Overexpression of miR-195-5p reduces osteoporosis through activating BMP-2/SMAD/Akt/RUNX2 pathway via targeting SMURF1

Osteoporosis (OP) is among the most common frequent chronic metabolic bone diseases in postmenopausal women. Here, the effect and underlying mechanisms of miR-195-5p in OP were investigated both in vivo and in vitro. In this study, the microgravity (MG) environment was simulated in MC3T3-E1 cells, and miR-195-5p overexpression or SMURF1 knockdown model was constructed to test their effects on the proliferation, apoptosis and osteogenic differentiation of MC3T3-E1 cells. Furthermore, an OVX mouse model was constructed in vivo, and adenovirus-loaded miR-195-5p mimics were administered to the mice to overexpress miR-195-5p. HE staining and µCT were adopted to observe pathological changes of femur. The targeted relationship between miR-195-5p and SMURF1 was predicted by bioinformatics analysis and verified by the dual-luciferase reporter assay and RNA immunoprecipitation (RIP) experiment. The results indicated that miR-195-5p was down-regulated in the head of femur of OP mouse model and MC3T3-E1 cells subjected to MG microenvironment. In addition, overexpression of miR-195-5p promoted MC3T3-E1 cell osteogenic differentiation and inhibited apoptosis. Mechanistically, SMURF1 is identified as a target of miR-195-5p, and overexpressing miR-195-5p activates the BMP-2/SMAD/Akt/RUNX2 signal by inhibiting the SMURF1 expression. Moreover, SMURF1 downregulation accelerated the osteogenic differentiation of MC3T3-E1 cells and attenuated MG-mediated apoptosis. In addition, upregulating miR-195-5p reduced osteoporosis in the OVX mouse model, accompanied with SMURF1 downregulation and BMP-2/SMAD/Akt/RUNX2 pathway activation. Collectively, miR-195-5p enhances osteogenic differentiation of osteoclast and relieve OP progression in the mouse model through activation of the BMP-2/SMAD/Akt/RUNX2 axis by targeting SMURF1.

[Highly toxic type Ⅱ ribosome-inactivating proteins ricin and abrin and their detection methods: a review]

Ⅱ型核糖体失活蛋白(RIPs)是一类重要的蛋白毒素,该类毒素大都具有一对二硫键连接的A-B链结构特征,B链具有半乳糖结合特性,能够与真核细胞膜表面受体特异性结合,将具有N-糖苷酶活性的A链导入细胞,与核糖体特定位点发生脱嘌呤作用使核糖体失活,最终通过抑制蛋白质合成而展现出细胞毒性。Ⅱ型RIPs毒素毒性极强,来源于植物的蓖麻毒素(ricin)和相思子毒素(abrin)的毒性分别是神经性毒剂维埃克斯(Vx)的385倍和2885倍。同时,该类毒素来源广泛、易于制备、稳定性好,成为一类潜在化生恐怖战剂,受到国内外广泛关注,其中蓖麻毒素作为唯一的蛋白毒素被收录于禁止化学武器公约禁控清单。近年来发生的多次蓖麻毒素邮件恐怖事件,进一步促进了有关Ⅱ型RIPs毒素的准确、灵敏、快速的检测鉴定技术的发展。剧毒性Ⅱ型RIPs毒素的检测鉴定方法主要涉及免疫分析法为代表的特异性识别和生物质谱分析为主的定性定量检测方法,以及基于脱嘌呤反应活性和细胞毒性的毒素活性检测方法。基于抗原-抗体作用的免疫检测法及基于寡核苷酸适配体的特异性识别检测法具有速度快、灵敏度高的优势,但对于复杂样品中高度同源蛋白的检测,易产生假阳性结果。随着生物质谱技术的快速发展,电喷雾离化(ESI)或基质辅助激光解吸离化(MALDI)等技术广泛应用于蛋白质的准确鉴定,不仅能够提供蛋白毒素的准确分子量和结构序列信息,而且能够实现准确定量。酶解质谱法是应用最为广泛的检测鉴定方法,通过酶解肽指纹谱分析,实现蛋白毒素的准确鉴定;对于复杂样品中蛋白毒素的分析,通过多种蛋白酶酶解策略获得丰富的特异性肽段标志物,然后进行肽段标志物的靶向质谱分析从而获得准确的定性及定量信息,方法有效提升了Ⅱ型RIPs毒素鉴定的准确度和灵敏度。免疫分析法和生物质谱法能够准确鉴定Ⅱ型RIPs毒素,但无法识别毒素是否还保持毒性。对于Ⅱ型RIPs毒素的活性分析,主要包括基于N-糖苷酶活性的脱嘌呤反应测定法和细胞毒性测定法,两种方法均可实现毒素毒性的简便、快速、灵敏的分析检测,是Ⅱ型RIPs毒素检测方法的有效补充。由于该类毒素的高度敏感性,国际禁止化学武器组织(OPCW)对相关样品中Ⅱ型RIPs毒素的分析提出了唯一性鉴定的技术要求。该文引用了Ⅱ型RIPs毒素及其检测方法相关的70篇文献,综述了以上Ⅱ型RIPs毒素的结构性质、中毒机理及典型剧毒性Ⅱ型RIPs毒素检测方法的研究进展,对不同检测方法的特点和应用潜力进行了总结,并结合OPCW对Ⅱ型RIPs毒素唯一性鉴定的技术需求,展望了未来Ⅱ型RIPs毒素检测技术研究的发展趋势。

[A comparison between endoscopic CO2 laser cauterization and open neck surgery in the treatment of congenital piriform fistula]

Objective: To compare the efficacy, advantages and disadvantages of endoscopic CO₂ laser cauterization (ECLC) and open neck surgery in the treatment of congenital pyriform sinus fistula (CPSF). Methods: From September 2014 to March 2017, 80 cases with confirmed diagnosis of CPSF received initial treatment at Guangdong Provincial People's Hospital were prospectively analyzed, including 34 males and 46 females, aged 18 to 672 (194.17±141.18) months. They were consecutively divided into endoscopic group and open-surgery group, with 40 cases in each group. Both groups of patients received surgical treatment under general anesthesia. The endoscopic group was treated by endoscopic CO₂ laser cauterization, and the open-surgery group underwent the following surgery: first, we performed suspension laryngoscopy examination to confirm the presence of fistula in the bottom of the piriform fossa, then open-neck resection of congenital piriform sinus fistula with recurrent laryngeal nerve and/or lateral branch of superior laryngeal nerve anatomy plus partial thyroidectomy were performed. The data between the two groups were compared, including the operative time, intraoperative blood loss, postoperative pain, average length of stay, neck cosmetic scores, complications and cure rates. All patients were followed up in outpatient clinics. Statistical analysis was performed using SPSS 20.0 software. P<0.05 indicates that the difference is statistically significant. Results: All patients were successfully completed the operation. The operative time, intraoperative blood loss, postoperative pain and average length of hospital stay in the endoscopic group were significantly less than those in the open group [(27.4±5.5) min to (105.8±52.5) min, (0.6±0.5) ml to (33.6±41.5) ml, (1.7±0.9) points to (4.6±0.7) points, (5.9±2.9)d to(8.9±3.3)d, t values were-9.400, -5.031, -16.199, -4.293, P values were all<0.01]; The neck cosmetic score in the endoscopy group was significantly greater than that of the open group [(9.9±0.4) against (5.8±0.9) points, t=25.847, P<0.01]. Compared with the open group (15.0%, 6/40), the complication rate of the endoscopic group (7.5%, 3/40) was not statistically significant (χ²=0.50, P>0.05). Three months after the first treatment, the cure rate in the endoscopic group (82.5%, 33/40) was significantly lower than that in the open-neck group (100.0%, 40/40), χ²=5.64, P<0.05. The follow-up time was 12 months after the last treatment. Eighty cases were followed up and none was lost to follow-up. During the follow-up period, the cure rate of the endoscopy group (97.5%, 39/40) was compared with that of the open group (100.0%, 40/40), and the difference was not statistically significant. Conclusions: In the treatment of CPSF, the two-surgical method each has their advantages. Compared with open-neck surgery, ECLC is simpler, repeatable. ECLC has shorter time in operation and hospital stay, less complications, and less postoperative pain and more precise cosmetic results. It could be preferred for the initial treatment of CPSF and relapsed cases after cauterization. But subject to relatively low cure rate of one-time cauterization and uncertain long-term efficacy, it cannot completely replace the open-neck surgery at present.

Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma

We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude [≥(4.1±0.4)  MV/m], the phase of the modulation along the bunch is reproducible from event to event, with 3%-7% (of 2π) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated.

[Application of artificial intelligence-assisted diagnosis for cervical liquid-based thin-layer cytology]

Objective: To explore the application value of artificial intelligence-assisted diagnosis system for TBS report in cervical cancer screening. Methods: A total of 16 317 clinical samples and related data of cervical liquid-based thin-layer cell smears, which were obtained from July 2020 to September 2020, were collected from Southern Hospital, Guangzhou Huayin Medical Inspection Center, Shenzhen Bao'an People's Hospital(Group) and Changsha Yuan'an Biotechnology Co., Ltd. The TBS report artificial intelligence-assisted diagnosis system of cervical liquid-based thin-layer cytology jointly developed by Southern Medical University and Guangzhou F. Q. PATHOTECH Co., Ltd. based on deep learning convolution neural network was used to diagnose all clinical samples. The sensitivity,specificity and accuracy of both artificial intelligence-assisted diagnosis system and cytologists using artificial intelligence-assisted diagnosis system were analyzed based on the evaluation standard(2014 TBS). The time spent by the two methods was also compared. Results: The sensitivity of artificial intelligence-assisted diagnosis system in predicting cervical intraepithelial lesions and other lesions (including endometrial cells detected in women over 45 years old and infectious lesions) under different production methods, different cytoplasmic staining and different scanning instruments was 92.90% and 83.55% respectively, and the specificity of negative samples was 87.02%, while that of cytologists using artificial intelligence-assisted diagnosis system was 99.34%, 97.79% and 99.10%, respectively. Moreover, cytologists using artificial intelligence-assisted diagnosis system could save about 6 times of reading time than manual. Conclusions: Artificial intelligence-assisted diagnosis system for TBS report of cervical liquid-based thin-layer cytology has the advantages of high sensitivity, high specificity and strong generalization. Cytologists can significantly improve the accuracy and work efficiency of reading smears by using artificial intelligence-assisted diagnosis system.

[Willingness on acceptance of peer-referral strategies for promoting HIV testing in men who have sex with men in Shijiazhuang]

Objective: To understand the willingness to accept peer-referral strategies for promoting HIV testing and related factors in men who have sex with men (MSM) in Shijiazhuang. Methods: A total of 544 MSM were recruited using convenient sampling and sharing two-dimensional code of online questionnaire througth MSM social organizations in Shijiazhuang from August to September in 2018. The anonymous online survey were taken by login through the website "jinshuju.com" (https://im.jinshuju.com/users/sign_in). The information collected included: the demographic and behavioral characteristics, the attitude to HIV testing for partners, and the willingness to accept peer-referral strategies for promoting HIV testing. The socio-demographic characteristics were analyzed by χ² test. Univariate and multivariate logistic regression analyses were conducted to identify the related factors associated with willingness. The SAS 9.4 software was used for statistical analysis. Results: A total of 521 MSM completed the survey. Among them 59.50% (310/521) were willing to advise their partners to receive HIV testing, and 90.02% (469/521) were willing to accept the partners' advice of HIV testing. Higher HIV testing frequency for once a year (aOR=2.72,95%CI:1.42-5.20); for once a half year (aOR=5.72, 95%CI:2.97-11.02); for ≥1 time a quarter (aOR=8.76,95%CI:4.56-16.83), enquiring their partners' HIV status (aOR=1.94, 95%CI: 1.15-3.28) and STD history of their partners (aOR=1.83, 95%CI:1.06-3.14) before having sex were the factors positively associated with the willingness to advise partners to receive HIV testing. Discussing HIV testing with partners (aOR=4.43,95%CI:1.87-10.54) was the factor positively associated with the desire to accept the advice of HIV testing from partners, but feeling emotional hurt by the suggestion of HIV testing (aOR=0.35,95%CI:0.15-0.82) was the factor negatively associated with the willingness to accept the advice of HIV testing from partners. Conclusion: To improve the willingess of MSM to advise their partners to receive HIV testing and strengthen self-protection awareness and equal communication skills are essential for the success of peer-referral strategies for promoting HIV testing among MSM.

Advances in sulfur mustard-induced DNA adducts: Characterization and detection

Sulfur mustard (SM) is a blister chemical warfare agent with severe cytotoxicity and genotoxicity. It can extensively alkylate important macromolecules in organisms, such as proteins, DNA, and lipids, and produce a series of metabolites, among which the characteristic ones can be used as biomarkers. The exact toxicological mechanisms of SM remain unclear but mainly involve the DNA lesions induced by alkylation and oxidative stress caused by glutathione depletion. Various methods have been used to analyze DNA damage caused by SM. Among these methods, liquid chromatography-tandem mass spectrometry (LC-MS/MS) technology stands out and makes it possible to observe damage in view of biomarkers induced by SM. Sample preparation is critical for detection by LC-MS/MS and mainly includes DNA isolation, adduct hydrolysis, and adduct purification. Moreover, optimization of chromatographic conditions, selection of MS transitions, and quantitative strategies are also essential. SM-DNA adducts are generally considered to be N⁷-HETEG, O⁶-HETEG, N⁷-BisG, and N³-HETEA. This article proposes some other possibilities of SM-DNA adducts for the identification of SM genotoxicity.

Proton Bunch Self-Modulation in Plasma with Density Gradient

We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400 GeV proton bunch. Results show that a positive or negative gradient increases or decreases the number of microbunches and the relative charge per microbunch observed after 10 m of plasma. The measured modulation frequency also increases or decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields' phase velocity due to plasma density gradients adding to the slow wakefields' phase velocity during self-modulation growth predicted by linear theory.

LncRNA CCAT1 promotes cell proliferation and differentiation via negative modulation of miRNA-218 in human DPSCs

OBJECTIVE

To investigate the expression of Long non-coding RNA (LncRNA) CCAT1 and potential functions in promoting cell proliferation and differentiation, via miRNA-218 in human adult Dental Pulp Stem Cells (DPSCs).

PATIENTS AND METHODS

CCAT1 expressions in Periodontal Ligament Cells (PDLCs), DPSCs, differentiated main population (MP) cells and stem-cell-enriched Side Population (SP) cells in DPSCs were detected by qRT-PCR. MTT assay and ELISA assay were performed to evaluate the DPSCs cell proliferation and differentiation. The correlation between miR-218 and CCAT1 was detected by statistical analysis. The bioinformatics and luciferase assay were performed to explore the interaction and binding site of CCAT1 and miR-218.

RESULTS

Results showed the CCAT1 expression was up-regulated in DPSCs cells. And the expression level in MP cell was higher than SP cell. MTT assay and showed overexpression CCAT1 significantly increased cell proliferation of DPSCs. ELISA assay showed the expressions of collagen I, Osteopontin (OPN) and Osteocalcin (OCN) were significantly increased in DPSCs compared with control (p<0.05). The bioinformatics and luciferase assay showed that the CCAT1 directly interacted with miR-218. In addition, miR-218 expression was negatively correlated with CCAT1 expression in DPSCs CONCLUSIONS: For the first time, we found that lncRNA-CCAT1 was upregulated in DPSCs, which could promote cell proliferation and differentiation by repressing the expression of miR-218.

[Genotypes and phenotypes of nine Uygur children with osteogenesis imperfecta in Xinjiang]

Objective: To explore the genotypes and phenotypes of osteogenesis imperfecta (OI) in Xinjiang Uygur children. Methods: The history of nine Uygur children with OI who were hospitalized in First Affiliated Hospital of Xinjiang Medical University from January 2013 to December 2017 were retrospectively reviewed. They were classified into 4 types according to the classical Sillence classification. The genes associated with OI were detected, and the pathogenic variation was assessed by InterVar and Alamut software according to the American College of Medical Genetics and Genomics (ACMG) recommendations. The phenotypes of children with different genotypes were further analyzed. Results: Nine cases aged 3 years and 6 monthes to 15 years were all clinically diagnosed as OI, the clinical manifes tations were repeated fractures, skeletal deformities,short stature, blue sclera, abnormol hearing, hypoplasia of dentin, and relaxation of Joint ligaments, among whom 6 was type Ⅲ OI, 3 were type Ⅳ OI. Nine mutations in 3 genes (COL1A1, COL1A2, and SERPINF1) were detected, and 5 of them were first reported and were all pathogenic variations. Conclusions: The cinical phenotypes of osteogenesis imperfecta in Xinjiang Uygur are complex and varied, but all of them have fractures and skeletal deformities. Genotype is different from that reported at China and abroad, and the SERPINF1 gene may have a higher incidence in Uyghur population. The genetic heterogeneity and unique gene variation pedigree of Uyghur osteogenesis imperfecta defects further provide a basis for the correlation between genotype and phenotype of osteogenesis defects.

ULK1 polymorphisms confer susceptibility to pulmonary tuberculosis in a Chinese population

OBJECTIVE

The autophagy pathway is a critical process in Mycobacterium tuberculosis infection, and can be regulated by uncoordinated 51-like kinase 1 (ULK1). We investigated the associations between single-nucleotide polymorphisms (SNPs) in ULK1 and risk of tuberculosis (TB) in a Chinese Han population.

DESIGN

We recruited 380 pulmonary tuberculosis (PTB) cases, 242 extra-pulmonary tuberculosis (EPTB) cases and 606 healthy controls from a Chinese Han population and sequenced ULK1. Five SNPs in ULK1 were selected to investigate the correlations between ULK1 polymorphisms and TB susceptibility.

RESULTS

The rs7138581 C allele was associated with a reduced risk of PTB (P = 0.001), whereas the rs9481 A allele was associated with an increased risk (P = 0.025). The rs7138581 CG genotype was significantly associated with a low risk of PTB, with a higher PTB disease severity in clinical parameters. Estimation of haplotype frequencies in ULK1 revealed a protective haplotype CCGAA (P = 0.007) and a potential risk haplotype TGAAA (P = 0.010) for PTB.

CONCLUSION

These results demonstrated that ULK1 polymorphisms have significant associations with susceptibility to PTB.

The Predictive Value of Sarcopenia and Its Individual Criteria for Cardiovascular and All-Cause Mortality in Suburb-dwelling Older Chinese

OBJECTIVES

The aim of the present study is to investigate the associations between the Asian Working Group for Sarcopenia (AWGS) sarcopenic definition, and its individual criteria, and risk of cardiovascular disease (CVD) and all-cause mortality in the Chinese elderly.

METHODS

Longitudinal analysis of 1,264 participants aged 60 years or older at baseline (2013-2014) living in suburban areas, China. Sarcopenia was defined according to the recommended algorithm of AWGS. Muscle mass was measured by a direct segmental multifrequency bioelectrical impedance analysis. Muscle strength was assessed by handgrip strength, and physical performance measured via usual walking speed.

RESULTS

Cox proportional hazard models were used to assess the risk of CVD and all-cause mortality. After 40 months of follow-up, forty-eight deaths (4.2%) died in this cohort. The mortality rate with sarcopenia was 4.7% in men and 3.8% in women. After adjusting for potential confounders, the risk of all-cause death was 4.15 times higher in subjects with sarcopenia. Furthermore, low muscle mass (HR: 2.62, 95% CI 1.34-5.13) and low grip strength (HR: 5.79; 95% CI 2.28-14.71), but not walking speed, were found to be significantly associated with all-cause mortality. Risk of CVD mortality was significantly greater in sarcopenia. Low grip strength and low walking speed were associated with 11 times (HR: 11.03, 95% CI 1.58-77.02) and 13 times (HR: 13.02; 95% CI 1.18-143.78) higher risk of CVD mortality.

CONCLUSIONS

Sarcopenia and components of sarcopenia were associated with greater CVD and all-cause mortality. Pertinent prevention or rehabilitation programs projects should look to promote healthy aging in different types of sarcopenia group.

A high level of serum neopterin is associated with rapidly progressive interstitial lung disease and reduced survival in dermatomyositis

Neopterin is primarily synthesized and released by activated macrophages/monocytes upon stimulation with interferon-γ and is considered as a marker for macrophage activation. This study aimed to analyze the serum levels of neopterin in patients with dermatomyositis (DM) in association with clinical manifestations, laboratory data and patient prognosis. One hundred and eighty-two consecutive DM patients and 30 healthy controls were retrospectively enrolled into the study. Serum levels of neopterin were significantly increased in DM patients compared to healthy controls (P < 0·001). High serum neopterin levels were associated with anti-melanoma differentiation-associated gene (MDA5) antibody, rapidly progressive interstitial lung disease (RP-ILD) and characteristic DM cutaneous involvement. Longitudinal assessment of serum samples revealed that the serum neopterin levels were closely correlated with disease severity (β = 30·24, P < 0·001). In addition, a significant increase in serum neopterin concentration of non-survivors was observed when compared to that of survivors (P < 0·001). Receiver operator characteristic curves showed that serum neopterin could distinguish non-survivors and survivors at an optimal cut-off level of 22·1 nmol/l with a sensitivity and specificity of 0·804 and 0·625, respectively (P < 0·001). Kaplan-Meier survival curves revealed that DM patients with serum neopterin > 22·1 nmol/l had a significantly higher mortality compared to the patient group with serum neopterin < 22·1 nmol/l (log-rank P < 0·001). Multivariate regression analysis identified high serum neopterin concentration to be an independent risk factor for poor prognosis in DM (adjusted hazard ratio = 4·619, 95% confidence interval = 2·092-10·195, P < 0·001). In conclusion, increased serum levels of neopterin were significantly associated with RP-ILD and reduced survival in DM patients, suggesting it as a promising biomarker in disease evaluation of DM.

[Clinicopathological features of lung salivary gland-type tumors]

Objective: To study the clinicopathological characteristics of lung salivary gland-type tumors (SGT), and to compare with the corresponding primary SGT in salivary glands. Methods: Twenty-three cases of lung SGT were retrieved from the files of Peking University First Hospital from January 2004 to September 2018. The morphology, immunophenotype, genotype and outcome of these cases were analyzed. Results: The 23 patients included 13 males and 10 females, with age range of 13-79 years (median 54 years). There were 11 cases of adenoid cystic carcinoma, 10 cases of mucoepidermoid carcinoma (MEC), one case each of clear cell carcinoma and myoepithelioma. The morphology and immunophenotype of lung SGT were very similar to their counterparts in salivary gland. MYB rearrangement was detected in one of 11 adenoid cystic carcinomas. MAML2 rearrangement was detected in all the MECs. EWSR1 rearrangement was detected in the one case of clear cell carcinoma. Of patients with adenoid cystic carcinoma, the survival time was more than 60 months (three cases), 52 months (one case), and 12-36 months (three cases). There was no recurrence and death in seven cases of MEC with follow-up results. One case of clear cell carcinoma recurred after 52 months of follow-up. Conclusions: Although the SGT of lung and their counterparts in salivary gland are very similar in their morphology, immunophenotype, genotype and prognosis, there are also some differences between each other. MYB rearrangement can be detected in most adenoid cystic carcinomas of salivary gland, but rarely in lung adenoid cystic carcinoma. The prognosis of patients with lung MEC is better than that of patients with salivary gland MEC, while the prognosis of patients with lung adenoid cystic carcinoma is worse than that of patients with salivary gland adenoid cystic carcinoma.

Involvement of circular RNA SMARCA5/microRNA-620 axis in the regulation of cervical cancer cell proliferation, invasion and migration

OBJECTIVE

Circular RNAs (circRNAs) have emerged as crucial regulators for tumor progression. However, the effects of circRNAs are not entirely clear in cervical cancer (CC). The objective of this study was to investigate the function and regulation mechanism of circular RNA SMARCA5 (circSMARCA5, also named hsa_circ_0001445) in cervical cancer.

PATIENTS AND METHODS

circSMARCA5 and miR-620 expressions were analyzed by qRT-PCR assay. The cell proliferation, cell cycle, migration, invasion abilities were measured by CCK-8 and colony formation, Flow cytometry, Wound-healing and transwell assays. In addition, the interaction between circSMARCA5 and miR-620 was accessed by luciferase reporter assay.

RESULTS

The results indicated that circSMARCA5 was downregulated in CC; overexpression of circSMARCA5 inhibited CC cell proliferation, migration and invasion, and induced cell cycle arrest. In addition, we found that circSMARCA5 could bind to miR-620 and significantly downregulated its expression. Furthermore, the results revealed that circSMARCA5 suppressed proliferation and invasion by miR-620 in CC.

CONCLUSIONS

We suggested that circSMARCA5/miR-620 regulatory axis is involved in the development of CC and may serve as a potential therapy target.