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. 2021 Mar 5;7:24. doi: 10.1038/s41523-021-00227-7

Fig. 4. Comparison of the perfusate proteome to primary breast cancer (BC) and plasma proteomes yields novel data.

Fig. 4

We stratified the TCGA(CPTAC) primary BC proteomics data into three groups according to axillary tumour burden (ATB): those who had a sentinel lymph node biopsy only (SLNB; no/low ATB); those who had a completion clearance (CC; higher burden of ATB than the SLNB group); and those who had an axillary lymph node dissection, and high ATB, at diagnosis (ALND). Of the 10 most abundant reactive proteins, ADD1 (p = 0.01; A) and specific ADD1 phospho-isoforms; ASPN (p = 0.02; B) and PRELP (p = 0.023; B) were significantly up-regulated in the SLNB group, matching our data. No metastatic proteins were found to be significantly differentially expressed. Comparison of the perfusate proteome with BC plasma proteomic studies (C) showed minimal overlap, with APOC3 and KRT9 identified as up-regulated in metastatic nodes/perfusate, and SERPIND1 as up-regulated in reactive nodes/perfusate. (Graphs show median with interquartile range).