Pharmacokinetic and Pharmacodynamic Evaluation of the Anti-cataract Effect of Eye Drops Containing Disulfiram and Low-Substituted Methylcellulose Using ICR/f Rats as a Hereditary Cataract Model
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概要
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We attempted to develop anti-cataract eye drops using disulfiram (DSF) and low-substituted methylcellulose (MC), and evaluated their anti-cataract effect in terms of the lens opacification vs. age-profile curves using a one-exponential equation. The eye drops were prepared using 0.5% DSF and 2% MC (DSF eye drops), and ICR/f rats, a recessive-type hereditary cataractous strain, were used as the experimental model. Gelation of DSF eye drops containing MC was first observed at about 35°C, close to body temperature. In in vivo transcorneal penetration experiments using rabbit corneas, only diethyldithiocarbamate (DDC) was detected in the aqueous humor, while DSF was not detected. The DDC penetration level of DSF eye drops containing MC was approximately 1.3-fold higher than that of DSF eye drops. The opacification rate constant (k) of ICR/f rat instilled with DSF eye drops with or without MC was lower, and the initial time of opacification (τ) was longer than those of ICR/f rats instilled with saline. Furthermore, the k of ICR/f rats instilled with DSF eye drops with MC was lower than that of ICR/f rats instilled with DSF eye drops without MC. In conclusion, the analysis of kinetic parameters including k and τ using a one-exponential equation provided useful information for clarifying the anti-cataract effect of eye drops. ICR/f rats instilled with DSF eye drops using a low-substituted MC-based drug delivery system demonstrated a delay in cataract development, probably resulting from an increase in the retention of DSF eye drops on the cornea.
著者
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Ito Yoshimasa
Faculty Of Pharmaceutical Sciences Kinki University
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Nagai Noriaki
Faculty of Pharmacy, Kinki University
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Takeuchi N
Meijo Univ. Nagoya Jpn
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Takeuchi Noriko
Section Of Biochemistry Faculty Of Pharmacy Meijo University
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Ito Yoshimasa
Faculty of Pharmacy, Kinki University
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