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Vojnits K, de León A, Rathore H, Liao S, Zhao M, Gibon J, Pakpour S. ROS-dependent degeneration of human neurons induced by environmentally relevant levels of micro- and nanoplastics of diverse shapes and forms. J Hazard Mater 2024; 469:134017. [PMID: 38518696 DOI: 10.1016/j.jhazmat.2024.134017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 03/08/2024] [Accepted: 03/11/2024] [Indexed: 03/24/2024]
Abstract
Our study explores the pressing issue of micro- and nanoplastics (MNPs) inhalation and their subsequent penetration into the brain, highlighting a significant environmental health concern. We demonstrate that MNPs can indeed penetrate murine brain, warranting further investigation into their neurotoxic effects in humans. We then proceed to test the impact of MNPs at environmentally relevant concentrations, with focusing on variations in size and shape. Our findings reveal that these MNPs induce oxidative stress, cytotoxicity, and neurodegeneration in human neurons, with cortical neurons being more susceptible than nociceptors. Furthermore, we examine the role of biofilms on MNPs, demonstrating that MNPs can serve as a vehicle for pathogenic biofilms that significantly exacerbate these neurotoxic effects. This sequence of investigations reveals that minimal MNPs accumulation can cause oxidative stress and neurodegeneration in human neurons, significantly risking brain health and highlights the need to understand the neurological consequences of inhaling MNPs. Overall, our developed in vitro testing battery has significance in elucidating the effects of environmental factors and their associated pathological mechanisms in human neurons.
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Affiliation(s)
- Kinga Vojnits
- School of Engineering, University of British Columbia, Kelowna, BC, Canada
| | - Andrés de León
- School of Engineering, University of British Columbia, Kelowna, BC, Canada; Department of Biology, University of British Columbia, Kelowna, BC, Canada
| | - Harneet Rathore
- School of Engineering, University of British Columbia, Kelowna, BC, Canada
| | - Sophia Liao
- School of Engineering, University of British Columbia, Kelowna, BC, Canada
| | - Michael Zhao
- School of Engineering, University of British Columbia, Kelowna, BC, Canada
| | - Julien Gibon
- Department of Biology, University of British Columbia, Kelowna, BC, Canada; Office of Vice-Principal, Research and Innovation, McGill University, Montreal, Quebec, Canada
| | - Sepideh Pakpour
- School of Engineering, University of British Columbia, Kelowna, BC, Canada.
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2
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Vojnits K, Mohseni M, Parvinzadeh Gashti M, Nadaraja AV, Karimianghadim R, Crowther B, Field B, Golovin K, Pakpour S. Advancing Antimicrobial Textiles: A Comprehensive Study on Combating ESKAPE Pathogens and Ensuring User Safety. Materials (Basel) 2024; 17:383. [PMID: 38255551 PMCID: PMC10817529 DOI: 10.3390/ma17020383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/21/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024]
Abstract
Antibiotic-resistant bacteria, ESKAPE pathogens, present a significant and alarming threat to public health and healthcare systems. This study addresses the urgent need to combat antimicrobial resistance by exploring alternative ways to reduce the health and cost implications of infections caused by these pathogens. To disrupt their transmission, integrating antimicrobial textiles into personal protective equipment (PPE) is an encouraging avenue. Nevertheless, ensuring the effectiveness and safety of these textiles remains a persistent challenge. To achieve this, we conduct a comprehensive study that systematically compares the effectiveness and potential toxicity of five commonly used antimicrobial agents. To guide decision making, a MULTIMOORA method is employed to select and rank the optimal antimicrobial textile finishes. Through this approach, we determine that silver nitrate is the most suitable choice, while a methoxy-terminated quaternary ammonium compound is deemed less favorable in meeting the desired criteria. The findings of this study offer valuable insights and guidelines for the development of antimicrobial textiles that effectively address the requirements of effectiveness, safety, and durability. Implementing these research outcomes within the textile industry can significantly enhance protection against microbial infections, contribute to the improvement of public health, and mitigate the spread of infectious diseases.
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Affiliation(s)
- Kinga Vojnits
- School of Engineering, University of British Columbia, Kelowna, BC V6T 1Z2, Canada; (K.V.); (R.K.); (B.C.)
| | - Majid Mohseni
- Research and Development Laboratory, PRE Labs, Inc., Kelowna, BC V1X 7Y5, Canada;
| | | | - Anupama Vijaya Nadaraja
- Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada; (A.V.N.); (K.G.)
| | - Ramin Karimianghadim
- School of Engineering, University of British Columbia, Kelowna, BC V6T 1Z2, Canada; (K.V.); (R.K.); (B.C.)
| | - Ben Crowther
- School of Engineering, University of British Columbia, Kelowna, BC V6T 1Z2, Canada; (K.V.); (R.K.); (B.C.)
| | - Brad Field
- PRE Labs, Inc., Kelowna, BC V1X 7Y5, Canada;
| | - Kevin Golovin
- Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada; (A.V.N.); (K.G.)
| | - Sepideh Pakpour
- School of Engineering, University of British Columbia, Kelowna, BC V6T 1Z2, Canada; (K.V.); (R.K.); (B.C.)
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3
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Pakpour S, Vojnits K, Alousi S, Khalid MF, Fowler JD, Wang Y, Tan AM, Lam MI, Zhao M, Calderon E, Luka GS, Hoorfar M, Kazemian N, Isazadeh S, Ashkarran AA, Runstadler JA, Mahmoudi M. Magnetic Levitation System Isolates and Purifies Airborne Viruses. ACS Nano 2023. [PMID: 37417775 DOI: 10.1021/acsnano.3c01677] [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] [Subscribe] [Scholar Register] [Indexed: 07/08/2023]
Abstract
Detection of viable viruses in the air is critical in order to determine the level of risk associated with the airborne diffusion of viruses. Different methods have been developed for the isolation, purification, and detection of viable airborne viruses, but they require an extensive processing time and often present limitations including low physical efficiency (i.e., the amount of collected viruses), low biological efficiency (i.e., the number of viable viruses), or a combination of all. To mitigate such limitations, we have employed an efficient technique based on the magnetic levitation (Maglev) technique with a paramagnetic solution and successfully identified distinct variations in levitation and density characteristics among bacteria (Escherichia coli), phages (MS2), and human viruses (SARS-CoV-2 and influenza H1N1). Notably, the Maglev approach enabled a significant enrichment of viable airborne viruses in air samples. Furthermore, the enriched viruses obtained through Maglev exhibited high purity, rendering them suitable for direct utilization in subsequent analyses such as reverse transcription-polymerase chain reaction (RT-PCR) or colorimetric assays. The system is portable, easy to use, and cost-efficient and can potentially provide proactive surveillance data for monitoring future outbreaks of airborne infectious diseases and allow for the induction of various preventative and mitigative measures.
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Affiliation(s)
- Sepideh Pakpour
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Kinga Vojnits
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Sahar Alousi
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Muhammad Faizan Khalid
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - James D Fowler
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Yongliang Wang
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
- School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao City, 130012, People's Republic of China
| | - Andrea Marie Tan
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Man In Lam
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Michael Zhao
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Enrique Calderon
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - George S Luka
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Mina Hoorfar
- Department of Mechanical Engineering, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada
| | - Negin Kazemian
- School of Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Siavash Isazadeh
- Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Ali Akbar Ashkarran
- Department of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824, United States
| | - Jonathan A Runstadler
- Department of Infectious Disease and Global Health, Tufts University, Medford, Massachusetts 02155, United States
| | - Morteza Mahmoudi
- Department of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824, United States
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Golubeva D, Porras DP, Doyle M, Reid JC, Tanasijevic B, Boyd AL, Vojnits K, Elrafie A, Qiao A, Bhatia M. Reprogramming of Acute Myeloid Leukemia Patients Cells: Harboring Cancer Mutations Requires Targeting of AML Hierarchy. Stem Cells Transl Med 2023:7179280. [PMID: 37226319 DOI: 10.1093/stcltm/szad022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 03/30/2023] [Indexed: 05/26/2023] Open
Abstract
Screening of primary patient acute myeloid leukemia (AML) cells is challenging based on intrinsic characteristics of human AML disease and patient-specific conditions required to sustain AML cells in culture. This is further complicated by inter- and intra-patient heterogeneity, and "contaminating" normal cells devoid of molecular AML mutations. Derivation of induced pluripotent stem cells (iPSCs) from human somatic cells has provided approaches for the development of patient-specific models of disease biology and has recently included AML. Although reprogramming patient-derived cancer cells to pluripotency allows for aspects of disease modeling, the major limitation preventing applications and deeper insights using AML-iPSCs is the rarity of success and limited subtypes of AML disease that can be captured by reprogramming to date. Here, we tested and refined methods including de novo, xenografting, naïve versus prime states and prospective isolation for reprogramming AML cells using a total of 22 AML patient samples representing the wide variety of cytogenetic abnormalities. These efforts allowed us to derive genetically matched healthy control (isogenic) lines and capture clones found originally in patients with AML. Using fluorescently activated cell sorting, we revealed that AML reprogramming is linked to the differentiation state of diseased tissue, where use of myeloid marker CD33 compared to the stem cell marker, CD34, reduces reprogramming capture of AML+ clones. Our efforts provide a platform for further optimization of AML-iPSC generation, and a unique library of iPSC derived from patients with AML for detailed cellular and molecular study.
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Affiliation(s)
- Diana Golubeva
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Deanna P Porras
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Meaghan Doyle
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Jennifer C Reid
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Borko Tanasijevic
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Allison L Boyd
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Kinga Vojnits
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Amro Elrafie
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Amy Qiao
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
| | - Mickie Bhatia
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada
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5
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Sit D, Vojnits K, Yang H, Chen KT, Zhao B, Rao S, Lee LH, Davies J, Yang HM, Pakpour S, Atrchian S. 119: High-Quality DNA Extraction and GUT Microbial Detection to Evaluate Pathologic Response Following Neoadjuvant Treatment for Locally Advanced Rectal Cancer. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)04398-5] [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: 11/26/2022]
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6
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Lam MI, Vojnits K, Zhao M, MacNaughton P, Pakpour S. The effect of indoor daylight spectrum and intensity on viability of indoor pathogens on different surface materials. Indoor Air 2022; 32:e13076. [PMID: 35904390 DOI: 10.1111/ina.13076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 06/28/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Built environments play a key role in the transmission of infectious diseases. Ventilation rates, air temperature, and humidity affect airborne transmission while cleaning protocols, material properties and light exposure can influence viability of pathogens on surfaces. We investigated how indoor daylight intensity and spectrum through electrochromic (EC) windows can impact the growth rate and viability of indoor pathogens on different surface materials (polyvinyl chloride [PVC] fabric, polystyrene, and glass) compared to traditional blinds. Results showed that tinted EC windows let in higher energy, shorter wavelength daylight than those with clear window and blind. The growth rates of pathogenic bacteria and fungi were significantly lower in spaces with EC windows compared to blinds: nearly 100% growth rate reduction was observed when EC windows were in their clear state followed by 41%-100% reduction in bacterial growth rate and 26%-42% reduction in fungal growth rate when EC windows were in their darkest tint. Moreover, bacterial viabilities were significantly lower on PVC fabric when they were exposed to indoor light at EC-tinted window. These findings are deemed fundamental to the design of healthy modern buildings, especially those that encompass sick and vulnerable individuals.
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Affiliation(s)
- Man In Lam
- Faculty of Applied Science, School of Engineering, University of British Columbia, Kelowna, British Columbia, Canada
| | - Kinga Vojnits
- Faculty of Applied Science, School of Engineering, University of British Columbia, Kelowna, British Columbia, Canada
| | - Michael Zhao
- Faculty of Applied Science, School of Engineering, University of British Columbia, Kelowna, British Columbia, Canada
| | - Piers MacNaughton
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Sepideh Pakpour
- Faculty of Applied Science, School of Engineering, University of British Columbia, Kelowna, British Columbia, Canada
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7
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Vojnits K, Nakanishi M, Porras D, Kim Y, Feng Z, Golubeva D, Bhatia M. Developing CRISPR/Cas9-Mediated Fluorescent Reporter Human Pluripotent Stem-Cell Lines for High-Content Screening. Molecules 2022; 27:molecules27082434. [PMID: 35458632 PMCID: PMC9025795 DOI: 10.3390/molecules27082434] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 02/28/2022] [Revised: 04/03/2022] [Accepted: 04/06/2022] [Indexed: 12/22/2022] Open
Abstract
Application of the CRISPR/Cas9 system to knock in fluorescent proteins to endogenous genes of interest in human pluripotent stem cells (hPSCs) has the potential to facilitate hPSC-based disease modeling, drug screening, and optimization of transplantation therapy. To evaluate the capability of fluorescent reporter hPSC lines for high-content screening approaches, we targeted EGFP to the endogenous OCT4 locus. Resulting hPSC–OCT4–EGFP lines generated expressed EGFP coincident with pluripotency markers and could be adapted to multi-well formats for high-content screening (HCS) campaigns. However, after long-term culture, hPSCs transiently lost their EGFP expression. Alternatively, through EGFP knock-in to the AAVS1 locus, we established a stable and consistent EGFP-expressing hPSC–AAVS1–EGFP line that maintained EGFP expression during in vitro hematopoietic and neural differentiation. Thus, hPSC–AAVS1–EGFP-derived sensory neurons could be adapted to a high-content screening platform that can be applied to high-throughput small-molecule screening and drug discovery campaigns. Our observations are consistent with recent findings indicating that high-frequency on-target complexities appear following CRISPR/Cas9 genome editing at the OCT4 locus. In contrast, we demonstrate that the AAVS1 locus is a safe genomic location in hPSCs with high gene expression that does not impact hPSC quality and differentiation. Our findings suggest that the CRISPR/Cas9-integrated AAVS1 system should be applied for generating stable reporter hPSC lines for long-term HCS approaches, and they underscore the importance of careful evaluation and selection of the applied reporter cell lines for HCS purposes.
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Vojnits K, Mahammad S, Collins TJ, Bhatia M. Chemotherapy-Induced Neuropathy and Drug Discovery Platform Using Human Sensory Neurons Converted Directly from Adult Peripheral Blood. Stem Cells Transl Med 2019; 8:1180-1191. [PMID: 31347791 PMCID: PMC6811699 DOI: 10.1002/sctm.19-0054] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 02/25/2019] [Accepted: 06/07/2019] [Indexed: 12/11/2022] Open
Abstract
Chemotherapy‐induced peripheral neuropathy (PN) is a disorder damaging the peripheral nervous system (PNS) and represents one of the most common side effects of chemotherapy, negatively impacting the quality of life of patients to the extent of withdrawing life‐saving chemotherapy dose or duration. Unfortunately, the pathophysiological effects of PN are poorly understood, in part due to the lack of availability of large numbers of human sensory neurons (SNs) for study. Previous reports have demonstrated that human SNs can be directly converted from primitive CD34+ hematopoietic cells, but was limited to a small‐scale product of SNs and derived exclusively from less abundant allogenic sources of cord or drug mobilized peripheral blood (PB). To address this shortcoming, we have developed and report detailed procedures toward the generation of human SN directly converted from conventionally drawn PB of adults that can be used in a high‐content screening platform for discovery‐based studies of chemotherapy agents on neuronal biology. In the absence of mobilization drugs, cryogenically preserved adult human PB could be induced to (i)SN via development through expandable neural precursor differentiation. iSNs could be transferable to high‐throughput procedures suitable for high‐content screening applicable to neuropathy for example, alterations in neurite morphology in response to chemotherapeutics. Our study provides the first reported platform using adult PB‐derived iSNs to study peripheral nervous system‐related neuropathies as well as target and drug screening potential for the ability to prevent, block, or repair chemotherapy‐induced PN damage. stem cells translational medicine2019;8:1180–1191
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Affiliation(s)
- Kinga Vojnits
- Stem Cell and Cancer Research Institute, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Saleemulla Mahammad
- Stem Cell and Cancer Research Institute, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Tony J Collins
- Stem Cell and Cancer Research Institute, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Mickie Bhatia
- Stem Cell and Cancer Research Institute, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada.,Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
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9
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Vojnits K, Pan H, Dai X, Sun H, Tong Q, Darabi R, Huard J, Li Y. Functional Neuronal Differentiation of Injury-Induced Muscle-Derived Stem Cell-Like Cells with Therapeutic Implications. Sci Rep 2017; 7:1177. [PMID: 28446779 PMCID: PMC5430871 DOI: 10.1038/s41598-017-01311-4] [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: 07/22/2016] [Accepted: 03/27/2017] [Indexed: 12/23/2022] Open
Abstract
Mammalian skeletal muscles contain a number of heterogeneous cell populations. Our previous study characterized a unique population of myogenic lineage stem cells that can be isolated from adult mammalian skeletal muscles upon injury. These injury-induced muscle-derived stem cell-like cells (iMuSCs) displayed a multipotent state with sensitiveness and strong migration abilities. Here, we report that these iMuSCs have the capability to form neurospheres that represent multiple neural phenotypes. The induced neuronal cells expressed various neuron-specific proteins, their mRNA expression during neuronal differentiation recapitulated embryonic neurogenesis, they generated action potentials, and they formed functional synapses in vitro. Furthermore, the transplantation of iMuSCs or their cell extracts into the muscles of mdx mice (i.e., a mouse model of Duchenne Muscular Dystrophy [DMD]) could restore the morphology of their previously damaged neuromuscular junctions (NMJs), suggesting that the beneficial effects of iMuSCs may not be restricted to cell restoration alone, but also due to their transient paracrine actions. The current study reveals the essential role of iMuSCs in the restoration of NMJs related to injuries and diseases.
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Affiliation(s)
- Kinga Vojnits
- Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases (IMM) at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA.,Department of Pediatric Surgery, University of Texas McGovern Medical School at Houston, Houston, 77030, TX, USA
| | - Haiying Pan
- Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases (IMM) at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA.,Department of Orthopeadic, University of Texas McGovern Medical School at Houston, Houston, 77030, TX, USA
| | - Xiaojing Dai
- Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases (IMM) at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA.,Department of Pediatric Surgery, University of Texas McGovern Medical School at Houston, Houston, 77030, TX, USA
| | - Hao Sun
- Center for Metabolic and Degenerative Disease, The IMM at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA
| | - Qingchun Tong
- Center for Metabolic and Degenerative Disease, The IMM at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA
| | - Radbod Darabi
- Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases (IMM) at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA
| | - Johnny Huard
- Department of Orthopeadic, University of Texas McGovern Medical School at Houston, Houston, 77030, TX, USA.,Center for Sports Regenerative Medicine, Steadman Philippon Research Institute, Vail, CO, USA.,Center for Tissue Engineering and Aging Research, The IMM at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA
| | - Yong Li
- Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases (IMM) at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA. .,Department of Pediatric Surgery, University of Texas McGovern Medical School at Houston, Houston, 77030, TX, USA. .,Center for Tissue Engineering and Aging Research, The IMM at the University of Texas Health Science Center at Houston, TX, Houston, 77030, USA.
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Pan H, Vojnits K, Liu TT, Meng F, Yang L, Wang Y, Huard J, Cox CS, Lally KP, Li Y. MMP1 gene expression enhances myoblast migration and engraftment following implanting into mdx/SCID mice. Cell Adh Migr 2016. [PMID: 26223276 DOI: 10.4161/19336918.2014.983799] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Myoblast transplantation (MT) is a method to introduce healthy genes into abnormal skeletal muscle. It has been considered as a therapeutic modality in the last few decades for diseases such as Duchenne Muscular Dystrophy (DMD). However, challenges including cell death and poor graft engraftment have limited its application. The current experiment utilizes MMP1 gene transfer to improve the efficacy of myoblast transplantation into the diseased dystrophic skeletal muscle of mdx mice. Our results indicated that MMP1 expression can promote myogenic differentiation and fusion capacities, increase migration of MMP1 expressing myoblasts in vitro, as well as improve engraftment of dystrophin positive myofibers in vivo. Taken together, our observation suggests that the addition of MMP1 can overcome limitations in MT and improve its clinical efficacy.
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Affiliation(s)
- Haiying Pan
- a Department of Pediatric Surgery ; University of Texas Medical School at Houston ; Houston , TX USA
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11
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Vojnits K, Pan H, Mu X, Li Y. Characterization of an Injury Induced Population of Muscle-Derived Stem Cell-Like Cells. Sci Rep 2015; 5:17355. [PMID: 26611864 PMCID: PMC4661568 DOI: 10.1038/srep17355] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [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: 06/15/2015] [Accepted: 10/29/2015] [Indexed: 12/16/2022] Open
Abstract
We recently discovered a novel population of stem cells from the injured murine skeletal muscle. These injury induced muscle-derived stem cell-like cells (iMuSCs) are partially reprogrammed from differentiated myogenic cells and display a pluripotent-like state. The iMuSCs exhibit stem cell properties including the ability to differentiate into multiple lineages, such as neurogenic and myogenic differentiations; they also display a superior migration capacity that demonstrating a strong ability of muscle engraftment in vivo. IMuSCs express several pluripotent and myogenic stem cell markers; have the capability to form embryoid bodies and teratomas, and can differentiate into all three germ layers. Moreover, blastocyst microinjection showed that the iMuSCs contributed to chimeric embryos but could not complete germline transmission. Our results indicate that the iMuSCs are in a partially reprogrammed state of pluripotency, which are generated by the microenvironment of injured skeletal muscle.
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Affiliation(s)
- Kinga Vojnits
- Department of Pediatric Surgery, University of Texas Medical School at Houston, TX 77030, USA.,Center for Stem Cell and Regenerative Medicine, University of Texas Health Science Center at Houston (UTHealth), TX 77030, USA
| | - HaiYing Pan
- Department of Pediatric Surgery, University of Texas Medical School at Houston, TX 77030, USA.,Center for Stem Cell and Regenerative Medicine, University of Texas Health Science Center at Houston (UTHealth), TX 77030, USA
| | - Xiaodong Mu
- Stem Cell Research Center, University of Pittsburgh, Medical School, Pittsburgh, PA 15213, USA
| | - Yong Li
- Department of Pediatric Surgery, University of Texas Medical School at Houston, TX 77030, USA.,Center for Stem Cell and Regenerative Medicine, University of Texas Health Science Center at Houston (UTHealth), TX 77030, USA
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Liao GP, Vojnits K, Choi Y, Aroom KR, Hetz RA, Xue H, Triolo F, Li Y, Lally KP, Cox CS. Human Amniotic Fluid-Derived Multipotent Stromal Cells Enhance Decellularized Diaphragm Scaffold Regeneration and Function in a Rodent Model of Congenital Diaphragmatic Hernia. J Am Coll Surg 2014. [DOI: 10.1016/j.jamcollsurg.2014.07.176] [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: 11/25/2022]
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13
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Vojnits K, Yang L, Zhan M, Cox C, Li Y. Very small embryonic-like cells in the mirror of regenerative medicine. J Stem Cells 2014; 9:1-16. [PMID: 25158086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Regenerative medicine with the promise of complete organ restoration could change the treatment paradigm for various degenerative disorders. In order to develop successful, safe and efficient regenerative therapies, appropriate amount of pluripotent autologous cells are desired. Pluripotent stem cell lines, such as embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs), offer a unique opportunity to derive various cell types that can be exploited for regenerative medicine. However, their application in therapies is limited due to inherent potential tumorigenesis, problems with immune-rejection, applied reprogramming methods, and ethical considerations. Recent reports on the establishment of very small embryonic-like cells (VSELs) are pointing to a way out of this dilemma, since it is proposed that these cells have similar characteristics as ESCs and could serve as basis for therapeutic applications. A careful scientific comparison of VSELs is now needed in order to make judgments about their capabilities and characteristics. In any case, the development of successful, safe and efficient regenerative therapies based on human pluripotent cells requires additional quality assessments of critical parameters that are also summarized within the review.
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Klaric M, Winkler J, Vojnits K, Meganathan K, Jagtap S, Ensenat-Waser R, Hescheler J, Sachinidis A, Bremer-Hoffmann S. Current status of human pluripotent stem cell based in vitro toxicity tests. Front Biosci (Schol Ed) 2013; 5:118-133. [PMID: 23277040 DOI: 10.2741/s361] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [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: 06/01/2023]
Abstract
The present review assesses the current status of in vitro tests based on human pluripotent stem cell-derived toxicologically relevant target cells. The majority of the evaluated test systems are in the phase of test development. In particular the success rates of differentiation protocols and their reproducibility are varying depending on different culture conditions but also on the assessed marker panel and the functional evaluation of the cells. However, the amount of differentiated cells decreases in relation to their maturation status. No harmonization has been achieved yet about the required maturation status of the cellular models to be used for toxicological applications. Even with an established cellular model, the selection of appropriate readouts is challenging. Some areas of toxicity, such as developmental toxicity, suffer from insufficient knowledge on predictive biomarkers which leads to difficulties in the selection of the most appropriate endpoints. In this heterogeneous context the rapidly increasing knowledge about 'omics' technologies, might lead to an improvement of the current situation and allow the establishment of more predictive human in vitro toxicity tests.
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Affiliation(s)
- Martina Klaric
- Systems toxicology unit, ECVAM, European Centre for the Validation of Alternative Methods, IHCP, JRC, European Commission, Ispra, VA, Italy
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Nerini-Molteni S, Mennecozzi M, Fabbri M, G. Sacco M, Vojnits K, Compagnoni A, Gribaldo L, Bremer-Hoffmann S. MicroRNA Profiling as a Tool for Pathway Analysis in a Human In Vitro Model for Neural Development. Curr Med Chem 2012. [DOI: 10.2174/092986712804485665] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Vojnits K, Ensenat-Waser R, A. Gaspar J, Meganathan K, Jagtap S, Hescheler J, Sachinidis A, Bremer-Hoffmann S. A Tanscriptomics Study to Elucidate the Toxicological Mechanism of Methylmercury Chloride in a Human Stem Cell Based In Vitro Test. Curr Med Chem 2012. [DOI: 10.2174/092986712804485728] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Vojnits K, Ensenat-Waser R, A. Gaspar J, Meganathan K, Jagtap S, Hescheler J, Sachinidis A, Bremer-Hoffmann S. A Transcriptomics Study to Elucidate the Toxicological Mechanism of Methylmercury Chloride in a Human Stem Cell Based In Vitro Test. Curr Med Chem 2012. [DOI: 10.2174/0929867311209066224] [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: 11/22/2022]
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Nerini-Molteni S, Mennecozzi M, Fabbri M, G. Sacco M, Vojnits K, Compagnoni A, Gribaldo L, Bremer-Hoffmann S. MicroRNA Profiling as a Tool for Pathway Analysis in a Human In Vitro Model for Neural Development. Curr Med Chem 2012. [DOI: 10.2174/0929867311209066214] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Krug AK, Kolde R, Gaspar JA, Rempel E, Balmer NV, Meganathan K, Vojnits K, Baquié M, Waldmann T, Ensenat-Waser R, Jagtap S, Evans RM, Julien S, Peterson H, Zagoura D, Kadereit S, Gerhard D, Sotiriadou I, Heke M, Natarajan K, Henry M, Winkler J, Marchan R, Stoppini L, Bosgra S, Westerhout J, Verwei M, Vilo J, Kortenkamp A, Hescheler J, Hothorn L, Bremer S, van Thriel C, Krause KH, Hengstler JG, Rahnenführer J, Leist M, Sachinidis A. Human embryonic stem cell-derived test systems for developmental neurotoxicity: a transcriptomics approach. Arch Toxicol 2012. [PMID: 23179753 PMCID: PMC3535399 DOI: 10.1007/s00204-012-0967-3] [Citation(s) in RCA: 181] [Impact Index Per Article: 15.1] [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] [Indexed: 12/12/2022]
Abstract
Developmental neurotoxicity (DNT) and many forms of reproductive toxicity (RT) often manifest themselves in functional deficits that are not necessarily based on cell death, but rather on minor changes relating to cell differentiation or communication. The fields of DNT/RT would greatly benefit from in vitro tests that allow the identification of toxicant-induced changes of the cellular proteostasis, or of its underlying transcriptome network. Therefore, the ‘human embryonic stem cell (hESC)-derived novel alternative test systems (ESNATS)’ European commission research project established RT tests based on defined differentiation protocols of hESC and their progeny. Valproic acid (VPA) and methylmercury (MeHg) were used as positive control compounds to address the following fundamental questions: (1) Does transcriptome analysis allow discrimination of the two compounds? (2) How does analysis of enriched transcription factor binding sites (TFBS) and of individual probe sets (PS) distinguish between test systems? (3) Can batch effects be controlled? (4) How many DNA microarrays are needed? (5) Is the highest non-cytotoxic concentration optimal and relevant for the study of transcriptome changes? VPA triggered vast transcriptional changes, whereas MeHg altered fewer transcripts. To attenuate batch effects, analysis has been focused on the 500 PS with highest variability. The test systems differed significantly in their responses (<20 % overlap). Moreover, within one test system, little overlap between the PS changed by the two compounds has been observed. However, using TFBS enrichment, a relatively large ‘common response’ to VPA and MeHg could be distinguished from ‘compound-specific’ responses. In conclusion, the ESNATS assay battery allows classification of human DNT/RT toxicants on the basis of their transcriptome profiles.
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Affiliation(s)
- Anne K. Krug
- Department of Biology, University of Konstanz (UKN), 78457 Constance, Germany
| | - Raivo Kolde
- OÜ Quretec (Qure), Limited Liability Company, 51003 Tartu, Estonia
- Institute of Computer Science, University of Tartu, 50409 Tartu, Estonia
| | - John A. Gaspar
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Eugen Rempel
- Department of Statistics, TU Dortmund University , 44221 Dortmund, Germany
| | - Nina V. Balmer
- Department of Biology, University of Konstanz (UKN), 78457 Constance, Germany
| | - Kesavan Meganathan
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Kinga Vojnits
- Commission of the European Communities (JRC) Joint Research Centre, 1049 Brussels, Belgium
| | - Mathurin Baquié
- Department of Pathology and Immunology, Geneva Medical Faculty, University of Geneva (UNIGE), 1211 Geneva 4, Switzerland
| | - Tanja Waldmann
- Department of Biology, University of Konstanz (UKN), 78457 Constance, Germany
| | - Roberto Ensenat-Waser
- Commission of the European Communities (JRC) Joint Research Centre, 1049 Brussels, Belgium
| | - Smita Jagtap
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | | | - Stephanie Julien
- Department of Pathology and Immunology, Geneva Medical Faculty, University of Geneva (UNIGE), 1211 Geneva 4, Switzerland
| | - Hedi Peterson
- Department of Pathology and Immunology, Geneva Medical Faculty, University of Geneva (UNIGE), 1211 Geneva 4, Switzerland
| | - Dimitra Zagoura
- Commission of the European Communities (JRC) Joint Research Centre, 1049 Brussels, Belgium
| | - Suzanne Kadereit
- Department of Biology, University of Konstanz (UKN), 78457 Constance, Germany
| | - Daniel Gerhard
- Gottfried Wilhelm Leibniz University (LUH), Institute for Biostatistics, 30167 Hannover, Germany
| | - Isaia Sotiriadou
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Michael Heke
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Karthick Natarajan
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Margit Henry
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Johannes Winkler
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Rosemarie Marchan
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Technical University of Dortmund, 44139 Dortmund, Germany
| | - Luc Stoppini
- Department of Pathology and Immunology, Geneva Medical Faculty, University of Geneva (UNIGE), 1211 Geneva 4, Switzerland
| | - Sieto Bosgra
- Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek (TNO), 2628 VK Delft, The Netherlands
| | - Joost Westerhout
- Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek (TNO), 2628 VK Delft, The Netherlands
| | - Miriam Verwei
- Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek (TNO), 2628 VK Delft, The Netherlands
| | - Jaak Vilo
- OÜ Quretec (Qure), Limited Liability Company, 51003 Tartu, Estonia
- Institute of Computer Science, University of Tartu, 50409 Tartu, Estonia
| | | | - Jürgen Hescheler
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
| | - Ludwig Hothorn
- Gottfried Wilhelm Leibniz University (LUH), Institute for Biostatistics, 30167 Hannover, Germany
| | - Susanne Bremer
- Commission of the European Communities (JRC) Joint Research Centre, 1049 Brussels, Belgium
| | - Christoph van Thriel
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Technical University of Dortmund, 44139 Dortmund, Germany
| | - Karl-Heinz Krause
- Department of Pathology and Immunology, Geneva Medical Faculty, University of Geneva (UNIGE), 1211 Geneva 4, Switzerland
| | - Jan G. Hengstler
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Technical University of Dortmund, 44139 Dortmund, Germany
| | - Jörg Rahnenführer
- Department of Statistics, TU Dortmund University , 44221 Dortmund, Germany
| | - Marcel Leist
- Department of Biology, University of Konstanz (UKN), 78457 Constance, Germany
| | - Agapios Sachinidis
- Center of Physiology and Pathophysiology, Institute of Neurophysiology, University of Cologne (UKK), Robert-Koch-Str. 39, 50931 Cologne, Germany
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Nerini-Molteni S, Mennecozzi M, Fabbri M, Sacco MG, Vojnits K, Compagnoni A, Gribaldo L, Bremer-Hoffmann S. MicroRNA profiling as a tool for pathway analysis in a human in vitro model for neural development. Curr Med Chem 2012; 19:6214-6223. [PMID: 22664252] [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] [Received: 12/30/2011] [Revised: 03/22/2012] [Accepted: 03/26/2012] [Indexed: 06/01/2023]
Abstract
MicroRNAs (miRNA) are a recently recognised class of small, non-coding RNAs involved in the post-transcriptional regulation of gene expression and with crucial implication for mammalian development. In particular, they play key roles in neuronal development, from early neurogenesis to neuronal differentiation and synaptic development, and also in in vitro systems. The detection of embryotoxic hazards in the preclinical phase is still a challenge, often due to species-species variations. In this study we analysed whether miRNA expression profiles in a human pluripotent cell model can be a helpful tool for a more mechanistic approach to pharmacology and toxicology. Differentiating human pluripotent cells were repeatedly treated with non-cytotoxic doses of methylmercury chloride (MeHgCl), a well known brain developmental toxicant. The expression of proteins, mRNA and miRNAs were used to monitor successful neural differentiation. Significant changes in the expression of 12 miRNAs were detected. By using available bioinformatics tools, we obtained validated and predicted targets for the identified miRNAs, on which we performed functional clustering analysis. Through this approach, we identified several terms and functional clusters associated with neural development, together with indicators of general toxic effect, such as apoptosis or stress response-related genes. Interestingly, our results also suggest a previously undiscovered association between MeHgCl and the ubiquitin-proteasome protein degradation pathway. Although further investigations are needed, our results suggest that miRNA expression analysis is a powerful tool in pathway-oriented toxicity and could improve early-phase hazard assessments.
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Affiliation(s)
- S Nerini-Molteni
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, Ispra, Italy
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Vojnits K, Ensenat-Waser R, Gaspar JA, Meganathan K, Jagtap S, Hescheler J, Sachinidis A, Bremer-Hoffmann S. A tanscriptomics study to elucidate the toxicological mechanism of methylmercury chloride in a human stem cell based in vitro test. Curr Med Chem 2012; 19:6224-6232. [PMID: 23244585] [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] [Received: 02/02/2012] [Revised: 04/25/2012] [Accepted: 11/19/2012] [Indexed: 06/01/2023]
Abstract
Traditional approaches in evaluating the hazard of drug candidates on the developing offspring are often time-consuming and cost-intensive. Moreover, variations in the toxicological response of different animal species to the tested substance cause severe problems when extrapolating safety dosages for humans. Therefore, more predictive and relevant toxicological systems based on human cell models are required. In the presented study the environmental toxicant methylmercury chloride (MeHgCl), known to cause structural developmental abnormalities in the brain, was used as reference compound to develop a concept contributing to a mechanistic understanding of the toxicity of an investigated substance. Despite the fact, that there are significant data available from animal studies and from poisonings in Japan and Iraq, uncertainties on the mechanism of MeHgCl during human development are still remaining and qualify the substance for further analysis. Transcriptomics analysis in combination with a human cell based in vitro model has been used in order to elucidate the toxicity of MeHgCl at molecular level. Differentiating neural precursor cells that have been exposed continuously to non- and low-cytotoxic concentrations of MeHgCl were investigated. Quantitative change in the mRNA expression profiles of selected genes demonstrated the sensitivity of the cell model and its qualification for a transcriptomics study screening changes in the expression profile of the complete human genome of MeHgCl-treated human neural cells. Potential biomarkers were identified and these candidate marker genes as well as their involvement in a possible toxic mechanism of MeHgCl during the human neurulation process are hereby introduced. The study confirmed the hypothesis that a cellular model based on a human stem cell line can be applied for elucidating unknown mode of actions of developmental toxicants.
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Affiliation(s)
- K Vojnits
- Systems Toxicology, Institute for Health and Consumer Protection (IHCP), Joint Research Centre (JRC) - European Commission, Italy
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Glavinas H, von Richter O, Vojnits K, Mehn D, Wilhelm I, Nagy T, Janossy J, Krizbai I, Couraud P, Krajcsi P. Calcein assay: a high-throughput method to assess P-gp inhibition. Xenobiotica 2011; 41:712-9. [PMID: 21657832 DOI: 10.3109/00498254.2011.587033] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Transporter mediated drug-drug interactions (tDDI) mediated by ABCB1 have been shown to be clinically relevant. Hence, the assessment of the ABCB1 tDDI potential early in the drug development process has gained interest. We have evaluated the Calcein assay as a means of assessing the ABCB1 tDDI that is amenable to high throughout and compared it with the monolayer efflux assay. We found the Calcein assay, when performed in K562MDR cells using the protocol originally published more sensitive than digoxin transport inhibition in MDCKII-MDR1 cells. Application of the Calcein assay to cell lines containing different amounts of ABCB1, yielded IC(50) values that varied 10-100-fold. The differences observed for IC(50) values for the same compounds were in the following rank order: IC(50, MDCKII-MDR1) >IC(50, K562MDR)>IC(50, hCMEC/D3). Higher IC(50) values were obtained in cells with higher ABCB1 expression. The Calcein assay is a high-throughput alternative to digoxin transport inhibition as it appears to have a comparable selectivity but higher sensitivity than previously published digoxin transport inhibition in MDCKII-MDR1 cells. In addition, it can be performed in a barrier-specific manner highlighting the dependence of ABCB1 IC(50) values on different ABCB1 expression levels.
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Vojnits K, Bremer S. Challenges of using pluripotent stem cells for safety assessments of substances. Toxicology 2010; 270:10-7. [DOI: 10.1016/j.tox.2009.12.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2009] [Accepted: 12/03/2009] [Indexed: 01/02/2023]
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Buzanska L, Ruiz A, Ceriotti L, Sobanski T, Hogberg H, Morath S, Vojnits K, Zychowicz M, Whelan M, Colpo P, Rossi F, Coecke S. Stem cells in neurotoxicology: Human in vitro model combined with emerging technologies. Toxicol Lett 2008. [DOI: 10.1016/j.toxlet.2008.06.835] [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: 10/21/2022]
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