This website uses cookies to ensure you have the best experience. Learn more

Human Cells Essay

298 words - 2 pages

Pigs grown from fetuses into which human stem cells were injected have surprised scientists by having cells in which the DNA from the two species is mixed at the most intimate level.It is the first time such fused cells have been seen in living creatures. The discovery could have serious implications for xenotransplantation - the use of animal tissue and ...view middle of the document...

"What we found was completely unexpected. We found that the human and pig cells had totally fused in the animals' bodies," said Jeffrey Platt, director of the Mayo Clinic Transplantation Biology Program.Nuclear mixThe hybrid cells had both human and pig surface markers. But, most surprisingly, the hybrid cell nuclei were found to have chromosomal DNA that contained both human and pig genes. The researchers found that about 60 per cent of the animals' non-pig cells were hybrids, with the remainder being fully human.Importantly, the team also found that porcine endogenous retrovirus (PERV), which is present in almost all pigs, was also present in the hybrid cells. Previous laboratory work has shown that while PERVs in pig cells cannot infect human cells, those in hybrid cells can. The discovery therefore suggests a serious potential problem for xenotransplantation.

Find Another Essay On Human Cells

Summary of: Apoptosis in Human Hepatoma HepG2 Cells Induced by Corn Peptides and Its Anti-tumor Efficacy in H22 Tumor Bearing Mice

1532 words - 7 pages corn proteins were prepared by separating them out of corn gluten meal using an ultra-filtration method. The CPs were lyophilized (sterilized powder) for use in the mouse experiment. BALB/c mice were used to grow H22, a type of liver tumor analogous to the human liver tumor HepG2. The BALB/c mice are a line of inbred mice that are not naturally prone to tumors (Festing 1998). The H22 cells were injected into the study mice through the right armpit

Growth modulatory effect of Costus speciosus rhizome extracts on MCF-7 human breast cancer cells

841 words - 4 pages al., 1997). The importance of plant derived drugs and its implication in curing disease has made the interest in the identification of new plant sources for the management of cancer. Cell apoptosis The in vitro viability assay of rhizome extracts of C. speciosus on MCF-7 cells proved a dose-dependent decrease in the percentage of cell’s viability in all the extracts treated cells when compared to the control [Fig 1]. The hexane extract showed a

Stem Cells


Adult and Embryonic Stem Cells

818 words - 4 pages cell types. Their pluripotency is lost and the stem cells become specialized. When the egg is fertilized, it turns into a Totipotent zygote. “This totipotent fertilized egg has the potential to give rise to virtually all human cells, such as nerve or heart.” these totipotent cells in the zygote then duplicate and become more specialized into pluripotent stem cells.The difference between totipotent stem cells and pluripotent stem cells is that

The Stem Cell: The Source For All of Them

1799 words - 8 pages structures in our body such as blood cells or muscle cells. Stem cells do not have this intrinsic programming. They can therefore become any type of cell. When a sperm and egg combine to create a zygote, the zygote rapidly divides which will eventually develop into an embryo and, of course, eventually a human being. The cells that the zygote divides into are the first of these stem cells and develop into the cells that make up the body. When a

Understanding Stem Cell Research

1345 words - 6 pages condition. (Kwan) These researchers were studying stem cell rejection in the mice, however, the researchers discovered that two weeks after injecting “human neural stem cells… the mice had regained their ability to walk.” (Kwan) The researchers have discovered that the stem cells repressed the disease from preventing and regenerated myelin and repaired damage done by the disease. This technology is the future of the medical industry; and the research is

Stem Cells

611 words - 2 pages Stem cells are cells that have the potential to transform into any other cell in the human body. These cells are also capable of dividing them selves to make multiple copies; the stem cells taken from the embryos can turn into any one of the 300 cells types of cells in the human body. These cells are so versatile that they can be used to repair damaged tissues or cure diseases like the Parkinson's disease. Stem cells can also be used to test new

Adult Stem Cells: The Way to Save Lives

959 words - 4 pages ? Should they be able to use a sperm and an egg to create the cells in a lab that do not have any chances of becoming human life? That’s for you students to decide. Why are stem cells important? Why are they necessary for research? As I said earlier, stem cells have the capability to develop into astronomical amounts of cells that may become specialized. If they can develop into astronomical amounts of cells, that means they divide just as

Stem Cells May Have The Answer to Cure Cancer

1356 words - 6 pages also fix defects in the human body like blindness. These cells can do so by a process called differentiation, where unspecialized stem cells produce particular cells needed in the body such as muscle, red blood or brain cells. Stem cells can continue to proliferate for long periods of time due to their long-term self-renewal. There are two types of stem cells that scientists usually study: embryonic stem cells and somatic stem cells

Exploring Stem Cells

1339 words - 5 pages and EG cells from the early stage embryo and cadaver fetal tissue that offer scientists the possibility to generate more specialized cells or tissues, which could allow the generation of new cells used to treat injuries or diseases like Alzheimer’s, Parkinson’s, heart disease and kidney failure. Also, scientists believe these cells could be the means for understanding the earliest stages for human development and important

Stems Cells and Alzeihmer's

598 words - 2 pages cells in the human body, including red blood cells, platelets, and white blood cells. Sources of hematopoietic stem cells include umbilical cord blood, bone marrow, peripheral blood and embryos. Stem cells divide and when a stem cell divides, each new cell has the potential to either remain a stem cell or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell, or a brain cell. If stem cells could be

Similar Essays

Human Embryonic Stem Cells And Induced Pluripotent Cells

1136 words - 5 pages Human Embryonic Stem cells and Induced Pluripotent Stem Cells are two modern methods of research; and treatment being aimed at the treatment of cancer, and many degenerative and genetic diseases. Stem cells are cells with the ability to develop into a cell of a different type, some types of stem cells are able to differentiate or change into a cell which is specific and functional to a specific tissue or organ system. This unique ability is

In Vitro Model Of Human Amniotic Stem Cell Differentiation To Smooth Muscle Cells

1971 words - 8 pages Introduction The mechanism of the differentiation of stem cells (SCs) into smooth muscle cells (SMCs) is not yet fully understood, although recent research in this area has made significant strides. In previous studies, human embryonic mesenchymal stem cells (hEMSCs) were shown to differentiate by induction with transforming growth factor beta (TGF-Β) through Smad and serum response factor (SRF), p38 mitogen-activated protein kinase

Research Into Human Cells Has Vast Implications. This Essay Discribes The Effect Stem Cell Research Has On Society

1207 words - 5 pages In a dramatic scientific first, two independent research teams announced in November 1998 that they had successfully isolated and grown a special kind of cell with the potential to develop into virtually any kind of human tissue.The breakthrough was widely hailed as a pioneering event with vast potential for biological research. Many experts believe the cells, known as embryonic stem cells, could lead to new methods of drug discovery, improve

Biology: Echinacea Extracts Can Increase Gene Expression And Protein Expression Of Apo A I In Human Intestinal Cells

2060 words - 9 pages In this study, human intestinal cells (Caco-2 cells) were incubated without or with 100µl /ml Echinacea extracts for 5 hours, after which total RNA was extracted and assayed using reverse transcription-PCR. The results from reverse transcript-PCR suggest that Echinacea extracts are capable of up-regulating the level of ApoA-I gene expression. Caco-2 cells incubated with Echinacea extracts exhibited approximately a 17-fold increase in the level