Association of Serum Glucocorticoids with Various Blood Pressure Indices in Patients with Dysglycemia and Hypertension: the Henan Rural Cohort Study / 生物医学与环境科学（英文）

Objective@#To our knowledge, no definitive conclusion has been reached regarding the relationship between glucocorticoids and hypertension. Here, we aimed to explore the characteristics of glucocorticoids in participants with dysglycemia and hypertension, and to analyze their association with blood pressure indicators.@*Methods@#The participants of this study were from the Henan Rural Cohort study. A total of 1,688 patients 18-79 years of age were included in the matched case control study after application of the inclusion and exclusion criteria. Statistical methods were used to analyze the association between glucocorticoids and various indices of blood pressure, through approaches such as logistic regression analysis, trend tests, linear regression, and restricted cubic regression.@*Results@#The study population consisted of 552 patients with dysglycemia and hypertension (32.7%). The patients with co-morbidities had higher levels of serum cortisol ( @*Conclusions@#Serum deoxycortisol was positively correlated with systolic blood pressure, pulse pressure, mean arterial pressure, mean blood pressure, and mean proportional arterial pressure. Glucocorticoids (deoxycortisol and cortisol) increase the risk of hypertension in people with dysglycemia, particularly in those with T2DM.

Small Solitary Ground-Glass Nodule on CT as an InitialManifestation of Coronavirus Disease 2019 (COVID-19)Pneumonia

The 2019 novel coronavirus (2019-nCoV) outbreak in Wuhan, Hubei Province, China in 2019 led to large numbers of peoplebeing infected and developing atypical pneumonia (coronavirus disease 2019, COVID-19). Typical imaging manifestations ofpatients infected with 2019-nCoV has been reported, but we encountered an atypical radiological manifestation on baselinecomputed tomography (CT) images in three patients from Wuhan, China infected with the 2019-nCoV. Surprisingly, the onlysimilar CT finding was a solitary sub-centimeter ground-glass nodule adjacent to bronchovascular bundles, which could beeasily overlooked. In addition, the follow-up images in these patients showed how COVID-19 pneumonia evolved from thesesmall nodules. The radiologic manifestation of the three cases will expand contemporary understanding of COVID-19.

Developmental relationship between mesenchymal stem/progenitor cells and hematopoietic cells during human embryogenesis / 中华微生物学和免疫学杂志

Objective@#To analyze the developmental relationship between mesenchymal stem/progenitor cells (MSPCs) and hematopoietic cells during human embryogenesis.@*Methods@#Aborted embryos at different developmental stages were used in this study after medical abortion. Embryonic blood tissues were isolated and digested into single cells. These single cells were plated in semisolid medium in favor of the differentiation of colony-forming cell with high proliferative potential (HPP-CFC) and incubated for 10 to 14 d. Individual colonies with diameter more than 0.5 mm were picked and replated in liquid medium. Fibroblastic adherent cells appeared in the replated colonies were cultured for cell proliferation and cytokins expressed on cell surface were identified to analyze whether they had the characteristics of MSPCs.@*Results@#This study summarized the dynamic development of HPP-CFCs and other hematopoietic progenitor cells in different tissues including aorta-gonad-mesonephros (AGM) region, yolk sac and embryonic liver. From the 28-somite stage, a proportion of HPP-CFCs in AGM region could give rise to adherent fibroblastic cells in addition to hematopoietic cells. The adherent cells harbored the differentiation potential of MSPCs and could inhibit the proliferation of T cells in lymphocyte transformation test.@*Conclusions@#This study suggests some prehematopoietic precursors in AGM region can give rise to both hematopoietic progenitors and MSPCs during human embryogenesis.

Developmental relationship between mesenchymal stem/progenitor cells and hematopoietic cells dur-ing human embryogenesis / 中华微生物学和免疫学杂志

Objective To analyze the developmental relationship between mesenchymal stem/pro-genitor cells (MSPCs) and hematopoietic cells during human embryogenesis. Methods Aborted embryos at different developmental stages were used in this study after medical abortion. Embryonic blood tissues were isolated and digested into single cells. These single cells were plated in semisolid medium in favor of the dif-ferentiation of colony-forming cell with high proliferative potential ( HPP-CFC) and incubated for 10 to 14 d. Individual colonies with diameter more than 0. 5 mm were picked and replated in liquid medium. Fibroblastic adherent cells appeared in the replated colonies were cultured for cell proliferation and cytokins expressed on cell surface were identified to analyze whether they had the characteristics of MSPCs. Results This study summarized the dynamic development of HPP-CFCs and other hematopoietic progenitor cells in different tis-sues including aorta-gonad-mesonephros ( AGM) region, yolk sac and embryonic liver. From the 28-somite stage, a proportion of HPP-CFCs in AGM region could give rise to adherent fibroblastic cells in addition to hematopoietic cells. The adherent cells harbored the differentiation potential of MSPCs and could inhibit the proliferation of T cells in lymphocyte transformation test. Conclusions This study suggests some prehemato-poietic precursors in AGM region can give rise to both hematopoietic progenitors and MSPCs during human embryogenesis.

Effects of Shengmai Jianghuang San on intestinal flora in nude mice with radio resistant cells of nasopharyngeal carcinoma / 中国中药杂志

Modern pharmacological studies have shown that Shengmai San has the effects of enhancing immunity and improving blood circulation, and Curcumae Longae Rhizoma(Jianghuang) has anti-inflammatory, anti-cancer, anti-oxidation and other functions. Shengmai San combined with Jianghuang is a new research direction in the study of anti-tumor of traditional Chinese medicines. The main treatment for nasopharyngeal carcinoma is radiation therapy, but radiation therapy can cause a variety of side effects, and it also changes the composition of the intestinal flora. In this study, the 16 s rDNA sequencing platform was used to perform macro-sequence sequencing of the intestinal flora samples of nude mice bearing the veins of Shengmai Jianghuang San, and then the results of intestinal flora data were analyzed to investigate the effect of Shengmai Jianghuang San on tumors. The results showed that Shengmai Jianghuang San combined with irradiation could enhance the therapeutic effect of tumor treatment. Radiation therapy would reduce the total number and diversity of intestinal flora in nude mice, and also change the structure of the flora. Shengmai Jianghuang San could protect the diversity of colonies, and also partially restore the colony imbalance caused by irradiation. This study provides a research idea for Shengmai Jianghuang San as a sensitizing adjuvant for radiotherapy of nasopharyngeal carcinoma.

Discordant lymphoma: report of one case and review of literature / 白血病·淋巴瘤

Objective@#To investigate the clinical characteristics, diagnosis, treatment and prognosis of discordant lymphoma.@*Methods@#The clinical data of one patient with discordant lymphoma at the PLA Strategic Support Force Characteristic Medical Center were retrospectively analyzed, and the related literatures were reviewed.@*Results@#The patient was treated for thrombocytopenia and the examination showed splenomegaly. After hormone treatment, the platelet rebounded and thrombocytopenia occurred during hormone reduction. Splenectomy was performed. Postoperative pathological diagnosis of splenic marginal lymphoma was made and observed. Axillary lymph node enlargement occurred nine months later. Pathological diagnosis of diffuse large B-cell lymphoma was made by using lymph node biopsy, and the disease condition was alleviated after immunotherapy combined with chemotherapy.@*Conclusions@#Discordant lymphoma is rare and shows no special clinical manifestations. Its diagnosis should rely on pathological examination. Immunotherapy combined with chemotherapy may be more effective.

Clinicopathologic and Prognostic Significance of the Zinc Finger of the Cerebellum Family in Invasive Breast Cancer / 한국유방암학회지

PURPOSE: Five members of the zinc finger of the cerebellum (ZIC) family—ZIC1, ZIC2, ZIC3, ZIC4, and ZIC5—have been shown to be involved in various carcinomas. Here, we aimed to explore the clinicopathologic and prognostic roles of ZIC family members in invasive breast cancer patients using immunohistochemical analysis, western blotting analysis, and real-time quantitative polymerase chain reaction (RT-qPCR). METHODS: A total of 241 female invasive breast cancer patients who underwent radical mastectomy between 2009 and 2011 were enrolled. ZIC proteins in 241 pairs of breast tumors and corresponding normal tissues were investigated using immunohistochemistry and the clinicopathologic roles of proteins were analyzed using Pearson's chi-square test. Kaplan-Meier curves and Cox regression analysis were also used to analyze the prognostic value of the ZIC proteins. In addition, 12 pairs of fresh-frozen breast tumors and matched normal tissues were used in the western blotting analysis and RT-qPCR. RESULTS: Only ZIC1 expression in normal tissues was obviously higher than that in tumors (p < 0.001). On multivariate analysis, ZIC1 expression (in overall survival analysis: hazard ratio [HR], 0.405, 95% confidence interval [CI], 0.233–0.702, p=0.001; in disease-free survival analysis: HR, 0.395, 95% CI, 0.234–0.669, p=0.001) was identified as a prognostic indicator of invasive breast cancer. CONCLUSION: ZIC1, but not the other proteins, was obviously decreased in breast tumors and associated with clinicopathologic factors. Thus, ZIC1 might be a novel indicator to predict the overall and disease-free survival of invasive breast cancer patients.

Regulatory mechanisms of gut microbiota on intestinal CYP3A and P-glycoprotein in rats with dextran sulfate sodium-induced colitis / 药学学报

As important constituents of the first-line of host defense barrier, intestinal cytochrome P450 3A (CYP3A) and P-glycoprotein (P-gp) play important roles in disease pathogenesis as well as drug absorption and exposure. Clinical reports and experimental data revealed diminished intestinal CYP3A and P-gp expression accompanying with gut dysbiosis in inflammatory bowel disease. Yet whether gut dysbiosis is associated with the down-regulation of CYP3A and P-gp and the underlying mechanisms are unclear. In this study, daily administration of fresh feces from normal rats and rats with ulcerative colitis (UC) induced by dextran sulfate sodium to normal rats resulted in alterations of gut bacterial compositions. Intestinal CYP3A2 and P-gp were significantly down-regulated in rats receiving UC feces. Outer-membrane vesicles (OMVs) are nano-scale special buds of the outer membrane which are produced by Gram-negative bacteria and mediate diverse functions including interactions within bacterial communities and communications with host. Expressions of CYP3A4 and P-gp mRNA were diminished in human epithelial colorectal adenocarcinoma cells (Caco-2) treated by OMVs from all different groups with OMVs from UC rats or rats receiving UC feces showing more significant effects.Moreover, the OMVs fractions within 30 000-50 000 Daltons from both normal and UC rats elicited more effects than fractions of other molecular weights. Treatment of Caco-2 cells with toll like receptor 4 (TLR4) inhibitor resatorvid (TAK-242) or TLR4 silence RNA (siRNA) blocked CYP3A4 and P-gp down-regulation induced by bacterial OMVs. Taken together, we proved in this study that gut microbiota can down-regulate intestinal CYP3A and P-gp partially through producing OMVs to activate the TLR4 signaling pathway.

Small interfering RNA-mediated monocarboxylate transporter 1 silencing enhances sensitivity of nasopharyngeal carcinoma HNE1/DDP cells to cisplatin-induced apoptosis / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the effect of small interfering RNA (siRNA)-mediated silencing of monocarboxylate transporter 1 (MCT1) on the sensitivity of drug-resistant nasopharyngeal carcinoma HNE1/DDP cells to cisplatin (DDP)-induced apoptosis and explore the possible mechanism.</p><p><b>METHODS</b>The expression of MCT1 was analyzed in HNE1 and HNE1/DDP cells and in HNE1/DDP cells transfected with siRNA using Western blot. MTT assay was used to assess the inhibitory effect of different concentrations of DDP alone or in combination with MCT1 siRNA on the proliferation of HNE1/DDP cells. The apoptosis of cells treated with MCT1 siRNA or/and DDP (8 µmol/L) was assessed using flow cytometry with PI staining, and the mitochondrial membrane potential was detected using JC-1 staining assay; the expressions of Mcl-1, Bak, Bcl-2, and Bax were analyzed using Western blotting.</p><p><b>RESULTS</b>HNE1/DDP cells showed a high expression of MCT1, and MCT1 silencing using siRNA significantly increased the sensitivity of HNE1/DDP cells to DDP (P<0.05) and partly reversed DDP resistance of the cells. MCT1 silencing enhanced the sensitivity of HNE1/DDP cells to DDP-induced apoptosis. Treatment of HNE1/DDP cells with MCT1 siRNA combined with 8 µmol/L DDP for 24 h resulted in an apoptotic rate of (51.23∓2.86)%, significantly higher than that in cells treated with MCT1 siRNA or DDP alone (P<0.05). The combined treatment also reduced the mitochondrial membrane potential, down-regulated the expression of Mcl-1 and Bcl-2, and up-regulated the expression of Bax in the DDP-resistant cells.</p><p><b>CONCLUSION</b>MCT1 siRNA can enhance the sensitivity of HNE1/DDP cells to DDP-induced apoptosis, the mechanism of which may involve the down-regulation of Mcl-1 and Bcl-2 and up-regulation of Bax expression.</p>

Tie-1: A potential target for anti-angiogenesis therapy / 华中科技大学学报（医学）（英德文版）

The tyrosine kinase system angiopoietin (Ang)/Tie interacts with vascular endothelial growth factor pathway and regulates vessel quiescence in adults as well as later steps of the angiogenic cascade related to vessel maturation. Since all Angs are able to bind to Tie-2 but none binds to Tie-1, the function of Tie-2 and its ligands have captured attention. However, emerging evidence indicates unique roles of the orphan receptor Tie-1 in angiogenesis under physiological and pathological conditions. It is required for maintaining vascular endothelial cell integrity and survival during murine embryo development and in adult and may be involved in modulating differentiation of hematopoietic cells in adult. Tie-1 exhibits poor tyrosine kinase activity and signals via forming heterodimers with Tie-2, inhibiting Tie-2 signaling mediated by Angs. This inhibition can be relieved by Tie-1 ectodomain cleavage mediated by tumor- and inflammatory-related factors, which causes destabilization of vessels and initiates vessel remodeling. Up-regulated Tie-1 expression has been found not only in some leukemia cells and tumor related endothelial cells but also in cytoplasm of carcinoma cells of a variety of human solid tumors, which is associated with tumor progression. In addition, it has pro-inflammatory functions in endothelial cells and is involved in some inflammatory diseases associated with angiogenesis. Recent research indicated that Tie-1 gene ablation exhibited significant effects on tumor blood- and lymph-angiogenesis and improved anti-Ang therapy, suggesting Tie-1 may be a potential target for tumor anti-angiogenesis treatment.

Effect of alcohol extract of Plumula Nelumbini on carbon tetrachloride induced rat liver fibrosis: an experimental study / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the protective effect of alcohol extract of Plumula Nelumbini (AEPN) on carbon tetrachloride (CCl4) induced hepatic fibrosis rats and to explore its possible mechanism.</p><p><b>METHODS</b>Totally 32 male SD rats were randomly divided into four groups, i.e., the normal control group, the model group, the high dose AEPN group, and the low dose AEPN group, 8 in each group. 1,000 mg/kg AEPN was given to rats in the high dose AEPN group by gastrogavage at 10 mL/kg, once daily, while 500 mg/kg AEPN was given to rats in the low dose AEPN group by gastrogavage at 10 mL/kg, once daily. Hepatic fibrosis was induced by intraperitoneal injection of CCl4. Serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and albumin (ALB) were examined using automatic biochemical analyzer. Activities of superoxide dismutase (SOD), contents of malondialdehyde (MDA) and hydroxyproline (Hyp) in the hepatic tissue were determined using colorimetry. The degree of liver fibrosis was observed by HE staining and Masson staining. The expression of α-smooth muscle actin (α-SMA) was detected using immunohistochemistry.</p><p><b>RESULTS</b>(1) Compared with the normal control group, serum levels of ALT and AST obviously increased and the serum ALB level obviously decreased in the model group (all P < 0.05). After treated by AEPN, serum levels of ALT and AST were lowered. and the serum ALB level was higher (all P < 0.05). (2) Compared with the normal control group, collagen deposition was obviously seen in rats' livers of the model group, and pseudolobule had formed; inflammatory activities and fibrosis degrees were serious; contents of Hyp also increased (P < 0.05).After treated by AEPN, collagen deposition was obviously reduced with no obvious pseudolobule; inflammatory activities and fibrosis degrees were alleviated; contents of Hyp were also lowered (P < 0.05). (3) Compared with the normal control group, contents of MDA in the liver tissue obviously increased, while activities of SOD obviously decreased (P < 0.05) in the model group. After treated by AEPN, contents of MDA in the liver tissue decreased and the serum SOD level significantly increased (all P < 0.05). (4) Compared with the normal control group, the expression of α-SMA was obviously elevated in the model group (P < 0.05). After treated by AEPN, its expression was obviously lowered (P < 0.05).</p><p><b>CONCLUSIONS</b>AEPN could fight against CCl4 induced liver fibrosis in rats. Fighting against lipid peroxidation and inhibi- ting activation and proliferation of hepatic stellate cells might be possibly main mechanism.</p>

Effect of neferine on hepatic stellate cells in collagen-I, TIMP-1 and MMP-2 / 中国中药杂志

<p><b>OBJECTIVE</b>To observe the effect of neferine on Collagen-I, TIMP-1 and MMP-2 expressions and protein secretion of hepatic stellate cells.</p><p><b>METHOD</b>The hepatic stellate cell line HSC-T6 was cultured in vitro, and then randomly divided into 5 groups: the control group, the platelet-derived growth factor (PDGF) group and PDGF + neferine (2, 6, 10 micromol x L(-1)) groups. All of the groups were cultured for 48 h, and their cells were collected to extract mRNA and detect Collagen-I, TIMP-1 and MMP-2 expressions with RT-PCR. Their cell supernatants were also collected to determine the protein content of three factors with ELISA.</p><p><b>RESULT</b>Compared with the control group, PDGF could remarkably increase the Collagen-I, TIMP-1 and MMP-2 expressions and protein secretion of hepatic stellate cells. Compared with the PDGF group, PDGF + neferine (6, 10 micromol x L(-1)) groups showed a notable decrease in the Collagen-I and mRNA expression and protein secretion along with the increase in the concentration, whereas the PDGF + neferine (2 micromol x L(-1)) group showed no significant change in the Collagen-I and mRNA expression and protein secretion. Compared with the PDGF group, three PDGF + neferine groups showed no notable change in MMP-2 expression and protein secretion.</p><p><b>CONCLUSION</b>Neferine can inhibit the Collagen-I, TIMP-1 and mRNA protein expression and protein secretion of PDGF-induced HSCs along with the increase in the concentration, but with not remarkable effect on the MMP-2 expression and secretion.</p>

Expression of serum human epididymis protein 4 in epithelial ovarian cancer and its correlation with prognosis / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To study the characteristics of HE4 expression in patients with epithelial ovarian cancer, and to evaluate whether the pre-treatment serum human epididymis protein 4 (HE4) level is an independent prognostic factor in the patients.</p><p><b>METHODS</b>The clinicopathological characteristics and follow-up information of 112 patients with epithelial ovarian cancer were collected. The pre-treatment serum samples from these patients were measured for HE4 and CA125 expression. Serum HE4 levels were tested by a quantitative enzyme-linked immunosorbent assay (ELISA) and serum CA125 levels were tested using Elecsys kit. The correlation of HE4 and CA125 expressions with overall survival and other clinical data were analyzed.</p><p><b>RESULTS</b>The median level of pre-treatment serum HE4 and CA125 in the 112 patients was 415.5 pmol/L (26.9-3253.5 pmol/L) and 699 U/ml (5-17 694 U/ml), respectively. Serum HE4 level before treatment was significantly related to grade (r = 0.21, P = 0.037), stage (r = 0.40, P = 0.001), amount of ascites (r = 0.39, P = 0.001), serum CA125 level (r = 0.53, P = 0.001) and residual disease after surgery (r = 0.22, P = 0.027), but was not related to menopausal stauts (P = 0.115), revealed by Spearman correlation test.However, logistic multivariate regression analysis indicated that residual tumor size was not significantly correlated with pre-operative HE4 level (P = 0.259). The mean survival of the 112 patients was 53 months. Log rank test indicated that the overall survival in patients with higher HE4 level was significantly shorter than those with lower HE4 level (P = 0.001). Multivariate Cox proportional hazard model analysis revealed that the pre-treatment serum HE4 level and residual tumor size were independent prognostic factors for overall survival (P = 0.044 and P = 0.048).</p><p><b>CONCLUSION</b>Pre-treatment serum HE4 level is a valuable prognostic factor for the overall survival in patients with epithelial ovarian cancer.</p>

Study on effect of intensive treatment for refractory chronic hepatitis C patients / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To explore the effect of intensive treatment for refractory chronic hepatitis C, and to improve the sustained viral response (SVR) rate of treatment with interferon plus ribavirin by optimizing therapeutic dose and course.</p><p><b>METHODS</b>Patients who did not acquire response or partial response by standard therapy (PEG-IFN alpha subcutaneous injection weekly plus Ribavirin 10.5 mg/kg) every day were enrolled and retreated with intensive treatment of 10 MU interferon every other day or 360 microg pegylated interferon alpha-2a weekly according to patients' wishes, and ribavirin 15 mg/kg every day. Serum HCV RNA was detected at baseline,treatment week 4, 12 and every 12 weeks succedent and 24 weeks after treatment end. Course of treatment was 72 to 96 weeks according to viral response. SVR was the mark of therapeutic effect.</p><p><b>RESULTS</b>18 patients completed whole range therapy and follow-up, in which 12 patients acquired SVR, 5 patients treatment failure and 1 relapse. 3 patients acquired rapid viral response (RVR), and they all got complete Early Viral Response (cEVR) and SVR. RVR Patients' viral loads were significantly lower than that of patients who did not acquire RVR (t = 4. 687, P < 0.001). In 15 patients who did not acquire RVR, 8 patients acquired cEVR, and 9 acquired SVR. SVR rate of patients who were administered PEG-IFN alpha-2a was 4/5, 11 patients who acquired cEVR all acquired SVR, while in 7 patients who did not acquire cEVR, only 1 patient acquired SVR.</p><p><b>CONCLUSIONS</b>High percent patients, who did not acquire response or partial response by previous standard antiviral therapy, could gain SVR by intensive dose interferon plus Ribavirin. In intensive treatment procedure, adjusting and prolonging course according to viral response after HCV RNA turned negative were important measures to improve refractory Chronic Hepatitis C SVR rate.</p>

Analyzing hematopoietic development of mouse embryonic AGM region by tissue culture / 中国实验血液学杂志

To analyze hematopoietic kinetics of mouse embryonic aorta-gonad-mesonephros (AGM) region, an in vitro tissue culture method was developed in this study, partly based on previous reports. After 2 days of tissue culture, a significant number of erythro myeloid progenitors, as quantitated by colony forming assay was detected in the AGM region. Moreover, the cells from cultured E10.5 AGM region could generate 10.8 ± 3.5 colony-forming unit in spleen (CFU-S) per tissue on average. Transplantation of cultured E10.5-E11.0 AGM cells resulted in efficient (85.7% repopulated) and long-term (> 4 months) reconstitution of lethally irradiated adult recipients with remarkable chimerism [(51.12 ± 21.17)%]. The multilineage contribution of donor cells was validated by significant engraftment of myeloid and/or lymphoid cells in peripheral blood, bone marrow, spleen and thymus of recipients. Taken together, the tissue culture method can enable us to manipulate the AGM region in vitro, fulfilling a systematic evaluation of developmental kinetics of various hematopoietic precursor cells, particularly HSC, in normal and mutant mid-gestation mouse embryos.

RUNX1 regulates transcription activity of WNT5A in mouse bone marrow derived mesenchymal stem cells / 中国实验血液学杂志

This study was purposed to investigate the effect of RUNX1 on transcription activity of WNT5A promoter in mouse bone marrow derived mesenchymal stem cells (MSC), and to explore the mechanism by which bone marrow environments regulate MSC. RT-PCR was used to detect the expression of RUNX1 in MSC isolated from mouse bone marrow and cultured in vitro; the chromatin immunoprecipitation (ChIP) was used to investigate the direct in vivo interaction between the RUNX1 and WNT5A promoter; retrovirus system was utilized to introduce the RUNX1 gene into MSC to detect the regulation of RUNX1 on the transcription activity of WNT5A promoter. The results showed that mouse bone marrow derived MSC was positive for Oil Red O, van Kossa and toluidine blue staining respectively and RUNX1 expressed in MSC. WNT5A promoter could be bound by RUNX1, and the expression level of WNT5A was enhanced with the increase of RUNX1. It is concluded that RUNX1 expresses in mouse bone marrow derived MSC, WNT5A is a direct target gene of RUNX1 and its transcriptional activity is regulated by RUNX1.

Effect of endothelium-specific deletion of PTEN on hemangioblast development in mouse embryo AGM region / 中国实验血液学杂志

This study was aimed to investigate whether endothelium-specific deletion of PTEN can affect hemangioblast development in the AGM region of mouse embryos. Based on Cre/loxP system, the Tie2CrePten(loxp/loxp) and Tie2CrePten(loxp/wt) mouse embryos were obtained. The genotype was identified by PCR. After treated with type I collagenase, the AGM region was dispersed into single-cell suspension, and then was cultured in blast colony-forming cell (BL-CFC) media. The number of BL-CFC was counted 4 or 5 days later. The hematopoietic capacity of BL-CFC was detected in methylcellulose culture system and the endothelial potential was assessed by tube-like structure formation on Matrigel. The results showed that the number of BL-CFC in AGM region of Tie2CrePten(loxp/loxp) mouse embryo decreased as compared with Tie2CrePten(loxp/wt) embryo. Whereas the hematopoietic capacity of mutant BL-CFC was enhanced, the endothelial potential, as evaluated by tube-like structure formation in vitro, was significantly reduced. It is concluded that the endothelial PTEN is capable of exerting regulatory functions on both the numbers and the dual potential of hemangioblast in mouse AGM region.