ɪn wˈʌn stˈʌdi dˈʌn ˌɔn pˈeɪʃənts wɪð fˈʌŋkʃənəl dɪspˈɛpsiə, sˈaɪəntɪsts fˈaʊnd ɐ sɪɡnˈɪfɪkənt ˈɪŋkɹiːs ɪn tˌiːˌɑːɹkˈeɪ ɐ ænd nˈɜːv ɡɹˈoʊθ fˈæktɚɹ ɪn ɡˈæstɹɪk mjuːkˈoʊsə.
In one study done on patients with functional dyspepsia, scientists found a significant increase in TrkA and nerve growth factor in gastric mucosa.