Volume 19 Issue 5, May 2022

Patients with pancreatic ductal adenocarcinoma (PDAC) usually have a dismal prognosis, and even after curative resection most patients will have disease relapse and ultimately die. Nonetheless, adjuvant chemotherapy has considerably improved the outcomes of patients who are able to undergo surgery. The PREOPANC trial provides some evidence supporting the use of neoadjuvant therapy for patients with borderline resectable PDACs but not, as claimed, for those with resectable tumours.

Antibodies targeting PD-1 or its ligand PD-L1 have revolutionized cancer therapy. Increased understanding of the mechanisms regulating PD-L1 has revealed links with several important oncogenic signalling pathways. Herein, the authors review the transcriptional, post-transcriptional and translational regulation of PD-L1 expression in cancers as well as the diverse post-translational modifications, including phosphorylation, palmitoylation, glycosylation, acetylation and ubiquitination, that affect PD-L1 stability and activity. They also discuss the possibility to simultaneously target key oncogenic pathways and modulate PD-L1 expression using small-molecule agents, which have potential advantages over or might synergize with anti-PD-1/PD-L1 antibodies.

The incidence of human papillomavirus (HPV)-positive oropharyngeal squamous cell carcinoma (OPSCC) is increasing rapidly in most developed countries. In this Review, the authors provide an overview of the epidemiology, molecular biology and treatment of HPV-positive OPSCC, including discussions of the role of treatment de-escalation and emerging novel therapies.

Gastrointestinal stromal tumour (GIST) is the most common form of sarcoma and has become a paradigm of precision medicine owing to the fact that almost all patients harbour one of several known molecule drivers, most of which can be targeted therapeutically. Nevertheless, novel therapeutic strategies are required to overcome the intrinsic resistance of certain subtypes of GIST to existing treatments as well as the acquired resistance that eventually arises in initially sensitive subtypes. This Review describes the biology of GIST, the evolution of the current treatments for this cancer, and the emerging therapeutic agents and approaches that might overcome the remaining clinical challenges.

Chimeric antigen receptor T cells have revolutionized the treatment of patients with certain haematological malignancies. Nonetheless, an optimal approach to lymphodepleting chemotherapy and/or bridging therapies has yet to be defined in patients receiving these agents. In this Review, the authors describe the various lymphodepletion and/or bridging therapy strategies used, and highlight the need for prospective comparisons in order to determine the safest and most effective approach.