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Weber K, Domènech A, Kegler K, Kreutzer R, Mayoral FJ, Okazaki Y, Ortega P, Polledo L, Razinger T, Richard OK, Sanchez R, Warfving N, Vallejo R, de Miguel R. Onset and progression of postmortem histological changes in the central nervous system of RccHan ™: WIST rats. Front Vet Sci 2024; 11:1378609. [PMID: 38835889 PMCID: PMC11149423 DOI: 10.3389/fvets.2024.1378609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/22/2024] [Indexed: 06/06/2024] Open
Abstract
Death initiates a cascade of physiological and biochemical alterations in organs and tissues, resulting in microscopic changes that challenge the histopathological evaluation. Moreover, the brain is particularly susceptible to artifacts owing to its unique composition and its location within the cranial vault. The aim of this study was to compile and illustrate the microscopic changes in the central nervous system (CNS) of rats subjected to delayed postmortem fixation. It also scrutinizes the influence of exsanguination and cooling methods on the initiation and progression of these alterations. Twenty-four Wistar Han outbred rats (RccHan™: WIST) were sacrificed and stored either at room temperature (18-22°C) or under refrigeration (2-4°C). Necropsies were conducted at different time points postmortem (i.e., 0.5 h, 1 h, 4 h, 8 h, 12 h, 24 h, 36 h, 48 h, 7 days and 14 days). Brain sections underwent simultaneous digital evaluation by 14 pathologists until a consensus was reached on terminology, key findings, and intensity levels. Microscopic observations varied among cell types. Glial cells were similarly affected throughout the CNS and showed pericellular halo, chromatin condensation and nuclear shrinkage. Neurons showed two types of postmortem changes as most of them showed progressive shrinkage, cytoplasmic dissolution and karyorrhexis whereas others acquired a dark-neuron-like appearance. Neuronal changes showed marked differences among neuroanatomical locations. Additional postmortem changes encompassed: granulation and microcavitation in neuropil and white matter; retraction spaces; detachment of ependyma, choroid plexus, and leptomeninges. Severity of findings after 48 h at room temperature was higher than after seven days under refrigeration and similar to or slightly lower than after 14 days under refrigeration. No clear differences were observed related to the sex or weight of the animals or their exsanguination status. This work elucidates the onset and progression of autolytic changes in the brains of Wistar Han rats, offering insights to accurately identify and enhance the histopathological evaluation.
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Rodrigues RB, de Oliveira MM, Garcia FP, Ueda-Nakamura T, de Oliveira Silva S, Nakamura CV. Dithiothreitol reduces oxidative stress and necrosis caused by ultraviolet A radiation in L929 fibroblasts. Photochem Photobiol Sci 2024; 23:271-284. [PMID: 38305951 DOI: 10.1007/s43630-023-00516-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 11/23/2023] [Indexed: 02/03/2024]
Abstract
Ultraviolet A (UVA) radiation, present in sunlight, can induce cell redox imbalance leading to cellular damage and even cell death, compromising skin health. Here, we evaluated the in vitro antioxidant and photochemoprotective effect of dithiothreitol (DTT). DTT neutralized the free radicals 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS·+), 2,2-diphenyl-1-picrylhydrazyl (DPPH·), and superoxide anion (O2·-) in in vitro assays, as well as the ferric ion (Fe3+) in the ferric reducing antioxidant power (FRAP) assay. We also evaluated the effect of DTT pre-treatment in L929 dermal fibroblasts and DTT (50 and 100 µM) led to greater cell viability following UVA-irradiation compared to cells that were untreated. Furthermore, the pre-treatment of cells with DTT prevented the increase of intracellular reactive oxygen species (ROS) production, including hydrogen peroxide (H2O2), lipid peroxidation, and DNA condensation, as well as the decrease in mitochondrial membrane potential (Δψm), that occurred following irradiation in untreated cells. The endogenous antioxidant system of cells was also improved in irradiated cells that were DTT pre-treated compared to the untreated cells, as the activity of the superoxide dismutase (SOD) and catalase (CAT) enzymes remained as high as non-irradiated cells, while the activity levels were depleted in the untreated irradiated cells. Furthermore, DTT reduced necrosis in UVA-irradiated fibroblasts. Together, these results showed that DTT may have promising use in the prevention of skin photoaging and photodamage induced by UVA, as it provided photochemoprotection against the harmful effects of this radiation, reducing oxidative stress and cell death, due mainly to its antioxidant capacity.
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Affiliation(s)
- Renata Bufollo Rodrigues
- Biological Sciences Post-graduation Program, Maringá State University, Av. Colombo, n. 5790, Zona 7, Maringá, Paraná, CEP 87020-900, Brazil
| | | | - Francielle Pelegrin Garcia
- Biological Sciences Post-graduation Program, Maringá State University, Av. Colombo, n. 5790, Zona 7, Maringá, Paraná, CEP 87020-900, Brazil
| | - Tânia Ueda-Nakamura
- Pharmaceutical Sciences Post-graduation Program, Maringá State University, Maringá, Brazil
| | | | - Celso Vataru Nakamura
- Biological Sciences Post-graduation Program, Maringá State University, Av. Colombo, n. 5790, Zona 7, Maringá, Paraná, CEP 87020-900, Brazil.
- Pharmaceutical Sciences Post-graduation Program, Maringá State University, Maringá, Brazil.
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Zlatar L, Mahajan A, Muñoz-Becerra M, Weidner D, Bila G, Bilyy R, Titze J, Hoffmann MH, Schett G, Herrmann M, Steffen U, Muñoz LE, Knopf J. Suppression of neutrophils by sodium exacerbates oxidative stress and arthritis. Front Immunol 2023; 14:1174537. [PMID: 37600805 PMCID: PMC10433750 DOI: 10.3389/fimmu.2023.1174537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 07/14/2023] [Indexed: 08/22/2023] Open
Abstract
Introduction Typical Western diet, rich in salt, contributes to autoimmune disease development. However, conflicting reports exist about the effect of salt on neutrophil effector functions, also in the context of arthritis. Methods We investigated the effect of sodium chloride (NaCl) on neutrophil viability and functions in vitro, and in vivo employing the murine K/BxN-serum transfer arthritis (STA) model. Results and discussion The effects of NaCl and external reactive oxygen species (H2O2) were further examined on osteoclasts in vitro. Hypertonic sodium-rich media caused primary/secondary cell necrosis, altered the nuclear morphology, inhibited phagocytosis, degranulation, myeloperoxidase (MPO) peroxidation activity and neutrophil extracellular trap (NET) formation, while increasing total ROS production, mitochondrial ROS production, and neutrophil elastase (NE) activity. High salt diet (HSD) aggravated arthritis by increasing inflammation, bone erosion, and osteoclast differentiation, accompanied by increased NE expression and activity. Osteoclast differentiation was decreased with 25 mM NaCl or 100 nM H2O2 addition to isotonic media. In contrast to NaCl, external H2O2 had pro-resorptive effects in vitro. We postulate that in arthritis under HSD, increased bone erosion can be attributed to an enhanced oxidative milieu maintained by infiltrating neutrophils, rather than a direct effect of NaCl.
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Affiliation(s)
- Leticija Zlatar
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Aparna Mahajan
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Marco Muñoz-Becerra
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Daniela Weidner
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Galyna Bila
- Department of Histology, Cytology, Embryology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Rostyslav Bilyy
- Department of Histology, Cytology, Embryology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Jens Titze
- Division of Nephrology and Hypertension, Universitätsklinikum Erlangen, Erlangen, Germany
- Programme in Cardiovascular and Metabolic Disorders, Duke-NUS Medical School, Singapore, Singapore
| | - Markus H. Hoffmann
- Department of Dermatology, Allergology, and Venereology, University of Lübeck, Lübeck, Germany
| | - Georg Schett
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Martin Herrmann
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Ulrike Steffen
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Luis E. Muñoz
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Jasmin Knopf
- Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany
- Deutsches Zentrum für Immuntherapie (DZI), Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
- Department of Pediatric Surgery, University Medical Center Mannheim, University of Heidelberg, Mannheim, Germany
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Khalil MI, Agamy AF, Elshewemi SS, Sultan AS, Abdelmeguid NE. Pterostilbene induces apoptosis in hepatocellular carcinoma cells: Biochemical, pathological, and molecular markers. Saudi J Biol Sci 2023; 30:103717. [PMID: 37483838 PMCID: PMC10359945 DOI: 10.1016/j.sjbs.2023.103717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/13/2023] [Accepted: 06/23/2023] [Indexed: 07/25/2023] Open
Abstract
Worldwide, hepatocellular carcinoma (HCC) is considered the sixth most prevalent cancer and ranked third in causes leading to death. Pterostilbene (PTE), a dimethylated analog of resveratrol, is a phytochemical found in fruits such as blueberries and grapes, and is known for its anticancer effect. The current study intended to investigate the effect of PTE on HepG2 cells. Cell viability, colony-forming potential, lipid peroxidation, catalase enzyme (CAT), superoxide dismutase (SOD), and caspase 3 activities, histone release, and expression levels of mTOR, S6K1, p53, and STAT3 proteins were assessed in PTE-treated HepG2 cells. In addition, the cellular and ultrastructural alterations were evaluated by light and transmission electron microscopy. PTE induced a significant reduction in HepG2 viability in a dose-dependent manner (IC50 of PTE = 74 ± 6 μM), accompanied by a decrease in colony formation potential. PTE-treated cancer cells exhibited a decrease in lipid peroxidation and CAT activity, and an increase in histone release, caspase-3, and SOD activities. Ultrastructurally, PTE-treated cells exhibited notable cell shrinkage, reduced number of filopodia, increased vacuolization, apoptotic bodies, accumulation of lipid droplets, enlarged mitochondria, dilated endoplasmic reticulum, pyknotic nuclei, and cellular fragmentation. mTOR, S6K1, and STAT3 levels were downregulated, however p53 level was modulated in PTE-treated cells. The anticancer potential of PTE might be related to its ability to alter the ultrastructure morphology, reduce mitotic activity, and modulate some key protein required for cell proliferation, suggesting its potential to trigger cancer cells towards apoptosis.
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Affiliation(s)
- Mahmoud I. Khalil
- Department of Biological Sciences, Faculty of Science, Beirut Arab University, Lebanon
- Molecular Biology Unit, Zoology Department, Faculty of Science, Alexandria University, Egypt
| | - Alaa F. Agamy
- Molecular Biology Unit, Zoology Department, Faculty of Science, Alexandria University, Egypt
| | | | - Ahmed S. Sultan
- Biochemistry Department, Faculty of Science, Alexandria University, Egypt
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Eraso-Ordoñez JF, Yee-Duarte JA, Roldán-Wong NT, García-Ulloa M, Góngora-Gómez AM, Arellano-Martínez M. Histopathological alterations in the gonads of wild white clams Dosinia ponderosa inhabiting a former copper mine locality in the Gulf of California. JOURNAL OF AQUATIC ANIMAL HEALTH 2023. [PMID: 37243331 DOI: 10.1002/aah.10184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 03/03/2023] [Accepted: 03/07/2023] [Indexed: 05/28/2023]
Abstract
OBJECTIVE Prolonged exposure to heavy metals, such as Pb, Hg, or Cu, has multiple adverse effects on marine organisms at the cellular, physiological, and population levels. Bivalves' histopathology provides a sensitive biomarker of pollutant-induced stress and environmental health. Gonad tissue deterioration is of particular concern, as it affects the reproductive success of a species. This study aimed to examine the histopathological alterations caused by metal exposure in the gonad of the white clam Dosinia ponderosa. METHODS Organisms were sampled from three locations in the Gulf of California: Santa Rosalia (SR), a former Cu mining town; San Lucas beach (SL), a nearby site influenced by pollution; and Escondida beach (EB), which served as a control site. Histological and histochemical stains were used, and the prevalence and intensity level of each alteration were calculated. RESULT The prevalence of alterations was higher in the ovaries of SR clams (92% compared to 60% in SL clams and 32.7% in EB clams), during spawning (91.4% compared to 20% in SL clams and 4.7% in EB clams), and in winter (93.5% compared to 30% in SL clams and 17.4% in EB clams). CONCLUSION These findings suggest a significant deterioration in the gonads of white clams from SR, probably linked to the chronic exposure to high concentrations of Cu and possibly other heavy metals; hence, the reproductive health of the clams is likely compromised.
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Affiliation(s)
- Jessica F Eraso-Ordoñez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
| | - Josué Alonso Yee-Duarte
- Universidad Autónoma de Baja California Sur, Departamento Académico de Ciencias Marinas y Costeras, La Paz, Baja California Sur, Mexico
| | - Nefertiti Taydé Roldán-Wong
- Universidad Autónoma de Baja California Sur, Departamento Académico de Ciencias Marinas y Costeras, La Paz, Baja California Sur, Mexico
| | - Manuel García-Ulloa
- Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Sinaloa, Guasave, Sinaloa, Mexico
| | - Andrés M Góngora-Gómez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, Unidad Sinaloa, Guasave, Sinaloa, Mexico
| | - Marcial Arellano-Martínez
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico
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Wang S, Linsley JW, Linsley DA, Lamstein J, Finkbeiner S. Fluorescently labeled nuclear morphology is highly informative of neurotoxicity. FRONTIERS IN TOXICOLOGY 2022; 4:935438. [PMID: 36093369 PMCID: PMC9449453 DOI: 10.3389/ftox.2022.935438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 07/27/2022] [Indexed: 11/16/2022] Open
Abstract
Neurotoxicity can be detected in live microscopy by morphological changes such as retraction of neurites, fragmentation, blebbing of the neuronal soma and ultimately the disappearance of fluorescently labeled neurons. However, quantification of these features is often difficult, low-throughput, and imprecise due to the overreliance on human curation. Recently, we showed that convolutional neural network (CNN) models can outperform human curators in the assessment of neuronal death from images of fluorescently labeled neurons, suggesting that there is information within the images that indicates toxicity but that is not apparent to the human eye. In particular, the CNN's decision strategy indicated that information within the nuclear region was essential for its superhuman performance. Here, we systematically tested this prediction by comparing images of fluorescent neuronal morphology from nuclear-localized fluorescent protein to those from freely diffused fluorescent protein for classifying neuronal death. We found that biomarker-optimized (BO-) CNNs could learn to classify neuronal death from fluorescent protein-localized nuclear morphology (mApple-NLS-CNN) alone, with super-human accuracy. Furthermore, leveraging methods from explainable artificial intelligence, we identified novel features within the nuclear-localized fluorescent protein signal that were indicative of neuronal death. Our findings suggest that the use of a nuclear morphology marker in live imaging combined with computational models such mApple-NLS-CNN can provide an optimal readout of neuronal death, a common result of neurotoxicity.
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Affiliation(s)
- Shijie Wang
- Center for Systems and Therapeutics, Gladstone Institutes, San Francisco, CA, United States
| | - Jeremy W. Linsley
- Center for Systems and Therapeutics, Gladstone Institutes, San Francisco, CA, United States
| | - Drew A. Linsley
- Robert J. and Nancy D. Carney Institute for Brain Science, Brown University, Providence, RI, United States
- Department of Cognitive, Linguistic and Psychological Sciences, Brown University, Providence, RI, United States
| | - Josh Lamstein
- Center for Systems and Therapeutics, Gladstone Institutes, San Francisco, CA, United States
| | - Steven Finkbeiner
- Center for Systems and Therapeutics, Gladstone Institutes, San Francisco, CA, United States
- Taube/Koret Center for Neurodegenerative Disease, Gladstone Institutes, San Francisco, CA, United States
- Departments of Neurology and Physiology, University of California, San Francisco, San Francisco, CA, United States
- Neuroscience Graduate Program, University of California, San Francisco, San Francisco, CA, United States
- Biomedical Sciences Graduate Program, University of California, San Francisco, San Francisco, CA, United States
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Gunay G, Hamsici S, Lang GA, Lang ML, Kovats S, Acar H. Peptide Aggregation Induced Immunogenic Rupture (PAIIR). ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105868. [PMID: 35599386 PMCID: PMC9313945 DOI: 10.1002/advs.202105868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 04/06/2022] [Indexed: 05/11/2023]
Abstract
Immunogenic cell death (ICD) arises when cells are under stress, and their membranes are damaged. They release damage-associated molecular patterns (DAMPs) that stimulate and drive the type and magnitude of the immune response. In the presence of an antigen, DAMPs ride the longevity and efficacy of antigen-specific immunity. Yet, no tool can induce the controlled ICD with predictable results. A peptide-based tool, [II], is designed that aggregates in the cell and causes cell membrane damage, generates ICD and DAMPs release on various cell types, and hence can act as an adjuvant. An influenza vaccine is prepared by combining [II] with influenza hemagglutinin (HA) subunit antigens. The results show that [II] induced significantly higher HA-specific immunoglobulin G1 (IgG1) and IgG2a antibodies than HA-only immunized mice, while the peptide itself did not elicit antibodies. This paper demonstrates the first peptide-aggregation induced immunogenic rupture (PAIIR) approach as a vaccine adjuvant. PAIIR is a promising adjuvant with a high potential to promote universal protection upon influenza HA vaccination.
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Affiliation(s)
- Gokhan Gunay
- Stephenson School of Biomedical EngineeringUniversity of OklahomaNormanOK73069USA
| | - Seren Hamsici
- Stephenson School of Biomedical EngineeringUniversity of OklahomaNormanOK73069USA
| | - Gillian A. Lang
- Department of Microbiology and ImmunologyUniversity of Oklahoma Health Sciences CenterOklahoma CityOK73104USA
| | - Mark L. Lang
- Department of Microbiology and ImmunologyUniversity of Oklahoma Health Sciences CenterOklahoma CityOK73104USA
| | - Susan Kovats
- Department of Microbiology and ImmunologyUniversity of Oklahoma Health Sciences CenterOklahoma CityOK73104USA
- Arthritis & Clinical Immunology ProgramOklahoma Medical Research FoundationOklahoma CityOK73104USA
| | - Handan Acar
- Stephenson School of Biomedical EngineeringUniversity of OklahomaNormanOK73069USA
- Stephenson Cancer CenterUniversity of Oklahoma Health Sciences CenterOklahoma CityOK73104USA
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Moreira DR, de Souza THS, Galhardo D, Puentes SMD, Figueira CL, Silva BGD, Chagas FD, Gigliolli AAS, de Toledo VDAA, Ruvolo-Takasusuki MCC. Imidacloprid Induces Histopathological Damage in the Midgut, Ovary, and Spermathecal Stored Spermatozoa of Queens After Chronic Colony Exposure. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:1637-1648. [PMID: 35344213 DOI: 10.1002/etc.5332] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 02/18/2022] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
Bee colony health is declining as a result of several factors, including exposure to pesticides. The development and strength of honey bee colonies depend on the reproductive success of queen bees. Because flowers are sources of food for bees, foragers can accidentally collect and carry contaminated pollen and nectar to their hives; and this may compromise the longevity and the life span of individuals. Thus, the present study aimed to observe the action of imidacloprid in the midgut and ovaries of Apis mellifera queens, as well as the effects on sperm stored in their spermatheca. To this end, the apiary was divided into three experimental groups: control, commercial imidacloprid, and active ingredient imidacloprid. For toxicity assays, a sucrose solution containing 1 µg/L of imidacloprid was offered to the colonies for 42 days. A control group received only food in the same period. In both treatments with imidacloprid, the midgut of queens showed modifications in the external musculature and cellular alterations. Such changes could lead to the nonrecovery of the epithelium and subsequently malabsorption of nutrients. Moreover, the digestive cells of queen bees exposed to the commercial imidacloprid presented pyknotic nuclei, suggesting a cell death process. The main alterations observed in the ovaries of these reproductive bees treated with commercial imidacloprid were degeneration and resorption of the ovariole content, which probably affected their fertilization and colony development. There were no significant changes in the spermatozoa morphology for both treatments with imidacloprid, but this insecticide may interfere with the development and reproductive success of A. mellifera colonies because it affects the morphology and function of essential organs for the survival of queens. Environ Toxicol Chem 2022;41:1637-1648. SETAC.
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Affiliation(s)
- Daiani Rodrigues Moreira
- Department of Biotechnology, Genetics and Cell Biology, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | | | - Douglas Galhardo
- Department of Animal Science, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | | | - Cinthia Leão Figueira
- Department of Animal Science, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Breno Gabriel da Silva
- Department of Exact Sciences, Escola Superior de Agricultura "Luiz de Queiroz"-Universidade de São Paulo, Piracicaba, São Paulo, Brazil
| | - Francieli das Chagas
- Department of Biotechnology, Genetics and Cell Biology, Universidade Estadual de Maringá, Maringá, Paraná, Brazil
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The apoptosis of grass carp (Ctenopharyngodon idella) muscle during postmortem condition regulated by the cytokines via TOR and NF-κB signaling pathways. Food Chem 2022; 369:130911. [PMID: 34455325 DOI: 10.1016/j.foodchem.2021.130911] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/17/2021] [Accepted: 08/17/2021] [Indexed: 11/23/2022]
Abstract
Postmortem alteration by apoptosis has significant effects on flesh quality. Currently, the information necessary to understand the apoptotic behavior and the molecular mechanisms during postmortem alteration in fish muscle is still lacking. Activation of apoptosis and the cytokines involved in regulating apoptosis in fish muscle were evaluated during postmortem condition at 4 °C for 5 days in terms of apoptotic morphology changes, nucleus DNA fragmentation, caspases activation and related gene expressions. The triggering apoptotic mechanisms associated with multiple cytokines transcriptional levels showed that the up-regulated pro-apoptotic mediators [IFN-γ2, TNF-α, IL-6, IL-1β, IL-17D, IL-12p35 and IL-10 (except IL-15)] and the down-regulated anti-apoptotic mediators of [IL-8 and IL-11 (except TGF-β and IL-4)] both regulated apoptosis at early stage, which were regulated by NF-κB and TOR, respectively. Results suggested that transcriptional regulation of multiple cytokines produce a positive outcome on triggering apoptosis.
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Zacouteguy AMB, Limberger GM, de Oliveira PSC, da Fonseca DB, Bruch GE, Barros DM. The adverse effects of injected functionalized multi-walled carbon nanotube (f-MWCNT) on in vivo neurosecretory brain cells of Jamaican field cricket, Gryllus assimilis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:66968-66977. [PMID: 34244942 DOI: 10.1007/s11356-021-15308-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Carbon nanotubes (CNTs) have been increasingly more prevalent due to their use in product technology owing to their exceptional electrical and thermal conductivity and tensile strength because of their nanostructure and strength of the bonds among carbon atoms. The potential increase of CNTs in the environment is a concern, and studies to assess the toxic effects of these nanomaterials (NMs) are needed. However, so far, most of the studies are focused on aquatic species and much less is understood about the effects of NM in terrestrial organisms. This investigation used a functionalized multi-walled carbon nanotube (f-MWCNT) and the Jamaican cricket Gryllus assimilis to assess the effects of this NM. Cricket nymphs were injected with f-MWCNT suspension-at three different concentrations. The insecticide Fipronil was used as a positive control. Survival was monitored, and histological analysis was made in the brains. Pyknotic cells were quantified in two brain regions, a neurosecretory called Pars intercerebralis (PI), and an associative region called mushroom body (MB). No mortality was observed in any f-MWCNT concentration tested. A significant increase in pyknotic cells was observed as sub-lethal effect for the intermediate concentration of f-MWCNT, at PI, while any significant change was observed at the Kenyon cells of the MB. These results are discussed in the context of agglomeration and dispersion of the f-MWCNT at different concentrations, and availability of the f-MWCNT on the circulatory system, as well as the natural decay of pyknotic cells with time and different patterns of adult cricket neurogenesis. Our results showed that f-MWCNT had negative effects in the neurosecretory region of the brain.
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Affiliation(s)
- Aline Maciel Bueno Zacouteguy
- Programa de Pós-Graduação em Ciências Fisiológicas, Universidade Federal do Rio Grande, Av. Itália, km 8, Rio Grande, RS, 96203-001, Brazil
| | - Guilherme Martins Limberger
- Programa de Pós-Graduação em Ciências Fisiológicas, Universidade Federal do Rio Grande, Av. Itália, km 8, Rio Grande, RS, 96203-001, Brazil
| | | | | | - Gisele Eva Bruch
- Departamento de Física/ICEx, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Daniela Martí Barros
- Programa de Pós-Graduação em Ciências Fisiológicas, Universidade Federal do Rio Grande, Av. Itália, km 8, Rio Grande, RS, 96203-001, Brazil.
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11
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Manna I, Mishra S, Bandyopadhyay M. In vivo genotoxicity assessment of nickel oxide nanoparticles in the model plant Allium cepa L. THE NUCLEUS 2021. [DOI: 10.1007/s13237-021-00377-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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12
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Santra P, Amack JD. Loss of vacuolar-type H+-ATPase induces caspase-independent necrosis-like death of hair cells in zebrafish neuromasts. Dis Model Mech 2021; 14:dmm048997. [PMID: 34296747 PMCID: PMC8319552 DOI: 10.1242/dmm.048997] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 06/15/2021] [Indexed: 01/24/2023] Open
Abstract
The vacuolar-type H+-ATPase (V-ATPase) is a multi-subunit proton pump that regulates cellular pH. V-ATPase activity modulates several cellular processes, but cell-type-specific functions remain poorly understood. Patients with mutations in specific V-ATPase subunits can develop sensorineural deafness, but the underlying mechanisms are unclear. Here, we show that V-ATPase mutations disrupt the formation of zebrafish neuromasts, which serve as a model to investigate hearing loss. V-ATPase mutant neuromasts are small and contain pyknotic nuclei that denote dying cells. Molecular markers and live imaging show that loss of V-ATPase induces mechanosensory hair cells in neuromasts, but not neighboring support cells, to undergo caspase-independent necrosis-like cell death. This is the first demonstration that loss of V-ATPase can lead to necrosis-like cell death in a specific cell type in vivo. Mechanistically, loss of V-ATPase reduces mitochondrial membrane potential in hair cells. Modulating the mitochondrial permeability transition pore, which regulates mitochondrial membrane potential, improves hair cell survival. These results have implications for understanding the causes of sensorineural deafness, and more broadly, reveal functions for V-ATPase in promoting survival of a specific cell type in vivo.
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Affiliation(s)
- Peu Santra
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Jeffrey D. Amack
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
- BioInspired Syracuse: Institute for Material and Living Systems, Syracuse, NY 13244, USA
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13
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Majtnerova P, Capek J, Petira F, Handl J, Rousar T. Quantitative spectrofluorometric assay detecting nuclear condensation and fragmentation in intact cells. Sci Rep 2021; 11:11921. [PMID: 34099803 PMCID: PMC8184882 DOI: 10.1038/s41598-021-91380-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/21/2021] [Indexed: 12/17/2022] Open
Abstract
At present, nuclear condensation and fragmentation have been estimated also using Hoechst probes in fluorescence microscopy and flow cytometry. However, none of the methods used the Hoechst probes for quantitative spectrofluorometric assessment. Therefore, the aim of the present study was to develop a spectrofluorometric assay for detection of nuclear condensation and fragmentation in the intact cells. We used human hepatoma HepG2 and renal HK-2 cells cultured in 96-well plates treated with potent apoptotic inducers (i.e. cisplatin, staurosporine, camptothecin) for 6-48 h. Afterwards, the cells were incubated with Hoechst 33258 (2 µg/mL) and the increase of fluorescence after binding of the dye to DNA was measured. The developed spectrofluorometric assay was capable to detect nuclear changes caused by all tested apoptotic inducers. Then, we compared the outcomes of the spectrofluorometric assay with other methods detecting cell impairment and apoptosis (i.e. WST-1 and glutathione tests, TUNEL, DNA ladder, caspase activity, PARP-1 and JNKs expressions). We found that our developed spectrofluorometric assay provided results of the same sensitivity as the TUNEL assay but with the advantages of being fast processing, low-cost and a high throughput. Because nuclear condensation and fragmentation can be typical markers of cell death, especially in apoptosis, we suppose that the spectrofluorometric assay could become a routinely used method for characterizing cell death processes.
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Affiliation(s)
- Pavlina Majtnerova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Jan Capek
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Filip Petira
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Jiri Handl
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Tomas Rousar
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic.
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14
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Minina EA, Dauphinee AN, Ballhaus F, Gogvadze V, Smertenko AP, Bozhkov PV. Apoptosis is not conserved in plants as revealed by critical examination of a model for plant apoptosis-like cell death. BMC Biol 2021; 19:100. [PMID: 33980238 PMCID: PMC8117276 DOI: 10.1186/s12915-021-01018-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 04/01/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Animals and plants diverged over one billion years ago and evolved unique mechanisms for many cellular processes, including cell death. One of the most well-studied cell death programmes in animals, apoptosis, involves gradual cell dismantling and engulfment of cellular fragments, apoptotic bodies, through phagocytosis. However, rigid cell walls prevent plant cell fragmentation and thus apoptosis is not applicable for executing cell death in plants. Furthermore, plants are devoid of the key components of apoptotic machinery, including phagocytosis as well as caspases and Bcl-2 family proteins. Nevertheless, the concept of plant "apoptosis-like programmed cell death" (AL-PCD) is widespread. This is largely due to superficial morphological resemblances between plant cell death and apoptosis, and in particular between protoplast shrinkage in plant cells killed by various stimuli and animal cell volume decrease preceding fragmentation into apoptotic bodies. RESULTS Here, we provide a comprehensive spatio-temporal analysis of cytological and biochemical events occurring in plant cells subjected to heat shock at 40-55 °C and 85 °C, the experimental conditions typically used to trigger AL-PCD and necrotic cell death, respectively. We show that cell death under both conditions was not accompanied by membrane blebbing or formation of apoptotic bodies, as would be expected during apoptosis. Instead, we observed instant and irreversible permeabilization of the plasma membrane and ATP depletion. These processes did not depend on mitochondrial functionality or the presence of Ca2+ and could not be prevented by an inhibitor of ferroptosis. We further reveal that the lack of protoplast shrinkage at 85 °C, the only striking morphological difference between cell deaths induced by 40-55 °C or 85 °C heat shock, is a consequence of the fixative effect of the high temperature on intracellular contents. CONCLUSIONS We conclude that heat shock-induced cell death is an energy-independent process best matching definition of necrosis. Although the initial steps of this necrotic cell death could be genetically regulated, classifying it as apoptosis or AL-PCD is a terminological misnomer. Our work supports the viewpoint that apoptosis is not conserved across animal and plant kingdoms and demonstrates the importance of focusing on plant-specific aspects of cell death pathways.
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Affiliation(s)
- Elena A Minina
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, P.O. Box 7015, SE-750 07, Uppsala, Sweden.
- COS, Heidelberg University, Im Neuenheimer Feld 230, 69120, Heidelberg, Germany.
| | - Adrian N Dauphinee
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, P.O. Box 7015, SE-750 07, Uppsala, Sweden
| | - Florentine Ballhaus
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, P.O. Box 7015, SE-750 07, Uppsala, Sweden
| | - Vladimir Gogvadze
- Institute of Environmental Medicine, Division of Toxicology, Karolinska Institutet, Box 210, SE-171 77, Stockholm, Sweden
- Faculty of Medicine, MV Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Andrei P Smertenko
- Institute of Biological Chemistry, College of Human, Agricultural, and Natural Resource Sciences, Washington State University, Pullman, WA, 99164, USA
| | - Peter V Bozhkov
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, P.O. Box 7015, SE-750 07, Uppsala, Sweden.
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15
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The Phenoxyphenol Compound diTFPP Mediates Exogenous C 2-Ceramide Metabolism, Inducing Cell Apoptosis Accompanied by ROS Formation and Autophagy in Hepatocellular Carcinoma Cells. Antioxidants (Basel) 2021; 10:antiox10030394. [PMID: 33807856 PMCID: PMC7998835 DOI: 10.3390/antiox10030394] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/23/2021] [Accepted: 02/23/2021] [Indexed: 01/15/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a severe disease that accounts for 80% of liver cancers. Chemotherapy is the primary therapeutic strategy for patients who cannot be treated with surgery or who have late-stage HCC. C2-ceramide is an effective reagent that has been found to inhibit the growth of many cancer types. The metabolism of C2-ceramide plays a vital role in the regulation of cell death/cell survival. The phenoxyphenol compound 4-{2,3,5,6-tetrafluoro-4-[2,3,5,6-tetrafluoro-4-(4-hydroxyphenoxy)phenyl]phenoxy}phenol (diTFPP) was found to have a synergistic effect with C2-ceramide, resulting in considerable cell death in the HA22T HCC cell line. diTFPP/C2-ceramide cotreatment induced a two- to threefold increase in cell death compared to that with C2-ceramide alone and induced pyknosis. Annexin V/7-aminoactinomycin D (7AAD) double staining and Western blotting indicated that apoptosis was involved in diTFPP/C2-ceramide cotreatment-mediated cell death. We next analyzed transcriptome alterations in diTFPP/C2-ceramide-cotreated HA22T cells with next-generation sequencing (NGS). The data indicated that diTFPP treatment disrupted sphingolipid metabolism, inhibited cell cycle-associated gene expression, and induced autophagy and reactive oxygen species (ROS)-responsive changes in gene expression. Additionally, we assessed the activation of autophagy with acridine orange (AO) staining and observed alterations in the expression of the autophagic proteins LC3B-II and Beclin-1, which indicated autophagy activation after diTFPP/C2-ceramide cotreatment. Elevated levels of ROS were also reported in diTFPP/C2-ceramide-treated cells, and the expression of the ROS-associated proteins SOD1, SOD2, and catalase was upregulated after diTFPP/C2-ceramide treatment. This study revealed the potential regulatory mechanism of the novel compound diTFPP in sphingolipid metabolism by showing that it disrupts ceramide metabolism and apoptotic sphingolipid accumulation.
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16
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Filgueiras-Rama D, Vasilijevic J, Jalife J, Noujaim SF, Alfonso JM, Nicolas-Avila JA, Gutierrez C, Zamarreño N, Hidalgo A, Bernabé A, Cop CP, Ponce-Balbuena D, Guerrero-Serna G, Calle D, Desco M, Ruiz-Cabello J, Nieto A, Falcon A. Human influenza A virus causes myocardial and cardiac-specific conduction system infections associated with early inflammation and premature death. Cardiovasc Res 2021; 117:876-889. [PMID: 32346730 PMCID: PMC7898948 DOI: 10.1093/cvr/cvaa117] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/27/2020] [Accepted: 04/22/2020] [Indexed: 12/20/2022] Open
Abstract
AIMS Human influenza A virus (hIAV) infection is associated with important cardiovascular complications, although cardiac infection pathophysiology is poorly understood. We aimed to study the ability of hIAV of different pathogenicity to infect the mouse heart, and establish the relationship between the infective capacity and the associated in vivo, cellular and molecular alterations. METHODS AND RESULTS We evaluated lung and heart viral titres in mice infected with either one of several hIAV strains inoculated intranasally. 3D reconstructions of infected cardiac tissue were used to identify viral proteins inside mouse cardiomyocytes, Purkinje cells, and cardiac vessels. Viral replication was measured in mouse cultured cardiomyocytes. Human-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) were used to confirm infection and study underlying molecular alterations associated with the in vivo electrophysiological phenotype. Pathogenic and attenuated hIAV strains infected and replicated in cardiomyocytes, Purkinje cells, and hiPSC-CMs. The infection was also present in cardiac endothelial cells. Remarkably, lung viral titres did not statistically correlate with viral titres in the mouse heart. The highly pathogenic human recombinant virus PAmut showed faster replication, higher level of inflammatory cytokines in cardiac tissue and higher viral titres in cardiac HL-1 mouse cells and hiPSC-CMs compared with PB2mut-attenuated virus. Correspondingly, cardiac conduction alterations were especially pronounced in PAmut-infected mice, associated with high mortality rates, compared with PB2mut-infected animals. Consistently, connexin43 and NaV1.5 expression decreased acutely in hiPSC-CMs infected with PAmut virus. YEM1L protease also decreased more rapidly and to lower levels in PAmut-infected hiPSC-CMs compared with PB2mut-infected cells, consistent with mitochondrial dysfunction. Human IAV infection did not increase myocardial fibrosis at 4-day post-infection, although PAmut-infected mice showed an early increase in mRNAs expression of lysyl oxidase. CONCLUSION Human IAV can infect the heart and cardiac-specific conduction system, which may contribute to cardiac complications and premature death.
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Affiliation(s)
- David Filgueiras-Rama
- Cardiac Electrophysiology Unit, Hospital Clínico San Carlos,
Madrid, Spain
- Centro Nacional de Investigaciones Cardiovasculares (CNIC),
Madrid, Spain
- Consortium CIBER of Cardiovascular Diseases (CIBERCV), Spain
| | - Jasmina Vasilijevic
- Department of Molecular and Cellular Biology, National Center for
Biotechnology, Spanish National Research Council, Madrid, Spain
- Consortium CIBER of Respiratory Diseases, Spain
| | - Jose Jalife
- Centro Nacional de Investigaciones Cardiovasculares (CNIC),
Madrid, Spain
- Consortium CIBER of Cardiovascular Diseases (CIBERCV), Spain
- Center for Arrhythmia Research, Health System, University of
Michigan, MI, USA
| | - Sami F Noujaim
- Morsani College of Medicine Molecular Pharmacology & Physiology, University
of South Florida, Tampa, FL, USA
| | - Jose M Alfonso
- Centro Nacional de Investigaciones Cardiovasculares (CNIC),
Madrid, Spain
| | | | - Celia Gutierrez
- Department of Molecular and Cellular Biology, National Center for
Biotechnology, Spanish National Research Council, Madrid, Spain
| | - Noelia Zamarreño
- Department of Molecular and Cellular Biology, National Center for
Biotechnology, Spanish National Research Council, Madrid, Spain
| | - Andres Hidalgo
- Centro Nacional de Investigaciones Cardiovasculares (CNIC),
Madrid, Spain
| | - Alejandro Bernabé
- Centro Nacional de Investigaciones Cardiovasculares (CNIC),
Madrid, Spain
| | | | | | | | - Daniel Calle
- Centro Nacional de Investigaciones Cardiovasculares (CNIC),
Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid,
Spain
| | - Manuel Desco
- Centro Nacional de Investigaciones Cardiovasculares (CNIC),
Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid,
Spain
- Department of Bioengineering and Aerospace Engineering, University Carlos III
of Madrid, Madrid, Spain
- Consortium CIBER of Mental Health (CIBERSAM), Spain
| | - Jesus Ruiz-Cabello
- Consortium CIBER of Respiratory Diseases, Spain
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque
Research and Technology Alliance (BRTA), San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, Spain
- Universidad Complutense Madrid, Madrid, Spain
| | - Amelia Nieto
- Department of Molecular and Cellular Biology, National Center for
Biotechnology, Spanish National Research Council, Madrid, Spain
- Consortium CIBER of Respiratory Diseases, Spain
| | - Ana Falcon
- Department of Molecular and Cellular Biology, National Center for
Biotechnology, Spanish National Research Council, Madrid, Spain
- Consortium CIBER of Respiratory Diseases, Spain
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17
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Martín MJ, Azcona P, Lassalle V, Gentili C. Doxorubicin delivery by magnetic nanotheranostics enhances the cell death in chemoresistant colorectal cancer-derived cells. Eur J Pharm Sci 2020; 158:105681. [PMID: 33347979 DOI: 10.1016/j.ejps.2020.105681] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/12/2020] [Accepted: 12/14/2020] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is a major cause of cancer death with a high probability of treatment failure. Doxorubicin (DOXO) is an efficient antitumor drug; however, most CRC cells show resistance to its effects. Magnetic nanoparticles (MNPs) are potential cancer management tools that can serve as diagnostic agents and also can optimize and personalize treatments. This work aims to evaluate the aptitude of magnetic nanotheranostics composed of magnetite (Fe3O4) nanoparticles coated with folic acid intended to the sustained release of DOXO. The administration of DOXO by means of these MNPs resulted in the enhancement of cell death respect to the free drug administration. Chromatin compaction and cytoplasmic protrusions were observed. Mitochondrial transmembrane potential disruption and increased PARP protein cleavage confirmed apoptosis. The nanosystem was also tested as a vectoring tool by exposing it to the stimuli of a static magnetic field in vitro. CRC-related magnetic nanotechnology still remains in pre-clinical trials. In this context, this contribution expands the knowledge of the behavior of MNPs in contact with in vitro models and proposes the nanodevices studied here as potential theranostic agents for the monitoring of the progress of CRC and the evolution of its treatment.
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Affiliation(s)
- María Julia Martín
- INBIOSUR, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS)-CONICET, San Juan 671, 8000, Bahía Blanca, Argentina.; INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Av. Alem 1253, 8000 Bahía Blanca, Argentina
| | - Pamela Azcona
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Av. Alem 1253, 8000 Bahía Blanca, Argentina
| | - Verónica Lassalle
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Av. Alem 1253, 8000 Bahía Blanca, Argentina
| | - Claudia Gentili
- INBIOSUR, Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS)-CONICET, San Juan 671, 8000, Bahía Blanca, Argentina..
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18
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Burkholderia pseudomallei as an Enteric Pathogen: Identification of Virulence Factors Mediating Gastrointestinal Infection. Infect Immun 2020; 89:IAI.00654-20. [PMID: 33106293 DOI: 10.1128/iai.00654-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 10/15/2020] [Indexed: 12/24/2022] Open
Abstract
Burkholderia pseudomallei is a Gram-negative bacterium and the causative agent of melioidosis. Despite advances in our understanding of the disease, B. pseudomallei poses a significant health risk, especially in regions of endemicity, where treatment requires prolonged antibiotic therapy. Even though the respiratory and percutaneous routes are well documented and considered the main ways to acquire the pathogen, the gastrointestinal tract is believed to be an underreported and underrecognized route of infection. In the present study, we describe the development of in vitro and in vivo models to study B. pseudomallei gastrointestinal infection. Further, we report that the type 6 secretion system (T6SS) and type 1 fimbriae are important virulence factors required for gastrointestinal infection. Using a human intestinal epithelial cell line and mouse primary intestinal epithelial cells (IECs), we demonstrated that B. pseudomallei adheres, invades, and forms multinucleated giant cells, ultimately leading to cell toxicity. We demonstrated that mannose-sensitive type 1 fimbria is involved in the initial adherence of B. pseudomallei to IECs, although the impact on full virulence was limited. Finally, we also showed that B. pseudomallei requires a functional T6SS for full virulence, bacterial dissemination, and lethality in mice infected by the intragastric route. Overall, we showed that B. pseudomallei is an enteric pathogen and that type 1 fimbria is important for B. pseudomallei intestinal adherence, and we identify a new role for T6SS as a key virulence factor in gastrointestinal infection. These studies highlight the importance of gastrointestinal melioidosis as an understudied route of infection and open a new avenue for the pathogenesis of B. pseudomallei.
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19
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Unnikannan CP, Reuveny A, Grunberg D, Volk T. Recruitment of BAF to the nuclear envelope couples the LINC complex to endoreplication. Development 2020; 147:dev.191304. [PMID: 33168584 PMCID: PMC7758627 DOI: 10.1242/dev.191304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 10/29/2020] [Indexed: 12/21/2022]
Abstract
DNA endoreplication has been implicated as a cell strategy for cell growth and in tissue injury. Here, we demonstrate that barrier-to-autointegration factor (BAF) represses endoreplication in Drosophila myofibers. We show that BAF localization at the nuclear envelope is eliminated in flies with mutations of the linker of nucleoskeleton and cytoskeleton (LINC) complex in which the LEM-domain protein Otefin is excluded, or after disruption of the nucleus-sarcomere connections. Furthermore, BAF localization at the nuclear envelope requires the activity of the BAF kinase VRK1/Ball, and, consistently, non-phosphorylatable BAF-GFP is excluded from the nuclear envelope. Importantly, removal of BAF from the nuclear envelope correlates with increased DNA content in the myonuclei. E2F1, a key regulator of endoreplication, overlaps BAF localization at the myonuclear envelope, and BAF removal from the nuclear envelope results in increased E2F1 levels in the nucleoplasm and subsequent elevated DNA content. We suggest that LINC-dependent and phosphosensitive attachment of BAF to the nuclear envelope, through its binding to Otefin, tethers E2F1 to the nuclear envelope thus inhibiting its accumulation in the nucleoplasm. Summary: Localization of BAF at the nuclear envelope of myonuclei depends on a functional LINC complex and on nucleus-sarcomere connections, and is shown to restrict E2F1 levels in the nucleoplasm.
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Affiliation(s)
- C P Unnikannan
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Adriana Reuveny
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Dvorah Grunberg
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Talila Volk
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel
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20
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Rellmann Y, Eidhof E, Dreier R. Review: ER stress-induced cell death in osteoarthritic cartilage. Cell Signal 2020; 78:109880. [PMID: 33307190 DOI: 10.1016/j.cellsig.2020.109880] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/16/2022]
Abstract
In cartilage, chondrocytes are responsible for the biogenesis and maintenance of the extracellular matrix (ECM) composed of proteins, glycoproteins and proteoglycans. Various cellular stresses, such as hypoxia, nutrient deprivation, oxidative stress or the accumulation of advanced glycation end products (AGEs) during aging, but also translational errors or mutations in cartilage components or chaperone proteins affect the synthesis and secretion of ECM proteins, causing protein aggregates to accumulate in the endoplasmic reticulum (ER). This condition, referred to as ER stress, interferes with cartilage cell homeostasis and initiates the unfolded protein response (UPR), a rescue mechanism to regain cell viability and function. Chronic or irreversible ER stress, however, triggers UPR-initiated cell death. Due to unresolved ER stress in chondrocytes, diseases of the skeletal system, such as chondrodysplasias, arise. ER stress has also been identified as a contributing factor to the pathogenesis of cartilage degeneration processes such as osteoarthritis (OA). This review provides current knowledge about the biogenesis of ECM components in chondrocytes, describes possible causes for the impairment of involved processes and focuses on the ER stress-induced cell death in articular cartilage during OA. Targeting of the ER stress itself or intervention in UPR signaling to reduce death of chondrocytes may be promising for future osteoarthritis therapy.
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Affiliation(s)
- Yvonne Rellmann
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Münster, Germany
| | - Elco Eidhof
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Münster, Germany
| | - Rita Dreier
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Münster, Germany.
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21
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Louwagie EJ, Larsen TD, Wachal AL, Gandy TCT, Eclov JA, Rideout TC, Kern KA, Cain JT, Anderson RH, Mdaki KS, Baack ML. Age and Sex Influence Mitochondria and Cardiac Health in Offspring Exposed to Maternal Glucolipotoxicity. iScience 2020; 23:101746. [PMID: 33225249 PMCID: PMC7666357 DOI: 10.1016/j.isci.2020.101746] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/29/2020] [Accepted: 10/24/2020] [Indexed: 02/07/2023] Open
Abstract
Infants of diabetic mothers are at risk of cardiomyopathy at birth and myocardial infarction in adulthood, but prevention is hindered because mechanisms remain unknown. We previously showed that maternal glucolipotoxicity increases the risk of cardiomyopathy and mortality in newborn rats through fuel-mediated mitochondrial dysfunction. Here we demonstrate ongoing cardiometabolic consequences by cross-fostering and following echocardiography, cardiomyocyte bioenergetics, mitochondria-mediated turnover, and cell death following metabolic stress in aged adults. Like humans, cardiac function improves by weaning with no apparent differences in early adulthood but declines again in aged diabetes-exposed offspring. This is preceded by impaired oxidative phosphorylation, exaggerated age-related increase in mitochondrial number, and higher oxygen consumption. Prenatally exposed male cardiomyocytes have more mitolysosomes indicating high baseline turnover; when exposed to metabolic stress, mitophagy cannot increase and cardiomyocytes have faster mitochondrial membrane potential loss and mitochondria-mediated cell death. Details highlight age- and sex-specific roles of mitochondria in developmentally programmed adult heart disease. Fetal exposures disrupt mitochondria, bioenergetics, & cardiac function at birth First, bioenergetics & function improve until greater reliance on OXPHOS with age At 6MO, poor respiration incites biogenesis & mitophagy, and then functional decline Fetal exposures cause faster mitochondria-mediated cell death in aged adult hearts
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Affiliation(s)
- Eli J Louwagie
- University of South Dakota Sanford School of Medicine, Sioux Falls, SD 57105, USA.,Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Tricia D Larsen
- Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Angela L Wachal
- Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Tyler C T Gandy
- Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Julie A Eclov
- Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Todd C Rideout
- Department of Exercise and Nutrition Sciences, State University of New York, Buffalo, NY 14214, USA
| | - Katherine A Kern
- Department of Exercise and Nutrition Sciences, State University of New York, Buffalo, NY 14214, USA
| | - Jacob T Cain
- Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Ruthellen H Anderson
- University of South Dakota Sanford School of Medicine, Sioux Falls, SD 57105, USA.,Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Kennedy S Mdaki
- Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA
| | - Michelle L Baack
- University of South Dakota Sanford School of Medicine, Sioux Falls, SD 57105, USA.,Environmental Influences on Health and Disease Group, Sanford Research, Sioux Falls, SD 57104, USA.,Boekelheide Neonatal Intensive Care Unit, Sanford Children's Hospital, Sioux Falls, SD 57117, USA
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22
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El-Ashmawy NE, Al-Ashmawy GM, Fakher HE, Khedr NF. The role of WNT/β-catenin signaling pathway and glutamine metabolism in the pathogenesis of CCl 4-induced liver fibrosis: Repositioning of niclosamide and concerns about lithium. Cytokine 2020; 136:155250. [PMID: 32882667 DOI: 10.1016/j.cyto.2020.155250] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND Liver fibrosis is a serious health problem which may lead to advanced liver cirrhosis and hepatocellular carcinoma. OBJECTIVE The present study aimed to investigate the role of Wnt/β-catenin signaling pathway and glutamine aminohydrolase enzyme (l-glutaminase) in the pathogenesis of liver fibrosis and the potential benefits of niclosamide in treating liver fibrosis. METHODS Ninety male Albino rats were divided into 6 equal groups (n = 15) as follows: a normal control group (NC), CCl4-only treated group (Fib.) which received 1 mg/kg CCl4 two times weekly, niclosamide-treated group (Niclo.) which received 5 mg/kg of niclosamide one time daily, lithium chloride-treated group (LiCl) which received 100 mg/kg of LiCl one time daily, niclosamide-and-CCl4-treated group (Niclo. + Fib.) which received same doses of niclosamide and CCl4 given to other groups, and finally lithium chloride-and-CCl4-treated rat group (LiCl + Fib.) which received same doses of LiCl and CCl4 given to other groups. All treatments were administered orally for 8 weeks. Liver tissue was assessed for l-hydroxyproline, beta-catenin (β-catenin), l-glutaminase activity, as well as the gene expression of transforming growth factor beta-1 (TGF-β1) and Dishevelled-2 (Dvl2). Histopathological and immunohistochemical analyses of alpha smooth muscle actin α-SMA were performed. Serum alanine transaminase (ALT), aspartate transaminase (AST), and total bilirubin were measured. RESULTS The group of niclosamide-and-CCl4-treated rats showed a significant decrease in total bilirubin, ALT and AST, β-catenin, l-hydroxyproline, l-glutaminase activity, and gene expression of TGF-β1 and Dvl2. Moreover, the liver tissue in this group of rats showed mild α-SMA reactivity compared with the rats treated with CCl4 only (fibrosis group). On the other hand, lithium chloride-and-CCl4-treated rats showed a significant increase in liver indices, TGF-β1 expression, β-catenin, l-hydroxyproline, and l-glutaminase activity with severe α-SMA reactivity and apoptosis in the liver tissue. CONCLUSIONS Niclosamide protected rats against liver fibrosis by inhibiting the Wnt/β-catenin pathway and glutaminolysis.
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Affiliation(s)
- Nahla E El-Ashmawy
- Department of Biochemistry, Faculty of Pharmacy, Tanta University, Postal code: 31527, Egypt
| | - Ghada M Al-Ashmawy
- Department of Biochemistry, Faculty of Pharmacy, Tanta University, Postal code: 31527, Egypt
| | - Hoda E Fakher
- Department of Biochemistry, Faculty of Pharmacy, Menoufia University, Postal code: 32511, Egypt.
| | - Naglaa F Khedr
- Department of Biochemistry, Faculty of Pharmacy, Tanta University, Postal code: 31527, Egypt
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23
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Teoh SQ, Yap MKK. Naja sumatrana venom cytotoxin, sumaCTX exhibits concentration-dependent cytotoxicity via caspase-activated mitochondrial-mediated apoptosis without transitioning to necrosis. TOXIN REV 2020. [DOI: 10.1080/15569543.2020.1799408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shun Qi Teoh
- School of Science, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Michelle Khai Khun Yap
- School of Science, Monash University Malaysia, Bandar Sunway, Malaysia
- Tropical Medicine and Biology Platform, Monash University Malaysia, Bandar Sunway, Malaysia
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24
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Tanaka Y, Nakagomi N, Doe N, Nakano-Doi A, Sawano T, Takagi T, Matsuyama T, Yoshimura S, Nakagomi T. Early Reperfusion Following Ischemic Stroke Provides Beneficial Effects, Even After Lethal Ischemia with Mature Neural Cell Death. Cells 2020; 9:cells9061374. [PMID: 32492968 PMCID: PMC7349270 DOI: 10.3390/cells9061374] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 12/29/2022] Open
Abstract
Ischemic stroke is a critical disease caused by cerebral artery occlusion in the central nervous system (CNS). Recent therapeutic advances, such as neuroendovascular intervention and thrombolytic therapy, have allowed recanalization of occluded brain arteries in an increasing number of stroke patients. Although previous studies have focused on rescuing neural cells that still survive despite decreased blood flow, expanding the therapeutic time window may allow more patients to undergo reperfusion in the near future, even after lethal ischemia, which is characterized by death of mature neural cells, such as neurons and glia. However, it remains unclear whether early reperfusion following lethal ischemia results in positive outcomes. The present study used two ischemic mouse models—90-min transient middle cerebral artery occlusion (t-MCAO) paired with reperfusion to induce lethal ischemia and permanent middle cerebral artery occlusion (p-MCAO)—to investigate the effect of early reperfusion up to 8 w following MCAO. Although early reperfusion following 90-min t-MCAO did not rescue mature neural cells, it preserved the vascular cells within the ischemic areas at 1 d following 90-min t-MCAO compared to that following p-MCAO. In addition, early reperfusion facilitated the healing processes, including not only vascular but also neural repair, during acute and chronic periods and improved recovery. Furthermore, compared with p-MCAO, early reperfusion after t-MCAO prevented behavioral symptoms of neurological deficits without increasing negative complications, including hemorrhagic transformation and mortality. These results indicate that early reperfusion provides beneficial effects presumably via cytoprotective and regenerative mechanisms in the CNS, suggesting that it may be useful for stroke patients that experienced lethal ischemia.
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Affiliation(s)
- Yasue Tanaka
- Department of Neurosurgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan; (Y.T.); (T.T.)
| | - Nami Nakagomi
- Department of Surgical Pathology, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan;
| | - Nobutaka Doe
- General Education Center, Hyogo University of Health Sciences, 1-3-6 Minatojima, Chuo-ku, Kobe, Hyogo 650-8530, Japan;
| | - Akiko Nakano-Doi
- Institute for Advanced Medical Sciences, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan;
- Department of Therapeutic Progress in Brain Diseases, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan;
| | - Toshinori Sawano
- Department of Biomedical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan;
| | - Toshinori Takagi
- Department of Neurosurgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan; (Y.T.); (T.T.)
| | - Tomohiro Matsuyama
- Department of Therapeutic Progress in Brain Diseases, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan;
| | - Shinichi Yoshimura
- Department of Neurosurgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan; (Y.T.); (T.T.)
- Institute for Advanced Medical Sciences, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan;
- Correspondence: (S.Y.); (T.N.); Tel.: +81-798-45-6455 (S.Y.); +81-798-45-6821 (T.N.)
| | - Takayuki Nakagomi
- Institute for Advanced Medical Sciences, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan;
- Department of Therapeutic Progress in Brain Diseases, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663-8501, Japan;
- Correspondence: (S.Y.); (T.N.); Tel.: +81-798-45-6455 (S.Y.); +81-798-45-6821 (T.N.)
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25
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Afkhami-Poostchi A, Mashreghi M, Iranshahi M, Matin MM. Use of a genetically engineered E. coli overexpressing β-glucuronidase accompanied by glycyrrhizic acid, a natural and anti-inflammatory agent, for directed treatment of colon carcinoma in a mouse model. Int J Pharm 2020; 579:119159. [PMID: 32081798 DOI: 10.1016/j.ijpharm.2020.119159] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/13/2020] [Accepted: 02/16/2020] [Indexed: 12/24/2022]
Abstract
Bacteria-directed enzyme prodrug therapy (BDEPT), is an emerging alternative directed and tumor-specific approach. The basis of this method is the conversion of a non-toxic prodrug by a bacterial enzyme to a toxic drug within the tumor-microenvironment (TME). In the present study, the therapeutic efficacy of BDEPT was investigated based on the ability of Escherichia coli DH5α-lux/βG in activation of glycyrrhizic acid (GL), a natural and non-toxic compound purified from licorice, to glycyrrhetinic acid (GA) only in TME. To do so, the anti-bacterial effects of GL on bacteria and the cytotoxic effects of the produced GA on survival rate of CT26 mouse colon carcinoma cells were evaluated. The IC50 values of the produced GA and cisplatin were determined as 210 μM and 100 μM, respectively. Comparing these values to GL treatment (1305 μM) indicates that bacteria could have efficiently activated GL to GA to inhibit the growth of tumor cells. Afterward, the anti-cancer effects of bacteria used in combination with GL was investigated in a mouse model of colon carcinoma. Results were indicative of targeted homing and even proliferation of luminescent bacteria in TME. Moreover, combined treatment greatly inhibited tumor growth. Histopathological analysis of dissected tissues also demonstrated increased apoptosis rate in tumor cells after combined treatment and interestingly, showed no obvious damage to the spleen and liver of treated mice. Accordingly, this BDEPT approach could be considered as an effective alternative tumor-specific therapy utilizing prodrug-activating enzymes expressing from tumor-targeting bacteria to allow the development of new tumor-specific pharmacotherapy protocols.
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Affiliation(s)
- Amin Afkhami-Poostchi
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mansour Mashreghi
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran; Industrial Biotechnology Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran; Center of Nano Research, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mehrdad Iranshahi
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran; Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam M Matin
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran; Novel Diagnostics and Therapeutics Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran.
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26
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Akhtar MJ, Ahamed M, Alhadlaq H, Alrokayan S. Toxicity Mechanism of Gadolinium Oxide Nanoparticles and Gadolinium Ions in Human Breast Cancer Cells. Curr Drug Metab 2019; 20:907-917. [DOI: 10.2174/1389200220666191105113754] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 10/03/2019] [Accepted: 10/16/2019] [Indexed: 12/19/2022]
Abstract
Background:
Due to the potential advantages of Gadolinium Nanoparticles (NPs) over gadolinium elements,
gadolinium based NPs are currently being explored in the field of MRI. Either in elemental form or nanoparticulate
form, gadolinium toxicity is believed to occur due to the deposition of gadolinium ion (designated as Gd3+ ion
or simply G ion).
Objective:
There is a serious lack of literature on the mechanisms of toxicity caused by either gadolinium-based NPs
or ions. Breast cancer tumors are often subjected to MRIs, therefore, human breast cancer (MCF-7) cells could serve
as an appropriate in vitro model for the study of Gadolinium Oxide (GO) NP and G ion.
Methods:
Cytotoxicity and oxidative damage was determined by quantifying cell viability, cell membrane damage,
and Reactive Oxygen Species (ROS). Intracellular Glutathione (GSH) was measured along with cellular Total Antioxidant
Capacity (TAC). Autophagy was determined by using Monodansylcadaverine (MDC) and Lysotracker Red
(LTR) dyes in tandem. Mitochondrial Membrane Potential (MMP) was measured by JC-1 fluorescence. Physicochemical
properties of GO NPs were characterized by field emission transmission electron microscopy, X-ray diffraction,
and energy dispersive spectrum.
Results:
A time- and concentration-dependent toxicity and oxidative damage was observed due to GO NPs and G
ions. Bax/Bcl2 ratios, FITC-7AAD double staining, and cell membrane blebbing in phase-contrast images all suggested
different modes of cell death induced by NPs and ions.
Conclusion:
In summary, cell death induced by GO NPs with high aspect ratio favored apoptosis-independent cell
death, whereas G ions favored apoptosis-dependent cell death.
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Affiliation(s)
- Mohd Javed Akhtar
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia
| | - Maqusood Ahamed
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia
| | - Hisham Alhadlaq
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Saudi Arabia
| | - Salman Alrokayan
- Department of Biochemistry, College of Sciences, King Saud University, Riyadh, Saudi Arabia
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27
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Alfonso-Almazán JM, Quintanilla JG, García-Torrent MJ, Laguna-Castro S, Rodríguez-Bobada C, González P, González-Ferrer JJ, Salinas P, Cañadas-Godoy V, Moreno J, Borrego-Bernabé L, Pérez-Castellano N, Jalife J, Perez-Villacastín J, Filgueiras-Rama D. Lesion Index Titration Using Contact-Force Technology Enables Safe and Effective Radiofrequency Lesion Creation at the Root of the Aorta and Pulmonary Artery. Circ Arrhythm Electrophysiol 2019; 12:e007080. [PMID: 30879334 PMCID: PMC6426438 DOI: 10.1161/circep.118.007080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Ablation of some myocardial substrates requires catheter-based radiofrequency delivery at the root of a great artery. We studied the safety and efficacy parameters associated with catheter-based radiofrequency delivery at the root of the aorta and pulmonary artery. METHODS Thirty-six pigs underwent in-vivo catheter-based ablation under continuous contact-force and lesion index (power, contact-force, and time) monitoring during 60-s radiofrequency delivery with an open-irrigated tip catheter. Twenty-eight animals were allocated to groups receiving 40 W (n=9), 50 W (n=10), or 60 W (n=9) radiofrequency energy, and acute (n=22) and chronic (n=6) arterial wall damage was quantified by multiphoton microscopy in ex vivo samples. Adjacent myocardial lesions were quantified in parallel samples. The remaining 8 pigs were used to validate safety and efficacy parameters. RESULTS Acute collagen and elastin alterations were significantly associated with radiofrequency power, although chronic assessment revealed vascular wall recovery in lesions without steam pop. The main parameters associated with steam pops were median peak temperature >42°C and impedance falls >23 ohms. Unlike other parameters, lesion index values of 9.1 units (interquartile range, 8.7-9.8) were associated with the presence of adjacent myocardial lesions in both univariate ( P=0.03) and multivariate analyses ( P=0.049; odds ratio, 1.99; 95% CI, 1.02-3.98). In the validation group, lesion index values using 40 W over a range of contact-forces correlated with the size of radiofrequency lesions (R2=0.57; P=0.03), with no angiographic or histopathologic signs of coronary artery damage. CONCLUSIONS Lesion index values obtained during 40 W radiofrequency applications reliably monitor safe and effective lesion creation at the root of the great arteries.
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Affiliation(s)
- José Manuel Alfonso-Almazán
- Centro Nacional de Investigaciones Cardiovasculares, Carlos III (CNIC), Myocardial Pathophysiology Area (J.M.A.-A., J.G.Q., S.L.-C., J.J., D.F.-R.)
| | - Jorge G Quintanilla
- Centro Nacional de Investigaciones Cardiovasculares, Carlos III (CNIC), Myocardial Pathophysiology Area (J.M.A.-A., J.G.Q., S.L.-C., J.J., D.F.-R.).,Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.).,CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.)
| | | | - Santiago Laguna-Castro
- Centro Nacional de Investigaciones Cardiovasculares, Carlos III (CNIC), Myocardial Pathophysiology Area (J.M.A.-A., J.G.Q., S.L.-C., J.J., D.F.-R.)
| | - Cruz Rodríguez-Bobada
- Experimental Medicine and Surgery Unit, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (C.R.-B., P.G.)
| | - Pablo González
- Experimental Medicine and Surgery Unit, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (C.R.-B., P.G.)
| | - Juan José González-Ferrer
- Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.).,CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.)
| | - Pablo Salinas
- Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.)
| | - Victoria Cañadas-Godoy
- Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.).,CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.)
| | - Javier Moreno
- CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.).,Hospital Universitario Ramón y Cajal, Department of Cardiology, Madrid, Spain (J.M.)
| | - Luis Borrego-Bernabé
- Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.)
| | - Nicasio Pérez-Castellano
- Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.).,CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.)
| | - José Jalife
- Centro Nacional de Investigaciones Cardiovasculares, Carlos III (CNIC), Myocardial Pathophysiology Area (J.M.A.-A., J.G.Q., S.L.-C., J.J., D.F.-R.).,CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.).,Center for Arrhythmia Research, Cardiovascular Research Center, Department of Internal Medicine, University of Michigan, Ann Arbor (J.J.)
| | - Julián Perez-Villacastín
- Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.).,CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.).,Fundación Interhospitalaria para la Investigación Cardiovascular (FIC) (M.J.G.-T., J.P.-V.)
| | - David Filgueiras-Rama
- Centro Nacional de Investigaciones Cardiovasculares, Carlos III (CNIC), Myocardial Pathophysiology Area (J.M.A.-A., J.G.Q., S.L.-C., J.J., D.F.-R.).,Cardiovascular Institute, Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC) (J.G.Q., J.J.G.-F., P.S., V.C.-G., L.B.-B., N.P.-C., J.P.-V.).,CIBER de Enfermedades Cardiovasculares (J.G.Q., J.J.G.-F., V.C.-G., J.M., N.P.-C., J.J., J.P.-V., D.F.-R.)
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Hasan MF, Ghiasvand S, Wang H, Miwa JM, Berdichevsky Y. Neural layer self-assembly in geometrically confined rat and human 3D cultures. Biofabrication 2019; 11:045011. [PMID: 31247598 DOI: 10.1088/1758-5090/ab2d3f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Neurological disorders affect millions of Americans and this number is expected to rise with the aging population. Development of drugs to treat these disorders may be facilitated by improved in vitro models that faithfully reproduce salient features of the relevant brain regions. Current 3D culture methods face challenges with reliably reproducing microarchitectural features of brain morphology such as cortical or hippocampal layers. In this work, polydimethylsiloxane (PDMS) mini-wells were used to create low aspect ratio, adherent 3D constructs where neurons self-assemble into layers. Layer self-assembly was determined to depend on the size of the PDMS mini-well. Layer formation occurred in cultures composed of primary rat cortical neurons or human induced pluripotent stem cell-derived neurons and astrocytes and was robust and reproducible. Layered 3D constructs were found to have spontaneous neural activity characterized by long bursts similar to activity in the developing cortex. The responses of layered 3D cultures to drugs were more similar to in vivo data than those of 2D cultures. 3D constructs created with this method may be thus suitable as in vitro models for drug discovery for neurological disorders.
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Affiliation(s)
- Md Fayad Hasan
- Department of Electrical and Computer Engineering, Lehigh University, Bethlehem, PA 18015, United States of America
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29
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Zhang J, Ahmad S, Wang LY, Han Q, Zhang JC, Luo YP. Cell death induced by α-terthienyl via reactive oxygen species-mediated mitochondrial dysfunction and oxidative stress in the midgut of Aedes aegypti larvae. Free Radic Biol Med 2019; 137:87-98. [PMID: 31022448 DOI: 10.1016/j.freeradbiomed.2019.04.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 04/14/2019] [Accepted: 04/16/2019] [Indexed: 12/13/2022]
Abstract
α-Terthienyl (α-T) is a photosensitizer that produces many reactive oxygen species (ROS) under ultraviolet light. Here, we aimed to evaluate the oxidation mechanism of the 25%, 50%, and 75% lethal concentrations in Aedes aegypti larvae; the lethal concentration of α-T was used as the test value. The effects on mitochondria, oxidative stress, and cell death patterns caused by ROS were evaluated. The results showed that α-T mainly produced large amounts of ROS in the midgut of larvae. Moreover, mitochondrial ROS were increased in midgut cells, and the production of ROS sites, such as complex enzymes, was inhibited, resulting in enhanced production of ROS. Ultrastructural analysis of mitochondria revealed significant vacuolation, decreased activity of tricarboxylic acid cycle enzymes, and reduced ATP content and mitochondrial membrane potential in the high concentration group compared with those in the control group. Additionally, mitochondrial biosynthesis was blocked in the high concentration group. Thus, exposure to α-T disrupted mitochondrial function, although the mitochondrial DNA content may have increased because of mitochondrial self-protection mechanisms against oxidative stress. Furthermore, high concentrations of α-T aggravated oxidative stress and increased the number of intracellular oxidative damage products. Reverse transcription polymerase chain reaction and fluorescence staining showed that ROS induced by low α-T concentrations upregulated apoptotic genes, including Dronc (P < 0.05), thereby promoting apoptosis. Moderate concentrations of α-T promoted autophagy through induction of ROS, inhibited apoptosis, and induced necrosis. In contrast, high α-T concentrations induced high levels of ROS, which caused mitochondrial dysfunction and increased cytoplasmic Ca2+ concentration, directly inducing cell necrosis. We also found that α-T may disrupt the permeability of the peritrophic membrane, leading to intestinal barrier dysfunction. These results provided insights into the mode of action of α-T in Aedes aegypti.
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Affiliation(s)
- Jie Zhang
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Hainan University, Ministry of Education, Haikou, Hainan 570228, PR China
| | - Shakil Ahmad
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Hainan University, Ministry of Education, Haikou, Hainan 570228, PR China
| | - Lan-Ying Wang
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Hainan University, Ministry of Education, Haikou, Hainan 570228, PR China
| | - Qian Han
- The Laboratory of Tropical Animal Medicine and Vector Biology, Hainan University, Haikou, Hainan 570228, PR China
| | - Jian-Chun Zhang
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Hainan University, Ministry of Education, Haikou, Hainan 570228, PR China
| | - Yan-Ping Luo
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Hainan University, Ministry of Education, Haikou, Hainan 570228, PR China.
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Akang EN, Dosumu OO, Afolayan OO, Fagoroye AM, Osiagwu DD, Usman IT, Oremosu AA, Akanmu AS. Combination antiretroviral therapy (cART)-induced hippocampal disorders: Highlights on therapeutic potential of Naringenin and Quercetin. IBRO Rep 2019; 6:137-146. [PMID: 31061913 PMCID: PMC6488719 DOI: 10.1016/j.ibror.2019.04.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 04/22/2019] [Indexed: 12/19/2022] Open
Abstract
Naringenin and Quercetin decrease ROS and potentiate enzymatic antioxidant production in the hippocampus. cART induced marked cytoplasmic shrinkage and several pyknotic nuclei in the dentate gyrus and cornus ammonis region. Naringenin and Quercetin attenuates cART-induced upregulation of monoamine oxidase-B expression in neurons. Naringenin and Quercetin also ameliorates cART-induced spatial memory impairments. Naringenin and Quercetin acted as effective antioxidants in vivo against cART-induced neurotoxicity.
Introduction In spite of the multiple benefits of combination antiretroviral therapy (cART) on HIV positive patients, prolonged usage has been reported to exacerbate oxidative stress, and induce neurological and cognitive dysfunction, thus, the need to search for an adjuvant therapy to ameliorate the oxidative and improve treatment adherence with better virological outcome. This study aimed at determining the potential therapeutic effects of Quercetin and Naringenin on cART-induced cyto-architectural, neuro-behavioral and immunohistochemical changes in the hippocampus of the adult Wister rats. Materials and Methods The animals were grouped as follows: Control, DMSO, 24 mg/kg cART (Tenovovir 300 mg, Lamivudine 300 mg and Efavirenz 600 mg), 50 mg/kg Naringenin, 50 mg/kg Quercetin, cART + Naringenin, cART + Quercetin were administered orally for 8 weeks. At the end of administration, neurobehavioural test was conducted, animals were euthanized and hippocampus was processed for oxidative stress markers, histology, TNF-α, and Monoamine oxidase-B expression. Results At the end of 8 weeks of administration, 24 mg/kg cART decreased superoxide dismutase (SOD), catalase (CAT), reduced glutathione (GSH) and increased Malondialdehyde (MDA). Whereas, 50 mg/kg quercetin, and 50 mg/kg Naringenin decreased the oxidative stress (increased SOD, CAT, GSH, and reduced MDA) induced by cART (reduced SOD, CAT, GSH, and increased MDA). In addition, hematoxylin and eosin stained hippocampus showed that quercetin and naringenin prevented neurodegenerative changes (marked cytoplasmic shrinkage and several pyknotic nuclei in the dentate gyrus and cornus ammonis regions) in cART-treated rats. Furthermore, immunohistochemical studies revealed that quercetin and naringenin attenuates cART-induced upregulation of monoamine oxidase-B (MAO-B) expression. Likewise, from the Morris water maze neurobehavioral studies, naringenin and quercetin also ameliorated cART-induced memory impairments (initial spatial memory, reversal spatial memory and probe tests). Conclusion This study shows that Naringenin and Quercetin have a good potential in reversing cART-induced hippocampal disorders in Wistar rats.
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Key Words
- CA/Q, 24 mg/kg combination antiretroviral therapy + 50 mg Quercetin
- CAT, catalase
- DMSO, dimethyl sulfoxide
- DTA, ethylenediaminetetraacetic acid
- ELISA, enzyme-linked immunosorbent assay
- GSH, reduced glutathione
- HCL, hydrochloric acidE
- Hippocampus
- MAO-B, monoamine oxidase B
- MDA, malondialdehyde
- Nar, naringenin
- Naringenin
- Neurodegeneration
- Oxidative stress
- Quer, quercetin
- Quercetin
- ROS, reactive oxygen species
- SOD, superoxide dismutase
- TBA, thiobarbituric acid
- TNFα, tumor necrosis factor alpha
- cA/N, 24 mg/kg combination antiretroviral therapy + 50 mg Naringenin
- cART
- cART, combination antiretroviral therapy
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Affiliation(s)
- Edidiong N. Akang
- Department of Anatomy, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
- Corresponding author.
| | - Olufunke O. Dosumu
- Department of Anatomy, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
| | - Olasunmbo O. Afolayan
- Department of Anatomy, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
| | - Adeola M. Fagoroye
- Department of Anatomy, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
| | - Daniel D. Osiagwu
- Department of Anatomic and Molecular Pathology, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
| | - Isilamiyat T. Usman
- Department of Anatomy, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
| | - Ademola A. Oremosu
- Department of Anatomy, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
| | - Alani S. Akanmu
- Department of Haematology and Blood Transfusion, College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
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Dharmaraj T, Guan Y, Liu J, Badens C, Gaborit B, Wilson KL. Rare BANF1 Alleles and Relatively Frequent EMD Alleles Including 'Healthy Lipid' Emerin p.D149H in the ExAC Cohort. Front Cell Dev Biol 2019; 7:48. [PMID: 31024910 PMCID: PMC6459885 DOI: 10.3389/fcell.2019.00048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 03/19/2019] [Indexed: 01/05/2023] Open
Abstract
Emerin (EMD) and barrier to autointegration factor 1 (BANF1) each bind A-type lamins (LMNA) as fundamental components of nuclear lamina structure. Mutations in LMNA, EMD and BANF1 are genetically linked to many tissue-specific disorders including Emery-Dreifuss muscular dystrophy and cardiomyopathy (LMNA, EMD), lipodystrophy, insulin resistance and type 2 diabetes (LMNA) and progeria (LMNA, BANF1). To explore human genetic variation in these genes, we analyzed EMD and BANF1 alleles in the Exome Aggregation Consortium (ExAC) cohort of 60,706 unrelated individuals. We identified 13 rare heterozygous BANF1 missense variants (p.T2S, p.H7Y, p.D9N, p.S22R, p.G25E, p.D55N, p.D57Y, p.L63P, p.N70T, p.K72R, p.R75W, p.R75Q, p.G79R), and one homozygous variant (p.D9H). Several variants are known (p.G25E) or predicted (e.g., p.D9H, p.D9N, p.L63P) to perturb BANF1 and warrant further study. Analysis of EMD revealed two previously identified variants associated with adult-onset cardiomyopathy (p.K37del, p.E35K) and one deemed 'benign' in an Emery-Dreifuss patient (p.D149H). Interestingly p.D149H was the most frequent emerin variant in ExAC, identified in 58 individuals (overall allele frequency 0.06645%), of whom 55 were East Asian (allele frequency 0.8297%). Furthermore, p.D149H associated with four 'healthy' traits: reduced triglycerides (-0.336; p = 0.0368), reduced waist circumference (-0.321; p = 0.0486), reduced cholesterol (-0.572; p = 0.000346) and reduced LDL cholesterol (-0.599; p = 0.000272). These traits are distinct from LMNA-associated metabolic disorders and provide the first insight that emerin influences metabolism. We also identified one novel in-frame deletion (p.F39del) and 62 novel emerin missense variants, many of which were relatively frequent and potentially disruptive including p.N91S and p.S143F (∼0.041% and ∼0.034% of non-Finnish Europeans, respectively), p.G156S (∼0.39% of Africans), p.R204G (∼0.18% of Latinx), p.R207P (∼0.08% of South Asians) and p.R221L (∼0.15% of Latinx). Many novel BANF1 variants are predicted to disrupt dimerization or binding to DNA, histones, emerin or A-type lamins. Many novel emerin variants are predicted to disrupt emerin filament dynamics or binding to BANF1, HDAC3, A-type lamins or other partners. These new human variants provide a foundational resource for future studies to test the molecular mechanisms of BANF1 and emerin function, and to understand the link between emerin variant p.D149H and a 'healthy' lipid profile.
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Affiliation(s)
- Tejas Dharmaraj
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Youchen Guan
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Julie Liu
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | | | | | - Katherine L Wilson
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
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Morales-Ovalles Y, Miranda-Contreras L, Peña-Contreras Z, Dávila-Vera D, Balza-Quintero A, Sánchez-Gil B, Mendoza-Briceño RV. Developmental exposure to mancozeb induced neurochemical and morphological alterations in adult male mouse hypothalamus. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 64:139-146. [PMID: 30391875 DOI: 10.1016/j.etap.2018.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 10/11/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
Mancozeb, a dithiocarbamate widely used in agriculture, is considered a developmental hazard in humans; however, more evidences are still needed concerning the consequences of chronic exposure to this pesticide. Mancozeb neurotoxicity in developing mouse hypothalamus was evaluated by subchronic exposure of male Mus musculus mice to low and high doses of mancozeb (30 and 90 mg/kg body weight, respectively) from late neonatal until adolescence. Variations in hypothalamic amino acid neurotransmitter levels and changes in histological as well as cytological characteristics were analyzed in young adult experimental mice and compared with control. A dose-dependent increase in excitation/ inhibition ratio was observed in mancozeb-exposed hypothalamus, indicating an overall state of excitoxicity. Histopathological and ultrastructural studies showed increased apoptosis, neuroinflammation and demyelination, demonstrating mancozeb-induced cytotoxicity in hypothalamic neurosecretory cells. In summary, both neurochemical and morphological data revealed mancozeb-induced alterations during development of hypothalamic circuitry that are critical for maturation of the neuroendocrine system.
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Affiliation(s)
- Yasmin Morales-Ovalles
- Electron Microscopy Center "Dr. Ernesto Palacios Prü", University of Los Andes, Mérida, Venezuela
| | | | - Zulma Peña-Contreras
- Electron Microscopy Center "Dr. Ernesto Palacios Prü", University of Los Andes, Mérida, Venezuela
| | - Delsy Dávila-Vera
- Electron Microscopy Center "Dr. Ernesto Palacios Prü", University of Los Andes, Mérida, Venezuela
| | - Alirio Balza-Quintero
- Electron Microscopy Center "Dr. Ernesto Palacios Prü", University of Los Andes, Mérida, Venezuela
| | - Beluardi Sánchez-Gil
- Electron Microscopy Center "Dr. Ernesto Palacios Prü", University of Los Andes, Mérida, Venezuela
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Selmanoğlu G, Mülayimçelik Özgün G, Karacaoğlu E. Acrolein-mediated neurotoxicity in growing Wistar male rats. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 149:37-43. [PMID: 30033014 DOI: 10.1016/j.pestbp.2018.05.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/03/2018] [Accepted: 05/14/2018] [Indexed: 06/08/2023]
Affiliation(s)
- Güldeniz Selmanoğlu
- Hacettepe University, Faculty of Science, Department of Biology, Beytepe, Ankara 06800, Turkey
| | | | - Elif Karacaoğlu
- Hacettepe University, Faculty of Science, Department of Biology, Beytepe, Ankara 06800, Turkey.
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da Silva AMB, Silva-Gonçalves LC, Oliveira FA, Arcisio-Miranda M. Pro-necrotic Activity of Cationic Mastoparan Peptides in Human Glioblastoma Multiforme Cells Via Membranolytic Action. Mol Neurobiol 2017; 55:5490-5504. [DOI: 10.1007/s12035-017-0782-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 09/20/2017] [Indexed: 01/10/2023]
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