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Obatoclax Mesylate and Topotecan Hydrochloride in Treating Patients With Relapsed or Refractory Small Cell Lung Cancer or Advanced Solid Tumors

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00521144
Recruitment Status : Completed
First Posted : August 27, 2007
Results First Posted : July 22, 2014
Last Update Posted : May 5, 2015
Information provided by (Responsible Party):
National Cancer Institute (NCI)

Brief Summary:
This phase I/II trial is studying the side effects and best dose of obatoclax mesylate when given together with topotecan hydrochloride and to see how well they work in treating patients with relapsed or refractory small cell lung cancer or advanced solid tumors. Obatoclax mesylate may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Drugs used in chemotherapy, such as topotecan hydrochloride, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Giving obatoclax mesylate together with topotecan hydrochloride may help kill more tumor cells

Condition or disease Intervention/treatment Phase
Recurrent Small Cell Lung Cancer Unspecified Adult Solid Tumor, Protocol Specific Drug: obatoclax mesylate Drug: topotecan hydrochloride Other: laboratory biomarker analysis Phase 1 Phase 2

Detailed Description:


I. Determine the maximum tolerated dose, recommended phase II dose, and toxicity profile of obatoclax mesylate when administered with topotecan hydrochloride in patients with advanced solid tumors. (Phase I) II. Determine the response rate in patients with relapsed or refractory small cell lung cancer treated with obatoclax mesylate and topotecan hydrochloride. (Phase II)


I. Evaluate the expression of pro- and anti-apoptotic proteins which may correlate with obatoclax mesylate sensitivity or resistance.

OUTLINE: This is a phase I dose-escalation study of obatoclax mesylate followed by a phase II study.

PHASE I (solid tumor): Patients receive obatoclax mesylate IV over 3 hours on day 1 OR days 1 and 3 and topotecan hydrochloride IV over 30 minutes on days 1-5. Courses repeat every 3 weeks in the absence of disease progression or unacceptable toxicity.

PHASE II (small cell lung cancer): Patients receive obatoclax mesylate and topotecan hydrochloride at the recommended phase II dose (RPTD) determined in phase I. Courses repeat every 3 weeks in the absence of disease progression or unacceptable toxicity.

Tumor tissue samples from patients with small cell lung cancer may be collected at baseline for correlative studies. Tissue samples are analyzed for biomarkers and protein expression of Bcl-2, Bcl-Xl, MCL-1, Bax, Bad, c-Myc, L-Myc, and N-Myc by immunohistochemistry.

After completion of study treatment, patients are followed for 30 days.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 22 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Phase I/II Study of Obatoclax Mesylate (GX15-070MS), a Bcl-2 Antagonist, Plus Topotecan in Relapsed Small Cell Lung Carcinoma
Study Start Date : August 2007
Actual Primary Completion Date : August 2010
Actual Study Completion Date : August 2010

Arm Intervention/treatment
Experimental: Treatment (enzyme inhibitor therapy and chemotherapy)
Patients receive obatoclax mesylate IV over 3 hours on day 1 OR days 1 and 3 and topotecan hydrochloride IV over 30 minutes on days 1-5. Courses repeat every 3 weeks in the absence of disease progression or unacceptable toxicity
Drug: obatoclax mesylate
Given IV
Other Name: GX15-070MS

Drug: topotecan hydrochloride
Given IV
Other Names:
  • hycamptamine
  • Hycamtin
  • SKF S-104864-A
  • TOPO

Other: laboratory biomarker analysis
Correlative studies

Primary Outcome Measures :
  1. Overall Response Rate (Phase II) [ Time Frame: Every 6 weeks, assessed up to 30 days ]
    Per Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.0) for target lesions and assessed by MRI: Complete Response (CR), Disappearance of all target lesions; Partial Response (PR), >30% decrease in the sum of the longest diameter of target lesions; Overall Response (OR)=CR +PR

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Histologically or cytologically confirmed diagnosis of 1 of the following:

    • Advanced solid tumor (phase I)

      • Topotecan hydrochloride must be an appropriate treatment for this cancer
    • Small cell lung cancer (SCLC) (phase II)

      • Progressed after one prior platinum-based chemotherapy regimen
      • Pathology materials (tumor tissue) will be used for correlative studies, if available
  • No progressive brain metastases

    • Treated brain metastases allowed provided patient is neurologically stable and does not require steroids
  • No leptomeningeal involvement
  • ECOG performance status (PS) 0-1 OR Karnofsky PS 70-100%
  • Leukocytes ≥ 3,000/mcL
  • Absolute neutrophil count ≥ 1,500/mcL
  • Platelet count ≥ 100,000/mcL
  • Total bilirubin normal
  • AST and ALT ≤ 2.5 times upper limit of normal
  • Creatinine normal OR creatinine clearance ≥ 60 mL/min
  • Not pregnant or nursing
  • Fertile patients must use effective double barrier method of contraception during and for 3 months after completion of study therapy
  • At least 4 weeks since prior chemotherapy (6 weeks for nitrosoureas or mitomycin C) and recovered
  • At least 4 weeks since prior radiotherapy and recovered
  • No concurrent combination antiretroviral therapy for HIV-positive patients
  • No other concurrent investigational agents or anticancer therapy

Exclusion Criteria:

  • History of allergic reactions attributed to compounds of similar chemical or biological composition to obatoclax mesylate or topotecan hydrochloride (e.g., irinotecan)
  • Concurrent uncontrolled illness including, but not limited to, any of the following:

    • Ongoing or active infection
    • Symptomatic congestive heart failure
    • Unstable angina pectoris
    • Cardiac arrhythmia
    • Psychiatric illness or social situations that would limit compliance with study requirements
  • History of seizure disorder or other neurological dysfunction (except peripheral neuropathy)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00521144

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United States, Maryland
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Hospital
Baltimore, Maryland, United States, 21231
United States, New York
Memorial Sloan Kettering Cancer Center
New York, New York, United States, 10065
Sponsors and Collaborators
National Cancer Institute (NCI)
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Principal Investigator: Lee Krug Memorial Sloan Kettering Cancer Center
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: National Cancer Institute (NCI) Identifier: NCT00521144    
Obsolete Identifiers: NCT01645657
Other Study ID Numbers: NCI-2009-00252
07-082 ( Registry Identifier: CTRP (Clinical Trial Reporting Program) )
CDR0000561779 ( Registry Identifier: PDQ (Physician Data Query) )
First Posted: August 27, 2007    Key Record Dates
Results First Posted: July 22, 2014
Last Update Posted: May 5, 2015
Last Verified: December 2013
Additional relevant MeSH terms:
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Lung Neoplasms
Small Cell Lung Carcinoma
Respiratory Tract Neoplasms
Thoracic Neoplasms
Neoplasms by Site
Lung Diseases
Respiratory Tract Diseases
Carcinoma, Bronchogenic
Bronchial Neoplasms
Topoisomerase I Inhibitors
Topoisomerase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents