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1.400042 重庆,陆军特色医学中心风湿免疫科
2.400038 重庆,陆军军医大学(第三军医大学)军事预防医学系热带医学教研室
[戴欢子,E-mail:dhz084426@163.com DAI Huanzi, E-mail: dhz084426@163.com
收稿:2023-12-25,
修回:2024-03-07,
纸质出版:2024-05-30
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宋用为, 王玲, 陈文婷, 等. 罗沙司他通过上调HIF-1α减轻热打击诱导的肾小管上皮细胞凋亡与衰老[J]. 陆军军医大学学报, 2024,46(10):1092-1099.
Yongwei SONG, Ling WANG, Wenting CHEN, et al. Roxadustat attenuates heat stress-induced apoptosis and senescence in renal tubular epithelial cells by upregulating HIF-1α[J]. Journal of Army Medical University, 2024, 46(10): 1092-1099.
宋用为, 王玲, 陈文婷, 等. 罗沙司他通过上调HIF-1α减轻热打击诱导的肾小管上皮细胞凋亡与衰老[J]. 陆军军医大学学报, 2024,46(10):1092-1099. DOI: 10.16016/j.2097-0927.202312123.
Yongwei SONG, Ling WANG, Wenting CHEN, et al. Roxadustat attenuates heat stress-induced apoptosis and senescence in renal tubular epithelial cells by upregulating HIF-1α[J]. Journal of Army Medical University, 2024, 46(10): 1092-1099. DOI: 10.16016/j.2097-0927.202312123.
目的
2
探讨罗沙司他对热打击诱导的肾小管上皮细胞(HK-2细胞)凋亡与衰老的影响及其机制。
方法
2
体外培养HK-2细胞,用不同浓度(10、20、30、40、50 μmol/L)的罗沙司他处理24 h,通过CCK-8法确定罗沙司他的最佳干预浓度。将HK-2细胞分为4组(
n
=3): 对照组、罗沙司他组(30 μmol/L、24 h)、热打击组(43 ℃、2 h)、热打击+罗沙司他组(30 μmol/L罗沙司他处理24 h后热打击2 h)。通过CCK-8检测细胞活力;Western blot检测缺氧诱导因子-1α(hypoxia-inducible factor-1,HIF-1α)、Cleaved Caspase-3
、p16、p21蛋白表达量;免疫荧光检测HIF-1α分布;细胞衰老β-半乳糖苷酶染色试剂盒检测SA-β-Gal活性;TUNEL染色检测细胞凋亡情况。
结果
2
用30 μmol/L罗沙司他处理的细胞活力最高。与对照组比较,热打击组细胞活力显著降低(
P
<
0.05);HIF-1α、Cleaved Caspase-3、p16、p21蛋白表达量显著增加(
P
<
0.05);SA-β-Gal活性显著增加(
P
<
0.05);TUNEL阳性细胞占比显著增加(
P
<
0.05)。与热打击组比较,热打击+罗沙司他组Cleaved Caspase-3、p16、p21蛋白表达量显著降低(
P
<
0.05);SA-β-Gal活性显著降低[(65.44±5.00)%
vs
(77.15±2.61)%,
P
<
0.05
]
;TUNEL阳性细胞占比显著降低[(16.73±2.20)%
vs
(46.40±13.87)%,
P
<
0.05
]
,细胞活力显著增加[(86.33±4.51)%
vs
(66.33±8.50)%,
P
<
0.05
]
;HIF-1α蛋白表达量进一步增加(
P
<
0.05)。免疫荧光结果显示HIF-1α主要分布在细胞核及细胞核周围。
结论
2
罗沙司他通过上调HIF-1α减轻热打击诱导的肾小管上皮细胞凋亡和衰老。
Objective
2
To investigate the effect and underlying mechanism of roxadustat on apoptosis and senescence of renal tubular epithelial cell line HK-2 induced by heat stress.
Methods
2
After HK-2 cells were treated with different concentrations of roxadustat (10
20
30
40 and 50 μmol/L) for 24 h
CCK-8 assay was used to determine the optimal intervention concentration of roxadustat. HK-2 cells were divided into 4 groups (
n
=3): control group
roxadustat group (30 μmol/L
24 h)
heat-stress group (43 ℃
2 h)
and heat-stress+roxadustat group (30 μmol/L roxadustat treatmnet for 24 h followed by heat-stress 2 h). Cell viability was detected by CCK-8 assay. Expression of hypoxia-inducible factor-1α (HIF-1α)
Cleaved Caspase-3
p16 and p21 at protein level was detected by Western blotting. Immunofluorescence assay was employed to observe the distribution of HIF-1α. β-galactosidase staining kit was utilized to detect SA-β-Gal activity. TUNEL staining was used to measure cell apoptosis.
Results
2
The highest
cell viability was observed in the cells after 30 μmol/L roxadustat treatment. Heat stress resulted in a significant decrease in cell viability (
P
<
0.05)
elevated protein levels of HIF-1α
Cleaved Caspase-3
p16 and p21(
P
<
0.05)
enhanced SA-β-Gal activity (
P
<
0.05) and increased percentage of TUNEL-positive cells (
P
<
0.05) when compared with the cells in the control group. In comparison with the heat-stress group
the heat-stress+roxadustat group showed significant decrease in the protein levels of Cleaved Caspase-3
p16 and p21 (
P
<
0.05)
reduced activity of SA-β-Gal [(65.44±5.00)%
vs
(77.15±2.61)%
P
<
0.05
]
and decreased percentage of TUNEL-positive cells [(16.73±2.20)%
vs
(46.40±13.87)%
P
<
0.05
]
but increase in cell viability [(86.33±4.51)%
vs
(66.33±8.50)%
P
<
0.05
]
as well as HIF-1α protein expression (
P
<
0.05). Furthermore
immunofluorescence assay showed that HIF-1α was mainly distributed in the nucleus and perinucleus.
Conclusion
2
Roxadustat attenuates heat stress-induced apoptosis and senescence of renal tubular epithelial cells by upregulating HIF-1α.
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