줄기세포배양 기술로 심봤다 150년 수령 6억짜리
페이지 정보
본문
줄기세포는 분화되지 않은 세포로, 신체의 다양한 세포 유형으로 분화될 수 있는 능력을 가지고 있습니다. 크게 배아줄기세포와 성체줄기세포로 나눌 수 있습니다. 배아줄기세포는 수정란에서 유래하며, 거의 모든 종류의 세포로 분화할 수 있는 만능성을 가지고 있습니다. 성체줄기세포는 이미 특정 조직에 존재하는 줄기세포로, 해당 조직이나 유사한 조직으로만 분화할 수 있는 다분화능을 가지고 있습니다.
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산삼
이번에 대량 생산에 성공한 희귀 산삼은 2022년 11월 전남에서 발견한 세계적으로 유례없는 크기의 산삼이다. 수령만 150년으로 감정가는 약 6억 8000만 원에 달한다. 특히 다양한 생물학적 가치를 지닌 것으로 알려졌다.2일 전
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인간 배아줄기세포
https://ko.wikipedia.org/wiki/%EB%B0%B0%EC%95%84%EC%A4%84%EA%B8%B0%EC%84%B8%ED%8F%AC
배아줄기세포(Embryonic stem cell, ES cells)는 배반포의 내부세포괴에서 유래한 만능성 줄기세포로, 초기 착상 전 배아이다.[1][2] 수정 후 인간의 배아는 4-5달 후 배반포를 형성하며, 그 때 배아는 50-150개의 세포로 구성된다. 배반포의 안쪽에는 내세포괴라고 하는 세포들의 덩어리가 있는데, 이 세포들은 세포분열과 분화를 거쳐 배아를 형성하고, 배아는 임신기간을 거치면서 하나의 개체로 발생하게 된다. 이 과정에서 내세포괴의 세포들이 혈액, 뼈, 피부, 간 등 한 개체에 있는 모든 조직의 세포로 분화하게 된다. 때문에 배아 단계에서 추출한 줄기세포는 뼈, 간, 심장 등 장기로 발전할 수 있는 만능세포라고 불린다.
배아줄기세포로 각종 난치병 치료에 쓰이는 장기 세포를 시험관에서 무한정 만들어 이식할 수 있다면 인류의 꿈인 무병장수가 실현될 수 있다. 기증된 장기가 부족한 현실에서 꼭 필요한 기술이다. 현재 백혈병, 파킨슨병, 당뇨병 등에 걸린 환자에게 장애가 생긴 세포를 대신하는 정상 세포를 외부에서 배양, 주입하여 치료하려는 시도가 행해지고 있다.
쥐의 배아줄기세포는 8마이크로미터에 가깝고 사람의 배아줄기세포는 약 14마이크로미터이다
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줄기세포의 종류:
배아줄기세포 (Embryonic Stem Cells):
수정란에서 유래하며, 신체의 모든 종류의 세포로 분화할 수 있는 만능성을 가지고 있습니다.
성체줄기세포 (Adult Stem Cells):
이미 특정 조직에 존재하는 줄기세포로, 해당 조직이나 유사한 조직으로만 분화할 수 있습니다. 예를 들어, 조혈모세포는 혈액 세포로 분화하고, 지방줄기세포는 지방 세포 등으로 분화합니다.
유도만능줄기세포 (Induced Pluripotent Stem Cells, iPS Cells):
성체세포를 역분화시켜 배아줄기세포와 유사한 상태로 만든 줄기세포입니다. 역분화 과정에서 특정 유전자를 조작하여 분화된 세포를 줄기세포처럼 만들 수 있습니다.
줄기세포의 특징:
자기 복제 능력:
줄기세포는 분화하지 않은 상태로 자기 자신을 복제할 수 있습니다.
분화 능력:
줄기세포는 특정 환경에서 다양한 종류의 세포로 분화할 수 있습니다.
재생 의학의 핵심:
줄기세포는 손상된 조직이나 장기를 재생하는 데 사용될 수 있습니다.
줄기세포 연구 및 치료:
줄기세포 연구는 재생 의학 분야에서 활발히 진행되고 있으며, 난치병 치료에 대한 희망을 주고 있습니다. 특히, 유도만능줄기세포는 면역 거부 반응의 위험을 줄이면서 줄기세포를 확보할 수 있다는 점에서 큰 기대를 받고 있습니다.
더 자세한 정보는 다음을 참조하세요:
줄기세포 - 위키백과: Wikipedia
배아줄기세포 - 위키백과: Wikipedia
유도만능줄기세포(iPS)및 유전자 편집 - Cyagen Korea: Cyagen Korea
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줄기세포배양 기술로 심봤다 150년 수령 6억짜리
https://www.google.com/search?q=%EC%A4%84%EA%B8%B0%EC%84%B8%ED%8F%AC%EB%B0%B0%EC%96%91+%EA%B8%B0%EC%88%A0%EB%A1%9C+%EC%8B%AC%EB%B4%A4%EB%8B%A4+150%EB%85%84+%EC%88%98%EB%A0%B9+6%EC%96%B5%EC%A7%9C%EB%A6%AC&sca_esv=5da2b0c0536aa051&sxsrf=AE3TifNkvNN_f71HSr19ph5JUrtnSbPD4Q%3A1751577845767&ei=9fRmaNzGLqTJ0PEPutXu-Qc&ved=0ahUKEwiclaz6z6GOAxWkJDQIHbqqO38Q4dUDCBA&uact=5&oq=%EC%A4%84%EA%B8%B0%EC%84%B8%ED%8F%AC%EB%B0%B0%EC%96%91+%EA%B8%B0%EC%88%A0%EB%A1%9C+%EC%8B%AC%EB%B4%A4%EB%8B%A4+150%EB%85%84+%EC%88%98%EB%A0%B9+6%EC%96%B5%EC%A7%9C%EB%A6%AC&gs_lp=Egxnd3Mtd2l6LXNlcnAiP-ykhOq4sOyEuO2PrOuwsOyWkSDquLDsiKDroZwg7Ius67Sk64ukIDE1MOuFhCDsiJjroLkgNuyWteynnOumrDIFEAAY7wUyBRAAGO8FMgUQABjvBTIFEAAY7wUyBRAAGO8FSNySA1AAWLL8AnAIeACQAQCYAcQBoAHhJKoBBTQyLjEyuAEDyAEA-AEBmAI-oALXKsICChAjGIAEGCcYigXCAgQQIxgnwgIFEAAYgATCAgUQLhiABMICDhAuGIAEGMcBGI4FGK8BwgIKEAAYgAQYFBiHAsICChAAGIAEGEMYigXCAgoQLhiABBhDGIoFwgIEEAAYHsICCBAAGKIEGIkFwgIIEAAYgAQYogTCAgUQIRigAcICBxAAGIAEGA3CAgcQIRigARgKmAMAkgcHNDIuMTkuMaAH8J8CsgcHMzQuMTkuMbgH3CnCBwswLjEuMjcuMjcuN8gH7gQ&sclient=gws-wiz-serp
Plant Stem Cell
https://en.wikipedia.org/wiki/Plant_stem_cell
Plant stem cells are innately undifferentiated cells located in the meristems of plants.[1] Plant stem cells serve as the origin of plant vitality, as they maintain themselves while providing a steady supply of precursor cells to form differentiated tissues and organs in plants.[2][failed verification] Two distinct areas of stem cells are recognised: the apical meristem and the lateral meristem.
Plant stem cells are characterized by two distinctive properties, which are: the ability to create all differentiated cell types and the ability to self-renew such that the number of stem cells is maintained.[3] Plant stem cells never undergo aging process but immortally give rise to new specialized and unspecialized cells, and they have the potential to grow into any organ, tissue, or cell in the body.[2][failed verification] Thus they are totipotent cells equipped with regenerative powers that facilitate plant growth and production of new organs throughout lifetime.[1][failed verification]
Unlike animals, plants are immobile. As plants cannot escape from danger by taking motion, they need a special mechanism to withstand various and sometimes unforeseen environmental stress. Here, what empowers them to withstand harsh external influence and preserve life is stem cells. In fact, plants comprise the oldest and the largest living organisms on earth, including Bristlecone Pines in California, U.S. (4,842 years old), and the Giant Sequoia in mountainous regions of California, U.S. (87 meters in height and 2,000 tons in weight).[4] This is possible because they have a modular body plan that enables them to survive substantial damage by initiating continuous and repetitive formation of new structures and organs such as leaves and flowers.[1]
Plant stem cells are also characterized by their location in specialized structures called meristematic tissues, which are located in root apical meristem (RAM), shoot apical meristem (SAM), and vascular system ((pro)cambium or vascular meristem.)[5]
Research and development
Traditionally, plant stem cells were thought to only exist in SAM and RAM and studies were conducted based on this assumption. However, recent studies have indicated that (pro)cambium also serves as a niche for plant stem cells: "Procambium cells fulfill the criteria for being stem cells since they have the capacity for long-term self renewal and being able to differentiate into one or more specialized cell types."[6][failed verification]
Cambium is a type of meristem with thin walls which minutely exist in small populations within a plant. Due to this structural characteristic, once physical force is applied to it, it is easily damaged in the very process of isolation, losing its stem cell characteristics. Despite 160 years of biological effort to isolate and retrieve plant stem cells, none succeeded in the isolation due to the distinct structural characteristics of plant stem cell: "[t]he cambium consists of a few layers of narrow elongated, thin-walled cells, easily damaged during sampling." This highly vulnerable feature has made studies on cambial structure and ultrastructure difficult to achieve with conventional methods. Thus failure to isolate plant stem cells from meristematic tissues prompted scientists to administer plant cell culture by using callus (dedifferentiated cells) as an alternative to plant stem cells.
Callus, or dedifferentiated cells, are somatic cells that undergo dedifferentiation to give rise to totipotent embryogenic cells, which temporarily gains the ability to proliferate and/or regenerate an embryo. Since embryogenic cells were considered totipotent cells based on their ability to regenerate or develop into an embryo under given conditions, dedifferentiated cells were generally regarded as stem cells of plant: "…we propose to extend the concept of stem cells to include embryogenic stem cells that arise from plant somatic cells. We examine the cellular, physiological and molecular similarities and differences between plant meristematic stem cells and embryogenic stem cells originating directly from single somatic cells."
Plant stem cell vs. callus
Despite that callus exhibits a number of stem cell-like properties for a temporary period and that it has been cultured for useful plant compounds as an alternative source of plant stem cell, callus and plant stem cell are fundamentally different from each other. Callus is similar to plant stem cell in its ability to differentiate, but the two are different in their origin. While plant stem cell exists in the meristematic tissues of plant, callus is obtained as a temporary response to cure wounds in somatic cell.
Moreover, callus undergoes dedifferentiation as differentiated cells acquire ability to differentiate; but genetic variation is inevitable in the process because the cells consist of somatic undifferentiated cells from an adult subject plant. Unlike true stem cells, callus is heterogeneous. Due to this reason, continuous and stable cell division of callus is difficult. Hence a plant stem cell originated from cambium is an immortal cell while that from callus is a temporarily dediffertiated cell obtained from stimulating the somatic cell.
Furthermore, the ability to differentiate and proliferate is different that differences between plant stem cell and callus are prevalent in culture and research. Only plant stem cells embedded in meristems can divide and give rise to cells that differentiate while giving rise to new stem cells. These immortal cells divide infinitely.
Bioprocess innovation
Plant cells are cultured to acquire plant useful compounds. However cell cultures are often hindered by various factors especially if cell culture continues long-term. However, strong vitality and structural characteristics of plant stem cell overcome previous drawbacks to plant cell culture. Thus plant stem cell culture is the most ideal and productive method of cell culture and phytochemical production as cells are successfully mass cultured while maintaining quality.
Further applications
Numerous medicines, perfumes, pigments, antimicrobials, and insecticides are derived from plant natural products. Cultured Cambial Meristematic Cells (CMC) may provide a cost-effective, environmentally friendly, and sustainable source of important natural products, including paclitaxel. Unlike plant cultivation, this approach is not subject to the unpredictability caused by variation in climatic conditions or political instability in certain parts of the world. Also, CMCs from reference specifies may also provide an important biological tool to explore plant stem cell function.
In 2010, researchers from the Plant Stem Cell Institute [ko] (formerly Unhwa Institute of Science and Technology) presented their data to the world via Nature Biotechnology. Their research demonstrated the world's first cambial meristematic cell isolation. Due to the valuable and beneficial compounds for human health (i.e. paclitaxel) which are secreted by the CMC's, this technology is considered a serious breakthrough in plant biotechnology.[7][non-primary source needed]
See also
Callus (cell biology)
Stem cell
References
Weigel D, Jürgens G (February 2002). "Stem cells that make stems". Nature. 415 (6873): 751–4. Bibcode:2002Natur.415..751W. doi:10.1038/415751a. PMID 11845197. S2CID 9032410.
Sablowski R (November 2004). "Plant and animal stem cells: conceptually similar, molecularly distinct?". Trends in Cell Biology. 14 (11): 605–11. doi:10.1016/j.tcb.2004.09.011. PMID 15519849.
Scheres B (August 2005). "Stem cells: a plant biology perspective". Cell. 122 (4): 499–504. doi:10.1016/j.cell.2005.08.006. hdl:1874/21117. PMID 16145811. S2CID 1705295.
"Gymnosperm Database". Pinus longaeva. 15 March 2007. Retrieved 2006-07-25.
Hirakawa Y, Shinohara H, Kondo Y, Inoue A, Nakanomyo I, Ogawa M, Sawa S, Ohashi-Ito K, Matsubayashi Y, Fukuda H (September 2008). "Non-cell-autonomous control of vascular stem cell fate by a CLE peptide/receptor system". Proceedings of the National Academy of Sciences of the United States of America. 105 (39): 15208–13. Bibcode:2008PNAS..10515208H. doi:10.1073/pnas.0808444105. PMC 2567516. PMID 18812507.
Alison MR, Poulsom R, Forbes S, Wright NA (July 2002). "An introduction to stem cells". The Journal of Pathology. 197 (4): 419–23. doi:10.1002/path.1187. PMID 12115858.
Lee EK, Jin YW, Park JH, Yoo YM, Hong SM, Amir R, Yan Z, Kwon E, Elfick A, Tomlinson S, Halbritter F, Waibel T, Yun BW, Loake GJ (November 2010). "Cultured cambial meristematic cells as a source of plant natural products". Nature Biotechnology. 28 (11): 1213–7. doi:10.1038/nbt.1693. PMID 20972422. S2CID 205274906.
Further reading
Singh MB, Bhalla PL (May 2006). "Plant stem cells carve their own niche". Trends in Plant Science. 11 (5): 241–6. Bibcode:2006TPS....11..241S. doi:10.1016/j.tplants.2006.03.004. PMID 16616580.
Weigel D, Jürgens G (February 2002). "Stem cells that make stems". Nature. 415 (6873): 751–4. Bibcode:2002Natur.415..751W. doi:10.1038/415751a. PMID 11845197. S2CID 9032410.
Ivanov VB (October 2007). "Oxidative stress and formation and maintenance of root stem cells". Biochemistry. Biokhimiia. 72 (10): 1110–4. doi:10.1134/s0006297907100082. PMID 18021068. S2CID 14674628.
Müller B, Sheen J (June 2008). "Cytokinin and auxin interaction in root stem-cell specification during early embryogenesis". Nature. 453 (7198): 1094–7. Bibcode:2008Natur.453.1094M. doi:10.1038/nature06943. PMC 2601652. PMID 18463635.
Neumüller RA, Betschinger J, Fischer A, Bushati N, Poernbacher I, Mechtler K, Cohen SM, Knoblich JA (July 2008). "Mei-P26 regulates microRNAs and cell growth in the Drosophila ovarian stem cell lineage". Nature. 454 (7201): 241–5. Bibcode:2008Natur.454..241N. doi:10.1038/nature07014. PMC 2988194. PMID 18528333.
Scheres B (May 2007). "Stem-cell niches: nursery rhymes across kingdoms". Nature Reviews. Molecular Cell Biology. 8 (5): 345–54. doi:10.1038/nrm2164. PMID 17450175. S2CID 34588810.
Eric, Simon; Campbell, Neil; Reece, Jane (2007). Essential Biology with Physiology. San Francisco, CA: Pearson Benjamin Cummins. ISBN 9780805368413.
Staveley BE (10 December 2008). "Plant Development". Department of Biology. Memorial University of Newfoundland. Archived from the original on 30 November 2012. Retrieved 8 September 2017.
Categories: Plant physiologyStem cells
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STEM CELL https://en.wikipedia.org/wiki/Stem_cell
In multicellular organisms, stem cells are undifferentiated or partially differentiated cells that can change into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage.[1] They are found in both embryonic and adult organisms, but they have slightly different properties in each. They are usually distinguished from progenitor cells, which cannot divide indefinitely, and precursor or blast cells, which are usually committed to differentiating into one cell type.
In mammals, roughly 50 to 150 cells make up the inner cell mass during the blastocyst stage of embryonic development, around days 5–14. These have stem-cell capability. In vivo, they eventually differentiate into all of the body's cell types (making them pluripotent). This process starts with the differentiation into the three germ layers – the ectoderm, mesoderm and endoderm – at the gastrulation stage. However, when they are isolated and cultured in vitro, they can be kept in the stem-cell stage and are known as embryonic stem cells (ESCs).
Adult stem cells are found in a few select locations in the body, known as niches, such as those in the bone marrow or gonads. They exist to replenish rapidly lost cell types and are multipotent or unipotent, meaning they only differentiate into a few cell types or one type of cell. In mammals, they include, among others, hematopoietic stem cells, which replenish blood and immune cells, basal cells, which maintain the skin epithelium, and mesenchymal stem cells, which maintain bone, cartilage, muscle and fat cells. Adult stem cells are a small minority of cells; they are vastly outnumbered by the progenitor cells and terminally differentiated cells that they differentiate into.[1]
Research into stem cells grew out of findings by Canadian biologists Ernest McCulloch, James Till and Andrew J. Becker at the University of Toronto and the Ontario Cancer Institute in the 1960s.[2][3] As of 2016, the only established medical therapy using stem cells is hematopoietic stem cell transplantation,[4] first performed in 1958 by French oncologist Georges Mathé. Since 1998 however, it has been possible to culture and differentiate human embryonic stem cells (in stem-cell lines). The process of isolating these cells has been controversial, because it typically results in the destruction of the embryo. Sources for isolating ESCs have been restricted in some European countries and Canada, but others such as the UK and China have promoted the research.[5] Somatic cell nuclear transfer is a cloning method that can be used to create a cloned embryo for the use of its embryonic stem cells in stem cell therapy.[6] In 2006, a Japanese team led by Shinya Yamanaka discovered a method to convert mature body cells back into stem cells. These were termed induced pluripotent stem cells (iPSCs).[7]
History
The term stem cell was coined by Theodor Boveri and Valentin Haecker in late 19th century.[8] Pioneering works in theory of blood stem cell were conducted in the beginning of 20th century by Artur Pappenheim, Alexander A. Maximow, Franz Ernst Christian Neumann.[8]
The key properties of a stem cell were first defined by Ernest McCulloch and James Till at the University of Toronto and the Ontario Cancer Institute in the early 1960s. They discovered the blood-forming stem cell, the hematopoietic stem cell (HSC), through their pioneering work in mice. McCulloch and Till began a series of experiments in which bone marrow cells were injected into irradiated mice. They observed lumps in the spleens of the mice that were linearly proportional to the number of bone marrow cells injected. They hypothesized that each lump (colony) was a clone arising from a single marrow cell (stem cell). In subsequent work, McCulloch and Till, joined by graduate student Andrew John Becker and senior scientist Louis Siminovitch, confirmed that each lump did in fact arise from a single cell. Their results were published in Nature in 1963. In that same year, Siminovitch was a lead investigator for studies that found colony-forming cells were capable of self-renewal, which is a key defining property of stem cells that Till and McCulloch had theorized.[9]
The first therapy using stem cells was a bone marrow transplant performed by French oncologist Georges Mathé in 1956 on five workers at the Vinča Nuclear Institute in Yugoslavia who had been affected by a criticality accident. The workers all survived.[10]
In 1981, embryonic stem (ES) cells were first isolated and successfully cultured using mouse blastocysts by British biologists Martin Evans and Matthew Kaufman. This allowed the formation of murine genetic models, a system in which the genes of mice are deleted or altered in order to study their function in pathology. In 1991, a process that allowed the human stem cell to be isolated was patented by Ann Tsukamoto. By 1998, human embryonic stem cells were first isolated by American biologist James Thomson, which made it possible to have new transplantation methods or various cell types for testing new treatments. In 2006, Shinya Yamanaka's team in Kyoto, Japan converted fibroblasts into pluripotent stem cells by modifying the expression of only four genes. The feat represents the origin of induced pluripotent stem cells, known as iPS cells.[7]
In 2011, a female maned wolf, run over by a truck, underwent stem cell treatment at the Zoo Brasília [pt], this being the first recorded case of the use of stem cells to heal injuries in a wild animal.[11][12]
Properties
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산삼
이번에 대량 생산에 성공한 희귀 산삼은 2022년 11월 전남에서 발견한 세계적으로 유례없는 크기의 산삼이다. 수령만 150년으로 감정가는 약 6억 8000만 원에 달한다. 특히 다양한 생물학적 가치를 지닌 것으로 알려졌다.2일 전
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인간 배아줄기세포
https://ko.wikipedia.org/wiki/%EB%B0%B0%EC%95%84%EC%A4%84%EA%B8%B0%EC%84%B8%ED%8F%AC
배아줄기세포(Embryonic stem cell, ES cells)는 배반포의 내부세포괴에서 유래한 만능성 줄기세포로, 초기 착상 전 배아이다.[1][2] 수정 후 인간의 배아는 4-5달 후 배반포를 형성하며, 그 때 배아는 50-150개의 세포로 구성된다. 배반포의 안쪽에는 내세포괴라고 하는 세포들의 덩어리가 있는데, 이 세포들은 세포분열과 분화를 거쳐 배아를 형성하고, 배아는 임신기간을 거치면서 하나의 개체로 발생하게 된다. 이 과정에서 내세포괴의 세포들이 혈액, 뼈, 피부, 간 등 한 개체에 있는 모든 조직의 세포로 분화하게 된다. 때문에 배아 단계에서 추출한 줄기세포는 뼈, 간, 심장 등 장기로 발전할 수 있는 만능세포라고 불린다.
배아줄기세포로 각종 난치병 치료에 쓰이는 장기 세포를 시험관에서 무한정 만들어 이식할 수 있다면 인류의 꿈인 무병장수가 실현될 수 있다. 기증된 장기가 부족한 현실에서 꼭 필요한 기술이다. 현재 백혈병, 파킨슨병, 당뇨병 등에 걸린 환자에게 장애가 생긴 세포를 대신하는 정상 세포를 외부에서 배양, 주입하여 치료하려는 시도가 행해지고 있다.
쥐의 배아줄기세포는 8마이크로미터에 가깝고 사람의 배아줄기세포는 약 14마이크로미터이다
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줄기세포의 종류:
배아줄기세포 (Embryonic Stem Cells):
수정란에서 유래하며, 신체의 모든 종류의 세포로 분화할 수 있는 만능성을 가지고 있습니다.
성체줄기세포 (Adult Stem Cells):
이미 특정 조직에 존재하는 줄기세포로, 해당 조직이나 유사한 조직으로만 분화할 수 있습니다. 예를 들어, 조혈모세포는 혈액 세포로 분화하고, 지방줄기세포는 지방 세포 등으로 분화합니다.
유도만능줄기세포 (Induced Pluripotent Stem Cells, iPS Cells):
성체세포를 역분화시켜 배아줄기세포와 유사한 상태로 만든 줄기세포입니다. 역분화 과정에서 특정 유전자를 조작하여 분화된 세포를 줄기세포처럼 만들 수 있습니다.
줄기세포의 특징:
자기 복제 능력:
줄기세포는 분화하지 않은 상태로 자기 자신을 복제할 수 있습니다.
분화 능력:
줄기세포는 특정 환경에서 다양한 종류의 세포로 분화할 수 있습니다.
재생 의학의 핵심:
줄기세포는 손상된 조직이나 장기를 재생하는 데 사용될 수 있습니다.
줄기세포 연구 및 치료:
줄기세포 연구는 재생 의학 분야에서 활발히 진행되고 있으며, 난치병 치료에 대한 희망을 주고 있습니다. 특히, 유도만능줄기세포는 면역 거부 반응의 위험을 줄이면서 줄기세포를 확보할 수 있다는 점에서 큰 기대를 받고 있습니다.
더 자세한 정보는 다음을 참조하세요:
줄기세포 - 위키백과: Wikipedia
배아줄기세포 - 위키백과: Wikipedia
유도만능줄기세포(iPS)및 유전자 편집 - Cyagen Korea: Cyagen Korea
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줄기세포배양 기술로 심봤다 150년 수령 6억짜리
https://www.google.com/search?q=%EC%A4%84%EA%B8%B0%EC%84%B8%ED%8F%AC%EB%B0%B0%EC%96%91+%EA%B8%B0%EC%88%A0%EB%A1%9C+%EC%8B%AC%EB%B4%A4%EB%8B%A4+150%EB%85%84+%EC%88%98%EB%A0%B9+6%EC%96%B5%EC%A7%9C%EB%A6%AC&sca_esv=5da2b0c0536aa051&sxsrf=AE3TifNkvNN_f71HSr19ph5JUrtnSbPD4Q%3A1751577845767&ei=9fRmaNzGLqTJ0PEPutXu-Qc&ved=0ahUKEwiclaz6z6GOAxWkJDQIHbqqO38Q4dUDCBA&uact=5&oq=%EC%A4%84%EA%B8%B0%EC%84%B8%ED%8F%AC%EB%B0%B0%EC%96%91+%EA%B8%B0%EC%88%A0%EB%A1%9C+%EC%8B%AC%EB%B4%A4%EB%8B%A4+150%EB%85%84+%EC%88%98%EB%A0%B9+6%EC%96%B5%EC%A7%9C%EB%A6%AC&gs_lp=Egxnd3Mtd2l6LXNlcnAiP-ykhOq4sOyEuO2PrOuwsOyWkSDquLDsiKDroZwg7Ius67Sk64ukIDE1MOuFhCDsiJjroLkgNuyWteynnOumrDIFEAAY7wUyBRAAGO8FMgUQABjvBTIFEAAY7wUyBRAAGO8FSNySA1AAWLL8AnAIeACQAQCYAcQBoAHhJKoBBTQyLjEyuAEDyAEA-AEBmAI-oALXKsICChAjGIAEGCcYigXCAgQQIxgnwgIFEAAYgATCAgUQLhiABMICDhAuGIAEGMcBGI4FGK8BwgIKEAAYgAQYFBiHAsICChAAGIAEGEMYigXCAgoQLhiABBhDGIoFwgIEEAAYHsICCBAAGKIEGIkFwgIIEAAYgAQYogTCAgUQIRigAcICBxAAGIAEGA3CAgcQIRigARgKmAMAkgcHNDIuMTkuMaAH8J8CsgcHMzQuMTkuMbgH3CnCBwswLjEuMjcuMjcuN8gH7gQ&sclient=gws-wiz-serp
Plant Stem Cell
https://en.wikipedia.org/wiki/Plant_stem_cell
Plant stem cells are innately undifferentiated cells located in the meristems of plants.[1] Plant stem cells serve as the origin of plant vitality, as they maintain themselves while providing a steady supply of precursor cells to form differentiated tissues and organs in plants.[2][failed verification] Two distinct areas of stem cells are recognised: the apical meristem and the lateral meristem.
Plant stem cells are characterized by two distinctive properties, which are: the ability to create all differentiated cell types and the ability to self-renew such that the number of stem cells is maintained.[3] Plant stem cells never undergo aging process but immortally give rise to new specialized and unspecialized cells, and they have the potential to grow into any organ, tissue, or cell in the body.[2][failed verification] Thus they are totipotent cells equipped with regenerative powers that facilitate plant growth and production of new organs throughout lifetime.[1][failed verification]
Unlike animals, plants are immobile. As plants cannot escape from danger by taking motion, they need a special mechanism to withstand various and sometimes unforeseen environmental stress. Here, what empowers them to withstand harsh external influence and preserve life is stem cells. In fact, plants comprise the oldest and the largest living organisms on earth, including Bristlecone Pines in California, U.S. (4,842 years old), and the Giant Sequoia in mountainous regions of California, U.S. (87 meters in height and 2,000 tons in weight).[4] This is possible because they have a modular body plan that enables them to survive substantial damage by initiating continuous and repetitive formation of new structures and organs such as leaves and flowers.[1]
Plant stem cells are also characterized by their location in specialized structures called meristematic tissues, which are located in root apical meristem (RAM), shoot apical meristem (SAM), and vascular system ((pro)cambium or vascular meristem.)[5]
Research and development
Traditionally, plant stem cells were thought to only exist in SAM and RAM and studies were conducted based on this assumption. However, recent studies have indicated that (pro)cambium also serves as a niche for plant stem cells: "Procambium cells fulfill the criteria for being stem cells since they have the capacity for long-term self renewal and being able to differentiate into one or more specialized cell types."[6][failed verification]
Cambium is a type of meristem with thin walls which minutely exist in small populations within a plant. Due to this structural characteristic, once physical force is applied to it, it is easily damaged in the very process of isolation, losing its stem cell characteristics. Despite 160 years of biological effort to isolate and retrieve plant stem cells, none succeeded in the isolation due to the distinct structural characteristics of plant stem cell: "[t]he cambium consists of a few layers of narrow elongated, thin-walled cells, easily damaged during sampling." This highly vulnerable feature has made studies on cambial structure and ultrastructure difficult to achieve with conventional methods. Thus failure to isolate plant stem cells from meristematic tissues prompted scientists to administer plant cell culture by using callus (dedifferentiated cells) as an alternative to plant stem cells.
Callus, or dedifferentiated cells, are somatic cells that undergo dedifferentiation to give rise to totipotent embryogenic cells, which temporarily gains the ability to proliferate and/or regenerate an embryo. Since embryogenic cells were considered totipotent cells based on their ability to regenerate or develop into an embryo under given conditions, dedifferentiated cells were generally regarded as stem cells of plant: "…we propose to extend the concept of stem cells to include embryogenic stem cells that arise from plant somatic cells. We examine the cellular, physiological and molecular similarities and differences between plant meristematic stem cells and embryogenic stem cells originating directly from single somatic cells."
Plant stem cell vs. callus
Despite that callus exhibits a number of stem cell-like properties for a temporary period and that it has been cultured for useful plant compounds as an alternative source of plant stem cell, callus and plant stem cell are fundamentally different from each other. Callus is similar to plant stem cell in its ability to differentiate, but the two are different in their origin. While plant stem cell exists in the meristematic tissues of plant, callus is obtained as a temporary response to cure wounds in somatic cell.
Moreover, callus undergoes dedifferentiation as differentiated cells acquire ability to differentiate; but genetic variation is inevitable in the process because the cells consist of somatic undifferentiated cells from an adult subject plant. Unlike true stem cells, callus is heterogeneous. Due to this reason, continuous and stable cell division of callus is difficult. Hence a plant stem cell originated from cambium is an immortal cell while that from callus is a temporarily dediffertiated cell obtained from stimulating the somatic cell.
Furthermore, the ability to differentiate and proliferate is different that differences between plant stem cell and callus are prevalent in culture and research. Only plant stem cells embedded in meristems can divide and give rise to cells that differentiate while giving rise to new stem cells. These immortal cells divide infinitely.
Bioprocess innovation
Plant cells are cultured to acquire plant useful compounds. However cell cultures are often hindered by various factors especially if cell culture continues long-term. However, strong vitality and structural characteristics of plant stem cell overcome previous drawbacks to plant cell culture. Thus plant stem cell culture is the most ideal and productive method of cell culture and phytochemical production as cells are successfully mass cultured while maintaining quality.
Further applications
Numerous medicines, perfumes, pigments, antimicrobials, and insecticides are derived from plant natural products. Cultured Cambial Meristematic Cells (CMC) may provide a cost-effective, environmentally friendly, and sustainable source of important natural products, including paclitaxel. Unlike plant cultivation, this approach is not subject to the unpredictability caused by variation in climatic conditions or political instability in certain parts of the world. Also, CMCs from reference specifies may also provide an important biological tool to explore plant stem cell function.
In 2010, researchers from the Plant Stem Cell Institute [ko] (formerly Unhwa Institute of Science and Technology) presented their data to the world via Nature Biotechnology. Their research demonstrated the world's first cambial meristematic cell isolation. Due to the valuable and beneficial compounds for human health (i.e. paclitaxel) which are secreted by the CMC's, this technology is considered a serious breakthrough in plant biotechnology.[7][non-primary source needed]
See also
Callus (cell biology)
Stem cell
References
Weigel D, Jürgens G (February 2002). "Stem cells that make stems". Nature. 415 (6873): 751–4. Bibcode:2002Natur.415..751W. doi:10.1038/415751a. PMID 11845197. S2CID 9032410.
Sablowski R (November 2004). "Plant and animal stem cells: conceptually similar, molecularly distinct?". Trends in Cell Biology. 14 (11): 605–11. doi:10.1016/j.tcb.2004.09.011. PMID 15519849.
Scheres B (August 2005). "Stem cells: a plant biology perspective". Cell. 122 (4): 499–504. doi:10.1016/j.cell.2005.08.006. hdl:1874/21117. PMID 16145811. S2CID 1705295.
"Gymnosperm Database". Pinus longaeva. 15 March 2007. Retrieved 2006-07-25.
Hirakawa Y, Shinohara H, Kondo Y, Inoue A, Nakanomyo I, Ogawa M, Sawa S, Ohashi-Ito K, Matsubayashi Y, Fukuda H (September 2008). "Non-cell-autonomous control of vascular stem cell fate by a CLE peptide/receptor system". Proceedings of the National Academy of Sciences of the United States of America. 105 (39): 15208–13. Bibcode:2008PNAS..10515208H. doi:10.1073/pnas.0808444105. PMC 2567516. PMID 18812507.
Alison MR, Poulsom R, Forbes S, Wright NA (July 2002). "An introduction to stem cells". The Journal of Pathology. 197 (4): 419–23. doi:10.1002/path.1187. PMID 12115858.
Lee EK, Jin YW, Park JH, Yoo YM, Hong SM, Amir R, Yan Z, Kwon E, Elfick A, Tomlinson S, Halbritter F, Waibel T, Yun BW, Loake GJ (November 2010). "Cultured cambial meristematic cells as a source of plant natural products". Nature Biotechnology. 28 (11): 1213–7. doi:10.1038/nbt.1693. PMID 20972422. S2CID 205274906.
Further reading
Singh MB, Bhalla PL (May 2006). "Plant stem cells carve their own niche". Trends in Plant Science. 11 (5): 241–6. Bibcode:2006TPS....11..241S. doi:10.1016/j.tplants.2006.03.004. PMID 16616580.
Weigel D, Jürgens G (February 2002). "Stem cells that make stems". Nature. 415 (6873): 751–4. Bibcode:2002Natur.415..751W. doi:10.1038/415751a. PMID 11845197. S2CID 9032410.
Ivanov VB (October 2007). "Oxidative stress and formation and maintenance of root stem cells". Biochemistry. Biokhimiia. 72 (10): 1110–4. doi:10.1134/s0006297907100082. PMID 18021068. S2CID 14674628.
Müller B, Sheen J (June 2008). "Cytokinin and auxin interaction in root stem-cell specification during early embryogenesis". Nature. 453 (7198): 1094–7. Bibcode:2008Natur.453.1094M. doi:10.1038/nature06943. PMC 2601652. PMID 18463635.
Neumüller RA, Betschinger J, Fischer A, Bushati N, Poernbacher I, Mechtler K, Cohen SM, Knoblich JA (July 2008). "Mei-P26 regulates microRNAs and cell growth in the Drosophila ovarian stem cell lineage". Nature. 454 (7201): 241–5. Bibcode:2008Natur.454..241N. doi:10.1038/nature07014. PMC 2988194. PMID 18528333.
Scheres B (May 2007). "Stem-cell niches: nursery rhymes across kingdoms". Nature Reviews. Molecular Cell Biology. 8 (5): 345–54. doi:10.1038/nrm2164. PMID 17450175. S2CID 34588810.
Eric, Simon; Campbell, Neil; Reece, Jane (2007). Essential Biology with Physiology. San Francisco, CA: Pearson Benjamin Cummins. ISBN 9780805368413.
Staveley BE (10 December 2008). "Plant Development". Department of Biology. Memorial University of Newfoundland. Archived from the original on 30 November 2012. Retrieved 8 September 2017.
Categories: Plant physiologyStem cells
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STEM CELL https://en.wikipedia.org/wiki/Stem_cell
In multicellular organisms, stem cells are undifferentiated or partially differentiated cells that can change into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage.[1] They are found in both embryonic and adult organisms, but they have slightly different properties in each. They are usually distinguished from progenitor cells, which cannot divide indefinitely, and precursor or blast cells, which are usually committed to differentiating into one cell type.
In mammals, roughly 50 to 150 cells make up the inner cell mass during the blastocyst stage of embryonic development, around days 5–14. These have stem-cell capability. In vivo, they eventually differentiate into all of the body's cell types (making them pluripotent). This process starts with the differentiation into the three germ layers – the ectoderm, mesoderm and endoderm – at the gastrulation stage. However, when they are isolated and cultured in vitro, they can be kept in the stem-cell stage and are known as embryonic stem cells (ESCs).
Adult stem cells are found in a few select locations in the body, known as niches, such as those in the bone marrow or gonads. They exist to replenish rapidly lost cell types and are multipotent or unipotent, meaning they only differentiate into a few cell types or one type of cell. In mammals, they include, among others, hematopoietic stem cells, which replenish blood and immune cells, basal cells, which maintain the skin epithelium, and mesenchymal stem cells, which maintain bone, cartilage, muscle and fat cells. Adult stem cells are a small minority of cells; they are vastly outnumbered by the progenitor cells and terminally differentiated cells that they differentiate into.[1]
Research into stem cells grew out of findings by Canadian biologists Ernest McCulloch, James Till and Andrew J. Becker at the University of Toronto and the Ontario Cancer Institute in the 1960s.[2][3] As of 2016, the only established medical therapy using stem cells is hematopoietic stem cell transplantation,[4] first performed in 1958 by French oncologist Georges Mathé. Since 1998 however, it has been possible to culture and differentiate human embryonic stem cells (in stem-cell lines). The process of isolating these cells has been controversial, because it typically results in the destruction of the embryo. Sources for isolating ESCs have been restricted in some European countries and Canada, but others such as the UK and China have promoted the research.[5] Somatic cell nuclear transfer is a cloning method that can be used to create a cloned embryo for the use of its embryonic stem cells in stem cell therapy.[6] In 2006, a Japanese team led by Shinya Yamanaka discovered a method to convert mature body cells back into stem cells. These were termed induced pluripotent stem cells (iPSCs).[7]
History
The term stem cell was coined by Theodor Boveri and Valentin Haecker in late 19th century.[8] Pioneering works in theory of blood stem cell were conducted in the beginning of 20th century by Artur Pappenheim, Alexander A. Maximow, Franz Ernst Christian Neumann.[8]
The key properties of a stem cell were first defined by Ernest McCulloch and James Till at the University of Toronto and the Ontario Cancer Institute in the early 1960s. They discovered the blood-forming stem cell, the hematopoietic stem cell (HSC), through their pioneering work in mice. McCulloch and Till began a series of experiments in which bone marrow cells were injected into irradiated mice. They observed lumps in the spleens of the mice that were linearly proportional to the number of bone marrow cells injected. They hypothesized that each lump (colony) was a clone arising from a single marrow cell (stem cell). In subsequent work, McCulloch and Till, joined by graduate student Andrew John Becker and senior scientist Louis Siminovitch, confirmed that each lump did in fact arise from a single cell. Their results were published in Nature in 1963. In that same year, Siminovitch was a lead investigator for studies that found colony-forming cells were capable of self-renewal, which is a key defining property of stem cells that Till and McCulloch had theorized.[9]
The first therapy using stem cells was a bone marrow transplant performed by French oncologist Georges Mathé in 1956 on five workers at the Vinča Nuclear Institute in Yugoslavia who had been affected by a criticality accident. The workers all survived.[10]
In 1981, embryonic stem (ES) cells were first isolated and successfully cultured using mouse blastocysts by British biologists Martin Evans and Matthew Kaufman. This allowed the formation of murine genetic models, a system in which the genes of mice are deleted or altered in order to study their function in pathology. In 1991, a process that allowed the human stem cell to be isolated was patented by Ann Tsukamoto. By 1998, human embryonic stem cells were first isolated by American biologist James Thomson, which made it possible to have new transplantation methods or various cell types for testing new treatments. In 2006, Shinya Yamanaka's team in Kyoto, Japan converted fibroblasts into pluripotent stem cells by modifying the expression of only four genes. The feat represents the origin of induced pluripotent stem cells, known as iPS cells.[7]
In 2011, a female maned wolf, run over by a truck, underwent stem cell treatment at the Zoo Brasília [pt], this being the first recorded case of the use of stem cells to heal injuries in a wild animal.[11][12]
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