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Anticancer Activities and QSAR Study of Novel Agents with a Chemical Profile of Benzimidazolyl-Retrochalcone

Open Journal of Medicinal Chemistry 2020年第3期10卷 113-127页

作者： Ouattara Mahama koné aboudramane koné Soleymane Collet Sylvain Diomandé Sekou Sissouma Drissa Department of Therapeutic Chemistry and Organic Chemistry UFR SPB FHB University Abidjan C&#244 te d’Ivoire Department of Chemistry UFR Environment Jean LorougnonGuédé University Daloa C&#244 te d’Ivoire Laboratory of Organic Chemistry and Natural Substances UFR SSMT FHB University Abidjan C&#244 te d’Ivoire Chemistry and Interdisciplinarity: Synthesis Analysis Modelling (CEISAM) University of Nantes Nantes France

The present pharmacochemical and modelling work focused on a benzimidazolyl-chalcone series. These previously synthesized compounds were evaluated in vitro for their anticancer activities against a panel of seven human cancer cell lines and normal fibroblasts. Among the new benzimidazole-supported chalcones, nine (9) compounds (compounds 1 - 4, 6 - 8 and compounds 10 and 11) showed promising anticancer activities with IC50s ranging from 0.83 to 2.58 μM. Compounds 2 and 6 with IC50s of 0.83 and 0.86 μM, respectively, were shown to be potent inhibitors of HCT-116 colon cancer cell proliferation. It was therefore necessary, for a development of this new series of chalcones, to establish through a QSAR study, their quantum descriptors according to the DFT calculation method and following the B3LYP/6-31+G (d,p) theory. These descriptive and predictive studies focused on the colon HCT 116 cell line which was found to be more sensitive to the anticancer action of our benzimidazolyl-retrochalcones. QSAR study showed that the electronic energy (Eelec), lipophilicity (logP), chemical softness (S) and chemical hardness (η) of benzimidazolyl-retrochalcones play an important role in inhibiting cancer cell proliferation.

关键词： Retrochalcone Benzimidazole Anticancer Agents QSAR Quantum Descriptors DFT Method

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Combining Experimental and Quantum Chemical Study of 2-(5-Nitro-1,3-Dihydro Benzimidazol-2-Ylidene)-3-Oxo-3-(2-Oxo-2H-Chromen-3-yl) Propanenitrile as Copper Corrosion Inhibitor in Nitric Acid Solution

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Open Journal of Physical Chemistry 2022年第4期12卷 47-70页

作者： Mougo André Tigori aboudramane koné Bamba Souleymane Doumadé Zon Drissa Sissouma Paulin Marius Niamien Laboratoire des Sciences et Technologies de l’Environnement UFR Environnement Université Jean Lorougnon Guédé Daloa C&#244 te d’Ivoire UFR des Sciences Biologiques Université Péléforo Gon Coulibaly Korhogo C&#244 te d’Ivoire Laboratoire de Constitution et de Réaction de la Matière UFR SSMT Université Félix Houphou&#235 t-Boigny Abidjan C&#244 te d’Ivoire

Due to acidic solutions aggressiveness, corrosion inhibitors use is considered to be one the most practical methods to delay metals dissolution in the said solutions. In this study benzimidazolyl derivative namely 2-cyanochalcones 2-(5-nitro-1,3-dihydrobenzimidazol-2-ylidene)-3-oxo-3-(2-oxo-2H-chromen-3-yl) propanenitrile which was synthesized was then applied as a corrosion inhibitor for copper in 1 M HNO3 solution. The inhibition action of this molecule was evaluated by gravimetric and density functional theory (DFT) methods. It was found experimentally that this compound has a better inhibition performance and its adsorption on copper surface follows Langmuir adsorption isotherm. This adsorption evolves with temperature and inhibitor concentration, it is endothermic and occurs spontaneously with an increase in disorder. Corrosion kinetic parameters analysis supported by Adejo-Ekwenchi model revealed the existence of both physisorption and chemisorption. DFT calculations related that compound adsorption on copper surface is due to its electron donating and accepting capacity. The reactive regions specifying the electrophilic and nucleophilic attack sites were analyzed using Fukui and dual descriptor functions. Experimental results obtained were compared with the theoretical findings.

关键词： 2-Cyanochalcones2-(5-Nitro-1 3-Dihydrobenzimidazol-2-Ylidene)-3-Oxo-3-(2-Oxo-2H-Chromen-3-Yl) Propanenitrile Copper HNO3 Solution Gravimetric Density Functional Theory

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Mathematical Model of the Spread of the Coronavirus Disease 2019 (COVID-19) in Burkina Faso

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Applied Mathematics 2020年第11期11卷 1204-1218页

作者： aboudramane Guiro Blaise koné Stanislas Ouaro Département de Mathématiques UFR des Sciences et Techniques Université Nazi Boni de Bobo Dioulasso Bobo Dioulasso Burkina Faso LAboratoire de Mathématiques et Informatique (LAMI) Ouagadougou Burkina Faso Département de Mathématiques UFR des Sciences Exactes et Appliquées Université Joseph Ki Zerbo Ouagadougou Burkina Faso

In this paper, we develop a mathematical model of the COVID-19 pandemic in Burkina Faso. We use real data from Burkina Faso National Health Commission against COVID-19 to predict the dynamic of the disease and also the cumulative number of reported cases. We use public policies in model in order to reduce the contact rate, this allows to show how the reduction of the daily report of infectious cases goes, so we would like to draw the attention of decision makers for a rapid treatment of reported cases.

关键词： COVID-19 Statistics Data Exposed Person Reported and Unreported Cases Mathematical Model Public Policies Basic Reproduction Number Prediction

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Giant Aneurysmal Bone Cyst of the Right Femur about a Case

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Open Journal of Radiology 2023年第3期13卷 139-145页

作者： Cheick Oumar Keïta aboudramane konaté Yacouba Drissa Traoré Youssouf koné Abdoulaye koné Issa Diarra Ilias Guindo Salia Coulibaly Mahamadou Diallo Siaka Sidibé Radiology Department Mohammed VI Perinatal Clinic Bamako Mali Radiology Department County Hospital of Sikasso Sikasso Mali Radiology Department CNAM Bamako Mali Radiology Department Jacques Boutard Hospital Center Saint Yrieix La Perche France Medical Imaging Department University Hospital of Point G Bamako Mali Medical Imaging Department University Hospital of Kati Kati Mali Medical Imaging Department Gabriel Touré University Hospital Bamako Mali

Aneurysmal bone cyst (ABC) is a rare bone tumor accounting for 1% - 4% of benign bone tumors. Its etiopathogenesis remains unknown. The main site is the metaphysis of the long bones. ABC occurs almost exclusively in young people, with a slight female predominance. We report an exceptional case of ABC of the femur with involvement of the right hip in a 16-year-old girl in the Medical Imaging Department of Pr Bocar Sidy Sall Hospital of Kati (Mali). We will discuss the clinical and radiological aspects of this pathology. Observation: Mrs N C., aged 16, was referred to the orthopaedic-traumatology department for an X-ray of the right thigh, indicated as having a large, disabling thigh. Clinical examination revealed a large thigh measuring 890 mm in circumference, compared with 300 mm on the contralateral side. Radiographically, the femur showed a blown appearance, with the cortex thinned and broken in places. Exceptionally, the lesion affected the entire femur. On CT scan, we found a voluminous fluid collection occupying the entire right femur, including the right femoral head and homolateral ischium. The cortex was interrupted in places, and the adjacent soft tissues were thinned or laminated, but not infiltrated. Histology revealed haemorrhagic and inflammatory elements compatible with the diagnosis of ABC. Conclusion: ABC is a tumor entity that is often difficult to diagnose. Medical imaging, topographical distribution and histology form an indissociable whole to establish a diagnosis of certainty.

关键词： Aneurysmal Bone Cyst Medical Imaging Femur

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An infinite-dimensional representation of the Ray-Knight theorems

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Science China Mathematics 2024年第1期67卷 149-162页

作者： Elie Aidékon Yueyun Hu Zhan Shi School of Mathematical Sciences Fudan UniversityShanghai 200433China LAGA UniversitéSorbonne Paris NordVilletaneuse 93430France Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

The classical Ray-Knight theorems for the Brownian motion determine the law of its local time process either at the first hitting time of a given value a by the local time at the origin,or at the first hitting time of a given position b by the Brownian *** extend these results by describing the local time process jointly for all a and b,by means of the stochastic integral with respect to an appropriate white *** result applies toμ-processes,and has an immediate application:aμ-process is the height process of a Feller continuous-state branching process(CSBP)with immigration(Lambert(2002)),whereas a Feller CSBP with immigration satisfies a stochastic differential equation(SDE)driven by a white noise(Dawson and Li(2012));our result gives an explicit relation between these two descriptions and shows that the SDE in question is a reformulation of Tanaka’s formula.

关键词： Ray-Knight theorem μ-process white noise Tanaka's formula

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Update on acute myeloid leukemia stem cells:New discoveries and therapeutic opportunities

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World Journal of Stem Cells 2016年第10期8卷 316-331页

作者： Maximilian Stahl Tae kon Kim Amer M Zeidan Section of Hematology Department of Internal MedicineYale School of Medicine

The existence of cancer stem cells has been wellestablished in acute myeloid leukemia. Initial proof of the existence of leukemia stem cells(LSCs) was accomplished by functional studies in xenograft models making use of the key features shared with normal hematopoietic stem cells(HSCs) such as the capacity of self-renewal and the ability to initiate and sustain growth of progenitors in vivo. Significant progress has also been made in identifying the phenotype and signaling pathways specific for LSCs. Therapeutically, a multitude of drugs targeting LSCs are in different phases of preclinical and clinical development. This review focuses on recent discoveries which have advanced our understanding of LSC biology and provided rational targets for development of novel therapeutic agents. One of the major challenges is how to target the selfrenewal pathways of LSCs without affecting normal HSCs significantly therefore providing an acceptable therapeutic window. Important issues pertinent to the successful design and conduct of clinical trials evaluating drugs targeting LSCs will be discussed as well.

关键词： Leukemia stem cells Cancer stem cells Acute myeloid leukemia Stem cell niche Xenotransplantation Plerixafor NF-κ B C-X-C chemokine receptor type 4

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Methyl Orange removal by a novel PEI-AuNPs-hemin nanocomposite

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Journal of Environmental Sciences 2017年第3期29卷 278-283页

作者： Weiwen Hu Xuehua Yu Qiong Hu Jinming kon Lianzhi Li Xueji Zhan School of Environmental and Biological Engineering Nanjing University of Science&TechnologyNanjing 210094China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000China Chemistry Department College of Arts and SciencesUniversity of South FloridaFL 33620-4202USA

A novel poly（ethyleneimine）/Au nanoparticles/hemin nanocomposite （PEI-AuNPs-Hemin） acting for Methyl Orange （MO） removal has been synthesized. PEI-AuNPs was prepared firstly and it was then linked to heroin through the coupling between carboxyl groups in hemin and amino groups in PEI without the activation of carboxyl groups. The high reactivity and stability of AuNPs contributed greatly in the formation of the amido bonds in the nanocomposite. Fourier transform infrared spectroscopy, transmission electron microscopy and UV-visible spectroscopy were used to characterize the PEI-AuNPs-Hemin. Results show that PEI-AuNPs-Hemin has strong adsorption for MO. Adsorption and degradation experiments were carried out at different pHs, nanocomposite concentrations and UV irradiation times. Removal of MO in acidic solutions was more effective than in basic solutions. The real-time study showed that the MO degradation with the nanocom- posite under UV irradiation was a fast process. In addition, the photocatalytic degradation mechanism was proposed. The study suggests that the PEI-AuNPs-Hemin may have promising applications in environmental monitoring and protection.

关键词： Poly(ethyleneimine)HeroinAu nanoparticleNanocompositeMethyl Orange removal

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Systematic review of diagnostic tools for peritoneal metastasis in gastric cancer-staging laparoscopy and its alternatives

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World Journal of Gastrointestinal Surgery 2023年第10期15卷 2280-2293页

作者： Si Ying Adelina Ho kon Voi Tay Lee kong Chian School of Medicine Singapore 308232Singapore Upper GI and Bariatric Division General SurgeryTan Tock Seng HospitalSingapore 308433Singapore Upper GI and Bariatric Division General SurgeryWoodlands HealthSingapore 768024Singapore

BACKGROUND Gastric cancer is one of the leading causes of cancer burden and mortality,often resulting in peritoneal metastasis in advanced stages with negative survival *** laparoscopy has become standard practice for suspected cases before a definitive gastrectomy or *** systematic review aims to compare the efficacy of other diagnostic modalities instead of staging laparoscopy as the alternatives are able to reduce cost and invasive staging ***,a radiomic model based on computed tomography and positron emission tomography(PET)has also emerged as another method to predict peritoneal *** To determine if the efficacy of computed tomography,magnetic resonance imaging and PET is comparable with staging *** Articles comparing computed tomography,PET,magnetic resonance imaging,and radiomic models based on computed tomography and PET to staging laparoscopies were filtered out from the Cochrane Library,EMBASE,PubMed,Web of Science,and Reference Citations Analysis(https://***/).In the search for studies comparing computed tomography(CT)to staging laparoscopy,five retrospective studies and three prospective studies were ***,five retrospective studies and two prospective studies were also included for papers comparing CT to PET *** one retrospective study and one prospective study were found to be suitable for papers comparing CT to magnetic resonance imaging *** Staging laparoscopy outperformed computed tomography in all measured aspects,namely sensitivity,specificity,positive predictive value and negative predictive *** resonance imaging and PET produced mixed results,with the former shown to be only marginally better than computed *** performed slightly better than PET in most measured domains,except in specificity and true negative *** speculate that this may be due to the limited F-fluorodeoxyglucose uptake in small peri

关键词： Gastric cancer Peritoneal metastases Computed tomography Positron emission tomography Magnetic resonance imaging Staging laparoscopy

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Experimental symmetric private information retrieval with measurement-device-independent quantum network

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Light(Science & Applications) 2022年第10期11卷 2399-2405页

作者： Chao Wang Wen Yu kon Hong Jie Ng Charles C.-W.Lim Department of Electrical&Computer Engineering National University of SingaporeSingaporeSingapore Centre for Quantum Technologies National University of SingaporeSingaporeSingapore

Secure information retrieval is an essential task in today's highly digitised *** some applications,it may be necessary that user query's privacy and database content's security are *** these settings,symmetric private information retrieval(SPIR)could be employed,but its implementation is known to be demanding,requiring a private key-exchange network as the base ***,we report for the first time a realisation of provably-secure SPIR supported by a quantum-secure key-exchange *** SPIR scheme looks at biometric security,offering secure retrieval of 582-byte fingerprint files from a database with 800 *** experimental results clearly demonstrate the feasibility of SPIR with quantum secure communications,thereby opening up new possibilities in secure distributed data storage and cloud computinq over the future Quantum Internet.

关键词： database network quantum

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Multiple-patterning colloidal lithography-implemented scalable manufacturing of heat-tolerant titanium nitride broadband absorbers in the visible to near-infrared

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Microsystems & Nanoengineering 2021年第2期7卷 51-58页

作者： Dasol Lee Myeongcheol Go Minkyung Kim Junho Jang Chungryong Choi Jin kon Kim Junsuk Rho Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)Pohang37673Republic of Korea Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)Pohang37673Republic of Korea National Institute of Nanomaterials Technology(NINT) Pohang37673Republic of Korea

Broadband perfect absorbers have been intensively researched for decades because of their near-perfect absorption optical property that can be applied to diverse applications. Unfortunately, achieving large-scale and heat-tolerant absorbers has been remained challenging work because of costly and time-consuming lithography methods and thermolability of materials, respectively. Here, we demonstrate a thermally robust titanium nitride broadband absorber with >95% absorption efficiency in the visible and near-infrared region (400–900 nm). A relatively large-scale (2.5 cm × 2.5 cm) absorber device is fabricated by using a fabrication technique of multiple-patterning colloidal lithography. The optical properties of the absorber are still maintained even after heating at the temperatures >600 ∘C. Such a large-scale, heat-tolerant, and broadband near-perfect absorber will provide further useful applications in solar thermophotovoltaics, stealth, and absorption controlling in high-temperature conditions.

关键词： absorber titanium absorption

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