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Breast tissue ablation with irreversible electroporation in rabbits: A safety and feasibility study.

Breast tissue ablation with irreversible electroporation in rabbits: A safety and feasibility study.
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Zhang W, Wang W, Chai W, Luo X, Li J, Shi J, Bi L, Niu L,


Zhang W, Wang W, Chai W, Luo X, Li J, Shi J, Bi L, Niu L, (click to view)

Zhang W, Wang W, Chai W, Luo X, Li J, Shi J, Bi L, Niu L,

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PloS one 2017 07 2112(7) e0181555 doi 10.1371/journal.pone.0181555
Abstract
BACKGROUND AND AIM
Irreversible electroporation (IRE) was confirmed to control several solid tumors effectively in vivo. Our preclinical study aimed to assess the feasibility and safety of IRE in the breast of rabbit.

METHODS
Thirty New Zealand white rabbits were randomly divided into 3 groups of 10 rabbits (control group, IRE group A, and B). Two mono-electrode needles were inserted into the breast tissue by percutaneous puncture. Electrocardiogram and vital signs were monitored before, during, and after ablation. Histopathology, immunohistochemistry, and transmission electron microscopy were examined at 0 hours, 12 hours, 24 hours, 4 days, 7 days, 14 days, and 28 days after ablation.

RESULTS
All the rabbits survived the procedure with no significant adverse effects. Intra-operative ventricular arrhythmias occurred in 1 rabbit from IRE group B and was immediately relieved after ablation. Reversible subcutaneous hemorrhage was observed in 8 rabbits from IRE group A and 7 rabbits from IRE group B. No skin was burnt, however, pectoralis major muscle injuries were found in all rabbits. Histopathological and ultrastructural examination revealed the coexistence of cell necrosis and apoptosis. HE, TUNEL, and Masson staining revealed breast tissue injury and the recovery of damage by fibrous tissue and granulation tissue. Notably, the structures of mammary gland lobules and interstitial components of the breasts were well preserved.

CONCLUSIONS
Our study suggests that IRE destroys breast cancer while effectively preserving the skin, the structure of mammary gland lobules, and interstitial components. IRE may be a promising technique to locally control breast cancer and to maintain the esthetic of the breast.

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