A8239-5mg | CA-074 Me [147859-80-1] Clinisciences

CA-074 Me is a membrane-permeable and selective inhibitor of cathepsin B with IC50 value of 36.3 nM [1, 2].

CA-074 Me is a methyl ester derivative of CA-074. In cultured human gingival fibroblasts, CA-074 Me exerted a 95% inhibition of cathepsin B and partial inhibition (54%) of the combined activities of cathepsins B and L. CA-074 Me was also found to inhibit cathespin L under reducing conditions. It inhibited the activity of purified human cathepsin L by more than 90% when the enzyme had been pre-incubated with 1.4 mM DTT or 4.2 mM GSH for 2 hours. Besides that, CA-074 Me completely inhibited cathepsin B in the presence of 1.4 mM DTT [2, 3].

References:
[1] Wu X, Zhang L, Gurley E, et al. Prevention of free fatty acid–induced hepatic lipotoxicity by 18β-glycyrrhetinic acid through lysosomal and mitochondrial pathways. Hepatology, 2008, 47(6): 1905-1915.
[2] Steverding D. The cathepsin B-selective inhibitors CA-074 and CA-074Me inactivate cathepsin L under reducing conditions. Open Enzyme Inhibition Journal, 2011, 4: 11-16.
[3] Buttle D J, Murata M, Knight C G, et al. CA074 methyl ester: a proinhibitor for intracellular cathepsin B. Archives of biochemistry and biophysics, 1992, 299(2): 377-380.

1. Shuzhen Liu, Preston Perez, et al. "MLKL polymerization-induced lysosomal membrane permeabilization promotes necroptosis." Cell Death Differ. 2023 Nov 23. PMID: 37996483
2. Jianhua Wang, Lichun Wang, et al. "Cathepsin B aggravates acute pancreatitis by activating the NLRP3 inflammasome and promoting the caspase-1-induced pyroptosis." Int Immunopharmacol. 2021 May;94:107496. PMID:33639565
3. Zhi X, Zhang Y, et al. "NLRP3 inflammasome activation by Foot-and-mouth disease virus infection mainly induced by viral RNA and non-structural protein 2B." RNA Biol. 2020;17(3):335–349. PMID:31840571
4. Zhou H, Du R, et al. "Cannabinoid receptor 2 promotes the intracellular degradation of HMGB1 via the autophagy-lysosome pathway in macrophage." Int Immunopharmacol. 2020;78:106007. PMID:31806570
5. Chen CH, Bhasin S, et al. "Study of Cathepsin B inhibition in VEGFR TKI treated human renal cell carcinoma xenografts." Oncogenesis. 2019 Feb 22;8(3):15. PMID:30796200
6. Xu Z, Zhang Y, et al. "Novel half-sandwich iridium OˆC (carbene)-Complexes: In vitro and in vivo tumor growth suppression and pro-apoptosis via ROS-mediated cross-talk between mitochondria and lysosomes." Cancer Lett. 2019 Apr 10;447:75-85. PMID:30673591
7. Yan X, Li F, et al. "Interleukin-1beta released by microglia initiates the enhanced glutamatergic activity in the spinal dorsal horn during paclitaxel-associated acute pain syndrome." Glia. 2018 Dec 21. PMID:30578561
8. Gonzalez EA, Martins GR, et al. "Cathepsin B inhibition attenuates cardiovascular pathology in mucopolysaccharidosis I mice." Life Sci. 2018 Mar 1;196:102-109. PMID:29366749
9. Shao G, Wang R, et al. "The E3 ubiquitin ligase NEDD4 mediates cell migration signaling of EGFR in lung cancer cells." Mol Cancer. 2018 Feb 19;17(1):24. PMID:29455656
10. Clerc P, Jeanjean P, et al. "Targeted Magnetic Intra-Lysosomal Hyperthermia produces lysosomal reactive oxygen species and causes Caspase-1 dependent cell death." J Control Release. 2017 Dec 1;270:120-134. PMID:29203413

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Physical Appearance	A solid
Storage	Store at -20°C
M.Wt	397.5
Cas No.	147859-80-1
Formula	C₁₉H₃₁N₃O₆
Solubility	insoluble in H2O; ≥19.88 mg/mL in DMSO; ≥51.5 mg/mL in EtOH with ultrasonic
Chemical Name	methyl (2S)-1-[(2S)-3-methyl-2-[[(2S,3S)-3-(propylcarbamoyl)oxirane-2-carbonyl]amino]pentanoyl]pyrrolidine-2-carboxylate
SDF	Download SDF
Canonical SMILES	CCCNC(=O)C1C(O1)C(=O)NC(C(C)CC)C(=O)N2CCCC2C(=O)OC
Shipping Condition	Small Molecules with Blue Ice, Modified Nucleotides with Dry Ice.
General tips	We do not recommend long-term storage for the solution, please use it up soon.

Cell experiment: [1]
Cell lines	McNtcp.24 cells
Preparation method	The solubility of this compound in DMSO is >10 mM. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while.Stock solution can be stored below -20°C for several months.
Reaction Conditions	0.1 µM, 2 hours
Applications	Cells were incubated in medium alone or with 50 µM GCDC in the absence or presence of 0.1 µM CA-074 Me. Apoptosis was quantitated after 2 h of incubation. The cathepsin B inhibitor CA-074 Me reduced the GCDC-mediated increase in cathepsin B activity and apoptosis in McNtcp.24 cells. The result confirms that cathepsin B activity increases and contributes to bile salt–mediated apoptosis in primary rat hepatocytes.
Animal experiment: [2]
Animal models	CatB+/+ mice
Dosage form	Intraperitoneal injection, 4 mg/100g
Applications	Serum ALT levels after TNF-α-treatment were significantly reduced in catB+/+ mice pretreated with CA-074 Me compared to saline-injected controls. In contrast, liver architecture was preserved and only moderate damage was observed in catB+/+ mice pretreated with CA-074 Me. These results suggest that pharmacological inhibition of cat B may partially attenuate TNF-α-induced liver damage.
Other notes	Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.
References: [1] Faubion W A, Guicciardi M E, Miyoshi H, et al. Toxic bile salts induce rodent hepatocyte apoptosis via direct activation of Fas. The Journal of clinical investigation, 1999, 103(1): 137-145. [2] Guicciardi M E, Miyoshi H, Bronk S F, et al. Cathepsin B knockout mice are resistant to tumor necrosis factor-α-mediated hepatocyte apoptosis and liver injury: implications for therapeutic applications. The American journal of pathology, 2001, 159(6): 2045-2054.