embryonic cells

CHIR-99021 (CT99021) is an activator of the Wnt/β-catenin signaling pathway and a GSK-3α/β inhibitor (IC50=10/6.7 nM) with selective and oral activity.CHIR-99021 induces cellular autophagy, which enhances self-renewal in mouse and human embryonic stem cells.

HLY78 (4-Ethyl-5-methyl-5,6-dihydro-[1,3]dioxolo[4,5-j]phenanthridine) targets the DIX domain of Axin, is an activator of the Wnt/β-catenin signaling pathway and can enhance Axin-LRP6 binding to promote Wnt signaling.

SB 202190 (FHPI) is a p38 MAPK inhibitor that inhibits p38α and p38β2 (IC50=50/100 nM) selectively and cell-permeably. SB 202190 has antitumor activity and also induces the differentiation of human embryonic stem cells into cardiomyocytes.

Stemazole is a novel small molecule human stem/progenitor cell proliferation activator that promotes the survival of human embryonic stem cells and maintains stemness, and promotes the survival of oligodendrocyte precursor cells in vitro. Stemazole significantly increased cell survival and clone formation in a dose-dependent manner, reduced apoptosis, and promoted recovery of motor dysfunction and myelin repair. Stemazole can be used as a therapeutic agent in demyelinating disorders, promoting OPC survival in vitro and regeneration in vivo.

GSK-3484862 is a non-covalent Dnmt1 inhibitor. It induces DNA hypomethylation to against cancer.

Pifithrin-β hydrobromide (Cyclic PFT-α) is an inhibitor of p53; reversibly blocks p53-dependent transcriptional activation and apoptosis. Protects against neuronal death in models of stroke and neurodegenerative disorders. Active in vivo; protects mice from the side-effects of Y therapy associated with p53 induction. Supresses self-renewal of embryonic stem cells. Also aryl hydrocarbon receptor (AHR) agonist, causes upregulation of AHR target gene CYP1A1 (EC50 = 1.1 μM).

CHIR-99021 HCl (Laduviglusib HCl) is a highly potent and selective inhibitor of GSK-3α/β, with IC50 values of 10 nM and 6.7 nM respectively. It demonstrates remarkable selectivity for GSK-3, with over 500-fold selectivity over CDC2, ERK2, and other protein kinases. Additionally, CHIR-99021 HCl serves as a robust activator of the Wnt/β-catenin signaling pathway. Moreover, it exhibits the ability to enhance self-renewal in both mouse and human embryonic stem cells. Furthermore, CHIR-99021 HCl induces autophagy [1] [2] [3].

BML-278 is a SIRT1 activator with an EC150 of 1 μM.BML-278 increases H3K9 methylation and inhibits H3K9 acetylation in parental and maternal prokaryotes, and can be used to improve early embryonic development.BML-278 induces cell cycle arrest in primary human mesenchymal stromal cells at the G1/S phase, and can be used to delay senescence.BML-278 reduces microtubule protein acetylation in U937 cells and increases mitochondrial density in mouse C2C12 myoblasts. BML-278 reduces microtubule protein acetylation in U937 cells and increases mitochondrial density in mouse C2C12 myoblasts.

Cardiogenol C hydrochloride (Cardiogenol C) can induces the differentiation of ESCs into cardiomyocytes (EC50= 100 nM).

Elsinochrome A is a perylenequinone fungal metabolite that has been found inHypomycesand has anticancer activity.1Photoactivation of elsinochrome A induces the production of singlet oxygen and apoptosis in R366.4 rhesus monkey embryonic stem cells and HCe-8693 colorectal carcinoma cells when used at concentrations ranging from 1 to 100 μM. 1.Ma, L., Tai, H., Li, C., et al.Photodynamic inhibitory effects of three perylenequinones on human colorectal carcinoma cell line and primate embryonic stem cell lineWorld J. Gastroenterol.9(3)485-490(2003)

TWS-119 is an inhibitor of glycogen synthase kinase-3β (GSK-3β) that induces neuronal differentiation in pluripotent murine embryonal carcinoma cells and embryonic stem cells (ESCs).

Nemorosone is a polycyclic polyprenylated acylphloroglucinol (PPAP) originally isolated from C. rosea that has antiproliferative properties.1 Nemorosone inhibits growth of NB69, Kelly, SK-N-AS, and LAN-1 neuroblastoma cells (IC50s = 3.1-6.3 μM), including several drug-resistant clones, but not MRC-5 human embryonic fibroblasts (IC50 = >40 μM).2 It increases DNA fragmentation in LAN-1 cells in a dose-dependent manner, and decreases N-Myc protein levels and phosphorylation of ERK1/2 by MEK1/2. Nemorosone also inhibits growth of Capan-1, AsPC-1, and MIA-PaCa-2 pancreatic cancer cells (IC50s = 4.5-5.0 μM following a 72-hour treatment) but not human dermal and foreskin fibroblasts (IC50s = >35 μM).1 It induces apoptosis, abolishes the mitochondrial membrane potential, and increases cytosolic calcium concentration in pancreatic cancer cells in a dose-dependent manner. Nemorosone activates the caspase cascade in a dose-dependent manner and inhibits cell cycle progression, increasing the proportion of cells in the G0/G1 phase, in both neuroblastoma and pancreatic cancer cells.1,2 Nemorosone (50 mg/kg, i.p., per day) also reduces tumor growth in an MIA-PaCa-2 mouse xenograft model.3References1. Holtrup, F., Bauer, A., Fellenberg, K., et al. Microarray analysis of nemorosone-induced cytotoxic effects on pancreatic cancer cells reveals activation of the unfolded protein response (UPR). Br. J. Pharmacol. 162(5), 1045-1059 (2011).2. Díaz-Carballo, D., Malak, S., Bardenheuer, W., et al. Cytotoxic activity of nemorosone in neuroblastoma cells. J. Cell. Mol. Med. 12(6B), 2598-2608 (2008).3. Wold, R.J., Hilger, R.A., Hoheisel, J.D., et al. In vivo activity and pharmacokinetics of nemorosone on pancreatic cancer xenografts. PLoS One 8(9), e74555 (2013). Nemorosone is a polycyclic polyprenylated acylphloroglucinol (PPAP) originally isolated from C. rosea that has antiproliferative properties.1 Nemorosone inhibits growth of NB69, Kelly, SK-N-AS, and LAN-1 neuroblastoma cells (IC50s = 3.1-6.3 μM), including several drug-resistant clones, but not MRC-5 human embryonic fibroblasts (IC50 = >40 μM).2 It increases DNA fragmentation in LAN-1 cells in a dose-dependent manner, and decreases N-Myc protein levels and phosphorylation of ERK1/2 by MEK1/2. Nemorosone also inhibits growth of Capan-1, AsPC-1, and MIA-PaCa-2 pancreatic cancer cells (IC50s = 4.5-5.0 μM following a 72-hour treatment) but not human dermal and foreskin fibroblasts (IC50s = >35 μM).1 It induces apoptosis, abolishes the mitochondrial membrane potential, and increases cytosolic calcium concentration in pancreatic cancer cells in a dose-dependent manner. Nemorosone activates the caspase cascade in a dose-dependent manner and inhibits cell cycle progression, increasing the proportion of cells in the G0/G1 phase, in both neuroblastoma and pancreatic cancer cells.1,2 Nemorosone (50 mg/kg, i.p., per day) also reduces tumor growth in an MIA-PaCa-2 mouse xenograft model.3 References1. Holtrup, F., Bauer, A., Fellenberg, K., et al. Microarray analysis of nemorosone-induced cytotoxic effects on pancreatic cancer cells reveals activation of the unfolded protein response (UPR). Br. J. Pharmacol. 162(5), 1045-1059 (2011).2. Díaz-Carballo, D., Malak, S., Bardenheuer, W., et al. Cytotoxic activity of nemorosone in neuroblastoma cells. J. Cell. Mol. Med. 12(6B), 2598-2608 (2008).3. Wold, R.J., Hilger, R.A., Hoheisel, J.D., et al. In vivo activity and pharmacokinetics of nemorosone on pancreatic cancer xenografts. PLoS One 8(9), e74555 (2013).

Cyclo(Arg-Gly-Asp-D-Phe-Cys) TFA (Cyclo RGDfC) TFA, a cyclic RGD peptide, displays a high affinity for αvβ3 integrin, effectively disrupting cell-integrin interactions. It suppresses pluripotent marker expression in embryonic stem cells (ESCs) and reduces the tumorigenic capability of mESCs in vivo, making it valuable in tumor research [1].

Pyrintegrin is an β1-integrin agonist that promotes embryonic stem cells' survival. Pyrintegrin can be used as a podocyte-protective agent. Pyrintegrin enhances cell-extracellular matrix adhesion-mediated integrin signaling.

MitoBloCK-6 is a potent Erv1/ALR inhibitor, with an IC 50 of 900 nM and 700 nM, respectively. MitoBloCK-6 also inhibits Erv2 with IC 50 of 1.4 μM. MitoBloCK-6 can induce apoptosis via cytochrome c release in human embryonic stem cells (hESCs) [1].

MS351 is an antagonist of chromobox 7 (CBX7) that acts by binding the CBX7 chromodomain. It enhances the binding of long noncoding RNA to the CBX7 chromodomain when used at 25 μM. MS351 induces transcriptional derepression of CBX7 target genes, including p16 (INK4a), in mouse embryonic stem cells and human prostate cancer PC3 cells.

Phthalazinone pyrazole is potent, selective, and orally bioavailable inhibitor of Aurora-A kinase. Aurora-A is overexpressed in a variety of tumor types and displays oncogenic activity.

Epiblastin A is an inhibitor of Casein Kinase 1 (CK1). Epiblastin A engages CK1 isoenzymes in cell lysate and induces efficient conversion of epiblast stem cells (EpiSCs) into embryonic stem cells (cESCs).

AZT triphosphate TFA (3'-Azido-3'-deoxythymidine-5'-triphosphate TFA) is a active triphosphate metabolite of Zidovudine (AZT). AZT triphosphate TFA exhibits antiretroviral activity and inhibits replication of HIV. AZT triphosphate TFA also inhibits the DNA polymerase of HBV. AZT triphosphate TFA activates the mitochondria-mediated apoptosis pathway[1][2][3]. Treatment with 100 μM Zidovudine (AZT) for 48h disrupts the mitochondrial tubular network via accumulation of AZT triphosphate (AZT-TP) in H9c2 cells. AZT triphosphate accumulation causes downregulation of Opa1 and upregulation of Drp1. AZT triphosphate causes mitochondrial dysfunction, increases the production of cytotoxic reactive oxygen species (ROS), and impairs the balance of the mitochondrial quality control system in H9c2 cell model established from rat embryonic myoblasts[1]. [1]. Ryosuke Nomura, et al. Azidothymidine-triphosphate Impairs Mitochondrial Dynamics by Disrupting the Quality Control System. Redox Biol. 2017 Oct;13:407-417. [2]. Takeya Sato, et al. Engineered Human tmpk/AZT as a Novel Enzyme/Prodrug Axis for Suicide Gene Therapy. Mol Ther. 2007 May;15(5):962-70. [3]. K Y Hostetler, et al. Enhanced Oral Absorption and Antiviral Activity of 1-O-octadecyl-sn-glycero-3-phospho-acyclovir and Related Compounds in Hepatitis B Virus Infection, in Vitro. Biochem Pharmacol. 1997 Jun 15;53(12):1815-22.

Vascular endothelial growth factor receptor 2 (VEGFR2, also known as KDR and FLK1) is a receptor tyrosine kinase that regulates angiogenesis, vascular development, and embryonic hematopoiesis in response to VEGF isoforms A, C, and D. VEGFR2 kinase inhibitor II is a reversible, cell-permeable inhibitor of VEGFR2's kinase activity (IC50 = 70 nM). It less potently inhibits the platelet-derived growth factor receptor β (PDGFRβ; IC50 = 920 nM) and related receptor and non-receptor tyrosine kinases. VEGFR2 kinase inhibitor II blocks the growth of human umbilical vein endothelial cells stimulated with either VEGF or PDGF (IC50s = 110 nM and 2 μM, respectively).

IDE1 can induce definitive endoderm from embryonic stem cells. It has been shown to induce the differentiation of Sox17+/FoxA2+-expressing pancreatic progenitors from human and mouse embryonic stems cells (EC50: 125.5 nM in vitro) by activating the TGF-β signaling pathway. IDE1-derived endodermal cells injected into E8.75 mouse embryos ex vivo have been shown to incorporate into the developing gut tube, contributing to its formation.

OAC2 is an Oct4 activator which activates expression through the Oct4 gene promoter; enhances reprogramming efficiency by increasing the rate of production of induced pluripotent stem cells (iPSCs) from embryonic fibroblasts; an analog of OAC1.

SB 202190 hydrochloride is a selective and cell-permeable p38 MAPK inhibitor that inhibits p38α and p38β2 (IC50=50/100 nM). SB 202190 hydrochloride has anti-tumor activity and can also induce the differentiation of human embryonic stem cells into cardiomyocytes.

Mt KARI-IN-4 (compound 5c) is a highly effective inhibitor of Mycobacterium tuberculosis ketol-acid reductoisomerase (Mtb KARI), demonstrating a Ki value of 5.48 μM. Additionally, Mt KARI-IN-4 displays inhibitory properties against Mtb H37Rv, with a minimum inhibitory concentration (MIC) of 0.78 μM. Importantly, this compound exhibits low levels of cytotoxicity, as evident from its half-maximal inhibitory concentration (IC 50 ) value of over 72 μg/mL against human embryonic kidney cells (HEK) [1].

Nicotinic acid adenine dinucleotide phosphate (NAADP) is a secondary messenger that induces calcium mobilization. It induces calcium release from endosomes and lysosomes via two-pore channel 2 (TPC2) and TPC1, which then stimulates large-scale calcium release from granules and the endoplasmic reticulum mediated by type 1 ryanodine receptors (RyR2s), RyR3s, and inositol-(1,4,5)-triphosphate receptors (IP3Rs). NAADP induces calcium mobilization in sea urchin and starfish eggs post fertilization to block polyspermy and activate embryogenesis. NAADP-induced calcium mobilization induces VEGF-mediated angiogenesis in human umbilical vein endothelial cells (HUVECs). It also alkalizes lysosomal pH thereby inhibiting fusion between autophagosomes and lysosomes and arresting autophagic flux in mouse embryonic stem cells.

MELK-8a (NVS-MELK8a) is a potent and selective inhibitor of maternal embryonic leucine elongation kinase (MELK) (IC50: 2 nM). 0.42 μM). Among them, MELK plays an important role in regulating mitosis in cancer cells.

TAT-SAMβA, an RNAENFDRF (SAMβA) peptide conjugated to the TAT 47–57 protein-derived cell-penetrating peptide, acts as a selective antagonist of the Mfn1-βIIPKC association. It has been shown to protect mouse embryonic fibroblast cells (MEFs) from cytotoxicity induced by oxidative stress [1].

C6 urea ceramide is an inhibitor of neutral ceramidase.1 It increases total ceramide levels in wild-type mouse embryonic fibroblasts (MEFs) and in HT-29 colon cancer cells but not in MEFs lacking neutral ceramidase. It inhibits proliferation of, and induces apoptosis and autophagy in HT-29, but not non-cancerous RIE-1, cells when used at concentrations of 5 and 10 μM. C6 urea ceramide decreases total β-catenin, increases phosphorylated β-catenin, and induces colocalization of β-catenin with the 20S proteasome in HT-29 and HCT116, but not RIE-1, cells. It reduces tumor growth and increases C16, C18, C20, and C24 ceramide levels in tumor tissue in an HT-29 mouse xenograft model when administered at doses of 1.25, 2.5, and 5 mg/kg for five days. |1. García-Barros, M., Coant, N., Kawamori, T., et al. Role of neutral ceramidase in colon cancer. FASEB J. 30(12), 4159-4171 (2016).

Thymopentin acetate, primarily secreted by the epithelial cells of the thymic cortex and medulla, serves as an effective immunomodulatory agent. It possesses a short plasma half-life of 30 seconds and significantly enhances the generation of T-cell lineage from human embryonic stem cells (hESCs) [1] [2].

ELA-32(human) TFA is a potent apelin receptor agonist with high affinity, demonstrating an IC50 of 0.27 nM and a Kd of 0.51 nM. This compound does not bind to GPR15 or GPR25. It activates the PI3K/AKT signaling pathway, facilitating self-renewal of human embryonic stem cells (hESCs) through cell-cycle progression and protein synthesis. Additionally, ELA-32(human) TFA enhances the TGFβ pathway, predisposing hESCs towards an endoderm lineage, and promotes angiogenesis in HUVEC cells.

Oxocarbazate, also known as CID23631927, is an inhibitor of human cathepsin L. In the cathepsin L inhibition assay, The oxocarbazate caused a time-dependent 17-fold drop in IC50 from 6.9 nM (no preincubation) to 0.4 nM (4-h preincubation). Slowly reversible inhibition was demonstrated in a dilution assay. CID23631927 demonstrate activity in blocking both SARS-CoV (IC50 = 273 nM) and Ebola virus (IC50 = 193 nM) entry into human embryonic. CID 23631927 was a subnanomolar, slow-binding, reversible inhibitor of human cathepsin L that blocked SARS-CoV and Ebola pseudotype virus entry in human cells. Inhibition of cathepsin L thus holds promise for therapeutic intervention for both SARS-CoV and Ebola virus infection.

The A1, A2A, A2B, and A3 adenosine receptors (ARs) are ubiquitous G protein-coupled receptors. The four AR subtypes have been implicated in several areas of therapeutic interest such as stroke and other ischemic conditions, as well as inflammation, neurodegenerative diseases, diabetes, and sleep regulation. A3 AR antagonists are of interest as therapeutic agents in glaucoma agents and inflammation. CAY10498 is a potent and selective A3 AR antagonist exhibiting a Ki of 37 nM with 60 and 200-fold selectivity over A1 and A2A adenosine receptors, respectively. CAY10498 is also a structural analog of reversine, a dedifferentiation agent of embryonic progenitor cells. However, no dedifferentiation effects or any connection between A3 AR antagonism and dedifferentiation have been demonstrated.

Cardiogenol C is a cardiomyogenesis inducer in embryonic stem cells.

2-O-methyl PAF C-16 is a synthetic analog of platelet-activating factor (PAF) featuring a methyl group attached via an ether linkage at the sn-2 position. While the specific biological activities of 2-O-methyl PAF C-16 remain undercharacterized, studies with its C-18 counterpart have demonstrated its ability to modulate various biological processes. These processes include reducing plasma membrane fluidity and hindering the invasiveness of tumor cells in embryonic chick hearts. Furthermore, in rat astrocytes, the C-18 analog prompts the release of significant amounts of nitric oxide (NO) through a mechanism that involves the activation of nitric oxide synthase (NOS).

Oct3/4-inducer-1 (2-(4-(4-methoxybenzyloxy)phenyl)acetonitrile) is an OCT3/4 inducer that promotes the expression and stabilization of OCT3/4 and enhances its transcriptional activity in a variety of human cells.

Ganglioside GQ1b is a tetrasialoganglioside that contains two sialic acid residues linked to an inner galactose unit. It stimulates phosphorylation of several ecto-type protein kinase substrates on the surface of GOTO human neuroblastoma cells when used at a concentration of 5 nM. Ganglioside GQ1b promotes differentiation of murine embryonic stem cells (mESCs) to neuronal precursor and glial cells via activation of the ERK1/2 pathway. It also induces differentiation of murine keratinocytes through phosphoinositide turnover. Ganglioside GQ1b mixture contains ganglioside GQ1b molecular species with C18:1 and C20:1 sphingoid backbones.

MEDS433 is a dihydroorotate dehydrogenase inhibitor (IC50 1.2 nM). MEDS433 inhibited the in vitro replication of hCoV-OC43 and hCoV-229E, as well as of SARS-CoV-2, at low nanomolar range. Notably, the anti-SARS-CoV-2 activity of MEDS433 against SARS-CoV-2 was also observed in kidney organoids generated from human embryonic stem cells.

HG-10-102-01 is an inhibitor of leucine-rich repeat kinase 2 (LRRK2, IC50 of 20.3 nM).