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  1. Article ; Online: Unleashing the immune system to conquer cancer

    Abdulrahman Alsultan

    Journal of Nature and Science of Medicine, Vol 2, Iss 1, Pp 3-

    2019  Volume 4

    Keywords Medicine ; R ; Public aspects of medicine ; RA1-1270
    Language English
    Publishing date 2019-01-01T00:00:00Z
    Publisher Wolters Kluwer Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Isotretinoin-Induced Dyslipidemia: a Single-Center Study in Saudi Arabia.

    Al Dhafiri, Mahdi / Kaliyadan, Feroze / Almukhaimar, Sara / Abdulrahman Alsultan, Fatemah / Al Hayim, Elham / Alnaim, Roaa / Aldossari, Alaa

    Patient preference and adherence

    2024  Volume 18, Page(s) 197–206

    Abstract: Purpose: Acne is a chronic inflammatory skin disease with a high prevalence in Saudi Arabia. Isotretinoin is used to treat severe, resistant nodulocystic acne. Side effects include joint discomfort, headache, mucosal dryness, and nose bleeds. Elevated ... ...

    Abstract Purpose: Acne is a chronic inflammatory skin disease with a high prevalence in Saudi Arabia. Isotretinoin is used to treat severe, resistant nodulocystic acne. Side effects include joint discomfort, headache, mucosal dryness, and nose bleeds. Elevated lipids and liver enzymes have also been recorded. The study goal is to identify the prevalence of increased lipid levels during and after isotretinoin use.
    Patients and methods: This retrospective study was conducted in the dermatology polyclinic at King Faisal University, Al-Ahsa, Saudi Arabia. It included adults of different age groups diagnosed with acne vulgaris and treated with oral isotretinoin between January 2021 and December 2022. Parameters included baseline laboratory tests and follow-up laboratory results of cholesterol and triglycerides.
    Results: Among 88 patients, 48.9% were aged 21-23 years, with females dominating. In total, 47.7% of patients started using isotretinoin at age 20 years or less, with starting doses ranging from 10 to 20 mg. Fifty percent of the patients had five months or more of treatment duration and only 6.8% of the patients had previously used isotretinoin. For the cholesterol and triglycerides, 87.5% of patients had normal pre-treatment with cholesterol and 90.9% with triglycerides, followed by 81.8% and 95.5% in the second reading, respectively. In the last reading, results were 77.3% for cholesterol and 94.3% for triglycerides.
    Conclusion: The study found that most acne patients treated with isotretinoin had normal cholesterol and triglyceride levels at baseline, second, and last readings. The incidence of higher laboratory alterations was low, with 12.5% and 4.5% for cholesterol and triglycerides at baseline, and 18.2% and 3.4% at second, and 22.7% and 5.7% at last readings. Overall, age, gender, age of start of isotretinoin, isotretinoin dose, and previous use of isotretinoin are factors that could affect laboratory readings.
    Language English
    Publishing date 2024-01-20
    Publishing country New Zealand
    Document type Journal Article
    ZDB-ID 2455848-5
    ISSN 1177-889X
    ISSN 1177-889X
    DOI 10.2147/PPA.S445904
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Risedronate and Methotrexate Are High-Affinity Inhibitors of New Delhi Metallo-β-Lactamase-1 (NDM-1)

    Ghazala Muteeb / Abdulrahman Alsultan / Mohd Farhan / Mohammad Aatif

    Molecules, Vol 27, Iss 1283, p

    A Drug Repurposing Approach

    2022  Volume 1283

    Abstract: Bacteria expressing New Delhi metallo-β-lactamase-1 (NDM-1) can hydrolyze β-lactam antibiotics (penicillins, cephalosporins, and carbapenems) and, thus, mediate multidrug resistance. The worldwide dissemination of NDM-1 poses a serious threat to public ... ...

    Abstract Bacteria expressing New Delhi metallo-β-lactamase-1 (NDM-1) can hydrolyze β-lactam antibiotics (penicillins, cephalosporins, and carbapenems) and, thus, mediate multidrug resistance. The worldwide dissemination of NDM-1 poses a serious threat to public health, imposing a huge economic burden in the development of new antibiotics. Thus, there is an urgent need for the identification of novel NDM-1 inhibitors from a pool of already-known drug molecules. Here, we screened a library of FDA-approved drugs to identify novel non-β-lactam ring-containing inhibitors of NDM-1 by applying computational as well as in vitro experimental approaches. Different steps of high-throughput virtual screening, molecular docking, molecular dynamics simulation, and enzyme kinetics were performed to identify risedronate and methotrexate as the inhibitors with the most potential. The molecular mechanics/generalized Born surface area (MM/GBSA) and molecular dynamics (MD) simulations showed that both of the compounds (risedronate and methotrexate) formed a stable complex with NDM-1. Furthermore, analyses of the binding pose revealed that risedronate formed two hydrogen bonds and three electrostatic interactions with the catalytic residues of NDM-1. Similarly, methotrexate formed four hydrogen bonds and one electrostatic interaction with NDM-1’s active site residues. The docking scores of risedronate and methotrexate for NDM-1 were –10.543 kcal mol −1 and −10.189 kcal mol −1 , respectively. Steady-state enzyme kinetics in the presence of risedronate and methotrexate showed a decreased catalytic efficiency (i.e., kcat/Km) of NDM-1 on various antibiotics, owing to poor catalytic proficiency and affinity. The results were further validated by determining the MICs of imipenem and meropenem in the presence of risedronate and methotrexate. The IC 50 values of the identified inhibitors were in the micromolar range. The findings of this study should be helpful in further characterizing the potential of risedronate and methotrexate to treat ...
    Keywords antibiotic resistance ; FDA-approved drugs ; metallo-β-lactamase ; molecular docking and simulation ; structure-based drug design ; Organic chemistry ; QD241-441
    Subject code 540
    Language English
    Publishing date 2022-02-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Dieckol and Its Derivatives as Potential Inhibitors of SARS-CoV-2 Spike Protein (UK Strain

    Mohammad Aatif / Ghazala Muteeb / Abdulrahman Alsultan / Adil Alshoaibi / Bachir Yahia Khelif

    Marine Drugs, Vol 19, Iss 242, p

    VUI 202012/01): A Computational Study

    2021  Volume 242

    Abstract: The high risk of morbidity and mortality associated with SARS-CoV-2 has accelerated the development of many potential vaccines. However, these vaccines are designed against SARS-CoV-2 isolated in Wuhan, China, and thereby may not be effective against ... ...

    Abstract The high risk of morbidity and mortality associated with SARS-CoV-2 has accelerated the development of many potential vaccines. However, these vaccines are designed against SARS-CoV-2 isolated in Wuhan, China, and thereby may not be effective against other SARS-CoV-2 variants such as the United Kingdom variant (VUI-202012/01). The UK SARS-CoV-2 variant possesses D614G mutation in the Spike protein, which impart it a high rate of infection. Therefore, newer strategies are warranted to design novel vaccines and drug candidates specifically designed against the mutated forms of SARS-CoV-2. One such strategy is to target ACE2 (angiotensin-converting enzyme2)–Spike protein RBD (receptor binding domain) interaction. Here, we generated a homology model of Spike protein RBD of SARS-CoV-2 UK strain and screened a marine seaweed database employing different computational approaches. On the basis of high-throughput virtual screening, standard precision, and extra precision molecular docking, we identified BE011 (Dieckol) as the most potent compounds against RBD. However, Dieckol did not display drug-like properties, and thus different derivatives of it were generated in silico and evaluated for binding potential and drug-like properties. One Dieckol derivative (DK07) displayed good binding affinity for RBD along with acceptable physicochemical, pharmacokinetic, drug-likeness, and ADMET properties. Analysis of the RBD–DK07 interaction suggested the formation of hydrogen bonds, electrostatic interactions, and hydrophobic interactions with key residues mediating the ACE2–RBD interaction. Molecular dynamics simulation confirmed the stability of the RBD–DK07 complex. Free energy calculations suggested the primary role of electrostatic and Van der Waals’ interaction in stabilizing the RBD–DK07 complex. Thus, DK07 may be developed as a potential inhibitor of the RBD–ACE2 interaction. However, these results warrant further validation by in vitro and in vivo studies.
    Keywords COVID-19 ; natural compounds ; marine-derived compounds ; molecular docking and simulation ; seaweeds ; spike protein ; Biology (General) ; QH301-705.5
    Subject code 540
    Language English
    Publishing date 2021-04-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: A puzzling case of brain disease following cutaneous lesions in childhood

    Khaldoon Aljerian / Latifa Alanazi / Waleed Al Rajban / Mohammed Mubarak / Mohammed Khalifah / Abdulrahman Alsultan

    Journal of Nature and Science of Medicine, Vol 3, Iss 1, Pp 71-

    A spectrum of disease or induced by therapy?

    2020  Volume 73

    Keywords Medicine ; R ; Public aspects of medicine ; RA1-1270
    Language English
    Publishing date 2020-01-01T00:00:00Z
    Publisher Wolters Kluwer Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Pre‐Leukemia TEL‐AML1 Chromosomal Translocation in Cord Blood of Newborns in Saudi Arabia

    Walid Almashaqbeh / Abdulrahman Sumaily / Nada Albaloushi / Sami Jammah / Abdulrahman Alsultan / Dunia Jawdat

    Stem Cells Translational Medicine, Vol 8, Iss S1, Pp S32-S

    2019  Volume 32

    Keywords Medicine (General) ; R5-920 ; Cytology ; QH573-671
    Language English
    Publishing date 2019-09-01T00:00:00Z
    Publisher Oxford University Press
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Anticancer effect of zinc oxide nanoparticles prepared by varying entry time of ion carriers against A431 skin cancer cells in vitro

    Albandri Yousef Aljohar / Ghazala Muteeb / Qamar Zia / Sahabjada Siddiqui / Mohammad Aatif / Mohd Farhan / Mohd. Farhan Khan / Abdulrahman Alsultan / Azfar Jamal / Adil Alshoaibi / Ejaz Ahmad / Mir Waqas Alam / Md Arshad / Mohd Imran Ahamed

    Frontiers in Chemistry, Vol

    2022  Volume 10

    Abstract: Although, zinc oxide nanoparticles (ZRTs) as an anti-cancer agent have been the subject of numerous studies, none of the reports has investigated the impact of the reaction entry time of ion-carriers on the preparation of ZRTs. Therefore, we synthesized ... ...

    Abstract Although, zinc oxide nanoparticles (ZRTs) as an anti-cancer agent have been the subject of numerous studies, none of the reports has investigated the impact of the reaction entry time of ion-carriers on the preparation of ZRTs. Therefore, we synthesized variants of ZRTs by extending the entry time of NaOH (that acts as a carrier of hydroxyl ions) in the reaction mixture. The anti-proliferative action, morphological changes, reactive oxygen species (ROS) production, and nuclear apoptosis of ZRTs on human A431 skin carcinoma cells were observed. The samples revealed crystallinity and purity by X-ray diffraction (XRD). Scanning electron microscopy (SEM) images of ZRT-1 (5 min ion carrier entry) and ZRT-2 (10 min ion carrier entry) revealed microtubule like morphology. On prolonging the entry time for ion carrier (NaOH) introduction in the reaction mixture, a relative ascent in the aspect ratio was seen. The typical ZnO band with a slight shift in the absorption maxima was evident with UV-visible spectroscopy. Both ZRT-1 and ZRT-2 exhibited non-toxic behavior as evident by RBC lysis assay. Additionally, ZRT-2 showed better anti-cancer potential against A431 cells as seen by MTT assay, ROS generation and chromatin condensation analyses. At 25 μM of ZRT-2, 5.56% cells were viable in MTT test, ROS production was enhanced to 166.71%, while 33.0% of apoptotic cells were observed. The IC50 for ZRT-2 was slightly lower (6 μM) than that for ZRT-1 (8 μM) against A431 cells. In conclusion, this paper presents a modest, economical procedure to generate ZRT nano-structures exhibiting strong cytotoxicity against the A431 cell line, indicating that ZRTs may have application in combating cancer.
    Keywords zinc oxide nanoparticles ; sol-gel synthesis ; malignant cell lines ; MTT assay ; reactive oxygen species ; Chemistry ; QD1-999
    Subject code 500
    Language English
    Publishing date 2022-12-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: UGT1A1 promoter polymorphism associated with serum bilirubin level in Saudi patients with sickle cell disease

    Zainab Hamad / Abdullah Aljedai / Rabih Halwani / Abdulrahman AlSultan

    Annals of Saudi Medicine, Vol 33, Iss 4, Pp 372-

    2013  Volume 376

    Abstract: BACKGROUND AND OBJECTIVES: Polymorphism in (TA)n of the UGT1A1 promoter influences bilirubin level and risk of gallstones in patients with sickle cell disease (SCD) of African descent. Modifiers of bilirubin level and gallstones in Saudi patients with ... ...

    Abstract BACKGROUND AND OBJECTIVES: Polymorphism in (TA)n of the UGT1A1 promoter influences bilirubin level and risk of gallstones in patients with sickle cell disease (SCD) of African descent. Modifiers of bilirubin level and gallstones in Saudi patients with SCD are not known. DESIGN AND SETTINGS: Patients with SCD presenting to participating institutions between July 2009 and July 2012 were enrolled in our study. METHODS: A total of 223 SCD patients were enrolled. Laboratory workup at steady state included complete blood count, reticulocytes, serum bilirubin, lactate dehydrogenase (LDH), G6PD level, and hemoglobin (Hb) electrophoresis. The (TA)n UGT1A1 promoter polymorphism and presence of α-thalassemia were also determined. RESULTS: TA6/6 in the UGT1A1 promoter was identified in 189 patients (84.7%), TA7/7 in 26 (11.7%), TA5/5 in 6 (2.7%), and TA5/6 in 2 (0.9%). Increased (TA)n of the UGT1A1 promoter (P<.0001), male gender (P=.02), higher LDH (P=.001), and lower Hb level (P=.009) were associated with higher bilirubin level, while the co-inheritance of α-thalassemia (P=.003) was linked with lower bilirubin level. UGT1A1 (TA)n (P<.0001) and Hb level (P=.005) remained significant on multivariate analysis. Gallstones were more frequent in patients with TA7/7 (72%) compared to patients with TA6/6 (57%) and TA5/5 or 5/6 (37%); however, this difference was not statistically significance (P=.18). Older age (P=.0001) and absence of α-thalassemia (P=.03) were associated with higher risk of gallstones. CONCLUSION: (TA)n in the UGT1A1 promoter and intensity of hemolysis modify steady-state serum bilirubin level in SCD. Co-inheritance of α-thalassemia reduces the risk of gallstones in Saudi patients with SCD.
    Keywords Medicine ; R
    Subject code 616 ; 610
    Language English
    Publishing date 2013-07-01T00:00:00Z
    Publisher King Faisal Specialist Hospital and Research Centre
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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