Breast Cancer FemaleNCT05695859
99mTc-DARPinG3 SPECT/CT for Non-invasive HER2-AX in Breast Cancer With Metastatic Lymph Nodes Before Targeted Therapy
An observational study of 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-DARPinG3 SPECT/CT and biopsies of primary tumour and metastatic lymph nodes in breast cancer patients, where the primary endpoint of the study is to find out the correlation between the HER2 expression measured by 99mTc-DARPinG3 SPECT/CT and standard histopathology from… 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-DARPinG3 SPECT/CT
- Type of treatment
- Injection or infusion
- How many people
- 24 participants
- Where
- 1 siteRussia
- Study dates
- 20 Dec 2022to 1 Dec 2023
- Phase
- Observational
- 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
Study population: Breast cancer female patients
Who may be able to join
- Subject is > 18 years of age
- Diagnosis of primary breast cancer with lymph node metastases
- Availability of results from HER2 status previously determined on material from the primary tumor and metastatic LN, either a. HER2-positive, defined as a DAKO HercepTest™ score of 3+ or FISH positive or b. HER2-negative, defined as a DAKO HercepTest™ score of 0 or 1+; or else if 2+ then FISH negative
- Hematological, liver and renal function test results within the following limits: White blood cell count: > 2.0 x 109/L; 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
- Any system therapy (chemo-/targeted therapy)
- Second, non-breast malignancy
- Active current autoimmune disease or history of autoimmune disease
- 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
- Administration of other investigational medicinal product within 30 days of screening
- 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/CT Imaging of Human Epidermal Growth Factor Receptor 2 (HER2) Expression in Primary Tumour and Metastatic Axillary Lymph Nodes Using Technetium-99m-labelled DARPinG3 Molecule-based.
An open-label, single center study with 99mTc-DARPinG3 SPECT/CT and biopsies of primary tumour and metastatic lymph nodes in breast cancer patients, where the primary endpoint of the study is to find out the correlation between the HER2 expression measured by 99mTc-DARPinG3 SPECT/CT and standard histopathology from relevant tumor and lymph node biopsies.
Read the detailed description
Overall goal of the project: To determine HER2 expression level in primary breast cancer and axillary lymph node metastases before chemo/targeted therapy.
- Conditions
- Breast Cancer Female
- Being tested
- 99mTc-DARPinG3 SPECT/CT
- Keywords
- 99mTc-DARPinG3, breast cancer, metastatic lymph nodes, HER2
- 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-DARPinG3 SPECT/CTDrug
Also called SPECT/CT
One single injection of 99mTc-DARPinG3, followed by gamma camera imaging 4 hours after injection
What is being measured
The primary outcome is the main question the study is designed to answer.
SPECT/CT-based 99mTc-DARPinG3 uptake in tumor lesions
SPECT/CT-based 99mTc-DARPinG3 uptake value in tumor lesions (counts)/SUV of 99mTc-DARPinG3 focal uptake coinciding with tumor lesions is assessed using SPECT/CT at 4 hours after injection and measured in counts and SUV
Measured: 4 hours
SPECT/CT-based 99mTc-DARPinG3 uptake value in metastatic lymph nodes
SPECT/CT-based 99mTc-DARPinG3 uptake value in metastatic lymph nodes (counts)/SUV of 99mTc-DARPinG3 focal uptake coinciding with tumor lesions is assessed using SPECT/CT at 4 hours after injection and measured in counts and SUV
Measured: 4 hours
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/SUV) will be divided by the value of 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
Measured: 4 hours
LN-to-background LN ratio (SPECT)
The SPECT-based LN-to-background LN ratio will be calculated as follows: the value of 99mTc-DARPinG3 uptake coinciding with LN lesions (counts/SUV) will be divided by the value of 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
Measured: 4 hours
Secondary outcomes (1)
Morphological and immunohistochemical verification of 99mTc-DARPinG3 accumulation
Comparison of the 99mTc-DARPinG3 accumulation in the primary tumor and metastatic lymph nodes with the results of morphological and 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 posted25 Jan 2023
- Study start20 Dec 2022
- Primary completion1 Dec 2023
- Study completion1 Dec 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
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 24 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
- Vladimir Chernov, MD, Principal investigator, Tomsk NRMC
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05695859
- Sponsor's protocol ID
- ORI-15/12/2022-1
- Status last verified
- Jun 2026
- First submitted
- 13 Jan 2023
- Last updated
- 24 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 24 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- SPECT/CT Imaging of Human Epidermal Growth Factor Receptor 2 (HER2) Expression in Primary Tumour and Metastatic Axillary Lymph Nodes Using Technetium-99m-labelled DARPinG3 Molecule-based.
- ClinicalTrials.gov ID
- NCT05695859
- Acronym / sponsor ID
- ORI-15/12/2022-1
- Conditions
- Breast Cancer Female
- Keywords
- 99mTc-DARPinG3, breast cancer, metastatic lymph nodes, HER2
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 24 participants (actual)
- Lead sponsor
- Tomsk National Research Medical Center of the Russian Academy of SciencesUniversity, hospital or other
- Collaborators
- Uppsala University
- Study start
- 20 Dec 2022 (actual)
- Primary completion
- 1 Dec 2023 (actual)
- Study completion
- 1 Dec 2023 (actual)
- First posted
- 25 Jan 2023 (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-DARPinG3 SPECT/CT and biopsies of primary tumour and metastatic lymph nodes in breast cancer patients, where the primary endpoint of the study is to find out the correlation between the HER2 expression measured by 99mTc-DARPinG3 SPECT/CT and standard histopathology from relevant tumor and lymph node biopsies.
Detailed description
Overall goal of the project: To determine HER2 expression level in primary breast cancer and axillary lymph node metastases before chemo/targeted therapy.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 to 80 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Breast cancer female patients
Key inclusion criteria (7 listed)
- Subject is > 18 years of age
- Diagnosis of primary breast cancer with lymph node metastases
- Availability of results from HER2 status previously determined on material from the primary tumor and metastatic LN, either a. HER2-positive, defined as a DAKO HercepTest™ score of 3+ or FISH positive or b. HER2-negative, defined as a DAKO HercepTest™ score of 0 or 1+; or else if 2+ then FISH negative
- Hematological, liver and renal function test results within the following limits: White blood cell count: > 2.0 x 109/L; 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
Key exclusion criteria (6 listed)
- Any system therapy (chemo-/targeted therapy)
- Second, non-breast malignancy
- Active current autoimmune disease or history of autoimmune disease
- 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
- Administration of other investigational medicinal product within 30 days of screening
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-DARPinG3 SPECT/CTAlso: SPECT/CTOne single injection of 99mTc-DARPinG3, followed by gamma camera imaging 4 hours after injection | Drug | – |
Primary outcome
SPECT/CT-based 99mTc-DARPinG3 uptake in tumor lesions
Time frame: 4 hours
SPECT/CT-based 99mTc-DARPinG3 uptake value in tumor lesions (counts)/SUV of 99mTc-DARPinG3 focal uptake coinciding with tumor lesions is assessed using SPECT/CT at 4 hours after injection and measured in counts and SUV
SPECT/CT-based 99mTc-DARPinG3 uptake value in metastatic lymph nodes
Time frame: 4 hours
SPECT/CT-based 99mTc-DARPinG3 uptake value in metastatic lymph nodes (counts)/SUV of 99mTc-DARPinG3 focal uptake coinciding with tumor lesions is assessed using SPECT/CT at 4 hours after injection and measured in counts and SUV
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/SUV) will be divided by the value of 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
LN-to-background LN ratio (SPECT)
Time frame: 4 hours
The SPECT-based LN-to-background LN ratio will be calculated as follows: the value of 99mTc-DARPinG3 uptake coinciding with LN lesions (counts/SUV) will be divided by the value of 99mTc-DARPinG3 uptake coinciding with the regions without pathological findings (counts/SUV)
1 secondary outcome
Morphological and immunohistochemical verification of 99mTc-DARPinG3 accumulation
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 24 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.
Vladimir Chernov, MD 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?
An observational study of 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 7 inclusion and 6 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 24 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?
SPECT/CT-based 99mTc-DARPinG3 uptake in tumor lesions (time frame: 4 hours). The study lists 4 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 24 Jun 2026.