Cell turnover in ciliary epithelium compared to other slow renewing epithelia in the adult mouse.

Abstract:

:Adult albino mice received tritiated thymidine either injected subcutaneously (333 microCi) every 6 hours for up to 36 hours, or administered in their drinking water for up to 74 days (about 45 microCi/day). Tissue sections were examined with autoradiography to determine the distribution of the label. Animals receiving subcutaneous injections showed no labeled cells in the choroid plexus epithelium and only one cell of 6600 cells counted in the ciliary epithelium was labeled. Animals exposed to the isotope in their drinking water for 74 days showed considerable uptake of label in hepatocytes (15%) and cortical kidney tubules (17%), whereas ciliary and choroid epithelia showed very low uptake at 0.25% and 0.01%, respectively. The data show that the ciliary and choroid epithelia have a very slow turnover rate compared to other slow renewing tissues, and, under normal conditions, these tissues are not renewed in the animal's adult life span.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

McDonald TF,Green K

doi

10.3109/02713688809047029

subject

Has Abstract

pub_date

1988-03-01 00:00:00

pages

247-52

issue

3

eissn

0271-3683

issn

1460-2202

journal_volume

7

pub_type

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