内科学肾小球疾病.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,内科学肾小球疾病,The peripheral portion of a glomerular lobule,Glomerular Diseases Classification,Primary,Secondary,Hereditary,Pathogenesis,Immunologic glomerular injury,Humoral antibody-mediated,Cellular antibody-independent,Antibody-mediated,Circulating autoantibodies with intrinsic autoantigens:eg.anti-GBM disease,In situ formation of immune complexs/circulationg antibodies with extrinsic antigens that have been“planted”within the glomerulus:eg.Postinfectious glomerulonephritis,ANCA/AECA associated:no disernible immune complexes in the glomerular parenchyma,Cellular antibody-independent glomerular injury,Less well defined,Initiators of injury in pauci-immune glomerulonephritis,which share the downstream mediators with the antibody-dependent injury,Soluble factors from T cells:in MCD and primary FSGS,Nonimmunologic glomerular injury,Metabolic,Hemodynamic,toxic,immunologic,humoral,cellular,non-immunologic,inflammation,Glomerular injury,Clinicopathologic correlates in glomerular disease,Major clinicopathologic entities(contd),Nephrotic syndrome,Glomerular filtration barrier affected,Nephrotic-range proteinuria=3.5g/24h,Hypoalbuminemia,edema,hyperlipidemia,and lipiduria,and a prothrombotic state,Membranous glomerulopathy,Minimal change disease(MCD),FSGS,Membranoproliferative:hybrid lesion of nephritic and nephrotic features,Others,Glomerular deposition diseases:extravascular deposition of paraprotein or fibrillar material,Thrombotic microangiopathies:thrombi within the renal microvasculature,Primary insult,Inflammatory,Metabolic,Hemodynamic or mechanic,Toxic,Infectious,May overlap,May induce similar clinicopahtologic presentations,病变部位,系膜 mesangium 系膜细胞,mesangial cell,系膜基质,mesangial matrix,基膜 basement membrane,上皮细胞 足细胞 podocyte、,足突 foot process,内皮细胞,The peripheral portion of a glomerular lobule,基本病变,增生 proliferation,硬化 sclerosis,1.轻微肾小球病变（Minor Lesion),无特异性病变 光镜下可见轻度系膜细胞增生和 系膜基质增多,轻微病变肾病,minimal change disease，MCD,轻度系膜增殖性肾小球肾炎,毛细血管内增殖性肾小球肾炎恢复期,其他,MCD,（,左）正常，（右）上皮细胞足突广泛融合、消失,2.局灶节段性病变,(1)局灶节段性增殖性肾小球肾炎,focal and segmental proliferative,glomerulonephritis,(2)局灶节段性肾小球硬化,focal and segmental glomerulosclerosis,FSGS,局灶性肾小球肾炎,3.弥漫性肾小球肾炎 (,diffusive glomerulonephritis),(1),膜,性肾病,membranous nephropathy,MN,肾小球基底膜,membranous nephropathy,（左）正常，（右）上皮下免役复合物沉积（D），GBM增厚，钉突形成（S），上皮细胞足突融合,(2),增殖性肾小球肾炎,proliferative glomerulonephritis,系膜,增殖性肾小球肾炎,mesangial proliferative glomerulonephritis,MsPGN,肾小球系膜,IgA,肾病,IgA nephropathy,非,IgA,肾病,IgG,沉积为主,IgM,肾病,mesangial proliferative glomerulonephritis,（左）正常，（右）系膜细胞和基质增生，电子致密物（D）沉积,毛细血管内,增殖性肾小球肾炎,endocapillary proliferative glomerulonephritis,系膜+内皮细胞,endocapillary proliferative glomerulonephritis,（左正常，（右）内皮（E）和系膜（M）细胞增生，上皮下驼峰状电子致密物（D）沉积,系膜毛细血管,性肾小球肾炎,mesangiocapillary glomerulonephritis,又称,膜,增殖性肾小球肾炎,membranoproliferative glomerulonephritis,系膜+基底膜,致密沉积物,性肾小球肾炎,dense desposit glomerulonephritis,电子致密沉积物,mesangiocapillary glomerulonephritis,（左）正常，（右）系膜增生（M），电子致密物（D），广泛插入（I）,新月体,性肾小球肾炎,cresentic glomerulonephritis,又称,毛细血管外,肾小球肾炎,extracapillary glomerulonephritis,肾小球囊上皮细胞,(3),硬化性肾小球肾炎,sclerosing glomerulonephritis,cresentic glomerulonephritis,（左）正常，（右）GBM断裂，纤维蛋白漏出(F)，上皮细胞增生(E)，单核巨噬细胞浸润(P)，新月体形成,4.未分类旳肾小球肾炎,unclassified glomerulonephritis,Clinical presentations,Clinical classification,Acute glomerulonephritis,AGN,Rapidly progressive glomerulonephritis,RPGN,Chonic glomerulonephritis,CGN,Nephrotic syndrome,NS,Latent glomerulonephritis,asymptomatic hematuria and/or proteinuria,Acute nephritic syndrome,Sudden onset(days to weeks),Nephritic urinary sediment,Hematuria:Red blood casts,dysmorphic red blood cells,Subnephrotic proteinuria(20%adults may have persistent proteinuria and/or compromise of GFR,RPGN,Over weeks to months,Nephritic urinary sediment,subnephrotic proteinuria and variable oliguria,hypervolemia,edema,and hypertension,Crescentic GN,Crenscents can also develop concomitantly with proliferative GN,membranous GN and other GN,RPGN-Immunofluorescence microscopy,anti-GBM dis-more discrete linear deposition of Ig along the GBM,immune complex GN-scattered granular deposits of immunoglobulin,pauci-immune GN-paucity or absence of Ig,RPGN-Serologic markers,Depressed C3 level-Type II,anti-GBM antibody-Type I,ANCA-Type III,May overlap,Anti-GBM disease(Goodpastures syndrome),Antibody to,a,3 chain(noncollagenous domain)of type IV collagen,which preferentially expressed in glomerular and pulmonary alveolar basement membrane,RPGN/crescentic GN,hematuria,nephritic urinary sediment,subnephrotic proteinuria,50-70%have lung hemorrhage with hemoptysis or severe alveolar hemorrhage,Anti-GBM lab tests,Anti-GBM antibodies,Renal biopsy,gold standard for diagnosis of anti-GBM nephritis,Diffuse proliferative GN,Focal necrotizing lesions,Crescents in 50%of glomeruli,Linear ribbon-like deposition of IgG along the GBM,pauci-immune RPGN,Idiopathic renal-limited crescentic GN,Microsopic polyangiitis nodosa,Wegeners granulomatosis,Churg-strauss syndrome,All-encompassing term:ANCA-associated small vessel vasculitis,ANCA-associated renal disease,Lethargy,malaise,anorexia,weight loss,fever,arthralgias,myalgias,Elevated ESR/CRP,leukocytosis,thrombocytosis,normochromic normocytic anemia,complement level typically normal,Nephritic urine sediment and subnephrotic proteinuria,Renal dysfunction,Biopsy:focal segmental necrotizing GN with crescent formation,Paucity or absence of Ig,complement and immune deposits,RPGN,I型 II型,III型,抗基膜抗体型 免疫复合物型 非免疫复合物型,IF,线样、沿基膜,颗粒样、系膜,（-）,区和基膜,GBM,抗体,（+）,C,3,、CIC,70%-80%为微,血管炎,ANCA阳性,青、中年,中、老年,中、老年,我国多见,treatment,Glucocorticoid,pulse treatment and maintenance treatment,CTX or AZA,plasmaphereses,immunoadsorption,Better prognosis in relatively early cases(Scr 3.5 g/24h,Hypoalbuminemia 50%)from any cause,Congenital oligomeganephronia,extensive surgical ablation of renal mass,reflux nephropathy,GN,interstitial nephritis,sickle cell disease,ischemia,cyclosporine nephrotoxicity,rejection of allograft,FSGS-treatment,Renal prognosis relatively poor,Remission rates for 8 week glucocorticoids:20-40%,up to 70%for prolonged therapy(16-24 weeks),Immunosuppressants:CTX,cyclosporine,MMF,Poor prognostic factors:hypertension,abnormal renal function,persistent heavy proteinuria,Membranous glomerulopathy(membranous nephropathy,MN),Peak incidence 30-50 years of age,Male:femal 2:1,Named after light micrscopic:diffuse GBM thickening,80%represents with NS,nonselective,Microscopic hematuria 50%,MN-pathology,LM:Diffuse thickening of GBM without inflammation or cellular proliferation,IF:granular deposition of IgG,C3 and terminal components of complements along the glomerular capillary wall,MN-pathogenesis,Idiopathic MN incompletely understood,Immune deposits suggesting an immune process,1/3 with systemic disease:SLE,infections such as hepatitis B,malignancy,drug(eg.gold and penicillamine),MN-treatment and prognosis,remits spontaneously and completely in up to 40%,another 30 to 40%repeated relapses and remissions,The final 10 to 20%slow progressive decline in GFR that typically culminates in ESRD after 10 to 15 years,Poor prognosis indicators:,male gender,older age,hypertension,severe proteinuria and hyperlipidemia,and impaired renal function,Controlled trials of glucocorticoids have failed to show consistent improvement in proteinuria or renal protection.Cyclophosphamide,chlorambucil,and cyclosporine have each been shown to reduce proteinuria and/or slow the decline in GFR in patients with progressive disease in small or uncontrolled studies.,Membranoproliferative glomerulonephritis,MPGN,thickening of the GBM and proliferative changes on light microscopy,type I MPGN:subendothelial and mesangial deposits on electron microscopy that contain C3 and IgG or IgM;rarely,IgA deposits,type II MPGN(dense deposit disease):electron-dense deposits within the GBM and other renal basement membranes(shown by electron microscopy)that stain for C3,but little or no immunoglobulin.,MPGN type I-clinical features,Type I,An immune-complex(IC)GN,nephrotic syndrome,active urinary sediment,and normal or mildly impaired GFR.C3 levels usually depressed,and C1q and C4 levels borderline or low,Associated with infections,systemic IC diseases(SLE,cryoglobulinemia),malignancies,50%of patients reach ESRD by 10 years,MPGN type II-clinical features,Type II,an autoimmune disease with an IgG autoantibody,termed C3 nephritic factor,proteinuria and nephrotic syndrome;some with nephritic syndrome,RPGN,or recurrent macroscopic hematuria,a variable course;the GFR remains stable in some patients and declines gradually to ESRD over 5 to 10 years in others,MPGN type III,Rare,Subepithelial immune deposits,IgA nephropathy(Bergers disease)and Henoch-Schonlein purpura,Pathologically identical,mild sesangial proliferation to diffuse proliferation with crescents,mesangial IgA deposition,with IgG and C3,Dermal IgA deposition and leukocytoclastic vasculitis,Nephritic urine sediment and moderate proteinuria,Macroscopic hematuria and nephrotic-range proteinuria uncommon,IgAN/HSP nephritis-treatment,General measures:symptoms-based,ACEI/ARBs for hypertension and/or proteinuria,Steroids and/or cytotoxic agents often tried in patients with severe disease，eg.Nephrotic proteinuria,severe mesangial proliferation,acute kidney function decline,Mesangioproleferative GN,MsPGN,5-10%idiopathic NS,Diffuse increase in glomerular cellularity(mesangial and endothelial,monocytes infiltration),Maybe a heterogeneous group of disease of MCD and FSGS and milder or resolving forms of the IC and pauci-immune GN,Prognosis also heterogeneous,References,1.Tumlin JA,Madaio MP,Hennigar R.Idiopathic IgA nephropathy:pathogenesis,histopathology,and therapeutic options.Clin J Am Soc Nephrol.2023 Sep;2(5):1054-61.,2.Barratt J,Feehally J.Treatment of IgA nephropathy.Kidney Int.2023 Jun;69(11):1934-8.,