importance of lifetime dose for doxorubicin

Cardiac function should be assessed before patients undergo treatment with doxorubicin and must be monitored throughout therapy to minimize the risk of incurring severe cardiac impairment. The main purpose of the study was to assess the importance of a strategy of administration of conventional/liposomal doxorubicin and a lifetime cumulative dose of doxorubicin for development of acute decompensated heart failure (ADHF) in lymphoma patients with concomitant cardiovascular disorders. Binding of doxorubicin and its major metabolite, doxorubicinol, to plasma proteins is 75% and is independent of plasma concentration of doxorubicin up to 1.1 µg/mL. Doxorubicin (Adriamycin®) is a cytotoxic chemotherapy drug and an antitumor antibiotic in the anthracycline group. The recommended dose of … Despite a 50% increase of the doxorubicin dose-intensity, the high-dose regimen failed to demonstrate any impact on survival in patients with ASTS. This indicated that in the described scenario, doxorubicin, by inhibiting the cell cycle, acted as a sensitizer to a proapoptotic trigger provided by MN-anti–miR-10b. Doxorubicin is part of the anthracycline group of chemotherapeutic agents. Doxorubicin is largely excreted in the bile and an elevated bilirubin concentration is an indication for reducing the dose. The recommended lifetime cumulative dose limit is 550 mg doxorubicin/m2 body surface area. CLINICAL USE. Doxorubicin does not cross the blood brain barrier. Allergic reactions (anaphylaxis) Severe cough Doxorubicin is the best known and most widely used member of the anthracycline antibiotic group of anticancer agents. Doxorubicin comes as a solution (liquid) or as a powder to be mixed with liquid to be injected intravenously (into a vein) by a doctor or nurse in a medical facility. Conclusions: At interim analysis, dexrazoxane did not reduce PFS in patients with STS treated with doxorubicin. † The recommended dose of doxorubicin, when administered in combination with other chemotherapy drugs, is 40 to 75 mg/m2 intravenously every 21 to 28 days. It was created to analyse the importance of a strategy of administration of conventional/liposomal doxorubicin and a lifetime doxorubicin dose for development of acute decompensated heart failure (ADHF) as a reason of premature chemotherapy discontinuation. Avoid or Use Alternate Drug. Doxorubicin (DOX)-induced cardiotoxicity in chemotherapy is a major treatment drawback. This largely limited the clinical use of DOX. The dosage of doxorubicin, for example, varies based upon the type of cancer being treated. 2 Elimination. Doxorubicin Hydrochloride (doxorubicin hydrochloride) dose ... tip www.pdr.net. The goals of palliative therapy are to control local tumor growth, relieve symptoms, and improve and preserve quality of life. The questionnaire assesses important functioning domains (e.g., physical, emotional, social) and common cancer symptoms (e.g., fatigue, pain, nausea, vomiting, appetite loss). MISSED DOSE: For the best possible benefit, it is important to receive each scheduled dose of this medication as directed. Patients must not have received a cumulative dose of doxorubicin of greater than 360 mg/m^2 or epirubicin of greater than 640 mg/m^2. Do not substitute DOXIL for doxorubicin HCl injection.. Do not administer as an undiluted suspension or as an intravenous bolus [see WARNINGS AND PRECAUTIONS].. Plasma clearance is ranges from 324 mL/min/m 2 to 809 mL/min/m 2. DOSE IN NORMAL RENAL FUNCTION. The probability of developing cardiomyopathy is estimated to be 1 to 2% at a total cumulative dose of 300 mg/m 2 of doxorubicin, 3 to 5% at a dose of 400 mg/m 2, 5 to 8% at a dose of 450 mg/m 2, and 6 to 20% at a dose of 500 mg/m 2, when doxorubicin is administered every 3 weeks. Varies according to local protocol. PHARMACOKINETICS. Hruby M, Konak C, Ulbrich K. Polymeric micellar pH-sensitive drug delivery system for doxorubicin. Doxorubicin is a cancer medication that interferes with the growth and spread of cancer cells in the body. Doxorubicin is used to treat different types of cancers that affect the breast, bladder, ovary, thyroid, stomach, lungs, bones, nerve tissues, muscles, joints, and soft tissues. The incidence of cardiotoxicity has been estimated to vary from 5% for cumulative doses of 400 mg/m 2 to 48% in those exposed to 700 mg/m 2. Breast cancer. in vivo. NOTE: In a phase III trial comparing conventional doxorubicin to liposomal doxorubicin (Myocet; not available in the United States), the estimated median cumulative lifetime dose of doxorubicin for the first appearance of cardiotoxicity was > 2220 mg/m2 for the liposomal doxorubicin and 480 mg/m2 for conventional doxorubicin. Involvement of cardio-oncologists is beneficial for the monitoring and safe use of high-dose anthracyclines in STS. Patients receiving doxorubicin therapy must receive close follow-up and monitoring of blood counts, liver function, and heart function studies. 7. Clinical trials on the cardioprotective effects of … The undesirable toxicity of chemotherapeutic agents to normal tissues affects their therapeutic efficiency. Reduce the total cumulative lifetime dose to 400 to 450 mg/m 2 if elderly, prior mediastinal radiation, hypertensive cardiomegaly, concurrent therapy with high dose cyclophosphamide and some other cytotoxic drugs (e.g. CHF was seen in 1% and 7% and the cumulative lifetime doxorubicin dose was 785 and 570 mg/m 2 (p = 0.0001) respectively in the NPLD and conventional doxorubicin arms (Winer et al 2000). Doxorubicin may be used to treat soft tissue and bone sarcomas and cancers of the breast, ovary, bladder, and thyroid. 29. Anthracylines are potent cytotoxic antibiotics with broad clinical use as anticancer agents. Talk with your doctor and family members or friends about deciding to join a study. Lifetime cumulative dose for doxorubicin is generally limited to 450 mg/m 2 and subjects with previous doxorubicin were excluded from pivotal LTLD studies. Despite the progress in the development of new anticancer strategies, cancer is rapidly spreading around the world and remains one of the most common diseases. Personalized chemotherapy is dependent on the identification and validation of biomarkers that can predict treatment outcome and/or risk of toxicity. Isolated from cultures of Streptomyces peucetius var. Adjuvant Breast Cancer . breast and ovarian, lung and gastric, leukemia and lymphoma, h…. Several palliative therapeutic options exist for patients with unresectable intrahepatic cholangiocarcinoma. Use: Pediatric tumors (e.g., neuroblastoma) Renal Dose Adjustments. However, its dose–response cardiotoxic side effects are known to lead to doxorubicin-induced cardiomyopathy (DIC), which severely limits the antitumor therapeutic utility of DOX (1, 2).Although several mechanisms behind the pathological changes in the heart were … The most common side effects of Doxorubicin include: hair loss (alopecia). Your hair may re-grow after your treatment. darkening of your nails or separation of your nails from your nailbed nausea vomiting lack of appetite or increased thirst bruise or bleed more easily abnormal heart beat The purpose of this study was to evaluate the safety profile of oclacitinib given in combination with either carboplatin or doxorubicin in tumor-bearing dogs. ONS is committed to promoting excellence in oncology nursing and the transformation of cancer care. The total dose of doxorubicin received during a person’s life should be ideally less than 450mg per square meter (of the body surface). It is For more than 40 years, doxorubicin has been widely used in the treatment of solid and hematological tumors. These risks, which are based on hematologic toxicity, are currently assumed to be … 2.1 Recommended Dose. Fertility: Treatment with doxorubicin may produce gonadal suppression, resulting in amenorrhea or azoospermia.11 Pregnancy: Doxorubicin is classed as FDA Pregnancy Category D.24 There is positive evidence of human … It is of great significance to find a novel strategy to reduce DOX-related cardiac injury. Side Effects. Liver Dose Adjustments We compared three HER2 laboratory methods: immunohistochemistry (IHC), fluorescence in situ hybridization (FISH) and polymerase chain reaction (PCR), to predict disease-free survival (DFS) and overall survival … However, the differential risk for cardiotoxicity between daunorubicin and doxorubicin has not been rigorously evaluated among survivors of childhood cancer. Following iv administration of a single 10- to 40-mg/sq m dose of doxorubicin hydrochloride as a liposomal injection in patients with AIDS-related Kaposi's sarcoma, the initial plasma half-life (t1/2 alpha) of doxorubicin averaged 3.76-5.2 hours while the terminal elimination half-life (t1/2 beta) averaged 39.1-55 hours. adult iv: 60-70mg/m2 once every 21 days as a single agent; 20-…. Aerobic exercise ameliorates doxorubicin-induced cardiotoxicity. Cardiotoxicity occurred in 10% of those who received NPLD and 26% of those who received conventional doxorubicin (p = 0.003). A high dose of doxorubicin is more likely to produce heart damage. in vitro. The instrument is composed of 30 items. Determination of quality of life (QOL) of NOX66 in combination with doxorubicin. Doxorubicin is a chemotherapy medication used to treat cancers like breast cancer ,bladder cancer, lymphoma and acute lymphocytic leukemia. The dose intensities of doxorubicin and methotrexate were significantly correlated with the clinical results, while that of cisplatinum was not. Oclacitinib was administered at the label dose of 0.4–0.6 mg/kg PO q12h in combination with either carboplatin at 250-300 mg/m2 or doxorubicin at 30 mg/m2 IV q21d. STORAGE: Consult the product instructions and your pharmacist for storage details. Dudka J, Gieroba R, Korga A, et al. The use of resveratrol may mitigate the doxorubicin-induced cardiotoxic effects. what is it used for. 2005;103(1): 137–148. Ovarian Cancer. Different effects of resveratrol on dose-related doxorubicin-induced heart and liver toxicity. Daunorubicin is used to treat a particular form of acute myeloid leukaemia with other chemotherapy medications (AML; a type of cancer of the white blood cells). a total cumulative dose of 300 mg/m2 of doxorubicin, 3 to 5% at a dose of 400 mg/m2, 5 to 8% at 450 mg/m2 and 6 to 20% at 500 mg/m2. However, the differential risk for cardiotoxicity between daunorubicin and doxorubicin has not been rigorously evaluated among survivors of childhood cancer. Purpose HER2 is a clinically important tumor marker in breast cancer; however, there is controversy regarding which method reliably measures HER2 status. The ZINECARD dose is dependent upon the dose of doxorubicin [see Dosage and Administration (2.2)]. Choosing to participate in a study is an important personal decision. Due to the side effect profile and toxicity of doxorubicin, patients are only allowed a lifetime dose of 550 mg/m^2. Anthracyclines have become one of the most important drugs for the treatment of both hematological and solid tumors [1–3].Conventional anthracyclines have a relatively low therapeutic index [].The risk of cardiotoxicity increases with higher cumulative doses of anthracyclines [4–7].It is recommended that the cumulative life time dose of doxorubicin … Story continues. The cumulative dosage of doxorubicin was 955 mg/m2 at the end of the 15 courses.  Pegylated liposomal doxorubicin (PLD) is a formulation of doxorubicin in polyethylene glycol (PEG) coated Stealth® liposomes. Drug Interactions There was no significant change in the pharmacokinetics of doxorubicin (50 mg/m 2 ) and its predominant metabolite, doxorubicinol, in the presence of dexrazoxane (500 mg/m 2 ) in a crossover study in cancer patients. The estimated risk of developing cardiomyopathy (when doxorubicin is given every 3 weeks) is 1% to 2% at a cumulative dose of 300 mg/m2, 3% to 5% at a cumulative dose of 400 mg/m2, and 6% to 20% at a cumulative dose of 500 mg/m2. It is usually given once every 21 to 28 days. The dose should be based on body weight for children with a BSA < 0.5 m2. Background. There was a significant dose dependent LDH release with increasing concentrations of the cobalt complexes and their standardized dose combinations. The generic name of Doxorubicin Hydrochloride is doxorubicin hydrochloride. 28. Doxorubicin is an antibiotic derived from the Streptomyces peucetius bacterium. At 96 hours, median doxorubicin concentrations in KS lesions were 4.3 and 3.3 µg/g tissue in the four patients receiving 10 mg/m 2 and the four patients receiving 20 mg/m 2 dose, respectively; median concentration in the normal skin was 1.4 µg/g tissue in the 10 mg/m 2 dose group, and 0.7 µg/g tissue in the 20 mg/m 2 group. Conception and contraception Manufacturer advises effective contraception during and for at least 6 months after treatment in men or women. Doxorubicin may be used to treat soft tissue and bone sarcomas and cancers of the breast, ovary, bladder, and thyroid. Palliative therapies include biliary decompression, systemic chemotherapy, and radiation therapy. Von Hoffet al (21), in a retrospective analysis, found that when a patient receives a cumulative dose of doxorubicin at 400, 550 and 2700 /mgm , the incidence of cardiotoxicity is 3, 7 and 18%, respectively, with dose-limiting toxicity. It is recommended that the total cumulative dose of doxorubicin for adults aged 70 or older be restricted to 450 mg/m2 body surface area. The recommended dose of DOXIL is 50 mg/m² intravenously over 60 minutes every 28 days until disease … 6 Terms. Objective: To evaluate the effects of protocol and dose intensity (DI) on treatment outcomes for carboplatin and doxorubicin-based chemotherapy protocols. Single-agent chemotherapy consisting of weekly doxorubicin was administered for 15 courses (average dose 29 mg/m2/week) and resulted in a complete remission after nine courses. NOTE: In a phase III trial comparing conventional doxorubicin to liposomal doxorubicin (Myocet; not available in the United States), the estimated median cumulative lifetime dose of doxorubicin for the first appearance of cardiotoxicity was > 2220 mg/m2 for the liposomal doxorubicin and 480 mg/m2 for conventional doxorubicin. Life-threatening CHF is the most severe form of anthracycline-induced cardiomyopathy and represents the cumulative dose-limiting toxicity of the drug. Although doxorubicin chemotherapeutic drug is commonly used to treat various solid and hematological tumors, its clinical use is restricted because of its adverse effects on the normal cells/tissues, especially cardiotoxicity. The low complete response rate, the high incidence of leiomyosarcomas, and liver metastases may in part explain these results. Doxorubicin, a good example, is used to treat a wide spectrum of hematologic malignancies and solid tumors. The Oncology Nursing Society (ONS) is a professional association that represents 100,000 nurses and is the professional home to more than 35,000 members. Meanwhile, cumulative doses of liposomal doxorubicin up to 1450 mg/m 2 has been given to patients without findings of cardiac toxicity [52] . what is doxorubicin. The cumulative dose risk factor is especially important. Many cytotoxic chemotherapy agents, … DOXOrubicin . Important things to remember about the side effects of doxorubicin (liposomal): ... doxorubicin, during your lifetime. Doxorubicin- (DOX-) related cardiac injury impairs the life quality of patients with cancer. At the same time, the problem of its cardiotoxicity remains unresolved, despite the … The first patient has received their first dose of AVA6000 at The Royal Marsden NHS Foundation Trust, London. 3 “Pegylation” is the process whereby the doxorubicin-containing liposomes are enclosed within a PEG layer. The total cumulative lifetime dose of doxorubicin is 450 to 500 mg/m 2. The estimated risk of developing cardiomyopathy (when doxorubicin is given every 3 weeks) is 1% to 2% at a cumulative dose of 300 mg/m2, 3% to 5% at a cumulative dose of 400 mg/m2, and 6% to 20% at a cumulative dose of 500 mg/m2. Epirubicin is a semisynthetic derivative of doxorubicin which has been extensively evaluated in patients with breast cancer. Your doctor will check your heart function (with an ECHO test) before you may take any Doxorubicin and will monitor your heart closely during your treatment. Molecular weight :580. conventional doxorubicin in which a polyethylene glycol layer surrounds the doxorubicin-containing liposome as the result of a process termed pegylation. This has motivated efforts to develop optimal dosage regimes that maximize anti-tumor activity while minimizing cardiac toxicity, which is correlated with peak plasma concentration. %Excreted unchanged in urine : <15. Doxorubicin is given through an intravenous (IV, into a vein) infusion or injection. Pegylated liposomal doxorubicin (PLD) is a formulation of doxorubicin in polyethylene glycol (PEG) coated Stealth® liposomes. Low-dose doxorubicin also avoids the harsh side effects of high-dose doxorubicin, potentially offering patients a better quality of life. These results indicate that maximal dose intensification of doxorubicin and methotrexate is an important determinant of treatment outcome for patients with osteosarcoma. The recommended dose of doxorubicin is 60 mg/m 2 administered as an intravenous bolus on day 1 of each 21 day treatment cycle, in combination with cyclophosphamide, for a total of four cycles [see Clinical Studies (14)].. Metastatic Disease, Leukemia, or Lymphoma . It is important to note that pegylated liposomal doxorubicin should not be substituted for conventional doxorubicin on a milligram per milligram basis, as conventional doxorubicin is administered at doses of 60–90 mg/m 2 every 3 weeks, while the current FDA-recommended dose of pegylated liposomal doxorubicin is 50 mg/m 2 every 4 weeks. This "lifetime maximum dose" may be lower if you have heart disease risk factors such as radiation to the chest, advancing age, and use of other heart-toxic drugs. ... Life expectancy of at least 3 months per the Investigator. Pegylation protects the liposomes from detection by the reticuloendothelial system and increases the plasma half-life compared with conventional doxorubicin [24, 25]. Antineoplastic agent:Acute leukaemias Lymphomas Sarcomas Various solid tumours. abametapirabametapir will increase the level or effect of doxorubicin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Doxorubicin Hydrochloride with NDC 45963-733 is a a human prescription drug product labeled by Actavis Pharma, Inc.. 1 One of the most dose-limiting side effects of anthracycline therapy is the development of a … Data not available. Anthracyclines have become one of the most important drugs for the treatment of both hematological and solid tumors [1–3].Conventional anthracyclines have a relatively low therapeutic index [].The risk of cardiotoxicity increases with higher cumulative doses of anthracyclines [4–7].It is recommended that the cumulative life time dose of doxorubicin … At higher doses, the chances of heart damage increase. The recommended dose of doxorubicin hydrochloride liposome injection is 30 mg/m intravenously over 60 minutes on day 4 of each 21-day cycle for eight cycles or until disease progression or unacceptable toxicity. Acute myeloid leukemia (AML). Introduction. Since 1975, ONS has provided a professional community for oncology nurses, developed evidence-based education … Doxorubicin (DOX) is an effective anthracycline agent used to treat a wide range of malignant tumors. It has widespread use as a chemotherapeutic agent since the 1960s. 2. Animals: Four hundred and … The terminal half-life is 20 hours to 48 hours. The recommended lifetime or cumulative dose for Adriamycin depends on a person’s risk for cardiotoxicity; Lifetime cumulative doses of Adriamycin above 550 mg/m 2 (for 21-day cycles) are associated with an increased risk of cardiomyopathy; In people at high risk of cardiotoxicity, the maximum lifetime cumulative dose of doxorubicin should not exceed 400 … The median administered doxorubicin dose was 450 mg/m2 (interquartile range, 300–750 mg/m2). Doxorubicin is a chemotherapy drug and is a treatment for many different types of cancer. Doxorubicin is a type of chemotherapy drug called an anthracycline. It slows or stops the growth of cancer cells by blocking an enzyme called topo isomerase 2. Cancer cells need this enzyme to divide and grow. Doxorubicin is an anthracycline type of chemotherapy that is used for treating various types of cancer. In high … chromosome tests. The purpose of this study was to determine the risk factors associated with hand-foot syndrome in patients with lymphoma using pegylated liposomal doxorubicin. Elimination. anthracycline cardiotoxicity and the cumulative dose of the drug. Here, we investigated whether … Plasma clearance is ranges from 324 mL/min/m 2 to 809 mL/min/m 2. cyclophosphamide or related anthracycline compounds such as daunorubicin, idarubicin and/or epirubicin, the dosage of doxorubicin should be reduced to 30-60 mg/m 2 every 3 – 4 weeks. DOSAGE AND ADMINISTRATION Important Use Information. Doxorubicin Hydrochloride (doxorubicin hydrochloride) dose ... tip www.pdr.net. INTRODUCTION: Doxorubicin belongs to anthracycline and antitumor antibiotic. caesius (soil fungus), doxorubicin is semi-synthetically produced and is indicated for the The therapy-limitin … Adverse Effects. 3 “Pegylation” is the process whereby the doxorubicin-containing liposomes are enclosed within a PEG layer. Maximum lifetime cumulative dosage of doxorubicin is 550 mg/m2 IV; 450 mg/m2 IV in patients who have received previous mediastinal radiation. Purpose Cumulative anthracycline dose is one of the strongest predictors of heart failure (HF) after cancer treatment. Enhancing doxorubicin anti-tumor efficacy and ameliorating cardiotoxicity with aerobic exercise. Doxorubicin hydrochloride is approved to be used alone or with other drugs to treat: Acute lymphoblastic leukemia (ALL). Doxorubicin, also known as adriamycin, is a member of the anthracycline anticancer drug family (Fig. -----DOSAGE FORMS AND STRENGTHS----- Doxorubicin HCl injection: Vials contain 10 mg/5 mL, 20 mg/10 mL, Maximum recommended cumulative dose (mg/m2) Daunorubicin1 600 Doxorubicin2,3 450 Epirubicin4 900 Idarubicin – IV5 150 Idarubicin – PO6 400 Mitoxantrone7 160 NB Aside from the cumulative anthracycline dose, other risk factors for cardiotoxicity should be taken into account. Clinical guidelines recommend a maximum cumulative lifetime dose of 500 mg/m 2; however, doxorubicin toxicity is variable and has a genetic basis . The terminal half-life is 20 hours to 48 hours. Liposomal doxorubicin formulations include liposomal doxorubicin and pegylated liposomal doxorubicin. The FRETing lifetime was determined by globally fitting the in vitro LSM FLIM data from cells treated with 0, 0.18, 0.9, 1.8, 9, 18 µM doxorubicin for 3 … This “lifetime maximum dose” may be lower if you have heart disease risk factors such as radiation to the chest, advancing age, and use of other heart-toxic drugs. FDA approved for … Discontinue doxorubicin HCl in patients who develop signs or symptoms of cardiomyopathy (2.2). It is important to note that pegylated liposomal doxorubicin should not be substituted for conventional doxorubicin on a milligram per milligram basis, as conventional doxorubicin is administered at doses of 60–90 mg/m 2 every 3 weeks, while the current FDA-recommended dose of pegylated liposomal doxorubicin is 50 mg/m 2 every 4 weeks. † Consider use of the lower doxorubicin dose in the recommended dose range or longer intervals between cycles for heavily pretreated patients, elderly patients, or obese patients. It is used: After surgery to remove the primary tumor in women whose cancer has spread to the lymph nodes under the arm. -The dosage of this drug depends on dosage regimen, general status and previous treatment of the patient.-Lifetime cumulative doses above 550 mg/m2 are associated with an increased risk of cardiomyopathy. It has widespread use as a chemotherapeutic agent since the 1960s. J Control Release. Doxorubicin (Dox) is a widely used anthracycline drug to treat cancer, yet numerous adverse effects influencing different organs may offset the treatment outcome, which in turn affects the patient’s quality of life. Doxorubicin does not cross the blood brain barrier. The risk of developing CHF increases rapidly with increasing total cumulative doses of doxorubicin in excess of 400 mg/m2. These risks, which are based on hematologic toxicity, are currently assumed to be … Oroxylin A (OA) has been identified to exert beneficial effects against inflammatory diseases and cancers. The IC 50 dose for doxorubicin was used for all the experiments. Doxorubicin is clastogenic in mammalian . Purpose . Administer doxorubicin hydrochloride liposome injection after bortezomib on day 4 of each cycle [see Clinical Studies (14.3)]. Binding of doxorubicin and its major metabolite, doxorubicinol, to plasma proteins is 75% and is independent of plasma concentration of doxorubicin up to 1.1 µg/mL. It is used with other drugs. 1).The first anthracycline drug, daunorubicin, was isolated from a soil sample found in Italy in 1960 [[1, 2]].Daunorubicin is a pigmented antibiotic produced by the actinobacterium strain Streptomyces peucetius [[]].Soon, it was discovered … However, the dose of doxorubicin needs to be closely monitored as it can cause life-threatening cardiotoxicity [1–5]. The size of these drug- 2 In clinical practice, the risk factors for pegylated liposomal doxorubicin-related hand-foot syndrome remain unclear. Liposomal doxorubicin formulations include liposomal doxorubicin and pegylated liposomal doxorubicin. Background: Many chemotherapy protocols have been reported for treatment of canine appendicular osteosarcoma (OSA), but outcome comparisons in a single population are lacking. Doxorubicin is part of the anthracycline group of chemotherapeutic agents. If you miss a dose, contact your doctor or pharmacist immediately to establish a new dosing schedule. and . Evid Based Complement Alternat Med. ADRIAMYCIN has been administered as an intra-arterial infusion for 1-3 days at doses of 45-100 mg/m2. Both human and veterinary cancer chemotherapy are undergoing a paradigm shift from a “one size fits all” approach to more personalized, patient-oriented treatment strategies. Cells by blocking an enzyme called topo isomerase 2 a treatment for many different of. 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