申请人:Konishi Yasuo
公开号:US20110060045A1
公开(公告)日:2011-03-10
The invention disclosed relates to the use of anti-glycation agents of formula (I),
wherein
X represents NR
7
, wherein R
7
represents hydrogen atom or an acyl group derived from a linear, branched or cyclic C
1-10
aliphatic acid or a C
6-10
aromatic acid,
R
1
represents hydrogen atom, NH
2
, or a linear, branched or cyclic C
1-10
alkyl which may be substituted with a C
6-10
aromatic group,
R
2
represents hydrogen atom, a linear, branched or cyclic C
1-10
alkyl, or COOH group,
R′
2
represents hydrogen atom or a linear, branched or cyclic C
1-10
alkyl group,
R
3
represents hydrogen atom, ═O, OR
8
, SR
8
, or NR
8
R
9
, wherein R
8
and R
9
represent hydrogen atom, a linear, branched or cyclic C
1-10
alkyl, or an acyl group derived from a linear or branched C
1-10
aliphatic acid or a C
6-10
aromatic acid, provided that R
8
and R
9
are not both an acyl group,
R
4
and R
5
each independently represents OH, NH
2
, or SH,
R
6
represents hydrogen, F, Cl, Br, I, OR
10
, or SR
10
, wherein R
10
represents hydrogen or an acyl group derived from a linear or branched C
1-10
aliphatic acid or a C
6-10
aromatic acid, R
6
may be present more than once and each R
6
may be the same or different, a physiologically tolerated salt, prodrug, physiologically functional derivative or mixture thereof, such as (S)-isoproterenol, and its prodrug, (S)-isoproterenol dipivalate hydrochloride on the initiation of diabetic cataracts. (S)-Isoproterenol is a strong anti-glycation agent with an in vitro IC
50
value of 16.8±0.8 μM. (S)-isoproterenol dipivalate hydrochloride was prepared in eye drop form at 0.1% concentration and was applied to diabetic rats twice a day up to 30 weeks. No cataract was observed in non-diabetic rats with or without treatment of the prodrug. In diabetic rats without treatment of the prodrug (group III), 88% of eyes got cataract at 8.6±1.5 weeks. In diabetic rats with treatment of the prodrug, only 53% of the eyes initiated cataract at 8.6±1.2 weeks, and the remaining 26% of the eyes prolonged the initiation to 17.1±3.1 weeks. Furthermore, no cataract was observed in 21% of the eyes even at 30 weeks.