Plasma corticosterone concentrations in diabetic (db) mice

Area of Science:

• Endocrinology
• Genetics
• Metabolic Disorders

Background:

• The obese (ob) mouse model exhibits similar phenotypic traits to diabetic (db) mice.
• Hyperadrenocorticism is observed in various metabolic conditions.

Purpose of the Study:

• To investigate plasma corticosterone concentrations in diabetic (db) mice.
• To compare corticosterone levels between diabetic mice and normal controls.
• To determine if hyperadrenocorticism in db mice is linked to primary gene action or secondary to obesity-diabetes.

Main Methods:

• Measurement of plasma corticosterone levels.
• Comparison between diabetic (db) mice and normal control mice.
• Utilizing two different inbred backgrounds for db mice.

Main Results:

• Plasma corticosterone concentrations were significantly elevated in diabetic (db) mice compared to normal controls.
• The observed elevation in corticosterone is comparable to that seen in obese (ob) mice.
• Hyperadrenocorticism is not directly caused by the primary genes responsible for diabetes or obesity.

Conclusions:

• Elevated corticosterone in diabetic mice is a consequence of the obesity-diabetes syndrome.
• Hyperadrenocorticism is a secondary effect of developing metabolic dysfunction.
• These findings differentiate the cause of hyperadrenocorticism from the primary genetic mutations.