Catalog No.S2244 Synonyms: HDAC-42
Molecular Weight(MW): 312.36
AR-42 is an HDAC inhibitor with IC50 of 30 nM. Phase 1.
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One- to 2-month-old mice of both genotypes showed an increase in H3K4me3 (n = 5 to 6 per group) associated with a dose-dependent increase in neurogenesis in Kmt2d+/βGeo mice (monitored by normalized DCX expression) (n = 4 to 6 per group) upon treatment with the HDACi AR-42. There was no difference in either H3K4me3 or neurogenesis between Kmt2d+/βGeo and Kmt2d+/+ animals at a dose of 10 mg/kg per day.
Sci Transl Med 2014 6(256), 256ra135. AR-42 purchased from Selleck.
Colony formation assay showed significant inhibition following HB22.7 and AR42 treatment. Raji cells in semi-solid medium were treated with AR42 (0.25 uM), HB22.7 (0.4 ug/ml), or both. AR42 significantly inhibited anchorage-independent growth but the combination treatment further inhibited colony formation, *p<0.001.
Leuk Res 2014 8(11), 1320-6. AR-42 purchased from Selleck.
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|Description||AR-42 is an HDAC inhibitor with IC50 of 30 nM. Phase 1.|
|Features||Greater potency relative to SAHA.|
AR-42 treatment induces histone hyperacetylation and p21WAF/CIP1 overexpression, and inhibits the growth of DU-145 cells with IC50 of 0.11 μM.  HDAC42 is potent in suppressing the proliferation of U87MG and PC-3 cells, in part, because of its ability to down-regulate Akt signaling.  AR-42 inhibits the growth of PC-3 and LNCaP cells with IC50 of 0.48 μM and 0.3 μM, respectively. Compared to SAHA, AR-42 exhibits distinctly superior apoptogenic potency, and causes markedly greater decreases in phospho-Akt, Bcl-xL, and survivin in PC-3 cells.  AR-42 treatment induces growth inhibition, cell- cycle arrest, apoptosis, and activation of caspases-3/7 in malignant mast cell lines. AR-42 treatment induces down-regulation of Kit via inhibition of Kit transcription, disassociation between Kit and heat shock protein 90 (HSP90), and up-regulation of HSP70. AR-42 treatment down-regulates the expression of p-Akt, total Akt, phosphorylated STAT3/5 (pSTAT3/5), and total STAT3/5.  AR-42 potently inhibits the growth of JeKo-1, Raji, and 697 cells with IC50 of <0.61 μM. AR-42 also sensitizes CLL cells to TNF-Related Apoptosis Inducing Ligand (TRAIL), potentially through reduction of c-FLIP.  AR-42 treatment also induces autophagy through downregulation of Akt/mTOR signaling and inducing ER stress in hepatocellular carcinoma (HCC) cells. 
|In vivo||The growth of PC-3 tumor xenografts is suppressed by 52% and 67% after treatment with AR-42 at 25 mg/kg and 50 mg/kg, respectively, whereas SAHA at 50 mg/kg suppresses growth by 31%. In contrast to mice treated with SAHA, intratumoral levels of phospho-Akt and Bcl-xL are markedly reduced in AR-42 treated mice.  In the transgenic adenocarcinoma of the mouse prostate (TRAMP) model, administration of AR-42 not only decreases the severity of prostatic intraepithelial neoplasia (PIN) and completely prevents its progression to poorly differentiated carcinoma, but also shifts tumorigenesis to a more differentiated phenotype, suppressing absolute and relative urogenital tract weights by 86% and 85%, respectively.  AR-42 significantly reduces leukocyte counts, and prolongs survival in three separate mouse models of B-cell malignancy without evidence of toxicity. |
In vitro HDAC assay:HDAC activity is analyzed by using an HDAC assay kit. This assay is based on the ability of DU-145 nuclear extract, which is rich in HDAC activity, to mediate the deacetylation of the biotinylated [3H]-acetyl histone H4 peptide that is bound to streptavidin agarose beads. The release of [3H]-acetate into the supernatant is measured to calculate the HDAC activity. Sodium butyrate (0.25-1 mM) is used as a positive control.
-  Lu Q, et al. J Med Chem, 2005, 48(17), 5530-5535.
-  Chen CS, et al. J Biol Chem, 2005, 280(46), 38879-38887.
-  Kulp SK, et al. Clin Cancer Res, 2006, 12(17), 5199-5206.
|In vitro||DMSO||63 mg/mL (201.69 mM)|
|Ethanol||63 mg/mL (201.69 mM)|
|In vivo||0.5% methylcellulose+0.2% Tween 80||30 mg/mL|
* 1 mg/ml means slightly soluble or insoluble.
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Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT02795819||Suspended||Renal Cell Carcinoma|Soft Tissue Sarcoma|Metastatic Disease||Virginia Commonwealth University|Arno Therapeutics|National Cancer Institute (NCI)||July 2016||Phase 1|
|NCT02569320||Recruiting||Recurrent Plasma Cell Myeloma||Yvonne Efebera|Celgene|Ohio State University Comprehensive Cancer Center||May 2016||Phase 1|
|NCT02282917||Recruiting||Vestibular Schwannoma|Meningioma|Acoustic Neuroma|Neurofibromatosis Type 2||Massachusetts Eye and Ear Infirmary|Johns Hopkins University|Mayo Clinic|Stanford University|Ohio State University|Nationwide Childrens Hospital||September 2015||Early Phase 1|
|NCT01129193||Active, not recruiting||Adult Nasal Type Extranodal NK/T-cell Lymphoma|Anaplastic Large Cell Lymphoma|Angioimmunoblastic T-cell Lymphoma|Cutaneous B-cell Non-Hodgkin Lymphoma|Extranodal Marginal Zone B-cell Lymphoma of Mucosa-associated Lymphoid Tissue|Hepatosplenic T-cell Lymphoma|Intraocular Lymphoma|Nodal Marginal Zone B-cell Lymphoma|Peripheral T-cell Lymphoma|Post-transplant Lymphoproliferative Disorder|Prolymphocytic Leukemia|Recurrent Adult Burkitt Lymphoma|Recurrent Adult Diffuse Large Cell Lymphoma|Recurrent Adult Diffuse Mixed Cell Lymphoma|Recurrent Adult Diffuse Small Cleaved Cell Lymphoma|Recurrent Adult Grade III Lymphomatoid Granulomatosis|Recurrent Adult Hodgkin Lymphoma|Recurrent Adult Immunoblastic Large Cell Lymphoma|Recurrent Adult Lymphoblastic Lymphoma|Recurrent Adult T-cell Leukemia/Lymphoma|Recurrent Cutaneous T-cell Non-Hodgkin Lymphoma|Recurrent Grade 1 Follicular Lymphoma|Recurrent Grade 2 Follicular Lymphoma|Recurrent Grade 3 Follicular Lymphoma|Recurrent Mantle Cell Lymphoma|Recurrent Marginal Zone Lymphoma|Recurrent Mycosis Fungoides/Sezary Syndrome|Recurrent Small Lymphocytic Lymphoma|Refractory Chronic Lymphocytic Leukemia|Refractory Multiple Myeloma|Stage III Adult Burkitt Lymphoma|Stage III Adult Diffuse Large Cell Lymphoma|Stage III Adult Diffuse Mixed Cell Lymphoma|Stage III Adult Diffuse Small Cleaved Cell Lymphoma|Stage III Adult Hodgkin Lymphoma|Stage III Adult Immunoblastic Large Cell Lymphoma|Stage III Adult Lymphoblastic Lymphoma|Stage III Adult T-cell Leukemia/Lymphoma|Stage III Chronic Lymphocytic Leukemia|Stage III Cutaneous T-cell Non-Hodgkin Lymphoma|Stage III Grade 1 Follicular Lymphoma|Stage III Grade 2 Follicular Lymphoma|Stage III Grade 3 Follicular Lymphoma|Stage III Mantle Cell Lymphoma|Stage III Marginal Zone Lymphoma|Stage III Multiple Myeloma|Stage III Mycosis Fungoides/Sezary Syndrome|Stage III Small Lymphocytic Lymphoma|Stage IV Adult Burkitt Lymphoma|Stage IV Adult Diffuse Large Cell Lymphoma|Stage IV Adult Diffuse Mixed Cell Lymphoma|Stage IV Adult Diffuse Small Cleaved Cell Lymphoma|Stage IV Adult Hodgkin Lymphoma|Stage IV Adult Immunoblastic Large Cell Lymphoma|Stage IV Adult Lymphoblastic Lymphoma|Stage IV Adult T-cell Leukemia/Lymphoma|Stage IV Chronic Lymphocytic Leukemia|Stage IV Cutaneous T-cell Non-Hodgkin Lymphoma|Stage IV Grade 1 Follicular Lymphoma|Stage IV Grade 2 Follicular Lymphoma|Stage IV Grade 3 Follicular Lymphoma|Stage IV Mantle Cell Lymphoma|Stage IV Marginal Zone Lymphoma|Stage IV Mycosis Fungoides/Sezary Syndrome|Stage IV Small Lymphocytic Lymphoma|Testicular Lymphoma|Waldenstrom Macroglobulinemia||Craig Hofmeister|National Cancer Institute (NCI)|Arno Therapeutics|Ohio State University Comprehensive Cancer Center||May 2010||Phase 1|
|NCT01798901||Active, not recruiting||Adult Acute Myeloid Leukemia With 11q23 (MLL) Abnormalities|Adult Acute Myeloid Leukemia With Del(5q)|Adult Acute Myeloid Leukemia With Inv(16)(p13;q22)|Adult Acute Myeloid Leukemia With t(15;17)(q22;q12)|Adult Acute Myeloid Leukemia With t(16;16)(p13;q22)|Adult Acute Myeloid Leukemia With t(8;21)(q22;q22)|Recurrent Adult Acute Myeloid Leukemia|Recurrent Childhood Acute Myeloid Leukemia|Secondary Acute Myeloid Leukemia|Untreated Adult Acute Myeloid Leukemia||Alison Walker|Ohio State University Comprehensive Cancer Center||September 17, 2013||Phase 1|
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