Developmental and functional characteristics of the thoracic aorta perivascular adipocyte

Developmental and functional characteristics of the thoracic aorta perivascular adipocyte
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胸主动脉血管周围脂肪细胞的发育和功能特征

DOI:
10.1007/s00018-018-2970-1
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发表时间:
2018-11
影响因子:
8
通讯作者:
Gao Pingjin
Gao Pingjin
中科院分区:
生物学1区
文献类型:
--
作者:
Ye Maoqing;Ruan Cheng Chao;Fu Mengxia;Xu Lian;Chen Dongrui;Zhu Minsheng;Zhu Dingliang;Gao Pingjin

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胸主动脉血管周围脂肪组织(T-PVAT)在调节血管稳态中具有重要作用。然而,T-PVAT中脂肪细胞的发育特征和细胞谱系尚不清楚。我们发现,T-PVAT包含三个长条形脂肪库,前T-PVAT(A-T-PVAT),左外侧T-PVAT(LL-T-PVAT),和右外侧T-PVAT(RL-T-PVAT)。与两侧T-PVAT(L-T-PVAT)相比,A-T-PVAT显示出不同的转录谱和发育起源。谱系追踪研究表明,A-T-PVAT脂肪细胞主要来源于SM 22 α+祖细胞,而L-T-PVAT含有SM 22 α+和Myf 5+细胞。我们还发现L-T-PVAT比A-T-PVAT含有更多的UCP 1+棕色脂肪细胞,并且L-T-PVAT比A-T-PVAT对主动脉有更大的舒张作用。输注血管紧张素II的高血压小鼠显示出比L-T-PVAT更大的巨噬细胞浸润到A-T-PVAT中。这些综合结果表明L-T-PVAT与A-T-PVAT具有不同的细胞谱系,并提示L-T-PVAT和A-T-PVAT具有不同的生理和病理功能。
Thoracic aorta perivascular adipose tissue (T-PVAT) has critical roles in regulating vascular homeostasis. However, the developmental characteristics and cellular lineage of adipocyte in the T-PVAT remain unclear. We show that T-PVAT contains three long strip-shaped fat depots, anterior T-PVAT (A-T-PVAT), left lateral T-PVAT (LL-T-PVAT), and right lateral T-PVAT (RL-T-PVAT). A-T-PVAT displays a distinct transcriptional profile and developmental origin compared to the two lateral T-PVATs (L-T-PVAT). Lineage tracing studies indicate that A-T-PVAT adipocytes are primarily derived from SM22α+progenitors, whereas L-T-PVAT contains both SM22α+and Myf5+cells. We also show that L-T-PVAT contains more UCP1+brown adipocytes than A-T-PVAT, and L-T-PVAT exerts a greater relaxing effect on aorta than A-T-PVAT. Angiotensin II-infused hypertensive mice display greater macrophage infiltration into A-T-PVAT than L-T-PVAT. These combined results indicate that L-T-PVAT has a distinct development from A-T-PVAT with different cellular lineage, and suggest that L-T-PVAT and A-T-PVAT have different physiological and pathological functions.
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