Abstract
Oxidative stress impairs functional recovery after intracerebral hemorrhage (ICH). Histone deacetylase 6 (HDAC6) plays an important role in the initiation of oxidative stress. However, the function of HDAC6 in ICH and the underlying mechanism of action remain elusive. We demonstrated here that HDAC6 knockout mice were resistant to oxidative stress following ICH, as assessed by the MDA and NADPH/NADP+ assays and ROS detection. HDAC6 deficiency also resulted in reduced neuronal apoptosis and lower expression levels of apoptosis-related proteins. Further mechanistic studies showed that HDAC6 bound to malate dehydrogenase 1 (MDH1) and mediated-MDH1 deacetylation on the lysine residues at position 121 and 298. MDH1 acetylation was inhibited in HT22 cells that were challenged with ICH-related damaging agents (Hemin, Hemoglobin, and Thrombin), but increased when HDAC6 was inhibited, suggesting an interplay between HDAC6 and MDH1. The acetylation-mimetic mutant, but not the acetylation-resistant mutant, of MDH1 protected neurons from oxidative injury. Furthermore, HDAC6 inhibition failed to alleviate brain damage after ICH when MDH1 was knockdown. Taken together, our study showed that HDAC6 inhibition protects against brain damage during ICH through MDH1 acetylation.
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Data availability
The datasets used and/or analyzed during the present study are available from the corresponding author upon reasonable request.
Abbreviations
- Bax:
-
Bcl-2-associated X protein
- Caspase-3:
-
Cysteiny aspartate specific proteinase-3
- Co-IP:
-
Co-immunoprecipitation
- IP:
-
Immunoprecipitation
- DMSO:
-
Dimethyl sulfoxide
- GAPDH:
-
Glyceraldehyde 3-phosphate dehydrogenase
- HDACs:
-
Histone deacetylases
- HDAC6:
-
Histone deacetylases 6
- ICH:
-
Intracerebral hemorrhage
- MDH1:
-
Malate dehydrogenase 1
- MDA:
-
Malondialdehyde
- mNSS:
-
Modified neurological severity score
- NAD:
-
Nicotinamide adenine Dinucleotide
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate
- ROS:
-
Reactive oxygen species
- siRNA:
-
Small interfering RNA
- TubA:
-
Tubastatin A
- TUNEL:
-
Terminal deoxynucleotidyl transferase dUTP nick end labeling
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Acknowledgements
We are grateful to the members of Dr Cui’s laboratory for their kind suggestions.
Funding
This work was supported by grants from National Natural Science Foundation of China (81571210, 81771282, and 82171305) and Xuzhou Innovation Capacity Building Program (KC19239) to Dr. Guiyun Cui, by grants from the National Natural Science Foundation of China (81971134), the Natural Science Foundation of Jiangsu Province (BK20191152), Medical Scientific Research Project of Jiangsu Provincial Health Commission (ZDB2020017), and Xuzhou Key Research and Development Program (KC19131) to Dr. **nchun Ye, by grants from the National Natural Science Foundation of China (82001276) to Dr. Hu, and by grants from Development Fund of Affiliated Hospital of Xuzhou Medical University (XYFM2020033) to Miao Wang.
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GYC and MW: contributed to research design and manuscript writing. MW: executed most experiments. CZ: contributed to data acquirement and analyzation. LY: assisted experiments accomplishment. WJM and BCL: helped with most of the mouse experiments. YW: assisted protein immunoprecipitation. WFW and MYZ: assisted protein extraction and animal experiments. All authors read and approved the final manuscript.
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All animal experiments carried out were approved by the Jiangsu Provincial Animal Care, and all mice procedures were approved by the institutional Animal Use and Care Committee of XuZhou Medical University.
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Wang, M., Zhou, C., Yu, L. et al. Upregulation of MDH1 acetylation by HDAC6 inhibition protects against oxidative stress-derived neuronal apoptosis following intracerebral hemorrhage. Cell. Mol. Life Sci. 79, 356 (2022). https://doi.org/10.1007/s00018-022-04341-y
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DOI: https://doi.org/10.1007/s00018-022-04341-y