Anxiety Disorders

Anxiety disorders are psychiatric syndromes in which pathological anxiety is the dominant feature. The results of family studies and twin studies suggest a genetic contribution to these disorders, especially in the case of panic disorder. The molecular search for responsible genes has just begun.

Keywords: anxiety; neurotransmitters; panic disorder; obsessive–compulsive disorder; twin studies

 References
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    Crowe R, Goedken R, Wilson R, et al. (2000) A genome-wide survey of panic disorder. American Journal of Medical Genetics 96: 469–470.
    Crowe R, Noyes R, Pauls D and Slymen D (1983) A family study of panic disorder. Archives of General Psychiatry 40: 1065–1069.
    Gratacos M, Nadal M, Martin-Santos R, et al. (2001) A polymorphic genomic duplication on human chromosome 15 is a susceptibility factor for panic and phobic disorders. Cell 106: 367–379.
    Karayiorgou M, Sobin C, Blundell M, et al. (1999) Family-based association studies support a sexually dimorphic effect of COMT and MAOA on genetic susceptibility to obsessive–compulsive disorder. Biological Psychiatry 45: 1178–1189.
    Katsuragi S, Kunugi H, Sano A, et al. (1999) Association between serotonin transporter gene polymorphism and anxiety-related traits. Biological Psychiatry 45: 368–370.
    Kendler K, Walters E, Neale M, et al. (1995) The structure of the genetic and environmental risk factors for six major psychiatric disorders in women: phobia, generalized anxiety disorder, panic disorder, bulimia, major depression and alcoholism. Archives of General Psychiatry 52: 374–383.
    Kennedy J, Bradwejn J, Koszycki D, et al. (1999) Investigation of cholecystokinin system genes in panic disorder. Molecular Psychiatry 4: 284–285.
    Knowles JA, Fyer AJ, Vieland VJ, et al. (1998) Results of a genome-wide genetic screen for panic disorder. American Journal of Medical Genetics 81: 139–147.
    Lyons M, Goldberg J, Eisen S, et al. (1993) Do genes influence exposure to trauma: a twin study of combat. American Journal of Medical Genetics 48: 22–27.
    Pauls D, Alsobrook JI, Goodman W, Rasmussen S and Leckman J (1995) A family study of obsessive–compulsive disorder. American Journal of Psychiatry 152: 76–84.
    Sand P, Lesch K-P, Catalano M, et al. (2000) Polymorphic MAO-A and 5-HT-transporter genes: analysis of interactions in panic disorder. World Journal of Biological Psychiatry 1: 147–150.
    Skre I, Onstad S, Torgersen S, Lygren S and Kringlen E (1993) A twin study of DSM-III-R anxiety disorders. Acta Psychiatrica Scandinavica 88: 85–92.
    book Slater E and Shields J (1969) "Genetic aspects of anxiety". In: Lader M (ed.) Studies of Anxiety, pp. 62–71. London, UK: Royal Medico-Psychological Association.
    Torgersen S (1983) Genetic factors in anxiety disorders. Archives of General Psychiatry 40: 1085–1089.
    Vieland V, Hodge S, Lish J, Adams P and Weissman M (1993) Segregation analysis of panic disorder. Psychiatric Genetics 3: 63–71.
    Weissman M (1993) Family genetic studies of panic disorder. Journal of Psychiatric Research 27(supplement 1): 69–78.
 Further Reading
    book Carey G and Gottesman I (1981) "Twin and family studies of anxiety, phobic and obsessive disorders". In: Klein D and Rabkin J (eds.) Anxiety: New Research and Changing Concepts. New York, NY: Raven Press.
    book Fyer A (2000) "Anxiety disorders: genetics". In: Sadock B and Sadock V (eds.) Comprehensive Textbook of Psychiatry, 7th edn. Philadelphia, PA: Lippincott, Williams and Wilkins.
 Web Links
    ePath corticotropin releasing hormone receptor 2 (CRHR2); Locus ID: 1395. LocusLink: http://www.ncbi.nlm.nih.gov/LocusLink/LocRpt.cgi?l=1395
    ePath solute carrier family 6 (neurotransmitter transporter, dopamine), member 3 (SLC6A3); Locus ID: 6531. LocusLink: http://www.ncbi.nlm.nih.gov/LocusLink/LocRpt.cgi?l=6531
    ePath monoamine oxidase A (MAOA); Locus ID: 4128. LocusLink: http://www.ncbi.nlm.nih.gov/LocusLink/LocRpt.cgi?l=4128
    ePath catechol-O-methyltransferase (COMT); Locus ID: 1312. LocusLink: http://www.ncbi.nlm.nih.gov/LocusLink/LocRpt.cgi?l=1312
    ePath corticotropin releasing hormone receptor 2 (CRHR2); MIM number: 602034. OMIM: http://www3.ncbi.nlm.nih.gov/htbin-post/Omim/dispmim?602034
    ePath solute carrier family 6 (neurotransmitter transporter, dopamine), member 3 (SLC6A3); MIM number: 126455. OMIM: http://www3.ncbi.nlm.nih.gov/htbin-post/Omim/dispmim?126455
    ePath monoamine oxidase A (MAOA); MIM number: 309850. OMIM: http://www3.ncbi.nlm.nih.gov/htbin-post/Omim/dispmim?309850
    ePath catechol-O-methyltransferase (COMT); MIM number: 116790. OMIM: http://www3.ncbi.nlm.nih.gov/htbin-post/Omim/dispmim?116790
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Benjamin, Jonathan, and Kennedy, James(Jul 2006) Anxiety Disorders. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1038/npg.els.0005153]