This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Systemic Dickkopf-related Protein 1 (DKK1)During Estrogen Level Changes in Post-menopausal Breast Cancer Patients Treated With Aromatase Inhibitors

This study has been completed.
Information provided by (Responsible Party):
University of Arkansas Identifier:
First received: September 8, 2011
Last updated: November 3, 2015
Last verified: November 2015

The investigators are hypothesizing that decreasing estrogen levels will cause serum DKK1 to peak, then decrease gradually as estrogens reach a new lower, but steady level. The investigators also believe that the peak in DKK1 will initiated a wave of stem cell diversion from the osteoblastogenic pathway to the adipogenic pathway.

The investigators will conduct a longitudinal cohort study of post menopausal women with hormone-responsive breast cancer that will be treated AIs. The study will observe anthromorphic and serum marker changes during the first year of their treatment.

Breast Cancer

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Systemic DKK1 During Estrogen Level Changes in Post-menopausal Breast Cancer Patients Treated With Aromatase Inhibitors

Resource links provided by NLM:

Further study details as provided by University of Arkansas:

Primary Outcome Measures:
  • Estrogen level suppresses DKK1 [ Time Frame: 26 weeks ]
    With the start of AI treatment, estrogen levels will decline to almost undetectable levels. We believe this decrease in estrogen will lift suppression of DKK1 and allow its expression to peak during the 1st month of treatment, and decline more slowly thereafter. During the first 26 weeks of treatment, we expect levels of CTx to rise, PTH to fall, and P1NP to show no change, findings that would be consistent with Heshmati's study.

Enrollment: 17
Study Start Date: April 2011
Study Completion Date: August 2015
Primary Completion Date: August 2015 (Final data collection date for primary outcome measure)
Post menopausal breast cancer patients


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Post menopausal breast cancer patients who are planning to be treated with aromatase inhibitors.

Inclusion Criteria:

  • Post Menopausal Breast cancer patients with planned treatment of aromatase inhibitors.
  • 18 years or older

Exclusion Criteria:

  • BMI >30 or <18
  • Osteoporosis as defined by protocol.
  • Subjects currently on bisphosphonate therapy.
  • History of primary or secondary hyperparathyroidism
  • History of Hypo-or Hyperthyroidism
  • History of Vitamin D levels below LLN
  • History of creatinine clearance below the EGFR
  • History ofLiver function tests above 1.5 times ULN including LDH, SGOT, SGPT, Alkaline phosphatase, and Bilirubin
  • History of documented cirrhosis of the liver
  • History of chronic heparin use
  • History of chronic glucocorticoid therapy
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01431872

United States, Arkansas
University of Arkansas for Medical Sciences
Little Rock, Arkansas, United States, 72120
Sponsors and Collaborators
University of Arkansas
Principal Investigator: Laura Hutchins, MD University of Arkansas
  More Information

Responsible Party: University of Arkansas Identifier: NCT01431872     History of Changes
Other Study ID Numbers: 131471
Study First Received: September 8, 2011
Last Updated: November 3, 2015

Keywords provided by University of Arkansas:
Aromatase Inhibitors

Additional relevant MeSH terms:
Breast Neoplasms
Neoplasms by Site
Breast Diseases
Skin Diseases
Aromatase Inhibitors
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs
Steroid Synthesis Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Estrogen Antagonists
Hormone Antagonists processed this record on August 21, 2017