Abstract
Purpose: The enhancing effect of natural interferon-β (n-IFN-β) or recombinant interferon-β (r-IFN-β) on radiation damage in tumor cells has been evaluated in several studies. It is not clear whether the different forms of IFN-β available today are equally efficient in modulating the intrinsic radiosensitivity of tumor cells. The purpose of this study was to compare the radiosensitizing effect of n-IFN-β, r-IFN-β1a, and r-IFN-β1b in one cancer cell line. Methods: The A549 lung-cancer cell line was grown as a monolayer culture and incubated for 24 h with n-IFN-β (Fiblaferon), r- IFN-β1a (Betaserin), or r-IFN-β1b (Betaferon). Thereafter, the cultures were irradiated with single graded doses of 0, 1, 2, 4, and 6 Gy. Cellular survival was counted in a colony-forming assay at 10 days after treatment. Survival curves were established using the linear quadratic model. Statistical comparison of the survival data was performed using Student's t- test for each dose point. Interactions of IFN-β and radiation were evaluated using isobologram analysis. Results: All three types of IFN-β enhanced the radiation sensitivity of A549 cells in a similar way as shown in the alteration of the survival curves and the isobologram analysis. The isoeffective concentration of r-IFN-β1b was 2.7-fold higher than that of r- IFN-β1a or n-IFN-β. All three interferons increased the α-component of the survival curves in a concentration-dependent way, suggesting an influence on repair of radiation damage. The maximal sensitizing enhancement ratio (SER) obtained with n-IFN-β or r-IFN-β1a at 3000 IU/ml was 1.66 and 1.51, respectively. The highest SER, obtained with r-IFN-β1b, at 8000 IU/ml was 1.93. Conclusions: All three interferons tested can equally modify the intrinsic radiosensitivity of A549 cells. The isoeffective concentration of r-IFN-β1b is 2.7-fold that of n-IFN-β or r-IFN-β1a.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 350-356 |
| Number of pages | 7 |
| Journal | Journal of Cancer Research and Clinical Oncology |
| Volume | 125 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1999 |
| Externally published | Yes |
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Keywords
- Cytokines
- Interferon
- Lung cancer
- Radiosensitization
- Recombinant beta-interferon Radiation
ASJC Scopus subject areas
- Cancer Research
- Oncology
Cite this
Radiosensitizing effect of natural and recombinant β-interferons in a human lung carcinoma in vitro. / Schmidberger, Heinz; Rave-Fränk, Margret; Lehmann, Jörg; Schweinfurth, Simone; Pradier, Olivier; Hess, Clemens F.
In: Journal of Cancer Research and Clinical Oncology, Vol. 125, No. 6, 1999, p. 350-356.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Radiosensitizing effect of natural and recombinant β-interferons in a human lung carcinoma in vitro
AU - Schmidberger, Heinz
AU - Rave-Fränk, Margret
AU - Lehmann, Jörg
AU - Schweinfurth, Simone
AU - Pradier, Olivier
AU - Hess, Clemens F.
PY - 1999
Y1 - 1999
N2 - Purpose: The enhancing effect of natural interferon-β (n-IFN-β) or recombinant interferon-β (r-IFN-β) on radiation damage in tumor cells has been evaluated in several studies. It is not clear whether the different forms of IFN-β available today are equally efficient in modulating the intrinsic radiosensitivity of tumor cells. The purpose of this study was to compare the radiosensitizing effect of n-IFN-β, r-IFN-β1a, and r-IFN-β1b in one cancer cell line. Methods: The A549 lung-cancer cell line was grown as a monolayer culture and incubated for 24 h with n-IFN-β (Fiblaferon), r- IFN-β1a (Betaserin), or r-IFN-β1b (Betaferon). Thereafter, the cultures were irradiated with single graded doses of 0, 1, 2, 4, and 6 Gy. Cellular survival was counted in a colony-forming assay at 10 days after treatment. Survival curves were established using the linear quadratic model. Statistical comparison of the survival data was performed using Student's t- test for each dose point. Interactions of IFN-β and radiation were evaluated using isobologram analysis. Results: All three types of IFN-β enhanced the radiation sensitivity of A549 cells in a similar way as shown in the alteration of the survival curves and the isobologram analysis. The isoeffective concentration of r-IFN-β1b was 2.7-fold higher than that of r- IFN-β1a or n-IFN-β. All three interferons increased the α-component of the survival curves in a concentration-dependent way, suggesting an influence on repair of radiation damage. The maximal sensitizing enhancement ratio (SER) obtained with n-IFN-β or r-IFN-β1a at 3000 IU/ml was 1.66 and 1.51, respectively. The highest SER, obtained with r-IFN-β1b, at 8000 IU/ml was 1.93. Conclusions: All three interferons tested can equally modify the intrinsic radiosensitivity of A549 cells. The isoeffective concentration of r-IFN-β1b is 2.7-fold that of n-IFN-β or r-IFN-β1a.
AB - Purpose: The enhancing effect of natural interferon-β (n-IFN-β) or recombinant interferon-β (r-IFN-β) on radiation damage in tumor cells has been evaluated in several studies. It is not clear whether the different forms of IFN-β available today are equally efficient in modulating the intrinsic radiosensitivity of tumor cells. The purpose of this study was to compare the radiosensitizing effect of n-IFN-β, r-IFN-β1a, and r-IFN-β1b in one cancer cell line. Methods: The A549 lung-cancer cell line was grown as a monolayer culture and incubated for 24 h with n-IFN-β (Fiblaferon), r- IFN-β1a (Betaserin), or r-IFN-β1b (Betaferon). Thereafter, the cultures were irradiated with single graded doses of 0, 1, 2, 4, and 6 Gy. Cellular survival was counted in a colony-forming assay at 10 days after treatment. Survival curves were established using the linear quadratic model. Statistical comparison of the survival data was performed using Student's t- test for each dose point. Interactions of IFN-β and radiation were evaluated using isobologram analysis. Results: All three types of IFN-β enhanced the radiation sensitivity of A549 cells in a similar way as shown in the alteration of the survival curves and the isobologram analysis. The isoeffective concentration of r-IFN-β1b was 2.7-fold higher than that of r- IFN-β1a or n-IFN-β. All three interferons increased the α-component of the survival curves in a concentration-dependent way, suggesting an influence on repair of radiation damage. The maximal sensitizing enhancement ratio (SER) obtained with n-IFN-β or r-IFN-β1a at 3000 IU/ml was 1.66 and 1.51, respectively. The highest SER, obtained with r-IFN-β1b, at 8000 IU/ml was 1.93. Conclusions: All three interferons tested can equally modify the intrinsic radiosensitivity of A549 cells. The isoeffective concentration of r-IFN-β1b is 2.7-fold that of n-IFN-β or r-IFN-β1a.
KW - Cytokines
KW - Interferon
KW - Lung cancer
KW - Radiosensitization
KW - Recombinant beta-interferon Radiation
UR - http://www.scopus.com/inward/record.url?scp=0033010156&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033010156&partnerID=8YFLogxK
U2 - 10.1007/s004320050285
DO - 10.1007/s004320050285
M3 - Article
C2 - 10363567
AN - SCOPUS:0033010156
VL - 125
SP - 350
EP - 356
JO - Journal of Cancer Research and Clinical Oncology
JF - Journal of Cancer Research and Clinical Oncology
SN - 0171-5216
IS - 6
ER -