diABZI STING agonist-1 (Tautomerism) (diABZI STING agonist (Compound 3)) is a selective stimulator of interferon genes (STING) receptor agonist, with EC50s of 130, 186 nM for human and mouse, respectively.

Lenacapavir (GS-6207) is a potent capsid-targeting inhibitor of HIV replication. Lenacapavir shows anti-HIV activity with an EC50 of 100 pM in MT-4 cells.

Rademikibart (CBP-201) is a human monoclonal antibody selective for IL-4Rα, exhibiting strong affinity with a KD of 20.7 pM for human IL-4Rα epitopes, without cross-reactivity to IL-4Rα from other species. It effectively inhibits IL-4 and IL-13-induced STAT6 signaling, TF-1 cell proliferation, and TARC production in PBMCs, showing promise for investigating moderate-to-severe Th2 inflammatory diseases [1].

Ganglioside GT1b is a trisialoganglioside that is characterized by having two sialic residues linked to the inner galactose unit. It binds to the neurotoxins botulinum toxin serotype A (BTxA), BTxA heavy chain, and tetanus toxin with IC50 values of 11, 0.74, and 7.2 μM, respectively.[1] Ganglioside GT1b-containing liposomes bind to the major coat protein VP1 from Merkel cell polyomavirus (MCPyV), which has been identified in Merkel cell carcinomas, identifying ganglioside GT1b as a putative MCPyV receptor. [2] Ganglioside GT1b decreases production of IL-6, IL-10, IgG, IgM, and IgA in human peripheral blood mononuclear cells (PBMCs) by 31.4, 30.5, 60, 59.5, and 58%, respectively, when used at a concentration of 10 μM [3] . Ganglioside GT1b mixture contains ganglioside GT1b molecular species with C18:1 and C20:1 sphingoid backbones.

O-Demethyl apremilast is an active metabolite of the phosphodiesterase 4 (PDE4) inhibitor apremilast .1It inhibits the activity of PDE4 isolated from U937 cells and LPS-induced TNF-α production in isolated human peripheral blood mononuclear cells (PBMCs; IC50s = 8.3 and 5.6 μM, respectively). O-Demethyl apremilast is also an oxidative degradation product of apremilast.2,3 1.Hoffmann, M., Kumar, G., Schafer, P., et al.Disposition, metabolism and mass balance of [14C]apremilast following oral administrationXenobiotica41(12)1063-1075(2011) 2.Lu, Y., Shen, X., Hang, T., et al.Identification and characterization of process-related substances and degradation products in apremilast: Process optimization and degradation pathway elucidationJ. Pharm. Biomed. Anal.14170-78(2017) 3.Bhole, R.P., Naksakhare, S.R., and Bonde, C.G.A stability indicating HPTLC method for apremilast and identification of degradation products using MS/MSJ. Pharm. Sci. & Res.11(5)1861-1869(2019)

Compound A, a potent TLR8 agonist, exhibits an EC50 of 0.052 µM and promotes the production of IL-12p40 in human PBMCs with an EC50 of 0.031 µM. This compound is applicable for research in virus resistance, infection resistance, autoimmunity, and tumor studies [1].

M199, a novel inhibitor of TLR3/9 activation, induces secretion of IL-6, IL-8 and TNFalpha in human PBMCs.

ML604440 is a cell permeable proteasome β1i (LMP2) subunit inhibitor.

Tenofovir exalidex (CMX 157) is a lipid-conjugated acyclic nucleotide analog of Tenofovir, demonstrating efficacy against wild-type and antiretroviral-resistant HIV strains, including those resistant to multiple nucleoside/nucleotide analogs. It effectively inhibits all major HIV-1 and HIV-2 subtypes in fresh human PBMCs, as well as all evaluated HIV-1 strains in monocyte-derived macrophages, displaying EC50 values between 0.2 and 7.2 nM. Oral administration of CMX157 shows no apparent toxicity. Additionally, Tenofovir exalidex exhibits antiviral properties against HBV.

Pomalidomide (CC-4047) inhibits TNF-α release in LPS stimulated human PBMCs (IC50: 13 nM). It is an anti-angiogenic agent and an immunomodulator.

d2T, a nucleoside analog of thymidine, exhibits antiviral activity by inhibiting HIV replication in infected human peripheral blood mononuclear cells (PBMCs; EC50 = 0.17 µM). Additionally, 3′-deoxy Thymidine at concentrations of 1, 3, 10, or 30 µM significantly decreases viral plaque formation in CV-1 cells infected with herpes simplex virus 1 (HSV-1).

M04 acts as a stimulator of interferon genes (STING) agonist, effectively inducing IFN reporter gene expression in HEK293T cells equipped with wild-type human STING. Its activity is specific, not affecting HEK293T cells with the R71H-G230A-R293Q (HAQ) human STING variant or mouse RAW 264.7 cells, showcasing allelic- and species-dependent effects at a concentration of 75 µM. This compound also stimulates the production of TNF-α, IL-10, IL-1β, and IL-12p70 in human peripheral blood mononuclear cells (PBMCs). At 50 µM, M04 enhances human monocyte-derived dendritic cells' expression of HLA-DR (MHC class II receptor) and co-stimulatory molecules CD40, CD80, and CD86, improving T cell cross-priming in an ex vivo assay.

(+)-Norglaucine shows cytotoxic activity toward the tumor cell lines B16-F10 (mouse melanoma), HepG2 (human hepatocellular carcinoma), K562 (human chronic myelocytic leukemia) and HL-60 (human promyelocytic leukemia) and non-tumor peripheral blood mononuc

Gardiquimod is a TLR7/8 agonist. When used at concentrations below 10 μM, Gardiquimod specifically activates TLR7. Gardiquimod could inhibit HIV-1 infection of macrophages and activated peripheral blood mononuclear cells.

INX-SM-6, a chemical compound, serves as a targeted delivery vehicle for anti-inflammatory agents and has shown efficacy in suppressing LPS-induced IL-1β production in human PBMCs [1].

ODN D-SL03, a class C CpG oligonucleotide, effectively stimulates peripheral blood mononuclear cells (PBMCs) to produce high levels of IFN-α. It activates human B cells, NK cells, and mononuclear cells, elevating the expression of CD80, CD86, and HLA-DR on PBMC subsets' surface. Additionally, ODN D-SL03 impedes tumor growth. Its sequence: 5'-tcgcgaacgttcgccgcgttcgaacgcgg-3' [1].

Cathelicidin-2 (CATH-2) (128-153) is a synthetic antimicrobial peptide derived from amino acids 128-153 of chicken CATH-2, demonstrating activity against pathogens such as E. coli, S. aureus, S. enteritidis, and B. globigii in a dose-dependent manner. At a concentration of 40 µM, it induces hemolysis in chicken erythrocytes without exhibiting cytotoxicity towards human peripheral blood mononuclear cells (PBMCs). Additionally, it stimulates the production of the chemokine CCL2 and suppresses LPS-induced secretion of TNF-α, IL-6, IL-8, and IL-10 in human PBMCs.

EGFRvIII peptide, a synthetic peptide mirroring the EGFRvIII fusion junction—a tumor-specific, perpetually active EGFR variant missing amino acids 6-273 of the wild-type—binds to HLA-A*0201-positive T2 cells under MHC class I at 25 µg/ml. It enables antigen presentation in dendritic cells from human peripheral blood mononuclear cells (PBMCs), thus activating CD8+ cytotoxic T lymphocytes and prompting IFN-γ production. Administered at 15 µg/animal with the TLR5 agonist flagellin B, EGFRvIII peptide elevates CD8+ T cell numbers, lowers regulatory T cells (Tregs) in the brain, diminishes tumor volume, and extends survival in a GL261 glioblastoma mouse model.

CC-90005 is a potent, selective and orally active inhibitor of protein kinase C-θ (PKC-θ), with an IC50 of 8 nM. CC-90005 shows selectivity for PKC-θ over PKC-δ (IC50=4440 nM). CC-90005 can inhibit T cell activation by IL-2 expression[1]. CC-90005 shows the exquisite selectivity of CC-90005, with IC50s for all other family members of >3 μM[1].CC-90005 is a moderate inhibitor of both CYP2C9 (IC50=8 μM) and CYP2C19 (IC50=5.9 μM) in human liver microsomes[1].CC-90005 inhibits IL-2 expression in LRS_WBC human PBMCs, with an IC50 of 0.15 μM[1].CC-90005 (1-10 μM; 24 h) inhibits T cell proliferation in PBMCs by 51% at 1 μM and 88% at 3 μM[1]. CC-90005 (3-30 mg/kg; p.o. twice daily for 4 days) significantly reduces the popliteal lymph node (PLN) size in a model of chronic T cell activation[1].CC-90005 (100 mg/kg; a single p.o.) significantly inhibits plasma and spleen IL-2 release by 51 and 54%, respectively[1].CC-90005 exhibits reasonable oral bioavailability (66 and 46%) and Cmax (1.18 and 1.2 μM) following oral administration (10 and 3 mg/kg) in rat and dog, respectively[1].CC-90005 exhibits the mean residence time (0.52 and 2.0 h), CL (69.1 and 20.5 mL/min/kg) and Vss (2.11 and 2.44 L/kg) following intravenous administration (2 and 1 mg/kg) in rat and dog, respectively[1]. [1]. Papa P, et, al. Discovery of the Selective Protein Kinase C-θ Kinase Inhibitor, CC-90005. J Med Chem. 2021 Aug 26;64(16):11886-11903.

HOXB7 (8-25), a peptide fragment derived from homeobox B7 (HOXB7)—a key controller of cell growth and oncogene activator—facilitates antigen presentation when pulsed onto dendritic cells obtained from human peripheral blood mononuclear cells (PBMCs). This process promotes the activation and interferon-gamma (IFN-γ) production by CD4+ helper T cells, triggering targeted and broad-spectrum antitumor responses.

CK176 is a capsid targeted inhibitor of HIV-1 replication. CK176 shows an 11-fold improvement over I-XW-053 in blocking HIV-1 replication in primary human peripheral blood mononuclear cells (PBMCs).

SMU127 is an agonist of the toll-like receptor 1/2 (TLR1/2) heterodimer.1It induces NF-κB signaling in cells expressing human TLR2 (EC50= 0.55 μM) but not cells expressing human TLR3, -4, -5, -7, or -8 when used at concentrations ranging from 0.1 to 100 μM. SMU127 induces the production of TNF-α in isolated human peripheral blood mononuclear cells (PBMCs) when used at concentrations ranging from 0.01 to 1 μM.In vivo, SMU127 (0.1 mg/animal) reduces tumor volume in a 4T1 murine mammary carcinoma model. 1.Chen, Z., Cen, X., Yang, J., et al.Structure-based discovery of a specific TLR1-TLR2 small molecule agonist from the ZINC drug library databaseChem. Commun. (Camb.)54(81)11411-11414(2018)

(S)-Pomalidomide is an inhibitor of angiogenesis and growth of B-cell neoplasias, which induces complete regressions of Burkitt's lymphoma cell tumors.