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2018 ; 9
(3
): 334
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Emerging molecular mechanisms in chemotherapy: Ca(2+) signaling at the
mitochondria-associated endoplasmic reticulum membranes
#MMPMID29491433
Kerkhofs M
; Bittremieux M
; Morciano G
; Giorgi C
; Pinton P
; Parys JB
; Bultynck G
Cell Death Dis
2018[Feb]; 9
(3
): 334
PMID29491433
show ga
Inter-organellar communication often takes the form of Ca(2+) signals. These
Ca(2+) signals originate from the endoplasmic reticulum (ER) and regulate
different cellular processes like metabolism, fertilization, migration, and cell
fate. A prime target for Ca(2+) signals are the mitochondria. ER-mitochondrial
Ca(2+) transfer is possible through the existence of mitochondria-associated ER
membranes (MAMs), ER structures that are in the proximity of the mitochondria.
This creates a micro-domain in which the Ca(2+) concentrations are manifold
higher than in the cytosol, allowing for rapid mitochondrial Ca(2+) uptake. In
the mitochondria, the Ca(2+) signal is decoded differentially depending on its
spatiotemporal characteristics. While Ca(2+) oscillations stimulate metabolism
and constitute pro-survival signaling, mitochondrial Ca(2+) overload results in
apoptosis. Many chemotherapeutics depend on efficient ER-mitochondrial Ca(2+)
signaling to exert their function. However, several oncogenes and tumor
suppressors present in the MAMs can alter Ca(2+) signaling in cancer cells,
rendering chemotherapeutics ineffective. In this review, we will discuss recent
studies that connect ER-mitochondrial Ca(2+) transfer, tumor suppressors and
oncogenes at the MAMs, and chemotherapy.
|*Calcium Signaling
[MESH]
|Animals
[MESH]
|Antineoplastic Agents/*metabolism/therapeutic use
[MESH]