INTERNET
Who Owns the World Wide Web?
Verisign, a corporation that started out small, has done a bit more than build
hotels on Baltic and Mediterranean. According to a June 25 article in Fortune,
it holds a remarkable near-monopoly on information flow. It operates behind
the scenes and is well-known mostly to tech-savvy webheads, financial investors,
and the federal Commerce Department.
In a vault with the security and austerity of nuclear missile silos, banks
of computers handle data and transactions for Microsoft, Ford, GE, Texas Instruments,
Bank of America, and First Union Bank. Each corporation has entrusted Verisign
with the secret codes that allow the computers to sign and exchange documents
with each other.
If you have ever checked into Web-based e-mail or purchased something online,
you've probably seen Verisign's calling card: the small padlock that
appears in the lower right corner of your browser, telling you your connection
is secure. The icon is generated by their servers, where sophisticated software
protects sensitive password and credit card information. In addition, those
servers are where any online purchase is actually processed. Verisign handles
about $2 billion in credit card transactions anually, and that's only one
part of the $360 billion volume of overall Internet commerce.
The design and use of security is what got Verisign started in the Internet
business. Competitors such as Entrust and Baltimore Technologies also had online-authentication
software, but they chose to sell the program itself, whereas Verisign contracted
itself as a service. Then, at the height of the tech-stock bubble, Verisign
used its own stock to purchase Network Solutions, along with its government-sanctioned
monopoly to manage any and all domain names ending in .net, .org, and .com.
Its servers handle 2 billion domain name searches daily.
For every server that runs credit card transactions, companies such as Amazon.com
or CDNow.com pay $900. For every .net, .org, and .com address in its database — 20
million .coms alone, and thousands more per year — its government contract
pays $6. The investments and cash-on-the-barrel-head it has on-hand could sustain
profits and operations for two full years without taking on any new business.
Some people believe the amount of power Verisign wields is unsettling. In addition
to hackers burning Verisign's CEO, Stratton Sclavos, in effigy, the Commerce
Department recently renegotiated a deal where the company would give up the
.net and .org databases. With seven brand-new domain names in development (including
.biz, .info, and .pro), Verisign will remain powerful if not dominant.
GENE THERAPY
Human Trial Shows Promise
Type A hemophilia is a genetic condition in which a single mutation robs the
body of its ability to manufacture a protein known as factor VIII. Without this
protein, patients bleed profusely from minor cuts and bruises and even suffer
spontaneous hemorrhages within joints. Only injections of purified factor VIII
allow their blood to clot and wounds to heal.
Science News reported on a study in the New England Journal of Medicine
in which skin cells were harvested from six people with hemophilia A. The
cells were impregnated with bacterial DNA that contained the gene for factor
VIII production, then cultured for injection into the test subjects. Three subjects
were administered 100 million cells, and the other three were given 400 million.
Tests administered over the course of a year indicated that all three members
of the high-dose group and one member of the low-dose group had elevated levels
of factor VIII in their blood. Two of the patients for whom the therapy had
the strongest effect did not report any need for clotting factor injections
for 10 months, beginning shortly after the treatment.
Clotting factor levels, though elevated, were still far below normal levels.
Other hematologists question whether the 2 percent to 4 percent of normal factor
VIII levels is in fact a therapeutic amount, or if the lack of a control group
can account for any possible placebo effect. They question whether any of the
subjects failed to take clotting-factor concentrates because they expected to
feel better. Further research may better indicate exactly how much the treatment
helps, and if the duration of benefits could be extended.
Hematology researchers are nevertheless enthusiastic about the implications
of the therapy, which marks the first human trial of gene therapy for the disease.
Hemophilia A has been an inviting subject for recombinant gene techniques, due
to its origin in a single mutation. Delivering a viable copy of the gene in
question continues to be a difficult task for researchers, though certain developments
for both hemophilia A and B show promise.
DEMOGRAPHICS
Young Adults Can Go Home Again
Birds of prey such as condors and eagles often return to the same nests year
after year for many generations, but a recent trend seems to indicate that many
young Americans aren't waiting that long. Increasingly, young adults are
moving back in with their parents more often and for longer periods of time.
According to an article by Pamela Paul in the June issue of American Demographics,
18 million unmarried 20- to 34-year-olds currently live with their parents.
Given the total number of the generation's singles, that's 38 percent — and
the number seems likely to increase. This year, 56 percent of college students
(670,000) plan to live at home for a period of time after graduation, and 19
percent anticipate staying longer than a year.
This marks a shift in both numbers and attitudes. Thirty years ago, only nine
percent of men and seven percent of women lived at home. As recently as 1998,
those figures had risen to only fifteen and eight percent.
American Demographics speculated that the shift is at least partly generational.
In the early 1990s, Gen Xers were often forced to live at home by a job market
that wouldn't fulfill the promise of their college degrees. The ongoing
trend softened the negative judgments toward the end of the decade, making both
parents and children more comfortable with the situation. Since the late 1990s,
the generation of college graduates has shifted from Generation X and their
Silent Generation parents to so-called Gen Y, whose baby boomer families are
much more flexible in support of their children.
The current job market also lends itself to the security of the home. Young
adults could pursue vocational or associate's degrees, or earn their bachelor's,
master's, or doctorate. Job options run from full-time to only temporary,
and as of the year 2000, 27 percent of college students didn't expect to
work longer than a year at their first job. This outweighs by five points the
percentage who planned to stay longer than three years.
In addition, the home may be preferable to a generation that is choosing to
marry and start homes of their own at later ages. In 1960, women typically married
at around 20 years old. Today, women tend to marry near 25, and men near 27.
Many historical markers of adulthood have lost significance or have been delayed:
marriage, college or high school graduation, military service, religious ritual,
or the onset of puberty. As definitions fluctuate, so too do does resistance
to a crowded nest.
MEDICINE
New Device Destroys Blood-Borne Pathogens
Discover magazine's editors' choice award for 2000 was given
to Laurence M. Corash of Cerus Corporation for his development of a device to
purify whole blood and plasma before transfusion. Dubbed the Helinx blood purification
box, the device disables any DNA molecules contaminating donated blood.
Blood plasma, platelets, and red blood cells all contain no DNA of their own,
and thus pass through unaffected. White blood cells have cell nuclei, and thus
DNA. Their destruction is essential because they can trigger a rejection response
in the recipient. Standard practice is to subject the blood to gamma rays, but
unfortunately that procedure is not 100 percent effective.
In addition to the risk of immune response, infectious diseases are also a
constant problem. Blood banks test for hepatitis B and C, HIV, and syphilis
and destroy contaminated supplies. But it is prohibitively expensive to screen
90 million units of blood each year for other pathogens, such as malaria, herpes,
and Lyme disease. The risk of viral infection per unit of blood is 1 in 34,000
and climbs to 1 in 1,700 for a bacterial infection via platelet transfusion.
Helinx attacks all DNA indiscriminately, however. A constant danger is the presence
of some unknown, emerging pathogen, and so Helinx's blanket effect is even
more appealing.
When certain organic compounds, called psoralens, are introduced into a sample
of blood, they are chemically attracted to DNA and begin orbiting the molecules.
But when activated by ultraviolet light, they react with two of the four base
amino acids that comprise DNA. Suddenly bound in a chemical straightjacket,
the DNA can no longer replicate itself, leading to the rapid death of all afflicted
bacteria and white blood cells. Because the same bases are also present in RNA,
Helinx disables viruses as well. Red blood cells absorb UV light, and so the
technique was refined to incorporate psoralens that activate in response to
a shift in pH.
Cerus Corporation projects that blood banks in Europe could be cleaning blood
supplies as early as next year, and the year after in the United States.
Copyright © 2001 by the Catholic Health Association of the United States
For reprint permission, contact Betty Crosby or call (314) 253-3477.