32 results about "Tumorigenic cell" patented technology

Human breast tumors contain hetrogeneous cancer cells. using an animal xenograft model in which human breast cancer cells were grown in immunocompromised mice we found that only a small minority of breast cancer cells had capacity to form new tumors. The ability to form new tumors was not a slochastic property, rather certain populations of cancer cells were depleted for the ability to form new tumors, while other populations were enriched for the ability to form new tumors. Tumorigenic cells could be distinguished from non-tumorigenic cancer cells based on surface marker expression. We prospectively identified and isolated the tumorigenic cells as CD4430CD24− / lowLINEAGE A few as 100 cells from this population were able to form tumors the animal xenograft model, while tens of thousands of cells from non-tumorigenic populations failed to form tumors. The tumorigenic cells could be serially passaged, each time generating new tumors containing and expanded numbers of CD44+CD24 Lineage tumorigenic cells as well as phenotypically mixed populations of non-tumorigenic cancer cells. This is reminiscent of the ability of normal stem cells to self-renew and differentiate. The expression of potential therapeutic targets also differed between the tumorigenic and non-tumorigenic populations. Notch activation promoted the survival of the tumorigenic cells, and a blocking antibody against Notch 4 induced tumorigenic breast cancer cells to undergo apoptosis.

Markers useful for the identification, characterization and, optionally, the enrichment or isolation of tumorigenic cells or cell subpopulations are disclosed.

Markers useful for the identification, characterization and, optionally, the enrichment or isolation of tumorigenic cells or cell subpopulations are disclosed.

Markers useful for the identification, characterization and, optionally, the enrichment or isolation of tumorigenic cells or cell subpopulations are disclosed.

Markers useful for the identification, characterization and, optionally, the enrichment or isolation of tumorigenic cells or cell subpopulations are disclosed.

The present invention is related to the identification of cancer stem cells using the MMTV-Wnt-1 transgenic mouse model. These cancer stem cells have a gene expression signature that allows them to be distinguished from their non-tumorigenic counterparts. Moreover, the gene expression pattern can also predict survival in a diverse group of solid tumors.

The present invention relates generally to a methodology for the isolation, purification and identification of peptide ligands presented by MHC positive cells. In particular, the methodology of the present invention relates to the isolation, purification and identification of these peptide ligands from soluble class I and class II MHC molecules which may be from uninfected, infected, or tumorigenic cells. The methodology of the present invention broadly allows for these peptide ligands and their cognate source proteins thereof to be identified and used as markers for infected versus uninfected cells and / or tumorigenic versus nontumorigenic cells, with said identification being useful for marking or targeting a cell for therapeutic treatment or priming the immune response against infected / tumorigenic cells.

The invention provides the components of in vivo and in vitro systems and methods which use them to study the effects of altered expression of a gene activity, such as the human akt, bcl-2, eIF4E or PTEN activities, on the descendants of stem cells that have been engineered to give rise to hematopoietic tumorigenic or tumor cells, such as lymphomas, with a high frequency. The present invention provides vectors, cells and mammals, and methods which in part depend on such products, useful for understanding tumorigenesis and its treatments, and in particular, for identifying and studying inhibitors and activators associated with tumor cell growth and growth inhibition, cell death through apoptotic pathways, and changes in apoptotic pathway components that affect drug sensitivity and resistance in tumorigenic cells. Methods for identifying molecular targets for drug screening, identifying interacting gene activities, for identifying therapeutic treatments and for identifying candidates for new therapeutic treatments are provided.

The present invention relates generally to a methodology for the isolation, purification and identification of peptide ligands presented by MHC positive cells. In particular, the methodology of the present invention relates to the isolation, purification and identification of these peptide ligands from soluble class I and class II MHC molecules which may be from uninfected, infected, or tumorigenic cells. The methodology of the present invention broadly allows for these peptide ligands and their cognate source proteins thereof to be identified and used as markers for infected versus uninfected cells and / or tumorigenic versus nontumorigenic cells with said identification being useful for marking or targeting a cell for therapeutic treatment or priming the immune response against infected cells.

The present invention is a composition identified as a region of ralA binding protein 1, wherein the region neighbors a membrane-associated portion of the ralA binding protein 1, reduces transport activity and membrane association of the ralA binding protein 1 and kills cells undergoing uncontrolled cell growth in a subject that has cells undergoing uncontrolled cell growth. The region is used to generate medicines that kill malignant cells and tumorigenic cells. Medicines may be in the form of antibodies, si-RNA and small molecules that recognize the region.

The invention relates to the discovery that the dibenzodiazepinone analogues have growth inhibiting activities on tumorigenic cells that are driven by expression of RAS or mutated RAS. Thus the invention includes methods for inhibiting the activity of RAS using dibenzodiazepinone analogues; methods for inhibiting the growth of a RAS driven cancer cell using dibenzodiazepinone analogues; methods for inhibiting the growth of a RAS driven cancer using dibenzodiazepinone analogues; and methods for treating a subject having a RAS driven cancer using dibenzodiazepinone analogues.

Compositions and methods for modifying one or more biologic targets are provided. Suitable targets include cells, DNA, proteins, enzymes, and / or a subject in need thereof. The compositions may exist as a monomer or multimer and are active in a biologic environment with enhanced activity in hypoxic environments and, thus, exhibit improved specificity for hypoxic biologic targets (e.g., tumorigenic cells and those undergoing uncontrolled cell growth). A composition typically comprises a complex with an overall charge of 2+ or greater having at least one ruthenium atom attached to a redox active ligand. The redox active ligand helps maintain separation of more than one ruthenium atom. Suitable compositions may further include a terminal ligand comprising a heterocyclic aromatic compound. When provided to a biologic target, the composition modifies the biologic target and no additional compounds need be provided. Suitable compositions are typically catalytic and regenerative in the presence of a reducing agent.

The present invention is a glutamine analogue which enters the mitochondrion and is subsequently exposed to ionizing radiation. When exposed to ionizing radiation, the present invention damages mitochondrial (as well as other) substructures such as mtDNA, the outer membrane, the inner membrane, cristae, ribosomes, etc., and causes the effective destruction of such mitochondrion. Tumorigenic cells without mitochondria cannot produce the energy they need to subsist and replicate, effectively starving them of energy and causing their destruction.

HA-based functional probes and a multiplexed targeting strategy for detection and isolation of invasive subpopulations in breast cancer cell lines. Methods for using HA metabolism for profiling and sorting breast cancer heterogeneity. As such, HA-based functional probes have appropriate targeting capacity and safety profiles for development as imaging and therapeutic agents for following repair and neoplastic disease processes such as breast cancer.

Markers useful for the identification, characterization and, optionally, the enrichment or isolation of tumorigenic cells or cell subpopulations are disclosed.

The present invention relates generally to a methodology for the isolation, purification and identification of peptide ligands presented by MHC positive cells. In particular, the methodology of the present invention relates to the isolation, purification and identification of these peptide ligands from soluble class I and class 11 MHC molecules which may be from uninfected, infected, or tumorigenic cells. The methodology of the present invention broadly allows for these peptide ligands and their cognate source proteins thereof to be identified and used as markers for infected versus uninfected cells and / or tumorigenic versus nontumorigenic cells, with said identification being useful for marking or targeting a cell for therapeutic treatment or priming the immune response against infected cells.

The invention discloses a non-tumorigenic MDCK cell line used for amplifying influenza viruses and a screening method thereof. The cell line is MDCK-2B2 with an accession number of CCTCC 201323. The invention provides the non-tumorigenic MDCK-2B2 cell line and a subclone cell line thereof; and the cell line can grow into adherent cells, and / or has an epithelioid form and / or can support duplication of a variety of viruses, and is capable of amplifying viruses with high titers. The invention also provides the screening method for the non-tumorigenic cell line. The growth speed and morphologic changes of cells can be used to assist in determination of tumorigenicity; i.e., simple-pore cells with a slow growth speed have substantially reduced tumorigenicity, and occurrence of giant cells enables tumorigenicity to be substantially increased; during large-scale screening of non-tumorigenic cell lines, such an auxiliary determination method can shorten time and save cost.

The present invention describes methods for long-term culturing of ERpos cells, cell lines, and / or cell strains with exetended lifespan and / or cell strain as well as culture medium compositions. The invention further describes methods for isolating cells which may be used as starting point for long-term culturing of ERpos cells, cell lines, and / or cell strains with extended lifespan and / or cell strain. The invention further discloses various methods for generating ERpos tumorigenic cells, cell lines, and / or cell strains with extended lifespan and / or cell strain as well as various assays for their use.

The present invention relates to diagnosing abnormal cell proliferation in biological samples and screening for drugs which inhibit, reduce or abolish cell growth, especially tumorigenic cell growth, by detecting a phosphovariant isoform of a guanine nucleotide exchange factor biomarker, such as the novel GEF-H1S.

The present invention provides a human CD16+ natural killer cell line. This human CD16+ natural killer cell line does not include synthetic, genetically modified or deliberately delivered polynucleotide encoding the CD16 receptor and is a non-tumorigenic cell line. Therefore, this human CD16+ natural killer cell line might provide considerable long-term safety for disease treatment.

The present invention provides methods and compositions for the diagnosis and treatment of cells lacking normal growth arresting characteristic. The present invention demonstrates that many tumor cells lack normal cell surface α-dystroglycan and thereby lack dystroglycan function. Dystroglycan can be lost from the cell surface by proteolytic shedding of a fragment of α-dystroglycan into the surrounding medium. Upon restoration of dystroglycan function and over-expression of the dystroglycan gene, the once tumorigenic cells revert to non-tumorigenic cells which polarize and arrest cell growth in the presence of basement membrane proteins, demonstrating that dystroglycan functions as a tumor marker and suppressor.