Detection of histidine decarboxylase mRNA in human vascular smooth muscle and endothelial cells.
OBJECTIVE
The objective of this study was to investigate histamine synthesis capability of human vascular smooth muscle and endothelial cells by detecting histidine decarboxylase (HDC) mRNA.


METHODS
HDC catalyzes exclusively the formation of histamine in mammalian cells. Experiments utilizing nested reverse transcription-polymerase chain reaction (nRT-PCR) were conducted to detect the presence of HDC mRNA. Human aortic smooth muscle cells (HAoSMC) and human aortic endothelial cells (HAEC) were cultured and RNA was extracted and amplified using two sets of HDC-specific primers. Rat liver and kidney RNA were isolated and amplified to serve as positive and negative controls, respectively.


RESULTS
Gel electrophoresis of HAoSMC, HAEC and liver mRNA revealed bands coinciding with an expected product size of 440 base pairs. Sequence analysis revealed that the observed bands were the appropriate HDC amplicons.


CONCLUSIONS
These findings are the first to indicate the presence of HDC mRNA in vascular smooth muscle cells and confirm the presence of HDC mRNA in endothelial cells which is consistent with an ability of these cell types to synthesize histamine in the vascular wall.
Tippens
A S
AS
Department of Pharmacology, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25704-9388, USA. tippens1@marshall.edu
Gruetter
C A
CA
D000818:Animals; D001011:Aorta / Q000166:cytology; D002478:Cells, Cultured; D017931:DNA Primers / Q000737:chemistry; D004730:Endothelium, Vascular / Q000166:cytology / Q000378:metabolism*; D006632:Histamine / Q000737:chemistry; D006640:Histidine Decarboxylase / Q000378:metabolism*; D006801:Humans; D007668:Kidney / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D009131:Muscle, Smooth, Vascular / Q000378:metabolism*; D012313:RNA / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism*; D051381:Rats; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA
D017931:DNA Primers; D012333:RNA, Messenger; D012313:RNA; D006632:Histamine; D006640:Histidine Decarboxylase