Publications by authors named "Mehdi S"

Extracranial arteriovenous malformations (eAVMs) are complex vascular lesions characterized by anomalous arteriovenous connections, vascular instability, and disruptions in endothelial cell (EC)-to-mural cell (MC) interactions. This study sought to determine whether eAVM-MCs could induce endothelial-to-mesenchymal transition (EndMT), a process known to disrupt vascular integrity, in the eAVM microenvironment. eAVM and paired control tissues were analyzed using RT-PCR for EC (, , and ) and EndMT-specific markers (, , , /.

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Ethylene is an important plant hormone whose production relies on the action of key enzymes, one of which is 1-aminocyclopropane-1-carboxylate synthase (ACS). There are three classes of ACS, which are all partially regulated by degradation through the ubiquitin-proteasome system (UPS), which regulates ethylene production. Arabidopsis has a single class III ACS, ACS7, but although it is known to be degraded by the 26S proteasome, the UPS proteins involved are poorly characterised.

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Background: Hernia repairs are one of the most common general surgery procedures and an essential part of training for general surgery residents. The widespread incorporation of robotic hernia repairs warrants the development of a procedure-specific robotic curriculum to assist novice surgeons in improving technical skills.

Objective: To evaluate a robotic hernia simulation-based curriculum for general surgery residents using video review.

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Breast cancer is the most prevalent cancer among women worldwide. Despite significant advancements in breast cancer treatments over the past decade, late recurrence, a hallmark of breast cancer, remains a major challenge for oncologists. In this case report, we present an atypical presentation of late breast cancer recurrence as a peri-bronchial lesion manifesting as dysphagia 14 years after completing treatment for primary breast cancer.

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Introduction: Intraosseous (IO) access is a commonly used procedure in pediatric emergencies for establishingvascular access when alternative means, such as intravenous access, cannot be obtained. Likealternative routes, IO can be administered quickly and provides a route for medications, blood products,and fluids to be infused in emergency circumstances. While the use of IO is generally considered safewith minimal risks, potential complications can include compartment syndrome, infection, thrombosis, and fracture.

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Ocular drugs have low absorption because of the unique environment in the eye, making ocular drugs one of the most challenging pharmaceutical initiatives. Liposomes have shown to be a promising ocular drug delivery system over the years because of enhanced drug absorption, biocompatibility, and biodegradability. Utilising a mucoadhesive material alongside liposomes could be a promising strategy to increase the therapeutic efficacy of ocular drugs.

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Article Synopsis
  • * There is ongoing research exploring how diabetic neuropathy is related to cognitive dysfunction and gut health, though the exact mechanisms are not fully understood.
  • * The review highlights the complex relationship between diabetic neuropathy, cognitive impairment, and the role of an imbalanced gut microbiome in their development and progression.
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Introduction: Enhanced recovery after surgery (ERAS) is a patient-centerd, evidence-based approach to improve postoperative outcomes. The protocol involves multidisciplinary collaboration and standardisation of perioperative interventions. ERAS has shown positive results in reducing hospitalisation and complications.

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Palladium-based catalysts are remarkable in endorsing hydrogen (H) generation through formic acid (HCOOH, FA) dehydrogenation under near-ambient conditions. Hydrogen energy efficiency depends on high-performance catalyst design. In this study, Pd-Cu nanoalloy catalysts with mutable atomic ratios are successfully fabricated on TiO nanosheets (TiO-NSs).

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The fascinating properties and versatile nature of 2D MXenes have generated significant interest in the scientific community. This has led to extensive research on expanding these materials into 1D and 0D forms. This review investigates the synthesis, properties, and applications of 1D MXenes, elucidating their potential across various fields.

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The challenge of targeting RNA with small molecules necessitates a better understanding of RNA-ligand interaction mechanisms. However, the dynamic nature of nucleic acids, their ligand-induced stabilization, and how conformational changes influence gene expression pose significant difficulties for experimental investigation. This work employs a combination of computational and experimental methods to address these challenges.

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  • Diffuse large B cell lymphoma (DLBCL) is a highly aggressive form of non-Hodgkin lymphoma, with about 40% of patients facing treatment-resistant or recurring disease, highlighting the need for better therapies.
  • Researchers developed a new xenograft mouse model using human DLBCL cell lines, which allows for more accurate preclinical studies of the disease.
  • The study found that the human IL6-expressing NSG mice supported significant tumor growth and mirrored the aggressive nature of DLBCL, suggesting their potential as a valuable tool for advancing treatment strategies.
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In recent years, predictive machine learning models have gained prominence across various scientific domains. However, their black-box nature necessitates establishing trust in them before accepting their predictions as accurate. One promising strategy involves employing explanation techniques that elucidate the rationale behind a model's predictions in a way that humans can understand.

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Soft tissue injuries often involve muscle and peripheral nerves and are qualitatively distinct from single-tissue injuries. Prior research suggests that damaged innervation compromises wound healing. To test this in a traumatic injury context, we developed a novel mouse model of nerve and lower limb polytrauma, which features greater pain hypersensitivity and more sustained macrophage infiltration than either injury in isolation.

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Background: One million individuals in the USA die from acute myocardial infarction (MI), which currently affects 3 million people globally. The available data about the early and late outcomes of both biodegradable polymer drug-eluting stents (BP-DES) and durable polymer drug-eluting stents exhibit inconsistency. We performed a meta-analysis comparing the safety and efficacy of BP-DES with DP-DES.

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  • Pakistan's healthcare system requires more trained family physicians to improve primary care quality, prompting the development of a three-month online "Train the Trainers" course.
  • A study was conducted with 31 participants to compare their expectations before the course with their perceptions afterward, utilizing pre- and post-course questionnaires for data collection and analysis.
  • Results indicated that the course successfully met participants' expectations, particularly regarding improvements in teaching skills, but suggested areas for enhancement, such as increased interaction and potential in-person sessions.
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Objective: Social media (SM), with its addictive nature and the accompanying psychosocial challenges such as stress, anxiety, and depression, is the primary factor exacerbating mental health problems and adversely impacting individuals' wellbeing. Our study's goal was to determine how SM affects employees' psychosocial behaviours and assess the various factors that contributed to the employee's excessive use of SM.

Methods: A cross-sectional correlational analysis was conducted.

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Depression is a prevalent global health concern necessitating alternative approaches to conventional antidepressant medications due to its associated adverse effects. Nigella sativa (NS) is recognized for its potential as an antidepressant, offering a promising solution with fewer side effects. This study investigated the antidepressant efficacy of cyclodextrin-complexed lyophilized nanosuspension of NS oleoresin (NSOR) in a murine model of chronic unpredictable mild stress (CUMS)-induced depression.

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Purpose: Infantile colic diagnostic criteria were established by Rome IV. A universally accepted management remains to be established. We aimed to evaluate diagnostic criteria, management strategies, and perceived regional prevalence of infantile colic in Pakistan, as well as its effect on physicians and parents.

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  • General surgery residents need better robotic surgery training due to the lack of a standardized curriculum.
  • Two different training models were tested: an in-unit rotation (IUR) and a 2-week curriculum (2WR), using VR simulation with the da Vinci® Skill Simulator.
  • The data showed that residents in the 2WR model had better completion rates and performance improvements in robotic skills compared to those in IUR, highlighting the effectiveness of the VR curriculum.
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  • Diabetic nephropathy and peripheral neuropathy are serious complications of diabetes, linked to various molecular pathways and specific biomarkers, which contribute to high health risks.
  • A comprehensive review of multiple scientific databases was conducted to explore the roles of these biomarkers and pathways in the diseases' development, with a focus on the effectiveness of two flavonoids, rutin and quercetin.
  • The study found that rutin and quercetin may help combat the adverse effects of diabetes-related complications and recommends further research and clinical trials to explore their therapeutic potential.
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Purpose: The prevalence of urinary stone disease in ESRD is 3.2%, leading to renal damage due to obstructive uropathy, infection, and frequent surgical intervention. PCNL, the gold standard for complex renal stone disease, has evolved with smaller access sheaths (14-20 F), improved optics, and fluoroscopic equipments.

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Chronic dysregulation of peripheral lipids has been found to be associated with depression and cognition, but their interaction has not been investigated. Growing evidence has highlighted the association between peripheral lipoprotein levels with depression and cognition with inconsistent results. We assessed the association between peripheral lipids, depression, and cognition while evaluating their potential interactions using robust clinically relevant predictors such as lipoprotein levels and chronic medical disorders that dysregulate lipoproteins.

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Our laboratory has shown that calpain-2 activation in the brain following acute injury is directly related to neuronal damage and the long-term functional consequences of the injury, while calpain-1 activation is generally neuroprotective and calpain-1 deletion exacerbates neuronal injury. We have also shown that a relatively selective calpain-2 inhibitor, referred to as C2I, enhanced long-term potentiation and learning and memory, and provided neuroprotection in the controlled cortical impact (CCI) model of traumatic brain injury (TBI) in mice. Using molecular dynamic simulation and Site Identification by Ligand Competitive Saturation (SILCS) software, we generated about 130 analogs of C2I and tested them in a number of in vitro and in vivo assays.

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Purpose: Intracardiac transcatheter interventions allow for reducing trauma and hospitalization stays as compared to standard surgery. In the treatment of mitral regurgitation, the most widely adopted transcatheter approach consists in deploying a clip on the mitral valve leaflets by means of a catheter that is run through veins from a peripheral access to the left atrium. However, precise manipulation of the catheter from outside the body while copying with the path constraints imposed by the vessels remains challenging.

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