Synthesis, toxicity study and anti-inflammatory effect of MHTP, a new tetrahydroisoquinoline alkaloid

Autor:	Hermann Ferreira Costa, Marcia Regina Piuvezam, Manuela Barbosa Cordeiro, Ana Luisa de Araujo Lima, Laércia Karla Liege Paiva Ferreira, Theresa Ramalho, Maria Talita Pacheco de Oliveira, Luis Cezar Rodrigues
Rok vydání:	2015
Předmět:	Male Leukocyte migration Cell Survival medicine.drug_class Acute Lung Injury Primary Cell Culture Immunology Peritonitis Lung injury Pharmacology Toxicology Anti-inflammatory chemistry.chemical_compound Peritoneal cavity Alkaloids In vivo Tetrahydroisoquinolines Toxicity Tests Acute Animals Edema Immunology and Allergy Medicine Cells Cultured Mice Inbred BALB C Molecular Structure business.industry Anti-Inflammatory Agents Non-Steroidal Degranulation General Medicine Disease Models Animal medicine.anatomical_structure chemistry Toxicity Macrophages Peritoneal Cytokines Female business Histamine
Zdroj:	Immunopharmacology and Immunotoxicology. 37:400-412
ISSN:	1532-2513 0892-3973
DOI:	10.3109/08923973.2015.1070173
Popis:	The alkaloid 2-methoxy-4-(7-methoxy-1,2,3,4-tetrahydroisoquinolin-1-yl)phenol (MHTP) was synthesized to prospect new compounds with therapeutic properties. Thus, the goal of this study was to evaluate the MHTP anti-inflammatory effect by in vivo and in vitro assays. The MHTP toxicity was analyzed. We found that MHTP pre-treatment (2.5-10 mg/kg) showed antiedematogenic effect (p 0.05) in carrageenan-induced paw edema by inhibiting the PGE2 action independently of mast cell degranulation or histamine activity. MHTP also diminished (p 0.01) total leukocyte migration in 41.5% into peritoneal cavity during carrageenan-induced peritonitis, reducing polymorphonuclear cells (PMNs) (59.6%) and proteins levels (29.4%). MHTP in an experimental model of acute lung injury inhibited (p 0.001) total inflammatory cell migration into the lungs and PMNs in 58% and 67.5%, respectively. Additionally, MHTP did not present cytotoxicity at concentrations of 10, 25 or 50 μM but decreased (p 0.001) the NO production in 24%, 47% and 39%, respectively. The alkaloid also reduced (p 0.001, in lipopolysaccharide (LPS)-stimulated macrophages (1 μg/mL), IL-1β, IL-6 and IL-10 levels in 35.7%, 31.0% and 33.4%, respectively. The results obtained in this study allow us to conclude that the inedited synthetic alkaloid, MHTP has anti-inflammatory effect by inhibiting PGE2 function as well as inhibiting inflammatory cell migration to the inflamed site and attenuated the acute lung injury disease by inhibiting the migration of neutrophil to the lung. However, further studies will be carried out to demonstrate the mechanisms of action of the molecule and explore its potential as a future drug to treat inflammatory processes.
Databáze:	OpenAIRE
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