Talk:Secretin

Amino Acid sequence listed C -> N termini?

The amino acid sequence of secretin is given here starting at the C terminus and ending at the N terminus, against normal convention to write the sequence from N->C. Is entire sequence backwards? Or did original author/ editor simply switch the COOH/NH2 end labels? —Preceding unsigned comment added by 130.49.146.57 (talk) 03:10, 2 November 2009 (UTC)

Good catch. The sequence is written in the correct N- to the C-terminus direction (see UniProt P09683, residues 28–54), but the CO₂H/NH₂ end labels were reversed from what they should be. This error has now been corrected. The confusion may have been caused by the fact that the C-terminus is amidated (CO₂H → CONH₂). Boghog (talk) 06:35, 17 September 2010 (UTC)

I believe it is typical to represent c-terminal amidation by "-NH₂" rather than "-CONH₂" as this would imply that the carbonyl group is not part of the residue's definition. I have changed this. Please advise if this is incorrect. For example, see "davalintide" in INN list 101. http://www.who.int/medicines/publications/druginformation/innlists/PLFinal101.pdfPeryeat (talk) 21:19, 14 May 2013 (UTC)

Secretin and gastrin inhibition

Pretty sure secretin does not DIRECTLY inhibit gastrin secretion (otherwise, how do you explain ZES which is essentially an XS of G cells?). Instead, its inhibitory function is mediated via somatostatin. Link: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC370446/ Normally, somatostatin inhibition exceeds the enhancement of gastrin secretion by secretin, but in ZES, this goes out of whack because of the XS of G cells relative to D cells, hence an upward elevation in gastrin with secretin stimulation in ZES. I don't know how to word the above in a concise format.

Source: my GI professor, but I'm sure there are other sources out there e.g. http://www.ncbi.nlm.nih.gov/pubmed/2565843

Jimhsu77479 (talk) 20:02, 17 September 2011 (UTC)

Secretin to Treat Autism

The article says that secretin has been proposed as a possible treatment for autism based on a hypothetical gut-brain connection, but there's more to it than that. Secretin has been demonstrated to increase activity in the amygdala, a part of the brain dysfunction of which is linked to autism. http://www.autism.com/ARI/newsletter/182/page2.pdf --CanuckBC (talk) 08:40, 12 February 2012 (UTC)

References

Mentioning First Hormone

I want to know if it might be a good idea to include a sentence in the introductory paragraph describing that secretin is the "first hormone" to be discovered, as it would be something significant about secretin. Somerandomuser (talk) 16:50, 7 June 2017 (UTC)