The delay in wound healing caused by chronic wounds or pathological scars is a pressing issue in clinical practice, imposing significant economic and psychological burdens on patients. In particular, with the aging of the population and the increasing incidence of diseases such as diabetes, impaired wound healing is one of the growing health problems. MicroRNA (miRNA) plays a crucial role in wound healing and regulates various biological processes. Our results show that miR-618 was significantly upregulated during the inflammatory phase of wound healing.Subsequently, miR-618 promotes the secretion of pro-inflammatory cytokines and regulates the proliferation and migration of keratinocytes. Mechanistically, miR-618 binds to the target gene-Atp11b and inhibits the PI3K-Akt signaling pathway, inhibiting the epithelial-mesenchymal transition (EMT) of keratinocytes. In addition, the PI3K-Akt signaling pathway induces the enrichment of nuclear miR-618, and miR-618 binds to the promoter of Lin7a to regulate gene transcription. Intradermal injection of miR-618 antagomir around full-thickness wounds in peridermal mice effectively accelerates wound closure compared to control. In conclusion, miR-618 antagomir can be a potential therapeutic agent for wound healing.

BACKGROUND: Publications reveal different outcomes achieved by genetically knocking out a long non-coding microRNA-host-gene (lncMIRHG) versus the administration of pharma-cologic antagomirs specifically targeting the guide strand of such intragenic microRNA. This suggests that lncMIRHGs may perform diverse functions unrelated to their role as intragenic miRNA precursors.
OBJECTIVE: This review synthesizes in silico, in vitro, and in vivo findings from our lab and others to compare the effects of knocking out the long non-coding RNA MIR22HG, which hosts miR-22, versus administering pharmacological antagomirs targeting miR-22-3p.
METHODS: In silico analyses at the gene, pathway, and network levels reveal both distinct and overlapping targets of hsa-miR-22-3p and its host gene, MIR22HG. While pharmacological an-tagomirs targeting miR-22-3p consistently improve various metabolic parameters in cell culture and animal models across multiple studies, genetic knockout of MIR22HG yields inconsistent results among different research groups.
RESULTS: Additionally, MIR22HG functions as a circulating endogenous RNA (ceRNA) or \"sponge\" that simultaneously modulates multiple miRNA-mRNA interactions by competing for binding to several miRNAs.
CONCLUSIONS: From a therapeutic viewpoint, genetic inactivation of a lncMIRHG and pharmaco-logic antagonism of the guide strand of its related intragenic miRNA produce different results. This should be expected as lncMIRHGs play dual roles, both as lncRNA and as a source for primary miRNA transcripts.

OBJECTIVE: The study aimed to identify a quantitative signature of circulating small non-coding RNAs (sncRNAs) as a biomarker for pulmonary tuberculosis disease (active-TB/ATB) and explore their regulatory roles in host-pathogen interactions and disease progression.
METHODS: We conducted a cross-sectional study recruiting subjects diagnosed with active-TB (drug-sensitive and drug-resistant) and healthy controls. Sera samples were collected and utilized for preparing small RNA libraries. Quantitative patterns of circulating sncRNAs (miRNAs, piRNAs and tRFs) were identified via high-throughput sequencing and DeSeq2 analysis and validated in independent active-TB cohorts. Functional knockdown for two selected miRNAs were also performed.
RESULTS: A diagnostic signature of four sncRNAs for both drug-sensitive and drug-resistant active-TB cases was validated, exhibiting an AUC of 0.96 (95% CI: 0.937-0.996, p < 0.001) with 86.7% sensitivity (95% CI: 0.775-0.932) and 91.7% specificity (95% CI: 0.730-0.990) in ROC analysis. Functional knockdown demonstrated regulatory roles of hsa-miR-223-5p and hsa-miR-10b-5p in Mycobacterium tuberculosis (Mtb) growth and pro-inflammatory cytokine expression (IL-6 and IL-8).
CONCLUSIONS: The study identified a diagnostic tool utilizing a signature of four sncRNAs with high specificity and sensitivity, enhancing our understanding of sncRNAs as ATB diagnostic biomarker. Additionally, hsa-miR-223-5p and hsa-miR-10b-5p demonstrated potential roles in Mtb pathogenesis and host-response to infection.

Neuroinflammation and accumulation of Amyloid Beta (Aβ) accompanied by deterioration of special memory are hallmarks of Alzheimer\'s disease (AD). Effective preventative and treatment options for AD are still needed. Microglia in AD brains are characterized by elevated levels of microRNA-17 (miR-17), which is accompanied by defective autophagy, Aβ accumulation, and increased inflammatory cytokine production. However, the effect of targeting miR-17 on AD pathology and memory loss is not clear. To specifically inhibit miR-17 in microglia, we generated mannose-coated lipid nanoparticles (MLNPs) enclosing miR-17 antagomir (Anti-17 MLNPs), which are targeted to mannose receptors readily expressed on microglia. We used a 5XFAD mouse model (AD) that recapitulates many AD-related phenotypes observed in humans. Our results show that Anti-17 MLNPs, delivered to 5XFAD mice by intra-cisterna magna injection, specifically deliver Anti-17 to microglia. Anti-17 MLNPs downregulated miR-17 expression in microglia but not in neurons, astrocytes, and oligodendrocytes. Anti-17 MLNPs attenuated inflammation, improved autophagy, and reduced Aβ burdens in the brains. Additionally, Anti-17 MLNPs reduced the deterioration in spatial memory and decreased anxiety-like behavior in 5XFAD mice. Therefore, targeting miR-17 using MLNPs is a viable strategy to prevent several AD pathologies. This selective targeting strategy delivers specific agents to microglia without the adverse off-target effects on other cell types. Additionally, this approach can be used to deliver other molecules to microglia and other immune cells in other organs.

BACKGROUND: Viral myocarditis (VMC) is a disease resulting from viral infection, which manifests as inflammation of myocardial cells. Until now, the treatment of VMC is still a great challenge for clinicians. Increasing studies indicate the participation of miR-29b-3p in various diseases. According to the transcriptome sequencing analysis, miR-29b-3p was markedly upregulated in the viral myocarditis model. The purpose of this study was to investigate the role of miR-29b-3p in the progression of VMC.
METHODS: We used CVB3 to induce primary cardiomyocytes and mice to establish a model of viral myocarditis. The purity of primary cardiomyocytes was identified by immunofluorescence. The cardiac function of mice was detected by Vevo770 imaging system. The area of inflammatory infiltration in heart tissue was shown by hematoxylin and eosin (H&E) staining. The expression of miR-29b-3p and DNMT3A was detected by quantitative real time polymerase chain reaction (qRT-PCR). The expression of a series of pyroptosis-related proteins was detected by western blot. The role of miR-29b-3p/DNMT3A in CVB3-induced pyroptosis of cardiomyocytes was studied in this research.
RESULTS: Our data showed that the expression of miR-29b-3p was upregulated in CVB3-induced cardiomyocytes and heart tissues in mice. To explore the function of miR-29b-3p in CVB3-induced VMC, we conducted in vivo experiments by knocking down the expression of miR-29b-3p using antagomir. We then assessed the effects on mice body weight, histopathology changes, myocardial function, and cell pyroptosis in heart tissues. Additionally, we performed gain/loss-of-function experiments in vitro to measure the levels of pyroptosis in primary cardiomyocytes. Through bioinformatic analysis, we identified DNA methyltransferases 3A (DNMT3A) as a potential target gene of miR-29b-3p. Furthermore, we found that the expression of DNMT3A can be modulated by miR-29b-3p during CVB3 infection.
CONCLUSIONS: Our results demonstrate a correlation between the expression of DNMT3A and CVB3-induced pyroptosis in cardiomyocytes. These findings unveil a previously unidentified mechanism by which CVB3 induces cardiac injury through the regulation of miR-29b-3p/DNMT3A-mediated pyroptosis.

OBJECTIVE: Trigeminal neuralgia (TN) is a common neuropathic pain. Voltage-gated potassium channel (Kv) has been confirmed to be involved in the occurrence and development of TN, but the specific mechanism is still unclear. MicroRNA may be involved in neuropathic pain by regulating the expression of Kv channels and neuronal excitability in trigeminal ganglion (TG). This study aims to explore the relationship between Kv1.1 and miR-21-5p in TG with a TN model, evaluate whether miR-21-5p has a regulatory effect on Kv1.1, and to provide a new target and experimental basis for the treatment of TN.
METHODS: A total of 48 SD rats were randomly divided into 6 groups: 1) a sham group (n=12), the rats were only sutured at the surgical incision without nerve ligation; 2) a sham+agomir NC group (n=6), the sham rats were microinjected with agomir NC through stereotactic brain injection in the surgical side of TG; 3) a sham+miR-21-5p agomir group (n=6), the sham rats were microinjected with miR-21-5p agomir via stereotactic brain injection in the surgical side of TG; 4) a TN group (n=12), a TN rat model was constructed using the chronic constriction injury of the distal infraorbital nerve (dIoN-CCI) method with chromium intestinal thread; 5) a TN+antagonist NC group (n=6), TN rats were microinjected with antagonist NC through stereotactic brain injection method in the surgical side of TG; 6) a TN+miR-21-5p antagonist group (n=6), TN rats were microinjected with miR-21-5p antagonist through stereotactic brain injection in the surgical side of TG. The change of mechanical pain threshold in rats of each group after surgery was detected. The expressions of Kv1.1 and miR-21-5p in the operative TG of rats were detected by Western blotting and real-time reverse transcription polymerase chain reaction. Dual luciferase reporter genes were used to determine whether there was a target relationship between Kv1.1 and miR-21-5p and whether miR-21-5p directly affected the 3\'-UTR terminal of KCNA1. The effect of brain stereotaxic injection was evaluated by immunofluorescence assay, and then the analogue of miR-21-5p (agomir) and agomir NC were injected into the TG of rats in the sham group by brain stereotaxic apparatus to overexpress miR-21-5p. The miR-21-5p inhibitor (antagomir) and antagomir NC were injected into TG of rats in the TN group to inhibit the expression of miR-21-5p. The behavioral changes of rats before and after administration were observed, and the expression changes of miR-21-5p and Kv1.1 in TG of rats after intervention were detected.
RESULTS: Compared with the baseline pain threshold, the facial mechanical pain threshold of rats in the TN group was significantly decreased from the 5th to 15th day after the surgery (P<0.05), and the facial mechanical pain threshold of rats in the sham group was stable at the normal level, which proved that the dIoN-CCI model was successfully constructed. Compared with the sham group, the expression of Kv1.1 mRNA and protein in TG of the TN group was down-regulated (both P<0.05), and the expression of miR-21-5p was up-regulated (P<0.05). The results of dual luciferase report showed that the luciferase activity of rno-miR-21-5p mimics and KCNA1 WT transfected with 6 nmol/L or 20 nmol/L were significantly decreased compared with those transfected with mimic NC and wild-type KCNA1 WT, respectively (P<0.001). Compared with low dose rno-miR-21-5p mimics (6 nmol/L) co-transfection group, the relative activity of luciferase in the high dose rno-miR-21-5p mimics (20 nmol/L) cotransfection group was significantly decreased (P<0.001). The results of immunofluorescence showed that drugs were accurately injected into TG through stereotaxic brain. After the expression of miR-21-5p in the TN group, the mechanical pain threshold and the expression of Kv1.1 mRNA and protein in TG were increased. After overexpression of miR-21-5p in the sham group, the mechanical pain threshold and the expression of Kv1.1 mRNA and protein in TG were decreased.
CONCLUSIONS: Both Kv1.1 and miR-21-5p are involved in TN and miR-21-5p can regulate Kv1.1 expression by binding to the 3\'-UTR of KCNA1.
目的: 三叉神经痛(trigeminal neuralgia，TN)是一种临床上常见的神经病理性疼痛。电压门控性钾通道(voltage-gated potassium channel，Kv)已被证实参与TN的发生、发展，但具体机制仍不明确。微RNA(microRNA，miR)可通过调节三叉神经节(trigeminal ganglion，TG)上Kv通道的表达及神经元兴奋性，参与神经病理性疼痛。本研究旨在探索TN模型中TG上Kv1.1和miR-21-5p的关系，评估miR-21-5p是否对Kv1.1有调控作用，为TN的治疗提供新的靶点。方法: 将48只SD大鼠随机分为6组：1)假手术组(sham组，n=12)，大鼠仅在术侧切口缝合，不结扎神经；2)Sham+agomir NC组(n=6)，sham大鼠通过脑立体定位注射方法于术侧TG微量注射agomir NC；3)Sham+miR-21-5p agomir 组(n=6)，sham大鼠通过脑立体定位注射方法于术侧TG微量注射miR-21-5p agomir；4)TN组(n=12)，采用铬肠线慢性缩窄性眶下远端神经损伤(chronic constriction injury of the distal infraorbital nerve，dIoN-CCI)法构建TN大鼠模型；5)TN+antagomir NC组(n=6)，TN大鼠通过脑立体定位注射方法于术侧TG微量注射antagomir NC；6)TN+miR-21-5p antagomir组(n=6)，TN大鼠通过脑立体定位注射方法于术侧TG微量注射miR-21-5p antagomir。检测术后各组大鼠面部机械痛阈变化。采用蛋白质印迹法和实时反转录聚合酶链反应检测术后大鼠术侧TG中Kv1.1和miR-21-5p的表达情况。利用双荧光素酶报告基因确定Kv1.1和miR-21-5p是否存在靶标关系，即miR-21-5p是否可以直接影响KCNA1的3\'端非翻译区(3\'-untranslated region，3\'-UTR)。通过免疫荧光法测定，对脑立体定位注射的效果进行评价，随后分别将miR-21-5p的类似物(agomir)和agomir NC通过脑立体定位仪注射至sham组大鼠TG内，使miR-21-5p过表达；向TN组大鼠TG内分别注射miR-21-5p的抑制剂(antagomir)和antagomir NC，抑制miR-21-5p表达。观察给药前后大鼠行为学变化，检测干预后大鼠TG内miR-21-5p和Kv1.1表达的变化。结果: 与基础痛阈值相比，TN组大鼠在术后第5至15天，面部机械痛阈值显著降低(P<0.05)，sham组大鼠面部机械痛阈值稳定在正常水平，证明dIoN-CCI模型构建成功。与sham组相比，TN组TG中Kv1.1 mRNA和蛋白质表达均下调(均P<0.05)，miR-21-5p的表达上调 (P<0.05)。双荧光素酶报告结果显示：与转染mimic NC和野生型KCNA1(KCNA1 WT)组相比，共转染6 nmol/L或 20 nmol/L的rno-miR-21-5p mimics的KCNA1 WT组的荧光素酶活性显著降低(P<0.001)；与6 nmol/L rno-miR-21-5p mimics共转染组相比，较大剂量(20 nmol/L)的rno-miR-21-5p mimics共转染组的荧光素酶相对活性显著降低(P<0.001)。免疫荧光法结果显示通过脑立体定位可以将药物准确注入TG。TN组抑制miR-21-5p表达后，大鼠面部机械痛阈升高，TG中Kv1.1 mRNA及蛋白质的表达水平升高；sham组过表达miR-21-5p后，大鼠面部机械痛阈降低，TG中Kv1.1 mRNA及蛋白质的表达降低。结论: Kv1.1和miR-21-5p均参与TN的发生、发展，miR-21-5p可以通过结合KCNA1 3\'-UTR来调控Kv1.1的表达，进而影响TN。.

OBJECTIVE: This study aimed to determine the influence of miR-1297 on kidney injury in rats with diabetic nephropathy (DN) and its causal role.
METHODS: A DN rat model was established through right kidney resection and intraperitoneal injection of streptozotocin (STZ). Sham rats did not undergo right kidney resection or STZ injection. The DN rats were divided into the DN model and antagomiR-1297 treatment groups. Kidney morphology was observed using hematoxylin and eosin staining. Renal function indices, including blood urea nitrogen (BUN), serum creatinine (SCr), and urinary protein, were measured using kits. Levels of tumor necrosis factor-α (TNF-α), interleukin (IL)-6, IL-1β, superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px) were determined through enzyme-linked immunosorbent assay (ELISA). Fibrin (FN), collagen type I (Col I), and α-smooth muscle actin (α-SMA) were assessed through western blotting and real-time reverse transcription-polymerase chain reaction. Apoptosis was detected using terminal deoxynucleotidyl transferase dUTP nick end labeling staining. miR-1297 targets were predicted using bioinformatic software and verified through luciferase reporter assay. Phosphatase and tensin homolog deleted on chromosome 10 (PTEN)/phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT) pathway expression was analyzed through western blotting.
RESULTS: AntagomiR-1297 reduced BUN (p = 0.005), SCr (p = 0.012), and urine protein (p < 0.001) levels and improved kidney tissue morphology. It prevented renal interstitial fibrosis by decreasing FN, Col I, and α-SMA protein levels (all p < 0.001). AntagomiR-1297 increased SOD (p = 0.001) and GSH-Px (p = 0.002) levels. Additionally, it reduced levels of cell inflammatory factors, including TNF-α, IL-6, and IL-1β (all p < 0.001), and alleviated apoptosis (p < 0.001) in rat kidney tissue with DN. miR-1297 was pinpointed as a target for PTEN. AntagomiR-1297 increased PTEN expression and suppressed PI3K and AKT phosphorylation (all p < 0.001).
CONCLUSIONS: AntagomiR-1297 can mitigate renal fibrosis, renal inflammation, apoptosis, and oxidative stress levels through the PTEN/PI3K/AKT pathway.

Acute liver failure (ALF) is a complex syndrome characterized by overactivation of innate immunity, and the recruitment and differentiation of immune cells at inflammatory sites. The present study aimed to explore the role of microRNA (miRNA/miR)‑21 and its potential mechanisms underlying inflammatory responses in ALF. Baseline serum miR‑21 was analyzed in patients with ALF and healthy controls. In addition, miR‑21 antagomir was injected via the tail vein into C57BL/6 mice, and lipopolysaccharide/D‑galactosamine (LPS/GalN) was injected into mice after 48 h. The expression levels of miR‑21, Krüppel‑like‑factor‑6 (KLF6), autophagy‑related proteins and interleukin (IL)‑23, and hepatic pathology were then assessed in the liver tissue. Furthermore, THP‑1‑derived macrophages were transfected with a miRNA negative control, miR‑21 inhibitor, miR‑21 mimics or KLF6 overexpression plasmid, followed by treatment with or without rapamycin, and the expression levels of miR‑21, KLF6, autophagy‑related proteins and IL‑23 were evaluated. The results revealed that baseline serum miR‑21 levels were significantly upregulated in patients with ALF. In addition, LPS/GalN‑induced ALF was attenuated in the antagomir‑21 mouse group. KLF6 was identified as a target of miR‑21‑5p with one putative seed match site identified by TargetScan. A subsequent luciferase activity assay demonstrated a direct interaction between miR‑21‑5p and the 3\'‑UTR of KLF6 mRNA. Further experiments suggested that miR‑21 promoted the expression of IL‑23 via inhibiting KLF6, which regulated autophagy. In conclusion, in the present study, baseline serum miR‑21 levels were highly upregulated in patients with ALF, antagomir‑21 attenuated LPS/GalN‑induced ALF in a mouse model, and miR‑21 could promote the expression of IL‑23 via inhibiting KLF6.

OBJECTIVE: To explore the molecular mechanism of circ_0000326 regulating proliferation, invasion and migration of oral squamous cell carcinoma HSC3 cells.
METHODS: Cancerous tissue and adjacent tissue specimens of 45 patients with oral squamous cell carcinoma (OSCC) admitted to the Second People\'s Hospital of Hefei from March 2020 to June 2021 were collected. qRT-PCR was used to detect the expression levels of circ_0000326 and miR-567. CCK-8, plate clone formation test, scratch test and Transwell test were used to detect cell proliferation, clone formation, migration and invasion. Dual luciferase reporter experiment was used to detect the targeting relationship between circ_0000326 and miR-567. Western blot was used to quantify E-cadherin and N-cadherin protein. SPSS 21.0 software package was used for statistical analysis.
RESULTS: circ_0000326 expression was 4.01±0.29 in OSCC and 1.00±0.13 in paracancerous tissues, while miR-567 expression was 0.28±0.03 and 1.00±0.10, respectively, with significant differences. Compared with the si-NC group, the cell viability and the number of cell clones in the si-circ_0000326 group were significantly decreased(P＜0.05). Compared with the si-NC group, the number of invasive cells and scratch healing rate in the si-circ_0000326 group were significantly decreased (P＜0.05), the expression level of E-cadherin protein was significantly increased (P＜0.05), and the expression level of N-cadherin protein was significantly decreased(P＜0.05). Additionally, circ_0000326 targeted miR-567. miR-567 expression was 1.00±0.00 in pcDNA group, 0.44±0.04 in pcDNA-circ_0000326 group, 0.99±0.06 in si-NC group, and 2.92±0.25 in si-circ_0000326 group with significant differences. Compared with miR-NC group, the cell viability, scratch healing rate, the number of cell clones and the number of invasive cells of miR-567 group were decreased, while E-cadherin protein level was increased(P＜0.05). Compared with si-circ_0000326+anti-miR-NC group, the cell viability, scratch healing rate, N-cadherin protein level, the number of cell clones and the number of invasive cells of si-circ_0000326+anti-miR-567 group were increased(P＜0.05), while E-cadherin protein level was decreased(P＜0.05).
CONCLUSIONS: Interference with the expression of circ_0000326 could reduce the ability of OSCC cell proliferation, colony formation, migration and invasion by promoting the expression of miR-567.

Objective: To explore the molecular mechanism of circDDX17 regulating the proliferation and apoptosis of non-small cell lung cancer cells by targeting the miR-223-3p/RIP3 molecular axis. Methods: The expression levels of circDDX17, miR-223-3p, and RIP3 in human normal lung epithelial cell lines BEAS-2B and non-small cell lung cancer cells H1299, A549, and H446 were detected by reverse transcription-quantitative real-time polymerase chain reaction (RT-qPCR). The plasmids of pcDNA, pcDNA-circDDX17, anti-miR-con, anti-miR-223-3p, pcDNA-circDDX17 and miR-con, pcDNA-circDDX17 and miR-223-3p mimics were transfected into H1299 cells. 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H tetrazolium bromide (MTT) assay was used to detect the cell proliferation. Flow cytometry was used to detect the cell cycle and cell apoptosis. Plate cloning experiment was used to detect cell proliferation ability. The dual luciferase report experiment was applied to verify the targeting relationship between miR-223-3p with circDDX17 and RIP3. Western blot was used to detect the protein expression of cyclinD1, CDK2, cleaved caspase-3 and Bax. Results: The expression levels of circDDX17 and RIP3 mRNA in H1299, A549, and H446 cells were significantly reduced (P<0.05), the expression level of miR-223-3p mRNA was significantly increased (P<0.05) compared with BEAS-2B. The cell viability [(69.46±4.68)%], the number of cell clones (83.49±7.86), the proportion of cells in S phase [(22.52±1.41) %], the protein expression levels of cyclinD1 and CDK2 in PCDNa-CircDDX17 group were lower than those in pcDNA group [(97.54±7.72)%, 205.03±13.37, (28.69±1.49)%, respectively, P<0.05], while the percentage of G0/G1 phase cells [(64.45±3.56)%], apoptosis rate [(18.36±1.63)%], the protein expression levels of cleaved caspase-3 and Bax in pcDNA-circDDX17 group were higher than those of pcDNA group [(51.33±2.76) % and (5.21±0.54) %, respectively, P<0.05]. The viability [(72.64±5.44)%], the number of cell clones (78.16±8.23), the proportion of S-stage cells [(21.34±1.59) %], the protein expression levels of CyclinD1 and CDK2 in anti-miR-223-3p group were lower than those in anti-miR-con group [(103.47±6.25)%, 169.32±14.53, (28.43±1.26)%, respectively, P<0.05]. Percentage of G0/G1 phase cells [(62.86±3.28)%], apoptosis rate [(14.64±1.67)%], the protein expression levels of cleaved caspase-3 and Bax in the anti-miR-223-3p group were higher than those of anti-miR-con group [(51.33±2.71)% and (4.83±0.39)%, respectively, P<0.05]. MiR-223-3p has complementary sites with circDDX17 or RIP3. The viability [(135.45±9.28)%], the number of cell clones (174.64±10.68), the proportion of S-phase cells [(26.39±2.25)%], the protein expression levels of cyclinD1 and CDK2 in pcDNA-circDDX17+miR-223-3p group were higher than those in pcDNA-circDDX17+miR-con group [(101.56±6.68)%, 107.65±7.62, (21.64±1.72)%, P<0.05]. Percentage of G0/G1 phase cells [(56.64±2.76)%], apoptosis rate [(8.34±0.76)%], the protein expression levels of cleaved caspase-3 and Bax in pcDNA-circDDX17+miR-223-3p group were lower than those of pcDNA-circDDX17+miR-con group [(64.03±3.48)% and (15.21±1.18)%, respectively, P<0.05]. Conclusion: circDDX17 could inhibit the proliferation and induce apoptosis of non-small cell lung cancer cells via targeting the miR-223-3p / RIP3 molecular axis.
目的： 探讨circDDX17通过靶向miR-223-3p/RIP3分子轴调控非小细胞肺癌细胞增殖及凋亡的分子机制。 方法： 采用实时荧光定量聚合酶链反应（qRT-PCR）检测人正常肺上皮细胞株BEAS-2B和非小细胞肺癌H1299、A549、H446细胞中circDDX17、miR-223-3p、受体相互作用蛋白3（RIP3）的表达水平。分别将pcDNA、pcDNA-circDDX17、anti-miR-con、anti-miR-223-3p、pcDNA-circDDX17与miR-con、pcDNA-circDDX17与miR-223-3p mimics转染至H1299细胞。采用四甲基偶氮唑蓝法检测细胞增殖情况，流式细胞术检测细胞周期和细胞凋亡情况，平板克隆实验检测细胞增殖能力，双荧光素酶报告实验验证circDDX17与miR-223-3p、miR-223-3p与RIP3的靶向关系，Western blot法检测CyclinD1、CDK2、Cleaved caspase-3、Bax蛋白的表达水平。 结果： 与BEAS-2B比较，H1299、A549、H446细胞中circDDX17 mRNA表达水平降低，miR-223-3p mRNA表达水平升高，RIP3 mRNA的表达水平降低（均P＜0.05）。pcDNA-circDDX17组细胞活力［（69.46±4.68）%］、细胞克隆数［（83.49±7.86）个］、S期细胞比例［（22.52±1.41）%］、CyclinD1、CDK2蛋白表达水平均低于pcDNA组［分别为（97.54±7.72）%、（205.03±13.37）个、（28.69±1.49）%，均P＜0.05］，pcDNA-circDDX17组细胞G0/G1期细胞比例［（64.45±3.56）%］、细胞凋亡率［（18.36±1.63）%］、Cleaved caspase-3、Bax蛋白表达水平均高于pcDNA组［分别为（51.33±2.76）%和（5.21±0.54）%，均P＜0.05］；anti-miR-223-3p组细胞活力［（72.64±5.44）%］、细胞克隆数［（78.16±8.23）个］、S期细胞比例［（21.34±1.59）%］、CyclinD1、CDK2蛋白表达水平均低于anti-miR-con组［分别为103.47±6.25、（169.32±14.53）个、（28.43±1.26）%，均P＜0.05］，anti-miR-223-3p组细胞G0/G1期细胞比例［（62.86±3.28）%］、细胞凋亡率［（14.64±1.67）%］、Cleaved caspase-3、Bax蛋白表达水平均高于anti-miR-con组［分别为（51.33±2.71）%和（4.83±0.39）%，均P＜0.05］。circDDX17与miR-223-3p存在结合位点，miR-223-3p与RIP3存在结合位点。pcDNA-circDDX17+miR-223-3p组细胞活力［（135.45±9.28）%］、细胞克隆数［（174.64±10.68）个］、S期细胞比例［（26.39±2.25）%］、CyclinD1、CDK2蛋白表达水平均高于pcDNA-circDDX17+miR-con组［分别为（101.56±6.68）%、（107.65±7.62）个、（21.64±1.72）%，均P＜0.05］，pcDNA-circDDX17+miR-223-3p组细胞G0/G1期细胞比例［（56.64±2.76）%］、细胞凋亡率［（8.34±0.76）%］、Cleaved caspase-3、Bax蛋白表达水平均低于pcDNA-circDDX17+miR-con组［分别为（64.03±3.48）%和（15.21±1.18）%，均P＜0.05］。 结论： circDDX17可靶向调控miR-223-3p/RIP3分子轴从而抑制非小细胞肺癌细胞增殖及诱导细胞凋亡。.