Nilotinib is a selective tyrosine kinase receptor inhibitor used in the therapy of chronic myelogenous leukemia. Nilotinib therapy is associated with transient elevations in serum aminotransferase levels and rare instances of clinically apparent acute liver injury.
Nilotinib (nye loe' ti nib) is a selective inhibitor of the abnormal tyrosine kinase receptor known as bcr-abl, formed by the reciprocal translocation between chromosome 9 and 22, which creates the Philadelphia chromosome that is associated with chronic myelogenous leukemia (CML). The bcr-abl tyrosine kinase receptor is constitutively expressed in leukemic cells and causes unregulated cell growth and proliferation. Nilotinib is a specific inhibitor of bcr-abl and structurally related to imatinib. Like imatinib, nilotinib also blocks the tyrosine kinase activity of the abnormal tyrosine kinase (cKit) that is found in gastrointestinal stromal tumors (GIST) and platelet derived growth factor (PDGF), which is commonly mutated in renal cell carcinoma. Nilotinib received approval for use in the United States in 2007 for treatment of Philadelphia chromosome-positive CML resistant to or intolerant of prior treatment that included imatinib. Indications were subsequently expanded to include newly diagnosed cases of CML in the chronic phase. Nilotinib is available in capsules of 150 and 200 mg under the brand name Tasigna. The recommended initial dose is 400 mg by mouth twice daily, with dose modification based upon tolerance. Side effects are common and include fatigue, diarrhea, anorexia, skin discoloration, rash, hand-foot syndrome, edema, muscle cramps, arthralgias, headache, abdominal discomfort, anemia, cough, and pruritus. Uncommon side effects include QT interval prolongation, heart failure, pancreatitis, tumor lysis syndrome and renal failure.
Elevations in serum aminotransferase levels are common during nilotinib therapy, occurring in up to 70% of patients, but rising to greater than 5 times the upper limit of normal (ULN) in only 4% to 9% of recipients. These abnormalities are usually asymptomatic. If levels are markedly elevated (ALT or AST persistently greater than 5 times ULN or bilirubin more than 3 times ULN), dose adjustment or temporary discontinuation and restarting at a lower dose is recommended. In high doses, nilotinib is also associated with elevations in serum bilirubin, but these are largely in the indirect (unconjugated) fraction and are not associated with serum enzyme elevations or symptoms, resolving with dose adjustment or discontinuation. The majority of patients with marked bilirubin elevations on nilotinib therapy have underlying Gilbert Syndrome. There have been no published case reports of clinically apparent liver injury attributed to nilotinib, but it has been used in a restricted population of patients for a relatively short period of time. The product label does mention hepatitis and jaundice as reported adverse events. Severe tumor lysis syndrome with multiorgan including hepatic failure can occur with nilotinib but is rare. In addition, most other tyrosine kinase receptor inhibitors have been linked to rare instances of clinically apparent liver injury, usually arising after 1 to 8 weeks of treatment and presenting with a hepatocellular or mixed pattern of serum enzyme elevations. Immunoallergic and autoimmune features are uncommon. The liver injury can be severe and lead to acute liver failure. Routine monthly monitoring of liver tests during therapy with tyrosine kinase receptor inhibitors is recommended.
Mechanism of Injury
The cause of the liver injury due to nilotinib is unknown. Nilotinib is metabolized in the liver largely by the cytochrome P450 system, and liver injury may be due to accumulation of a toxic intermediate or from a drug-drug interaction with other medications.
Outcome and Management
Serum aminotransferase elevations above 5 times the upper limit of normal (if confirmed) should lead to dose reduction or temporary cessation. Cross reactivity of the hepatic injury with other tyrosine kinase inhibitors is not common, but can occur. In using this medication, other potentially hepatotoxic agents should be avoided.
REPRESENTATIVE TRADE NAMES
Nilotinib – Tasigna®
Product labeling at DailyMed, National Library of Medicine, NIH
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References updated: 4 February 2014
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DeRemer DL, Ustun C, Natarajan K. Nilotinib: a second-generation tyrosine kinase inhibitor for the treatment of chronic myelogenous leukemia. Clin Ther 2008; 30: 1956-75. PubMed Citation (Review of mechanism of action, pharmacology, clinical efficacy and tolerability of nilotinib based upon analyses of phase II and III trials; most common toxicities were neutropenia and thrombocytopenia, rash, nausea, headache, itching and fatigue. ALT and AST elevations were "infrequent", with values >5 times ULN in 1-4% of patients; instances of hyperbilirubinemia were also observed, but were self-limiting and attributed to Gilbert Syndrome).
Perini GF, Santos FP, Funke V, Ruiz J, Neto BH, Hamerschlak N. Nilotinib post-liver transplantation for acute hepatic failure related to imatinib. Leuk Res 2009; 33: e234-5. PubMed Citation (47 year old woman with CML developed jaundice and confusion after 18 months of imatinib therapy [bilirubin 20 mg/dL, ALT 828 U/L, prothrombin time 24 sec], leading to emergency liver transplantation; later treated with nilotinib without recurrence of liver injury).
Breccia M, Alimena G. Nilotinib therapy in chronic myelogenous leukemia: the strength of high selectivity on BCR/ABL. Curr Drug Targets 2009; 10: 530-6. PubMed Citation (Review of development, mechanism of action, clinical efficacy and safety of nilotinib, a tyrosine kinase receptor inhibitor similar to imatinib; serum bilirubin elevations occurred in 3-16% of patients; no mention of clinically apparent liver injury).
Koren-Michowitz M, le Coutre P, Duyster J, Scheid C, Panayiotidis P, Prejzner W, Rowe JM, et al. Activity and tolerability of nilotinib: a retrospective multicenter analysis of chronic myeloid leukemia patients who are imatinib resistant or intolerant. Cancer 2010; 116: 4564-72. PubMed Citation (88 patients with CML who were intolerant or resistant to imatinib were treated with nilotinib for up to 3 years; 14% developed ALT or Alk P elevations, but none had clinically apparent liver injury, and 5 patients who stopped imatinib because of hepatotoxicity tolerated nilotinib without recurrence).
Saglio G, Kim DW, Issaragrisil S, le Coutre P, Etienne G, Lobo C, Pasquini R, et al.; ENESTnd Investigators. Nilotinib versus imatinib for newly diagnosed chronic myeloid leukemia. N Engl J Med 2010; 362: 2251-9. PubMed Citation (Controlled trial of 2 doses of nilotinib vs imatinib in 846 patients with CML found ALT elevations were more frequent with nilotinib than imatinib [66% and 73% vs 20% for any elevation, 4% and 9% vs 2% for elevations >5 times ULN]; hepatobiliary adverse events occurred in 4 nilotinib [0.7%] and in 1 imatinib [0.4%] recipient; details not given).
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Spataro V. Nilotinib in a patient with postnecrotic liver cirrhosis related to imatinib. J Clin Oncol 2011; 29: e50-2. PubMed Citation (41 year old woman with CML developed jaundice 6 months after starting imatinib [bilirubin 9.6 mg/dL, ALT 1374 U/L, Alk P 163 U/L, prothrombin index 27%, biopsy showing massive necrosis], recovering slowly with residual evidence of portal hypertension and subsequent biopsy showing cirrhosis; started on nilotinib for relapse in CML without worsening of liver tests).
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2011; 12: 841-51. PubMed Citation (Controlled trial of 2 doses of nilotinib vs imatinib for at least 24 months in 846 patients with CML found ALT elevations above 5 times ULN in 4% and 9% of patients on nilotinib vs 3% on imatinib; one patient on nilotinib had a "liver disorder", but no details given).
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Hematol 2012; 95: 409-19. PubMed Citation (Among 34 Japanese patients with CML treated with nilotinib for 36 months, bilirubin elevations occurred in 29% and ALT elevations in 24%, but ALT above 5 times ULN in only 3% [1 patient]).
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adult patients with imatinib-resistant or -intolerant chronic myeloid leukemia in
accelerated phase or blast crisis. Leuk Lymphoma 2012; 53: 907-14. PubMed Citation (Among 371 patients with CML in accelerated phase or blast crisis treated with nilotinib for up to 2 years found ALT elevations in 8% of patients, but levels above 5 times ULN in only 0.5% [2 patients]; serum bilirubin levels were elevated in 23%).
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with hydroxyurea followed by nilotinib in two patients with chronic-phase chronic
myelogenous leukemia. Int J Hematol 2013; 98: 243-6. PubMed Citation (44 year old man with CML in chronic phase developed metabolic acidosis within 10 hours of starting nilotinib [pH 6.9, creatinine 1.4 mg/dL, ALT 26 U/L] and rapidly decreasing white blood cell count [162,000 to 61,000/uL], followed by multiorgan and hepatic failure [bilirubin 4.4 mg/dL, ALT 1031 U/L], autopsy showing massive necrosis).
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pancreatitis. Ann Pharmacother 2013; 47: e3. PubMed Citation (69 year old woman with CML developed abdominal pain within a day of starting nilotinib and was admitted with pancreatitis 6 days later [bilirubin 1.7 mg/dL, ALT normal, lipase 308 U/L], resolving on stopping and not recurring when switched to imatinib).
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2013; 19: 1318-21. PubMed Citation (3 patients with CML and HBsAg carrier state were treated with imatinib [one had been switched to nilotinib] and developed reactivation of hepatitis B 6, 53 and 15 months later [bilirubin normal, 2.7 and 2.5 mg/dL, ALT 1086, 374 and 592 U/L, HBV DNA 229, 13 and 27 million IU/mL]; all three responded to entecavir therapy and were continued on the tyrosine kinase inhibitor).
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