Sökning: "Anti-tumor activity"
Visar resultat 1 - 5 av 59 avhandlingar innehållade orden Anti-tumor activity.
1. Synthesis of Bioactive Analogues of Marasmane Dialdehydes
Sammanfattning : The modification of drugs into pro-drugs is an attractive concept allowing you to tweak the chemical and physical properties of a drug without changing the original structure of the active compound. In principle, any compound possessing a preferred biological activity can be transformed into a pro-drug. LÄS MER
2. Distribution and Chemical Diversity of Cyclotides from Violaceae : Impact of Structure on Cytotoxic Activity and Membrane Interactions
Sammanfattning : During the last decade there has been increased interest in the cyclotide protein family, which consist of a circular chain of approximately 30 amino acids, including six cysteines that form three disulfide bonds, arranged in a cyclic cystine knot motif. This thesis gives new insights in cyclotide distribution and occurrence in the plant family Violaceae, structure-activity relationships for cytotoxic effects, membrane disruption and adsorption on lipid membranes, and evaluates toxicity and anti-tumor activity in vivo. LÄS MER
3. Telomerase activity and its regulation in malignant hematopoietic cells
Sammanfattning : Telomerase, a multicomponent ribonucleoprotein, synthesizes TTAGGG telomeric repeats essential for the stability and integrity of chromosomes. Most normal human somatic cells exhibit undetectable telomerase activity. LÄS MER
4. Fatal attraction : NK cell migration toward and activity in solid tumors
Sammanfattning : Natural killer (NK) cells play a key role in tumor immunosurveillance due to their ability to induce apoptosis of tumor cells and produce pro-inflammatory cytokines, without prior immune sensitization. In particular, NK cells demonstrate potent anti-tumor immune responses against metastases and hematological malignancies. LÄS MER
5. NO, Immunosuppression and Tumor Immmunotherapy
Sammanfattning : This study aims at clarifying the role of NO in the immunosuppression induced by in vivo tumor growth and by tumor immunotherapy, and determining whether the inhibition of NO production can be used as an adjuvant in tumor immunotherapy. We have shown previously that tumor cells, glioma (N32) and colon carcinoma (H1D2), when genetically engineered to express such immune stimulatory cytokines as IFN-g and IL-18, induce strong anti-tumor immune response, in immunized tumor-free rats, whereas only a limited therapeutic effect is achieved in rats in which a tumor has already become established. LÄS MER