Doxorubicin and cyclophosphamide for the treatment of canine lymphoma: a randomized, placebo-controlled study.
Median survival times (STs) for doxorubicin-treated canine lymphoma range from 5.7 to 9 months. Because dogs treated with multi-agent protocols have longer STs, we sought to evaluate whether adding cyclophosphamide would improve outcome in canine lymphoma patients while maintaining an acceptable level of toxicity. Thirty-two dogs with stage III-V multicentric lymphoma were treated with doxorubicin every 3 weeks for five total cycles and prednisone at a tapering dose for the first 4 weeks. Dogs were randomized to receive either cyclophosphamide or placebo concurrently. Seventeen dogs received doxorubicin and placebo, while 15 dogs received doxorubicin and cyclophosphamide. Response, toxicity, progression-free interval (PFI) and ST were evaluated. The combination of doxorubicin and cyclophosphamide was well tolerated, causing no increase in adverse events over doxorubicin alone. Despite a numeric improvement in outcome in cyclophosphamide treated dogs, the addition of cyclophosphamide did not result in statistically improved response rate, PFI or ST.
Lori
J C
JC
Animal Cancer Center, Colorado State University College of Veterinary Medicine, Fort Collins, CO 80523-1620, USA.
Stein
T J
TJ
Thamm
D H
DH
D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage / Q000009:adverse effects; D018906:Antineoplastic Agents, Alkylating / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D018931:Antineoplastic Agents, Hormonal / Q000008:administration & dosage / Q000009:adverse effects; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000009:adverse effects / Q000627:therapeutic use*; D003520:Cyclophosphamide / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D018572:Disease-Free Survival; D004283:Dog Diseases / Q000188:drug therapy*; D004285:Dogs; D004317:Doxorubicin / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D008223:Lymphoma / Q000188:drug therapy / Q000662:veterinary*; D008297:Male; D009367:Neoplasm Staging; D010919:Placebos; D011241:Prednisone / Q000008:administration & dosage / Q000009:adverse effects; D011379:Prognosis; D012582:Schools, Veterinary; D016019:Survival Analysis; D016896:Treatment Outcome
D000903:Antibiotics, Antineoplastic; D018906:Antineoplastic Agents, Alkylating; D018931:Antineoplastic Agents, Hormonal; D010919:Placebos; D004317:Doxorubicin; D003520:Cyclophosphamide; D011241:Prednisone