Extraction of oxytocin and arginine-vasopressin from serum and plasma for radioimmunoassay and surface-enhanced laser desorption-ionization time-of-flight mass spectrometry |
| |
Authors: | Cool David R DeBrosse David |
| |
Affiliation: | Department of Pharmacology and Toxicology, Wright State University, 3640 Colonel Glenn Hwy., PO Box 927, Dayton, OH 45435, USA. david.cool@wright.edu |
| |
Abstract: | Oxytocin and arginine-vasopressin (AVP) are secreted into the blood in low concentrations. To analyze these peptides, we investigated two common extraction procedures, acetone-ether precipitation and C(18)-SepPak columns. Recovery from both procedures approached 70-80% of the spiked amount, though the SepPak columns were more efficient. C(18)-SepPak columns were used to sequentially separate oxytocin from AVP by eluting oxytocin first with 98% acetone followed by elution of AVP with 80% acetonitrile. Surface-enhanced laser desorption-ionization time-of-flight mass spectrometry (SELDI-TOF MS) was used to analyze oxytocin and AVP extracted with C(18)-SepPak columns from an autistic patient's plasma sample. We conclude that C(18)-SepPaks provide more consistent and efficient peptide extraction from serum or plasma that augments both quantitative and qualitative analysis by radioimmunoassay and SELDI-TOF MS. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|