Posted 19 August 2007 - 04:18 AM
heres a random abstract about nutrigenomics
: Acta Vet Hung. 2007 Jun;55(2):229-39.Links
Veterinary aspects and perspectives of nutrigenomics: a critical review.Fekete SG, Brown DL.
Institute of Animal Breeding, Nutrition and Laboratory Animal Science, Faculty of Veterinary Science, Szent István University, H-1400 Budapest, P.O. Box 2, Hungary. Fekete.Sandor@aotk.szie.hu
Nutrigenomics examines nutrient-gene interactions on a genome-wide scale. Increased dietary fat or higher non-esterified fatty acids (NEFA) from starvation-induced mobilisation may enhance hepatic oxidation and decrease esterification of fatty acids by reducing the expression of the fatty acid synthase gene. The key factors are the peroxisome proliferator-activated receptors (PPARs). Dietary carbohydrates--both independently and through insulin effect--influence the transcription of the fatty acid synthase gene. Oleic acid or n-3 fatty acids downregulate the expression of leptin, fatty acid synthase and lipoprotein lipase in retroperitoneal adipose tissue. Protein-rich diets entail a shortage of mRNA necessary for expression of the fatty acid synthase gene in the adipocytes. Conjugated linoleic acids (CLAs) are activators of PPAR and also induce apoptosis in adipocytes. Altered rumen microflora produces CLAs that are efficient inhibitors of milk fat synthesis in the mammary gland ('biohydrogenation theory'). Oral zinc or cadmium application enhances transcription rate in the metallothionein gene. Supplemental CLA in pig diets was found to decrease feed intake and body fat by activating PPARgamma-responsive genes in the adipose tissue. To prevent obesity and type II diabetes, the direct modulation of gene expression by nutrients is also possible. Nutrigenomics may help in the early diagnosis of genetically determined metabolic disorders and in designing individualised diets for companion animals.
I just found out that apolipoprotein a- I gene expression could be regulated by ppar alpha.
: Eur J Pharmacol. 2006 Dec 3;551(1-3):80-6. Epub 2006 Sep 6. Links
Anti-hyperlipidemic properties of CM108 (a flavone derivative) in vitro and in vivo.Guo L, Hu WR, Lian JH, Ji W, Deng T, Qian M, Gong BQ.
State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China. firstname.lastname@example.org
Peroxisome proliferator-activated receptors (PPARs) and liver X receptor alpha are ligand-activated transcription factors that belong to nuclear receptors superfamily and are involved in the regulation of lipid metabolism. PPAR, especially PPAR-alpha, PPAR-gamma agonists and liver X receptor alpha agonists can regulate the expression or biosynthesis of some factors involved in the formation and function of HDL, such as apolipoprotein (apo) A-I and ATP binding cassette transporter A1 (ABCA1). It is well known that HDL plays an important role in the treatment of hyperlipidemia as the carrier of reverse cholesterol transport. In the present study, the anti-hyperlipidemic properties of CM108, a derivative of flavone, 9-Hydroxy-2-mercapto-6-phenyl-2-thioxo-1,3,5-trioxa-2lambda(5)-phospha-cyclopenta[b]naphthalen-8-one, were studied. Through the transactivation assays of in vitro study, it was discovered that CM108 could activate PPAR-alpha PPAR-gamma and liver X receptor alpha at 40-150 microg/ml, which subsequently resulted in activating ABCA1 promoter and enhancing apoA-I and apoA-II production, whereas reducing apoC-III production significantly. Furthermore, after in vivo study that the hyperlipidemic rats were treated with CM108 for 4 weeks, a significant increase was found in HDL cholesterol levels (26.7%, P<0.05) and a significant decrease was also noticed in triglyceride levels (26.3%, P<0.01) at 100 mg/kg CM108 group compared with that of control animals. Meanwhile, the atherogenicity index, represented by total cholesterol/HDL ratio, was significantly reduced (P<0.01). In conclusion, CM108 can effectively elevate HDL levels and lower triglyceride levels in hyperlipidemic rats maybe by regulating a series of genes, receptors and proteins related to HDL.
since it is known that people with acne have low levels of apolipoprotein a-I sseing now its relationship to ppar alpha is also a good thing. so far ppar alpha could possibly improve two big opponents in acne, sebum production and apolipoprotein a-I or so it seems.