Anti-inflammatory effects of flap and lymph node transfer

Area of Science:

• Surgical reconstruction
• Tissue engineering
• Immunology

Background:

• Tissue transfer is common for wound repair and defect reconstruction.
• Microvascular lymph node transfer (LN) is a novel approach to enhance lymphatic function in lymphedema patients.
• Understanding cytokine profiles post-flap transfer is crucial for optimizing outcomes.

Purpose of the Study:

• To investigate the biological effects of flap transfer with and without lymph nodes.
• To analyze the production of key cytokines and growth factors in wound exudate.
• To elucidate the mechanisms behind the benefits of flap transfer in various patient groups.

Main Methods:

• Analysis of axillary wound exudate samples from four patient groups: axillary lymph node dissection (ALND), microvascular breast reconstruction (BR), LN transfer, and combined LN and BR (LN-BR).
• Quantification of proinflammatory, anti-inflammatory, prolymphangiogenic, and antilymphangiogenic cytokines and growth factors.

Main Results:

• Flap transfer groups exhibited a reduced proinflammatory cytokine response compared to the ALND group.
• The anti-inflammatory and antifibrotic cytokine IL-10 was elevated in the LN-BR group.
• LN and LN-BR groups demonstrated an overall anti-inflammatory cytokine profile.

Conclusions:

• Healthy tissue transfer mitigates the postoperative proinflammatory response, explaining its benefits in diverse surgical scenarios.
• Flap transfer incorporating lymph nodes appears to confer an antifibrotic effect.
• The therapeutic impact of LN transfer in lymphedema may involve increased vascular endothelial growth factor C (VEGF-C) and IL-10 production.