Significant rise in plasma insulin after electroconvulsive therapy

Area of Science:

• Neuroscience
• Psychiatry
• Endocrinology

Background:

• Schizophrenia is a complex mental disorder.
• Electroconvulsive therapy (ECT) is a treatment for severe mental illness.
• The metabolic effects of ECT, particularly on insulin, are not fully understood.

Purpose of the Study:

• To investigate the acute effects of electroconvulsive therapy (ECT) on plasma insulin levels in patients with schizophrenia.
• To determine the temporal profile of insulin level changes following ECT.
• To explore potential correlations between the ordinal position of ECT treatments and insulin response.

Main Methods:

• Five patients diagnosed with schizophrenia (DSM III) underwent 10 single ECT sessions.
• ECT treatments were administered at early, middle, and late ordinal positions.
• Plasma insulin levels were measured at 10, 20, 30, and 60 minutes post-ECT.

Main Results:

• A significant increase in insulin plasma levels was observed at 10, 20, and 30 minutes after effective electrical stimulation.
• Insulin levels returned to baseline by 60 minutes post-ECT in all patients.
• The initial rise in insulin at 10 minutes was consistent across all treatment positions.
• A positive correlation was noted: higher ordinal positions of ECT treatments corresponded to higher peak insulin levels.

Conclusions:

• Electroconvulsive therapy acutely elevates plasma insulin levels in schizophrenia patients.
• The insulin response to ECT is transient, normalizing within an hour.
• The cumulative effect of repeated ECT sessions may influence the magnitude of insulin release.