Abstract
Background: Breast cancer is the most leading cause of death, with 49.9% of crude incidence rate and 12.9% of crude mortality rate. Natural resources have been extensively used throughout history for better and safer treatment against various diseases.
Objectives: The present study was aimed to investigate the antioxidant and anticancer potential of a tropical lichen Dirinaria consimilis (DCME) and its phytochemical analysis.
Methods: The DCME was preliminarily evaluated for ROS, and RNS scavenging potential. Furthermore, DCME was evaluated for in vitro anticancer activity through cell proliferation assay, cell cycle analysis, annexin V/PI staining, morphological analysis, and western blotting study. Finally, the HPLC and LC-MS analyses were done to identify probable bioactive compounds.
Results: The in vitro antioxidant studies showed promising ROS, and RNS scavenging potential of DCME. Moreover, the in vitro antiproliferative study bared the cytotoxic nature of DCME towards MCF-7 (IC50 - 98.58 ± 6.82μg/mL) and non-toxic towards WI-38 (IC50 - 685.85 ± 19.51μg/mL). Furthermore, the flow-cytometric analysis revealed the increase in sub G1 population as well as early apoptotic populations dose-dependently. The results from confocal microscopy showed the DNA fragmentation in MCF-7 upon DCME treatment. Finally, the western blotting study revealed the induction of tumor suppressor protein, p53, which results in increasing the Bax/Bcl-2 ratio and activation of caspase-cascade pathways.
Conclusion: The activation of caspase-3, -8, -9 and PARP degradation led us to conclude that DCME induces apoptosis in MCF-7 through both intrinsic and extrinsic mechanisms. The LC-MS analysis showed the presence of various bioactive compounds.
Keywords: Lichen, Dirinaria consimilis, antioxidant, anticancer, p53, caspase-cascade.
Graphical Abstract
[http://dx.doi.org/10.1007/s11095-008-9661-9] [PMID: 18626751]
[http://dx.doi.org/10.1089/ars.2007.9.49] [PMID: 17115887]
[http://dx.doi.org/10.4103/0973-7847.70902] [PMID: 22228951]
[http://dx.doi.org/10.3390/metabo9110258] [PMID: 31683833]
[http://dx.doi.org/10.3390/molecules22010058] [PMID: 28042865]
[http://dx.doi.org/10.1016/j.bbagen.2013.02.008] [PMID: 23428572]
[http://dx.doi.org/10.1371/journal.pone.0082293] [PMID: 24358166]
[http://dx.doi.org/10.3109/13880209.2011.633089] [PMID: 22471936]
[http://dx.doi.org/10.3109/13880209.2014.1003354] [PMID: 25885942]
[http://dx.doi.org/10.1055/s-2004-832657] [PMID: 15549672]
[http://dx.doi.org/10.7324/JAPS.2017.70113]
[http://dx.doi.org/10.3126/jbs.v4i1.20572]
[http://dx.doi.org/10.1186/1472-6882-8-63] [PMID: 19068130]
[http://dx.doi.org/10.4103/pm.pm_395_16] [PMID: 28808404]
[http://dx.doi.org/10.1002/chem.201704368] [PMID: 28961334]
[http://dx.doi.org/10.1016/S0944-7113(98)80032-9] [PMID: 23195845]
[http://dx.doi.org/10.1186/s12885-018-4959-4] [PMID: 30367624]
[http://dx.doi.org/10.1007/s11011-018-0207-5] [PMID: 29542038]
[PMID: 26080509]
[http://dx.doi.org/10.1016/j.bmc.2014.04.053] [PMID: 24853321]
[http://dx.doi.org/10.1080/14786419.2013.811410] [PMID: 23822758]
[http://dx.doi.org/10.1080/14786419.2010.529546] [PMID: 22136374]
[http://dx.doi.org/10.2174/1389201017666160401144825] [PMID: 27033512]
[http://dx.doi.org/10.1002/ptr.5551] [PMID: 26744260]
[http://dx.doi.org/10.1155/2012/452431] [PMID: 21915186]
[http://dx.doi.org/10.1016/j.phymed.2012.07.012] [PMID: 22921748]
[http://dx.doi.org/10.1016/j.cbi.2016.03.012] [PMID: 26969521]
[http://dx.doi.org/10.1016/j.tiv.2017.01.008] [PMID: 28095330]
[http://dx.doi.org/10.1007/s13105-018-0608-2] [PMID: 29435821]
[http://dx.doi.org/10.1007/s00011-017-1039-1] [PMID: 28409189]
[http://dx.doi.org/10.1007/s10753-015-0125-1] [PMID: 25655391]
[http://dx.doi.org/10.1016/j.pharep.2018.07.004] [PMID: 30340097]
[http://dx.doi.org/10.1021/jf302583r] [PMID: 22920220]
[http://dx.doi.org/10.1007/BF02980104] [PMID: 15022720]
[http://dx.doi.org/10.15430/JCP.2016.21.4.257] [PMID: 28053960]
[http://dx.doi.org/10.1007/s12272-012-0819-y] [PMID: 22941492]
[http://dx.doi.org/10.1016/j.jep.2018.08.006] [PMID: 30107246]
[http://dx.doi.org/10.1007/BF01289410] [PMID: 11732335]
[http://dx.doi.org/10.1111/j.1471-4159.1992.tb10990.x] [PMID: 1402908]
[http://dx.doi.org/10.1016/0003-2697(87)90222-3] [PMID: 3120621]
[http://dx.doi.org/10.3168/jds.S0022-0302(78)83613-3]
[http://dx.doi.org/10.1016/S0076-6879(00)19004-4] [PMID: 10907495]
[http://dx.doi.org/10.1001/archsurg.1997.01430350027005] [PMID: 9366709]
[PMID: 7544536]
[http://dx.doi.org/10.1038/sj.neo.7900101] [PMID: 11005563]
[http://dx.doi.org/10.1002/0471142735.im0507s60] [PMID: 18432930]
[http://dx.doi.org/10.1016/0022-1759(95)00072-I] [PMID: 7622868]
[http://dx.doi.org/10.1038/35042675] [PMID: 11099028]
[http://dx.doi.org/10.1093/emboj/17.14.3878] [PMID: 9670005]
[http://dx.doi.org/10.1074/jbc.M412819200] [PMID: 15637055]
[PMID: 11711427]
[http://dx.doi.org/10.1093/carcin/23.1.143] [PMID: 11756235]
[http://dx.doi.org/10.3109/10715769509145649] [PMID: 7633567]
[http://dx.doi.org/10.1080/14786419.2011.625502] [PMID: 22273392]
[http://dx.doi.org/10.1002/tox.22549] [PMID: 29446234]