TGFBR1 and breast cancer: Finally, we looked specifically at TNBC breast cancer patients and stratified the population based on low (<0 fold), normal (0–2 fold) or high (>2 fold) TGF-ΒR1 mRNA expression and found reduced disease-specific survival in TNBC patients with elevated TGF-ΒR1 mRNA expression (Figure 2C).