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Ramadan Abdelaziz, Yasser Abd El-Rahman, Sophie Wilhelm
Chromite is widely distributed in the east and southeast of Afghanistan, especially in Logar Province. Chromite mineralization is podiform-type and is hosted in the stratigraphically lowest ultramafic rocks of the Logar Ophiolite Complex. This ophiolite complex represents a remnant of an early Cretaceous oceanic crust that was thrusted over a late Permian to Mid-Jurassic platform-type sequence of the Kabul Terrane during the Himalayan Orogeny. The ultramafic rocks are composed mainly of dunite and harzburgite, which are variably serpentinized...
February 2018: Heliyon
Mohamed M El-Wekil, Ashraf M Mahmoud, Saad A Alkahtani, Adel A Marzouk, Ramadan Ali
Novel and sensitive electrochemical sensor was fabricated for the assay of anti-HCV ledipasvir (LEDV) in different matrices. The designed sensor was based on 3D spinel ferromagnetic NiFe2 O4 nanospheres and reduced graphene oxide (RGO) supported by morpholinium acid sulphate (MHS), as an ionic liquid (RGO/NSNiFe2 O4 /MHS). This sensor design was assigned to synergistically tailor the unique properties of nanostructured ferrites, RGO, and ionic liquid to maximize the sensor response. Electrode modification prevented aggregation of NiFe2 O4, increasing electroactive surface area and allowed remarkable electro-catalytic oxidation of LEDV with an enhanced oxidation response...
March 11, 2018: Biosensors & Bioelectronics
Adel Abdel-Moneim, Alaa Aboud, Mohamed Abdel-Gabbar, Mohamed Zanaty, Mohamed Ramadan
BACKGROUND: The current standard of care for patients with chronic hepatitis C virus (HCV) infection is a combination of direct-acting antiviral agents (DAAs). However, rare clinical trials have been reported on the combination regimen of sofosbuvir (SOF) with ombitasvir, paritaprevir, and ritonavir (OBV/PTV/r) plus ribavirin (RBV) for treated patients with HCV genotype 4 (GT4) infection. AIMS: To clarify the retreatment efficacy and safety of the recent regimen, SOF with OBV/PTV/r + RBV, for chronic HCV GT4-experienced patients who failed treatment with DAA-based regimens...
March 15, 2018: Digestive Diseases and Sciences
Wahid Bouida, Kaouthar Beltaief, Houda Baccouche, Mouna Sassi, Zohra Dridi, Imen Trabelsi, Kamel Laaouiti, Taher Chakroun, Ilhem Hellara, Riadh Boukef, Nabil Sakly, Mohsen Hassine, Faouzi Added, Rabie Razgallah, Fadhel Najjar, Semir Nouira
AIMS: Ramadan fasting (RF) may affect aspirin resistance. We conducted this study in patients with cardiovascular risk (CVR) factors to assess the effect of RF on aspirin resistance and explore whether type 2 diabetes mellitus (DM) would influence this effect. METHODS: A total of 177 stable patients with ≥2 CVR factors were recruited. All patients observed RF and were taking aspirin. Physical exam and standard biological tests including glycaemia and serum lipids data were performed before Ramadan (Pre-R), at the last week of Ramadan (R) and four weeks after the end of Ramadan (Post-R)...
2018: PloS One
Lauren Rumble, Ali Aulia Ramly, Mu'man Nuryana, Michael P Dunne
Nationally representative research into violence against children is necessary to understand the scale and complexity of such violence and to evaluate prevention efforts. To date, however, most countries do not have adequate data. In 2013, the government of Indonesia conducted a national Violence Against Children Survey (VACS). This was a cross-sectional household survey of male and female 13-to-24- year-olds designed to estimate physical, emotional, and sexual violence prevalence. The target was to interview at least 2580 individuals; but response rates were much lower than anticipated (females = 66...
2018: Child Indicators Research
Nesreen A Safwat, Mona T Kashef, Ramy K Aziz, Khadiga F Amer, Mohammed A Ramadan
Tuberculosis remains a major health problem accentuated by the rise of resistance to all available drugs. Therefore, this study was launched to discover a novel antituberculosis agent from wild Egyptian Sahara plants. Twelve such plants were screened, in vitro, for their activity against various Mycobacterium species. The most active plant, Euphorbia paralias, was further fractionated with different organic solvents, and the activity of the obtained fractions was determined by the agar diffusion and broth microdilution methods...
January 2018: Tuberculosis
Ramadan Ahmed Mekheimer, Mariam Abdullah Al-Sheikh, Hanadi Yousef Medrasi, Najla Hosain Hassan Alsofyani
A convenient, fast and environmentally benign procedure for the synthesis of a new series of highly functionalized N -alkylated pyridines as privileged medicinal scaffolds was developed via a unique three-component reaction of easily available aromatic as well as heteroaromatic aldehydes, N -alkyl-2-cyanoacetamides and malononitrile in EtOH in the presence of K₂CO₃ as a base promoter under microwave irradiation. The presented tandem process is presumed to proceed via Knoevenagel condensation, Michael addition, intramolecular cyclization, autoxidation and subsequent aromatization...
March 9, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Shadia Hassan, Fadi Hassan, Nur Abbas, Kamal Hassan, Nihal Khatib, Rabia Edgim, Rawia Fadol, Khaled Khazim
BACKGROUND/AIMS: This study is the first of its kind to examine the impact of the Ramadan fasting on hydration status, plasma brain natriuretic peptide (BNP) levels, and kidney function in chronic kidney disease (CKD) patient. METHODS: This prospective cohort study included 2 groups of patients with CKD grades 2-4: thirty-one Muslim patients who fasted the month of Ramadan (fasting group) and 26 Muslim patients who did not fast (control group). One week before the Ramadan fast, in the last week of the month of Ramadan (4 weeks), and 4 weeks after the end of the Ramadan month (8 weeks), hydration status and blood analysis of urea, creatinine and BNP levels were measured...
March 8, 2018: Annals of Nutrition & Metabolism
Ahmed Ramadan El-Rokh, Amr Negm, Maha El-Shamy, Mohamed El-Gindy, Mamdouh Abdel-Mogib
Four previously undescribed sucrose diester of aryldihydronaphthalene-type lignans, named echiumins A-D, were isolated from the butanol fraction of Echium angustifolium Mill, in addition to a known compound, trigonotin A, which is reported for the first time from the title plant. The structures of isolated compounds were elucidated using spectroscopic methods such as HRESIMS and 1D and 2D NMR spectroscopy. The isolated compounds displayed strong to weak antitumor activity against HepG2 and MCF7 cancer cell lines, with echiumins A and D showed the most potent activity...
March 5, 2018: Phytochemistry
Ahmed El-Tawargy, David Stock, Markus Gallei, Wael Ramadan, Mamdoh Shams El-Din, Günter Reiter, Renate Reiter
We have investigated the morphologies of Langmuir layers of charged, polymeric hard-core/interlayer/soft-shell (CIS) nanoparticles spread at the air-water interface. Depending on various mutual interactions, which are correlated to the areal densities of the deposited nanoparticles, we observed ordered patterns of non-dense and closed-packed arrangements of CIS nanoparticle ordering. At low areal densities, we found an almost regular distribution of the charged CIS nanoparticles on the water surface, which resulted from long-range repulsive electrostatic interactions between them...
March 7, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Bahaa E Ali, Ramadan I Al-Shedfat, Mohamed H Fayed, Fars K Alanazi
Development of orodispersible delivery system of high mechanical properties and low disintegration time is a big challenge. The aim of the current work was to assess and optimize the high shear granulation process as a new methodology for development of orodispersible tablets of high quality attributes using design of experiment approach. A two factor, three levels (32), full factorial design was carried out to investigate the main and interaction effects of independent variables, water amount (XI) and granulation time (X2) on the characteristics of granules and final product, tablet...
May 2017: Acta Poloniae Pharmaceutica
Amir M Abdelhamid, Rania Ramadan Abdelaziz, Hatem A Salem
Type I diabetes (TID) is generally assumed to be caused by an immune associated, if not directly immune-mediated, destruction of pancreatic β-cells. In patients with long-term diabetes, the pancreas lacks insulin-producing cells and the residual β-cells are unable to regenerate. Patients with TID are subjected to a lifelong insulin therapy which shows risks of hypoglycemia, suboptimal control and ketosis. In this study, we investigated the potential role of Vildagliptin (Vilda) alone or in combination with Pioglitazone (Pio), as treatment regimens for TID using Streptozotocin (STZ) induced TID model in rats...
March 6, 2018: Canadian Journal of Physiology and Pharmacology
Rahab M Ramadan, Safa M Gasser, Mohamed S El-Mahallawy, Karim Hammad, Ahmed M El Bakly
A mobile ad hoc network is a conventional self-configuring network where the routing optimization problem-subject to various Quality-of-Service (QoS) constraints-represents a major challenge. Unlike previously proposed solutions, in this paper, we propose a memetic algorithm (MA) employing an adaptive mutation parameter, to solve the multicast routing problem with higher search ability and computational efficiency. The proposed algorithm utilizes an updated scheme, based on statistical analysis, to estimate the best values for all MA parameters and enhance MA performance...
2018: PloS One
Irhan Ibrahim Abu Hashim, Noha Fawzy Abo El-Magd, Ahmed Ramadan El-Sheakh, Mohammed Fawzy Hamed, Abd El-Gawad Helmy Abd El-Gawad
The goal of the current study was to explore the potential benefits of Acitretin (Act) nanovesicular gel as a prospective antipsoriatic topical delivery system counteracting the drug challenges in terms of its extremely low aqueous solubility, instability, skin irritation, and serious systemic adverse effects. Act-loaded niosomes were successfully developed, entirely characterized, and optimized. Further evaluation of the optimized formula was conducted regarding its stability and ex vivo cytotoxicity on different cell lines...
2018: International Journal of Nanomedicine
Keren Baranes-Bachar, Adva Levy-Barda, Judith Oehler, Dylan A Reid, Isabel Soria-Bretones, Ty C Voss, Dudley Chung, Yoon Park, Chao Liu, Jong-Bok Yoon, Wei Li, Graham Dellaire, Tom Misteli, Pablo Huertas, Eli Rothenberg, Kristijan Ramadan, Yael Ziv, Yosef Shiloh
Double-strand breaks (DSBs) are critical DNA lesions that robustly activate the elaborate DNA damage response (DDR) network. We identified a critical player in DDR fine-tuning: the E3/E4 ubiquitin ligase UBE4A. UBE4A's recruitment to sites of DNA damage is dependent on primary E3 ligases in the DDR and promotes enhancement and sustainment of K48- and K63-linked ubiquitin chains at these sites. This step is required for timely recruitment of the RAP80 and BRCA1 proteins and proper organization of RAP80- and BRCA1-associated protein complexes at DSB sites...
March 1, 2018: Molecular Cell
Elham Abdelmonem Mohamed, Irhan Ibrahim Abu Hashim, Rehab Mohammad Yusif, Ahmed Abdel Aziz Shaaban, Ahmed Ramadan El-Sheakh, Mohammed Fawzy Hamed, Farid Abd Elreheem Badria
Naringin is one of the most interesting phytopharmaceuticals that has been widely investigated for various biological actions. Yet, its low water solubility, limited permeability, and suboptimal bioavailability limited its use. Therefore, in this study, polymeric micelles of naringin based on pluronic F68 (PF68) were developed, fully characterized, and optimized. The optimized formula was investigated regarding in vitro release, storage stability, and in vitro cytotoxicity vs different cell lines. Also, cytoprotection against ethanol-induced ulcer in rats and antitumor activity against Ehrlich ascites carcinoma in mice were investigated...
2018: International Journal of Nanomedicine
Salwa A Mohammad, Basma K Ramadan, Mona F Schaalan
No abstract text is available yet for this article.
March 2018: Canadian Journal of Physiology and Pharmacology
Abeer Ismail, Rehab El-Awady, Ghada Mohamed, Marwa Hussein, Shimaa Shwaki Ramadan
Objective: To determine the frequency and prognostic significance of vitamin D deficiency in Egyptian women with breast cancer (BC). Methods: This prospective study included 50 women with primary invasive, non-metastatic BC. The serum level of 25-hydroxy vitamin D [25(OH)D was measured by ELISA at diagnosis, before any cancer treatment. Vitamin D deficiency was defined as 25(OH) D<20 ng/mL. Patients were followed up for a median of 30 months (range: 18-48). Results: The median level of 25(OH)D was 29.0 ng/mL (range: 10...
February 26, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
Amany M Ibrahim, Yasser M Ragab, Khaled A Aly, Mohamed A Ramadan
The ESAT6-like Secretion System (ESS) of the human pathogen Staphylococcus aureus secretes heterodimeric virulence effectors such as EsxB and EsxD. To gain insights into the nature of EsxB-EsxD interaction, randomly mutated esxB generated by error-prone PCR was co-transformed together with esxD as adenylate cyclase fusion constructs into cyclase-deficient Escherichia coli, followed by reverse bacterial two-hybrid screening. Three color species were observed: dark blue, light blue, and white (no EsxB-EsxD interaction)...
February 22, 2018: Folia Microbiologica
Menha Swellam, Maha Hashim, Magda Sayed Mahmoud, Amal Ramadan, Naglaa M Hassan
Acute lymphoblastic leukemia (ALL) is a heterogeneous cancer commonly affecting children due to dysregulation of miRNA expression. In the current study, authors investigated the expression profile for miRNA-125b-1 and miRNA-203 among childhood ALL. Blood samples were collected from newly diagnosed childhood ALL and healthy control children. The expression profile for candidate miRNAs was detected using quantitative RT-PCR analysis. Statistical analysis were performed using receiver operating characteristic curve (ROC) to examine the diagnostic efficacy of the two miRNA and their levels among ALL clinicopathological factors and phenotypes...
February 19, 2018: Biochemical Genetics
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