LncRNA MAGI2-AS3 enhances cisplatin sensitivity of non-small cell lung cancer cells by regulating the miR-1269a/PTEN/AKT pathway

doi:10.12122/j.issn.1673-4254.2024.10.22

Abstract

Abstract:

Objective To investigate the mechanism mediating the regulatory effect of lncRNA MAGI2-AS3 on cisplatin (DDP) resistance in non-small cell lung cancer (NSCLC). Methods MAGI2-AS3 and miR-1269a expression levels were detected by qRT-PCR in DDP-sensitive lung cancer cell lines (A549 and H1299) and their resistant counterparts (A549/DDP and H1299/DDP). In A549 and H1299 cells with MAGI2-AS3 silencing and A549/DDP and H1299/DDP cells overexpressing MAGI2-AS3, the effects of 20 μmol/L DDP on cell viability and apoptosis were examined with CCK-8 assay, colony formation assay, flow cytometry and Western blotting, and the changes in epithelial-mesenchymal transition (EMT) were assessed with wound healing and Transwell assays. The interaction between MAGI2-AS3, miR-1269a and PTEN was predicted using GEPIA, StarBase and miRDB and verified with luciferase reporter gene assay and radioimmunoprecipitation (RIP) assay. A miR-1269a mimic and pcDNA3.1-PTEN plasmid were used to perform the rescue assay. Results MAGI2-AS3 expression was significantly downregulated in lung cancer tissues (P<0.05) in association with a poor prognosis (P<0.05). In the two DDP-resistant lung cancer cell lines, MAGI2-AS3 expression was significantly lowered as compared with the sensitive cells. Silencing MAGI2-AS3 significantly enhanced cell viability and promoted EMT of A549 and H1299 cells irrespective of DDP treatment, and also decreased DDP-induced apoptosis of the cells. In A549/DDP and H1299/DDP cells, MAGI2-AS3 overexpression strongly repressed cell viability and EMT irrespective of DDP treatment and promoted DDP-induced cell apoptosis. Luciferase reporter gene and RIP assays confirmed the binding of MAGI2-AS3 with miR-1269a and the binding of miR-1269a with 3 '-UTR domain of PTEN. The rescue assay demonstrated that MAGI2-AS3 acted as a sponge for miR-1269a to promote PTEN expression and downregulate AKT phosphorylation, thus inhibiting EMT and promoting DDP-induced apoptosis of A549/DDP cells. Conclusion MAGI2-AS3 enhances DDP sensitivity of NSCLC by targeted regulation of the miR-1269a/PTEN/AKT signaling axis.

Key words: long noncoding RNA MAGI2-AS3, miR-1269a, non-small cell lung cancer, cisplatin resistance

Xirui FAN, Zhilin QI, Yuanjie DENG, Zihan YANG, Li SUN, Guohao LI, Juanjuan LIANG, Fei WU, Liwen YUAN. LncRNA MAGI2-AS3 enhances cisplatin sensitivity of non-small cell lung cancer cells by regulating the miR-1269a/PTEN/AKT pathway[J]. Journal of Southern Medical University, 2024, 44(10): 2033-2043.

Figures/Tables 6

Tab.1 Primer sequence for qRT-PCR

Primer	Forward primers	Reverse primers
MAGI2-AS3	ACTGGAAATACAAGCCCAAGT	TTTCCACTCTGCTGGTTATGG
GAPDH	AGTCCACTGGCGTCTTCA	GAGTCCTTCCACGATACCAA
U6	TTATGGGTCCTAGCCTGAC	CACTATTGCGGGTCTGC
miR-1269a	GACTGAGCCGTGCTACTGG	TGTCGTGGAGTCGGCAATTG
PTEN	GTCAGAGGCGCTATGTGTATTA	TTAGCTGGCAGACCACAA

Fig.1 Expression of MAGI2-AS3 in cisplatin-resistant NSCLC cell lines. A: qRT-PCR of MAGI2-AS3 in NSCLC cell lines A549, H1299, and HCC827 and in normal human lung epithelial cells (BEAS-2B). B: MAGI2-AS3 expression levels in LUAD tissues and normal adjacent tissues from the GEPIA database. C: Survival analysis of LUAD patients with high and low MAGI2-AS3 expressions. D, E: qRT-PCR of MAGI2-AS3 in cisplatin-sensitive A549 and H1299 cells and cisplatin-resistant A549/DDP and H1299/DDP cells. *P<0.05, **P<0.01, ***P<0.001.

Fig.2 MAGI2-AS3 overexpression enhances cisplatin sensitivity of non-small cell lung cancer cells. A, B, E, F: MAGI2-AS3 expressions in A549/DDP, A549, H1299/DDP and H1299 cells detected by qRT-PCR (**P<0.01, ***P<0.005 vs NC group). C, D, G, H: Viability of A549/DDP, A549, H1299/DDP and H1299 cells detected by CCK8 assay (#P<0.05, ###P<0.001 vs OE-NC group; &&&P<0.001 vs sh-NC group; **P<0.01, ***P<0.001). I, J: Viability of A549/DDP and A549 cells assessed by clone formation assay (#P<0.05 vs OE-NC group; &&&P<0.005 vs sh-NC group; **P<0.01, ***P<0.001). K, L: Apoptosis rates of A549/DDP, A549, H1299/DDP and H1299 cells detected by flow cytometry (###P<0.001 vs OE-NC group; &&&P<0.001 vs sh-NC group; **P<0.01, ***P<0.001). M-P: Western blotting for detecting Bax, Bcl-2, cleaved caspase3 protein expressions (**P<0.01, ***P<0.001 vs OE-NC group; ##P<0.01, ###P<0.001).

Fig.3 MAGI2-AS3 overexpression inhibits EMT progression of NSCLC cells. A-D: Migration ability of A549, A549/DDP, H1299, and H1299/DDP cells assessed by wound healing assay (Scale bar=100 μm). E-H: Quantitation of the results of wound healing assay (**P<0.01, ***P<0.001 vs NC group; ##P<0.01, ###P<0.001). I, J: Invasion ability of A549 and A549/DDP assessed by Transwell assay (Scale bar=100 μm; *P<0.05, **P<0.01, ***P<0.001 vs NC group; ##P<0.01). K-N: Western blotting for detecting N-cadherin, E-cadherin, and vimentin protein expressions (**P<0.01, ***P<0.001 vs OE-NC group; ###P<0.001).

Fig.4 MAGI2-AS3 enhances cisplatin sensitivity of A549/DDP cells by targeted adsorption of miR-1269a. A: qRT-PCR of MAGI2-AS3 expression in the nuclear and cytoplasmic fractions of A549/DDP cells. B: Schematic diagram showing the predicted wild-type and mutated binding sites for miR-1269a in MAGI2-AS3. C: qRT-PCR of miR-1269a expression in A549 and A549/DDP cells (**P<0.01). D: qRT-PCR of miR-1269a expression in A549/DDP and A549 cells with MAGI2-AS3 overexpression or knockdown (**P<0.01 vs OE-NC group; ##P<0.01 vs sh-NC group). E, F: qRT-PCR of MAGI2-AS3 and miR-1269a in A549/DDP cells treated with anti-AGO2 antibody in RIP assay (***P<0.001 vs IgG group). G: qRT-PCR of miR-1269a expression in A549/DDP cells transfected with the control mimic (NC) or miR-1269a mimic (**P<0.01). H: Luciferase activity of the reporter construct containing the wild-type or miR-1269a binding site mutant of MAGI2-AS3 (**P<0.01 vs mimic NC). I: qRT-PCR of miR-1269a in A549/DDP cells (**P<0.01). J: Transwell assay for assessing invasion ability of A549/DDP cells (Scale bar=100 μm; **P<0.01). K: Apoptosis rate of A549/DDP cells detected by flow cytometry (**P<0.01).

Fig.5 MAGI2-AS3 overexpression enhances cisplatin sensitivity of NSCLC cells by targeting the miR-1269a/PTEN/AKT pathway. A: Schematic diagram showing the predicted wild-type and mutated binding sites between PTEN mRNA sequence and miR-1269a sequence. B: Spearman correlation analysis of MAGI2-AS3 and PTEN expression levels in LUAD tissues.C: Luciferase activity of the reporter construct containing the wild-type or mutant 3′UTR sequence of PTEN (***P<0.001 vs mimic NC group). D, E: PTEN mRNA and protein expression levels in A549/DDP cells (***P<0.001). F: qRT-PCR for detecting PTEN mRNA expression (**P<0.01). G: Western blotting for detecting expression levels of PTEN, p-AKT, AKT, E-cadherin, N-cadherin, and cleaved caspase-3 in A549/DDP cells. H: Transwell assay for assessing A549/DDP cell invasion ability (Scale bar=100 μm; ***P<0.001). I: Apoptosis rate of A549/DDP cells detected by flow cytometry (**P<0.01, ***P<0.001).

References 25

1	Sung H, Ferlay J, Siegel RL, et al. Global cancer statistics 2020: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries[J]. CA Cancer J Clin, 2021, 71(3): 209-49.
2	Herbst RS, Morgensztern D, Boshoff C. The biology and management of non-small cell lung cancer[J]. Nature, 2018, 553(7689): 446-54.
3	Pan XF, Chen Y, Shen YZ, et al. Knockdown of TRIM65 inhibits autophagy and cisplatin resistance in A549/DDP cells by regulating miR-138-5p/ATG7[J]. Cell Death Dis, 2019, 10(6): 429.
4	Kryczka J, Kryczka J, Czarnecka-Chrebelska KH, et al. Molecular mechanisms of chemoresistance induced by cisplatin in NSCLC cancer therapy[J]. Int J Mol Sci, 2021, 22(16): 8885.
5	Lin J, Liao SS, Liu ZW, et al. LncRNA FGD5-AS1 accelerates cell proliferation in pancreatic cancer by regulating miR-520a-3p/KIAA1522 axis[J]. Cancer Biol Ther, 2021, 22(3): 257-66.
6	Peng Y, Tang DH, Zhao M, et al. Long non-coding RNA: a recently accentuated molecule in chemoresistance in cancer[J]. Cancer Metastasis Rev, 2020, 39(3): 825-35.
7	Zeng ZL, Zhao GF, Zhu HK, et al. LncRNA FOXD3-AS1 promoted chemo-resistance of NSCLC cells via directly acting on miR-127-3p/MDM2 axis[J]. Cancer Cell Int, 2020, 20: 350.
8	Tao XY, Li Y, Fan SQ, et al. Downregulation of Linc00173 increases BCL2 mRNA stability via the miR-1275/PROCA1/ZFP36L2 axis and induces acquired cisplatin resistance of lung adenocarcinoma[J]. J Exp Clin Cancer Res, 2023, 42(1): 12.
9	Jiao PF, Hou JN, Yao MY, et al. SNHG14 silencing suppresses the progression and promotes cisplatin sensitivity in non-small cell lung cancer[J]. Biomedecine Pharmacother, 2019, 117: 109164.
10	Liu KX, Cheng C, Li R, et al. Roles of lncRNA MAGI2-AS3 in human cancers[J]. Biomedecine Pharmacother, 2021, 141: 111812.
11	Yin Z, Ma TT, Yan JH, et al. LncRNA MAGI2-AS3 inhibits hepatocellular carcinoma cell proliferation and migration by targeting the miR-374b-5p/SMG1 signaling pathway[J]. J Cell Physiol, 2019, 234(10): 18825-36.
12	Yang G, Li T, Liu JY, et al. lncRNA MAGI2-AS3 suppresses castration-resistant prostate cancer proliferation and migration via the miR-106a-5p/RAB31 axis[J]. Genomics, 2023, 115(2): 110599.
13	Yang RW, Chen ZD, Ao S, et al. LncRNA MAGI2-AS3 inhibites tumor progression by up-regulating STAM via interacting with miR-142-3p in clear cell renal cell carcinoma[J]. Cell Signal, 2024, 113: 110954.
14	Luo J, Yao JF, Deng XF, et al. 14, 15-EET induces breast cancer cell EMT and cisplatin resistance by up-regulating integrin αvβ3 and activating FAK/PI3K/AKT signaling[J]. J Exp Clin Cancer Res, 2018, 37(1): 23.
15	Han ML, Zhao YF, Tan CH, et al. Cathepsin L upregulation-induced EMT phenotype is associated with the acquisition of cisplatin or paclitaxel resistance in A549 cells[J]. Acta Pharmacol Sin, 2016, 37(12): 1606-22.
16	Ashrafizadeh M, Zarrabi A, Hushmandi K, et al. Association of the epithelial-mesenchymal transition (EMT) with cisplatin resistance[J]. Int J Mol Sci, 2020, 21(11): 4002.
17	Wang F, Zu YW, Zhu SB, et al. Long noncoding RNA MAGI2-AS3 regulates CCDC19 expression by sponging miR-15b-5p and suppresses bladder cancer progression[J]. Biochem Biophys Res Commun, 2018, 507(1/2/3/4): 231-5.
18	Bu PC, Wang LH, Chen KY, et al. MiR-1269 promotes metastasis and forms a positive feedback loop with TGF-Β[J]. Nat Commun, 2015, 6: 6879.
19	Guo CX, Shi HM, Shang YL, et al. LncRNA LINC00261 overexpression suppresses the growth and metastasis of lung cancer via regulating miR-1269a/FOXO1 axis[J]. Cancer Cell Int, 2020, 20: 275.
20	Haddadi N, Lin YG, Travis G, et al. PTEN/PTENP1: 'Regulating the regulator of RTK-dependent PI3K/Akt signalling', new targets for cancer therapy[J]. Mol Cancer, 2018, 17(1): 37.
21	Worby CA, Dixon JE. PTEN[J]. Annu Rev Biochem, 2014, 83: 641-69.
22	张雨, 陆红玲, 徐刚. PI3K/AKT通路在非小细胞肺癌顺铂耐药中的作用[J]. 中国肺癌杂志, 2014, 17(8): 635-42.
23	Shi L, Zhu WL, Huang YY, et al. Cancer-associated fibroblast-derived exosomal microRNA-20a suppresses the PTEN/PI3K-AKT pathway to promote the progression and chemoresistance of non-small cell lung cancer[J]. Clin Transl Med, 2022, 12(7): e989.
24	Sun BT, Hu NJ, Cong D, et al. MicroRNA-25-3p promotes cisplatin resistance in Non-small-cell lung carcinoma (NSCLC) through adjusting PTEN/PI3K/AKT route[J]. Bioengineered, 2021, 12(1): 3219-28.
25	Xing SJ, Qu Y, Li CY, et al. Deregulation of lncRNA-AC078883.3 and microRNA-19a is involved in the development of chemoresistance to cisplatin via modulating signaling pathway of PTEN/AKT[J]. J Cell Physiol, 2019, 234(12): 22657-65.

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