Diabetes on Renal Biopsy-Current Appraisal
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1 Diabetes on Renal Biopsy-Current Appraisal Helen Liapis, M.D. Senior Consultant Arkana Labs Professor of Pathology & Immunology, retired Washington University School of Medicine St. Louis, MO BNS 2016
2 Renal biopsy in patients with diabetes On renal biopsy a review of 48 studies revealed high % (up to >80%) of dual disease superimposed on DM or nondiabetic (ND) entities ~30 40% of patients with diabetes with at least 10 years of history of disease usually present with a frank DN ~3% of newly diagnosed DM have renal involvement 20-30% of Type I diabetes will develop DN over a lifetime 2012 about 347 million people had DM Most common cause of ESRD requiring dialysis A pooled meta-analysis of 48 studies: ERA-EDTA WG 2016 Fiorentino M etal. Nephrol Dial Transplant (2016) 0: 1 14
3 DM on renal biopsy 23,5% (620 biopsies) had DN among 2,642 renal biopsies ~50% of these patients had stage 4-5 CKD 37% had DN alone 36% had NDRD alone and 27% had DN + NDRD ATN (43%), IgA (7%), FSGS (13%) and hypertensive nephrosclerosis (17%) >12 year diabetes duration was the best predictor for DN alone (sensitivity 58%, specificity 73%) Columbia University, NY: Sharma S etal CJASN, 2013
4 Arkana Laboratories: Jan 2014-Apr-2015 ~15,000 renal biopsies 2,739 renal biopsies from diabetic patients (~18%) 144 biopsies performed for significant proteinuria (~6%) The majority of biopsies showed diabetes only. ~10% had other superimposed glomerular disease Disease breakdown is currently pending
5 When is renal biopsy performed in diabetic patients? If presentation is atypical Hematuria Hematuria and proteinuria (active urine) Diabetes of less than 5 years duration Positive serological tests (ANA, ANCA) or abnormal urine tests (UPEP) Rapid fall in GFR No retinopathy AKI
6 Diabetic (Kimmelsteil-Wilson) Nodules are characteristic but not always present K-Ws stain positive (black) with silver stain Silver negative nodules are not diabetic. DD includes: LCDD, Fibrillary glomerulopathy, immunotactoid GP, amyloidosis, smoking, gout and late stage MPGN, idiopathic nodular glomerulosclerosis (ING)
7 K-Ws represent mesangial remodeling and failed resolution of matrix deposition caused by sustained hyperglycosuria
8 Classification of Diabetic Nephropathy (DN) Class I Mild or nonspecific LM changes and EM-proven GBM thickening ( nm) IIa Mild mesangial expansion 25% of the observed mesangium IIb Severe mesangial expansion III Nodular sclerosis (Kimmelstiel Wilson) at least 1 lesion IV Advanced diabetic glomerulosclerosis Global glomerular sclerosis in 50% of glomeruli Lesions from classes I through III Pathologic classification of diabetic nephropathy. Tervaert TW, Mooyaart AL, Amann K, Cohen AH, Cook HT, Drachenberg CB, Ferrario F, Fogo AB, Haas M, de Heer E, Joh K, Noël LH, Radhakrishnan J, Seshan SV, Bajema IM, Bruijn JA; Renal Pathology Society. J Am Soc Nephrol. 2010
9 Marked GBM thickening and linear IgG and Albumin staining are unique features of diabetes (normal GBM~350nm) IGG Mise K, Clinical implications of linear immunofluorescent staining for immunoglobulin G in patients with diabetic nephropathy. Diabetes Res Clin Pract. 2014
10 Diffuse podocyte injury in diabetes
11 Early Type 2 diabetes in children and young adults with metabolic syndrome Renal biopsy from an 18 year-old female with proteinuria with history of diabetes mellitus Armanni- Ebstein tubulopathy Albumin IgG
12 Incidence of a 2 nd disease on diabetes is difficult to access accurately. A short list in our material: IgA nephropathy IgA dominant infection related GN C3 glomerulopathy and post-streptococcal Membranous Glomerulopathy FSGS MPGN secondary to HEPC Light chain deposition disease (LCDD) Fibrillary glomerulopathy ANCA vasculitis and anti-gbm Minimal change disease Thin Basement Membrane Disease Collapsing glomerulopathy Acute interstitial nephritis Calcium Oxalate nephropathy Cholesterol emboli Smoking related nodular glomerulosclerosis TMA Cryoglobulinemia Dense deposit disease
13 IGA
14 69 year-old white man with acute RF on CKD stage III h/o diabetes type 2, HTN, gout and recent right great toe infection treated with antibiotics. His scr is 6.7mg/dl; on admission scr was 13.7mg/dl. His baseline scr: mg/dl IgA Acute proliferative GN with IgA dominant immune complex deposits C3
15 Thick GBM and subepthelial immune type deposits
16 IgA Spectrum in Diabetes A total of 132 patients-55 with outcome data Seventy-three (55.3%) patients had no proliferative glomerular changes and no clinical history of infection and were most consistent with IgA nephropathy on DN 19 (14.4%) showed proliferative glomerular changes, had a history of infection, and were most consistent with IgAdominant infection-associated glomerulonephritis. Forty (30.3%) patients showed a mixture of these findings and did not fit into either category Overall poor prognosis, with 59% of all respondents proceeding to renal replacement therapy or death over an average of 23 (range, 4-54) months Hum Pathol. 2014;45(11): doi: /j.humpath Defining the spectrum of immunoglobulin A-dominant/codominant glomerular deposition in diabetic nephropathy. Cossey LN, Messias N, Messias E, Walker PD, Silva FG.
17 Fibrillary Glomerulopathy It is defined by EM finding of haphazardly arranged, fibrils measuring10 to 30 nm in thickness Congo red negative amyloidosis Some have crescents mimicking vasculitis Mean age at diagnosis is 53 years 25% have an underlying malignancy 15% have autoimmune disease Prognosis is poor >400 cases in our lab, several cases were superimposed on diabetes. A good number in our series have underlying diabetes Fibrillary glomerulonephritis: a report of 66 cases from a single institution. Nasr SH, Valeri AM, Cornell LD, Fidler ME, Sethi S, Leung N, Fervenza FC. Clin J Am Soc Nephrol Apr;6(4):
18 54 year-old African American man with DM, HTN HEPC, renal dysfunction scr 2.9mg/dl and proteinuria 6 gm/24hours. Serologies are positive for ANA and hepatitis C. Complement levels are normal Silver stain negative mesangial deposits IGG IgG
19 Fibrillar intramembranous and mesangial deposits
20 Diabetes and Collapsing Glomerulopathy, likely ischemic change, not a 2 nd disease Salvatore SP. Nephrol Dial Transplant. 2014
21 Clinical diabetes without diabetic nephropathy Diabetic nephropathy without clinical diabetes 65 year old woman with h/o diabetes type 2, HTN, and acute renal failure 85 year-old African American female with CKD, HC and nephrotic proteinuria with creatinine 2.1 mg/dl. Glucose at 104 mg/dl. No clinical diabetes No diabetes, but severe arterionephrosclerosis prediabetic state, gout, hyperuricemia, smoking can cause nodular glomerulosclerosis
22 Strong linear IGG staining in nodular glomerulosclerosis with weak Albumin staining: Anti-GBM-like GN mimics Diabetes IGG IGG Batal etal CKJ 2014 The patient is a 37 year-old woman with history of CKD stage IV, CR 2.3 mg/dl. She has history of hypertension, diabetes and obesity, retinopathy, neuropathy and nephropathy
23 Diabetes presenting with nephrotic syndrome A subset of patients with diabetic nephropathy develop proteinuria >3.5 g/day, hypoalbuminemia, hypercholesterolemia, and peripheral edema usually after a long period of subnephrotic proteinuria Podocyte injury is very frequent on renal biopsy and may relate to acute onset of proteinuria and accelerated progression of DN The question on renal biopsy: is this a podocytopathy, e.g., MCD superimposed on diabetes or the diabetic injury itself?
24 74 year old man with diabetes, HTN and recent onset proteinuria 12 grams/24hrs Diffuse foot process effacement c/w minimal change on diabetes
25 The podocyte in diabetes: Hypertrophy, Binucleation, detachment in Bowman s space
26 Binucleated podocytes
27 Trinucleated podocyte in diabetes
28
29 Detached podocytes
30 Multinucleated podocytes: a form of podocyte loss - Mitotic Catastrophe (MC) Thought to be a failed attempt of podocyte regeneration May occur abruptly and manifest with acute onset nephrotic syndrome in diabetes May be the turning point leading to progressive disease in diabetes Pharmacologic manipulation to deter MC may be possible Liapis H, Romagnani P, Anders HJ. New insights into the pathology of podocyte loss: mitotic catastrophe. Am J Pathol Nov;183(5): Cell cycle re-entry sensitizes podocytes to injury induced death. Hagen M, Pfister E, Kosel A, Shankland S, Pippin J, Amann K, Daniel C. Cell Cycle Jul 17;15(14): Viable podocytes detach in experimental diabetic nephropathy: potential mechanism underlying glomerulosclerosis. Petermann AT, Pippin J, Krofft R, Blonski M, Griffin S, Durvasula R, Shankland SJ. Nephron Exp Nephrol. 2004;98(4):e
31 Diabetic glomerular microaneurysms result from focal mesangiolysis and bleeding representing failed mesangial repair needed to stabilize the glomerulus Suárez-Álvarez B, Liapis H, Anders HJ. Links between coagulation, inflammation,regeneration, and fibrosis in kidney pathology Lab Invest. 2016
32 33 year old man with AKI, h/o DM Fibrin thrombi Early diabetes and microangiopathic injury
33 Endothelial injury in diabetes Cathepsin S Cleavage of Protease-Activated Receptor-2 on Endothelial Cells Promotes Microvascular Diabetes Complications. Kumar Vr S, Darisipudi MN, Steiger S, Devarapu SK, Tato M, Kukarni OP, Mulay SR, Thomasova D, Popper B, Demleitner J, Zuchtriegel G, Reichel C, Cohen CD, Lindenmeyer MT, Liapis H, Moll S, Reid E, Stitt AW, Schott B, Gruner S, Haap W, Ebeling M, Hartmann G, Anders HJ. J Am Soc Nephrol Jun;27(6):
34 Summary The pathologic spectrum in diabetes is increasing Early diabetes type 2 in the young, pre-diabetics, metabolic syndrome not seen before, is on the rise IgA dominant infection related GN, Fibrillary glomerulopathy and diabetic podocyte injury are increasingly recognized as 2nd diseases on diabetes New investigations into the pathogenesis of diabetic glomerular injury reveal novel targets for halting disease progression including: podocyte hypertrophy and podocyte loss, glomerular endothelial injury and aggressive mesangial remodeling
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