Breakdown of the blood-ocular barrier as a strategy for the systemic use of nanosystems.

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Occhiutto ML, Freitas FR, Maranhao RC, Costa VP

Breakdown of the blood-ocular barrier as a strategy for the systemic use of nanosystems.

Pharmaceutics. 2012 May 14;4(2):252-75. doi: 10.3390/pharmaceutics4020252.

PubMed ID
24300231 [ View in PubMed
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Abstract

Several drug delivery systems have been proposed to overcome physiological barriers, improving ocular bioavailability. Systemic routes are seldom used due to the blood-ocular barrier. Novel drug delivery systems based on nanotechnology techniques have been developed to overcome ocular physiological barriers. This non-systematic review suggests the utilization of a transitory blood-ocular breakdown to allow the access of drugs by nanotechnology drug delivery systems via the systemic route. We discuss the possible ways to cause the breakdown of the blood-ocular barrier: acute inflammation caused by intraocular surgery, induced ocular hypotony, and the use of inflammatory mediators. The suitability of use of the systemic route and its toxic effects are also discussed in this article.

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