Linked Life Data

20473925

Source:http://linkedlifedata.com/resource/pubmed/id/20473925

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2011-1-4
pubmed:abstractText
Pancreatic cancer is an aggressive disease with only limited therapeutic options available. We have identified that 71% pancreatic ductal adenocarcinoma (PDA) express high levels of IL-13R?2, a high-affinity receptor for IL-13. To target IL-13R?2, we have developed a recombinant immunotoxin, which is a fusion of IL-13 and Pseudomonas exotoxin (IL-13-PE). Since IL-13-PE and a commonly used cytotoxic drug gemcitabine act by a different mechanism, we hypothesized that they synergize in mediating antitumor response. Both IL-13-PE and gemcitabine-mediated cytotoxicity to two pancreatic cancer cell lines and when combined synergistic cytotoxicity was observed. This synergism was also demonstrated in vivo in an orthotopic mouse model of human PDA. IL-13-PE and gemcitabine showed complete eradiation of tumors as assessed by whole body imaging of GFP-transfected tumors in 57% of mice in an early cancer model resulting into prolongation of survival. In contrast, monotherapy with either agent did not produce complete eradiation, but tumor volumes were significantly decreased. In advanced PDA model, combination therapy also produced dramatic reduction in tumor growth and enhanced survival compared to animals treated with either agent alone. When IL-13R?2 was knocked-down by RNAi prior to tumor implantation, IL-13-PE and gemcitabine did not synergize indicating that IL-13R?2 is essential. Mechanistically, gemcitabine increased IL-13R?2 expression in vitro and in vivo, which resulted in a synergism of combination therapy. Interestingly, PDA cancer stem cells were resistant to gemcitabine, but not to IL-13-PE. These results suggest that combination therapy with IL-13-PE and gemcitabine may be a useful strategy for PDA therapy.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1097-0215
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 UICC.
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
128
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1221-31
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Targeting IL-13R?2 in human pancreatic ductal adenocarcinoma with combination therapy of IL-13-PE and gemcitabine.
pubmed:affiliation
Tumor Vaccines and Biotechnology Branch, Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, US Food and Drug Administration, Bethesda, MD, USA.
pubmed:publicationType
Journal Article