Abstract
Background: Identification of a peripheral biological marker might aid in identifying patients at high risk of attempting suicide and might help in effective early intervention.
Objective: In the present study, we extend the findings of our previous multidimensional proteomics study by examining the levels of plasma Apolipoprotein-AIV in patients diagnosed with major depression with and without suicidal ideation compared to age and gender-matched controls.
Methods: Using the mass spectrometry platform, we quantified the levels of plasma Apolipoprotein- AIV in patients with major depressive disorder with and without suicidal ideation compared to matched controls with isotope-labelled peptides-based quantitative proteomics approach.
Results: The targeted quantitative proteomics approach with isotope-labelled peptides showed that plasma Apolipoprotein-AIV was significantly downregulated in depressed patients having suicidal ideation 1.45 (CI:1.11-1.90) compared to those without suicidal ideation 0.88 (CI:0.77-1.003).
Conclusion: These findings extend our earlier observation of downregulation of plasma Apolipoprotein- AIV in patients with suicidal attempts to depressed patients with suicidal ideation. The consistent downregulation of plasma Apolipoprotein-AIV observed in both the proteomics studies suggests Apolipoprotein-AIV might be a plasma-based biomarker for suicidal behaviour.
Keywords: Apolipoprotein-AIV, plasma proteomics, suicidal ideation, quantitative proteomics, biomarker, endophenotypic.
Graphical Abstract
[http://dx.doi.org/10.1016/S0140-6736(12)60606-0] [PMID: 22726517]
[http://dx.doi.org/10.1038/tp.2011.6] [PMID: 21761009]
[http://dx.doi.org/10.1371/journal.pone.0084282] [PMID: 24465400]
[http://dx.doi.org/10.1016/j.jad.2007.04.008] [PMID: 17499856]
[http://dx.doi.org/10.1001/archpsyc.1994.03950010034005] [PMID: 7506517]
[http://dx.doi.org/10.1097/01.ypg.0000199442.75505.f7] [PMID: 16538180]
[http://dx.doi.org/10.1097/00041444-200010010-00003] [PMID: 10909123]
[http://dx.doi.org/10.4103/ijmr.IJMR_1842_17] [PMID: 31823918]
[http://dx.doi.org/10.1186/s12888-017-1559-9] [PMID: 29202737]
[http://dx.doi.org/10.1136/jnnp.23.1.56] [PMID: 14399272]
[http://dx.doi.org/10.1017/S0033291702006074] [PMID: 12214795]
[http://dx.doi.org/10.1016/j.ymeth.2004.08.018] [PMID: 15722223]
[http://dx.doi.org/10.1038/nprot.2010.196] [PMID: 21293459]
[http://dx.doi.org/10.1201/b12215-21] [PMID: 23035287]
[http://dx.doi.org/10.3389/fpsyt.2016.00158] [PMID: 27721799]
[http://dx.doi.org/10.1038/srep32882] [PMID: 27605454]
[http://dx.doi.org/10.1016/S0021-9258(18)89547-3] [PMID: 3918999]
[http://dx.doi.org/10.1111/j.1600-0447.1997.tb09622.x] [PMID: 9111854]
[http://dx.doi.org/10.1016/j.ajp.2017.11.023] [PMID: 29222984]
[http://dx.doi.org/10.1016/j.plefa.2021.102247]