Abstract:
BACKGROUND AIMS:Dendritic cell (DC)-based therapies could be important strategies for lymphoma treatment. METHODS:AKR/J mice with Dalton's lymphoma were treated with recombinant interleukin-15 (rIL-15)-activated autologous DCs and pulsed with whole tumor cell lysates in the presence or absence of suboptimal doses of the STAT3 inhibitor cucurbitacin I. One group of treated mice received an additional dose of rIL-15 to boost the DC-based adoptive cell therapy (ACT). Kaplan-Meier survival analysis and multiple immunologic and enzymatic parameters were assessed to demonstrate the efficacy of the vaccination protocol. RESULTS:Therapy with tumor lysate-pulsed, rIL-15-activated DCs plus cucurbitacin I significantly prolongs the survival of tumor-bearing mice but fails to provide a complete cure. Additional treatment of vaccinated mice with rIL-15 dramatically improves the therapeutic efficacy and provides a lifelong cure with no relapse. DCs derived from the surviving vaccinated mice regained their anti-tumor potential against the lymphoma cells with respect to growth inhibition and cytotoxicity. Both cluster of differentiation (CD)4(+) and CD8(+) T cells were mobilized in metastatic organs of successfully vaccinated mice in large numbers and demonstrated antigen-specific proliferation and tumor cell cytotoxicity. ACT also augments DC function by upregulating tumor necrosis factor-related apoptosis-inducing ligand and tumor necrosis factor-α expression. In addition, combinatorial immunotherapy restores the levels of antioxidant enzymes and liver function enzyme activities that are severely repressed in untreated tumor-bearing mice. CONCLUSIONS:Effective vaccination for a complete cure against aggressive lymphoma requires DC-based ACT in combination with chemotherapy and cytokine therapy.
journal_name
Cytotherapyjournal_title
Cytotherapyauthors
Hira SK,Mondal I,Manna PPdoi
10.1016/j.jcyt.2015.01.006subject
Has Abstractpub_date
2015-05-01 00:00:00pages
647-64issue
5eissn
1465-3249issn
1477-2566pii
S1465-3249(15)00046-8journal_volume
17pub_type
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