Topologic distributions of vasa vasorum and lymphatic vasa vasorum in the aortic adventitia--Implications for the prevalence of aortic diseases.

Abstract:

BACKGROUND AND AIMS:Vasa vasorum (VV) and lymphatic vasa vasorum (LVV) form their own networks in the adventitia. VV supply the aorta with nutrition and oxygen; however, the distribution and role of LVV remains to be determined. The purpose of this study was to investigate differences in the distribution of VV and LVV along the aorta. METHODS:Aortic samples were obtained from 22 autopsy cases without medical history of aortic diseases. Aortic segments were classified as arch (Ar), descending thoracic (De), suprarenal abdominal (S-Ab), and infrarenal abdominal (I-Ab). Adventitial VV and LVV were identified immunohistochemically. RESULTS:VV were most dense in the arch aorta, becoming less dense along the aorta in more distal segments, with the lowest density occurring in the infrarenal abdominal aorta. There was a significant correlation between the numbers of VV and medial thickness in the total aortic segments (r = 0.518, p < 0.01). In contrast, there was no significant correlation between the number of LVV and medial thickness in any aortic segments. However, there was a significant correlation between the number of LVV and intimal thickness in I-Ab (r = 0.425, p < 0.05). CONCLUSIONS:The distributions of adventitial VV and LVV were characteristic along the aortic segments. Differences in the distributions may imply the prevalence of aortic diseases such as dissection, abdominal aortic aneurysm, and atherosclerotic occlusive disease in each aortic segment.

journal_name

Atherosclerosis

journal_title

Atherosclerosis

authors

Sano M,Unno N,Sasaki T,Baba S,Sugisawa R,Tanaka H,Inuzuka K,Yamamoto N,Sato K,Konno H

doi

10.1016/j.atherosclerosis.2016.02.007

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

127-34

eissn

0021-9150

issn

1879-1484

pii

S0021-9150(16)30050-8

journal_volume

247

pub_type

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