[Head and Face Protection of the Health Care Workers in the Operating Room of Peking Union Medical College Hospital during the Corona Virus Disease-19 Pandemic].

Objective To investigate the understanding of the head and face protection of the health care workers in operating room of Peking Union Medical College Hospital during the corona virus disease-19(COVID-19) pandemic.Methods The knowledge of head and face protection of health care workers in the operating room was evaluated based on the non-registered questionnaires for protection measures collected on-line.Results The survey was conducted in two phases.In the first phase(COVID-19 outbreak),153 questionnaires were collected.In the second phase(when Beijing lowered the emergency response to level 3 and normalized the epidemic prevention and control),101 questionnaires were collected.The results showed that 98% of health care workers had used any form of protective devices during the pandemic and anesthesiologists had the highest usage rate(93.0%)of ear-loop face mask with eye shield.During the pandemic,health care workers mainly used goggles(71.2%)for protection to diagnose and treat the patients with fever and ear-loop face mask with eye shield(56.2%)for protection to diagnose and treat the non-fever patients.In the first-and second-phase survey,43% and 68% of health care workers still used protection,and they mainly used face shield(50.0% and 56.5%)and ear-loop face mask with eye shield(56.1% and 68.1%).Conclusions During the pandemic,more than 90% of the health care workers in the operating room of Peking Union Medical College Hospital were aware of head and face protection.Different healthcare workers in the operating room had different choices of head and face protection,and more than 40% of them would still keep such protection during the normalized stage of pandemic prevention and control.

Compound LM9, a novel MyD88 inhibitor, efficiently mitigates inflammatory responses and fibrosis in obesity-induced cardiomyopathy.

Mechanisms of cardiomyopathy caused by obesity/hyperlipidemia are complicated. Obesity is usually associated with chronic low-grade inflammation and may lead to the onset and progression of myocardial fibrosis and remodeling. TLR4/MyD88 signaling pathway, as a key regulator of inflammation, plays an important role in the pathogenesis of obesity-induced cardiomyopathy. We previously demonstrated that LM9, a novel MyD88 inhibitor, attenuated inflammatory responses and fibrosis in obesity-induced cardiomyopathy by inhibiting the formation of TLR4/MyD88 complex. In this study, we investigated the protective effects of LM9 on obesity-induced cardiomyopathy in vitro and in vivo. We showed that LM9 (5, 10 µM) significantly attenuates palmitic acid (PA)-induced inflammation in mouse peritoneal macrophages, evidenced by decreased expression of proinflammatory genes including TNF-α, IL-6, IL-1ß, and ICAM-1. In cardiac-derived H9C2 cells, LM9 treatment suppressed PA-induced inflammation, lipid accumulation, and fibrotic responses. In addition, LM9 treatment also inhibited PA-activated TLR4/MyD88/NF-κB signaling pathway. We further revealed in HEK293 cells that LM9 treatment blocked the TLR4/MyD88 binding and MyD88 homodimer formation. In HFD-fed mice, administration of LM9 (5, 10 mg/kg, ig, every other days for 8 weeks) dose-dependently alleviated inflammation and fibrosis in heart tissues and decreased serum lipid concentration. In conclusion, this study demonstrates that MyD88 inhibitor LM9 exerts protective effects against obesity-induced cardiomyopathy, suggesting LM9 to be a promising therapeutic candidate drug for the obesity-related cardiac complications.

Remedial dosing recommendations for delayed or missed doses of lamotrigine in pediatric patients with epilepsy using Monte Carlo simulations.

OBJECTIVE: This study investigated the effect of delayed or missed doses on the pharmacokinetics (PK) of lamotrigine (LTG) in children with epilepsy and established remedial dosing recommendations for nonadherent patients. METHODS: The Monte Carlo simulation based on a published LTG population PK model was used to assess the effect of different scenarios of nonadherence and the subsequently administered remedial regimens. The following three remedial approaches were investigated for each delayed dose: A) A partial dose was administered immediately, and the regular dose was administered at the next scheduled time. B) The delayed dose was administered immediately, followed by a partial dose at the next scheduled time. C) The delayed and partial doses were coadministered immediately, the next scheduled dose was skipped, and the regular dosing was resumed at the subsequent scheduled time. The most appropriate remedial regimen was that with the shortest deviation time from the individual therapeutic window. RESULTS: The effect of nonadherence on PK was dependent on the delay duration and daily dose, and the recommended remedial dose was related to the delay duration and concomitant antiepileptic drugs. Remedial dosing strategies A and B were almost equivalent, whereas C showed a larger PK deviation time. If one dose was missed, double doses were not recommended for the next scheduled time. CONCLUSIONS: Simulations provide quantitative insight into the remedial regimens for nonadherent patients, and clinicians should select the optimal regimen based on the status of patients.

[Retrospective Analysis of 16 Cases Receiving Cardiopulmonary Resuscitation in the Operating Room among 127 053 Anesthetics Undergoing Non-cardiac Surgeries].

Objective To identify the high-risk factors of cardiac arrest during non-cardiac surgery and to provide experience for the effective cardiopulmonary resuscitation (CPR). Method The baseline data,co-morbidities,causes of cardiac arrest,treatment responsees,and survivals of 16 patients undergoing CPR among 127 053 patients receiving non-cardiac surgeries in our center from January 2013 to December 2016 were retrospectively analyzed. Results The main causes of intraoperative CPR included the co-existing cardiovascular diseases,massive intraoperative blood loss/high-risk surgical procedures,and allergy-related factors. Nine patients survived after immediate CPR in the operating room,with a 30-day survival rate of 77.8%. Conclusions Intraoperative cardiac arrest is a rare but potentially catastrophic event during non-cardiac surgeries. The success rate of CPR decreases in elderly patients undergoing high-risk emergency surgeries,especially when massive blood loss occurs during the surgery.

[Adding Ondansetron in Morphine Intravenous Analgesia Pump for Prevention of Postoperative Nausea and Vomiting in Women].

Objective To evaluate the application of adding ondansetron in morphine intravenous analgesia pump for prevention of postoperative nausea and vomiting(PONV)in women. Methods Data of surgical female inpatients who received general anesthesia and postoperative intravenous analgesia with morphine in our center from January 1st,2013 to December 31st,2014 were retrospectively analyzed. Based on whether ondansetron was added,patients were divided into the observation group(n=834) and the control group(n=856). Outcome variables including morphine consumption,visual analogue scale(VAS) score,nausea score,and total times of vomiting within 48 hours after surgery were collected and compared. Results Age(t=0.432,P=0.665),morphine consumption during the first post-operative day(t=0.599,P=0.548) and during the second post-operative day(t=0.236,P=0.813),maximum VAS score of postoperative pain during movement during the first post-operative day [3(2,4) vs. 3(2,5);Z=1.850,P=0.064] and at rest during the second post-operative day [0(0,1) vs. 0(0,1);Z=1.511,P=0.131] were not significantly different between two groups. While the maximum VAS score of postoperative pain at rest during the first post-operative day [0(0,2) vs.0(0,2);Z=2.435,P=0.015] and during movement during the second post-operative day [3(1,3)vs.3(2,4);Z=3.445,P=0.001] were significantly different between two groups. The maximum score of postoperative nausea(χ2=9.810,P=0.020) and cumulative frequency of postoperative vomiting(Z=3.726,P=0.002)in the observation group were significantly lower than those in the control group during the first post-operative day;however,there was no significant difference during the second post-operative day(χ2=5.017,P=0.170;Z=0.000,P=1.000). Logistic regression analysis showed that adding ondansetron in morphine intravenous analgesia pump was an independent influencing factor of reduced postoperative nausea. The probability of nausea during the first post-operative day was 0.781 time(P=0.015)of that in the control group and 0.736 time(P=0.030)during the second post-operative day. Conclusion Adding ondansetron in morphine intravenous analgesia pump may reduce PONV in women.

miR-24 suppression of POZ/BTB and AT-hook-containing zinc finger protein 1 (PATZ1) protects endothelial cell from diabetic damage.

The regulatory transcriptional factor PATZ1 is abnormally up-regulated in diabetic endothelial cells (ECs) where it acts as an anti-angiogenic factor via modulation of fatty acid-binding protein 4 (FABP4) signaling. The aim of the present work was to elucidate the upstream molecular events regulating PATZ1 expression in diabetic angiogenesis. The bioinformatics search for microRNAs (miRNAs) able to potentially target PATZ1 led to the identification of several miRNAs. Among them we focused on the miR-24 since the multiple targets of miR-24, which have so far been identified in beta cells, cardiomyocytes and macrophages, are all involved in diabetic complications. miR-24 expression was significantly impaired in the ECs isolated from diabetic hearts. Functionally, endothelial migration was profoundly inhibited by miR-24 suppression in Ctrl ECs, whereas miR-24 overexpression by mimics treatment effectively restored the migration rate in diabetic ECs. Mechanistically, miR-24 directly targeted the 3'untranslated region (3'UTR) of PATZ1, and miR-24 accumulation potentiated endothelial migration by reducing the mRNA stability of PATZ1. Together, these results suggest a novel mechanism regulating endothelial PATZ1 expression based on the down-regulation of miR-24 expression caused by hyperglycemia. Interfering with PATZ1 expression via miRNAs or miRNA mimics could potentially represent a new way to target endothelial PATZ1-dependent signaling of vascular dysfunction in diabetes.

Predictors for Massive Blood Loss During Posterior Correction of Congenital Scoliosis in Pre-school Children:A Retrospective Observation.

Objective To investigate the predictors for massive blood loss during posterior correction of congenital scoliosis in pre-school children. Methods Totally 124 children under six years of age,who received posterior correction of congenital scoliosis,were divided into two groups according to the ratio of intraoperative blood loss (BL) and estimated blood volume (EBV). Massive blood loss was defined as BL/EBV>0.15,and minor or moderate blood loss as BL/EBV≤0.15. All the records,including demographics,intraoperative fluids,pre- or postoperative laboratory parameters,and the length of hospital stay,were compared between these two groups. Results There were 57 children in the moderate or minor blood loss group and 67 children in the massive blood loss group. When compared with moderate or minor blood loss group,children in massive blood loss group had significantly lower body weight,shorter body height,longer anesthesia period,and more autologous or allogeneic transfusion (P<0.05). Binary Logistic regression analysis showed that body weight lower than 15 kg was the independent predictor for massive blood loss (OR=0.435,95% CI=0.197-0.962). Conclusions The incidence of massive blood loss is about 54% in children under six years of age who have received posterior correction of congenital scoliosis. The body weight of lower than 15 kg is an independent predictor for massive blood loss during the surgery.

Genetic polymorphism of 15 Y chromosomal STR loci and haplotypes of Henan Han population.

We studied and established a DNA database of 15 Y-STRs (DYS438, DYS446, DYS391, DYS390, DYS458, DYS534, DYS426, DYS626, DYS504, DYS505, DYS576, DYS532, DYS594, DYS522, DYS540) in a population sample of 102 unrelated, healthy, male individuals of Henan Han population. Allelic frequencies and statistical parameters of Han population were calculated. Totally 90 alleles were observed, with the corresponding allelic frequencies ranging from 0.0098 to 0.9020. 102 haplotypes were found in the studied group, the haplotype diversity for 15 Y-STR loci was 1. The results of present study were valuable for human identification and paternity tests routine forensic applications in the region.

Evaluation of risk factors for arytenoid dislocation after endotracheal intubation: a retrospective case-control study.

OBJECTIVE: To investigate the risk factors for postoperative arytenoid dislocation. METHODS: From September 2003 to August 2013, the records of 16 patients with a history of postoperative arytenoid dislocation were reviewed. Patients matched in terms of date and type of procedures were chosen as the controls (n=16). Recorded data for all patients were demographics, smoking status, alcoholic status, preoperative physical status, airway evaluation, intubation procedures, preoperative laboratory test results, anesthetic consumption and intensive care unit stay. For arytenoid dislocation cases, we further analyzed the incidences of the left and right arytenoid dislocation, and the outcomes of surgical repair and conservative treatment. Categorical variables were presented as frequencies and percentages, and were compared using the chi-squared test. Continuous variables were expressed as means±SD and compared using the Student's unpaired t-test. To determine the predictors of arytenoid dislocation, a logistic regression model was used for multivariate analysis. RESULTS: Sixteen patients with postoperative arytenoid dislocation were enrolled, with a median age of 52 years. Most postoperative arytenoid dislocation patients (15/16, 93.75%) received surgical repair, except one patient who recovered after conservative treatment. None of the postoperative arytenoid dislocation patients were smokers. Red blood cell (P=0.044) and hemoglobin (P=0.031) levels were significantly lower among arytenoid dislocation cases compared with the controls. CONCLUSIONS: Non-smoking and anemic patients may be susceptible to postoperative arytenoid dislocation. However, neither of them was independent risk factor for postoperative arytenoid dislocation.

Simvastatin ameliorates synaptic plasticity impairment in chronic mild stress-induced depressed mice by modulating hippocampal NMDA receptor.

BACKGROUND: In our previous study, we showed simvastatin exerts an antidepressant effect and inhibits neuroinflammation. Given the role of synaptic impairment in depression development, we investigate the effect of simvastatin on synaptic plasticity in depression and the related mechanisms. METHODS: Electrophysiological analysis, Golgi staining, and transmission electron microscope were performed to analyze the effect of simvastatin on synaptic impairment in depression. In addition, the localization and reactivity of N-methyl-D-aspartate receptor (NMDAR) subunits and the downstream signaling were investigated to explore the mechanism of simvastatin's effect on synaptic plasticity. RESULTS: Simvastatin ameliorated the reduction of the magnitude of long-term potentiation (LTP) in Schaffer collateral-CA1, restored hippocampal dendritic spine density loss, improved the number of spine synapses, reversed the reduction in BrdU-positive cells in chronic mild stress (CMS)-induced depressed mice, and ameliorated NMDA-induced neurotoxicity in hippocampal neurons. Dysfunction of NMDAR activity in the hippocampus is associated with depression. Simvastatin treatment reversed the surface expression and phosphorylation changes of NMDAR subunits in NMDA-treated hippocampal neurons and depressed mice. In addition, simvastatin further increased the levels of mature BDNF, activating TrkB-Akt-mTOR signaling, which is critical for synaptic plasticity. CONCLUSIONS: These findings suggest that simvastatin can improve the dysfunction of NMDAR and ameliorate hippocampal synaptic plasticity impairment in depressed mice.

Effect of sinus membrane perforation on the survival of implants placed in combination with osteotome sinus floor elevation.

This study was conducted to evaluate implant survival with regard to effects of sinus membrane perforation that occurred during osteotome sinus floor elevation (OSFE). The study group consisted of 42 patients with edentulous posterior maxilla. Implants placement combined with OSFE without a grafting material was performed. All patients underwent a radiographic examination before surgery, to reveal the periimplant bone formation immediately after implant placement and 6 to 33 months later. Sinus membrane perforations were detected in 6 patients, and 6 implants were inserted in 6 sinus sites. No infection occurred in all sites, and all implants succeeded in the observation follow-up period. There was a 100% survival rate of implant in perforated sinuses, the same as in intact sinuses. Within the limits of this study, we can conclude that perforation of the sinus membrane does not compromise the short-term survival of dental implants placed in combination with OSFE.

Effects of repeated allopurinol administration on rat cytochrome P450 activity.

Allopurinol is a popular and widely-prescribed anti-hyperuricemic agent that has been implicated in drug interactions with substrates of several cytochrome P450 (CYP) enzymes. The effect of repeated allopurinol administration (20 mg/kg, once daily for 14 days) on metabolic activity of CYP was assessed in rats. This was a randomized, double-blind, two-way crossover study with a 4-week washout period between phases. The substrates used in this study were phenacetin (CYP1A2), tolbutamide (CYP2C9), omeprazole (CYP2C19) and dextromethorphan (CYP2D6). Validated HPLC-MS/MS was used to quantify all compounds. Our study showed that allopurinol administration inhibited CYP1A2 activity, causing a significant increase in AUC (0-infinity) (P < 0.01) and t1/2 (P < 0.05) of phenacetin, and a distinct decline in CL (P < 0.01). However, there were no significant differences of another three probe drugs in plasma concentrations and the corresponding pharmacokinetic parameters between the allopurinol-treated and normal saline-treated rats. The findings in this study suggested that allopurinol could inhibit CYP1A2 but did not influence CYP2C9, CYP2C19 and CYP2D6 enzymes.

An electrochemical sensor based on single-stranded DNA-poly(sulfosalicylic acid) composite film for simultaneous determination of adenine, guanine, and thymine.

Poly(sulfosalicylic acid) and single-stranded DNA composite (PSSA-ssDNA)-modified glassy carbon electrode (GCE) was prepared by electropolymerization and then successfully used to simultaneously determine adenine (A), guanine (G), and thymine (T). The characterization of electrochemically synthesized PSSA-ssDNA film was investigated by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The modified electrode exhibited enhanced electrocatalytic behavior and good stability for the simultaneous determination of A, G, and T in 0.1M phosphate buffer solution (PBS, pH 7.0). Well-separated voltammetric peaks were obtained among A, G, and T presented in the analyte mixture. Under the optimal conditions, the peak currents for A, G, and T increased linearly with the increase of analyte mixture concentration in the ranges of 6.5×10(-8) to 1.1×10(-6), 6.5×10(-8) to 1.1×10(-6), and 4.1×10(-6) to 2.7×10(-5)M, respectively. The detection limits (signal/noise=3) for A, G, and T were 2.2×10(-8), 2.2×10(-8), and 1.4×10(-6)M, respectively.

Dynamic monitoring of total plasma homocysteine in spontaneously hypertensive rats by LC-MS.

Hypertension has been recognized to be closely related to plasma homocysteine levels (tHcy). Spontaneously hypertensive rats (SHR) are used widely for hypertension research, but it is unclear whether hypertension is related to high levels of tHcy in rat plasma. To test whether hyperhomocysteinemia occurs in SHR we dynamically measured plasma total homocysteine (tHcy) in SHR by liquid chromatography-tandem mass spectrometry (LC-MS). This analytical method has good linearity within the range of 1-100 micromol/L for tHcy in rat plasma with a correlation coefficient of R = 0.9975. After dynamic monitoring (12 weeks) on the plasma tHcy in SHR and Wistar-Kyoto rats, we found that there was no significant difference in tHcy level between SHR and Wistar-Kyoto rats, which was 6.98 +/- 1.82 micromol/L and 8.04 +/- 1.64 micromol/L, respectively. And there was no significantly high level of plasma tHcy in SHR.

Implant-bone interface stress distribution in immediately loaded implants of different diameters: a three-dimensional finite element analysis.

PURPOSE: To establish a 3D finite element model of a mandible with dental implants for immediate loading and to analyze stress distribution in bone around implants of different diameters. MATERIALS AND METHODS: Three mandible models, embedded with thread implants (ITI, Straumann, Switzerland) with diameters of 3.3, 4.1, and 4.8 mm, respectively, were developed using CT scanning and self-developed Universal Surgical Integration System software. The von Mises stress and strain of the implant-bone interface were calculated with the ANSYS software when implants were loaded with 150 N vertical or buccolingual forces. RESULTS: When the implants were loaded with vertical force, the von Mises stress concentrated on the mesial and distal surfaces of cortical bone around the neck of implants, with peak values of 25.0, 17.6 and 11.6 MPa for 3.3, 4.1, and 4.8 mm diameters, respectively, while the maximum strains (5854, 4903, 4344 muepsilon) were located on the buccal cancellous bone around the implant bottom and threads of implants. The stress and strain were significantly lower (p < 0.05) with the increased diameter of implant. When the implants were loaded with buccolingual force, the peak von Mises stress values occurred on the buccal surface of cortical bone around the implant neck, with values of 131.1, 78.7, and 68.1 MPa for 3.3, 4.1, and 4.8 mm diameters, respectively, while the maximum strains occurred on the buccal surface of cancellous bone adjacent to the implant neck, with peak values of 14,218, 12,706, and 11,504 microm, respectively. The stress of the 4.1-mm diameter implants was significantly lower (p < 0.05) than those of 3.3-mm diameter implants, but not statistically different from that of the 4.8 mm implant. CONCLUSIONS: With an increase of implant diameter, stress and strain on the implant-bone interfaces significantly decreased, especially when the diameter increased from 3.3 to 4.1 mm. It appears that dental implants of 10 mm in length for immediate loading should be at least 4.1 mm in diameter, and uniaxial loading to dental implants should be avoided or minimized.

Establishment of the active catalytic domain of human PDGFRbeta tyrosine kinase-based ELISA assay for inhibitor screening.

Tyrosine kinases are emerging as frequent targets of primary oncogenic events and therefore represent an optimal focus of therapeutic intervention. In an effort towards therapeutic PDGFR inactivation, we expressed the catalytic domain of PDGFRbeta as a soluble active kinase using Bac-to-Bac expression system, and studied the correlations between PDGFRbeta activity and enzyme concentration, ATP concentration, substrate concentration and divalent cation type. And a convenient, effective and non-radioactive ELISA screening model is then established for identification of the potential inhibitors targeting PDGFRbeta kinase. Of 500 RTK target-based compounds, TKI-30 was identified as a small molecule potential inhibitor of PDGFRbeta (IC(50)=0.34 microM). Further studies indicated that TKI-30 blocked PDGF-BB-induced autophosphorylation of PDGFRbeta in a dose-dependent manner in Swiss 3T3 cells and human umbilical vein smooth muscle cells (HUVSMCs). Moreover, it dose-dependently suppressed the PDGF-BB-induced proliferation in HUVSMCs and tube formation of HUVEC. Our data collectively indicated that PDGFRbeta-based ELISA assay is a new method available for screening inhibitors targeting PDGFRbeta kinase and TKI-30 is a potential novel anti-cancer agent worthy of being further investigated.

Characterization and permeation performance of novel organic-inorganic hybrid membranes of poly(vinyl alcohol)/1,2-bis(triethoxysilyl)ethane.

Bis(trialkylsilyl) precursor was used to modify polymer membranes for the first time. Novel organic-inorganic hybrid membranes of poly(vinyl alcohol) (PVA)/1,2-bis(triethoxysilyl)ethane (BTEE) were prepared through a sol-gel method for pervaporation dehydration of ethanol. The permeability and selectivity of the membranes were improved simultaneously. The physicochemical properties of the hybrid membranes were investigated. With increasing BTEE content, the amorphous region in the hybrid membranes increased and became more compact. Phase separation took place in the hybrid membranes containing abundant BTEE, and silica particles distributed in the PVA matrix homogeneously. Compared to PVA membranes, the hybrid membranes exhibit high thermal stability and improved separation performances. Silica-hybrids reduced significantly the swelling of PVA membranes in an aqueous solution. The Flory-Huggins interaction parameter of water with membranes chi13 increased with increasing BTEE content, whereas that of ethanol with membranes chi23 decreased. Diffusion behavior of water and ethanol through the membranes were analyzed using the Maxwell-Stefan equation. When BTEE content was below 6 wt%, diffusion coefficient of water D13 increased remarkably and that of ethanol D23 decreased slightly.

Discovering novel 3-nitroquinolines as a new class of anticancer agents.

AIM: To design and synthesize a novel class of antitumor agents, featuring the 3-nitroquinoline framework. METHODS: Based on the enzyme-binding features of Ekb1, introducing a nitro group at the 3-position of the quinoline core, a series of novel 3-nitroquinolines was designed and synthesized. The inhibition of epidermal growth factor receptor (EGFR) activity by these compounds was evaluated and analyzed by the sulforhodamine B assay for their inhibitory activities toward human epidermoid carcinoma (A431) cells and breast cancer (MDA-MB-468) cells, which are known to overexpress the EGFR kinase. RESULTS: A series of novel 3-nitroquinoline derivatives were synthesized and evaluated for their antiproliferative effect against the EGFR-overexpressing tumor cell lines. Several compounds for concentration-response studies showed prominent inhibitory activities with IC50 values in the micromolar or nanomolar range. The structure-activity relationship was discussed in terms of the inhibitory activity against the proliferation of 2 human carcinoma cell lines. CONCLUSION: This study was the first to identify new structural types of antiproliferative agents against the EGFR-overexpressing tumor cell lines by the incorporation of the nitro group at the 3-position of the quinoline core structure, providing promising new templates for the further development of anticancer agents.

A high-sensitivity electrochemical aptasensor of carcinoembryonic antigen based on graphene quantum dots-ionic liquid-nafion nanomatrix and DNAzyme-assisted signal amplification strategy.

In this work, we have developed an electrochemical aptasensor for high-sensitivity determination of carcinoembryonic antigen (CEA) based on lead ion (Pb2+)-dependent DNAzyme-assisted signal amplification and graphene quantum dot-ionic liquid-nafion (GQDs-IL-NF) composite film. We designed hairpin DNA containing CEA-specific aptamers and DNAzyme chains. In the presence of CEA, hairpin DNA recognized the target and performed a DNAzyme-assisted signal amplification reaction to yield a large number of single-stranded DNA. The GQDs-IL-NF composite film was immobilized on the glassy carbon electrode for the interaction with single-stranded DNA through noncovalent π-π stacking interaction. Therefore, the methylene blue-labeled substrate DNA (MB-substrate) was fixed on the electrode and exhibited an initial electrochemical signal. Under optimal conditions, the response current change was proportional to the concentration of CEA, demonstrating a wide linear range from 0.5fgmL-1 to 0.5ngmL-1, with a low detection limit of 0.34fgmL-1. Furthermore, the proposed aptasensor was successfully applied in determining CEA in serum samples, showing its superior prospects in clinical diagnosis.