Chemistry:Malondialdehyde

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Malondialdehyde
Malondialdehyd.svg
Malondialdehyde Enol-Form.png
Malondialdehyde Keto-Form.png
Names
IUPAC name
propanedial
Other names
Malonic aldehyde; Malonodialdehyde; Propanedial; 1,3-Propanedial ; Malonaldehyde ; Malonyldialdehyde
Identifiers
3D model (JSmol)
Abbreviations MDA
ChemSpider
KEGG
UNII
Properties
C3H4O2
Molar mass 72.063 g·mol−1
Appearance Needle-like solid[1]
Density 0.991 g/mL
Melting point 72 °C (162 °F; 345 K)
Boiling point 108 °C (226 °F; 381 K)
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)
 none[1]
REL (Recommended)
 Ca[1]
IDLH (Immediate danger)
 Ca [N.D.][1]
Related compounds
Related alkenals
 Glucic acid

4-Hydroxynonenal

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Tracking categories (test):

Malondialdehyde belong to the class of β-dicarbonyls. A colorless liquid, malondialdehyde is a highly reactive compound that occurs as the enol.[2] It is a physiological metabolite, and a marker for oxidative stress.

Structure and synthesis

Malondialdehyde mainly exists as its enol, hydroxyacrolein:[2]

CH2(CHO)2 → HOC(H)=CH-CHO

In organic solvents, the cis-isomer is favored, whereas in water the trans-isomer predominates. The equilibrium is rapid and is inconsequential for many purposes.

In the laboratory it can be generated in situ by hydrolysis of its acetal 1,1,3,3-tetramethoxypropane, which is commercially available and shelf-stable, unlike malondialdehyde.[2] Malondialdehyde is easily deprotonated to give the sodium salt of the enolate (m.p. 245 °C).

Biosynthesis and reactivity

Malondialdehyde results from lipid peroxidation of polyunsaturated fatty acids.[3] It is a prominent product in thromboxane A2 synthesis wherein cyclooxygenase 1 or cycloxygenase 2 metabolizes arachidonic acid to prostaglandin H2 by platelets and a wide array of other cell types and tissues. This product is further metabolized by thromboxane synthase to thromboxane A2, 12-hydroxyheptadecatrienoic acid, and malonyldialdehyde. Alternatively, it may rearrange non-enzymatically to a mixture of 8-cis and 8-trans isomers of 12-hydroxyeicosaheptaenoic acid plus malonyldialdehyde (see 12-Hydroxyheptadecatrienoic acid).[4] The degree of lipid peroxidation can be estimated by the amount of malondialdehyde in tissues.[3]

Reactive oxygen species degrade polyunsaturated lipids, forming malondialdehyde.[5] This compound is a reactive aldehyde and is one of the many reactive electrophile species that cause toxic stress in cells and form covalent protein adducts referred to as "advanced lipoxidation end-products" (ALE), in analogy to advanced glycation end-products (AGE).[6] The production of this aldehyde is used as a biomarker to measure the level of oxidative stress in an organism.[7][8]

Malondialdehyde reacts with deoxyadenosine and deoxyguanosine in DNA, forming DNA adducts, the primary one being M1G, which is mutagenic.[9] The guanidine group of arginine residues condense with malondialdehyde to give 2-aminopyrimidines.

Human ALDH1A1 aldehyde dehydrogenase is capable of oxidizing malondialdehyde.

Analysis

Malondialdehyde and other thiobarbituric reactive substances (TBARS) condense with two equivalents of thiobarbituric acid to give a fluorescent red derivative that can be assayed spectrophotometrically.[2][10] 1-Methyl-2-phenylindole is an alternative more selective reagent.[2]

Hazards and pathology

Malondialdehyde is reactive and potentially mutagenic.[11] It has been found in heated edible oils such as sunflower and palm oils.[12]

Corneas of patients with keratoconus and bullous keratopathy have increased levels of malondialdehyde, according to one study.[13] MDA also can be found in tissue sections of joints from patients with osteoarthritis.[14]

Levels of malondialdehyde can be also considered (as a marker of lipid peroxidation) to assess the membrane damage in spermatozoa; this is crucial because oxidative stress affects sperm function by altering membrane fluidity, permeability and impairing sperm functional competence.[15]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 NIOSH Pocket Guide to Chemical Hazards. "#0377". National Institute for Occupational Safety and Health (NIOSH). https://www.cdc.gov/niosh/npg/npgd0377.html. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 V. Nair, C. L. O'Neil, P. G. Wang "Malondialdehyde", Encyclopedia of Reagents for Organic Synthesis, 2008, John Wiley & Sons, New York. doi:10.1002/047084289X.rm013.pub2 Article Online Posting Date: March 14, 2008
  3. ↑ 3.0 3.1 Davey MW1, Stals E, Panis B, Keulemans J, Swennen RL (2005). "High-Throughput Determination of Malondialdehyde in Plant Tissues". Analytical Biochemistry 347 (2): 201–207. doi:10.1016/j.ab.2005.09.041. PMID 16289006. 
  4. ↑ Rouzer, Carol A.; Marnett, Lawrence J. (2003). "Mechanism of Free Radical Oxygenation of Polyunsaturated Fatty Acids by Cyclooxygenases". Chemical Reviews 103 (6): 2239–2304. doi:10.1021/cr000068x. PMID 12797830. 
  5. ↑ "Letter: A suggested mechanism for the production of malondialdehyde during the autoxidation of polyunsaturated fatty acids. Nonenzymatic production of prostaglandin endoperoxides during autoxidation". J. Org. Chem. 40 (24): 3615–7. 1975. doi:10.1021/jo00912a038. PMID 1185332. 
  6. ↑ "Reactive electrophile species". Curr. Opin. Plant Biol. 10 (4): 380–6. 2007. doi:10.1016/j.pbi.2007.04.019. PMID 17646124. 
  7. ↑ "Measurement of lipid peroxidation". Free Radic. Res. 28 (6): 659–71. 1998. doi:10.3109/10715769809065821. PMID 9736317. 
  8. ↑ "A review of recent studies on malondialdehyde as toxic molecule and biological marker of oxidative stress". Nutr Metab Cardiovasc Dis 15 (4): 316–28. 2005. doi:10.1016/j.numecd.2005.05.003. PMID 16054557. 
  9. ↑ Marnett LJ (1999). "Lipid peroxidation-DNA damage by malondialdehyde". Mutat. Res. 424 (1–2): 83–95. doi:10.1016/S0027-5107(99)00010-X. PMID 10064852. 
  10. ↑ "Thiobarbituric acid reactive substances (TBARS) Assay". http://www.amdcc.org/shared/showFile.aspx?doctypeid=3&docid=33. 
  11. ↑ Hartman PE, Putative mutagens and carcinogens in foods. IV. Malonaldehyde (malondialdehyde) Environ Mutagen. 1983;5(4):603-7
  12. ↑ Dourerdjou, P.; Koner, B. C. (2008), Effect of Different Cooking Vessels on Heat-Induced Lipid Peroxidation of Different Edible Oils" Journal of Food Biochemistry, 32: 740–751. doi:10.1111/j.1745-4514.2008.00195.x
  13. ↑ "Evidence of oxidative stress in human corneal diseases". J. Histochem. Cytochem. 50 (3): 341–51. March 2002. doi:10.1177/002215540205000306. PMID 11850437. 
  14. ↑ "Glucosamine prevents in vitro collagen degradation in chondrocytes by inhibiting advanced lipoxidation reactions and protein oxidation". Arthritis Research & Therapy 9 (4): R76. 2007. doi:10.1186/ar2274. PMID 17686167. 
  15. ↑ Collodel, G.; Moretti, E.; Micheli, L.; Menchiari, A.; Moltoni, L.; Cerretani, D. (March 2015). "Semen characteristics and malondialdehyde levels in men with different reproductive problems" (in en). Andrology 3 (2): 280–286. doi:10.1111/andr.297. PMID 25331426. 



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