UP1 is a non-glycosylated secretoglobin family member protein which induces anti-inflammatory and anti-tumorigenic responses. The expression of Uteroglobin is induced by steroid hormones such as estrogen which is further enhanced by the non-steroid hormone prolactin. UP1 has been shown to induce growth stimulatory effects, sequester pro-inflammatory mediators and carcinogens and inhibit cell migration, cell invasion, platelet aggregation and T cell differentiation.