Breast cancer is one of the most
common cancers in women worldwide.
In the past decades, many advances have been made in understanding
and treating breast cancer. However, due to the highly heterogeneous
nature of this disease, a precise characterization of breast cancer
on the molecular level is of great importance but not yet readily
available. In the present study, we systematically profiled proteomes
and N-glycoproteomes of cancerous, paracancerous, and distal noncancerous
tissues from patients with breast cancer. The data revealed distinct
proteomic and N-glycoproteomic landscapes between different tissues,
showing biological insights obtained from the two data sets were complementary.
Specifically, the complement and angiogenesis pathways in the paracancerous
tissues were activated. Taken together, the changes that occurred
in paracancer tissue and N-glycoproteomics are important complements
to the conventional proteomic analysis of cancer tissue. Their combination
provides more precise and sensitive molecular correlates of breast
cancer. Our data and strategy shed light on precisely defining breast
cancer, providing valuable information for individual patient diagnosis
and treatment. The MS data of this study have been deposited under
the accession number IPX0001924000 at iProX.