In addition, under a three-party agreement among Endocyte, the University of Sydney and ANZUP, a cooperative cancer trials group operating in Australia and New Zealand pursuing research in genito-urinary malignancies, ANZUP will sponsor and undertake jointly with the University a randomized phase 2 multi-center TheraP trial of ¹⁷⁷Lu-PSMA-617 versus cabazitaxel in 200 mCRPC patients. Under the three-party agreement, Endocyte will provide the PSMA-617 precursor molecule and modest financial support for the trial.  Endocyte will have access to data generated from the trial, which is a potentially important supportive trial for future regulatory submissions. The primary financial obligations of the trial, along with labeling PSMA-617 with Lutetium-177, will be the responsibility of the University and ANZUP.   

At the 2017 ESMO conference in September, Dr. Michael Hofman of the Peter MacCallum Cancer Center in Melbourne, Australia presented the results of an open-label, single-arm, non-randomized trial of ¹⁷⁷Lu-PSMA-617. Thirty mCRPC patients were treated with up to four cycles and doses of 4-8 GBq. Primary endpoints included safety and efficacy as defined by prostate specific antigen (PSA) response, quality of life, and imaging response. As previously announced, the results showed a 57% PSA response rate (>50% reduction) and 71% interim response rate in soft tissue lesions (as measured by RECIST criteria) in patients who had previously failed conventional therapies such as docetaxel, cabazitaxel, enzalutamide and abiraterone. Median overall survival was 12.7 months. The drug was well-tolerated, with a low rate of adverse effects and no renal toxicity. Significantly improved quality of life scores and reduction in pain scores were recorded in 37% and 43% of patients, respectively. This trial has subsequently been expanded to 50 subjects from the original 30, with updated results expected to be presented in 2018.

In September 2017, Endocyte presented data on its adaptor controlled CAR T-cell platform at the 2017 CAR-TCR Summit, further demonstrating how its novel CAR-T therapy controls T-cell activity to enhance both safety and efficacy.   Dr. Michael Jensen of Seattle Children's Research Institute will lead the clinical evaluation of Endocyte's first adaptor controlled CAR T-cell therapy in patients with folate-receptor positive osteosarcoma, with pre-clinical evaluations expected to be completed before the end of this year, in anticipation of a potential IND filing in 2018. Multiple additional adaptor molecules designed to be directed to distinct tumor targets including, potentially, cholecystokinin-2 receptor (CCK2R), neurokinin-1 receptor (NK1R) and others, are in development through the company's collaboration with Purdue University.

• Australian TheraP trial first patient visit (Dec 2017)
• Expected initiation of US registration trial of ¹⁷⁷Lu-PSMA-617 in mCRPC first patient visit (1H 2018)
• Mature full 50-patient data readout, including overall survival, of investigator initiated trial at Peter MacCallum Cancer Centre in Melbourne, Australia (2H 2018)
• Publications on other ongoing investigator initiated clinical trials of ¹⁷⁷Lu-PSMA-617 in prostate cancer patients (2018)
• CAR-T phase 1 first patient visit in osteosarcoma and potential proof of concept (2H 2018)

In September 2017, the Company entered into a development and license agreement with ABX GmbH (the "License Agreement") that grants the Company exclusive worldwide rights to develop and commercialize PSMA-617, including the product candidate known as ¹⁷⁷Lu-PSMA-617, an RLT that targets prostate-specific membrane antigen (PSMA). The Company recorded $16.5 million of acquired in-process research and development ("IPR&D") expenses related to the License Agreement for the three months ended September 30, 2017 consisting of the following:

Research and development expenses were $4.1 million for the third quarter of 2017, compared to $6.0 million for the same period in 2016. The decrease was primarily attributable to: a decrease of $1.1 million in compensation expense as a result of employee terminations since September 30, 2016, including those resulting from the company's restructuring in June 2017; a decrease in expenses related to trial and manufacturing costs for EC1456; decreases in expenses related to pre-clinical work and general research, including the development of EC2629; and a decrease in manufacturing expense for EC1169. These decreases were partially offset by an increase in expenses related to the EC1169 phase 1b trial.

Endocyte routinely posts important information for investors on its website, www.endocyte.com, in the "Investors & News" section. Endocyte uses this website as a means of disclosing material information in compliance with its disclosure obligations under Regulation FD. Accordingly, investors should monitor the "Investors & News" section of Endocyte's website, in addition to following its press releases, SEC filings, public conference calls, presentations and webcasts. The information contained on, or that may be accessed through, Endocyte's website is not incorporated by reference into, and is not a part of, this document.

Endocyte is a biopharmaceutical company and leader in developing targeted therapies for the treatment of cancer. Endocyte uses drug conjugation technology to create novel therapeutics and companion imaging agents for personalized targeted therapies. The company's agents actively target receptors that are over-expressed on diseased cells relative to healthy cells, such as prostate-specific membrane antigen (PSMA) in prostate cancer. This targeted approach is designed to safely enable the delivery of highly potent drug payloads. The companion imaging agents are designed to identify patients whose disease over-expresses the target of the therapy and who are therefore more likely to benefit from treatment. For additional information, please visit Endocyte's website at www.endocyte.com. 

Certain of the statements made in this press release are forward looking, such as those, among others, relating to future spending, future cash balances, future use of capital, the timing of initiation and completion of clinical trials, the enrollment period for, and availability and reporting of data from, ongoing and future clinical trials, the occurrence and timing of actions by regulatory agencies, estimates of the potential market opportunity for the company's product candidates, and the company's future development plans including those relating to the completion of pre-clinical development in preparation for possible future clinical trials. Actual results or developments may differ materially from those projected or implied in these forward-looking statements. Factors that may cause such a difference include risks that the company or independent investigators may experience delays in the initiation or completion of clinical trials (whether caused by competition, adverse events, patient enrollment rates, shortage of clinical trial materials, regulatory issues or other factors); risks that data from prior clinical trials may not be indicative of subsequent clinical trial results; risks related to the safety and efficacy of the company's product candidates; risks that early stage pre-clinical data may not be indicative of subsequent data when expanded to additional pre-clinical models or to subsequent clinical data; risks that evolving competitive activity and intellectual property landscape may impair the company's ability to capture value for the technology; risks that expectations and estimates turn out to be incorrect, including estimates of the potential markets for the company's product candidates, estimates of the capacity of manufacturing and other facilities required to support its product candidates, projected cash needs, and expected future revenues, operations, expenditures and cash position. More information about the risks and uncertainties faced by Endocyte, Inc. is contained in the company's periodic reports filed with the Securities and Exchange Commission. Endocyte, Inc. disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.