The regulation of epigenetics on bone marrow mesenchymal stem cells (BMSCs) has been a research hot spot in medical area. This paper mainly summarizes the progress of the regulation of DNA methylation, histone acetylation, small interfering RNA (siRNA) induced gene silence and microRNA (miRNA) on BMSCs. Our analysis shows that the regulation of epigenetics on BMSCs plays a significant role in the repair of bone tissue, nervous tissue and cardiac muscle.
Acetylation ; Bone and Bones ; DNA Methylation ; Epigenesis, Genetic ; Hematopoietic Stem Cells ; Histones ; Humans ; Mesenchymal Stromal Cells ; cytology ; MicroRNAs ; Myocardium ; RNA, Small Interfering ; Wound Healing

Objective To investigate the expression of osteopontin(OPN) mRNA and its correlation with clinicopathologic features of glioma. Methods The expression of OPN mRNA was detected by semi-quantitive RT-PCR in 60 cases of gliomas and their correspondent normal tissues.The relationship between the relative content of OPN mRNA and clinicopathologic features of glioma was also analyzed. Results The positive rate of OPN mRNA expression was 73.3%(44/60) in our group.The OPN mRNA expression in normal brain tissue was all negative.Furthermore,the OPN mRNA expression was associated with the pathological grade of glioma.All patients were followed up for an average of 12 months.We did observed that the OPN mRNA expression positive group(44 cases) had recurrence in 36 patients and the negative group(16 cases) had only 2 case with recurrence (P

Objective To establish a high performance liquid chromatography (HPLC) method for the determination of geniposide in Diaojinyao powder. Methods The HPLC system consisted of the Fortis-C18 (4.6 mm × 250 mm, 5μm) column, the mobile phase consisted of HCN∶H2O (12∶88) , the flow rate was 1.0 ml/min, the column temperature was 30℃, The UV detector was set at 238 nm. Results The linear response range was 0.049~0.980mg/ml ( r=0.999 9). The average recovery of geniposide was 99.1%, and RSD was 1.66%. Conclusion The method is simple, rapid, accurate and repeatable. It can be applied in determination of Geniposide in Diaojinyao Powder.

Objective To explore the relationship between plasma Tumor necrosis factor-alpha(TNF-α),Interleukin-6(IL-6) levels and brain edema caused by hypertensive intracerebral henorrhage.Methods 62 patients with hypertensive intrscerebral hemorrhage( the observation group) and 50 healthy persons( the control group) were selected.The expression of plasma TNF-α and IL-6 were determined by ELISA pre-therapy and 1d,3d,7d,14d after treatment in two groups;The volume of cerebral edema was measured by CT.The relationship between plasma TNF-α,IL-6 levels and brain edema caused by hypertensive intracerebral hemorrhage were analyzed.Results Before treatment,the levels of TNF-α and IL-6 in the observation group were( 15.62 ±9.49)μg/L and (67.47 ±6.31 )ng/L,which were significandy higher than(8.28 ± 3.36) μg/L and(31.02 ± 3.51 ) ng/L of the control group( t =9.17,64.28,P =0.01 ),and Spearman analysis showed that the levels of TNF-α and IL-6 were positively correlated with the volume of cerebral edema(r=0.934,P=0.02;r=0.922,P =0.026).Conclusion There was an up-regulation of TNF-α and IL-6 levels in the plasma of patients with hypertensive intracerebral hemorrhage.TNF-α and IL-6 may promote the formation of cerebral edema during the course of hypertensive intracerebral hemorrhage.

Objective To explore the role of Toll-like receptor 7 (TLR7) and related signal transduction molecules in mechanisms underlying human papilloma virus (HPV) infection and condyloma acuminatum (CA) recurrence.Methods Peripheral blood was obtained from 30 healthy controls,35 patients with primary CA,32 patiens with recurrent CA and 30 patients with recurrent CA treated by imiquimod and ALA-PDT.Two-color flow cytometric analysis was used to detect TLR7 expression in different peripheral blood T cell subsets,Western blot to determine the expression levels of an adapter protein myeloid differentiation primary response gene 88 (MyD88),and signaling molecules including tumor necrosis factor receptor-associated factor (TRAF6),phosphatidylinositol3-kinase (PI3K),protein kinase B (AKT),p42/44 and nuclear factor-kappa B (NF-κB) in peripheral blood CD3+ T cells,from these subjects.Statistical analysis was carried out by Student's t test using the software SPSS 13.0.Results TLR7 was expressed in peripheral blood CD3+CD4+ T cells and CD3+CD8+ T cells from the healthy controls.Compared with the healthy controls,the patients with primary and recurrent CA showed no significant changes in TLR7 expression in CD3+CD8+ T cells,but a statistical increase in TLR7 expression in CD3+CD4+ T cells (23.3％ ± 8.4％ and 32.8％ ± 8.9％ vs.12.6％ ± 6.3％,t =4.72,10.76,both P ＜ 0.01).Decreased expression of TLR7 in CD3+CD4+ T cells was observed in patients treated with imiquimod and ALAPDT compared with the patients with recurrent CA (20.3％ ± 5.7％ vs.32.8％ ±8.9％,t =5.41,P ＜ 0.01).The protein expressions of MyD88,TRAF6,PI3K,p42/44 and NF-κB were significantly increased in CD3 + T cells,while the AKT protein expression experienced no significant changes in patients with primary or recurrent CA compared with the healthy controls.A significant decrease was observed in the protein expression of MyD88,TRAF6,p42/44 and NF-κB in the treated patients compared with those with recurrent CA.Conclusions TLR7,which is highly expressed in peripheral blood CD3+CD4+ T cells in patients with CA,may take part in the host immune response against HPV and serve as a recognition receptor for HPV infection.

Objective To discuss the clinical features of immunocompetent patients with Penicilliosis marneffei.Methods To analyze and summarize the clinical data of 4 immunocompetent patients with Penicilliosis marneffei.Results Clinical manifestation of patients centered on intermittent slight or mild fever,lymphadenectasis,skin eruptions,osteolytic destruction,anaemia,and leukocytosis.The cultural Penicillium marneffei in specimen such as blood,pus showed a higher positive rate.Amphotericin B and itraconazole was available in treatment.Conclusion Immunocompetent people can be infected by Penicillium marneffei,and they appear nonspecific in clinical manifestation after infection.A timely and effective antifungal therapy can improve the prognosis of patients.

Objective To investigate the epidemiological characterization , effect of prevention and control measures during an outbreak in a military unit caused by Mycoplasma pneumoniae.Methods All the cases were investigated to learn about their basic characteristics , clinical symptoms and aggregation activities using epidemiological cross-sectional study . Results From May 16 to June 11,2013, forty-nine confirmed cases and thirty-five suspected cases who were all males were found at an attack rate of 7.8%.The epidemic peak period was from May 27 to Jun 2(seven days), and the number of total cases was 66(75.9%).During the outbreak, the attack rate of the 10th cadet team, other cadet teams and a non-student population was 47.5%, 4.5% and 1.2% respectively.The difference was significant (P<0.01).The age of forty-nine confirmed cases ranged from 17 to 26 years old , the attack rate did not differ significantly between different age groups, and no aggregation was found in the place of birth and soldier source .The most frequent clinical symptoms were fever and cough for the confirmed cases , 62.5% of whom showed unilateral or bilateral lung inflammation change , while few positive lung symptoms were present .All the confirmed cases were hospitalized and no severe or critically ill cases were present.The outbreak was controlled effectively after implementation of case surveillance , contact precaution , termination of aggregation activities , dispersed habitation and prescription of azithromycin for disease prevention .Conclusion The confined and crowed environment for learning and training can increase the risk of M.pneumoniae outbreak , making it nec-essary to enhance disease prevention awareness , improve case management , live dispersed , reduce close contact and imple-ment personal hygienic measures .

Objective To establish a method for the determination of aristolochic acid A inPaishi granule.Methods The HPLC system consisted of the Phenomenex Luna C18(4.6 mm×250 mm, 5μm)column, the mobile phase consisted of acetonitrile and 0.01% HAc, gradient elution flow rate was 1.0 ml/min, the column temperature was 35℃, The UV detector was set at 250 nm.Results The linear response range was 0.029-0.580μg/ml (r=0.999 9). The detection limit and quantitation limit of aristolochic acid A inPaishi granule were 0.9 and 3.0 ng/ml. The average recovery of aristolochic acid A was 96.4%.Conclusion The method is high sensitivity, accurate, repeatable and high specificity,and can be used as an inspection method for safe use of Paishi granule.

Objective To study the biocompatibility of bone marrow mesenchymal stem cells (BMSCs) on acellular collagen matrix double-layer material.Methods BMSCs with acellular collagen matrix double-layer material were trained as experimental group,while separately cultured BMSCs as control group.The growth and proliferation of BMSCs on acellular collagen matrix double-layer material were investigated.Scanning electron microscope was used to observe the adherence of cells,and cell vitality was detected by CCK-8 method.Results The acellular collagen matrix double-layer material did not influence the growth and proliferation of BMSCs.The difference between the growth curves of experimental group and control group was not significant (P＞0.05).Conclusions The acellular collagen matrix double-layer material has acceptable biocompatibility.This research provides a scientific basis for the application of this composite material.

Objective To investigate hepatic pathohistological changes(including pathology,HBV markers in liver tissue)in patients with KBeAg negative chronic hepatitis B after adefovir therapy for 1 year.Methods 35 patients with HBeAg negative chronic hepatitis B were administered with 10mg adefovir once a day for one year.The needle biopsy of liver were performed before and after treatment.The routine HE stained liver tissue sections were evaluated and Knodell pathological score were done.HBsAg and HBeAg in liver tissue were examined by immunohisochemisty method.Results After 1 year,18,17 and 11 cases had a significant reduction of their total hepatic HAI score,necroinflammation and fibrosis score.The immunohistochemistry examination showed HBeAg in liver decreased significantly,but HBsAg had no obvious alteration.Conclusion Significant improvement in both necroin flammation and fibrosis can be obtained in the majority of patients treated with adefovir for 1 year.More significant improvement in live histology can be obtained after extended treatment.