Objective: To compare the effects of immediate versus delayed post-space preparation on the bond strength of fiber posts and the fracture resistance of roots after root canal obturation using iRoot SP and the single-cone technique, and to provide an experimental basis for the selection of the timing of clinical post-space preparation. Methods: This study was approved by the Medical Ethics Committee of the institution, and written informed consent was obtained from all participants. Seventy-two extracted human single-rooted premolars were randomly divided into two groups (n = 36 each): the immediate post-space preparation group (post-space preparation performed immediately after root canal obturation) and the delayed post-space preparation group (post-space preparation performed 1 week after root canal obturation). Cleanliness of the root canal walls was assessed with a dental microscope after preparation in both groups; the ultrastructural characteristics of the dentinal surface were examined via scanning electron microscopy; the fracture resistance of roots was measured with root fracture resistance tests; the bond strength of the fiber posts was measured with the thin-slice push-out test; and the bond failure modes were observed and analyzed under a stereomicroscope. Results: Under dental microscopy, the dentin surface of the immediate post-space preparation group appeared cleaner than that of the delayed post-space preparation group. Scanning electron microscopy revealed that most dentinal tubules remained open in the immediate post-space preparation group, while the tubules in the delayed post-space preparation group showed incomplete patency. The fracture resistance of the immediate post-space preparation group was (2 872 ± 241.5) N and that of the delayed post-space preparation group was (2 934 ± 353.1) N, with no statistically significant difference (t = -0.328, P = 0.751). The push-out bond strength of the immediate post-space preparation group (10.310 ± 2.907) MPa was significantly higher than that of the delayed post-space preparation group (7.917 ± 2.429) MPa, with a statistically significant difference (t = 4.457, P < 0.001). Analysis of failure modes showed that adhesive-to-dental interface failure was the predominant mode in both groups. Conclusion Following root canal obturation with iRoot SP using the single-cone technique, immediate post-space preparation yields superior fiber post bond strength compared to delayed post-space preparation, without compromising root fracture resistance.

In this work,a fluorescent probe PIN was synthesized using indole-3-carbohydrazide and pyrenecarboxaldehyde as raw materials.PIN showed weak fluorescence emission in aqueous solution with acetonitrile volume fraction of 70％.However,when Cu2+was added to this aqueous solution of PIN,a new fluorescence emission peak appeared at 495 nm,and the intensity of this peak gradually increased with the increase of concentration of Cu2+,and also caused a significant change in the fluorescence color of the solution.In contrast,the addition of 15 kinds of other common metal ions did not cause such change.The detection limit of PIN for Cu2+was 78.7 nmol/L,which was much lower than the maximum permitting level of Cu2+in drinking water in hygienic standard for drinking water in China.Therefore,PIN was a highly selective and sensitive fluorescence-enhanced probe for Cu2+.Meanwhile,the addition of Cu2+could also cause a new absorption peak at 440 nm in the ultraviolet-visible absorption spectrum of the aqueous solution of PIN,and meanwhile the colorless PIN solution changed into yellow,exhibiting the performance of PIN as a colorimetric probe for Cu2+.By fitting with the Levenberg-Marquardt algorithm equation,the binding ratio of PIN to Cu2+was 2:1,and the binding constant was 3.42×1012 L2/mol2.In addition,the binding mode of PIN with Cu2+was explored by using proton nuclear magnetic resonance(1H NMR)titration experiments and density functional theory simulations.The results showed that the addition of Cu2+could cause the aggregation of PIN molecules to form excimers,thus showing highly selective recognition.Finally,PIN was made into a simple test strip,which could achieve rapid and convenient fluorescence detection of Cu2+in actual water samples.

Objective:To establish a microfluidic chip-based digital PCR (cdPCR) method for detecting hepatitis B virus (HBV) RNA and evaluate its application in patients with chronic HBV infection.Methods:A total of 135 patients with chronic HBV infection were recruited from the First Affiliated Hospital of Fujian Medical University and stratified into two groups based on HBV DNA levels: HBV DNA>100 IU/ml ( n=85) and HBV DNA≤100 IU/ml ( n=50). Additionally, healthy individuals and subjects infected with other viruses ( n=15) served as controls. Primers and probes targeting the HBV pre-C/C region were designed to optimize the microfluidic cdPCR method, and its linear range, limit of detection (LOD), specificity, and precision were assessed. Serum HBV RNA levels were measured using the self-developed method and two commercial kits. Pearson correlation was applied to evaluate the relationships between HBV RNA and other HBV markers. Results:The optimized microfluidic cdPCR method featured a denaturation time of 10 seconds, an annealing/extension temperature of 62 ℃, and primer and probe concentrations of 0.3 μmol/L and 0.2 μmol/L, respectively. The method demonstrated a linear range of 103-10? copies/ml and an LOD of 102 copies/ml. The intra-assay coefficient of variation ( CV) for plasmid standards at 10? and 10? copies/ml were 1.06% and 0.82%, respectively, while the inter-assay CVs were 0.75% and 0.44%. Specificity analysis confirmed the absence of positive signals in sera from healthy controls and subjects infected with other pathogens. In the HBV DNA>100 IU/ml group, the detection rate of the self-developed cdPCR method was 81.18% (69/85), significantly higher than the 64.71% (55/85) achieved by commercial kit B ( P<0.016 7). However, in the HBV DNA≤100 IU/ml group, no significant differences were observed among the three methods ( P>0.05). HBV RNA levels were positively correlated with HBV DNA ( r=0.67), hepatitis B surface antigen ( r=0.53), and hepatitis B e antigen ( r=0.44) (all P<0.001). Conclusion:A microfluidic cdPCR assay for the quantitative detection of HBV RNA has been successfully developed. This assay demonstrates high sensitivity, specificity, and robust detection capability, even for low HBV DNA-concentration samples.

BACKGROUND: While emotional distress, encompassing anxiety and depression, has been associated with negative clinical outcomes, its impact across various clinical departments and general hospitals has been less explored. Previous studies with limited sample sizes have examined the effectiveness of specific treatments (e.g., antidepressants) rather than a systemic management strategy for outcome improvement in non-psychiatric inpatients. To enhance the understanding of the importance of addressing mental health care needs among non-psychiatric patients in general hospitals, this study retrospectively investigated the impacts of emotional distress and the effects of early detection and management of depression and anxiety on hospital length of stay (LOS) and rate of long LOS (LLOS, i.e., LOS >30 days) in a large sample of non-psychiatric inpatients. METHODS: This retrospective cohort study included 487,871 inpatients from 20 non-psychiatric departments of a general hospital. They were divided, according to whether they underwent a novel strategy to manage emotional distress which deployed the Huaxi Emotional Distress Index (HEI) for brief screening with grading psychological services (BS-GPS), into BS-GPS ( n = 178,883) and non-BS-GPS ( n = 308,988) cohorts. The LOS and rate of LLOS between the BS-GPS and non-BS-GPS cohorts and between subcohorts with and without clinically significant anxiety and/or depression (CSAD, i.e., HEI score ≥11 on admission to the hospital) in the BS-GPS cohort were compared using univariable analyses, multilevel analyses, and/or propensity score-matched analyses, respectively. RESULTS: The detection rate of CSAD in the BS-GPS cohort varied from 2.64% (95% confidence interval [CI]: 2.49%-2.81%) to 20.50% (95% CI: 19.43%-21.62%) across the 20 departments, with a average rate of 5.36%. Significant differences were observed in both the LOS and LLOS rates between the subcohorts with CSAD (12.7 days, 535/9590) and without CSAD (9.5 days, 3800/169,293) and between the BS-GPS (9.6 days, 4335/178,883) and non-BS-GPS (10.8 days, 11,483/308,988) cohorts. These differences remained significant after controlling for confounders using propensity score-matched comparisons. A multilevel analysis indicated that BS-GPS was negatively associated with both LOS and LLOS after controlling for sociodemographics and the departments of patient discharge and remained negatively associated with LLOS after controlling additionally for the year of patient discharge. CONCLUSION Emotional distress significantly prolonged the LOS and increased the LLOS of non-psychiatric inpatients across most departments and general hospitals. These impacts were moderated by the implementation of BS-GPS. Thus, BS-GPS has the potential as an effective, resource-saving strategy for enhancing mental health care and optimizing medical resources in general hospitals.
Humans ; Retrospective Studies ; Male ; Length of Stay/statistics & numerical data* ; Female ; Middle Aged ; Adult ; Psychological Distress ; Inpatients/psychology* ; Aged ; Anxiety/diagnosis* ; Depression/diagnosis*

Neuropathic pain, often featuring allodynia, imposes significant physical and psychological burdens on patients, with limited treatments due to unclear central mechanisms. Addressing this challenge remains a crucial unsolved issue in pain medicine. Our previous study, using protein kinase C gamma (PKCγ)-tdTomato mice, highlights the spinal feedforward inhibitory circuit involving PKCγ neurons in gating neuropathic allodynia. However, the regulatory mechanisms governing this circuit necessitate further elucidation. We used diverse transgenic mice and advanced techniques to uncover the regulatory role of the descending serotonin (5-HT) facilitation system on spinal PKCγ neurons. Our findings revealed that 5-HT neurons from the rostral ventromedial medulla hyperpolarize spinal inhibitory interneurons via 5-HT_2C receptors, disinhibiting the feedforward inhibitory circuit involving PKCγ neurons and exacerbating allodynia. Inhibiting spinal 5-HT_2C receptors restored the feedforward inhibitory circuit, effectively preventing neuropathic allodynia. These insights offer promising therapeutic targets for neuropathic allodynia management, emphasizing the potential of spinal 5-HT_2C receptors as a novel avenue for intervention.
Animals ; Neuralgia/physiopathology* ; Protein Kinase C/metabolism* ; Receptor, Serotonin, 5-HT2C/metabolism* ; Hyperalgesia/physiopathology* ; Mice, Transgenic ; Mice ; Spinal Cord/metabolism* ; Serotonin/metabolism* ; Male ; Neurons/metabolism* ; Mice, Inbred C57BL

Objective:To establish a microfluidic chip-based digital PCR (cdPCR) method for detecting hepatitis B virus (HBV) RNA and evaluate its application in patients with chronic HBV infection.Methods:A total of 135 patients with chronic HBV infection were recruited from the First Affiliated Hospital of Fujian Medical University and stratified into two groups based on HBV DNA levels: HBV DNA>100 IU/ml ( n=85) and HBV DNA≤100 IU/ml ( n=50). Additionally, healthy individuals and subjects infected with other viruses ( n=15) served as controls. Primers and probes targeting the HBV pre-C/C region were designed to optimize the microfluidic cdPCR method, and its linear range, limit of detection (LOD), specificity, and precision were assessed. Serum HBV RNA levels were measured using the self-developed method and two commercial kits. Pearson correlation was applied to evaluate the relationships between HBV RNA and other HBV markers. Results:The optimized microfluidic cdPCR method featured a denaturation time of 10 seconds, an annealing/extension temperature of 62 ℃, and primer and probe concentrations of 0.3 μmol/L and 0.2 μmol/L, respectively. The method demonstrated a linear range of 103-10? copies/ml and an LOD of 102 copies/ml. The intra-assay coefficient of variation ( CV) for plasmid standards at 10? and 10? copies/ml were 1.06% and 0.82%, respectively, while the inter-assay CVs were 0.75% and 0.44%. Specificity analysis confirmed the absence of positive signals in sera from healthy controls and subjects infected with other pathogens. In the HBV DNA>100 IU/ml group, the detection rate of the self-developed cdPCR method was 81.18% (69/85), significantly higher than the 64.71% (55/85) achieved by commercial kit B ( P<0.016 7). However, in the HBV DNA≤100 IU/ml group, no significant differences were observed among the three methods ( P>0.05). HBV RNA levels were positively correlated with HBV DNA ( r=0.67), hepatitis B surface antigen ( r=0.53), and hepatitis B e antigen ( r=0.44) (all P<0.001). Conclusion:A microfluidic cdPCR assay for the quantitative detection of HBV RNA has been successfully developed. This assay demonstrates high sensitivity, specificity, and robust detection capability, even for low HBV DNA-concentration samples.

Objective:To investigate the effect of genetic polymorphism of MTHFR C677T (rs1801133) on methotrexate (MTX) related toxicity in pediatric mature B-cell lymphoma patients. Methods:Fifty-eight intermediate and high risk patients under 18 years of age with mature B-cell lymphoma who received 5 g/m2 MTX (24 h intravenous infusion) in Sun Yat-sen University Cancer Center from August 2014 to December 2021 were included,and their toxicity of high-dose MTX (HD-MTX) were monitored and analyzed. Results:Among the 58 pediatric patients,the number of CC,CT,and TT genotypes for MTHFR C677T was 33,19 and 6,respectively. A total of 101 courses of HD-MTX therapy were counted,of which plasma MTX level>0.2 μmol/L at 48 h post-MTX infusion were observed in 35 courses,≤0.2 μmol/L in 66 courses. Inter-group comparison showed that plasma MTX level>0.2 μmol/L at 48 h post-MTX infusion increased the risk of developing oral mucositis (P<0.05). Compared with wild-type (CC genotype),patients in the mutant group (CT+TT genotype) were more likely to develop myelosuppression,manifested as anemia,leucopenia,neutropenia and thrombocytopenia. However,plasma MTX level at 48 h was not associated with MTHFR C677T gene polymorphism. Conclusion:The risk of developing oral mucositis in children with mature B-cell lymphoma is associated with plasma MTX concentration. Polymorphism of MTHFR C677T gene is not related to plasma MTX concentration in children with mature B-cell lymphoma,but is related to grade Ⅲ to Ⅳ hematological toxicity.

Purpose To development a model to predict mixed cerebral palsy(CP)in infants with periventricular white matter injury(PWMI).Materials and Methods This study retrospectively included infants with PWMI on MRI aged 6 to 24 months and were diagnosed as CP after age of 2 years in the First Affiliated Hospital of Henan University of Chinese Medicine,from September 2015 to October 2022.The eligible infants were divided into mixed group and spastic CP group.Multivariable Logistic regression model was used to select the MRI features associated with PWMI and mixed CP,and was internal validated by using the five-fold cross and repeated cross validation.Model performance was evaluated by the discrimination,calibration and decision curve.The correlation between independent MRI features and the gross motor function classification system levels was evaluated.Results A total of 135 infants with PWMI and CP were included in this study,100 with spastic CP,and 35 with mixed CP.Multivariable Logistic regression analysis found that the involvement of ventralateral of thalamus(OR=27.500,95%CI 8.293-90.942),posterior putamen(OR=13.700,95%CI 4.489-41.549),hippocampus(OR=7.200,95%CI 1.702-30.813)and caudate nucleus(OR 5.800,95%CI 1.973-16.950)were associated with PWMI and mixed CP.A prediction model was constructed using the above four MRI features.The model yielded an area under the receiver operating characteristic curve of 0.960(95%CI 0.934-0.988)and 0.95,0.96 in the five-fold cross and repeated cross validation,respectively.The model had good calibration(χ2=3.712,P=0.529)and clinical application.Furthermore,the four MRI variables were associated with gross motor function classification system levels(r=0.559,0.581,0.171,0.409,all P<0.05).Conclusion The model can early and accurately predict infants with PWMI at high risk of mixed CP.

Patients with severe trauma require an extremely timely treatment and transfusion plays an irreplaceable role in the emergency treatment of such patients. An increasing number of evidence-based medicinal evidences and clinical practices suggest that patients with severe traumatic bleeding benefit from early transfusion of low-titer group O whole blood or hemostatic resuscitation with red blood cells, plasma and platelet of a balanced ratio. However, the current domestic mode of blood supply cannot fully meet the requirements of timely and effective blood transfusion for emergency treatment of patients with severe trauma in clinical practice. In order to solve the key problems in blood supply and blood transfusion strategies for emergency treatment of severe trauma, Branch of Clinical Transfusion Medicine of Chinese Medical Association, Group for Trauma Emergency Care and Multiple Injuries of Trauma Branch of Chinese Medical Association, Young Scholar Group of Disaster Medicine Branch of Chinese Medical Association organized domestic experts of blood transfusion medicine and trauma treatment to jointly formulate Chinese expert consensus on blood support mode and blood transfusion strategies for emergency treatment of severe trauma patients ( version 2024). Based on the evidence-based medical evidence and Delphi method of expert consultation and voting, 10 recommendations were put forward from two aspects of blood support mode and transfusion strategies, aiming to provide a reference for transfusion resuscitation in the emergency treatment of severe trauma and further improve the success rate of treatment of patients with severe trauma.

Objective:To explore the current status of lipid-lowering therapy, the distribution of low-density lipoprotein cholesterol (LDL-C) levels and the risk assessment of cardiovascular events recurrence in patients with coronary heart disease (CHD) complicated by hypertension.Methods:This was a cross-sectional study. Patients with CHD combined with hypertension were hospitalized in the Department of Cardiology, General Hospital of Chinese People′s Liberation Army from August 5, 2008 to July 22, 2018 were included, and were divided into standard group and substandard group according to whether LDL-C reached the standard. Study data were obtained from inpatient coronary angiography records and electronic medical records database of Department of Cardiology, General Hospital of Chinese People′s Liberation Army, who used data from the first diagnosis of CHD. Clinical data of the selected patients were collected. Multivariate logistic regression model was used to analyze the associated factors of whether LDL-C reached the standard in CHD patients with hypertension.Results:A total of 18 800 patients were selected from 31 provinces/autonomous regions/municipalities directly under the central government in China, with Beijing accounting for the largest proportion (5 692 patients (30.28%)), followed by Hebei (3 621 patients (19.26%)), Henan (1 837 patients (9.77%)), and Shandong (1 618 patients (8.61%)). Among the selected patients, 1 493 had LDL-C<1.4 mmol/L (standard group), and 17 307 had LDL-C≥1.4 mmol/L (substandard group). Only 1 493 patients (7.94%) had LDL-C<1.4 mmol/L. There were 4 518 patients (24.03%), 4 366 patients (23.22%), 6 924 patients (36.83%) and 1 499 patients (7.97%) with LDL-C for 1.4-<2.0, 2.0-<2.5, 2.5-<3.8 and≥3.8 mmol/L levels, respectively. 17 855 patients (95.15%) were treated with statins, but only 1 334 patients (7.10%) were treated with statins and ezetimibe. Of the selected patients, 4 986 patients (26.52%) were at low risk, 6 515 patients (34.65%) were at intermediate risk, and 7 299 patients (38.82%) were at high risk. The combined lipid-lowering treatment rates of statin and ezetimibe in the middle-and high-risk patients were 7.43% (484/6 515) and 7.48% (546/7 299), respectively. The results of multivariate logistic regression analysis showed that increasing age, male, diabetes mellitus, stroke, and history of percutaneous coronary intervention (PCI) were positively associated with LDL-C standards in patients with CHD and hypertension, whereas obesity and acute myocardial infarction (AMI) were negatively associated with LDL-C standards (all P<0.01). Conclusions:The rate of achieving the standard LDL-C in patients with CHD combined with hypertension was low in China. Although the majority of patients had received moderate-intensity statin therapy, the proportion of statin-treated patients combined with ezetimibe was extremely low. The proportion of high-risk patients with recurrent cardiovascular events was higher in patients with CHD and hypertension in China, whereas the proportion of such patients receiving statin combined with ezetimibe lipid-lowering therapy was lower. This study also found that increasing age, male, diabetes mellitus, stroke, and history of PCI were positively associated with LDL-C standards, while obesity and AMI were negatively associated with LDL-C standards in patients with CHD and hypertension.