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Title:Cryosurgery combined with radiotherapy of tumors in mice
Authors:ID Fras, Albert-Peter (Author)
ID Kranjc Brezar, Simona (Author)
ID Čemažar, Maja (Author)
ID Serša, Gregor (Author)
Files:.pdf PDF - Presentation file, download (311,91 KB)
MD5: A41DFC91E2F6196E142084DE332CA1C1
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo OI - Institute of Oncology
Abstract:Tlle aim of this study zuas to determine antitumor effectiveness of cryosurgery alone and in comhination with radiotherapy. Cryosurgery of subcutaneous fibrosarcoma SA-1 tumors in A/J mice was moderately effective trcatmcnt. Tumor growth delay was 10.3 * 3.8 days after 5 minute treatment with nitrogen filled cryo-prohe. Shorter treatment times induced less, but dose dependent antitumor effect. In combined treat- ment, tumors were either first treated by cryosurgery for 3 minutes and then locally irradiated with 10Gy for 5 minutes, or irradiated first and thereafter treated by cryosurgery.The antitumor effectiveness of com- bined treatrnent was sequence dependent; the irradiation of tumors before cryosurgery resulted in better antitumor effect than the irradiation after cryosurgery. These results indicate that radiosensitization may not be always expected, in spite of some reports demonstrating that cryosurgery may have radiosensitizing effect in vivo, and that some other mechanisms may be involved contributing to radiationdamage when cryosurgery follows irradiation.
Publication status:Published
Publication version:Version of Record
Publication date:01.01.1999
Publisher:Slovenian Medical Association - Slovenian Association of Radiology, Nuclear Medicine Society, Slovenian Society far Radiotherapy and Oncology, and Slovenian Cancer Society
Year of publishing:1999
Number of pages:str. 221-225
Numbering:Letn. 33, št. 3
Source:Ljubljana
PID:20.500.12556/DiRROS-17920 New window
UDC:616-006
ISSN on article:1318-2099
COBISS.SI-ID:10783961 New window
Copyright:by Authors
Note:BSDOCID46575;
Publication date in DiRROS:22.01.2024
Views:532
Downloads:137
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Record is a part of a journal

Title:Radiology and oncology
Shortened title:Radiol. oncol.
Publisher:Slovenian Medical Society - Section of Radiology, Croatian Medical Association - Croatian Society of Radiology
ISSN:1318-2099
COBISS.SI-ID:32649472 New window

Secondary language

Language:Slovenian
Title:Kriokirurgija mišjih tumorjev SA-1 v kombinaciji z obsevanjem
Abstract:Namen naše raziskave je bil določiti protitumorsko delovanje kriokirurgije kotsamostojne terapije in v kombinaciji z obsevanjem. Kriokirurgija podkožnih fibrosarkomskih tumorjev SA-1, ki smo jih nasadili v A/J miši, je bila učinkovita terapija. Zaostanek v rasti tumorjev po 5 minutnem zamrzovanju s tekočim dušikom je bil 10.3+- 3.8 dni. Časovno krajše zamrzovanje je bilo manjučinkovito, a odvisno od časa zamrzovanja. Pri kombinirani terapiji smo tumorje najprej zamrzovali 3 minute in jih po 5 minutah obsevali z 10 Gy, oziroma najprej obsevali in jih po 5 minutah zamrzovali. Protitumorsko delovanje je bilo odvisno od vrstnega reda kombinirane terapije, tumorji ki smo jih obsevali pred zamrzovanjem so rastli počasneje, kot tisti, ki smo jih obsevali po zmrzovanju. Kljub temu, da nekatere študije poročajo o povečani občutljivosti celic na obsevanje po kriokirurgiji, so naši rezultati pokazali,da te občutljivosti na sevanje in vivo ne moremo vedno pričakovati, ter da so v protitumorsko delovanje kombinirane terapije verjetno vpleteni tudi drugi mehanizmi, ki prispevajo k poškodbam zaradi obsevanja, če le-temu sledi kriokirurgija.


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