2022
Reduced ER–mitochondria connectivity promotes neuroblastoma multidrug resistance
COKU, Jorida, David M BOOTH, Jan ŠKODA, Madison C PEDROTTY, Jennifer VOGEL et. al.Základní údaje
Originální název
Reduced ER–mitochondria connectivity promotes neuroblastoma multidrug resistance
Autoři
COKU, Jorida, David M BOOTH, Jan ŠKODA (203 Česká republika, domácí), Madison C PEDROTTY, Jennifer VOGEL, Kangning LIU, Annette VU, Erica L CARPENTER, Jamie C YE, Michelle A CHEN, Peter DUNBAR, Elizabeth SCADDEN, Taekyung D YUN, Eiko NAKAMARU-OGISO, Estela AREA-GOMEZ, Yimei LI, Kelly C GOLDSMITH, C Patrick REYNOLDS, Gyorgy HAJNOCZKY a Michael D HOGARTY (garant)
Vydání
EMBO Journal, Hoboken, Wiley, 2022, 0261-4189
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
30204 Oncology
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 11.400
Kód RIV
RIV/00216224:14310/22:00125550
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000760798100001
Klíčová slova anglicky
ceramides; inter-organelle contacts; mitochondria-associated membranes; multidrug resistance; sphingolipids
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 3. 6. 2022 13:45, Mgr. Marie Šípková, DiS.
Anotace
V originále
Most cancer deaths result from progression of therapy resistant disease, yet our understanding of this phenotype is limited. Cancer therapies generate stress signals that act upon mitochondria to initiate apoptosis. Mitochondria isolated from neuroblastoma cells were exposed to tBid or Bim, death effectors activated by therapeutic stress. Multidrug-resistant tumor cells obtained from children at relapse had markedly attenuated Bak and Bax oligomerization and cytochrome c release (surrogates for apoptotic commitment) in comparison with patient-matched tumor cells obtained at diagnosis. Electron microscopy identified reduced ER-mitochondria-associated membranes (MAMs; ER-mitochondria contacts, ERMCs) in therapy-resistant cells, and genetically or biochemically reducing MAMs in therapy-sensitive tumors phenocopied resistance. MAMs serve as platforms to transfer Ca2+ and bioactive lipids to mitochondria. Reduced Ca2+ transfer was found in some but not all resistant cells, and inhibiting transfer did not attenuate apoptotic signaling. In contrast, reduced ceramide synthesis and transfer was common to resistant cells and its inhibition induced stress resistance. We identify ER-mitochondria-associated membranes as physiologic regulators of apoptosis via ceramide transfer and uncover a previously unrecognized mechanism for cancer multidrug resistance.
Návaznosti
GJ20-00987Y, projekt VaV |
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