title: Angiogenesis in the New Zealand obese mouse model fed with high fat diet.
abstract: BACKGROUND
  Obesity and its complications lead to vascular injury, atherosclerosis, diabetes and pathological angiogenesis. One of the models to study the obesity and its entanglements is the New Zealand Obese mice model. Aim of this study was to check the effect of high fat diet on changes in biochemical parameters as well as on process of angiogenesis in NZO mice.
  
  
  METHODS
  NZO mice were fed with standard (ST) or high fat (HF) diet for seven weeks. Body weight and serum biochemical parameters were monitored. The PECAM1 positive vessel-like structures immunostaining, as well as the gene expression of the matrigel penetrating cells by microarray (confirmed by real-time PCR method) were analyzed.
  
  
  RESULTS
  Mice fed with HF diet developed obesity. Number of newly created vessels with lumen was correlated with hyperglycemia and animal weight gain. The number of PECAM1 positive cells in matrigel tended to increase during HF diet. Microarray results revealed changes in gene expression (activation of the oxidative stress and insulin resistance, inhibition of apoptosis and cell differentiation), however without markers of endothelial cell network maturation.
  
  
  CONCLUSIONS
  Observed changes in the NZO mice on HF diet argue for the hyperglycemia related activation of angiogenesis, leading to the formation of pathological, immature network.
authors.affiliation: Department of Clinical Biochemistry, Collegium Medicum, Jagiellonian University, Cracow, Poland. abalwierz@cm-uj.krakow.pl
authors.forename: Adriana
authors.initials: A
authors.lastname: Balwierz
authors.forename: Anna
authors.initials: A
authors.lastname: Polus
authors.forename: Urszula
authors.initials: U
authors.lastname: Razny
authors.forename: Lukasz
authors.initials: L
authors.lastname: Wator
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Dyduch
authors.forename: Romana
authors.initials: R
authors.lastname: Tomaszewska
authors.forename: Stephan
authors.initials: S
authors.lastname: Scherneck
authors.forename: Hans
authors.initials: H
authors.lastname: Joost
authors.forename: Aldona
authors.initials: A
authors.lastname: Dembinska-Kiec