Ignite Creation Date:
2024-05-05 @ 4:56 PM
Last Modification Date:
2024-10-26 @ 9:26 AM
Study NCT ID:
NCT00354900
Status:
TERMINATED
Last Update Posted:
2009-08-04
First Post:
2006-07-18
Brief Title:
Phase I Study of Aprotinin in Advanced Breast Cancer
Sponsor:
Dartmouth-Hitchcock Medical Center
Organization:
Dartmouth-Hitchcock Medical Center
Study Overview
Official Title:
Phase I Study of Aprotinin in Advanced Breast Cancer
Status:
TERMINATED
Status Verified Date:
2009-08
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
The FDA changed the labeling for this agent and we felt we could not offer it to patients on a non-surgical study
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
There is an intimate relationship between processes which promote growth invasion and metastasis of cancers and processes which regulate blood clotting The enzymes uPA and PAI-1 are key regulators of the remodeling of recently formed blood clots and there is substantial information linking greater levels of uPA and PAI-1 in breast cancers with a greater likelihood of breast cancer recurrence and death As uPA and PAI-1 are excellent markers for a cancers aggressive clinical behavior uPA and PAI-1 may be potential targets for anticancer therapy Aprotinin is an inhibitor of uPA activation and has been approved by the FDA to reduce blood loss in patients undergoing cardiopulmonary bypass surgery Studies in animals and limited studies in patients have shown that Aprotinin slows the growth of tumors Our hypothesis is that uPA is chronically activated in malignancies and that inhibition of uPA by Aprotinin would slow the rate of progression of breast cancer
Detailed Description:
Urokinase-type plasminogen activator uPA is a serine protease whose physiologic function is to catalyze the conversion of plasminogen to the active proteolytic form plasmin for participation in processes which require tissue remodeling such as wound healing embryogenesis and inflammatory responses uPA is among numerous tissue proteases also found in association with neoplastic disease playing a pathologic role in tumor growth and metastasis The activity of uPA can be neutralized by a specific inhibitor plasminogen activator inhibitor type-1 PAI-1 which forms inactive complexes of 11 stoichiometry with the plasminogen activators Through inhibition of uPA and tPA PAI-1 inhibits plasmin the inhibitory effect should limit the extent of extracellular matrix protein degradation and reduce activation of MMPs and angiogenic growth factors such as VEGF However tissue overexpression of PAI-1 correlates with more aggressive clinical behavior of the malignancy In fact the upregulation of PAI-1 may be a cellular attempt to return to homeostasis which is disrupted by activation of uPA or other factors Upregulation of PAI-1 may be an indicator that uPA or some other pathway is contributing to an aggressive phenotype Co-expression of uPA and PAI-1 in primary breast tumor tissue is associated with a greater risk of locoregional and distant recurrence a poorer response to adjuvant hormonal or chemotherapy and a shorter survival Elevation of circulating PAI-1 in patients with metastatic breast cancer is associated with a shorter survival
We hypothesize that uPA activation is in part responsible for the clinical progression of malignancy Inhibition of uPA is therefore a rational strategy for the control of advanced breast cancer Aprotinin is a safe and effective protease inhibitor of both uPA and plasmin Aprotinin is approved for the treatment of septic shock and for the prevention of blood loss in patients undergoing cardiopulmonary bypass surgery In patients undergoing cardiopulmonary bypass surgery Aprotinin blunts the acute increase in fibrinolytic activity caused by uPA and decreases the expression of counter-regulatory PAI-1 In several in vivo tumor models Aprotinin inhibits tumor growth invasiveness and metastasis Limited experience in patients with cancer suggests prolongation of survival in patients treated with a single or multiple doses of Aprotinin We hypothesize that Aprotinin would delay disease progression by decreasing the chronic activation of uPA and PAI-1 and that delay of tumor progression would correlate with inhibition of laboratory measures of fibrinolysis
This is a Phase I trial Patients with metastatic breast cancer will receive escalating doses of Aprotinin in one of four dose cohorts ranging from 20 x 106 KIU to 60 x 106 KIU Three to six patients will be entered at each dose cohort and the maximum tolerated dose will be defined as the highest dose at which fewer than 33 of patients experience a dose limiting toxicity A total of nine patients will be entered at the maximum tolerated dose The extent of disease will be assessed radiologically at baseline and again at 6 12 18 and 24 weeks after treatment with Aprotinin Coagulation parameters including PTPTT D-Dimer FDPs uPA and PAI-1 will be assayed at baseline and at several intervals out to 30 days after treatment with Aprotinin
We hypothesize that uPA activation is in part responsible for the clinical progression of malignancy Inhibition of uPA is therefore a rational strategy for the control of advanced breast cancer Aprotinin is a safe and effective protease inhibitor of both uPA and plasmin Aprotinin is approved for the treatment of septic shock and for the prevention of blood loss in patients undergoing cardiopulmonary bypass surgery In patients undergoing cardiopulmonary bypass surgery Aprotinin blunts the acute increase in fibrinolytic activity caused by uPA and decreases the expression of counter-regulatory PAI-1 In several in vivo tumor models Aprotinin inhibits tumor growth invasiveness and metastasis Limited experience in patients with cancer suggests prolongation of survival in patients treated with a single or multiple doses of Aprotinin We hypothesize that Aprotinin would delay disease progression by decreasing the chronic activation of uPA and PAI-1 and that delay of tumor progression would correlate with inhibition of laboratory measures of fibrinolysis
This is a Phase I trial Patients with metastatic breast cancer will receive escalating doses of Aprotinin in one of four dose cohorts ranging from 20 x 106 KIU to 60 x 106 KIU Three to six patients will be entered at each dose cohort and the maximum tolerated dose will be defined as the highest dose at which fewer than 33 of patients experience a dose limiting toxicity A total of nine patients will be entered at the maximum tolerated dose The extent of disease will be assessed radiologically at baseline and again at 6 12 18 and 24 weeks after treatment with Aprotinin Coagulation parameters including PTPTT D-Dimer FDPs uPA and PAI-1 will be assayed at baseline and at several intervals out to 30 days after treatment with Aprotinin
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None