Methapyrilene hydrochloride  (Synonyms: Thenylpyramine hydrochloride)

Methapyrilene (Thenylpyramine) hydrochloride is an orally active H1-receptor antihistamine and an anticholinergic agent of the pyridine chemical class. Methapyrilene hydrochloride has hepatotoxicity and can be used as a hepatotoxin that cause periportal hepatic necrosis in vivo^[2]

Methapyrilene hydrochloride (650 μM) results in a down-regulation of TF and up-regulation of FTL, while the level of HMOX1 is not changed. Additionally, the levels of CD44 and SOX9 proteins and the expression of PROM1 (CD133), hepatic stem cell-associated markers are increased^[1].
Methapyrilene hydrochloride (650 μM) decreases CYP2E1, CYP3A4, NR1l3, ALB, mRNA expression and increases CD133 expression^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Methapyrilene hydrochloride (oral gavage; 40 or 80 mg/kg; 5 days per week; 6 weeks) results in changes in the expression of classic hepatotoxicity-related marker genes and iron homeostasis-related genes, especially a prominent, dose-dependent down-regulation of the transferrin (Tf) gene and an up-regulation of the ferritin, light chain (FTL) gene in rats^[1].
Methapyrilene hydrochloride (oral gavage; 150 mg/kg; 3 days) causes periportal liver necrosis at high dosage. Methapyrilene is sufficient to induce liver necrosis, or a subtoxic dose of 50 mg/kg/day^[2].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

297.85

C₁₄H₂₀ClN₃S

135-23-9

Room temperature in continental US; may vary elsewhere.

Please store the product under the recommended conditions in the Certificate of Analysis.

• [1]. Iryna Kindrat, et al.Effect of methapyrilene hydrochloride on hepatic intracellular iron metabolism in vivo and in vitro. Toxicol Lett. 2017 Nov 5;281:65-73.  [Content Brief]

  [2]. Andrew Craig, et al. Systems toxicology: integrated genomic, proteomic and metabonomic analysis of methapyrilene induced hepatotoxicity in the rat. J Proteome Res. 2006 Jul;5(7):1586-601.  [Content Brief]

  [3]. Shawkat-Muhialdin Jangi, et al. H1 histamine receptor antagonists induce genotoxic and caspase-2-dependent apoptosis in human melanoma cells. Carcinogenesis. 2006 Sep;27(9):1787-96.  [Content Brief]