OBJECTIVE: To explore the effect and mechanism of DNA methyltransferase 1 (DNMT1) knockout on the inhibition of acute myeloid leukemia (AML) by natural killer (NK) cells. METHODS: The peripheral blood NK cells of AML patients and controls were collected, and the mRNA and protein level of DNMT1 were measured by PCR and Western blot, respectively. The DNMT1 knockout mice were constructed to obtain NK^DNMT1-/- cells. The NK cells were stimulated with interleukin (IL)-12, IL-15, and IL-18 to construct memory NK cells, and then the interferon-γ (IFN-γ) levels were measured by ELISA. After co-culturing with memory NK cells and HL60 cells, the killing effect of NK^DNMT1-/- cells on HL60 cells was detected by LDH assay. Then, the HL60 cell apoptosis and NK cell NKG2D level were measured by flow cytometry. The perforin and granzyme B protein levels of NK cells were measured by Western blot. The AML model mice were constructed by injecting HL60 cells into the tail vein, meanwhile, memory NK cells were also injected, and then the mouse weights, CD33 positive rates, and survival time were detected. RESULTS: The mRNA and protein levels of DNMT1 in NK cells of AML patients were significantly higher than those in the control group (both P < 0.01), while the IFN-γ level induced by interleukin was significantly lower than that in the control group (P < 0.05). Compared with NK^DNMT1+/+ cells, the ability of NK^DNMT1-/- cells to secrete IFN-γ after interleukin stimulation was significantly increased (P < 0.05). The killing and apoptosis-inducing effects of NK^DNMT1-/- cells on HL60 cells were significantly stronger than those of NK^DNMT1+/+ cells (both P < 0.05). The NKG2D level and expression of perforin and granzyme B of NK^DNMT1-/- cells were significantly increased compared with NK^DNMT1+/+ cells (all P < 0.05). Compared with AML mice injected with NK^DNMT1+/+ cells, AML mice injected with NK^DNMT1-/- cells showed significantly increased body weight, decreased CD33 positive rate, and prolonged survival time (all P < 0.05). CONCLUSION Knocking out DNMT1 can enhance the inhibitory effect of NK cells on AML, which may be related to enhancing NK cell memory function.
Killer Cells, Natural/metabolism* ; Animals ; Leukemia, Myeloid, Acute ; Humans ; DNA (Cytosine-5-)-Methyltransferase 1 ; Mice ; Mice, Knockout ; HL-60 Cells ; Apoptosis ; Interferon-gamma/metabolism* ; Granzymes/metabolism* ; Perforin/metabolism* ; NK Cell Lectin-Like Receptor Subfamily K/metabolism*

Radiochemotherapy-induced oral mucositis (OM) is a common oral complication in patients with tumors following head and neck radiotherapy or chemotherapy. Erosion and ulcers are the main features of OM that seriously affect the quality of life of patients and even the progress of tumor treatment. To date, differences in clinical prevention and treatment plans for OM have been noted among doctors of various specialties, which has increased the uncertainty of treatment effects. On the basis of current research evidence, this expert consensus outlines risk factors, clinical manifestations, clinical grading, ancillary examinations, diagnostic basis, prevention and treatment strategies and efficacy indicators for OM. In addition to strategies such as basic oral care, anti-inflammatory and analgesic agents, anti-infective agents, pro-healing agents, and photobiotherapy recommended in previous guidelines, we also emphasize the role of traditional Chinese medicine in OM prevention and treatment. This expert consensus aims to provide references and guidance for dental physicians and oncologists in formulating strategies for OM prevention, diagnosis, and treatment, standardizing clinical practice, reducing OM occurrence, promoting healing, and improving the quality of life of patients.
Humans ; Chemoradiotherapy/adverse effects* ; Consensus ; Risk Factors ; Stomatitis/etiology*

OBJECTIVE: To investigate the association between ABO blood types and gestational diabetes mellitus (GDM) risk. METHODS: A prospective birth cohort study was conducted. ABO blood types were determined using the slide method. GDM diagnosis was based on a 75-g, 2-h oral glucose tolerance test (OGTT) according to the criteria of the International Association of Diabetes and Pregnancy Study Groups. Logistic regression was applied to calculate the odds ratios ( ORs) and 95% confidence intervals ( CIs) between ABO blood types and GDM risk. RESULTS: A total of 30,740 pregnant women with a mean age of 31.81 years were enrolled in this study. The ABO blood types distribution was: type O (30.99%), type A (26.58%), type B (32.20%), and type AB (10.23%). GDM was identified in 14.44% of participants. Using blood type O as a reference, GDM risk was not significantly higher for types A ( OR = 1.05) or B ( OR = 1.04). However, women with type AB had a 19% increased risk of GDM ( OR = 1.19, 95% CI = 1.05-1.34; P < 0.05), even after adjusting for various factors. This increased risk for type AB was consistent across subgroup and sensitivity analyses. CONCLUSION The ABO blood types may influence GDM risk, with type AB associated with a higher risk. Incorporating it-either as a single risk factor or in combination with other known factors-could help identify individuals at risk for GDM before or during early pregnancy.
Humans ; Female ; Pregnancy ; Diabetes, Gestational/etiology* ; ABO Blood-Group System ; Adult ; Prospective Studies ; Risk Factors ; Young Adult

OBJECTIVE: This study aimed to explore the association between body mass index (BMI) and mortality based on the 10-year population-based multicenter prospective study. METHODS: A general population-based multicenter prospective study was conducted at four sites in rural China between 2013 and 2023. Multivariate Cox proportional hazards models and restricted cubic spline analyses were used to assess the association between BMI and mortality. Stratified analyses were performed based on the individual characteristics of the participants. RESULTS: Overall, 19,107 participants with a sum of 163,095 person-years were included and 1,910 participants died. The underweight (< 18.5 kg/m ²) presented an increase in all-cause mortality (adjusted hazards ratio [ aHR] = 2.00, 95% confidence interval [ CI]: 1.66-2.41), while overweight (≥ 24.0 to < 28.0 kg/m ²) and obesity (≥ 28.0 kg/m ²) presented a decrease with an aHR of 0.61 (95% CI: 0.52-0.73) and 0.51 (95% CI: 0.37-0.70), respectively. Overweight ( aHR = 0.76, 95% CI: 0.67-0.86) and mild obesity ( aHR = 0.72, 95% CI: 0.59-0.87) had a positive impact on mortality in people older than 60 years. All-cause mortality decreased rapidly until reaching a BMI of 25.7 kg/m ² ( aHR = 0.95, 95% CI: 0.92-0.98) and increased slightly above that value, indicating a U-shaped association. The beneficial impact of being overweight on mortality was robust in most subgroups and sensitivity analyses. CONCLUSION This study provides additional evidence that overweight and mild obesity may be inversely related to the risk of death in individuals older than 60 years. Therefore, it is essential to consider age differences when formulating health and weight management strategies.
Humans ; Body Mass Index ; China/epidemiology* ; Male ; Female ; Middle Aged ; Prospective Studies ; Rural Population/statistics & numerical data* ; Aged ; Follow-Up Studies ; Adult ; Mortality ; Cause of Death ; Obesity/mortality* ; Overweight/mortality*

Objective:To investigate the diagnosis and strategy of individualized functional rhinoplasty based on the overall evaluation of the nasal cavity as a integration.Methods:A prospective study was carried out in the patients who underwent endoscopic functional rhinoplasty at the Department of Otorhinolaryngology, the First Affiliated Hospital of Chongqing Medical University from February 2018 to August 2021. The overall evaluation of the internal and external structure and function of the nasal cavity was performed before surgery, and the individualized surgical strategies were developed. According to the surgical strategy, nasal septum correction, inferior turbinate ablation, inferior turbinate fracture displacement, inferior turbinate submucous resection, dorsal extended cartilage graft, crooked nose correction, prosthesis or autologous cartilage implantation, hump reduction and osteotomy were performed to adjust the nasal function and aesthetics. Internal nasal valve (INV) angle, INV collapse grade, INV cross-sectional area, and external nasal valve effectiveness (ENVE) index were used to evaluate the structure of nasal valve area. Nasal obstruction symptom assessment (NOSE) scale and nasal resistance [including total nasal resistance (RT), nasal resistance differential ratio (R 1r)] was used to evaluate nasal ventilation function. Facial clinimetric evaluation questionnaire rhinoplasty module (FACE-Q RM), rhinoplasty outcome evaluation (ROE) scale, external nasal subunit measurement was used to evaluate nasal appearance, and self-rating depression scale (SDS) and self-rating anxiety scale (SAS) was used to evaluate psychological status. Finally, the correlation between patient satisfaction and subjective and objective parameters were analyzed. The data before and after operation were compared by paired t-test. Correlation was tested by Pearson analysis. Results:A total of 50 patients were included, including 18 males and 32 females, ranging in age from 23 to 52 years, mean age 35.7 years. All patients had symptoms of nasal congestion, of which 28 cases with crooked nose deformity, 12 cases with nasal valve stenosis, 6 cases with saddle nose deformity, and 4 cases with hump nose. Compared with preoperative, postoperative INV angle was significantly increased, INV collapse grade was decreased, INV cross-sectional area was increased, ENVE index was increased ( P<0.05). After operation, the NOSE score decreased, and nasal resistance showed that RT and R 1r decreased, indicating that nasal congestion symptoms were relieved significantly ( P<0.05). The postoperative FACE-Q RM and ROE scores increased, indicating that patients’ nasal appearance satisfaction increased ( P<0.05), external nasal subunit measurement showed that the upper nasal alar width and lower nasal alar angle were reduced ( P<0.05), the measured value of residual structure has no significant change. Postoperative SDS and SAS scores were significantly lower than preoperative ones, and the difference was statistically significant ( P<0.05).Overall satisfaction was improved( P<0.05). Pearson correlation analysis showed that patient satisfaction was positively correlated with INV angle, INV cross-sectional area, ENVE index, and subjective nasal shape score (FACE-Q RM, ROE), and negatively correlated with INV collapse grade, NOSE score, and nasal resistance measurement, but had no correlation with external nasal subunit measurement. Conclusion:Combined with the overall evaluation of nasal structure, nasal ventilation function and external nasal aesthetics, it is beneficial to develop the diagnosis and treatment strategy of individualized functional rhinoplasty, so as to improve patient satisfaction.

Objective:To investigate the diagnosis and strategy of individualized functional rhinoplasty based on the overall evaluation of the nasal cavity as a integration.Methods:A prospective study was carried out in the patients who underwent endoscopic functional rhinoplasty at the Department of Otorhinolaryngology, the First Affiliated Hospital of Chongqing Medical University from February 2018 to August 2021. The overall evaluation of the internal and external structure and function of the nasal cavity was performed before surgery, and the individualized surgical strategies were developed. According to the surgical strategy, nasal septum correction, inferior turbinate ablation, inferior turbinate fracture displacement, inferior turbinate submucous resection, dorsal extended cartilage graft, crooked nose correction, prosthesis or autologous cartilage implantation, hump reduction and osteotomy were performed to adjust the nasal function and aesthetics. Internal nasal valve (INV) angle, INV collapse grade, INV cross-sectional area, and external nasal valve effectiveness (ENVE) index were used to evaluate the structure of nasal valve area. Nasal obstruction symptom assessment (NOSE) scale and nasal resistance [including total nasal resistance (RT), nasal resistance differential ratio (R 1r)] was used to evaluate nasal ventilation function. Facial clinimetric evaluation questionnaire rhinoplasty module (FACE-Q RM), rhinoplasty outcome evaluation (ROE) scale, external nasal subunit measurement was used to evaluate nasal appearance, and self-rating depression scale (SDS) and self-rating anxiety scale (SAS) was used to evaluate psychological status. Finally, the correlation between patient satisfaction and subjective and objective parameters were analyzed. The data before and after operation were compared by paired t-test. Correlation was tested by Pearson analysis. Results:A total of 50 patients were included, including 18 males and 32 females, ranging in age from 23 to 52 years, mean age 35.7 years. All patients had symptoms of nasal congestion, of which 28 cases with crooked nose deformity, 12 cases with nasal valve stenosis, 6 cases with saddle nose deformity, and 4 cases with hump nose. Compared with preoperative, postoperative INV angle was significantly increased, INV collapse grade was decreased, INV cross-sectional area was increased, ENVE index was increased ( P<0.05). After operation, the NOSE score decreased, and nasal resistance showed that RT and R 1r decreased, indicating that nasal congestion symptoms were relieved significantly ( P<0.05). The postoperative FACE-Q RM and ROE scores increased, indicating that patients’ nasal appearance satisfaction increased ( P<0.05), external nasal subunit measurement showed that the upper nasal alar width and lower nasal alar angle were reduced ( P<0.05), the measured value of residual structure has no significant change. Postoperative SDS and SAS scores were significantly lower than preoperative ones, and the difference was statistically significant ( P<0.05).Overall satisfaction was improved( P<0.05). Pearson correlation analysis showed that patient satisfaction was positively correlated with INV angle, INV cross-sectional area, ENVE index, and subjective nasal shape score (FACE-Q RM, ROE), and negatively correlated with INV collapse grade, NOSE score, and nasal resistance measurement, but had no correlation with external nasal subunit measurement. Conclusion:Combined with the overall evaluation of nasal structure, nasal ventilation function and external nasal aesthetics, it is beneficial to develop the diagnosis and treatment strategy of individualized functional rhinoplasty, so as to improve patient satisfaction.

Objective To investigate the clinical efficacy of Wuhu Decoction plus Tingli Dazao Xiefei Decoction combined with Budesonide atomization for the treatment of pediatric bronchopneumonia with phlegm-heat obstructing the lung syndrome,and to observe its effect on inflammatory response.Methods Seventy children with bronchopneumonia of phlegm-heat obstructing the lung type were randomly divided into an observation group and a control group,with 35 cases in each group.The children in the control group were treated with atomized inhalation of Budesonide suspension,and the children in the observation group were treated with Wuhu Decoction plus Tingli Dazao Xiefei Decoction orally on the basis of treatment for the control group.Both groups were treated for a period of 7 days.The changes in the traditional Chinese medicine(TCM)syndrome scores and the serum levels of inflammatory factors of interleukin 6(IL-6),procalcitonin(PCT),and hypersensitive C-reactive protein(hs-CRP)in the two groups were observed before and after the treatment.Moreover,the clinical efficacy,time for the relief of symptoms and signs,and the incidence of adverse reactions in the two groups were compared.Results(1)After 7 days of treatment,the total effective rate of the observation group was 91.43%(32/35),and that of the control group was 71.43%(25/35).The intergroup comparison(tested by chi-square test)showed that the therapeutic efficacy of the observation group was significantly superior to that of the control group(P＜0.05).(2)After treatment,the TCM syndrome scores of the children in both groups were significantly lower than those before treatment(P＜0.05),and the decrease in the observation group was significantly superior to that in the control group(P＜0.01).(3)After treatment,the time for the relief of symptoms and signs such as wheezing,cough,lung rales,constipation and fever in the observation group was significantly shortened compared with that in the control group(P＜0.01).(4)After treatment,the serum IL-6,PCT and hs-CRP levels in both groups were significantly lower than those before treatment(P＜0.05),and the reduction in the observation group was significantly superior to that in the control group(P＜0.01).(5)The incidence of adverse reactions in the observation group was 5.71%(2/35)and that in the control group was 8.57%(3/35),while the difference was not statistically significant between the two groups(P＞0.05).Conclusion Wuhu Decoction plus Tingli Dazao Xiefei Decoction combined with Budesonide atomization exert certain effect for the treatment of pediatric bronchopneumonia with phlegm-heat obstructing the lung syndrome,which can effectively relieve the clinical symptoms and alleviate the inflammatory response of the children.

Ankylosing spondylitis (AS) combined with lower cervical fracture is often categorized into unstable fracture, with a high incidence of neurological injury and a high rate of disability and morbidity. As factors such as shoulder occlusion may affect the accuracy of X-ray imaging diagnosis, it is often easily misdiagnosed at the primary diagnosis. Non-operative treatment has complications such as bone nonunion and the possibility of secondary neurological damage, while the timing, access and choice of surgical treatment are still controversial. Currently, there are no clinical practice guidelines for the treatment of AS combined with lower cervical fracture with or without dislocation. To this end, the Spinal Trauma Group of Orthopedics Branch of Chinese Medical Doctor Association organized experts to formulate Clinical guidelines for the treatment of ankylosing spondylitis combined with lower cervical fracture in adults ( version 2024) in accordance with the principles of evidence-based medicine, scientificity and practicality, in which 11 recommendations were put forward in terms of the diagnosis, imaging evaluation, typing and treatment, etc, to provide guidance for the diagnosis and treatment of AS combined with lower cervical fracture.

Objective:To investigate the differences in clinical and electrocardiographic characteristics between carriers of SCN5A mutations and non-SCN5A mutations in fever-induced Brugada syndrome.Methods:This study is a retrospective cohort study. A total of 263 patients with fever-induced Brugada syndrome who were admitted to Renmin Hospital of Wuhan University from January 2000 to December 2023 were selected. Their clinical manifestations, electrocardiographic characteristics, and major adverse cardiovascular events (MACE) at the time of diagnosis and during the follow-up period were collected. Among them, 200 patients underwent next-generation sequencing. Based on the genetic variation results, after excluding other mutations, they were divided into SCN5A mutation group, non-SCN5A sodium-related mutation group, potassium/calcium mutation group, and no mutation group. Comparisons were made among these groups in terms of their clinical and electrocardiographic characteristics.Results:Among the 263 patients with fever-induced Brugada syndrome, the mean age was (41.9±17.6) years, with 80.6% (212/263) being male. The median follow-up duration was 53.0 months, and 13.7% (36/263) of the patients experienced MACE. The rate of SCN5A mutation was 34.5% (69/200), while the rates of non-SCN5A sodium-related mutations and potassium/calcium-related mutations were 4.5% (9/200) and 3.5% (7/200), respectively. The SCN5A mutation group was younger than the non-SCN5A sodium-related mutation group and the no mutation group (ages were (33.8±14.7), (49.8±11.6), (44.6±15.7) years, respectively, P<0.001). The SCN5A mutation group also had a longer PR interval than the no mutation group ((176.8±32.3) ms vs. (163.9±28.6) ms, P=0.034). The incidence of MACE was higher in the non-SCN5A sodium-related mutation group than that in the no mutation group (55.6% (5/9) vs. 9.1% (9/99), P=0.002). Conclusions:Fever-induced Brugada syndrome patients carrying non-SCN5A mutations exhibit distinct clinical and electrocardiographic characteristics compared to those with SCN5A mutations. These differences warrant attention in clinical practice.

Objective To monitor the susceptibility of clinical isolates to antimicrobial agents in tertiary hospitals in major regions of China in 2022.Methods Clinical isolates from 58 hospitals in China were tested for antimicrobial susceptibility using a unified protocol based on disc diffusion method or automated testing systems.Results were interpreted using the 2022 Clinical &Laboratory Standards Institute(CLSI)breakpoints.Results A total of 318 013 clinical isolates were collected from January 1,2022 to December 31,2022,of which 29.5％were gram-positive and 70.5％were gram-negative.The prevalence of methicillin-resistant strains in Staphylococcus aureus,Staphylococcus epidermidis and other coagulase-negative Staphylococcus species(excluding Staphylococcus pseudintermedius and Staphylococcus schleiferi)was 28.3％,76.7％and 77.9％,respectively.Overall,94.0％of MRSA strains were susceptible to trimethoprim-sulfamethoxazole and 90.8％of MRSE strains were susceptible to rifampicin.No vancomycin-resistant strains were found.Enterococcus faecalis showed significantly lower resistance rates to most antimicrobial agents tested than Enterococcus faecium.A few vancomycin-resistant strains were identified in both E.faecalis and E.faecium.The prevalence of penicillin-susceptible Streptococcus pneumoniae was 94.2％in the isolates from children and 95.7％in the isolates from adults.The resistance rate to carbapenems was lower than 13.1％in most Enterobacterales species except for Klebsiella,21.7％-23.1％of which were resistant to carbapenems.Most Enterobacterales isolates were highly susceptible to tigecycline,colistin and polymyxin B,with resistance rates ranging from 0.1％to 13.3％.The prevalence of meropenem-resistant strains decreased from 23.5％in 2019 to 18.0％in 2022 in Pseudomonas aeruginosa,and decreased from 79.0％in 2019 to 72.5％in 2022 in Acinetobacter baumannii.Conclusions The resistance of clinical isolates to the commonly used antimicrobial agents is still increasing in tertiary hospitals.However,the prevalence of important carbapenem-resistant organisms such as carbapenem-resistant K.pneumoniae,P.aeruginosa,and A.baumannii showed a downward trend in recent years.This finding suggests that the strategy of combining antimicrobial resistance surveillance with multidisciplinary concerted action works well in curbing the spread of resistant bacteria.