首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
医学
Several classes of bitter citrus compound have looked promising as anticancer agents in laboratory tests. A new study indicates
Several classes of bitter citrus compound have looked promising as anticancer agents in laboratory tests. A new study indicates
admin
2013-10-31
113
问题
Several classes of bitter citrus compound have looked promising as anticancer agents in laboratory tests. A new study indicates that long-term consumption of orange juice, a source of such chemicals cuts cancer risk in rats.
In test-tube studies, one class of the bitter compounds—flavonoids—has inhibited the growth of breast cancer cells. Related studies showed that bitter citrus limonoids similarly ward off cancer in animals. Mulling over such data, Maurice R Bennink of Michigan State University in East Lansing wondered whether drinking orange juice would have a beneficial effect.
His team injected 60 young rats with a chemical that causes colon cancer and then raised half of the animals on a normal diet. The others received orange juice instead of drinking water—and less sugar in their food to compensate for sugars in the juice.
At an American Institute for Cancer Research meeting last week in Washington D. C. , Bennink reported that after 7 months, 22 of the animals receiving a normal diet had developed colon cancers. Only 17 of the rats on the orange-juice diet showed tumors. That’ s 77 percent of the control group’ s incidence.
Concludes Bennink, whose work was supported by orange-juice producer Tropicana products of Brandenton, Fla. , " These data show orange juice helps protect against cancer. " He says that the study might also apply to breast, prostate, and lung cancers.
Bandaru S. Reddy of the American Health Foundation in Valhalla, N. Y. , was not surprised by Bennink’ s finding of an orange juice benefit. However, he calls the reported risk reduction unimpressive. His own data show that citrus limonoids protect against chemically induced colon cancer in lab animals.
Luke K. T. Lam of LKT Laboratories in St. Paul, Minn. , finds Bennink’ s data " quite interesting ," although he describes as " borderline" the suppression of cancer incidence observed by Bennink. Lam has inhibited tumors in the lung, skin and forestomach of mice with limonoinds.
The scientists don’ t know what compounds in orange juice underlie its effect. The juice is rich in one limonoid—a sugar-containing version of limonin, which suppressed tumors in Lam’ s experiments. It’ s possible, Lam speculates, that rats convert the juice’ s limonoid into limonin.
Indeed, argues Gary D Manners of the Agricultural Research Service in Albany, Calif. , " there is no doubt that these [ anticancer ] citrus compounds are bioavailable in animals to the site of a cancer. The question remains whether they are similarly available in people". To find out, his team will soon begin measuring the human body’ s uptake of limonoids from orange juice.
Both Reddy and Lam______.
选项
A、seemed to be surprisingly impressed by Bennink’ s findings
B、did not seem to be surprised by Bennink’ s findings
C、did not seem to believe in the orange juice benefit
D、seemed to be doubtful of Bennink’ s findings
答案
B
解析
Reddy提到自己was not surprised by Bennink’s finding…,而Lam则认为data“quiteinteresting”,并将其描述为是抑制癌症的“borderline”,故B项正确。
转载请注明原文地址:https://kaotiyun.com/show/CBU3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
Justbeforedawnwereceivedacallthatanunresponsiveinfantwasbeingbroughtbyemergencymedicalservicestoourhospital.
Justbeforedawnwereceivedacallthatanunresponsiveinfantwasbeingbroughtbyemergencymedicalservicestoourhospital.
Imagineadiseasespreadingacrosstheglobe,killingmostlymiddle-agedpeopleorleavingthemchronicallydisabled.Thenoned
Cultureshockmightbecalledanoccupationaldiseaseofpeoplewhohavebeensuddenlytransplantedabroad.Likemostailments,
Cultureshockmightbecalledanoccupationaldiseaseofpeoplewhohavebeensuddenlytransplantedabroad.Likemostailments,
A、Topresenttheadvantagesanddisadvantagesoflifeinsurance.B、Toencouragepeopletobuylifeinsurance.C、Totellpeopleh
BythetimeIreachedmyresidency,I______treatingthepatientasawholehumanbeing.
ManyCanadiansenjoytheluxuryofalargeamountoflivingspace.Canadaisvast,andthehomesarelargeaccordingtothestan
A、Culturaldifference.B、Gender-relateddifference.C、Ethnicaldifference.D、Socialrank.D录音讲到对于时间的观念不同是aculturaldifference,这
随机试题
简述行政权力的有限性的体现。
简述量变和质变的复杂多样性。
A.凝血功能障碍B.阴道分泌物异常C.恶变D.下腹包块E.输卵管破裂羊水栓塞导致
下列关于合同解除的哪些说法是正确的?
某股份有限公司申请其公司债券上市交易,下列哪一项构成证券监督管理机构驳回其申请的理由?()
民用10(6)kV屋内配电装置顶部距建筑物顶板的距离不宜小于下列哪项数值?()
合同分析,一般要分析的内容包括()。
Usually, the consignor is the sane party as the ( ).
税务机关在采取税收保全措施时,不在保全措施范围之内的物品是( )。
根据所给材料。回答136-140题。2001到2005年间中国贸易总额的排位()。
最新回复
(
0
)