新生雏鸡眼睛间质液的渗透压及其在明适应和暗适应下的变化。

Osmotic pressure of the interstitial fluid obtained from neonatal chick eyes and its variation under light and dark adaptation.

作者信息

Sato T, Yoneyama T, Matsumoto N, Somei K, Suzuki T A, Tazawa Y

出版信息

Doc Ophthalmol. 1985 Oct 30;61(1):79-89. doi: 10.1007/BF00143219.

Abstract

In experiments by Yoneyama et al. (1985) a hypertonic perfusing solution was used to record the c-wave from the isolated chick retina. We investigated whether the chick retina was surrounded by such hypertonic liquids. The following results were found: the osmolarity of the subchoroidal humor was markedly higher than that of fluids from other areas of the eye; the relative difference in osmolarity between both sides of the retina was 110-170 mOsmol in the light-adapted condition, whereas it was about 270 mOsmol in the dark-adapted condition; and in the dark-adapted state the volume of the subchoroidal humor decreased about 40% but increased in osmolarity about 30-40%, whereas osmolarity of the subvitreous humor decreased about 15-20 mOsmol. Results suggest the presence of an inward-directed pump mechanism for water-soluble components in the retina in addition to the proposed outward-directed pump mechanism of the pigment epithelium. The inward-directed pump may be more active in the dark-adapted state.

摘要

米山等人（1985年）的实验中，使用高渗灌注液记录离体鸡视网膜的c波。我们研究了鸡视网膜是否被这种高渗液体所包围。结果如下：脉络膜下液的渗透压明显高于眼内其他区域的液体；在明适应状态下，视网膜两侧渗透压的相对差异为110 - 170毫摩尔，而在暗适应状态下约为270毫摩尔；在暗适应状态下，脉络膜下液的体积减少约40%，但渗透压增加约30 - 40%，而玻璃体下液的渗透压降低约15 - 20毫摩尔。结果表明，除了色素上皮细胞向外的泵机制外，视网膜中还存在水溶性成分向内的泵机制。向内的泵在暗适应状态下可能更活跃。