Polans Arthur S, McAnulty Jonathan F, Phelps Paul O, Darjatmoko Soesiawati R, Burris Christopher K, Albert Daniel M
Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, WI.
McPherson Eye Research Institute, University of Wisconsin, Madison, WI.
Ocul Oncol Pathol. 2017 Dec;4(1):52-56. doi: 10.1159/000475994. Epub 2017 Jul 19.
BACKGROUND/AIMS: Establish a reliable rabbit dry eye (DE) model.
An interventional cohort study surgically removing glands contributing to the tear film. Eight rabbits were studied after removal of left lacrimal, Harderian, or both glands. Additional rabbits had Meibomian glands in the left eye thermally obstructed. All were followed for 10 weeks with phenol red thread (PRT) and slit-lamp examination with 2% fluorescein. We assessed corneal sensitivity using a Cochet-Bonnet esthesiometer. Outcome measures were severity/duration of reduced PRT, punctate epithelial erosions (PEE), and histologic evidence of corneal pannus.
Fluorescein staining demonstrated signs of dryness including PEE in all of the interventional eyes. The subjective measurement of epithelial erosions correlated with decreased tear production. PRT measurements in the control eyes averaged 31.54 mm (±1.83) and 22.71 mm (±1.60) in the eight left eyes, without loss of corneal sensitivity.
Surgical removal of either the Harderian or lacrimal gland results in statistically significant decreases in tear volume and the development of severe DE. Removal of both glands results in the occurrence of a DE of comparable severity/duration to removal of either the lacrimal or Harderian gland alone. Meibomian gland obstruction contributes less to the DE model.
背景/目的:建立一种可靠的兔干眼模型。
一项干预性队列研究,通过手术切除对泪膜有贡献的腺体。八只兔子在切除左侧泪腺、副泪腺或两者后接受研究。另外的兔子左眼睑板腺受到热阻塞。所有兔子均用酚红棉线(PRT)随访10周,并使用2%荧光素进行裂隙灯检查。我们使用Cochet-Bonnet眼压计评估角膜敏感性。观察指标为PRT缩短的严重程度/持续时间、点状上皮糜烂(PEE)以及角膜血管翳的组织学证据。
荧光素染色显示所有干预眼均有干眼迹象,包括PEE。上皮糜烂的主观测量结果与泪液分泌减少相关。对照组眼睛的PRT测量值,八只左眼平均为31.54毫米(±1.83),且角膜敏感性未丧失。
手术切除副泪腺或泪腺会导致泪液量在统计学上显著减少,并出现严重干眼。切除两者导致的干眼严重程度/持续时间与单独切除泪腺或副泪腺相当。睑板腺阻塞对干眼模型的影响较小。