In summary, endosomal TLRa VLPs all have the ability to activate pDCs, however, combined TLR7/8 activation using TLR7/8a VLPs was significantly more effective than the other VLPs at activating T cells and was dependent on direct contact with pDCs. Therefore, TLR7/8a VLPs may potentially induce a robust anti-tumor immune response and warrant further investigation for cancer therapy.
Vidutolimod PS20-A alone or in combination with pembrolizumab had an acceptable safety profile and promising clinical activity in patients with PD-1 blockade-resistant melanoma.
ELISA revealed significantly elevated levels of IFN-γ, IL-12, and TNF-α in the sera of mice after 24 h of one treatment with vidutolimod + ICB as well as increased levels of proliferating T cells and pDCs in draining lymph nodes 72 h after the third and final treatment, thus indicating the immune-boosting effect of this therapy. Vidutolimod + ICB caused a significant decrease in Ki-67 expression by epithelial cells in the lesion area compared to untreated mice, implicating that this treatment regime may prevent lesion progression.
P2, N=60, Active, not recruiting, National Cancer Institute (NCI) | Trial completion date: Jun 2025 --> Jun 2026 | Trial primary completion date: Jun 2025 --> Jun 2026
8 months ago
Trial completion date • Trial primary completion date
P2, N=60, Suspended, National Cancer Institute (NCI) | Trial completion date: Dec 2024 --> Jun 2025 | Trial primary completion date: Dec 2024 --> Jun 2025
1 year ago
Trial completion date • Trial primary completion date • Combination therapy