Ahmed J Aldhafiri

Dr. Ahmed J Aldhafiri

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Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 June 2024 in Pharmacy
Verified
Journal Article
Open access
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AAAli Dhaifallah Alalawi
Ali Dhaifallah Alalawi
EAEnas Albalawi
Enas Albalawi
AAAbdullah Aljohani
Abdullah Aljohani
AAAbdullah Almutairi
Abdullah Almutairi
AAAbdulraouf Alrehili
Abdulraouf Alrehili
AAAhmed J Aldhafiri
Ahmed J Aldhafiri
Agranulocytosis represents a severe complication associated with the administration of clozapine. Clozapine is an antipsychotic medication that has demonstrated substantial efficacy in remediating refractory schizophrenia and various other psychiatric disorders. Nonetheless, it is crucial to monitor patients for neutropenia regularly during clozapine therapy. Therefore, this article aimed to delve into the prevalence of agranulocytosis during clozapine treatment by scrutinizing the extant literature to discern trends and correlations. This review endeavored to explore factors such as drug interactions, dose-related factors, duration of treatment, and genetic predispositions that could potentially influence the likelihood of patients developing agranulocytosis while undergoing clozapine therapy. Moreover, this review enunciates the ramifications of agranulocytosis on both patients and healthcare providers and meticulously evaluates the strategies to mitigate this risk and ensure optimal patient outcomes.

16 January 2025 in Pharmaceuticals
Verified
Journal Article
Open access
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MAMohannad A Almikhlafi
Mohannad A Almikhlafi
NANehad Amin
Nehad Amin
AKAakash Kumar
Aakash Kumar
TSTarun Sharma
Tarun Sharma
ZKZuber Khan
Zuber Khan
HEHossein Elbadawy
Hossein Elbadawy
Background: Traumatic brain injury (TBI) is a leading cause of mortality worldwide and often results in substantial cognitive, motor, and psychological impairments, triggering oxidative stress, neuroinflammation, and neurodegeneration. This study examined the neuroprotective effects of azithromycin (AZI) in TBI. Methods: TBI was induced in rats using the weight-drop method. Subsequently, rats received a daily intraperitoneal (I.P.) dose of AZI (150 mg/kg) for 28 days. Behavioral tests (Morris water maze, rotarod, and open field tests) were performed to assess cognitive and motor functions. Neurochemical analyses included oxidative stress markers (GSH, SOD, MDA, catalase), inflammatory cytokines (TNF-α, IL-1β), apoptotic markers (caspase-3, Bax, Bcl-2), mitochondrial complexes (complex I, II, III, IV, and V), and the transforming growth factor- beta (TGF-β) as a neurofilament marker. Histological evaluations focused on neuronal integrity in the cortex, hippocampus, and striatum. Results: Treatment with AZI significantly facilitated motor and cognitive function recovery in TBI-affected rats. At the molecular level, AZI effectively reduced oxidative stress markers, ameliorated neuroinflammation by decreasing TNF-α, IL-1β, and neuronal apoptosis, and differentially modulated mitochondrial complexes. Histological assessments revealed enhanced neuronal integrity and fewer pathological changes in AZI-treated rats compared to untreated TBI controls. Conclusions: AZI was shown to interfere with several pathways involved in TBI’s pathophysiology. While preclinical results are promising, further studies are necessary to establish the long-term safety and efficacy of AZI in a clinical setting. This research supports the potential re-purposing of AZI as a novel treatment strategy for TBI and related neurodegenerative disorders.

11 September 2023 in Clocks & Sleep
Verified
Journal Article
Open access
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AAAhmed J Aldhafiri
Ahmed J Aldhafiri
NANawaf Almutairi
Nawaf Almutairi
MAMohammed Alharbi
Mohammed Alharbi
AAAbdullah Aloufi
Abdullah Aloufi
AHAbdulaziz Hakeem
Abdulaziz Hakeem
FAFahad Mohammed Alzahrani
Fahad Mohammed Alzahrani
A negative attitude toward sleep has greatly affected sleep habits. In addition to contributing to physical and metabolic disorders, poor sleep quality may cause emotional disturbances. This study aimed to measure sleep behavior and factors contributing to poor sleep quality in the Madinah region, Saudi Arabia. We also assessed whether the use of sleeping aids improved peoples sleep. Three hundred and ninety-nine adults in the Madinah region of Saudi Arabia participated in this cross-sectional study. Three data domains were collected using an online questionnaire between 30 January and 26 April 2022. In the first domain, the characteristics of participants were discussed. In the second domain, questions about sleep behavior were asked. In the third domain, we examined the types, frequency, and impact of sleep aid use. Out of the 399 participants, 154 (38.59%) reported sleep problems. A total of 64.94% of the 154 participants blamed stress as the leading cause of their sleep disorders, and 74.68% of those with sleep problems reported reduced productivity. Among those who reported having sleep problems, 46.10% used sleep aids, with Panadol night (antihistamine) being the most used, 49.30%, followed by Melatonin at 39.44%. Sleep quality improved by 67.6% among those who used sleep aids. A total of 71.8% of the participants think it is not safe to use sleep aids in the long term. Our findings suggest that sleep problems are a prevalent concern in Madinah, Saudi Arabia, and even though the use of sleep aids improved sleep quality, it should be considered an emerging and important public health objective in Saudi Arabia. Further studies are needed to evaluate sleep quality and the level of sleep aid usage among other Saudi Arabian regions.

1 January 2021 in Journal of Pharmaceutical Research International
Verified
Journal Article
Closed access
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NANasser S. AlHaddad
Nasser S. AlHaddad
AAAbdul Rahman A. Alshaeri
Abdul Rahman A. Alshaeri
AFAthar A. Faidh
Athar A. Faidh
YAYaser M. Alahmadi
Yaser M. Alahmadi
HEHossein M. Elbadawy
Hossein M. Elbadawy
AAAhmed J Aldhafiri
Ahmed J Aldhafiri
Aim: To assess the knowledge, attitude and practice of healthcare professionals regarding the anaphylaxis in Medina, Saudi Arabia. Settings and Design: This was a population-based epidemiological study using a survey composed of 20 questions about the causes, symptoms, and treatment of anaphylaxis. Methods: This survey was distributed to healthcare professionals who represented different job categories including consultants, specialists, interns, residents, nurses, and medical students. Statistical Analysis Used: One-way ANOVA is used to compare the knowledge score across different job categories. SPSS V26 software was used for the analysis and a p value of <0.05 was considered significant. Results: The mean of the correct answers for all participants was 60% and no difference in the mean scores was found in all participant from different job categories. The minimum achieved score was 30% and the maximum score was 100%. The score for the correct answers to each question was varied from 21% to 81%. Conclusions: The shortage of knowledge among the healthcare professionals regarding anaphylaxis predicts the occurrence of undesirable outcomes for patients. Educating healthcare professionals regarding the management of anaphylaxis can improve the quality of healthcare services.

17 December 2024 in Life
Verified
Journal Article
Open access
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HEHeba M. Eltahir
Heba M. Eltahir
ASAbdel-Gawad S. Shalkami
Abdel-Gawad S. Shalkami
ASAhmed M. Shehata
Ahmed M. Shehata
MAMohannad A Almikhlafi
Mohannad A Almikhlafi
AAAhmed J Aldhafiri
Ahmed J Aldhafiri
MAMekky Abouzied
Mekky Abouzied
Background and aim: Being a central organ in homeostasis and maintaining the health of the biological system, kidneys are exposed to variable toxicants. Long-term exposure to nephrotoxic molecules causes chronic renal damage that causes fibrosis and loss of function. Such damage can be initiated by oxidative stress which provokes inflammation. We aim at investigating the potential therapeutic effects of Boswellia serrata (BS) gum resin extract in managing CCl4-induced renal toxicity. Methods: Male Wistar albino rats were assigned to groups: healthy control; CCl4-treated (CCl4, twice/week, for 6 weeks); CCl4 + BS-treated: CCl4 for 6 weeks followed by BS (150 mg/kg/day) for 2 weeks; and CCl4 + Silymarin-treated: CCl4 for 6 weeks followed by Silymarin (100 mg/kg/day) for 2 weeks. Blood and kidney tissue were utilized to assess oxidative stress status, inflammatory cytokines, and histopathological changes. Results: BS treatment ameliorated signs of renal damage and fibrosis as it improved renal antioxidant status and renal function markers and significantly reduced the levels of inflammatory cytokines TNF-α, IL-1β, IL-6, and IL-8 along with the fibrogenic marker TGF-β. Kidney tissues showed improved histological features after BS treatment. Conclusions: BS gum resin extract has significant therapeutic potential against CCl4-induced renal damage and fibrosis. These effects could be mediated via its previously reported antioxidant, free radical scavenging, and anti-inflammatory effects.

Verified
Journal Article
Open access
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AAAhmed Khalaf Aljohani
Ahmed Khalaf Aljohani
AAAryam Alharbi
Aryam Alharbi
AAAsalah Alhazmi
Asalah Alhazmi
MHManhal N. Hudhayri
Manhal N. Hudhayri
EAEsraa Belal Almuwalld
Esraa Belal Almuwalld
FAFahd Abdelkarem
Fahd Abdelkarem
Diabetes mellitus represents one of the main health challenges worldwide, characterized by hyperglycemia and long-term serious microvascular and macrovascular complications. Marine organisms are a promising reservoir of bioactive metabolites for developing effective antidiabetic therapies with fewer side effects. The sea urchin Tripneustes gratilla (T. gratilla) is widely distributed in the Red Sea, with limited reports of its pharmacological activities and chemical characterization. In this study, a nanosuspension formulation of T. gratilla extract (T. gratilla-NS) was developed to enhance the bioavailability of its bioactive constituents. This study investigated the antidiabetic potential of T. gratilla extract through an integrated approach encompassing chemical profiling of the extract, assessment of its alcoholic extract for in vitro inhibitory effects on α-amylase and α-glucosidase, and in vivo evaluation of T. gratilla-NS in an alloxan-induced diabetic rat model. We found that the alcoholic extract showed potent inhibitory action toward α-amylase with IC50 5.31 ± 0.05 µg/mL and moderate inhibitory activity toward α-glucosidase with IC50 21.36 ± 0.06 µg/mL. T. gratilla-NS significantly increased insulin levels, reduced blood glucose levels, and restored pancreatic damage. Furthermore, it enhanced the levels of superoxide dismutase and total antioxidant capacity with a concomitant decrease in malondialdehyde concentration in pancreatic tissue. The observed activities could be attributed to a wide array of diverse compounds, terpenes, mainly sesquiterpenes, diterpenes, steroids, and polyunsaturated fatty acids detected by GC-MS, compounds with a phenolic nucleus equal to 54.26 ± 1.27 mg. GAE/g of extract. This research highlights the dual role of T. gratilla-NS in combating diabetes and subsequently attenuating its associated complications.