BACKGROUND:Traditional methods of urinary tract reconstruction are limited by donor scarcity,high complication rates,and suboptimal functional recovery.Tissue engineering strategies offer new directions in this field.Since the urinary tract is mainly composed of muscle tissue,the key is to find suitable seed cells and efficiently induce them to differentiate into smooth muscle cells.Comparative studies on the efficacy of different smooth muscle cell induction regimens are still lacking. OBJECTIVE:To isolate,culture,and identify human urine-derived stem cells,and to compare the effects of two different induction protocols. METHODS:Human urine-derived stem cells were isolated from urine samples of 11 healthy adult volunteers by multiple centrifugations.Surface markers were identified by flow cytometry.The multi-directional differentiation potential of human urine-derived stem cells was verified through osteogenic and adipogenic differentiation.Differentiation was induced by transforming growth factor-β1 or transforming growth factor-β1 combined with platelet derived growth factor for 14 days.Immunofluorescence staining and western blot assay were employed to compare the expression differences of smooth muscle-specific proteins(α-SMA and SM22). RESULTS AND CONCLUSION:(1)Urine-derived stem cells were successfully isolated from the eight urine samples of healthy people.These cells exhibit a"rice grain"-like morphology and possess a robust proliferative capacity.(2)Urine-derived stem cells exhibited high expression of mesenchymal stem cell surface markers(CD73,CD90,and CD44)and extremely low expression of hematopoietic stem cell surface markers(CD34 and CD45).These cells did not express CD19,CD105,and HLA-DR.(3)After osteogenic and adipogenic differentiation,the formation of calcium nodules and lipid droplets was observed,with positive staining results from Alizarin Red S and Oil Red O staining.(4)After 14 days of smooth muscle induction culture,immunofluorescence staining revealed that the smooth muscle differentiation rate of urine-derived stem cells treated with a combination of transforming growth factor-β1 and platelet derived growth factor was significantly higher compared to those treated with transforming growth factor-β1 alone(P<0.005).(5)After 14 days of smooth muscle induction culture,western blot assay further demonstrated that the expression levels of α-SMA and SM22 in the transforming growth factor-β1/platelet derived growth factor group were significantly elevated compared to those in the transforming growth factor-β1 only group(P<0.005).These findings confirm that urine-derived stem cells can be non-invasively isolated using multiple rounds of centrifugation.Compared with transforming growth factor-β1 alone,the combination of transforming growth factor-β1 and platelet derived growth factor can improve the efficiency of inducing urine-derived stem cells to differentiate into smooth muscle cells.

RBM46 is a germ cell-specific RNA-binding protein required for gametogenesis, but the targets and molecular functions of RBM46 remain unknown. Here, we demonstrate that RBM46 binds at specific motifs in the 3'UTRs of mRNAs encoding multiple meiotic cohesin subunits and show that RBM46 is required for normal synaptonemal complex formation during meiosis initiation. Using a recently reported, high-resolution technique known as LACE-seq and working with low-input cells, we profiled the targets of RBM46 at single-nucleotide resolution in leptotene and zygotene stage gametes. We found that RBM46 preferentially binds target mRNAs containing GCCUAU/GUUCGA motifs in their 3'UTRs regions. In Rbm46 knockout mice, the RBM46-target cohesin subunits displayed unaltered mRNA levels but had reduced translation, resulting in the failed assembly of axial elements, synapsis disruption, and meiotic arrest. Our study thus provides mechanistic insights into the molecular functions of RBM46 in gametogenesis and illustrates the power of LACE-seq for investigations of RNA-binding protein functions when working with low-abundance input materials.
Animals ; Mice ; 3' Untranslated Regions/genetics* ; Cell Cycle Proteins/metabolism* ; Gametogenesis/genetics* ; Meiosis/genetics* ; Nuclear Proteins/genetics* ; RNA-Binding Proteins/genetics*

With the rapid development of modern economy, road traffic has become increasingly busy, and the accompanying environmental pollution problem is becoming increasingly prominent. Air pollutants emitted from automobile exhaust, including particulate matters, NO_x, CO, and hydrocarbons (PAHs), can cause high risk of cardiovascular disease and premature death. This article summarizes the related epidemiological research progress on this topic from published literatures in recent years. We reviewed acute and chronic health damage to the cardiovascular system caused by traffic related air pollutants, including changes in heart rate variability and blood system indicators, potential association with coronary arteriosclerosis, coronary heart disease, and death of cardiovascular disease. The results show that traffic-related air pollutants can cause decrease in heart rate variability, increased blood pressure and changes in blood indicators, increase acute mortality from cardiovascular diseases. Long-term exposure to traffic-related air pollutants can induce increased risk of coronary atherosclerosis and coronary heart disease, and lead to increased mortality from cardiovascular diseases. In the future, more attention should be paid to traffic-related air pollution, and more researches are recommended to comprehensively evaluate the relationship between traffic-related air pollution and cardiovascular health damages, especially in early-stage. At the same time, active researches on the mechanism of cardiovascular toxicity of traffic-related air pollutants are needed, so as to promote the early prevention of cardiovascular diseases.

Riedel's thyroiditis (RT) is a rare form of thyroid disease,and the rate of misdiagnosis is high due to the low incidence of RT and the lack of understanding of the disease by clinicians.There is currently no standard and guidance for the diagnosis and treatment of RT.Improving the understanding of RT is of great significance for standardizing diagnosis and treatment and improving the life quality of patients.

In order to further promote the development of the TCM industry, promote and encourage social capital to organize TCM institutions, according to the national policy and system regulations on private TCM institutions, this article analyzed and studied policies factors affecting private Chinese medical institutions, concluded the advantaging policies for the development of private TCM institutions, teased out the unreasonable regulations to hinder and restrict the private TCM institutions, and finally proposed relevant suggestions and advice, with a purpose to promote the attention of government in the process of promoting private TCM institutions policy.

Objective To make clear the patients in minimally invasive surgery through explo-ring effects of pneumoperitoneum and pulmonary infection on the airway pressure of patients with dif-ferent body mass index (BMI)under general anesthesia.Methods A total of 849 cases of patients with trachea cannula in pneumoperitoneum surgery inr general anesthesia under different position were studied.To observe the changes of airway pressure and the ratio of pulmonary infection within one week of patients in general anesthesia.Propofol,Remifentanil and Atracrium were used in general an-esthesia.BIS and TOF were used to detect the degree of muscle relaxation.Results The airway pres-sure was increased obviously in patients of Head-down Tilt under same pneumoperitoneum pressure(P<0.05);the airway pressure was increased in patients with BMI>30 kg/m2 (P <0.05).There was no obvious increase in pulmonary infection rate in all patients.Conclusion Pneumoperitoneum could increase airway pressure and pulmonary infection of patients with low head position and BMI > 30 kg/m2 under same pneumoperitoneum pressure.Therefore,shorten the operation time and decreased pneumoperitoneum pressure could be used to prevent pulmonary infection.

The steroidal enzyme cytochrome P45017alpha catalyzes the conversion of progesterone and pregnenolone into androgens, androstenedione and dehydroepiandrosterone, respectively, the direct precursors of estrogens and testosterone. Dihydrotestosterone is the principal active androgen in the prostate, testosterone is also an active stimulant of the growth of prostatic cancer tissue. Inhibition of this enzyme as a mechanism for inhibiting androgen biosynthesis could be a worthwhile therapeutic strategy for the treatment of PCA. In this paper, four categories of steroidal inhibitors of cytochrome P45017alpha will be reviewed, a diverse range of steroidal inhibitors had been synthesized and shown to be potent inhibitors of P45017alpha.

OBJECTIVETo investigate the role of protein kinase C (PKC) in thrombin-induced monocyte chemoattractant protein-1(MCP-1) release by human lung fibroblasts (HLF-1).

METHODSCultured human lung fibroblasts HLF-1 were incubated with different concentrations of PKC inhibitors before by thrombin stimulation. MCP-l protein levels in the supernatants were assessed using ELISA, and MCP-1 mRNA levels in the cell lysate were measured by quantitative real-time PCR.

RESULTSThe broad spectrum PKC inhibitors bisindolylmaleimide I and RO-31-8220 obviously inhibited thrombin-induced MCP-l mRNA and protein expressions in HLF-1 cells, whereas Ca(2+)-dependent PKC inhibitor Go 6976 had no such effects.

CONCLUSIONCa(2+)-independent PKC mediates thrombin-induced MCP-1 release in cultured HLF-1 cells.

Cell Line ; Cells, Cultured ; Chemokine CCL2 ; metabolism ; Fibroblasts ; metabolism ; Humans ; Indoles ; pharmacology ; Lung ; cytology ; metabolism ; Protein Kinase C ; antagonists & inhibitors ; Thrombin ; pharmacology

Objective: To evaluate the predictive value of plasma amino-terminal pro-B-type natriuretic peptide (NT-proBNP) on short term prognosis in patients with acute coronary syndrome (ACS). Methods: Plasma NT-proBNP levels were measured in ACS patients within 24 h after admission with ELISA method. The 600 ACS patients were divided into two groups: event group （n=108）and no-event group （n=492）according to occurrence of cardiovascular events（including cardiac death, cardiac shock and heart failure）, The NT-proBNP levels were compared between two groups. Single factor and multiple factor Logistic regression analyses were used to evaluate if NT-proBNP was an independent predictor for short term prognosis. Results: The plasma NT-proBNP levels of event group were significantly higher than those of no-event group [1361.2 (965.3, 2088.6) pmol/L vs.605.7 (274.5, 1177.8) pmol/L, p<0.01]. Multiple factor Logistic regression analyses demonstrated that plasma NT-proBNP was an independent predictor for short term prognosis (OR=1.000, p<0.01) in ACS patients. Conclusion: Plasma NT-proBNP was an independent predictor for short term prognosis in ACS patients.

The in vitro antitumor activity of bakuchiol was exploited, compared with tamoxifen. The result of biological activities showed that bakuchiol could inhibit human breast cancer and the IC50 values were 2.89 x 10(-5) mol L(-1) and 8.29 x 10(-3) mol L(-1) against the cells line T-47D and MDA-MB-231 respectively. On the other hand, the key intermediate to synthesize bakuchiol was obtained by the method of Ireland-Claisen rearrangement. Comparing with traditional Claisen rearrangement, the reaction conditions are milder and the reaction reagents are safer.