Abstract
Vaccination with tumor extracts circumvents the need to identify specific tumor rejection antigens and extends the use of active immunotherapy to the vast majority of cancers, in which specific tumor antigens have not yet been identified. In this study we examined the efficacy of tumor vaccines comprised of unfractionated tumor material presented by professional antigen-presenting cells (APC): dendritic cells (DC) or macrophages (M∅). To enhance the relevance of these studies for human patients we used 2 poorly immunogenic murine tumor models and evaluated the effectiveness of the vaccination protocols in tumor-bearing animals. APC (in particular DC) pulsed with unfractionated extracts from these 'poorly immunogenic' tumors were highly effective in eliciting tumor-specific cytotoxic T lymphocytes. A measurable CTL response could be detected after even a single immunization with tumor extract-pulsed DC. DC or M∅ pulsed with tumor extract were also effective vaccines in tumor-bearing animals. In the murine bladder tumor (MBT-2) model a modest extension of survival and 40% cure rate was seen in the animal groups immunized with DC or M∅ pulsed with MBT-2 tumor extract. DC or M∅ pulsed with B 16/F10.9 tumor extract were also remarkably effective in the B 16 melanoma lung metastasis model, as shown by the observation that treatment with APC caused a significant reduction in lung metastases. Cumulatively, the CTL and immunotherapy data from the two murine tumor systems suggest that APC (in particular DC) pulsed with unfractionated cell extracts as a source of tumor antigen may be equally or more effective than genetically modified tumor vaccines.
| Original language | English |
|---|---|
| Pages (from-to) | 706-715 |
| Number of pages | 10 |
| Journal | International Journal of Cancer |
| Volume | 70 |
| Issue number | 6 |
| DOIs | |
| State | Published - Apr 23 1997 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Cancer Research
- Oncology
Cite this
Regression of tumors in mice vaccinated with professional antigen-presenting cells pulsed with tumor extracts. / Nair, Smita K.; Snyder, David; Rouse, Barry T.; Gilboa, Eli.
In: International Journal of Cancer, Vol. 70, No. 6, 23.04.1997, p. 706-715.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Regression of tumors in mice vaccinated with professional antigen-presenting cells pulsed with tumor extracts
AU - Nair, Smita K.
AU - Snyder, David
AU - Rouse, Barry T.
AU - Gilboa, Eli
PY - 1997/4/23
Y1 - 1997/4/23
N2 - Vaccination with tumor extracts circumvents the need to identify specific tumor rejection antigens and extends the use of active immunotherapy to the vast majority of cancers, in which specific tumor antigens have not yet been identified. In this study we examined the efficacy of tumor vaccines comprised of unfractionated tumor material presented by professional antigen-presenting cells (APC): dendritic cells (DC) or macrophages (M∅). To enhance the relevance of these studies for human patients we used 2 poorly immunogenic murine tumor models and evaluated the effectiveness of the vaccination protocols in tumor-bearing animals. APC (in particular DC) pulsed with unfractionated extracts from these 'poorly immunogenic' tumors were highly effective in eliciting tumor-specific cytotoxic T lymphocytes. A measurable CTL response could be detected after even a single immunization with tumor extract-pulsed DC. DC or M∅ pulsed with tumor extract were also effective vaccines in tumor-bearing animals. In the murine bladder tumor (MBT-2) model a modest extension of survival and 40% cure rate was seen in the animal groups immunized with DC or M∅ pulsed with MBT-2 tumor extract. DC or M∅ pulsed with B 16/F10.9 tumor extract were also remarkably effective in the B 16 melanoma lung metastasis model, as shown by the observation that treatment with APC caused a significant reduction in lung metastases. Cumulatively, the CTL and immunotherapy data from the two murine tumor systems suggest that APC (in particular DC) pulsed with unfractionated cell extracts as a source of tumor antigen may be equally or more effective than genetically modified tumor vaccines.
AB - Vaccination with tumor extracts circumvents the need to identify specific tumor rejection antigens and extends the use of active immunotherapy to the vast majority of cancers, in which specific tumor antigens have not yet been identified. In this study we examined the efficacy of tumor vaccines comprised of unfractionated tumor material presented by professional antigen-presenting cells (APC): dendritic cells (DC) or macrophages (M∅). To enhance the relevance of these studies for human patients we used 2 poorly immunogenic murine tumor models and evaluated the effectiveness of the vaccination protocols in tumor-bearing animals. APC (in particular DC) pulsed with unfractionated extracts from these 'poorly immunogenic' tumors were highly effective in eliciting tumor-specific cytotoxic T lymphocytes. A measurable CTL response could be detected after even a single immunization with tumor extract-pulsed DC. DC or M∅ pulsed with tumor extract were also effective vaccines in tumor-bearing animals. In the murine bladder tumor (MBT-2) model a modest extension of survival and 40% cure rate was seen in the animal groups immunized with DC or M∅ pulsed with MBT-2 tumor extract. DC or M∅ pulsed with B 16/F10.9 tumor extract were also remarkably effective in the B 16 melanoma lung metastasis model, as shown by the observation that treatment with APC caused a significant reduction in lung metastases. Cumulatively, the CTL and immunotherapy data from the two murine tumor systems suggest that APC (in particular DC) pulsed with unfractionated cell extracts as a source of tumor antigen may be equally or more effective than genetically modified tumor vaccines.
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UR - http://www.scopus.com/inward/citedby.url?scp=0030966684&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1097-0215(19970317)70:6<706::AID-IJC13>3.0.CO;2-7
DO - 10.1002/(SICI)1097-0215(19970317)70:6<706::AID-IJC13>3.0.CO;2-7
M3 - Article
C2 - 9096653
AN - SCOPUS:0030966684
VL - 70
SP - 706
EP - 715
JO - International Journal of Cancer
JF - International Journal of Cancer
SN - 0020-7136
IS - 6
ER -