BACKGROUND:Polylactic acid(PLA)has good biocompatibility and a controllable degradation rate and is currently widely used in biomedical engineering.However,PLA has shortcomings such as low mechanical strength and insufficient biological activity,which limits its further application in bone tissue engineering. OBJECTIVE:To construct polylactic acid/polydopamine/tantalum(PLA/PDA/Ta)bone tissue engineering scaffolds,and explore their biosafety and in vitro osteogenesis. METHODS:A PLA scaffold with a porous structure was prepared through liquid crystal display light-curing technology.PLA/PDA scaffolds and PLA/PDA/Ta scaffolds were prepared by soaking PLA scaffolds in dopamine solution and dopamine-tantalum nanoparticle solution,respectively.The microstructure and water contact angle of scaffolds were characterized.MC3T3-E1 cells were co-cultured with PLA,PLA/PDA,and PLA/PDA/Ta scaffolds,respectively,and CCK-8 assay and live/dead cell staining were performed.After osteogenic differentiation,alkaline phosphatase,alizarin red staining,and osteogenic gene detection were performed. RESULTS AND CONCLUSION:(1)The scanning electron microscope results exhibited that the three kinds of prepared scaffolds had an interconnected porous three-dimensional structure,and the average pore diameter was 200 μm.The water contact angle of PLA/PDA/Ta scaffolds was lower than that of PLA and PLA/PDA scaffolds(P<0.05).(2)CCK-8 assay showed that compared with PLA and PLA/PDA scaffolds,PLA/PDA/Ta scaffolds could promote cell proliferation(P<0.05).Live/dead cell staining showed good cell proliferation in the three groups.(3)Alkaline phosphatase and alizarin red staining showed that compared with PLA and PLA/PDA scaffolds,PLA/PDA/Ta scaffolds could promote the expression of alkaline phosphatase and the formation of mineralized nodules.RT-qPCR showed that compared with PLA and PLA/PDA scaffolds,PLA/PDA/Ta scaffolds could enhance the mRNA expression of cell bone morphogenetic protein,Runx-2,and type I collagen(P<0.05,P<0.01).(4)The results showed that the PLA/PDA/Ta scaffold had excellent osteogenic activity and the ability to promote cell proliferation.

Exercise, as a non-pharmacological intervention, holds a pivotal role in metabolic regulation, neuroplasticity, and immune homeostasis maintenance. However, human exercise studies are constrained by ethical limitations in tissue sampling, especially for key organs such as muscles and the brain. Meanwhile, rodent models like mice exhibit physiological differences in exercise patterns and metabolic rates from human. Despite these challenges, approximately 70% of human and mouse genes are conserved, providing a molecular basis for cross-species comparisons. This paper leverages the GEPREP database, which integrates human and mouse exercise transcriptomic data from multiple platforms, to conduct a comprehensive cross-species analysis of exercise-induced gene expression patterns. We employ a stringent data standardization process, including the conversion of orthologous genes and the filtering of low-expressing genes, to ensure the accuracy and reliability of the analysis. A mixed-effects model is utilized to assess differential gene expression across multiple cohorts, identifying genes that are significantly upregulated or downregulated in response to exercise. The analysis reveals a complex pattern of gene expression, with a significant number of genes showing conserved responses between humans and mice, particularly in acute aerobic exercise, where genes such as ATF3, PPARGC1A, and ANKRD1 are commonly upregulated. These genes are implicated in muscle stress response, metabolic regulation, and muscle adaptation, highlighting the shared molecular pathways activated by exercise across species. However, the study also uncovers substantial species-specific differences in gene expression, especially in chronic aerobic exercise, where the number of divergently regulated genes increases. These differences suggest that while some fundamental biological processes are conserved, the specific regulatory mechanisms and gene expression patterns can vary significantly between humans and mice. Functional enrichment analysis further reveals that conserved genes are involved in muscle development, inflammation regulation, and energy metabolism, while species-specific genes are associated with ion transport, extracellular matrix (ECM) organization, and muscle contraction, indicating the multifaceted impact of exercise on skeletal muscle function. The findings emphasize the importance of considering species-specific differences when interpreting results from animal models and translating them to human health applications. The study highlights the need for a more nuanced understanding of the molecular underpinnings of exercise-induced adaptations and underscores the value of cross-species comparative analyses in uncovering the evolutionary and functional basis of these responses. Future research should focus on integrating multi-omics data and expanding the analysis to include other tissues to provide a more comprehensive view of the systemic effects of exercise. Additionally, the development of species-specific gene editing models and the validation of key genes in exercise physiology will further enhance our understanding of the evolutionary logic behind exercise interventions. This study not only provides valuable insights into the molecular mechanisms of exercise-induced adaptations but also underscores the necessity of validating findings from animal models in human cohorts to ensure the reliability and applicability of translational research in exercise science. By addressing these aspects, the study aims to bridge the gap between basic research and clinical applications, ultimately contributing to the development of personalized exercise prescriptions and interventions that can effectively promote health and prevent diseases.

Objective To analyze the epidemiological characteristics of occupational hand-arm vibration disease (OHAVD) in Guangdong Province from 2006 to 2022. Methods The data of newly reported OHAVD cases and suspected occupational disease cases in Guangdong Province from 2006 to 2022 was collected from the Report Card of Occupational Diseases and Report Card of Suspected Occupational Diseases using Occupational Diseases and Health Hazard Factors Monitoring Information System under China Disease Prevention and Control Information System. Epidemiological characteristics of the newly reported OHAVD cases and related suspected occupational disease reports were analyzed. Results A total of 660 newly reported OHAVD cases were reported in Guangdong Province from 2006 to 2022. The number of cases showed a periodic fluctuating trend over the years. Males accounted for 98.64% of the newly reported OHAVD cases with a median age of 38 years and a median hand-transmitted vibration exposure period of 8.7 years. These cases were predominantly distributed in the Pearl River Delta region, including Zhongshan City, Dongguan City, Guangzhou City, Shenzhen City and Foshan City, accounting for 99.25%. The manufacturing enterprises had 98.79% of the cases, investment enterprises of Hong Kong, Macao and Taiwan merchants of China had 83.18% of the cases, and large- and medium-sized enterprises had 92.73% of the cases. The 660 cases were distributed in 440 enterprises, but there were some characteristics of group outbreaks. There were 20 enterprises (4.55% of the total number of enterprises) had more than three cases involving 219 cases (33.18%). There were five enterprises which had more than 10 cases and the cases number ranged from 12 to 56. Among 382 newly reported OHAVD cases from 2014 to 2022, 44.24% were identified as suspected occupational diseases before diagnosis, of which 59.76% (101/169) were determined by occupational health inspection institutions. Conclusion Newly reported OHAVD cases in Guangdong Province were aggregated in terms of regional distribution, industry, enterprise ownership, and enterprise scale, with a risk of group outbreaks. It is suggested to enhance the OHAVD prevention and control in male workers exposed to hand-transmitted vibrations in the Pearl River Delta's manufacturing enterprises.

Objective:To investigate the current status of endoscopic treatment for gastroesophageal varices in portal hypertension in China, and to provide supporting data and reference for the development of endoscopic treatment.Methods:In this study, initiated by the Liver Health Consortium in China (CHESS), a questionnaire was designed and distributed online to investigate the basic condition of endoscopic treatment for gastroesophageal varices in portal hypertension in 2022 in China. Questions included annual number and indication of endoscopic procedures, adherence to guideline for preventing esophagogastric variceal bleeding (EGVB), management and timing of emergent EGVB, management of gastric and isolated varices, and improvement of endoscopic treatment. Proportions of hospitals concerning therapeutic choices to all participant hospitals were calculated. Guideline adherence between secondary and tertiary hospitals were compared by using Chi-square test.Results:A total of 836 hospitals from 31 provinces (anotomous regions and municipalities) participated in the survey. According to the survey, the control of acute EGVB (49.3%, 412/836) and the prevention of recurrent bleeding (38.3%, 320/836) were major indications of endoscopic treatment. For primary [non-selective β-blocker (NSBB) or endoscopic therapies] and secondary prophylaxis (NSBB and endoscopic therapies) of EGVB, adherence to domestic guideline was 72.5% (606/836) and 39.2% (328/836), respectively. There were significant differences in the adherence between secondary and tertiary hospitals in primary prophylaxis of EGVB [71.0% (495/697) VS 79.9% (111/139), χ2=4.11, P=0.033] and secondary prophylaxis of EGVB [41.6% (290/697) VS 27.3% (38/139), χ2=9.31, P=0.002]. A total of 78.2% (654/836) hospitals preferred endoscopic therapies treating acute EGVB, and endoscopic therapy was more likely to be the first choice for treating acute EGVB in tertiary hospitals (82.6%, 576/697) than secondary hospitals [56.1% (78/139), χ2=46.33, P<0.001]. The optimal timing was usually within 12 hours (48.5%, 317/654) and 12-24 hours (36.9%, 241/654) after the bleeding. Regarding the management of gastroesophageal varices type 2 and isolated gastric varices type 1, most hospitals used cyanoacrylate injection in combination with sclerotherapy [48.2% (403/836) and 29.9% (250/836), respectively], but substantial proportions of hospitals preferred clip-assisted therapies [12.4% (104/836) and 26.4% (221/836), respectively]. Improving the skills of endoscopic doctors (84.2%, 704/836), and enhancing the precision of pre-procedure evaluation and quality of multidisciplinary team (78.9%, 660/836) were considered urgent needs in the development of endoscopic treatment. Conclusion:A variety of endoscopic treatments for gastroesophageal varices in portal hypertension are implemented nationwide. Participant hospitals are active to perform emergent endoscopy for acute EGVB, but are inadequate in following recommendations regarding primary and secondary prophylaxis of EGVB. Moreover, the selection of endoscopic procedures for gastric varices differs greatly among hospitals.

Acupuncture, a therapeutic treatment defined as the insertion of needles into the body at specific points (ie, acupoints), has growing in popularity world-wide to treat various diseases effectively, especially acute and chronic pain. In parallel, interest in the physiological mechanisms underlying acupuncture analgesia, particularly the neural mechanisms have been increasing. Over the past decades, our understanding of how the central nervous system and peripheral nervous system process signals induced by acupuncture has developed rapidly by using electrophysiological methods. However, with the development of neuroscience, electrophysiology is being challenged by calcium imaging in view field, neuron population and visualization in vivo. Owing to the outstanding spatial resolution, the novel imaging approaches provide opportunities to enrich our knowledge about the neurophysiological mechanisms of acupuncture analgesia at subcellular, cellular, and circuit levels in combination with new labeling, genetic and circuit tracing techniques. Therefore, this review will introduce the principle and the method of calcium imaging applied to acupuncture research. We will also review the current findings in pain research using calcium imaging from in vitro to in vivo experiments and discuss the potential methodological considerations in studying acupuncture analgesia.
Calcium ; Acupuncture Therapy ; Acupuncture ; Acupuncture Analgesia/methods* ; Acupuncture Points ; Technology

ObjectiveA rapid method for identification of chemical constituents in Baoyuantang reference sample was established in order to clarify the material basis of this formula. MethodBased on ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry（UPLC-Q-TOF-MS/MS） and self-established database information， the chemical components in Baoyuantang were systematically characterized and identified. The chromatography was performed on a Waters ACQUITY UPLC HSS T3 column（2.1 mm×100 mm， 1.8 μm） with mobile phase of 0.1% formic acid aqueous solution（A）-0.1% formic acid acetonitrile solution（B） for gradient elution（0-3 min， 2%-19%B； 3-8 min， 19%B； 8-8.1 min， 19%-22%B； 8.1-14 min， 22%-29%B； 14-16 min， 29%B； 16-32 min， 29%-45%B； 32-32.1 min， 45%-90%B； 32.1-35 min， 90%-95%B； 35-36 min， 95%-98%B； 36-37 min， 98%-2%B； 37-40 min， 2%B）. Based on electrospray ionization（ESI）， continuum data format was collected in both positive and negative ion modes with a scanning range of m/z 50-1 500. Chemical constituents in the decoction of Baoyuantang were systematically analyzed by UNIFI 1.9.4 software matching， control comparison， The Encyclopedia of Traditional Chinese Medicine（ETCM） database search and literature reports. ResultA total of 229 components were identified under negative ion mode and 181 under positive ion mode， with a total of 322 components after removing duplicates， including 116 triterpene saponins， 66 flavonoids， 19 organic acids， 6 gingerphenols， 6 gingerols， 5 gingerones， 10 amino acids， 7 saccharides， 5 coumarins and 82 other components. Among them， 83， 141， 39， 35 and 38 components were attributed to Ginseng Radix et Rhizoma， Glycyrrhizae Radix et Rhizoma， Astragali Radix， Cinnamomi Cortex and Zingiberis Rhizoma Recens， respectively. ConclusionIn this study， the rapid characterization and identification of multi-class components in Baoyuantang was realized， and it was confirmed that the material basis of this formula was mainly triterpenoid saponins， flavonoids， gingerols and organic acids， and the chemical composition was attributed and analyzed， which provided a reference for the subsequent quality control research.

Nutritional therapy is a core component of critically ill patient management,and the enteral route has become the preferred method due to its dual roles of nutrition and non-nutrition. The use of vasoactive medications makes enteral nutrition decisions more challenging for these patients. This review systematically examines the pathophysiological effects of vasoactive medications on gastrointestinal tract of critically ill patients,the current value and safety of enteral nutrition in this patient's population,summarizes the optimal strategies for implementing enteral nutrition in these patients for clinical reference.

Objective:To discuss the clinical curative effect and feasibility of the combination therapy of the minimally invasive percutaneous quantitative suture technique eight times and Kirschner wire elastic fixation in the treatment of mallet finger.Methods:A retrospective analysis was performed on patients with tendon zone Ⅰ rupture of tendinous mallet fingers who underwent surgery in the Department of Hand and Foot Microsurgery of Nanjing Jiangbei Hospital from July 2021 to June 2023. During the procedure, firstly, the extensor digitalis tendon in the zone Ⅰ was sutured percutaneous with 3-0 thread monofilament sutures in the "quantitative 8-stitch method " according to the pre-marked number sequence of 1 to 8, and fixed at the base of the distal phalanx via a constructed bone tunnel. Secondly, the distal interphalangeal joint (DIPJ) was fixed elastically with Kirschner wire, without damage to the articular surface. Four to five weeks after the operation, the Kirschner wire was removed, and flexion and extension of the affected finger were gradually increased. At the last follow-up, the range of motion (ROM) and the total action motion (TAM) of the finger were recorded, and the healthy side of the ROM and TAM slightly differed. Finger function was evaluated following the American Association of Hand Surgeons TAM system. It was divided into four grades: excellent, good, fair and poor. SPSS 15.0 software was used for statistical analysis. Measurement data conforming to normal distribution were expressed as Mean±SD, and a paired sample t-test was used for comparison between the affected finger and the corresponding healthy finger. Results:A total of 30 patients (30 digits) were enrolled, including 19 males and 11 females with the age of (38.5±4.3) years (14 to 71 years). All were single closed injuries. Time from injury to operation was (1.1±0.4) d (3 h to 7 d). The distance of tendon break was (8.4±0.5) mm (4 to 12 mm). Mallet finger deformities were all corrected postoperatively. There were no complications such as scar, exposed suture, nail tract infection, or nail removal on the dorsal side of the affected finger. All patients were followed up for (7.5±1.3) months (6-13 months). At the last follow-up, the ROM of DIPJ of the affected finger and the corresponding healthy finger were 43.28°±2.03° and 44.15°±1.12°, respectively, with no statistical significance ( t=1.32, P=0.084). TAM of the affected finger and the corresponding healthy finger were 240.15°±5.13° and 242.13°±3.11°, respectively, with no significant difference ( t=2.12, P=0.135). According to TAM system evaluation criteria, excellent in 27 cases, good in 3 cases, excellent and good rate was 100% (30/30). Conclusion:The combination of the minimally invasive percutaneous quantitative suture technique eight times and Kirschner wire elastic fixation has a satisfactory treatment outcome in the mallet finger, and there is no damage to the DIPJ surface. It is a simple, safe, effective method with minimal invasion.

Objective:To discuss the clinical curative effect and feasibility of the combination therapy of the minimally invasive percutaneous quantitative suture technique eight times and Kirschner wire elastic fixation in the treatment of mallet finger.Methods:A retrospective analysis was performed on patients with tendon zone Ⅰ rupture of tendinous mallet fingers who underwent surgery in the Department of Hand and Foot Microsurgery of Nanjing Jiangbei Hospital from July 2021 to June 2023. During the procedure, firstly, the extensor digitalis tendon in the zone Ⅰ was sutured percutaneous with 3-0 thread monofilament sutures in the "quantitative 8-stitch method " according to the pre-marked number sequence of 1 to 8, and fixed at the base of the distal phalanx via a constructed bone tunnel. Secondly, the distal interphalangeal joint (DIPJ) was fixed elastically with Kirschner wire, without damage to the articular surface. Four to five weeks after the operation, the Kirschner wire was removed, and flexion and extension of the affected finger were gradually increased. At the last follow-up, the range of motion (ROM) and the total action motion (TAM) of the finger were recorded, and the healthy side of the ROM and TAM slightly differed. Finger function was evaluated following the American Association of Hand Surgeons TAM system. It was divided into four grades: excellent, good, fair and poor. SPSS 15.0 software was used for statistical analysis. Measurement data conforming to normal distribution were expressed as Mean±SD, and a paired sample t-test was used for comparison between the affected finger and the corresponding healthy finger. Results:A total of 30 patients (30 digits) were enrolled, including 19 males and 11 females with the age of (38.5±4.3) years (14 to 71 years). All were single closed injuries. Time from injury to operation was (1.1±0.4) d (3 h to 7 d). The distance of tendon break was (8.4±0.5) mm (4 to 12 mm). Mallet finger deformities were all corrected postoperatively. There were no complications such as scar, exposed suture, nail tract infection, or nail removal on the dorsal side of the affected finger. All patients were followed up for (7.5±1.3) months (6-13 months). At the last follow-up, the ROM of DIPJ of the affected finger and the corresponding healthy finger were 43.28°±2.03° and 44.15°±1.12°, respectively, with no statistical significance ( t=1.32, P=0.084). TAM of the affected finger and the corresponding healthy finger were 240.15°±5.13° and 242.13°±3.11°, respectively, with no significant difference ( t=2.12, P=0.135). According to TAM system evaluation criteria, excellent in 27 cases, good in 3 cases, excellent and good rate was 100% (30/30). Conclusion:The combination of the minimally invasive percutaneous quantitative suture technique eight times and Kirschner wire elastic fixation has a satisfactory treatment outcome in the mallet finger, and there is no damage to the DIPJ surface. It is a simple, safe, effective method with minimal invasion.

Objective To investigate the distribution of pathogens and change of homology of Acinetobacter bau-mannii(AB)in intensive care units(ICUs)of partial medical institutions in Shanghai before and after the pandemic of coronavirus disease 2019(COVID-19).Methods Pathogens were isolated and identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry(MALDI-TOF MS),the whole genome of AB was sequenced using Illumina Miseq sequencing platform,and its genetic relationship was explored based on multilocus sequence typing(MLST)and core genome multilocus sequence typing(cgMLST).Results The total detection rate of patho-gens in ICU environment after the pandemic was lower than before the pandemic([6.10％,101/1 656]vs[10.77％,181/1 680];P＜0.05).Before and after the pandemic,the proportion of AB detected on the surface of bedding in the ICU environment remained at the highest level.After the pandemic,the ST types showed a diverse distribution.MLST_Pasteur results showed that 162 strains of AB were divided into 20 ST types,with ST2(80.25％,n=130)being the main type.MLST_Oxford results showed that there were 19 ST types among 162 strains,with ST208(37.04％,n=60)being the main type.The clustering analysis based on cgMLST showed that ST208_Oxford had closer genetic relationship with ST540_Oxford and ST369_Oxford after the pandemic.ST164_Pasteur clone changed from ST234_Oxford before the pandemic to ST1418_Oxford after the pandemic,and 2 new types of ST_Pasteurr and 11 new types of ST_Oxford were discovered.Conclusion The detection rate of pathogens from ICU environment after the pandemic is lower than before the pandemic,and the distribution of ST types is slightly different at the same detection sites before and after the pandemic.ST2_Pasteur/ST208_Oxford is still the dominant epidemic clone before and after the pandemic,but some alleles have changed.cgMLST is more accurate than MLST_Oxford and MLST_Pasteur in homology analysis,evolution,spread,and outbreak analysis.