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Updated: May 22, 2026
07:26
Assessment of Stress Effects on Cognitive Flexibility using an Operant Strategy Shifting Paradigm
Published on: May 4, 2020
[Schizophrenia and carbonyl stress]
Makoto Arai1, Mitsuhiro Miyashita, Tomoe Ichikawa
1Tokyo Metropolitan Institute of Medical Science, Department of Psychiatry and Behavioral Sciences, Project for Schizophrenia & Affective Disorders Research.
Summary
Schizophrenia patients show abnormal Glyoxalase I (GLO1) enzyme function, leading to increased pentosidine and decreased Vitamin B6 levels. This discovery may reveal new therapeutic targets for schizophrenia treatment.
Area of Science:
- Biochemistry
- Neuroscience
- Genetics
Background:
- Glyoxalase I (GLO1) enzyme is crucial for detoxifying reactive carbonyl compounds.
- Impaired GLO1 function causes carbonyl stress and advanced glycation end product (AGE) formation, such as pentosidine.
- Schizophrenia is a complex psychiatric disorder with potential biochemical underpinnings.
Purpose of the Study:
- To investigate genetic abnormalities in Glyoxalase I (GLO1) in schizophrenia patients.
- To examine the biochemical consequences of GLO1 impairment in this population.
- To explore potential links between GLO1 function, AGEs, and Vitamin B6 levels in schizophrenia.
Main Methods:
- Analysis of genetic abnormalities in the GLO1 gene.
- Measurement of plasma pentosidine levels.
- Assessment of pyridoxal (a form of Vitamin B6) levels in schizophrenia patients.
Main Results:
- Seventeen schizophrenia patients (17.4%) exhibited elevated plasma pentosidine levels without physical complications.
- A significant decrease in pyridoxal levels was observed in schizophrenia patients.
- Evidence of genetic abnormalities in GLO1 was found in the studied schizophrenia population.
Conclusions:
- This study provides the first evidence of GLO1 genetic abnormalities and associated biochemical derangements in schizophrenia.
- Elevated pentosidine and reduced pyridoxal levels suggest a role for carbonyl stress in schizophrenia pathophysiology.
- Further metabolomic and clinical studies could lead to novel therapeutic strategies for schizophrenia.
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