Evaluation of a Hypertensive Rat Model Using Peripheral Blood Neutrophil Activity, Phagocytic Activity and Oxidized LDL Evaluation

Anticancer Res. 2018 Jul;38(7):4289-4294. doi: 10.21873/anticanres.12726.


Background/aim: A system is being developed that can be used to easily evaluate the health condition of an individual with the help of trace amounts of a blood sample by focusing on xenobiotics. The system is called "Multimodal homeostasis evaluation system" (measurement of neutrophil activity, phagocytic activity of phagocytes and quantification of oxidized LDL (OxLDL)). To elucidate the possibility of using this system as an evaluation system for the health condition of an individual, clearly explaining the changes in various diseases is essential. In this study, evaluations were carried out using hypertensive model animals.

Materials and methods: Spontaneously hypertensive model rats SHR/NCrlCrlj and control rats WKY/NCrlCrlj were raised for 10 weeks from 6 to 16 weeks of age and their blood pressure was measured over time. Blood neutrophil activity (superoxide anion (O2•-) generation and myeloperoxidase (MPO) activity) and phagocytic activity of phagocytes was measured by our developed apparatus (a simple prototype device under development). OxLDL was measured by an ELISA kit, and biochemical markers were measured using the blood sample.

Results: Compared to WKY rats of the control group, systolic blood pressure, diastolic blood pressure, and mean blood pressure of SHR rats increased significantly with age. In SHR rats, there was a significant elevation in O2•- generation and MPO activity of neutrophils, alanine aminotransferase and triglycerides of blood, while phagocytic activity, OxLDL, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, total cholesterol and total-bilirubin decreased.

Conclusion: In the hypertensive model, biochemical markers were found to have a relationship with O2•- generation, MPO activity, phagocytic activity of phagocytes, and OxLDL. This system is expected to be useful for clinical monitoring of hypertension diseases.

Keywords: Peripheral blood; neutrophil activity; oxidized LDL; phagocytic activity.

MeSH terms

  • Animals
  • Biomarkers / blood*
  • Disease Models, Animal
  • Hypertension / blood*
  • Lipoproteins, LDL / analysis*
  • Male
  • Neutrophils*
  • Phagocytosis
  • Rats
  • Rats, Inbred SHR


  • Biomarkers
  • Lipoproteins, LDL
  • oxidized low density lipoprotein