Li Juan, Zhao Hongwei
The Affiliated Stomatological Hospital of Chongqing Medical University, 426 Songshi North Road, Longshan Street, Yubei District, Chongqing, 401147, China.
Chongqing Key Laboratory of Oral Diseases, Chongqing, 401147, China.
J Mol Histol. 2025 Jul 9;56(4):224. doi: 10.1007/s10735-025-10504-5.
miR-429 is a tumor suppressor that has been observed in various cancers. The exact mechanism by which miR-429 affects salivary adenoid cystic carcinoma(SACC) is not fully understood. Initially, the expression of miR-429 and zinc finger E-box-binding homeobox 1 (ZEB1) in tumor tissues and matched adjacent non-tumor tissues of SACC patients were inspected by quantitative real-time polymerase chain reaction. Next, CCK-8, wound healing, transwell, and dorsal root ganglion (DRG) co-culture models were used to explore the effects of miR-429 on SACC cell proliferation, migration, invasion, and perineural invasion (PNI). Finally, the downstream target genes of miR-429 were screened and validated through bioinformatics analysis and dual-luciferase reporter analysis, and the regulatory role of miR-429 on epithelial-mesenchymal transition (EMT) in SACC cells was explored. miR-429 was poorly expressed while ZEB1 was substantially expressed in SACC tumor tissues. Elevated levels of miR-429 led to a significant suppression of SACC cell of proliferation, migration, invasion, and PNI. ZEB1 was screened and validated as a downstream target gene of miR-429. High concentrations of miR-429 also markedly lowered the expression of ZEB1 in SACC cells, thereby inhibiting EMT. These results suggest that miR-429 is lowly expressed in SACC, may suppress progression and metastasis of SACC cells, and is associated with ZEB1 and the EMT pathway.
miR-429是一种在多种癌症中都有发现的肿瘤抑制因子。miR-429影响涎腺腺样囊性癌(SACC)的确切机制尚未完全明确。首先,通过定量实时聚合酶链反应检测SACC患者肿瘤组织及配对的相邻非肿瘤组织中miR-429和锌指E盒结合同源框1(ZEB1)的表达。接下来,使用CCK-8、伤口愈合、Transwell和背根神经节(DRG)共培养模型,探讨miR-429对SACC细胞增殖、迁移、侵袭和神经周围侵袭(PNI)的影响。最后,通过生物信息学分析和双荧光素酶报告基因分析筛选并验证miR-429的下游靶基因,并探讨miR-429对SACC细胞上皮-间质转化(EMT)的调控作用。在SACC肿瘤组织中,miR-429表达较低而ZEB1大量表达。miR-429水平升高导致SACC细胞的增殖、迁移、侵袭和PNI受到显著抑制。ZEB1被筛选并验证为miR-4家族成员29的下游靶基因。高浓度的miR-429也显著降低了SACC细胞中ZEB1的表达,从而抑制EMT。这些结果表明,miR-429在SACC中低表达,可能抑制SACC细胞的进展和转移,并且与ZEB1和EMT途径相关。