Publications by authors named "Mohammed AlSwayyed"

Introduction: Genetic diversity in the killer immunoglobulin-like receptor (KIR) gene composition and human leukocyte antigen (HLA) class I ligands, such as HLA-C, can affect the activity of natural killer cells and determine anti-cancer immunity. Specific combinations can enhance cancer predisposition by promoting immune evasion. Studying the relationship between polymorphisms and thyroid cancer (TC) risk can offer insights into how natural immunity fails, leading to disease development.

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  • The appendix is a small organ with no known specific function, and primary appendiceal neoplasms (ANs) are rare, with a rise in prevalence noted globally but not in the Arabian Gulf States.
  • A study in Saudi Arabia evaluated the characteristics and prevalence of ANs at a tertiary care center, focusing on demographics, clinical presentations, and outcomes from patients over a five-year period.
  • The findings highlighted that most AN patients were middle-aged, with low-grade mucinous neoplasms being the most common type, and indicated low complication rates and good overall survival outcomes.
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Introduction And Importance: Mesodermal mesenchymal polyps (Fibroepithelial stromal polyps) are mesenchymal embryological structures that remain and grow to be an apparent polyp-like lesion in females of reproductive age. We present this case of mesodermal mesenchymal polyp in a young female arising at the hymenal ring of the vagina making the introitus very wide. We highlighted in our case the importance of recognizing mesenchymal lesions and their differential diagnosis to provide the patients with optimal care.

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  • Chronic Rhinosinusitis (CRS) affects 5%-12% of people worldwide and is classified into type 2 and non-type 2 diseases, with type 2 inflammation marked by specific cytokines and immune cell activity.
  • A retrospective study in Saudi Arabia assessed the prevalence of type 2 inflammation in patients with nasal polyps who underwent Endoscopic Sinus Surgery (ESS) from 2015 to 2020, focusing on factors like blood eosinophils and IgE levels.
  • Results showed a striking 99.7% prevalence of type 2-CRS among the 381 studied patients, with significant rates of olfactory dysfunction and common co-morbidities like allergic rhinitis and asthma.
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Chemotherapeutic drugs, such as doxorubicin (Dox), are commonly used to treat a variety of malignancies. However, Dox-induced cardiotoxicity limits the drug's clinical applications. Hence, this study intended to investigate whether diosmin could prevent or limit Dox-induced cardiotoxicity in an animal setting.

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Primary adrenal angiosarcoma is a very rare malignancy. This is a case report of a 54-year-old female, who presented with right-sided abdominal pain. Magnetic resonance imaging of the abdomen and pelvis showed a right adrenal mass with a maximum dimension of 5.

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Head and neck squamous cell carcinomas (HNSCCs) are a common type of cancer, ranking as the sixth most prevalent cancer worldwide and having a high morbidity and mortality rate. Among oropharyngeal squamous cell carcinoma (OPSCC) cancers, tonsillar squamous cell carcinoma (TSCC) is the most prevalent and has a particularly aggressive clinical course with poor disease outcomes. The tumor microenvironment (TME) of HNSCC is complex and heterogeneous, playing a crucial role in effective cancer therapy.

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  • Fentanyl is a potent opioid approved for pain management but has high overdose risks, particularly affecting liver health.
  • Research indicates that the beta-lactam compound MC-100093 can help regulate glutamate transporter-1 (GLT-1) levels, which may alleviate conditions linked to opioid use disorders and liver issues.
  • In a study using a fentanyl overdose mouse model, both MC-100093 and ceftriaxone improved liver metabolite profiles, with MC-100093 showing better results in reversing the negative impacts of fentanyl overdose.
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Sodium-glucose cotransporter-2 (SGLT2) inhibitors have been suggested to have anti-inflammatory properties in diabetes. The goal of this study was to evaluate the role of the SGLT2 inhibitor dapagliflozin (DAPA) in the attenuation of lipopolysaccharide (LPS)-induced hypotension. Male Wistar albino rats were divided into normal and diabetic groups and received DAPA (1 mg/kg/day) for two weeks followed by a single dose of 10 mg/kg LPS.

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Cytotoxic T lymphocyte antigen-4 (CTLA-4) has been identified as an immunosuppressive molecule involved in the negative regulation of T cells. It is highly expressed in several types of autoimmune diseases and cancers including colorectal cancer (CRC). (1) To explore the association between CTLA-4 single nucleotide polymorphisms (SNP) and risk to (CRC) in the Saudi population.

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  • This study investigated the effectiveness of different blood tests for diagnosing celiac disease (CD) among Saudi Arabian children and adults, finding a high prevalence of the condition in the country.
  • The research analyzed 148 patients with CD and 512 controls, focusing on tests like IgA anti-tissue transglutaminase antibodies (TTG) and endomysium antibodies (EMA).
  • Results showed that IgA anti-TTG was the most sensitive test, and EMA was the most specific, suggesting that using these tests could reduce the need for invasive intestinal biopsies in many patients.
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Gefitinib (GEF) is an inhibitor of the epidermal growth factor receptor, linked to higher risk of severe/fatal interstitial lung disease (ILD). This study was performed to determine the protective roles of an angiotensin-II type-1 receptor (AT1R) "valsartan (VAL)" in prevention of lung inflammation, oxidative stress and metabolites alteration induced by GEF. Four groups of male Wistar albino rats were received vehicle, VAL (30 mg/kg), GEF (30 mg/kg), or both for four weeks.

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Gefitinib is a tyrosine kinase inhibitor (TKI) of the epidermal growth factor receptor (EGFR), used for the treatment of advanced or metastatic non-small cell lung cancer. Recently, studies proved that Gefitinib-induced cardiotoxicity through induction of oxidative stress leads to cardiac hypertrophy. The current study was conducted to understand the mechanisms underlying gefitinib-induced cardiac hypertrophy through studying the roles of angiotensin II (AngII), oxidative stress, and mitogen-activated protein kinase (MAPK) pathway.

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Cardiovascular damage induced by anticancer therapy has become the main health problem after tumor elimination. Venetoclax (VTX) is a promising novel agent that has been proven to have a high efficacy in multiple hematological diseases, especially acute myeloid leukemia (AML) and chronic lymphocytic leukemia (CLL). Considering its mechanism of action, the possibility that VTX may cause cardiotoxicity cannot be ruled out.

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  • CMMRD syndrome is a serious and rare genetic disorder causing multiple cancers due to mutations in mismatch repair genes, leading to a poor prognosis.
  • The first reported case in the Gulf region involves a 13-year-old girl with advanced juvenile rectal cancer, presenting with concerning symptoms and previously undiagnosed genetic factors.
  • After receiving neoadjuvant chemoradiotherapy and undergoing major surgical procedures, the family opted out of additional therapy but chose to participate in monitoring and genetic testing, highlighting the difficulties clinicians face with rare syndromes like CMMRD.
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Doxorubicin-mediated kidney impairment is a serious problem in cancer treatment. Accordingly, this work investigated the ability of geraniol to modulate doxorubicin-induced kidney damage using a rat model. Rats were randomly assigned to four groups: control, doxorubicin (20 mg/kg, intraperitoneal, i.

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BACKGROUND Endometriosis, a common condition among women of reproductive age and infertile women, occurs when the endometrium extends outside the uterus. When this endometrial tissue grows and sheds, symptoms will develop. The presentation varies depending on the site involved; however, cyclical pain is among its most common symptoms, along with bleeding and cramping.

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  • - Doxorubicin (Dox) is a chemotherapy drug used to treat several cancer types but can cause kidney damage (nephrotoxicity), limiting its effectiveness.
  • - Diosmin, a compound found in citrus fruits, has antioxidant and anti-inflammatory properties and was studied for its potential to protect against Dox-induced kidney damage.
  • - The research showed that diosmin reduced kidney damage caused by Dox in rats by improving antioxidant defenses, reducing inflammation, and restoring kidney structure, indicating its potential as a protective agent.
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  • Doxorubicin (DOX) is known to cause heart damage, so researchers sought a way to counteract that effect using valsartan (VAL).
  • In their study, Sprague-Dawley rats were divided into four groups to observe how VAL affected heart health when used with DOX over 14 days.
  • The findings showed that combining VAL with DOX reduced cardiac damage, inflammation, and fibrosis, while improving critical protein expressions and restoring essential metabolic pathways compared to DOX alone.
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BACKGROUND Ovarian leiomyomas are rare, benign, smooth muscle, solid tumors that occur in women aged 20 to 65 years. Because their histology is benign, the prognosis for patients is good. We report the case of a patient with a huge ovarian leiomyoma who presented to the General Surgery Clinic with chronic abdominal pain and progressive abdominal distention.

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Sorafenib is a small, orally-active multikinase inhibitor that is most frequently used for the management of renal cell carcinoma, hepatocellular carcinoma, and radioactive iodine-resistant thyroid carcinoma. However, recent reports have associated sorafenib with hepatotoxicity that can limit its clinical application, although the mechanism of hepatotoxicity is still to be elucidated. Thus, our study was designed to explore the molecular mechanisms underlying sorafenib-induced hepatotoxicity in an model.

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Introduction: With the rarity and benign nature, angioleiomyoma is a tumor of disputed etiology that originates from the tunica media of the blood vessels. Lacking any characteristic clinical or radiological features, often leading to preoperative misdiagnosis, it is only diagnosed confidently on the basis of histopathology; for this reason combined with the rarity, angioleiomyoma would not be usually found at the top of the differential diagnosis list. Local excision is usually curative with excellent prognosis.

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Gefitinib is an effective treatment for patients with locally advanced non-small cell lung cancer. However, it is associated with cardiotoxicity that can limit its clinical use. Liraglutide, a glucagon-like peptide 1 receptor agonist, showed potent cardioprotective effects with the mechanism is yet to be elucidated.

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BACKGROUND Heterotopic pancreas is pancreatic tissue that presents outside the normal anatomical location. It is mostly discovered in the upper gastrointestinal tract (mostly the foregut). We report the first case report of incidentaloma of duodenal heterotopic pancreas in obese patients during laparoscopic sleeve gastrectomy.

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