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Convection-enhanced delivery of free gadolinium with the recombinant immunotoxin MR1-1.

Publication ,  Journal Article
Ding, D; Kanaly, CW; Bigner, DD; Cummings, TJ; Herndon, JE; Pastan, I; Raghavan, R; Sampson, JH
Published in: J Neurooncol
May 2010

A major obstacle in glioblastoma (GBM) therapy is the restrictive nature of the blood-brain barrier (BBB). Convection-enhanced delivery (CED) is a novel method of drug administration which allows direct parenchymal infusion of therapeutics, bypassing the BBB. MR1-1 is a novel recombinant immunotoxin that targets the GBM tumor-specific antigen EGFRvIII and can be delivered via CED infusion. However, drug distribution via CED varies dramatically, which necessitates active monitoring. Gadolinium conjugated to diethylenetriamine penta-acetic acid (Gd-DTPA) is a commonly used MRI contrast agent which can be co-infused with therapies using CED and may be useful in monitoring infusion leak and early distribution. Forty immunocompetent rats were implanted with intracerebral cannulas that were connected to osmotic pumps and subsequently randomized into four groups that each received 0.2% human serum albumin (HSA) mixed with a different experimental infusion: (1) 25 ng/ml MR1-1; (2) 0.1 micromol/ml Gd-DTPA; (3) 25 ng/ml MR1-1 and 0.1 micromol/ml Gd-DTPA; (4) 250 ng/ml MR1-1 and 0.1 micromol/ml Gd-DTPA. The rats were monitored clinically for 6 weeks then necropsied and histologically assessed for CNS toxicity. All rats survived the entirety of the study without clinical or histological toxicity attributable to the study drugs. There was no statistically significant difference in weight change over time among groups (P > 0.999). MR1-1 co-infused with Gd-DTPA via CED is safe in the long-term setting in a pre-clinical animal model. Our data supports the use of Gd-DTPA, as a surrogate tracer, co-infused with MR1-1 for drug distribution monitoring in patients with GBM.

Duke Scholars

Published In

J Neurooncol

DOI

EISSN

1573-7373

Publication Date

May 2010

Volume

98

Issue

1

Start / End Page

1 / 7

Location

United States

Related Subject Headings

  • Tissue Distribution
  • Rats, Inbred F344
  • Rats
  • Protein Precursors
  • Oncology & Carcinogenesis
  • Magnetic Resonance Imaging
  • Immunotoxins
  • Immunocompetence
  • Gadolinium DTPA
  • Epidermal Growth Factor
 

Citation

APA
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MLA
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Ding, D., Kanaly, C. W., Bigner, D. D., Cummings, T. J., Herndon, J. E., Pastan, I., … Sampson, J. H. (2010). Convection-enhanced delivery of free gadolinium with the recombinant immunotoxin MR1-1. J Neurooncol, 98(1), 1–7. https://doi.org/10.1007/s11060-009-0046-7
Ding, Dale, Charles W. Kanaly, Darrell D. Bigner, Thomas J. Cummings, James E. Herndon, Ira Pastan, Raghu Raghavan, and John H. Sampson. “Convection-enhanced delivery of free gadolinium with the recombinant immunotoxin MR1-1.J Neurooncol 98, no. 1 (May 2010): 1–7. https://doi.org/10.1007/s11060-009-0046-7.
Ding D, Kanaly CW, Bigner DD, Cummings TJ, Herndon JE, Pastan I, et al. Convection-enhanced delivery of free gadolinium with the recombinant immunotoxin MR1-1. J Neurooncol. 2010 May;98(1):1–7.
Ding, Dale, et al. “Convection-enhanced delivery of free gadolinium with the recombinant immunotoxin MR1-1.J Neurooncol, vol. 98, no. 1, May 2010, pp. 1–7. Pubmed, doi:10.1007/s11060-009-0046-7.
Ding D, Kanaly CW, Bigner DD, Cummings TJ, Herndon JE, Pastan I, Raghavan R, Sampson JH. Convection-enhanced delivery of free gadolinium with the recombinant immunotoxin MR1-1. J Neurooncol. 2010 May;98(1):1–7.
Journal cover image

Published In

J Neurooncol

DOI

EISSN

1573-7373

Publication Date

May 2010

Volume

98

Issue

1

Start / End Page

1 / 7

Location

United States

Related Subject Headings

  • Tissue Distribution
  • Rats, Inbred F344
  • Rats
  • Protein Precursors
  • Oncology & Carcinogenesis
  • Magnetic Resonance Imaging
  • Immunotoxins
  • Immunocompetence
  • Gadolinium DTPA
  • Epidermal Growth Factor