Publications by authors named "Raja Ahmad"

Article Synopsis
  • The study investigates how psychiatric conditions affect the likelihood of receiving transcatheter aortic valve replacement (TAVR) in hospitalized patients with aortic stenosis (AS).
  • Out of over 1.5 million AS patients analyzed, 26% had psychiatric comorbidities, which significantly decreased their odds of undergoing TAVR.
  • The findings suggest that patients with conditions like depression, anxiety, and bipolar disorder had even lower odds of receiving TAVR, indicating a need for further research to understand and address these disparities.
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The global prevalence of diabetes is escalating, with estimates indicating that over 536.6 million individuals were afflicted by 2021, accounting for approximately 10.5% of the world's population.

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Immune checkpoint inhibitors (ICIs) are now being widely used for the treatment of various malignancies, but they have a distinctive set of side effects due to the overactivation of the immune system, which is important to recognize. Capillary leak syndrome (CLS) is a rare but potentially life-threatening side effect of ICIs that causes a significant increase in the permeability of capillaries, leading to the leakage of plasma-containing proteins from these small vessels. This condition results in several clinical features, including edema, hypotension, hypoalbuminemia, and hemoconcentration.

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MTU1 controls intramitochondrial protein synthesis by catalyzing the 2-thiouridine modification of mitochondrial transfer RNAs (mt-tRNAs). Missense mutations in the MTU1 gene are associated with life-threatening reversible infantile hepatic failure. However, the molecular pathogenesis is not well understood.

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Article Synopsis
  • Most research on platelet-rich plasma (PRP) has focused on autologous (self-derived) sources due to concerns about safety and immune rejection with allogenic (donor-derived) sources.
  • Recent advancements have reignited interest in allogenic PRP, showing it to be safe, effective, and plentiful for cartilage repair.
  • A systematic review identified 12 relevant studies, primarily focusing on animal models, which indicated that allogenic PRP can enhance cell proliferation and cartilage repair, despite some conflicting results.
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  • - Osteoarthritis (OA) is the most common chronic joint disease and leads to significant societal costs, but current treatments don't effectively stop or reverse the damage to cartilage, which is crucial in OA progression.
  • - The loss or malfunction of chondrocytes, which are the cells responsible for maintaining cartilage, is a key factor in cartilage breakdown, and their death through a process called apoptosis contributes to this deterioration.
  • - Autophagy, a cell survival mechanism that helps get rid of damaged components, could be a promising treatment target to prevent chondrocyte apoptosis and slow down OA; however, more research is needed to understand how autophagy and apoptosis are connected in these cells.
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Peripheral nerve injury is one of the common disabling clinical conditions and around 50% of the cases end up in permanent impairment. Due to the lack of effective treatment options regenerative medicine employing stem cells is being evaluated. The presented study evaluated and compared regeneration potential of mesenchymal stem cells (MSCs) derived from bone marrow (BM) and adipose tissue (AD) in acute rabbit sciatic nerve injury (axonotmesis) model.

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The year 2020 has witnessed the emergence of coronavirus (COVID-19) that has rapidly spread and adversely affected the global economy, health, and human lives. The COVID-19 pandemic has exposed the limitations of existing healthcare systems regarding their inadequacy to timely and efficiently handle public health emergencies. A large portion of today's healthcare systems are centralized and fall short in providing necessary information security and privacy, data immutability, transparency, and traceability features to detect fraud related to COVID-19 vaccination certification, and anti-body testing.

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The red palm weevil (RPW), , poses a severe threat to agro-industrial crops, particularly major cultivated palm species. Infestations result in economic losses due to reduced fruit quality and yield. The entomopathogenic fungus, , has shown promise as a potential biocontrol agent against the RPW.

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Article Synopsis
  • - Tendon injuries are common and difficult to treat due to slow healing and poor tissue repair, often resulting in weakened, disorganized tissue.
  • - Mesenchymal stem cell (MSC) therapy shows promise for improving tendon repair, especially when MSCs are exposed to low oxygen (hypoxic) conditions, which boosts their ability to differentiate into tendon cells.
  • - The review explores how hypoxia-inducible factor-1-alpha (HIF-1α) is crucial in this process, particularly its interactions with growth factors like FGF-2 and TGF-β1, and highlights strategies to enhance HIF-1α to improve MSC therapy effectiveness.
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A young female patient in her early 20s of Hispanic descent presented to the hospital with new-onset chest pain and uncontrolled hypertension. She was found to have blood pressure in the 200s/100s. She was evaluated for causes of secondary hypertension and underwent computed tomography angiography (CTA) of her abdomen to rule out fibromuscular dysplasia, which showed abnormal thickening of lower thoracic and abdominal aorta extending into both renal arteries causing stenosis.

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Granulomatosis with polyangiitis (GPA) is a rare, autoimmune, antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis of uncertain etiology. The incidence of autoimmune complications following stem cell transplant is around 2-5%, with autoimmune cytopenia reported most frequently. We present a case of a 65-year-old male patient who presented to the hospital with productive cough, dyspnea, and fever for five months after haploidentical stem cell transplantation.

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Urinothorax is a rare cause of pleural effusion, which is seen in patients with obstructive uropathy, blunt trauma, or ureteric injury during abdominal surgical procedures. Clinical symptoms may include dyspnea, chest pain, cough, fever, abdominal pain, and decreased urine output. Diagnosis is made by thoracentesis, which would reveal fluid with a urine-like odor, and pleural fluid analysis, which would show if fluid is transudative in nature with a pH lower than 7.

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Deep learning has gained huge traction in recent years because of its potential to make informed decisions. A large portion of today's deep learning systems are based on centralized servers and fall short in providing operational transparency, traceability, reliability, security, and trusted data provenance features. Also, training deep learning models by utilizing centralized data is vulnerable to the single point of failure problem.

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The year 2020 has witnessed unprecedented levels of demand for COVID-19 medical equipment and supplies. However, most of today's systems, methods, and technologies leveraged for handling the forward supply chain of COVID-19 medical equipment and the waste that results from them after usage are inefficient. They fall short in providing traceability, reliability, operational transparency, security, and trust features.

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Introduction: Despite the common occurrence of streptokinase-induced hypotension among patients with acute myocardial infarction, the underlying pathophysiology remains obscure and poorly understood. Our study aimed to pool clinical evidence on the potential mechanism of streptokinase-induced hypotension through a systematic review of the literature.

Material And Methods: We conducted literature search from Medline, Scopus and Web of Science on clinical studies related to streptokinase-induced hypotension.

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In this paper, Jr.NiFeO nanoparticles (NPs) were synthesized first time using the leaves extract of Juglans regia via a straightforward process. The physio and phytochemical analysis of plant confirm the presence of macromolecules which function as bio-reductant and stabilize the nanoparticles.

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Objective: Telehealth and telemedicine systems aim to deliver remote healthcare services to mitigate the spread of COVID-9. Also, they can help to manage scarce healthcare resources to control the massive burden of COVID-19 patients in hospitals. However, a large portion of today's telehealth and telemedicine systems are centralized and fall short of providing necessary information security and privacy, operational transparency, health records immutability, and traceability to detect frauds related to patients' insurance claims and physician credentials.

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Objective: Quantitation of mechanical properties of a novel locking compression plate (LCP) for bovine tibia.

Study Design: Prospective in vitro study.

Sample Population: Adult Murrah buffalo (250-350 kg) tibiae.

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We report on the distributed shape measurement of small deformations produced along the length of an optical fiber. The fiber contains multiple waveguiding cores, each inscribed with weak continuous Bragg gratings. The distributed Bragg-reflectivity data for the fiber cores, obtained from the optical backscatter reflectometry, are used to estimate the local curvature and the position of the fiber.

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Article Synopsis
  • The study investigates the role of epithelial sodium channels (ENaC) in the tenogenic differentiation of human bone marrow-derived mesenchymal stromal cells (hMSCs) under mechanical strain.
  • hMSCs were subjected to uniaxial tensile loading, and analyses showed increased expression of tenogenic markers and ENaC subunits during stretching.
  • Blocking ENaC with a specific inhibitor led to a decrease in the expression of these tenogenic markers, indicating that ENaC is crucial for the differentiation of hMSCs in response to mechanical strain.
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We report on the excitation and polarization preserved propagation of a very large effective-area (A ∼ 2240 μm) higher-order-mode in an optical fiber. A laser signal operating in the 1 μm wavelength region is transported in a Bessel-like LP mode over a 10 m long section of the polarization-maintaining higher-order-mode fiber. We observe that the light propagates through the fiber with >10 dB polarization-extinction-ratio as the fiber is coiled into circular loops of 40 cm diameter.

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A 70-year-old man with history of metastatic well-differentiated neuroendocrine carcinoma was presented to the hospital with a painful left lower extremity ulcer which started around 3 months prior to presentation. He was treated with antibiotics for cellulitis on multiple occasions with no improvement in his symptoms. On initial laboratory evaluation, he was found to have acute kidney injury and a normal calcium level.

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The cavernous sinus is the most frequent dural sinus to become infected and thrombosed. Septic cavernous sinus thrombosis has become rare since the advent of antibiotics. We herein present a case of septic cavernous sinus thrombosis caused by chronic bacterial sinusitis.

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Healing of articular cartilage is a major clinical challenge as it also lacks a direct vasculature and nerves, and carries a limited number of resident chondrocytes that do not proliferate easily. Damaged articular cartilages are usually replaced by fibrocartilages, which are mechanically and structurally weaker and less resilient. Regenerative medicine involving stem cells is considered to have a definitive potential to overcome the limitations associated with the currently available surgical methods of cartilage repair.

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