Search results for "present"

Living in a Cul-de-Sac: Women's representation and gender identity in Desperate Housewives

2010

  Median tuottamat representaatiot vaikuttavat paljon siihen, miten ihmiset käsittävät todellisuuden. Tutkimalla representaatioita ja niiden vaikutuksia voidaan tuoda esille ideologiat ja valta-suhteet jotka vaikuttavat representaatioiden takana. Representaatiot eivät siis ole neutraaleja esityksiä, vaan niillä on aina oma näkökulmansa todellisuuteen. Tämän tutkimuksen tarkoituksena on havainnollistaa naisten representointia mediassa ja tuoda esille sukupuoli-identiteetin rakentumista representaatioissa. Aineistona tutkimuksessa on käytetty tv-sarjan Täydelliset Naiset viittä jaksoa neljänneltä tuotantokaudelta. Sarjan ajankohtaisuus, suosio, laajalevikkeisyys sekä naishahmojen runsaus toim…

"Tässä ryhmässä olen aika hyvä" : ekologinen näkökulma kielenoppijaidentiteetteihin peruskoulun viidennen ja kuudennen luokan englannin opetuksessa

2012

T-Cell Epitope Processing (The Epitope Flanking Regions Matter)

2009

Epitopes presented by major histocompatibility complex (MHC) class I molecules for cytotoxic T-lymphocyte (CTL) recognition are derived mainly from cytosolic proteins. Antigen presentation on the cell surface requires correct processing of epitopes by the proteasome, cytosolic and endoplasmic reticulum (ER) aminopeptidases, efficient TAP transport, and sufficient binding to MHC class I molecules. The efficiency of the epitope generation depends not only on the epitope itself but also on its flanking regions. To investigate preferences at the C-terminal epitope extension on processing and presentation, the SIINFEKL (S8L) epitope can be used as a model epitope. By exchanging the amino acids a…

Activity of the dietary flavonoid, apigenin, against multidrug-resistant tumor cells as determined by pharmacogenomics and molecular docking

2015

Apigenin is a common dietary flavonoid with considerable cytotoxic activity in vitro and in vivo. Despite many mechanistic studies, less is known about resistance factors hampering apigenin's activity. We investigated the ATP-binding cassette (ABC) transporters BCRP/ABCG2, P-glycoprotein/ABCB1 and its close relative ABCB5. Multidrug-resistant cells overexpressing these ABC transporters were not cross-resistant toward apigenin. Moreover, apigenin inhibited not only P-glycoprotein but also BCRP by increasing cellular uptake of doxorubicin and synergistic inhibition of cell viability in combination with doxorubicin or docetaxel in multidrug-resistant cells. To perform in silico molecular docki…

Allorestricted T lymphocytes with a high avidity T-cell receptor towards NY-ESO-1 have potent anti-tumor activity.

2009

The cancer-testis antigen NY-ESO-1 has been targeted as a tumor-associated antigen by immunotherapeutical strategies, such as cancer vaccines. The prerequisite for a T-cell-based therapy is the induction of T cells capable of recognizing the NY-ESO-1-expressing tumor cells. In this study, we generated human T lymphocytes directed against the immunodominant NY-ESO-1(157-165) epitope known to be naturally presented with HLA-A*0201. We succeeded to isolate autorestricted and allorestricted T lymphocytes with low, intermediate or high avidity TCRs against the NY-ESO-1 peptide. The avidity of the established CTL populations correlated with their capacity of lysing HLA-A2-positive, NY-ESO-1-expre…

Deficient expression of components of the MHC class I antigen processing machinery in human cervical carcinoma.

2001

In cervical carcinomas abnormalities in the MHC class I surface expression are a frequent event, which are often associated with the deficient expression of the peptide transporter subunit TAP1 thereby resulting in impaired T cell response. In order to understand the role of other components of the MHC class I antigen processing machinery (APM) in the immune escape, 16 surgically removed primary cervical carcinoma lesions were analyzed for their mRNA expression of the heterodimeric peptide transporter TAP, the constitutive and interferon (IFN)-gamma inducible proteasome subunits and their activators PA28alpha/beta, various chaperones as well as MHC class I antigens. High expression levels o…

HLA class I antigen abnormalities and immune escape by malignant cells

2002

Abbreviations used in this paper: APM, antigen processing machinery; β2m,β2 microglobulin; bp, base pair; CTL, cytotoxic T lymphocytes; ER, endoplasmic reticulum; HC, heavy chain; HNSCC, head and neck squamous cell carcinoma; IFN, interferon; IL, interleukin; KIR, killing inhibitory receptors; LMP, low molecular weight proteins; LOH, loss of heterozygosity; mAb, monoclonal antibody; MHC, major histocompatibility complex; NK, natural killer; PA, proteasome activator; PCR, polymerase chain reaction; RCC, renal cell carcinoma; SCLC, small cell-lung carcinoma; TAA, tumor-associated antigens; TAP, transporter associated with antigen processing; TCR, T cell receptor; TNF, tumor necrosis factor; w…

In the literature: June 2020.

2020

Immunotherapy based on checkpoint blockade has revolutionised cancer treatment during last years. Whereas this approach fails in a relevant group of patients, the knowledge on tumour microenvironment (TME) opened the possibility to the use of additional therapeutic strategies to potentiate antitumour immunity, including depletion of protumourigenic or immune suppressive and activation of specific immune populations using agonistic antibodies. Nevertheless, due to the complexity of the TME, many of these strategies have been indiscriminately advanced to the clinic without clear mechanistic hypotheses. Nowadays, single-cell RNA sequencing (scRNA-seq)-based transcriptome analyses identify T ce…

P11.09 Pan-RTK inhibition of sLRIG1 mediates AXL downregulation in Glioblastoma

2019

Abstract INTRODUCTION Aberrant regulation of receptor tyrosine kinase (RTK) activity is characteristic of Glioblastoma (GBM). However, RTK-based targeted therapies have been largely unsuccessful in GBM patients, partially due to the complexity and redundance of RTK signaling. LRIG1 (Leucine-rich Repeats and ImmunoGlobulindomains protein 1) is known as an endogenous inhibitor of epidermal growth factor receptor (EGFR) during health and disease, however its mechanism of action is poorly understood. We previously showed that the soluble form of LRIG1 potently inhibits of GBM growth in vivo, irrespective of EGFR expression level and status, suggesting the involvement of other RTKs. Here, we aim…

Impaired HLA-class-I stability in a sarcoma cell line which stimulates exclusively HLA-class-II-restricted autologous T cells

1996

Defects in the generation and transport of antigenic peptides within tumor cells will lead to the expression of unstable HLA-class-I molecules on the cell surface. These defects will allow tumor cells to escape an MHC-class-I-restricted T-cell response. Recently, we described an exclusively HLA-class-II-restricted autologous T-cell response against a human sarcoma cell line MZ-MES-1 in vitro. Here, we show that surface HLA-class-I molecules of MZ-MES-1 cells are unstable at physiological temperature. HLA-class-I surface expression of MZ-MES-1 cells could be strongly enhanced by culture at low temperature in contrast to various other cell lines analyzed in parallel. Furthermore, culture at l…