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MelanomaPhase 2NCT04526730

Neoadjuvant Immunotherapy With Tavo + Electroporation in Combination With Nivo. in Melanoma Patients

A Phase 2 study testing Tavo, Nivolumab and OncoSec Medical Electroporation Therapy System in people with Melanoma, run by H. Lee Moffitt Cancer Center and Research Institute at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This is a Phase 2 open-label, single-arm study of neoadjuvant treatment of intratumoral tavo-EP plus nivolumab IV infusion. Eligible participants will be those with pathological diagnosis of operable locally-regionally advanced melanoma. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Melanoma
What is being tested?
Tavo, Nivolumab and OncoSec Medical Electroporation Therapy System
Could I receive a placebo?
No, everyone receives an active treatment
How many people
17 participants
Where
1 siteUnited States
Study dates
22 Dec 2020to 22 May 2025
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Participant must be ≥ 18 years of age inclusive, at the time of signing the informed consent
  • Histologic diagnosis of melanoma
  • Must be considered surgically operable and may present as any of the following groups:
  • Primary melanoma with clinically apparent regional lymph node metastases, confirmed by pathological diagnosis.
  • Clinically detected recurrence of melanoma at regional lymph node basin(s), confirmed by pathological diagnosis.
  • Clinically or histologically detected primary melanoma involving multiple regional nodal groups, confirmed by pathological diagnosis.
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  • Clinically detected single site of nodal metastatic melanoma arising from an unknown primary, confirmed by pathological diagnosis.
  • Participants with in transit or satellite metastases with or without lymph node involvement are allowed if they are considered surgically resectable at Screening by the treating surgical oncologist.
  • Participants with distant cutaneous/subcutaneous, soft tissue or nodal metastases with or without regional lymph node involvement are allowed if they are considered potentially surgically resectable and can be biopsied at Screening by the treating surgical oncologist. Elevated LDH is not an exclusion.
  • Participants are eligible for this study either at presentation for primary melanoma with concurrent regional nodal and/or in-transit or distant metastasis, or at the time of clinically detected nodal, in transit, or distant recurrence
  • Participants must be evaluated by standard-of-care full body imaging studies including positron emission tomography - computed tomography (PET-CT ;preferred; including diagnostic CT component if possible) or CT (if PET-CT cannot be done) as well as magnetic resonance imaging (MRI) of the brain (or CT if MRI cannot be done) as part of the initial clinical work-up at Screening (no more than 4 weeks prior to Cycle 1, Day 1).
  • Have measurable disease based on RECIST v1.1, with at least one anatomically distinct lesion. Lesion or lesions must meet all the following baseline criteria:
  • Accessible for electroporation
  • Must be measured in at least one dimension (longest diameter in the plane of measurement is to be recorded)
  • Greater than 3 mm
  • Contraceptive use by men or women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
  • Male Participants: Male subjects of childbearing potential must be surgically sterile, or must agree to use adequate method of contraception during the study and at least 5 months following the last day of study drug administration. Note: Abstinence is acceptable if this is the usual lifestyle and preferred contraception for the subject
  • Female participants: Women of childbearing potential must have negative serum or urine pregnancy test within 72 hours prior to receiving the first study drug administration. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required. For women of childbearing potential, must be willing to use an adequate method of contraception from 30 days prior to the first study drug administration and 5 months following last day study drug administration (either tavo or nivolumab); acceptable methods include hormonal contraception (oral contraceptives - as long as on stable dose, patch, implant, and injection), intrauterine devices, or double barrier methods (e.g. vaginal diaphragm/vaginal sponge plus condom, or condom plus spermicidal jelly), sexual abstinence or a vasectomized partner. Women may be surgically sterile or at least 1-year post-last menstrual period. Note: Abstinence is acceptable if this is the usual lifestyle and preferred contraception for the subject.
  • Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol

Who cannot join

  • Participant has a known additional malignancy that is progressing or requires active treatment. Exceptions include basal cell carcinoma of the skin, squamous cell carcinoma of the skin that has undergone potentially curative therapy or in situ cervical cancer. Also, includes patients who are considered disease-free for at least 3 years from the last definitive treatment for a second malignancy.
  • Participants who have Human Immunodeficiency Virus (HIV) (HIV 1/2 antibodies at Screening). HIV testing at screening is not required unless considered clinically indicated by the treating physician.
  • Participants who have active Hepatitis B (e.g., HBsAg reactive) or Hepatitis C (e.g., HCV RNA [qualitative] is detected at Screening); Note: Participants who have been vaccinated against Hepatitis B and who are positive only for the Hepatitis B surface antibody are permitted to participate in the study. Hepatitis B and C testing at screening is not required unless considered clinically indicated by the treating physician.
  • Participant has a diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of study drug. The use of physiologic doses of corticosteroids may be approved after consultation with the Principal Investigator.
  • Participant has a history of (non-infectious) pneumonitis that required steroids or current pneumonitis.
  • Participant has a history of interstitial lung disease.
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  • Participant has an active infection requiring systemic therapy.
  • Participant has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject's participation for the full duration of the trial, or is not in the best interest of the subject to participate, in the opinion of the treating investigator.
  • Participant has not recovered (i.e., > Grade 1 at Cycle 1, Day 1) from AEs due to a previously administered agent.
  • Participant has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the study.
  • Participants who are pregnant or breast feeding or expecting to conceive or father children within the projected duration of the trial, starting with the screening visit through 5 months after the last dose of trial treatment.
  • Participants with electronic pacemakers or defibrillators
  • Participants who have received a live-virus vaccination within 30 days of the first dose of treatment. Seasonal flu vaccines that do not contain live virus are permitted
  • Participants who have received transfusion of blood products (including platelets or red blood cells) or administration of colony stimulating factors (including G-CSF, GM-CSF or recombinant erythropoietin) within 4 weeks prior to study Cycle 1, Day 1.
  • Previous treatment with anti-PD1 or anti-PDL1 immunotherapy.
  • Participation in another clinical study and systemic therapy within 30 days of Cycle 1, Day 1.
  • ECOG Performance Status: >1
  • Inadequate organ function as defined per protocol
  • Participant has severe hypersensitivity (≥Grade 3) to nivolumab and/or any of its excipients

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Moffitt Cancer Center

    Tampa, Florida, 33612

Other trials in United States

About this study

Official title: Neoadjuvant Immunotherapy With Intratumoral Tavokinogene Telseplasmid (Tavo) Plus Electroporation in Combination With Intravenous Nivolumab in Patients With Operable Locally- Regionally Advanced Melanoma

This is a Phase 2 open-label, single-arm study of neoadjuvant treatment of intratumoral tavo-EP plus nivolumab IV infusion. Eligible participants will be those with pathological diagnosis of operable locally-regionally advanced melanoma.

Conditions
Melanoma
Being tested
Tavo, Nivolumab, OncoSec Medical Electroporation Therapy System
Keywords
Skin Cancer
Medical subject headings
Melanoma, Skin Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • TavoDrug

    Tavo will be injected on Days 1 and 8 every 4 weeks at a dose volume of ¼ of the calculated lesion volume with a minimum dose volume per lesion of 0.1 mL for lesions of volume <0.4 cm3

  • NivolumabDrug

    Nivolumab will be administered 480 mg every 4 weeks over 30 minute infusions

  • OncoSec Medical Electroporation Therapy SystemDevice

    Also called Electroporation

    The OMS (OncoSec Medical Electroporation Therapy System), a medical EP device system, consists of 3 components: 1. an Electroporation Generator that generates electric pulses, 2. a sterile Applicator Tip containing needle array, and 3. an Applicator Handle that connects to the Electroporation Generator at the proximal end and connects to the Applicator Tip at the distal end.

    Upon user activation of the attached Foot Switch, the OMS Electroporation Generator delivers controlled electrical pulses in a square wave pulse pattern yielding optimal transmembrane potential for electroporation to occur. EP pulses occur between 6 hexagonal opposing needle electrodes. After the first pulse, the polarity between the opposing needle electrode pairs is reversed and the needle pair is pulsed again. After the initial paired pulse, the pulse delivery is rotated clockwise to the next opposing needle pairs until a total of 6 pulses are delivered to complete the EP sequence.

Study groups in NCT04526730
Study groupRoleWhat they receive
Neoadjuvant TreatmentExperimentalNeoadjuvant Phase: (3 x 4-week cycles, total 12 weeks): At every cycle, intratumoral tavo-EP will be administered (on Days 1 and 8) concurrently with 480 mg nivolumab IV infusion on Day 8 of each cycle (tavo-EP will be administered prior to nivolumab infusion). Definitive Surgery Phase: Surgery may be scheduled about 2-4 weeks after the last dose of nivolumab following radiologic and clinical assessment at that point. Pathologic response will be determined by institutional pathologist. Adjuvant Phase: Adjuvant therapy with nivolumab monotherapy will begin approximately 2-4 weeks following definitive surgery; recovery from surgery is required (Day 1 of Cycle 4 will be determined by the treating investigator once the subject is cleared to initiate systemic therapy). Nivolumab (480 mg IV infusion on Day 1 of each 4-week cycle) will be administered for up to 9 cycles during the Adjuvant phase.
Receives: Drug: Tavo; Drug: Nivolumab; Device: OncoSec Medical Electroporation Therapy System

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Pathologic Complete Response

    For each subject, the study intervention consists of 3 phases: (1) Neoadjuvant Phase; (2) Surgery Phase; (3) Adjuvant Phase. Completion of all 3 phases is required for primary completion of the study. The study protocol requires that all subjects will be followed for 4 weeks after last dose of nivolumab at End of Study (EOS) visit. That is 4 weeks after the conclusion of the adjuvant phase. For the purpose of reporting the primary outcome measure, Pathologic Complete Response will be estimated based on the proportion of participants who have completed the study phases and were found to have no viable tumor on histologic assessment at definitive surgery after the 12- week Neoadjuvant phase. Surgery will then be scheduled 2-4 weeks after neoadjuvant phase. This will be followed by the adjuvant phase. Therefore, the proportion of participants who continue in Pathologic Complete Response following completion of the 3 study phases would be reported.

    Measured: At least four weeks after the last dose of nivolumab at End of Study (EOS) visit

Secondary outcomes (4)
  1. Objective Response Rate

    Preoperative ORR assessed by Investigator based on RECIST v1.1 at the conclusion of the Neoadjuvant phase.

    Measured: Conclusion of the neoadjuvant phase.

  2. Relapse Free Survival

    RFS assessed by Investigator based on RECIST v1.1 at least four weeks after the last dose of nivolumab at End of Study (EOS) visit.

    Measured: At least four weeks after the last dose of nivolumab at End of Study (EOS) visit

  3. Overall Survival

    Overall survival at 1 year after start of therapy.

    Measured: At 1 year after start of therapy

  4. Risk of Surgical Delay

    Definitive surgery will be planned at about 12 weeks. Participants will be monitored for surgical delay (either due to toxicity and/or tumor progression). Defined as the number of participants who had Surgery delayed due to progression.

    Measured: Up to 16 weeks after start or therapy

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted26 Aug 2020
  2. Study start22 Dec 2020
  3. Primary completion26 Mar 2024
  4. Study completion22 May 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
17 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04526730
Sponsor's protocol ID
MCC-20313
Status last verified
Jun 2026
First submitted
21 Aug 2020
Last updated
29 Jun 2026
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Tarhini AA, Eroglu Z, Eljilany I, Zager JS, Gonzalez RJ, Sarnaik AA, Cruse CW, Khushalani NI, De Aquino DB, Abraham E, Acevedo DM, Richards A, Schell MJ, Kalos D, Chen PL, Messina JL, Canton DA, Sondak VK. Neoadjuvant Intratumoral Plasmid IL-12 Electro-Gene-Transfer and Nivolumab in Patients with Operable, Locoregionally Advanced Melanoma. Clin Cancer Res. 2024 Dec 2;30(23):5333-5341. doi: 10.1158/1078-0432.CCR-24-2768.

    PubMed 39417680
  • Jacobs L, Yshii L, Junius S, Geukens N, Liston A, Hollevoet K, Declerck P. Intratumoral DNA-based delivery of checkpoint-inhibiting antibodies and interleukin 12 triggers T cell infiltration and anti-tumor response. Cancer Gene Ther. 2022 Jul;29(7):984-992. doi: 10.1038/s41417-021-00403-8. Epub 2021 Nov 9.

    PubMed 34754076

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Tavo, Nivolumab and OncoSec Medical Electroporation Therapy System in people with Melanoma, run by H. Lee Moffitt Cancer Center and Research Institute at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 19 inclusion and 19 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 29 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 6 May 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Pathologic Complete Response (time frame: At least four weeks after the last dose of nivolumab at End of Study (EOS) visit). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04526730, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Jun 2026.

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