High-dose irradiation of bone chips preserves the in vitro activity of bone-conditioned medium.

Abstract:

:Extracorporeal irradiation sterilizes resected tumor bone used as autografts in reconstruction surgery. Therapeutic irradiation is a standard technique in head and neck cancer therapy that aims to preserve organ function. Bone irradiation has a complex, mostly inhibitory, effect on remodeling and regeneration, although the underlying mechanisms are still not fully understood. It remains unclear if extracorporeal irradiation affects the paracrine-like activity of the corresponding autografts. We recently reported that bone-conditioned medium from autogenous bone chips contains a number of factors that might affect cell activity. In the present study, we investigated the effects of extracorporeal irradiation of porcine cortical bone chips on the activity of the corresponding bone-conditioned medium. The effects of bone-conditioned medium on the expressions of transforming growth factor-beta (TGF-β) target genes in oral fibroblasts were assessed. Bone-conditioned medium from bone chips exposed to a total radiation dose up to 120 Gy did not affect expressions of TGF-β target genes, including adrenomedullin, BTB/POZ domain-containing protein 11, proteoglycan 4, NADPH oxidase 4, and interleukin 11, in oral fibroblasts. In conclusion, bone irradiation does not alter the capability of the corresponding bone-conditioned medium to provoke a robust fibroblastic cell response in vitro. (J Oral Sci 58, 325-331, 2016).

journal_name

J Oral Sci

journal_title

Journal of oral science

authors

Sawada K,Miron RJ,Leiser D,Caballé-Serrano J,Bosshardt DD,Schaller B,Buser D,Gruber R

doi

10.2334/josnusd.16-0042

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

325-31

issue

3

eissn

1343-4934

issn

1880-4926

journal_volume

58

pub_type

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