Prostratin, PKC activator

Description

Activation of latent reservoirs of HIV-infected cells is a treatment strategy designed to reduce viral load and eliminate the perpetuation of retroviral infection. Prostratin is a non-tumor promoting phorbol ester that potently induces HIV-1 reactivation in latent reservoirs of infected Jurkat-LAT-GFP cells with an IC₅₀ value of ~0.5 μM. Originally, prostratin was isolated from plant sources including P. prostrata, E. cornigera, and H. nutans. The effects of prostratin are mediated through activation of NF-κB via protein kinase C and by downregulation of HIV-1 receptor CD4 expression and its co-receptors CXCR4 and CCR5.

The Uses of Prostratin, PKC activator

It is a protein kinase C activator found in the bark of the mamala tree of Samoa, Homalanthus nutans (Euphorbiaceae). Research indicated that prostratin has potential to be useful in the treatment of HIV as it flushes viral reservoirs in latently infected CD4+ T-cells.

The Uses of Prostratin, PKC activator

Activation of latent reservoirs of HIV-infected cells is a treatment strategy designed to reduce viral load and eliminate the perpetuation of retroviral infection. Prostratin is a non-tumor promoting phorbol ester that potently induces HIV-1 reactivation in latent reservoirs of infected Jurkat-LAT-GFP cells . [Cayman Chemical]

What are the applications of Application

Prostratin is a PKC (Protein Kinase C) activator and potential HIV infection inhibitor that does not induce tumor formation.

Definition

ChEBI: A natural product found in Euphorbia fischeriana.

Biochem/physiol Actions

Prostratin, an unusual non-tumorigenic phorbol ester, is an activator of protein kinase C (PKC) and also an activator of nuclear factor KB (NF-KB) mediated through activation of the IKKs (IKB kinases). Prostratin exhibits potent in vitro activity by inducing HIV expression in latently infected cell lines and primary cells, thus antagonizing HIV latency. Activation of PKC and NF-kB has been proposed as the mechanism of action. Prostratin also inhibits HIV entry into target cells by down-regulating CD4 and CXCR4 receptors.

References

1) Cashmore et al. (1976), The structure of prostratin: a toxic tetracyclic diterpene ester from Pimelea Prostrata; Tetrahedron Lett., 17 1737 2) Miana et al. (2015), Prostratin: An Overview; Mini Rev. Med. Chem., 15 1122 3) Shen et al. (2015), The protein kinase C agonist prostratin induces differentiation of human myeloid leukemia cells and enhances cellular differentiation by chemotherapeutic agents; Cancer Lett., 356 (2 Pt. B) 686 4) Biancotto et al. (2004), Dual role of prostratin in inhibition of infection and reactivation of human immunodeficiency virus from latency in primary blood lymphocytes and lymphoid tissue; J. Virol., 78 10507 5) Geribaldi-Doldan et al. (2015), 12-Deoxyphorbols Promote Adult Neurogenesis by Inducing Neural Progenitor Cell Proliferation via PKC activation ; Int. J, Neuropsychopharmacol., 19 pyv085