title: [Effect of cAMP on the function of endothelial cells and fibromuscular proliferation after the injury of the carotid and coronary arteries in a porcine model].
abstract: OBJECTIVE
  Reendothelization of damaged blood vessels protects against the vascular injury response. We evaluated in vivo whether a systemic increase in cAMP accelerates reendothelization and attenuates intimal hyperplasia in injured swine carotid and coronary arteries.
  
  
  METHODS
  Both carotid arteries of 10 swines were subjected to balloon injury. Five animals had been treated with 2 ml (10 mg) of Forskolin, an activator of the adenylate cyclase, and another 5 with 2 ml of saline solution. These animals were sacrificed at day 8, and carotid artery reendothelization was evaluated. The descendent coronary (DC) artery of another 19 pigs was injured by atherotome. Nine animals had been treated with 2 ml of Forskolin, and another 10 with 2 ml of saline solution. These animals were sacrificed at day 28, with myointimal proliferation and arterial geometric remodelation being evaluated. Likewise, in these animals intracellular cAMP levels were measured at baseline and 28 and 60 minutes after saline solution or Forskolin administration and 90 min after arterial injury.
  
  
  RESULTS
  Eight days after balloon injury, carotid artery reendothelization was greater in the Forskolin-treated group compared with the control group (p = 0.02), and the number of CD31 positive cells was statistically increased in the treated group (38 +/- 11 cells) versus controls (11 +/- 9 cells). Although the degree of vascular injury caused by atherotome was similar in all of the arteries in the control group, restenosis was only observed in 40% of these animals. Correlation analysis demonstrated that intracellular cAMP may condition arterial geometric remodeling and the diameter of the lumen after vascular injury.
  
  
  CONCLUSIONS
  Our results suggest that cAMP may promote reendothelization and attenuate fibromuscular proliferation.
authors.affiliation: Servicios de Cardiología Intervencionista, Hospital Clinico San Corlos, Madrid. pfantidis@hcsc.insalud.es
authors.forename: P
authors.initials: P
authors.lastname: Fantidis
authors.forename: A
authors.initials: A
authors.lastname: Fernández-Ortiz
authors.forename: P
authors.initials: P
authors.lastname: Aragoncillo
authors.forename: T
authors.initials: T
authors.lastname: Pérez De Prada
authors.forename: M
authors.initials: M
authors.lastname: Sanmartín
authors.forename: J
authors.initials: J
authors.lastname: López
authors.forename: M
authors.initials: M
authors.lastname: Sabaté
authors.forename: J
authors.initials: J
authors.lastname: Escaned
authors.forename: F
authors.initials: F
authors.lastname: Alfonso
authors.forename: R
authors.initials: R
authors.lastname: Hernández
authors.forename: C
authors.initials: C
authors.lastname: Bañuelos
authors.forename: C
authors.initials: C
authors.lastname: Macay
mesh_terms: D000818:Animals; D020212:Carotid Artery Injuries / Q000378:metabolism / Q000473:pathology*; D002404:Catheterization / Q000009:adverse effects*; D002455:Cell Division; D005576:Colforsin / Q000494:pharmacology; D003331:Coronary Vessels / Q000166:cytology* / Q000293:injuries / Q000378:metabolism; D000242:Cyclic AMP / Q000378:metabolism / Q000502:physiology*; D004730:Endothelium, Vascular / Q000166:cytology* / Q000293:injuries / Q000378:metabolism; D023421:Models, Animal; D012008:Recurrence; D013552:Swine; D014654:Vascular Patency
chemical_list: D005576:Colforsin; D000242:Cyclic AMP