The present invention relates to methods of treating cancer in a human subject in need thereof. In particular, the present invention relates to treating a cancer by administering a recombinant virus which expresses one or more biotherapeutic agents in a subject, and administering to the subject a nucleotide analogue or nucleotide precursor analogue chemotherapeutic agent. The invention further relates to method for treating cancer by administering a nucleotide analogue or nucleotide precursor analogue chemotherapeutic agent and a caspase inhibitor, and, optionally, also administering a recombinant virus expressing one or more biotherapeutic agents in the subject. The invention also relates to a method for treating cancer by administering purified interferon gamma to a subject and administering to the subject a nucleotide analogue or nucleotide precursor analogue chemotherapeutic agent. Also provided are pharmaceutical compositions, including controlled release pharmaceutical compositions containing: a nucleotide analogue or nucleotide precursor analogue chemotherapeutic agent and a recombinant virus; a nucleotide analogue or nucleotide analogue precursor chemotherapeutic agent and a caspase inhibitor; or a purified interferon gamma and a nucleotide analogue or nucleotide precursor analogue chemotherapeutic agent.La présente invention concerne des procédés de traitement d'un cancer chez un sujet humain qui en a besoin. En particulier, la présente invention concerne le traitement d'un cancer par l'administration d'un virus recombinant qui exprime un ou plusieurs agents biothérapeutiques chez un sujet et l'administration, au sujet, d'un agent chimiothérapeutique de type analogue nucléotidique ou analogue de précurseur nucléotidique. L'invention concerne en outre un procédé de traitement d'un cancer par l'administration d'un agent chimiothérapeutique de type analogue nucléotidique ou analogue de précurseur nucléotidique et d'un inhibiteur de caspase et, facultativement,