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Catalog No.S8141

9 publications

Cl-amidine Chemical Structure

CAS No. 1043444-18-3

Cl-amidine is an irreversible pan-peptidylarginine deiminase (PAD) inhibitor with IC50 values of 5.9 ± 0.3 μM, 0.8 ± 0.3 μM, 6.2 ± 1.0 μM for PAD4, PAD1 and PAD3, respectively. Cl-amidine induces apoptosis.

Selleck's Cl-amidine has been cited by 9 publications

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Biological Activity

Description Cl-amidine is an irreversible pan-peptidylarginine deiminase (PAD) inhibitor with IC50 values of 5.9 ± 0.3 μM, 0.8 ± 0.3 μM, 6.2 ± 1.0 μM for PAD4, PAD1 and PAD3, respectively. Cl-amidine induces apoptosis.
PAD1 [1]
(Cell-free assay)
PAD4 [1]
(Cell-free assay)
PAD3 [1]
(Cell-free assay)
0.8 μM 5.9 μM 6.2 μM
In vitro

Cl-amidine antagonizes the PAD4-mediated enhancement of the the p300GBD-GRIP1 interaction in a dose-dependent manner. The inhibitory effect of this compound is not a nonspecific one but is targeted at the active PAD4 enzyme[1]. Cl-amidine increases p53 expression in CD45 positive immune cells. It triggers the differentiation and apoptosis of multiple cancer cell lines that are p53+/+ and p53−/− (e.g., HL60, HT29, TK6, and U2-OS cells). Cl-amidine induces the expression of p53 and several downstream target genes including the cyclin dependent kinase inhibitor p21, GADD45, and the proapoptotic protein PUMA in U2-OS osteosarcoma cells[2].

Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
MDA-MB-231 M3HNTGN6fG:2b4jpZ4l1gSCjc4PhfS=> NH3oSGY1ODBidV2= M33NOVk3KGi{cx?= NUHHSZpYS3m2b4TvfIlkcXS7IHHnZYlve3RiaIXtZY4hVUSDLV3CMVI{OSClZXzsd{Bie3Onc4Pl[EBieyCmZXPy[YF{\SCrbjDj[YxtKG63bXLldkBifCB2MECgeW0h[W[2ZYKgPVYhcHK|IHL5JJRzgXCjbjDicJVmKGG|c3H5 NHT1Nmo9[SC2YYLn[ZQ:L1:kbHHub{chcHKnZk2nbJR1eHN8Lz;weYJu\WRwbnPibU5vdG1wbnnoModwfi9{M{SyNFYzPCd-MkO0NlA3OjR:L3G+
MDA-MB-231 MVTDfZRwfG:6aXPpeJkh[XO|YYm= MWWyNFAhfG9iNECwJJVO NIX2TpM6PiCqcoO= MX3DfZRwfG:6aXPpeJkh[WejaX7zeEBpfW2jbjDNSGEuVUJvMkOxJINmdGy|IHHzd4V{e2WmIHHzJIRm[3KnYYPlJIlvKGOnbHygeoli[mmuaYT5JIF1KDJyMDD0c{A1ODBidV2gZYZ1\XJiOU[gbJJ{KGK7IITyfZBidiCkbIXlJIF{e2G7 M1;0XVxiKHSjcnfleF0oZ2KuYX7rK{BpemWoPTfoeJRxezpxL4D1Zo1m\C6wY3LpMo5tdS6waXiu[493NzJ|NEKwOlI1Lz5{M{SyNFYzPDxxYU6=
HL60 NYHx[|N4TnWwY4Tpc44h[XO|YYm= M2XCWVUhfG9iMUCgeW0> M4rPcVE2KG2rboO= MmrjTY5pcWKrdHnvckBw\iCSQVS0JIlvKGi3bXHuJGhNPjBiY3XscJMh[XO|ZYPz[YQh[XNicnXkeYN1cW:wIHnuJGEzOzF6Nz3pcoR2[2WmIHPpeJJ2dGyrbnH0[YQhUDRibHX2[Ywh[XRiNTD0c{AyOCC3TTDwdoVqdmO3YnH0[YQh\m:{IEG1JI1qdnNiZn;scI94\WRiYomgRVI{OTh5IHHk[Il1cW:wIH3lZZN2emWmIHHmeIVzKDF3IH3pcpMh[nliV3XzeIVzdiCkbH;0JIFv[Wy7c3nz MUO8ZUB1[XKpZYS9K39jdGGwazegbJJm\j1paIT0dJM7Ny:ydXLt[YQvdmOkaT7ucI0vdmmqLnfvek8{ODN2NEmwPUc,OzB|NES5NFk9N2F-
HEK293T M4DGcWZ2dmO2aX;uJIF{e2G7 NUnPXpFkOTBibl2geI8hOTByIIXN NXjjSpNFUW6qaXLpeIlwdiCxZjDoeY1idiC{ZXPvcYJqdmGwdDDQRWQ{KGW6cILld5Nm\CCrbjDISWszQTOWIHPlcIx{KGG|c3Xzd4VlKGG|IHPvcpZmenOrb36gc4YhSkGHRTD0c{B{d2SrdX2gZoVvgm:7bD3MMYNqfHK3bHzpcoUh[XRiMUCgcm0hfG9iMUCwJJVOKGK7IHPvcI9zcW2ndILpZ{BidmGueYPpdy=> NIjtW|M9[SC2YYLn[ZQ:L1:kbHHub{chcHKnZk2nbJR1eHN8Lz;3e5cv\WKrLnHjMpVsN2OqZX3icE9kd22yb4Xu[H9z\XCxcoTfZ4Fz\C:FSFXNRmwyQTZ{M{[xM{c,S2iHTVLMQE9iRg>?
HEK293T NEPIVXFHfW6ldHnvckBie3OjeR?= M2jmTFExOCC3TR?= NEPJbIczPCCqcoO= NFzFeohKdmirYnn0bY9vKG:oIIToZZB{cWejcnfpck1qdmS3Y3XkJINmdGxiZHXheIghcW5iaIXtZY4hUEWNMkmzWEBk\WyuczDveoVz\XiycnXzd4lv\yCqdX3hckBz\WOxbXLpcoFvfCCSQVSzJIF{e2W|c3XkJIF{KGmwY4LlZZNmKGmwIHPlcIwhe3W{dnn2ZYwh[XRiMUCwJJVOKHS{ZXH0[YQhOTVibXnud{BxemmxcjD0c{B1cGGyc3nnZZJocW5iYXTkbZRqd25ibXXhd5Vz\WRiYX\0[ZIhOjRiaILzJIRzfWdidILlZZRu\W62IHL5JI1mfGi7bHXu[UBjdHV? NIT5RnA9[SC2YYLn[ZQ:L1:kbHHub{chcHKnZk2nbJR1eHN8Lz;3e5cv\WKrLnHjMpVsN2OqZX3icE9kd22yb4Xu[H9z\XCxcoTfZ4Fz\C:FSFXNRmwyQTZ{M{[xM{c,S2iHTVLMQE9iRg>?

... Click to View More Cell Line Experimental Data

Methods Test Index PMID
Western blot
PAD4 / H3R17Me / H3Cit / p21 / p53 / p-p53 ; 

PubMed: 18505818     

Western blot analyses of the levels of PAD4, H3R17Me, H3Cit, p21, p53, and p53 Ser15 phosphorylation in U2OS cells after treatment with Cl-amidine for 24 h. The level of PAD4 was unaltered (note the doublet of PAD4 detected on the Western blot). Tubulin and histone H3 were monitored to ensure equal protein loading.


PubMed: 29077055     

iNOS expression was detected by Western blotting with an anti-iNOS antibody. Anti-glyceraldehyde 3-phosphate dehydrogenase (GAPDH) was used as the loading control. Bottom panel: relative intensity of iNOS in upper panels with loading controls using three individuals of each group. Error bars represent SD. ** p < 0.05, *** p < 0.001. 

MMP-2 / MMP-9 ; 

PubMed: 28844713     

MDA-MB-231 cells were treated with 100 µM Cl-amidine. At indicated time, cells were collected and analyzed for MMP2/9 protein expression by immunoblot (I).

p-Elk-1 / Elk-1; 

PubMed: 21655091     

Dose-dependent effect of Cl-Amidine treatment on Elk-1 activation and ERK2 phosphorylation in MCF-7 cells. Different doses of Cl-Amidine were added to the normal MCF-7 cell culture media for 48 hours and western blots of cell lysates were then performed using anti-p-Elk-1, anti-Elk-1, anti-p-ERK and ERK2 antibodies. The graph on the right is a semi-quantitative analysis of the western blots (relative intensity) with an arbitrary number of the intensity ratio of p-Elk-1 compared to total Elk-1, or p-ERK compared to total ERK2 using Image J software. 

18505818 29077055 28844713 21655091
In vivo Cl-amidine treatment inhibits NZM(New Zealand mixed 2328) NET(neutrophil extracellular trap) formation in vivo and significantly alters circulating autoantibody profiles and complement levels while reducing glomerular IgG deposition. Further, Cl-amidine increases the differentiation capacity of bone marrow endothelial progenitor cells, improves endothelium-dependent vasorelaxation, and markedly delays time to arterial thrombosis induced by photochemical injury. Cl-amidine delays thrombosis development in NZM mice. It inhibits PADs in mice without significant toxicity and improves disease phenotypes in animal models of inflammatory arthritis and inflammatory bowel disease[3]. And It is shown to reduce disease severity in mouse models of ulcerative colitis and RA[2].


Cell Research:


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  • Cell lines: CV-1 cells
  • Concentrations: 0-200 μM
  • Incubation Time: 40 h
  • Method:

    CV-1 cells are transiently transfected with plasmids encoding a luciferase reporter construct, p300GBD fused to the Gal4 DNA binding domain, the p300 binding domain of GRIP1 (i.e., the AD1 domain) fused to the VP16 activation domain (AD), and either wild-type PAD4 or the catalytically defective C645S mutant. Cl-amidine (0-200 μM) is then added to the cell culture medium and incubated for 40 h. Cell extracts are then prepared, and the luciferase activity present in these extracts is quantified. 

    (Only for Reference)
Animal Research:


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  • Animal Models: DSS mouse model of colitis (genetic background:C57BL/6 mice)
  • Dosages: 75 mg/kg (i.p); 5, 25, and 75 mg/kg(oral)
  • Administration: by oral gavage or i.p
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 84 mg/mL warmed (197.74 mM)
Ethanol 84 mg/mL warmed (197.74 mM)
Water 70 mg/mL warmed (164.78 mM)

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 424.8


CAS No. 1043444-18-3
Storage powder
in solvent
Synonyms N/A
Smiles C1=CC=C(C=C1)C(=O)NC(CCCN=C(CCl)N)C(=O)N.C(=O)(C(F)(F)F)O

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID