1
|
Kępka K, Wójcik E, Wysokińska A. Assessment of the genomic stability of calves obtained from artificial insemination and OPU/IVP in vitro fertilization. Reprod Domest Anim 2023; 58:1289-1297. [PMID: 37475181 DOI: 10.1111/rda.14433] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/15/2023] [Accepted: 07/11/2023] [Indexed: 07/22/2023]
Abstract
Damage to genetic material and errors in the functioning of cellular mechanisms disturb genome stability and integrity. Assessment of genomic stability in animals is a very important aspect of breeding work. Unfortunately, harmful instabilities affect the functioning, health and reproductive processes of animals. Obtaining healthy calves is a priority, whatever methods of reproductive biotechnology are applied. The aim of the study was to assess the genomic stability of calves obtained from artificial insemination and OPU/IVP in vitro fertilization. The genomic stability of the calves was evaluated using the comet, sister chromatid exchange, and fragile sites assays. Damage to the genetic material of calves obtained by two reproductive biotechnologies was identified. Identification of instability in animals can be a valuable tool in breeding work and accelerate breeding progress.
Collapse
Affiliation(s)
- Katarzyna Kępka
- Institute of Animal Science and Fisheries, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
| | - Ewa Wójcik
- Institute of Animal Science and Fisheries, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
| | - Anna Wysokińska
- Institute of Animal Science and Fisheries, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
| |
Collapse
|
2
|
Effect of Selected Micro- and Macroelements and Vitamins on the Genome Stability of Bovine Embryo Transfer Recipients following In Vitro Fertilization. Animals (Basel) 2023; 13:ani13061056. [PMID: 36978597 PMCID: PMC10044621 DOI: 10.3390/ani13061056] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023] Open
Abstract
Genome instability can lead to a wide variety of diseases. Many endogenous and exogenous factors influence the level of damage to genetic material. Genome integrity depends on factors such as the fidelity of DNA replication, normal DNA organization in the chromosomes, and repair mechanisms. Genome stability influences fertility, embryonic development, and the maintenance of pregnancy. In the case of in vitro fertilization, it can be an important factor determining the success of the procedure. The aim of the study was to assess the stability of the genomes of recipient cows following in vitro fertilization using cytogenetic tests and to analyze the effects of selected vitamins and micro- and macroelements on genome integrity. Genome stability was analyzed using the sister chromatid exchange, fragile site, and comet assays. The material for analysis was peripheral blood from 20 Holstein-Friesian heifers that were embryo transfer recipients. The effect of selected micro- and macroelements and vitamins on the genome stability of the cows was analyzed. Folic acid was shown to significantly influence the level of damage identified using the SCE, FS, and SCGE assays, while iron affected SCE and SCGE results, and zinc affected FS.
Collapse
|
3
|
Exploring the Relationship between Spontaneous Sister Chromatid Exchange and Genome Instability in Two Cryptic Species of Non-Human Primates. Animals (Basel) 2023; 13:ani13030510. [PMID: 36766399 PMCID: PMC9913470 DOI: 10.3390/ani13030510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/23/2023] [Accepted: 01/29/2023] [Indexed: 02/04/2023] Open
Abstract
There are extensive studies on chromosome morphology and karyotype diversity in primates, yet we still lack insight into genomic instability as a key factor underlying the enormous interspecies chromosomal variability and its potential contribution to evolutionary dynamics. In this sense, the assessment of spontaneous sister chromatid exchange (SCE) frequencies represents a powerful tool for evaluating genome stability. Here, we employed G-banding, fluorescence plus Giemsa (FPG), and chromosome orientation fluorescence in situ hybridization (CO-FISH) methodologies to characterize both chromosome-specific frequencies of spontaneously occurring SCE throughout the genome (G-SCE) and telomere-specific SCE (T-SCE). We analyzed primary fibroblast cultures from two male species of Ateles living in captivity: Ateles paniscus (APA) and Ateles chamek (ACH). High frequencies of G-SCEs were observed in both species. Interestingly, G-SCEs clustered on evolutionary relevant chromosome pairs: ACH chromosomes 1, 2, 3, 4, and 7, and APA chromosomes 1, 2, 3, 4/12, 7, and 10. Furthermore, a statistically significant difference between the observed and expected G-SCE frequencies, not correlated with chromosome size, was also detected. CO-FISH analyses revealed the presence of telomere-specific recombination events in both species, which included T-SCE, as well as interstitial telomere signals and telomere duplications, with APA chromosomes displaying higher frequencies, compared to ACH. Our analyses support the hypothesis that regions of Ateles chromosomes susceptible to recombination events are fragile sites and evolutionary hot spots. Thus, we propose SCE analyses as a valuable indicator of genome instability in non-human primates.
Collapse
|
4
|
Kuchi Bhotla H, Balasubramanian B, Rengasamy KRR, Arumugam VA, Alagamuthu KK, Chithravel V, Chaudhary A, Alanazi AM, Pappuswamy M, Meyyazhagan A. Genotoxic repercussion of high-intensity radiation (x-rays) on hospital radiographers. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2023; 64:123-131. [PMID: 36541415 DOI: 10.1002/em.22523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 11/29/2022] [Accepted: 12/12/2022] [Indexed: 05/24/2023]
Abstract
Recent technological advances in the medical field have increased the plausibility of exposing humans to high-intensity wavelength radiations like x-rays and gamma rays while diagnosing or treating specific medical maladies. These radiations induce nucleotide changes and chromosomal alterations in the exposed population, intentionally or accidentally. A radiological investigation is regularly used in identifying the disease, especially by the technicians working in intensive care units. The current study observes the genetic damages like chromosomal abnormalities (CA) in clinicians who are occupationally exposed to high-intensity radiations (x-rays) at their workplaces using universal cytogenetic tools like micronucleus assay (MN), sister chromatid exchange and comet assay. The study was conducted between 100 exposed practitioners from the abdominal scanning, chest scanning, cranial and orthopedic or bone scanning department and age-matched healthy controls. We observed a slightly higher rate of MN and CA (p < .05) in orthopedic and chest department practitioners than in other departments concerning increasing age and duration of exposure at work. Our results emphasize taking extra precautionary measures in clinical and hospital radiation laboratories to protect the practitioners.
Collapse
Affiliation(s)
| | | | - Kannan R R Rengasamy
- Centre of Excellence for Pharmaceutical Sciences, North-West University, Potchefstroom, South Africa
- Laboratory of Natural Products and Medicinal Chemistry (LNPMC), Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, India
| | - Vijaya Anand Arumugam
- Medical Genetics and Epigenetics Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, Tamil Nadu, India
| | - Karthick Kumar Alagamuthu
- Department of Biotechnology, Selvamm Arts and Science College (Autonomous), Namakkal, Tamil Nadu, India
| | | | - Aditi Chaudhary
- Department of Life Sciences, CHRIST (Deemed to be University), Bangalore, India
| | - Amer M Alanazi
- Pharmaceutical Chemistry Department, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | | | - Arun Meyyazhagan
- Department of Life Sciences, CHRIST (Deemed to be University), Bangalore, India
| |
Collapse
|
5
|
Classification of Giemsa staining chromosome using input-aware deep convolutional neural network with integrated uncertainty estimates. Biomed Signal Process Control 2022. [DOI: 10.1016/j.bspc.2021.103120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
6
|
Correll-Tash S, Lilley B, Salmons Iv H, Mlynarski E, Franconi CP, McNamara M, Woodbury C, Easley CA, Emanuel BS. Double strand breaks (DSBs) as indicators of genomic instability in PATRR-mediated translocations. Hum Mol Genet 2020; 29:3872-3881. [PMID: 33258468 DOI: 10.1093/hmg/ddaa251] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 10/05/2020] [Accepted: 11/25/2020] [Indexed: 02/06/2023] Open
Abstract
Genomic instability contributes to a variety of potentially damaging conditions, including DNA-based rearrangements. Breakage in the form of double strand breaks (DSBs) increases the likelihood of DNA damage, mutations and translocations. Certain human DNA regions are known to be involved in recurrent translocations, such as the palindrome-mediated rearrangements that have been identified at the breakpoints of several recurrent constitutional translocations: t(11;22)(q23;q11), t(17;22)(q11;q11) and t(8;22) (q24;q11). These breakpoints occur at the center of palindromic AT-rich repeats (PATRRs), which suggests that the structure of the DNA may play a contributory role, potentially through the formation of secondary cruciform structures. The current study analyzed the DSB propensity of these PATRR regions in both lymphoblastoid (mitotic) and spermatogenic cells (meiotic). Initial results found an increased association of sister chromatid exchanges (SCEs) at PATRR regions in experiments that used SCEs to assay DSBs, combining SCE staining with fluorescence in situ hybridization (FISH). Additional experiments used chromatin immunoprecipitation (ChIP) with antibodies for either markers of DSBs or proteins involved in DSB repair along with quantitative polymerase chain reaction to quantify the frequency of DSBs occurring at PATRR regions. The results indicate an increased rate of DSBs at PATRR regions. Additional ChIP experiments with the cruciform binding 2D3 antibody indicate an increased rate of cruciform structures at PATRR regions in both mitotic and meiotic samples. Overall, these experiments demonstrate an elevated rate of DSBs at PATRR regions, an indication that the structure of PATRR containing DNA may lead to increased breakage in multiple cellular environments.
Collapse
Affiliation(s)
- Sarah Correll-Tash
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Brenna Lilley
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Harold Salmons Iv
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Elisabeth Mlynarski
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Colleen P Franconi
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Meghan McNamara
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Carson Woodbury
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Charles A Easley
- Department of Environmental Health Sciences, College of Public Health at the University of Georgia, Athens, GA, 30602, USA
| | - Beverly S Emanuel
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA.,Department of Pediatrics, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, PA 19104, USA
| |
Collapse
|
7
|
Abstract
Chromosome instability adversely affects animal fertility and reproduction. Analysis of instability can be a valuable diagnostic tool. Helpful tests for assessment of instabilities include the sister chromatid exchange assay, identification of fragile sites, the bleomycin assay and the comet assay. These techniques can be used to assess and compare the chromosome stability of individual breeds of animals. The aim of the study was to assess chromosome stability in boars: Duroc, Duroc x Pietrain and Pietrain x Duroc crossbreds, Polish Large White, and the Neckar, P76 and PIC lines. The study assessed the chromosome stability of boars. The distribution of instabilities in individual breeds was varied. The average frequency of chromatid exchange was 4.8 ± 1.5, while that of fragile sites was 3.9 ± 1.4. The mean level of DNA damage (% tail DNA) was 9.4 ± 8.3, while in the bleomycin assay b/c and %AM were 0.6 ± 0.7 and 44.4 ± 4.1. A higher rate of instability was found in older individuals than in younger ones. The cytogenetic assays used to identify various forms of chromosome instability can be used to evaluate boars intended for breeding.
Collapse
Affiliation(s)
- Ewa Wójcik
- Institute of Animal Science and Fisheries, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
- * E-mail:
| | - Agnieszka Sokół
- Institute of Animal Science and Fisheries, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
| |
Collapse
|
8
|
Feng W, Simpson DA, Carvajal-Garcia J, Price BA, Kumar RJ, Mose LE, Wood RD, Rashid N, Purvis JE, Parker JS, Ramsden DA, Gupta GP. Genetic determinants of cellular addiction to DNA polymerase theta. Nat Commun 2019; 10:4286. [PMID: 31537809 PMCID: PMC6753077 DOI: 10.1038/s41467-019-12234-1] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 08/22/2019] [Indexed: 02/07/2023] Open
Abstract
Polymerase theta (Pol θ, gene name Polq) is a widely conserved DNA polymerase that mediates a microhomology-mediated, error-prone, double strand break (DSB) repair pathway, referred to as Theta Mediated End Joining (TMEJ). Cells with homologous recombination deficiency are reliant on TMEJ for DSB repair. It is unknown whether deficiencies in other components of the DNA damage response (DDR) also result in Pol θ addiction. Here we use a CRISPR genetic screen to uncover 140 Polq synthetic lethal (PolqSL) genes, the majority of which were previously unknown. Functional analyses indicate that Pol θ/TMEJ addiction is associated with increased levels of replication-associated DSBs, regardless of the initial source of damage. We further demonstrate that approximately 30% of TCGA breast cancers have genetic alterations in PolqSL genes and exhibit genomic scars of Pol θ/TMEJ hyperactivity, thereby substantially expanding the subset of human cancers for which Pol θ inhibition represents a promising therapeutic strategy.
Collapse
Affiliation(s)
- Wanjuan Feng
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Dennis A Simpson
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Juan Carvajal-Garcia
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Brandon A Price
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Rashmi J Kumar
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Lisle E Mose
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Richard D Wood
- Department of Epigenetics and Molecular Carcinogenesis, University of Texas MD Anderson Cancer Center, Smithville, TX, 78957, USA
| | - Naim Rashid
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Jeremy E Purvis
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Joel S Parker
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Dale A Ramsden
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Gaorav P Gupta
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
| |
Collapse
|
9
|
Wójcik E, Szostek M. Assessment of genome stability in various breeds of cattle. PLoS One 2019; 14:e0217799. [PMID: 31163060 PMCID: PMC6548367 DOI: 10.1371/journal.pone.0217799] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 05/18/2019] [Indexed: 02/06/2023] Open
Abstract
Chromosomal instability is a type of genome instability involving changes in genetic information at the chromosomal level. The basic tests used to identify this form of instability are sister chromatid exchange (SCE) tests and identification of fragile sites (FS). SCE is the process by which sister chromatids become fragmented as a result of DNA strand breakage and reassembly, followed by exchange of these fragments. FS can be observed in the form of breaks, gaps or constrictions on chromosomes, which often result from multiple nucleotide repeats in DNA that are difficult to replicate. The research material was the peripheral blood of ten breeds of cattle raised in Poland, including four native breeds covered by a genetic resources conservation programme, i.e. Polish Red, Polish Red-and-White, White-Backed, and Polish Black-and-White, as well as Polish Holstein-Friesian, Simmental, Montbéliarde, Jersey, Limousine and Danish Red. Two tests were performed on chromosomes obtained from in vitro cultures: SCE and FS. The average frequency of SCE was 5.08 ± 1.31, while the incidence of FS was 3.45 ± 0.94. Differences in the incidence of SCE and FS were observed between breeds. The least damage was observed in the Polish Red and White-Backed breeds, and the most in Polish Holstein-Friesians. The most damage was observed in the interstitial part of the chromosomes. Age was shown to significantly affect the incidence of SCE and FS. Younger cows showed less damage than older ones (SCE: 4.84 ± 1.25; 5.34 ± 1.24; FS: 3.10 ± 0.88, 3.80 ± 0.92).
Collapse
Affiliation(s)
- Ewa Wójcik
- Institute of Bioengineering and Animal Breeding, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
| | - Małgorzata Szostek
- Institute of Bioengineering and Animal Breeding, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
| |
Collapse
|
10
|
Madrigal-Bujaidar E, Paniagua-Pérez R, Reyes-Cadena S, Martínez-Canseco C, Reyes-Legorreta C, Martínez-Castro J, Madrigal-Santillán E, Morales-González J, Cristóbal-Luna J, Álvarez-González I. Cellular protection induced by genistein in mouse and its antioxidant capacity. Pharmacogn Mag 2019. [DOI: 10.4103/pm.pm_78_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
11
|
Czerwińska J, Nowak M, Wojtczak P, Dziuban-Lech D, Cieśla JM, Kołata D, Gajewska B, Barańczyk-Kuźma A, Robinson AR, Shane HL, Gregg SQ, Rigatti LH, Yousefzadeh MJ, Gurkar AU, McGowan SJ, Kosicki K, Bednarek M, Zarakowska E, Gackowski D, Oliński R, Speina E, Niedernhofer LJ, Tudek B. ERCC1-deficient cells and mice are hypersensitive to lipid peroxidation. Free Radic Biol Med 2018; 124:79-96. [PMID: 29860127 PMCID: PMC6098728 DOI: 10.1016/j.freeradbiomed.2018.05.088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/28/2018] [Accepted: 05/29/2018] [Indexed: 01/01/2023]
Abstract
Lipid peroxidation (LPO) products are relatively stable and abundant metabolites, which accumulate in tissues of mammals with aging, being able to modify all cellular nucleophiles, creating protein and DNA adducts including crosslinks. Here, we used cells and mice deficient in the ERCC1-XPF endonuclease required for nucleotide excision repair and the repair of DNA interstrand crosslinks to ask if specifically LPO-induced DNA damage contributes to loss of cell and tissue homeostasis. Ercc1-/- mouse embryonic fibroblasts were more sensitive than wild-type (WT) cells to the LPO products: 4-hydroxy-2-nonenal (HNE), crotonaldehyde and malondialdehyde. ERCC1-XPF hypomorphic mice were hypersensitive to CCl4 and a diet rich in polyunsaturated fatty acids, two potent inducers of endogenous LPO. To gain insight into the mechanism of how LPO influences DNA repair-deficient cells, we measured the impact of the major endogenous LPO product, HNE, on WT and Ercc1-/- cells. HNE inhibited proliferation, stimulated ROS and LPO formation, induced DNA base damage, strand breaks, error-prone translesion DNA synthesis and cellular senescence much more potently in Ercc1-/- cells than in DNA repair-competent control cells. HNE also deregulated base excision repair and energy production pathways. Our observations that ERCC1-deficient cells and mice are hypersensitive to LPO implicates LPO-induced DNA damage in contributing to cellular demise and tissue degeneration, notably even when the source of LPO is dietary polyunsaturated fats.
Collapse
Affiliation(s)
- Jolanta Czerwińska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
| | - Małgorzata Nowak
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland.
| | - Patrycja Wojtczak
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland.
| | - Dorota Dziuban-Lech
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
| | - Jarosław M Cieśla
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
| | - Daria Kołata
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland.
| | - Beata Gajewska
- Department of Biochemistry, Medical University of Warsaw, Warsaw, Poland.
| | | | - Andria R Robinson
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA.
| | - Hillary L Shane
- University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA.
| | - Siobhán Q Gregg
- University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA; Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
| | - Lora H Rigatti
- University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA.
| | - Matthew J Yousefzadeh
- Department of Molecular Medicine, Center on Aging, The Scripps Research Institute, Jupiter, FL, USA.
| | - Aditi U Gurkar
- Department of Molecular Medicine, Center on Aging, The Scripps Research Institute, Jupiter, FL, USA.
| | - Sara J McGowan
- Department of Molecular Medicine, Center on Aging, The Scripps Research Institute, Jupiter, FL, USA.
| | - Konrad Kosicki
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland.
| | - Małgorzata Bednarek
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland.
| | - Ewelina Zarakowska
- Department of Clinical Biochemistry, Faculty of Pharmacy, Collegium Medicum, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland.
| | - Daniel Gackowski
- Department of Clinical Biochemistry, Faculty of Pharmacy, Collegium Medicum, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland.
| | - Ryszard Oliński
- Department of Clinical Biochemistry, Faculty of Pharmacy, Collegium Medicum, Nicolaus Copernicus University in Toruń, Bydgoszcz, Poland.
| | - Elżbieta Speina
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
| | - Laura J Niedernhofer
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA; Department of Molecular Medicine, Center on Aging, The Scripps Research Institute, Jupiter, FL, USA.
| | - Barbara Tudek
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland; Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland.
| |
Collapse
|
12
|
PARI Regulates Stalled Replication Fork Processing To Maintain Genome Stability upon Replication Stress in Mice. Mol Cell Biol 2017; 37:MCB.00117-17. [PMID: 28894029 DOI: 10.1128/mcb.00117-17] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 09/07/2017] [Indexed: 12/14/2022] Open
Abstract
DNA replication is frequently perturbed by intrinsic, as well as extrinsic, genotoxic stress. At damaged forks, DNA replication and repair activities require proper coordination to maintain genome integrity. We show here that PARI antirecombinase plays an essential role in modulating the initial response to replication stress in mice. PARI is functionally dormant at replisomes during normal replication, but upon replication stress, it enhances nascent-strand shortening that is regulated by RAD51 and MRE11. PARI then promotes double-strand break induction, followed by new origin firing instead of replication restart. Such PARI function is apparently obstructive to replication but is nonetheless physiologically required for chromosome stability in vivo and ex vivo Of note, Pari-deficient embryonic stem cells exhibit spontaneous chromosome instability, which is attenuated by differentiation induction, suggesting that pluripotent stem cells have a preferential requirement for PARI that acts against endogenous replication stress. PARI is a latent modulator of stalled fork processing, which is required for stable genome inheritance under both endogenous and exogenous replication stress in mice.
Collapse
|
13
|
Turturro A, Singh NP, Bazare J, Hart RW. Levels of 5-Bromo-2′-deoxyuridine and Its Metabolites During Continuous Infusion Paradigms in a Transplacental System. ACTA ACUST UNITED AC 2016. [DOI: 10.3109/10915818409009074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The levels of 5-bromo-2'-deoxyuridine (BrdUrd) (a teratogen and mutagen) and its metabolites were measured using the hplc in maternal and fetal blood at 20–21 days of gestation in Sprague-Dawley derived CD rats during continuous infusion paradigms which are used in visualization of sister chromatid exchanges. The time course of the maternal values following a dose of 1 g/kg body weight was determined by sampling with an aortic catheter. Fetal levels were taken after a 2-hour intraperitoneal infusion of BrdUrd into the mother. It was found that the maternal level of BrdUrd plateaued at 0.4 mg%, while the level of metabolites gradually increased with time for both techniques. Also, although the overall amount of radioactivity indicated that approximately 40% of the total maternal dose reached the fetus, the fetal concentration of BrdUrd was less than one-seventh the maternal one.
Collapse
|
14
|
van Wietmarschen N, Lansdorp PM. Bromodeoxyuridine does not contribute to sister chromatid exchange events in normal or Bloom syndrome cells. Nucleic Acids Res 2016; 44:6787-93. [PMID: 27185886 PMCID: PMC5001594 DOI: 10.1093/nar/gkw422] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 05/05/2016] [Indexed: 12/12/2022] Open
Abstract
Sister chromatid exchanges (SCEs) are considered sensitive indicators of genome instability. Detection of SCEs typically requires cells to incorporate bromodeoxyuridine (BrdU) during two rounds of DNA synthesis. Previous studies have suggested that SCEs are induced by DNA replication over BrdU-substituted DNA and that BrdU incorporation alone could be responsible for the high number of SCE events observed in cells from patients with Bloom syndrome (BS), a rare genetic disorder characterized by marked genome instability and high SCE frequency. Here we show using Strand-seq, a single cell DNA template strand sequencing technique, that the presence of variable BrdU concentrations in the cell culture medium and in DNA template strands has no effect on SCE frequency in either normal or BS cells. We conclude that BrdU does not induce SCEs and that SCEs detected in either normal or BS cells reflect DNA repair events that occur spontaneously.
Collapse
Affiliation(s)
- Niek van Wietmarschen
- European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, 9713 AV Groningen, The Netherlands
| | - Peter M Lansdorp
- European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, 9713 AV Groningen, The Netherlands Terry Fox Laboratory, BC Cancer Agency, Vancouver, BC V5Z 1L3, Canada Division of Hematology, Department of Medicine, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| |
Collapse
|
15
|
Atteritano M, Mazzaferro S, Mantuano S, Bagnato GL, Bagnato GF. Effects of infliximab on sister chromatid exchanges and chromosomal aberration in patients with rheumatoid arthritis. Cytotechnology 2016; 68:313-8. [PMID: 26012953 PMCID: PMC4754247 DOI: 10.1007/s10616-014-9782-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 08/25/2014] [Indexed: 12/19/2022] Open
Abstract
The aim of this study was to evaluate in a 24-weeks the effect of anti-TNF-alpha, infliximab, on cytogenetic biomarkers in peripheral lymphocytes of patients with rheumatoid arthritis (RA). A total of 40 patients with RA met the criteria to be treated with methotrexate (15 mg/week) were evaluated. Twenty patients, randomly selected, were treated with infliximab in addition to methotrexate (group I), whereas the other 20 patients continued with only methotrexate treatment (group M). Twenty healthy volunteers matched for age, gender and smoking habits served as control group (group C). At baseline, sister chromatid exchange rate was 7.20 ± 2.21 in group I, 7.40 ± 1.60 in group M and 4.97 ± 1.32 in group C (P < 0.01 vs group I and M). After 24-weeks, sister chromatid exchange rate was 7.87 ± 2.54 in group I and 7.81 ± 1.95 in group M (P = ns). High frequency cells count was 4.9 % and 4.7 % in the groups I and M, respectively, at the end of the study (P = ns). The basal chromosomal aberration frequency was 4.90 % in group I and 5.20 % in groups M; after 24-weeks, this was 5.10 % in group I and 5.10 % in groups M (P = ns). Infliximab treatment, for 24 weeks, did not increase the cytogenetic biomarkers in patients with RA. Our data show that the use of infliximab has not a genotoxic effect in patients with RA.
Collapse
Affiliation(s)
- M Atteritano
- Department of Clinical and Experimental Medicine, University of Messina, Pad. C, 3rd floor, A.O.U. Policlinico "G. Martino" Via C. Valeria, 98125, Messina, Italy.
| | - S Mazzaferro
- Department of Clinical and Experimental Medicine, University of Messina, Pad. C, 3rd floor, A.O.U. Policlinico "G. Martino" Via C. Valeria, 98125, Messina, Italy
| | - S Mantuano
- Department of Clinical and Experimental Medicine, University of Messina, Pad. C, 3rd floor, A.O.U. Policlinico "G. Martino" Via C. Valeria, 98125, Messina, Italy
| | - G L Bagnato
- Department of Clinical and Experimental Medicine, University of Messina, Pad. C, 3rd floor, A.O.U. Policlinico "G. Martino" Via C. Valeria, 98125, Messina, Italy
| | - G F Bagnato
- Department of Clinical and Experimental Medicine, University of Messina, Pad. C, 3rd floor, A.O.U. Policlinico "G. Martino" Via C. Valeria, 98125, Messina, Italy
| |
Collapse
|
16
|
van Acker F, Messinger H, Bär A. Evaluation of vinyl laurate in a battery of in vitro and in vivo tests for genotoxicity. Regul Toxicol Pharmacol 2014; 72:77-84. [PMID: 25445001 DOI: 10.1016/j.yrtph.2014.09.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 09/15/2014] [Accepted: 09/16/2014] [Indexed: 12/22/2022]
Abstract
Vinyl laurate is a potential residual monomer in chewing gum base formulated with polyvinyl acetate vinyl laurate copolymer (PVAcVL). The genotoxic potential of vinyl laurate was examined in a battery of in vitro and in vivo genotoxicity tests. Vinyl laurate was not mutagenic in Ames tests. In addition, it was not mutagenic in the HPRT mutation assay in L5178Y cells. An in vitro mammalian chromosome aberration assay performed in CHO cells was equivocal. Vinyl laurate and/or its metabolites were not clastogenic in the mouse bone marrow micronucleus test. Kinetic data indicate that VL is metabolised to acetaldehyde and lauric acid. Both metabolites are well known and have been studied previously. Model calculations show, that any exposure to acetaldehyde from the consumption of PVAcVL containing chewing gum will remain far below levels of acetaldehyde exposure from food in which acetaldehyde occurs naturally. Direct exposure to VL will primarily be at the site of entry. The lack of toxicity in a 90-day repeated dose toxicity test, performed with VL doses up to approximately 3000 times higher than the maximal VL intake from the consumption of a typical piece of chewing gum, demonstrates a high safety margin.
Collapse
Affiliation(s)
| | | | - Albert Bär
- Bioresco Ltd., Bundesstrasse 29, 4054 Basel, Switzerland.
| |
Collapse
|
17
|
Health assessment of gasoline and fuel oxygenate vapors: micronucleus and sister chromatid exchange evaluations. Regul Toxicol Pharmacol 2014; 70:S29-34. [PMID: 24852491 DOI: 10.1016/j.yrtph.2014.05.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/07/2014] [Accepted: 05/08/2014] [Indexed: 11/23/2022]
Abstract
Micronucleus and sister chromatid exchange (SCE) tests were performed for vapor condensate of baseline gasoline (BGVC), or gasoline with oxygenates, methyl tert-butyl ether (G/MTBE), ethyl tert butyl ether (G/ETBE), t-amyl methyl ether (G/TAME), diisopropyl ether (G/DIPE), t-butyl alcohol (TBA), or ethanol (G/EtOH). Sprague Dawley rats (the same 5/sex/group for both endpoints) were exposed to 0, 2000, 10,000, or 20,000mg/m(3) of each condensate, 6h/day, 5days/week over 4weeks. Positive controls (5/sex/test) were given cyclophosphamide IP, 24h prior to sacrifice at 5mg/kg (SCE test) and 40mg/kg (micronucleus test). Blood was collected from the abdominal aorta for the SCE test and femurs removed for the micronucleus test. Blood cell cultures were treated with 5μg/ml bromodeoxyuridine (BrdU) for SCE evaluation. No significant increases in micronucleated immature erythrocytes were observed for any test material. Statistically significant increases in SCE were observed in rats given BGVC alone or in female rats given G/MTBE. G/TAME induced increased SCE in both sexes at the highest dose only. Although DNA perturbation was observed for several samples, DNA damage was not expressed as increased micronuclei in bone marrow cells. Inclusion of oxygenates in gasoline did not increase the effects of gasoline alone or produce a cytogenetic hazard.
Collapse
|
18
|
Mezzanotte R, Nieddu M. A historical overview of bromo-substituted DNA and sister chromatid differentiation. Methods Mol Biol 2014; 1094:89-98. [PMID: 24162982 DOI: 10.1007/978-1-62703-706-8_8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
The thymidine analogue 5-bromo-2'-deoxyuridine (BrdU) has been widely used to make sister chromatid differentiation (SCD) evident in metaphase chromosomes of cells grown for two cycles in BrdU and, thus, containing varying amounts of the thymidine analogue. A direct consequence was the possibility of making sister chromatid exchange (SCE) evident without using autoradiographic procedures. The latter phenomenon was first discovered in 1953, and its frequency is considered a reliable marker of pathological cell situations, as well as an indicator of mutagenic compounds. Several experimental procedures were found which produced SCD, such as the use of fluorochromes like 33258 Hoechst or acridine orange, whose observation under fluorescence microscopy was directly recorded by photos or stained with Giemsa to make chromosome preparations permanent. Other treatments followed by Giemsa staining required the use of saline hot solutions, acid solutions, nuclease attack and specific monoclonal antibodies. Basically two molecular mechanisms were invoked to explain the different affinity of Giemsa stain for differential BrdU-substituted chromatid DNA. The first implied debromination of chromatid DNA, whose occurrence would be greater in chromatids containing an amount of BrdU greater than that present in sister chromatids. The second mechanism, although not denying the importance of DNA debromination, postulated that chromatin structural organization, in terms of DNA-protein and/or protein-protein DNA interaction, is responsible for SCD production.
Collapse
Affiliation(s)
- Roberto Mezzanotte
- Dipartimento di Scienze Biomediche, University of Cagliari, Cagliari, Italy
| | | |
Collapse
|
19
|
Larramendy ML, Kovanen PE, Knuutila S. MAC (Morphology, Antibody, Chromosomes) Method for Study of Cell Proliferation in Unfractionated Human Hematopoietic Cell Cultures. J Histotechnol 2013. [DOI: 10.1179/his.1992.15.1.31] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
|
20
|
Tug E, Kayhan G, Kan D, Guntekin S, Ergun MA. The evaluation of long-term effects of ionizing radiation through measurement of current sister chromatid exchange (SCE) rates in radiology technologists, compared with previous SCE values. Mutat Res 2013; 757:28-30. [PMID: 23867852 DOI: 10.1016/j.mrgentox.2013.04.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 02/12/2013] [Accepted: 04/05/2013] [Indexed: 11/29/2022]
Abstract
Ionizing radiation is a strong physical mutagen, causing breakage of phosphodiester bonds in DNA at any stage of the mitotic cycle. Analysis of sister chromatid exchange (SCE) has come into use as a sensitive DNA-damage indicator. We investigated the SCE rates in radiology technologists who are occupationally and chronically exposed to ionizing radiation. The study included 39 radiology technologists and 35 sex- and age-matched healthy controls. There was a statistically significant difference in the SCE frequency between radiology technologists and controls (p<0.0001). Additionally, previous SCE data of 10 radiology technologists were compared with current results regarding radiation exposure time. There was statistically significant difference between previous and current SCE values (p=0.005). The significant increase in the frequency of SCE in radiology technologists emphasizes the importance of radiation-protection procedures in order to minimize radiation exposure and avoid possible genotoxic effects. Comparison of two studies that measured SCE values of radiology technologists after 8 years also suggests that the genotoxic effect is reversible. In conclusion, radiation is still an important mutagenic agent despite improvements in daily working hours and conditions.
Collapse
Affiliation(s)
- E Tug
- Gazi University, Faculty of Medicine, Department of Medical Genetics, Ankara, Turkey.
| | | | | | | | | |
Collapse
|
21
|
Jeyapradha D, Saraswathi T, Ranganathan K, Wilson K. Comparison of the frequency of sister chromatid exchange in pan chewers and oral submucous fibrosis patients. J Oral Maxillofac Pathol 2012; 15:278-82. [PMID: 22144829 PMCID: PMC3227253 DOI: 10.4103/0973-029x.86680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sister chromatid exchange (SCE) test is a sensitive, biomarker of genotoxic substances. The frequency of SCE in lymphocytes of ten pan chewing patients, oral submucous fibrosis (OSF) patients and age matched healthy controls were investigated. The frequency of mean SCE/cell was found to be 10.428 ± 0.755 in OSF patients, 8.752 ± 0.383 in case of pan chewers as compared to 5.912 ± 0.310 in controls. These values show a significant increase in frequency of SCE/cell in OSF patients and pan chewers when compared with that of healthy controls. There is a positive correlation co-efficient of SCE/cell with frequency, quantity, duration, intensity and period of exposure of pan-parag to oral mucosa in pan chewers and OSF patients indicating genotoxic effect of pan. Thus SCE could be used as a biomarker in chewers also to assess the level of genomic damage and to advocate efficient control measures.
Collapse
Affiliation(s)
- D Jeyapradha
- Department of Oral Pathology and Microbiology, Thai Moogambigai Dental College and Hospital, Chennai, India
| | | | | | | |
Collapse
|
22
|
Neuwirth C, Mosesso P, Pepe G, Fiore M, Malfatti M, Turteltaub K, Dekant W, Mally A. Furan carcinogenicity: DNA binding and genotoxicity of furan in rats in vivo. Mol Nutr Food Res 2012; 56:1363-74. [PMID: 22865590 DOI: 10.1002/mnfr.201200226] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 05/21/2012] [Accepted: 06/05/2012] [Indexed: 11/09/2022]
Abstract
SCOPE Furan is a potent hepatotoxicant and liver carcinogen in rodents. However, short-term tests for genotoxicity of furan are inconclusive. The aim of this study was to assess the potential of furan to covalently bind to DNA, and to assess furan genotoxicity in rats in vivo. MATERIALS AND METHODS Accelerator mass spectrometry was used to determine the (14) C-content in DNA following administration of [3,4-(14) C]-furan (0.1 and 2.0 mg/kg bw) to F344 rats. DNA damage, micronuclei, chromosomal aberrations, and sister chromatid exchanges were analyzed in F344 rats treated with furan for up to 28 days. CONCLUSION The (14) C-content in liver DNA was significantly increased in a dose-dependent manner, with mean concentrations of 7.9 ± 3.5 amol (14) C/μg DNA and 153.3 ± 100.2 amol (14) C/μg DNA, corresponding to 16.5 ± 7.4 and 325.2 ± 212.7 adducts/10(9) nucleotides at 0.1 and 2.0 mg/kg bw, respectively. There was no evidence for genotoxicity of furan in peripheral blood and bone marrow cells. However, a dose-related increase in the incidence of chromosomal aberrations in rat splenocytes and some indication of DNA damage in liver were observed. Collectively, results from this study indicate that furan may operate-at least in part-by a genotoxic mode of action.
Collapse
Affiliation(s)
- Carolin Neuwirth
- Department of Toxicology, University of Würzburg, Würzburg, Germany
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Pradillo M, Santos JL. The template choice decision in meiosis: is the sister important? Chromosoma 2011; 120:447-54. [PMID: 21826413 DOI: 10.1007/s00412-011-0336-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 07/23/2011] [Accepted: 07/25/2011] [Indexed: 11/30/2022]
Abstract
Recombination between homologous chromosomes is crucial to ensure their proper segregation during meiosis. This is achieved by regulating the choice of recombination template. In mitotic cells, double-strand break repair with the sister chromatid appears to be preferred, whereas interhomolog recombination is favoured during meiosis. However, in the last year, several studies in yeast have shown the importance of the meiotic recombination between sister chromatids. Although this thinking seems to be new, evidences for sister chromatid exchange during meiosis were obtained more than 50 years ago in non-model organisms. In this mini-review, we comment briefly on the most recent advances in this hot topic and also describe observations which suggest the existence of inter-sister repair during meiotic recombination. For instance, the behaviour of mammalian XY bivalents and that of trivalents in heterozygotes for chromosomal rearrangements are cited as examples. The "rediscovering" of the requirement for the sister template, although it seems to occur at a low frequency, will probably prompt further investigations in organisms other than yeast to understand the complexity of the partner choice during meiosis.
Collapse
Affiliation(s)
- Mónica Pradillo
- Departamento de Genética, Universidad Complutense de Madrid, Spain.
| | | |
Collapse
|
24
|
Digkas E, Kareli D, Chrisafi S, Passadaki T, Mantadakis E, Hatzimichail A, Vargemezis V, Lialiaris T. Attenuation of cytogenetic effects by erythropoietin in human lymphocytes in vitro and P388 ascites tumor cells in vivo treated with irinotecan (CPT-11). Food Chem Toxicol 2010; 48:242-9. [DOI: 10.1016/j.fct.2009.10.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/23/2009] [Accepted: 10/01/2009] [Indexed: 11/30/2022]
|
25
|
Barjaktarović N, Savage JR. R.b.e. for d(42MeV)-Be Neutrons Based on Chromosome-type Aberrations Induced in Human Lymphocytes and Scored in Cells at First Division. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/09553008014550811] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
26
|
Sahin A, Tatar A, Oztas S, Seven B, Varoglu E, Yesilyurt A, Ayan AK. Evaluation of the genotoxic effects of chronic low-dose ionizing radiation exposure on nuclear medicine workers. Nucl Med Biol 2009; 36:575-8. [PMID: 19520299 DOI: 10.1016/j.nucmedbio.2009.02.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 02/13/2009] [Accepted: 02/18/2009] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Nuclear medicine workers are occupationally exposed to chronic ionizing radiation. It is known that ionizing radiation may have damaging effects on chromosomes. In the present study, we investigated the genotoxic effects of ionizing radiation on nuclear medicine workers. We used two different indicators of genotoxicity methods: sister chromatid exchange (SCE) and micronucleus (MN). METHODS The present research was carried out using 21 nuclear medicine workers (11 females and 10 males) during two periods: during normal working conditions and after a 1-month vacation. The radiation dose varied from 1.20 to 48.56 mSv, which accumulated during the occupational exposure time between two vacations. Peripheral blood samples were taken from each subject for two distinct lymphocyte cultures (SCE and MN) in each period. RESULTS In nearly all subjects, SCE values increased significantly during radiation exposure compared to the postvacation period (P<.05). Similarly, MN frequencies in most of the subjects increased significantly during radiation exposure compared to the postvacation period (P<.05). CONCLUSIONS This study revealed that both SCE and MN frequencies in most of the subjects were significantly higher during exposure to ionizing radiation than after a 1-month vacation period. However, this genotoxic effect was reversible in most of the subjects.
Collapse
Affiliation(s)
- Ali Sahin
- Department of Nuclear Medicine, Ataturk University, Erzurum, Turkey.
| | | | | | | | | | | | | |
Collapse
|
27
|
Lambert B, Hansson K, Lindsten J, Sten M, Werelius B. Bromodeoxyuridine-induced sister chromatid exchanges in human lymphocytes. Hereditas 2009; 83:163-74. [PMID: 61954 DOI: 10.1111/j.1601-5223.1976.tb01582.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
|
28
|
Paniagua-Pérez R, Madrigal-Bujaidar E, Molina-Jasso D, Reyes-Cadena S, Alvarez-González I, Sánchez-Chapul L, Pérez-Gallaga J. Antigenotoxic, antioxidant and lymphocyte induction effects produced by pteropodine. Basic Clin Pharmacol Toxicol 2009; 104:222-7. [PMID: 19175366 DOI: 10.1111/j.1742-7843.2008.00366.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pteropodine is a heterohimbine-type oxindole alkaloid specifically isolated from 'Cat's claw' (Uncaria tomentosa), a plant that has shown cytostatic, anti-inflammatory and antimutagenic properties and is used in traditional medicine to cure a number of diseases. In this report, we studied the ability of pteropodine to decrease the rate of sister-chromatid exchanges and micronucleated polychromatic erythrocytes in mice administered doxorubicin. We also determined its capacity to induce lymphocyte production in mice as well as its free radical scavenging potential by applying the DPPH assay. We found pteropodine (100-600 mg/kg) to significantly decrease the frequency of sister-chromatid exchanges and micronucleated polychromatic erythrocytes in mice administered with 10 mg/kg of doxorubicin. Furthermore, we determined that pteropodine partially corrected bone marrow cytotoxicity induced by doxorubicin, as it showed an improvement in the rate of polychromatic erythrocytes. Besides, 600 mg/kg of pteropodine increased 25.8% of the production of lymphocytes over the control value along a 96-hr assay, and it exhibited a strong capacity to trap the DPPH-free radical (98.26% with 250 microg/ml). Our results establish that pteropodine is an effective antimutagen in the model used, and suggest that pteropodine deserves further research in the area of cell protective potential and its mechanism of action.
Collapse
Affiliation(s)
- Rogelio Paniagua-Pérez
- Laboratory of Muscular Biochemistry, National Institute of Reahabilitation, National School of Biological Sciences, I.P.N., Carpio y Plan de Ayala s/n, Sto. Tomás, D.F., Mexico
| | | | | | | | | | | | | |
Collapse
|
29
|
Tanaka K, Kumaravel TS, Ihda S, Kamada N. Characterization of late-arising chromosome aberrations in human B-cell lines established from alpha-ray- or gamma-ray-irradiated lymphocytes. ACTA ACUST UNITED AC 2008; 187:112-24. [PMID: 19027492 DOI: 10.1016/j.cancergencyto.2008.08.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2008] [Revised: 07/29/2008] [Accepted: 08/07/2008] [Indexed: 11/28/2022]
Abstract
To clarify the characteristics of late-arising (delayed) chromosome aberrations after irradiation in human lymphocytes, 30 B-cell lines were established from the peripheral blood from a healthy adult donor, the lymphocytes of which were exposed to alpha-rays or gamma-rays and then used for experiments. Chromosome aberrations were serially observed at several passages by both conventional cytogenetics and fluorescence in situ hybridization analysis using subtelomere probes. These B-cell lines derived from lymphocytes with a history of radiation exposure had higher percentages of delayed chromosome aberrations, such as dicentrics, rings, endoreduplication, hyperdiploid, hyperploidy, and telomere association. Furthermore, alpha-ray exposure induced higher chromosome instability than gamma-ray exposure, indicating that delayed chromosome aberrations were related with radiation quality. Chromosome instabilities were also observed at the subtelomere. Cell lines showing high chromosome instability had high DNA-PK activity, low expressions of Ku70, p53, and TRF1 proteins after stimulation with radiation. These results indicate that mechanisms underlying delayed chromosome aberrations might be epigenetic, and multiple factors such as defects of DNA-PK, subtelomere, and telomere might be associated.
Collapse
Affiliation(s)
- Kimio Tanaka
- Department of Radiobiology, Institute for Environmental Sciences, Rokkasho, Aomori 039-3213, Japan.
| | | | | | | |
Collapse
|
30
|
Atteritano M, Pernice F, Mazzaferro S, Mantuano S, Frisina A, D'Anna R, Cannata ML, Bitto A, Squadrito F, Frisina N, Buemi M. Effects of phytoestrogen genistein on cytogenetic biomarkers in postmenopausal women: 1 year randomized, placebo-controlled study. Eur J Pharmacol 2008; 589:22-6. [DOI: 10.1016/j.ejphar.2008.04.049] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2007] [Revised: 03/20/2008] [Accepted: 04/02/2008] [Indexed: 10/22/2022]
|
31
|
JANSSON TOMMY. The frequency of sister chromatid exchanges in human lymphocytes treated with ethanol and acetaldehyde. Hereditas 2008. [DOI: 10.1111/j.1601-5223.1982.tb00883.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
32
|
PRINA AR, HAGBERG A. A barley mutant with chromosome condensation in late tetrad stage. Hereditas 2008. [DOI: 10.1111/j.1601-5223.1984.tb00925.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
33
|
HEDNER K, HOGSTEDT B, KOLNIG AM, MARK-VENDEL E, STROMBECK B, MITELMAN F. Relationship between sister chromatid exchanges and structural chromosome aberrations in lymphocytes of 100 individuals. Hereditas 2008. [DOI: 10.1111/j.1601-5223.1982.tb00877.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
34
|
Abstract
Two requirements for the cytogenetic analysis of sister-chromatid exchanges (SCEs) in somatic cells are (1) a population of actively proliferating cells that will provide an adequate number of metaphases and (2) sister chromatids that in some way are differentially labeled or stained in the metaphases. SCEs can be recognized as abrupt discontinuities in the staining patterns of the two chromatids of a metaphase chromosome at what appear to be identical sites, with reciprocal switching from one chromatid to its sister. This protocol uses phytohemagglutinin (PHA)-stimulated cultures of blood lymphocytes as a source of proliferating cells. The cells are incubated with the thymidine analog BrdU. Slides prepared from fixed cells with BrdU-substituted chromosomes are treated with Hoechst 33258, exposed to light and heat, and then Giemsa-stained to produce differentially stained chromosomes. The chromatids with bifilar substitution exhibit a lighter purple stain than their unifilarly substituted sister chromatids.
Collapse
Affiliation(s)
- J German
- New York Blood Center, New York, New York, USA
| | | |
Collapse
|
35
|
Paniagua-Pérez R, Madrigal-Bujaidar E, Reyes-Cadena S, Molina-Jasso D, Pérez Gallaga J, Silva-Miranda A, Velazco O, Hernández N, Chamorro G. Genotoxic and cytotoxic studies of beta-sitosterol and pteropodine in mouse. J Biomed Biotechnol 2008; 2005:242-7. [PMID: 16192682 PMCID: PMC1224701 DOI: 10.1155/jbb.2005.242] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Beta-sitosterol (BS) and pteropodine (PT) are
constituents of various plants with pharmacological activities
potentially useful to man. The chemicals themselves possess
biomedical properties related to the modulation of the immune
and the nervous systems, as well as to the inflammatory
process. Therefore, safety evaluation of the compounds is
necessary in regard to their probable beneficial use in human
health. The present study evaluates their genotoxic and cytotoxic
potential by determining the capacity of the compounds to induce
sister chromatid exchanges (SCE), or to alter cellular
proliferation kinetics (CPK) and the mitotic index (MI) in mouse
bone marrow cells. Besides, it also determines their capacity to
increase the rate of micronucleated polychromatic
erythrocytes (MNPE) in peripheral mouse blood, and the
relationship polychromatic erythrocytes/normochromatic
erythrocytes (PE/NE) as an index of cytotoxicity. For the
first assay, four doses of each compound were tested: 200, 400,
600, and 1000 mg/kg in case of BS, and 100, 200, 300, and
600 mg/kg for PT. The results in regard to both agents showed
no SCE increase induced by any of the tested doses, as well as no
alteration in the CPK, or in the MI. With respect to the second
assay, the results obtained with the two agents were also
negative for both the MNPE and the PE/NE index along the daily
evaluation made for four days. In the present study, the highest
tested dose corresponded to 80% of the LD50 obtained for BS and
to 78% in the case of PT. The results obtained establish that
the studied agents have neither genotoxic nor cytotoxic effect on
the model used, and therefore they encourage studies on their
pharmacological properties.
Collapse
Affiliation(s)
- R. Paniagua-Pérez
- Laboratorio de Bioquímica, Centro Nacional de Rehabilitación/Medicina de Rehabilitación, México DF 14389, Mexico
| | - E. Madrigal-Bujaidar
- Laboratorio de Genética, Escuela Nacional de Ciencias Biológicas, IPN, México DF 11340, Mexico
- *E. Madrigal-Bujaidar:
| | - S. Reyes-Cadena
- Laboratorio de Bioquímica, Centro Nacional de Rehabilitación/Medicina de Rehabilitación, México DF 14389, Mexico
| | - D. Molina-Jasso
- Laboratorio de Genética, Escuela Nacional de Ciencias Biológicas, IPN, México DF 11340, Mexico
| | - J. Pérez Gallaga
- Laboratorio de Bioquímica, Centro Nacional de Rehabilitación/Medicina de Rehabilitación, México DF 14389, Mexico
| | - A. Silva-Miranda
- Laboratorio de Bioquímica, Centro Nacional de Rehabilitación/Medicina de Rehabilitación, México DF 14389, Mexico
| | - O. Velazco
- Laboratorio de Bioquímica, Centro Nacional de Rehabilitación/Medicina de Rehabilitación, México DF 14389, Mexico
| | - N. Hernández
- Laboratorio de Bioquímica, Centro Nacional de Rehabilitación/Medicina de Rehabilitación, México DF 14389, Mexico
| | - G. Chamorro
- Laboratorio de Toxicología Preclínica, Escuela Nacional de Ciencias Biológicas, IPN, México DF 11340, Mexico
| |
Collapse
|
36
|
Stenstrand K. Effects of ionizing radiation on chromosome aberrations, sister chromatid exchanges and micronuclei in lymphocytes of smokers and nonsmokers. Hereditas 2008; 102:71-6. [PMID: 3988542 DOI: 10.1111/j.1601-5223.1985.tb00467.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
37
|
|
38
|
Högstedt B, Gullberg B, Hedner K, Kolnig AM, Mitelman F, Skerfving S, Widegren B. Chromosome aberrations and micronuclei in bone marrow cells and peripheral blood lymphocytes in humans exposed to ethylene oxide. Hereditas 2008; 98:105-13. [PMID: 6853215 DOI: 10.1111/j.1601-5223.1983.tb00585.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
|
39
|
Hedner K, Högstedt B, Kolnig AM, Mark-Vendel E, Strömbeck B, Mitelman F. Sister chromatid exchanges and structural chromosome aberrations in relation to smoking in 91 individuals. Hereditas 2008; 98:77-81. [PMID: 6853220 DOI: 10.1111/j.1601-5223.1983.tb00581.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
|
40
|
Karaman A, Aliağaoğlu C, Pirim I. Sister chromatid exchange analysis in patients with psoriasis. Exp Dermatol 2008; 17:524-9. [PMID: 18177351 DOI: 10.1111/j.1600-0625.2007.00671.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Psoriasis is a common, chronic inflammatory skin disease with unknown aetiology. An increased reactive oxygen species (ROS) and insufficient antioxidant activity have been determined in psoriatic lesions. The analysis of sister chromatid exchange (SCE) is a cytogenetic technique used to show DNA damage caused by an exchange of DNA fragments between sister chromatids. The study aimed to determine the rates of SCE in psoriatic patients (17 female and 19 male) and healthy controls (15 female and 15 male) as well as superoxide dismutase (SOD), glutathione peroxidase (GP) and catalase (CAT) activity in both groups. We found significantly higher SCE rates in the patients (P < 0.00001). In addition, statistically significant decreased levels of erythrocyte SOD and CAT activities were noted in the patients(P < 0.001 and P < 0.05 respectively). Furthermore, a statistically significant increased erythrocyte GP activity was found in the psoriasis group (P < 0.05). Our results indicate that chromosomal instability may play an important part in the aetiology of psoriasis. In addition, the results support the hypothesis of an imbalance in the oxidant-antioxidant system in psoriasis.
Collapse
Affiliation(s)
- Ali Karaman
- Department of Medical Genetics, State Hospital, Erzurum, Turkey.
| | | | | |
Collapse
|
41
|
Dartsch DC, Gieseler F. Repair of idarubicin-induced DNA damage: A cause of resistance? DNA Repair (Amst) 2007; 6:1618-28. [PMID: 17616443 DOI: 10.1016/j.dnarep.2007.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2006] [Revised: 05/23/2007] [Accepted: 05/24/2007] [Indexed: 10/23/2022]
Abstract
Idarubicin, a widely used anticancer drug inhibits topoisomerase (topo) IIalpha and induces DNA double strand breaks. The finding that idarubicin-induced DNA damage is repaired before cell death is initiated encouraged us to examine the role of DNA repair for the cytotoxicity of idarubicin in human promyelocytic HL60 leukaemia cells. We found that DNA double strand breaks induced by a 90 min transient exposure to 0.5 microgml(-1) idarubicin were rapidly repaired throughout the whole population, while topo IIalpha itself was degraded. In spite of DNA repair, the vast majority of cells died within 40 h. Using differential staining of the chromatids and microscopic evaluation of DNA break points, we found evidence for a high number of false ligations of loose DNA strands arising from the inhibition of topo IIalpha action by idarubicin. If mainly actively transcribed genes are affected, this results in a disruption of vital genetic information, of regulatory sequences and, ultimately, in induction of the cell death pathway. Our results confirm the hypothesis that misrepair of DNA damage is a decisive event in idarubicin-induced cell death. They are discussed in the context of topo IIalpha-function and the currently known mechanisms of DNA double strand break repair.
Collapse
Affiliation(s)
- Dorothee C Dartsch
- Hamburg University, Institute of Pharmacy, Bundesstr. 45, 20146 Hamburg, Germany.
| | | |
Collapse
|
42
|
Oztas S, Salman AB, Tatar A, Yigiter M, Yazgi H, Ertek M, Yesilyurt A, Ocak Z, Kursad H. Genotoxic effect of albendazole in pediatric patients with hepatic hydatid disease. Int J Infect Dis 2007; 11:446-9. [PMID: 17331781 DOI: 10.1016/j.ijid.2007.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2006] [Revised: 12/18/2006] [Accepted: 01/16/2007] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE Hydatid disease occurs throughout the world and is treated with both surgery and medical administration of albendazole. Some adverse effects of albendazole are known. However, its genotoxic effect on humans has not been reported yet. In this study, we aimed to investigate the genotoxic effect of albendazole on human lymphocytes in vivo. METHODS The study involved 14 children (eight males and six females) who had undergone operations for hepatic hydatid disease. The ages of the patients ranged from 6 to 13 years. Genotoxicity of albendazole was evaluated as the frequency of sister chromatid exchange (SCE) and micronucleated cells in the patient's lymphocytes. Prior to and after albendazole treatment, blood samples were obtained from these patients for SCE and micronucleus (MN) studies. SCE and MN frequencies of the patients were measured separately before and after albendazole treatment. RESULTS All patient SCE values increased significantly after albendazole administration (p<0.001). Similarly, MN frequencies in all the patients increased significantly following albendazole treatment (p<0.001). CONCLUSION This study revealed that both SCE and MN frequencies are higher after albendazole treatment. The results suggest that albendazole may be genotoxic to human lymphocytes in vivo.
Collapse
Affiliation(s)
- Sitki Oztas
- Department of Medical Genetics, Ataturk University Medical Faculty, 25240 Erzurum, Turkey.
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Oztas S, Gullulu G, Tatar A, Astam N, Akyol I, Karakuzu A, Aktas A, Odabas AR. Chromosome and sister chromatid exchange studies in Behcet's patients. J Dermatol 2006; 33:406-10. [PMID: 16700831 DOI: 10.1111/j.1346-8138.2006.00096.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Behcet's disease is a chronic multisystemic disease of unknown pathogenesis characterized by four major symptoms: oral aphthous ulcers, skin lesions, ocular symptoms and genital ulcerations. The disease is spread throughout the world, but it is most frequent in Turkey, Japan, Korea and China. Although HLA-Bw51 has been found to predominate in Behcet's cases, the genetic etiology has not yet been clarified. In this study, we investigated the chromosomal abnormalities and sister chromatid exchange rates in patients with Behcet's diseases. Thirty-eight patients with Behcet's disease (diagnosed for the first time) and 30 healthy subjects (as controls) were included in this study. Although numerical and structural chromosomal abnormalities were not detected in our patients, we found an increased rate of sister chromatid exchange in patients over the control groups (P < 0.01). On the basis of these results, we discuss the genetic etiology of Behcet's disease.
Collapse
Affiliation(s)
- Sitki Oztas
- Department of Medical Genetics, Ataturk University Medical Faculty, Erzurum, Turkey.
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Pernice F, Floccari F, Caccamo C, Belghity N, Mantuano S, Pacilè ME, Romeo A, Nostro L, Barillà A, Crascì E, Frisina N, Buemi M. Chromosomal damage and atherosclerosis. A protective effect from simvastatin. Eur J Pharmacol 2006; 532:223-9. [PMID: 16483569 DOI: 10.1016/j.ejphar.2006.01.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Revised: 11/30/2005] [Accepted: 01/10/2006] [Indexed: 12/01/2022]
Abstract
In uremic patients, the frequency of sister chromatid exchanges appears markedly higher than in the general population. Statins are well known for their pleiotropic effects, which are independent of any reduction in cholesterol circulating levels. The aim of the present study was to determine the effects of exposure to escalating doses of simvastatin on the sister chromatid exchange rate in cultured lymphocytes in order to identify the influence of statin on genomic damage. Peripheral lymphocytic samples for culture were obtained from 25 healthy volunteers, 20 patients with documented carotid atherosclerosis and 30 atherosclerotic patients on maintenance regular acetate-free biofiltration. Hemodialyzed patients had a greater percentage of high frequency cells (50%) than healthy controls (3%) and a significantly higher average number of sister chromatid (9.82+/-2.1 vs. 4.65+/-2.18). The subgroup of hemodialyzed patients with high plaque score values was characterized by significantly greater values for both sister chromatid exchanges rate and high frequency cells percentage. Our findings demonstrate that there is an association between sister chromatid exchanges and high frequency cells rate and atherosclerosis in acetate-free biofiltration patients. In cultures with added simvastatin, high frequency cells percentages and mean sister chromatid exchanges levels were significantly lower than in cultures with an added vehicle alone, the reduction occurring in a dose-dependent fashion, above all in cultures from end stage renal disease patients. The findings, moreover, demonstrate new effects of simvastatin, which appeared to mitigate the expression of genomic damage in our model. However, it is not yet clear whether this effect is due to the prevention of genomic damage or to the potentiation of the DNA repair capacity. Statins may therefore have an anti-atherogenic action partly ascribable to their ability to provide protection against the development of atherosclerotic plaque.
Collapse
Affiliation(s)
- Franco Pernice
- Department of Internal Medicine, University of Messina, Italy
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Yildirim M, Ikbal M, Tos T, Seven B, Pirim I, Varoglu E. Genotoxicity of thallium-201 in patients with angina pectoris undergoing myocardial perfusion study. TOHOKU J EXP MED 2005; 206:299-304. [PMID: 15997200 DOI: 10.1620/tjem.206.299] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Thallium-201 (201Tl) has been widely used as a nuclear reagent for myocardial blood flow imaging. The purpose of this study was to investigate genotoxic effects of 201Tl in patients with angina pectoris (n = 21), who had undergone myocardial perfusion imaging. Lymphocytes were isolated from each patient before, and 3, 30 and 90 days after 201Tl administration (111 MBq, 3 mCi) and were analyzed for chromosomal aberrations, sister chromatid exchanges, mitotic index and replicative index. There were significant increases in chromosomal aberrations and sister chromatid exchanges 3 days after 201Tl administration (p < 0.001), although no difference was noted in these values after 30 and 90 days (p > 0.05). Moreover, decreased mitotic index and replicative index were noted after 3 days of 201Tl administration (p < 0.001). These results suggest that the administration of 201Tl for myocardial blood flow imaging may induce genetic damage.
Collapse
Affiliation(s)
- Mustafa Yildirim
- Department of Nuclear Medicine, Ataturk University, Medical Faculty, Erzurum, Turkey.
| | | | | | | | | | | |
Collapse
|
46
|
Raposo A, Carvalho CR, Otoni WC. Statistical and image analysis of sister chromatid exchange in maize. Hereditas 2005; 141:318-22. [PMID: 15703049 DOI: 10.1111/j.1601-5223.2004.01848.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The present study reports the use of the fluorescence plus Giemsa (FPG) technique, image analysis and statistical methods to assess the sister chromatid exchanges (SCEs) frequency in maize. Roots derived from germinated maize seeds were treated with BrdU solution and fixed. The slides were prepared by enzymatic cellular dissociation, air-drying technique, stained with Hoechst 33258 fluorochrome, and incubated in salt solution. The chromosomes were irradiated with ultraviolet light and stained with Giemsa solution. The FPG technique associated with digital analysis system was used to measure the length of 597 BrdU-incorporated maize chromosomes and to identify 0.5243 SCE per chromosome. A range from 0 to 4 SCE events were classified and the chi-square test (chi2=1.586, P=0.662) showed a good fit to the hypothesis that the SCEs are independent and random events that follow Poisson distribution. The SCE frequencies in long and short chromosome arms corresponded to a mean value of 0.876 SCE microm(-1). Considering that the maize line used in this study contains 5.78 picogram (pg) DNA (2C value) in interphasic G0/G1 nuclei or 11.56 pg DNA (4C value) in metaphase, and that the DNA mean value corresponds to 0.578 pg/metaphasic chromosome, the analysis suggests an occurrence of approximately 0.9 SCE/pg DNA.
Collapse
Affiliation(s)
- Andréa Raposo
- Plant Cytogenetics Laboratory, General Biology Department, Federal University of Viçosa, Viçosa, MG-Brazil
| | | | | |
Collapse
|
47
|
Kim MK, Zitzmann S, Westermann F, Arnold K, Brouwers S, Schwab M, Savelyeva L. Increased rates of spontaneous sister chromatid exchange in lymphocytes of BRCA2+/- carriers of familial breast cancer clusters. Cancer Lett 2004; 210:85-94. [PMID: 15172125 DOI: 10.1016/j.canlet.2004.01.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2004] [Accepted: 01/15/2004] [Indexed: 12/20/2022]
Abstract
Heterozygous carriers of germ-line mutations of the BRCA2 breast cancer susceptibility gene are predisposed to breast, ovarian, pancreatic and other cancers. The BRCA2 protein is implicated in the maintenance of chromosome stability through its essential function in double-strand DNA repair and recombination. Our previous studies had revealed multiple intrachromosomal rearrangements, duplications, inversions and deletions on 9p23-24 in lymphocytes and fibroblasts of BRCA2+/- members from independently ascertained familial breast cancer clusters. In pursuit of evaluating if there is a subtle genomic instability in BRCA2+/- individuals, we have determined frequencies of spontaneous sister chromatid exchanges (SCEs) in BRCA2 wild-types and BRCA2 mutation carriers of two familial breast cancer clusters. Here, we demonstrate an average increase of 65% of spontaneous SCEs in BRCA2+/- versus BRCA2+/+ family members. In one cluster, the number of metaphases with multiple SCEs was 5-times higher in BRCA2+/- compared to wild-type members, while in the second cluster BRCA2+/- members had 8.9% of metaphases with multiple SCEs compared to a level below detection in BRCA2 wild types. To investigate the correlation between SCE and genomic instability in 9p, we performed fluorescence detection of SCEs and FISH analysis with 9p probes. The frequency of SCE in 9p of BRCA2 mutation carriers was 3-4 fold (P = 0.005) higher compared to BRCA2 wild-types. Collectively, the increased rates of SCE in BRCA2 heterozygous mutation carriers indicate a BRCA2 haploinsufficiency, which might be an important factor for the accumulation of structural chromosomal alterations with the consequence of damage in as yet unidentified genes.
Collapse
Affiliation(s)
- Min-Kyoung Kim
- Deutsches Krebsforschungszentrum, Abteilung Tumorgenetik B030, Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany
| | | | | | | | | | | | | |
Collapse
|
48
|
Stephanou G, Andrianopoulos C, Tyrakis M, Konti M, Demopoulos NA, Tsambaos D. In vitro antigenotoxic potential of acitretin in human lymphocytes treated with the antineoplastic alkylating agent ASE (NSC-71964). Toxicol In Vitro 2004; 18:609-16. [PMID: 15251178 DOI: 10.1016/j.tiv.2004.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2003] [Accepted: 02/06/2004] [Indexed: 10/26/2022]
Abstract
Acitretin is widely used in the systemic treatment of severe forms of psoriasis and other skin disorders. ASE, namely 3beta-hydroxy-13alpha-amino-13,17-seco-5alpha-androstan-17-oic-13,17-lactam-p-bis(2-chloro-ethyl)amino phenylacetate (AzaSteroidalEster, NSC-71964), is an alkylating agent with antineoplastic activity and mutagenic properties. The aim of this study was to investigate the possible genotoxic and/or antigenotoxic effects of acitretin in human lymphocyte cultures in vitro, using sister chromatid exchange (SCE) and cytokinesis-blocked micronucleus (CBMN) assays. Micronucleus (MN) analysis was achieved in combination with fluorescence in situ hybridization (FISH), using an alpha-satellite DNA pancentromeric probe. It was found that acitretin alone demonstrated no clastogenic or aneugenic activity. However, simultaneous incubation of lymphocyte cultures with ASE and acitretin resulted in a reduction of ASE-induced SCEs. For MN analysis lymphocytes were treated with ASE and acitretin at 21 and 41 h after culture initiation, corresponding to G1 and G2 phases, respectively, and lasted until cell harvest. Acitretin caused a decrease in ASE-induced MN when treatment of cells started at 41 h, but exerted no effect on them when treatment started at 21 h. These findings suggest that acitretin exerts antigenotoxic effects in human lymphocyte cultures, the expression of which may be related to the cycle phase of the cells upon onset and duration of the treatment, at least as far as MN frequency is concerned.
Collapse
Affiliation(s)
- G Stephanou
- Department of Biology, Division of Genetics Cell and Developmental Biology, University of Patras, Rion, 26500 Patras, Greece.
| | | | | | | | | | | |
Collapse
|
49
|
Wegner R, Radon K, Heinrich-Ramm R, Seemann B, Riess A, Koops F, Poschadel B, Szadkowski D. Biomonitoring results and cytogenetic markers among harbour workers with potential exposure to river silt aerosols. Occup Environ Med 2004; 61:247-53. [PMID: 14985520 PMCID: PMC1740722 DOI: 10.1136/oem.2003.007146] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Workers on dredgers and lighters on rivers are potentially exposed to a variety of substances. AIMS To determine the internal load of heavy metals and arsenic as well as levels of cytogenetic markers in workers exposed to river silt aerosols. METHODS One hundred exposed workers were examined up to eight times within three years. Additionally, 100 control workers were studied once. Blood samples were analysed for lead, mercury, and cadmium. Additionally, micronuclei frequency and sister chromatid exchange (SCE) rates were determined. Urinary samples were analysed for cadmium, mercury, nickel, chromium, and arsenic. Information on potential confounders, such as smoking habits and consumption of fish were assessed. RESULTS Apart from some increased concentrations of mercury in blood (maximum 14.6 microg/l) and arsenic in urine (maximum 356.5 microg/l) all measurements were within reference values. None of the exposure and effect markers were found to be significantly increased in exposed workers compared to non-exposed controls. In multiple linear regression models, mercury levels in blood as well as the concentration of arsenic in urine were strongly related to fish consumption. Cadmium levels in blood as well as urinary cadmium concentrations were strongly related to smoking habits. After adjusting for smoking habits, SCE rates were associated with cadmium levels in blood. CONCLUSION Increased exposure levels or enhanced levels of cytogenetic markers were not found in workers exposed to river silt aerosols. However, cadmium exposure in blood was related to SCE frequency.
Collapse
Affiliation(s)
- R Wegner
- Ordinariat für Arbeitsmedizin der Universi-tät und Zentralinstitut für Arbeitsmedizin der Freien und Hansestadt Hamburg, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Bozkurt G, Yuksel M, Karabogaz G, Sut N, Savran FO, Palanduz S, Yigitbasi ON, Algunes C. Sister chromatid exchanges in lymphocytes of nuclear medicine physicians. Mutat Res 2003; 535:205-13. [PMID: 12581539 DOI: 10.1016/s1383-5718(02)00321-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE The aim of this study was to assess whether occupational exposure to chronic, low doses of Iodine 131 (I-131) and Technetium 99m (Tc-99m) may lead to genotoxicity. Medical personnel occupied in nuclear medicine departments are occupationally exposed to low doses of I-131 and Tc-99m. The determination of the frequency of sister chromatid exchanges (SCEs) and of cells with a high frequency of SCEs (HFC) is considered to be a sensitive indicator for detecting genotoxic potential of mutagenic and carcinogenic agents. Therefore, we examined peripheral lymphocytes from nuclear medicine physicians for the presence of both SCE and HFC. METHODS Sixteen exposed nuclear medicine physicians (non-smokers) were compared to 16 physicians (non-smokers) who had not been exposed to chemical or physical mutagens in their usual working environment at the same hospital. RESULTS A statistically significant difference was found between SCE frequencies and HFC percentages measured in lymphocytes from the exposed and control groups. CONCLUSIONS The present observation on the effect of chronic low doses of I-131 and Tc-99m indicates the possibility of genotoxic implications of this type of occupational exposure. Hence, the personnel who work in nuclear medicine departments should carefully apply the radiation protection procedures and should minimize, as low as possible, radiation exposure to avoid possible genotoxic effects.
Collapse
Affiliation(s)
- Gokay Bozkurt
- Department of Medical Biology, Trakya University Medical Faculty, 22030, Edirne, Turkey.
| | | | | | | | | | | | | | | |
Collapse
|