From VOA Learning English, this is the Health Report.
Hundreds of thousands of children become infected with the AIDS virus every year. There boys and girls are born to mothers who have HIV, the human immunodeficiency virus. Infection takes place during pregnancy or from breastfeeding.
Recently, Scientists identified a protein in breast milk that suppresses the virus, the protein may even protect babies from become infected. Now, Experts say the discovery could lead to new ways to protect babies whose mothers are infected with HIV.
FILE - Breastfeeding
To prevent Infection, doctors give Anti-retroviral drugs to both mothers and their babies, that has greatly reduced the number of infections. But experts say that even without anti-AIDS drugs, only a small percentage of babies become infected through breast milk.
Sallie Permar is a professor of pediatrics and immunology at Duke University in North Carolina. She says, breastfeed babies appear to resist infection.
"It is actually remarkable that despite the infant being exposed to the virus multiple times daily for up to two years of their life, actually only 10 percent of those babies will become infected," said Permar.
The low rate of the infection was of great interest to researchers, including Sallie Permar. She led an effort to identify a substance in breast milk that may protect babies from infection.
Her team directed its attention to a protein called Tenacin-C, also called TNC. It is known to be involved in the process of healing wounds. But what purpose it serves in breast milk is not known.
The researchers exposed the TNC protein from breast milk of uninfected women to HIV, the protein linked up to the virus and made it harmless.
Antiretroviral drugs remain effective in limiting the passing of HIV from mother to baby. But professor Permar and her team suggest the TNC could be used in places where costly drug treatments are often not available.
"The issues are access to the drugs as well as monitoring. There are issues of toxicity and anti-retroviral drug resistance. And so we think alternative strategies may be needed to completely eliminate infant transmission," she Permar.
She suggests that TNC could be given to babies before breastfeeding to provide additional protection against HIV. She adds that the protein is safe, because it is already in natural part of human milk. This may avoid the problem of HIV become resisted to Antiretroviral drugs.
The team reported its findings in the journal Proceedings of the National Academy of Sciences.
And that is the Health Report from VOA Learning English. I'm June Simms.
1.breastfeeding n. 母乳哺育
Leading scientists claim breast-fed babies are intellectually brighter.
Anti - retroviral drugs can extend life for many years.
3.pediatrics n. 小儿科
He received a Bachelor's drgee of Pediatrics.
4.immunology n. [免疫] 免疫学
Tumor immunology and immunotherapy are but one of the exciting areas in cancer research.
5.toxicity n. [毒物] 毒性
substances with high levels of toxicity
1.It is actually remarkable that despite the infant being exposed to the virus multiple times daily for up to two years of their life.
exposed to 接触；暴露于
The soldiers in the open field were exposed to the enemy's gunfire.
The broken windows left us exposed to the sub - zero temperatures.
2.The researchers exposed the TNC protein from breast milk of uninfected women to HIV, the protein linked up to the virus and made it harmless.
link up 会合；连接；联系
They have planned to link up the two areas by telephone.
Engineers can link up distant countries by radio or telephone.