Effects of Exosome Adminstration in Preventing Early Leakage in Rectal Cancer Patients Undergoing Low Anterior Resection

Anastomotic leakage remains one of the most severe complications following colorectal surgery, leading to increased morbidity, prolonged hospitalization, and reduced quality of life. Despite advances in surgical techniques and perioperative care, the incidence of early anastomotic leaks persists. Practical strategies to reduce this risk are crucial for improving patient outcomes.

Recent studies have highlighted the potential role of mesenchymal stem cell-derived exosomes in enhancing tissue repair and modulating inflammation. These extracellular vesicles, derived from human placenta mesenchymal stem cells (hPMSC), contain bioactive molecules such as proteins, lipids, and RNA that facilitate cellular communication and promote healing processes. Preclinical research suggests that exosomes can support anastomotic healing by reducing local inflammation.

This study aims to evaluate the safety and efficacy of intraperitoneal administration of hPMSC-derived exosomes in preventing early anastomotic leakage in patients undergoing low anterior resection (LAR) for rectal cancer. We hypothesize that the exosome treatment will significantly reduce the incidence of anastomotic leaks compared to placebo, thereby improving postoperative recovery and reducing hospital stay.

Inclusion criteria

-Patients with Stage II-III rectal cancer who underwent neoadjuvant chemoradiation therapy and are candidates for low anterior resection surgery

Exclusion criteria

• Patients who need emergency surgery (presenting with peritonitis or signs of obstruction)
• Patients with apparent malnutrition or patients who have serum albumin levels of less than 3 g/dl
• Patients who receive corticosteroids ( an equivalent dose of prednisolone 5 mg/day or more)
• Patients with chronic pulmonary disease
• Patients who need more than two units of blood transfusion perioperatively