Biagio Valentino , Giampiero La Rocca , Rita Anzalone , Simona Corrao , Francesca Rappa , Diego Lipari , Alessandro Valentino , Giovanni Peri , Francesco Cappello , Elvira Vittoria Farina-Lipari , Atrial Natriuretic Factor Downregulation During Breast Cancer Progression, Research Journal of Biological Sciences, Volume 3,Issue 2, 2008, Pages 246-250, ISSN 1815-8846, rjbsci.2008.246.250, (https://makhillpublications.co/view-article.php?doi=rjbsci.2008.246.250) Abstract: We researched in a series of human breast cancers of different stages the presence and the expression of Atrial Natriuretic Factor (ANF) and Oxytocin (OX), by immunohistochemistry and RT-PCR. We found a reduction of expression of ANF during cancer progression. By contrast, OX resulted lightly expressed by immunohistochemistry and negative at RT-PCR. We hypothesize that ANF could be considered a novel marker to predict breast cancer progression; by contrast, OX expression should be better investigated, to clarify also the putative role of oxytocinases in human breast carcinogenesis. Keywords: Atrial natriuretic factor;oxytocin;breast cancer;carcinogenesis