Breast CancerBREAST-TP53NCT04966923
Phenotype and Prognosis of Patients With Breast Cancer and Pathogenic Variants of TP53
An observational study of Breast Cancer and TP53 R337H, run by Instituto do Cancer do Estado de São Paulo at 1 site in Brazil.
Trial summary
A prospective and retrospective cohort study of patients with a documented pathogenic or likely pathogenic variants of TP53 were identified using blood DNA colection and breast cancer diagnosis by histological confirmation, between 1999 and 2022. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Breast Cancer, TP53 R337H, Li-Fraumeni Syndrome
- How many people
- 135 participants
- Where
- 1 siteBrazil
- Study dates
- 2 Dec 2018to 22 Feb 2022
- 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 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: A prospective and retrospective cohort study of patients with a documented pathogenic or likely pathogenic variants of TP53 were identified using blood DNA colection and breast cancer diagnosis by histological confirmation, between 1999 and 2022. All patients were followed by the Hereditary Group of a single cancer center (Instituto do Cancer do Estado de Sao Paulo). Patients were included if they had a histopathological diagnosis of localized invasive carcinoma or in situ carcinoma of the breast. All patients met Revised Chompret criteria or Li Fraumeni like syndrome or family member of carrier TP53 or hereditary breast and ovarian Syndrome. Patients with only other types of breast cancer such as sarcoma and phyllodes tumor were excluded from the analysis.
Who may be able to join
- Breast cancer (histopathological diagnosis of localized invasive carcinoma or in situ carcinoma of the breast) and documented germline pathogenic variants of TP53.
Who cannot join
- Patients with only other types of breast cancer such as sarcoma and phyllodes tumor were excluded from the analysis.
- Metastatic Breast Cancer at diagnosis ("denovo")
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Phenotype and Prognosis of Patients With Breast Cancer and Pathogenic Variants of TP53 (BREAST TP53)
A prospective and retrospective cohort study of patients with a documented pathogenic or likely pathogenic variants of TP53 were identified using blood DNA colection and breast cancer diagnosis by histological confirmation, between 1999 and 2022. All patients were followed by the Hereditary Group of a single cancer center (Instituto do Cancer do Estado de Sao Paulo). Patients were included if they had a histopathological diagnosis of localized invasive carcinoma or in situ carcinoma of the breast and with localized disease. Patients met Revised Chompret criteria, Li Fraumeni like syndrome,family member of carrier TP53 or hereditary breast and ovarian syndrome for germline test.
Read the detailed description
The primary outcome was progression free survival from specific breast cancer from patients with BC and TP53 mutation versus BC and no pathogenic variants documented in genetic test. We proposed 45 cases TP53 pathogenic carriers and localized breast cancer diagnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control with no documented pathogenic variants in genetic test. With a sample of 135 patients with distribution 2:1, considering a two-tailed alpha of 5%, the study will have 80% power to identify a hazard hatio of 0.62 in the comparison of progression-free survival between the groups.
Descriptive statistics will be used to summarize clinical characteristics and treatments performed. Continuous variables may be compared between groups using T Student test or Mann-Whitney test, in the case of normal and non-normal data distribution, respectively. Categorical variables may be compared between groups using the Fisher exact test.
Progression-free survival will be estimated from the date of breast cancer diagnosis until the date of progression or date of recurrence (in cases of localized disease treated) of breast cancer. Death will not be considered as an event for progression-free survival, since patients with PV TP53 may have an increased risk of deaths from other neoplasms. The breast cancer specific survival will be estimated from the date of diagnosis of breast cancer until the date of death from the breast cancer. Patients without the specific events will be censored on the date of last follow-up.
The Kaplan-Meyer method will be used for survival estimates, comparing survival curves with log-rank testing. The Cox regression model will be used for hazard-ratio calculation and 95% confidence-interval. P value less than 0.05 will be considered statistically significant. Statistical analyses will be performed through Stata program, version 15.1 (StataCorp, Texas, USA).
- Being tested
- No intervention in this study
- Keywords
- Breast Cancer, TP53
- Medical subject headings
- Breast Neoplasms, Li-Fraumeni Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
No intervention in this studyOther
Analyses of pathogenic variant TP53 and variants in genetic test
| Study group | Role | What they receive |
|---|---|---|
| Breast Cancer and documented pathogenic variant TP53 | Documented pathogenic or likely pathogenic variants of TP53 were identified using blood DNA colection and localized breast cancer diagnosis by histological confirmation. All patients met Revised Chompret criteria or Li Fraumeni like syndrome or family member of carrier TP53 Receives: Other: No intervention in this study | |
| Breast Cancer and no documented pathogenic variants in genetic test | Control group with localized breast cancer and no pathogenic variants documented in a genetic test Receives: Other: No intervention in this study |
What is being measured
The primary outcome is the main question the study is designed to answer.
Progression free survival
progression free survival from specific breast cancer from patients with BC and TP53. mutation versus BC and no pathogenic variants documented in genetic test. gnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control are estimated with the same age (range 10 years), staging and immunohistochemistry
Measured: We proposed 45 cases TP53 pathogenic carriers and breast cancer diagnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control are estimated with the same age (range 10 years)
Secondary outcomes (1)
Overall Survival, causes of deaths, local breast cancer recurrence and contra-lateral breast cancer recurrence
Measured: This study will enrollment 45 cases TP53 pathogenic carriers and breast cancer diagnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control are estimated with the same age (range 10 years)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 Jul 2021
- Study start2 Dec 2018
- Primary completion7 Aug 2021
- Study completion22 Feb 2022
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Breast CancerStudies 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
- Case-control
- Time perspective
- Other
- Enrolment
- 135 participants (actual)
Sponsor and investigators
- Lead sponsor
- Instituto do Cancer do Estado de São Paulo
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Vanessa Petry, MD, Principal investigator, Instituto do Cancer do Estado de São Paulo
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04966923
- Sponsor's protocol ID
- 3.0840453
- Acronym
- BREAST-TP53
- Status last verified
- Aug 2022
- First submitted
- 8 Jul 2021
- Last updated
- 9 Aug 2022
- 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 9 Aug 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Phenotype and Prognosis of Patients With Breast Cancer and Pathogenic Variants of TP53 (BREAST TP53)
- ClinicalTrials.gov ID
- NCT04966923
- Acronym / sponsor ID
- BREAST-TP53 / 3.0840453
- Keywords
- Breast Cancer, TP53
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 135 participants (actual)
- Lead sponsor
- Instituto do Cancer do Estado de São PauloUniversity, hospital or other
- Study start
- 2 Dec 2018 (actual)
- Primary completion
- 7 Aug 2021 (actual)
- Study completion
- 22 Feb 2022 (actual)
- First posted
- 19 Jul 2021 (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.
A prospective and retrospective cohort study of patients with a documented pathogenic or likely pathogenic variants of TP53 were identified using blood DNA colection and breast cancer diagnosis by histological confirmation, between 1999 and 2022. All patients were followed by the Hereditary Group of a single cancer center (Instituto do Cancer do Estado de Sao Paulo). Patients were included if they had a histopathological diagnosis of localized invasive carcinoma or in situ carcinoma of the breast and with localized disease. Patients met Revised Chompret criteria, Li Fraumeni like syndrome,family member of carrier TP53 or hereditary breast and ovarian syndrome for germline test.
Detailed description
The primary outcome was progression free survival from specific breast cancer from patients with BC and TP53 mutation versus BC and no pathogenic variants documented in genetic test. We proposed 45 cases TP53 pathogenic carriers and localized breast cancer diagnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control with no documented pathogenic variants in genetic test. With a sample of 135 patients with distribution 2:1, considering a two-tailed alpha of 5%, the study will have 80% power to identify a hazard hatio of 0.62 in the comparison of progression-free survival between the groups.
Descriptive statistics will be used to summarize clinical characteristics and treatments performed. Continuous variables may be compared between groups using T Student test or Mann-Whitney test, in the case of normal and non-normal data distribution, respectively. Categorical variables may be compared between groups using the Fisher exact test.
Progression-free survival will be estimated from the date of breast cancer diagnosis until the date of progression or date of recurrence (in cases of localized disease treated) of breast cancer. Death will not be considered as an event for progression-free survival, since patients with PV TP53 may have an increased risk of deaths from other neoplasms. The breast cancer specific survival will be estimated from the date of diagnosis of breast cancer until the date of death from the breast cancer. Patients without the specific events will be censored on the date of last follow-up.
The Kaplan-Meyer method will be used for survival estimates, comparing survival curves with log-rank testing. The Cox regression model will be used for hazard-ratio calculation and 95% confidence-interval. P value less than 0.05 will be considered statistically significant. Statistical analyses will be performed through Stata program, version 15.1 (StataCorp, Texas, USA).
Study design
- Observational model
- Case-control
- Time perspective
- Other
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Breast Cancer and documented pathogenic variant TP53 | – | Other: No intervention in this studyDocumented pathogenic or likely pathogenic variants of TP53 were identified using blood DNA colection and localized breast cancer diagnosis by histological confirmation. All patients met Revised Chompret criteria or Li Fraumeni like syndrome or family member of carrier TP53 |
| Breast Cancer and no documented pathogenic variants in genetic test | – | Other: No intervention in this studyControl group with localized breast cancer and no pathogenic variants documented in a genetic test |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- A prospective and retrospective cohort study of patients with a documented pathogenic or likely pathogenic variants of TP53 were identified using blood DNA colection and breast cancer diagnosis by histological confirmation, between 1999 and 2022. All patients were followed by the Hereditary Group of a single cancer center (Instituto do Cancer do Estado de Sao Paulo). Patients were included if they had a histopathological diagnosis of localized invasive carcinoma or in situ carcinoma of the breast. All patients met Revised Chompret criteria or Li Fraumeni like syndrome or family member of carrier TP53 or hereditary breast and ovarian Syndrome. Patients with only other types of breast cancer such as sarcoma and phyllodes tumor were excluded from the analysis.
Key inclusion criteria (1 listed)
- Breast cancer (histopathological diagnosis of localized invasive carcinoma or in situ carcinoma of the breast) and documented germline pathogenic variants of TP53.
Key exclusion criteria (2 listed)
- Patients with only other types of breast cancer such as sarcoma and phyllodes tumor were excluded from the analysis.
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 |
|---|---|---|
| No intervention in this studyAnalyses of pathogenic variant TP53 and variants in genetic test | Other | Breast Cancer and documented pathogenic variant TP53, Breast Cancer and no documented pathogenic variants in genetic test |
Primary outcome
Progression free survival
Time frame: We proposed 45 cases TP53 pathogenic carriers and breast cancer diagnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control are estimated with the same age (range 10 years)
progression free survival from specific breast cancer from patients with BC and TP53. mutation versus BC and no pathogenic variants documented in genetic test. gnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control are estimated with the same age (range 10 years), staging and immunohistochemistry
1 secondary outcome
Overall Survival, causes of deaths, local breast cancer recurrence and contra-lateral breast cancer recurrence
Time frame: This study will enrollment 45 cases TP53 pathogenic carriers and breast cancer diagnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control are estimated with the same age (range 10 years)
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 9 Aug 2022.
Related trials for Breast Cancer
Active, not recruiting
Streamlined Geriatric and Oncological Evaluation Based On IC Technology
Breast Cancer, Comorbidities and Coexisting Conditions
RecruitingPhase 2
Gene Signatures to Guide HR+MBC Therapy in a Diverse Cohort
Invasive Mammary Carcinoma, Metastatic Breast Cancer
Not yet recruitingObservational study
Comparison of Reliability, Time Cost, and Participant Comfort of Lymphedema Assessments in Upper Extremity
Lymphedema, Upper Extremity Lymphedema
RecruitingPhase 3
A Study of Camrelizumab Plus Chemotherapy in Combination With or Without Famitinib as Neoadjuvant Therapy in Participants With Triple Negative Breast Cancer (BCTOP-T-N01)
TNBC - Triple-Negative Breast Cancer
RecruitingPhase 3
Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed by Hormone Therapy With Ribociclib for the Treatment of High Anatomic Stage Breast Cancer With Low Recurrence Risk, The RxFINE-Low Trial
Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8
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.
Vanessa Petry, MD principal investigator
Instituto do Cancer do Estado de São Paulo
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 and TP53 R337H, run by Instituto do Cancer do Estado de São Paulo at 1 site in Brazil.
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 1 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 9 Aug 2022. 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 Brazil. 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?
Progression free survival (time frame: We proposed 45 cases TP53 pathogenic carriers and breast cancer diagnosed for each case included we will be selected 2 controls resulting in 90 control patients, for control are estimated with the same age (range 10 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 9 Aug 2022.