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https://www.readbyqxmd.com/read/29328649/phenylthiomethyl-ketone-based-fragments-show-selective-and-irreversible-inhibition-of-enteroviral-3c-proteases
#1
Robert Schulz, Amira Atef, Daniel Becker, Franziska Gottschalk, Carolin Tauber, Stefan Wagner, Christoph Arkona, Atef A Abdel-Hafez, Hassan H Farag, Jörg Rademann, Gerhard Wolber
Lead structure discovery mainly focuses on the identification of noncovalently binding ligands. Covalent linkage, however, is an essential binding mechanism for a multitude of successfully marketed drugs although discovered by serendipity in most cases. We present a concept for the design of fragments covalently binding to proteases. Covalent linkage enables fragment binding unrelated to affinity to shallow protein binding sites and at the same time allows differentiated targeted hit verification and binding location verification through mass spectrometry...
January 12, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29317884/evaluation-of-the-anti-schistosomal-effects-of-turmeric-curcuma-longa-versus-praziquantel-in-schistosoma-mansoni-infected-mice
#2
Atef Hussein, Samia Rashed, Ibrahim El Hayawan, Rabab El-Sayed, Hemat Ali
Background: Curcumin is the major active ingredient of Curcuma longa L., traditionally known as turmeric and has been shown to exhibit a wide range of pharmacological activities including anti-parasitic effect. However, it is found to be water-insoluble and has low bioavailability. The aim of this study was to explore the potential role of turmeric solved in olive oil either alone or in combination with praziquantel (PZQ) in treatment of schistosomiasis mansoni. Methods: The whole turmeric powder suspended in olive oil (as a solvent) is indicated to S...
October 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/29278684/isolation-of-human-lymphocytes-with-high-yield-and-viability-from-the-gastrointestinal-and-female-reproductive-tract-of-a-humanized-drag-mouse
#3
Atef Allam, Kristina K Peachman, Rodrigo Aguilera-Olvera, Sofia Casares, Mangala Rao
The mucosal tissues of the gut and female reproductive tract (FRT) are susceptible to pathogen infections including bacteria, viruses, and parasites, and are also the targets for immune disorders such as Crohn's disease, inflammatory bowel disease (IBD), and many types of cancers. However, the role of the mucosal immune cells to control these diseases is largely unknown. The limited availability of human mucosal biopsy tissue and the low number of cells that can be isolated from these tissues hampers the characterization of the phenotype and function of human mucosal immune cell subsets...
December 23, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29260646/epidemiology-of-campylobacter-infections-among-children-in-egypt
#4
Rebecca Sainato, Atef ElGendy, Frédéric Poly, Janelle Kuroiwa, Patricia Guerry, Mark S Riddle, Chad K Porter
Campylobacter is a frequently isolated bacterial pathogen among children with diarrhea. Data are lacking on the distribution and spectrum of disease associated with Campylobacter species and Campylobacter jejuni capsular polysaccharide (CPS) types. This information is essential because current vaccine research seeks to target specific CPS types. An effective CPS-conjugate vaccine will need to cover CPS types that are both common and associated with severe disease. The US Naval Medical Research Unit-3 conducted several prospective cohort studies researching diarrheal disease in Egypt from 1995 to 2003...
December 18, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29239242/fluconazole-loaded-solid-lipid-nanoparticles-topical-gel-for-treatment-of-pityriasis-versicolor-formulation-and-clinical-study
#5
Shaimaa El-Housiny, Maii Atef Shams Eldeen, Yasmina Ahmed El-Attar, Hoda A Salem, Dalia Attia, Ehab R Bendas, Mohamed A El-Nabarawi
Solid lipid nanoparticles (SLNs) are very potential formulations for topical delivery of antifungal drugs. Hence, the purpose of this research was to formulate the well-known antifungal agent Fluconazole (FLZ)-loaded SLNs topical gel to improve its efficiency for treatment of Pityriasis Versicolor (PV). FLZ-SLNs were prepared by modified high shear homogenization and ultrasonication method using different concentration of solid lipid (Compritol 888 ATO, Precirol ATO5) and surfactant (Cremophor RH40, Poloxamer 407)...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29238165/synthesis-characterization-and-antimicrobial-evaluation-of-novel-5-benzoyl-n-substituted-amino-and-5-benzoyl-n-sulfonylamino-4-alkylsulfanyl-2-pyridones
#6
Galal Elgemeie, Farag Altalbawy, Mohammed Alfaidi, Rania Azab, Atef Hassan
The present research describes the synthesis of novel 5-benzoyl-N-substituted-amino- and 5-benzoyl-N-sulfonylamino-4-alkylsulfanyl-2-pyridones 5a-c and 6a-c via the reaction of 2-benzoyl-3,3-bis(alkylthio)acrylonitriles 2a-c with N-cyanoacetohydrazide 3 and cyanoaceto-N-phenylsulfonylhydrazide 4, respectively. Also, the reactivity of the compounds 5a-c toward hydrazine hydrate to give product 1H-pyrazolo[4,3-c]pyridine derivative 7 was studied. In addition, the reactivity of the 2a-c toward 1-cyanoacetyl-4 arylidenesemicarbazides 8a-c afforded 3,5-dihydro[1,2,4]triazolo[1,5-a]pyridine-6-carbonitrile derivatives (12-14)a-c, which reacted with hydrazine hydrate to give 3H-pyrazolo[4,3-c][1,2,4]triazolo[1,5-a]pyridine-6-carbonitrile derivatives 15a-c...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29211404/management-of-long-segment-anterior-urethral-stricture-%C3%A2-8cm-using-buccal-mucosal-bm-graft-and-penile-skin-ps-flap-outcome-and-predictors-of-failure
#7
Gamal A Alsagheer, Atef Fathi, Mohamed Sayed Abdel-Kader, Ahmed M Hasan, Omar Mohamed, Osama Mahmoud, Ahmad Abolyosr
PURPOSE: To evaluate the surgical outcome and predictors of failure of substitution urethroplasty using either dorsal onlay buccal mucosal (BM) graft or ventral onlay penile skin flap (PS) for anterior urethral stricture ≥ 8cm. PATIENTS AND METHODS: Between March 2010 and January 2016, 50 patients with anterior urethral stricture ≥ 8 cm were treated at our hospital. The surgical outcome and success rate were assessed. The predictors of failure were analyzed using multivariate analysis...
December 7, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/29204179/effects-of-cornus-mas-fruit-hydro-methanolic-extract-on-serum-antioxidants-lipid-profile-and-hematologic-parameters-following-cisplatin-induced-changes-in-rats
#8
Atefe Mohammadzadeh Vardin, Bita Abdollahi, Morteza Kosari-Nasab, Mehran Mesgari Abbasi
Cisplatin (Cis) has serious adverse side-effects that limit its clinical use. The mechanism underlying the effects is complex, including mitochondrial oxidative stress and inflammation. This study investigated whether Cornus mas, a fruit with high antioxidant contents, hydro-methanolic extract (CME) can modulate the cisplatin-induced changes. Forty Wistar rats were divided into a control group, Cis group, CME group, CME 300 + Cis group, and the CME 700 + Cis group. After the intervention, blood samples were taken for biochemical and hematological analysis...
December 2017: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29202709/transcriptomic-and-metabolic-responses-of-calotropis-procera-to-salt-and-drought-stress
#9
Mohammed Z Mutwakil, Nahid H Hajrah, Ahmed Atef, Sherif Edris, Mernan J Sabir, Areej K Al-Ghamdi, Meshaal J S M Sabir, Charlotte Nelson, Rania M Makki, Hani M Ali, Fotouh M El-Domyati, Abdulrahman S M Al-Hajar, Yoann Gloaguen, Hassan S Al-Zahrani, Jamal S M Sabir, Robert K Jansen, Ahmed Bahieldin, Neil Hall
BACKGROUND: Calotropis procera is a wild plant species in the family Apocynaceae that is able to grow in harsh, arid and heat stressed conditions. Understanding how this highly adapted plant persists in harsh environments should inform future efforts to improve the hardiness of crop and forage plant species. To study the plant response to droμght and osmotic stress, we treated plants with polyethylene glycol and NaCl and carried out transcriptomic and metabolomics measurements across a time-course of five days...
December 4, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29195163/environmental-impacts-of-heavy-metals-rare-earth-elements-and-natural-radionuclides-in-marine-sediment-from-ras-tanura-saudi-arabia-along-the-arabian-gulf
#10
Atef El-Taher, Fatimh Alshahri, Reda Elsaman
Ras Tanura city is one of the most important cities in Saudi Arabia because of the presence of the largest and oldest oil refinery in the Middle East which was began operations in September 1945. Also its contains gas plant and two ports. The concentration of natural radionuclides, heavy metals and rare earth elements were measured in marine sediment samples collected from Ras Tanura. The specific activities of 238U, 226Ra, 232Th, 40K and 137Cs (Bq/kg) were measured using A hyper-pure Germanium detector (HPGe), and ranged from (20...
November 20, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29194927/computer-guided-sinus-floor-elevation-through-lateral-window-approach-with-simultaneous-implant-placement
#11
Ahmed H Osman, Hesham Mansour, Mohammed Atef, Maha Hakam
BACKGROUND: The introduction of CAD/CAM technology in implant dentistry has marked a new era, allowing various procedures to be carried out with a level of great precision and accuracy. PURPOSE: The aim of the present study is to compare the efficacy of a CAD/CAM generated surgical cutting guide in the reduction of incidence of membrane perforation during maxillary sinus floor elevation in relation to the standard lateral window approach technique. MATERIALS AND METHODS: Twenty cases of maxillary sinus elevation were randomly divided into 2 groups...
December 1, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29187162/isolation-and-characterization-of-a-new-naturally-immortalized-human-breast-carcinoma-cell-line-kaimrc1
#12
Rizwan Ali, Nosaibah Samman, Hajar Al Zahrani, Atef Nehdi, Sabhi Rahman, Abdul Latif Khan, Mohamed Al Balwi, Lolwah Abdullah Alriyees, Manal Alzaid, Ahmed Al Askar, Mohamed Boudjelal
BACKGROUND: Breast cancer is one of the most common cancer and a leading cause of death in women. Up to date the most commonly used breast cancer cell lines are originating from Caucasians or Afro-Americans but rarely cells are being derived from other ethnic groups. Here we describe for the first time the establishment of a naturally transformed breast cancer cell line, KAIMRC1 from an Arab woman of age 62 suffering from stage IIB breast cancer (T2N1M0). Moreover, we have characterized these cells for the biological and molecular markers, induction of MAPK pathways as well as its response to different commercially available drugs and compounds...
November 29, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29183698/titanium-and-polyether-ether-ketone-peek-patient-specific-sub-periosteal-implants-two-novel-approaches-for-rehabilitation-of-the-severely-atrophic-anterior-maxillary-ridge
#13
M Mounir, M Atef, A Abou-Elfetouh, M M Hakam
The aim of this study was to assess two new protocols for single-stage rehabilitation of the severely atrophic maxillary ridge using customized porous titanium or polyether ether ketone (PEEK) sub-periosteal implants. Ten patients with a severely atrophic anterior maxillary alveolar ridge were divided randomly into two groups (five patients in each) to receive customized sub-periosteal implants fabricated via CAD/CAM technology: group 1, porous titanium implants; group 2, PEEK implants. Prosthetic loading with fixed acrylic bridges was performed 1 month postoperative...
December 1, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29166921/identification-of-epidermal-growth-factor-receptor-positive-glioblastoma-using-lipid-encapsulated-targeted-superparamagnetic-iron-oxide-nanoparticles-in-vitro
#14
Huai-Lu Chen, Fei-Ting Hsu, Yu-Chieh Jill Kao, Hua-Shan Liu, Wan-Zhen Huang, Chia-Feng Lu, Ping-Huei Tsai, Ahmed Atef Ahmed Ali, Gilbert Aaron Lee, Ray-Jade Chen, Cheng-Yu Chen
BACKGROUND: Targeted superparamagnetic iron oxide (SPIO) nanoparticles have emerged as a promising biomarker detection tool for molecular magnetic resonance (MR) image diagnosis. To identify patients who could benefit from Epidermal growth factor receptor (EGFR)-targeted therapies, we introduce lipid-encapsulated SPIO nanoparticles and hypothesized that anti-EGFR antibody cetuximab conjugated of such nanoparticles can be used to identify EGFR-positive glioblastomas in non-invasive T2 MR image assays...
November 22, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29163641/isolation-and-characterization-of-thermophilic-bacteria-from-jordanian-hot-springs-bacillus-licheniformis-and-thermomonas-hydrothermalis-isolates-as-potential-producers-of-thermostable-enzymes
#15
Balsam T Mohammad, Hala I Al Daghistani, Atef Jaouani, Saleh Abdel-Latif, Christian Kennes
The aim of this study was the isolation and characterization of thermophilic bacteria from hot springs in Jordan. Ten isolates were characterized by morphological, microscopic, biochemical, molecular, and physiological characteristics. Sequencing of the 16S rDNA of the isolates followed by BLAST search revealed that nine strains could be identified as Bacillus licheniformis and one isolate as Thermomonas hydrothermalis. This is the first report on the isolation of Thermomonas species from Jordanian hot springs...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/29163484/tracking-human-immunodeficiency-virus-1-infection-in-the-humanized-drag-mouse-model
#16
Jiae Kim, Kristina K Peachman, Ousman Jobe, Elaine B Morrison, Atef Allam, Linda Jagodzinski, Sofia A Casares, Mangala Rao
Humanized mice are emerging as an alternative model system to well-established non-human primate (NHP) models for studying human immunodeficiency virus (HIV)-1 biology and pathogenesis. Although both NHP and humanized mice have their own strengths and could never truly reflect the complex human immune system and biology, there are several advantages of using the humanized mice in terms of using primary HIV-1 for infection instead of simian immunodeficiency virus or chimera simian/HIV. Several different types of humanized mice have been developed with varying levels of reconstitution of human CD45(+) cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29159667/uterus-sparing-vaginolaparoscopic-sacrocolpopexy-for-apical-pelvic-organ-prolapse
#17
Atef Darwish, Mostafa Bahlol, AbdelGhafar Ahmad, Mohamed Fekry
INTRODUCTION AND HYPOTHESIS: Our aim was to evaluate the safety, feasibility, and effectiveness of a vaginolaparoscopic sacrocolpopexy (VLS) technique for treating apical pelvic organ prolapse (POP). MATERIALS AND METHODS: This was a prospective interventional case series (design classification: Canadian Task Force II3) performed in the endoscopic unit of a tertiary care referral facility and university hospital. We assessed 15 symptomatic parous women with stage ≥2 apical POP according to the POP Quantification (POP-Q) classification...
November 20, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/29142785/role-of-cord-blood-and-bone-marrow-mesenchymal-stem-cells-in-recent-deep-burn-a-case-control-prospective-study
#18
Wael Abo-Elkheir, Fawzy Hamza, Ahmed M Elmofty, Atef Emam, Magdy Abdl-Moktader, Sameh Elsherefy, Hala Gabr
RATIONALE: Burn injuries represent one of the major worldwide public health problems causing more severe physiological stress than other traumas. Effective treatment of burn injuries is mandatory to prevent the numerous life-threatening complications and possible disabilities. Stem cells, a population of multipotent cells retaining the properties of self-renewal and differentiation, are the main player in tissue regeneration after major trauma. Thus, they are thought to play a key role in wound healing inducing efficient and physiological skin regeneration...
2017: American Journal of Stem Cells
https://www.readbyqxmd.com/read/29138113/prevalence-of-extended-spectrum-beta-lactamase-and-carbapenemase-encoding-genes-in-poultry-feces-from-algeria-and-marseille-france
#19
Chabou Selma, Leulmi Hamza, Davoust Bernard, Aouadi Atef, Jean-Marc Rolain
OBJECTIVE: The aim of this study was to evaluate the prevalence of extended-spectrum beta lactamase (ESBLs) and carbapenemase-encoding genes in poultry from Algeria and Marseille, France. MATERIALS AND METHODS: The samples consisted of feces from broilers from France and Algeria between 2014 and 2015. DNA extraction and quantitative PCR were performed on 833 fecal samples to screen for the presence of ESBLs (TEM, SHV, CTX-M) and carbapenemase-encoding genes (NDM, OXA48, OXA58)...
November 11, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29137693/another-chance-at-life-jordanian-patients-experience-of-going-through-a-myocardial-infarction
#20
Ali Ahmad Ammouri, Joy Kabasindi Kamanyire, Ahmad H Abu Raddaha, Susan Achora, Arwa Atef Obeidat
BACKGROUND AND PURPOSE: Myocardial infarction (MI) is a life-threatening health condition that has physical, spiritual, emotional, and social changes. Understanding feelings and thoughts of patients who suffered MI attacks is essential to recovery. Among Jordanian patients who suffered an acute attack of MI, the aim of the study was to describe the experiences and the varied meanings that they assign to their experiences. METHODS: A qualitative hermeneutic phenomenological research design was used...
November 1, 2017: Research and Theory for Nursing Practice
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