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Huang HC, Wang TY, Rousseau J, Orlando M, Mungaray M, Michaud C, Plaisier C, Chen ZB, Wang KC. Biomimetic nanodrug targets inflammation and suppresses YAP/TAZ to ameliorate atherosclerosis. Biomaterials 2024; 306:122505. [PMID: 38359507 DOI: 10.1016/j.biomaterials.2024.122505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 01/21/2024] [Accepted: 02/07/2024] [Indexed: 02/17/2024]
Abstract
Atherosclerosis, a chronic inflammatory disease, is the primary cause of myocardial infarction and ischemic stroke. Recent studies have demonstrated that dysregulation of yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding domain (TAZ) contributes to plaque development, making YAP/TAZ potential therapeutic targets. However, systemic modulation of YAP/TAZ expression or activities risks serious off-target effects, limiting clinical applicability. To address the challenge, this study develops monocyte membrane-coated nanoparticles (MoNP) as a targeted delivery system for activated and inflamed endothelium lining the plaque surface. The MoNP system is used to deliver verteporfin (VP), aimed at inhibiting YAP/TAZ specifically within arterial regions prone to atherosclerosis. The results reveal that MoNP significantly enhance payload delivery to inflamed endothelial cells (EC) while avoiding phagocytic cells. When administered in mice, MoNP predominantly accumulate in intima of the atheroprone artery. MoNP-mediated delivery of VP substantially reduces YAP/TAZ expression, thereby suppressing inflammatory gene expression and macrophage infiltration in cultured EC and mouse arteries exposed to atherogenic stimuli. Importantly, this targeted VP nanodrug effectively decreases plaque development in mice without causing noticeable histopathological changes in major organs. Collectively, these findings demonstrate a lesion-targeted and pathway-specific biomimetic nanodrug, potentially leading to safer and more effective treatments for atherosclerosis.
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Affiliation(s)
- Hui-Chun Huang
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Ting-Yun Wang
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA; School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, 85287, USA
| | - Joshua Rousseau
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Mark Orlando
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Michelle Mungaray
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Chamonix Michaud
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Christopher Plaisier
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Zhen Bouman Chen
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope, Duarte, CA, 91010, USA
| | - Kuei-Chun Wang
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85287, USA.
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Huang HC, Wang TY, Rousseau J, Mungaray M, Michaud C, Plaisier C, Chen ZB, Wang KC. Lesion-specific suppression of YAP/TAZ by biomimetic nanodrug ameliorates atherosclerosis development. bioRxiv 2023:2023.04.24.537992. [PMID: 37163067 PMCID: PMC10168204 DOI: 10.1101/2023.04.24.537992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Atherosclerosis, characterized by the buildup of lipid-rich plaque on the vessel wall, is the primary cause of myocardial infarction and ischemic stroke. Recent studies have demonstrated that dysregulation of yes-associated protein 1 (YAP) and transcriptional coactivator with PDZ-binding domain (TAZ) contributes to plaque development, making YAP/TAZ potential therapeutic targets. However, systemic modulation of YAP/TAZ expression or activities risks serious off-target effects, limiting clinical applicability. To address the challenge, this study develops monocyte membrane-coated nanoparticles (MoNP) as a drug delivery vehicle targeting activated endothelium lining the plaque surface and utilizes MoNP to deliver verteporfin (VP), a potent YAP/TAZ inhibitor, for lesion-specific treatment of atherosclerosis. The results reveal that MoNP significantly enhance payload delivery to inflamed endothelial cells (EC) while avoiding phagocytic cells, and preferentially accumulate in atherosclerotic regions. MoNP-mediated delivery of VP substantially reduces YAP/TAZ expression, suppressing inflammatory gene expression and macrophage infiltration in cultured EC and mouse arteries exposed to atherogenic stimuli. Importantly, this lesion-targeted VP nanodrug effectively decreases plaque development in mice without causing noticeable histopathological changes in major organs. Collectively, these findings demonstrate a plaque-targeted and pathway-specific biomimetic nanodrug, potentially leading to safer and more effective treatments for atherosclerosis.
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Perroni P, Ferraz T, Rousseau J, Canaff C, Varela H, Napporn T. Stainless Steel supported NiCo2O4 active layer for Oxygen Evolution Reaction. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142295] [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: 03/29/2023]
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Tampaktsi C, Gancel AL, Escudier JL, Samson A, Ojeda H, Pic L, Rousseau J, Gauthier P, Viguier D, Furet MI, Teissedre PL. Phenolic potential of new red hybrid grape varieties to produce quality wines and identification by the malvin. BIO Web Conf 2023. [DOI: 10.1051/bioconf/20235602012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
The hybrids are new varieties that are resistant to the cryptogamic diseases of vines, and they may be a good solution to the reduction of pesticide use. However, these new varieties have appeared recently and only few studies have been conducted to check the quality of the wine that they produce. In this study, wines originated from hybrids were chemically characterized (polyphenols, tannins, anthocyanins, and color analysis). Results show that their oenological parameters were close to those of the Vitis vinifera wines. The wines made from Vinifera (100%), with Vidoc, and all the resistant Bouquets studied are malvidin-3 glucoside dominant, and all the others hybrids varieties are cyanidin dominant. Furthermore, the hybrid wines had a higher concentration in condensed tannins and a lower one in molecular tannins compared with the Vitis vinifera wines, except for the Vidoc wines. As far as the anthocyanin content is concerned, the samples contained anthocyanin diglucosides, with the malvidin-3,5-diglucoside (malvin) the most abundant one. Also, their concentration in molecular anthocyanins were higher than the concentration in normal wines. The Vidoc wines do not contain any malvin. For the other wines, malvin co-eluted with cyanidin-3-O-glucoside and in this case, the cyanidin’s concentration was impressively higher than the Vidoc wines. The current OIV method gives different results for malvidol diglucoside compared to the use of an HPLC chromatography method (HPLC-DAD-QQQ). The current OIV method does not appear reliable in comparison with the HPLC method for detecting malvin. Finally, the hybrid wines had a darker blue/purplish color than the Vitis vinifera wines.
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Huang HC, Rousseau J, Wang TY, Mungaray M, Wang KC. Monocyte-mimicking Nanoparticles for Atherosclerosis-targeted Therapy. JVS Vasc Sci 2022. [DOI: 10.1016/j.jvssci.2022.05.053] [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: 11/17/2022] Open
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Huang HC, Rousseau J, Wang TY, Mungaray M, Wang KC. Abstract 231: Monocyte-mimicking Nanoparticles For Atherosclerosis-targeted Therapy. Arterioscler Thromb Vasc Biol 2022. [DOI: 10.1161/atvb.42.suppl_1.231] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Atherosclerosis, characterized by plaque buildup in arteries, is a major cause of cardiovascular mortality globally. Despite advances in diagnostics and interventions over the past few decades, the treatment options and outcomes remain far less than optimal. Nanotechnology has demonstrated emerging success in clinical settings; however, a potent targeted nanotherapeutic for atherosclerosis remains underdeveloped. In this study, we designed a new class of nanocarriers mimicking circulating monocyte features to enhance the site-specific delivery of theranostic agents for atherosclerosis. We first synthesized polymeric cores encapsulating a fluorescent payload with a modified nanoprecipitation method and cloaked the polymeric cores (NPs) with the plasma membrane fraction isolated from mouse monocytes. Our characterization results verified that NP cores are covered with a uniform lipid layer and that the resulting monocyte-mimicking nanoparticles (MNPs) retain the membrane proteins on their surface and have a similar value of zeta potential as monocytes. Both MNPs and NPs did not exhibit any hemotoxicity
in vitro
; however, when incubated with cultured human vascular endothelial cells (ECs), MNPs showed a significantly higher uptake efficiency by ECs than NPs. Moreover, our
in vivo
studies with ApoE-knockout mice indicates that MNPs accumulated only in the atherosclerotic arteries but no other areas of the vasculature when administered intravenously. To summarize, our findings strongly support that monocyte membrane cloaking facilitates the nanoparticle attachment to atherosclerotic regions and enhances the entry of nanoparticles into the inflammatory endothelium in the arteries, suggesting that MNPs would serve as an excellent delivery strategy for targeted atherosclerosis therapy.
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Makansi N, Rousseau J, Bedos C. Domiciliary dentistry clinics: a multiple case study in the province of Quebec, Canada. BMC Health Serv Res 2021; 21:972. [PMID: 34526032 PMCID: PMC8442809 DOI: 10.1186/s12913-021-06788-4] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/21/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The demand for more flexible and person-centered models of oral healthcare delivery is increasing and while mobile and domiciliary dental services have the potential to increase access to oral healthcare among dependent elderly and people with disabilities; the uptake of this service model by dentists remains low. Therefore, the aim of this study was to understand how existing domiciliary dental services operate within a particular context. METHODS We used a qualitative descriptive multiple case study design. We studied three independent domiciliary dentistry clinics in the province of Quebec, Canada. We completed observations of 27 domiciliary visits, four of which were in private homes and the remaining 23 in LTCFs. We also conducted semi-structured interviews with dental professionals, patients, and caregivers. We performed a qualitative content analysis using a deductive/inductive coding framework. RESULTS We presented a detailed description of the physical and service features of the studied cases. Physical features included the set-up of the mobile clinics, the portable equipment used, and the domiciliary locations of visits. For service features, we described the roles, attitudes, and interactions among those involved on both the providers' and recipients' sides, as well as, the logistical and financial aspect of the domiciliary dental services. CONCLUSIONS Despite variations in setup and years of practice, the three mobile clinics had similar physical and service features. They also faced common logistic challenges but were able to provide services and respond to the high demand for domiciliary dental services. Additional research in different contexts would further contribute to building evidence-based models to help increase the uptake of this type of practice by current and future dental professionals.
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Affiliation(s)
- N Makansi
- Faculty of Dentistry, McGill University, 2001 McGill College Ave, Montreal, Quebec, H3A 1G1, Canada.
| | - J Rousseau
- School of Rehabilitation, Université de Montréal, 7077 avenue du Parc. Mailing address : C.P. 6128 Centre-ville, Montreal, Quebec, H3C 3J7, Canada.,Research Center, Institut Universitaire de Gériatrie de Montréal, Montreal, Canada
| | - C Bedos
- Faculty of Dentistry, McGill University, 2001 McGill College Ave, Montreal, Quebec, H3A 1G1, Canada
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Bielefeld V, Rousseau J, Denis C, Giraud L, Vallon A, Huet K, Lehuede K, Konig R, Lassalle D, Wendel J, Péré M, Plaineau M, Ducloyer JB, Couret C, Lebranchu P, Le Meur G. [Impact of prematurity on the optic nerve]. J Fr Ophtalmol 2021; 44:703-710. [PMID: 33840493 DOI: 10.1016/j.jfo.2020.06.048] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/27/2020] [Accepted: 06/21/2020] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Thanks to the progress made in the past few years in pediatric intensive care as well as the increased survival of preterm infants, the consequences of premature birth are increasingly well documented. With regard to ophthalmologic complications, retinopathy of prematurity is well described, but the optic nerve may also be affected. The goal of this study is to compare the optic nerves of preterm infants as a function of their gestational period with a control group of the same age. MATERIALS AND METHODS We conducted a case-control study pairing a full-term infant with each preterm infant. Inclusion criteria were: any child from 5- to 10-years-old, separated into three sub-groups according to their degree of prematurity. Variables were: cup/disc ratio, ocular biometry, intraocular pressure and RNFL thickness. RESULTS Thirty-seven preterm infants and 37 controls were included in the study. The mean age at the time of inclusion was 7.05 years for the preterm group and 7.19 years for the control group. No significant difference was observed in axial length or spherical equivalent (P=0.31 and P=0.98, respectively). No significant difference was observed in pachymetry or intraocular pressure (P=0.28 and P=0.22, respectively). We observed a significant increase of 0.1 in the cup/disc ratio of the preterm group compared to the control group (P<0.05). The preterm group cup/disc ratio was 0.36 versus 0.27 for the control group. No significant difference was observed in the 7 quadrants of RNFL between the two groups. However, when comparing infants born before 28 weeks gestation with the control group, we observed a mean decrease of 14.5 microns in the superior temporal sector (P=0.04), a 9 micron decrease in the global thickness G (P=0.03) and a 12.7 micron decrease in the nasal sector (P=0.01). CONCLUSIONS In the case of the studied children (aged 5 to 10), the reduced RNFL fiber thickness is a phenomenon dependent essentially on the stage of prematurity. It would be useful to follow these preterm populations over the long term and to compare them to a matched control group to be able to obtain functional results.
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Affiliation(s)
| | | | - C Denis
- CHU de Nantes, Nantes, France
| | | | | | - K Huet
- CHU de Nantes, Nantes, France
| | | | - R Konig
- CHU de Nantes, Nantes, France
| | | | | | - M Péré
- CHU de Nantes, Nantes, France
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Bogado Pascottini O, Spricigo JFW, Van Schyndel SJ, Mion B, Rousseau J, Weese JS, LeBlanc SJ. Effects of parity, blood progesterone, and non-steroidal anti-inflammatory treatment on the dynamics of the uterine microbiota of healthy postpartum dairy cows. PLoS One 2021; 16:e0233943. [PMID: 33606706 PMCID: PMC7895344 DOI: 10.1371/journal.pone.0233943] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 01/28/2021] [Indexed: 01/10/2023] Open
Abstract
This study evaluated the effects of treatment with meloxicam (a non-steroidal anti-inflammatory drug), parity, and blood progesterone concentration on the dynamics of the uterine microbiota of 16 clinically healthy postpartum dairy cows. Seven primiparous and 9 multiparous postpartum Holstein cows either received meloxicam (0.5 mg/kg SC, n = 7 cows) once daily for 4 days (10 to 13 days in milk (DIM)) or were untreated (n = 9 cows). Endometrial cytology samples were collected by cytobrush at 10, 21, and 35 DIM, from which the microbiota analysis was conducted using 16S rRNA gene sequence analysis. A radioimmunoassay was used to measure progesterone concentration in blood serum samples at 35 DIM and cows were classified as ˃ 1 ng/mL (n = 10) or ≤ 1 ng/mL (n = 6). Alpha diversity for bacterial genera (Chao1, Shannon-Weiner, and Camargo’s evenness indices) were not affected by DIM, meloxicam treatment, parity, or progesterone category. For beta diversity (genera level), principal coordinate analysis (Bray-Curtis) showed differences in microbiota between parity groups. At the phylum level, the relative abundance of Actinobacteria was greater in primiparous than multiparous cows. At the genus level, there was lesser relative abundance of Bifidobacterium, Lactobacillus, Neisseriaceae, Paracoccus, Staphylococcus, and Streptococcus and greater relative abundance of Bacillus and Fusobacterium in primiparous than multiparous cows. Bray-Curtis dissimilarity did not differ by DIM at sampling, meloxicam treatment, or progesterone category at 35 DIM. In conclusion, uterine bacterial composition was not different at 10, 21, or 35 DIM, and meloxicam treatment or progesterone category did not affect the uterine microbiota in clinically healthy postpartum dairy cows. Primiparous cows presented a different composition of uterine bacteria than multiparous cows. The differences in microbiota associated with parity might be attributable to changes that occur consequent to the first calving, but this hypothesis should be investigated further.
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Affiliation(s)
- O. Bogado Pascottini
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
- * E-mail:
| | - J. F. W. Spricigo
- Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada
| | - S. J. Van Schyndel
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - B. Mion
- Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada
| | - J. Rousseau
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - J. S. Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - S. J. LeBlanc
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Jouannic JM, Blondiaux E, Senat MV, Friszer S, Adamsbaum C, Rousseau J, Hornoy P, Letourneau A, de Laveaucoupet J, Lecarpentier E, Rosenblatt J, Quibel T, Mollot M, Ancel PY, Alison M, Goffinet F. Prognostic value of diffusion-weighted magnetic resonance imaging of brain in fetal growth restriction: results of prospective multicenter study. Ultrasound Obstet Gynecol 2020; 56:893-900. [PMID: 31765031 DOI: 10.1002/uog.21926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 11/08/2019] [Accepted: 11/15/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To measure prospectively apparent diffusion coefficient (ADC) values between 28 and 32 weeks of gestation in different cerebral territories of fetuses with estimated fetal weight (EFW) ≤ 5th centile, and analyze their association with adverse perinatal outcome. METHODS This was a prospective study involving six tertiary-level perinatal centers. In the period 22 November 2016 to 11 September 2017, we included singleton, small-for-gestational-age (SGA) fetuses with EFW ≤ 5th percentile, between 28 and 32 weeks of gestation, regardless of the umbilical artery Doppler and maternal uterine artery Doppler findings. A fetal magnetic resonance imaging (MRI) examination with diffusion-weighted sequences (DWI) was performed within 14 days following inclusion and before 32 weeks. ADC values were calculated in the frontal and occipital white matter, basal ganglia and cerebellar hemispheres. An ultrasound examination was performed within 1 week prior to the MRI examination. The primary outcome was a composite measure of adverse perinatal outcome, defined as any of the following: perinatal death; admission to neonatal intensive care unit with mechanical ventilation > 48 h; necrotizing enterocolitis; Grade III-IV intraventricular hemorrhage; periventricular leukomalacia. A univariate comparison of median ADC values in all cerebral territories between fetuses with and those without adverse perinatal outcome was performed. The association between ADC values and adverse perinatal outcome was then analyzed using multilevel logistic regression models to adjust for other common prognostic factors for growth-restricted fetuses. RESULTS MRI was performed in 64 patients, of whom five were excluded owing to fetal movement artifacts on DWI and two were excluded for termination of pregnancy with no link to fetal growth restriction (FGR). One intrauterine death occurred secondary to severe FGR. Among the 56 liveborn neonates, delivered at a mean ± SD gestational age of 33.6 ± 3.0 weeks, with a mean birth weight of 1441 ± 566 g, four neonatal deaths occurred. In addition, two neonates required prolonged mechanical ventilation, one of whom also developed necrotizing enterocolitis. Overall, therefore, seven out of 57 (12.3%) cases had an adverse perinatal outcome (95% CI, 3.8-20.8%). The ADC values in the frontal region were significantly lower in the group with adverse perinatal outcome vs those in the group with favorable outcome (mean values of both hemispheres, 1.68 vs 1.78 × 10-3 mm2 /s; P = 0.04). No significant difference in ADC values was observed between the two groups in any other cerebral territory. A cut-off value of 1.70 × 10-3 mm2 /s was associated with a sensitivity of 57% (95% CI, 18-90%), a specificity of 78% (95% CI, 63-88%), a positive predictive value of 27% (95% CI, 8-55%) and a negative predictive value of 93% (95% CI, 80-98%) for the prediction of adverse perinatal outcome. A mean frontal ADC value < 1.70 × 10-3 mm2 /s was not associated significantly with an increased risk of adverse perinatal outcome, either in the univariate analysis (P = 0.07), or when adjusting for gestational age at MRI and fetal sex (odds ratio (OR), 6.06 (95% CI, 0.9-37.1), P = 0.051) or for umbilical artery Doppler (OR, 6.08 (95% CI, 0.89-41.44)). CONCLUSION This first prospective, multicenter, cohort study using DWI in the setting of SGA found lower ADC values in the frontal white-matter territory in fetuses with, compared with those without, adverse perinatal outcome. To determine the prognostic value of these changes, further standardized evaluation of the neurodevelopment of children born with growth restriction is required. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- J M Jouannic
- Service de Médecine Foetale, Hôpital Armand Trousseau, Médecine Sorbonne Université, APHP, Paris, France
| | - E Blondiaux
- Service de Radiopédiatrie, Hôpital Armand Trousseau, Médecine Sorbonne Université, APHP, Paris, France
| | - M V Senat
- Service de Gynécologie-Obstétrique, Hôpital Bicêtre, Université Paris Sud, Le Kremlin-Bicêtre, France
| | - S Friszer
- Service de Médecine Foetale, Hôpital Armand Trousseau, Médecine Sorbonne Université, APHP, Paris, France
| | - C Adamsbaum
- Service de Radiopédiatrie, Hôpital Bicêtre, Université Paris Sud, Le Kremlin-Bicêtre, France
| | - J Rousseau
- Obstetrical, Perinatal, and Pediatric Epidemiology Team and Biostatistics Sorbonne Paris Cité Research Center (U1153), INSERM, Paris, France
- Université Paris Descartes, Paris, France
| | - P Hornoy
- Service de Radiologie, Hôpital Cochin, APHP, Paris, France
| | - A Letourneau
- Service de Gynécologie-Obstétrique, Hôpital Antoine Béclère, Université Paris Sud, APHP, Clamart, France
| | - J de Laveaucoupet
- Service de Radiologie, Hôpital Antoine Béclère, APHP, Clamart, France
| | - E Lecarpentier
- Maternité Port Royal, Hôpital Cochin, APHP, DHU Risques et Grossesse, Université Paris Descartes, Paris, France
| | - J Rosenblatt
- Service de Gynécologie-Obstétrique, Hôpital Robert Debré, APHP, Paris, France
| | - T Quibel
- Service de Gynécologie-Obstétrique, Centre Hospitalier Intercommunal, Poissy, France
| | - M Mollot
- Service de Radiologie, Centre Hospitalier Intercommunal, Poissy, France
| | - P Y Ancel
- Obstetrical, Perinatal, and Pediatric Epidemiology Team and Biostatistics Sorbonne Paris Cité Research Center (U1153), INSERM, Paris, France
| | - M Alison
- Service de Radiopédiatrie, Hôpital Robert Debré, APHP, Université Paris Diderot, Paris, France
| | - F Goffinet
- Obstetrical, Perinatal, and Pediatric Epidemiology Team and Biostatistics Sorbonne Paris Cité Research Center (U1153), INSERM, Paris, France
- Maternité Port Royal, Hôpital Cochin, APHP, DHU Risques et Grossesse, Université Paris Descartes, Paris, France
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Gary C, Briand A, Lespine A, Aho L, Jannic A, Rousseau J, Foucher L, Lilin T, Botterel F, Chosidow O, Guillot J, Bernigaud C. Efficacité d’une forte dose d’ivermectine et d’une dose unique de moxidectine dans un modèle porcin de gale. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.115] [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: 10/22/2022]
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Lebeau B, Bonne M, Comparot J, Rousseau J, Michelin L, Blin J, Brunet S. HDS of 4,6-dimethyldibenzothiophene over CoMoS supported mesoporous SiO2-TiO2 materials. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.02.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zwerling B, Rousseau J, Ward K, Lo A, Harken T. P39 Nurses experience of perinatal loss: A qualitative study on caring for patients undergoing labor induction for fetal demise or fetal anomalies. Contraception 2020. [DOI: 10.1016/j.contraception.2020.07.058] [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]
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Pascottini OB, Van Schyndel SJ, Spricigo JFW, Rousseau J, Weese JS, LeBlanc SJ. Dynamics of uterine microbiota in postpartum dairy cows with clinical or subclinical endometritis. Sci Rep 2020; 10:12353. [PMID: 32704012 PMCID: PMC7378066 DOI: 10.1038/s41598-020-69317-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [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: 05/13/2020] [Accepted: 07/09/2020] [Indexed: 12/22/2022] Open
Abstract
Our objectives were to describe and compare the uterine bacterial composition of postpartum Holstein cows diagnosed as healthy (n = 8), subclinical endometritis (SCE; n = 8), or clinical endometritis (CE; n = 5) in the fifth week postpartum. We did metagenomic analyses of 16S rRNA gene sequences from endometrial cytobrush samples at 10, 21, and 35 days in milk (DIM), and endometrial bacterial culture at 35 DIM. Uterine bacterial composition in healthy, SCE, and CE was stable at 10, 21, and 35 DIM. Alpha and beta diversities showed a different uterine microbiome from CE compared to healthy or SCE, but no differences were found between healthy and SCE cows. At the phylum level, the relative abundance of Bacteroidetes and Fusobacteria, and at genera level, of Trueperella was greater in CE than healthy or SCE cows. Trueperella pyogenes was the predominant bacteria cultured in cows with CE, and a wide variety of bacterial growth was found in healthy and SCE cows. Bacteria that grew in culture were represented within the most abundant bacterial genera based on metagenomic sequencing. The uterine microbiota was similar between SCE and healthy, but the microbiome in cows with CE had a loss of bacterial diversity.
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Affiliation(s)
- O Bogado Pascottini
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada.
| | - S J Van Schyndel
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - J F W Spricigo
- Department of Animal Biosciences, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - J Rousseau
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - J S Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - S J LeBlanc
- Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1, Canada
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Grobman WA, Sandoval G, Reddy UM, Tita AT, Silver RM, Mallett G, Hill K, Rice MM, El-Sayed YY, Wapner RJ, Rouse DJ, Saade GR, Thorp JM, Chauhan SP, Iams JD, Chien EK, Casey BM, Gibbs RS, Srinivas SK, Swamy GK, Simhan HN, Macones GA, Peaceman A, Plunkett B, Paycheck K, Dinsmoor M, Harris S, Sheppard J, Biggio J, Harper L, Longo S, Servay C, Varner M, Sowles A, Coleman K, Atkinson D, Stratford J, Dellermann S, Meadows C, Esplin S, Martin C, Peterson K, Stradling S, Willson C, Lyell D, Girsen A, Knapp R, Gyamfi C, Bousleiman S, Perez-Delboy A, Talucci M, Carmona V, Plante L, Tocci C, Leopanto B, Hoffman M, Dill-Grant L, Palomares K, Otarola S, Skupski D, Chan R, Allard D, Gelsomino T, Rousseau J, Beati L, Milano J, Werner E, Salazar A, Costantine M, Chiossi G, Pacheco L, Saad A, Munn M, Jain S, Clark S, Clark K, Boggess K, Timlin S, Eichelberger K, Moore A, Beamon C, Byers H, Ortiz F, Garcia L, Sibai B, Bartholomew A, Buhimschi C, Landon M, Johnson F, Webb L, McKenna D, Fennig K, Snow K, Habli M, McClellan M, Lindeman C, Dalton W, Hackney D, Cozart H, Mayle A, Mercer B, Moseley L, Gerald J, Fay-Randall L, Garcia M, Sias A, Price J, Hale K, Phipers J, Heyborne K, Craig J, Parry S, Sehdev H, Bishop T, Ferrara J, Bickus M, Caritis S, Thom E, Doherty L, de Voest J. Health resource utilization of labor induction versus expectant management. Am J Obstet Gynecol 2020; 222:369.e1-369.e11. [PMID: 31930993 DOI: 10.1016/j.ajog.2020.01.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/26/2019] [Accepted: 01/06/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Although induction of labor of low-risk nulliparous women at 39 weeks reduces the risk of cesarean delivery compared with expectant management, concern regarding more frequent use of labor induction remains, given that this intervention historically has been thought to incur greater resource utilization. OBJECTIVE The objective of the study was to determine whether planned elective labor induction at 39 weeks among low-risk nulliparous women, compared with expectant management, was associated with differences in health care resource utilization from the time of randomization through 8 weeks postpartum. STUDY DESIGN This is a planned secondary analysis of a multicenter randomized trial in which low-risk nulliparous women were assigned to induction of labor at 39 weeks or expectant management. We assessed resource utilization after randomization in 3 time periods: antepartum, delivery admission, and discharge through 8 weeks postpartum. RESULTS Of 6096 women with data available, those in the induction of labor group (n = 3059) were significantly less likely in the antepartum period after randomization to have at least 1 ambulatory visit for routine prenatal care (32.4% vs 68.4%), unanticipated care (0.5% vs 2.6%), or urgent care (16.2% vs 44.3%), or at least 1 antepartum hospitalization (0.8% vs 2.2%, P < .001 for all). They also had fewer tests (eg, sonograms, blood tests) and treatments (eg, antibiotics, intravenous hydration) prior to delivery. During the delivery admission, women in the induction of labor group spent a longer time in labor and delivery (median, 0.83 vs 0.57 days), but both women (P = .002) and their neonates (P < .001) had shorter postpartum stays. Women and neonates in both groups had similar frequencies of postpartum urgent care and hospital readmissions (P > .05 for all). CONCLUSION Women randomized to induction of labor had longer durations in labor and delivery but significantly fewer antepartum visits, tests, and treatments and shorter maternal and neonatal hospital durations after delivery. These results demonstrate that the health outcome advantages associated with induction of labor are gained without incurring uniformly greater health care resource use.
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Ybazeta G, Murad Y, Perez J, Lefebvre S, Weese S, Rousseau J, Diaz-Mitoma F, Tilbe K, Nokhbeh R. A159 EMERGING THEMES AND THE OLD TALE OF C. DIFFICILE INFECTION: GENETICS, RESERVOIRS, TREATMENT AND MANAGEMENT. J Can Assoc Gastroenterol 2019. [DOI: 10.1093/jcag/gwz006.158] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- G Ybazeta
- Research, Health Sciences North Research Institute, Sudbury, ON, Canada
| | - Y Murad
- Northern Ontario School of Medicine (NOSM), Sudbury, ON, Canada
| | - J Perez
- University of Ottawa, Ottawa, ON, Canada
| | - S Lefebvre
- Research, Health Sciences North Research Institute, Sudbury, ON, Canada
| | - S Weese
- University of Guelph, Guelph, ON, Canada
| | - J Rousseau
- University of Guelph, Guelph, ON, Canada
| | | | - K Tilbe
- Health Sciences North, Sudbury, ON, Canada
| | - R Nokhbeh
- Research, Health Sciences North Research Institute, Sudbury, ON, Canada
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Gao F, Ieritano C, Chen KT, Dias GM, Rousseau J, Bénard F, Seimbille Y. Two bifunctional desferrioxamine chelators for bioorthogonal labeling of biovectors with zirconium-89. Org Biomol Chem 2019; 16:5102-5106. [PMID: 29974105 DOI: 10.1039/c8ob01434e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report two bifunctional chelators, DFO-Cys and DFO-CBT, to label biovectors with zirconium-89 according to the 2-cyanobenzothiazole/1,2-aminothiol cycloaddition. Their features are high labeling yields, rapid and efficient bioconjugation, metabolically stable luciferin-based end products, and applicability to orthogonal two-step labeling of sensitive biomolecules.
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Affiliation(s)
- F Gao
- TRIUMF, Life Sciences Division, 4004 Westbrook Mall, Vancouver, V6T 2A3, BC, Canada.
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Mallia G, Van Toen J, Rousseau J, Jacob L, Boerlin P, Greer A, Metcalf D, Weese J. Examining the epidemiology and microbiology of Clostridium difficile carriage in elderly patients and residents of a healthcare facility in southern Ontario, Canada. J Hosp Infect 2018; 99:461-468. [DOI: 10.1016/j.jhin.2018.01.020] [Citation(s) in RCA: 5] [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] [Received: 12/19/2017] [Accepted: 01/27/2018] [Indexed: 11/28/2022]
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Lapierre N, Neubauer N, Miguel-Cruz A, Rincon AR, Liu L, Rousseau J. Erratum to 'The state of knowledge on technologies and their use for fall detection: A scoping review' [Int. J. Med. Inform. 111 (2018) 58-71]. Int J Med Inform 2018; 116:9. [PMID: 29887236 DOI: 10.1016/j.ijmedinf.2018.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- N Lapierre
- Faculty of Medicine, Université de Montréal, C.P. 6128 Centre-ville, Montréal, Québec, H3C 3J7, Canada; Research Center, Institut universitaire de gériatrie de Montréal (Pavillon André-Roch Lecours), 4565 chemin Queen-Mary, Montréal, Québec, H3W 1W5, Canada
| | - N Neubauer
- Department of Occupational Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 2-64 Corbett Hall, Edmonton, AB, T6G 2G4, Canada
| | - A Miguel-Cruz
- Department of Occupational Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 2-64 Corbett Hall, Edmonton, AB, T6G 2G4, Canada; School of Medicine and Health Sciences, Universidad del Rosario, Calle 63D # 24-31, 7 de Agosto, Bogotá D.C, Colombia, Colombia
| | - A Rios Rincon
- Department of Occupational Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 2-64 Corbett Hall, Edmonton, AB, T6G 2G4, Canada; School of Medicine and Health Sciences, Universidad del Rosario, Calle 63D # 24-31, 7 de Agosto, Bogotá D.C, Colombia, Colombia
| | - L Liu
- Department of Occupational Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 2-64 Corbett Hall, Edmonton, AB, T6G 2G4, Canada
| | - J Rousseau
- Research Center, Institut universitaire de gériatrie de Montréal (Pavillon André-Roch Lecours), 4565 chemin Queen-Mary, Montréal, Québec, H3W 1W5, Canada; Faculty of Medicine, Université de Montréal, School of Rehabilitation, Site Pavillon Parc, C.P. 6128 Centre-ville, Montréal, Québec, H3C 3J7, Canada.
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Affiliation(s)
- D T Frazier
- Department of Econometrics and Business Statistics, Monash University, Scenic Boulevard, Clayton, Victoria, Australia
| | - G M Martin
- Department of Econometrics and Business Statistics, Monash University, Scenic Boulevard, Clayton, Victoria, Australia
| | - C P Robert
- Université Paris Dauphine, Place du Maréchal de Lattre de Tassigny, Paris cedex 16, France
| | - J Rousseau
- Department of Statistics, University of Oxford, 24–29 St Giles’, Oxford, U.K
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21
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Lapierre N, Neubauer N, Miguel-Cruz A, Rios Rincon A, Liu L, Rousseau J. The state of knowledge on technologies and their use for fall detection: A scoping review. Int J Med Inform 2018; 111:58-71. [DOI: 10.1016/j.ijmedinf.2017.12.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 12/06/2017] [Accepted: 12/20/2017] [Indexed: 01/23/2023]
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22
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Torchin H, Rousseau J, Marchand-Martin L, Truffert P, Jarreau PH, Ancel PY. Palivizumab administration in preterm infants in France: EPIPAGE-2 cohort study. Arch Pediatr 2018; 25:89-94. [PMID: 29395887 DOI: 10.1016/j.arcped.2017.12.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 11/21/2017] [Accepted: 12/14/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Several countries, including France, have restricted the indications for monoclonal antibodies directed against respiratory syncytial virus (RSV) compared to the marketing authorization (MA). No new data concerning use of palivizumab on a national scale have been published since the 2007 update of the national guidelines. OBJECTIVES To describe palivizumab administration for RSV prophylaxis during the first RSV season in infants born prematurely in France in 2011. METHODS Infants from the national population-based cohort EPIPAGE-2 born at≤34 weeks' gestation, discharged home before 31 March 2012 and followed-up at 1year were included. The RSV season ran from 1 October 2011 to 31 March 2012. Prophylaxis was deemed "initiated" if the infant had received at least one dose of palivizumab during this period and "complete" if it had received at least five doses or as many doses as the number of exposed months. The reference documents were the MA and French Transparency Committee guidelines (TC). RESULTS Prophylaxis was indicated in 3586 of 3608 infants (99.7%) according to the MA and 1315 of 3608 (16.7%) according to the TC. A total of 1906 infants (26.6%) received at least one dose of palivizumab. The overall rate of conformity with TC indications was 85%, but was lower for infants born at 27-32 weeks' gestation. The rate of complete prophylaxis was 77.2%. The factors associated with prophylaxis initiation were low gestational age, low birthweight, high maternal educational level, type of neonatal unit, and date at discharge. Factors associated with complete prophylaxis were respiratory impairment, high educational level, and characteristics related to living conditions (absence of siblings at home, type of childcare). CONCLUSIONS Palivizumab administration in France generally conformed with TC guidelines, but could be further improved for infants born at 27-32 weeks' gestation without bronchopulmonary dysplasia.
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Affiliation(s)
- H Torchin
- Inserm U1153, Obstetric, Perinatal and Paediatric Epidemiology, Sorbonne Paris cité, "Risks in pregnancy" University Hospital Department, 75014 Paris, France; Université Paris Descartes, 75006 Paris, France; Department of Neonatal Medicine, Cochin-Port Royal Hospital, AP-HP, 75014 Paris, France.
| | - J Rousseau
- Inserm U1153, Obstetric, Perinatal and Paediatric Epidemiology, Sorbonne Paris cité, "Risks in pregnancy" University Hospital Department, 75014 Paris, France
| | - L Marchand-Martin
- Inserm U1153, Obstetric, Perinatal and Paediatric Epidemiology, Sorbonne Paris cité, "Risks in pregnancy" University Hospital Department, 75014 Paris, France
| | - P Truffert
- Department of neonatology, Jeanne-de-Flandre Hospital, CHRU Lille, 59037 Lille cedex, France
| | - P-H Jarreau
- Inserm U1153, Obstetric, Perinatal and Paediatric Epidemiology, Sorbonne Paris cité, "Risks in pregnancy" University Hospital Department, 75014 Paris, France; Université Paris Descartes, 75006 Paris, France; Department of Neonatal Medicine, Cochin-Port Royal Hospital, AP-HP, 75014 Paris, France
| | - P-Y Ancel
- Inserm U1153, Obstetric, Perinatal and Paediatric Epidemiology, Sorbonne Paris cité, "Risks in pregnancy" University Hospital Department, 75014 Paris, France; Université Paris Descartes, 75006 Paris, France; URC-CIC P1419, Cochin-Port Royal Hospital, AP-HP, F-75014 Paris, France
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23
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Rousseau J, Chu C, Guitard P. HOME ASSESSMENT OF PERSON-ENVIRONMENT INTERACTION (HOPE): A CROSS-CULTURAL VALIDATION STUDY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1237] [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: 11/12/2022] Open
Affiliation(s)
- J. Rousseau
- École de Réadaptation/School of Rehabilitation, Université de Montréal, Montreal, Quebec, Canada,
- Research Center Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada
,
| | - C. Chu
- CIUSSS de l’Est-de-Montréal, Montreal, Quebec, Canada,
| | - P. Guitard
- École des Sciences de la Réadaptation /School of Rehabilitation Sciences, Université d’Ottawa / University of Ottawa, Ottawa, Ontario, Canada
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Bourbonnais A, Rousseau J, Meunier J, Gagnon M, Lalonde M, Lapierre N, Trudeau D. BEHAVIORAL SYMPTOMS AND FALLS IN LONG-TERM CARE FACILITIES: PERCEPTIONS OF GERONTECHNOLOGY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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)
- A. Bourbonnais
- Université de Montréal, Montreal, Quebec, Canada,
- Research Centre of the Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada,
| | - J. Rousseau
- Université de Montréal, Montreal, Quebec, Canada,
- Research Centre of the Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada,
| | - J. Meunier
- Université de Montréal, Montreal, Quebec, Canada,
| | - M. Gagnon
- Université Laval, Quebec, Quebec, Canada,
| | - M. Lalonde
- Université de Montréal, Montreal, Quebec, Canada,
- Research Centre of the Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada,
| | - N. Lapierre
- Université de Montréal, Montreal, Quebec, Canada,
- Research Centre of the Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada,
| | - D. Trudeau
- Centre Intégré des Services de Santé et Services Sociaux du Centre-Sud-de-l’Île-de-Montréal, Montreal, Quebec, Canada
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Ouellet DL, Cherif K, Rousseau J, Tremblay JP. Deletion of the GAA repeats from the human frataxin gene using the CRISPR-Cas9 system in YG8R-derived cells and mouse models of Friedreich ataxia. Gene Ther 2017; 24:265-274. [PMID: 28024081 DOI: 10.1038/gt.2016.89] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 12/19/2016] [Indexed: 02/07/2023]
Abstract
The Friedreich ataxia is a monogenic disease due to a hyperexpanded GAA triplet located within the first intron of the frataxin gene that causes transcriptional issues. The resulting frataxin protein deficiency leads to a Fe-S cluster biosynthesis dysfunction in the mitochondria and to oxidative stress and cell death. Here we use the CRISPR-Cas9 system to remove the mutated GAA expansion and restore the frataxin gene transcriptional activity and protein level. Both YG8R and YG8sR mouse models and cell lines derived from these mice were used to CRISPR-edited successfully the GAA expansion in vitro and in vivo. Nevertheless, our results suggest the YG8sR as a better and more suitable model for the study of the CRISPR-Cas9 edition of the mutated frataxin gene.
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Affiliation(s)
- D L Ouellet
- Centre de Recherche, Centre Hospitalier, Universitaire de Québec, Quebec City, QC, Canada
- Département de Médecine Moléculaire, Faculté de Médecine, CHU de Québec, Université Laval, Québec City, QC, Canada
| | - K Cherif
- Centre de Recherche, Centre Hospitalier, Universitaire de Québec, Quebec City, QC, Canada
- Département de Médecine Moléculaire, Faculté de Médecine, CHU de Québec, Université Laval, Québec City, QC, Canada
| | - J Rousseau
- Centre de Recherche, Centre Hospitalier, Universitaire de Québec, Quebec City, QC, Canada
- Département de Médecine Moléculaire, Faculté de Médecine, CHU de Québec, Université Laval, Québec City, QC, Canada
| | - J P Tremblay
- Centre de Recherche, Centre Hospitalier, Universitaire de Québec, Quebec City, QC, Canada
- Département de Médecine Moléculaire, Faculté de Médecine, CHU de Québec, Université Laval, Québec City, QC, Canada
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26
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Chapdelaine P, Gérard C, Sanchez N, Cherif K, Rousseau J, Ouellet DL, Jauvin D, Tremblay JP. Development of an AAV9 coding for a 3XFLAG-TALEfrat#8-VP64 able to increase in vivo the human frataxin in YG8R mice. Gene Ther 2016; 23:606-14. [PMID: 27082765 PMCID: PMC4940929 DOI: 10.1038/gt.2016.36] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Revised: 03/09/2016] [Accepted: 04/07/2016] [Indexed: 02/07/2023]
Abstract
Artificially designed transcription activator-like effector (TALE) proteins fused to a transcription activation domain (TAD), such as VP64, are able to activate specific eukaryotic promoters. They thus provide a good tool for targeted gene regulation as a therapy. However, the efficacy of such an agent in vivo remains to be demonstrated as the majority of studies have been carried out in cell culture. We produced an adeno-associated virus 9 (AAV9) coding for a TALEfrat#8 containing 13 repeat variable diresidues able to bind to the proximal promoter of human frataxin (FXN) gene. This TALEfrat#8 was fused with a 3XFLAG at its N terminal and a VP64 TAD at its C terminal, and driven by a CAG promoter. This AAV9_3XFLAG-TALEfrat#8-VP64 was injected intraperitoneally to 9-day-old and 4-month-old YG8R mice. After 1 month, the heart, muscle and liver were removed and their FXN mRNA and FXN protein were analyzed. The results show that the AAV9_3XFLAG-TALEfrat#8-VP64 increased the FXN mRNA and FXN protein in the three organs studied. These results corroborate our previous in vitro studies in the FRDA human fibroblasts. Our study indicates that an AAV coding for a TALE protein coupled with a TAD may be used to increase gene expression in vivo as a possible treatment not only for FRDA but also for other haploinsufficiency diseases.
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Affiliation(s)
- P Chapdelaine
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - C Gérard
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - N Sanchez
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - K Cherif
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - J Rousseau
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - D L Ouellet
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - D Jauvin
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
| | - J P Tremblay
- Unité de Génétique Humaine, Axe Neurosciences, Centre de Recherche du Centre Hospitalier de Universitaire de Québec-Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Faculty of Medicine, Laval University, Quebec City, QC, Canada
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Bailey K, Symes S, Mackin K, Rousseau J, Lyras D, Weese J, Axon J, Russell C, Hartley C, Browning G, Gilkerson J. Detection and characterisation of Clostridium difficile in Australian Thoroughbred foals. J Equine Vet Sci 2016. [DOI: 10.1016/j.jevs.2016.02.051] [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: 11/16/2022]
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Rousseau J, Migonney V, Vermandel M. Décès d'Yves Moschetto, fondateur de la revue ITBM. Ing Rech Biomed 2015. [DOI: 10.1016/j.irbm.2015.07.002] [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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Huclier-Markai S, Alliot C, Rousseau J, Chouin N, Fani M, Bouziotis P, Maina T, Cutler C, Barbet J. Promising prospects of 44mSc/44Sc as an in vivo generator: Biological evaluation and PET images. Nucl Med Biol 2014. [DOI: 10.1016/j.nucmedbio.2014.05.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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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Uppugunduri CRS, Rezgui MA, Diaz PH, Tyagi AK, Rousseau J, Daali Y, Duval M, Bittencourt H, Krajinovic M, Ansari M. The association of cytochrome P450 genetic polymorphisms with sulfolane formation and the efficacy of a busulfan-based conditioning regimen in pediatric patients undergoing hematopoietic stem cell transplantation. Pharmacogenomics J 2013; 14:263-71. [PMID: 24165757 DOI: 10.1038/tpj.2013.38] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/06/2013] [Accepted: 09/09/2013] [Indexed: 11/09/2022]
Abstract
Cytochrome P450 enzymes (CYPs) and flavin-containing monooxygenases (FMOs) likely have a role in the oxidation of intermediate metabolites of busulfan (Bu). In vitro studies to investigate the involvement of these enzymes are cumbersome because of the volatile nature of the intermediate metabolite tetrahydrothiophene (THT) and the lack of sensitive quantitation methods. This study explored the association between the CYP2C9, CYP2C19, CYP2B6 and FMO3 genotypes and sulfolane (Su, a water soluble metabolite of Bu) plasma levels in children undergoing hematopoietic stem cell transplantation (HSCT). The relationship between these genotypes and the effectiveness of myeloablative conditioning was also analyzed. Sixty-six children receiving an intravenous Bu-based myeloablative conditioning regimen were genotyped for common functional variant alleles in CYP2C9 (*2 and *3), CYP2C19 (*2 and *17), FMO3 (rs2266780, rs2266782 and rs1736557) and CYP2B6 (*5 and *9). The plasma levels of Bu and its metabolite Su were measured after the ninth Bu dose in a subset of 44 patients for whom plasma samples were available. The ratio of Bu to Su was considered the metabolic ratio (MR) and was compared across the genotype groups. Higher MRs were observed in CYP2C9*2 and *3 allele carriers (mean±s.d.: 7.8±3.6 in carriers vs 4.4±2.2 in non-carriers; P=0.003). An increased incidence of graft failure was observed among patients with an MR>5 compared with those with MR values <5 (20% vs 0%; P=0.02). In contrast, a significantly higher incidence of relapse and graft failure (evaluated as event-free survival) was observed in patients with malignant disease who carried CYP2B6 alleles with reduced function on both chromosomes compared with carriers of at least one normal allele (100% vs 40%; P=0.0001). These results suggest that CYP2C9 has a role in the oxidation reactions of THT and indicate that it may be possible to predict the efficacy of Bu-based myeloablative conditioning before HSCT on the basis of CYP genotypes and Bu MRs.
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Affiliation(s)
- C R S Uppugunduri
- 1] Department of Pediatrics, Onco-Hematology unit, University Hospital of Geneva, Geneva, Switzerland [2] CANSEARCH Research Laboratory, Geneva Medical University, Geneva, Switzerland
| | - M A Rezgui
- Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada
| | - P H Diaz
- 1] Department of Pediatrics, Onco-Hematology unit, University Hospital of Geneva, Geneva, Switzerland [2] CANSEARCH Research Laboratory, Geneva Medical University, Geneva, Switzerland
| | - A K Tyagi
- 1] Department of Pediatrics, Onco-Hematology unit, University Hospital of Geneva, Geneva, Switzerland [2] CANSEARCH Research Laboratory, Geneva Medical University, Geneva, Switzerland
| | - J Rousseau
- Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada
| | - Y Daali
- 1] CANSEARCH Research Laboratory, Geneva Medical University, Geneva, Switzerland [2] Department of Clinical Pharmacology and Toxicology, Geneva University Hospitals, Geneva, Switzerland
| | - M Duval
- 1] Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada [2] Department of Pediatrics, Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada
| | - H Bittencourt
- 1] Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada [2] Department of Pediatrics, Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada
| | - M Krajinovic
- 1] Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada [2] Department of Pediatrics, Charles-Bruneau Cancer Center, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada [3] Department of Pharmacology, University of Montreal, Montreal, Quebec, Canada
| | - M Ansari
- 1] Department of Pediatrics, Onco-Hematology unit, University Hospital of Geneva, Geneva, Switzerland [2] CANSEARCH Research Laboratory, Geneva Medical University, Geneva, Switzerland
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Khumalo NP, Mkentane K, Muthukarapan C, Hardie D, Korsman S, Hu N, Mthebe T, Davids LM, Rousseau J. Invisible bleeding from clean-shave haircuts: detection with blood specific RNA markers. Dermatology 2013; 227:197-201. [PMID: 24135308 DOI: 10.1159/000353529] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 06/04/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND 'Haircut-associated bleeding' is a newly recognized entity that affects at least a quarter of African men who wear shiny clean-shave ('chiskop') haircuts. AIM This pilot study aimed to elucidate whether invisible haircut-associated bleeding was detectable using blood specific RNA markers (16 participants, 5 with unknown HIV status) and whether surface virus could be detected using PCR from scalp swabs (of 11 known HIV-positive participants). METHODS Haircuts were performed professionally and scalps examined by a dermatologist to exclude injury. Serum samples for viral loads were also collected at the same time. RESULTS In all, 6/16 (37%) samples tested positive (>100 relative fluorescent units) for hemoglobin beta and albumin, confirming evidence of blood; of these, only 1/11 was HIV-positive but had an undetectable serum viral load. No surface HIV was detected from any scalp samples. CONCLUSIONS This study confirms the entity of haircut-associated bleeding but goes further to show for the first time that invisible bleeding from clean-shave haircuts is also common. Both a high serum viral load and evidence of bleeding should ideally be present prior to surface HIV detection. Future investigations for potential HIV (and hepatitis B) transmission through clean-shave haircuts are warranted but should not delay public education for disease prevention.
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Affiliation(s)
- N P Khumalo
- Division of Dermatology, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa
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Uppugunduri C, Daali Y, Rezgui M, Huezo Diaz P, Tyagi A, Rousseau J, Duval M, Bittencourt H, Krajinovic M, Ansari M. PP121—CYP2C9 genotypes associated with higher sulfolane levels in children receiving intravenous busulfan prior to hematopoietic stem cell transplantation. Clin Ther 2013. [DOI: 10.1016/j.clinthera.2013.07.144] [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: 10/26/2022]
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Stull J, Slavić D, Rousseau J, Weese J. Staphylococcus delphini and Methicillin-Resistant Staphylococcus pseudintermedius in Horses at a Veterinary Teaching Hospital. J Equine Vet Sci 2012. [DOI: 10.1016/j.jevs.2012.08.019] [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: 11/26/2022]
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Pouliot S, Levesque P, Rousseau J, Simard M, Candas B, Jobin G. Événements indésirables liés aux endoscopies via des données médico-administratives, Québec Canada. Rev Epidemiol Sante Publique 2012. [DOI: 10.1016/j.respe.2012.06.129] [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: 10/28/2022] Open
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Seimbille Y, Rousseau J, Bénard F, Ali H, Van Lier JE. Synthesis of 2, 16α- and 4, 16α-[16α-18F]difluoroestradiols and their 11β-methoxy derivatives for estrogen receptor imaging. J Labelled Comp Radiopharm 2012. [DOI: 10.1002/jlcr.25804401122] [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] [Indexed: 11/06/2022]
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Charest M, Sirois C, Cartier Y, Rousseau J. Infected tracheal diverticulum mimicking an aggressive mediastinal lesion on FDG PET/CT: an interesting case with review of the literature. Br J Radiol 2012; 85:e17-21. [PMID: 22190757 DOI: 10.1259/bjr/32814390] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The differential diagnosis for intense hypermetabolic mediastinal lesions on positron emission tomography (PET) could benefit from the combined morphological and metabolic information present in a fluorodeoxyglucose (FDG) PET/CT study. We report a case of an infected tracheal diverticulum mimicking an FDG-avid malignancy in a patient with a history of chronic lymphoproliferative disease. We review the literature for a systematic approach in the differential diagnosis of cystic mediastinal lesions. The embryological development of the normal tracheobronchial tree is reviewed, followed by a presentation of various congenital and acquired mediastinal lesions. The characteristic CT findings are described for each lesion and the avidity for FDG on PET is mentioned when references are available. This case emphasises that complicated benign processes should be considered in the differential diagnosis of an FDG-avid mediastinal lesion, even in subgroups of patients with significant risk factors for malignancy.
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Affiliation(s)
- M Charest
- Nuclear Medicine Service, Hopital du Sacre-Coeur de Montreal, Montreal, QC, Canada.
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Ansari M, Sauty G, Labuda M, Gagné V, Rousseau J, Moghrabi A, Laverdière C, Sinnett D, Krajinovic M. Polymorphism in multidrug resistance-associated protein gene 3 is associated with outcomes in childhood acute lymphoblastic leukemia. Pharmacogenomics J 2011; 12:386-94. [DOI: 10.1038/tpj.2011.17] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Elleaume H, Rousseau J, Adam JF, Estève F. Commentaires critiques sur la revue intitulée « Aspects radiobiologiques des traitements anticancéreux par rayonnement synchrotron : bilan et perspectives ». Cancer Radiother 2011; 15:161-4; author reply 164-7. [DOI: 10.1016/j.canrad.2010.07.637] [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] [Received: 05/05/2010] [Accepted: 07/20/2010] [Indexed: 10/18/2022]
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Firstenberg M, Rousseau J, Kalbfleisch S, Houmsse M, Augostini R, Hummel J, Higgins R, Daoud E, Crestanello J, Sudhakar CS, Sirak J, Love C. OP-007: INCIDENCE AND OUTCOMES OF EMERGENT CARDIOVASCULAR SURGERY FOLLOWING MAJOR COMPLICATIONS DURING ELECTROPHYSIOLOGY PROCEDURES. Int J Cardiol 2011. [DOI: 10.1016/s0167-5273(11)70118-8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rehan MM, Rousseau J, Gong X, Guillaumat L, Ali J. Effects of fiber orientation of adjacent plies on the mode I crack propagation in a carbon-epoxy laminates. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.proeng.2011.04.525] [Citation(s) in RCA: 22] [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: 11/15/2022]
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Abstract
Mutations in Duchenne muscular dystrophy (DMD) are either inducing a nonsense codon or a frameshift. Meganucleases (MGNs) can be engineered to induce double-strand breaks (DSBs) at specific DNA sequences. These breaks are repaired by homologous recombination or by non-homologous end joining (NHEJ), which results in insertions or deletions (indels) of a few base pairs. To verify whether MGNs could be used to restore the normal reading frame of a dystrophin gene with a frameshift mutation, we inserted in a plasmid coding for the dog micro-dystrophin sequences containing a MGN target. The number of base pairs in these inserted sequences changed the reading frame. One of these modified target micro-dystrophin plasmids and an appropriate MGN were then transfected in 293FT cells. The MGN induced micro-deletion or micro-insertion in the micro-dystrophin that restored dystrophin expression. MGNs also restored micro-dystrophin expression in myoblasts in vitro and in muscle fibers in vivo. The mutation of the targeted micro-dystrophin was confirmed by PCR amplification followed by digestion with the Surveyor enzyme and by cloning and sequencing of the amplicons. These experiments are thus a proof of principle that MGNs that are adequately engineered to target appropriate sequences in the human dystrophin gene should be able to restore the normal reading frame of that gene in DMD patients with an out-of-frame deletion. New MGNs engineered to target a sequence including or near nonsense mutation could also be used to delete it.
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Nunes JM, Riccio ME, Buhler S, Di D, Currat M, Ries F, Almada AJ, Benhamamouch S, Benitez O, Canossi A, Fadhlaoui-Zid K, Fischer G, Kervaire B, Loiseau P, de Oliveira DCM, Papasteriades C, Piancatelli D, Rahal M, Richard L, Romero M, Rousseau J, Spiroski M, Sulcebe G, Middleton D, Tiercy JM, Sanchez-Mazas A. Analysis of the HLA population data (AHPD) submitted to the 15th International Histocompatibility/Immunogenetics Workshop by using the Gene[rate] computer tools accommodating ambiguous data (AHPD project report). ACTA ACUST UNITED AC 2010; 76:18-30. [PMID: 20331842 DOI: 10.1111/j.1399-0039.2010.01469.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
During the 15th International Histocompatibility and Immunogenetics Workshop (IHIWS), 14 human leukocyte antigen (HLA) laboratories participated in the Analysis of HLA Population Data (AHPD) project where 18 new population samples were analyzed statistically and compared with data available from previous workshops. To that aim, an original methodology was developed and used (i) to estimate frequencies by taking into account ambiguous genotypic data, (ii) to test for Hardy-Weinberg equilibrium (HWE) by using a nested likelihood ratio test involving a parameter accounting for HWE deviations, (iii) to test for selective neutrality by using a resampling algorithm, and (iv) to provide explicit graphical representations including allele frequencies and basic statistics for each series of data. A total of 66 data series (1-7 loci per population) were analyzed with this standard approach. Frequency estimates were compliant with HWE in all but one population of mixed stem cell donors. Neutrality testing confirmed the observation of heterozygote excess at all HLA loci, although a significant deviation was established in only a few cases. Population comparisons showed that HLA genetic patterns were mostly shaped by geographic and/or linguistic differentiations in Africa and Europe, but not in America where both genetic drift in isolated populations and gene flow in admixed populations led to a more complex genetic structure. Overall, a fruitful collaboration between HLA typing laboratories and population geneticists allowed finding useful solutions to the problem of estimating gene frequencies and testing basic population diversity statistics on highly complex HLA data (high numbers of alleles and ambiguities), with promising applications in either anthropological, epidemiological, or transplantation studies.
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Affiliation(s)
- J M Nunes
- Laboratory of Anthropology, Genetics and Peopling History (AGP Lab), University of Geneva, Geneva, Switzerland
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Rousseau J, Escriou V, Perrot P, Picarda G, Charrier C, Scherman D, Heymann D, Rédini F, Trichet V. Advantages of bioluminescence imaging to follow siRNA or chemotherapeutic treatments in osteosarcoma preclinical models. Cancer Gene Ther 2010; 17:387-97. [DOI: 10.1038/cgt.2009.89] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
REASONS FOR PERFORMING STUDY Methicillin-resistant Staphylococcus aureus (MRSA) is an emerging equine and zoonotic pathogen. Infection control protocols can be used to control MRSA in human hospitals, but measures to eradicate MRSA on horse farms have not been evaluated. OBJECTIVES To describe an MRSA eradication programme that was used to attempt to eliminate MRSA colonisation among horses and horse personnel on 2 equine farms. METHODS Active surveillance cultures and infection control protocols were implemented on 2 farms with endemic MRSA. RESULTS Active screening and strict implementation of infection control protocols resulted in a rapid decrease in number of colonised horses on both farms. The majority of horses eliminated MRSA without antimicrobial treatment. On one farm colonisation was eradicated, while only 2 (3%) colonised horses remained on the other farm at the end of the study. CONCLUSIONS Although at this stage the benefit of eradication of MRSA from populations of horses and cost-benefit studies have not been established, this study illustrates that short-term eradication can be achieved with a policy of segregation, enhanced infection control precautions and repeated testing of groups of animals. POTENTIAL RELEVANCE Infection control practices should form the basis of MRSA control. Antimicrobial therapy does not appear to be required for eradication of MRSA colonisation in horses and control of MRSA on farms. In appropriate circumstances, these methods may be useful for controlling the spread of this potentially serious pathogen.
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Affiliation(s)
- J S Weese
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
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Guerini H, Ayral X, Campagna R, Feydy A, Pluot E, Rousseau J, Gossec L, Chevrot A, Dougados M, Drapé JL. Comment je fais un bilan échographique des mains et des pieds dans la polyarthrite rhumatoïde ? ACTA ACUST UNITED AC 2010; 91:99-110. [DOI: 10.1016/s0221-0363(10)70015-9] [Citation(s) in RCA: 9] [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: 11/30/2022]
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Betrouni N, Lopes R, Makni N, Dewalle AS, Vermandel M, Rousseau J. Volume quantification by fuzzy logic modelling in freehand ultrasound imaging. Ultrasonics 2009; 49:646-652. [PMID: 19409591 DOI: 10.1016/j.ultras.2009.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 03/23/2009] [Accepted: 03/28/2009] [Indexed: 05/27/2023]
Abstract
INTRODUCTION Many algorithms exist for 3D reconstruction of data from freehand 2D ultrasound slices. These methods are based on interpolation techniques to fill the voxels from the pixels. For quantification purposes, segmentation is involved to delineate the structure of interest. However, speckle and partial volume effect errors can affect quantification. OBJECTIVE This study aimed to assess the effect of the combination of a fuzzy model and 3D reconstruction algorithms of freehand ultrasound images on these errors. METHODS We introduced a fuzzification step to correct the initial segmentation, by weighting the pixels by a distribution function, taking into account the local gray levels, the orientation of the local gradient, and the local contrast-to-noise ratio. We then used two of the most wide-spread reconstruction algorithms (pixel nearest neighbour (PNN) and voxel nearest neighbour (VNN)) to interpolate and create the volume of the structure. Finally, defuzzification was used to estimate the optimal volume. VALIDATION B-scans were acquired using 5 MHz and 8 MHz ultrasound probes on ultrasound tissue-mimicking phantoms. Quantitative evaluation of the reconstructed structures was done by comparing the method output to the real volumes. Comparison was also done with classical PNN and VNN algorithms. RESULTS With the fuzzy model quantification errors were less than 4.3%, whereas with classical algorithms, errors were larger (10.3% using PNN, 17.2% using VNN). Furthermore, for very small structures (0.5 cm(3)), errors reached 24.3% using the classical VNN algorithm, while they were about 9.6% with the fuzzy VNN model. CONCLUSION These experiments prove that the fuzzy model allows volumes to be determined with better accuracy and reproducibility, especially for small structures (<3 cm(3)).
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Affiliation(s)
- N Betrouni
- INSERM U703, Pavillon Vancostanobel, University Hospital of Lille (CHRU), Lille 59037, France.
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