A Micellar Mitotane Formulation with High Drug-Loading and Solubility: Physico-Chemical Characterization and Cytotoxicity Studies in 2D and 3D In Vitro Tumor Models
Please always quote using this URN: urn:nbn:de:bvb:20-opus-206224
- Adrenocortical carcinoma (ACC) is a rare tumor and prognosis is overall poor but heterogeneous. Mitotane (MT) has been used for treatment of ACC for decades, either alone or in combination with cytotoxic chemotherapy. Even at doses up to 6 g per day, more than half of the patients do not achieve targeted plasma concentration (14–20 mg L\(^{-1}\)) even after many months of treatment due to low water solubility, bioavailability, and unfavorable pharmacokinetic profile. Here a novel MT nanoformulation with very high MT concentrations inAdrenocortical carcinoma (ACC) is a rare tumor and prognosis is overall poor but heterogeneous. Mitotane (MT) has been used for treatment of ACC for decades, either alone or in combination with cytotoxic chemotherapy. Even at doses up to 6 g per day, more than half of the patients do not achieve targeted plasma concentration (14–20 mg L\(^{-1}\)) even after many months of treatment due to low water solubility, bioavailability, and unfavorable pharmacokinetic profile. Here a novel MT nanoformulation with very high MT concentrations in physiological aqueous media is reported. The MT‐loaded nanoformulations are characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and powder X‐ray diffraction which confirms the amorphous nature of the drug. The polymer itself does not show any cytotoxicity in adrenal and liver cell lines. By using the ACC model cell line NCI‐H295 both in monolayers and tumor cell spheroids, micellar MT is demonstrated to exhibit comparable efficacy to its ethanol solution. It is postulated that this formulation will be suitable for i.v. application and rapid attainment of therapeutic plasma concentrations. In conclusion, the micellar formulation is considered a promising tool to alleviate major drawbacks of current MT treatment while retaining bioactivity toward ACC in vitro.…
Author: | Malik Salman Haider, Jochen Schreiner, Sabine Kendl, Matthias Kroiss, Robert Luxenhofer |
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URN: | urn:nbn:de:bvb:20-opus-206224 |
Document Type: | Journal article |
Faculties: | Medizinische Fakultät / Medizinische Klinik und Poliklinik I |
Fakultät für Chemie und Pharmazie / Institut für Funktionsmaterialien und Biofabrikation | |
Language: | English |
Parent Title (English): | Macromolecular Bioscience |
Year of Completion: | 2019 |
Volume: | 20 |
Issue: | 1 |
Pagenumber: | 1900178 |
Source: | Macromolecular Bioscience 2020, 20(1), 1900178. DOI: 10.1002/mabi.201900178 |
DOI: | https://doi.org/10.1002/mabi.201900178 |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Tag: | NCI-H295R; adrenocortical carcinoma; amphiphilic block copolymer; poly(2-oxazoline); solubility enhancement |
Release Date: | 2020/09/21 |
Licence (German): | CC BY-NC-ND: Creative-Commons-Lizenz: Namensnennung, Nicht kommerziell, Keine Bearbeitungen 4.0 International |