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Page 6/The Battalion/Wednesday, January 13, 1988
542
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543
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544
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546
W
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547
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548
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845-
Scientists: Lasers may cleanse
blood of infections, AIDS virus
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WASHINGTON (AP) — A Bay
lor medical research team, financed
in part by the Pentagon’s star wars
anti-missile program, has concluded
that lasers can be used to cleanse do
nated blood of the deadly AIDS vi
rus and other infectious agents.
Dr. James L. “Les” Matthews said
in an interview that his team had
demonstrated that the combination
of a non-toxic dye and laser light
could destroy a number of viruses in
blood — including the AIDS virus —
without harming the blood itself.
The team was from the staff of
the Baylor University Medical Cen
ter and Baylor Research Foundation
in Dallas.
The procedure for now remains
an experimental one and has been
tested only on a small scale in the
laboratory, Matthews said. But with
follow-up work, he said, it appears
the laser-dye procedure could be
“But we are confident now the (laser) exposure system
does kill the AIDS virus (in the culture). ”
Dr. Jaines L. ‘‘Les'’ Matthews,
Baylor researcher
Two children
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through ice
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BOWIE (AP) — Two children
who fell through thin ice into a
North Texas pond died after being
underwater as long as 35 minu
tes. Doctors tried for two hours to re
vive them.
Timothy Williams, 9, and
Amanda Bell, 8, were pulled from
Joy Farm pond Monday evening af
ter frantic efforts to Find them in the
cold, deep water, authorities said.
Doctors pronounced the youngsters
dead shortlv alter 9 p in. at Bowie
Memorial Hospital.
Police officer Patrick Walters said
he found the children after wrap
ping a rope around his waist and
dropping through one of the holes
in the ice.
Wallers said he “felt something on
my lower leg” as he lowered himself
through the hole. “I pulled it, and it
was one of the kids,” he said.
Walters called for help and had
the child in his arms when some
thing else brushed against his leg. It
was the other youngster.
The children’s mothers searched
the area with flashlights before help
arrived, said officer Gary Whitaker,
the first person at the scene after the
police dispatcher received a call at
6:10 p.m.
After the children were brought
to the bank. Department of Public
Safety Trooper John 1 ellizzari ad
ministered cardiopulmonary resus
citation.
used to cleanse blood at a “flow rate”
of about a pint every 15 minutes —
sufficient to allow its use by blood
banks.
That, in turn, could offer blood
banks a virtually foolproof means of
guaranteeing the safety of their do
nated supplies.
According to Matthews, the laser
system so far has been tested on
flowing blood containing the herpes
simplex virus and on a flowing cul
ture medium containing the AIDS
virus. In those tests, measurements
have been completed demonstrating
the viral agents were completely de
stroyed, he said.
Blood containing the AIDS virus
has also been put through the sys
tem, but no measurements have
been made after that type of experi
ment to confirm the AIDS virus was
completely killed, Matthews said.
“But we are confident now the
(laser) exposure system does kill the
AIDS \irus (in the culture) and also
that the presence of blood doesn’t
interfere with the effectiveness of
the system,’’ he said.
greater extent than surrounding tis
sue or cells.
If the dye-laden tumors or cells
are then “irradiated” with laser light,
a little-understood chemical process
is set off that destroys the viral cells,
the researcher said.
Matthews said he and seven col
leagues began their work by experi
menting with the dye-laser killing
combination on the herpes simplex
virus in a standing culture.
Experiments then were begun us
ing the laser on herpes in a culture
medium as it flowed through a tube;
then on flowing blood with the
herpes virus, and then on flowing
culture mediums with the AIDS vi-
“However, we have additional
tests to perform,” he said. “We re
gard this as a model system that we
propose to develop further. Our
guess is that it will take at least three
years, and maybe up to five years at
the most, to refine.”
The new procedure, under devel
opment since 1984, takes advantage
of the fact that tumors and certain
viral cells absorb or retain dyes to a
The tests with the herpes virus,
which serves as an excellent model,
demonstrated the laser-dye combi
nation can provide “a 100 percent vi
ral kill without seeing any evidence
of damage to the normal blood el
ements,” Matthews said.
Besides the herpes and AIDS vi
ruses, the technioue also has been
successfully testeci on measles and
another virus known as CMY, or cy
tomegalovirus, Matthews said.
A scientific paper written by Mat
thews and his team explaining the
work was published Tuesday in
“Transfusion,” the journal of the
American Association of Blood
Banks.
Defense Department officials had
disclosed the research three months
ago in discussing beneficial “spin-
oir programs, but Mattfo
dined interviews pending : i
tion of the paper) He *
speak Monday.
AIDS — acquired immurj
ciency s\ ndrome — is a fat
that cripples the body’s
protect itself against infect)
cure has been found. AccoJ
the Centers for Disease CoJ
AIDS epidemic in the L'nitel
has just surpassed the 50i
mark.
1 he disease can be trail
through tainted blood dJ
and for that reason, the Rt|
and other blood-collectionc
lions now routinely screen
nated blood for the virus.
Recent medical researchit-j
howev er, it is possible forail
show no sign of the diseaseft
months af ter he is first expo*!
I : i< - possibility that n
associated AIDS mav result!
blood unit . . . that tested |
makes it imperative that as
effective means of viral killinj
veloped," Matthews’ pape:[
“The system reported heitj
promise as an effective apprj
this problem.” |
Matthews said the Perl
Strategic Defense Initiativei|
zation is providing Baviorr
$500,000 a year for wort |
blood-cleansing si tidy
other projects involving then
application ol laser technolot
also are being explored fort
The Star Wars funding!
crucial in the ef fort to refiuec
blood-cleansing system bed
will allow the researchers
w ith a device known as a ltd
iron laser, Matthews said.
Such a laser can be tuned]
duce beams of concentrated!
different wavelengths and!
vastlv simplifying ex peril!
said.
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top tv
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Good Grief.
DECISION ANALYSIS - Raiffa mil
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Mim Bmrtd
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