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"Maarouf, May A."
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14,441 Genomics-Based Validated Automated Comprehensive Clinicopathologic Correlations for Myeloid Neoplasms
by
Sakr, Maha M.
,
Talaat, Ahmed K.
,
Montaser, Yara M.
in
692/699/1541/1990/1673
,
692/699/1541/1990/2331
,
692/699/1541/1990/283/1896
2025
The dataset (Elsafty_Reports_of_Myeloid_Neoplasms_2024) consists of 14,441 comprehensive clinicopathologic correlations (CPCs) for myeloid neoplasms (MN) with corresponding laboratory results. Specialized online platform utilizing these laboratory results automatically generated the diagnostic and prognostic CPCs. These results include complete blood counts (CBC), peripheral blood smear (PBS) findings, blast/promyelocyte count with dysplasia screening by flow cytometry, and molecular results by NGS/PCR. Two Hematopathologists, who performed the CBC and PBS review, collected their 10,794 real-world reports of cases served in Egypt with molecular studies performed in the USA and Europe. These newly-diagnosed cases included 243 chronic myeloid leukemia (CML) cases with 257 mutations/aberrations; 4,567 non-CML MN cases with 7,883 Tiers I/II mutations/aberrations, amino acid changes, and allele frequencies; and 5,984 benign/inconclusive cases with negative NGS for myeloid mutations/aberrations in 66 DNA/RNA genes. Additionally, there are 3,647 CPCs with synthetic genomics simulating all new/follow-up CML cases and complex/rare non-CML MN cases. Stringent validation by 51 international professors/consultants/specialists from multiple medical centres confirmed 100% medical and clerical accuracy, referencing the WHO 5th edition and relevant esteemed publications.
Journal Article
A Critical Review of Medication Adherence in Hypertension: Barriers and Facilitators Clinicians Should Consider
by
Hamrahian, Seyed Mehrdad
,
Maarouf, Omar H
,
Fülöp, Tibor
in
Antihypertensive drugs
,
Antihypertensives
,
Asymptomatic
2022
Hypertension is a global public health problem, and its prevalence is increasing worldwide. Impacting all human societies and socioeconomic strata, it remains the major modifiable risk factor for global burden of cardiovascular disease all-cause mortality and the leading cause of loss of disability-adjusted life years. Despite increased awareness, the rate of blood pressure control remains unsatisfactory, particularly in low- to middle-income countries. Apparent treatment-resistant hypertension is associated with worse adverse health outcomes. It includes both true resistant and pseudo-resistant hypertension, which requires out-of-office blood pressure monitoring to exclude white-coat effect and confirmation of adherence to the agreed recommended antihypertensive therapy. The depth of medication non-adherence remains poorly recognized among medical practitioners, thus presenting an underestimated modifiable risk factor. Medication non-adherence is a complex and multidimensional variable with three quantifiable phases: initiation, implementation, and discontinuation, collectively called persistence. Non-adherence can be both intentional and non-intentional and usually involves several interconnected factors. Persistence declines over time in the treatment of chronic diseases like hypertension. The risk is higher in patients with new diagnosis, poor insurance status, polypharmacy, and multiple comorbidities, particularly psychiatric disorders. The World Health Organization divides the contributing factors impacting adherence into five categories. Screening and detection for medication non-adherence are challenging due to its dynamic nature and potential white-coat effect. Easy-to-conduct screening methods have low reliability and validity, whereas more reliable and valid methods are costly and difficult to perform. Medication non-adherence is associated with poor clinical outcome and potential negative impact on health-care costs. Evaluation of adherence should become an integral part of assessment of patients treated for hypertension. Medication adherence can significantly improve with a patient-centered approach, non-judgmental communication skills, and collaborative multidisciplinary management, including engagement of the patients in their care by self-blood pressure monitoring. Keywords: blood pressure control, cardiovascular disease, hypertension, medication adherence, persistence, resistant hypertension
Journal Article
Impaired hepatic amyloid-beta degradation in Alzheimer’s disease
by
Sue, Lucia I.
,
Dugger, Brittany N.
,
Beach, Thomas G.
in
Aged, 80 and over
,
Aging
,
Alzheimer Disease - metabolism
2018
Extensive research strongly suggests that amyloid beta (Aβ) aggregates in the brain have a central role in Alzheimer's disease (AD) pathogenesis. Pathological Aβ deposition is likely due to an altered balance between overproduction and elimination. Rodent studies have suggested that the liver has a major role in Aβ degradation. It is possible alterations of liver function could affect brain Aβ levels through changes in blood Aβ concentration. In this study, we hypothesized hepatic Aβ degradation to be impaired in AD subjects. To test our hypothesis, an Aβ degradation assay was developed using synthetic fluorescein-labeled Aβ40 and Aβ42 spiked into human liver homogenates. Aβ degradation rates were lower in AD-derived homogenates as compared with those from non-demented (ND) control subjects, even after accounting for such covariates as age, sex, and APOE genotype. The protein expression of potential Aβ-degrading enzymes were also examined. Neprilysin levels were not different in AD liver samples, while cathepsin D and insulin-degrading enzyme were significantly altered in AD subjects. The results support the possibility that impaired hepatic Aβ degradation could be a factor contributing to increased brain Aβ accumulation and AD.
Journal Article
Morphological and Pathological Evolution of the Brain Microcirculation in Aging and Alzheimer’s Disease
by
Kokjohn, Tyler A.
,
Maarouf, Chera L.
,
Hunter, Jesse M.
in
Acetylcholine
,
Advertising executives
,
Aged
2012
Key pathological hallmarks of Alzheimer's disease (AD), including amyloid plaques, cerebral amyloid angiopathy (CAA) and neurofibrillary tangles do not completely account for cognitive impairment, therefore other factors such as cardiovascular and cerebrovascular pathologies, may contribute to AD. In order to elucidate the microvascular changes that contribute to aging and disease, direct neuropathological staining and immunohistochemistry, were used to quantify the structural integrity of the microvasculature and its innervation in three oldest-old cohorts: 1) nonagenarians with AD and a high amyloid plaque load; 2) nonagenarians with no dementia and a high amyloid plaque load; 3) nonagenarians without dementia or amyloid plaques. In addition, a non-demented (ND) group (average age 71 years) with no amyloid plaques was included for comparison. While gray matter thickness and overall brain mass were reduced in AD compared to ND control groups, overall capillary density was not different. However, degenerated string capillaries were elevated in AD, potentially suggesting greater microvascular \"dysfunction\" compared to ND groups. Intriguingly, apolipoprotein ε4 carriers had significantly higher string vessel counts relative to non-ε4 carriers. Taken together, these data suggest a concomitant loss of functional capillaries and brain volume in AD subjects. We also demonstrated a trend of decreasing vesicular acetylcholine transporter staining, a marker of cortical cholinergic afferents that contribute to arteriolar vasoregulation, in AD compared to ND control groups, suggesting impaired control of vasodilation in AD subjects. In addition, tyrosine hydroxylase, a marker of noradrenergic vascular innervation, was reduced which may also contribute to a loss of control of vasoconstriction. The data highlight the importance of the brain microcirculation in the pathogenesis and evolution of AD.
Journal Article
Ethylene, a key factor in the regulation of seed dormancy
by
El-Maarouf-Bouteau, Hayat
,
Corbineau, Françoise
,
Xia, Qiong
in
Abscisic Acid
,
Biosynthesis
,
Dormancy
2014
Ethylene is an important component of the gaseous environment, and regulates numerous plant developmental processes including seed germination and seedling establishment. Dormancy, the inability to germinate in apparently favorable conditions, has been demonstrated to be regulated by the hormonal balance between abscisic acid (ABA) and gibberellins (GAs). Ethylene plays a key role in dormancy release in numerous species, the effective concentrations allowing the germination of dormant seeds ranging between 0.1 and 200 μL L(-1). Studies using inhibitors of ethylene biosynthesis or of ethylene action and analysis of mutant lines altered in genes involved in the ethylene signaling pathway (etr1, ein2, ain1, etr1, and erf1) demonstrate the involvement of ethylene in the regulation of germination and dormancy. Ethylene counteracts ABA effects through a regulation of ABA metabolism and signaling pathways. Moreover, ethylene insensitive mutants in Arabidopsis are more sensitive to ABA and the seeds are more dormant. Numerous data also show an interaction between ABA, GAs and ethylene metabolism and signaling pathways. It has been increasingly demonstrated that reactive oxygen species (ROS) may play a significant role in the regulation of seed germination interacting with hormonal signaling pathways. In the present review the responsiveness of seeds to ethylene will be described, and the key role of ethylene in the regulation of seed dormancy via a crosstalk between hormones and other signals will be discussed.
Journal Article
Worldwide Evaluations of Quinoa: Preliminary Results from Post International Year of Quinoa FAO Projects in Nine Countries
by
Al-Nusairi, Mohammad S.
,
Breidy, Joelle
,
Hassan, Layth
in
Adaptation
,
Agricultural production
,
Agriculture
2016
Chenopodium quinoa Willd., a high quality grain crop, is resistant to abiotic stresses (drought, cold, and salt) and offers an optimal source of protein. Quinoa represents a symbol of crop genetic diversity across the Andean region. In recent years, this crop has undergone a major expansion outside its countries of origin. The activities carried out within the framework of the International Year of Quinoa provided a great contribution to raise awareness on the multiple benefits of quinoa as well as to its wider cultivation at the global level. FAO is actively involved in promoting and evaluating the cultivation of quinoa in 26 countries outside the Andean region with the aim to strengthen food and nutrition security. The main goal of this research is to evaluate the adaptability of selected quinoa genotypes under different environments outside the Andean region. This paper presents the preliminary results from nine countries. Field evaluations were conducted during 2013/2014 and 2014/2015 in Asia (Kyrgyzstan and Tajikistan), and the Near East and North African countries (Algeria, Egypt, Iraq, Iran, Lebanon, Mauritania, and Yemen). In each country, the trials were carried out in different locations that globally represent the diversity of 19 agrarian systems under different agro-ecological conditions. Twenty-one genotypes of quinoa were tested using the same experimental protocol in all locations consisting in a randomized complete block design (RCBD) with three replicates. Some genotypes showed higher yields and the Q18 and Q12 landraces displayed greater adaptation than others to new environmental conditions. The Q21 and Q26 landraces were evaluated with stable and satisfactory levels of yield (>1 t.ha(-1)) in each of the different trial sites. This production stability is of considerable importance especially under climate change uncertainty. While these results suggest that this Andean crop is able to grow in many different environments, social, and cultural considerations remain crucial regarding its possible introduction as a staple food in new cropping systems around the world.
Journal Article
Super-twisting algorithm with time delay estimation for uncertain robot manipulators
by
Kali, Yassine
,
Benjelloun, Khalid
,
Saad, Maarouf
in
Algorithms
,
Automotive Engineering
,
Classical Mechanics
2018
This paper proposes a super-twisting algorithm (STA) with time delay estimation (TDE) for the problem of high-accuracy tracking trajectory of robotic manipulators in the presence of uncertainties and unexpected disturbances. The TDE method is known for it capability to estimate uncertainties simply without an exact knowledge of the system dynamics. Using the estimated uncertainties, the control law is then designed based on STA to ensure robustness, finite-time convergence and chattering reduction. The stability analysis of the closed-loop system and the finite-time convergence are proved using Lyapunov theory. In order to show the effectiveness of the proposed method, simulations and experimental results were carried out on a 2-DOF rigid robot manipulator and on the 7-DOF ANAT robot arm, respectively.
Journal Article
Host Immune Response to Influenza A Virus Infection
by
Chen, Ji-Long
,
Liu, Shasha
,
Goraya, Mohsan Ullah
in
Adaptive immunity
,
Antibodies
,
Antibody-dependent cell-mediated cytotoxicity
2018
Influenza A viruses (IAVs) are contagious pathogens responsible for severe respiratory infection in humans and animals worldwide. Upon detection of IAV infection, host immune system aims to defend against and clear the viral infection. Innate immune system is comprised of physical barriers (mucus and collectins), various phagocytic cells, group of cytokines, interferons (IFNs), and IFN-stimulated genes, which provide first line of defense against IAV infection. The adaptive immunity is mediated by B cells and T cells, characterized with antigen-specific memory cells, capturing and neutralizing the pathogen. The humoral immune response functions through hemagglutinin-specific circulating antibodies to neutralize IAV. In addition, antibodies can bind to the surface of infected cells and induce antibody-dependent cell-mediated cytotoxicity or complement activation. Although there are neutralizing antibodies against the virus, cellular immunity also plays a crucial role in the fight against IAVs. On the other hand, IAVs have developed multiple strategies to escape from host immune surveillance for successful replication. In this review, we discuss how immune system, especially innate immune system and critical molecules are involved in the antiviral defense against IAVs. In addition, we highlight how IAVs antagonize different immune responses to achieve a successful infection.
Journal Article
Controllable subspace for linear time varying systems
2019
The paper aims at providing a description of the controllable subspace for a linear time varying system. This description generalizes the well known fact that this subspace is the range of the Kalman matrix. The general description shows that the controllable subspace is the range of a general matrix involving the transition matrix and a finite number of generalized Kalman matrices. Important known results which give sufficient conditions for controllability of a time varying system become immediate consequences of such a description.
Journal Article
Neuroanatomical background and functional considerations for stereotactic interventions in the H fields of Forel
2018
The H fields of Forel constitute an intricate neuroanatomical structure that occupies a central position within the posterior subthalamus. Anatomically, it features a dense concentration of fiber bundles including corticofugal, pallidothalamic, cerebellothalamic and other projections that connect functionally relevant areas of the brain. Functionally, the fields of Forel are embedded within the cortico-striato-thalamo-cortical circuit and constitute the main link between the striatopallidal system and the thalamocortical network. Given the current understanding of basal ganglia involvement in movement disorders and neuropsychiatric disease we sought to investigate the H fields of Forel as a potential target in stereotactic functional neurosurgery. Although historically recognized in the treatment of movement disorders, behavioral disorders and epilepsy, the significance of the H fields is considerably diminished today receiving only little attention. Owing to the current lack of reviews addressing the anatomical and functional organization of Forel’s fields, we aim to deliver an up-to-date overview of the H fields in this paper. We investigate the complex neuroanatomy and describe the passage of the various fiber systems that course through the posterior subthalamus. We revise the role of Forel’s fields in the current context of our understanding of cortico-basal ganglia circuitry and discuss the historic relevance of Forel’s fields during the lesional era. Finally, we provide an outlook regarding the potential of deep brain stimulation in close proximity and within the H fields of Forel.
Journal Article