Abstract
In the present study, we found that the phosphorylation of p38 mitogen-activated protein kinase (p38) was significantly increased in L-lactate-treated HeLa cells, which is under concentration- and time-dependent manner. The protein level of Bcl-2 was significantly reduced and Bax and C-caspase3 were significantly increased in L-lactate-treated cells. qRT-PCR analysis suggested that the expression level of apoptosis-related genes Bax, C-myc, and FasL were significantly upregulated by L-lactate treatment. In addition, p38 inhibitor SB203580 blocked the L-lactate-stimulated phosphorylation of p38 (p-p38) and apoptosis, which suggested that L-lactate-stimulated apoptosis may be related to the activation of p38. Moreover, TAK1 inhibitor Takinib reduced L-lactate-triggered phosphorylation of p38 and also apoptosis; however, ASK1 inhibitor NQDI-1 did not. Cells transfected with siRNA of TAK1(siTAK1) showed similar results with Takinib inhibitor. These results suggested that the L-lactate treatment elevated activation of p38 and apoptosis was related to TAK1. In this study, we suggested that TAK1 plays an important role in L-lactate-stimulated activation of p38 affecting apoptosis in HeLa cells.
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22 May 2021
A Correction to this paper has been published: https://doi.org/10.1007/s11010-021-04184-4
Abbreviations
- L-Lactate:
-
Sodium L-Lactate
- PCD:
-
The programmed cell death
- MAPK:
-
Mitogen-activated protein kinase
- MAP3Ks:
-
MAP2K kinases
- p38:
-
p38 mitogen-activated protein kinase
- p-p38:
-
phosphorylated p38
- ERK:
-
Extracellular signal-regulated kinases
- JNK/SAPK:
-
c-jun N-terminal or stress-activated protein kinases
- Bcl-2:
-
BCL-2 apoptosis regulator
- Bcl-xl:
-
BCL-2 like 1
- Mcl1:
-
Mcl1 apoptosis regulator
- Bcl-B:
-
BCL-2 like 10
- Bax:
-
BCL-2associated X, apoptosis regulator
- Fas:
-
Fas cell surface death receptor
- FasL:
-
Fas ligand
- ASK1:
-
Apoptosis signal-regulating kinase 1
- TAK1:
-
TGF (transforming growth factor) β-activated kinase 1
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Acknowledgements
This work was supported by the basic and applied basic research project of Guangdong (Youth fund projects, 2019A1515110111); the science and technology development project of Guangdong (2017B090904010); the Shenzhen municipal commission of health and family planning (No. SZFZ2018071); and Chen xiaoping academician workstation of hepatobiliary surgery, Peking University shenzhen hospital, guangdong province.
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QD, ZH, MR, XZ, JL, and TW designed research; QD, ZY, ZL, and LH performed experiments; QD, ZH, LH, JL, and TW analyzed data; QD, ZH, MR, XZ, JL, and TW wrote and revised the manuscript; QD, ZY, ZL, and LH provided the reagents or materials and participated in experimental design.
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Da, Q., Yan, Z., Li, Z. et al. TAK1 is involved in sodium L-lactate-stimulated p38 signaling and promotes apoptosis. Mol Cell Biochem 476, 873–882 (2021). https://doi.org/10.1007/s11010-020-03952-y
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DOI: https://doi.org/10.1007/s11010-020-03952-y