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Wu YT, Du WH, Shi L, Liang Q, Zou XQ. Vasculoprotective Effects of Water Extracts of Black, Green and Dark Tea in Vitro. Nat Prod Commun 2017; 12:387-390. [PMID: 30549892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023] Open
Abstract
To investigate the preventive effects of tea on hyperglycemia and vascular complications of diabetes, we report the extraction and composition as well as the vasculoprotective effects of black tea extract (BTE), green tea extract (GTE), and dark tea extract (DTE). High Performance Liquid Chromatography (HPLC) and colorimetric methods were conducted to analyze for tea catechins, caffeine, polyphenols, amino acids and polysaccharides of BTE, GTE and DTE. The inhibitory effects of α-glucosidase, aldose reductase (AR), advanced glycation end-products (AGEs) and glucose uptake promotion effect in BTE, GTE and DTE were explored in vitro. Contents of six major catechin forms and total catechin as well as polyphenols are higher in GTE and DTE than BTE. BTE, GTE, and DTE showed the inhibitory effects of a-glucosidase, AR, and AGEs, but only DTE exhibited the glucose uptake promotion effect in HepG2 cells. The results suggest that regular consumption of tea can help prevent the progression of hyperglycemia and the vascular complications of diabetes.
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Shen Y, Tong M, Liang Q, Guo Y, Sun HQ, Zheng W, Ao L, Guo Z, She F. Epigenomics alternations and dynamic transcriptional changes in responses to 5-fluorouracil stimulation reveal mechanisms of acquired drug resistance of colorectal cancer cells. THE PHARMACOGENOMICS JOURNAL 2017; 18:23-28. [PMID: 28045128 PMCID: PMC5817391 DOI: 10.1038/tpj.2016.91] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 11/06/2016] [Accepted: 11/14/2016] [Indexed: 12/19/2022]
Abstract
A drug-induced resistant cancer cell is different from its parent cell in transcriptional response to drug treatment. The distinct transcriptional response pattern of a drug-induced resistant cancer cell to drug treatment might be introduced by acquired DNA methylation aberration in the cell exposing to sustained drug stimulation. In this study, we performed both transcriptional and DNA methylation profiles of the HCT-8 wild-type cells (HCT-8/WT) for human colorectal cancer (CRC) and the 5-fluorouracil (5-FU)-induced resistant cells (HCT-8/5-FU) after treatment with 5-FU for 0, 24 and 48 h. Integrated analysis of transcriptional and DNA methylation profiles showed that genes with promoter hypermethylation and concordant expression silencing in the HCT-8/5-FU cells are mainly involved in pathways of pyrimidine metabolism and drug metabolism-cytochrome P450. Transcriptional analysis confirmed that genes with transcriptional differences between a drug-induced resistant cell and its parent cell after drug treatment for a certain time, rather than their primary transcriptional differences, are more likely to be involved in drug resistance. Specifically, transcriptional differences between the drug-induced resistant cells and parental cells after drug treatment for 24 h were significantly consistent with the differentially expressed genes (termed as CRG5-FU) between the tissues of nonresponders and responders of CRCs to 5-FU-based therapy and the consistence increased after drug treatment for 48 h (binomial test, P-value=1.88E−06). This study reveals a major epigenetic mechanism inducing the HCT-8/WT cells to acquire resistance to 5-FU and suggests an appropriate time interval (24–48 h) of 5-FU exposure for identifying clinically relevant drug resistance signatures from drug-induced resistant cell models.
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Liu T, Liang Q, Hu A, Feng G, Wang N, Peng X, Baudouin C, Labbé A. Elimination of blinding trachoma in China. J Fr Ophtalmol 2016; 39:836-842. [PMID: 27865692 DOI: 10.1016/j.jfo.2016.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 09/28/2016] [Accepted: 10/04/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To present the change in the prevalence of blindness caused by trachoma between 1987 and 2006 by secondary data analysis based on two China National Sample Surveys on Disability (CNSSD). METHODS Secondary data analysis was performed on two China National Sample Surveys on Disability (CNSSD), which were national representative household surveys conducted in 1987 and 2006. The prevalence of blindness caused by trachoma was estimated by 10-year age group. In addition, the proportion of various causes of blindness was evaluated. The geographical distribution of blindness caused by trachoma both in 1987 and 2006 was analyzed in order to visualize the hot spots of blinding trachoma in China. RESULTS The prevalence of blindness caused by trachoma in China decreased from 51.5/100,000 in 1987 to 17.6/100,000 in 2006. In addition, the proportion of blindness attributed to trachoma also decreased from 10.1% (1987) to 0.9% (2006). Moreover, the prevalence of blindness caused by trachoma was over 200/100,000 in 2.2% of sampled counties in 2006 as compared to 8.6% in 1987. The hot spots of blinding trachoma were shown to be limited to underdeveloped mountain areas in Hubei and Guizhou provinces. CONCLUSION Although blinding trachoma is no longer the leading cause of blindness in China since the 2000's, the prevalence of trachoma should still be monitored in some underdeveloped mountain areas. Therefore, health organization must continue to fight against blinding trachoma in underdeveloped areas.
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Zheng YZ, Zhou Y, Liang Q, Chen DF, Guo R. Theoretical studies on the hydrogen-bonding interactions between luteolin and water: a DFT approach. J Mol Model 2016; 22:257. [PMID: 27709439 DOI: 10.1007/s00894-016-3128-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 09/19/2016] [Indexed: 11/25/2022]
Abstract
Flavonoids are among the most important bioactive compounds responsible for the medical properties of honey and propolis. Water is the solvent most commonly used to extract flavonoids from honey and propolis. Hydrogen-bonding interactions are of great importance in the extraction process. In this work, hydrogen-bonding interactions between a representative flavonoid, luteolin, and water were investigated by density functional theory (DFT) from a theoretical viewpoint. The following conclusions were drawn: first, the molecular structure of luteolin is non-planar. Second, nine optimized geometries for the luteolin-H2O complex were obtained. With the exception of the aromatic hydrogen atoms in the phenyl substituent, the other hydrogen and oxygen atoms formed hydrogen-bonds with H2O. Third, luteolin-H2O complexation is accompanied by charge rearrangement. The electron density and the second-order perturbation stabilization energy [E(2)] in the related anti-bonding orbital of the hydrogen-bond donors were increased, causing elongation and a red-shift of the X-H bond in X-H···Y. The stronger interaction makes the electron density and the E(2) increase more in the more stable geometries. The sum of the electron density is transferred from hydrogen-bond acceptors to donors. Fourth, the hydrogen-bonds in the luteolin-H2O complex are weak and basically electrostatic in nature. In addition, O-H···O hydrogen-bonds are stronger than C-H···O hydrogen-bonds in the luteolin-H2O complex.
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80
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Li YX, Chen XF, Li Y, Liang Q, Shi F, Dou MM, Ma LH. [Correlation of Agronomic Character of Panax notoginseng in Guangxi with Soil Physical and Chemical Properties]. ZHONG YAO CAI = ZHONGYAOCAI = JOURNAL OF CHINESE MEDICINAL MATERIALS 2016; 39:1982-1988. [PMID: 30207654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To study the effect of physicochemical characteristics of soil on Panax notoginseng agronomic character, in order to offer the theory for selecting an appropriate soil to cultivate Panax notoginseng, and to build the production bases. METHODS To test and analyze Panax notoginseng agronomic character, to analyze the form of layered soil particles, p H value and soil fertility. At the same time, the analysis of Panax notoginseng plant height, leaf number, the length of taproot, the width of taproot, stem diameter, the width of residual part of stem, rootlet number, root fresh and dry weight and drying rate were carried out. RESULTS Panax notoginseng agronomic character had a large difference. The length of roots, the width of roots and a large number of rootlets had a promoting effect on accumulating biological yield. Nevertheless, the numbers of branches had no obvious impact on accumulating biological yield. Most of soil texture were silty clay or light clay of silty clay. Physical clay and coarse silt could promote the growth of Panax notoginseng. Sand grain had significant effect on Panax notoginseng growth. A reasonable use of nitrogenous fertilizer had a prominent promoting effect on the width of the medicine’s root. In fact, the use of phosphorus potassium also had a great impact on Panax notoginseng growth. CONCLUSION Panax notoginseng should be planted on the light clay which are loose and can irrigate and drain conveniently and contains many silty. The heavy clay soil which are defective aeration and contain cosmid has a bad influence of the growth of Panax notoginseng. It will cause a decrease of the yield of medicinal materials. Using nitrogenous fertilizer aptly also is an effective way to improve the quality and yield of Panax notoginseng.
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81
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Tencer AH, Liang Q, Zhuang Z. Divergence in Ubiquitin Interaction and Catalysis among the Ubiquitin-Specific Protease Family Deubiquitinating Enzymes. Biochemistry 2016; 55:4708-19. [PMID: 27501351 DOI: 10.1021/acs.biochem.6b00033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Deubiquitinating enzymes (DUBs) are responsible for reversing mono- and polyubiquitination of proteins and play essential roles in numerous cellular processes. Close to 100 human DUBs have been identified and are classified into five families, with the ubiquitin-specific protease (USP) family being the largest (>50 members). The binding of ubiquitin (Ub) to USP is strikingly different from that observed for the DUBs in the ubiquitin C-terminal hydrolase (UCH) and ovarian tumor domain protease (OTU) families. We generated a panel of mutant ubiquitins and used them to probe the ubiquitin's interaction with a number of USPs. Our results revealed a remarkable divergence of USP-Ub interactions among the USP catalytic domains. Our double-mutant cycle analysis targeting the ubiquitin residues located in the tip, the central body, and the tail of ubiquitin also demonstrated different crosstalk among the USP-Ub interactions. This work uncovered intriguing divergence in the ubiquitin-binding mode in the USP family DUBs and raised the possibility of targeting the ubiquitin-binding hot spots on USPs for selective inhibition of USPs by small molecule antagonists.
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82
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Tong M, Zheng W, Li H, Li X, Ao L, Shen Y, Liang Q, Li J, Hong G, Yan H, Cai H, Li M, Guan Q, Guo Z. Multi-omics landscapes of colorectal cancer subtypes discriminated by an individualized prognostic signature for 5-fluorouracil-based chemotherapy. Oncogenesis 2016; 5:e242. [PMID: 27429074 PMCID: PMC5399173 DOI: 10.1038/oncsis.2016.51] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/27/2016] [Accepted: 06/17/2016] [Indexed: 12/11/2022] Open
Abstract
Until recently, few prognostic signatures for colorectal cancer (CRC) patients receiving 5-fluorouracil (5-FU)-based chemotherapy could be used in clinical practice. Here, using transcriptional profiles for a panel of cancer cell lines and three cohorts of CRC patients, we developed a prognostic signature based on within-sample relative expression orderings (REOs) of six gene pairs for stage II-III CRC patients receiving 5-FU-based chemotherapy. This REO-based signature had the unique advantage of being insensitive to experimental batch effects and free of the impractical data normalization requirement. After stratifying 184 CRC samples with multi-omics data from The Cancer Genome Atlas into two prognostic groups using the REO-based signature, we further revealed that patients with high recurrence risk were characterized by frequent gene copy number aberrations reducing 5-FU efficacy and DNA methylation aberrations inducing distinct transcriptional alternations to confer 5-FU resistance. In contrast, patients with low recurrence risk exhibited deficient mismatch repair and carried frequent gene mutations suppressing cell adhesion. These results reveal the multi-omics landscapes determining prognoses of stage II-III CRC patients receiving 5-FU-based chemotherapy.
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83
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Scherer G, Urban M, Hagedorn HW, Feng S, Kinser RD, Sarkar M, Liang Q, Roethig HJ. Determination of two mercapturic acids related to crotonaldehyde in human urine: influence of smoking. Hum Exp Toxicol 2016; 26:37-47. [PMID: 17334178 DOI: 10.1177/0960327107073829] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Crotonaldehyde, an αβ-unsaturated aldehyde, and a potent alkylating agent, is present in many foods and beverages, ambient air and tobacco smoke. A previous study indicated that two metabolites, 3-hydroxy-1- methylpropylmercapturic acid (HMPMA) and 2-carboxy1-1-methylethylmercapturic acid (CMEMA), were excreted in rat urine after subcutaneous injection of crotonaldehyde. Herein, we report the development of a method based on liquid chromatography with tandem mass spectrometry (LC-MS/MS) and deuterated analytes as internal standards, for the determination of HMPMA and CMEMA in human urine. The limits of quantification of the method were 92 and 104 ng/mL for HMPMA and CMEMA, respectively. The calibration curves for both compounds were linear up to 7500 ng/mL with R2 >0.99. It was found that cigarette smokers excreted about three to five-fold more HMPMA, and only slightly elevated amounts of CMEMA, in their urine compared to non-smokers. In smokers, we also found significant correlations between the urinary excretion levels of HMPMA (but not CMEMA) and several markers of exposure for smoking, including the daily cigarette consumption, carbon monoxide in exhaled breath, salivary cotinine, and nicotine plus five of its major metabolites in urine. Smoking cessation or switching from smoking conventional cigarettes to experimental cigarettes with lower crotonaldehyde delivery led to significant reductions of urinary HMPMA excretion, but not CMEMA excretion. Alcohol consumption did not influence either urinary HMPMA or CMEMA excretion. We conclude that HMPMA is a potentially useful biomarker for smoking-related exposure to crotonaldehyde.
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Liang Q, Shah P, Li S, Miyamoto C. SU-F-T-403: Impact of Dose Reduction for Simulation CT On Radiation Therapy Treatment Planning. Med Phys 2016. [DOI: 10.1118/1.4956588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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85
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Li S, Ali S, Harper K, Liang Q, Serratore D. SU-G-IeP3-02: Characteristics of In-Vivo MOSFET Dosimeters for Diagnostic X-Ray Low-Dose Measurements. Med Phys 2016. [DOI: 10.1118/1.4957052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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86
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Li S, Miyamoto C, Serratore D, Liang Q, Dziemianowicz E. SU-F-T-92: Clinical Benefit for Breast and Chest Wall Setup in Using a Breast Board. Med Phys 2016. [DOI: 10.1118/1.4956228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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87
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Yu J, Liang Q, Wang J, Wang K, Gao J, Zhang J, Zeng Y, Chiu PWY, Ng EKW, Sung JJY. REC8 functions as a tumor suppressor and is epigenetically downregulated in gastric cancer, especially in EBV-positive subtype. Oncogene 2016; 36:182-193. [PMID: 27212034 PMCID: PMC5241426 DOI: 10.1038/onc.2016.187] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 04/14/2016] [Accepted: 04/18/2016] [Indexed: 12/23/2022]
Abstract
REC8 meiotic recombination protein (REC8) was found to be preferentially methylated in gastric cancer (GC) using promoter methylation array. We aimed to elucidate the epigenetic alteration and biological function of REC8 in GC. REC8 was downregulated in 100% (3/3) of Epstein–Barr virus (EBV)-positive and 80% (8/10) of EBV-negative GC cell lines by promoter methylation, but the expression could be restored through demethylation treatment. Protein expression of REC8 was significantly lower in human primary gastric tumors than in adjacent non-tumor tissues. A negative correlation between methylation and mRNA expression of REC8 was observed in 223 gastric samples of The Cancer Genome Atlas study (r=−0.7018, P<0.001). The methylation level (%) of the REC8 promoter was significantly higher in EBV-positive gastric tumors than in EBV-negative gastric tumors, as shown by bisulfite genomic sequencing (77.6 (69.3–80.5) vs 51.4 (39.5–62.3), median (interquartile range); P<0.001); methylation levels in both subtypes of tumors were significantly higher than in normal stomach tissues (14.8 (4.2–24.0)) (both P<0.001). Multivariate analysis revealed that REC8 methylation was an independent factor for poor survival in GC patients (hazard ratio=1.68, P<0.05). REC8 expression significantly suppressed cell viability, clonogenicity and cell cycle progression; it induced apoptosis and inhibited migration of AGS-EBV (EBV-positive) and BGC823 (EBV-negative) GC cells, and it suppressed tumorigenicity in nude mice. In contrast, knockdown of REC8 in gastric epithelial immortalized GES-1 cells significantly increased cell viability, clonogenicity and migration ability. The tumor-suppressive effect of REC8 is mediated at least in part by the downregulation of genes involved in cell growth (G6PD, SLC2A1, NOL3, MCM2, SNAI1 and SNAI2), and the upregulation of apoptosis/migration inhibitors (GADD45G and LDHA) and tumor suppressors (PinX1, IGFBP3 and ETS2). In conclusion, REC8 is a novel tumor suppressor that is commonly downregulated by promoter methylation in GC, especially in the EBV-associated subtype. Promoter methylation of REC8 is an independent risk factor for the shortened survival of GC patients.
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Shen J, Tsoi H, Liang Q, Chu ESH, Liu D, Yu ACS, Chan TF, Li X, Sung JJY, Wong VWS, Yu J. Oncogenic mutations and dysregulated pathways in obesity-associated hepatocellular carcinoma. Oncogene 2016; 35:6271-6280. [PMID: 27132506 PMCID: PMC5153568 DOI: 10.1038/onc.2016.162] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 04/01/2016] [Accepted: 04/03/2016] [Indexed: 02/07/2023]
Abstract
Epidemiological studies showed that obesity and its related non-alcoholic fatty liver disease (NAFLD) promote hepatocellular carcinoma (HCC) development. We aimed to uncover the genetic alterations of NAFLD-HCC using whole-exome sequencing. We compared HCC development in genetically obese mice and dietary obese mice with wild-type lean mice fed a normal chow after treatment with diethylnitrosamine. HCC tumor and adjacent normal samples from obese and lean mice were then subjected to whole-exome sequencing. Functional and mechanistic importance of the identified mutations in Carboxyl ester lipase (Cel) gene and Harvey rat sarcoma virus oncogene 1 (Hras) was further elucidated. We demonstrated significantly higher incidences of HCC in both genetic and dietary obese mice with NAFLD development as compared with lean mice without NAFLD. The mutational signatures of NAFLD-HCC and lean HCC were distinct, with <3% overlapped. Eight metabolic or oncogenic pathways were found to be significantly enriched by mutated genes in NAFLD-HCC, but only two of these pathways were dysregulated by mutations in lean HCC. In particular, Cel was mutated significantly more frequently in NAFLD-HCC than in lean HCC. The multiple-site mutations in Cel are loss-of-function mutations, with effects similar to Cel knock-down. Mutant Cel caused accumulation of cholesteryl ester in liver cells, which led to induction of endoplasmic reticulum stress and consequently activated the IRE1α/c-Jun N-terminal kinase (JNK)/c-Jun/activating protein-1 (AP-1) signaling cascade to promote liver cell growth. In addition, single-site mutations in Hras at codon 61 were found in NAFLD-HCC but none in lean HCC. The gain-of-function mutations in Hras (Q61R and Q61K) significantly promoted liver cell growth through activating the mitogen-activated protein kinase (MAPK) and phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/3-phosphoinositide-dependent protein kinase-1 (PDK1)/Akt pathways. In conclusion, we have identified mutation signature and pathways in NAFLD-associated HCC. Mutations in Cel and Hras have important roles in NAFLD-associated hepatocellular carcinogenesis.
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Liang Q, Chen XF, Li S, Zhang J, Peng SM. [Effect of Transplanting Time on Growth,Dry Matter Accumulation and Distribution,and Yield of Ligusticum chuanxiong]. ZHONG YAO CAI = ZHONGYAOCAI = JOURNAL OF CHINESE MEDICINAL MATERIALS 2016; 39:699-703. [PMID: 30132307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To study the effect of transplanting time on growth, dry matter accumulation and distribution,and yield of Ligusticum chuanxiong,in order to provide theoretical and practical basis for the choice of cultivation methods. METHODS Ligusticum chuanxiong which planted in Pengshan were used as materials, and rearched in the field plot experiment. By the single factor randomized block design, the effects on growth development,dry matter accumulation and distribution of different periods of Ligusticum chuanxiong were analyzed. RESULTS Transplanting time has an important influence on the development of Ligusticum chuanxiong after lodging, and the lodging time was positively related to transplanting time; dry matter translocated to the underground part in January of the second year, and the dry matter translocated to the aerial parts in February, the dry matter secondary translocated to the underground part during March and April. CONCLUSION Transplanting time affects the growth of Ligusticum chuanxiong,and affects the accumulation and distribution of every dry matter during the process of growth. Ligusticum chuanxiong transplant on August 31,and distribute more manure to improve the growth of aerial parts in the early stages,and spread additional manure to improve the growth of root stock at second year in shoot growth period,which can make a good harvest.
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Yang Z, Cai X, Xu A, Xu F, Liang Q. Bone marrow stromal cell transplantation through tail vein injection promotes angiogenesis and vascular endothelial growth factor expression in cerebral infarct area in rats. Cytotherapy 2016; 17:1200-12. [PMID: 26276003 DOI: 10.1016/j.jcyt.2015.06.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 06/08/2015] [Accepted: 06/08/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND AIMS This study sought to identify correlations between vascular endothelial growth factor (VEGF) expression after tail-vein injection of rat-derived bone marrow stromal cells (BMSCs) and neurogenesis and angiogenesis in cerebral infarct of rats. METHODS Rats with intraluminal middle cerebral artery occlusion were injected in a tail vein with Hoechst-labeled BMSCs. Functional recovery from cerebral infarction was observed through the use of a locomotion score. The brains of injected rats were sliced, and Hoechst-labeled BMSCs in the infarct and peri-infarct areas and subventricular zone (SVZ) were detected with the use of fluorescence microscopy. Ki-67 (as a cell proliferation marker) and VEGF expression were determined by means of immunohistochemistry. Neurofibril formation and angiogenesis were examined by means of Bielschowsky staining. RESULTS Within 1 to 2 weeks after BMSC injection, rats showed significantly improved locomotion scores compared with rats without BMSC injection (P < 0.01). Viable BMSCs were found in the peri-infarct area. The numbers of Ki-67-positive and VEGF-positive cells in the peri-infarct area and SVZ of injected rats were significantly increased compared with the control group (P < 0.01). Numerous new vessels, neurofibrils and anastomosed vasculatures were present in the infarct area. These neurofibrils mainly surrounded the neovasculatures. CONCLUSIONS These results indicate that BMSC-transplantation in rats through tail vein injection can increase neurogenesis, perhaps as the result of VEGF-mediated and/or Ki-67-mediated angiogenesis.
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Dong HW, Xu ST, Yu YJ, Liang Q. [Root shape changes of impacted upper central incisor before and after orthodontic traction]. SHANGHAI KOU QIANG YI XUE = SHANGHAI JOURNAL OF STOMATOLOGY 2016; 25:72-76. [PMID: 27063313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE Changes of root shape of impacted upper central incisor before and after orthodontic traction were observed with dental cone-beam CT(CBCT), the timing for traction of impacted upper central incisor was investigated. METHODS Ten impacted maxillary central incisors were diagnosed via panoramic radiograph. CBCT images were taken preoperatively for accurate localization. Following combined treatment of dental surgery and orthodontic traction, ten impacted maxillary central incisors were guided out and aligned well. Final treatment results and the root development status were evaluated via CBCT. RESULTS Ten impacted maxillary central incisors were tracted to normal position. CBCT images before and after treatment showed that the root of impacted incisors with completed root apex had no change in shape, while the root of impacted incisors with uncompleted root apex developed continually with obviously improved shape and length. CONCLUSIONS Optimistic results can be achieved if the traction of impacted upper central incisor is carried out before root development completed.
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Wang X, Wu Y, Wu Q, Qian Y, Yue W, Liang Q. Ultra-High Performance Liquid Chromatography—Tandem Mass Spectrometry for Rapid Analysis of Seven Phenolic Compounds of Sparganii Rhizoma. ACTA CHROMATOGR 2015. [DOI: 10.1556/achrom.27.2015.4.12] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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93
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Jiang K, Zhang J, Liang Q. Self-Assembly of Asymmetrically Interacting ABC Star Triblock Copolymer Melts. J Phys Chem B 2015; 119:14551-62. [PMID: 26492084 DOI: 10.1021/acs.jpcb.5b08187] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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94
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He H, Yao K, Nie W, Wang Z, Liang Q, Shu C, Dardik A. Modified Petticoat Technique with Pre-placement of a Distal Bare Stent Improves Early Aortic Remodeling after Complicated Acute Stanford Type B Aortic Dissection. Eur J Vasc Endovasc Surg 2015; 50:450-9. [DOI: 10.1016/j.ejvs.2015.04.035] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Accepted: 04/21/2015] [Indexed: 10/23/2022]
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Liang Q, Chen XF, Li Y, Zhang J, Meng J, Peng SM. [Effects of Chemical Fertilizers and Organic Fertilizer on Yield of Ligusticum chuanxiong Rhizome]. ZHONG YAO CAI = ZHONGYAOCAI = JOURNAL OF CHINESE MEDICINAL MATERIALS 2015; 38:2015-2020. [PMID: 27254909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To study the effects of different N, P, K and organic fertilizer (OF) on yield of Ligusticum chuanxiong rhizome, in order to provide the theoretical foundation for the establishment of standardization cultivation techniques. METHODS The field plot experiments used Ligusticum chuanxiong rhizome which planted in Pengshan as material, and were studied by the four factors and five levels with quadratic regression rotation-orthogonal combination design. According to the data obtained, a function model which could predict the fertilization and yield of Ligusticum chuanxiong rhizome accurately was established. RESULTS The model analysis showed that the yields of Ligusticum chuanxiong rhizome were significantly influenced by the N, P, K and OF applications. Among these factors, the order of increase rates by the fertilizers was K > OF > N > P; The effect of interaction between N and K, N and OF, K and OF on the yield of Ligusticum chuanxiong rhizome were significantly different. High levels of N and P, N and organic fertilizer, K and organic fertilizer were conducive to improve the yield of Ligusticum chuanxiong rhizome. The results showed that the optimal fertilizer application rates of N was 148.20 - 172.28 kg/hm2, P was 511.92 - 599.40 kg/hm2, K was 249.70 - 282.37 kg/hm2, and OF was 940.00 - 1 104.00 kg/hm2. CONCLUSION N, P, K and OF obviously affect the yield of Ligusticum chuanxiong rhizome. K and OF can significantly increase the yield of Ligusticum chuanxiong rhizome. Thus it is suggested that properly high mount of K and OF and appropriate increasing N are two favorable factors for cultivating Ligusticum chuanxiong.
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He H, Yao K, Nie W, Wang Z, Liang Q, Shu C, Dardik A. Modified Petticoat Technique with Pre-placement of a Distal Bare Stent Improves Early Aortic Remodeling After Complicated Acute Stanford Type B Aortic Dissection. J Vasc Surg 2015. [DOI: 10.1016/j.jvs.2015.08.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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97
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Xing R, Li L, Chen L, Gao Z, Wang H, Li W, Cui J, Tian G, Liang Q, Yu J, Sung JJ, Luo G, Gao H, Xu X, Yang H, Wang J, Zhang X, Wang JM, Huang J, Yu Y, Wang J, Lu Y. Copy number variations of HLA-I and activation of NKp30 pathway determine the sensitivity of gastric cancer cells to the cytotoxicity of natural killer cells. Oncogene 2015; 35:2584-91. [PMID: 26364607 DOI: 10.1038/onc.2015.324] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 05/19/2015] [Accepted: 07/24/2015] [Indexed: 02/06/2023]
Abstract
Nude mice are important in vivo model for characterization of cell malignancy behavior; however, many cancer cells fail to form tumors in it. Understanding this defective mechanism may provide novel insights into tumorigenesis and how tumor cells escape innate immunity. Whole-genome sequencing was conducted on two gastric cancer (GC) cells, BGC823 and AGS, which do and do not form tumors in nude mice, to identify their genomic differences relevant to natural killer (NK) cells. We found that the tumorigenic capacity of human GC cell lines was dependent on the recruitment and activation of NK cells in xenograft tumors. We used whole-genome sequence (WGS) on GC cell lines to identify potential genes controlling susceptibility to NK-mediated killing. The tumorigenic cell line BGC823 expressed high levels of HLA-I because of copy gain and was resistant to NK cell killing. In contrast, another cell line AGS expressing low levels of HLA-I with activated NKp30/MAPK/IL-12 (interleukin-12) or IL-2 (interleukin-2) pathway was susceptible to NK lysis. Treatment of tumor bearing mice with systemic administration of IL-12 in combination with intratumor injection of anti-HLA-I antibody significantly increased NK cell recruitment into xenograft tumors, which became sensitive to NK killing, resulting in reduced tumor progression. In human GC specimens, decreased HLA-I expression and increased NK cells surrounding tumor cells were correlated with decreased metastasis potential and better prognosis of patients. Our results provide a mechanistic basis for GC cells to escape NK lysis and a promising prospect of NK immunotherapy for GC cells.
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98
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Ji T, Shen F, Liu Z, Yin L, Shen J, Liang Q, Luo YX. Comparative proteomic analysis reveals mite (Varroa destructor) resistance-related proteins in Eastern honeybees (Apis cerana). GENETICS AND MOLECULAR RESEARCH 2015; 14:10103-18. [PMID: 26345948 DOI: 10.4238/2015.august.21.18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The mite (Varroa destructor) has become the greatest threat to apiculture worldwide. As the original host of the mite, Apis cerana can effectively resist the mite. An increased understanding of the resistance mechanisms of Eastern honeybees against V. destructor may help researchers to protect other species against these parasites. In this study, the proteomes of 4 Apis cerana colonies were analyzed using an isobaric tag for relative and absolute quantitation technology. We determined the differences in gene and protein expression between susceptible and resistant colonies that were either unchallenged or challenged by V. destructor. The results showed that a total of 1532 proteins were identified. Gene Ontology enrichment analysis suggested that the transcription factors and basic metabolic and respiratory processes were efficient and feasible factors controlling this resistance, and 12 differentially expressed proteins were identified in Venn analysis. The results were validated by quantitative polymerase chain reaction. This study may provide insight into the genetic mechanisms underlying the resistance of honeybee to mites.
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99
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Feng B, Wang Y, Liang Q, Andersen L, Szeto G. Prevalence of work-related musculoskeletal symptoms of neck and upper limb among dentists in China. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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100
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Wang Y, Guo L, Zhang X, Zhang G, Liu Z, Liang Q. Exercise capacity differences between healthy adults and minimally invasive mitral valve surgery patients. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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