A first in human phase 1 study of CG0070, a GM-CSF expressing oncolytic adenovirus, for the treatment of nonmuscle invasive bladder cancer

J Urol. 2012 Dec;188(6):2391-7. doi: 10.1016/j.juro.2012.07.097. Epub 2012 Oct 22.


Purpose: We assessed the safety, pharmacokinetics and anticancer activity of intravesical CG0070, a cancer selective, replication competent adenovirus, for the treatment of nonmuscle invasive bladder cancer.

Materials and methods: A total of 35 patients received single or multiple (every 28 days × 3 or weekly × 6) intravesical infusions of CG0070 at 1 of 4 dose levels (1 × 10(12), 3 × 10(12), 1 × 10(13) or 3 × 10(13) viral particles). Response to treatment was based on cystoscopic assessment and biopsy or urine cytology. Urine and plasma CG0070, and granulocyte-monocyte colony-stimulating factor were measured in all patients. A subset of 18 patients was assessed for retinoblastoma phosphorylation status.

Results: Grade 1-2 bladder toxicities were the most common adverse events observed. A maximum tolerated dose was not reached. High levels of granulocyte-monocyte colony-stimulating factor were detected in urine after administration in all patients. Virus replication was suggested based on an increase in urine CG0070 genomes between days 2 and 5 in 58.3% of tested patients (7 of 12). The complete response rate and median duration of the complete response across cohorts was 48.6% and 10.4 months, respectively. In the multidose cohorts the complete response rate for the combined groups (every 28 days and weekly × 6) was 63.6% (14 of 22 patients). In an exploratory, retrospective assessment patients with borderline or high retinoblastoma phosphorylation who received the multidose schedules had an 81.8% complete response rate (9 of 11).

Conclusions: Intravesical CG0070 was associated with a tolerable safety profile and antibladder cancer activity. Granulocyte-monocyte colony-stimulating factor transgene expression and CG0070 replication were also suggested.

Publication types

  • Clinical Trial, Phase I

MeSH terms

  • Adenoviruses, Human
  • Administration, Intravesical
  • Adult
  • Aged
  • Cystoscopy / methods
  • Disease-Free Survival
  • Dose-Response Relationship, Drug
  • Drug Administration Schedule
  • Female
  • Follow-Up Studies
  • Granulocyte-Macrophage Colony-Stimulating Factor / metabolism*
  • Granulocyte-Macrophage Colony-Stimulating Factor / urine
  • Humans
  • Immunohistochemistry
  • Kaplan-Meier Estimate
  • Male
  • Maximum Tolerated Dose
  • Middle Aged
  • Neoplasm Invasiveness / pathology
  • Neoplasm Staging
  • Oncolytic Virotherapy / adverse effects
  • Oncolytic Virotherapy / methods*
  • Patient Selection
  • Prospective Studies
  • Survival Analysis
  • Treatment Outcome
  • Urinary Bladder Neoplasms / drug therapy*
  • Urinary Bladder Neoplasms / mortality
  • Urinary Bladder Neoplasms / pathology*
  • Urinary Bladder Neoplasms / urine


  • Granulocyte-Macrophage Colony-Stimulating Factor