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Updated: Jul 2, 2026

A General Method for Detecting Nitrosamide Formation in the In Vitro Metabolism of Nitrosamines by Cytochrome P450s
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Development of differential cytotoxic compounds containing nitrosourea and benzothiazine nucleus

M K Nyati1, D Rai, R R Gupta

  • 1Department of Zoology, University of Rajasthan, Jaipur, India.

In Vivo (Athens, Greece)
|January 1, 1997
PubMed

Insights

Four new benzothiazinyl-nitrosourea compounds showed potent anticancer activity against Ehrlich Ascitic Carcinoma (EAC) solid tumors. These novel compounds demonstrated superior toxicological selectivity compared to existing chemotherapy drugs.

Area of Science:

  • Medicinal Chemistry
  • Pharmacology
  • Cancer Research

Background:

  • Nitrosourea compounds are a class of anticancer agents.
  • Developing novel anticancer drugs with improved selectivity is crucial.

Purpose of the Study:

  • To evaluate the in vivo anticancer activity of four novel benzothiazinyl-nitrosourea compounds.
  • To compare the efficacy and toxicity of these compounds against established chemotherapy drugs.

Main Methods:

  • In vivo assessment of compound activity against Sarcoma-180 (S-180) and Ehrlich Ascitic Carcinoma (EAC) tumor models.
  • Toxicological evaluation and comparison with 5-fluorouracil and 6-mercaptopurine.

Main Results:

  • One compound (no. 4) significantly inhibited EAC solid tumor growth to 3% of control.
  • All tested compounds exhibited greater toxicological selectivity than 5-fluorouracil and 6-mercaptopurine.
  • Compounds showed potential for DNA interaction via alkylation and intercalation.

Conclusions:

  • Benzothiazinyl-nitrosourea compounds represent a promising new class of anticancer agents.
  • The selective toxicity may stem from inhibited carbamoylation, preserving potency through DNA-reactive decomposition products.

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