Should you trust the radiologist?

Ha, Sun; Sheehan, Donal; Shalabi, Ahmed; West, Malcolm; Ilangovan, Rajapandian; Moorghen, Morgan; Jenkins, John T.; Thomas‐Gibson, Siwan

doi:10.1136/gutjnl-2021-325129

Cited by 1 publication

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“…Serotonin is an endogenous signalling molecule involved in the regulation of fluid and mucus secretion as well as regulation of ion transport in gastrointestinal tract (Banskota et al 2019 ) capable of altering intestinal motility and implicated in diarrhoea outcome (Thiagarajah et al 2015 ; Camilleri et al 2017 ; Hu and Spencer 2018 ). In fact, several diarrhoeagenic agents have been strongly related to this molecule (Ha et al 2021 ; Westerberg et al 2018 ; Singhal et al 2017 ). Serotonin effects are achieved through the action on epithelial 5-HT 2 receptor and neuronal 5-HT 1 , 5-HT 3 and 5-HT 4 receptors (Fidalgo et al 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Serotonin involvement in okadaic acid-induced diarrhoea in vivo

et al. 2021

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The consumption of contaminated shellfish with okadaic acid (OA) group of toxins leads to diarrhoeic shellfish poisoning (DSP) characterized by a set of symptoms including nausea, vomiting and diarrhoea. These phycotoxins are Ser/Thr phosphatase inhibitors, which produce hyperphosphorylation in cellular proteins. However, this inhibition does not fully explain the symptomatology reported and other targets could be relevant to the toxicity. Previous studies have indicated a feasible involvement of the nervous system. We performed a set of in vivo approaches to elucidate whether neuropeptide Y (NPY), Peptide YY (PYY) or serotonin (5-HT) was implicated in the early OA-induced diarrhoea. Fasted Swiss female mice were administered NPY, PYY(3–36) or cyproheptadine intraperitoneal prior to oral OA treatment (250 µg/kg). A non-significant delay in diarrhoea onset was observed for NPY (107 µg/kg) and PYY(3–36) (1 mg/kg) pre-treatment. On the contrary, the serotonin antagonist cyproheptadine was able to block (10 mg/kg) or delay (0.1 and 1 mg/kg) diarrhoea onset suggesting a role of 5-HT. This is the first report of the possible involvement of serotonin in OA-induced poisoning.

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