Clinical trial NCT05404334: of Androgen Receptor Expression in Breast Cancer With or Without BRCA Mutation
Official title: Clinico-pathological Study of Androgen Receptor Expression in Breast Cancer With or Without BRCA Mutation
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Breast Cancer
Lead sponsor: Banaras Hindu University
Sponsor class: OTHER
First posted: 2022-06-03
Enrollment: 231
Sex: FEMALE
Minimum age (years): 18
Maximum age (years): 99
Standard ages: ADULT
OLDER_ADULT
Observational model: CASE_CONTROL
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients with breast cancer and benign breast diseases

Brief summary: Androgen Receptor is extensively expressed in BRCA and its role in the disease may differ depending upon molecular subtypes and stages. Androgen Receptor (AR) may act as an antagonist of estrogen receptor α (ERα), in ERα induced effect, whereas in the absence of estrogens, AR may act as an agonist, of ERα- promoting tumor. Thus, depending on the BRCA micro-environment, both agonists and antagonists of the AR have been suggested for therapeutic approaches.

Detailed description: The rate of AR positivity in breast cancer is about 60% to 80%. Biologically the AR pathway has cross talk with several other key signaling pathway, including the PI3K/Akt/mTOR and MAPK Pathways, and with other receptor, including estrogen receptor and human epidermal growth factor receptor-2. In clinical trials in patients with breast cancer, AR targeted therapies such as AR agonists, AR antagonists, PARP inhibitors, and PI3K inhibitors have shown promising results. The use of AR targeted therapies in conjunction with other agent has been investigated for overcoming resistance to AR focused treatments. Thus, the value of AR positivity as a prognostic marker has not been identified. Several retrospective clinical studies have shown that AR might be a prognostic or predictive factor in breast cancer. BRCA1 mutation accounts for the progress of hereditary breast cancers and is in connection with unique clinicopathological characteristics compared with sporadic breast cancers. The database is still evolving and newer mutation and their significance is being found every day. Also, there were several limitations to these previous studies. First, the cut-off for AR positivity was arbitrary. In most of the studies, the cut-off points were 1% or 10% and weren't enough to predict carcinoma survival. Moreover, quite 90% of the studies were conducted in non-Asian regions. Most of the studies involving Asian patients studied the prognostic role of AR in TNBC patients, with inconclusive results. There are only a few studies from Indian continents and none has correlated the AR expression with BRCA.

After the written inform consent in case of fresh recruitment the blood will be collected and tissue blocks will be obtained, use of already available blocks of patients who earlier participated in another study is also proposed.

(a) Samples will be stored for DNA study and will be frozen in liquid nitrogen and stored at -80 °C until further processing.

(samples will store in 10% formalin at room temperature (RT) for Immunohistochemistry

Eligibility criteria: Inclusion Criteria:

* Histology proven cases of breast cancer

Exclusion Criteria:

* Patients with prior treatment
* Pregnant and lactating women

Primary outcomes:
measure: Receptor expression
timeFrame: 6 months
measure: BRCA1 and BRCA2 mutations
timeFrame: 6 months
Secondary outcomes:
measure: AR and BRCA
timeFrame: 6 months
Other outcomes:
Locations:
city: Varanasi
country: India
facility: Banaras Hindu University
state: UP
Study officials:
affiliation: Banaras Hindu University
name: Manoj Pandey, MS, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Anand A, Singh KR, Kumar S, Husain N, Kushwaha JK, Sonkar AA. Androgen Receptor Expression in an Indian Breast Cancer Cohort with Relation to Molecular Subtypes and Response to Neoadjuvant Chemotherapy - a Prospective Clinical Study. Breast Care (Basel). 2017 Jul;12(3):160-164. doi: 10.1159/000458433. Epub 2017 Jun 16.
citation: Vidula N, Yau C, Wolf D, Rugo HS. Androgen receptor gene expression in primary breast cancer. NPJ Breast Cancer. 2019 Dec 10;5:47. doi: 10.1038/s41523-019-0142-6. eCollection 2019.
citation: Zhang L, Fang C, Xu X, Li A, Cai Q, Long X. Androgen receptor, EGFR, and BRCA1 as biomarkers in triple-negative breast cancer: a meta-analysis. Biomed Res Int. 2015;2015:357485. doi: 10.1155/2015/357485. Epub 2015 Jan 28.