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Search Results: 1 - 5 of 5 matches for " Boubou Diagouraga "
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The Tale of Protein Lysine Acetylation in the Cytoplasm
Karin Sadoul,Jin Wang,Boubou Diagouraga,Saadi Khochbin
Journal of Biomedicine and Biotechnology , 2011, DOI: 10.1155/2011/970382
Abstract: Reversible posttranslational modification of internal lysines in many cellular or viral proteins is now emerging as part of critical signalling processes controlling a variety of cellular functions beyond chromatin and transcription. This paper aims at demonstrating the role of lysine acetylation in the cytoplasm driving and coordinating key events such as cytoskeleton dynamics, intracellular trafficking, vesicle fusion, metabolism, and stress response.
Test of Colonisation Scenarios Reveals Complex Invasion History of the Red Tomato Spider Mite Tetranychus evansi
Angham Boubou, Alain Migeon, George K. Roderick, Philippe Auger, Jean-Marie Cornuet, Sara Magalh?es, Maria Navajas
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0035601
Abstract: The spider mite Tetranychus evansi is an emerging pest of solanaceous crops worldwide. Like many other emerging pests, its small size, confusing taxonomy, complex history of associations with humans, and propensity to start new populations from small inocula, make the study of its invasion biology difficult. Here, we use recent developments in Approximate Bayesian Computation (ABC) and variation in multi-locus genetic markers to reconstruct the complex historical demography of this cryptic invasive pest. By distinguishing among multiple pathways and timing of introductions, we find evidence for the “bridgehead effect”, in which one invasion serves as source for subsequent invasions. Tetranychus evansi populations in Europe and Africa resulted from at least three independent introductions from South America and involved mites from two distinct sources in Brazil, corresponding to highly divergent mitochondrial DNA lineages. Mites from southwest Brazil (BR-SW) colonized the African continent, and from there Europe through two pathways in a “bridgehead” type pattern. One pathway resulted in a widespread invasion, not only to Europe, but also to other regions in Africa, southern Europe and eastern Asia. The second pathway involved the mixture with a second introduction from BR-SW leading to an admixed population in southern Spain. Admixture was also detected between invasive populations in Portugal. A third introduction from the Brazilian Atlantic region resulted in only a limited invasion in Europe. This study illustrates that ABC methods can provide insights into, and distinguish among, complex invasion scenarios. These processes are critical not only in understanding the biology of invasions, but also in refining management strategies for invasive species. For example, while reported observations of the mite and outbreaks in the invaded areas were largely consistent with estimates of geographical expansion from the ABC approach, historical observations failed to recognize the complex pathways involved and the corresponding effects on genetic diversity.
Non-Hodgkin’s lymphoma revealed by an ilio-colic intussusception in a Moroccan patient: a case report
KIM Hassani, H El bouhaddouti, A Ousadden, A Ankouz, M Boubou, S Tizniti, K Mazaz, KA Taleb
Pan African Medical Journal , 2010,
Abstract: Intussusceptions are rare but well-known causes of the small bowel obstruction in adults and an underlying cause is present in the majority of cases. Lymphoma’s involvement of the ileum is one of the rare causes of intussusception. CT is a sensitive examination that diagnoses intussusceptions and provides an excellent preoperative evaluation including possible extension and dissemination especially in intestinal lymphomas. The treatment is almost always surgical and the pathological study is needed for diagnostic confirmation. Authors present an unusual case of intestinal intussusception due to lymphoma of the terminal part of the ileum in a 49- year-old man. Computed tomography confirmed the diagnosis of intussusception and non-Hodgkin’s lymphoma of B-cell was diagnosed by histological examination after surgical treatment. Primary intestinal lymphomas differ from gastric lymphomas in clinical features, treatment, and prognosis. They are not well characterized and the standardized concepts for their clinical diagnosis and management are absent. The aim of this rare observation is to shed light on NHL of the small bowel, its clinical and radiological diagnosis and its treatment especially in forms revealed by intussusceptions in adults.
Bacterial Factors Associated with Lethal Outcome of Enteropathogenic Escherichia coli Infection: Genomic Case-Control Studies
Michael S. Donnenberg?,Tracy H. Hazen?,Tamer H. Farag?,Sandra Panchalingam?,Martin Antonio?,Anowar Hossain?,Inacio Mandomando?,John Benjamin Ochieng?,Thandavarayan Ramamurthy?,Boubou Tamboura
PLOS Neglected Tropical Diseases , 2015, DOI: 10.1371/journal.pntd.0003791
Abstract: Background Typical enteropathogenic Escherichia coli (tEPEC) strains were associated with mortality in the Global Enteric Multicenter Study (GEMS). Genetic differences in tEPEC strains could underlie some of the variability in clinical outcome. Methods We produced draft genome sequences of all available tEPEC strains from GEMS lethal infections (LIs) and of closely matched EPEC strains from GEMS subjects with non-lethal symptomatic infections (NSIs) and asymptomatic infections (AIs) to identify gene clusters (potential protein encoding sequences sharing ≥90% nucleotide sequence identity) associated with lethality. Results Among 14,412 gene clusters identified, the presence or absence of 392 was associated with clinical outcome. As expected, more gene clusters were associated with LI versus AI than LI versus NSI. The gene clusters more prevalent in strains from LI than those from NSI and AI included those encoding proteins involved in O-antigen biogenesis, while clusters encoding type 3 secretion effectors EspJ and OspB were among those more prevalent in strains from non-lethal infections. One gene cluster encoding a variant of an NleG ubiquitin ligase was associated with LI versus AI, while two other nleG clusters had the opposite association. Similar associations were found for two nleG gene clusters in an additional, larger sample of NSI and AI GEMS strains. Conclusions Particular genes are associated with lethal tEPEC infections. Further study of these factors holds potential to unravel the mechanisms underlying severe disease and to prevent adverse outcomes.
Identification by PCR of Non-typhoidal Salmonella enterica Serovars Associated with Invasive Infections among Febrile Patients in Mali
Sharon M. Tennant,Souleymane Diallo,Haim Levy,Sofie Livio,Samba O. Sow,Milagritos Tapia,Patricia I. Fields,Matthew Mikoleit,Boubou Tamboura,Karen L. Kotloff,James P. Nataro,James E. Galen,Myron M. Levine
PLOS Neglected Tropical Diseases , 2010, DOI: 10.1371/journal.pntd.0000621
Abstract: Background In sub-Saharan Africa, non-typhoidal Salmonella (NTS) are emerging as a prominent cause of invasive disease (bacteremia and focal infections such as meningitis) in infants and young children. Importantly, including data from Mali, three serovars, Salmonella enterica serovar Typhimurium, Salmonella Enteritidis and Salmonella Dublin, account for the majority of non-typhoidal Salmonella isolated from these patients. Methods We have extended a previously developed series of polymerase chain reactions (PCRs) based on O serogrouping and H typing to identify Salmonella Typhimurium and variants (mostly I 4,[5],12:i:-), Salmonella Enteritidis and Salmonella Dublin. We also designed primers to detect Salmonella Stanleyville, a serovar found in West Africa. Another PCR was used to differentiate diphasic Salmonella Typhimurium and monophasic Salmonella Typhimurium from other O serogroup B, H:i serovars. We used these PCRs to blind-test 327 Salmonella serogroup B and D isolates that were obtained from the blood cultures of febrile patients in Bamako, Mali. Principal Findings We have shown that when used in conjunction with our previously described O-serogrouping PCR, our PCRs are 100% sensitive and specific in identifying Salmonella Typhimurium and variants, Salmonella Enteritidis, Salmonella Dublin and Salmonella Stanleyville. When we attempted to differentiate 171 Salmonella Typhimurium (I 4,[ 5],12:i:1,2) strains from 52 monophasic Salmonella Typhimurium (I 4,[5],12:i:-) strains, we were able to correctly identify 170 of the Salmonella Typhimurium and 51 of the Salmonella I 4,[5],12:i:- strains. Conclusion We have described a simple yet effective PCR method to support surveillance of the incidence of invasive disease caused by NTS in developing countries.
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