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Tumor response of temozolomide in combination with morphine in a xenograft model of human glioblastoma
- Source :
- Oncotarget
- Publication Year :
- 2017
- Publisher :
- Impact Journals, LLC, 2017.
-
Abstract
- // Anna Lisa Iorio 1 , Martina da Ros 1 , Lorenzo Genitori 1 , Maurizio Lucchesi 1 , Fabiana Colelli 2 , Giacomo Signorino 2 , Francesco Cardile 2 , Giacomo Laffi 3 , Maurizio de Martino 1 , Claudio Pisano 2 and Iacopo Sardi 1 1 Neuro-Oncology Unit, Department of Pediatric Oncology, Meyer Children’s Hospital, Florence, Italy 2 BIOGEM Research Institute, Ariano Irpino, Italy 3 Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy Correspondence to: Iacopo Sardi, email: iacopo.sardi@meyer.it Keywords: temozolomide, glioblastoma, morphine, blood-brain barrier, animal model Received: November 15, 2016 Accepted: July 13, 2017 Published: August 03, 2017 ABSTRACT Despite multimodal treatments comprising, radiation therapy (RT) and chemotherapy with temozolomide (TMZ), the prognosis of glioblastoma multiforme (GBM) remains dismal and consolidated therapy yields a median survival of 14.6 months. Blood Brain Barrier (BBB) mediated chemoresistance and high dose related toxicity make necessary the development of new therapeutic approach to sensitize GBM to TMZ. The aim of the present study was to investigate the potential of the treatment morphine plus TMZ metronmic doses (1,77 and 0,9 mg/kg) in GBM therapy. The effect of morphine, on tumor cell growth and P-glycoprothein (P-gp) activity, was investigate in in vitro models. The results demonstrated that GBM cells growth is not influenced by morphine treatment and, for the first time, we show that morphine is an inhibitor of the activity of P-gp efflux transporter who is markedly expressed on BBB. In vivo , response to the treatments TMZ plus morphine was investigated in an orthotopic nude mice model of GBM. Animals treated with TMZ metronomic doses showed a significant tumor growth inhibition compared to untreated mice and association with morphine appears to improve TMZ efficacy. Moreover, the combination of morphine with lower dose of TMZ result in a cytostatic effect on tumor growth over the period of the pharmacological treatments. In conclusion this novel approach could be a successful strategy to overcome chemoresistance and side effects TMZ mediated, reducing drug dosage and improving long term response, in GBM therapy.
- Subjects :
- 0301 basic medicine
Oncology
medicine.medical_specialty
medicine.medical_treatment
Animal model
Blood-brain barrier
Glioblastoma
Morphine
Temozolomide
temozolomide
Pharmacology
Blood–brain barrier
03 medical and health sciences
0302 clinical medicine
In vivo
Internal medicine
medicine
Chemotherapy
business.industry
animal model
glioblastoma
morphine
blood-brain barrier
medicine.disease
Radiation therapy
030104 developmental biology
medicine.anatomical_structure
030220 oncology & carcinogenesis
Toxicity
business
Research Paper
medicine.drug
Subjects
Details
- ISSN :
- 19492553
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Oncotarget
- Accession number :
- edsair.doi.dedup.....7a2b26eceaa55dd834859a7a65096a0f