Mucosal adenosine stimulates chloride secretion in canine tracheal epithelium

Journal Article · Fri Aug 01 00:00:00 EDT 1986 · Am. J. Physiol.; (United States)

OSTI ID:6291961

Pratt, A D; Clancy, G; Welsh, M J

Adenosine is a local regulator of a variety of physiological functions in many tissues and has been observed to stimulate secretion in several Cl-secreting epithelia. In canine tracheal epithelium the authors found that adenosine stimulates Cl secretion from both the mucosal and submucosal surfaces. Addition of adenosine, or its analogue 2-chloroadenosine, to the mucosal surface potently stimulated Cl secretion with no effect on the rate of Na absorption. Stimulation resulted from an interaction of adenosine with adenosine receptors, because it was blocked by the adenosine receptor blocker, 8-phenyltheophylline. The adenosine receptor was a stimulatory receptor as judged by the rank-order potency of adenosine and its analogues and by the increase in cellular adenosine 3',5'-cyclic monophosphate levels produced by 2-chloroadenosine. Adenosine also stimulated Cl secretion when it was added to the submucosal surface, although the maximal increase in secretion was less and it was much less potent. The observation that mucosal 8-phenyletheophylline blocked the effect of submucosal 2-chloroadenosine, whereas submucosal 8-phenyltheophylline did not prevent a response to mucosal or submucosal 2-chloroadenosine, suggests that adenosine receptors are located on the mucosal surface. Thus submucosal adenosine may stimulate secretion by crossing the epithelium and interacting with receptors located on the mucosal surface. Because adenosine can be released from mast cells located in the airway lumen in response to inhaled material, and because adenosine stimulated secretion from the mucosal surface, it may be in a unique position to control the epithelium on a regional level.

• Research Organization: Univ. of Iowa College of Medicine, Iowa City
• OSTI ID: 6291961
• Journal Information: Am. J. Physiol.; (United States), Vol. 251:2
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
ADENOSINE
BIOCHEMISTRY
CHLORINE 36
MEMBRANE TRANSPORT
IONS
SODIUM 22
CHLORIDES
DOGS
EPITHELIUM
MUCOUS MEMBRANES
RECEPTORS
SECRETION
SODIUM COMPOUNDS
THEOPHYLLINE
TRACHEA
VASODILATORS
ALKALI METAL COMPOUNDS
ALKALI METAL ISOTOPES
ANIMAL TISSUES
ANIMALS
AROMATICS
AZAARENES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BODY
CARDIOVASCULAR AGENTS
CHARGED PARTICLES
CHEMISTRY
CHLORINE COMPOUNDS
CHLORINE ISOTOPES
DRUGS
ELECTRON CAPTURE RADIOISOTOPES
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
ISOTOPES
LIGHT NUCLEI
MAMMALS
MEMBRANES
NUCLEI
NUCLEOSIDES
NUCLEOTIDES
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PURINES
RADIOISOTOPES
RESPIRATORY SYSTEM
RIBOSIDES
SODIUM ISOTOPES
TISSUES
VERTEBRATES
XANTHINES
YEARS LIVING RADIOISOTOPES
551001* - Physiological Systems- Tracer Techniques