According to
this study and
this, oxymatrine promotes apoptosis through caspase-3 and caspase-9 pathways.
Could it be that the studies you read which show oxymatrine inhibits apoptosis might relate to virally-infected tissue? If so, you have to be careful about interpreting results, because it may be that by its antiviral effects, oxymatrine inhibits the infection, and this in turn would automatically reduce apoptosis.
Apoptosis arises from the immune response to infection, so if the infection is reduced by an antiviral, then the apoptosis is going to be reduced also. In fact sometimes studies gauge the efficacy of an antiviral via its ability to reduce cell death in an infected cell line.
We are talking about trying to incude apoptosis of virally infected tissue
@Hip. What I am seeing in the research is that multiple studies show in non-cancerous tissue caspase-3 is inhibited.
Liu's study was
retracted and Zhang found the opposite effect (caspase-3 inhibition by oxymatrine) in 2017. [Zhang X, Jiang W, Zhou AL, Zhao M, Jiang DR.
Inhibitory effect of oxymatrine on hepatocyte apoptosis via TLR4/PI3K/Akt/GSK-3β signaling pathway. World J Gastroenterol. 2017;23(21):3839-3849. doi:10.3748/wjg.v23.i21.3839]
So multiple studies show that OMT inhibits caspase-3 in non-cancerous tissue and thus blocks apoptosis. There is also evidence of a neuroprotective effect by increasing Nitric Oxide which is an anti-oxidant that works against apoptosis.
“OMT preconditioning down-regulated apoptosis of hepatocytes and ameliorated pathological changes in liver tissue. The levels of AST, ALT, TNF-α and IL-1β in the model group increased significantly, and were significantly reduced by OMT pretreatment.
OMT pretreatment down-regulated expression of TLR4 and active caspase-3 and the Bax/Bcl-2 ratio, and up-regulated expression of P-AktSer473 (Akt phosphorylated at serine 473) and P-GSK3βSer9 (glycogen synthase kinase 3β phosphorylated at serine 9) induced by LPS/D-GalN.”" [Zhang X, Jiang W, Zhou AL, Zhao M, Jiang DR.
Inhibitory effect of oxymatrine on hepatocyte apoptosis via TLR4/PI3K/Akt/GSK-3β signaling pathway. World J Gastroenterol. 2017;23(21):3839-3849. doi:10.3748/wjg.v23.i21.3839]
“OMT upregulated the ratio of Bcl-2/Bax and
downregulated the level of caspase-3.”" [Dong P, Ji X, Han W, Han H.
Oxymatrine attenuates amyloid beta 42 (Aβ1-42)-induced neurotoxicity in primary neuronal cells and memory impairment in rats. Can J Physiol Pharmacol. 2019;97(2):99-106. doi:10.1139/cjpp-2018-0299.]
Another thing that prevents apoptosis increased anti-oxidant production in non-cancerous cells.
[Zhao P, Zhou R, Li HN, et al.
Oxymatrine attenuated hypoxic-ischemic brain damage in neonatal rats via improving antioxidant enzyme activities and inhibiting cell death. Neurochem Int. 2015;89:17-27. doi:10.1016/j.neuint.2015.06.008].
[Wu B, Yue H, Zhou GH, et al.
Protective effects of oxymatrine on homocysteine-induced endothelial injury: Involvement of mitochondria-dependent apoptosis and Akt-eNOS-NO signaling pathways. Eur J Pharmacol. 2019;864:172717. doi:10.1016/j.ejphar.2019.172717]
“Autophagy has been better studied in ischemia/reperfusion (I/R) injuries, and previous work showed that Oxymatrine (OMT), a quinolizidine alkaloid, protects cells against myocardial I/R injury by inhibiting autophagy.”
[ Zhang Y, Zhang Y, Tang J, et al.
Oxymatrine Inhibits Homocysteine-Mediated Autophagy via MIF/mTOR Signaling in Human Umbilical Vein Endothelial Cells. Cell Physiol Biochem. 2018;45(5):1893-1903. doi:10.1159/000487912]
In cancerous cells it causes apoptosis through oxidative shock. We have a dual effect-protects against apoptosis in injuries (NO) while inducing it in cancerous tissue which makes sense because it causes cell cycle arrest.
[Zhang. 2010.
https://pubmed.ncbi.nlm.nih.gov/20124987/ ]
So my assertion that it shouldn't be used to treat ME viruses because it reduces caspase-3 and NO thus preventing apoptosis stands.