Bischof, H.* ; Maier, S.* ; Koprowski, P.* ; Kulawiak, B.* ; Burgstaller, S.* ; Jasińska, J.* ; Serafimov, K.* ; Zochowska, M.* ; Gross, D.* ; Schroth, W.* ; Matt, L.* ; Juarez Lopez, D.A.* ; Zhang, Y.* ; Bonzheim, I.* ; Büttner, F.A.* ; Fend, F.* ; Schwab, M.* ; Birkenfeld, A.L. ; Malli, R.* ; Lämmerhofer, M.* ; Bednarczyk, P.* ; Szewczyk, A.* ; Lukowski, R.*
mitoBKCa is functionally expressed in murine and human breast cancer cells and potentially contributes to metabolic reprogramming.
eLife 12:31 (2024)
Alterations in the function of K+ channels such as the voltage- and Ca2+-activated K+ channel of large conductance (BKCa) reportedly promote breast cancer (BC) development and progression. Underlying molecular mechanisms remain, however, elusive. Here, we provide electrophysiological evidence for a BKCa splice variant localized to the inner mitochondrial membrane of murine and human BC cells (mitoBKCa). Through a combination of genetic knockdown and knockout along with a cell permeable BKCa channel blocker, we show that mitoBKCa modulates overall cellular and mitochondrial energy production, and mediates the metabolic rewiring referred to as the 'Warburg effect', thereby promoting BC cell proliferation in the presence and absence of oxygen. Additionally, we detect mitoBKCa and BKCa transcripts in low or high abundance, respectively, in clinical BC specimens. Together, our results emphasize, that targeting mitoBKCa could represent a treatment strategy for selected BC patients in future.
Impact Factor
Scopus SNIP
Web of Science
Times Cited
Scopus
Cited By
Altmetric
Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
Schlagwörter
K+ Channels ; Kcnma1 ; Slo1 ; Warburg Effect ; Biosensors ; Breast Cancer ; Cancer Biology ; Cell Biology ; Human ; Metabolic Reprogramming ; Mitobkca ; Mouse; Ca2+-activated K+ Channels; Inner Mitochondrial-membrane; Potassium Channel; Bk Channels; Calcium; Ca2+; Activation; Indicators
Keywords plus
Sprache
englisch
Veröffentlichungsjahr
2024
Prepublished im Jahr
0
HGF-Berichtsjahr
2024
ISSN (print) / ISBN
2050-084X
e-ISSN
2050-084X
ISBN
Bandtitel
Konferenztitel
Konferzenzdatum
Konferenzort
Konferenzband
Quellenangaben
Band: 12,
Heft: ,
Seiten: ,
Artikelnummer: 31
Supplement: ,
Reihe
Verlag
eLife Sciences Publications
Verlagsort
Sheraton House, Castle Park, Cambridge, Cb3 0ax, England
Tag d. mündl. Prüfung
0000-00-00
Betreuer
Gutachter
Prüfer
Topic
Hochschule
Hochschulort
Fakultät
Veröffentlichungsdatum
0000-00-00
Anmeldedatum
0000-00-00
Anmelder/Inhaber
weitere Inhaber
Anmeldeland
Priorität
Begutachtungsstatus
Peer reviewed
POF Topic(s)
90000 - German Center for Diabetes Research
Forschungsfeld(er)
Helmholtz Diabetes Center
PSP-Element(e)
G-502400-001
Förderungen
Robert Bosch Stiftung
Interfaculty Centre for Pharmacogenomics and Pharma Research
Austrian Science Fund
Fritz Thyssen Stiftung
Narodowe Centrum Nauki
Deutsche Forschungsgemeinschaft Germany's Excellence Strategy
Deutsche Forschungsgemeinschaft
Copyright
Erfassungsdatum
2024-07-16