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Last Updated: Thursday, 19 May 2005, 21:11 GMT 22:11 UK  




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Q&A: Cloned human embryos

 

People with heart conditions, Parkinson's, or spinal cord injuries could benefit

UK researchers have successfully made cloned human embryos, following in the steps of South Korean scientists who created 30 human embryo clones last year.


 

¿µ±¹ÀÇ ¿¬±¸ÀÚµéÀº, À۳⿡ 30¿©°³ÀÇ Àΰ£ ¹è¾Æ º¹Á¦¸¦ âÁ¶Çس½ Çѱ¹ °úÇÐÀÚµéÀÇ ÀýÂ÷¸¦ µû¶ó¼­, ¼º°øÀûÀ¸·Î Àΰ£ ¹è¾ÆµéÀ» º¹Á¦Çس´Ù.


 

BBC News looks at the significance of the announcement.

What have the UK researchers done?

Professor Alison Murdoch and colleagues at Newcastle University took donor eggs and switched the genetic material of these cells with DNA from embryonic stem cells.


 

´ºÄɽ½ ´ëÇÐÀÇ ¿¤¸®½¼ ¹«¸£µµÅ© ±³¼ö¿Í ±×ÀÇ µ¿·áµéÀº ±âÁõ ³­ÀÚµéÀ» ÃëÇؼ­, ¹è¾ÆÁٱ⠼¼Æ÷µé·ÎºÎÅÍ ±×°ÍµéÀÇ À¯Àü ¹°Áúµé°ú DNA¸¦ ¼­·Î À§Ä¡º¯°æÀ» ½ÃÄ×´Ù.


 

Three of the resultant clones grew for three days and one survived another two days.

Embryos at the five day stage are composed of a ball of cells and called a blastocyst.

 

ÀÌ·¸°Ô º¹Á¦µÈ °Íµé Áß 3°³´Â 3ÀÏ µ¿¾È ¼ºÀåÇßÀ¸¸ç, Çϳª´Â ±× ÀÌÈÄ ÀÌƲ »ýÁ¸Çß´Ù.

5ÀÏ° ´Ü°è¿¡ µé¾î°£ ¹è¾ÆµéÀº ¼¼Æ÷µéÀÇ ¾Ë·Î ÀÌ·ç¾îÁ® Àִµ¥, À̸¦ Æ÷À¯·ùÀÇ Æ÷¹è(øàÛÏ)¶ó°í ºÒ¸°´Ù.


 

How does this differ from the Seoul researchers' work?

Professor Hwang Woo-suk and colleagues created embryos that were the exact genetic copies of the women who donated the eggs and cells to make them.

They produced 30 embryo clones that divided over several days to a stage where special cells known as embryonic stem cells could be extracted.


 

Ȳ¿ì¼® ±³¼ö¿Í ±×ÀÇ µ¿·áµéÀº ¹è¾ÆµéÀ» ¸¸µé¾î ³Â¾ú´Âµ¥, ±×°ÍµéÀº ³­ÀÚ¿Í ¼¼Æ÷µéÀ» ±âÁõÇß´ø ¿©¼ºµéÀÇ À¯ÀüÀÚ¿Í Á¤È®È÷ ÀÏÄ¡ÇÏ´Â º¹Á¦¹°µéÀ̾ú´Ù.

±×µéÀº 30°³ÀÇ ¹è¾Æ º¹Á¦¹°µéÀ» »ý»êÇس´µ¥, À̰͵éÀÌ 5~7ÀÏ  °Ô ºÐ¿­µÇ´Ù ¾î¶² ´Ü°è¿¡ µµ´ÞÇߴµ¥, °Å±â¼­ ¹è¾ÆÁٱ⠼¼Æ÷µéÀ̶ó ¾Ë·ÁÁø Ưº°ÇÑ ¼¼Æ÷µéÀÌ ÃßÃâµÉ ¼ö ÀÖ¾ú´Ù.


 

How credible is the research?

Several groups have made claims in the past for similar work.

In some cases, no evidence was presented to back up the assertions. In others, where supporting data was published, the embryos stopped dividing at a very early stage.

The Koreans, on the other hand, have shown their embryos to be long lasting. What is more, they have subjected their work to independent scrutiny and a paper detailing their experiments has been published by the international journal Science.

Dr Murdoch's team's work is also published at Reproductive BioMedicine online


 

°ú°Å¿¡µµ ¸î¸îÀÇ ±×·ìµéÀÌ À¯»çÇÑ ÀÛ¾÷µéÀ» ÁÖÀåÇØ¿Ô´Ù. ¾î¶² °æ¿ì¿¡´Â, ±× ÁÖÀåµéÀ» µÞ¹ÞħÇÏ´Â ¾î¶² Áõ°Åµéµµ Á¦½ÃµÇÁö ¾Ê¾Ò¾ú´Ù. ±×¸®°í ´Ù¸¥ °æ¿ìµé¿¡´Â, Áõ°ÅÀÚ·á°¡ ÃâÆǵǰí, ¹Ù·Î ±× Ãʱ⠴ܰ迡¼­ ¹è¾ÆµéÀ» ºÐ¸®ÇÏ´Â °ÍÀ» Áß´ÜÇß´Ù.

¹Ý¸é¿¡. Çѱ¹ÀÇ ¿¬±¸ÀÚµéÀº ¿À·¡ Áö¼ÓµÉ ¼ö ÀÖ´Â ¹è¾ÆµéÀ» º¸¿©Áà ¿Ô¾ú´Ù. ´õ±º´Ù³ª, ±×µéÀº ±×µéÀÇ ¿¬±¸¸¦ µ¶¸³ Á¶»ç±â±¸¿¡ Á¦½ÃÇß¾ú°í, ¡®±¹¸³Àú³Î°úÇС¯¿¡ ÃâÆǵǾú¾ú´ø, ±×µéÀÇ ½ÇÇè³»¿ëÀÌ ¼¼¼¼ÇÏ°Ô ±â·ÏµÇ¾î ÀÖ´Â ³í¹®À» Á¦½ÃÇß¾ú´Ù.

¹«¸£µµÅ© ¹Ú»ç ÆÀÀÇ ÀÛ¾÷ ¿ª½Ã ¡®»ý½Ä»ýÀÇÇÐ(Reproductive BioMedicine online)¡¯¿¡ ÃâÆǵȴÙ.  


 

What makes these techniques successful?

Both the South Korean team and the UK researchers credit their successes to the use of extremely fresh donor eggs.


 

Çѱ¹ ÆÀ°ú ¿µ±¹ÀÇ ¿¬±¸ÀÚµéÀº ¸Å¿ì ½Å¼±ÇÑ ±âÁõ³­ÀÚµéÀ» »ç¿ëÇÒ ¼ö ÀÖ¾ú±â¿¡ ±×µéÀÌ ¼º°øÇÒ ¼ö ÀÖ¾ú´Ù°í Çß´Ù.  


 

What is the point of the research?


SOUTH KOREAN CLONING

 



30 human embryos cloned

Cloning viewpoints



The ultimate aim would be to harvest stem cells - "master" cells that can divide into virtually any of the body's tissues - from the cloned embryos to treat diseases. This is known as therapeutic cloning.

The Koreans successfully extracted embryonic stem cells from their embryos.

They demonstrated the beginnings of this differentiation and saw it progress still further when the cells were transplanted into mice.

The Korean researchers view therapeutic cloning as very different from reproductive cloning - attempting to bring about the birth of a cloned baby.


 

±Ã±ØÀûÀÎ ¸ñÀûÀº Áٱ⼼Æ÷µéÀ» ¼öÈ®ÇØ ³»´Â °ÍÀÏ Áøµ¥, ÀÌ´Â º¹Á¦µÈ ¹è¾Æµé¿¡¼­ º´µéÀ» Ä¡·áÇÒ ¼ö ÀÖ´Â, Áï ÀÎüÁ¶Á÷ÀÇ ¾î´À °ÍÀ¸·Îµµ ½ÇÁ¦ÀûÀ¸·Î ºÐ¸®ÇÒ ¼ö ÀÖ´Â ±×·± ¡®ÁÖÀÎ(¸¸´É)¼¼Æ÷µéÀ» ¼öÈ®Çس»´Â °ÍÀ̸®¶ó.

Çѱ¹ÀεéÀº ¼º°øÀûÀ¸·Î ¹è¾Æµé·ÎºÎÅÍ Áٱ⠼¼Æ÷µéÀ» ÃßÃâÇß´Ù.

±×µéÀº ÀÌ·± ºÐÈ­ÀÇ Ãʱâ»óŵéÀ» °ø°³Çß¾ú°í, ±× ¼¼Æ÷µéÀ» Áã¿¡ À̽ÄÇÏ´Â °úÁ¤¿¡¼­, ³Ê Çâ»óµÈ Áøº¸¸¦ ºÃ´Ù.

 

How far away is therapeutic cloning?

Experts believe it will be many years before stem cell treatments d on cloning technology are available.

If the cells come from a cloned embryo they should not be rejected by the patient because they match exactly that individual's genetic make-up.

At the moment, patients have to take powerful drugs to prevent their body's immune system from attacking tissues transplanted from another person.


 

Àü¹®°¡µé¿¡ ÀÇÇϸé, º¹Á¦±â¼ú¿¡ ±âÃÊÇÑ Áٱ⠼¼Æ÷ ¹æ¹ýµéÀÌ ½Ç¿ëÈ­  µÇ±â±îÁö ¸¹Àº ½ÃÀÏÀÌ °É¸± °ÍÀ̶ó ÇÑ´Ù.

¸¸ÀÏ ±× ¼¼Æ÷µéÀÌ ÇϳªÀÇ º¹Á¦µÈ ¹è¾Æ¿¡¼­ ³ª¿Â °ÍÀ̶ó¸é, ±×°ÍµéÀº ȯÀڵ鿡°Ô ȯ¿µ¹ÞÀ» °ÍÀÌ´Ù, ¿Ö³ÄÇϸé, ±× ¼¼Æ÷µéÀÌ °¢ °³ÀεéÀÇ À¯Àü ±¸Á¶¿Í Á¤È®È÷ ÀÏÄ¡µÉ °ÍÀ̱⠶§¹®ÀÌ´Ù.

ÇöÀç ȯÀÚµéÀº ±×µéÀÇ ¸é¿ªÃ¼°è°¡ ´Ù¸¥ »ç¶÷µé·ÎºÎÅÍ ÀÌ½ÄµÈ Á¶Á÷¼¼Æ÷µéÀ» °ø°ÝÇÏ´Â °ÍÀ» ¸·±â À§ÇØ µ¶ÇÑ ¾à¹°µéÀ» º¹¿ëÇؾ߸¸ ÇÑ´Ù.


 

Are there not ethical concerns here?

All embryo research draws the criticism that it is tampering with cells which have the potential to be human beings.

The Korean and UK experiments were given approval by an ethical review board and all the women who donated cells and eggs gave informed consent - but this will mean nothing to those who are uncomfortable with this kind of science.


 

¸ðµç ¹è¾Æ ¿¬±¸´Â, ±×°ÍÀÌ Àΰ£ÀÌ µÉ °¡´É¼ºÀ» °¡Áö´Â ¼¼Æ÷µéÀ» Á¶ÀÛ(À§Á¶)ÇÏ°í ÀÖ´Ù´Â ºñÆÇÀ» ¹Þ°í ÀÖ´Ù.

Çѱ¹°ú ¿µ±¹ÀÇ Àü¹®°¡µéÀº À±¸®Á¶»çȸÀÇ ½ÂÀÎÀ» ¹Þ¾ÒÀ¸¸ç, ¼¼Æ÷µé°ú ³­ÀÚµéÀ» ±âÁõÇß´ø ¸ðµç ¿©¼ºµéµµ ÁöÁö¸¦ Çß´Ù. ±×·¯³ª ÀÌ´Â ÀÌ·± Á¾·ùÀÇ °úÇÐÀ» ¹Ý±âÁö ¾Ê´Â »ç¶÷µé¿¡°Ô´Â Àǹ̰¡ ¾øÀ» °ÍÀÌ´Ù.  


 

Could this latest work bring a cloned baby closer?

Potentially, yes.

Scientists have been struggling to clone monkeys. It is clear there are particular difficulties involved in making genetic copies of primates.

The Korean and UK research shows some of these technical hurdles can be overcome and those minded to produce cloned babies will attempt to use the new information to make children.


 

°úÇÐÀÚµéÀº ¿ø¼þÀ̸¦ º¹Á¦ÇÏ´Â °Í¿¡ ¾¾¸§ÇØ¿À°í ÀÖ´Â ÁßÀÌ´Ù. ºÐ¸íÇÑ °ÍÀº, ¿µÀå·ù¸¦ À¯Àüº¹Àç ÇÏ´Â µ¥´Â Ưº°ÇÑ ¾î·Á¿òµéÀÌ ÀÖ´Ù´Â Á¡ÀÌ´Ù.  

Çѱ¹°ú ¿µ±¹ÀÇ ¿¬±¸´Â ÀÌ·± ±â¼úÀû ³­Á¡µé Áß¿¡ ¾î¶² °ÍÀº ±Øº¹µÉ ¼ö ÀÖ´Ù´Â °ÍÀ» º¸¿©ÁÖ°í ÀÖÀ¸¸ç, º¹Á¦ ¾Æ±âµéÀ» »ý»êÇØ´Â °ÍÀ» ÀǵµÇÏ´Â ÀÚµéÀº ¾ÆÀ̵éÀ» ¸¸µé¾î³»±â À§ÇØ »õ·Î¿î Á¤º¸¸¦ »ç¿ëÇÏ·Á ½ÃµµÇÒ °ÍÀÌ´Ù.




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