TY - JOUR
T1 - HIGH OSMOLARITY EFFECT OF INTRAVITREAL PLASMIN ENZYME ON RABBIT RETINA
AU - Asami, Tetsu
AU - Kachi, Shu
AU - Mohamed, Usama Ali
AU - Ito, Yasuki
AU - Terasaki, Hiroko
N1 - Funding Information:
The authors thank to Professor Duco Hamasaki of the Bascom Palmer Eye Institute of the University of Miami for his critical discussion and final manuscript revision. This work was supported by JSPS KAKENHI Grant Number 13307048, No.14370557, No.14370556 and No. B 19791262.
Publisher Copyright:
© 2015. All Rights Reserved.
PY - 2015
Y1 - 2015
N2 - We conducted a study of the effect of intravitreal plasmin on retinal thickness in rabbits. Forty rabbit eyes were injected with 0.4, 1, 2, and 5 IU of plasmin (8 eyes/group). The same volume of BSS-plus® was injected in control eyes. Four eyes in each group underwent vitrectomy 60 minutes after the injections. The retinal thickness was measured in optical coherence tomographic (OCT) images before, 30 minutes, and 1 week after the injection. To study the effect of hyperosmolarity, 4 eyes received an injection of mannitol solution whose osmolarity was the same as the plasmin solutions. Thirty minutes after the plasmin injection, 4 eyes developed a serous retinal detachment (SRD). The mean retinal thickness including SRD was increased at 30 minutes in a dose-dependent way. The increase in eyes with 5 IU of plasmin was significantly greater than that in eyes with BSS-Plus® or 0.4 IU of plasmin (P = 0.0266, P = 0.0371, respectively). One week after the injection, SRD disappeared, and the mean retinal thickness decreased. The eyes injected with mannitol, the same osmolarity of 1, 2, 5 IU of plasmin, developed SRD at 30 minutes, and it disappeared after 1 week in all eyes. The results of this study demonstrated that an intravitreal injection of plasmin increases the retinal thickness in a dose-dependent way in rabbit eyes. The results with mannitol suggest that the increase in retinal thickness following plasmin is most likely caused by the hyperosmolarity of plasmin solution.
AB - We conducted a study of the effect of intravitreal plasmin on retinal thickness in rabbits. Forty rabbit eyes were injected with 0.4, 1, 2, and 5 IU of plasmin (8 eyes/group). The same volume of BSS-plus® was injected in control eyes. Four eyes in each group underwent vitrectomy 60 minutes after the injections. The retinal thickness was measured in optical coherence tomographic (OCT) images before, 30 minutes, and 1 week after the injection. To study the effect of hyperosmolarity, 4 eyes received an injection of mannitol solution whose osmolarity was the same as the plasmin solutions. Thirty minutes after the plasmin injection, 4 eyes developed a serous retinal detachment (SRD). The mean retinal thickness including SRD was increased at 30 minutes in a dose-dependent way. The increase in eyes with 5 IU of plasmin was significantly greater than that in eyes with BSS-Plus® or 0.4 IU of plasmin (P = 0.0266, P = 0.0371, respectively). One week after the injection, SRD disappeared, and the mean retinal thickness decreased. The eyes injected with mannitol, the same osmolarity of 1, 2, 5 IU of plasmin, developed SRD at 30 minutes, and it disappeared after 1 week in all eyes. The results of this study demonstrated that an intravitreal injection of plasmin increases the retinal thickness in a dose-dependent way in rabbit eyes. The results with mannitol suggest that the increase in retinal thickness following plasmin is most likely caused by the hyperosmolarity of plasmin solution.
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U2 - 10.18999/NAGJMS.77.1-2.245
DO - 10.18999/NAGJMS.77.1-2.245
M3 - Article
AN - SCOPUS:85082848470
SN - 0027-7622
VL - 77
SP - 245
EP - 252
JO - Nagoya journal of medical science
JF - Nagoya journal of medical science
IS - 1-2
ER -