Two enzyme-linked immunosorbent assay (ELISA) systems for N1,N8-diacetylspermidine and N1,N12-diacetylspermine using monoclonal antibodies.
We obtained monoclonal antibodies against N(1),N(12)-diacetylspermine (DiAcSpm) and N(1),N(8)-diacetylspermidine (DiAcSpd), and developed two systems of competitive ELISA that utilize the antibodies and a common enzyme-labeled antigen to measure these di-acetylpolyamines. Cross-reactions with N(1)-acetylspermidine in the assay of DiAcSpm and with N8-acetylspermidine in the assay of DiAcSpd were as low as 0.26 and 0.6%, respectively, and were judged to be insignificant in clinical use for measuring urinary diacetylpolyamines. These assays were used to assess diurnal variations in diacetylpolyamine excretion in urine to show that the excretion of diacetylpolyamines after normalization for the concentration of creatinine is stable over a day with only minimal diurnal variation.
Hamaoki
Masaru
M
Immunology Laboratory, Diagnostics Department, Yamasa Corporation, Araoi-cho, Choshi, Chiba 288-0056. hamaoki@yamasa.com
Hiramatsu
Kyoko
K
Suzuki
Setsuo
S
Nagata
Atsuo
A
Kawakita
Masao
M
D000911:Antibodies, Monoclonal / Q000276:immunology; D000917:Antibody Formation; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D006801:Humans; D013095:Spermidine / Q000031:analogs & derivatives* / Q000032:analysis / Q000276:immunology*; D013096:Spermine / Q000031:analogs & derivatives* / Q000032:analysis / Q000276:immunology*
D000911:Antibodies, Monoclonal; C093909:N(1),N(8)-diacetylspermidine; D013096:Spermine; C029453:N',N''-diacetylspermine; D013095:Spermidine