alexa Determination of 4-Hydroxy-2-Nonenal in Plasma | OMICS International
ISSN : 2153-2435
Pharmaceutica Analytica Acta

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Determination of 4-Hydroxy-2-Nonenal in Plasma

Hideharu Shintani*

Chuo University,School of Science,1-13-27, Kasuga Bunkyo 112-0003 Tokyo,Japan

*Corresponding Author:
Hideharu Shintani
Chuo University, School of Science
1-13-27, Kasuga Bunkyo 112-0003 Tokyo, Japan
Tel: +81425922336
E-mail: [email protected]

Received date: June 15, 2013; Accepted date: June 24, 2013; Published date: June 26, 2013

Citation: Shintani H (2013) Determination of 4-Hydroxy-2-Nonenal in Plasma. Pharm Anal Acta 4:253. doi: 10.4172/2153-2435.1000253

Copyright: © 2013 Shintani H. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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4-Hydroxy-2-nonenal; n-6 poly-unsaturated fatty acids; TLC; HPLC; GC-MS


4-Hydroxy-2-nonenal (HNE) is a peroxidation product of n-6 poly-unsaturated fatty acids, which probably requires traces of catalytic iron for its formation.

Spectrophotometric, thin-layer chromatographic (TLC), and high-performance liquid chromatographic (HPLC) techniques for determination of HNE in fluids and cellular preparations are covered in detail elsewhere [1,2]. Here we describe a GC-MS method for use with plasma. HNE reacts with proteins to form stable complexes. This technique measures only ‘free’ HNE in plasma [3].


1. Place freshly taken plasma (1.0 mL), BHT (2.0 mM, 0.010 mL), and nonanoic acid (internal standard; 0.006 mL) in new clean glass tubes.

2. Mix and divide into equal parts ‘A’ and ‘B’.

3. Add chloroform-methanol (2: 1 v/v, 4.0 mL) and NaCI (0.15 M, 0.4 mL) to each tube.

4. Purge with oxygen-free nitrogen for 2 min, cap, and vortex mix for 30 s.

5. Centrifuge at 5,000 rpm for 6 min at 4°C.

6. Remove lower (chloroform) layer, and store at 4°C Ä, under N2.

7. Extract the remaining (upper) residue with chloroformmethanol (2:1 v/v 2 mL) by vortex mixing for 30 s.

8. Centrifuge at 5,000 rpm for 6 min at 4°C.

9. Collect the lower phase and combine with previous extract.

10. Evaporate combined extracts to dryness under N2 at 25°C.

11. Store at -20°C for less than 1 week.

12. Derivatize the samples:

a. Add dry acetone (0.2 mL) and bis(trimethylsilyl) trifluoroacetamide (BSTFA) containing 1% (w/v) trimethylchlorosilane (0.2 mL) to the dried extracts.

b. Cap tubes and leave for 60 min at 25°C.

c. Centrifuge at 6,000 rpm for 5 min to deposit residues.

13. Analyse by GC-MS.


Selected ions characteristic of HNE-TMS are m/z 129, m/z 157, and m/z 199; for nonanoic acid-TMS the ions are m/z 117, m/z 129, and m/z 215. Quantitation is achieved by preparing a standard curve relating to m/z 117 for nonanoic acid-TMS and m/z 157 for HNE-TMS.


A typical mass spectrum is shown in Figure 1.


Figure 1: (a) The structures of HNE and its TMS derivative and probable mechanisms for formation both of the ions used for selected-ion monitoring and of the molecular ion. (b) The total-ion chromatogram and mass spectrum of the HNE-TMS standard displayed clearly show the selected ions and the molecular ion. The mass to charge ratio (m/z) is given in atomic mass units(emu).


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