Is Ankyrin a genetic risk factor for psychiatric phenotypes?

Area of Science:

• Genetics
• Psychiatry
• Neuroscience

Background:

• Genome-wide association studies identified ANK3 single nucleotide polymorphisms (SNPs) as risk factors for bipolar disorder and schizophrenia.
• The role of ANK3 in common susceptibility genes for schizophrenia and bipolar disorder remains debated.

Purpose of the Study:

• To investigate the association of ANK3 gene variants with schizophrenia, bipolar disorder, and unipolar depression.
• To clarify the specific genetic contribution of ANK3 to these psychiatric conditions.

Main Methods:

• Genotyped three ANK3 SNPs (rs9804190, rs10994336, rs10761482) in a German case-control sample.
• Included 920 schizophrenia, 400 bipolar disorder, 220 unipolar depression patients, and 480 healthy controls.
• Analyzed associations considering Leonhard's classification for disease entities.

Main Results:

• No association was found for rs9804190 and rs10994336 with bipolar disorder, unipolar depression, or schizophrenia.
• SNP rs10761482 showed a significant association with bipolar disorder (p = 0.015), but not with schizophrenia or unipolar depression.
• No associations were observed with disease entities based on Leonhard's classification.

Conclusions:

• The findings support a specific genetic role of ANK3 in bipolar disorder.
• The study failed to replicate previous findings linking ANK3 to schizophrenia.
• ANK3 is not confirmed as a common risk factor for schizophrenia, bipolar disorder, and unipolar depression.