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WASHINGTON, May 11 (Xinhua) -- Researchers at Brigham and Women 's Hospital (BWH), a teaching affiliate of Harvard Medical School, have identified a human lung stem cell that is self-renewing and capable of forming and integrating multiple biological structures of the lung. This research will be published Thursday in the New England Journal of Medicine."This research describes, for the first time, a true human lung stem cell. The discovery of this stem cell has the potential to offer those who suffer from chronic lung diseases a totally novel treatment option by regenerating or repairing damaged areas of the lung," said the study's corresponding author Piero Anversa, who is also director of the Center for Regenerative Medicine at the hospital.Using lung tissue from surgical samples, researchers identified and isolated the human lung stem cell and tested the functionality of the stem cell both in vitro and in vivo. Once the stem cell was isolated, researchers demonstrated in vitro that the cell was capable of dividing both into new stem cells and also into cells that would grow into various types of lung tissue. Next, researchers injected the stem cell into mice with damaged lungs. The injected stem cells differentiated into new bronchioles, alveoli and pulmonary vessel cells which not only formed new lung tissue, but also integrated structurally to the existing lung tissue in the mice.The researchers define this cell as truly "stem" because it fulfills the three categories necessary to fall under stem cell categorization: first, the cell renews itself; second, it forms into many different types of lung cells; and third, it is transmissible, meaning that after a mouse was injected with the stem cells and responded by generating new tissue, researchers were then able to isolate the stem cell in the treated mouse, and use that cell in a new mouse with the same results."These are the critical first steps in developing clinical treatments for those with lung disease for which no therapies exist. Further research is needed, but we are excited about the impact this discovery could have on our ability to regenerate or recreate new lung tissues to replace damaged areas of the lungs," said Joseph Loscalzo, chair of the Department of Medicine at BWH and co-author.

ADDIS ABABA, Jan. 28 (Xinhua) -- Fruitful results have been achieved some one year after the fourth ministerial meeting of the Forum on China-Africa Cooperation (FOCAC), Chinese envoy and Assistant Foreign Minister Liu Zhenmin told Xinhua here on Friday.Liu was in the Ethiopian capital Addis Ababa to attend the 16th African Union (AU) summit as special envoy of the Chinese government.During the FOCAC ministerial meeting held in November 2009 in Sharm el-Sheikh, Egypt, the Chinese government announced eight new measures of promoting Sino-African cooperation.Since then, China has been actively implementing various programs and projects according to the eight new measures, Liu said.The “China-Africa Science and Technology Partnership Program” and the “China-Africa Joint Research and Exchange Program” have been launched, Liu said, adding that the aid program of agricultural demonstration center is in smooth implementation process.Meanwhile, China is actively working on establishing the China-Africa partnership in addressing climate change, and is strengthening communication and coordination with Africa on the issue of climate change, Liu said.The Chinese envoy added that various programs and events such as the China-Africa Agricultural Cooperation Forum, the “African Culture in Focus 2010” activities, and the “20+20 Cooperation Plan of Chinese and African Institutions of Higher Learning” have been launched or successfully held. He said these events have promoted the comprehensive development of China-Africa relations.A wide range of other measures are also being carried out in an active manner, according to Liu.The year 2011 is key to the implementation of the measures announced on the fourth ministerial meeting of FOCAC, Liu stressed.To this end, China will continue strengthening communication and coordination with African countries, carrying out close cooperation and pushing forward the development of the China-Africa new strategic partnership, he pledged.

HARARE, Feb. 9 (Xinhua) -- The two-day visit to Zimbabwe by Chinese Foreign Minister Yang Jiechi starting Thursday is an endorsement of relations between the Southern African country and China, local figures told Xinhua.Former Zimbabwean ambassador to China Chris Mutsvangwa said in an interview on Tuesday that Yang's visit will also boost economic relations between the two countries."The visit of a foreign minister is a big banner announcement to say that relations between Zimbabwe and China are reaching for a new level," he said."This is a visit which will mark a new diplomatic high watermark in Zimbabwe's international relations because to get the visit of an important and emerging super-power like China with such economic clout is a big vote of confidence on the part of Zimbabweans who have been pummeled by sanctions" imposed by the West.Yang, who will make the visit at the invitation of Zimbabwean Foreign Minister Simbarashe Mumbengegwi, is scheduled to meet President Robert Mugabe and other senior government officials.Mutsvangwa said the Chinese veto at the United Nations in 2008 was "a landmark diplomatic decision where it basically saved Zimbabwe from punitive sanctions instigated by an irate and sulky former colonial power.""So, now this visit will give an opportunity for Zimbabweans tofinally thank China for this act. But more important, cooperation in the economic field is beginning to gather pace because we have crossed the diplomatic and political travails which have been going on in the last 10 years and come out more united because the Chinese veto also enabled Zimbabweans to find accommodation among themselves and led to the GNU and GPA," Mutsvangwa said.China, together with Russia, vetoed the British initiative for full-scale UN sanctions against Zimbabwe, saying the Southern African Development Community (SADC) and the African Union (AU) should be given a chance to resolve the country's political problems.A SADC-driven initiative led to a Government of National Unity (GNU) following the signing of the Global Political Agreement (GPA) between Mugabe and then rivals Prime Minister Morgan Tsvangirai and Deputy Prime Minister Arthur Mutambara."So there is more national unity now among Zimbabweans. It is an opportune moment for us to tighten our relations with China so that we can explore cooperation in the more rewarding material areas of agriculture, mining, tourism and industrialization."There is clearly a lot of scope for cooperation between Zimbabwe and China so that Zimbabwe can quicken its modernization pace taking advantage of the stellar achievements of the Chinese in the above areas," Mutsvangwa said.He cited areas such as telecommunications, international logistics and the internet as being led by the Chinese.China Tobacco has also been on the fore-front reviving tobacco farming in Zimbabwe for the past five years.Mutsvangwa said shortages in the global cotton sector could spur better trade relations between the two countries and lead to more opportunities for Zimbabwean farmers.

BEIJING, Jan. 21 (Xinhua) -- Chinese Vice Premier Hui Liangyu on Friday urged local governments to step up efforts in protecting agricultural production as winter wheat growing regions in the north of the country have been suffering due to the prolonged drought.Hui warned that the drought could cause great harm to agricultural production.Rainfall in north China, including provinces of Shanxi, Hebei and Shandong, has decreased 20 to 90 percent from the average rain in the same period since October last year.Chinese Vice Premier Hui Liangyu (C) speaks at a meeting on anti-drought and disaster reduction, in Beijing, capital of China, Jan. 21, 2011. Hui Liangyu on Friday urged local governments to step up efforts in protecting agricultural production as winter wheat growing regions in the north of the country have been suffering due to the prolonged drought.Hui urged local departments to improve meteorological monitoring and analysis of the drought, and provide training and services to farmers in order to reduce losses brought about by scarce rain.He also called on local governments to step up construction of more water conservancy projects to better cope with dry weather.Meanwhile, the drought in the north is compared with the intensive icy rain and snow in south and southwest China. A lingering cold spell has been wrecking havoc in these regions, disrupting vegetable production, transportation, and supplies of daily necessities.Hui said the central government would also beef up support in helping these affected regions resume agricultural production as soon as possible.

BEIJING, Feb. 12 (Xinhua) -- The Chinese government has reiterated a strict ban on hepatitis B tests during pre-employment physical examinations as many companies reportedly violated rules to require hepatitis B tests for job applicants.In a statement released Saturday, the Ministry of Health said that no health institutions are allowed to provide hepatitis B checks as part of pre-employment physical tests regardless of whether the examinees provide consent or not.On Feb. 10, 2010, the Ministry of Health, the Ministry of Education and the Ministry of Human Resources and Social Security jointly issued a circular demanding the cancellation of the hepatitis B tests during the health checks for school enrollment and employment nationwide.However, according to a survey released this week, which was conducted by the non-profit Beijing Yirenping Center, some 61.1 percent of the 180 state-run companies surveyed included hepatitis B checks in their pre-employment physical examinations.More surprisingly, 63 companies said that they would never consider hepatitis B carriers for a job or were reluctant to hire such people.Yu Fangqiang, the principal of the Yirenping Center, said that such violations mainly resulted from light punishment for violations and some health institutions' desire for profits.According to the survey, employers would only be fined between thousands to tens of thousands of yuan if they lose their lawsuits for bias against hepatitis B carriers.Meanwhile, a worker will spend a lot of time, energy and money to file a lawsuit and collect evidence in order to win.Liu Xiaonan, an associate professor with the China University of Political Science and Law, called on the government to hammer out a particular law and set up a special committee to investigate discrimination cases in order to ensure the rights of workers.In the statement released Saturday, the health ministry also ordered a careful investigation of all cases of hepatitis B discrimination, and promised that violators would be exposed and punished in accordance with laws and regulations.Medical tests show that hepatitis B virus can only be transmitted from mother to child during childbirth or by contact with the blood or other body fluids of an infected person.

来源：资阳报