VYN201 demonstrated a positive effect on key biomarkers relevant to nonsegmental vitiligo, according to new data from a Phase 1b Trial.
VYNE Therapeutics Inc.’s VYN201 is a pan-bromodomain BET inhibitor designed to be locally administered to address diseases involving multiple, diverse inflammatory cell signaling pathways while providing low systemic exposure. BET inhibitors have the potential to treat a range of immuno-inflammatory and fibrotic diseases by blocking pro-inflammatory cytokine transcription with additional potential in myeloproliferative neoplastic disorders.
Positive clinical data from the Phase 1b trial were announced in October 2023. The trial was a 16-week open-label study assessing the safety, tolerability, pharmacokinetics, and exploratory efficacy of once-daily topical VYN201 in 29 patients with a clinical diagnosis of active nonsegmental vitiligo, in three dose cohorts (0.5%, 1.0% and 2.0% strengths). Enrolled subjects had two, non-facial active vitiligo lesions. One lesion, selected for treatment with VYN201, had skin tissue biopsies taken prior to first application of VYN201 and after 8 weeks of treatment. Biopsies were analyzed to quantify the effect of VYN201 on specific biomarkers related to inflammation associated with vitiligo, melanocyte proliferation, and melanogenesis. Exploratory data from the 1.0% and 2.0% cohorts showed that VYN201 treatment demonstrated biological activity and a positive effect on certain key biomarkers relevant to vitiligo disease severity and progression. The magnitude of biomarker modulation was more pronounced in the 2.0% dose cohort than in the 1.0% dose cohort, indicative of an emerging dose-response.
Results from the biomarker analyses include the following:
Downregulation of Matrix metalloproteinase-9 (MMP-9) levels: VYN201 induced the downregulation of MMP-9 in biopsied lesional skin after 8 weeks of treatment compared to baseline. At Week 8, there was a median reduction in MMP-9 of 40.8% in lesional skin compared to baseline for subjects in the 2.0% cohort, the study showed.
Upregulation of melanocyte-related transcription factors (MRTFs): VYN201 induced the upregulation of multiple MRTFs, including SRY-box transcription factor 10 (SOX10), Lymphoid-enhancing factor-1 (LEF1), β-Catenin and Microphthalmia associated transcription factor (MITF), after 8 weeks of treatment compared to baseline. Each of these markers are linked to the proliferation of melanocytes, recovery in melanogenesis, and subsequent re-pigmentation of skin. In the 2.0% cohort, SOX10, LEF1, β-Catenin and MITF transcription factors had median increases of 36.1%, 90.2%, 16.5% and 15.2% in their respective expression levels in lesional skin compared to baseline.
“VYN201’s potential to reduce melanocyte detachment by downregulating MMP-9 and by upregulating the expression of proteins relevant to melanocyte proliferation and melanogenesis is promising, and I look forward to the continued advancement of VYN201 as a potential differentiated therapy for vitiligo,” says Amit Pandya, MD, former President of the Global Vitiligo Foundation and Dermatologist, Department of Dermatology, Palo Alto Foundation Medical Group, in a news release.
“We are encouraged by these new biomarker data from the Phase 1b trial for VYN201, building on our recently announced positive clinical results,” adds David Domzalski, President and CEO of VYNE. “We’ve made considerable progress in advancing this program, and we look forward to initiating a Phase 2b trial evaluating VYN201 in patients with both active and stable nonsegmental vitiligo in the second quarter of this year.”
