Learn About The Science Behind the BBDRisk Dx® Test
The BBDRisk Dx® test is based on more than a decade of Research and Development. Silbiotech, Inc. has developed the BBDRisk Dx® test to address the unmet need for managing patients diagnosed with high risk masses including atypias, usual hyperplasias and papillomas.
Discovery of Risk Signature
Previously Dr. Poola and colleagues undertook ground breaking research to understand the biology of atypical hyperplasias with funding from the National Cancer Institute (NCI), National Institutes of Health (NIH) and Susan G. Komen for the Cure. For the first time they showed that progression to cancer was associated with significantly increased levels of several cancer markers and the activation of a number of pathways that are known to promote cancer development. They also showed that increased levels of certain oncoproteins predicted the actual development of breast cancer. These findings were published in highly prestigious medical journals (Nature Medicine 2005, PMID: 15864312; Clinical Cancer Research 2006, PMID: 16899629; Clinical Cancer Research 2008, PMID: 18281563; Cancer Prevention Research 2019, PMID: 31239263).
The following publications are the scientific basis for BBDRisk Dx® Test development.
BBDRisk Dx® Clinical Test Development
Silbiotech, Inc. expanded upon the published information with SBIR grant funds from the National Science Foundation (NSF, grant number IIP-1314287) and the NCI, NIH (CA173919 and CA206774) to develop the BBDRisk Dx® test including validation of novel biomarkers and design of a proprietary algorithm for risk stratification (Cancer Prevention Research 2019, PMID: 31239263).
The Science Behind the BBDRisk Dx® Test Includes Validation
The BBDRisk Dx® test was developed and validated using a total of 550 samples from several prominent institutions (UCLA Medical School, California, Leeds Hospital, UK, Howard University Medical School, Washington, D.C. and Hartford Hospital, Connecticut). Of the 550 samples, 250 were from patients who subsequently developed cancer after a minimum of 1 year and a maximum of 13 years (cancer developed group). The other 300 samples were from patients who had no prior breast cancer and did not develop cancer for a minimum of 5 years and a maximum of 19 years (cancer-free group). The sample size of 550 used for test validation gives a power of more than 99% and a significance level of 0.0001.
We describe in the publication, Cancer Prevention Research (2019, vol.12 pp 471-80; PMID:31239263), that the BBDRisk Dx® test predicts cancer development equally for
- all age groups
- the biopsied breast or the opposite breast
- premenopausal and postmenopausal patients
In the above publication, data are presented on stratification of patients’ risk into low, intermediate and high for the first 5 years, 10 years and beyond after biopsy. For atypical hyperplasia patients the cancer rates are:
- Low Risk – 0% in the first 5 years and 3% beyond 5
- Intermediate Risk – 12% in the first 5 years and up to 20% beyond 5
- High Risk – 73% in the first 5 years and up to 93% beyond 5
In patients diagnosed with usual ductal hyperplasias, papillomas or any a combination, the cancer rates are
- Low Risk – 2% in the first 5 years and up to 3% beyond 5
- Intermediate Risk – 15% in the first 5 years and up to 25% beyond 5
- High Risk – 34% in the first 5 years and up to 83% beyond 5
BBDRisk Dx® – First and Only Genomic Test for Breast Hyperplasia Masses
The BBDRisk Dx® test is the first biological risk stratification tool developed specifically for hyperplasia masses. The algorithm developed provides the most comprehensive risk assessment available. Based on the BBDRisk Dx® test results the patients and healthcare providers can now make an informed decision in managing the breast disease.