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Binobaid L, As Sobeai HM, Alhazzani K, AlAbdi L, Alwazae MM, Alotaibi M, Parrington J, Alhoshani A. Whole-exome sequencing identifies cancer-associated variants of the endo-lysosomal ion transport channels in the Saudi population. Saudi Pharm J 2024; 32:101961. [PMID: 38313820 PMCID: PMC10832475 DOI: 10.1016/j.jsps.2024.101961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024] Open
Abstract
Background Although national efforts are underway to document the genomic variability of the Saudi population relative to other populations, such variability remains largely unexplored. Genetic variability is known to impact the fate of cells and increase or decrease the risk of a variety of complex diseases including cancer forms. Therefore, the identification of variants associated with cancer susceptibility in Saudi population may protect individuals from cancer or aid in patient-tailored therapies. The endo-lysosomal ion transport genes responsible for cationic ion homeostasis within the cell. We screened 703 single-nucleotide polymorphisms (SNPs) of the endo-lysosomal ion transporter genes in the Saudi population and identified cancer-associated variants that have been reported in other populations. Methods Utilizing previously derived local data of Whole-Exome Sequencing (WES), we examined SNPs of TPCN1, TPCN2, P2RX4, TRPM7, TRPV4, TRPV4, and TRPV6 genes. The SNPs were identified for those genes by our in-house database. We predicted the pathogenicity of these variants using in silico tools CADD, Polyphen-2, SIFT, PrimateAI, and FATHMM-XF. Then, we validated our findings by exploring the genetics database (VarSome, dbSNP NCB, OMIM, ClinVar, Ensembl, and GWAS Catalog) to further link cancer risk. Results The WES database yielded 703 SNPs found in TPCN2, P2RX4, TRPM7, TRPV4, and TRPV6 genes in 1,144 subjects. The number of variants that were found to be common in our population was 150 SNPs. We identified 13 coding-region non-synonymous variants of the endo-lysosomal genes that were most common with a minor allele frequency (MAF) of ≥ 1 %. Twelve of these variants are rs2376558, rs3750965, rs61746574, rs35264875, rs3829241, rs72928978, rs25644, rs8042919, rs17881456, rs4987682, rs4987667, and rs4987657 that were classified as cancer-associated genes. Conclusion Our study highlighted cancer-associated SNPs in the endo-lysosomal genes among Saudi individuals. The allelic frequencies on polymorphic variants confer susceptibility to complex diseases that are comparable to other populations. There is currently insufficient clinical data supporting the link between these SNPs and cancer risk in the Saudi population. Our data argues for initiating future cohort studies in which individuals with the identified SNPs are monitored and assessed for their likelihood of developing malignancies and therapy outcomes.
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Affiliation(s)
- Lama Binobaid
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11454, Saudi Arabia
| | - Homood M. As Sobeai
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11454, Saudi Arabia
| | - Khalid Alhazzani
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11454, Saudi Arabia
| | - Lama AlAbdi
- Department of Zoology, College of Science, King Saud University, P.O. Box 2457, Riyadh 11454, Saudi Arabia
| | - Meshari M. Alwazae
- Computational Sciences Department, Center of Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Moureq Alotaibi
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11454, Saudi Arabia
| | - John Parrington
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, United Kingdom
| | - Ali Alhoshani
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11454, Saudi Arabia
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Hanbashi A, Alotaibi M, Sobeai HMA, Binobaid L, Alhazzani K, Jin X, Kamli F, Alhoshani A, Parrington J. Loss of two-pore channel 2 function in melanoma-derived tumours reduces tumour growth in vivo but greatly increases tumour-related toxicity in the organism. Cancer Cell Int 2023; 23:325. [PMID: 38104117 PMCID: PMC10725603 DOI: 10.1186/s12935-023-03148-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 11/14/2023] [Indexed: 12/19/2023] Open
Abstract
BACKGROUND Melanoma, a severe form of skin cancer, poses significant health risks due to its aggressive nature and potential for metastasis. The role of two-pore channel 2 (TPC2) in the development and progression of melanoma remains poorly understood. This study aims to investigate the impact of TPC2 knockout (KO) on melanoma-derived tumors, focusing on tumour growth and related toxicity in the organism. METHODS The study utilized CHL-1 and B16 melanoma cell lines with TPC2 KO to assess the changes in proliferation dynamics. Methods included real-time monitoring of cell proliferation using the xCELLigence system, in vivo tumour growth assays in mice, histopathological analyses, inflammation marker assessment, and quantitative PCR (qPCR) for gene expression analysis RESULTS: TPC2 KO was found to significantly alter the proliferation dynamics of CHL-1 and B16 melanoma cells. The in vivo studies demonstrated reduced tumor growth in TPC2 KO cell-derived tumors. However, a notable increase in tumor-related toxicity in affected organs, such as the liver and spleen, was observed, indicating a complex role of TPC2 in melanoma pathology. CONCLUSIONS The loss of TPC2 function in melanoma cells leads to reduced tumour growth but exacerbates tumour-related toxicity in the organism. These findings highlight the dual role of TPC2 in melanoma progression and its potential as a therapeutic target. Further research is needed to fully understand the mechanisms underlying these effects and to explore TPC2 as a treatment target in melanoma.
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Affiliation(s)
- Ali Hanbashi
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Moureq Alotaibi
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Kingdom of Saudi Arabia, P.O. Box 2457, Riyadh, 11454, Saudi Arabia
| | - Homood M As Sobeai
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Kingdom of Saudi Arabia, P.O. Box 2457, Riyadh, 11454, Saudi Arabia
| | - Lama Binobaid
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Kingdom of Saudi Arabia, P.O. Box 2457, Riyadh, 11454, Saudi Arabia
| | - Khalid Alhazzani
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Kingdom of Saudi Arabia, P.O. Box 2457, Riyadh, 11454, Saudi Arabia
| | - Xuhui Jin
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Faroq Kamli
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Ali Alhoshani
- Dept. of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Kingdom of Saudi Arabia, P.O. Box 2457, Riyadh, 11454, Saudi Arabia
| | - John Parrington
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK.
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Aljasham AT, Damra EM, Alkahtani NS, Alouffi A, Al Salem WS, Alshabanah AO, Alotaibi M, Tanaka T, Ali A, Almutairi MM. Isolation, identification and antimicrobial susceptibility of the bacteria isolated from Hyalomma dromedarii infesting camels in Al-Jouf province, Saudi Arabia. Front Vet Sci 2023; 10:1227908. [PMID: 38155762 PMCID: PMC10752931 DOI: 10.3389/fvets.2023.1227908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 11/20/2023] [Indexed: 12/30/2023] Open
Abstract
Ticks are important ectoparasites that transmit various pathogens causing morbidity and mortality in humans and animals. Saudi Arabia faces several challenges that can contribute to the emergence and spread of antimicrobial resistance (AMR) bacteria. These challenges require collaborative efforts to successfully achieve significant control of AMR in the country. The present study aims to isolate bacteria from camels' tick Hyalomma dromedarii in Al-Jouf province to identify and determine these isolates' antimicrobial susceptibilities. Forty-nine ticks were collected from dromedary camels and morphologically classified as H. dromedarii. Ticks were then homogenized and plated individually, which resulted in the isolation of 55 bacteria. The results showed that the bacterial isolates belong to 20 different species. About 71% (n = 39) of the total isolates were identified as Gram-positive bacteria comprised of 11 different species, while 29% (n = 16) of the total isolates were Gram-negative bacteria comprised of 9 different species. The most prevalent isolate within the total samples was Staphylococcus lentus (22.45%, 11/49), followed by Staphylococcus pseudintermedius (18.37%, 9/49) and Sphingomonas paucimobilis (16.33% 8/49). The antimicrobial susceptibility profile of Gram-positive bacteria showed that 100% (n = 31) were resistant to benzylpenicillin; 90.3% (n = 28) were resistant to oxacillin; 58.1% (n = 18) were resistant to clindamycin; 48.4% (n = 15) were resistant to vancomycin. In addition, 32.3% (n = 10) were resistant to trimethoprim/sulfamethoxazole and rifampicin; 25.8% (n = 8) were resistant to erythromycin; 16.1% (n = 5) were resistant to teicoplanin; 6.5% (n = 2) were resistant to tetracycline. All Gram-positive bacteria were 100% susceptible to linezolid, gentamicin, tobramycin, levofloxacin, moxifloxacin, tigecycline, and nitrofurantoin. In antimicrobial susceptibility tests for the Gram-negative bacteria, 57.14% (n = 8) of the identified bacteria were resistant to ampicillin, whereas 50% (n = 7) were resistant to cefoxitin and ceftazidime. About 28.57% (n = 4) of the Gram-negative bacteria were resistant to ceftriaxone, trimethoprim/sulfamethoxazole. In addition, 21.43% (n = 3) were resistant to amoxicillin/clavulanic acid and cephalothin; 14.29% (n = 2) were resistant to cefepime and nitrofurantoin; 7.14% (n = 1) were resistant to piperacillin/tazobactam and tigecycline. However, all Gram-negative bacteria were susceptible to other examined antimicrobials. This is the first study that investigates the role of the hard tick as a potential reservoir for AMR pathogens within our region.
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Affiliation(s)
- Alanoud T. Aljasham
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Eman M. Damra
- Department of Agriculture, Ministry of Environment, Water, and Agriculture, Riyadh, Saudi Arabia
| | - Nora S. Alkahtani
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Abdulaziz Alouffi
- King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Waleed S. Al Salem
- Department of Agriculture, Ministry of Environment, Water, and Agriculture, Riyadh, Saudi Arabia
| | - Aljoharah O. Alshabanah
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Moureq Alotaibi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Tetsuya Tanaka
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan
| | - Abid Ali
- Department of Zoology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Mashal M. Almutairi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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Zarewa SA, Binobaid L, Sulaiman AAA, Sobeai HMA, Alotaibi M, Alhoshani A, Isab AA. Synthesis, Characterization, and Anticancer Activity of Phosphanegold(i) Complexes of 3-Thiosemicarbano-butan-2-one Oxime. Biomedicines 2023; 11:2512. [PMID: 37760953 PMCID: PMC10525815 DOI: 10.3390/biomedicines11092512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/23/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Four novel phosphanegold(I) complexes of the type [Au(PR3)(DMT)].PF6 (1-4) were synthesized from 3-Thiosemicarbano-butan-2-one oxime ligand (TBO) and precursors [Au(PR3)Cl], (where R = methyl (1), ethyl (2), tert-butyl (3), and phenyl (4)). The resulting complexes were characterized by elemental analyses and melting point as well as various spectroscopic techniques, including FTIR and (1H, 13C, and 31P) NMR spectroscopy. The spectroscopic data confirmed the coordination of TBO ligands to phosphanegold(I) moiety. The solution chemistry of complexes 1-4 indicated their stability in both dimethyl sulfoxide (DMSO) and a mixture of EtOH:H2O (1:1). In vitro cytotoxicity of the complexes was evaluated relative to cisplatin using an MTT assay against three different cancer cell lines: HCT116 (human colon cancer), MDA-MB-231 (human breast cancer), and B16 (murine skin cancer). Complexes 2, 3, and 4 exhibited significant cytotoxic effects against all tested cancer cell lines and showed significantly higher activity than cisplatin. To elucidate the mechanism underlying the cytotoxic effects of the phosphanegold(I) TBO complexes, various assays were employed, including mitochondrial membrane potential, ROS production, and gene expression analyses. The data obtained suggest that complex 2 exerts potent anticancer activity against breast cancer cells (MDA-MB-231) through the induction of oxidative stress, mitochondrial dysfunction, and apoptosis. Gene expression analyses showed an increase in the activity of the proapoptotic gene caspase-3 and a reduction in the activity of the antiapoptotic gene BCL-xL, which supported the findings that apoptosis had occurred.
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Affiliation(s)
- Sani A. Zarewa
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
| | - Lama Binobaid
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (L.B.); (H.M.A.S.); (M.A.); (A.A.)
| | - Adam A. A. Sulaiman
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
- Core Research Facilities (CRF), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Homood M. As Sobeai
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (L.B.); (H.M.A.S.); (M.A.); (A.A.)
| | - Moureq Alotaibi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (L.B.); (H.M.A.S.); (M.A.); (A.A.)
| | - Ali Alhoshani
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (L.B.); (H.M.A.S.); (M.A.); (A.A.)
| | - Anvarhusein A. Isab
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
- Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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Alotaibi M, Al-Aqil F, Alqahtani F, Alanazi M, Nadeem A, Ahmad SF, Lapresa R, Alharbi M, Alshammari A, Alotaibi M, Saleh T, Alrowis R. Alleviation of cisplatin-induced neuropathic pain, neuronal apoptosis, and systemic inflammation in mice by rapamycin. Front Aging Neurosci 2022; 14:891593. [PMID: 36248001 PMCID: PMC9554141 DOI: 10.3389/fnagi.2022.891593] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 08/15/2022] [Indexed: 11/30/2022] Open
Abstract
Platinum-based chemotherapeutic treatment of cancer patients is associated with debilitating adverse effects. Several adverse effects have been well investigated, and can be managed satisfactorily, but chemotherapy-induced peripheral neuropathy (CIPN) remains poorly treated. Our primary aim in this study was to investigate the neuroprotective effect of the immunomodulatory drug rapamycin in the mitigation of cisplatin-induced neurotoxicity. Pain assays were performed in vivo to determine whether rapamycin would prevent or significantly decrease cisplatin-induced neurotoxicity in adult male Balb/c mice. Neuropathic pain induced by both chronic and acute exposure to cisplatin was measured by hot plate assay, cold plate assay, tail-flick test, and plantar test. Rapamycin co-treatment resulted in significant reduction in cisplatin-induced nociceptive-like symptoms. To understand the underlying mechanisms behind rapamycin-mediated neuroprotection, we investigated its effect on certain inflammatory mediators implicated in the propagation of chemotherapy-induced neurotoxicity. Interestingly, cisplatin was found to significantly increase peripheral IL-17A expression and CD8- T cells, which were remarkably reversed by the pre-treatment of mice with rapamycin. In addition, rapamycin reduced the cisplatin-induced neuronal apoptosis marked by decreased neuronal caspase-3 activity. The rapamycin neuroprotective effect was also associated with reversal of the changes in protein expression of p21Cip1, p53, and PUMA. Collectively, rapamycin alleviated some features of cisplatin-induced neurotoxicity in mice and can be further investigated for the treatment of cisplatin-induced peripheral neuropathy.
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Affiliation(s)
- Moureq Alotaibi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- *Correspondence: Moureq Alotaibi,
| | - Faten Al-Aqil
- Deanship of Scientific Research, King Saud University, Riyadh, Saudi Arabia
| | - Faleh Alqahtani
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Miteb Alanazi
- Pharmacy Services, King Saud University Medical City, Riyadh, Saudi Arabia
| | - Ahmed Nadeem
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Sheikh F. Ahmad
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Rebeca Lapresa
- Institute of Functional Biology and Genomics, Consejo Superior de Investigaciones Científicas (CSIC), University of Salamanca, Salamanca, Spain
- Institute of Biomedical Research of Salamanca, University Hospital of Salamanca, Consejo Superior de Investigaciones Científicas (CSIC), University of Salamanca, Salamanca, Spain
| | - Metab Alharbi
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrahman Alshammari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Muteb Alotaibi
- Department of Neurology, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Tareq Saleh
- Department of Basic Medical Sciences, Faculty of Medicine, The Hashemite University, Zarqa, Jordan
| | - Raed Alrowis
- Department of Periodotics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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Alotaibi M, Coras R, Pappas DA, Kremer JM, Thiele G, Mikuls T, Jain M, Guma M. POS0506 DIFFERENT BIOACTIVE LIPID PROFILES PREDICT RESPONSE TO TNF OR IL6 INHIBITORS IN RHEUMATOID ARTHRITIS: RESULT OF THE CorEvitas CERTAIN COMPARATIVE EFFECTIVENESS STUDY. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundCirculating bioactive lipids can provide information about the pathogenesis of specific diseases and potentially help predict therapeutic response. Choosing the right biological therapy earlier in the course of rheumatoid arthritis (RA) could help reach the goal of remission.ObjectivesWe hypothesized that circulating bioactive lipids at baseline would identify specific metabolic profiles that predict patient response to therapy and define elements of metabolic pathobiology in arthritis.MethodsBioactive lipids were measured in plasma from two cohorts of RA patients from the CorEvitas (formerly known as Corrona) CERTAIN registry (1) at baseline prior to treatment with TNF inhibitors (all biologic naïve, N=102) or anti-IL6 (all previously exposed to biologics, N=114). Response to treatment was categorized by minimal clinically important difference (MCID) in Clinical Disease Activity Index (CDAI) (2) at 6 months after treatment initiation. Patients had to have a 6 month follow up visit and plasma available at both the baseline and the f/u time points. Liquid chromatography (LC) system coupled with high resolution QExactive orbitrap mass spectrometer (LC/MS) was used for bioactive lipids profiling. Around 300 spectral features were identified as potential oxylipins by searching against an in-house MS/MS library. Logistic regression analyses adjusted for gender, age and BMI was perfomed using R software.Results102 patients (average age 54, standard deviation [SD] 12.6, 82% female [83], average BMI 29.7, SD 6.7, average CDAI 27.1, SD 13.7) starting anti-TNF therapy and 114 patients (average age 57, SD 13, 90% female [102], average BMI 30.5, SD 7.4, average CDAI 28.7, SD 13.8) starting tocilizumab were analyzed. Twenty-five bioactive metabolites discriminated between RA patients classified as anti-TNF responders (R, n = 74) and non-responders (NR, n = 28). Among these, the anti-inflammatory oxylipin maresin 2 was higher in R while the pro-inflammatory oxylipins 15d PGJ2 and 5,6-diHETE were higher in NR. Twenty different metabolites discriminated anti-IL6 R (n=73) and NR (n=41) as shown in Figure 1. The anti-inflammatory oxylipin 14-15EET was higher in R while the pro-inflammatory oxylipins 16-HETE and 5S-HpETE were higher in NR.Figure 1.Volcano plots visualizing baseline metabolites associated with responders vs. non responders in a) anti-TNF and b) anti IL-6 therapy groups. Results are derived from multivariate logistic regression analysis of baseline metabolites and response to treatment categorized by MCID. Data plotted as the metabolite against its statistical significance, respectively reported as odds ratio (OR) and -log10(pvalue).ConclusionCirculating bioactive lipid analysis using LC/MS provided a rapid analysis of a wide range of metabolites and can be used to describe metabolic signatures that predict response to therapies. These results lay the groundwork for more deliberate investigations novel metabolic-based interventions to predict response to therapy and reduce arthritis morbidity.References[1]Pappas DA, Kremer JM, Reed G, Greenberg JD, Curtis JR. Design characteristics of the CORRONA CERTAIN study: a comparative effectiveness study of biologic agents for rheumatoid arthritis patients. BMC Musculoskeletal Disord 2014; 15: 113[2]Curtis JR, Yang S, Chen L, Pope JE, Keystone EC, Haraoui B, Boire G, Thorne JC, Tin D, Hitchon CA, Bingham CO 3rd, Bykerk VP. Determining the Minimally Important Difference in the Clinical Disease Activity Index for Improvement and Worsening in Early Rheumatoid Arthritis Patients. Arthritis Care Res (Hoboken). 2015 Oct;67(10):1345-53. doi: 10.1002/acr.22606. PMID: 25988705; PMCID: PMC4580563.Disclosure of InterestsMona Alotaibi: None declared, Roxana Coras: None declared, Dimitrios A Pappas Speakers bureau: Sanofi, Novartis, Paid instructor for: Novartis, Consultant of: Roche, Sanofi, Joel M Kremer Speakers bureau: Pfizer, Consultant of: BMS, Geoffrey Thiele: None declared, Ted Mikuls Consultant of: Pfizer, Gilead, BMS, Sanofi, Mohit Jain Employee of: Sapient Bio, Monica Guma Grant/research support from: Pfizer, Novartis.
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Alhoshani A, Alotaibi M, As Sobeai HM, Alharbi N, Alhazzani K, Al-Dhfyan A, Alanazi FE, Korashy HM. In vivo and in vitro studies evaluating the chemopreventive effect of metformin on the aryl hydrocarbon receptor-mediated breast carcinogenesis. Saudi J Biol Sci 2021; 28:7396-7403. [PMID: 34867043 PMCID: PMC8626299 DOI: 10.1016/j.sjbs.2021.08.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/12/2021] [Accepted: 08/15/2021] [Indexed: 01/02/2023] Open
Abstract
Metformin (MET) is a clinically used anti-hyperglycemic agent that shows activities against chemically-induced animal models of cancer. A study from our laboratory showed that MET protectes against 7, 12-dimethylbenz[a]anthracene (DMBA)-induced carcinogenesis in vitro human non-cancerous epithelial breast cells (MCF10A) via activation of the aryl hydrocarbon receptor (AhR). However, it is unclear whether MET can prevent the initiation of breast carcinogenesis in an in vivo rat model of AhR-induced breast carcinogenesis. Therefore, the main aims of this study are to examine the effect of MET on protecting against rat breast carcinogenesis induced by DMBA and to explore whether this effect is medicated through the AhR pathway. In this study, treatment of female rats with DMBA initiated breast carcinogenesis though inhibiting apoptosis and tumor suppressor genes while inducing oxidative DNA damage and cell cycle proliferative markers. This effect was associated with activation of AhR and its downstream target genes; cytochrome P4501A1 (CYP1A1) and CYP1B1. Importantly, MET treatment protected against DMBA-induced breast carcinogenesis by restoring DMBA effects on apoptosis, tumor suppressor genes, DNA damage, and cell proliferation. Mechanistically using in vitro human breast cancer MCF-7 cells, MET inhibited breast cancer stem cells spheroids formation and development by DMBA, which was accompanied by a proportional inhibition in CYP1A1 gene expression. In conclusion, the study reports evidence that MET is an effective chemopreventive therapy for breast cancer by inhibiting the activation of CYP1A1/CYP1B1 pathway in vivo rat model.
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Affiliation(s)
- Ali Alhoshani
- Department of Pharmacology & Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Moureq Alotaibi
- Department of Pharmacology & Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Homood M As Sobeai
- Department of Pharmacology & Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Naif Alharbi
- Department of Pharmacology & Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Khalid Alhazzani
- Department of Pharmacology & Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Abdullah Al-Dhfyan
- Stem Cell & Tissue Re-Engineering, King Faisal Specialist Hospital and Research Center, Riyadh 11211, Saudi Arabia
| | - Fawaz E Alanazi
- Department of Pharmacology & Toxicology, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Hesham M Korashy
- Department of Pharmaceutical Sciences, College of Pharmacy, QU Health, Qatar University, Doha 2713, Qatar
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Alanazi FE, As Sobeai HM, Alhazzani K, Al-Dhfyan A, Alshammari MA, Alotaibi M, Al-hosaini K, Korashy HM, Alhoshani A. Metformin attenuates V-domain Ig suppressor of T-cell activation through the aryl hydrocarbon receptor pathway in Melanoma: In Vivo and In Vitro Studies. Saudi Pharm J 2021; 30:138-149. [PMID: 35528855 PMCID: PMC9072704 DOI: 10.1016/j.jsps.2021.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/27/2021] [Indexed: 11/06/2022] Open
Abstract
Melanoma is an aggressive skin cancer with a high rate of metastasis to other organs. Recent studies specified the overexpression of V-domain Ig suppressor of T-cell activation (VISTA) and Aryl Hydrocarbon Receptor (AHR) in melanoma. Metformin shows anti-tumor activities in several cancer types. However, the mechanism is unclear. This study aims to investigate the inhibitory effect of metformin on VISTA via AHR in melanoma cells (CHL-1, B16) and animal models. VISTA and AHR levels were assessed by qPCR, Western blot, immunofluorescence microscope, flow cytometry, and immunohistochemistry. Here, metformin significantly decreased VISTA and AHR levels in vitro and in vivo. Furthermore, metformin inhibited all AHR-regulated genes. VISTA levels were dramatically inhibited by AHR modulations using shRNA and αNF, confirming the central role of AHR in VISTA. Finally, melanoma cells were xenografted in C57BL/6 and nude mice. Metformin significantly reduced the tumor volume and growth rate. Likewise, VISTA and AHR-regulated protein levels were suppressed in both models. These findings demonstrate for the first time that VISTA is suppressed by metformin and identified a new regulatory mechanism through AHR. The data suggest that metformin could be a new potential therapeutic strategy to treat melanoma patients combined with targeted immune checkpoint inhibitors.
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9
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Omair MA, Alhawassi T, Alwaihibi M, Aldrees G, Mosli M, Asser WM, Alharaibi MA, Alotaibi AT, Bintaleb DA, Alharbi NK, Alotaibi AZ, Alshammari WA, Alanazi N, Asiri AM, Almadany R, Al Rayes H, Al-Thunian T, Alotaibi M, Al Jazaeri A. Improving the understanding of originator and biosimilar biologics among healthcare providers in Saudi Arabia. Saudi Pharm J 2021; 28:1827-1829. [PMID: 33424270 PMCID: PMC7783213 DOI: 10.1016/j.jsps.2020.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 11/18/2020] [Indexed: 11/26/2022] Open
Abstract
The loss of patentability of many originator biologics has led to the rapid introduction of biosimilar agents. The anticipated economic benefit of introducing such agent has been accompanied by vagueness surrounding their biotechnology, approval requirements, positioning in treatment paradigms and potential for adverse events. The Second Symposium on Biologics and Biosimilars “Beyond Clinical Practice” was held on 24th-26th January 2020 aiming at improving the understanding of these new agents in a diverse interactive conference and to guide stakeholders how to introduce biosimilars into clinical practice. The symposium consisted of 4 tracks and 3 workshops. A total of 217 participants attended the meeting. The majority were pharmacists (78.8%) followed by physicians (18.9%) and other healthcare providers (2.3%). The workshops covered the following topics: basics of pharmacoeconomics, pharmacovigilance and patients’ perspective toward biosimilar biologics. While, the 4 main tracks included: Introduction to biosimilars, challenges in clinical practice, regulatory and pharmacoeconomic aspects and Challenges in biosimilar pharmacovigilance.
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Affiliation(s)
- Mohammed A. Omair
- Rheumatology Unit, Department of Medicine, King Saud University, Riyadh, Saudi Arabia
- Corresponding author at: Rheumatology Division, Department of Medicine (38), College of Medicine King, Saud University, PO Box 2925, Riyadh 11461, Saudi Arabia.
| | - Tariq Alhawassi
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Munira Alwaihibi
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ghada Aldrees
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mahmoud Mosli
- Gastroenterology Unit, Department of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Wesam M. Asser
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Maryam A. Alharaibi
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Atheer T. Alotaibi
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Doaa A. Bintaleb
- Pharmacy Services, King Saud Medical City, Ministry of Health, Riyadh, Saudi Arabia
| | - Najah K. Alharbi
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed Z. Alotaibi
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Wajed A. Alshammari
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Nouf Alanazi
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ali M. Asiri
- Medication Safety Research Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | | | - Hanan Al Rayes
- Rheumatology Unit, Medicine Department, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | | | - Moureq Alotaibi
- College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrazaq Al Jazaeri
- Department of Pharmaceutical Care, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
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10
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Al-Quraishy S, Abdel-Gaber R, Dkhil MA, Abdel-Baki AS, Alotaibi M, Alhafidh W, Al-Houshany N. Detection of Raillietina saudiae from the domestic pigeon in Saudi Arabia through 18S and 28S rDNA genes. Lett Appl Microbiol 2020; 72:90-97. [PMID: 32989757 DOI: 10.1111/lam.13400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 11/30/2022]
Abstract
Raillietina saudiae is a well-studied avian gastrointestinal parasite belonging to the family Davaineidae and is the most prevalent cyclophyllid tapeworm infecting pigeon in Saudi Arabia. The present study considered as a complementary analysis of Al-Quraishy et al. (2019; Parasitol Int 71, 59-72) with molecular studies for two ribosomal DNA genes employed for precise recognition of this Raillietina species. The annotated partial 18S and 28S rDNA gene regions were found to be 888 and 900 bp long that utilized further to elucidate their genetic relationships at species level using maximum likelihood method. The query sequence of R. saudiae is well aligned and placed within the Davaineidae family, with the same clade of all species of Raillietina that well separated from other cyclophyllidean cestodes especially taeniid and hymenolepid species. Sequence data recorded the monophyly of Raillietina species. The current phylogeny supports the usage of the partial 18S and 28S rDNA genes as reliable markers for phylogenetic reconstructions.
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Affiliation(s)
- S Al-Quraishy
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - R Abdel-Gaber
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.,Zoology Department, Faculty of Science, Cairo University, Cairo, Egypt
| | - M A Dkhil
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.,Department of Zoology and Entomology, Faculty of Science, Helwan University, Cairo, Egypt
| | - A S Abdel-Baki
- Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - M Alotaibi
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - W Alhafidh
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - N Al-Houshany
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
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11
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Alotaibi M, Geisler V, Olze H, Knopke S. Masson tumor as a neck mass. Eur Ann Otorhinolaryngol Head Neck Dis 2020; 137:217-218. [DOI: 10.1016/j.anorl.2018.11.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 10/16/2018] [Accepted: 11/06/2018] [Indexed: 12/28/2022]
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12
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Alshehri M, Alzahrani H, Alotaibi M, Alhowimel A, Khoja O. Physiotherapistś pain attitudes and beliefs, and their influence on the treatment selection for patients with chronic non-specific low back pain. Physiotherapy 2020. [DOI: 10.1016/j.physio.2020.03.265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Alahmari W, Alhowimel A, Alotaibi M, Kontou E, Logan P, Coulson N. Exploring the views of stroke survivors around post stroke fatigue in Saudi Arabia: a qualitative interview study. Physiotherapy 2020. [DOI: 10.1016/j.physio.2020.03.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Alhumaidy A, Alahmadi R, Eisa S, Alotaibi M, Filfilan S, Alzayer M, Okdah L, Doumith M, Taha O, Albishri B, Mulana A, Al-Shelgani A, Alghoribi M, Alzeyadi Z. Molecular Characterization of Carbapenemase Producing Acinetobacter Baumannii and Pseudomonas aeruginosa from Tertiary Care Hospitals in Mecca - Saudi Arabia. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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15
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Xu J, Patel NH, Saleh T, Cudjoe EK, Alotaibi M, Wu Y, Lima S, Hawkridge AM, Gewirtz DA. Differential Radiation Sensitivity in p53 Wild-Type and p53-Deficient Tumor Cells Associated with Senescence but not Apoptosis or (Nonprotective) Autophagy. Radiat Res 2018; 190:538-557. [PMID: 30132722 DOI: 10.1667/rr15099.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Studies of radiation interaction with tumor cells often focus on apoptosis as an end point; however, clinically relevant doses of radiation also promote autophagy and senescence. Moreover, functional p53 has frequently been implicated in contributing to radiation sensitivity through the facilitation of apoptosis. To address the involvement of apoptosis, autophagy, senescence and p53 status in the response to radiation, the current studies utilized isogenic H460 non-small cell lung cancer cells that were either p53-wild type (H460wt) or null (H460crp53). As anticipated, radiosensitivity was higher in the H460wt cells than in the H460crp53 cell line; however, this differential radiation sensitivity did not appear to be a consequence of apoptosis. Furthermore, radiosensitivity did not appear to be reduced in association with the promotion of autophagy, as autophagy was markedly higher in the H460wt cells. Despite radiosensitization by chloroquine in the H460wt cells, the radiation-induced autophagy proved to be essentially nonprotective, as inhibition of autophagy via 3-methyl adenine (3-MA), bafilomycin A1 or ATG5 silencing failed to alter radiation sensitivity or promote apoptosis in either the H460wt or H460crp53 cells. Radiosensitivity appeared to be most closely associated with senescence, which occurred earlier and to a greater extent in the H460wt cells. This finding is consistent with the in-depth proteomics analysis on the secretomes from the H460wt and H460crp53 cells (with or without radiation exposure) that showed no significant association with radioresistance-related proteins, whereas several senescence-associated secretory phenotype (SASP) factors were upregulated in H460wt cells relative to H460crp53 cells. Taken together, these findings indicate that senescence, rather than apoptosis, plays a central role in determination of radiosensitivity; furthermore, autophagy is likely to have minimal influence on radiosensitivity under conditions where autophagy takes the nonprotective form.
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Affiliation(s)
- Jingwen Xu
- a Department of Pharmacology and Toxicology, Shenyang Pharmaceutical University, Liaoning, China
| | - Nipa H Patel
- b Department of Pharmacology and Toxicology and Medicine, Virginia Commonwealth University, Richmond, Virginia.,e Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - Tareq Saleh
- b Department of Pharmacology and Toxicology and Medicine, Virginia Commonwealth University, Richmond, Virginia.,e Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - Emmanuel K Cudjoe
- c Department of Pharmacotherapy and Outcome Sciences and Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia
| | - Moureq Alotaibi
- f Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Yingliang Wu
- a Department of Pharmacology and Toxicology, Shenyang Pharmaceutical University, Liaoning, China
| | - Santiago Lima
- d Department of Biology, Virginia Commonwealth University, Richmond, Virginia.,e Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - Adam M Hawkridge
- c Department of Pharmacotherapy and Outcome Sciences and Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia.,e Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - David A Gewirtz
- b Department of Pharmacology and Toxicology and Medicine, Virginia Commonwealth University, Richmond, Virginia.,e Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
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16
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Townsend EJ, Alotaibi M, Mills BM, Watanabe K, Seddon AM, Faul CFJ. Electroactive Amphiphiles for Addressable Supramolecular Nanostructures. ChemNanoMat 2018; 4:741-752. [PMID: 31032175 PMCID: PMC6473557 DOI: 10.1002/cnma.201800194] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Indexed: 06/06/2023]
Abstract
In this focus review we aim to highlight an exciting class of materials, electroactive amphiphiles (EAAs). This class of functional amphiphilic molecules has been the subject of sporadic investigations over the last few decades, but little attempt has been made to date to gather or organise these investigations into a logical fashion. Here we attempted to gather the most important contributions, provide a framework in which to discuss them, and, more importantly, point towards the areas where we believe these EAAs will contribute to solving wider scientific problems and open new opportunities. Our discussions cover materials based on low molecular weight ferrocenes, viologens and anilines, as well as examples of polymeric and supramolecular EAAs. With the advances of modern analytical techniques and new tools for modelling and understanding optoelectronic properties, we believe that this area of research is ready for further exploration and exploitation.
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Affiliation(s)
- E. J. Townsend
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
- Bristol Centre for Functional Nanomaterials H.H. Wills Physics LaboratoryUniversity of BristolTyndall AvenueBristolBS8 1TL
| | - M. Alotaibi
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
- Chemistry Department Faculty of ScienceKing Abdul Aziz UniversityJeddah, KSA
| | - B. M. Mills
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
| | - K. Watanabe
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
- Research Organization of Science and TechnologyRitsumeikan University1-1-1 Noji-higashiKusatsu, Shiga525-8577Japan
| | - A. M. Seddon
- Bristol Centre for Functional Nanomaterials H.H. Wills Physics LaboratoryUniversity of BristolTyndall AvenueBristolBS8 1TL
- School of Physics H.H. Wills Physics LaboratoryUniversity of BristolTyndall AvenueBristolBS8 1TL
| | - C. F. J. Faul
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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17
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Xu J, Cudjoe EK, Saleh T, Patel N, Alotaibi M, Wu Y, Lima S, Gewirtz D. Abstract 1326: Nonprotective autophagy fails to confer resistance to radiation. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-1326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Radiation remains a predominant treatment option for advanced, inoperable lung cancer, however, resistance represents a major barrier against effective therapy. The exact mechanisms through which cancer cells exhibit resistance to radiotherapy still remains unresolved. Traditionally, radiation-induced autophagy is considered as a mechanism of resistance which attenuates the antitumor effects of radiotherapy i.e., autophagy plays a cytoprotective role on cell survival. To examine this concept further, we employed H460 non-small cell lung cancer (NSCLC) cells that were either p53 wild-type (p53 +/+) or p53 null (p53 -/-) to study the contribution of autophagy to radiation sensitivity. While autophagy was markedly higher in p53 +/+ cells (determined by p62 degradation, LC3B conversion, and acidic vesicle formation) the p53 +/+ cells were actually more radiosensitive than their counterpart H460 p53 -/- cells, which showed lower levels of radiation-induced autophagy. Despite modest radiosensitization by chloroquine, alternative pharmacological (3-methly adenine) and genetic (ATG5 silencing) inhibition of autophagy failed to radiosensitize either p53 +/+ or p53 -/- cells, indicating that radiation induced autophagy is not cytoprotective in function in these experimental models. Furthermore, secretome analysis (nLC-MS/MS) of p53 +/+ H460 cells showed no significant association with radioresistance-related proteins in comparison with p53 -/- H460 cells. The rate and extent of apoptosis was quite low and similar in the two cells lines, essentially ruling out apoptotic cell death as the basis for differential radiation sensitivity. Finally, Senescence was more pronounced in the p53 +/+ cells compared to the p53 -/- cells, which may contribute to the greater radiation sensitivity in the p53 +/+ cells. However, the most relevant finding in this work was that when autophagy is the nonprotective form, it does not confer inherent radiation resistance in tumor cells.
Citation Format: Jingwen Xu, Emmanuel Kenneth Cudjoe, Tareq Saleh, Nipa Patel, Moureq Alotaibi, Yingliang Wu, Santiago Lima, David Gewirtz. Nonprotective autophagy fails to confer resistance to radiation [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 1326.
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Affiliation(s)
- Jingwen Xu
- 1Shenyang Pharmaceutical University, China
| | | | - Tareq Saleh
- 2Virginia Commonwealth University, Richmond, VA
| | - Nipa Patel
- 2Virginia Commonwealth University, Richmond, VA
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18
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Djouhri L, Smith T, Alotaibi M, Weng X. Membrane potential oscillations are not essential for spontaneous firing generation in L4 Aβ-afferent neurons after L5 spinal nerve axotomy and are not mediated by HCN channels. Exp Physiol 2018; 103:1145-1156. [PMID: 29860719 DOI: 10.1113/ep087013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 05/23/2018] [Indexed: 01/01/2023]
Abstract
NEW FINDINGS What is the central question of this study? Is spontaneous activity (SA) in L4 dorsal root ganglion (DRG) neurons induced by L5 spinal nerve axotomy associated with membrane potential oscillations in these neurons, and if so, are these membrane oscillations mediated by HCN channels? What is the main finding and its importance? Unlike injured L5 DRG neurons, which have been shown to be incapable of firing spontaneously without membrane potential oscillations, membrane potential oscillations are not essential for SA generation in conducting 'uninjured' L4 neurons, and they are not mediated by HCN channels. These findings suggest that the underlying cellular mechanisms of SA in injured and 'uninjured' DRG neurons induced by spinal nerve injury are distinct. ABSTRACT The underlying cellular and molecular mechanisms of peripheral neuropathic pain are not fully understood. However, preclinical studies using animal models suggest that this debilitating condition is driven partly by aberrant spontaneous activity (SA) in injured and uninjured dorsal root ganglion (DRG) neurons, and that SA in injured DRG neurons is triggered by subthreshold membrane potential oscillations (SMPOs). Here, using in vivo intracellular recording from control L4-DRG neurons, and ipsilateral L4-DRG neurons in female Wistar rats that had previously undergone L5 spinal nerve axotomy (SNA), we examined whether conducting 'uninjured' L4-DRG neurons in SNA rats exhibit SMPOs, and if so, whether such SMPOs are associated with SA in those L4 neurons, and whether they are mediated by hyperpolarization-activated cyclic nucleotide gated (HCN) channels. We found that 7 days after SNA: (a) none of the control A- or C-fibre DRG neurons showed SMPOs or SA, but 50%, 43% and 0% of spontaneously active cutaneous L4 Aβ-low threshold mechanoreceptors, Aβ-nociceptors and C-nociceptors exhibited SMPOs, respectively, in SNA rats with established neuropathic pain behaviors; (b) neither SMPOs nor SA in L4 Aβ-neurons was suppressed by blocking HCN channels with ZD7288 (10 mg kg-1 , i.v.); and (c) there is a tendency for female rats to show greater pain hypersensitivity than male rats. These results suggest that SMPOs are linked to SA only in some of the conducting L4 Aβ-neurons, that such oscillations are not a prerequisite for SA generation in those L4 A- or C-fibre neurons, and that HCN channels are not involved in their electrogenesis.
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Affiliation(s)
- L Djouhri
- Department of Physiology, College of Medicine, Alfaisal University, PO Box 50927, Riyadh, 11533, Saudi Arabia
| | - T Smith
- Wolfson CARD, Neurorestoration Group, Hodgkin Building, King's College London, Guy's Campus, London, SE1 1UL, UK
| | - M Alotaibi
- Department of Physiology, College of Medicine, King Saud University, PO Box 7805, Riyadh, 11472, Saudi Arabia
| | - X Weng
- Department of Neurobiology and State Key Laboratory of Proteomics, Beijing Institute of Basic Medical Sciences, Beijing, 100850, China
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19
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Almannai M, Alasmari A, Alqasmi A, Faqeih E, Al Mutairi F, Alotaibi M, Samman MM, Eyaid W, Aljadhai YI, Shamseldin HE, Craigen W, Alkuraya FS. Expanding the phenotype of SLC25A42-associated mitochondrial encephalomyopathy. Clin Genet 2018; 93:1097-1102. [PMID: 29327420 DOI: 10.1111/cge.13210] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/22/2017] [Accepted: 01/02/2018] [Indexed: 12/18/2022]
Abstract
SLC25A42 gene encodes an inner mitochondrial membrane protein that imports Coenzyme A into the mitochondrial matrix. A mutation in this gene was recently reported in a subject born to consanguineous parents who presented with mitochondrial myopathy with muscle weakness and lactic acidosis. In this report, we present 12 additional individuals with the same founder mutation who presented with variable manifestations ranging from asymptomatic lactic acidosis to a severe phenotype characterized by developmental regression and epilepsy. Our report confirms the link between SLC25A42 and mitochondrial disease in humans, and suggests that pathogenic variants in SLC25A42 should be interpreted with the understanding that the associated phenotype may be highly variable.
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Affiliation(s)
- M Almannai
- Section of Medical Genetics, Children's Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - A Alasmari
- Section of Medical Genetics, Children's Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - A Alqasmi
- Children's Hospital, King Saud Medical City, Riyadh, Saudi Arabia
| | - E Faqeih
- Section of Medical Genetics, Children's Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - F Al Mutairi
- Medical Genetics Division, Department of Pediatrics, King Abdullah International Medical Research Centre, King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia
| | - M Alotaibi
- Children's Hospital, King Saud Medical City, Riyadh, Saudi Arabia
| | - M M Samman
- Pathology and Clinical Laboratory Administration, Section of Molecular Pathology, King Fahad Medical City, Riyadh, Saudi Arabia
| | - W Eyaid
- Medical Genetics Division, Department of Pediatrics, King Abdullah International Medical Research Centre, King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Riyadh, Saudi Arabia
| | - Y I Aljadhai
- Department of Neuroimaging and Intervention, Medical Imaging Administration, King Fahad Medical City, Riyadh, Saudi Arabia
| | - H E Shamseldin
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - W Craigen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - F S Alkuraya
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.,Department of Anatomy and Cell Biology, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia.,Saudi Human Genome Program, King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
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Al-Mazidi S, Alotaibi M, Nedjadi T, Chaudhary A, Alzoghaibi M, Djouhri L. Blocking of cytokines signalling attenuates evoked and spontaneous neuropathic pain behaviours in the paclitaxel rat model of chemotherapy-induced neuropathy. Eur J Pain 2017; 22:810-821. [DOI: 10.1002/ejp.1169] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2017] [Indexed: 12/26/2022]
Affiliation(s)
- S. Al-Mazidi
- Department of Physiology; College of Medicine; King Saud University; Riyadh Saudi Arabia
- Rehabilitation Department; College of Health, and Rehabilitation Sciences; Princess Nourah Bint Abdulrahman University; Riyadh Saudi Arabia
| | - M. Alotaibi
- Department of Physiology; College of Medicine; King Saud University; Riyadh Saudi Arabia
| | - T. Nedjadi
- King Abdullah International Medical Research Center (KAIMRC); King Fahd Medical Research Center; King Abdulaziz University; Jeddah Saudi Arabia
| | - A. Chaudhary
- Center of Excellence in Genomic Medicine Research; King Abdulaziz University; Jeddah Saudi Arabia
| | - M. Alzoghaibi
- Department of Physiology; College of Medicine; King Saud University; Riyadh Saudi Arabia
| | - L. Djouhri
- Department of Physiology; College of Medicine; King Saud University; Riyadh Saudi Arabia
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21
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Alotaibi M, Alotaibi A, Ali A, Razzak HA, AlZoughool M. Understanding barriers to genetic screening for hemoglobinopathies patients in Saudi Arabia. Eur J Public Health 2017. [DOI: 10.1093/eurpub/ckx186.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Alotaibi
- General Administration for Research and Studies in Ministry of Health, KSA
- College of Public Health - King Saud Bin Abdulaziz Universty, KSA
| | - A Alotaibi
- Prince Sultan Military Medical City, College of Medicine, Al Maarefa Colleges, KSA
| | - A Ali
- Department of Statistics and Research, Ministry of Health, UAE
| | - HA Razzak
- Department of Statistics and Research, Ministry of Health, UAE
- University of Karachi, Pakistan
| | - M AlZoughool
- College of Public Health - King Saud Bin Abdulaziz Universty, KSA
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Abstract
Inhibitors of poly(ADP-ribose) polymerase (PARP) are clinically used as single-agent therapy for tumors with BRCA1 or BRCA2 mutations. One approach to expanding the use of PARP inhibitors to a wider range of tumors is to combine them with cytotoxic chemotherapy or radiotherapy. Preclinical studies in experimental animals and tumor cells in culture indicate that PARP inhibition modestly sensitizes most tumor cells to ionizing radiation. Studies of cell behavior after these combined treatments show that radiosensitization is manifested predominantly in an increase in prolonged growth arrest and senescence, with little or no contribution from apoptosis. The secretory phenotype associated with senescence can target these tumor cells for immune surveillance, and therefore increased senescence can effectively contribute to tumor control. However, the possible recovery of senescent cells and re-entry into cell cycle after prolonged arrest also needs to be considered. Such recovery could lead to tumor recurrence, yet may not be reflected in short-term assays commonly used to assess radiosensitization.
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Affiliation(s)
| | - Moureq Alotaibi
- Department of a Pharmacology, Toxicology and Medicine and.,c College of Pharmacy, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
| | - Vasily A Yakovlev
- b Radiation Oncology, Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia 23298; and
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Alotaibi M, Sharma K, Saleh T, Povirk LF, Hendrickson EA, Gewirtz DA. Radiosensitization by PARP Inhibition in DNA Repair Proficient and Deficient Tumor Cells: Proliferative Recovery in Senescent Cells. Radiat Res 2016; 185:229-45. [PMID: 26934368 PMCID: PMC4821451 DOI: 10.1667/rr14202.1] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Radiotherapy continues to be a primary modality in the treatment of cancer. In addition to promoting apoptosis, radiation-induced DNA damage can promote autophagy and senescence, both of which can theoretically function to prolong tumor survival. In this work, we tested the hypothesis that autophagy and/or senescence could be permissive for DNA repair, thereby facilitating tumor cell recovery from radiation-induced growth arrest and/or cell death. In addition, studies were designed to elucidate the involvement of autophagy and senescence in radiosensitization by PARP inhibitors and the re-emergence of a proliferating tumor cell population. In the context of this work, the relationship between radiation-induced autophagy and senescence was also determined. Studies were performed using DNA repair-proficient HCT116 colon carcinoma cells and a repair-deficient ligase IV(-/-) isogenic cell line. Exposure to radiation promoted a parallel induction of autophagy and senescence that was strongly correlated with the extent of persistent H2AX phosphorylation in both cell lines, however, inhibition of autophagy failed to suppress senescence, indicating that the two responses were dissociable. Exposure to radiation resulted in a transient arrest in the HCT116 cells while arrest was prolonged in the ligase IV(-/-) cells, however, both cell lines ultimately recovered proliferative function, which may reflect maintenance of DNA repair capacity. The PARP inhibitors, olaparib and niraparib, increased the extent of persistent DNA damage induced by radiation exposure as well as the extent of both autophagy and senescence. Neither cell line underwent significant apoptosis by radiation exposure alone or in the presence of the PARP inhibitors. Inhibition of autophagy failed to attenuate radiosensitization, indicating that autophagy was not involved in the action of the PARP inhibitors. As with radiation alone, despite sensitization by PARP inhibition, proliferative recovery was evident within a period of 10-20 days. While inhibition of DNA repair via PARP inhibition may initially sensitize tumor cells to radiation via the promotion of senescence, this strategy does not appear to interfere with proliferative recovery, which could ultimately contribute to disease recurrence.
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Affiliation(s)
- Moureq Alotaibi
- Department of Pharmacology and Toxicology, Virginia Commonwealth University
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University,
P.O. Box 2457, Riyadh, 11451, Kingdom of Saudi Arabia
| | - Khushboo Sharma
- Department of Pharmacology and Toxicology, Virginia Commonwealth University
| | - Tareq Saleh
- Department of Pharmacology and Toxicology, Virginia Commonwealth University
| | - Lawrence F. Povirk
- Department of Pharmacology and Toxicology, Virginia Commonwealth University
| | - Eric A. Hendrickson
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis MN 55455
| | - David A. Gewirtz
- Department of Pharmacology and Toxicology, Virginia Commonwealth University
- Department of Medicine, Massey Cancer Center
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Al-Tartir T, Raza S, Alotaibi M, Khan A, Hara I, Fujisawa M, Guru K. Robot-assisted surgical approach to bladder cancer: a decade of progress! MINERVA UROL NEFROL 2015; 67:55-63. [PMID: 25386697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Robot-assisted radical cystectomy (RARC) has gained popularity and proven its efficacy, safety and reproducibility in the last decade. RARC has resulted in less blood loss, enhanced recovery, and shorter hospital stay. RARC has proven to have similar or better postoperative morbidity, mortality and equal oncologic, outcomes. Limiting factors to the acceptance of this surgical approach have included its steep learning curve and the lack of both long-term outcome data. This article systematically reviews the literature comparing the outcomes for RARC (comparisons with open radical cystectomy when performed at the same institution) with a focus on operative, complications, oncologic, functional and survival outcomes.
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Affiliation(s)
- T Al-Tartir
- Urology Department Roswell Park Cancer Institute, Buffalo, NY, USA -
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Alotaibi M, Zhu F, Duggan T, Tremlett H, Kingwell E. When the death certificate says multiple sclerosis – exploring contributing causes of death. HAMDAN MEDICAL JOURNAL 2015. [DOI: 10.7707/hmj.497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Gul R, Alotaibi M, Hameedullah K, Amri HA, AlMasood A, Alabdalah M, AlKhushail A, Al Moghairi A. Incidence of in-stent re-stenosis with CATANIA Coronary Stent. J Saudi Heart Assoc 2013. [DOI: 10.1016/j.jsha.2013.03.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Alamri H, Almasood A, Norallah R, Hameed K, Almoghairi A, Alkasab S, Alabdullah M, Alotaibi M, Alanazi M, Amro A. Long-term outcomes after percutaneous coronary intervention of unprotected left main coronary disease with drug-eluting stents. J Saudi Heart Assoc 2012. [DOI: 10.1016/j.jsha.2012.06.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Almasood A, Alamri H, Sagr H, Almoghairi A, Alkhudair A, Alotaibi M. Incidence of clopidogrel resistance in Saudi population, a pilot observation study. J Saudi Heart Assoc 2012. [DOI: 10.1016/j.jsha.2012.06.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Abstract
BACKGROUND Many nursing associations in the world are facing difficulties in increasing nurses' membership. Many researchers have identified possible causes for this decline. AIM To explore factors that influence nurses' decision to join or not to join the Kuwait Nursing Association (KNA). METHODS A Professional Association Membership Questionnaire (PAMQ) developed by Yeager (1981) was used. A short demographic questionnaire and two open-ended questions developed by the researcher were added at the end of the questionnaire to gather the data sought in this study. The participants were 40 nurses who are current members of KNA and 100 nurses who had been members of KNA in the past and did not renew their membership in 2005. RESULTS This study showed that all 29 reported benefits were not very important to both groups. However, nine benefits strongly influenced the current members' decisions to join KNA, namely social activities, relief from boredom, fun, travel, improvement of health care, Something new, friendship, group benefit plans and peer group contact. The former members valued five benefits, namely education, programmes, support, professionalism and self-improvement. CONCLUSION Current and former members differ in their reasons to join or not to join the KNA. All the benefits provided by an association may not necessarily attract members and the philosophical differences between them are one of the reasons not join an association.
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Affiliation(s)
- M Alotaibi
- Health Information Administration Department, Faculty of Allied Health Sciences, Kuwait University, Sulaibikhat, Kuwait.
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Abstract
A method was developed for extraction of noroviruses from raspberries. The method consists of removal of virus from fruit surfaces by alkaline extraction, then removal of residual food debris by centrifugation, followed by concentration of virus particles by ultracentrifugation. The efficiency of the extraction was estimated by comparison of reverse transcription PCR signals obtained from fruit extracts and the norovirus suspension that was used to contaminate the fruit. Noroviruses were recovered with at least 10% efficiency from 60-g raspberry samples (n = 10). The sample treatment reported here should be applicable for harnessing to any norovirus reverse transcription PCR and form the basis of a dependable method to detect noroviruses in raspberries.
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Affiliation(s)
- A Rzezutka
- Central Science Laboratory, Sand Hutton, York Y041 ILZ, UK
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