The purpose of this study is to test whether or not organic foods have more health benefits and are safer than conventional foods. The word organic refers to how farmers grow and process agricultural products. Farmers use nonconventional methods to fertilize, control weeds and to prevent disease in livestock. This study included seventeen studies in humans which carefully studied the biomarker and nutrient levels in serum, breast milk, semen and urine. The participants involved in this study were tested for pesticide levels. Pesticides can be absorbed into fruits and vegetables, and leave trace residues. Foods were tested for pesticide levels as well as bacterial contamination and Escherichia Coli contamination. The study shows that eating organic foods in place of conventional foods lacks strong evidence that organic foods are significantly more nutritional than the conventional foods. The study did however find that consumption of the organic foods may help reduce exposure to antibiotic resistant bacteria as well as pesticide residuals. I was shocked by the results of this study. I believe the majority of people have always believed that organic foods are far healthier than conventional foods. Organic foods generally cost 20% more than the nonorganic varieties. A good question to ask yourself is whether or not it is worth it to pay the extra money for organic foods. Although the organic foods do not provide the extra nutritional punch as once believed, I feel it is worth paying the extra money for these items. Any reduction in exposure to harmful pesticides may be beneficial to your long term health. Pesticides have been proven to cause skin irritation, eye irritation, nerve system damage as well as certain cancers and hormone disruption. The authors of this study did a great job identifying the benefits of consuming organic foods. I believe this is an area that will continue to be researched as we continue to learn more about the effects of the foods we put in our bodies. Christain Nordqvist (2012. September 5). â€œOrganic Food Has No Benefits Over Conventional Food, Says Study.â€™ Medical News Today. Retrieved from http://www.medicalnewstoday.com/articles249848.php.
Cellular pathology critical review assignment - Essay Example ules A and B, which present viral peptides to the cytotoxic T-lymphocytes, thereby avoiding their clearance from the body which leads to establishment of infection and later malignancy. For the in vitro study immortalized human keratinocyte cell line HaCaT, primary bovine PalF cells and NIH 3T3 cell lines which expressed the HPV-16 E5 protein was used and some NIH 3T3 expressed HPV-6 E5. After subsequent culture, suitable immunological assays were carried out to detect the presence and localization of the MHC class I molecules in these cells. While in the control cell lines MHC molecules were localized both in the cell surface and within the GA, in the HPV-16 E5 expressing cells the molecules were found exclusively in the GA. The study also showed that HPV-16 E5 did not affect the synthesis of MHC molecules unlike BPV E5 and that the expression of the E5 protein did no affect the transporter protein responsible for the transport of MHC molecules. To determine the effect of interferon, all the cell lines were treated with interferon Î², which resulted in all the cell lines having similar levels of MHC molecules and also the molecules were found on the cell surface in the E5 expressing cell lines thus proving that the inhibition on transport of MHC molecules is reversed upon treatment with interferon. The study also noted that E5 did not down regulate the expression of HLA-C and E, involved in inhibiting NK cell-mediated lysis. The two most striking limitations observed is: the study was carried out in vitro and in vivo reproducibility needs to be ascertained and secondly, the detection of the E5 protein was carried out by RT-PCR rather simpler techniques. The two major strengths include: this is the first paper to show the immune evasion mechanism by the HPV E5 protein and the cell lines used are a good model for understanding the mechanism and finally, the study explores the gene level expressions involved in the down regulation process of the MHC molecules. In
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