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722 articles for “T cells”
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Research ArticleOpen accessIn the abstractVibrio cholerae O1 Strains of Different Ribotypes have Similar hlyA RFLP Patterns but Different Vacuolating AbilityJorge E. Vidal, Paula Figueroa-Arredondo, Silvia Giono-Cerezo et al.Extensive cytoplasmic vacuolation on Vero and HeLa cells in vitro by the Vibrio cholerae pore forming toxin HlyA, has been previously reported by our group. Vibrio cholerae O1 and non-O1 pathogenic strains show differences in the potential to induce vacuolation, here we study occurring variations on vacuolating cytotoxic ability, related to changes in the nucleotide sequence of the hlyA-orf. A … …American Journal of Infectious Diseases, Vol. 3, Issue 2 · 30 Jun 2007 · 6,989 accessesView PDFCite
Research ArticleOpen accessIn the abstractHIV-1-Specific CTL Recognizing a Scarce Epitope Are Not Suppressed by HIV-1 Protease InhibitorsOtto O. YangHIV-1-protease inhibitors have received growing attention as agents that can affect proteases in human proteasomes, with potentially deleterious effects for HIV-1-specific cellular immunity. Studying the antiviral activity of HIV-1-specific CTL that recognize an epitope that is presented at limiting concentrations on infected cells, we find that several HIV-1 protease inhibitors do not affect their function. These data indicate that these … …American Journal of Immunology, Vol. 3, Issue 1 · 30 Jun 2007 · 7,019 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of pH on the Conformation and Biological Activity of Clostridium septicum Alpha-toxin, a Pore-forming HemolysinB.M. Hang'ombe, T. Kohda, M. Mukamoto, S. KozakiThe effects of pH on the pore-forming Clostridium septicum alpha-toxin that causes myonecrosis was assessed at pH 5.0, 7.0 and 9.0 by measuring circular dichroism and its biological activity. Incubation of the toxin at pH 5.0 increased the hemolytic activity measured in murine red blood cells. On the other hand, incubation of the toxin at pH 9.0 drastically reduces the … …American Journal of Animal and Veterinary Sciences, Vol. 2, Issue 2 · 30 Jun 2007 · 6,905 accessesView PDFCite
Research ArticleOpen accessIn the abstractRetinoids Chemosensitize Ovarian Cancer Cell Lines to Cisplatin Independent of Nuclear Receptors and p53Suresh Guruswamy, Doris M. BenbrookTreatment of ovarian cancer with cisplatin-based chemotherapy is highly toxic and is often followed by cancer recurrence. Repeated treatments with cisplatin frequently result in the development of resistance to this drug. Drugs with low toxicity that could enhance the tumor cell killing effects of cisplatin could potentially reduce the toxicity and enhance the efficacy of cisplatin. The mechanism of cell … …American Journal of Pharmacology and Toxicology, Vol. 1, Issue 4 · 31 Dec 2006 · 6,962 accessesView PDFCite
Research ArticleOpen accessIn the abstractHigh Concentrations of Glucose can Activate or Inhibit Human Erythrocyte Aminolevulinate Dehydratase in vitro Depending Exposure TimeJ. C. Soares, D. Gabriel, V. Folmer et al.Hyperglycemia can cause oxidative stress and inactivate susceptible enzymes. In the present investigation we examined whether short-term incubations (24 or 48 h) with high concentrations of glucose (10-200 mmol L-1) inhibit ALA-D from human erythrocytes. Incubations of erythrocytes for 24 h with glucose (10 up to 40 mmol L-1) resulted in an increase of δ-ALA-D activity (P<0,001). Incubations of erythrocytes … …American Journal of Biochemistry and Biotechnology, Vol. 2, Issue 4 · 31 Dec 2006 · 6,689 accessesView PDFCite
Research ArticleOpen accessIn the abstractWound Healing Process of Uncomplicated “Rusterholz” Ulcer, Following Treatment by Wooden Block and Hoofgel® in Bovine Hoof: Histopathological AspectsH. Azarabad, I. Nowrouzian, E. Soleymani et al.A broad and very detailed histopathological knowledge on cutaneous wound healing particularly in human skin is available, but few studies have documented this event in bovine claw sole ulcers. It seems the mechanism of wound healing might be basically the same followed by second intention healing which is finished in a period of time by formation of granulation tissue in … …American Journal of Animal and Veterinary Sciences, Vol. 1, Issue 2 · 31 Dec 2006 · 7,853 accessesView PDFCite
Research ArticleOpen accessIn the abstractCharacteristic Curve of a Fuel CellMuzamir Isa, Baharuddin Ismail, Che Mat Hadzer et al.The aim of this study was to deliver information about the features of fuel cells. It cover analysis of theory and experiment done using a set of tool called Hydro Genius Teach. The experiment is about investigating the characteristic curve of a fuel cell from the processes of renewable energy. Others objectives of this study were to analyze current usage … …American Journal of Applied Sciences, Vol. 3, Issue 12 · 31 Dec 2006 · 7,835 accessesView PDFCite
Research ArticleOpen accessIn the abstractCPI-1189 Protects Against Dextran Sulfate Sodium-induced Colitis in MiceBeverley Greenwood-Van Meerveld, Karl R. TylerNitrone-related therapeutics (NRTs) represent a new class of small molecules potentially effective in the treatment of inflammatory bowel disease (IBD) by protecting cells from damage caused by excess inflammation and/or oxidative stress. The goal of this study was to determine the efficacy and potency of CPI-1189, a novel therapeutic agent, in dextran sulfate sodium (DSS)-induced colitis in mice. Mice received … …American Journal of Pharmacology and Toxicology, Vol. 1, Issue 3 · 30 Sep 2006 · 6,716 accessesView PDFCite
Research ArticleOpen accessIn the abstractUltrastructural and Immunological Characterization of Hepatitis C Core Protein-DNA Plasmid ComplexesNelson Acosta-Rivero, Yaraima Aguilera, Viviana Falcon et al.Recently, it has been shown that a truncated HCV core (HCcAg) variant, covering the first 120 aa (HCcAg.120), interacts with plasmid DNA vaccine (pIDKE2), encoding the HCV structural proteins (HCcAg, E1 and E2). In the present work, HCcAg.120-pIDKE2 complexes, forming heterogeneous packaged structures, were visualized using a negative stain/rotary shadow technique. Interestingly, 72 hours after intramuscular injection of HCcAg.120-pIDKE2 complexes … …American Journal of Immunology, Vol. 2, Issue 3 · 30 Sep 2006 · 6,746 accessesView PDFCite
Research ArticleOpen accessIn the abstractLeishmania donovani: Immunomodulatory Role of 63KDa Leishmania Antigen in the Promotion of IFN-gamma Response (VL vs HIV-VL Co-infection)Pranati, Sanjiva Bimal, K. Pandey et al.Cytokine behavior of T-lymphocytes is not very clear when a patient is co-infected with Leishmania donovani and HIV. To achieve this we studied groups of patients comprising of VL infected, HIV infected and HIV-VL co-infected cases. As compared to lone infections by either of the infecting agent, the co-infection cases showed greatly diminished CD4 T-cell counts and slightly enhanced values … …American Journal of Immunology, Vol. 2, Issue 2 · 30 Jun 2006 · 7,005 accessesView PDFCite