Journal
RESPIRATORY PHYSIOLOGY & NEUROBIOLOGY
Volume 162, Issue 1, Pages 80-84Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.resp.2008.04.003
Keywords
control of breathing; body plethysmography; development; hypoxic ventilatory response; gene targeting
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In order to examine whether ATP-sensitive potassium channel Kir6.2 is involved in hypoxic ventilatory responses, especially in hypoxic ventilatory depression (HVD), and whether the involvement shows age-dependence, we measured the hypoxic ventilatory response in the Kir6.2-/- knockout mouse (Kir6.2-/-) in an unanesthetized unrestrained state by means of pressure plethysmography in the 2nd and 4th postnatal weeks, and compared the response with that of its wild type counterpart, the C57BL6/J mouse. In the 4th postnatal week, but not in the 2nd week, the Kir6.2-/- exhibited a larger and longer initial augmentation and a weaker subsequent depression of respiratory frequency and ventilation in response to hypoxia (FIO2 =0.12 in N-2) These findings suggest that Kir6.2 is involved in HVD of the mouse at a certain point during the postnatal development. (c) 2008 Elsevier B.V. All rights reserved.
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