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Tumor in Biological Definition

Apoptosis

... 3.1 Apoptosis and the role of interferon in tumor suppression 3.2 Cancer and defective apoptotic pathways 3.3 Role of apoptotic products in tumor immunity 4 History and highlights in ... faster than they die, effectively developing a tumor . The cells are dividing slower than they die, ...

Cancer

... of cells can lead to either a benign tumor or a malignant tumor (cancer). Benign tumors do not spread to other ... Local symptoms : unusual swelling ( tumor in Latin means swelling), hemorrhage ...

Growth curve

... chemotherapy is related to the rate of tumor growth before treatment. Tumors that grow rapidly ... replicate their DNA and divide. A rapidly growing tumor will have more actively dividing cells and more ... drugs. In the example shown in Figure 2, a tumor is found after the cell growth rate has slowed. ...

Oncogene

... gene that can cause a cell to develop into a tumor cell, possibly resulting in cancer . ... Upon activation , it (or its product) becomes a tumor inducing agent, an oncogene. Activation ... factors . Related articles tumor suppressor gene Apoptosis ...

Tumor

... for the main article about malignant tumors. tumor ( American English ) or tumour ( British ... and is sometimes still used with that meaning. tumor meaning swelling is one of the five classical ... tubular adenoma , renal cell carcinoma (Grawitz tumor ) hepatocytes: hepatocellular adenoma , ...

Magnetic resonance imaging

... practice, MRI is used to distinguish pathologic tissue (such as a brain tumor ) from normal tissue. One of the advantages of an MRI scan is that, ... system then computes the precise location, shape and orientation of the tumor mass, correcting for any spatial distortion inherent in the system. The ...

Blood

... elements to tissues and to remove waste products (such as carbon dioxide and lactic acid ). Blood also enables cells ( leukocytes , abnormal tumor cells) and different substances ( amino acids , lipids , hormones ) to be transported between tissues and organs. Problems with blood composition ...

Cytotoxic T cell

... its surface antigen receptors that can bind to fragments of antigens displayed by the Class I MHC molecules of virus infected somatic cells and tumor cells. Once activated by a MHC-antigen complex, T C cells release the protein perforin , which forms pores in the target cell's plasma ...

Morphogenesis

... entire organisms and the positions of the various specialized cell types. Cell growth and differentiation can take place in cell culture or inside of tumor cell masses without the normal morphogenesis that is seen in an intact organism. The study of morphogenesis involves an attempt to understand the ...

Infertility

... Anovulation Diminished ovarian reserve Luteal dysfunction Premature menopause Gonadal dysgenesis ( Turner syndrome ) Ovarian tumor Tubal/peritoneal factors Endometriosis Pelvic adhesions Pelvic inflammatory disease (PID, usually due to chlamydia ) Tubal ...

Kidney

... the urine . Other frequent features of the nephrotic syndrome include swelling, low serum albumin, and high cholesterol. kidney tumors Wilms tumor Renal cell carcinoma Renal failure (acute and chronic) Glomerulonephritis Diabetic nephropathy Lupus nephritis Dialysis ...

Monoclonal antibody

... one removes B-cells from the spleen of an animal that has been challenged with the antigen. These B-cells are then fused with myeloma tumor cells that can grow indefinitely in culture (myeloma is a B-cell cancer). This fusion is done by making the cell membranes more permeable. The ...

Morphogenesis

... entire organisms and the positions of the various specialized cell types. Cell growth and differentiation can take place in cell culture or inside of tumor cell masses without the normal morphogenesis that is seen in an intact organism. The study of morphogenesis involves an attempt to understand the ...

Phosphorylation

... specific protein kinases , whereas phosphatases de phosphorylate. An example of the important role that phosphorylation plays is the p53 tumor suppressor gene , which—when active—stimulates transcription of gene that suppress the cell cycle , even to the extent that it ...

Stem cell

... into a cancer-killing agent. Within days the adult stem cells had migrated into the cancerous area and the injected substance was able to reduce tumor mass by 80 percent. Spinal cord Embryonic stem cells switched to neurons In Jan. 2005, using stem cells science made major progress in ...

T cell

... activation, however they are especially important in cell-mediated immunity , that is the defense against pathogenic organisms inside body cells, tumor cells and is also involved in rejection reactions . CD4 and CD8 refer to the characteristic antigens on the surface of the different sub-types ...
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