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Item № 15435
CAS № 1628759-75-0
Purity ≥98%
product image
                (CAS 1628759-75-0)
     100 µg $45.00 0.00
     500 µg $86.00 0.00
     1 mg $135.00 0.00

Pricing updated 2019-06-16. Prices are subject to change without notice.


The prostaglandin E receptor 4 (EP4) is one of four G protein-coupled receptors that mediate the actions of prostaglandin E2 (PGE2; Item No. 14010). Binding of PGE2 to the EP4 receptor causes an increase in intracellular cyclic AMP, which plays important roles in bone formation and resorption, cancer, and atherosclerosis.1,2,3,4 KMN-80 is a substituted γ-lactam (pyrrolidinone) derivative of PGE1 (Item No. 13010) that acts as a selective and potent agonist of EP4 with an IC50 value of 3 nM (IC50 = 1.4 μM for EP3 and > 10 μM for all other prostanoid receptors).5 In functional assays it has been shown to stimulate secreted alkaline phosphatase gene reporter activity in EP4-transfected HEK293 cells with an EC50 value of 0.19 nM, demonstrating >5,000 and 50,000-fold selectivity against EP2 and TP, respectively.5 KMN-80 can induce the differentiation of bone marrow stem cells from both young and aged rats into osteoblasts in vitro (EC50s = 20 and 153 nM, respectively) and exhibits favorable tolerability up to at least 10 μM, whereas the EP4 agonist L-902,688 (Item No. 10007712) is highly cytotoxic at similar concentrations in these cells.6 KMN-80 has been used to repair calvarial defects in an in vivo rat craniomaxillofacial reconstruction model (rate of reduction in defect size equivalent to BMP-2 treated rats) and to promote bone formation in a rat incisor tooth socket model.6

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Technical Information
Formal Name
7-((R)-2-((3S,4S,E)-3-hydroxy-4-methylnon-1-en-6-yn-1-yl)-5-oxopyrrolidin-1-yl)heptanoic acid
CAS Number
Molecular Formula
Formula Weight
A solution in ethanol
InChI Code
InChI Key

Warning - this product is not for human or veterinary use.

Shipping & Storage
Room temperature in continental US; may vary elsewhere
≥ 1 year
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Additional Information

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References & Product Citations
Product Description References

1. Li, M., Thompson, D.D., and Paralkar, V.M. Prostaglandin E2 receptors in bone formation International Orthopaedics 31, 767-772 (2007).

2. Hawcroft, G., Ko, C.W.S., and Hull, M.A. Prostaglandin E2-EP4 receptor signalling promotes tumorigenic behaviour of HT-29 human colorectal cancer cells Oncogene 26, 3006-3019 (2007).

3. Babaev, V.R., Chew, J.D., Ding, L., et al. Macrophage EP4 deficiency increases apoptosis and suppresses early atherosclerosis Cell Metabolism 8, 492-501 (2008).

4. Konya, V., Marsche, G., Schuligoi, R., et al. E-type prostanoid receptor 4 (EP4) in disease and therapy Pharmacology & Therapeutics 138(3), 485-502 (2013).

5. Barrett, S.D., Ciske, F.L., Endres, G.W., et al. Novel Potent Lactam Acetylene EP4 Agonists Stimulate Alkaline Phosphatase Production and Differentiation in Bone Marrow Cells (2014).

6. O'Malley, J., Uzieblo, A., Germain, B.D., et al. Development of a novel prostaglandin EP4 agonist which stimulates local bone formation in vivo (2014).

Product Citations

Barrett, S.D., Holt, M.C., Kramer, J.B., et al. Difluoromethylene at the γ-lactam α-position improves 11-deoxy-8-aza-PGE1 series EP4 receptor binding and activity: 11-deoxy-10,10-difluoro-8-aza-PGE1 analog (KMN-159) as a potent EP4 agonist J. Med. Chem. (2019).

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