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LONDON Nike Vapormax Bleu Pas Cher , Sept. 20 (Xinhua) -- For the first time researchers have used genome editing techniques to study gene function in human embryos, revealing the role of a key gene in the embryos' first few days of development, according to a study released on Wednesday by the Francis Crick Institute.


The results could help scientists better understand the biology of human early development.


The team led by researchers from the institute used genome editing techniques to stop a key gene from producing a protein called OCT4, which normally becomes active in the first few days of human embryo development.


After the egg is fertilized, it divides until at about seven days it forms a ball of around 200 cells called the "blastocyst." The study found that human embryos need OCT4 to correctly form a blastocyst.


"If we knew the key genes that embryos need to develop successfully, we could improve IVF treatments and understand some causes of pregnancy failure Nike Vapormax Noir Pas Cher ," said Dr Kathy Niakan from the Francis Crick Institute, who led the research, "It may take many years to achieve such an understanding; our study is just the first step."


As well as human embryo development, OCT4 is also thought to be important in stem cell biology. Pluripotent stem cells can become any other type of cell, and they can be derived from embryos or created from adult cells such as skin cells. Human embryonic stem cells are taken from a part of the developing embryo that has high levels of OCT4.


"We have the technology to create and use pluripotent stem cells, which is undoubtedly a fantastic achievement Nike Vapormax Pas Cher , but we still don't understand exactly how these cells work," said Dr James Turner, co-author of the study from the Francis Crick Institute.


The study has been published in the journal Nature.


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DEIR AL-ZOUR, Syria, Sept. 22 (Xinhua) -- After a six-hour drive from the capital Damascus to the northeast Nike Presto Ultra Flyknit Pas Cher , through the desert, the only sign of reaching Deir al-Zour city was a checkpoint and a long line of concrete barriers leading to another checkpoint with soldiers manning the entrance with a stone arch sign, featuring the Syrian flag.


After crossing the checkpoint, military outposts were seen surrounding the Panorama roundabout, with no sign of people or cars in the city, which has recently seen an end of a three-year siege imposed by Islamic State (IS) militants.


Driving through the city streets was easy as no cars or people were seen Nike Presto SE Woven Pas Cher , only some cars, covered with dust, with flat tiers were seen deserted here and there.


The only cars working were military vehicles.


No electricity, or fuel in the city, which later explained the empty streets. The city looked like a ghost town, with dust filling the roads Nike Presto Safari Pas Cher , and air, as it's surrounded by desert.


Xinhua reporters were escorted, along with other Syria-based reporters for foreign agencies, to the city for the first time with the Syrian army since the military forces broke the siege a couple of weeks ago.


After gathering at the Governorate building for a cup of tea and a quick snack, reporters were taken to the al-Wadi street, one of the main roads in the city.


At that popular marketplace Nike Presto QS Pas Cher , bone-weary people were seen for the first time by reporters. Their faces were haggard, reflecting the suffering during the siege.


Little children and young men started gathering around reporters, particularly when the governor of Deir al-Zour, Mohammed Ibrahim Samra, came to deliver a briefing.


Children were pushing their way through to reach him, and one was so determined.


""I have a fever. I need to speak to him Nike Presto Noir Pas Cher ,"" one child told a Xinhua reporter.


Just a few meters behind the governor, a convoy of aid trucks donated by Iran was on standby as the distribution was about to begin.


As reporters were preparing to start reporting, a sudden sound of explosions started being clearly heard in the area, and that's when people started running for a hiding place.


A man standing on the sidewalk invited Xinhua reporters to take shelter in his little shop.


""It's explosive bullets,"" people shouted while running for shelter.


Then, the soldiers asked the reporters to leave the area and get on the bus to leave.


One soldier told Xinhua that IS militants flew drones Nike Presto Mid Utility Pas Cher , some of which were outfitted with guns firing explosive bullets.


""They apparently exposed our location or had someone to tip them off about our presence in the area and they started firing,"" he said.


Later on, it turned out that around seven people were wounded on the same street by the firing.


With the government forces in control of 75 percent of the capital city of Deir al-Zour, the terror-designated group is still holding areas close to the government-controlled ones.


But their positions have been largely exposed now that the airbase of Deir al-Zour returned operational after the siege is lifted.


At the airbase, a military commander told Xinhua and other reporters that the Syrian army secured the vicinity of the facility completely.


""The airport has become ready for the landing of warplanes and helicopters as well as civilian planes. The vicinity of the airport is completely safe as the army secured 22 km around the facility in all directions and the military part of the airport is fully functional,"" he said.


On Sept. 9 Nike Presto Homme Pas Cher , the Syrian army broke the IS siege imposed on the mili. Cristiano Ronaldo Portugal Jersey Jeremy Mathieu France Jersey Jack Butland England Jersey Darijo Srna Croatia Jersey Felipe Aguilar Colombia Jersey Oscar Brazil Jersey Michy Batshuayi Belgium Jersey Guido Pizarro Argentina Jersey Diego Rolan Uruguay Jersey Xherdan Shaqiri Switzerland Jersey
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