OBJECTIVES: This study investigated the effects of a polycaprolactone (PCL)-polyethylene glycol (PEG) scaffold incorporated with concentrated growth factor (CGF) on the adhesion, proliferation, and osteogenic differentiation of human periodontal ligament stem cells (hPDLSCs). METHODS: The PCL-PEG-CGF composite scaffold was fabricated using an immersion and freeze-drying technique. Its microstructure, mechanical properties, and biocompatibility were systematically characterized. The hPDLSCs were isolated through enzymatic digestion, and the hPDLSCs were identified through flow cytometry. Third-passage hPDLSCs were seeded onto the composite scaffolds, and their adhesion, proliferation and osteogenic differentiation were assessed using CCK-8 assays, 4',6-diamidino-2-phenylindole (DAPI) staining, alkaline phosphatase (ALP) staining, alizarin red staining, and Western blot analysis of osteogenesis-related proteins [Runt-related transcription factor 2 (Runx2), ALP, and morphogenetic protein 2 (BMP2)]. RESULTS: Scanning electron microscopy revealed that the PCL-PEG-CGF composite scaffold exhibited a honeycomb-like structure with heterogeneous pore sizes. The composite scaffold exhibited excellent hydrophilicity, as evidenced by a contact angle (θ) approaching 0° within 6 s. Its elastic modulus was measured at (4.590 0±0.149 3) MPa, with comparable hydrophilicity, fracture tensile strength, and fracture elongation to PCL-PEG scaffold. The hPDLSCs exhibited significantly improved adhesion to the PCL-PEG-CGF composite scaffold compared with the PCL-PEG scaffold (P<0.01). Additionally, cell proliferation was markedly improved in all the experimental groups on days 3, 5, and 7 (P<0.01), and statistically significant differences were found between the PCL-PEG-CGF group and other groups (P<0.01). The PCL-PEG-CGF group showed significantly elevated ALP activity (P<0.05), increased mineralization nodule formation, and upregulated expression of osteogenic-related proteins (Runx2, BMP2 and ALP; P<0.05). CONCLUSIONS The PCL-PEG-CGF composite scaffold exhibited excellent mechanical properties and biocompatibility, enhancing the adhesion and proliferation of hPDLSCs and promoting their osteogenic differentiation by upregulating osteogenic-related proteins.
Humans ; Polyesters/chemistry* ; Periodontal Ligament/cytology* ; Polyethylene Glycols/chemistry* ; Stem Cells/cytology* ; Tissue Scaffolds ; Cell Proliferation ; Osteogenesis ; Cell Differentiation ; Cell Adhesion ; Bone Morphogenetic Protein 2/metabolism* ; Cells, Cultured ; Alkaline Phosphatase/metabolism* ; Core Binding Factor Alpha 1 Subunit/metabolism* ; Intercellular Signaling Peptides and Proteins/pharmacology* ; Tissue Engineering/methods*

Objective: To analyze the safety and effectiveness of different types of stents with the treatment of vertebraebasilar artery dissection aneurysms(VBADA). Methods : The clinical data of 80 patients with VBADA treated by intravascular intervention in the First Hospital of University of Science and Technology of China(Anhui Provincial Hospital) from February 2018 to November 2023 were retrospectively analyzed. Patients were divided into laser engraved stent group(n=34) and braided stent group(n=46) based on the type of stent used. O′Kelly-Marotta(OKM) grade was used to evaluate the embolization effect of aneurysms in DSA images, and a modified Rankin Scale(mRS) score was used to evaluate the clinical prognosis of patients. The baseline data, aneurysm characteristics, intraoperative and perioperative treatment details and postoperative follow-up details between the two groups were compared. Results : There was no significant difference in baseline data, mRS score, ischemic and hemorrhage complications and mortality between the two groups(allP>0.05). Compared with the laser engraved stent group, the mean diameter of aneurysms was larger(P<0.000 1) and the proportion of ruptured aneurysm(P<0.01), parent artery stenosis and beaded vascular lesions(P<0.05) and branch artery dissecting aneurysm were higher(P<0.01) in the braided stent group. Conversely, the proportion of coil-assisted embolization(P<0.000 1) and the immediate aneurysm occlusion rate(OKM C and D)(P<0.000 1) were lower. Finally, 21 patients were obtained by controlling for maximum diameter of aneurysms and whether coil-assisted embolization, the aneurysm occlusion rate half a year later in the braided stent group was higher than that in the laser engraved stent group(P<0.05), but the recurrence rate of postoperative aneurysm was lower than that of laser engraved stent group(P<0.05). It was worth noting that the cure rate and vascular remodeling rate of middle-large size VBADA which the maximum diameter being over 15 mm in the braided stent group reached 72.2%, and the whole effect was ideal. Conclusion Braided stents are relatively safe and effective in the treatment of VBADA and are significantly better than laser engraved stents in reducing VBADA recurrence and remodeling lesion vessels without increasing postoperative complication.

The occupational health issues of shift workers has received increasing attention in the field of occupational health, and discussed in this article through literature review on the health risks and management of shift work both domestically and internationally. Based on this, a series of impacts of shift work on the physiological and psychological health of workers, as well as their family and social life, are revealed. Combined with relatively mature regulations and policies in foreign countries, it is proposed that China should fully learn from the relevant experience of health management in shift work abroad, Strengthen research and explore effective management intervention measures to provide ideas for accelerating the development of scientifically feasible regulations and policies related to occupational health in shift work in China.

As an important force in promoting the transformation and upgrading of the national economy, the occupational health of the Internet industry's employees has received widespread attention. This paper examines the current situation of occupational health risks and management in the Internet industry at home and abroad, and on this basis reveals the physical and mental health problems of Internet industry employees. Combining the existing regulations, policies and standard documents at home and abroad, countermeasures are proposed to improve the relevant laws and regulations and their guidelines, implement relevant job design requirements, build a healthy working environment, optimise the work management system and carry out workplace health promotion, in order to provide ideas to accelerate the improvement of occupational health issues in the Internet industry.

The occupational health issues of shift workers has received increasing attention in the field of occupational health, and discussed in this article through literature review on the health risks and management of shift work both domestically and internationally. Based on this, a series of impacts of shift work on the physiological and psychological health of workers, as well as their family and social life, are revealed. Combined with relatively mature regulations and policies in foreign countries, it is proposed that China should fully learn from the relevant experience of health management in shift work abroad, Strengthen research and explore effective management intervention measures to provide ideas for accelerating the development of scientifically feasible regulations and policies related to occupational health in shift work in China.

As an important force in promoting the transformation and upgrading of the national economy, the occupational health of the Internet industry's employees has received widespread attention. This paper examines the current situation of occupational health risks and management in the Internet industry at home and abroad, and on this basis reveals the physical and mental health problems of Internet industry employees. Combining the existing regulations, policies and standard documents at home and abroad, countermeasures are proposed to improve the relevant laws and regulations and their guidelines, implement relevant job design requirements, build a healthy working environment, optimise the work management system and carry out workplace health promotion, in order to provide ideas to accelerate the improvement of occupational health issues in the Internet industry.

Objective To explore the value of multi-parameter spectral CT for differentiating grade G2-3 pancreatic neuroendocrine tumor(pNET)and pancreatic neuroendocrine carcinoma(pNEC).Methods Preoperative double-layer detector spectral CT(DLCT)data of 35 patients with pNET(pNET group,including 25 cases of G2 grade and 10 cases of G3 grade)and 17 patients with pNEC(pNEC group)were retrospectively analyzed.Conventional CT and spectral CT parameters were compared between groups,and those being significant different between groups according to univariate analysis were respectively incorporated into multivariate logistic regression to select the independent predictors for identifying grade G2-3 pNET and pNEC.Conventional CT model and spectral CT model were constructed,and the combined model was constructed based on the two.The efficacy of each model for distinguishing grade G2-3 pNET and pNEC was evaluated.Results CT values of lesions during venous phase(OR=0.939,P=0.025)and vascular invasion(OR=5.049,P=0.027)shown on conventional CT were both independent predictors,and conventional CT model was constructed,its area under the curve(AUC)for distinguishing grade G2-3 pNET and pNEC was 0.808.Normalized iodine concentration during venous phase(OR=0.603)and normalized effective atomic number during venous phase(OR=0.847)on spectral CT were both independent predictors(both P＜0.05),and spectral CT model was constructed.The AUC of spectral CT model was 0.894,higher than that of conventional CT model(Z=2.127,P=0.033).The AUC of combined model was 0.924,higher than that of conventional CT model(Z=2.302,P=0.021)but not significantly different with that of spectral CT model(Z=0.827,P=0.408).Conclusion Multi-parameter spectral CT could effectively differentiate grade G2-G3 grade pNET and pNEC.

Objective:To investigate the value of multimodal ultrasound features combined with peripheral blood inflammatory cell ratios in evaluating the efficacy of neoadjuvant chemotherapy (NAC) in breast cancer.Methods:A total of 106 breast cancer patients diagnosed and treated with NAC at the Second Affiliated Hospital of Anhui Medical University from May 2021 to April 2024 were retrospectively collected, resulting in the conclusion of 61 patients (61 masses) in the study. All patients underwent multimodal ultrasound and peripheral blood routine examinations before NAC and after two cycles of NAC treatment. The patients were divided into a major histological response (MHR) group and a non-major histological response (NMHR) group as indicators for evaluating NAC efficacy. The differences in multimodal ultrasound features and inflammatory cell ratios before NAC and after two cycles of NAC treatment between the MHR and NMHR groups were compared. Binary logistic multivariate regression analysis was performed to determine the independent predictors of NAC efficacy in breast cancer. ROC curves were plotted to evaluate the diagnostic efficacy of predicting NAC efficacy.Results:Among the 61 breast masses, 25 (40.98%) were in the MHR group, and 36 (59.02%) were in the NMHR group.Multivariate binary logistic regression analysis showed that the change rate of maximum tumor diameter after the second cycle (ΔD 2), change rate of vascular index after the second cycle (ΔVI 2), change rate of elastic strain ratio after the second cycle (ΔE-Strain 2), change rate of reverse imaging score after the second cycle (ΔI-imaging score 2), and platelet-to-lymphocyte ratio (PLR) before NAC were independent predictors of NAC efficacy ( OR=1.145, P=0.019; OR=1.055, P=0.016; OR=1.036, P=0.033; OR=1.276, P=0.016; OR=1.054, P=0.047). The area under the ROC curve (AUC) for the combined diagnosis of the above parameters was 0.928 (95% CI=0.866~0.990), with a sensitivity of 80.0% and a specificity of 91.7%. Conclusions:The combination of ΔD 2, ΔVI 2, ΔE-Strain 2, ΔI-imaging score 2 and PLR before NAC has high clinical application value for early prediction of NAC efficacy in breast cancer.

Objective To evaluate the detection performance of common strains and the antimicrobial binding capacity of four blood culture systems made by BMX-FA/N Plus,Zhengzhou Anto,Zhuhai DIER and Chongqing Zhongyuan.Methods According to the common pathogens of clinical bloodstream infections in Wuhan No.1 Hospital,ATCC standard isolates of Staphylococcus aureus,Streptococcus pneumoniae,Enterococcus faecalis,Escherichia coli,Pseudomonas aeruginosa,Haemophilus influenzae,Stenotrophomonas Maltophil,Bacteroides tenuis and Candida glabla were chosen to explore.Prefabricated bacterial suspension and sterile horse blood were injected into different brands of blood culture systems to simulate the blood samples of patients with non-antibiotic treatment and antibiotic treatment.Six commonly used clinical antibiotics,Imipenem,Piperacillin/Tazobactam,Cefoperazone/Sulbactam,Levofloxacin,Vancomycin and Micafungine,were added to the blood samples after simulated antibiotic treatment.The performance was evaluated by recording the positive bottles and the detection time of each brand culture systems within five days with and without antibiotic.Results In the absence of antibiotic,four blood culture systems showed 100％recovery on all of the pathogens.Staphylococcus aureus,Pseudomonas aeruginosa and Haemophilus influenzae were recovered earlier in DIER aerobic bottles than BMX-FA Plus aerobic bottles,and the differences were statistically significant(t=2.608,5.547,12.247,all P＜0.05).The time to detection of Staphylococcus aureus,Streptococcus pneumoniae,Enterococcus faecalis and Haemophilus influenzae in Zhongyuan anaerobic bottles was significantly faster than that of BMX-FA Plus anaerobic bottles,with an average shortening of 1.92～10.80 h,and the differences were statistically significant(t=30.187,5.367,33.068,24.855,all P＜0.05).When antibiotics added,BMX-FA Plus culture bottle showed 100％recovery to all the detecting pathogens with the peak concentration antibiotics except Cefoperazone/Sulbactam,while the recovery in Zhongyuan blood culture bottle also was 100％with peak concentration antibiotics of Piperacillin/Tazobactam,Levofloxacin and Micafunzin.The peak concentration of imipenem antibiotics in domestic bottles was only detected in Anto anaerobic bottles,with lower positive detection rate(66.7％)lower than that of BMX-FA Plus(100％)and a later detection,and the difference was statistically significant(t=-21.000,P=0.030).Conclusion In the absence of antibiotic interference,the positive detection rate of the above pathogens are the same for four blood culture systems,and the time to detection of DIER and Zhongyuan systems is shorter than that of BMX-FA/N Plus.In the presence of antibiotic interference,the detection ability to pathogens in BMX-FA/N Plus system is the best,followed by domestic Zhongyuan system.

Inflammation is the basic pathological process of a variety of diseases, which involved in the occurrence and development of female infertility-related diseases, especially in bacteria and viruses infection of reproductive system, resulting in infertility. However, inflammatory reactions and factors also exist in normal physiological processes, such as endometrial morphologic changes in menstrual cycles, follicle genesis, ovulation, luteinization, pregnancy, etc. In addition, inflammation is also involved in the occurrence of some reproductive endocrine and metabolic diseases, such as obesity, endometriosis, polycystic ovary syndrome and so on. In the past, the understanding to inflammation in reproductive system was mostly limited to the inflammatory diseases and resulted in fertility decline or sterility, infertility, and other problems, which was not comprehensive. This review summarized the normal physiological inflammation and disease-related inflammation in the reproductive system, and described the evaluation of inflammatory state, as well as relevant prevention and treatment suggestions.