Title :

Perilymph sampling in Mongolian gerbil, technical note and procedure evaluation.

Author(s) :

Olivier, Claire [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Beck, cyril [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Risoud, Mickaël [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Lemesre, Pierre-Emmanuel [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Siepmann, Juergen [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Siepmann, Florence [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Vérin, Jérémy [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Goossens, Jean-Francois [Auteur]
Groupe de Recherche sur les formes Injectables et les Technologies Associées (GRITA) - ULR 7365
Kouach, Mostafa [Auteur]
Groupe de Recherche sur les formes Injectables et les Technologies Associées - ULR 7365 [GRITA]
Bongiovanni, Antonino [Auteur]
Plateformes Lilloises en Biologie et Santé (PLBS) - UAR 2014 - US 41
Hubert, Thomas [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Tardivel, Meryem [Auteur]
Plateforme BioImaging Center Lille - PLBS [BICeL]
Vincent, Christophe [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]
Toulemonde, Philippine [Auteur]
Centre Hospitalier Régional Universitaire [CHU Lille] [CHRU Lille]

Journal title :

Hearing Research

Abbreviated title :

Hear Res

Volume number :

458

Pages :

109188

Publisher :

Elsevier

Publication date :

2025-02-02

ISSN :

1878-5891

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

Objective The aim of this study is to detail and evaluate the surgical procedure for perilymph sampling from the cochlear apex in the Mongolian gerbil. Design Perilymph sampling from the cochlear apex was performed one ...
Show more >Objective The aim of this study is to detail and evaluate the surgical procedure for perilymph sampling from the cochlear apex in the Mongolian gerbil. Design Perilymph sampling from the cochlear apex was performed one to three time in 12 male gerbils aged 8 to 12 months via the submandibular route. 11 of them were previously implanted with intracochlear implants loaded with dexamethasone and placed in the scala tympani, the 12th was used to collect control samples. The procedure was performed under general gas anesthesia, with head support, by a submandibular approach. After opening the bulla and sacrificing the external and middle ears, the cochlea was exposed and perilymph sampled. Macroscopic features of perilymph samples were reported before an HPLC-MS/MS assay to detect and quantify dexamethasone. Some cochleae were then harvested, immunostained and cleared to study fibrosis formation along the labyrinth and evaluate the consequences of multiple sampling procedures. Results The perilymph sampling procedure was technically difficult and required experimenter training. The procedure was well tolerated by the animals. One drawback of this technique in our gerbil model was the need to sacrifice the external ear, eardrum and ossicular chain to allow sufficient exposure for a quality procedure. Our technique enabled the collection of perilymph samples of the desired volume. Most of our samples were contaminated by bleeding from the otic capsule bone secondary to the cochleostomy. Nevertheless, HPLC-MS/MS analyses which successfully found dexamethasone in the perilymph of implanted gerbils, confirmed that our method was suitable for pharmacokinetic analyses. The occurrence of areas of fibrosis in the labyrinth after a sampling procedure compromises the quality and reliability of subsequent samples from the same animal. Conclusion The Mongolian gerbil is an animal model that can be used to collect perilymph from the cochlear apex to perform pharmacokinetic studies. The number of samples taken from a single animal must be limited to one.Show less >

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CHU Lille

Collections :

• Groupe de Recherche sur les formes Injectables et les Technologies Associées (GRITA) - ULR 7365

Submission date :

2025-02-14T22:01:21Z
2025-02-25T13:09:03Z