Abstract

CASTELLANOS CASTELLANOS, Yuly Andrea et al. Pre-analytical variables involving the quantification of serum C-reactive protein and IL-6 in preeclamptic primiparas and healthy control. Rev. Univ. Ind. Santander. Salud [online]. 2012, vol.44, n.3, pp.25-30. ISSN 0121-0807.

Introduction: Preeclampsia is associated with an increase in the inflammatory response; two molecules associated with this process are the CRP and IL-6. In the detection of serum levels of these molecules, there are preanalytical factors that can modify its concentration. This study seeks to establish whether there is variability in levels of IL-6 and CRP according to the times of separation and storage temperature on samples of preeclamptic primiparas and healthy controls. Methods: Peripheral blood was drawn using two tubes (A and B) of 7 ml without anticoagulant. Tube A was cooled to 4 °C for 7 days, at the end was centrifuged and stored at -70 °C. Tube B was centrifuged immediately and fractionated, the first fraction (B1) was stored at -70 ° C (reference tube), while others were refrigerated at 4 ° C and frozen at -70 ° C after 15 days, one, two and three months. Finally, we quantified the serum levels of IL-6 and CRP. Results: 75 samples were quantified for CRP and 58 for IL-6. Differences in CRP concentrations found given by the delay of centrifugation after 7 days of storage at 4 °C. With regarding to IL 6, there were no significant differences. Conclusion: CRP and IL-6, may vary by exposure to preanalytical variables. In this study corroborate that serum CRP levels are significantly altered if the sample is centrifuged without be chilled; for the other variables analyzed showed no change in the quantification. Salud UIS 2012; 44 (3): 25-30

Keywords : Pre-analytical variables; Freezing Delta; Interleukin-6; C Reactive Protein; Preeclampsia.

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