Objective To design an integrated device for cleaning,sterilizing and drying the glass graduated pipette with considerations on its characteristics.Methods The integrated device had its shell made of 304 stainless steel and hardware part composed of three modules for control,cleaning and drying.The control module consisted of a human machine interface(HMI)touch screen,a programmable logic controller(PLC),solenoid valves and etc;the cleaning module was made up of an ultrasonic release disk,a heat preservation cylinder,a bracket and etc;the drying module comprised a blower,a heating plate,a heat preservation cylinder and connected pipes.The HMI was developed with the programming language of EasyBuilder,and the PLC control logic was written with SCL high-level programming language.Results The device developed could be used for cleaning,sterilizing and drying the glass graduated pipette,and the pipette could be stored in the device after drying.Conclusion The integrated device developed eliminates manual operation and enhances the efficiency of the cleaning,sterilization and drying of the glass graduated pipette.[Chinese Medical Equipment Journal,2025,46(4):108-112]

Objective To design an integrated device for cleaning,sterilizing and drying the glass graduated pipette with considerations on its characteristics.Methods The integrated device had its shell made of 304 stainless steel and hardware part composed of three modules for control,cleaning and drying.The control module consisted of a human machine interface(HMI)touch screen,a programmable logic controller(PLC),solenoid valves and etc;the cleaning module was made up of an ultrasonic release disk,a heat preservation cylinder,a bracket and etc;the drying module comprised a blower,a heating plate,a heat preservation cylinder and connected pipes.The HMI was developed with the programming language of EasyBuilder,and the PLC control logic was written with SCL high-level programming language.Results The device developed could be used for cleaning,sterilizing and drying the glass graduated pipette,and the pipette could be stored in the device after drying.Conclusion The integrated device developed eliminates manual operation and enhances the efficiency of the cleaning,sterilization and drying of the glass graduated pipette.[Chinese Medical Equipment Journal,2025,46(4):108-112]

italic>Acanthopanax senticosus is one of the genuine regional herb in Northeast China. In this study, we identified the germplasm resources of commercial A. senticosus samples based on atpI and atpB_rbcL according to the previous chloroplast genome sequencing results, and determinated the content of syringin by HPLC to evaluated the quality of commercial samples. A total of 80 A. senticosus samples were collected from 47 cities in 24 provinces. DNA was extracted to amplify the products of atpI and atpB_rbcL by PCR. The results showed that 7 haplotypes (H2, H5, H8, H10, H12, H14, H23) were formed by the combined analysis of the two gene fragments. H2 from Yichun in Heilongjiang, Shangzhi in Harbin, Suihua in Heilongjiang, Fushun in Liaoning, Benxi in Liaoning, Changbai in Jilin and Jingyu in Jilin were the dominant genotype, representing 58.75% of the total samples. H14 and H23 were the unique haplotypes of the producing area. It is speculated that the commercial A. senticosus samples with haplotypes of H14 and H23 are from Raohe, Shuangyashan, Heilongjiang and Mingshui, Suihua, Heilongjiang, respectively. HPLC analysis indicated that the content of syringin in 73.96% of the samples met the Pharmacopoeia standards. There was a significant difference in the content of syringin among the samples, ranging from 0.003 7% to 0.524 5%, with a difference of 0.520 8%, indicating that the quality of the samples in the market of A. senticosus was uneven. However, there were no significant differences in the contents of syringin in the commercial A. senticosus among different haplotypes. The content of syringin in the haplotype H23 in the market sample is relatively high, so it may be a germplasm with better quality. This study researched the germplasm resources and medicinal materials quality of commercial A. senticosus samples and will help guide the commercial circulation, reasonable medication of A. senticosus, and the screening of excellent germplasm.

Altitude ; Diabetes Mellitus, Type 2 ; Endothelial Progenitor Cells ; Glycated Hemoglobin A ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit/metabolism*

Objective To investigate the effect of fluid shear stress (FSS) on the expression of B lymphoma Mo-MLV insertion region 1 (Bmi-1) in bone mesenchymal stem cells (BMSCs) and possible signal transduction mechanism. Methods BMSCs were isolated from SD rats and FSS at different magnitude (0.5, 1.5, 3.0 Pa) and under different time phase (1, 2, 6, 24 h) were loaded by parallel-plate flow chamber system. The expression of Bmi-1 was measured by real-time RT-PCR at mRNA level and the levels of phosphorylated Akt (p-Akt) and extracellular signalregulated kinase 1/2 (p-ERK1/2) were detected by Western blotting. The signaling inhibitors, wortmannin (PI3K specific inhabitor) and PD98059 (ERK1/2 specific inhabitor), were used to investigate possible mechanical signal transduction pathway. Results Bmi-1mRNA expression increased when BMSCs were exposed to 1.5 Pa FSS for 1 h and reached the peak at 24 h. All FSS with different magnitude could increase Bmi-1 expression, especial at high FSS (3.0 Pa). Meanwhile, FSS resulted in a significant activation of p-Akt and p-ERK1/2 in BMSCs. After treated with wortmannin, the expression of Bmi-1 was inhibited prominently, however, PD98059, the expression of Bmi-1 did not change. Conclusions FSS can activate the expression of Bmi-1, the amount of Bmi-1 expression was closely related to the stimulating time and the magnitude of FSS, and Akt signal molecule plays an important role during the process. These findings provide significant references for studying the mechanical biological mechanisms of stem cell differentiation.

Objective To develop a clinical laboratory vehicle with advantages in mobility,deployment,automation and informatization to meet the requirements of disaster relief.Methods Ford transit V348 ambulance was used as the base,which was equipped with routine blood analyzer,routine urine analyzer,biochemical analyzer and etc.The same instruments,agents and procedures were adopted as those in the clinical laboratory department of rear hospital,and LIS,air cleaning system and necessary auxiliary units were also involved in the modification.Results The clinical laboratory vehicle increased the working efficiency while decreased the errors.Conclusion The vehicle fulfills mobile medical support for military operations other than war such as disaster relief,and thus is worthy promoting practically.

Autophagy is an important metabolic mechanism involved in stress responses of cells such as inflamma -tion.A close molecular connection between autophagy and inflammation .On the other side , some inflammatory me-diators can regulate autophagy and its translation;Autophagy is able to suppress the excessive inflammation through various pathway .Therefore , deficient autophagy may associate with inflammatory diseases such as Crohn 's disease ( CD) .

OBJECTIVETo explore the toxic effects of lead acetate on the apoptosis and ultrastructure of human renal tubular epithelial cells (HK-2).

METHODSAfter HK-2 cells were exposed to 5, 10 and 20 µmol/L lead acetate for 24 h, the morphological changes of HK-2 cells were observed by Hochest 33342-PI staining, and the ultrastructure changes of HK-2 cells were examined under a electron microscope, LDH activity and MDA content in supernatant of HK-2 cellular culture were detected by spectrophotometer, DNA damage of HK-2 was determined by DNA ladder and the apoptotic rates of HK-2 cells were measured by flow cytometry.

RESULTSThe morphological changes of apoptotic HK-2 cells in exposure group were observed by Hochest 33342-PI staining. The cytoplasm vacuoles, karyopycnosis, nuclear membrane vague and apoptotic bodies in HK-2 cells of exposure group were found under electron microscopy. LDH activity and MDA contents in exposure group increased significantly, as compared to control group (P < 0.01). The results of DNA Ladder showed that DNA damage of HK-2 cells in exposure group appeared. The apoptotic rates of HK-2 cells exposed to 5, 10, 20 µmol/L lead acetate were 14.16% ± 2.94%, 19.45% ± 2.73%, 25.01% ± 3.97%, respectively, which were significantly higher than that (5.81% ± 2.18%) in control group (P < 0.05).

CONCLUSIONLead acetate could remarkably induce the apoptosis of HK-2 cells and affect the kidney.

Apoptosis ; drug effects ; Cell Line ; Epithelial Cells ; cytology ; drug effects ; ultrastructure ; Humans ; Kidney Tubules, Proximal ; cytology ; drug effects ; ultrastructure ; Organometallic Compounds ; toxicity

BACKGROUNDHepatocyte growth factor (HGF) treats ischemic disease by promoting arteriogenesis, however, its mechanism of action is not known. The notch signaling pathway plays an important role in neovascularization. The relationship between the proliferation and migration ability of artery endothelial cells and the Dll4-Notch-Hey2 signaling pathway in the process of arteriogenesis was investigated as a mechanism of action of HGF.

METHODSBased on the prophase study cells and supernatant were harvested at the indicated time after human femoral artery endothelial cells (HFAECs) were infected with adenovirus-HGF (Ad-HGF) at 200 pfu/cell. Cells were analyzed for HGF expression and Notch1, Dll4 and Hey2 expression by ELISA and reverse transcription-PCR (RT-PCR). The changes in the proliferation and migration ability of HFAECs were observed by MTT and Transwell migration experiments. Ad-GFP-infected HFAECs were used as control.

RESULTSCompared with the control group the Ad-HGF group's HGF expression was not increased with time, and the induction by HGF of Notch1, Dll4 and Hey2 gene transcription was not enhanced with an increase of HGF. The proliferation ability of Ad-HGF-transduced HFAECs was enhanced and their migration ability was also enhanced in the presence of HGF.

CONCLUSIONSThrough activating the Dll4-Notch-Hey2 signaling pathway, HGF indirectly promotes the proliferation and migration ability of cells, so that offspring artery branches are formed.

Basic Helix-Loop-Helix Transcription Factors ; genetics ; metabolism ; Cell Line ; Enzyme-Linked Immunosorbent Assay ; Hepatocyte Growth Factor ; genetics ; metabolism ; Humans ; Intercellular Signaling Peptides and Proteins ; genetics ; metabolism ; Receptors, Notch ; genetics ; metabolism ; Repressor Proteins ; genetics ; metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Signal Transduction ; genetics ; physiology

OBJECTIVETo explore the effects of bone marrow-derived mesenchymal stem cells (BMSCs) transfected with adenoviral vector carrying hepatocyte growth factor (HGF, Ad-HGF) on burn wound healing.

METHODSBMSCs from male Wistar rats were separated and purified with Percoll separating medium by density gradient centrifugation and cultured with DMEM containing 20% fetal bovine serum (FBS). Then BMSCs were transfected with Ad-HGF at the optimal gene transduction efficiency of 100 multiplicity of infection (MOI). The efficiency of transfection and the expression of HGF in the suspension were detected by flow cytometry and enzyme linked immunosorbent assay (ELISA) respectively. Thirty-two female rats were subjected to 90 degree centigrade water for 12 seconds to induce a partial thickness skin burn. The animals were randomly divided into mesenchymal stem cells (MSCs) treatment group (Group A), Ad-HGF treatment group (Group B), Ad-HGF-modified MSCs treatment group (Group C) and saline control group (Group D). On days 3, 5, 7, 14 and 21 postburn, HE and Sirius red stain were performed to observe the burn wound healing and collagen content. The content of hydroxyproline in wounds was also detected. Transplanted cells and the expression of (sex-determining region Y) SRY gene were detected by in situ hybridization and polymerase chain reaction (PCR), while the expression of HGF in wound tissues was detected by ELISA.

RESULTSThe result of flow cytometry showed that the transfection efficiency was 86.41% at 100 MOI. Compared with the control group, the content of HGF in the supernatant after transfection increased time-dependently and peaked at 48 h, showing significant differences at 24 h, 48 h, 72 h and 96 h (P less than 0.01). Results of HE stain revealed that the range of re-epidermidalization in Group C was significantly larger than that in other groups in the first week. Three weeks postburn, the epidermis was significantly thicker in Group C than in other groups and the nails of dermis inserted into the derma of burn wounds. Sirius red stain showed that the content of collagen I in Group C was much less compared with that in other groups 21 days postburn. In situ hybridization revealed an expression of SRY gene in burned female rats, consistent with the finding of PCR. Immunohistochemistry demonstrated the largest increase of HGF expression in Group C, whose contents of hydroxyproline, however, decreased on day 7 postburn. Compared with other groups, the content of HGF in the wounds of Group C increased obviously on day 14 after transfection (P less than 0.05) and there was no significant difference among Groups A, B and D.

CONCLUSIONOur study suggests that transplantation of MSCs modified with Ad-HGF has positive effects on the healing of burn wounds probably through differentiation and release of relevant cytokines.

Adenoviridae ; genetics ; Animals ; Burns ; metabolism ; therapy ; Cells, Cultured ; Female ; Genetic Therapy ; Hepatocyte Growth Factor ; analysis ; genetics ; Humans ; Hydroxyproline ; analysis ; Male ; Mesenchymal Stem Cell Transplantation ; Mesenchymal Stromal Cells ; cytology ; metabolism ; Rats ; Rats, Wistar ; Transfection ; Wound Healing