Doxorubicin


Article Author:
Kelly Johnson-Arbor


Article Editor:
Ramin Dubey


Editors In Chief:
Chaddie Doerr


Managing Editors:
Orawan Chaigasame
Carrie Smith
Abdul Waheed
Frank Smeeks
Kristina Soman-Faulkner
Benjamin Eovaldi
Radia Jamil
Sobhan Daneshfar
Saad Nazir
William Gossman
Pritesh Sheth
Hassam Zulfiqar
Navid Mahabadi
Steve Bhimji
John Shell
Matthew Varacallo
Ahmad Malik
Mark Pellegrini
James Hughes
Beata Beatty
Hajira Basit
Phillip Hynes


Updated:
5/30/2019 8:56:57 PM

Indications

Doxorubicin is an antibiotic derived from the Streptomyces peucetius bacterium. It has wide use as a chemotherapeutic agent since the 1960s. Doxorubicin is part of the anthracycline group of chemotherapeutic agents; other anthracyclines include daunorubicin, idarubicin, and epirubicin. Commonly, doxorubicin is used in the treatment of solid tumors in adult and pediatric patients. Doxorubicin may be used to treat soft tissue and bone sarcomas as well as cancers of the breast, ovary, bladder, and thyroid. It is also used in the treatment of acute lymphoblastic leukemia, acute myeloblastic leukemia, Hodgkin lymphoma, and small cell lung cancer. The liposomal formulation of doxorubicin is FDA-approved for the treatment of ovarian cancer in patients who have failed platinum-based chemotherapy, AIDS-related Kaposi sarcoma, and multiple myeloma.[1][2][3][4]

Mechanism of Action

The primary mechanism of action of doxorubicin involves the drug’s ability to intercalate within DNA base pairs, causing breakage of DNA strands and inhibition of both DNA and RNA synthesis. Doxorubicin inhibits the enzyme topoisomerase II, causing DNA damage and induction of apoptosis. When combined with iron, doxorubicin also causes free radical-mediated oxidative damage to DNA, further limiting DNA synthesis. Iron chelators, such as dexrazoxane, may prevent the free radical formation by limiting the binding of doxorubicin with iron.

Administration

Doxorubicin is administered intravenously and is commonly given in 21-day intervals. The drug is easily recognizable in its liquid form due to its highly pigmented, reddish appearance. Doxorubicin is incompatible with heparin and fluorouracil and can cause precipitation if mixed with these drugs. While doxorubicin may be administered rapidly (over 15 to 20 minutes), slow administration of the liposomal formulation (Doxil) is recommended to reduce the risk of infusion reactions. Doxorubicin should be stored in a refrigerated area and should be protected from light before administration. Doxorubicin exhibits rapid distribution into tissues and has an elimination half-life of up to 48 hours. Doxorubicin undergoes enzymatic reduction and is eliminated through biliary excretion.

Adverse Effects

Adverse reactions are common after doxorubicin administration and may include fatigue, alopecia, nausea and vomiting, and oral sores. Bone marrow suppression and an increased risk of secondary malignancy diagnoses may occur. Doxorubicin extravasation during intravenous administration can result in severe tissue ulceration and necrosis which worsens over time. Doxorubicin is also associated with significant cardiac toxicity, which limits the long-term use of the drug. The mechanism of action of doxorubicin-induced cardiac toxicity differs from the drug’s antitumor mechanism and involves increased oxidative stress, down-regulation of cardiac-specific genes, and induction of cardiac myocyte apoptosis by doxorubicin. The acute cardiac toxicity of doxorubicin occurs within days of the drug’s administration and occurs in approximately 11% of patients who receive the drug. Acute cardiac toxicity manifests as a reversible myopericarditis, left ventricular dysfunction, or arrhythmias. Doxorubicin-related arrhythmias occur in up to 26% of patients who receive the therapy and can include sinus tachycardia, premature atrial and ventricular contractions, and supraventricular tachycardia. Rarely, acute left ventricular dysfunction can occur after doxorubicin administration; this condition is reversible. Chronic, late cardiac toxicity may also occur after doxorubicin administration and is the most serious and potentially lethal adverse effect associated with doxorubicin therapy. The incidence of chronic doxorubicin cardiac toxicity is approximately 1.7%. Doxorubicin-induced irreversible cardiomyopathy occurs within a few months of the end of treatment but has also been reported to occur up to twenty years after treatment termination. Congestive heart failure may also occur. Risk factors for doxorubicin-induced congestive heart failure include a higher cumulative drug dose, extremes of age, combination chemotherapy with other cardiotoxic drugs, pre-existing left ventricular dysfunction, hypertension, and previous radiation to the mediastinal region. When congestive heart failure develops after doxorubicin administration, the 1-year mortality rate is approximately 50%.[5][6][7]

Contraindications

Doxorubicin is frequently listed as a contraindication to hyperbaric oxygen therapy (HBO). Animal studies of the combined administration of HBO and doxorubicin have shown various results, leading to controversy as to whether HBO is truly contraindicated in patients receiving the drug. HBO was studied in 1985 along with the use of antioxidants, as a potential nonsurgical remedy for skin necrosis due to doxorubicin extravasation. In this study, researchers fed groups of rats antioxidants (beta-carotene and/or butylated hydroxytoluene (BHT), a common food preservative and known free radical scavenger). Subsequently, the rats were anesthetized and injected intradermally with doxorubicin. Some rats were then exposed to HBO at 2.5 ATA after the doxorubicin injections. The rats that were fed BHT prior to doxorubicin injection exhibited improved wound healing. The group of rats that received HBO after doxorubicin injection experienced an 87% mortality rate, which the authors attributed to the formation of free radicals by both HBO and doxorubicin. While the results of this single study suggest that the concurrent administration of HBO and doxorubicin may be associated with increased mortality, subsequent studies have not demonstrated an increase in mortality or cardiac toxicity after administration of HBO and doxorubicin. Additionally, the effects of HBO after remote doxorubicin administration are unknown. It may be safe to administer HBO after doxorubicin has been cleared from the body, in other words after five to six elimination half-lives, or 12 days), but additional studies are needed for further exploration of this topic.

Monitoring

Baseline (pre-treatment) and regular monitoring of cardiac function, through the use of echocardiography or multi-gated radionuclide angiography (MUGA scan), is recommended for patients who are undergoing treatment with doxorubicin. Patients who exhibit a decrease in left ventricular ejection fraction during doxorubicin treatment should have the drug discontinued. Endomyocardial biopsy may also be utilized to diagnose doxorubicin-induced cardiomyopathy; findings include loss of myofibrils and cytoplasm vacuolization. Unfortunately, there is no specific treatment available for patients who are diagnosed with doxorubicin-induced cardiomyopathy. Diuretics and beta-adrenergic blockers may be used, but these treatments do not improve overall patient prognosis. Cardiac transplantation has been successfully used in some patients with doxorubicin-induced cardiomyopathy. Since higher cumulative doxorubicin doses are a risk factor for the development of cardiomyopathy, dose limitation is advocated to reduce cardiotoxicity. Antioxidant drugs (including amlodipine and carvedilol) have been studied as potential preventive agents to reduce the incidence of doxorubicin-induced cardiotoxicity. Dexrazoxane, an iron chelator, may be co-administered with doxorubicin to reduce the cardiotoxicity of the drug. However, administration of dexrazoxane may induce myelosuppression which can be potentiated by doxorubicin, so its clinical efficacy remains in question.

Enhancing Healthcare Team Outcomes

Doxorubicin is a frequently used chemotherapeutic agent for the treatment of many solid tumors. While the drug is effective, it does have one serious adverse effect. Healthcare workers, including the primary care provider and nurse practitioner who refer patients to the oncologist, need to perform a cardiac screen test on patients with risk factors for heart disease. The reason is that doxorubicin can cause irreversible cardiomyopathy what may occur at any time after treatment

Baseline (pre-treatment) and regular monitoring of cardiac function, through the use of echocardiography or multi-gated radionuclide angiography (MUGA scan), is recommended for patients who are undergoing treatment with doxorubicin. Patients who exhibit a decrease in left ventricular ejection fraction during doxorubicin treatment should have the drug discontinued. Since higher cumulative doxorubicin doses are a risk factor for the development of cardiomyopathy, dose limitation is advocated to reduce cardiotoxicity.[1][8][9]


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Doxorubicin - Questions

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A male with prostate cancer was treated with combination chemotherapy. Six months after completing his therapy, he presented to the emergency department with dyspnea and fatigue. Work up revealed that he has congestive heart failure. Which agent is most likely to cause this complication?



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A patient develops congestive heart failure after starting a chemotherapy drug. Which agent is most likely to cause this complication?



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Cardiotoxicity is seen with which of the following agents?



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A patient with a lymphoma is being treated with combination chemotherapy. After a month, the patient is found to have tachycardia and dyspnea on exertion. What is the most likely agent responsible?



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Which of the following agents has cardiac toxicity as its limiting factor?



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Patients receiving initial treatment with doxorubicin hydrochloride should be informed of which of the following?



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Which of the following types of chemotherapy is not matched correctly with one of its side effects?



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Which medication is associated with cardiac toxicity?



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The anti-cancer drug, doxorubicin, is associated with which of the following?



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A patient develops congestive heart failure after starting chemotherapy. Which of the following agents is associated with the development of cardiomyopathy?



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Which of the following is a known side effect of doxorubicin therapy?



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What is the feared complication of the drug doxorubicin?



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Which of the following cancer chemotherapeutic agents can cause cardiomyopathy?



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Which of the following medications can result in cardiomyopathy?



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Which is a known side effect of doxorubicin?



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Which drug is cardiotoxic?



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A patient is starting chemotherapy with doxorubicin. Which one of the following is a teaching point for this medication?



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Which of the following chemotherapy agents can cause an irreversible, dose-related cardiomyopathy and has a lifetime dose maximum?



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What is the description of the liposomal technology used with doxorubicin?



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Which adverse effect is associated with doxorubicin?



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Which one of the following conditions is a possible indication for doxorubicin?



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A patient with acute lymphocytic leukemia is being treated with doxorubicin. Which of the following are possible adverse effects? Select all that apply.



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Doxorubicin - References

References

Yu AF,Chan AT,Steingart RM, Cardiac Magnetic Resonance and Cardio-Oncology: Does T{sub}2{/sub} Signal the End of Anthracycline Cardiotoxicity? Journal of the American College of Cardiology. 2019 Feb 26;     [PubMed]
Marcq G,Jarry E,Ouzaid I,Hermieu JF,Henon F,Fantoni JC,Xylinas E, Contemporary best practice in the use of neoadjuvant chemotherapy in muscle-invasive bladder cancer. Therapeutic advances in urology. 2019 Jan-Dec;     [PubMed]
Tantari M,Barra F,Di Domenico S,Ferraioli D,Vellone VG,De Cian F,Ferrero S, Current state of the art and emerging pharmacotherapy for uterine leiomyosarcomas. Expert opinion on pharmacotherapy. 2019 Feb 6;     [PubMed]
Koleini N,Nickel BE,Edel AL,Fandrich RR,Ravandi A,Kardami E, Oxidized phospholipids in Doxorubicin-induced cardiotoxicity. Chemico-biological interactions. 2019 Jan 29;     [PubMed]
Oikonomou E,Anastasiou Μ,Siasos G,Androulakis E,Psyrri A,Toutouzas K,Tousoulis D, Cancer Therapeutics-Related Cardiovascular Complications. Mechanisms, Diagnosis and Treatment. Current pharmaceutical design. 2019 Jan 10;     [PubMed]
Luu AZ,Chowdhury B,Al-Omran M,Teoh H,Hess DA,Verma S, Role of Endothelium in Doxorubicin-Induced Cardiomyopathy. JACC. Basic to translational science. 2018 Dec;     [PubMed]
Pipicz M,Demján V,Sárközy M,Csont T, Effects of Cardiovascular Risk Factors on Cardiac STAT3. International journal of molecular sciences. 2018 Nov 12;     [PubMed]
Abdullah CS,Alam S,Aishwarya R,Miriyala S,Bhuiyan MAN,Panchatcharam M,Pattillo CB,Orr AW,Sadoshima J,Hill JA,Bhuiyan MS, Doxorubicin-induced cardiomyopathy associated with inhibition of autophagic degradation process and defects in mitochondrial respiration. Scientific reports. 2019 Feb 14;     [PubMed]
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