Family Colorectal Cancer Awareness and Risk Education Project (Family CARE Project)
Ontology highlight
ABSTRACT:
DISEASE(S): Colorectal Cancer,Colorectal Neoplasms,Cancer
PROVIDER: 2100617 | ecrin-mdr-crc |
REPOSITORIES: ECRIN MDR
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Project description:Atmospheric particulate matter (PM) is a recognized risk factor for the global burden of disease in human populations. We are presenting here the application of toxicogenomics in the evaluation of the toxic effects of organic content of atmospheric particle matter (PM), from urban and rural environments (city of Barcelona and village of La Pobla, NE Spain), using the developing zebrafish embryo. The main goal is to identify the metabolic pathways involved in the adverse effects observed in zebrafish embryos exposed to PM organic content from urban and rural environments, also allowing the selection of genes of interest that are differentially expressed. The relevance of particle size to the PM toxicity is also addressed. Indeed, the zebrafish embryos were exposed to PM of aerodynamic diameter larger than 7.2 μm and smaller than 0.5 μm (PM10 and PM0.5, respectively). PM0.5 concentrated biological and toxic activities linked to organic substances. Transcriptomic analyses showed strong induction of the AhR signalling pathway (a.k.a. dioxin-like activity) for embryos exposed to both rural and urban extracts, correlating with the concentrations of PAHs. Urban extracts, with strong contribution of traffic emissions, specifically de-regulated oxidative stress-related genes, as well as pancreatic and eye-lens specific genes, two organs known to be affected by air pollution in humans. Exposure to rural extracts, with high contribution of wood burning emissions, affected genes implicated in basic cellular functions, in agreement with their strong embryotoxicity. Extracts from rural and urban samples elicited both common and specific transcriptome responses, suggesting different potentially adverse outcomes depending on PM source and composition. The authors thank the financial support of the Spanish Ministry (project TEA-PARTICLE, grant number CGL2011-29621) and the Portuguese Foundation for Science and Technology for the doctoral grant of Sofia R. Mesquita (SFRH/BD/80710/2011) funded by the Program POPH-QREN through the Portuguese Ministry of Education and Science and the European Social Fund, and support through project PEst-C/MAR/LA0015/2013.
2015-10-26 | GSE53522 | GEO
Project description:Interventions: Individuals from intervention General Practices who opt in to the study will be given a password, allowing them to access the ‘Family History Website’ tool. This online tool will collect information about their family history of colorectal cancer and encourage discussion with their relatives so that they can gather accurate information. Upon completion of the questionnaire, individuals will be assigned to a NHMRC designated risk category for developing CRC, which will be accompanied by the appropriate screening recommendations, with a personalised summary of their information. This information will be accessible to their GP via a shared access facility, and participants will be encouraged to discuss their results with their GP within the following consultation. The completion of the family history website and GP consultation thereafter, is known as Assessment 1 at time = 0. Participants will be followed up 12 months after their completion of the ‘Family History Website’, where they will be required to self report their five year screening behaviour; while their GP’s will complete a file audit and a survey about the utility of the ‘Family History Website’ tool in addition to their knowledge about CRC risk and screening guidelines. This will be known as assessment 2 at time =1
Primary outcome(s): Outcome Aim: Risk appropriate screening uptake as measured by the participants’ five year screening behaviour in relation to their colorectal cancer risk category
Five year screening behaviour- All participants will have their five year screening behaviour recorded at time=1 by self report[12 to 18 months after randomisation, t=1];Colorectal cancer risk category- Intervention practice participants will receive a CRC risk category after completing the ‘Family History Website’ tool., at some time within the 12 month time period t=0. However, participants from control practices will asked about their ‘known family history’ at time=1, and will not be allowed access to the ‘Family History Website’ tool, until after that information is collected.[Within 12 months of the intervention , t=0 for the intervention group and one year after randomisation, t=1 for the control group]
Study Design: Purpose: Prevention; Allocation: Randomised controlled trial; Masking: Blinded (masking used);Assignment: Parallel;Type of endpoint: Efficacy
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Project description:It has been proposed that endogenously formed N-nitroso compounds (NOCs) are partly responsible for the link between red meat consumption and colorectal cancer (CRC) risk. As nitrite has been indicated as one of the critical factors in the formation of endogenous NOCs, it is of high importance to replace or reduce the nitrite levels in meat. Therefore, the PHYTOME project was initiated (Phytochemicals to reduce nitrite in meat products; www.phytome.eu), an EU funded research project aiming to develop innovative meat products in which the food additive sodium nitrite (E251) has been replaced by natural compounds originating from fruits and vegetables. A human dietary intervention study was conducted in which healthy subjects consumed 300 grams of meat for two weeks, in subsequent order: normal processed red meat, white meat, and red processed meat with standard or reduced levels of nitrite and added phytochemicals. Consumption of standard-nitrite PHYTOME meat products leads to a significant reduction in Apparent Total N-nitroso Compounds (ATNC) levels in faecal water, a surrogate marker of endogenously formed NOCs, as compared to the consumption of conventional processed red meat products. A reduction of nitrite in the PHYTOME meat lowered these levels even further. In addition, DNA strand breaks induced in ex-vivo faecal water exposed Caco-2 cells and O6-methyl-guanine adducts levels in colonic DNA were significantly higher after consumption of normal processed red meat as compared to white meat intake. PHYTOME meat intake resulted in reduced levels of these genotoxic markers, however, these were not statistically significant. Whole genome gene expression analyses in colonic tissue identified differentially expressed genes and genes associated with ATNC, which are related to molecular pathways which may explain cancer risk initiation after intake of processed red meat and cancer risk prevention after intake of the PHYTOME meat. Together these results indicate that addition of natural extracts to conventional processed red meat products results in reduced endogenous formation of NOCs, and may therefore contribute to a reduced risk of CRC, which is mechanistically supported by gene expression analyses.
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