Neoplasms, BrainPhase 1NCT03911388
HSV G207 in Children With Recurrent or Refractory Cerebellar Brain Tumors
A Phase 1 study testing G207 in people with Neoplasms, Brain and Glioblastoma Multiforme, run by M.D. Anderson Cancer Center at 3 sites in United States.
Trial summary
This study is a clinical trial to determine the safety of inoculating G207 (an experimental virus therapy) into a recurrent or refractory cerebellar brain tumor. The safety of combining G207 with a single low dose of radiation, designed to enhance virus replication, tumor cell killing, and an anti-tumor immune… Read more about this study
- Who is it for?
- Ages 36 months to 22 years
- Conditions the study is for
- Neoplasms, Brain, Glioblastoma Multiforme, Glioblastoma of Cerebellum
- What is being tested?
- G207
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 24 participants
- Where
- 3 sitesUnited States
- Study dates
- 12 Sep 2019to 1 Sep 2027
- Phase
- Phase 1
- 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 36 months to 22 years
- All sexes
- No healthy volunteers
- Child, Adult
Who may be able to join
- Age ≥ 36 months and < 22 years
- Pathologically proven malignant cerebellar brain tumor (including medulloblastoma, glioblastoma multiforme, giant cell glioblastoma, anaplastic astrocytoma, primitive neuroectodermal tumor, ependymoma, atypical teratoid/rhabdoid tumor, germ cell tumor, or other high-grade malignant tumor) which is progressive or recurrent despite standard care including surgery, radiotherapy, and/or chemotherapy. A pathologically proven secondary malignant cerebellar tumor without curative treatment options is eligible.
- A review of the MRI scan will be necessary to determine if the tumor location and size are such that the patient may be included in the study. The MRI scan must be reviewed and approved by the site neurosurgeon and/or study radiologist for enrollment. The following guidelines must be met: Lesion must be ≤ 3.0 cm in diameter and surgically accessible as determined by MRI. Larger tumors may be surgically debulked and treated if ≤ 3.0 cm after debulking. Tumor measurements should be confirmed on the Immunotherapy Response Assessment in Neuro-Oncology (iRANO) form or the institutional MRI report
- Patients must have fully recovered from acute treatment-related toxicities of all prior chemotherapy, immunotherapy or radiotherapy prior to the date of G207 administration. All washout intervals below are measured relative to the date of G207 administration.
- Myelosuppressive chemotherapy: patients must have received their last dose at least 3 weeks prior (or at least 6 weeks if nitrosurea) to G207 administration.
- Monoclonal antibodies: patient must have received the last dose ≥ 21 days prior to G207 administration
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- Investigational/Biologic agents: patients must have recovered from any acute toxicities potentially related to the agent and received last dose ≥ 7 days prior to G207 administration (this period must be extended beyond the time during which adverse events are known to occur for agents with known adverse events ≥>= 7 days).
- Viral therapy: Patients must have received viral therapy ≥ 3 months prior to G207 administration and must have recovered from all acute toxicities potentially related to the agent
- Radiation: Patients must have received their last fraction of craniospinal radiation (>24 Gy) or total body irradiation ≥ 3 months prior to G207 administration. Patients must have received focal radiation to symptomatic metastatic sites or local palliative radiation ≥ 28 days prior to G207 administration.
- Autologous bone marrow transplant: Patients must be ≥ 3 months since transplant prior to G207 administration.
- Absolute neutrophil count > 1000/mm3
- Platelets ≥ 100,000/mm^3
- Prothrombin time (PT) or partial thromboplastin time (PTT) ≤ 1.3 x control
- Creatinine within normal institutional limits OR creatinine clearance >60 mL/min/1.73 m^2 for patients with creatinine levels above institutional normal
- Total bilirubin ≤ 1.5 mg/dl
- Transaminases ≤ 3 times above the upper limits of the institutional norm
- Patients < 16 years, Modified Lansky performance score ≥ 60; patients ≥ 16 years, Karnofsky performance score ≥ 60
- Written informed consent in accordance with institutional and Food and Drug Administration (FDA) guidelines must be obtained from patient or legal guardian
Who cannot join
- Acute infection, granulocytopenia or medical condition precluding surgery
- Pregnant or lactating females
- Diagnosis of encephalitis or central nervous system (CNS) infection ≤ 3 months prior
- Receiving ongoing treatment for encephalitis, CNS infection or multiple sclerosis
- Tumor involvement which would require ventricular or brainstem inoculation or would require access through a ventricle in order to deliver treatment
- Patient requires an escalation in ongoing systemic corticosteroid therapy within 7 days prior to G207 inoculation or requires ongoing systemic corticosteroid therapy at a dose > 2 mg/day of dexamethasone (or equivalent) at the time of inoculation. For this study, 'systemic corticosteroids' include oral, intravenous, or intramuscular formulations. A single, non-consecutive dose does not constitute exclusion. Physiologic corticosteroid replacement therapy (e.g., hydrocortisone for adrenal insufficiency) is not considered immunosuppressive and does not constitute exclusion
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- Known human immunodeficiency virus (HIV) seropositivity
- Concurrent therapy with any drug active against herpes simplex virus (HSV) (acyclovir, valacyclovir, penciclovir, famciclovir, ganciclovir, foscarnet, cidofovir) or any immunosuppressive drug therapy (except dexamethasone or prednisone)
- Patients with a prior or concurrent malignancy whose natural history or treatment has the potential to interfere with the safety or efficacy assessment of the investigational regimen for this trial
- Concurrent anticancer or investigational drug
Trial locations and contacts
3 sites in 1 country. Contact the study team or a site near you to ask about taking part.
Gregory K Friedman, MD contact
United States3 sites, 3 recruiting
- Recruiting
University of Alabama at Birmingham Cancer Center
Birmingham, Alabama, 35233
Laura K Metrock, MD, 205-638-9285, metrock@uabmc.edu
James Johnston, MD
- Recruiting
MD Anderson Cancer Center
Houston, Texas, 77030
Kara Kachurak, CRNP, 832-750-5661, kgkachurak@mdanderson.org
Gregory Friedman, MD, gkfriedman@mdanderson.org
- Recruiting
Siteman Cancer Center at Washington University
St Louis, Missouri, 63110
Mohamed Abdelbaki, MD, (314) 454-2002, MohamedA@wustl.edu
Mohamed Abdelbaki, MD
About this study
Official title: Phase 1 Trial of Engineered HSV G207 in Children With Recurrent or Refractory Cerebellar Brain Tumors
This study is a clinical trial to determine the safety of inoculating G207 (an experimental virus therapy) into a recurrent or refractory cerebellar brain tumor. The safety of combining G207 with a single low dose of radiation, designed to enhance virus replication, tumor cell killing, and an anti-tumor immune response, will also be tested.
Funding Source- FDA OOPD
Read the detailed description
Outcomes for children with recurrent or progressive cerebellar malignant brain tumors are very poor, and there are a lack of effective salvage therapies once a patient fails standard treatments. G207 is an oncolytic herpes simplex virus-1 (HSV) that has been successfully engineered to introduce mutations in the virus that enable it to selectively replicate in and kill cancer cells, but not normal cells. Replication of G207 in the tumor not only kills the infected tumor cells, but causes the tumor cell to act as a factory to produce new virus. These virus particles are released as the tumor cell dies, and can then proceed to infect other tumor cells in the vicinity, and continue the process of tumor kill. In addition to this direct oncolytic activity, the virus engenders an anti-tumor immune response; the virus is immunogenic and produces a debris field which exposes cancer cell antigens to immune cells which can target other cancer cells. Thus, the oncolytic effect of the virus and the immune response that the virus stimulates provide a "one-two punch" at attacking cancer cells. In preclinical studies, a single 5 Gy dose of radiation within 24 hours of virus inoculation to the tumor increased virus replication and tumor cell killing.
The safety of G207 has been demonstrated in 3 phase I clinical trials involving adults with supratentorial high-grade gliomas adults at the University of Alabama (UAB) and in an ongoing (closed to accrual) phase I clinical trial involving children with recurrent supratentorial brain tumors at Children's of Alabama. In the adult trials, high doses (up to 3 x 10^9 plaque-forming units) of virus were safely injected directly into the tumor or surrounding brain tissue without serious toxicities. Radiographic and neuropathologic evidence of anti-tumor responses have been seen. Preclinical laboratory studies have demonstrated that a variety of aggressive pediatric brain tumor types are sensitive to G207.
This study is a phase I, open-label, single institution clinical trial of G207 alone or combined with a single low dose of radiation in children and young adults, ages 3 to 21 years, with recurrent or progressive cerebellar brain tumors. The primary goal is to determine safety. The secondary aims are to obtain preliminary information on the effectiveness of and immune response to G207. A traditional 3 + 3 design will be used with four patient cohorts. The first cohort will receive G207 alone, and the next cohorts will receive G207 at one of three doses followed by a 5 Gy dose of radiation to active areas of tumor.
- Conditions
- Neoplasms, Brain, Glioblastoma Multiforme, Glioblastoma of Cerebellum, Neoplasms, Astrocytoma, Astrocytoma, Cerebellar
- Being tested
- G207
- Keywords
- Brain Tumor, Recurrent, Glioma, Glioblastoma Multiforme, Gliosarcoma, Medulloblastoma, Anaplastic Astrocytoma, Oligodendroglioma, Rhabdoid Tumor, Ependymoma, Germ Cell Tumor, Choroid Plexus Carcinoma, Cerebral Primitive Neuroectodermal Tumor, Giant Cell Glioblastoma, Atypical teratoid/rhabdoid tumor, Secondary Malignant Cerebellar Tumor, Embryonal Tumor, Neoplasms, Oncolytic Virus Therapy, Virotherapy, Oncolytic, Immunotherapy
- Medical subject headings
- Brain Neoplasms, Glioblastoma, Neoplasms, Astrocytoma, Neuroectodermal Tumors, Neuroectodermal Tumors, Primitive, Medulloblastoma, Cerebellar Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
G207Biological
Also called HSV G207
Single dose of G207 infused through catheters into region(s) of tumor. If G207 is safe in the first cohort of patients, subsequent patients will receive a single dose of G207 infused through catheters into region(s) of tumor followed by a 5 Gy dose of radiation to the tumor (which includes progressive leptomeningeal disease or any site of gross tumor progressing in the brain parenchyma) within 24 hours of virus inoculation.
| Study group | Role | What they receive |
|---|---|---|
| HSV G207 | Experimental | Single dose of HSV-1 (G207) infused through catheters into region(s) of tumor. If G207 is safe in the first cohort of patients, subsequent patients will receive a single dose of G207 infused through catheters into region(s) of tumor followed by a 5 Gy dose of radiation to the tumor given with 24 hours of virus inoculation. Receives: Biological: G207 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Safety and Tolerability as Measured by Frequency of Grade 3 or Above Adverse Events
All events with a Grade 3 or above toxicity (defined by the CTCAE v5.0) will be tabulated by event and by relationship to G207.
Measured: Baseline to 15 years
Secondary outcomes (6)
Immunologic Response
HSV-1 antibody titers will be checked by ELISA prior to the administration of G207 and at regular intervals after treatment.
Measured: 24 months
Virologic Shedding
HSV-1 antibody titers will be checked by ELISA prior to the administration of G207 and at regular intervals after treatment.
Measured: Up to 15 years
Progression Free Survival
Time after G207 administration to clinical and radiographic disease progression will be evaluated.
Measured: Up to 15 years
Overall Survival
The overall survival for each patient receiving G207 will be calculated
Measured: Up to 15 years
Change in Performance Score (Ability to Perform Normal Activities)
A modified Lansky score (for children under 16 years of age) or Karnofsky score (for children 16 and older) will be recorded pre-treatment and measured serially at regular intervals after treatment. The score is a standard performance score that measures overall function of the child with a scale range from 0 (lowest, poorest performance score) to 100 (highest, best performance).
Measured: Baseline to 15 years
Quality of Life (optional)
Quality of life will be measured with questionnaires taken at baseline (before administration of G207) and at specified times thereafter.
Measured: Up to 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted11 Apr 2019
- Study start12 Sep 2019
- Primary completion1 Sep 2026 (estimated)
- Study completion1 Sep 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Neoplasms, BrainStudies of the same condition, open and under way.
- More trials run by M.D. Anderson Cancer CenterThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- A traditional 3 + 3 design will be used with four patient cohorts.
- Masking
- None (open label)
- Enrolment
- 24 participants (estimated)
Sponsor and investigators
- Lead sponsor
- M.D. Anderson Cancer Center
- Sponsor type
- University, hospital or other
- Collaborators
- Cannonball Kids' Cancer Foundation, Treovir, Inc
- Responsible party
- Sponsor
- Investigators
- Gregory Friedman, MD, Principal investigator, M.D. Anderson Cancer Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03911388
- Sponsor's protocol ID
- 2023-0688
- Other IDs
- R01FD006368, NCI-2021-00011
- Status last verified
- Aug 2026
- First submitted
- 9 Apr 2019
- Last updated
- 4 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 4 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Phase 1 Trial of Engineered HSV G207 in Children With Recurrent or Refractory Cerebellar Brain Tumors
- ClinicalTrials.gov ID
- NCT03911388
- Acronym / sponsor ID
- 2023-0688
- Conditions
- Neoplasms, Brain, Glioblastoma Multiforme, Glioblastoma of Cerebellum, Neoplasms, Astrocytoma, Astrocytoma, Cerebellar
- Keywords
- Brain Tumor, Recurrent, Glioma, Glioblastoma Multiforme, Gliosarcoma, Medulloblastoma, Anaplastic Astrocytoma, Oligodendroglioma, Rhabdoid Tumor
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 24 participants (estimated)
- Lead sponsor
- M.D. Anderson Cancer CenterUniversity, hospital or other
- Collaborators
- Cannonball Kids' Cancer Foundation, Treovir, Inc
- Study start
- 12 Sep 2019 (actual)
- Primary completion
- 1 Sep 2026 (estimated)
- Study completion
- 1 Sep 2027 (estimated)
- First posted
- 11 Apr 2019 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study is a clinical trial to determine the safety of inoculating G207 (an experimental virus therapy) into a recurrent or refractory cerebellar brain tumor. The safety of combining G207 with a single low dose of radiation, designed to enhance virus replication, tumor cell killing, and an anti-tumor immune response, will also be tested.
Funding Source- FDA OOPD
Detailed description
Outcomes for children with recurrent or progressive cerebellar malignant brain tumors are very poor, and there are a lack of effective salvage therapies once a patient fails standard treatments. G207 is an oncolytic herpes simplex virus-1 (HSV) that has been successfully engineered to introduce mutations in the virus that enable it to selectively replicate in and kill cancer cells, but not normal cells. Replication of G207 in the tumor not only kills the infected tumor cells, but causes the tumor cell to act as a factory to produce new virus. These virus particles are released as the tumor cell dies, and can then proceed to infect other tumor cells in the vicinity, and continue the process of tumor kill. In addition to this direct oncolytic activity, the virus engenders an anti-tumor immune response; the virus is immunogenic and produces a debris field which exposes cancer cell antigens to immune cells which can target other cancer cells. Thus, the oncolytic effect of the virus and the immune response that the virus stimulates provide a "one-two punch" at attacking cancer cells. In preclinical studies, a single 5 Gy dose of radiation within 24 hours of virus inoculation to the tumor increased virus replication and tumor cell killing.
The safety of G207 has been demonstrated in 3 phase I clinical trials involving adults with supratentorial high-grade gliomas adults at the University of Alabama (UAB) and in an ongoing (closed to accrual) phase I clinical trial involving children with recurrent supratentorial brain tumors at Children's of Alabama. In the adult trials, high doses (up to 3 x 10^9 plaque-forming units) of virus were safely injected directly into the tumor or surrounding brain tissue without serious toxicities. Radiographic and neuropathologic evidence of anti-tumor responses have been seen. Preclinical laboratory studies have demonstrated that a variety of aggressive pediatric brain tumor types are sensitive to G207.
This study is a phase I, open-label, single institution clinical trial of G207 alone or combined with a single low dose of radiation in children and young adults, ages 3 to 21 years, with recurrent or progressive cerebellar brain tumors. The primary goal is to determine safety. The secondary aims are to obtain preliminary information on the effectiveness of and immune response to G207. A traditional 3 + 3 design will be used with four patient cohorts. The first cohort will receive G207 alone, and the next cohorts will receive G207 at one of three doses followed by a 5 Gy dose of radiation to active areas of tumor.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- A traditional 3 + 3 design will be used with four patient cohorts.
| Arm | Type | Receives |
|---|---|---|
| HSV G207 | Experimental | Biological: G207Single dose of HSV-1 (G207) infused through catheters into region(s) of tumor. If G207 is safe in the first cohort of patients, subsequent patients will receive a single dose of G207 infused through catheters into region(s) of tumor followed by a 5 Gy dose of radiation to the tumor given with 24 hours of virus inoculation. |
Who may qualify
- Ages
- 36 months to 22 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult
Key inclusion criteria (18 listed)
- Age ≥ 36 months and < 22 years
- Pathologically proven malignant cerebellar brain tumor (including medulloblastoma, glioblastoma multiforme, giant cell glioblastoma, anaplastic astrocytoma, primitive neuroectodermal tumor, ependymoma, atypical teratoid/rhabdoid tumor, germ cell tumor, or other high-grade malignant tumor) which is progressive or recurrent despite standard care including surgery, radiotherapy, and/or chemotherapy. A pathologically proven secondary malignant cerebellar tumor without curative treatment options is eligible.
- A review of the MRI scan will be necessary to determine if the tumor location and size are such that the patient may be included in the study. The MRI scan must be reviewed and approved by the site neurosurgeon and/or study radiologist for enrollment. The following guidelines must be met: Lesion must be ≤ 3.0 cm in diameter and surgically accessible as determined by MRI. Larger tumors may be surgically debulked and treated if ≤ 3.0 cm after debulking. Tumor measurements should be confirmed on the Immunotherapy Response Assessment in Neuro-Oncology (iRANO) form or the institutional MRI report
- Patients must have fully recovered from acute treatment-related toxicities of all prior chemotherapy, immunotherapy or radiotherapy prior to the date of G207 administration. All washout intervals below are measured relative to the date of G207 administration.
- Myelosuppressive chemotherapy: patients must have received their last dose at least 3 weeks prior (or at least 6 weeks if nitrosurea) to G207 administration.
Key exclusion criteria (10 listed)
- Acute infection, granulocytopenia or medical condition precluding surgery
- Pregnant or lactating females
- Diagnosis of encephalitis or central nervous system (CNS) infection ≤ 3 months prior
- Receiving ongoing treatment for encephalitis, CNS infection or multiple sclerosis
- Tumor involvement which would require ventricular or brainstem inoculation or would require access through a ventricle in order to deliver treatment
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| G207Also: HSV G207Single dose of G207 infused through catheters into region(s) of tumor. If G207 is safe in the first cohort of patients, subsequent patients will receive a single dose of G207 infused through catheters into region(s) of tumor followed by a 5 Gy dose of radiation to the tumor (which includes progressive leptomeningeal disease or any site of gross tumor progressing in the brain parenchyma) within 24 hours of virus inoculation. | Biological | HSV G207 |
Primary outcome
Safety and Tolerability as Measured by Frequency of Grade 3 or Above Adverse Events
Time frame: Baseline to 15 years
All events with a Grade 3 or above toxicity (defined by the CTCAE v5.0) will be tabulated by event and by relationship to G207.
6 secondary outcomes
Immunologic Response
Time frame: 24 months
Virologic Shedding
Time frame: Up to 15 years
Progression Free Survival
Time frame: Up to 15 years
Overall Survival
Time frame: Up to 15 years
Change in Performance Score (Ability to Perform Normal Activities)
Time frame: Baseline to 15 years
Quality of Life (optional)
Time frame: Up to 12 months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Sep 2026.
- MD Anderson Cancer CenterLink provided by the sponsor.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Gregory K Friedman, MD contact
Gregory Friedman, MD principal investigator
M.D. Anderson Cancer Center
3 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing G207 in people with Neoplasms, Brain and Glioblastoma Multiforme, run by M.D. Anderson Cancer Center at 3 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 10 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 4 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 3 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 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.
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 Kara Kachurak, CRNP (832-750-5661l, kgkachurak@mdanderson.org), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Safety and Tolerability as Measured by Frequency of Grade 3 or Above Adverse Events (time frame: Baseline to 15 years). 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 4 Sep 2026.