Role of Cytochrome Modulators in Altering the Occurrence of Cataract in Rats
Background: Cataract is one of the primary causes of blindness all over the world. It indicates the onset of secondary complications of diabetes. The only treatment available is surgery as there are no satisfactory drugs which can prevent or retard the initiation and maturation of cataract. It w...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2015-07-01
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| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://jcdr.net/articles/PDF/6216/12411_CE[Ra1]_F(AK)_PF1(PAK)_PFA(AK)_PF2(PAG).pdf |
| Summary: | Background: Cataract is one of the primary causes of
blindness all over the world. It indicates the onset of secondary
complications of diabetes. The only treatment available is surgery
as there are no satisfactory drugs which can prevent or retard
the initiation and maturation of cataract. It was hypothesized that
cytochrome P 450 (CYP) inducers or inhibitors can modify the
cataract occurrence by accelerating or delaying the occurrence
of cataract respectively.
Objective: To study the effect of two commonly used drugs,
phenytoin (CYP inducer) and ciprofloxacin (CYP inhibitor) on
the initiation and maturation of cataract with the galactoseinduced cataract model.
Materials and Methods: The experiment was conducted in 24
new born male Wistar rats. Cataract formation was induced with
a 50% galactose diet. The rats were randomized into four groups
of 6 rats each: Group 1 rats received a normal diet; Group 2, 3 and
4 rats received 50% galactose diet day 23 onwards. In addition,
Group 3 rats were pre-treated with ciprofloxacin (20mg/kg) and
Group 4 rats were pre-treated with phenytoin (50mg/kg) day
18 onwards once a day orally. The appearance of cataract was
checked daily with an ophthalmoscope. The maturation pattern
was examined using Fundus Fluorsen Angiographer (FFA). The
cataract was graded according to Sippel's classification. The
experimental and control groups were compared by chi square
test and the results were considered significant at p< 0.05.
Results: The initiation of cataract was significantly delayed
with ciprofloxacin as compared to galactose; however, there
was no difference in the maturation pattern of cataract in both
the groups. In spite of being a CYP inducer, the initiation of
cataract was not accelerated in phenytoin group. Rather, it was
significantly delayed and the cataract did not progress to stage
5 even on 30th day of galactose administration
Conclusion: CYP450 modulators have a significant effect on the
initiation of cataract without significantly altering the maturation
pattern. It is not reasonable to extrapolate the results of one
enzyme inhibitor or inducer to other CYP modulators. Hence,
further studies are needed to identify the pharmacological
profile of various CYP modulators on the occurrence of
cataractogenesis. |
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| ISSN: | 2249-782X 0973-709X |