Kriel 2018 Sci Rep

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Kriel J, Mueller-Nedebock K, Maarman G, Mbizana S, Ojuka E, Klumperman B, Loos B (2018) Coordinated autophagy modulation overcomes glioblastoma chemoresistance through disruption of mitochondrial bioenergetics. Sci Rep 8:10348.

» PMID: 29985441 Open Access »O2k-brief

Kriel J, Mueller-Nedebock K, Maarman G, Mbizana S, Ojuka E, Klumperman B, Loos B (2018) Sci Rep

Abstract: Glioblastoma Multiforme (GBM) is known to be one of the most malignant and aggressive forms of brain cancer due to its resistance to chemotherapy. Recently, GBM was found to not only utilise both oxidative phosphorylation (OXPHOS) and aerobic glycolysis, but also depend on the bulk protein degradation system known as macroautophagy to uphold proliferation. Although autophagy modulators hold great potential as adjuvants to chemotherapy, the degree of upregulation or inhibition necessary to achieve cell death sensitisation remains unknown. Therefore, this study aimed to determine the degree of autophagy modulation necessary to impair mitochondrial bioenergetics to the extent of promoting cell death onset. It was shown that coordinated upregulation of autophagy followed by its inhibition prior to chemotherapy decreased electron transfer capacity (ET-capacity) and OXPHOS-capacity, impaired mitochondrial fission and fusion dynamics and enhanced apoptotic cell death onset in terms of cleaved caspase 3 and cleaved PARP expression. Therefore, coordinated autophagy modulation may present a favourable avenue for improved chemotherapeutic intervention in the future.

Terminology and abbreviations edited according to MitoEAGLE recommendations (Gnaiger E).


Bioblast editor: Plangger M, Kandolf G O2k-Network Lab: ZA Cape Town Smith J, ZA Cape Town Ojuka EO


Labels: MiParea: Respiration, mt-Structure;fission;fusion  Pathology: Cancer 

Organism: Human  Tissue;cell: Nervous system, Other cell lines  Preparation: Permeabilized cells 


Coupling state: LEAK, ROUTINE, OXPHOS, ET  Pathway: N, ROX  HRR: Oxygraph-2k 

Labels, 2018-08 


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