Hi @AnhedonicApe
It’s very interesting you’re going to trial this, but I must point out this is not to be taken lightly. To be even potentially effective, which we certainly cannot say it will be, you would likely need to be using this drug for a considerable time.
To provide context as I am not sure how familiar you are with epigenetics, methylation modifies chromatin and thus alters the access of proteins that bind to DNA. Methylation is a repressive modification that can be practically permanent as it is “copied” upon cell division by methyltransferase enzyme DNMT1, while the enzymed DMT3a and 3b establish new methylation. The base 5-methylcytosine is formed through the attachment of a methyl group to the 5th position of the cytosine ring in a CpG dinucleotide. More methylation in a CpG island means a more repressed gene - a “dimmer switch” if you like. Methylation is by its very nature a question of degrees, and provides compelling explanation for the vast difference in affected sites and severities between patients (e.g. why some have a functional impairment like anesthesia while others will experience severe atrophy), and why additional persistent symptoms develop in PFS/PSSD patients following further endocrine disruption.
Proven significant epigenetic differences in pfs patients with genital pain and atrophy (Di Loreto 2014) were averagely 5 years after cessation, and this would rule out transient modifications in severe cases. Traish’s 2018 paper, The Post-finasteride Syndrome: Clinical Manifestation of Drug-Induced Epigenetics Due to Endocrine Disruption, discusses this finding.
During cell division and replication, DNMT1 maintains existing methylation, and is thus the target of Decitabine. Decitabine’s relevant action is the inhibition of DMNT1, and the result is a reduced maintenance of existing methylation. To be clear, methylation is crucially important in like…not being a pile of soup…and 80% of mammalian CpG islands are methylated. This is very important to cell differentiation. The effects of inhibition are more significant in the frequent application of cancer, as cancer cells divide much faster than other somatic cells, so are vulnerable to the interruption of DNMT1. To use such a thing to address deleteriously methylated loci in somatic cells, it remains to be seen whether something this nonspecific could be taken for a long enough duration without adverse effects in the rest of the organism. It is also important to consider that adult neurons do not divide. Although DNMT enzymes are expressed in postmiotic neurons, it is not yet clear exactly how they mechanistically regulate neuronal transcription.
I hope that helps you make your decision, and I wish you luck if you go ahead with it. Please keep us informed if so.