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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Gut. 2011 Aug 26;61(5):753–764. doi: 10.1136/gutjnl-2011-300007

Figure 8.

Figure 8

Schematic diagram of working model. Histamine secretion increases after histidine decarboxylase (HDC) expression is enhanced during cholangiocarcinogenesis. Increased HDC and histamine levels induce the growth of cholangiocarcinoma (CCA). Use of the HDC inhibitor or the H1 histamine receptor (H1HR) antagonist decreases histamine secretion levels and tumour growth.