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第44卷第4期 张 维,倪进荣,周 俊,等. p53半剂量缺失纠正1,25(OH) 2D3缺乏小鼠的骨质疏松[J].
2024年4月 南京医科大学学报(自然科学版),2024,44(04):455-461,545 ·461 ·
究表明,当细胞产生的ROS水平高于自身清除能力 Downregulation of Sirt1 in Mice[J]. Int J Biol Sci,2023,
时,会发生氧化应激反应,导致端粒氧化、DNA 损 19(2):610-624
伤,并激活 ATM 激酶活性,促进组蛋白 H2AX 的磷 [9] CAI Y,LIU H,S E,et al. Deficiency of telomere⁃associat⁃
酸化,直接或间接使p53发生磷酸化,上调p53的活 ed repressor activator protein 1 precipitates cardiac aging
in mice via p53/PPARα signaling [J]. Theranostics,
性,促进细胞衰老 [25-27] 。本研究中,活性维生素D缺
2021,11(10):4710-4727
乏小鼠细胞 ROS 水平明显升高,抗氧化酶 SOD1 表
[10]YANG Y,SUN Y,MAO W W,et al. Oxidative stress in⁃
达降低,而 p53 半剂量缺失能够较好地纠正活性维
duces downregulation of TP53INP2 and suppresses osteo⁃
生素D缺乏小鼠的高氧化应激水平。
genic differentiation of BMSCs during osteoporosis
综上所述,当给予 1α(OH)ase p53 小鼠高钙
+/-
-/-
through the autophagy degradation pathway [J]. Free
磷补充后,随着血清钙、磷和 PTH 水平纠正,p53 半 Radic Biol Med,2021,166:226-237
剂量缺失则呈现了其在改善活性维生素D缺失引起 [11]DONEHOWER L A,HARVEY M,SLAGLE B L,et al.
的骨质疏松中的纠正作用,包括抑制氧化应激,促 Bradley,A. Mice deficient for p53 are developmentally
进成骨细胞骨形成,抑制破骨细胞骨吸收。因此, normal but susceptible to spontaneous tumours[J]. Na⁃
ture,1992,356(6366):215-221
p53 半剂量缺失可通过增强抗氧化能力纠正 1,25
(OH)D3缺乏小鼠的骨质疏松。 [12]CHEN L,SHI X,XIE J,et al. Apelin⁃13 induces mitopha⁃
2
gy in bone marrow mesenchymal stem cells to suppress in⁃
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