Word: tumors
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...research finds promising leads in the genes of tumor cells...
...with specific types of cancer. Virologists have clarified the role that viruses can play in altering DNA. And molecular biologists have used the new tools of genetic engineering to pinpoint precisely which gene, out of the tens of thousands present in every human cell, is responsible for causing a tumor...
...cancer. A gene from a normal human bladder cell contains about 6,000 chemical constituents or bases. The difference between this gene and one that produces bladder cancer involves only one of those 6,000 bases. Says Weinberg: "That very subtle change led to the creation of a tumor...
...also discovered that in a type of cancer called Burkitt's lymphomas, a gene that is apparently associated with annual cancers may be inserted near the spot where authorities are actively produced. The tumor generated may be submitted to a pattern of abnormal growth because of its proximity to the immunoglobulin gene...
...Thus the biological community was rocked last week by the news that a strain of albino lab mice used by cancer investigators everywhere was genetically contaminated. The tainted mice were discovered by University of Wisconsin Biologist Brenda Kahan and her colleagues while they were growing a primitive type of tumor called a teratocarcinoma. A puzzling enzyme uncharacteristic of the breed kept showing up hi the host animals, a common strain known as BALB/c. Careful genetic tests soon confirmed suspicions: the mice were not the purebreds promised by their supplier, the Massachusetts-based Charles River Breeding Laboratories, Inc. Since the company...