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Experimental animal model for assessment of tracheal epithelium regeneration
Author(s) -
Safronova Elizaveta I.,
Dydykin Sergey S.,
Grigorevskiy Evgeny D.,
Tverye Ekaterina A.,
Kolchenko Stepan I.,
Piskunova Natalia N.,
Denisova Anna V.,
Titova Galina P.,
Parshin Vladimir D.,
Romanova Olga A.,
Panteleyev Andrey A.
Publication year - 2019
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1002/lary.27480
Subject(s) - scaffold , fixation (population genetics) , regeneration (biology) , medicine , epithelium , stent , wound healing , anatomy , biomedical engineering , tracheal stenosis , tissue engineering , surgery , pathology , airway , biology , microbiology and biotechnology , population , environmental health
Objectives/Hypothesis To develop an experimental model in rabbits for assessment of tracheal epithelium regeneration through application of either natural or artificial polymer scaffolds. Study Design First, we identified the size of full‐thickness mucosal defect, which does not allow self‐healing (a “critical defect”), thus representing an adequate experimental model for regenerative therapy of tracheal epithelium damage. Then, two methods of polymer scaffold fixation at the site of the epithelium defect were compared: suturing and fixation with a stent. This was done through: 1) formation of a full‐thickness anterolateral mucosal defect by tracheal mucosa excision; and 2) fixation of the scaffold at the site of the tracheal epithelium defect using sutures (through a tracheal wall “window”) or a vascular stent (through a small tracheal incision). Results The dimension of a critical anterolateral mucosal defect of the trachea for rabbits was found to be 1.5 cm in length and more than 50% of the tracheal circumference. Fixation of the scaffold with a stent proved to be more efficient due to a uniform distribution of the pressure over the entire surface of the scaffold, whereas the suturing of the scaffold provided unsatisfactory results. In addition, fixation of the scaffold by suturing required formation of a large “window” in the tracheal wall. Thus, using the stent appeared to be technically less complicated and much less traumatic as compared to suturing. Conclusion We present an experimental in vivo animal model of tracheal epithelium injury and recovery. It can be effectively used with certain further modifications as a basis for routine testing of bioengineered constructs. Level of Evidence NA Laryngoscope , 129:E213–E219, 2019