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Kleine-Levin syndrome is associated with birth difficulties and genetic variants in the TRANK1 gene loci

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Ambati, Aditya | Hillary, Ryan | Leu-Semenescu, Smaranda | Ollila, Hanna | Lin, Ling | During, Emmanuel | Farber, Neal | Rico, Thomas | Faraco, Juliette | Leary, Eileen | Goldstein-Piekarski, Andrea | Huang, Yu-Shu | Han, F. | Sivan, Yakov | Lecendreux, Michel | Dodet, Pauline | Honda, Makoto | Gadoth, Natan | Nevsimalova, Sona | Pizza, Fabio | Kanbayashi, Takashi | Peraita-Adrados, Rosa | Leschziner, Guy | Hasan, Rosa | Canellas, Francesca | Kume, Kazuhiko | Daniilidou, Makrina | Bourgin, Patrice | Rye, David | Vicario, José | Hogl, Birgit | Hong, Seung Chul | Plazzi, Guiseppe | Mayer, Geert | Landtblom, Anne Marie | Dauvilliers, Yves | Arnulf, Isabelle | Mignot, Emmanuel Jean-Marie

Edité par CCSD ; National Academy of Sciences -

International audience. Significance Genetic markers in TRANK1 gene and its vicinity have been weakly associated with bipolar disorder and schizophrenia (10% increased risk). We found that the same polymorphisms are associated with Kleine-Levin syndrome (50% increased risk), a rare sleep disorder characterized by recurrent episodes of severe hypersomnia and cognitive abnormalities. Response to lithium treatment is suggestive of a pathophysiological overlap between KLS and bipolar disorder. The study also shows that variants in the TRANK1 gene region may predispose to KLS when patients have had a difficult birth, suggesting that TRANK1 gene region modulates newborns’ response to brain injury, with consequences for mental and neurological health in adulthood. Another possibility may be that the polymorphism impacts birth and KLS.

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