AIM To establish an HPLC method for the simultaneous content determination of 3′-hydroxy-puerarin,hydroxysafflor yellow A,puerarin,puerarin apigenin,3′-methoxypuerarin,daidzein,stilbene glycoside,luteolin side,genistein side,luteolin B and rosmarinic acid in Naomaitai Capsules.METHODS The analysis was performed on a 30℃ thermostatic Kromasil C18 column(250 mm×4.6 mm,5 μm),with the mobile phase comprising of acetonitrile-water(containing 1.0 g/L phosphoric acid)flowing at 0.8 mL/min in a gradient elution manner,and the detection wavelength was set at 280 nm.Subsequently,principal component analysis and cluster analysis were made.RESULTS Twelve components showed good linear relationships within their own ranges(r＞0.999 0),whose average recoveries were 97.00%-99.00% with the RSDs of 0.86%-1.82% .Ten batches of samples were clustered into four categories,the accumulative variance contribution rate of four principal components reached 86.262% .CONCLUSION This simple,stable,reliable and accurate method can be used for the quality control of Naomaitai Capsules.

Humans ; Colorectal Neoplasms/genetics* ; Esophageal Neoplasms ; Genetic Predisposition to Disease ; Genotype ; Phosphoinositide Phospholipase C/genetics* ; Polymorphism, Single Nucleotide

BACKGROUND: Human umbilical cord mesenchymal stem cells (hUCMSCs) have emerged as promising therapy for immune and inflammatory diseases. However, how to maintain the activity and unique properties during cold storage and transportation is one of the key factors affecting the therapeutic efficiency of hUCMSCs. Schisandrin B (SchB) has many functions in cell protection as a natural medicine. In this study, we investigated the protective effects of SchB on the hypothermic preservation of hUCMSCs. METHODS: hUCMSCs were isolated from Wharton’s jelly. Subsequently, hUCMSCs were exposed to cold storage (4 °C) and 24-h re-warming. After that, cells viability, surface markers, immunomodulatory effects, reactive oxygen species (ROS), mitochondrial integrity, apoptosis-related and antioxidant proteins expression level were evaluated. RESULTS: SchB significantly alleviated the cells injury and maintained unique properties such as differentiation potential, level of surface markers and immunomodulatory effects of hUCMSCs. The protective effects of SchB on hUCMSCs after hypothermic storage seemed associated with its inhibition of apoptosis and the anti-oxidative stress effect mediated by nuclear factor erythroid 2–related factor 2 signaling. CONCLUSION These results demonstrate SchB could be used as an agent for hypothermic preservation of hUCMSCs.

Aim To observe the effect of Gupi Xiaoji Decoction (GPXJY) on the structure and function of mitochondria of human hepatoma cell HepG2 cells and explore its possible mechanism. Methods CCK8 was used to detect cell proliferation, Mito-Tracker Green fluorescence staining was used to observe the mitochondrial structure, flow cytometry was used to detect the membrane potential, Elisa was used to detect the ATP content, fluoroscopic electron microscopy was used to observe the microstructure changes, and high-content screening(HCS) was used to detect the related proteins. Results Fluorescence staining showed that GPXJY damaged the mitochondria of HepG2 cells and decreased the content of ATP. The results of flow cytometry showed that GPXJY could reduce the mitochondrial membrane potential of HepG2 cells. The results of electron microscope showed that GPXJY made the mitochondria of cancer cells swell and so on. HCS found that GPXJY significantly reduced the average fluorescence intensity of Bcl-2 in HepG2 cells, and significantly increased the average fluorescence intensity of apoptosis promoting proteins Bax, cytochrome-c, caspase-3 and cleaved-caspase-3, which was statistically significant. Conclusion GPXJY can regulate the structure and function of mitochondria in HepG2 cells.

Aim To investigate the effect of the aryl hydrocarbon receptor (AhR) on the expression of inflammatory factors in macrophages RAW264. 7 induced by pyocyanin (PCN) and the regulatory mechanism of its signaling pathway. Methods RAW264. 7 cells were treated with different concentrations of PCN for 24 h, respectively, and the effect of PCN on cell activity was detected by CCK8 assay to determine the optimal PCN concentration for manufacturing infection models. The cells were divided into the control group (given 0. 1% dimethyl sulfoxide DMSO), PCN group, PCN + AhR inhibitor (CH223191) group, and PCN + AhR agonist (FICZ) group, and the expression of AhR was detected by immunofluorescence. The expression levels of inflammatory factors (IL-6, IL-1β, and TNF-α) were detected by ELISA. The protein expression of AhR, pp38 MAPK and p-p65NF-κB, was detected by Western blotting. Results PCN induced a significant quantitative effect on AhR expression in RAW264. 7 cells. CH223191 increased PCN-induced inflammatory factor secretion and enhanced the phosphorylation of p38MAPK and p65NF-κB compared with the control group. FICZ decreased PCN-induced inflammatory factor production and reduced the phosphorylation of p38MAPK and p65NF-κB phosphorylation capacity. Conclusions AhR can regulate PCN-induced inflammatory factor expression in RAW264. 7 cells, and the p38MAPK/p65NF-κB signaling pathway may be an essential pathway for the involvement of AhR in immune regulation.

Objective: To establish an ultra-sensitive, ultra-fast, visible detection method for Vibrio parahaemolyticus (VP) . Methods: We established a new method for detecting the tdh and trh genes of VP using clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 12a (CRISPR/Cas12a) combined with recombinase polymerase amplification and visual detection (CRISPR/Cas12a-VD). Results: CRISPR/Cas12a-VD accurately detected target DNA at concentrations as low as 10 ^-18 M (single molecule detection) within 30 min without cross-reactivity against other bacteria. When detecting pure cultures of VP, the consistency of results reached 100% compared with real-time PCR. The method accurately analysed pure cultures and spiked shrimp samples at concentrations as low as 10 ² CFU/g. Conclusion The novel CRISPR/Cas12a-VD method for detecting VP performed better than traditional detection methods, such as real-time PCR, and has great potential for preventing the spread of pathogens.
CRISPR-Cas Systems ; Nucleic Acid Amplification Techniques/methods* ; Recombinases/genetics* ; Vibrio parahaemolyticus/genetics*

Colorectal Neoplasms/genetics* ; Gene Expression ; Humans ; Polymorphism, Single Nucleotide ; RNA, Long Noncoding/genetics*

OBJECTIVE: To investigate the optimal time window for observation of catheter-induced valve injury that mimics calcified aortic valve disease in mice. METHODS: A catheter was inserted into the right common carotid artery of 8-week-old C57BL6 mice under ultrasound guidance, and aortic valve injury was induced using the guide wire.At 4, 8 and 16 weeks after modeling, the mice were subjected to ultrasound measurement of the heart short axial shortening rate, aortic valve peak velocity and aortic valve orifice area.Grain-Eosin staining was used to observe the changes in the thickness of the aortic valve, and calcium deposition in the aortic valve was assessed using Alizarin red staining.Immunofluorescence assay was performed to detect the expression of alkaline phosphatase (ALP) in the aortic valve. RESULTS: At 4, 8 and 16 weeks after modeling, valve thickness (P=0.002), calcium deposition (P < 0.0001) and the expression of osteogenic protein ALP (P=0.0016) were significantly increased, but their increments were comparable at the 3 time points of observation. CONCLUSION In mouse models of calcific aortic valve disease induced by catheter valve injury, 4 weeks after the injury appears to be the optimal time window for observation of pathophysiological changes in the aortic valves to avoid further increase of the death rate of the mice over time.
Animals ; Mice ; Aortic Valve/metabolism* ; Calcium/metabolism* ; Mice, Inbred C57BL ; Aortic Valve Stenosis/metabolism* ; Catheters ; Osteogenesis ; Cells, Cultured

Objective:To establish the grade evaluation method for Codonopsis Radix slices based relative quality constants， in order to provide scientific theoretical basis for grading of Codonopsis Radix slices. Method:Through literature and market research，the main production areas of Codonopsis Radix slices were determined，and 67 batches of Ludangshen slices（52 batches） and Baitiaodang slices （15 batches） were collected. The appearance traits （average quality and average thickness of Codonopsis Radix slices） were observed and measured. According to Chinese Pharmacopoeia （2015 edition）， the extract and the content of Codonopsis pilosula polysaccharide was determined by phenol-sulphoacid method. Then the relative quality constant was calculated，and the results of grade evaluation were evaluated through systematic cluster analysis and correlation analysis. Result:Relative quality constants of 67 batches of Codonopsis Radix slices were between 0.32-2.97. If these samples were divided into three grades：the first-grade relative quality constants were greater than or equal to 2.08，the second grade was greater than or equal to 0.89 but less than 2.08，while the third grade was less than 0.89. The results of systematic cluster analysis showed that 67 batches of Codonopsis Radix slices were clustered into 3 categories，and the results were basically consistent with the classification. The correlation analysis showed a positive correlation between the content of the extracts and the polysaccharide content （P<0.05）. Conclusion:This method links the extrinsic characteristics to the intrinsic quality，and objectively grade Codonopsis Radix slices， so as to provide a basis for its grade standards.