Professor Jonathan Barratt


Contact details:

Office: 120, MSB

Telephone: +44 (0)116 252 3020


Personal details


I am a Reader in the Department of Infection Immunity & Inflammation at the University of Leicester and an Honorary Consultant Nephrologist in the John Walls Renal Unit, Leicester General Hospital. I qualified from Manchester University Medical School in 1992 with Honours and undertook my clinical training in Manchester, Leeds and Leicester. My PhD focused on the interaction between IgA and the glomerular mesangial cell and my postdoctoral research has characterised a number of important pathogenic pathways in IgA nephropathy. My research group has interests in lymphocyte homing and B cell activation, IgA1 O-glycosylation, elucidation of the 3-dimensional structure of IgA1 and development of tubulointerstitial scarring in IgA nephropathy. I am on the steering committee and treasurer of the International IgA Nephropathy Network and was a member of the group that developed the Oxford Classification of IgA Nephropathy. I am also actively involved in clinical trials in kidney disease and I am a member of the UK Glomerulonephritis Clinical Study Group, UK Kidney Research Consortium and NIHR UK Clinical Research Network Renal Specialty Group.

I am also Head of the Postgraduate Specialty School of Clinical Academic Training, Health education East Midlands.


The IgA Nephropathy Research Group

Nephrology 2016

  • Our group are interested in a number of aspects of the pathogenesis of this common glomerulonephritis. We host a number of undergraduate and postgraduate students, Academic Foundation doctors, Academic Clinical Fellows and Academic Lecturers and are always happy to be contacted by clinicians and scientists wishing to develop an interest in research in kidney disease.

Current work themes

  • Identification of novel mesangial cell  IgA receptors and defining their role in IgA nephropathy. Dr Karen Molyneux, Senior Research Scientist
  • The role of microRNAs in tubulointerstitial fibrosis in IgA nephropathy. Dr Izabella Pawluczyk
  • Elucidating the 3-dimensional structure of the IgA1 molecule in IgA nephropathy. Dr See Cheng Yeo, MD student and visiting Fellow from Singapore
  • Understanding the role of filtered IgA on proximal tubule activation in IgA nephropathy. Dr Chee Kay Cheung, MRC Clinical Training Fellow
  • Defining the genetic contribution to IgA1 O-glycosylation in IgA nephropathy. Mr David Wimbury, PhD student
  • The role of KCa3.1 in tubular interstitial inflammation and interstitial fibrosis. Dr Dina Nilasari, PhD student & visiting Fellow from Indonesia

IgAN Newsletter Jan 2015

IgAN Newsletter May 2015

Clinical Trial Information Leaflet


Peer reviewed scientific papers

Greer MR, Barratt J, Harper SJ, Allen AC, Feehally J. The nucleotide sequence of the IgA1 hinge region in IgA nephropathy.Nephrol Dial Transplant 1998: 13, 1980-1983

Barratt J, Bailey EM, Buck KS, Mailley J, Moayyedi P, Feehally J, Turney JH, Crabtree JE, Allen AC. Exaggerated systemic antibody response to mucosal Helicobacter pylori infection in IgA nephropathy. Am J Kid Dis. 1999: 33, 1049-1057

Allen AC, Bailey EM, Barratt J, Buck KS, Feehally J. Analysis of IgA1O-glycans in IgA nephropathy by fluorophore assisted carbohydrate electrophoresis. J Am SocNephrol. 1999, 10, 1763-1771

Barratt J, Parajasingham R, Sayers RD, Feehally J. Outcome of acute renal failure following surgical repair of ruptured abdominal aortic aneurysms. Eur J CardiovascEndovascSurg 2000; 20(2):163-168

Barratt J, Greer MR, Pawluczyk IZA, Allen AC, Bailey EM, Buck KS, Feehally J. Identification of a novel Fc alpha receptor expressed by human mesangial cells. Kidney Int 2000; 57:1936-1948

Allen AC, Bailey EM, Brenchley PEC, Buck KS, Barratt J and Feehally J. Mesangial IgA1 in IgA nephropathy exhibits aberrant O-glycosylation: observations in three patients. Kidney Int 2001; 60: 969-973

Buck KS, Foster EM, Watson D, Barratt J, Pawluczyk IZA, Knight JF, Feehally J and Allen AC. Expression of T cell receptor variable region families by bone marrow gd T cells in patients with IgA nephropathy. ClinExpImmunol 2002;127(3):527-532

Yang B, El Nahas AM, Fisher M, Wagner B, Huang L, Storie I, Barnett D, Barratt J, Smith AC and Johnson TS. Inhibitors directed towards Caspase -1 & 3 are less effective than pan caspase inhibition in preventing renal proximal tubular cell apoptosis. Nephron ExpNephrol 2004;96:39-51

Smith AC, de Wolff JF, Molyneux K, Feehally J, Barratt J. O-glycosylation of serum IgD in IgA nephropathy. J Am SocNephrol. 2006;17(4):1192-9.

Smith AC, Molyneux K, Feehally J, Barratt J. O-glycosylation of serum IgA1 antibodies against mucosal and systemic antigens in IgA nephropathy. J Am SocNephrol. 2006; 17(12):3520-8

Feehally J, Barratt J, Coppo R, Cook T, Roberts I. International IgA nephropathy network clinico-pathological classification of IgA nephropathy. ContribNephrol. 2007; 157: 13-18.

Batra A, Smith AC, Feehally J and Barratt J. T cell homing receptor expression in IgA nephropathy. Nephrol Dial Transplant 2007; 22: 2540-2548

Buck KS, Smith AC, Molyneux K, El Barbary H, Feehally J, Barratt J. B cell O-galactosyltransferase activity, and expression of O-glycosylation genes in bone marrow in IgA nephropathy. Kidney Int 2008; 73:1128-1136

de Wolff JF, Dickinson SJ, Smith AC, Molyneux K, Feehally J, Simon A, Barratt J. Abnormal IgD and IgA1 O-glycosylation in hyperimmunoglobulinaemia D and periodic fever syndrome. ClinExp Med 2009; 9: 291-296

Cattran D, Coppo R, Cook T, Feehally J, Roberts I, Troyanov S, Alpers C, Amore A, Barratt J et al. The Oxford classification of IgA nephropathy: rationale, clinicopathological correlations, and classification. Kidney Int 2009; 76(5):534-45

Roberts I, Cook T, Troyanov S, Alpers C, Amore A, Barratt J et al. The Oxford classification of IgA nephropathy: pathology definitions, correlations, and reproducibility. Kidney Int 2009;76(5):546-56

Coppo R, Troyanov S, Camilla R, Hogg R, Cattran D, Cook T, Feehally J, Roberts I, Amore A, Alpers C, Barratt J et al. The Oxford IgA nephropathy clinicopathological classification: As valid for children as for adults. Kidney Int 2010; 77(10):921-7

Ehsan S, Ball G, Choke E, Molyneux KM, London NJ, Herbert KE, Barratt J, Sayers RD, Bown MJ. Disease specific biomarkers of abdominal aortic aneurysms detected by surface enhanced laser desorption ionization time of flight mass spectrometry. Eur J VascEndovasc Surg. 2012;44(1):52-4.

Kim MJ, McDaid JP, McAdoo SP, Barratt J, Molyneux K, Masuda ES, Pusey CD, Tam FW. Spleen Tyrosine Kinase Is Important in the Production of Proinflammatory Cytokines and Cell Proliferation in Human Mesangial Cells following Stimulation with IgA1 Isolated from IgA Nephropathy Patients. J Immunol. 2012 Sep 5.

Kiryluk K, Li Y, Scolari F, Sanna-Cherchi S, Choi M, Verbitsky M, Fasel D, Lata S, Prakash S, Shapiro S, Fischman C, Snyder HJ, Appel G, Izzi C, Viola BF, Dallera N, Del Vecchio L, Barlassina C, Salvi E, Bertinetto FE, Amoroso A, Savoldi S, Rocchietti M, Amore A, Peruzzi L, Coppo R, Salvadori M, Ravani P, Magistroni R, Ghiggeri GM, Caridi G, Bodria M, Lugani F, Allegri L, Delsante M, Maiorana M, Magnano A, Frasca G, Boer E, Boscutti G, Ponticelli C, Mignani R, Marcantoni C, Di Landro D, Santoro D, Pani A, Polci R, Feriozzi S, Chicca S, Galliani M, Gigante M, Gesualdo L, Zamboli P, Battaglia GG, Garozzo M, Maixnerová D, Tesar V, Eitner F, Rauen T, Floege J, Kovacs T, Nagy J, Mucha K, Pączek L, Zaniew M, Mizerska-Wasiak M, Roszkowska-Blaim M, Pawlaczyk K, Gale D, Barratt J, Thibaudin L, Berthoux F, Canaud G, Boland A, Metzger M, Panzer U, Suzuki H, Goto S, Narita I, Caliskan Y, Xie J, Hou P, Chen N, Zhang H, Wyatt RJ, Novak J, Julian BA, Feehally J, Stengel B, Cusi D, Lifton RP, Gharavi AG. Discovery of new risk loci for IgA nephropathy implicates genes involved in immunity against intestinal pathogens.Nat Genet. 2014 Nov;46(11):1187-96. doi: 10.1038/ng.3118. Epub 2014 Oct 12

Watson EL, Greening NJ, Viana JL, Aulakh J, Bodicoat DH, Barratt J, Feehally J, Smith AC.Progressive Resistance Exercise Training in CKD: A Feasibility Study.Am J Kidney Dis. 2014 Dec 17. pii: S0272-6386(14)01381-X. doi: 10.1053/j.ajkd.2014.10.019. [Epub ahead of print]

Oltean S, Qiu Y, Ferguson JK, Stevens M, Neal C, Russell A, Kaura A, Arkill KP, Harris K, Symonds C, Lacey K, Wijeyaratne L, Gammons M, Wylie E, Hulse RP, Alsop C, Cope G, Damodaran G, Betteridge KB, Ramnath R, Satchell SC, Foster RR, Ballmer-Hofer K, Donaldson LF, Barratt J, Baelde HJ, Harper SJ, Bates DO, Salmon AH. Vascular Endothelial Growth Factor-A165b Is Protective and Restores Endothelial Glycocalyx in Diabetic Nephropathy. J Am SocNephrol. 2015 Aug;26(8):1889-904. doi: 10.1681/ASN.2014040350. Epub 2014 Dec 26.

Hui GK, Wright DW, Vennard OL, Rayner LE, Pang M, Yeo SC, Gor J, Molyneux K, Barratt J, Perkins SJ. The solution structures of native and patient monomeric human IgA1 reveal asymmetric extended structures: implications for function and IgAN disease. Biochemical Journal Aug 12, 2015; DOI: 10.1042/BJ20150612

Saratzis A, Harrison S, Barratt J, Sayers RD, Sarafidis PA, Bown MJ. Intervention Associated Acute Kidney Injury and Long-Term Cardiovascular Outcomes. Am J Nephrol. 2015;42(4):285-94. doi: 10.1159/000440986. Epub 2015 Oct 24.

Named investigator

ASTRAL Investigators, Wheatley K, Ives N, Gray R, Kalra PA, Moss JG, Baigent C, Carr S, Chalmers N, Eadington D, Hamilton G, Lipkin G, Nicholson A, Scoble J. Revascularization versus medical therapy for renal-artery stenosis. N Engl J Med. 2009 Nov 12;361(20):1953-62.

Coppo R, Troyanov S, Bellur S, Cattran D, Cook HT, Feehally J, Roberts IS, Morando L, Camilla R, Tesar V, Lunberg S, Gesualdo L, Emma F, Rollino C, Amore A, Praga M, Feriozzi S, Segoloni G, Pani A, Cancarini G, Durlik M, Moggia E, Mazzucco G, Giannakakis C, Honsova E, Sundelin BB, Di Palma AM, Ferrario F, Gutierrez E, Asunis AM, Barratt J, Tardanico R, Perkowska-Ptasinska A; on behalf of the VALIGA study of the ERA-EDTA Immunonephrology Working Group.Validation of the Oxford classification of IgA nephropathy in cohorts with different presentations and treatments. Kidney Int. 2014 Apr 2.

Tesar V, Troyanov S, Bellur S, Verhave JC, Cook HT, Feehally J, Roberts IS, Cattran D, Coppo R; VALIGA study of the ERA-EDTA Immunonephrology Working Group. Corticosteroids in IgA Nephropathy: A Retrospective Analysis from the VALIGA Study. J Am Soc Nephrol. 2015 Sep;26(9):2248-58. doi: 10.1681/ASN.2014070697. Epub 2015 Feb 12.

Barbour SJ, Espino-Hernandez G, Reich HN, Coppo R, Roberts IS, Feehally J, Herzenberg AM, Cattran DC; VALIGA; OXFORD DERIVATION AND NORTH AMERICAN VALIDATION. The MEST score provides earlier risk prediction in IgA nephropathy. Kidney Int. 2015 Oct 28. doi: 10.1038/ki.2015.322. [Epub ahead of print]

Feehally J, Coppo R, Troyanov S, Bellur SS, Cattran D, Cook T, Roberts IS, Verhave JC, Camilla R, Vergano L, Egido J, Wiecek A, Karkoszka H, Tesar V, Maixnerova D, Ots-Rosenberg M, Quaglia M, Rollino C, Magistroni R, Cusinato S, Cravero R, Peruzzi L, Lundberg S, Gesualdo L, Cancarini G, Feriozzi S, Ferrario F; VALIGA study of the ERA-EDTA Immunonephrology Working Group. Tonsillectomy in a European Cohort of 1,147 Patients with IgA Nephropathy. Nephron. 2015 Nov 20. [Epub ahead of print]

Case reports

Dickinson S, Carr S, deZoysa J and Barratt J. Cystic Renal Disease Presenting in Pregnancy: A Novel Presentation of Oral-Facial-Digital Syndrome Type 1. NDT Plus 2008; 1: 23 - 25.

Uddin A, West K, Barratt J. Lumps, bumps and vasculitis. JRSM 2009; 102: 29-31

Koulouri O, Jones S, Beable R and Barratt J. Renal colic in a dialysis patient: a case of renal stone disease. J R Soc Med Sh Rep 2011;2:57-59.

Cheung CK, Warwick G and Barratt J. Metastatic pulmonary calcification in end stage renal disease.BMJ 2015;350:h1544

Hamilton P, Ogundare O, Raza A, Ponnusamy A, Gorton J, Alachkar H, Choudhury J, Barratt J, Kalra PA. Long-Term Therapeutic Plasma Exchange to Prevent End-Stage Kidney Disease in Adult Severe Resistant Henoch-Schonlein Purpura Nephritis. Case Rep Nephrol. 2015;2015:269895. Epub 2015 Nov 3.

Invited reviews

Barratt J, Feehally J and Smith A. Pathogenesis of IgA nephropathy. Seminars in Nephrology 2004; 24(3):197-217.

Barratt J and Feehally J. IgA nephropathy. J Am SocNephrol 2005; 16(7):2088-2097

Barratt J and Feehally J. Treatment of IgA nephropathy. Kidney Int 2006; 69(11):1934-1938

Barratt J and Feehally J. Causes and diagnosis of IgA nephropathy. In: UpToDate, Wellesley, MA, 2015

Barratt J, Smith AC and Feehally J. The pathogenic role of IgA1 O-linked glycosylation in the pathogenesis of IgA nephropathy. Nephrology 2007; 12(3):275-84

Barratt J and Topham PS. Urinary proteomics: the past, present and future. CMAJ 2007; 177(4): 361-8

Barratt J. What to do with patients with abnormal dipstick urinalysis. Medicine 2007; 35(7): 365-367

Barratt J, Smith AC, Molyneux K and Feehally J. Immunopathogenesis of IgA nephropathy. Seminars in Immunopathology 2007; 29(4): 427-443

Pouria S and Barratt J. Secondary IgA nephropathy.SeminNephrol. 2008 Jan;28(1):27-37

Barratt J. What I tell my patients about IgA nephropathy. Br J Renal Medicine 2008; 13 (3): 15-18

Boyd J, Barratt J.  Interpretation and management of abnormal dipstick urinalysis.Medicine  2011Volume 39Issue 6, Pages 312-316

Barratt J and Feehally J. Primary IgA nephropathy: New insights into pathogenesis. SeminNephrol. 2011; 31(4):349-60.

Boyd JK, Cheung CK, Molyneux K, Feehally J, Barratt J. An update on the pathogenesis and treatment of IgA nephropathy. Kidney Int. 2012 May;81(9):833-43

Cheung C, Bashir S, Barratt J. IgA nephropathy.Br J Hosp Med (Lond). 2014 Nov;75Suppl 11:C173-6. doi: 10.12968/hmed.2014.75.Sup11.C173.

Cheung C and Barratt J. Patient Management: Renal Disease In Myeloma. Foundation Years JournalVolume 8, Issue 4: Immunology and Nephrology

Feehally J, Barratt J. The genetics of IgA Nephropathy— an overview from Western Countries.Kidney Dis 2015;1:33-41 (DOI:10.1159/000381738)

Yeo SC, Liew A, Barratt J. Emerging Therapies in IgA Nephropathy. Nephrology (Carlton).2015 Jun 1.doi: 10.1111/nep.12527.

Oozeerally I, Barratt J. Post-Transplant Lymphoproliferative Disease.Foundation Years JournalVolume 9, Issue 5: Infectious Diseases and Nephrology.

Yeo SC and Barratt J. IgA Nephropathy. BMJ Best Practicein press

Book chapters

Allen AC, Barratt J and Feehally J.  Immunoglobulin A Nephropathy.In: Immunologic Renal Diseases, 2nd edition, edited by EG Neilson and WG Couser. Lippincott Williams 2001

Barratt J and Feehally J. Management of IgA nephropathy.In: Evidence-based Nephrology, 1st edition, edited by DA Molony and J Craig. Blackwell Publishing 2009

Barratt J and Feehally J. IgA nephropathy and HenochSchonleinPurpura. In: The Oxford Textbook of Medicine, 5th edition, edited by DA Warrell, TM Cox and JD Firth. Oxford University Press, 2009

Barratt J and Feehally J. IgA nephropathy and HenochSchonleinPurpura.In: Therapy in Nephrology and Hypertension, 2nd edition, edited by J Wilcox and D Salant. Saunders, 2008

Barratt J. Pathogenesis of IgA nephropathy.In: Therapy of Renal Diseases and Related Disorders, 4th edition, edited by WN Sukiand  SGMassry. Kluwer Academic Publishers, 2009

Barratt J and Feehally J. Other non-immunomodulatory agents for the treatment of IgA nephropathy.In: Advances in IgA Nephropathy, edited by KN Lai. Imperial College Press and the World Scientific Publisher, 2009

Barratt J. IgA nephropathy and HenochSchonleinpurpura.In: Oxford Desk Reference in Nephrology, edited by J Barratt, K Harris and P Topham. Oxford University Press, 2008

Boyd J, Cheung CK, Barratt J. IgA Nephropathy. In: Encyclopedia of Medical Immunology, edited by Ian R. Mackay and Noel R. Rose. Springer, 2014   ISBN 978-0-387-84827-3

Cheung CK, Boyd J, Barratt J. IgA nephropathy and HenochSchonleinpurpura.In: Practical Nephrology, edited by M Harber. Springer, 2014   ISBN 978-1-4471-5547-8

Barratt J. The Renal System.In: The Practical Pocket Guide to History Taking and Clinical Examination, edited by Timothy Williamson and Lesley ThomsPrice. Radcliffe, 2014  ISBN 9781908911551

Cheung CK, Barratt J. Is IgA nephropathy a single disease? In: Pathogenesis and Treatment in IgA Nephropathy, edited by Y Tomino. Springer, 2015

Editorials and commentaries

Floege J, Eitner F, Barratt J, Smith AC and Feehally J. Mutant mice provide new insight into the role of (mis-)glycation in IgA nephropathy and other glomerular diseases. Nephrol Dial Transplant 2007; 22:1518-20

Topham PS, Barratt J and Feehally J. A spoonful of sugar helps the proteinuria go down? Nephrol Dial Transplant. 2008; 23: 813-5

Smith AC, Molyneux K, Feehally J and Barratt J. Is sialylation of IgA the agent provocateur of IgA nephropathy? Nephrol. Dial. Transplant. 2008; 23: 2176 – 2178

Barratt J, Eitner F, Feehally J and Floege J. Immune complex formation in IgA nephropathy: a case of the 'right' antibodies in the 'wrong' place at the 'wrong' time? Nephrol. Dial. Transplant. 2009; 24: 3620-3

Barratt J, Eitner F. Glomerular disease: sugars and immune complex formation in IgA nephropathy. Nat Rev Nephrol. 2009; 5: 612-4

Boyd J, Barratt J. Immune complex formation in IgA nephropathy: CD89 a “saint” or a “sinner”? Kidney Int. 2010; 78(12):1211-3.

Boyd J, Barratt J. Inheritability of IgA1 glycosylation in IgA nephropathy and HenochSchÖnleinpurpura nephritis: where do we go next? Kidney Int. 2011; 80(1):8-10.

Cook T, Roberts IS, Feehally J, Barratt J. Evidence-based classification of glomerular pathology.Kidney Int. 2014 Nov;86(5):1059. doi: 10.1038/ki.2014.248.

Cheung C, Barratt J. Gluten and IgA nephropathy: you are what you eat?Kidney Int. 2015 Aug;88(2):215-8. doi: 10.1038/ki.2015.149.


Oxford Desk Reference in Nephrology, Oxford University Press, 2008

Editors: Jonathan Barratt, Kevin Harris and Peter Topham

ISBN 978-0199229567

Working party reports

Report of the Renal Association Working Party on Peritoneal Access. 2008

Other editorial work

Guest editor with John Feehally for Seminars in Nephrology for edition entitled “IgA nephropathy” SeminNephrol. 2008 Jan;28(1)

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