Breast Cancer FemaleNCT05376644
Molecular Imaging of HER2 Expression in HER2-positive Breast Cancer Using 99mTc-ADAPT6 vs 99mTc-DARPinG3
A study testing 99mTc-ADAPT6 and 99mTc-DARPinG3 in people with Breast Cancer Female, run by Tomsk National Research Medical Center of the Russian Academy of Sciences at 1 site in Russia.
Trial summary
An open-label, single center study with 99mTc-ADAPT6 and 99mTc-DARPinG3 SPECT and biopsies of primary tumour in HER2-positive Breast Cancer before system (chemo/targeted) therapy, where the primary endpoint of the study is to compare imaging properties of 99mTc-ADAPT6 and 99mTc-DARPin G3 SPECT in HER2-positive breast… Read more about this study
- Who is it for?
- Ages 18 to 80 years, women only
- Conditions the study is for
- Breast Cancer Female
- What is being tested?
- 99mTc-ADAPT6 and 99mTc-DARPinG3
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 15 participants
- Where
- 1 siteRussia
- Study dates
- 1 May 2022to 21 Jan 2023
- Phase
- Interventional
- 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 18 to 80 years
- Women only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Subject is > 18 years of age;
- Diagnosis of primary breast cancer with possible lymph node metastases before system (chemo+targeted therapy);
- Availability of results from HER2 status previously determined on material from the primary tumor: HER2-positive, defined as a DAKO HercepTest™ score of 3+ or FISH positive;
- Sequential injection of 99mTc-ADAPT6 and 99mTc-DARPinG3 in the interval of 3-4 days in each HER2-positive breast cancer patient;
- Hematological, liver and renal function test results within the following limits:
- White blood cell count: > 2.0 x 109/L
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- Hemoglobin: > 80 g/L
- Platelets: > 50.0 x 109/L
- ALT, ALP, AST: =< 5.0 times Upper Limit of Normal
- Bilirubin =< 2.0 times Upper Limit of Normal
- Serum creatinine: Within Normal Limits
- A negative pregnancy test for all patients of childbearing potential. Sexually active women of childbearing potential participating in the study must use a medically acceptable form of contraception for at least 30 days after study termination;
- Subject is capable to undergo the diagnostic investigations to be performed in the study;
- Informed consent
Who cannot join
- 1. Second, non-breast malignancy 2. Active current autoimmune disease or history of autoimmune disease 3. Active infection or history of severe infection within the previous 3 months (if clinically relevant at screening) 4. Known HIV positive or chronically active hepatitis B or C 5. Administration of other investigational medicinal product within 30 days of screening 6. Ongoing toxicity > grade 2 from previous standard or investigational therapies, according to US National Cancer Institute's
- -
Trial locations and contacts
1 site in 1 country.
About this study
Official title: SPECT Imaging of Human Epidermal Growth Factor Receptor 2 (HER2) Using 99mTc-ADAPT6 and 99mTc-DARPinG3 in HER2-positive Breast Cancer Patients Before System (Chemo/Targeted) Therapy.
An open-label, single center study with 99mTc-ADAPT6 and 99mTc-DARPinG3 SPECT and biopsies of primary tumour in HER2-positive Breast Cancer before system (chemo/targeted) therapy, where the primary endpoint of the study is to compare imaging properties of 99mTc-ADAPT6 and 99mTc-DARPin G3 SPECT in HER2-positive breast cancer patients.
Read the detailed description
The primary objectives are:
Compare SPECT/CT imaging properties of 99mTc-ADAPT6 and 99mTc-DARPin G3 in HER2-positive primary tumour of breast cancer patients before system (chemo/targeted) therapy.
The secondary objectives are:
To compare the SPECT/CT tumor imaging data with the data concerning HER2 expression obtained by immunohistochemistry (IHC) and/or fluorescent in situ hybridization (FISH) analysis of biopsy samples.
- Conditions
- Breast Cancer Female
- Being tested
- 99mTc-ADAPT6, 99mTc-DARPinG3
- Keywords
- 99mTc-ADAPT6, 99mTc-DARPinG3, Breast Cancer, HER2 expression
- Medical subject headings
- Breast Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
99mTc-ADAPT6Drug
Also called SPECT
One single injection of 99mTc-ADAPT6, followed by gamma camera imaging 2 hours after injection.
99mTc-DARPinG3Drug
Also called SPECT
One single injection of 99mTc-DARPinG3, followed by gamma camera imaging 4 hours after injection.
| Study group | Role | What they receive |
|---|---|---|
| HER2 positive breast cancer patients | Experimental | Maximum (15) evaluable subjects with HER2-positive status in primary tumour before chemo/targeted therapy have to be enrolled in the study. Subjects withdrawn from the study for any reason will be replaced Receives: Drug: 99mTc-ADAPT6; Drug: 99mTc-DARPinG3 |
What is being measured
The primary outcome is the main question the study is designed to answer.
99mTc-ADAPT6 uptake (counts)/SUV
SPECT/CT-based 99mTc-ADAPT6 uptake value in primary tumor lesions (counts)/SUV of 99mTc-ADAPT6 focal uptake coinciding with tumor lesions will be assessed using SPECT/CT at 2 hours after injection and measured in counts and SUV.
Measured: 2 hours
99mTc-ADAPT6 tumor-to-background ratio (SPECT)
The SPECT-based tumor-to-background ratio will be calculated as follows: the value of 99mTc-ADAPT6 uptake coinciding with tumor lesions (counts/SUV) will be divided by the value of 99mTc-ADAPT6 uptake coinciding with the regions without pathological findings (counts)
Measured: 2 hours
99mTc-DARPinG3 uptake (counts)/SUV
SPECT/CT-based 99mTc-DARPinG3 uptake value in primary tumor lesions (counts)/SUV of 99mTc-DARPinG3 focal uptake coinciding with tumor lesions will be assessed using SPECT/CT at 4 hours after injection and measured in counts and SUV
Measured: 4 hours
99mTc-DARPinG3 tumor-to-background ratio (SPECT)
The SPECT-based tumor-to-background ratio will be calculated as follows: the value of 99mTc-DARPinG3 uptake coinciding with tumor lesions (counts) will be divided by the value of 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/the value of 99mTc-ADAPT6 and 99mTc-DARPinG3 uptake coinciding with tumor lesions (counts) will be divided by the value of 99mTc-ADAPT6 and 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
Measured: 4 hours
99mTc-ADAPT6 vs 99mTc-DARPinG3 uptake (counts)/SUV
Comparison of SPECT/CT-based 99mTc-ADAPT6 versus 99mTc-DARPinG3 uptake value in primary tumor lesions (counts)/SUV of 99mTc-ADAPT6 and 99mTc-DARPinG3 focal uptake coinciding with tumor lesions will be assessed using SPECT/CT at 2 and 4 hours after injection and measured in counts and SUV.
Measured: 2 and 4 hours
99mTc-ADAPT6 vs 99mTc-DARPinG3 tumor-to-background ratio (SPECT)
Comparison of the value of 99mTc-ADAPT6 versus 99mTc-DARPinG3 uptake coinciding with tumor lesions (counts/SUV) divided by the value of 99mTc-ADAPT6 and 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
Measured: 2 and 4 hours
Secondary outcomes (2)
99mTc-ADAPT6 vs immunohistochemical studies (percent)
Sensitivity (%) of the method is assessed by comparing the 99mTc-ADAPT6 accumulation in the primary tumor with the results of immunohistochemical studies
Measured: 2 hours
99mTc-DARPinG3 vs immunohistochemical studies (percent)
Sensitivity (%) of the method is assessed by comparing the 99mTc-DARPinG3 accumulation in the primary tumor with the results of immunohistochemical studies
Measured: 4 hours
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 May 2022
- Study start1 May 2022
- Primary completion31 Dec 2022
- Study completion21 Jan 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Breast Cancer FemaleStudies of the same condition, open and under way.
- 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 N/A
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- Diagnostic Test: ADAPT6-SPECT and DARPinG3-SPECT Diagnostic SPECT for HER2-positive Breast Cancer primary tumour
- Masking
- None (open label)
- Enrolment
- 15 participants (actual)
Sponsor and investigators
- Lead sponsor
- Tomsk National Research Medical Center of the Russian Academy of Sciences
- Sponsor type
- University, hospital or other
- Collaborators
- Uppsala University
- Responsible party
- Sponsor
- Investigators
- Olga Bragina, MD, Dsc, Principal investigator, Tomsk NRMC
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05376644
- Sponsor's protocol ID
- ORI-04/03/2022-1
- Status last verified
- Apr 2023
- First submitted
- 12 May 2022
- Last updated
- 29 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- SPECT Imaging of Human Epidermal Growth Factor Receptor 2 (HER2) Using 99mTc-ADAPT6 and 99mTc-DARPinG3 in HER2-positive Breast Cancer Patients Before System (Chemo/Targeted) Therapy.
- ClinicalTrials.gov ID
- NCT05376644
- Acronym / sponsor ID
- ORI-04/03/2022-1
- Conditions
- Breast Cancer Female
- Keywords
- 99mTc-ADAPT6, 99mTc-DARPinG3, Breast Cancer, HER2 expression
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 15 participants (actual)
- Lead sponsor
- Tomsk National Research Medical Center of the Russian Academy of SciencesUniversity, hospital or other
- Collaborators
- Uppsala University
- Study start
- 1 May 2022 (actual)
- Primary completion
- 31 Dec 2022 (actual)
- Study completion
- 21 Jan 2023 (actual)
- First posted
- 17 May 2022 (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.
An open-label, single center study with 99mTc-ADAPT6 and 99mTc-DARPinG3 SPECT and biopsies of primary tumour in HER2-positive Breast Cancer before system (chemo/targeted) therapy, where the primary endpoint of the study is to compare imaging properties of 99mTc-ADAPT6 and 99mTc-DARPin G3 SPECT in HER2-positive breast cancer patients.
Detailed description
The primary objectives are:
Compare SPECT/CT imaging properties of 99mTc-ADAPT6 and 99mTc-DARPin G3 in HER2-positive primary tumour of breast cancer patients before system (chemo/targeted) therapy.
The secondary objectives are:
To compare the SPECT/CT tumor imaging data with the data concerning HER2 expression obtained by immunohistochemistry (IHC) and/or fluorescent in situ hybridization (FISH) analysis of biopsy samples.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- Diagnostic Test: ADAPT6-SPECT and DARPinG3-SPECT Diagnostic SPECT for HER2-positive Breast Cancer primary tumour
| Arm | Type | Receives |
|---|---|---|
| HER2 positive breast cancer patients | Experimental | Drug: 99mTc-ADAPT6, Drug: 99mTc-DARPinG3Maximum (15) evaluable subjects with HER2-positive status in primary tumour before chemo/targeted therapy have to be enrolled in the study. Subjects withdrawn from the study for any reason will be replaced |
Who may qualify
- Ages
- 18 to 80 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (14 listed)
- Subject is > 18 years of age;
- Diagnosis of primary breast cancer with possible lymph node metastases before system (chemo+targeted therapy);
- Availability of results from HER2 status previously determined on material from the primary tumor: HER2-positive, defined as a DAKO HercepTest™ score of 3+ or FISH positive;
- Sequential injection of 99mTc-ADAPT6 and 99mTc-DARPinG3 in the interval of 3-4 days in each HER2-positive breast cancer patient;
- Hematological, liver and renal function test results within the following limits:
Key exclusion criteria (2 listed)
- 1. Second, non-breast malignancy 2. Active current autoimmune disease or history of autoimmune disease 3. Active infection or history of severe infection within the previous 3 months (if clinically relevant at screening) 4. Known HIV positive or chronically active hepatitis B or C 5. Administration of other investigational medicinal product within 30 days of screening 6. Ongoing toxicity > grade 2 from previous standard or investigational therapies, according to US National Cancer Institute's
- -
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 |
|---|---|---|
| 99mTc-ADAPT6Also: SPECTOne single injection of 99mTc-ADAPT6, followed by gamma camera imaging 2 hours after injection. | Drug | HER2 positive breast cancer patients |
| 99mTc-DARPinG3Also: SPECTOne single injection of 99mTc-DARPinG3, followed by gamma camera imaging 4 hours after injection. | Drug | HER2 positive breast cancer patients |
Primary outcome
99mTc-ADAPT6 uptake (counts)/SUV
Time frame: 2 hours
SPECT/CT-based 99mTc-ADAPT6 uptake value in primary tumor lesions (counts)/SUV of 99mTc-ADAPT6 focal uptake coinciding with tumor lesions will be assessed using SPECT/CT at 2 hours after injection and measured in counts and SUV.
99mTc-ADAPT6 tumor-to-background ratio (SPECT)
Time frame: 2 hours
The SPECT-based tumor-to-background ratio will be calculated as follows: the value of 99mTc-ADAPT6 uptake coinciding with tumor lesions (counts/SUV) will be divided by the value of 99mTc-ADAPT6 uptake coinciding with the regions without pathological findings (counts)
99mTc-DARPinG3 uptake (counts)/SUV
Time frame: 4 hours
SPECT/CT-based 99mTc-DARPinG3 uptake value in primary tumor lesions (counts)/SUV of 99mTc-DARPinG3 focal uptake coinciding with tumor lesions will be assessed using SPECT/CT at 4 hours after injection and measured in counts and SUV
99mTc-DARPinG3 tumor-to-background ratio (SPECT)
Time frame: 4 hours
The SPECT-based tumor-to-background ratio will be calculated as follows: the value of 99mTc-DARPinG3 uptake coinciding with tumor lesions (counts) will be divided by the value of 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/the value of 99mTc-ADAPT6 and 99mTc-DARPinG3 uptake coinciding with tumor lesions (counts) will be divided by the value of 99mTc-ADAPT6 and 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
99mTc-ADAPT6 vs 99mTc-DARPinG3 uptake (counts)/SUV
Time frame: 2 and 4 hours
Comparison of SPECT/CT-based 99mTc-ADAPT6 versus 99mTc-DARPinG3 uptake value in primary tumor lesions (counts)/SUV of 99mTc-ADAPT6 and 99mTc-DARPinG3 focal uptake coinciding with tumor lesions will be assessed using SPECT/CT at 2 and 4 hours after injection and measured in counts and SUV.
99mTc-ADAPT6 vs 99mTc-DARPinG3 tumor-to-background ratio (SPECT)
Time frame: 2 and 4 hours
Comparison of the value of 99mTc-ADAPT6 versus 99mTc-DARPinG3 uptake coinciding with tumor lesions (counts/SUV) divided by the value of 99mTc-ADAPT6 and 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
2 secondary outcomes
99mTc-ADAPT6 vs immunohistochemical studies (percent)
Time frame: 2 hours
99mTc-DARPinG3 vs immunohistochemical studies (percent)
Time frame: 4 hours
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Jun 2026.
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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. This study is not recruiting at the moment.
Olga Bragina, MD, Dsc principal investigator
Tomsk NRMC
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing 99mTc-ADAPT6 and 99mTc-DARPinG3 in people with Breast Cancer Female, run by Tomsk National Research Medical Center of the Russian Academy of Sciences at 1 site in Russia.
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 14 inclusion and 2 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 Russia. 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.
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?
99mTc-ADAPT6 uptake (counts)/SUV (time frame: 2 hours). The study lists 6 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 29 Jun 2026; AzTrials last refreshed its copy on 7 Nov 2026.