Inhibition of the recovery from potentially lethal damage by lonidamine

Lonidamine [1-(2,4-dichlorobenzyl)-1-H-indazol-3-carboxylic acid] is shown to inhibit recovery from potentially lethal damage after exposure of cells to X-rays, methyl methane sulfonate, or bleomycin and heat (43 degrees C, 1h). Inhibition is most effective when the drug is present before and after exposure of 10 to 25 mg l-1, a concentration readily achievable in vivo.