Interaction between endotoxin and the antitumour agent 5,6-dimethylxanthenone-4-acetic acid in the induction of tumour necrosis factor and haemorrhagic necrosis of colon 38 tumours - PubMed (original) (raw)

Comparative Study

doi: 10.1007/BF00686639.

Affiliations

Comparative Study

Interaction between endotoxin and the antitumour agent 5,6-dimethylxanthenone-4-acetic acid in the induction of tumour necrosis factor and haemorrhagic necrosis of colon 38 tumours

L M Ching et al. Cancer Chemother Pharmacol. 1994.

Abstract

The investigational antitumour agent 5,6-dimethyl-xanthenone-4-acetic acid (5,6-MeXAA) induced dose-dependent haemorrhagic necrosis of colon 38 tumours to a similar extent to that induced using bacterial lipopolysaccharide (LPS). TNF-alpha activity in serum and mRNA for TNF-alpha in splenocytes were induced over a broad range of LPS doses, whereas with 5,6-MeXAA, induction occurred only at concentrations approaching the maximum tolerated dose. At concentrations that provided similar degrees of haemorrhagic necrosis, the levels of serum TNF-alpha induced using 5,6-MeXAA were 100-fold lower than those obtained with LPS, indicating that haemorrhagic necrosis was not directly correlated with TNF-alpha levels. There was also no correlation between the degree of tumour necrosis and the duration of growth delay. Treatment with LPS did not induce a significant delay in growth, despite extensive tumour haemorrhagic necrosis, whereas with 5,6-MeXAA, treatments that improved the cure rate did not necessarily give longer growth delays. Therapy using a combination of sub-optimal doses of both compounds was synergistic for the induction of serum TNF-alpha and message for TNF-alpha but was not synergistic for antitumour efficacy. Thus, no correlation is evident between cure rates, duration of growth delay, haemorrhagic necrosis and TNF-alpha induction by 5,6-MeXAA or LPS.

PubMed Disclaimer

Similar articles

Cited by

References

    1. J Natl Cancer Inst. 1988 Oct 5;80(15):1226-31 - PubMed
    1. Eur J Cancer. 1991;27(1):79-83 - PubMed
    1. Br J Cancer. 1988 Mar;57(3):277-80 - PubMed
    1. Proc Natl Acad Sci U S A. 1991 May 15;88(10):4148-52 - PubMed
    1. J Immunol. 1988 May 1;140(9):3261-5 - PubMed

Publication types

MeSH terms

Substances

LinkOut - more resources