Effects of coffee intake on airway hypersensitivity and immunomodulation:an in vivo murine study

BACKGROUND/OBJECTIVES@#Coffee is a complex chemical mixture, with caffeine being the most well-known bioactive substance. The immunomodulatory and anti-inflammatory properties of coffee and caffeine impact health in various aspects, including the respiratory system. The objective is to investigate the effects of coffee and caffeine on airway hyperresponsiveness and allergic reactions, as well as to analyze and compare associated cytokine profiles.MATERIALS/METHODS: BALB/c mice were intraperitoneally sensitized with ovalbumin (OVA) and given OVA inhalation to induce airway hypersensitivity. Two weeks after sensitization, they were intragastrically gavaged with coffee or caffeine, both containing 0.3125 mg caffeine, daily for 4 weeks. Control mice were fed with double-distilled water. Serum OVAspecific antibody levels were measured beforehand and 5 weeks after the first gavage. Airway hyperresponsiveness was detected by whole body plethysmography after gavage. Cytokine levels of bronchoalveolar lavage and cultured splenocytes were analyzed. @*RESULTS@#Coffee effectively suppressed T helper 2-mediated specific antibody response.Airway responsiveness was reduced in mice treated with either coffee or caffeine. Compared to the control, coffee significantly reduced OVA-specific immunoglobulin (Ig) G, IgG1 and IgE antibody responses (P < 0.05). Caffeine also attenuated specific IgG and IgG1 levels, though IgE level was unaffected. Coffee significantly reduced interleukin (IL)-4 and increased IL-10 concentration in spleen cells and bronchoalveolar lavage fluid (P < 0.05). @*CONCLUSIONS@#Coffee effectively attenuated airway hyperresponsiveness and systemic allergic responses induced by OVA food allergen in mice. As a complex composition of bioactive substances, coffee displayed enhanced immunomodulatory and anti-inflammatory effects than caffeine.

Fortify clinical advantages and promote innovative development: comparison of the Chinese Colorectal Cancer Surgery Database with foreign databases / 中华外科杂志

With the continuous development of evidence-based medicine, increasing attention has been paid to the construction of a large medical database to ensure a source of high quality real-world data. The Chinese Medical Association Colorectal Surgery Group created the Chinese Colorectal Cancer Surgery Database (CCCD), whose objective is to promote the development of colorectal surgery and improve patient prognosis with evidence-based medicine theory. Compared to major databases around the world, CCCD contains more comprehensive information on colorectal cancer surgical cases, recording the main epidemiological characteristics and detailed surgical information, but perioperative treatment data still need to be strengthened. It is necessary to continuously expand the coverage, enrich perioperative data and strengthen data, quality control. In the future, CCCD is expected to play a role in promoting homogenization of medical services, promoting smooth and effective graded diagnosis and treatment, giving full role to the characteristics of each center to achieve integrated development, and connecting real-world data and artificial intelligence.

Stable Expression of Coagulation Factors by RPS6 Promoter / 中国实验血液学杂志

OBJECTIVE@#To screen better promoters and provide more powerful tools for basic research and gene therapy of hemophilia.@*METHODS@#Bioinformatics methods were used to analyze the promoters expressing housekeeping genes with high abundance, so as to select potential candidate promoters. The GFP reporter gene vector was constructed, and the packaging efficiency of the novel promoter was investigated with EF1 α promoter as control, and the transcription and activities of the reporter gene were investigated too. The activity of the candidate promoter was investigated by loading F9 gene.@*RESULTS@#The most potential RPS6 promoter was obtained by screening. There was no difference in lentiviral packaging between EF1 α-LV and RPS6-LV, and their virus titer were consistent. In 293T cells, the transduction efficiency and mean fluorescence intensity of RPS6pro-LV and EF1 αpro-LV were proportional to the lentiviral dose. The transfection efficiency of both promoters in different types of cells was in the following order: 293T>HEL>MSC; Compared with EF1 αpro-LV, RPS6pro-LV could obtain a higher fluorescence intensity in MSC cells, and RPS6pro-LV was more stable in long-term cultured HEL cells infected with two lentiviruses respectively. The results of RT-qPCR, Western blot and FIX activity (FIX∶C) detection of K562 cell culture supernatant showed that FIX expression in the EF1 α-F9 and RPS6-F9 groups was higher than that in the unloaded control group, and there was no significant difference in FIX expression between the EF1 α-F9 and RPS6-F9 groups.@*CONCLUSION@#After screening and optimization, a promoter was obtained, which can be widely used for exogenous gene expression. The high stability and viability of the promoter were confirmed by long-term culture and active gene expression, which providing a powerful tool for basic research and clinical gene therapy of hemophilia.

Clinical efficacy of intra-articular injection with Triamcinolone acetonide in patients with juvenile idiopathic arthritis / 中华实用儿科临床杂志

Objective:To observe the clinical efficacy of intra-articular injection with Triamcinolone acetonide on the treatment of juvenile idiopathic arthritis (JIA).Methods:The clinical data of 26 children diagnosed with JIA undergoing the intra-articular injection of Triamcinolone acetonide for the joints with obvious swelling and pain at the Children′s Hospital Affiliated to Capital Institute of Pediatrics from October 2018 to December 2019 who were retrospectively analyzed.Erythrocyte sedimentation rate (ESR) and C-reactive protein(CRP) were tested before and after the application of Triamcinolone acetonide.Detailed clinical manifestations were recorded.The nonparametric Kruskal- Wallis test was used to compare the differences in clinical evaluation indicators and changes in laboratory tests at diffe-rent treatment times. Results:Among the 26 children, 8 were boys and 18 were girls.After the intra-articular injection of Triamcinolone acetonide, 9 cases (34.62%) achieved complete remission, 15 cases(57.69%) achieved partial remission, and 2 cases (7.69%) were not responsive to the intra-articular injection.The overall therapeutic efficacy was 92.31%.Compared with pre-treatment period, from 4 weeks after treatment, assessment of disease activity by the physicians and parents of the children was significantly improved after 4-week treatment, and the number of active joints, ESR and CRP and the Juvenile Arthritis Disease Activity Score with 27 joints (JADAS 27) gradually decreased, and the differences were statistically significant (all P<0.05). No adverse drug reactions were seen during the treatment and follow-up period. Conclusions:Intra-articular injection of Triamcinolone acetonide is effective in contro-lling joint symptoms of JIA with less adverse events.

Report of 8 cases with pediatric chronic non-bacterial osteomyelitis and literature review / 中华实用儿科临床杂志

Objective:To summarize the clinical features of chronic non-bacterial osteomyelitis (CNO) in children.Methods:Clinical data of 8 CNO patients admitted to the Department of Rheumatology and Immunology, Children′s Hospital Affiliated to Capital Institute of Pediatrics from March 2014 to December 2020 were retrospectively analyzed.The clinical characteristics of 8 children with CNO were summarized and compared with those reported abroad.Results:A total of 8 CNO patients were recruited, involving 3 males and 5 females with the mean age of onset (7.2±3.2)years, and the average diagnosis time 25.9 months, respectively.The common clinical symptoms included bone pain (7 cases, 87.5%), arthritis (4 cases, 50.0%), and fever (3 cases, 37.5%). The main manifestations on X-ray and CT scans were bone destruction and progressive osteosclerosis.Magnetic resonance imaging (MRI) showed bone marrow edema, periostitis, soft tissue swelling, and enhancement.All of them had more than one site of bone involvement.Seven patients(87.5%) had bilateral bone involvement, with the most common site of tibia (22.0%), followed by femur (17.1%) and mandible (9.8%). Bone biopsy was performed in 8 patients, and 4 cases showed osteonecrosis, 4 cases showed bone fibrosis and 2 cases showed osteomyelitis.The etiological examination of the bone was negative.Eight children received non-steroid anti-inflammatory drugs alone or in combination with glucocorticoids, disease-modifying antirheumatic drugs (DMARDs), bisphosphonates or tumor necrosis factor-α(TNF-α) antagonists.After treatment, the patients were followed up for 3 months to 2 years.Eight children improved.Their inflammatory indexes were normal, and had no disability, teratology or multiple organ damage.Conclusions:Pediatric CNO is more common in children of school age, with a long course of disease.The main manifestations are multi-site bone pain and arthritis.Imaging studies indicate multiple bone involvement, which is more common at lower extremities.Non-steroids anti-inflammatory drugs, glucocorticoids, DMARDs, bisphosphonates and TNF-α antagonists are effective to CNO.

Treatment of 11 cases of juvenile idiopathic arthritis by intra-articular injection of adalimumab / 中华儿科杂志

Objective: To evaluate the efficacy and safety of intra-articular injection of adalimumab (ADA) in the treatment of refractory oligoarticular juvenile idiopathic arthritis (JIA). Methods: This was a retrospective study. Clinical data on age, gender, and symptoms of joint swelling and pain were collected from 11 children with refractory oligoarticular JIA involving only knee joints admitted to Department of Rheumatism and Immunology of Children's Hospital, Capital Institute of Pediatrics from November 2019 to October 2020. The physician and parent-child evaluation of disease activity, the number of active joints, and the level of erythrocyte sedimentation rate (ESR) at different treatment time points were analyzed at every 4-week observation point after drug administration, and the non-parametric Kruskal-Wallis test was used to compare the differences in clinical evaluation indicators and changes in laboratory tests at different treatment times. The follow-up period was 6 months. Results: Among the 11 children, 5 were boys and 6 were girls. The age was 3.0 (2.8) years. All 11 children had symptoms of joint swelling and pain as well as limitation of movement. After 3 intra-articular injections of ADA, the joint symptoms of 11 children were better than before treatment; the joint symptoms of 7 children disappeared completely, and no recurrence occurred during the 6-month follow-up period. At different treatment times, physician and parent-child evaluation of disease activity, a gradual decrease in the number of active joints in the children, ESR, and juvenile arthritis disease activity score with 27 joints were all statistically significant (χ2=53.99, 59.37, 32.87, 40.07, 54.00, all P<0.001).No significant adverse drug reactions were observed in any of the 11 children during treatment and follow-up. Conclusion: Intra-articular injection of ADA in the treatment of refractory oligoarticular JIA has a significant effect in controlling joint symptoms and is relatively safe.

Pay attention to the risk of infection and tumor progression during application of TNF-α inhibitors in uveitis / 中华实验眼科杂志

Adalimumab, one of the tumor necrosis factor-α (TNF-α) inhibitors, has been approved as a therapeutic drug for non-infectious intermediate, posterior and pan-uveitis by FDA.Due to the good efficacy, TNF-α inhibitors are being applied widely in ophthalmology.However, some researches based on the application of TNF-α inhibitor in treating inflammatory bowel diseases and rheumatoid arthritis, etc.have showed that it can bring out some adverse effects such as infection and tumor occurrence and/or progression.The main safety problems in the application of TNF-α inhibitors lie in its increased risk of serious infection, postoperative infection, the occurrence or progression of tuberculosis and hepatitis, as well as the tumorigenesis and tumor progression.With the wider application of adalimumab in refractory uveitis, ophthalmologists should not only focus on its therapeutic effect, but also get to know the adverse effects of the drug, so as to standardize the examination, prevention and control of primary diseases before and after the administration of adalimumab and observe closely clinical manifestations of patients with administration of adalimumab, select the treating method and timing reasonably to reduce and avoid the adverse drug reactions, and improve the therapeutic outcome.

Navitoclax Combined with Daunorubicin Promotes Apoptosis of Erythroleukemia Cell Lines K562, HEL and TF-1 / 中国实验血液学杂志

OBJECTIVE@#To study the effect of apoptotic drug Navitoclax (NTX) combined with chemotherapy drug Daunorubicin (DNR) on apoptosis of erythroleukemia cells.@*METHODS@#K562, HEL and TF-1 cells in logarithmic growth phase were treated with NTX, DNR and combination of the two drugs. CCK-8 test, Annexin V-DAPI double-staining flow cytometry, real-time RT-PCR were used to detect cell growth, cell apoptosis and expression of BAX, BAK, BCL-2, BCL-xl and BIM respectively. The effects of NTX, DNR and combination of the two drugs on apoptosis of K562, HEL and TF-1 cells were compared and analyzed.@*RESULTS@#NTX combined with DNR could significantly inhibit the growth of K562, HEL and TF-1 cells; Apoptosis detection results showed that the apoptotic rate of K562, HEL and TF-1 cells in combination group was significantly higher than that in NTX and DNR single group; the expression level of apoptosis-related genes BAK and BAX in K562 cells in combination group was significantly higher than that in two single drug groups, and the expression level of anti-apoptotic protein genes BCL-2 and BCL-xl was significantly lower than that in two single drug groups (P＜0.05); the expression level of BAK in HEL cells treated with combined drugs for 24 hours was higher than that in DNR group (P ＜ 0.05); the expression level of BCL-2 in TF-1 cells treated with combined drugs for 24 hours was lower than that in two single drugs groups while the expression level of BAK in 48 hours was the highest in combined drugs group, and the expression level of BCL-2 and BCL-xl in combined drugs group was lower than that in NTX group (P＜0.05).@*CONCLUSION@#NTX combined with DNR can significantly promote the apoptosis of erythroleukemia cell lines K562, HEL and TF-1, and induce the expression of apoptosis-related genes. This study provides a new scheme for the clinical treatment of erythroleukemia.

Overexpression of Interferon Regulatory Factor IRF1 Remodels Homeostasis of K562 Cells / 中国实验血液学杂志

OBJECTIVE@#To investigate the effects of IRF1 on the homeostasis and differentiation of K562 cells.@*METHODS@#Three different vectors were constructed to screen the best strategy for IRF1 overexpression. The effect of IRF1 on cell proliferation and apoptosis was explored by cell count and apoptotic surface marker detection. Likely, the effect of IRF1 on cell differentiation was analyzed by differentiational surface marker assay. Finally, the regulation mechanism at mRNA level was analyzed by RT-qPCR.@*RESULTS@#The single open reading frame constructed by P2A-T2A element showed the highest expression intensity, and it was the best approach to realize IRF1 enhancement. Cell counts showed that IRF1 had no significant effect on the proliferation of K562. Annexin V and 7-AAD labeling exhibited strong anti-apoptotic function of IRF1 against AraC induction. Flow cytometry revealed that IRF1 overexpression could also further increase the proportion of CD71CD235a cells. RT-qPCR confirmed its upregulation effect on CD235a and TAL1.@*CONCLUSION@#IRF1 enhancement alters the homeostasis characteristics of K562 cells, increases the anti-apoptotic ability and raises the potential to downstream differentiation, suggesting that IRF1 may play an important regulatory role in the hematopoietic development, including erythropoiesis.

Gene mutation spectrum and clinical characteristics analysis of 178 patients with essential thrombocytosis / 中华血液学杂志

Objective@#To analyze the gene mutation spectrum, clinical features, and the factors of disease progression and prognosis in patients with essential thrombocytosis (ET) .@*Methods@#A retrospective analysis was conducted on 178 newly diagnosed ET patients admitted from February 1st, 2009 to November 1st, 2018.@*Results@#Of the 178 patients, 89 were male and 89 female, and the median diagnosis age was 49.5 (3-86) years old. JAK2V617F, CALR and MPL mutations frequencies were 16.45% (1.67%-43.90%) , 40.00% (10.00%-49.15%) and 25.10% (25.00%-40.00%) , respectively. Compared with patients with CALR mutations, patients with JAK2V617F mutation had higher diagnosis age (P=0.035) , higher white blood cell count (P=0.040) , higher hemoglobin concentration (P=0.001) , and lower platelet count (P=0.002) , respectively. Of them, 47 patients (27.01%) developed thrombotic events before diagnosis, and 3 ones (1.72%) experienced thrombotic events after diagnosis. Multivariate analysis revealed age >60 years (P=0.013, OR=4.595, 95%CI 1.382-15.282) and cardiovascular risk factors (CVF) (P<0.001, OR=8.873, 95%CI 2.921-26.955) as risk factors for thrombotic events, CALR mutation (P=0.032, OR=0.126, 95%CI 0.019-0.838) as a protective factor for thrombotic events. Age >60 years (P=0.042, OR=4.045, 95%CI 1.053-15.534) was found to be a risk factor for the overall survival (OS) of ET patients. OS of age ≤60 years and age>60 years were calculated by Kaplan-Meier analysis to be (115.231±1.899) months and (83.291±4.991) months (χ2=6.406, P=0.011) , respectively.@*Conclusion@#Age>60 years and CVF were risk factors for thrombotic event. CALR mutation was a protective factor for thrombotic event. Age >60 years was a risk factor for OS in ET patients.

Pyroptosis induced by different Enteroviruses infection in SH-SY5Y cell / 中华实验和临床病毒学杂志

Objective@#To investigate the pyroptosis induced by different enteroviruses in human neuroblastoma cells SH-SY5Y and the differences among them.@*Methods@#SH-SY5Y cells were infected with nine strains of enterovirus respectively, including enterovirus A71 (EV-A71), Coxsackievirus A (CA), Coxsackievirus B (CB), Echovirus (Echo). The cellular morphology of infected and control groups were observed and activity of Caspase-1 of infected and control groups were detected by flow cytometry at 48 h post infection.@*Results@#The activity of Caspase-1 induced by EV-A71 was higher than control (P<0.001), and the activity of Caspase-1 induced by EV-A71 isolated from severe case was significantly higher than that induced by EV-A71 isolated from common case (P<0.001). The activity of Caspase-1 induced by CA was at a lower level. The activity of Caspase-1 induced by CB and Echo were both significantly higher than that induced by EV-A71 and control (P<0.001). Cytopathic effects (CPE) were found to be related with the activity of Caspase-1.@*Conclusions@#EV-A71, CB and Echo all could induce pyroptosis mediated by Caspase-1 in SH-SY5Y cells, but the ability of CA to induce pyroptosis was at a lower level, which may provide evidences for further study on mechanism of neuropathy caused by enterovirus.

Progress in minimally invasive surgical treatment of rectal cancer from the development of TaTME / 中国实用外科杂志

With the developments in scientific technology and deeper understanding of the disease itself,the surgical treatment for patients with colorectal cancer has undergone some transitions from local resection to total mesorectum excision(TME),from the open operation to laparoscopic surgery,and from laparoscopic surgery to robotic surgery,then it has entered the era of minimally invasive surgery.Under the background of the era,transanal total mesorectal excision(TaTME)has arised at this historic moment.As Dr.Heald said,who created the technique of TME,Ta TME assembles all the characteristics of surgery techniques for rectal cancer.Each stage of its development is highly representative,and it has become a microcosm of the progress in minimally invasive techniques for rectal surgery.

Clinical and molecular characteristics of GATA2 related pediatric primary myelodysplastic syndrome / 中华血液学杂志

Objective: To clarify the prevalence, clinical features and molecular characteristics of germline GATA2 mutations in pediatric primary myelodysplastic syndromes (MDS) . Methods: Next-generation sequencing technology was used to detect mutations in GATA2 and other myeloid malignancy genes in 129 children with primary MDS from Jan. 2007 to Jan. 2018. The relationship between genotypes and phenotypes was analyzed. Results: Germline GATA2 mutations accounted for 8.5% (11/129) of all primary MDS cases, and 14.0% (11/50) of MDS with excess blasts (MDS-EB) and acute myeloid leukaemia with myelodysplasia-related changes (AML-MRC) . Compared with GATA2 wild-type patients, GATA2 mutated patients were older at diagnosis[8 (1-16) years old vs 6 years old (range: 1 month old-18 years old) , P=0.035]and higher risk of monosomy 7 (72.7%vs 5.2%, P<0.001) and classified into MDS-EB and AML-MRC compared with refractory cytopenia of childhood (RCC) (63.6%vs 36.4%, P=0.111) . The multivariate analysis showed SETBP1 mutation (P=0.041, OR=9.003, 95%CI 1.098-73.787) and isolated monosomy 7 (P=0.002, OR=24.835, 95%CI 3.305-186.620) were significantly associated with germline mutated GATA2. Overall survival (OS) and outcomes of hematopoietic stem cell transplantation (HSCT) were not influenced by GATA2 mutational status. Conclusions: Our data identify germline GATA2 mutations have a high prevalence in older pediatric patients with monosomy 7, and high risk of progression into advanced MDS subtypes. GATA2 mutation status does not affect OS in pediatric primary MDS.

Clinical features and gene mutation spectrum in children with sideroblastic anemia / 中国当代儿科杂志

OBJECTIVE@#To study the clinical features and gene mutation spectrum of children with sideroblastic anemia (SA) and the clinical value of targeted next-generation sequencing in the molecular diagnosis of children with SA.@*METHODS@#Clinical data were collected from 36 children with SA. Targeted next-generation sequencing was used to detect mutations in SA-related pathogenic genes and genes associated with heme synthesis and mitochondrial iron metabolism. The association between genotype and clinical phenotype was analyzed.@*RESULTS@#Of the 36 patients, 32 had congenital sideroblastic anemia (CSA) and 4 had myelodysplastic syndrome with ring sideroblasts (MDS-RS). Mutations in CSA-related genes were detected in 19 children (19/36, 53%), among whom 9 (47%) had ALAS2 mutation, 4 (21%) had SLC25A38 mutation, and 6 (32%) had mitochondrial fragment deletion. No pathogenic gene mutation was detected in 4 children with MDS-RS. Among the 19 mutations, 89% (17/19) were known mutations and 11% (2/19) were novel mutations. The novel mutation of the ALAS2 gene c.1153A>T(p.I385F) was rated as "possibly pathogenic" and the novel mutation of the SLC25A38 gene c.175C>T(p.Q59X) was rated as "pathogenic".@*CONCLUSIONS@#ALAS2 and SLC25A38 gene mutations are commonly seen in children with CSA, but mitochondrial gene fragment deletion also accounts for a relatively high proportion. For children with hypoplastic anemia occurring in infancy, mitochondrial disease should be considered.

Research on Total Budget Management Controlling of Hospitals Based on Finance and Business Integration / 中国卫生经济

Objective:To improve the level of hospital total budget management.Methods:It carried out the integration of finance and business information,put forward the budget control from financial process to business process,to achieve the effect of business treatment,accounting treatment and budget control synchronization.It enriched budgetary indicators,put integrating business indicators into the budgetary index system.Results:The total budget management based on finance and business integration could guarantee the authoritativeness of hospital's budget control,improve the breadth and depth of budget management,and reduce the intensity of accounting work.Conclusion:The total budget management based on finance and business integration could effectively improve the level of hospital economic management.

Feasibility and Safety of Enhanced Recovery after Surgery for Elderly Patients with Colorectal Cancer / 中国医学科学院学报

Objective To evaluate the feasibility and safety of enhanced recovery after surgery (ERAS) in elderly patients with colorectal cancer (CRC).Methods A retrospective analysis was conducted on 230 CRC patients undergoing ERAS from January 2017 to January 2018. These subjects included 120 young patients (<70 years) and 110 elderly patients (≥70 years).The rates of ERAS compliance,anastomotic leakage,re-operation,and re-hospitalization,the mortality,and the average hospital stay were compared between these two groups.Results The elderly group had significantly higher incidences including diabetes (20.9% vs. 10.8%,P=0.045),heart disease (24.5% vs. 11.7%,P=0.039),respiratory diseases (20.0% vs. 10.0%,P=0.041),and hypertension (26.4% vs. 15.0%,P=0.035) than the young group. However,these two groups were not statistically significant in terms of ERAS compliance rate (79% in the young group vs. 74% in the elderly group,P=0.574),incidence of anastomotic leakage (2.5% vs. 1.8%,P=1.000),re-operation rate (1.7% vs. 2.7%,P=0.672),re-hospitalization rate (2.5% vs. 4.5%,P=0.484),mortality rate within 30 days after operation (1.7% vs. 2.7%,P=0.672). The average hospital stay was 5 days in the young group and 7 days in the elderly group (P=0.000).Conclusions Although the elderly patients tend to have poor general status,their ERAS compliance rate and main treatment indicators including incidence of anastomotic leakage,re-operation rate,re-hospitalization rate,and mortality rate within 30 days after surgery are not different from young patients. Thus,the ERAS program is safe and feasible for elderly CRC patients.

Genome-wide transcriptional profiling of NB4 leukemic cells affected by umbilical cord-derived mesenchymal stem cells / 中国组织工程研究

BACKGROUND: Mesenchymal stem cells (MSCs) are an important component of the in vivo microenvironment and act on multiple biological behaviors of tumor cells. The potential clinical value of MSCs has become an issue of concern in recent years.OBJECTIVE: To investigate the gene expression profiles of acute promyelocytic leukemia (APL) cell line NB4 treated with umbilical cord-derived MSCs (UC-MSCs) using cDNA microarray.METHODS: In vitro co-culture system was constructed, and then cellular proliferation, apoptosis and differentiation status of NB4 cells treated with UC-MSCs were evaluated. Two cDNA probes were prepared through reverse transcription from mRNA of NB4 cells treated with or without UC-MSCs. The probes were labeled with fluorescence dyes individually, hybridized with cDNA microarray, and their fluorescent intensities were scanned. The genes were screened through the analysis of the difference in two gene expression profiles.RESULTS AND CONCLUSION: UC-MSCs promoted the proliferation and differentiation, while reduced the apoptosis of NB4 cells. The analysis of gene expression profiles indicated that after co-culture with UC-MSCs, 530 genes were up-regulated and 53 genes were down-regulated. Accordingly, specific gene function and pathway signaling related were also regulated to some extent. Overall, UC-MSCs influence can major biological behaviors of NB4 cells by changing expression of a large amount of genes, gene-related function and multiple intracellular signaling pathways.

Prophylactic herbal therapy prevents experimental ascending urinary tract infection in mice / 中国结合医学杂志

<p><b>OBJECTIVE</b>To study the preventive effect of herbal formulation on experimental murine urinary tract infection (UTI) induced by Dr Escherichia coli 11128.</p><p><b>METHODS</b>E. coli 11128 carrying Dr fimbriae was isolated from patients with chronic pyelonephritis. The minimal inhibitory concentration (MIC) value of herbal solution for E. coli 11128 was determined for further studies. Forty C3H/HeJ mice were divided into the herb-treated group (n=20, given Chinese herbs by gavage at an average dose of 20 g/kg body weight daily 3 days before inoculation), and control group (n=20, given the same amount of distilled water by gavage). Three and 6 days after infection, bacteria were counted in the urine and the kidneys of the mice. Kidney histopathologic changes were evaluated. Neutrophils infiltration and accumulation were detected.</p><p><b>RESULTS</b>The MIC value of herbal solution was 0.1 g/mL for the E. coli 11128. In herb-treated mice, there was a significant reduction in bacterial counts in urine and colonization densities of kidneys. Microscopic studies revealed signs of inflammation in kidneys. In herb-treated mice, herbal administration resulted in significantly reduced neutrophilic infiltrates (P<0.05). The semi-quantitative scores for renal lesions were significantly lower (P<0.05).</p><p><b>CONCLUSION</b>Prophylactic administration of herbal formulation potentiated the effect in partially preventing experimental murine ascending UTI.</p>

Human Umbilical Cord-derived Mesenchymal Stem Cells Secrete Interleukin-6 to Influence Differentiation of Leukemic Cells / 中国医学科学院学报

<p><b>OBJECTIVE</b>To investigate the effect of human umbilical cord-derived mesenchymal stem cells (UC-MSC) on the differentiation of leukemic cells.</p><p><b>METHODS</b>The co-culture system of UC-MSC with acute promyelocytic leukemic cell line NB4 cells was constructed in vitro,and the differentiation status of the leukemic cells was assessed by cell morphology,nitroblue tetrazolium reduction test,and cell surface differentiation marker CD11b.</p><p><b>RESULTS</b>UC-MSC induced the granulocytic differentiation of NB4 cells. When UC-MSC and a small dose of all-trans retinoic acid were applied together,the differentiation-inducing effect was enhanced in an additive manner. Interleukin (IL)-6Ra neutralization attenuated differentiation and exogenous IL-6-induced differentiation of leukemic cells.</p><p><b>CONCLUSION</b>UC-MSC can promotd granulocytic differentiation of acute promyelocytic leukemia cells by way of IL-6 and presented additive effect when combined with a small dose of all-trans retinoic acid.</p>

Influence of MicroRNA-382 on Biological Properties of Human Umbilical Cord-Derived Mesenchymal Stem Cells / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the effect of microRNA-382 (miR-382) on the biological properties of human umbilical cord-derived mesenchymal stem cells (hUC-MSC).</p><p><b>METHODS</b>The mimics and inhibitor of miR-382 were transfected into hUC-MSC with lipo2000. Inverted microscopy was used to observe the morphology change of hUC-MSC. The proliferation of hUC-MSC was detected by CCK-8. Oil red O and alizarin red staining were applied to assess the adipogenic and osteogenic differentiation of hUC-MSC. Cetylpyridinium chloride was used to the quantitative analysis of osteogenic differentiation. The expression of Runx2 and some cytokines were detected by RT-PCR.</p><p><b>RESULTS</b>miR-382 did not influence the morphology, proliferation and adipogenic differentiation of hUC-MSC miR-382 inhibited the expression of Runx2, thus could inhibit the osteogenesis of hUC-MSC, being confirmed by alizarin red stain; miR-382 could influence the expression of key cytokines secreted from hUC-MSC, such as IL-6, IDO1, G-CSF, M-CSF, GM-CSF.</p><p><b>CONCLUSION</b>miR-382 decreases the expression of Runx2 and inhibites the osteogenesis of hUC-MSC. In addition, it also affects the expression of some key cytokines secreted from hUC-MSC.</p>