PMID- 9430373 OWN - NLM STAT- MEDLINE DCOM- 19980205 LR - 20190718 IS - 0021-9150 (Print) IS - 0021-9150 (Linking) VI - 135 IP - 2 DP - 1997 Dec TI - Apoptotic cell death in atherosclerotic plaques of hyperlipidemic knockout mice. PG - 235-9 AB - In an attempt to understand the roles of apoptosis in the development of atherosclerosis, we classified lesions developed in the aortas of apo E- and LDL receptor-deficient mice, murine models of atherosclerosis, and determined frequency, spatial distribution and cell types of apoptotic cells in each lesion. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) and nuclear staining with propidium iodide were used to demonstrate apoptotic cells. Mean frequencies of TUNEL-positive cells were as follows: 0%, in Type I, 0.3% in Type II, 0.05% in Type III, 0.06% in Type IV and 0.06% in Type V lesions. Most of the TUNEL-positive cells were filled with fat and distributed in close proximity to lipid pools. The TUNEL-positive cells in the intimal side of the lipid cores were macrophages, while some of those in the adventitial side were smooth muscle cells. In conclusion, apoptosis is involved in the active turn-over of foam cells of both macrophage- and smooth muscle cell-lineage especially in the early atherosclerotic lesions of the hyperlipidemic mice. FAU - Harada, K AU - Harada K AD - The Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Japan. FAU - Chen, Z AU - Chen Z FAU - Ishibashi, S AU - Ishibashi S FAU - Osuga, J AU - Osuga J FAU - Yagyu, H AU - Yagyu H FAU - Ohashi, K AU - Ohashi K FAU - Yahagi, N AU - Yahagi N FAU - Shionoiri, F AU - Shionoiri F FAU - Sun, L AU - Sun L FAU - Yazaki, Y AU - Yazaki Y FAU - Yamada, N AU - Yamada N LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Ireland TA - Atherosclerosis JT - Atherosclerosis JID - 0242543 RN - 0 (Receptors, LDL) RN - EC 2.7.7.31 (DNA Nucleotidylexotransferase) SB - IM MH - Age Factors MH - Animals MH - Apoptosis/*genetics MH - Arteriosclerosis/genetics/metabolism/*pathology/physiopathology MH - Cell Death/genetics MH - DNA Nucleotidylexotransferase/analysis MH - Diet, Atherogenic MH - Female MH - Hyperlipidemias/genetics/metabolism/*pathology/physiopathology MH - Immunohistochemistry MH - Male MH - Mice MH - Mice, Knockout MH - Receptors, LDL/deficiency/genetics EDAT- 1998/01/16 00:00 MHDA- 1998/01/16 00:01 CRDT- 1998/01/16 00:00 PHST- 1998/01/16 00:00 [pubmed] PHST- 1998/01/16 00:01 [medline] PHST- 1998/01/16 00:00 [entrez] AID - S0021-9150(97)00167-6 [pii] AID - 10.1016/s0021-9150(97)00167-6 [doi] PST - ppublish SO - Atherosclerosis. 1997 Dec;135(2):235-9. doi: 10.1016/s0021-9150(97)00167-6.