After extensive – and at times, intensive – preclinical and clinical research on the adaptive immune system and how best to activate the cytolytic T cells in both hematological malignancies and solid tumours, attention is beginning to increase on the innate immune system. In particular, researchers are investigating how approaches in this realm can be incorporated into rational combinations with adaptive therapies, such that outcomes might be improved more than with either alone.

Human NK Cell  Source: NIH

There are a number of ways to activate the innate immune system and direct dendritic or NK cells, for example. Some therapeutics seek to boost the responses via different innate sensing pathways such as cGAS/STING or CD47/SIRPα, for example, while others involve targeting stimulatory cytokines, chemokines, toll-like receptors (TLRs), etc through various agonist molecules.

There are also a myriad of vaccination strategies to consider involving neoantigens or neoepitopes, not to forget NK cell infusions, various NK CARs, bi/trispecifics and even checkpoint blockade of NK related targets.

These development have typically not received the same amount of attention as their T cell cousins, but it’s certainly an active and fertile area of research and one that we are likely to hear more about going forward as new developments start to make their mark.

In a world of ‘T cell chauvinists’ – to quote Dr Adi Diab (MD Anderson) – let’s not forget or ignore the humble NK cells, which also have cancer killing abilities.

Over the next three weeks, we have an extended mini-series focusing on NK cells rolling out with interviews and commentary from academia and biotechs alike across both sides of the pond. It promises to be an interesting and provocative ride with plenty of critical questions to pose and resolve along the journey.

So, hang onto your hats for the first part of the journey…

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