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Lemieux MR, Freigassner B, Hanson JL, Thathey Z, Opp MR, Hoeffer CA, Link CD. Multielectrode array characterization of human induced pluripotent stem cell derived neurons in co-culture with primary human astrocytes. PLoS One 2024; 19:e0303901. [PMID: 38917115 PMCID: PMC11198861 DOI: 10.1371/journal.pone.0303901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 05/02/2024] [Indexed: 06/27/2024] Open
Abstract
Human induced pluripotent stem cells (hiPSCs) derived into neurons offer a powerful in vitro model to study cellular processes. One method to characterize functional network properties of these cells is using multielectrode arrays (MEAs). MEAs can measure the electrophysiological activity of cellular cultures for extended periods of time without disruption. Here we used WTC11 hiPSCs with a doxycycline-inducible neurogenin 2 (NGN2) transgene differentiated into neurons co-cultured with primary human astrocytes. We achieved a synchrony index ∼0.9 in as little as six-weeks with a mean firing rate of ∼13 Hz. Previous reports show that derived 3D brain organoids can take several months to achieve similar strong network burst synchrony. We also used this co-culture to model aspects of blood-brain barrier breakdown by using human serum. Our fully human co-culture achieved strong network burst synchrony in a fraction of the time of previous reports, making it an excellent first pass, high-throughput method for studying network properties and neurodegenerative diseases.
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Affiliation(s)
- Maddie R. Lemieux
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
| | - Bernhard Freigassner
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
| | - Jessica L. Hanson
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
- Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, Colorado, United States of America
| | - Zahra Thathey
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
| | - Mark R. Opp
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
| | - Charles A. Hoeffer
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
- Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, Colorado, United States of America
| | - Christopher D. Link
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
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Lemieux MR, Freigassner B, Thathey Z, Opp MR, Hoeffer CA, Link CD. Multielectrode array characterization of human induced pluripotent stem cell derived neurons in co-culture with primary human astrocytes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.04.583341. [PMID: 38496655 PMCID: PMC10942372 DOI: 10.1101/2024.03.04.583341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Human induced pluripotent stem cells (hiPSCs) derived into neurons offer a powerful in vitro model to study cellular processes. One method to characterize functional network properties of these cells is using multielectrode arrays (MEAs). MEAs can measure the electrophysiological activity of cellular cultures for extended periods of time without disruption. Here we used WTC11 hiPSCs with a doxycycline-inducible neurogenin 2 (NGN2) transgene differentiated into neurons co-cultured with primary human astrocytes. We achieved a synchrony index ~0.9 in as little as six-weeks with a mean firing rate of ~13 Hz. Previous reports show that derived 3D brain organoids can take several months to achieve similar strong network burst synchrony. We also used this co-culture to model aspects of sporadic Alzheimer's disease by mimicking blood-brain barrier breakdown using a human serum. Our fully human co-culture achieved strong network burst synchrony in a fraction of the time of previous reports, making it an excellent first pass, high-throughput method for studying network properties and neurodegenerative diseases.
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Affiliation(s)
- Maddie R Lemieux
- Department of Integrative Physiology, University of Colorado Boulder
| | | | - Zahra Thathey
- Department of Integrative Physiology, University of Colorado Boulder
| | - Mark R Opp
- Department of Integrative Physiology, University of Colorado Boulder
| | - Charles A Hoeffer
- Department of Integrative Physiology, University of Colorado Boulder
- Institute for Behavioral Genetics, University of Colorado Boulder
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Sari N, Yanik Yalçin T, Erol Ç, Kurt Azap Ö, Arslan H, Karakaya E, Sezgin A, Haberal M. Evaluation of Candidemia in Solid-Organ Transplant Recipients. EXP CLIN TRANSPLANT 2024; 22:160-166. [PMID: 38385390 DOI: 10.6002/ect.mesot2023.o39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
OBJECTIVES Solid-organ transplant recipients have high rates of invasive fungal infections. Candida species are the most commonly isolated fungi. Our aim was to identify risk factors, clinical presentations, and outcomes of candidemia in solid-organ transplant recipients. MATERIALS AND METHODS We evaluated adult (≥18 years old) transplant recipients seen from May 2011 to December 2022 at Baskent University Ankara Hospital. From medical records, we retrospectively reviewed age, sex, transplant type, candidemia agent, risk factors, concomitant infections, and mortality of patients with Candida detected in blood culture. We used SPSS statistics software (version 25) to analyze data. RESULTS There were 1080 organ transplants performed during the study period (717 kidney, 279 liver, 84 heart). There were 855 who were ≥18 years (655 kidney, 127 liver, 73 heart), of whom candidemia was detected in 26 (16 male; 11 kidney, 11 liver, 4 heart) with a median age of 47.5 years. The most common agents were Candida albicans and Candida glabrata. The most common chronic diseases were hypertension, cirrhosis, and cardiomyopathy. Eighteen patients had a concomitant focus of infection. Ten patients had pneumonia accompanying candidemia. The 30-day mortality rate was as high as 53.8%. The mean duration of candidemia after transplant was 23 months. Catheter-related candidemia was observed in 65% of patients. The 30-day mortality was found to be significantly higher in patients followed in the intensive care unit (P = .014), receiving total parenteral nutrition (P = .001), using broad-spectrum antibiotics (P = .001), and having pneumonia (P = .042) accompanying candidemia. CONCLUSIONS For adult solid-organ transplant recipients with candidemia, careful monitoring is essential for successful management of total parenteral nutrition, central catheter, use of broadspectrum antibiotics, and invasive interventions.
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Affiliation(s)
- Nuran Sari
- From the Department of Infectious Disease and Clinical Microbiology, Baskent University Faculty of Medicine, Ankara, Turkey
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Krueger JM. Tripping on the edge of consciousness. SLEEP ADVANCES : A JOURNAL OF THE SLEEP RESEARCH SOCIETY 2023; 4:zpad039. [PMID: 37954093 PMCID: PMC10632728 DOI: 10.1093/sleepadvances/zpad039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Indexed: 11/14/2023]
Abstract
Herein the major accomplishments, trials and tribulations, and epiphanies experienced by James M. Krueger over the course of his career in sleep research are presented. They include the characterization of a) the supranormal EEG delta waves occurring during NREMS post sleep loss, b) Factor S as a muramyl peptide, c) the physiological roles of cytokines in sleep regulation, d) multiple other sleep regulatory substances, e) the dramatic changes in sleep over the course of infectious diseases, and f) sleep initiation within small neuronal/glial networks. The theory that the preservation of brain plasticity is the primordial sleep function is briefly discussed. These accomplishments resulted from collaborations with many outstanding scientists including James M. Krueger's mentors (John Pappenheimer and Manfred Karnovsky) and collaborators later in life, including Charles Dinarello, Louis Chedid, Mark Opp, Ferenc Obal jr., Dave Rector, Ping Taishi, Linda Toth, Jeannine Majde, Levente Kapas, Eva Szentirmai, Jidong Fang, Chris Davis, Sandip Roy, Tetsuya Kushikata, Fabio Garcia-Garcia, Ilia Karatsoreos, Mark Zielinski, and Alok De, plus many students, e.g. Jeremy Alt, Kathryn Jewett, Erika English, and Victor Leyva-Grado.
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Affiliation(s)
- James M Krueger
- Integrative Physiology and Neuroscience, College of Veterinary Medicine, Washington State University, USA
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Pan L, Wang Y, Guan R, Shi Q. Study on the active ingredients and mechanism of Jiaotai Pill in the treatment of primary insomnia based on network pharmacology and GEO statistics: A review. Medicine (Baltimore) 2023; 102:e35253. [PMID: 37747012 PMCID: PMC10519549 DOI: 10.1097/md.0000000000035253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/27/2023] [Accepted: 08/25/2023] [Indexed: 09/26/2023] Open
Abstract
OBJECTIVE To explore the active components and mechanism of Jiaotai Pill (JTP) in the treatment of primary insomnia (PI) based on gene expression omnibus. METHODS The main active components of Jiaotai Pills were obtained by TCMSP and literature mining, and the targets of the active components of Jiaotai Pills were predicted. The targets were verified and standardized by Uniprot database. PI-related targets were obtained from GeneCards, OMIM, DrugBank, PharmGKB, and TTD databases. Obtaining an intersection action target point of the Jiaotai pill and the PI by using a Venny diagram; Gene chip data (GSE208668) was downloaded from gene expression omnibus database, and then gene probe enrichment analysis (GSEA) was used to screen the differentially expressed genes between PI patients and normal controls, and molecular docking was used to virtually verify the screened differentially expressed genes with potential active compounds. RESULTS 21 active components and 263 potential targets of Jiaotai Pill were screened by database analysis and literature mining, 112 of which were intersected with PI. Molecular docking results showed that quercetin, EGCG, kaempferol, R-kanatin, stigmasterol, berberine and other core active components had good docking activity with related differential genes. CONCLUSION Jiaotai Pill can regulate the release of inflammatory factors through multiple active ingredients, multiple disease targets, multiple biological pathways and multiple pathways to achieve the purpose of treating PI, which provides a theoretical basis for the clinical treatment of PI and broadens the clinical use of Jiaotai Pill.
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Affiliation(s)
- Limin Pan
- The First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, Harbin, China
| | - Yaolei Wang
- Heilongjiang University of Traditional Chinese Medicine, Harbin, China
| | - Ruiqian Guan
- The First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, Harbin, China
| | - Qingchun Shi
- Heilongjiang University of Traditional Chinese Medicine, Harbin, China
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Zhu M, Huang H. The Underlying Mechanisms of Sleep Deprivation Exacerbating Neuropathic Pain. Nat Sci Sleep 2023; 15:579-591. [PMID: 37533626 PMCID: PMC10392808 DOI: 10.2147/nss.s414174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 07/25/2023] [Indexed: 08/04/2023] Open
Abstract
Pain disrupts sleep, and sleep deprivation or interference can alter pain perception in animals and humans, for example by increasing sensitivity to pain. However, the mechanism by which sleep affects neuropathic pain remains unclear. In this review, we discuss the available evidence from the epidemiologic, clinical, and human, as well as laboratory studies. In previous studies, we have found that sleep deprivation affects various injurious systems, including opioids, dopaminergic, immune, orexins, hypothalamic-pituitary-adrenal axis, and adenosine. At the same time, these systems play a crucial role in neuropathic pain regulation. In the complex interactions between these neurobiological systems, there may be potential regulatory pathways through which sleep deprivation amplifies neuropathic pain. Because of the impact sleep problems and neuropathic pain can have on the patients' quality of life, studying the link between sleep and neuropathic pain is important for neuropathic pain prevention and public health.
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Affiliation(s)
- Manmin Zhu
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, Guizhou, People’s Republic of China
| | - Hao Huang
- Department of Neurology, Affiliated Hospital of Zunyi Medical University, Guizhou, People’s Republic of China
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Liu J, Liu Y, Liu Y, Guo X, Lü Z, Zhou X, Liu H, Chi C. Molecular cloning, expression analysis and immune-related functional identification of tumor necrosis factor alpha (TNFα) in Sepiella japonica under bacteria stress. FISH & SHELLFISH IMMUNOLOGY 2023; 132:108509. [PMID: 36581254 DOI: 10.1016/j.fsi.2022.108509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/01/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Tumor necrosis factor α (TNFα), a cytokine mainly secreted by active macrophages and monocytes, causes hemorrhagic necrosis of tumor tissues, kills tumor cells, regulates inflammatory responses, and plays a crucial role in innate immunity. In this study, TNFα of Sepiella japonica (named as SjTNFα) was acquired, whose full-length cDNA was 1206 bp (GenBank accession no. ON357428), containing a 5' UTR of 185 bp, a 3' UTR of 137 bp and an open reading frame (ORF) of 1002bp to encode a putative peptide of 333 amino acids for constructing the transmembrane domain and the cytoplasmic TNF domain. Its predicted pI was 8.69 and the theoretical molecular weight was 44.72 KDa. Multiple sequence alignment and phylogenetic analysis showed that SjTNFα had the highest homology to Octopus sinensis, they fell into a unified branch and further clustered with other animals. Real-time PCR indicated that SjTNFα was widely expressed in all subject tissues, including spleen, pancreas, gill, heart, brain, optic lobe, liver and intestine, and exhibited the highest in the liver and the lowest in the brain. The relative expression of SjTNFα varied at the developmental period of juvenile stage, pre-spawning and oviposition in the squid, with the highest in the liver at the juvenile stage and oviposition, and in the optic lobe of pre-spawning. After being infected with Vibrio parahaemolyticus and Aeromonas hydrophila, the expression of SjTNFα in liver and gill were both upregulated with time, and the highest expression appeared at 24 h and 8 h in liver for different infection, and at 4 h in gill consistently. Cell localization showed that SjTNFα distributed on membrane of HEK293 cells because it was a type II soluble transmembrane protein. When HEK293 cells were stimulated with LPS of different concentrations, the NF-κB pathway was activated in the nucleus and the corresponding mRNA was transferred through the intracellular signal transduction pathway, resulting in the synthesis and release of TNFα, which made the expression of SjTNFα was up-regulated obviously. These findings showed that SjTNFα might play an essential role in the defense of S. japonica against bacteria challenge, which contributed to the understanding of the intrinsic immune signaling pathway of Cephalopoda and the further study of host-pathogen interactions.
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Affiliation(s)
- Jiaxin Liu
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Yue Liu
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Yongxin Liu
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Xiaoxian Guo
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Zhenming Lü
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Xu Zhou
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Huihui Liu
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China.
| | - Changfeng Chi
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, 316022, PR China.
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Garbarino S, Lanteri P, Bragazzi NL, Magnavita N, Scoditti E. Role of sleep deprivation in immune-related disease risk and outcomes. Commun Biol 2021; 4:1304. [PMID: 34795404 PMCID: PMC8602722 DOI: 10.1038/s42003-021-02825-4] [Citation(s) in RCA: 114] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 10/26/2021] [Indexed: 12/11/2022] Open
Abstract
Modern societies are experiencing an increasing trend of reduced sleep duration, with nocturnal sleeping time below the recommended ranges for health. Epidemiological and laboratory studies have demonstrated detrimental effects of sleep deprivation on health. Sleep exerts an immune-supportive function, promoting host defense against infection and inflammatory insults. Sleep deprivation has been associated with alterations of innate and adaptive immune parameters, leading to a chronic inflammatory state and an increased risk for infectious/inflammatory pathologies, including cardiometabolic, neoplastic, autoimmune and neurodegenerative diseases. Here, we review recent advancements on the immune responses to sleep deprivation as evidenced by experimental and epidemiological studies, the pathophysiology, and the role for the sleep deprivation-induced immune changes in increasing the risk for chronic diseases. Gaps in knowledge and methodological pitfalls still remain. Further understanding of the causal relationship between sleep deprivation and immune deregulation would help to identify individuals at risk for disease and to prevent adverse health outcomes.
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Affiliation(s)
- Sergio Garbarino
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences, University of Genoa, 16132, Genoa, Italy.
| | - Paola Lanteri
- Neurophysiology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Nicola Luigi Bragazzi
- Laboratory for Industrial and Applied Mathematics (LIAM), Department of Mathematics and Statistics, York University, Toronto, ON, M3J 1P3, Canada
| | - Nicola Magnavita
- Postgraduate School of Occupational Medicine, Università Cattolica del Sacro Cuore, 00168, Rome, Italy
- Department of Woman/Child and Public Health, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168, Rome, Italy
| | - Egeria Scoditti
- National Research Council (CNR), Institute of Clinical Physiology (IFC), 73100, Lecce, Italy
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