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“We discovered that the combination of cysteine or other small thiols with either isoniazid or rifampicin prevents the formation of drug-tolerant and drug-resistant cells in Mtb cultures.”
Proceedings of the National Academy of Sciences • 2017 | View Paper
“These findings are interpreted in the light of the hypothesis that in INH intoxication there may be a reduction of available axonal glutathione and cysteine due to inhibition of the pyridoxal phosphate-dependent enzymes cystathionine synthetase and cystathioninase.”
“We had previously shown that cysteine , a derivative of NAC, potentiated the activity of isoniazid , a first-line TB drug, by preventing the emergence of INH resistance and persistence in M. tuberculosis in vitro.”