PMID- 8288872 OWN - NLM STAT- MEDLINE DCOM- 19940218 LR - 20190723 IS - 0022-1759 (Print) IS - 0022-1759 (Linking) VI - 166 IP - 2 DP - 1993 Dec 3 TI - Measurement of eosinophil cationic protein (ECP) and eosinophil protein X/eosinophil derived neurotoxin (EPX/EDN). Time and temperature dependent spontaneous release in vitro demands standardized sample processing. PG - 183-90 AB - The measurement of eosinophil derived proteins such as eosinophil cationic protein (ECP) and eosinophil protein X/eosinophil derived neurotoxin (EPX/EDN) in biological fluids may be a useful indicator of eosinophil activity in ongoing inflammatory processes. This study was performed on blood samples and illustrates that serum values of ECP in particular, but also of EPX, are mainly a result of spontaneous release during the processing of blood samples. In the presence of divalent cations (Ca2+ and Mg2+), the amount of released ECP and EPX is dependent upon the incubation temperature and the time before centrifugation and recovery of serum. Moreover, the utensils used for blood sampling may influence the serum levels of ECP and EPX. Thus, standardized sample processing is of paramount importance if the results are to have optimal diagnostic or clinical value. FAU - Reimert, C M AU - Reimert CM AD - Laboratory of Medical Allergology, National University Hospital, Copenhagen, Denmark. FAU - Poulsen, L K AU - Poulsen LK FAU - Bindslev-Jensen, C AU - Bindslev-Jensen C FAU - Kharazmi, A AU - Kharazmi A FAU - Bendtzen, K AU - Bendtzen K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - J Immunol Methods JT - Journal of immunological methods JID - 1305440 RN - 0 (Blood Proteins) RN - 0 (Eosinophil Granule Proteins) RN - 0 (Neurotoxins) RN - 9G34HU7RV0 (Edetic Acid) RN - EC 3.1.- (Eosinophil-Derived Neurotoxin) RN - EC 3.1.- (Ribonucleases) RN - SY7Q814VUP (Calcium) SB - IM MH - Blood Proteins/*analysis/metabolism MH - Blood Specimen Collection MH - Calcium/blood MH - Edetic Acid/metabolism MH - Eosinophil Granule Proteins MH - Eosinophil-Derived Neurotoxin MH - Hemostatic Techniques MH - Humans MH - Neurotoxins/*blood/metabolism MH - *Ribonucleases MH - Temperature MH - Time Factors EDAT- 1993/12/03 00:00 MHDA- 1993/12/03 00:01 CRDT- 1993/12/03 00:00 PHST- 1993/12/03 00:00 [pubmed] PHST- 1993/12/03 00:01 [medline] PHST- 1993/12/03 00:00 [entrez] AID - 0022-1759(93)90359-F [pii] AID - 10.1016/0022-1759(93)90359-f [doi] PST - ppublish SO - J Immunol Methods. 1993 Dec 3;166(2):183-90. doi: 10.1016/0022-1759(93)90359-f.