Creatine kinase BB in brain in schizophrenia

Area of Science:

• Neuroscience
• Biochemistry

Background:

• Creatine kinase (CK) plays a crucial role in maintaining brain energy metabolism via the creatine/creatine phosphate system.
• Alterations in brain creatine levels have been implicated in the pathophysiology of schizophrenia.

Purpose of the Study:

• To comparatively assess creatine kinase (CK) enzymatic activity and CK BB immunoreactivity in specific brain regions of individuals with schizophrenia versus healthy controls.
• To investigate potential causes and consequences of observed changes in CK BB levels in schizophrenia.

Main Methods:

• Enzymatic activity of CK was measured using a commercial diagnostic kit.
• CK BB immunoreactivity was evaluated using ECL-immunoblotting with monoclonal antibodies.
• CK BB was purified from brain extracts for comparative yield analysis.

Main Results:

• A significant reduction (p<0.01) in both CK activity and CK BB immunoreactivity was found in all examined brain areas of schizophrenia patients compared to controls.
• The most pronounced decrease was observed in the cerebellum.
• This reduction was independent of patient age, postmortem interval, or chlorpromazine equivalent dosage.
• Purification yield of CK BB was significantly lower in schizophrenia brains, indicating reduced protein levels.

Conclusions:

• Brain creatine kinase (CK) BB levels are markedly decreased in schizophrenia patients.
• This decrease affects multiple brain regions and is not influenced by confounding factors like age or medication.
• The findings suggest a potential role for CK BB dysfunction in schizophrenia pathophysiology.