Search results for "Polyp"
showing 10 items of 1415 documents
The Different Immune Profiles of Normal Colonic Mucosa in Cancer-Free Lynch Syndrome Carriers and Lynch Syndrome Colorectal Cancer Patients.
2021
ABSTRACT Background and aims Due to the high load of immunogenic frameshift neoantigens, tumors arising in individuals with Lynch syndrome (LS), the most common inherited colorectal cancer (CRC) syndrome, are characterized by a pronounced immune infiltration. However, the immune status of normal colorectal mucosa in LS is not well characterized. We assessed the immune infiltrate in tumor-distant normal colorectal mucosa from LS CRC patients, sporadic microsatellite-unstable (MSI) and microsatellite-stable (MSS) CRC patients, and cancer-free LS carriers. Methods CD3-positive, FOXP3-positive and CD8-positive T cells were quantified in 219, 233 and 201 formalin-fixed paraffin-embedded (FFPE) n…
Somatic mutation profiles as molecular classifiers of ulcerative colitis-associated colorectal cancer.
2021
Ulcerative colitis increases colorectal cancer risk by mechanisms that remain incompletely understood. We approached this question by determining the genetic and epigenetic profiles of colitis-associated colorectal carcinomas (CA-CRC). The findings were compared to Lynch syndrome (LS), a different form of cancer predisposition that shares the importance of immunological factors in tumorigenesis. CA-CRCs (n=27) were investigated for microsatellite instability, CpG island methylator phenotype, and somatic mutations of 999 cancer-relevant genes ("Pan-cancer" panel). A subpanel of "Pan-cancer" design (578 genes) was used for LS colorectal tumors (n=28). Mutational loads and signatures stratifie…
POLE, POLD1, and NTHL1: the last but not the least hereditary cancer-predisposing genes
2021
POLE, POLD1, and NTHL1 are involved in DNA replication and have recently been recognized as hereditary cancer-predisposing genes, because their alterations are associated with colorectal cancer and other tumors. POLE/POLD1-associated syndrome shows an autosomal dominant inheritance, whereas NTHL1-associated syndrome follows an autosomal recessive pattern. Although the prevalence of germline monoallelic POLE/POLD1 and biallelic NTHL1 pathogenic variants is low, they determine different phenotypes with a broad tumor spectrum overlapping that of other hereditary conditions like Lynch Syndrome or Familial Adenomatous Polyposis. Endometrial and breast cancers, and probably ovarian and brain tumo…
Quantitative fluorescence determination of long-fragment DNA in stool as a marker for the early detection of colorectal cancer
2008
Background: A variety of molecular markers have been evaluated for the development of a non-invasive approach to the diagnosis of colorectal cancer. We aimed to validate the diagnostic accuracy, using the same threshold as in the previous pilot study, of fluorescent long DNA test as a relatively simple and inexpensive tool for colorectal cancer detection.Methods: A case-control study was conducted on 100 healthy subjects and 100 patients at first diagnosis of colorectal cancer. Human long-fragment DNA in stool was quantified by fluorescence primers and a standard curve and expressed in DNA nanograms.Results: We validated the 25-ng value, which emerged as the most accurate cut-off in the pil…
Familial aggregation of tumors and detection of hereditary non-polyposis colorectal cancer in 3-year experience of 2 population-based colorectal-canc…
1995
The clinical data of 2 population-based registries, located in areas with different incidence rates of colorectal cancer, were used in order to assess the role of familial factors in the pathogenesis of these tumors. The occurrence of tumors in family members was investigated in 389 subjects with colorectal cancer registered in Modena (Northern Italy, an area characterized by a high incidence of colorectal malignancies) between 1984 and 1986; similar information was obtained in 213 patients with tumors of the large bowel registered in Ragusa (Sicily, Southern Italy, an area of similar magnitude and with low incidence rates for these tumors) in the 3-year period 1988 to 1990. In both series,…
Factors influencing survival after resection of pancreatic cancer. A DNA analysis and a histomorphologic study
1994
BACKGROUND The influence of DNA content on prognosis in stomach cancer has been investigated rarely, and the results are controversial. METHOD The prognostic relevance of the DNA content and histomorphologic parameters was evaluated in 41 patients after resection of pancreatic cancer. RESULTS In the univariate analysis, the DNA content, tumor size, lymph node status, tumor stage, nuclear grade, and type of resection had a statistically significant influence on the prognosis. No association was found between the DNA content and the histomorphologic features. Apart from the operative procedure, the DNA content was the strongest indicator of prognosis in the multivariate analysis. CONCLUSIONS …
Stable polyplexes based on arginine-containing oligopeptides for in vivo gene delivery.
2004
In this study, we investigated to what extent the stability and transduction capacity of polyplexed DNA can be improved by optimizing the condensing peptide sequence. We have synthesized a small library of cationic peptides, at which the lysine/arginine ratio and the cation charge were varied. All peptides were able to compact DNA, at which polyplexes of short lysine-rich sequences were considerably larger than those of elongated or arginine-rich peptides (GM102 and GM202). In addition, the arginine-rich peptides GM102 and GM202 rendered the polyplexes resistant to plasma incubation or DNase I-mediated digestion. While all peptides were found to improve the transfection efficiency in HepG2 …
Blue-light imaging compared with high-definition white light for real-time histology prediction of colorectal polyps less than 1 centimeter: a prospe…
2019
Blue-light imaging (BLI) is a new chromoendoscopy technique, potentially useful for differentiating neoplastic from nonneoplastic lesions. The present study was aimed at comparing BLI with high-definition white light (HDWL) in the real-time histology prediction of colon polyps 10 mm.Consecutive outpatients undergoing colonoscopy with the ELUXEO 7000 endoscopy platform and 760 series video colonoscopes (Fujifilm Co, Tokyo, Japan) who had at least 1 polyp 10 mm were randomized to BLI or HDWL for polyp characterization. The accuracy of high-confidence real-time histology prediction (adenoma vs not adenoma) by either BLI or HDWL for polyps 10 mm (primary end-point) and diminutive (≤5 mm) polyps…
Differential protective effects of red wine polyphenol extracts (RWEs) on colon carcinogenesis.
2014
Various epidemiological studies have shown that a regular and moderate consumption of red wine is correlated with a decreased relative risk of developing coronary heart disease and cancer. These health benefits are commonly attributed to high contents of polyphenols, particularly resveratrol, representing important sources of antioxidants. However, resveratrol does not seem to be the only bioactive compound present in the wine which contains numerous other polyphenols. The present study investigates the efficiency of red wine extracts (RWEs), containing different polyphenols, on colon cancer cell proliferation in vitro and on colonic aberrant crypt foci (ACF) in vivo. Proliferation, cell cy…
Risk Factors and Number of Falls as Determinants of Quality of Life of Community-Dwelling Older Adults.
2019
Background and purpose In older adults, the psychological impact and effects related to the loss of functional capacity are directly related to perceived quality of life (QOL). The predictors of better QOL are increased physical activity, lower prevalence of overweight, lower cases of depression, and lower rate of reported alcohol abuse. On the contrary, the predictors of decreased QOL are female gender, comorbidity, deficient nutritional condition, polypharmacy, loss of mobility, depression and dependency, poor economic conditions, and social isolation and loneliness. Furthermore, QOL in older adults is more dependent on the number of falls than comorbidity. The objective was to investigat…