Breast tumors, particularly breast cancer, are increasingly prevalent in China, with a noticeable trend towards younger ages. Preliminary research indicates that Type III Collagen (COL3) plays a crucial role in tissue and organ protection within the tumor microenvironment and can inhibit tumor progression through microenvironmental remodeling. However, there are no clinical studies related to COL3 in breast tumors. This project aims to initiate a multicenter, prospective, randomized, open-label, parallel-controlled trial by locally administering recombinant humanized Type III Collagen (rhCOL3) to patients undergoing breast tumor surgery. The study will observe the incidence of perioperative complications after rhCOL3 injection, as well as changes in aesthetic outcomes and tumor-related pathological indicators following breast tumor surgery with local rhCOL3 injection. The goal is to establish a targeted rhCOL3 local injection therapy with dual functions of local protection and synergistic treatment, providing a new strategy for the treatment of breast tumors.
Females aged 18 years or older but not exceeding 80 years;
Clinical and imaging diagnosis of breast tumor, planned for needle biopsy;
Planned to undergo breast tumor surgery and may plan for whole-breast radiotherapy;
No systemic anti-tumor treatment or local treatment (including chemotherapy and radiotherapy) has been received before screening;
None
Parallel
Recombinant Humanized Type III Collagen Injection
Biological/VaccinerhCOL3/saline will be injected around the tumor (at four points: outer upper, inner upper, outer lower, and inner lower) before surgery, with 500ul per site. After the surgical margin is confirmed to be safe by rapid frozen pathology during surgery, a second injection of 2ml will be administered around the surgical area skin (at points spaced along the skin incision), followed by routine tissue flap revision and suture.
Short-term postoperative complications after surgery and radiotherapy.
The purpose of this study is to assess the incidence rate of short-term complications within 3 months after patients complete surgery and radiotherapy. The main complications are defined as surgery or radiotherapy-related complications occurring during postoperative follow-up, including delayed wound healing, partial skin necrosis, infection, and hematoma and seroma; common adverse reactions related to breast radiotherapy include acute radiation dermatitis, breast edema, pain, etc., and late-stage breast fibrosis, edema, atrophy, telangiectasia, etc.
Changes in clinical pathological indicators
For patients undergoing breast tumor surgery, observe changes in immune cell infiltration (CD4, CD8, FoxP3, CD80, CD206, etc.), fibroblast activation (FAP, α-SMA, S100a4, etc.), extracellular matrix remodeling (COL3A1, COL1A1), and cancer cell activation status (ki-67, P27, etc.) in postoperative pathological tissue to assess the impact of rhCOL3 on the tumor microenvironment.
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