Localisation of thromboxane A2 receptors and the corresponding mRNAs in human eye tissue.

Localisation of thromboxane A2 receptors and the corresponding mRNAs in human eye tissue.
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人眼组织中血栓素 A2 受体和相应 mRNA 的定位。

DOI:
10.1136/bjo.78.12.921
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发表时间:
1994
影响因子:
4.1
通讯作者:
Max Cynader
Max Cynader
中科院分区:
医学2区
文献类型:
--
作者:
Zheng Chen;Shiv Prasad;Max Cynader

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使用有效的TxA 2特异性激动剂,125-碘化5-庚烯酸7-[3-[3-羟基-4-[4-羟基-5-庚烯酸]-1-基]-1,3-二氢-1,3-二氧杂环戊烯-1-基]-1,3-二氢-1,3-二氧杂环戊烯-1-基]-1,3-二氢-1,4-二氧杂环戊烯-1-基]-1,3-二氢-1,4-二氧杂环戊烯-1-基]-1,3-二氢-1,3-二氢-1,4-二氢-1,3-二氢-1,3-二氢-(碘-125 I)苯氧基]-1-丁烯基]-7-氧杂双环[2.2.1]庚-2-基]-,[1 S-[1a,2a,(Z),3B(1 E,3S*),4a]]-C23 H29 IO 5(125 I-BOP)。TxA 2受体集中在眼组织内的几个特定位点,包括角膜上皮、睫状突、视网膜和睫状后动脉。此外,我们还用原位杂交的方法观察了TxA_2受体mRNA的分布。受体结合位点的分布与受体mRNA的分布密切相关。这些研究采用了不允许细胞分辨率的胶片放射自显影术。为了获得增强的细胞分辨率和更详细的信息的受体及其相应的mRNA的定位,乳液放射自显影后,配体结合和原位杂交。该方法进一步表明,TxA 2受体主要集中在睫状突的非色素上皮细胞上、视网膜内的光感受器上和睫状后动脉的内皮细胞上。这些结果可能有助于了解TxA 2在人眼中的病理生理作用。
Thromboxane A2 (TxA2) receptors in human eye sections were identified and localised using a potent TxA2 specific agonist, 125-iodinated 5-heptenoic acid 7-[3-[3-hydroxy-4-[4-(iodo-125I) phenoxy]-1-butenyl]-7- oxabicyclo[2.2.1]hept-2-yl]-,[1S-[1a,2a,(Z),3B(1E,3S*),4a]]-C23 H29 IO5 (125I-BOP) in a binding assay. TxA2 receptors were concentrated in several specific loci within ocular tissues, including the corneal epithelium, the ciliary processes, retina, and posterior ciliary arteries. In addition, we have used the method of in situ hybridisation to observe the distribution of TxA2 receptor mRNA. The distributions of both receptor binding sites and receptor mRNAs showed a close correlation. These studies employed film autoradiography which does not permit cellular resolution. In order to obtain enhanced cellular resolution and more detailed information about the localisation of the receptors and their corresponding mRNAs, emulsion autoradiography was used after ligand binding and in situ hybridisation. This approach showed further that TxA2 receptors are mainly concentrated on non-pigmented epithelial cells of the ciliary processes, on photoreceptors within the retina, and on endothelial cells of the posterior ciliary arteries. These results may be helpful for understanding the pathophysiological effects of TxA2 in the human eye.
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DOI: --
发表时间: 1985
影响因子: 3.6
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DOI: --
发表时间: 1992
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
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