title: Spontaneous acquisition of infinite proliferative capacity by a rabbit corneal endothelial cell line with maintenance of phenotypic and physiological characteristics.
abstract: Rabbit cells and models are frequently used in pharmacological experiments and toxicity tests and are particularly useful for corneal transplant experiments. Here, we obtained a corneal endothelial cell line from normal rabbit corneal endothelium that had acquired infinite proliferative potential without requiring gene transfer. These infinitely proliferative rabbit corneal endothelial cells (iRCECs) could be cultured for > 250 generations and exhibited a greater ability to proliferate than did normal rabbit corneal endothelial cells (RCECs) cultivated by conventional methods. The results of reverse transcriptase-polymerase chain reaction (RT-PCR) and immunostaining analyses revealed that the expression profiles of corneal endothelial markers, such as collagen type VIIIα1 and Na+/K+-ATPase, were similar to those of RCECs and in vivo corneal endothelium. Scanning electron microscopy showed that many microvilli were present on the surface of the cells and that the ultrastructure was maintained. In addition, we verified that the iRCECs had similar levels of pump function as did RCECs using an Ussing chamber system. The results of a soft agar colony-formation assay suggested that the iRCECs were not tumourigenic. Taken together, our results demonstrated that the iRCECs exhibited gene expression profiles and properties that were equivalent to those of native rabbit corneal endothelium, making these cells useful for corneal endothelial research studies. Copyright © 2015 John Wiley & Sons, Ltd.
authors.affiliation: Department of Ophthalmology, Osaka University Medical School, Suita, Japan.|Ophthalmic Research and Development Centre, Santen Pharmaceutical Co. Ltd, Ikoma-shi, Nara, Japan.
authors.forename: Tomofumi
authors.initials: T
authors.lastname: Kageyama
authors.affiliation: Department of Ophthalmology, Osaka University Medical School, Suita, Japan.
authors.forename: Ryuhei
authors.initials: R
authors.lastname: Hayashi
authors.affiliation: Department of Ophthalmology, Osaka University Medical School, Suita, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Hara
authors.affiliation: Department of Ophthalmology, Osaka University Medical School, Suita, Japan.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Yoshikawa
authors.affiliation: Department of Ophthalmology, Osaka University Medical School, Suita, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Ishikawa
authors.affiliation: Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Yamato
authors.affiliation: Department of Ophthalmology, Osaka University Medical School, Suita, Japan.
authors.forename: Kohji
authors.initials: K
authors.lastname: Nishida
mesh_terms: D016475:3T3 Cells; D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D049109:Cell Proliferation; D048430:Cell Shape; D002478:Cells, Cultured; D042783:Endothelial Cells / Q000166:cytology* / Q000502:physiology*; D004728:Endothelium, Corneal / Q000166:cytology*; D005786:Gene Expression Regulation; D051379:Mice; D010641:Phenotype; D011817:Rabbits
chemical_list: D015415:Biomarkers
keywords: cell line; cornea; corneal endothelium; immortalization; proliferation; regenerative medicine