Analyzing adjuvant radiotherapy suggests a non monotonic radio-sensitivity over tumor volumes.

Abstract:

BACKGROUND:Adjuvant Radiotherapy (RT) after surgical removal of tumors proved beneficial in long-term tumor control and treatment planning. For many years, it has been well concluded that radio-sensitivities of tumors upon radiotherapy decrease according to the sizes of tumors and RT models based on Poisson statistics have been used extensively to validate clinical data. RESULTS:We found that Poisson statistics on RT is actually derived from bacterial cells despite of many validations from clinical data. However cancerous cells do have abnormal cellular communications and use chemical messengers to signal both surrounding normal and cancerous cells to develop new blood vessels and to invade, to metastasis and to overcome intercellular spatial confinements in general. We therefore investigated the cell killing effects on adjuvant RT and found that radio-sensitivity is actually not a monotonic function of volume as it was believed before. We present detailed analysis and explanation to justify above statement. Based on EUD, we present an equivalent radio-sensitivity model. CONCLUSION:We conclude that radio sensitivity is a sophisticated function over tumor volumes, since tumor responses upon radio therapy also depend on cellular communications.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Yang JY,Niemierko A,Yang MQ,Deng Y

doi

10.1186/1471-2164-9-S2-S9

subject

Has Abstract

pub_date

2008-09-16 00:00:00

pages

S9

issn

1471-2164

pii

1471-2164-9-S2-S9

journal_volume

9 Suppl 2

pub_type

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