Effect of oral administration of Lactobacillus casei on alloxan‐induced diabetes in mice

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Abstract
The effects of Lactobacillus casei (LC) on the onset of alloxan (AXN)‐induced diabetes in 7‐week‐old BALB/c mice were examined. It was observed that the mice given a diet containing 0.1% or 0.05% LC or orally administered LC showed significantly decreased incidence of diabetes induced by intravenous injection of AXN and that the plasma glucose level was slightly lower than that in the control group. The body weight in the LC‐treated groups was higher than that in the control group, although the food intake weights were almost the same. Pathological analysis revealed that the AXN‐induced disappearance of insulin‐secreting β‐cells in the islets of Langerhans was strongly inhibited in the LC‐treated groups. It was also shown that the serum nitric oxide level was maintained at a normal level in LC‐treated mice, whereas the level in the control group was increased by AXN administration. Taken together, these findings suggest that oral administration of LC to AXN‐treated BALB/c mice contributed to the reduction of diabetes and the increase in plasma glucose level.