Publications by authors named "Ahmed Hamdy"

Article Synopsis
  • - The study aimed to assess how common Sjögren's syndrome (SS) is in the Egyptian population and identify related factors among participants across various hospitals in Egypt.
  • - Among 7960 individuals screened, 64 were found with SS, with a higher occurrence in women, particularly in their 50s and 60s, and common symptoms included dry mouth and dry eyes.
  • - The research revealed SS is not uncommon in Egypt, highlighting the need for increased awareness among patients and healthcare providers about the condition.
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Introduction: The stability of soft tissue volume around dental implants is an important factor for the final esthetic outcome. The main objective of this study was to compare volume stable collagen matrix (VCMX) versus connective tissue graft (CTG) in the augmentation of soft tissue profiles in single implant sites with a class I Siebert ridge defect.

Materials And Methods: Twenty patients (14 females and 6 males) were enrolled in the present study.

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Introduction And Importance: The soft tissue volume and its stability around dental implants are important for the final aesthetic outcome.

Case Presentation: A 39-year-old female was referred for dental implant placement for her missing tooth. Following attachment of the cover screw VCMX was used to simultaneously augment buccal ridge defect.

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The objective of this paper is to investigate the existence of mild solutions and optimal controls for a class of stochastic Hilfer-Katugampola fractional differential inclusions (SHKFDIs) with non-instantaneous impulsive (NIIs) that is strengthened by Brownian motion (BM) and the Clarke sub-differential. First, we establish a new set of sufficient conditions for the existence of mild solutions of the aforementioned fractional systems by using stochastic analysis, the Clarke sub-differential's characteristics, and the multi-valued fixed point theorem. Subsequently, by employing Balder's theorem, the existence of optimal control pairs for the considered system is investigated.

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Article Synopsis
  • Rheumatoid arthritis (RA) is a condition where the immune system attacks the joints, and methotrexate is a key treatment but can lead to vitamin B12 deficiency and high homocysteine levels.
  • A study compared 50 RA patients on methotrexate with 49 on other treatments, looking at their vitamin B12, methylmalonic acid, and homocysteine levels.
  • Results showed that a higher percentage of methotrexate patients had elevated homocysteine levels, indicating a potential risk for vitamin B12 deficiency, even though the overall vitamin B12 levels were similar between the groups.
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The development of bioconjugates for the targeted delivery of anticancer agents is gaining momentum after recent success of antibody drug conjugates (ADCs) in the clinic. Smaller format conjugates may have several advantages including better tumor penetration; however, cellular uptake and trafficking may be substantially different from ADCs. To fully leverage the potential of small molecule drug conjugates (SMDCs) with potent binding molecules mediating tumor homing, novel linker chemistries susceptible for efficient extracellular activation and payload release in the tumor microenvironment (TME) need to be explored.

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Radioactive iodine isotopes especially I are used for diagnosis and treatment of different types of cancer diseases. Due to the leak of radioactive iodine into the patient's urine in turn, the wastewater would be contaminated, so it is worth preparing a novel adsorption green material to remove the radioactive iodine from wastewater efficiently. The removal of I and I contaminants from aqueous solution is a problem of interest.

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Female Genital Mutilation / Cutting (FGM/C), also known as female circumcision, is a human rights violation and is still happening to date. Every woman or girl has the right to be protected from this harmful practice. Egypt has adopted a multi-layered strategy to end FGM/C nationwide.

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This study investigated the dietary effects of coated L-ascorbic acid (LA) on growth, feed utilization, survival, serum biochemical indices, immunity, antioxidant capacity, and intestinal and hepatopancreatic histology of the pre-adult red swamp crayfish. Four isoproteinous and isolipidic diets were formulated to contain several LA levels as 0, 1300, 1600, and 1900 mg/kg and designated as control (LA0), LA13, LA16, and LA19, respectively. However, the analyzed LA concentrations in diets were 0.

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Article Synopsis
  • Double-hit diffuse large B-cell lymphoma (DH-DLBCL) is a challenging and aggressive form of non-Hodgkin lymphoma characterized by genetic alterations in MYC and BCL2, necessitating new treatment strategies.
  • Enitociclib, a CDK9 inhibitor, has shown promising results in clinical trials, leading to metabolic remissions in some patients with DH-DLBCL, while further research reveals its ability to regulate crucial cancer-related proteins and inhibit tumor growth in laboratory models.
  • The study underscores the importance of enitociclib as a potential novel treatment for MYC+ lymphomas, highlighting its effects on MYC and other transcription-related pathways, which could lead to wider therapeutic applications beyond MYC dependency.
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Purpose: Hypertensive emergency, a sudden and severe increase in blood pressure, necessitates immediate intervention to avoid end-organ damage. Cilostazol, a selective phosphodiesterase-III inhibitor, has vasodilator effect. Here, we investigated the effect of two commonly used statins, atorvastatin or rosuvastatin, on cilostazol antihypertensive activity in acute model of hypertension.

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The emerging field of small-molecule-drug conjugates (SMDCs) using small-molecule biomarker-targeted compounds for tumor homing may provide new perspectives for targeted delivery. Here, for the first time, we disclose the structure and the synthesis of VIP236, an SMDC designed for the treatment of metastatic solid tumors by targeting αvβ3 integrins and extracellular cleavage of the 7-ethyl camptothecin payload by neutrophil elastase in the tumor microenvironment. Imaging studies in the Lewis lung mouse model using an elastase cleavable quenched substrate showed pronounced elastase activity in the tumor.

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Background: Laparoscopic Nissen fundoplication (LNF) is the gold standard surgical intervention for gastroesophageal reflux disease (GERD). LNF can be followed by recurrent symptoms or complications affecting patient satisfaction. The aim of this study is to assess the value of the intraoperative endomanometric evaluation of esophagogastric competence and pressure combined with LNF in patients with large sliding hiatus hernia (>5 cm) with severe GERD (DeMeester score >100).

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Background: Hepatobiliary manifestations occur in ulcerative colitis (UC) patients. The effect of laparoscopic restorative proctocolectomy (LRP) with ileal pouch anal anastomosis (IPAA) on hepatobiliary manifestations is debated.

Aim: To evaluate hepatobiliary changes after two-stages elective laparoscopic restorative proctocolectomy for patients with UC.

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Background: IgG4-related disease (IgG4-RD) is a progressive and sometimes fatal disease that rarely affects pediatric age group. It may affect the orbits, lacrimal and salivary glands, pancreas, kidneys, peritoneum and other organs. Lung and pleura are not commonly reported in IgG4-RD.

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Introduction: The identification and validation of a non-invasive prognostic marker for early detection of diabetic kidney disease (DKD) can lead to substantial improvement in therapeutic decision-making.

Objectives: The main objective of this study is to assess the potential role of the arachidonic acid (AA) metabolite 20-hydroxyeicosatetraenoic (20-HETE) in predicting the incidence and progression of DKD.

Methods: Healthy patients and patients with diabetes were recruited from the Hamad General Hospital in Qatar, and urinary 20-HETE levels were measured.

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Aim: The study aimed primarily to compare the transverse rectal diameter in children with functional constipation (FC) and children without constipation in different age groups, and between cases of constipation at baseline and after treatment. Secondary aim was to determine factors that could affect the transverse rectal diameter.

Methods: A controlled prospective study, including a total of 100 children between the ages of 2 and 11 years, who were divided into 50 patients suffering from constipation according to Rome IV criteria and 50 age- and sex-matched controls.

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The antifungal effect of metabolites produced by a new strain of LPP703, isolated from naturally fermented yak yogurt, was investigated. The results showed that LPP703 significantly inhibited four fungal species, including sp., , , and .

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Searching for bioactive compounds within the huge chemical space is like trying to find a needle in a haystack. Isatin is a unique natural compound which is endowed with different bio-pertinent activities, especially in cancer therapy. Herein, we envisaged that adopting a hybrid strategy of isatin and α,β-unsaturated ketone would afford new chemical entities with strong chemotherapeutic potential.

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Inhibition of dipeptidyl peptidase-4 (DPP-4) is an effective way to control blood glucose in diabetic patients. is an edible insect containing abundant protein. protein-derived peptides can suppress the DPP-4 activity.

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Chronic lymphocytic leukemia (CLL) is effectively treated with targeted therapies including Bruton tyrosine kinase inhibitors and BCL2 antagonists. When these become ineffective, treatment options are limited. Positive transcription elongation factor complex (P-TEFb), a heterodimeric protein complex composed of cyclin dependent kinase 9 (CDK9) and cyclin T1, functions to regulate short half-life transcripts by phosphorylation of RNA Polymerase II (POLII).

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Introduction And Importance: This case report describes a novel technique for management of peri-implant wound dehiscence that involves using auto graft from the same surgical site to seal the dehiscence defect.

Case Presentation: A 21-year-old female was referred for extraction of a non-restorable lower left first molar and replacement by immediate dental implant. Following attachment of the cover screw bone graft biomaterial and collagen membrane was secured over the biomaterial and buccal flap was coronally positioned and sutured.

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Allergic diseases, derived from the dysregulation of immune tolerance mechanisms, have been rising in the last two decades. Recently, increasing evidence has shown that probiotic-derived polysaccharide capsules exhibit a protective effect against allergic diseases, involving regulation of Th1/Th2 balance, induction of differentiation of T regulatory cells and activation of dendritic cells (DCs). DCs have a central role in controlling the immune response through their interaction with gut microbiota their pattern recognition receptors, including Toll-like receptors and C-type-lectin receptors.

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Sea cucumber (bche-de-mer, Echinodermata: Holothuroidea) is one of the top internationally traded seafood varieties. Besides its direct nutritional benefits, it is continuously used in the traditional medicine in different areas and cultures in the world. This world-wide interest triggered various issues related to stocks declining and risks of species extinction.

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Background: Interleukin 1 inhibition with anakinra has shown efficacy in the management of crystalline-induced arthritis (CIA) flares. Gout treatment guidelines recommend its use after contraindication or intolerance to first-line therapies. The aim of this study is to identify features associated with better response to anakinra when used to treat CIA flares.

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