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Explore how neutrophils shape the immune response in health and disease. This poster highlights neutrophil pathogen defense mechanisms, including phagocytosis, degranulation, and NETosis, as well as neutrophil roles in inflammation and NET-associated pathologies.
DOWNLOAD NOW4,5-Dicaffeoylquinic acid (4,5-DCQA) is a polyphenol originally isolated from G. fagetorum and G. pseudomollugo that has diverse biological activities, including anti-HIV replication, antioxidative, anti-inflammatory, and anti-melanogenic properties.1,2,3,4,5 It inhibits HIV-1 integrase 3' end processing, 3’ end joining, and disintegration with IC50 values of 0.13, 0.24, and 0.3 μg/ml, respectively.3 It also inhibits HIV-1 replication in MT-2 T lymphoblastoid cells with an EC50 value of 2 μg/ml. 4,5-DCQA scavenges 2,2-diphenyl-1-picrylhydrazyl (DPPH; Item No. 14805) radicals in a cell-free assay (IC50 = 19.8 μM) and inhibits superoxide production in human neutrophils activated by N-formyl-Met-Leu-Phe (fMLF; Item No. 21495) and cytochalasin B (Item No. 11328; IC50 = 1.49 μM).2 It decreases prostaglandin E2 (PGE2; Item No. 14010) production in LPS-stimulated U937 cells when used at concentrations of 5 and 10 µg/ml but increases it when used at 200 µg/ml and increases production of TNF-α at concentrations ranging from 5 to 200 µg/ml.4 It inhibits the synthesis of MCP3 in U937 cells. 4,5-DCQA (25 µM) inhibits melanogenesis by 84% and decreases the levels of proteins involved in melanin biosynthesis, including tyrosinase, TRP-1, DCT, and MITF in B16F1 murine melanocytes.5
WARNING This product is not for human or veterinary use.
1. The hydroxycinnamic acids of Galium fagetorum and G. pseudomollugo. Chem. Nat. Compd. 6(6), 761-762 (1970).
2. Ilex kaushue and its bioactive component 3,5-
3. Dicaffeoylquinic acid inhibitors of human immunodeficiency virus integrase: Inhibition of the core catalytic domain of human immunodeficiency virus integrase. Mol. Pharmacol. 50(4), 846-855 (1996).
4. Effects of caffeoylquinic acid derivatives and C-
5. Mechanism underlying inhibitory effect of six dicaffeoylquinic acid isomers on melanogenesis and the computational molecular modeling studies. Bioorg. Med. Chem. 26(14), 4201-4208 (2018).