1
|
M A, Loubaris A, Y M, Es-Saad O, Labib S, Sbai H. Communication during covid area: The impact of creating a new communication center. Ann Med Surg (Lond) 2022; 78:103866. [PMID: 35637886 PMCID: PMC9131702 DOI: 10.1016/j.amsu.2022.103866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/20/2022] [Accepted: 05/22/2022] [Indexed: 11/28/2022] Open
Abstract
Background Since the breakout of COVID-19 pandemic, many ways have been proposed to improve the quality of communication between the medical staff patient and their families In our department of intensive care unit in tanger Morocco and due to the lack of resources we proposed to create a communication center near the hospital to keep the families updated. Objectives Explore the outcomes and the satisfaction of family members and intensive care unit physicians about the quality of communication through reception center during the restrictive measures imposed by COVID-19. Methods we have conducted a satisfaction survey with sample of 100 families and 35 members of ICU physician during the period between August and December 2021. Results We found that communications allowed families a better understanding of the clinical state of their patient, However it was inferior to the visit near bed visits, they also thought that it helps reduce the stress due to the lack of information. Physicians believed that the communication center improved the quality of care given to the patient and helped to reduce the tension with family and increased the trust link between then and family members. Conclusion The creation of reception center improved the relation between physicians and families and improved the quality care however it remains insufficient and other strategies should be considered including telecommunication and near bed visits specially in seriouslyç ill patients Since the breakout of COVID-19 pandemic, many ways have been proposed to improve the quality of communication between the medical stuff patient and their families. In our department of intensive care unit in tanger Morocco and due to the lack of resources we proposed to create a communication center neat to the hospital to keep the families updated. Our objective was to Explore the outcomes and the satisfaction of family members and IIntensive care unit physicians about the quality of communication through reception center during the restriction measures imposed by COVID-19.
Collapse
Affiliation(s)
- Aabdi M
- Intensive Care Unit, Tanger Tetouan Al Hoceima University Hospital Center, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco
- Corresponding author. Anesthesiology and Intensive Care Unit Department, Tanger Tetouan Al hoceima University Hospital Center, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco.
| | - A. Loubaris
- Intensive Care Unit, Tanger Tetouan Al Hoceima University Hospital Center, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco
| | - Motiaa Y
- Intensive Care Unit, Tanger Tetouan Al Hoceima University Hospital Center, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco
| | - O. Es-Saad
- Intensive Care Unit, Tanger Tetouan Al Hoceima University Hospital Center, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco
| | - S. Labib
- Intensive Care Unit, Tanger Tetouan Al Hoceima University Hospital Center, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco
| | - H. Sbai
- Intensive Care Unit, Tanger Tetouan Al Hoceima University Hospital Center, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco
- Simulation Center for Medical Formation, Faculty of Medicine and Pharmacy, Abdelmalek Essaâdi University, Tangier, Morocco
| |
Collapse
|
2
|
Acosta-Uribe J, Aguillón D, Cochran JN, Giraldo M, Madrigal L, Killingsworth BW, Singhal R, Labib S, Alzate D, Velilla L, Moreno S, García GP, Saldarriaga A, Piedrahita F, Hincapié L, López HE, Perumal N, Morelo L, Vallejo D, Solano JM, Reiman EM, Surace EI, Itzcovich T, Allegri R, Sánchez-Valle R, Villegas-Lanau A, White CL, Matallana D, Myers RM, Browning SR, Lopera F, Kosik KS. A neurodegenerative disease landscape of rare mutations in Colombia due to founder effects. Genome Med 2022; 14:27. [PMID: 35260199 PMCID: PMC8902761 DOI: 10.1186/s13073-022-01035-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 07/31/2021] [Accepted: 02/26/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The Colombian population, as well as those in other Latin American regions, arose from a recent tri-continental admixture among Native Americans, Spanish invaders, and enslaved Africans, all of whom passed through a population bottleneck due to widespread infectious diseases that left small isolated local settlements. As a result, the current population reflects multiple founder effects derived from diverse ancestries. METHODS We characterized the role of admixture and founder effects on the origination of the mutational landscape that led to neurodegenerative disorders under these historical circumstances. Genomes from 900 Colombian individuals with Alzheimer's disease (AD) [n = 376], frontotemporal lobar degeneration-motor neuron disease continuum (FTLD-MND) [n = 197], early-onset dementia not otherwise specified (EOD) [n = 73], and healthy participants [n = 254] were analyzed. We examined their global and local ancestry proportions and screened this cohort for deleterious variants in disease-causing and risk-conferring genes. RESULTS We identified 21 pathogenic variants in AD-FTLD related genes, and PSEN1 harbored the majority (11 pathogenic variants). Variants were identified from all three continental ancestries. TREM2 heterozygous and homozygous variants were the most common among AD risk genes (102 carriers), a point of interest because the disease risk conferred by these variants differed according to ancestry. Several gene variants that have a known association with MND in European populations had FTLD phenotypes on a Native American haplotype. Consistent with founder effects, identity by descent among carriers of the same variant was frequent. CONCLUSIONS Colombian demography with multiple mini-bottlenecks probably enhanced the detection of founder events and left a proportionally higher frequency of rare variants derived from the ancestral populations. These findings demonstrate the role of genomically defined ancestry in phenotypic disease expression, a phenotypic range of different rare mutations in the same gene, and further emphasize the importance of inclusiveness in genetic studies.
Collapse
Affiliation(s)
- Juliana Acosta-Uribe
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, CA, USA.,Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - David Aguillón
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | | | - Margarita Giraldo
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia.,Instituto Neurológico de Colombia (INDEC), Medellín, Colombia
| | - Lucía Madrigal
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Bradley W Killingsworth
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, CA, USA
| | - Rijul Singhal
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, CA, USA
| | - Sarah Labib
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, CA, USA
| | - Diana Alzate
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Lina Velilla
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Sonia Moreno
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Gloria P García
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Amanda Saldarriaga
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Francisco Piedrahita
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Liliana Hincapié
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Hugo E López
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Nithesh Perumal
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, CA, USA
| | - Leonilde Morelo
- Department of Internal Medicine, School of Medicine, Universidad del Sinú, Montería, Colombia
| | - Dionis Vallejo
- Department of Neurology, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Juan Marcos Solano
- Department of Neurology, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | | | - Ezequiel I Surace
- Laboratorio de Enfermedades Neurodegenerativas (Fleni-CONICET), Buenos Aires, Argentina
| | - Tatiana Itzcovich
- Laboratorio de Enfermedades Neurodegenerativas (Fleni-CONICET), Buenos Aires, Argentina
| | - Ricardo Allegri
- Centro de Memoria y Envejecimiento (Fleni-CONICET), Buenos Aires, Argentina
| | - Raquel Sánchez-Valle
- Alzheimer's Disease and Other Cognitive Disorders Unit, Hospital Clínic de Barcelona, IDIBAPS and University of Barcelona, Barcelona, Spain
| | - Andrés Villegas-Lanau
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia
| | - Charles L White
- Neuropathology Section, Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Diana Matallana
- Instituto de Envejecimiento, Department of Psychiatry, School of Medicine, Pontifical Xaverian University, Bogotá, Colombia.,Department of Mental Health, Hospital Universitario Santa Fe de Bogotá, Bogotá, Colombia
| | - Richard M Myers
- HudsonAlpha Institute for Biotechnology, Huntsville, AL, USA
| | - Sharon R Browning
- Department of Biostatistics, University of Washington, Seattle, WA, USA
| | - Francisco Lopera
- Grupo de Neurociencias de Antioquia, School of Medicine, Universidad de Antioquia, Medellín, Colombia.
| | - Kenneth S Kosik
- Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California, Santa Barbara, CA, USA.
| |
Collapse
|
3
|
Nicolas HA, Bertrand AT, Labib S, Mohamed-Uvaize M, Bolongo PM, Wu WY, Bilińska ZT, Bonne G, Akimenko MA, Tesson F. Protein Kinase C Alpha Cellular Distribution, Activity, and Proximity with Lamin A/C in Striated Muscle Laminopathies. Cells 2020; 9:cells9112388. [PMID: 33142761 PMCID: PMC7693451 DOI: 10.3390/cells9112388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/19/2020] [Accepted: 10/28/2020] [Indexed: 11/24/2022] Open
Abstract
Striated muscle laminopathies are cardiac and skeletal muscle conditions caused by mutations in the lamin A/C gene (LMNA). LMNA codes for the A-type lamins, which are nuclear intermediate filaments that maintain the nuclear structure and nuclear processes such as gene expression. Protein kinase C alpha (PKC-α) interacts with lamin A/C and with several lamin A/C partners involved in striated muscle laminopathies. To determine PKC-α’s involvement in muscular laminopathies, PKC-α’s localization, activation, and interactions with the A-type lamins were examined in various cell types expressing pathogenic lamin A/C mutations. The results showed aberrant nuclear PKC-α cellular distribution in mutant cells compared to WT. PKC-α activation (phos-PKC-α) was decreased or unchanged in the studied cells expressing LMNA mutations, and the activation of its downstream targets, ERK 1/2, paralleled PKC-α activation alteration. Furthermore, the phos-PKC-α-lamin A/C proximity was altered. Overall, the data showed that PKC-α localization, activation, and proximity with lamin A/C were affected by certain pathogenic LMNA mutations, suggesting PKC-α involvement in striated muscle laminopathies.
Collapse
Affiliation(s)
- Hannah A. Nicolas
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (H.A.N.); (W.Y.W.); (M.-A.A.)
| | - Anne T. Bertrand
- Sorbonne Université, Inserm, Centre de Recherche en Myologie, UMRS 974, G.H. Pitié-Salpêtrière, 75013 Paris, France; (A.T.B.); (G.B.)
| | - Sarah Labib
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (S.L.); (M.M.-U.); (P.M.B.)
| | - Musfira Mohamed-Uvaize
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (S.L.); (M.M.-U.); (P.M.B.)
| | - Pierrette M. Bolongo
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (S.L.); (M.M.-U.); (P.M.B.)
| | - Wen Yu Wu
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (H.A.N.); (W.Y.W.); (M.-A.A.)
| | - Zofia T. Bilińska
- Unit for Screening Studies in Inherited Cardiovascular Diseases, National Institute of Cardiology, 04-628 Warsaw, Poland;
| | - Gisèle Bonne
- Sorbonne Université, Inserm, Centre de Recherche en Myologie, UMRS 974, G.H. Pitié-Salpêtrière, 75013 Paris, France; (A.T.B.); (G.B.)
| | - Marie-Andrée Akimenko
- Department of Biology, Faculty of Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (H.A.N.); (W.Y.W.); (M.-A.A.)
| | - Frédérique Tesson
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada; (S.L.); (M.M.-U.); (P.M.B.)
- Correspondence: ; Tel.: +1-613-562-5800 (ext. 7370)
| |
Collapse
|
4
|
Lakhdar K, Berdai MA, Benlamkadem S, Labib S, Harandou M. Cade oil poisoning: about a case. Med Sante Trop 2019; 29:110-111. [PMID: 31031235 DOI: 10.1684/mst.2018.0843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Throughout Morocco, cade oil is used in folk medicine for many purposes, in particular for atopic dermatosis. It is also used as a wormer. Cade oil poisoning of newborns and infants thus often has an iatrogenic origin, resulting especially from the ingestion of a significant amount or from a prolonged and extensive cutaneous application. Thus, this oil, used for therapeutic purposes, is responsible for a non-negligible number of cases of poisoning, some fatal. We report a case of poisoning after cutaneous application of cade oil in a 2-month-old infant. The outcome was fatal. This report calls attention to the real possibility of this event and emphasizes the interest of preventing it by promoting information to families in Morocco.
Collapse
Affiliation(s)
- K Lakhdar
- Service de réanimation mère-enfant, CHU Hassan II, Fès, Maroc
| | - M A Berdai
- Service de réanimation mère-enfant, CHU Hassan II, Fès, Maroc
| | - S Benlamkadem
- Service de réanimation mère-enfant, CHU Hassan II, Fès, Maroc
| | - S Labib
- Service de réanimation mère-enfant, CHU Hassan II, Fès, Maroc
| | - M Harandou
- Service de réanimation mère-enfant, CHU Hassan II, Fès, Maroc
| |
Collapse
|
5
|
Labib S, Williams A, Kuo B, Yauk CL, White PA, Halappanavar S. A framework for the use of single-chemical transcriptomics data in predicting the hazards associated with complex mixtures of polycyclic aromatic hydrocarbons. Arch Toxicol 2016; 91:2599-2616. [PMID: 27858113 PMCID: PMC5489644 DOI: 10.1007/s00204-016-1891-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 08/05/2016] [Accepted: 11/07/2016] [Indexed: 01/22/2023]
Abstract
The assumption of additivity applied in the risk assessment of environmental mixtures containing carcinogenic polycyclic aromatic hydrocarbons (PAHs) was investigated using transcriptomics. MutaTMMouse were gavaged for 28 days with three doses of eight individual PAHs, two defined mixtures of PAHs, or coal tar, an environmentally ubiquitous complex mixture of PAHs. Microarrays were used to identify differentially expressed genes (DEGs) in lung tissue collected 3 days post-exposure. Cancer-related pathways perturbed by the individual or mixtures of PAHs were identified, and dose–response modeling of the DEGs was conducted to calculate gene/pathway benchmark doses (BMDs). Individual PAH-induced pathway perturbations (the median gene expression changes for all genes in a pathway relative to controls) and pathway BMDs were applied to models of additivity [i.e., concentration addition (CA), generalized concentration addition (GCA), and independent action (IA)] to generate predicted pathway-specific dose–response curves for each PAH mixture. The predicted and observed pathway dose–response curves were compared to assess the sensitivity of different additivity models. Transcriptomics-based additivity calculation showed that IA accurately predicted the pathway perturbations induced by all mixtures of PAHs. CA did not support the additivity assumption for the defined mixtures; however, GCA improved the CA predictions. Moreover, pathway BMDs derived for coal tar were comparable to BMDs derived from previously published coal tar-induced mouse lung tumor incidence data. These results suggest that in the absence of tumor incidence data, individual chemical-induced transcriptomics changes associated with cancer can be used to investigate the assumption of additivity and to predict the carcinogenic potential of a mixture.
Collapse
Affiliation(s)
- Sarah Labib
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Andrew Williams
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Byron Kuo
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Carole L Yauk
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Paul A White
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Sabina Halappanavar
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada.
| |
Collapse
|
6
|
Labib S, Williams A, Guo CH, Leingartner K, Arlt VM, Schmeiser HH, Yauk CL, White PA, Halappanavar S. Comparative transcriptomic analyses to scrutinize the assumption that genotoxic PAHs exert effects via a common mode of action. Arch Toxicol 2016; 90:2461-80. [PMID: 26377693 PMCID: PMC5043007 DOI: 10.1007/s00204-015-1595-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/02/2015] [Indexed: 01/04/2023]
Abstract
In this study, the accuracy of the assumption that genotoxic, carcinogenic polycyclic aromatic hydrocarbons (PAHs) act via similar mechanisms of action as benzo(a)pyrene (BaP), the reference PAH used in the human health risk assessment of PAH-containing complex mixtures, was investigated. Adult male Muta™Mouse were gavaged for 28 days with seven individual, genotoxic PAHs. Global gene expression profiles in forestomach, liver, and lung (target tissues of exposure) were determined at 3 days post-exposure. The results are compared with our previously published results from mice exposed to BaP via the same exposure regimen. Although all PAHs showed enhanced ethoxyresorufin-O-deethylase activity, DNA adduct formation, and lacZ mutant frequency in the lungs, the unsupervised cluster analysis of differentially expressed genes revealed that the transcriptional changes are both PAH- and tissue-specific, with lung showing the most response. Further bioinformatics-/pathway-based analysis revealed that all PAHs induce expression of genes associated with carcinogenic processes, including DNA damage response, immune/inflammatory response, or cell signaling processes; however, the type of pathways and the magnitude of change varied for each PAH and were not the same as those observed for BaP. Benchmark dose modeling showed transcriptomic data closely reflected the known tumor incidence for the individual PAHs in each tissue. Collectively, the results suggest that the underlying mechanisms of PAH-induced toxicity leading to tumorigenesis are tissue-specific and not the same for all PAHs; based on the tissue type considered, use of BaP as a reference chemical may overestimate or underestimate the carcinogenic potential of PAHs.
Collapse
Affiliation(s)
- S Labib
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - A Williams
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - C H Guo
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - K Leingartner
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - V M Arlt
- Analytical and Environmental Sciences Division, MRC-PHE Centre for Environment and Health, King's College London, London, SE1 9NH, UK
| | - H H Schmeiser
- Division of Radiopharmaceutical Chemistry, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - C L Yauk
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - P A White
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - S Halappanavar
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada.
| |
Collapse
|
7
|
Labib S, Williams A, Yauk CL, Nikota JK, Wallin H, Vogel U, Halappanavar S. Nano-risk Science: application of toxicogenomics in an adverse outcome pathway framework for risk assessment of multi-walled carbon nanotubes. Part Fibre Toxicol 2016; 13:15. [PMID: 26979667 PMCID: PMC4792104 DOI: 10.1186/s12989-016-0125-9] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [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: 11/26/2015] [Accepted: 03/01/2016] [Indexed: 12/22/2022] Open
Abstract
Background A diverse class of engineered nanomaterials (ENMs) exhibiting a wide array of physical-chemical properties that are associated with toxicological effects in experimental animals is in commercial use. However, an integrated framework for human health risk assessment (HHRA) of ENMs has yet to be established. Rodent 2-year cancer bioassays, clinical chemistry, and histopathological endpoints are still considered the ‘gold standard’ for detecting substance-induced toxicity in animal models. However, the use of data derived from alternative toxicological tools, such as genome-wide expression profiling and in vitro high-throughput assays, are gaining acceptance by the regulatory community for hazard identification and for understanding the underlying mode-of-action. Here, we conducted a case study to evaluate the application of global gene expression data in deriving pathway-based points of departure (PODs) for multi-walled carbon nanotube (MWCNT)-induced lung fibrosis, a non-cancer endpoint of regulatory importance. Methods Gene expression profiles from the lungs of mice exposed to three individual MWCNTs with different physical-chemical properties were used within the framework of an adverse outcome pathway (AOP) for lung fibrosis to identify key biological events linking MWCNT exposure to lung fibrosis. Significantly perturbed pathways were categorized along the key events described in the AOP. Benchmark doses (BMDs) were calculated for each perturbed pathway and were used to derive transcriptional BMDs for each MWCNT. Results Similar biological pathways were perturbed by the different MWCNT types across the doses and post-exposure time points studied. The pathway BMD values showed a time-dependent trend, with lower BMDs for pathways perturbed at the earlier post-exposure time points (24 h, 3d). The transcriptional BMDs were compared to the apical BMDs derived by the National Institute for Occupational Safety and Health (NIOSH) using alveolar septal thickness and fibrotic lesions endpoints. We found that regardless of the type of MWCNT, the BMD values for pathways associated with fibrosis were 14.0–30.4 μg/mouse, which are comparable to the BMDs derived by NIOSH for MWCNT-induced lung fibrotic lesions (21.0–27.1 μg/mouse). Conclusions The results demonstrate that transcriptomic data can be used to as an effective mechanism-based method to derive acceptable levels of exposure to nanomaterials in product development when epidemiological data are unavailable. Electronic supplementary material The online version of this article (doi:10.1186/s12989-016-0125-9) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Sarah Labib
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Andrew Williams
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Carole L Yauk
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Jake K Nikota
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada
| | - Håkan Wallin
- National Research Centre for the Working Environment, Lerso Parkallé 105, DK-2100, Copenhagen, Denmark.,Department of Public Health, University of Copenhagen, DK-1353, Copenhagen K, Denmark
| | - Ulla Vogel
- National Research Centre for the Working Environment, Lerso Parkallé 105, DK-2100, Copenhagen, Denmark.,Department of Micro- and Nanotechnology, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark
| | - Sabina Halappanavar
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, K1A 0K9, Canada.
| |
Collapse
|
8
|
Chepelev NL, Moffat ID, Labib S, Bourdon-Lacombe J, Kuo B, Buick JK, Lemieux F, Malik AI, Halappanavar S, Williams A, Yauk CL. Integrating toxicogenomics into human health risk assessment: lessons learned from the benzo[a]pyrene case study. Crit Rev Toxicol 2015; 45:44-52. [PMID: 25605027 DOI: 10.3109/10408444.2014.973935] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The use of short-term toxicogenomic tests to predict cancer (or other health effects) offers considerable advantages relative to traditional toxicity testing methods. The advantages include increased throughput, increased mechanistic data, and significantly reduced costs. However, precisely how toxicogenomics data can be used to support human health risk assessment (RA) is unclear. In a companion paper ( Moffat et al. 2014 ), we present a case study evaluating the utility of toxicogenomics in the RA of benzo[a]pyrene (BaP), a known human carcinogen. The case study is meant as a proof-of-principle exercise using a well-established mode of action (MOA) that impacts multiple tissues, which should provide a best case example. We found that toxicogenomics provided rich mechanistic data applicable to hazard identification, dose-response analysis, and quantitative RA of BaP. Based on this work, here we share some useful lessons for both research and RA, and outline our perspective on how toxicogenomics can benefit RA in the short- and long-term. Specifically, we focus on (1) obtaining biologically relevant data that are readily suitable for establishing an MOA for toxicants, (2) examining the human relevance of an MOA from animal testing, and (3) proposing appropriate quantitative values for RA. We describe our envisioned strategy on how toxicogenomics can become a tool in RA, especially when anchored to other short-term toxicity tests (apical endpoints) to increase confidence in the proposed MOA, and emphasize the need for additional studies on other MOAs to define the best practices in the application of toxicogenomics in RA.
Collapse
Affiliation(s)
- Nikolai L Chepelev
- Environmental Health Science and Research Bureau, Health Canada , Ottawa, ON , Canada
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Moffat I, Chepelev N, Labib S, Bourdon-Lacombe J, Kuo B, Buick JK, Lemieux F, Williams A, Halappanavar S, Malik A, Luijten M, Aubrecht J, Hyduke DR, Fornace AJ, Swartz CD, Recio L, Yauk CL. Comparison of toxicogenomics and traditional approaches to inform mode of action and points of departure in human health risk assessment of benzo[a]pyrene in drinking water. Crit Rev Toxicol 2015; 45:1-43. [PMID: 25605026 DOI: 10.3109/10408444.2014.973934] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Toxicogenomics is proposed to be a useful tool in human health risk assessment. However, a systematic comparison of traditional risk assessment approaches with those applying toxicogenomics has never been done. We conducted a case study to evaluate the utility of toxicogenomics in the risk assessment of benzo[a]pyrene (BaP), a well-studied carcinogen, for drinking water exposures. Our study was intended to compare methodologies, not to evaluate drinking water safety. We compared traditional (RA1), genomics-informed (RA2) and genomics-only (RA3) approaches. RA2 and RA3 applied toxicogenomics data from human cell cultures and mice exposed to BaP to determine if these data could provide insight into BaP's mode of action (MOA) and derive tissue-specific points of departure (POD). Our global gene expression analysis supported that BaP is genotoxic in mice and allowed the development of a detailed MOA. Toxicogenomics analysis in human lymphoblastoid TK6 cells demonstrated a high degree of consistency in perturbed pathways with animal tissues. Quantitatively, the PODs for traditional and transcriptional approaches were similar (liver 1.2 vs. 1.0 mg/kg-bw/day; lungs 0.8 vs. 3.7 mg/kg-bw/day; forestomach 0.5 vs. 7.4 mg/kg-bw/day). RA3, which applied toxicogenomics in the absence of apical toxicology data, demonstrates that this approach provides useful information in data-poor situations. Overall, our study supports the use of toxicogenomics as a relatively fast and cost-effective tool for hazard identification, preliminary evaluation of potential carcinogens, and carcinogenic potency, in addition to identifying current limitations and practical questions for future work.
Collapse
Affiliation(s)
- Ivy Moffat
- Water and Air Quality Bureau, Health Canada, Ottawa, ON, Canada.,Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Nikolai Chepelev
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Sarah Labib
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Julie Bourdon-Lacombe
- Water and Air Quality Bureau, Health Canada, Ottawa, ON, Canada.,Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Byron Kuo
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Julie K Buick
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - France Lemieux
- Water and Air Quality Bureau, Health Canada, Ottawa, ON, Canada
| | - Andrew Williams
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Sabina Halappanavar
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Amal Malik
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Mirjam Luijten
- National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | | | - Daniel R Hyduke
- Biological Engineering Department, Utah State University, Logan, UT, USA
| | - Albert J Fornace
- Department of Biochemistry and Molecular and Cellular Biology, Georgetown University, Washington, DC, USA
| | - Carol D Swartz
- Integrated Laboratory Systems Inc., Research Triangle Park, NC, USA
| | - Leslie Recio
- Integrated Laboratory Systems Inc., Research Triangle Park, NC, USA
| | - Carole L Yauk
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| |
Collapse
|
10
|
Labib S, Guo CH, Williams A, Yauk CL, White PA, Halappanavar S. Toxicogenomic outcomes predictive of forestomach carcinogenesis following exposure to benzo(a)pyrene: Relevance to human cancer risk. Toxicol Appl Pharmacol 2013; 273:269-80. [DOI: 10.1016/j.taap.2013.05.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 05/17/2013] [Accepted: 05/21/2013] [Indexed: 02/05/2023]
|
11
|
Søs Poulsen S, Jacobsen NR, Labib S, Wu D, Husain M, Williams A, Bøgelund JP, Andersen O, Købler C, Mølhave K, Kyjovska ZO, Saber AT, Wallin H, Yauk CL, Vogel U, Halappanavar S. Transcriptomic analysis reveals novel mechanistic insight into murine biological responses to multi-walled carbon nanotubes in lungs and cultured lung epithelial cells. PLoS One 2013; 8:e80452. [PMID: 24260392 PMCID: PMC3834097 DOI: 10.1371/journal.pone.0080452] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 10/03/2013] [Indexed: 12/22/2022] Open
Abstract
There is great interest in substituting animal work with in vitro experimentation in human health risk assessment; however, there are only few comparisons of in vitro and in vivo biological responses to engineered nanomaterials. We used high-content genomics tools to compare in vivo pulmonary responses of multiwalled carbon nanotubes (MWCNT) to those in vitro in cultured lung epithelial cells (FE1) at the global transcriptomic level. Primary size, surface area and other properties of MWCNT- XNRI -7 (Mitsui7) were characterized using DLS, SEM and TEM. Mice were exposed via a single intratracheal instillation to 18, 54, or 162 μg of Mitsui7/mouse. FE1 cells were incubated with 12.5, 25 and 100 μg/ml of Mitsui7. Tissue and cell samples were collected at 24 hours post-exposure. DNA microarrays were employed to establish mechanistic differences and similarities between the two models. Microarray results were confirmed using gene-specific RT-qPCR. Bronchoalveolar lavage (BAL) fluid was assessed for indications of inflammation in vivo. A strong dose-dependent activation of acute phase and inflammation response was observed in mouse lungs reflective mainly of an inflammatory response as observed in BAL. In vitro, a wide variety of core cellular functions were affected including transcription, cell cycle, and cellular growth and proliferation. Oxidative stress, fibrosis and inflammation processes were altered in both models. Although there were similarities observed between the two models at the pathway-level, the specific genes altered under these pathways were different, suggesting that the underlying mechanisms of responses are different in cells in culture and the lung tissue. Our results suggest that careful consideration should be given in selecting relevant endpoints when substituting animal with in vitro testing.
Collapse
Affiliation(s)
- Sarah Søs Poulsen
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Science, Systems and Models, Roskilde University, Roskilde, Denmark
| | | | - Sarah Labib
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario, Canada
| | - Dongmei Wu
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario, Canada
| | - Mainul Husain
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario, Canada
| | - Andrew Williams
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario, Canada
| | | | - Ole Andersen
- Department of Science, Systems and Models, Roskilde University, Roskilde, Denmark
| | - Carsten Købler
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Kristian Mølhave
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Zdenka O. Kyjovska
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Anne T. Saber
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Håkan Wallin
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Carole L. Yauk
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario, Canada
| | - Ulla Vogel
- National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Sabina Halappanavar
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario, Canada
- * E-mail:
| |
Collapse
|
12
|
El Awa F, Fouad H, El Naga R, Emam A, Labib S. Prevalence of tobacco use among adult and adolescent females in Egypt. East Mediterr Health J 2013. [DOI: 10.26719/2013.19.8.749] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
13
|
El Awa F, Fouad H, El Naga RA, Emam AH, Labib S. Prevalence of tobacco use among adult and adolescent females in Egypt. East Mediterr Health J 2013; 19:749-754. [PMID: 24975361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 12/06/2012] [Indexed: 06/03/2023]
Abstract
Egypt assessed tobacco use among young people and adults through implementation in 2009 of the Global Youth Tobacco Survey (GYTS) among school students aged 13-15 years and the nationally representative Global Adult Tobacco Survey (GATS) among adults aged 15+ years. Both surveys employed cluster sampling to produce nationally representative samples and used standard core questionnaires with optional, country-specific questions. The results indicated that a higher percentage of adolescent girls in Egypt used tobacco than did adult females. Overall, 3.8% of girls aged 13-15 years used some form of tobacco compared with 0.6% of women aged 15+ years. Adolescents were over 14 times more likely than adult women to currently smoke cigarettes and 11 times more likely to smoke waterpipes. Moreover, the prevalence of cigarette smoking among adolescent girls had increased from 1.4% in the 2005 GYTS to 2.8% in 2009, indicating that social and cultural norms may be changing.
Collapse
|
14
|
El Kouache M, Babakhoya A, Labib S, El Madi A, Atmani S, Harandou M, Abouabdilah Y, Hida M. Repair of isolated double-chambered right ventricle. Afr J Paediatr Surg 2013; 10:199-200. [PMID: 23860078 DOI: 10.4103/0189-6725.115057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
The finding of a double-chambered right ventricle (DCRV) is exceptionally rare as an isolated anomaly. It is a congenital cardiac anomaly in which the right ventricle is separated into two chambers, a proximal high-pressure chamber and a distal low-pressure chamber, by anomalous muscles or fibrous tissues in the right ventricular cavity. We report the case of a 6-year-old infant who was admitted for growth retardation. The patient was diagnosed with an isolated DCRV without any other associated congenital anomalies. The patient underwent a successful cardiac surgical procedure of enlargement repair; he was discharged in good clinical condition with a normal cardiac function.
Collapse
Affiliation(s)
- M El Kouache
- Department of Pediatric Cardiology, The University Hospital Center Hassan II of Fes, Morocco
| | | | | | | | | | | | | | | |
Collapse
|
15
|
Boudreau É, Labib S, Bertrand AT, Decostre V, Bolongo PM, Sylvius N, Bonne G, Tesson F. Lamin A/C mutants disturb sumo1 localization and sumoylation in vitro and in vivo. PLoS One 2012; 7:e45918. [PMID: 23029315 PMCID: PMC3448699 DOI: 10.1371/journal.pone.0045918] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 08/23/2012] [Indexed: 11/18/2022] Open
Abstract
A-type lamins A and C are nuclear intermediate filament proteins in which mutations have been implicated in multiple disease phenotypes commonly known as laminopathies. A few studies have implicated sumoylation in the regulation of A-type lamins. Sumoylation is a post-translational protein modification that regulates a wide range of cellular processes through the attachment of small ubiquitin-related modifier (sumo) to various substrates. Here we showed that laminopathy mutants result in the mislocalization of sumo1 both in vitro (C2C12 cells overexpressing mutant lamins A and C) and in vivo (primary myoblasts and myopathic muscle tissue from the Lmna(H222P/H222P) mouse model). In C2C12 cells, we showed that the trapping of sumo1 in p.Asp192Gly, p.Gln353Lys, and p.Arg386Lys aggregates of lamin A/C correlated with an increased steady-state level of sumoylation. However, lamin A and C did not appear to be modified by sumo1. Our results suggest that mutant lamin A/C alters the dynamics of sumo1 and thus misregulation of sumoylation may be contributing to disease progression in laminopathies.
Collapse
Affiliation(s)
- Émilie Boudreau
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Sarah Labib
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Anne T. Bertrand
- UMRS 974, Inserm, Paris, France
- Université Pierre et Marie Curie-Paris Institut de Myologie, Paris, France
| | - Valérie Decostre
- UMRS 974, Inserm, Paris, France
- Université Pierre et Marie Curie-Paris Institut de Myologie, Paris, France
| | - Pierrette M. Bolongo
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Nicolas Sylvius
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Gisèle Bonne
- UMRS 974, Inserm, Paris, France
- Université Pierre et Marie Curie-Paris Institut de Myologie, Paris, France
- Service de Biochimie Métabolique, U.F. Cardiogénétique et Myogénétique, AP-HP Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Frédérique Tesson
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| |
Collapse
|
16
|
Hamza I, Mahmoud M, Labib S. The initial experience of safety and efficacy of argon plasma coagulation (APC) in the primary prevention of variceal bleeding. Arab J Gastroenterol 2012; 13:125-9. [PMID: 23122453 DOI: 10.1016/j.ajg.2012.08.008] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2011] [Accepted: 08/12/2012] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND STUDY AIMS The well-known complications of variceal bleeding together with the high mortality rate mandate effective prophylaxis. Because of the intolerance, failure of response and lack of compliance related to B blockers and because of the high incidence of variceal recurrence after endoscopic variceal ligation (EVL), other alternatives should be investigated. As APC provides coagulation at a shallow depth, it has been considered an ideal procedure to promote mucosal fibrosis for oesophageal varices. This study aims to investigate the safety and effectiveness of APC application to the oesophagus post-variceal obliteration in an attempt to decrease variceal recurrence and bleeding, as compared to EVL. PATIENTS AND METHODS This study included 60 patients with chronic liver disease and portal hypertension referred to the Gastrointestinal Endoscopy Unit, Kasr Al-Aini Hospital, Cairo University, during the period from August 2008 till January 2010. Patients had to have large-sized varices (F3), without history of bleeding, portal hypotensive drugs or intervention. Patients were allocated into either group I that included 30 patients for whom EVL was performed and sequentially followed by one session of APC or group II that included 30 patients for whom EVL alone was done. Patients underwent surveillance endoscopy at 3 and 6months to evaluate variceal recurrence (F1 or more). RESULTS Both groups were comparable in terms of the demographic features, hepatic functional reserve and endoscopic findings. Post-APC, fever was reported in 6.7%, dysphagia in 3.3%, procedure-related bleeding in 0% and stricture in 3.3%. At 3 and 6months follow-up, both groups were comparable in terms of variceal recurrence and none of the patients in both groups developed variceal bleeding. CONCLUSION Although, APC application to the oesophageal mucosa is a safe technique, its additive benefit in terms of variceal recurrence and re-bleeding is comparable to EVL alone. This is encountered when only a single session of APC is applied. A more beneficial effect of multiple sessions of APC awaits further studies.
Collapse
Affiliation(s)
- I Hamza
- Tropical Medicine Department, Faculty of Medicine, Cairo University, Cairo, Egypt.
| | | | | |
Collapse
|
17
|
Labib S, Yauk C, Williams A, Arlt VM, Phillips DH, White PA, Halappanavar S. Subchronic oral exposure to benzo(a)pyrene leads to distinct transcriptomic changes in the lungs that are related to carcinogenesis. Toxicol Sci 2012; 129:213-24. [PMID: 22610609 PMCID: PMC3430207 DOI: 10.1093/toxsci/kfs177] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 05/07/2012] [Accepted: 05/08/2012] [Indexed: 11/29/2022] Open
Abstract
We have previously shown that acute oral exposure to the environmental carcinogen benzo(a)pyrene (BaP) elicits comparable levels of DNA adducts, but distinct transcriptomic changes, in mouse lungs and livers, the two main BaP bioactivating organs. Oral BaP exposure is predominantly associated with lung cancer and not hepatic cancer in some animal models, suggesting that gene expression differences may provide insight into the drivers of tissue-specific carcinogenesis. In the present study, we examine pulmonary DNA adduct formation, lacZ mutant frequency, and mRNA profiles in adult male MutaMouse following subchronic (28 day) oral exposure to BaP (0, 25, 50, and 75 mg/kg/day) and sacrificed 3 days postexposure. The results are compared with those obtained from livers of the same mice (previously published). Although there was a 1.8- to 3.3-fold increase in the levels of DNA adducts in lung compared with liver, the lacZ transgene mutant frequency was similar in both tissues. At the transcriptomic level, a transition from activation of the DNA damage response p53 pathway at the low dose to the induction of genes involved in angiogenesis, evasion of apoptosis and growth signals at the high doses was evident only in the lungs. These results suggest that tissue DNA adducts and mutant frequency are sensitive markers of target tissue exposure and mode of action, whereas early changes in gene expression may provide a better indication of the likelihood of carcinogenic transformation in selected tissues. Moreover, the study provides new information on the underlying mechanisms that contribute to tissue-specific responses to BaP.
Collapse
Affiliation(s)
- Sarah Labib
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada; and
| | - Carole Yauk
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada; and
| | - Andrew Williams
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada; and
| | - Volker M. Arlt
- Analytical and Environmental Sciences Division, King’s College London, London, SE1 9NH, U.K.
| | - David H. Phillips
- Analytical and Environmental Sciences Division, King’s College London, London, SE1 9NH, U.K.
| | - Paul A. White
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada; and
| | - Sabina Halappanavar
- Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada; and
| |
Collapse
|
18
|
Houari N, Labib S, Berdai MA, Harandou M. [Postpartum pneumomediastinum associated with subcutaneous emphysema: a case report]. ACTA ACUST UNITED AC 2012; 31:728-30. [PMID: 22766467 DOI: 10.1016/j.annfar.2012.04.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Accepted: 04/19/2012] [Indexed: 11/29/2022]
Abstract
This case report refers to a 21-year-old primigravida, who complained of dyspnoea and was noticed to have unusual swelling of the face and neck after home delivery. A diagnosis of subcutaneous emphysema was made and this was confirmed with the chest X-ray. Pneumomediastinum and hydropneumothorax were also detected. Uneventful recovery over three days followed conservative management.
Collapse
Affiliation(s)
- N Houari
- Service de réanimation mère-enfant, CHU Hassan II, route Sidi Harazem, 30000 Fès, Maroc.
| | | | | | | |
Collapse
|
19
|
Oueriagli Nabih Z, Labib S, Harrandou M. Le retard diagnostique dans la maladie hémorragique du nouveau-né : d’une simple lésion cutanée à une hémorragie cérébroméningée. Arch Pediatr 2012. [DOI: 10.1016/j.arcped.2011.10.019] [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]
|
20
|
Labib S, Berdai MA, Bendadi A, Achour S, Harandou M. Intoxication mortelle à l’Indigofera. Arch Pediatr 2012; 19:59-61. [DOI: 10.1016/j.arcped.2011.10.011] [Citation(s) in RCA: 3] [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: 05/09/2011] [Revised: 06/15/2011] [Accepted: 10/11/2011] [Indexed: 10/14/2022]
|
21
|
Derkaoui A, Elbouazzaoui A, Elhouari N, Achour S, Labib S, Sbai H, Harrandou M, Khatouf M, Kanjaa N. Intoxication aiguë sévère par les pesticides organophosphorés: à propos de 28 cas. Pan Afr Med J 2011. [DOI: 10.4314/pamj.v8i1.71067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
22
|
Derkaoui A, Labib S, Elbouazzaoui A, Achour S, Sbai H, Harrandou M, Khatouf M, Kanjaa N. Intoxication par la paraphényléne-diamine (takaout) au Maroc: à propos de 24 cas. Pan Afr Med J 2011. [DOI: 10.4314/pamj.v8i1.71073] [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: 11/17/2022] Open
|
23
|
Oueriagli Nabih Z, Labib S, Harandou M. [Delayed diagnosis of newborn vitamin K deficiency bleeding: from simple cutaneous lesion to intracranial hemorrhage]. Arch Pediatr 2011; 18:914-6. [PMID: 21723100 DOI: 10.1016/j.arcped.2011.05.021] [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] [Received: 03/10/2011] [Revised: 03/29/2011] [Accepted: 05/24/2011] [Indexed: 10/18/2022]
|
24
|
Małek ŁA, Labib S, Mazurkiewicz Ł, Saj M, Płoski R, Tesson F, Bilińska ZT. A new c.1621 C>G, p.R541G lamin A/C mutation in a family with DCM and regional wall motion abnormalities (akinesis/dyskinesis): genotype–phenotype correlation. J Hum Genet 2010; 56:83-6. [DOI: 10.1038/jhg.2010.137] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
25
|
Abourazzak S, Atmani S, Labib S, Achour S, Chaouki S, Harrandou M, Bouharrou A, Hida M. P505 - Le tropisme cardiovasculaire des envenimations scorpioniques chez l’enfant. Arch Pediatr 2010. [DOI: 10.1016/s0929-693x(10)70898-8] [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: 10/19/2022]
|
26
|
Gupta P, Bilinska ZT, Sylvius N, Boudreau E, Veinot JP, Labib S, Bolongo PM, Hamza A, Jackson T, Ploski R, Walski M, Grzybowski J, Walczak E, Religa G, Fidzianska A, Tesson F. Genetic and ultrastructural studies in dilated cardiomyopathy patients: a large deletion in the lamin A/C gene is associated with cardiomyocyte nuclear envelope disruption. Basic Res Cardiol 2010; 105:365-77. [PMID: 20127487 DOI: 10.1007/s00395-010-0085-4] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Revised: 01/12/2010] [Accepted: 01/13/2010] [Indexed: 12/24/2022]
Abstract
Major nuclear envelope abnormalities, such as disruption and/or presence of intranuclear organelles, have rarely been described in cardiomyocytes from dilated cardiomyopathy (DCM) patients. In this study, we screened a series of 25 unrelated DCM patient samples for (a) cardiomyocyte nuclear abnormalities and (b) mutations in LMNA and TMPO as they are two DCM-causing genes that encode proteins involved in maintaining nuclear envelope architecture. Among the 25 heart samples investigated, we identified major cardiomyocyte nuclear abnormalities in 8 patients. Direct sequencing allowed the detection of three heterozygous LMNA mutations (p.D192G, p.Q353K and p.R541S) in three patients. By multiplex ligation-dependant probe amplification (MLPA)/quantitative real-time PCR, we found a heterozygous deletion encompassing exons 3-12 of the LMNA gene in one patient. Immunostaining demonstrated that this deletion led to a decrease in lamin A/C expression in cardiomyocytes from this patient. This LMNA deletion as well as the p.D192G mutation was found in patients displaying major cardiomyocyte nuclear envelope abnormalities, while the p.Q353K and p.R541S mutations were found in patients without specific nuclear envelope abnormalities. None of the DCM patients included in the study carried a mutation in the TMPO gene. Taken together, we found no evidence of a genotype-phenotype relationship between the onset and the severity of DCM, the presence of nuclear abnormalities and the presence or absence of LMNA mutations. We demonstrated that a large deletion in LMNA associated with reduced levels of the protein in the nuclear envelope suggesting a haploinsufficiency mechanism can lead to cardiomyocyte nuclear envelope disruption and thus underlie the pathogenesis of DCM.
Collapse
Affiliation(s)
- Pallavi Gupta
- Faculty of Health Sciences, University of Ottawa, Ottawa, ON, K1H 8M5, Canada
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Sbai H, Labib S, Derkaoui A, Harrandou M, Khattouf M, Kanjaa N. L’intoxication aiguë au phosphure d’aluminium : profil épidémiologique et facteurs pronostiques. À propos de 8 cas. Rev Epidemiol Sante Publique 2009. [DOI: 10.1016/j.respe.2009.02.182] [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
|
28
|
|
29
|
Meddeb N, Bachrouch N, Elleuch M, Sahli H, Cheour E, Labib S, Sellami S. [Hydatid cyst of the adductor muscles. MRI aspect, Apropos of 1 case]. Bull Soc Pathol Exot 2001; 94:106-8. [PMID: 11475025] [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: 02/20/2023]
Abstract
Muscular involvement is rare, representing less than 1% of hydrated cyst localisation's. Clinical symptoms are insidious and non-specific causing a frequent delay in diagnosis. We report the observation of a 50 year-old woman consulting for inguinal tumefaction with radiological exploration suggestive of hydrated cyst of adductors muscles. Magnetic resonance imaging is helpful in diagnosis, since it reveals a very suggestive aspect. Treatment is based on surgery, which cures patients but incurs a low risk of local relapse.
Collapse
Affiliation(s)
- N Meddeb
- Service de rhumatologie, Hôpital la Rabta, Tunis, Tunisie
| | | | | | | | | | | | | |
Collapse
|
30
|
Abstract
OBJECTIVES To determine the prevalence of iron depletion and deficiency, and iron-deficiency anaemia, along with risk factors for iron depletion, in Australian-born children aged 12-36 months of Arabic-speaking background. DESIGN Community-based survey. SETTING Central Sydney Area Health Service (CSAHS), NSW, April to August, 1997. PARTICIPANTS All children born at five Sydney hospitals between 1 May 1994 and 30 April 1996, whose mothers gave an Arabic-speaking country of birth and resided in the area served by the CSAHS. MAIN OUTCOME MEASURES Full blood count (haemoglobin, mean corpuscular haemoglobin, mean corpuscular volume), plasma ferritin concentration, haemoglobin electrophoresis, potential risk factors for iron depletion. RESULTS Families of 641 of the 1,161 eligible children were able to be contacted, and 403 agreed to testing (response rate, 62.9% among those contacted). Overall, 6% of children had iron-deficiency anaemia, another 9% were iron deficient without anaemia, and 23% were iron depleted. Multiple logistic regression analysis showed three significant independent risk factors for iron depletion: <37 weeks' gestation (odds ratio [OR], 5.88, P=0.001); mother resident in Australia for less than the median time of 8.5 years (OR, 1.96, P=0.016); and daily intake of >600 mL cows' milk (OR, 3.89, P=<0.001). CONCLUSION Impaired iron status is common among children of Arabic background, and targeted screening is recommended for this group.
Collapse
Affiliation(s)
- M A Karr
- Division of General Practice, Central Sydney Area Health Service, NSW
| | | | | | | | | | | | | |
Collapse
|
31
|
Karr M, Mira M, Alperstein G, Labib S. Immunization coverage of Australian-born children of Arabic-speaking background in Central Sydney. J Paediatr Child Health 2001; 37:28-31. [PMID: 11168865 DOI: 10.1046/j.1440-1754.2001.00582.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVES To examine the immunization coverage rates of 12-36-month-old Australian-born children from an Arabic-speaking background in Central Sydney as determined by parental report and documentary evidence. METHODOLOGY Eligible children were identified by examination of the records of five hospitals. Eligibility criteria were that the mother gave an Arabic speaking country of birth and a Central Sydney post code (as her place of residence) and the child was born between 1 May 1994 and 30 April 1996. Parents of all eligible children were invited to participate, either by a special appointment to answer a structured questionnaire, or by telephone survey. Of the 1157 eligible children identified from hospital birth records, only 641 could be contacted, of whom 584 (91.1%) agreed to participate. Full information on age appropriate immunization rates, as reported by parents and documented in records, could be assessed for 403 children. RESULTS Parents reported that 97.6% of children were fully immunized. When the child's immunization status could be verified from either the child's personal health record and/or the service provider, the rate of full, age-appropriate immunization was 94.3% (95% confidence intervals 92.0-96.6) compared to a parent-reported rate of 98.0%. General practitioners provided 76.2% of immunizations. CONCLUSION While a substantial proportion of children identified from birth records could not be contacted, comparisons with census data and other analyses indicate that this sample is likely to be representative of the general population of 12-36-month-old Australian-born children from an Arabic-speaking background. This group appeared to be highly immunized. Further studies examining why the rates for this ethnic group are high in Central Sydney may determine strategies which will enhance immunization rates in other communities.
Collapse
Affiliation(s)
- M Karr
- Division of General Practice, Central Sydney Area Health Service, Balmain, New South Wales, Australia
| | | | | | | |
Collapse
|
32
|
Abstract
A prospective double blind randomized study was carried out using 20 healthy males with anterior cruciate ligament (ACL) insufficiency undergoing bone-patellar tendon-bone ACL reconstruction. The subjects were randomized into either water or saline irrigation and then underwent identical reconstructive procedures using an arthroscopic pump. Continuous preoperative, intraoperative, and postoperative pressures were monitored using the slit catheter technique. Blood pressure and compartment pressure measurements were continuously recorded and noted at all stages of the procedure. Mean preoperative anterior and posterior compartment pressures were similar in both groups. No significant differences were noted between the anterior and posterior compartments of each group. No difference between water and saline irrigation was identified throughout the procedure. In both groups, postoperative pressures were slightly lower in the anterior and posterior compartments compared with preoperative pressures, but not significantly.
Collapse
Affiliation(s)
- A Amendola
- Division of Orthopaedic Surgery, Fowler-Kennedy Sport Medicine Clinic, the University of Western Ontario, London, Canada
| | | | | | | | | | | |
Collapse
|
33
|
Fiscella RG, Gieser J, Phillpotts B, Gilmartin C, Labib S, Cwik MJ, Solomon MJ, Shapiro MJ. Intraocular penetration of gentamicin after once-daily aminoglycoside dosing. Retina 1998; 18:339-42. [PMID: 9730177 DOI: 10.1097/00006982-199807000-00008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Intraocular concentrations-particularly intravitreal concentrations-after systemic administration of gentamicin are poor. Once-daily aminoglycoside dosing of intravenous gentamicin achieves peak serum levels up to five times higher than conventional dosing. Whether these increased serum levels of gentamicin improve the aqueous or vitreous concentrations in humans has not been determined. The authors sought to determine if the intraocular penetration of gentamicin would be improved using this method. METHODS Patients undergoing vitrectomy procedures were administered intravenous gentamicin in a dose of 7 mg/kg approximately 1 hour before surgery. An adjustment in dosing was made for anyone more than 20% over his or her ideal body weight. Aqueous, vitreous, and serum samples were collected before any intraocular surgical manipulation. The samples were analyzed by fluorescence polarization immunoassay (TDx system). RESULTS The average single gentamicin dose was 498 mg (range, 360-700 mg). The aqueous, vitreous, and serum levels averaged 1.14 microg/mL, 0.41 microg/mL, and 22.07 microg/mL, respectively. No correlation between serum level concentrations and time of administration was found for the aqueous and vitreous levels in this study. CONCLUSION Although the average peak serum level of gentamicin was five times higher than previously reported, the vitreous levels averaged only 1.5 times higher. The blood-retinal barrier is difficult to penetrate even when higher serum levels are achieved. Due to its poor ocular penetration, gentamicin may not be among the best drugs for prophylaxis of penetrating eye injuries, surgical prophylaxis, or treatment of endophthalmitis.
Collapse
Affiliation(s)
- R G Fiscella
- Department of Pharmacy Practice, the University of Illinois at Chicago, 60612, USA
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Abstract
PURPOSE To determine the aqueous and vitreous fluid penetration of ofloxacin after a combined topical and single intravenous dose protocol before vitrectomy surgery. MATERIALS AND METHODS Before undergoing vitrectomy surgery, patients were given two drops of ofloxacin 0.3% topically and a single intravenous dose of ofloxacin 400 mg. Aqueous (mean, 43 minutes) and vitreous (mean, 53 minutes) fluid samples were collected at the start of the surgical procedure. The samples were analyzed for ofloxacin penetration. RESULTS The mean aqueous fluid concentration was 1.083 micrograms/mL +/- 0.406. The mean +/- SD vitreous fluid concentration in nondiabetic patients with intact vitreous was 0.352 microgram/mL +/- 0.301. Vitreous levels obtained more than 50 minutes after administration (0.414 microgram/mL +/- 0.336) were generally higher than those obtained after less than 50 minutes (P = 0.12). Eyes with prior vitrectomies achieved better ofloxacin penetration (0.984 microgram/mL +/- 0.680) than did nonvitrectomized eyes. CONCLUSION Ofloxacin achieved measurable aqueous fluid penetration after topical and intravenous administration. Aqueous levels were above the minimum inhibitory concentration for most ocular pathogens. Vitreous levels were adequate in vitrectomized eyes to achieve inhibitory concentrations against many common ocular pathogens. Combined preoperative topical and a single dose of intravenous ofloxacin may provide inhibitory aqueous and vitreous antibiotic levels in vitrectomized eyes in cases where intravitreal antibiotics are not considered and oral administration is not practical.
Collapse
Affiliation(s)
- R G Fiscella
- Department of Ophthalmology, University of Illinois at Chicago
| | | | | | | | | | | |
Collapse
|
35
|
|
36
|
Abstract
We wished to determine the stability of frozen, refrigerated, and room temperature topical cyclosporine 1% in artificial tears (Tears Plus). Cyclosporine 1% eye drops were made in artificial tears prior to the manufacturers recommendations of using a lipid soluble vehicle, such as olive oil. Patients preferred the artificial tears preparation over the oil based cyclosporine product. Because of the good clinical response and the reluctance of patients to change to the oil vehicle product, we determined the stability of cyclosporine 1% in artificial tears. Cyclosporine 1% was prepared in artificial tears (polyvinyl alcohol 1.4% and povidone 0.6%) by adding 1 ml of the injectable (50 mg/ml) cyclosporine into 4 ml of the artificial tears solution. Each bottle was frozen at -20 degrees C for one month and then the cyclosporine concentration was determined after thawing and refrigeration or storage at room temperature. Refrigerated stability was determined after thawing for up to 28 days and room temperature stability was determined for up to 1 week after thawing. Cyclosporine concentration was determined by HPLC analysis. None of the samples exhibited any significant loss of cyclosporine at any time period. Frozen cyclosporine appears stable when frozen in a 1% solution for one month. Cyclosporine 1% in artificial tears is stable for up to 28 days in the refrigerator or at least 7 days at room temperature. Because of the ease of preparation, the proven clinical effectiveness of the product and better patient acceptance, we continue to make this product.
Collapse
Affiliation(s)
- R G Fiscella
- College of Pharmacy, University of Illinois at Chicago, USA
| | | | | | | |
Collapse
|
37
|
Goadsby PJ, Labib S. Balkan ophthalmic neuralgia: an unusual war-related facial pain. Med J Aust 1993; 158:71. [PMID: 8417313 DOI: 10.5694/j.1326-5377.1993.tb121685.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
38
|
|
39
|
Yousef RT, el-Nakeeb MA, Labib S. Effect of magnesium trisilicate o the antibacterial activity of benzalkonium chloride. Acta Pharm Suec 1971; 8:303-10. [PMID: 4327070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|