home *** CD-ROM | disk | FTP | other *** search
- <text id=93TT2020>
- <title>
- July 19, 1993: Target:Tumors
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1993
- July 19, 1993 Whose Little Girl Is This?
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- MEDICINE, Page 53
- Target: Tumors
- </hdr>
- <body>
- <p>A "smart bomb" against cancer in mice must still prove itself
- in humans.
- </p>
- <p> If headlines could cure deadly diseases, then everyone would
- have rejoiced last week. Across the U.S., newspapers heralded
- the development by scientists from Bristol-Myers Squibb of a
- "smart bomb," or "magic bullet," against cancer. The weapon,
- a type of protein called a monoclonal antibody combined with
- an anticancer drug, has wiped out a wide variety of tumors in
- laboratory mice.
- </p>
- <p> Before people get too excited, though, they should know that
- researchers have attacked cancer with many kinds of monoclonal
- antibodies for 15 years and that success in mice has spawned
- only limited benefit in people. Back in the 1980s, Wall Street
- briefly went wild over the stocks of companies developing antibody
- therapies, but repeated disappointments and unfulfilled promises
- taught investors to stop expecting instant miracles.
- </p>
- <p> That said, the results reported last week by New Jersey-based
- Bristol-Myers Squibb in the journal Science were unusually promising,
- and they may give new momentum to this line of research. The
- monoclonal antibodies used against cancer are proteins designed
- to latch on to a specific molecule on the surface of a tumor
- cell, while leaving normal cells untouched. In Bristol-Myers
- Squibb's experiment, the antibody was linked with the common
- anticancer drug doxorubicin, and unlike many previous preparations,
- this combination enabled the drug to enter tumor cells, killing
- them from the inside.
- </p>
- <p> The combination of the antibody, acting as a guidance system
- that homes in on tumor cells, and doxorubicin, as the lethal
- payload, knocked out many kinds of advanced cancer in mice,
- including colon, lung and breast tumors that had spread to other
- organs. In earlier animal experiments, researchers were able
- to cure only those cancers that had not been growing very long
- or that had not metastasized. "One of the problems that have
- held back the field for a long time is that we were never sure
- that well-established solid tumors could be eliminated," says
- Dr. David Scheinberg, chief of the leukemia service at the Memorial
- Sloan-Kettering Cancer Center in New York City. "Now we know
- that that is indeed possible."
- </p>
- <p> But even the scientists from Bristol-Myers Squibb admit that
- any euphoria is premature. "I was surprised by the amount of
- press attention our study received," said Pamela Trail, who
- led the research team. "Obviously, we're tremendously excited
- by our data, but the true proof will be in the human trials."
- Within the next six months, the company will seek the Food and
- Drug Administration's permission to begin those crucial tests--and perhaps generate more meaningful headlines.
- </p>
- <p> By Christine Gorman
- </p>
-
- </body>
- </article>
- </text>
-
-