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1.
BMC Med Ethics ; 23(1): 83, 2022 08 14.
Artigo em Inglês | MEDLINE | ID: mdl-35965314

RESUMO

BACKGROUND: Biobanks have recently been established in several low- and middle-income countries (LMICs) in the Arab region of the Middle East. We aimed to explore the views of biobank managers regarding the challenges, ethical issues, and governance arrangements of their biobanks. METHODS: In-depth semi-structured qualitative interviews were conducted with a purposive sample of eight biobank managers from Egypt (6), Jordan (1), and Sudan (1). Interviews were performed either face-to-face, by phone, or via Zoom and lasted approximately 45-75 min. After verbal consent, interviews were recorded and then transcribed. The authors performed a thematic analysis of the transcripts independently and then integrated the themes via a consensus process. RESULTS: Biobank managers discussed the main challenges in establishing their biobanks. These included the staff's lack of experience and training, limited funds, deficit awareness of biobanks, obtaining funding from different sources. Only four reported they were active in distributing biospecimens and health data to researchers. Six biobanks used a broad consent model, one used tiered consent, and another allowed participants to opt-out of being recontacted. Five managers avoided partnerships with pharmaceutical companies due to concerns with unfavorable reactions from the community. Five managers did not have clear policies for returning research results to the donors. Five expressed challenges with sample and data sharing with international collaborators; all five used material transfer agreements. The biobank managers revealed variable governance arrangements and activities with community involving awareness and educational efforts rather than active engagement. Several expressed the importance of transparency with the operations of their biobanks and gaining the trust of their stakeholders. CONCLUSION: Managers of biobanks in LMICs in the Arab Middle East encounter financial, operational, and social challenges toward their sustainability efforts. Discussions with key stakeholders are warranted to manage ethical issues involving informed consent, privacy, data sharing, and the return of results. We recommend that biobank managers in the Arab Middle East form collaborative networks within the region and internationally, develop trusting governance relationships with their stakeholders, and pursue engagement activities with their communities to enhance trust.


Assuntos
Bancos de Espécimes Biológicos , Países em Desenvolvimento , Árabes , Humanos , Consentimento Livre e Esclarecido , Pesquisa Qualitativa
2.
BMC Med Ethics ; 23(1): 122, 2022 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-36457067

RESUMO

Population-based genomics studies have proven successful in identifying genetic variants associated with diseases. High-quality biospecimens linked with informative health data from diverse segments of the population have made such research possible. However, the success of biobank research depends on the willingness of the public to participate in this type of research. We aimed to explore the factors associated with the willingness of the public to participate in biobank research from four low- and middle-income countries in the Arab region (Egypt, Jordan, Morocco, and Sudan). We used a previously validated questionnaire to assess several constructs that included the public's perceptions, attitudes, and willingness to participate in biobank research. We recruited 967 participants. More than half did not have prior awareness of biobanks. Participants' willingness to donate biospecimens and health data was less than 10%. Our results also showed that participants harbored concerns with trust, privacy, and with data-sharing involving international researchers. Predictors of willingness to participate in biobank research included no previous involvement in research and positive attitudes toward biobanks. Finally, our study showed several differences between the four countries regarding several of the investigated constructs. We conclude there should be additional efforts to raise public awareness and enhance perceptions of the public in biobanking research to enhance trust. We further recommend qualitative research to explore the underlying factors that contribute to the public's concerns with international data sharing that would enhance global health.


Assuntos
Árabes , Bancos de Espécimes Biológicos , Humanos , Países em Desenvolvimento , Renda , Confiança
3.
Endocr Res ; 47(2): 64-79, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35168462

RESUMO

BACKGROUND: Epithelial-mesenchymal transition (EMT) of tumor cells is a prerequisite to cancer cell invasion and metastasis. This process involves a network of molecular alterations. Androgen receptor (AR) plays an important role in the biology of breast cancers, particularly those dependent on AR expression like luminal AR (LAR) breast cancer subtype. We have recently reported that the AR agonist, dihydrotestosterone (DHT), induces a mesenchymal transition of MDA-MB-453 cells, concomitant with transcriptional up-regulation of Slug and regulator of G protein signaling 2 (RGS2). OBJECTIVE: The role of Slug and RGS2 in mediating the DHT-induced effects in these cells was investigated. METHODS: MDA-MB-453 cells were used as a model system of LAR breast cancer. Immunofluorescence was used to examine cell morphology and protein localization. Protein expression was analyzed by immunoblotting. Protein localization was confirmed by cell fractionation followed by immunoblotting. Protein-protein interaction was confirmed by co-immunoprecipitation followed by immunoblotting. Transwell membranes were used to assess cell migration. Transfection of cells with siRNA molecules that target Slug and RGS2 mRNA was utilized to delineate the modes of action of these two molecules. RESULTS: Treatment of MDA-MB-453 cells with DHT induced the expression of both proteins. In addition, AR-Slug, AR-RGS2, and Slug-RGS2 interactions were observed shortly after AR activation. Knocking down Slug abrogated the basal, but not the DHT-induced, cell migration and blocked DHT-induced mesenchymal transition. On the other hand, RGS2 knocked-down cells had an increased level of Slug protein and assumed mesenchymal cell morphology with induced migration, and the addition of DHT further elongated cell morphology and stimulated their migration. Inhibition of AR or ß-catenin reverted the RGS2 knocked-down cells to the epithelial phenotype, but only inhibition of AR blocked their DHT-induced migration. CONCLUSIONS: These results suggest the involvement of RGS2 and Slug in a complex molecular network regulating the DHT-induced mesenchymal features in MDA-MB-453 cells. The study may offer a better understanding of the biological role of AR in breast cancer toward devising AR-based therapeutic strategies.


Assuntos
Neoplasias da Mama , Proteínas RGS , Androgênios/farmacologia , Neoplasias da Mama/patologia , Linhagem Celular Tumoral , Di-Hidrotestosterona/farmacologia , Transição Epitelial-Mesenquimal/fisiologia , Feminino , Humanos , Fatores de Transcrição da Família Snail
4.
BMC Med Ethics ; 22(1): 152, 2021 11 13.
Artigo em Inglês | MEDLINE | ID: mdl-34774033

RESUMO

BACKGROUND: Biobanks are considered primary means+ of supporting contemporary research, in order to deliver personalized and precise diagnostics with public acceptance and participation as a cornerstone for their success. AIMS: This study aims to assess knowledge, perception, and attitudes towards biomedical research and biobanking among students at the University of Jordan. METHODOLOGY: An online questionnaire was designed, developed, and piloted. It was divided into 5 sections that included questions related to issues of biomedical research and biobanking as well as factors influencing the decision to participate. RESULTS: Responses from 435 students revealed that 52.9% previously heard of biobanks. There was an overwhelming acceptance for participation in biomedical, genetic, and biobanking research. A blood sample was the most preferred for donation. Protection of privacy, informed consent prior to donation, approval of an ethics committee, and trust towards researchers were the most important factors associated with willingness to participate. On the other hand, the vagueness of the type of research performed on the biospecimens and the unavailability of general research results to the donor had a negative connotation. There was no clear agreement on the type of informed consent preferred by students, but to be contacted and informed of research results was preferred by the majority. Students also preferred the disposal of biospecimens and information when deciding to withdraw from participation. CONCLUSION: There is strong enthusiasm among students to participate in biomedical research and biobanking with all rights reserved thus providing hope for a very promising future in Jordan.


Assuntos
Bancos de Espécimes Biológicos , Pesquisa Biomédica , Humanos , Consentimento Livre e Esclarecido , Jordânia , Estudantes , Universidades
5.
Endocr Res ; 46(3): 114-128, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33703980

RESUMO

Purpose The cellular and molecular dynamics of DHT-induced EMT in MDA-MB-453 cells were investigated.Methods:PCR arrays were used to examine the expression of EMT-regulatory genes. Immunoblotting was used to detect protein levels and confirm protein-protein interaction following immunoprecipitation. Immunofluorescence was used to observe rearrangement of the actin cytoskeleton and cell morphology. Cell migration was assessed by transwell assayResults: Change of cell morphology was concomitant with increased cell migration after treating cells with DHT. Exposure of cells to DHT for one hour was sufficient to induce changes in cell morphology and actin cytoskeleton after 72 hours indicating altered gene expression. A long-term lasting nuclear translocation of AR was observed after a short exposure of cells to DHT. Investigating the expression of 84 EMT-related genes revealed down-expression of ß-catenin, N-cadherin, and TCF-4 and increased expression of Slug, all of which were confirmed at the protein level. Yet, not only early interaction of AR and ß-catenin was observed following AR activation, inhibition of ß-catenin blocked DHT-induced mesenchymal transition and migration. Wnt signaling was found to be partially important in DHT-induced morphological alteration. The mesenchymal transition of cells could be induced by treating cells with an inhibitor of glycogen synthase kinase-3ß, an enzyme that inhibits ß-catenin; this morphological transition could be reversed by antagonizing AR suggesting that AR functions downstream of ß-catenin.Conclusions: These results suggest that MDA-MB-453 cells undergo partial EMT induced by DHT, ß-catenin is critical for this phenotypic change, and AR probably reciprocally mediates the mesenchymal transition of these cells upon activation of GSK-3 ß.


Assuntos
Neoplasias da Mama/metabolismo , Di-Hidrotestosterona/metabolismo , Transição Epitelial-Mesenquimal/fisiologia , Glicogênio Sintase Quinase 3 beta/metabolismo , Receptores Androgênicos/metabolismo , beta Catenina/metabolismo , Linhagem Celular Tumoral , Humanos
6.
Ann Diagn Pathol ; 39: 53-58, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30718223

RESUMO

The transmembrane receptor NOTCH1 is thought to be associated with the development and progression of T-acute lymphoblastic leukemia (T-ALL)/T-lymphoblastic lymphoma (T-LBL) and chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL). The current study aimed to characterize NOTCH1 expression and elucidate the variants in the functional PEST domain of the receptor in T-ALL/LBL and CLL/SLL. The nuclear expression of NOTCH1 protein was detected in 25% and 5% of cases of T-ALL/LBL and CLL/SLL, respectively, whereas cytoplasmic expression was detected in 33.3% and 15% cases, respectively. The frequency of variants in T-ALL/LBL was 33%, whereas 40% of CLL/SLL cases possessed variants. Four novel variants were identified; three of which were non-synonymous and one common variant c.7280_7280delG between T-ALL/LBL and CLL/SLL cases. The previously described variant, c.7541_7542delCT, was detected in 3 cases of CLL/SLL. These results provide support for the contribution of NOTCH1 in the etiology of these types of cancers.


Assuntos
Variação Genética , Leucemia Linfocítica Crônica de Células B/genética , Leucemia-Linfoma Linfoblástico de Células T Precursoras/genética , Receptor Notch1/genética , Receptor Notch1/metabolismo , Núcleo Celular/metabolismo , Citoplasma/metabolismo , Feminino , Predisposição Genética para Doença , Humanos , Jordânia , Masculino , Domínios Proteicos , Receptor Notch1/química
7.
Endocr Res ; 43(3): 203-214, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29578828

RESUMO

PURPOSE: The androgen receptor (AR) has attracted attention in the treatment of breast cancer. Due to the undesirable side effects of AR agonists, attempts have been undertaken to develop selective AR modulators. One of these compounds is Cl-4AS-1. This study examined this compound more closely at the cellular and molecular levels. METHODS: Three different breast cancer cell lines were utilized, namely the luminal MCF-7 cells, the molecular apocrine MDA-MB-453 cells, and the triple negative, basal MDA-MB-231 cells. RESULTS: High and significant concordance between dihydrotestosterone (DHT) and Cl-4AS-1 in regulation of gene expression in MDA-MB-453 cells was found. However, some differences were noted including the expression of AR, which was upregulated by DHT, but not Cl-4AS-1. In addition, both DHT and Cl-4AS-1 caused a similar morphological change and reorganization of the actin structure of MDA-MB-453 cells into a mesenchymal phenotype. Treatment of cells with DHT resulted in induction of proliferation of MCF-7 and MDA-MB-453 cells, but no effect was observed on the growth of MDA-MB-231 cells. On the other hand, increasing doses of Cl-4AS-1 resulted in a dose-dependent inhibition on the growth of the three cell lines. This inhibition was a result of induction of apoptosis whereby Cl-4AS-1 caused a block in entry of cells into the S-phase followed by DNA degradation. CONCLUSIONS: These results indicate that although Cl-4AS-1 has characteristics of classical AR agonist, it has dissimilar properties that may make it useful in treating breast cancer.


Assuntos
Androgênios/farmacologia , Proliferação de Células/efeitos dos fármacos , Di-Hidrotestosterona/farmacologia , Expressão Gênica/efeitos dos fármacos , Neoplasias da Mama , Linhagem Celular Tumoral , Relação Dose-Resposta a Droga , Humanos
8.
Cell Biol Int ; 41(12): 1345-1355, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28816390

RESUMO

MicroRNA molecules (miRNAs) play important roles in regulating cell behavior. The expression of certain miRNAs has been shown to be regulated by the androgen receptor (AR), which seems to have a critical role in the tumorigenic process of breast cancer. The differential expression of 84 miRNAs was first examined in three breast cancer cell lines: the luminal MCF-7 and T47D cells and the molecular apocrine MDA-MB-453 cells. Analysis of basal expression of miRNAs revealed that each cell line had distinct miRNA expression where let-7a and -7b were markers of MDA-MB-453 cells, whereas miR-205 was a marker for the luminal cell lines. Treating the cells with the AR agonist, CI-4AS-1, resulted in unique alterations in the expression of specific miRNA among the three cell lines. Particularly, the expression of miR-100 and miR-125 was reduced in MDA-MB-453 cells by five and three folds, respectively. This effect was simultaneous with AR-induced increase in the expression and extracellular release of metalloprotease-13 (MMP13). Transfection of cells with either miR-100 or miR-125b negated the induction of MMP13 release. Additionally, AR activation induced a morphological alteration of MDA-MB-453 cells, which was blocked by miR-125b only. Collectively, these data indicate that AR may control the biological behavior of breast cancer cells and protein expression via miRNAs.


Assuntos
Neoplasias da Mama/metabolismo , Metaloproteinase 13 da Matriz/metabolismo , MicroRNAs/biossíntese , Receptores Androgênicos/metabolismo , Neoplasias da Mama/enzimologia , Neoplasias da Mama/genética , Linhagem Celular Tumoral , Feminino , Humanos , Células MCF-7 , Metaloproteinase 13 da Matriz/genética , MicroRNAs/administração & dosagem , MicroRNAs/genética , MicroRNAs/metabolismo , Receptores Androgênicos/genética , Transdução de Sinais/genética , Transfecção
9.
J Pak Med Assoc ; 67(8): 1206-1212, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28839305

RESUMO

OBJECTIVE: To analyse breast cancer cases with respect to age, menopausal status, hormone receptors and human epidermal growth factor receptor 2 expression, in addition to nodal and distant metastases. METHODS: This retrospective study was conducted at Jordan University Hospital, Amman, Jordan, and comprised cases of breast carcinoma among females between 2006 and 2015. Clinicopathological data was collected from patient files and laboratory reports. Data was analysed using SPSS v 17. RESULTS: Of the 752 cases, 559(74.3%) were invasive ductal carcinomas of non-specific type, followed by 36(4.8%) cases of invasive lobular carcinoma. Upon investigating the clinicopathological data on the breast cancer cases, 466(61.97%) cases had sufficient information for further analysis. Of them, 414(61.97%) patients were aged above 40 years and 190(40.77%) were post-menopausal. Moreover, 221(47.42%) cases showed lymph node metastases, but only 32(6.87%) had distant metastases. The expression of oestrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2 was found to be positive in 343(73.6%), 299(66.7%) and 97 (24.6%) cases, respectively. Besides, 42(9.01%) cases were triple negative, which were diagnosed only in females below 40 years age. CONCLUSIONS: These results were in concordance with international reports, except for the association of triple negative breast cancer with age where it was mainly diagnosed among females younger than 40 years age.


Assuntos
Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/patologia , Carcinoma Lobular/patologia , Linfonodos/patologia , Adulto , Distribuição por Idade , Fatores Etários , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/metabolismo , Carcinoma Ductal de Mama/epidemiologia , Carcinoma Ductal de Mama/metabolismo , Carcinoma Lobular/epidemiologia , Carcinoma Lobular/metabolismo , Feminino , Humanos , Jordânia/epidemiologia , Pessoa de Meia-Idade , Gradação de Tumores , Metástase Neoplásica , Pós-Menopausa , Pré-Menopausa , Prevalência , Prognóstico , Receptor ErbB-2/metabolismo , Receptores de Estrogênio/metabolismo , Receptores de Progesterona/metabolismo , Estudos Retrospectivos , Centros de Atenção Terciária , Neoplasias de Mama Triplo Negativas , Carga Tumoral
10.
Med Princ Pract ; 25(4): 323-8, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27165114

RESUMO

OBJECTIVES: To study the willingness of dental patients to donate biospecimens for research purpose and to examine factors that may influence such a decision. MATERIALS AND METHODS: A face-to-face interview was conducted using a pretested structured survey instrument on 408 adult dental patients attending a university hospital for dental care. Descriptive statistics were generated, and the x03C7;2 test was used to examine differences between groups. p values ≤0.5 were considered statistically significant. RESULTS: Of the 408 participants, only 71 (17.4%) had heard of the terms biobanking/biospecimens, but 293 (71.9%) approved of the idea of using biospecimens for biomedical research, and 228 (55.9%) were willing to donate biospecimens and give personal information for research purposes. In participants who were unwilling to participate in biobanking, fear of information leakage was the most frequently reported reason, while in participants who were willing to donate biospecimens, the potential to provide more effective and less costly treatments was the most frequently reported reason. The preferences of the 228 participants who were willing to donate biospecimens were as follows: give a sample of removed oral tissues including extracted teeth (n = 105, 46.1%), donate a blood sample (n = 52, 23%), donate a sample of saliva (n = 43, 18.6%), and give a urine sample (n = 28, 12.3%). CONCLUSION: Dental patients had a generally positive attitude towards biomedical research and biobanking. The most preferred types of biospecimens to donate in a dental setting were removed tissues, including extracted teeth and blood samples.


Assuntos
Bancos de Espécimes Biológicos , Pesquisa Biomédica , Unidade Hospitalar de Odontologia , Conhecimentos, Atitudes e Prática em Saúde , Pacientes/psicologia , Obtenção de Tecidos e Órgãos , Confidencialidade , Feminino , Hospitais Universitários , Humanos , Entrevistas como Assunto , Jordânia , Masculino
11.
J Genet Couns ; 24(6): 1001-10, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25851945

RESUMO

Genetic testing has a potential in the prevention of genetic diseases, particularly in communities with high rates of consanguineous marriage. Therefore, knowledge, practice, and attitudes of the public in Jordan regarding genetic testing were investigated. Individuals (N = 3,196) were questioned about the concepts of genetic testing and genetic counselors, if they underwent any genetic tests, the type of test, the method of consenting to the test, as well as their level of satisfaction with the privacy of the genetic testing service. The likelihood of pursuing predictive genetic testing for cancer was also investigated. Although almost 70 % of respondents knew the term "genetic testing," only 18 % had undergone genetic testing, primarily the mandatory premarital test. In addition, there was a lack of general knowledge about genetic counselors. Many of those who had genetic testing (45 %) indicated they did not go through a consent process, and a lack of consent was significantly related to dissatisfaction with the privacy of the service. Approximately 55 % of respondents indicated they would potentially pursue predictive genetic testing for cancer. Going for routine health checkups was not significantly correlated with either actual or potential uptake of genetic testing, suggesting health care providers do not play an influential role in patients' testing decisions. Our results show a gap between the knowledge and uptake of genetic testing and may help to guide the design of effective strategies to initiate successful genetic counseling and testing services.


Assuntos
Consanguinidade , Aconselhamento Genético/psicologia , Testes Genéticos/estatística & dados numéricos , Neoplasias/psicologia , Adulto , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Pessoal de Saúde , Humanos , Jordânia , Masculino , Neoplasias/genética , Satisfação do Paciente , Percepção Social , Adulto Jovem
12.
Health Care Women Int ; 36(5): 578-92, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-24911030

RESUMO

Enhancing breast cancer screening in developing countries is pivotal in improving women's health. We aimed at describing knowledge of and perceived reasons for performing breast cancer screening. We interviewed 1,549 population-based randomly selected women. We found that women share limited knowledge about breast cancer screening. Few women performed screening for early detection purposes. The influence of physicians was the main reason for performing mammography. Prevalence of breast cancer screening might be enhanced by integrating screening into other medical services. Health agencies need to invite women for screening and educate them regarding the importance of screening in the absence of symptoms.


Assuntos
Detecção Precoce de Câncer/estatística & dados numéricos , Conhecimentos, Atitudes e Prática em Saúde , Mamografia/estatística & dados numéricos , Programas de Rastreamento/estatística & dados numéricos , Aceitação pelo Paciente de Cuidados de Saúde/etnologia , Adolescente , Adulto , Idoso , Feminino , Humanos , Entrevistas como Assunto , Jordânia , Pessoa de Meia-Idade , Aceitação pelo Paciente de Cuidados de Saúde/psicologia , Percepção , Vigilância da População , Prevalência , Inquéritos e Questionários , Adulto Jovem
13.
Int J Neurosci ; 124(11): 812-7, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24456262

RESUMO

Genome-wide association studies (GWAS) have been a promising approach in unraveling genetic associations to multiple sclerosis (MS), a complex, multifactorial disease. Biobanks are repositories of patient biospecimens and information that can promote GWAS research. However, the success of GWAS and biobanking is dependent on the level of participation of MS patients in genetic research. In order to initiate MS-based biobanking and GWAS research in Jordan, the willingness of MS patients to participate in long-term, genetic research in Jordan and their preferred type of a consent form were investigated. MS patients (289) were recruited for genetic studies. Personal and clinical information were collected from those who enrolled in the study. Approximately 96% of MS patients agreed to participate in genetic studies. The female:male ratio among patients was 2:1 with most patients being diagnosed with relapsing-remitting MS (88%). The mean age of onset was 28.3 years, the mean duration of illness was 6 years, and the mean Expanded Disability Status Scale was 2.8. Relatedness of parents was significantly associated with having secondary-progressive MS. Approximately 85% of the patients preferred open consent with 37% of them preferring to renew their consent. All the patients approved to be recontacted and update their information via accessing their medical files or physicians. These observations support the establishment of a specialized MS biobank in Jordan and pave the way to participate in international large-scale genetic initiatives.


Assuntos
Bancos de Espécimes Biológicos , Estudo de Associação Genômica Ampla , Esclerose Múltipla/genética , Participação do Paciente , Preferência do Paciente , Adolescente , Adulto , Termos de Consentimento , Feminino , Humanos , Jordânia , Masculino , Pessoa de Meia-Idade , Esclerose Múltipla/diagnóstico , Esclerose Múltipla/psicologia , Adulto Jovem
14.
Int J Nurs Pract ; 20(6): 608-15, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24118581

RESUMO

Understanding of public health/cancer information-seeking behaviour could play key role in promoting health behaviour and reducing cancer burden. In the current study, data from 'Knowledge, Attitudes and Practices toward Cancer Prevention and Care Survey in Jordan' were used. A total of 3196 participants (18 years and older) were included in the study. The results indicated that 82% (n = 2609) of the participants had never looked for health/cancer information from any sources. The majority of those surveyed (97%) reported watching TV habitually, whereby 948 participants (26%) indicated that they watched health information on the local/satellite TV channels, whereas 1603 (45%) reported doing so on non-local/satellite TV channels. Internet was the most searched source for information (36%); however, it is one of least preferred sources. Health-care providers are the most preferred source for cancer-related information, followed by TV and someone with cancer. The majority of participants (82%; n = 489) indicated the absence of barriers in seeking information about cancer. The results suggest that although the Jordanian public use of different media and channels for seeking health/cancer-related information, health-care providers and TV might be effective tools for health education. In addition, joint efforts must be established to initiate awareness programmes at the local and regional levels.


Assuntos
Conhecimentos, Atitudes e Prática em Saúde , Comportamento de Busca de Informação , Neoplasias/prevenção & controle , Neoplasias/terapia , Adolescente , Adulto , Feminino , Humanos , Jordânia , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Adulto Jovem
15.
Cancers (Basel) ; 16(3)2024 Feb 04.
Artigo em Inglês | MEDLINE | ID: mdl-38339416

RESUMO

It is crucial to identify novel molecular biomarkers and therapeutic targets for triple-negative breast cancer (TNBC). The androgen receptor (AR) is a regulator of TNBC, acting partially via microRNA molecules (miRNAs). In this study, we used PCR arrays to profile the expression of 84 miRNAs in 24 TNBC tissue samples, which were equally classified according to AR expression and/or metastasis. Several bioinformatics tools were then utilized to determine the potentially affected protein targets and signaling pathways. Seven miRNAs were found to be significantly more highly expressed in association with AR expression, including miR-328-3p and miR-489-3p. Increased expression of miR-205-3p was found to be significantly associated with metastasis. Certain miRNAs were specifically found to be differentially expressed in either metastatic or non-metastatic AR-positive tumors. A gene ontology (GO) analysis indicated biological roles in the regulation of transcription, cellular response to DNA damage, and the transforming growth factor-beta (TGF-beta) signaling pathway. The GO analysis also showed enrichment in kinase and transcription factor activities. The TGF-beta and a number of kinase-dependent pathways were also retrieved using the Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses. This study offers an understanding of the role of AR in TNBC and further implicates miRNAs in mediating the effects of AR on TNBC.

16.
J Int Med Res ; 52(3): 3000605241239034, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38546260

RESUMO

OBJECTIVES: Mycosis fungoides (MF) is the most common cutaneous T-cell lymphoma; it arises from tissue-resident memory T-cells (TRM). In the present study, we investigated potential functional genetic variations that may predispose MF development. METHODS: A case-control study was conducted using whole-exome sequencing, with a focus on genes that are essential to TRM function. RESULTS: We included 21 patients and 19 healthy subjects in the study. Single nucleotide polymorphisms in the following genes were significantly more common in patients than in healthy subjects: GZMB, HLA-DRB1, CD103, and NOTCH1. Moreover, the number of patients carrying single nucleotide polymorphisms in LAG3, NR4A2, and CD26L was significantly greater in the patient group than in the control group. CONCLUSIONS: The presence of genetic variations in one or more TRM functional gene may predispose patients to develop MF. Further studies involving a larger patient population and a comparative analysis of protein expression will be necessary to validate these findings.


Assuntos
Micose Fungoide , Neoplasias Cutâneas , Humanos , Estudos de Casos e Controles , Neoplasias Cutâneas/genética , Neoplasias Cutâneas/patologia , Células T de Memória , Micose Fungoide/genética , Micose Fungoide/patologia , Predisposição Genética para Doença , Polimorfismo de Nucleotídeo Único/genética
17.
Biopreserv Biobank ; 22(2): 98-109, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36951637

RESUMO

Background: The recent expansion of genomic biobank research in the Arab region in the Middle East North Africa has raised complex ethical and regulatory issues. However, there is a lack of studies regarding the views of Arab researchers involved in such research. We aimed to assess the perceptions and attitudes of Arab researchers regarding these issues in biobank research. Methods: We developed a questionnaire to assess the perceptions and attitudes regarding genetic research of researchers from Egypt, Sudan, Morocco, and Jordan. The questionnaire requested demographic data, perceptions, and attitudes regarding the collection, storage, and use of biospecimens and data, the use of broad consent, data security, data sharing, and community engagement. We used multiple linear regressions to identify predictors of perceptions and attitudes. Results: We recruited 383 researchers. Researchers favored equally the use of broad and tiered consent (44.1% and 39.1%, respectively). Most respondents agreed with the importance of confidentiality protections to ensure data security (91.8%). However, lower percentages were seen regarding the importance of community engagement (64.5%), data sharing with national colleagues and international partners (60.9% and 41.1%, respectively), and biospecimen sharing with national colleagues and international partners (59.9% and 36.2%, respectively). Investigators were evenly split on whether the return of individual research results should depend on the availability or not of a medical intervention that can be offered to address the genetic anomaly (47.5% and 46.4%, respectively). Predictors of attitudes toward biospecimen research included serving on Research Ethics Committees, prior research ethics training, and affiliation with nonacademic institutions. Conclusions: We recommend further exploratory research with researchers regarding the importance of community engagement and to address their concerns about data sharing, with researchers within and outside their countries.


Assuntos
Bancos de Espécimes Biológicos , Pesquisa Biomédica , Humanos , Árabes/genética , Confidencialidade , Atitude , Inquéritos e Questionários , Consentimento Livre e Esclarecido
18.
Nat Genet ; 32 Suppl: 509-14, 2002 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-12454646

RESUMO

Measurement of gene-expression profiles using microarray technology is becoming increasingly popular among the biomedical research community. Although there has been great progress in this field, investigators are still confronted with a difficult question after completing their experiments: how to validate the large data sets that are generated? This review summarizes current approaches to verifying global expression results, discusses the caveats that must be considered, and describes some methods that are being developed to address outstanding problems.


Assuntos
Perfilação da Expressão Gênica/normas , Análise de Sequência com Séries de Oligonucleotídeos/normas , Animais , DNA Complementar/genética , Previsões , Perfilação da Expressão Gênica/métodos , Humanos , Análise de Sequência com Séries de Oligonucleotídeos/métodos , Proteínas/genética , Controle de Qualidade , RNA Mensageiro/genética , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
19.
Methods Protoc ; 6(3)2023 May 26.
Artigo em Inglês | MEDLINE | ID: mdl-37367998

RESUMO

BACKGROUND: Vascular smooth muscle cells (VSMCs) and vascular endothelial cells are key participants in the pathogenesis of atherosclerosis. Human umbilical vein endothelial cells (HUVECs) and VSMCs are useful models to design therapeutic strategies for many cardiovascular diseases (CVDs). However, procuring a VSMC cell line by researchers, to model atherosclerosis, for example, is impeded by time and cost limitations, as well as by many other logistic problems in many countries. RESULTS: This article describes a protocol for the quick and cheap isolation of VSMCs from human umbilical cords using a mechanical and enzymatic method. This VSMC protocol yields a confluent primary culture that could be obtained within 10 days and sub-cultured for 8-10 passages. The isolated cells are characterized by their morphology and the expression of mRNA of marker proteins analyzed by reverse transcription polymerase chain reaction (RT-qPCR). CONCLUSION: The protocol described herein for the isolation of VSMCs from human umbilical cords is easy and is time- and cost-efficient. Isolated cells are useful models for understanding the mechanisms underlying many pathophysiological conditions.

20.
J Empir Res Hum Res Ethics ; 18(1-2): 13-23, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36617966

RESUMO

The emergence of the COVID-19 pandemic has necessitated broad public participation in clinical trials. Knowledge of the attitudes of the relatively young would provide a perspective on future representative public enrollment in clinical trials. This study investigated the attitudes of undergraduate university students toward participation in COVID-19 clinical trials and determined the predictors of their attitudes. Using a validated, web-based questionnaire, 61.2% of the 425 respondents had heard about clinical trials before. Web-based media were the main sources of this knowledge. Less than 20% expressed willingness to participate in COVID-19 clinical trials or support the participation of a family member. The predictors were personal and family protection from the disease. On the contrary, being a female, possible political exploitation of the vaccine or drug, and their potential inefficacy were predictors of unwillingness to participate. This study may inform different stakeholders in developing effective study recruitment strategies to combat current and emerging pathogens.


Assuntos
COVID-19 , Pandemias , Feminino , Humanos , Conhecimentos, Atitudes e Prática em Saúde , Jordânia , Estudantes , Inquéritos e Questionários , Ensaios Clínicos como Assunto
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