Factors influencing the retrograde labeling of retinal ganglion cells with fluorogold in an animal optic nerve crush model.

Abstract:

PURPOSE:To investigate whether different crush durations or a different fluorogold (FG) injection timing can affect the efficiency of FG retrograde labeling of retinal ganglion cells (RGCs) in the optic nerve (ON) crush model. METHODS:We performed the ON crush in rats with a clip at different durations or a jewel forceps to compare the effects of different crush methods with FG staining. RGC density was compared between the FG injection 1 week before the sacrifice of the animals (group A) and the injection before the crush experiment (group B). Double staining with CD11b and FG in the retinal sections was conducted to investigate the relationship between the overcounting of RGCs and microglia. RESULTS:The FG-stained particles were significantly decreased at the distal part of the crush site compared to the proximal site of the ON with a crush duration of over 30 s or when crushed with the jewel forceps. Two weeks after ON crush, the RGC count was higher both in the central and mid-peripheral retinas in group B. The percentage of CD11b-stained cells among the FG-stained cells in the RGC layer of retinas in group B was higher than that of group A (34% in group B vs. 4% in group A, p = 0.0001). Overcounting of RGC density in group B was due to additional microglia with FG engulfing. CONCLUSIONS:Our results suggest that each laboratory should test its setting conditions to avoid factors influencing the RGC density measurement before conducting ON crush experiments.

journal_name

Ophthalmic Res

journal_title

Ophthalmic research

authors

Huang TL,Huang SP,Chang CH,Lin KH,Sheu MM,Tsai RK

doi

10.1159/000357736

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

173-8

issue

4

eissn

0030-3747

issn

1423-0259

pii

000357736

journal_volume

51

pub_type

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