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Karahan G, Martel J, Rahimi S, Farag M, Matias F, MacFarlane AJ, Chan D, Trasler J. Higher incidence of embryonic defects in mouse offspring conceived with assisted reproduction from fathers with sperm epimutations. Hum Mol Genet 2023; 33:48-63. [PMID: 37740387 PMCID: PMC10729866 DOI: 10.1093/hmg/ddad160] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/30/2023] [Accepted: 09/13/2023] [Indexed: 09/24/2023] Open
Abstract
Assisted reproductive technologies (ART) account for 1-6% of births in developed countries. While most children conceived are healthy, increases in birth and genomic imprinting defects have been reported; such abnormal outcomes have been attributed to underlying parental infertility and/or the ART used. Here, we assessed whether paternal genetic and lifestyle factors, that are associated with male infertility and affect the sperm epigenome, can influence ART outcomes. We examined how paternal factors, haploinsufficiency for Dnmt3L, an important co-factor for DNA methylation reactions, and/or diet-induced obesity, in combination with ART (superovulation, in vitro fertilization, embryo culture and embryo transfer), could adversely influence embryo development and DNA methylation patterning in mice. While male mice fed high-fat diets (HFD) gained weight and showed perturbed metabolic health, their sperm DNA methylation was minimally affected by the diet. In contrast, Dnmt3L haploinsufficiency induced a marked loss of DNA methylation in sperm; notably, regions affected were associated with neurodevelopmental pathways and enriched in young retrotransposons, sequences that can have functional consequences in the next generation. Following ART, placental imprinted gene methylation and growth parameters were impacted by one or both paternal factors. For embryos conceived by natural conception, abnormality rates were similar for WT and Dnmt3L+/- fathers. In contrast, paternal Dnmt3L+/- genotype, as compared to WT fathers, resulted in a 3-fold increase in the incidence of morphological abnormalities in embryos generated by ART. Together, the results indicate that embryonic morphological and epigenetic defects associated with ART may be exacerbated in offspring conceived by fathers with sperm epimutations.
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Affiliation(s)
- Gurbet Karahan
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Mena Farag
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
| | - Fernando Matias
- Nutrition Research Division, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | | | - Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
| | - Jacquetta Trasler
- Department of Human Genetics, McGill University, Montreal, QC, H3A 0C7, Canada
- Research Institute of the McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, H3G 1Y6, Canada
- Department of Pediatrics, McGill University Health Centre, Montreal, QC, H4A 3J1, Canada
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Rahimi S, Shao X, Chan D, Martel J, Bérard A, Fraser WD, Simon MM, Kwan T, Bourque G, Trasler J. Capturing sex-specific and hypofertility-linked effects of assisted reproductive technologies on the cord blood DNA methylome. Clin Epigenetics 2023; 15:82. [PMID: 37170172 PMCID: PMC10176895 DOI: 10.1186/s13148-023-01497-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 05/02/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND Children conceived through assisted reproduction are at an increased risk for growth and genomic imprinting disorders, often linked to DNA methylation defects. It has been suggested that assisted reproductive technology (ART) and underlying parental infertility can induce epigenetic instability, specifically interfering with DNA methylation reprogramming events during germ cell and preimplantation development. To date, human studies exploring the association between ART and DNA methylation defects have reported inconsistent or inconclusive results, likely due to population heterogeneity and the use of technologies with limited coverage of the epigenome. In our study, we explored the epigenetic risk of ART by comprehensively profiling the DNA methylome of 73 human cord blood samples of singleton pregnancies (n = 36 control group, n = 37 ART/hypofertile group) from a human prospective longitudinal birth cohort, the 3D (Design, Develop, Discover) Study, using a high-resolution sequencing-based custom capture panel that examines over 2.4 million autosomal CpGs in the genome. RESULTS We identified evidence of sex-specific effects of ART/hypofertility on cord blood DNA methylation patterns. Our genome-wide analyses identified ~ 46% more CpGs affected by ART/hypofertility in female than in male infant cord blood. We performed a detailed analysis of three imprinted genes which have been associated with altered DNA methylation following ART (KCNQ1OT1, H19/IGF2 and GNAS) and found that female infant cord blood was associated with DNA hypomethylation. When compared to less invasive procedures such as intrauterine insemination, more invasive ARTs (in vitro fertilization, intracytoplasmic sperm injection, embryo culture) resulted in more marked and distinct effects on the cord blood DNA methylome. In the in vitro group, we found a close to fourfold higher proportion of significantly enriched Gene Ontology terms involved in development than in the in vivo group. CONCLUSIONS Our study highlights the ability of a sensitive, targeted, sequencing-based approach to uncover DNA methylation perturbations in cord blood associated with hypofertility and ART and influenced by offspring sex and ART technique invasiveness.
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Affiliation(s)
- Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Xiaojian Shao
- Digital Technologies Research Centre, National Research Council Canada, Ottawa, ON, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Donovan Chan
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Anick Bérard
- Research Unit On Medications and Pregnancy, Research Centre, CHU Sainte-Justine, Montreal, Canada
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
- Faculty of Medicine, Université Claude Bernard Lyon 1, Lyon, France
| | - William D Fraser
- Department of Obstetrics and Gynecology, Université de Sherbrooke and Centre de Recherche du CHUS, Sherbrooke, QC, Canada
| | | | - Tony Kwan
- McGill University Genome Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Guillaume Bourque
- McGill University Genome Centre, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Jacquetta Trasler
- Research Institute of the McGill University Health Centre, Montreal, QC, Canada.
- Department of Human Genetics, McGill University, Montreal, QC, Canada.
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada.
- Department of Pediatrics, McGill University, Montreal, QC, Canada.
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Ihirwe RG, Martel J, Rahimi S, Trasler J. Protective and sex-specific effects of moderate dose folic acid supplementation on the placenta following assisted reproduction in mice. FASEB J 2023; 37:e22677. [PMID: 36515682 PMCID: PMC10108070 DOI: 10.1096/fj.202201428r] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/02/2022] [Accepted: 11/21/2022] [Indexed: 12/15/2022]
Abstract
Epigenetic defects induced by assisted reproductive technologies (ART) have been suggested as a potential mechanism contributing to suboptimal placentation. Here, we hypothesize that ART perturbs DNA methylation (DNAme) and gene expression during early placenta development, leading to abnormal placental phenotypes observed at term. Since folic acid (FA) plays a crucial role in epigenetic regulation, we propose that FA supplementation can rescue ART-induced placental defects. Female mice were placed on a control diet (CD), a moderate 4-fold (FAS4) or high dose 10-fold (FAS10) FA-supplemented diet prior to ART and compared to a natural mating group. ART resulted in 41 and 28 differentially expressed genes (DEGs) in E10.5 female and male placentas, respectively. Many DEGs were implicated in early placenta development and associated with DNAme changes; a number clustered at known imprinting control regions (ICR). In females, FAS4 partially corrected alterations in gene expression while FAS10 showed evidence of male-biased adverse effects. DNAme and gene expression for five genes involved in early placentation (Phlda2, EphB2, Igf2, Peg3, L3mbtl1) were followed up in placentas from normal as well as delayed and abnormal embryos. Phlda2 and Igf2 expression levels were lowest after ART in placentas of female delayed embryos. Moreover, ART concomitantly reduced DNAme at the Kcnq1ot1 ICR which regulates Phlda2 expression; FAS4 partially improved DNAme in a sex-specific manner. In conclusion, ART-associated placental DNAme and transcriptome alterations observed at mid-gestation are sex-specific; they may help explain adverse placental phenotypes detected at term and are partially corrected by maternal moderate dose FA supplementation.
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Affiliation(s)
- Rita Gloria Ihirwe
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Josée Martel
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Sophia Rahimi
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Jacquetta Trasler
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada.,Department of Pediatrics, McGill University, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
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Valipouri A, Rahimi S, Karkhane A, Torshizi MAK, Mobarez AM, Grimes J. Immunization of broiler chickens with recombinant alpha-toxin protein for protection against necrotic enteritis#. J APPL POULTRY RES 2022. [DOI: 10.1016/j.japr.2022.100299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Yazdani-Kachoei M, Rahimi S, Ebrahimi-Jaberi R, Nematollahi J, Jalali-Asadabadi S. Thermoelectric properties plus phonon and de Haas-van Alphen frequencies of hole/electron-doped [Formula: see text]. Sci Rep 2022; 12:663. [PMID: 35027573 PMCID: PMC8758700 DOI: 10.1038/s41598-021-04058-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 12/15/2021] [Indexed: 11/08/2022] Open
Abstract
We investigate temperature, pressure, and localization dependence of thermoelectric properties, phonon and de Haas-van Alphen (dHvA) frequencies of the anti-ferromagnetic (AFM) CeIn[Formula: see text] using density functional theory (DFT) and local, hybrid, and band correlated functionals. It is found that the maximum values of thermopower, power factor, and electronic figure of merit of this compound occur at low (high) temperatures provided that the 4f-Ce electrons are (not) localized enough. The maximum values of the thermopower, power factor, electronic figure of merit (conductivity parameters), and their related doping levels (do not) considerably depend on the localization degree and pressure. The effects of pressure on these parameters substantially depend on the degree of localization. The phonon frequencies are calculated to be real which shows that the crystal is dynamically stable. From the phonon band structure, the thermal conductivity is predicted to be homogeneous. This prediction is found consistent with the thermal conductivity components calculated along three Cartesian directions. In analogous to the thermoelectric properties, it is found that the dHvA frequencies also depend on both pressure and localization degree. To ensure that the phase transition at Néel temperature cannot remarkably affect the results, we verify the density of states (DOS) of the compound at the paramagnetic phase constructing a non-collinear magnetic structure where the angles of the spins are determined so that the resultant magnetic moment vanishes. The non-collinear results reveal that the DOS and whence the thermoelectric properties of the compound are not changed considerably by the phase transition. To validate the accuracy of the results, the total and partial DOSs are recalculated using DFT plus dynamical mean-field theory (DFT+DMFT). The DFT+DMFT DOSs, in agreement with the hybrid DOSs, predict the Kondo effect in this compound.
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Affiliation(s)
- M. Yazdani-Kachoei
- Department of Physics, Faculty of Physics, University of Isfahan (UI), Hezar Jerib Avenue, Isfahan, 81746-73441 Iran
| | - S. Rahimi
- Department of Physics, Faculty of Physics, University of Isfahan (UI), Hezar Jerib Avenue, Isfahan, 81746-73441 Iran
| | - R. Ebrahimi-Jaberi
- Department of Physics, Faculty of Physics, University of Isfahan (UI), Hezar Jerib Avenue, Isfahan, 81746-73441 Iran
| | - J. Nematollahi
- Department of Physics, Faculty of Physics, University of Isfahan (UI), Hezar Jerib Avenue, Isfahan, 81746-73441 Iran
| | - S. Jalali-Asadabadi
- Department of Physics, Faculty of Physics, University of Isfahan (UI), Hezar Jerib Avenue, Isfahan, 81746-73441 Iran
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Rahimi S, Martel J, Karahan G, Angle C, Behan NA, Chan D, MacFarlane AJ, Trasler JM. Moderate maternal folic acid supplementation ameliorates adverse embryonic and epigenetic outcomes associated with assisted reproduction in a mouse model. Hum Reprod 2020; 34:851-862. [PMID: 30989206 DOI: 10.1093/humrep/dez036] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 01/14/2019] [Indexed: 01/08/2023] Open
Abstract
STUDY QUESTION Could clinically-relevant moderate and/or high dose maternal folic acid supplementation prevent aberrant developmental and epigenetic outcomes associated with assisted reproductive technologies (ART)? SUMMARY ANSWER Our results demonstrate dose-dependent and sex-specific effects of folic acid supplementation in ART and provide evidence that moderate dose supplements may be optimal for both sexes. WHAT IS KNOWN ALREADY Children conceived using ART are at an increased risk for growth and genomic imprinting disorders, often associated with DNA methylation defects. Folic acid supplementation is recommended during pregnancy to prevent adverse offspring outcomes; however, the effects of folic acid supplementation in ART remain unclear. STUDY DESIGN, SIZE, DURATION Outbred female mice were fed three folic acid-supplemented diets, control (rodent daily recommended intake or DRI; CD), moderate (4-fold DRI; 4FASD) or high (10-fold DRI; 10FASD) dose, for six weeks prior to ART and throughout gestation. Mouse ART involved a combination of superovulation, in vitro fertilisation, embryo culture and embryo transfer. PARTICIPANTS/MATERIALS, SETTING, METHODS Midgestation embryos and placentas (n = 74-99/group) were collected; embryos were assessed for developmental delay and gross morphological abnormalities and embryos and placentas were examined for epigenetic defects. We assessed methylation at four imprinted genes (Snrpn, Kcnq1ot1, Peg1 and H19) in matched midgestation embryos and placentas (n = 31-32/group) using bisulfite pyrosequencing. In addition, we examined genome-wide DNA methylation patterns in placentas (n = 6 normal placentas per sex/group) and embryos (n = 6 normal female embryos/group; n = 3 delayed female embryos/group) using reduced representation bisulfite sequencing (RRBS). MAIN RESULTS AND THE ROLE OF CHANCE Moderate, but not high dose supplementation, was associated with a decrease in the proportion of developmentally delayed embryos. Although moderate dose folic acid supplementation reduced DNA methylation variance at certain imprinted genes in embryonic and placental tissues, high dose supplementation exacerbated the negative effects of ART at imprinted loci. Furthermore, folic acid supplements resolved female-biased aberrant imprinted gene methylation. Supplementation was more effective at correcting ART-induced genome-wide methylation defects in male versus female placentas; however, folic acid supplementation also led to additional methylation perturbations which were more pronounced in males. LARGE-SCALE DATA The RRBS data from this study have been submitted to the NCBI Gene Expression Omnibus under the accession number GSE123143. LIMITATIONS REASONS FOR CAUTION Although the combination of mouse ART utilised in this study consisted of techniques commonly used in human fertility clinics, there may be species differences. Therefore, human studies, designed to determine the optimal levels of folic acid supplementation for ART pregnancies, and taking into account foetal sex, are warranted. WIDER IMPLICATIONS OF THE FINDINGS Taken together, our findings support moderation in the dose of folic acid supplements taken during ART. STUDY FUNDING/COMPETING INTEREST(S) This work was funded by the Canadian Institutes of Health Research (FDN-148425). The authors declare no conflict of interest.
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Affiliation(s)
- Sophia Rahimi
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada.,Department of Human Genetics, McGill University, 3640 rue University, Montréal QC, Canada
| | - Josée Martel
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada
| | - Gurbet Karahan
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada.,Department of Human Genetics, McGill University, 3640 rue University, Montréal QC, Canada
| | - Camille Angle
- Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montréal QC, Canada
| | - Nathalie A Behan
- Nutrition Research Division, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa ON, Canada
| | - Donovan Chan
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada
| | - Amanda J MacFarlane
- Nutrition Research Division, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa ON, Canada
| | - Jacquetta M Trasler
- Child Health and Human Development Program (CHHD), Research Institute of the McGill University Health Centre, 1001 Décarie Boulevard, Montréal QC, Canada.,Department of Human Genetics, McGill University, 3640 rue University, Montréal QC, Canada.,Department of Pharmacology and Therapeutics, McGill University, 3655 Promenade Sir William Osler, Montréal QC, Canada.,Department of Pediatrics, McGill University, 1001 Décarie Boulevard, Montréal QC, Canada
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Ruddock-hudson M, Ruddock S, Rahimi S. Blowing the whistle on mental health and wellbeing: The experiences of Australian Football League Umpires. J Sci Med Sport 2019. [DOI: 10.1016/j.jsams.2019.08.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Howells J, Khoury E, Hack J, Yeoh C, Rahimi S. Expression of MMR in women high grade carcinoma of unknown primary. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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9
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Talghari M, Rahimi S, Karimi Torshizi M, Mozafari A. PSXV-33 The effect of dietary sodium bisulfate and Monensin on growth performance of experimental Emeria inoculated broiler chickens. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M Talghari
- Department of Poultry Science, Tarbiat Modares University,Tehran, Iran
| | - S Rahimi
- Tarbiat Modares University,Tehran, Iran
| | - M Karimi Torshizi
- Department of Poultry Science, Tarbiat Modares University,Tehran, Iran
| | - A Mozafari
- Department of Poultry Science, Tarbiat Modares University,Tehran, Iran
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10
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Yakhkeshi S, Rahimi S, Sharafi M, Hassani S, Shahverdi G, Baharvand H. PSVII-19 Characterization and Migration of Cultured Quail Primordial Germ Cells from Embryonic Blood and Gonad. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Yakhkeshi
- Department of Poultry Science, Tarbiat Modaryes University,Tehran, Iran
| | - S Rahimi
- Tarbiat Modares University,Tehran, Iran
| | - M Sharafi
- Department of Poultry Science, Tarbiat Modaryes University,Tehran, Iran
| | - S Hassani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology,ACECR, Tehran, Iran
| | - G Shahverdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine,ACECR, Tehran, Iran
| | - H Baharvand
- Department of Developmental Biology, University of Science and Culture,ACECR, Tehran, Iran
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Feyzi S, Sharafi M, Rahimi S. Stress preconditioning of rooster semen before cryopreservation improves fertility potential of thawed sperm. Poult Sci 2018; 97:2582-2590. [DOI: 10.3382/ps/pey067] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 02/07/2018] [Indexed: 12/16/2022] Open
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Whidden L, Martel J, Rahimi S, Chaillet JR, Chan D, Trasler JM. Compromised oocyte quality and assisted reproduction contribute to sex-specific effects on offspring outcomes and epigenetic patterning. Hum Mol Genet 2018; 25:4649-4660. [PMID: 28173052 DOI: 10.1093/hmg/ddw293] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/04/2016] [Accepted: 08/25/2016] [Indexed: 11/13/2022] Open
Abstract
Clinical studies have revealed an increased incidence of growth and genomic imprinting disorders in children conceived using assisted reproductive technologies (ARTs), and aberrant DNA methylation has been implicated. We propose that compromised oocyte quality associated with female infertility may make embryos more susceptible to the induction of epigenetic defects by ART. DNA methylation patterns in the preimplantation embryo are dependent on the oocyte-specific DNA methyltransferase 1o (DNMT1o), levels of which are decreased in mature oocytes of aging females. Here, we assessed the effects of maternal deficiency in DNMT1o (Dnmt1Δ1o/+) in combination with superovulation and embryo transfer on offspring DNA methylation and development. We demonstrated a significant increase in the rates of morphological abnormalities in offspring collected from Dnmt1Δ1o/+ females only when combined with ART. Together, maternal oocyte DNMT1o deficiency and ART resulted in an accentuation of placental imprinting defects and the induction of genome-wide DNA methylation alterations, which were exacerbated in the placenta compared to the embryo. Significant sex-specific trends were also apparent, with a preponderance of DNA hypomethylation in females. Among genic regions affected, a significant enrichment for neurodevelopmental pathways was observed. Taken together, our results demonstrate that oocyte DNMT1o-deficiency exacerbates genome-wide DNA methylation abnormalities induced by ART in a sex-specific manner and plays a role in mediating poor embryonic outcome.
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Affiliation(s)
- Laura Whidden
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
| | - Josée Martel
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Sophia Rahimi
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - J Richard Chaillet
- Department of OB/GYN and Reproductive Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Donovan Chan
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Jacquetta M Trasler
- Montreal Children's Hospital and Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada,Department of Human Genetics, McGill University, Montreal, QC, Canada,Department of Pediatrics, McGill University, Montreal, QC, Canada
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Myagmarjav D, Sukweenadhi J, Kim YJ, Jang MG, Rahimi S, Silva J, Choi JY, Mohanan P, Kwon WS, Kim CG, Yang DC. Molecular characterization and expression analysis of pathogenesis related protein 6 from Panax ginseng. RUSS J GENET+ 2017. [DOI: 10.1134/s1022795417110060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mohammadzadeh S, Rahimi S, Ebrahimi-Rad M, Ofoghi H, Ehsani P. Transient expression of virus-like particles in plants: a promising platform for rapid vaccine production. vacres 2017. [DOI: 10.29252/vacres.4.3.4.72] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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15
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Green B, Rahimi S, Brennan PA. Salivary gland malignancies - an update on current management for oral healthcare practitioners. Oral Dis 2016; 22:735-739. [DOI: 10.1111/odi.12498] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 04/27/2016] [Indexed: 12/01/2022]
Affiliation(s)
- B Green
- Department of Gastroenterology; Torbay Hospital; Torquay UK
| | - S Rahimi
- Department of Histopathology; Queen Alexandra Hospital; Portsmouth UK
| | - PA Brennan
- Oral and Maxillofacial Surgery; Queen Alexandra Hospital; Portsmouth UK
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Bertinato J, Lavergne C, Rahimi S, Rachid H, Vu NA, Plouffe LJ, Swist E. Moderately Low Magnesium Intake Impairs Growth of Lean Body Mass in Obese-Prone and Obese-Resistant Rats Fed a High-Energy Diet. Nutrients 2016; 8:nu8050253. [PMID: 27136580 PMCID: PMC4882666 DOI: 10.3390/nu8050253] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 04/20/2016] [Accepted: 04/22/2016] [Indexed: 12/14/2022] Open
Abstract
The physical and biochemical changes resulting from moderately low magnesium (Mg) intake are not fully understood. Obesity and associated co-morbidities affect Mg metabolism and may exacerbate Mg deficiency and physiological effects. Male rats selectively bred for diet-induced obesity (OP, obese-prone) or resistance (OR, obese-resistant) were fed a high-fat, high-energy diet containing moderately low (LMg, 0.116 ± 0.001 g/kg) or normal (NMg, 0.516 ± 0.007 g/kg) Mg for 13 weeks. The growth, body composition, mineral homeostasis, bone development, and glucose metabolism of the rats were examined. OP and OR rats showed differences (p < 0.05) in many physical and biochemical measures regardless of diet. OP and OR rats fed the LMg diet had decreased body weight, lean body mass, decreased femoral size (width, weight, and volume), and serum Mg and potassium concentrations compared to rats fed the NMg diet. The LMg diet increased serum calcium (Ca) concentration in both rat strains with a concomitant decrease in serum parathyroid hormone concentration only in the OR strain. In the femur, Mg concentration was reduced, whereas concentrations of Ca and sodium were increased in both strains fed the LMg diet. Plasma glucose and insulin concentrations in an oral glucose tolerance test were similar in rats fed the LMg or NMg diets. These results show that a moderately low Mg diet impairs the growth of lean body mass and alters femoral geometry and mineral metabolism in OP and OR rats fed a high-energy diet.
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Affiliation(s)
- Jesse Bertinato
- Nutrition Research Division, Health Products and Food Branch, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada.
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada.
| | - Christopher Lavergne
- Nutrition Research Division, Health Products and Food Branch, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada.
- Department of Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada.
| | - Sophia Rahimi
- Nutrition Research Division, Health Products and Food Branch, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada.
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada.
| | - Hiba Rachid
- Nutrition Research Division, Health Products and Food Branch, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada.
- Food Science and Nutrition Program, Carleton University, Ottawa, ON K1S 5B6, Canada.
| | - Nina A Vu
- Nutrition Research Division, Health Products and Food Branch, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada.
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada.
| | - Louise J Plouffe
- Nutrition Research Division, Health Products and Food Branch, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada.
| | - Eleonora Swist
- Nutrition Research Division, Health Products and Food Branch, Health Canada, Sir Frederick G. Banting Research Centre, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, Canada.
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Na SR, Rahimi S, Tao L, Chou H, Ameri SK, Akinwande D, Liechti KM. Clean graphene interfaces by selective dry transfer for large area silicon integration. Nanoscale 2016; 8:7523-7533. [PMID: 26902897 DOI: 10.1039/c5nr06637a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Here we present a very fast, selective mechanical approach for transferring graphene with low levels of copper contamination from seed wafers on which it was grown to target wafers for very large scale integration (VLSI) electronics. We found that graphene/copper or copper/silicon oxide delamination paths could be selected by slow and faster separation rates, respectively. Thus graphene can be transferred to a target wafer, either exposed or protected by the seed copper layer, which can later be removed by etching. Delamination paths were identified by SEM and Raman spectroscopy. The sheet resistance of the graphene produced by the two approaches was slightly higher than graphene transferred by a PMMA wet-transfer process, indicating reduced impurity doping, and the variation in the sheet resistance values was much lower. Copper contamination levels, quantitatively established by TOF-SIMS, were several orders of magnitude lower than the values for PMMA assisted transfer. In addition, we demonstrated that top-gated transistor devices from our mechanical, delamination transferred graphene exhibited superior transistor behavior to PMMA-assisted wet transfer graphene. The adhesion energy, strength and range of the interactions were quantitatively determined by nonlinear fracture analyses, and suggest that the roughness of the interface between graphene and copper plays an important role with implications for improvements in manufacturing processes.
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Affiliation(s)
- S R Na
- Department of Aerospace Engineering and Engineering Mechanics, Research Center for the Mechanics of Solids, Structures and Materials, The University of Texas at Austin, Austin, Texas 78712, USA.
| | - S Rahimi
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - L Tao
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - H Chou
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - S K Ameri
- Department of Aerospace Engineering and Engineering Mechanics, Research Center for the Mechanics of Solids, Structures and Materials, The University of Texas at Austin, Austin, Texas 78712, USA. and Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - D Akinwande
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - K M Liechti
- Department of Aerospace Engineering and Engineering Mechanics, Research Center for the Mechanics of Solids, Structures and Materials, The University of Texas at Austin, Austin, Texas 78712, USA.
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Kamely M, Torshizi MAK, Rahimi S, Wideman RF. Caffeine causes pulmonary hypertension syndrome (ascites) in broilers. J Anim Sci 2016; 94:1493-500. [DOI: 10.2527/jas.2015-0152] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Mirdehghan SH, Rahimi S. Pre-harvest application of polyamines enhances antioxidants and table grape (Vitis vinifera L.) quality during postharvest period. Food Chem 2015; 196:1040-7. [PMID: 26593587 DOI: 10.1016/j.foodchem.2015.10.038] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 10/10/2015] [Accepted: 10/10/2015] [Indexed: 11/26/2022]
Abstract
Pre-harvest foliar spraying of grapevines with putrescine (Put) and spermidine (Spd) (0, 1, 2mM) was evaluated for determining the fruit quality at harvest and improving postharvest characteristics of table grapes during cold storage. Fruit parameters in terms of firmness, fungal infection, weight loss, total phenol concentration, antioxidant activity, skin color, total anthocyanin concentration, total soluble solids (TSS) and titratable acidity (TA) were evaluated after 0, 25 and 55 days of storage at 1.5 ± 1 °C and 90 ± 5% R.H. Softening, fungal infection and weight loss increased during cold storage but the rate of changes significantly was delayed in Put- and Spd-treated fruits. Besides these, the application of Put and Spd maintained higher values of phenolics content, antioxidant activity and anthocyanins at the end of storage in compare to control. Furthermore, after 55 days of storage all treated fruits with Put and Spd showed lower changes in L(∗), TSS and TA and also higher value of chroma in berries.
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Affiliation(s)
- S H Mirdehghan
- Dep. Horticultural Sciences, College of Agriculture, Vali-e-Asr University of Rafsanjan, Kerman, Iran.
| | - S Rahimi
- Dep. Horticultural Sciences, College of Agriculture, Vali-e-Asr University of Rafsanjan, Kerman, Iran
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Rafati A, Rahimi S, Talebi A, Soleimani A, Haghani M, Mortazavi SMJ. Exposure to Radiofrequency Radiation Emitted from Common Mobile Phone Jammers Alters the Pattern of Muscle Contractions: an Animal Model Study. J Biomed Phys Eng 2015; 5:133-42. [PMID: 26396969 PMCID: PMC4576874] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Accepted: 06/12/2015] [Indexed: 06/05/2023]
Abstract
INTRODUCTION The rapid growth of wireless communication technologies has caused public concerns regarding the biological effects of electromagnetic radiations on human health. Some early reports indicated a wide variety of non-thermal effects of electromagnetic radiation on amphibians such as the alterations of the pattern of muscle extractions. This study is aimed at investigating the effects of exposure to radiofrequency (RF) radiation emitted from mobile phone jammers on the pulse height of contractions, the time interval between two subsequent contractions and the latency period of frog's isolated gastrocnemius muscle after stimulation with single square pulses of 1V (1 Hz). MATERIALS AND METHODS Frogs were kept in plastic containers in a room. Animals in the jammer group were exposed to radiofrequency (RF) radiation emitted from a common Jammer at a distance of 1m from the jammer's antenna for 2 hours while the control frogs were only sham exposed. Then animals were sacrificed and isolated gastrocnemius muscles were exposed to on/off jammer radiation for 3 subsequent 10 minute intervals. Isolated gastrocnemius muscles were attached to the force transducer with a string. Using a PowerLab device (26-T), the pattern of muscular contractions was monitored after applying single square pulses of 1V (1 Hz) as stimuli. RESULTS The findings of this study showed that the pulse height of muscle contractions could not be affected by the exposure to electromagnetic fields. However, the latency period was effectively altered in RF-exposed samples. However, none of the experiments could show an alteration in the time interval between two subsequent contractions after exposure to electromagnetic fields. CONCLUSION These findings support early reports which indicated a wide variety of non-thermal effects of electromagnetic radiation on amphibians including the effects on the pattern of muscle extractions.
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Affiliation(s)
- A. Rafati
- Physiology Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S. Rahimi
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A. Talebi
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A. Soleimani
- Department of Epidemiology, school of health, Tabriz university of medical science, Tabriz, Iran
| | - M. Haghani
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - S. M. J. Mortazavi
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
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Mortazavi SMJ, Rahimi S, Talebi A, Soleimani A, Rafati A. Survey of the Effects of Exposure to 900 MHz Radiofrequency Radiation Emitted by a GSM Mobile Phone on the Pattern of Muscle Contractions in an Animal Model. J Biomed Phys Eng 2015; 5:121-32. [PMID: 26396968 PMCID: PMC4576873] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 08/04/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND The rapid development of wireless telecommunication technologies over the past decades, has led to significant changes in the exposure of the general public to electromagnetic fields. Nowadays, people are continuously exposed to different sources of electromagnetic fields such as mobile phones, mobile base stations, cordless phones, Wi-Fi routers, and power lines. Therefore, the last decade witnessed a rapidly growing concern about the possible health effects of exposure to electromagnetic fields emitted by these sources. MATERIALS AND METHODS In this study that was aimed at investigating the effects of exposure to radiofrequency (RF) radiation emitted by a GSM mobile phone on the pattern of contraction in frog's isolated gastrocnemius muscle after stimulation with single square pulses of 1V (1 Hz), pulse height of contractions, the time interval between two subsequent contractions and the latency period were measured. RESULTS Our findings showed that the pulse height of contractions muscle could be affected by the exposure to electromagnetic fields. Especially, the latency period was effectively altered in RF-exposed samples. However, none of the experiments could show an alteration in the time interval between two subsequent contractions after exposure to electromagnetic fields. CONCLUSION These findings support early reports which indicated a wide variety of non-thermal effects of electromagnetic radiation on amphibians including the effects on the pattern of muscle extractions.
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Affiliation(s)
- S. M. J. Mortazavi
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S. Rahimi
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A. Talebi
- Medical Physics and Medical Engineering Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A. Soleimani
- Department of Epidemiology, school of health, Tabriz university of medical science, Tabriz, Iran
| | - A. Rafati
- Physiology Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Reyhani MF, Ghasemi N, Rahimi S, Milani AS, Barhaghi MH, Azadi A. Apical microleakage of AH Plus and MTA Fillapex® sealers in association with immediate and delayed post space preparation: a bacterial leakage study. Minerva Stomatol 2015; 64:129-134. [PMID: 25799446] [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: 06/04/2023]
Abstract
AIM The aim of the present study was to compare the apical microleakage of root canals obturated with AH Plus and MTA Fillapex® sealers. METHODS A total of 76 anterior teeth were randomly divided into 4 groups (N.=15) and in each group 2 positive and 2 negative control teeth. All the teeth were cleaned, shaped and obturated using lateral compaction technique with gutta-percha and AH Plus® sealer in groups 1 and 2 and MTA Fillapex® sealer in groups 3 and 4. In groups 1 and 3 post spaces were prepared immediately and groups 2 and 4 were stored for 1 week at 100% relative humidity and then post spaces were prepared. The teeth were connected to a bacterial microleakage evaluation system. Each 72 hours, E. faecalis bacteria were inoculated into the coronal thirds of the root canals. The study period was 90 days and the samples were evaluated on a daily basis, Meier-Kaplan technique was used for estimation of the mean time of microleakage to occur. Log-rank test was used for comparison of microleakage. RESULTS Contamination occurred in positive control groups on the first day of bacterial inoculation; however, the negative control groups did not exhibit any contamination up to the end of 90-day study period. the difference was not statistically significant between two materials (P>0.05). CONCLUSION There were no significant differences between AH Plus® and MTA Fillapex® sealers with the two immediate and delayed postspace preparation techniques.
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Affiliation(s)
- M F Reyhani
- Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran -
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Mortazavi SMJ, Rahimi S, Mosleh-Shirazi MA, Arjomandi M, Soleimani A, Koohi Hossein-abadi O, Haghani M, Alavi M. A Comparative Study on the Life-Saving Radioprotective Effects of Vitamins A, E, C and Over-the-Counter Multivitamins. J Biomed Phys Eng 2015; 5:59-66. [PMID: 26157731 PMCID: PMC4479387] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 02/23/2015] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Oral intake of vitamins which present antioxidant characteristics can protect living organisms against oxidative damage caused by exposure to ionizing radiation. It was previously reported that administration of high levels of vitamin C can lead to increased DNA damage through production of hydroxyl radicals from hydrogen peroxide by the Fenton reaction. However, our early experiments did not confirm this hypothesis. The main goal of this study was to determine if high doses of Vit C can show life-saving radioprotective effects. MATERIALS AND METHODS Phase I: Seventy two male Balb/c mice weighing 20-25g were randomly divided into six groups of 12 animals each. Group I; Vit E for five days, Groups II and III; Vit C and Vit A. Group 4; all three vitamins. Group V; an over-the-counter multivitamin. Group VI; none of the above. Phase II: 120 male BALB/c mice weighing 20-25g were randomly divided into 12 groups of 10 each. Group I; Vit A for five days. Groups II-IV; Vit C 200 mg/kg, 400 mg/kg, 800 mg/kg, respectively. Group V-VII; Vit E at daily doses of 200 iu/kg, 400 iu/kg, 800 iu/kg, respectively. Group VIII and IX; all three vitamins at low and high doses, respectively. Group X; an over-the-counter multivitamin. Group XI; controls group and Group XII; received pure olive oil. All animals (Phases I and II) were exposed to a lethal dose of gamma rays and the survival rates of the animals were monitored and recorded continuously for 16 days after exposure. RESULTS Phase I: 14 days after irradiation the survival rate for control group was 33.33%, while the survival rates for the 1st to 5th groups were 45.45%, 81.81%, 50%, 57.14%, and 9.09% , respectively. Phase II: The survival rates in the control group and the group that only received pure olive oil, were 50% and 60%, respectively. Survival rate in the animals received Vit C at daily doses of 200 mg/kg, 400 mg/kg, 800 mg/kg, were 90%, 90% and 90%, respectively. Log rank (Mantel-Cox) test showed statistically significant differences between the survival rates in control irradiated mice (no vitamins) and mice received Vit C at daily doses of 200 mg/kg (P=0.042), 400 mg/kg (P=0.042) and 800 mg/kg (P=0.042). CONCLUSION Altogether, findings of this study showed that even high doses of Vit C can show life-saving radioprotective effects. The significant radioprotective effect of Vit C at doses used in this study, opens new horizons in developing non-toxic, cost effective, easily available radioprotectors in life-threatening situations such as exposure to lethal doses of ionizing radiation. The radioprotective effect of Vit A and Vit E seem to be less efficient compared to that of Vit C.
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Affiliation(s)
- S. M. J. Mortazavi
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
,Professor of Medical Physics, Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - S. Rahimi
- Master Student of Medical Physics, Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M. A. Mosleh-Shirazi
- Head of Radiotherapy Physics Department, Assistant Professor of Medical Physics, Namazi Teaching Hospital, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M. Arjomandi
- Radiologic Technology Student, Radiology Department, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A. Soleimani
- Ph.D Student of Epidemiology, Epidemiology Department, School of Public Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - O. Koohi Hossein-abadi
- Center of comparative and experimental medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M. Haghani
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - M. Alavi
- Ionizing and Non-ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
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Gordanian E, Jalali-Asadabadi S, Ahmad I, Rahimi S, Yazdani-Kachoei M. Effects of dangling bonds and diameter on the electronic and optical properties of InAs nanowires. RSC Adv 2015. [DOI: 10.1039/c4ra13168a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this article we explore the effects of dangling bonds and diameter on the electronic properties of the wurtzite InAs nanowires (NWs) using the density functional theory.
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Affiliation(s)
- E. Gordanian
- Department of Physics
- Faculty of Science
- University of Isfahan (UI)
- Isfahan 81746-73441
- Iran
| | - S. Jalali-Asadabadi
- Department of Physics
- Faculty of Science
- University of Isfahan (UI)
- Isfahan 81746-73441
- Iran
| | - Iftikhar Ahmad
- Center for Computational Materials Science
- University of Malakand
- Chakdara
- Pakistan
- Department of Physics
| | - S. Rahimi
- Department of Physics
- Faculty of Science
- University of Isfahan (UI)
- Isfahan 81746-73441
- Iran
| | - M. Yazdani-Kachoei
- Department of Physics
- Faculty of Science
- University of Isfahan (UI)
- Isfahan 81746-73441
- Iran
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Barr R, Desrosiers L, Rahimi S, Fenske S, Ascher-Walsh C. Paracervical Block of Bupivacaine with Epinephrine Prior to Robotic-Assisted Laparoscopic Myomectomy: A Randomized Placebo-Controlled Trial. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2014.08.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
Cutaneous squamous cell carcinoma (SCC) is the second most common skin cancer in Caucasians, most frequently occurring on sun-exposed areas of the body. Most SCCs are treated surgically, either by excision or Mohs micrographic surgery. Despite the large amount of English literature with regard to cutaneous SCC in many instances the surgical treatment is not appropriate resulting in recurrences and/ or metastasis. The following brief review highlights the histology, molecular biology and surgical treatment of skin SCC.
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Affiliation(s)
- S Rahimi
- Consultant Histopathologist, Pathology Centre, Queen Alexandra Hospital, Southwick Hill Road, Cosham, Portsmouth PO6 3LY, UK.
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Jeppson P, Rahimi S, Gattoc L, Westermann L, Cichowski S, Raker C, LeBrun EEW, Sung V. Impact of Robotic Technology on Hysterectomy Route and Associated Implications for Resident Education. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2013.12.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Moussavi S, Ehrampoush M, Mahvi A, Rahimi S, Ahmadian M. Efficiency of Multi-Walled Carbon Nanotubes in Adsorbing Humic Acid from Aqueous Solutions. ACTA ACUST UNITED AC 2014. [DOI: 10.14233/ajchem.2014.15609] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Varmaghany S, Rahimi S, Karimi Torshizi M, Lotfollahian H, Hassanzadeh M. Effect of olive leaves on ascites incidence, hematological parameters and growth performance in broilers reared under standard and cold temperature conditions. Anim Feed Sci Technol 2013. [DOI: 10.1016/j.anifeedsci.2013.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Moussavi S, Ehrampoush M, Mahvi A, Ahmadian M, Rahimi S. Adsorption of Humic Acid from Aqueous Solution on Single-Walled Carbon Nanotubes. ACTA ACUST UNITED AC 2013. [DOI: 10.14233/ajchem.2013.14173] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Shahi S, Mokhtari H, Rahimi S, Shiezadeh V, Ashasi H, Abdolrahimi M, Foroughreyhani M. Electrochemical corrosion assessment of RaCe and Mtwo rotary nickle-titanium instruments after clinical use and sterilization. Med Oral Patol Oral Cir Bucal 2012; 17:e331-6. [PMID: 22143690 PMCID: PMC3464121 DOI: 10.4317/medoral.17413] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Accepted: 09/22/2011] [Indexed: 11/06/2022] Open
Abstract
Aim: The aim of the present study was to electrochemically evaluate corrosion resistance of RaCe and Mtwo files after repeated sterilization and preparation procedures.
Study Design: A total of 450 rotary files were used. In the working groups, 72 files from each file type were distributed into 4 groups. RaCe and Mtwo files were used to prepare one root canal of the mesial root of extracted human mandibular first molars. The procedure was repeated to prepare 2 to 8 canals. The following irrigation solutions were used: group 1, RaCe files with 2.5% NaOCl; group 2, RaCe files with normal saline; group 3, Mtwo files with 2.5% NaOCl; and group 4, Mtwo files with normal saline in the manner described. In autoclave groups, 72 files from each file type were evenly distributed into 2 groups. Files were used for a cycle of sterilization without the use of files for root canal preparation. Nine new unused files from each file type were used as controls. Then the instruments were sent for corrosion assessment. Mann-Whitney U and Wilcoxon tests were used for independent and dependent groups, respectively.
Results: Statistical analysis indicated that there were significant differences in corrosion resistance of files associated with working and autoclave groups between RaCe and Mtwo file types (p<0.001).
Conclusions: Corrosion resistance of #25, #30, and #35 Mtwo files is significantly higher than that in RaCe files with similar sizes.
Key words:Corrosion, NiTi instruments, autoclave, RaCe, Mtwo.
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Affiliation(s)
- S Shahi
- Department of Endodontics, Faculty of Dentistry, Golgasht Street, 5166614713, Tabriz, Iran
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Rahimi S, Kathariou S, Grimes J, Siletzky R. Effect of direct-fed microbials on performance and Clostridium perfringens colonization of turkey poults. Poult Sci 2011; 90:2656-62. [DOI: 10.3382/ps.2011-01342] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Hosseini A, Rahimi S, Xu X, Kwong D, Covey J, Chen RT. Ultracompact and fabrication-tolerant integrated polarization splitter. Opt Lett 2011; 36:4047-4049. [PMID: 22002381 DOI: 10.1364/ol.36.004047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Design and fabrication of a 2×2 two-mode interference (TMI) coupler based on-chip polarization splitter is presented. By changing the angle between the access waveguides, one can tune the effective TMI length for the mode with less optical confinement (transverse magnetic, TM) to coincide with the target TMI length for a desired transmission of the mode with higher optical confinement (transverse electric, TE). The fabricated 0.94 μm long 2×2 TMI splits the input power into TM (bar) and TE (cross) outputs with splitting ratio over 15 dB over 50 nm bandwidth. Fabrication tolerance analysis shows that the device is tolerant to fabrication errors as large as 60 nm.
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Affiliation(s)
- A Hosseini
- Microelectronic Research Center, Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, TX 78758, USA.
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Nezafati S, Rahimi S, Mohseni H. Temporary eyelash loss following dental treatment. Int J Oral Maxillofac Surg 2010; 39:1142-4. [PMID: 20598856 DOI: 10.1016/j.ijom.2010.04.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 02/17/2010] [Accepted: 04/27/2010] [Indexed: 11/27/2022]
Abstract
The isolated absence or loss of eyelashes (madarosis) is associated with many processes including systemic and local diseases. Madarosis of dental origin has not been reported. This paper is a report of the successful treatment of unilateral eyelash loss following root canal therapy of an upper posterior tooth.
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Affiliation(s)
- S Nezafati
- Oral and Maxillofacial Surgery, Emam Reza Hospital, Tabriz University of Medical Sciences, Tabriz, Iran.
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Jafarian M, Rahimi S, Behnam F, Hosseini M, Haghir H, Sadeghzadeh B, Gorji A. The effect of repetitive spreading depression on neuronal damage in juvenile rat brain. Neuroscience 2010; 169:388-94. [PMID: 20438812 DOI: 10.1016/j.neuroscience.2010.04.062] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 04/20/2010] [Accepted: 04/25/2010] [Indexed: 10/19/2022]
Abstract
Spreading depression (SD) is pronounced depolarization of neurons and glia that travels slowly across brain tissue followed by massive redistribution of ions between intra- and extracellular compartments. There is a relationship between SD and some neurological disorders. In the present study the effects of repetitive SD on neuronal damage in cortical and subcortical regions of juvenile rat brain were investigated. The animals were anesthetized and the electrodes as well as cannula were implanted over the brain. SD-like event was induced by KCl injection. The brains were removed after 2 or 4 weeks after induction of 2 or 4 SD-like waves (with interval of 1 week), respectively. Normal saline was injected instead of KCl in sham group. For stereological study, paraffin-embedded brains were cut in 5 microm sections. The sections were stained with Toluidine Blue to measure the volume-weighted mean volume of normal neurons and the numerical density of dark neurons. The volume-weighted mean volume of normal neurons in the granular layer of the dentate gyrus and layer V of the temporal cortex in SD group were significantly decreased after four repetitive SD. Furthermore, densities of dark neurons in the granular layer of the dentate gyrus (after 2 weeks), the caudate-putamen, and layer V of the temporal cortex (after 4 weeks) were significantly increased in SD group. Repetitive cortical SD in juvenile rats may cause neuronal damage in cortical and subcortical areas of the brain. This may important in pathophysiology of SD-related neurological disorders.
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Affiliation(s)
- M Jafarian
- Department of Anatomy, Mashhad University of Medical Sciences, Mashhad, Iran; Shefa Neuroscience Center, Tehran, Iran
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36
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Rahimi S, Shahi S, Kimyai S, Khayyam L, Abdolrahimi M. Effect of calcium hydroxide dressing on microleakage of composite restorations in endodontically treated teeth subsequent to bleaching. Med Oral Patol Oral Cir Bucal 2010; 15:e413-6. [DOI: 10.4317/medoral.15.e413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Accepted: 08/19/2009] [Indexed: 11/05/2022] Open
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Abdolrahimzadeh S, Garzione F, Cruciani F, Rahimi S. Incidental finding of double nodular microscopic hyperplasia versus adenoma of the retinal pigment epithelium in an eye eviscerated for phthisis bulbi. Clin Ter 2010; 161:449-451. [PMID: 20949242] [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: 05/30/2023]
Abstract
Neoplasms of the retinal pigment epithelium (RPE) are very rare and can clinically simulate choroidal melanoma. The clinical, histopathological and immunohistochemical features of incidental double pseudo-neoplastic proliferation of the RPE in an eviscerated eye for phthisis bulbi are reported. The differential diagnosis of RPE neoplasms and the utility of histopatological examination of eviscerated/enucleated eyes are discussed.
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Malvasi A, Tinelli A, Tinelli R, Rahimi S, Resta L, Tinelli FG. The post-cesarean section symptomatic bladder flap hematoma: A modern reappraisal. J Matern Fetal Neonatal Med 2009; 20:709-14. [PMID: 17763270 DOI: 10.1080/01674820701450573] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The bladder-flap hematoma (BFH) is an unusual complication of the cesarean section (CS) performed by Misgaw Ladach method or Stark CS (performed without peritoneal closure) and it is an usual event after the visceral peritoneal closure performed during the traditional method. A BFH is generally thought of as a blood collection located in a space placed between the bladder and lower uterine segment (LUS), called vescico-uterine space. If, during a Stark CS, pathological fluid collections arise in this space by uterine suture bleeding, these decant into the large peritoneal cavity causing a hemoperitoneum. This last complication can be easily and accurately detectable by ultrasonography, which can be utilised by non-invasive monitoring as a guide for the clinical follow-up. In the authors' experience, the CS by Stark method is associated with a lower febrile and infective morbidity and it is possible also to perform a successful conservative laparoscopy for the BFH management. Laparoscopical treatment of BFH offers to patients the potential clinical benefits of the minimally invasive endoscopical treatments, but it should be reserved for surgeons trained in extensive laparoscopic procedures.
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Affiliation(s)
- A Malvasi
- Department of Obstetrics and Gynaecology, Santa Maria Hospital, Bari, Italy.
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Pour SJ, Jamshidi M, Abedi F, Karmostaji A, Rahimi S, Eftekhaari T, Jahed M, Moradi N, Wahdani M. P55 Antibiotic susceptibility in bacteria isolated from hospitalized and outpatients with urinary tract infection. Int J Antimicrob Agents 2009. [DOI: 10.1016/s0924-8579(09)70274-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rahimi S, Grimes J, Fletcher O, Oviedo E, Sheldon B. Effect of a direct-fed microbial (Primalac) on structure and ultrastructure of small intestine in turkey poults. Poult Sci 2009; 88:491-503. [DOI: 10.3382/ps.2008-00272] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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41
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Jamal-Omidi S, Hashemi S, Mamani M, Keramat F, Niayesh A, Rahimi S. Nosocomial Bacterial Infections and Their Antimicrobial Resistance Patterns in University Hospitals of Hamadan, Iran. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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42
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Grimes JL, Rahimi S, Oviedo E, Sheldon BW, Santos FBO. Effects of a direct-fed microbial (primalac) on turkey poult performance and susceptibility to oral Salmonella challenge. Poult Sci 2008; 87:1464-70. [PMID: 18577631 DOI: 10.3382/ps.2008-00498] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A study was conducted to determine 1) the effect of a dietary direct-fed microbial (DFM) on turkey poult performance, 2) the effect of a DFM on a Salmonella challenge, and 3) the effect of feed processing on the efficacy of the dietary DFM. Day-of-hatch Large White female poults were placed in 2 rooms in 2 Petersime batteries per room. Twelve pens of 7 birds each were used in each battery (24 pens per room, 336 birds total). One of 4 dietary feed treatments was assigned to each pen (6 pens per room for each diet). One room housed non-Salmonella-challenged poults, and the other room housed poults challenged with a 1-mL oral gavage of Salmonella (10(10) cfu/mL). A single batch of starter ration was split into 4 parts and used to provide 4 dietary treatments: 1) mash feed with no DFM (M), 2) mash feed with DFM (Primalac; 0.9 kg/tonne of feed, MD), 3) pelleted (20-s steam conditioning at 80 degrees C) and crumbled feed with no DFM (C), and 4) pelleted and crumbled feed with DFM (CD). Feed and deionized, distilled water were provided ad libitum. Data were collected and analyzed separately for each room. Mortality was recorded for each pen on a daily basis and totaled by week and for the 3-wk period. Individual BW and feed consumption, by pen, were measured weekly. Weekly and cumulative BW gains and feed to gain ratios (F:G) were calculated. Liver, spleen, total and lower intestinal tract weights, intestinal length, and most-probable-number Salmonella populations were determined for one randomly selected bird per pen. Feeding processed feed resulted in improved BW and F:G. Feeding the DFM improved 3-wk cumulative F:G in birds not gavaged and reduced relative intestinal weight in birds gavaged. Salmonella populations were reduced 1 log by feeding DFM. Dietary DFM improved bird performance, reduced Salmonella populations, and was not affected by feed processing.
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Affiliation(s)
- J L Grimes
- Department of Poultry Science, College of Agriculture and Life Sciences, North Carolina State University, Raleigh NC 27695, USA.
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Vigili M, Mancini G, Mafera B, Celebrini A, Tartaglione G, Rahimi S. O.297 Sentinel node biopsy in oral cavity SCC: our experience. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)71421-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Haider S, Todd C, Ahmadzai M, Rahimi S, Azfar P, Morris J, Miller S. Childbearing and contraceptive decision making among Afghan men and women: a qualitative analysis. Contraception 2008. [DOI: 10.1016/j.contraception.2008.04.073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Marani C, Alvino E, Caporali S, Vigili MG, Mancini G, Rahimi S. DNA mismatch repair protein expression and microsatellite instability in primary mucosal melanomas of the head and neck. Histopathology 2007; 50:780-8. [PMID: 17493242 DOI: 10.1111/j.1365-2559.2007.02683.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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: 01/03/2023]
Abstract
AIMS To examine the expression of DNA mismatch repair (MMR) proteins and the presence of microsatellite instability (MSI) in seven primary mucosal melanomas of the head and neck (MMHN). METHODS AND RESULTS Haematoxylin and eosin staining and immunohistochemical analysis for routine diagnostic markers and for MMR proteins were performed. Six cases were examined for MSI. Four cases were monomorphous and three cases were pleomorphic type MMHN. Melanocytic markers were positive in all cases. Immunoreactivity for MMR proteins was weak in normal epithelium. The neoplastic tissue in six cases showed positivity for all MMR proteins with different percentages. One case showed weak positivity for hMSH2 and hMSH6 and no immunoreactivity for hMLH1 or hPMS2. Staining intensity was higher in tumour cells than in matched normal mucosa in three cases for hMSH2 and hMLH1 and in two cases for hPMS2. None of the examined cases showed MSI. CONCLUSIONS Expression of hMSH2 and hMLH1 proteins was up-regulated in three cases, whereas in two cases that of hPMS2 was increased. hMSH6 expression was comparable to that of normal cells in all cases. The percentage of positive neoplastic cells and the intensity of staining seemed to be greater in pleomorphic melanomas. Six cases were MMR-proficient and microsatellite stable.
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Affiliation(s)
- C Marani
- Department of Pathology, Ospedale San Carlo-IDI IRCCS, Via Aurelia 275, 00165 Rome, Italy
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Abstract
The aim of this study was to report a case of primary lymphoepitheliomalike endometrial carcinoma (FIGO stage IB). A 57-year-old woman presented with an endometrial tumor showing the classic clinical and hysteroscopic aspects of endometrial carcinoma. Morphologically, the neoplasm was similar to undifferentiated nasopharyngeal carcinoma (lymphoepithelioma). Immunohistochemistry showed that the tumor cells were cyokeratins and epithelial membrane antigen positive. Leucocyte common antigen, estrogen and progesterone receptors, neuron specific enolase, cromogranin, synaptophysin, and p53 were negative. We did not find evidence of Epstein–Barr virus (EBV) infection using immunohistochemistry and polymerase chain reaction (PCR). We report the third case of an endometrial lymphoepitheliomalike carcinoma (LELC). The patient did not receive chemotherapy and is alive and free of disease 24 month after diagnosis. LELC can occur in the endometrium and in this location may not be associated with EBV infection
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Affiliation(s)
- S Rahimi
- Department of Pathology, Ospedale San Carlo-IDI IRCCS, Rome, Italy.
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Zeloni R, Votano S, Vittori G, Bassani A, Rahimi S, Lena A, Camilli F. 211. J Minim Invasive Gynecol 2005. [DOI: 10.1016/j.jmig.2005.07.210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Venuti A, Badaracco G, Rizzo C, Mafera B, Rahimi S, Vigili M. Presence of HPV in head and neck tumours: high prevalence in tonsillar localization. J Exp Clin Cancer Res 2004; 23:561-6. [PMID: 15743024] [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: 05/02/2023]
Abstract
Human papillomavirus (HPV) seems to be involved in head and neck carcinogenesis. To investigate this association, viral presence and expression were analysed by polymerase chain reaction (PCR)-based methods and correlated to tumour localization, clinical-pathological aspects, and alcohol and tobacco exposure in 65 patients. HPV DNA was found in 16 cases (24.6%); the HPV types detected were: HPV16 (10 cases), HPV 6 (3 cases) HPV 33, 35, and 58 (one case each). The tonsil was the location with the highest HPV positivity (6/8, 75%). This percentage was significantly higher than that found in tumours from any other site (P<0.01). Viral transcripts of early regions were detected in all HPV16 positive tumours. HPV status was not related to age, gender, tumour stage or grade, and use of alcohol and/or tobacco. The results suggest that HPV16 is actively involved in the genesis of a subset of head and neck cancers and that the tonsillar localization may be considered a hot spot for viral transformation.
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Affiliation(s)
- A Venuti
- Laboratory of Virology, Regina Elena Cancer Institute, San Carlo, IDI IRCCS, Rome, Italy.
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Khajavi M, Rahimi S, Hassan ZM, Kamali MA, Mousavi T. Effect of feed restriction early in life on humoral and cellular immunity of two commercial broiler strains under heat stress conditions. Br Poult Sci 2003; 44:490-7. [PMID: 12964634 DOI: 10.1080/000071660310001598328] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
1. An experiment was carried out to evaluate the effect of early feed restriction (FR) on immunocompetence of Ross and Arian chickens with separated sexes under heat stress (HS) conditions. 2. Chickens consumed feed ad libitum (AL) or were restricted on alternate days from 11 to 20 d of age. From 35 to 41 d of age, the HS groups were exposed to a high ambient temperature of 39 +/- 1 degreesC for 7 h each day, while the thermoneutral groups (TN) were at 33 degrees C. 3. At 21 and 42d of age, the percentage of CD4+ (helper T cells) and CD8+ (cytotoxic T cells) were determined by flow cytometry. Antibody response to sheep red blood cells (SRBC) and heterophil/lymphocyte (H/L) ratio were determined on d 21 and 42. 4. On d 21, FR elevated the CD4+, antibody titre and H/L ratio, but it decreased the CD8+ T cells. On d 42, HS decreased CD4+, CD8+, and antibody titre, but it increased H/L ratio. Under TN conditions, FR chickens had higher CD4+ than AL chickens. On d 42, FR/HS chickens had higher CD4+ and antibody titre, but they had lower CD8+ and H/L ratio than AL/HS chickens. 5. On d 42, the TN-Ross strain had lower CD4+, but they had higher CD8+ and antibody titres than the TN-Arian strain. On d 42, the HS-Arian strain had higher antibody titres and a lower H/L ratio than the HS-Ross strain. 6. Male chickens had higher CD4+, CD8+, antibody titres and H/L ratios 25 in all treatment groups. 7. In conclusion, FR early in life reduced some of the negative effects of the heat stress on the immune system of broiler chickens when exposed to high environmental temperatures later in life.
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Affiliation(s)
- M Khajavi
- Tarbiat Modarres University, Tehran, Iran
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Moreschini G, Marzetti A, Zaccari R, Rahimi S, Vigili MG. [Laryngeal schwannoma treated with CO2 laser]. Acta Otorhinolaryngol Ital 2002; 22:164-7. [PMID: 12173288] [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: 02/26/2023]
Abstract
Neurinoma is a benign capsulate tumor originating from the Schwann cells of all nerve fibers outside the central nervous system, the sole exception being the optic and olfactory nerves. These tumors favor the head and neck district but rarely affect the larynx. This work presents the case of a 73-year-old woman treated in the emergency room for an episode of acute dispnea. The patient's case history indicated that for more than 10 years she had the sensation of a foreign body in the hypopharynx and stomatolalia. Direct hypopharyngo-laryngoscopy with a flexible fiberoptic showed a rounded submucosa neoformation 3.5 cm in diameter at the level of the left aryepiglottic fold, blocking the opening of the laryngeal vestibule. Laryngeal motility was perfectly preserved. The decision was made for prompt exeresis of the neoformation under direct microlaryngoscopy with a CO2 laser. Post-operative follow-up showed that all laryngeal functions were preserved. Three months later, the patient was still symptom-free and direct examination of the larynx showed no signs of recurrence. Histological diagnosis indicated a laryngeal schwannoma. Surgical removal is the treatment of choice and can be performed by endoscopy or through an external approach depending on the site and size of the tumor. Different external approaches have been described such as the median thyrofissure, lateral pharyngotomy and lateral thyrofissure. In the present case, although the neoformation was quite large, the decision was made to perform an endoscopy resection with CO2 laser, without resorting to a tracheotomy, reducing post-operative recovery to a minimum and preserving all laryngeal functions.
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