Calprotectin, a calcium-bound protein complex, is abundant in the cytosol of neutrophils. It has been reported that this protein has an apoptotic activity in tumor cells. Since calprotectin increases in colorectal cancer, this study was conducted to investigate, for the first time, the cytotoxicity/apoptotic effect of calprotectin on HT29/219 and SW742 colon carcinoma and adenocarcinoma cell li...

Background: Calprotectin is cytotoxic agent that its anti-tumor effects are governed through suppression of topoisomerase II a key enzyme in apoptosis. In previous studies, cytotoxicity and apoptotic effects of calprotectin are shown on different cancer cell lines, but not human gastric cancer cell lines. In the present study, cytotoxicity and apoptotic effects of calprotectin on human gastric ...

abstract background: chemotherapy by using agents such as etoposide is a common way for inhibition of tumors. this treatment is accompanied by many undesirable side effects. calprotectin is an abundant protein in the neutrophil cytosol, it has growth-inhibitory and apoptosis-inducing activities against various cell types such as tumor cells. in this study to introduce calprotectin as a suitable...

Squamous mucosal epithelial cells constitutively express calprotectin in the cytoplasm. To study how this antimicrobial protein complex confers epithelial resistance to invading bacteria, an epithelial cell line was stably transfected to express the calprotectin complex. Cells expressing calprotectin resist invasion by Listeria monocytogenes and Salmonella enterica serovar Typhimurium. Calprote...

INFLAMMATORY MEDIATORS TRIGGER POLYMORPHONUCLEAR NEUTROPHILS (PMN) TO PRODUCE REACTIVE OXYGEN SPECIES (ROS: O(2) (-), H(2)O(2), ∙OH). Mediated by myeloperoxidase in PMN, HOCl is formed, detectable in a chemiluminescence (CL) assay. We have shown that the abundant cytosolic PMN protein calprotectin (S100A8/A9) similarly elicits CL in response to H(2)O(2) in a cell-free system. Myeloperoxidase an...

BACKGROUND/AIMS Several studies have found that the measurement of fecal calprotectin is useful for the early diagnosis of inflammatory bowel disease (IBD). We compared the effectiveness of three different fecal calprotectin kits for initial diagnosis in patients with suspected IBD. METHODS We enrolled 31 patients with IBD (18 Crohn's disease [CD], 11 ulcerative colitis [UC], and two intestin...

OBJECTIVE To analyse levels of S100A8/S100A9 (calprotectin) and selected cytokines, in blood, in patients with psoriatic arthritis (PsA). METHODS Sixty-five patients with PsA were examined for clinical manifestations and laboratory measurements of S-calprotectin, ESR, hs-CRP, and selected cytokines. Thirty-two patients had mono-/oligoarthritis and 33 had polyarthritis. S-calprotectin, hs-CRP,...

BACKGROUND Patients with ankylosing spondylitis (AS) are at increased risk of developing inflammatory bowel disease (IBD). We aimed to determine the variation in fecal calprotectin in AS over 5 years in relation to disease activity and medication and also to study the incidence of and predictors for development of IBD. METHODS Fecal calprotectin was assessed at baseline (n = 204) and at 5-yea...

introduction: human calprotectin is an abundant protein in the neutrophil, monocyte and macrophage cytosol. effect of proliferation inhibition of this protein has been elucidated on hepatoma, melanoma, murine fibrosarcoma lukemia and human adenocarcenoma breast cancer but not in human gastric cancer cell lines. in present study, in vitro proliferation inhibition effect of calprotectin in differ...