Experimental antiasthmatic activity of RWJ 22108: A bronchoselective calcium entry blocker

David M. Ritchie, Thomas Kirchner, John B. Moore, John H. Dodd, Tahir Ahmed, David W. Anderson, Robert J. Capetola

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


RWJ 22108 (N-benzyl-N-methylaminoethyl 9-(2-chloro-6-fluorophenyl)-2,3,4,5,6,9-hexahydro-7-methyl-1,1-dioxothiacyclohepteno-[3,2-b]pyridine-8-carboxylate) is a new bronchoselective calcium entry blocker with potential use as an antiasthmatic agent. Previous studies have shown that RWJ 22108 is a po-tent calcium entry blocker in vitro and demonstrates tissue selectivity for air-way smooth muscle over vascular smooth muscle. The current study demon-strates the in vivo activity of RWJ 22108 in several different models of airway obstruction and asthma. RWJ 22108 relaxes preconstricted airways in dogs with little effect on blood pressure when administered by aerosol. In addition, it inhibits airway obstruction induced by antigen, histamine and exogenous leu-kotriene D4 in guinea pigs. In a conscious sheep model of allergic asthma, aero-sol RWJ 22108 inhibits antigen-induced early and late phase airway obstruction and also the cellular infiltration associated with late phase. Total leukotrienes production is decreased in the guinea pig model probably as a result of fewer inflammatory cells infiltrating the lungs as shown in the sheep model of late phase. These data suggest that RWJ 22108 may have pharmacological potential in the clinical management of asthma.

Original languageEnglish (US)
Pages (from-to)274-282
Number of pages9
JournalInternational Archives of Allergy and Immunology
Issue number3
StatePublished - Jan 1 1993


  • Airway obstruction
  • Asthma
  • Calcium entry blocker
  • RWJ 22108

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


Dive into the research topics of 'Experimental antiasthmatic activity of RWJ 22108: A bronchoselective calcium entry blocker'. Together they form a unique fingerprint.

Cite this