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The role of glycoproteins in nasopharyngeal carcinoma pathogenesis
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作者 Liudmila Matskova Elvira Grigorieva 《广西医科大学学报》 CAS 2024年第9期1261-1272,共12页
Nasopharyngeal carcinoma(NPC)is a malignant tumor arising from the nasopharyngeal epithelium.It consists of undifferentiated squamous cells in the nasopharynx.This type of epithelial cell neoplasm is globally distribu... Nasopharyngeal carcinoma(NPC)is a malignant tumor arising from the nasopharyngeal epithelium.It consists of undifferentiated squamous cells in the nasopharynx.This type of epithelial cell neoplasm is globally distributed,with the highest prevalence observed in certain regions of the world.It has been known since ancient times.The incidence of NPC is steadily decreasing as data on the molecular factors involved in the pathogenesis of NPC accumulate.Glycoproteins are characterized by polymers of saccharides attached to the amino acid sequences of proteins during the process of glycosylation.They are present in all animal cells and are especially abundant on the surface of tumor cells.Alterations in expression of cellular glycoproteins have recently attracted attention as a key component of neoplastic progression.Tumor-associated glycoproteins may serve as a hallmark of cancer cells and thus represent novel diagnostic and even therapeutic targets.Interest in the role of glycoproteins in cancer in general and specifically in NPC pathology has steadily increased over the past fifty years,reaching over thousands and two hundred publications in the last five years,respectively.Here,data on a specific class of proteins,glycoproteins,involved in tumorigenesis of NPCs are summarized,with a focus on a few of the best-studied ones.Relevant studies performed mainly in the last five years were retrieved and collected through the PubMed system. 展开更多
关键词 nasopharyngeal carcinoma GLYCOPROTEIN PATHOGENESIS
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Fragmentation stability and retention time-shift obtained by LC-MS/MS to distinguish sialylated N-glycan linkage isomers in therapeutic glycoproteins
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作者 Chi Soo Park Minju Kang +7 位作者 Ahyeon Kim Chulmin Moon Mirae Kim Jieun Kim Subin Yang Leeseul Jang Ji Yeon Jang Ha Hyung Kim 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2023年第3期305-314,共10页
Sialylated N-glycan isomers withα2-3 orα2-6 linkage(s)have distinctive roles in glycoproteins,but are difficult to distinguish.Wild-type(WT)and glycoengineered(mutant)therapeutic glycoproteins,cytotoxic T lymphocyte... Sialylated N-glycan isomers withα2-3 orα2-6 linkage(s)have distinctive roles in glycoproteins,but are difficult to distinguish.Wild-type(WT)and glycoengineered(mutant)therapeutic glycoproteins,cytotoxic T lymphocyte-associated antigen-4-immunoglobulin(CTLA4-Ig),were produced in Chinese hamster ovary cell lines;however,their linkage isomers have not been reported.In this study,N-glycans of CTLA4-Igs were released,labeled with procainamide,and analyzed by liquid chromatography-tandem mass spectrometry(MS/MS)to identify and quantify sialylated N-glycan linkage isomers.The linkage isomers were distinguished by comparison of 1)intensity of the N-acetylglucosamine ion to the sialic acid ion(Ln/Nn)using different fragmentation stability in MS/MS spectra and 2)retention time-shift for a selective m/z value in the extracted ion chromatogram.Each isomer was distinctively identified,and each quantity(>0.1%)was obtained relative to the total N-glycans(100%)for all observed ionization states.Twenty sialylated N-glycan isomers with onlyα2-3 linkage(s)in WT were identified,and each isomer's sum of quantities was 50.4%.Furthermore,39 sialylated N-glycan isomers(58.8%)in mono-(3 N-glycans;0.9%),bi-(18;48.3%),tri-(14;8.9%),and tetra-(4;0.7%)antennary structures of mutant were obtained,which comprised mono-(15 N-glycans;25.4%),di-(15;28.4%),tri-(8;4.8%),and tetra-(1;0.2%)sialylation,respectively,with onlyα2-3(10 N-glycans;4.8%),bothα2-3 andα2-6(14;18.4%),and onlyα2-6(15;35.6%)linkage(s).These results are consistent with those forα2-3 neuraminidase-treated N-glycans.This study generated a novel plot of Ln/Nn versus retention time to distinguish sialylated N-glycan linkage isomers in glycoprotein. 展开更多
关键词 Therapeutic glycoprotein SIALYLATION Linkage isomer LC-MS/MS
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Acrosome reaction: relevance of zona pellucida glycoproteins 被引量:9
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作者 Satish K Gupta Beena Bhandari 《Asian Journal of Andrology》 SCIE CAS CSCD 2011年第1期97-105,共9页
During mammalian fertilisation, the zona pellucida (ZP) matrix surrounding the oocyte is responsible for the binding of the spermatozoa to the oocyte and induction of the acrosome reaction (AR) in the ZP-bound spe... During mammalian fertilisation, the zona pellucida (ZP) matrix surrounding the oocyte is responsible for the binding of the spermatozoa to the oocyte and induction of the acrosome reaction (AR) in the ZP-bound spermatozoon. The AR is crucial for the penetration of the ZP matrix by spermatozoa. The ZP matrix in mice is composed of three glycoproteins designated ZP1, ZP2 and ZP3, whereas in humans, it is composed of four (ZP1, ZP2, ZP3 and ZP4). ZP3 acts as the putative primary sperm receptor and is responsible for AR induction in mice, whereas in humans (in addition to ZP3), ZP1 and ZP4 also induce the AR. The ability of ZP3 to induce the AR resides in its C-terminal fragment. O-linked glycans are critical for the murine ZP3-mediated AR. However, N-linked glycans of human ZP1, ZP3 and ZP4 have important roles in the induction of the AR. Studies with pharmacological inhibitors showed that the ZP3-induced AR involves the activation of the Gi-coupled receptor pathway, whereas ZP1- and ZP4-mediated ARs are independent of this pathway. The ZP3-induced AR involves the activation of T-type voltage-operated calcium channels (VOCCs), whereas ZP1- and ZP4-induced ARs involve both T- and L-type VOCCs. To conclude, in mice, ZP3 is primarily responsible for the binding of capacitated spermatozoa to the ZP matrix and induction of the AR, whereas in humans (in addition to ZP3), ZP1 and ZP4 also participate in these stages of fertilisation. 展开更多
关键词 acrosome reaction FERTILISATION OOCYTE signalling pathways SPERMATOZOA zona pellucida glycoproteins
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Glycoproteins and glycoproteomics in pancreatic cancer 被引量:3
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作者 Sheng Pan Teresa A Brentnall Ru Chen 《World Journal of Gastroenterology》 SCIE CAS 2016年第42期9288-9299,共12页
Aberrations in protein glycosylation and polysaccharides play a pivotal role in pancreatic tumorigenesis, influencing cancer progression, metastasis, immunoresponse and chemoresistance. Abnormal expression in sugar mo... Aberrations in protein glycosylation and polysaccharides play a pivotal role in pancreatic tumorigenesis, influencing cancer progression, metastasis, immunoresponse and chemoresistance. Abnormal expression in sugar moieties can impact the function of various glycoproteins, including mucins, surface receptors, adhesive proteins, proteoglycans, as well as their effectors and binding ligands, resulting in an increase in pancreatic cancer invasiveness and a cancerfavored microenvironment. Recent advance in glycoproteomics, glycomics and other chemical biology techniques have been employed to better understand the complex mechanism of glycosylation events and how they orchestrate molecular activities in genomics, proteomics and metabolomics implicated in pancreatic adenocarcinoma. A variety of strategies have been demonstrated targeting protein glycosylation and polysaccharides for diagnostic and therapeutic development. 展开更多
关键词 glycoproteins GLYCOSYLATION PROTEOMICS GLYCOPROTEOMICS Pancreatic cancer Pancreatic ductal adenocarcinoma
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Effect of Xiaoyu Zhixue Tablet (消瘀止血片) on Expression ofPlatelet Membrane Glycoproteins in Patients withHemorrhagic Thrombopathy 被引量:5
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作者 沈霖 沈迪 +4 位作者 高兰 刘仲萍 杨艳萍 谢晶 周丕琪 《Chinese Journal of Integrated Traditional and Western Medicine》 2004年第3期170-174,共5页
Objective: To observe the effect of Xiaoyu Zhixue tablet (消瘀止血片,XYZXT) on the expression of platelet membrane glycoproteins in patients with hemorrhagic thrombopathy, and to explore its possible mechanism. Method... Objective: To observe the effect of Xiaoyu Zhixue tablet (消瘀止血片,XYZXT) on the expression of platelet membrane glycoproteins in patients with hemorrhagic thrombopathy, and to explore its possible mechanism. Methods: The total of 148 patients with hemorrhagic thrombopathy were randomly divided into two groups, the traditional Chinese medicicne (TCM) group (n=98) treated with XYZXT and the Western medicine (WM) group (n=50) treated with adrenosin, vitamins C, K and P, both for 6 months. The therapeutic effect and the recovery rate of platelet aggregation in the two groups were observed. And platelet membrane glycoprotein (GP) Ⅰb/Ⅸ, GPⅡb/Ⅲa complexes, GPⅠb, GPⅡb, GP Ⅲa and P-selectin were analyzed by flow cytometry in both groups before and after treatment and also in 34 normal healthy subjects. Results: The total effective rate of hemostasis was 89. 8% in TCM group and 54. 0% in the WM group (x2=45.83, P<0.01), and the recovery rate of platelet aggregation was 72.4% and 4.0% respectively (x2=62.06, P<0.01). The fluorescence intensity of GP Ⅰ b/Ⅸ, GPⅡb/Ⅲa complexes, GPⅠb, GPⅢa and P-selectin were lower in both groups before treatment than those in the healthy subjects. Expression of above-mentioned marks was elevated in TCM group after 6 months' therapy, which was insignificantly different as compared with the healthy subjects (P>0.05) and higher than those in the WM group (P<0.05). Conclusion: One of the mechanisms in treating hemorrhagic thrombopathy with XYZXT is that it could regulate the expression of GP Ⅰb/Ⅸ, GPⅡ b/Ⅲa complexes, GPⅠb, GPⅢa and P-selectin at the level of receptor protein. 展开更多
关键词 hemorrhagic thrombopathy Xiaoyu Zhixue tablet platelet membrane glycoproteins
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Pregnancy-associated glycoproteins as a potential marker for diagnosis of earlypregnancy in goats: A scoping reviewing 被引量:1
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作者 Nandini Sharma Shiva Pratap Singh +1 位作者 Alok Bharadwaj Ramachandran Natesan 《Asian pacific Journal of Reproduction》 2020年第6期255-260,共6页
Early diagnosis of pregnancy plays an important role to minimize reproductive losses in farm animals.There are several methods for pregnancy diagnosis like profiling of reproductive hormones(such as progesterone and e... Early diagnosis of pregnancy plays an important role to minimize reproductive losses in farm animals.There are several methods for pregnancy diagnosis like profiling of reproductive hormones(such as progesterone and estrone sulfate),but sometimes they provide false-positive results.Embryo specific pregnancy markers,which delineate the presence and viability of the embryo,are considered as perfect for pregnancy determination.Pregnancy-associated glycoproteins are distinguished as the best indicator for the determination of early pregnancy,fetal number,and birth weight of kids.Pregnancy-associated glycoproteins are structurally correlated to aspartic proteinase and are communicated in the external epithelial cell layer of the placenta.They have been found to share about half amino acid sequence identity with pepsinogen,pepsin,cathepsin D and E.Dislike different individuals from aspartic proteinase family,numerous pregnancy-associated glycoproteins appear to be latent compound as a result of amino acid substitutions in and around the catalytic site.This review is to discuss the scope and prospects of pregnancy-associated glycoproteins as a pregnancy marker in farm animals,more specifically in goats. 展开更多
关键词 Pregnancy-associated glycoproteins Early pregnancy Farm animals PLACENTA Goats
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Clinical impact of hepatitis B and C virus envelope glycoproteins
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作者 Hélène Jeulin Aurélie Velay +1 位作者 John Murray Evelyne Schvoerer 《World Journal of Gastroenterology》 SCIE CAS 2013年第5期654-664,共11页
Chronic infection by either hepatitis B virus(HBV)or hepatitis C virus(HCV)share epidemiological characteristics with risks for development of severe complications such as liver cirrhosis and hepatocellular carcinoma.... Chronic infection by either hepatitis B virus(HBV)or hepatitis C virus(HCV)share epidemiological characteristics with risks for development of severe complications such as liver cirrhosis and hepatocellular carcinoma.HBV and HCV also share a high genetic variability. Among highly variable regions,viral genes encoding surface proteins(hepatitis B surface antigen,E1/E2 HCV glycoproteins)play key roles in the stimulation of the host-related immune response and viral entry into hepatocytes.Specific segments of HBV envelope proteins(preS1,"a"determinant)are crucial in the entry process into permissive cells.HCV entry is a complex multistep process involving multiple cell cofactors (glycosaminoglycans,low density lipoprotein receptor, SR-B1,CD81,claudin-1,occludin,EGFR,EphA2)in the interaction with HCV E1/E2 envelope glycoproteins.In vitro both viruses can be controlled by antibody-me-diated neutralization targeting viral envelope,also essential in preventing HBV infection in vivo as observed through successful vaccination using HBs antigen.But preventive vaccination and/or therapeutic pressure can influence HBV and HCV variability.For HBV,the patterns of antiviral drug resistance in chronic hepatitis are complex and the original pol/S gene overlap has to be taken into account.Treatment-induced HBV mutations in pol could indeed generate S mutants with subsequent modified antigenicity or increased cancer induction.Variability of HBV and HCV envelope proteins combining high exposure to selective pressures and crucial functional roles require investigation in the context of diagnostic,vaccination and treatment tools.In this editorial a synthesis is performed of HBV and HCV envelope properties at the entry step and as antigenic proteins,and the subsequent clinical impact. 展开更多
关键词 HEPATITIS B HEPATITIS C VIRAL ENVELOPE glycoproteins Clinical OUTCOME
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Impact of Borate on Structure of Antifreeze Glycoproteins
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作者 Feng-qin Long Tan Jin +1 位作者 Ke-li Han Wei Zhuang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2021年第6期659-669,I0001,I0007-I0012,共18页
Antifreeze glycoproteins(AFGPs)facilitate the survival of various organisms in the polar region by preventing internal ice accumulation via an adsorption-inhibition mechanism.Inhibition of AFGP antifreeze activity by ... Antifreeze glycoproteins(AFGPs)facilitate the survival of various organisms in the polar region by preventing internal ice accumulation via an adsorption-inhibition mechanism.Inhibition of AFGP antifreeze activity by the borate buffers has been widely acknowledged as the direct experimental evidence supporting the hydroxyl,rather than methyl,binding mechanism.On the other hand,perturbation of borate binding on the AFGP configuration,which might have considerable influence on the binding efficiency of not only the hydroxyl but also the methyl groups,has rarely been quantitatively examined.Herein we studied,using molecular dynamics simulations,the perturbation on the configuration of a solvated AFGP8 protein induced by the binding of one single borate anion.Near the freezing point,this binding not only makes the disaccharide groups adjacent to the borate-binding disaccharide close to each other but also affects the entire AFGP8 conformation.The structural changes induced by the binding of borate on different disaccharide sidechains exhibit clear site-specificities and the effect of borate binding on the structural changes is significantly reduced at higher temperatures.Our study is valuable for further understanding the relationship between the structure and antifreeze activity of these antifreeze glycoproteins. 展开更多
关键词 Antifreeze glycoproteins Borate anions Molecular dynamics Clustering analysis
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ANALYSIS OF THE N-GLYCOSYLATION OF THESERUM GLYCOPROTEINS DEFINED BY CON A,PHA-E, RCA1 AND WGA IN CHINESE PATIENTS WITH GASTROINTESTINAL DISEASES
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作者 张积仁 陈英 +1 位作者 戴秀兰 汪森明 《Chinese Medical Sciences Journal》 CAS CSCD 1996年第1期36-40,共5页
Glycoproteins from tumor cells isolated by Con A, PHAE and RCAI, were coupled to horse radish peroxidase and then used as reporters to evaluate the oligosaccharides change on serum glycoproteins in digestive tract dis... Glycoproteins from tumor cells isolated by Con A, PHAE and RCAI, were coupled to horse radish peroxidase and then used as reporters to evaluate the oligosaccharides change on serum glycoproteins in digestive tract diseases and individual healthy persons. A value 2 standard deviation above the mean of the healthy person group was considered positive. The results indicated that the positive rates of the oligosaccharides bound with Con A, PHA-E and RCAI were 51 % (61/119) . 70. 6% (84/119) , and 76. 4% (91/119) in patients with gastric cancer: 53. 3% (16/30),46. 7% ( 14/30) and 66. 7% (20/30) in esophageal cancers; 28. 5% (15/49), 49. 0% (24/49) and .46. 9% (23/49) in colorectal cancer; 78. 1% (25/ 32) ,81. 3% (26/32) and 31. 3% (10/32) in gallbladder tumors; 60. 4% (29/48), 54. 1% (26/48) and 39. 5% (19/48) in hepatocellular cancer. The positive rates among the patients with benign diseases were also found to be 12. 7% (16/126), 15. 5% (20/126) and 26. 2% (33/126). However, the expression of the oligosaccharide moieties recognized by WGA on the glycoprotein bound with Con A, was significantly lower in the serum of patients with tumors than in those with benign disease and in healthy individuals (P<0. 01 , P<0. 01). 展开更多
关键词 OLIGOSACCHARIDES gastrointestinal neoplasms glycoproteins LECTINS
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N-glycans released from glycoproteins using a commercial kit and comprehensively analyzed with a hypothetical database
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作者 Xue Sun Lei Tao +5 位作者 Lin Yi Yilan Ouyang Naiyu Xu Duxin Li Robert J.Linhardt Zhenqing Zhang 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2017年第2期87-94,共8页
The glycosylation of proteins is responsible for their structural and functional roles in many cellular activities.This work describes a strategy that combines an efficient release, labeling and liquid chromatography... The glycosylation of proteins is responsible for their structural and functional roles in many cellular activities.This work describes a strategy that combines an efficient release, labeling and liquid chromatography–mass spectral analysis with the use of a comprehensive database to analyze N-glycans. The analytical method described relies on a recently commercialized kit in which quick deglycosylation is followed by rapid labeling and cleanup of labeled glycans. This greatly improves the separation, mass spectrometry(MS) analysis and fluorescence detection of N-glycans. A hypothetical database, constructed using Glyc Resoft, provides all compositional possibilities of N-glycans based on the common sugar residues found in N-glycans. In the initial version this database contains &gt; 8,700 N-glycans, and is compatible with MS instrument software and expandable. N-glycans from four different well-studied glycoproteins were analyzed by this strategy. The results provided much more accurate and comprehensive data than that had been previously reported. This strategy was then used to analyze the N-glycans present on the membrane glycoproteins of gastric carcinoma cells with different degrees of differentiation. Accurate and comprehensive N-glycan data from those cells was obtained efficiently and their differences were compared corresponding to their differentiation states. Thus, the novel strategy developed greatly improves accuracy, efficiency and comprehensiveness of N-glycan analysis. 展开更多
关键词 N-glycan Hypothetical database glycoproteins Gastric carcinoma cells Glycomics
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Understanding the Glycoproteins Release from Alginate-Barium Capsules in Physiologic Enviroments
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作者 Edgar Perez Herrero Eva M. Martin del Valle Miguel A. Galán 《Advances in Chemical Engineering and Science》 2011年第4期256-270,共15页
The authors carried out a steady and unsteady mass transfer studies to simulate both the release of proteins in physiologic environments and proteins transport through a tissue or organ from polymeric capsules by usin... The authors carried out a steady and unsteady mass transfer studies to simulate both the release of proteins in physiologic environments and proteins transport through a tissue or organ from polymeric capsules by using a substance, the rhodamine B isothiocyanate dextran (RBID) that mimics the behaviour of glycoproteins such as vascular endothelial growth factor (VEFG). These studies highlighted the importance of electrostatic interactions between alginate and proteins in the release processes. Thereby, this fact has opened new perspectives in order to use these kind of capsules in protein recognition processes. The electrostatic interactions between alginate and RBID allow pH-dependent controlled release systems that simulate the behaviour of glycoproteins. 展开更多
关键词 Controlled RELEASE Systems Proteins glycoproteins Growth Factors Mass Transfer Unsteady Steady
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Purifi cation, characterization and hypoglycemic activity of glycoproteins obtained from pea (Pisum sativum L.) 被引量:10
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作者 Gaoyixin Qin Wu Xu +2 位作者 Junping Liu Liyan Zhao Guitang Chen 《Food Science and Human Wellness》 SCIE 2021年第3期297-307,共11页
This study aimed to isolate and characterize the structures of glycoproteins from peas and determine their hypoglycemic activity.The crude pea glycoproteins(PGP)were extracted by hot water and purified by diethylamino... This study aimed to isolate and characterize the structures of glycoproteins from peas and determine their hypoglycemic activity.The crude pea glycoproteins(PGP)were extracted by hot water and purified by diethylaminoethyl(DEAE)-Sepharose chromatography and Sephadex G-100 size-exclusion chromatography in sequence.Then three main fractions were obtained,namely PGP1,PGP2 and PGP3,with molecular weights of 897615,846740 and 1194692 Da,respectively.The physical and chemical properties of the three fractions were evaluated and compared by Fourier transform infrared spectroscopy(FT-IR),nuclear magnetic resonance(NMR),scanning electron microscope(SEM),high performance liquid chromatography(HPLC)and other analytical techniques.The fraction PGP2 with the highest hypoglycemic activity,was screened using the Caco-2 monolayer cell model.It can inhibit the uptake of glucose in the small intestine,as well as the activities of maltase and sucrase.After simulated gastrointestinal digestion,PGP2 signifi cantly enhanced the inhibitory effect of α-glucosidase,and slightly reduced the inhibitory ability ofα-amylase.In summary,PGP2 possessed strong hypoglycemic activity after digestion.These results indicated that PGP2 has the potential to be developed into a functional food or natural medicine for the treatment of type 2 diabetes mellitus. 展开更多
关键词 Pea(Pisum sativum L.) GLYCOPROTEIN Structural characterization Hypoglycemic activity Simulated gastrointestinal digestion
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Quantitative proteomic analysis for high-throughput screening of differential glycoproteins in hepatocellular carcinoma serum 被引量:3
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作者 Hua-Jun Gao Ya-Jing Chen +5 位作者 Duo Zuo Ming-Ming Xiao Ying Li Hua Guo Ning Zhang Rui-Bing Chen 《Cancer Biology & Medicine》 SCIE CAS CSCD 2015年第3期246-254,共9页
Objective: Hepatocellular carcinoma (HCC) is a leading cause of cancer-related deaths. Novel serum biomarkers are required to increase the sensitivity and specificity of serum screening for early HCC diagnosis. Thi... Objective: Hepatocellular carcinoma (HCC) is a leading cause of cancer-related deaths. Novel serum biomarkers are required to increase the sensitivity and specificity of serum screening for early HCC diagnosis. This study employed a quantitative proteomic strategy to analyze the differential expression of serum glycoproteins between HCC and normal control serum samples. Methods: Lectin affinity chromatography (LAC) was used to enrich glycoproteins from the serum samples. Quantitative mass spectrometric analysis combined with stable isotope dimethyl labeling and 2D liquid chromatography (LC) separations were performed to examine the differential levels of the detected proteins between HCC and control serum samples. Western blot was used to analyze the differential expression levels of the three serum proteins. Results: A total of 2,280 protein groups were identified in the serum samples from HCC patients by using the 2D LC-MS/MS method. Up to 36 proteins were up-regulated in the HCC serum, whereas 19 proteins were down-regulated. Three differential glycoproteins, namely, fibrinogen gamma chain (FGG), FOS-like antigen 2 (FOSL2), and a-l, 6-mannosylglycoprotein 6-^-N-acetylglucosaminyltransferase B (MGATSB) were validated by Western blot. All these three proteins were up-regulated in the HCC serum samples. Conclusion: A quantitative glycoproteomic method was established and proven useful to determine potential novel biomarkers for HCC. 展开更多
关键词 GLYCOPROTEIN hepatocellular carcinoma (HCC) mass spectrometry PROTEOMICS SERUM
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Screening of Extraction Methods for Glycoproteins from Jellyfish (Rhopilema esculentum) Oral-Arms by High Performance Liquid Chromatography 被引量:1
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作者 REN Guoyan LI Bafang +5 位作者 ZHAO Xue ZHUANG Yongliang YAN Mingyan HOU Hu ZHANG Xiukun CHEN Li 《Journal of Ocean University of China》 SCIE CAS 2009年第1期83-88,共6页
In order to select an optimum extraction method for the target glycoprotein (TGP) from jellyfish (Rhopilema esculentum) oral-arms, a high performance liquid chromatography (HPLC)-assay for the determination of t... In order to select an optimum extraction method for the target glycoprotein (TGP) from jellyfish (Rhopilema esculentum) oral-arms, a high performance liquid chromatography (HPLC)-assay for the determination of the TGP was developed Purified target glycoprotein was taken as a standard glycoprotein. The results showed that the calibration curves for peak area plotted against concentration for TGP were linear (r= 0.9984, y=4.5895x+47.601) over concentrations ranging from 50 to 400mgL^-1. The mean extraction recovery was 97.84% (CV2.60%). The fractions containing TGP were isolated from jellyfish (R esculentum) oral-arms by four extraction methods: 1) water extraction (WE), 2) phosphate buffer solution (PBS) extraction (PE), 3) ultrasound-assisted water extraction (UA-WE), 4) ultrasound-assisted P/3S extraction (UA-PE). The lyophilized extract was dissolved in Milli-Q water and analyzed directly on a short TSK-GEL G4000PWXL (7.8 mm×300 ram) column. Our results indicated that the UA-PE method was the optimum extraction method selected by HPLC. 展开更多
关键词 HPLC GLYCOPROTEIN JELLYFISH extraction method
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Biomarkers for neuromyelitis optica:a visual analysis of emerging research trends 被引量:3
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作者 Xiangjun Li Jiandong Zhang +4 位作者 Siqi Zhang Shengling Shi Yi’an Lu Ying Leng Chunyan Li 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第12期2735-2749,共15页
Neuromyelitis optica is an inflammatory demyelinating disease of the central nervous system that differs from multiple sclerosis.Over the past 20 years,the search for biomarke rs for neuromyelitis optica has been ongo... Neuromyelitis optica is an inflammatory demyelinating disease of the central nervous system that differs from multiple sclerosis.Over the past 20 years,the search for biomarke rs for neuromyelitis optica has been ongoing.Here,we used a bibliometric approach to analyze the main research focus in the field of biomarkers for neuromyelitis optica.Research in this area is consistently increasing,with China and the United States leading the way on the number of studies conducted.The Mayo Clinic is a highly reputable institution in the United States,and was identified as the most authoritative institution in this field.Furthermore,Professor Wingerchuk from the Mayo Clinic was the most authoritative expe rt in this field.Keyword analysis revealed that the terms "neuro myelitis optica"(261 times), "multiple sclerosis"(220 times), "neuromyelitis optica spectrum disorder"(132 times), "aquaporin4"(99 times),and "optical neuritis"(87 times) were the most frequently used keywords in literature related to this field.Comprehensive analysis of the classical literature showed that the majority of publications provide conclusive research evidence supporting the use of aquaporin-4-IgG and neuromyelitis optica-IgG to effectively diagnose and differentiate neuromyelitis optica from multiple sclerosis.Furthermore,aquaporin-4-IgG has emerged as a highly specific diagnostic biomarker for neuromyelitis optica spectrum disorder.Myelin oligodendrocyte glycoprotein-IgG is a diagnostic biomarke r for myelin oligodendrocyte glycoprotein antibody-associated disease.Recent biomarkers for neuromyelitis optica in clude cerebrospinal fluid immunological biomarkers such as glial fibrillary acidic protein,serum astrocyte damage biomarkers like FAM19A5,serum albumin,and gammaaminobutyric acid.The latest prospective clinical trials are exploring the potential of these biomarkers.Preliminary results indicate that glial fibrillary acidic protein is emerging as a promising candidate biomarker for neuromyelitis optica spectrum disorder.The ultimate goal of future research is to identify non-invasive biomarkers with high sensitivity,specificity,and safety for the accurate diagnosis of neuro myelitis optica. 展开更多
关键词 AQUAPORIN-4 AUTOANTIBODY multiple sclerosis myelin oligodendrocyte glycoprotein antibody-associated disease neuromyelitis optica neuromyelitis optica spectrum disorder optical coherence tomography
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Specifically Binding of L-ficolin to N-glycans of HCV Envelope Glycoproteins E1 and E2 Leads to Complement Activation 被引量:8
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作者 Jun Liu Mohammed A.M. Ali +9 位作者 Yinghua Shi Yinglan Zhao Fenglin Luo Jin Yu Tian Xiang Jie Tang Dongqing Li Quan Hu Wenzhe Ho Xiaolian Zhang 《Cellular & Molecular Immunology》 SCIE CAS CSCD 2009年第4期235-244,共10页
L-ficolin, one of lectin families, is a recently identified complement factor that initiates lectin pathway of complement. Little is known about its role in viral hepatitis. In the present study, we found that L-ficol... L-ficolin, one of lectin families, is a recently identified complement factor that initiates lectin pathway of complement. Little is known about its role in viral hepatitis. In the present study, we found that L-ficolin in serum from 103 patients with hepatitis C virus (HCV), were significantly higher than that in 150 healthy controls. We further found that L-ficolin expressions were significantly increased in vitro study by HCV JFH-1 infected human hepatocyte cell line Huh7.5.1. Investigation of the mechanisms of the L-ficolin action on HCV demonstrated that L-ficolin protein could recognize and bind to envelope glycoproteins E1 and E2 of HCV, activating the lectin complement pathway-mediated cytolytic activity in HCV-infected hepatocyte. This interaction between L-ficolin and HCV E1 and E2 glycoproteins was attributed to the N-glycans of E1 and E2. These findings provide new insights into the biological functions of L-ficolin in clinically important hepatic viral diseases. 展开更多
关键词 L-FICOLIN hepatitis C virus envelope glycoproteins COMPLEMENT viral hepatitis
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Polydopamine-mediated immobilization of phenylboronic acid on magnetic microspheres for selective enrichment of glycoproteins and glycopeptides 被引量:2
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作者 Jiangnan Zheng Zian Lin +1 位作者 Lan Zhang Huanghao Yang 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第6期1056-1064,共9页
In this work, we demonstrate for the first time, a method to synthesize phenylboronic acid-Fe304@polydopamine (Fe3O4@ PDA-PBA) magnetic microspheres via the combination of mussel-inspired polydopamine coating and cl... In this work, we demonstrate for the first time, a method to synthesize phenylboronic acid-Fe304@polydopamine (Fe3O4@ PDA-PBA) magnetic microspheres via the combination of mussel-inspired polydopamine coating and click chemistry. Uniform-size and core-shell structured Fe3O4@PDA-PBA magnetic microspheres with a core diameter of -240 nm and a shell thickness of -13 nm were obtained as identified by the characterization of the morphology, structure and composition of the synthesized microspheres. We evaluated the selectivity and binding capacity of the Fe3O4@PDA-PBA magnetic microsphcres by using standard glycoproteins (ovalbumin, immunoglobulin G and catalase) and nonglycoproteins (human serum albumin, bovine hemoglobin, myoglobin, lysozyme, and ribonuclease A) as model proteins. Adsorption experiments, SDS-PAGE and mass spectrometry analysis demonstrated that the Fe3O4@PDA-PBA magnetic microspheres had much high binding capacity and selectivity for glycoproteins/glycopeptides compared to nonglycoproteins/nonglycopeptides. In addition, the practicability of the Fe3O4@PDA-PBA magnetic microspheres was further assessed by selective capture of glycoproteins from healthy hu- man serum. The good results demonstrated its potential in glycoproteome analysis. 展开更多
关键词 magnetic microspheres click chemistry phenylboronic acid ENRICHMENT glycoproteins GLYCOPEPTIDES
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Application of magnetic solid phase extraction in separation and enrichment of glycoproteins and glycopeptides 被引量:1
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作者 He Qi Liyan Jiang Qiong Jia 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第9期2629-2636,共8页
The analysis of endogenous glycoproteins and glycopeptides in human body fluids is of great importance for screening and discovering disease biomarkers with clinical significance.However,the presence of interfering su... The analysis of endogenous glycoproteins and glycopeptides in human body fluids is of great importance for screening and discovering disease biomarkers with clinical significance.However,the presence of interfering substances makes the direct quantitative detection of low-abundance glycoproteins and glycopeptides in human body fluids one of the great challenges in analytical chemistry.Magnetic solid phase extraction(MSPE)has the advantages of easy preparation,low cost and good magnetic responsiveness.Magnetic adsorbents are the core of MSPE technology,and magnetic adsorbents based on different functional materials are widely used in the quantitative analysis of glycoproteins and glycopeptides in human body fluids,making it possible to analyze glycoproteins and glycopeptides with low abundance as well as multiple types,which provides a technical platform for screening and evaluating glycoproteins and glycopeptides in body fluids as disease biomarkers.In this paper,we focus on the recent advances in the application of MSPE technology and magnetic adsorbents for the separation and enrichment of glycoproteins and glycopeptides in human body fluids,and the future trends and application prospects in this field are also presented. 展开更多
关键词 glycoproteins GLYCOPEPTIDES Magnetic solid phase extraction(MSPE) SEPARATION ENRICHMENT Human body fluids
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Chemical synthesis of glycoproteins 被引量:1
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作者 Chi Lung Lee Xuechen Li 《Science China Chemistry》 SCIE EI CAS CSCD 2016年第9期1061-1064,共4页
Recently, there has been an overwhelming demand for studies on protein post-translational modification (PTM) to understand the increasing complexity from the level of the genome to the proteome. The covalent modific... Recently, there has been an overwhelming demand for studies on protein post-translational modification (PTM) to understand the increasing complexity from the level of the genome to the proteome. The covalent modifications of proteins with phosphates, lipids, sugars or other residues confer on these proteins additional structural and functional diversity. For instance, protein phosphorylation is involved in a wide range of cellular processes including signal transduction. Protein glycosylation is one of the most abundant PTMs and more than 50% of all human proteins are glycosylated. Glycoproteins are involved in many biological events, such as cell-cell adhesion, communication, immune response and development. 展开更多
关键词 CHAINS glycoproteins PEPTIDES
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Disentangling brain PrP^(C)proteoforms and their roles in physiology and disease
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作者 Ilaria Vanni Nonno Romolo 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第5期963-965,共3页
The cellular prion protein(PrPC),a cell surface glycoprotein of 209 amino acids,has been considerably studied over the decades mainly due to its critical involvement in transmissible spongiform encephalopathies,or pri... The cellular prion protein(PrPC),a cell surface glycoprotein of 209 amino acids,has been considerably studied over the decades mainly due to its critical involvement in transmissible spongiform encephalopathies,or prion diseases.Indeed,it is the misfolding and aggregation of PrPC into pathological assemblies-named PrPSc-that constitute prions,the agents causing these unusual neurodegenerative diseases affecting humans and animals(Prusiner,1982).Furthermore,increasing evidence support its relevance also in other neurodegenerative diseases(NDDs),such as Alzheimer’s and Parkinson’s diseases(Corbett et al.,2020). 展开更多
关键词 diseases INVOLVEMENT GLYCOPROTEIN
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