Vaccine Info

TG4001 HPV Cancer Vaccine

TG4001 HPV Cancer Vaccine Description

TG4001 is a therapeutic cancer vaccine candidate using an attenuated and modified poxvirus (MVA) as a vector expressing the HPV16 E6 and E7 proteins (rendered non-oncogenic) and interleukin-2. 

TG4001 is developed in Human Papillomavirus (HPV)-16 positive cancers, such as cervical, vaginal, and oropharyngeal squamous cell carcinoma of the head and neck.

On September 16, 2020, Transgene, previously known as Tipapkinogen Sovacivec, announced the analysis of the efficacy data from the Phase 1b/2 trial combining TG4001 with avelumab in HPV16-positive recurrent and/or metastatic malignancies showed promising clinical activity in the overall study population (34 evaluable patients).

In addition, Transgene identified a selection criterion corresponding to patients showing particularly encouraging clinical activity. For more than 50% of these patients, the disease had not progressed at 12 weeks, compared to an expected median progression-free survival (PFS) of 8 weeks for this population with current treatment regimens or with immune checkpoint inhibitors in monotherapy. Responses are durable in most of the responder patients.

The purpose of this exploratory Phase 1b/2 trial was to evaluate the safety and efficacy of the combination of TG4001 and an immune checkpoint inhibitor in a heterogeneous group of patients with aggressive, recurrent, and/or metastatic HPV16-positive cancers. Key findings of the trial: The combination of TG4001 and avelumab demonstrates anti-tumor activity (23.5% ORR) in patients with previously treated recurrent and/or metastatic HPV-related cancers; the Presence of liver metastases has a profound impact on outcome in terms of ORR and PFS. In patients without liver metastases, an ORR of 34.8% and a median PFS of 5.6 months were achieved.

Transgene stated intends to pursue the development of TG4001 and is actively working on the preparation of a confirmatory clinical study.

Transgene is a France based clinical-stage biotechnology company focused on designing and developing novel immunotherapeutics.

TG4001 HPV Cancer Vaccine Indication

TG4001 is indicated to treat Human Papillomavirus (HPV) 16+ recurrent or metastatic malignancies, including oropharyngeal cancers. Therapeutic vaccines are active and targeted immunotherapeutics. They induce a cascade of immune reactions that lead to the production of T cells that will only destroy specific malignant cells, says the company.

TG4001 HPV Cancer Vaccine Dosage

Dosing levels are being evaluated in ongoing clinical trials. TG4001 is designed to have a two-pronged antiviral approach: to alert the immune system specifically to cells presenting the HPV16 E6 and E7 antigens, that can be found in HPV16-related tumors, and to further stimulate the infection-clearing activity of the immune system through interleukin 2 (IL-2). 

TG4001 HPV Cancer Vaccine News

October 27, 2020 - Transgene is communicating the content of the late-breaking poster abstract that will be presented at the SITC 35th Anniversary Annual Meeting (SITC 2020), to be held virtually November 9-14, 2020. The combination of TG4001 and avelumab demonstrates anti-tumor activity (23.5% ORR) in patients with previously treated recurrent and/or metastatic HPV-related cancers. And, the presence of liver metastases has a profound impact on outcome in terms of ORR and PFS. In patients without liver metastases, an ORR of 34.8% and a median PFS of 5.6 months were achieved.

October 19, 2020 - Transgene announced that detailed results of the data from the Phase 1b/2 trial combining TG4001 will be presented in a poster presentation at the upcoming virtual meeting of the Society for Immunotherapy of Cancer taking place November 9-14, 2020.

July 22, 2020 - Transgene performed a pooled analysis of the data from the Phase 1b/2 trial combining TG4001. This analysis confirms that TG4001 can be safely combined with an immune checkpoint inhibitor and shows the clinical activity of this combination regimen. The trial is being conducted in collaboration with Merck KGaA, Darmstadt, Germany, and Pfizer.

September 30, 2019 - Transgene presented promising safety and efficacy data of TG4001 in combination with avelumab (BAVENCIO®), a human anti-programmed death-ligand (PD-L1) antibody, in Human Papillomavirus (HPV) 16+ recurrent or metastatic malignancies, including oropharyngeal cancers.

April 4, 2019 - Study: The efficacy and safety of Tipapkinogen Sovacivec therapeutic HPV vaccine in cervical intraepithelial neoplasia grades 2 and 3: Randomized controlled phase II trial with 2.5 years of follow-up.

TG4001 HPV Cancer Vaccine Clinical Trials

Clinical Trial NCT03260023:  Phase Ib/II of TG4001 and Avelumab in HPV16 Positive R/M Cancers Including Oropharyngeal SCCHN (Recruiting)

The Phase 1b/2 study will consist of two parts :

  • In the phase Ib part: safety will be assessed in consecutive cohorts of 3 to 6 patients at increasing doses of TG4001 in combination with avelumab according to a 3+3 design. There will be no intra-patient dose escalation.
  • In the phase II part, evaluation of efficacy and further evaluation of the safety of the combination of TG4001 and avelumab will be performed.
  • In both parts, tumor response will be evaluated on local assessment using RECIST 1.1.
  • All patients will be followed up until disease progression or death due to any cause or the date of data cut-off, whichever occurs first.

Clinical Trial NCT01022346: A Study of RO5217790 in Participants With High-Grade Cervical Intraepithelial Neoplasia (CIN) Associated With High-Risk Human Papillomavirus (HR-HPV) Infection (Completed) 

  • This Phase 2 randomized, double-blind, placebo-controlled, parallel-arm study will assess the safety and efficacy of RO5217790 on the histologic resolution in participants with high-grade CIN associated with HR-HPV infection.
  • Participants will be randomized to receive 3 subcutaneous injections of either placebo or RO5217790 on Days 1, 8, and 15.
  • Study assessments will be made at Baseline, at Month 3 and 6, and every 6 months thereafter for an overall of 2.5 years.