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Metastatic Breast Cancer in the SpinePhase 2ZGMBCNCT05280067

ZETAMET™ BONE GRAFT IN THE REPAIR OF BONE DEFECTS FROM METASTATIC BREAST CANCER IN VERTEBRAL BONES

A Phase 2 study testing ZetaMet™ (ZetaFuse™ Bone Graft) in people with Metastatic Breast Cancer in the Spine, run by Zetagen Therapeutics, Inc at 2 sites in Canada.

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

ZetaMet™ is indicated for patients with destructive, lytic lesions due to metastatic breast cancer to bone, with or without involvement of other sites, with at least one metastatic lesion located in a vertebral body of the spine, and a Spinal Instability Neoplastic Score (SINS) ≥3 and ≤9. Read more about this study

Who is it for?
Ages 22 to 75 years, women only
Conditions the study is for
Metastatic Breast Cancer in the Spine
What is being tested?
ZetaMet™ (ZetaFuse™ Bone Graft)
Could I receive a placebo?
No, everyone receives an active treatment
How many people
10 participants
Where
2 sitesCanada
Study dates
1 Sep 2022to 10 Oct 2025
Phase
Phase 2
Are there results?
None posted in the registry

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 22 to 75 years
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age between 22 (inclusive) and 75 years (inclusive) at the time of enrollment.
  • Life expectancy of 12 months or more.
  • Female patient with histologically confirmed diagnosis of primary breast cancer.
  • Metastatic breast cancer to bone, with or without involvement of other sites (patients with single metastasis qualify)
  • At least one lytic metastatic lesion located in the vertebral body of the spine.
  • Normal spinal alignment.
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  • SINS ≥3 and ≤9.
  • Signed and dated Informed Consent Form (ICF).
  • Patient is willing and able to participate in required follow-up visits at the Investigational Site and to complete study procedures and questionnaires.

Who cannot join

  • Vertebral body collapse.
  • Spinal cord compression.
  • Known allergy to Investigational Device materials.
  • Using medications or any drug known to potentially interfere with bone/soft tissue healing (e.g., chronic systemic steroids).
  • Current tobacco smoker or stopped smoking in past 6 months.
  • Uncontrolled diabetes mellitus, HbAIC cutoff.
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  • An active systemic infection (e.g., hepatitis, acquired immunodeficiency syndrome (AIDS), AIDS-related complex (ARC).
  • Currently participating in any investigational trial not related to this trial.
  • Any other severe acute or chronic medical condition that may interfere with the interpretation of the trial results, in the judgment of the PI, which would make the patient inappropriate for entry into this trial.
  • Pregnant or planning to become pregnant during the trial.

Trial locations and contacts

2 sites in 1 country.

Canada2 sites
  • McGill University Health Center

    Montreal, Quebec, H3G1A4

  • Vancouver Coastal Health Research Institute

    Vancouver, British Columbia, V5Z 1M9

Other trials in Canada

About this study

Official title: FEASIBILITY STUDY OF ZETAMET™ BONE GRAFT IN THE REPAIR OF BONE DEFECTS FROM METASTATIC BREAST CANCER IN THE SPINAL VERTEBRAL BODY: A PHASE 2A, MULTICENTER, OPEN-LABELED, SINGLE-ARM STUDY

ZetaMet™ is indicated for patients with destructive, lytic lesions due to metastatic breast cancer to bone, with or without involvement of other sites, with at least one metastatic lesion located in a vertebral body of the spine, and a Spinal Instability Neoplastic Score (SINS) ≥3 and ≤9. ZetaMet™ is percutaneously implanted into the bone defect created by the metastatic tumor in a spinal vertebral body. ZetaMet™ is only for implantation into the vertebral body.

Read the detailed description

This is an open-label single-arm study. Subjects (N=10) will be recruited from up to 4 Investigational Sites in Canada. Key inclusion criteria are metastatic breast cancer to bone with at least one lytic metastatic lesion located in a vertebral body of the spine and a SINS ≥3 and ≤9. ZetaMet™ will be percutaneously implanted into the vertebral body defect(s) created by the lytic metastatic tumor. Post-operative care will be per standard of care (SOC) at the Investigational Site. Subjects will be followed for 180 days post-treatment. If post-surgical radiation treatment is planned, it should not occur for at least 84 days post-surgery to allow for bone formation.

Being tested
ZetaMet™ (ZetaFuse™ Bone Graft)
Keywords
Metastatic Breast Cancer, Bone Metastases, Spine Metastases, Vancouver, Metastatic Breast Cancer to Bone, X-radiation therapy
Medical subject headings
Breast Neoplasms

What participants receive

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

  • ZetaMet™ (ZetaFuse™ Bone Graft)Combination product

    ZetaMet™ (ZetaFuse™ Bone Graft) will be percutaneously implanted into the vertebral body defect(s) created by the lytic metastatic tumor.

Study groups in NCT05280067
Study groupRoleWhat they receive
Investigational Device ZetaMet™ExperimentalZetaMet™ is percutaneously implanted into the bone defect created by the metastatic tumor in a spinal vertebral body. ZetaMet™ is only for implantation into the vertebral body.
Receives: Combination Product: ZetaMet™ (ZetaFuse™ Bone Graft)

What is being measured

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

  1. Number of Skeletal Related Events (SREs)

    SREs include pathologic fracture, spinal cord compression, radiation therapy to bone, or surgical intervention.

    Measured: Day 0 up to Day 180

  2. Number of subjects with at least one adverse event (AE)

    An AE is any unfavorable sign, symptom, or disease temporally associated with study participation, including the use of the Investigational Device and all study procedures. An AE may or may not be related to the use of the Investigational Device or a study procedure. AEs may include abnormal laboratory findings, radiologic events, medical complications, and changes from baseline in the subject's condition.

    Measured: Day 0 up to Day 180

  3. Number of subjects with at least one procedure-related AE

    A procedure-related AE is any unfavorable sign, symptom, or disease temporally associated with any study procedure. These AEs may include abnormal laboratory findings, radiologic events, medical complications, and changes from baseline in the subject's condition, related to any study procedure.

    Measured: Day 0 up to Day 180

  4. Number of subjects with at least one device-related AE

    A device-related AE is any unfavorable sign, symptom, or disease temporally associated with the Investigational Device. These AEs may include abnormal laboratory findings, radiologic events, medical complications, and changes from baseline in the subject's condition, related to the Investigational Device.

    Measured: Day 0 up to Day 180

  5. Change in SINS assessment at 21 days compared to baseline

    The SINS is a scoring system based on six parameters; one for pain and five radiographic parameters (location, bone lesion quality, spinal alignment, vertebral body collapse and involvement of posterolateral elements). The SINS ranges 0-18. Score in range 0-6 denote stability; 7-12 intermediate instability and 13-18 instability.

    Measured: Day 0 to Day 21 postoperatively

  6. Change in SINS assessment at 42 days compared to baseline

    The SINS is a scoring system based on six parameters; one for pain and five radiographic parameters (location, bone lesion quality, spinal alignment, vertebral body collapse and involvement of posterolateral elements). The SINS ranges 0-18. Score in range 0-6 denote stability; 7-12 intermediate instability and 13-18 instability.

    Measured: Day 0 to Day 42 postoperatively

  7. Change in SINS assessment at 84 days compared to baseline

    The SINS is a scoring system based on six parameters; one for pain and five radiographic parameters (location, bone lesion quality, spinal alignment, vertebral body collapse and involvement of posterolateral elements). The SINS ranges 0-18. Score in range 0-6 denote stability; 7-12 intermediate instability and 13-18 instability.

    Measured: Day 0 to Day 84 postoperatively

  8. Change in SINS assessment at 180 days compared to baseline

    The SINS is a scoring system based on six parameters; one for pain and five radiographic parameters (location, bone lesion quality, spinal alignment, vertebral body collapse and involvement of posterolateral elements). The SINS ranges 0-18. Score in range 0-6 denote stability; 7-12 intermediate instability and 13-18 instability.

    Measured: Day 0 to Day 180 postoperatively

  9. Change in Short Form 12v2 (SF-12v2) score compared to baseline

    The 12-Item Short Form Survey version 2 (SF-12v2) is a shortened version of the SF-36v2 designed to reduce respondent burden while achieving minimum standards of precision for purposes of group comparisons involving multiple health dimensions. The SF-12v2 is given at baseline and at 180 days postoperatively.

    Measured: Day 0 to Day 180 postoperatively

  10. Change in Back-specific Numeric Rating Scale for Pain (Back NRS) at 21 days compared to baseline

    The Numeric Rating Scale (NRS) is a psychometric response scale which is commonly used in questionnaires and studies to measure the intensity of pain. In this study we will use a 11-point (0-10) scale where "0" denotes no pain and "10" is the worst imaginable pain.

    Measured: Day 0 to Day 21 postoperatively

  11. Change in Back-specific Numeric Rating Scale for Pain (Back NRS) at 42 days compared to baseline

    The Numeric Rating Scale (NRS) is a psychometric response scale which is commonly used in questionnaires and studies to measure the intensity of pain. In this study we will use a 11-point (0-10) scale where "0" denotes no pain and "10" is the worst imaginable pain.

    Measured: Day 0 to Day 42 postoperatively

  12. Change in Back-specific Numeric Rating Scale for Pain (Back NRS) at 84 days compared to baseline

    The Numeric Rating Scale (NRS) is a psychometric response scale which is commonly used in questionnaires and studies to measure the intensity of pain. In this study we will use a 11-point (0-10) scale where "0" denotes no pain and "10" is the worst imaginable pain.

    Measured: Day 0 to Day 84 postoperatively

  13. Change in Back-specific Numeric Rating Scale for Pain (Back NRS) at 180 days compared to baseline

    The Numeric Rating Scale (NRS) is a psychometric response scale which is commonly used in questionnaires and studies to measure the intensity of pain. In this study we will use a 11-point (0-10) scale where "0" denotes no pain and "10" is the worst imaginable pain.

    Measured: Day 0 to Day 180 postoperatively

  14. Change in vertebral body defect size measured by CT at 42 days compared to baseline

    Vertebral body defect size measured by CT

    Measured: Day 0 to Day 42 postoperatively

  15. Change in vertebral body defect size measured by planar radiographs at 42 days compared to baseline

    Vertebral body defect size and planar radiographs

    Measured: Day 0 to Day 42 postoperatively

  16. Change in vertebral body defect size measured by CT at 180 days compared to baseline

    Vertebral body defect size measured by CT

    Measured: Day 0 to Day 180 postoperatively

  17. Change in vertebral body defect size measured by planar radiographs at 180 days compared to baseline

    Vertebral body defect size measured by planar radiographs

    Measured: Day 0 to Day 180 postoperatively

  18. Duration of use of postoperative prescription opioid

    The average per group duration of intake of opioids in the post-operative setting.

    Measured: Day 180 postoperatively

  19. Daily dose of postoperative prescription opioid use

    The average per group dosage of opioids in the post-operative setting.

    Measured: Day 180 postoperatively

  20. Naloxone concentrations in blood collected from patients at 30 minutes following the vertebroplasty procedure

    Two blood samples (5 mL each) of whole blood are collected at 30 minutes following the placement of the surgical bandage (n=2 blood collections of a total of 10 mL per patient). When naloxone blood concentrations remain below 1.016-ng/mL, there is not a reduction in opioid analgesia

    Measured: 30 minutes following the placement of the surgical bandage

  21. Naloxone concentrations in blood collected from patients at 60 minutes after the vertebroplasty procedure

    Two blood samples (5 mL each) will be collected at 60 minutes following the placement of the surgical bandage (n=2 blood collections of a total of 10 mL per patient). When naloxone blood concentrations remain below 1.016-ng/mL, there is not a reduction in opioid analgesia

    Measured: 60 minutes following the placement of the surgical bandage

Timeline

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

  1. First posted15 Mar 2022
  2. Study start1 Sep 2022
  3. Primary completion10 Oct 2025
  4. Study completion10 Oct 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
10 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05280067
Sponsor's protocol ID
ZG-2021-002
Acronym
ZGMBC
Status last verified
Jan 2026
First submitted
28 Jan 2022
Last updated
16 Jan 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing ZetaMet™ (ZetaFuse™ Bone Graft) in people with Metastatic Breast Cancer in the Spine, run by Zetagen Therapeutics, Inc at 2 sites in Canada.

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 9 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: finished, as of the sponsor's last update on 16 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in Canada. 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?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

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?

Number of Skeletal Related Events (SREs) (time frame: Day 0 up to Day 180). The study lists 21 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 16 Jan 2026.

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