PMID: 7536189Jan 1, 1995Paper

Lung growth in hypobaric normoxia, normobaric hypoxia, and hypobaric hypoxia in growing rats. I. Biochemistry

Journal of Applied Physiology
H S Sekhon, W M Thurlbeck

Abstract

Adaptive changes in cellular and connective tissue components of the lung after chronic exposure to reduced ambient oxygen and/or pressure were studied. Four-week-old male Sprague-Dawley rats were randomly divided into five groups (n = 12 each): 1) general control, room air (GC); 2) hypobaric normoxic; 3) normobaric hypoxic; 4) hypobaric hypoxic; and 5) weight-matched control, restricted food intake (WMC; weight matched to hypobaric hypoxic animals). Lung growth (lung weight and DNA, RNA, protein, hydroxyproline, and desmosine contents) diminished in WMC compared with GC. Somatic growth decreased in hypobaric and normobaric hypoxic rats compared with GC. Lung weight; DNA, RNA, protein, hydroxyproline, and desmosine contents; and RNA/DNA, protein/DNA, and desmosine/DNA ratios increased in both hypobaric and normobaric hypoxic rats compared with WMC. Hydroxyproline and desmosine contents and the hydroxyproline/DNA ratio were significantly higher in hypobaric than normobaric hypoxic rats. Hypobaric normoxia caused a slight somatic growth reduction, but biochemical parameters of lung growth remained unaffected. In conclusion, in growing animals, despite inhibition of lung growth due to reduced food consumption, accelerated lung gro...Continue Reading

Citations

Jul 29, 2004·American Journal of Respiratory and Critical Care Medicine·UNKNOWN ad hoc Statement Committee, American Thoracic Society
May 15, 2007·Journal of Toxicology and Environmental Health. Part a·Ahmad Mirfazaelian, Jeffrey W Fisher
Oct 17, 2009·Journal of Applied Physiology·Priya RavikumarConnie C W Hsia
Jul 16, 2020·American Journal of Respiratory and Critical Care Medicine·Emma Hodson, Peter Ratcliffe
Oct 8, 2005·Journal of Applied Physiology·Paul McDonoughRobert L Johnson
Jan 17, 2012·American Journal of Respiratory Cell and Molecular Biology·Cherry WongtrakoolEliot R Spindel
Sep 1, 1996·Respiration Physiology·H S Sekhon, W M Thurlbeck

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