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Role of methionine-enkephalin on the regulation of carbohydrate metabolism in the rice field crab Oziotelphusa senex senex
Methionine-enkephalin’s role in controlling sugar metabolism in the rice field crab
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Abstract
Bilateral eyestalk ablation significantly decreased haemolymph sugar levels.
- Injection of eyestalk extract into ablated crabs significantly increased haemolymph sugar levels.
- Eyestalk ablation led to increased total carbohydrate and glycogen levels in hepatopancreas and muscle, along with decreased phosphorylase activity.
- Injection of eyestalk extract into ablated crabs resulted in partial or complete reversal of changes in carbohydrate and glycogen levels.
- Methionine-enkephalin injection in intact crabs significantly increased haemolymph sugar levels in a dose-dependent manner.
- After methionine-enkephalin injection, total tissue carbohydrate and glycogen levels significantly decreased in intact crabs, with increased phosphorylase activity.
- Methionine-enkephalin did not affect haemolymph sugar or tissue levels in eyestalk-ablated crabs.
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