RT Journal Article
SR Electronic
T1 Wet Adhesive Hydrogels to Correct Malacic Trachea (Tracheomalacia): A Proof of Concept
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2022.11.29.518329
DO 10.1101/2022.11.29.518329
A1 Uslu, Ece
A1 Rana, Vijay Kumar
A1 Anagnostopoulos, Sokratis
A1 Karami, Peyman
A1 Bergadano, Alessandra
A1 Courbon, Cecile
A1 Gorostidi, Francois
A1 Sandu, Kishore
A1 Stergiopulos, Nikolaos
A1 Pioletti, Dominique P.
YR 2022
UL http://biorxiv.org/content/early/2022/11/30/2022.11.29.518329.abstract
AB Tracheomalacia (TM) is a condition in which the anterior part of the trachea consisting of cartilage and/or the posterior part consisting muscle are too soft to ensure its mechanical support. This situation may result in an excessive and potentially lethal collapse of the airway in the newborns. Current treatment techniques include tracheal reconstruction, tracheoplasty, endo- and extraluminal stents, but are all facing important limitations.To reduce the shortcomings of actual TM treatments, this work proposes a new strategy by wrapping an adhesive hydrogel patch extraluminally around a malacic trachea. To validate this approach, first a numerical model revealed that a hydrogel patch with sufficient mechanical and adhesion strength can potentially preserve the trachea’s physiological shape. Accordingly, a new hydrogel formulation was synthesized employing the hydroxyethyl acrylamide (HEAam) and polyethylene glycol methacrylate (PEGDMA) as main polymer network and crosslinker, respectively. These hydrogels provide excellent adhesion on wet tracheal surfaces, thanks to a two-step photo-polymerization approach. Ex vivo experiments revealed that the developed adhesive hydrogel patches can restrain the collapsing of malacic trachea under applied negative pressure. This study, to be confirmed by in vivo studies, is open to the possibility of a new treatment in the difficult clinical situation of tracheomalacia in newborns.Competing Interest StatementThe authors have declared no competing interest.