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Oral-recombinant Methioninase Converts an Osteosarcoma from Docetaxel-resistant to -Sensitive in a Clinically-relevant Patient-derived Orthotopic-xenograft (PDOX) Mouse Model
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Oral-recombinant Methioninase Converts an Osteosarcoma from Docetaxel-resistant to -Sensitive in a Clinically-relevant Patient-derived Orthotopic-xenograft (PDOX) Mouse Model
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Oral-recombinant Methioninase Converts an Osteosarcoma from Docetaxel-resistant to -Sensitive in a Clinically-relevant Patient-derived Orthotopic-xenograft (PDOX) Mouse Model
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Journal Article
Oral-recombinant Methioninase Converts an Osteosarcoma from Docetaxel-resistant to -Sensitive in a Clinically-relevant Patient-derived Orthotopic-xenograft (PDOX) Mouse Model
2021
Overview
Osteosarcoma is the most frequent malignant bone tumor. Failure of first-line therapy results in poor prognosis of osteosarcoma. In the present report, we examined the efficacy of the combination of oral recombinant methioninase (o-rMETase) and docetaxel (DOC) on an osteosarcoma patient-derived orthotopic xenograft (PDOX) mouse model.
Osteosarcoma-PDOX models were established by tumor insertion within the tibia of nude mice. The osteosarcoma PDOX models were randomized into four groups (4-5 mice per group): control; o-rMETae alone; DOC alone; o- rMETase combined with DOC. The treatment period was 3 weeks.
The combination of o-rMETase and DOC showed significant efficacy compared to the control group (p=0.03). In contrast, there was no significant efficacy of o-rMETase alone or DOC alone (p=0.65, 0.60, respectively).
o-rMETase converted an osteosarcoma PDOX from DOC-resistant to -sensitive. This combination therapy may be effective against recalcitrant osteosarcoma and other recalcitrant cancers.
Publisher
Anticancer Research USA Inc
Subject
/ Animals
/ Antineoplastic Agents - pharmacology
/ Antineoplastic Combined Chemotherapy Protocols
/ Antineoplastic Combined Chemotherapy Protocols - pharmacology
/ Bone Neoplasms - drug therapy
/ Carbon-Sulfur Lyases - administration & dosage
/ Drug Resistance, Neoplasm - drug effects
/ Humans
/ Male
/ Mice
/ Recombinant Proteins - administration & dosage
/ Tibia
