Objective To comprehensively investigate the levels of exposure and distribution characteristics of trihalomethanes (THMs) in drinking water in Guangzhou City, and evaluate the health risks of different groups of children, adolescents and adults, and to provide data and evidence for protecting human health and promoting risk control of drinking water. Methods According to the technical requirements of the ^"Standards for Drinking Water Quality Testing Methods^" (GB/T 5750-2023), the concentration of THMs, including trichloromethane (TCM), bromodichloromethane (BDCM), dibromochloromethane (DBCM), and tribromomethane (TBM) in drinking water in Guangzhou City from 2023-2024 were detected. The health risk model recommended by USEPA was used for risk assessment．Results TCM, BDCM and DBCM were detected in the factory water and terminal water, with TCM contributing the most. There was a statistically significant difference (P<0.05) between the wet and dry seasons, and the concentration of TCM in the wet season was higher than that in the dry season. Among the multiple exposure factors, the amount of exposure through drinking water intake was much greater than that through skin absorption. The carcinogenic risk index of THMs for children, adolescents, and adults was 22.0×10^-6, 12.2×10^-6, and 11.4×10^-6, respectively, while the non-carcinogenic risk was less than 1. Conclusion The exposure risks of THMs in children, adolescents, and adults is within an acceptable range, but monitoring needs to be strengthened, with a particular focus on children.

Green prescription is a written prescription aimed at improving health by promoting physical activity and improving diet， with advantages such as high cost-effectiveness， strong feasibility， and minimal harm to patients. The theory of traditional Chinese medicine （TCM） green prescription integrates the health philosophy of "following rule of yin and yang， and adjusting ways to cultivating health"， the exercise philosophy of balancing yin-yang and the five elements， and the dietary philosophy of moderation and balance， which embody core TCM concepts such as treating disease before its onset and harmony between humans and nature. It has also developed traditional exercise practices like Tai Chi， Baduanjin， Wuqinxi， Yi-Gin-Ching， and Qigong， as well as dietary adjustments like medicated diet and herbal wines. However， it is believed that the TCM green prescription currently suffers from insufficient evidence-based research， low patient awareness and acceptance， and weak basic research. Based on this， it is proposed that large-sample clinical trials should be conducted in the future to improve the quality of evidence-based medicine， basic research can be carried out with the help of artificial intelligence and other methods in research design， the hospital information system （HIS） can be used for control at the implementation level， and publicity and patient education can be strengthened through the new media， so as to promote the development and application of the TCM green prescriptions in the field of global health treatment.

OBJECTIVES: Wild-caught Microtus fortis (M. fortis) at the age of 9-15 months can develop epithelial ovarian cancers similar to human epithelial ovarian cancers under natural conditions during experimental animal breeding, but its pathological types and biological characteristics remain unclear. This study aims to analyze the biological characteristics of spontaneous ovarian cancer in M. fortis, intending to develop M. fortis as an animal model for human epithelial ovarian cancer. METHODS: The female M. fortis (9-15 months old) with spontaneous ovarian cancer were selected as the experimental group, and healthy M. fortis from the same litter were selected as the control group. The ovarian pathological changes of the two groups were observed by dissection. Blood routine and biochemical indicators were measured by biochemical analysis. Hematoxylin and eosin (HE) staining was performed to observe the pathological changes in the ovarian cancer tissue of M. fortis. Immunohistochemical staining was used to detect the protein expression of common ovarian cancer markers, and real-time RT-PCR was used to analyze the transcription levels of ovarian cancer-related genes. RESULTS: Spontaneous ovarian cancer in M. fortis mainly affects both ovaries, with tumors appearing solid or cystic. HE staining and histopathological analysis confirmed that the ovarian tumors originated from ovarian surface epithelium. Compared to the control group, the experimental group showed significantly decreased hemoglobin (P<0.01), hematocrit (P<0.05), albumin (P<0.05), and blood glucose levels (P<0.01), while lymphocyte percentage (P<0.05), monocyte percentage (P<0.05), cholesterol (P<0.01), and progesterone (P<0.01) levels were significantly increased. Expression of ovarian cancer-related genes, including ID3, CDC42, RHOA, RB1CC1, NF1, PIN1, MIB1, PDS5A, MCM7, and MLH1, was significantly downregulated (all P<0.05), while PAX8 gene expression was significantly upregulated (P<0.05). Immunohistochemical results showed that Wilms' tumor gene 1 (WT1) protein was mainly distributed throughout the cell, with significantly higher expression in ovarian cancer M. fortis. Tumor protein 53 (TP53) was expressed in both healthy and ovarian cancer M. fortis and was distributed throughout the cell. Hepatocyte nuclear factor 1 beta (HNF1B) and progesterone receptor (PR) protein were highly expressed in the ovarian tissue of healthy M. fortis but were significantly reduced in the ovarian cancer M. fortis, though both were located in the cytoplasm. CONCLUSIONS Spontaneous ovarian cancer in M. fortis is serous ovarian cancer. Compared to healthy M. fortis, significant differences were observed in ovarian tissue morphology, biochemical indicators, ovarian cancer-related gene expression, and protein expression, which show similarity to the biological characteristics of human serous ovarian cancer. This suggests that M. fortis could be an ideal animal model for studying human serous ovarian cancer.
Female ; Ovarian Neoplasms/metabolism* ; Animals ; Carcinoma, Ovarian Epithelial ; Disease Models, Animal ; Humans ; Neoplasms, Glandular and Epithelial/metabolism* ; Ovary/pathology*

Multi-target analgesics with minimal side effects and high efficacy are a key research focus in addressing the global pain crisis. Using a molecular networking approach, five pairs of potent analgesic alkaloid enantiomers were isolated from the roots of Anacyclus pyrethrum (A. pyrethrum). Their structures were elucidated by comprehensive spectroscopic data analysis, including LR-HSQMBC and ¹H-¹⁵N HMBC, quantum ¹³C NMR DP4+ and ECD calculations, and single-crystal X-ray diffraction analysis. Anacyphrethines A (1) and B (2) are highly conjugated and polymethylated 6/6/6/6/5/7/5/5-fused octacyclic tetraazabic alkaloids possessing an unprecedented 8,14,18,24-tetraaza-octacyclo[16.8.2.1^1,23.0^4,28.0^5,17.0^9,16.0^11,15.0^21,27] nonacosane motif. Their biosynthetic pathways are proposed involving key aldol, hydroamination, and Schiff base reactions. All isolates showed potent analgesic effects in vivo. Even at a lower dose of 0.2 mg/kg, (±)-1 and (+)-1 still exhibited more potent analgesic activities than morphine. Interestingly, the racemic mixture (±)-1 showed stronger analgesic effect than either pure enantiomer alone at higher doses of 5 and 1 mg/kg; while, (±)-1 showed significant analgesic activities comparable to (+)-1 at lower doses of 0.2 and 0.04 mg/kg. (+)-1 had stronger analgesic effect than (-)-1 at five tested does. Further tests on 44 analgesic-related targets demonstrated that (+)-1 showed significant inhibitory effects against many ion channels such as TRPM8, Kv1.2, Kv1.3, and Ca_v2.1 with IC₅₀ values of 1.10 ± 0.26, 4.20 ± 0.07, 2.20 ± 0.24, and 10.40 ± 0.69 μmol/L, respectively, while (-)-1 primarily inhibited TRPC6, Kv1.2, and Kv1.3 ion channels with IC₅₀ values of 0.81 ± 0.05, 0.91 ± 0.04, and 1.50 ± 0.13 μmol/L, respectively, without affecting the opioid receptors, suggesting their non-opioid analgesic potentials. The molecular dockings provided structural guidance to develop potent non-opioid analgesics.

Magnetic stimulation has made significant strides in the treatment of psychiatric disorders. Nonetheless, current magnetic stimulation techniques lack the precision to accurately modulate specific nuclei and cannot realize deep brain magnetic stimulation. To address this, we utilized superparamagnetic iron oxide nanoparticles as mediators to achieve precise targeting and penetration. We investigated the effects of magnetic fields with varying frequencies on neuronal activity and compared the activation effects on neurons using a 10-Hz precise magneto-stimulation system (pMSS) with repetitive transcranial magnetic stimulation in mice. Oxytocin levels, dendritic morphology and density, and mouse behavior were measured before and after pMSS intervention. Our findings suggest that pMSS can activate oxytocinergic neurons, leading to upregulation of oxytocin secretion and neurite outgrowth. As a result, sociability was rapidly improved after a one-week pMSS treatment regimen. These results demonstrate a promising magneto-stimulation method for regulating neuronal activity in deep brain nuclei and provide a promising therapeutic approach for autism spectrum disorder.
Animals ; Autism Spectrum Disorder/physiopathology* ; Paraventricular Hypothalamic Nucleus/physiology* ; Disease Models, Animal ; Transcranial Magnetic Stimulation/methods* ; Male ; Social Behavior ; Mice ; Oxytocin/metabolism* ; Mice, Inbred C57BL ; Neurons/physiology*

Traditional Chinese Medicine(TCM)emphasizes syndrome differentiation and treatment,characterized by"maintaining the prescription if effective"and"changing the prescription if ineffective".Traditional randomized controlled trials(RCTs)are inadequate for evaluating the efficacy of dynamic treatment adjustments.The Sequential Multiple Assignment Randomized Trial(SMART)is an emerging adaptive research design that incorporates randomization at multiple stages,allowing for adjustments in subsequent interventions based on treatment responses.This approach is suitable for evaluating dynamic treatment regimens while retaining the low bias risk of traditional RCTs,making it highly promising for clinical research in TCM.This paper summarizes recent methodological advancements in SMART design,including different sample size estimation and statistical analysis methods for primary effect objectives,embedded adaptive intervention objectives,and optimization objectives,along with providing corresponding operational software.Additionally,it offers considerations for applying SMART design in TCM research,such as the selection of disease types,interventions,decision points,tailoring variables,sample size calculation,statistical methods,the importance of pilot trials,ethical considerations,and limitations.The aim is to promote the exploration and practice of this method in the field of TCM,thereby contributing to the generation of high-quality evidence-based evidence for TCM.

BACKGROUND:The cervical facet joint,as an important anatomical structure of the posterior column of the cervical spine,plays an important role in neck activity,stress transmission,and maintaining cervical stability. In recent years,anatomical and biomechanical studies have shown that asymmetry of cervical facet joints can cause degeneration of facet joints,which may be the main cause of cervical spine degeneration in young people. Existing research is mostly focused on adults,and there are also reports on preschool and school-age children in China,while there are few reports on the morphological parameters of cervical facet joints in adolescents.OBJECTIVE:Through three-dimensional reconstruction of the cervical facet joints in adolescents,measuring their relevant morphological parameters,and comparing them with those in children and adults,we explored the age-related changes in the morphological development of cervical facet joints,providing a theoretical basis for the diagnosis,treatment,and prevention of cervical spondylosis arising from cervical facet joints.METHODS:A total of 62 adolescents aged 13-18 years were selected to undergo spiral CT scan of cervical vertebrae and 3D reconstruction,requiring no bone destruction,tumor,deformity,or fracture,no changes in vertebrae morphology and structure,no previous spinal operations. The guardian's informed consent to the experimental protocol was obtained. By age group,group A was 13-14 years old;group B was 15-16 years old;group C was 17-18 years old. Thecorrelation morphometry and statistical analysis of C2-C7 facet joints were performed in adolescents of each group.RESULTS AND CONCLUSION:(1) In three groups of subjects,the facet joint surface heights and widths displayed decreasing and increasing trends in relation to the change of vertebra order. The facet joint surfaces on the inferior surface showed larger height and width compared to the corresponding indicators on the superior surface. (2) The intra-articular height of the articular process was lowest in C5 among the three groups of ages,and it showed a positive correlation with age. (3) Among the three groups,the gaps between the articular surfaces of the joints in C4-5 of group A,C3-4 of group B,and C4-5 of group C weresignificantly larger than the rest of the gaps in each group. Except for C4-5,there were no significant differences between the two groups. Except for C2-3,the remaining gaps between the vertebrae in group C were significantly larger than those in the two groups. (4) It is indicated that the morphology of the cervical facet joint surface gradually transitions from circular to elliptical as the vertebral order increases. In inter-group comparison,facet joint surface height is significantly affected by age compared to facet joint surface width. The area of the lower facet joint surface of each segment is greater than that of the upper facet joint surface,with only significant differences in the shape and area of C4-5 and C5-6. In addition,the minimum height of the facet joint is located at C5,and the significantly widened gap between the facet joint surfaces is mainly located at C3-4 and C4-5. Therefore,cervical instability often occurs at the mid-level.

Objective To explore the clinical application value of CT radiomics in predicting the grade of liver cancer and the prognosis after hepatectomy.Methods A retrospective selection was conducted on 385 liver cancer patients who underwent preoperative CT scans,and they were divided into training group(265 cases)and testing group(120 cases).The CT radiomics features were extracted and logistic regression was used to construct radiomics markers.A retrospective analysis was performed on 60 patients with liver cancer who underwent hepatectomy and regular follow-up.Results The area under the curve(AUC)of the radiomics signature in the train-ing group was 0.889.The AUC in the testing group was 0.941.For predicting prognosis after hepatectomy,the radiomics features with filter parameter of Filter 1.0 achieved optimal performance,with Dif.Scale1.2 being a good independent predictor of overall survival(OS).Conclusion CT radiomics has certain application value in predicting the grade of liver cancer and the prognosis after hepatectomy.

Objective:To analyze the efficacy of endovascular treatment for venous outflow tract obstruction after liver transplantation.Methods:A retrospective analysis was conducted on the data of 7 patients with venous outflow tract obstruction after liver transplantation admitted to Beijing Friendship Hospital, Capital Medical University from November 2020 to December 2024. Among them, there were 5 males and 2 females, with the age of (22.3±8.1) years. The primary diseases included 2 cases of Budd-Chiari syndrome, 1 case of hepatic veno-occlusive disease, 1 case of portal veno-hepatic sinus vascular disease, 1 case of ornithine carbamoyltransferase deficiency, 1 case of primary biliary cirrhosis, and 1 case of autoimmune cirrhosis. Analyze the patient's clinical manifestations, obstruction of venous outflow tract, hemoglobin levels within one week before and one week after the operation, endovascular treatment conditions, and intraoperative complications such as abdominal hemorrhage and vascular injury. Ultrasound was used to measure the depth of ascites and pleural effusion. All patients were followed up immediately after the operation through phone calls or follow-up visits. The clinical symptoms, abdominal vascular ultrasound, enhanced CT and survival status of the patients were followed up.Results:All 7 patients were diagnosed with venous outflow tract obstruction by intraoperative angiography, including 1 cases of inferior vena cava obstruction, 2 cases of hepatic vein obstruction, and 4 cases of vena cava combined with hepatic vein obstruction. A total of 12 endovascular treatments were performed on 7 patients. Among them, 4 patients received balloon dilation and angioplasty once, 1 patient received balloon dilation and angioplasty twice, 1 patient underwent hepatic vein stent implantation after 2 hepatic vein balloon dilation and angioplasty, and 1 patient underwent intrahepatic portosystemic shunt via jugular vein after 2 hepatic vein balloon dilation and angioplasty. The abdominal distensionof the patients were all relieved after the operation, the ascites and pleural effusion decreased, and the edema symptoms of the lower extremities disappeared. There were no intraoperative complications. The preoperative hemoglobin of 7 patients was (113.4±34.0) g/L, and the postoperative hemoglobin was (126.6±34.8) g/L, which increased significantly compared with that before the operation, and the difference was statistically significant ( t=-0.71, P=0.038). Seven patients were followed up for 6 to 24 months, with a median of 12 months. None of them had obvious symptoms including abdominal distension. Abdominal ultrasound and CT indicated that the blood flow of the transplanted liver was unobstructed, and no patient died. Conclusion:Venous outflow tract obstruction after liver transplantation can cause severe symptoms. Endovascular treatment is an effective treatment for venous outflow tract obstruction after liver transplantation.