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Antibody-drug conjugate (CD19/PBD)

Loncastuximab tesirine

Zynlonta · LON

CD19-directed pyrrolobenzodiazepine ADC whose capillary-leak-type edema, effusions and fluid overload are the renal-relevant signals in DLBCL.

ModeratePyrrolobenzodiazepine ADC era · approved 2021
Relapsed/refractory large B-cell lymphoma (DLBCL not otherwise specified, high-grade B-cell lymphoma) after >=2 systemic therapies

Signature kidney injury

Prerenal / Hemodynamic AKI

Edema and effusions (pleural, pericardial, peritoneal) are characteristic PBD-payload toxicities and were common in LOTIS-2; the resulting fluid shifts and AKI are not separately quantified. Tumor lysis is an additional consideration in responding lymphoma.

Source: Caimi et al., Lancet Oncol 2021 (LOTIS-2)

Mechanism of kidney injury

The PBD payload causes endothelial/vascular injury producing a capillary-leak-type syndrome with peripheral edema, serosal effusions and fluid extravasation. Intravascular volume depletion from third-spacing drives prerenal azotemia, while fluid overload can complicate management; severe capillary leak can cause hemodynamic AKI. The CD19 target is restricted to B cells, so the renal injury is payload-mediated and hemodynamic rather than a direct antibody-target nephrotoxicity. Tumor lysis can add crystalline injury in responders.

Clinical presentation

Progressive peripheral edema, weight gain, dyspnea from pleural/pericardial effusions and ascites; a prerenal creatinine rise from intravascular depletion despite total-body fluid excess. TLS labs may appear in responders.

Onset

Edema/effusions accumulate over cycles; prerenal changes track the fluid shifts.

Reversibility

Reversible

Anticancer mechanism

Antibody-drug conjugate of an anti-CD19 antibody linked to a pyrrolobenzodiazepine (PBD) dimer payload. After CD19 binding and internalization, the released PBD cross-links DNA, causing death of malignant B cells in diffuse large B-cell lymphoma.

Management

Manage edema/effusions with judicious diuresis (avoiding worsening prerenal physiology), drainage of symptomatic effusions, and dose modification/delay. Restore effective circulating volume for prerenal AKI. Treat tumor lysis with hydration, urate-lowering therapy and electrolyte correction. Renal effects generally improve as fluid shifts resolve.

Risk factors

  • Pre-existing cardiac/renal dysfunction or hypoalbuminemia
  • Higher cumulative ADC exposure
  • High tumor burden (tumor-lysis risk)
  • Concurrent nephrotoxins

Prevention

  • Monitor weight, edema and effusions each cycle; premedicate (dexamethasone) per label to reduce fluid accumulation
  • Assess volume status carefully before diuresis (third-spacing with intravascular depletion)
  • Tumor-lysis risk assessment with hydration +/- urate-lowering therapy
  • Dose delay/reduction for significant edema/effusions
Note · The renal link is indirect — payload-driven capillary-leak edema/effusions cause fluid shifts and prerenal AKI rather than a direct target nephrotoxicity; tumor lysis adds risk in responders.

Clinical depth

Renal dose adjustment

No dose adjustment for mild-moderate renal impairment; severe impairment/ESKD not well studied. As an ADC, clearance is not primarily renal.

Dialyzability & ESKD dosing

A large antibody-drug conjugate; not dialyzable. ESKD dosing is not established.

Differential diagnosis

Distinguish capillary-leak/effusion-related prerenal AKI (intravascular depletion despite edema) from cardiac failure, nephrotic-range proteinuria, and tumor-lysis nephropathy. Assess effective circulating volume before diuresing.

Monitoring

  • Weight, edema and effusion assessment each cycle
  • Serum creatinine, albumin and electrolytes
  • TLS labs in responders (uric acid, phosphate, potassium)
  • Liver tests and CBC per schedule

Key trials & series

  • LOTIS-2 (Caimi, Lancet Oncol 2021) — registrational single-arm trial characterizing edema/effusion toxicity

Clinical pearls

  • PBD-payload capillary leak causes total-body fluid excess with intravascular depletion — diurese cautiously.
  • Edema and serosal effusions are the signature ADC toxicities to track each cycle.
  • Premedication (dexamethasone) mitigates fluid accumulation.
  • As an ADC it is not dialyzable; clearance is not renal.

Where it strikes

Nephron segments

Vasculature / Endothelium

Glomerular & peritubular capillaries

Injury signatures

Prerenal / Hemodynamic AKIElectrolyte Wasting

Beyond the kidney

Class-level context for the major non-renal toxicities of antibody-drug conjugate (cd19/pbd)s.

Hematologic

Cytopenias, thrombosis, TMA

  • Myelosuppression (payload-dependent)

Ophthalmic

Keratopathy, uveitis, retinopathy

  • Keratopathy (belantamab, mirvetuximab, tisotumab)

Pulmonary

Pneumonitis, ILD, effusions, hypertension

  • Interstitial lung disease (deruxtecan ADCs)

Neurologic

Neuropathy, encephalopathy, ICANS, PRES

  • Peripheral neuropathy (MMAE payloads)

Related agents

Other agents sharing the same signature kidney injury.

Bendamustine

Treanda · Alkylator

Profile

Tumor lysis-mediated AKI is the principal risk; TMA is rare.

PRETMALYTE
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Dacarbazine

DTIC · Alkylator

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Rare hepatic veno-occlusive disease; minimal direct renal injury.

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Capecitabine

Xeloda · Pyrimidine analog (oral 5-FU)

Profile

Diarrhea-driven prerenal AKI; dose-adjust for CrCl.

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