoms, while patients with mild symptoms acted as controls. Whole exome sequencing and rare variant association study were used to analyze the data. RESULTS All 338 unrelated patients were classified into 165 severe and 173 mild cases. Genotypes comprised 81.4% of hemoglobin E/beta-thalassemia, 2.7% of homozygous or compound heterozygous beta-thalassemia, and 0.3% of (δβ)0 thalassemia Hb E while 15.7% of samples were not classified as beta-thalassemia. A novel cis heterozygotes of IVS I-7 (A > T) and codon 26 (G > A) was identified. Six genes (COL4A3, DLK1, FAM186A, PZP, THPO, and TRIM51) showed the strongest associations with severity (observed p-values of <0.05; significance lost after correction for multiplicity). Among known modifiers, KLF1 variants were found in four mild patients and one severe patient. CONCLUSION No rare variants were identified as contributors to the clinical heterogeneity of hemoglobin E/beta-thalassemia. KLF1 mutations are potential genetic modifiers. Studies to identify genetic factors are still important and helpful for predicting severity and developing targeted therapy.
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Affiliation(s)
- Chattree Hantaweepant
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Bhoom Suktitipat
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Integrative Computational BioScience (ICBS) Center, Mahidol University, Nakhon Pathom, Thailand
| | - Manop Pithukpakorn
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Siriraj Genomics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Yingyong Chinthammitr
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nawaporn Tansiri
- Division of Hematology, Department of Medicine, Uttaradit Hospital, Uttaradit, Thailand
| | - Surasak Sawatnatee
- Division of Hematology, Department of Medicine, Sunpasitthiprasong Hospital, Ubon Ratchathani, Thailand
| | - Chayamon Takpradit
- Division of Hematology-Oncology, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wannaphorn Rotchanapanya
- Division of Hematology, Department of Medicine, Chiangrai Prachanukroh Hospital, Chiangrai, Thailand
| | - Saranya Pongudom
- Division of Hematology, Department of Medicine, Udonthani Hospital, Udonthani, Thailand
| | | | - Kittiphong Paiboonsukwong
- Thalassemia Research Center, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
| | - Wichuda Thamprasert
- Division of Hematology, Department of Medicine, Nakhon Pathom Hospital, Nakhon Pathom, Thailand
| | - Narumol Nolwachai
- Division of Hematology, Department of Medicine, Saraburi Hospital, Saraburi, Thailand
| | - Wanlapa Rattanasawat
- Division of Hematology, Department of Medicine, Charoenkrung Pracharak Hospital, Bangkok, Thailand
| | - Busakorn Sae-Aeng
- Division of Hematology, Department of Medicine, Banphaeo General Hospital, Samutsakhon, Thailand
| | - Nisachon Khorwanichakij
- Division of Hematology, Department of Medicine, Chaophra Yommarat Hospital, Suphanburi, Thailand
| | - Putchong Saetow
- Division of Hematology, Department of Medicine, Faculty of Medicine, Lerdsin Hospital, Bangkok, Thailand
| | - Supawee Saengboon
- Division of Hematology, Department of Medicine, Faculty of Medicine, Thammasat University Hospital, Pathumthani, Thailand
| | | | - Wikanda Pholmoo
- Division of Hematology, Department of Medicine, Pathumthani Hospital, Pathumthani, Thailand
| | - Boonyanuch Dujjawan
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Noppadol Siritanaratkul
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Limwongse C, Rojnuckarin P, Kupatawintu P, Thongthaisin A, Permpikul P, Kitpoka P, Watanaboonyongcharoen P, Sucharitchan P, Torcharus K, Fucharoen S, Kongpakwattana K, Nerapusee O, Chuncharunee S. How do we translate gaps and unmet needs of blood management for thalassemia into a collaborative implementation framework? Transfus Med 2023; 33:497-502. [PMID: 37775960 DOI: 10.1111/tme.13011] [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] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/15/2023] [Accepted: 09/09/2023] [Indexed: 10/01/2023]
Abstract
BACKGROUND AND OBJECTIVE The mainstay of management for thalassemia is regular blood transfusions. However, gaps and unmet needs of blood services for thalassemia are still not clearly identified and addressed in Thailand, a country prevalent with thalassemia. What can be a collaborative implementation framework that helps advance practices and policies relating to blood management for thalassemia? METHODS The first Blood & Beyond Roundtable Discussion was held in July 2022 to gather the current situation, gaps, and unmet needs of blood services for thalassemia from multidisciplinary experts and thalassemic patients. The Implementation Guide as suggested by the Centre for Effective Services was applied as a tool to consolidate information from the discussions and construct the collaborative implementation framework. RESULTS The National Blood Center and hospitals in Thailand followed the missions specified in the National Blood Policy and the standard guidelines to ensure the best practice of blood management for thalassemia. However, there were six gaps and unmet needs identified from the discussions. After all discussion points were mapped onto the framework, an implementation plan comprised of five specific activities became clear and actionable. CONCLUSION Without the complete information from both experts and patients, the implementation plan would not have been successfully constructed. The method that we employed to translate all information into the framework can be adapted by other countries to develop their own specific framework efficiently.
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Affiliation(s)
| | | | | | | | - Parichart Permpikul
- Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pimpan Kitpoka
- Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | | | | | - Kitti Torcharus
- Department of Pediatrics, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Suthat Fucharoen
- Thalassemia Research Center, Mahidol University, Bangkok, Thailand
| | | | - Osot Nerapusee
- Faculty of Pharmaceutical Science, Chulalongkorn University, Bangkok, Thailand
| | - Suporn Chuncharunee
- Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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Niltwat S, Limwongse C, Charatcharoenwitthaya N, Bunditvorapoom D, Bandidniyamanon W, Charatcharoenwitthaya P. Familial clustering of nonalcoholic fatty liver disease in first-degree relatives of adults with lean nonalcoholic fatty liver disease. Liver Int 2023; 43:2713-2726. [PMID: 37804066 DOI: 10.1111/liv.15758] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/08/2023]
Abstract
BACKGROUND AND AIMS The heritability of nonalcoholic fatty liver disease (NAFLD) in lean individuals is undetermined. This familial aggregation study aimed to evaluate familial linkage for NAFLD and the risk of NAFLD among first-degree relatives of probands with lean NAFLD. METHODS This study prospectively recruited cohorts of probands with lean NAFLD, probands with obese NAFLD, and lean probands with non-NAFLD and their respective first-degree relatives. A total of 257 participants were evaluated for liver steatosis, defined by the controlled attenuation parameter ≥288 dB/m2 , metabolic characteristics, and the PNPLA3, TM6SF2, and MBOAT7 polymorphisms. RESULTS The prevalence of NAFLD in first-degree relatives of lean NAFLD probands (39.9%) was similar to that in the obese NAFLD group (36.9%) and was significantly higher than in lean persons without NAFLD (19.1%). First-degree relatives of probands with NAFLD who were male, and had central obesity, hypertriglyceridaemia, insulin resistance, and the PNPLA3 rs738409C>G allele had a significantly higher prevalence of NAFLD. After multivariable adjustment for gender, metabolic characteristics, and the PNPLA3 rs738409C>G allele, first-degree relatives of probands with lean NAFLD (odds ratio [OR], 5.13; 95% CI, 1.77-14.86) and obese NAFLD (OR, 3.20; 95% CI, 1.14-8.99) exhibited an increased risk of NAFLD compared with those of lean controls without NAFLD. CONCLUSIONS Our well-phenotype cohorts revealed familial clustering of NAFLD and higher risks of NAFLD in first-degree relatives of probands with lean or obese NAFLD. The findings encourage clinicians caring for NAFLD patients to be more vigilant for NAFLD in their family members.
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Affiliation(s)
- Sorachat Niltwat
- Division of Gastroenterology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Division of Gastroenterology, Department of Medicine, Panyananthaphikkhu Chonprathan Medical Center, Srinakharinwirot University, Nonthaburi, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Duangkamon Bunditvorapoom
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wimolrak Bandidniyamanon
- Division of Gastroenterology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Phunchai Charatcharoenwitthaya
- Division of Gastroenterology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Jinda W, Moungthard H, Limwongse C, Pithukpakorn M, Saelee P, Pokkasup N, Khunpukdee S, Sukthaworn S, Jumpasri J. Identification of Genomic Alterations in Thai Patients With Colorectal Cancer Using Next-Generation Sequencing-Based Multigene Cancer Panel. Cureus 2023; 15:e39067. [PMID: 37323311 PMCID: PMC10267666 DOI: 10.7759/cureus.39067] [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] [Accepted: 05/15/2023] [Indexed: 06/17/2023] Open
Abstract
Introduction Colorectal cancer (CRC) is one of the leading causes of death and illness in the general population. Although the incidence of CRC is steadily decreasing worldwide, it is being diagnosed more in individuals under 50 years of age. Multiple disease-causing variants have been reported to be involved in the development of CRC. This study aimed to investigate the molecular and clinical characteristics of Thai patients with CRC. Methods NGS-based multigene cancer panel testing was performed on 21 unrelated patients. Target enrichment was performed using a custom-designed Ion AmpliSeq on-demand panel. Thirty-six genes associated with CRC and other cancer were analyzed for variant detection. Results Sixteen variants (five nonsense, eight missense, two deletions, and one duplication) in nine genes were identified in 12 patients. Eight (66.7%) patients harboring disease-causing deleterious variants in genes APC, ATM, BRCA2, MSH2, and MUTYH. One of the eight patients also carried additional heterozygous variants in genes ATM, BMPR1A, and MUTYH. In addition, four patients carried variants of uncertain significance in genes APC, MLH1, MSH2, STK11, and TP53. Among all detected genes, APC was the most frequent causative gene observed in CRC patients, which is consistent with previous reports. Conclusion This study demonstrated the comprehensive molecular and clinical characterization of CRC patients. These findings showed the benefits of using multigene cancer panel sequencing for pathogenic gene detection and showed the prevalence of genetic aberrations in Thai patients with CRC.
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Affiliation(s)
- Worapoj Jinda
- Division of Research and Technology Assessment, National Cancer Institute, Bangkok, THA
| | - Hathaiwan Moungthard
- Division of Gastrointestinal and Liver Clinic, National Cancer Institute, Bangkok, THA
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, THA
| | - Manop Pithukpakorn
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, THA
| | - Pensri Saelee
- Division of Research and Technology Assessment, National Cancer Institute, Bangkok, THA
| | - Nareerat Pokkasup
- Division of Gastrointestinal and Liver Clinic, National Cancer Institute, Bangkok, THA
| | - Saipan Khunpukdee
- Division of Gastrointestinal and Liver Clinic, National Cancer Institute, Bangkok, THA
| | | | - Jaruphan Jumpasri
- Division of Policy and Medical Strategy Development, National Cancer Institute, Bangkok, THA
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Chiraphapphaiboon W, Thongnoppakhun W, Limjindaporn T, Sawasdichai S, Roothumnong E, Prangphan K, Pamornpol B, Limwongse C, Pithukpakorn M. STK11 Causative Variants and Copy Number Variations Identified in Thai Patients With Peutz-Jeghers Syndrome. Cureus 2023; 15:e34495. [PMID: 36874343 PMCID: PMC9983355 DOI: 10.7759/cureus.34495] [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] [Accepted: 01/31/2023] [Indexed: 02/04/2023] Open
Abstract
Introduction Peutz-Jeghers syndrome (PJS) is a rare autosomal dominant inherited disorder caused by germline mutations in the serine-threonine kinase 11 (STK11) tumor suppressor gene. This syndrome is characterized by hamartomatous gastrointestinal polyps, mucocutaneous melanin pigmentation, and a higher risk of developing various cancers. Methods We summarized the clinical and molecular characteristics of five unrelated Thai patients with PJS. Denaturing high-performance liquid chromatography (DHPLC) screening, coupled with direct DNA sequencing and multiplex ligation-dependent probe amplification (MLPA), were applied for the molecular analysis of STK11. Results A total of four STK11 pathogenic changeswere identified in the five PJS patients, including two frameshift variants (a novel c.199dup, p.Leu67ProfsTer96 and a known c.834_835del, p.Cys278TrpfsTer6) and two types of copy number variations (CNV), exon 1 deletion and exons 2-3 deletion. Among reported STK11 exonic deletions, exon 1 and exons 2-3 deletions were found to be the two most commonly deleted exons. Conclusion All identified STK11 mutations were null mutations that were associated with more severe PJS phenotypes and cancers. This study broadens the phenotypic and mutational spectrum of STK11 in PJS.
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Affiliation(s)
| | - Wanna Thongnoppakhun
- Siriraj Genomics, Office of the Dean, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA
| | | | - Sunisa Sawasdichai
- Siriraj Genomics, Office of the Dean, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA
| | - Ekkapong Roothumnong
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA
| | - Kanjana Prangphan
- Siriraj Genomics, Office of the Dean, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA
| | - Benjaporn Pamornpol
- Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA
| | - Chanin Limwongse
- Siriraj Genomics, Office of the Dean, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA.,Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA
| | - Manop Pithukpakorn
- Siriraj Genomics, Office of the Dean, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA.,Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, THA
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Kim D, Shim KH, Bagyinszky E, Van Vo G, Kang MJ, Senanarong V, Limwongse C, Shin S, Jeong S, Kim J, Park YH, Youn YC, Kim S, An SS. Characteristics of β‐secretase activity on APP‐V604M and APP‐V669L. Alzheimers Dement 2022. [DOI: 10.1002/alz.064382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Danyeong Kim
- Department of Bionano Technology, Gachon University Seongnam Korea, Republic of (South)
| | - Kyu Hwan Shim
- Department of Bionano Technology, Gachon University Seongnam Korea, Republic of (South)
| | - Eva Bagyinszky
- Graduate School of Environment Department of Industrial and Environmental Engineering, Gachon University Seongnam Korea, Republic of (South)
| | - Giau Van Vo
- School of Medicine, Vietnam National University Ho Chi Minh City Viet Nam
| | - Min Ju Kang
- Veterans Health Service Medical Center Seoul Korea, Republic of (South)
| | - Vorapun Senanarong
- Faculty of Medicine Siriraj Hospital, Mahidol University Bangkok Thailand
| | - Chanin Limwongse
- Faculty of Medicine, Siriraj Hospital, Mahidol University Bangkok Thailand
| | - Seunghwan Shin
- Department of Bionano Technology, Gachon University Seongnam Korea, Republic of (South)
| | - SoonPyo Jeong
- Department of Bionano Technology, Gachon University Seongnam Korea, Republic of (South)
| | - Jongsung Kim
- Department of Chemical and Biological Engineering, Gachon University Seongnam Korea, Republic of (South)
| | - Young Ho Park
- Seoul National University Bundang Hospital Seongnam Korea, Republic of (South)
| | - Young Chul Youn
- Chung‐Ang University Hospital Seoul Korea, Republic of (South)
| | - SangYun Kim
- Seoul National University Bundang Hospital Seongnam Korea, Republic of (South)
| | - Seong Soo An
- Department of Bionano Technology, Gachon University Seongnam Korea, Republic of (South)
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9
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Yaowaluk T, Senanarong V, Limwongse C, Boonprasert R, Bunditvorapoom D, Kaewsutthi S, Kijsanayotin P. Association study identifies genetic determinants and non-genetic factors on steady-state plasma and therapeutic outcome of galantamine in mixed dementia. Eur J Clin Pharmacol 2022; 78:1249-1259. [PMID: 35633386 DOI: 10.1007/s00228-022-03322-1] [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: 06/11/2021] [Accepted: 04/15/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE This study aimed to evaluate the influence of genetic polymorphisms of drug-metabolizing enzyme genes, transporter gene, pathological gene (APOE), and non-genetic factors on therapeutic outcomes as well as steady-state plasma concentrations (Cpss) of galantamine in Thai patients with mixed dementia. METHODS Fifty-one Thai patients with mixed dementia who received galantamine for at least 6 months were recruited. CYP2D6, CYP3A5, and ABCB1 polymorphisms were detected by TaqMan® Genotyping Assay. UGT1A1 and APOE polymorphism was detected by direct Sanger sequencing technique and restriction fragment length polymorphism technique. Cpss of galantamine was measured by ultra-performance liquid chromatography. Associations of genetic and non-genetic factors with Cpss and clinical outcomes (change in cognitive function as measured by the Thai Mental State Examination (ΔTMSE) scores) were determined by using univariate and multivariate analysis. RESULTS The multivariate regression model revealed that patients who carried one or more detrimental allelic variant (CYP2D6, CYP3A5, and UGT1A1) showed a tendency toward a higher galantamine adjusted Cpss (B = 34.559, 95% CI = 0.741-68.377, p value = 0.045). Logistic regression analysis also revealed CYP2D6*10 carriers were significantly associated with higher ΔTMSE (B = 5.227, 95% CI = 2.395-8.060, p value = 0.001). UGT1A1 mutant alleles and non-genetic factors including concomitant use of statin drugs and higher education level can attenuate therapeutic outcomes of galantamine. CONCLUSION Pharmacokinetic-related genes including CYP2D6*10 and UGT1A1 mutant alleles were significantly associated with galantamine adjusted Cpss and cognitive function. Determination of Cpss and genotype could be an adjunct examination to provide further explanation in interindividual variability of galantamine therapeutic outcome.
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Affiliation(s)
- Thitipon Yaowaluk
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Phayathai Rd, Pathumwan, Bangkok, 10330, Thailand
| | - Vorapun Senanarong
- Division of Neurology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Rasda Boonprasert
- Clinical Toxicology Laboratory, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Duangkamon Bunditvorapoom
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Supannee Kaewsutthi
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pornpimol Kijsanayotin
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Phayathai Rd, Pathumwan, Bangkok, 10330, Thailand.
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10
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Anurat K, Khongkhatithum C, Tim-Aroon T, Limwongse C, Thampratankul L. Sleep Disorder: An Overlooked Manifestation of Glucose Transporter Type-1 Deficiency Syndrome. Neuropediatrics 2022; 53:129-132. [PMID: 34674205 DOI: 10.1055/s-0041-1736179] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Glucose transporter type-1 deficiency syndrome (Glut1 DS) is a rare disorder with various manifestations. Early diagnosis is crucial because treatment with the ketogenic diet can lead to clinical improvement. Here, we report the cases of two siblings with Glut1 DS and one of them presented with sleep disorder which is a rare and atypical manifestation of Glut1 DS. Patient 1 was a 3.5-year-old boy who presented with paroxysmal loss of tone and weakness of the whole body with unresponsiveness after waking up. He also had excessive daytime sleepiness, insomnia, and restless sleep. His other clinical findings included focal seizures, paroxysmal exercise-induced dyskinesia (PED), ataxia, mild global developmental delay, and hyperactivity. Patient 2 was a 5.5-year-old boy who presented with drug-resistant focal epilepsy, global developmental delay, paroxysmal dystonia, and ataxia. A novel heterozygous nonsense variant of SLC2A1, c.1177G > T (p.Glu393*), classified as a pathogenic variant, was identified in both patients, but not in their parents' blood. After treatment with the modified Atkins diet, their neurological functions significantly improved. In conclusion, we reported two siblings with variable phenotypes of Glut1 DS with a novel nonsense mutation. Although sleep disorder and daytime somnolence were the nonclassical manifestations of Glut1 DS, the diagnostic evaluation of possible Glut1 DS in patients presented with daytime sleepiness, particularly in cases with the cooccurrence of seizures or movement disorders should be considered.
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Affiliation(s)
- Kingthong Anurat
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Chaiyos Khongkhatithum
- Division of Neurology, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Thipwimol Tim-Aroon
- Division of Neurology, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Lunliya Thampratankul
- Division of Neurology, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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11
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Suwanawiboon B, Rotchanapanya W, Mahaprom K, Thongnoppakhun W, Lalerd Y, Limwongse C, Sermsathanasawadi N, Owattanapanich W. The efficacy of low-dose warfarin initiation (3 mg versus 5 mg) in newly diagnosed venous thromboembolism patients among a population with a high prevalence of warfarin-sensitive haplotype of the VKORC1 gene: a randomized controlled trial. Hematology 2022; 27:95-104. [DOI: 10.1080/16078454.2021.2019891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Bundarika Suwanawiboon
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wannaphorn Rotchanapanya
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Komkrit Mahaprom
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wanna Thongnoppakhun
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Yupaporn Lalerd
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nuttawut Sermsathanasawadi
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Weerapat Owattanapanich
- Division of Hematology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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12
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Dharmasaroja PA, Assanasen J, Pongpakdee S, Jaisin K, Lolekha P, Phanasathit M, Cheewakriengkrai L, Chotipanich C, Witoonpanich P, Pitiyarn S, Lertwilaiwittaya P, Dejthevaporn C, Limwongse C, Phanthumchinda K. Etiology of Dementia in Thai Patients. Dement Geriatr Cogn Dis Extra 2021; 11:64-70. [PMID: 34054910 PMCID: PMC8138237 DOI: 10.1159/000515676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022] Open
Abstract
Introduction Molecular imaging has been developed and validated in Thai patients, comprising a portion of patients in the dementia registry. This should provide a more accurate diagnosis of the etiology of dementia, which was the focus of this study. Methods This was a multicenter dementia study. The baseline characteristics, main presenting symptoms, and results of investigations and cognitive tests of the patients were electronically collected in the registry. Functional imaging and/or molecular imaging were performed in patients with an equivocal diagnosis of the causes of dementia, especially in atypical dementia or young onset dementia (YOD). Results There were 454 patients in the study. The mean age of the patients was 78 years, with 60% female. Functional imaging and/or molecular imaging were performed in 57 patients (57/454 patients, 13%). The most common cause of dementia was Alzheimer's disease (AD; 50%), followed by vascular dementia (VAD; 24%), dementia with Lewy bodies (6%), Parkinson's disease dementia (6%), frontotemporal dementia (FTD; 2.6%), progressive supranuclear palsy (2%), multiple system atrophy (0.8%), and corticobasal syndrome (0.4%). YOD accounted for 17% (77/454 patients), with a mean age of 58 years. The causes of YOD were early onset amnestic AD (44%), VAD (16%), behavioral variant FTD (8%), posterior cortical atrophy (6.5%), and logopenic variant primary progressive aphasia (5.2%). Conclusion AD was the most common cause of dementia in Thai patients and the distribution of other types of dementia and main presenting symptoms were similar to previous reports in Western patients; however, the proportion of YOD was higher.
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Affiliation(s)
- Pornpatr A Dharmasaroja
- Department of Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand.,Faculty of Medicine, Chulabhorn International College of Medicine, Thammasat University, Pathumthani, Thailand
| | - Jintana Assanasen
- Division of Geriatric Medicine, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Sunsanee Pongpakdee
- Department of Medicine, Bhumibol Adulyadej Hospital, Royal Thai Airforce, Bangkok, Thailand
| | - Kankamol Jaisin
- Department of Psychiatry, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Praween Lolekha
- Department of Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Muthita Phanasathit
- Department of Psychiatry, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | | | - Chanisa Chotipanich
- National Cyclotron and PET Centre, Chulabhorn Hospital, Chulabhorn Royal Academy, Bangkok, Thailand
| | - Pirada Witoonpanich
- Division of Neurology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sutisa Pitiyarn
- Medicine and Psychiatry Nursing Division, Department of Nursing, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pongtawat Lertwilaiwittaya
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Charungthai Dejthevaporn
- Division of Neurology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
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13
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Lertwilaiwittaya P, Suktitipat B, Khongthon P, Pongsapich W, Limwongse C, Pithukpakorn M. Identification of novel mutation in RANKL by whole-exome sequencing in a Thai family with osteopetrosis; a case report and review of RANKL osteopetrosis. Mol Genet Genomic Med 2021; 9:e1727. [PMID: 34056870 PMCID: PMC8372087 DOI: 10.1002/mgg3.1727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 05/03/2021] [Accepted: 05/11/2021] [Indexed: 01/08/2023] Open
Abstract
Background Osteopetrosis is a rare form of skeletal dysplasia characterized by increased bone density that leads to bone marrow failure, compressive neuropathy, and skeletal dysmorphism. Molecular diagnosis is essential as it guides treatment and prognosis. We report Thai siblings with an ultra‐rare form of osteopetrosis. Methods The older brother and the younger sister presented with chronic mandibular osteomyelitis in their 20s. Since childhood, they had visual impairment, pathological fracture, and skeletal dysmorphism. Quadruplet whole‐exome sequencing was performed and confirmed with Sanger sequencing. Novel mutation in TNFSF11 (RANKL) c.842T>G, p.Phe281Cys was identified in a homozygous state in both siblings. Results Surgical debridement, antibiotic, and hyperbaric oxygen therapy were used and discontinued over a 6‐month period with normalization of C‐reactive protein. Hematopoietic stem cell transplantation candidacy was excluded by molecular diagnosis. Conclusion We report a novel mutation in an ultra‐rare form of osteopetrosis. Our siblings manifested with a milder phenotype in comparison with nine cases previously published.
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Affiliation(s)
| | - Bhoom Suktitipat
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Integrative Computational BioScience Center, Mahidol University, Bangkok, Thailand
| | - Phongphak Khongthon
- Research Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Warut Pongsapich
- Department of Otorhinolaryngology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Manop Pithukpakorn
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Siriraj Center of Research Excellence in Precision Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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14
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Jinda W, Tuekprakhon A, Thongnoppakhun W, Limwongse C, Trinavarat A, Atchaneeyasakul LO. Molecular and clinical characterization of Thai patients with achromatopsia: identification of three novel disease-associated variants in the CNGA3 and CNGB3 genes. Int Ophthalmol 2020; 41:121-134. [PMID: 32869108 DOI: 10.1007/s10792-020-01559-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/01/2020] [Accepted: 08/17/2020] [Indexed: 11/24/2022]
Abstract
PURPOSE Achromatopsia (ACHM) is an autosomal recessive cone disorder characterized by pendular nystagmus, photophobia, reduced visual acuity, and partial or total absence of color vision. Mutations in six genes (CNGA3, CNGB3, GNAT2, PDE6C, PDE6H, and ATF6) have been reported in ACHM. There is no information on these disease-associated genes in Thai population. This study aimed to investigate the molecular and clinical characteristics in Thai patients with ACHM. METHODS Seven unrelated Thai patients with ACHM were recruited. Detailed ophthalmologic examination was performed. Polymerase chain reaction (PCR)-coupled single-strand conformation polymorphism (SSCP) screening followed by Sanger sequencing was used to identify sequence variants in all exons and splice junctions of three genes (CNGA3, CNGB3, and GNAT2). The pathogenicity of the detected variants was interpreted. Segregation analysis was performed to determine variant sharing in available family members. RESULTS Four patients displayed different SSCP migration patterns. Sequence analysis revealed a reported pathogenic and a novel disease-associated variant in the CNGA3 gene. For the CNGB3 gene, we found two novel disease-associated variants and a reported variant of uncertain significance (VUS). Segregation analysis confirmed that the variants identified in each patient were present in the heterozygous state in their corresponding family members, which was consistent with an autosomal recessive mode of inheritance. CONCLUSIONS This study demonstrated the first molecular and clinical characterization of ACHM in Thai patients. The identification of disease-associated genes in a specific population leads to a personalized gene therapy benefiting those affected patients.
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Affiliation(s)
- Worapoj Jinda
- Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Aekkachai Tuekprakhon
- Clinical Molecular Pathology Laboratory, Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wanna Thongnoppakhun
- Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Adisak Trinavarat
- Department of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand
| | - La-Ongsri Atchaneeyasakul
- Department of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, 10700, Thailand.
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15
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Senanarong V, An SSA, Giau VV, Limwongse C, Bagyinszky E, Kim S. Pathogenic PSEN1 Glu184Gly Mutation in a Family from Thailand with Probable Autosomal Dominant Early Onset Alzheimer's Disease. Diagnostics (Basel) 2020; 10:diagnostics10030135. [PMID: 32121568 PMCID: PMC7151116 DOI: 10.3390/diagnostics10030135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/20/2020] [Accepted: 02/25/2020] [Indexed: 02/01/2023] Open
Abstract
A pathogenic mutation in PSEN1 p.Glu184Gly was discovered in a Thai family with early onset Alzheimer's disease (EOAD) as the first case in Asia. Proband patient presented memory impairment and anxiety at the age of 41 years. Family history was positive, since several family members were also diagnosed with dementia (father and grandfather). MRI in the patient revealed global cortical atrophy without specific lesions or lacuna infarctions. Extensive genetic profiling for 50 neurodegenerative disease related genes was performed by next generation sequencing (NGS) on the patient. PSEN1 Glu184Gly was previously reported in French families with frontal variant Alzheimer's disease (AD). Interestingly, this mutation is located near the splicing site and could possibly result in abnormal cleavage of PSEN1 transcript. Furthermore, 3D models from protein structural predictions revealed significant structural changes, since glycine may result in increased flexibility of TM-III helix. Inter/intra-helical interactions could also be altered. In the future, functional studies should be performed to verify the probable role PSEN1 Glu184Gly in amyloid beta processing and pathogenicity.
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Affiliation(s)
- Vorapun Senanarong
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University and Thailand, Bangkok 10700, Thailand; (V.S.); (C.L.)
| | - Seong Soo A. An
- Department of Bionano Technology, Gachon University, Seongnam 13120, Korea; )
| | - Vo Van Giau
- Graduate School of Environment Department of Industrial and Environmental Engineering, Gachon University, Seongnam 13120, Korea
| | - Chanin Limwongse
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University and Thailand, Bangkok 10700, Thailand; (V.S.); (C.L.)
| | - Eva Bagyinszky
- Graduate School of Environment Department of Industrial and Environmental Engineering, Gachon University, Seongnam 13120, Korea
- Correspondence: (E.B.); (S.K.); Tel.: +82-31-750-8591 (E.B.); +82-31-787-7462 (S.K.); Fax: +82-31-719-6815 (S.K.)
| | - SangYun Kim
- Department of Neurology, Seoul National University College of Medicine & Neurocognitive Behavior Center, Seoul National University Bundang Hospital, Seongnam 13620, Korea
- Correspondence: (E.B.); (S.K.); Tel.: +82-31-750-8591 (E.B.); +82-31-787-7462 (S.K.); Fax: +82-31-719-6815 (S.K.)
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16
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Thongngarm T, Jameekornrak A, Chaiyaratana N, Thongnoppakhun W, Sangasapaviliya A, Jirapongsananuruk O, Limwongse C. Effect of gene polymorphisms in ADAM33, TGFβ1, VEGFA, and PLAUR on asthma in Thai population. Asian Pac J Allergy Immunol 2019; 40:39-46. [PMID: 31586488 DOI: 10.12932/ap-010419-0532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Most of the asthma susceptibility genes have demonstrated moderate effect. Gene-gene interaction may play a role in asthma. OBJECTIVE To investigate the genetic and gene-gene interaction effects of single nucleotide polymorphisms (SNPs) in the ADAM33, TGFβ1, VEGFA, and PLAUR genes on asthma in Thai population. METHODS Two hundred and fifty control and 250 asthmatic Thai subjects were recruited. Asthma was diagnosed based on symptoms and spirometry assessments using criteria outlined by the American Thoracic Society. Degrees of asthma severity were determined according to guidelines provided by the Global Initiative for Asthma. Asthmatic subjects were subcategorized into the low-severity (n = 106) and high-severity (n = 144) groups. Eleven SNPs in four genes were genotyped, including ADAM33 SNPs (rs528557/S2, rs598418, rs44707/ST+4), TGFβ1 SNPs (rs2241715, rs11466345), VEGFA SNPs (rs833069, rs3025010), and PLAUR SNPs (rs344781, rs344787, rs2239374, rs2239372). Association analyses between SNPs and asthma, and tests for gene-gene interaction were performed. RESULTS The ADAM33 rs528557/S2 SNP was found to be associated with asthma according to the additive and dominant models. Comparison between the low-severity group and controls showed the VEGFA rs833069 SNP to be significantly associated with the low-severity group. No gene-gene interactions were observed in this study. CONCLUSIONS The ADAM33 rs528557/S2 and the VEGFA rs833069 SNPs were associated with Thai asthmatics, as well as with other populations worldwide. Further studies are warranted to investigate the use these SNPs as biomarkers for establishing early diagnosis or for predicting future risk of asthma.
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Affiliation(s)
- Torpong Thongngarm
- Division of Allergy and Clinical Immunology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Aree Jameekornrak
- Division of Allergy and Clinical Immunology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nachol Chaiyaratana
- Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok, Thailand.,Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wanna Thongnoppakhun
- Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Atik Sangasapaviliya
- Allergy and Immunology Unit, Department of Medicine, Phramongkutklao Hospital, Bangkok, Thailand
| | - Orathai Jirapongsananuruk
- Division of Allergy and Clinical Immunology, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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17
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Yaowaluk T, Senanarong V, Limwongse C, Boonprasert R, Kijsanayotin P. Influence of CYP2D6, CYP3A5, ABCB1, APOE polymorphisms and nongenetic factors on donepezil treatment in patients with Alzheimer's disease and vascular dementia. Pharmgenomics Pers Med 2019; 12:209-224. [PMID: 31564952 PMCID: PMC6732559 DOI: 10.2147/pgpm.s211259] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 07/16/2019] [Indexed: 01/15/2023]
Abstract
Purpose This study aims to evaluate the influence of genetic polymorphisms of CYP2D6, CYP3A5, ABCB1, and APOE genes and nongenetic factors on steady-state plasma concentrations (Cpss) of donepezil and therapeutic outcomes in Thai patients with Alzheimer’s disease (AD) and vascular dementia (VAD). Patients and methods Eighty-five dementia patients who received donepezil for at least six months were recruited. CYP2D6, CYP3A5, ABCB1, and APOE polymorphisms were genotyped. Cpss of donepezil was measured. Association of genetic and non-genetic factors with Cpss and clinical outcomes of donepezil (cognitive function as measured by the Thai Mental State Examination score; TMSE) were determined by using univariate and multivariate analysis. Results Both univariate and multiple linear regression analysis indicated that only CYP2D6*10 allele was associated with higher Cpss (p-value =0.029 and B =0.478, p-value =0.032, respectively) that might influence the clinical outcomes of donepezil. ie, TMSE (p-value =0.010 and B =4.527, p-value =0.001) and ΔTMSE (p-value =0.023 and B =4.107, p-value =0.002), especially in patients with AD. Interestingly, concomitant use of memantine was found to be associated with increased Cpss of donepezil (p-value =0.007 and B =0.511, p-value =0.014). Whereas, co-medication with antidepressant drugs attenuated clinical responses in patients with AD (TMSE: B =−2.719, p-value =0.013 and ΔTMSE: B =−2.348, p-value =0.028). Age was a significant predictor of donepezil response in VAD patients. No significant association of CYP3A5*3, ABCB1 3435C>T or ABCB1 1236C>T, and APOE ε4 genotypes with Cpss or clinical outcomes of donepezil was found in this study. Conclusion Our results suggests that CYP2D6*10 strongly influences Cpss and there is a trend toward better outcomes of donepezil in patients with AD. Nongenetic factors including concomitant drugs treatment might alter Cpss of donepezil or clinical outcomes.
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Affiliation(s)
- Thitipon Yaowaluk
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Vorapun Senanarong
- Division of Neurology, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Rasda Boonprasert
- Clinical Toxicology Laboratory, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pornpimol Kijsanayotin
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
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18
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Thongsing A, Pho-Iam T, Limwongse C, Likasitwattanakul S, Sanmaneechai O. Case series: Childhood Charcot-Marie-Tooth: Predominance of axonal subtype. eNeurologicalSci 2019; 16:100200. [PMID: 31417964 PMCID: PMC6690715 DOI: 10.1016/j.ensci.2019.100200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 06/20/2019] [Accepted: 07/21/2019] [Indexed: 11/11/2022] Open
Abstract
Case series reports on clinical features of pediatric hereditary neuropathy in Thailand is scarce. Subtype and clinical presentation in childhood-onset CMT differ from adult-onset. The aim of this study is to investigate the CMT phenotype in Thai children. We retrospectively reviewed children diagnosed with CMT who followed up with Pediatric Neurology, Siriraj Hospital from January 1999 to June 2016. CMT subtypes determined by clinical presentation and neurophysiologic studies. Mutation analysis of PMP22 genes was performed in all demyelinating cases. The disease burden was assessed by CMT Neuropathy Score version 2 (CMTNSv2), CMT Examination Score (CMTES) and CMT Pediatric Scale (CMTPedS). 30 patients from 29 families with Hereditary Neuropathies, 25 diagnosed with CMT and 5 with HSAN. 8-year-old was the average age at first medical visit with disease-related problems. Twenty (67%) were male. Twenty-three were sporadic (77%). 16.7% was autosomal dominant and 6.7% was autosomal recessive. Clinical presentations in CMT children were walking difficulty and foot deformities. Nine (36%) CMT patients had demyelinating and sixteen (64%) had axonal. Forty percent had a history of delayed walking after 15-month-old. Foot deformities presented in all CMT patients, and twelve had foot surgery. 2 axonal CMT patients were wheelchair-dependence. Mean (SD) CMTNSv2, CMTES and CMTPedS were 15.44(9), 11.05(7) and 34(4) respectively. Our findings suggest Thai CMT children are predominantly axonal type. Patients with low socioeconomic status and mild symptoms may not seek healthcare. International collaboration in genetic testing is crucial in diagnosis and initiation of clinical trials in future. Thai CMT children are predominantly axonal type. There is much higher incidence of HSAN among CMT children at our institution. International collaboration in genetic testing is crucial in diagnosis and initiation of clinical trials in future.
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Affiliation(s)
- Apirada Thongsing
- Division of Neurology, Department of Pediatrics, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Theeraphong Pho-Iam
- Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Medical Genetics Research and Laboratory, Research Department, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Surachai Likasitwattanakul
- Division of Neurology, Department of Pediatrics, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Oranee Sanmaneechai
- Division of Neurology, Department of Pediatrics, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Niyomnaitham S, Parinyanitikul N, Roothumnong E, Jinda W, Samarnthai N, Atikankul T, Suktitipat B, Thongnoppakhun W, Limwongse C, Pithukpakorn M. Tumor mutational profile of triple negative breast cancer patients in Thailand revealed distinctive genetic alteration in chromatin remodeling gene. PeerJ 2019; 7:e6501. [PMID: 30828495 PMCID: PMC6394341 DOI: 10.7717/peerj.6501] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 01/22/2019] [Indexed: 12/28/2022] Open
Abstract
Background Triple negative breast cancer (TNBC) is a breast cancer subtype characterized by absence of both hormonal receptors and human epithelial growth factor receptor 2 (HER2). TNBC accounts for 15–20% of breast cancer. TNBC is associated with more aggressive disease and worse clinical outcome. Though the underlying mechanism of TNBC is currently unclear, the heterogeneity of clinical characteristics in various population may relate to the difference in tumor mutational profile. There were studies on TNBC gene mutations in various ethnic groups but the tumor genome data on Thai TNBC patients is currently unknown. This study aims to investigate mutational profile of Thai TNBC. Methods The patients were Thai individuals who were diagnosed with primary breast carcinoma between 2014 and 2017. All surgically removed primary tumor tissues were carefully examined by pathologists and archived as formalin-fixed paraffin-embedded tumor. TNBC was defined by absence of hormonal receptors and HER2 by immunohistochemistry. Genomic DNA was extracted, enriched and sequenced of all exomes on the Illumina HiSeq. Genomic data were then processed through bioinformatics platform to identify genomic alterations and tumor mutational burden. Results A total of 116 TNBC patients were recruited. Genomic analysis of TNBC samples identified 81,460 variants, of which 5,906 variants were in cancer-associated genes. The result showed that Thai TNBC has higher tumor mutation burden than previously reported data. The most frequently mutated cancer-associated gene was TP53 similar to other TNBC cohorts. Meanwhile KMT2C was found to be more commonly mutated in Thai TNBC than previous studies. Mutational profile of Thai TNBC patients also revealed difference in many frequently mutated genes when compared to other Western TNBC cohorts. Conclusion This result supported that TNBC breast cancer patients from various ethnic background showed diverse genome alteration pattern. Although TP53 is the most commonly mutated gene across all cohorts, Thai TNBC showed different gene mutation frequencies, especially in KMT2C. In particular, the cancer gene mutations are more prevalent in Thai TNBC patients. This result provides important insight on diverse underlying genetic and epigenetic mechanisms of TNBC that could translate to a new treatment strategy for patients with this disease.
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Affiliation(s)
- Suvimol Niyomnaitham
- Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Napa Parinyanitikul
- Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Ekkapong Roothumnong
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Siriraj Center of Research Excellence in Precision Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Worapoj Jinda
- Siriraj Center of Research Excellence in Precision Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Research Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Norasate Samarnthai
- Department of Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Taywin Atikankul
- Department of Pathology, Queen Savang Vadhana Memorial Hospital, Thai Red Cross Society, Chonburi, Thailand
| | - Bhoom Suktitipat
- Siriraj Center of Research Excellence in Precision Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Integrative Computational Bioscience Center, Mahidol University, Bangkok, Thailand
| | - Wanna Thongnoppakhun
- Siriraj Center of Research Excellence in Precision Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Research Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Siriraj Center of Research Excellence in Precision Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Research Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Manop Pithukpakorn
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Siriraj Center of Research Excellence in Precision Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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20
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Santiwatana S, Mahachoklertwattana P, Limwongse C, Khlairit P, Pongratanakul S, Roothumnong E, Prangphan K, Choubtum L, Songdej D, Poomthavorn P. Skewed X chromosome inactivation in girls and female adolescents with autoimmune thyroid disease. Clin Endocrinol (Oxf) 2018; 89:863-869. [PMID: 30229980 DOI: 10.1111/cen.13857] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 08/10/2018] [Revised: 09/11/2018] [Accepted: 09/14/2018] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Skewed X chromosome inactivation (XCI) was associated with female predominance in adult autoimmune thyroid disease (ATD). In normal females, skewed XCI is increased with age. Whether early-onset skewed XCI is associated with childhood ATD remains unknown. This study aimed to determine XCI skewing in paediatric ATD. DESIGN, PATIENTS AND MEASUREMENTS Ninety-one female ATD patients, aged 3-20 years and 57 age-matched, female controls were enrolled. XCI was analysed by enzymatic digestion of DNA with methylation-sensitive enzymes followed by PCR of the polymorphic CAG repeat in the androgen receptor gene. Skewed XCI was defined as having 80% or greater of the cells preferentially inactivated on the same X chromosome. XCI pattern of the enrolled patients and parental origin of the skewed XCI were determined. RESULTS After exclusion of samples with homozygous CAG repeats, skewed XCI was analysed in 83 patients (57 Graves' disease and 26 Hashimoto thyroiditis) and 52 controls. There was an increased frequency of skewed XCI in ATD patients as compared with the controls (23% vs 8%, P = 0.022). Patients with Hashimoto thyroiditis had greater frequency of skewed XCI than patients with Graves' disease (38% vs 16%, P = 0.023). There were no differences in clinical parameters between patients with skewed and random XCI. Analysis of 7 patients with skewed XCI showed a preferential inactivation of paternal X chromosome in 6 patients (86%). CONCLUSIONS Frequency of skewed XCI was increased in childhood ATD. This observation suggests a possible association of skewed XCI in the development of paediatric ATD.
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Affiliation(s)
- Suttikarn Santiwatana
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Pat Mahachoklertwattana
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Department of Internal Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Patcharin Khlairit
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sarunyu Pongratanakul
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Ekkapong Roothumnong
- Department of Internal Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kanjana Prangphan
- Division of Medical Genetics Research and Laboratory, Siriraj Medical Research Center, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Lulin Choubtum
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Duantida Songdej
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Preamrudee Poomthavorn
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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21
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Van Giau V, Senanarong V, Bagyinszky E, Limwongse C, An SSA, Kim S. Identification of a novel mutation in APP gene in a Thai subject with early-onset Alzheimer's disease. Neuropsychiatr Dis Treat 2018; 14:3015-3023. [PMID: 30510423 PMCID: PMC6231518 DOI: 10.2147/ndt.s180174] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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] [Indexed: 01/13/2023] Open
Abstract
INTRODUCTION Early-onset Alzheimer's disease (AD) accounts for than less 1% of all AD cases, with large variation in the reported genetic contributions of known dementia genes. Mutations in the amyloid precursor protein (APP) gene were the first to be recognized as the cause of AD. METHODS Here, a male patient with probable early-onset AD at the age of 55 years from Thailand was investigated by next-generation sequencing. RESULTS A novel mutation in exon 14 of APP (c.1810C>T, p.V604M) was found. He initially illustrated the clinical manifestations of progressive nonfluent aphasia in 2011. However, he was finally diagnosed with AD presenting logopenic aphasia in 2013. The follow-up magnetic resonance imaging scan showed progression of hippocampal trophy compared with the initial image. A 3D protein structure model revealed that V604M exchange could result in significant changes in the APP protein due to the increased hydrophobicity of methionine in the helix, which could result in altering of the APP functions. CONCLUSION Additional studies to characterize APP p.V604M are necessary to further understand the effects of this mutation.
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Affiliation(s)
- Vo Van Giau
- Department of Bionano Technology, Gachon Bionano Research Institute, Gachon University, Seongnam, South Korea,
| | - Vorapun Senanarong
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Eva Bagyinszky
- Department of Bionano Technology, Gachon Bionano Research Institute, Gachon University, Seongnam, South Korea,
| | - Chanin Limwongse
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Seong Soo A An
- Department of Bionano Technology, Gachon Bionano Research Institute, Gachon University, Seongnam, South Korea,
| | - SangYun Kim
- Department of Neurology, Seoul National University College of Medicine & Neurocognitive Behavior Center, Seoul National University Bundang Hospital, Seongnam, South Korea,
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22
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Chanayat R, Sawasdichai S, Limwongse C, Thongnoppakhun W. AB096. Molecular diagnosis of aniridia or WAGR syndrome using a simple DHPLC-based semi-quantitative multiplex PCR for detection of PAX6 large deletion. Ann Transl Med 2017. [DOI: 10.21037/atm.2017.s096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Vareesangthip K, Vareesangthip K, Limwongse C, Reesukumal K. Role of Urinary Neutrophil Gelatinase-Associated Lipocalin for Predicting the Severity of Renal Functions in Patients With Autosomal-Dominant Polycystic Kidney Disease. Transplant Proc 2017; 49:950-954. [PMID: 28583565 DOI: 10.1016/j.transproceed.2017.03.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND Autosomal-dominant polycystic kidney disease (ADPKD) has a feature of disruption of tubular integrity with increased cellular proliferation and apoptosis. There are several known tubular membrane proteins in the pathogenesis of ADPKD, and one of these proteins is the neutrophil gelatinase-associated lipocalin (NGAL). NGAL is a protein expressed on renal tubular cells of which production is markedly increased in response to harmful stimuli such as ischemia or toxicity. OBJECTIVE We aim to study whether urinary NGAL levels could be used as a marker to identify the severity of ADPKD in patients. METHODS Urinary NGAL levels were measured in 30 patients with ADPKD compared with 30 control patients who were matched by age, gender, and glomerular filtration rate (GFR). All patients with ADPKD were diagnosed by using both phenotypic and genotypic criteria, which showed that all cases of ADPKD were caused by PKD1 gene mutation. The urinary NGAL level was measured using The NGAL Test by Roche, with analytic range of 25-1000 ng/mL. RESULTS In the ADPKD group, there was significant negative correlation between urinary NGAL and GFR (Pearson r = -0.472; P = .008) and significant positive correlation between urinary NGAL and serum creatinine (Pearson r = 0.718; P < .01). Elevated urinary NGAL was increased as GFR of ADPKD patients was decreased. CONCLUSION Urinary NGAL might play role in the pathway of renal tubular damage in patients with ADPKD and might be useful in the prediction of the possibility to progress to chronic kidney disease in patients with ADPKD.
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Affiliation(s)
- K Vareesangthip
- Division of Nephrology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
| | - K Vareesangthip
- Division of Nephrology, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - C Limwongse
- Division of Medical Genetics, Department of Medicine Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - K Reesukumal
- Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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24
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Jinda W, Taylor TD, Suzuki Y, Thongnoppakhun W, Limwongse C, Lertrit P, Trinavarat A, Atchaneeyasakul LO. Whole Exome Sequencing in Eight Thai Patients With Leber Congenital Amaurosis Reveals Mutations in the CTNNA1 and CYP4V2 Genes. Invest Ophthalmol Vis Sci 2017; 58:2413-2420. [PMID: 28453600 DOI: 10.1167/iovs.16-21322] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Our goal was to describe the clinical and molecular genetic findings in Thai patients with Leber congenital amaurosis (LCA). Methods Whole exome sequencing (WES) was performed in eight unrelated patients. All genes responsible for inherited retinal diseases (IRDs) based on RetNet were selected for analysis. Potentially causative variants were filtered through a bioinformatics pipeline and validated using Sanger sequencing. Segregation analysis of the causative genes was performed in family members when available. Results Eleven deleterious variants, six nonsense and five missense, were identified in seven genes: four LCA-associated genes (CEP290, IQCB1, NMNAT1, and RPGRIP1), one gene responsible for syndromic LCA (ALMS1), and two IRDs-related genes (CTNNA1 and CYP4V2). Clinical reassessment supported the diagnosis of syndromic LCA in those patients harboring potentially pathogenic variants in the ALMS1. Interestingly, two causative genes, CTNNA1 and CYP4V2, previously reported to cause butterfly-shaped pigment dystrophy (BSPD) and Bietti's crystalline dystrophy (BCD), respectively, were detected in two other patients. These two patients developed rapid and severe visual loss in contrast to BSPD and BCD patients in previous studies. The results of this study demonstrate that causative variants identified in the CTNNA1 and CYP4V2 genes are also associated with LCA. Conclusions This is the first report describing the molecular genetics and clinical manifestations of Thai patients with LCA. The present study expands the spectrum of LCA-associated genes, which is a benefit for molecular diagnosis. The identification of mutations in the CTNNA1 and CYP4V2 genes requires further elucidation in larger cohorts with LCA.
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Affiliation(s)
- Worapoj Jinda
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Todd D Taylor
- Laboratory for Integrated Bioinformatics, Core for Precise Measuring and Modeling, RIKEN Center for Integrative Medical Sciences, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Yutaka Suzuki
- Department of Medical Genome Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Wanna Thongnoppakhun
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand 5Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Patcharee Lertrit
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Adisak Trinavarat
- Department of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - La-Ongsri Atchaneeyasakul
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand 6Department of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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25
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Jinda W, Poungvarin N, Taylor TD, Suzuki Y, Thongnoppakhun W, Limwongse C, Lertrit P, Suriyaphol P, Atchaneeyasakul LO. A novel start codon mutation of the MERTK gene in a patient with retinitis pigmentosa. Mol Vis 2016; 22:342-51. [PMID: 27122965 PMCID: PMC4842005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/19/2016] [Indexed: 11/03/2022] Open
Abstract
PURPOSE Retinitis pigmentosa (RP) is a clinically and genetically heterogeneous group of inherited retinal degenerations characterized by progressive loss of photoreceptor cells and RPE functions. More than 70 causative genes are known to be responsible for RP. This study aimed to identify the causative gene in a patient from a consanguineous family with childhood-onset severe retinal dystrophy. METHODS To identify the defective gene, whole exome sequencing was performed. Candidate causative variants were selected and validated using Sanger sequencing. Segregation analysis of the causative gene was performed in additional family members. To verify that the mutation has an effect on protein synthesis, an expression vector containing the first ten amino acids of the mutant protein fused with the DsRed2 fluorescent protein was constructed and transfected into HEK293T cells. Expression of the fusion protein in the transfected cells was measured using fluorescence microscopy. RESULTS By filtering against public variant databases, a novel homozygous missense mutation (c.3G>A) localized in the start codon of the MERTK gene was detected as a potentially pathogenic mutation for autosomal recessive RP. The c.3G>A mutation cosegregated with the disease phenotype in the family. No expression of the first ten amino acids of the MerTK mutant fused with the DsRed2 fluorescent protein was detected in HEK293T cells, indicating that the mutation affects the translation initiation site of the gene that may lead to loss of function of the MerTK signaling pathway. CONCLUSIONS We report a novel missense mutation (c.3G>A, p.0?) in the MERTK gene that causes severe vision impairment in a patient. Taken together with previous reports, our results expand the spectrum of MERTK mutations and extend our understanding of the role of the MerTK protein in the pathogenesis of retinitis pigmentosa.
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Affiliation(s)
- Worapoj Jinda
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Naravat Poungvarin
- Clinical Molecular Pathology Laboratory, Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Todd D. Taylor
- Laboratory for Integrated Bioinformatics, Core for Precise Measuring and Modeling, RIKEN Center for Integrative Medical Sciences, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Yutaka Suzuki
- Department of Medical Genome Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Wanna Thongnoppakhun
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand,Division of Medical Genetics, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Patcharee Lertrit
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Prapat Suriyaphol
- Bioinformatics and Data Management for Research Unit, Office for Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - La-ongsri Atchaneeyasakul
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand,Department of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Wannaiampikul S, Phonrat B, Tungtrongchitr A, Limwongse C, Chongviriyaphan N, Santiprabhob J, Tungtrongchitr R. Genetic variant screening of MC3R and MC4R genes in early-onset obese children and their relatives among a Thai population: family-based study. Genet Mol Res 2015; 14:18090-102. [PMID: 26782456 DOI: 10.4238/2015.december.22.35] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
MC3R (melanocortin-3 receptor) and MC4R (melanocortin-4 receptor) play important roles in energy homeostasis. Severe early-onset obesity, known as monogenic obesity when it is the consequence of a mutation in a single-gene product, may result when energy homeostasis is disrupted. The purpose of our study was to screen for variations of the MC3R and MC4R genes and observe the mode of inheritance of variations in affected families. We used polymerase chain reaction and direct sequencing to analyze the 11 early-onset obese children (probands) with their 71 family members, together with DNA from 100 healthy subjects used as controls. No novel mutations were found in the MC3R gene. Two previously described polymorphisms, rs3746619 and rs3827103, were detected in the MC3R gene. It was not associated with any obesity-related phenotypes. Three heterozygous variations of the MC4R gene were detected in 3 of 11 probands. The rs34114122 and rs61741819 variations have previously been reported, but rs182455344 was novel. Moreover, each MC4R variant was also found in a number of family members, indicating that this molecular analysis of a family-based study showed an autosomal dominant pattern. Our study indicated that MC4R variations in early-onset obese Thai children were found, and transmission of these variations in each family is in the dominant pattern. These variants could possibly contribute to a genetic influence of early-onset obesity in Thais. There is no evidence of any association between MC3R variations and obesity.
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Affiliation(s)
- S Wannaiampikul
- Department of Tropical Nutrition & Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - B Phonrat
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - A Tungtrongchitr
- Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - C Limwongse
- Division of Molecular Genetics, Department of Research & Development, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - N Chongviriyaphan
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - J Santiprabhob
- Division of Endocrinology & Metabolism, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - R Tungtrongchitr
- Department of Tropical Nutrition & Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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Phoojaroenchanachai M, Buranakitjaroen P, Limwongse C. Liddle's Syndrome: A Case Report. J Med Assoc Thai 2015; 98:1035-1040. [PMID: 26638596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A thirty-eight years old female presented with frequent proximal weakness, severe hypertension, and persistent kaliuresis despite hypokalemia. After normalized serum potassium level, hyporeninemic hypoaldosteronism was detected Pedigree study supported an autosomal dominant inherited disease. A causative mutation for Liddle's syndrome (LS) in this patient was identified to be a novel frameshift mutation. DNA sequencing resulted in exon 13 of SCNN1B gene: SCNN1B NM_000336.2:c.1 724_1730dupGGCCCAC [p.Pro5 75Argfs*17]. Since LS is a rare existing clinical syndrome in Thailand, correct diagnosis should be confirmed by genetic studies. Therefore, proper management could be given.
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Panichareon B, Seedapan T, Thongnoppakhun W, Limwongse C, Pithukpakorn M, Limjindaporn T. Novel Mutation of the TINF2 Gene in a Patient with Dyskeratosis Congenita. Case Rep Dermatol 2015; 7:212-9. [PMID: 26351433 PMCID: PMC4560313 DOI: 10.1159/000439042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Dyskeratosis congenita (DKC) is a rare inherited disease that is characterized by abnormal skin pigmentation, nail dystrophy and mucosal leukoplakia. DKC is caused by an abnormality in a component of the telomerase and shelterin complexes. TINF2 encodes a protein in the shelterin complex and TERC encodes a component of the telomerase complex. Mutations of both genes have been associated with DKC. This study examined mutations in TINF2.
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Affiliation(s)
- Benjaporn Panichareon
- Department of Anatomy, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Thanawat Seedapan
- Department of Anatomy, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wanna Thongnoppakhun
- Division of Molecular Genetics, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Molecular Genetics, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Manop Pithukpakorn
- Division of Molecular Genetics, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Division of Medical Genetics, Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Thawornchai Limjindaporn
- Department of Anatomy, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Chuenta W, Phonrat B, Tungtrongchitr A, Limwongse C, Chongviriyaphan N, Santiprabhob J, Tungtrongchitr R. Common variations in the FTO gene and obesity in Thais: A family-based study. Gene 2015; 558:75-81. [DOI: 10.1016/j.gene.2014.12.050] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Revised: 12/11/2014] [Accepted: 12/20/2014] [Indexed: 11/28/2022]
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Korphaisarn K, Pongpaibul A, Limwongse C, Roothumnong E, Klaisuban W, Nimmannit A, Jinawath A, Akewanlop C. Deficient DNA mismatch repair is associated with favorable prognosis in Thai patients with sporadic colorectal cancer. World J Gastroenterol 2015; 21:926-934. [PMID: 25624727 PMCID: PMC4299346 DOI: 10.3748/wjg.v21.i3.926] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 07/30/2014] [Accepted: 09/19/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine the prognostic significance of deficient mismatch repair (dMMR) and BRAF V600E in Thai sporadic colorectal cancer (CRC) patients.
METHODS: We studied a total of 211 out of 405 specimens obtained from newly diagnosed CRC patients between October 1, 2006 and December 31, 2007 at Siriraj Hospital, Mahidol University. Formalin-fixed paraffin-embedded blocks of CRC tissue samples were analyzed for dMMR by detection of MMR protein expression loss by immunohistochemistry or microsatellite instability using polymerase chain reaction (PCR)-DHPLC. BRAF V600E mutational analysis was performed in DNA extracted from the same archival tissues by two-round allele-specific PCR and analyzed by high sensitivity DHPLC. Associations between patient characteristics, MMR and BRAF status with disease-free survival (DFS) and overall survival (OS) were determined by Kaplan-Meier survival plots and log-rank test together with Cox’s proportional hazard regression.
RESULTS: dMMR and BRAF V600E mutations were identified in 31 of 208 (14.9%) and 23 of 211 (10.9%) tumors, respectively. dMMR was more commonly found in patients with primary colon tumors rather than rectal cancer (20.4% vs 7.6%, P =0.01), but there was no difference in MMR status between the right-sided and left-sided colon tumors (20.8% vs 34.6%, P = 0.24). dMMR was associated with early-stage rather than metastatic disease (17.3% vs 0%, P = 0.015). No clinicopathological features such primary site or tumor differentiation were associated with the BRAF mutation. Six of 31 (19.3%) samples with dMMR carried the BRAF mutation, while 17 of 177 (9.6%) with proficient MMR (pMMR) harbored the mutation (P = 0.11). Notably, patients with dMMR tumors had significantly superior DFS (HR = 0.30, 95%CI: 0.15-0.77; P = 0.01) and OS (HR = 0.29, 95%CI: 0.10-0.84; P = 0.02) compared with patients with pMMR tumors. By contrast, the BRAF V600E mutation had no prognostic impact on DFS and OS.
CONCLUSION: The prevalence of dMMR and BRAF V600E in Thai sporadic CRC patients was 15% and 11%, respectively. The dMMR phenotype was associated with a favorable outcome.
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Kulanuwat S, Santiprabhob J, Phonrat B, Limwongse C, Tungtrongchitr A, Chongviriyaphan N, Tungtrongchitr R. Association between rs155971 in the PCSK1 gene and the lipid profile of obese Thai children: a family-based study. Genet Mol Res 2015; 14:9136-44. [DOI: 10.4238/2015.august.7.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Shotelersuk V, Limwongse C, Mahasirimongkol S. Genetics and genomics in Thailand: challenges and opportunities. Mol Genet Genomic Med 2014; 2:210-6. [PMID: 24936510 PMCID: PMC4049361 DOI: 10.1002/mgg3.83] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 04/07/2014] [Indexed: 12/16/2022] Open
Affiliation(s)
- Vorasuk Shotelersuk
- Center of Excellence for Medical Genetics, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University Bangkok, 10330, Thailand ; Excellence Center for Medical Genetics, King Chulalongkorn Memorial Hospital, the Thai Red Cross Society Bangkok, 10330, Thailand
| | - Chanin Limwongse
- Departments Medicine and Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University Bangkok, 10700, Thailand
| | - Surakameth Mahasirimongkol
- Medical Genetic Centre, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health Nonthaburi, 11000, Thailand
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Jinda W, Taylor TD, Suzuki Y, Thongnoppakhun W, Limwongse C, Lertrit P, Suriyaphol P, Trinavarat A, Atchaneeyasakul LO. Whole exome sequencing in Thai patients with retinitis pigmentosa reveals novel mutations in six genes. Invest Ophthalmol Vis Sci 2014; 55:2259-68. [PMID: 24618324 DOI: 10.1167/iovs.13-13567] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [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: 11/24/2022] Open
Abstract
PURPOSE To identify disease-causing mutations and describe genotype-phenotype correlations in Thai patients with nonsyndromic retinitis pigmentosa (RP). METHODS Whole exome sequencing was performed in 20 unrelated patients. Eighty-six genes associated with RP, Leber congenital amaurosis, and cone-rod dystrophy were analyzed for variant detection. RESULTS Seventeen variants (13 novel and 4 known) in 13 genes were identified in 11 patients. These variants include 10 missense substitutions, 2 nonsense mutations, 3 deletions, 1 insertion, and 1 splice site change. Nine patients with identified inheritance patterns carried a total of 10 potentially pathogenic mutations located in genes CRB1, C8orf37, EYS, PROM1, RP2, and USH2A. Three of the nine patients also demonstrated additional heterozygous variants in genes ABCA4, GUCY2D, RD3, ROM1, and TULP1. In addition, two patients carried variants of uncertain significance in genes FSCN2 and NR2E3. The RP phenotypes of our patients were consistent with previous reports. CONCLUSIONS This is the first report of mutations in Thai RP patients. These findings are useful for genotype-phenotype comparisons among different ethnic groups.
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Affiliation(s)
- Worapoj Jinda
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Chayakulkeeree M, Jitrmuang A, Waywa D, Sangsiriwut K, Bunditworapom D, Limwongse C, Koomanachai P. The first study of plasma voriconazole concentration in Thai patient with invasive aspergillosis. Int J Infect Dis 2014. [DOI: 10.1016/j.ijid.2014.03.489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Viprakasit V, Limwongse C, Sukpanichnant S, Ruangvutilert P, Kanjanakorn C, Glomglao W, Sirikong M, Utto W, Tanphaichitr VS. Problems in determining thalassemia carrier status in a program for prevention and control of severe thalassemia syndromes: a lesson from Thailand. Clin Chem Lab Med 2014; 51:1605-14. [PMID: 23525874 DOI: 10.1515/cclm-2013-0098] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 02/20/2013] [Indexed: 11/15/2022]
Abstract
BACKGROUND Prevention and control of severe β thalassemia by carrier detection and identification of couples at risk in developed countries is one of the most successful stories in modern medicine. Similar programs in developing countries especially Southeast Asia, are more problematic because both α and β thalassemias are highly prevalent. In Thailand, there are limited data on whether we could determine, based on hematological phenotypes, the mutation severity and/or coinheritance of α thalassemia in β thalassemia traits. METHODS Comprehensive molecular, hematology and hemoglobin analyses of the α and β globin genes were performed in 141 healthy individuals identified as β thalassemia carriers. RESULTS Seventeen different β globin mutations were successfully identified out of all cases analyzed. Although the majority of the mutations identified were the β⁰ or severe β⁺ thalassemia alleles, a high proportion of mild mutations (25%) was observed. Of these β thalassemia traits, 22.3% were found to co-inherit the α thalassemias. Milder hematological phenotypes were noted in β⁺ compared with β⁰ thalassemia traits when the α globin genes were intact. Although co-inheritance of α⁰ thalassemia might be suspected in cases with skewed profiles, due to the overlapping values, it remains difficult to apply these parameters for reliable carrier determination. CONCLUSIONS A combination of hemoglobin analysis and DNA testing seems to be the best way to confirm carrier status in a region with high frequency for both α and β thalassemias. Underdiagnoses of carrier status could hamper the effectiveness of a thalassemia prevention and control program.
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Affiliation(s)
- Vip Viprakasit
- Faculty of Medicine, Department of Pediatrics and Thalassemia Center, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand.
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Tanboon J, Rongsa K, Pithukpakorn M, Boonyapisit K, Limwongse C, Sangruchi T. A Novel Mutation of the GNE Gene in Distal Myopathy with Rimmed Vacuoles: A Case with Inflammation. Case Rep Neurol 2014; 6:55-9. [PMID: 24707269 PMCID: PMC3975748 DOI: 10.1159/000360730] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Distal myopathy with rimmed vacuoles (DMRV) is an autosomal recessive or sporadic early adult-onset myopathy caused by mutations in the UDP-N-acetylglucosamine 2-epimerase and N-acetylmannosamine kinase (GNE) gene. Characteristic pathologic features of DMRV are rimmed vacuoles on muscle biopsy and tubulofilamentous inclusion in ultrastructural study. Presence of inflammation in DMRV is unusual. We report a sporadic case of DMRV in a 40-year-old Thai man who presented with slowly progressive distal muscle weakness. Gene analysis revealed a compound heterozygous mutation of the GNE gene including a novel mutation c.1057A>G (p.K353E) and a known mutation c.2086G>A (p.V696M). The latter is the most common mutation in Thai DMRV patients. The muscle pathology was compatible with DMRV except for focal inflammation.
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Affiliation(s)
- Jantima Tanboon
- Department of Pathology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand ; Siriraj Neurogenetic Network, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kanjana Rongsa
- Siriraj Neurogenetic Network, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Manop Pithukpakorn
- Siriraj Neurogenetic Network, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand ; Department of Internal Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kanokwan Boonyapisit
- Siriraj Neurogenetic Network, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand ; Department of Internal Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Siriraj Neurogenetic Network, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand ; Department of Internal Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Tumtip Sangruchi
- Department of Pathology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand ; Siriraj Neurogenetic Network, Department of Research and Development, Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Kulanuwat S, Phonrat B, Tungtrongchitr A, Limwongse C, Chongviriyaphan N, Tungtrongchitr R, Santiprabhob J. Effects of PCSK1 genetic variants on obesity among Thai children and their family members: in relation to health risk, and biochemical and anthropometric parameters. Southeast Asian J Trop Med Public Health 2014; 45:214-225. [PMID: 24964673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Single nucleotide polymorphisms (SNPs) in PCSK1, namely, rs6234, rs6235, and rs271939 have been linked to obesity in European population; and rs3811951 has also been connected to type 2 diabetes and obesity parameters in Chinese population. In this family-based case-control study, we analyzed links between PCSK1 genetic variants and obesity in Thai children and their families. Eleven obese children with a percent weight for height > or = 140 who had family history of obesity and 69 family members were recruited. SNPs rs6234, rs6235, rs3811951, and rs271939 of PCSK1 were analyzed using PCR and gene sequencing methods. DNA of 200 normal weight subjects was used as control. Participants with variant genotypes in the rs6234-6235 pair are at significantly more risk of being obese [OR = 2.44 (1.35-4.43), p = 0.003], and also at increased risk of being severely obese (obese class III) [OR = 3.03 (1.20-7.66), p = 0.015]. Variant rs3811951 showed no association with being obese, but is significantly linked to an increased risk of being severely obese [OR = 3.59 (1.42-9.08) p = 0.005]. Moreover, high density lipoprotein (HDL)-C levels between normal and variant rs3811951 group differed considerably, with patients with variant genotype having a lower HDL-C level (p = 0.037). Thus, Thais carrying SNPs rs6234-5 are at increased risk of being obese, and the risk of severe obesity increases when carrying both rs6234-5 and rs3811951, but not with rs271939. Furthermore, patients with genetic variations at rs3811951 are at risk of having low HDL-C levels.
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Setsirichok D, Tienboon P, Jaroonruang N, Kittichaijaroen S, Wongseree W, Piroonratana T, Usavanarong T, Limwongse C, Aporntewan C, Phadoongsidhi M, Chaiyaratana N. An omnibus permutation test on ensembles of two-locus analyses can detect pure epistasis and genetic heterogeneity in genome-wide association studies. Springerplus 2013; 2:230. [PMID: 24804170 PMCID: PMC4006521 DOI: 10.1186/2193-1801-2-230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 04/24/2013] [Indexed: 01/20/2023]
Abstract
This article presents the ability of an omnibus permutation test on ensembles of two-locus analyses (2LOmb) to detect pure epistasis in the presence of genetic heterogeneity. The performance of 2LOmb is evaluated in various simulation scenarios covering two independent causes of complex disease where each cause is governed by a purely epistatic interaction. Different scenarios are set up by varying the number of available single nucleotide polymorphisms (SNPs) in data, number of causative SNPs and ratio of case samples from two affected groups. The simulation results indicate that 2LOmb outperforms multifactor dimensionality reduction (MDR) and random forest (RF) techniques in terms of a low number of output SNPs and a high number of correctly-identified causative SNPs. Moreover, 2LOmb is capable of identifying the number of independent interactions in tractable computational time and can be used in genome-wide association studies. 2LOmb is subsequently applied to a type 1 diabetes mellitus (T1D) data set, which is collected from a UK population by the Wellcome Trust Case Control Consortium (WTCCC). After screening for SNPs that locate within or near genes and exhibit no marginal single-locus effects, the T1D data set is reduced to 95,991 SNPs from 12,146 genes. The 2LOmb search in the reduced T1D data set reveals that 12 SNPs, which can be divided into two independent sets, are associated with the disease. The first SNP set consists of three SNPs from MUC21 (mucin 21, cell surface associated), three SNPs from MUC22 (mucin 22), two SNPs from PSORS1C1 (psoriasis susceptibility 1 candidate 1) and one SNP from TCF19 (transcription factor 19). A four-locus interaction between these four genes is also detected. The second SNP set consists of three SNPs from ATAD1 (ATPase family, AAA domain containing 1). Overall, the findings indicate the detection of pure epistasis in the presence of genetic heterogeneity and provide an alternative explanation for the aetiology of T1D in the UK population.
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Affiliation(s)
- Damrongrit Setsirichok
- Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, 1518 Pracharat Sai 1 Road, Bangsue, Bangkok 10800, Thailand
| | - Phuwadej Tienboon
- Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, 1518 Pracharat Sai 1 Road, Bangsue, Bangkok 10800, Thailand
| | - Nattapong Jaroonruang
- Department of Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha-utid Road, Bangmod, Toongkru, Bangkok 10140, Thailand
| | - Somkit Kittichaijaroen
- Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, 1518 Pracharat Sai 1 Road, Bangsue, Bangkok 10800, Thailand
| | - Waranyu Wongseree
- Division of Technology of Information System Management, Faculty of Engineering, Mahidol University, 25/25 Phuttamonthon 4 Road, Nakhon Pathom 73170, Salaya, Thailand
| | - Theera Piroonratana
- Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, 1518 Pracharat Sai 1 Road, Bangsue, Bangkok 10800, Thailand
| | - Touchpong Usavanarong
- Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, 1518 Pracharat Sai 1 Road, Bangsue, Bangkok 10800, Thailand
| | - Chanin Limwongse
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, 2 Prannok Road, Bangkok 10700, Bangkoknoi, Thailand
| | - Chatchawit Aporntewan
- Department of Mathematics and Computer Science, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Marong Phadoongsidhi
- Department of Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha-utid Road, Bangmod, Toongkru, Bangkok 10140, Thailand
| | - Nachol Chaiyaratana
- Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, 1518 Pracharat Sai 1 Road, Bangsue, Bangkok 10800, Thailand ; Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine Siriraj Hospital, Mahidol University, 2 Prannok Road, Bangkok 10700, Bangkoknoi, Thailand
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Korphaisarn K, Manuyakorn A, Roothumnong E, Klaisuban W, Nimmannit A, Jinawath A, Limwongse C, Akewanlop C. AOSP36 PREVALENCE OF DMMR IN SPORADIC COLORECTAL CANCER PATIENTS AT SIRIRAJ HOSPITAL. Eur J Cancer 2013. [DOI: 10.1016/s0959-8049(13)70047-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Prachason T, Konhan K, Pongnarin P, Chatsiricharoenkul S, Suputtamongkol Y, Limwongse C. Activation of indoleamine 2,3-dioxygenase in patients with scrub typhus and its role in growth restriction of Orientia tsutsugamushi. PLoS Negl Trop Dis 2012; 6:e1731. [PMID: 22860140 PMCID: PMC3409113 DOI: 10.1371/journal.pntd.0001731] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 06/01/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Our earlier genome-wide expression study revealed up-regulation of a tryptophan-catabolizing enzyme, indoleamine 2,3-dioxygenase (IDO1), in patients with scrub typhus. This gene has been previously reported to have anti-microbial activity in a variety of infectious diseases; therefore, we aimed to prove whether it is also involved in host defense against Orientia tsutsugamushi (OT) infection. METHODOLOGY/PRINCIPAL FINDINGS Using LC-MS, we observed an increased ratio of serum L-kynurenine to serum L-tryptophan in patients with scrub typhus, which suggests an active catalytic function of this enzyme upon the illness. To evaluate the effect of IDO1 activation on OT infection, a human macrophage-like cell line THP-1 was used as a study model. Although transcription of IDO1 was induced by OT infection, its functional activity was not significantly enhanced unless the cells were pretreated with IFN-γ, a potent inducer of IDO1. When the degree of infection was evaluated by quantitative real-time PCR, the relative number of OT 47 kDa gene per host genes, or infection index, was markedly reduced by IFN-γ treatment as compared to the untreated cultures at five days post-infection. Inhibition of IDO1 activity in IFN-γ treated cultures by 1-methyl-L-tryptophan, a competitive inhibitor of IDO1, resulted in partial restoration of infection index; while excessive supplementation of L-tryptophan in IFN-γ treated cultures raised the index to an even higher level than that of the untreated ones. Altogether, these data implied that IDO1 was partly involved in restriction of OT growth caused by IFN-γ through deprivation of tryptophan. CONCLUSIONS/SIGNIFICANCE Activation of IDO1 appeared to be a defensive mechanism downstream of IFN-γ that limited intracellular expansion of OT via tryptophan depletion. Our work provided not only the first link of in vivo activation of IDO1 and IFN-γ-mediated protection against OT infection but also highlighted the promise of this multifaceted gene in scrub typhus research.
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Affiliation(s)
- Thanavadee Prachason
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Department of Immunology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kanittha Konhan
- Department of Pharmacology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Piyapat Pongnarin
- Department of Pharmacology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Yupin Suputtamongkol
- Division of Infectious Diseases, Department of Internal Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Division of Molecular Genetics, Department of Research and Development, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Division of Medical Genetics, Department of Internal Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
- * E-mail:
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Pongtepaditep S, Limjindaporn T, Lertrit P, Srisawat C, Limwongse C. Polyglutamined expanded androgen receptor interacts with chaperonin CCT. Eur J Med Genet 2012; 55:599-604. [PMID: 22796525 DOI: 10.1016/j.ejmg.2012.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 06/21/2012] [Indexed: 11/17/2022]
Abstract
CCT chaperonin is a highly conserved molecular chaperone, which plays an important role in the folding of complex proteins in mammalian cells. CCT chaperonin interacts with huntingtin and results in decrease of aggregate formation followed by increase of cell survival. Using yeast-two-hybrid system, we screen for specific CCT chaperonin subunit, which can recognize and bind to androgen receptor. We show that subunit 6 of CCT chaperonin interacts with androgen receptor. Interestingly, CCT chaperonin shows higher binding affinity to polyglutamine expanded androgen receptor than that of the wild-type. We prove this interaction in mammalian cell models, which show co-localization of androgen receptor and subunit 6 of CCT in cellular cytosol. Therefore, not only huntingtin but also androgen receptor is a polyglutamine expanded protein, which is a substrate of CCT chaperonin. Our results suggest that CCT might play an essential role in modulation of folding of polyglutamine expanded proteins and could be another target for further therapeutic studies.
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Affiliation(s)
- Suttikarn Pongtepaditep
- Division of Molecular Genetics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Kantaputra PN, van den Ouweland A, Sangruchi T, Limwongse C. Severe plexiform facial neurofibromatosis, type 1 with underdeveloped eyes and a novel NF1 mutation. Am J Med Genet A 2012; 158A:1750-3. [PMID: 22678692 DOI: 10.1002/ajmg.a.35422] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Accepted: 03/26/2012] [Indexed: 11/11/2022]
Abstract
A Thai woman, who was affected with neurofibromatosis type 1, was followed up and re-evaluated at ages 45, 61, and 67 years. Her mother and her three brothers were also affected. The proposita was very severely affected. She was born blind with underdeveloped eyeglobes and had large plexiform neurofibromas on her face. Her eyelids were gigantic and tears drained from the orifice between them. Cutaneous neurofibromas were observed all over her body. A novel mutation c.4821delA was identified in NF1 gene, which predicted truncation of neurofibromin (p.Leu1607fs).
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Affiliation(s)
- Piranit Nik Kantaputra
- Division of Pediatric Dentistry, Department of Orthodontics and Pediatric Dentistry; Craniofacial Genetics Laboratory, Faculty of Dentistry, Chiang Mai University; Dental and Clinic, Chiang Mai, Thailand.
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Korphaisarn K, Roothumnong E, Nimmannit A, Limwongse C, Manuyakorn A, Klaisuban W, Akewanlop C. Prevalence of BRAF gene mutation in Thai sporadic colorectal cancer patients. J Clin Oncol 2012. [DOI: 10.1200/jco.2012.30.15_suppl.e14051] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e14051 Background: The role of BRAF gene mutation has been studied for its association with prognosis of colorectal cancer (CRC). The prevalence was reported 10-15% in Caucasian patients. However, there is no existing data in Thai patients. This study aimed to determine the prevalence of BRAF V600E mutation, association with various clinicopathological features and outcome in Thai sporadic CRC patients. Methods: DNA was extracted from randomly selected formalin-fixed paraffin-embedded tumor blocks of CRC patients with stage I-IV receiving surgery of the primary tumors at Siriraj Hospital between 2006 and 2007. BRAF V600E mutation was performed by two-round allele-specific PCR and analysis using high sensitivity DHPLC. The association between patient characteristics and BRAF status with overall survival (OS) and disease free survival (DFS) were explored by Kaplan-Meier estimation and log-rank test together with Cox’s proportional hazard regression. Results: BRAF V600E mutation was identified in 7 out of 188 patients (3.7%). Four patients were female. There were more likely to found in tumors on the left side (n=4) compared with right side (n=2) and rectum (n=1). All patients with mutation had stage I-III diseases; one with stage I and 3 with stage II and III each. Four had moderately differentiated tumors. Six patients had neither lymphovascular nor perineural invasion. Patients with mutation seemed to have better survival. In multivariate analysis, BRAF mutation did not have major prognostic value regarding DFS or OS. Conclusions: The prevalence of BRAF V600E mutation in Thai sporadic CRC was 3.7% which was lower than what reported in Caucasian patients. Further study with larger number of patients is warranted to determine whether BRAF mutation has significant prognostic value.
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Affiliation(s)
| | | | - Akarin Nimmannit
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Ananya Manuyakorn
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wipawi Klaisuban
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Charuwan Akewanlop
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Chokephaibulkit K, Cressey TR, Capparelli E, Sirisanthana V, Muresan P, Hongsiriwon S, Ngampiyaskul C, Limwongse C, Wittawatmongkol O, Aurpibul L, Kabat B, Toye M, Smith ME, Eksaengsri A, McIntosh K, Yogev R. Pharmacokinetics and safety of a new paediatric fixed-dose combination of zidovudine/lamivudine/nevirapine in HIV-infected children. Antivir Ther 2012; 16:1287-95. [PMID: 22155910 DOI: 10.3851/imp1931] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Alternatives to the available stavudine-containing paediatric fixed-dose combination (FDC) tablets are rapidly needed due to concerns regarding the cumulative toxicity of long-term stavudine exposure. We report the bioavailability and short-term safety of a novel paediatric FDC tablet of zidovudine (ZDV)/lamivudine (3TC)/nevirapine (NVP; 30/15/28 mg) in HIV-infected children. METHODS In this Phase I/II open-label pharmacokinetic study, 42 children weighing 6-30 kg treated with NVP-based HAART for ≥4 weeks were randomized to receive the FDC tablets (GPO-VIR Z30) or the liquid formulations. Dosing was weight-based. Intensive 12-h blood sampling was performed after 2 weeks; subjects then crossed-over to the alternate formulation at equal doses and sampling repeated 2 weeks later. Pharmacokinetic parameters were determined by non-compartmental analysis. Buccal-swab samples were collected for cytochrome P450 (CYP)2B6 polymorphism analysis. RESULTS With the FDC tablet, the geometric mean (90% CI) area under the curve (AUC) for ZDV, 3TC and NVP was 1.58 (1.49-1.68), 7.78 (7.38-8.19) and 68.88 (62.13-76.36) μg•h/ml, respectively. Rules for NVP therapeutic inadequacy were defined a priori, and despite lower NVP exposure with the tablet (P<0.001), the levels remained therapeutically adequate. ZDV AUC was similar between formulations. 3TC exposure was significantly higher with the tablet but comparable to historical data in adults and children taking branded tablets. While receiving the tablet, NVP AUC in children with CYP2B 516 GG (45%), GT (45%) and TT (10%) genotypes were 67.0, 74.5 and 106.4 μg•h/ml, respectively (P=0.04). CONCLUSIONS Disparities in drug exposure between formulations were observed; however, the FDC tablet delivered therapeutically adequate exposures of each drug and could well play an important role in simplifying antiretroviral treatment for children.
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Affiliation(s)
- Kulkanya Chokephaibulkit
- Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
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Assawamakin A, Wattanasirichaigoon D, Tocharoentanaphol C, Waeteekul S, Tansatit M, Thongnoppakhun W, Limwongse C. A novel maternally-derived insertional translocation resulting in partial trisomy 4q13.2-q22.1 with complex translocation t(8;20) in a family with intellectual disability. Am J Med Genet A 2012; 158A:901-8. [DOI: 10.1002/ajmg.a.35259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Accepted: 12/23/2011] [Indexed: 11/09/2022]
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46
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Setsirichok D, Piroonratana T, Wongseree W, Usavanarong T, Paulkhaolarn N, Kanjanakorn C, Sirikong M, Limwongse C, Chaiyaratana N. Classification of complete blood count and haemoglobin typing data by a C4.5 decision tree, a naïve Bayes classifier and a multilayer perceptron for thalassaemia screening. Biomed Signal Process Control 2012. [DOI: 10.1016/j.bspc.2011.03.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Setsirichok D, Piroonratana T, Assawamakin A, Usavanarong T, Limwongse C, Wongseree W, Aporntewan C, Chaiyaratana N. Small Ancestry Informative Marker panels for complete classification between the original four HapMap populations. INT J DATA MIN BIOIN 2012; 6:651-74. [DOI: 10.1504/ijdmb.2012.050249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Suwannasri P, Thongnoppakhun W, Pramyothin P, Assawamakin A, Limwongse C. Combination of multiplex PCR and DHPLC-based strategy for CYP2D6 genotyping scheme in Thais. Clin Biochem 2011; 44:1144-1152. [DOI: 10.1016/j.clinbiochem.2011.06.985] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 06/01/2011] [Accepted: 06/26/2011] [Indexed: 10/18/2022]
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Tantibhedhyangkul W, Prachason T, Waywa D, El Filali A, Ghigo E, Thongnoppakhun W, Raoult D, Suputtamongkol Y, Capo C, Limwongse C, Mege JL. Orientia tsutsugamushi stimulates an original gene expression program in monocytes: relationship with gene expression in patients with scrub typhus. PLoS Negl Trop Dis 2011; 5:e1028. [PMID: 21610853 PMCID: PMC3096591 DOI: 10.1371/journal.pntd.0001028] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Accepted: 02/22/2011] [Indexed: 12/14/2022] Open
Abstract
Orientia tsutsugamushi is the causal agent of scrub typhus, a public health problem in the Asia-Pacific region and a life-threatening disease. O. tsutsugamushi is an obligate intracellular bacterium that mainly infects endothelial cells. We demonstrated here that O. tsutsugamushi also replicated in monocytes isolated from healthy donors. In addition, O. tsutsugamushi altered the expression of more than 4,500 genes, as demonstrated by microarray analysis. The expression of type I interferon, interferon-stimulated genes and genes associated with the M1 polarization of macrophages was significantly upregulated. O. tsutsugamushi also induced the expression of apoptosis-related genes and promoted cell death in a small percentage of monocytes. Live organisms were indispensable to the type I interferon response and apoptosis and enhanced the expression of M1-associated cytokines. These data were related to the transcriptional changes detected in mononuclear cells isolated from patients with scrub typhus. Here, the microarray analyses revealed the upregulation of 613 genes, which included interferon-related genes, and some features of M1 polarization were observed in these patients, similar to what was observed in O. tsutsugamushi-stimulated monocytes in vitro. This is the first report demonstrating that monocytes are clearly polarized in vitro and ex vivo following exposure to O. tsutsugamushi. These results would improve our understanding of the pathogenesis of scrub typhus, during which interferon-mediated activation of monocytes and their subsequent polarization into an M1 phenotype appear critical. This study may give us a clue of new tools for the diagnosis of patients with scrub typhus.
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Affiliation(s)
- Wiwit Tantibhedhyangkul
- Unité de Recherche sur les Maladies Infectieuses Tropicales et Emergentes, Centre National de la Recherche Scientifique - Institut de Recherche pour le Développement Unité Mixte de Recherche 6236, Université de la Méditerranée, Faculté de Médecine, Marseille, France
- Department of Immunology, Mahidol University, Bangkok, Thailand
| | - Thanavadee Prachason
- Division of Molecular Genetics, Department of Research and Development, Mahidol University, Bangkok, Thailand
- Department of Immunology, Mahidol University, Bangkok, Thailand
| | - Duangdao Waywa
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Adil El Filali
- Unité de Recherche sur les Maladies Infectieuses Tropicales et Emergentes, Centre National de la Recherche Scientifique - Institut de Recherche pour le Développement Unité Mixte de Recherche 6236, Université de la Méditerranée, Faculté de Médecine, Marseille, France
| | - Eric Ghigo
- Unité de Recherche sur les Maladies Infectieuses Tropicales et Emergentes, Centre National de la Recherche Scientifique - Institut de Recherche pour le Développement Unité Mixte de Recherche 6236, Université de la Méditerranée, Faculté de Médecine, Marseille, France
| | - Wanna Thongnoppakhun
- Division of Molecular Genetics, Department of Research and Development, Mahidol University, Bangkok, Thailand
| | - Didier Raoult
- Unité de Recherche sur les Maladies Infectieuses Tropicales et Emergentes, Centre National de la Recherche Scientifique - Institut de Recherche pour le Développement Unité Mixte de Recherche 6236, Université de la Méditerranée, Faculté de Médecine, Marseille, France
| | - Yupin Suputtamongkol
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Christian Capo
- Unité de Recherche sur les Maladies Infectieuses Tropicales et Emergentes, Centre National de la Recherche Scientifique - Institut de Recherche pour le Développement Unité Mixte de Recherche 6236, Université de la Méditerranée, Faculté de Médecine, Marseille, France
| | - Chanin Limwongse
- Division of Molecular Genetics, Department of Research and Development, Mahidol University, Bangkok, Thailand
- Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Jean-Louis Mege
- Unité de Recherche sur les Maladies Infectieuses Tropicales et Emergentes, Centre National de la Recherche Scientifique - Institut de Recherche pour le Développement Unité Mixte de Recherche 6236, Université de la Méditerranée, Faculté de Médecine, Marseille, France
- * E-mail:
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Aggarwal S, Jinda W, Limwongse C, Atchaneeyasakul LO, Phadke SR. Run-on mutation in the PAX6 gene and chorioretinal degeneration in autosomal dominant aniridia. Mol Vis 2011; 17:1305-9. [PMID: 21633710 PMCID: PMC3103739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 05/04/2011] [Indexed: 12/03/2022] Open
Abstract
PURPOSE To identify the causative paired box 6 (PAX6) mutation in a family with autosomal dominant aniridia. METHODS A family with autosomal dominant aniridia with three affected individuals in two generations was investigated for the causative PAX6 mutation by single strand conformation polymorphism (SSCP) followed by sequencing of genomic DNA from peripheral blood. RESULTS A novel PAX6 mutation in the donor splice site of intron 12 was identified in all three affected individuals from the family. The automated splice site analysis web interface indicated a disturbance of splicing and it was predicted that this mutation could lead to an elimination of the normal stop codon and an abnormal 3' elongation of the mRNA. CONCLUSIONS We report a novel PAX6 mutation in autosomal dominant aniridia that presumably affects splicing. The presence of chorioretinal degeneration in one of the affected individual raises the possibility that run-on mutations are associated with chorioretinal involvement in aniridia.
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Affiliation(s)
- Shagun Aggarwal
- Department of Medical Genetics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Worapoj Jinda
- Department of Research and Development, Faculty of Medicine, Siriraj Hospital Mahidol University, Bangkok, Thailand
| | - Chanin Limwongse
- Department of Research and Development, Faculty of Medicine, Siriraj Hospital Mahidol University, Bangkok, Thailand
| | - La-ongsri Atchaneeyasakul
- Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital Mahidol University, Bangkok, Thailand
| | - Shubha R. Phadke
- Department of Medical Genetics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
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