PMID- 11606390 OWN - NLM STAT- MEDLINE DCOM- 20011204 LR - 20131121 IS - 0008-5472 (Print) IS - 0008-5472 (Linking) VI - 61 IP - 20 DP - 2001 Oct 15 TI - Combined intratumoral injection of bone marrow-derived dendritic cells and systemic chemotherapy to treat pre-existing murine tumors. PG - 7530-5 AB - Dendritic cells (DCs) are attractive candidates for innovative cancer immunotherapy by virtue of their potential to function as professional antigen-presenting cells for initiating cellular immune responses. In this study, we evaluated a possible synergy of conventional chemotherapy together with intratumoral injection of syngeneic bone marrow-derived DCs for the treatment of preexisting tumors. Using murine CT26 colon adenocarcinoma cells (parental or modified to express beta-galactosidase as a model tumor antigen) to produce s.c. tumors in syngeneic BALB/c mice, the data demonstrate that direct injections of DCs at the tumor site result in partial eradication of established tumors. Strikingly, the addition of systemic chemotherapy (cyclophosphamide) combined with local intratumoral injection of DCs led to complete tumor regression in the treated animals. The tumor-free mice were able to resist a repeat challenge with the same tumor, suggesting that the animals had acquired long term antitumor immunity. Supporting evidence for the paradigm of systemic chemotherapy and intratumoral administration of DCs was obtained using melanoma B16 syngeneic tumor treated with Adriamycin plus DCs. These novel findings raise the possibility of using this potent strategy of combined intratumoral injections of DCs and systemic chemotherapy for cancer treatment. FAU - Tong, Y AU - Tong Y AD - Division of Pulmonary and Critical Care Medicine, Weill Medical College of Cornell University, New York, New York 10021, USA. FAU - Song, W AU - Song W FAU - Crystal, R G AU - Crystal RG LA - eng GR - R01 CA75192/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Cancer Res JT - Cancer research JID - 2984705R RN - 0 (Antineoplastic Agents) RN - 80168379AG (Doxorubicin) RN - 8N3DW7272P (Cyclophosphamide) SB - IM MH - Animals MH - Antineoplastic Agents/*pharmacology MH - Bone Marrow Cells/cytology/immunology MH - Combined Modality Therapy MH - Cyclophosphamide/*pharmacology MH - Dendritic Cells/*immunology MH - Doxorubicin/*pharmacology MH - Female MH - Immunologic Memory MH - Immunotherapy, Adoptive/*methods MH - Injections, Intralesional MH - Mice MH - Neoplasm Transplantation MH - Neoplasms, Experimental/drug therapy/immunology/*therapy MH - T-Lymphocytes, Cytotoxic/immunology EDAT- 2001/10/19 10:00 MHDA- 2002/01/05 10:01 CRDT- 2001/10/19 10:00 PHST- 2001/10/19 10:00 [pubmed] PHST- 2002/01/05 10:01 [medline] PHST- 2001/10/19 10:00 [entrez] PST - ppublish SO - Cancer Res. 2001 Oct 15;61(20):7530-5.