BACKGROUND:The research of dental stem cells in the fields of regenerative medicine and tissue engineering has been deepening,bringing hope for the repair of tooth-related tissues and the treatment of systemic diseases.However,there is a lack of systematic research and analysis on the biological characteristics of dental stem cells in different age groups. OBJECTIVE:To explore the biological characteristics of the human deciduous tooth and permanent tooth pulp stem cells cultured in umbilical cord blood platelet lysate to provide a reliable basis for human platelet lysates to replace fetal bovine serum. METHODS:The pulp tissues of deciduous teeth,juvenile permanent teeth and adult permanent teeth were taken out and cultured in DMEM/F-12 medium supplemented with 10%fetal bovine serum or different concentrations(5%,10%and 15%)of human platelet lysates.Cell proliferation in the four groups was detected by cytometry.The optimal concentration of human platelet lysates was selected for subsequent experiments.Under the optimal concentration of human platelet lysates,human deciduous tooth and juvenile and adult permanent tooth pulp stem cells were cultured in vitro.The cell growth status was observed under the microscope.The specific antigen on the cell surface was detected by flow cytometry.The cell proliferation ability was tested by the cell counting method and CCK-8 assay.The cell differentiation ability in vitro was observed by a three-line differentiation assay. RESULTS AND CONCLUSION:(1)The cell proliferation rate of the 10%human platelet lysate group was the highest.(2)In all three groups,fusiform fibrous cells grew and expanded from around the tissue block.There was no significant difference between deciduous teeth and juvenile permanent tooth cells,but the adult permanent tooth cells were larger than the deciduous and juvenile permanent tooth cells of the same generation.(3)The results of flow cytometry showed that deciduous teeth,juvenile permanent teeth and adult permanent teeth conformed to the phenotypic characteristics of mesenchymal stem cells.(4)The proliferative capacity of adult permanent dental pulp stem cells was significantly lower than those of deciduous teeth and juvenile permanent dental pulp stem cells(P<0.01).(5)mRNA expressions of osteoblast-related genes alkaline phosphatase and bone morphogenetic protein 2,lipoprotein lipase and peroxisome proliferator-activated receptor γ2,mRNA expressions of chondroblast related gene type II collagen α1 and cartilage oligomeric matrix protein in adult pulp stem cells of permanent teeth were significantly lower than those of deciduous teeth and juvenile permanent teeth pulp stem cells(P<0.01).(6)Compared with adult dental pulp stem cells,human deciduous teeth and juvenile permanent teeth dental pulp stem cells have the stronger proliferative capacity and multidirectional differentiation potential,and are more suitable for clinical research and disease treatment.

Objective:We genetically modified our non-replicating vaccinia virus NTV to improve its immunogenicity.Methods:We constructed NTV-modified strain NTV-ΔF1L-C7L by homologous recombination of vaccinia virus based on CRISPR-Cas9 technology by inserting the C7L gene while deleting the F1L gene. The recombinant virus NTV-ΔF1L-C7L was then immunized with 10 7 PFU in BALB/c mice, and the levels of humoral and cellular immunity induced by NTV-ΔF1L-C7L were detected by ELISA and ELISpot method, respectively, and the levels of neutralizing antibodies were determined by the phage-reduced neutralization assay. Results:The PCR and western- blot identification proved that the F1L gene of the constructed NTV-modified strain NTV-ΔF1L-C7L was missing, while the C7L gene was inserted back in the region, and the C7L gene could be expressed normally, indicating that the recombinant virus was constructed correctly. After immunization of mice with NTV-ΔF1L-C7L, ELISA result showed that the recombinant virus NTV-ΔF1L-C7L induced a higher level of IgG antibody than NTV; ELISpot result also showed that the recombinant virus was able to induce a higher level of IFN-γ; and the result of plaque reduction neutralization test showed that the recombinant virus was able to induce a higher level of IFN-γ antibody than that of NTV.Conclusions:We correctly constructed the NTV gene-modified strain NTV-ΔF1L-C7L, which induced stronger humoral and cellular immunity compared with NTV, and provided reference data for the research and development of replacement products for smallpox or monkeypox vaccines.

Objective:To accurately ascertain the whole genome sequencing and the composition of open reading frames (ORFs) of non-replicating Tiantan strain of vaccinia virus (NTV) using next-generation long-read sequencing technology.Methods:NTV, obtained from our laboratory stock, was amplified and purified on chicken embryo fibroblast cells(CEFs), and the full-length genomic nucleic acid of NTV was extracted. The PacBio HiFi sequencing platform was utilized for de novo assembly to obtain the complete genomic sequence of NTV. Using a homology annotation strategy, we identified its ORF composition and compared it with known non-replicating vaccinia virus strains. Results:The total length of NTV′s genome was 171 729 bp, with a GC content of 33%. Its unique inverted terminal repeat (ITR) region comprised hairpin structures, two tandem repeat regions, and three non-repeat regions. NTV contained 166 ORFs, with major differences observed in the ITR and its surrounding regions when compared to MVA-BN and NYVAC. These three strains shared a common set of 138 ORFs. NTV encoded six unique ORFs related to virus evasion of host antiviral response.Conclusions:This study accurately determines the whole genome sequencing and ORFs composition of NTV, and reveals its similarities and differences with other replication-deficient vaccinia virus strains, which pave a way for the development and application of the next generation of monkeypox vaccines and novel viral vectors.

Objective:Through the study of the cell biological characteristics and virulence in mice in vivo of three non-replicating vaccinia virus modified strains to provide reference for the development of smallpox/monkeypox vaccine replacement products.Methods:Replicating vaccinia virus Tiantan strain VTT and non-replicating Tiantan Vaccinia Strain NTV were studied in BHK-21/CEF and its modified strains NTV-C7L, NTV-△F1L-C7L, NTV-K1L were amplified, purified, and identified by Western blotting. The virulence and diffusivity of each strain in cells were evaluated by immune-plaque assay. The replication dynamics curves were used to compare the replication differences between the strains, and the weight loss was observed by intranasal route in the mouse model to compare the virulence levels of the viruses.Results:In this study, Western blotting result proved that the amplified and purified vaccinia virus strains were correct. Immunophagocytosis and replication kinetics showed that the replication capacity of the three NTV modified strains in CEF was similar to that of NTV. The diffusion ability and replication ability between Vero cells were improved, but the replication multiple was less than 100 times. The replication level of MRC-5 was significantly enhanced compared with that of NTV, and the replication ratio of NTV-C7L was more than 20000 times. The virulence in mice showed that the body weight of the three NTV modified strains had no statistical significance compared with that of NTV.Conclusions:The three NTV modified strains recovered their replication ability in human MRC-5 cells, but their virulence in mice was similar to that of NTV, which provided the preliminary conditions for being candidate strains of smallpox/monkeypox vaccine replacement products.

BACKGROUND On March 2022, the United States Food and Drug Administration(FDA) announced the approval of radiolabeled drug lutetium Lu 177 vipivotide tetraxetan for treatment of adult patients with prostate specific membrane antigen(PSMA)-positive metastatic castration-resistant prostate cancer who have been treated with androgen-receptor pathway inhibition and taxane-based chemotherapy. As PSMA is barely expressed on non-prostatic tissue, it has a very low background accumulation in healthy tissue, consequently, avoiding severe adverse drug reaction of lutetium Lu 177 vipivotide tetraxetan. A multicenter phase Ⅲ VISION study(NCT 03511664) showed that about 30% of patients with evaluable disease at baseline demonstrated an overall response with lutetium Lu 177 vipivotide tetraxetan plus standard care, compared to only 2% in the control arm. The high efficacy and mild adverse drug reaction of lutetium Lu 177 vipivotide tetraxetan cause opportunities for the healthcare systems and represent an important next step towards novel oncotherapy, but also cause great challenges in its clinical use due to lack of practical experience. Currently, data on the large sample and real-world comprehensive safety of lutetium Lu 177 vipivotide tetraxetan are still limited. Therefore, it is necessary to employ data mining algorithms to seek out the potential adverse event signals of lutetium Lu 177 vipivotide tetraxetan by post-marketing monitoring. METHODS FDA Adverse Event Reporting System(FAERS) is a publicly available, voluntary, and spontaneous reporting database. In the present study, the adverse events reported from the second quarter of 2022 to the fourth quarter of 2022 with lutetium Lu 177 vipivotide tetraxetan from FAERS were retrospectively analyzed. Seven types of datasets, including patient demographic and administrative information(DEMO), drug information(DRUG), therapy start dates and end dates for reported drugs(THER), adverse event results(OUTC), adverse event sources(PRSP), coded for the adverse events(REAC), and indications for use/diagnosis(INDI) were used. The reports of lutetium Lu 177 vipivotide tetraxetan were identified using generic name(LUTETIUM LU-177 VIPIVOTIDE TETRAXETAN in prod_ai column) and trade name(PLUVICTO in drug name column) in the DRUG dataset. The adverse event reports with the role_cod as the primary suspected(PS) were chose. Next, the report characteristics, demographic characteristics and onset time of lutetium Lu 177 vipivotide tetraxetan-associated adverse events were analyzed. The adverse events were coded using preferred terms(PT) derived from the standardized Medical Dictionary for Regulatory Activities 25.1(MedDRA), which contained 27 system organ classes(SOCs). Four algorithms, including reporting odds ratio(ROR), proportional reporting ratio(PRR), Bayesian confidence propagation neural network(BCPNN) and multi-item gamma Poisson shrinker(MGPS) were used to detect the signals. All the four data mining algorithms were based on the disproportionality analysis. An adverse event signal was detected only when it conformed to all of the four algorithms criteria simultaneously. RESULTS A total of 634 reports associated with lutetium Lu 177 vipivotide tetraxetan were considered. As a whole, the number of reports had increased gradually month-on-month, and 568(89.6%) reports occurred in the United States. The most common age and body weight groups were 61-80 years(75.4%) and 61-80 kg(50.9%), respectively. Most reports occurred within 30 d after administration of lutetium Lu 177 vipivotide tetraxetan, accounting for 41.5%. Based on 4 algorithms of ROR, PRR, BCPNN and MGPS, six effective signals at the PT level were detected, including anaemia(PT: 10002034), thrombocytopenia(PT: 10043554), laboratory test abnormal(PT: 10023547), platelet count decreased(PT: 10035528), full blood count decreased(PT: 10017413) and dry mouth(PT: 10013781). CONCLUSION When using lutetium Lu 177 vipivotide tetraxetan, it is important to strengthen clinical monitoring within one month and pay attentions to laboratory results including complete blood cell and platelet count. This study might provide powerful support for clinical monitoring of lutetium Lu 177 vipivotide tetraxetan.

Objective:To analyze the clinical characteristics of adult Chinese patients with syncope.Methods:This is a cross-sectional survey study. Patients with preliminary diagnosis of syncope in the Emergency Department, Geriatrics and Cardiology Outpatient Department, or Syncope Unit of 37 hospitals in 19 provinces, autonomous regions and the Hong Kong Special Administrative Region from June 2018 to March 2021 were included in this study. The clinical features of these patients with syncope were analyzed.Results:A total of 4 950 consecutive patients with syncope were included in this study. The age was (56.3±16.8)years, and 2 604 cases (52.6%) were male. The most common type of syncope was neurally mediated syncope (2 345 (47.4%)), followed by cardiac syncope (1 085 (21.9%)), orthostatic hypotensive syncope (311 (6.3%)), and unexplained syncope accounted for nearly one third (1 155 (23.3%)). Predisposing syncope was more common in patients under 65 years of age(2 066(72.4%) vs. 786(27.6%),χ 2=136.5, P<0.001). Presyncope was more common in patients with neurally mediated syncope (1 972(79.0%) vs.1 908(73.9%), χ 2=17.756, P<0.001). Premonitory symptoms were more common in women(1 837(80.0%) vs. 1 863(73.0%),χ 2=33.432, P<0.001). Presyncope syndrome was more common in patients under 65 years of age (2 482(77.8%) vs. 1 218(73.4%),χ 2=17.523, P=0.001). Cyanosis was more common in ≥65 years old patients (271(18.2%) vs. 369(12.7%), χ 2=23.235, P<0.001). Urinary incontinence was more common in old patients aged ≥65 years(252(15.2%) vs. 345(10.8%), χ 2=19.313, P<0.001). Family history was more common in patients with cardiogenic syncope compared with other types of syncope (264(24.3%) vs. 754(19.5%), χ 2=11.899, P=0.001). Hypertention(1 480(30.5%)), coronary heart disease(1 057(21.4%)), atrial flutter and atrial fibrillation(359(7.2%)), second degree atrioventricular block(236(4.8%)) were common complications of syncope. The proportion of patients with coronary heart disease was significantly higher in cardiac syncope than that of other types of syncope(417(38.4%) vs. 640(16.6%), χ 2=241.376, P<0.001). Other common complications included cerebrovascular diseases (551 (11.1%)) and diabetes mellitus (632(12.8%)). Conclusions:Neurally mediated syncope is the most common syncope in adult Chinese population. Patients with predisposing conditions and premonitory conditions are younger. Presyncope is more common in women. The proportion of family history and coronary heart disease is higher in patients with cardiogenic syncope.

OBJECTIVE: To explore the therapeutic effect of Bushen Yiqi Huoxue Decoction BYHD) in patients with diminished ovarian reserve (DOR). METHODS: A total of 180 patients with DOR diagnosed from December 2013 to December 2014 were equally assigned into progynova and duphaston (E+D) group, Zuogui Pill group and BYHD group with 60 cases in each by computerized randomization. Patients received E+D, Zuogui Pill or BYHD for 12 months, respectively. Follicle stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E₂), anti-Müllerian hormone (AMH), antral follicle count (AFC), ovarian volume, endometrial thickness, and the resistance indices (RIs) of ovarian arteries and uterine arteries were observed before and after treatment. RESULTS: Nine women (4 from the E+D group, 3 from the Zuogui Pill group, and 2 from the BYHD group) withdrew from the study. After 6 months, Zuogui Pill and BYHD significantly decreased FSH and LH and increased endometrial thickness and AMH (all P<0.01). BYHD also resulted in E₂ elevation (P<0.05), ovary enlargement (P<0.05), AFC increase (P<0.01), and RI of ovarian arteries decrease (P<0.05). After 12 months, further improvements were observed in the Zuogui Pill and BYHD groups (all P<0.01), but BYHD showed better outcomes, with lower FSH, larger ovaries and a thicker endometrium compared with the Zuogui Pill group (all P<0.01). However, E+D only significantly increased endometrial thickness (P<0.01) and no significant improvements were observed in the RI of uterine arteries in the three groups. CONCLUSIONS BYHD had a favorable therapeutic effect in patients with DOR by rebalancing hormone levels, promoting ovulation, and repairing the thin endometrium. The combination of tonifying Shen (Kidney), benefiting qi and activating blood circulation may be a promising therapeutic strategy for DOR.
Anti-Mullerian Hormone/pharmacology* ; Drugs, Chinese Herbal ; Female ; Follicle Stimulating Hormone ; Humans ; Luteinizing Hormone ; Ovarian Reserve

Objective:To explore the nutritional risk status and related factors of elderly inpatients.Methods:Using the convenient sampling method, 321 elderly stroke patients who were hospitalized in the neurology department of a ClassⅢ Grade A hospital from April to October 2018 were selected as the research objects for nutritional risk screening. Serum albumin (ALB) , serum prealbumin (PA) and other related nutritional indexes were recorded, and ADL, tooth, cognition, psychology and sleep of the patients were evaluated.Results:A total of 31.5% (101/321) of elderly stroke patients had nutritional risk. Among elderly stroke patients over 70 years old, 13.39% (43/321) had NRS-2002 ≥ 3 points. There were statistically significant differences in the incidence of nutritional risk among elderly stroke patients of different ages and degrees of dysphagia ( P<0.01) . Correlation analysis showed that the nutritional risk of elderly stroke patients was related to swallowing disorder, activity of daily living, intelligent mental state, and depression state ( P<0.05) . Conclusions:The older the elderly stroke patients, the higher the incidence of nutritional risk. Age, dysphagia, activity of daily living, BMI, intelligent mental state and depression are related to nutritional status, which should be paid attention to by medical staff and timely nutritional intervention should be given.

Objective:To investigate the blood pressure control and its influencing factors in hypertension patients with MS.Methods:Between January 2017 and December 2018, more than 78 000 residents aged 35-75 years selected through convenient sampling were invited to participant in China Patient-Centered Evaluative Assessment of Cardiac Event Million Persons Project in Fujian province, physical and laboratory tests were conducted for them, and their basic information were recorded. A total of 5 281 hypertension patients with MS were included in the study.Results:The treatment rate of hypertension patients with MS was 55.5%, and the control rate was 7.2%. The control rate was higher in patients who were older, women, had advanced education level, had history or family history of cardiovascular disease. The results of multivariate analysis indicated that living area (urban or rural), cardiovascular history, diabetes, urine protein, BMI had impacts on both treatment and control of hypertension. Family history of cardiovascular disease, age, self-management of hypertension, dyslipidemia, waist circumference and drinking had impacts on the treatments, and gender had effects on the control.Conclusions:The treatment rate of hypertension patients with MS was unsatisfactory and the control rate was low. Intervention should be strengthened in rural area, males and young age groups, and activity of self-management group of hypertension should be conducted regularly.

Kidney stones are a common urinary system condition that can progress to kidney disease. Previous studies on the association between tea consumption and kidney stones are inconsistent. A cross-sectional study to investigate the association between tea consumption and kidney stones was conducted from 2013 to 2014 and recruited 9,078 northern Chinese adults. A total of 8,807 participants were included in the final analysis. Participants' prevalence of kidney stones was 1.07%, 1.73%, and 2.25% based on their tea consumption frequency of never, occasionally, and often groups, respectively. Compared with the 'never' group, the odds ratios (95% confidence intervals) for the occurrence of kidney stones were 1.57 (1.00-2.46) and 1.65 (1.06-2.57) in the 'occasionally' and 'often' groups, respectively. After adjusting for sex, age, and other potential confounding factors, tea consumption still significantly increased the risk of kidney stones. Tea consumption is independently associated with an increased risk of kidney stones in the investigated population, suggesting that a decrease in the consumption of tea may be a preventive strategy for kidney stones.