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Inhibition of the liver expression of arylalkylamine N-acetyltransferase increases the expression of angiogenic factors in cholangiocytes

  
@article{HBSN3330,
	author = {Anastasia Renzi and Romina Mancinelli and Paolo Onori and Antonio Franchitto and Gianfranco Alpini and Shannon Glaser and Eugenio Gaudio},
	title = {Inhibition of the liver expression of arylalkylamine N-acetyltransferase increases the expression of angiogenic factors in cholangiocytes},
	journal = {Hepatobiliary Surgery and Nutrition},
	volume = {3},
	number = {1},
	year = {2014},
	keywords = {},
	abstract = {Background and aims: Reduction of biliary serotonin N-acetyltransferase (AANAT) expression and melatonin administration/secretion in cholangiocytes increases biliary proliferation and the expression of SR, CFTR and Cl–/HCO3–AE2. The balance between biliary proliferation/damage is regulated by several autocrine neuroendocrine factors including vascular endothelial growth factor-A/C (VEGF-A/C). VEGFs are secreted by several epithelia, where they modulate cell growth by autocrine and paracrine mechanisms. No data exists regarding the effect of AANAT modulation on the expressions of VEGFs by cholangiocytes. 
Methods: In this study, we evaluated the effect of local modulation of biliary AANAT expression on the cholangiocytes synthesis of VEGF-A/C. 
Results: The decrease in AANAT expression and subsequent lower melatonin secretion by cholangiocytes was associated with increased expression of VEGF-A/C. Overexpression of AANAT in cholangiocyte lines decreased the expression of VEGF-A/C. 
Conclusions: Modulation of melatonin synthesis may affect the expression of VEGF-A/C by cholangiocytes and may modulate the hepatic microvascularization through the regulation of VEGF-A/C expression regulating biliary functions.},
	issn = {2304-389X},	url = {https://hbsn.amegroups.org/article/view/3330}
}