Publications by authors named "Khayat A"

Acute lymphoblastic leukemia (ALL) is an aggressive neoplasm derived from B and/or T cell lineage (B-ALL; T-ALL). For the first time, this study describes, cytogenetically, the karyotypic alterations in adults with ALL in the northern region of Brazil and their relationship with hematological and biochemical characteristics. Through banding analyses, immunophenotyping, as well as hematological and biochemical examination data obtained directly from patients' records, we found that chromosome 21 aneuploidy was the most frequent.

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The search for bioactive compounds for the treatment of several diseases has led to the study of endophytic fungi. Neoplastic diseases are among the most significant health concerns due to their high mortality rate, and there is a dearth of efficacious pharmaceutical agents for the treatment of cancer. Gastric cancer is one of the most aggressive forms of cancer and is among those with the highest mortality rates in Brazil.

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  • IQOS is a heated tobacco product promoted as a safer alternative to traditional cigarettes and has received FDA approval for its reduced exposure claims.
  • A study of 84 interviews revealed varied perceptions about IQOS's advertising claims, with many participants interpreting claims of reduced exposure and risk differently and questioning the credibility of the studies backing those claims.
  • The findings suggest a need for regulators and researchers to closely monitor how harm reduction messages are conveyed to prevent misunderstandings among consumers.
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  • SARS-CoV-2 infection severity may be influenced by genetic factors, particularly through the role of platelets and coagulation markers in severe COVID-19 cases.
  • A study of 43 unvaccinated hospitalized COVID-19 patients found significantly higher expression of the platelet-activating factor receptor (PTAFR) and platelet factor 4 (PF4) compared to healthy individuals.
  • The findings suggest that hyperexpression of these genes could serve as important biomarkers for assessing the risk of complications in COVID-19 patients, aiding in personalized treatment approaches.
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Organogels are semi-solid pharmaceutical forms whose dispersing phase is an organic liquid, for example, an oil, such as acai oil, immobilized by a three-dimensional network formed by the gelling agent. Organogels are being highlighted as innovative release systems for cosmetic active ingredients such as hyaluronic acid for topical applications. Acai oil was evaluated for its physicochemical parameters, fatty acid composition, lipid quality index, spectroscopic pattern (Attenuated total reflectance Fourier Transform Infrared Spectroscopy), thermal behavior, total phenolic, total flavonoids, and total carotenoids and β-carotene content.

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For bioactivity studies, it is necessary to use products with a high degree of purity, which may influence the cytotoxic effects. Supercritical technology presents itself as an alternative to obtain these products. Therefore, the objective of this work was to obtain the bioactive compounds of oil and pulp of açaí fat-free supercritical technology and evaluate the cytotoxicity of products in MRC-5 and VERO cells in vitro.

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Background/aim: Although the reciprocal translocation t(9;22)(q34;q11) is a hallmark of chronic myeloid leukemia (CML), it is also present in acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML). Depending on the gene's breakpoint, it is possible to obtain three isoforms, among which p190 stands out for the poor prognosis it induces whenever it appears. Due to the genomic instability induced by BCR::ABL1, it is proposed to expand the applicability of poly-ADP-ribose polymerase-1 (PARP1) and its inhibitors in hematological neoplasms.

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  • Philip Morris International's IQOS, the top heated tobacco product globally, has a higher usage rate among Arabs compared to Jews in Israel, prompting a study to analyze marketing strategies and regulatory compliance in both communities.
  • The research integrated data from surveys and audits of IQOS retailers in different neighborhoods, comparing marketing practices post the implementation of a points-of-sale display ban in January 2020.
  • Findings revealed that while most marketing strategies were similar, Arab neighborhood retailers had higher rates of being invited to promotional events and reported more direct communication with Philip Morris representatives; audits also suggested that these Arab points-of-sale showed better compliance with the display ban regulations.
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Background The COVID-19 pandemic has significantly influenced public perceptions and behaviors related to vaccination. Understanding parental attitudes, knowledge gaps, and vaccination practices post-pandemic is crucial for informing effective public health strategies. This study aimed to investigate parental attitudes, knowledge, and practices toward routine childhood vaccination in the post-COVID-19 era, emphasizing shifts in perspectives and implications for vaccination strategies.

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  • Philip Morris International's IQOS, a popular heated tobacco product, was analyzed in the context of its presence in Israel, revealing higher usage among the Arab population compared to Jews.
  • The study reviewed articles from January to October 2020, finding that media targeting Arab and Ultra-orthodox Jewish communities portrayed PMI and IQOS more positively than articles aimed at the general public.
  • Specifically, Arab media focused on IQOS' retail locations and social benefits, suggesting a need for monitoring and regulating media content, particularly for minority audiences.
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Background/aim: Acute myeloid leukemia (AML) is a myeloproliferative neoplasm marked by abnormal clonal expansion of hematopoietic progenitor cells, displaying karyotypic aberrations and genetic mutations as prognostic indicators. The World Health Organization (WHO) and the European LeukemiaNet guidelines categorize BCR::ABL1 p190+ AML as high risk. This study explored the identification of the increased incidence of BCR::ABL1 p190+ in our AML population.

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  • Spinal muscular atrophy (SMA) is a serious genetic disorder with limited treatment options, and its prevalence needs more research in Arab countries due to high rates of consanguinity.* -
  • A study involved diagnosing SMA in 171 patients and newborn screenings in 1,502 Emirati infants, revealing a carrier frequency of 1.3% and an incidence of 1 in 7,122 live births for the disease in the UAE.* -
  • Results indicate that implementing premarital genetic screening could significantly reduce SMA cases and save healthcare costs, highlighting the need for wider screening practices in Arab populations.*
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  • Tobacco companies, particularly those selling IQOS in Israel, showed low compliance with display bans, but adhered more closely to plain packaging and advertisement restrictions.
  • After the implementation of these regulations, there was a notable rise in internal advertisements for IQOS, many of which avoided explicit brand naming but used generic signs instead.
  • The study suggests that while some regulations are effective, there is a need for more detailed legislation and enforcement strategies to ensure compliance and prevent marketing circumvention.
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Cervical Cancer (CC) is one of the most prevalent neoplasms among women, considered the leading cause of gynecological death worldwide, and the fourth most common type of cancer. Regional metastasis is closely related to the low effectiveness of treatment, and validating biomarkers can optimize accuracy in diagnosis and prognosis. Among the potential biomarkers associated with disease metastasis are circular RNAs (circRNAs), whose altered expression has been linked to CC progression.

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Background/aim: The relevance of cytogenetic markers as prognostic risk factors has been demonstrated in a vast number of studies, with many prognostication tools utilizing these factors to determine treatment approaches. Patients aged above 60 years represent an important subgroup of acute myeloid leukemia (AML) patients, especially because they usually exhibit a poorer cytogenetic landscape and are less suitable for intensive treatments. The importance of evaluating prognostic parameters in AML, especially in low-income countries, prompted an investigation into CD38 expression and its effects.

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  • AI-generated imagery, especially for congenital heart diseases (CHD), has potential for enhancing medical education but faces significant accuracy issues.
  • The study used DALL·E 3 to create 110 images, including normal and CHD-heart representations, which were evaluated by 33 healthcare professionals for accuracy and educational value.
  • Findings showed that 80.8% of images were anatomically incorrect, 85.2% had incorrect text labels, and 78.1% were deemed unhelpful for medical training, highlighting the need for careful validation of AI-generated content.
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Background: Acute Lymphoblastic Leukemia (ALL) is a neoplasm of the hematopoietic system characterized by a clonal expansion of abnormal lymphocyte precursor cells. ALL is the most common form of cancer in children, but despite advances in treatment, it can still be fatal. Ethnic differences influence survival rates, and genomic ancestry plays an important role, especially in mixed-race populations such as Latin America.

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The main goal of the present study was to analyze the expression profile of cyclin D1 in patients with PC, and to determine possible correlations with clinical and histopathological features. A survey was conducted with 100 patients diagnosed with PC, who were treated at two reference hospitals in São Luís, Maranhão, Brazil, between 2013 and 2017. A review of clinical, epidemiological, and histopathological data was performed, Human Papillomavírus (HPV) DNA was detected using polymerase chain reaction (PCR) and cyclin D1 expression analysis was performed using immunohistochemical techniques.

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  • * Findings showed that non-users found HTPs less appealing, while current users (mostly also cigarette or e-cigarette users) reported greater appeal, particularly among those who use both cigarettes and e-cigarettes.
  • * Perceptions varied on the benefits of IQOS over traditional cigarettes and e-cigarettes, with research indicating that marketing targets young people and those seeking alternatives, highlighting the need for ongoing regulation and monitoring.
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  • This study explores how different sources, such as media and social connections, impact awareness and usage of heated tobacco products (HTPs) among adults in the US and Israel.
  • The research found that exposure to advertisements and non-advertising content through digital platforms and social settings significantly influences both current use and intentions to use HTPs.
  • Results indicate that greater interaction with media and having acquaintances who use HTPs are linked to increased awareness, usage, and intentions to use these products; no major differences were noted between the two countries.
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  • Heated tobacco products (HTPs), like IQOS, are seen as stylish alternatives to traditional cigarettes and e-cigarettes, but their reception among new users needs more exploration.
  • A study analyzed data from 1914 adults in the U.S. and Israel to understand how people perceive HTPs compared to other smoking products and how these perceptions influence their willingness to try HTPs.
  • Results showed that positive views on HTPs' design and health benefits make individuals more likely to try them and recommend them to friends who smoke, highlighting the importance of monitoring public perceptions of these products.
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Artificial intelligence (AI) chatbots, such as ChatGPT, have widely invaded all domains of human life. They have the potential to transform healthcare future. However, their effective implementation hinges on healthcare workers' (HCWs) adoption and perceptions.

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Background: Awareness about obesity, its complications, and an age-appropriate, healthy, active lifestyle are essential to maintaining a healthy life. This study aimed to determine the level of awareness Saudi Arabian caregivers have regarding obesity and regular physical activity.

Materials And Methods: In this cross-sectional study, a survey was conducted among parents in Saudi Arabia using a structured questionnaire.

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The selection of proper reference genes is critical for accurate gene expression analysis in all fields of biological and medical research, mainly because there are many distinctions between different tissues and specimens. Given this variability, even in known classic reference genes, demands of a comprehensive analysis platform is needed to identify the most suitable genes for each study. For this purpose, we present an analysis tool for assisting in decision-making in the analysis of reverse transcription-quantitative polymerase chain reaction (RT-qPCR) data.

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Background: Acetaminophen overdose is a common clinical condition, often leading to liver toxicity. Current treatments involve the three-infusion N-Acetylcysteine (NAC) regimen (FDA-labeled), which may be complex, time-consuming, and need to be changed. An alternative uses two infusions instead, which offers possible advantages regarding simplicity and administration errors.

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