Lenvatinib has just completed a Phase 2 trial in Gastrointestinal (GI) and Pancreatic Neuroendocrine Tumours. The trial was sponsored by Grupo Espanol de Tumores Neuroendocrinos (Spanish NET scientific organisation) and the manufacturers. A European venture with sites in Austria, Italy, Spain, UK. Headline: The responses are better than Everolimus (Afinitor) and Sunitinib (Sutent).
What is Lenvatinib?
It is a type of targeted therapy known as a multikinase inhibitor. The brand name is ‘LENVIMA‘. These work by inhibiting multiple intracellular and cell surface kinases, some of which are implicated in tumour growth and metastatic progression of cancer, thus decreasing tumour growth and replication. A range of receptor kinases are involved in these processes, including vascular endothelial growth factor receptor (VEGFR), platelet-derived growth factor receptor (PDGFR), stem cell factor (c-KIT), Flt3, fibroblast growth factor receptor (FGFR), which can be hyperactivated during tumour formation and progression. Tumour growth may be prevented by inhibiting the action of these hyperactivated receptor kinases, and as tumour progression usually involves the action of multiple kinases rather than just one, it is logical to target multiple kinases.
The Lenvantinib mechanism of action is similar to targeted therapy drugs already in use (or in trial) for Neuroendocrine Tumours:
- Sunitinib (Sutent) – a targeted therapy receptor protein-tyrosine kinase inhibitor. It inhibits the actions of vascular endothelial growth factor (VEGF) and is an angiogenesis inhibitor (i.e. the development of blood vessels to supply the tumour with nutrients, which they need to grow). It is a mutlikinase in inhibitor.
- Everolimus (Afinitor) – a targeted therapy kinase inhibitor that inhibits mammalian target of rapamycin (mTor) kinase, an enzyme required for cell growth and survival. By blocking this enzyme, the medication prevents cell division and, in turn, tumor growth. The medication can also interrupt angiogenesis.
- Cabozantinib, an oral potent inhibitor of vascular endothelial growth factor receptor 2, MET, and AXL, and currently on trial for Neuroendocrine Cancer. Click here.
Multikinase inhibitors such as Lenvatinib, may be used to treat advanced kidney cancer as well as other specific types of cancer (in my research I also noted that in addition to kidney cancer, the drug is already approved for liver and thyroid cancers). Worth also noting that the 3 examples of targeted therapy above are not just in use/in trial for Neuroendocrine Cancer, they are also in use/in trial for others including Renal (Kidney) Cancer, Breast Cancer. Often more than one single kinase inhibitor can be given as a combo treatment, perhaps in sequence, to tackle multi kinases.
Anything special about Lenvatinib for Neuroendocrine Cancer?
Recent reports from oncology conferences indicate that Lenvatinib showed significant antitumor activity and a favourable toxicity profile in progressive advanced NETs. This is the highest reported ORR with a targeted agent, confirmed by central radiology assessment in pancreatic NETs and Gastrointestinal (GI) NETs with promising progression free survival (PFS) in a pre-treated population; further evaluation is warranted.
Adverse events were mild to moderate in 90% of patients, the most frequent being fatigue, diarrhea and hypertension.
Lenvatinib showed the highest reported overall response rate (ORR) by central radiology assessment with a targeted agent in advanced NETs:
pNETs: 40.4% (95% CI 27.3-54.9),
GI NETs: 18.5% (95% CI 9.7-31.9.
Worth noting that Everolimus and Sunitinib were approved with ORRs much less than these figures.
Given the responses in comparison to other approved targeted agents, a phase 3 trial should be anticipated. Studies are “currently ongoing” and “further evaluation warranted”. I will keep this article live to provide updates.
Reference material used in the compilation of this article:
1. Annals of Oncology – Efficacy of Lenvatinib in patients with advanced pancreatic (panNETs) and gastrointestinal (giNETs) grade 1/2 (G1/G2) neuroendocrine tumors: Results of the international phase II TALENT trial (GETNE 1509) 23 Oct 2018 – click here.
2. ESMO Congress 2018 – Efficacy of Lenvatinib in patients with advanced pancreatic (panNETs) and gastrointestinal (giNETs) grade 1/2 (G1/G2) neuroendocrine tumors – click here
3. Prime Oncology Slide Show – click here (useful)
4. Clinical Trials Document NCT02678780 – click here
5. Manufactures website – click here.
Thanks for reading