| HDAC | HDAC expression | References |
| HDAC1 | Reduced expression from normal to DCIS (ER- tumors) | [28] | | Correlation with ER expression | [29] | | High level of mRNA in ER+ breast cancers | [30] |
| HDAC2 | Locus deletion in ER+ PR+ breast cancers | [31] | | Underexpressed in ER+ breast cancers | [32–55]* |
| HDAC3 | Overexpressed in ER+ breast cancers | [44]* | | Correlation with ER expression | [29] | | Underexpressed in ER+ breast cancer | [56]* |
| HDAC4 | Overexpressed in ER+ breast cancers | [45, 47]* | | Underexpressed in ER+ breast cancers | [38, 43, 53, 54, 57]* |
| HDAC5 | Overexpressed in ER+ breast cancers | [34, 37, 39, 51, 52, 54, 57, 58]* |
| HDAC6 | Overexpressed in ER+ breast cancers | [45, 47, 51, 53]* | | High level of mRNA in ER+ breast cancer | [59] | | Increased expression in ER+ breast cancer | [60] | | Underexpressed in ER+ breast cancers | [32, 34, 37, 50–52]* |
| HDAC7 | Overexpressed in ER+ breast cancers | [36–38, 40, 44, 45, 47, 53, 58, 61]* |
| HDAC8 | Underexpressed in ER+ breast cancers | [45, 47, 56, 62]* |
| HDAC9 | Underexpressed in ER+ breast cancers | [32, 34, 35, 37–40, 45, 47, 52–54, 58]* |
| HDAC10 | Overexpressed in ER+ ductal breast cancer | [48]* |
| HDAC11 | Overexpressed in ER+ breast cancers | [35, 37–40, 43, 45, 47, 51–53, 56, 58]* |
| SIRT1 | Overexpressed in ER+ breast cancers | [38, 40, 46, 52, 53]* |
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