Linked Life Data

14599119

Source:http://linkedlifedata.com/resource/pubmed/id/14599119

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2003-11-5
pubmed:abstractText
11beta-Hydroxysteroid dehydrogenase type 1 (11beta-HSD1) behaves predominantly as an oxoreductase converting the receptor-inactive glucocorticoids to their active forms in vivo, while the type 2 isoform (11beta-HSD2) possesses only dehydrogenase activity and inactivates cortisol in human or corticosterone in rat. We determined enzyme activity of 11beta-HSD in rat lungs from fetus to adult, and examined whether 11beta-HSD1 exists in alveolar type II cells, the most important site for the synthesis of pulmonary surfactant in mature lungs, by immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR). Enzyme activity of 11beta-HSD1 and 2 in lung tissue homogenate were determined as NADP(+)- and NAD(+)-dependent conversion of corticosterone to 11-dehydrocorticosterone, respectively. We found that 11beta-HSD1 activity was increased progressively from 21 days gestation to 7 weeks after birth. 11beta-HSD2 activity was significantly lower than that of 11beta-HSD1 throughout gestation and after birth. Immunoreactivity for 11beta-HSD1 was detected in the cytoplasm of the cells in the alveolar region of adult rats. Some of these expressing 11beta-HSD1 were considered to be alveolar type II cells, because of their cuboid shape and localization at the corner of the alveoli. RT-PCR demonstrated 11beta-HSD1 mRNA in isolated alveolar type II cells. Our results suggest that alveolar type II cells enhance intracellular glucocorticoid availability via 11beta-HSD1. 11beta-HSD1 in alveolar type II cells is thought of as an autocrine amplifier of glucocorticoid action in the lung.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0918-8959
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
445-51
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Expression of 11 beta-hydroxysteroid dehydrogenase type 1 in alveolar epithelial cells in rats.
pubmed:affiliation
Department of Thoracic Surgery, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
pubmed:publicationType
Journal Article