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Drugs & Kidney. Helmut Hopfer Basel, Switzerland. Patterns of Drug-induced Lesions. Tubulointerstitium Acute tubular injury - Osmotic nephrosis - Nephrocalcinosis - Chrystal NP Acute interstitial nephritis Chronic tubulointer- stitial nephropathy. Glomeruli
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Drugs & Kidney Helmut Hopfer Basel, Switzerland
Patterns of Drug-induced Lesions Tubulointerstitium Acute tubular injury - Osmotic nephrosis - Nephrocalcinosis - Chrystal NP Acute interstitial nephritis Chronic tubulointer- stitial nephropathy Glomeruli Minimal change disease Focal segmental glomerulosclerosis Membranous GN Crescentic GN Thrombotic micro- angiopathy Blood vessels Hyalinosis Thrombotic micro- angiopathy Vasculitis
Virostatics Quinolones Bisphosphonates Bisphosphonates Propylthiouracil Propylthiouracil Methotrexate Bucillamine Anti-VEGF Anti-VEGF Tamoxifen Ifosfamide Phenytoin Interferon Sirolimus Cisplatin Cisplatin Quinine NSAID OSPS HES Thiazids COX2-I Lithium Lithium Captopril Mitomycine C Mitomycine C Penicillamine Penicillamine Sulfasalazine Gemcitabine Barbiturates Clopidogrel Hydralazin Rifampicin Ranitidin ACE-I NSAID CNI CNI CNI CNI Antibiotics Diazepam Patterns of Drug-induced Lesions Tubulointerstitium Acute interstitial nephritis Chronic tubulointer- stitial nephropathy Acute tubular injury - Osmotic nephrosis - Nephrocalcinosis - Chrystal NP Glomeruli Minimal change disease Focal segmental glomerulosclerosis Membranous GN Crescentic GN Thrombotic micro- angiopathy Blood vessels Hyalinosis Thrombotic micro- angiopathy Vasculitis
Problems • Case reports or small case series • Incomplete clinical data at time of biopsy • Difficulty establishing cause - effect relationships • Patterns are usually not specific for a certain drug • Some drugs may cause various patterns
Intravenous nitrogen-containing BP Hypercalcemia, esp. multiple myeloma and bone metastasis in solid tumors Binding to bone, osteoclast inhibition after localized release Inhibition of farnesyl diphospha-tate synthase inhibition of small GTPases involved in cell signaling Example: Zoledronate
tubular secretion Renal Handling of Bisphosphonates glomerular filtration
Glomerular pathology in BPs • FSGS, collapsing variant, also NOS • minimal change disease • Pamidronate • Zoledronate • Alendronate
Nach: Kino et al., Biopharm Drug Dispos 20: 193, 1999 T. Pfister, Roche
KI67 NaK-ATPase Markowitz et al., Kidney Int 64:281, 2003
ATN Renal Zoledronate Toxicity • Risk factors for kidney injury: • Multiple myeloma or RCC vs. other basic diseases • Increased age • Number of doses • Current use of NSAID • Current or prior use of cisplatin • McDermott et al., J Support Oncol 4:524, 2006
time (h) bisphosphonate tubular damage regeneration signal renal recovery proliferation proliferation blocked abortive regeneration back leak syndrome renal insufficiency cisplatin
Summary • Multiple drugs cause common patterns of renal pathology • Tubules are most frequently affected due to tubular secretion • Important risk factors are preexisting renal diseases and concomitant use of other potentially nephrotoxic drugs • Alertness and awareness of the renal patho-logist are a key prerequisite for identification
Drugs & Kidney: Literature • Perazella MA, Markowitz GS: Bisphosphonate nephrotoxicity. Kidney Int 74:1385-1393, 2008 • Markowitz GS, Perazella MA: Drug-induced renal failure: a focus on tubulo-intestitial disease. Clin Chim Acta 351:31-47, 2005 • John R, Herzenberg AM: Renal toxicity of therapeutic drugs. J Clin Pathol 62:505-515, 2009