RE: DTH1 Mar 2023 17:30
One interesting approach is
under development by the Oxford
based start-up Scancell. The fi rm’s
Moditope platform aims to enlist
CD4+ T cells, rather than CD8+ T
cells. The former are sometimes
called “helper” cells that coordinate
activity by cytotoxic CD8+ T cells,
which are those that directly
challenge pathogens in the body.
Lindy Durrant, chief executive of
Scancell, explains that the idea is to
prime the CD4+ T cells in such a way
that, when they enter tumours, they
provoke infl ammation in the cells,
which would otherwise be absent.
This should allow the CD4+ T cells to
become cytotoxic themselves, detect
the target peptides on the tumour
cells, and then destroy them—rather
like ripping the invisibility cloak off
an intruder.
“If you can really get good
infl ammation and good, targeted
T cells in these tumours, you can just
make [the tumours] disappear,” says
Durrant. Referring to unpublished
data from an ongoing trial, she
mentions that one patient has
demonstrated a 36% reduction
in tumour size after just two
immunisations (of a total of fi ve).
Biopsies from this patient are
due to be analysed to confi rm the
presence and activity of immune
cells. Durrant says, “I can’t really
believe that result yet; we need to get
more.” Around 140 patients will take
part in the phase 1/2 trial, due to
complete in 2026.
https://www.bmj.com/bmj/section-pdf/1079078?path=/bmj/380/8370/This_Week.full.pdf
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