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Hallmarks in colorectal cancer:Angiogenesis and cancer stem-like cells

World Journal of Gastroenterology 2014年第15期20卷 4189-4196页

作者： Muriel Mathonnet Aurelie Perraud Niki Christou Hussein Akil carole melin Serge Battu Marie-Odile Jauberteau Yves Denizot Department of Digestive Surgery Limoges University Hospital87042 LimogesFrance Homéostasie Cellulaire at Pathologies Faculty of MedicineUniversity of Limoges87025 LimogesFrance Institut 145 GEIST UMR CNRS 7276Faculty of MedicineUniversity of Limoges87025 LimogesFrance

Carcinogenesis is a multistep process that requires the accumulation of various genetic and epigenetic aberrations to drive the progressive malignant transformation of normal human cells.Two major hallmarks of carcinogenesis that have been described are angiogenesis and the stem cell characteristic of limitless replicative potential.These properties have been targeted over the past decade in the development of therapeutic treatments for colorectal cancer(CRC),one of the most commonly diagnosed and lethal cancers worldwide.The treatment of solid tumor cancers such as CRC has been challenging due to the heterogeneity of the tumor itself and the chemoresistance of the malignant cells.Furthermore,the same microenvironment that maintains the pool of intestinal stem cells that contribute to the continuous renewal of the intestinal epithelia also provides the necessary conditions for proliferative growth of cancer stem-like cells.These cancer stem-like cells are responsible for the resistance to therapy and cancer recurrence,though they represent less than 2.5%of the tumor mass.The stromal environment surrounding the tumor cells,referred to as the tumor niche,also supports angiogenesis,which supplies the oxygen and nutrients needed for tumor development.Anti-angiogenic therapy,such as with bevacizumab,a monoclonal antibody against vascular-endothelial growth factor,significantly prolongs the survival of metastatic CRC patients.However,such treatments are not completely curative,and a large proportion of patient tumors retain chemoresistance or show recurrence.This article reviews the current knowledge regarding the molecular phenotype of CRC cancer cells,as well as discusses the mechanisms contributing to their maintenance.Future personalized therapeutic approaches that are based on the interaction of the carcinogenic hallmarks,namely angiogenic and proliferative attributes,could improve survival and decrease adverse effects induced by unnecessary chemotherapy.

关键词： Colon cancer Stem cell Cancer stem-like cell Tumor

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Development of a Proof-of-Concept Multi-Method Computer Simulation to Support Rural Healthcare Disaster Preparedness Planning

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International Journal of Disaster Risk Science 2024年第3期15卷 346-358页

作者： Thomas A.Berg Kristina W.Kintziger Julie Suzuki Crumly Scott A.Lawson carole R.Myers Tracey T.Stansberry College of Nursing University of Tennessee Knoxville Department of Environmental Agricultural and Occupational Health University of Nebraska Medical Center Public Health and Healthcare Oak Ridge Associated Universities

Due to a lack of resources, rural communities often face challenges when planning catastrophic events. This project involved applying systems thinking and model-based systems engineering to develop a proof-of-concept, multi-method computer simulation and then determining whether the simulation could be used to assess the efficacy of disaster planning approaches on health outcomes in rural communities, as a function of primary healthcare. The project focus was a rural or non-urban healthcare system experiencing a natural hazard. Both system dynamics and discrete event models were incorporated to represent subsystem operations, crucial disaster responses, as well as three key response systems: public health, emergency management, and healthcare. The subsystem models included several components: policies/procedures, communications,resources, exercises/drills/training, healthcare space and staff, and the flow of affected people into and through the system.The combined simulation can serve as a first step to a more comprehensive approach to helping rural communities achieve more efficient and effective healthcare planning for disaster responses.

关键词： Computer simulation Disaster preparedness Model-based systems engineering Rural healthcare System dynamics model Systems thinking

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Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry traces the geographical source of Biomphalaria pfeifferi and Bulinus forskali,involved in schistosomiasis transmission

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Infectious Diseases of Poverty 2024年第1期13卷 98-99页

作者： Papa Mouhamadou Gaye EI Hadj Ibrahima Ndiaye Souleymane Doucoure Doudou Sow Mapenda Gaye Ndiaw Goumballa carole Cassagne Coralie L'Ollivier Oleg Medianikov Cheikh Sokhna Stephane Ranque Aix-Marseille University IRD AP-HM SSA VITROME Marseille France VITROME International IRD-UCAD Campus Dakar Senegal Hospital-University Institut (IHU) Mediterranée Infection Marseille France Departement of Animal Biology Faculty of Sciences and Techniques UCAD Dakar Senegal Department of Parasitology-Mycology UFR Sciences de la Santé Université Gaston Berger Saint-Louis Senegal

Background Freshwater snails of the genera Bulinus spp.,Biomphalaria spp.,and Oncomelania spp.are the main intermediate hosts of human and animal schistosomiasis.Identification of these snails has long been based on mor-phological and/or genomic criteria,which have their limitations.These limitations include a lack of precision for the morphological tool and cost and time for the DNA-based approach.Recently,Matrix-Assisted Laser Desorp-tion/lonization Time-Of-Flight(MALDI-TOF)mass spectrometry,a new tool used which is routinely in clinical microbi-ology,has emerged in the field of malacology for the identification of freshwater snails.This study aimed to evaluate the ability of MALDI-TOF MS to identify Biomphalaria pfeifferi and Bulinus forskali snail populations according to their geographicalorigin.Methods This study was conducted on 101 Bi.pfeifferi and 81 Bu.forskali snails collected in three distinct geo-graphical areas of Senegal(the North-East,South-East and central part of the country),and supplemented with wild and laboratory strains.Specimens which had previously been morphologically described were identified by MALDl-TOF MS[identification log score values(LSV)≥1.7],after an initial blind test using the pre-existing database.After DNA-based identification,new reference spectra of Bi.pfeiferi(n=10)and Bu.forskali(n=5)from the geographical areas were added to the MALDI-TOF spectral database.The final blind test against this updated database was per-formed to assess identification at the geographic source level.Results MALDI-TOF MS correctly identified 92.1%of 101 Bi.pfeifferi snails and 98.8%of 81 Bu.forskali snails.At the final blind test,88%of 166 specimens were correctly identified according to both their species and sampling site,with LSVs ranging from 1.74 to 2.70.The geographical source was adequately identified in 90.1%of 91 Bi.pfeifferi and 85.3%of 75 Bu.forskalii samples.Conclusions Our findings demonstrate that MALDI-TOF MS can identify and differentiate snail populations according to geographic

关键词： Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry Snail Intermediate host Biomphalaria pfeifferi Bulinus forskali Schistosomiasis Senegal

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Associated Factors of Dental Caries among Intellectually Disabled Persons in Specialized Centers of Ouagadougou

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Open Journal of Epidemiology 2024年第2期14卷 297-311页

作者： Jocelyne Valerie Gare Filwende Dan Kientega Ouedraogo carole Nathaie Tenin Ouattara Seydou Kabore Wendpoulomde Aime Désire Nicolas Meda Training and Research Unit in Health Sciences Department of Public Health Joseph Ki Zerbo University Ouagadougou Burkina Faso Training and Research Unit in Health Sciences Department of Dental Surgery Joseph Ki Zerbo University Ouagadougou Burkina Faso

Introduction: Several studies have reported a high prevalence of dental caries among the people with intellectual disabilities. In order to identify the sociodemographic, clinical and behavioral factors associated with it, we conducted a study in specialized centers welcoming subjects with intellectual disabilities in Ouagadougou (Burkina Faso). Objectives: The objective of this study was to identify the factors associated with it among intellectually disabled in the specialized centers of Ouagadougou. Methods: The study was cross-sectional analytical. The survey took place between November 2020 and January 2021 among people with intellectual disabilities in reception centers receiving a grant from the Ministry of Women, National Solidarity, Family and Humanitarian Action. Data collection was done with a questionnaire adapted from the World Health Organization (WHO) and dental caries was recorded according to WHO criteria in decayed, missing or filled teeth generating a DMF index. Logistic regression was used to identify factors associated with the presence of dental caries. Results: A total of 193 participants were included in the study with an average age of 12.4 years ± 7.9. The overall prevalence of caries measured with the DMF index was 58.6% 95% CI [51.2 - 65.8]. It was significantly associated with female gender (OR = 4.2;95% CI [1.4 - 12.5], p = 0,01), the clinical form of mental illness (epilepsy OR = 3.8 95%;CI [1.2 - 12.7], p = 0,02, trisomy OR = 5.0;95% CI [1.1 - 22.9], p = 0,03, motor autonomy OR = 0.2 95%;CI [0.1 - 0.7], p = 0,01) and at use of toothpaste OR = 9.33;95% CI [1.05 - 82.7], p = 0,04. Conclusion: Dental caries remains a very present pathology in most people living with an intellectual disability. Also, it is necessary to put in place prevention strategies to reduce its prevalence and improve access to oral care for these people.

关键词： Dental Caries Mental Disability Intellectual Disability Associated Factors Ouagadougou

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Cardiac Surgery at Yaoundé General Hospital by a Local Team: Activity Report from September 2022 to January 2024

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World Journal of Cardiovascular Surgery 2024年第6期14卷 87-94页

作者： Laurence carole Ngo Yon Charles Mve Mvondo Hermann Nestor Tsague Kengni Zephanie Kobe Fokalbo Sépolin Lowe Mireille Dakleu Alain Patrick Menanga William Ngatchou Djomo Vincent De Paul Djientcheu Department of Cardiothoracic and Vascular Surgery Yaound General Hospital Yaound Cameroon Department of Surgery and Specialities Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Department of Clinical Sciences Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Department of Clinical Sciences Faculty of Medicine and Biomedical Sciences University of Yaound Yaound Cameroon Department of Surgery and Specialities Faculty of Medicine and Biomedical Sciences University of Yaound Yaound Cameroon

Introduction: The practice of cardiac surgery (CS) in sub-Saharan Africa faces a number of challenges. We report on the surgical activities of the first 17 months of the program launched at the Yaoundé General Hospital (YGH), describing the types of interventions and the early results. Patients and Methods: This was a descriptive cross-sectional study including patients who underwent CS from September 2022 to January 2024 at the YGH. Clinical, operative and postoperative data were collected and analysed retrospectively by R software. Results: A total of 37 patients underwent CS during the study period, divided into 23 (62.2%) open-heart and 14 (37.8%) closed-heart cases. Males predominated (sex ratio 1.17). The median age and interquartile range (IQR) were 36 years (9 - 51). Isolated valve surgery, in 15 (40.5%) cases, was the most common procedure in open-heart surgery cases. Closed-heart surgery involved closure of the patent ductus arteriosus in 9 (24.3%) cases, coronary artery bypass grafting in 3 (8.1%) cases, and pericardectomy in 2 (5.4%) cases. The median duration of extracorporeal circulation and aortic cross-clamping was 101 min (IQR 84 - 143) and 74 min (IQR 54 - 112) respectively. The median duration of mechanical ventilation was 2 hours (IQR 2 - 3). The median intensive care unit stay and median hospital stay were 2 days (IQR 2 - 3) and 7 days (IQR 5 - 8) respectively. Operative mortality was 2 (5.4%). Conclusion: Cardiac surgery remains a major challenge for African populations. The early results achieved by the local team are satisfactory. An increase in surgical activity should be strongly encouraged to facilitate local training and ensure the sustainability of the activity.

关键词： Cardiac Surgery Sub-Saharan Africa Cameroon

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Long Term Administration of Lannea acida Rich. (Anacardiaceae) Reverses the Imidacloprid-Induced Fertility Impairments in Adult Male Rat through Androgenic and Antioxidant Properties

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Journal of Biosciences and Medicines 2024年第3期12卷 62-76页

作者： Aimé Césaire Momo Tetsatsi Gladis Komguep Djuidje Prechmy carole Ngueyong Nsamou Karl Gombeu Zeugang Yannick Tchatat Petnga Désiré Alumeti Munyali Esther Ngadjui Pepin Alango Nkeng-Effouet Pierre Watcho Faculty of Health Sciences The University of Bamenda Bamenda Cameroon Animal Physiology and Phytopharmacology Laboratory Faculty of Science University of Dschang Dschang Cameroon Laboratory of Immunology and Molecular Biology The Evangelical University of Cameroon Bandjoun Cameroon School of Medicine and Community Health Evangelical University in Africa Bukavu DR Congo Alango Foundation Center for African Phytomedicine Dschang Cameroon

Aim: The harmful effects of pesticides have been largely documented in recent times. But effective therapeutic solutions to pesticide related male infertility are yet to be established. This study investigated the curative effects of Lannea acida on imidacloprid (IMI)-induced hypofertility in male Wistar rats. Methods: Rats of 150 – 200 g were administered IMI (22.5 mg/kg) for two weeks and partitioned into control (distilled water, vitamin E, clomiphene citrate) or test (aqueous (340 mg/kg), methanol (170 mg/kg) extract) groups for eight weeks treatment. Animals were sacrificed at the end of the treatment and samples were collected for sperm, antioxidant and hormonal analysis. Fertility tests were performed from treatment day 47 for fertility indices estimation. Results were expressed as mean ± SEM and one way ANOVA was applied using STATISTICA Software. Results: Exposition to IMI resulted in a significant decrease in sperm count, motility, viability and normality, testosterone and LH, coupled to an increase in oxidative stress markers. Moreover, IMI impaired male fertility evidenced by a significant drop in fertility index and litter size. Similar to clomiphene citrate and vitamin E, plant extracts significantly improved the sperm parameters, sexual hormones and decreased the oxidative stress markers. More importantly, the fertility index and litter size were restored, especially with the aqueous extract. Conclusion: Present results indicate that L. acida possesses curative potentials against IMI-induced hypofertility through its androgenic and antioxidant properties. However, the effects the extract on spermatozoa DNA structure and the fertility of offsprings from exposed parents are yet to be studied to conclude on total recovery from IMI toxicity.

关键词： Imidacloprid Lannea acida Hypofertility Male Rat

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Dissemination of Resistance Integrons and Genes Coding for Blse and Cabapenemases in the Urban Drainage Network in Cote d’Ivoire

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Advances in Microbiology 2024年第5期14卷 268-286页

作者： Coulibaly Kalpy Julien Diaby Aboubakar Sidik Vakou N’dri Sabine M’bengue Gbonon Valérie carole Claon Jean Stephane Yao Kouamé Eric Gnali Gbohounou Fabrice Yéo Yéfougnini Bagré Issa Djaman Allico Joseph Dosso Mireille Pasteur Institute of Ivory Coast Abidjan C&#244te d&#8217Ivoire Fé lix Houphou&#235t-Boigny University Abidjan C&#244te d&#8217Ivoire

Antibiotic resistance has become a major threat to human health worldwide. Environment, particularly the water environment, has long been overlooked as a player in the antibiotic resistance cycle, although its role remains unclear. These can provide an ideal setting for the acquisition and dissemination of antibiotic resistance, as they are frequently affected by anthropogenic activities. The objective of this study was to establish a diffusion map of resistance integrons used as genetic markers of resistance associated with antibiotic resistance conferring genes (ARGs). Total DNA extracts from non-cultivable bacterial communities were used for the analyses. These communities were obtained from wastewater samples from 14 sites upstream and downstream of drainage channels or effluents in the cities of Abidjan, Bouaké, and Yamoussoukro. The results obtained correspond to the number of positives among the treated samples (n = 39). Among the genetic markers of dissemination, class 1 integrons were the most evident in 94.8% of samples in Abidjan (93.3%), Bouaké (100%) and Yamoussoukro (91.6%). Class 2 integrons and class 3 integrons were found respectively in 41% and 51% of all samples. Genes coding for β-lactamases and blaTEM was identified in almost all samples at a rate of 97.4%. A co-presence of the three genes blaTEM, blaSHV and blaCTX-M is also remarkable in the sites of the city of Yamoussoukro. Among the genes coding for carbapenemases, only blaKPC 17.94%, blaNDM 30.76% and blaOXA48 38.46% were detected in the samples.

关键词： Antibiotic Resistance Wastewater Resistance Integrons (RIs) Resistance Genes

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Morphological Characterization of Arbuscular Mycorrhizal Fungi Associated with the Rhizosphere According to the Age of Xanthosoma sagittifolium L. Schott Plants in the Field

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American Journal of Plant Sciences 2024年第3期15卷 161-179页

作者： Audrey Maguy Bengono Nyimiebolo Astride carole Djeuani Hermann Désiré Mbouobda Antoine Marie Kevin Tiki Theresa Akinimbom Moma Diobe Motassy Manuela Samuel Brice Adounga Christophe Fendju Pangueko Jones Nshanji Issofa Nguetrapouna Rose Theophine Derricka Djem Moutamal A. Ziem Amang Amang Nicolas Niemenak Laboratory of Plant Physiology Department of Biological Sciences Higher Teacher Training College (HTTC) University of Yaoundé I Yaoundé Cameroon Department of Plant Biology Faculty of Sciences University of Yaoundé I Yaoundé Cameroon Department of Biology Higher Teacher Training College Bambili (HTTC) The University of Bamenda Bamenda Cameroon Departments of Microbiology Faculty of Science University of Yaoundé 1 Yaoundé Cameroon

The objective of this work was to carry out a morphological characterization of arbuscular mycorrhizal fungi in the rhizosphere of Xanthosoma sagittifolium L. Schott plants. The plant material used was the white and red cultivars of X. sagittifolium, belonging to age intervals of 3 - 6, 6 - 9, and 9 - 12 months. Three harvest sites were chosen in the Central Region of Cameroon. In each site, soil from the rhizosphere and plant roots was collected in a randomized manner. In the field, the agronomic parameters were evaluated. The physicochemical characteristics of the soils, the mycorrhization index, and the morphological characterization of the mycorrhizal types of each site were carried out. The results obtained show that the agronomic growth parameters varied significantly using the Student Newman and Keuls Test depending on the harvest sites. The soils’ pH in all sites was acidic and ranged between 4.6 and 5.8. The Nkometou site has a loamy texture while the Olembe and Soa sites have loam-clay-sandy and loam-clay textures respectively. The highest mycorrhization frequencies appeared at the Nkometou site, with 75 and 87.33% of the white and red cultivars plant roots at 6 - 9 and 3 - 6 months. The relative abundance of AMF arbuscular mycorrhizal fungal spores in the rhizosphere of X. sagittifolium plants varied with age and cultivar. There were 673 spores between 9 - 12 months in Nkometou in the red cultivar. Six AMF genera were identified in all the different soils collected: Acaulospora sp., Funneliformis sp., Gigaspora sp., Glomus sp., Scutellospora sp., and Septoglomus sp. The genus Glomus sp. was the most present at all age intervals in both cultivars.

关键词： Xanthosoma sagittifolium L. Schott Rhizosphere Harvest Site Arbuscular Mycorrhizal Fungi Diversity

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Cell-specific pathways recruited for symbiotic nodulation in the Medicago truncatula legume

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Molecular Plant 2022年第12期15卷 1868-1888页

作者： Sergio Alan Cervantes-Pérez Sandra Thibivilliers carole Laffont Andrew D.Farmer Florian Frugier Marc Libault Department of Agronomy and Horticulture Center for Plant Science InnovationUniversity of Nebraska-LincolnLincolnNE 68503USA Single Cell Genomics Core Facility Center for BiotechnologyUniversity of Nebraska-LincolnLincolnNE 68588USA Institute of Plant Sciences Paris-Saclay(IPS2) UniversitéParis-SaclayCNRSINRAEUniversitéParis-CitéUniversitéd’Evry91190 Gif-sur-YvetteFrance National Center for Genome Resources Santa FeNM 87505USA

Medicago truncatula is a model legume species that has been studied for decades to understand the symbiotic relationship between legumes and soil bacteria collectively named rhizobia.This symbiosis called nodulation is initiated in roots with the infection of root hair cells by the bacteria,as well as the initiation of nodule primordia from root cortical,endodermal,and pericycle cells,leading to the development of a new root organ,the nodule,where bacteria fix and assimilate the atmospheric dinitrogen for the benefit of the plant.Here,we report the isolation and use of the nuclei from mock and rhizobia-inoculated roots for the single nuclei RNA-seq(sNucRNA-seq)profiling to gain a deeper understanding of early responses to rhizobial infection in Medicago roots.A gene expression map of the Medicago root was generated,comprising 25 clusters,which were annotated as specific cell types using 119 Medicago marker genes and orthologs to Arabidopsis cell-type marker genes.A focus on root hair,cortex,endodermis,and pericycle cell types,showing the strongest differential regulation in response to a short-term(48 h)rhizobium inoculation,revealed not only known genes and functional pathways,validating the sNucRNA-seq approach,but also numerous novel genes and pathways,allowing a comprehensive analysis of early root symbiotic responses at a cell type-specific level.

关键词： Medicago root single-cell transcriptomic rhizobium nodule initiation root hair cells cortical cells

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Lower Extremity Arterial Disease in Patients with Type 2 Diabetes: Prevalence and Associated Factors at the Libreville University Hospital Center

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World Journal of Cardiovascular Diseases 2024年第5期14卷 295-308页

作者： Allognon Mahutondji Christian Ayo Bivigou Elsa Ntoutoume Mvé Dylan Anthony N’nang Jean-Fidel Kinga Armel Mpori Jamila Myrtille Akagah Kondé Christelle Ndoume Obiang Francis Yékini carole Fadylath Ndjibah Alakoua Cajole Ludvine Babongui Boussougou Latifah Mipinda Jean-Bruno Moubamba Franck Ecke Nzengue Jean-Emmanuel Houenassi Dèdonougbo Martin Boguikouma Jean-Bruno Department of Medicine and Medical Specialties Health Sciences University (USS) Libreville Gabon Cardiology Service Libreville University Hospital Center (CHUL) Libreville Gabon Department of Physiology Health Sciences University Libreville Gabon Amissa Bongo Regional Hospital Franceville Gabon Mother-Child Hospital Center Jeanne Ebori Foundation Libreville Gabon Medicine Service Owendo University Hospital Center Owendo Gabon

Introduction: Lower extremity arterial disease in diabetic patients has distinct characteristics. Objectives: To study the hospital frequency of lower extremity arterial disease and identify associated factors in diabetic patients at the Libreville University Hospital Center (CHUL). Materials and Methods: This was a cross-sectional study conducted from July 1, 2023, to January 31, 2024, in the endocrinology department of the CHUL. All patients with type 2 diabetes over the age of 18 admitted to this department, regardless of the reason for hospitalization, who provided informed consent, were included. Socio-demographic data and cardiovascular risk factors were recorded. Personal and family cardiovascular history and functional symptoms were investigated. The physical examination included measuring blood pressure, heart rate, and the ankle-brachial index in all patients. Results: A total of 219 patients were included, of whom 75 had lower extremity arterial disease, representing a prevalence of 34.24%. It was compensated in 28 cases (37.33%) and decompensated in 39 patients (52%). In eight cases (10.67%), there was critical chronic ischemia. Cardiovascular risk factors associated with diabetes were physical inactivity (89.5%), hypertension (55.25%), overweight (49.77%), obesity (22.84%), and smoking (10.04%). In multivariate analysis, only hypertension (OR = 2.09;95% CI: 1.05 - 4.17;p = 0.035) and LDL cholesterol (OR = 2.75;95% CI: 1.10 - 6.85;p = 0.03) were significantly associated with lower extremity arterial disease in diabetics at the University Hospital of Libreville. Conclusion: Lower extremity arterial disease is common in diabetic patients at the University Hospital of Libreville. It is often asymptomatic, thus requiring systematic screening.[-rId11-]

关键词： Lower Extremity Arterial Disease Diabetes Hypertension Ankle-Brachial Index Gabon

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