# HDAC6 inhibitor ACY-738 induces apoptosis and autophagy in diffuse large B-cell lymphoma cells through P53 acetylation

**Authors:** 佩洁 蒋, 金宜 刘, 官翠 杨, 佳润 李, 小龙 田, 世杰 杨, 锦 魏, 曦 张

PMC · DOI: 10.3760/cma.j.cn121090-20240826-00324 · Chinese Journal of Hematology · 2025-05-01

## TL;DR

This study shows that the HDAC6 inhibitor ACY-738 can kill diffuse large B-cell lymphoma cells by inducing cell death and autophagy through P53 acetylation.

## Contribution

The novel finding is that ACY-738 induces apoptosis and autophagy in DLBCL cells via P53 acetylation, offering a new therapeutic strategy.

## Key findings

- HDAC6 is highly expressed in DLBCL, and ACY-738 inhibits cell proliferation and DNA synthesis in a dose-dependent manner.
- ACY-738 increases ROS levels, induces mitochondrial damage, and promotes apoptosis and autophagy in DLBCL cells.
- ACY-738 upregulates acetylated P53 and modulates key apoptotic and autophagy-related proteins.

## Abstract

初步探讨组蛋白去乙酰化酶6（HDAC6）抑制剂ACY-738在弥漫大B细胞淋巴瘤（DLBCL）中的抗肿瘤作用及其机制。

生信分析HDAC6在不同肿瘤及DLBCL中的表达。不同浓度ACY-738处理DLBCL细胞后，CCK-8检测细胞活力；EdU检测细胞DNA合成能力；软琼脂实验检测细胞克隆形成；荧光显微镜检测细胞内活性氧（ROS）的水平；透射电镜观察细胞形态的变化；流式细胞术检测线粒体ROS和细胞凋亡水平；蛋白质印迹法（Western blotting）检测细胞凋亡相关蛋白及自噬相关蛋白的表达水平。

HDAC6在DLBCL中高表达（P<0.05）。ACY-738抑制DLBCL细胞增殖、DNA合成及克隆形成，且呈剂量依赖性（P<0.05）。ACY-738处理后DLBCL细胞内ROS水平及线粒体ROS水平增加，且呈剂量依赖性（P<0.05）。电镜观察细胞形态，发现ACY-738处理后，细胞线粒体肿胀破裂，线粒体嵴减少或消失，出现自噬溶酶体，并观察到细胞凋亡形态；Western blotting结果显示ACY-738处理后，凋亡相关蛋白BCL-2表达下调，Cleaved-PARP、Cleaved caspase-3、BAX表达上调（P<0.05），自噬相关蛋白Atg7、Atg3、LC3B、P62表达下调，乙酰化P53蛋白表达上调（P<0.05）。

HDAC6抑制剂ACY-738通过乙酰化P53诱导线粒体依赖性细胞凋亡和自噬，从而抑制DLBCL细胞生长。

## Linked entities

- **Genes:** HDAC6 (histone deacetylase 6) [NCBI Gene 10013], TP53 (tumor protein p53) [NCBI Gene 7157], BCL2 (BCL2 apoptosis regulator) [NCBI Gene 596], BAX (BCL2 associated X, apoptosis regulator) [NCBI Gene 581], ATG7 (autophagy related 7) [NCBI Gene 10533], ATG3 (autophagy related 3) [NCBI Gene 64422], MAP1LC3B (microtubule associated protein 1 light chain 3 beta) [NCBI Gene 81631], GTF2H1 (general transcription factor IIH subunit 1) [NCBI Gene 2965]
- **Chemicals:** ACY-738 (PubChem CID 57381425)
- **Diseases:** diffuse large B-cell lymphoma (MONDO:0018905), DLBCL (MONDO:0018905)

## Full-text entities

- **Genes:** ATG7 (autophagy related 7) [NCBI Gene 10533] {aka APG7-LIKE, APG7L, GSA7, SCAR31}, ATG3 (autophagy related 3) [NCBI Gene 64422] {aka APG3, APG3-LIKE, APG3L, PC3-96, hApg3}, COL11A2 (collagen type XI alpha 2 chain) [NCBI Gene 1302] {aka DFNA13, DFNB53, FBCG2, HKE5, OSMEDA, OSMEDB}, MAP1LC3B (microtubule associated protein 1 light chain 3 beta) [NCBI Gene 81631] {aka ATG8F, LC3B, MAP1A/1BLC3, MAP1LC3B-a}, BAX (BCL2 associated X, apoptosis regulator) [NCBI Gene 581] {aka BCL2L4}, NUP62 (nucleoporin 62) [NCBI Gene 23636] {aka IBSN, SNDI, p62}, HDAC6 (histone deacetylase 6) [NCBI Gene 10013] {aka CPBHM, HD6, JM21, KDAC6, PPP1R90}, BCL2 (BCL2 apoptosis regulator) [NCBI Gene 596] {aka Bcl-2, PPP1R50}, CASP3 (caspase 3) [NCBI Gene 836] {aka CPP32, CPP32B, SCA-1}, TP53 (tumor protein p53) [NCBI Gene 7157] {aka BCC7, BMFS5, LFS1, P53, TRP53}
- **Diseases:** DLBCL (MESH:D016403), tumor (MESH:D009369)
- **Chemicals:** ROS (MESH:D017382), ACY-738 (MESH:C583720), EdU (MESH:C022811)

## Full text

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## Figures

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## References

25 references — full list in the complete paper: https://tomesphere.com/paper/PMC12268292/full.md

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Source: https://tomesphere.com/paper/PMC12268292