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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT01231386
Other study ID # 09147
Secondary ID
Status Recruiting
Phase
First received
Last updated
Start date November 2009
Est. completion date April 2019

Study information

Verified date June 2018
Source City of Hope Medical Center
Contact George Somlo, MD
Phone 800 826-4673
Email gsomlo@coh.org
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

MicroRNAs (MiRNAs) regulate the translation of RNAs and are implicated in cell proliferation and renewal both under physiologically normal as well as in malignant conditions. Dysregulation of specific miRNAs may be associated with either gaining oncogenic or loosing tumor suppressing functions. MiRNA dysregulation has been implicated in breast cancer tumorigenic (stem cell) and non-tumorigenic development. Therefore, miRNA profiling of treatment naïve and treatment-exposed breast tumors and sequential samples of blood/serum will allow for identification of miRNA markers of prognosis and as indicators and potential targets for personalized therapies. In this proposal, specimens from patients treated in the clinical breast cancer program on already existing protocols (IRB 05091 and 05015) will be characterized by Dr. Rossi's laboratory and collaborators, and the information gained will be applied to develop specific therapies.


Description:

Current neoadjuvant or adjuvant treatment strategies do not allow for rationale incorporation of such agents. One needs tools to predict both de novo and acquired resistance to therapeutic agents. This is a difficult task, due to the compound nature of escape routes: tumor exposure is usually to a combination of therapeutic agents and the mechanisms of resistance are broad: intrinsic resistance due to existing mutations, or regulatory - miRNA, other epigenetic - alterations, polymorphisms, tumor cell adaptation via new mutations and activation of alternative pathways, lack of optimal pharmacokinetics/genomics, activation of efflux mechanisms, accelerated repair mechanisms are involved.

Similarly, not all patients who are candidates for primary surgical intervention to be followed by post-operative adjuvant therapy benefit from such systemic treatments. The mechanisms of resistance be it de novo in surviving stem cell/tumorigenic components, or acquired by cells left behind "dormant" after the surgical intervention, are not well delineated.

Breast tumors subjected to neoadjuvant chemotherapy allow for baseline and treatment-effected sampling. Characterization of core biopsy specimens of primary tumors procured prior to exposure to neoadjuvant therapy from different varieties of breast cancer subtypes, and of subsequent mid-treatment and intraoperative (procured during definitive surgery following completion of neoadjuvant therapy) samples should help to assess the predictive value of the pre-treatment and post-treatment miRNA expression profile for complete and near complete response, as a surrogate marker for survival. Similarly, patterns of de novo and acquired resistance may emerge when assessment of pre- and post treatment miRNA expression profiles are analyzed in a supervised manner of classification using pathological response as classifier. Samples obtained from patients with primary surgical removal of their tumors before any systemic treatment exposure on the other hand, will allow for determining markers of prognosis, and predictors for response to therapeutic targeting agents.

Time Perspective: Retrospective/Prospective


Recruitment information / eligibility

Status Recruiting
Enrollment 165
Est. completion date April 2019
Est. primary completion date April 2019
Accepts healthy volunteers No
Gender Female
Age group 18 Years and older
Eligibility Inclusion Criteria:

- Female,

- Breast Cancer

- > 18 years,

- regardless of histology, treatment phase, or stage

Exclusion Criteria:

Study Design


Related Conditions & MeSH terms


Locations

Country Name City State
United States City of Hope Duarte California

Sponsors (1)

Lead Sponsor Collaborator
City of Hope Medical Center

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Performance of miRNA profiling from tumor samples from primary breast tumors 3 years after completion of sample collection
Primary Assessment of miRNA profiles from blood/serum samples from patients at baseline, and if feasible, at different time points 3 years after completion of sample collection
Primary Analysis of miRNA findings and correlate miRNA patterns of expression in tumor, lymph nodes -if available- and in serum 3 years after competion of sample collection
Primary Correlation of classic tumor markers such as estrogen and progesterone receptor (ER,PR), and HER2 expression with tumor stage and grade 3 years after completion of sample collection
Primary Determination of specific miRNA functions 3 years after completion of sample collection
Primary Determination of ability to knock down functionally relevant overexpressed miRNAs by miR-sponge/antagomirs 3 years after completion of sample collection
Primary Design of prospective pilot phase I-II trials to interfere with dysfunctional/dysregulated miRNA expression 3 years after completion of sample collection
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