Anti-tumour effect of an aromatic retinoic acid analog in a mouse syngeneic transplantable sarcoma.

Anti-tumour activity of an aromatic retinoic acid analog has been tested on Sarcoma J in syngeneic system. Tumour complete regression rate and median survival time of progressors mice are significantly improved. These results are at variance with previous observations suggesting the lack of activity of this compound on transplanted murine tumours. Arguments in favour of an immunological stimulation responsible for the observed anti-tumour effect are presented and discussed.