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Small Cell Lung Cancer Extensive StagePhase 1/2Acclaim-3NCT05703971

Quaratusugene Ozeplasmid (Reqorsa) and Atezolizumab Maintenance Therapy in ES-SCLC Patients

A Phase 1/2 study testing quaratusugene ozeplasmid and atezolizumab in people with Small Cell Lung Cancer Extensive Stage, run by Genprex, Inc. at 17 sites in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This clinical trial will evaluate the combination of quaratusugene ozeplasmid with atezolizumab as maintenance therapy for patients with Extensive Stage Small Cell Lung Cancer (ES-SCLC). The study is comprised of 2 phases, a dose selection phase (Phase 1) and a safety and efficacy evaluation phase (Phase 2). Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Small Cell Lung Cancer Extensive Stage
What is being tested?
quaratusugene ozeplasmid and atezolizumab
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
62 participants
Where
17 sitesUnited States
Study dates
9 May 2024to Jun 2028
Phase
Phase 1/2
Are there results?
Not yet: the study is under way

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

  • Male or female aged ≥18 years.
  • Documented history of histologically or cytologically confirmed ES-SCLC, prior to starting treatment with the combination of atezolizumab, carboplatin, and etoposide
  • Complete Response (CR), Partial Response (PR), or Stable Disease (SD) after receiving at least three cycles, and no more than four cycles, of atezolizumab, carboplatin, and etoposide.
  • Eastern Cooperative Oncology Group performance status (ECOG PS) score from 0 to 1.
  • Must be ≥28 days beyond major surgical procedures such as thoracotomy, laparotomy, or joint replacement, and must not have evidence of wound dehiscence, active wound infection, or comparable major residual complications of the surgery per Investigator assessment.
  • Asymptomatic brain metastases must meet ALL criteria of the following (a-d):
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  • No history of seizures in the preceding six months.
  • Definitive treatment must be completed ≥21 days prior to enrollment.
  • Must be off steroids administered because of brain metastases or related symptoms for ≥7 days.
  • If had previous brain irradiation, post-treatment imaging must demonstrate stability or regression of the brain metastases.
  • Absolute neutrophil count (ANC) >1500/mm3, platelet count >100,000/mm3 within ≤28 days.
  • Adequate renal function documented by serum creatinine of ≤1.5 mg/dL or calculated creatinine clearance >50 ml/min within ≤28 days.
  • Adequate hepatic function as documented by serum bilirubin <1.5 mg/dL and aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5 X upper limit of normal (ULN) within ≤28 days.
  • Stable cardiac condition with a left ventricular ejection fraction ≥40% within ≤28 days.
  • If female of childbearing potential (FOCBP), must have negative serum pregnancy test (serum beta-human chorionic gonadotropin [β-hCG]) within ≤7 days of first dose.
  • FOCBP and non-sterile men who are sexually active with FOCBP must agree to use two forms of contraception including one highly effective and one effective methods beginning ≥2 weeks prior to enrollment through for four months following the last dose of study treatment.
  • If male, must agree to no sperm donation during study treatment and for an additional four months following the last dose of study treatment.
  • Must have voluntarily signed an informed consent in accordance with institutional policies.

Who cannot join

  • Unable to tolerate atezolizumab treatment, leading to early treatment discontinuation or prolonged/frequent dosage modifications in previous atezolizumab treatment as determined by the Investigator.
  • Received prior gene therapy.
  • Received prophylactic cranial irradiation or consolidation thoracic radiation.
  • Active systemic viral, bacterial, or fungal infection(s) requiring treatment.
  • Serious concurrent illness or psychological, familial, sociological, geographical, or other concomitant conditions that, in the opinion of the Investigator, would not permit adequate follow-up and compliance with the study protocol.
  • History of autoimmune disease requiring immunosuppression.
Show all 9Show fewer
  • History of myocardial infarction or unstable angina within ≤6 months.
  • Known human immunodeficiency virus (HIV) infection or has active hepatitis infection.
  • Female who is pregnant or breastfeeding

Trial locations and contacts

17 sites in 1 country. Contact the study team or a site near you to ask about taking part.

Sr Director, Clinical Operations contact

1-877-774-GNPX

kcombs@genprex.com

Chief Medical Officer contact

1-877-774-GNPX

mberger@genprex.com

17 sites in 1 country

United States17 sites, 16 recruiting
  • Gabrail Cancer Center Research

    Canton, Ohio, 44718

    Carrie Smith, 330-417-8231, csmith@gabrailcancercenter.com

    Kim Roby, 330.492.3345 ext. 227, kroby@gabrailcancercenter.com

    Recruiting
  • Oncology_Hematology Care Clinical Trials, LLC

    Cincinnati, Ohio, 45211

    Douglas Hart, douglas.hart@usoncology.com

    David M Waterhouse, MD

    Recruiting
  • Oncology_Hematology Care Clinical Trials, LLC

    Cincinnati, Ohio, 45236

    Douglas Hart, douglas.hart@usoncology.com

    David M Waterhouse, MD

    Recruiting
  • Oncology_Hematology Care Clinical Trials, LLC

    Cincinnati, Ohio, 45242

    Douglas Hart, douglas.hart@usoncology.com

    David M Waterhouse, MD

    Recruiting
  • Oncology_Hematology Care Clinical Trials, LLC

    Cincinnati, Ohio, 45245

    Douglas Hart, douglas.hart@usoncology.com

    David M Waterhouse, MD

    Recruiting
  • Texas Oncology - DFW

    Dallas, Texas, 75246

    Christine Terraciano, Christine.terraciano@usoncology.com

    Kartik Konduri, MD

    Recruiting
  • Willamette Valley Cancer Institute (Oregon)

    Eugene, Oregon, 97401

    Jeanne Schaffer, jeanne.schaffer@usoncology.com

    Bo Wang, MD

    Recruiting
  • Virginia Cancer Specialists, PC

    Fairfax, Virginia, 22031

    Carrie Friedman, carrie.friedman@usoncology.com

    Alexander I Spira, MD

    Recruiting
  • Oncology_Hematology Care Clinical Trials, LLC

    Fairfield, Ohio, 45014

    Douglas Hart, douglas.hart@usoncology.com

    David M Waterhouse, MD

    Recruiting
  • Rocky Mountain Cancer Centers, LLP

    Lone Tree, Colorado, 80124

    Jennifer Hege, jennifer.hege@usoncology.com

    Robert M Jotte, MD

    Recruiting
  • Northwest Cancer Specialists, P.C.

    Portland, Oregon, 97213-2982

    Jennifer Thompson, Jennifer.Thompson@usoncology.com

    Anthony Van Ho, MD

    Recruiting
  • Providence Cancer Institute

    Portland, Oregon, 97213

    Brenda Fisher, RN, 503-215-1979, canrsrchstudies@providence.org

    Rachel Sanborn, MD

    Recruiting
  • Northwest Cancer Specialists, P.C.

    Portland, Oregon, 97227

    Jennifer Thompson, Jennifer.Thompson@usoncology.com

    Anthony Van Ho, MD

    Recruiting
  • Washington University School of Medicine - Siteman Cancer Center

    St Louis, Missouri, 63110

    Medical Oncology Clinical Call Center, 314-747-1171, MedicalOncologyClinicalCallCenter@dom.wustl.edu

    Daniel Morgensztern, MD

    Recruiting
  • Northwest Cancer Specialists, P.C.

    Tigard, Oregon, 97223

    Jennifer Thompson, Jennifer.Thompson@usoncology.com

    Anthony Van Ho, MD

    Recruiting
  • Texas Oncology - Northeast Texas

    Tyler, Texas, 75702

    Shelly Maxfield, shelly.maxfield@usoncology.com

    Donald A Richards, MD

    Recruiting
  • Northwest Cancer Specialists, P.C.

    Vancouver, Washington, 98684

    Terminated

Other trials in United States

About this study

Official title: A Phase 1/2 Clinical Trial of Quaratusugene Ozeplasmid and Atezolizumab Maintenance Therapy in Patients With Extensive Stage Small Cell Lung Cancer (ES-SCLC)

This clinical trial will evaluate the combination of quaratusugene ozeplasmid with atezolizumab as maintenance therapy for patients with Extensive Stage Small Cell Lung Cancer (ES-SCLC).

The study is comprised of 2 phases, a dose selection phase (Phase 1) and a safety and efficacy evaluation phase (Phase 2).

Read the detailed description

Acclaim-3 is an open-label, multi-center, Phase 1/2 study evaluating the combination of quaratusugene ozeplasmid with atezolizumab as maintenance therapy for patients with ES-SCLC who did not develop tumor progression after receiving at least 3 cycles, and no more than 4 cycles, of induction therapy with carboplatin plus etoposide and atezolizumab.

Toxicities will be assessed by the Investigator using United States National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE), version 5.0. Serious Adverse Events and Dose Limiting Toxicities (DLTs) will be reviewed by a safety review committee.

Phase 1: Enrollment in Phase 1 is complete and the recommended Phase 2 dose (RP2D) of quaratusugene ozeplasmid when given in combination with atezolizumab was determined.

Phase 2: Enrollment has been initiated and enrolled patients are treated with quaratusugene ozeplasmid at the RP2D in combination with atezolizumab.

Being tested
quaratusugene ozeplasmid, atezolizumab
Keywords
atezolizumab, atezolizumab and hyaluronidase-tqjs, Tumor Suppressor Gene 2 (TUSC2), Lipid Nanoparticle (LNP), Gene Therapy, TECENTRIQ, ES-SCLC, REQORSA, quaratusugene ozeplasmid

What participants receive

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

  • quaratusugene ozeplasmidBiological

    Also called REQORSA

    Quaratusugene ozeplasmid is an experimental nonviral immunogene therapy utilizing the TUSC2 gene, designed to target cancer cells by interrupting cell signaling pathways that allow cancer cells to grow, reestablishing pathways that promote cancer cell death and modulating the immune response against cancer cells.

  • atezolizumabBiological

    Also called TECENTRIQ

    Atezolizumab is a monoclonal antibody that belongs to a class of drugs that binds to the programmed death-receptor 1 ligand 1 (PD-L1), blocking the PD-1/PD-L1 pathway, thereby removing inhibition of the immune response, potentially breaking peripheral tolerance and inducing immune-mediated adverse reactions.

Study groups in NCT05703971
Study groupRoleWhat they receive
Phase 1ExperimentalUp to 2 sequential dose selection cohorts will be treated with quaratusugene ozeplasmid (intravenous (IV) administration once every 21 days) plus atezolizumab (1200 mg IV administration once every 21 days) until disease progression or unacceptable toxicity. Quaratusugene ozeplasmid doses will be evaluated (0.09 [starting dose], and 0.12 mg/kg) until the RP2D is identified.
Receives: Biological: quaratusugene ozeplasmid; Biological: atezolizumab
Phase 2ExperimentalPatients will be treated with the RP2D of quaratusugene ozeplasmid (IV administration once every 21 days) plus atezolizumab (1200 mg IV administration once every 21 days) or atezolizumab and hyaluronidase-tqjs (15 mL subcutaneous [SQ] administration once every 21 days) until disease progression or unacceptable toxicity
Receives: Biological: quaratusugene ozeplasmid; Biological: atezolizumab

What is being measured

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

  1. Maximum Tolerated Dose (MTD)/Recommended Phase 2 Dose (RP2D) - Phase 1

    The MTD and/or RP2D of the combination of quaratusugene ozeplasmid and atezolizumab.

    Note: if a MTD is not determined, the RP2D will be selected based on all available data (safety, PK, PD, and preliminary efficacy).

    Measured: First 21-days at each dose level

  2. Progression-Free Survival Rate (PFSR) - Phase 2

    PFSR at 18 weeks according to Response Evaluation Criteria in Solid Tumors, version 1.1 (RECIST 1.1).

    Measured: 18-weeks from Day 1 of maintenance therapy

Secondary outcomes (4)
  1. Safety Profile - Phase 1

    Adverse events according to CTCAE v5.0

    Measured: Approximately 6 months

  2. Progression-free Survival (PFS) - Phase 1 & Phase 2

    PFS per RECIST 1.1. PFS is defined as time from Day 1 of maintenance therapy to disease progression or death.

    Measured: Approximately 5 months

  3. Pharmacokinetics (PK) of Quaratusugene Ozeplasmid - Phase 1 & Phase 2

    Concentration of quaratusugene ozeplasmid in whole blood samples.

    Measured: First 21-day treatment cycle

  4. Overall Survival (OS) - Phase 1 & Phase 2

    Number of months from Day 1 of maintenance therapy to the date of death.

    Measured: Approximately 18 months

Timeline

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

  1. First posted30 Jan 2023
  2. Study start9 May 2024
  3. Primary completionDec 2027 (estimated)
  4. Study completionJun 2028 (estimated)

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 1/2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Model description
Phase 1: 3+3 dose selection to identify RP2D. Phase 2: open label, non-randomized treatment with quaratusugene ozeplasmid at RP2D in combination with atezolizumab.
Masking
None (open label)
Enrolment
62 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05703971
Sponsor's protocol ID
ONC-005
Acronym
Acclaim-3
Status last verified
Sep 2026
First submitted
19 Jan 2023
Last updated
11 Sep 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing quaratusugene ozeplasmid and atezolizumab in people with Small Cell Lung Cancer Extensive Stage, run by Genprex, Inc. at 17 sites 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 18 inclusion and 9 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: looking for participants now, as of the sponsor's last update on 11 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 17 sites 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 combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

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?

This study is still under way. Results are not available in the source record yet.

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

Contact Sr Director, Clinical Operations (1-877-774-GNPX, kcombs@genprex.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Maximum Tolerated Dose (MTD)/Recommended Phase 2 Dose (RP2D) - Phase 1 (time frame: First 21-days at each dose level). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
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 11 Sep 2026.

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