Functional polymorphism of matrix metalloproteinase-9 (MMP9) gene is not associated with schizophrenia and with its...

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Schizophrenia is categorized into deficit and non-deficit subtypes, potentially representing distinct pathophysiological entities.
• Matrix metalloproteinase-9 (MMP-9) is implicated in synaptic plasticity, learning, and memory.
• The MMP-9 -1562C/T gene polymorphism is a functional variant potentially influencing MMP-9 activity.

Purpose of the Study:

• To investigate the association between the MMP-9 -1562C/T gene polymorphism and the deficit and non-deficit subtypes of schizophrenia.
• To determine if this genetic polymorphism differentiates schizophrenia subtypes from each other and from healthy controls.

Main Methods:

• A case-control study involving 468 schizophrenia patients (189 non-deficit, 279 deficit) and 532 healthy controls of Polish descent.
• Diagnosis of deficit schizophrenia was confirmed using the SDS (Symptomالدلالة Scale).
• MMP-9 -1562C/T gene polymorphism was genotyped using the fluorescence resonance energy transfer (FRET) method on the Light Cycler System 2.0.

Main Results:

• No significant differences in genotype or allele frequencies of the MMP-9 -1562C/T polymorphism were observed between schizophrenia patients and the control group.
• The deficit and non-deficit schizophrenia subgroups did not differ in their genotype or allele frequencies for this polymorphism.
• No significant differences were found when comparing deficit patients to controls, or non-deficit patients to controls.

Conclusions:

• The study found no evidence to support an association between the functional MMP-9 -1562C/T gene polymorphism and the deficit or non-deficit subtypes of schizophrenia.
• These findings suggest that the investigated MMP-9 polymorphism is unlikely to be a genetic marker for schizophrenia subtypes in the studied population.