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Clinical Trial Details — Status: Active, not recruiting

Administrative data

NCT number NCT04206891
Other study ID # IEO 0834/
Secondary ID
Status Active, not recruiting
Phase
First received
Last updated
Start date December 1, 2018
Est. completion date December 30, 2023

Study information

Verified date January 2023
Source European Institute of Oncology
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

Invasive lobular breast carcinoma (ILBC) represents 5-15% of all invasive BCs. The CDH1 gene (OMIM no. 192090), located on the chromosome 16q22.1, encodes for the E-cadherin protein, a key regulator of cell adhesion. Loss of E-cadherin expression is frequently detected in LBC CDH1 germline loss-of-function mutations are associated with the autosomal dominant cancer-predisposition syndrome, hereditary diffuse gastric cancer (HDGC; OMIM no. 137215). The cumulative risk of LBC for women with a CDH1 mutation is estimated to be 42% (95% CI 23% to 68%) by 80 years, when it is a component of HDGC syndrome. Recently, some authors described CDH1 germline mutations in women with in situ or ILBC with early onset (<45 or <50) and bilateral in situ or ILBC with no family history of HDGC. These results are opening a new scenario, suggesting that CDH1 could be a susceptibility gene for LBC in women without a family history of DGC. The first aim of this study is to investigate prevalence of CDH1 in this specific population of women with early onset (<45 or <50) in situ or ILBC, bilateral LBC or LBC with no family history of HDGC.


Description:

Invasive lobular breast carcinoma (ILBC) represents 5-15% of all invasive BCs. LBC presents relevant differences in the transcriptomic profiles, metastatic pattern, and clinical behaviour compared to infiltrating ductal BC. The CDH1 gene (OMIM no. 192090), located on the chromosome 16q22.1, encodes for the E-cadherin protein, a key regulator of cell adhesion. Loss of E-cadherin expression is frequently detected in LBC. CDH1 germline loss-of-function mutations are associated with the autosomal dominant cancer-predisposition syndrome, hereditary diffuse gastric cancer (HDGC; OMIM no. 137215). The cumulative risk of LBC for women with a CDH1 mutation is estimated to be 42% (95% CI 23% to 68%) by 80 years, when it is a component of HDGC syndrome. Recently, updated clinical guidelines for CDH1 testing criteria have been published. For LBC, CDH1 genetic screening has been suggested for families with diagnosed of both DGC and LBC (one diagnosis before the age of 50) and patients with bilateral or familial LBC before the age of 50. Recently, some authors described CDH1 germline mutations in women with in situ or ILBC with early onset (<45 or <50) and bilateral in situ or ILBC with no family history of HDGC. These results are opening a new scenario, suggesting that CDH1 could be a susceptibility gene for LBC in women without a family history of DGC. The investigators have revised all literature data about early-onset LBC and CDH1 germline mutations, excluding pedigrees associated with DGCs. In detail, 482 cases of LBCs were screened for CDH1 constitutional mutations. Family history for breast carcinoma was documented in 40.7 % of the considered probands and 20.3 % presented a bilateral BC manifestation. Mean age at onset was 46 years. Fourteen novels deleterious alterations (2.9 %) have been reported; 5 were missense (35.7 %), 3 mutations affected the splicing sites (21.4 %), 3 deletions (21.4 %), 2 insertions (14.3 %) and 1 stop codon (7.2 %). These mutations affect different CDH1 gene domains, spanning almost all 16 exons and introns 1-7-13 boundaries. Two missense mutations were defined as potentially pathogenic variants in vitro and in silico analysis [Corso et al. Fam Cancer 2016]. Overall, about 3% of the screened population with LBC have a mutation. To date, no clear-cut genetic indicators for increased risk have been identified in patients with lobular breast cancer (LBC). The first aim of this study is to investigate prevalence of CDH1 in this specific population of women with early onset (<45 or <50) in situ or ILBC, bilateral LBC or LBC with no family history of HDGC. The investigators hypothesize that CDH1 is a susceptibility gene for LBC and that a novel and rare syndrome (called as hereditary LBC), independent from the classic HDGC setting, should be described, especially in subjects with early onset of LBC, before 45 years at diagnosis, and in bilateral LBC manifestation.


Recruitment information / eligibility

Status Active, not recruiting
Enrollment 421
Est. completion date December 30, 2023
Est. primary completion date December 31, 2021
Accepts healthy volunteers No
Gender Female
Age group 18 Years and older
Eligibility Inclusion Criteria: - Bilateral lobular breast cancer or Lobular breast cancer with age at onset <= 45 years or Lobular breast cancer with family history for breast cancer - Patients with blood available in IEO biobank Exclusion Criteria: - Patients with a previous cancer (except for colon cancer, stomach cancer and lobular breast cancer). - Patients with germline BRCA1/2 patogenetic mutation will be excluded

Study Design


Locations

Country Name City State
Italy European Institute of Oncology Milan

Sponsors (1)

Lead Sponsor Collaborator
European Institute of Oncology

Country where clinical trial is conducted

Italy, 

Outcome

Type Measure Description Time frame Safety issue
Primary Relative frequency of patients with a mutation in CDH1 germline Number of patients with mutation in CDH1 germline per each group identified 6 months
Secondary Frequency of patients with a mutation in CDH1 germline by disease status Number of patients with a mutation in CDH1 germline stratified by disease status to investigate the prevalence of this mutation status between invasive and in situ BC 6 months
Secondary Frequency of patients with a mutation in CDH1 germline by clinical strata Number of patients with a mutation in CDH1 germline stratified by clinical data to investigate the prevalence of this mutation status betweenr early onset LBC (<45 years), bilateral LBC and LBC with family history for breast cancer 6 months
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