xenotransplantation$506905$ - traduzione in spagnolo
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xenotransplantation$506905$ - traduzione in spagnolo

TRANSPLANTATION OF CELLS OR TISSUE ACROSS SPECIES
Heterotransplant; Xenograft; Heterograft; Xenotransplant; Xenozoonosis; Xenografts; Heterologous graft; Trans-species organ transplants; Xenotransplants; Organ xenotransplantation; Xenographic; Xenosis; Xenogeneic; Transplantation, heterologous; Porcine Endogenous Retro-Viruses; Porcine endogenous retroviruses; PERVS; Pig organ transplants; David Bennett Sr.

xenotransplantation      
n. xenotransplantación, implantación de órganos o y tejidos de animalos dentro de cuerpos humanos

Definizione

xenogeneic
[?z?n?(?)d??'ni:?k, -'ne??k]
¦ adjective Physiology relating to or denoting immunologically incompatible tissues which belong to individuals of different species.
Origin
1960s: from xeno- + Gk genea 'race, stock' + -ic.

Wikipedia

Xenotransplantation

Xenotransplantation (xenos- from the Greek meaning "foreign" or strange), or heterologous transplant, is the transplantation of living cells, tissues or organs from one species to another. Such cells, tissues or organs are called xenografts or xenotransplants. It is contrasted with allotransplantation (from other individual of same species), syngeneic transplantation or isotransplantation (grafts transplanted between two genetically identical individuals of the same species) and autotransplantation (from one part of the body to another in the same person). Xenotransplantation is an artificial method of creating an animal-human chimera, that is, a human with a subset of animal cells. In contrast, an individual where each cell contains genetic material from a human and an animal is called a human–animal hybrid.

Patient derived xenografts are created by xenotransplantation of human tumor cells into immunocompromised mice, and is a research technique frequently used in pre-clinical oncology research.

Human xenotransplantation offers a potential treatment for end-stage organ failure, a significant health problem in parts of the industrialized world. It also raises many novel medical, legal and ethical issues. A continuing concern is that many animals, such as pigs, have a shorter lifespan than humans, meaning that their tissues age at a quicker rate. (Pigs have a maximum life span of about 27 years.) Disease transmission (xenozoonosis) and permanent alteration to the genetic code of animals are also causes for concern. Similarly to objections to animal testing, animal rights activists have also objected to xenotransplantation on ethical grounds. A few temporarily successful cases of xenotransplantation are published.

It is common for patients and physicians to use the term "allograft" imprecisely to refer to either allograft (human-to-human) or xenograft (animal-to-human), but it is helpful scientifically (for those searching or reading the scientific literature) to maintain the more precise distinction in usage.

Bioprosthetic artificial heart valves are generally pig or bovine-derived, but the cells are killed by glutaraldehyde treatment before insertion, therefore technically not fulfilling the WHO definition of xenotransplantation of being live cells.