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Vulnerability of invasive glioblastoma cells to lysosomal membrane destabilization.

Le Joncour, Vadim (author)
Filppu, Pauliina (author)
Hyvönen, Maija (author)
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Holopainen, Minna (author)
Turunen, S Pauliina (author)
Karolinska Institutet
Sihto, Harri (author)
Burghardt, Isabel (author)
Joensuu, Heikki (author)
Tynninen, Olli (author)
Jääskeläinen, Juha (author)
Weller, Michael (author)
Lehti, Kaisa (author)
Karolinska Institutet
Käkelä, Reijo (author)
Laakkonen, Pirjo (author)
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 (creator_code:org_t)
2019-05-08
2019
English.
In: EMBO Molecular Medicine. - : EMBO. - 1757-4676 .- 1757-4684. ; 11:6
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The current clinical care of glioblastomas leaves behind invasive, radio- and chemo-resistant cells. We recently identified mammary-derived growth inhibitor (MDGI/FABP3) as a biomarker for invasive gliomas. Here, we demonstrate a novel function for MDGI in the maintenance of lysosomal membrane integrity, thus rendering invasive glioma cells unexpectedly vulnerable to lysosomal membrane destabilization. MDGI silencing impaired trafficking of polyunsaturated fatty acids into cells resulting in significant alterations in the lipid composition of lysosomal membranes, and subsequent death of the patient-derived glioma cells via lysosomal membrane permeabilization (LMP). In a preclinical model, treatment of glioma-bearing mice with an antihistaminergic LMP-inducing drug efficiently eradicated invasive glioma cells and secondary tumours within the brain. This unexpected fragility of the aggressive infiltrating cells to LMP provides new opportunities for clinical interventions, such as re-positioning of an established antihistamine drug, to eradicate the inoperable, invasive, and chemo-resistant glioma cells from sustaining disease progression and recurrence.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Cancer and Oncology (hsv//eng)

Keyword

LMP
MDGI
PUFA
antihistamine
glioma

Publication and Content Type

ref (subject category)
art (subject category)

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