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Di Bari M, Tombolillo V, Alessandrini F, Guerriero C, Fiore M, Asteriti IA, Castigli E, Sciaccaluga M, Guarguaglini G, Degrassi F, Tata AM. M2 Muscarinic Receptor Activation Impairs Mitotic Progression and Bipolar Mitotic Spindle Formation in Human Glioblastoma Cell Lines. Cells 2021; 10:cells10071727. [PMID: 34359896 PMCID: PMC8306299 DOI: 10.3390/cells10071727] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/24/2021] [Accepted: 07/06/2021] [Indexed: 12/30/2022] Open
Abstract
Background: Glioblastoma multiforme (GBM) is characterized by several genetic abnormalities, leading to cell cycle deregulation and abnormal mitosis caused by a defective checkpoint. We previously demonstrated that arecaidine propargyl ester (APE), an orthosteric agonist of M2 muscarinic acetylcholine receptors (mAChRs), arrests the cell cycle of glioblastoma (GB) cells, reducing their survival. The aim of this work was to better characterize the molecular mechanisms responsible for this cell cycle arrest. Methods: The arrest of cell proliferation was evaluated by flow cytometry analysis. Using immunocytochemistry and time-lapse analysis, the percentage of abnormal mitosis and aberrant mitotic spindles were assessed in both cell lines. Western blot analysis was used to evaluate the modulation of Sirtuin2 and acetylated tubulin—factors involved in the control of cell cycle progression. Results: APE treatment caused arrest in the M phase, as indicated by the increase in p-HH3 (ser10)-positive cells. By immunocytochemistry, we found a significant increase in abnormal mitoses and multipolar mitotic spindle formation after APE treatment. Time-lapse analysis confirmed that the APE-treated GB cells were unable to correctly complete the mitosis. The modulated expression of SIRT2 and acetylated tubulin in APE-treated cells provides new insights into the mechanisms of altered mitotic progression in both GB cell lines. Conclusions: Our data show that the M2 agonist increases aberrant mitosis in GB cell lines. These results strengthen the idea of considering M2 acetylcholine receptors a novel promising therapeutic target for the glioblastoma treatment.
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Affiliation(s)
- Maria Di Bari
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (M.D.B.); (V.T.); (F.A.); (C.G.)
| | - Vanessa Tombolillo
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (M.D.B.); (V.T.); (F.A.); (C.G.)
| | - Francesco Alessandrini
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (M.D.B.); (V.T.); (F.A.); (C.G.)
| | - Claudia Guerriero
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (M.D.B.); (V.T.); (F.A.); (C.G.)
| | - Mario Fiore
- Institute of Molecular Biology and Pathology, CNR, 00185 Rome, Italy; (M.F.); (I.A.A.); (G.G.); (F.D.)
| | - Italia Anna Asteriti
- Institute of Molecular Biology and Pathology, CNR, 00185 Rome, Italy; (M.F.); (I.A.A.); (G.G.); (F.D.)
| | - Emilia Castigli
- Department of Experimental Medicine, Section of Physiology and Biochemistry, University of Perugia, 06100 Perugia, Italy;
| | - Miriam Sciaccaluga
- Department of Medicine and Surgery, University of Perugia, 06100 Perugia, Italy;
| | - Giulia Guarguaglini
- Institute of Molecular Biology and Pathology, CNR, 00185 Rome, Italy; (M.F.); (I.A.A.); (G.G.); (F.D.)
| | - Francesca Degrassi
- Institute of Molecular Biology and Pathology, CNR, 00185 Rome, Italy; (M.F.); (I.A.A.); (G.G.); (F.D.)
| | - Ada Maria Tata
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (M.D.B.); (V.T.); (F.A.); (C.G.)
- Research Centre of Neurobiology Daniel Bovet, 00185 Rome, Italy
- Correspondence:
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Maged AM, Nabil H, Dieb AS, Essam A, Ibrahim S, Deeb W, Fahmy RM. Prediction of metaphase II oocytes according to different levels of serum AMH in poor responders using the antagonist protocol during ICSI: a cohort study. Gynecol Endocrinol 2020; 36:728-733. [PMID: 31870186 DOI: 10.1080/09513590.2019.1706081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The aim of our study was to assess the value of serum AMH in prediction of metaphase II oocytes in poor responders. We performed a prospective cohort study included 206 poor responders candidate for ICSI using antagonist protocol. They were classified into 3 groups. Group I included 50 women with AMH < 0.3 ng/ml, group II included 85 women with AMH 0.3-0.7 ng/ml and group III included 71 women with AMH > 0.7-1.0 ng/ml. The primary outcome parameter was the number of MII oocytes. There was a highly significant difference between the study groups regarding E2 at triggering (481.41 ± 222.653, 648.17 ± 264.353 and 728.74 ± 305.412 respectively, number of oocyte retrieved (2.37 ± 1.178, 3.38 ± 1.622 and 3.80 ± 1.427 respectively), number of MII oocytes (1.66 ± 1.039, 2.35 ± 1.171 and 2.61 ± 1.080 respectively), number of fertilized oocytes (1.39 ± 0.919, 1.91 ± 0.983 and 2.21 ± 0.937 respectively), , total number of embryos (1.34 ± 0.938, 1.76 ± 0.956 and 2.09 ± 0.907 respectively), clinical pregnancy rates (4.9 vs. 7.7 and 19.7% respectively). We concluded that AMH is a good predictor for number of MII oocytes in poor responders undergoing ICSI.
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Affiliation(s)
- Ahmed M Maged
- Obstetrics and Gynecology Department, Kasr Al-Ainy Hospital, Cairo University, Cairo, Egypt
| | - Hala Nabil
- Obstetrics and Gynecology Department, Kasr Al-Ainy Hospital, Cairo University, Cairo, Egypt
| | - Amira S Dieb
- Obstetrics and Gynecology Department, Kasr Al-Ainy Hospital, Cairo University, Cairo, Egypt
| | - Aimy Essam
- Obstetrics and Gynecology Department, Kasr Al-Ainy Hospital, Cairo University, Cairo, Egypt
| | - Safaa Ibrahim
- Obstetrics and Gynecology Department, Kasr Al-Ainy Hospital, Cairo University, Cairo, Egypt
| | - Wesam Deeb
- Obstetrics and Gynecology Department, Fayoum University, Faiyum, Egypt
| | - Radwa M Fahmy
- Obstetrics and Gynecology Department, Kasr Al-Ainy Hospital, Cairo University, Cairo, Egypt
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3
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Abstract
Glyphosate, formulated as glyphosate-based herbicides (GBHs) including the best-known formulation Roundup, is the world's most widely used herbicide. During the last years, the growing and widespread use of GBHs has raised a great concern about the impact of environmental contamination on animal and human health including potential effect on reproductive systems. Using an in vitro model of pig oocyte maturation, we examined the biological impact of both glyphosate and Roundup on female gamete evaluating nuclear maturation, cytoplasmic maturation and developmental competence of oocytes, steroidogenic activity of cumulus cells as well as intracellular levels of glutathione (GSH) and ROS of oocytes. Our results indicate that although exposure to glyphosate and Roundup during in vitro maturation does not affect nuclear maturation and embryo cleavage, it does impair oocyte developmental competence in terms of blastocyst rate and cellularity. Moreover, Roundup at the same glyphosate-equivalent concentrations was shown to be more toxic than pure glyphosate, altering steroidogenesis and increasing oocyte ROS levels, thus confirming that Roundup adjuvants enhance glyphosate toxic effects and/or are biologically active in their side-effect and therefore should be considered and tested as active ingredients.
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Affiliation(s)
- Marcella Spinaci
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano dell'Emilia, Bologna, Italy.
| | - Chiara Nerozzi
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano dell'Emilia, Bologna, Italy
| | - Car Lo Tamanini
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano dell'Emilia, Bologna, Italy
| | - Diego Bucci
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano dell'Emilia, Bologna, Italy
| | - Giovanna Galeati
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano dell'Emilia, Bologna, Italy
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4
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Yahfoufi ZA, Bai D, Khan SN, Chatzicharalampous C, Kohan-Ghadr HR, Morris RT, Abu-Soud HM. Glyphosate Induces Metaphase II Oocyte Deterioration and Embryo Damage by Zinc Depletion and Overproduction of Reactive Oxygen Species. Toxicology 2020; 439:152466. [PMID: 32315717 DOI: 10.1016/j.tox.2020.152466] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 12/18/2022]
Abstract
Glyphosate is the most popular herbicide used in modern agriculture, and its use has been increasing substantially since its introduction. Accordingly, glyphosate exposure from food and water, the environment, and accidental and occupational venues has also increased. Recent studies have demonstrated a relationship between glyphosate exposure and a number of disorders such as cancer, immune and metabolic disorders, endocrine disruption, imbalance of intestinal flora, cardiovascular disease, and infertility; these results have given glyphosate a considerable amount of media and scientific attention. Notably, glyphosate is a powerful metal chelator, which could help explain some of its effects. Recently, our findings on 2,3-dimercapto-1-propanesulfonic acid, another metal chelator, showed deterioration of oocyte quality. Here, to generalize, we investigated the effects of glyphosate (0 - 300 μM) on metaphase II mouse oocyte quality and embryo damage to obtain insight on its mechanisms of cellular action and the tolerance of oocytes and embryos towards this chemical. Our work shows for the first time that glyphosate exposure impairs metaphase II mouse oocyte quality via two mechanisms: 1) disruption of the microtubule organizing center and chromosomes such as anomalous pericentrin formation, spindle fiber destruction and disappearance, and defective chromosomal alignment and 2) substantial depletion of intracellular zinc bioavailability and enhancement of reactive oxygen species accumulation. Similar effects were found in embryos. These results may help clarify the effects of glyphosate exposure on female fertility and provide counseling and preventative steps for excessive glyphosate intake and resulting oxidative stress and reduced zinc bioavailability.
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Affiliation(s)
- Zeina A Yahfoufi
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan 48201, United States; Department of Physiology, Wayne State University School of Medicine, Detroit, MI,48201, United States
| | - David Bai
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan 48201, United States
| | - Sana N Khan
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan 48201, United States
| | - Charalampos Chatzicharalampous
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan 48201, United States
| | - Hamid-Reza Kohan-Ghadr
- Michigan State University, Department of Obstetrics, Gynecology and Reproductive Biology, College of Human Medicine, Grand Rapids, Michigan 45903, United States
| | - Robert T Morris
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan 48201, United States; Karmaros Cancer Institute, Detroit, MI, 48201, United States
| | - Husam M Abu-Soud
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, Michigan 48201, United States; Department of Physiology, Wayne State University School of Medicine, Detroit, MI,48201, United States; Department of Microbiology, Immunology and Biochemistry, Wayne State University School of Medicine, Detroit, MI, 48201, United States.
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Turkez H, Cacciatore I, Arslan ME, Fornasari E, Marinelli L, Di Stefano A, Mardinoglu A. Histidyl-Proline Diketopiperazine Isomers as Multipotent Anti-Alzheimer Drug Candidates. Biomolecules 2020; 10:biom10050737. [PMID: 32397415 PMCID: PMC7277666 DOI: 10.3390/biom10050737] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 04/26/2020] [Accepted: 04/29/2020] [Indexed: 12/13/2022] Open
Abstract
Cyclic dipeptides administered by both parenteral and oral routes are suggested as promising candidates for the treatment of neurodegeneration-related pathologies. In this study, we tested Cyclo (His-Pro) isomers (cHP1-4) for their anti-Alzheimer potential using a differentiated human neuroblastoma cell line (SH-SY5Y) as an Alzheimer’s disease (AD) experimental model. The SH-SY5Y cell line was differentiated by the application of all-trans retinoic acid (RA) to obtain mature neuron-like cells. Amyloid-beta 1-42 (Aβ1-42) peptides, the main effector in AD, were administered to the differentiated cell cultures to constitute the in vitro disease model. Next, we performed cell viability analyses 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) release assays) to investigate the neuroprotective concentrations of cyclodipeptides using the in vitro AD model. We evaluated acetylcholinesterase (AChE), α- and β-secretase activities (TACE and BACE1), antioxidant potency, and apoptotic/necrotic properties and performed global gene expression analysis to understand the main mechanism behind the neuroprotective features of cHP1-4. Moreover, we conducted sister chromatid exchange (SCE), micronucleus (MN), and 8-hydroxy-2′-deoxyguanosine (8-OHdG) analyses to evaluate the genotoxic damage potential after applications with cHP1-4 on cultured human lymphocytes. Our results revealed that cHP1-4 isomers provide a different degree of neuroprotection against Aβ1-42-induced cell death on the in vitro AD model. The applications with cHP1-4 isomers altered the activity of AChE but not the activity of TACE and BACE1. Our analysis indicated that the cHP1-4 increased the total antioxidant capacity without altering total oxidative status levels in the cellular AD model and that cHP1-4 modulated the alterations of gene expressions by Aβ1-42 exposure. We also observed that cHP1-4 exhibited noncytotoxic and non-genotoxic features in cultured human whole blood cells. In conclusion, cHP1-4 isomers, especially cHP4, have been explored as novel promising therapeutics against AD.
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Affiliation(s)
- Hasan Turkez
- Department of Medical Biology, Faculty of Medicine, Atatürk University, 25240 Erzurum, Turkey
- Correspondence: (H.T.); (A.M.)
| | - Ivana Cacciatore
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, via dei Vestini 31, 66100 Chieti Scalo (CH), Italy; (I.C.); (E.F.); (L.M.); (A.D.S.)
| | - Mehmet Enes Arslan
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, 25050 Erzurum, Turkey;
| | - Erika Fornasari
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, via dei Vestini 31, 66100 Chieti Scalo (CH), Italy; (I.C.); (E.F.); (L.M.); (A.D.S.)
| | - Lisa Marinelli
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, via dei Vestini 31, 66100 Chieti Scalo (CH), Italy; (I.C.); (E.F.); (L.M.); (A.D.S.)
| | - Antonio Di Stefano
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, via dei Vestini 31, 66100 Chieti Scalo (CH), Italy; (I.C.); (E.F.); (L.M.); (A.D.S.)
| | - Adil Mardinoglu
- Science for Life Laboratory, KTH-Royal Institute of Technology, SE-17121 Stockholm, Sweden
- Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College London, London SE1 9RT, UK
- Correspondence: (H.T.); (A.M.)
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Simerly C, Manil-Ségalen M, Castro C, Hartnett C, Kong D, Verlhac MH, Loncarek J, Schatten G. Separation and Loss of Centrioles From Primordidal Germ Cells To Mature Oocytes In The Mouse. Sci Rep 2018; 8:12791. [PMID: 30143724 PMCID: PMC6109097 DOI: 10.1038/s41598-018-31222-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 08/09/2018] [Indexed: 12/15/2022] Open
Abstract
Oocytes, including from mammals, lack centrioles, but neither the mechanism by which mature eggs lose their centrioles nor the exact stage at which centrioles are destroyed during oogenesis is known. To answer questions raised by centriole disappearance during oogenesis, using a transgenic mouse expressing GFP-centrin-2 (GFP CETN2), we traced their presence from e11.5 primordial germ cells (PGCs) through oogenesis and their ultimate dissolution in mature oocytes. We show tightly coupled CETN2 doublets in PGCs, oogonia, and pre-pubertal oocytes. Beginning with follicular recruitment of incompetent germinal vesicle (GV) oocytes, through full oocyte maturation, the CETN2 doublets separate within the pericentriolar material (PCM) and a rise in single CETN2 pairs is identified, mostly at meiotic metaphase-I and -II spindle poles. Partial CETN2 foci dissolution occurs even as other centriole markers, like Cep135, a protein necessary for centriole duplication, are maintained at the PCM. Furthermore, live imaging demonstrates that the link between the two centrioles breaks as meiosis resumes and that centriole association with the PCM is progressively lost. Microtubule inhibition shows that centriole dissolution is uncoupled from microtubule dynamics. Thus, centriole doublets, present in early G2-arrested meiotic prophase oocytes, begin partial reduction during follicular recruitment and meiotic resumption, later than previously thought.
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Affiliation(s)
- Calvin Simerly
- Departments of Cell Biology; Obstetrics, Gynecology and Reproductive Sciences; and Bioengineering, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA
| | - Marion Manil-Ségalen
- Center for Interdisciplinary Research in Biology (CIRB) Collège de France, CNRS, INSERM, PSL Research University, Equipe labellisée FRM, Paris, France
| | - Carlos Castro
- Departments of Cell Biology; Obstetrics, Gynecology and Reproductive Sciences; and Bioengineering, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA
| | - Carrie Hartnett
- Departments of Cell Biology; Obstetrics, Gynecology and Reproductive Sciences; and Bioengineering, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA
| | - Dong Kong
- Laboratory of Protein Dynamics and Signaling, National Institutes of Health/Center for Cancer Research/National Cancer Institute-Frederick, Frederick, MD, 21702, USA
| | - Marie-Hélène Verlhac
- Center for Interdisciplinary Research in Biology (CIRB) Collège de France, CNRS, INSERM, PSL Research University, Equipe labellisée FRM, Paris, France
| | - Jadranka Loncarek
- Laboratory of Protein Dynamics and Signaling, National Institutes of Health/Center for Cancer Research/National Cancer Institute-Frederick, Frederick, MD, 21702, USA
| | - Gerald Schatten
- Departments of Cell Biology; Obstetrics, Gynecology and Reproductive Sciences; and Bioengineering, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA.
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Su KC, Barry Z, Schweizer N, Maiato H, Bathe M, Cheeseman IM. A Regulatory Switch Alters Chromosome Motions at the Metaphase-to-Anaphase Transition. Cell Rep 2017; 17:1728-1738. [PMID: 27829144 PMCID: PMC5130098 DOI: 10.1016/j.celrep.2016.10.046] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 09/09/2016] [Accepted: 10/13/2016] [Indexed: 12/19/2022] Open
Abstract
To achieve chromosome segregation during mitosis, sister chromatids must undergo a dramatic change in their behavior to switch from balanced oscillations at the metaphase plate to directed poleward motion during anaphase. However, the factors that alter chromosome behavior at the metaphase-to-anaphase transition remain incompletely understood. Here, we perform time-lapse imaging to analyze anaphase chromosome dynamics in human cells. Using multiple directed biochemical, genetic, and physical perturbations, our results demonstrate that differences in the global phosphorylation states between metaphase and anaphase are the major determinant of chromosome motion dynamics. Indeed, causing a mitotic phosphorylation state to persist into anaphase produces dramatic metaphase-like oscillations. These induced oscillations depend on both kinetochore-derived and polar ejection forces that oppose poleward motion. Thus, our analysis of anaphase chromosome motion reveals that dephosphorylation of multiple mitotic substrates is required to suppress metaphase chromosome oscillatory motions and achieve directed poleward motion for successful chromosome segregation.
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Affiliation(s)
- Kuan-Chung Su
- Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA
| | - Zachary Barry
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Nina Schweizer
- Chromosome Instability and Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal; i3S - Instituto de Investigação e Inovação em Saúdem, Universidade do Porto, 4200-135 Porto, Portugal
| | - Helder Maiato
- Chromosome Instability and Dynamics Laboratory, Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal; i3S - Instituto de Investigação e Inovação em Saúdem, Universidade do Porto, 4200-135 Porto, Portugal; Cell Division Unit, Department of Experimental Biology, Faculdade de Medicina, Universidade do Porto, 4200-135 Porto, Portugal
| | - Mark Bathe
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Iain McPherson Cheeseman
- Whitehead Institute for Biomedical Research, Nine Cambridge Center, Cambridge, MA 02142, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
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Aldhaheri SR, Jeelani R, Kohan-Ghadr HR, Khan SN, Mikhael S, Washington C, Morris RT, Abu-Soud HM. Dimercapto-1-propanesulfonic acid (DMPS) induces metaphase II mouse oocyte deterioration. Free Radic Biol Med 2017; 112:445-451. [PMID: 28844937 DOI: 10.1016/j.freeradbiomed.2017.08.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 12/21/2022]
Abstract
In light of the recent lead contamination of the water in Flint, Michigan and its potential adverse outcomes, much research and media attention has turned towards the safety profile of commonly used chelators. Dimercapto-1-propanesulfonic acid (DMPS) typically used in the treatment of lead, mercury and arsenic poisoning also displays a high affinity towards transition metals such as zinc and copper, essential for biological functioning. It is given in series of dosages (0.2-0.4g/day) over a long period, and has the ability to enter cells. In this work, we investigated the mechanism through which increasing concentrations of DMPS alter oocyte quality as judged by changes in microtubule morphology (MT) and chromosomal alignment (CH) of metaphase II mice oocyte. The oocytes were directly exposed to increasing concentration of DMPS (10, 25, 50, 100 and 300μM) for four hours (time of peak plasma concentration after administration) and reactive oxygen species (mainly hydroxyl radical and superoxide) and zinc content were measured. This data showed DMPS plays an important role in deterioration of oocyte quality through a mechanism involving zinc deficiency and enhancement of reactive oxygen species a major contributor to oocyte damage. Our current work, for the first time, demonstrates the possibility of DMPS to negatively impact fertility. This finding can not only help in counseling reproductive age patients undergoing such treatment but also in the development of potential therapies to alleviate oxidative damage and preserve fertility in people receiving heavy metal chelators.
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Affiliation(s)
- Sarah R Aldhaheri
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Roohi Jeelani
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Hamid-Reza Kohan-Ghadr
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Sana N Khan
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Sasha Mikhael
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Christina Washington
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Robert T Morris
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA; Karmanos Cancer Institute, Detroit, MI 48201, USA
| | - Husam M Abu-Soud
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine, Detroit, MI 48201, USA; Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI 48201, USA.
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9
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Valgôde FGS, da Silva MA, Vieira DP, Ribela MTCP, Bartolini P, Okazaki K. Cytotoxic and genotoxic effects of 131 I and 60 Co in follicular thyroid cancer cell (WRO) with and without recombinant human thyroid-stimulating hormone treatment. Environ Mol Mutagen 2017; 58:451-461. [PMID: 28561379 DOI: 10.1002/em.22099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 02/22/2017] [Accepted: 04/24/2017] [Indexed: 06/07/2023]
Abstract
Normally, differentiated thyroid cancer (DTC) tends to be biologically indolent, highly curable and has an excellent prognosis. However, the treatment may fail when the cancer has lost radioiodine avidity. The present study was carried out in order to evaluate the cytotoxic and genotoxic effects of 131 I and 60 Co and radioiodine uptake in WRO cells, derived from DTC, harboring the BRAFV600E mutation. WRO cells showed a relatively slow cell cycle of 96.3 h with an unstable karyotype containing various double minutes. The genotoxicity assay (micronucleus test) showed a relative high radioresistance to 131 I (0.07-3.70 MBq/mL), independent of treatment with recombinant human thyroid-stimulating hormone (rhTSH). For the cytotoxicity assay, WRO cells were also relatively resistant to 60 Co (range: 0.2-8.3 Gy), but with a gradual decrease of viability as a function of time for higher doses (20 and 40 Gy, starting from the fifth to sixth day). For internal irradiation with 131 I, WRO cells showed a decline in viability at radioactive concentration higher than 1.85 MBq/mL; this was even more effective at 3.70 MBq/mL, but only when preceded by rhTSH, in coincidence with the highest level of 131 I uptake. These data show promising results, since the loss of the ability of thyroid cells to concentrate radioiodine is considered to be one of the main factors responsible for the failure of 131 I therapy in patients with DTC. The use of tumor-derived cell lines as a model for in vivo tumor requires, however, further investigations and deep evaluation of the corresponding in vivo effects. Environ. Mol. Mutagen. 58:451-461, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Flávia Gomes Silva Valgôde
- Centro de Biotecnologia, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes, 2242, CEP 05508-900, Caixa Postal 11049, Cidade Universitária, São Paulo, Brazil
| | - Márcia Augusta da Silva
- Centro de Biotecnologia, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes, 2242, CEP 05508-900, Caixa Postal 11049, Cidade Universitária, São Paulo, Brazil
| | - Daniel Perez Vieira
- Centro de Biotecnologia, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes, 2242, CEP 05508-900, Caixa Postal 11049, Cidade Universitária, São Paulo, Brazil
| | - Maria Teresa Carvalho Pinto Ribela
- Centro de Biotecnologia, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes, 2242, CEP 05508-900, Caixa Postal 11049, Cidade Universitária, São Paulo, Brazil
| | - Paolo Bartolini
- Centro de Biotecnologia, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes, 2242, CEP 05508-900, Caixa Postal 11049, Cidade Universitária, São Paulo, Brazil
| | - Kayo Okazaki
- Centro de Biotecnologia, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes, 2242, CEP 05508-900, Caixa Postal 11049, Cidade Universitária, São Paulo, Brazil
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10
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Yamada K, Nagasato C, Motomura T, Ichinomiya M, Kuwata A, Kamiya M, Ohki K, Yoshikawa S. Mitotic spindle formation in Triparma laevis NIES-2565(Parmales, Heterokontophyta). Protoplasma 2017; 254:461-471. [PMID: 27048177 DOI: 10.1007/s00709-016-0967-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 03/23/2016] [Indexed: 06/05/2023]
Abstract
The parmalean algae possess a siliceous wall and represent the sister lineage of diatoms; they are thought to be a key group for understanding the evolution of diatoms. Diatoms possess well-characterized and unique mitotic structures, but the mitotic apparatus of Parmales is still unknown. We observed the microtubule (MT) array during interphase and mitosis in Triparma laevis using TEM. The interphase cells had four or five centrioles (∼80 nm in length), from which MTs emanated toward the cytoplasm. In prophase, the bundle of MTs arose at an extranuclear site. The position of centrioles with respect to an MT bundle changed during its elongation. Centrioles were observed on the lateral side of a shorter MT bundle (∼590 nm) and on either side of an extended MT bundle (∼700 nm). In metaphase, the spindle consisted of two types of MTs-MT bundle that passed through a cytoplasmic tunnel in the center of the nucleus and single MTs (possibly kinetochore MTs) that extended from the poles into the nucleus. The nuclear envelope disappeared only at the regions where the kinetochore MTs penetrated. In telophase, daughter chromosomes migrated toward opposite poles, and the MT bundle was observed between segregating chromosomes. These observations showed that MT nucleation does not always occur at the periphery of centrioles through cell cycle and that the spindle of T. laevis has a similar configuration to that of diatoms.
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Affiliation(s)
- Kazumasa Yamada
- Muroran Marine Station, Field Science Center for Northern Biosphere, Hokkaido University, Muroran, 051-0003, Japan
| | - Chikako Nagasato
- Muroran Marine Station, Field Science Center for Northern Biosphere, Hokkaido University, Muroran, 051-0003, Japan
| | - Taizo Motomura
- Muroran Marine Station, Field Science Center for Northern Biosphere, Hokkaido University, Muroran, 051-0003, Japan
| | - Mutsuo Ichinomiya
- Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Higashi, 862-8502, Japan
| | - Akira Kuwata
- Tohoku National Fisheries Research Institute, Shiogama, 985-0001, Japan
| | - Mitsunobu Kamiya
- Faculty of Marine Bioscience, Fukui Prefectural University, Obama, 917-0003, Japan
| | - Kaori Ohki
- Faculty of Marine Bioscience, Fukui Prefectural University, Obama, 917-0003, Japan
| | - Shinya Yoshikawa
- Faculty of Marine Bioscience, Fukui Prefectural University, Obama, 917-0003, Japan.
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11
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Phengchat R, Takata H, Morii K, Inada N, Murakoshi H, Uchiyama S, Fukui K. Calcium ions function as a booster of chromosome condensation. Sci Rep 2016; 6:38281. [PMID: 27910894 PMCID: PMC5133622 DOI: 10.1038/srep38281] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 11/07/2016] [Indexed: 12/14/2022] Open
Abstract
Chromosome condensation is essential for the faithful transmission of genetic information to daughter cells during cell division. The depletion of chromosome scaffold proteins does not prevent chromosome condensation despite structural defects. This suggests that other factors contribute to condensation. Here we investigated the contribution of divalent cations, particularly Ca2+, to chromosome condensation in vitro and in vivo. Ca2+ depletion caused defects in proper mitotic progression, particularly in chromosome condensation after the breakdown of the nuclear envelope. Fluorescence lifetime imaging microscopy-Förster resonance energy transfer and electron microscopy demonstrated that chromosome condensation is influenced by Ca2+. Chromosomes had compact globular structures when exposed to Ca2+ and expanded fibrous structures without Ca2+. Therefore, we have clearly demonstrated a role for Ca2+ in the compaction of chromatin fibres.
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Affiliation(s)
- Rinyaporn Phengchat
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan
| | - Hideaki Takata
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan
| | - Kenichi Morii
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan
| | - Noriko Inada
- The Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama-Cho Ikoma-shi, Nara 630-0192, Japan
| | - Hideji Murakoshi
- Supportive Center for Brain Research, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan
| | - Susumu Uchiyama
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan
| | - Kiichi Fukui
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan
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Abstract
Analysis and sorting of plant chromosomes (plant flow cytogenetics) is a special application of flow cytometry in plant genomics and its success depends critically on sample quality. This unit describes the methodology in a stepwise manner, starting with the induction of cell cycle synchrony and accumulation of dividing cells in mitotic metaphase, and continues with the preparation of suspensions of intact mitotic chromosomes, flow analysis and sorting of chromosomes, and finally processing of the sorted chromosomes. Each step of the protocol is described in detail as some procedures have not been used widely. Supporting histograms are presented as well as hints on dealing with plant material; the utility of sorted chromosomes for plant genomics is also discussed. © 2016 by John Wiley & Sons, Inc.
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Affiliation(s)
- Jan Vrána
- Institute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Petr Cápal
- Institute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Hana Šimková
- Institute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Miroslava Karafiátová
- Institute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Jana Čížková
- Institute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czech Republic
| | - Jaroslav Doležel
- Institute of Experimental Botany, Center of the Region Haná for Biotechnological and Agricultural Research, Olomouc, Czech Republic
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Garda T, Kónya Z, Tándor I, Beyer D, Vasas G, Erdődi F, Vereb G, Papp G, Riba M, M-Hamvas M, Máthé C. Microcystin-LR induces mitotic spindle assembly disorders in Vicia faba by protein phosphatase inhibition and not reactive oxygen species induction. J Plant Physiol 2016; 199:1-11. [PMID: 27186862 DOI: 10.1016/j.jplph.2016.04.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 04/04/2016] [Accepted: 04/04/2016] [Indexed: 06/05/2023]
Abstract
We aimed to reveal the mechanisms of mitotic spindle anomalies induced by microcystin-LR (MCY-LR), a cyanobacterial toxin in Vicia faba, a well-known model in plant cell and molecular biology. MCY-LR inhibits type 1 and 2A phosphoserine/threonine specific protein phosphatases (PP1 and PP2A) and induces reactive oxygen species (ROS) formation. The cytoskeleton is one of the main targets of the cyanotoxin during cytopathogenesis. Histochemical-immunohistochemical and biochemical methods were used. A significant number of MCY-LR induced spindle alterations are described for the first time. Disrupted, multipolar spindles and missing kinetochore fibers were detected both in metaphase and anaphase cells. Additional polar microtubule (MT) bundles, hyperbundling of spindle MTs, monopolar spindles, C-S- shaped, additional and asymmetric spindles were detected in metaphase, while midplane kinetochore fibers were detected in anaphase cells only. Several spindle anomalies induced mitotic disorders, i.e. they occurred concomitantly with altered sister chromatid separation. Alterations were dependent on the MCY-LR dose and exposure time. Under long-term (2 and mainly 6 days') exposure they were detected in the concentration range of 0.1-20μgmL(-1) MCY-LR that inhibited PP1 and PP2A significantly without significant ROS induction. Elevated peroxidase/catalase activities indicated that MCY-LR treated V. faba plants showed efficient defense against oxidative stress. Thus, although the elevation of ROS is known to induce cytoskeletal aberrations in general, this study shows that long-term protein phosphatase inhibition is the primary cause of MCY-LR induced spindle disorders.
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Affiliation(s)
- Tamás Garda
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Zoltán Kónya
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Ildikó Tándor
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Dániel Beyer
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Gábor Vasas
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Ferenc Erdődi
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - György Vereb
- Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Georgina Papp
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Milán Riba
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Márta M-Hamvas
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
| | - Csaba Máthé
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem ter 1, H-4032, Debrecen, Hungary.
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Lou P, Sun X, Zhou J, Zou S. [Effect of RAD18-siRNA on proliferation and chemotherapy sensitivity of human esophageal squamous cell carcinoma ECA-109 cells]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2016; 45:364-370. [PMID: 27868409 PMCID: PMC10400814 DOI: 10.3785/j.issn.1008-9292.2016.07.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Objective: To investigate the effect of RAD18-siRNA on cell proliferation and chemotherapy sensitivity of esophageal squamous cell carcinoma (ESCC) ECA-109 cells. Methods: RAD18-siRNA was transfected into human ECA-109 cells by Lipofectamine 3000. Quantitative PCR and Western blot were performed to detect RAD18 and CyclinD1 expression; CCK-8 assay was used to determine cell proliferation and chemotherapy drug sensitivity; flow cytometry was used to determine cell cycle. Correlation between RAD18 and CyclinD1 mRNA expression was analyzed by Pearson's correlation. Results: Compared with non-transfected cells, the expression of RAD18 in RAD18-siRNA group was significantly decreased (P<0.05). The cell proliferation was inhibited (P<0.05) and the cell number of G1 phase was increased, G2/M phase cells decreased (P<0.05) in RAD18-siRNA group. After treatment with different concentrations of cisplatin or 5-FU, the survival rate of the two cell groups was reduced (all P<0.05), and the IC50 of RAD18-siRNA group was significantly lower than that of non-transfected group (P<0.05). The mRNA expression of RAD18 was positively correlated with CyclinD1 expression in ESCC tissues(r=0.478, P<0.01). Conclusion: Down-regulated expression of RAD18 can decrease the cell proliferation and increase chemo-sensitivity of ESCC cells, and CyclinD1 may participate in the process.
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Affiliation(s)
- Pengrong Lou
- Department of Radio-Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310020, China;Department of Radio-Oncology, Ningbo First Hospital, Ningbo 315010, China
| | - Xiaonan Sun
- Department of Radio-Oncology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310020, China.
| | - Jundong Zhou
- Department of Radio-Oncology, Suzhou Municipal Hospital, Nanjing Medical University, Suzhou 215001, China.
| | - Shitao Zou
- Suzhou Cancer Center Core Laboratory, Suzhou Municipal Hospital, Nanjing Medical University, Suzhou 215001, China
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Wild T, Larsen MSY, Narita T, Schou J, Nilsson J, Choudhary C. The Spindle Assembly Checkpoint Is Not Essential for Viability of Human Cells with Genetically Lowered APC/C Activity. Cell Rep 2016; 14:1829-40. [PMID: 26904940 PMCID: PMC4785794 DOI: 10.1016/j.celrep.2016.01.060] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 12/13/2015] [Accepted: 01/01/2016] [Indexed: 11/18/2022] Open
Abstract
The anaphase-promoting complex/cyclosome (APC/C) and the spindle assembly checkpoint (SAC), which inhibits the APC/C, are essential determinants of mitotic timing and faithful division of genetic material. Activation of the APC/C is known to depend on two APC/C-interacting E2 ubiquitin-conjugating enzymes—UBE2C and UBE2S. We show that APC/C activity in human cells is tuned by the combinatorial use of three E2s, namely UBE2C, UBE2S, and UBE2D. Genetic deletion of UBE2C and UBE2S, individually or in combination, leads to discriminative reduction in APC/C function and sensitizes cells to UBE2D depletion. Reduction of APC/C activity results in loss of switch-like metaphase-to-anaphase transition and, strikingly, renders cells insensitive to chemical inhibition of MPS1 and genetic ablation of MAD2, both of which are essential for the SAC. These results provide insights into the regulation of APC/C activity and demonstrate that the essentiality of the SAC is imposed by the strength of the APC/C. APC/C activity is powered by three E2 enzymes, UBE2S, UBE2C, and UBE2D UBE2S-catalyzed ubiquitylation has an important function in cells lacking UBE2C Reduction in APC/C activity renders the SAC unessential in human cells UBE2C-UBE2S deletion provides synthetic viability to MAD2 deletion
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Affiliation(s)
- Thomas Wild
- Proteomics Program, the Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Marie Sofie Yoo Larsen
- Protein Signaling Program, the Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Takeo Narita
- Proteomics Program, the Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Julie Schou
- Protein Signaling Program, the Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Jakob Nilsson
- Protein Signaling Program, the Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
| | - Chunaram Choudhary
- Proteomics Program, the Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
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16
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Temel A, Gozukirmizi N. CYTOTOXIC EFFECTS OF METAPHASE-ARRESTING METHODS IN BARLEY. Tsitol Genet 2015; 49:43-49. [PMID: 26841493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Metaphase-arresting agents amiprophos-methyl (APM), colchicine (COL) and cell cycle-synchronization (CCS) with APM and hydroxyurea (HU) were tested for growth, metaphase index and cytogenetic abnomalities in barley (Hordeum vulgare cv. Bornova-92). Seeds were germinated for 2 days and then seedlings were treated with 8 μM (2.4 mg/l) APM for 2 h or 1.25 mM (0.5 g/l) COL or synchronized (CCS) with 1.25 mM (95 mg/l) hydroxyurea for 18 h and with 4 μM (1.2 mg/l) APM for 2 h. APM and CCS caused metaphase indices 12.57 and 38.82% respectively. COL also arrested metaphase (14.10%) but also resulted in nuclear aberrations (11.15%). After removal of APM and CCS, cells were released to grow and divide. However, COL caused irreversible effects on cell division and growth and meanwhile was shown to be effective for micronucleus formation.
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17
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Wise CF, Wise SS, Thompson WD, Perkins C, Wise JP. Chromium Is Elevated in Fin Whale (Balaenoptera physalus) Skin Tissue and Is Genotoxic to Fin Whale Skin Cells. Biol Trace Elem Res 2015; 166:108-17. [PMID: 25805270 PMCID: PMC4470778 DOI: 10.1007/s12011-015-0311-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 03/12/2015] [Indexed: 10/23/2022]
Abstract
Hexavalent chromium (Cr(VI)) is present in the marine environment and is a known carcinogen and reproductive toxicant. Cr(VI) is the form of chromium that is well absorbed through the cell membrane. It is also the most prevalent form in seawater. We measured the total Cr levels in skin biopsies obtained from healthy free-ranging fin whales from the Gulf of Maine and found elevated levels relative to marine mammals in other parts of the world. The levels in fin whale biopsies ranged from 1.71 to 19.6 μg/g with an average level of 10.07 μg/g. We also measured the cytotoxicity and genotoxicity of Cr(VI) in fin whale skin cells. We found that particulate and soluble Cr(VI) are both cytotoxic and genotoxic to fin whale skin cells in a concentration-dependent manner. The concentration range used in our cell culture studies used environmentally relevant concentrations based on the biopsy measurements. These data suggest that Cr(VI) may be a concern for whales in the Gulf of Maine.
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Affiliation(s)
- Catherine F. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, ME 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
| | - Sandra S. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, ME 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
| | - W. Douglas Thompson
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
| | - Christopher Perkins
- Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Portland, ME 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, ME 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, Portland, ME 04104, USA
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Roemer E, Zenzen V, Conroy LL, Luedemann K, Dempsey R, Schunck C, Sticken ET. Automation of the in vitro micronucleus and chromosome aberration assay for the assessment of the genotoxicity of the particulate and gas-vapor phase of cigarette smoke. Toxicol Mech Methods 2015; 25:320-33. [PMID: 25986082 DOI: 10.3109/15376516.2015.1037413] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Total particulate matter (TPM) and the gas-vapor phase (GVP) of mainstream smoke from the Reference Cigarette 3R4F were assayed in the cytokinesis-block in vitro micronucleus (MN) assay and the in vitro chromosome aberration (CA) assay, both using V79-4 Chinese hamster lung fibroblasts exposed for up to 24 h. The Metafer image analysis platform was adapted resulting in a fully automated evaluation system of the MN assay for the detection, identification and reporting of cells with micronuclei together with the determination of the cytokinesis-block proliferation index (CBPI) to quantify the treatment-related cytotoxicity. In the CA assay, the same platform was used to identify, map and retrieve metaphases for a subsequent CA evaluation by a trained evaluator. In both the assays, TPM and GVP provoked a significant genotoxic effect: up to 6-fold more micronucleated target cells than in the negative control and up to 10-fold increases in aberrant metaphases. Data variability was lower in the automated version of the MN assay than in the non-automated. It can be estimated that two test substances that differ in their genotoxicity by approximately 30% can statistically be distinguished in the automated MN and CA assays. Time savings, based on man hours, due to the automation were approximately 70% in the MN and 25% in the CA assays. The turn-around time of the evaluation phase could be shortened by 35 and 50%, respectively. Although only cigarette smoke-derived test material has been applied, the technical improvements should be of value for other test substances.
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Affiliation(s)
- Ewald Roemer
- a Philip Morris Products S.A., Philip Morris International R&D , Neuchâtel , Switzerland
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Riepsamen A, Wu L, Lau L, Listijono D, Ledger W, Sinclair D, Homer H. Nicotinamide impairs entry into and exit from meiosis I in mouse oocytes. PLoS One 2015; 10:e0126194. [PMID: 25938585 PMCID: PMC4418673 DOI: 10.1371/journal.pone.0126194] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 03/30/2015] [Indexed: 11/18/2022] Open
Abstract
Following exit from meiosis I, mammalian oocytes immediately enter meiosis II without an intervening interphase, accompanied by rapid reassembly of a bipolar spindle that maintains condensed chromosomes in a metaphase configuration (metaphase II arrest). Here we study the effect of nicotinamide (NAM), a non-competitive pan-sirtuin inhibitor, during meiotic maturation in mouse oocytes. Sirtuins are a family of seven NAD+-dependent deacetylases (Sirt1-7), which are involved in multiple cellular processes and are emerging as important regulators in oocytes and embryos. We found that NAM significantly delayed entry into meiosis I associated with delayed accumulation of the Cdk1 co-activator, cyclin B1. GVBD was also inhibited by the Sirt2-specific inhibitor, AGK2, and in a very similar pattern to NAM, supporting the notion that as in somatic cells, NAM inhibits sirtuins in oocytes. NAM did not affect subsequent spindle assembly, chromosome alignment or the timing of first polar body extrusion (PBE). Unexpectedly, however, in the majority of oocytes with a polar body, chromatin was decondensed and a nuclear structure was present. An identical phenotype was observed when flavopiridol was used to induce Cdk1 inactivation during late meiosis I prior to PBE, but not if Cdk1 was inactivated after PBE when metaphase II arrest was already established, altogether indicating that NAM impaired establishment rather than maintenance of metaphase II arrest. During meiosis I exit in NAM-treated medium, we found that cyclin B1 levels were lower and inhibitory Cdk1 phosphorylation was increased compared with controls. Although activation of the anaphase-promoting complex-Cdc20 (APC-Cdc20) occurred on-time in NAM-treated oocytes, Cdc20 levels were higher in very late meiosis I, pointing to exaggerated APC-Cdc20-mediated proteolysis as a reason for lower cyclin B1 levels. Collectively, therefore, our data indicate that by disrupting Cdk1 regulation, NAM impairs entry into meiosis I and the establishment of metaphase II arrest.
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Affiliation(s)
- Angelique Riepsamen
- School of Women’s & Children’s Health, University of New South Wales, Sydney, New South Wales, Australia
| | - Lindsay Wu
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Laurin Lau
- School of Women’s & Children’s Health, University of New South Wales, Sydney, New South Wales, Australia
| | - Dave Listijono
- School of Women’s & Children’s Health, University of New South Wales, Sydney, New South Wales, Australia
| | - William Ledger
- School of Women’s & Children’s Health, University of New South Wales, Sydney, New South Wales, Australia
| | - David Sinclair
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
- Genetics Department, Harvard Medical School, Boston, Massachusetts, United States of America
- Glenn Labs for the Biological Mechanisms of Aging, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Hayden Homer
- School of Women’s & Children’s Health, University of New South Wales, Sydney, New South Wales, Australia
- * E-mail:
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Wise SS, Xie H, Fukuda T, Douglas Thompson W, Wise JP. Hexavalent chromium is cytotoxic and genotoxic to hawksbill sea turtle cells. Toxicol Appl Pharmacol 2014; 279:113-8. [PMID: 24952338 PMCID: PMC4134996 DOI: 10.1016/j.taap.2014.06.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 05/30/2014] [Accepted: 06/08/2014] [Indexed: 11/20/2022]
Abstract
Sea turtles are a charismatic and ancient ocean species and can serve as key indicators for ocean ecosystems, including coral reefs and sea grass beds as well as coastal beaches. Genotoxicity studies in the species are absent, limiting our understanding of the impact of environmental toxicants on sea turtles. Hexavalent chromium (Cr(VI)) is a ubiquitous environmental problem worldwide, and recent studies show it is a global marine pollutant of concern. Thus, we evaluated the cytotoxicity and genotoxicity of soluble and particulate Cr(VI) in hawksbill sea turtle cells. Particulate Cr(VI) was both cytotoxic and genotoxic to sea turtle cells. Concentrations of 0.1, 0.5, 1, and 5μg/cm(2) lead chromate induced 108, 79, 54, and 7% relative survival, respectively. Additionally, concentrations of 0, 0.1, 0.5, 1, and 5μg/cm(2) lead chromate induced damage in 4, 10, 15, 26, and 36% of cells and caused 4, 11, 17, 30, and 56 chromosome aberrations in 100 metaphases, respectively. For soluble Cr, concentrations of 0.25, 0.5, 1, 2.5, and 5μM sodium chromate induced 84, 69, 46, 25, and 3% relative survival, respectively. Sodium chromate induced 3, 9, 9, 14, 21, and 29% of metaphases with damage, and caused 3, 10, 10, 16, 26, and 39 damaged chromosomes in 100 metaphases at concentrations of 0, 0.25, 0.5, 1, 2.5, and 5μM sodium chromate, respectively. These data suggest that Cr(VI) may be a concern for hawksbill sea turtles and sea turtles in general.
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Affiliation(s)
- Sandra S Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
| | - Hong Xie
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
| | - Tomokazu Fukuda
- Graduate School of Agricultural Sciences, Tohoku University, Laboratory of Animal Breeding and Genetics, Second Research Building, Rm 112, 1-1 Amamiyamachi, Aoba-ku, Sendai 981-8555, Japan.
| | - W Douglas Thompson
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Maine Center for Toxicology and Environmental Health, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA; Department of Applied Medical Science, University of Southern Maine, Science Building, 96 Falmouth Street, Portland, ME 04103, USA.
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Vandekerckhove F, Gerris J, Vansteelandt S, De Baerdemaeker A, Tilleman K, De Sutter P. Delaying the oocyte maturation trigger by one day leads to a higher metaphase II oocyte yield in IVF/ICSI: a randomised controlled trial. Reprod Biol Endocrinol 2014; 12:31. [PMID: 24758641 PMCID: PMC4008411 DOI: 10.1186/1477-7827-12-31] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Accepted: 04/17/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The negative impact of rising progesterone levels on pregnancy rates is well known, but data on mature oocyte yield are conflicting. We examined whether delaying the oocyte maturation trigger in IVF/ICSI affected the number of mature oocytes and investigated the potential influence of serum progesterone levels in this process. METHODS Between January 31, 2011, and December 31, 2011, 262 consecutive patients were monitored using ultrasound plus hormonal evaluation. Those with > =3 follicles with a mean diameter of > =18 mm were divided into 2 groups depending on their serum progesterone levels. In cases with a progesterone level < = 1 ng/ml, which was observed in 59 patients, 30-50% of their total number of follicles (only counting those larger than 10 mm) were at least 18 mm in diameter. These patients were randomised into 2 groups: in one group, final oocyte maturation was triggered the same day; for the other, maturation was triggered 24 hours later. Seventy-two patients with progesterone levels > 1 ng/ml were randomised in the same manner, irrespective of the percentage of larger follicles (> = 18 mm). The number of metaphase II oocytes was our primary outcome variable. Because some patients were included more than once, correction for duplicate patients was performed. RESULTS In the study arm with low progesterone (<= 1 ng/ml), the mean number of metaphase II oocytes (+/-SD) was 10.29 (+/-6.35) in the group with delayed administration of the oocyte maturation trigger versus 7.64 (+/-3.26) in the control group. After adjusting for age, the mean difference was 2.41 (95% CI: 0.22-4.61; p = 0.031). In the study arm with elevated progesterone (>1 ng/ml), the mean numbers of metaphase II oocytes (+/-SD) were 11.81 (+/-9.91) and 12.03 (+/-7.09) for the delayed and control groups, respectively. After adjusting for PCOS (polycystic ovary syndrome) and female pathology, the mean difference was -0.44 (95% CI: -3.65-2.78; p = 0.79). CONCLUSIONS Delaying oocyte maturation in patients with low progesterone levels yields greater numbers of mature oocytes.
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Affiliation(s)
- Frank Vandekerckhove
- Centre for Reproductive Medicine, University Hospital Ghent, De Pintelaan 185, Gent 9000, Belgium
| | - Jan Gerris
- Centre for Reproductive Medicine, University Hospital Ghent, De Pintelaan 185, Gent 9000, Belgium
| | - Stijn Vansteelandt
- Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Krijgslaan 281 S9, Gent 9000, Belgium
| | - An De Baerdemaeker
- Centre for Reproductive Medicine, University Hospital Ghent, De Pintelaan 185, Gent 9000, Belgium
| | - Kelly Tilleman
- Centre for Reproductive Medicine, University Hospital Ghent, De Pintelaan 185, Gent 9000, Belgium
| | - Petra De Sutter
- Centre for Reproductive Medicine, University Hospital Ghent, De Pintelaan 185, Gent 9000, Belgium
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Gómez R, Viera A, Berenguer I, Llano E, Pendás AM, Barbero JL, Kikuchi A, Suja JA. Cohesin removal precedes topoisomerase IIα-dependent decatenation at centromeres in male mammalian meiosis II. Chromosoma 2014; 123:129-46. [PMID: 24013524 DOI: 10.1007/s00412-013-0434-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 07/11/2013] [Accepted: 08/13/2013] [Indexed: 12/26/2022]
Abstract
Sister chromatid cohesion is regulated by cohesin complexes and topoisomerase IIα. Although relevant studies have shed some light on the relationship between these two mechanisms of cohesion during mammalian mitosis, their interplay during mammalian meiosis remains unknown. In the present study, we have studied the dynamics of topoisomerase IIα in relation to that of the cohesin subunits RAD21 and REC8, the shugoshin-like 2 (Schizosaccharomyces pombe) (SGOL2) and the polo-like kinase 1-interacting checkpoint helicase (PICH), during both male mouse meiotic divisions. Our results strikingly show that topoisomerase IIα appears at stretched strands connecting the sister kinetochores of segregating early anaphase II chromatids, once the cohesin complexes have been removed from the centromeres. Moreover, the number and length of these topoisomerase IIα-connecting strands increase between lagging chromatids at anaphase II after the chemical inhibition of the enzymatic activity of topoisomerase IIα by etoposide. Our results also show that the etoposide-induced inhibition of topoisomerase IIα is not able to rescue the loss of centromere cohesion promoted by the absence of the shugoshin SGOL2 during anaphase I. Taking into account our results, we propose a two-step model for the sequential release of centromeric cohesion during male mammalian meiosis II. We suggest that the cohesin removal is a prerequisite for the posterior topoisomerase IIα-mediated resolution of persisting catenations between segregating chromatids during anaphase II.
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Affiliation(s)
- Rocío Gómez
- Unidad de Biología Celular, Departamento de Biología, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
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Selenti N, Sofocleous C, Kattamis A, Kolialexi A, Kitsiou S, Fryssira E, Polychronopoulou S, Kanavakis E, Mavrou A. Investigation of FANCA mutations in Greek patients. Anticancer Res 2013; 33:3369-3374. [PMID: 23898106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Fanconi anemia (FA) is a rare genetic disease characterized by considerable heterogeneity. Fifteen subtypes are currently recognised and deletions of the Fanconi anemia complementation group A (FANCA) gene account for more than 65% of FA cases. We report on the results from a cohort of 166 patients referred to the Department of Medical Genetics of Athens University for genetic investigation after the clinical suspicion of FA. MATERIALS AND METHODS For clastogen-induced chromosome damage, cultures were set up with the addition of mitomycin C (MMC) and diepoxybutane (DEB), respectively. Following a positive cytogenetic result, molecular analysis was performed to allow identification of causative mutations in the FANCA gene. RESULTS A total of 13/166 patients were diagnosed with FA and 8/13 belonged to the FA-A subtype. A novel point mutation was identified in exon 26 of FANCA gene. CONCLUSION In our study 62% of FA patients were classified in the FA-A subtype and a point mutation in exon 26 was noted for the first time.
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Affiliation(s)
- Nikoletta Selenti
- Aghia Sophia Children's Hospital, Department of Medical Genetics, Athens University School of Medicine, Thivon and Levadeias 11527, Goudi, Athens, 2nd floor, Room 26, Greece.
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Banerjee J, Shaeib F, Maitra D, Saed GM, Dai J, Diamond MP, Abu-Soud HM. Peroxynitrite affects the cumulus cell defense of metaphase II mouse oocytes leading to disruption of the spindle structure in vitro. Fertil Steril 2013; 100:578-84.e1. [PMID: 23721714 DOI: 10.1016/j.fertnstert.2013.04.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Revised: 04/02/2013] [Accepted: 04/16/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To demonstrate the effects of peroxynitrite (ONOO(-)) on metaphase II mouse oocyte spindle structure and chromosomal alignment in presence and absence of cumulus cells. DESIGN Experimental study. SETTING University-based research laboratory. ANIMAL(S) Metaphase II mouse oocytes (n = 440). INTERVENTION(S) Metaphase II mouse oocytes, with and without cumulus cells, were exposed to ONOO(-), nitrite/nitrate, the final product of ONOO(-), and nontreated controls for 15 minutes. Oocytes were fixed and subjected to indirect immunofluorescence for detecting changes in the spindle and chromosomal alignment. Viability staining in exposed oocytes with and without cumulus cells was performed using the trypan blue dye exclusion method and compared with controls. MAIN OUTCOME MEASURE(S) Scoring the alterations in spindle and chromosomal alignment using immunofluorescent and confocal microscopy based on a previously validated system. RESULT(S) Most oocytes had poor scores for the spindle and chromosomal alignment with exposure to ONOO(-) in a dose-dependent manner compared with controls. Trypan blue staining revealed that most of the cumulus cells failed to survive treatment with ONOO(-) compared with controls. CONCLUSION(S) ONOO(-) affects the viability of cumulus cells and the oocyte spindle structure in a dose-dependent manner. Collectively, these effects compromise oocyte quality, which may lead to female infertility.
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Affiliation(s)
- Jashoman Banerjee
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, Michigan 48201, USA
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Shaeib F, Banerjee J, Maitra D, Diamond MP, Abu-Soud HM. Impact of hydrogen peroxide-driven Fenton reaction on mouse oocyte quality. Free Radic Biol Med 2013; 58:154-9. [PMID: 23261938 PMCID: PMC4482232 DOI: 10.1016/j.freeradbiomed.2012.12.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 12/07/2012] [Accepted: 12/10/2012] [Indexed: 12/12/2022]
Abstract
Here we show that hydroxyl radical ((•)OH) generated through the Fenton reaction alters metaphase-II mouse oocyte microtubules (MT) and chromosomal alignment (CH). Metaphase-II mouse oocytes, obtained commercially, were grouped as follows: control, hydrogen peroxide (H2O2), Fe(II), and combined (Fe(II) +H2O2) treatments. After 7-10 min of incubation at 37 °C, MT and CH were evaluated on fixed and stained oocytes and scored by two blinded observers. Pearson χ(2) test and Fisher exact test were used to compare outcomes between controls and treated groups and also among the treated groups. Our results showed that poor scores for MT and CH increased significantly in oocytes treated with a combination of H2O2 and Fe(II) (p<0.001); oocytes treated with H2O2 alone or Fe(II) alone showed no or few changes compared to control. Comparison of oocyte groups that received increasing concentrations of H2O2 and a fixed amount of Fe(II) showed that 70-80% demonstrated poor scores in both MT and CH when pretreated with 5 μM H2O2, and this increased up to 90-100% when treated with 10-20 μM H2O2. Hydroxyl radical generated by H2O2-driven Fenton reaction deteriorates the metaphase-II mouse oocyte spindle and CH alignment, which is thought to be a potential cause of poor oocyte quality. Thus, free iron and/or ROS scavengers could attenuate the (•)OH-mediated spindle and chromosomal damage, thereby serving as a possible approach for further examination as a therapeutic option in inflammatory states.
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Affiliation(s)
| | | | | | | | - Husam M. Abu-Soud
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, Michigan 48201
- Address correspondence to: Husam M Abu-Soud, Ph.D Wayne State University School of Medicine, Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, 275 E. Hancock Detroit, MI 48201, Tel. 313 577-6178, Fax. 313 577-8554,
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Latagliata R, Isidori A, Breccia M, Carmosino I, Vozella F, Volpicelli P, Finsinger P, Barulli S, Loglisci G, Santopietro M, Federico V, Diverio D, Nanni M, Mancini M, Visani G, Alimena G. Complete clearance of Ph+ metaphases after 3 months is a very early indicator of good response to imatinib as front-line treatment in chronic myelogenous leukemia. Acta Haematol 2013. [PMID: 23207803 DOI: 10.1159/000343384] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AIM To address the incidence and the prognostic role of a very early standard complete cytogenetic response (CCyR) or all Ph- metaphases (MET-, when <20 cells were evaluable). METHODS We revised 182 chronic phase chronic myelogenous leukemia patients treated with frontline imatinib (IM) at two institutions from June 2002 to June 2011. RESULTS After 3 months of treatment, 138 patients (75.8%) achieved CCyR/MET- while 44 patients (24.2%) still presented Ph+ metaphases (MET+) (<33%, 24 patients; ≥33%, 20 patients). On univariate analysis, palpable spleen enlargement (p < 0.001), WBC count >100.0 × 10(9)/l at onset (p < 0.001), and male gender (p = 0.019) had a negative impact on achievement of CCyR/MET- at 3 months. Among patients with CCyR/MET- after 3 months, there were 15 failures (10.8%) compared to 21 (47.7%) among patients with MET+ (p < 0.001). The 5-year overall survival was 97.0% in patients CCyR/MET- at 3 months and 91.8% in patients MET+ at 3 months (p = 0.277); the 5-year progression-free survival was 88.2% in patients CCyR/MET- at 3 months and 48.4% in patients MET+ at 3 months (p < 0.001). CONCLUSIONS The achievement of CCyR/MET- at 3 months seems to have prognostic relevance and could be a very early and useful indicator of an excellent response to IM beyond European LeukemiaNet guidelines.
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Affiliation(s)
- Roberto Latagliata
- Department of Cellular Biotechnology and Hematology, La Sapienza University, Rome, Italy.
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Piroli A, Marci R, Marinangeli F, Paladini A, Di Emidio G, Giovanni Artini P, Caserta D, Tatone C. Comparison of different anaesthetic methodologies for sedation during in vitro fertilization procedures: effects on patient physiology and oocyte competence. Gynecol Endocrinol 2012; 28:796-9. [PMID: 22420562 DOI: 10.3109/09513590.2012.664193] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The main goal of the present retrospective study is to compare four analgesic methodologies (EMLA cream, propofol, thiopental sodium, sevoflurane) for in vitro fertilization (IVF) oocyte retrieval. We found that most anaesthetic parameters were not significantly different among all treatments. In contrast, significant differences were revealed in all groups for total number of oocytes retrieved per patient, rate of mature oocytes at metaphase II stage (MII) and percentage of fertilization and embryo development. In the EMLA cream and thiopental sodium groups we observed the highest percentage of MII oocytes (P < 0.001). Fertilization rate in the EMLA and sevoflurane groups were similar but significantly higher than the propofol and thiopental sodium groups (P < 0.001). The highest rate of anomalous fertilization was observed in the propofol group. Rate of embryo development was similar in all groups but sevoflurane group had a lower percentage of good embryos. In conclusion, by comparing different anaesthetic techniques with different mechanisms of action and administration, potential negative effects of these drugs on the initial stages of human IVF procedure were revealed. Therefore, a local anaesthetic cream is proposed as an acceptable alternative option for anaesthesia during transvaginal oocyte retrieval.
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Affiliation(s)
- Alba Piroli
- Department of Anaesthesiology, Intensive Care and Pain Medicine, University of L'Aquila, L'Aquila, Italy
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Banerjee J, Maitra D, Diamond MP, Abu-Soud HM. Melatonin prevents hypochlorous acid-induced alterations in microtubule and chromosomal structure in metaphase-II mouse oocytes. J Pineal Res 2012; 53:122-8. [PMID: 22304486 DOI: 10.1111/j.1600-079x.2012.00977.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hypochlorous acid (HOCl) is generated by myeloperoxidase, using chloride and hydrogen peroxide as substrates. Here we demonstrate that HOCl alters metaphase-II mouse oocyte microtubules and chromosomal (CH) alignment which can be prevented by melatonin. Metaphase-II mouse oocytes, obtained commercially, were grouped as: control, melatonin (150, 200nmol/mL), HOCl (10, 20, 50, and 100nmol/mL), and HOCl (50nmol/mL) pretreated with 150 and 200 nmol/mL of melatonin. Microtubule and CH alignment was studied utilizing an indirect immunofluorescence technique and scored by two observers. Pearson chi-square test and Fisher's exact test were used to compare outcomes between controls and treated groups and also among each group. Poor scores for the spindle and chromosomes increased significantly at 50nmol/mL of HOCl (P<0.001). Oocytes treated with melatonin only at 150 and 200 nmol/mL showed no changes; significant differences (P<0.001) were observed when oocytes exposed to 50nmol/mL of HOCl were compared to oocytes pretreated with 200 nmol/mL melatonin. Fifty percent of the oocytes demonstrated good scores, both in microtubule and CH alterations, when pretreated with melatonin at 150 nmol/mL compared to 0% in the HOCl-only group. HOCl alters the metaphase-II mouse oocyte spindle and CH alignment in a dose-dependant manner, which might be a potential cause of poor oocyte quality (e.g., in patients with endometriosis). Melatonin prevented the HOCl-mediated spindle and CH damage, and therefore, may be an attractive therapeutic option to prevent oocyte damage in endometriosis or inflammatory diseases where HOCl levels are known to be elevated.
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Affiliation(s)
- Jashoman Banerjee
- Department of Obstetrics and Gynecology, The C.S. Mott Center for Human Growth and Development, Detroit, MI 48201, USA
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Matsui Y, Nakayama Y, Okamoto M, Fukumoto Y, Yamaguchi N. Enrichment of cell populations in metaphase, anaphase, and telophase by synchronization using nocodazole and blebbistatin: a novel method suitable for examining dynamic changes in proteins during mitotic progression. Eur J Cell Biol 2012; 91:413-9. [PMID: 22365812 DOI: 10.1016/j.ejcb.2011.12.008] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 12/22/2011] [Accepted: 12/28/2011] [Indexed: 11/19/2022] Open
Abstract
Mitosis is a continuous process to separate replicated chromosomes into two daughter cells through prophase, metaphase, anaphase, and telophase. Although a number of methods have been established to synchronize cells at different phases of the cell cycle, it is difficult to synchronize cells at the specific phases, anaphase and telophase, during mitosis because of the short duration of anaphase. Here, we show that HeLa S3 cells in anaphase and in telophase are successfully enriched by treatment with a combination of low concentrations of the microtubule-depolymerizing agent nocodazole and the myosin II inhibitor blebbistatin. After 9-h release from thymidine block at G1/S phase, addition of nocodazole at 20 ng/ml but not 40 ng/ml ensures rapid release from the nocodazole arrest. Subsequently, the cells are cultured in the presence of 50 μM blebbistatin for 20 and 50 min to enrich cells in anaphase and telophase, respectively. Western blot analysis verifies down-regulation of phospho-histone H3-Ser10, phospho-Aurora A/B/C, and cyclin B1 during M-phase progression. Furthermore, we show how the electrophoretic mobility shifts of the Src-family kinases c-Yes and c-Src can change in each phase of mitosis. These results provide a useful synchronization method for biochemically examining protein dynamics during M-phase progression.
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Affiliation(s)
- Yuki Matsui
- Department of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8675, Japan
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Truta E, Vochita G, Rosu CM, Zamfirache MM, Olteanu Z. Evaluation of Roundup-induced toxicity on genetic material and on length growth of barley seedlings. Acta Biol Hung 2011; 62:290-301. [PMID: 21840831 DOI: 10.1556/abiol.62.2011.3.8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The study was performed in order to evaluate Roundup-induced genotoxic effects in Hordeum vulgare L. cv. Madalin root meristems and to analyze herbicide impact on length growth of barley seedlings. Caryopses were treated for 3 hours and 6 hours with 0.1%, 0.5%, 1.0% and 2.0% Roundup solutions (v/v), containing 0.36 mg ml-1, 1.8 mg ml-1, 3.6 mg ml-1 and 7.2 mg ml-1 glyphosate active ingredient. Mitotic index decreased in both exposure times with concentration increase. In 3-h treatment, its average values decreased from 4.73 ± 0.31% to 1.51 ± 0.43%, whereas in 6-h treatment this parameter declined from 3.86 ± 0.92% to 0.62 ± 0.15%. The highest ana-telophase aberration rates were noted in 3-h treatments (8.91%, 9.19%, 9.47%, 11.25%, comparatively to control - 5.99%). Roundup enhanced the number of metaphase disturbances proving its noxious effect on normal functioning of mitotic spindle. Seedling growth was negatively influenced at all tested concentrations in both exposure times. The length decreased as concentration increased, so that the average length is 7.5-9 times smaller than in control at the maximum concentration, in both exposures.
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Affiliation(s)
- Elena Truta
- Biological Research Institute, Iasi, Romania.
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Takeda K, Mori A, Yanagida M. Identification of genes affecting the toxicity of anti-cancer drug bortezomib by genome-wide screening in S. pombe. PLoS One 2011; 6:e22021. [PMID: 21760946 PMCID: PMC3132776 DOI: 10.1371/journal.pone.0022021] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 06/12/2011] [Indexed: 01/06/2023] Open
Abstract
Bortezomib/PS-341/Velcade, a proteasome inhibitor, is widely used to treat multiple myeloma. While several mechanisms of the cytotoxicity of the drug were proposed, the actual mechanism remains elusive. We aimed to identify genes affecting the cytotoxicity of Bortezomib in the fission yeast S.pombe as the drug inhibits this organism's cell division cycle like proteasome mutants. Among the 2815 genes screened (covering 56% of total ORFs), 19 genes, whose deletions induce strong synthetic lethality with Bortezomib, were identified. The products of the 19 genes included four ubiquitin enzymes and one nuclear proteasome factor, and 13 of them are conserved in humans. Our results will provide useful information for understanding the actions of Bortezomib within cells.
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Affiliation(s)
- Kojiro Takeda
- G0 Cell Unit, Okinawa Institute of Science and Technology, Okinawa, Japan.
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Wei Y, Multi S, Yang CR, Ma J, Zhang QH, Wang ZB, Li M, Wei L, Ge ZJ, Zhang CH, Ouyang YC, Hou Y, Schatten H, Sun QY. Spindle assembly checkpoint regulates mitotic cell cycle progression during preimplantation embryo development. PLoS One 2011; 6:e21557. [PMID: 21720555 PMCID: PMC3123354 DOI: 10.1371/journal.pone.0021557] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 06/01/2011] [Indexed: 12/21/2022] Open
Abstract
Errors in chromosome segregation or distribution may result in aneuploid embryo formation, which causes implantation failure, spontaneous abortion, genetic diseases, or embryo death. Embryonic aneuploidy occurs when chromosome aberrations are present in gametes or early embryos. To date, it is still unclear whether the spindle assembly checkpoint (SAC) is required for the regulation of mitotic cell cycle progression to ensure mitotic fidelity during preimplantation development. In this study, using overexpression and RNA interference (RNAi) approaches, we analyzed the role of SAC components (Bub3, BubR1 and Mad2) in mouse preimplantation embryos. Our data showed that overexpressed SAC components inhibited metaphase-anaphase transition by preventing sister chromatid segregation. Deletion of SAC components by RNAi accelerated the metaphase-anaphase transition during the first cleavage and caused micronuclei formation, chromosome misalignment and aneuploidy, which caused decreased implantation and delayed development. Furthermore, in the presence of the spindle-depolymerizing drug nocodazole, SAC depleted embryos failed to arrest at metaphase. Our results suggest that SAC is essential for the regulation of mitotic cell cycle progression in cleavage stage mouse embryos.
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Affiliation(s)
- Yanchang Wei
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Saima Multi
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Cai-Rong Yang
- College of Life Science, Northeast Agricultural University of China, Harbin, China
| | - Junyu Ma
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- College of Life Science, Northeast Agricultural University of China, Harbin, China
| | - Qing-Hua Zhang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Zhen-Bo Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Mo Li
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Liang Wei
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Zhao-Jia Ge
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Chun-Hui Zhang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Ying-Chun Ouyang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Yi Hou
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Heide Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri, United States of America
| | - Qing-Yuan Sun
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- * E-mail:
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Takeuchi R, Matsumoto H, Akimoto Y, Fujii A. Reduction in lipopolysaccharide-induced apoptosis of fibroblasts obtained from a patient with gingival overgrowth during nifedipine-treatment. Arch Oral Biol 2011; 56:1073-80. [PMID: 21474118 DOI: 10.1016/j.archoralbio.2011.03.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Revised: 01/25/2011] [Accepted: 03/12/2011] [Indexed: 11/17/2022]
Abstract
OBJECTIVE We have previously demonstrated that the mechanism of nifedipine (NIF)-induced gingival overgrowth is related to the observation that proliferation and cell cycle progression of gingival fibroblasts derived from NIF reactive patient (NIFr) are greater than those from NIF non-reactive patient (NIFn). Gingival overgrowth has also been reported to be a result of inhibited apoptosis of gingival fibroblasts. Apoptosis in fibroblasts is induced by lipopolysaccharide (LPS). Thus, we focused upon evaluating whether there is a difference in LPS-induced apoptosis between NIFn and NIFr. METHODS Both NIFn and NIFr were arrested in DMEM containing 0.5% FBS, stimulated by LPS, and assayed for apoptosis, cell cycle analysis, Western blotting, and caspase activity. RESULTS Compared to NIFn, the number of apoptotic cells was significantly decreased and the percentage of cells in S and G(2)/M phase was significantly increased in NIFr. The levels of Bax and cytochrome c proteins in NIFr were not up-regulated by LPS compared with NIFn. Both NIFn and NIFr displayed the following changes in protein expression: increased Bad, decreased Bcl-xL, and unchanged Bcl-2 and p53. Caspase-3 and -9 activities were significantly increased by LPS in NIFn but were unchanged in NIFr. Caspase-2 activity remained constant whilst caspase-8 activity significantly increased upon LPS treatment in both NIFn and NIFr. CONCLUSION Bad, Bax, cytochrome c, p53, and caspases-2, -3, -8, and -9 are pro-apoptotic proteins. Bcl-2 and Bcl-xL are anti-apoptotic proteins. Thus, the mechanism of NIF-induced gingival overgrowth might be related to decreased apoptosis in NIFr through a reduction of Bax, cytochrome c, and caspase-3 and -9.
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Affiliation(s)
- Reiri Takeuchi
- Department of Oral Molecular Pharmacology, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-Nishi, Matsudo, Chiba 271-8587, Japan.
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Hashemi J, Worrall C, Vasilcanu D, Fryknäs M, Sulaiman L, Karimi M, Weng WH, Lui WO, Rudduck C, Axelson M, Jernberg-Wiklund H, Girnita L, Larsson O, Larsson C. Molecular characterization of acquired tolerance of tumor cells to picropodophyllin (PPP). PLoS One 2011; 6:e14757. [PMID: 21423728 PMCID: PMC3056661 DOI: 10.1371/journal.pone.0014757] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Accepted: 02/06/2011] [Indexed: 11/18/2022] Open
Abstract
Background Picropodophyllin (PPP) is a promising novel anti-neoplastic agent that efficiently kills tumor cells in vitro and causes tumor regression and increased survival in vivo. We have previously reported that PPP treatment induced moderate tolerance in two out of 10 cell lines only, and here report the acquired genomic and expression alterations associated with PPP selection over 1.5 years of treatment. Methodology/Principal Findings Copy number alterations monitored using metaphase and array-based comparative genomic hybridization analyses revealed largely overlapping alterations in parental and maximally tolerant cells. Gain/ amplification of the MYC and PVT1 loci in 8q24.21 were verified on the chromosome level. Abnormalities observed in connection to PPP treatment included regular gains and losses, as well as homozygous losses in 10q24.1-q24.2 and 12p12.3-p13.2 in one of the lines and amplification at 5q11.2 in the other. Abnormalities observed in both tolerant derivatives include amplification/gain of 5q11.2, gain of 11q12.1-q14.3 and gain of 13q33.3-qter. Using Nexus software analysis we combined the array-CGH data with data from gene expression profilings and identified genes that were altered in both inputs. A subset of genes identified as downregulated (ALDH1A3, ANXA1, TLR4 and RAB5A) or upregulated (COX6A1, NFIX, ME1, MAPK and TAP2) were validated by siRNA in the tolerant or parental cells to alter sensitivity to PPP and confirmed to alter sensitivity to PPP in further cell lines. Conclusions Long-term PPP selection lead to altered gene expression in PPP tolerant cells with increase as well as decrease of genes involved in cell death such as PTEN and BCL2. In addition, acquired genomic copy number alterations were observed that were often reflected by altered mRNA expression levels for genes in the same regions.
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Affiliation(s)
- Jamileh Hashemi
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, CMM L8:01, Stockholm, Sweden.
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Abstract
Metaphase chromosome studies in multiple myeloma (MM) are performed as part of the diagnostic workup, as surveillance to monitor the therapeutic response, and at relapse to help direct therapy. Unfortunately, the abnormal clones in many patients have a low proliferative activity and therefore, in many cases, the analyzable metaphase cells are derived from normal hematopoiesis. This limitation has been overcome in part by the use of fluorescence in situ hybridization (FISH) of interphase nuclei, which is an important adjunct to metaphase analysis. However, the metaphase karyotype remains the primary cytogenetic tool used at our institute for diagnostic and prognostic purposes. To maximize the possibility of detecting abnormal cells in conventional metaphase studies, we routinely employ at least three different cell harvest techniques on each marrow specimen. These include a direct harvest, a 24 h culture, and either a synchronized or unsynchronized 48 h culture. Recently, fine needle aspirates of solitary plasmacytomas guided by magnetic-resonance imaging have also been shown to provide diagnostic metaphase karyotypes. Regardless of the origin or quality of the specimen, some uninformative cytogenetic results may simply be due to insufficient number and type of cultures being initiated and subsequently examined.
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Affiliation(s)
- Jeffrey R Sawyer
- Department of Pathology, Myeloma Institute for Research and Therapy, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
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Campbell LJ. Cytogenetics of myeloproliferative neoplasms. Methods Mol Biol 2011; 730:89-98. [PMID: 21431636 DOI: 10.1007/978-1-61779-074-4_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The introduction of JAK2 mutation testing has changed dramatically the diagnostic algorithms for myeloproliferative neoplasms (MPNs) but there is still a place for conventional cytogenetic analysis in the initial work-up of MPN cases, particularly as this group of myeloid disorders has been expanded to include chronic eosinophilic leukaemia and myeloid neoplasms with abnormalities of the PDGFRA, PDGFRB, and FGFR1 genes. Mastocytosis is also included under the umbrella of MPN but the cytogenetic abnormalities observed usually reflect any associated clonal haematological non-mast cell lineage disease.
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Affiliation(s)
- Lynda J Campbell
- Victorian Cancer Cytogenetics Service, St. Vincent's Hospital Melbourne, Fitzroy, VIC, Australia.
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Zeng X, Sigoillot F, Gaur S, Choi S, Pfaff KL, Oh DC, Hathaway N, Dimova N, Cuny GD, King RW. Pharmacologic inhibition of the anaphase-promoting complex induces a spindle checkpoint-dependent mitotic arrest in the absence of spindle damage. Cancer Cell 2010; 18:382-95. [PMID: 20951947 PMCID: PMC2957475 DOI: 10.1016/j.ccr.2010.08.010] [Citation(s) in RCA: 242] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Revised: 07/01/2010] [Accepted: 08/10/2010] [Indexed: 12/13/2022]
Abstract
Microtubule inhibitors are important cancer drugs that induce mitotic arrest by activating the spindle assembly checkpoint (SAC), which, in turn, inhibits the ubiquitin ligase activity of the anaphase-promoting complex (APC). Here, we report a small molecule, tosyl-L-arginine methyl ester (TAME), which binds to the APC and prevents its activation by Cdc20 and Cdh1. A prodrug of TAME arrests cells in metaphase without perturbing the spindle, but nonetheless the arrest is dependent on the SAC. Metaphase arrest induced by a proteasome inhibitor is also SAC dependent, suggesting that APC-dependent proteolysis is required to inactivate the SAC. We propose that mutual antagonism between the APC and the SAC yields a positive feedback loop that amplifies the ability of TAME to induce mitotic arrest.
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Affiliation(s)
- Xing Zeng
- Department of Cell Biology, 240 Longwood Ave, Harvard Medical School, Boston, MA
| | - Frederic Sigoillot
- Department of Cell Biology, 240 Longwood Ave, Harvard Medical School, Boston, MA
| | - Shantanu Gaur
- Department of Cell Biology, 240 Longwood Ave, Harvard Medical School, Boston, MA
| | - Sungwoon Choi
- Laboratory for Drug Discovery in Neurodegeneration, Brigham & Women's Hospital and Harvard Medical School, 65 Landsdowne St, Cambridge, MA
| | - Kathleen L. Pfaff
- Department of Cell Biology, 240 Longwood Ave, Harvard Medical School, Boston, MA
| | - Dong-Chan Oh
- Department of Biological Chemistry and Molecular Pharmacology, 240 Longwood Ave, Harvard Medical School, Boston, MA
- Natural Products Research Institute, College of Pharmacy, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Nathaniel Hathaway
- Department of Cell Biology, 240 Longwood Ave, Harvard Medical School, Boston, MA
| | - Nevena Dimova
- Department of Cell Biology, 240 Longwood Ave, Harvard Medical School, Boston, MA
| | - Gregory D. Cuny
- Laboratory for Drug Discovery in Neurodegeneration, Brigham & Women's Hospital and Harvard Medical School, 65 Landsdowne St, Cambridge, MA
| | - Randall W. King
- Department of Cell Biology, 240 Longwood Ave, Harvard Medical School, Boston, MA
- Correspondence:
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Mohammadi Roushandeh A, Haji Hosseinlou H, Niknafs B, Halabian R, Mehdipour A, Habibi Roudkenar M. Effects of leukemia inhibitory factor on gp130 expression and rate of metaphase II development during in vitro maturation of mouse oocyte. Iran Biomed J 2010; 14:103-107. [PMID: 21079661 PMCID: PMC3904061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Revised: 07/26/2010] [Accepted: 08/01/2010] [Indexed: 05/30/2023]
Abstract
BACKGROUND Leukemia inhibitory factor (LIF) is a 45-56 kDa glycoprotein that has an important role in proliferation and embryo implantation. Its effect on oocyte maturation and how to exert the function remained to be elucidated. METHODS Immature mice superovulated with human menopausal gonadotropin and germinal vesicle (GV) oocytes were obtained from ovary 48 hours after. GV oocytes were cultured in tissue culture medium 199 with 0, 100, 500 and 1,000 U/ml LIF. Cumulus expansion and in vitro maturation (IVM) rate were assessed after culture. For reverse transcriptase PCR, total RNA from GV and metaphase II (MII) oocytes were extracted by Trizol reagent. The quantity and quality of RNA were determined by spectrophotometry and electrophoresis, respectively. Reverse transcription was performed by Super Script III reverse transcriptase with 1 µg of total RNA followed by DNase I treatment and heat inactivation. Expression of gp130 was determined by RT-PCR. RESULTS Our results showed that cumulus expansion was improved with 1,000 U/ml in culture medium compared to others. GV breakdown and MII rate in groups with LIF were higher than control group and were dose-dependent. In 1,000 U/ml, LIF rate of MII was significantly higher than control group (P less than 0.05). Our results also showed that gp130 is expressed neither in GV nor in MII oocytes during IVM of mouse oocytes. CONCLUSION gp130 is expressed in human oocyte but not in mouse. Our results suggest that in mouse, LIF could affect the oocyte via another receptor or via cumulus cells; however, further studies are warranted.
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Affiliation(s)
| | | | - Behrouz Niknafs
- Dept. of Anatomical Sciences, Medicine Faculty, Medical University of Tabriz, Tabriz;
| | - Raheleh Halabian
- Research Center, Iranian Blood Transfusion Organization (IBTO), Tehran, Iran
| | - Ahmad Mehdipour
- Dept. of Anatomical Sciences, Medicine Faculty, Medical University of Tabriz, Tabriz;
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Snyder JA, Ha Y, Olsofka C, Wahdan R. Both actin and myosin inhibitors affect spindle architecture in PtK1 cells: does an actomyosin system contribute to mitotic spindle forces by regulating attachment and movements of chromosomes in mammalian cells? Protoplasma 2010; 240:57-68. [PMID: 20091066 DOI: 10.1007/s00709-009-0089-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Accepted: 11/09/2009] [Indexed: 05/28/2023]
Abstract
Immunocytochemical techniques are used to analyze the effects of both an actin and myosin inhibitor on spindle architecture in PtK(1) cells to understand why both these inhibitors slow or block chromosome motion and detach chromosomes. Cytochalasin J, an actin inhibitor and a myosin inhibitor, 2, 3 butanedione 2-monoxime, have similar effects on changes in spindle organization. Using primary antibodies and stains, changes are studied in microtubule (MT), actin, myosin, and chromatin localization. Treatment of mitotic cells with both inhibitors results in detachment or misalignment of chromosomes from the spindle and a prominent buckling of MTs within the spindle, particularly evident in kinetochore fibers. Evidence is presented to suggest that an actomyosin system may help to regulate the initial and continued attachment of chromosomes to the mammalian spindle and could also influence spindle checkpoint(s).
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Affiliation(s)
- Judith A Snyder
- Department of Biological Sciences, University of Denver, Denver, CO 80208, USA.
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Wei L, Liang XW, Zhang QH, Li M, Yuan J, Li S, Sun SC, Ouyang YC, Schatten H, Sun QY. BubR1 is a spindle assembly checkpoint protein regulating meiotic cell cycle progression of mouse oocyte. Cell Cycle 2010; 9:1112-21. [PMID: 20237433 DOI: 10.4161/cc.9.6.10957] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BubR1 (Bub1-related kinase or MAD3/Bub1b) is an essential component of the spindle assembly checkpoint (SAC) and plays an important role in kinetochore localization of other spindle checkpoint proteins in mitosis. But its roles in mammalian oocyte meiosis are unclear. In the present study, we examined the expression, localization and function of BubR1 during mouse oocyte meiotic maturation. The expression level of BubR1 increased progressively from germinal vesicle to metaphase II stages. Immunofluorescent analysis showed that BubR1 localized to kinetochores from the germinal vesicle breakdown to the prometaphase I stages, co-localizing with polo-like kinase 1, while it disappeared from the kinetochores at the metaphase I stage. Spindle disruption by nocodazole treatment caused relocation of BubR1 to kinetochores at metaphase I, anaphase I and metaphase II stages; spindle microtubules were disrupted by low temperature treatment in the BubR1-depleted oocytes in meiosis I, suggesting that BubR1 monitors kinetochore-microtubule (K-MT) attachments. Over-expression of exogenous BubR1 arrested oocyte meiosis maturation at the M I stage or earlier; in contrast, dominant-negative BubR1 and BubR1 depletion accelerated meiotic progression. In the BubR1-depleted oocytes, higher percentage of chromosome misalignment was observed and more oocytes overrode the M I stage arrest induced by low concentration of nocodazole. Our data suggest that BubR1 is a spindle assembly checkpoint protein regulating meiotic progression of oocytes.
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Affiliation(s)
- Liang Wei
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Science, Beijing, China
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Jones KT, Holt JE. BubR1 highlights essential function of Cdh1 in mammalian oocytes. Cell Cycle 2010; 9:1029-30. [PMID: 20237424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Affiliation(s)
- Keith T Jones
- School of Biomedical Sciences, University of Newcastle, Callaghan, NSW, Australia.
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Chen TL, Wise SS, Holmes A, Shaffiey F, Wise JP, Thompson WD, Kraus S, Wise JP. Cytotoxicity and genotoxicity of hexavalent chromium in human and North Atlantic right whale (Eubalaena glacialis) lung cells. Comp Biochem Physiol C Toxicol Pharmacol 2009; 150:487-94. [PMID: 19632355 PMCID: PMC4048704 DOI: 10.1016/j.cbpc.2009.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2009] [Revised: 07/15/2009] [Accepted: 07/18/2009] [Indexed: 11/26/2022]
Abstract
Humans and cetaceans are exposed to a wide range of contaminants. In this study, we compared the cytotoxic and genotoxic effects of a metal pollutant, hexavalent chromium [Cr(VI)], which has been shown to cause damage in lung cells from both humans and North Atlantic right whales. Our results show that Cr induces increased cell death and chromosome damage in lung cells from both species with increasing intracellular Cr ion levels. Soluble Cr(VI) induced less of a cytotoxic and genotoxic effect based on administered dose in right whale (Eubalaena glacialis) cells than in human (Homo sapiens) cells. Whereas, particulate Cr(VI) induced a similar cytotoxic effect but less of a genotoxic effect based on administered dose in right whale cells than in human cells. Differences in chromium ion uptake explained soluble chromate-induced cell death but not all of the soluble chromate-induced chromosome damage. Uptake differences of lead ions could explain the differences in particulate chromate-induced toxicity. The data show that both forms of Cr(VI) are less genotoxic to right whale than human lung cells, and that soluble Cr(VI) induces a similar cytotoxic effect in both right whale and human cells, while particulate Cr(VI) is more cytotoxic to right whale lung cells.
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Affiliation(s)
- Tânia Li Chen
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Sandra S. Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Amie Holmes
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Fariba Shaffiey
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - W. Douglas Thompson
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
| | - Scott Kraus
- New England Aquarium, Edgerton Research Laboratory, Central Wharf, Boston, MA 02110, USA
| | - John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Maine Center for Toxicology and Environmental Health, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- Department of Applied Medical Sciences, University of Southern Maine, 96 Falmouth St., Portland, ME. 04104, USA
- New England Aquarium, Edgerton Research Laboratory, Central Wharf, Boston, MA 02110, USA
- Mystic Aquarium, 55 Coogan Blvd., Mystic, CT 06355, USA
- Ocean Alliance, 191 Weston Rd., Lincoln, MA 01773, USA
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Pirtskhelani A, Gakhokidze R, Pirtskhelani N, Gakhokidze E. Study of antimutagenic and anticytotoxic effects of biorag in case of mutations induced by ammonium nitrate. Georgian Med News 2009:112-115. [PMID: 19801748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The antimutagenic and anticytotoxic effects of bioactivator - biorag (created by Prof. R. Gakhokidze) in the case of mutations induced by ammonium nitrate (NH(4)NO(3)) were studied on the laboratory mice. The cytogenetic and toxicological methods of investigation were used in our research. Ammonium nitrate is characterized by mutagenic, cytotoxic and consequently general toxic action. Introduction of ammonium nitrate (doze 1/2, 1/5 LD(50)) per oral to animals induces strong increase (p<0,001) of frequency of chromosomal aberrations (multiple fragmentation, lyses), a genomic mutations (triploidy, tetraploidy), pathological mitosis (K-mitosis, hollow metaphase, adhesion of chromosomes) and destruction of interphase nucleuses (hollow nucleus). Biorag is characterized with greatly expressed antimutagenic and anticytotoxic effect and statistically reliable reduces mutagenic and cytotoxic effect of ammonium nitrate. At separate effect of ammonium nitrate (dose 1/2 LD(50)) the frequency of chromosomal anomalies was 8,8%, pathologic mitosis - 21,4%, interphase nucleus destruction - 4,5%. After addition of biorag in diet, these indexes decreases accordingly to 3,0%; 8,6% and 1,5%. (p<0,001). On the base of conducted experiments application of biorag for medical purpose is prospective, especially for people who are in contact with harmful, mutagenic substances, also for the individuals poisoned with pesticides and fertilizers.
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Ribeiro ADSBB, da Silva CC, Pereira FDC, Lima APD, Vilanova-Costa CAST, Aguiar SS, Pavanin LA, da Cruz AD, Silveira-Lacerda EDP. Mutagenic and genotoxic effects of cis-(dichloro)tetraammineruthenium(III) chloride on human peripheral blood lymphocytes. Biol Trace Elem Res 2009; 130:249-61. [PMID: 19214395 DOI: 10.1007/s12011-009-8334-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Accepted: 01/28/2009] [Indexed: 02/04/2023]
Abstract
Chemotherapeutic agents play an important role in cancer treatment mostly due their systemic action on human organism allowing access to liquid tumors and even metastases. Among these drugs, ruthenium compounds have been showing promising results to treat tumors and represent an important development of new antitumor therapy. This study presents the evaluation of cis-(dichloro)tetraammineruthenium(III) chloride, cis-[RuCl(2)(NH(3))(4)]Cl, genotoxic effects using human peripheral blood lymphocytes cultured in vitro. Mitotic index (MI), chromosome aberrations (CA), and DNA damage using the comet assay were analyzed. MI in human peripheral blood lymphocyte cultures treated with 1, 10, 100, and 1,000 microg mL(-1) cis-[RuCl(2)(NH(3))(4)]Cl were 5.9%, 4.6%, 3.9%, and 0%, respectively. Doxorubicin chloridate was used as the positive control. CA derived from 1, 10, and 100 microg mL(-1) concentrations were defined as spontaneous when compared with the negative control, and at the concentration of 1,000 microg mL(-1), the cell cycle was inhibited (IM = 0%). Results obtained for the comet assay using cis-[RuCl(2)(NH(3))(4)]Cl suggest that this compound has no genotoxic activity against cultured human peripheral blood lymphocytes.
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Wise JP, Wise SS, Goodale BC, Shaffiey F, Kraus S, Walter RB. Medaka (Oryzias latipes) as a sentinel species for aquatic animals: Medaka cells exhibit a similar genotoxic response as North Atlantic right whale cells. Comp Biochem Physiol C Toxicol Pharmacol 2009; 149:210-4. [PMID: 18930840 PMCID: PMC4524507 DOI: 10.1016/j.cbpc.2008.09.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 09/29/2008] [Accepted: 09/29/2008] [Indexed: 11/21/2022]
Abstract
Hexavalent chromium (Cr(VI)) is emerging as a major concern for aquatic environments, particularly marine environments. Medaka (Oryzias latipes) has been used as a model species for human and aquatic health, including the marine environment, though few studies have directly compared toxicological responses in medaka to humans or other aquatic species. We used a medaka fin cell line to compare the genotoxic response of medaka to Cr(VI) to the response observed in North Atlantic right whale cells to see if responses in medaka were similar to those of other aquatic species, particularly aquatic mammals. We used the production of chromosomal aberrations as a measure of genotoxicity. We found that in medaka cells, concentrations of 1, 5 and 10 microM sodium chromate damaged 17, 32 and 43% of metaphases, respectively and these same concentrations 1, 2.5, 5 and 10 microM sodium chromate damaged 14, 24 and 49% of metaphases, respectively, in North Atlantic right whale lung cells and 11, 32 and 41% of metaphases, respectively, in North Atlantic right whale testes cells. These data show that genotoxic responses in medaka are comparable to those seen in North Atlantic right whale cells, consistent with the hypothesis that medaka are a useful model for other aquatic species.
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Affiliation(s)
- John Pierce Wise
- Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., Portland, ME 04104, USA.
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Kuraś M, Pilarski R, Nowakowska J, Zobel A, Brzost K, Antosiewicz J, Gulewicz K. Effect of Alkaloid-Free and Alkaloid-Rich preparations from Uncaria tomentosa bark on mitotic activity and chromosome morphology evaluated by Allium Test. J Ethnopharmacol 2009; 121:140-147. [PMID: 19027059 DOI: 10.1016/j.jep.2008.10.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Revised: 09/30/2008] [Accepted: 10/13/2008] [Indexed: 05/27/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Uncaria tomentosa (Willd.) DC. is the most popular Peruvian plant, used in folk medicine for different purposes. It contains thousands of active compounds with great content of alkaloids. AIM OF STUDY Two different fractions of Alkaloid-Rich and Alkaloid-Free were researched on chromosome morphology, mitotic activity and phases indexes. MATERIALS AND METHODS Cells of Allium Test (meristematic cells of root tips) were incubated up to 24h in different concentrations of Alkaloid-Free and Alkaloid-Rich fraction obtained from Uncaria tomentosa bark followed by 48 h of postincubation in water. The chromosome morphology was analyzed and the content of mitotic and phase indexes were done. Individual compounds, oxindole alkaloids, phenolic compounds and sugars were determined. RESULTS In Alkaloid-Rich and Alkaloid-Free fractions (different in chemical composition) we observed condensation and contraction of chromosomes (more in Alkaloid-Rich) with retardation and/or inhibition of mitoses and changed mitotic phases. Postincubation reversed results in the highest concentration which was lethal (in mostly Alkaloid-Rich fraction). CONCLUSIONS Our studies indicate that different action can depend on different groups of active compounds in a preparation either containing alkaloids or not. Other fraction analysis may be useful in the future.
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Affiliation(s)
- Mieczysław Kuraś
- Department of Ecotoxicology, Warsaw University, Miecznikowa 1, 02-096 Warsaw, Poland.
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Sun F, Handel MA. Regulation of the meiotic prophase I to metaphase I transition in mouse spermatocytes. Chromosoma 2008; 117:471-85. [PMID: 18563426 PMCID: PMC2737826 DOI: 10.1007/s00412-008-0167-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2008] [Revised: 04/21/2008] [Accepted: 05/05/2008] [Indexed: 11/26/2022]
Abstract
The meiotic prophase I to metaphase I transition (G2/MI) involves disassembly of synaptonemal complex (SC), chromatin condensation, and final compaction of morphologically distinct MI bivalent chromosomes. Control of these processes is poorly understood. The G2/MI transition was experimentally induced in mouse pachytene spermatocytes by okadaic acid (OA), and kinetic analysis revealed that disassembly of the central element of the SC occurred very rapidly after OA treatment, before histone H3 phosphorylation on Ser10. These events were followed by relocalization of SYCP3 and final condensation of bivalents. Enzymatic control of these G2/MI transition events was studied using small molecule inhibitors: butyrolactone I (BLI), an inhibitor of cyclin-dependent kinases (CDKs) and ZM447439 (ZM), an inhibitor of aurora kinases (AURKs). The formation of highly condensed MI bivalents and disassembly of the SC are regulated by both CDKs and AURKs. AURKs also mediate phosphorylation of histone H3 in meiosis. However, neither BLI nor ZM inhibited disassembly of the central element of the SC. Thus, despite evidence that the metaphase promoting factor is a universal regulator of the onset of cell division, desynapsis, the first and key step of the G2/MI transition, occurs independently of BLI-sensitive CDKs and ZM-sensitive AURKs.
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Affiliation(s)
- Fengyun Sun
- The Jackson Laboratory, 600 Main Street, Bar Harbor, ME 04609, USA
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