نتایج جستجو برای: polyp
تعداد نتایج: 8449 فیلتر نتایج به سال:
Polyphosphate (polyP) granule biogenesis is an ancient and ubiquitous starvation response in bacteria. Although the ability to make polyP is important for survival during quiescence and resistance to diverse environmental stresses, granule genesis is poorly understood. Using quantitative microscopy at high spatial and temporal resolution, we show that granule genesis in Pseudomonas aeruginosa i...
Polyphosphate is a novel pro-inflammatory regulator of mast cells and is located in acidocalcisomes.
Polyphosphate (polyP) is a pro-inflammatory agent and a potent modulator of the human blood-clotting system. The presence of polyP of 60 phosphate units was identified in rat basophilic leukemia (RBL-2H3) mast cells using specific enzymatic assays, urea-polyacrylamide gel electrophoresis of cell extracts, and staining of cells with 4,6-diamidino-2-phenylindole (DAPI), and the polyP-binding doma...
background: nasal polyps, a common clinical problem, are characterized by eosinophilic and mast cell inflammation. the role of allergy and ige in pathogenesis of nasal polyps is still unclear. ige receptors are important components of the immunological pathway in allergic and inflammatory diseases. objective: to determine if the low affinity ige receptor (cd23) is presented on nasal polyp t...
Based on natural principles, we developed a novel toothpaste, containing morphogenetically active amorphous calcium polyphosphate (polyP) microparticles which are enriched with retinyl acetate (“a-polyP/RA-MP”). The spherical microparticles (average size, 550 ± 120 nm), prepared by co-precipitating soluble Na-polyP with calcium chloride and supplemented with retinyl acetate, were incorporated i...
BACKGROUND Accurate measures of the total polyp burden in familial adenomatous polyposis (FAP) are lacking. Current assessment tools include polyp quantitation in limited-field photographs and qualitative total colorectal polyp burden by video. OBJECTIVE To develop global quantitative tools of the FAP colorectal adenoma burden. DESIGN A single-arm, phase II trial. PATIENTS Twenty-seven pa...
Background & Aim: There are many suggestions for nasal polyp formation mechanism. The present study was carried out to evaluate T-cell infiltration in nasal mucosa and specific allergic reactions in context of probable irregular systemic immune responses in nasal polyp disease. Patients & Methods: 60 patients with nasal polyps who referred to ENT ward of Rasoul-e-Akram Hospital were studied...
Background: There are several studies evaluating Helicobacter pylori (H.pylori) in nasal and sinus mucosa�in chronic rhinosinusitis however studies dealing with the direct evaluation of H.pylori in nasal polyps are limited. So the objective of this research was to evaluate the frequency of H.pylori nasal polyp and sinus mucosa of patients with nasal polyp in comparison to sinus biopsy speci...
colorectal cancer is the most common gastrointestinal cancer and the second leading cause of cancer deaths worldwide. the purpose of this study is to investigate the prevalence of epstein-barr virus in patients with colorectal carcinomas and polyps in comparison with healthy people. in this analytical case-control study, 15 patients with colorectal cancer and 20 patients with colorectal polyp ...
Serrated adenomas (SAs) are part of the distinct serrated polyp pathway of colorectal carcinogenesis characterized by microsatellite instability and deficiency in DNA mismatch repair. Sessile SA is a recently recognized lesion that typically presents as a large sessile polyp, but lacks the conventional dysplasia. It is more frequently found on the right side than on the left side of the colon, ...
Nasal polyp is one of the common causes of nasal obstruction. The diagnosis is usually made on clinical ground and rarely needs histological examination. However, when a candidate is selected for the surgical option of polyp removal, there is tendency to send all specimens for routine histological examination. The objective of this study was to assess the necessity of routinely performed histol...
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