1.   Another was an oncogene called ras, which is found in many human tumors.

2.   But there is mounting evidence that the virus infects humans and is associated with certain types of human tumors.

3.   Could such a substance, if purified from shark cartilage or elsewhere, somehow be used to keep blood vessels from growing in human tumors?

4.   In laboratory tests, discodermolide has slowed the growth of human tumors planted in mice, Longley said.

5.   In the experiment, human prostate tumors were implanted into the backs of eight mice and allowed to grow to a uniform size.

6.   It is this concept that he has now proved under special conditions, those of human tumor cells growing in a mouse.

7.   It seemed to be a sure-fire way to uncover oncogenes inside human tumors.

8.   McCormick has an ingenious scheme for pitting the adenovirus against human tumors.

9.   Milner has also studied five human tumors in laboratory cultures and has shown that one garlic compound, diallyl disulfide, is very effective in inhibiting tumor growth.

10.   Mouse tumors, for example, may grow much faster than human tumors, making them more sensitive to chemotherapy that targets rapidly dividing cells.