In vitro and numerical support for combinatorial irreversible electroporation and electrochemotherapy glioma treatment.
Ann Biomed Eng
; 42(3): 475-87, 2014 Mar.
Article
en En
| MEDLINE
| ID: mdl-24165928
Irreversible electroporation (IRE) achieves targeted volume non-thermal focal ablation using a series of brief electric pulses to kill cells by disrupting membrane integrity. Electrochemotherapy (ECT) uses lower numbers of sub-lethal electric pulses to disrupt membranes for improved drug uptake. Malignant glioma (MG) brain tumors are difficult to treat due to diffuse peripheral margins into healthy neural tissue. Here, in vitro experimental data and numerical simulations investigate the feasibility for IRE-relevant pulse protocols with adjuvant ECT drugs to enhance MG treatment. Cytotoxicity curves were produced on two glioma cell lines in vitro at multiple pulse strengths and drug doses with Bleomycin or Carboplatin. Pulses alone increased cytotoxicity with higher pulse numbers and strengths, reaching >90% by 800 V/cm with 90 pulses. Chemotherapeutic addition increased cytotoxicity by >50% for 1 ng/mL concentrations of either drug relative to 80 pulses alone with J3T cells at electric fields ≥400 V/cm. In addition to necrosis, transmission electron microscopy visualizes apoptotic morphological changes and Hoescht 33342 staining shows apoptotic cell fractions varying with electric field and drug dose relative to controls. Numerically simulated treatment volumes in a canine brain show IRE combined with ECT expands therapeutic volume by 2.1-3.2 times compared to IRE alone.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Bleomicina
/
Neoplasias Encefálicas
/
Carboplatino
/
Electroquimioterapia
/
Glioma
/
Antibióticos Antineoplásicos
/
Modelos Biológicos
Tipo de estudio:
Guideline
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Ann Biomed Eng
Año:
2014
Tipo del documento:
Article
Pais de publicación:
Estados Unidos