Abstract
Background: Several human diseases like Parkinson’s, Alzheimer’s disease, and systemic amyloidosis are associated with the misfolding and aggregation of protein molecules.
Objective: The present study demonstrated the comparison of 4-methyl coumarin and 4-methylthiocoumarin derivative for their anti-amyloidogenic and disaggregation activities. The hen egg-white lysozyme is used as a model system to study protein aggregation and disaggregation under in vitro conditions.
Methods: Techniques used in the study were Thioflavin T fluorescence assay, intrinsic fluorescence assay, circular dichroism, transmission electron microscopy, and molecular dynamics.
Results: Fifteen compounds were screened for their anti-amyloidogenic and disaggregation potential. Six compounds significantly inhibited the fibril formation, whereas ten compounds showed disaggregation property of pre-formed fibrils. Under in vitro conditions, the compound C3 and C7 showed significant inhibition of fibril formation in a concentration-dependent manner as compared to control. C3 and C7 demonstrated 93% and 76% inhibition of fibril formation, respectively. Furthermore, C3 and C7 exhibited 83% and 76% disaggregation activity, respectively, of pre-formed HEWL fibrils at their highest concentration. These anti-amyloidogenic and disaggregation potential of C3 and C7 were validated by intrinsic fluorescence, CD, molecular dynamics, and TEM study.
Discussion: 4-methylthiocoumarins derivatives have shown better anti-amyloidogenic activity as compared to 4-methylcoumarin derivatives for both amyloid formation as well as disaggregation of preformed amyloid fibrils. Structurally, the derivatives of 4-methylthiocoumarins (C3 and C7) contain thio group on 2nd position that might be responsible for anti-amyloidogenic activity as compared to 4- methylcoumarin derivatives (C2 and C4).
Conclusion: C3 and C7 are novel 4-methylthiocoumarin derivatives that can be used as a lead for alleviation and symptoms associated with protein aggregation disorders.
Keywords: HEWL, 4-methylcoumarin, 4-methylthiocoumarin, anti-amyloidogenic activity, amyloidosis, amyloid fibril.
Graphical Abstract
[http://dx.doi.org/10.1371/journal.pone.0142095] [PMID: 26571264]
[http://dx.doi.org/10.1038/srep26759] [PMID: 27230476]
[http://dx.doi.org/10.1042/BSR20160101] [PMID: 27512096]
[http://dx.doi.org/10.1016/j.ijbiomac.2017.05.130] [PMID: 28545969]
[http://dx.doi.org/10.1039/c3sm51671g] [PMID: 26029778]
[http://dx.doi.org/10.1038/srep12052] [PMID: 26169912]
[http://dx.doi.org/10.1016/j.jmb.2011.12.062] [PMID: 22244855]
[http://dx.doi.org/10.2174/1389557516666160801094919] [PMID: 27488585]
[http://dx.doi.org/10.1016/j.ijbiomac.2017.06.006] [PMID: 28601645]
[http://dx.doi.org/10.1016/j.cbi.2016.05.001] [PMID: 27174134]
[http://dx.doi.org/10.1080/07391102.2018.1465853] [PMID: 29663860]
[http://dx.doi.org/10.1021/jm990197+] [PMID: 10543877]
[http://dx.doi.org/10.1016/j.cbi.2008.10.060] [PMID: 19061872]
[PMID: 13884474]
[http://dx.doi.org/10.1007/s11094-019-01978-1]
[http://dx.doi.org/10.1016/S0968-0896(98)00043-1] [PMID: 9681149]
[http://dx.doi.org/10.3797/scipharm.0805-08]
[http://dx.doi.org/10.1007/s13738-017-1175-0]
[http://dx.doi.org/10.1385/CBB:44:3:549] [PMID: 16679543]
[http://dx.doi.org/10.1371/journal.pone.0187841] [PMID: 29131828]
[http://dx.doi.org/10.1016/j.ijbiomac.2017.01.110] [PMID: 28137461]
[http://dx.doi.org/10.1021/jf803377n] [PMID: 19035658]
[http://dx.doi.org/10.1021/bp060353n] [PMID: 17492832]
[http://dx.doi.org/10.1016/0022-2836(74)90598-1] [PMID: 4856347]
[http://dx.doi.org/10.1021/jp003919d]
[http://dx.doi.org/10.1093/bioinformatics/btp691] [PMID: 20019059]
[http://dx.doi.org/10.1007/s10822-007-9133-z] [PMID: 17899391]
[http://dx.doi.org/10.1021/ci100015j] [PMID: 20373803]
[http://dx.doi.org/10.1021/jm0306430] [PMID: 15027865]
[http://dx.doi.org/10.1109/SC.2006.54]
[http://dx.doi.org/10.1063/1.445869]
[http://dx.doi.org/10.1063/1.463137]
[http://dx.doi.org/10.1063/1.463940]
[http://dx.doi.org/10.1063/1.467468]
[http://dx.doi.org/10.1063/1.464397]
[http://dx.doi.org/10.1038/srep42717] [PMID: 28256516]
[http://dx.doi.org/10.3390/biom9020065] [PMID: 30769878]
[http://dx.doi.org/10.4161/pri.2.3.7488] [PMID: 19158505]
[http://dx.doi.org/10.1016/j.colsurfb.2018.03.010] [PMID: 29550545]
[http://dx.doi.org/10.1016/j.bmc.2011.03.010] [PMID: 21458277]
[http://dx.doi.org/10.1038/nm0295-143] [PMID: 7585011]
[http://dx.doi.org/10.1016/j.ejmech.2018.11.017] [PMID: 30496988]
[http://dx.doi.org/10.1016/j.ijbiomac.2017.03.107] [PMID: 28341174]
[http://dx.doi.org/10.4155/fmc-2019-0106] [PMID: 31838895]
[http://dx.doi.org/10.1016/j.ijbiomac.2015.03.069] [PMID: 25863156]
[http://dx.doi.org/10.1016/j.jlumin.2015.03.011]
[PMID: 28536362]
[http://dx.doi.org/10.1002/1097-0142(197707)40:1+<519::AIDCNCR2820400718>3.0.CO;2-4] [PMID: 328135]