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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2017 ; 7
(1
): 5040
Nephropedia Template TP
gab.com Text
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English Wikipedia
The energy disruptor metformin targets mitochondrial integrity via modification
of calcium flux in cancer cells
#MMPMID28698627
Loubiere C
; Clavel S
; Gilleron J
; Harisseh R
; Fauconnier J
; Ben-Sahra I
; Kaminski L
; Laurent K
; Herkenne S
; Lacas-Gervais S
; Ambrosetti D
; Alcor D
; Rocchi S
; Cormont M
; Michiels JF
; Mari B
; Mazure NM
; Scorrano L
; Lacampagne A
; Gharib A
; Tanti JF
; Bost F
Sci Rep
2017[Jul]; 7
(1
): 5040
PMID28698627
show ga
Mitochondrial integrity is critical for the regulation of cellular energy and
apoptosis. Metformin is an energy disruptor targeting complex I of the
respiratory chain. We demonstrate that metformin induces endoplasmic reticulum
(ER) stress, calcium release from the ER and subsequent uptake of calcium into
the mitochondria, thus leading to mitochondrial swelling. Metformin triggers the
disorganization of the cristae and inner mitochondrial membrane in several cancer
cells and tumors. Mechanistically, these alterations were found to be due to
calcium entry into the mitochondria, because the swelling induced by metformin
was reversed by the inhibition of mitochondrial calcium uniporter (MCU). We also
demonstrated that metformin inhibits the opening of mPTP and induces
mitochondrial biogenesis. Altogether, the inhibition of mPTP and the increase in
mitochondrial biogenesis may account for the poor pro-apoptotic effect of
metformin in cancer cells.