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·1234 · 南 京 医 科 大 学 学 报 2025年9月
中 [15] 。靶向 EGFR 突变的小分子 EGFR⁃TKI 改善了
3 讨 论
这些患者的预后和治疗结果。奥希替尼是一种不
EGFR突变存在于40%~60%的东亚LUAD患者 可 逆 的 第 3 代 EGFR ⁃ TKI,已 被 批 准 用 于 EGFR
A B
si⁃NC 100 100 HCC827/OR si⁃circ0003633
1.5 HCC827/OR si⁃NC
si⁃circ0003633⁃1# (%) 80 (%) 80
Relative expression of cirrc_0003633 1.0 ** Cell viability 60 IC50=4.758 μmol/L Cell viability 60 IC50=2.860 μmol/L
si⁃circ0003633⁃2#
40
40
20
20
0.5
**
**
**
0
00 0.5 1.0 1.5 2.0 0 00 0.5 1.0 1.5 2.0
0 Osimertinib concentation[lg(μmol/L)] Osimertinib concentation[lg(μmol/L)]
HCC827/OR H1975/OR
C HCC827/OR H1975/OR
si⁃NC si⁃NC
si⁃circ_0003633 si⁃circ_0003633
4 si⁃NC+1.0 μmol/L Osimertinib 4 si⁃NC+1.0 μmol/L Osimertinib
si⁃circ_0003633+1.0 μmol/L Osimertinib si⁃circ_0003633+1.0 μmol/L Osimertinib
nm) 3 ** nm) 3 **
(450 2 ** ** (450 2 ** **
D
1 ** D 1 **
**
** **
0 0
0 24 48 72 96 0 24 48 72 96
Incubation time(h) Incubation time(h)
D HCC827/OR H1975/OR
si⁃NC
si⁃NC si⁃circ_0003633 si⁃NC si⁃circ_0003633 si⁃circ_0003633
si⁃NC+1.0 μmol/L Osimertinib
μmol/L 250 ** * * **
si⁃circ_0003633+1.0 μmol/L Osimertinib
0 200 ** *
Osimertinib Number of colonies 150
100
1.0 μmol/L 50
0
HCC827/OR H1975/OR
si⁃NC
E HCC827/OR H1975/OR si⁃circ_0003633
si⁃NC si⁃circ_0003633 si⁃NC si⁃circ_0003633 si⁃NC+1.0 μmol/L Osimertinib
si⁃circ_0003633+1.0 μmol/L
200 Osimertinib
μmol/L 150 * * * **
Osimertinib 0 Number of cells 100 ** *
1.0 μmol/L 50
0
HCC827/OR H1975/OR
A:qRT⁃PCR was used to detect the knockdown efficiency of circ_0003633. B:The IC50 value changed after knockdown of circ_0003633. C,D:CCK⁃8
and colony formation assays indicated that the proliferation ability of cells decreased after knockdown of circ_0003633. E:The migration ability of cells
*
**
decreased after knockdown of circ_0003633. P < 0.05,P < 0.01(n=3).
图3 敲低circ_0003633后对奥希替尼耐药细胞增殖、迁移及奥希替尼敏感性的影响
Figure 3 The effect of knockdown of circ_0003633 on the proliferation,migration and osimertinib sensitivity of osimertinib⁃
resistant cells

