McKenzie Molly, Lian Guang-Yu, Pennel Kathryn A F, Quinn Jean A, Jamieson Nigel B, Edwards Joanne
School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1BD, UK.
Heliyon. 2024 Jun 12;10(12):e32904. doi: 10.1016/j.heliyon.2024.e32904. eCollection 2024 Jun 30.
The NFκB pathway, known as the central regulator of inflammation, has a well-established role in colorectal cancer (CRC) initiation, progression, and therapy resistance. Due to the pathway's overarching roles in CRC, there have been efforts to characterise NFκB family members and target the pathway for therapeutic intervention. Initial research illustrated that the canonical NFκB pathway, driven by central kinase IKKβ, was a promising target for drug intervention. However, dose limiting toxicities and specificity concerns have resulted in failure of IKKβ inhibitors in clinical trials. The field has turned to look at targeting the less dominant kinase, IKKα, which along with NFκB inducing kinase (NIK), drives the lesser researched non-canonical NFκB pathway. However prognostic studies of the non-canonical pathway have produced conflicting results. There is emerging evidence that IKKα is involved in other signalling pathways, which lie outside of canonical and non-canonical NFκB signalling. Evidence suggests that some of these alternative pathways involve a truncated form of IKKα, and this may drive poor cancer-specific survival in CRC. This review aims to explore the multiple components of NFκB signalling, highlighting that NIK may be the central kinase for non-canonical NFκB signalling, and that IKKα is involved in novel pathways which promote CRC.
核因子κB(NFκB)信号通路是炎症的核心调节因子,在结直肠癌(CRC)的起始、进展和治疗耐药中发挥着既定作用。由于该信号通路在CRC中具有重要作用,人们一直在努力对NFκB家族成员进行表征,并针对该信号通路进行治疗干预。最初的研究表明,由中心激酶IKKβ驱动的经典NFκB信号通路是药物干预的一个有前景的靶点。然而,剂量限制毒性和特异性问题导致IKKβ抑制剂在临床试验中失败。该领域已转向研究靶向作用较弱的激酶IKKα,IKKα与NFκB诱导激酶(NIK)一起驱动研究较少的非经典NFκB信号通路。然而,对非经典信号通路的预后研究结果相互矛盾。越来越多的证据表明,IKKα参与了经典和非经典NFκB信号通路之外的其他信号通路。有证据表明,其中一些替代信号通路涉及一种截短形式的IKKα,这可能导致CRC患者的癌症特异性生存率较低。本综述旨在探讨NFκB信号传导的多个组成部分,强调NIK可能是非经典NFκB信号传导的中心激酶,并且IKKα参与促进CRC的新信号通路。