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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Gastroenterol Clin North Am. 2011 Mar;40(1):45–67. doi: 10.1016/j.gtc.2010.12.011

Table 2.

List of genes evaluated in gene-endophenotype studies

Endophenotype: Gastrointestinal transit Endophenotype: Brain imaging
Serotonin genes

  • SLC6A4

Adrenergic genes

  • ADRA2A

  • ADRA2C

Bile acid processing and metabolism

  • NROB2

  • SC10A2

  • KLB

  • FGFR4

  • OST α

  • OST β

  • CYP7A1

Cannabinoid genes

  • FAAH

Cholecystokinin

  • CCK

  • CCKAR

  • CCKBR

Neuropeptide S

  • NPSR1

Other

  • GN β3

 Serotonin

  • SLC6A4

  • HTR3B

Dopamine

  • COMT