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Mendlewicz, J. et al.

Mendlewicz, Oswald, Claes, Massat, Souery, Van Broeckhoven, Del-Favero,

Patient-control association study of substance P-related genes in unipolar and bipolar affective disorders.

In the search of genes potentially implicated in the aetiology of affective disorders (AD), SUBSTANCE P ( SP) pathway is receiving increased interest. SP receptor antagonists, such as MK-869 and L-759274, have been shown to have antidepressant effect. Results from preclinical and human studies implicate SP and its pathway in the pathophysiology of mood disorders. We investigated a possible association between 20 single nucleotide polymorphisms (SNPS) among four SP-related genes and unipolar and bipolar ad (UPAD and BPAD) in a first sample of 92 UPAD patients and 92 control individuals and in a replication sample of 92 UPAD patients and 92 control individuals. An additional sample of 113 BPAD patients has also been ascertained. Our results showed a significant association between the angiotensin-converting enzyme gene (ACE1) and UPAD in our first sample, but not in the replication sample. No significant evidence of association was found in other SP-related genes. We did not find any association in the BPAD sample. When pooling first and replication UPAD samples, an association was found between ACE1 and a subgroup of patients remaining depressed after an adequate antidepressant treatment. In conclusion, our findings do not support a major contribution of SP-related genes in UPAD and BPAD, but provides some evidence of an ace influence in treatment response to antidepressants.[1]

References

Patient-control association study of substance P-related genes in unipolar and bipolar affective disorders. Mendlewicz, J., Oswald, P., Claes, S., Massat, I., Souery, D., Van Broeckhoven, C., Del-Favero, J. Int. J. Neuropsychopharmacol. (2005) [Pubmed]

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