Objective In this study, we try to understand the effects of microenvironment on the differentiation of mesenchymal stem cells (MSCs) by coculturing MSCs with mature cardiomyocytes or culturing MSCs in cardiomyocyte-lysate, in this study. Methods MSCs isolated from mature rats were either cocultured with cardiomyocytes isolated from new born rats with the ratio of 1 to 4, or cultured in the medium containing 4-fold cardiomyocyte-lysate obtained by repeated freezing and defrosting of rat myocardial cells. The morphology of MSCs under light microscopy were observed daily for 7 days and immunostaining against cTnT and CD31 was performed on the 7~ th day. MSCs cultured in ordinary medium were observed as the control. Results Both MSCs cocultured with cardiomyocytes and cultured in cardiomyocyte-lysate were differentiated into myogenic cells and expressed cTnT and CD31 at the 7th day of cultivation. The MSCs in the control group did not change in morphology and express cTnT or CD31. Conclusion Both myocardial cell coculturing system and cardiomyocyte-lysate system can be used to induce bone marrow MSCs to differentiate into cardiomyocyte-like cells and endotheliocyte-like cells.

OBJECTIVE: To investigate the effects of two types of temperature rinses on body temperature, inflammatory cytokine levels, and bleeding volume in percutaneous endoscopic lumbar discectomy. METHODS: Eighty patients underwent percutaneous endoscopic lumbar discectomy from January 2018 to December 2020 were selected and divided into experimental group (40 cases) and control group(40 cases). In experimental group, there were 19 males and 21 females, aged (38.8±9.8) years old;7patients on L_4,5 and 33 patients on L₅S₁;Body msss index(BMI) was (27.8±7.2) kg·m^-2. In contral group, there were 18 males and 22 females, aged (41.5±10.9) years old, 5 patients on L_4,5 and 35 patients on L₅S₁;BMI was (26.4±6.2) kg·m^-2. The patients in the control group were received normal saline rinse at room temperature, and the patients in the experimental group were received normal saline rinse heated to 37 ℃. Body temperature, chills, nausea, vomiting, and other adverse reactions were recorded. The levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-10 (IL-10) in two groups were recorded before and 2 hours after operation. Visual analogue scale (VAS) was used to evaluate the degree of lumbar pain in two groups before and 2 hours after surgery. Fibrinolytic-coagulation indexes with preoperative and 2 hours after surgery, including the D-dimer (DD), fibrinogen degradation products (FDP), activated partial thrombin time (APTT) and prothrombin time (PT) were recorder. Operation time and blood loss in two groups were recorded. RESULTS: The body temperature of both groups showed a downward trend, while the body temperature of the control group was lower than that of the experimental group. The levels of TNF-α, IL-6 and IL-10 in two groups were increased 2 hours after surgery compared with those before surgery(P<0.05), while the levels in experimental group were lower than those in control group(P<0.05). Postoperative VAS in experimental group 2.19±1.13 was significantly lower than that in the control group 3.38±1.35(P<0.05). The levels of DD and FDP at 2 hours after surgery in both groups were higher than those before surgery (P<0.05), while the levels of DD and FDP in the experimental group were higher than those in the control group (P<0.05). There was no significant difference in APTT and PT levels between two groups after operation (P>0.05). The blood loss in the experimental group of (45.2±14.1) ml was lower than that in the control group of (59.52±15.6) ml. The operation time of experimental group (46.7±13.8) min was less than that of control group (58.3±15.2) min(P<0.05). CONCLUSION Body temperature rinse can reduce the incidence of adverse reactions, alleviate local inflammatory reactions, reduce intraoperative blood loss and shorten the operation time.
Female ; Male ; Humans ; Adult ; Middle Aged ; Diskectomy, Percutaneous ; Interleukin-10 ; Body Temperature ; Interleukin-6 ; Saline Solution ; Tumor Necrosis Factor-alpha ; Intervertebral Disc Displacement/surgery* ; Lumbar Vertebrae/surgery* ; Diskectomy

Objective To investigate the manifestations of cardiac involvement in the patients with mucopolysacharidosis Ⅰ (MPS Ⅰ).Methods The clinical data of 10 MPS Ⅰ patients were collected.Electrocardiography (ECG) and echocardiography (Echo) were performed in all patients and then analyzed.Results Among the ten patients,seven were men.The onset age of MPS was (0.5 ～ 8.0) years old and the age of diagnosis was (1.8 ～ 20.0) years old.Two patients had grade 2 precordial systolic murmur.ECG was abnormal in three patients with right ventricular hypertrophy in two and right axis deviation in another one.Echo showed valvular thickening and insufficiency in nine patients,enlarged left atrium and ventricle in one patient,hapulmonary hypertension and right ventricular hypertrophy in two patients and abnormal left ventricular configuration in five patients.Conclusions Cardiac involvement is common in MPS Ⅰ patients and may present as valvular thickening with regurgitation,abnormal left ventricular configuration and pulmonary hypertension.The cardiac involvement progresses with age.ECG and Echo should be done regularly during follow-up of MPS Ⅰ patients.

Objective To explore the mechanisms responsible for different coronary artery lesions with involvement of nitric oxide(NO),endothelin-1(ET-1),matrix metalloproteinases-9(MMP-9) and the matrix metalloproteinase inhibitor-1(TIMP-1).Methods The cases undergone coronary anography were collected and divided into three groups:group A,30 patients with the coronary artery ectasia(7 cases of simple coronary artery ectasia;18 cases of the coronary artery ectasia coexisting a small amount of plaque);group B,38 patients with coronary atherosclerosis;group C,32 patients with with normal angiograph(14 cases of coronary artery completely normal;18 cases with a small amount of coronary plaque only).Plasma NO,ET-1,MMP-9 and TIMP-1 level were measured by ELISA method.Results There are significant differences among three groups on NO level,MMP-9 levels,NO/ET-1 and MMP-9/TIMP-1(P

AIM:ToobservetheeffectofcepharanthineonhumanlungadenocarcinomaLTEP-a-2cellgrowth, and to explore the changes of related microRNA ( miRNA) expression in the cells .METHODS:LTEP-a-2 cells were trea-ted with cepharanthine at concentrations of 0μmol/L, 10μmol/L, 20μmol/L and 40μmol/L.The growth inhibition rate was detected by MTT assay , and the cell morphological changes were observed under light microscope .The cell apoptosis was analyzed by flow cytometry .The expression of let-7c, miR-34a and miR-34b was measured by real-time PCR.RE-SULTS:Cepharanthine inhibited the cell activity of LTEP-a-2 cells in a dose-dependent manner .With the increase in cepharanthine concentration , the pyknosis of the cells was visible under the inverted microscope .Flow cytometry analysis found that different concentrations of cepharanthine induced the increase in the apoptotic rates of LTEP -a-2 cells.The re-sults of real-time PCR showed that the cepharanthine also increased the expression of let -7c, miR-34a and miR-34b.CON-CLUSION:Cepharanthine inhibits the growth of LTEP-a-2 cells, and induces apoptosis .Cepharanthine increases the ex-pression of let-7c, miR-34a and miR-34b, indicating that these miRNAs in LTEP-a-2 cells has the function as tumor sup-pressor genes .

According to the current situation of biochemistry teaching and the theoretical characteristics of constructivism,the necessity and feasibility of applying constructivism to the biochemistry teaching were analyzed.Consequently,the implementation strategies of constructivism theory in the process of biochemistry teaching were introduced in detail.Through the reasonable choice of teaching content and the optimal combination of various teaching methods,it was helpful not only to realize the student-centered active construction of knowledge,but also to improve the comprehensive quality of students.At last,we performed a dialectical thought on the constructivism theory.In the concrete teaching practice,the different teaching theories should be used rationally and comprehensively based on the actual situation to improve the teaching quality of biochemistry.

Objective To investigate the effects of baicalin on morphine-induced behavioral sensitization.Methods Locomotor activity was measured for 2h after administration with baicalin in mice.Hyperlocomotion induced by acute morphine (10 mg· kg-1,ip) and behavioral sensitization induced by repeated morphine were established.The level of dopamine of ventral tegmental area(VTA) and prefrontal cortex(PFC) in mice was tested by ELISA assay.Results Baiealin inhibited significantly both locomotor activity in mice (control (1095.8 ± 174.5) times,baicalin (899.6± 187.2),(724.2± 221.4),(609.1 ± 154.6) times ; P＜ 0.01) and hyperlocomotion induced by acute morphine(model (1518.2± 185.8) times,baicalin (1385.4±224.2),(1205.1 ± 174.6),(1100.3±235.1) times ; P＜0.01).Similar inhibition was also seen in the development and expression of morphine-induced behavioral sensitization(model(2096.2±304.6) times,baicalin (2004.2 ± 218.5),(1998.7-± 224.3),(1836.1 ± 233.5) times,P＜ 0.05 ; model (2124.2 ± 189.6) times,baicalin (1922.2± 314.7),(1524.1±289.2),(1477.4± 219.3) times,P＜0.01).Baicalin inhibited dopamine release in VTA and PFC of morphine-sensitized mice(model(457.6± 92.1,589.2 ±102.5) μg · L-1,baicalin(391.1±56.8) μg · L-1,(448.6± 99.3) μg · L-1; (324.5±66.2) μg · L-1,(368.7±45.9) μg · L 1 ; (234.3± 52.6) μg · L-1,(305.3±84.1) μg · L-1 ; P＜0.01,P＜0.01).Conclusion Baicalin inhibits the development and the expression of morphine-induced behavioral sensitization in mice,and this effect is related to the inhibition of dopamine release in VTA and PFC of mice.

IgG 4 related disease (IgG 4-RD) is an immune medicated rare disease, characterized with chronic inflammation and fibrosis in the involved organs, it is a systemic disease affected nearly every anatomic site of the body, usually involvement of multiple organs, and with diverse clinical manifestations. Due to the the relative novelty of the disease and under-recognition, the overall level of diagnosis and treatment in China is uneven. Till now, there is no relevant expert consensus or guidance of IgG 4-RD in China. In order to further improve the understanding and standardize the management of IgG 4-RD, on the basis of summarizing domestic and international experience, the China Alliance For Rare Diseases, together with the Chinese Rheumatology Association, organized an expert group and established the Chinese expert consensus on the diagnosis and treatment of IgG 4 related diseases.

Atherosclerosis ; blood ; prevention & control ; Cardiovascular Diseases ; blood ; drug therapy ; prevention & control ; Cholesterol ; blood ; Humans ; Hypercholesterolemia ; drug therapy ; Practice Guidelines as Topic

Objective To evaluate the differences among five representative and useful Doppler parameters in the diagnosis of the three common types of renal artery stenosis (RAS). Methods Five Doppler parameters including renal peak systolic velocity (RPSV), renal-aortic ratio (RAR), renal-interlobar ratio (RIR),acceleration time (AT),and resistant index (RI) were measured in 221 patients before renal arteriography. Differences between the groups of patients with various clinical causes of RAS were analyzed by Chi-Squared test. One-way ANOVA or t test were used to compare the means between different groups.The optimal cutoff value was determined with the maximum sum of sensitivity and specificity. Results Of the 442 renal arteries (main and accessory renal arteries) demonstrated at arteriography,214 were normal or stenosed less than 50 %, 204 stenoses 50% - 99 %, and 24 occlusions. RIR, RAR and RI were significantly different between the atherosclerotic and non-atherosclerotic RAS groups (P ＜0.05), while RPSV and AT were not. The optimal cutoff values of RAR,RIR and RI for detecting RAS between the atherosclerotic and non-atherosclerotic groups were much different (2.5 versus 1.9, 5. 1 versus 6.5, 0.57 versus 0.50,respectively) ,but those of RPSV and AT were similar or the same (170 cm/s versus 200 cm/s,51 ms versus 51 ms,respectively). Conclusions In the case of RAS (diameter reduction≥50%),it is advised to establish separate cutoff values of RAR, RIR and RI according to atherosclerotic and non-atherosclerotic RAS, but the same cutoff value of RPSV and AT can be applied. RIR is a good Doppler parameter in the diagnosis of RAS,especially atherosclerotic and fibromuscular dysplasia RAS.