1-N-Acetylspermidine: occurrence in normal human serum

Area of Science:

• Biochemistry
• Analytical Chemistry
• Human Physiology

Background:

• Polyamines like spermidine are crucial in cellular processes.
• Acetylpolyamines are metabolites with potential biological roles.
• Quantification of acetylated polyamines in human serum is challenging.

Purpose of the Study:

• To quantify 1-N-acetylspermidine in normal human serum.
• To investigate the presence of 8-N-acetylspermidine in human serum.
• To establish analytical methods for acetylpolyamine detection.

Main Methods:

• Gas chromatography mass spectrometry (GC-MS) was employed.
• Derivatization using N-trifluoroacetylation was performed.
• Authentic standards of acetylspermidines were analyzed.

Main Results:

• 1-N-acetylspermidine was identified in human serum at concentrations of 0.008–0.5 nmol/mL.
• Levels of 1-N-acetylspermidine were approximately two orders of magnitude lower than spermidine.
• No detectable levels of 8-N-acetylspermidine were found in the serum.

Conclusions:

• 1-N-acetylspermidine is a detectable component of normal human serum.
• The concentration of 1-N-acetylspermidine is significantly lower than its parent compound, spermidine.
• The absence of 8-N-acetylspermidine suggests specific metabolic pathways or stability differences.