NorthWest Biotherapeutics Inc (NWBO)

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NWBIO Dec 21, 2023

DCVax-Direct involves essentially the same mechanism of action as DCVax-L, except that the tumor target proteins are taken up by the dendritic cells in situ in the tumor following intra-tumoral injection, rather than from tumor lysate from a surgically resected tumor tissue sample.

I wonder if they are getting similar numbers during DCVax-Direct proteomic analysis as they did below for L.

As the Company previously reported, proteomic studies have demonstrated that a single tumor lysate sample contained tens of thousands of different peptides and, out of this pool, the dendritic cells selected, processed and presented over 600 different peptides (tumor targets) to T cells. T cell studies (TCR sequencing and T cell clonal expansion assays) analyzing the breadth and strength of T cell response following DCVax-L treatment have found extensive responses, including clonal expansion of up to 800 T cell clones at month 4 and up to 1200 T cell clones at month 8 in the samples studied. Each T cell clone focuses on a particular and distinct target. In individuals not being treated with the vaccine, only 2 – 20 new T cells clones are seen between month 4 and month 8.