Title

Sympathetic-Nerve Influence On Alveolar Type-Ii Cell Ultrastructure

Authors

Authors

D. J. Crittenden; L. A. Alexander;D. L. Beckman

Comments

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Abbreviated Journal Title

Life Sci.

Keywords

PULMONARY SURFACTANT; LAMELLAR BODIES; MULTIVESICULAR BODIES; ALVEOLAR; TYPE II CELLS; RAT LUNG; SURFACTANT SECRETION; PULMONARY SURFACTANT; LAMELLAR BODIES; STIMULATION; PHOSPHOLIPIDS; RELEASE; Medicine, Research & Experimental; Pharmacology & Pharmacy

Abstract

Pulmonary surfactant release from lamellar bodies in alveolar type II cells in response to exogenous and circulating catecholamines is well documented but sympathetic influences from direct nerve stimulation are not as extensively studied. In older to study sympathetic nerve influence on release, ultrastructure of type II cells was examined following one min stimulation of the stellate ganglion (SGS) which sends sympathetic fibers to lung parenchyma. Type II cell secretion was assessed by measuring volume density of lamellar bodies, interpreting decreased volume density to indicate increased secretion according to accepted stereologic principles. The present study showed lamellar body volume density was I educed 20.8% in type II cells of SGS animals. Multivesicular body volume density was increased 150% by SGS, but Golgi bodies were unchanged. These data are consistent with type II cell origin of at least some of the increased saturated phospholipid recovered from airspaces in previous SGS studies, and support the view that sympathetic nerve activity may contribute to surfactant homeostasis under some conditions.

Journal Title

Life Sciences

Volume

55

Issue/Number

15

Publication Date

1-1-1994

Document Type

Article

Language

English

First Page

1229

Last Page

1235

WOS Identifier

WOS:A1994PE97500008

ISSN

0024-3205

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