|
| |
Bioprocessing
Industry Technical Notes
By Alex
Kanarek
Bio-Rad
has developed two new fully automated testing systems for the detection of
BSE ("Mad Cow" disease). In conjunction with these systems, the
company is introducing a second-generation BSE screening test, along with
the first commercially available Western blot confirmation test sensitive
enough to be used to verify the screening results. The new confirmatory
test can produce results in one day, compared with the up to three days
required for the traditional immunohistochemistry confirmatory test. The
combination of the new systems and these tests should result in
considerable saving of time and labor in laboratories performing the
required BSE tests. They will be launched over the next two months,
subject to approval by the regulatory authorities.
Nabi Corp. announced February 13, 2002, that a single injection
of its experimental vaccine StaphVAX™ - an Staphylococcus aureus
polysaccharide conjugate vaccine - reduced blood stream S. aureus
infections in end-stage kidney disease patients by almost 60%. These
results are from a Phase II clinical trial reported in the February 14
issue of The New England Journal of Medicine. The trial was
conducted by investigators from Kaiser Permanente in collaboration with
scientists from the NIH and Nabi.
Infigen and its agricultural affiliate, Genmark,
announced on February 11, 2002, the successful production of the
agricultural industry's first clones of adult pigs. The clones were from
two boars renowned for superb offspring and were produced from nonfetal
cells. Three nuclear transfers from the cell line created from the boar
"The Man" resulted in one successful pregnancy with the litter
arriving on January 14. Three nuclear transfer from cells from the other
champion boar "401K" (now deceased) yielded three successful
pregnancies, farrowed on December 25, January 6, and January 14. All
piglets are doing well.
Prairie State Semen (PSS), owners of the two boars, stated that
"the clones would greatly expand the industry's access to the highly
meritorious genetics of these two boars, to benefit the swine breeding and
show pig communities worldwide." "The Man" is a Champion
Yorkshire pig and cost PSS $77,000 at the 2000 Indiana State Fair, a breed
record at that time, while "401K" was bought for $43,000 in
1997, another record. Dr. Michael Bishop, President and Chief Scientific
Officer of Infigen said that "these clones demonstrate that our
nuclear cloning technology is a highly efficient, economical approach and
a proven platform for propagating animals of high genetic merit.
GlaxoSmithKline stated on January 31, 2002, that it will begin a
Phase I clinical trial this year in the US of a vaccine intended to
prevent HIV infections. The vaccine was developed at the GSK Vaccine Unit
in Rixensaart, Belgium. It contains two key HIV surface proteins plus an
adjuvant. Studies in rhesus monkeys demonstrated the vaccine's ability to
protect them against simian immunodeficiency virus, a potent surrogate for
HIV.
This announcement came a few days after a statement published by Dr.
John Moore of Cornell University, who stated in Nature that rivalry
between the National Institutes of Health and the Department of Defense in
HIV vaccine development is hindering the process in the US. He claims
there is competition for funding and a duplication of effort. He wrote
that "This state of affairs should not be allowed to continue. A
coordinated effort could make so much more progress than one that is
fractured by institutional rivalries." Moore described separate
efficacy trials planned by both NIH and the DoD of a similar type of HIV
vaccine that few independent scientists think will work, considering that
"it is arguable whether it needs to be done once, but it certainly
doesn't need to be done twice."
Then, on February 5, GenVec announced that it received a
contract from the Vaccine Research Center at NIAID to use its adenovirus
vector technology to develop and manufacture clinical grade vaccine
candidates for the prevention of AIDS. Preclinical studies have suggested
that using replication-deficient adenovirus vectors, such as those
developed by GenVec, to express virus-associated proteins can elicit
potent and protective B cell and T cell immune responses. The contract has
been issued and will be managed on behalf of NIAID by SAIC Frederick, Inc.
In addition to this contract, GenVec has had a CRADA with NIAID since
October 2001 to evaluate and develop adenoviral vectors expressing
modified HIV-1 genes.
Lastly, a potentially very useful advance in the administration of
lyophilized products was recently described by PenJet® Corp. The
company has received a US patent for mixing a lyophilized drug with a
diluent in a needleless injector prior to administration. The PenJet
device is about half the size of a fountain pen and administers the
product through the skin by a patented self-contained inert gas system. It
can be packaged with a lyophilized drug in its integral ampoule. The user
docks the diluent container in front of the ampoule and the diluent is
transferred into the drug container. There is a "shuttle" system
that allows the dissolved drug to be passed back and forth between the two
chambers for thorough mixing. The diluent container is then removed and
the reconstituted drug is injected. The PenJet is single-use and
disposable. It can be safely disposed, as it has no needle and all the
drug is dispensed.
This set of
news and observations is representative of the Technical Notes section
that appears regularly in Bioprocess News, a monthly newsletter from
D&MD Publications. It was written by Alex Kanarek, contributing editor
of Bioprocess News, president of Bio-Development Consulting Services, and
author of several reports and guides for D&MD Publications, including
"The Bioprocessing Industry," an in-depth market analysis of the
technologies and companies involved in this critical area of the
biopharmaceutical business, and guides to Good Laboratory Practice, Good
Manufacturing Practice, and Good Clinical Practice.
To
view and purchase D&MD reports click
here!
| |
|