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Huang YH, Sun MJ, Jiang M, Fu BY. Immunohistochemical localization of glucagon and pancreatic polypeptide on rat endocrine pancreas: coexistence in rat islet cells. Eur J Histochem 2009; 53:81-5. [PMID: 19683981 DOI: 10.4081/ejh.2009.81] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We used immunofluorescence double staining method to investigate the cellular localization of glucagon and pancreatic polypeptide (PP) in rat pancreatic islets. The results showed that both A-cells (glucagon-secreting cells) and PP-cells (PP-secreting cells) were located in the periphery of the islets. However, A-cells and PP-cells had a different regional distribution. Most of A-cells were located in the splenic lobe but a few of them were in the duodenal lobe of the pancreas. In contrast, the majority of PP-cells were found in the duodenal lobe and a few of them were in the splenic lobe of the pancreas. Furthermore, we found that 67.74% A-cells had PP immunoreactivity, 70.92% PP-cells contained glucagon immunoreactivity with immunofluorescence double staining. Our data support the concept of a common precursor stem cell for pancreatic hormone-producing cells.
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252
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Xiao Z, Gao X, Jiang M, Zhang Z. Behavioral adaptation of Pallas's squirrels to germination schedule and tannins in acorns. Behav Ecol 2009. [DOI: 10.1093/beheco/arp096] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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253
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Huang YH, Sun MJ, Jiang M, Fu BY. Immunohistochemical localization of glucagon and pancreatic polypeptide on rat endocrine pancreas: coexistence in rat islet cells. Eur J Histochem 2009; 53:e10. [PMID: 30256861 PMCID: PMC3167281 DOI: 10.4081/ejh.2009.e10] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2009] [Indexed: 11/22/2022] Open
Abstract
We used immunofluorescence double staining method to investigate the cellular localization of glucagon and pancreatic polypeptide (PP) in rat pancreatic islets. The results showed that both A-cells (glucagon-secreting cells) and PP-cells (PP-secreting cells) were located in the periphery of the islets. However, A-cells and PP-cells had a different regional distribution. Most of A-cells were located in the splenic lobe but a few of them were in the duodenal lobe of the pancreas. In contrast, the majority of PP-cells were found in the duodenal lobe and a few of them were in the splenic lobe of the pancreas. Furthermore, we found that 67.74% A-cells had PP immunoreactivity, 70.92% PP-cells contained glucagon immunoreactivity with immunofluorescence double staining. Our data support the concept of a common precursor stem cell for pancreatic hormone-producing cells.
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254
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Yi G, Wang J, Ruan C, Jiang M, Mo Z, Li X, Zeng Y. Abstract: S2-20 EFFECTS OF PPARΔ AGONIST GW501516 ON MMP-2 EXPRESSION INDUCED BY OX-LDL OR HIGH GLUCOSE IN HUVEC. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71475-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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255
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Yi G, Ruan C, Wang J, Jiang M, Zeng Y, Li X, Zhang Q, Li Y. Abstract: S2-19 THE ROLE OF PPARΔ IN MMP-2 EXPRESSION AND APOPTOSIS OF HUVEC INDUCED BY OX-LDL AND HIGH GLUCOSE. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71474-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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256
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Lim B, Jiang M, Camargo PHC, Cho EC, Tao J, Lu X, Zhu Y, Xia Y. Pd-Pt Bimetallic Nanodendrites with High Activity for Oxygen Reduction. Science 2009; 324:1302-5. [DOI: 10.1126/science.1170377] [Citation(s) in RCA: 2623] [Impact Index Per Article: 174.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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257
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Chen P, Hu T, Jiang M, Guo D. [Synthesis in Escherichia coli cells and characterization of the active exoribonuclease of severe acute respiratory syndrome coronavirus]. Mol Biol (Mosk) 2009; 43:446-454. [PMID: 19548531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The nsp14 protein, an exoribonuclease of the DEDD superfamily encoded by severe acute respiratory syndrome coronavirus (SARS-CoV), was expressed in fusion with different affinity tags. The recombinant nspl4 proteins with either GST fusion or 6-histidine tag were shown to possess ribonuclease activity but nspl4 with a short MGHHHHHHGS tag sequence at the N-terminus increased the solubility of nspl4 protein and facilitated the protein purification. Mutations of the conserved residues of nspl4 resulted in significant attenuation but not abolishment of the ribonuclease activity. Combination of fluorescence and circular dichroism spectroscopy analyses showed that the conformational stability of nsp14 protein varied with many external factors such as pH, temperature and presence of denaturing chemicals. These results provide new information on the structural features and would be helpful for further characterization of this functionally important protein.
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258
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Jiang M, Ma P. Coherence resonance induced by rewiring in complex networks. CHAOS (WOODBURY, N.Y.) 2009; 19:013115. [PMID: 19334979 DOI: 10.1063/1.3076398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report a novel coherent excitation phenomenon in a heterogeneous network of coupled FitzHugh-Nagumo elements. It is demonstrated that dynamical rewiring in the network can play a constructive role to bring on coherent excitations. The coherence factor as the function of rewiring time interval represents a nontrivial phenomenon which is a fingerprint of coherence resonance. We call this resonant behavior caused by dynamical wiring changes the network-rewiring-induced coherence resonance. The mechanism can be understood by the effective noise played by the rewiring process.
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259
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Chen P, Hu T, Jiang M, Guo D. Synthesis in Escherichia coli cells and characterization of the active exoribonuclease of severe acute respiratory syndrome coronavirus. Mol Biol 2009; 43:410-417. [PMID: 32214468 PMCID: PMC7089200 DOI: 10.1134/s0026893309030091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Accepted: 04/30/2008] [Indexed: 11/23/2022]
Abstract
The nsp14 protein, an exoribonuclease of the DEDD superfamily encoded by severe acute respiratory syndrome coronavirus (SARS-CoV), was expressed in fusion with different affinity tags. The recombinant nsp14 proteins with either GST fusion or 6-histidine tag were shown to possess ribonuclease activity but nsp14 with a short MGHHHHHHGS tag sequence at the N-terminus increased the solubility of nsp14 protein and facilitated the protein purification. Mutations of the conserved residues of nsp14 resulted in significant attenuation but not abolishment of the ribonuclease activity. Combination of fluorescence and circular dichroism spectroscopy analyses showed that the conformational stability of nsp14 protein varied with many external factors such as pH, temperature and presence of denaturing chemicals. These results provide new information on the structural features and would be helpful for further characterization of this functionally important protein.
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260
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Ning H, Yang F, Jiang M, Hu L, Feng K, Zhang J, Yu Z, Li B, Xu C, Li Y, Wang J, Hu J, Lou X, Chen H. Reply to “Reply to ‘The correlation between cotransplantation of mesenchymal stem cells and higher recurrence rates in hematologic malignancy patients: outcome of a pilot clinical study’ by Ning H et al.” by Behre et al. Leukemia 2009. [DOI: 10.1038/leu.2008.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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261
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Kurczy M, Piehowski P, Parry S, Jiang M, Chen G, Ewing A, Winograd N. Which is more important in bioimaging SIMS experiments-The sample preparation or the nature of the projectile? APPLIED SURFACE SCIENCE 2008; 255:1298-1304. [PMID: 19554199 PMCID: PMC2700758 DOI: 10.1016/j.apsusc.2008.05.139] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Sample preparation is central to acquiring meaningful molecule-specific images with SIMS, especially when submicron lateral resolution is involved. The issue is to maintain the distribution of target molecules while attempting to introduce biological cells or tissue into the high vacuum environment of the mass spectrometer. Here we compare freeze-drying, freeze-etching, freeze-fracture and trehalose vitrification as possible strategies for these experiments. The results show that the prospects for successful imaging experiments are greatly improved with all of these methods when using cluster ion bombardment, particularly C(60) (+) ions, not only due to increased sensitivity of this projectiles, but also since it removes contamination overlayers without insult to the underlying chemistry. The emergence of 3-dimensional imaging capabilities also suggests that sample preparation should not perturb the 3-dimensional morphology of the cell, a situation not generally possible during freeze-drying. Hence, sample preparation and projectile type are strongly coupled parameters for bioimaging with mass spectrometry.
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262
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Jiang M, Cao L, Zhang R. Effects of Acacia (Acacia auriculaeformisA. Cunn)-associated fungi on mustard (Brassica juncea(L.) Coss. var. foliosa Bailey) growth in Cd- and Ni-contaminated soils. Lett Appl Microbiol 2008; 47:561-5. [DOI: 10.1111/j.1472-765x.2008.02454.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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263
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Wamuziri S, Jiang M. Role of export credit agencies in PFI/PPP projects. PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-MANAGEMENT PROCUREMENT AND LAW 2008. [DOI: 10.1680/mpal.2008.161.4.163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The paper presents the results of an investigation into the role of export credit agencies (ECAs) in international private-finance initiative/public–private partnership (PFI/PPP) projects. The research was based on an assessment of published literature and a study of relevant official reports. The use of PFI/PPP procurement to deliver essential infrastructure continues to grow worldwide. In developing countries, funding raised locally through taxation, the money markets and official development assistance is inadequate to meet the required needs. PFI/PPP projects with foreign private participation provide a vital contribution to the acceleration of economic growth and provision of essential services and infrastructure. It is demonstrated in this paper that ECAs play a number of key multiple roles in international PFI/PPP projects. First, the role of ECAs can be as lenders. ECA loans can be offered to exporters, investors or directly to the special-purpose vehicle. ECAs also play the role of insurers/guarantors. ECAs are diversified in country risks and therefore best placed to cover political and non-commercial risks. They can provide cover for non-commercial risks which include: currency inconvertibility and transfer restrictions, expropriation, war and civil disturbance or breach of contract, etc. The professional advisory role includes arranging project finance and a disputes resolution service. ECAs play key multiple roles in the realisation of international PFI/PPP projects. They are clearly central to efficient risk management in such projects and for attracting foreign direct investment into infrastructure in developing countries.
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264
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Kuramochi D, Unoki H, Bujo H, Kubota Y, Jiang M, Rikihisa N, Udagawa A, Yoshimoto S, Ichinose M, Saito Y. Matrix metalloproteinase 2 improves the transplanted adipocyte survival in mice. Eur J Clin Invest 2008; 38:752-9. [PMID: 18837800 DOI: 10.1111/j.1365-2362.2008.02023.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Fat tissue is a common material for autologous transplantation in plastic and reconstructive surgery. Basic fibroblast growth factor (bFGF) ameliorates the fat graft survival. A transplantation model has shown the gene expression of matrix metalloproteinases (MMPs) to increase in adipocytes. The aim of this study is to investigate the role of MMPs in the amelioration of survival by bFGF. MATERIALS AND METHODS 3T3-L1 adipocytes were incubated with or without 10 microg mL(-1) bFGF for 8 h in the presence or absence of the MMP inhibitor GM6001, vascular endothelial growth factor (VEGF), MMP-2 or anti-bFGF antibody to study the effect of bFGF on MMP-2 mRNA expression, MMP-2 activity, fat accumulation or 2-deoxyglucose uptake. Collagen sheets containing l x l0(7) adipocytes with or without bFGF in the presence or absence of GM6001 were subcutaneously transplanted into mice, and the appearance, histology, mRNA expression and fat accumulation of the grafts were analysed 4 weeks after transplantation. RESULTS The MMP-2 expression was drastically induced by bFGF among MMPs in 3T3-L1 adipocytes. MMP-2 accelerated fat accumulation, peroxisome proliferator-activated receptor gamma (PPAR gamma) mRNA expression, and glucose uptake to an extent similar to those induced by bFGF, respectively. The bFGF-induced increases were inhibited by the blocking of MMP-2. The transplantation of adipocytes into mice showed that bFGF ameliorates the appearance and fat accumulation, as well as mRNA expression in grafts. These effects were almost or partly inhibited by a MMP blockade. CONCLUSIONS MMP-2 may be involved in the mechanism by which bFGF ameliorates the survival of fat grafts.
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Huhtaniemi I, Pye S, Limer K, Thomson W, O’Neill T, Platt H, Payne D, John S, Jiang M, Perheentupa A, Boonen S, Borghs H, Vanderschueren D, Adams J, Ward K, Bartfai G, Casanueva F, Finn J, Forti G, Giwercman A, Han T, Kula K, Lean M, Pendleton N, Punab M, Silman A, Wu F. Genetic aspects in the gender-specific aging of men. JOURNAL OF MEN'S HEALTH 2008. [DOI: 10.1016/j.jomh.2008.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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266
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Qian X, Jiang M, Shen HO, Zhang B, Durairaj K, Cong WX, Li XD, Henry M, Fajardo L, Wang G. WITHDRAWN: In vivo bioluminescent source estimation using computational optical biopsy. Med Eng Phys 2008; 30:808. [PMID: 17693117 DOI: 10.1016/j.medengphy.2007.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2006] [Revised: 05/24/2007] [Accepted: 06/16/2007] [Indexed: 11/16/2022]
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267
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Ashamalla H, Jiang M, Guirguis A. Phase I study of acupuncture as treatment of hot flashes for men with prostate cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.20678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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268
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Ning H, Yang F, Jiang M, Hu L, Feng K, Zhang J, Yu Z, Li B, Xu C, Li Y, Wang J, Hu J, Lou X, Chen H. The correlation between cotransplantation of mesenchymal stem cells and higher recurrence rate in hematologic malignancy patients: outcome of a pilot clinical study. Leukemia 2008; 22:593-9. [PMID: 18185520 DOI: 10.1038/sj.leu.2405090] [Citation(s) in RCA: 259] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In this open-label randomized clinical trial, HLA-identical sibling-matched hematopoietic stem cells (HSC) were transplanted (non-MSCs group, n=15) or cotransplanted with mesenchymal stem cells (MSCs) (MSCs group, n=10) in hematologic malignancy patients. The median number of MSCs infused was 3.4 x 10(5) kg(-1) (range, 0.3-15.3 x 10(5) kg(-1)). MSCs infusions were well tolerated. The median time to neutrophil engraftment (absolute neutrophil count >0.5 x 10(9) l(-1)) was 16 days for MSCs group and 15 days for non-MSCs group. The median time to platelet engraftment (platelet count >50 x 10(9) l(-1)) was 30 and 27 days, respectively. Grades II-IV acute graft-versus-host disease (GVHD) was observed respectively, in one (11.1%) and eight (53.3%) evaluable patients. Chronic GVHD was found in one (14.3%) and four (28.6%) evaluable patients. The number of patients who relapsed were six (60.0%) and three (20.0%), and the 3-year disease-free survivals were 30.0 and 66.7%, respectively. Thus cotransplantation of MSCs and HSCs may prevent GVHD, but the relapse rate is obviously higher than the control group. We conclude that use of MSCs must be handled with extreme caution before a large-scale clinical trial is performed.
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Sun BQ, Mahler M, Jiang M, Li J, Zhong NS. Allergen-specific IgE to inhalant and food allergens and total IgE values in China: comparison of 2 commercial immunoassays. J Investig Allergol Clin Immunol 2008; 18:319-321. [PMID: 18714546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
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270
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Shen XZ, Lu Q, Deng L, Yu S, Zhang H, Deng Q, Jiang M, Hu Y, Yao KH, Yang YH. Resistance of Haemophilus influenzae isolates in children under 5 years old with acute respiratory infections in China between 2000 and 2002. J Int Med Res 2007; 35:554-63. [PMID: 17697534 DOI: 10.1177/147323000703500416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This prospective, three-centre study tested for antimicrobial susceptibility in 898 isolates of Haemophilus influenzae between 2000 and 2002 in Chinese children aged under 5 years with acute upper respiratory tract infection. The average incidence of beta-lactamase production was 12.0%. Overall, 88.0% of isolates were susceptible to ampicillin, 100.0% were susceptible to amoxicillin/clavulanic acid, ceftriaxone, cefuroxime and azithromycin, and 99.0% were susceptible to ciprofloxacin. Isolates from Beijing and Shanghai had a lower susceptibility to tetracycline (57.0% and 61.0%, respectively) compared with those from Guangzhou (81.0%), while trimethoprim/sulfamethoxazole susceptibilities in Shanghai (47.0%) and Guangzhou (54.0%) were significantly higher than in Beijing (35.0%). A total of 34.5% of all the isolates were susceptible to all eight of these antimicrobial agents and 12.8% were multi-drug resistant. Ampicillin resistance increased over the duration of the study. These findings show that beta-lactamase production and ampicillin resistance among isolates from Chinese children with upper respiratory tract infection are increasing, and highlight the strong correlation between ampicillin resistance and resistance to cefaclor, chloramphenicol and tetracycline in H. influenzae isolates.
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271
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Jiang M, Luo Y, Yang S. Stochastic convergence analysis and parameter selection of the standard particle swarm optimization algorithm. INFORM PROCESS LETT 2007. [DOI: 10.1016/j.ipl.2006.10.005] [Citation(s) in RCA: 335] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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272
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Jiang M, Sullivan SM, Walker AK, Strahler JR, Andrews PC, Maddock JR. Identification of novel Escherichia coli ribosome-associated proteins using isobaric tags and multidimensional protein identification techniques. J Bacteriol 2007; 189:3434-44. [PMID: 17337586 PMCID: PMC1855874 DOI: 10.1128/jb.00090-07] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Biogenesis of the large ribosomal subunit requires the coordinate assembly of two rRNAs and 33 ribosomal proteins. In vivo, additional ribosome assembly factors, such as helicases, GTPases, pseudouridine synthetases, and methyltransferases, are also critical for ribosome assembly. To identify novel ribosome-associated proteins, we used a proteomic approach (isotope tagging for relative and absolute quantitation) that allows for semiquantitation of proteins from complex protein mixtures. Ribosomal subunits were separated by sucrose density centrifugation, and the relevant fractions were pooled and analyzed. The utility and reproducibility of the technique were validated via a double duplex labeling method. Next, we examined proteins from 30S, 50S, and translating ribosomes isolated at both 16 degrees C and 37 degrees C. We show that the use of isobaric tags to quantify proteins from these particles is an excellent predictor of the particles with which the proteins associate. Moreover, in addition to bona fide ribosomal proteins, additional proteins that comigrated with different ribosomal particles were detected, including both known ribosomal assembly factors and unknown proteins. The ribosome association of several of these proteins, as well as others predicted to be associated with ribosomes, was verified by immunoblotting. Curiously, deletion mutants for the majority of these ribosome-associated proteins had little effect on cell growth or on the polyribosome profiles.
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Jiang M, Wang R, Wang J, Jin D. A Method of Recognizing Finger Motion Using Wavelet Transform of Surface EMG Signal. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2005:2672-4. [PMID: 17282789 DOI: 10.1109/iembs.2005.1617020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
In this paper, an identification method of finger motions using the wavelet transform of multi-channel electromyography (EMG) signal is presented. The first step of this method is to analyze surface EMG signal detected from the subject's upper arm using the multi-resolution of wavelet transform, and extract features using the variance, maximum and mean absolute value of the wavelet coefficients. In this way, a new feature space is established by wavelet coefficients. The second step is to import the feature values into an Artificial Neural Network (ANN) to identify the finger motion. Based on the results of experiments, it is concluded that this method is effective in identification of finger motion. Thus, it provides an alternative approach to use the surface EMG in controlling the finger motion of a multi-fingered prosthetic hand.
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274
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Wei Q, Li M, Fu X, Tang R, Na Y, Jiang M, Li Y. Global analysis of differentially expressed genes in androgen-independent prostate cancer. Prostate Cancer Prostatic Dis 2007; 10:167-74. [PMID: 17199135 DOI: 10.1038/sj.pcan.4500933] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Progression to androgen independent (AI) is the main cause of death in prostate cancer, and the mechanism is still unclear. By reviewing the expression profiles of 26 prostate cancer samples in a holistic view, we found a group of genes differentially expressed in AI compared with androgen-dependent groups (P-value<0.01, t-test). Focusing on apoptosis, proliferation, hormone and angiogenesis, we found a group of genes such as thioredoxin domain containing 5 , tumor necrosis factor receptor superfamily, member 10a , ribosomal protein S19 and Janus kinase 2 upregulated in AI prostate cancer, could play important roles in the transition from AD to AI and could be biomarkers of prognosis.
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275
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Nie X, Zhang YJ, Tian WD, Jiang M, Dong R, Chen JW, Jin Y. Improvement of peripheral nerve regeneration by a tissue-engineered nerve filled with ectomesenchymal stem cells. Int J Oral Maxillofac Surg 2007; 36:32-8. [PMID: 17169530 DOI: 10.1016/j.ijom.2006.06.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2005] [Revised: 02/27/2006] [Accepted: 06/20/2006] [Indexed: 11/28/2022]
Abstract
Ectomesenchymal stem cells (EMSCs) originate from the cranial neural crest. They are a potential source of neuronal and Schwann cells (SCs) of the peripheral nervous system (PNS) during embryonic development. The third passage of EMSCs enzymatically isolated from the mandibular processes of Sprague-Dawley rats were cultured in forskolin and bovine pituitary extract for 6 days to generate functional Schwann cell phenotypes. Next, 10-mm defects in the sciatic nerves were bridged with an autograft, tissue-engineered nerve filled with differentiated cells in collagen, or a PLGA conduit alone in 18 rats, and the nerve defects of another four rats were left untreated. The regenerated nerves were evaluated by the sciatic functional index (SFI) monthly and by histological analysis 4 months after grafting. The recovery index of the sciatic nerve improved significantly in the autograft and tissue-engineered nerve groups, both of which were superior to the PLGA group. In animals transplanted with the EMSCs, there was greater regeneration than with conduit alone during the same period of implantation. These results show that when EMSCs are transplanted to a peripheral nerve defect they differentiate into supportive cells that contribute to the promotion of axonal regeneration.
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