Kazia CEO, Dr James Garner, commented, “We are delighted to add this tremendously exciting new compound to the Kazia pipeline. Evotec have done first-class work in the early development of EVT801, and the preclinical data package is exceptionally strong. We intend to fast track a phase I clinical trial of the drug, which we expect to commence in CY2021.”
He added, “As we have built Kazia over the past five years, our strategy has been to assemble a portfolio of world-class development candidates through in-licensing. The EVT801 transaction is wholly consistent with that strategy. We have demonstrated, through the paxalisib program, our ability to add value to a development candidate, and we intend to similarly accelerate EVT801 via a rich and innovative development program.”
Evotec CEO, Dr Werner Lanthaler, commented, “we are very pleased to partner with Kazia for this promising asset, for which we have high hopes. Our corporate strategy does not provide for Evotec to take EVT801 through clinical trials itself, so we have sought to identify a partner who can do justice to the drug’s potential. We recognise Kazia’s track record and look forward to working together to make EVT801 available to patients and clinicians.”
EVT801
EVT801 is a small molecule inhibitor of vascular endothelial growth factor receptor 3 (VEGFR3). It is orally available, and so can be administered to patients by mouth.
For more than two decades, one of the most successful approaches in the treatment of cancer has been to target angiogenesis, the formation of new blood vessels. Drugs which inhibit angiogenesis, such as Avastin® (bevacizumab), starve the growing tumour of nutrients. However, inhibiting angiogenesis also results in hypoxia (low levels of oxygen) around the tumour, and this is thought to generate resistance to treatment. Almost all cancers treated with current anti-angiogenic drugs will eventually develop resistance.
An alternative approach, which may avoid this problem, is to target lymphangiogenesis, which is the formation of new lymphatic vessels. Doing so achieves many of the same objectives as targeting angiogenesis but may avoid the problem of resistance induced by hypoxia. Moreover, the lymphatic system is a common route by which tumours spread (metastasise) throughout the body, and so inhibiting lymphangiogenesis may help to limit the ability of the tumour to spread.
In recent years, several new drug candidates have attempted to inhibit lymphangiogenesis. For example, Nexavar® (sorafenib) inhibits several forms of VEGFR, as well as other targets, and is approved for the treatment of renal cell carcinoma and hepatocellular carcinoma. Several drugs described as angiokinase inhibitors are in development, and some of these inhibit VEGFR3. However, each of these drugs has multiple targets, leading in many cases to significant side effects. The distinguishing feature of EVT801 is a high degree of specificity for VEGFR3, which should allow it to minimise toxicity.
In addition, EVT801 has shown powerful evidence in the laboratory of an ability to change the balance of immune cells within the tumour. Many tumours are resistant to the newest generation of immuno-oncology therapies because they do not contain the right immune cells for the drugs to act upon. It is hoped that administration of EVT801 may help to sensitise these tumours to immuno-oncology therapies such as Keytruda® (pembrolizumab) and Opdivo® (nivolumab) and thereby extend their use.