Description
Pomalidomide inhibits LPS-induced TNF-α release with IC50 of 13 nM in PBMCs.
In vitro
Pomalidomide inhibits lipopolysaccharide (LPS) stimulated TNF-alpha release in human PBMC and in human whole blood with IC50 values of 13 nM and 25 nM, respectively. Pomalidomide inhibits the growth of T regulatory cells which is stimulated by IL-2 with an IC50 of ~1 μM. Treatment with Pomalidomide (6.4 nM-10 μM) increases the production of IL-2 in human peripheral blood T cells, and is slightly more potent in the CD4+ subset than in the CD8+ subset. Pomalidomide is significantly more potent than CC-5013 at elevating IL-2, IL-5, and IL-10 levels, but only slightly more potent than CC-5013 at elevating IFN-γ levels.
Pomalidomide enhances SEE and Raji cells induced AP-1 transcriptional activity in Jurkat cells in a dose-dependent manner, with a maximal enhancement of 4-fold at 1 μM. Exposure of Raji cells to various concentrations of Pomalidomide (2.5-40 μg/mL) for 48 hours leads to a significant decrease in cell proliferation and DNA synthesis. There is a reduction of ~40% compared to vehicle-treated controls.
In vivo
Pomalidomide enhances the antitumor effect of rituximab against B-cell lymphomas in severe combined immunodeficient mice. Administration of Pomalidomide in combination with rituximab, gives the mice a median survival period of 74 days compared with 58 days of CC5013/rituximab treatment and 45 days of rituximab nonotherapy. The synergistic effect of Pomalidomide and rituximab can be completely abrogated by depletion of NK cells, supporting the proposal that NK cell expansion is one mechanism by which Pomalidomide may augment rituximab antitumor activity.
Description
In February 2013, the US FDA approved pomalidomide (also known as CC4047) for the treatment of multiple myeloma (MM) in patients with disease progression after receiving other cancer therapeutics. Pomalidomide is a 4-amino analog of thalidomide with enhanced potency and an improved toxicity profile. Pomalidomide and thalidomide exert their effects by modulation of immunity, inhibition of angiogenesis, interference with the bone/tumor microenvironment, and inhibition of the cereblon protein. Pomalidomide potently inhibited in vitro proliferation in a variety of human MM cell lines, IC
50～10 nM, while thalidomide showed almost no inhibition up to 100 μM. In mouse MM tumor models, 50 mg/kg daily doses of pomalidomide resulted in marked inhibition of tumor growth after 15 days of treatment and complete regression in 3–6 weeks versus thalidomide-treated controls at the same dose. Pomalidomide is prepared by condensation of 4-nitrophthalic anhydride with 3-aminopiperidine-2,6-dione followed by catalytic hydrogenation of the nitro group.
Chemical Properties
Yellow Solid
Originator
Celgene Corporation (United States)
Uses
Pomalidomide is a second generation immunomodulator, TNF-α inhibitor, and thalidomide analog. An inhibitor of LPS-induced TNFαrelease.
Uses
Pomalidomide is a thalidomide derivative, a potent inhibitor of TNF-α production. It is an antiinflammatory and antitumor agent used in the treatment of multiple myeloma.
Uses
Pomalidomide inhibits LPS-induced TNF-α release with IC50 of 13 nM
Definition
ChEBI: An aromatic amine that is thalidomide substituted at position 4 on the isoindole ring system by an amino group. Used for the treatment of multiple myeloma in patients who failed to respond to previous therapies.
Biochem/physiol Actions
Pomalidomide is an effective fetal hemoglobin (HbF) inducer that downregulates the key γ-globin repressors, SRY-box transcription factor 6 (SOX6), and BAF chromatin remodeling complex subunit (BCL11A).
Clinical Use
Treatment of multiple myeloma
Synthesis
First, condensation of commercially available 3-nitrophthalic
anhydride (133) and L-glutamine in warm DMF gave nitrophthalimide
134. Although the authors from Celgene do not
explicitly describe the racemization of the stereocenter derived
from L-glutamine, scrambling of the stereocenter has been
reported during this step under neutral conditions at elevated
temperatures. Next, hydrogenative reduction of the nitro group
furnished the anilinophthalimide 135, and this was followed by
treatment with CDI in refluxing acetonitrile to secure the piperidone
dione and ultimately furnish pomalidomide (XVIII) as the
racemate in 87% overall yield from 134.
Drug interactions
Potentially hazardous interactions with other drugs
Antidepressants: concentration increased by
fluvoxamine.
Metabolism
Mainly metabolised in the liver by the cytochrome P450
isoenzymes CYP1A2 and CYP3A4, with CYP2C19 and
CYP2D6 playing a minor role.
Following a single oral administration of
[14C]-pomalidomide (2 mg) to healthy subjects,
approximately 73% and 15% of the radioactive dose
was eliminated in urine and faeces, respectively, with
approximately 2% and 8% of the dosed radiocarbon
eliminated as pomalidomide in urine and faeces.
References
1) Lopez-Girona?et al.?(2012),?Cereblon is direct protein target for immunomodulatory and antiproliferative activities of lenalidomide and pomalidomide; Leukemia,?26?2326
2) Zhu?et al.?(2013),?Molecular mechanism of action of immune-modulatory drugs thalidomide, lenalidomide and pomalidomide in multiple myeloma; Leukemia Lymphoma,?54?683
3) Donovan?et al.?(2018),?Thalidomide promotes degradation of SALL4, a transcription factor implicated in Duane Radial Ray syndrome; Elife,?7?e38430
4) Winter?et al.?(2015),?DRUG DEVELOPMENT. Phthalimide conjunction as a strategy for in vivo target protein degradation; Science,?348?1376
5) Lohbeck and Miller (2016),?Practical synthesis of a phthalimide-based Cereblon ligand to enable PROTAC development; Bioorg. Med. Chem. Lett.,?26?5260
