The activities of phosphohexose isomerase (EC. 5.3.1.9), isocitrate dehydrogenase (EC. 1.1.1.42) and lactate dehydrogenase (EC. 1.1.1.27) were measured in 14 normal and 21 tumorous mouse mammary tissue samples. Methods of tissue extraction and activity determination in this study employed equipment found in most clinical laboratories.For each of the three enzymes there was a statistically significant (p <.05) elevation of the tumor sample group's activities. The activities of the normal tissues were: PHI x = 9.6 and SD = 4.6, ICD x = 13.2 and SD = 5.3, and IDH x = 10.9 and SD = 5.3. The activities of the tumorous tissues were: PHI x = 55.2 and SD = 29.9, ICD x = 40.5 and SD = 23.8, and IDH x = 55.8 and SD = 31.4.Using values of 20, 27, and 21 for the upper limit of normal activity (x + 2SD) for PHI, ICD, and LDH respectively, the tissue samples can be divided into normal and tumorous groups with l00% sensitivity and 85% specificity.Ball State UniversityMuncie, IN 47306

Thesis (M.S.)--Rutgers University, 2009. / "Graduate Program in Microbiology and Molecular Genetics." Includes bibliographical references (p. 51-61).

Thesis (Ph. D.)--Case Western Reserve University, 2010. / [School of Medicine] Department of Pharmacology. Includes bibliographical references.

Changes in the plasma membrane phospholipid composition may alter the structure and/or fluidity and lead to a variety of changes in membrane functions. Dietary fats are known to influence the composition of lipids in the plasma membrane. The purpose of this investigation was to compare effects of dietary linoleic and stearic acid on the composition of the phospholipids in the plasma membranes of mammary tumors in A/St mice.Plasma membranes were isolated and lipids were extracted. Phospholipids were separated by thin-layer chromatography and identified by detection with molybdenum blue reagent. The Rf values and integration of optical densities were used to compare phospholipid composition in membranes of tumors from mice fed experimental diets. It appears that the amount of dietary fat, but not the type, affects the phospholipid distributions. The phosphatidylinositol was the phospholipid most affected, representing the smallest amount in membranes from tumors in mice fed the low fat diets. / Department of Biology

Prostaglandin E2 (PGE2), a byproduct of arachidonic acid metabolism, has been suspected to be involved in tumor promotion. It has been suggested that diet may modulate PGE2 level in organisms thus affecting the implantation and growth of the tumor tissue. PGE2 content was investigated in mice fed ad libitum four types of fatty acid diets: saturated fatty acid diets: a stearic acid and a palmitic acid, and polyunsaturated fatty acid diets: a low fat (safflower 1%) and a high fat diet (safflower 15%). Tumor cells were implanted subcutaneously in mice and harvested when tumors reached .05- 4g. The extracted PGE2 were derivatized and quantified by High Performance Liquid Chromatography (HPLC). The results showed that there is a negative correlation between the level of PGE2 and the size of the tumors. PGE2 level declined as the tumor grew. This suggests that during the early stage of growth the tumor requires higher level of PGE2 to boost its growth. As the tumor becomes more adapted to its environment, it no longer depends on PGE2 to survive. Diet was also seen to be important in tumor suppression. Saturated fatty acid diet (SA-1) showed a suppressive effect on tumor growth. A visual comparison showed that polyunsaturated high fat diet produced more PGE2 than saturated fatty acid. This high level of PGE2 correlate with the highest tumor weights obtained in the Polyunsaturated high fat diet group. / Department of Biology

Thesis (Ph.D.)--McMaster University, 2003. / Advisor: W. J. Muller. Includes bibliographical references (leaves 259-282). Also available via World Wide Web.

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv., 2002. / Härtill 5 uppsatser.

Diss. (sammanfattning) Stockholm : Karol. inst., 2004. / Härtill 4 uppsatser.

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv., 2004. / Härtill 5 uppsatser.

Thesis (Ph.D. in Molecular Biology) -- University of Colorado at Denver and Health Sciences Center, 2006. / Typescript. Includes bibliographical references (leaves 194-209). Free to UCD Anschutz Medical Campus. Online version available via ProQuest Digital Dissertations;