Mechanisms of tissue factor induction by the uremic toxin indole-3  acetic acid through aryl hydrocarbon receptor/nuclear factor-kappa B  signaling pathway in human endothelial cells

2019-12-23 08:15:00


Tawfik Addi1,2 · Stéphane Poitevin1 · Nathalie McKay1 · Kamel Eddine El Mecherfi2,3 · Omar Kheroua2 · Noémie Jourde‑Chiche1,4 · Alix de Macedo5 · Bertrand Gondouin6 · Claire Cerini1 · Philippe Brunet1,4 · Françoise Dignat‑George1 · Stéphane Burtey1,4 · Laetitia Dou1

 

 

 

Cardiovascular disease (CVD) is the leading cause of death  in patients with chronic kidney disease (CKD) (Go et al. 2004; Tonelli et al. 2006). Thrombosis is a key event in CVD; and CKD is associated with an increased thrombotic risk (Daneschvar et al. 2008; Wattanakit and Cushman 2009; Carney 2016). In patients with CKD, the balance of the coagulation system is dysregulated, with higher levels of factor VII,  factor VIII, thrombin and tissue factor (TF) (Jalal et al. 2010; Huang et al. 2017). Accumulation of some uremic toxins normally eliminated by the kidney is correlated with CVD and mortality in patients with CKD (Barreto et al. 2009; Moradi et al. 2013; Han et al. 2015; Storino et al. 2015). The uremic toxin indole-3 acetic acid (IAA) is an independent predictor of cardiovascular events and mortality in patients with CKD (Dou et al. 2015). IAA is a uremic indolic toxin derived from the metabolization of dietary tryptophan by the gut microbiota (Fernandez-Prado et al. 2017). Because of its proteinbinding (Jourde-Chiche et al. 2009), IAA is poorly removed by dialysis (Neirynck et al. 2013). In cultured endothelial cells, IAA promotes the expression of a proinflammatory phenotype (Gondouin et al. 2013; Dou et al. 2015). IAA also increases the endothelial expression and procoagulant activity of TF (Gondouin et al. 2013), the principal initiator of blood coagulation (Camerer et al. 1996). Tissue factor expression is induced by various stimuli, such as pro-inflammatory cytokines, lipopolysaccharides (LPS), growth factors, or thromboxane A2, via different transcription factors: NF-κB, AP-1, NFAT or Egr-1 (Bode and Mackman 2014). Interestingly, we have described that indolic toxins induce TF expression by a new pathway: the aryl hydrocarbon receptor (AhR) pathway (Gondouin et al. 2013). AhR was initially described as a receptor of some environmental contaminants, especially 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) (Hankinson 1995; Mandal 2005); and IAA is an endogenous agonist of AhR (Heath-Pagliuso et al. 1998).

 

In resting cells, AhR forms a complex with HSP90, XAP2 and p23 in the cytoplasm (Heid et al. 2000; Petrulis and Perdew 2002). After ligand binding to AhR, the complex dissociates, resulting in AhR translocation into the nucleus and dimerization with the aryl hydrocarbon nuclear translocator (ARNT).  The AHR/ARNT heterodimer binds to the XRE (Xenobiotic Response Element) sequences on the promoters of AhR target genes such as CYP1A1, CYP1A2, or CYP1B1 (Dolwick et al. 1993; Fujii-Kuriyama and Mimura 2005). In addition to this direct genomic pathway, a non-genomic inflammatory AhR 
pathway, independent of ARNT, has been described (Zhao et al. 2002; Sciullo et al. 2008; Matsumura 2009; Kim et al. 2012). AhR ligands, such as TCDD, induce the expression of proteins involved in inflammation such as IL-6, RANTES, TNF, and COX-2 (Zhao et al. 2002; Sciullo et al. 2008; Matsumura 2009; Kim et al. 2012). In the non-genomic pathway, AhR acts as a signaling molecules that interacts with multiple signaling pathways (Borlak and Jenke 2008; Henklová et al. 2008; Ma et al. 2009; Puga et al. 2009a). We recently reported that a non-genomic pathway of AhR involving p38MAPK/NF-κB signaling is crucial for the induction of endothelial COX-2 by IAA (Dou et al. 2015).


Until now, the mechanisms through which AhR controls TF expression in endothelial cells were poorly understood. The objective of the present work was, therefore, to determine the signaling pathways and the transcriptions factors involved in AhR-mediated TF induction by IAA.

 

Methods Endothelial cell culture
HUVEC were obtained from umbilical cord vein by collagenase digestion as described (Jaffe et al. 1973) and grown to the fourth passage in EGM-2 medium (Lonza, France) (containing 2% fetal bovine serum), under standard cell culture conditions (humidified atmosphere at 37 °C, 5% CO2). Human aortic endothelial cells (HAoEC) and cardiacderived microvascular endothelial cells (HMVEC-C) were 
obtained from Lonza. HMVEC-C were grown to the fifth passages in EGM-2 MV medium (Lonza, France) (containing 5% fetal bovine serum) under standard cell culture conditions. HAoEC were grown to the fifth passage in EGM-2 medium under standard cell culture conditions.

 

Effect of the uremic toxin IAA
Cells were incubated in the presence of IAA (Sigma-Aldrich, France) at 50 µM, the highest concentration described in uremic patients (Vanholder et al. 2003). They were treated during indicated times, with or without the AhR Inhibitor CH-229131 at 10 µM (Sigma-Aldrich), the NF-κB inhibitor BAY 11-7082 at 10 µM (Merck Chemicals), the PKC inhibitor Bisindolymaleimide I at 5 µM (Merck Chemicals), the p38 inhibitor SB203580 at 10 µM (Sigma-Aldrich), the ERK1/2 inhibitor PD98059 at 10 µM (Sigma-Aldrich), and the transcription inhibitor Actinomycin D at 1 µg/ml (Sigma-Aldrich). Because IAA was diluted in ethanol, ethanol 1/1000 was used as control. In some experiments, human serum albumin (LFB, France) was added in the culture medium, at the concentration found in human serum (4 g/dL).

 

SiRNA knockdown of AhR
HUVEC were transfected with siRNA control (Negative Universal Control, Stealth™ RNAi, Life Technologies, France) or a pool containing three Silencer® Select siRNA directed against AhR (1200, 1999 and 1998, Life Technologies, France) by magnetofection using SilenceMag beads (OZ Biosciences, France), according to the manufacturer’s instructions. The knockdown of AhR was verified by western blot on cell extracts 48 h after transfection (Supplemental Fig. 1). TF induction and p50 nuclear translocation were determined 48 h after transfection.

 

RNA extraction and quantitative RT‑PCR analysis of mRNA expression
Total RNA was extracted by an RNeasy mini-kit (Qiagen, France). RT was performed on 500 ng of total RNA using the Takara PrimeScript™ RT reagent Kit (Ozyme, Saint Quentin en Yvelines, France) followed by qPCR on 25 ng of cDNA using the Takara SYBR qPCR Premix Ex Taq (Ozyme). We quantified the following target genes: TF, CYP1A1, and CYP1B1. The housekeeping gene HPRTwas used for normalization of the target gene values. The sequences of primers were as follows: TF forward: 5′TGC AGTAGCTCCAACAGTGC3’, TF reverse: 5′GAGTGTATG GGCCAGGAGAA3’; CYP1A1 forward: 5′GACAGATCC CATCTGCCCTA 3′, CYP1A1 reverse: 5′ATAGCACCA TCAGGGGTGAG 3; CYP1B1 forward: 5′ TGATGGACG CCTTTATCCTC 3′, CYP1B1 reverse: 5′ CCACGACCT GATCCAATTCT 3′; HPRT forward: 5′GGATTATACTGC CTGACCAAGGAAAGC 3′, HPRT reverse: 5′ GAGCTA TTGTAATGACCAGTCAACAGG3′.

 

All PCR reaction efficiencies were determined with MxPro software (Agilent) and were always between 90 and 110%. The fusion curves were analyzed to assess the specificity of detected fluorescence. Fold change of mRNA expression vs. control condition (ethanol) was calculated using the 2−ΔΔCt method. The transcript for the housekeeping gene HPRT was used for data normalization.

 

Western blotting and densitometry analysis of Western blots
HUVEC were incubated with 50 µM IAA, or with ethanol diluted 1/1000 (vehicle control) during 30 min, with or without the AhR Inhibitor CH-229131 at 10 µM (SigmaAldrich). Some experiments were also performed on HUVECs transfected with AhR siRNA or control siRNA, and cells were stimulated with IAA 50 µM 48 h after transfection. Nuclear extracts were prepared using Cayman Chemical’s Nuclear Extraction Kit (interchim, France). 

 

Cytosolic extracts were prepared using 1 ml of lysis buffer containing 20 mM MOPS, 50 mM β-glycerolphosphate, 50 mM sodium fluoride, 1 mM sodium orthovanadate, 5 mM EGTA, 2 mM EDTA, 1% NP40, 1 mM dithiothreitol (DTT), 1 mM benzamidine, 1 mM phenylmethanesulphonylfluoride (PMSF) and 10 µg/mL leupeptin and aprotinin. The cells were incubated 10 min on ice and then collected with a scraper. The cytosolic extracts were obtained after centrifugation of cell lysates at 18,000 g for 15 min. Protein concentrations were measured with the Bicinchoninic Acid Kit (BCA1, Sigma-Aldrich).

 

Samples were mixed with LDS sample buffer and proteins were separated using 4–12% NuPAGE™ protein gel (Life technologies). Proteins were transferred to nitrocellulose membrane and blocked with 5%skim milk for 1 h at room temperature. The membrane was incubated overnight at 4 °C with antibodies directed against AhR (Santa Cruz, France), against NF-kB p50 (Cell Signaling, Ozyme, France), or actin (Cell Signaling, France), and then with the secondary peroxidase-conjugated antibody (Beckman-Coulter, France). Revelations were done by chemiluminescence (ECL Western blotting substrate, Pierce). Gel images were captured using the Syngene GBox (Ozyme) and analyzed with the software geneSys (Ozyme).

 

Study of NF‑κB and AP‑1 nuclear levels
After HUVEC incubation with 50 µM IAA during 30 min, with or without the AhR Inhibitor CH-229131 at 10 µM (Sigma-Aldrich), the NF-κB inhibitor BAY 11-7082  at 10 µM (Merck Chemicals), the PKC inhibitor Bisindolymaleimide I at 5 µM, the p38 inhibitor SB203580 at 10 µM (Sigma-Aldrich), nuclear extracts were prepared using Cayman Chemical’s Nuclear Extraction Kit (interchim, France). NF-κB p50 was detected in nuclear extracts by Cayman Chemical’s NF-κB (human p50) combo transcription factor assay kit (interchim). This kit is a 96-well ELISA with a specific double stranded DNA sequence containing the NF-KB response element. NF-KB p50 contained in nuclear extracts is detected with a specific primary antibody and a secondary antibody HRP-conjugated that provides a colorimetric 
readout à 450 nm.

 

Endothelial p65 expression in nuclear extracts was measured after 30 min incubation of HUVEC with IAA 50 µM and detected in nuclear extracts by the Cayman Chemical’s NF-κB (human p50/p65) combo transcription factor assay kit (interchim). AP-1 subunits c-Fos and c-Jun were detected in nuclear extracts by the AP1 (c-Fos/FosB/Fra1/c-Jun/JunB/JunD) transcription factor assay kit (Abcam, Paris, France).
Chromatin immunoprecipitation (ChIP) assay HUVEC monolayers (6×106 cells) were treated with IAA (50 µM) or ethanol (vehicle) for 60 min. Cells were fixed by adding formaldehyde directly to the medium to a final concentration of 1% and incubated for 10 min at room temperature then 40 min at 4 °C. ChIP assay was performed using the EZ-Magna ChIP™ A/G Chromatin Immunoprecipitation Kit (Merck Millipore, France), according to the kit instructions. Immunoprecipitations were performed overnight at 4 °C with 5 µg of rabbit IgG (control IgG) or rabbit polyclonal antibody against AhR (Santa Cruz Biotechnology, Tebu-Bio, France). Real-time PCR quantification of ChIP enrichments was run on a MX3000P instrument (Stratagene) using the Brilliant II SYBR Green QPCR Master Mix (Takara bio, France). Specific primer sequences for promoters were as follows: TF forward, 5′-GCCCTCCCTTTCCTGCCATAGA-3′, TF reverse: 5′-CCTCCCGGTAGGAAACTCCG-3′; CYP1A1 forward: 5′-ACGCAGACCTAGACCCTTTGC-3′, CYP1A1 reverse: 5′-CGGGTGCGCGATTGAA-3′; CYP1B1 forward: 5′-ATATGACTGGAGCCGACTTTCC-3′, CYP1B1 reverse: 5′-GGCGAACTTTATCGGGTTGA-3′. 

 

Fold enrichment was calculated using the 2− ΔΔCt method, where ΔΔCt represents the difference between threshold cycles of experimental rabbit polyclonal antibodies against AhR over rabbit control IgG.


Transient transfection of HUVEC and Luciferase Promoter Assay
The human TF wild-type promoter (−227 hTF WT), the TF mutant AP-1 (−227 hTF mAP1) and the TF-κB mutant (−227 hTF mTF-κB) reporter plasmids in pGL2 basic were a gift from Nigel Mackman (Addgene plasmid # 15442, 15443, 15444 respectively). HUVEC (1.5×105 cells) were plated into 6-well plates in EGM-2 medium 16 h before transfection. Cells were then incubated 1 h before transfection with Opti-MEM™ reduced-serum medium (Gibco, Life Technologies, France). 

 

Transfection was performed using Lipofectamine 2000 (Life Technologies, France) associated with magnetofection using CombimagTMbeads (OZ Bioscience, Marseille, France) according to the manufacturer’s instructions. Briefly, reporter plasmids (1 µg) were mixed with 2 µl of Lipofectamine in 200 µl of Opti-MEM reduced serum medium for 20 min then 1 µl of Combimag™ beads was added to DNA-Lipofectamine complexes. The DNA-Lipofectaminebeads complexes were incubated for 20  min at room temperature, incubated with HUVEC for 1 h at 37 °C on a magnetic plate in the 5% CO2 incubator and then replaced with growth medium. After 48 h, HUVEC were treated with IAA or ethanol (vehicle control) for 6 h. Cells were lysed in a reporter lysis buffer and lysates were assayed for lucif-erase activities using the luciferase assay system and the GloMax®-Multi detection system (Promega, France). The pSV-β-Galactosidase control vector (Promega) was cotransfected so that the transfection efficiencies could be normalized with the β-galactosidase activities determined using the b-Glo® assay system (Promega).

 

Patients
We performed a single center prospective study in 92 hemodialyzed patients, selected according to the following criteria: age>18 years; no cardiovascular event (myocardial infarction, stroke, peripheral vascular disease with amputation or need for angioplasty), infection, or surgical intervention (except for vascular access angioplasty) in the last 3 months; no pregnancy; no recent history of malignancy; no intake of corticosteroids or immunosuppressive agents. Patients had been dialyzed at least 3 times a week for a minimum of 6 months. Patients’ blood samples were drawn before the mid-week hemodialysis session. Blood samples were drawn in BD Vacutainer → tubes containing lithium heparin for biochemical analyses, EDTA for hemoglobin measurement, citrate for TF measurement, and in BD 
Vacutainer → SST tubes for IS, IAA, p-cresylsulfate, and β2-microglobulin measurement. Standard laboratory procedures were used for blood chemistry evaluations. Total IS, IAA, and p-cresylsulfate were measured by HPLC, according to Calaf et al. (2011).

 

Informed consent was obtained from all individual participants included in the study. The study was approved by the local ethics committee and conforms to the principles outlined in the Declaration of Helsinki.

 

Measurement of TF by enzyme‑linked immunosorbent assay
TF was quantified in citrated human plasma and in cell lysates of HUVEC with the enzyme-linked immunosorbent assay (ELISA) kit Quantikine Human Coagulation Factor III/Tissue Factor (R&D Systems, Lille, France) according to the instructions of the manufacturer.

 

Statistical analyses
For in vitro studies, statistical analyses were performed with the Prism (GraphPad Software Inc, CA). Significant differences were revealed by the Wilcoxon signed rank test or by the Mann Whitney test. Data are expressed as mean±SEM of independent experiments performed on different cell preparations.

 

In CKD patients, data are expressed as mean±standard deviation (SD) for values with normal distribution or median (min; max) for non-normally distributed values. Numerical variables were tested for normality by the Shapiro–Wilk test. 

 

Correlations between plasma TF and continuous variables were obtained using Spearman correlation coefficients; statistical analyses were performed with the Prism (GraphPad Software Inc, CA) software. To identify factors independently associated with plasma TF, multiple linear regression analyses were performed with the R software. A p value lower than 0.05 was considered significant.

 

Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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CAS No.:1041059-16-8 MDL No.:MFCD03180319

MF:C12H15NO2S MW:237.3180

89-55-4

3,3-dimethyl-1,2,3,6-tetrahydropyridine-2,6-dione

Catalog No.:AA01ABHS

CAS No.:10411-16-2 MDL No.:MFCD20728275

MF:C7H9NO2 MW:139.1519

89-55-4

2,3-Dichloroisobutyric acid

Catalog No.:AA003FEU

CAS No.:10411-52-6 MDL No.:MFCD00068279

MF:C4H6Cl2O2 MW:156.9952

89-55-4

5,5-dimethyl-2-(naphthalen-1-yl)-1,3-thiazolidine-4-carboxylic acid

Catalog No.:AA00IV8M

CAS No.:1041100-89-3 MDL No.:MFCD01567577

MF:C16H17NO2S MW:287.3767

89-55-4

Phellodendrine Hydrochloride

Catalog No.:AA008UVY

CAS No.:104112-82-5 MDL No.:MFCD01732398

MF:C20H24ClNO4 MW:377.8619

89-55-4

1-(Naphth-1-yl)piperazine diHCl

Catalog No.:AA00HA7H

CAS No.:104113-71-5 MDL No.:MFCD00055161

MF:C14H17ClN2 MW:248.7512

89-55-4

Daidzein 7-β-D-Glucuronide 4’-Sulfate Disodium Salt

Catalog No.:AA008WDI

CAS No.:1041134-19-3 MDL No.:MFCD31562233

MF:C21H16Na2O13S MW:554.3885

89-55-4

4-(3,4-dichlorophenyl)piperidine-2,6-dione

Catalog No.:AA01BHRK

CAS No.:104115-69-7 MDL No.:MFCD18277004

MF:C11H9Cl2NO2 MW:258.1007

89-55-4

Ethyl 4,7-dichloro-1h-indole-2-carboxylate

Catalog No.:AA00HA7J

CAS No.:104115-70-0 MDL No.:MFCD04966955

MF:C11H9Cl2NO2 MW:258.1007

89-55-4

3-Methoxynaphthalene-2-boronic acid

Catalog No.:AA00386C

CAS No.:104115-76-6 MDL No.:MFCD12025968

MF:C11H11BO3 MW:202.0142

89-55-4

2-Methoxynaphthalene-1-boronic acid

Catalog No.:AA0084U2

CAS No.:104116-17-8 MDL No.:MFCD11044173

MF:C11H11BO3 MW:202.0142

89-55-4

5,6,7,8-TETRAHYDRO-1H-CYCLOHEPTA[C]FURAN-1,3(4H)-DIONE

Catalog No.:AA01DUV0

CAS No.:10412-04-1 MDL No.:MFCD09865945

MF:C9H10O3 MW:166.1739

89-55-4

2-(dichloromethylene)cyclohexanone

Catalog No.:AA01DSS6

CAS No.:10412-36-9 MDL No.:MFCD24690284

MF:C7H8Cl2O MW:179.0438

89-55-4

N-Benzyl-2-cyanoacetamide

Catalog No.:AA008RMW

CAS No.:10412-93-8 MDL No.:MFCD00461336

MF:C10H10N2O MW:174.1992

89-55-4

5-Ketohexanenitrile

Catalog No.:AA003MQX

CAS No.:10412-98-3 MDL No.:MFCD00010671

MF:C6H9NO MW:111.1418

89-55-4

Methyl 4-bromo-3-ethoxybenzoate

Catalog No.:AA019EJI

CAS No.:1041205-21-3 MDL No.:MFCD20486187

MF:C10H11BrO3 MW:259.0965

89-55-4

Methyl 3-iodo-1-methyl-1H-indazole-6-carboxylate

Catalog No.:AA007EO3

CAS No.:1041205-25-7 MDL No.:MFCD15071434

MF:C10H9IN2O2 MW:316.0951

89-55-4

1-(Difluoromethyl)-4-iodo-1h-pyrazole

Catalog No.:AA008Z1H

CAS No.:1041205-43-9 MDL No.:MFCD18633160

MF:C4H3F2IN2 MW:243.9813

89-55-4

2-(3-hydroxypropoxy)-1,25-dihydroxyvitamin D3

Catalog No.:AA008TCY

CAS No.:104121-92-8 MDL No.:MFCD25977156

MF:C30H50O5 MW:490.7150

89-55-4

Ethyl 2-(4-amino-3-nitrophenyl)acetate

Catalog No.:AA00HA7K

CAS No.:104126-70-7 MDL No.:MFCD16620936

MF:C10H12N2O4 MW:224.2133

89-55-4

1-{[3-(chloromethyl)phenyl]methyl}piperidine hydrochloride

Catalog No.:AA01C337

CAS No.:104126-78-5 MDL No.:MFCD29055220

MF:C13H19Cl2N MW:260.2027

89-55-4

(2E)-3-(4-bromophenyl)-2-cyanoprop-2-enamide

Catalog No.:AA00ITOJ

CAS No.:104127-29-9 MDL No.:MFCD00457409

MF:C10H7BrN2O MW:251.0794

89-55-4

N-ACETYL-S-(3-CARBOXY-1-METHYLPROPYL)-L-CYSTEINE, DISODIUM SALT

Catalog No.:AA008W34

CAS No.:1041285-62-4 MDL No.:MFCD04973536

MF:C9H13NNa2O5S MW:293.2478

89-55-4

methyl 2-amino-4-cyclohexylthiophene-3-carboxylate

Catalog No.:AA01B7RU

CAS No.:10413-33-9 MDL No.:MFCD08059070

MF:C12H17NO2S MW:239.3339

89-55-4

2-amino-4-tert-butylthiophene-3-carbonitrile

Catalog No.:AA00VTIO

CAS No.:10413-34-0 MDL No.:MFCD01566461

MF:C9H12N2S MW:180.2700

89-55-4

2-amino-4-isopropylthiophene-3-carbonitrile

Catalog No.:AA00946Q

CAS No.:10413-35-1 MDL No.:MFCD10695775

MF:C8H10N2S MW:166.2434

89-55-4

Ethyl 2,3,4-trimethoxybenzoate

Catalog No.:AA01FEWI

CAS No.:10413-86-2 MDL No.:MFCD06204287

MF:C12H16O5 MW:240.2524

89-55-4

1-propylcyclopropane-1-carboxylic acid

Catalog No.:AA019ZR6

CAS No.:104131-82-0 MDL No.:MFCD19229807

MF:C7H12O2 MW:128.1690

89-55-4

1-(propan-2-yl)cyclopropane-1-carboxylic acid

Catalog No.:AA019YY1

CAS No.:104131-92-2 MDL No.:MFCD19231072

MF:C7H12O2 MW:128.1690

89-55-4

Acriflavin-Biotin Conjugate

Catalog No.:AA007WG3

CAS No.:1041387-90-9 MDL No.:MFCD07357256

MF:C25H31N7O2S MW:493.6243

89-55-4

(N-DANSYL)BIOCYTINAMIDOETHYL METHANETHIOSULFONATE

Catalog No.:AA008RO3

CAS No.:1041392-69-1 MDL No.:MFCD16872053

MF:C31H46N6O7S4 MW:742.9929

89-55-4

2'-Amino-2'-deoxyadenosine

Catalog No.:AA007WBN

CAS No.:10414-81-0 MDL No.:MFCD06657636

MF:C10H14N6O3 MW:266.2566

89-55-4

TRIETHOXYSILYLPROPOXY(POLYETHYLENEOXY)DODECANOATE, tech-95

Catalog No.:AA008ZH3

CAS No.:1041420-54-5 MDL No.:

MF:C23H48O6Si MW:448.7091

89-55-4

5-Formyl-N,N-dimethylpyrazole-1-sulfonamide

Catalog No.:AA009464

CAS No.:1041421-94-6 MDL No.:MFCD23699497

MF:C6H9N3O3S MW:203.2190

89-55-4

1,3-Dichloro-6-fluoroisoquinoline

Catalog No.:AA008Z24

CAS No.:1041423-26-0 MDL No.:MFCD11656163

MF:C9H4Cl2FN MW:216.0392

89-55-4

3-Chloro-6-fluoroisoquinoline

Catalog No.:AA00HA7N

CAS No.:1041423-28-2 MDL No.:MFCD18837816

MF:C9H5ClFN MW:181.5941

89-55-4

methyl(thiophen-3-ylmethyl)amine hydrochloride

Catalog No.:AA01EIWE

CAS No.:1041424-94-5 MDL No.:MFCD03306022

MF:C6H10ClNS MW:163.6683

89-55-4

1H,4H,5H,6H-Cyclopenta[b]pyrrole-2-carboxylic acid

Catalog No.:AA01A54P

CAS No.:1041429-45-1 MDL No.:MFCD20645457

MF:C8H9NO2 MW:151.1626

89-55-4

3-(5-(Methoxycarbonyl)-1H-pyrrol-2-yl)propanoic acid

Catalog No.:AA01DT8I

CAS No.:1041430-19-6 MDL No.:MFCD20660037

MF:C9H11NO4 MW:197.1879

89-55-4

3,5-Dicarboxyphenylboronic acid, pinacol ester

Catalog No.:AA0084SP

CAS No.:1041434-13-2 MDL No.:MFCD11867793

MF:C14H17BO6 MW:292.0922

89-55-4

Peramivir trihydrate

Catalog No.:AA008TG3

CAS No.:1041434-82-5 MDL No.:MFCD09837902

MF:C15H34N4O7 MW:382.4531

89-55-4

N-[(2-FLUOROPHENYL)SULFONYL]LEUCINE

Catalog No.:AA01APVZ

CAS No.:1041437-98-2 MDL No.:MFCD03618988

MF:C12H16FNO4S MW:289.3231

89-55-4

N-[(3-CHLORO-4-FLUOROPHENYL)SULFONYL]LEUCINE

Catalog No.:AA01APVY

CAS No.:1041437-99-3 MDL No.:MFCD03618999

MF:C12H15ClFNO4S MW:323.7682

89-55-4

Cefditoren

Catalog No.:AA008SKY

CAS No.:104145-95-1 MDL No.:MFCD00865118

MF:C19H18N6O5S3 MW:506.5784

89-55-4

Gcle

Catalog No.:AA00HA7O

CAS No.:104146-10-3 MDL No.:MFCD00191253

MF:C24H23ClN2O5S MW:486.9678

89-55-4

4-Chlorothiazole-5-carboxaldehyde

Catalog No.:AA007WBQ

CAS No.:104146-17-0 MDL No.:MFCD09837291

MF:C4H2ClNOS MW:147.5828

89-55-4

(2S)-2-amino-2-{bicyclo[2.2.1]hept-5-en-2-yl}acetic acid

Catalog No.:AA01FMHI

CAS No.:1041465-89-7 MDL No.:MFCD30011211

MF:C9H13NO2 MW:167.2050

89-55-4

3,5-Dichloro-4-(1,1,2,2-tetrafluoroethoxy)aniline

Catalog No.:AA0084SI

CAS No.:104147-32-2 MDL No.:MFCD10000640

MF:C8H5Cl2F4NO MW:278.0310

89-55-4

4-Fluoro-1h-indazole-5-carboxylic acid

Catalog No.:AA00389K

CAS No.:1041481-59-7 MDL No.:MFCD11007930

MF:C8H5FN2O2 MW:180.1359

89-55-4

Methyl 4-acetyl-5-methylisoxazole-3-carboxylate

Catalog No.:AA007WBM

CAS No.:104149-61-3 MDL No.:MFCD00068116

MF:C8H9NO4 MW:183.1614

89-55-4

methyl 4-benzoyl-5-methyl-1,2-oxazole-3-carboxylate

Catalog No.:AA01A95B

CAS No.:104149-63-5 MDL No.:MFCD16547672

MF:C13H11NO4 MW:245.2307

89-55-4

methyl 5-(4-methoxyphenyl)-1,2,4-oxadiazole-3-carboxylate

Catalog No.:AA00IRBJ

CAS No.:104149-68-0 MDL No.:MFCD00974505

MF:C11H10N2O4 MW:234.2081

89-55-4

3-Methyl-1-phenylpentan-3-ol

Catalog No.:AA003EJF

CAS No.:10415-87-9 MDL No.:MFCD00021825

MF:C12H18O MW:178.2707

89-55-4

6-Chloro-n-(3,5-difluorophenyl)pyridine-3-sulfonamide

Catalog No.:AA01ABB9

CAS No.:1041507-44-1 MDL No.:MFCD12443439

MF:C11H7ClF2N2O2S MW:304.7003

89-55-4

4-[4-(2-methylpropyl)phenyl]butanoic acid

Catalog No.:AA00VTUY

CAS No.:1041514-31-1 MDL No.:MFCD11120107

MF:C14H20O2 MW:220.3074

89-55-4

2-[(Piperidine-1-sulfonyl)methyl]benzonitrile

Catalog No.:AA00HA7R

CAS No.:1041515-38-1 MDL No.:MFCD11120137

MF:C13H16N2O2S MW:264.3433

89-55-4

1-(2-Cyanophenyl)-N-(2-methoxyethyl)methanesulfonamide

Catalog No.:AA00HA7S

CAS No.:1041527-14-3 MDL No.:MFCD11123401

MF:C11H14N2O3S MW:254.3055

89-55-4

5-(morpholine-4-sulfonyl)thiophene-3-carboxylic acid

Catalog No.:AA019UGO

CAS No.:1041528-64-6 MDL No.:MFCD11122624

MF:C9H11NO5S2 MW:277.3173

89-55-4

2-Methyl-4-(3-methyl-1,2,4-oxadiazol-5-yl)aniline

Catalog No.:AA019VW4

CAS No.:1041529-30-9 MDL No.:MFCD11121317

MF:C10H11N3O MW:189.2138

89-55-4

3-Chloro-4-(cyclohexyloxy)benzene-1-sulfonyl chloride

Catalog No.:AA01C377

CAS No.:1041531-84-3 MDL No.:MFCD11122871

MF:C12H14Cl2O3S MW:309.2088

89-55-4

N-(furan-2-ylmethyl)-4-methyl-1,3-thiazol-2-amine

Catalog No.:AA01ABY3

CAS No.:1041533-19-0 MDL No.:MFCD11122892

MF:C9H10N2OS MW:194.2535

89-55-4

4-bromo-N-{[4-(trifluoromethyl)phenyl]methyl}aniline

Catalog No.:AA01A41H

CAS No.:1041538-12-8 MDL No.:MFCD12443795

MF:C14H11BrF3N MW:330.1430

89-55-4

5-(3-fluorophenoxymethyl)-2-methoxyaniline

Catalog No.:AA01A7NE

CAS No.:1041538-54-8 MDL No.:MFCD11123632

MF:C14H14FNO2 MW:247.2649

89-55-4

5-Bromo-n-(pyridin-2-ylmethyl)pyridin-2-amine

Catalog No.:AA01B84F

CAS No.:1041542-35-1 MDL No.:MFCD11122322

MF:C11H10BrN3 MW:264.1212

89-55-4

2-(3,4-Dichlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4h)-yl)ethanamine

Catalog No.:AA019UBF

CAS No.:1041546-96-6 MDL No.:MFCD11618148

MF:C15H16Cl2N2S MW:327.2719

89-55-4

N-[(2-fluorophenyl)methyl]pyridin-4-amine

Catalog No.:AA01AB05

CAS No.:1041551-09-0 MDL No.:MFCD11122588

MF:C12H11FN2 MW:202.2275

89-55-4

2-{[2-(trifluoromethyl)phenyl]amino}benzonitrile

Catalog No.:AA01A2T5

CAS No.:1041551-15-8 MDL No.:MFCD12619061

MF:C14H9F3N2 MW:262.2299

89-55-4

3-(1-aminoethyl)-N-methylbenzene-1-sulfonamide

Catalog No.:AA01A9ZK

CAS No.:1041552-86-6 MDL No.:MFCD11121234

MF:C9H14N2O2S MW:214.2847

89-55-4

ethyl 4-(2,6-dichloro-3-fluorophenyl)-2,4-dioxobutanoate

Catalog No.:AA019XXR

CAS No.:1041553-00-7 MDL No.:MFCD12548642

MF:C12H9Cl2FO4 MW:307.1019

89-55-4

2-([4-(Propan-2-yl)benzene]amido)thiophene-3-carboxylic acid

Catalog No.:AA019V6C

CAS No.:1041555-04-7 MDL No.:MFCD12165927

MF:C15H15NO3S MW:289.3495

89-55-4

2-(4-chloro-2-hydroxybenzamido)thiophene-3-carboxylic acid

Catalog No.:AA01ABE6

CAS No.:1041557-15-6 MDL No.:MFCD12443778

MF:C12H8ClNO4S MW:297.7142

89-55-4

2-methoxy-5-[(4-methylpiperazin-1-yl)methyl]aniline

Catalog No.:AA01AA2J

CAS No.:1041561-44-7 MDL No.:MFCD11121421

MF:C13H21N3O MW:235.3253

89-55-4

4-[(Pyrrolidine-1-sulfonyl)methyl]benzonitrile

Catalog No.:AA00HA7X

CAS No.:1041561-96-9 MDL No.:MFCD11120636

MF:C12H14N2O2S MW:250.3168

89-55-4

1-(4-Cyanophenyl)-N-(2-methoxyethyl)methanesulfonamide

Catalog No.:AA00HA7Y

CAS No.:1041567-41-2 MDL No.:MFCD11119859

MF:C11H14N2O3S MW:254.3055

89-55-4

1-(3-Methyl-1,2,4-oxadiazol-5-yl)ethan-1-amine hydrochloride

Catalog No.:AA008V1A

CAS No.:1041578-67-9 MDL No.:MFCD11123108

MF:C5H9N3O MW:127.1445

89-55-4

4-difluoromethanesulfonamido-2-methoxybenzene-1-sulfonyl chloride

Catalog No.:AA01A36V

CAS No.:1041583-35-0 MDL No.:MFCD12617571

MF:C8H8ClF2NO5S2 MW:335.7326

89-55-4

3-amino-N-tert-butyl-2-methylbenzene-1-sulfonamide

Catalog No.:AA01AK6M

CAS No.:1041583-63-4 MDL No.:MFCD11121573

MF:C11H18N2O2S MW:242.3378

89-55-4

1-phenyl-2-(trifluoromethoxy)ethan-1-one

Catalog No.:AA01AJP2

CAS No.:104159-53-7 MDL No.:MFCD17976633

MF:C9H7F3O2 MW:204.1459

89-55-4

5-amino-N-cyclopropyl-2-methoxybenzene-1-sulfonamide

Catalog No.:AA01AK30

CAS No.:1041593-92-3 MDL No.:MFCD11120446

MF:C10H14N2O3S MW:242.2948

89-55-4

3-(2,4-di-tert-butylphenoxy)propanenitrile

Catalog No.:AA01AA27

CAS No.:1041594-75-5 MDL No.:MFCD12737040

MF:C17H25NO MW:259.3865

89-55-4

N-(3-ethoxypropyl)pyridin-4-amine

Catalog No.:AA01C08X

CAS No.:1041597-12-9 MDL No.:MFCD11121339

MF:C10H16N2O MW:180.2468

89-55-4

N,O-Bis(trimethylsilyl)acetamide

Catalog No.:AA00396J

CAS No.:10416-59-8 MDL No.:MFCD00008270

MF:C8H21NOSi2 MW:203.4294

89-55-4

5-methyl-4,5-dihydro-1,3-thiazol-2-amine hydrochloride

Catalog No.:AA01B8SC

CAS No.:10416-82-7 MDL No.:MFCD00727985

MF:C4H9ClN2S MW:152.6457

89-55-4

N-tert-Butyl-1-(4-cyanophenyl)methanesulfonamide

Catalog No.:AA00HA80

CAS No.:1041602-66-7 MDL No.:MFCD11123761

MF:C12H16N2O2S MW:252.3326

89-55-4

N-(3-Aminophenyl)-n'-cyclopropylurea

Catalog No.:AA00HA81

CAS No.:1041603-13-7 MDL No.:MFCD10686667

MF:C10H13N3O MW:191.2297

89-55-4

2-methyl-1-(3-methyl-1,2,4-oxadiazol-5-yl)propan-1-amine

Catalog No.:AA01AHHE

CAS No.:1041603-68-2 MDL No.:MFCD11122292

MF:C7H13N3O MW:155.1976

89-55-4

5-bromo-N-[2-(pyridin-2-yl)ethyl]pyridin-2-amine

Catalog No.:AA01B8C8

CAS No.:1041604-47-0 MDL No.:MFCD11122303

MF:C12H12BrN3 MW:278.1478

89-55-4

1-(2-hydroxyethyl)-6-oxo-1,6-dihydropyridine-3-carboxylic acid

Catalog No.:AA01DUV2

CAS No.:1041605-13-3 MDL No.:MFCD11122312

MF:C8H9NO4 MW:183.1614

89-55-4

4-(Naphthalen-1-yloxy)benzonitrile

Catalog No.:AA01B8TI

CAS No.:1041608-24-5 MDL No.:MFCD12737236

MF:C17H11NO MW:245.2753

89-55-4

2-[4-(2-methylbutan-2-yl)cyclohexyl]acetic acid

Catalog No.:AA01B8G9

CAS No.:1041608-95-0 MDL No.:MFCD11123268

MF:C13H24O2 MW:212.3285

89-55-4

1-Propanamine, N,N-dimethyl-2,3-bis[(9Z)-9-octadecenyloxy]-

Catalog No.:AA007EJQ

CAS No.:104162-47-2 MDL No.:MFCD22200991

MF:C41H81NO2 MW:620.0873

89-55-4

N-(1-(2,3-dioleyloxy)propyl)-N,N,N-trimethylammonium

Catalog No.:AA003S4C

CAS No.:104162-48-3 MDL No.:MFCD00145456

MF:C42H84ClNO2 MW:670.5749

89-55-4

(5-ethylthiophen-2-yl)methanamine

Catalog No.:AA019ND9

CAS No.:104162-80-3 MDL No.:MFCD00966033

MF:C7H11NS MW:141.2339

89-55-4

(5-Methylthiophen-2-yl)methanamine

Catalog No.:AA0084S8

CAS No.:104163-34-0 MDL No.:MFCD00965306

MF:C6H9NS MW:127.2074

89-55-4

(3-Methyl-2-thienyl)methylamine

Catalog No.:AA003BQ0

CAS No.:104163-35-1 MDL No.:MFCD02093988

MF:C6H9NS MW:127.2074

89-55-4

(5-Methylthiophen-3-yl)methanamine

Catalog No.:AA01AOZL

CAS No.:104163-37-3 MDL No.:MFCD19213738

MF:C6H9NS MW:127.2074

89-55-4

(4-methylthiophen-3-yl)methanamine

Catalog No.:AA00919X

CAS No.:104163-38-4 MDL No.:MFCD23774679

MF:C6H9NS MW:127.2074

89-55-4

(4-Methyl-2-thienyl)methylamine

Catalog No.:AA008TVL

CAS No.:104163-39-5 MDL No.:MFCD06657973

MF:C6H9NS MW:127.2074

89-55-4

[4-[4-[3-Oxo-6′-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)spiro[isobenzofuran-1(3H),9′-[9H]xanthen]-3′-yl]-1-piperazinyl]butyl]triphenyl-phosphonium iodide

Catalog No.:AA0096U3

CAS No.:1041634-69-8 MDL No.:MFCD22683825

MF:C52H53BIN2O5P MW:954.6769

89-55-4

Silane, germylidynetris[trimethyl-

Catalog No.:AA01EIC0

CAS No.:104164-54-7 MDL No.:MFCD00192566

MF:C9H27GeSi3 MW:292.2072

89-55-4

Potassium isopropyltrifluoroborate

Catalog No.:AA008R5U

CAS No.:1041642-13-0 MDL No.:MFCD04112718

MF:C3H7BF3K MW:149.9922

89-55-4

Potassium trans-2-methylcyclohexyltrifluoroborate

Catalog No.:AA00364L

CAS No.:1041642-14-1 MDL No.:MFCD28955335

MF:C7H13BF3K MW:204.0826

89-55-4

1-Isopropyl-1h-pyrrole-2-carboxylic acid

Catalog No.:AA00J2EN

CAS No.:1041644-48-7 MDL No.:MFCD08704773

MF:C8H11NO2 MW:153.1784

89-55-4

methyl 5-cyano-1-methyl-1H-pyrrole-2-carboxylate

Catalog No.:AA01C1V3

CAS No.:1041644-52-3 MDL No.:MFCD12924329

MF:C8H8N2O2 MW:164.1613

89-55-4

11beta,17alpha,21-Trihydroxy-16alpha-Methyl-1,4-pregnadiene-3,20-dione

Catalog No.:AA008UHF

CAS No.:10417-63-7 MDL No.:MFCD28358923

MF:C22H30O5 MW:374.4706

89-55-4

Eicosapentaenoic acid

Catalog No.:AA0037XT

CAS No.:10417-94-4 MDL No.:MFCD00065716

MF:C20H30O2 MW:302.4510

89-55-4

TETRAPHENYLARSONIUM CHLORIDE MONOHYDRATE

Catalog No.:AA008VFB

CAS No.:104170-16-3 MDL No.:MFCD00011908

MF:C24H22AsClO MW:436.8055

89-55-4

Benzyl 5-chlorospiro[indoline-3,4'-piperidine]-1'-carboxylate

Catalog No.:AA009KSB

CAS No.:1041704-16-8 MDL No.:MFCD15071703

MF:C20H21ClN2O2 MW:356.8459

89-55-4

1-(4-Methoxy-2,5-dimethylphenyl)ethan-1-one

Catalog No.:AA01A68X

CAS No.:104174-28-9 MDL No.:MFCD11553435

MF:C11H14O2 MW:178.2277

89-55-4

4-(Butan-2-yloxy)benzaldehyde

Catalog No.:AA01F69P

CAS No.:104174-29-0 MDL No.:MFCD02629648

MF:C11H14O2 MW:178.2277

89-55-4

1-(4,5-dimethoxy-2-methylphenyl)ethan-1-amine hydrochloride

Catalog No.:AA01AHBC

CAS No.:104174-56-3 MDL No.:MFCD18483305

MF:C11H18ClNO2 MW:231.7191

89-55-4

[1-(3,4-Dimethoxyphenyl)propyl]amine hydrochloride

Catalog No.:AA00J1YX

CAS No.:104174-57-4 MDL No.:MFCD18483503

MF:C11H18ClNO2 MW:231.7191

89-55-4

3-(4-Ethylphenyl)propanal

Catalog No.:AA008XEC

CAS No.:104175-15-7 MDL No.:MFCD09028621

MF:C11H14O MW:162.2283

89-55-4

2,4-Diethylbenzoic acid

Catalog No.:AA003ANN

CAS No.:104175-23-7 MDL No.:MFCD20641288

MF:C11H14O2 MW:178.2277

89-55-4

Ethyl 2,3-dimethylbenzoate

Catalog No.:AA008Z7K

CAS No.:104175-24-8 MDL No.:MFCD00017523

MF:C11H14O2 MW:178.2277

89-55-4

2,6-Dimethylquinoline-4-carboxylic acid

Catalog No.:AA0084RV

CAS No.:104175-33-9 MDL No.:MFCD00487548

MF:C12H11NO2 MW:201.2212

89-55-4

1-BIOTINYLAMINO-3,6,9-TRIOXAUNDECANE-11-BROMIDE

Catalog No.:AA008WXR

CAS No.:1041766-91-9 MDL No.:MFCD03701138

MF:C18H32BrN3O5S MW:482.4328

89-55-4

(2-amino-1-phenylpropyl)dimethylamine

Catalog No.:AA01ACT6

CAS No.:104177-54-0 MDL No.:MFCD16061675

MF:C11H18N2 MW:178.2740

89-55-4

2-(3-methylbutyl)aniline

Catalog No.:AA01A7OX

CAS No.:104177-71-1 MDL No.:MFCD14705797

MF:C11H17N MW:163.2594

89-55-4

methyl(2-methyl-3-phenylpropyl)amine

Catalog No.:AA01DX52

CAS No.:104178-02-1 MDL No.:MFCD16781918

MF:C11H17N MW:163.2594

89-55-4

1-N-butyl-1-N-methylbenzene-1,4-diamine

Catalog No.:AA01AGJH

CAS No.:104178-20-3 MDL No.:MFCD09803412

MF:C11H18N2 MW:178.2740

89-55-4

[1-(2-methoxyphenyl)propyl](methyl)amine

Catalog No.:AA01BBCP

CAS No.:104178-98-5 MDL No.:MFCD10032966

MF:C11H17NO MW:179.2588

89-55-4

1-(4-Propoxyphenyl)ethanamine

Catalog No.:AA00J30Z

CAS No.:104179-00-2 MDL No.:MFCD09045402

MF:C11H17NO MW:179.2588

89-55-4

2-butoxy-5-methoxyaniline

Catalog No.:AA019MVG

CAS No.:104179-24-0 MDL No.:MFCD09734725

MF:C11H17NO2 MW:195.2582

89-55-4

methyl 3-hydroxy-2-methylquinoline-4-carboxylate

Catalog No.:AA00HA83

CAS No.:104179-54-6 MDL No.:MFCD27578194

MF:C12H11NO3 MW:217.2206

89-55-4

4,4-DiMethyl Retinoic Acid

Catalog No.:AA009234

CAS No.:104182-09-4 MDL No.:MFCD31562236

MF:C22H32O2 MW:328.4883

89-55-4

AZD7507

Catalog No.:AA01ENYE

CAS No.:1041852-85-0 MDL No.:MFCD28160337

MF:C23H27FN6O3 MW:454.4973

89-55-4

5-hydroxy-7-methyl-2,3-dihydro-1h-indole-2,3-dione

Catalog No.:AA01DX53

CAS No.:1041857-41-3 MDL No.:MFCD22556675

MF:C9H7NO3 MW:177.1568

89-55-4

4-(4-Aminophenoxy)pyridin-2(1h)-one

Catalog No.:AA0093X4

CAS No.:1041861-94-2 MDL No.:MFCD24038953

MF:C11H10N2O2 MW:202.2093

89-55-4

5-Chloro-7h-pyrrolo[2,3-d]pyrimidine

Catalog No.:AA00991C

CAS No.:1041864-02-1 MDL No.:MFCD12031334

MF:C6H4ClN3 MW:153.5691

89-55-4

5,5-dimethyl-2-[4-(2-methylpropyl)phenyl]-1,3-thiazolidine-4-carboxylic acid

Catalog No.:AA00IWZQ

CAS No.:1041870-96-5 MDL No.:MFCD00955335

MF:C16H23NO2S MW:293.4243

89-55-4

Benzeneacetic acid, 2-(methylthio)-

Catalog No.:AA007YBY

CAS No.:10419-34-8 MDL No.:MFCD11898922

MF:C9H10O2S MW:182.2395

89-55-4

2H-1-Benzopyran, 2-ethoxy-3,4-dihydro-

Catalog No.:AA00865U

CAS No.:10419-35-9 MDL No.:MFCD21603845

MF:C11H14O2 MW:178.2277

89-55-4

N-Benzoyl-D-phenylglycine

Catalog No.:AA007YBX

CAS No.:10419-67-7 MDL No.:MFCD02684297

MF:C15H13NO3 MW:255.2686

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