Is dysfunction of caveolin-1 a link between systemic sclerosis and breast cancer, opening a window on both etiologies?

Archives of Medical Research
Niansong Qian, Takayuki Ueno

Abstract

Epidemiological and institutional studies have demonstrated an association between systemic sclerosis (SSc) and breast cancer. For example, breast cancer is one of the most common cancers seen in SSc patients, whereas a higher rate of cutaneous scleroderma appeared in a group in which SSc followed breast cancer diagnosis. Additionally, sex hormones and genetic factors within the estrogen receptor (ER) influence the development of SSc and breast cancer. An older age at diagnosis of SSc, lack of antinuclear antibody positivity and the presence of pulmonary fibrosis are shown to be associated with the development of breast cancer in SSc patients. On the other hand, increased mammographic densities that may be caused by SSc are an important risk factor for breast cancer development. Despite the evidence that SSc and breast cancer are epidemiologically linked, the cause of this correlation is unclear. Caveolin-1 (Cav-1) is a negative regulator that inhibits the basal activity of several pro-proliferative and oncogenic proteins. Cav-1 regulated TGF-beta/Smad signaling appears to participate in the pathogenesis of breast cancer and tissue fibrosis in SSc. Thus, it is proposed that Cav-1 regulated TGF-beta/Smad signaling via Cav-1 scaf...Continue Reading

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