No. This is actually the study I was referring to in the OP which confirms that Twist1 is dispensible in human DPCs. Twist1 is a Wnt target gene, but its effects differ depending on context, whether it forms heterodimers with Tcf12, or homodimers, or interacts with HDAC9 or b-catenin. When it forms more heterodimers it promotes EMT, which is negative for hair growth. (See OP)
Differential Expression between Human Dermal Papilla Cells from Balding and Non-Balding Scalps Reveals New Candidate Genes for Androgenetic Alopecia -
Twist1 is upregulated in Androgenetic Alopecia in this study, and BMP4 is downregulated. BMP4 upregulates Id proteins, which are required for hair growth, and which regulate Twist1 dimer composition.
Selective ablation of BMP signaling in stem and progenitor cells within the hair follicle combined with in-depth genomic profiling reveals cell type-specific roles in the regulation of proliferation and lineage specification.
www.cell.com
Ids prevent the emigration of DPCs seen in Androgenetic Alopecia. Their loss results in a progressively shorter hair cycle. In the absence of Id proteins, Twist1 balance shifts to heterodimers and EMT over hair growth promotion.
Saethre-Chotzen syndrome is associated with haploinsufficiency of the basic-helix-loop-helix (bHLH) transcription factor TWIST1 and is characterized by premature closure of the cranial sutures, termed craniosynostosis; however, the mechanisms underlying this defect are unclear. Twist1 has been...
pubmed.ncbi.nlm.nih.gov
View attachment 182567
BMP4 was only expressed in non-balding DPCs.
The study you posted shows that Twist1 binds with Tcf4 and activates downstream Tcf4 target genes promoting the release of growth factors, but that Twist1 is not necessary for the promotion of growth factors. B-catenin also binds with Tcf4 and promotes the release of growth factors, but without the activation of negative hair growth regulators.
In other words, Twist1 activates some genes that are positive regulators of hair growth, but it is not necessary for the activation of those genes. What this study didn't explore was the Twist1 gene regulation that negatively regulates hair growth, which is shown in other studies. Since Twist1 is shown here to be dispensible for growth factor secretion, and the deletion of Twist1 keeps hair in anagen indefinitely, the best thing to do is eliminate Twist1 altogether. ADQ comes close to doing that.
Harmine inhibits Wnt signaling through a mechanism unrelated to Twist1, DYRK1A. Also, Twist1 contributes to embryogenesis, creation of new hair follicles in the womb. We already have hair follicles but they are stuck in Anagen II. Twist1 is not helpful in our case.