Promising abscopal effect of combination therapy with thermal tumour ablation and intratumoural OK-432 injection in the rat osteosarcoma model

Treatment options for metastatic osteosarcoma are limited. The present study aimed to evaluate whether radiofrequency ablation (RFA) combined with intratumoural OK-432 injection induces systemic anti-tumour immunity in rat osteosarcoma model. Eighty of 145 rats were assigned to four groups to evaluate overall survival and tumour size: control (no treatment), RFA-only, OK-432, and RFA-OK-432. The remaining 65 were assigned for histological examination. Maximum diameters of tibial and lung tumours were determined. Tumour samples were histologically examined using haematoxylin-eosin and immunohistochemical staining. Overall survival was significantly prolonged in the RFA-OK-432 group compared to the RFA-only and OK-432 groups. Only rats in the RFA-OK-432 group exhibited significant decreases in maximum tumour diameter after treatment. Ki-67-positive tumour cells in the RFA-OK-432 group were significantly stained negative on immunohistochemical analysis as opposed to those in the RFA-only and OK-432 groups. The number of CD11c+, OX-62+, CD4+, and CD8 + cells significantly increased in the RFA-OK-432 group compared to the RFA-only group. RFA with intratumoural OK-432 injection resulted in distant tumour suppression, prolonged survival, and increased dendritic cells, cytotoxic T cells, IFN-γ, and TNF-α, whereas RFA or OK-432 alone did not produce this effect. This combination may induce an abscopal effect in human osteosarcoma.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:10

Enthalten in:

Scientific reports - 10(2020), 1 vom: 15. Juni, Seite 9679

Sprache:

Englisch

Beteiligte Personen:

Iwai, Tadashi [VerfasserIn]
Oebisu, Naoto [VerfasserIn]
Hoshi, Manabu [VerfasserIn]
Orita, Kumi [VerfasserIn]
Yamamoto, Akira [VerfasserIn]
Hamamoto, Shinichi [VerfasserIn]
Kageyama, Ken [VerfasserIn]
Nakamura, Hiroaki [VerfasserIn]

Links:

Volltext

Themen:

39325-01-4
Antineoplastic Agents
Journal Article
Picibanil

Anmerkungen:

Date Completed 09.12.2020

Date Revised 15.06.2021

published: Electronic

Citation Status MEDLINE

doi:

10.1038/s41598-020-66934-6

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM311209548