SCIENCE IN THE NEWS - Diabetes and Alzheimer's / Treatment f

SCIENCE IN THE NEWS - Diabetes¹ and Alzheimer's / Treatment for Alzheimer's / No Link between Vaccine² and Autism
By

Broadcast: Tuesday, May 25, 2004

VOICE ONE:

This is SCIENCE IN THE NEWS, in VOA Special English. I'm Sarah Long.

VOICE TWO:

And I'm Bob Doughty³. Coming up, we have reports about Alzheimer's disease.

VOICE ONE:

And, a scientific committee finds no link between autism and the measles⁴-mumps⁵-rubella vaccine.

(THEME)

VOICE TWO:

 
On the right, a brain of a person with Alzheimer's disease.
There is more evidence that people with diabetes have an increased risk of Alzheimer's disease. This disease kills brain cells and usually affects people late in life. It starts with mild memory loss, but gets worse. Over time, it leads to death.

Researchers at Rush University Medical Center in Chicago studied more than eight-hundred people. The research was part of a project called the Religious Orders Study. The men and women were all Roman Catholic, over the age of fifty-five. They included priests and nuns⁶. They were tested yearly for an average of more than five years.

One-hundred-fifty-one of the people in the study developed Alzheimer's disease. These included thirty-one people who also had diabetes. The researchers found a sixty-five percent increase in the risk of Alzheimer's in those with diabetes. This was compared to the people who did not have the blood sugar disease.

VOICE ONE:

The researchers tested the ability of the people to remember and understand things. At the start of the study, they found that those with diabetes did not do as well on these tests as those without diabetes. During the study, the researchers found that diabetes was related to decreases in some mental systems but not in others.

Diabetes is already a known risk for stroke, which can cause some kinds of brain disorders⁸. Diabetes has also been linked to other health effects like heart disease, kidney failure and reduced mental abilities. Some scientists believe that a build-up of sugar in the brain could damage cells and increase the risk of Alzheimer's.

VOICE TWO:

The study adds to research on possible links between diabetes and Alzheimer's disease. The scientists say more research will tell if treatments for diabetes may reduce the risk of Alzheimer's.

There is no cure, but there are treatments that can ease some of the effects of Alzheimer's. Most scientists think the disease is caused by a combination of genetic⁹ and environmental influences.

Earlier research found that eating foods high in vitamin E may reduce the risk of Alzheimer's in some people. Such foods include green leafy vegetables, vegetable oils and nuts.

Researchers say people who remain intellectually active may also reduce their risk. But depression and being stressed a lot may increase the risk.

The National Institute on Aging paid for the study. The American Medical Association published the findings in its Archives of Neurology.

VOICE ONE:

More and more people are developing diabetes. In the United States, health officials estimate that one in three children born in two-thousand could become diabetic. They say the only way to prevent this is for many more people to start eating less and exercising more.

People can reduce their chances of getting diabetes. Steps include controlling their blood pressure and cholesterol¹⁰, not using tobacco and not drinking too much alcohol. Weight control is also important.

(MUSIC)

VOICE TWO:

In the United States, Alzheimer's disease affects an estimated four-point-five million people. This number is expected to grow sharply as the population gets older. But a new report calls Alzheimer's an "unrecognized public health crisis" among the growing Hispanic population in the United States.

The report is from the Alzheimer's Association, a group that supports research and provides services. It says about two-hundred-thousand Hispanics in the United States currently are living with Alzheimer's. It says this number is expected to grow to one-point-three million by two-thousand-fifty.

VOICE ONE:

Old age is the greatest risk for Alzheimer's disease. And the report says Hispanics in the United States are expected to live longer than any other ethnic¹¹ group. It says that by two-thousand-fifty, life expectancy¹² for Hispanics will reach eighty-seven years. They would represent sixteen percent of old people in the United States. Hispanics now make up five percent of older Americans.

The Alzheimer's Association says Hispanics also have increased rates of diabetes. This may put them at higher risk for Alzheimer's. But the group says Hispanics are less likely to see doctors and receive medical treatment.

The report also notes that some studies suggest that education may help protect against Alzheimer's. But it says ten percent of older Hispanics never attended school. And it says more than half have eight years of schooling¹³ or less.

The association says there should be more efforts to educate people about Alzheimer's in their own language. And it wants the government to spend more money on Alzheimer's research.

(MUSIC)

VOICE TWO:

There may be hope for better ways to slow the progress of Alzheimer's disease.

In one small study, scientists from the University of California, San Diego, worked with eight patients and some genetic engineering. All eight had early forms of Alzheimer's. Doctors took skin cells from each of them. The team changed the genetic structure of the cells to make them produce a protein called Nerve Growth Factor.

Later the doctors returned the cells to the patients. But not to the skin. They placed the cells in a part of the brain involved in memory and understanding. This is where Alzheimer's first begins to attack.

VOICE ONE:

At first the doctors operated with the patients in a light sleep under anesthesia. Two of the people moved. This led to bleeding in their brains. One of those patients died of a heart attack five weeks later. The doctors put the other six people in a deep sleep under general anesthesia. They say those operations went smoothly¹⁴.

The doctors later studied images of the patients' brains. They reported increased cell growth activity compared to other people with Alzheimer's.

Also, the researchers tested the mental abilities of the patients. They say that on one measure, the rate of progression of the disease dropped by half after the cell replacement¹⁵. On another, the doctors say a reduced rate continued for the eighteen-month to two-year period of the study.

VOICE TWO:

Doctor Mark Tuszynski led the study. He says no harmful effects have been found more than a year after the last operation. But he notes that testing is needed on larger numbers of people. Also, a new study will test a method of directly injecting the genetically¹⁶ engineered cells into the brain.

The scientists reported their findings at the yearly meeting of the American Academy of Neurology.

(MUSIC)

VOICE ONE:

We close with news about a brain disorder⁷ in children. Last week, in the United States, the Institute of Medicine said it found no connection between autism and a common vaccine. The Institute of Medicine is a private organization that advises the government. It is related to the National Academy of Sciences. A committee released its eighth and final report on vaccine safety.

The scientists looked at studies of autism and the M.M.R. vaccine. This is a combined vaccine that prevents measles, mumps and rubella. The scientists also looked at studies of a mercury-based substance once used to protect the vaccine from bacteria. The substance is called thimerosal. And they compared the use of the vaccine with rates of autism.

Doctor Marie McCormick of Harvard University led the committee. She noted¹⁷ that scientists do not know what causes autism. In fact, she says there may be many causes. And she says these may or may not include bad reactions to a vaccine or the effects of mercury in some people. But the committee found no evidence to support accusations¹⁸ by some groups about the M.M.R. vaccine or thimerosal. The committee says any such suggestions are theories only.

(THEME)

VOICE TWO:

SCIENCE IN THE NEWS was written by Caty Weaver¹⁹ and Cynthia Kirk, who was also our producer. This is Bob Doughty.

VOICE ONE:

And this is Sarah Long. Listen again next week for more news about science, in Special English, on the Voice of America.

1 diabetes   

n.糖尿病

参考例句：

• In case of diabetes, physicians advise against the use of sugar.对于糖尿病患者，医生告诫他们不要吃糖。
• Diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的。

2 vaccine   

n.牛痘苗，疫苗；adj.牛痘的，疫苗的

参考例句：

• The polio vaccine has saved millions of lives.脊髓灰质炎疫苗挽救了数以百万计的生命。
• She takes a vaccine against influenza every fall.她每年秋季接种流感疫苗。

3 doughty   

adj.勇猛的，坚强的

参考例句：

• Most of successful men have the characteristics of contumacy and doughty.绝大多数成功人士都有共同的特质：脾气倔强，性格刚强。
• The doughty old man battled his illness with fierce determination.坚强的老人用巨大毅力与疾病作斗争。

4 measles   

n.麻疹，风疹，包虫病，痧子

参考例句：

• The doctor is quite definite about Tom having measles.医生十分肯定汤姆得了麻疹。
• The doctor told her to watch out for symptoms of measles.医生叫她注意麻疹出现的症状。

5 mumps   

n.腮腺炎

参考例句：

• Sarah got mumps from her brother.萨拉的弟弟患腮腺炎，传染给她了。
• I was told not go near Charles. He is sickening for mumps.别人告诉我不要走近查尔斯， 他染上了流行性腮腺炎。

6 nuns   

n.（通常指基督教的）修女， （佛教的）尼姑( nun的名词复数 )

参考例句：

• Ah Q had always had the greatest contempt for such people as little nuns. 小尼姑之流是阿Q本来视如草芥的。 来自《现代汉英综合大词典》
• Nuns are under vows of poverty, chastity and obedience. 修女须立誓保持清贫、贞洁、顺从。 来自辞典例句

7 disorder   

n.紊乱，混乱；骚动，骚乱；疾病，失调

参考例句：

• When returning back,he discovered the room to be in disorder.回家后，他发现屋子里乱七八糟。
• It contained a vast number of letters in great disorder.里面七零八落地装着许多信件。

8 disorders   

n.混乱( disorder的名词复数 )；凌乱；骚乱；（身心、机能）失调

参考例句：

• Reports of anorexia and other eating disorders are on the increase. 据报告，厌食症和其他饮食方面的功能紊乱发生率正在不断增长。 来自《简明英汉词典》
• The announcement led to violent civil disorders. 这项宣布引起剧烈的骚乱。 来自《简明英汉词典》

9 genetic   

adj.遗传的，遗传学的

参考例句：

• It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
• Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。

10 cholesterol   

n.（U）胆固醇

参考例句：

• There is cholesterol in the cell of body.人体细胞里有胆固醇。
• They are determining the serum-protein and cholesterol levels.他们正在测定血清蛋白和胆固醇的浓度。

11 ethnic   

adj.人种的，种族的，异教徒的

参考例句：

• This music would sound more ethnic if you played it in steel drums.如果你用钢鼓演奏，这首乐曲将更具民族特色。
• The plan is likely only to aggravate ethnic frictions.这一方案很有可能只会加剧种族冲突。

12 expectancy   

n.期望，预期，（根据概率统计求得）预期数额

参考例句：

• Japanese people have a very high life expectancy.日本人的平均寿命非常长。
• The atomosphere of tense expectancy sobered everyone.这种期望的紧张气氛使每个人变得严肃起来。

13 schooling   

n.教育；正规学校教育

参考例句：

• A child's access to schooling varies greatly from area to area.孩子获得学校教育的机会因地区不同而大相径庭。
• Backward children need a special kind of schooling.天赋差的孩子需要特殊的教育。

14 smoothly   

adv.平滑地，顺利地，流利地，流畅地

参考例句：

• The workmen are very cooperative,so the work goes on smoothly.工人们十分合作，所以工作进展顺利。
• Just change one or two words and the sentence will read smoothly.这句话只要动一两个字就顺了。

15 replacement   

n.取代，替换，交换；替代品，代用品

参考例句：

• We are hard put to find a replacement for our assistant.我们很难找到一个人来代替我们的助手。
• They put all the students through the replacement examination.他们让所有的学生参加分班考试。

16 genetically   

adv.遗传上

参考例句：

• All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
• Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物

17 noted   

adj.著名的，知名的

参考例句：

• The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
• Jim is noted for arriving late for work.吉姆上班迟到出了名。

18 accusations   

n.指责( accusation的名词复数 )；指控；控告；（被告发、控告的）罪名

参考例句：

• There were accusations of plagiarism. 曾有过关于剽窃的指控。
• He remained unruffled by their accusations. 对于他们的指控他处之泰然。

19 weaver   

n.织布工；编织者

参考例句：

• She was a fast weaver and the cloth was very good.她织布织得很快，而且布的质量很好。
• The eager weaver did not notice my confusion.热心的纺织工人没有注意到我的狼狈相。