Carotid body denervation effect on cytochrome oxidase activity in pre-Botzinger complex of developing rats. J Appl Physiol (1985) 2003 Mar;94(3):1115-21
Date
02/07/2003Pubmed ID
12571139DOI
10.1152/japplphysiol.00765.2002Scopus ID
2-s2.0-0037370872 (requires institutional sign-in at Scopus site) 25 CitationsAbstract
Previously, we found that the rat pre-Bötzinger complex (PBC) exhibited reduced cytochrome oxidase (CO) activity on postnatal days (P) 3-4 and especially on P12, with a concomitant decrease in glutamate and N-methyl-d-aspartate receptor subunit 1, and an increase in GABA, GABA(B), glycine receptor, and glutamate subunit 2. We hypothesized that the PBC would be more affected by carotid body denervation (CBD) during the two critical windows than at other times. Pairs of CBD and sham animals at each postnatal day from P2 to P14 and at P21 were operated on and survived for 3 days. Brain stems were processed for CO and neurokinin-1 receptor for the identification of PBC. Results indicate that CBD caused a significant loss in body weight in all animals and a reduction in PBC somal size when the surgery was between P2 and P7. CBD also induced a significant decrease in CO activity of the PBC in most animals and a distinct delay, as well as prolongation of the maturational process, especially when induced close to P3 and P11-P13.
Author List
Liu Q, Kim J, Cinotte J, Homolka P, Wong-Riley MTMESH terms used to index this publication - Major topics in bold
AnimalsAnimals, Newborn
Biomarkers
Carotid Body
Cell Size
Denervation
Densitometry
Electron Transport Complex IV
Immunohistochemistry
Medulla Oblongata
Neurons
Rats
Rats, Sprague-Dawley
Receptors, Neurokinin-1
