Tumor treating fields (TTF) therapy is an innovative tumor treatment modality. Currently, the TTF devices predominantly employ insulated ceramic electrodes as the electric field transmission medium, resulting in low energy transfer efficiency of the electric field and poor portability of the devices. This study proposed an innovative TTF transmission mode and independently designed a conducted-electrode TTF cell culture dish utilizing inert titanium materials. The electric field conduction characteristics were verified through finite element simulations and experimental tests. Finally, based on the self-manufactured conducted-electrode TTF cell culture dish, experiments on the proliferation inhibition of U87 tumor cells by TTF were conducted. The results demonstrated that under an applied TTF voltage of 10 V and frequency of 200 kHz, the electric field intensities within the medium for conducted and insulated electrodes are approximately 2.5 V/cm and 0.7 V/cm, respectively. Compared to conventional insulated TTF systems, the conducted-electrode TTF configuration exhibited a lower electrode voltage drop and a higher electric field intensity in the culture medium, indicating superior electric field transmission efficiency. Following 36 hours of treatment with conducted-electrode TTF on U87 cells, the proliferation inhibition rate reached approximately 50%, demonstrating effective suppression of tumor cell growth. This approach presents a potential direction for optimizing TTF treatment modality and device design.
Humans ; Electrodes ; Neoplasms/pathology* ; Cell Line, Tumor ; Cell Proliferation/radiation effects* ; Electric Stimulation Therapy/methods* ; Electromagnetic Fields

Objective:To evaluate the role of mitochondria-associated endoplasmic reticulum membranes (MAMs) regulated by protein tyrosine phosphatase interacting protein 51 (PTPIP51) in sevoflurane-induced necroptosis in hippocampal neurons of rats using the in vitro experiment.Methods:Primary cultured hippocampal neurons from fetal rats of Sprague-Dawley rats were inoculated in culture wells (100 μl/well ) or culture flasks (3 ml/bottle) at a density of 5×10 5 cells/ml at 7 days of culture and divided into 4 groups ( n=19 each) using a random number table method: control group (C group), sevoflurane group (Sev group), sevoflurane+ siRNA-PTPIP51 transfection group (Sev+ siPTPIP51 group), and sevoflurane+ nonsense siRNA transfection group (Sev+ siNC group). The neurons were placed in a culture incubator containing 2% sevoflurane and incubated at 37 ℃ for 5 h in Sev, Sev+ siPTPIP51 and Sev+ siNC groups. Then neurons were collected for determination of the cell survival rate (by MTT method), cytoplasmic calcium concentration ([Ca 2+ ] i) and necroptosis rate (by flow cytometry), expression of PTPIP51, receptor-interacting protein kinase 1 (RIPK1), RIPK3, and phosphorylated mixed lineage kinase domain-like protein (p-MLKL) (by Western blot) and for microscopic examination of the partial length, endoplasmic reticulum circumference, and mitochondrial circumference of MAMs (with a transmission electron microscope). Results:Compared with group C, the activity of neurons was significantly decreased, the [Ca 2+ ] i and necroptosis rate were increased, the expression of PTPIP51, RIPK1, RIPK3 and p-MLKL was up-regulated, and the ratio of partial length of MAMs to endoplasmic reticulum perimeter and partial length of MAMs to mitochondrial perimeter were increased in group Sev ( P<0.05). Compared with group Sev, the activity of neurons was significantly increased, the [Ca 2+ ] i and necroptosis rate were decreased, the expression of PTPIP51, RIPK1, RIPK3 and p-MLKL was down-regulated, and the ratio of partial length of MAMs to endoplasmic reticulum perimeter and partial length of MAMs to mitochondrial perimeter were decreased in group Sev+ siPTPIP51 ( P<0.05), and no statistically significant changes were found in the above parameters in group Sev+ siNC ( P>0.05). Conclusions:Up-regulation of PTPIP51 expression mediates structural changes in MAMs and is involved in the process of sevoflurane-induced necroptosis in hippocampal neurons of rats.

OBJECTIVE: To explore the clinical phenotype and genetic basis for a Chinese pedigree affected with Oral-facial-digital syndrome type I (OFD1). METHODS: A pedigree with OFD1 who presented at Hebei General Hospital on March 17, 2021 was selected as the subject. Clinical data of the child was collected. Trio-whole exome sequencing (trio-WES) was carried out for the proband and members of her pedigree, and candidate variant was verified by Sanger sequencing. RESULTS: The proband has featured hypotelorism, broad nasal root, flat nasal tip, lobulated tongue, tongue neoplasia, camptodactyly of left fifth finger, syndactyly of right fourth and fifth fingers, and delayed intellectual and language development. Trio-WES revealed that the proband and her daughter, sister and mother have harbored a heterozygous c.224A>G (p.Asn75Ser) variant of the OFD1 gene. The same variant was not found among healthy members from her pedigree. CONCLUSION The c.224A>G (p.Asn75Ser) variant probably underlay the OFD1 in this pedigree. Above discovery has enriched the spectrum of OFD1 gene variants.
Humans ; Female ; Pedigree ; Orofaciodigital Syndromes/genetics* ; East Asian People ; Phenotype ; Heterozygote ; Mutation ; China

Objective:To analyze the rules of Traditional Chinese Medicine (TCM) for treating diabetes based on the National Patent Database.Methods:In the patent search and analysis platform of the China National Intellectual Property Administration, search the invention patents of the TCM compounds for treating diabetes during January 1,2016-December 31,2020. The Ancient and Modern Medical Records Cloud Platform (V2.3.5) was used to conduct the statistics of Chinese materia medica frequency, the nature and meridian entry, and the analysis of association rules. The cluster analysis and factor analysis were carried out with the SPSS 25.0.Results:A total of 490 TCM compound patents were included, which involve 791 kinds of Chinese materia medica. For each patent, the number of the Chinese materia medica types was rough 13-14 in average. Remarkably, thirty kinds of Chinese materia medica with high frequencies were obtained, where tonic Chinese materia medica accounted for the largest number, followed by the heat-clearing Chinese materia medica. Among these Chinese materia medica the categories of nature are mainly flat, cold and slightly cold, while the flavors are mostly sweet, bitter and pungent, which mainly belongs to the three meridians of lung, kidney and spleen. As for the results of statistical analysis, the association rule analysis indicated that there were 17 effective kinds of Chinese materia medica pairs, such as Rhizoma Dioscoreae-Astragalus Membranaceus and Radix Rehmanniae Recen-Astragalus Membranaceus. Seven Chinese materia medica groups were derived by the cluster analysis, and 11 common factors were extracted through factor analysis. Conclusions:The TCM compounds for treating diabetes are based on clearing heat and moisturizing dryness, nourishing yin and fluid, supplemented by invigorating spleen and removing dampness, dispelling phlegm and dissolving blood stasis, purging fire and detoxification. Notably, in clinical application, phlegm, blood stasis, heat toxin and other pathological products are supposed to be the focus, must identifying the both symptoms and root causes.

This paper reported the genetic analysis of a pedigree in which three affected fetuses with short limbs were revealed by first-trimester ultrasonography in three consecutive pregnancies. Tissues of the second aborted fetus were collected and analyzed by chromosome karyotype analysis and whole exome sequencing. The results indicated compound heterozygous mutations of EX64-EX83 Del and c.8190G>T in the DYNC2H1 gene. Real-time fluorescence quantitative polymerase chain reaction and Sanger sequencing further confirmed that the two variants were inherited from the father and the mother with normal phenotypes, respectively. EX64-EX83 Del was a likely pathogenic variant and c.8190G>T was a variant of uncertain significance. Based on the above results and the medical history, it was highly suspected that the fetus had autosomal recessive short rib polydactyly syndrome type Ⅲ caused by compound heterozygous variants. Real-time fluorescent quantitative polymerase chain reaction and Sanger sequencing results of the third aborted fetus were consistent with the second fetus. Given the same phenotypes of fetuses in the second and third pregnancy, it was strongly suggested that the heterozygous variations of EX64-EX83 Del and c.8190G>T in the DYNC2H1 gene were the pathogenic variants in this pedigree.

Objective:To investigate the standardized training needs of new nurses in Yunnan province and provide scientific basis for the formulation of standardized training programs for new nurses.Methods:From December 2019 to September 2020, nurses from all 5 provincial tertiary Class A hospitals in Yunnan Province were selected as the research objects. A questionnaire survey was conducted among 712 nurses selected by the convenience sampling method, among which 456 were new nurses and 256 were senior nurses. The questionnaire was designed by the research team based on the Training Outline for Newly Recruited Nurses, which mainly included three dimensions of knowledge, skills and attitude.Results:The total score of new nurses and senior nurses on standardized training requirements for new nurses were (575.32 ± 85.76) points and (583.16 ± 86.32) points, which were above the average level. There was no statistically significant difference between the scores of training theme needs of new nurses and those of senior nurses ( t value was -1.168, P>0.05). Conclusions:The total score of standardized training needs of new nurses is above the average level, and the demand for knowledge dimension in standardized training of new nurses is the strongest. It is suggested to develop a systematic and scientific standardized training plan for new nurses according to the training needs and training methods.

ObjectiveTo investigate the mechanism of action of Sini powder in the treatment of liver cancer based on network pharmacology and molecular docking. MethodsTraditional Chinese Medicine Systems Pharmacology Database and Analysis Platform was used to obtain the compound and target of Sini powder, and the corresponding gene Symbol was obtained through Uniprot. The disease genes of liver cancer were obtained from Human Genome Database, and the genes with intersection with the target genes of Sini powder were screened out. Cytoscape3.7.1 software was used to draw the map of “traditional Chinese medicine (TCM)-compound-target” network. STRING was used to construct a protein-protein interaction (PPI) network, R studio software was used to conduct gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses on therapeutic targets, and then the results were visualized. The active component with the highest number of targets was selected as the ligand, and the target with the highest degree in the PPI network was selected as the receptor, so as to predict the structure of receptor-ligand complex and the amino acid residues that bind to each other. ResultsIn this study, 91 core targets and 141 relevant active components of Sini powder were screened out, among which quercetin and kaempferol were the main active components in the treatment of liver cancer. TP53 and HSP90AA1 were the main therapeutic targets. The GO enrichment analysis obtained 1007 items which met the screening criteria, which were mainly involved in the biological processes of antioxidation reaction, activity regulation of protein serine and threonine kinase, and cellular stress response. The KEGG enrichment analysis obtained 102 pathways, which mainly regulated the hepatitis B pathway and the PI3K-Akt signaling pathway in the prevention and treatment of liver cancer. The results of molecular docking showed a synergistic antitumor effect between the crystal structure domains VAL147, CYS220, GLU221, and PRO222 of quercetin-TP53. ConclusionThis study reveals the mechanism of action of Sini powder in the treatment of liver cancer by acting on multiple targets and signaling pathways, which provides a theoretical basis for biological experiments.

Novel Coronavirus Pneumonia (NCP) is a class B infectious disease, which is prevented and controlled according to class A infectious diseases. Recently, children′s NCP cases have gradually increased, and children′s fever outpatient department has become the first strategic pass to stop the epidemic. Strengthening the management of the fever diagnosis process is very important for early detection of suspected children, early isolation, early treatment and prevention of cross-infection. This article proposes prevention and control strategies for fever diagnosis, optimizes processes, prevents cross-infection, health protection and disinfection of medical staff, based on the relevant diagnosis, treatment, prevention and control programs of the National Health and Health Commission and on the diagnosis and treatment experience of experts in various provinces and cities. The present guidance summarizes current strategies on pre-diagnosis; triage, diagnosis, treatment, and prevention of 2019-nCoV infection in common fever, suspected and confirmed children, which provide practical suggestions on strengthening the management processes of children′s fever in outpatient department during the novel coronavirus pneumonia epidemic period.

Objective: To observe the effects of continuous nursing(CN) on rehabilitation of patients with hypertensive intracerebral hemorrhage (HICH) and to explore the effective interventive measures for CN. Methods: Totally 129 admitted HICH patients from January to December 2017 were selected and randomly divided into study group (63 cases) and control group (66 cases), the control group was handed with Handbook of stroke prevention and control before discharge, the study group received CN intervention, which included pre-discharge health education, family visits, patient management and video interview via WeChat App, group lecture and psychological support, self-nursing ability, motor function and ability of daily life and emotional condition were evaluated before and post discharge, and the disabled ratio 6 months after discharge between the 2 groups were compared. Results: The 2 groups with the scores of exercise of self-care agency scale (ESCA) were increased significantly compared with before discharge (all P<0.05) ; the study group with the ESCA scores 3 months and 6 months after discharge were significantly higher than the control group [3months:118.5±8.2 vs. 112.3±7.5; 6 months: 127.7±8.7 vs. 119.3±9.1] (all P<0.05) . Fugl Meyer score and Barthel index of the 2 group after discharge were both lower than the pre-discharge levels (all P<0.05); Fugl Meyer score and Barthel index of the study group 3 months and 6 months after discharge were significantly higher than the control group [3 months: Fugl Meyer score 73.3±7.3 vs. 69.4±6.9; Barthel index 56.5±8.0 vs. 51.8±7.3; 6 months: Fugl Meyer score77.6±8.0 vs. 74.5±7.2; Barthel index 67.5±8.7 vs. 63.0±7.4] (all t=2.291-3.454, P<0.05). Two groups with HAD score after discharge were significantly decreased compared with before discharge (P<0.05); the study group with the HAD-A and HAD-D scores 3 and 6 months after discharge were significantly lower than the control group[3 months: HAD-A 6.75±2.23 vs. 8.02±2.85; HAD-D 6.07±1.75 vs. 7.23±1.94; 6 months: HAD-A 5.93±2.04 vs. 6.84±2.37; HAD-D 5.86±1.47vs. 6.75±1.76] (all P<0.05) . The study group with the re-admission rate and disabled ratio within 6 months after discharge were both lower than the control group, but the differences without statistical significance (all P>0.05). Conclusion The HICH patients added with CN can significantly improve self-care ability, improve prognosis; patient management via WeChat App and group lecture & psychological support are effective measures to carry out CN.