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To investigate whether de novo protein synthesis in the parabrachial nucleus (PBN) is required for recovery from taste neophobia, anisomycin (a protein synthesis inhibitor) was infused immediately after consumption of a novel saccharin solution (Experiment 1). Unexpectedly, this PBN treatment caused a reduction in saccharin intake. In addition, we found that the anisomycin-induced suppression of tastant intake was attenuated by prior intra-PBN infusions of lidocaine (Experiment 2). This pattern of results raises concerns about using anisomycin to investigate memory consolidation processes in the PBN. Thus, a different manipulation may be needed to examine the nature of the neuroplastic changes that occur in the PBN during taste memory formation.
Duchenne muscular dystrophy is a recessive X-linked disease characterized by progressive muscle wasting; cardiac or respiratory failure causes death in most patients by the third decade. The disease is caused by mutations in the dystrophin gene that lead to a loss of functional dystrophin protein. Although there are currently few treatments for Duchenne muscular dystrophy, previous reports have shown that upregulating the dystrophin paralog utrophin in Duchenne muscular dystrophy mouse models is a promising therapeutic strategy. We conducted in silico mining of the Connectivity Map database for utrophin-inducing agents, identifying the p38-activating antibiotic anisomycin. Treatments of C2C12, undifferentiated murine myoblasts, and mdx primary myoblasts with anisomycin conferred increases in utrophin protein levels through p38 pathway activation. Anisomycin also induced utrophin protein levels in the diaphragm of mdx mice. Our study shows that repositioning small molecules such as anisomycin may prove to have Duchenne muscular dystrophy clinical utility.
Necroptosis is an essential pathophysiological process in cerebral ischemia-related diseases. Therefore, targeting necroptosis may prevent cell death and provide a much-needed therapy. Ansiomycin is an inhibitor of protein synthesis which can also activate c-Jun N-terminal kinases. The present study demonstrated that anisomycin attenuated necroptosis by upregulating CHIP (carboxyl terminus of Hsc70-interacting protein) leading to the reduced levels of receptor-interacting protein kinase 1 (RIPK1) and receptor-interacting protein kinase 3 (RIPK3) proteins in two in vitro models of cerebral ischemia. Further exploration in this research revealed that losing neither the co-chaperone nor the ubiquitin E3 ligase function of CHIP could abolish its ability to reduce necroptosis. Collectively, this study identifies a novel means of preventing necroptosis in two in vitro models of cerebral ischemia injury through activating the expression of CHIP, and it may provide a potential target for the further study of the disease.
Oxidative stress and inflammation as the pathological components of Alzheimer's disease (AD) have been well understood. Among a diversity of mitogen-activated protein kinase (MAPK) family members, JNK and p38 MAPK subfamilies are relevant to the response of environmental stress, inflammatory stimuli, or other insults. Recent studies have demonstrated that epigenetic mechanisms may play a pivotal role in AD pathogenesis and development. In the present study, we have investigated epigenetic mechanisms such as DNA methylation and histone acetylation involved in the activation of stress-related signaling pathways for amyloid-β (Aβ) production. Human neuroblastoma SH-SY5Y cells were treated by anisomycin, an activator of stress-related MAPKs (JNK and p38 MAPK). A significant increase of intracellular Aβ level in anisomycin-treated SH-SY5Y cells was observed. The expression of amyloid-β precursor protein (APP), β-site APP-cleaving enzyme 1 (BACE1), and presenilin 1 (PS1) was upregulated by demethylation in three gene promoters associated with the reduction of methyltransferases (DNMTs). Meanwhile, an enhanced level of global histone H3 acetylation accompanied with upregulation of histone acetyltransferases p300/CREB-binding protein (CBP) and downregulation of histone deacetylases (HDACs) was also observed. These findings indicated that the activation of stress-related signaling pathways could result in the increased transcription of APP, BACE1, and PS1 genes through DNMT-dependent hypomethylation and histone H3 hyperacetylation, thus leading to Aβ overproduction. Moreover, our findings provided a novel insight into epigenetic mechanisms by which oxidative stress contributes to the pathogenesis of AD.
Anisomycin is both a well-established protein synthesis inhibitor and a potent activator of the p38/JNK MAPK pathway. It has been used to block the late phase of long-term potentiation (LTP) and long-term depression (LTD) in hippocampus. In this study, we have found that anisomycin produces a time-dependent decline in the magnitude of the field EPSP (fEPSP) in acute brain slices of mouse primary visual cortex. This anisomycin-mediated fEPSP depression occludes NMDA receptor-dependent LTD induced by low-frequency stimulation (LFS). In contrast, two other protein synthesis inhibitors, emetine and cycloheximide, have no effect either on baseline synaptic transmission or on LTD. Moreover, the decline of the fEPSP caused by anisomycin can be rescued by the application of the p38 inhibitor SB203580 but not by the JNK inhibitor SP600125. These results indicate that activation of p38 MAPK by anisomycin induces LTD and subsequently occludes electrically induced LTD. Also, the occlusion of LFS-LTD by anisomycin suggests that common mechanisms may be shared between the two forms of synaptic depression. Consistent with this view, bath application of a membrane permeant peptide derived from the carboxyl tail of GluR2 subunit of AMPA receptor, which specifically blocks regulated AMPA receptor endocytosis, thereby preventing the expression of LFS-induced LTD, significantly reduced the anisomycin-induced decline of the fEPSP. In conclusion, our results indicate that anisomycin produces long-lasting depression of AMPA receptor-mediated synaptic transmission by activating p38 MAPK-mediated endocytosis of APMA receptors in mouse primary visual cortex.
Protein synthesis inhibitors block consolidation of memory and may also block the reconsolidation of a reactivated memory in paradigms of aversive learning, but the evidence for reconsolidation effects is conflicting in appetitive paradigms. We now report that intra-cerebroventricular (ICV) anisomycin (400microg) prevents consolidation of morphine-induced place preference (CPP), but does not impair its reconsolidation unless the reactivation procedure associates anisomycin with the morphine context. Rats were injected alternately with morphine (5mg/kg, IP) or vehicle, and confined to one of two distinctive compartments in a three compartment apparatus. On a subsequent day rats were allowed to choose the compartment they preferred in a 20min test session. In the first experiment, rats that were injected with vehicle or with anisomycin before or 3h after training sessions, developed a CPP. However, rats that received anisomycin ICV immediately after training sessions did not develop a CPP. In experiment 2, rats received no ICV injections during initial training. Once a CPP was established, they received four additional training sessions on which they received vehicle or anisomycin ICV. All groups continued to prefer the morphine-paired compartment after reactivation sessions with vehicle or anisomycin ICV. In experiment 3, ICV anisomycin was administered selectively on morphine-paired reactivation trials or saline-paired reactivation trials and the CPP was weakened or strengthened, respectively. This suggests that associations between aversive effects of the amnestic treatment and the morphine context might mimic disruption of reconsolidation.
Chronic myeloid leukemia (CML) responds well to BCR-ABL tyrosine kinase inhibitors (TKI), such as imatinib and dasatinib. However, these inhibitors have been less effective as single agents in the blast phase-CML. In this work, we show that anisomycin, a clinically available drug, targets CML cells at all stages of development and enhances BCR-ABL TKIs' efficacy. Anisomycin at nanomolar concentration inhibits proliferation and induces apoptosis in a panel of CML cell lines in a dose-dependent manner. It induces apoptosis CD34 stem/progenitor cells isolated from patients with blast phase CML. Using colony formation and serial replating assays, we further show that anisomycin inhibits CML CD34 cell differentiation, proliferation and self-renewal. Additionally, anisomycin is less effective in normal bone marrow (NBM) CD34 cells, suggesting the selective anti-leukemia activity of anisomycin. Combination of anisomycin with imatinib or dasatinib achieves significantly better efficacy than TKI alone in leukemia cell lines and patient samples while sparing normal counterparts. Mechanistically, we demonstrate that p38 MAPK/JNK activation is not required for anti-leukemia activities of anisomycin. Instead, anisomycin displays preferential inhibitory effects to Wnt/β-catenin-mediated signaling in CML. Our work provides the preclinical evidence on the potent efficacy of anisomycin in leukemia and its mechanisms of action. Our work suggests that anisomycin is a potential drug to overcome resistance to BCR-ABL TKI treatment in blast phase CML.
Since its discovery in the 1960s, anisomycin has been used for studying the impact of protein synthesis for manifold cerebral processes such as long-term plastic changes after learning. The common limitation of nearly all pharmacological experiments, including anisomycin treatment, is to precisely verify the affected brain regions. Here we illustrate anisomycin effects on protein synthesis in distinct brain regions of mice (C57BL/6JOlaHsd), revealing differences between three modes of anisomycin application (subcutaneous, s.c.; intraperitoneal, i.p.; local microinfusions into the hippocampus). Our method is based on inhibition of the incorporation of the radioactively-labelled amino acids [(35)S]-Methionine/Cysteine into newly synthesised proteins. Washing the brain slices before autoradiography removes pools of amino acids, which have not been incorporated into newly synthesised proteins, thus, illustrating pure protein synthesis. By comparing different routes of systemic anisomycin application (i.p. versus s.c.; 150 mg/kg) it became evident that the effect of i.p. injection of anisomycin is fully reversed after 6 h, whereas s.c. injection is inhibiting protein synthesis in the hippocampus even 9 h after application. Local microinfusions of anisomycin into the hippocampus were shown to have long-lasting effects as well, which reversed as late as 9 h after injection. The diffusion of anisomycin was maximal at 3 h after injection and more precisely confined to the intended area using a lower dose (20 microg/site) instead of the commonly used dose of 62.5 microg/site. The broad time window of anisomycin action, as revealed in our study, has to be considered, if it comes to the interpretation of time course studies within the context of protein synthesis-dependent processes.
Despite advances in the clinical management of hepatocellular carcinoma (HCC), this form of cancer remains the second leading cause of cancer-related death worldwide. Currently, there are few treatment options for advanced HCC. Therefore, novel treatment strategies for HCC are required. Here, we described the promising antitumour effects of anisomycin, which exerts both direct killing effects and natural killer cell (NK)-mediated immunotherapeutic effects in HCC. To better elucidate the mechanisms through which anisomycin mediates its antitumour effects, we performed a genome-scale transcriptional analysis. We found that anisomycin treatment of HCC differentially modulated a broad range of immune regulation-associated genes. Among these immune regulation-associated genes, we found that lymphocyte function-associated antigen-3 (LFA-3, also called CD58), whose expression was significantly increased in anisomycin-treated HCC cells, was a critical player in NK-mediated immunotherapeutic effects. Furthermore major histocompatibility complex molecules class I (MHC-I) on HCC cells were also significantly regulated by treatment of anisomycin. Those adhesion molecules like CD58, MHC-I, and ICAM4 should be important for immune synapse formation between NK cells and HCC cells to boost NK-mediated immunotherapeutic effects. Notably, this is the first report of NK-dependent immunomodulatory effects of anisomycin suggesting anisomycin as a novel therapeutic drug for treatment of HCC.
Transcription factor GATA-6 plays a key role in normal cell differentiation of the mesoderm and endoderm. On the other hand, GATA-6 is abnormally overexpressed in many clinical gastrointestinal cancer tissue samples, and accelerates cell proliferation or an anti-apoptotic response in cancerous tissues. We previously showed that activation of the JNK signaling cascade causes proteolysis of GATA-6. In this study, we demonstrated that anisomycin, a JNK activator, stimulates nuclear export of GATA-6 in a colorectal cancer cell line, DLD-1. Concomitantly, anisomycin remarkably inhibits the proliferation of DLD-1 cells via G2/M arrest in a plate culture. However, it did not induce apoptosis under growth arrest conditions. Furthermore, the growth of DLD-1 cells in a spheroid culture was suppressed by anisomycin. Although 5-FU showed only a slight inhibitory effect on 3D spheroid cultures, the same concentration of 5-FU together with a low concentration of anisomycin exhibited strong growth inhibition. These results suggest that the induction of GATA-6 dysfunction may be more effective for chemotherapy for colorectal cancer, although the mechanism underlying the synergistic effect of 5-FU and anisomycin remains unknown.
MAP kinase is associated with delta-opioid receptor (DOR) signaling and plays a role in cell survival/death. Since anisomycin may alter MAP kinase activity and affect neuronal survival, we investigated whether anisomycin alters neuronal response to hypoxic stress and DOR inhibition. The experiments were performed in cultured cortical neurons. MAP kinase activities were determined by immunoblotting and neuronal viability was assessed by LDH leakage and live/dead morphological study. DOR inhibition with naltrindole (10 microM) led to significant injury in normoxic neurons after 24 h of treatment and exacerbated hypoxia-induced injury. Along with the injury, either by hypoxia or naltrindole, phosphorylated p38 increased in a major way, while phosphorylated ERK and JNK had no significant change or slightly decreased. Anisomycin (50 ng/ml) prevented the increase in phosphorylated p38 immunoreactivity induced by naltrindole and reduced the neuronal injury. The results suggest that (1) MAP kinases are differentially involved in neuronal response to hypoxia and DOR inhibition in cortical neurons with phosphorylated p38 immunoreactivity being upregulated and (2) anisomycin attenuates the increase in phosphorylated p38 immunoreactivity and reduces neuronal injury induced by hypoxia and DOR inhibition.
Parasitic infections are a major source of human suffering, mortality, and economic loss, but drug development for these diseases has been stymied by the significant expense involved in bringing a drug though clinical trials and to market. Identification of single compounds active against multiple parasitic pathogens could improve the economic incentives for drug development as well as simplifying treatment regimens. We recently performed a screen of repurposed compounds against the protozoan parasite Entamoeba histolytica, causative agent of amebic dysentery, and identified four compounds (anisomycin, prodigiosin, obatoclax and nithiamide) with low micromolar potency and drug-like properties. Here, we extend our investigation of these drugs. We assayed the speed of killing of E. histolytica trophozoites and found that all four have more rapid action than the current drug of choice, metronidazole. We further established a multi-institute collaboration to determine whether these compounds may have efficacy against other parasites and opportunistic pathogens. We found that anisomycin, prodigiosin and obatoclax all have broad-spectrum antiparasitic activity in vitro, including activity against schistosomes, T. brucei, and apicomplexan parasites. In several cases, the drugs were found to have significant improvements over existing drugs. For instance, both obatoclax and prodigiosin were more efficacious at inhibiting the juvenile form of Schistosoma than the current standard of care, praziquantel. Additionally, low micromolar potencies were observed against pathogenic free-living amebae (Naegleria fowleri, Balamuthia mandrillaris and Acanthamoeba castellanii), which cause CNS infection and for which there are currently no reliable treatments. These results, combined with the previous human use of three of these drugs (obatoclax, anisomycin and nithiamide), support the idea that these compounds could serve as the basis for the development of broad-spectrum anti-parasitic drugs.
Treatment of the hormone refractory prostate cancer cell line DU 145 with sublethal concentrations of chemotherapeutic drugs has been reported to sensitise these cells to Fas mediated apoptosis. However, the mechanism by which this occurs has not been determined. Our group has shown that inhibition of JNK activity completely abrogates the effects of chemotherapeutic drugs. Using anisomycin, a potent JNK agonist, we have demonstrated a role for JNK in Fas mediated apoptosis in DU 145 cells. Inhibition of Caspase 8 and Caspase 9 completely inhibits this process which suggests that DU 145 cells require mitochondrial amplification of the Fas apoptotic signal. Furthermore, we have shown that inhibition of Fas mediated apoptosis is an early event in DU 145 cells, occurring upstream of Caspase 8 cleavage. It is hoped that identifying the target of JNK will allow novel therapies to be developed for the treatment of hormone refractory prostate cancer. Such therapies are especially important because no single or combined treatment to date has significantly prolonged survival in patients with hormone refractory prostate cancer.
Annexin V is a Ca(2+)-dependent phospholipid-binding protein belonging to the annexin family whose regulation is currently not well understood. In this study, we utilized anisomycin, a protein synthesis inhibitor that activates MAP kinases (MAPKs), to examine the role of MAPKs in annexin V expression in the MCAS ovarian carcinoma cell line. A one-step real-time TaqMan-based reverse transcriptase-PCR method was developed to quantify annexin V mRNA expression. We found that annexin V was induced 13.3-fold by anisomycin and that this superinduction was attenuated by pretreatment with the MEK inhibitors, U0126 and PD98059, but not with the p38 MAPK inhibitor, SB203580. In addition, immunoblotting showed that anisomycin stimulated the phosphorylation of ERK1/2 as well as p38 MAPK and that the phosphorylations were blocked by the three kinase inhibitors. Taken together, these results suggest that anisomycin superinduces annexin V mRNA expression through the ERK1/2 MAPK pathway, but not through the p38 MAPK pathway.
The psychostimulant, amphetamine (AMPH), and the protein synthesis inhibitor, anisomycin (ANI), have been shown to modulate the consolidation and reconsolidation of several types of learning. To determine whether Pavlovian conditioned approach (PCA) is modulated in a similar manner, we examined the effects of post-training and post-reactivation administration of both AMPH and ANI on memory for PCA. Male Long-Evans rats received PCA training sessions during which presentations of a CS+ were followed by sucrose delivery. AMPH (1 mg/kg, s.c.) injected immediately but not 6h after the first training session enhanced PCA behavior. ANI (150 mg/kg, s.c.) injected immediately but not 3h after the first training session impaired PCA behavior. This impairment was not due to the development of a conditioned taste aversion. To examine whether PCA can also be modulated by post-reactivation administration of AMPH and ANI, rats were given an injection of AMPH, ANI, or vehicle immediately after a memory reactivation session. Upon testing, the behavior of both the AMPH- and the ANI-treated rats was unaffected. This result remained consistent when the experiment was repeated with changes to various behavioral parameters (i.e., amount of training, length of memory reactivation). These findings indicate that AMPH and ANI act during the post-training but not the post-reactivation period to enhance and impair, respectively, the learning of PCA. This suggests that the consolidation of PCA can be modulated in a manner comparable to other types of learned associations, but once learned, the memory appears to be relatively robust and stable.
Background: Ovarian cancer recurrence and metastasis are predominantly attributed to ovarian cancer stem cells; however, the mechanism by which anisomycin regulates human ovarian cancer stem cells (HuOCSCs) remains unclear. Methods: cDNA microArray was used to screen microRNAs (miRNAs) targeted by anisomycin, and RT-qPCR validated the miRNA targets. TargetScan database, GO enrichment analysis, and RT-qPCR, accompanied by a fluorescent reporter system, were employed to verify the miRNA target genes. In vitro experimental cell proliferation inhibition assay, flow cytometry, Transwell, angiogenesis assay, and in vivo transplantation tumor assay were implemented to assess the ability of the overexpressed miRNAs to hinder HuOCSC activity. Western blot, RT-qPCR, and immunofluorescence were applied to measure the transcriptional and protein-level expression of the miRNA target genes and their related genes. Bioinformatic analysis predicted and deciphered the role of the miRNA target genes and related genes in the development and prognosis of ovarian cancer. Results: The expression levels of multiple DLK1-DIO3 imprinted microRNA cluster members were altered by anisomycin, among which miR-134-3p expression was most significantly elevated. miR-134-3p overexpression significantly suppressed HuOCSC activity. The screening and validation of target genes uncovered that miR-134-3p was able to markedly suppress GPR137 expression. Additionally, miR-134-3p regulated the cytoskeleton, migration-related protein in the NDEL1/DYNEIN/TUBA1A axis through targeting GPR137. Bioinformatics prediction unveiled a close association of GPR137, NDEL1, DYNC1H1, and TUBA1A with ovarian cancer development and prognosis. Conclusions: The activity of HuOCSCs may be compromised by anisomycin through the regulation of miR-134-3p, which inhibits the GPR137/NDEL1/DYNEIN/TUBA1A axis.
Hepatocellular carcinoma (HCC) is a prevalent malignant tumor worldwide. Ferroptosis is emerging as an effective target for tumor treatment as it has been shown to potentiate cell death in some malignancies. However, it remains unclear whether histone phosphorylation events, an epigenetic mechanism that regulates transcriptional expression, are involved in ferroptosis. Our study found that supplementation with anisomycin, an agonist of p38 mitogen-activated protein kinase (MAPK), induced ferroptosis in HCC cells, and the phosphorylation of histone H3 on serine 10 (p-H3S10) was participated in anisomycin-induced ferroptosis. To investigate the anticancer effects of anisomycin-activated p38 MAPK in HCC, we analyzed cell viability, colony formation, cell death, and cell migration in Hep3B and HCCLM3 cells. The results showed that anisomycin could significantly suppress HCC cell colony formation and migration and induce HCC cell death. The hallmarks of ferroptosis, such as abnormal accumulation of iron and elevated levels of lipid peroxidation and malondialdehyde, were detected to confirm the ability of anisomycin to promote ferroptosis. Furthermore, coincubation with SB203580, an inhibitor of activated p38 MAPK, partially rescued anisomycin-induced ferroptosis. And the levels of p-p38 MAPK and p-H3S10 were successively increased by anisomycin treatment. The relationship between p-H3S10 and ferroptosis was revealed by ChIP sequencing. The reverse transcription PCR and immunofluorescence results showed that NCOA4 was upregulated both in mRNA and protein levels after anisomycin treatment. And by C11-BODIPY staining, we found that anisomycin-induced lipid reactive oxygen species was reduced after NCOA4 knockdown. In conclusion, the anisomycin-activated p38 MAPK promoted ferroptosis of HCC cells through H3S10 phosphorylation.
The objective of the study was to describe cellular and molecular markers of radioprotection by anisomycin, focusing on the changes in rat brain tissue. Two-month-old Wistar rats were exposed to a 60Co radiation source at a dose of 6 Gy, with or without radioprotection with anisomycin (150 mg/kg) administered subcutaneously 30 min before or 3 or 6 h after irradiation. Survivors were analyzed 30 days after treatment. Astroglial and microglial responses were investigated based on the expression of glial markers assessed with immunohistochemistry, and quantitative changes in brain biomolecules were investigated by Raman microspectroscopy. In addition, blood plasma levels of pro-inflammatory (interleukin 6 and tumor necrosis factor α) and anti-inflammatory (interleukin 10) cytokines were assessed. We found that application of anisomycin either before or after irradiation significantly decreased the expression of the microglial marker Iba-1. We also found an increased intensity of Raman spectral bands related to nucleic acids, as well as an increased level of cytokines when anisomycin was applied after irradiation. This suggests that the radioprotective effects of anisomycin are by decreasing Iba-1 expression and stabilizing genetic material by increasing the level of nucleic acids.
The effect of the toxic chemical Na-arsenite and the protein synthesis inhibitor anisomycin on glucose transport in primary cultures of bovine chromaffin cells was compared using the effect of insulin-like growth factor I (IGF-I) as a reference. The enhanced uptake of glucose obtained in response to arsenite and anisomycin reached maximum after 60 min, with the response to anisomycin being delayed in onset relative to that of arsenite. At maximal doses the arsenite effect was consistently higher than that of anisomycin and comparable to the approximately 2-fold effect produced by IGF-I. The selective inhibitor of stress-activated protein kinase 2 (SAPK2), SB 203580, inhibited completely anisomycin-induced glucose uptake but only partly suppressed uptake stimulated by arsenite. Both substances, in concentrations producing maximal effects on glucose transport, led to a strong phosphorylation of SAPK2. In contrast to the effect on glucose transport, the arsenite-induced phosphorylation of SAPK2 was relatively slow compared to the anisomycin-induced activation. The results indicate that glucose uptake induced by the two types of cellular stress are mediated by at least two different signaling pathways, which also differ from that activated by IGF-I.
Angiogenesis has an important role in tumour cell growth and metastasis. Anisomycin has been shown to inhibit tumour cell growth. However, whether anisomycin can inhibit angiogenesis of tumours has not been reported. The present study demonstrated that there was a positive correlation between tumour angiogenesis and the number of CD44+/CD133+ serous human ovarian cancer stem cells (HuOCSCs). Subsequently, it was confirmed that anisomycin significantly inhibited the proliferation, invasion, tumorigenic ability and tumour angiogenesis of HuOCSCs. Gene expression profiling by cDNA microarrays revealed that the expression levels of vascular endothelial cell markers, platelet‑derived growth factors, Notch pathway components and 27 tumour angiogenesis‑related genes were significantly decreased in the anisomycin‑treated group compared with the control group. Further experiments demonstrated that the expression levels of endogenous long non‑coding RNA (lncRNA) maternally expressed 3 (Meg3) were significantly decreased in anisomycin‑treated HuOCSCs, whereas the expression levels of microRNA (miR)‑421 were significantly increased. The results of luciferase reporter assays indicated that, when miR‑421 was overexpressed in cells, the luciferase activities of wild‑type platelet derived growth factor receptor α (PDGFRA) 3' untranslated region and Meg3 reporter plasmids were significantly decreased. Overexpression of miR‑421 in HuOCSCs significantly enhanced the anisomycin‑mediated inhibition of HuOCSC proliferation. Taken together, the present results demonstrated that anisomycin inhibited the activation downstream of the Notch1 pathway by attenuating the molecular sponge effect of the lncRNA‑Meg3/miR‑421/PDGFRA axis, ultimately inhibiting angiogenesis, proliferation and invasion in ovarian cancer cells.
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