Abstract: The present inventors show that cannibal cells can undergo senescence after entosis in vivo and that the tumor suppressive protein p53 act as a repressor of this phenomenon. They therefore propose new tools to study the molecular pathways involved in the cannibalism process, for example by measuring the expression levels of p53 or splice variants thereof (such as ?133TP53, TP53?, TP53? or ?40TP53), the release of extracellular ATP or purinergic P2Y2 receptor activity. The present inventors also demonstrated that the detection of senescent cannibal cells in breast adenocarcinoma obtained from patients treated with neo-adjuvant therapy positively correlates with good patient's response to treatment. Altogether, these results provide the first evidence that detection of cellular cannibalism and senescence simultaneously in tumors helps for the diagnosis of disease outcomes and for the prediction of treatment efficiency against cancer diseases.

Abstract: The present inventors show that cannibal cells can undergo senescence after entosis in vivo and that the tumor suppressive protein p53 act as a repressor of this phenomenon. They therefore propose new tools to study the molecular pathways involved in the cannibalism process, for example by measuring the expression levels of p53 or splice variants thereof (such as ?133TP53, TP53?, TP53? or ?40TP53), the release of extracellular ATP or purinergic P2Y2 receptor activity. The present inventors also demonstrated that the detection of senescent cannibal cells in breast adenocarcinoma obtained from patients treated with neo-adjuvant therapy positively correlates with good patient's response to treatment. Altogether, these results provide the first evidence that detection of cellular cannibalism and senescence simultaneously in tumors helps for the diagnosis of disease outcomes and for the prediction of treatment efficiency against cancer diseases.

Abstract: The present invention provides methods and compositions (such as pharmaceutical compositions) for treating or preventing human immunodeficiency virus type 1 (HIV-1) infection. More particularly, the present invention relates to a blocking agent of a component of the purinergic signalling pathway selected from the group consisting of pannexin 1, ATP or P2Y2 receptor for use in the treatment or prevention of HIV-1 infection.