Tumour cell kinetics as predictors of response in canine lymphoma treated with chemotherapy alone or combined with whole body hyperthermia

Autor:	Susan M. LaRue, Edward L. Gillette, Gregory K. Ogilvie, Donald E. Thrall, Mark W. Dewhirst, Michael H. Fox, Rodney L. Page, D M Getzy, Jeffrey L. Johnson
Rok vydání:	1999
Předmět:	Hyperthermia Cancer Research medicine.medical_specialty Indazoles Lymphoma Physiology medicine.medical_treatment Urology chemistry.chemical_compound Dogs Physiology (medical) Antineoplastic Combined Chemotherapy Protocols medicine Animals Doubling time Doxorubicin Dog Diseases Chemotherapy Canine Lymphoma business.industry Cell Cycle Lonidamine Hyperthermia Induced Prognosis medicine.disease Combined Modality Therapy Surgery Non-Hodgkin's lymphoma chemistry business medicine.drug
Zdroj:	International Journal of Hyperthermia. 15:475-486
ISSN:	1464-5157 0265-6736
Popis:	Kinetic parameters including potential doubling time (Tpot), duration of S phase (Ts), labelling index (LI), and DNA index (DI) were obtained from 42 dogs with previously untreated lymphoma. Standard flow cytometric techniques using BrdUrd were employed. All dogs were treated with L-asparaginase and remission was induced in 26 dogs, which were then randomized to receive chemotherapy only (doxorubicin [DOX] alone or with lonidamine) or chemotherapy plus whole body hyperthermia (WBH). Dogs were treated every 3 weeks for up to five treatments and evaluated every 3 weeks for evidence of tumour recurrence. Within this subset of animals there was no difference in outcome based on treatment group. Median values for Tpot, Ts and LI were 3.4 days, 7.23 h and 12.49%, respectively. Dogs that had tumours with LI > or = 20% had a shorter time until recurrence than dogs with tumours characterized by LI < 20%. In dogs treated only with chemotherapy, dogs bearing tumours with longer than median Tpot and Ts values and lower than median LI had significantly longer remission duration than dogs with more rapidly proliferating tumours. Dogs treated only with chemotherapy, which had longer than median Tpot and Ts values and lower than median LI, had significantly longer remission duration than all other dogs in the study. The mechanisms in which kinetics are associated with response to chemotherapy are not clear and vary depending on tumour type and treatment regimen. More work is needed to understand factors involved in cell killing during in vivo hyperthermia.
Databáze:	OpenAIRE
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