Article (Scientific journals)
Effect of somatic growth, strain and sex on double-chamber plethysmographic respiratory function values in healthy mice
Flandre, Thierry; Leroy, Pascal; Desmecht, Daniel
2003In Journal of Applied Physiology, 94 (3), p. 1129-1136
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Keywords :
plethysmography; lung mechanics; ventilation
Abstract :
[en] Double-chamber plethysmography has been recognized since 1979 as a reference technique to measure pulmonary function values in guinea pigs, but it has not gained attention for use in mice. Theoretically, however, this technique combines the advantages of single-chamber plethysmography with a quantitative assessment of flow and/or volume and a calculated resistance, the interpretation of which in terms of bronchoconstriction is not disputed. Here we show that, when appropriately preconditioned, mice are able to gradually grow accustomed to the apparatus and display extremely stable nasal and thoracoabdominal flow tracings. Overall, strain, sex, and somatic growth had a significant effect on pulmonary function values. The changes in specific airway resistance (sRaw) and enhanced pause (Penh) values were never in the same direction, indicating that they measure different things. The respiratory frequency was far higher in C57BL/6 compared with BALB/c mice. Peak flows, minute volume, specific tidal and minute volumes, and sRaw were also higher, but Penh was smaller. Males breathed at a higher frequency than females, leading to a higher minute volume. Nevertheless, the specific volumes were considerably higher among females. Penh was lower in males, whereas sRaw was identical in both sexes. Changes associated with somatic growth were rapid and important between 5 and 9 wk, then slowed down between 9 and 12-13 wk and became almost imperceptible after.
Disciplines :
Animal production & animal husbandry
Veterinary medicine & animal health
Author, co-author :
Flandre, Thierry;  Université de Liège - ULiège > Département de Morphologie et Pathologie > Pathologie spéciale et autopsies
Leroy, Pascal ;  Université de Liège - ULiège > Département de productions animales > Biostatistique, économie, sélection animale
Desmecht, Daniel ;  Université de Liège - ULiège > Département de Morphologie et Pathologie > Pathologie spéciale et autopsies
Language :
English
Title :
Effect of somatic growth, strain and sex on double-chamber plethysmographic respiratory function values in healthy mice
Publication date :
2003
Journal title :
Journal of Applied Physiology
ISSN :
0021-8987
Publisher :
American Physiological Society
Volume :
94
Issue :
3
Pages :
1129-1136
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 January 2010

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