The bowel hormone can explain 40 % of IBS-D- Cases and lead to treatment

Search, published in the magazine intestinesIt can help in developing a blood test and indicates a possible new treatment.

When we eat, the liver releases bile acid to break the fat so that it can be absorbed into the body. Bile acid is released at the upper end of the small intestine and then absorbed it back to the body at the bottom end.

However, about one person in every 100 is affected by a condition known as bile acid diarrhea (also known as bile acid absorbing), as bile acid is not properly re -absorbed and makes its way to the large intestine (colon). It can lead to urgent and water diarrhea, and patients can risk rings of incontinence.

It may be difficult to diagnose bile acid diarrhea as there are currently routine clinical blood tests. Many individuals are given the diagnosis of Irritable Bowel Syndrome (IBS), which is the term umbrella for a set of cases. It is believed that up to one person in every 20 people has IBS, some of which are estimated by one in three patients who suffer from diarrhea such as their main symptoms have unjust bile acid diarrhea.

The studies conducted in the mice previously suggested that the intestinal hormone known as insulin -similar peptide 5 (ISL5) – located in the cells at the maximum end of the colon and rectum – may play a role in chronic diarrhea. ISL5 is released by these cells when it irritates the bile acid.

Researchers at the Institute of metabolism, Cambridge University, explore whether this hormone may also honor chronic diarrhea in humans. This was possible thanks to the new antibodies developed by the Pharmaceutical Company, which the team cooperates with, allowing them to measure small amounts of INSL5.

A study at the University of Adeleide looking at ways to launch the glp-1-the hormone to which the weights that lose weight-I have previously found that giving an enema of yellow acid to healthy volunteers led to the launch of the GLP-1, but had an unintended result to cause diarrhea. When the Cambridge team analyzed samples from this study, they found that a bile acid syringe caused temporarily exchange of INSL5 levels – the higher the INSL5 levels, the faster the volunteers to use the toilet. This emphasized that ISL5 is likely to play a role in chronic diarrhea.

When the team analyzed the samples obtained from Professor Julian Walters at the Imperial College London College, which includes samples of diarrhea with yellow acid diarrhea, they found that although INCL5 levels are almost discovered in healthy volunteers, they were much higher in patients with bile acid diarrhea. In addition, the higher the INSL5 level, the higher the stool samples.

“This was a very exciting discovery because he showed us that this hormone can play a major role in the symptoms of this condition that is misunderstood. This also means that we may allow us to develop a blood test to help diagnose bile acid diarrhea if INCL5 levels are only high in these individuals,” said Dr. Chris Bannon of the University of Cambridge, the first author of the study.

“When you go to the doctor with chronic diarrhea, they are likely to experience insecurity, exclude an infection or search for signs of inflammation. There have been great research interests in the microbium, but bowel hormones have been neglected. But it is clear that bowel hormones play an important role in things such as bowel management and weight management.”

ISL5 also provides a potential target for treatment. Dr. Bannon and his colleagues obtained other samples of Professor Robleer at the University of Nottingham, who gave OndanSetron anti -deposit – known to prevent ISL5 work in mice – for patients with Irritable Bowel Syndrome. The analysis of these samples by the Cambridge team showed that about 40 % of these patients have raised levels of INSL5, although they have excluded malabsorption of bile acid, and these patients responded better to Oondsetron.

Exactly the reason for the effectiveness of OondSetron is currently unclear, although the known side effect of the drug is constipation. The team will now investigate this matter more, and I hope that they will either be re -displayed the drug or develop better treatments. Diarrhea is usually treated with bile acid with the so -called bile acid division, but this is only effective in about two thirds of patients.

Dr. Banoun added: “I am often asked why we can have a hormone that gives you diarrhea. I think about it as a kind of poison sensor. It is not intended that bile acids be in the colon – it is a majestic of the colon and develops that there is a problem that it develops significantly. Dramatic symptoms.”

Dr. Bannon is a group colleague in the group led by professors Fiona Griel and Frank Ryman at the Institute of metabolism, Cambridge University.

The research has been supported by the Medical Research Council and the Wellcome, with additional support from the National Institute for Health and Care Research Cambridge.