BACKGROUND: The ADARB1 gene is located in 21q22.3 region, previously linked to familial bipolar disorder, and its product has a documented action in the editing of the pre-mRNA of glutamate receptor B subunit. Dysfunction of glutamatergic neurotransmission could play an important role in the pathophysiology of bipolar disorder (BD). Glutamate excitatory neurotransmission regulation is a possible mechanism of the initial effect of anticonvulsants in regulating mood. METHODS: To investigate the hypothesis of an involvement of ADARB1 gene in the BD, the ADARB1 cDNA has been cloned and sequenced in seven selected bipolar I disorder patients with evidence of familiarity of mood disorders. A detailed investigation of the gene nucleotide sequence in the open reading frame has been performed. RESULTS: No alteration in the sequence of the ADARB1 gene cDNA was found in any patient, except a common neutral polymorphism in three out of seven patients. CONCLUSIONS: Mutations in ADARB1 gene are not commonly associated with bipolar I disorder, therefore other genes in the 21q22 region could be associated with bipolar illness in some families, likely in the context of a multifactorial transmission model.

Sequence analysis of ADARB1 gene in patients with familial bipolar disorder

STRIPPOLI, PIERLUIGI;VITALE, LORENZA;CASADEI, RAFFAELLA;FRABETTI, FLAVIA;CANAIDER, SILVIA;LENZI, LUCA;D'ADDABBO, PIETRO;CARINCI, PAOLO;TORRONI, ARIANNA;FERRARI, GIUSEPPE;ZANNOTTI, MARIA
2004

Abstract

BACKGROUND: The ADARB1 gene is located in 21q22.3 region, previously linked to familial bipolar disorder, and its product has a documented action in the editing of the pre-mRNA of glutamate receptor B subunit. Dysfunction of glutamatergic neurotransmission could play an important role in the pathophysiology of bipolar disorder (BD). Glutamate excitatory neurotransmission regulation is a possible mechanism of the initial effect of anticonvulsants in regulating mood. METHODS: To investigate the hypothesis of an involvement of ADARB1 gene in the BD, the ADARB1 cDNA has been cloned and sequenced in seven selected bipolar I disorder patients with evidence of familiarity of mood disorders. A detailed investigation of the gene nucleotide sequence in the open reading frame has been performed. RESULTS: No alteration in the sequence of the ADARB1 gene cDNA was found in any patient, except a common neutral polymorphism in three out of seven patients. CONCLUSIONS: Mutations in ADARB1 gene are not commonly associated with bipolar I disorder, therefore other genes in the 21q22 region could be associated with bipolar illness in some families, likely in the context of a multifactorial transmission model.
AMORE M; STRIPPOLI P; LATERZA C; TAGARIELLO P; VITALE L; CASADEI R; FRABETTI F; CANAIDER S; LENZI L; D'ADDABBO P; CARINCI P; TORRONI A; FERRARI G; ZANNOTTI M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/2856
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