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Effects of L-lysine Monohydrochloride on Insulin and Blood Glucose Levels in Spinal Cord Injured Rats

Effects of L-lysine Monohydrochloride on Insulin and Blood Glucose Levels in Spinal Cord Injured Rats

Tian-ling Zhang, Yu-wu Zhao, Xue-yuan Liu, Su-ju Ding

Chin Med J (Engl). 2010 Mar 20;123(6):722-5.

PMID: 20368093

Abstract:

Background:
Hyperglycemia in brain and spinal cord could aggravate neurologic impairment. Recent studies showed that L-lysine monohydrochloride (LMH) could increase the insulin secretion and regulate the blood glucose level. The aim of the present study was to investigate the effects of LMH on pancreatic islet B cells, the levels of endogenous insulin and blood glucose in spinal cord injured rats.
Methods:
Forty male Wistar rats were divided into four groups, namely, normal control group, model group, high-dose LMH group (621.5 mg/kg equal to LMH 1/8 LD50), and low-dose LMH group (310.8 mg/kg equal to LMH 1/16 LD50). The model of spinal cord injured rat was established by hemi-transection at the lower right thoracic spinal cord. LMH was administered via intraperitoneal injection once spinal cord injury was produced in rats. All rats were sacrificed 48 hours after spinal cord injured. The effects of LMH on pancreatic islet B cells, the content of endogenous insulin, and the level of blood glucose were observed with immunohistochemical method, radioimmunoassay method, and biochemical analyzer, respectively.
Results:
The insulin immunohistochemical intensities of islet B cells were significantly weaker in model group than those in normal control group (P < 0.01). The levels of endogenous insulin were significantly lower and the blood glucose levels were significantly higher in model group than those in normal control group (P < 0.01). The insulin immunohistochemical intensities of islet B cells were significantly stronger in high-dose LMH group than those in model group (P < 0.05). In addition, we found that the levels of endogenous insulin were significantly higher and the blood glucose levels were significantly lower in high-dose LMH group than those in model group (P < 0.05). There were no significant differences in the insulin immunohistochemical intensities of islet B cells, the levels of endogenous insulin and the blood glucose between low-dose LMH group and model group (P > 0.05).
Conclusion:
LMH, but dose-dependent, might participate in the regulation of pancreatic islet B cells, and then reduce the blood glucose levels in the spinal cord injured rats.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP657272-A	L-Lysine monohydrochloride		657-27-2	Price

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