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Ovseiko PV, Gossec L, Andreoli L, Kiltz U, Van Mens L, Hassan N, Van der Leeden M, Siddle HJ, Alunno A, Mcinnes I, Damjanov N, Apparailly F, Ospelt C, Van der Horst-Bruinsma I, Nikiphorou E, Druce K, Szekanecz Z, Sepriano A, Avcin T, Bertsias G, Schett G, Keenan AM, Coates LC. THU0580 EULAR TASK FORCE ON GENDER EQUITY IN ACADEMIC RHEUMATOLOGY: PRELIMINARY SURVEY FINDINGS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.3384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Women represent an increasing proportion of the overall rheumatology workforce, but are underrepresented in academic rheumatology, especially in leadership roles [1].Objectives:The EULAR Task Force on Gender Equity in Academic Rheumatology has been convened to establish the extent of the unmet need for support of female rheumatologists, health professionals and non-clinical scientists in academic rheumatology and develop a framework to address this through EULAR and EMEUNET.Methods:To investigate gender equity in academic rheumatology, an anonymous web-based survey was targeted at the membership of EULAR and Emerging EULAR Network (EMEUNET) and their wider networks. The survey was developed based on a narrative literature review [1], best practice from The Association of Women in Rheumatology, a survey of task force members and face-to-face task force discussions. Personal experiences were explored and 24 potential interventions to aid career advancement were ranked. Statistics were descriptive with significance testing for male/female responses compared using chi-squared/t-tests. The level of significance was set at p<0.001.Results:A total of 301 respondents from 24 countries fully completed the survey. By profession, 290 (86.4%) were rheumatologists, 19 (6.3%) health professionals, and 22 (7.3%) non-clinical scientists. By gender, 217 (72.1%) were women, 83 (27.6%) men, and 1 (0.3%) third gender. By age, 203 (67.5%) were 40 or under. By ethnicity, 30 (10.0%) identified themselves as ethnic minority. A high proportion of respondents reported having experienced gender discrimination (47.2% total: 58.1% for women and 18.1% for men) and sexual harassment (26.2%: 31.8% and 10.8% respectively) (Figure 1). Chi-squared tests on the numbers on which these proportions were based showed statistically significant differences between women and men in having experienced gender discrimination (Χ2=36.959 (df=1), p <0.001) and sexual harassment (Χ2=12.633 (df=1), p <0.001). The highest-ranked interventions for career advancement regardless of respondents’ gender included: leadership skills training; speaking/presentation/communication skills training; information on training/career pathways; effective career planning training; support on grant writing applications; and high-impact scientific writing master-classes (Figure 2). Only 8 of 24 proposed interventions showed a significantly higher ranking (p<0.001) by female respondents and these typically related to promotion of female role models and gender-balance in committees, editorial boards and research funding (Figure 2).Figure 1.Perceived gender discrimination and sexual harassment, 301 responsesFigure 2.Mean perceived utility of potential interventions for career advancement by gender and statistically significant gender differences (p<.001), 300 responsesConclusion:The results of the survey will inform the development of task force policy proposals for interventions to support career advancement among EULAR and EMEUNET members. The identified interventions have potential to support career advancement of all rheumatologists, health professionals and non-clinical scientists regardless of gender.References:[1]Andreoli L, Ovseiko PV, Hassan N, Kiltz U, van Mens L, Gossec L, et al. Gender equity in clinical practice, research and training: Where do we stand in rheumatology? Joint, Bone, Spine: Revue du Rhumatisme. 2019;86(6):669-672.Acknowledgments:We gratefully acknowledge the rheumatologists, health professionals and non-clinical scientists who responded to the survey.Disclosure of Interests:Pavel V Ovseiko: None declared, Laure Gossec Grant/research support from: Lilly, Mylan, Pfizer, Sandoz, Consultant of: AbbVie, Amgen, Biogen, Celgene, Janssen, Lilly, Novartis, Pfizer, Sandoz, Sanofi-Aventis, UCB, Laura Andreoli: None declared, Uta Kiltz Grant/research support from: AbbVie, Amgen, Biogen, Novartis, Pfizer, Consultant of: AbbVie, Biocad, Eli Lilly and Company, Grünenthal, Janssen, Novartis, Pfizer, UCB, Speakers bureau: AbbVie, MSD, Novartis, Pfizer, Roche, UCB, Leonieke van Mens: None declared, Neelam Hassan: None declared, Marike van der Leeden: None declared, Heidi J Siddle: None declared, Alessia Alunno: None declared, Iain McInnes Grant/research support from: Bristol-Myers Squibb, Celgene, Eli Lilly and Company, Janssen, and UCB, Consultant of: AbbVie, Bristol-Myers Squibb, Celgene, Eli Lilly and Company, Gilead, Janssen, Novartis, Pfizer, and UCB, Nemanja Damjanov Grant/research support from: from AbbVie, Pfizer, and Roche, Consultant of: AbbVie, Gedeon Richter, Merck, Novartis, Pfizer, and Roche, Speakers bureau: AbbVie, Gedeon Richter, Merck, Novartis, Pfizer, and Roche, Florence Apparailly: None declared, Caroline Ospelt Consultant of: Consultancy fees from Gilead Sciences., Irene van der Horst-Bruinsma Grant/research support from: AbbVie, Novartis, Eli Lilly, Bristol-Myers Squibb, MSD, Pfizer, UCB Pharma, Consultant of: AbbVie, Novartis, Eli Lilly, Bristol-Myers Squibb, MSD, Pfizer, UCB Pharma, Elena Nikiphorou: None declared, Katie Druce Speakers bureau: Pfizer and Lilly, Zoltán Szekanecz Grant/research support from: Pfizer, UCB, Consultant of: Sanofi, MSD, Abbvie, Pfizer, Roche, Novertis, Lilly, Gedeon Richter, Amgen, Alexandre Sepriano: None declared, Tadej Avcin: None declared, George Bertsias Grant/research support from: GSK, Consultant of: Novartis, Georg Schett Speakers bureau: AbbVie, BMS, Celgene, Janssen, Eli Lilly, Novartis, Roche and UCB, Anne Maree Keenan: None declared, Laura C Coates: None declared
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Khairil Anwar N, Idris A, Hassan N. Isolation and identification of halophilic microorganisms in soy sauce. FOOD RESEARCH 2020. [DOI: 10.26656/fr.2017.4(s2).s04] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Microorganisms play an important role in the fermentation of soy sauce as they produce
flavoring compounds which contribute to the desired taste and quality of soy sauce. The
aim of this study was to isolate and identify halophilic microorganisms that are involved
in the first stage (Koji) and second stage (Moromi) of soy sauce fermentation. In this
study, soy sauce samples were collected from a local company located in Johor Bahru.
The microorganisms were identified using Analytical Profile Identification (API) system
and 16s ribosomal RNA (bacteria)/Internal Transcribed Spacer region (fungi and yeast)
sequencing. In the koji fermentation, one fungus was isolated and identified as Aspergillus
oryzae. During the moromi fermentation, one lactic acid bacteria and two yeasts were
identified, including Tetragenococcus halophilus, Candida versatilis and Candida
etchellsii. These halophilic microorganisms can be used as starter culture in moromi stage
to shorten the fermentation period.
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Allow AK, Abdulmogni S, Bakrim NM, Hassan N, Mahmud MI.AM. REVERSIBILITY OF THE EFFECTS CAUSED BY FENUGREEK SEEDS AQUEOUS (FSA) EXTRACT ON THE ESTROUS CYCLE AND REPRODUCTIVE HORMONES IN THE RAT ANIMAL MODEL. IIUM MEDICAL JOURNAL MALAYSIA 2020. [DOI: 10.31436/imjm.v14i1.1409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Haq S, Wang H, Kim JJ, Kwon EY, Banskota S, Grondin J, Hassan N, Brumell J, Philpott D, Khan WI. A209 ROLE OF SEROTONIN-AUTOPHAGY AXIS IN REGULATION OF EPITHELIAL CELL FUNCTION AND MICROBIOTA COMPOSITION IN GUT. J Can Assoc Gastroenterol 2020. [DOI: 10.1093/jcag/gwz047.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Serotonin (5-hydroxytryptamine; 5-HT), an enteric signalling molecule mainly produced by the enterochromaffin (EC) cells of the intestinal epithelium regulates various processes of the gut. Tryptophan hydroxylase 1 (Tph1) is the rate-limiting enzyme of 5-HT biosynthesis in EC cells. In inflammatory bowel disease (IBD) and experimental colitis, there are alterations in 5-HT content and microbiota composition in the gut. Previously we reported, Tph1-deficient (Tph1-/-) mice with reduced 5-HT in the gut exhibit reduced susceptibility to colitis. The mechanism by which 5-HT regulates colitis is unknown. Autophagy, a catabolic process regulates the function of intestinal epithelial cells (IECs), gut microbiota, and protects against intestinal inflammation. Both aberrant 5-HT signalling and autophagy is implicated in colitis. It is unclear whether they interact in regulation of production of pro-inflammatory cytokines from IECs and gut microbiota composition in relation to colitis. Our hypothesis is, an increase in 5-HT signalling inhibits autophagy in the IECs, which results in up-regulation of colitis by increasing the production of pro-inflammatory cytokines, and by selection for a more colitogenic microbiota.
Aims
To define the role of 5-HT-autophagy axis in the production of pro-inflammatory cytokines from IECs and gut microbiota composition in intestinal inflammation.
Methods
We investigated level of autophagy with or without 5% dextran sodium sulphate (DSS) in colons, mucosal scraping and IECs of Tph1-/- and their wild-type (WT) littermates. In addition, autophagy and proinflammatory cytokine production were investigated in human colonic epithelial cells (HT-29) following stimulation by 5-HT. We evaluated colitis and gut microbiota composition in WT, Tph1-/-, epithelial-specific autophagy gene Atg7 deficient (Atg7ΔIEC), and Atg7ΔIECTph1-/- (double knock out; DKO) mice.
Results
Tph1 -/- mice, with less 5-HT in the gut than WT mice following DSS administration exhibited an up-regulation of autophagy markers in the colon, mucosal scraping and IECs along with reduction of colitis severity. 5-HT treatment of HT-29 cells resulted in down-regulation of autophagy and upregulation of pro-inflammatory cytokine, IL-8. DKO mice exhibited increased severity of DSS-colitis, and altered microbiota composition compared to Tph1-/- mice.
Conclusions
These findings suggest, an increase in 5-HT in colitis inhibits autophagy in the IECs that contribute to alteration of the gut microbiota and disease severity. Blocking 5-HT signalling may promote autophagy in the IECs and alleviate the severity of colitis. Understanding the contribution of 5-HT in autophagy may identify new therapeutic target in IBD and other intestinal inflammatory conditions that exhibit dysregulated autophagy.
Funding Agencies
CAG, CIHR
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Purba TS, Ng'andu K, Brunken L, Smart E, Mitchell E, Hassan N, O'Brien A, Mellor C, Jackson J, Shahmalak A, Paus R. CDK4/6 inhibition mitigates stem cell damage in a novel model for taxane-induced alopecia. EMBO Mol Med 2019; 11:e11031. [PMID: 31512803 PMCID: PMC6783643 DOI: 10.15252/emmm.201911031] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/13/2019] [Accepted: 08/16/2019] [Indexed: 01/29/2023] Open
Abstract
Taxanes are a leading cause of severe and often permanent chemotherapy‐induced alopecia. As the underlying pathobiology of taxane chemotherapy‐induced alopecia remains poorly understood, we investigated how paclitaxel and docetaxel damage human scalp hair follicles in a clinically relevant ex vivo organ culture model. Paclitaxel and docetaxel induced massive mitotic defects and apoptosis in transit amplifying hair matrix keratinocytes and within epithelial stem/progenitor cell‐rich outer root sheath compartments, including within Keratin 15+ cell populations, thus implicating direct damage to stem/progenitor cells as an explanation for the severity and permanence of taxane chemotherapy‐induced alopecia. Moreover, by administering the CDK4/6 inhibitor palbociclib, we show that transit amplifying and stem/progenitor cells can be protected from paclitaxel cytotoxicity through G1 arrest, without premature catagen induction and additional hair follicle damage. Thus, the current study elucidates the pathobiology of taxane chemotherapy‐induced alopecia, highlights the paramount importance of epithelial stem/progenitor cell‐protective therapy in taxane‐based oncotherapy, and provides preclinical proof‐of‐principle in a healthy human (mini‐) organ that G1 arrest therapy can limit taxane‐induced tissue damage.
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Ateteallah H, Abd-Elkarim N, Hassan N. Effect of Adding Beetroot Juice and Carrot Pulps on Rheological, Chemical, Nutritional and Organoleptic Properties of Ice Cream. JOURNAL OF FOOD AND DAIRY SCIENCES 2019; 10:175-179. [DOI: 10.21608/jfds.2019.48281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Kandil O, Hassan N, Sedky D, Beshir Ata E. Studies on the specific immunodiagnosis of cystic echinococcosis in camels using enzyme-linked immunosorbent assay. BULGARIAN JOURNAL OF VETERINARY MEDICINE 2019. [DOI: 10.15547/bjvm.2136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Cystic echinococcosis (CE) is of increasing public health and socio-economic concern because of the large morbidity rates and produced high economic losses in the livestock industry. The objective of the current research was to study the reliability of indirect ELISA in detecting CE, based on two dif-ferent types of crude antigens of camel origin; protoscolex and germinal layer antigens from hydatid cyst. Blood samples were collected from 284 (125 slaughtered and 159 live camels). Out of 125 slaughtered camels examined visually, 55 (44%) were found to have hydatid cysts. Of them, 52/125 (41.6%) and 3/125 (2.4%) harboured hydatid cysts in lungs and livers respectively. Fertile lung cysts were 32.8%; 26.9% were sterile, while 40.3% of lung and liver cysts were calcified. The sensitivity of ELISA was 83% and 46.5% when protoscolex and germinal layer antigens were used, respectively. The respective specificity of antigens of protoscolex and germinal layer was 70.3% and 41.7%. The protoscolex antigen showed higher accuracy (73.6%) compared to the germinal layer antigen (52.8%). The cross reactivity of these antigens were evaluated with antigens and hyperimmune sera of CE and Fasciola spp. and Haemonchus contortus using ELISA. The results showed also weak immunogenic potency of each antigen with Fasciola spp. hyperimmune sera at dilution 1:50 while hyperimmune sera of Haemonchus contortus did not bind any antigen.
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Khan Z, Ahmad S, Jeragh A, Alfouzan W, Al Foudri H, Hassan N, Asadzadeh M, Joseph L, Varghese S. First isolation of Ascotricha chartarum from bronchoalveolar lavage of two patients with pulmonary infections. New Microbes New Infect 2018; 28:11-16. [PMID: 30766685 PMCID: PMC6363919 DOI: 10.1016/j.nmni.2018.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 12/18/2018] [Accepted: 12/19/2018] [Indexed: 11/12/2022] Open
Abstract
Ascotricha chartarum is a rare human pathogen. We describe the isolation and characterization of A. chartarum from bronchoalveolar lavage samples of two patients with underlying pulmonary infections. The identity of both isolates was established by typical phenotypic characteristics and by sequencing of the internal transcribed spacer region and D1/D2 domains of recombinant DNA and β-tubulin gene fragment. The demonstration of branched, septate hyphae in direct microscopic examination of both the specimens and isolation of the fungus in pure cultures suggest its aetiologic role in the disease process. Because of phenotypic similarities of A. chartarum with Chaetomium spp. and other Chaetomium-like fungi, the application of molecular methods is needed for its accurate identification. Although in the absence of histopathologic evidence the aetiologic role of A. chartarum could not be established unequivocally, nonetheless, in view of the rarity of its isolation from clinical specimens and demonstration of hyphal elements in bronchoalveolar lavage sample, this report assumes considerable significance. It serves to create awareness about environmental fungi that previously have missed attention but may play a role in respiratory infections.
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Bakar HA, Abd. Aziz MZA, Ahmad BH, Hassan N. Design of Circular Polarized Antenna by Using Inverted Suspended Circular Patch Design for WLAN Application at 2.4 GHz. JOURNAL OF PHYSICS: CONFERENCE SERIES 2018; 1049:012031. [DOI: 10.1088/1742-6596/1049/1/012031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Ruff J, Hassan N, Morales-Zavala F, Steitz J, Araya E, Kogan MJ, Simon U. CLPFFD-PEG functionalized NIR-absorbing hollow gold nanospheres and gold nanorods inhibit β-amyloid aggregation. J Mater Chem B 2018; 6:2432-2443. [PMID: 32254460 DOI: 10.1039/c8tb00655e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Gold nanoparticles with specific optical properties in combination with the CLPFFD peptide that exhibits selectivity for β-amyloid (Aβ) aggregates are promising photothermal absorbers for application in Alzheimer's disease therapy. We report on hollow gold nanospheres (HAuNS) and gold nanorods (AuNR), which exhibit strong plasmonic near infrared (NIR) absorbance in the optical window of biological tissue and which are functionalized with CLPFFD in two different ways. Therefore the peptide was either directly bound to the particle surface or indirectly to a particle-protecting polyethylene glycol (PEG) ligand shell, thereby reducing the CLPFFD density on the surfaces of both types of particles. Fully PEGylated particles were used for comparison. The effects on cell viability and the fundamental suitability of the HAuNS and AuNR conjugates as photothermal absorbers to inhibit Aβ-fibrillation are analysed in vitro. The positive influence of the use of PEG ligands on the reduced cytotoxicity of the conjugates and on the Aβ-disaggregation is discussed.
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Holt L, Liddy N, Bossi G, Harper J, Dukes J, Paston S, Mahon T, Molloy P, Sami M, Baston E, Cameron B, Powesland A, Johnson A, Hassan N, Vuidepot A, Coughlin C, Jakobsen B. Engineering high affinity, soluble T cell receptors for the treatment of cancer. Eur J Cancer 2018. [DOI: 10.1016/j.ejca.2018.01.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hassan N, Cordero ML, Sierpe R, Almada M, Juárez J, Valdez M, Riveros A, Vargas E, Abou-Hassan A, Ruso JM, Kogan MJ. Peptide functionalized magneto-plasmonic nanoparticles obtained by microfluidics for inhibition of β-amyloid aggregation. J Mater Chem B 2018; 6:5091-5099. [DOI: 10.1039/c8tb00206a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Synthesis of magneto-plasmonic nanoparticles for the inhibition of β-amyloid fibril formation.
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Bakar HA, Aziz MZAA, Ahmad BH, Hassan N. Inverted suspended circular polarized antenna with the integration of metasurface (MS) structure technique. 2017 PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM - FALL (PIERS - FALL) 2017. [DOI: 10.1109/piers-fall.2017.8293365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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El-Bindary A, Hassan N, El-Afify M. Synthesis and structural characterization of some divalent metal complexes: DNA binding and antitumor activity. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.07.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Hong Y, Hassan N, Cheah YK, Jalaludin MY, Kasim ZM. Management of T1DM in children and adolescents in primary care. MALAYSIAN FAMILY PHYSICIAN : THE OFFICIAL JOURNAL OF THE ACADEMY OF FAMILY PHYSICIANS OF MALAYSIA 2017; 12:18-22. [PMID: 29423125 PMCID: PMC5802777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The Clinical Practice Guidelines on the Management of Type 1 Diabetes Mellitus in Children & Adolescents was developed by a multidisciplinary development group and approved by the Ministry of Health Malaysia in 2015. A systematic review of 15 clinical questions was conducted using the evidence retrieved mainly from MEDLINE and Cochrane databases. Critical appraisal was done using the Critical Appraisal Skills. Recommendations were formulated on the accepted 136 evidences using the principles of Grading Recommendations, Assessment, Development and Evaluation tailored to the local setting. Type 1 diabetes mellitus is a chronic disease, which usually occurs at an early age, and is associated with various complications including retinopathy, nephropathy, neuropathy and cardiovascular morbidity. Good glycaemic control early in the disease results in lower frequency of chronic diabetes complications, which in turn reduces the healthcare cost. Accurate classification of diabetes and optimum management with the aim to achieve glycaemic targets is of utmost importance.
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Hassan N, Speight L, Wilby A, Sayers A, Evans S, Byrne A, Smith A, Ketchell R, Lau D, Duckers J. 406 A survey of nausea and vomiting (N&V) at clinical stability and during IV antibiotics in adult cystic fibrosis patients attending the All Wales Adult CF Centre (AWACFC). J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30736-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Gwilym O, Sayers A, Hassan N, Prosser A, Speight L, Ketchell R, Lau D, Byrne A, Duckers J. 404 SPARC questionnaire: identifying needs in people with cystic fibrosis (CF) attending the All Wales Adult CF Centre (AWACFC). J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30734-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Almada M, Leal-Martínez BH, Hassan N, Kogan MJ, Burboa MG, Topete A, Valdez MA, Juárez J. Photothermal conversion efficiency and cytotoxic effect of gold nanorods stabilized with chitosan, alginate and poly(vinyl alcohol). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:583-593. [PMID: 28532069 DOI: 10.1016/j.msec.2017.03.218] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 02/02/2017] [Accepted: 03/23/2017] [Indexed: 10/19/2022]
Abstract
Gold nanorods (GNR) use has been proposed in medical applications because of their intrinsic photothermal properties. However, the presence of CTAB molecules adsorbed onto the surface of GNRs results in a highly cytotoxic GNR system. In this work we replace the CTAB molecules with a thiolated chitosan. Once chitosan coated GNRs (Chi-SH-GNR) were attained, a film of alginate (Alg-Chi-SH-GNR) or polyvinyl alcohol (PVA-Chi-SH-GNR) was deposited onto the surface of Chi-GNR by a layer-by-layer process. The photothermal conversion efficiency for the GNR systems was determined irradiating the GNRs suspended in aqua media with a CW 808nm diode laser (CNI, China). The cytotoxicity effect and the photothermal cellular damage of GNR systems were evaluated on a breast cancer cell line. Results show that polymer coats did not affect the transduction photothermal efficiency. Values around 50% were obtained for the different coated gold nanorods. The cytotoxicity of coated gold nanorods diminished significantly compared with those GNR stabilized with CTAB. The laser irradiation of cells treated with gold nanorods showed a decrease in their viability compared with the cells treated but no irradiated.
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Lech P, Vatan A, Modas Daniel P, Tsai HR, Vidal Perez RC, Anwer S, Gorriz Magana J, Giavarini A, Katbeh A, Lo Iudice F, Hayashida A, Lembo M, Jamiel AM, Peacock K, Wong CY, Ministeri M, Woolf A, Carbone A, Ma G, Lee AF, Ripley DP, Karabag T, Arslan C, Yakisan T, Sak D, Galrinho A, Ramos R, Aguiar Rosa S, Viveiros Monteiro A, Branco LM, Morais L, Rodrigues I, Figueiredo L, Ferreira RC, Lin CC, Wu HY, Chen TY, Tsai WC, Castineiras Busto M, Pena Gil C, Trillo Nouche R, Lopez Otero D, Bandin Dieguez MA, Martinez Monzonis A, Gonzalez-Juanatey JR, Atef M, Hassan N, Aboulfotouh Y, Moharem-Elgamal S, Katta A, Seleem M, Meshaal M, Lopez Pais J, Monjas Garcia S, Mata Caballero R, Molina Blazquez L, Alcon Duran B, Alcocer Ayuga M, Fraile Sanz A, Saavedra Falero J, Alonso Martin JJ, Barosi A, Vanelli P, Cerchiello M, Islas Ramirez F, De Agustin A, Marcos Alberca P, Nombela L, Jimenez P, Fernandez Ortiz A, Luis Rodrigo J, Perez De Isla L, Macaya C, Petitto M, Schiano Lomoriello V, Imbriaco M, Trimarco B, Galderisi M, Kagiyama N, Hirohata AH, Yamamoto K, Yoshida K, Santoro C, Esposito R, Gerardi D, Sellitto V, Trimarco B, Galderisi M, Ahmed AM, Alharbi AS, Savis A, Bellsham-Revell H, Salih C, Simpson JM, Uebing U, Gatzoulis M, Li WL, Jaber W, Salerno G, Rea G, D'andrea A, Di Maio M, Limongelli G, Muto M, Pacileo G. Clinical Case Poster session 1P501The incremental value of advanced cardiovascular multi-modality imaging in the investigation of a cardiac massP502Metastatic adenocarsinoma involving the right ventricle and pulmonary artery leading right heart failureP503A malignant cause of angina in hypertrophic cardiomyopathyP504Dyspnea in a severe mitral stenotic gentleman with hypereosinophiliaP505After transcatheter aortic valve implantation be aware of infections, a case of fistulization from left ventricular outflow track to left atriumP506Myocardial infarction masking infective endocarditisP507Subendocardial abscess by contiguity of a valvular vegetationP508Real-time three-dimensional transesophageal echocardiography as compared to in vivo anatomy in a case of Candida parapsilosis native mitral valve endocarditisP509TAVI in prosthetic heart valve failure : echocardiography guided transcatether percuntaneous valve in valve implantation (VIV) for failed TAVI corevalve bioprosthesisP510Functional-anatomic matching between longitudinal strain pattern and late gadolinium enhancement of cardiac amyloidosis at presentationP511Heart failure due to masked systolic atrial contraction detected by pulmonary venous flow in a patient with ventricular pacingP512The detection of early left ventricular dysfunction by global longitudinal strain is helpful to keep in adjuvant therapy breast cancer patients till completionP513Forgotten cause of known disease: pulmonary hypertension caused by schistosomiasisP515Single coronary origin delineation by echocardiography alone in a patient with tetralogy of fallot changing the surgical planP516A rare complication after multiple valve repairP517Unusual cause of cyanosis in a young adult with cavopulmonary connectionsP518Abnormal flow in the main pulmonary artery in adult patients: a tale of 2 shuntsP519Unexpected TEE finding: mediastinal lipomatosis can fake an aortic intramural haematoma. Eur Heart J Cardiovasc Imaging 2016. [DOI: 10.1093/ehjci/jew247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abou-El-haded Ibrahim H, Abd El-Atty S, Hindy OW, Hassan N. Hyperprolactinemiemia and infertility in Egypt. BIOCHEMISTRY LETTERS 2016; 11:18-26. [DOI: 10.21608/blj.2016.47841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Alhubail R, Hassan N. Effect of insertion route on risk of central line-associated bloodstream infection in critically ill patients. Crit Care 2015. [PMCID: PMC4472965 DOI: 10.1186/cc14156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hassan N, Hammodi A, Alhubail R, Alazem A, Rayyan N. Erratum to: Effect of insertion route on risk of central line-associated bloodstream infection in critically ill patients. Crit Care 2015; 19:315. [PMID: 26338294 PMCID: PMC4559918 DOI: 10.1186/s13054-015-1001-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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48
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Oreaba R, Attia A, Hassan N, Farahat I, Khalifa H. 194. Outcome of breast conservation therapy in early breast carcinoma in Egyptian female patients. Clinico-pathological study for the patterns of treatment failure. Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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49
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Shingler W, Harper J, Bossi G, Barker D, Dukes J, Liddy N, Paston S, Mahon T, Molloy P, Sami M, Baston E, Cameron B, Johnson A, Vuidepot A, Hassan N, McGrath Y, Jakobsen B. 126 IMCgp100: A novel bi-specific biologic for the treatment of malignant melanoma. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70252-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Purkayastha N, Hassan N, Bharadwaj A, Gendi N, Ginawi A, Nandagudi A. AB0846 Audit on Gout Management, Adhering to the BSR and Eular Guidelines. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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