Tromantadine 53783-83-8 GlpBio

www.glpbio.com

Product Data Sheet

Product Name: Cat. No.: Chemical Name:

Tromantadine GC32214

CHEMICAL PROPERTIES Cas No.: 53783-83-8 Molecular Formula: Molecular Weight: Storage: Solubility:

Chemical Structure:

C16H28N2O2 280.41 Powder

Soluble in DMSO

Background

Tromantadine is a herpes simplex virus (HSV) inhibitor.

Tromantadine inhibits herpes simplex virus type 1 (KOS strain)−induced cytopathic effect and virus replication with limited toxicity to the cells. Vero and HEp−2 cells tolerate up to 2 mg of Tromantadine per 2x106 cells for 24−, 48−, or 96−h incubation periods with little change in cell morphology. Treatment of the cells with 10 to 50 μg of Tromantadine reduces herpes simplex virus−induced cytopathic effect. Treatment with 100 to 500 μg of Tromantadine inhibits herpes simplex virus−induced cytopathic effect and reduces virus production. Complete inhibition of virus production is observed with treatments of 500 μg to 1 mg. The antiherpetic activity of Tromantadine is dependent upon the viral inoculum size and the time of addition of the compound with respect to infection. Virion synthesis and viral polypeptide synthesis are inhibited by addition of Tromantadine at the time of infection or 4 h postinfection[1]. Tromantadine raises the bilayer to hexagonal phase transition temperature of synthetic phosphatidylethanolamines and is less disruptive to phospholipid packing. Tromantadine acts similar to cyclosporin A, previously demonstrated to inhibit viral−induced cell−cell fusion[2]. References:

[1]. Rosenthal KS, et al. Tromantadine: inhibitor of early and late events in herpes simplex virus replication. Antimicrob Agents Chemother. 1982 Dec;22(6):1031-6.

[2]. Cheetham JJ, et al. Comparison of the interaction of the anti-viral chemotherapeutic agents amantadine and tromantadine with model phospholipid membranes. Biosci Rep. 1987 Mar;7(3):225-30.

Research Update

1. Effect of Hydrofluoric Acid Concentration and Etching Time on Bond Strength to Lithium Disilicate Glass Ceramic. Oper Dent. 2017 Nov/Dec;42(6):606-615. doi: 10.2341/16-215-L. Epub 2017 Jul 14. PMID:28708007 Abstract

The aim of this study was to evaluate the influence of different concentrations of hydrofluoric acid (HF) associated with varied etching times on the microshear bond strength (μSBS) of a resin cement to a lithium disilicate glass ceramic. Two hundred seventy-five ceramic blocks (IPS e.max Press [EMX], Ivoclar Vivadent), measuring 8 mm × 3 mm thickness, were randomly distributed into five groups according to the HF concentrations (n=50): 1%, 2.5%, 5%, 7.5%, and 10%.

2. Does acid etching morphologically and chemically affect lithium disilicate glass ceramic surfaces? J Appl Biomater Funct Mater. 2017 Jan 26;15(1):e93-e100. doi: 10.5301/jabfm.5000303. PMID:27647389 Abstract

BACKGROUND: This study evaluated the surface morphology, chemical composition and adhesiveness of lithium disilicate glass ceramic after acid etching with hydrofluoric acid or phosphoric acid.METHODS: Lithium disilicate glass ceramic specimens polished by 600-grit silicon carbide paper were subjected to one or a combination of these surface treatments: airborne particle abrasion with 50-μm alumina (AA), etching with 5% hydrofluoric acid (HF) or 36% phosphoric acid (Phos), and application of silane coupling agent (Si). 3. Fatigue failure load of feldspathic ceramic crowns after hydrofluoric acid etching at different concentrations. J Prosthet Dent. 2018 Feb;119(2):278-285. doi: 10.1016/j.prosdent.2017.03.021. Epub 2017 May 26. PMID:28552291 Abstract

STATEMENT OF PROBLEM: Hydrofluoric acid etching modifies the cementation surface of ceramic restorations, which is the same surface where failure is initiated. Information regarding the influence of hydrofluoric acid etching on the cyclic loads to failure of ceramic crowns is lacking.PURPOSE: The purpose of this in vitro study was to evaluate the influence of different hydrofluoric acid concentrations on the fatigue failure loads of feldspathic ceramic crowns.