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Title
DEDICATION
CERTIFICATE
DECLARATION
ACKNOWLEDGEMENT
CONTENTS
1. Introduction and Review of Literature
Risk Factors
Sugar Cataracts
Sunlight and UV Cataract
lonising Radiation and Cataract
Smoke, Smoking and Cataract
Nutritional Status and Cataract
Diarrhoea and Cataract
Blood Pressure and Cataract
Toxic Chemicals, Drugs, Medical Treatments and Cataract
Trace Elements and Cataract
Selenium and the Living World
Selenite Cataract
2. Materials and Methods
Part l. Cataractogenic Potency of Sodium Selenite
Age-Dependent Effects
Dosage-Dependent Effect
Anti-Cataractogenic Potency of Vitamin-E
Part II. Histomorphological Studies
Cataract Induction
Light Microscopy
Materials needed
Procedure
Staining Method (Haemotoxylin-Eosin)
Scanning Electron Microscopy
Materials Needed
Procedure
Part Ill. Biochemical Studies
Estimation of Protein
Estimation of Glutathione
Estimation of Sulfhydryl Groups
Estimation of Total Sutfhydryl Groups (TSH)
Estimation of Non-Protein Sutfhydryl Groups (NPSH)
Determination of Protein Bound Sulfhydryl Groups (PSH)
Estimation of Ascorbic Acid
Estimation of Nucleic Acids
Estimation of Ribonucleic Acid (RNA)
Estimation of Deoxyribonucleic Acid (DNA)
Estimation of Glucose
Estimation of Fructose
Estimation of Thiobarbituric Acid (TBA) Reactive Material or Malondialdehyde (MDA)
Determination of Potassium and Sodium
Determination of Calcium and Magnesium
Assay of Adenosine Triphosphatase (ATPase) (E.C. 3.6.1.3) Activity
Determination of Inorganic Phosphate
Assay of Acid Phosphatase (ACP) (E.C.3.1.3.2)
Assay of Glucose-6-Phosphate Dehydrogenase (G-6-PDH) (E.C.1.1.1.49) Activity
Assay of Succinic Dehydrogenase (SDH) (E.C.1.3.98.1) Activity
Assay of y-Glutamyl Cysteine Synthetase (y-GCS) (E.C.6.3.2.2)
Assay of Glutathione Reductase (GSH-R) (NADPH: OxidisedGlutathione Oxidoreductase) (E.C.1.6.4.2)
Determination of Water Contents
Statistical Analysis
Part lV. Electrophoretic Studies
Sodium Dodecyl Sulphate Polyacrylamide Gel Electrophoresis (SDS PAGE)
Preparation of Slab Gels
Sample Preparation and Sample Loading
Silver Staining Method
3. Observation and Results
Part l. Cataractogenic Potency of Sodium Selenite
Age-Dependent Effect
Dosage-Dependent Effect
Anti-Cataractogenic Potency of Vitamin-E
Table 1. Cataractogenic potency of sodium selenite with multiple low (chronic) dosages in different age groups (age-dependent effect)
Table 2. Cataractogenic potency of sodium selenite with multiple and single high (acute) dosages in different age groups (age-dependent effect)
Table 3. Cataractogenic potency of sodium selenite with multiple low (chronic) dosages in 8 day post partum rat pups (dosage-dependent effect)
Table 4. Cataractogenic potency of sodium selenite with multiple and single high (acute) doses in 10 day post partum rat Pups (dosage-dependent effect)
Table 5. Proportionality of minimum dosage requirement of sodium selenite to produce cataract with low (chronic) and high (acute) dosages
Table 6. Anti-cataractogenic potency of vitamin-E
Part II. Histomorphological Studies
Light Microscopy
Scanning Electron Microscopy
Diagrammatic representation of the anterio-posterior section of the lens
Plate I. Photographs of nuclear cataract produced by multiple low dosage group and the vitamin-E treated lenses
Plate II. Wotographs of different stages of cataract produced by acute high dosage groups
Plate III. Light Microscopy
Plate IV. Light Microscopy
Plate V. Light Microscopy
Plate VI. Scanning Electron Microscopy
Plate VII. Scanning Electron Microscopy
Plate VIIl. Scanning Electron Microscopy
Plate IX. Scanning Electron Microscopy
Plate X. Light Microscopy
Plate XI. Scanning Electron Microscopy
Part Ill. Biochemical Studies
Protein
Glutathione
Sulfhydryl Groups
Ascorbic Acid
DNA and RNA
Glucose and Fructose
Thiobarbituric Acid Reactive Material (Malondialdehyde)
Sodium, Potassium, Magnesium and Calcium
Adenosine Triphosphatase
Acid Phosphatase
Glucose-6-Phosphate Dehydrogenase
Succinic Dehydrogenase
y-Glutamyl Cysteine Synthetase
Glutathione Reductase
Lens Weight and Water Contents
Part IV. Electrophoretic Studies
Plate XII. SDS PAGE
Plate XIII. SDS PAGE
Plate XIV. SDS PAGE
4. Discussion
Part l. Cataractogenic Potency of Sodium Selenite
Age-Dependent Effect
Dosage-Dependent Effect
Anticataractogenic Potency of Vitamin-E
Part II. Histomorphological Studies
Light Microscopy
Scanning Electron Microscopy
Part Ill. Biochemical Studies
Proteins
Glutathione
Sulfhydryl Groups
Ascorbic Acid
DNA and RNA
Glucose and Fructose
Malondialdehyde
Sodium, Potassium, Magnesium and Calcium
Adenosine Triphosphatases
Acid Phosphatase
Glucose 6-Phosphate Dehydrogenase
Succinic Dehydrogenase
y-Glutamyl Cysteine Synthetase
Glutathione Reductase
Lens Weight and Water Content
Part IV. Electrophoretic Studies
5. Summary and Conclusion
BIBILIOGRAPHY