Search results for "COX-2"
showing 10 items of 31 documents
Mesenchymal Transition of High-Grade Breast Carcinomas Depends on Extracellular Matrix Control of Myeloid Suppressor Cell Activity
2016
SummaryThe extracellular matrix (ECM) contributes to the biological and clinical heterogeneity of breast cancer, and different prognostic groups can be identified according to specific ECM signatures. In high-grade, but not low-grade, tumors, an ECM signature characterized by high SPARC expression (ECM3) identifies tumors with increased epithelial-to-mesenchymal transition (EMT), reduced treatment response, and poor prognosis. To better understand how this ECM3 signature is contributing to tumorigenesis, we expressed SPARC in isogenic cell lines and found that SPARC overexpression in tumor cells reduces their growth rate and induces EMT. SPARC expression also results in the formation of a h…
Variances in the Level of COX-2 and iNOS in Different Grades of Endometrial Cancer.
2019
Background:Many experimental studies have demonstrated the importance of COX-2 in the tumor angiogenesis. Inducible iNOS is responsible for a high and stable level of nitric oxide and is expressed in response to pro-inflammatory factors.Objective:The aim of this study was to evaluate the expression of COX-2 and iNOS at the protein level and to assess their potential prognostic significance in patients with endometrial cancer.Methods:The study group consisted of 45 women with endometrial cancer divided according to the degree of histological differentiation i.e. G1, 17; G2, 15; G3, 13. The control group consisted of 15 women without neoplastic changes. The expression of studied proteins was …
Gastric adenomas: relationship between clinicopathological findings, Helicobacter pylori infection, APC mutations and COX-2 expression.
2006
Gastric adenomas are rare neoplastic growths characterized by localized polypoid proliferations of dysplastic epithelium that tend to progress to infiltrating adenocarcinoma. Therefore, the identification of molecular markers that could reliably recognize adenomas at risk of progression is advocated in the clinical management. In this study we investigated, in a series of gastric adenoma specimens from an area at high risk of gastric cancer, the relationship between clinicopathological characteristics of adenoma and Helicobacter pylori infection, APC mutational status, and COX-2 and the down-stream enzyme mPGES1 expression. Helicobacter pylori infection, detected in 24%, and 33% by histolog…
Association between COX-2 rs 6681231 genotype and interleukin-6 in periodontal connective tissue. A pilot study.
2014
[Objectives] The aim of this pilot study was to investigate associations between IL-6 and COX-2 expression in gingival biopsies and both clinical diagnosis and genotypes in the IL-6 and COX-2 genes. [Design] A case-control study included 41 gingival biopsies obtained from Caucasian patients grouped according to clinical diagnosis of gingival health (n = 10), gingivitis (n = 15) or chronic periodontitis (n = 16). Immunohistochemistry analyses were performed to determine COX-2 expression in lamina propria, IL-6 expression in lamina propria and gingival epithelium and level of inflammatory cell infiltrate. Individual DNA was extracted and genotyped by real-time PCR for IL6 SNPs rs 2069827 and …
A Practical Perspective: The Effect of Ligand Conformers on the Negative Image-Based Screening.
2019
Negative image-based (NIB) screening is a rigid molecular docking methodology that can also be employed in docking rescoring. During the NIB screening, a negative image is generated based on the target protein’s ligand-binding cavity by inverting its shape and electrostatics. The resulting NIB model is a drug-like entity or pseudo-ligand that is compared directly against ligand 3D conformers, as is done with a template compound in the ligand-based screening. This cavity-based rigid docking has been demonstrated to work with genuine drug targets in both benchmark testing and drug candidate/lead discovery. Firstly, the study explores in-depth the applicability of different ligand 3D conformer…
COX-2 gene CpG islands methylation status and SNP -765G>C as potential biomarkers of prognosis in pancreatic adenocarcinoma
2009
Safety of rofecoxib in subjects with a history of adverse cutaneous reactions to aspirin and/or non-steroidal anti-inflammatory drugs
2002
Background: Adverse reactions to non-steroidal anti-inflammatory drugs (NSAID)s are frequent, and the need to identify a safe alternative drug is a common problem in clinical practice. Objective: To assess the tolerability ofrofecoxib, a drug that specifically inhibits COX-2, in a group of NSAID-sensitive patients. Methods: One-hundred and four subjects (29 males and 75 females, mean age 35.6 ± 14.1) were enrolled. All subjects had experienced one or more episode characterized by cutaneous symptoms (erythema, and/or urticaria angioedema) following the assumption of NSAIDs; 92 subjects experienced reactions to only one NSAID (single intolerance: SI) and 12 subjects had reactions to multiple …
Gene expression profiling of human liver cancer cells following celecoxib tretment
2010
Cyclooxygenase- 2, Tumor Necrosis Factor-α, Vascular Endothelial Growth Factor-A and IL-6 genes SNPs and IL-6 serum levels in liver cirrhosis and hep…
2011
COX-2 ekspresijas inducēšana LPS iekaisuma modelī neiroblastomas SH-SY5Y šūnu līnijā
2015
COX-2 ir COX izoenzīms, kas atbild par arahidonskābes metabolismu, sintezējot bioloģiski aktīvus iekaisuma mediatorus – prostanoīdus. Perifērijā COX-2 ir inducējama izoforma, bet smadzenēs – konstitutīva. Šī darba mērķis bija izpētīt LPS spēju inducēt COX-2 ekspresiju neiroblastomas SH-SY5Y šūnās. COX-2 ekspresijas noteikšanai tika izmantota imūnfluorescences metode. Rezultāti uzrādīja SH-SY5Y šūnu morfoloģijas izmaiņas dažādu LPS koncentrāciju (5 – 800 ng/ml) ietekmē. Pētījumā novēroja COX-2 ekspresiju kontroles šūnās normālos apstākļos, LPS koncentrācijā 5 ng/ml COX-2 ekspresijas indukciju, bet koncentrācijā 25 ng/ml un 50 ng/ml – supresiju. Statistiski ticamu rezultātu uzrādīja LPS konce…