Publication: Journal of Clinical Endocrinology & Metabolism
Katherine Lawler, Isabel Huang-Doran, Takuhiro Sonoyama, Tinh-Hai Collet, Julia M Keogh, Elana Henning, Stephen O’Rahilly, Leonardo Bottolo, I Sadaf Farooqi
The hormone leptin is a key regulator of weight. Children who lack leptin (due to changes in the leptin gene) have a very large appetite and rapidly gain weight. After treatment with leptin injections, they can lose weight.
The researchers know that leptin works by reducing their appetite, but they wanted to find out if leptin can affect other metabolic processes around the body too.
They used a cutting-edge technique called metabolomics to simultaneously measure more than 600 metabolic reactions in a single blood sample taken from children and young adults before and after a short period of leptin treatment.
They found that leptin not only caused big shifts in how the body processes fats, but it affected amino acids (which make proteins), bile acids (which can act as cell signals) and steroids (involved in making hormones). These changes overlapped with the changes discovered previously in healthy adults after a period of fasting.
The research findings show that as well as affecting how much food we eat, leptin affects other aspects of our metabolism. This research paves the way for further research into leptin’s action on different cells in the human body.View publication
Anthony P. Coll, Michael Chen, Stephen O’Rahilly et al
25 December 2019
Cambridge scientists have discovered that metformin causes the cells of the intestine to make large amounts of a hormone, called GDF15, and secrete it into the bloodstream.
The high blood levels of GDF15 are sensed by a highly specific area of the brain where they suppress hunger and reduce food intake. When GDF15 is blocked, metformin has no effect on body weight.
The work was undertaken in the MRC Metabolic Diseases Unit at the University of Cambridge with collaborators at NGM Biopharmaceuticals, the University of Glasgow and elsewhere.
Dr Tony Coll, a lead author, said “We usually think that drugs have to pass through the intestine to have their effects in the body. In this case, though, the cells of the intestine themselves respond to the drug to create a hormonal signal which does the work.”
Metformin has been used to treat Type 2 diabetes for over 60 years and is the world’s most commonly prescribed anti-diabetic drug. It can also prevent the onset of diabetes in those at risk, doing so by helping people to lose and keep off weight. However, how metformin reduces body weight has been a mystery.
Professor Stephen O’Rahilly said: “How metformin keeps body weight down has been a mystery. This work shows that all of this effect is down to GDF15 acting on a tiny number of cells in the brain.”
These findings are supported by an independent study from McMaster University published in Nature Metabolism and should stimulate research into the use of GDF15 itself as an anti-obesity agent.
Publication: J Clin Endocrinol Metab.
David Church, Luís Cardoso, Richard G Kay, Claire L Williams, Bernard Freudenthal, Catriona Clarke, Julie Harris, Myuri Moorthy, Efthmia Karra, Fiona M Gribble, Frank Reimann, Keith Burling, Alistair J K Williams, Alia Munir, T Hugh Jones, Dagmar Führer, Lars C Moeller, Mark Cohen, Bernard Khoo, David Halsall, Robert K Semple
31 July 2018
Insulin and c-peptide levels are routinely measured to monitor glucose-competence in patients, however, ocassionally the standard assays give readings well ouside the normal range. Very high readings could indicate an insulin producing tumor or exogenous insulin overdosing or in rare patients can be a result of insulin-auto antibodies.
LC-MS/MS can be a highly selective method to detect insulin and distinguishes between natural insulin and insulin drugs, making it valuable add-on to “standard” immunoassays when these give unexpected readings. It can also measure multiple analytes in a single extraction, reducing the volume of blood needed for analysis.
The superior performance of LC-MS/MS in analysing blood from insulin autoimmune syndrome patients should enable clearer diagnosis and the initiation of immunomodulatory therapy.View publication
Publication: Kidney International
Lotta LA, Mokrosiński J, Mendes de Oliveira E, Li C, Sharp SJ, Luan J, Brouwers B, Ayinampudi V, Bowker N, Kerrison N, Kaimakis V, Hoult D, Stewart ID, Wheeler E, Day FR, Perry JRB, Langenberg C, Wareham NJ, Farooqi IS.
18 April 2019View publication
Publication: Nature Genetics
Lotta LA, Gulati P, Day FR, Payne F, Ongen H, van de Bunt M, Gaulton KJ, Eicher JD, Sharp SJ, Luan J, De Lucia Rolfe E, Stewart ID, Wheeler E, Willems SM, Adams C, Yaghootkar H; EPIC-InterAct Consortium; Cambridge FPLD1 Consortium, Forouhi NG, Khaw KT, Johnson AD, Semple RK, Frayling T, Perry JR, Dermitzakis E, McCarthy MI, Barroso I, Wareham NJ, Savage DB, Langenberg C, O’Rahilly S, Scott RA.
14 November 2016View publication
van der Klaauw AA, Croizier S, Mendes de Oliveira E, Stadler LKJ, Park S, Kong Y, Banton MC, Tandon P, Hendricks AE, Keogh JM, Riley SE, Papadia S, Henning E, Bounds R, Bochukova EG, Mistry V, O’Rahilly S, Simerly RB; INTERVAL; UK10K Consortium, Minchin JEN, Barroso I, Jones EY, Bouret SG, Farooqi IS.
17 January 2019View publication
Publication: JCI Insight
Cangul H, Liao XH, Schoenmakers E, Kero J, Barone S, Srichomkwun P, Iwayama H,Serra EG, Saglam H, Eren E, Tarim O, Nicholas AK, Zvetkova I, Anderson CA, FranklFEK, Boelaert K, Ojaniemi M, Jääskeläinen J, Patyra K, Löf C, Williams ED; UK10K Consortium, Soleimani M, Barrett T, Maher ER, Chatterjee VK, Refetoff S,Schoenmakers N
18 October 2018View publication
Publication: The New England Journal of Medicine
Marcovecchio ML, Chiesa ST, Bond S, Daneman D, Dawson S, Donaghue KC, Jones TW, Mahmud FH, Marshall SM, Neil HAW, Dalton RN, Deanfield J, Dunger DB; AdDIT Study Group
2 November 2017View publication
Publication: The Lancet
Tauschmann M, Thabit H, Bally L, Allen JM, Hartnell S, Wilinska ME, Ruan Y, Sibayan J, Kollman C, Cheng P, Beck RW, Acerini CL, Evans ML, Dunger DB, Elleri D, Campbell F, Bergenstal RM, Criego A, Shah VN, Leelarathna L, Hovorka R; APCam11 Consortium.
3 October 2018View publication
Poole KE, Skingle L, Gee AH, Turmezei TD, Johannesdottir F, Blesic K, Rose C, Vindlacheruvu M, Donell S, Vaculik J, Dungl P, Horak M, Stepan JJ, Reeve J, Treece GM.
21 October 2016View publication
Joost Overduin, Tinh-Hai Collet, Nenad Medic, Elana Henning , Julia M. Keogh, Faye Forsyth, Cheryl Stephenson, Marja W. Kanning, Rianne M.A.J. Ruijschop, I. Sadaf Farooqi, Agatha A. van der Klaauw.
1 December 2016View publication
Publication: Nat Comms
Agatha A. van der Klaauw, Julia M. Keogh, Elana Henning, Cheryl Stephenson, Sarah Kelway, Victoria M. Trowse, Naresh Subramanian, Stephen O’Rahilly, Paul C. Fletcher, I. Sadaf Farooqi.
4 October 2016View publication