Effect of Heparin on the Expressions of Serum Intercellular Adhesion Molecule-1 and Hippocampus S100β Protein after Cardiopulmonary Resuscitation in Rabbits

Abstract

Objective Use heparin during cardiac arrest (CA) in rabbits and observe the serum intercellular adhesion molecule-1 (ICAM-1) and hippocampal S100β protein expressions after cardiopulmonary resuscitation (CPR). Methods Thirty-two New Zealand rabbits were randomly divided into, Group I, control group; Group II, saline group; Group III, heparin group. Each animal underwent continuous hemodynamic monitoring including mean arterial pressure (MBP), heart rate (HR), and the end-tidal carbon dioxide partial pressure (PetCO2). Twenty-four hours after resuscitation, serum and hippocampal neurons were collected from all animals. Enzyme linked immunosorbent assay was used to detect serum ICAM-1 and immunohistochemistry to detect the S100β protein in hippocampal neurons. According to the rate of positive cells, each hippocampal specimen was categorized into four expression levels. Results The differences in the serum ICAM-1 concentration in the three groups were statistically significant. The expression of S100β protein in the hippocampus showed eight cases in group I at level 1 and none in groups II and III. There was 1 case in group II and 7 cases in group III at level 2; five cases in group II and 2 cases in group III at level 3; 2 cases in group II and 1 case in group III at level 4. The expression strength of S100β protein in the three groups differed significantly (P < 0.05). Conclusions Heparin therapy can reduce the expression of serum ICAM-1 and S100β protein in hippocampal neurons during CPR. It is possible that heparin can have a positive effect on brain protection during CPR.