Valnemulin HCl

For research use only.

Catalog No.S4216

Valnemulin HCl Chemical Structure

CAS No. 133868-46-9

Valnemulin HCl is a broad-spectrum bacteriostatic agent inhibiting protein synthesis in bacteria by binding to the peptidyl transferase component of the 50S subunit of ribosomes.

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Biological Activity

Description Valnemulin HCl is a broad-spectrum bacteriostatic agent inhibiting protein synthesis in bacteria by binding to the peptidyl transferase component of the 50S subunit of ribosomes.
peptidyl transferase [1]
In vitro

Valnemulin (20 μM) completely inhibits the peptidyl transferase reaction, thus inhibits peptide bond formation. Valnemulin enhances the reactivity of nucleotides A2058 and A2059 moderately, whereas they protect U2506 strongly. [1] Valnemulin shows exceptional activity against M hyopneumoniae (MIC90 0.5 μg/mL) and M hyosynoviae (MIC range 0.1-0.25 0.5 μg/mL) field strains. [2] Valnemulin is mainly active against Gram-positive bacteria with moderate activity against some fastidious Gram-negative bacilli (e.g., anaerobic bacteria) and Mycoplasma and is used almost exclusively in animals, largely in swine in China. [3]

In vivo Valnemulin is absorbed rapidly, distributed widely and rapidly and excreted rapidly after oral administration to rats. [3] Valnemulin results in a rapid diminution of clinical signs, restoration of appetite and reversal of weight loss in young calves. Valnemulin results in a more rapid reduction of clinical scores and eliminated M. bovis from the lungs more effectively than Enrofloxacin. [4] Valnemulin significantly decreases the wet-to-dry weight (W/D) ratios of lungs, protein concentrations, and the number of total cells, neutrophils, macrophages, and leukomonocytes, and histologic analysis indicates that valnemulin significantly attenuates tissue injury. Valnemulin significantly increases LPS-induced SOD activity in BALF and decreases lung myeloperoxidase (MPO) activity activity as well. Valnemulin also inhibits the production of tumor necrosis factor-alpha, interleukin-6, and interleukin-1beta, which is consistent with mRNA expression in lung. [5]


Solubility (25°C)

In vitro DMSO 100 mg/mL (166.31 mM)
Water 100 mg/mL (166.31 mM)
Ethanol '100 mg/mL

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Chemical Information

Molecular Weight 601.28


CAS No. 133868-46-9
Storage powder
in solvent
Synonyms N/A
Smiles CC1CCC23CCC(=O)C2C1(C(CC(C(C3C)O)(C)C=C)OC(=O)CSC(C)(C)CNC(=O)C(C(C)C)N)C.Cl

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID