Objective: To study the formation regularity and kinetic parameters of advanced glycation end-products during the processing of boiled Cervi Cornu Pantotrichum (CCP). Methods: UV-visible spectrophotometry and UPLC-MS/MS method were used to determine the change of browning index and content of typical advanced glycation end-products, Nε-(carboxymethyl) lysine and Nε-(carboxyethyl) lysine, of the processing system of simulated boiled CCP. The formation regularity and kinetic parameters of advanced glycation end-products during the processing of boiled CCP were discussed by constructing glucose and lysine to simulate the Maillard reaction system of CCP processing. Results: The activation energy of browning reaction, Nε-(carboxymethyl) lysine and Nε-(carboxyethyl) lysine reaction during processing of boiled CCP were 5.07, 40.44 and 78.47 kJ/mol, respectively, and all of them were zero-order kinetics. The activation energies of the above reactions in the baking process were 6.72, 89.34 and 164.77 kJ/mol, respectively, and all of them were zero-order kinetics. Compared to the formation of Nε-(carboxymethyl) lysine, the formation of Nε-(carboxyethyl) lysine required higher activation energy and was more difficult to occur. Conclusion: The temperature changed in the baking process has a significantly higher effect on the kinetic parameters of the advanced glycation end-products than in the boiling process. Long-term higher baking temperature resulted in more advanced glycation end-products produced in the boiled CCP. This study provides a solid theoretical basis for the blocking and inhibition strategies of advanced glycation end-products in the processing of CCP, which is also a great significance for the production of green safety CCP and strengthening the safety of traditional Chinese medicine.

Maillard reaction is a non-enzymatic browning reaction which is ubiquitous in the food industry and processing of Chinese materia medica (CMM). Maillard reaction can not only change the color and aroma of CMM, extend the shelf life of CMM, but also produce new active substances in CMM. In addition, a small amount of toxic and harmful substances such as 5-hydroxymethylfurfural and advanced glycation end-products produced by Maillard reaction have been given increasingly attention. It is of great significance to control the quality of CMM by changing the reaction temperature, time, potential of hydrogen, adding inhibitors, and anti-oxidants to regulate Maillard reaction. This paper reviews the general situation of Maillard reaction research and its research progress on the quality and regulation of CMM, and provides a reference for further research on the regulation of Maillard reaction for the quality control of CMM.

Objective: To investigate the causes and influencing factors of 5-hydroxymethylfurfural (5-HMF) during the processing of Cervi Cornu Pantotrichum (CCP). Methods: HPLC was used to determine the content of 5-HMF in CCP with different processing methods and different parts. Moreover, the contents of total sugar, reducing sugar, amino acid, and Ca, Mg, Fe, and Cu in velvet antler were determined, and the effects of several factors on 5-HMF production during processing were discussed by comparing the contents of above mentioned substances in velvet antler with different processing methods. Results: The contents of 5-HMF of boiled CCP were significantly higher than that of freeze-dried CCP (P < 0.05) in same parts, indicating that high temperature intensified caramelization reaction and Maillard reaction to produce more 5-HMF in boiled CCP; The contents of 5-HMF of CCP with blood were significantly higher than that of CCP without blood (P < 0.05), CCP with blood was rich in total sugar, reducing sugar and amino acid and these substances can provide sufficient substrate to produce more 5-HMF; The content of 5-HMF in wax slices was significantly higher than other parts (P < 0.05), and rich content of total sugars, reducing sugars, amino acids, and differentially distributed mineral elements all contribute to the production of 5-HMF in wax slices. Conclusion: The production of 5-HMF in processing CCP is the result of the combined action of total sugar, reducing sugar, amino acid, and mineral elements at different temperatures.

OBJECTIVE The present study was aimed to investigate the role of Wnt/β-catenin sig-naling in spinal VGLUT2 regulation and neuropathic pain. METHODS To elucidate the association be-tween VGLUT2 and neuropathic pain,we determined the expression and distribution characteristics of VGLUT2 in mice subjected to spared nerve injury(SNI),and then observed the effects of two VGLUT2 targeting shRNAs on mechanical allodynia and glutamate release.The effects of Wnt/β-catenin signal-ing on VGLUT2 expression and pain behavior were investigated by using Wnt agonist,Wnt1,and Wnt/β-catenin pathway inhibitor XAV939 in SNI mice.RESULTS SNI surgery induced significant up-regula-tion of VGLUT2 on postoperative days 7,14,and 21.Double immunofluorescence labeling of VGLUT2 with NeuN,MAP2,Iba-1,or GFAP showed that VGLUT2 was mainly expressed in neurons in the dor-sal horn of the spinal cord after SNI(NeuN,MAP2).Intrathecal administration of VGLUT2 shRNAs be-fore or after SNI surgery significantly decreased mechanical allodynia and glutamate release. Mean-while,Wnt1/β-catenin signaling increased significantly after SNI surgery.Over-expression of β-catenin in PC12 cells increased VGLUT2 protein level,intrathecal administration of Wnt agonist or Wnt1 signifi-cantly increased VGLUT2 protein expression in spinal cord, while Wnt/β-catenin pathway inhibitor XAV939 decreased VGLUT2 expression in PC12 cells and spinal cord.Additionally,intrathecal admin-istration of XAV939 7 days after SNI significantly attenuated mechanical allodynia in mice, which was in accordance with down-regulation of VGLUT2 protein levels.VGLUT2 shRNAs significantly attenuat-ed Wnt agonist or Wnt1 induced mechanical allodynia. CONCLUSION Wnt1/β-catenin signaling path-way up-regu-lates the spinal VGLUT2 expression,and this regulation is involved in neuropathic pain behavior.

Schizophrenia, described as the worst disease affecting mankind, is a severe and disabling mental disorder. Schizophrenia is characterized by complicated symptoms and still lacks a diagnostic neuropathology, so developing schizophrenia animal models which have quantifiable measures tested in a similar fashion in both humans and animals will play a key role in new therapeutic approaches. According to the symptoms of cognitive impairment and emotional disorder, the N-methyl-d-aspartate (NMDA)-receptor antagonist MK-801 was applied to induce schizophrenia-like behavior in mice. Locomotor activity and prepulse inhibition (PPI) were selected as indices and the effect of clozapine was also investigated in this model. The results showed that compared with the normal group, MK-801-treated mice exhibited significantly increased locomotor activity and impaired PPI, and pre-exposure to clozapine could ameliorate the abnormality and make it back to normal level. These findings suggest that the model we established could be a useful tool for antipsychotic drug screening.
Animals ; Antipsychotic Agents ; pharmacology ; Clozapine ; pharmacology ; Disease Models, Animal ; Dizocilpine Maleate ; Inhibition (Psychology) ; Male ; Mice ; Motor Activity ; drug effects ; Receptors, N-Methyl-D-Aspartate ; antagonists & inhibitors ; Schizophrenia ; chemically induced ; physiopathology

The aim of this study was to evaluate the homing capabilities of hematopoietic stem/progenitor cells (HSPCs) derived from human placenta tissues (PT). Single cell suspension of human PT was prepared by mechanical method. The expression levels of homing-related adhesion molecules (HRAM) including CD11a, CD49d, CD44, CD49e, CD62L and CD54 on CD34(+) cells and the percentages of CD34(+) cells and their subpopulations in nucleated cells (NC) from fresh human PT, umbilical cord arterial blood (UCAB) and umbilical cord venous blood (UCVB) were detected by using flow cytometry. The results showed that the percentage of CD34(+) cells and CD34(+)CD38(-) cells in placenta were higher than those in UCAB and UCVB. There were no significant difference in percentage of HSPC between UCAB and UCVB. Placenta-derived CD34(+) cells strongly expressed CD11a, CD49d, CD44, CD49e and CD54, among which expression levels of CD49e and CD54 on placenta-derived CD34(+) cells were significantly higher than those on UCAB and UCVB-derived CD34(+) cells. While the percentage of CD34(+)CD62L(+) cells in placenta was only lower than that in UCVB. It is concluded that human placenta is rich in HSPC. Moreover, the expression levels of most HRAM in CD34(+) cells from PT are higher than those from UCAB and UCVB or are close to them. It suggested that HSPCs derived from PT might have stronger homing capabilities than those from UCB.
Antigens, CD34 ; biosynthesis ; Cell Adhesion Molecules ; biosynthesis ; Fetal Blood ; cytology ; Hematopoietic Stem Cells ; metabolism ; Humans ; Hyaluronan Receptors ; biosynthesis ; Integrin alpha5 ; biosynthesis ; Intercellular Adhesion Molecule-1 ; biosynthesis ; Placenta ; cytology

Heat shock protein 90 (HSP90) is a member of genetically conserved heat shock protein family. As an important molecular chaperone in eukaryotic cells, HSP90 plays a key regulatory role in maintaining cellular protein homeostasis. HSP90 clients encompass a wide range of proteins, thus HSP90 is involved in diverse biological process. With the deeper study, it is found that HSP90 takes an important part in the development and metastasis of cancer,and has become a promising target for the study of anticancer biology. We review the progress of HSP90 as molecular chaperone and its relationship with cancer.

Aim To establish a cell model which stably co-ex-press human kappa opioid receptor (hKOR) and enhanced green fluorescent protein ( EGFP) labeled catalytic domain of cAMP-dependent protein kinase A(PKAcat) fusion protein (PKAcat-EGFP) in Chinese hamster ovary(CHO) cells, laying the foun-dation for the high-throughput screening of hKOR drugs and drug molecular mechanisms in vitro. Methods Hygromycin B resist-ant hKOR recombinant plasmid [ pcDNA3.1/Hygro ( + ) -hKOR] was transfected into CHO cells stably expressing PKA-cat-EGFP by a lipofectin based method. Transfected cells were selected in culture medium containing hygromycin B. The posi-tive clones were selected by PKA redistribution assay. Z’ factor was used for evaluation and validation the reliability of the cell model. PKA redistribution assay and LANCE cAMP 384 Kit were used to test the function of the receptors in selected clone. Results CHO-PKAcat-EGFP/hKOR-13 cell model exhibited stable response in PKA redistribution assay and LANCE cAMP 384 Kit. Treated with 100 nmol·L-1U-50488 for 30 min, the average value of Z’ factor was 0.596, proving the reliability of the cell model. The hKOR expression in cell model remained stable after a few generations. Conclusion The CHO-PKAcat-EGFP/hKOR-13 cell model with stable co-expression of hKOR and PKAcat-EGFP has been successfully established.

The differences and the variations of chondroitin sulfate content in different parts of Cervi Cornu Pantotrichum(CCP) with different processing methods were investigated. The chondroitin sulfate from velvet was extracted by dilute alkali-concentrated salt method. Next， the chondroitin sulfate was digested by chondroitinase ABC.The contents of total chondroitin sulfate and chondroitin sulfate A， B and C in the samples were determined by high performance liquid chromatography(HPLC).The content of chondroitin sulfate in wax，powder，gauze，bone slices of CCP with freeze-drying processing is 14.13，11.99，1.74，0.32 g·kg⁻¹， respectively. The content of chondroitin sulfate in wax，powder，gauze，bone slices of CCP with boiling processing is 10.71，8.97，2.21，1.40 g·kg⁻¹， respectively. The content of chondroitin sulfate in wax，powder，gauze，bone slices of CCP without blood is 12.47，9.47，2.64，0.07 g·kg⁻¹， respectively. And the content of chondroitin sulfate in wax，powder，gauze，bone slices of CCP with blood is 8.22，4.39，0.87，0.28 g·kg⁻¹ respectively. The results indicated that the chondroitin sulfate content in different processing methods was significantly different.The content of chondroitin sulfate in CCP with freeze-drying is higher than that in CCP with boiling processing.The content of chondroitin sulfate in CCP without blood is higher than that in CCP with blood. The chondroitin sulfate content in differerent paris of the velvet with the same processing methods was arranged from high to low as： wax slices， powder， gauze slices， bone slices.
Animals ; Chondroitin Sulfates ; analysis ; Deer ; Horns ; chemistry

Objective To analyze the feasibility and efficacy of a deep convolutional neural network(DCNN)model based on chest CT images to evaluate bone mineral density(BMD).Methods A total of 1 048 health check subjects'2 096 central level images of lumbar 1 and 2 vertebral bodies were used for experiments and analysis in this retrospective study.According to the results of quanti-tative computed tomography(QCT)BMD measurement,the subjects were divided into three categories:normal,osteopenia,osteopo-rosis(OP).Herein,a DCNN segmentation model was constructed based on chest CT images[training set(n=1 096),tuning set(n=200),and test set(n=800)],the segmentation performance was evaluated using the Dice similarity coefficient(DSC)to com-pare the consistency with the manually sketched region of vertebral body.Then,the DCNN classification models 1(fusion feature construction of lumbar 1 and 2 vertebral bodies)and model 2(image feature construction of lumbar 1 alone)was developed based on the training set(n=530).Model performance was compared in a test set(n=418)by the receiver operating characteristic(ROC)curve analysis.Results When the number of images in the training set(n=300)was adopted,the DSC value was 0.950 in the test set.The results showed that the sensitivity,specificity and area under the curve(AUC)of model 1 and model 2 in diagno-sing osteopenia and OP were 0.716,0.960,0.952;0.941,0.948,0.980;0.638,0.954,0.940;0.843,0.959,0.978,respectively.The AUC value of normal model 1 was higher than that of model 2(0.990 vs 0.983,P=0.033),while there was no significant difference in AUC values between osteopenia and OP(P=0.210,0.546).Conclusion A DCNN may have the potential to evaluate bone mass based on chest CT images,which is expected to become an effective tool for OP screening.