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Dow R, DeLong C, Jiang G, Attili D, Creech J, Kraan R, Campbell K, Saraithong P, O’Shea S, Monteiro da Rocha A, McInnis MG, Herron TJ. Bipolar Patient-Specific In Vitro Diagnostic Test Reveals Underlying Cardiac Arrhythmia Phenotype Caused by Calcium Channel Genetic Risk Factor. Biol Psychiatry Glob Open Sci 2024; 4:100296. [PMID: 38560725 PMCID: PMC10978474 DOI: 10.1016/j.bpsgos.2024.100296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/12/2024] [Accepted: 02/02/2024] [Indexed: 04/04/2024] Open
Abstract
A common genetic risk factor for bipolar disorder is CACNA1C, a gene that is also critical for cardiac rhythm. The impact of CACNA1C mutations on bipolar patient cardiac rhythm is unknown. Here, we report the cardiac electrophysiological implications of a bipolar disorder-associated genetic risk factor in CACNA1C using patient induced pluripotent stem cell-derived cardiomyocytes. Results indicate that the CACNA1C bipolar disorder-related mutation causes cardiac electrical impulse conduction slowing mediated by impaired intercellular coupling via connexin 43 gap junctions. In vitro gene therapy to restore connexin 43 expression increased cardiac electrical impulse conduction velocity and protected against thioridazine-induced QT prolongation. Patients positive for bipolar disorder CACNA1C genetic risk factors may have elevated proarrhythmic risk for adverse events in response to psychiatric medications that slow conduction or prolong the QT interval. This in vitro diagnostic tool enables cardiac testing specific to patients with psychiatric disorders to determine their sensitivity to off-target effects of psychiatric medications.
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Affiliation(s)
- Rachel Dow
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, Michigan
| | - Cindy DeLong
- Michigan Medicine, Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - Guihua Jiang
- Michigan Medicine, Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - Durga Attili
- Michigan Medicine, Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - Jeffery Creech
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, Michigan
| | - Rachel Kraan
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, Michigan
| | - Katherine Campbell
- Michigan Medicine, Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - Prakaimuk Saraithong
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, Michigan
- Michigan Medicine, Internal Medicine-Cardiology, University of Michigan, Ann Arbor, Michigan
| | - Sue O’Shea
- Michigan Medicine, Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
- Michigan Medicine, Psychiatry Department, University of Michigan, Ann Arbor, Michigan
| | - Andre Monteiro da Rocha
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, Michigan
- Michigan Medicine, Internal Medicine-Cardiology, University of Michigan, Ann Arbor, Michigan
| | - Melvin G. McInnis
- Michigan Medicine, Psychiatry Department, University of Michigan, Ann Arbor, Michigan
| | - Todd J. Herron
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, Michigan
- Michigan Medicine, Internal Medicine-Cardiology, University of Michigan, Ann Arbor, Michigan
- Michigan Medicine, Molecular & Integrative Physiology, University of Michigan, Ann Arbor, Michigan
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Allan A, Creech J, Hausner C, Krajcarski P, Gunawan B, Poulin N, Kozlowski P, Clark CW, Dow R, Saraithong P, Mair DB, Block T, Monteiro da Rocha A, Kim DH, Herron TJ. High-throughput longitudinal electrophysiology screening of mature chamber-specific hiPSC-CMs using optical mapping. iScience 2023; 26:107142. [PMID: 37416454 PMCID: PMC10320609 DOI: 10.1016/j.isci.2023.107142] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 06/01/2023] [Accepted: 06/12/2023] [Indexed: 07/08/2023] Open
Abstract
hiPSC-CMs are being considered by the Food and Drug Administration and other regulatory agencies for in vitro cardiotoxicity screening to provide human-relevant safety data. Widespread adoption of hiPSC-CMs in regulatory and academic science is limited by the immature, fetal-like phenotype of the cells. Here, to advance the maturation state of hiPSC-CMs, we developed and validated a human perinatal stem cell-derived extracellular matrix coating applied to high-throughput cell culture plates. We also present and validate a cardiac optical mapping device designed for high-throughput functional assessment of mature hiPSC-CM action potentials using voltage-sensitive dye and calcium transients using calcium-sensitive dyes or genetically encoded calcium indicators (GECI, GCaMP6). We utilize the optical mapping device to provide new biological insight into mature chamber-specific hiPSC-CMs, responsiveness to cardioactive drugs, the effect of GCaMP6 genetic variants on electrophysiological function, and the effect of daily β-receptor stimulation on hiPSC-CM monolayer function and SERCA2a expression.
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Affiliation(s)
- Andrew Allan
- Cairn Research, Graveney Road, Faversham, Kent ME13 8UP UK
| | - Jeffery Creech
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
| | - Christian Hausner
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
| | - Peyton Krajcarski
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
| | - Bianca Gunawan
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
| | - Noah Poulin
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
| | - Paul Kozlowski
- Michigan Medicine, Internal Medicine-Cardiology, Ann Arbor, MI 48109, USA
| | - Christopher Wayne Clark
- University of Michigan, School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI 48109, USA
| | - Rachel Dow
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
| | - Prakaimuk Saraithong
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
- Michigan Medicine, Internal Medicine-Cardiology, Ann Arbor, MI 48109, USA
| | - Devin B. Mair
- Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Travis Block
- StemBioSys, Inc, 3463 Magic Drive, Suite 110, San Antonio, TX 78229, USA
| | - Andre Monteiro da Rocha
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
- Michigan Medicine, Internal Medicine-Cardiology, Ann Arbor, MI 48109, USA
| | - Deok-Ho Kim
- Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Todd J. Herron
- University of Michigan, Frankel Cardiovascular Regeneration Core Laboratory, Ann Arbor, MI 48109, USA
- Michigan Medicine, Internal Medicine-Cardiology, Ann Arbor, MI 48109, USA
- Michigan Medicine, Molecular & Integrative Physiology, Ann Arbor, MI 48109, USA
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Manning S, Xiao J, Li Y, Saraithong P, Paster BJ, Chen G, Wu Y, Wu TT. Novel Clustering Methods Identified Three Caries Status-Related Clusters Based on Oral Microbiome in Thai Mother–Child Dyads. Genes (Basel) 2023; 14:genes14030641. [PMID: 36980913 PMCID: PMC10048127 DOI: 10.3390/genes14030641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 03/08/2023] Open
Abstract
Early childhood caries (ECC) is a disease that globally affects pre-school children. It is important to identify both protective and risk factors associated with this disease. This paper examined a set of saliva samples of Thai mother–child dyads and aimed to analyze how the maternal factors and oral microbiome of the dyads influence the development of ECC. However, heterogeneous latent subpopulations may exist that have different characteristics in terms of caries development. Therefore, we introduce a novel method to cluster the correlated outcomes of dependent observations while selecting influential independent variables to unearth latent groupings within this dataset and reveal their association in each group. This paper describes the discovery of three heterogeneous clusters in the dataset, each with its own unique mother–child outcome trend, as well as identifying several microbial factors that contribute to ECC. Significantly, the three identified clusters represent three typical clinical conditions in which mother–child dyads have typical (cluster 1), high–low (cluster 2), and low–high caries experiences (cluster 3) compared to the overall trend of mother–child caries status. Intriguingly, the variables identified as the driving attributes of each cluster, including specific taxa, have the potential to be used in the future as caries preventive measures.
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Affiliation(s)
- Samantha Manning
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Jin Xiao
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Yihong Li
- Master of Public Health Program, Department of Public & Ecosystem Health, Cornell University, Ithaca, NY 14853, USA
- Correspondence: (Y.L.); (T.T.W.)
| | - Prakaimuk Saraithong
- Department of Internal Medicine, Medical School University of Michigan, Ann Arbor, MI 48109, USA
| | - Bruce J. Paster
- Molecular Microbiology & Genetics, The Forsyth Institute, Cambridge, MA 02142, USA
- Harvard School of Dental Medicine, Harvard University, Boston, MA 02142, USA
| | - George Chen
- Molecular Microbiology & Genetics, The Forsyth Institute, Cambridge, MA 02142, USA
| | - Yan Wu
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Tong Tong Wu
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642, USA
- Correspondence: (Y.L.); (T.T.W.)
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Li Y, Saraithong P, Zhang L, Dills A, Paster BJ, Xiao J, Wu TT, Jones Z. Dynamics of oral microbiome acquisition in healthy infants: A pilot study. Front Oral Health 2023; 4:1152601. [PMID: 37065420 PMCID: PMC10098328 DOI: 10.3389/froh.2023.1152601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 03/08/2023] [Indexed: 04/18/2023] Open
Abstract
Objectives The human oral microbiota is one of the most complex bacterial communities in the human body. However, how newborns initially acquire these bacteria remains largely unknown. In this study, we examined the dynamics of oral microbial communities in healthy infants and investigated the influence of the maternal oral microbiota on the acquisition of the infant's oral microbiota. We hypothesized that the infant oral microbial diversity increases with age. Methods One hundred and sixteen whole-salivary samples were collected from 32 healthy infants and their biological mothers during postpartum and 9- and 15-month well-infant visits. Bacterial genomic DNA was extracted and sequenced by Human Oral Microbe Identification using Next Generation Sequencing (HOMINGS) methods. The Shannon index was used to measure the microbial diversity of the infant-mother dyads (alpha diversity). The microbial diversity between the mother-infant dyads (beta-diversity) was calculated using the weighted non-phylogenetic Bray-Curtis distance in QIIME 1.9.1. Core microbiome analysis was performed using MicrobiomeAnalyst software. Linear discriminant analysis coupled with effect size analysis was used to identify differentially abundant features between mother and infant dyads. Results A total of 6,870,571 16S rRNA reads were generated from paired mother-infant saliva samples. Overall, oral microbial profiles significantly differed between the mother and infant groups (p < 0.001). The diversity of the salivary microbiomes in the infants increased in an age-dependent manner, whereas the core microbiome of the mothers remained relatively stable during the study period. Breastfeeding and gender did not affect the microbial diversity in infants. Moreover, infants had a greater relative abundance of Firmicutes and a lower abundance of Actinobacteria, Bacteroidetes, Fusobacteria, and Proteobacteria than their mothers. The SparCC correlation analysis demonstrated constant changes in infants' oral microbial community network (p < 0.05). Conclusions This study provides new evidence that the oral cavities of infants are colonized by a distinct group of bacterial species at birth. The acquisition and diversity of changes in oral microbial composition are dynamic during the first year of an infant's life. Before reaching the second birthday, the composition of the oral microbial community could be more similar to that of their biological mothers.
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Affiliation(s)
- Yihong Li
- Master of Public Health Program, Department of Public and Ecosystem Health, Cornell University, Ithaca, NY, United States
- Correspondence: Yihong Li
| | - Prakaimuk Saraithong
- Department of Internal Medicine, Medical School University of Michigan, Ann Arbor, MI, United States
| | - Lanxin Zhang
- Department of Molecular and Cell Biology, University of California Berkeley, Oakland, CA, United States
| | - Ashley Dills
- Family Translational Research Group, New York University College of Dentistry, New York, NY, United States
| | - Bruce J. Paster
- Molecular Microbiology & Genetics, The Forsyth Institute, Cambridge, MA, United States
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, MA, United States
| | - Jin Xiao
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States
| | - Tong Tong Wu
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY, United States
| | - Zachary Jones
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, NY, United States
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Sugihara K, Kitamoto S, Saraithong P, Nagao-Kitamoto H, Hoostal M, McCarthy C, Rosevelt A, Muraleedharan CK, Gillilland MG, Imai J, Omi M, Bishu S, Kao JY, Alteri CJ, Barnich N, Schmidt TM, Nusrat A, Inohara N, Golob JL, Kamada N. Mucolytic bacteria license pathobionts to acquire host-derived nutrients during dietary nutrient restriction. Cell Rep 2022; 40:111093. [PMID: 35858565 PMCID: PMC10903618 DOI: 10.1016/j.celrep.2022.111093] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/26/2022] [Accepted: 06/21/2022] [Indexed: 12/26/2022] Open
Abstract
Pathobionts employ unique metabolic adaptation mechanisms to maximize their growth in disease conditions. Adherent-invasive Escherichia coli (AIEC), a pathobiont enriched in the gut mucosa of patients with inflammatory bowel disease (IBD), utilizes diet-derived L-serine to adapt to the inflamed gut. Therefore, the restriction of dietary L-serine starves AIEC and limits its fitness advantage. Here, we find that AIEC can overcome this nutrient limitation by switching the nutrient source from the diet to the host cells in the presence of mucolytic bacteria. During diet-derived L-serine restriction, the mucolytic symbiont Akkermansia muciniphila promotes the encroachment of AIEC to the epithelial niche by degrading the mucus layer. In the epithelial niche, AIEC acquires L-serine from the colonic epithelium and thus proliferates. Our work suggests that the indirect metabolic network between pathobionts and commensal symbionts enables pathobionts to overcome nutritional restriction and thrive in the gut.
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Affiliation(s)
- Kohei Sugihara
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Sho Kitamoto
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Prakaimuk Saraithong
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Hiroko Nagao-Kitamoto
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Matthew Hoostal
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Caroline McCarthy
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Alexandra Rosevelt
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | | | - Merritt G Gillilland
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Jin Imai
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Maiko Omi
- Department of Biologic and Materials Sciences and Prosthodontics, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Shrinivas Bishu
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - John Y Kao
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | | | - Nicolas Barnich
- M2iSH, UMR1071 Inserm/University Clermont Auvergne, Clermont-Ferrand, France
| | - Thomas M Schmidt
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Asma Nusrat
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Naohiro Inohara
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Jonathan L Golob
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Nobuhiko Kamada
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA; WPI Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan.
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Wu TT, Xiao J, Manning S, Saraithong P, Pattanaporn K, Paster BJ, Chen T, Vasani S, Gilbert C, Zeng Y, Li Y. Multimodal Data Integration Reveals Mode of Delivery and Snack Consumption Outrank Salivary Microbiome in Association With Caries Outcome in Thai Children. Front Cell Infect Microbiol 2022; 12:881899. [PMID: 35677657 PMCID: PMC9168266 DOI: 10.3389/fcimb.2022.881899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/20/2022] [Indexed: 12/22/2022] Open
Abstract
Early childhood caries (ECC) is not only the most common chronic childhood disease but also disproportionately affects underserved populations. Of those, children living in Thailand have been found to have high rates of ECC and severe ECC. Frequently, the cause of ECC is blamed on a handful of cariogenic organisms, such as Streptococcus mutans and Streptococcus sobrinus. However, ECC is a multifactorial disease that results from an ecological shift in the oral cavity from a neutral pH (~7.5) to an acidic pH (<5.5) environment influenced by the host individual’s biological, socio-behavioral, and lifestyle factors. Currently, there is a lack of understanding of how risk factors at various levels influence the oral health of children at risk. We applied a statistical machine learning approach for multimodal data integration (parallel and hierarchical) to identify caries-related multiplatform factors in a large cohort of mother-child dyads living in Chiang Mai, Thailand (N=177). Whole saliva (1 mL) was collected from each individual for DNA extraction and 16S rRNA sequencing. A set of maternal and early childhood factors were included in the data analysis. Significantly, vaginal delivery, preterm birth, and frequent sugary snacking were found to increase the risk for ECC. The salivary microbial diversity was significantly different in children with ECC or without ECC. Results of linear discriminant analysis effect size (LEfSe) analysis of the microbial community demonstrated that S. mutans, Prevotella histicola, and Leptotrichia hongkongensis were significantly enriched in ECC children. Whereas Fusobacterium periodonticum was less abundant among caries-free children, suggesting its potential to be a candidate biomarker for good oral health. Based on the multimodal data integration and statistical machine learning models, the study revealed that the mode of delivery and snack consumption outrank salivary microbiome in predicting ECC in Thai children. The biological and behavioral factors may play significant roles in the microbial pathobiology of ECC and warrant further investigation.
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Affiliation(s)
- Tong Tong Wu
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY, United States
| | - Jin Xiao
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States
- *Correspondence: Yihong Li, ; Jin Xiao,
| | - Samantha Manning
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY, United States
| | - Prakaimuk Saraithong
- Department of Internal Medicine, Division of Infectious Diseases, Medical School University of Michigan, Ann Arbor, MI, United States
| | | | - Bruce J. Paster
- Department of Microbiology, Forsyth Institute, Cambridge, MA, United States
| | - Tsute Chen
- Department of Microbiology, Forsyth Institute, Cambridge, MA, United States
| | - Shruti Vasani
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States
| | - Christie Gilbert
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY, United States
| | - Yan Zeng
- Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, NY, United States
| | - Yihong Li
- Department of Public and Ecosystem Health, Cornell University Master of Public Health Program, Ithaca, NY, United States
- *Correspondence: Yihong Li, ; Jin Xiao,
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Nocito MC, Saraithong P, Newman EA, Thomas IH, Rainey WE, Lerario AM, Heider A, Else T. SUN-931 Characterization of an Ovarian Steroid Cell Tumor in a VHL Patient. J Endocr Soc 2020. [PMCID: PMC7207908 DOI: 10.1210/jendso/bvaa046.1344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Most ovarian steroid cell tumors arise sporadically. However, they can also be observed as a rare manifestation of von Hippel Lindau disease. Here, we present a clinical, pathological and molecular characterization of a steroid cell tumor in a VHL patient. A 14 year old girl with molecularly confirmed diagnosis of VHL developed hirsutism and amenorrhea. Initial clinical hormonal evaluation was notable for elevated 17-OHP of 406ng/dl, androstenedione 275ng/dl, and testosterone 102ng/dl. In order to exclude congenital adrenal hyperplasia as a common cause of hirsutism in adolescents, ACTH stimulation was performed, but no increase in 17-OHP was observed. Anti Muellerian hormone, inhibin (INH) A and INH B were normal. Imaging revealed a bilobed 6cm left adnexal mass. The mass was resected en bloc via a left oophorectomy. Pathological evaluation showed multinodular steroid cell tumor with clear cytoplasm and delicate vascular meshwork. Immunoprofiling demonstrated positivity for inhibin and calretinin; while renal cell carcinoma markers were negative. All laboratory values normalized post-surgery. In addition to clinical measurements pre- and post-surgery, steroid profiles were evaluated by LC-MS/MS. Quantitative RT-PCR analysis showed robust tumor expression of enzymes facilitating the production of androgens, but not estrogens. Further preliminary analysis by exome sequencing confirmed the known germline pathogenic variant in VHL, but no additional obvious somatic driver mutations were identified. Interestingly, the NGS analysis of different specimens from the same tumor revealed multiple different single base pair variants in the VHL gene as a second hit. In summary, hirsutism in VHL patients should raise the suspicion for unusual ovarian tumors. In contrary to the usual theory of a monoclonal expansion after loss of the wt VHL allele, this tumor appeared to be oligoclonal as evidenced by different somatic VHL mutations. This could be either explained by initial parallel occurrence of several clones or that the VHL second hit is not an initial event, but the mutation instead supports tumor expansion following initial steps of tumorigenesis.
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Salvo E, Saraithong P, Curtin JG, Janal MN, Ye Y. Reciprocal interactions between cancer and Schwann cells contribute to oral cancer progression and pain. Heliyon 2019; 5:e01223. [PMID: 30815600 PMCID: PMC6378335 DOI: 10.1016/j.heliyon.2019.e01223] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 12/06/2018] [Accepted: 02/06/2019] [Indexed: 12/23/2022] Open
Abstract
Pain associated with oral squamous cell carcinoma (oral SCC) decreases quality of life and survival. The interaction between cancer and the peripheral nerves is known to initiate and amplify pain and contribute to carcinogenesis. Schwann cells envelop peripheral nerves and are activated in response to neuronal damage. The contributions of Schwann cells to oral SCC progression and pain are unknown. Using a non-contact co-culture model, we demonstrate that Schwann cells (RSC-96) and oral SCC cells (HSC-3) reciprocally interact to promote proliferation, migration, and invasion. Schwann cell-oral SCC interaction leads to increased production of adenosine, which stimulates cell proliferation and migration of both cell types. The adenosine receptor A2B (ADORA2B) is expressed on RSC-96 cells. We show that supernatant from the RSC-96 cells co-cultured with HSC-3 cells induces increased mechanical hypersensitivity in mice compared to supernatant from control RSC-96 cells. Treatment with the ADORA2B antagonist PSB603 significantly inhibits co-culture interactions - proliferation and migration, and co-culture supernatant induced mechanical hypersensitivity. RSC-96 cells co-cultured with HSC-3 cells secrete increased amounts of the pronociceptive mediator, interleukin-6 (IL-6), which can be reduced by adding PSB603 into the co-culture. Our data support a reciprocal interaction between oral SCC and Schwann cells mediated by adenosine with potential to promote oral SCC progression and pain via increased secretion of IL-6.
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Affiliation(s)
- Elizabeth Salvo
- Bluestone Center for Clinical Research, New York University College of Dentistry, New York, NY, 10010, USA
| | - Prakaimuk Saraithong
- Bluestone Center for Clinical Research, New York University College of Dentistry, New York, NY, 10010, USA
| | - Jared G. Curtin
- DDS Program, New York University College of Dentistry, New York, NY, 10010, USA
| | - Malvin N. Janal
- Epidemiology and Health Promotion, New York University College of Dentistry, New York, NY, 10010, USA
| | - Yi Ye
- Bluestone Center for Clinical Research, New York University College of Dentistry, New York, NY, 10010, USA
- Department of Oral and Maxillofacial Surgery, New York University College of Dentistry, New York, NY, 10010, USA
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Li Y, Saraithong P, Chen Z, Leung E, Pattanaporn K, Dasanayake A. Comparison of Real-Time Quantitative PCR with a Chairside Test for Streptococcus Mutans Assessment. Chin J Dent Res 2018; 20:199-210. [PMID: 29181457 DOI: 10.3290/j.cjdr.a39219] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To compare two methods for Streptococcus mutans detection and quantification in the human oral cavity: a chairside commercial test and a molecular-based real-time quantitative polymerase chain reaction (qPCR) method. METHODS A total of 688 whole saliva samples were collected from 344 children aged 3 and 5 and their biological mothers. Caries status was examined using a World Health Organisation survey method. S. mutans levels were measured using the Dentocult SM Strip mutans test and scored as colony forming units per millilitre of saliva. Meanwhile, bacterial genomic DNA was extracted from the saliva, qPCR was performed with S. mutans species-specific primers, and absolute S. mutans DNA concentrations were obtained and scored as micrograms of DNA per millilitre of saliva. The two methods were compared for sensitivity, specificity, agreement and correlation with caries status. RESULTS Significantly more participants tested positive for S. mutans by qPCR than in the chairside SM Strip test (82.4% vs 71.4%). When only the highest and lowest test scores were considered, the agreement between the two methods assessing S. mutans colonisation was 0.956. Children with high levels of S. mutans in their saliva were six to eight times more likely to develop dental caries at 5 years old. CONCLUSION The study provides new evidence supporting the use of the chairside SM Strip test or the qPCR assay for the detection and quantification of S. mutans colonisation in saliva as the analytical approach of choice for caries risk assessment in clinical and epidemiological studies.
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Saraithong P, Li Y, Saenphet K, Chen Z, Chantawannakul P. Midgut bacterial communities in the giant Asian honeybee (Apis dorsata) across 4 developmental stages: A comparative study. Insect Sci 2017; 24:81-92. [PMID: 26299408 DOI: 10.1111/1744-7917.12271] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/18/2015] [Indexed: 06/04/2023]
Abstract
Bacterial communities are known to play important roles during the developmental stages of insects, but current knowledge of bacteria associated with the midgut of Apis dorsata, the giant Asian honeybee, is limited. Using polymerase chain reaction-denaturing gradient gel electrophoresis analysis (PCR-DGGE) and 16S rRNA sequencing, the aim of this study was to determine the dynamics of bacterial community structure across four A. dorsata life stages in different geographical locations. The results reveal that bacterial diversity increased as the bee progressed through larval stage to newly emerged worker and old worker. However, in the pupal stage, no bands identified as bacteria could be observed. Overall, 2 bacterial phyla (Proteobacteria and Firmicutes) and 4 classes (Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, and Bacilli) were identified, but the frequency varied among the different stages and locations. The classes of Gammaproteobacteria and Bacilli dominated among larval, newly emerged worker and old worker developmental stages.
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Affiliation(s)
- Prakaimuk Saraithong
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, NY, 10010, USA
| | - Yihong Li
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, NY, 10010, USA
| | - Kanokporn Saenphet
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Zhou Chen
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, NY, 10010, USA
| | - Panuwan Chantawannakul
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
- Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
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Saraithong P, Li Y, Saenphet K, Chen Z, Chantawannakul P. Bacterial community structure in Apis florea larvae analyzed by denaturing gradient gel electrophoresis and 16S rRNA gene sequencing. Insect Sci 2015; 22:606-618. [PMID: 25393530 DOI: 10.1111/1744-7917.12155] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/12/2014] [Indexed: 06/04/2023]
Abstract
This study characterizes the colonization and composition of bacterial flora in dwarf Asian honeybee (Apis florea) larvae and compares bacterial diversity and distribution among different sampling locations. A. florea larvae were collected from 3 locations in Chiang Mai province, Thailand. Bacterial DNA was extracted from each larva using the phenol-chloroform method. Denaturing gradient gel electrophoresis was performed, and the dominant bands were excised from the gels, cloned, and sequenced for bacterial species identification. The result revealed similarities of bacterial community profiles in each individual colony, but differences between colonies from the same and different locations. A. florea larvae harbor bacteria belonging to 2 phyla (Firmicutes and Proteobacteria), 5 classes (Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Bacilli, and Clostridia), 6 genera (Clostridium, Gilliamella, Melissococcus, Lactobacillus, Saccharibacter, and Snodgrassella), and an unknown genus from uncultured bacterial species. The classes with the highest abundance of bacteria were Alphaproteobacteria (34%), Bacilli (25%), Betaproteobacteria (11%), Gammaproteobacteria (10%), and Clostridia (8%), respectively. Similarly, uncultured bacterial species were identified (12%). Environmental bacterial species, such as Saccharibacter floricola, were also found. This is the first study in which sequences closely related to Melissococcus plutonius, the causal pathogen responsible for European foulbrood, have been identified in Thai A. florea larvae.
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Affiliation(s)
- Prakaimuk Saraithong
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, 10010, USA
| | - Yihong Li
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, 10010, USA
| | - Kanokporn Saenphet
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Zhou Chen
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, 10010, USA
| | - Panuwan Chantawannakul
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
- Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
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Abstract
Lactobacilli have been associated with dental caries for over a century. Here, we review the pertinent literature along with findings from our own study to formulate a working hypothesis about the natural history and role of lactobacilli. Unlike most indigenous microbes that stably colonize a host, lactobacilli appear to be planktonic, opportunistic settlers that can gather and multiply only in certain restrictive niches of the host, at least within the oral cavity. We postulate that the following essential requirements are necessary for sustained colonization of lactobacilli in humans: 1) a stagnant, retentive niche that is mostly anaerobic; 2) a low pH milieu; and 3) ready access to carbohydrates. Three sites on the human body meet these specifications: caries lesions, the stomach, and the vagina. Only a handful of Lactobacillus species is found in caries lesions, but they are largely absent in caries-free children. Lactobacilli present in caries lesions represent both a major contributor to caries progression and a major reservoir to the gastrointestinal (GI) tract. We extend the assertion from other investigators that lactobacilli found in the GI tract originate in the oral cavity by proposing that lactobacilli in the oral cavity arise from caries lesions. This, in turn, leads us to reflect on the health implications of the lactobacilli in the mouth and downstream GI and to ponder whether these or any of the Lactobacillus species are truly indigenous to the human GI tract or the oral cavity.
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Affiliation(s)
- P W Caufield
- New York University College of Dentistry, New York, USA
| | - C N Schön
- New York University College of Dentistry, New York, USA
| | - P Saraithong
- New York University College of Dentistry, New York, USA
| | - Y Li
- New York University College of Dentistry, New York, USA
| | - S Argimón
- New York University College of Dentistry, New York, USA
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Li Y, Argimón S, Schön CN, Saraithong P, Caufield PW. Characterizing Diversity of Lactobacilli Associated with Severe Early Childhood Caries: A Study Protocol. Adv Microbiol 2015; 5:9-20. [PMID: 26413427 PMCID: PMC4583140 DOI: 10.4236/aim.2015.51002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Lactobacilli have been consistently associated with dental caries for decades; however, knowledge of this group of bacteria in the etiology of the disease is limited to quantitative elucidation. Nowadays, explicit identification of oral Lactobacillus species is possible, despite their taxonomic complexity. Here we describe a combined approach involving both cultivation and genetic methods to ascertain and characterize the diversity and abundance of the Lactobacillus population in the oral cavities of children with severe early childhood caries (S-ECC). Eighty 3- to 6-year-old children (40 S-ECC and 40 caries free) who were seeking dental care at the Pediatric Dental Clinic of Bellevue Hospital in New York City were invited to participate in this study. Clinical data on socio-demographic information and oral health behavior were obtained from the primary caregiver. The data included a detailed dental examination, children's medical history, and a questionnaire survey. Combined non-stimulated saliva and supra-gingival plaque samples were collected from each child and cultivated on selective media for quantitative measures of lactobacilli levels. The procedure for Lactobacillus species screening will include the random selection of 50 colonies per plate, extraction of DNA from each colony, and genotyping by arbitrarily primed polymerase chain reaction (AP-PCR). Each unique Lactobacillus AP-PCR genotype will be selected for taxonomic assessment by 16S rRNA gene sequencing analysis. Lactobacillus species will be identified by comparing the 16S rRNA sequences with the Ribosomal Database and the Human Oral Microbiome Database. Meanwhile, the same set of clinical samples will be independently subjected to genomic DNA isolation, 16S rRNA amplification with Lactobacillus genus-specific primers, sequencing, and taxonomic identification, both at genus and species levels with a customized pipeline. The distribution and phylogenetic differences of these Lactobacillus species will be compared between children with or without S-ECC. One of the main objectives of this study is to establish a study protocol for the identification and characterization of lactobacilli in the oral cavity. Future caries risk assessments can include lactobacilli counts (quantitative) and the presence/absence of specific cariogenic genetic signatures of a Lactobacillus species (qualitative) associated with S-ECC.
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Affiliation(s)
- Yihong Li
- Department of Basic Science and Craniofacial Biology, College of Dentistry, New York University, New York, USA
| | - Silvia Argimón
- Department of Cariology and Comprehensive Care, College of Dentistry, New York University, New York, USA
| | - Catherine N. Schön
- Department of Cariology and Comprehensive Care, College of Dentistry, New York University, New York, USA
| | - Prakaimuk Saraithong
- Department of Basic Science and Craniofacial Biology, College of Dentistry, New York University, New York, USA
| | - Page W. Caufield
- Department of Cariology and Comprehensive Care, College of Dentistry, New York University, New York, USA
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Pattanaporn K, Saraithong P, Khongkhunthian S, Aleksejuniene J, Laohapensang P, Chhun N, Chen Z, Li Y. Mode of delivery, mutans streptococci colonization, and early childhood caries in three- to five-year-old Thai children. Community Dent Oral Epidemiol 2012; 41:212-23. [PMID: 23106389 DOI: 10.1111/cdoe.12013] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Accepted: 09/16/2012] [Indexed: 02/01/2023]
Abstract
OBJECTIVE To investigate whether mode of delivery is associated with mutans streptococci (MS) colonization and early childhood caries (ECC) in preschool Thai children. METHODS Three hundred and fifty mothers and their 3- to 5-year-old children (184 born vaginally and 166 born by Caesarean section) participated in the study. Data included a dental examination, MS colonization assessed by the Dentocult(®) SM Strip Mutans method, and a questionnaire survey of family socio-demographic information, as well as children's birth history, dietary habits, and oral health practices. RESULTS Overall, ECC prevalence was 56% in 3-year-old and 78% in 5-year-old Thai children. Compared to children delivered by C-section, vaginally born children experienced increased ECC prevalence (73.8% versus 59.6%; P = 0.009) and were more likely to have higher MS scores (OR = 1.8, 95% CI = 1.1-2.9), adjusting for mother's gestational age, MS score, feeding practice habits; child's age and tooth brushing habits. Children's MS scores were highly correlated with their mothers' MS scores (P < 0.001). Additionally, children's age, MS colonization, and mothers' prechewing feeding habits were the most significant risk indicators for ECC in Thai children. CONCLUSION Our findings suggest that mode of delivery is significantly correlated with MS colonization and caries outcomes in young Thai children. Future studies are needed to further understand the possible biological mechanisms linking mode of child delivery to the colonization of cariogenic microbiota and development of ECC.
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Affiliation(s)
- K Pattanaporn
- Department of Oral Health Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, BC, Canada
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Bandhaya P, Saraithong P, Likittanasombat K, Hengprasith B, Torrungruang K. Aggregatibacter actinomycetemcomitans serotypes, the JP2 clone and cytolethal distending toxin genes in a Thai population. J Clin Periodontol 2012; 39:519-25. [PMID: 22471788 DOI: 10.1111/j.1600-051x.2012.01871.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/2012] [Indexed: 11/27/2022]
Abstract
AIM To examine the genetic diversity of Aggregatibacter actinomycetemcomitans in Thai adults. MATERIALS AND METHODS Subgingival plaque samples from 453 subjects were analysed for A. actinomycetemcomitans serotypes, the presence of the high leukotoxin-producing JP2 clone and cytolethal distending toxin genes (cdtABC) using the polymerase chain reaction technique. In subjects who were positive for cdtABC, restriction fragment length polymorphism analysis was used to identify a single nucleotide polymorphism (SNP) in the cdtB gene at amino acid position 281. The extent and severity of periodontal disease were compared between subjects harbouring different A. actinomycetemcomitans genotypes. RESULTS Eighty six subjects (19%) were positive for A. actinomycetemcomitans. The JP2 clone was not detected. Serotype c was the most prevalent (57%), followed by serotypes a (33%) and b (7%). Among A. actinomycetemcomitans-positive subjects, 27% were positive for cdtABC. All cdtABC-positive subjects possessed the SNP in the cdtB, which is involved with increased toxin activity. The presence of A. actinomycetemcomitans, but not a specific genotype, was significantly related to increased probing depth and periodontal attachment loss. CONCLUSIONS Our results confirm the previous findings that genotype distribution of A. actinomycetemcomitans varies between ethnic groups. However, no clear relationship between a specific genotype and periodontal conditions was observed.
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Affiliation(s)
- Panwadee Bandhaya
- Section of Periodontology, Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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