Title

Dose-Escalation Phase 1 Study of G-202 (Mipsagargin) in Patients With Advanced Solid Tumors
An Open Label, Single-Arm, Dose-Escalation Phase 1 Study of G-202 (Mipsagargin) in Patients With Advanced Solid Tumors
  • Phase

    Phase 1
  • Study Type

    Interventional
  • Status

    Completed No Results Posted
  • Study Participants

    30
This is an open-label, single-arm, dose-escalation Phase I study to determine the maximum tolerated dose (MTD) of G-202 (mipsagargin) when administered once daily for 3 consecutive days of a 28-day cycle in patients with advanced solid tumors. G-202 will be administered by intravenous infusion over 1 hour on Days 1, 2 and 3 of each 28-day cycle.
Pro-drug chemotherapy is an approach to cancer treatment that is being investigated as a means to achieve higher concentrations of cytotoxic or biologically active agents at a tumor location while avoiding systemic toxicity. With pro-drug chemotherapy, a relatively non-toxic form of a cytotoxin, the pro-drug, is converted into the active cytotoxic agent at the tumor site or other specific location. G-202 (mipsagargin) is a thapsigargin pro-drug; it consists of a cytotoxic analog of thapsigargin coupled to a masking peptide which inhibits its biologic activity until proteolytic cleavage at the tumor site. Thapsigargin is a natural product with profound effects on cell viability. Thapsigargin is a non-cell-type specific toxin with documented ability to kill a broad spectrum of cancer cell lines as well as normal endothelial cells, fibroblasts and osteoblasts. It induces a rapid and pronounced increase in the concentration of cytosolic calcium, due to blockade of the Sarcoplasmic/Endoplasmic Reticulum Calcium ATPase (SERCA) pump to which it binds with high affinity. The increase in cytosolic calcium leads to induction of apoptosis and ensuing cell death.

The anti-tumor effect of G-202 in humans with advanced solid tumors is not yet known.
Study Started
Jan 31
2010
Primary Completion
Dec 31
2012
Study Completion
Aug 31
2013
Last Update
Dec 10
2015
Estimate

Drug G-202

Thapsigargin is Pro-drug chemotherapy which will be administered by intravenous infusion over 1 hour on Days, 1, 2 and 3 of each 28 day cycle

G-202 Experimental

Criteria

Inclusion Criteria:

Histologically-confirmed malignancy that is metastatic or unresectable and for which standard curative measures do not exist or are no longer effective
Disease that is measurable and/ or evaluable by RECIST criteria. Patients with prostate cancer require presence of disease on bone scan and/or CT scan and evidence of increasing PSA after standard hormonal therapy
ECOG Performance Status ≤ 2
Life expectancy estimated to be at least 3 months

Acceptable liver function:

In the absence of disease involvement in the liver and if bilirubin ≤ 1.5 times institutional upper limit of normal (ULN), AST (SGOT), ALT (SGPT) and GGT may be ≤ 2 times ULN
In the presence of disease involvement in the liver and if bilirubin ≤ 1.5 times institutional upper limit of normal (ULN), AST (SGOT), ALT (SGPT) and GGT may be ≤ 5 times ULN
Alkaline phosphatase ≤ 2.5 times ULN Patients with bone metastases alkaline phosphatases ≤ 5 times ULN

Acceptable renal function:

Serum creatinine ≤ 1.5 times ULN, OR
Calculated creatinine clearance ≥ 50 mL/min (Cockcroft-Gault formula)

Acceptable hematologic status:

Absolute neutrophil count (ANC) ≥ 1500 cells/mm3 (1.5 ×109/L)
Platelet count ≥ 100,000 platelet/mm3 (100 ×109/L)
Hemoglobin ≥ 9 g/dL
Urinalysis with no evidence of proteinuria
Acceptable coagulation profile (PT or INR, PTT) < 1.5 times ULN
At least 4 weeks since prior chemotherapy or surgery, with recovery to Grade 1 or baseline of significant toxicities felt related to prior drug(s)
Women of childbearing potential must have a negative serum pregnancy test at screening.
All patients (males and females) of child-bearing potential must agree to use an effective method of birth control
Ability to understand and willingness to sign a written informed consent document
Patients with prostate cancer must continue androgen deprivation therapy with LHRH agonists

Exclusion Criteria:

Documentation of keratosis follicularis, also known as Darier or Darier-White disease
Known hypersensitivity to any study drug component, including thapsigargin derivatives, Polysorbate 20, or propylene glycol
Patients with known and untreated brain metastases. Patients with brain metastases that have been treated and demonstrated to be clinically stable for at least 30 days may be enrolled onto the study
Patients with a family history of coagulopathy or patients with DVT or pulmonary embolus within the last 6 months
Patients taking anti-coagulants that include Coumadin or low molecular weight heparin

Patients with pre-existing cardiac conditions:

Prior documented myocardial infarction within the last 6 months
Pre-existing cardiac failure (NYHA class III-IV)
Atrial fibrillation on anti-coagulants
Unstable angina
Severe valvulopathy
Cardiac angioplasty or stenting within the last 6 months
Use or requirement for use of inhibitors or inducers of cytochrome isoenzymes
Corrected QTc prolongation value, calculated using Bazett's formula (QTcB = QT/RR ½), > 450 msec
Pregnant or lactating females
Evidence of serious and/or unstable pre-existing medical, psychiatric or other condition (including laboratory abnormalities) that could interfere with patient safety or provision of informed consent to participate in this study
Active uncontrolled infection, including known history of AIDS or hepatitis B or C
Any psychological, sociological, or geographical condition that could potentially interfere with compliance with the study protocol and follow-up schedule
Concurrently receiving any other investigational agents while on study
No Results Posted