Understanding the genetic causes and clinical aspects of being born with a mutation in the TP53 gene in Sweden
| ISRCTN | ISRCTN13103571 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN13103571 |
- Submission date
- 03/10/2019
- Registration date
- 14/10/2019
- Last edited
- 14/04/2025
- Recruitment status
- Recruiting
- Overall study status
- Ongoing
- Condition category
- Genetic Diseases
Plain English summary of protocol
Background:
Individuals who are born with a mutation in their TP53 gene in all of their cells (germline mutation) have an increased risk of developing cancer. Some individuals have a high risk of breast cancer and it is unclear if these families also have an increased risk of other adult-onset cancer types. Other individuals have a high risk of many cancer types from childhood and young adulthood, mainly cancers of the bone and soft tissues, breast, brain- and/or cancer in the adrenal gland. This combination of cancers in a family is known as Li-Fraumeni syndrome (LFS). Today, we do not understand why some families with TP53 mutations have adult-onset breast cancer while others develop LFS. Recent reports have indicated that mutation carriers may benefit from a surveillance program.
Aims:
This study aims to characterise germline TP53 mutations from all possible perspectives in order to understand the implications of these mutations and to improve the treatment, surveillance and clinical follow-up of patients with germline TP53 mutations.
Who can participate?
All individuals of any age who carry a germline TP53 mutation (detected in e.g. normal blood cells) and who are able to provide informed consent are able to participate. In addition, children who have a parent with a germline TP53 mutation, but who have not undergone genetic testing themselves are able to participate.
What does the study involve?
The study involves four parts. Clinical information on cancer diagnoses, treatment, follow-up, genetic testing results and family history will be collected in a registry for all participants.
In addition, participants can opt to: (1) donate blood/tissue samples for the molecular analyses and for circulating biomarkers for cancer; (2) participate in the surveillance programme with clinical examination and whole-body MRI for adults and ultrasound of the abdomen and urinary sample for children; and (3) fill out three questionnaires that measure quality of life, cancer worry and benefits/risks of surveillance.
What are the possible benefits and risks of participating?
We do not know yet if there is any advantage in participating in the study. If the surveillance program turns out to be beneficial, then the participants will have benefited from this during the study period and we hope will then continue with the same protocol after the study is terminated. On the other hand, if the surveillance program turns out to not be beneficial, then the participants have not benefitted (and perhaps even suffered more anxiety) and also will not be able to continue with the surveillance program after termination of the study. The blood samples entail a small discomfort, but can be taken together with other samples if possible. All analyses are done within the research setting and this will take many years, so will not benefit the participants directly, but may improve their medical care in the future.
Where is the study run from?
The coordinating centre is Clinical Genetics, Karolinska University Hospital, Stockholm.
The participating centres are:
1. Norrlands University Hospital in Umeå
2. Akademiska Sjukhuset in Uppsala
3. Sahlgrenska University Hospital in Göteborg
4. Universitetssjukhuset Linköping
5. Skånes Universitetssjukhus Lund
When is the study starting and how long is it expected to run for?
The study started up in Stockholm 2017 and has started/will start in the rest of the country in 2019. The study will continue until 2026.
Who is funding the study?
This study is supported by the Stockholm County Council and we are applying for further funding.
Who is the main contact?
1. Emma Tham, emma.tham@sll.se, Principal investigator, Consultant in Clinical Genetics, Ph.D. Karolinska University Hospital
2. Svetlana Bajalica Lagercrantz, Svetlana.lagercrantz@ki.se, Principal investigator, Chief physician Oncology/Clinical Genetics, Assistant Professor, Karolinska University Hospital
Contact information
Scientific
Department of Clinical Genetics
Karolinska University Hospital
Stockholm
17176
Sweden
 ORCID ID |
0000-0001-6079-164X |
|---|---|
| Phone | +46851770455 |
| emma.tham@sll.se |
Scientific
Department of Clinical Genetics
Karolinska University Hospital
Stockholm
17176
Sweden
| Phone | +46 851770000 |
|---|---|
| svetlana.lagercrantz@ki.se |
Study information
| Study design | Observational |
|---|---|
| Primary study design | Observational |
| Secondary study design | Longitudinal study |
| Study setting(s) | Hospital |
| Study type | Prevention |
| Participant information sheet | Not available in web format. Please use contact details to request a participant information sheet |
| Scientific title | Molecular Characterization and Clinical Aspects of Germline TP53 Mutations in the Swedish Constitutional TP53 Cohort. |
| Study acronym | SWEP53 |
| Study objectives | 1. Germline TP53 mutations are probably underdiagnosed in clinical practice and that by increasing awareness of this rare condition may improve diagnosis 2. Whole-body MRI/ultrasound/urinary tests can detect cancer at an earlier stage than symptoms and have an acceptable level of incidental findings 3. Circulating biomarkers can detect cancer at an early stage in these high-risk families 4. The quality of life and psychosocial health of TP53-carriers in an intensive surveillance program is better than without intensive surveillance 5. Genetic and environmental factors modulate risk for cancer in TP53-families 6. p53-reactivating compounds can have an anti-cancer effect on short term cell cultures from tumours originating from patients with germline TP53 mutations. |
| Ethics approval(s) | Approved 18/11/2015, Ethical review board of Stockholm (Swedish Ethical Review Authority, Etikprövningsmyndigheten, Box 2110, 750 02 Uppsala, Sweden; +46-10-475 08 00; registrator@etikprovning.se), ref: 2015/1600-31 with addition 2018/1690-32 |
| Health condition(s) or problem(s) studied | Germline TP53 mutation carriers |
| Intervention | The study involves four parts. Clinical information on cancer diagnoses, treatment, follow-up, genetic testing results and family history will be collected in a registry for all participants. In addition, participants can opt to: (1) donate blood/tissue samples for the molecular analyses and for circulating biomarkers for cancer; (2) participate in the surveillance programme with clinical examination and whole-body MRI for adults and ultrasound of the abdomen and urinary sample for children; and (3) fill out three questionnaires that measure quality of life, cancer worry and benefits/risks of surveillance. Whole-body MRI and standardised clinical examination is added to standard breast cancer surveillance. Blood samples for cell free DNA are collected at the same time as the surveillance. Participants fill out psychosocial questionnaires. |
| Intervention type | Other |
| Primary outcome measure | TNM and clinical stage measured by reviewing medical records, histopathology and radiological reports |
| Secondary outcome measures | 1. Number and distribution of detected premalignant lesions based on MRI examination for adults or ultrasound of the abdomen for children at baseline, at annual examination or by any radiological method used if symptoms arise during the interval between controls 2. The proportion of R0 / R1 / R2 tumor surgery based on surgical and radiological reports 3. Location and number of incidental findings that lead to additional examinations with radiology and/or invasive techniques after image diagnostics in the control program (i.e. on MRI examination or ultrasound examination at baseline or at annual examination) 4. Number of benign tumors detected using MRI/ultrasound at baseline or at annual examination 5. Tumor aggression (growth in serial imaging and information from histopathology report) 6. Measures of psychosocial health, i.e. compare year 5 with year 0 using SF36 Health Survey (widely used world-wide to measure patient reported outcomes), Cancer worry scale (Lerman C, 1994, Douma KH, 2010, Lammens CRM, 2010) and a questionnaire addressing the benefits and barriers to surveillance (Lammens CRM, 2010; Champion VL, 1984; Kash KM, 1992; Madalinska JB, 2007) 7. Measuring the penetrance, onset age, tumor spectrum, heredity, genotype-phenotype correlations of TP53 mutation carriers in Sweden to characterize the Swedish TP53 families based on review of medical records, pedigree data and genetic testing results 8. Practical feasibility of a national image-diagnostic surveillance program based on feedback from the radiologists, oncologists, pediatric oncologists and genetics departments at our annual workshops 9. Characterize the significance of new TP53 variants using cell-lines in the laboratory to test new TP53 variants 10. Discover modifying genetic/environmental factors using data from the risk factor questionnaire (local form) filled in at inclusion in the study and from genetic tests performed on the samples taken as part of this study 11.Investigate whether cell free DNA is a reliable biomarker for early cancer detection by analysing tumour-specific genetic changes in the blood at diagnosis of cancer and at all time points prior to cancer diagnosis to determine if cell free DNA could detect a cancer earlier than symptoms or MRI/ultrasound. 12. Test whether TP53 activating agents have an anti-tumor effect in vitro |
| Overall study start date | 09/01/2014 |
| Completion date | 31/12/2026 |
Eligibility
| Participant type(s) | Patient |
|---|---|
| Age group | All |
| Sex | Both |
| Target number of participants | 100 |
| Total final enrolment | 60 |
| Key inclusion criteria | 1. All carriers of a pathogenic TP53 germline variant over the age of 15 years OR all children (0-18 years) who have 50% risk of inheriting a pathogenic TP53 germline variant 2. Able to provide informed consent |
| Key exclusion criteria | 1. Individuals with a TP53 germline variant of unknown pathogenicity |
| Date of first enrolment | 01/01/2017 |
| Date of final enrolment | 31/12/2026 |
Locations
Countries of recruitment
- Sweden
Study participating centres
Stockholm
17 176
Sweden
Umeå
90737
Sweden
Uppsala
75185
Sweden
Göteborg
41345
Sweden
Lund
22242
Sweden
Linköping
58185
Sweden
Sponsor information
Hospital/treatment centre
Karolinska University Hospital
Stockholm
17176
Sweden
| Phone | +46 851770000 |
|---|---|
| svetlana.lagercrantz@ki.se | |
| Website | https://www.karolinska.se/om-oss/ |
"ROR" |
https://ror.org/02zrae794 |
Funders
Funder type
Government
Government organisation / Local government
- Alternative name(s)
- Stockholm County Council
- Location
- Sweden
No information available
Results and Publications
| Intention to publish date | 31/12/2027 |
|---|---|
| Individual participant data (IPD) Intention to share | Yes |
| IPD sharing plan summary | Other |
| Publication and dissemination plan | Plan to publish study protocol 2019/2020 and then baseline analysis of whole body MRI planned approximately one year after national inclusion start (2021) as well as a final data analysis. Will also analyse psychosocial aspects of surveillance programs. |
| IPD sharing plan | All data generated or analysed during this study will be included in the subsequent results publication |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Abstract results | conference abstract | 17/06/2019 | 11/10/2019 | No | No |
| Other publications | rationale and design | 13/01/2020 | 19/04/2021 | Yes | No |
| Results article | cancer worry, perceived benefits and risks to surveillance and overall health | 05/01/2023 | 07/11/2023 | Yes | No |
| Results article | sub-study of WB-MRI findings generated by the baseline examination | 14/01/2022 | 07/11/2023 | Yes | No |
Editorial Notes
14/04/2025: Internal review.
07/11/2023: Two publication references and total final enrolment added.
19/04/2021: Publication reference added.
11/10/2019: Trial’s existence confirmed by Ethical review board of Stockholm
