Clinical Trials Summary

Human Clinical Trials Summary

Olvi-Vec has been studied in multiple early- and mid-phase clinical trials via regional and systemic deliveries, as a monotherapy and in combination with other therapies, in approximately 150 patients with a variety of cancer types.

 

There are several key documented takeaways from all our trials that apply, irrespective of the route of administration, dosing regimen or cancer type. Olvi-Vec was:

 

  • observed to be well tolerated, whether administered in a single dose or multiple doses per cycle, with no MTD reached in any of the trials and no significant issues with virus shedding into the environment;
  • demonstrated to infect and selectively kill tumor cells, initiate an antitumoral response, and modulate the tumor microenvironment, including re-sensitizing certain tumors to chemotherapy;
  • observed to have a benefit on disease control (including tumor growth reduction), progression-free survival (PFS), overall survival (OS) and other clinical benefits in a monotherapy setting; and
  • shown to enhance chemotherapeutic activities in a combination therapy setting.

 

There were also several key documented takeaways from our trials in which Olvi-Vec was systemically administered. Olvi-Vec demonstrated:

 

  • virus-dose dependent benefit on overall survival (OS), particularly in patients with lung disease;
  • potential to overcome pre-existing anti-vaccinia antibody levels by high and condensed dosing;
  • detectable live virus in blood circulation, even at two hours after infusion, allowing ample time for the virus to reach distal metastases; and
  • ability to infect tumor tissues and circulating tumor cells.

The following tables summarize the seven human clinical trials conducted with Olvi-Vec.

Protocol Number

GL- ONC1-002/MA (United Kingdom: Phase 1 – NCT00794131)

Indication

Advanced solid tumors

Modality & Route

Monotherapy as intravenous infusion

Results

Well-tolerated and maximum tolerated dose not reached.

 

Multiple high doses of virus delivered by i.v. route:

  • (A) demonstrated to be feasible:
    (i) extended PK (overcoming neutralizing antibodies), (ii) confirmed viral infection, replication at tumor sites distal to site of administration and in circulating tumor cells, (iii) induction of proinflammatory response and triggering activation of adaptive immunity
  • (B) demonstrated to generate anti-tumor activity and clinical benefits, including a virus-dose-dependent overall survival benefit, especially in patients with primary lung cancer or other tumor types with lung metastases

Protocol Number

GL-ONC1-003/MSK (United States: Phase 1 (Investigator Sponsored) – NCT01766739)

Indication

Malignant pleural effusion related either to malignant pleural mesothelioma or metastatic disease

Modality & Route

Monotherapy as intrapleural catheter delivery

Results

Well-tolerated, no dose-limiting toxicities, and maximum tolerated dose not reached

 

No virus shedding detected

 

Confirmed viral availability and PK in pleural fluid after multiple high doses of virus delivered by i.v. route:

 

  • Confirmed viral infection and replication in tumor tissues
  • Confirmed trend of survival advantage for patients with epithelioid subtype of mesothelioma when compared to well-documented historical data. The median overall survival (mOS) was 22.3 mos vs. historical 14 mos in all epithelioid subtype patients: for those who did not have subsequent surgery, the mOS was 23.4 mos vs. historical 10 mos; and for those who had subsequent surgery, the mOS was 22.3 mos vs. historical 19 mos.

Protocol Number

GL- ONC1-004/TUE (Germany: Phase 1 – NCT01443260)

Indication

Peritoneal carcinomatosis

Modality & Route

Monotherapy as intraperitoneal catheter delivery

Results

Well-tolerated, and no dose-limiting toxicities, and maximum tolerated dose not reached

 

Confirmed viral infection and replication in tumor tissues and oncolysis of tumor cells; and induction of proinflammatory response and anti-tumor immune response

 

Confirmed anti-tumor activity

Protocol Number

GL-ONC1-005/UCSD (United States: Phase 1 – NCT01584284)

Indication

Newly diagnosed head and neck cancer

Modality & Route

Combination therapy with intravenous or bolus injection with cisplatin and radiotherapy

Results

Well tolerate and no maximum tolerated dose reached.

 

No virus shedding detected

 

Confirmed (i) viral infection and replication of tumor tissues and (ii) induction of proinflammatory response and T-cell activation pathways

 

Confirmed 90% (17/19) ORR [77% (13/17) with CR], compared to historical of 64% ORR. Favorable PFS and OS as compared to well-documented historical data: The 1-year progression-free survival (PFS) rate was 66%, and 1-year overall survival (OS) rate was 86% in HPV-negative Stage IV patients, relative to historical data, including both Stage III & Stage IV patients, of 1-year PFS at 60%, and 1-year OS at 70%.

Protocol Number

GL- ONC1-011/UCSD (United States: Phase 1 (Investigator Sponsored) – NCT02714374)

Indication

Solid Organ Cancer

Modality & Route

Neoadjuvant monotherapy as intravenous bolus infusion followed by surgical resection of tumor

Results

Well tolerated and no dose-limiting toxicities and maximum tolerated dose not reached

 

Confirmed feasibility of systemic route of delivery: (i) live virus detected in blood circulation hours after completion of virus infusion; (ii) viral infection and replication in tumor tissues and (iii) induction of increased tumor-infiltrating lymphocytes into virus-infected tumor tissues

Protocol Number

GL- ONC1-021/AHCI (United States: EAP – NCT03420430)

Indication

Advanced cancers (solid tumors & blood cancer)

Modality & Route

Monotherapy as intravenous bolus infusion

Results

Well tolerated and no dose-limiting toxicities and maximum tolerated dose not reached

 

Confirmed objective response and clinical benefit of monotherapy and immunochemotherapy

Protocol Number

GL–ONC1-015/AHCI (United States: Phase 1b/2 – NCT02759588)

Indication

Platinum resistant/ refractory ovarian cancer, fallopian cancer or primary peritoneal carcinomatosis

Modality & Route

IP Infusion as Monotherapy or as combination therapy with carboplatin doublet chemotherapy + bevacizumab

Results

Primary endpoints met

 

Well tolerated and no dose-limiting toxicities and maximum tolerated dose not reached

 

Confirmed trend of favorable PFS, ORR and OS. The mPFS was 11.0 mos, ORR was 54%, and OS was 15.7 mos as compared to well-documented historical data <4 mos, <20%, < 12 mos, respectively; and as compared to a mPFS of 4.5 mos on the patients’ immediate prior line of therapy (historically, mPFS generally decreases with each subsequent line of therapy.

 

Exploratory Objectives:

  • Demonstrated viral infection and replication in tumor tissues, and oncolysis of tumor cells
  • Demonstrated virus-mediated modulation of tumor immune microenvironment; induction of anti-tumor immune response

The diverse Olvi-Vec clinical program has yielded data that informs our clinical development strategy and future trial design in multiple indications. For more information see our Corporate Presentation.