Objective To investigate the regulatory effect of suppressor of cytokine signaling 1 (SOCS1) on the proliferation and apoptosis of myelodysplastic syndrome (MDS) cells SKM-1 and its potential mechanisms. Methods SOCS1 was overexpressed in SKM-1 cells by transfection with exogenous SOCS1-overexpressing plasmid. Cell viability, cell cycle and apoptosis were analyzed with CCK-8 and flow cytometry assays, respectively. Western blot was used to evaluate the expression of proteins related to the Janus kinase 2/signal transducer and activator of transcription (JAK2/STAT) signaling pathway. Additionally, a NOD/SCID mouse model of MDS was established to record mouse body weight and survival time, assessing the impact of the SOCS1 gene on the growth of SKM-1 cells in vivo. Results Transfection of the SOCS1-overexpressing plasmid significantly increased the mRNA and protein expression levels of SOCS1 in the MDS cell line SKM-1. Overexpression of SOCS1 remarkably reduced cell viability, inhibited cell proliferation, and promoted apoptosis of SKM-1 cells, which also decreased the expression of phosphorylated-JAK2 (p-JAK2), phosphorylated-STAT3 (p-STAT3), and p-STAT5 proteins. Furthermore, in vivo experiment results showed that the body weight and survival time of mice in the SOCS1 overexpression group were significantly better than those in the MDS model group, and the number of CD45⁺ SKM-1 cells in the peripheral blood was significantly lower than that in the MDS model group, indicating that SOCS1 overexpression could inhibit the activity of SKM-1 cells in mice. Western blot results verified the protein expression level of SOCS1 in the bone marrow of mice in the SOCS1 overexpression group was significantly higher than that in the MDS model group, while the protein expression levels of p-JAK2, p-STAT3, and p-STAT5 were significantly lower than those in the MDS model group. Conclusion SOCS1 inhibits the proliferation of MDS cell line SKM-1 and promotes its apoptosis by negatively regulating the JAK2/STAT signaling pathway, making it a potential therapeutic target for myelodysplastic syndromes.
Animals ; Humans ; Mice ; Apoptosis ; Body Weight ; Bone Marrow/metabolism* ; Janus Kinase 2/metabolism* ; Mice, Inbred NOD ; Mice, SCID ; Myelodysplastic Syndromes/metabolism* ; Phosphorylation ; STAT3 Transcription Factor/metabolism* ; STAT5 Transcription Factor/metabolism* ; Suppressor of Cytokine Signaling 1 Protein/metabolism* ; Cell Proliferation

Objective:To analyze the epidemiological characteristics and influencing factors of single-cigarette use and dual cigarette-cigar use in China.Methods:This study was a cross-sectional study that selected 85 638 urban and rural residents who met the inclusion criteria from the 2018 China Health Literacy Survey as research subjects. An analysis was conducted on 21 849 users of cigarettes and cigars among them. Due to the small number of individuals who exclusively used cigars (247 cases), the research subjects were divided into two categories: exclusive cigarette users and dual users of cigarettes and cigars. The groups were categorized by age (18-34 years, 35-54 years, ≥55 years), gender (male, female), education level (primary school and below, junior high school and high school, university and above) and annual household income (<20 000 yuan, 20 000-<80 000 yuan, ≥80 000 yuan) to compare the tobacco usage rate and conduct subgroup analyses for each subgroup. Multivariate logistic regression analysis was employed, incorporating general demographic characteristic information to explore the influencing factors of exclusive cigarette use and dual use of cigarettes and cigars, respectively.Results:The rate of exclusive cigarette use in our country was 24.3%, while the dual use rate of cigarettes and cigars was 0.9%. The exclusive cigarette use rate and the dual use rate of cigarettes and cigars among males were significantly higher than those among females (48.25% vs 2.48%, and 1.84% vs 0.06%) (both P<0.001). For males, the high-risk factors for exclusive cigarette use included living in urban areas ( OR: 1.37, 95% CI: 1.23-1.54), being Han ethnicity ( OR: 1.73, 95% CI: 1.51-1.98), and having an annual household income ≥20 000 yuan ( OR: 1.54, 95% CI: 1.38-1.82) while having a junior high school education or higher was a protective factor ( OR: 0.68, 95% CI: 0.52-0.90). Age≥35 years ( OR: 3.36, 95% CI: 2.62-4.32) and having a junior high school education or higher ( OR: 1.30, 95% CI: 1.02-1.67) were risk factors for dual use of cigarettes and cigars in males. Among females, living in urban areas ( OR: 1.53, 95% CI: 1.19-1.97) and being Han ethnicity ( OR: 5.96, 95% CI: 4.47-7.96) were risk factors for exclusive cigarette use, while having a university education or higher was a protective factor ( OR: 0.28, 95% CI: 0.18-0.42). However, for female dual use of cigarettes and cigars, no significant effects were observed for any demographic characteristics. Conclusions:The use rate of cigarettes alone in China is significantly higher than that of cigarette-cigar dual use, and the rates of cigarette use alone and cigarette-cigar dual use in men are significantly higher than those in women. Tobacco use is being affected by sociodemographic factors, among which place of residence, ethnicity and education level are the main influencing factors of cigarette use alone, and gender, age and education level are the main influencing factors of cigarette-cigar dual use.

Objective:To analyze the epidemiological characteristics and influencing factors of single-cigarette use and dual cigarette-cigar use in China.Methods:This study was a cross-sectional study that selected 85 638 urban and rural residents who met the inclusion criteria from the 2018 China Health Literacy Survey as research subjects. An analysis was conducted on 21 849 users of cigarettes and cigars among them. Due to the small number of individuals who exclusively used cigars (247 cases), the research subjects were divided into two categories: exclusive cigarette users and dual users of cigarettes and cigars. The groups were categorized by age (18-34 years, 35-54 years, ≥55 years), gender (male, female), education level (primary school and below, junior high school and high school, university and above) and annual household income (<20 000 yuan, 20 000-<80 000 yuan, ≥80 000 yuan) to compare the tobacco usage rate and conduct subgroup analyses for each subgroup. Multivariate logistic regression analysis was employed, incorporating general demographic characteristic information to explore the influencing factors of exclusive cigarette use and dual use of cigarettes and cigars, respectively.Results:The rate of exclusive cigarette use in our country was 24.3%, while the dual use rate of cigarettes and cigars was 0.9%. The exclusive cigarette use rate and the dual use rate of cigarettes and cigars among males were significantly higher than those among females (48.25% vs 2.48%, and 1.84% vs 0.06%) (both P<0.001). For males, the high-risk factors for exclusive cigarette use included living in urban areas ( OR: 1.37, 95% CI: 1.23-1.54), being Han ethnicity ( OR: 1.73, 95% CI: 1.51-1.98), and having an annual household income ≥20 000 yuan ( OR: 1.54, 95% CI: 1.38-1.82) while having a junior high school education or higher was a protective factor ( OR: 0.68, 95% CI: 0.52-0.90). Age≥35 years ( OR: 3.36, 95% CI: 2.62-4.32) and having a junior high school education or higher ( OR: 1.30, 95% CI: 1.02-1.67) were risk factors for dual use of cigarettes and cigars in males. Among females, living in urban areas ( OR: 1.53, 95% CI: 1.19-1.97) and being Han ethnicity ( OR: 5.96, 95% CI: 4.47-7.96) were risk factors for exclusive cigarette use, while having a university education or higher was a protective factor ( OR: 0.28, 95% CI: 0.18-0.42). However, for female dual use of cigarettes and cigars, no significant effects were observed for any demographic characteristics. Conclusions:The use rate of cigarettes alone in China is significantly higher than that of cigarette-cigar dual use, and the rates of cigarette use alone and cigarette-cigar dual use in men are significantly higher than those in women. Tobacco use is being affected by sociodemographic factors, among which place of residence, ethnicity and education level are the main influencing factors of cigarette use alone, and gender, age and education level are the main influencing factors of cigarette-cigar dual use.

Objective To explore the effects of ginsenoside Rg1 on blood-brain barrier, neuroinflammation and behavioral function of traumatic brain injury (TBI) mouse model.MethodsThe experiment was divided into two parts. In the first part, 27 SPF male BALB/c mice were randomly divided into blank group, sham operation group and TBI model group, with 9 mice in each group. TBI model group was made by controlled cortical impact (CCI) after craniotomy, while sham operation group was only performed craniotomy without any treatment, and the blank group was not treated at all. The effect of modeling was evaluated after operation. In the second part, 50 male BALB/c mice were randomly divided into sham operation group, three different drug dosage groups and solvent (DMSO) control group, with 8 mice in each group. The drug treatment groups were injected with ginsenoside Rg1 at the doses of 10, 20 and 40 mg/kg respectively 6 hours after TBI model had been successfully established, while the DMSO control group was given the same amount of 1% DMSO for one week, twice a day. Modified neurological severity scores (mNSS) were performed on the 1st, 3rd, 7th and 14th day after modeling, and the blood-brain barrier leakage was detected by Western blotting on the 3rd day after modeling. On the 14th and 16th day, the elevated cross maze test and water maze test were used to detect the neurobehavioral function. On the 28th day after anesthesia and perfusion, the brains were taken out, and the neuroinflammation such as activation of microglia and astrocytes was observed by immunofluorescence staining.ResultsThe expression level of MMP-9, a marker of blood-brain barrier, decreased in ginsenoside Rg1 treatment group (P<0.01). The number of microglia （Iba-1 positive) and astrocyte (GFAP positive) cells decreased significantly (P<0.05), which indicated that neuroinflammation was inhibited, and the best effect was achieved at the dosage of 20 mg/kg (P<0.01). The mNSS of mice in ginsenoside Rg1 treatment group were significantly lower than those in DMSO control group (P < 0.01), and the proportion of times they entered the open arm was significantly higher than that in DMSO control group (P < 0.05). The time ratio in the quadrant where the water maze experimental platform was located and the times of crossing the platform were significantly higher than those in control group (P < 0.05), and the dosage of 20 mg/kg had the best effect.ConclusionThe TBI mouse model was successfully constructed and applied to the study of ginsenoside Rg1 repair of mouse traumatic brain injury. Ginsenoside Rg1 can significantly improve blood-brain barrier, alleviate neuroinflammation and improve neurobehavioral function in TBI model mice, and the effect is the most significant at the dose of 20 mg/kg.

Objective:To explore the predictive value of peripheral blood CD34-positive cell count for the stem cell mobilization effect of plerixafor in patients with multiple myeloma (MM).Methods:The clinical data of 12 MM patients who used plerixafor for stem cell mobilization in the First Affiliated Hospital of Guangxi Medical University from December 2019 to February 2021 were retrospectively analyzed. The changes of peripheral blood CD34-positive cell count and the collection status of stem cell in all patients before and after the mobilization of plerixafor were analyzed.Results:Twelve patients were included in this study. These patients were in international staging system (ISS) stage Ⅱ-Ⅲ, and the induction therapy was mainly VRD regimen. The CD34-positive cell count was increased after the use of plerixafor in all patients no matter which mobilization strategies were used before plerixafor. The CD34-positive cell count was 3.63/μl (0.72-13.53/μl) and 32.11/μl (8.52-53.68/μl) before and after the use of plerixafor, and the difference was statistically significant ( Z = -0.40, P<0.001); the median increasing time was 11.50 times (1.61-23.71 times). The mobilization failure occurred in 1 patient. The CD34-positive cell count in his blood was less than 1/μl before the use of plerixafor; though increased 11.83 times after the use of plerixafor, the CD34-positive cell count was still less than 10/μl. Pearson analysis showed that among the patients with CD34-positive cell count less than 4/μl before the use of plerixafor, there was a positive correlation in peripheral blood CD34-positive cell count before and after the use of plerixafor ( r = 0.80, P = 0.032). Conclusions:The peripheral blood CD34-positive cell count has a certain predictive value for the stem cell mobilization effect of plerixafor in MM patients.

The health literacy refers to the ability of individuals to acquire and understand basic health information and services and use them to make the right decisions to maintain and promote their health. Health literacy data focusing on cancer prevention and control was limited in China. In order to understand the health literacy and awareness of cancer risk factors and the cancer screening, early diagnosis and treatment in Chinese urban residents and compare the effect of different stages of the cancer intervention, the Cancer Screening Program in Urban China (CanSPUC) program, supported by the National Key Public Health Program, conducted a survey on the health literacy of the cancer prevention and treatment among urban residents in 16 provinces nationwide from 2015 to 2017. Four subgroups were designed in this survey, including (1) general population who have never participated in any cancer screening programs at a community-level; (2) individuals who have previously attended the CanSPUC program for cancer risk assessment or screening intervention; (3) cancer patients who were receiving treatment in local hospitals; (4) a special group from employees of government and public institutions (non-health system), state-owned enterprises and private enterprises (to have better understand on the impact of socioeconomic factors). The self-designed questionnaire covered six parts, including basic information, consciousness of common risk factors to cancer, awareness of early detection, awareness of early diagnosis, awareness of early treatment, and the needs and approaches for knowledge of cancer prevention and treatment. A total of 32 257 individuals were included in the final analyses. This paper landscaped the overall design of the survey, including participants, domains of the instrument, quality control, basic characteristics of the included individuals. These descriptions are applicable to each individual report of the current special issue of "Health Literacy of Cancer Control in Urban China" and future reports, in which more detailed results are and will be reported. The findings of this survey could provide some useful implications for similar researches in the future.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection can cause acute respiratory distress syndrome, hypercoagulability, hypertension, and multiorgan dysfunction. Effective antivirals with safe clinical profile are urgently needed to improve the overall prognosis. In an analysis of a randomly collected cohort of 124 patients with COVID-19, we found that hypercoagulability as indicated by elevated concentrations of D-dimers was associated with disease severity. By virtual screening of a U.S. FDA approved drug library, we identified an anticoagulation agent dipyridamole (DIP) , which suppressed SARS-CoV-2 replication . In a proof-of-concept trial involving 31 patients with COVID-19, DIP supplementation was associated with significantly decreased concentrations of D-dimers ( < 0.05), increased lymphocyte and platelet recovery in the circulation, and markedly improved clinical outcomes in comparison to the control patients. In particular, all 8 of the DIP-treated severely ill patients showed remarkable improvement: 7 patients (87.5%) achieved clinical cure and were discharged from the hospitals while the remaining 1 patient (12.5%) was in clinical remission.

Objective:To explore the nutritional knowledge, attitude and practice (KAP) in patients during the waiting period for lung transplantation, analyze its influencing factors, and provide a reference for individualized nutritional intervention during the perioperative period of lung transplantation.Methods:Totally 240 patients during the waiting period for lung transplantation after lung transplantation evaluation in The Respiratory Center, Wuxi People's Hospital between January and December 2018 were selected using convenient sampling, and investigated with the self-made nutritional KAP questionnaire for patients during the waiting period for lung transplantation. And the influencing factors to their nutritional KAP were analyzed.Results:The nutritional knowledge of patients during the waiting period for lung transplantation was average, with a score of (18.71±4.53) ; the nutritional attitude was good, with a score of (38.00±6.49) ; the nutritional practice was average, with a score of (36.75±4.89) . Multiple linear regression analysis showed that the influencing factors of nutritional knowledge were economic status and whether it was complication with neurological diseases ( P<0.05) ; the influencing factors of nutritional attitude were occupation and serum protein ( P<0.05) ; the influencing factors of nutritional practice were age, educational level and whether it was complicated with urinary system disease ( P<0.05) . Conclusions:The nutritional KAP of patients during the waiting period for lung transplantation is affected by age, economic status, comorbidity, occupation and educational level and serum protein. In the perioperative nutritional management of lung transplantation patients, we should fully consider various factors, provide targeted and precision nutritional interventions, improve the nutritional practice and status of patients by improving their nutritional knowledge and attitude.

Objective: To investigate the pathogen spectrum distribution and drug resistance of febrile neutropenic patients with hematological diseases in Shanghai. Methods: A retrospective study was conducted on the clinical isolates from the febrile neutropenic patients hospitalized in the departments of hematology in 12 general hospitals in Shanghai from January 2012 to December 2014. The drug susceptibility test was carried out by Kirby-Bauer method. WHONET 5.6 software was used to analyze pathogenic bacteria and drug susceptibility data. Results: A total of 1 260 clinical isolates were collected from the febrile neutropenic patients. Gram-positive bacteria accounted for 33.3% and Gram-negative bacteria accounted for 66.7%. Klebsiella pneumoniae (12.5%) , Stenotrophomonas maltophilia (9.5%) , Escherichia coli (9.1%) , Pseudomonas aeruginosa (8.7%) , Acinetobacter baumannii (6.6%) , Staphylococcus aureus (5.6%) and Enterococcus faecium (5.0%) were ranked in the first 7 of all pathogens. In the respiratory tract secretions specimens, non-fermented strains accounted for 56.2%. Stenotrophomonas maltophilia accounted for 15.2%. Enterobacteriaceae and coagulase-negative Staphylococci accounted for 42.3% (104/246) and 32.6% (85/246) respectively in blood samples. Enterobacteriaceae and Enterococcus bacteria accounted for 39.4% (76/193) and 28.5% (55/193) respectively in pus specimens. The detection rates of methicillin resistant Staphylococcus aureus (MRSA) and methicillin resistant coagulase negative Staphylococci (MRCNS) were 54.3% and 82.5%, respectively. Staphylococcus bacterial strain was not found to be resistant to linezolid, vancomycin and teicoplanin. The detection rate of Enterococcus vancomycin-resistant strains was 8.9%. Enterococcus was not detected resistance to oxazolidinone strains. Enterobacteriaceae bacteria were highly sensitive to carbapenems. The resistance rate of Pseudomonas aeruginosa to imipenem and meropenem was 34.1% and 15.8%, respectively. Stenotrophomonas maltophilia was more sensitive to minocycline hydrochloride, levofloxacin and sulfamethoxazole. The resistance rate of Acinetobacter baumannii only to cefoperazone-sulbactam was less than 10.0%. The antibiotic resistance rate of Klebsiella pneumoniae, Stenotrophomonas maltophilia, Pseudomonas aeruginosa and Acinetobacter baumanii to most of common antibiotics was lower than that of the CHINET surveillance. Conclusions The pathogenic strain distribution in common infection sites of febrile neutropenic patients was characterized. Bacterial resistance surveillance was better than the CHINET nationwide large sample surveillance in China.

AIM: To investigate the expression and effects of sialyl Lewis X (SLeX) on the invasion and migration of human hepatocellular carcinoma HepG2 cells.METHODS: The expression of α1,3-fucosyltransferase VII (FUT7) in HepG2 cells and L-02 cells was detected by RT-qPCR and Western blot.The SLeX expression in HepG2 cells and L-02 cells was determined by Western blot and immunocytochemical staining.The invasion and migration abilities of the treated cells were evaluated by Transwell assay.RESULTS: The expression of FUT7 and SLeX in the HepG2 cells, but not in the L-02 cells, was observed.The invasion rates of the HepG2 cells treated with SLeX monoclonal antibody at 0.05, 0.5 and 5 mg/L were significantly decreased as compared with control group (P<0.05).The migration ability of the HepG2 cells treated with SLeX monoclonal antibody at 0.05, 0.5 and 5 mg/L was also significantly reduced as compared with control group (P<0.05).The invasion rate and migratory cell number were significantly different between any 2 groups in the HepG2 cells treated with SLeX monoclonal antibody at 0.05, 0.5 and 5 mg/L (P<0.05).CONCLUSION: HepG2 cells express SLeX.SLeX is closely related to the migration and invasion abilities of the HepG2 cells.