生物技術(shù)藥物,12。stemcell-wenkub
2023-01-23 02:16:49 本頁面
【正文】 基因 克隆 胚胎 轉(zhuǎn)基因動(dòng)物 克隆動(dòng)物 治療性克隆研究 胚胎生物學(xué) 干細(xì)胞生物學(xué) 分子生物學(xué) 發(fā)育生物學(xué) 組織工程學(xué) 遺傳學(xué) 免疫學(xué) 器官移植等 干細(xì)胞生物技術(shù) 交大的優(yōu)勢(shì)： 生農(nóng)醫(yī)藥蓄勢(shì)待發(fā)。 ?北京大學(xué)干細(xì)胞研究中心。 中國在干細(xì)胞生物技術(shù)領(lǐng)域的優(yōu)勢(shì) ?國家干細(xì)胞工程技術(shù)研究中心成立投入使用。 ?政府的支持，反對(duì)生殖性克隆人，允許治療性克隆研究 。 ?美國治療性克隆不能得到聯(lián)邦政府資助。 provide unlimited source of adult cells like bones, muscle, liver or blood cells. ? Originally produced to treat infertility and surplus embryos were discarded. ? Embryos created using IVF then tested using DNA analysis when only 3 days old and only a few cells in size. Embryonic Stem Cells: Researchers extract stem cells from a 57 days old blastocyst. Stem cells can divide in culture to form more of their own kind, thereby creating a stem cell line. The research aims to induce these cells to generate healthy tissue needed by patients. Two Sources of Embryonic Stem Cells 1. Excess fertilized eggs from IVF (invitro fertilization) clinics 2. Therapeutic cloning (somatic cell nuclear transfer) Tens of thousands of frozen embryos are routinely destroyed when couples finish their treatment. These surplus embryos can be used to produce stem cells. Regenerative medical research aims to develop these cells into new, healthy tissue to heal severe illnesses. Somatic Cell Nuclear Transfer The nucleus of a donated egg is removed and replaced with the nucleus of a mature, somatic cell (a skin cell, for example). No sperm is involved in this process, and no embryo is created to be implanted in a woman?s womb. The resulting stem cells can potentially develop into specialized cells that are useful for treating severe illnesses. International Legislation ? Embryonic Stem cell research is highly controversial not only in the United States but worldwide. ? In the past two years, many nations have begun to tolerate, if not to support, the research. ? In the fall of 2022, the United Nations will consider enacting a global ban on both therapeutic and reproductive cloning. Stem Cell Research Worldwide United Nations ? In November 2022, a mittee of the General Assembly defeated by only one vote a proposal to ban therapeutic cloning research. The United States delegation strongly supported this proposal.
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1