Linked Life Data

11292181

Source:http://linkedlifedata.com/resource/pubmed/id/11292181

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2001-4-6
pubmed:abstractText
The effect of histamine on intracellular free Ca2+ levels ([Ca2+]i) in HA22/VGH human hepatoma cells were evaluated using fura-2 as a fluorescent Ca2+ dye. Histamine (0.2-5 microM) increased [Ca2+]i in a concentration-dependent manner with an EC50 value of about 1 microM. The [Ca2+]i response comprised an initial rise, a slow decay, and a sustained phase. Extracellular Ca2+ removal inhibited 50% of the [Ca2+]i signal. In Ca2+-free medium, after cells were treated with 1 microM thapsigargin (an endoplasmic reticulum Ca2+ pump inhibitor), 5 microM histamine failed to increase [Ca2+]i. After pretreatment with 5 microM histamine in Ca2+-free medium for 4 min, addition of 3 mM Ca2+ induced a [Ca2+]i increase of a magnitude 7-fold greater than control. Histamine (5 microM)-induced intracellular Ca2+ release was abolished by inhibiting phospholipase C with 2 microM 1-(6-((17beta-3-methoxyestra-1,3,5(10)-trien-17-yl)amino)hexyl)-1H-pyrrole-2,5-dione (U73122), and by 5 microM pyrilamine but was not altered by 50 microM cimetidine. Together, this study shows that histamine induced [Ca2+]i increases in human hepatoma cells by stimulating H1, but not H2, histamine receptors. The [Ca2+]i signal was caused by Ca2+ release from thapsigargin-sensitive endoplasmic reticulum in an inositol 1,4,5-trisphosphate-dependent manner, accompanied by Ca2+ entry.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0304-4920
pubmed:author
pubmed:issnType
Print
pubmed:day
31
pubmed:volume
43
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
165-9
pubmed:dateRevised
2009-8-12
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Histamine-Induced increases in intracellular free Ca2+ levels in hepatoma cells.
pubmed:affiliation
Department of Internal Medicine, Kaohsiung Veterans General Hospital, Taiwan, ROC.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't