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Lotia S, Patel S, Patel A, Patel V, Shah K, Tanavde V. Unravelling the role of Silibinin in targeting CD44+ cancer stem cells: Therapeutic implications, effective strategies and approaches. Phytother Res 2024; 38:1830-1837. [PMID: 38353369 DOI: 10.1002/ptr.8150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/25/2024] [Accepted: 01/26/2024] [Indexed: 04/10/2024]
Abstract
CD44+ cancer stem cells (CSCs) are believed to account for drug resistance and tumour recurrence due to their potential to self-renew and differentiate into heterogeneous lineages. Therefore, efficient treatment strategies targeting and eliminating these CSCs are required. The flavonolignan, Silibinin, has gained immense attention in targeting CD44+ CSCs as it alters functional properties like cell cycle arrest, apoptosis, inhibition of invasion and metastasis and also inhibits a range of molecular pathways. However, its limited bioavailability is a major hurdle in asserting Silibinin as a translational therapeutic agent. Combinatorial therapy of Silibinin with conventional chemotherapeutic drugs is an alternative approach in targeting CD44+ CSCs as it increases the efficacy and reduces the cytotoxicity of chemotherapeutic drugs, thus preventing drug resistance. Certain Silibinin-conjugated nano-formulations have also been successfully developed, through which there is improved absorptivity/bioavailability of Silibinin and a decrease in the concentration of therapeutic drugs leading to reduced cytotoxicity. In this review, we summarise the effectiveness of the synergistic therapeutic approach for Silibinin in targeting the molecular mechanisms of CD44+ CSCs and emphasise the potential role of Silibinin as a novel therapeutic agent.
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Affiliation(s)
- Shreya Lotia
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Shanaya Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Aditi Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Vaishnavi Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Kanisha Shah
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Vivek Tanavde
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
- Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore, Singapore
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Patel A, Patel P, Mandlik D, Patel K, Malaviya P, Johar K, Swamy KBS, Patel S, Tanavde V. Correction: A novel 3-miRNA network regulates tumour progression in oral squamous cell carcinoma. Biomark Res 2024; 12:28. [PMID: 38409134 PMCID: PMC10898148 DOI: 10.1186/s40364-024-00575-z] [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: 02/28/2024] Open
Affiliation(s)
- Aditi Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, 380009, Ahmedabad, Gujarat, India
| | - Parina Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, 380009, Ahmedabad, Gujarat, India
| | - Dushyant Mandlik
- Department of Head and Neck Oncology, HCG Cancer Centre, Ahmedabad, Gujarat, India
| | - Kaustubh Patel
- Department of Head and Neck Oncology, HCG Cancer Centre, Ahmedabad, Gujarat, India
| | - Pooja Malaviya
- Department of Cell and Molecular Biology, Iladevi Cataract and IOL Research Centre, Ahmedabad, Gujarat, India
| | - Kaid Johar
- Department of Zoology, BMTC and Human Genetics, School of Sciences, Gujarat University, Ahmedabad, India
| | - Krishna B S Swamy
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, 380009, Ahmedabad, Gujarat, India
| | - Shanaya Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, 380009, Ahmedabad, Gujarat, India.
| | - Vivek Tanavde
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, 380009, Ahmedabad, Gujarat, India
- Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore, Singapore
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Patel A, Patel P, Mandlik D, Patel K, Malaviya P, Johar K, Swamy KBS, Patel S, Tanavde V. A novel 3-miRNA network regulates tumour progression in oral squamous cell carcinoma. Biomark Res 2023; 11:64. [PMID: 37316916 PMCID: PMC10268489 DOI: 10.1186/s40364-023-00505-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 02/06/2023] [Accepted: 05/19/2023] [Indexed: 06/16/2023] Open
Abstract
BACKGROUND Late diagnosis is one of the major confounders in oral squamous cell carcinoma (OSCC). Despite recent advances in molecular diagnostics, no disease-specific biomarkers are clinically available for early risk prediction of OSCC. Therefore, it is important to identify robust biomarkers that are detectable using non-invasive liquid biopsy techniques to facilitate the early diagnosis of oral cancer. This study identified potential salivary exosome-derived miRNA biomarkers and crucial miRNA-mRNA networks/underlying mechanisms responsible for OSCC progression. METHODS Small RNASeq (n = 23) was performed in order to identify potential miRNA biomarkers in both tissue and salivary exosomes derived from OSCC patients. Further, integrated analysis of The Cancer Genome Atlas (TCGA) datasets (n = 114), qPCR validation on larger patient cohorts (n = 70) and statistical analysis with various clinicopathological parameters was conducted to assess the effectiveness of the identified miRNA signature. miRNA-mRNA networks and pathway analysis was conducted by integrating the transcriptome sequencing and TCGA data. The OECM-1 cell line was transfected with the identified miRNA signature in order to observe its effect on various functional mechanisms such as cell proliferation, cell cycle, apoptosis, invasive as well as migratory potential and the downstream signaling pathways regulated by these miRNA-mRNA networks. RESULTS Small RNASeq and TCGA data identified 12 differentially expressed miRNAs in OSCC patients compared to controls. On validating these findings in a larger cohort of patients, miR-140-5p, miR-143-5p, and miR-145-5p were found to be significantly downregulated. This 3-miRNA signature demonstrated higher efficacy in predicting disease progression and clinically correlated with poor prognosis (p < 0.05). Transcriptome, TCGA, and miRNA-mRNA network analysis identified HIF1a, CDH1, CD44, EGFR, and CCND1 as hub genes regulated by the miRNA signature. Further, transfection-mediated upregulation of the 3-miRNA signature significantly decreased cell proliferation, induced apoptosis, resulted in G2/M phase cell cycle arrest and reduced the invasive and migratory potential by reversing the EMT process in the OECM-1 cell line. CONCLUSIONS Thus, this study identifies a 3-miRNA signature that can be utilized as a potential biomarker for predicting disease progression of OSCC and uncovers the underlying mechanisms responsible for converting a normal epithelial cell into a malignant phenotype.
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Affiliation(s)
- Aditi Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, 380009, Gujarat, India
| | - Parina Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, 380009, Gujarat, India
| | - Dushyant Mandlik
- Department of Head and Neck Oncology, HCG Cancer Centre, Ahmedabad, Gujarat, India
| | - Kaustubh Patel
- Department of Head and Neck Oncology, HCG Cancer Centre, Ahmedabad, Gujarat, India
| | - Pooja Malaviya
- Department of Cell and Molecular Biology, Iladevi Cataract and IOL Research Centre, Ahmedabad, Gujarat, India
| | - Kaid Johar
- Department of Zoology, BMTC and Human Genetics, School of Sciences, Gujarat University, Ahmedabad, India
| | - Krishna B S Swamy
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, 380009, Gujarat, India
| | - Shanaya Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, 380009, Gujarat, India.
| | - Vivek Tanavde
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, 380009, Gujarat, India.
- Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore, Singapore.
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Patel A, Patel S, Lotia S, Tanavde V. Abstract 1743: miR-1307-5p reverses cisplatin resistance in oral squamous cell carcinomas (OSCC) by targeting EHF, a modulator of stemness genes. Cancer Res 2023. [DOI: 10.1158/1538-7445.am2023-1743] [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: 04/07/2023]
Abstract
Abstract
Background: We have previously identified miR-1307-5p is exclusively expressed in OSCC tumors and is significantly upregulated in chemo-resistant patients. In this study, we investigate the mechanism of miR-1307-5p in conferring therapeutic refractoriness and demonstrate reversal of cisplatin induced chemoresistance. This study provides a potentially new therapeutic target for treating recurrent oral carcinomas.
Methods: Expression of miR-1307-5p was validated in OSCC patients (n=86), OECM1 cell line and cisplatin resistant CD44+ subpopulation. miR-1307-5p was knocked down in OECM1 and CD44+ cells and its effect on cell proliferation, apoptosis, cell cycle, migration, invasion and sphere forming abilities was measured. We examined the transcriptome of these patients (n=30) and combined this data with The Cancer Genome Atlas (TCGA) dataset for target prediction (TargetScan) and network analysis (Ingenuity Pathway Analysis). The hub genes were considered to be potential targets of miR-1307-5p and were validated by luciferase assay and Western Blotting.
Results: Sequencing analysis revealed exclusive expression of miR-1307-5p in the OSCC patient cohort with significant upregulation in chemo-resistant cases (FC:4.82 ± 2.38, p-value:0.01). miR-1307-5p upregulation separated the chemoresistant and remission cohorts (p<0.05). Transfection-mediated silencing of miR-1307-5p in OECM1(FC:0.009 ± 1.5, p:0.01) and CD44+ (FC:0.06 ± 2.3, p:0.01) cells restrained the cell proliferation rates (p<0.01) and revealed a significant sub G0 population of OECM1 (20±5%) and CD44+(18.7±3%) cells, indicating early apoptosis. A significant Annexin V+/PI- population (OECM1: 40%±3.36%; CD44+: 23%±3.36%) confirmed induction of apoptosis, post-silencing. A 2 fold reduction in the sphere-forming ability and invasive potentials of CD44+ cells observed post-knockdown (p>0.05). Combinatorial treatment of cisplatin and miR-1307-5p inhibitor reduced the proliferation rate of CD44+ cells by 66.23% in comparison to standalone treatment of the inhibitor (p:0.034). Thus, indicating role of miR-1307-5p in reversal of chemo-resistance. Gene target identification revealed miR-1307-5p could promote therapeutic refractoriness by suppressing the expression of EHF, which regulates cancer stem cell renewal by targeting Sox-2, Oct-4 and Nanog. Dual-luciferase gene reporter assay revealed direct suppression of EHF by miR-1307-5p. Further, knockdown of miR-1307-5p increased endogenous EHF mRNA and protein expression in cancer cells.
Conclusion: miR1307-5p downregulates EHF which is an inhibitor of many stemness genes like Sox-2, Oct-4 and Nanog. Knockdown of miR-1307-5p reverses Cisplatin resistance by upregulating EHF thus suppressing the emergence of cancer stem cells in OSCC.
Citation Format: Aditi Patel, Shanaya Patel, Shreya Lotia, Vivek Tanavde. miR-1307-5p reverses cisplatin resistance in oral squamous cell carcinomas (OSCC) by targeting EHF, a modulator of stemness genes [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 1743.
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Patel S, Patel A, Nair A, Shah K, Shah K, Tanavde V, Rawal R. Salinomycin mediated therapeutic targeting of circulating stem like cell population in oral cancer. J Biomol Struct Dyn 2022; 40:11141-11153. [PMID: 34308783 DOI: 10.1080/07391102.2021.1957018] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
CD44+ circulating tumor stem cells (CTSCs) have been significantly associated with aggressiveness, resistance and poor prognosis of oral cancer patients. Thus, targeted elimination of these CTSCs could be a new conceptual framework for enhancing the therapeutic outcome of patients. Docking of potential investigational molecules and simulation results identified Salinomycin as a potential lead compound that could effectively inhibit CD44 receptor. To assess the cytotoxic effect, immuno-magnetically sorted circulatory CD44+ cells were subjected to increasing concentrations of 5FU, Cisplatin and Salinomycin. Salinomycin demonstrated significant cytotoxic effect towards the CD44+ subpopulation in a dose and time dependent manner. Further the effect of these compounds was investigated on apoptosis, cell cycle, signaling pathways and gene expression profiles using MuseTM flow cytometer and Real-Time PCR. It was observed that mRNA expression patterns of CD44v6, Nanog, AKT1, CDKN2A and β-catenin of Salinomycin treated CD44+ cells. Moreover, Salinomycin significantly induced programmed cell death by inducing G2/M cell cycle arrest and inhibiting MAPK/PI3K pathways in this chemo-resistant population. Thus, this study demonstrated the potential of Salinomycin to target the chemo-resistant circulating CD44 population by attenuating its proliferation and survival.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Shanaya Patel
- Biological & Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, Gujarat, India
| | - Aditi Patel
- Biological & Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, Gujarat, India
| | - Aishwarya Nair
- Biological & Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, Gujarat, India
| | - Kavan Shah
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Kanisha Shah
- Department of Life Sciences, School of Sciences, Gujarat University, Ahmedabad, Gujarat, India
| | - Vivek Tanavde
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Rakesh Rawal
- Department of Life Sciences, School of Sciences, Gujarat University, Ahmedabad, Gujarat, India
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Patel A, Patel S, Patel P, Mandlik D, Patel K, Tanavde V. Salivary Exosomal miRNA-1307-5p Predicts Disease Aggressiveness and Poor Prognosis in Oral Squamous Cell Carcinoma Patients. Int J Mol Sci 2022; 23:ijms231810639. [PMID: 36142544 PMCID: PMC9505291 DOI: 10.3390/ijms231810639] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 07/28/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Salivary exosomal miRNAs as biomarkers facilitate repeated sampling, real-time disease monitoring and assessment of therapeutic response. This study identifies a single salivary exosomal miRNA prognosticator that will aid in improved patient outcome using a liquid biopsy approach. Method: Small RNA and transcriptome sequencing profiles of tumour tissues (n = 12) and salivary exosomes (n = 8) from oral cancer patients were compared to their non-cancerous counterparts. We validated these results using The Cancer Genome Atlas database and performing Real-time PCR on a large patient cohort (n = 19 tissue samples; n = 12 salivary exosomes). Potential target genes and the miRNA–mRNA networks and enriched biological pathways regulated by this microRNA were identified using computational tools. Results: Salivary exosomes (size: 30–50 nm) demonstrated a strong expression of CD47 and detectable expression of tetraspanins CD63, CD81 and CD9 by flow cytometry. miR-1307-5p was exclusively overexpressed in tissues and salivary exosomes of oral cancer patients compared to their non-cancerous counterparts. Enhanced expression of miR-1307-5p clinically correlated with poor patient survival, disease progression, aggressiveness and chemo-resistance. Transcriptome analysis suggested that miRNA-1307-5p could promote oral cancer progression by suppressing THOP1, EHF, RNF4, GET4 and RNF114. Conclusions: Salivary exosomal miRNA-1307-5p is a potential prognosticator for predicting poor survival and poor patient outcome in oral cancers.
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Affiliation(s)
- Aditi Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad 380009, India
| | - Shanaya Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad 380009, India
| | - Parina Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad 380009, India
| | - Dushyant Mandlik
- Department of Head and Neck Oncology, HCG Cancer Centre, Ahmedabad 380060, India
| | - Kaustubh Patel
- Department of Head and Neck Oncology, HCG Cancer Centre, Ahmedabad 380060, India
| | - Vivek Tanavde
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad 380009, India
- Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore 138671, Singapore
- Correspondence:
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Patel A, Patel S, Patel P, Tanavde V. Saliva Based Liquid Biopsies in Head and Neck Cancer: How Far Are We From the Clinic? Front Oncol 2022; 12:828434. [PMID: 35387114 PMCID: PMC8977527 DOI: 10.3389/fonc.2022.828434] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [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: 12/03/2021] [Accepted: 02/25/2022] [Indexed: 12/24/2022] Open
Abstract
Head and neck cancer (HNC) remains to be a major cause of mortality worldwide because of confounding factors such as late-stage tumor diagnosis, loco-regional aggressiveness and distant metastasis. The current standardized diagnostic regime for HNC is tissue biopsy which fails to determine the thorough tumor dynamics. Therefore, due to the ease of collection, recent studies have focused on the utility of saliva based liquid biopsy approach for serial sampling, early diagnosis, prognosis, longitudinal monitoring of disease progression and treatment response in HNC patients. Saliva collection is convenient, non-invasive, and pain-free and offers repetitive sampling along with real time monitoring of the disease. Moreover, the detection, isolation and analysis of tumor-derived components such as Circulating Tumor Nucleic Acids (CTNAs), Extracellular Vesicles (EVs), Circulating Tumor Cells (CTCs) and metabolites from saliva can be used for genomic and proteomic examination of HNC patients. Although, these circulatory biomarkers have a wide range of applications in clinical settings, no validated data has yet been established for their usage in clinical practice for HNC. Improvements in isolation and detection technologies and next-generation sequencing analysis have resolved many technological hurdles, allowing a wide range of saliva based liquid biopsy application in clinical backgrounds. Thus, in this review, we discussed the rationality of saliva as plausible biofluid and clinical sample for diagnosis, prognosis and therapeutics of HNC. We have described the molecular components of saliva that could mirror the disease status, recent outcomes of salivaomics associated with HNC and current technologies which have the potential to improve the clinical value of saliva in HNC.
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Affiliation(s)
- Aditi Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Shanaya Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Parina Patel
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
| | - Vivek Tanavde
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India.,Bioinformatics Institute, Agency for Science Technology and Research (ASTAR), Singapore, Singapore
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Fibi-Smetana S, Vaz C, Le Coz J, Ilic S, Berrios R, Schatzmayr G, Tanavde V, Grenier B. Research Note: Snapshot of the transcriptome via RNA sequencing in the ileum of broiler chickens fed subtherapeutic concentrations of avilamycin. Poult Sci 2020; 100:998-1003. [PMID: 33518154 PMCID: PMC7858091 DOI: 10.1016/j.psj.2020.11.012] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 11/05/2020] [Accepted: 11/09/2020] [Indexed: 11/25/2022] Open
Abstract
Antibiotics have played a critical role in sustaining and improving livestock production in the past decades, but the emergence of antimicrobial resistance has led several countries to ban or limit their use. Since then, in-feed alternatives have gained a lot of attention but the development of efficacious alternatives implies a better understanding of the mode of action of antibiotic growth promoters (AGP) when administered at subtherapeutic concentrations. In the present study, 120 broiler chickens per group (8 pens/group) were fed for 35 d with either basal feed (control group) or feed supplemented with avilamycin (AGP group; 10 g/1,000 kg of feed). At the end of the trial, the ileum from the small intestine of 5 birds per group was sampled, and RNA were isolated for profiling their transcriptome via RNA sequencing (RNA-Seq). As expected, the growth of chickens in the AGP group was significantly higher than in the control group. Overall, 66 differentially expressed genes (false discovery rate ≤ 0.05 and fold change ≥ 2 or ≤ −2) were found in the ileum of chickens fed avilamycin in comparison with the control group. The functional analysis showed reduced activity of genes related to signaling by interleukins, with IL-22, SOCS3, and certain antimicrobial peptides found multiple times in these pathways in the AGP group at day 35. In addition, higher activity was predicted in a module of genes related to lipid metabolism and transport in the avilamycin group. The use of RNA-Seq allowed a snapshot of the whole transcriptome at day 35 and aimed at delivering additional data on the host-centric hypothesis regarding the mode of action of AGP (i.e. immunomodulation, reduction of the immunological stress).
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Affiliation(s)
| | - Candida Vaz
- Bioinformatics Institute, Agency for Science Technology and Research (A∗STAR), Singapore 138671
| | - Jeremy Le Coz
- BIOMIN Research Center, BIOMIN Holding GmbH, 3430 Tulln, Austria
| | - Suzana Ilic
- BIOMIN Research Center, BIOMIN Holding GmbH, 3430 Tulln, Austria
| | - Roger Berrios
- BIOMIN Holding GmbH, Erber Campus 1, 3131 Getzersdorf, Austria
| | - Gerd Schatzmayr
- BIOMIN Research Center, BIOMIN Holding GmbH, 3430 Tulln, Austria
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science Technology and Research (A∗STAR), Singapore 138671
| | - Bertrand Grenier
- BIOMIN Research Center, BIOMIN Holding GmbH, 3430 Tulln, Austria.
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Kolarich A, Tanavde V, Solomon A, Georgiades C, Hong K. Abstract No. 546 Portal vein embolization with and without locoregional therapy and post-hepatectomy complication risk: a National Surgery Quality Improvement Program analysis. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.607] [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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Louis JM, Vaz C, Balaji A, Tanavde V, Talukdar I. TNF-alpha regulates alternative splicing of genes participating in pathways of crucial metabolic syndromes; a transcriptome wide study. Cytokine 2020; 125:154815. [DOI: 10.1016/j.cyto.2019.154815] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/12/2019] [Accepted: 08/19/2019] [Indexed: 12/27/2022]
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Ho BSY, Vaz C, Ramasamy S, Chew EGY, Mohamed JS, Jaffar H, Hillmer A, Tanavde V, Bigliardi-Qi M, Bigliardi PL. Progressive expression of PPARGC1α is associated with hair miniaturization in androgenetic alopecia. Sci Rep 2019; 9:8771. [PMID: 31217429 PMCID: PMC6584672 DOI: 10.1038/s41598-019-43998-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 04/17/2019] [Indexed: 12/19/2022] Open
Abstract
Current opinion views androgens as the pathogenic driver in the miniaturization of hair follicles of androgenetic alopecia by interfering with the dermal papilla. This cannot be the sole cause and therefore it is important for therapeutic and diagnostic purposes to identify additional pathways. Comparative full transcriptome profile analysis of the hair bulb region of normal and miniaturized hair follicles from vertex and occipital region in males with and without androgenetic alopecia revealed that next to the androgen receptor as well the retinoid receptor and particularly the PPAR pathway is involved in progressive hair miniaturization. We demonstrate the concurrent up-regulation of PPARGC1a in the epithelial compartment and androgen receptor in the dermal papilla of miniaturized hair. Dynamic Ppargc1a expression in the mouse hair cycle suggests a possible role in regulating hair growth and differentiation. This is supported by reduced proliferation of human dermal papilla and predominantly epithelial keratinocytes after incubation with AICAR, the agonist for AMPK signaling which activates PPARGC1a and serves as co-activator of PPARγ. In addition, miRNA profiling shows enrichment of miRNA-targeted genes in retinoid receptors and PPARGC1α/PPARγ signaling, and antigen presentation pathways.
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Affiliation(s)
- Bryan Siu-Yin Ho
- Experimental Dermatology Group, Institute of Medical Biology, A*STAR (Agency for Science, Technology and Research), Singapore, 138648, Singapore
| | - Candida Vaz
- Bioinformatics Institute, A*STAR (Agency for Science, Technology and Research), Singapore, 138671, Singapore
| | - Srinivas Ramasamy
- Experimental Dermatology Group, Institute of Medical Biology, A*STAR (Agency for Science, Technology and Research), Singapore, 138648, Singapore
| | - Elaine Guo Yan Chew
- Cancer Therapeutics and Stratified Oncology, Genome Institute of Singapore, A*STAR (Agency for Science, Technology and Research), Singapore, 138672, Singapore
| | - Jameelah Sheik Mohamed
- Experimental Dermatology Group, Institute of Medical Biology, A*STAR (Agency for Science, Technology and Research), Singapore, 138648, Singapore
| | - Huma Jaffar
- National University of Singapore, YLL School of Medicine, Singapore, 119074, Singapore
| | - Axel Hillmer
- Cancer Therapeutics and Stratified Oncology, Genome Institute of Singapore, A*STAR (Agency for Science, Technology and Research), Singapore, 138672, Singapore.,Institute of Pathology, University Hospital Cologne, Kerpener Str. 62, 50937, Köln, Germany
| | - Vivek Tanavde
- Bioinformatics Institute, A*STAR (Agency for Science, Technology and Research), Singapore, 138671, Singapore.,Division of Biological & Life Sciences, School of Arts and Sciences, Ahmedabad, India
| | - Mei Bigliardi-Qi
- Experimental Dermatology Group, Institute of Medical Biology, A*STAR (Agency for Science, Technology and Research), Singapore, 138648, Singapore.,Department of Dermatology, University of Minnesota, 516 Delaware Street S.E., Mail Code 98 Phillips-Wangensteen Bldg., Suite 4-240, Minneapolis, Minnesota, 55455, USA
| | - Paul Lorenz Bigliardi
- Experimental Dermatology Group, Institute of Medical Biology, A*STAR (Agency for Science, Technology and Research), Singapore, 138648, Singapore. .,Department of Dermatology, University of Minnesota, 516 Delaware Street S.E., Mail Code 98 Phillips-Wangensteen Bldg., Suite 4-240, Minneapolis, Minnesota, 55455, USA.
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Nguyen MN, Sen N, Lin M, Joseph TL, Vaz C, Tanavde V, Way L, Hupp T, Verma CS, Madhusudhan MS. Discovering Putative Protein Targets of Small Molecules: A Study of the p53 Activator Nutlin. J Chem Inf Model 2019; 59:1529-1546. [DOI: 10.1021/acs.jcim.8b00762] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Minh N. Nguyen
- Bioinformatics Institute, 30 Biopolis Street, #07-01, Matrix, Singapore 138671
| | - Neeladri Sen
- Indian Institute of Science Education and Research Pune (IISER Pune), Pune 411008, India
| | - Meiyin Lin
- Hwa Chong Institution, 661 Bukit Timah Road, Singapore 269734
| | | | - Candida Vaz
- Bioinformatics Institute, 30 Biopolis Street, #07-01, Matrix, Singapore 138671
| | - Vivek Tanavde
- Bioinformatics Institute, 30 Biopolis Street, #07-01, Matrix, Singapore 138671
| | - Luke Way
- University of Edinburgh, Edinburgh Cancer Research Centre, Edinburgh, U.K. EH4 2XR
| | - Ted Hupp
- University of Edinburgh, Edinburgh Cancer Research Centre, Edinburgh, U.K. EH4 2XR
| | - Chandra S. Verma
- Bioinformatics Institute, 30 Biopolis Street, #07-01, Matrix, Singapore 138671
- Department of Biological Sciences, 16 Science Drive 4, National University of Singapore, Singapore 117558
- School of Biological Sciences, 60 Nanyang Drive, Nanyang Technological University, Singapore 637551
| | - M. S. Madhusudhan
- Indian Institute of Science Education and Research Pune (IISER Pune), Pune 411008, India
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13
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Mishra A, Sriram H, Chandarana P, Tanavde V, Kumar RV, Gopinath A, Govindarajan R, Ramaswamy S, Sadasivam S. Decreased expression of cell adhesion genes in cancer stem-like cells isolated from primary oral squamous cell carcinomas. Tumour Biol 2018; 40:1010428318780859. [PMID: 29888653 DOI: 10.1177/1010428318780859] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 02/06/2023] Open
Abstract
The goal of this study was to isolate cancer stem-like cells marked by high expression of CD44, a putative cancer stem cell marker, from primary oral squamous cell carcinomas and identify distinctive gene expression patterns in these cells. From 1 October 2013 to 4 September 2015, 76 stage III-IV primary oral squamous cell carcinoma of the gingivobuccal sulcus were resected. In all, 13 tumours were analysed by immunohistochemistry to visualise CD44-expressing cells. Expression of CD44 within The Cancer Genome Atlas-Head and Neck Squamous Cell Carcinoma RNA-sequencing data was also assessed. Seventy resected tumours were dissociated into single cells and stained with antibodies to CD44 as well as CD45 and CD31 (together referred as Lineage/Lin). From 45 of these, CD44+Lin- and CD44-Lin- subpopulations were successfully isolated using fluorescence-activated cell sorting, and good-quality RNA was obtained from 14 such sorted pairs. Libraries from five pairs were sequenced and the results analysed using bioinformatics tools. Reverse transcription quantitative polymerase chain reaction was performed to experimentally validate the differential expression of selected candidate genes identified from the transcriptome sequencing in the same 5 and an additional 9 tumours. CD44 was expressed on the surface of poorly differentiated tumour cells, and within the The Cancer Genome Atlas-Head and Neck Squamous Cell Carcinoma samples, its messenger RNA levels were higher in tumours compared to normal. Transcriptomics revealed that 102 genes were upregulated and 85 genes were downregulated in CD44+Lin- compared to CD44-Lin- cells in at least 3 of the 5 tumours sequenced. The upregulated genes included those involved in immune regulation, while the downregulated genes were enriched for genes involved in cell adhesion. Decreased expression of PCDH18, MGP, SPARCL1 and KRTDAP was confirmed by reverse transcription quantitative polymerase chain reaction. Lower expression of the cell-cell adhesion molecule PCDH18 correlated with poorer overall survival in the The Cancer Genome Atlas-Head and Neck Squamous Cell Carcinoma data highlighting it as a potential negative prognostic factor in this cancer.
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Affiliation(s)
- Amrendra Mishra
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
- 2 Hannover Biomedical Research School, Hannover Medical School, Hannover, Germany
| | - Harshini Sriram
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
| | | | - Vivek Tanavde
- 3 iBioAnalysis Pvt. Ltd., Ahmedabad, India
- 4 Division of Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, India
- 5 Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore
| | - Rekha V Kumar
- 6 Kidwai Memorial Institute of Oncology, Bengaluru, India
| | | | | | - S Ramaswamy
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
| | - Subhashini Sadasivam
- 1 Institute for Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, UAS-GKVK Campus, Bengaluru, India
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14
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Pursani V, Bhartiya D, Tanavde V, Bashir M, Sampath P. Transcriptional activator DOT1L putatively regulates human embryonic stem cell differentiation into the cardiac lineage. Stem Cell Res Ther 2018; 9:97. [PMID: 29631608 PMCID: PMC5891944 DOI: 10.1186/s13287-018-0810-8] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 02/12/2018] [Accepted: 02/20/2018] [Indexed: 01/09/2023] Open
Abstract
Background Commitment of pluripotent stem cells into differentiated cells and associated gene expression necessitate specific epigenetic mechanisms that modify the DNA and corresponding histone proteins to render the chromatin in an open or closed state. This in turn dictates the associated genetic machinery, including transcription factors, acknowledging the cellular signals provided. Activating histone methyltransferases represent crucial enzymes in the epigenetic machinery that cause transcription initiation by delivering the methyl mark on histone proteins. A number of studies have evidenced the vital role of one such histone modifier, DOT1L, in transcriptional regulation. Involvement of DOT1L in differentiating pluripotent human embryonic stem (hES) cells into the cardiac lineage has not yet been investigated. Methods The study was conducted on in-house derived (KIND1) and commercially available (HES3) human embryonic stem cell lines. Chromatin immunoprecipitation (ChIP) was performed followed by sequencing to uncover the cardiac genes harboring the DOT1L specific mark H3K79me2. Following this, dual immunofluorescence was employed to show the DOT1L co-occupancy along with the cardiac progenitor specific marker. DOT1L was knocked down by siRNA to further confirm its role during cardiac differentiation. Results ChIP sequencing revealed a significant number of peaks characterizing H3K79me2 occupancy in the proximity of the transcription start site. This included genes like MYOF, NR2F2, NKX2.5, and HAND1 in cardiac progenitors and cardiomyocytes, and POU5F1 and NANOG in pluripotent hES cells. Consistent with this observation, we also show that DOT1L co-localizes with the master cardiac transcription factor NKX2.5, suggesting its direct involvement during gene activation. Knockdown of DOT1L did not alter the pluripotency of hES cells, but it led to the disruption of cardiac differentiation observed morphologically as well as at transcript and protein levels. Conclusions Collectively, our data suggests the crucial role of H3K79me2 methyltransferase DOT1L for activation of NKX2.5 during the cardiac differentiation of hES cells. Electronic supplementary material The online version of this article (10.1186/s13287-018-0810-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Varsha Pursani
- Stem Cell Biology Department, ICMR-National Institute for Research in Reproductive Health, J.M. Street, Parel, Mumbai, Maharashtra, 400 012, India
| | - Deepa Bhartiya
- Stem Cell Biology Department, ICMR-National Institute for Research in Reproductive Health, J.M. Street, Parel, Mumbai, Maharashtra, 400 012, India.
| | - Vivek Tanavde
- Division of Biological & Life Sciences, School of Arts & Sciences, Ahmedabad University, Ahmedabad, 380009, India.,Genome and Gene Expression Data Analysis Division, A* Star-Bioinformatics Institute, Singapore, 138671, Singapore
| | - Mohsin Bashir
- Division of Translational Control of Disease, A* Star-Institute of Medical Biology, Singapore, 138648, Singapore
| | - Prabha Sampath
- Division of Translational Control of Disease, A* Star-Institute of Medical Biology, Singapore, 138648, Singapore
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15
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Guo J, Lin F, Zhang X, Tanavde V, Zheng J. NetLand: quantitative modeling and visualization of Waddington's epigenetic landscape using probabilistic potential. Bioinformatics 2018; 33:1583-1585. [PMID: 28108450 PMCID: PMC5423452 DOI: 10.1093/bioinformatics/btx022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 01/18/2017] [Indexed: 11/16/2022] Open
Abstract
Summary Waddington’s epigenetic landscape is a powerful metaphor for cellular dynamics driven by gene regulatory networks (GRNs). Its quantitative modeling and visualization, however, remains a challenge, especially when there are more than two genes in the network. A software tool for Waddington’s landscape has not been available in the literature. We present NetLand, an open-source software tool for modeling and simulating the kinetic dynamics of GRNs, and visualizing the corresponding Waddington’s epigenetic landscape in three dimensions without restriction on the number of genes in a GRN. With an interactive and graphical user interface, NetLand can facilitate the knowledge discovery and experimental design in the study of cell fate regulation (e.g. stem cell differentiation and reprogramming). Availability and Implementation NetLand can run under operating systems including Windows, Linux and OS X. The executive files and source code of NetLand as well as a user manual, example models etc. can be downloaded from http://netland-ntu.github.io/NetLand/. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Jing Guo
- Biomedical Informatics Lab, School of Computer Science and Engineering, Nanyang Technological University, Singapore, Singapore.,Bioinformatics Institute, Agency for Science, Technology, and Research (A*STAR), Singapore, Singapore
| | - Feng Lin
- Biomedical Informatics Lab, School of Computer Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Xiaomeng Zhang
- Biomedical Informatics Lab, School of Computer Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science, Technology, and Research (A*STAR), Singapore, Singapore
| | - Jie Zheng
- Biomedical Informatics Lab, School of Computer Science and Engineering, Nanyang Technological University, Singapore, Singapore.,Genome Institute of Singapore, A*STAR, Singapore, Singapore.,Complexity Institute, Nanyang Technological University, Singapore, Singapore
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16
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Winata CL, Łapiński M, Pryszcz L, Vaz C, Bin Ismail MH, Nama S, Hajan HS, Lee SGP, Korzh V, Sampath P, Tanavde V, Mathavan S. Cytoplasmic polyadenylation-mediated translational control of maternal mRNAs directs maternal-to-zygotic transition. Development 2018; 145:dev.159566. [PMID: 29229769 DOI: 10.1242/dev.159566] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 11/20/2017] [Indexed: 10/18/2022]
Abstract
In the earliest stages of animal development following fertilization, maternally deposited mRNAs direct biological processes to the point of zygotic genome activation (ZGA). These maternal mRNAs undergo cytoplasmic polyadenylation (CPA), suggesting translational control of their activation. To elucidate the biological role of CPA during embryogenesis, we performed genome-wide polysome profiling at several stages of zebrafish development. Our analysis revealed a correlation between CPA and polysome-association dynamics, demonstrating a coupling of translation to the CPA of maternal mRNAs. Pan-embryonic CPA inhibition disrupted the maternal-to-zygotic transition (MZT), causing a failure of developmental progression beyond the mid-blastula transition and changes in global gene expression that indicated a failure of ZGA and maternal mRNA clearance. Among the genes that were differentially expressed were those encoding chromatin modifiers and key transcription factors involved in ZGA, including nanog, pou5f3 and sox19b, which have distinct CPA dynamics. Our results establish the necessity of CPA for ensuring progression of the MZT. The RNA-seq data generated in this study represent a valuable zebrafish resource for the discovery of novel elements of the early embryonic transcriptome.
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Affiliation(s)
- Cecilia Lanny Winata
- International Institute of Molecular and Cell Biology in Warsaw, 02-109 Warsaw, Poland .,Max-Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Maciej Łapiński
- International Institute of Molecular and Cell Biology in Warsaw, 02-109 Warsaw, Poland
| | - Leszek Pryszcz
- International Institute of Molecular and Cell Biology in Warsaw, 02-109 Warsaw, Poland
| | - Candida Vaz
- Bioinformatics Institute, Agency for Science Technology and Research, 138671 Singapore
| | | | - Srikanth Nama
- Institute of Medical Biology, Agency of Science Technology and Research, 138648 Singapore
| | - Hajira Shreen Hajan
- Genome Institute of Singapore, Agency of Science Technology and Research, 138672 Singapore
| | - Serene Gek Ping Lee
- Genome Institute of Singapore, Agency of Science Technology and Research, 138672 Singapore
| | - Vladimir Korzh
- International Institute of Molecular and Cell Biology in Warsaw, 02-109 Warsaw, Poland.,Institute of Molecular and Cell Biology, Agency of Science Technology and Research, 138673 Singapore
| | - Prabha Sampath
- Institute of Medical Biology, Agency of Science Technology and Research, 138648 Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, 117596 Singapore.,Program in Cancer and Stem Cell Biology, Duke-NUS Medical School, 169857 Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science Technology and Research, 138671 Singapore.,Institute of Medical Biology, Agency of Science Technology and Research, 138648 Singapore
| | - Sinnakaruppan Mathavan
- Genome Institute of Singapore, Agency of Science Technology and Research, 138672 Singapore .,Vision Research Foundation, Sankara Nethralaya, 600 006 Chennai, India
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17
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Pursani V, Pethe P, Bashir M, Sampath P, Tanavde V, Bhartiya D. Genetic and Epigenetic Profiling Reveals EZH2-mediated Down Regulation of OCT-4 Involves NR2F2 during Cardiac Differentiation of Human Embryonic Stem Cells. Sci Rep 2017; 7:13051. [PMID: 29026152 PMCID: PMC5638931 DOI: 10.1038/s41598-017-13442-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 04/12/2017] [Accepted: 09/25/2017] [Indexed: 02/07/2023] Open
Abstract
Human embryonic (hES) stem cells are widely used as an in vitro model to understand global genetic and epigenetic changes that occur during early embryonic development. In-house derived hES cells (KIND1) were subjected to directed differentiation into cardiovascular progenitors (D12) and beating cardiomyocytes (D20). Transcriptome profiling of undifferentiated (D0) and differentiated (D12 and 20) cells was undertaken by microarray analysis. ChIP and sequential ChIP were employed to study role of transcription factor NR2F2 during hES cells differentiation. Microarray profiling showed that an alteration of about 1400 and 1900 transcripts occurred on D12 and D20 respectively compared to D0 whereas only 19 genes were altered between D12 and D20. This was found associated with corresponding expression pattern of chromatin remodelers, histone modifiers, miRNAs and lncRNAs marking the formation of progenitors and cardiomyocytes on D12 and D20 respectively. ChIP sequencing and sequential ChIP revealed the binding of NR2F2 with polycomb group member EZH2 and pluripotent factor OCT4 indicating its crucial involvement in cardiac differentiation. The study provides a detailed insight into genetic and epigenetic changes associated with hES cells differentiation into cardiac cells and a role for NR2F2 is deciphered for the first time to down-regulate OCT-4 via EZH2 during cardiac differentiation.
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Affiliation(s)
- Varsha Pursani
- Stem Cell Biology Department, ICMR- National Institute for Research in Reproductive Health, Mumbai, 400012, India
| | - Prasad Pethe
- Stem Cell Biology Department, ICMR- National Institute for Research in Reproductive Health, Mumbai, 400012, India
- Department of Biological Sciences, Sunandan Divatia School of Science, NMIMS University, Mumbai, 400056, India
| | - Mohsin Bashir
- Institute of Medical Biology, Agency for Science Technology & Research (A*STAR), Singapore, 138648, Singapore
| | - Prabha Sampath
- Institute of Medical Biology, Agency for Science Technology & Research (A*STAR), Singapore, 138648, Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science Technology & Research (A*STAR), Singapore, 138671, Singapore
- Division of Biological & Life Sciences, School of Arts & Sciences, Ahmedabad University, Ahmedabad, 380009, India
| | - Deepa Bhartiya
- Stem Cell Biology Department, ICMR- National Institute for Research in Reproductive Health, Mumbai, 400012, India.
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18
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Sundaram GM, Ismail HM, Bashir M, Muhuri M, Vaz C, Nama S, Ow GS, Vladimirovna IA, Ramalingam R, Burke B, Tanavde V, Kuznetsov V, Lane EB, Sampath P. EGF hijacks miR-198/FSTL1 wound-healing switch and steers a two-pronged pathway toward metastasis. J Exp Med 2017; 214:2889-2900. [PMID: 28827448 PMCID: PMC5626400 DOI: 10.1084/jem.20170354] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 05/31/2017] [Accepted: 07/12/2017] [Indexed: 12/26/2022] Open
Abstract
Exploring the parallels between wound healing and epithelial cancers, Sundaram et al. elucidate the mechanism by which cancer cells hijack the wound healing switch to enhance invasion and metastasis in head and neck squamous cell carcinoma. Epithelial carcinomas are well known to activate a prolonged wound-healing program that promotes malignant transformation. Wound closure requires the activation of keratinocyte migration via a dual-state molecular switch. This switch involves production of either the anti-migratory microRNA miR-198 or the pro-migratory follistatin-like 1 (FSTL1) protein from a single transcript; miR-198 expression in healthy skin is down-regulated in favor of FSTL1 upon wounding, which enhances keratinocyte migration and promotes re-epithelialization. Here, we reveal a defective molecular switch in head and neck squamous cell carcinoma (HNSCC). This defect shuts off miR-198 expression in favor of sustained FSTL1 translation, driving metastasis through dual parallel pathways involving DIAPH1 and FSTL1. DIAPH1, a miR-198 target, enhances directional migration through sequestration of Arpin, a competitive inhibitor of Arp2/3 complex. FSTL1 blocks Wnt7a-mediated repression of extracellular signal–regulated kinase phosphorylation, enabling production of MMP9, which degrades the extracellular matrix and facilitates metastasis. The prognostic significance of the FSTL1-DIAPH1 gene pair makes it an attractive target for therapeutic intervention.
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Affiliation(s)
- Gopinath M Sundaram
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Hisyam M Ismail
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Mohsin Bashir
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Manish Muhuri
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Candida Vaz
- Bioinformatics Institute, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Srikanth Nama
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Ghim Siong Ow
- Bioinformatics Institute, Agency for Science, Technology, and Research (A*STAR), Singapore
| | | | - Rajkumar Ramalingam
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Brian Burke
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Vladimir Kuznetsov
- Bioinformatics Institute, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - E Birgitte Lane
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore
| | - Prabha Sampath
- Institute of Medical Biology, Agency for Science, Technology, and Research (A*STAR), Singapore .,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Program in Cancer and Stem Cell Biology, Duke-National University of Singapore Medical School, Singapore
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19
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Taye B, Vaz C, Tanavde V, Kuznetsov VA, Eisenhaber F, Sugrue RJ, Maurer-Stroh S. Benchmarking selected computational gene network growing tools in context of virus-host interactions. Sci Rep 2017; 7:5805. [PMID: 28724991 PMCID: PMC5517527 DOI: 10.1038/s41598-017-06020-6] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 06/07/2017] [Indexed: 01/04/2023] Open
Abstract
Several available online tools provide network growing functions where an algorithm utilizing different data sources suggests additional genes/proteins that should connect an input gene set into functionally meaningful networks. Using the well-studied system of influenza host interactions, we compare the network growing function of two free tools GeneMANIA and STRING and the commercial IPA for their performance of recovering known influenza A virus host factors previously identified from siRNA screens. The result showed that given small (~30 genes) or medium (~150 genes) input sets all three network growing tools detect significantly more known host factors than random human genes with STRING overall performing strongest. Extending the networks with all the three tools significantly improved the detection of GO biological processes of known host factors compared to not growing networks. Interestingly, the rate of identification of true host factors using computational network growing is equal or better to doing another experimental siRNA screening study which could also be true and applied to other biological pathways/processes.
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Affiliation(s)
- Biruhalem Taye
- Bioinformatics Institute, A*STAR, 30 Biopolis Street #07-01 Matrix, Singapore, 138671, Singapore. .,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore. .,Aklilu Lemma Institute of Pathobiology, Addis Ababa University, P.O.BOX 1176, Addis Ababa, Ethiopia.
| | - Candida Vaz
- Bioinformatics Institute, A*STAR, 30 Biopolis Street #07-01 Matrix, Singapore, 138671, Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, A*STAR, 30 Biopolis Street #07-01 Matrix, Singapore, 138671, Singapore.,Institute of Medical Biology, A*STAR, 8A Biomedical Grove, #06-06 Immunos, Singapore, 138648, Singapore
| | - Vladimir A Kuznetsov
- Bioinformatics Institute, A*STAR, 30 Biopolis Street #07-01 Matrix, Singapore, 138671, Singapore.,School of Computer Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Frank Eisenhaber
- Bioinformatics Institute, A*STAR, 30 Biopolis Street #07-01 Matrix, Singapore, 138671, Singapore.,Department of Biological Sciences, National University of Singapore, 8 Medical Drive, Singapore, 117597, Singapore.,School of Computer Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Richard J Sugrue
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Sebastian Maurer-Stroh
- Bioinformatics Institute, A*STAR, 30 Biopolis Street #07-01 Matrix, Singapore, 138671, Singapore.,Department of Biological Sciences, National University of Singapore, 8 Medical Drive, Singapore, 117597, Singapore.,National Public Health Laboratory, Ministry of Health, 3 Biopolis Drive, Synapse #05-14/16, Singapore, 138623, Singapore
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20
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Guneta V, Tan NS, Chan SKJ, Tanavde V, Lim TC, Wong TCM, Choong C. Comparative study of adipose-derived stem cells and bone marrow-derived stem cells in similar microenvironmental conditions. Exp Cell Res 2016; 348:155-164. [PMID: 27658569 DOI: 10.1016/j.yexcr.2016.09.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 08/20/2016] [Accepted: 09/18/2016] [Indexed: 12/15/2022]
Abstract
Mesenchymal stem cells (MSCs), which were first isolated from the bone marrow, are now being extracted from various other tissues in the body, including the adipose tissue. The current study presents systematic evidence of how the adipose tissue-derived stem cells (ASCs) and bone marrow-derived mesenchymal stem cells (Bm-MSCs) behave when cultured in specific pro-adipogenic microenvironments. The cells were first characterized and identified as MSCs in terms of their morphology, phenotypic expression, self-renewal capabilities and multi-lineage potential. Subsequently, the proliferation and gene expression profiles of the cell populations cultured on two-dimensional (2D) adipose tissue extracellular matrix (ECM)-coated tissue culture plastic (TCP) and in three-dimensional (3D) AlgiMatrix® microenvironments were analyzed. Overall, it was found that adipogenesis was triggered in both cell populations due to the presence of adipose tissue ECM. However, in 3D microenvironments, ASCs and Bm-MSCs were predisposed to the adipogenic and osteogenic lineages respectively. Overall, findings from this study will contribute to ongoing efforts in adipose tissue engineering as well as provide new insights into the role of the ECM and cues provided by the immediate microenvironment for stem cell differentiation.
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Affiliation(s)
- Vipra Guneta
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Nguan Soon Tan
- School of Biological Science, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore; KK Research Centre, KK Women's and Children Hospital, 100 Bukit Timah Road, Singapore 229899, Singapore; Institute of Molecular and Cell Biology, Agency for Science Technology & Research (A⁎STAR), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore
| | - Soon Kiat Jeremy Chan
- School of Biological Science, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science Technology & Research (A⁎STAR), 30 Biopolis Street, Matrix, Singapore 138671, Singapore
| | - Thiam Chye Lim
- Division of Plastic, Reconstructive and Aesthetic Surgery, Department of Surgery, National University Hospital (NUH) and National University of Singapore (NUS), Kent Ridge Wing, Singapore 119074, Singapore
| | - Thien Chong Marcus Wong
- Plastic, Reconstructive and Aesthetic Surgery Section, Tan Tock Seng Hospital (TTSH), 11, Jalan Tan Tock Seng, Singapore 308433, Singapore
| | - Cleo Choong
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; KK Research Centre, KK Women's and Children Hospital, 100 Bukit Timah Road, Singapore 229899, Singapore.
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21
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Takeda K, Sriram S, Chan XHD, Ong WK, Yeo CR, Tan B, Lee SA, Kong KV, Hoon S, Jiang H, Yuen JJ, Perumal J, Agrawal M, Vaz C, So J, Shabbir A, Blaner WS, Olivo M, Han W, Tanavde V, Toh SA, Sugii S. Erratum. Retinoic Acid Mediates Visceral-Specific Adipogenic Defects of Human Adipose-Derived Stem Cells. Diabetes 2016;65:1164-1178. Diabetes 2016; 65:2816. [PMID: 27555576 PMCID: PMC5384654 DOI: 10.2337/db16-er09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Takeda K, Sriram S, Chan XHD, Ong WK, Yeo CR, Tan B, Lee SA, Kong KV, Hoon S, Jiang H, Yuen JJ, Perumal J, Agrawal M, Vaz C, So J, Shabbir A, Blaner WS, Olivo M, Han W, Tanavde V, Toh SA, Sugii S. Retinoic Acid Mediates Visceral-Specific Adipogenic Defects of Human Adipose-Derived Stem Cells. Diabetes 2016; 65:1164-78. [PMID: 26936961 PMCID: PMC5384626 DOI: 10.2337/db15-1315] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 02/20/2016] [Indexed: 12/20/2022]
Abstract
Increased visceral fat, rather than subcutaneous fat, during the onset of obesity is associated with a higher risk of developing metabolic diseases. The inherent adipogenic properties of human adipose-derived stem cells (ASCs) from visceral depots are compromised compared with those of ASCs from subcutaneous depots, but little is known about the underlying mechanisms. Using ontological analysis of global gene expression studies, we demonstrate that many genes involved in retinoic acid (RA) synthesis or regulated by RA are differentially expressed in human tissues and ASCs from subcutaneous and visceral fat. The endogenous level of RA is higher in visceral ASCs; this is associated with upregulation of the RA synthesis gene through the visceral-specific developmental factor WT1. Excessive RA-mediated activity impedes the adipogenic capability of ASCs at early but not late stages of adipogenesis, which can be reversed by antagonism of RA receptors or knockdown of WT1. Our results reveal the developmental origin of adipocytic properties and the pathophysiological contributions of visceral fat depots.
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MESH Headings
- Active Transport, Cell Nucleus/drug effects
- Adipogenesis/drug effects
- Adult Stem Cells/cytology
- Adult Stem Cells/drug effects
- Adult Stem Cells/metabolism
- Adult Stem Cells/pathology
- Bariatric Surgery
- Benzoates/pharmacology
- Cells, Cultured
- Down-Regulation/drug effects
- Gene Expression Profiling
- Gene Expression Regulation, Developmental/drug effects
- Gene Ontology
- Humans
- Intra-Abdominal Fat/cytology
- Intra-Abdominal Fat/drug effects
- Intra-Abdominal Fat/metabolism
- Intra-Abdominal Fat/pathology
- Middle Aged
- Naphthalenes/pharmacology
- Obesity, Morbid/metabolism
- Obesity, Morbid/pathology
- Obesity, Morbid/surgery
- RNA Interference
- Receptors, Retinoic Acid/agonists
- Receptors, Retinoic Acid/antagonists & inhibitors
- Receptors, Retinoic Acid/metabolism
- Response Elements/drug effects
- Signal Transduction/drug effects
- Stilbenes/pharmacology
- Subcutaneous Fat, Abdominal/cytology
- Subcutaneous Fat, Abdominal/drug effects
- Subcutaneous Fat, Abdominal/metabolism
- Subcutaneous Fat, Abdominal/pathology
- Tretinoin/metabolism
- Up-Regulation/drug effects
- WT1 Proteins/antagonists & inhibitors
- WT1 Proteins/genetics
- WT1 Proteins/metabolism
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Affiliation(s)
- Kosuke Takeda
- Fat Metabolism and Stem Cell Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Sandhya Sriram
- Fat Metabolism and Stem Cell Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Xin Hui Derryn Chan
- Fat Metabolism and Stem Cell Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Wee Kiat Ong
- Fat Metabolism and Stem Cell Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Chia Rou Yeo
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Betty Tan
- Bioinformatics Institute, A*STAR, Singapore
| | - Seung-Ah Lee
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Kien Voon Kong
- Bio-optical Imaging Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Shawn Hoon
- Molecular Engineering Lab, A*STAR, Singapore
| | - Hongfeng Jiang
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Jason J Yuen
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Jayakumar Perumal
- Bio-optical Imaging Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Madhur Agrawal
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | | | - Jimmy So
- Department of Surgery, National University Hospital, Singapore
| | - Asim Shabbir
- Department of Surgery, National University Hospital, Singapore
| | - William S Blaner
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY
| | - Malini Olivo
- Bio-optical Imaging Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Weiping Han
- Cardiovascular and Metabolic Disorders Program, Duke-National University of Singapore Medical School, Singapore Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, A*STAR, Singapore Institute of Medical Biology, A*STAR, Singapore
| | - Sue-Anne Toh
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Shigeki Sugii
- Fat Metabolism and Stem Cell Group, Laboratory of Metabolic Medicine, Singapore Bioimaging Consortium, A*STAR, Singapore Cardiovascular and Metabolic Disorders Program, Duke-National University of Singapore Medical School, Singapore
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23
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Tanavde V, Vaz C, Rao MS, Vemuri MC, Pochampally RR. Research using Mesenchymal Stem/Stromal Cells: quality metric towards developing a reference material. Cytotherapy 2016; 17:1169-77. [PMID: 26276001 DOI: 10.1016/j.jcyt.2015.07.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/25/2015] [Accepted: 07/09/2015] [Indexed: 02/07/2023]
Abstract
Mesenchymal stem/stromal cells (MSCs) have been extensively investigated for their regenerative, immune-modulatory, and wound healing properties. While the laboratory studies have suggested that MSC's have a unique potential for modulating the etiopathology of multiple diseases, the results from clinical trials have not been encouraging or reproducible. One of the explanations for such variability is explained by the "art" of isolating and propagating MSCs. Therefore, establishing more than minimal criteria to define MSC would help understand best protocols to isolate, propagate and deliver MSCs. Developing a calibration standard, a database and a set of functional tests would be a better quality metric for MSCs. In this review, we discuss the importance of selecting a standard, issues associated with coming up with such a standard and how these issues can be mitigated.
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Affiliation(s)
- Vivek Tanavde
- Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore 138671; Institute for Medical Biology, A∗STAR, Singapore 138648
| | - Candida Vaz
- Bioinformatics Institute, Agency for Science Technology and Research (A*STAR), Singapore 138671
| | - Mahendra S Rao
- Q Thera, NYSCF, Regenerative Medicine, NYSTEM, Albany, NY
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24
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Wong QWL, Vaz C, Lee QY, Zhao TY, Luo R, Archer SK, Preiss T, Tanavde V, Vardy LA. Embryonic Stem Cells Exhibit mRNA Isoform Specific Translational Regulation. PLoS One 2016; 11:e0143235. [PMID: 26799392 PMCID: PMC4723142 DOI: 10.1371/journal.pone.0143235] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 06/04/2015] [Accepted: 11/02/2015] [Indexed: 01/08/2023] Open
Abstract
The presence of multiple variants for many mRNAs is a major contributor to protein diversity. The processing of these variants is tightly controlled in a cell-type specific manner and has a significant impact on gene expression control. Here we investigate the differential translation rates of individual mRNA variants in embryonic stem cells (ESCs) and in ESC derived Neural Precursor Cells (NPCs) using polysome profiling coupled to RNA sequencing. We show that there are a significant number of detectable mRNA variants in ESCs and NPCs and that many of them show variant specific translation rates. This is correlated with differences in the UTRs of the variants with the 5'UTR playing a predominant role. We suggest that mRNA variants that contain alternate UTRs are under different post-transcriptional controls. This is likely due to the presence or absence of miRNA and protein binding sites that regulate translation rate. This highlights the importance of addressing translation rate when using mRNA levels as a read out of protein abundance. Additional analysis shows that many annotated non-coding mRNAs are present on the polysome fractions in ESCs and NPCs. We believe that the use of polysome fractionation coupled to RNA sequencing is a useful method for analysis of the translation state of many different RNAs in the cell.
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Affiliation(s)
- Queenie Wing-Lei Wong
- Institute of Medical Biology, A*STAR, 8A Biomedical Grove, Immunos, 138648, Singapore, Singapore
| | - Candida Vaz
- Bioinformatics Institute, A*STAR, 30 Biopolis Street, 138671, Singapore, Singapore
| | - Qian Yi Lee
- Bioinformatics Institute, A*STAR, 30 Biopolis Street, 138671, Singapore, Singapore
| | - Tian Yun Zhao
- Institute of Medical Biology, A*STAR, 8A Biomedical Grove, Immunos, 138648, Singapore, Singapore
| | - Raymond Luo
- Life Technologies, 10 Biopolis Road, 138670, Singapore, Singapore
| | - Stuart K. Archer
- Monash Bioinformatics Platform, Monash University, Clayton, Victoria, Australia
| | - Thomas Preiss
- EMBL–Australia Collaborating Group, Department of Genome Science, The John Curtin School of Medical Research (JCSMR), The Australian National University, Acton (Canberra), Australian Capital Territory, Australia
- Victor Chang Cardiac Research Institute, Darlinghurst (Sydney), New South Wales, Australia
| | - Vivek Tanavde
- Institute of Medical Biology, A*STAR, 8A Biomedical Grove, Immunos, 138648, Singapore, Singapore
- Bioinformatics Institute, A*STAR, 30 Biopolis Street, 138671, Singapore, Singapore
| | - Leah A. Vardy
- Institute of Medical Biology, A*STAR, 8A Biomedical Grove, Immunos, 138648, Singapore, Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore, Singapore
- * E-mail:
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25
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Vaz C, Wee CW, Lee GPS, Ingham PW, Tanavde V, Mathavan S. Deep sequencing of small RNA facilitates tissue and sex associated microRNA discovery in zebrafish. BMC Genomics 2015; 16:950. [PMID: 26574018 PMCID: PMC4647824 DOI: 10.1186/s12864-015-2135-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 10/23/2015] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The role of microRNAs in gene regulation has been well established. The extent of miRNA regulation also increases with increasing genome complexity. Though the number of genes appear to be equal between human and zebrafish, substantially less microRNAs have been discovered in zebrafish compared to human (miRBase Release 19). It appears that most of the miRNAs in zebrafish are yet to be discovered. RESULTS We sequenced small RNAs from brain, gut, liver, ovary, testis, eye, heart and embryo of zebrafish. In brain, gut and liver sequencing was done sex specifically. Majority of the sequenced reads (16-62 %) mapped to known miRNAs, with the exception of ovary (5.7 %) and testis (7.8 %). Using the miRNA discovery tool (miRDeep2), we discovered novel miRNAs from the unannotated reads that ranged from 7.6 to 23.0 %, with exceptions of ovary (51.4 %) and testis (55.2 %). The prediction tool identified a total of 459 novel pre-miRNAs. We compared expression of miRNAs between different tissues and between males and females to identify tissue associated and sex associated miRNAs respectively. These miRNAs could serve as putative biomarkers for these tissues. The brain and liver had highest number of tissue associated (22) and sex associated (34) miRNAs, respectively. CONCLUSIONS This study comprehensively identifies tissue and sex associated miRNAs in zebrafish. Further, we have discovered 459 novel pre-miRNAs (~30 % seed homology to human miRNA) as a genomic resource which can facilitate further investigations to understand miRNA-mRNA gene regulatory networks in zebrafish which will have implications in understanding the function of human homologs.
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Affiliation(s)
- Candida Vaz
- Bioinformatics Institute, Agency for Science Technology and Research, 30 Biopolis Street, #07-01 Matrix, Singapore, 138671, Singapore.
| | - Choon Wei Wee
- Molecular Genomics (P) Ltd, 51 Science Park Road, #04-16 The ARIES, Singapore, 117586, Singapore.
| | - Gek Ping Serene Lee
- Genome Institute of Singapore, Agency for Science Technology and Research, 60 Biopolis Street, #02-01 Genome, Singapore, 138672, Singapore.
| | - Philip W Ingham
- Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, Singapore, 308232, Singapore. .,Institute of Molecular and Cell Biology, Agency for Science Technology and Research, 61 Biopolis Drive, Singapore, 138673, Singapore.
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science Technology and Research, 30 Biopolis Street, #07-01 Matrix, Singapore, 138671, Singapore. .,Institute of Medical Biology, Agency for Science Technology and Research, 8A Biomedical Grove, #06-06 Immunos, Singapore, 138648, Singapore.
| | - Sinnakaruppan Mathavan
- Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, Singapore, 308232, Singapore. .,Genome Institute of Singapore, Agency for Science Technology and Research, 60 Biopolis Street, #02-01 Genome, Singapore, 138672, Singapore.
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26
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Quintanilla RH, Asprer JST, Vaz C, Tanavde V, Lakshmipathy U. CD44 is a negative cell surface marker for pluripotent stem cell identification during human fibroblast reprogramming. PLoS One 2014; 9:e85419. [PMID: 24416407 PMCID: PMC3887044 DOI: 10.1371/journal.pone.0085419] [Citation(s) in RCA: 42] [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: 09/01/2013] [Accepted: 11/26/2013] [Indexed: 11/25/2022] Open
Abstract
Induced pluripotent stem cells (iPSCs) are promising tools for disease research and cell therapy. One of the critical steps in establishing iPSC lines is the early identification of fully reprogrammed colonies among unreprogrammed fibroblasts and partially reprogrammed intermediates. Currently, colony morphology and pluripotent stem cell surface markers are used to identify iPSC colonies. Through additional clonal characterization, we show that these tools fail to distinguish partially reprogrammed intermediates from fully reprogrammed iPSCs. Thus, they can lead to the selection of suboptimal clones for expansion. A subsequent global transcriptome analysis revealed that the cell adhesion protein CD44 is a marker that differentiates between partially and fully reprogrammed cells. Immunohistochemistry and flow cytometry confirmed that CD44 is highly expressed in the human parental fibroblasts used for the reprogramming experiments. It is gradually lost throughout the reprogramming process and is absent in fully established iPSCs. When used in conjunction with pluripotent cell markers, CD44 staining results in the clear identification of fully reprogrammed cells. This combination of positive and negative surface markers allows for easier and more accurate iPSC detection and selection, thus reducing the effort spent on suboptimal iPSC clones.
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Affiliation(s)
- Rene H. Quintanilla
- Cell Biology & Stem Cell Sciences, Life Technologies, Carlsbad, California, United States of America
| | - Joanna S. T. Asprer
- Cell Biology & Stem Cell Sciences, Life Technologies, Carlsbad, California, United States of America
| | - Candida Vaz
- Bioinformatics Institute, Agency for Science Technology & Research (A*Star), Singapore, Republic of Singapore
| | - Vivek Tanavde
- Bioinformatics Institute, Agency for Science Technology & Research (A*Star), Singapore, Republic of Singapore
- Institute for Medical Biology, Agency for Science Technology & Research (A*Star), Singapore, Republic of Singapore
| | - Uma Lakshmipathy
- Cell Biology & Stem Cell Sciences, Life Technologies, Carlsbad, California, United States of America
- * E-mail:
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27
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Hoelting L, Scheinhardt B, Bondarenko O, Schildknecht S, Kapitza M, Tanavde V, Tan B, Lee QY, Mecking S, Leist M, Kadereit S. A 3-dimensional human embryonic stem cell (hESC)-derived model to detect developmental neurotoxicity of nanoparticles. Arch Toxicol 2012. [PMID: 23203475 PMCID: PMC3604581 DOI: 10.1007/s00204-012-0984-2] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Nanoparticles (NPs) have been shown to accumulate in organs, cross the blood-brain barrier and placenta, and have the potential to elicit developmental neurotoxicity (DNT). Here, we developed a human embryonic stem cell (hESC)-derived 3-dimensional (3-D) in vitro model that allows for testing of potential developmental neurotoxicants. Early central nervous system PAX6(+) precursor cells were generated from hESCs and differentiated further within 3-D structures. The 3-D model was characterized for neural marker expression revealing robust differentiation toward neuronal precursor cells, and gene expression profiling suggested a predominantly forebrain-like development. Altered neural gene expression due to exposure to non-cytotoxic concentrations of the known developmental neurotoxicant, methylmercury, indicated that the 3-D model could detect DNT. To test for specific toxicity of NPs, chemically inert polyethylene NPs (PE-NPs) were chosen. They penetrated deep into the 3-D structures and impacted gene expression at non-cytotoxic concentrations. NOTCH pathway genes such as HES5 and NOTCH1 were reduced in expression, as well as downstream neuronal precursor genes such as NEUROD1 and ASCL1. FOXG1, a patterning marker, was also reduced. As loss of function of these genes results in severe nervous system impairments in mice, our data suggest that the 3-D hESC-derived model could be used to test for Nano-DNT.
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Affiliation(s)
- Lisa Hoelting
- Department of Biology, University of Konstanz, Universitaetsstrasse 10, 78457 Konstanz, Germany
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28
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Chan XHD, Nama S, Gopal F, Rizk P, Ramasamy S, Sundaram G, Ow GS, Ivshina AV, Tanavde V, Haybaeck J, Kuznetsov V, Sampath P. Targeting glioma stem cells by functional inhibition of a prosurvival oncomiR-138 in malignant gliomas. Cell Rep 2012; 2:591-602. [PMID: 22921398 DOI: 10.1016/j.celrep.2012.07.012] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Revised: 02/02/2012] [Accepted: 07/27/2012] [Indexed: 10/28/2022] Open
Abstract
Malignant gliomas are the most aggressive forms of brain tumors, associated with high rates of morbidity and mortality. Recurrence and tumorigenesis are attributed to a subpopulation of tumor-initiating glioma stem cells (GSCs) that are intrinsically resistant to therapy. Initiation and progression of gliomas have been linked to alterations in microRNA expression. Here, we report the identification of microRNA-138 (miR-138) as a molecular signature of GSCs and demonstrate a vital role for miR-138 in promoting growth and survival of bona fide tumor-initiating cells with self-renewal potential. Sequence-specific functional inhibition of miR-138 prevents tumorsphere formation in vitro and impedes tumorigenesis in vivo. We delineate the components of the miR-138 regulatory network by loss-of-function analysis to identify specific regulators of apoptosis. Finally, the higher expression of miR-138 in GSCs compared to non-neoplastic tissue and association with tumor recurrence and survival highlights the clinical significance of miR-138 as a prognostic biomarker and a therapeutic target for treatment of malignant gliomas.
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Affiliation(s)
- Xin Hui Derryn Chan
- Institute of Medical Biology, Agency for Science Technology and Research, Singapore 138648, Singapore
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29
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Zhou L, Zhao SZ, Koh SK, Chen L, Vaz C, Tanavde V, Li XR, Beuerman RW. In-depth analysis of the human tear proteome. J Proteomics 2012; 75:3877-85. [PMID: 22634083 DOI: 10.1016/j.jprot.2012.04.053] [Citation(s) in RCA: 218] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 03/27/2012] [Accepted: 04/14/2012] [Indexed: 12/23/2022]
Abstract
The tears, a critical body fluid of the surface of the eye, contain an unknown number of molecules including proteins/peptides, lipids, small molecule metabolites, and electrolytes. There have been continued efforts for exploring the human tear proteome to develop biomarkers of disease. In this study, we used the high speed TripleTOF 5600 system as the platform to analyze the human tear proteome from healthy subjects (3 females and 1 male, average age: 36±14). We have identified 1543 proteins in the tears with less than 1% false discovery rate, which represents the largest number of human tear proteins reported to date. The data set was analyzed for gene ontology (GO) and compared with the human plasma proteome, NEIBank lacrimal gland gene dataset and NEIBank cornea gene dataset. This comprehensive tear protein list may serve as a reference list of human tear proteome for biomarker research of ocular diseases or establishment of MRM (Multiple Reaction Monitoring) assays for targeted analysis. Tear fluid is a useful and an accessible source not only for evaluating ocular surface tissues (cornea and conjunctiva), inflammation, lacrimal gland function and a number of disease conditions, such as dry eye as well as response to treatment.
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Affiliation(s)
- Lei Zhou
- Singapore Eye Research Institute, Singapore.
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30
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Abstract
This unit describes a protocol for genome-wide identification of translationally regulated genes during embryonic stem cell differentiation using integrated transcriptome and translation state profiling. Actively translated mRNAs associated with multiple ribosomes (known as polysomes) and translationally inactive mRNAs sequestered in messenger ribonucleoprotein particles (mRNPs), can be separated by sucrose gradient fractionation based on size. Because the number of ribosomes on a transcript correlates with the rate of synthesis of its encoded protein, this allows an operational distinction between well-translated and poorly translated mRNA molecules. In this analysis, fractionated mRNA and total RNA are used to probe microarrays to identify differentially translated genes.
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Affiliation(s)
- Prabha Sampath
- Institute of Medical Biology, Agency for Science, Technology, and Research, Singapore
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31
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Zimmer B, Schildknecht S, Kuegler PB, Tanavde V, Kadereit S, Leist M. Sensitivity of dopaminergic neuron differentiation from stem cells to chronic low-dose methylmercury exposure. Toxicol Sci 2011; 121:357-67. [PMID: 21385734 DOI: 10.1093/toxsci/kfr054] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Perinatal exposure to low doses of methylmercury (MeHg) can cause adult neurological symptoms. Rather than leading to a net cell loss, the toxicant is assumed to alter the differentiation and neuronal functions such as catecholaminergic transmission. We used neuronally differentiating murine embryonic stem cells (mESC) to explore such subtle toxicity. The mixed neuronal cultures that formed within 20 days contained a small subpopulation of tyrosine hydroxylase (TH)-positive neurons with specific dopaminergic functions such as dopamine transport (DAT) activity. The last 6 days of differentiation were associated with the functional maturation of already preformed neuronal precursors. Exposure to MeHg during this period downregulated several neuronal transcripts, without affecting housekeeping genes or causing measurable cell loss. Profiling of mRNAs relevant for neurotransmitter systems showed that dopamine receptors were coordinately downregulated, whereas known counterregulatory systems such as galanin receptor 2 were upregulated. The chronic (6 days) exposure to MeHg, but not shorter incubation periods, attenuated the expression levels of endogenous neurotrophic factors required for the maturation of TH cells. Accordingly, the size of this cell population was diminished, and DAT activity as its signature function was lost. When mixed lineage kinase activity was blocked during MeHg exposure, DAT activity was restored, and the reduction of TH levels was prevented. Thus, transcriptional profiling in differentiating mESC identified a subpopulation of neurons affected by MeHg, and a pharmacological intervention was identified that specifically protected these cells.
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Affiliation(s)
- Bastian Zimmer
- Doerenkamp-Zbinden Chair of in-vitro Toxicology and Biomedicine, Department of Biology, University of Konstanz, D-78457 Konstanz, Germany.
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32
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Saleh A, Zain RB, Tanavde V, Cheong SC. Reply to “Letter to the Editor”. Oral Oncol 2010. [DOI: 10.1016/j.oraloncology.2010.08.003] [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: 11/27/2022]
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33
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Lai RC, Arslan F, Tan SS, Tan B, Choo A, Lee MM, Chen TS, Teh BJ, Eng JKL, Sidik H, Tanavde V, Hwang WS, Lee CN, Oakley RME, Pasterkamp G, de Kleijn DP, Tan KH, Lim SK. Derivation and characterization of human fetal MSCs: An alternative cell source for large-scale production of cardioprotective microparticles. J Mol Cell Cardiol 2010; 48:1215-24. [DOI: 10.1016/j.yjmcc.2009.12.021] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Revised: 12/15/2009] [Accepted: 12/28/2009] [Indexed: 02/08/2023]
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34
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Saleh A, Zain R, Hussaini H, Ng F, Tanavde V, Hamid S, Chow A, Lim G, Abraham M, Teo S, Cheong S. Transcriptional profiling of oral squamous cell carcinoma using formalin-fixed paraffin-embedded samples. Oral Oncol 2010; 46:379-86. [DOI: 10.1016/j.oraloncology.2010.02.022] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 02/22/2010] [Accepted: 02/22/2010] [Indexed: 01/22/2023]
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35
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Koh W, Sheng CT, Tan B, Lee QY, Kuznetsov V, Kiang LS, Tanavde V. Analysis of deep sequencing microRNA expression profile from human embryonic stem cells derived mesenchymal stem cells reveals possible role of let-7 microRNA family in downstream targeting of hepatic nuclear factor 4 alpha. BMC Genomics 2010; 11 Suppl 1:S6. [PMID: 20158877 PMCID: PMC2822534 DOI: 10.1186/1471-2164-11-s1-s6] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background Recent literature has revealed that genetic exchange of microRNA between cells can be essential for cell-cell communication, tissue-specificity and developmental processes. In stem cells, as in other cells, this can be accomplished through microvesicles or exosome mediated transfer. However, molecular profiles and functions of microRNAs within the cells and in their exosomes are poorly studied. Next generation sequencing technologies could provide a broad-spectrum of microRNAs and their expression and identify possible microRNA targets. In this work, we performed deep sequencing of microRNAs to understand the profile and expression of the microRNAs in microvesicles and intracellular environment of human embryonic stem cells derived mesenchymal stem cells (hES-MSC). We outline a workflow pertaining to visualizing, statistical analysis and interpreting deep sequencing data of known intracellular and extracellular microRNAs from hES-MSC). We utilized these results of which directed our attention towards establishing hepatic nuclear factor 4 alpha (HNF4A) as a downstream target of let-7 family of microRNAs. Results In our study, significant differences in expression profile of microRNAs were found in the intracellular and extracellular environment of hES-MSC. However, a high level of let-7 family of microRNAs is predominant in both intra- and extra- cellular samples of hES-MSC. Further results derived from visualization of our alignment data and network analysis showed that let-7 family microRNAs could affect the downstream target HNF4A, which is a known endodermal differentiation marker. The elevated presence of let-7 microRNA in both intracellular and extra cellular environment further suggests a possible intercellular signalling mechanism through microvesicles transfer. We suggest that let-7 family microRNAs might play a signalling role via such a mechanism amongst populations of stem cells in maintaining self renewal property by suppressing HNF4A expression. This is in line with recent paradigm where microRNAs regulate self-renewal and differentiation pathways of embryonic stem cells by forming an integral biological network with transcription factors. Conclusion In summary, our study using a combination of alignment, statistical and network analysis tools to examine deep sequencing data of microRNAs in hES-MSC has led to a result that (i) identifies intracellular and exosome microRNA expression profiles of hES-MSCwith a possible mechanism of miRNA mediated intercellular regulation by these cells and (ii) placed HNF4A within the cross roads of regulation by the let-7 family of microRNAs.
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Affiliation(s)
- Winston Koh
- Bioinformatics Institute (BII), Agency of Science Technology and Research (A*STAR), Matrix, Singapore.
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36
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Shah VK, Desai AJ, Vasvani JB, Desai MM, Shah BP, Lall TK, Mashru MR, Shalia KK, Tanavde V, Desai SS, Jankharia BJ. Bone marrow cells for myocardial repair-a new therapeutic concept. Indian Heart J 2007; 59:482-490. [PMID: 19151463] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
AIM To assess the safety and feasibility of transfusing autologous bone marrow stem cells (ABMSC) into the culprit coronary artery after an acute anterior wall myocardial infarction (MI) and further to see the ability of ABMSC to promote improvement in Left Ventricular lsqb;LV] function at follow-up. METHODS In an ongoing phase I clinical trial, twenty-seven patients of uncomplicated acute anterior wall MI treated as per the current practicing guidelines have been included. Among these, seventeen patients received intra-coronary unfractionated ABMSCs from 77ndash;15 days after acute MI (ABMSC group) and ten patients acted as controls. RESULTS All the procedures carried out were without any complications. After 6 months, cardiac function analysis of ten patients from the ABMSC group by LV angiography and Cardiac Magnetic Resonance Imaging (MRI) demonstrated a significant rise of 12.74% (p = 0.001) and 7.1% (p = 0.001), respectively in the LV ejection fraction [LVEF]. There was an improvement in the LV systolic function wherein LV end systolic volume (LVESV) decreased significanty to 28.75% (p = 0.010) and 16.49% (p = 0.022) by LV angiography and cardiac MRI, respectively. LV end diastolic volume (LVEDV) decreased marginally by LV angiography (p = 0.548) and by cardiac MRI (p = 0.514). Five patients of the control group by LV angiography demonstrated non-significant rise of 1.0% (p = 0.706) in LVEF, 12.79% (p = 0.332) in LVEDV and 22.56% (p = 0.308) in LVESV. By cardiac MRI controls demonstrated significant rise in EF of 3.2% (p = 0.0367rpar; but non-significant fall of only 2.32% (p = 0.812) in LVEDV and 6.47% (p 7equals; 0.508) in LVESV. CONCLUSION This study shows that intracoronary infusion of ABMSC is safe and feasible after acute MI and shows a favourable trend towards the improvement of LV function and prevention of ventricular remodeling which determines long-term survival.
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Affiliation(s)
- Vinod K Shah
- Sir H. N. Hospital and Research Centre, Raja Rammohan Roy Road, Mumbai 400 004, India.
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Shetty P, Bharucha K, Tanavde V. Human umbilical cord blood serum can replace fetal bovine serum in the culture of mesenchymal stem cells. Cell Biol Int 2007; 31:293-8. [PMID: 17208468 DOI: 10.1016/j.cellbi.2006.11.010] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [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: 09/07/2006] [Revised: 10/11/2006] [Accepted: 11/05/2006] [Indexed: 11/28/2022]
Abstract
The potential of mesenchymal stem cells (MSC) to differentiate into different cell types has opened up the possibility of using these cells clinically to treat a variety of disorders. In this study we describe the use of human umbilical cord blood serum (CBS) as a replacement for fetal bovine serum (FBS) for culturing MSC from different sources. MSC from human and swine bone marrow and human umbilical cord blood were cultured in the presence of DMEM/F12 containing either FBS or CBS. Human MSC cultured in presence of FBS or CBS showed typical fibroblast-like morphology, which is characteristic of MSC. 99% of the cells cultured in FBS had a CD73+/CD105+/CD45- phenotype compared to 96% of cells cultured in CBS. Cells cultured in CBS had a significantly higher cell count as compared to cells cultured in FBS. Swine Bone Marrow MSC cultured in the presence of FBS and CBS were morphologically and phenotypically similar. Human umbilical cord blood serum supports the growth of MSC. While no significant differences were observed in the MSC numbers in swine cells cultured in the presence of FBS or CBS, human cells showed a greater proliferation potential in the presence of CBS as compared to FBS. Therefore, CBS can be used as an effective substitute to FBS for developing clinically useful protocols for culturing MSC.
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Affiliation(s)
- P Shetty
- Haematopoietic Stem Cell Group, Reliance Life Sciences Pvt Ltd, Dhirubhai Ambani Life Sciences Centre, R-282 TTC Industrial Area of MIDC, Thane Belapur Road, Rabale, Navi Mumbai 400 701, India.
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Whartenby KA, Straley EE, Kim H, Racke F, Tanavde V, Gorski KS, Cheng L, Pardoll DM, Civin CI. Transduction of donor hematopoietic stem-progenitor cells with Fas ligand enhanced short-term engraftment in a murine model of allogeneic bone marrow transplantation. Blood 2002; 100:3147-54. [PMID: 12384412 DOI: 10.1182/blood-2002-01-0118] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Fas-mediated apoptosis is a major physiologic mechanism by which activated T cells are eliminated after antigen-stimulated clonal expansion generates a specific cellular immune response. Because activated T cells are the major effectors of allograft rejection, we hypothesized that genetically modifying allogeneic bone marrow (BM) cells prior to transplantation could provide some protection from host T-cell attack, thus enhancing donor cell engraftment in bone marrow transplantation (BMT). We undertook studies to determine the outcome of lentiviral vector-mediated transduction of Fas ligand (FasL) into lineage antigen-negative (lin(-)) mouse BM cells (lin(-) BMs), in an allogeneic BMT model. FasL-modified lin(-) BMs killed Fas-expressing T cells in vitro. Mice that received transplants of allogeneic FasL(+) lin(-) BMs had enhanced short-term engraftment, after nonmyeloablative conditioning, as compared to controls. We observed no major hepatic toxicity or hematopoietic or immune impairment in recipient mice at these time points. These results suggest potential therapeutic approaches by manipulating lymphohematopoietic stem-progenitor cells to express FasL or other immune-modulating genes in the context of BMT.
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Affiliation(s)
- Katharine A Whartenby
- Sidney Kimmel Comprehensive Cancer Center at JHU, School of Medicine, Johns Hopkins University, Bunting-Blaustein Cancer Research Building, Room 2M44, 1650 Orleans Street, Baltimore, MD 21231, USA.
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Novelli EM, Cheng L, Yang Y, Leung W, Ramírez M, Tanavde V, Enger C, Civin CI. Ex vivo culture of cord blood CD34+ cells expands progenitor cell numbers, preserves engraftment capacity in nonobese diabetic/severe combined immunodeficient mice, and enhances retroviral transduction efficiency. Hum Gene Ther 1999; 10:2927-40. [PMID: 10609654 DOI: 10.1089/10430349950016348] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [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] [Indexed: 11/12/2022] Open
Abstract
Ex vivo culture of hematopoietic stem/progenitor cells could potentially improve the efficacy of human placental/umbilical cord blood (CB) in clinical hematopoietic stem cell (HSC) transplantation and allow gene transduction using conventional retroviral vectors. Therefore, we first examined the effects of a 7-day period of ex vivo culture on the hematopoietic capacity of CB CD34+ cells. Medium for the ex vivo cultures contained either serum and six recombinant human hematopoietic growth factors (GFs), including Flt-3 ligand (FL), Kit ligand (KL = stem cell factor), thrombopoietin (Tpo), interleukin 3 (IL-3), granulocyte colony-stimulating factor (G-CSF), and interleukin 6 (IL-6), or a serum-free medium containing only FL, KL, and Tpo. After culture under both ex vivo conditions, the total numbers of viable cells, CD34+ cells, colony-forming cells (CFCs), and long-term culture initiating cells (LTC-ICs) were increased. In contrast, the severe combined immunodeficiency (SCID) mouse engrafting potential (SEP) of cultured cells was slightly decreased, as compared with fresh cells. Nevertheless, cultured human CB CD34+ cells were able to generate engraftment, shown to persist for up to 20 weeks after transplantation. We next tested the efficacy of retroviral transduction of cultured cells. Transduced cultured human cells were able to engraft in NOD/SCID mice, as tested 4 weeks after transplantation, and EGFP+CD34+ cells and EGFP+ CFCs were isolated from the chimeras. Thus, although additional improvements in ex vivo culture are still needed to expand the numbers and function of human HSCs, the current conditions appear to allow gene transduction into hematopoietic SCID engrafting cells, while at least qualitatively preserving their in vivo engraftment potential.
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Affiliation(s)
- E M Novelli
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Rao SG, Chitnis VS, Deora A, Tanavde V, Desai SS. An ICAM-1 like cell adhesion molecule is responsible for CD34 positive haemopoietic stem cells adhesion to bone-marrow stroma. Cell Biol Int 1996; 20:255-9. [PMID: 8664849 DOI: 10.1006/cbir.1996.0029] [Citation(s) in RCA: 9] [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] [Indexed: 02/01/2023]
Abstract
The microenvironment in the haematopoietic organs plays an important role in regulating and sustaining differentiation and self-renewal of haematopoietic stem cells. Although crucial for stem cell maintenance and homing, the stromal cell-stem cell interactions are poorly understood. Here we show that an ICAM-like molecule is responsible for stem cell adhesion to stromal cells in vitro. The molecule was characterized by a monoclonal antibody 3E10. Immunoblotting results indicated that the molecule had an electrophoretic mobility equal to that of intercellular cell adhesion molecule-1 (ICAM-1). Binding inhibition assays, however, showed that inhibition of binding of enriched CD34 cells by 3E10 was more prominent in comparison with that of ICAM-1.
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Affiliation(s)
- S G Rao
- Chemotherapy & Stem Cell Biology Division, Cancer Research Institute, Parel, Bombay, India
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