目的对比分析恒河猴和树鼩角膜内皮细胞的特点和差异。方法利用非接触式自动角膜内皮细胞仪SP3000P分别对6只恒河猴(12眼)和20只树鼩(40眼)进行角膜内皮细胞测量,并获得角膜的8个相关参数:中央角膜厚度(CCT)、最小细胞面积(Smin)、最大细胞面积(Smax)、平均细胞面积(Savg)、细胞面积标准差(SSD)、细胞面积变异系数(CV)、细胞密度(CD)和六边形细胞百分比(HG),并结合文献与人眼的相关参数进行对比分析。结果 SP3000P角膜内皮细胞仪能在较短时间内完成恒河猴和树鼩角膜内皮的图像采集和参数的检查,耗时差异无显著性。恒河猴和树鼩CCT分别为(449.2±12.8)μm和(262.4±24.6)μm;Smin分别为(120.4±26.3)S/μm^2和(153.2±42.9)S/μm^2;Smax分别为(705.0±130.8)S/μm^2和(468.7±109.3)S/μm^2;Savg分别为(351.1±26.1)和(295.4±18.9)S/μm^2;SSD分别为(113.1±27.4)和(75.9±27.3)S/μm^2;CV分别为(31.9±6.0)和(25.3±8.3);CD分别为(2874.2±203.8)p/cell·mm^-2和(3399.3±224.7)p/cell·mm^-2;HG%分别为(58.6±9.1)和(94.0±9.7)。二者的上述参数差异均有显著性(P〈0.05)。树鼩角膜厚度比恒河猴小,内皮细胞面积、变异系数也较恒河猴小,但是角膜内皮细胞密度和六边形细胞比例显著高于恒河猴。恒河猴角膜厚度、角膜内皮细胞变异系数和六边形细胞比例与人眼高度相似,但内皮细胞密度低于人眼;树鼩角膜厚度为恒河猴的60%、人眼的50%,但角膜内皮细胞密度和平均细胞面积更接近于10-20岁人眼。结论恒河猴和树鼩角膜内皮细胞的形态和各项参数均有显著差异,各自与人眼角膜内皮细胞既有相似之处,也有不同点,恒河猴和树鼩均是研究人类角膜内皮疾病可以选择的合适实验动物。
Objective To analyze and compare the characteristics and differences of corneal endothelial cells of rhesus monkey and tree shrew eyes. Methods Corneal endothelial cells of 6 healthy rhesus monkeys( 12 eyes) and 20 healthy tree shrews( 40 eyes) were measured using a non-contact SP3000 P specular microscope. Eight parameters were determined and compared with relevant parameters of human eyes reported in the literature,including minimum cell area( Smin),maximum cell area( Smax),average cell area( Savg),standard deviation of cell area( SD),coefficient of variability( CV),cell density( CD),hexagonality percentage( HG%) and central corneal thickness( CCT). Results The imaging and measurement of all parameters could be completed in a short time both in rhesus monkeys and tree shrews. The time spent in the two kinds of animals was not significantly different. The CCT was( 449. 2 ± 12. 8) μm and( 262. 4 ±24. 6) μm,Sminwas( 120. 4 ± 26. 3) S / μm2and( 153. 2 ± 42. 9) S / μm^2,Smaxwas( 705. 0 ± 130. 8) S / μm^2 and( 468. 7± 109. 3) S / μm^2,Savgwas( 351. 1 ± 26. 1) and( 295. 4 ± 18. 9) S / μm^2,SSDwas( 113. 1 ± 27. 4) and( 75. 9 ± 27. 3)S / μm^2,CV was( 31. 9 ± 6. 0) and( 25. 3 ± 8. 3),CD was( 2874. 2 ± 203. 8) p/cell·mm^- 2 and( 3399. 3 ± 224. 7) p /cell·mm^- 2,and the HG% was( 58. 6 ± 9. 1) and( 94. 0 ± 9. 7) in the rhesus monkeys andt tree shrews,respectively.The differences of all the above parameters between rhesus monkeys and tree shrews were statistically significant( P〈0. 05 for all). The cornea of tree shrews was significantly thinner than that of rhesus monkeys. The area and coefficient of variability of tree shrews were smaller to those of rhesus monkeys,while the cell density and hexagonality percentage were higher than those of rhesus monkeys. Compared with human eyes,the CCT,CV and HG% in rhesus monkeys were highly similar,while the CD was lower than that of human eyes. The C