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泰国研究人员成功提取高纯度羊水干细胞 [复制链接]

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发表于 2012-10-20 21:15 |只看该作者 |倒序浏览 |打印
新华网曼谷10月19日电(记者黎藜)泰国研究人员19日宣布,他们首次从人类羊水中成功提取出高纯度干细胞,有望为多种顽固疾病的治疗带来福音。
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    泰国诗里叻医院妇产科干细胞研究与发展小组负责人塔讪尼说,过去5年时间里,该小组一直致力于以一种新的方式提取羊水干细胞。研究人员提取一些怀孕16周至20周的孕妇羊水样本并进行培养,成功提取出高纯度的干细胞。
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# s# p8 n& b- u' |- B: t/ q' g' ~    塔讪尼说,他们已经将所提取的高纯度干细胞注射入实验鼠体内,以研究其治疗风湿病的效果。如果动物实验获得成功,将申请进行临床研究。
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    干细胞是人体内未充分分化、具有自我更新和分化潜能的细胞,在医学上有广泛应用前景。胚胎干细胞则具有“全能”的发展潜力,用胚胎干细胞来培养人体组织和器官以治疗疾病是最理想的。但胚胎干细胞要从胚胎中提取,涉及伦理和道德问题,因此科学界一直在试图通过其他途径获取干细胞。" G$ C  w; ^! L8 B# \# F2 ]; m
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发表于 2012-10-22 09:10 |只看该作者
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Show scientists the road
  X+ `/ z" V3 Y3 f9 PChularat Saengpassa ,Pongphon Sarnsamak : N; e+ ^) R' W# c
The Nation October 22, 2012 1:00 am. J7 f: y5 V2 ~5 {8 _: a. L; P( @

* \, d8 |+ e6 L) ], d$ F) P+ v. lThai successes in stem-cell research have come despite a lack of funding or a national plan
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8 s6 c% ]. Y) v  [Thailand is fascinated with "roadmaps", but when it comes to life-or-death matters like regenerative science, the country has none.
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Shinya Yamanaka and John Gurdon cheered regenerative scientists around the world, including those working on stem-cell body rebuilding in private and public hospitals here, when they were awarded the Nobel Prize for Physiology or Medicine on October 8.; y' ^* T# B" P0 |/ P0 j
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But looking back at the environment at home, Thai scientists sighed. Local development of the technique has been direction-less and under-funded.) J  |! b; _8 c! b* e3 f6 j
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Stem-cell research has drawn attention from scientists around the world, including Thai scientists, ever since South Korea's Dr Hwang Woo-suk and his team reported that they had successfully created human embryonic stem cells by cloning in 2005.3 O/ h/ w' y8 x( N1 K7 Z; N

8 A3 b( e$ }8 JEven though much of this "breakthrough" research was later found to have been faked, many researchers and scientists in Thailand continued to follow their curiosity to discover how to effectively use stem cells for treatment.* y  b' [8 Q3 |! }
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Over the past decade, stem cell-related research centres have mushroomed at public and private educational institutions and hospitals across the country, such as centres for heart disease, diabetes, Alzheimer's disease, Parkinson's disease, thalassemia and leukaemia.* H- ]! `+ D. z; a

6 z( |+ B( ^  k$ ~Already this year, at least three universities have reported success in stem-cell research.6 j4 ~: R6 e3 S+ z/ D7 f8 O: K- b

& U  N& t3 Q3 x" w! CChulalongkorn University early this year proclaimed that it was the first in Thailand to produce human embryonic stem cells and established the country's first embryonic stem-cell bank./ e4 ^% Z9 B# }6 r. W
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Police General Hospital has developed adult stem cells to treat arthritis sufferers. The hospital is now conducting a clinical trial on 60 arthritis patients aged 45-60. The human trial is expected to be completed next year.
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Last week, a team of researchers at Mahidol University's Siriraj Hospital said they had discovered a method to extract pure stem cells from human amniotic fluid, which they say could be potentially used to treat several severe conditions such as arthritis.$ U7 d9 L0 @, r$ Y: c

8 m$ j0 i& [- Y) q7 A, |& q# n7 LBut looking behind their success stories, we can see that most of them had to rely on their own funds to establish their laboratories and conduct studies. Only a portion of the money came from the government.: r0 `0 [7 x% s5 {: j  q7 g
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"The government has never paid attention to supporting scientific research. We had to use our own funds collected from donations to do stem-cell research and conduct studies," Lt-General Jongjet Aojanepong, director of Police General Hospital, said recently.
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. v5 O5 U+ k% R$ u6 w' D( O$ }The hospital has spent about Bt3 million-Bt4 million to conduct stem-cell research on arthritis patients. The hospital also wants to conduct another study on how stem cells can restore severely damaged neurons next year, but still lacks a budget to carry on.9 _5 I) W2 ]0 Y4 I! a2 t

* x2 M  Y" l3 g& p- `* @Researchers need not only funding but also a national roadmap to steer stem-cell research and development.1 e$ @) p: s6 w: @
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Stem-cell therapy will be a key treatment in the near future. We need a formal forum to see the future together," he said.
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  h# h6 y' Z: l( ~3 K; z% f; b7 PStem-cell research is booming in Thailand, but there is no central organisation to systematically manage the research budget and chart the direction of stem cell research.% l0 m5 z( v: `$ `6 {5 l
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Even though the government has set up the National Research Council of Thailand (NRCT) to oversee all research in the country, most of the budget was allocated to support research on agriculture, which is a priority need for the country.* `1 c1 O, W6 ^: Q" E1 d( c# y8 [/ Y
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The council gets about Bt10 billion from the government to support all research in the country, but only Bt60 million-Bt100 million per year goes to stem-cell research, said Dr Soottiporn Chittrmittrapap, secretary-general of the NRCT.% l* e2 v1 B/ h5 {

% r; s0 a8 s) V! s"I think the number of people who might benefit from stem cell research is only in the hundreds - [less than] in other fields," he said.# F, F9 n  a" F* @0 l0 u# C; u4 {2 O& t
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However, he agreed with Jongjet's idea of drafting a national roadmap so that Thailand can have a clear direction for researchers and scientists to conduct research.8 t7 U% t" H% C4 h  s

: x" j) D6 `  i; TThe roadmap should focus on diseases that remain difficult to treat such as macular degeneration, which is the leading cause of blindness.& N0 M- d5 r4 n

3 W7 Q7 \3 z8 N"We will come up with the stem-cell research roadmap by the end of this year, as we plan to organise a conference and invite all stem-cell experts to give their opinion on this roadmap," he said.
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! Q) X/ _% u. E& _, r! C' c6 ]: _In Thailand, there are at least four main agencies supporting stem-cell research - the NRCT; the Thailand Research Fund; the National Science and Technology Development Agency; and the Public Health Ministry. But these agencies work separately on stem-cell research.
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To draw up the national stem-cell research roadmap, Dr Chatree Duangnet, vice president of Bangkok Dusit Medical Services (BGH), said educational institutions should be a key player in brainstorming ideas with stakeholders to designate the country's goals, strategy, direction and financial support for stem-cell research.
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4 f2 m9 _3 C1 ?6 R, [4 o"The government should speed up its work to come up with a national roadmap and policy for stem-cell research to support Thai scientists and researchers, as this kind of therapy will be the next generation of medical treatment," he said.# k2 z8 b+ M+ E6 V9 ?* |$ v8 J3 {
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Bangkok Hospital, run by BGH, has conducted stem-cell research in the treatment of heart disease, but had to stop after the Medical Council issued a regulation forbidding private hospitals from conducting such research.
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The hospital has been limited to joining with foreign medical institutions, such as the University of Texas MD Anderson Centre, by supporting financial sources in the study of bone-marrow transplants.
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"Stem cells will play an important role in treatment and estimate the risk of medicinefor patients in 10 years. So the stem-cell research roadmap would help us to see which way we should go," Soottiporn added.
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发表于 2013-1-16 22:26 |只看该作者
求原文,谢谢!
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