31 results on '"Butel, P."'
Search Results
2. Association between gut microbiota at 3.5 years of age and body mass index at 5 years: results from two French nationwide birth cohorts
- Author
-
Toubon, Gaël, Butel, Marie-José, Rozé, Jean-Christophe, Delannoy, Johanne, Ancel, Pierre-Yves, Aires, Julio, and Charles, Marie-Aline
- Published
- 2024
- Full Text
- View/download PDF
3. Disseminated tuberculosis, CMV viraemia & haemophagocytic-lymphohistiocystosis syndrome in an adult patient with anti- IFNγ autoantibodies – case report and brief review
- Author
-
G.I. Butel-Simoes, C. Kiss, K. Kong, L.B. Rosen, L.M. Hosking, S. Barnes, G.A. Jenkin, S. Megaloudis, B. Kumar, S.M. Holland, and S. Ojaimi
- Subjects
Anti-interferon gamma autoantibodies ,Tuberculosis ,Haemophagocytic lymphohistiocytosis ,Immunologic diseases. Allergy ,RC581-607 - Abstract
We report a case of an adult female with disseminated tuberculosis, cytomegalovirus viraemia and haemophagocytic-lymphohistiocystosis syndrome associated with neutralizing anti- interferon gamma (IFNγ) autoantibodies demonstrated by absent IFNγ stimulated STAT1 phosphorylation in the presence of patient sera. A brief review of immunodeficiency caused by anti-IFNγ autoantibodies is also described.
- Published
- 2023
- Full Text
- View/download PDF
4. Neuro-Ophthalmic Dengue Infection: A Case Report with a Multiple Body Site Sampling Strategy and Review of Laboratory Data
- Author
-
Grace I. Butel-Simoes, Nupur Bajaj, Sultan Asad, Jean Moselen, Nicole Orlando, Eike Steinig, Thomas Tran, Julian Druce, Leon Caly, Emma Bishop, Chanad Harangozo, and Chuan Kok Lim
- Subjects
dengue virus ,mosquito-borne encephalitis ,uveitis ,optic neuropathy ,neuropathogenic virus ,Microbiology ,QR1-502 - Abstract
Dengue neurological disease is an uncommon yet severe complication of dengue infection. It can manifest as encephalitis, encephalopathy, neuro-ophthalmic complications, or neuromuscular disorders. Severe infection can result in viral shedding across multiple body sites. We describe a case of severe neuro-ophthalmic dengue infection in an otherwise healthy returned traveller, presenting with prolonged multiple-body-site viral detections by PCR. The dengue virus (DENV) dynamics and serological response support a direct DENV neuropathogenicity. A retrospective review of the laboratory data at the Victorian Infectious Diseases Reference Laboratory (VIDRL) suggests that blood is the most frequent sample type with DENV detection (92% of all DENV-positive samples). Genotype variation is seen across different sample types. The similarity of CSF and nasopharyngeal DENV subtypes (genotype 1 and 3) suggests a possible correlation between nasopharyngeal replication and neurological complications. The case presented highlights the direct neuropathogenicity of DENV early in the course of infection, and a potential correlation between nasopharyngeal replication and neurological disease.
- Published
- 2024
- Full Text
- View/download PDF
5. Cryptococcal laryngitis in an immunocompetent asthmatic patient using inhaled corticosteroids
- Author
-
G.I. Butel-Simoes, H. Kua, A. Safdar, M. Graham, T. Korman, and Z. Meher-Homji
- Subjects
Cryptococcosis ,Laryngitis ,Inhaled corticosteroid ,Dysphonia ,Medicine (General) ,R5-920 ,Biology (General) ,QH301-705.5 - Abstract
We present a case of laryngeal cryptococcosis caused by cryptococcosis neoformans var. grubii affecting a patient using excessive inhaled corticosteroids. The patient experienced symptoms for several months prior to specialist review and the visualization of a mass lesion by nasopharyngoscopy. Fortunately a biopsy was performed and through histopathology & microbiological assessment a diagnosis of cryptococcal laryngitis was made. Treatment with 6 months of fluconazole resulted in clinical cure and resolution of symptoms. It is important to raise awareness of the risk of non-Candida fungal infections in patients on high dose corticosteroids, especially in the post covid era were steroids are more commonly prescribed.
- Published
- 2023
- Full Text
- View/download PDF
6. Neonatal necrotizing enterocolitis: Clostridium butyricum and Clostridium neonatale fermentation metabolism and enteropathogenicity
- Author
-
Laurent Ferraris, Aurélie Balvay, Deborah Bellet, Johanne Delannoy, Claire Maudet, Thibaut Larcher, Jean-Christophe Rozé, Catherine Philippe, Thierry Meylheuc, Marie-José Butel, Sylvie Rabot, and Julio Aires
- Subjects
Clostridium butyricum ,Clostridium neonatale ,necrotizing enterocolitis ,butyrate ,animal model ,beta-hydroxybutyryl-CoA dehydrogenase ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
ABSTRACTBacterial colonization in the gut plays a pivotal role in neonatal necrotizing enterocolitis (NEC) development, but the relationship between bacteria and NEC remains unclear. In this study, we aimed to elucidate whether bacterial butyrate end-fermentation metabolites participate in the development of NEC lesions and confirm the enteropathogenicity of Clostridium butyricum and Clostridium neonatale in NEC. First, we produced C.butyricum and C.neonatale strains impaired in butyrate production by genetically inactivating the hbd gene encoding β-hydroxybutyryl-CoA dehydrogenase that produces end-fermentation metabolites. Second, we evaluated the enteropathogenicty of the hbd-knockout strains in a gnotobiotic quail model of NEC. The analyses showed that animals harboring these strains had significantly fewer and less intense intestinal lesions than those harboring the respective wild-type strains. In the absence of specific biological markers of NEC, the data provide original and new mechanistic insights into the disease pathophysiology, a necessary step for developing potential novel therapies.
- Published
- 2023
- Full Text
- View/download PDF
7. An integrated public health response to an outbreak of Murray Valley encephalitis virus infection during the 2022–2023 mosquito season in Victoria
- Author
-
Maxwell Braddick, Helen M. O’Brien, Chuan K. Lim, Rebecca Feldman, Cathy Bunter, Peter Neville, Christopher R. Bailie, Grace Butel-Simoes, Min-Ho Jung, Aidan Yuen, Nicole Hughes, and N. Deborah Friedman
- Subjects
Murray Valley encephalitis virus ,vector-borne disease ,mosquito-borne disease ,mosquitoes ,flavivirus ,encephalitis ,Public aspects of medicine ,RA1-1270 - Abstract
IntroductionMurray Valley encephalitis virus (MVEV) is a mosquito-borne flavivirus known to cause infrequent yet substantial human outbreaks around the Murray Valley region of south-eastern Australia, resulting in significant mortality.MethodsThe public health response to MVEV in Victoria in 2022–2023 included a climate informed pre-season risk assessment, and vector surveillance with mosquito trapping and laboratory testing for MVEV. Human cases were investigated to collect enhanced surveillance data, and human clinical samples were subject to serological and molecular testing algorithms to assess for co-circulating flaviviruses. Equine surveillance was carried out via enhanced investigation of cases of encephalitic illness. Integrated mosquito management and active health promotion were implemented throughout the season and in response to surveillance signals.FindingsMosquito surveillance included a total of 3,186 individual trapping events between 1 July 2022 and 20 June 2023. MVEV was detected in mosquitoes on 48 occasions. From 2 January 2023 to 23 April 2023, 580 samples (sera and CSF) were tested for flaviviruses. Human surveillance detected 6 confirmed cases of MVEV infection and 2 cases of “flavivirus-unspecified.” From 1 September 2022 to 30 May 2023, 88 horses with clinical signs consistent with flavivirus infection were tested, finding one probable and no confirmed cases of MVE.DiscussionThe expanded, climate-informed vector surveillance system in Victoria detected MVEV in mosquitoes in advance of human cases, acting as an effective early warning system. This informed a one-health oriented public health response including enhanced human, vector and animal surveillance, integrated mosquito management, and health promotion.
- Published
- 2023
- Full Text
- View/download PDF
8. Congenital asplenia study: clinical and laboratory characterisation of adults with congenital asplenia
- Author
-
Butel-Simoes, Grace I., Jones, Penelope, Wood, Erica M., Spelman, Denis, Woolley, Ian J., and Ojaimi, Samar
- Published
- 2022
- Full Text
- View/download PDF
9. The role of irinotecan-bevacizumab as rescue regimen in children with low-grade gliomas: a retrospective nationwide study in 72 patients
- Author
-
de Marcellus, Charles, Tauziède-Espariat, Arnault, Cuinet, Aurélie, Pasqualini, Claudia, Robert, Matthieu P., Beccaria, Kevin, Puget, Stéphanie, Boddaert, Nathalie, Figarella-Branger, Dominique, De Carli, Emilie, Bourdeaut, Franck, Leblond, Pierre, Fouyssac, Fanny, Andre, Nicolas, Bertozzi, Anne I., Butel, Thibaut, Dufour, Christelle, Valteau-Couanet, Dominique, Varlet, Pascale, and Grill, Jacques
- Published
- 2022
- Full Text
- View/download PDF
10. Occurrence of Neonatal Necrotizing Enterocolitis in Premature Neonates and Gut Microbiota: A Case–Control Prospective Multicenter Study
- Author
-
Julio Aires, Zehra Esra Ilhan, Lancelot Nicolas, Laurent Ferraris, Johanne Delannoy, Maxime Bredel, Anne Chauvire-Drouard, Frédéric Barbut, Jean-Christophe Rozé, Patricia Lepage, Marie-José Butel, and ClosNEC Study Group
- Subjects
necrotizing enterocolitis ,NEC ,multicenter study ,gut microbiota ,UPEC ,uropathogenic Escherichia coli ,Biology (General) ,QH301-705.5 - Abstract
Background: Necrotizing enterocolitis (NEC) is still one of the leading causes of neonatal death. The present study reports the data from a French case–control prospective multicenter study. Methods: A total of 146 preterm neonates (PNs) with or without NEC were included. Bacterial 16S rRNA gene sequencing was performed on stool samples (n = 103). Specific culture media were used to isolate Escherichia coli, Clostridium butyricum, and Clostridium neonatale, and strains were phenotypically characterized. Results: The gut microbiota of PNs was dominated by Firmicutes and Proteobacteria, and five enterotypes were identified. The microbiota composition was similar between NEC cases and PN controls. However, differences were observed in the relative abundance of Lactobacillus genus, which was significantly lower in the NEC group, whereas that of the Clostridium cluster III was significantly higher (p < 0.05). Within enterotypes, several phylotypes were significantly more abundant in NEC cases (p < 0.05). Regarding perinatal factors, a statistical association was found between the gut microbiota and cesarean delivery and antifungal therapy. In NEC cases and PN controls, the carriage rates and virulence genes of uropathogenic E. coli were equivalent based on culture. No correlation was found between E. coli, C. butyricum, and C. neonatale carriages, beta-lactam resistance, and antibiotic treatment. Conclusions: At disease onset, our data support a microbiota dysbiosis between NEC and control infants at the genus level. In addition, it provides valuable information on bacterial antimicrobial susceptibility.
- Published
- 2023
- Full Text
- View/download PDF
11. Emergence and spread of SARS-CoV-2 lineage B.1.620 with variant of concern-like mutations and deletions
- Author
-
Gytis Dudas, Samuel L. Hong, Barney I. Potter, Sébastien Calvignac-Spencer, Frédéric S. Niatou-Singa, Thais B. Tombolomako, Terence Fuh-Neba, Ulrich Vickos, Markus Ulrich, Fabian H. Leendertz, Kamran Khan, Carmen Huber, Alexander Watts, Ingrida Olendraitė, Joost Snijder, Kim N. Wijnant, Alexandre M.J.J. Bonvin, Pascale Martres, Sylvie Behillil, Ahidjo Ayouba, Martin Foudi Maidadi, Dowbiss Meta Djomsi, Celestin Godwe, Christelle Butel, Aistis Šimaitis, Miglė Gabrielaitė, Monika Katėnaitė, Rimvydas Norvilas, Ligita Raugaitė, Giscard Wilfried Koyaweda, Jephté Kaleb Kandou, Rimvydas Jonikas, Inga Nasvytienė, Živilė Žemeckienė, Dovydas Gečys, Kamilė Tamušauskaitė, Milda Norkienė, Emilija Vasiliūnaitė, Danguolė Žiogienė, Albertas Timinskas, Marius Šukys, Mantas Šarauskas, Gediminas Alzbutas, Adrienne Amuri Aziza, Eddy Kinganda Lusamaki, Jean-Claude Makangara Cigolo, Francisca Muyembe Mawete, Emmanuel Lokilo Lofiko, Placide Mbala Kingebeni, Jean-Jacques Muyembe Tamfum, Marie Roseline Darnycka Belizaire, René Ghislain Essomba, Marie Claire Okomo Assoumou, Akenji Blaise Mboringong, Alle Baba Dieng, Dovilė Juozapaitė, Salome Hosch, Justino Obama, Mitoha Ondo’o Ayekaba, Daniel Naumovas, Arnoldas Pautienius, Clotaire Donatien Rafaï, Astra Vitkauskienė, Rasa Ugenskienė, Alma Gedvilaitė, Darius Čereškevičius, Vaiva Lesauskaitė, Lukas Žemaitis, Laimonas Griškevičius, and Guy Baele
- Subjects
Science - Abstract
Here, the authors describe the emergence and spread of a new potential SARS-CoV-2 variant of interest, B.1.620. They show that this lineage, first identified in Lithuania, has established local transmission in Europe on multiple occasions and likely emerged in Central Africa.
- Published
- 2021
- Full Text
- View/download PDF
12. Traditions and Changes in French Atlantic Trade Between 1780 and 1830
- Author
-
Butel, P., primary
- Published
- 2022
- Full Text
- View/download PDF
13. Very Preterm Children Gut Microbiota Comparison at the Neonatal Period of 1 Month and 3.5 Years of Life
- Author
-
Gaël Toubon, Marie-José Butel, Jean-Christophe Rozé, Patricia Lepage, Johanne Delannoy, Pierre-Yves Ancel, Marie-Aline Charles, Julio Aires, for the EPIFLORE Study Group, Clotilde Rousseau, Joel Dore, Ziad Al Nabhani, Karine Le Roux, Celine Monot, Laetitia MartinMarchand, Melanie Durox, Alexandre Lapillonne, Jean-Charles Picaud, Farid Boudred, Delphine Mitanchez, Valerie Biran, Laurent Storme, Olivier Claris, Gilles Cambonie, Cyril Flamant, Anne Sauret, Odile Dicky, Geraldine Favrais, Jean-Michel Hascoet, Geraldine Gascoin, Gerard Thiriez, Luc Desfrere, Xavier Durrmeyer, and Clement Chollat
- Subjects
prematurity ,gut microbiota ,DOHaD ,children ,enterotypes ,Microbiology ,QR1-502 - Abstract
Prematurity is a risk factor for dysbiosis of the gut microbiota due to particular birth conditions and frequent prolonged hospitalization of neonates. Although gut microbiota colonization after birth and its establishment during the hospitalization period have been studied in preterm infants, data on gut microbiota following discharge, particularly during early childhood, are scarce. The present study investigated the relationship between gut microbiota at 1 month after birth (hospitalization period) and 3.5 years of age in 159 preterm children belonging to the French EPIFLORE prospective observational cohort study. Analysis using bacterial 16S rRNA gene sequencing showed that the gut microbiota of preterm neonates at 1 month was highly variable and characterized by six distinct enterotypes. In contrast, the gut microbiota of the same children at 3.5 years of age showed less variability, with only two discrete enterotypes. An absence of association between enterotypes at 1 month and 3.5 years of age was observed. While the alpha diversity of gut microbiota significantly increased between 1 month and 3.5 years of age, for both alpha and beta diversities, there was no correlation between the 1-month and 3.5-years time points. Comparison at 3.5 years between children born either preterm (n = 159) or full-term (n = 200) showed no differences in terms of enterotypes, but preterm children harbored a lower Shannon diversity index and a different overall composition of microbiota than full-term children. This study suggests that the characteristics of the early gut microbiota of preterm children are not predictive of the microbial community composition at 3.5 years of age. However, the impact of gestational age is still noticeable on the gut microbiota up to 3.5 years of age.
- Published
- 2022
- Full Text
- View/download PDF
14. Gut Microbiota Diversity of Preterm Neonates Is Associated With Clostridioides Difficile Colonization
- Author
-
Jeanne Couturier, Patricia Lepage, Sarah Jolivet, Johanne Delannoy, Victoria Mesa, Pierre-Yves Ancel, Jean-Christophe Rozé, Marie-José Butel, Frédéric Barbut, and Julio Aires
- Subjects
Clostridioides (Clostridium) difficile ,colonization ,preterm neonates ,gut microbiota ,microbial diversity ,16S rRNA gene sequencing ,Microbiology ,QR1-502 - Abstract
In adults, Clostridioides difficile infections are associated with alterations of the intestinal bacterial populations. Although preterm neonates (PN) are frequently colonized by C. difficile, limited data are available regarding the relationship between C. difficile and the intestinal microbiota of this specific population. Therefore, we studied the intestinal microbiota of PN from two multicenter cohorts using high-throughput sequencing of the bacterial 16S rRNA gene. Our results showed that alpha diversity was significantly higher in children colonized by C. difficile than those without colonization. Beta diversity significantly differed between the groups. In multivariate analysis, C. difficile colonization was significantly associated with the absence of postnatal antibiotherapy and higher gestational age. Taxa belonging to the Lachnospiraceae, Enterobacteriaceae, Oscillospiraceae families and Veillonella sp. were positively associated with C. difficile colonization, whereas Bacteroidales and Bifidobacterium breve were negatively associated with C. difficile colonization. After adjustment for covariables, Clostridioides, Rothia, Bifidobacterium, Veillonella, Eisenbergiella genera and Enterobacterales were more abundant in the gut microbiota of colonized children. There was no significant association between C. difficile colonization and necrotizing enterocolitis in PN. Our results suggest that C. difficile colonization in PN is related to the establishment of physiological microbiota.
- Published
- 2022
- Full Text
- View/download PDF
15. Early Life Factors Influencing Children Gut Microbiota at 3.5 Years from Two French Birth Cohorts
- Author
-
Gaël Toubon, Marie-José Butel, Jean-Christophe Rozé, Ioannis Nicolis, Johanne Delannoy, Cécile Zaros, Pierre-Yves Ancel, Julio Aires, and Marie-Aline Charles
- Subjects
gut microbiota ,preschool children ,early life factors ,DOHaD ,enterotypes ,Biology (General) ,QH301-705.5 - Abstract
Early life gut microbiota-influencing factors may play an important role in programming individuals long-term health and substantial efforts have been devoted into studying the development of the gut microbiota in relation to early life events. This study aimed to examine in a single study, the persistence of associations between 20 factors occurring in the early life and the gut microbiota at 3.5 years of 798 children from two French nationwide birth cohorts, EPIPAGE 2 (very preterm children) and ELFE (late preterm and full-term children). Gut microbiota profiling was assessed using 16S rRNA gene sequencing-based method. Upon thorough adjustment of confounding factors, we demonstrated that gestational age was one of the factors most associated with gut microbiota differences with a noticeable imprint of prematurity at 3.5 years of age. Children born by cesarean section harbored lower richness and diversity and a different overall gut microbiota composition independently of preterm status. Children who had ever received human milk were associated with a Prevotella-driven enterotype (P_type) compared to those who had never received human milk. Living with a sibling was associated with higher diversity. Children with siblings and those attending daycare centers were associated with a P_type enterotype. Maternal factors including the country of birth and preconception maternal body mass index were associated with some microbiota characteristics: children born to overweight or obese mothers showed increased gut microbiota richness. This study reveals that multiple exposures operating from early life imprint the gut microbiota at 3.5 years that is a pivotal age when the gut microbiota acquires many of its adult characteristics.
- Published
- 2023
- Full Text
- View/download PDF
16. Emergence and spread of SARS-CoV-2 lineage B.1.620 with variant of concern-like mutations and deletions
- Author
-
Dudas, Gytis, Hong, Samuel L., Potter, Barney I., Calvignac-Spencer, Sébastien, Niatou-Singa, Frédéric S., Tombolomako, Thais B., Fuh-Neba, Terence, Vickos, Ulrich, Ulrich, Markus, Leendertz, Fabian H., Khan, Kamran, Huber, Carmen, Watts, Alexander, Olendraitė, Ingrida, Snijder, Joost, Wijnant, Kim N., Bonvin, Alexandre M.J.J., Martres, Pascale, Behillil, Sylvie, Ayouba, Ahidjo, Maidadi, Martin Foudi, Djomsi, Dowbiss Meta, Godwe, Celestin, Butel, Christelle, Šimaitis, Aistis, Gabrielaitė, Miglė, Katėnaitė, Monika, Norvilas, Rimvydas, Raugaitė, Ligita, Koyaweda, Giscard Wilfried, Kandou, Jephté Kaleb, Jonikas, Rimvydas, Nasvytienė, Inga, Žemeckienė, Živilė, Gečys, Dovydas, Tamušauskaitė, Kamilė, Norkienė, Milda, Vasiliūnaitė, Emilija, Žiogienė, Danguolė, Timinskas, Albertas, Šukys, Marius, Šarauskas, Mantas, Alzbutas, Gediminas, Aziza, Adrienne Amuri, Lusamaki, Eddy Kinganda, Cigolo, Jean-Claude Makangara, Mawete, Francisca Muyembe, Lofiko, Emmanuel Lokilo, Kingebeni, Placide Mbala, Tamfum, Jean-Jacques Muyembe, Belizaire, Marie Roseline Darnycka, Essomba, René Ghislain, Assoumou, Marie Claire Okomo, Mboringong, Akenji Blaise, Dieng, Alle Baba, Juozapaitė, Dovilė, Hosch, Salome, Obama, Justino, Ayekaba, Mitoha Ondo’o, Naumovas, Daniel, Pautienius, Arnoldas, Rafaï, Clotaire Donatien, Vitkauskienė, Astra, Ugenskienė, Rasa, Gedvilaitė, Alma, Čereškevičius, Darius, Lesauskaitė, Vaiva, Žemaitis, Lukas, Griškevičius, Laimonas, and Baele, Guy
- Published
- 2021
- Full Text
- View/download PDF
17. Contrasting epigenetic control of transgenes and endogenous genes promotes post-transcriptional transgene silencing in Arabidopsis
- Author
-
Butel, Nicolas, Yu, Agnès, Le Masson, Ivan, Borges, Filipe, Elmayan, Taline, Taochy, Christelle, Gursanscky, Nial R., Cao, Jiangling, Bi, Shengnan, Sawyer, Anne, Carroll, Bernard J., and Vaucheret, Hervé
- Published
- 2021
- Full Text
- View/download PDF
18. Transgenerational effect of mutants in the RNA-directed DNA methylation pathway on the triploid block in Arabidopsis
- Author
-
Wang, Zhenxing, Butel, Nicolas, Santos-González, Juan, Simon, Lauriane, Wärdig, Cecilia, and Köhler, Claudia
- Published
- 2021
- Full Text
- View/download PDF
19. Structural Features and Genetic Diversity in Gag Gene of Rare HIV-1 Subtypes from the Democratic Republic of Congo.
- Author
-
Godwe, Célestin, Vidal, Nicole, Muwonga, Jérémie, Butel, Christelle, Serrano, Laetitia, Edidi, Samuel, Ahuka-Mundeke, Steve, Koro Koro, Francioli, Etoa, Xavier, Tongo, Marcel, Peeters, Martine, and Ayouba, Ahidjo
- Abstract
Type-1 HIV (HIV-1) group M (HIV-1M) genetic diversity is highest in the Congo Basin where the epidemic ignited a century ago. HIV-1M has diversified into multiple subtypes, sub-subtypes, and circulating and unique recombinant forms (CRFs/URFs). An unanswered question is why some rare subtypes never reached epidemic levels despite their age. Several studies identified the role of HIV-1M accessory genes nef and vpu in virus adaptation to human hosts and subsequent spread. Other reports also pointed out the pivotal role of gag in transmissibility, virulence, and replication capacity. In this study we characterized the HIV-1 gag gene of 148 samples collected in different localities of the Democratic Republic of the Congo (DRC) between 1997 and 2013. We used nested polymerase chain reaction (PCR) to amplify the whole gag gene. PCR products were sequenced either by Sanger method or by next generation sequencing on Illumina MiSeq or iSeq100 platforms. Generated sequences were used for subsequent analyses using different bioinformatic tools. Phylogenetic analysis of the generated sequences revealed a high genetic diversity with up to 22 different subtypes, sub-subtypes, CRFs. Up to 15% (22/148) URFs were identified, in addition to rare subtypes such as H, J, and K. At least two amino acid motifs present in the gag gene have been shown to modulate HIV-1 replication, budding, and fitness: the P(T/S)AP and the LYPXnL motifs. Structural analysis revealed the presence of P(T/S)AP in all the 148 sequences with the majority (136/148) bearing the PTAP. Three samples presented a duplication of this motif. The LYPXnL motif was identified in 38 of 148 sequences. There was no clear link between the frequency of these motifs and HIV-1M subtypes. In summary, we confirmed a high genetic diversity of HIV-1M in the DRC. We observed the presence of amino acid motifs important for viral replication and budding even in some rare HIV-1 subtypes. Their impact on viral fitness needs be further evaluated by in vitro studies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
20. Isolation and Characterization of Commensal Bifidobacteria Strains in Gut Microbiota of Neonates Born Preterm: A Prospective Longitudinal Study
- Author
-
Sandra Wydau-Dematteis, Johanne Delannoy, Anne-Claire Téolis, Agnès Giuseppi, Florence Campeotto, Alexandre Lapillonne, Marie-José Butel, and Julio Aires
- Subjects
bifidobacteria ,microbiota ,preterm neonate ,Biology (General) ,QH301-705.5 - Abstract
Bifidobacterial population dynamics were investigated using a longitudinal analysis of dominant species isolated from feces of neonates born preterm (singletons (n = 10), pairs of twins (n = 11)) from birth up to 16 months of age. We performed quantification, isolation, and identification of the dominant bifidobacteria strains. The genetic relationship of the isolates was investigated via pulsed field gel electrophoresis (PFGE) genotyping, and PCR was used to screen the specific genetic marker tet genes. Additionally, all of the isolated strains were phenotypically characterized by their response to gastro-intestinal stresses and the MIC determination of tetracycline. In the same individual, our results showed a turnover of the bifidobacteria dominant population not only at species but also at strain levels. In addition, we found clonally related strains between twins. A minority of strains were tolerant to gastric (6%) and intestinal (16%) stresses. Thirteen percent of the strains were resistant to tetracycline. This work is original as it provides insights at the strain level of the early life in vivo dynamics of gut microbiota bifidobacteria in preterm neonates. It highlights the need to take into consideration the fluctuation of bifidobacteria populations that may occur for one individual.
- Published
- 2022
- Full Text
- View/download PDF
21. Effect of Exercise on Brain-Derived Neurotrophic Factor in Stroke Survivors: A Systematic Review and Meta-Analysis.
- Author
-
Ashcroft, Sarah K., Ironside, Daniel D., Johnson, Liam, Kuys, Suzanne S., and Thompson-Butel, Angelica G.
- Published
- 2023
- Full Text
- View/download PDF
22. Established and Emerging Cancer Therapies and Cardiovascular System: Focus on Hypertension—Mechanisms and Mitigation.
- Author
-
Butel-Simoes, Lloyd E., Haw, Tatt Jhong, Williams, Trent, Sritharan, Shanathan, Gadre, Payal, Herrmann, Sandra M., Herrmann, Joerg, Ngo, Doan T.M., and Sverdlov, Aaron L.
- Abstract
Cardiovascular disease and cancer are 2 of the leading causes of death worldwide. Although improvements in outcomes have been noted for both disease entities, the success of cancer therapies has come at the cost of at times very impactful adverse events such as cardiovascular events. Hypertension has been noted as both, a side effect as well as a risk factor for the cardiotoxicity of cancer therapies. Some of these dynamics are in keeping with the role of hypertension as a cardiovascular risk factor not only for heart failure, but also for the development of coronary and cerebrovascular disease, and kidney disease and its association with a higher morbidity and mortality overall. Other aspects such as the molecular mechanisms underlying the amplification of acute and long-term cardiotoxicity risk of anthracyclines and increase in blood pressure with various cancer therapeutics remain to be elucidated. In this review, we cover the latest clinical data regarding the risk of hypertension across a spectrum of novel anticancer therapies as well as the underlying known or postulated pathophysiological mechanisms. Furthermore, we review the acute and long-term implications for the amplification of the development of cardiotoxicity with drugs not commonly associated with hypertension such as anthracyclines. An outline of management strategies, including pharmacological and lifestyle interventions as well as models of care aimed to facilitate early detection and more timely management of hypertension in patients with cancer and survivors concludes this review, which overall aims to improve both cardiovascular and cancer-specific outcomes. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
23. Effect of Exercise on Brain-Derived Neurotrophic Factor in Stroke Survivors: A Systematic Review and Meta-Analysis.
- Author
-
Ashcroft, Sarah K., Ironside, Daniel D., Johnson, Liam, Kuys, Suzanne S., and Thompson-Butel, Angelica G.
- Published
- 2022
- Full Text
- View/download PDF
24. Promoting Confident Body, Confident Child in community child health: A mixed‐methods implementation study
- Author
-
Norton, Lyza, Hart, Laura M., Butel, Francoise, Moloney, Susan, O’Connor, Narelle, Attenborough, Vicki, Roberts, Shelley, and Cargo, Margaret
- Abstract
To evaluate population‐level implementation of Confident Body, Confident Child (CBCC); an evidence‐based program providing parenting strategies to promote healthy eating, physical activity and body satisfaction in children aged 2‐6 years; with community child health nurses (CHNs). This study utilised an implementation‐effectiveness hybrid design, with dual focus on assessing: (a) CBCC implementation into Child Health Centres at a regional health service in Queensland, Australia (process evaluation); and (b) CBCC’s effect on CHNs’ knowledge and attitudes (outcomes evaluation). Process (CBCC reach, dose, fidelity) and outcome data (CHN knowledge of child body image; and attitudes towards higher body weights) were collected during implementation, and pre‐ and post‐intervention delivery to CHNs, respectively. Twenty‐six CHNs (all female; mean age 52.7 ± 9.5 years) participated in the study by attending a 1‐day CBCC training workshop and completing demographic and outcome surveys. Process evaluation found that CBCC was implemented as planned and reached 56% of CHNs across the health service. Outcome evaluation showed small but non‐significant improvements in CHN knowledge (P= .077) and attitudes towards overweight (using Anti‐Fat Attitudes scale; significant improvements on willpower sub‐scale only (P< .05)). This is the first study to evaluate population‐wide CBCC implementation in a real‐world health service setting with CHNs. Findings highlight the potential for using pragmatic, implementation‐focused methodologies to translate preventive eating disorder programs into community child health services.
- Published
- 2022
- Full Text
- View/download PDF
25. Microbiote intestinal et sommeil chez les enfants de 3,5 ans d’une cohorte de naissance française
- Author
-
Houshialsadat, Zeinab, Zaros, Cécile, Butel, Marie-José, Charles, Marie-Aline, Toubon, Gaël, and Plancoulaine, Sabine
- Abstract
Évaluer les associations entre composition et diversité du MI et des clusters de sommeil, incluant durées de sommeil et fréquence des difficultés d’endormissement et des réveils nocturnes, chez 597 enfants de 3,5 ans.
- Published
- 2024
- Full Text
- View/download PDF
26. Diagnostic and phylogenetic features of the 2023 Murray Valley encephalitis virus outbreak in Australia
- Author
-
Howard-Jones, Annaleise R., Mahar, Jackie E., Eden, John-Sebastian, Dwyer, Dominic E., O’Sullivan, Matthew V., Williams, David T., Kok, Jen, Proudmore, Kate, Butel-Simoes, Grace, Neave, Matthew J., Mileto, Patrick, Hueston, Linda, Freeman, Kevin, Ellem, Justin, Caly, Leon, Thomas, Ashmita, Taylor, Carmel, Kurucz, Nina, Smyth, Kirsten, Jennison, Amy, Moore, Peter, Wright, Rose, Mahony, Andrew A., Warner, Morgyn, Papanicolas, Lito, Schlebusch, Sanmarie, Lim, Chuan Kok, Baird, Robert, Speers, David, and Currie, Bart
- Published
- 2024
- Full Text
- View/download PDF
27. Cryptococcal laryngitis in an immunocompetent asthmatic patient using inhaled corticosteroids.
- Author
-
Butel-Simoes, G.I., Kua, H., Safdar, A., Graham, M., Korman, T., and Meher-Homji, Z.
- Abstract
We present a case of laryngeal cryptococcosis caused by cryptococcosis neoformans var. grubii affecting a patient using excessive inhaled corticosteroids. The patient experienced symptoms for several months prior to specialist review and the visualization of a mass lesion by nasopharyngoscopy. Fortunately a biopsy was performed and through histopathology & microbiological assessment a diagnosis of cryptococcal laryngitis was made. Treatment with 6 months of fluconazole resulted in clinical cure and resolution of symptoms. It is important to raise awareness of the risk of non-Candida fungal infections in patients on high dose corticosteroids, especially in the post covid era were steroids are more commonly prescribed. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
28. Neonatal necrotizing enterocolitis: Clostridium butyricumand Clostridium neonatalefermentation metabolism and enteropathogenicity
- Author
-
Ferraris, Laurent, Balvay, Aurélie, Bellet, Deborah, Delannoy, Johanne, Maudet, Claire, Larcher, Thibaut, Rozé, Jean-Christophe, Philippe, Catherine, Meylheuc, Thierry, Butel, Marie-José, Rabot, Sylvie, and Aires, Julio
- Abstract
ABSTRACTBacterial colonization in the gut plays a pivotal role in neonatal necrotizing enterocolitis (NEC) development, but the relationship between bacteria and NEC remains unclear. In this study, we aimed to elucidate whether bacterial butyrate end-fermentation metabolites participate in the development of NEC lesions and confirm the enteropathogenicity of Clostridium butyricumand Clostridium neonatalein NEC. First, we produced C.butyricumand C.neonatalestrains impaired in butyrate production by genetically inactivating the hbdgene encoding β-hydroxybutyryl-CoA dehydrogenase that produces end-fermentation metabolites. Second, we evaluated the enteropathogenicty of the hbd-knockout strains in a gnotobiotic quail model of NEC. The analyses showed that animals harboring these strains had significantly fewer and less intense intestinal lesions than those harboring the respective wild-type strains. In the absence of specific biological markers of NEC, the data provide original and new mechanistic insights into the disease pathophysiology, a necessary step for developing potential novel therapies.
- Published
- 2023
- Full Text
- View/download PDF
29. Additional therapy promotes a continued pattern of improvement in upper-limb function and independence post-stroke.
- Author
-
Thompson-Butel, AG, Ashcroft, SK, Lin, G, Trinh, T, and McNulty, PA
- Abstract
• Continued functional improvements are evident for all stroke survivors, regardless of baseline upper-limb motor-function. • Baseline upper-limb motor-function should be used to personalise rehabilitation (e.g. duration of therapy programs). • Multiple additional therapy programs are needed to progress low to high motor-function. Upper-limb motor impairment after stroke is common and disabling. Growing evidence suggests that rehabilitation is effective in the chronic period. However, there is limited knowledge on the effects of ongoing targeted rehabilitation programs on patient outcomes. This study investigated the effects of delivering two programs of dose-matched evidence-based upper-limb rehabilitation to community-dwelling post-acute stroke patients with low, moderate and high motor-function. 12 patients (2 female) aged 50.5±18.2 years and 13.8±10.8 months post-stroke completed 2-weeks of modified-Constraint-Induced Movement Therapy followed by 2-weeks of Wii-based Movement Therapy after a mean interval of 9.6±1.1 months (range 6-19months). Function was assessed at 6 time points (i.e. before and after each therapy program and 6-month follow-up after each program). Primary outcome measures were the Wolf Motor Function Test timed-tasks (WMFT-tt), upper-limb Fugl-Meyer Assessment (F-M) and the Motor Activity Log Quality of Movement Scale (MALQOM). Improvement and maintenance was analyzed using Paired T-Tests and Wilcoxon Signed Rank Tests. Upper-limb function significantly improved on all primary outcome measures with the first therapy program (WMFT-tt p= 0.008, F-M p= 0.007 and MALQOM p< 0.0001). All scores continued to improve with the second therapy program with significant improvements in the F-M (p= 0.048) and the MALQOM (p= 0.001). All patients showed a pattern of continued improvement in upper-limb motor-function and independence in activities of daily living. These improvements demonstrate the benefit of ongoing post-stroke rehabilitation for community-dwelling stroke survivors for individuals of varying baseline functional status. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
30. Food Security is Associated with Higher Diet Quality Among Children of the US–Affiliated Pacific Region
- Author
-
Hingle, Melanie, Short, Eliza, Aflague, Tanisha, Boushey, Carol, Butel, Jean, Coleman, Patricia, Deenik, Jonathan, Fleming, Travis, Olfert, Melissa, Shallcross, Leslie, Wilkens, Lynne R., and Novotny, Rachel
- Abstract
The prevalence of food insecurity and its relationship to diet quality are factors impacting the health of persons living across the United States–affiliated Pacific region (USAP).
- Published
- 2023
- Full Text
- View/download PDF
31. Reducing unnecessary testing on sputum specimens from patients with cystic fibrosis: pathology stewardship in microbiology
- Author
-
Butel-Simoes, Grace, Kotsanas, Despina, Streitberg, Richard, Horne, Kylie, Finlay, Paul, Hamblin, John, Francis, Michelle, Kumar, Beena, Armstrong, David, and Graham, Maryza
- Abstract
Chronic respiratory tract infection by Pseudomonas aeruginosais the hallmark of established lung disease in patients with cystic fibrosis (CF). Antibiotic therapy can usually only suppress but not eradicate infection. In recent years, pulmonary infection with non-tuberculous Mycobacteria(NTM) species has also been increasing. These patients are often colonised with multiple isolates and determination of clinical significance of each isolate is difficult. The clinical value of frequent routine susceptibility testing of individual isolates is unproven, particularly since a delay in susceptibility testing is inevitable when purification of multiple cultured isolates is required to test each isolate separately. From August 2019 until December 2020 we ceased routine susceptibility testing on P. aeruginosarespiratory tract isolates from patients with CF if a previous isolate from the patient had susceptibility testing performed. We found that the proportion of P. aeruginosaisolates that had susceptibility testing performed dropped from 97% to 11% as a result of this change in laboratory process. During this time, we also ceased routine culture for acid-fast bacilli if this had been performed within the previous 6 months. We present the cost and resource savings for these changes in laboratory process and assess for clinical impact measured as hospital admissions, length of stay in hospital and mortality.
- Published
- 2023
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.