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Enzyme

Asparaginase

Elspar · ASNase

Enzyme · approved 1978 · 6 references

An enzyme therapy whose rare AKI is downstream of pancreatitis and hemodynamic complications.

Signature injury
Prerenal / Hemodynamic AKI
Severity
Mild
Reversibility
Reversible
Onset
Linked to intercurrent complications during induction/intensification therapy.

Signature kidney injury & incidence

Prerenal / Hemodynamic AKI.

Direct asparaginase nephrotoxicity is uncommon; classic toxicities are hypersensitivity (up to ~30% with E. coli-derived enzyme), pancreatitis, hepatic dysfunction, hyperammonemia, and coagulopathy/thrombosis. When AKI occurs it is typically secondary to pancreatitis, hemodynamic instability, or thrombotic complications rather than a direct tubular toxin, and is not well quantified.

Source: Hijiya & van der Sluis, Leuk Lymphoma 2016

Reported injury signatures: Prerenal / Hemodynamic AKI.

Onset timing & rechallenge

Variable / unpredictable — Renal injury is tied to intercurrent complications arising during induction/intensification therapy, with no defined onset window.

Mechanism of kidney injury

No characteristic direct renal toxin effect. Severe asparaginase-induced pancreatitis (third-spacing, SIRS, shock) or thrombotic events (the enzyme depletes antithrombin III, fibrinogen, and plasminogen) can compromise renal perfusion, producing prerenal/ischemic injury; coagulopathy may rarely contribute to renal vascular events.

Clinical presentation

When present, AKI accompanies pancreatitis or hemodynamic compromise: rising creatinine, oliguria, and volume disturbance with an otherwise bland renal picture. Watch for abdominal pain (pancreatitis), thrombosis (including cerebral sinus), and encephalopathy (hyperammonemia).

Management

Treat the underlying complication (pancreatitis, anaphylaxis/shock, thrombosis, hyperammonemia) and support renal perfusion with fluids; prerenal AKI usually reverses with resolution. Discontinue or switch asparaginase formulation for severe toxicity.

Risk factors

  • Asparaginase-induced pancreatitis
  • Hypersensitivity reactions with hypotension
  • Thrombotic complications and acquired coagulopathy (low antithrombin III)
  • Hyperammonemia/metabolic stress

Prevention

  • Supportive hydration and prompt management of complications
  • Thrombosis prophylaxis and antithrombin repletion per protocol

Renal dose adjustment

Large protein cleared by reticuloendothelial proteolysis, not renal filtration - no renal dose adjustment. Management is toxicity-driven (hold/switch for pancreatitis, severe hypersensitivity, or thrombosis).

Dialyzability & ESKD dosing

Large enzyme; not dialyzable. Dialysis/CRRT is used to support AKI or refractory hyperammonemia, not to clear the drug.

Differential diagnosis

Pancreatitis- or sepsis-driven prerenal/ischemic AKI vs thrombotic vascular events vs tumor lysis at induction. The accompanying pancreatitis, coagulopathy, or thrombosis points away from a primary renal lesion.

Monitoring

  • Amylase/lipase and abdominal symptoms (pancreatitis)
  • Fibrinogen and antithrombin III; signs of thrombosis
  • Ammonia if encephalopathy; glucose, triglycerides, LFTs
  • Creatinine/volume status with any complication
  • Signs of hypersensitivity reaction

Key trials & series

  • Pediatric ALL backbone regimens (e.g. COG/Berlin-Frankfurt-Munster protocols) defining the asparaginase toxicity profile

Clinical pearls

  • Asparaginase rarely touches the kidney directly - look for pancreatitis, thrombosis, or shock as the cause of AKI.
  • It depletes antithrombin III and fibrinogen, so its renal/vascular risk is thrombotic as much as hemodynamic.
  • Because clearance is proteolytic, no renal dose adjustment is needed.

Anticancer mechanism

Bacterial enzyme that hydrolyzes circulating asparagine (and some glutamine), starving leukemic lymphoblasts that lack asparagine synthetase and cannot synthesize it. Cornerstone of acute lymphoblastic leukemia (ALL) and lymphoblastic lymphoma regimens.

Note

Rare AKI, predominantly pancreatitis-, thrombosis-, and hemodynamics-mediated; not a direct nephrotoxin and not renally cleared.

Guidelines & consensus

Each recommendation below is this atlas's faithful summary of the source, not a quotation from it — follow the PubMed link for the wording the society published. Summaries may be superseded; consult the current full text and individualize to the patient.

  • ADQI (2026) — The nephrotoxic effects of anti-cancer therapies: consensus report of the 34th Acute Disease Quality Initiative workgroupProvides expert-based statements (modified Delphi) on preventing and managing cisplatin/platinum-associated AKI, including isotonic IV hydration, attention to volume status and concomitant nephrotoxins, and incorporates evidence that IV magnesium supplementation may reduce cisplatin-associated AKI; emphasizes risk stratification and standardized AKI definitions.Nat Rev Nephrol · PMID 41361704
  • SIRM (2022) — SIRM-SIN-AIOM: appropriateness criteria for evaluation and prevention of renal damage in the patient undergoing contrast medium examinations-consensus statements from Italian College of Radiology (SIRM), Italian College of Nephrology (SIN) and Italian Association of Medical Oncology (AIOM)Recommends eGFR-based renal risk assessment and pre/post-contrast isotonic saline or sodium bicarbonate hydration; advises maintaining a 5-7 day interval between iodinated contrast administration and cisplatin in cancer patients to reduce additive nephrotoxicity.Radiol Med · PMID 35303246
  • KDIGO (2020) — KDIGO Controversies Conference on onco-nephrology: understanding kidney impairment and solid-organ malignancies, and managing kidney cancerIdentifies platinum compounds (especially cisplatin) as leading cytotoxic causes of acute tubular injury, AKI, and electrolyte/magnesium wasting; calls for interdisciplinary onco-nephrology care, accurate GFR estimation, and individualized drug dosing in patients with reduced kidney function.Kidney Int · PMID 33126977
  • KDIGO (2020) — KDIGO Controversies Conference on onco-nephrology: kidney disease in hematological malignancies and the burden of cancer after kidney transplantationAddresses chemotherapy-associated AKI/CKD in hematologic cancer, GFR estimation and chemotherapy dosing in patients with reduced kidney function, and management priorities and research gaps for onco-nephrology care.Kidney Int · PMID 33276867
  • ADDIKD (2025) — Integrating International Consensus Guidelines for Anticancer Drug Dosing in Kidney Dysfunction (ADDIKD) into everyday practiceProvides GRADE-based, drug-specific dose-adjustment recommendations for anticancer agents in kidney dysfunction (illustrated for methotrexate, cisplatin, carboplatin and nivolumab); the recommendations build on Part 1's standardised CKD-EPI eGFR assessment rather than Cockcroft-Gault creatinine clearance.EClinicalMedicine · PMID 40290844
  • ADDIKD (2025) — Aligning kidney function assessment in patients with cancer to global practices in internal medicineThree consensus recommendations: assess kidney function by GFR (measured GFR or CKD-EPI eGFR), classify it using KDIGO categories, and use this uniform approach to dose anticancer drugs — moving cancer medicine away from Cockcroft-Gault estimated creatinine clearance.EClinicalMedicine · PMID 40290845
  • ADDIKD (2025) — A methodology for determining dosing recommendations for anticancer drugs in patients with reduced kidney functionEstablishes that, where RCT evidence is lacking, anticancer drug dosing recommendations in kidney dysfunction should be derived by critically appraising observational literature via GRADE combined with structured international multidisciplinary consensus voting.EClinicalMedicine · PMID 40290846
  • KDIGO (2013) — Diagnosis, evaluation, and management of acute kidney injury: a KDIGO summary (Part 1)Defines/stages AKI by serum creatinine and urine output; emphasizes avoiding nephrotoxins, maintaining euvolemia/perfusion, dose-adjusting drugs to kidney function, and monitoring high-risk patients — the framework applied to nephrotoxic anti-cancer agents.Crit Care · PMID 23394211
  • KDIGO (2024) — Executive summary of the KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease: known knowns and known unknownsEvaluate and risk-stratify CKD, manage to delay progression and its complications, and practise explicit medication management and drug stewardship — the framework the atlas's G1–G5 eGFR banding and every renal dose-adjustment recommendation sit inside. Because the guideline excludes dialysis and transplant recipients by its own statement of scope, its recommendations do not carry to those settings, where this atlas's dialyzability and post-transplant guidance rests on other sources.Kidney Int · PMID 38519239
  • KDIGO (2021) — Executive summary of the KDIGO 2021 Guideline for the Management of Glomerular DiseasesProvides the staging/treatment framework for drug-associated glomerular lesions (e.g., bisphosphonate- and interferon-related collapsing FSGS, VEGF-inhibitor podocytopathy/proteinuria), including immunosuppression and supportive RAAS-blockade strategies.Kidney Int · PMID 34556300
  • KDIGO (2024) — Executive summary of the KDIGO 2024 Clinical Practice Guideline for the Management of ANCA-Associated VasculitisUpdates immunosuppressive induction (rituximab/cyclophosphamide), incorporates avacopan and lower-dose or glucocorticoid-sparing regimens — the management framework for drug- and checkpoint-inhibitor-associated ANCA/pauci-immune glomerulonephritis.Kidney Int · PMID 38388147
  • KDIGO (2024) — Executive summary of the KDIGO 2024 Clinical Practice Guideline for the Management of Lupus NephritisUpdates first-line lupus nephritis therapy to combination immunosuppression with the addition of belimumab or a calcineurin inhibitor (voclosporin) — informs management of immune-complex/lupus-like glomerulonephritis encountered with immunotherapy.Kidney Int · PMID 38182299
  • KDIGO (2025) — Executive summary of the KDIGO 2025 Clinical Practice Guideline for the Management of Immunoglobulin A Nephropathy (IgAN) and Immunoglobulin A Vasculitis (IgAV)Encourages liberal kidney biopsy and stricter proteinuria control (<0.5 g/d, ideally <0.3 g/d) with RAAS blockers, SGLT2 inhibitors, and targeted-release budesonide — the framework for IgA-dominant glomerular lesions, including those triggered by immune-modulating cancer therapy.Kidney Int · PMID 40975525

References

6 peer-reviewed references. Citation metadata via PubMed / NLM.

  1. 1.Hypoalbuminemia in children with acute lymphoblastic leukemia: relation to asparaginase therapy and impact on high dose methotrexate elimination.Christensen SR et al · Cancer Chemother Pharmacol · 2024 · PMID 39305296
  2. 2.Asparaginase-associated toxicity in children with acute lymphoblastic leukemia.Hijiya N et al. · Leuk Lymphoma · 2016 · PMID 26457414
  3. 3.Adverse reactions of L-asparaginase.Cairo MS · Am J Pediatr Hematol Oncol · 1982 · PMID 6959544
  4. 4.Asparaginase-associated hyperammonemia.Raja RA et al. · Haematologica · 2025 · PMID 40270200
  5. 5.Asparaginase toxicity in Hispanic adult and pediatric patients with acute lymphoblastic leukemia: current understanding.Alqahtani A et al. · Expert Opin Drug Metab Toxicol · 2023 · PMID 37410014
  6. 6.Onconephrology.Kala J et al. · Crit Care Clin · 2021 · PMID 33752861
Educational monograph from NephTox (nephtox.com). Not medical advice — verify against current guidelines before any clinical decision.