AIM: Mesenchymal stem cells (MSCs) isolated from human umbilical cord blood can differentiate into hepatocyte-like cells under a suitable induction condition. The optimal condition is still unclear. This study investigated the feasibility of differentiation of MSCs isolated from human umbilical cord blood into hepatocyte-like cells with hepatocyte growth factor (HGF) and interleukin-6 (IL-6) in vitro to find a new cell source for live tissue engineering. METHODS: The experiment was performed from March to September 2007 at the Central Laboratory of First Hospital of Lanzhou University. ①Three cases of umbilical cord blood were collected from full-term pregnant women. Pregnant women had signed an informed consent. The experiment was approved by Hospital’s Ethical Committee. ②MSCs from umbilical cord blood were separated by density gradient centrifugation and adherent method. Cell surface molecule was measured by flow cytometry. Third passage of cells were divided into four groups and cultured in DMEM medium with HGF (HGF group), IL-6 (IL-6 group), HGF+IL-6 (HGF+IL-6 group) or no growth factor (control group). ③The characteristics of proliferation and growth of MSCs were studied by microscopy and methyl thiazolyl tetrazolium (MTT). The phenotypes of MSCs were identified by flow cytometry and immunohistochemical method. Albumin levels in culture supernatants were determined with enzyme-labeled immunosorbent assay (ELISA). RESULTS: ①Growth and division of adherent cells obtained from human umbilical cord blood were good. The shape of MSCs changed into triangle, polygonal or round on days 21-28 in induction groups. ②Positive staining reaction for alpha fetoprotein (AFP) on day 7, for CK18 on days 21, 28 after induction. Albumin production by induced MSCs increased in a time-dependent manner. The positive percents of every hepatocytic marker were higher in the HGF+IL-6 group than in the IL-6 group and HGF group (P

Objective To explore the possibility of differentiation of mesenchymal stem cells isolated from patients with hepatocirrhosis into hepatocyte-like cells induced by EGF and HGF and to lay basis for transplanted autologous bone marrow MSCs in treatment of liver disease at terminal stage.Methods Bone marrow cells were obtained from volunteers with liver cirrhosis.MSCs were separated by density gradient centrifugation and were cultured through adhere culture.MSCs were cultured in DMEM medium with HGF,EGF,HGF+EGF or no growth factor.The phenotypes of MSCs were identified by flow cytometry,immunohistochemistry,and Albumin levels in culture supernatants were determined by ELISA.Results Growth and division of adherent cells obtained from the patients with hepatocirrhosis were good and the phenotypes of MSCs were CD29 positive and CD34 negative.The shape of MSCs changed from long fusiform to polygonal or round on 21th-28th days in grow factor induced groups.Immunocytochemical analysis for CK18 and AFP showed positive staining reaction for AFP on 7th day,for CK18 on 21st and 28th day in grow factor induced groups with MSCs-induced Alb production increasing in a time-dependent manner.No markers of hepatocyte linear cells were detected in no growth factor induction group.Conclusion Both HGF and EGF can induce mesenchymal stem cells to differentiate hepatocyte-like cells alone or coordinately.

Objective:To explore the necessity of the preventive use of antibiotics and the effects of age and operation time on the efficacy of inguinal hernia repair without tension,and to elucidate the clinical significance of the preventive application of prophylactic antibiotics in inguinal hernia repair without tension.Methods:A total of 228 patients with inguinal hernia repair without tension were selected,amomg them 42 cases with high infection factors were treated with antibiotics (treated group),and 186 cases were not treated with antibiotics(untreated group) during the preoperative period.The prophylactic antibiotics were given 30 min before surgery,and the conventional dose was not used more than 48 h after surgery.All the cases were treated with artificial repair materials for the procedure of inguinal hernial repair without tension.The age,highest body temperature,white blood cell count,operation time,hospitalization time,and postoperative body temperature of all the 228 cases were recorded and analyzed statistically.Results:The preoperative and postoperative white blood cell counts had significant differences between the patients<60 years and the patients≥60 years in untreated group (P<0.05);there were no significant differences in the operation time,hospitalization time and body temperature between the patients<60 years and the patients≥60 years in untreated group (P>0.05).Compared with the patients with the operation time>90 min,the white blood cell count and hospitalization time of the patients with the operation time ≤90 min were increased (P<0.05).There were no significant differences of the body temperature and age between the patients with the operation time >90 min and the patients with the operation time≤90 min (P>0.05).The white blood cell count,operation time,hospitalization time and postoperative body temperature of the patients between treated group and untreated group had no significant differences (P>0.05).Conclusion:The use of antibiotics in the high-risk patients and non-use of antibiotics in the majority of elective inguinal hernia repair without tension can ensure the safe and performability of the patients.

We established a rapid detection method of New Delhi Metallo-beta-Lactamase Gene (NDM-1) based on Loop-mediated Isothermal Amplification (LAMP). With the application of LAMP, we designed four sets of LAMP premiers, using NDM-1 gene as the target sequence, and selected the set of optimal primers. Meanwhile, we established optimal reaction systems and conditions to carry out the sensitivity and specificity experiments. The experiment results showed that the whole detection process took only one hour and could be observed visually. In the experiment of sensitivity, NDM-1 gene had a detection limit of 6 copies in each reaction. In the experiment of specificity, we detected NDM-1 gene in 4 pathogen strains (Klebsiella pneumoniae, Escherichia coli, Staphylococcus aureus, Streptococcus pneumoniae), and the total DNA from intestinal microbes and the total DNA from soil microbes. We had not detected the amplification reactions. The detection method established could rapidly detect NDM-1 gene and visualize the experiment result. The method is easy to operate and has high sensitivity and specificity and thus has great application value in basic research laboratories, emergent detection and spot detection.
Bacteria ; enzymology ; genetics ; Bacteriological Techniques ; methods ; DNA, Bacterial ; genetics ; Escherichia coli ; enzymology ; genetics ; Klebsiella pneumoniae ; enzymology ; genetics ; Nucleic Acid Amplification Techniques ; methods ; Sensitivity and Specificity ; Staphylococcus aureus ; enzymology ; genetics ; Streptococcus pneumoniae ; enzymology ; genetics ; beta-Lactamases ; genetics

Neuroendocrine prostate cancer(NEPC) is a prostate cancer subtype with a very high degree of malignancy and a special molecular phenotype.NEPC is not sensitive to endocrine therapy, and there are currently no specific drugs, so there is a lack of effective clinical treatment.New advances in NEPC therapeutic include chemical therapy, targeted drug therapy based on molecular phenotype and other non-targeted drug therapy. This article summarizes the current treatment methods, pharmaceutical, and clinical research results for NEPC, aiming to deepen clinicians' more comprehensive understanding of NEPC patients' treatment strategies.

Objective:To investigate and analyze the somatic symptom disorder, anxiety and depression in patients with myocardial bridge.Methods:A total of 276 patients with myocardial bridge diagnosed by coronary angiography (CAG) were enrolled in the department of cardiology of Renji hospital in Shanghai from June to December in 2016. There were 151 cases of simple myocardial bridge (no coronary stenosis or coronary artery stenosis <30%) and 125 cases of complex myocardial bridge (combined with coronary stenosis >30%). A total of 1067 patients with myocardial bridge without coronary angiography were collected at the same time. Self-rating somatic symptom scale (SSS), generalized anxiety disorder (GAD-7) and patient health questionnaire (PHQ -9) were given to these patients during hospitalization. At the same time, somatic symptoms disorder and anxiety and depression in the myocardial bridge group and non-myocardial bridge group were compared.Results:The prevalence of somatic symptom disorder in patients with myocardial bridge was higher than that in non-myocardial bridge patients (35.86% vs 28.30%, P<0.05). There was significant correlation between somatic symptom disorder and depression and anxiety, with correlation coefficients of 0.629 and 0.565, respectively. The prevalence of depression and anxiety in myocardial bridge patients was higher than that in non-myocardial bridge patients (depression: 23.91% vs 22.11%. P=0.467; anxiety: 17.02% vs 14.15%, P=0.22), but there was no statistical difference. For male patients or female patients, the prevalence of somatic symptom disorder, depression and anxiety in the simple myocardial bridge patients were higher than those in the complex myocardial bridge patients, but there was no statistical difference. The most common non-specific somatic symptoms disorder in patients with myocardial bridge were fatigue (64.5%), followed by sleep disorders (63.8%) and decreased attention (63.0%). Conclusion:The somatic symptom disorder in patients with myocardial bridge is significantly higher than that in non-myocardial bridge group. Especially for patients with myocardial bridge with non-specific somatic symptoms, early identification of somatic symptoms disorder of myocardial bridge patients will be beneficial to proper clinical invitation.

Objective: To investigate the change of serum microRNA-15 a(miR-15 a) expression level in patients with gestational diabetes mellitus and its relationship with maternal and infant adverse outcomes. Methods: 143 cases of gestational diabetes mellitus patients were selected as the study group, and 124 healthy pregnant women were selected as the control group, and the expression levels of serum miR-15 a of the two groups were detected by real time fluorescent quantitative reverse transcription polymerase chain reaction(qRT-PCR). Follow up to delivery, the adverse maternal and infant outcomes of the two groups were observed, and the relationship between the expression level of serum miR-15 a and the adverse outcomes of maternal and infant in gestational diabetes mellitus was analyzed by multivariate Logistic regression analysis method. Results: The expression level of serum miR-15 a in the study group was higher than that in the control group, and the difference was statistically significant(P<0.05). The incidence rates of abortion, premature rupture of membranes, polyhydramnios, postpartum hemorrhage, postpartum infection, premature infants, macrosomia, fetal distress, neonatal asphyxia, neonatal respiratory distress syndrome and neonatal hypoglycemia and the total incidence rates of maternal and perinatal adverse outcomes in the study group were higher than those in the control group(P<0.05), but there was no significant difference in the incidence rate of fetal death between the study group and the control group(P>0.05). The proportions of age>35 years old, pre-pregnancy body mass index ≥24.0 kg/m2, history of adverse pregnancy and childbirth and poor blood glucose control and the expression level of serum miR-15 a in poor maternal outcome group and poor perinatal outcome group were higher than those in good maternal outcome group and good perinatal outcome group(P<0.05), and multivariate Logistic regression analysis showed that the above indicators were the risk factors of adverse maternal and infant outcomes in patients with gestational diabetes mellitus(P<0.05). Conclusion The expression level of serum miR-15 a in gestational diabetes mellitus patients abnormally increases, and it can increase the risk of adverse maternal and infant outcomes, which is closely related to the occurrence of adverse maternal and infant outcomes. Besides, the age, pre-pregnancy body mass index, adverse pregnancy history, blood glucose control also have a certain impacts on the occurrence of adverse maternal and infant outcomes in patients with gestational diabetes mellitus.

Objective To develop a questionnaire on the transitional care needs of patients undergoing arthroscopic day surgery and to test its reliability and validity.Methods Based on the Omaha Question Classification System,the questionnaire item pool was constructed after literature reviews and qualitative interviews.A questionnaire-based scale was drafted based on the established item pool by carrying out two rounds of consultation with 15 experts in clinical nursing,nursing management,clinical medicine,rehabilitation medicine,and other fields from 6 provinces or cities in China.Reliability and validity of the scale were tested using convenience sampling,involving 280 patients with arthroscopic day surgery from 4 general hospitals in Jinan of Shandong province,China,between March and August 2023.Results The response rates for the two rounds of expert consultation were 83.33%and 100.00%,respectively.The authority coefficients of the two rounds both was 0.82,and the coordination coefficients for the 2 rounds were 0.169 and 0.218,respectively.In the first round,the average importance rating of secondary index was from 4.13 to 4.80 with the coefficient of variation from 0.086 to 0.208,and the full score ratio from 33.33%to 80.00%.In the second round,the average importance rating of secondary index ranged from 4.20 to 5.00 with the coefficient of variation from 0.00 to 0.18,and the full score ratios from 40%to 100.00%.A total of 280 patients completed the survey.The overall Cronbach's α coefficient of the scale was 0.922,the overall split-half reliability was 0.79,the scale-level content validity index(S-CVI)and the item-level content validity index(I-CVI)of the total scale all was 1.The KMO value of exploratory factor analysis was 0.925,the Bartrett spherical test value was 5456.320(P<0.001),and the cumulative variance contribution rate was 63.319%.After the reliability and validity tests,the scale was finalised and determined to consist of four dimensions with 30 items:environmental field(2 items),psychosocial field(5 items),physiological field(15 items)and health-related behavior field(8 items).Conclusion The questionnaire on the transitional care needs of patients undergoing arthroscopic day surgery has good reliability and validity and makes it an effective assessment tool for the transitional care need of arthroscopic day surgery patients.

There is increasing evidence that the activation of glucagon-like peptide-1 receptor(GLP-1R)can be used as a therapeutic intervention for cognitive disorders.Here,we have screened GLP-1 R targeted com-pounds from Scutellaria baicalensis,which revealed baicalein is a potential GLP-1 R small-molecule agonist.Mitophagy,a selective autophagy pathway for mitochondrial quality control,plays a neuro-protective role in multiple cognitive impairment diseases.We noticed that Glp1r knock-out(KO)mice present cognitive impairment symptoms and appear worse in spatial learning memory and learning capacity in Morris water maze(MWM)test than their wide-type(WT)counterparts.Our mechanistic studies revealed that mitophagy is impaired in hippocampus tissue of diabetic mice and Glp1r KO mice.Finally,we verified that the cognitive improvement effects of baicalein on diabetic cognitive dysfunction occur through the enhancement of mitophagy in a GLP-1 R-dependent manner.Our findings shed light on the importance of GLP-1 R for cognitive function maintenance,and revealed the vital significance of GLP-1R for maintaining mitochondrial homeostasis.Furthermore,we identified the therapeutic potential of baicalein in the treatment of cognitive disorder associated with diabetes.

Objective:To evaluate a new type of draw-bar skin stretcher in repair of full-thickness skin defects.Methods:From May 2015 to January 2019, 52 patients with full-thickness skin defects were repaired with a new type of draw-bar skin stretcher at Daping Hospital, Army Medical University. They were 40 males and 12 females, aged from 4 to 61 years (average, 37.1 years). Their skin was stretched for primary wound closure. When primary wound closure failed, skin stretching was performed again to close the wound depending on the wound condition. When the Pinch test was negative after skin stretching, the wound was sutured directly. In cases of positive Pinch test, a skin graft or flap was used to repair the remaining wound. At 12 months after surgery, scar contracture and size of skin graft or flap were observed and wound healing after skin stretching was evaluated in comparison with the original wound.Results:After skin stretching, one-stage wound closure was achieved in 36 cases and multi-stage wound closure in 8 cases; of the remaining 8 cases, 2 were repaired by skin graft and 6 by skin flap after their wounds were reduced by skin stretching. In one-stage closed wounds, infection occurred in 3 cases and marginal necrosis in 5 cases; in the wounds repaired by skin graft or flap, no infection or necrosis was observed. The 12-month follow-up for all the patients showed fine healing of all the wounds after one-stage or multi-stage closure, linear scar, absence of scar contracture, and smaller wound sizes than the original ones after skin graft or flap repair.Conclusions:Skin stretching using our new type of draw-bar skin stretcher is an effective treatment for skin wounds. It can replace traditional skin grafting and flap surgery in some cases, but its indications should be strictly followed to avoid related complications.