Hepatocellular carcinoma arterial microvasculature and tumor sinusoids

Hepatocellular carcinoma (HCC) arterial microvasculature and tumor sinusoids represent the specialized vascular environment that supports the growth and metastasis of liver cancer [1]. During hepatocarcinogenesis, the tumor transitions from a portal vein-dominated blood supply to a predominantly arterial supply, a process known as arterialization [2]. Simultaneously, the normal fenestrated liver sinusoids undergo capillarization, where they lose their pores and develop a basement membrane, typically marked by the expression of CD34 [3]. This remodeled microvasculature is highly disorganized and permeable, driven by the overproduction of pro-angiogenic factors like vascular endothelial growth factor (VEGF) [1][4]. Therapeutic strategies often focus on this vascular network by using multi-kinase inhibitors or monoclonal antibodies to block angiogenic signaling, thereby starving the tumor of oxygen and nutrients [5]. Sources: [1] NIH/PMC4012904; [2] PubMed/23810286; [3] NIH/PMC3033731; [4] Nature Reviews Disease Primers (HCC); [5] StatPearls (Hepatocellular Carcinoma).

Other names

HCC tumor vasculatureCapillarized liver sinusoidsArterialized tumor vesselsHCC neovasculatureTumor-associated microvessels

Inhibition of pro-angiogenic signaling pathways (primarily VEGF/VEGFR, PDGF/PDGFR, and FGF/FGFR) to disrupt the formation and maintenance of the tumor's arterial blood supply and induce vascular regression [1][5].