Study of SS1(dsFv)-PE38 (SS1P) Anti-Mesothelin Immunotoxin in Advanced Malignancies: Continuous Infusion for 10 Days

Although Neopharm has terminated its sponsorship of this study, it is continuing under the sponsorship of the NCI. Please see "Experimental Drug SS1(dsFv)-PE38 to Treat Cancer" (Study ID number 010011).

SS1(dsFv)-PE38 is an oncology drug product containing a bacteria toxin, fused to a high affinity, disulfide stabilized antibody. The fused protein retains cell killing activity, but binds only to cells expressing mesothelin. Tumors characterized by very high surface mesothelin expression include mesothelioma; epithelial carcinomas of ovary and peritoneum; and squamous cancers of cervix and upper aerodigestive tract, including esophagus, head, and neck cancers.

This is a dose-escalating study to determine the maximum tolerated dose (MTD) of intravenous SS1(dsFv)-PE38 administered continuously for 10 days every four weeks for a maximum of four courses of treatment. Dose escalation will proceed in cohorts of 3 until dose-limiting toxicity (DLT) is observed.

Study Overview

• Status: Withdrawn
• Conditions: Neoplasms
• Intervention / Treatment: Drug: SS1(dsFv)-PE38

Detailed Description

OBJECTIVES: I. Investigate the safety and efficacy of SS1(dsFv)-PE38 administered as a 10-day continuous intravenous infusion.

II. Determine the toxicities and maximum tolerated dose (MTD) of SS1(dsFv)-PE38 given by continuous intravenous infusion for ten days in patients with advanced malignancies.

III. Evaluate response of selected advanced malignancies to continuous intravenous infusion of SS1(dsFv)-PE38 for ten days at doses near the MTD.

IV. Characterize the plasma kinetics of SS1(dsFv)-PE38 administered by continuous intravenous infusion.

V. Determine the appearance of serum antibody to SS1(dsFv)-PE38.

PROTOCOL OUTLINE: To exclude immediate allergic hypersensitivity reaction, each patient will receive a test dose of SS1(dsFv)-PE38, and be observed for 30 minutes prior to receiving the continuous infusion on Day 1 of each treatment course. Each treatment will be given by continuous intravenous infusion for ten days. After the first 24 hours of infusion, at the Investigator's discretion, patients will be allowed to leave the hospital on day pass per NCI policies. After the end of infusion patients will be observed overnight. The first patient at each dose level must be observed for development of toxicity for at least 14 days after the beginning of treatment before additional patients are enrolled. At least three patients will be accrued at each dose level. Dose escalation within a patient will not be allowed.

PROJECTED ACCRUAL: Up to 30 patients

• Study Type: Interventional
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Maryland
    • Bethesda, Maryland, United States, 20892
      • NCI/NIH

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

-Disease Characteristics-

Histopathologic diagnosis of one of the following malignancies: malignant mesothelioma; ovarian carcinoma, all non-mucinous epithelial histologies, including primary peritoneal and fallopian tube carcinoma; squamous cell cancer of the lung; squamous cell cancer of the head and neck; or squamous cell cancer of the cervix.

Recurrent unresectable disease after appropriate definitive therapy.

Tumor (initial or recurrent; at least 30% of tumor cells) must be positive (at least 1+) for mesothelin by immunohistochemistry.

No concurrent anti-tumor treatment. At least 4 weeks since any prior anti-tumor therapy, with recovery from side effects, and at least one week since any hematopoetic growth factor therapy.

Measurable or evaluable tumor documented within 4 weeks prior to study entry.

-Patient Characteristics-

At least 18 years of age.

At least 12-week life expectancy.

Performance Status (ECOG) 0-2.

Adequate organ function, including: Absolute neutrophil count at least 1,000/mm3; Platelets at least 75,000/mm3; Creatinine, Calcium, and total Bilirubin less than or equal to the upper limit of normal; Liver enzymes AST and ALT less than or equal to 2.5 x the upper limit of normal; Albumin at least 3.0 g/dL; Oxygen (O2) saturation greater than 92% (room air).

Signed Informed Consent, in accordance with institutional criteria.

No known Central Nervous System (CNS) or spinal cord involvement by tumor.

No detectable antibody to SS1(dsFv)-PE38.

No concurrent antitumor therapy.

No cardiovascular condition NY Heart Association Grade II-IV, or any clinically-significant pericardial effusion.

No infection requiring parenteral antibiotics; no HIV infection; and no seropositivity for Hepatitis B and Hepatitis C.

Not pregnant or nursing. Females of child-bearing potential must use an effective method of contraception.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Collaborators and Investigators

• Sponsor: INSYS Therapeutics Inc

Study record dates

Study Major Dates

• Study Start: February 1, 2001

Study Registration Dates

• First Submitted: September 24, 2001
• First Submitted That Met QC Criteria: September 24, 2001
• First Posted (Estimate): September 25, 2001

Study Record Updates

• Last Update Posted (Estimate): November 14, 2014
• Last Update Submitted That Met QC Criteria: November 13, 2014
• Last Verified: November 1, 2014

More Information

Terms related to this study

• Keywords: advanced malignancy; SS1(dsFv)-PE38; SS1P; anti-mesothelin immunotoxin
• Other Study ID Numbers: SS1PE-001; NCI Study # 01-C-0011