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1.
BMC Public Health ; 24(1): 1119, 2024 Apr 23.
Artigo em Inglês | MEDLINE | ID: mdl-38654180

RESUMO

OBJECTIVE: This study aims to test the reliability and validity of the translated Arabic version of EQ-5D-5 L. METHODS: The study was conducted on 100 patients operated upon for degenerative spine diseases coming for follow up in the outpatient clinic of a Tertiary care hospital. Test-retest reliability was assessed by completing the self-administered tool in two follow up visits, one week apart, by 50 patients. Internal consistency was evaluated by Cronbach's alpha. Intra-class correlation coefficients and kappa statistics were performed to test for the agreement between the two ratings. Criterion validity was assessed by comparing the responses of 100 patients to the EQ-5D-5 L with scores of two validated questionnaires; the Arabic version of the Oswestry disability index and the Arabic version of short-form health survey-36. The construct validity was assessed using known-groups comparison to test for hypothesized differences concerning demographic and clinical variables. RESULTS: The Arabic version of EQ-5D-5 L questionnaire had a high reliability with high observed internal consistency (Cronbach's alpha = 0.816, CI: 0.719-0.886). It showed strong temporal stability, with ICCs of the EQ-5D-5 L score, index and EQ-visual analog scale (EQ-VAS) of 0.852, 0.801, and 0.839 respectively. Agreement by kappa was moderate; above 0.4, for all domains, except for the "Usual activities" domain. EQ-5D-5 L domains, VAS and index had moderate to strong significant correlations with SF-36 and ODI subscales and total scores in the correct direction indicating a good criterion validity of the instrument. CONCLUSION: The Arabic version of EQ-5D-5 L is reliable and valid for assessment of HRQoL of Arabic speaking patients.


Assuntos
Doenças da Coluna Vertebral , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Inquéritos e Questionários/normas , Reprodutibilidade dos Testes , Doenças da Coluna Vertebral/psicologia , Qualidade de Vida , Adulto , Idoso , Traduções , Psicometria
2.
Biologics ; 17: 1-9, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36698375

RESUMO

Background: Dysregulation of both cellular and humoral immune responses is central in systemic lupus erythematosus (SLE) pathogenetic mechanisms. Proinflammatory cytokines, such as interleukin 23 (IL23), and their roles in promoting such dysregulation have recently been highly considered. This research compared IL23 serum levels in 85 Egyptian SLE patients and 85 healthy controls. Then, IL23 level was correlated to various SLE disease parameters, disease activity, and damage indices. Results: IL23 serum levels were significantly elevated in SLE patients versus healthy individuals. Furthermore, IL23 levels were positively correlated with SLE disease activity index (SLEDAI) and were positively correlated with arthritis, seizures, consumption of complements (C3, C4), and with parameters of nephritis (hematuria, pyuria, casts, and proteinuria). A positive correlation was also found between IL23 levels and oral prednisolone dose. Conclusion: IL23 has higher levels in the serum of SLE patients, and is correlated to activity of the disease, especially lupus nephritis. Further researchis needed to explore its exact role in SLE pathogenesis and whether it can be considered a potential biomarker or therapeutic target in SLE.

3.
Med Teach ; 45(2): 128-138, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-35543323

RESUMO

Leadership and management are becoming increasingly recognised as vital for high-performing organisations and teams in health professions education. It is often difficult for those embarking on leadership activities (as well as more experienced leaders) to find their way through the volume of literature and generic information on the topic. This guide aims to provide a framework for developing educators' understanding of leadership, management, and followership in the context of health professions education. It explains many relevant approaches to leadership and suggests various strategies through which educators can develop their practice to become more effective.


Assuntos
Ocupações em Saúde , Liderança , Humanos
4.
Br J Hosp Med (Lond) ; 83(1): 1-9, 2022 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-35129379

RESUMO

Research carried out in 2016 by two of the authors of this article investigated the role that leadership 'theory' plays within an individual's leadership development and identified other components of clinical leadership programmes that are key to enabling the development of future leaders. While early career doctors identified leadership theories and concepts as important within their development as clinical leaders, these must be closely tied to real-life practices and coupled with activities that aim to develop an increased self-awareness, understanding of others, clinical exposure and leadership tools that they can use in practice. During a healthcare crisis, such as a global pandemic, maintaining a focus on leadership development (particularly for more junior clinicians) might not be seen as important, but leadership is needed to help people and organisations 'get through' a crisis as well as help develop leadership capacity for the longer term. This article, drawing from contemporary literature, the authors' own research and reflections, discusses how leadership development needs to continually adapt to meet new demands and sets out tips for those involved with clinical leadership development.


Assuntos
Liderança , Médicos , Atenção à Saúde , Humanos , Pandemias/prevenção & controle
5.
Adv Med Educ Pract ; 13: 11-25, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35046744

RESUMO

BACKGROUND: Crises in academia can best be dealt with as a polarity that needs to be leveraged rather than a problem that needs to be solved. This work aimed at utilizing the Polarity Approach for Continuity and Transformation (PACT)™ to establish a guide for medical schools during times of crisis to minimize the effect of crisis-driven decisions on strategic growth. SUBJECTS AND METHODS: A qualitative study following the 5-Steps of the PACT process was conducted. A virtual mapping session was held with 108 medical educators from 22 countries to determine the upsides and downsides of strategic orientation and crisis management subsequently. RESULTS: Four polarity maps were generated identifying four tension areas; University reputation, mission, teams, and individuals followed by a 72-item assessment and another mapping session to map the warning signs and action steps. A comparison between private school scores and the whole cohort of respondents showed that private schools had the least problems in team-oriented work. CONCLUSION: This study highlighted the importance of taking measures to communicate the mission and supporting team functions inside universities either by enhancing resources or utilizing time and effort-saving strategies.

6.
Br J Hosp Med (Lond) ; 81(11): 1-9, 2020 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-33263482

RESUMO

This article summarises the findings from a review of publications related to healthcare leadership that were published during the first wave of the COVID-19 crisis in 2020. The review discusses a range of strategies for leaders to adopt in challenging situations and identifies three aspects of leadership which are considered essential when leading teams during a crisis: 1) communication, 2) decision making and 3) mental health and wellbeing. This article identifies key principles for each of these three aspects and provides practical tips for how leaders can use the lessons learned from the pandemic in their own contexts.


Assuntos
COVID-19/epidemiologia , Liderança , Comunicação , Tomada de Decisões , Humanos , Saúde Mental , Pandemias , SARS-CoV-2
7.
J Microsc Ultrastruct ; 8(3): 96-103, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33282684

RESUMO

BACKGROUND: Myocardial infarction is a major heart disease and is considered a significant reason for mortality and morbidity around the world. The model of Isoproterenol (ISO)-induced myocardial infarction provides a supported method for investigating the impacts of numerous possible cardioprotective bioactive substances. Nitric Oxide (NO) could react with reactive oxygen intermediates and free radicals to create harmful species. For several years, researchers have investigated the use of herbs and natural products as antioxidants to protect the body's organs against toxins and drug metabolites. However, studies on the antioxidant effects of ginger against cardiotoxicity induced by drugs and toxic agents remain insufficient, especially its effects on NO. AIMS AND OBJECTIVES: This study aimed to investigate the possible antioxidant and protective role of ginger in ISO-induced acute myocardial infarction in experimental rats. Special emphasis was given to the impact of ginger on NO levels. MATERIALS AND METHODS: Forty adult male albino rats were used in this study. The animals were randomly divided into four equal groups. Group I served as control and received a normal mouse diet. Group II received ginger extract orally, Group III received normal diet for eight weeks, followed by ISO administration subcutaneously to induce myocardial infarction, Group IV received ginger extracts, followed by ISO. RESULTS AND CONCLUSIONS: The results of this study illustrated ginger's protective role against ISO-induced acute myocardial infarction. This role is mainly due to ginger's antioxidant and anti-inflammatory properties. We assume that sufficient intake of ginger by individuals who are regularly exposed to ISO would be beneficial in overcoming the cardiotoxicity of ISO. The effects of ginger may take place through inhibition of NOS enzymes, which needs further immunohistochemical and biochemical studies to reveal the underlying different mechanisms of the effects of ginger at the molecular and structural levels.

8.
BMC Med Educ ; 20(1): 400, 2020 Nov 02.
Artigo em Inglês | MEDLINE | ID: mdl-33138818

RESUMO

BACKGROUND: COVID - 19 pandemic pressured medical schools globally to shift to Distance learning (DL) as an alternative way to ensure that the content delivered is satisfactory for student progression. AIM OF THE WORK: This work aims at mapping priorities for post-COVID planning for better balance between distance learning and face to face learning. METHODS: This qualitative study aimed to develop a model for utilizing DL using The Polarity Approach for Continuity and Transformation (PACT)™. A virtual mapping session was held with 79 faculty from 19 countries. They worked in small groups to determine upsides and downsides of face-to-face and DL subsequently. An initial polarity map was generated identifying five tension areas; Faculty, Students, Curriculum, Social aspects and Logistics. A 63-item assessment tool was generated based on this map, piloted and then distributed as a self-administered assessment. The outcomes of this assessment were utilized for another mapping session to discuss warning signs and action steps to maintain upsides and avoid downsides of each pole. RESULTS: Participants agreed that face-to-face teaching allows them to inspire students and have meaningful connections with them. They also agreed that DL provides a good environment for most students. However, students with financial challenges and special needs may not have equal opportunities to access technology. As regards social issues, participants agreed that face-to-face learning provides a better chance for professionalism through enhanced team-work. Cognitive, communication and clinical skills are best achieved in face-to-face. Participants agreed that logistics for conducting DL are much more complicated when compared to face-to-face learning. Participants identified around 10 warning signs for each method that need to be continuously monitored in order to minimize the drawbacks of over focusing on one pole at the expense of the other. Action steps were determined to ensure optimized use of in either method. CONCLUSION: In order to plan for the future, we need to understand the dynamics of education within the context of polarities. Educators need to understand that the choice of DL, although was imposed as a no-alternative solution during the COVID era, yet it has always existed as a possible alternative and will continue to exist after this era. The value of polarity mapping and leveraging allows us to maximize the benefit of each method and guide educators' decisions to minimize the downsides for the good of the learning process.


Assuntos
Competência Clínica , Infecções por Coronavirus/prevenção & controle , Educação a Distância/métodos , Educação a Distância/estatística & dados numéricos , Pandemias/prevenção & controle , Pneumonia Viral/prevenção & controle , COVID-19 , Controle de Doenças Transmissíveis/organização & administração , Estudos Transversais , Currículo , Educação de Graduação em Medicina/organização & administração , Feminino , Humanos , Masculino , Inovação Organizacional , Pandemias/estatística & dados numéricos , Pesquisa Qualitativa , Faculdades de Medicina/organização & administração , Estudantes de Medicina/psicologia
9.
MedEdPublish (2016) ; 9: 71, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-38058899

RESUMO

This article was migrated. The article was marked as recommended. Background and aim of the study: Proper online students'/teacher communication and awareness of the use of Blackboard as an online learning community could result in the improvement of student academic achievement. So, the aim of the current project was directed to encourage students and faculty for using Blackboard as an online learning community tool. Moreover, it aimed to measures their perceptions. Subjects and Methods: The study was directed to the second year Medical students during teaching of Clinical Biochemistry. We started by pre-implementation survey, followed by orientation workshop, engaging students for Blackboard implementation then ended in post-implementation survey to evaluate how come students are engaged and satisfied. Results: The first questionnaire group indicated the students' perceptions of Blackboard use and usefulness as an online learning community tool. The second questionnaire group was related to the Interest & Enjoyment of using Backboard. While Blackboard Tools are presented in the third questionnaire questions group. The comparison regarding the total perception of the three groups of the questionnaire between pre-implementation versus post-implementation survey results showed significant improvement of students' perception in the post-implementation phase. By correlating grades in Clinical Biochemistry and total GPA to the questionnaire groups, total perceptions showed a non-significant correlation between all studied parameters in the pre-implementation phase while significant positive correlations were detected in the post-implementation phase. Conclusion: Based on the presented second-year medical students' perception and satisfaction, we could confirm that the Blackboard online platform is a very successful online line learning community tool. Blackboard together with face to face classroom-based learning methods helps students for better learning achievement. Moreover, the online learning community is considered a complementary tool to that of classroom-based learning as it facilitates students/students and students'/faculty communication and minimizes the time required for physical contacts.

10.
J Microsc Ultrastruct ; 8(4): 211-212, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33623750

RESUMO

The threat associated with physical interaction in teaching and learning timed with the COVID-19 pandemic has rendered faculty in a situation that they were not entirely prepared for. This paper describes a case study where educational videos were used in short format to help faculty progress in their adaptation to virtual teaching. The initiative describes the adaptations done to the videos and making them ore accessible to faculty. The channel experienced a 300% increase in viewership. There is an inherent need for training on using virtual classroom tools and adapting teaching strategies to these virtual tools. Using 5-7 minute videos proved useful in this area.

11.
J Microsc Ultrastruct ; 8(4): 213-215, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33623751

RESUMO

BACKGROUND: The 2019-2020 coronavirus pandemic has affected educational systems worldwide, leading to widespread closures of schools and universities and social distancing. Hence, the shift to an online tool was required. AIMS AND OBJECTIVES: The main problem postulated is the lack of student-teacher interaction that occurs with online learning. METHODS: The Blackboard Collaborate Ultra platform was used to deliver lectures on clinical biochemistry and the reproductive module to our students. Our main goal was to achieve students' engagement and interaction. RESULTS: There were 189 male students enrolled in the reproductive module. The attendance rate was 93%-95%. The download of the recording was 100%. The active participation rate was up to 87%. Hence, Blackboard Collaborate Ultra's virtual classrooms are very useful tools for online interactive lecturing. CONCLUSION: Based on this experience gained, we could conclude that interactive virtual classroom lecturing can be used in addition to or instead of traditional lectures during ordinary situations as a successful online learning community tool.

12.
J Microsc Ultrastruct ; 7(1): 44-49, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31008055

RESUMO

BACKGROUND AND AIM OF THE WORK: The current study postulated that cyclosporine A (CSA) could induce gender-specific renal damage. Hence, the current study aims to investigate the nephrotoxic effect of perinatal exposure of male and female rat progeny to CSA. Moreover, it aims to evaluate the oxidative stress and inflammation as a possible pathophysiologic mechanism. MATERIALS AND METHODS: Female rats were randomly allocated to two groups of four and assigned to undergo either CSA (15 mg/kg/day; the 6th day after conception and continuing until the progeny were weaned) or vehicle treatment as control groups. At the age of 6 weeks, the progeny were divided into the following four groups: male progeny of control-group mothers (M-vehicle, 7); male progeny of CSA-treated mothers (M-CSA, 9); female progeny of control-group mothers (F-vehicle, 7); and female progeny of CSA-treated mothers (F-CSA, 6). Serum adiponectin, tumor necrosis factor-α (TNF-α) and creatinine, creatinine clearance, and urinary 8-isoprostane were measured. Histopathological examination by hematoxylin and eosin stain of Kidney was carried out. RESULTS: Proteinuria and decreased creatinine clearance are significant in M-CSA than M-vehicle and F-CSA. 8-isoprostane is lower in F-CSA than F-vehicle. Increased TNF-α and decreased adiponectin levels in M-CSA than M-vehicle were observed. No significant differences were found in female rat groups. CONCLUSION: From the current study, it could be concluded that CSA could induce renal inflammation as well as oxidative stress that may explain the impaired renal function. The sex difference was a prominent finding in their vulnerability to CSA effects.

13.
J Bone Metab ; 25(3): 165-173, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-30237996

RESUMO

BACKGROUND: Many oral presentations of osteoporosis-a bone metabolic disease-were recorded. Thus, we aimed to assess panoramic radiomorphometric indices with bone mineral density (BMD) values among Saudi postmenopausal women and its importance in the prediction of osteoporosis. METHODS: A total of 431 Saudi women were enrolled in this study. Panoramic radiographs were obtained at the time of BMD measurement. Subjects were fatherly classified into; normal BMD, osteopenia, and osteoporosis groups. Serum follicle-stimulating hormone, luteinizing hormone (LH), estradiol (E2), 25-hydroxy-vitamin D (25[OH]D) and intact-parathyroid hormone were measured. Moreover, serum creatinine, calcium, and phosphate, together with serum osteocalcin (s-OC), procollagen type I N-terminal propeptide (s-PINP) and cross-linked C-terminal telopeptide of type 1 collagen (s-CTX) were measured. Receiver-operator curve (ROC) curve analysis for use of mandibular cortical width (MCW), panoramic mandibular index (PMI), and maxillary-mandibular ratio (M/M ratio) to differentiate women with osteoporosis or osteopenia from normal subjects was calculated. Cut off values of 4.6 at T score <-1 and 4.1 at T score ≤-2.5 were used. RESULTS: Body mass index is significantly low in the osteoporotic group. There is no significant difference in serum levels of LH, E2, calcium, phosphate, and 25(OH)D between the studied groups. Moreover, s-OC, C-terminal propeptide of procollagen type I, s-PINP, s-CTX, and urinary-CTX are significantly higher in osteoporosis than normal and osteopenia groups. ROC curve analysis revealed that MCW and PMI showed significant data while M/M ratio is non-significant. CONCLUSIONS: It could be concluded that MCW as an important panoramic radiographic parameter can be used for prediction and diagnosis of osteoporosis in postmenopausal Saudi women with low BMD.

14.
Med Teach ; 40(sup1): S104-S113, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-29909725

RESUMO

BACKGROUND: Medical education has a longstanding tradition of using logbooks to record activities. The portfolio is an alternative tool to document competence and promote reflective practice. This study assessed the acceptance of portfolio use among Saudi undergraduate medical students. METHODS: Portfolios were introduced in the 2nd through 5th years at King Abdulaziz University over a two-year period (2013-2015). At the end of each academic year, students completed a mixed questionnaire that included a self-assessment of skills learned through the use of portfolio. RESULTS: The results showed a difference in focus between basic and clinical years: in basic years students' focus was on acquiring practical skills, but in clinical years they focused more on acquiring complex skills, including identifying and managing problems. The questionnaire responses nonetheless revealed a positive trend in acceptance (belief in the educational value) of portfolios among students and their mentors, across the years of the program. CONCLUSIONS: Using portfolios as a developmental learning and formative assessment tool in the early undergraduate years was found to contribute to students' ability to create their own clinical skills guidelines in later years, as well as to engage in and appreciate reflective learning.


Assuntos
Atitude do Pessoal de Saúde , Competência Clínica/normas , Educação de Graduação em Medicina/métodos , Avaliação Educacional/métodos , Estudantes de Medicina/estatística & dados numéricos , Humanos , Faculdades de Medicina , Autoavaliação (Psicologia) , Inquéritos e Questionários
15.
Asian Pac J Cancer Prev ; 19(3): 811-817, 2018 Mar 27.
Artigo em Inglês | MEDLINE | ID: mdl-29582639

RESUMO

Background: Hepatocellular carcinoma (HCC) is a common and dangerous malignancy in many parts of the world, and especially in Egypt. Early diagnosis is the most important step in successful HCC management. However most cases are detected at late stage making effective intervention impossible. Aim: The aim of this study was to evaluate the potential of Glypican-3 (GPC-3) to aid in diagnosis of HCC, especially in patients with low serum alpha-fetoprotein (AFP). Subjects and methods: Serum GPC-3 was assessed by flow-cytometry and serum AFP by enzyme-linked immunosorbent assay (ELISA) in 40 HCC patients with AFP< 400ug\l. (GI), 40 HCC patients with AFP> 400ug\l. (GII) and 20 healthy controls (GIII). Results: GPC-3 was found to be significantly elevated in HCC as compared to healthy subjects (GI 38.2±22. 5, GII 50.2±22.6, and GIII 2.24±1.19), with sensitivities of 85% for GI and 84% for GII and specificities of 95% for GI and 92% for GII. AFP showed respective sensitivities of 50% and 79%, and specificities of 80% and 90%, for HCC diagnosis. The combination of GPC-3 with AFP achieved the highest sensitivity (98.5%) and specificity (97.8%). Conclusion: Serum GPC-3 has a better sensitivity than AFP for the diagnosis of HCC. Combination of two markers appears warranted for greatest accuracy.


Assuntos
Biomarcadores Tumorais/sangue , Carcinoma Hepatocelular/diagnóstico , Glipicanas/sangue , Neoplasias Hepáticas/diagnóstico , alfa-Fetoproteínas/análise , Adulto , Carcinoma Hepatocelular/sangue , Estudos de Casos e Controles , Feminino , Seguimentos , Humanos , Neoplasias Hepáticas/sangue , Masculino , Pessoa de Meia-Idade , Prognóstico , Curva ROC
16.
Diabetol Metab Syndr ; 8: 76, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27891185

RESUMO

BACKGROUND: This is the first study to investigate spermatozoal cell death-inducing DNA fragmentation factor-α-like effector A (CIDEA) gene expression and DNA fragmentations in the spermatozoa of men diagnosed with metabolic syndrome (MS) who have normal seminograms with unexplained infertility, and to correlate these parameters with seminal glucose concentration. METHODS: This study included 120 participants: 75 male subjects with MS (38 fertile and 37 infertile), and a control group of 45 fertile males without MS. HOMA-IR, semen analysis, and biochemical measurement of seminal plasma insulin and glucose levels were carried out. Spermatozoal insulin gene and CIDEA gene expressions were performed by the RT-PCR method. The percentage of spermatozoal DNA fragmentation was also estimated. RESULTS: The spermatozoal insulin and CIDEA gene expression, as well as the DNA fragmentation, were significantly higher in the infertile MS group than in the fertile MS group, and significantly higher in both the MS groups than in the control group. Seminal glucose concentration showed significant positive correlations with seminal insulin level, spermatozoa insulin, CIDEA gene expression, and DNA fragmentation. Moreover, there was a positive correlation between spermatozoa CIDEA gene expression and DNA fragmentation. CONCLUSIONS: It can be concluded that MS may affect male fertility at the molecular level, through its possible inducing effect of spermatozoa CIDEA and insulin gene expression, DNA fragmentation, and increased seminal glucose.

17.
J Cancer Educ ; 31(4): 784-788, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-26611278

RESUMO

Breast cancer (BC) accounts for 24 % of all women cancer cases diagnosed in Saudi Arabia each year. Awareness is extremely important in combating this disease. This study was undertaken to assess male high school students' response to BC. This cross-sectional survey was performed on male high school students across schools in Jeddah. A questionnaire gathered data on respondent demographics, beliefs about BC, BC risk factors, early screening methods, and role of men in BC. Statistical analysis was done using SPSS 20. A total of 824 students participated, with an average age of 17.0 years. There was more than 50 % agreement that early detection of BC enhances the chances of recovery, that BC is treatable, and that clinical breast examination and breastfeeding provide protection from BC. Around half the survey population thought that BC was fatal and contagious. Fewer than 50 % thought that BC was inherited and related to smoking, consumption of contraceptive pills, repeated exposure to radiation, obesity, and wearing a bra and that breast tumors were all malignant and spread to different parts of the body. Others knew that mammograms should be performed periodically. A high percentage persuaded their relatives to have mammograms and provided them with psychological support. Knowledge of BC among male high school students in Saudi Arabia is still limited, and, therefore, programs and activities need to be established to increase awareness among high school students.


Assuntos
Neoplasias da Mama/diagnóstico , Conhecimentos, Atitudes e Prática em Saúde , Estudantes/psicologia , Adolescente , Adulto , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/psicologia , Estudos Transversais , Feminino , Humanos , Masculino , Arábia Saudita/epidemiologia , Instituições Acadêmicas , Inquéritos e Questionários , Adulto Jovem
18.
J Microsc Ultrastruct ; 4(3): 115-122, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-30023217

RESUMO

Nutrition has a predominant and recognizable role in health management. Nutrigenetics is the science that identifies and characterizes gene variants associated with differential response to nutrients and relating this variation to variable disease states especially cancer. This arises from the epidemiological fact that cancer accounts for a high proportion of total morbidity and mortality in adults throughout the world. There is much evidence to support that genetic factors play a key role in the development of cancer; these genetic factors such as DNA instability and gene alterations are affected by nutrition. Nutrition may also lead to aberrant DNA methylation, which in turn contributes to carcinogenesis. The aim of this work is to clarify the basic knowledge about the vital role of nutrition-related genes in various disease states, especially cancer, and to identify nutrigenetics as a new concept that could highlight the relation between nutrition and gene expression. This may help to understand the mechanism and pathogenesis of cancer. The cause of cancer is a complex interplay mechanism of genetic and environmental factors. Dietary nutrient intake is an essential environmental factor and there is a marked variation in cancer development with the same dietary intake between individuals. This could be explained by the variation in their genetic polymorphisms, which leads to emergence of the concept of nutrigenomics and nutrigenetics.

19.
J Trace Elem Med Biol ; 27(4): 267-72, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23669311

RESUMO

A highly sensitive and selective technique for the speciation of platinum by cloud point extraction prior to determination by graphite furnace atomic absorption spectrometry (GFAAS) was described. The separation of Pt(II) from Pt(IV) was performed in the presence of 4-(p-chlorophenyl)-1-(pyridin-2-yl)thiosemicarbazide (HCPTS) as chelating agent and Triton X-114 as a non-ionic surfactant. The extraction of Pt(II)-HCPTS complex needs temperature higher than the cloud point temperature of Triton X-114 and pH = 7, while Pt(IV) remains in the aqueous phase. The Pt(II) in the surfactant phase was analyzed by GFAAS, and the concentration of Pt(IV) was calculated by subtraction of Pt(II) from total platinum which was directly determined by GFAAS. The effect of pH, concentration of chelating agent, surfactant, and equilibration temperature were investigated. An enrichment factor of 42 was obtained for the preconcentration of Pt(II) with 50 mL solution. Under the optimum experimental conditions, the calibration curve was linear up to 30 µgL(-1) with detection limit of 0.08 µgL(-1) and the relative standard deviation was 1.8%. No considerable interference was observed due to the presence of coexisting anions and cations. The accuracy of the results was verified by analyzing different spiked samples (tap water, blood plasma and urine). The proposed method was applied to the speciation analysis of Pt in blood plasma and urine with satisfactory results.


Assuntos
Fracionamento Químico/métodos , Grafite/química , Micelas , Platina/sangue , Platina/urina , Espectrofotometria Atômica , Quelantes/química , Humanos , Concentração de Íons de Hidrogênio , Ligantes , Metanol/química , Octoxinol , Concentração Osmolar , Polietilenoglicóis/química , Temperatura , Fatores de Tempo
20.
Med Teach ; 35 Suppl 1: S15-9, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23581891

RESUMO

Assessment, which entails the systematic evaluation of student learning, is an integral part of any educational process. Computer-based assessment (CBA) techniques provide a valuable resource to students seeking to evaluate their academic progress through instantaneous, personalized feedback. CBA reduces examination, grading and reviewing workloads and facilitates training. This paper describes a six step approach for developing CBA in higher education and evaluates student perceptions of computer-based summative assessment at the College of Medicine, King Abdulaziz University. A set of questionnaires were distributed to 341 third year medical students (161 female and 180 male) immediately after examinations in order to assess the adequacy of the system for the exam program. The respondents expressed high satisfaction with the first Saudi experience of CBA for final examinations. However, about 50% of them preferred the use of a pilot CBA before its formal application; hence, many did not recommend its use for future examinations. Both male and female respondents reported that the range of advantages offered by CBA outweighed any disadvantages. Further studies are required to monitor the extended employment of CBA technology for larger classes and for a variety of subjects at universities.


Assuntos
Educação de Graduação em Medicina , Interface Usuário-Computador , Retroalimentação , Feminino , Humanos , Masculino , Desenvolvimento de Programas/métodos , Estudantes de Medicina/psicologia , Inquéritos e Questionários , Adulto Jovem
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