... in TNF-α production In general, TNF-α is regarded as a pro -inflammatory cytokine that is produced in response to injury, exerting a number of important roles in the immune system and during inflammatory ... interleukin-1 receptor binds the human interleukin-1 alpha precursor but not the interleukin-1 beta precursor J Biol Chem 1987, 262:2941-2944 Dinarello CA: The IL-1 family and inflammatory diseases ... to increase the expression of several pro -inflammatory cytokines, including IL-6 and TNF-α [87] Considering the role of mast cells, especially in allergic inflammation, it would appear pertinent...
Ngày tải lên: 11/08/2014, 08:21
... There is increasing evidence for the interplay of the renin–angiotensin system and in ammatory events [5] Pre-eclampsia is associated with circulating autoantibodies against the AT1 protein that ... angiotensin converting enzyme in patients with connective tissue diseases Arthritis Res Ther 2010, 12:R85 Chappell MC: Emerging evidence for a functional angiotensin-converting enzyme 2-angiotensin-(1-7) ... Indeed, identification of endogenous ACE2 inhibitors is important in lieu of optimizing the therapeutic benefits following administration of recombinant soluble ACE2, as recently demonstrated in...
Ngày tải lên: 12/08/2014, 14:22
Báo cáo y học: " Role of the Fas/FasL Pathway in HIV or SIV Disease" ppsx
... killing for HIV vaccine/ therapeutics design Knowing the role for uninfected bystander cell killing in disease has not resolved the challenge of applying this information to treating HIV in man ... cytotoxic T cells in a Fas-independent manner [52] Indirect cell death, or killing of uninfected "bystander" cells, has also been documented in vivo All leukocytes, including uninfected bystander ... in AIDS Major mechanisms of leukocyte cell loss in AIDS Two models for cell death in AIDS are the direct and indirect killing of leukocytes during disease progression Direct killing, or killing...
Ngày tải lên: 12/08/2014, 23:22
Báo cáo y học: " Role of the C-terminal domain of the HIV-1 glycoprotein in cell-to-cell viral transmission between T lymphocytes" potx
... expressing HIV-CA and thus being productively infected, was established by intracellular p24 staining In line with previous reports [7,43], we confirmed that addition of AMD3100 prior to mixing of infected ... Env incorporation into released virions Nevertheless, HIV-Env-Tr712 virions, encoding Env lacking the CT domain, when produced in transfected adherent cells or in infected permissive cells did incorporate ... in the absence of Env [46] Since the EnvCT has been shown to be able to influence Gag localisation in other cell systems [28,29], we were interested in comparing the localisation of HIV-Gag in...
Ngày tải lên: 12/08/2014, 23:23
Báo cáo y học: "Role of the long cytoplasmic domain of the SIV Env glycoprotein in early and late stages of infection" ppt
... of infection the numbers of infected cells were compared in dividing and non-dividing cells (Fig 2) Similar levels of blue staining nuclei were observed in dividing and non-dividing cells in ... similar titer determined as described in Methods, to infect about 30 to 50 dividing cells Non-dividing cells were arrested in the G1-S phase of the cell cycle by using aphidicolin, an inhibitor of eukaryotic ... glycoproteins of retroviruses play an important role in the initial steps of infection involving the binding to cell surface receptors and entry by membrane fusion The Env glycoprotein also plays...
Ngày tải lên: 13/08/2014, 05:22
The Role of Genetically Modified Organisms (GMOs) in Beverage Production
... lecithin Genetic engineering has also been used to produce vitamins and ßavors, and many milk-derived ingredients used in beverages have been derived from cows treated with recombinant bovine somatotropin ... adopted labeling guidelines for foods containing ingredients derived from GM crops Because GM foods are perceived negatively in these countries, food manufacturers try to avoid GM ingredients in order ... associated with disease prevention, e.g., lycopene in tomatoes and sulfurofane in broccoli for reducing cancer risk, lutein in vegetables for reducing risk of macular degeneration, etc The advancing Þelds...
Ngày tải lên: 25/10/2013, 21:20
Tài liệu Báo cáo khoa học: The central role of CDE/CHR promoter elements in the regulation of cell cycle-dependent gene transcription pdf
... activating E2Fs cooperate with NF-Y proteins binding to CCAAT-boxes and with Myb proteins associating with a distal Myb site in activating the Cdc2 promoter Binding of the activating E2Fs during ... monitored by in vivo footprinting According to these early experiments all binding is lost in G2 ⁄ M In contrast, constitutive binding to the CCAAT-boxes is observed Trimeric NF-Y binds to the ... confirmed by Lin-54 binding to the CHR, cooperating with E2F4 binding to the CDE in EMSAs in vitro [86] ChIP experiments on the Cdc2 gene also provided insights into the association of other cell...
Ngày tải lên: 16/02/2014, 09:20
Tài liệu Báo cáo Y học: Steady-state kinetics of the glutaminase reaction of CTP synthase from Lactococcus lactis The role of the allosteric activator GTP in coupling between glutamine hydrolysis and CTP synthesis potx
... takes place only in the presence of UTP [1] Levitzki and Koshland originally suggested a mechanism as shown in Scheme 1B [9] This mechanism involves another intermediate, a carbinol amine, formed ... substrate injection was calculated from Vinj ẵEj ẳ ẵEj1 exp 2ị Vcell 4ị % Inhibition ẳ 100% In Kn ỵ In I 7ị where KI is the concentration of inhibitor that gives rise to 50% inhibition by the inhibitor ... described in the legend to the indicated Fig Glutaminase refers to hydrolysis of glutamine without CTP synthesis taking place b In the absence of GTP c Saturated with GTP d The other kinetic parameters...
Ngày tải lên: 21/02/2014, 15:20
Báo cáo khoa học: Role of the C-terminal extension in a bacterial tyrosinase Michael Fairhead and Linda Thony-Meyer doc
... histidine 80 in the V spinosum tyrosinase Another motif, which is present not only in Tyr349 Tyr347 Features of the amino acid sequence of the V spinosum tyrosinase Copper binding motif Copper binding ... copper B (amino acids 258–294) binding motifs common to most tyrosinase sequences [3] that contain five of the six copper-binding histidine ligands The sixth histidine ligand found in tyrosinases typically ... 358–518 Core domain 36–357 tyrosinases, but also in the oxygen transporting haemocyanin proteins, is the PYWDW (amino acids 118–122) and has been hypothesized to be involved in oxygen binding [26] Previous...
Ngày tải lên: 06/03/2014, 11:20
The Role of Small and Large Businesses in Economic Development doc
... economy moving and growing, although small firms may be more efficient at innovation Small firms are the great innovators in some industries, while large firms are the great innovators in others ... greater returns by investing the same resources in creating a more conducive business environment for existing firms—both large and small Thus, recruiting large firms is often costly, in both direct ... from longitudinal data from individual firms The job figures presented in Chart classify firms into size classes based on their size at the beginning of the period, which favors a finding of higher...
Ngày tải lên: 06/03/2014, 19:20
Báo cáo khoa học: The role of evolutionarily conserved hydrophobic contacts in the quaternary structure stability of Escherichia coli serine hydroxymethyltransferase pptx
... hydrophobic contacts in serine hydroxymethyltransferase to bind PLP In this intermediate, the N-terminus and an inter-domain segment remain exposed to solvent In the following, slow phase, these ... protein scaffolds, allowing the proper positioning of the residues involved in PLP binding, substrate binding and modulation of the cofactor’s catalytic properties The third cluster forms a hinge ... value determined from the amino acid sequence (45 320 Da) Measurement of the Kd of PLP binding equilibrium PLP binding equilibria were analyzed taking advantage of the protein intrinsic fluorescence...
Ngày tải lên: 07/03/2014, 03:20
Báo cáo khoa học: Use of lithium and SB-415286 to explore the role of glycogen synthase kinase-3 in the regulation of glucose transport and glycogen synthase pdf
... the kinase has been implicated in down-regulating insulin signalling via its ability to serine phosphorylate IRS1 [40], it is possible that inhibition of GSK3 potentiates insulin signalling at ... submaximal insulin dose (Fig 5) These findings are not entirely out of line with work from rodent studies showing that whilst GSK3 inhibition improves insulin responsiveness in muscle of insulin resistant ... allowing for more effective ÔchannellingÕ of glucose into glycogen in response to insulin However, one of the potential difficulties in interpreting data from studies that utilize Li as an inhibitor...
Ngày tải lên: 08/03/2014, 08:20
The Role of Gestures and Facial Cues in Second Language Listening Comprehension pptx
... comprehension task was used to minimize the confounding of listening with other skills such as speaking or writing and for effectiveness within time constraints (Dunkel, Henning, & Chaudron, 1993) Three ... Talking to Americans Attending class Radio/CD Talking to friends in English 3 0 19 16 14 4 19 19 Q8: Improve speaking Higher Lower Ranking Total Total Talking to Americans TV Talking to friends in ... Learning Vol 55, No into the room during recording The lecturer was instructed to speak as if she were speaking to a whole class The video was edited with iMovie, a movie-editing program for Macintosh...
Ngày tải lên: 10/03/2014, 05:20
Báo cáo khoa học: The role of the Fe-S cluster in the sensory domain of nitrogenase transcriptional activator VnfA from Azotobacter vinelandii potx
... reported by Austin et al [22] In their study, the N-terminal domain of AnfA was truncated to prevent the intrinsic aggregation of the intact form during purification The obtained variant retained transcriptional ... may reside in the GAF domain and the environmental factors affecting AnfA activity remain unknown because of the absence of the N-terminal domain in this variant Because sensing is a principal function ... and selecting transformants on LB agar plates containing kanamycin A clone bearing a single copy of the recombinant k-prophage was selected and used in the subsequent procedures This strain was...
Ngày tải lên: 15/03/2014, 09:20
Bringing the Hidden Giants to the Footlight: the Role of Savings and Retail Banks in Increasing the Level of Access to Financial Services docx
... program in wholesale lending to microfinance institutions for lending to their micro borrowers Savings banks could refinance well-functioning microfinance institutions individually or indirectly ... deposits in microfinance institutions by specialising 18 Microfinance Information eXchange, Inc Linking remittances flows to microcredit products: Savings banks have a natural role to play in the ... is misleading to think about them as savings-only institutions Research has shown that across the developing world non-postal savings Minimum fee to open a savings account at a Savings Bank Table...
Ngày tải lên: 15/03/2014, 10:20
Báo cáo khoa học: Isothermal unfolding studies on the apo and holo forms of Plasmodium falciparum acyl carrier protein Role of the 4¢-phosphopantetheine group in the stability of the holo form of Plasmodium falciparum acyl carrier protein docx
... proteinprotein interface [31] All of the interactions reported in Fig in the range between and 6.0 A are identical in the major and minor fractions of the holoprotein in solution In fact, the ... reected in 3324 E coli AcpS [38] was cloned in the pET22b(+) vector as a C-terminal hexa-histidine tag fusion protein in the laboratory The recombinant protein was heterologously expressed in E ... oxidizing conditions (c) Apo-ACP (O) and holo-ACP (h) in each fraction was quantied by measuring the intensity of the silver-stained protein bands using QUANTITY ONE software and plotted against...
Ngày tải lên: 16/03/2014, 10:20
Báo cáo Y học: Elucidation of the role of fructose 2,6-bisphosphate in the regulation of glucose fluxes in mice usingin vivo 13 C NMR measurements of hepatic carbohydrate metabolism docx
... control (solid line) and ADM mouse (dashed line) 13C glucose concentration in the liver was maintained at about 10 lmolÆg)1 in both groups as shown in the top plot that into glycogen C1 in both groups, ... changes in vivo, which reflects the indirect pathway 13 C NMR spectra were acquired while infusing [1-13C] glucose in an ADM mouse over 7.6 h (Fig 2) The glucose level in the liver was maintained ... achieved in the intact liver in vivo The importance of the detection of label incorporation into glycogen C6 while infusing [1-13C]glucose can be appreciated from the fact that this labeling pattern...
Ngày tải lên: 17/03/2014, 17:20
Báo cáo Y học: The role of hydrophobic active-site residues in substrate specificity and acyl transfer activity of penicillin acylase pdf
... Ki in which Kmapp is the Km for NIPAB in the presence of inhibitor, [I] the inhibitor concentration, and Ki the inhibition constant or binding constant for the substrate The kcat was determined ... mutations may in uence the shape and volume of the acyl binding pocket and thereby alter the binding mode and affinity of the enzyme for PAA and derivatives thereof, while maintaining the hydrophobicity ... ratio between hydrolysis and aminolysis was changed by changing the catalytic nucleophile By replacing the activesite serine in subtilisin with a cysteine, a 104-fold increased Vs/Vh ratio compared...
Ngày tải lên: 17/03/2014, 23:20
The role of floating-rate bank loans in institutional portfolios pdf
... Leveraged Loan Index is significantly lower than durations in the traditional fixed income asset classes, reflecting the prevalence of floating rate instruments in the loans universe and hence minimal ... High Yield Index JPMorgan Emerging Market Bond Index Global Index S&P/LSTA Leveraged Loan Index * Barclays Capital US Long Credit Index Barclays Capital US Corporat e Investment Grade Index Barclays ... in rising interest rate environments In the past 20 years (since 1992), there have been three periods of significant rate increases, as identified by rising 3-month Treasury yields and a rising...
Ngày tải lên: 22/03/2014, 17:20