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Biomedical subjects

Yue Gao

Publications and source records attributed to Yue Gao.

At least 19 recordsLinked to original sources

Integrated Transcriptomic and Proteomic Analysis Elucidates the Mechanisms of Huperzine A Injection Against Cerebral Ischemia/Reperfusion Injury.

BACKGROUND: After recanalization in acute ischemic stroke, cerebral ischemia/reperfusion injury (CI/RI) drives a cascade of pathophysiological events that worsen clinical outcomes, yet effective therapeutic options remain limited. Given the neuroprotective potential of Huperzine A (HupA), the efficacy of HupA injection (HAI, a major clinical formulation of HupA) against CI/RI and its underlying molecular basis warrant investigation. METHODS: In a mouse model of CI/RI, neurological performance, locomotor ability, cerebral infarction, histopathological alterations, and apoptotic neurons were jointly used to assess the anti-CI/RI effect of HAI at two different doses. An integrated transcriptomic and proteomic strategy was adopted to decipher the key anti-CI/RI mechanisms of HAI and then validated experimentally. RESULTS: Compared with vehicle&#x2011;treated CI/RI mice, HAI intervention significantly alleviated neurobehavioral deficits, decreased infarct size, mitigated histopathological damage, and suppressed neuronal apoptosis (P < 0.01). Both separate and combined transcriptomic and proteomic analyses highlighted that the complement and coagulation cascades, together with inflammation, were strongly correlated with HAI's beneficial action in preventing CI/RI. Indeed, HAI treatment effectively normalized the dysregulated mRNA and protein levels of pivotal targets within the complement and coagulation cascades, including C3, C5, C9, CFB, MASP2, F7, F10, F12, and SERPINE1, in the damaged cortical tissues of CI/RI mice (P < 0.05). Moreover, this intervention markedly attenuated the abnormally elevated expression of multiple inflammatory mediators, including TLR2, TLR4, TNF-&#x3b1;, IL-1&#x3b2;, IL-6, CCL2, CCL5, CXCL1, ICAM1, S100A9, LCN2, MMP8, and MMP9, at both the mRNA and protein levels (P < 0.01). CONCLUSION: Collectively, our data suggest that HAI may confer efficacy against CI/RI by modulating the complement and coagulation cascades and orchestrating the inflammatory response. Although further investigation is warranted, these preliminary findings provide a foundation for accelerating the clinical translation of HAI as a novel neuroprotectant against CI/RI in ischemic stroke.

Animals↗

Chromosome-level genome assembly of hawthorn spider mite, Amphitetranychus viennensis (Acari: Tetranychidae).

The hawthorn spider mite, Amphitetranychus viennensis, is a major pest of orchards and ornamentals in the Palaearctic region, with adaptability and acaricide resistance. The lack of high-quality genomic resources limits understanding of its detoxification mechanisms and the development of RNAi-based pest control strategies. In this study, we utilized Illumina, Pacific Biosciences (PacBio), and Hi-C sequencing technologies to assemble a chromosome-level reference genome of A. viennensis. The assembled genome spans 141.96&#x2009;Mb, with a contig N50 of 1.35&#x2009;Mb. BUSCO analysis confirmed a high level of completeness, covering 91.6% of annotated genes. The assembly includes 50.97&#x2009;Mb of repetitive sequences, representing 35.93% of the genome, and annotates 13,968 protein-coding genes. Using Hi-C sequencing, we anchored 47 contigs to three chromosomes, accounting for 97.27% of the estimated nuclear genome and achieving a contig N50 of 45.83&#x2009;Mb. This high-quality genome assembly provides a valuable foundation for evolutionary and genomic research on spider mites, while also serving as a genetic resource to inform molecular control strategies and support sustainable pest management.

Animals↗

Plasma Proteomic Profiling Reveals ITGA2B as A Key Regulator of Heart Health in High-altitude Settlers.

Myocardial injury is a common disease in the plateau, especially in the lowlanders who have migrated to the plateau, in which the pathogenesis is not well understood. Here, we established a cohort of lowlanders comprising individuals from both low-altitude and high-altitude areas and conducted plasma proteomic profiling. Proteomic data showed that there was a significant shift in energy metabolism and inflammatory response in individuals with myocardial abnormalities at high altitude. Notably, integrin alpha-&#x2161;b (ITGA2B) emerged as a potential key player in this context. Functional studies demonstrated that ITGA2B upregulated the transcription and secretion of interleukin-6 (IL-6) through the integrin-linked kinase (ILK)/nuclear factor-&#x3ba;B (NF-&#x3ba;B) signaling axis under hypoxic conditions. Moreover, ITGA2B disrupted mitochondrial structure and function, increased glycolytic capacity, and aggravated energy reprogramming from oxidative phosphorylation to glycolysis. Leveraging the therapeutic potential of traditional Chinese medicine in cardiac diseases, we discovered that tanshinone &#x2161;A (Tan&#x2161;A) effectively alleviated the myocardial injury caused by the abnormally elevated expression of ITGA2B and hypobaric hypoxia exposure in mice, thus providing a novel candidate therapeutic strategy for the prevention and treatment of high-altitude myocardial injury.

Animals↗

Characterization of metabolites and cytochrome P450 isoforms involved in the microsomal metabolism of aconitine.

Aconitine, a major Aconitum alkaloid, is well known for its high toxicity that induces severe arrhythmias leading to death. The current study investigated the metabolism of aconitine and the effects of selective cytochrome P450 (CYP) inhibitors on the metabolism of aconitine in rat liver microsomes. The metabolites were separated and assayed by liquid chromatography-ion trap mass spectrometry (LC/MS(n)) and further identified by comparison of their mass spectra and chromatographic behaviors with reference substances. Various selective inhibitors of CYP were used to identify the isoforms of CYP, that involved in the metabolism of aconitine. A total of at least six metabolites were found and characterized in rat liver microsomal incubations. Result showed that the inhibitor of CYP 3A had an inhibitory effect on aconitine metabolism in a concentration-dependant manner, the inhibitor of CYP1A1/2 had a modest inhibitory effect, whereas inhibitors of CYP2B1/2, 2D and 2E1 had no obvious inhibitory effects on aconitine metabolism. Aconitine might be metabolized by CYP 3A and CYP1A1/2 isoforms in rat liver microsome.

Aconitine↗

Studies on the degradation of blue gel pen dyes by ion-pairing high performance liquid chromatography and electrospray tandem mass spectrometry.

Ion-pairing high performance liquid chromatography (IP-HPLC) was utilized to monitor the composition changes of blue gel pen ink entries on paper stored in different light conditions and natural environment. The chromatographic conditions were optimized by comparing the separation efficiencies of the blue gel pen inks using a series of ion-pairing reagents, including ammonium carbonate, ammonium acetate, triethylamine acetate, tributylamine acetate, tetrabutylammonium bromide and dihexylammonium acetate. It has been found that tributylamine acetate was a suitable ion-pairing reagent for separation of the inks on the common C18 column. The analysis results of the ink entries on paper in different aging conditions showed that the tendency of composition change in natural aging condition was similar with those in fluorescent light and UV light conditions, respectively. One main component dye of the blue gel pen ink, Acid Blue 9, and its degradation products were identified by ion-pairing high performance liquid chromatography coupled with electrospray tandem mass spectrometry. The results showed that the main degradation products originated from the Acid Blue 9. It gave a reasonable explanation for the changing rules of the relative content of the dyes in the blue gel pen ink. The results obtained can provide scientific evidences for dating of the blue gel pen ink entries on documents.

Chromatography, High Pressure Liquid↗

Proteomic analysis effects of ginsenoside Rg1 on human umbilical vein endothelial cells stimulated by tumor necrosis factor-alpha.

Ginsenoside Rg1 (derived from ginseng root) has been found to have many vasoprotective activities. The present study was undertaken to examine effect of ginsenoside Rg1 on the secretion of nitric oxide (NO) in human umbilical vein endothelial cells (HUVECs) stimulated with or without tumor necrosis factor-alpha (TNF-alpha). We showed here that ginsenoside Rg1 can increase the basal and TNF-alpha-attenuated NO production in a dose-dependent manner. As little is known regarding the vascular molecular mechanism of ginsenoside Rg1 on HUVECs and proteomic technique has more advantages in molecular identification, we attempted to use proteomic analysis to explain vascular molecular mechanism of ginsenoside Rg1 on HUVECs. Proteomic analytical result showed that 21 protein spots were changed in TNF-alpha stimulated HUVECs, including 9 up-regulated spots, 11 down-regulated spots, and 1 spot detected in TNF-alpha stimulated group only. The expression level of proteins such as MEKK3, phosphoglycerate mutase was increased, and nitric-oxide synthase, mineralocorticoid receptor were decreased in TNF-alpha stimulated HUVECs, while ginsenoside Rg1 could prevent this change or reverse to some degree. This study suggested that NO production increased via ginsenoside Rg1 played an important role in the protective effect on TNF-alpha stimulated HUVECs and was helpful to deeply understand the active mechanism of ginsenoside Rg1 to HUVECs at the molecular level.

Blotting, Western↗

[Molecular cloning, tissue distribution and expression in engineered cells of human orphan receptor GPR81].

The gpr81 was amplified by polymerase chain reaction (PCR) using human fetus kidney cDNA and whole blood genome DNA as template, respectively. The expression profile of gpr81 in human fetus was analyzed by RT-PCR and the result indicated GPR81 mRNA was most abundant in fetus liver and heart. In addition, the deduced amino acid of GPR81 was compared with other related molecules by Clustal w/x software, and a molecular phylogenetic tree was constructed with Treeview software. It was showed that GPR81 had the highest homology with nicotinic acid receptor in amino acids. After sequence identification, gpr81 was inserted into the plasmid pcDNA3. 1 (-)/his-mycA and then transfected into Chinese hamster ovary cell (CHO-K1). With the selection of G418, an engineered cell line which could stably express gpr81 was obtained by the indication of RT-PCR and Western-blot detection. The establishment of the cell line will serve as means for further study of GPR81.

Amino Acid Sequence↗

Ginsenoside Rg1 inhibits proliferation of vascular smooth muscle cells stimulated by tumor necrosis factor-alpha.

AIM: To investigate the proliferation of vascular smooth muscle cells (VSMC) affected by ginsenoside Rg1 and further explore the molecular mechanism of ginsenoside Rg1 using proteomics. METHODS: The proliferation of VSMC was measured by MTS assay kit and flow cytometry. Proteomic alterations were analyzed using two-dimensional electrophoresis and peptide mass fingerprinting. Differential proteins found in proteomics were confirmed by RT-PCR. RESULTS: The proliferation of VSMC was enhanced significantly after tumor necrosis factor-alpha (TNF-alpha) treatment, and ginsenoside Rg1 treatment inhibited proliferation in a dose-dependent manner. Proteomic analysis showed 24 protein spots were changed, including 17 spots that were increased and 7 spots that were decreased. Ginsenoside Rg1 could restore the expression levels of these proteins, at least partly, to basic levels of untreated cells. The expression of G-protein coupled receptor kinase, protein kinase C (PKC)-zeta, N-ras protein were decreased, while cycle related protein p21 was increased by ginsenoside Rg1 in TNF-alpha treated VSMC. CONCLUSION: PKC-zeta and p21 pathway might be the mechanism for inhibitory effects of ginsenoside Rg1 on proliferation of VSMC.

Animals↗

Effects of four Si-Wu-Tang's constituents and their combination on irradiated mice.

Effects of four Si-Wu-Tang (SWT)'s constituents, fructose (Fru), paeoniflorin (Pae), ferulic acid (FA), tetramethyl pyrazine (TP), and their combination on irradiated mice as model of anaemia were investigated, with the purpose of further understanding the relationship between SWT's constituents and activities. Similarly to SWT, oral administration of Fru, Pae, FA, TP and their combination, to some extent, all showed effects of increasing the number of peripheral leukocyte and increasing four types of progenitor cells in bone marrow, including colony-forming unit-granulocyte-macrophage (CFU-GM), colony-forming unit-mature erythroid (CFU-E), colony-forming unit-immature erythroid (BFU-E) and colony-forming unit-multipotential (CFU-mix). Pae and FA showed significant body weight reducing effect, which were largely abolished when they were combined with Fru and TP. The SWT, Fru and combination significantly increased the thymus index while Pae significantly decreased it. Both SWT and TP significantly increased the spleen index but the combination did not. The results suggested that multiple constituents contribute to the promoting effect of SWT on hematopoiesis. Although being a very common compound in plants, the Fru has a special contribution to SWT's effect, which cannot be neglected. It may be an important active constituent that is responsible for SWT's promoting effect on hematopoiesis and immunity. Another suggestion is that when being combined, some effect of one constituent, sometimes is unexpected side effect, may be abolished by other. This may reflect the advantage of multiple constituent characteristics possessed by most TCMs.

Animals↗

[Effects of Siwu decoction on bone marrow protein expression of blood deficiency mice induced by cyclophosphamide].

OBJECTIVE: To study the effects of Siwu decoction on protein expression of blood deficiency mice induced by cyclophosphamide (CIX) and discuss the possible molecular mechanism on blood enriching function of Siwu decoction. METHOD: Blood deficiency mice were established by injecting ip with 250 mg x kg(-1) CTX. Proteomic technologies were applied to identify the different protein. RESULT: Siwu decoction could restore the changes of 12 up-regulated and 3 down-regulated proteins in bone marrow of blood deficiency mice induced by cyclosphosphamide. CONCLUSION: Siwu decoction could effect expression of proteins which functions including apoptosis, proliferation and differentiation of the haematopoietic stem/progenitor cell. The regulation in the molecular level might be the mechanism of stimulating hematopoiesis in bone marrow fo siwu decocetion.

Actin Depolymerizing Factors↗

[Effects of fufangdenshen tablets on human atherosclerotic plasma protein using proteomic technique].

OBJECTIVE: To research the effects of fufangdenshen tablets on atherosclerotic plasma protein using proteomic technique and further explore its potential molecular mechanism to cure atherosclerosis. METHOD: The plasma of normal, atherosclerosis and cured group were collected, and the albumin in plasma was removed. Proteomic protocol involved of 2-DE, image analysis and spectrometry detection was used to detect regulated plasma protein by fufangdenshen tablets. RESULT: 3 decreased expressed and 6 higher protein in atherosclerotic plasma could be recovered by fufangdenshen tablets. The levels of fibrinogen, Granzyme C and immunoglobulin were decreased by fufangdenshen tablets. CONCLUSION: The levels of fibrinogen, Granzyme C in atherosclerotic plasma could be decreased by fufangdenshen tablets. The effects of fufangdenshen tablets on atherosclerosis included that: inhibition of adhesion of monocyte, inhibition of proliferation and migration of VSMC, and weakening of inflammation.

Aged↗

[Measurement and amendment of complex-permittivities of distilled water and NaCl solution].

In this experiment, the complex-permittivities at 2 450 MHz of distilled water and various NaCl solutions were measured separately, and acquired data were analyzed and amended. The system develooped on the basis of this experiment is of great significance to studying the measurement of complex-permittivities of high-loss biologic tissues by perturbational method.

Chemistry Techniques, Analytical↗

[Hematopoietic effect of siwu decoction in the mice with blood deficiency induced by compound method of bleeding, starved feeding and exhausting].

OBJECTIVE: To observe the hematopoietic effects of Siwu decoction in the mice with blood deficiency induced by compound method of bleeding, starved feeding and exhausting and lay experimental basis under the blood-enriching function of Siwu decoction in different models of blood deficiency. METHOD: The animal model of blood deficiency was established by a combination of starved feeding with routine food at the rate of 75 g(-1) kg(-1) body weight per day, swimming 20 minutes and removing 0.4 mL blood every other day in each mouse. The amount of peripheral blood cells, the cell cycle and the apoptosis of bone marrow cells and the percentage of CD34+ in bone marrow cells were detected by microcellcounter and flow cytometry. RESULT: The amount of red blood cells in model mice was significantly increased by Siwu decoction at different dosages, from 4.6 x 10(12) to 6.5, 7.1 and 7.0 x 10(12) respectively. At the 15th day, the percentages of bone marrow cells at S stage in the treated group were 14.34%, 14.03% and 13.58% which were significantly higher than that in model group without treatment of Siwu Decoction. CONCLUSION: Siwu decoction significantly improve the hematopoiesis in the mice with blood deficiency induced by compound method mentioned above.

Angelica sinensis↗

Microencapsulated hepatocytes and islets as in vivo bioartificial liver support system.

AIM: To confirm the xenotransplantation of microencapsulated hepatocytes and islets as a temporary bioartificial liver support system for mice with acute liver failure (ALF). METHODS: Mice were rendered ALF by a single intra-peritoneal injection of D-galactosamine (D-gal) and their tail blood was sampled to examine differences in blood ALT, albumin (ALB), total bilirubin (TB) and glucose (GLU) between 4 experimental groups. Rat hepatocytes and islets were collected and microencapsulated referring to both Sun's and Fritschy's methods. Mice were grouped into control group (CG), free hepatocyte group (FHG), microencapsulated hepatocyte group (MHG) and microencapsulated hepatocyte plus islet group (HIG). Tissue samples were subjected to microscopic and electron microscopic (EM) examinations. RESULTS: The highest survival was observed in HIG, surprisingly at 100%(16/16), while the lowest was in CG at 12.5%(2/16), with inter-group statistical difference P<0.05. ALT levels revealed no statistical difference between groups but the ALB level of HIG descended by the slightest margin (q=(0.54, 0.24, 1.33), P<0.05) at the time when it reached the lowest point in all groups. TB of HIG returned to normal reference range (NRR) statistically sooner than that of others after a fierce elevation. No statistical inter-group difference was observed in GLU levels. Fusion between hepatocytes and beta cells was demonstrated giving rise to theoretical assumptions. CONCLUSION: Hepatocytes to be microencapsulated together with islets should be a preferred in vivo hepatic functional supporting system, which can dramatically prolong survival and improve living status.

Animals↗

Role of individually staged nutritional support in the management of severe acute pancreatitis.

BACKGROUND: Severe acute pancreatitis (SAP) as a common acute abdomen due to complicated causes is characterized by lots of morbidities, difficult treatment, and high mortality. This study was designed to investigate the role of individually staged nutritional support (ISNS) in the treatment of SAP. METHODS: One hundred patients with SAP admitted to our hospital from January 1997 to October 2002 were randomly divided into total parenteral nutrition group (TPN group, 50 patients) and individually staged nutrition group (individualized group, 50 patients), between which the therapeutic outcome and the incidence of complications were carefully analyzed. RESULTS: Compared with the TPN group, the individualized group had less complications (62 vs 94 patients) including incubation related complications (2% vs 16%), superinfections (8% vs 30%), hepatic functional insufficiency (4% vs 24%) and intra-peritoneal infections (4% vs 12%), in addition to a sooner restoring of oral nutrition (18.5 vs 24.8 days, P<0.05), a shorter hospital stay (24.5 vs 30.2 days) and a lower hospital cost (4.1 vs 5.8 10,000 yuan, P<0.05). CONCLUSION: ISNS, which provides SAP patients with sufficient energy and nutrients according to their true pathological status, is an ideal nutrition planning with lowered incidence of complications, shortened hospital stay and lightened financial burden.

Acute Disease↗

[Epidemic investigation on 3 to 6 years children's bruxism in Shanghai.].

PURPOSE: The present investigation analyzed the states of children bruxism in Shanghai, aiming for early diagnosis and early treatments. METHODS: The investigation was conducted through questionnaising 779 3-to-6-years-old children's parents. The data were processed using Chi square test. RESULTS: (1)The prevalence of children bruxism in Shanghai was about 38.4%; (2)151 males (40.6%) and 148 females (36.4%) had bruxism, which indicated no statistic difference in two genders(X2=1.47, P>0.05);(3)There seemed to exist hereditary difference between children with or without bruxism(X2=102.98, P<0.01). CONCLUSION: There is a high bruxism prevalence among children aged from 3 to 6 years in Shanghai, which should be concerned about by the healthy care workers in order to make early diagnosis and treatment.

Bruxism↗