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PLX5622 hemifumarate

Catalog No. T12505 CAS T12505

PLX5622 hemifumarate is a highly selective brain penetrant and orally active CSF1R inhibitor with an IC 50 of 0.016 μM and Ki of 5.9 nM. PLX5622 hemifumarate allows for extended and specific microglial elimination, preceding and during pathology development. In vivo, PLX5622 hemifumarate demonstrates desirable PK properties in varies animals [1] [2].

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PLX5622 hemifumarate, CAS T12505

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200 mg	10-14 weeks	$ 1,168.00

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Biological Description

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Description	PLX5622 hemifumarate is a highly selective brain penetrant and orally active CSF1R inhibitor with an IC 50 of 0.016 μM and Ki of 5.9 nM. PLX5622 hemifumarate allows for extended and specific microglial elimination, preceding and during pathology development. In vivo, PLX5622 hemifumarate demonstrates desirable PK properties in varies animals [1] [2].
In vitro	PLX5622 (1-20 μM; 3 days) hemifumarate effectively depletes microglia while not affecting oligodendrocytes or astrocytes in cerebellar slices. PLX5622 (4 μM; 3 days) hemifumarate leads to a 30-40% reduction in NG2+ or PDGFRα+ cells, increasing to 90-95% at 20 μM. No reduction of NG2+ or PDGFRα+ OPCs is observed in slices exposed to 1 μM or 2 μM PLX5622 despite robust (~95%) depletion of the microglial cells [3].
In vivo	In preclinical studies, PLX5622 hemifumarate demonstrates significant microglial depletion in adult C57/Bl6 wild-type mice when administered at 1200 ppm in chow for durations of 3 days to 3 weeks, resulting in approximately 80% reduction after 3 days, and a 99% reduction after 3 weeks. Similar outcomes were observed in different brain regions including the cortex, striatum, cerebellum, and hippocampus when administered for 3 weeks. Intraperitoneal injections of 50 mg/kg in neonatal and adult rats for 14 days resulted in 80-90% microglia depletion within the first 3 days, surpassing 90% by day 7, and achieving more than 96% depletion by day 14, while astrocyte levels remained unchanged. Notably, neonates required only a single daily injection, while adults needed twice-daily injections for effective depletion. Furthermore, administration of PLX5622 in AIN-76A chow at 1200 mg/kg for 28 days significantly reduced microglia in the CNS of 14-month-old 5xfAD mice. The pharmacokinetic profile of PLX5622 across various species revealed differences in bioavailability, clearance, and half-life, notably demonstrating efficient absorption and clearance rates. For gavage dosing preparations, PLX5622 hemifumarate is dissolved in DMSO, mixed with a diluent consisting of hydroxypropyl methyl cellulose and Polysorbate 80, and sonicated to achieve a uniform suspension for administration.

Molecular Weight	453.45
Formula	C25H23F2N5O5
CAS No.	T12505

Storage

Powder: -20°C for 3 years | In solvent: -80°C for 1 year

Solubility Information

DMSO: 100 mg/mL (220.53 mM), Sonication is recommended.

References and Literature

1. Spangenberg E, et al. Sustained microglial depletion with CSF1R inhibitor impairs parenchymal plaque development in an Alzheimer's disease model. Nat Commun. 2019 Aug 21;10(1):3758. 2. Lee S, et al. Targeting macrophage and microglia activation with colony stimulating factor 1 receptor inhibitor is an effective strategy to treat injury-triggered neuropathic pain. Mol Pain. 2018 Jan-Dec;14:1744806918764979.

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Keywords

PLX5622 hemifumarate T12505 Tyrosine Kinase/Adaptors c-Fms PLX-5622 Hemifumarate PLX 5622 PLX-5622 PLX5622 PLX 5622 Hemifumarate PLX5622 Hemifumarate PLX-5622 hemifumarate inhibitor inhibit

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