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Annals of Surgical Oncology

, Volume 23, Issue 12, pp 4110–4114 | Cite as

Phase 1b Trial to Evaluate Tissue Response to a Second Dose of Intravesical Recombinant Adenoviral Interferon α2b Formulated in Syn3 for Failures of Bacillus Calmette–Guerin (BCG) Therapy in Nonmuscle Invasive Bladder Cancer

  • Neema Navai
  • William F. Benedict
  • Guangcheng Zhang
  • Alice Abraham
  • Nancy Ainslie
  • Jay B. Shah
  • H. Barton Grossman
  • Ashish M. Kamat
  • Colin P. N. Dinney
Urologic Oncology

Abstract

Background

A phase 1b trial was conducted to evaluate the duration of interferon-alpha (IFNα) production after intravesical administration of recombinant adenovirus-mediated interferon α2b (Ad-IFN) formulated with the excipient Syn3. The primary aim was to determine whether a second instillation 3 days after initial treatment produced prolonged urinary IFN production.

Methods

The study enrolled seven patients who experienced recurrent non-muscle invasive bladder cancer after bacillus Calmette–Guerin therapy. Each treatment consisted of intravesical instillation of SCH721015 (Syn3) and Ad-IFN at a concentration of 3 × 1011 particles/mL to a total volume of 75 mL given on days 1 and 4. The patients were followed for 12 weeks, during which the magnitude and duration of gene transfer were determined by urine INFα levels. Drug efficacy was determined by cystoscopy and biopsy, and patients who had no recurrence at 12 weeks were eligible for a second course of treatment.

Results

Seven patients were treated with an initial course (instillation on days 1 and 4). Two of the patients had a complete response at 12 weeks and received a second course of treatment. One patient remained without evidence of recurrence after a second course (total 24 weeks). One patient experienced a non-treatment-associated adverse event. Despite a transient rise in IFNα levels, sustained production was not demonstrated.

Conclusion

Previously, Ad-IFNα intravesical therapy has shown promising drug efficacy. A prior phase 1 trial with a single instillation compared similarly with the current study, suggesting that a second instillation is not necessary to achieve sufficient urinary IFNα levels.

Keywords

Radical Cystectomy MIBC Intravesical Therapy Intravesical Chemotherapy Orthotopic Mouse Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Supported in part by the National Cancer Institute of the National Institutes of Health under the following awards: The Cancer Center Support Grant P30CA016672, the MD Anderson Cancer Center SPORE in Genitourinary Cancer P50CA091846, and the Career Development Program of the MD Anderson SPORE in Genitourinary Cancer P50 CA091846. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

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Copyright information

© Society of Surgical Oncology 2016

Authors and Affiliations

  • Neema Navai
    • 1
  • William F. Benedict
    • 2
  • Guangcheng Zhang
    • 2
  • Alice Abraham
    • 1
  • Nancy Ainslie
    • 1
  • Jay B. Shah
    • 1
  • H. Barton Grossman
    • 1
  • Ashish M. Kamat
    • 1
  • Colin P. N. Dinney
    • 1
    • 3
  1. 1.Department of UrologyThe University of Texas MD Anderson Cancer CenterHoustonUSA
  2. 2.Department of Genitourinary Medical OncologyThe University of Texas MD Anderson Cancer CenterHoustonUSA
  3. 3.1515 Holcombe Boulevard Unit 1373HoustonUSA

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